A device and method for treating low-temperature methanol washing ammonium crystallization and purifying barren liquid methanol

A technology of low-temperature methanol washing and methanol water washing tower, which is applied in the fields of combustible gas purification, combustible gas purification/transformation, petroleum industry, etc., can solve problems such as affecting the absorption capacity of lean liquid methanol, increasing the cost of sewage methanol treatment, and increasing methanol consumption, etc. Achieve the effect of promoting recycling, reducing cooling consumption and improving safety
CN104140852BActive Publication Date: 2016-02-24SHANGHAI INT ENG CONSULTING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI INT ENG CONSULTING
Publication Date
2016-02-24

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Abstract

The invention discloses a device for treating low temperature methanol washing ammonium crystallization and purifying barren solution methanol and a method for treating low temperature methanol washing ammonium crystallization and purifying barren solution methanol by virtue of the device. The device comprises a thermal regeneration tower of which the top is not provided with a low-temperature condenser, wherein a gas outlet formed in the top of the thermal regeneration tower is communicated with a gas phase separator by virtue of a water cooler, a gas phase outlet of the gas phase separator is communicated with a methanol water-washing tower; the bottom of the gas phase separator is provided with a liquid phase outlet communicated with a liquid phase delivery pipeline, the liquid phase delivery pipeline is divided into two paths, one of which returns back to the top of the thermal regeneration tower and the other is communicated with a methanol-ammonium separation tower. According to the device and the method, by adopting the normal temperature water washing manner, the problems that the condenser and the pipeline arranged on the top of the thermal regeneration tower are blocked by the crystallization of ammonium carbonate in the traditional flow process is solved and the problem of the treatment of intermittent pollution discharge methanol is further solved and thus barren solution methanol is purified and the methanol consumption is reduced.
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Description

technical field

[0001] The invention relates to the field of coal gasification synthesis gas, in particular to a method and device for treating ammonium bicarbonate crystallization in a low-temperature methanol washing heat regeneration system and further purifying lean liquid methanol. Background technique

[0002] Coal gasification is a kind of coal or coal char as raw material, oxygen (air, oxygen-enriched or pure oxygen), water vapor or hydrogen as gasification agent, under high temperature conditions through chemical reaction to combustible coal or coal char The process of partial conversion to gaseous fuel. Coal gasification technology has been widely used due to the characteristics of my country's resources with more coal and less gas. Among them, low-temperature methanol washing is also widely used in gas purification devices or systems such as synthetic ammonia, synthetic methanol, city gas and natural gas desulfurization due to its strong applicability and cheap a...

Claims

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