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Sulfur recovery device washing water recycling system and sulfur recovery device washing water recycling method

A technology for sulfur recovery and washing water, applied in the field of coal chemical industry, can solve the problems of high methanol content, high energy consumption, large pollution, etc., and achieve the effects of increasing the amount of washing water, improving the recovery efficiency, and stabilizing the operation level

Inactive Publication Date: 2019-12-31
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of high methanol content in sulfur recovery acid gas wash water in the prior art, large acid waste water treatment capacity, high energy consumption and large pollution, and provide a sulfur recovery device wash water recovery and reuse system and method, the system can recover the methanol entrained in the acid gas, improve the recovery rate of methanol, and reduce the defects of catalyst life reduction and waste water treatment cost increase due to excess methanol in the waste water, and greatly reduce the Water Consumption in Sulfur Recovery Process

Method used

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  • Sulfur recovery device washing water recycling system and sulfur recovery device washing water recycling method

Examples

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Effect test

Embodiment approach

[0077] Such as figure 1 As shown, the washing water recovery and reuse system of the sulfur recovery unit includes a methanol scrubber tail gas scrubber T1, an acid gas scrubber T2, a methanol-water separation tower T3, a first transfer pump P1, a second transfer pump P2 and a heat exchange system E1;

[0078] The methanol tail gas scrubber T1 is communicated with the acid scrubber T2 through the first transfer pump P1 through a pipeline;

[0079] The acid washing tower T2 is connected with the methanol-water separation tower T3 via the second transfer pump P2 through a pipeline.

[0080] The heat exchange system E1 is in communication with the second transfer pump P2 and the methanol-water separation tower T3 respectively through pipelines.

[0081] Further, the desalted water from the bottom of the methanol scrubbing tail gas scrubber T1 is transferred to the top of the acid gas scrubber T2 through the transmission of the first transfer pump P1, and is reversely contacted w...

Embodiment 1

[0086] Such as figure 1 As shown, the washing water recovery and reuse system of the sulfur recovery unit includes a methanol scrubber tail gas scrubber T1, an acid gas scrubber T2, a methanol-water separation tower T3, a first transfer pump P1, a second transfer pump P2 and a heat exchange system E1;

[0087] The methanol tail gas scrubber T1 is communicated with the acid scrubber T2 through the first transfer pump P1 through a pipeline;

[0088] The acid washing tower T2 is connected with the methanol-water separation tower T3 via the second transfer pump P2 through a pipeline.

[0089] The heat exchange system E1 is in communication with the second transfer pump P2 and the methanol-water separation tower T3 respectively through pipelines.

[0090] Further, the desalted water with a methanol content of 0.5wt% from the bottom of the methanol scrubber T1 is transferred to the top of the acid gas scrubber T2 through the transmission of the first transfer pump P1, and the acidi...

Embodiment 2

[0094] Such as figure 1 As shown, the washing water recovery and reuse system of the sulfur recovery unit includes a methanol scrubber tail gas scrubber T1, an acid gas scrubber T2, a methanol-water separation tower T3, a first transfer pump P1, a second transfer pump P2 and a heat exchange system E1;

[0095] The methanol tail gas scrubber T1 is communicated with the acid scrubber T2 through the first transfer pump P1 through a pipeline;

[0096] The acid washing tower T2 is connected with the methanol-water separation tower T3 via the second transfer pump P2 through a pipeline.

[0097] The heat exchange system E1 is in communication with the second transfer pump P2 and the methanol-water separation tower T3 respectively through pipelines.

[0098] Further, the desalted water with a methanol content of 0.1wt% from the bottom of the methanol scrubber T1 is transferred to the top of the acid gas scrubber T2 through the transmission of the first transfer pump P1, and the acidi...

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Abstract

The invention relates to the technical field of coal chemical industry, and discloses a sulfur recovery device washing water recycling system and a sulfur recovery device washing water recycling method. The system comprises a methanol washing tail gas washing tower (T1), an acid gas washing tower (T2), a methanol-water separation tower (T3), a first transmission pump (P1) and a second transmissionpump (P2), wherein the methanol tail gas washing tower (T1) is communicated to the acid washing tower (T2) through the first transmission pump (P1) by a pipeline, and the acid washing tower (T2) is communicated to the methanol-water separation tower (T3) through the second transmission pump (P2) by a pipeline. According to the system of the invention, methanol entrained in the acid gas can be recovered, such that the recovery rate of methanol is increased, and the defects that the service life of the catalyst is shortened and the wastewater treatment cost is increased due to the excessive methanol contained in wastewater are overcome, and the consumption of water in the sulfur recovery process is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a washing water recovery and reuse system of a sulfur recovery device and a method thereof. Background technique [0002] In the prior art, in the sulfur recovery unit, the temperature of the acid gas regenerated by washing with low-temperature methanol is relatively high, and the amount of methanol entrained in the acid gas is too large. The methanol content of the acid water sent out of the acid gas scrubber bottom of the sulfur recovery unit can reach up to 45%. A large amount of methanol is lost, even after washing, the methanol content in the acid gas is still as high as 2.95%. However, sending the above-mentioned acid gas containing a large amount of methanol into the sulfur recovery combustion furnace is easy to generate carbon, which leads to carbon on the surface of the catalyst, greatly shortens the service life of the catalyst, and reduces the sulfur rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/18
CPCC02F1/02C02F1/66C02F2103/18
Inventor 周全胜赵立军邱守贤吴冬王亮丁鹏王英胡晓川马自有巩晓东胥伟华赵斌
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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