LONGZE 220kw XGJ850 wood pellet machine

01 Preparation before starting In order to ensure the safe operation of the pump, the pump should be fully and carefully checked before starting the unit, especially for the newly installed pump and overhaul pump, more attention should be paid to check the work so as to find out the problem in time. The main checks are as follows: 1, check the unit rotor is flexible and light, the pump is there any metal friction sound, if any, should check the reasons. This inspection often through the crank, that is, the method of rotating the unit's coupling by hand. 2, check the lubricant in the bearing is normal, the oil is clean. 3, check the outlet pipe gate valve opening and closing is flexible. 4, check the pump motor anchor bolts and other connections are loose or off, if tightened or make up. 5, clear the sump on the pump inlet to prevent the debris inhaled after boot damage vane. 6, check the motor and pump steering are the same for the distribution equipment is fixed; for the newly installed pump or overhaul of the pump to check the motor steering is an essential work. 7, check the control system is normal, the instrument shows that is accurate, remote control also check the remote monitoring is accurate and effective. 02 Water Diversion and Startup 1. Water Diversion The working principle of the centrifugal pump shows that the centrifugal pump must be started before starting. Most small centrifugal pumps are generally used irrigation exhaust method, then the bottom of the suction pipe should be equipped with a bottom valve. Water diversion method useful water irrigation, elevated tank irrigation, call pump irrigation. Most large and medium-sized centrifugal pumps use water ring vacuum pump suction diversion method. When pumping, when there is water in the exhaust pipe, it indicates that the suction pipe and the pump are full of water, so you can start the pump to start work. For pumps with self-priming pumps below the sump level, the water inlet valve is opened and the water will automatically fill the suction pipe and pump. 2, start the centrifugal pump is generally closed brake, the operator and the crew do not start too close, until the pump speed is stable, should immediately open the vacuum gauge and pressure gauge on the valve, then the reading on the pressure gauge should Rising to the idle flow when the pump zero flow, said the pump has been on the pressure. Then gradually open the pressure on the valve, then gradually increase the vacuum gauge readings, pressure gauge readings gradually decreased, ammeter readings on distribution boards should be gradually increased. The start-up work is completed when the gate valve is fully open. Pump closing time in the case of the general operating time should not exceed 2 ~ 3min; as time is too long, the pump will continue to flow in the pump due to the circulation of heat, resulting in damage to some parts of the pump. If the motor is closed and found only "om" sound without turning, immediately cut off the power to check the reasons. If the pump rotates without water, stop the pump and check the cause immediately. 03 Centrifugal pump operation and management 1, each pump unit put into operation should promptly fill in the operating day statements on the record items. Computer management, the daily operation of each pump should be entered into the computer data storage system. 2, pay attention to whether the unit has abnormal sound and vibration. Pump in normal operation, the unit should be calm, the sound should be continuous without interruption. Often abnormal sound and vibration is a precursor to pump failure occurs, in this case, should immediately stop checking. 3, pay attention to the unit bearing temperature and fuel inspection. Bearing temperature, the general shall not exceed the ambient temperature 30 ℃ ~ 40 ℃, the maximum does not exceed 75 ℃. In the absence of thermometer, but also can be hand touch, judging by experience, such as feeling very hot, stop checking. 4, The new unit uses ball bearings with grease. The first oil change time is 80 ~ 100 hours after the unit is running, and the oil will be changed once every 2400h after using the lubricant (twice with molybdenum disulfide lubricant). Where the use of mechanical oil-lubricated bearings, oil change every 240h time, and should always pay attention to the oil surface should be between the two scales of oil ruler, deficiencies should be raised at any time. 5, packing box drip level, as long as the general control can be divided into drops, not a continuous line, that is, 20 to 150 drops per minute. How much water can be loose, tight packing gland to control. Be careful not to unilateral compression to prevent wear bushing and gland. 6, Regularly check the bolts and bolts on the couplings and units. If any deviation or looseness is found, it should be promptly corrected. 