Incinerator systems

Claim 2

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber, a conduit interconnecting said ignition chamber and said upper combustion chamber, said conduit having a substantially smaller cross-sectional area than said chambers, said upper combustion chamber having substantially the same diameter as said medial ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, means for raising the floatable material to the surface of the liquid, means for agitating the surface of the liquid, said tank portion having an oulet, means for maintaining the agitated surface of the liquid at a predetermined level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, means for changing the direction of flow of the products of combustion upon entering the upper combustion chamber, means for supplying air to said combustion chamber adjacent said means for changing the direction of flow to support combustion therein, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said means for connecting said combustion chamber outlet to said gas scrubber including means for increasing the flow velocity of said products of combustion, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases.

Claim 3

An incinerator system comprising, in combination, an incinerator member having a lower tank portion for containing a liquid, means for supplying combustible scum-containing maTerial to said tank portion for flotation of said combustible material in a layer on said liquid, the surface of said liquid being in an agitated state, means for maintaining the agitated surface of said liquid in said lower tank portion at a predetermined level, means for discharging said fluid from said tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, burner means disposed in said ignition chamber for burning said combustible material, means for supplying combustion air to said ignition chamber to support said combustion, an upper independent combustion chamber of substantially the same diameter as the diameter of said medial ignition chamber, a conduit interconnecting said ignition chamber and said upper combustion chamber, said conduit having a substantially smaller cross-sectional area than said chambers, baffle means centrally disposed in the bottom of said upper combustion chamber for changing the direction of the products of combustion entering the combustion chamber, means for supplying combustion air to said combustion chamber adjacent said baffle means, means for discharging the products of combustion from said combustion chamber, a gas scrubber having a lower outlet for discharging particulate matter and an upper exhaust stack for discharging exhaust gases, means for transferring said products of combustion discharged from said combustion chamber to said gas scrubber, said last named means including means for cooling and increasing the velocity of said products of combustion.

Claim 4

An incinerator system comprising, in combination, an incinerator member having a lower tank portion for containing a liquid, means for supplying combustible scum-containing maTerial to said tank portion for flotation of said combustible material in a layer on said liquid, the surface of said liquid being in an agitated state, means for maintaining the agitated surface of said liquid in said lower tank portion at a predetermined level, means for discharging said fluid from said tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, burner means disposed in said ignition chamber for burning said combustible material, means for supplying combustion air to said ignition chamber to support said combustion, an upper independent combustion chamber of substantially the same diameter as the diameter of said medial ignition chamber, a conduit interconnecting said ignition chamber and said upper combustion chamber, said conduit having a substantially smaller cross-sectional area than said chambers, baffle means centrally disposed in the bottom of said upper combustion chamber for changing the direction of the products of combustion entering the combustion chamber, means for supplying combustion air to said combustion chamber adjacent said baffle means, means for discharging the products of combustion from said combustion chamber, a gas scrubber having a lower outlet for discharging particulate matter and an upper exhaust stack for discharging exhaust gases, means for transferring said products of combustion discharged from said combustion chamber to said gas scrubber, said last named means including means for cooling and increasing the velocity of said products of combustion.

Claim 5

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous flotatable materials contained in a liquid, said tank portion having an outlet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said system further comprising a baffle mounted on the bottom of said combustion chamber to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular open-topped passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, and wherein said means for supplying air to said combustion chamber to support combustion therein includes combustion air jets mounted around the periphery of the combustion chamber to direct air into said annular passage.

Claim 6

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous flotatable materials contained in a liquid, said tank portion having an outlet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said system further comprising a baffle mounted on the bottom of said combustion chamber to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular open-topped passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, and wherein said means for supplying air to said combustion chamber to support combustion therein includes combustion air jets mounted around the periphery of the combustion chamber to direct air into said annular passage.

Claim 7

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an oulet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage, interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said combustion chamber hAving an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said ignition chamber having a shallow dome-shaped upper wall, a connecting passage interconnecting said ignition chamber and said combustion chamber having a substantially reduced diameter with respect to the diameter of said ignition chamber and said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an open-topped annular passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage.

Claim 8

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an oulet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage, interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said combustion chamber hAving an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said ignition chamber having a shallow dome-shaped upper wall, a connecting passage interconnecting said ignition chamber and said combustion chamber having a substantially reduced diameter with respect to the diameter of said ignition chamber and said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an open-topped annular passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage.

Claim 9

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an outlet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said ignition chamber having a shallow dome-shaped upper wall, a connecting passage interconnecting said ignition chamber with said combustion chamber having a substantially reduced diameter with respect to the diameter of said ignition chamber and said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage, an annular header for supplying air to said combustion air jets, said annular header having an inlet connected to a distributing valve, means for adjusting said distributing valve to maintain a volume of air flow through said combustion jets to maintain said combustion chamber at a temperature of the order of from about 1200* to about 1600*F.

Claim 10

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an outlet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said ignition chamber having a shallow dome-shaped upper wall, a connecting passage interconnecting said ignition chamber with said combustion chamber having a substantially reduced diameter with respect to the diameter of said ignition chamber and said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage, an annular header for supplying air to said combustion air jets, said annular header having an inlet connected to a distributing valve, means for adjusting said distributing valve to maintain a volume of air flow through said combustion jets to maintain said combustion chamber at a temperature of the order of from about 1200* to about 1600*F.

