With the advent of environmentally friendly high pressure, the importance of water treatment projects in the chemical industry is becoming increasingly prominent. Today we bring you dry goods full of water treatment technology.
Thick/thin grille
1. Operating procedures
1. The operator should be familiar with the structure and working principle of the thick/thin grille.
2. Ensure that the motor power line is connected correctly and the supply voltage is normal.
3. The opening and stopping method of the thick grille in the factory area is: dial the "manual" gear, press the "open/stop" button to open, press the "on/stop" button to turn off, observe the display of the indicator light during operation; dial the "remote control" gear, and the central control room controls the start and stop.
The opening and stopping method of the thick grille of the lifting pump station and the fine grille of the factory area is: dial the "manual" gear, turn the "sub-gate" button counterclockwise and press the "closing" button to open, turn the "sub-gate" button clockwise to turn off, observe the display of the indicator light during operation; dial the "automatic" gear, and the central control room controls the start and stop.
4. Before starting the grille, check the duty record, observe whether there are large obstacles in the water inlet channel, and if there is any, it should be removed first.
5. Before starting, it should be ensured that the drive chain and the tooth rake chain are unobstructed, and the elasticity is appropriate and the lubrication is good.
6. The oil level of the lubricating oil in the motor reduction box is correct, the oil quality meets the requirements, and the ventilation hole should be unobstructed.
7. Jog motor, drive the entire transmission mechanism. The operation should be smooth and there is no abnormal noise. If the operation is not smooth, it should be checked immediately and troubleshooting. This may be omitted after normal operation, but this provision must be strictly adhered to for the first time after a new installation or overhaul.
8. During the operation of the grille, on-site monitoring should be carried out and the large obstacles that the grille cannot be rake removed in time and the debris that is difficult to handle by the screw conveyor, and the inspection should be strengthened on thunderstorms and flood seasons to increase the number of inspections.
9. Before any maintenance and maintenance work begins, the main switching power supply should be cut off, and it should also be ensured that others cannot start.
2. Maintenance procedures
1, the initial operation, each operation, to monitor the motor and gearbox temperature, if the temperature is more stable, can be extended to once a week to detect.
2. Weekly: Drive chain, drive chain and chain reel are coated with calcium-based grease once.
3. Monthly:
(1) Cleaning equipment and surrounding environmental sanitation.
(2) Dredge the ventilation hole of the motor gearbox to ensure unobstructed.
(3) Check the oil level and add when it is insufficient.
(4) Add primary calcium-based grease to the guide rail.
4. After the initial operation of the reducer for 300 hours, the lubricating oil should be replaced for the first time, and the residual oil should be removed when replaced. After each replacement, those who work continuously for more than 10 hours per day will be replaced every 3 months; those who work for less than 10 hours per day will be replaced every 6 months. The lubricating oil is made of 150 grade industrial gear oil.
Shaftless screw conveyor
1. The operator should be familiar with the structure and working principle of the screw conveyor.
3. The duty record should be checked before starting the conveyor.
4. Dial the "manual" gear, turn the "split gate" button counterclockwise and press the "close" button to open, turn the "split gate" button clockwise to close, observe the display of the indicator light during operation; dial the "automatic" gear, and the central control room controls the start and stop.
5. The oil level of the lubricating oil in the motor reduction box is correct, the oil quality meets the requirements, and the ventilation hole should be unobstructed.
6. During operation, hard objects exceeding 30cm are not allowed to enter the conveyor.
7. Check whether there is vibration or other abnormal noise, if there is, stop and check.
8. Before any maintenance and maintenance work begins, the main switching power supply should be cut off, and it should also be ensured that others cannot start.
2. Weekly: cleaning equipment and surrounding environmental hygiene.
(1) Check the lubricating oil grease at the bearing and add it when it is insufficient.
(3) Check the oil level of the gearbox and add it when it is insufficient. Use CLP VG220 lubricant.
(4) Check the operating noise and vibration of the motor and gearbox.
4, the reducer after 2000 hours of work need to replace the new oil, the conveyor work after 6000 hours to check the nylon liner, such as excessive wear, should be replaced in time.
Sand removal equipment for sand grit ponds
1. The operator should be familiar with the structure and working principle of the sand removal equipment of the griting tank.
