Chlorine dioxide generator operating procedures

Note: The name of the generator level tube: The left water right reaction is the level tube on the left side of the device that is the device water jacket, the right is the liquid level of the equipment reaction chamber, and there are 2 sewage valves behind the equipment (the following is the reactor sewage discharge Valve; upper jacket drain valve)

(A) Check before driving

Before starting the vehicle, the chlorine dioxide generator shall be fully inspected for the ejector pressure water line, chemical material transfer line, chlorine dioxide dosing line, material feeders and valves, electrical appliances, meters, and level gauges. The inspection scope is as follows: :

1, check the chlorine dioxide generator pipeline, pressure water pipeline, raw material supply pipeline, generator host and valve, level gauge installation is in place; whether the valve switch is flexible, the level gauge indication is accurate; whether in the material feeder Sundries.

2. Inform the instrumentation engineer to check the condition of the instrument and make preparations for driving; inform the electrician to inspect the electrical equipment and transmit power. The lighting of each room and equipment should be sufficient.

3, the chlorine dioxide generator host and its pipelines are washed, rinsed and cleaned.

4. Open the power water valve, the water pressure can meet the requirements and can be stable operation (0.2MPa ~ 0.4MPa).

5. Check whether the components of the equipment are normal, whether there are any leaks, or if there are any leaks, handle them in a timely manner to ensure safe operation.

6. Check if the position of each valve switch is ready.

7, check the safety valve, plug the safety valve.

8. Fill the heated water jacket with water from the water inlet.

9. Add water to the reactor one-third of the level tube when it is used for the first time.

10. Turn on the controller switch and observe that the metering pump and temperature display are correct.

(b) boot process

1. The configuration and addition of raw materials

(1) Preparation and Addition of Sodium Chlorate: The configuration of sodium chlorate solution is to use a material feeder, and the ratio is 1:2, that is, one kilogram of sodium chlorate and two kilograms of water are fully dissolved to prepare a 33% sodium chlorate solution. .

1 The working principle of the material feeder: using the power provided by the water pump, the water is tangentially circulated in the melting tank to form the hydraulic stirring in the melting tank, and at the same time, the baffle in the melting tank is used to make the raw material. Better dissolution.

The use of 2 material feeder (after the process control chart of the materializer is attached)

Add water: Close the valves 1, 2, 3, 4, open the water inlet control valve, and then add water to the material tank to the specified scale (When the HLQ-100 type material feeder is at the specified scale, the water is 200kg, and the dissolved sodium chlorate is dissolved. For 100kg) Material: Open the valves 1, 3, open the material pump, slowly pour sodium chlorate into the material tank, stir and run for 10 to 15 minutes, stop the material pump.

Dumping: After the material process is completed, open the valves 2 and 4 and close the valves 1 and 3; open the material pump and hit the sodium chlorate solution into the sodium chlorate tank.

Note: The switch of the materializer valve must be opened first and then closed. The material control valve 1 and 3 are a group with the same valve position. The material control valve 2 and 4 are a group and the valve position is the same. During the operation of the material pump, the four valves cannot be closed. The valve position must be checked before starting the pump; the material tank must be kept clean, otherwise it will damage the material pump; when the damp solids or block sodium chlorate is formed, the material time should be prolonged; the material feeder and standard When the metering box is connected and used, be sure to pay attention to the liquid level of the metering box when it is about to be filled. When it is about to be full, the material must be stopped. Otherwise, the metering box will be damaged; the material pump is strictly prohibited to be empty, and the material tank liquid must be checked before starting the pump. The bit is enough, otherwise the material pump mechanical seal seal is damaged.

(2) Addition of hydrochloric acid: 31% of industrial hydrochloric acid is used for hydrochloric acid.

The addition of hydrochloric acid from the 12# water stabilized chlorine dioxide generator: The operation steps are: open the small water ejector power water control valve to operate the water injector, and then open the acid control valve on the metering box to make the hydrochloric acid into the metering box When the hydrochloric acid is added to the specified level of the glass tube of the metering box, the metering box and the ejector pressure water control valve are closed, and the addition of hydrochloric acid is stopped. ,

Addition of 21# water stable hydrochloric acid: Open the metering box of hydrochloric acid into the acid control valve, and use the self-pressure to self-flow the hydrochloric acid in the hydrochloric acid storage tank to the metering box. When hydrochloric acid is added to the specified level of the glass tube of the metering box, close the metering box of hydrochloric acid. Into the acid valve, stop adding hydrochloric acid.

Feeder Process Pipeline Control Chart

2. Start operation

(1) Fill the heated water jacket with water from the water inlet.

(2) Add water to the reactor one-third of the level gauge for the first time.

