Incinerator with afterburner

Claim 2

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, regulator means for controlling the rate of operation of said burner means, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature in said secondary chamber, a pasSageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases therein within predetermined limits to effect settling of particulate matter in the gases and to maintain proper combustion.

Claim 3

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, regulator means for controlling the rate of operation of said burner means, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature therein, discharge means directing the discharge of gases into said secondary chamber with sufficient velocity and direction to induce turbulent upflow of combustion products in said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases therein within predetermined limits to effect settling of particulate matter in the gases and to maintain proper combustion.

Claim 4

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, regulator means for controlling the rate of operation of said burner means, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature therein, discharge means directing the discharge of gases into said secondary chamber with sufficient velocity and direction to induce turbulent upflow of combustion products in said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases therein within predetermined limits to effect settling of particulate matter in the gases and to maintain proper combustion.

Claim 5

The incinerator of claim 2 wherein said discharge means direct the off-gases into said second chamber perpendicularly with respect to the burner discharge into said secondary chamber.

Claim 6

The incinerator of claim 1 wherein said blower communicates with the primary chamber through a distributor system including a series of nozzles located in the primary chamber walls.

Claim 7

The incinerator of claim 4 wherein said nozzles are adapted to direct a flow of air with substantially even distribution into the flame area of the primary chamber.

Claim 8

An incinerator comprising: a primary combustion chamber having access means therein for charging the primary chamber with a quantity of fuel, blower means adapted to discharge a positive supply of air in excess of the amount of air required for complete combustion to said primary chamber, air distributing means communicating the discharge from said blower with said primary combustion chamber, an afterburner chamber located adjacent said primary chamber, regulatable burner means adapted to supply air and fuel into said afterburner chamber, exhaust means communicating with said afterburning chamber and adapted to exhaust effluent gases therefrom, passageway means interconnecting said primary chamber with said afterburner chamber to direct the off-gases from said primary chamber to said afterburner chamber, said passageway means including restriction means associated therewith to control the velocity of the off-gases through said passageway whereby substantially all of the particulate material is caused to settle from said off-gases prior to entry in said afterburner chamber, and control means adapted to regulate said burner means to maintain a predetermined temperature in said afterburner chamber whereby essentially complete combustion of combustibles remaining in said off-gases occurs in said afterburner chamber.

Claim 9

An incinerator comprising: a primary combustion chamber having access means therein for charging the primary chamber with a quantity of fuel, blower means adapted to discharge a positive supply of air in excess of the amount of air required for complete combustion to said primary chamber, air distributing means communicating the discharge from said blower with said primary combustion chamber, an afterburner chamber located adjacent said primary chamber, regulatable burner means adapted to supply air and fuel into said afterburner chamber, exhaust means communicating with said afterburning chamber and adapted to exhaust effluent gases therefrom, passageway means interconnecting said primary chamber with said afterburner chamber to direct the off-gases from said primary chamber to said afterburner chamber, said passageway means including restriction means associated therewith to control the velocity of the off-gases through said passageway whereby substantially all of the particulate material is caused to settle from said off-gases prior to entry in said afterburner chamber, and control means adapted to regulate said burner means to maintain a predetermined temperature in said afterburner chamber whereby essentially complete combustion of combustibles remaining in said off-gases occurs in said afterburner chamber.

Claim 10

The incinerator of claim 6 wherein said air distribution system includes a plurality of air nozzles communicating with said primary chamber.

Claim 11

The incinerator of claim 6 wherein said passageway includes abutment means in the flow path of the off-gases to reduce the carryover of entrained particulate material into said afterburner chamber.

