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Liquid-phase treatment process of tail gas from sulfur recovery

A technology for sulfur recovery tail gas and treatment process, applied in the direction of sulfur preparation/purification, etc., can solve the problems of high operating cost and energy consumption, low total sulfur recovery rate, large construction investment, etc., and achieves reduction in operating cost and energy consumption. The effect of reducing and improving sulfur recovery rate

Active Publication Date: 2013-02-27
SHANDONG SUNWAY PETROCHEMICAL ENGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The process has long process flow, large construction investment, high operating cost and energy consumption, and low total sulfur recovery rate

Method used

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  • Liquid-phase treatment process of tail gas from sulfur recovery
  • Liquid-phase treatment process of tail gas from sulfur recovery
  • Liquid-phase treatment process of tail gas from sulfur recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The sulfur production tail gas is generated after the acid gas recovers sulfur through the Claus sulfur recovery unit; the molar ratio of hydrogen sulfide and sulfur dioxide is controlled at 3:1, and the sulfur production tail gas enters the water film reactor, and the temperature of the reactor is controlled at 160±3°C. The reaction produces sulfur, producing H 2 S tail gas; contains H 2 S tail gas is in direct contact with water to cool down, and the condensed process wastewater is discharged to the outside; 2 S tail gas is heated to 190±3°C and enters the oxidation reactor for oxidation to produce process gas; the process gas enters the sulfur cooler for cooling, and then enters the water film reactor for further reaction, the temperature of the water film reactor is controlled at 160±3°C; the waste gas is incinerated rear discharge. The sulfur recovery rate is 99.98%.

Embodiment 2

[0041] The sulfur production tail gas is produced after the acid gas recovers sulfur through the Claus sulfur recovery unit; the molar ratio of hydrogen sulfide and sulfur dioxide is controlled at 4:1, and the sulfur production tail gas enters the water film reactor, and the temperature of the reactor is controlled at 170±3°C. The reaction produces sulfur, producing H 2 S tail gas; contains H 2 S tail gas is in direct contact with water to cool down, and the condensed process wastewater is discharged to the outside; 2 S tail gas is heated to 210±3°C and enters the oxidation reactor for oxidation to produce process gas; the process gas enters the sulfur cooler for cooling, and then enters the water film reactor for further reaction, the temperature of the water film reactor is controlled at 170±3°C; the waste gas is incinerated rear discharge. The sulfur recovery rate is 99.99%.

Embodiment 3

[0043]The sulfur production tail gas is generated after the acid gas recovers sulfur through the Claus sulfur recovery unit; the molar ratio of hydrogen sulfide and sulfur dioxide is controlled at 3:1, and the sulfur production tail gas enters the water film reactor, and the temperature of the reactor is controlled at 165±3°C. The reaction produces sulfur, producing H 2 S tail gas; contains H 2 S tail gas is in direct contact with water to cool down, and the condensed process wastewater is discharged to the outside; 2 S tail gas is heated to 200±3°C and enters the oxidation reactor for oxidation to produce process gas; the process gas enters the sulfur cooler for cooling, and then enters the water film reactor for further reaction, the temperature of the water film reactor is controlled at 165±3°C; the waste gas is incinerated rear discharge. The sulfur recovery rate is 99.98%.

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Abstract

The invention belongs to the technical field of sulfur recovery, and particularly relates to a liquid-phase treatment process of tail gas from sulfur recovery. The liquid-phase treatment process comprises the following steps: recovering sulfur from acid gas through a Claus sulfur recovery device to generate sulfur production tail gas; introducing the sulfur production tail gas into a water film reactor, wherein all the sulfur dioxide and excessive hydrogen sulfide react to generate sulfur and H2S-containing tail gas; enabling the H2S-containing tail gas to be in direct contact with water to cool the H2S-containing tail gas, and discharging the condensed process waste water; oxidating the H2S-containing tail gas in an oxidation reactor to generate in-process gas; cooling the in-process gas through a sulfur cooler, and then further reacting in the water film reactor; and incinerating the waste gas, and then discharging. According to the process, the water film reactor is utilized to solve the problem on sulfur fog collection, and the water film reaction is used in the sulfur production tail gas treatment for the first time, thereby greatly improving the sulfur conversion rate, greatly shortening the process, and greatly reducing the construction investment, the operating cost and the energy consumption.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery, and in particular relates to a liquid-phase treatment process for sulfur recovery tail gas. Background technique [0002] The raw material of Claus sulfur recovery unit mainly contains H 2 S acid gas. Enter the Claus sulfur recovery unit to recover sulfur. The total sulfur yield of the Claus unit is about 95-97%wt; the tail gas of sulfur production is discharged after hydrogenation reduction-absorption-incineration, and the total sulfur yield can reach 99.8%. above. [0003] According to the existing technology, the specific process of acid gas recovering sulfur through the Claus sulfur recovery unit to produce tail gas for sulfur production is as follows: the hydrogen sulfide gas in the upstream device is mixed with air, then enters the burner of the sulfur production furnace for combustion, and is generated by the waste heat boiler. Pressurized saturated steam recovers waste heat and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/04
Inventor 李铁军杨想全赵芳
Owner SHANDONG SUNWAY PETROCHEMICAL ENGINEERING CO LTD
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