3. Before starting the sand removal equipment of the grit pond, check the duty record and the indication switch of the PLC control cabinet.
4. In cold weather, the water in the piping system of the vacuum start device must be drained after use to prevent freezing.
5, dial the "manual" gear, the paddle drive device and the sand pump run independently of each other, respectively by the corresponding switch control start and stop, counterclockwise rotation to open, clockwise rotation to close, under normal circumstances, the paddle drive device should run continuously, sand pump and sand water separator working time in the control panel set;
Dial the "automatic" gear, all equipment in the sand removal system is controlled by the blade drive device switch to start and stop, counterclockwise rotation is on, clockwise rotation is off; dial the "remote" gear, all equipment in the sand removal system is controlled by the central control room. The "Reset" button should be pressed after troubleshooting the sand removal system, and the "Emergency Stop" button should be pressed when an emergency stop is required.
6. When starting the sand removal equipment of the sand grit pond, the operator should observe the vibration and noise of the sand pump on the side, and the problem should be shut down immediately.
7. If you want to increase the separation of organic matter in the inlet water, the height of the paddle should be appropriately lowered, and if you want to increase the removal rate of sand particles and organic matter, the height of the paddle should be appropriately adjusted.
8. Monitor the flow rate of inlet and outlet water daily to ensure that it is within the allowable value of 0.6~1.06m/s.
9. The sand collection bucket of the sand collection pond should not collect too much sand, and the appropriate sand lifting cycle is 3 to 4 hours.
10. Each inspection should check whether the bolt fixing is normal; whether the noise level and temperature of each motor are normal; whether the noise level and temperature of the gearbox are normal and whether there is leakage; whether the noise and temperature of the bearing are normal; whether the noise of the screw conveyor is normal; and whether the motor operating current is normal.
11. Keep the ventilation plug on the gearbox unobstructed.
12, before any maintenance and maintenance work begins, the main switching power supply should be cut off, and it should also be ensured that others cannot start.
1. Paddle drive device
(1) Motor: the main maintenance part is its sealing unit;
(2) Gear reduction unit: ISO 220EP type lubricating oil is selected, the oil volume is 1.8 liters, and it is replaced once every 10,000 hours of operation;
(3) Gearbox: Check the oil level once a month, fill in when insufficient. Iso 68EP No .2 type lubricating oil is selected, the oil volume is 3 gallons (about 13.6 liters), and the new lubricating oil should be replaced in the spring and autumn of each year. Overhauls every six months.
2. Sand lifting equipment
(1) Sand pump: daily inspection
(2) Motor: check twice a year; lubricated with lithium-based extreme pressure grease (NLGI2).
(3) Vacuum start device: check and clean the electrode, electrode chamber, float inspection valve every month
(4) Pump seal: check once a year
3. Sand water separator
(1) Motor: overhauled once a year, lubricated with lithium-based extreme pressure grease (NLGI2).
(2) Gearbox: overhaul once every six months, replace the lubricating oil once a year, select Mobil Glygoyle HE320 or the same type of lubricating oil, the oil volume is 1.5 liters
(3) Flanged bearings: butter is filled once a month
(4) Screw lower bearing: water-repellent grease filled once a month: Kluber staburaggs NUB12 or the same type of grease
(5) Check the sand removal efficiency of the sand water separator once a week
(6) Check the wear degree of the liner once a month
(7) The emptying of the sand water separator and the fixing of each tightening bolt are carried out every six months
centrifugal pump
1. The operator is familiar with the structure, working principle and performance of the sludge pump.
2. Dial the "manual" gear, turn the "split gate" button counterclockwise and press the "closing gate" button to open, turn the "split gate" button clockwise to turn off, observe the display of the indicator light during operation; dial the "automatic" gear, and the central control room controls the opening and stopping.
3. Before the pump starts, the operator should ensure that there is no solid waste of a large size in the pool, and the change of the running noise and current of the pump should be observed when starting, and if there is an abnormality, it should be stopped immediately.
4. The number of consecutive starts within one hour shall not exceed five times, and the dry running time of the pump shall not exceed 30 seconds.
5. The operator should observe the operation status of the pump once an hour and observe its noise and vibration.
6, before any maintenance work begins, the main switching power supply should be cut off, and it should also be ensured that others cannot start.
