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Treatment method of liquid sulfur degassing in sulfur recovery process

A technology for liquid sulfur degassing and sulfur recovery, which is used in sulfur preparation/purification, chemical industry, climate sustainability, etc., and can solve problems such as substandard discharge and unsatisfactory sulfur liquid sulfur degassing.

Active Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention proposes a process with low investment and low operating cost to reduce the sulfur recovery unit flue gas SO 2 Emission concentration, to solve the technical problems of unsatisfactory liquid sulfur degassing and substandard discharge in the existing sulfur recovery

Method used

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  • Treatment method of liquid sulfur degassing in sulfur recovery process
  • Treatment method of liquid sulfur degassing in sulfur recovery process
  • Treatment method of liquid sulfur degassing in sulfur recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Process flow like figure 1 As shown, it includes a thermal reaction stage, a catalytic reaction stage, a tail gas purification treatment stage, and a liquid sulfur degassing treatment stage.

[0047] 1) Thermal reaction stage:

[0048] Contains H 2 S: 30-100 (v / v)% of acid gas (1) and air (2) are partially burned into SO in the sulfur furnace (3) 2 , In the sulfur furnace (3) at high temperature (900-1400℃) H 2 S and SO 2 Claus reaction occurs to produce elemental sulfur and sulfur furnace tail gas (4). After element sulfur is condensed, it enters the non-degassed compartment (11-1) of the liquid sulfur pool (11) to recover liquid sulfur, and the sulfur furnace tail gas (4) enters Catalytic reaction stage. The sulphur furnace tail gas (4) The volume content of sulphur compounds is: H 2 S: 1-8%, SO 2 :0.5-4%, organic sulfur: 0-2%.

[0049] 2) Catalytic reaction stage:

[0050] The tail gas of the sulfur furnace (4) enters the primary converter (5) of the catalytic reaction stag...

Embodiment 2

[0058] Except for the following differences, the others are the same as in Example 1.

[0059] Process flow like figure 2 Shown.

[0060] The degassed waste gas (19) produced by the liquid sulfur degassing tower (17) and the sulfur-containing waste gas extracted by the steam ejector (21) are all introduced into the incinerator (13) and incinerated into SO 2 After being discharged through the chimney, the flue gas SO 2 Emission concentration 400-960mg / m 3 between. Hydrogen sulfide content in liquid sulfur and flue gas SO 2 The emission concentration is shown in Table 1.

Embodiment 3

[0062] Except for the following differences, the others are the same as in Example 1.

[0063] The liquid sulfur degassing tower (17) is closed, and the sulfur-containing waste gas volatilized on the top of the liquid sulfur pool is extracted only by the steam ejector (21), and the sulfur-containing waste gas is introduced into the hydrogenation reactor (9) for treatment. Hydrogen sulfide content in liquid sulfur and flue gas SO 2 The emission concentration is shown in Table 1.

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Abstract

The invention belongs to the technical field of sulfur recovery, and in particular relates to a liquid sulfur degassing treatment method. It includes the liquid sulfur degassing treatment stage: pressurize the non-degassed liquid sulfur collected in the non-degassed compartment of the liquid sulfur pool, and carry out a catalytic reaction with compressed air to remove the dissolved H2S in the liquid sulfur and degas the waste gas It is mixed with air and introduced into the sulfur furnace, and then returns to the thermal reaction stage to further recover elemental sulfur; the liquid sulfur after degassing is recovered and stored. The invention provides a high-efficiency, energy-saving and economical liquid sulfur degassing treatment method, and the SO2 emission concentration and H2S content are greatly reduced.

Description

Technical field [0001] The invention belongs to the technical field of sulfur recovery, and specifically relates to a treatment method for liquid sulfur degassing in a sulfur recovery process. Background technique [0002] With the development of society, environmental pollution has become a restrictive factor for rapid economic development. Industrial developed countries have very strict requirements for sulfur emissions. The US Federal Government Environmental Protection Agency regulations stipulate that the petroleum refining industry heating furnace flue gas, sulfur tail gas and catalytic cracking regeneration flue gas SO 2 The emission concentration limit is 50ppm(v), which is equivalent to 143mg / m 3 . Foreign countries have been studying the new technology of Claus process sulfur recovery tail gas treatment. In 2007, the United States issued a patent for the process of recovering sulfur from Claus tail gas by adsorption method (US7311891B2), which will contain SO 2 The tai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/04
CPCY02P20/10
Inventor 刘爱华王建华许金山刘剑利张义玲刘增让陶卫东
Owner CHINA PETROLEUM & CHEM CORP