Deep control method and deep control device of pollutant in burning gas of ethane cracking furnace

An ethylene cracking furnace and deep control technology are applied in the purification and treatment of particulate pollutants and malodorous pollutants. The field of devices used to implement the method can solve the problems of inability to effectively control PM2.5 fine particle pollutants and inability to do anything about malodorous pollutants.

Active Publication Date: 2014-10-29
SHANGHAI HUACHANG ENVIRONMENT PROTECTION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this device is only suitable for capturing fine particle pollutants with a particle size of 10 μm or more, and cannot effectively control PM2.5 fine particle pollutants, and it is powerless for odor pollutants
[0007] To sum up, at present, the domestic ethylene industry has not developed a high-efficiency and low-consumption pollutant depth control technology to fill the technical gap in this field in China. This technology not only needs to control the concentration of pollutants in the coke gas to meet the standard, thereby improving the furnace Environment and atmospheric environment, and need to be simple to operate, easy to promote and use

Method used

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  • Deep control method and deep control device of pollutant in burning gas of ethane cracking furnace
  • Deep control method and deep control device of pollutant in burning gas of ethane cracking furnace

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Embodiment 1

[0059] A certain domestic ethylene plant adopted the device of this application.

[0060] Process flow:

[0061] Such as figure 1 shown.

[0062] Two-stage micro-cyclone separation is performed on the coke gas of the ethylene cracking furnace to remove coke powder and rust entrained in the gas; spray washing is performed on the coke gas desolidified by the two-stage cyclone to initially absorb and cool the gas odorous pollutants entrained in the air; the charred gas enters the micro-swirl absorber for deep absorption and cooling of the odorous pollutants and efficient separation and recovery of the absorbed rich liquid and odorous pollutant condensate; The absorbed rich liquid is regenerated for recycling.

Embodiment approach

[0064] After the cracking furnace of the ethylene plant is burnt online and after the burn is completed, it needs to go through the steam heat standby stage. At this time, the medium of the charred gas pipeline is diluted steam. After the cracking furnace is switched, the scorched pipeline is cooled during operation and scorched due to steam condensation The inner surface of the gas pipeline is corroded and rusted. When the pyrolysis furnace is scorched, especially during the switching of the cracking gas valve, the yellow-brown rust in the pipeline is easily discharged from the charred gas discharge chimney along with the large amount of steam, and adheres to the nearby steel structure, causing The scorched gas turns yellow. In addition, a large amount of coke powder particles are entrained in the coke gas, which makes the gas color black. In addition, about 1000 mg / m is also entrained in the gas 3 Odor pollutants, resulting in a pungent and unpleasant smell at the site of t...

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Abstract

The invention relates to a deep control method and a deep control device of a pollutant in burning gas of an ethane cracking furnace and provides a deep control method of a pollutant in burning gas of an ethane cracking furnace. The method comprises the following steps: (a) performing micro cyclone separation on the burning gas of the ethane cracking furnace so as to remove solid impurities in gas; (b) washing the gas obtained in the step (a) so as to preliminarily absorb and cool the stinky pollutant in the gas; (c) performing micro cyclone absorption and cooling on the gas obtained in the step (b) so as to deeply absorb and cool the stinky pollutant and absorb enriched liquid and stinky pollutant condensate to separate and recycle; (d) regenerating the absorption enriched liquid obtained in the step (c) for cycle use. The invention further provides the deep control device of pollutant in the burning gas of the ethane cracking furnace.

Description

technical field [0001] The invention belongs to the field of chemical energy and environmental protection, and relates to a method for controlling the depth of pollutants in the charred gas of an ethylene cracking furnace, in particular to a method for purifying and treating particulate pollutants and Method for malodorous pollutants, and apparatus for carrying out the method. Background technique [0002] Aiming at the common problem of air pollution of coke gas from cracking furnaces in ethylene plants, research and engineering demonstrations on the deep control technology of pollutants in coke gas will be carried out, which will ensure the health and environmental safety of operators, improve the external image of cracking furnaces, reduce Pollutant discharge is of great significance. [0003] As the leading equipment of the ethylene plant, the cracking furnace plays a pivotal role in the long, stable and full production of ethylene. Due to the limitation of the reactio...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D45/12
Inventor 李昌力汪华林沈其松侯瑞王海靖李剑平马良徐银香
Owner SHANGHAI HUACHANG ENVIRONMENT PROTECTION
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