7. When the fault is alarmed, the operator should immediately stop and analyze the cause.
1. Oil change operation procedure
Remove the screw labeled "oil outlet", and be sure to drain the oil from the oil outlet. The tank may be stressful, and cover the oil plug with a rag to prevent oil splashing.
3. Use the oil pump to pump the oil in the oil purification chamber, install the screws at the "oil outlet hole", and be sure to inject the oil from the "oil injection hole". Replace the old O-ring under the oil chamber screw with a new O-ring each time, put back the oil plug and tighten it, and the tightening torque (submersible pump) is 80N*m.
Check the paint, if damaged, please repaint.
Mineral oil with viscosity classes of ISO VG15 to 32 is recommended for submersible sewage pumps in oil quantities: 4.5 litres for the 600 series drive unit and 5.5 litres for the 700 series drive units. Mineral oil with a viscosity rating close to ISO VG32 is recommended for sludge pumps.
Sludge pumps and submersible sewage pumps should be inspected at least once a year, and if they are under harsh operating conditions, the number of inspections should be increased, and under normal conditions, at least once every three years should be overhauled. If the seal has been replaced, it is recommended to check the oil after one week of operation. Check the condition of the handle and chain once a month.
beater
1. The operator should be familiar with the structure and working principle of the Flygt stirrer.
3. Before starting, the duty record and the instruction switch of the on-site control cabinet should be checked.
5. Continuous operation, the air should not be sucked down by the impeller.
6. It is strictly forbidden to start the agitator frequently, and the dry running time should not exceed 30 seconds.
7. When the fault is alarmed, the operator should immediately cut off the power supply and reflect the situation to the relevant personnel.
8, before any maintenance work begins, the main switching power supply should be cut off, and it should also be ensured that others cannot start.
1. Routine inspection and preventive maintenance can ensure more reliable operation. Inspections are carried out every 8,000 hours of operation and overhauls are made every 50,000 hours of operation. When a new agitator or seal has just been replaced, it is recommended to perform an inspection after one week of operation.
The inspection includes the following items:
(1) Replace all wear parts
(2) Check all screw connections
(3) Check the quality and condition of the oil
(4) Check whether there is liquid in the stator chamber
(5) Check the cable entry and cable condition
(6) Check the function of the boot device
(7) Perform a functional check on the monitor
(8) Check the direction of rotation
(9) Check the electrical insulation
(10) Check the clearance and wear of the lifting equipment and guide rod
(11) Replace the O-ring removed during all inspections
(12) Check and clean the surroundings of the seal
2. Oil change operation procedure
Submersible thrusters
5. Check whether the highest point of the blade and the liquid level are maintained at a normal distance (should not be less than 800mm) before starting.
1. Routine inspection and preventive maintenance can ensure more reliable operation. The thrusters are inspected every 8,000 hours of operation and overhauled every three years of operation. When the new thruster or seal has just been replaced, it is recommended to perform an inspection after one week of operation. The oil contamination of the gearbox should be checked and replaced, and the magnetic plug of the oil nail should be cleaned every 200 hours of operation.
In addition to the inspection of the above items, the workshop overhaul includes the following items:
(1) Replace the bearing
(2) Replace the shaft seal
(3) Replace the oil
(4) Replace the O-ring
(5) Replace the seal of the cable inlet and move the inlet position of the cable
(6) Replace the cable
(1) Hang the agitator horizontally, unscrew the oil discharge screws and oil injection screws.
Note: The oil chamber may be under pressure, hold a rag in your hand to prevent oil from spilling.
(2) After the oil is drained, replace the O-ring and screw the oil discharge hole screw to fill the oil injection hole with new oil. The O-ring of the screw should be replaced each time, the screw should be put back and tightened. The tightening torque is 10-20Nm.
(3) The recommended oil volume for the oil chamber is 1.5 liters, and the pressure oil or hydraulic oil (mineral oil) with viscosity grade between VG15 and 32 is selected, and the normal type of oil from SAE 5 (W) to SAE 25 (W) can also be used.
