Method for treating oxygen-containing tail gas in ethylene glycol production device

A production device and treatment method technology, applied in separation methods, chemical instruments and methods, climate sustainability, etc., can solve the problems of high cost, low safety, and environmental pollution of oxygen-containing tail gas treatment

Inactive Publication Date: 2019-02-22
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the high cost of oxygen-containing tail gas treatment in the prior art, high energy consumption, low safety, and environmental pollution. It provides a new treatment method for oxygen-containing tail gas in ethylene glycol production equipment , has the advantages of good bubble stability, good fire extinguishing effect and good anti-reburning performance

Method used

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  • Method for treating oxygen-containing tail gas in ethylene glycol production device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A treatment method for oxygen-containing tail gas in an ethylene glycol production unit, such as figure 1 As shown, the oxygen-containing tail gas 15 enters the tubular reactor 2 through the gas-gas heat exchanger 3, and under the action of a noble metal catalyst such as silver or platinum, a catalytic oxidation reaction occurs on the side of the tube, so that the oxygen in the tail gas and ethylene fully react , The heat produced by the tubular reactor 2 is sent out through the steam drum 1. In addition, the reaction temperature of the catalytic oxidation is controlled by the pressure of the deheated steam drum 1. The treated tail gas 9 is cooled by the cooler 4 and enters the ethylene recovery unit 5, and the tail gas from which ethylene has been removed enters the liquid separation tank 6 for subsequent treatment.

[0026] The temperature of the oxygen-containing tail gas is 25.2°C, and the mass flow rate is 2397.72kg / hr. In terms of volume fraction, the oxygen conte...

Embodiment 2

[0029] According to the conditions and steps described in Example 1, the oxygen-containing tail gas temperature is 25.2°C, and the mass flow rate is 599.43kg / hr, wherein, in terms of volume fraction, the oxygen content is 5.1%, the ethylene content is 33.9%, the methane content is 52.8%, and the carbon dioxide content is 1.5% %, the content of argon is 6.2%, the content of nitrogen is 0.2%, and the content of water is 0.3%. Sent, in addition, the reaction temperature of catalytic oxidation process is controlled by the pressure of deheating steam drum, reaction temperature 350 ℃, reaction pressure 1.5MPa (gauge pressure), in silver catalyst (catalyst loading is 0.1998kg, the loading capacity of silver in the catalyst 3.4% (mass), the carrier is SiO 2 ) under the action of a catalytic oxidation reaction, so that the oxygen in the tail gas fully reacts with ethylene, the conversion rate of oxygen reaches 100%, and generates carbon dioxide and water, that is, the volume content of...

Embodiment 3

[0032] According to the conditions and steps described in Example 1, the oxygen-containing tail gas temperature is 25.2°C, and the mass flow rate is 2397.72kg / hr, wherein, in terms of volume fraction, the oxygen content is 3.5%, the ethylene content is 41.49%, the methane content is 46.53%, and the carbon dioxide content is 2.1% %, the content of argon is 5.8%, the content of nitrogen is 0.18%, and the content of water is 0.4%. Sent, in addition, the reaction temperature of catalytic oxidation process is controlled by the pressure of deheating steam drum, reaction temperature 350 ℃, reaction pressure 1.5MPa (gauge pressure), in silver catalyst (catalyst loading is 0.79924kg, the loading capacity of silver in the catalyst 3.4% (mass), the carrier is SiO 2 ) under the action of a catalytic oxidation reaction, so that the oxygen in the tail gas fully reacts with ethylene, the conversion rate of oxygen reaches 100%, and generates carbon dioxide and water, that is, the volume conte...

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Abstract

The invention relates to a method for treating oxygen-containing tail gas in an ethylene glycol production device. The problems that in the prior art, the oxygen-containing tail gas treating is high in cost, large in energy consumption and low in safety, and pollutes the environment are mainly solved. According to the method for treating the oxygen-containing tail gas in the ethylene glycol production device, by adopting the technical scheme that the oxygen-containing tail gas from the ethylene oxide-ethylene glycol device enters a shell and tube reactor through a gas-gas heat exchanger and generates a catalytic oxidation reaction on the tube side under the effect of a noble metal catalyst, thus oxygen in the tail gas sufficiently reacts with ethylene, and the oxygen in the tail gas is removed; and then the treated tail gas is cooled through a cooler and then enters an ethylene recovering unit, and after the ethylene is removed, the tail gas enters a liquid separating tank to be subjected to subsequent treatment, the problems are solved well, and the method can be used for treating the oxygen-containing tail gas in the ethylene glycol production device.

Description

technical field [0001] The invention relates to a treatment method for oxygen-containing tail gas in an ethylene glycol production device. Background technique [0002] Ethylene oxide (EO), also known as ethylene oxide, is a colorless gas at room temperature and is miscible with water, alcohol, and ether. The chemical properties are lively, and it is very easy to carry out ring-opening addition reaction with compounds containing active hydrogen to generate a series of derivatives. Common ethylene oxide derivatives mainly include ethylene glycol, polyethylene glycol, glycol ether, ethanolamine, etc. At present, about 70% of the world's ethylene oxide is used to produce ethylene glycol and diethylene glycol, about 11% is used to produce polyether nonionic surfactants, and about 19% is used to produce ethanolamine, ethylene glycol, etc. Alcohol ether, choline chloride and other intensive processing products. [0003] The hydration of ethylene oxide to produce ethylene glycol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72C07D301/08C07D303/04C07C29/10C07C31/20
CPCB01D53/8668C07C29/106C07D301/08C07D303/04C07C31/202Y02P20/10Y02P20/50
Inventor 张亚男张艺陈迎张翼贾微余冬明徐曼
Owner SINOPEC SHANGHAI ENG
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