Method for recovering sulfur and making hydrogen from hydrogen sulfide

A hydrogen sulfide and sulfur technology, which is applied in the preparation/purification of sulfur, electrolysis process, electrolysis components, etc., can solve the problem of difficulty in continuous and efficient absorption of hydrogen sulfide to recover sulfur, difficulty in hydrogen sulfide absorption rate reaching 100%, and insufficient gas-liquid contact. and other problems, to achieve the effect of improving resource utilization, prolonging gas-liquid contact time, and eliminating pollution

Inactive Publication Date: 2007-09-05
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the sulfur particles formed by oxidation are easy to block the nozzle (the particles are too fine or sticky), so the current operation is intermittent, and it is difficult to truly realize continuous and efficient absorption of hydrogen sulfide, recovery of sulfur and simultaneous production of hydrogen
Moreover, the research results show that the gas-liquid contact is not sufficient in such an absorption operation, the absorption rate of hydrogen sulfide is difficult to reach 100%, and the tail gas will still contain relatively high hydrogen sulfide
[0013] In addition, the current technical implementation has certain requirements for acid gas containing hydrogen sulfide, hydrogen sulfide content, and impurity components coexisting with hydrogen sulfide, which are subject to certain restrictions in practical application

Method used

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  • Method for recovering sulfur and making hydrogen from hydrogen sulfide
  • Method for recovering sulfur and making hydrogen from hydrogen sulfide
  • Method for recovering sulfur and making hydrogen from hydrogen sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Internal circulation jet absorber

[0056] Please refer to Fig. 3 and Fig. 4, this embodiment provides a simple and practical absorption reactor.

[0057] The absorption reactor 20 is composed of a nozzle 21 and a reaction tube 22. The nozzle 21 is composed of an inner tube 211 and a sleeve 212. The inner tube 211 is basically a hollow tube with a liquid inlet 2111 at the upper end and a tapered liquid outlet 2112 at the lower end. , the sleeve 212 is sleeved outside the inner tube 211, the upper part is closed with the outer wall of the inner tube, and the lower part is connected to the outside world. There is an annular gap 213 between the sleeve 212 and the inner tube 211, and the side wall of the sleeve 212 is suitable There is a gas inlet 2121 in communication with the annulus 213; as shown in FIG. 4 , the length of the inner tube 211 is slightly longer than that of the casing 212, and the liquid outlet 2112 at the lower end extends out of the casing 212...

Embodiment 2

[0062] Embodiment 2: The process of simultaneously recovering sulfur and hydrogen from acid gas containing hydrogen sulfide using double reactors

[0063] Please refer to Figure 5 for the specific process, which mainly consists of three parts: absorption, separation and electrolytic regeneration. The specific description is as follows:

[0064] The acid gas containing hydrogen sulfide is metered and passed into the absorption reactor 20, and the absorption liquid (containing Fe 3+ The solution) is also sent to the absorption reactor 20 after being metered. By controlling the appropriate liquid / gas volume ratio, the absorption liquid carries the gas into the absorption reactor 20 in a jetting manner, and the oxidation reaction of the two in the reactor causes the hydrogen sulfide is absorbed to generate sulfur, and the Fe in the absorption liquid 3+ is reduced to Fe 2+ (At least partially reduced), the absorption liquid becomes the liquid to be regenerated at this time, and ...

Embodiment 3

[0070] The operation process is as described in Example 2, and the hydrogen sulfide gas velocity and absorption liquid (FeCl 3 ) flow rate to measure the hydrogen sulfide absorption rate under different absorption conditions.

[0071] 1. The gas velocity of acid gas (including hydrogen sulfide) is 40-100L / h, the liquid phase flow rate is 300-500L / h, the liquid / gas volume ratio is controlled within the range of 3-10, and the Fe in the absorption liquid is 3+ The concentration is about 0.6M, Fe in the absorption solution 2+ The concentration is about 0.6M, the hydrogen ion concentration is about 8M (HCl system), the absorption reaction is normal pressure, and the temperature is 40°C.

[0072] Record respectively the hydrogen sulfide content in the acid gas entering the absorption reactor and the tail gas discharged from the reactor (fixed liquid phase flow rate, changing the gas velocity of the acid gas), calculate the absorption rate (%) of hydrogen sulfide, and obtain the cur...

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Abstract

A process for recovering sulfur and preparing H2 from the hydrogen sulfide at same time is characterized by that an internal circulation absorption type reactor and an electrolyzing reactor with dual electrode plates are simultaneously used for the oxidizing absorption reaction and electrolytic regeneration reaction.

Description

technical field [0001] The invention relates to a method for recovering sulfur and hydrogen from hydrogen sulfide gas, in particular to a method for combining hydrogen sulfide absorption technology with indirect electrolysis technology and realizing simultaneous production of sulfur and hydrogen through recycling of absorbents. Background technique [0002] During the secondary processing of sour crude oil, most of the sulfide in crude oil is converted into hydrogen sulfide, which exists in the refinery tail gas. If the hydrogen sulfide is discharged directly into the atmosphere without treatment, it will cause serious environmental pollution. With the increase in the processing of high-sulfur crude oil and the country's increasing emphasis on environmental protection, especially in recent years, high-sulfur gas fields have emerged continuously (for example, the content of hydrogen sulfide in Weiyuan natural gas mine in Sichuan is about 4.8%, Zhao Lanqing in Hebei The conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/02C25B1/02
Inventor 俞英黄海燕李发永曹作刚
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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