Environmental-protection and energy-conversion type diaphragm electrolysis device

A diaphragm electrolysis and energy-saving technology, applied in the field of electrolysis, can solve the problems of high investment cost, affecting production capacity increase, high operating cost, etc., and achieve the effect of eliminating environmental pollution, reducing operating cost, and improving current efficiency

Active Publication Date: 2014-09-10
HANGZHOU SANAL ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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, resu

Method used

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  • Environmental-protection and energy-conversion type diaphragm electrolysis device
  • Environmental-protection and energy-conversion type diaphragm electrolysis device
  • Environmental-protection and energy-conversion type diaphragm electrolysis device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Embodiment 1, take electrolytic manganese as an example

[0020] The manganese sulfate solution is adjusted to pH 6.0-7.5, and the temperature is controlled at 38-42° C. The manganese sulfate solution flows into the electrolytic cell 1 from the high-level flow tank. After the manganese sulfate solution is filled with the electrolytic cell, the circulating pump 54 of the catholyte is turned on, The catholyte is self-circulated in the electrolytic cell and a forced flow is formed on the surface of each cathode. When the catholyte circulating flow reaches 1500m 3 / Mt, increasing the cathode current density to 350A / m 2 , after 1 day of electrolysis, the cathode product was taken out, and its cathode current efficiency reached 85%.

Example Embodiment

[0021] Embodiment 2 takes electrolytic manganese as an example

[0022] The manganese sulfate solution is adjusted to pH 6.0-7.5, and the temperature is controlled at 38-42° C. The manganese sulfate solution flows into the electrolytic cell 1 from the high-level flow tank. After the manganese sulfate solution is filled with the electrolytic cell, the circulating pump 54 of the catholyte is turned on, The catholyte is self-circulated in the electrolytic cell and a forced flow is formed on the surface of each cathode. When the catholyte circulating flow reaches 1000m 3 / Mt, increasing the cathode current density to 350A / m 2 , After 1 day of electrolysis, the cathode product was taken out, and its cathode current efficiency reached 82%.

Example Embodiment

[0023] Embodiment 3 takes electrolytic manganese as an example

[0024] The manganese sulfate solution is adjusted to pH 6.0-7.5, and the temperature is controlled at 38-42° C. The manganese sulfate solution flows into the electrolytic cell 1 from the high-level flow tank. After the manganese sulfate solution is filled with the electrolytic cell, the circulating pump 54 of the catholyte is turned on, The catholyte is self-circulated in the electrolytic cell and a forced flow is formed on the surface of each cathode. When the catholyte circulating flow reaches 800m 3 / Mt, increasing the cathode current density to 350A / m 2 , after 1 day of electrolysis, the cathode product was taken out, and its cathode current efficiency reached 80%.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C25C1/00C25C7/00C25C7/04
Inventor 林建平林建灶柳彦石文堂
Owner HANGZHOU SANAL ENVIRONMENTAL TECH
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