Patent US4023508A successfully refreshed from Google Patents.
US4023508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus to burn waste combustible polymers
Assignee: KGI Inc
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Filing: 1976-04-22
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Granted: 1977-05-17
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Expires: 1996-04-22
Abstract
Abstract Apparatus for burning waste polymers of selected combustion characteristics. A vertical or horizontal combustion assembly includes a base cylindrical portion having water-cooled walls to maintain a selected temperature by removal of the heat of combustion, a plurality of pipes for injecting combustion air tangentially into the interior space, a loading port in the wall of the base section and a burner for igniting the waste matter injected through the loading port. Downstream of the base section is a ceramic choke which has an axial opening therethrough of lesser diameter than an internal diameter of the base section followed by an afterburning chamber, which like the base section, has a plurality of air inlet pipes tangential to the chamber and a burner port for igniting vapors in the upper chamber. Combustion air is controlled so that less than stoichiometric air is injected into the lower chamber to provide a reducing atmosphere, with excess combustion air in the afterburning section. The outlet of the afterburning chamber goes to the stack.
Inventors
- 👤 Clifford J. Cantrell, Jr.
- 👤 Gary D. Hanlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:42
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/12; F23G5/00; F23G5/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
181 words
Apparatus for burning waste particulate matter, comprising: a. a cylindrical base portion, including; 1. double cylindrical walls and means to circulate water in at a bottom inlet and utilize steam at an upper outlet, and means to control the rate of water inflow, whereby a selected temperature can be maintained in said base portion; 2. means to inject solid particulate material of selected thermal and combustion characteristics at a port near the top of said base portion; 3. thermal insulating means over the base of said base portion adapted to support said particulate material; 4. burner means in said base section to ignite said particulate matter; 5. means to inject air under pressure, at a controlled rate for combustion of said particulate matter under reducing conditions, with less than stoichiometric air; b. an intermediate choke portion, mounted on top of said portion, said choke of refractory material, having a central opening of smaller diameter than the diameter of said base portion; c. an afterburner chamber on top of said choke portion; all three potions suitably fastened and sealed together and including;
Claim 2
Dependent Claim
181 words
Apparatus for burning waste particulate matter, comprising: a. a cylindrical base portion, including; 1. double cylindrical walls and means to circulate water in at a bottom inlet and utilize steam at an upper outlet, and means to control the rate of water inflow, whereby a selected temperature can be maintained in said base portion; 2. means to inject solid particulate material of selected thermal and combustion characteristics at a port near the top of said base portion; 3. thermal insulating means over the base of said base portion adapted to support said particulate material; 4. burner means in said base section to ignite said particulate matter; 5. means to inject air under pressure, at a controlled rate for combustion of said particulate matter under reducing conditions, with less than stoichiometric air; b. an intermediate choke portion, mounted on top of said portion, said choke of refractory material, having a central opening of smaller diameter than the diameter of said base portion; c. an afterburner chamber on top of said choke portion; all three potions suitably fastened and sealed together and including;
Claim 3
Dependent Claim
46 words
said afterburner chamber lined with refractory; 2. means to inject excess combustion air under pressure, to completely burn the gases formed in the partial combustion in said base portion; and d. stack means to conduct to the atmosphere the products of combustion in said afterburner chamber.
Claim 4
Dependent Claim
46 words
said afterburner chamber lined with refractory; 2. means to inject excess combustion air under pressure, to completely burn the gases formed in the partial combustion in said base portion; and d. stack means to conduct to the atmosphere the products of combustion in said afterburner chamber.
Claim 5
Dependent Claim
22 words
The apparatus as in claim 1 including burner means in said afterburner chamber to ignite said gases formed in said base portion.
Claim 6
Dependent Claim
21 words
The apparatus as in claim 1 including means to controllably inject steam into said afterburner chamber to control the temperature therein.
Claim 7
Dependent Claim
37 words
The apparatus as in claim 1 in which said means to inject air under pressure comprises a plurality of pipes through the wall of said base portion directed tangential to the interior volume of said base portion.
Claim 8
Dependent Claim
31 words
The apparatus as in claim 1 in which said means to inject air under pressure comprises a plurality of pipes through the wall of said afterburner chamber near the base thereof.
Claim 9
Dependent Claim
33 words
The apparatus as in claim 1 in which said particulate matter includes materials which melt at a temperature below burning temperature and form a liquid pool on the bottom of said base portion.
Claim 10
Dependent Claim
15 words
The apparatus as in claim 6 in which said waste particulate material comprises solid polymers.
Claim 11
Dependent Claim
19 words
The apparatus as in claim 7 in which polymers are in the class of polyethylene and thermo plastic rubbers.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |