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Method for removing acidic liquid in gas phase at top of quench tower of acrylonitrile device

A cooling tower, acrylonitrile technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as affecting the service life of equipment and equipment, ammonium sulfate cannot be removed, and incineration tail gas does not meet environmental protection standards.

Pending Publication Date: 2021-03-05
中石油吉林化工工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the quenching tower, a large amount of liquid foam will be entrained in the gas phase at the top of the tower, and ammonium sulfate is contained in the liquid foam. ), will greatly affect the service life of the follow-up equipment
Moreover, ammonium sulfate cannot be removed in subsequent devices, and finally enters the waste liquid incinerator through the four-effect evaporation unit, and there will be a problem that the incineration tail gas does not meet environmental protection standards

Method used

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  • Method for removing acidic liquid in gas phase at top of quench tower of acrylonitrile device
  • Method for removing acidic liquid in gas phase at top of quench tower of acrylonitrile device
  • Method for removing acidic liquid in gas phase at top of quench tower of acrylonitrile device

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Embodiment Construction

[0029] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

[0030] When describing the embodiments of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship expressed by "horizontal", "top", "bottom", "inner" and "outer" is based on the orientation or positional relationship shown in the relevant drawings, which are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particu...

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Abstract

The invention relates to a method for removing acidic liquid in a gas phase at the top of a quench tower of an acrylonitrile device. A first-layer gas-liquid separation tower internal part and a second-layer gas-liquid separation tower internal part are arranged in the top of a quench tower, a quench tower demister is arranged between a quench tower top gas phase outlet and an inlet of a quench after-cooler, and a quench tower top gas phase passes through the quench tower top gas phase outlet to the quench tower demister and then is sent into the quench after-cooler. The method provided by theinvention can effectively remove the acidic liquid in the gas phase at the top of the tower.

Description

technical field [0001] The invention belongs to the production process of acrylonitrile, in particular to a method for removing acidic liquid in the gas phase of the quenching tower top of an acrylonitrile device. Background technique [0002] In the acrylonitrile plant, the reaction gas enters the quench tower through the reaction gas cooler, and the reaction gas is quenched by spraying the circulating liquid. At the same time, sulfuric acid is continuously added to the quench tower to neutralize the unreacted ammonia, and the dilute ammonium sulfate solution in the tower tank is circulated and pumped to the catalyst settling unit through the quench tower. [0003] In the quenching tower, the reaction gas contacts the quenching water from bottom to top, and is sent out of the quenching tower from the gas phase pipeline at the top of the tower to the after-quenching cooler. In the quenching tower, a large amount of liquid foam will be entrained in the gas phase at the top o...

Claims

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Application Information

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IPC IPC(8): B01D53/58B01D53/78B01D45/12
CPCB01D53/78B01D53/58B01D45/12B01D2251/506
Inventor 石喆刘清娟尹三琴耿金伟王荣伟杨超唐伟强陆玲
Owner 中石油吉林化工工程有限公司
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