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Waste incineration flue gas purification method and system

A flue gas purification system and waste incineration technology, applied in the field of flue gas purification, can solve problems such as difficult to meet the requirements, achieve the effects of reducing power consumption, reducing system pressure drop, and high denitrification efficiency

Inactive Publication Date: 2020-03-13
CHINA URBAN CONSTR DESIGN & RES INST CO LTD
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  • Description
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Problems solved by technology

With the improvement of national environmental protection requirements and the different environments in different regions, the requirements for flue gas emission indicators are becoming more and more stringent, and it is difficult to meet the requirements simply by using the above-mentioned processes

Method used

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  • Waste incineration flue gas purification method and system
  • Waste incineration flue gas purification method and system
  • Waste incineration flue gas purification method and system

Examples

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Embodiment 1

[0058] Such as figure 1 Shown is a schematic diagram of the garbage incineration flue gas purification system of the present invention, and the structure and treatment method of the system are described in conjunction with the accompanying drawing.

[0059] Such as figure 1 As shown, the ammonia water nozzle of the SNCR system is installed on the first flue of the boiler at the outlet of the waste incinerator, and the high temperature environment in the flue is used to inject ammonia water for denitrification reaction, and the NO in the flue gas x Reduce the concentration and ensure that the concentration at the outlet of the waste heat boiler is controlled at 200mg / Nm 3 the following.

[0060] The flue gas (about 195°C) at the outlet of the waste heat boiler enters the semi-dry reaction tower for the first step of deacidification treatment. Slaked lime is made into lime slurry through a pulping system, and sprayed into the reaction tower through a rotary atomizer. The flu...

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Abstract

The invention discloses a waste incineration flue gas purification method and a system. The waste incineration flue gas purification method comprises the following steps: (1) enabling waste incineration flue gas to flow through an SNCR treatment system to be subjected to denitration treatment; (2) enabling outlet flue gas of the SNCR treatment system to enter a semi-dry reaction tower for deacidification treatment; (3) introducing outlet gas of the semi-dry reaction tower into a bag type dust collector for dust removal treatment; (4) heating outlet gas of the bag type dust collector, and enabling the heated outlet gas of the bag type dust collector to enter into an SCR reaction tower for further denitration treatment; and (5) cooling outlet gas of the SCR reaction tower, and feeding the cooled outlet gas into a wet-process washing tower for further deacidification treatment, thereby realizing purification of the waste incineration flue gas. The treatment process of SNCR-semi-dry method-activated carbon adsorption-bag type dust removal-SCR-wet method is adopted, and efficient purification treatment of the household garbage incineration flue gas can be achieved.

Description

technical field [0001] The invention relates to a method and system for purifying waste incineration flue gas, belonging to the technical field of flue gas purification. Background technique [0002] The acceleration of the urbanization process has made the disposal of municipal solid waste a very difficult problem. At present, in the process of domestic waste disposal, incineration is recommended. The flue gas generated after waste incineration contains a large amount of harmful substances. If the treatment is not up to standard, it will affect the health of surrounding residents and bring serious pollution to the environment. At present, the common domestic waste incineration flue gas treatment technology is the "SNCR-semi-dry method-dry method-activated carbon adsorption-bag dust removal" process, which can control the flue gas emission indicators to meet the requirements of the national standard. With the improvement of national environmental protection requirements and...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/56B01D53/50
CPCB01D53/504B01D53/56B01D53/75B01D2258/0291
Inventor 龚燊翟力新吴剑赵联淼张召陈希张颖梅洪光季辉张蒙雨闫晓强张迪白永凤熊岩刘英全樊宝绅邓丽红翟红霞
Owner CHINA URBAN CONSTR DESIGN & RES INST CO LTD
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