Claim 11

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow commmunication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an outlet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said comBustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said combustion chamber having an outlet of reduced diameter with respect to the diameter of the combustion chamber for discharging the products of combustion, a discharge adaptor mounted on the outlet of said combustion chamber, an elbow connected to said discharge adaptor, a butterfly valve mounted within said elbow, a quencher connected to said elbow for cooling and increasing the velocity of the moving gases, a transfer conduit connected to said quencher, a fan connected to said transfer conduit, a gas scrubber, an entrance duct interconnecting said fan and said gas scrubber.

Claim 12

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow commmunication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an outlet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, means for supplying air to said combustion chamber to support combustion therein, said comBustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate material and an upper exhaust stack for discharging exhaust gases; said combustion chamber having an outlet of reduced diameter with respect to the diameter of the combustion chamber for discharging the products of combustion, a discharge adaptor mounted on the outlet of said combustion chamber, an elbow connected to said discharge adaptor, a butterfly valve mounted within said elbow, a quencher connected to said elbow for cooling and increasing the velocity of the moving gases, a transfer conduit connected to said quencher, a fan connected to said transfer conduit, a gas scrubber, an entrance duct interconnecting said fan and said gas scrubber.

Claim 13

In an incinerator system having a lower tank, a medial ignition chamber mounted in fluid flow communication with said tank, an upper combustion chamber, a passage of reduced diameter interconnecting said ignition chamber with said combustion chamber, a baffle mounted in the bottom portion of said combustion chamber, a method of burning scum comprising the steps of supplying liquid containing combustible material to said lower tank, maintaining a preselected level of fluid in said tank, allowing said scum to rise to the surface of said liquid, agitating the scum on the surface of said liquid, introducing air at a plurality of locations to said ignition chamber disposed adjacent said tank in fluid flow communication therewith, igniting said combustible material, directing the products of combustion from said ignition chamber through said passage of reduced diameter and thence against the baffle mounted in the bottom of the combustion chamber to direct the products of combustion radially outwardly in the bottom of said combustion chamber, introducing air for combustion to said combustion chamber adjacent said baffle, and withdrawing the products of combustion from said combustion chamber.

Claim 14

In an incinerator system having a lower tank, a medial ignition chamber mounted in fluid flow communication with said tank, an upper combustion chamber, a passage of reduced diameter interconnecting said ignition chamber with said combustion chamber, a baffle mounted in the bottom portion of said combustion chamber, a method of burning scum comprising the steps of supplying liquid containing combustible material to said lower tank, maintaining a preselected level of fluid in said tank, allowing said scum to rise to the surface of said liquid, agitating the scum on the surface of said liquid, introducing air at a plurality of locations to said ignition chamber disposed adjacent said tank in fluid flow communication therewith, igniting said combustible material, directing the products of combustion from said ignition chamber through said passage of reduced diameter and thence against the baffle mounted in the bottom of the combustion chamber to direct the products of combustion radially outwardly in the bottom of said combustion chamber, introducing air for combustion to said combustion chamber adjacent said baffle, and withdrawing the products of combustion from said combustion chamber.

Claim 15

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank having an oulet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said igntion ignition a connecting passage interconnecting said ignition chamber with said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular passage in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage.

Claim 16

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank having an oulet, means for controlling the liquid level in said tank, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said igntion ignition a connecting passage interconnecting said ignition chamber with said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular passage in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage.

Claim 17

An incinerator system according to claim 8, wherein said combustion air jets are mounted at an angle with respect to the radius of said combustion chamber, and further including an annular header for supplying air to said combustion air jets, said annular header having an inlet connected, and means for supplying air to said inlet.

Claim 18

An incinerator system according to claim 8, further comprising an annular header for supplying air to said combustion air jets, said annular header having an inlet, a distributing valve connected to said inlet, means for adjusting said distributing valve to maintain a volume of air flow through said combustion air jets to maintain said combustion chamber at a temperature of the order of from about 1200* to about 1600*F.

Claim 19

An iNcinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials maintained in a liquid, said tank portion having an oulet, means for controlling the liquid level in said tank portion, means for agitating the material on the surface of said liquid, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular open-topped passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage, means for supplying air to said annular passage, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate matter and an upper exhaust stack for discharging exhaust gases.

Claim 20

An iNcinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials maintained in a liquid, said tank portion having an oulet, means for controlling the liquid level in said tank portion, means for agitating the material on the surface of said liquid, ignition burners mounted on the wall of said ignition chamber, means for supplying air to support combustion in said ignition chamber, a connecting passage interconnecting said ignition chamber with said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular open-topped passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of said combustion chamber to direct air into said annular passage, means for supplying air to said annular passage, said combustion chamber having an outlet for discharging the products of combustion, a gas scrubber, means for connecting said combustion chamber outlet to said gas scrubber in fluid flow communication, said gas scrubber having a lower outlet for discharging particulate matter and an upper exhaust stack for discharging exhaust gases.

