Oxidation reactor

Abstract

The invention discloses an oxidation reactor which comprises a self-suction stirred autoclave, a condenser and an oxygen supply device. The self-suction stirred autoclave comprises an autoclave body, an oxygen inlet chamber, a motor, a hollow shaft, a centrifugal impeller and an agitation impeller. The oxygen inlet chamber is sealed and fixed inside the top of the autoclave body. The upper end of the hollow shaft passes through the oxygen inlet chamber to be connected to the motor fixed on the autoclave body. The centrifugal impeller sleeves the middle part of the hollow shaft. The centrifugal impeller is provided with a feed opening and a discharge opening. The feed opening is communicated with the oxygen inlet chamber through the hollow shaft. The agitation impeller sleeves the lower end of the hollow shaft. The oxygen supply device is communicated with the oxygen inlet chamber inside the self-suction stirred autoclave. The top of the self-suction stirred autoclave is provided with an air outlet communicated with the condenser. A gas outlet of the condenser is communicated with the oxygen inlet chamber. According to the invention, discharge of exhaust gas is eliminated, a reaction is rapid, period is short, and conversion rate and yield of products are high.

Description

technical field [0001] The invention relates to the technical field of chemical production equipment, in particular to an oxidation reaction device. Background technique [0002] In the prior art, p-nitroacetophenone production oxidation reaction device, such as figure 1 As shown, it is mainly composed of oxidation tower 1, air distributor 2, gas-liquid separator 3 and air compressor 5, etc. After the raw material nitroethylbenzene is added to the oxidation tower 1, steam at a pressure of 0.6-0.8Mpa is introduced into the tower body spacer to heat the raw material. When the temperature rises to about 130-140°C, the air compressor 5 is turned on, Compressed air with a pressure of about 0.5-0.7Mpa. The compressed air is evenly distributed by the air distributor 2 in the tower as fine bubbles and enters the feed liquid. Because the specific gravity of the bubbles is much smaller than that of the feed liquid, the bubbles naturally float up, and because the surface of the bubb...

AI Technical Summary

Problems solved by technology

When the fine air bubbles rise to the liquid level of the raw material, other gases and unreacted oxygen in the fine bubbles are discharged to the gas-liquid separator under the pressure of the air compressor, and under the action of the separator, the gas is azeotroped under high temperature and high pressure. The raw materials and generated reactants are separated and returned to the oxidation tower 1, with the products in the reaction process and a large amount of tail gas discharged to the tail gas treatment system for treatment and then discharged to the atmosphere; this will inevitably cause air pollution and affect the surrounding environment

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