Denitration method using single bin heating regeneration denitration system special for low-temperature flue gas

A heating regeneration, low temperature flue gas technology, applied in separation methods, chemical instruments and methods, gas treatment and other directions, can solve the problems of clogging catalysts, high operating costs, low temperature of coke oven flue exhaust gas, etc., and achieves a small footprint. , Simple operation and high efficiency

Active Publication Date: 2016-03-02
ANHUI TONGXING ENVIRONMENTAL PROTECTION ENG
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Problems solved by technology

[0004] The exhaust gas temperature of the existing coke oven flue is relatively low, generally around 160-320°C; the common denitrification catalysts currently on the market cannot meet the existing conditions, and the operating cost will be too high if the flue gas heating method is used, so this system uses a Low temperature denitrification catalyst
Because the catalyst will generate viscous substances such as ammonium bisulfate under the condition of low temperature and sulfur content to block the catalyst, the operating cost will be too high if the flue gas is heated

Method used

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  • Denitration method using single bin heating regeneration denitration system special for low-temperature flue gas

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Embodiment

[0024] Embodiment: The structure system of the single-chamber heating regeneration denitrification system dedicated to low-temperature flue gas in this embodiment is:

[0025] A plurality of denitration reactors 1 are arranged side by side, each reactor is provided with a soot blower 2 and a denitration catalyst 3, a first butterfly valve 5 is provided in the exhaust pipeline at the bottom of each reactor, and each reactor is provided with an inspection door 4; The inlet and outlet of each reactor are equipped with differential pressure transmitters, which are used to detect the pressure difference between the inlet and outlet of the reactor and transmit the signal to the control system. Among them, the denitrification catalyst is a low-temperature anti-sulfur catalyst, such as vanadium-titanium series (TiO 2 As the main carrier, V 2 o 5 as the main active ingredient, and contains a small amount of heavy metals).

[0026] The first main air intake pipeline 6 and the second ...

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Abstract

The invention discloses a denitration method using a single bin heating regeneration denitration system special for low-temperature flue gas. The system is mainly composed of a low-temperature denitration system, a reheating system, and an online ash cleaning system. The denitration catalyst has high low-temperature denitration ability; the reheating system separately heat each bin to recover catalyst activity; and the online ash cleaning system has the advantages of simple structure, less investment and easy operation. After passing through the system, the nitrogen oxide in the low temperature flue gas is reduced to nitrogen and water. The method provided by the invention has the advantages of simple operation, small land occupation, high efficiency and low cost.

Description

[0001] This application is a divisional application with application number 2014106418957 Technical field: [0002] The invention relates to a denitrification method using a special single chamber heating regeneration denitrification system for low-temperature flue gas, and belongs to the field of air pollution control of coking ovens. Background technique: [0003] Coke is formed by heating coal in the carbonization chamber of a coke oven under air-isolated conditions and undergoing a series of complex processes of physical changes and chemical reactions. The coke oven gas produced during coke carbonization contains pollutants such as sulfur dioxide and nitrogen oxides, which will generate new pollution in the subsequent use process. These sulfur dioxide and nitrogen oxides are important components of PM2.5 particulate matter, and are also the main cause of acid rain and smog. Its production mechanism is: the heat source of the carbonization chamber is provided by a certai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/96B01D53/56
CPCB01D53/8631B01D53/90B01D53/96B01D2251/2062B01D2258/02
Inventor 郑光明王充尹华冯引军苏龙龙
Owner ANHUI TONGXING ENVIRONMENTAL PROTECTION ENG
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