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A biogas dry desulfurization device

A dry desulfurization and biogas technology, which is applied in separation methods, gas fuels, chemical instruments and methods, etc., can solve the problems of low desulfurization efficiency, cumbersome operation, low desulfurization efficiency, etc. The effect of utilization

Inactive Publication Date: 2021-01-19
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing desulfurization devices need to regularly detect H after desulfurization 2 S gas content, the operation is cumbersome; the desulfurization agent in the desulfurization tower or desulfurization tank is used unevenly from top to bottom, if the biogas flows into the desulfurization tower or desulfurization tank from bottom to top, the desulfurization agent at the bottom is more likely to fail, which greatly reduces the desulfurization efficiency. It is troublesome to replace only the desulfurizer at the bottom layer; during the operation, the biogas flow rate control is unavoidably unstable. Since it is a single-tank or single-tower desulfurization, the biogas flow rate is too high for a while, which may cause the desulfurizer to be penetrated instantaneously, reducing the hydrogen sulfide production. Removal rate, operating conditions are relatively strict
[0003] To sum up, the existing biogas desulfurization devices have low desulfurization agent utilization rate, H 2 Problems such as low S removal rate and low desulfurization efficiency make the device use effect unsatisfactory

Method used

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  • A biogas dry desulfurization device
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  • A biogas dry desulfurization device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Comparison of single-tank desulfurization and secondary cycle desulfurization

[0034] Conventional dry desulfurization devices usually have one desulfurization tank or two parallel desulfurization tanks, when the H at the gas outlet 2 S content>20mg / Nm 3 When the desulfurization agent has to be replaced or regenerated, the H at the gas outlet 2 The S content must be determined through repeated measurements, and the operation process is cumbersome; secondly, when the H at the outlet is measured 2 S gas content>20mg / Nm 3 When the desulfurization agent is used, the utilization rate of the desulfurization agent is not high, and it is greatly affected by the space velocity. The higher the space velocity, the lower the utilization rate of the desulfurization agent. The desulfurization agent layer cannot be fully desulfurized on the upper layer, which reduces the utilization rate of desulfurization agent.

[0035] In order to fundamentally improve the utilizatio...

Embodiment 2

[0047] Example 2 Desulfurization agent regeneration

[0048] The normal temperature iron oxide desulfurizer reacts with hydrogen sulfide to generate iron sulfide and elemental sulfur, thereby removing hydrogen sulfide. The chemical reaction equation is as follows: Fe 2 o 3 ·H 2 O+3H 2 S = Fe 2 S 3 ·H 2 O+3H 2 o

[0049] Fe 2 o 3 ·H 2 O+3H 2 S=2FeS+S+4H 2 o

[0050] From the above reaction equation, it can be seen that Fe 2 o 3 absorb H 2 S becomes Fe 2 S 3 , with the continuous generation of biogas, iron oxide absorbs H 2 S, when absorbing H 2 S reaches a certain amount, H 2 The removal rate of S will be greatly reduced until it fails. Fe 2 S 3 is reproducible, and O 2 and H 2 O undergoes a chemical reaction and can be reduced to Fe 2 o 3 , the regeneration principle is as follows:

[0051] 2Fe 2 S 3 ·H 2 O+3O 2 =2Fe 2 o 3 ·H 2 O+6S

[0052] By adjusting the opening of the second needle valve 32, the third needle valve 33, and the fourth nee...

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Abstract

The invention discloses a biogas dry type desulfurizing device. The biogas dry type desulfurizing device comprises five air through ports, five needle valves, four tee ball valves, three desulfurizingtanks, a rotor flowmeter, a fixing device and a movable device. The biogas dry type desulfurizing device has the advantages that by combining and switching the five needle valves and the four tee ball valves, the two functions of secondary circulating desulfurizing and desulfurizer regeneration can be respectively realized; the operation is safe, the utilization rate of chemical desulfurizers ishigh, the removal rate of hydrogen sulfide is high, the operation efficiency is high, and the biogas dry type desulfurizing device can be conveniently moved at site.

Description

technical field [0001] The invention relates to the field of gas desulfurization devices. Background technique [0002] Existing desulfurization devices need to regularly detect H after desulfurization 2 S gas content, the operation is cumbersome; the desulfurization agent in the desulfurization tower or desulfurization tank is used unevenly from top to bottom, if the biogas flows into the desulfurization tower or desulfurization tank from bottom to top, the desulfurization agent at the bottom is more likely to fail, which greatly reduces the desulfurization efficiency. It is troublesome to replace only the desulfurizer at the bottom layer; during the operation, the biogas flow rate control is unavoidably unstable. Since it is a single-tank or single-tower desulfurization, the biogas flow rate is too high for a while, which may cause the desulfurizer to be penetrated instantaneously, reducing the hydrogen sulfide production. The removal rate and operating conditions are rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81C10L3/10
CPCC10L3/103
Inventor 冯利利王东星贾荫楠汤思遥
Owner CHINA UNIV OF MINING & TECH (BEIJING)