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Adipic acid production device tail gas treatment device and method

A production device and tail gas treatment technology, which is applied in the field of tail gas treatment devices of adipic acid production devices, can solve problems such as large amount of nitric acid, and achieve the effects of environmental friendliness, reduction of production costs, and maximization of economic benefits.

Pending Publication Date: 2020-04-17
CHINA TIANCHEN ENG
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The domestic production of adipic acid mainly adopts the nitric acid oxidation method. The cyclohexanol or alcohol and ketone mixture is oxidized by nitric acid to produce adipic acid. This method has mature technology, and the product yield and purity are relatively high. A lot of N 2 o

Method used

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  • Adipic acid production device tail gas treatment device and method
  • Adipic acid production device tail gas treatment device and method

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Experimental program
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Effect test

Embodiment 1

[0068] The tail gas composition of an adipic acid plant is shown in the following table:

[0069]

[0070] The 583kg / h raw material tail gas of the above components is washed by a 20% lye circulating alkali, and then washed twice by a water washing tower to prevent the lye from entering the pretreated raw material gas.

[0071] The pretreated raw gas enters the separator, after metering, component detection and pressure adjustment, it enters the raw gas compressor (the set pressure of the tail gas pressurization system is 0.7MPaG), and enters the dehydration process (dehydration until the water content is lower than 0.4 ppm).

[0072] Cryogenic rectification adopts single-column rectification process to extract N 2 O. The top of the tower adopts partial condensation, and the gas phase is throttled to 0.2MPaG, and then the gas phase discharge is discharged to the waste gas treatment system. The raw material gas (10°C) after dehydration and purification is exchanged with t...

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Abstract

The invention provides an adipic acid production device tail gas treatment device and a method. The adipic acid production device tail gas treatment device comprises a preceding-stage pretreatment system, a tail gas pressurization system, a purification system, a low-temperature rectification system and a catalytic decomposition system; wherein the preceding-stage pretreatment system is connectedwith the tail gas pressurization system through a pipeline, and a gas outlet of the tail gas pressurization system is communicated with a reboiling coil at the lower end of a rectification tower in the low-temperature rectification system; the other end of the reboiling coil is communicated with a liquid separation tank, an outlet of the liquid separation tank is communicated with an inlet of thepurification system, and an outlet of the purification system is communicated with an inlet of the rectification tower through a pipeline; and a liquid N2O discharge pipeline is arranged at the bottomof the rectification tower, and an outlet at the top of the rectification tower is communicated with the catalytic decomposition system. According to the method, N2O in the adipic acid production device tail gas can be effectively recycled, the blank in adipic acid process is filled up, and the aims of maximizing economic benefits and being environmentally friendly are achieved.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a tail gas treatment device and method of an adipic acid production device. Background technique [0002] N 2 O is a kind of greenhouse gas, which has a more damaging effect on the ozone layer than chlorofluorocarbons, and its ability to cause greenhouse effects is 310 times stronger than carbon dioxide. While this gas is destroying the ozone layer, due to its stable chemical properties, the substance can persist in the atmosphere for up to 120 years. [0003] N 2 O Man-made emissions mainly include tail gas from chemical production, such as the tail gas from the production of adipic acid and nitric acid, coal combustion, and the production of nylon and other chemical products. Studies have shown that atmospheric N 2 The background concentration of O increased from 270ppb before the industrial revolution to 320ppb in 2007, and with the continuous advan...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/62B01D53/56B01D53/72B01D3/14
CPCB01D53/8631B01D53/86B01D53/62B01D53/864B01D53/002B01D3/14B01D2257/402B01D2257/504B01D2257/702Y02C20/10Y02P20/30Y02P70/10
Inventor 王振华艾晓欣徐烨琨张进治张丰扬王亦舒靳权董兵牛家豪
Owner CHINA TIANCHEN ENG
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