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A device and process for treating coal-locked gas containing tar dust by supergravity method

A technology of supergravity method and water treatment device, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. Effect of service life, effect improvement

Active Publication Date: 2018-07-10
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a device and process for treating coal-locked gas containing tar and dust by supergravity method in order to solve the problems that the traditional tower is very easy to block the filler, the dust removal resistance is high, and the dust removal cannot be realized for fine particles.

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  • A device and process for treating coal-locked gas containing tar dust by supergravity method
  • A device and process for treating coal-locked gas containing tar dust by supergravity method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Xinjiang Guanghui New Energy Co., Ltd. carried out high-gravity dust removal treatment on synthetic ammonia coal lock gas. The tar dust content in the coal lock gas from the gas cabinet is 1000mg / m 3 , gas volume up to 20700Nm 3 / h, gas temperature ≤ 40°C, gas pressure 34kPa.

[0028] Using the supergravity method of the present invention to treat tar-containing dust-containing coal lock-up device to carry out tar-dust removal experiments on coal lock-up gas, in actual operating conditions, the gas-making circulating water is used as the purification medium, and the liquid consumption is only 8m 3 / h, the supergravity rotating packed bed adopts cross-flow supergravity rotating packed bed, the rotating speed is 800r / min; the gas-liquid ratio is 5000; the packing is wire mesh packing. The results show that the removal rate of tar coal dust can reach more than 97%. The dedusted gas enters the gas-liquid separator along the tangent line, removes a small amount...

Embodiment 2

[0029] Example 2: Technical transformation was carried out on the water gas imported from the 200,000-ton / year synthetic ammonia compressor of Guizhou Kailin Xifeng Synthetic Ammonia Phase I. The semi-water gas contained a small amount of dust, tar and elemental sulfur and other impurities. Use the supergravity method of the present invention to process the coal gas lock device containing tar dust to purify it, and its gas processing capacity is 20700m 3 / h, the temperature of semi-water gas is 15-45°C, and the concentration of tar dust is less than 100 mg / m 3 , its pressure is 20-45kPa. In the experiment, a high-gravity rotating packing bed with a diameter of 1600 was used as the dust removal equipment.

[0030] During the experimental operation, the cooling circulating water is used as the purification medium, the gas-liquid ratio of the semi-water gas flow rate and the cooling circulating water consumption is between 2500-3000, the high-gravity rotating packed bed is a cou...

Embodiment 3

[0031] Example 3: Purify and recover products from the ammonia-rich calcium dust tail gas of Tianji Coal Chemical Industry Group Co., Ltd. In the production process, the rotary drum fluidized bed granulation process is adopted, and the exhaust gas contains 3000mg / m 3 Calcium ammonium nitrate products can be regarded as dust particles, and the gas volume can reach 43000Nm 3 / h, the gas pressure reaches 150kPa, and the gas temperature is 0°C. The supergravity method of the present invention is used to treat the tar dust-containing coal gas lock device to purify tail gas and recycle calcium ammonium nitrate products. The supergravity device has a diameter of 1.6 meters and a height of 3.5 meters. In the operating condition, pipeline flushing water is used as the purification medium. The amount of flushing water in the pipeline is only 12t / h. The supergravity rotating packing bed is a countercurrent supergravity rotating packing bed. The packing is wire mesh packing, the rotating...

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Abstract

The invention belongs to the technical field of treatment of tar dust-containing coal gas, and provides a device and a process for treating the tar dust-containing coal gas in a super-gravity method, which aims at solving the problems of the traditional tower that the packing is extremely likely to block, the dust removal resistance is high, and the dust removal of tiny particulate matters cannot be realized. The coal gas and an absorption solution contact and react in a super-gravity rotating packing bed, and the tar dust is adsorbed in the absorption solution to be discharged, so that the tar dust is trapped and recovered. The weaknesses that the packing is likely to block and the removal rate is low are overcome, high efficiency and rapidness in mixing with liquid can be realized, and a rapid reaction environment is provided. By adopting the method, the operation gas-liquid ratio can be reduced, the reaction equipment is reduced, the introduction quantity of process water is greatly reduced, the self washing of the packing is realized, the reaction time and the equipment size are greatly reduced, the treatment effect is improved, the operation cost is reduced, and the reaction can be performed in small-sized equipment. The energy is saved, the resource is reutilized, and the environmental protection significance can be realized.

Description

technical field [0001] The invention belongs to the technical field of treating tar-dust-containing coal-lock gas, and in particular relates to a device and a process for treating tar-dust-containing coal-lock gas by a supergravity method. Background technique [0002] Coal lock gas is a kind of gas released when the coal lock is in a depressurized state during the process of adding coal in industrial production. Because the tar dust content in it can reach 100-1000mg / m 3 , causing blockage and inability to operate the subsequent process section. During the generation of coal-locked gas, the pressure is high, resulting in unstable air flow in the discharge port. The conventional method is to deal with the coal gas lock and light the sky lamp, and discharge it directly. This will cause environmental pollution, and the dust content will not be further treated. Today, with increasingly stringent environmental protection requirements, the traditional method can no longer effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D47/14
CPCB01D47/14
Inventor 刘有智祁贵生焦纬洲罗莹张巧玲袁志国栗秀萍申红艳高璟郭强
Owner ZHONGBEI UNIV