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Resourceful utilization method and system for combining waste gas containing hydrogen and fuel cell clean power generation

A fuel cell and fuel cell stack technology, applied in the direction of fuel cells, chemical instruments and methods, separation methods, etc., can solve the problems of low comprehensive utilization, low resource utilization, secondary pollution, etc., and achieve comprehensive economic and environmental protection Significant benefits, high resource utilization, no secondary pollution

Active Publication Date: 2018-05-08
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to address the above problems and propose a method to overcome the problems of high energy consumption, easy to cause secondary pollution, low resource utilization rate, poor economic efficiency, and low degree of comprehensive utilization in the traditional chemical hydrogen-containing waste gas treatment method, especially in incineration treatment. , to provide a clean, safe and efficient energy production with excellent industrial application economy, low cost of separation and purification, resource utilization of low-value chemical hydrogen-containing waste gas and coupled power generation, and sustainable economic development

Method used

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  • Resourceful utilization method and system for combining waste gas containing hydrogen and fuel cell clean power generation
  • Resourceful utilization method and system for combining waste gas containing hydrogen and fuel cell clean power generation
  • Resourceful utilization method and system for combining waste gas containing hydrogen and fuel cell clean power generation

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Embodiment 1

[0032] Taking methanol synthesis exhaust gas from a coal-to-methanol plant in northern Shaanxi as an example, the composition and conditions of the original raw material gas are shown in Table 1:

[0033] Table 1 Composition of purge gas from methanol synthesis

[0034]

[0035] The specific processing method is as follows:

[0036] The above-mentioned hydrogen-containing methanol synthesis gas does not need to be depressurized after being drawn out from the device. The raw gas first passes through the buffer tank and dust removal device to remove suspended solid-liquid particles and liquid oil droplets in the gas to ensure that the residual oil content is <0.01ppm, and then heated Vessel 8 is heated to about 45-55°C. The purpose of pretreatment is to ensure the cleanness of the gas entering the membrane, so as to ensure the long-term stable operation of the membrane separation device. After the raw material gas is pretreated, it meets the requirements of entering the mem...

Embodiment 2

[0042] Taking hydrogenation and purge gas from a refinery in northern Shaanxi as an example, the composition and conditions of the raw raw gas are shown in Table 3:

[0043] Table 3 Composition of purge gas from methanol synthesis

[0044]

[0045] The specific processing method is as follows:

[0046] The above-mentioned hydrogen-containing synthetic purge gas does not need to be depressurized after being drawn out from the device. The raw material gas first passes through the buffer tank and the dust removal device. The dust removal device adopts a ceramic sintered tube system to remove suspended solid-liquid particles and liquid oil droplets in the gas to ensure residual The oil content is less than 0.01ppm, and then heated to about 45-55°C by heater 8. The purpose of pretreatment is to ensure the cleanness of the gas entering the membrane, so as to ensure the long-term stable operation of the membrane separation device. After pretreatment, the feed gas meets the requi...

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Abstract

The invention belongs to the technical field of chemical exhaust gas resource utilization, and particularly relates to a resourceful utilization method and system for combining waste gas containing hydrogen and fuel cell clean power generation. The method comprises the following steps that 1, preliminary separation is conducted, wherein the concentration of CO in virgin gas is 7-50%, and is then lowered within 5%; 2, the virgin gas enters a PSA pressure swing adsorption device to be subjected to pressure swing adsorption after being subjected to buffering and liquid separation through a gas and liquid separation unit; 3, after the concentration of CO in the virgin gas is lowered to 10 ppm or below from 5% after treatment, hydrogen is obtained at the tower top; then the virgin gas of whichthe concentration of CO is smaller than or equal to 10 ppm is regarded as fuel cell virgin gas, and fuel cell power generation is conducted through a proton membrane hydrogen cell stack system. The output electric energy is in parallel use, and the generated water enters an origin water pipe network for use. The resourceful utilization method and system have high industrial economic value.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of chemical waste gas, and in particular relates to a method and system for resource utilization of hydrogen-containing waste gas coupled with fuel cells for clean power generation. Background technique [0002] Hydrogen-containing chemical waste gas is a precious resource that has not been effectively utilized. It exists widely in major process systems in the petrochemical and coal chemical industries. It has the characteristics of high hydrogen content, high outlet pressure, low dust content, and a huge amount. features. With the rapid development of modern coal chemical industry, especially the large-scale popularization of coal-to-methanol and MTO processes, the high-hydrogen-containing waste gas represented by methanol synthesis off-gas has shown a blowout growth. According to incomplete statistics, the methanol synthesis hydrogen-containing off-gas in Shaanxi Province alone is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0662H01M8/0668B01D53/22B01D53/047
CPCB01D53/047B01D53/228B01D53/229B01D2256/16B01D2257/502H01M8/0662H01M8/0668Y02E60/50
Inventor 齐永红杨东元黄建良许磊李霁阳屈文婷
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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