(4) The gear compartment is made of MOBIL gear 630 or similar oil (ISO VG 220), and the oil volume is 5 liters.
sluice gate
1. The operator should be familiar with the structure and working principle of the gate.
4. Before starting, the duty record and the instruction switch of the on-site control cabinet should be checked. Dial the "manual" gear, press the "on/stop" button to open, press the "on/stop" button to turn off, observe the display of the indicator light and the opening table during the operation; dial the "remote control" gear, and the central control room controls the start and stop.
5. When the operator manually opens the gate, it should be shaken evenly and not allowed to be too strong to prevent damage to the positioning device.
6. When the opening and closing machine is operated manually by electric, the conversion handle should be dialed to the manual position to open and close the gate. If the gate is required to be semi-open, it can be operated by the operator according to the opening indicator.
7, before any maintenance work begins, the main switching power supply should be cut off, and it should also be ensured that others cannot start.
The bearings, nuts, screws and other components of the opening and closing machine are filled with butter once every three months, and the surface of the door is descaled and coated with anti-rust paint once a year.
Electric adjustable weir door
1. The operator should be familiar with the structure and working principle of the electric adjustable weir door.
3. Before starting, the duty record and the instruction switch of the on-site control cabinet should be checked. Dial the "manual" gear, press the "on/stop" button to open, press the "on/stop" button to turn off, observe the display of the indicator light and the opening table during the operation; dial the "remote control" gear, and the central control room controls the start and stop.
4. When the operator opens the weir door with a handwheel, it should be shaken evenly and not allowed to be too strong to prevent damage to the positioning device.
5. When the opening and closing machine is operated by electric to manual, the conversion handle should be dialed to the manual position to open and close the weir door.
If it is required to be in a semi-open state, it can be operated by the operator according to the opening indicator.
The bearings, nuts, screws and other components of the opening and closing machine are filled with butter once every three months, and the surface of the equipment is descaled and coated with anti-rust paint once a year.
Manual butterfly valve
1. The operator should be familiar with the structure and working principle of the manual butterfly valve.
2, manual opening of the butterfly valve generally does not exceed 15 kg of force, if it is very difficult to turn after troubleshooting. When the butterfly valve is closed, the handle should be reversed one or two times, which is conducive to the re-opening of the butterfly valve.
3. There will be sediment deposit areas near the long-term closed butterfly valve, and these sediments will form a resistance to the opening and closing of the butterfly valve. When opening, the opening and closing action should be repeated to promote the loosening of sediment.
If it is found that there is often sediment deposition near the butterfly valve, the butterfly valve should be opened and closed frequently to facilitate the removal of sand accumulation, and the butterfly valve that has not been opened and closed for a long time should also be operated once or twice on a regular basis to prevent rust or siltation.
Check the shaft end every six months for leakage, and if there is a leak, the filler should be replaced in time.
Electric butterfly valve
1, electric butterfly valve has manual, electric two ways of working, manual operation please refer to the manual butterfly valve operating procedures.
2. When the valve is opened or closed, the butterfly plate should be opened to between 5 and 85 degrees and then energized.
3. When the butterfly valve is manually opened and closed, the conversion handle on the electric device should be dialed first. The rotating hand is off clockwise and turned on.
4. Dial the "on-site" gear and use the on-site control cabinet to control the start and stop of the butterfly valve. Press the "open valve" button to open the butterfly valve, press the "close the valve" button to close the butterfly valve, press the "stop" button to open or close the butterfly valve at any time to stop the rotation of the butterfly valve plate, observe the display of each indicator during operation; dial the "remote" gear, and the central control room controls the start and stop.
5. When electric operation, press the electric button to be happy, and the manual automatically changes to the electric operation state.
6. There will be sediment deposit areas near the long-term closed butterfly valve, and these sediments will form a resistance to the opening and closing of the butterfly valve.
When opening, the opening and closing action should be repeated to promote the loosening of sediment. If it is found that there is often sediment deposition near the butterfly valve, the butterfly valve should be opened and closed frequently to facilitate the removal of sand accumulation, and the butterfly valve that has not been opened and closed for a long time should also be operated once or twice on a regular basis to prevent rust or siltation.
1. Check the shaft end every six months, and replace the filler in time if there is a leak.
2. After the electric device is disassembled and repaired, the torque limiting mechanism should be adjusted again to the torque range specified in the manual.
