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Integrated sour gas treating process

A treatment process and tail gas treatment technology, which is applied in the preparation/purification of hydrogen sulfide and sulfur, can solve the problems of secondary pollution, large consumption of lye, etc., achieve high sulfur recovery rate, low energy consumption, and flexible process operation Effect

Active Publication Date: 2012-12-26
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Its main disadvantages are the large consumption of lye, the lye that absorbs the acid gas will cause secondary pollution, and it is only suitable for the treatment of acid gas with low latent sulfur content. At present, this method is rarely used in the treatment of acid gas in the natural gas process

Method used

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Embodiment Construction

[0022] Such as Figure 1 to Figure 4 As shown, the devices involved in the process of the present invention include: absorption tower (ABT) 1, incineration device (INCT) 2, lean-rich liquid heat exchanger (EXG) 3, regeneration tower (RET) 4, condenser (CL1) 5 , Reflux tank (SEP) 6, combustion furnace (RF) 7, waste heat boiler (WHE) 8, primary condenser (CD1) 9, primary reheater (RH1) 10, primary reactor (CV1) 11, Secondary condenser (CD2) 12, secondary reheater (RH2) 13, secondary reactor (CV2) 14, final condenser (CD3) 15, online combustion furnace (RGG) 16, hydrogenation reduction reactor (HBED) 17. Precooler (CL2) 18. Quenching tower (QTWR) 19. Small acid gas concentration device (ABSA) 20. Amine absorption tower (ABT2) 21. Compressor (CMP) 22. Storage tank ( AMT) 23 et al.

[0023] The purpose of the present invention is to produce low concentration H for natural gas deep desulfurization and decarburization process 2 S sour gas working condition, specially developed sou...

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Abstract

The invention discloses an integrated sour gas treating process, and aims at the sour gas which contains light concentration H2S and is generated in a desulfuration decarburization device. The integrated sour gas treating process comprises the following steps of: adding a sour gas concentrating segment before a two-level Claus sulfur recovery segment, concentrating the H2S concentration in sour gas to more than 50%, and enabling the sour gas after concentrating to enter the two-level Claus sulfur recovery segment to carry out reaction, wherein the sulphur recovery rate of a sour gas concentrating + sulfur recovery segment is improved by 1%-2% compared with the general two-level Claus sulfur recovery segment, thereby being beneficial for sulfur recovery to obtain high sulfur recovery ratio. The integration sour gas treating process provided by the invention has the advantages that the technological operation is flexible and reliable, the investment is saved, the energy consumption is low, the total sulfur recovery ratio can achieve more than 99.8%, and the strict environmental standard requirements are met.

Description

technical field [0001] What the present invention relates to is a kind of natural gas processing plant treatment containing low concentration H 2 S acid gas integration process technology. Background technique [0002] For H 2 The natural gas produced in the S gas field generally adopts the amine method and the sulfone amine method to remove H in the natural gas. 2 S, however, the H contained in the desulfurization solution 2 S acid gas must be treated to meet the environmental discharge standards before it can be discharged. Generally, according to the H in the acid gas precipitated during the desulfurization and decarburization process 2 The amount of S content depends on the choice of sour gas treatment process. [0003] In general, for H 2 The relatively high-concentration acid gas with S content greater than 50 mol % mostly enters Claus (Claus) unit to convert hydrogen sulfide into elemental sulfur by direct flow method. The main feature of the once-through metho...

Claims

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Application Information

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IPC IPC(8): C01B17/05C01B17/16
Inventor 刘家洪冼祥发周明宇张庆林谌天兵肖秋涛韩淑怡李海荣陆永康钟志良宋东辉毛莉君
Owner BC P INC CHINA NAT PETROLEUM CORP
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