CN1207445C

CN1207445C - Powder salt electrolytic chlorine gas generator

Info

Publication number: CN1207445C
Application number: CN 01131744
Authority: CN
Inventors: 金鹏康; 袁宏林; 王晓昌
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2001-10-12
Filing date: 2001-10-12
Publication date: 2005-06-22
Anticipated expiration: 2021-10-12
Also published as: CN1354282A

Abstract

The present invention discloses a generator for electrolyzing powdery salt to chlorine gas, which is mainly composed of a main body device, a cathode chamber, an anode chamber, a gas collection device and a direct-current power supply, wherein a negative plate, a sodium hydroxide discharge pipe and a water supply pipe are arranged in the cathode chamber (2), and an anode plate, a salt dissolving bin, a diffusion pipe, etc. are arranged in the anode chamber (3). The generator has the advantages of reasonable design, compact structure, little volume, high safety and high reliability. The generator using the powdery salt in China can greatly low the cost of raw materials, and has the advantages of low cost and low operation cost. Thereby, the generator is suitable for terminal processing in small-size and medium-size water treatment plants and sewage treatment plants and sterilization in public places.

Description

Powder salt electrolytic chlorine gas generator

The technical field is as follows: the invention relates to a sterilizing device for water supply and wastewater treatment and sterilization of public places such as families, hospitals, swimming pools and the like, in particular to an electrolytic chlorine generating device.

Background art: chlorine has strong sterilization and disinfection capability, has durability in water and can maintain a certain residual chlorine amount, thereby being widely applied to the aspect of water disinfection. At present, liquid chlorine is mainly used for disinfection, and is added into water through a liquid chlorine adding machine. However, for small and medium water plants, households, swimming pools and other public places, the use of liquid chlorine is limited due to the safety factors such as heavy volume, feeding mode and the like, and in addition, the replacement of the liquid chlorine is inconvenient. Therefore, chlorine generators for generating chlorine by electrolyzing sodium chloride occupy a certain proportion of the market, but are imported abroad (mainly in the United states), and the equipment investment is large, and the sodium chloride required by chlorine electrolysis is specially made, is spherical (the diameter is about 20mm), needs to be imported and is expensive. The domestic sodium chloride is generally powder, can be hardened and solidified due to water in a vessel when directly poured into the electrolytic chlorine generator, and forms a closed layer with aqueous solution, so that chlorine generated by electrolysis cannot be diffused and collected. In recent years, applicants successfully research a chlorine generator for electrolyzing chlorine by using domestic powder salt, and overcome the difficult problem that domestic powder salt is easy to harden and solidify in aqueous solution.

The invention content is as follows: the invention aims to provide a chlorine generator which has simple structure, small volume, safety and convenience and is suitable for terminal treatment of small and medium-sized water treatment plants and sewage treatment plants and disinfection and sterilization of public places.

The technical solution of the invention is realized as follows:

the invention mainly comprises a sealing cover (1), a cathode chamber (2), an anode chamber (3) and a direct current power supply (16); a cathode plate (4) is arranged in the cathode chamber (2), and a sodium hydroxide discharge pipe (9) and a replenishing water pipe (12) are arranged above the cathode plate (4); an anode plate (5) is arranged in the anode chamber (3), and is provided with a dissolved salt bin (7) and a diffusion tube (8), the bottom of the dissolved salt bin (7) is connected with the diffusion tube (8), the wall of the diffusion tube (8) is provided with fine holes, and the bottom of the dissolved salt bin is provided with a bracket (13); the cathode chamber (2) is separated from the anode chamber (3) by a partition plate (11), and the bottom of the partition plate (11) is a perforated plate; an air collection chamber (6) is arranged above the anode plate (5) in the anode chamber (3), a chlorine discharge pipe (10) is arranged at the top of the air collection chamber (6), and the gas discharge pipe (10) is connected with the outside through a Venturi pipe (14). The cathode plate (4) and the anode plate (5) are connected with a direct current power supply (16). The sealing cover (1) is provided with a feed inlet (17).

A sodium hydroxide discharge pipe (9) and a replenishing water pipe (12) in the cathode chamber (2) are connected with a water level controller (15) and are automatically controlled by the water level controller (15). When the water level is reduced to a certain degree, the water replenishing pipe (12) can automatically replenish clean water through the water level controller (15).

The inner diameter of the diffusion pipe (8) is 8-12 mm, the diameter of the hole on the wall surface is 1-2 mm, and the bottom of the diffusion pipe is closed.

According to the invention, an aqueous solution is filled between the cathode chamber (2) and the anode chamber (3) and is communicated with each other through a perforated plate at the bottom of the partition plate (11); a dissolved salt bin (7) in the anode chamber (3) is isolated from the aqueous solution in the anode chamber, powder sodium chloride is filled in the dissolved salt bin, and the powder sodium chloride enters the diffusion tube through the bottom of the dissolved salt bin under the action of gravity; the powder salt is dissolved and diffused into the water in the anode chamber through the small holes on the wall of the diffusion tube (8).

Chlorine generated by electrolysis is enriched near the anode plate and is continuously discharged under the condition of negative pressure through the gas collection chamber (6) and the Venturi tube (14). The sealing cover (1) plays a role in preventing the leakage of the electrolytic chlorine gas in the electrolytic process. The production of electrolytic chlorine can be achieved by adjusting the output current of the direct current power supply (16).

The invention principle of the electrolytic chlorine generator is as follows:

anode:

cathode:

the invention has the following beneficial effects:

1. reasonable in design, compact structure, the device is small. Because of using the domestic powder salt, the cost of the raw material is greatly reduced, and the method has the advantages of low manufacturing cost and low operating cost.

2. The salt dissolving bin in the anode chamber can prevent the powder salt from hardening and solidifying due to contact with the aqueous solution, and the sodium chloride in the salt dissolving bin is always kept dry.

3. Sodium chloride in the salt dissolving bin enters a diffusion tube connected with the bottom of the salt dissolving bin under the action of gravity, the sodium chloride is dissolved in the aqueous solution in the anode chamber through holes in the tube wall of the diffusion tube, and the content of the sodium chloride in the anode chamber is continuously supplemented, so that the sodium chloride solution in the anode chamber is in a saturated state.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a diffuser structure according to the present invention.

The specific implementation mode is as follows:

refer to fig. 1 and 2. The invention mainly comprises the following four parts:

1. a main body device: the shape is a cube, the top of the cube is a sealing cover 1, and the inside of the device is composed of a cathode chamber 2 and an anode chamber 3. The cathode chamber 2 and the anode chamber 3 are separated by a partition plate 11, and a perforated plate is arranged at the lower part of the partition plate 11.

2. A cathode chamber: the inner wall of the cathode chamber 2 is provided with a cathode plate 4, a sodium hydroxide discharge pipe 9 and a replenishing water pipe 12 are arranged above the cathode plate, and the sodium hydroxide discharge pipe 9 penetrates through the wall surface of the cathode chamber to be connected with an external sodium hydroxide absorption tank. The concentration of the by-product sodium hydroxide generated in the electrolysis process is continuously increased in the cathode chamber, the specific gravity of the water solution in the cathode chamber is increased, and the control valve of the water level controller is continuously lifted, so that the sodium hydroxide is periodically discharged out of the electrolyzer through the sodium hydroxide discharge pipe 9, and the process is realized through the water level controller 15 on the sodium hydroxide discharge pipe. When the water level drops to a certain degree, the make-up water pipe 12 passing through the wall of the cathode chamber is automatically made up with fresh water by the water level controller 15. The water level controller 15 may be implemented using a gravity ball float or other ball float valve.

3. Anode chamber and gas-collecting device: the anode chamber 3 is provided with a dissolved salt bin 7, a diffusion tube 8 and an anode plate 5. The bottom of the salt dissolving bin 7 is connected with a diffusion tube 8, and the wall surface of the diffusion tube 8 is provided with fine holes; the inner diameter of the diffusion tube 8 is generally selected to be 8-12 mm, the diameter of the hole on the wall surface is 1-2 mm, and the bottom of the diffusion tube is closed. The bottom of the salt dissolving bin is provided with a bracket 13 which is fixedly arranged with the bottom or the wall surface of the anode chamber 3. A gascollection chamber 6 is arranged on the top of the partition plate 11 and above the anode plate 5, a chlorine gas discharge pipe 10 is arranged on the top of the gas collection chamber 6, and the chlorine gas discharge pipe 10 is connected with the outside through a Venturi pipe 14.

4. Power supply: the power supply 16 connecting the cathode plate 4 and the anode plate 5 is a low voltage dc power supply. The production of electrolytic chlorine can be achieved by adjusting the output current of the dc power supply 16.

The working process of the invention is as follows:

1. according to the electrolysis principle, before electrolyzing sodium chloride, a certain amount of clean water (or tap water) is injected into the cathode chamber 2 and the anode chamber 3 through the supplementary water pipe 12 to submerge the two electrode plates.

2. Applying direct current on the two polar plates 4 and 5, under the action of the direct current, the cathode and anode chambers 2 and 3 move the chloride ions to the anode plate 5, and chlorine generated by electrolysis is collected by a gas collecting device 6 above the anode plate and is discharged out of the device by a discharge pipe 10; the sodium ions move to the cathode plate 4, and the by-product sodium hydroxide is generated by electrolysis and is discharged out of the device through a sodium hydroxide discharge pipe 9.

3. As the electrolysis consumes the sodium chloride in the water, the concentration of the sodium chloride is lower than that of the saturated sodium chloride, and the sodium chloride in the diffusion tube 8 is dissolved and diffused into the water to supplement the sodium chloride.

4. After the sodium chloride in the diffusion pipe is reduced, the sodium chloride in the salt dissolving bin 7 can be continuously supplemented under theaction of gravity. Sodium chloride is added into the salt dissolving bin 7 from a feed inlet 17.

5. After the concentration of sodium hydroxide in the cathode chamber 2 exceeds a certain content, the sodium hydroxide is discharged from the sodium hydroxide discharge pipe 9 under the action of the ball float valve, and when the water level drops to a certain position, the lost water can be timely supplemented through the supplementing water pipe 12 under the action of the ball float valve.

6. The production of electrolytic chlorine can be achieved by adjusting the current of the direct current power supply.

Claims

1. A powder salt electrolytic chlorine generator is characterized in that: the device mainly comprises a sealing cover (1), a cathode chamber (2), an anode chamber (3) and a direct current power supply (16); a cathode plate (4) is arranged in the cathode chamber (2), and a sodium hydroxide discharge pipe (9) and a replenishing water pipe (12) are arranged above the cathode plate (4); an anode plate (5) is arranged in the anode chamber (3), and is provided with a dissolved salt bin (7) and a diffusion tube (8), the bottom of the dissolved salt bin (7) is connected with the diffusion tube (8), the wall of the diffusion tube (8) is provided with fine holes, and the bottom of the dissolved salt bin is provided with a bracket (13); the cathode chamber (2) is separated from the anode chamber (3) by a partition plate (11), and the bottom of the partition plate (11) is a perforated plate; a gas collection chamber (6) is arranged above the anode plate (5) in the anode chamber (3), the top of the gas collection chamber (6) is provided with a chlorine gas discharge pipe (10), and the cathode plate (4) and the anode plate (5) are connected with a direct current power supply (16); the sealing cover (1) is provided with a feed inlet (17).

2. The electrolytic chlorine generator as claimed in claim 1, wherein: a sodium hydroxide discharge pipe (9) and a replenishing water pipe (12) in the cathode chamber (2) are connected with a water level controller (15) and are automatically controlled by the water level controller (15).

3. The electrolytic chlorine generator as claimed in claim 1, wherein: the chlorine gas discharge pipe (10) is connected with the outside through a Venturi pipe (14).

4. The electrolytic chlorine generator as claimed in claim 1, wherein: the inner diameter of the diffusion pipe (8) is 8-12 mm, the diameter of the hole on the wall surface is 1-2 mm, and the bottom of the diffusion pipe is closed.