Claim 12

An incinerator comprising: a primary combustion chamber having access means therein for charging the primary chamber with a quantity of fuel, blower means adapted to discharge a positive supply of air in excess of the amount of air required for complete combustion to said primary chamber, air distributing means comprising a plurality of nozzles communicating the discharge from said blower with said primary combustion chamber, said nozzles are oriented to direct air into the flame area of the combustion chamber and substantially away from the area occupied by the access means, an afterburner chamber located adjacent said primary chamber, regulatable burner means adapted to supply air and fuel into said afterburner chamber, exhaust means communicating with said afterburning chamber and adapted to exhaust effluent gases therefrom, passageway means interconnecting the upper portion of said primary chamber with the lower portion of said afterburner chamber to direct the off-gases from said primary chamber to said afterburner chamber, said passageway means including restriction means associated therewith to control the velocity of the off-gases through said passageway whereby substantially all of the particulate material is caused to settle from said off-gases prior to entry in said afterburner chamber, and control means adapted to regulate said burner means to maintain a predetermined temperature in said afterburner chamber whereby essentially complete combustion of combustibles remaining in said off-gases occurs in said afterburner chamber.

Claim 13

An incinerator comprising: a primary combustion chamber having access means therein for charging the primary chamber with a quantity of fuel, blower means adapted to discharge a positive supply of air in excess of the amount of air required for complete combustion to said primary chamber, air distributing means comprising a plurality of nozzles communicating the discharge from said blower with said primary combustion chamber, said nozzles are oriented to direct air into the flame area of the combustion chamber and substantially away from the area occupied by the access means, an afterburner chamber located adjacent said primary chamber, regulatable burner means adapted to supply air and fuel into said afterburner chamber, exhaust means communicating with said afterburning chamber and adapted to exhaust effluent gases therefrom, passageway means interconnecting the upper portion of said primary chamber with the lower portion of said afterburner chamber to direct the off-gases from said primary chamber to said afterburner chamber, said passageway means including restriction means associated therewith to control the velocity of the off-gases through said passageway whereby substantially all of the particulate material is caused to settle from said off-gases prior to entry in said afterburner chamber, and control means adapted to regulate said burner means to maintain a predetermined temperature in said afterburner chamber whereby essentially complete combustion of combustibles remaining in said off-gases occurs in said afterburner chamber.

Claim 14

The incinerator of claim 6 wherein said restriction means are sized to control the residence time in said passageway.

Claim 15

A refuse incinerator to effect substantially complete combustion of solid waste materials, said incinerator comprising: a substantially rectangular burning compartment having top, bottom, side and end walls, a first vertical wall extending in said compartment between said side walls and terminating below said top wall and defining with one end wall a primary chamber, an access door in said compartment for charging waste fuel materials in said main burning chamber, a blower, an air distributor system for introducing air into said main burning chamber connected to said blower, said air distribution system including air nozzles directed into the flame area within said primary chamber, a second vertical wall in said compartment spaced apart from said first wall and defining a passageway therebetween, said second wall extending between the side walls from the top of the chamber and terminating above the compartment bottom and defining with said other end wall an afterburner chamber whereby effluent gases from said main chamber are introduced near the bottom of said afterburner chamber, exhaust stack means communicating with the top of said afterburner chamber and adapted to carry away the exhaust gases from said afterburner chamber, burner means adapted to introduce fuel and air into said afterburner chamber through discharge nozzle means located in the bottom of said afterburner, and regulator means adapted to regulate said burner to vary the air/fuel ratio to maintain the temperature in the afterburner in a predetermined range, whereby off-gases from said main chamber are introduced perpendicularly to the burner discharge in said afterburner and said burner effects substantially complete combustion of combustibles in said off-gases.

Claim 16

A refuse incinerator to effect substantially complete combustion of solid waste materials, said incinerator comprising: a substantially rectangular burning compartment having top, bottom, side and end walls, a first vertical wall extending in said compartment between said side walls and terminating below said top wall and defining with one end wall a primary chamber, an access door in said compartment for charging waste fuel materials in said main burning chamber, a blower, an air distributor system for introducing air into said main burning chamber connected to said blower, said air distribution system including air nozzles directed into the flame area within said primary chamber, a second vertical wall in said compartment spaced apart from said first wall and defining a passageway therebetween, said second wall extending between the side walls from the top of the chamber and terminating above the compartment bottom and defining with said other end wall an afterburner chamber whereby effluent gases from said main chamber are introduced near the bottom of said afterburner chamber, exhaust stack means communicating with the top of said afterburner chamber and adapted to carry away the exhaust gases from said afterburner chamber, burner means adapted to introduce fuel and air into said afterburner chamber through discharge nozzle means located in the bottom of said afterburner, and regulator means adapted to regulate said burner to vary the air/fuel ratio to maintain the temperature in the afterburner in a predetermined range, whereby off-gases from said main chamber are introduced perpendicularly to the burner discharge in said afterburner and said burner effects substantially complete combustion of combustibles in said off-gases.

