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Integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery

A technology for flue gas desulfurization and coke oven flue, which is applied in steam generation method using heat carrier, chemical instrument and method, dispersed particle filtration, etc. The effect of large evaporation, more waste heat recovery and low exhaust temperature

Inactive Publication Date: 2015-12-23
CHENGDU HUAXITANG INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] The present invention solves the secondary pollution, high operating cost, high energy consumption, coke oven leakage of SO 2 To solve the problem of excessive emissions, an integrated system for desulfurization, denitrification and waste heat recovery of coke oven flue gas is provided

Method used

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  • Integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery
  • Integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery
  • Integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery

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Embodiment 1

[0058] The present invention adopts coke oven flue gas low-temperature SCR denitrification + dry desulfurization system. The prior art generally adopts coke oven flue gas semi-dry desulfurization + low-temperature SCR denitrification system. See Table 1 for specific comparison:

[0059] Table 1. Comparison between the integrated system of desulfurization, denitrification and waste heat recovery of the present invention and the prior art

[0060]

Embodiment 2

[0062] An integrated system for coke oven flue exhaust gas desulfurization and denitrification and waste heat recovery, including a coke oven 1, a low-temperature SCR denitrification system 2, a waste heat boiler 3, a flue 10, a pulverizer 7, a filter system 4, and a chimney 6; The coke oven 1, the low-temperature SCR denitrification system 2, the waste heat boiler 3, the filter system 4 and the chimney 6 are sequentially connected through a flue 10, and a dry powder absorbent is arranged on the flue 10 between the waste heat boiler 3 and the filter system 4 Inlet, the dry powder absorbent inlet is connected to the outlet of the pulverizer 7 through a pipeline, and the pulverizer 7 is provided with an absorbent inlet.

[0063] The waste heat boiler 3 is a heat pipe natural circulation waste heat boiler, and the existing technology generally adopts a flue-type water pipe natural circulation waste heat boiler, and the specific comparison is shown in Table 2:

[0064] Table 2. Co...

Embodiment 3

[0067] An integrated system for coke oven flue exhaust gas desulfurization and denitrification and waste heat recovery, including a coke oven 1, a low-temperature SCR denitrification system 2, a waste heat boiler 3, a flue 10, a pulverizer 7, a filter system 4, and a chimney 6; The coke oven 1, the low-temperature SCR denitrification system 2, the waste heat boiler 3, the filter system 4 and the chimney 6 are sequentially connected through a flue 10, and a dry powder absorbent is arranged on the flue 10 between the waste heat boiler 3 and the filter system 4 Inlet, the dry powder absorbent inlet is connected to the outlet of the pulverizer 7 through a pipeline, and the pulverizer 7 is provided with an absorbent inlet.

[0068] The low-temperature SCR denitration system 2 is an SCR denitration system with a temperature range of 160°C to 290°C.

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Abstract

The invention provides an integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery. The integrated system comprises a coke oven, a low-temperature SCR denitrification system, a waste heat boiler, a flue, a pulverizer, a filtering system and a chimney. The coke oven, the low-temperature SCR denitrification system, the waste heat boiler, the filtering system and the chimney are sequentially connected through the flue, a dry powder absorbent inlet is formed in the portion, between the waste heat boiler and the filtering system, of the flue and is connected with an outlet of the pulverizer through a pipeline, and an absorbent inlet is formed in the pulverizer. The system is free from waste water and gas emission and capable of directly carrying out denitrification without heating, absorbent can be used circularly, investment can be reduced, and energy can be saved.

Description

technical field [0001] The invention relates to the technical field of coke oven flue gas pollutant control and heat recovery, in particular to an integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery. Background technique [0002] Pollutants emitted from coke oven chimneys, mainly containing SO 2 , NO X and dust particles. Studies have shown that gaseous SO 2 , NO X It is the precursor of PM2.5, dust particles are the main component of PM10, composed of SO 2 , NO X The amount of PM2.5 transformed by precursors such as VOCs and VOCs is more than that emitted directly. SO 2 , NO X Dust particles are the main substances that form smog and acid rain. In recent years, my country's SO 2 , NO X Air pollution and acid rain have caused serious harm to human health and ecosystems, and have become important factors restricting the sustainable development of my country's economy and society. The government and society have also p...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56B01D53/83B01D53/50B01D46/02F22B1/18
Inventor 任毅李东林周礼唐茂辉陈洪会
Owner CHENGDU HUAXITANG INVESTMENT
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