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Flue gas redistribution system and flue gas redistribution method of coke oven

A coke oven and flue gas technology, which is applied to the coke oven flue gas redistribution system and redistribution field, can solve the problems of high flue gas denitration cost and low denitration efficiency, and achieves simple loop structure, stable system operation and convenient operation. Effect

Pending Publication Date: 2020-06-16
NANJING LONGYUAN ENVIRONMENTAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application solves the problems of high flue gas denitrification cost and low denitrification efficiency in the prior art by providing a coke oven flue gas redistribution system

Method used

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  • Flue gas redistribution system and flue gas redistribution method of coke oven
  • Flue gas redistribution system and flue gas redistribution method of coke oven

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A flue gas re-distribution system for coke ovens includes a machine-side back-distribution air path for supplying exhaust gas with a set first temperature and first oxygen content to the combustion chamber of the coke oven; the coke-side back-distribution air path uses To provide exhaust gas with a second temperature and a second oxygen content to the combustion chamber of the coke oven; the machine-side back-distribution air path and the coke-side back-distribution air path are independent of each other.

[0044] The machine-side back-distribution air path includes a machine-side sub-flue in which exhaust gas with a first temperature and first oxygen content circulates; a machine-side back-distribution fan whose inlet is connected to the machine-side sub-flue and its outlet is connected to the coke The combustion chamber of the furnace is used to transport the exhaust gas with the first temperature and the first oxygen content to the combustion chamber of the coke oven.

[...

Embodiment 2

[0052] A coke oven flue gas back-allocation method includes the following steps:

[0053] When the coke oven is operating normally, the exhaust gas with the first temperature and the first oxygen content is flowing in the machine side sub-flue; the exhaust gas with the second temperature and the second oxygen content is flowing in the coke-side sub-flue;

[0054] When the flue gas re-distribution system is started, the coke-side re-distribution fan extracts the exhaust gas with the second temperature and the second oxygen content from the coke-side sub-flue, and sends it to the coke-side switch connected to the combustion chamber of the coke oven; The distribution fan extracts the exhaust gas with the first temperature and the first oxygen content from the machine-side sub-flue, and sends it to the machine-side switch connected to the combustion chamber of the coke oven;

[0055] The flowmeter on the outlet flue of the coke-side matching fan is used to measure the air extraction volu...

Embodiment 3

[0058] Such as figure 1 As shown, the main equipment of the flue gas back-distribution system for coke ovens of the present invention includes: coke-side back-distribution fan 2, coke-side back-distribution fan inlet flue 14, coke-side back-distribution fan outlet flue 3, machine-side return Equipped with fan 6, machine-side matched fan inlet flue 15 and machine-side matched fan outlet flue 7. The inlet flue 14 of the coke-side distribution fan connects the inlet of the coke-side distribution fan 2 to the coke-side sub-flue 1, and the outlet flue 3 of the coke-side distribution fan connects the outlet of the coke-side distribution fan 2 to the coke side. The switch 4 is connected, the compensator 13, the pressure gauge 10, the flow meter 11 and the thermometer 12 are arranged on the outlet flue 3 of the coke-side matching fan, and the outlet flue 3 of the coke-side matching fan is opened and closed on the coke side. A regulating valve 9, a pressure gauge 10 and a flow meter 11 ...

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Abstract

The invention relates to the technical field of flue gas denitrification, in particular to a flue gas redistribution system and method for a coke oven. The flue gas redistribution system comprises a machine-side redistribution air path used for providing waste gas with a set first temperature and a set first oxygen content for a combustion chamber of the coke oven; a coke-side return air distribution path used for providing waste gas with a set second temperature and a second oxygen content for a combustion chamber of the coke oven; and the machine-side air return and distribution path and thecoke-side air return and distribution path are independent of each other. The problems that in the prior art, the flue gas denitration cost is high, and the denitration efficiency is low are effectively solved.

Description

Technical field [0001] The invention relates to the technical field of flue gas denitration, and relates to a flue gas back-allocation system and a back-allocation method of a coke oven. Background technique [0002] With the increasingly stringent environmental regulations, there is an urgent need for the denitration of coke oven exhaust gas. The NOx content in the exhaust gas discharged from the coke oven is about 1000mg / Nm3. The reason for the higher NOx in coke oven exhaust gas is: the high temperature in the combustion chamber, about 1300°C, oxygen and nitrogen generate thermal NOx at this high temperature. [0003] The coking plant currently mainly uses selective catalytic reduction (SCR) technology for denitrification. SCR technology introduces flue gas into the SCR reactor where the catalyst is placed. In the SCR reactor, the reducing agent NH 3 Under the influence of temperature and catalyst, NOx in flue gas can be selectively reduced to N 2 . Due to the construction of ...

Claims

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Application Information

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IPC IPC(8): C10B49/02C10B57/00C10B45/00F23L5/02B01F3/02B01F23/10
CPCC10B49/02C10B57/00C10B45/00F23L5/02B01D2257/00B01D2257/80B01D2258/0283B01F23/19
Inventor 雷达刘轶肖遥
Owner NANJING LONGYUAN ENVIRONMENTAL CO LTD
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