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Ultra-clean emission system and method for hazardous waste incineration flue gas

A technology for incinerating flue gas and hazardous waste, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as excessive acid pollutants, achieve stable emission indicators, improve stability, reduce and remove toxic gases and The effect of impurities

Pending Publication Date: 2019-12-10
北京精刻环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] For the flue gas treatment of hazardous waste incineration that has been built in China, the mainstream deacidification process is dry method + wet method single-tower deacidification, which is prone to short-term acid pollutants exceeding the standard under the condition of material fluctuations

Method used

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  • Ultra-clean emission system and method for hazardous waste incineration flue gas

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Embodiment 1

[0032]In order to prolong the service life of each equipment in the process and meet the emission standards of flue gas, it is necessary to control the content of the following elements in the hazardous waste entering the rotary kiln: Clx A reduction reaction occurs with urea, and the removal rate is about 50%.

[0033] After passing through the waste heat boiler, the temperature of the flue gas is reduced to 500-600°C. In order to avoid the synthesis of dioxins during the cooling process, the flue gas enters the quench tower 6 from above through the flue. The quench tower 6 is made of 10mm steel plate + 100mm aluminum silicate fiber felt + 80mm wear-resistant castable, and the top is equipped with a dual-fluid spray system 7, which generates atomized water droplets and rapidly cools the flue gas to below 200°C within 0.8s.

[0034] The cooled flue gas enters the dry deacidification system, and the deacidification tower is made of carbon steel and lined with KPI acid-resistant ...

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Abstract

The invention discloses an ultra-clean emission system and method for hazardous waste incineration flue gas, and belongs to the technical field of waste gas treatment. The system and method comprise the following devices and flow successively, and the device sequentially comprises an SNCR high-temperature denitration system, a quench tower, a dry deacidification system, a low-filtering-speed bag type dust collector, a double-tower double-circulation wet deacidification system, a honeycomb tube type wet electric demister, a flue gas reheater, an induced air exhaust system and the like. By the adoption of the system and method, toxic gas and impurities in incineration flue gas can be effectively reduced and removed, and the clean emission degree is achieved.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a system and method for ultra-clean discharge of flue gas from hazardous waste incineration. Background technique [0002] The use of incineration to treat hazardous waste has the advantages of high degree of harmlessness, good volume reduction effect, and small footprint. It can harmlessly and reduce the toxic and harmful substances in hazardous waste. decomposed into simple harmless substances (mainly CO 2 and H 2 O), so that the flammable substances are completely oxidized and reach a stable state. [0003] Incineration flue gas contains a certain amount of dust, toxic gases (carbon monoxide, nitrogen oxides, sulfur dioxide, hydrogen chloride and hydrogen fluoride, etc.), dioxins and heavy metals such as mercury, cadmium, and lead. In order to prevent the flue gas produced by incineration from causing secondary pollution to the atmospheric environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/54B01D53/83B01D53/40B01D50/00B01D53/04
CPCB01D53/78B01D53/54B01D53/83B01D53/40B01D50/00B01D53/04B01D2258/0283B01D2253/102
Inventor 陈震刘春慧王风臣李渊李墨青
Owner 北京精刻环保科技有限公司
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