US 4,038,032 AGranted

Method and means for controlling the incineration of waste

AssigneeUop LLC

InventorsGerald L. Brewer, Steven D. Olsen

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Abstract

A control system for the incineration of pollutants in waste gases which will conserve fuel consumption and which embodies feed back signals from temperature sensing means and/or gas analyzing means in connection with the combustion gases to detect an undesired temperature deviation from a control temperature or, alternatively, detect excessive unburned pollutants and utilize optimizing-controller means to receive the resulting output signals and, in turn, provide incremental control changes to effect a change in the temperature control level and the incremental stepping down or stepping up of a set point for the control of fuel flow to the heat supplying burner of the incineration zone.

Claims5

Dependent claims

In a process for effecting the incineration of undesired waste gaseous materials, the improved method for automatically adjusting and conserving fuel input to the burner for the incineration zone responsive to changes in the quantity of pollutants content of the waste gas stream being introduced to the incineration zone which comprises:

a. a fuel flow control means operating responsive to process feedback and set point signals,
b. measuring a change in the combustion zone stream leaving the incineration zone,
c. sending an output signal to a set point optimizing means indicative of a change in the combustion gas stream,
d. comparing a feed back signal with at least one predetermined set point level in said optimizing means and generating a signal for a set point change responsive to a differential from the predetermined set point level to make an incremental change in such level and regulate said fuel flow control means to change fuel flow to the burner, whereby fuel input can be decreased for an above normal temperature level and, conversely, increased for conditions of excessive pollutants in the waste gas stream and for a low temperature unstable reaction in the incineration zone, said feed back signal being indicative of a change in the temperature of the combustion gas stream and providing a change in a temperature set point level responsive to a temperature deviation.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/641,126Filed 15 Dec 1975
Granted: 26 Jul 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F23G 7/07
Of waste gases or noxious gases, e.g. exhaust gases: in which combustion takes place in the presence of catalytic material
F23G 5/50
Incineration of waste ; Incinerator constructions; Details, accessories or control therefor: control or safety arrangements
F23G 7/066
Using gaseous or liquid fuel: preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
F23N 5/003
Systems for controlling combustion: using detectors sensitive to combustion gas properties

Family

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