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Fine desulfurization process by dry process for natural gas

A natural gas and refined desulfurization technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of limited desulfurization accuracy, high temperature desulfurization, high energy consumption, etc., to reduce energy consumption and cost, prolong regeneration cycle, and improve desulfurization The effect of precision

Active Publication Date: 2012-04-18
长春惠工净化工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The iron-manganese-zinc desulfurizer disclosed in CN8510355 can convert and absorb hydroxyl sulfide, carbon disulfide, mercaptan, sulfide and disulfide at a temperature of 350-400°C. Catalysis can use hydrogen without hydrogen, but although this technology overcomes the disadvantages of using hydrogen, it still has the disadvantages of high-temperature desulfurization, that is, high energy consumption and limited desulfurization accuracy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. The first stage of desulfurization is crude hydrogen sulfide desulfurization, using iron oxide desulfurizer at room temperature. 2 Hydrogen sulfide sulfur in the effluent of S reactor ≥ 10μg·g -1 When switching to the spare reactor, heat the original reactor to 80°C and ventilate naturally to regenerate the iron oxide desulfurizer at room temperature;

[0025] b. The natural gas that has been crudely dehydrogenated in the first stage enters the second-stage fine hydrogen sulfide removal reactor, using normal temperature zinc oxide desulfurizer. 2 Hydrogen sulfide sulfur in the effluent of S reactor ≥ 0.1μg·g -1 Switch to the spare reactor when the time comes, and replace the original reactor with a new room temperature zinc oxide desulfurizer;

[0026] c. The natural gas that has undergone the second-stage fine-removal of hydrogen sulfide enters the third-stage fine-removal organic sulfur reactor, using normal temperature NaX molecular sieve desulfurizer, when the ...

Embodiment 2

[0029] a. The first stage of desulfurization is crude hydrogen sulfide desulfurization, using iron oxide desulfurizer at room temperature. 2 Hydrogen sulfide sulfur in the effluent of S reactor ≥ 10μg·g -1 When switching to the spare reactor, heat the original reactor to 80°C and ventilate naturally to regenerate the iron oxide desulfurizer at room temperature;

[0030] b. The natural gas that has been crudely dehydrogenated in the first stage enters the second-stage fine hydrogen sulfide removal reactor, using normal temperature zinc oxide desulfurizer. 2 Hydrogen sulfide sulfur in the effluent of S reactor ≥ 0.1μg·g -1 Switch to the spare reactor when the time comes, and replace the original reactor with a new room temperature zinc oxide desulfurizer;

[0031] c. The natural gas that has undergone the second-stage fine-removal of hydrogen sulfide enters the third-stage fine-removal organic sulfur reactor, using normal temperature NaX molecular sieve desulfurizer, when the ...

Embodiment 3

[0034] a. The first stage of desulfurization is crude hydrogen sulfide desulfurization, using iron oxide desulfurizer at room temperature. 2 Hydrogen sulfide sulfur in the effluent of S reactor ≥ 10μg·g -1 When switching to the spare reactor, heat the original reactor to 40°C and ventilate naturally to regenerate the iron oxide desulfurizer at room temperature;

[0035] b. The natural gas that has been crudely dehydrogenated in the first stage enters the second-stage fine hydrogen sulfide removal reactor, using normal temperature zinc oxide desulfurizer. 2 Hydrogen sulfide sulfur in the effluent of S reactor ≥ 0.1μg·g -1 Switch to the spare reactor when the time comes, and replace the original reactor with a new room temperature zinc oxide desulfurizer;

[0036] c. The natural gas that has undergone the second-stage fine-removal of hydrogen sulfide enters the third-stage fine-removal organic sulfur reactor, using normal temperature NaX molecular sieve desulfurizer, when the ...

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Abstract

The invention relates to a fine desulfurization process by a dry process for natural gas. The process is three-stage normal-temperature fine desulfurization by the dry process for the natural gas: the first-stage desulfurization is crude removal of hydrogen sulfide, and uses a normal-temperature ferric oxide desulfurizer; the second-stage hydrogen sulfide fine removal reactors use a normal-temperature zinc oxide desulfurizer; and the third-stage organic sulfur fine removal reactors use a normal-temperature molecular sieve desulfurizer, wherein the normal-temperature ferric oxide desulfurizer and the normal-temperature molecular sieve desulfurizer can be regenerated for repeated use. The first-stage reactors, the second-stage reactors and the third-stage reactors must be one running reactor and one standby reactor which are mutually switched for use. The process prolongs the regeneration period of organic sulfur adsorbents, avoids the interference of inorganic sulfur on the absorption removal of the organic sulfur, reduces energy consumption and cost, and improves desulfurization accuracy.

Description

Technical field: [0001] The invention relates to a petrochemical technology, in particular to a natural gas dry fine desulfurization purification technology. Background technique: [0002] Sulfur in natural gas is mainly in the form of H 2 The form of S exists, but there are still a small amount of small molecule mercaptans, sulfides and disulfides, and a small amount of hydroxyl sulfur and carbon disulfide. These sulfides are collectively referred to as organic sulfides. The absorbent of sulfide in wet desulfurization is liquid, and the absorbent of sulfide in dry desulfurization is solid. Natural gas, oilfield gas, and refinery gas are used as chemical raw materials and fuels, and sulfides need to be removed. Dry desulfurization is more suitable for small and medium-sized enterprises, with small investment, simple process, convenient operation, and high sulfur removal accuracy. The desulfurizers used in dry desulfurization mainly include activated carbon desulfurizers, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10
Inventor 陆久民阎富山李红琳
Owner 长春惠工净化工业有限公司
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