Full bridge squeegee
1. The operator should be familiar with the structure and working principle of the full bridge scraper.
4. Check whether the machine works normally once an hour, and if there is an abnormal phenomenon, it should be stopped immediately for inspection. There shall be no abnormal noise in the bearing parts in motion, the temperature of the rolling bearing should not be higher than 70 °C, and the temperature rise should not exceed 40 °C.
5, normal conditions should work continuously, if you need to stop, you should first stop the entry of sewage, and then stop after the scraper rotates for a week to prevent mud at the bottom of the pool.
6. If the pool surface is frozen in winter, the scraper cannot work, and it can be used only after the artificial ice is broken.
1. Frequently observe the sediment and sedimentation rate in the pool, determine the downtime, and ensure that the mud accumulation cannot be too long.
2, every half month to check all the collector device, should make the brush and the collector ring in good contact, serious wear should be replaced in time.
3, the whole machine should be stopped once a year to check and maintain, worn parts to be replaced, each fastener should be re-tightened, rust parts should be re-coated with preservatives.
4. Regularly fill the lubrication parts such as motors, reducers, travel wheel bearings, and central rotation supports with lubricating oil or grease as required, and all kinds of oils and greases should be clean and free of impurities.
The motor is filled with ZN-2 calcium sodium grease once a year
Travel wheel bearings are filled with ZN-2 calcium sodium-based grease every six months
Reducer Replace the CLP220 gear oil every six months
Center rotary support bearings are filled with HJ-30 mechanical oil once a week
Sludge dewatering workshop equipment operating procedures
The preparation of this procedure is to standardize the operation actions of the operator, protect the personal safety of the operator and the mechanical equipment from being damaged by human factors, and ensure safe and civilized production.
Operators should understand the performance of various types of machinery and equipment in the sludge dewatering workshop, be familiar with various operating methods and emergency treatment methods, and understand the layout of process pipelines in the workshop. And through the "three-level" safety production education, obtain the operation qualification, can be operated. The operator has the right to refuse operation by non-workshop personnel.
Operating instructions for a sludge dewatering workshop sludge treatment system
In order to protect the mechanical equipment from malfunction due to human factors, the operator should open and close the equipment in strict accordance with this order. For the equipment damage caused by opening and closing the equipment in this order, it is handled according to the relevant regulations of the factory.
Preparation before running:
1. Check the following matters before starting:
(1) Whether the centrifuge is installed correctly and completely
(2) Monitor whether the equipment is perfect and functional
(3) Whether the material path is set up well
2. Flocculant preparation:
(1) Ensure that the concentration of flocculant required for sludge treatment is prepared 30 minutes before operation.
(2) Check the flocculant dosing pump. (Shaft seals, connecting shafts)
(3) Check the flocculant flow meter and pressure gauge.
(4) Check the dilution water system. (Equipment, pressure)
(5) Check whether the valve on the flocculant dosing line is in the correct position.
3. Sludge preparation:
(1) Ensure that there is enough sludge in the homogeneous tank / buffer tank, at least 1.5 / 1.3 meters deep sludge.
(2) Check the submersible agitator.
(3) Check the level gauge.
4. Sludge treatment system preparation:
(1) Check the cutting machine. Lubricating oil level, reliable guard, no loosening, no cracks, front and rear valves in the open position.
(2) Check the sludge pump. (Shaft seals, connecting shafts, dry-run protective wiring)
(3) Check the sludge flow meter and pressure gauge.
(4) Check the flushing water system. (Equipment, pressure)
(5) Check whether the valve of the sludge throwing pipeline and the flushing water pipeline is in the correct position.
(6) Check the centrifuge. (Bearing lubrication system, motor support device, main and auxiliary motors, drum protection device, thickener outlet gate valve, screw conveyor)
5. Boot order:
(1) Direct dehydration using the concentrator (manual operation at each interface in the PLC control system)
Open the filler outlet gate valve------ centrifugal concentrator ------ (after the centrifuge reaches normal speed) flocculant dilution system------ flocculant dosing pump------- cutter ------ sludge dosing pump ------- screw conveyor
(2) First concentrate and then dehydrate (manual operation at each interface in the PLC control system)
Shut down the concentrator outlet gate valve------ centrifugal concentrator ------ (after the centrifuge reaches normal speed) Flocculant dilution system------ flocculant dosing pump------- cutting machine ------ sludge dosing pump ------ (to be buffered to reach 1.3 m) submersible agitator ------ centrifugal dehydrator ------ (after the centrifuge reaches normal speed) Flocculant dilution system ------ flocculant dosing pump------ sludge dosing pump ------- screw conveyor
(3) Fully automatic control.
