Environmental-protection and energy-conversion type diaphragm electrolysis device

Abstract

The invention relates to an environmental-protection and energy-conversion type diaphragm electrolysis device. The device comprises an electrolytic bath, cathode plates and anode plates, wherein the cathode plates and the anode plates are accommodated in the electrolytic bath; the device further comprises an acid mist catching device; the acid mist catching device comprises an acid mist absorption tower, a water pump and an exhaust fan; diaphragm frame sets are arranged between the cathode plates and the anode plates; acid mist collecting holes are formed in the two sides of the upper parts of the diaphragm frame sets, and form acid mist catching channels; acid mist generated on anode is caught through the exhaust fan; tower plates are arranged in the acid mist absorption tower; and the middle between the bottom end and the upper end of one side of the acid mist absorption tower is connected with the water pump to form water circulation. The environmental protection and energy conversion type diaphragm electrolysis device has the following benefits: the diaphragm frame sets are arranged to realize overall sealing of an anode room; the acid mist on the anode is effectively collected to eliminate the pollution; meanwhile, a forced catholyte circulating device realizes forced catholyte circulation to realize the purposes of eliminating the concentration polarization and improving the cathode current efficiency so as to reduce the electric consumption; and the device realizes the outer circulating cooling of the electrolytic bath, improves the cooling efficiency, and achieves the purposes of reducing the energy consumption and decreasing the cost.

Description

technical field [0001] The invention relates to the field of electrolysis of manganese, nickel, cobalt, etc., and mainly relates to an environment-friendly and energy-saving diaphragm electrolysis device. Background technique [0002] At present, in the actual production of manganese, nickel, cobalt and other diaphragm electrolysis, the electrochemical reaction of the anode produces a large amount of gas. When these gases are precipitated on the plate, they initially adhere to the surface of the electrode. When force is exerted, the bubbles will detach from the plate and float up from the solution. During the floating process, the bubbles will collide with each other and form larger bubbles. When the bubbles reach the liquid surface, due to the effect of the surface liquid tension, the bubbles overflowing from the solution will inevitably carry liquid, and these liquid-carrying bubbles will burst when they encounter the cold air on the tank surface, forming a liquid mist. D...

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Problems solved by technology

Due to the use of an open diaphragm frame, the anode acid mist cannot be collected, resulting in serious acid mist pollution in the plant, which can only be dissipated through large-flow ventilation, which cannot completely solve the problem of acid mist pollution; while the small flow and concentrated area liquid intake method makes The manganese ions in the cathode area cannot be effectively replenished, resulting in serious concentration polarization of the cathode, and the cathode current efficiency can only reach about 70%; since each electrolyzer is equipped with a cooling water row, not only the effective space in the electrolyzer becomes smaller , which affects the increase in production capacity, and the cooling water pipeline layout is complicated, the investment cost is high, and its operating cost is high

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