Claim 17

The apparatus of claim 11 wherein said burner nozzle discharge is directed upwardly and is adapted to induce an up-flow of gases in said afterburner chamber.

Claim 18

The apparatus of claim 11 wherein an abutment is provided on the compartment bottom subjacent the terminal end of said second wall adapted to reduce entrainment of particulate matter to said afterburning chamber.

Claim 19

The apparatus of claim 11 wherein said burner is a gas burner and said air/fuel ratio is varied by varying the amount of gas supplied to the afterburner chamber.

Claim 20

A refuse incinerator for the substantially complete combustion of solid waste fuels, said incinerator comprising: a substantially rectangular burning compartment having top, bottom, side anD end walls, a first vertical wall extending upwardly in said compartment between said side walls and terminating below said top walls and defining with one end wall a primary burning chamber, an access door in said compartment opening into said primary burning chamber for charging waste fuel into said primary chamber, a blower discharging into an air distribution box, an air distribution system connecting with said air distribution box, said air distribution system having ducts extending to the top and opposite side walls of said primary chamber, nozzle arrangement means connecting with said duct means and adapted to discharge air into the flame area of the primary chamber to support combustion therein, said nozzle arrangement means including a first bank arranged in the top wall, a second bank in one side wall extending around three sides of said access door, and a third bank in said other side wall arranged with a horizontally and a vertically extending row, said third bank having preselected nozzles directed to discharge away from the opposite access door opening, a second vertical wall in said compartment spaced apart from said first wall and defining a flow passageway therebetween, said second wall extending between the compartment side walls from the top of the chamber and terminating above the compartment bottom and defining an afterburner chamber with the other end wall, abutment means located subjacent the terminal end of said second wall, an exhaust stack communicating with the top of said afterburning chamber and adapted to carry away the exhaust gases from said chamber, gas burner means having a nozzle means in the bottom discharging vertically upwardly into the afterburner chamber to support combustion therein, valve means associated with said burner adapted to regulate the ratio of fuel and air discharged into said afterburner chamber, regulator means controlling said valve means in response to the temperature in afterburner chamber to maintain said temperature in a predetermined range whereby off-gases from said main chamber are caused to flow through said passageway and are introduced perpendicularly to the burner in said afterburner to effect substantially complete combustion of combustibles in said off-gases.

Claim 21

A refuse incinerator for the substantially complete combustion of solid waste fuels, said incinerator comprising: a substantially rectangular burning compartment having top, bottom, side anD end walls, a first vertical wall extending upwardly in said compartment between said side walls and terminating below said top walls and defining with one end wall a primary burning chamber, an access door in said compartment opening into said primary burning chamber for charging waste fuel into said primary chamber, a blower discharging into an air distribution box, an air distribution system connecting with said air distribution box, said air distribution system having ducts extending to the top and opposite side walls of said primary chamber, nozzle arrangement means connecting with said duct means and adapted to discharge air into the flame area of the primary chamber to support combustion therein, said nozzle arrangement means including a first bank arranged in the top wall, a second bank in one side wall extending around three sides of said access door, and a third bank in said other side wall arranged with a horizontally and a vertically extending row, said third bank having preselected nozzles directed to discharge away from the opposite access door opening, a second vertical wall in said compartment spaced apart from said first wall and defining a flow passageway therebetween, said second wall extending between the compartment side walls from the top of the chamber and terminating above the compartment bottom and defining an afterburner chamber with the other end wall, abutment means located subjacent the terminal end of said second wall, an exhaust stack communicating with the top of said afterburning chamber and adapted to carry away the exhaust gases from said chamber, gas burner means having a nozzle means in the bottom discharging vertically upwardly into the afterburner chamber to support combustion therein, valve means associated with said burner adapted to regulate the ratio of fuel and air discharged into said afterburner chamber, regulator means controlling said valve means in response to the temperature in afterburner chamber to maintain said temperature in a predetermined range whereby off-gases from said main chamber are caused to flow through said passageway and are introduced perpendicularly to the burner in said afterburner to effect substantially complete combustion of combustibles in said off-gases.

