Gas separation device and gas separation method for pyrolysis gas
A pyrolysis gas and gas separation technology, applied in the field of coal chemical industry, can solve the problems of insufficient utilization of value and poor economy
Active Publication Date: 2017-12-05
BEIJING ZHONGKE RUIAO ENERGY TECH CO LTD
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Problems solved by technology
[0004] If pyrolysis gas is directly used as fuel, its value cannot be fully utilized, and the economy is poor
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[0050]In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0051] see figure 1 , a gas separation device for pyrolysis gas in an embodiment, including a purification device (not shown in the figure) and a liquefaction separation device 100 .
[0052] The purification device is used to purify the pyrolysis gas. The volume content of effective components methane in pyrolysis gas is about 40%-45%, the volume content of hydrogen-rich gas is about 20%-25%, the volume content of C2-C5 is about 10%-14%, and it also contains a small amount of carbon monoxide and nitrogen. One or more impurities in inert gases such as carbon dioxide, trace organic sulfur, sulfur ...
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A gas separation device for pyrolysis gas, including a purification device and a liquefaction separation device, the purification device is used to purify the pyrolysis gas; the liquefaction separation device includes a first heat exchanger, a first gas-liquid separator, a mixed hydrocarbon rectification tower, The second heat exchanger, the dehydrogenation rectification tower and the methane rectification tower, the first gas-liquid separator outputs the first mixed hydrocarbon product, the mixed hydrocarbon rectification tower outputs the second mixed hydrocarbon product, and the first heat exchanger outputs hydrogen-rich gas , the methane rectification tower outputs LNG products; the liquefaction separation device also includes mixed refrigerant circulation refrigeration equipment and nitrogen circulation refrigeration equipment to provide cooling capacity. The above-mentioned gas separation device for pyrolysis gas, through the first gas-liquid separator for gas-liquid separation, and then through three rectification separations, can obtain mixed hydrocarbon products, hydrogen-rich gas and LNG products. The device equipment is not complicated, and the connection relationship is simple. The gas separation process is simple and easy to operate. In addition, a gas separation method of pyrolysis gas using the above-mentioned device is also provided.
Description
technical field [0001] The invention relates to the field of coal chemical industry, in particular to a gas separation device and a gas separation method for pyrolysis coal gas. Background technique [0002] The resource conditions of "rich coal, little gas, and lack of oil" determine that China's energy structure will be dominated by coal for a long time. Modern coal chemical industry is an important way to promote the clean and efficient transformation and utilization of coal. The scientific and technological innovation and technological development around coal chemical industry have very important social and economic significance. The quality-based utilization of coal led by pulverized coal pyrolysis technology is one of the important technical routes of the coal chemical industry. [0003] Coal separation and utilization refers to a process in which coal is pyrolyzed through medium and low temperature dry distillation, volatile components (coal tar, gas) are removed, an...
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IPC IPC(8): F25J3/02C10K1/00C10K1/32C10K1/10C10K1/14
Inventor 任小坤张武唐守胜高元景徐晓亮李腾
Owner BEIJING ZHONGKE RUIAO ENERGY TECH CO LTD