7, pay attention to changes in the instrument pointer. In normal operation, the position of the meter pointer should be substantially stable at a certain point. If the instrument pointer changes and beats, you should immediately identify the cause. For example, an increase in the gauge reading may be due to a blockage of the suction nozzle or a decrease in the water level in the water supply. The reading of the pressure gauge may be clogged with a pressurized water pipe; the reading of the pressure gauge may be a leak in the suction pipe, Should be reduced speed, the impeller is blocked and so on. On the motor, should pay attention to the ammeter reading exceeds the rated current of the motor, the current is too large or too small should be promptly stop inspection. 8, large pump group, such as the use of water-cooled bearings or circulating oil cooling motor, should maintain the smooth flow of oil and water circuit, such as circulating cooling system out of trouble, should immediately stop pumping overhaul. 9, Note changes in the suction well water level, such as suction wells below the minimum design water level, should be properly switched off one or two units to avoid cavitation, damage to the impeller. In general, urban sewage generally lacks water for a period of time from midnight to eight in the morning and deserves special attention. 10, no insulation measures of the pump unit, the pump does not run in winter, the pump should be put away from the bottom of the threaded pipe plugging water storage, to prevent the pump cracking. A long time no pump should be put aside to keep water. 04 Centrifugal pump parking Centrifugal pump parking, the centrifugal pump should be closed before the vacuum gauge and pressure gauge valve, and then slowly close the pressure on the valve, the implementation of closed parking. After parking, pay attention to wipe the surface of the pump and motor water and sludge. Pump for a longer period of time or winter parking, the pump should immediately release the water inside the net. For some problems that can not be handled in operation, it should be dealt with promptly after stopping. For pumps with a higher head, pay attention to possible damage to the pump when stopping the pump. In general, the pump system in the design has been taken into account the impact of stopping the pump, for the operator to note is that we must always ensure that the water hammer to eliminate the system intact and effective in order to stop the pump or sudden failure Pumping effectively reduce the impact of water hammer to a minimum. Centrifugal submersible pump water treatment equipment installation and use of a submersible pump installed two kinds of fixed and mobile. The fixed lower part has a base on which the pump can be placed. The pump can be lowered along the guide rail and attached to the base. The outlet of the pump can be coupled with the fixed outlet, and the nozzle can be automatically disengaged when lifting. Some large fixed-mounted submersible pump outlet and the outlet pipe is flanged; mobile submersible pump outlet hose can be installed at any time according to need placed in the water. 2, before starting the pump should be carefully checked in the transport, storage, installation process without distortion or damage, the fastener is loose or off. 3, check the oil chamber for oil, oil is clean. 4, before starting the impeller should check whether the flexible rotation. 5, check the power supply is reliable, voltage, frequency is in line with the provisions, such as motor reversal should immediately transfer any two wiring position to make it forward. 6 ,. Check the power supply is safe, reliable, normal. Supply voltage, frequency should meet the regulations. 7, check the cable is damaged, broken, the junction box seal is intact and found that any non-compliance should be properly handled. 8, It is forbidden to use the cable of the pump as hanging wire to avoid danger. 9, the new pump before use and long-term placement of the pump is enabled before the application of megger measurement of the shell insulation, should not be less than 2MΩ, otherwise the motor winding should be dried. 10. If the pump works in the sludge well, because the well may have flammable gas such as methane, the control cabinet should be far away from the wellhead and the pump body should be fully immersed in water or mud to avoid explosion. 11, the mobile submersible pump installed from the sewage or sludge after the application of water pump outside the pump rinse, the best run in clean water for a minute or two. 12, the mobile installation of the pump after use should be removed from the water, long-term immersion in the water will reduce the life expectancy, especially in winter, freezing will cause great damage to the pump, and even pump scrapped. 13, either fixed installation of the pump or mobile installation of the pump should be gently. 14, submersible pump in the water environment, the test run time should not exceed 2 ~ 3min. 15, before moving the submersible pump position, you must cut off the power. 16, submersible pump starts, due to the reaction of the rotation, the whole pump will happen sharp twist phenomenon. Large and medium-sized pump torque can not be ignored, and sometimes the connecting hose twist away from the connector, so the installation should pay attention to the firm connector, twist, be careful not to hit hard structures.