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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

Active Publication Date: 2016-02-24
SHANGHAI INT ENG CONSULTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach not only increases the methanol consumption, but also increases the NH 3 content, affecting the absorption capacity of lean liquid methanol, thus greatly increasing the treatment cost of sewage methanol
[0007] C. The low-temperature condensation method used at the top of the traditional low-temperature methanol washing heat regeneration tower recovers methanol, and the loss of methanol is relatively large

Method used

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

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Effect test

Embodiment 1

[0040] image 3 It is a schematic process flow diagram of the low-temperature methanol washing heat regeneration system described in Example 1 of the present invention, as image 3 Shown:

[0041] from H 2 The bottom of the S enrichment tower is rich in H 2 The S methanol solution enters the thermal regeneration tower 1 after being reheated. The gas phase at the top 1 of the thermal regeneration tower enters the H 2 After the S water cooler 2 is partially condensed, it enters the gas phase separator 3 at the top of the thermal regeneration tower. One liquid phase returns to the thermal regeneration tower 1, and the other liquid phase enters the alcohol ammonia separation tower 14. The gas phase enters the bottom of the methanol water washing tower, and the waste water at the bottom of the tail gas washing tower enters the top of the methanol water washing tower from the inlet 121 as a washing solution. The gas phase washed with methanol is sent to the downstream sulfur rec...

Embodiment 2

[0056] Figure 4 It is a schematic process flow diagram of the low-temperature methanol washing heat regeneration system described in Example 2 of the present invention, as Figure 4 Shown:

[0057] from H 2 The bottom of the S enrichment tower is rich in H 2 The S methanol solution enters the thermal regeneration tower 1 after being reheated. The gas phase at the top of the thermal regeneration tower enters the H 2 After the S water cooler 2 is partially condensed, it enters the gas phase separator 3 at the top of the thermal regeneration tower. One liquid phase is returned to the thermal regeneration tower 1, and another liquid phase is discharged to the bottom of the alcohol ammonia separation tower 14. The gas phase enters the bottom of the methanol water washing tower 10, and the waste water at the bottom of the tail gas washing tower enters the top of the methanol water washing tower from the inlet 121 as a washing solution. The gas phase washed with methanol is se...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10K1/16
Inventor 章华勇顾鹤燕吴彩平金力强
Owner SHANGHAI INT ENG CONSULTING
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