Heat decomposition gas processing method and apparatus of carbonization processing system containing water

Abstract

The invention provides a thermal decomposing gas treating device for a high water cut organism carbonizing treatment system. The invention ensures that the thermal decomposing gas burns in a combustion furnace after carbonizing treatment in decomposing gas combustion furnace; the use of auxiliary fuel reaches the lowest limit and a low fuel consumption rate is kept; and besides, the complete combustion can be realized with the reduction of NOx quantity. The thermal decomposing gas treating device is characterized in that the device comprises the following processing steps: introducing the thermal decomposing gas from high water cut organism in carbonizing furnace to the decomposing gas combustion furnace to burn; putting in part of drying waste gas after drying treatment for the first time; providing primary burning gas at the same time to carry on burning treatment under reducing gas environment; providing secondary oxidizing gas to burning gas under reducing gas environment to carry out burning treatment under reducing gas environment; and providing drying waste gas to the burning gas under oxidizing gas environment the second time to carry on final burning treatment.

Description

technical field [0001] The invention relates to a thermal decomposition gas treatment method and a device thereof in a carbonization treatment system for treating high-water organic matter such as sludge, food processing residues, animal manure and urine produced in sewage treatment plants and the like. Background technique [0002] In order to carbonize high-moisture organic matter represented by sewage sludge, generally, the raw material, that is, the water-containing organic matter is dried and then carbonized in a carbonization furnace. [0003] Here, as the heat source of the carbonization treatment, combustion exhaust gas obtained by burning the pyrolysis gas generated by the carbonization treatment in the decomposition gas combustion furnace is used. [0004] The invention of Patent Document 1 (Japanese Unexamined Patent Publication No. 2005-199157) related to the applicant's application in this case provides a pyrolysis gas of a carbonization treatment system for hig...

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Problems solved by technology

[0021] as inhibition from containing the NH 3 The combustion method for converting gas to NOx is effective for low-NOx combustion based on high-temperature reduction combustion using an auxiliary fuel composed of fossil fuels. However, in this case, a large amount of auxiliary fuel is required, and the fuel consumption rate of the auxiliary fuel tends to increase. , there is room for improvement in this

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