Claim 22

The incinerator of claim 15 wherein said incineration compartment is a refractory lined steel shell.

Claim 23

The incinerator of claim 15 wherein the blower and air distribution box are located on the exterior of the compartment top wall.

Claim 24

The incinerator of claim 15 wherein said exhaust stack is provided with spark emission control means.

Claim 29

The method of claim 20 wherein said air volume flow and fuel and said off-gases flow is turbulent in said second zone thereby enhancing mixing and reducing the radiation effects to the chamber walls.

Claim 30

The method of claim 19 wherein the air rate to said primary zone is constant and is directed therein by a plurality of nozzles discharging into the flame zone.

Claim 31

The method of claim 20 wherein said air fuel supply is regulated by altering the rate of gas flow inversely in response to the exhaust gas temperature to maintain the temperature in a predetermined range.

Claim 32

The method of claim 23 wherein said predetermined temperature range is from 1,400* F. to 2,200* F.

Claim 33

The method of claim 24 wherein the velocity of the off-gases in said passageway is regulated to about from 6 to 9 fps.

Claim 36

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, temperature sensor means in said secondary chamber, regulator means connected to said sensor means for controlling the rate of operation of said burner means in response to the temperature in said secondary chamber, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature in said secondary chamber, and a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber.

Claim 37

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, temperature sensor means in said secondary chamber, regulator means connected to said sensor means for controlling the rate of operation of said burner means in response to the temperature in said secondary chamber, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature in said secondary chamber, and a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber.

Claim 38

In combination, an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone to said secondary chamber, the improvement which comprises: temperature sensor means in said secondary chamber, and regulator means connected to said sensor means for controlling the rate of operation of said burner means in response to the temperature in said secondary chamber, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature in said second chamber.

Claim 39

In combination, an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone to said secondary chamber, the improvement which comprises: temperature sensor means in said secondary chamber, and regulator means connected to said sensor means for controlling the rate of operation of said burner means in response to the temperature in said secondary chamber, said regulator means adapted to regulate the rate of fuel supply to the secondary chamber to maintain a predetermined temperature in said second chamber.

Claim 40

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary Combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases in a vertically downward direction from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases in said passageway within predetermined limits to effect settling in said passageway of particulate matter from the gases.

Claim 41

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary Combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases in a vertically downward direction from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases in said passageway within predetermined limits to effect settling in said passageway of particulate matter from the gases.

Claim 42

An incinerator as defined in claim 29 additionally comprising abutment means located in said passageway to reduce entrainment of particulate matter to said secondary chamber.

Claim 43

An incinerator as defined in claim 29 wherein the flow of off-gases in said secondary chamber is vertically upward.

Claim 44

An incinerator as defined in claim 29 wherein said means associated with said passageway is a restricted flow path in said gas flow between said primary chamber and said passageway.

Claim 45

An incinerator as defined in claim 32 wherein said means associated with said passageway additionally comprises a restricted flow path in said gas flow between said passageway and said secondary chamber.

Claim 46

In combination with an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, the improvement which comprises a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases in a vertically downward direction from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases in said passageway within predetermined limits to effect settling in said passageway of particulate matter from the gases.

Claim 47

In combination with an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, the improvement which comprises a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases in a vertically downward direction from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to control the said velocity of said gases in said passageway within predetermined limits to effect settling in said passageway of particulate matter from the gases.

Claim 48

An incinerator as defined in claim 34 additionally comprising abutment means located in said passageway to reduce entrainment of particulate matter to said secondary chamber.

Claim 49

An incinerator as defined in claim 34 wherein the flow of off-gases in said secondary chamber is vertically upward.

Claim 50

An incinerator as defined in claim 34 wherein said means associated with said passageway is a restricted flow path in said gas flow between said primary chamber and said passageway.

Claim 51

An incinerator as defined in claim 37 wherein said means associated with said passageway additionally comprises a restricted flow path in said gas flow between said passageway and said secondary chamber.

