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Method for removing organic matters in decarburization unit of coal-to-liquid device

A coal-to-oil and organic matter technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of solution foaming, flooding of liquid, affecting the safe operation of decarbonization effect devices, etc. Simple process effect

Pending Publication Date: 2021-04-06
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

In the cycle gas entering the decarbonization system, due to side reactions in the pre-order reaction process, the Fischer-Tropsch synthesis cycle gas contains about 1% alcohols, acids, and ketones, so a large amount of organic substances will be brought into the decarbonization system. If there is no proper way to remove organic matter, the organic matter will continue to accumulate in the decarbonization system, which will easily cause the solution to foam and flood, which will affect the decarburization effect and the safe operation of the device

Method used

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  • Method for removing organic matters in decarburization unit of coal-to-liquid device
  • Method for removing organic matters in decarburization unit of coal-to-liquid device
  • Method for removing organic matters in decarburization unit of coal-to-liquid device

Examples

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Effect test

Embodiment 1

[0028] Three layers of trays are installed on the top of the water washing tower, and the total gas volume of the circulating gas before entering the tray washing is about 15256.6Kmol / h, and the main components are hydrogen, carbon monoxide, water and carbon dioxide. The specific components are shown in Table 1 (before washing), The operating pressure is about 1.7MpaG, the gas temperature is about 40°C, and 3 tons of regeneration gas condensate is introduced on the tray. After the regeneration gas is washed with washing water, the concentration of organic matter drops by about 91%. The specific composition after washing is shown in Table 1 ( after washing). After the circulating gas is washed with water, the content of organic matter in the subsequent absorption tower is greatly reduced. In addition, the washing water rich in organic matter is sent to water treatment. The concentration of organic matter is high and the water volume is small, which is convenient for treatment. ...

Embodiment 2

[0031] Three layers of trays are installed on the top of the water washing tower, and the total gas volume of the circulating gas before entering the tray washing is about 15256.6Kmol / h, and the main components are hydrogen, carbon monoxide, water and carbon dioxide. The specific components are shown in Table 2 (before washing), The operating pressure is about 1.9MpaG, the gas temperature is about 40°C, and 3 tons of regeneration gas condensate is introduced on the tray. After the regeneration gas is washed with washing water, the concentration of organic matter drops by about 93%. The specific composition after washing is shown in Table 2 ( after washing). After the circulating gas is washed with water, the content of organic matter in the subsequent absorption tower is greatly reduced. In addition, the washing water rich in organic matter is sent to water treatment. The concentration of organic matter is high and the water volume is small, which is convenient for treatment. ...

Embodiment 3

[0034] A layer of packing is set on the top of the water washing tower, in which the total gas volume of the circulating gas is about 15256.6Kmol / h before entering the tray washing, the main components are hydrogen, carbon monoxide, water and carbon dioxide, the operating pressure is about 1.9MpaG, and the gas temperature is about At 40°C, 3 tons of regeneration gas condensate was introduced on the tray. After the regeneration gas was washed with washing water, the concentration of organic matter dropped by about 92%. After the circulating gas is washed with water, the content of organic matter in the subsequent absorption tower is greatly reduced. In addition, the washing water rich in organic matter is sent to water treatment. The concentration of organic matter is high and the water volume is small, which is convenient for treatment.

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Abstract

The invention discloses a method for removing organic matters in a decarburization unit of a coal-to-liquid device. The decarburization unit of the coal-to-liquid device comprises a water washing tower, the method is characterized in that at least two layers of tower plates or packing layers are arranged in the middle cavity of the washing tower, the tower plates or the packing layers are installed in a left-right staggered mode, and when liquid passes through the washing tower, the liquid sequentially passes through the tower plates or the packing layers through baffling; circulating gas from the outside enters from the gas inlet in the bottom of the washing tower, and washing water from the outside is introduced from the upper parts of all tower plates or packing layers of the washing tower; the treated recycle gas is discharged from a gas outlet in the top of the washing tower; a washing water outlet is formed in the bottom of the washing tower. The organic matters are removed, the organic matters are removed at the highest concentration in the whole decarburization device, the water consumption is minimum, the removal amount is highest, washing water can be sent out of sewage for treatment, and the organic matters in the water can also be sent out for continuous recovery.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a method for removing organic matter in a decarbonization unit of a coal-to-oil plant. Background technique [0002] The Fischer-Tropsch synthesis process uses coal or natural gas as a raw material to indirectly synthesize liquid fuels. In the Fischer-Tropsch reaction, H 2 While CO and CO generate hydrocarbon products on the reduced catalyst, water is also generated during the reaction process, and water and CO undergo a water-gas shift reaction to generate a large amount of CO 2 . Therefore, after the product is separated from the gas out of the synthesis reactor, the remaining tail gas must be freed of CO before being recycled. 2 . Since the content of hydrocarbons in the cycle gas accounts for about 22.97%, it is necessary to reduce the loss of hydrocarbons in the decarburization process. Foreign experts compared the advantages, disadva...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1487B01D53/1493
Inventor 张叶徐莉
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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