US3626873A

US3626873A - Continuously fired batch-type incineration

Info

Publication number: US3626873A
Application number: US40293A
Authority: US
Inventors: Richard F Stockman; William M Anderson
Original assignee: Air Preheater Co Inc
Current assignee: Enercon Systems Inc
Priority date: 1970-05-22
Filing date: 1970-05-22
Publication date: 1971-12-14
Anticipated expiration: 1988-12-14
Also published as: ES391390A1; GB1323816A; ZA713285B; DE2121562A1; NL7107002A; FR2093566A5

Abstract

A ''''batch''''-type incinerator that may be continuously loaded and fired to effect continuous incineration of waste material. The incinerator defined therefore has the advantages of both the ''''batch'''' and ''''continuously'''' loaded incinerators without the inherent disadvantages of either type.

Description

Maite@ Slm-tes Patent [72] lnventors Richard F. Stockman Friendship; William M. Anderson, Wellsvllle, both of N.Y. [2l] Appl. No. 40,293 [22] Filed May 22, 1970 [45] Patented Dec. 14, 1971 [73] Assignee The Air Preheeter Company, lne.

Wellsville, N.Y.

[54] CONTINUOUSLY FIRED BATCH-TYPE INCENERATION 2 Claims, 2 Drawing Figs.

[52] ELS. Cl. 110/8 R, 110/8 A, ll0/l8 R [5l] int. Cl. F233 5/00 A l l la O 2? 22 [50] Field ofSearch llO/7, 8, l5, i8

[56] References Cited UNITED STATES PATENTS 661,463 ll/l900 Wilkie 110/8 1,603,589 l0/l926 Felton, Jr. l 10/8 1,974,250 9/1934 Osborn l l0/15 Primary Examiner-Kenneth W. Sprague Attorneys-Wayne H. Lang and Eldon H. Luther ABSTRACT: A batchtype incinerator that may be continuously loaded and red to effect continuous incineration of waste material. The incinerator defined therefore has the advantages of both the batch and continuously" loaded incinerators without the inherent disadvantages of either type.

CONTINUOUSLY F IRED BATCH-TYPE INCINERATION BACKGROUND OF THE INVENTION l. Field of the Invention This invention relates to an improved batch"type incinerator where the incinerator is charged with a given amount of refuse or waste to be burned, ignited, and then burned o' completely before the incinerator is opened to the atmosphere, a new charge place therein, and the process repeated.

2. Description of the Prior Art Batchtype incinerators of the prior art were simple to use, their original cost and the cost of operation were relatively low, and they did not require the continuous attendance of an operator. Therefore they were at first quite desirable from an operational standpoint. However, in addition to these desirable characteristics of a typical batchtype incinerator were the undesirable characteristics that such units had a relatively small capacity and they required complete cooling between the firing of separate batches." Accordingly they were slow in operation and thus suitable only for small operations. Moreover, if the incinerator was opened for feeding and air allowed to freely enter the incinerator through an open feeding door, the cycle of operation would be broken and improper combustion would result in excess smoke and poor l eliminations.

A natural step in the development of an effective incinerator was the development of a continuous feed"type incinerator which had a greater capacity together with effective incineration. However this type of continuous feed too encountered other problems, not the least of which was economic in that a skilled operator was required to be in constant attendance to insure satisfactory operation.

SUMMARY OF THE INVENTION The present invention is therefore directed to a "batch"- type incinerator that may be operated continuously. It is readily adapted for loads of various characteristics and it will operate properly and effectively without the continuous presence of a skilled operator. DESCRIPTION OF THE DRAWING A more complete understanding of our invention may be realized by referring to the following description in conjunction with the accompanying drawings in which:

FIG. l is a schematic side elevation showing an incinerator arrangement having multiple loading chambers and a single exhaust stack.

FIG. 2 is an example of an alternate arrangement utilizing multiple loading chambers and a single exhaust stack.

IN THE SPECIFICATION ln the drawings the incinerator comprises a housing having a closed combustion chamber 12 with a loading port at one end through which waste may be loaded and an outlet port 16 through which gases generated therein may flow on their exhaust to the atmostphere.

The combustion chamber 12 generally comprises an outer jacket I8 of steel with an inner coating 22 of insulating material capable of standing up at temperatures of 2500 F.

A charging door 24 is provided to tightly seal the loading opening whereby it may be opened widely for ease of loading and then tightly closed to preclude the flow of air therethrough when incineration is underway. The entire end 26 of the incinerator comprises a pivoted door that may be opened widely to permit repair of the housing or to provide for the removal of ashes resulting from the incineration process.

The outlet port 16 is connected to a branch of an inverted T"shaped outlet duct 20 housing a secondary combustion chamber 36. A source of fuel 44 and air 3l together with an independent ignition means 48 is provided to initiate and sustain the combustion gases produced in either housing by the combustion of waste therein under less than stoichiometric conditions. An outlet stack 38 is secured to the upright branch of duct 20 to vent the exhaust gases into the atmosphere.

