Polyethyleneglycol dimethyl ether desulfurizing system optimization extracting and concentrating technology

Abstract

The present invention discloses optimized concentration process of NHD desulfurization system, and has the advantages of environment friendship, high S recovering rate, reuse of recovered material, etc. The optimized concentration process includes: 1. feeding the rich NHD solution with absorbed hydrogen sulfide to the flash tank I; 2. connecting the flash tank I to the flashed gas pipeline in the gas phase outlet side of the flash tank II; 3. heating the rich solution from the flash tank II to 90-130 deg.c in a heat exchanger and high temperature decompression regenerating the rich solution in a low pressure flash tank at pressure lower than 30 KPa; 4. water cooling and separating flash gas from the low pressure flash tank, pressurizing to 50-150 KPa, mixing with flash gas from the flash tank II, pressurizing the gas mixture in desulfurizing flash machine, and returning to the concentrating tower system; and 5. regenerating the rich solution from the low pressure flash tank in a regenerating tower.

Description

technical field [0001] The invention relates to a new process for optimizing and concentrating polyethylene glycol dimethyl ether (NHD) desulfurization system, in particular to a process for making H in regeneration gas 2 The NHD desulfurization system with an S concentration of ≥50% optimizes the enrichment process. Background technique [0002] Coal is the main energy source in our country. With the continuous research and in-depth development of coal gasification technology at home and abroad in recent years, especially the rising price of anthracite, the traditional fixed seam coal gas production has been replaced by advanced high-efficiency gasification technology that adapts to the diversity of coal types. The use of high-sulfur coal as a raw material has become the development direction of coal chemical industry. [0003] At the same time, NHD desulfurization and decarbonization technology has high sulfur capacity, simple process, and low energy consumption. H in mi...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low desulfurization rate, serious air pollution, and high heat consumption of the regeneration tower in the current NHD desulfurization system flash process, and provide a simple and convenient method, which can realize environmental protection, improve the sulfur recovery rate of the purification system, and realize The NHD desulfurization system optimizes the enrichment process with the advantages of product recovery and resource utilization maximization

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