(3) Turn on the power of the thermostat and let the temperature rise to the set temperature (78°C).

(4) Open the power water valve and adjust the water pressure to the specified value (≥0.2MPa) to ensure the normal operation of the water injector.

(5) After the temperature display has reached the set temperature (78°C), open the valve on the raw material pipe and start the metering pump. If there is air in the metering pump pipe, the air should be exhausted first, and then the metering pump operating frequency should be adjusted so that it can reach the required flow and the equipment can operate normally.

3. Adjustment of equipment output

(1) The adjustment of the output of the equipment is mainly achieved by adjusting the size of the metering pump's feeding amount, that is, by adjusting the metering pump. The higher the metering pump frequency, the greater the equipment feeding amount, the greater the output. On the contrary, the smaller the output.

(2) Whether the output of the equipment is adjusted depends on the amount of residual chlorine in the water. If the residual chlorine in the water is higher after the equipment is operated for a period of time, the output can be adjusted downward; if the residual chlorine is not enough, the output can be increased.

(3) Metering pump flow can be achieved by adjusting the stroke and operating frequency. Adjustment of stroke: When the metering pump is running, adjust the stroke adjustment knob of the pump; the adjustment of the frequency: There is a frequency adjustment button on the device controller, which can be adjusted by “+-” when running. Under normal circumstances, the trip should be fixed and the operating frequency adjusted.

(4) The rated output of the equipment: Each equipment has its rated output, which can be adjusted within the range of 50%-100%. The upper limit of the metering pump frequency is set in the controller according to the model of the metering pump configured to ensure the good equipment. Operating parameters and raw material conversion rate. Exceeding this range affects the good operation of the device.

4. Inspection

During the operation of the equipment, it should be inspected every 1-2 hours. The inspection includes:

(1) Dynamic Water and Dosing System

Check whether the system is leaking; whether the degree of valve switching is normal; whether the pressure is normal; whether the ejector is operating and whether the color is normal.

(2) Equipment host

Check whether the device has run-and-drop phenomenon; whether the degree of switching of each valve is normal; when the safety valve is closed, especially if there is a large odor between equipments, check the safety valve immediately. If the safety valve opens, it should be reset in time to ensure that the generator is The normal reaction under vacuum condition; whether the reactor and water jacket liquid level is within the normal range; whether the equipment has abnormal noise, different response immediately stops the inspection; whether the controller and each parameter are normal, with or without alarm.

(3) Feeding system inspection

Check whether the system is leaking; whether the degree of switching of each valve is normal; whether the raw material tank is lack of material; if the filter is unobstructed, if it is blocked, it shall be promptly cleaned; if there is no gas in the inlet pipe of the metering pump, if it is, it shall be promptly discharged. Metering pump operation is normal, including sound, vibration, temperature, etc.; metering pump frequency, stroke is at the set value; back pressure valve is normal, there is no back pressure is too large or back pressure is too small to form pumping The phenomenon of suction of raw materials, if any, should be stopped for troubleshooting.

5. Shutdown

(1) Short-time shutdown

Short-term shut-down refers to operation less than 24 hours during maintenance or troubleshooting.

1 When shutting down, the metering pump power should be turned off 30-50 minutes in advance, stop feeding the metering pump, and close all valves on the chemical raw material supply line. This will make the entire system in a vacuum state and the ejector will continue to respond in the equipment. The generated chlorine dioxide gas is exhausted as much as possible to reduce the gas spill from the delayed reaction at shutdown.

2 After stopping the material for 30 to 60 minutes, when the color of chlorine dioxide at the suction port of the ejector is very light, after the residual chlorine dioxide gas in the equipment is seldom enough, the power water is turned off, the ejector stops working, and the equipment stops. run.

3 Turn off the power water valve and turn off the power and the unit shuts down.

4 Before restarting, perform a brief check before starting the machine according to the relevant contents described in 2.1.

(2) Stop the generator for a long time

The system will shut down if the equipment does not operate for more than 24 hours, such as during a season of maintenance.

1 Press briefly to stop the program.

2 Piping flushing: Disassemble the PE hose on the sodium chlorate supply line, dip the tubing into a clean, gentle water tank, and use water as a feedstock to run the generator for at least four minutes.

3 Hydrochloric acid flush the line with the 2 operation.

4 Open the reaction chamber drain valve at the bottom of the generator and drain the reaction liquid in the reaction chamber. Add a little alkaline solution to neutralize it and discharge it together into the trench or sewage pipeline.

5 Turn on the heated water jacket drain valve at the bottom of the generator to drain the hot water from the water jacket. Be careful not to splash on the body or skin during discharge to prevent burns due to high water temperatures.

6 Open the guide shower in the power water line, drain the water and drain it.