Gas carbon dioxide liquefaction method

A technology of liquid carbon dioxide and carbon dioxide, which is applied in the field of gas processing, can solve problems such as complex process, poor safety, and large investment in equipment, and achieve the effects of facilitating liquefaction, improving safety, and realizing recycling

Active Publication Date: 2019-09-20
毛恒松 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The entire liquid ammonia refrigeration system leads to defects such as large equipment investment, complicated process and poor safety

Method used

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Embodiment Construction

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. In the figure, the single arrow indicates the direction of gaseous carbon dioxide or non-condensable gas, and the hollow arrow indicates the direction of liquid carbon dioxide.

[0027] Such as figure 1 with figure 2 Shown, a kind of gaseous carbon dioxide liquefaction method of the present invention comprises the following steps:

[0028] 1) Compression and cooling of carbon dioxide feed gas

[0029] After the gaseous carbon dioxide containing impurities is continuously compressed and cooled by the first stage compressor 11 and the second stage compressor 12 of the feed gas compressor 1, the pressure of the gaseous carbon dioxide is increased and the temperature of the gaseous carbon dioxide is lowered. Among them, the outlet pressure of the first stage compressor is controlled at 0.8~0.9MPa, and the temperature is controlled at 35°C; an inlet ch...

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Abstract

The invention discloses a gaseous carbon dioxide liquefaction method, comprising the following steps: 1) compression and cooling of carbon dioxide raw material gas, 2) purification of gaseous carbon dioxide after pressurization, 3) precooling of purified gaseous carbon dioxide and cooling of non-condensable gas 4) Part of the pre-cooled gas carbon dioxide is cooled into liquid carbon dioxide through a low-temperature liquefaction process, and 5) the liquid carbon dioxide is removed from the non-condensable gas in the liquid carbon dioxide through a low-temperature rectification process. The invention does not need to use liquefied ammonia as a refrigerant to cool down and liquefy gaseous carbon dioxide, which improves the safety of the system, and uses low-temperature rectification towers and low-temperature heat exchangers to replace expensive refrigeration equipment, which is more conducive to the liquefaction of gaseous carbon dioxide and greatly reduces gas The cost of carbon dioxide liquefaction realizes the recycling of carbon dioxide gas.

Description

technical field [0001] The invention relates to a compression and cooling liquefaction method of gaseous carbon dioxide, in particular to a method for purifying gaseous carbon dioxide first, and then performing precooling and low-temperature liquefaction, belonging to the technical field of gas processing. Background technique [0002] Carbon dioxide is a colorless, odorless gas widely present in the air and is the main source of greenhouse gases. Excessive emission of carbon dioxide has caused global warming. As an important resource, carbon dioxide has a wide range of uses, such as refrigerants, food additives, fire extinguishing agents, chemical raw materials, oil and gas exploration, agricultural production, etc. If carbon dioxide is recovered, stored and applied, it will not only improve the utilization of carbon resources, but also reduce the emission of greenhouse gases. [0003] The existing carbon dioxide recovery methods mainly include chemical absorption method,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J1/00
CPCF25J1/0027F25J3/0209F25J3/0257F25J3/08F25J2200/02F25J2200/74F25J2205/66F25J2210/04F25J2215/04F25J2215/80F25J2220/82F25J2230/30F25J2245/02F25J2270/02
Inventor 范庆虎毛恒松
Owner 毛恒松
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