The source of air 46 is provided whereby air for combustion may be supplied via ducts 30 to apertured undertire tubes 32 and via duct 3l to the secondary combustion chamber. The inverted T"shaped outlet duct 20 enclosing the secondary combustion chamber 36 is secured to the housing at outlet 16 whereby all gases generated in the chambers l2 or 12A are forced to traverse the combustion chamber and then exhaust to the atmosphere through outlet stack 38.

Air for combustion of gas in chamber 36 is supplied thereto via duct 3l, while gas or other fuel is supplied via duct 44 and then ignited by ignition means 48 so that a predetermined temperature is maintained at thermocouple 52 in the secondary combustion chamber and at thermocouple 54 in the stack.

In accordance with this invention a second housing 10A enclosing a chamber 12A is provided with an outlet port connected to the secondary combustion chamber 36. The chamber 12A is provided with a loading port 24A and a cleanout door 26A similar to that provided for chamber l2 at 24 and 26. An apertured air inlet duct 32A provides underfire combustion air to chamber 12A from the same source 46 as that which supplies combustion air to chamber I2. Valves 76 and 78 in the air supply lines may be operated manually or by

thermocouple

54 and 56 in the stack to provide the combustion air necessary to support combustion of all gasses produced in the

primary combustion chambers

12 or 12A. Thermocouple 52 in chamber 36 controls the valve 82 for air from source 46 insuring continuous combustion of exhaust gases in the secondary chamber.

FIG. 2 shows a slightly modified arrangement whereby the primary chambers 13 and 13A are arranged in a spaced parallel relationship to permit loading said chambers alternately in accordance with the teachings of this invention.

Various other arrangements involving the use of multiple combustion chambers may be utilized without departing from the spirit of the invention. Thus the foregoing descriptive matter and drawings are to be interpreted as illustrative of the invention rather than as limiting the scope of the appended claims.

We claim:

l. Apparatus for the incineration of waste material comprising an incinerator housing enclosing a chamber with a loading port for the charging of waste material therein and an outlet port exhausting the products of combustion therefrom, an airtight closure door for the loading port, a branched outlet duct enclosing a secondary combustion chamber, means connect ing one branch of said duct to the outlet port of the incinerator chamber, a burner in said secondary combustion chamber including a source of fuel and air, an outlet stack, means connecting the outlet stack to a branch of said outlet duct, a second incinerator housing having loading and outlet ports, means connecting the outlet port of the second incinerator housing to a branch of said outlet duct, temperature responsive means in the outlet stack, and means igniting the burner in the secondary combustion chamber when the temperature in the outlet stack falls below a predetennined minimum.

2. Apparatus for the destruction of combustible waste material comprising a first incinerator housing enclosing a chamber having a loading port for the charging of waste material therein and an outlet port exhausting the products of combustion therefrom, an airtight closure door for the loading port, a T"shaped outlet duct enclosing a secondary combustion chamber, means connecting a branch of said duct to the outlet port of the first chamber, an outlet stack, means connecting the outlet stack to an essentially vertical branch of said outlet duct, a second incinerator housing having inlet and outlet ports, air supply means connected to the first and second incinerator housings, a single source of air connected to said air supply means, valve means controlling the flow of air through said air supply means to the first and second incinerator housings, temperature responsive means in the out let stack controlling said valve means, and means connecting the outlet port of the second incinerator to an independent branch of said outlet duct whereby the rst and second incinerators are simultaneously connected to the secondary combustion chamber of the outlet duct.

Claims

1. Apparatus for the incineration of waste material comprising an incinerator housing enclosing a chamber with a loading port for the charging of waste material therein and an outlet port exhausting the products of combustion therefrom, an airtight closure door for the loading port, a branched outlet duct enclosing a secondary combustion chamber, means connecting one branch of said duct to the outlet port of the incinerator chamber, a burner in said secondary combustion chamber including a source of fuel and air, an outlet stack, means connecting the outlet stack to a branch of said outlet duct, a second incinerator housing having loading and outlet ports, means connecting the outlet port of the second incinerator housing to a branch of said outlet duct, temperature responsive means in the outlet stack, and means igniting the burner in the secondary combustion chamber when the temperature in the outlet stack falls below a predetermined minimum.

2. Apparatus for the destruction of combustible waste material comprising a first incinerator housing enclosing a chamber having a Loading port for the charging of waste material therein and an outlet port exhausting the products of combustion therefrom, an airtight closure door for the loading port, a ''''T''''-shaped outlet duct enclosing a secondary combustion chamber, means connecting a branch of said duct to the outlet port of the first chamber, an outlet stack, means connecting the outlet stack to an essentially vertical branch of said outlet duct, a second incinerator housing having inlet and outlet ports, air supply means connected to the first and second incinerator housings, a single source of air connected to said air supply means, valve means controlling the flow of air through said air supply means to the first and second incinerator housings, temperature responsive means in the outlet stack controlling said valve means, and means connecting the outlet port of the second incinerator to an independent branch of said outlet duct whereby the first and second incinerators are simultaneously connected to the secondary combustion chamber of the outlet duct.