Desulfurization and decarburization integrated absorption process for polyglycol dimethyl ether

A technology of polyethylene glycol dimethyl ether and glycol dimethyl ether, which is applied in the field of polyethylene glycol dimethyl ether desulfurization and decarbonization integrated absorption process, can solve the problems of large investment and many operating equipment, and achieves low investment. , less operating equipment, the effect of improving the regeneration effect

Inactive Publication Date: 2009-07-29
YANKUANG LUNAN CHEM FERTILIZER PLANT
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Problems solved by technology

However, in the design of NHD desulfurization and decarbonization process at home and abroad, the effect of NHD on H 2 S and CO 2 For problems such as solubility, desulfurization and decarburization have always ...

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  • Desulfurization and decarburization integrated absorption process for polyglycol dimethyl ether

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] figure 1 The technical process of the present invention is specifically described as follows:

[0027] 1. The raw material gas with a pressure of 2.0-6.5Mpa and a temperature of 20-25°C passes through the gas heat exchanger 19 to exchange heat with the purified gas after absorption, and the temperature is 5-20°C, and is sent to the absorption tower 1 after separation. The absorption tower 1 is in countercurrent contact with the NHD solution for full absorption. The lower section of absorption tower 1 is mainly the desulfurization section. The desulfurized gas enters the decarburization section through the gas lift cap, and the purified gas after decarburization (hydrogen sulfide≤2ppm, CO 2 ≤5%) at a temperature of about -10 to 15°C. After separation, the raw material gas is cooled by the ammonia cooler 2 to recover the cooling capacity, and the...

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Abstract

The invention discloses an NHD desulphurization-decarbonization absorption process. The invention is characterized in that the NHD desulphurization and decarbonization are finished in one absorption tower, systemic circulation is low, running equipment is less, and hydrogen sulphide at the outlet of the absorption tower is not more than or equal to 2ppm and CO2 index can be less than or equal to 5% according to follow-up product requirement. The concentration of the hydrogen sulphide in regenerated acid gas is over 70%, and the hydrogen sulphide can be directly used by downstream products. The invention has the advantages of simple process, reasonable energy utilization, convenient operation, low investment and small occupied space, and is suitable for the purification system for producing methanol, synthetic ammonia or other gases.

Description

technical field [0001] The invention relates to a poly(ethylene glycol dimethyl ether) (NHD) desulfurization and decarbonization combined absorption process, in particular to a poly(ethylene glycol dimethyl ether) solution for absorbing high-sulfur gas, which realizes desulfurization and decarbonization Integrate, and ensure that the concentration of hydrogen sulfide in the regenerated acid gas exceeds 70%. Background technique [0002] Polyethylene glycol dimethyl ether solvent is a kind of organic solvent, which is a mixture of polyethylene glycol dimethyl ether. In recent years, NHD desulfurization and decarbonization technologies have been widely used in China. However, in the design of NHD desulfurization and decarbonization process at home and abroad, the effect of NHD on H 2 S and CO 2 For problems such as solubility, desulfurization and decarburization have always been carried out separately. NHD desulfurization is followed by NHD decarburization, which is complet...

Claims

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Application Information

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IPC IPC(8): C10K1/18
Inventor 褚宏春叶盛芳梁雪梅芮胜波宋宪稳
Owner YANKUANG LUNAN CHEM FERTILIZER PLANT
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