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A system for energy-saving environment friendly integrated flue gas treatment in a coking production process and a method thereof

An energy-saving, environmental-friendly, and production-process technology, applied in the field of flue gas treatment, can solve the problems of uneconomical and reliable application of catalytic denitrification process, low temperature, etc., and achieve the effects of reducing operating costs, increasing concentration, and good economy

Inactive Publication Date: 2017-04-05
JIANGXI YONGYUAN ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

Due to the low temperature of flue gas produced by coking, it is impossible to economically and reliably apply the catalytic denitrification process, and improvement is urgently needed

Method used

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  • A system for energy-saving environment friendly integrated flue gas treatment in a coking production process and a method thereof

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Embodiment 1

[0027] Embodiment 1: An integrated method for energy-saving and environmental protection treatment of flue gas in the coking production process, which includes the following implementation process: in the waste heat recovery process, the coking production flue gas from the coke oven flue is sent to the waste heat recovery boiler through the induced draft fan, and the The temperature of the flue gas is reduced from 300°C to about 160°C, and the waste heat of the flue gas is recovered to produce low-pressure steam, which enters the steam pipe network; the flue gas after waste heat recovery passes through the booster fan 3, passes through the flue gas input pipeline, and before entering the desulfurization tower 4 Confluence with the ozone input pipe, part of the flue gas Reacts quickly with ozone to generate , the flue gas is mixed with ozone and sent to the concentration section 42 of the desulfurization tower.

[0028] In the desulfurization process, in the concentration se...

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Abstract

A system for energy-saving environment friendly integrated flue gas treatment in a coking production process and a method thereof are disclosed. The rear end of a coking flue gas pipeline is connected to a waste heat boiler through an induced draught fan. A pipeline after the waste heat boiler is connected to a flue gas inlet at the concentration segment at the middle of a desulfurization tower through a booster fan. An ozone pipeline is separately connected to a desulfurized flue gas inlet and a denitration tower flue gas inlet pipeline. An ammonia water supplementing pipeline is connected to the bottom of a liquid storage tank. The liquid storage tank is connected to an ammonium sulfate circulating tank through a pipeline. One pipeline after the ammonium sulfate circulating tank is communicated with the top of the concentration segment, and the other pipeline is connected to a solid liquid separator. A mother liquor after separation by the solid liquid separator is connected to the liquid storage tank through a pipeline. Ammonia is produced in a coking production high-temperature carbonization process in a coking enterprise, ammonia water is newly increased in subsequent chemical product production processes, and the residual ammonia water of the coking enterprise is utilized in the method to achieve desulfurization, and therefore the running cost is reduced, ammonium sulfate is produced as a byproduct, and the economical efficiency is higher.

Description

technical field [0001] The invention relates to a flue gas treatment method in the coking production process, in particular to an integrated method for energy-saving and environmental-friendly treatment of flue gas in the coking production process, and belongs to the technical field of flue gas treatment methods in chemical energy-saving and environmental protection. Background technique [0002] Coking is one of the important industrial production processes. Coke and gas are produced by high-temperature dry distillation of coal in coke ovens. It is the basic industry of iron and steel, energy and chemical industry. Coking production involves a high-temperature combustion process above 1300°C, which will produce a large amount of nitrogen oxides, and due to coke oven leakage, high-sulfur raw coal gas enters the combustion chamber to participate in combustion, forming flue gas . Coking production has become one of the important sources of air pollutant emissions in China. ...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/78B01D53/76B01D53/60C01C1/24F27D17/00
CPCY02P10/25Y02P20/10Y02P20/129
Inventor 吴小平王学雷王连根刘松清
Owner JIANGXI YONGYUAN ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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