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Acid gas desulfurization integrated method

A technology of acid gas and desulfurization tower, which is applied in the direction of chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of the number of equipment and control points, large floor area, and more electric energy, etc., to achieve obvious economy and Environmental benefits, small footprint and high desulfurization efficiency

Pending Publication Date: 2020-12-29
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For acid gas desulfurization, conventional processes are used to remove hydrogen sulfide in the gas. Due to the low pressure of acid gas, the rich liquid after desulfurization needs to be pumped to the regeneration tower and the regeneration process is carried out under normal pressure. The regenerated solution needs to be pumped To the absorption tower, so it consumes more electric energy, and has the disadvantages of long process, many equipment and control points, and large floor space.

Method used

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  • Acid gas desulfurization integrated method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The acid gas desulfurization integrated method described in the invention is used to remove hydrogen sulfide in the acid gas.

[0039] (1) Desulfurization device parameters: the height of the desulfurization tower (the height of the straight part) is 3700mm, and the inner diameter is 1000mm. The height of the porous guide tube is 1800mm, the inner diameter is 500mm, and the upper end of the guide tube is located at 3 / 5 of the height of the straight tube. The opening section of the guide tube is 1000m high, and there are 1570 circular holes with a diameter of 8mm evenly, and the total area of ​​the openings is 40% of the cross-sectional area of ​​the guide tube.

[0040] (2) Test conditions: the hydrogen sulfide content in the feed gas is 25.2g / Nm 3 , feed gas flow rate 6.5Nm 3 / h, air flow 3.5Nm 3 / h, the temperature of the desulfurization solution is 40°C, and the pH value of the desulfurization solution is 8.2. The iron concentration in the complex iron solution i...

Embodiment 2

[0043] (1) Desulfurization device parameters: the same as in Example 1.

[0044] (2) Test conditions: the hydrogen sulfide content in the feed gas is 72.8g / Nm 3 , feed gas flow rate 4Nm 3 / h, air flow 5.5Nm 3 / h, the temperature of the desulfurization solution is 40°C, and the pH value of the desulfurization solution is 8.2. The iron concentration in the complex iron solution is 0.3g / L, the alkali concentration is 15g / L, the stabilizer / total iron=0.8 molar ratio, the bactericide is 20ppm, the sulfur modifier is 50ppm, and the corrosion inhibitor is 0.5g / L.

[0045] (3) Desulfurization effect: Under the above test conditions, the air is continuously ventilated for 8 hours a day, and the average content of hydrogen sulfide in the outlet gas is determined to be 5 mg / Nm within 7 days of ventilating. 3 .

Embodiment 3

[0047] (1) Desulfurization device parameters: the same as in Example 1.

[0048] (2) Test conditions: the hydrogen sulfide content in the feed gas is 114.5g / Nm 3 , feed gas flow rate 3.5Nm 3 / h, air flow 6.5Nm 3 / h, the temperature of the desulfurization solution is 50°C, and the pH value of the desulfurization solution is 8.2. The iron concentration in the complex iron solution is 0.3g / L, the alkali concentration is 15g / L, the stabilizer / total iron=0.8 molar ratio, the bactericide is 20ppm, the sulfur modifier is 50ppm, and the corrosion inhibitor is 0.5g / L.

[0049] (3) Desulfurization effect: Under the above test conditions, the air is continuously ventilated for 8 hours a day, and the average hydrogen sulfide content of the outlet gas is determined to be 8 mg / Nm within 7 days of ventilating. 3 .

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Abstract

The invention belongs to the technical field of gas purification, and relates to an acid gas desulfurization integrated method; acid gas enters a desulfurization tower with a porous guide cylinder through a cyclone mixer, an ultrasonic generator is arranged on the side wall of the desulfurization tower, and the acid gas is in full contact with a desulfurization solution in the desulfurization tower; purified gas with hydrogen sulfide removed is emptied from the top of the tower, and rich liquor absorbing hydrogen sulfide is oxidized and regenerated with air discharged from an air distributor outside the porous guide cylinder. The invention has the advantages of equipment miniaturization, simple operation, investment saving, small occupied area, high desulfurization efficiency and the like,and can be used for treating acid gas or non-combustible gas which can be mixed with air.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and relates to a process for removing hydrogen sulfide from an acidic gas mixture, in particular to an oxidation-reduction desulfurization method under the integration of absorption and regeneration. Background technique [0002] The complex iron desulfurization technology has been applied in the fields of oilfield associated gas, natural gas, biogas and other fields by adopting conventional processes. The absorption tower and the regeneration part of the conventional process are independent of each other, and the purified natural gas enters the pipeline and is transported to the industrial gas device. For acid gas desulfurization, conventional processes are used to remove hydrogen sulfide in the gas. Due to the low pressure of acid gas, the rich liquid after desulfurization needs to be pumped to the regeneration tower and the regeneration process is carried out under normal pressure. Th...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/14B01D19/02
CPCB01D53/18B01D53/1468B01D53/1412B01D53/1425B01D19/02
Inventor 杨建平朱燕俞健健冯亚平
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD