Tubular plug flow type sodium hypochlorite generator

A sodium hypochlorite, plug-flow technology, applied in the field of tubular plug-flow sodium hypochlorite generators, can solve the problems of uneven electrolyte distribution, high equipment purchase costs, and low electrolysis efficiency, and achieve simple structure, low equipment cost, and electrolysis efficiency high effect

Pending Publication Date: 2021-02-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, sodium hypochlorite generators mostly use plate-shaped electrodes, and parallel electrode plates are set in the electrolytic cell to generate electrolytic reactions. The electr

Method used

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  • Tubular plug flow type sodium hypochlorite generator

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Effect test

Embodiment 1

[0030] The salt water with a concentration of 8 g / L is processed by the system of the present invention. The system is placed vertically, the effective length of the tubular electrode is 1.0 m, and the gap between the tubular cathode and the tubular anode is 4.5 mm. The operating conditions are as follows: the current density is 200 A / m 2 , the inflow flow rate is 6.4 L / h. The operation results are as follows: the current efficiency of the sodium hypochlorite generator is about 76%, the power consumption is about 4.7 kWh / kg available chlorine, the salt consumption is about 3.2 kg sodium chloride / kg available chlorine, and the concentration of available chlorine in the effluent is 2.5 g / L.

Embodiment 2

[0032] The salt water with a concentration of 15 g / L is processed by the system of the present invention. The system is placed horizontally, the effective length of the tubular electrode is 1.0 m, and the gap between the tubular cathode and tubular anode is 4.5 mm. The operating conditions are as follows: the current density is 200A / m 2 , the inflow flow rate is 4 L / h. The operation results are as follows: the current efficiency of the sodium hypochlorite generator is about 82%, the power consumption is about 5 kWh / kg available chlorine, the salt consumption is about 3.5 kg sodium chloride / kg available chlorine, and the concentration of available chlorine in the effluent is 2.3 g / L.

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Abstract

The invention discloses a tubular plug flow type sodium hypochlorite generator. A tubular anode is coaxially located on the inner side of the tubular cathode, and the upper end and the lower end of atubular cathode are fixedly connected with a water outlet end sealing piece and a water inlet end sealing piece respectively. A metal conductive connecting piece is nested between the water inlet endsealing piece and the lower end surface of the tubular anode, and is fixedly connected with the water outlet end and the water inlet end sealing piece through the tubular cathode; connecting ends arearranged on the outer sides of the metal conductive connecting piece and the tubular cathode, and are respectively connected with positive and negative electrodes of a direct-current power supply; andthe annular columnar cavity is provided with a water inlet at the lower end and a water outlet at the upper end. The tubular electrolysis electrode is adopted, the structure of the generator is improved, the small holes formed in the upper portion and the lower portion of the generator are beneficial to uniform distribution of electrolyte between the electrolysis anode and the electrolysis cathode, the fluid flow state is a plug flow type, the electrolysis efficiency is high, and salt consumption and power consumption are low; the generator is simple in structure, a reactor shell is not independently arranged, a heat dissipation device is not arranged, and equipment cost is low; the method is suitable for the disinfection link of the rural small-sized water treatment station.

Description

technical field [0001] The invention relates to a sodium hypochlorite generator, in particular to a tubular plug-flow sodium hypochlorite generator suitable for disinfection projects of small rural water treatment stations. Background technique [0002] Rural drinking water treatment plants generally have imperfect disinfection equipment and non-standard disinfection processes, which seriously threaten the lives and health of farmers. Choosing a suitable disinfection method and constructing a suitable drinking water disinfection equipment are an indispensable part of building a rural drinking water plant. Sodium hypochlorite disinfection has low cost, easy-to-obtain raw materials, simple operation and high safety, and is widely used in the disinfection process of rural and urban drinking water treatment. [0003] Sodium hypochlorite solution can be prepared on site by electrolyzing salt water with a sodium hypochlorite generator, which has the advantages of simple material ...

Claims

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Application Information

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IPC IPC(8): C25B1/26C25B9/17C25B9/01C02F1/50C02F1/76
CPCC25B1/265C02F1/50C02F1/76
Inventor 陈雪明李爽张黎
Owner ZHEJIANG UNIV
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