Device and process for recovering sulfur by treating low-concentration acid gases

A technology for acid gas and sulfur recovery, applied in the preparation/purification of sulfur, sulfur compounds, inorganic chemistry, etc., can solve the problems of inability to meet emission requirements and high concentration, achieve small footprint, short process flow, and reduced operating costs Effect

Active Publication Date: 2019-08-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the flue gas SO directly emitted by such dry processes 2 The concentration is high, which cannot meet the emission requirements of the latest

Method used

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  • Device and process for recovering sulfur by treating low-concentration acid gases
  • Device and process for recovering sulfur by treating low-concentration acid gases
  • Device and process for recovering sulfur by treating low-concentration acid gases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A set of 6000 tons / year sulfur recovery device of coal chemical methanol plant adopts the present invention as figure 1 shown in the sulfur recovery unit for processing. The specific selection and loading amount of catalysts in each reactor are shown in Table 2 below.

[0071] Table 2 Catalyst loading

[0072]

[0073]

[0074] The 100% load of acid gas treated by sulfur plant is 2400m 3 / h, H 2 S volume content 20-30%, the rest is mainly CO 2 , with an appropriate amount of oxygen entering the sulfur furnace 1 for combustion. The temperature of the sulfur furnace 1 is controlled at about 1050°C. The process gas generated after combustion passes through the waste heat boiler 3 and is cooled. At the same time, 0.5MPa (g) low-pressure steam is generated. After the temperature drops to 320°C, it enters the primary condensing cooler 4 and cools down to 160°C. The condensed liquid sulfur is separated from the process gas at the outlet of the tube side, and flows o...

Embodiment 2

[0081] A set of 4000 tons / year sulfur recovery device of natural gas purification plant adopts the present invention as figure 1 shown in the sulfur recovery unit for processing. The specific selection and loading amount of catalysts in each reactor are shown in Table 3 below.

[0082] Table 3 Catalyst selection and loading

[0083]

[0084]

[0085] The 100% load of acid gas treated by sulfur plant is 650m 3 / h, H 2 S volume content 50-60%, the rest is mainly CO 2 The temperature of the combustion furnace is controlled at about 1050°C. The process gas generated after combustion is cooled after passing through the waste heat boiler 3. At the same time, 0.5MPa (g) low-pressure steam is generated, and the temperature of the process gas drops. After reaching 320°C, it enters the first-stage condensing cooler 4, and cools to 160°C. The condensed liquid sulfur is separated from the process gas at the outlet of the tube side, and flows out from the bottom into the sulfur ...

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Abstract

The invention belongs to the technical field of industrial sulfur recovery and specifically relates to a device for recovering sulfur by treating low-concentration acid gases and a process for recovering sulfur from low-concentration acid gases based on the device. The device for recovering sulfur by treating low-concentration acid gases is used for recovering and treating the acid gases through asulfur production unit, a tail gas treatment unit, a flue gas purification unit and a liquid sulfur degassing unit, and a catalyst in each stage of reactor is reasonably graded, so that the sulfur recovery rate of the overall recovery device is effectively increased; and by using the device for recovering sulfur, provided by the invention, the flue gas SO2 emission concentration can be stably lower than 20 mg/m<3> and even lower than 10 mg/m<3>, so that the flue gas SO2 emission concentration is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial sulfur recovery, and in particular relates to a device for processing low-concentration acid gas for sulfur recovery, and a process for recovering low-concentration acid gas sulfur based on the device. Background technique [0002] my country is a big coal country, and coal occupies an important position in my country's energy structure. Especially in recent years, in order to reduce the cost of hydrogen use, many chemical companies have vigorously developed coal-to-hydrogen devices to obtain cheap hydrogen sources. Good result. At the same time, my country is also vigorously developing coal chemical industry, and using coal as raw material to produce energy such as methanol, synthetic ammonia, coal-to-oil and olefins to ease the pressure on oil and gas resources. However, the commissioning of many coal chemical plants will inevitably bring low-concentration acid gas pollution, an environment...

Claims

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Application Information

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IPC IPC(8): C01B17/04
CPCC01B17/0452C01B17/0404C01B17/0426
Inventor 刘剑利刘爱华刘增让徐翠翠常文之陶卫东郝国杨吕才山
Owner CHINA PETROLEUM & CHEM CORP
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