Concentration-rectification optimized production system for concentrating 27.5% hydrogen peroxide dilute solution into 50% hydrogen peroxide thick solution and method thereof

Abstract

The invention discloses a concentration-rectification optimized production system for concentrating 27.5% hydrogen peroxide dilute solution into 50% hydrogen peroxide thick solution and a method thereof. The concentration-rectification optimized production system comprises jars of 27.5% hydrogen peroxide dilute solution pumped with a hydrogen peroxide dilute concentrating stabilizer, 50% hydrogen peroxide product pumped with a hydrogen peroxide stabilizer and chemical-grade product pumped with the hydrogen peroxide stabilizer, wherein outputs of the jars are all conveyed to the pipeline of an evaporator for application according to the invention; gas out of the top of a rectifying tower is mixed with gas pumped out of the shell of the evaporator and then the mixed gas passes through a tail gas condenser; after being cooled, the mixed gas enters a vacuum pump package via a gas-liquid mixed separation tank; and a desalted water acidity adjusting device and a pH meter online monitoring device are additionally arranged in the process of conveying desalted water to a reflux liquid tank from a desalted water station; therefore, controllable production safety of the system is guaranteed. According to the invention, the requirement of the system for the water quality of the desalted water in the production process and in emergency is met; and the system has the advantages of high product yield, low device investment, stable guarantee of product quality, low energy consumption and low product storage risk.

Description

technical field [0001] The patent of the present invention relates to the fields of coal chemical industry and fine chemical industry, in particular to a concentrated rectification optimized production system and its method for condensing 27.5% dilute hydrogen peroxide solution into 50% concentrated hydrogen peroxide solution. Background technique [0002] With the rapid development of our country's national economy and the general trend of "production globalization, collectivization, centralization, and green products" in today's world industrial development, hydrogen peroxide, as a leader in green products, is favored by users. Rapid development and strong demand. At the same time, the demand for hydrogen peroxide as a basic chemical raw material is increasing day by day in the domestic market, and the export volume is also increasing year by year. Textiles, chemical synthesis, pulp and paper are the three traditional consumption areas of hydrogen peroxide. As a major...

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Problems solved by technology

The fluctuation of vacuum degree will cause unstable production, which will bring certain difficulties to operation and safe production. At the same time, it will cause the concentration and quality of the produced products to be unqualified. In the production process of finished tanks, according to the existing process trend, the technical grade products directly enter the finished tanks after exchanging heat with the dilute hydrogen peroxide solution, and the chemical grade products are directly sent to the finished tanks by the pump, while the evaporator, rectifying The outlet temperature of the tower is as high as 65°C, which is much higher than the hydrogen peroxide storage temperature requirement of less than 30°C (general empirical data shows that when the temperature of liquid hydrogen peroxide rises by 10°C, its decomposition rate increases by 2.2±0.1 times), which increases the The unsafe storage of hydrogen peroxide is prone to safety accidents. For the addition of 50% hydrogen peroxide stabilizer, a stabilizer tank is installed in the finished product tank area and pumped into the hydrogen peroxide solution in the finished product tank, and then stirred evenly with air ; Increased air, equipment investment, power consumption and unsafe

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