US3533364A

US3533364A - Flame fired incinerator

Info

Publication number: US3533364A
Application number: US751921A
Authority: US
Inventors: Ernest Bayne Blankenship
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-08-12
Filing date: 1968-08-12
Publication date: 1970-10-13
Anticipated expiration: 1987-10-13

Description

United States Patent [72] inventor Ernest Bayne Blankenship P. O. Box 3516-8, Irving. Texas 75235 [2|] AppLNo. 751,921 {22} Filed Aug. 12, 1968 [45] Patented Oct. 13. 1970 54] FLAME FIRED INCINERATOR 3 Claims, 4 Drawing Figs.

52 us. Cl 110/9 51] Int. CL. A47k I02 50} Field of Search I 10/8, 9

References Cited UNITED STATES PATENTS 3.020.559 2/1962 Blankenshipetal llU/9L'X 3 1391126 7/1964 Blankenship llU/9L'X 3.269497 2/1965 Blankenship i10/9L'X Primary Examiner-Kenneth W. Sprague Attorney-Herbert J. Brown ARB Patented Oct. 13, 1970 3,533,364

FIG. I.

FIG. 2.

' ERNEST BAYNE BLANKENSHIP IN\=ENTOR.

FLAME FIRED INCINERATOR ble. for example, in buses, planes, boats and construction 1 projects. However, the invention isnot lim ited to toilet s but includes other incinerators. for example, garbage disposal.

The purpose of the invention is to provide an efficient method of incinerating the waste material with a minimum production of odor and pollution to the outside air. Previously, this result has been obtained in some measure by taking the gaseous effluent resulting from the heating of the waste material and recirculating it through the flame to complete combustion and destroy foul odors. The presence of excess moisture in the form of steam often reduced the temperature of the flame and even extinguished it, and often at the end of the heating cycle, when the flame was off. there was still enough unconsumed gaseous effluent to produce an objectionable odor and noticeable pollution to the outside air.

An object of this invention 15 to provide a heat cycle that continues by latent radiation after the flame is turned down or off, assuring complete drying and incineration of the waste material.

Another object of the invention is to provide an enclosed flame source of heat which cannot be affected by the amount of moisture in the gaseous effluent.

Another object of the invention is to provide an incinerator in which the gaseous effluent is drawn through a heat activated catalyst whereby odors and other objectionable gases are destroyed before the effluent is released to the open air.

As hereinafter described, the flame is produced in a combustion chamber surrounding the waste material and the heat is transmitted to the latter and to the catalyst by radiation, the walls of the combustion chamber reaching temperatures in the l2QOF. range.

The objects and other advantages of the invention will become apparent from the following description and the accompanying drawing, in which:

FIG. I is a horizontal section through the incinerator cabinet. I

FIG. 2 is a vertical longitudinal section through the cabinet partly on the centerline of the combustion chamber and partly on the centerline of the vent pipe.

FIG. 3 is an enlarged sectional detail of the catalytic unit.

' F l6. 4 is a reduced scale plan view of the cabinet.

In the embodiment of the invention shown, a cylindrical combustion chamber is contained in an insulated cabinet or housing ll. A generally funnel shaped bowl 12 connects an opening in the top of the cabinet 11 with the combustion chamber 10 and is covered by a conventional toilet seat assembly 13. In the bottom of the cabinet 11 there is a removable ash pan 14 having a raised center bottomportion 15 to hold the solid waste to be incinerated away from the liquid portion which drains to the lower portion of the pan.

The cylindrical combustion chamber 10 includes an annulus 16 divided by a vertical partition 17. A gas burner 18 with a.

pilot 18a leads into the annulus 16 close to the partition 11 on one side and a vent pipe 19 leads out of the annulus 16 close to the other side of the partition 17 so that the heat from the burner 18 circulates around the entire combustion chamber. The annulus 16 is closed top and bottom by ring plates 20 and 21, respectively.

Heat from the inner surface of the combustion chamber 10 radiates concentrically toward any waste material resting on the center portion 15 of the ash pan l4 and also heats air in the induced downdraft within the cabinet. Heat from the outer surface of the combustion chamber 10 radiates toward an annularly disposedcatalytic unit 22 which may be comprised of alumina pellets 23 contained between an inner screen 24 and an outer screen 25 as shown in detail in FIG. 3. When heated. the catalytic unit 22 tends to complete the combustion of the hot effluent gases generated by the heat from the combustion chamber 10 acting on the waste material in the ash pan 14.

A An exterior vent pipe 26 collects the effluentgases from the annular passage 27 stimulatin the catal se iiriit 22 which have been drawn through the unit from the annular passage 28 between the combustion chamber 10 and the catalytic unit 22 as indicated by the arrows in FIG. 2, and the incoming draft of cold air. The lid 13 is protected from heat by the bowl 12.

The combustion chamber vent 19 also empties within the exterior vent pipe 26 with a venturi effect. Draft is induced in the exterior vent pipe 26 by a fan. not shown, or by convection if a long enough pipe 26 is available.

Gas is supplied to the burner 18 by a fuel line 29, and vent holes 30 in the cabinet 11 allow an adequate supply of air to the burner 18.

After use of the cabinet the incinerating cycle is started by depressing the pedal 31 which is attached to a control unit 32, and the cycle ends when thermostats, not shown, indicate that the waste material has been incinerated. v

The latent heat retained by the combustion chamber 10 and the catalytic unit 22 insures that any residual noxious gaseous effluent escaping from the incinerated waste after the flame is shut off will still receive a measure of purification. In previous incinerators in which the gases were purified 'by passing through the flame a considerable amount of smoke and odor often escaped when the flame was shut off.

The invention is not limited to the exemplary construction herein shown and described, but may be made in various ways closed combustion chamber comprised of inner and outer spaced circular walls, an ash pan said combustion chamber generally disposed above said ash pan, means for introducing waste into said ash pan, a burner extending into the annulus of said chamber, vent means connecting said chamber outwardly of said housing, a heat activated catalyst around and spaced from said combustion chamber and means communicating said catalyst with said vent means.

2. A flame fired. incinerator as defined in claim 1 and wherein said burner and said vent means are in substantially side by side relation and a partition in said chamber between said vent means and said burner.

3. A flame fired incinerator as defined in claim 1 and including a venturi type outlet in communication with the outer area of said catalyst and said vent means.