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Method for supplementing water for quench tower of acrylonitrile device

A quenching tower and acrylonitrile technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of unstable water supply for quenching towers, and achieve the effect of ensuring stability and ensuring work stability

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

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for supplementing the quenching tower water of an acrylonitrile plant, which solves the problem of unstable replenishment of quenching tower water

Method used

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  • Method for supplementing water for quench tower of acrylonitrile device
  • Method for supplementing water for quench tower of acrylonitrile device

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Embodiment approach

[0030] According to one embodiment of the present invention, the volume of the quenching water tank 1 is 10-60m 3 , limitedly, the volume of the quenching water tank 1 is 20-50m 3 . The flow rate of the quenching water pump 3 is 10-50m 3 / h, preferably, the flow rate of the quenching water pump 3 is 15-40m 3 / h. The operating pressure of the quenching tank is -0.49-0.06MPaG. And in the present invention, nitrogen gas is passed into the quenching water tank 1, and a split-range adjustment method is adopted to control the amount of nitrogen gas passing through the quenching water tank to control the pressure of the quenching water tank.

[0031] In the prior art, in the acrylonitrile plant, the reaction gas from the reaction gas cooler is sent to the bottom of the quench tower through the gas distribution plate, and is sent to the upper part of the quench tower with the circulation pump from the circulating liquid quench tower (in the present invention, it is Recovered wate...

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Abstract

The invention relates to a method for supplementing water for a quench tower of an acrylonitrile device. A quench water tank is arranged to collect recycled water from a four-effect evaporation unit,an ammonium sulfate concentration evaporation unit and a wastewater tank area; a quench water pump is arranged behind the quench water tank and is used for conveying the recycled water in the quench water tank to a quench tower; and a quench water spraying opening is formed in the top of the quench tower, the quench water spraying opening is connected with a water spraying distributor, and the recycled water is conveyed to the water spraying distributor in the quench tower through the quench water spraying opening. The method provided by the invention can ensure the stability of water supplement of the quench tower, prevent polymers entrained in the tower top gas phase from blocking components in the quench tower, and ensure the stable operation of the quench tower.

Description

technical field [0001] The invention belongs to the production process of acrylonitrile, and in particular relates to a method for replenishing water in the quenching tower of an acrylonitrile plant. 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. In addition, sulfuric acid is continuously added to the quenching tower to neutralize unreacted ammonia, and the dilute ammonium sulfate solution in the tower is pumped to the catalyst settling unit through the quenching tower. [0003] The quenching tower needs supplementary quenching water in the process of spraying and quenching the reaction gas. In the prior art, the quenching water is sent into In the quench tower. However, the source of the above-mentioned quenching water is unstable, if the flow of the quenching water from a certain source fluctuates, it will cause the flo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/58
CPCB01D53/78B01D53/58B01D2251/506
Inventor 石喆李大伟武力霍宝胜田春华刘俊凯邹明英陆玲
Owner 中石油吉林化工工程有限公司
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