Electrolytic sodium hypochlorite generator

1Fully automatic sodium hypochlorite generatorOverview of

1. The sodium hypochlorite generator is developed by our company through years of exploration, innovation, and practice based on in-depth research on similar product technologies at home and abroad, using new processes and special high-quality materials. The product adopts a diaphragm free electrolysis process, and the anode is coated with titanium based nanocrystalline DSA. It has low chlorine evolution potential, high current efficiency, excellent corrosion resistance, long electrode service life, electrode shape can be designed according to user needs, electrode substrate can be reused multiple times, does not pollute the medium, and can withstand higher current density. Electrolytic cell design, reasonable.

Professional production of stabilized voltage power supply, with an electrical conversion efficiency of over 92%, low heat generation, and stable operation. The power supply itself has input overvoltage/undervoltage protection, output overvoltage/overcurrent/short circuit protection, overheating protection, etc., ensuring high reliability and safety performance of the power supply operation. The product has fully automatic continuous operation, automatic salt dissolution, automatic ratio of dilute salt water, high and low liquid level control of the storage tank, and can achieve fully automatic intelligent unmanned operation.

2. Composition and representative significance of specifications and models

The generator specifications are divided according to the effective chlorine production per hour [g/h] of the equipment,

II. Structural Features and Working Principles

（1） Equipment appearance diagram

Description of each component of the equipment:

The raw salt in the salt dissolving tank is dissolved here to form saturated saltwater

The dilute salt water tank is filled with saturated salt water and water in an equal proportion, which automatically dilutes to 3-5%

Diluted saltwater

Electrode anode connected to high-frequency switch power supply positive pole (+)

Electrode cathode connected to negative pole of high-frequency switching power supply (-)

Sodium hypochlorite storage tank is used to store sodium chlorate solution and provide high and low liquid level control signals

Quantitative addition of sodium hypochlorite solution by metering pump

The injection valve is installed on the dosing pipeline

The main inlet valve controls the total inlet of the equipment.

Water inlet manual valve, manual control equipment for water inlet

The hydrogen gas generated during the electrolysis process is discharged from the hydrogen outlet

Discharge hypochlorous acid from the sodium hypochlorite storage tank when the equipment is not in use for a long time at the sewage outlet

Sodium solution

The inlet regulating valve adjusts the inlet water volume of the salt dissolving tank

Dilution water flowmeter measures and adjusts the flow rate of dilution water

Dissolved salt water flowmeter measures and adjusts the flow rate of dissolved salt water

Cooling water flowmeter measures and adjusts the flow rate of cooling water

Cooling water pipe cools down the electrode tube

Remove hypochlorous acid from the sodium hypochlorite storage tank when the sewage valve is not in use for a long time

Sodium solution

Control box controls the start and stop of various components of the equipment

（2） Overall structure: The equipment consists of a salt water tank, an electrolytic electrode assembly, a rectifier power supply, a sodium hypochlorite storage device, a dosing device, and other parts.

Working principle: Raw salt that meets the first level standard for refined industrial salt in "Industrial Salt GB5462" is prepared into saturated salt water in a salt dissolution tank, and mixed with tap water (or softened water) in a certain proportion into a dilute salt water tank to prepare 3-5% dilute salt water. The dilute salt water flows into the electrolytic cell for electrolysis to produce 8-10% sodium hypochlorite solution, which is stored in the sodium hypochlorite storage tank and then quantitatively transported to the disinfected water body through a metering pump.

Figure 1 Equipment Installation Diagram

III. Equipment Installation

（1） Installation conditions

1. The equipment should be installed indoors, avoiding direct sunlight, and the working environment of the equipment should be between 5 ℃ and 40 ℃.

2. The equipment room floor should be paved with cement (preferably with tiles) and equipped with a flushing water source and drainage system.

3. The pressure of disinfectant injection point should not exceed 0.6MPa.

4. There should be necessary lighting facilities and a 220V, 10A power switch between the devices.

（2） Installation program and precautions

1. Equipment installation

(1) Equipment positioning: Place the equipment host and high-frequency switch power supply in the equipment room, taking into account site conditions such as the direction of tap water access and the direction of disinfectant delivery, and minimizing unnecessary bends as much as possible. The equipment should be placed in a room with good lighting and ventilation, and arranged on a horizontal floor. There should be a maintenance distance of no less than 0.8 meters from the wall around the electrolysis device. Drainage ditches or floor drains should be installed around the equipment.

(2) Install according to the equipment installation diagram. The specific method is as follows: connect the anode of the electrode to the positive pole of the high-frequency switch power supply, connect the cathode of the electrode to the negative pole of the high-frequency switch power supply, connect the metering pump, sodium hypochlorite high and low liquid levels to the corresponding positions of the control box, and connect the power supply and high-frequency switch power supply control lines to the corresponding positions of the control box.

(3) Connect the tap water source to the main inlet valve of the equipment.

(4) Connect the injection valve at the end of the metering pump to the dosing point.

(5) The hydrogen exhaust port is connected to the outside.

(6) The residual chlorine box and probe are installed on the wall, and the return water is connected to the inlet under the probe. The outlet of the probe is connected to the drainage ditch (channel) (when using a residual chlorine detector).

(7) The material of the inlet pipeline is UPVC. Please use UPVC fittings and UPVC adhesive to connect during the connection process.

2. Line installation (refer to Figure 1 and control board markings inside the control box)

(1) Connect the high and low levels of sodium hypochlorite, control box power supply, high-frequency switch power supply control line, and metering pump control line to the wiring terminal positions inside the control box;

(2) This machine adopts the internal anode and external anode connection method. The black tube in the middle of the electrolytic cell is connected to the positive pole (+) of the control cabinet as the anode, and the silver white tube around the electrolytic cell is connected to the negative pole (-) of the control cabinet as the cathode. Confirm the positive and negative poles and strictly prohibit reverse connection!

(3) The residual chlorine box power supply and control signal line are connected to the wiring terminal position of the control cabinet (when using a residual chlorine detector).

4Sodium hypochlorite generatorUsage and operating procedures

（1） Raw material specification requirements

1. Raw salt should use raw salt that meets the first level standard for refined industrial salt in "Industrial Salt GB5462", and the use of crude salt is strictly prohibited.

2. If the local water quality has a high hardness, it is recommended to choose a water softener to pre soften the dissolved salt water source, in order to reduce electrode scaling and extend the service life of the electrode.

3. If the use of raw materials that do not meet the above national standards by the user results in a decrease in the service life of the equipment electrodes or water pollution accidents, the responsibility shall be borne by the user.

（2） Usage and operation

Fill the salt dissolution tank with salt and require the use of first grade refined industrial salt;

Check the status of each valve: a. Close the bottom vent valve, b、 Open the tap water inlet valve and cooling water valve, and check whether there is any leakage in the pipelines of each unit;

Adjust the dilution water flow meter and dissolved salt water flow meter to the requirements in Table 1;

• （3） Attention:

• During the installation and use of the generator, it is strictly prohibited to impact or knock it. Pay attention to protecting the anode coating and avoid damaging it.

• Before operating this equipment, the sealing of each connecting pipe and the opening and closing status of each valve should be checked. Special attention should be paid to whether the connecting pipe of the hydrogen discharge port at the back is unobstructed and connected to the outside. It is strictly prohibited to discharge directly in the equipment room.

• During installation and use, attention should be paid to the wiring between the anode and cathode of the electrode tube and the anode and cathode of the high-frequency switching power supply. Incorrect wiring is not allowed, otherwise it will seriously affect the service life of the electrode tube.

• It is strictly prohibited to start the DC power supply when the cooling water is cut off, and it is strictly prohibited to evacuate the salt solution tank while the DC power supply is supplying electricity for electrolysis.

• Regularly check the copper busbar and direct wire input connector of the electrolytic cell to ensure good contact. If there is corrosion, remove the copper green and replace it directly. Otherwise, poor conductivity may cause problems in the electrolytic cell.