Low-temperature rectisol process and device

A low-temperature methanol washing and process technology, which is applied in the petroleum industry, combustible gas purification, and separation of dispersed particles, to achieve the effect that the output will not decrease

Inactive Publication Date: 2010-07-14
CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The problem solved by the present invention is to provide a low-temperature methanol washing process, the heat exchan

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  • Low-temperature rectisol process and device

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Embodiment Construction

[0024] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with the examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0025] The low-temperature methanol washing process provided by the invention comprises the following steps:

[0026] Step a) spray methanol solution into the crude gas to be treated, so that the methanol atomizes and dissolves into the crude gas to lower the freezing point of the gas. The volume concentration of the injected methanol solution is preferably 98%-99.8%, and the amount of the methanol solution is preferably 180kg / h-190kg / h.

[0027] Step b) performing primary cooling on the crude gas sprayed into the methanol solution. Since methanol is dissolved in the crude gas, the freezing point of methanol is as low as...

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Abstract

The invention provides a low-temperature rectisol process, comprising the following steps: a) injecting methyl alcohol solution into untreated gases; b) cooling the untreated gases in which methyl alcohol solution is injected; and c) injecting the methyl alcohol solution into the cooled untreated gases again. The invention also provides a low-temperature rectisol device, comprising a second jet bubbler, a first heat exchanger and a first jet bubbler, wherein the second jet bubbler injects the methyl alcohol solution into the untreated gases, the first heat exchanger cools the untreated gases in which the methyl alcohol solution is injected, and the first jet bubbler injects the methyl alcohol solution into the cooled untreated gases again. The low-temperature rectisol process provided by the invention injects the methyl alcohol solution into the untreated gases before cooling to ensure that methyl alcohol is atomized and blended into gaseous phase, and the freezing point of the untreated gases is lowered; when cooling, moisture in the untreated gases has small possibility of condensing, so that the phenomenon that tube bundles are blocked in the heat exchanger can not appear, and gas output does not decrease.

Description

technical field [0001] The invention relates to the technical field of gas purification, in particular to a process and a device for removing acid gas in coal gas by using low-temperature methanol as an absorbent. Background technique [0002] Because the acid gas will solidify and block the equipment pipeline during the cooling process of the raw material gas, it will poison the catalyst during the chemical synthesis process, and at the same time, because of its dilution, it will reduce the calorific value of the fuel gas or increase the power consumption of the gas transportation process, so the acid gas needs to be The gas is removed from the feed gas. The low-temperature methanol washing process is widely used in the purification of synthetic ammonia, synthetic methanol and other carbonylation, coal gas, industrial hydrogen production and natural gas desulfurization. Acid gases in gas, with emphasis on CO 2 and H 2 S, is a physical absorption process. [0003] Please...

Claims

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Application Information

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IPC IPC(8): B01D53/14C10K1/18
Inventor 吴昌祥刘福生佟黎明姜海潮钟启前杨玉满
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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