Combustion treatment device and process for nitrogen-containing raw material

A processing device and raw material technology, applied in the direction of combustion method, combustion type, incinerator, etc., can solve the problems of high operating cost, large consumption of chemicals, heat loss of slurry mixing water, etc., to reduce equipment and operating costs, and adaptability of raw materials Strong, NOx concentration reduction effect

Pending Publication Date: 2020-11-13
SHANGHAI LANKE PETROCHEM ENG & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Combustion treatment device and process for nitrogen-containing raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1 Comprehensive disposal project of gas, liquid and solid waste in a chemical plant

[0071] Raw material: Combustion raw material contains 2 kinds of solid waste, 3 kinds of waste liquid, 1 kind of waste gas, the total nitrogen content of raw material is 2.67%wt (calculated as N, excluding N 2 content).

[0072] Solid waste 1: solid tar

[0073] Solid waste 2: waste activated carbon

[0074] Waste liquid 1: acrylonitrile waste liquid (containing 5.4%wt C 3 h 5 N, the remainder is water)

[0075] Waste liquid 2: crude acrylonitrile liquid (containing 49.13%wt C 2 h 3 N, 0.59% wt C 3 h 3 N, 2.28%wt HCN, the rest is water)

[0076] Waste liquid 3: hydrocyanic acid (containing 99.6%wt HCN, the remainder is water)

[0077] Exhaust gas 1: Absorption tower exhaust air (including 58mg / Nm 3 C 3 h 3 N, 926mg / Nm 3 NO 2 , 88.34% wt N 2 , 1.03%wt CO, the rest is inert gas, oxygen, water)

[0078] Combustion treatment device: adopt the device of the presen...

Embodiment 2

[0082] Example 2: Comprehensive disposal project of gas, liquid and solid waste in a chemical plant

[0083] Raw materials: same as Example 1.

[0084] Combustion treatment device: same as embodiment 1.

[0085] Feed: same as Example 1.

[0086] Combustion treatment process: the pyrolysis temperature is controlled at 1200-1250°C, the air-fuel ratio of the pyrolysis section is 0.85, the temperature of the primary combustion chamber is controlled at 1050-1100°C, and the temperature of the secondary combustion chamber is controlled at 900-950°C.

[0087] Treatment effect: NOx concentration of flue gas at the outlet of the incinerator: 185mg / Nm 3 , the outlet oxygen concentration is about 3.2%, VOCs cannot be detected, and the NOx conversion rate of the whole raw material nitrogen is about 0.70%.

Embodiment 3

[0088] Example 3: Comprehensive disposal project of gas, liquid and solid waste in a chemical plant

[0089] Raw materials: same as Example 1.

[0090] Combustion treatment device: same as embodiment 1.

[0091] Feed: solid waste 1 and solid waste 2 are sent to the rotary pyrolysis furnace through the solid waste inlet 12 through the feeder, and the high-nitrogen waste liquid 1, 2, 3 is sent to the thermal pyrolysis furnace through the waste liquid spray gun through the nitrogen-containing waste liquid inlet 14 The pyrolysis section and the pyrolysis section are also equipped with afterburning burners. The primary combustion chamber of the combustion section is provided with the primary air inlet 21 of the combustion section and the exhaust gas 1 interface (the high-nitrogen exhaust gas 1 is sent into the primary combustion chamber through the exhaust gas 1 interface), and the shrinking mixing structure 27 at the entrance of the secondary combustion chamber 29 is provided wit...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/00F23G5/027F23G5/16F23G5/44
CPCF23G5/008F23G5/027F23G5/165F23G5/44F23G2201/30F23G2202/103F23G2209/10F23G2209/14
Inventor 熊绍武马洪玺杜先孙国辉
Owner SHANGHAI LANKE PETROCHEM ENG & TECH
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