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Coke-oven gas quench-type methanation reaction device and reaction method thereof

A methanation reactor and reaction device technology, applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of longer process, increased pressure drop, increased number of reactors, etc., to achieve reduced circulation, short process and high efficiency high effect

Inactive Publication Date: 2015-05-06
大连瑞克科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage of this method is that the number of reactors will increase, the process will become longer, and the pressure drop will increase

Method used

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  • Coke-oven gas quench-type methanation reaction device and reaction method thereof
  • Coke-oven gas quench-type methanation reaction device and reaction method thereof
  • Coke-oven gas quench-type methanation reaction device and reaction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Purified coke oven gas, its composition (dry basis: %) is H 2 : 57.4; CH 4 : 25.8; CO: 8.2; CO 2 : 1.8; the remainder is an inert gas. Total flow 1000 Nm 3 / h, pressure 2.8 MPa, temperature 42°C. Workflow see figure 1 .

[0022] 1000 Nm 3 / h The coke oven gas is divided into two streams, the flow rate of the first stream is 400Nm 3 / h, heat exchange with the outlet gas of the secondary methanation reactor R-102, the temperature rises to 300°C, and the cycle gas from the cycler S-101 (flow rate is 160Nm 3 / h) mixing, the gas composition after mixing (dry basis: %) is H 2 : 51.8, CH 4 : 34.7, CO: 5.3, CO 2 : 2.1, temperature 280°C. The mixed gas enters the first cold-shock methanation reactor R-101, flows through the first-stage methanation catalyst bed R3, and the methanation reaction occurs, and the temperature of the gas exiting the first-stage bed is 585°C. Coke oven gas provided by a cold shock gas distributor R2 (flow rate 600Nm 3 / h) Mixing in the shock...

Embodiment 2

[0025] Purified coke oven gas, its composition (dry basis: %) is: H 2 : 57.4; CH 4 : 25.8; CO: 8.2; CO 2 : 1.8; the remainder is an inert gas. Total flow 1000 Nm 3 / h, pressure 2.8 MPa, temperature 42°C. Workflow see figure 2 .

[0026] 1000 N m 3 / h The coke oven gas is divided into three streams, the flow rate of the first stream is 300Nm 3 / h, heat exchange with the outlet gas of the secondary methanation reactor R-102, the temperature rises to 290 °C, and the cycle gas from the cycle machine S-101 (flow rate is 90Nm 3 / h) mixing, the temperature after mixing is 280°C. The mixed gas enters the second cold-shock methanation reactor R-101a, flows through the first-stage methanation catalyst bed R3, and the methanation reaction occurs, and the temperature of the gas exiting the first-stage methanation catalyst bed R3 is 578°C. This gas is combined with the second coke oven gas (flow rate 300Nm) provided by the first cold shock gas distributor R2 3 / h) Mixing in the ...

Embodiment 3

[0029] Purified coke oven gas, its composition (dry basis: %) is H 2 : 57.4; CH 4 : 25.8; CO: 8.2; CO 2 : 1.8; the remainder is an inert gas. Total flow 1000 Nm 3 / h, pressure 2.8 MPa, temperature 42°C. Workflow see figure 2 .

[0030] 1000 Nm 3 / h The coke oven gas is divided into three streams, the flow rate of the first stream is 200Nm 3 / h, heat exchange with the outlet gas of the secondary methanation reactor R-102, the temperature rises to 290°C, and the cycle gas from the cycler S-101 (flow rate is 200Nm 3 / h) mixing, the temperature after mixing is 280°C. The mixed gas enters the second cold-shock methanation reactor R-101a, flows through the first-stage methanation catalyst bed R3, and the methanation reaction occurs, and the temperature of the gas exiting the first-stage methanation catalyst bed R3 is 518°C. This gas is combined with the second coke oven gas (flow rate 400Nm) provided by the first cold shock gas distributor R2 3 / h) Mixing in the shock zon...

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Abstract

The invention discloses a coke-oven gas quench-type methanation reaction device and a reaction method thereof, and belongs to the field of coal chemical industry. A quench-type reactor is adopted by coke-oven gas methanation reaction. The coke-oven gas quench-type methanation reaction device is characterized in that a catalyst is filled in sections; a quench zone is formed between two sections of catalyst beds; at least one quench zone is contained in the reactor; a coke-oven gas containing a proper amount of recycle gas enters from the upper part of the reactor, enters the first section of catalyst bed and then is subjected to methanation reaction; the temperature rises; the gas flowing out from the first section of bed enters the quench zone, is mixed with a certain amount of low-temperature coke-oven gas, enters the second section of catalyst bed, and is subjected to methanation reaction; the temperature rises; the gas flowing out from the second section of bed enters the quench zone, is mixed with a certain amount of low-temperature coke-oven gas, enters a third section of catalyst bed, and is subjected to methanation reaction; and the temperature rises. According to the device and the method, only the coke-oven gas entering the first section of bed of the quench reactor needs to be diluted in cycle, so that the circulation quantity is correspondingly reduced; and the coke-oven gas quench-type methanation reaction device is short in flow and high in efficiency.

Description

technical field [0001] The invention relates to a coke oven gas-cooled shock type methanation reaction device and a reaction method thereof, that is, utilizing H in coke oven gas 2 , CO, CO 2 The generation of methane through methanation reaction belongs to the field of new coal chemical industry. Background technique [0002] Coke oven gas is a by-product produced during the production of coke, and is a combustible gas obtained during the coking process of coal. The main component of coke oven gas is H 2 、CH 4 , CO, CO 2 etc., using coke oven gas to produce methane (CNG or LNG) is a promising development direction, and the H 2 with CO, CO 2 Carrying out the methanation reaction can increase methane production by 30-40%. In recent years, a lot of research and development have been carried out on the methanation technology of coke oven gas at home and abroad, and a lot of experience has been accumulated, and many new problems have also arisen. [0003] At present, mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 周焕文唐恒然段恒斌
Owner 大连瑞克科技股份有限公司
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