Combustion treatment device and process for nitrogen-containing raw material

Abstract

The invention discloses a multi-phase combustion treatment device for nitrogen-containing raw material. The multi-phase combustion treatment device comprises a pyrolysis section and a combustion section which are connected into a whole, wherein a multi-medium combustor and a plurality of nitrogen-containing raw material inlets are arranged at one end of the pyrolysis section; the multi-medium combustor is provided with a plurality of inlets used for introducing high-calorific-value waste gas and liquid and air for combustion of the high-calorific-value waste gas and liquid; the combustion section comprises a plurality of communicated combustion chambers and is used for completely combusting pyrolysis products step by step; and the other end of the pyrolysis section is connected to one of the combustion chambers. The invention further provides a multi-phase combustion treatment process of the nitrogen-containing raw material. According to the combustion treatment device and process, integrated multi-phase combustion can be carried out especially for high-nitrogen three wastes, the NOx conversion rate of raw material nitrogen is reduced to 5% or below, the oxygen content of flue gasis controlled within 1%-5%, the flue gas amount and the flue gas purification cost are reduced, and better social and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical treatment, and relates to a multi-phase combustion treatment device and process for nitrogen-containing raw materials. Background technique [0002] Some chemical companies or chemical parks need to treat solid waste, organic waste liquid and organic waste gas at the same time, and their solid waste, organic waste liquid and organic waste gas have complex components, some with high calorific value and some with low calorific value. At present, the usual treatment method is to treat solid waste, waste liquid and waste gas with high calorific value and low calorific value separately. For example, waste liquid and gas with high calorific value are directly incinerated, and VOC waste gas with low calorific value is treated by catalytic oxidation. This leads to a park or a chemical plant needing to build several sets of incineration disposal devices for different three wastes, resulting in increased i...

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Problems solved by technology

This leads to a park or a chemical plant needing to build several sets of incineration disposal devices for different three wastes, resulting in increased investment, increased land occupation, and waste of resources

[0003] Chinese patent document CN201920201760.7 discloses a comprehensive gas-liquid-solid waste treatment system, which uses a coal-water slurry process, but its solid waste application scope is limited to coal, biomass, petroleum coke, blue carbon, sludge, oil sands For solid waste with high calorific value such as waste activated carbon, a lot of additives need to be added during the preparation of coal slurry, which increases the incineration amount of the incinerator, and there are problems of limited scope of application and serious heat loss of slurry mixing water.

[0004] In the solid waste, waste liquid, and waste gas of chemical enterprises, there is often a high content of ammonia nitrogen. The traditional incineration process combines a variety of low-nitrogen combustion technologies to control the conversion of ammonia nitrogen into NOx in the fuel. The ratio can be controlled below 50%. , for many organic wastes with high ammonia nitrogen content, the conversion rate of 50% is still very high, the follow-up flue gas denitrification investment is large, the consumption of chemicals is large, and the operating cost is high

[0005] Chinese patent document CN202010124361.2 discloses a low-nitrogen incineration technology for waste liquid and waste gas, the NO of fuel nitrogen X The conversion rate can be controlled at about 10%, but for many high-nitrogen raw materials, the conversion rate of 10% is still very high, and this method cannot handle solid waste, so it cannot solve the solid waste, waste liquid, and waste gas of high raw material nitrogen Comprehensive integration of ultra-low nitrogen disposal problems

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