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

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...

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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

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