Check that the manual valves for each process line are in the correct position.
Then check that each device in the PLC control system is in an automatic state. Then open the centrifuge on the P2 interface and click "operation" corresponding to the centrifuge, click "product on" to start processing.
5. Precautions for inspection during operation:
(1) Check the work of the flocculant preparation station and the dosage of the drug bucket.
(2) Chajia medicinal water pump working situation.
(3) Check the working conditions of the four flocculant pumps, mainly including the housing temperature, motor temperature, sealing letter and vibration.
(4) Check the working conditions of the four dilution devices, mainly including water pressure and water quantity.
(5) Check the working conditions of the four sludge dosing pumps, mainly including shell temperature, motor temperature, sealing letter and vibration.
(6) Check the homogenization pool and buffer pool, mainly including the liquid level, the working conditions of the underwater thruster and whether there are floating objects in the pool that are not conducive to subsequent process treatment.
(7) Check the working conditions of the four centrifuges, mainly including the cleanliness of the separation liquid, the quality of the mud, the motor temperature, current, voltage, vibration, drum speed, speed difference, drum lubrication, gearbox lubrication, and bearing torque. If the quality of the sludge is not good, the amount of centrifuge or flocculant should be adjusted and recorded in detail.
(8) Check the working situation of the screw conveyor, mainly including the motor temperature and whether there is any jam in the aggregate groove.
(9) Centrifuge may fail and processing methods.
Note: For sludge dewatering workshop equipment, if there is an abnormal situation, it should be monitored continuously for 30 minutes, if the abnormality has a gradual increase trend, emergency measures can be taken and reported.
If the abnormality is automatically eliminated or is stable, it should be recorded in detail and the inspection should be strengthened here.
When the centrifuge vibration is greater than 14 mm/s, the centrifuge should be turned off immediately.
6. Shutdown sequence:
Thicker Shut off the sludge dosing pump----- shut down the cutting machine------ close the flocculant dosing pump----- open the medicine circuit vent valve------ open the mud vent valve----- open the flushing water pump------ open the flushing water solenoid valve (30min) ------ close the centrifuge------- close the flushing water pump------ close the flushing water solenoid valve
The dewatering machine closes the sludge dosing pump------ closes the flocculant dosing pump----- opens the medicine circuit vent valve------ opens the mud vent valve----- opens the flushing water pump------ opens the flushing water solenoid valve (30min) ------ closes the centrifuge ------- closes the flushing pump------ closes the flushing water solenoid valve
7. Parking and regular maintenance:
(1) Close the flocculant dosing pump at the same time as closing the centrifuge feed pump.
(2) The feed tube is injected with the appropriate cleaning solution into the bowl.
(3) When the discharge liquid becomes clean, turn off the centrifuge.
(4) Empty the liquid in the bowl.
(5) Start the centrifuge again until no liquid is discharged from the slag outlet.
(6) Repeat the above process twice.
(7) Turn off the rinse water.
concentrate:
(1) The water supply shall not be stopped before the speed of the drum is reduced to 300 rpm.
(2) The amount of cleaning water should be greater than 1000 liters / hour.
(3) After cleaning, ensure that there is no standing water in the bowl.
(4) In case of emergency shutdown, the accumulated mud in the drum should be emptyed. (At this time, ensure that the centrifuge is in a shutdown state and open the locking device)
Instructions for the operation of the flocculant preparation system
Sludge workshop operators should undergo special training before operating the flocculant preparation system and be familiar with the structure and performance of the equipment. And follow this instruction.
1. Check the pre-dissolving tank, water injection components, preparation of mature tanks, storage tanks and related pipelines and other components should be intact and clean and free of debris.
2. Check whether the dosage in the drug tank meets the requirements.
3. Check the amount of oil in the gearbox.
4. Check the opening of the valve.
5. Check the relevant parameter settings of the control panel. (Concentration, mixing time, etc.)
6. Check the control mode of the flocculant preparation system.
7. Other maintenance according to the equipment and on-site conditions.
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