US3680500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage smokeless incinerator
Assignee: Phillips Petroleum Co
•
Filing: 1970-10-08
•
Granted: 1972-08-01
•
Expires: 1990-10-08
Abstract
Abstract Effective incineration of waste products of various types is obtained by means of a two-stage grateless incinerator including a first stage vaporization zone with burner and forced air supply, and a second stage combustion zone with burner and forced air supply. The two-stage vaporization-combustion incinerator provides effective oxidative incineration, with gaseous products being smokeless, and any non-vaporized non-combusted solid matter is essentially retained in the first stage vaporization chamber.
Inventors
- 👤 Robert C Pryor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:48
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/02; F23G5/027; F23G5/0276; F23G5/08; F23G5/14; F23G5/16; F23G2201/00; F23G2201/50
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
90 words
A smokeless, grateless, two-stage contiguous incinerator comprising: a. a first stage comprising a vaporization zone, at least one first burner, at least one forced air supply, inlet for waste materials, outlet for gaseous products, b. a second stage comprising a combustion zone, at least one second burner, at least one second forced air supply, entrance for receiving gaseous products from said first stage, outlet for combusted gaseous products from said second stage, c. connecting conduit for conducting vaporous products from said first stage to said second stage by confined means.
Claim 2
Dependent Claim
90 words
A smokeless, grateless, two-stage contiguous incinerator comprising: a. a first stage comprising a vaporization zone, at least one first burner, at least one forced air supply, inlet for waste materials, outlet for gaseous products, b. a second stage comprising a combustion zone, at least one second burner, at least one second forced air supply, entrance for receiving gaseous products from said first stage, outlet for combusted gaseous products from said second stage, c. connecting conduit for conducting vaporous products from said first stage to said second stage by confined means.
Claim 3
Dependent Claim
37 words
The incinerator according to claim 1 wherein at least one said first burner is directed in a substantially downward direction from the upper area of said first stage downwardly toward the lower area of said first stage.
Claim 4
Dependent Claim
21 words
The incinerator according to claim 2 wherein at least one said first burner is directed downwardly in a substantially vertical position.
Claim 5
Dependent Claim
26 words
The incinerator according to claim 2 wherein at least one said second burner is in a substantially vertical position directing flame upwardly into said second stage.
Claim 6
Dependent Claim
24 words
The incinerator according to claim 2 wherein at least one said second burner is directed in a substantially horizontal position into said second stage.
Claim 7
Dependent Claim
24 words
The incinerator according to claim 2 wherein the volumetric ratio of the first stage to the second stage is from 1:2.5 to 1: 6.
Claim 8
Dependent Claim
21 words
The incinerator according to claim 6 wherein the volumetric ratiO of the first stage to the second stage is about 1:3.
Claim 9
Dependent Claim
17 words
The incinerator according to claim 6 wherein said first stage is a trench of earth or rock.
Claim 10
Dependent Claim
33 words
The incinerator according to claim 8 wherein said trench first stage is covered with a double-wall structure open for passage therethrough of at least one of said first and second forced air supply.
Claim 11
Dependent Claim
23 words
The incinerator according to claim 6 wherein each said stage and said connecting conduit between said stages is lined with a refractory material.
Claim 12
Dependent Claim
25 words
The incinerator according to claim 10 wherein said vaporous effluent from said second stage is passed through a waste heat recovery unit prior to exhaustion.
Claim 13
Dependent Claim
31 words
The incinerator according to claim 6 wherein said waste products include solids, semi-solids, and liquids, and are selected from amongst garbage, rubber wastes, tire carcasses, oils, paper, plastics, and car bodies.
Claim 14
Independent Claim
112 words
A method of incinerating waste products comprising the steps of: a. vaporizing vaporizable components of said waste products in a first stage zone and substantially retaining therein non-vaporizable components of said waste products, b. conducting said vaporized components from said step (a) by confined means to a second stage, c. oxidatively combusting said vaporized components in said second stage in the presence of excess oxygen at an elevated temperature, and d. exhausting the products of oxidative combustion from said step (c) to the atmosphere, and thereby converting said waste products into non-vaporizable components essentially retained in said first stage and an essentially smokeless essentially fully oxidized vaporous effluent from said second stage.
Claim 15
Independent Claim
112 words
A method of incinerating waste products comprising the steps of: a. vaporizing vaporizable components of said waste products in a first stage zone and substantially retaining therein non-vaporizable components of said waste products, b. conducting said vaporized components from said step (a) by confined means to a second stage, c. oxidatively combusting said vaporized components in said second stage in the presence of excess oxygen at an elevated temperature, and d. exhausting the products of oxidative combustion from said step (c) to the atmosphere, and thereby converting said waste products into non-vaporizable components essentially retained in said first stage and an essentially smokeless essentially fully oxidized vaporous effluent from said second stage.
Claim 16
Dependent Claim
35 words
The process according to claim 13 wherein said vaporizing step (a) is accomplished by heat produced by the combustion of at least one of a fuel and at least a portion of said waste products.
Claim 17
Dependent Claim
48 words
The process according to claim 13 wherein said excess oxygen is supplied in the form of forced air to at least one of said steps (a) and (c), and said excess oxygen is substantially in excess of combustive requirements of said fuel to said steps (a) and (c).
Claim 18
Dependent Claim
20 words
The process according to claim 15 wherein the temperature in said vaporizing step (a) is from 200* to 2,400* F.
Claim 19
Dependent Claim
26 words
The process according to claim 16 wherein the temperature in said oxidative combustion step (c) is substantially higher than said temperature in said vaporizing step (a).
Claim 20
Dependent Claim
24 words
The process according to claim 17 wherein a volume ratio of said first stage to second stage is maintained at from 1:2.5 to 1:6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |