Hazardous waste incineration flue gas purification system and process

A technology for hazardous waste and flue gas incineration, applied in the direction of incinerators, combustion methods, combustion types, etc., can solve the problem of failure to meet standards and local requirements, single purification technology for hazardous waste incineration flue gas, and limited removal efficiency of nitrogen oxides and other problems, to achieve the effect of protecting the cloth bag, improving the absorption efficiency and reducing the pressure

Pending Publication Date: 2019-07-12
ZHEJIANG DOWAY ADVANCED TECH CO LTD
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Problems solved by technology

[0004] At present, the flue gas purification technology of hazardous waste incineration is single. Although it meets the emission limit requirements of pollutants in the "Pollution Control Standards for Hazardous Waste Incineration" (GB18484-2001), it cannot meet the increasingly stringent standards and local requir

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  • Hazardous waste incineration flue gas purification system and process
  • Hazardous waste incineration flue gas purification system and process

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Embodiment Construction

[0033] The above and other technical features and advantages of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0034] see figure 1 , the present invention provides a hazardous waste incineration flue gas purification system, including a rotary kiln 1, a waste heat boiler 2, a quench tower 3, a deacidification tower 4, a bag filter 5, a low-temperature plasma reaction device 7 and an absorption tower 8 connected in sequence; The rotary kiln 1 is used to incinerate hazardous waste; the inlet of the waste heat boiler 2 is equipped with an SNCR denitration agent atomization injection device 21, and the SNCR denitrification agent atomization injection device 21 is used to spray the denitrification agent to initially remove nitrogen oxides in the flue gas , the waste heat boiler 2 is used to recover t...

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Abstract

The invention discloses a hazardous waste incineration flue gas purification system and process. The hazardous waste incineration flue gas purification system comprises a rotary kiln, a waste heat boiler, a quench tower, a deacidifying tower, a bag-type dust remover, a low-temperature plasma reaction device and an absorption tower which are sequentially connected, the inlet of the waste heat boiler is provided with an SNCR denitration agent atomization jetting device, the quench tower is internally provided with an emergency cooling spraying device; an activated carbon jetting device and a drypowder jetting device are arranged on the upper part of the deacidification tower, a pre-cooling spraying device is arranged on the flue at the inlet of the absorption tower, a circulating spraying device and a demisting device are arranged in the absorbing tower. According to the method, the removal performance of SO2, NoX, smoke, HCl, HF and dioxin in the dangerous waste incineration flue gas are stable, particularly, the removal of the nitrogen oxides in the flue gas is high in efficiency, the concentration of the nitrogen oxides can be controlled to be 100 mg/Nm3, the operation stabilityis good; the system has the advantages of being simple in structure and low in investment operation cost.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a hazardous waste incineration flue gas purification system and process. Background technique [0002] Hazardous waste refers to waste that is included in the national hazardous waste list or determined to be hazardous according to the national hazardous waste identification standards. At present, incineration has become the main way of hazardous waste disposal. Due to the wide variety and complex nature of hazardous waste, the pollutant components in the flue gas of hazardous waste incineration are complex and fluctuate greatly. Although the "Pollution Control Standards for Hazardous Waste Incineration" (GB18484-2001) stipulates the emission limits of pollutants in the incineration flue gas, the limits for the indicators of smoke, sulfur dioxide, and nitrogen oxides are not high. [0003] With the continuous improvement of people's environmental requirements, the...

Claims

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Application Information

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IPC IPC(8): F23G5/20F23G5/16F23G5/44F23G5/46F23J15/00F23J15/02F23J15/06
CPCF23G5/165F23G5/20F23G5/44F23G5/46F23J15/003F23J15/006F23J15/02F23J15/06Y02E20/30
Inventor 汤宣林施小东翁林钢戚科技黄均聂菊桃
Owner ZHEJIANG DOWAY ADVANCED TECH CO LTD
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