Claim 21

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an outlet, a substantially vertically disposed conduit connected to said outlet, a drain pipe connected to said conduit, valve means mounted in said conduit to control the flow of liquid to said drain pipe, thereby controlling the liquid level in said conduit and said tank, a transverse shaft mounted in said tank adjacent the surface of said liquid, fingers mounted on said shaft, means for rotating said shaft and fingers for agitating the material on the surface of said liquid, ignition burners mounted on the wall of said ignition chamber and angularly directed at an agle of about 45* toward the liquid surface, a plurality of air jets mounted around the periphery of said ignition chamber adjacent said liquid surface, an annular header for supplying air to said jets, said annular header having an inlet connected to a distributing valve, a combustion air fan for feeding air to said distributing valve, secondary air jets mounted around the periphery of the ignition chamber towards the upper end thereof, a second annular header for feeding said secondary air jets, said secondary annular header having an inlet connected to said distributing valve, the pressure of said secondary air being substantially lower than that of said primary air, said ignition chamber having a shallow dome-shaped upper wall, a connecting passage interconnecting said ignition chamber with said combustion chamber having a substantially reduced diameter with respect to the diameter of said ignition chamber and said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular open-topped passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of the combustion chamber to direct air into said annular passage at an angle with respect to the radius, an annular header for supplying air to said combustion air jets, said annular header having an inlet connected to said distributing valve, means for adjusting said distributing valve to maintain a volume of air flow through said combustion jets to maintain said combustion chamber at a temperature of the order of from about 1200* to about 1600* F, said combustion chamber having a shallow dome-shaped upper wall, said combustion chamber having an outlet of reduced diameter with respect to the diameter of the combustion chamber for discharging the products of combustion, a discharge adaptor mounted on the outlet of said combustion chamber, a 90* elbow connected to said discharge adaptor, a butterfly valve mounted in said 90* elbow, a quencher connected to said elbow for cooling and increasing the velocity of the moving gases, a transfer conduit connected to said quencher, a fan connected to said transfer conduit, a cylindrical gas scrubber, an entrance duct interconnecting said fan and said cylindrical gas scrubber, said gas scrubber having a lower outlet for discharging particulate matter and an upper exhaust stack for discharging exhaust gases.

Claim 22

An incinerator system comprising an incinerator member having a lower tank portion, a medial ignition chamber mounted in fluid flow communication with said tank portion, and an upper combustion chamber mounted in fluid flow communication with said ignition chamber, said lower tank having an inlet for receiving a continuous flow of oleaginous floatable materials contained in a liquid, said tank portion having an outlet, a substantially vertically disposed conduit connected to said outlet, a drain pipe connected to said conduit, valve means mounted in said conduit to control the flow of liquid to said drain pipe, thereby controlling the liquid level in said conduit and said tank, a transverse shaft mounted in said tank adjacent the surface of said liquid, fingers mounted on said shaft, means for rotating said shaft and fingers for agitating the material on the surface of said liquid, ignition burners mounted on the wall of said ignition chamber and angularly directed at an agle of about 45* toward the liquid surface, a plurality of air jets mounted around the periphery of said ignition chamber adjacent said liquid surface, an annular header for supplying air to said jets, said annular header having an inlet connected to a distributing valve, a combustion air fan for feeding air to said distributing valve, secondary air jets mounted around the periphery of the ignition chamber towards the upper end thereof, a second annular header for feeding said secondary air jets, said secondary annular header having an inlet connected to said distributing valve, the pressure of said secondary air being substantially lower than that of said primary air, said ignition chamber having a shallow dome-shaped upper wall, a connecting passage interconnecting said ignition chamber with said combustion chamber having a substantially reduced diameter with respect to the diameter of said ignition chamber and said combustion chamber, a baffle mounted on the bottom of said combustion chamber encompassing the upper end of said connecting passage to direct the products of combustion entering the combustion chamber in a radial flow pattern, said baffle forming an annular open-topped passage with a shallow dish-shaped lower wall in the bottom of said combustion chamber, combustion air jets mounted around the periphery of the combustion chamber to direct air into said annular passage at an angle with respect to the radius, an annular header for supplying air to said combustion air jets, said annular header having an inlet connected to said distributing valve, means for adjusting said distributing valve to maintain a volume of air flow through said combustion jets to maintain said combustion chamber at a temperature of the order of from about 1200* to about 1600* F, said combustion chamber having a shallow dome-shaped upper wall, said combustion chamber having an outlet of reduced diameter with respect to the diameter of the combustion chamber for discharging the products of combustion, a discharge adaptor mounted on the outlet of said combustion chamber, a 90* elbow connected to said discharge adaptor, a butterfly valve mounted in said 90* elbow, a quencher connected to said elbow for cooling and increasing the velocity of the moving gases, a transfer conduit connected to said quencher, a fan connected to said transfer conduit, a cylindrical gas scrubber, an entrance duct interconnecting said fan and said cylindrical gas scrubber, said gas scrubber having a lower outlet for discharging particulate matter and an upper exhaust stack for discharging exhaust gases.