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Control device for oxygen content in exhaust gas of oxygen-containing liquid-phase material and control method for oxygen content in exhaust gas of oxygen-containing liquid-phase material

A control device and oxygen content technology, applied in the direction of non-electric variable control, multi-fluid ratio control, ratio control, etc., can solve the problem of exhaust gas explosion and other problems, and achieve the effect of easy operation

Pending Publication Date: 2019-07-05
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the risk that the reaction product of the direct epoxidation reaction of 3-chloropropene and hydrogen peroxide is prone to explosion, and to provide a control device for the oxygen content in the liquid-phase material exhaust gas As well as a method for controlling the oxygen content in the exhaust gas of the oxygen-containing liquid phase material, the effective control of the oxygen content in the exhaust gas of the oxygen-containing liquid phase material is realized by using the device and method provided by the present invention

Method used

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  • Control device for oxygen content in exhaust gas of oxygen-containing liquid-phase material and control method for oxygen content in exhaust gas of oxygen-containing liquid-phase material
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Embodiment 1

[0067] During the epoxidation reaction, first fill the epoxidation reaction system and the oxygen content control device with nitrogen, and control the pressure of the gas-liquid separation tank at 0.5MPa, and then manually control the feed flow of nitrogen at 0.330 kg / hour (20SLM is equivalent to 1.5 kg / hour), then open the epoxidation reaction feed and carry out the epoxidation reaction, after the epoxidation reaction product flows out from the fixed bed reactor outlet, after being cooled to 20 ℃ through the heat exchanger, it is mixed with nitrogen gas The nitrogen gas in the feed line is mixed and directly enters the middle part of the gas-liquid separation tank to be separated into an upward-flowing non-condensable gas and a downward-flowing liquid. The flow meter and oxygen analyzer installed on the tail gas pipeline measure the flow rate and oxygen content respectively, and the liquid is discharged into the storage tank of the liquid epoxidation product through the liqui...

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Abstract

The invention belongs to the field of chemical safety and relates to a control device for oxygen content in the exhaust gas of an oxygen-containing liquid-phase material and a control method for oxygen content in the exhaust gas of an oxygen-containing liquid-phase material. The device comprises an inert gas supply unit (1), a gas-liquid mixing unit (2), a gas-liquid separation unit (3), and a tail gas pipeline (4) for exhausting a non-condensable gas obtained in the gas-liquid separation unit; the inert gas supply unit is provided with an inert gas flow control system (11); and the tail gas pipeline is provided with an oxygen content analysis system (41). The method includes the following steps that: an oxygen-containing liquid-phase material is mixed with an inert gas, so that a gas-liquid mixture flow is obtained; gas and liquid separation is performed on the gas-liquid mixture flow, so that a non-condensable gas and a liquid are obtained; and the oxygen content of the non-condensable gas is detected, and the supply amount of the inert gas in the step (1) is adjusted, so that the oxygen content is not higher than 9.5% by volume. With the control device and control method of theinvention adopted, the control of the oxygen content in the exhaust gas of a reaction product can be realized, so that the oxygen content is always below the lower limit of the explosive limit of a mixed gas.

Description

technical field [0001] The invention relates to the field of chemical safety, in particular to a device for controlling the oxygen content in the exhaust gas of oxygen-containing liquid phase materials, and a method for controlling the oxygen content in the exhaust gas of oxygen-containing liquid phase materials. Background technique [0002] Epichlorohydrin is an important basic organic chemical raw material and intermediate, widely used in the synthesis of epoxy resin, glycerin, chlorohydrin rubber, pharmaceuticals, pesticides, surfactants, plasticizers and other products. [0003] An existing green production technology of epichlorohydrin under development is to prepare epichlorohydrin by epoxidation reaction with 3-chloropropene and hydrogen peroxide as reaction raw materials and methanol as solvent in the presence of titanium silicon molecular sieves. propane. In the process of preparing epichlorohydrin, a certain amount of oxygen will be produced due to the limitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D11/13
CPCG05D11/132
Inventor 张永强王新龙金欣汤文红杜泽学刘易陈康庄陈艳凤王皓范瑛琦
Owner CHINA PETROLEUM & CHEM CORP
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