Claim 52

An incinerator comprising: a primary combustion chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, and a plurality of nozzles communicating with said blower means, said nozzles adapted to direct a flow of air at the exit from said primary chamber substantially perpendicular to flow of off-gases.

Claim 53

An incinerator comprising: a primary combustion chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, and a plurality of nozzles communicating with said blower means, said nozzles adapted to direct a flow of air at the exit from said primary chamber substantially perpendicular to flow of off-gases.

Claim 54

In combination with an incinerator having a primary combustion chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said first chamber to the burner zone in said second chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, the improvement which comprises a plurality of nozzles communicating with said blower means, said nozzles adapted to direct a flow of air at the exit from said primary chamber substantially perpendicular to flow Of off-gases.

Claim 55

In combination with an incinerator having a primary combustion chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said first chamber to the burner zone in said second chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, the improvement which comprises a plurality of nozzles communicating with said blower means, said nozzles adapted to direct a flow of air at the exit from said primary chamber substantially perpendicular to flow Of off-gases.

Claim 56

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to mix said gases in said passageway whereby proper combustion is maintained.

Claim 57

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway adapted to mix said gases in said passageway whereby proper combustion is maintained.

Claim 58

An incinerator as defined in claim 41 wherein said means associated with said passageway is a restricted flow path in said gas flow between said primary chamber and said passageway.

Claim 59

In combination with an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, the improvement which comprises means associated with said passageway adapted to mix said gases in said passageway whereby proper combustion is maintained.

Claim 60

In combination with an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, the improvement which comprises means associated with said passageway adapted to mix said gases in said passageway whereby proper combustion is maintained.

Claim 61

An incinerator as defined in claim 43 wherein said means associated with said passageway is a restricted flow path in said gas flow between said primary chamber and said passageway.

Claim 62

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway and said secondary chamber adapted to mix said gases entering said secondary chamber as said gases leave said passageway whereby proper combustion is maintained.

Claim 63

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, and means associated with said passageway and said secondary chamber adapted to mix said gases entering said secondary chamber as said gases leave said passageway whereby proper combustion is maintained.

Claim 64

An incinerator as defined in claim 45 wherein said means associated with said passageway comprises a restricted flow path in said gas flow between said passageway and said secondary chamber.

Claim 65

In combination with an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, the improvement which comprises means associated with said passageway and said secondary chamber adapted to mix said gases entering said secondary chamber as said gases leave said passageway whereby proper combustion is maintained.

Claim 66

In combination with an incinerator having a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases from said primary chamber to the burner zone in said secondary chamber, the improvement which comprises means associated with said passageway and said secondary chamber adapted to mix said gases entering said secondary chamber as said gases leave said passageway whereby proper combustion is maintained.

Claim 67

An incinerator as defined in claim 47 wherein said means associated with said passageway comprises a restricted flow path in said gas flow between said passageway and said secondary chamber.

Claim 68

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, temperature sensor means for measuring the temperature in said secondary chamber, regulator means connected to said temperature sensor means for controlling the rate of operation of said burner means in response to the temperature in said secondary chamber, said regulator means adapted to regulate the rate of fuel supply to the secondary cHamber to maintain a predetermined temperature in said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases in a vertically downward direction from said first chamber to the burner zone in said second chamber, and means associated with said passageway adapted to control the said velocity of said gases in said passageway within predetermined limits to effect settling of particulate matter from the gases.

Claim 69

An incinerator comprising: a primary combustion chamber, blower means adapted to direct a supply of air in excess of that required for combustion into said primary chamber, a secondary combustion chamber, burner means for supplying fuel into said secondary chamber, temperature sensor means for measuring the temperature in said secondary chamber, regulator means connected to said temperature sensor means for controlling the rate of operation of said burner means in response to the temperature in said secondary chamber, said regulator means adapted to regulate the rate of fuel supply to the secondary cHamber to maintain a predetermined temperature in said secondary chamber, a passageway interconnecting said primary and secondary chambers and adapted to conduct the off-gases in a vertically downward direction from said first chamber to the burner zone in said second chamber, and means associated with said passageway adapted to control the said velocity of said gases in said passageway within predetermined limits to effect settling of particulate matter from the gases.