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A method for utilizing waste heat of coke oven flue gas

A coke oven flue gas and waste heat technology, which is applied in coke ovens, separation methods, combustion methods, etc., can solve problems such as ineffective utilization and heat loss, so as to improve the utilization rate of heat energy, reduce external emissions, and improve dryness. The Effect of Steam Production per Ton of Coke Quenching

Active Publication Date: 2019-07-26
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The temperature of the coke oven flue gas during the coking production of Panzhihua Iron and Steel Co., Ltd. is 180 ℃ ~ 300 ℃, which has not been effectively utilized, resulting in heat loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The coke oven flue gas of the present embodiment comprises the composition of following mass content: N 2 66.8%, O 2 10%, CO 2 9.8%, H 2 O is 9.3%, and others are 4.1%.

[0027] When online monitoring shows O 2 、H 2 , CO or CO 2 When the content of the gas is high, specifically when it is higher than the required value in Table 2, it is necessary to reduce the content of the above-mentioned gas in the circulating gas in order to ensure the safe operation of the CDQ furnace. At this time, when the circulating gas in the CDQ flows through the annular flue, a blower is used to introduce the coke oven flue gas, and the oxygen in the coke oven flue gas is used to burn off part of the combustible gas such as O 2 、H 2 , CO, reduce O 2 、H 2 , CO and CO 2 content to ensure the safe operation of CDQ system.

[0028] After the coke oven flue gas is introduced into the CDQ furnace, it circulates in the CDQ furnace with the circulating gas, and the coke is quenched. The h...

Embodiment 2

[0030] The coke oven flue gas of the present embodiment comprises the composition of following mass content: N 2 67.8%, O 2 9.9%, CO 2 10.5%, H 2 O is 9.4%, and others are 2.4%.

[0031] When online monitoring shows O 2 、H 2 , CO or CO 2 When the content of the gas is high, specifically when it is higher than the required value in Table 2, it is necessary to reduce the content of the above-mentioned gas in the circulating gas in order to ensure the safe operation of the CDQ furnace. At this time, when the circulating gas in the CDQ flows through the annular flue, a blower is used to introduce the coke oven flue gas, and the oxygen in the coke oven flue gas is used to burn off part of the combustible gas such as O 2 、H 2 , CO, reduce O 2 、H 2 , CO and CO 2 content to ensure the safe operation of CDQ system.

[0032] After the coke oven flue gas is introduced into the CDQ furnace, it circulates in the CDQ furnace with the circulating gas, and the coke is quenched. The...

Embodiment 3

[0034] The coke oven flue gas of the present embodiment comprises the composition of following mass content: N 2 69%, O 2 9.5%, CO 2 9.8%, H 2 O is 9.1%, and others are 2.6%.

[0035] When online monitoring shows O 2 、H 2 , CO or CO 2 When the content of the gas is high, specifically when it is higher than the required value in Table 2, it is necessary to reduce the content of the above-mentioned gas in the circulating gas in order to ensure the safe operation of the CDQ furnace. At this time, when the circulating gas in the CDQ flows through the annular flue, a blower is used to introduce the coke oven flue gas, and the oxygen in the coke oven flue gas is used to burn off part of the combustible gas such as O 2 、H 2 , CO, reduce O 2 、H 2 , CO and CO 2 content to ensure the safe operation of CDQ system.

[0036] After the coke oven flue gas is introduced into the CDQ furnace, it circulates in the CDQ furnace with the circulating gas, and the coke is quenched. The hi...

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PUM

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Abstract

The invention discloses a method for utilizing residual heat of flue gas of a coke stove. The method is characterized in that when the content of O2 (oxygen) in circulating gas of a coke dry quenching furnace is more than 1%, the content of H2 (hydrogen) is more than 3%, the content of CO (carbon monoxide) is more than 6%, or the content of CO2 (carbon dioxide) is more than 18%, the flue gas of the coke stove is guided into the coke dry quenching furnace, so that the content of O2 in circulating gas is less than or equal to 1%, the content of H2 is less than or equal to 3%, the content of CO is less than or equal to 6%, and the content of CO2 is less than or equal to 18%. The method has the advantages that the utilization rate of heat energy is effectively improved, the economic benefit is good, the emission amount of high-temperature gas is reduced, and the environment-friendly benefit is better.

Description

technical field [0001] The invention relates to the technical field of industrial energy saving, in particular to a method for utilizing waste heat of coke oven flue gas. Background technique [0002] In coking production, a large amount of waste heat from combustion waste gas is wasted with the discharge of flue gas, and it also causes thermal pollution to the environment. The temperature of the coke oven flue gas is between 180°C and 300°C. When it is shot into the atmosphere through the smoke, the heat taken away by it accounts for about 25%, which wastes energy and puts pressure on the environment. [0003] The temperature of coke oven flue gas during coking production in Panzhihua Iron and Steel is 180°C to 300°C, which has not been effectively utilized, resulting in heat loss. In the background of the iron and steel industry as a whole being in a meager profit or loss, energy conservation, emission reduction, consumption reduction and efficiency enhancement are effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/00C10B39/02F23G7/06
CPCY02P20/129
Inventor 黄先佑王建明祝永强舒文东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP