Electronic-grade sulfuric acid production system and production process

Abstract

The invention discloses an electronic-grade sulfuric acid production system which comprises an ultrasonic atomizer, an evaporation tank, a condensation tank, a liquid storage tank and a heat sink; and a fixing frame and a conical surface heater are mounted in the evaporation tank from top to bottom, a shaft rod is rotatably inserted into the fixing frame, and the upper end of the shaft rod extends to the position above the fixing frame and is provided with airflow fan blades. The invention also discloses an electronic-grade sulfuric acid production process. The production process comprises the following steps: washing the environment; performing ultrasonic atomization; performing high-temperature evaporation; performing high-pressure condensation; and accumulating and storing. The circulation of evaporation and condensation is realized through a backflow pipe, so that the system can perform repeated purification; liquid concentrated sulfuric acid is atomized through the ultrasonic atomizer to increase the evaporation speed; sulfate powder left after evaporation is scraped off through a descaling device, sulfate impurities contained in the sulfuric acid are removed, and the heat efficiency of a cambered surface heater can also be kept; and the energy consumption of the system is reduced through a spiral condensing pipe and a spiral preheating pipe.

Description

technical field [0001] The invention relates to the technical field of industrial electronic chemicals, in particular to an electronic-grade sulfuric acid production system and a production process. Background technique [0002] Electronic-grade sulfuric acid is a commonly used raw material for corrosion cleaning in the production process of circuit boards. Electronic-grade sulfuric acid is usually obtained by repeated distillation and removal of impurities from standard industrial concentrated sulfuric acid (concentration: 98%). Because standard industrial concentrated sulfuric acid contains more metal sulfuric acid Salt, direct use will affect the quality of the circuit board, so it needs to be removed. [0003] The existing electronic-grade sulfuric acid production process is generally a multiple distillation method, and the production system used is also unique to this production process, that is, it is obtained by repeated distillation and filtration of industrial conce...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantages in the prior art that the purified and filtered impurities are easy to block a certain link of the system, resulting in low production efficiency, and the need for disassembly and cleaning is not convenient enough, and a kind of electronic grade sulfuric acid production system and production system are proposed. craft

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