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A way to remove h from gas 2 s and method for recovering sulfur

A sulfur and gas technology, which is applied in separation methods, gas treatment, sulfur preparation/purification, etc., can solve the problems of aggravated sulfide concentration inhomogeneity, sulfide desorption unevenness, etc., to avoid leakage risk, simple process, The effect of wide adaptability

Active Publication Date: 2022-07-22
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the desorption of sulfides during regeneration is inhomogeneous and varies with the thermal purge time
The treatment of the regenerated sulfur-containing gas is a difficult point in the arrangement of the entire molecular sieve desulfurization process, and the inhomogeneity of the sulfide concentration in the regenerated gas aggravates this difficulty

Method used

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  • A way to remove h from gas <sub>2</sub> s and method for recovering sulfur

Examples

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Effect test

Embodiment 1

[0021] Example 1: using modified 4A type molecular sieve adsorbent, containing H 2 S400mg / Nm 3 After the synthesis gas passes through the adsorption bed of the present invention, the H in it 2 S dropped to 3.6mg / Nm 3 , at 265 °C, SO was fed into the adsorbent bed 2 , the yield of sulfur was 91.2%.

Embodiment 2

[0022] Example 2: using modified Y-type molecular sieve adsorbent, containing H 2 S15%v, COS110mg / Nm 3 , Methyl mercaptan 80mg / Nm 3 After the natural gas passes through the adsorption bed of the present invention, the H 2 S dropped to 5.2mg / Nm 3 , the total sulfur dropped to 11.7 mg / Nm 3 , at 288 °C, SO was fed into the adsorbent bed 2 , the yield of sulfur was 90.3%.

Embodiment 3

[0023] Example 3: using modified 13A type molecular sieve adsorbent, containing H 2 S3.2%v, COS70mg / Nm 3 After the hydrogenation tail gas of the CLAUS unit passes through the adsorption bed of the present invention, the H 2 S dropped to 4.4mg / Nm 3 , the total sulfur dropped to 9.3 mg / Nm 3 , at 236 °C, pass SO into the adsorbent bed 2 , the yield of sulfur was 88.6%.

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Abstract

The invention belongs to the technical field of gas separation and provides a method for removing H in gas 2 S and the method for recovering sulfur, comprising the following steps: Step 1: the sulfur-containing gas passes through the adsorbent bed at normal temperature, wherein the H 2 S is adsorbed; step 2: H is adsorbed 2 After the adsorbent bed of S is heated to a certain temperature, SO is fed into the adsorbent bed. 2 , using the Claus principle, the adsorbed H 2 S is catalytically oxidized into elemental sulfur, the regeneration of the adsorbent is completed, and the sulfur vapor is cooled into solid sulfur after coming out of the adsorbent bed; Step 3: Pour sulfur-free gas into the regenerated adsorbent bed for replacement, and after the replacement is completed , the adsorbent will perform adsorption desulfurization again and enter the next cycle. The H in the degassing gas provided by the present invention 2 The method for recovering sulfur from S and S has a simple process, less public works, wide adaptability, and can remove H in the gas on the spot. 2 S and sulfur are recovered, avoiding the leakage risk caused by the centralized treatment of sulfur-containing gas with other desulfurization methods.

Description

technical field [0001] The invention belongs to the technical field of gas separation, and in particular relates to a method for removing H in gas 2 S and the method of recovering sulfur. Background technique [0002] H 2 S is a highly toxic and colorless combustible gas, which is widely found in natural gas, synthesis gas (water gas, shift gas, etc.), raw material gas for petroleum and its processing industry (such as catalytic dry gas, coking dry gas, cracked gas, liquefied gas, etc.), coke oven gas and other industrial gases. [0003] removal of H from gas 2 There are many methods for S, such as alkyl alcohol amine washing method, wet oxidation method, and various solid and liquid desulfurization agents. These desulfurization methods are respectively suitable for occasions with different sulfur content. [0004] For remote scattered gas wells and sulfur-containing gas wells in densely populated areas, there is a greater safety risk if the centralized treatment of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04C01B17/04
CPCB01D53/04C01B17/0404B01D2259/40088B01D2257/304
Inventor 朱道平周志斌余勇陈园园杨绪甲宋丽
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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