Daily maintenance method of acid and alkali resistant centrifugal pump

1. The inlet and outlet pressure, flow and motor current of the centrifugal pump shall be kept in the normal use standard, and it is prohibited to pump for a long time. The flow and head of the acid and alkali resistant centrifugal pump shall be controlled within the range indicated on the signboard as far as possible to ensure that the acid and alkali resistant centrifugal pump operates at the design point, so as to achieve the effect of energy saving and consumption reduction.
2. During the operation of acid and alkali resistant centrifugal pump, the bearing temperature shall not exceed the working temperature by 50 ℃, and the upper limit shall not exceed 90 ℃.
3. Check the sealing condition of centrifugal pump frequently, and report to the workshop for maintenance in case of leakage.
4. Always check the quality of lubricating oil and oil level indicator in the oil tank, and replace them immediately if they are found to be deteriorated to avoid false liquid level.
5. The filter press pump shall be sealed with cooling circulating water. The cooling circulating water shall be kept smooth. The cooling circulating water shall not be interrupted within one week after the new seal ring is replaced.
6. Check whether the pump base and motor are firm. If they are loose, the centrifugal pump will vibrate. Stop the pump immediately to check the root cause when the pump makes an abnormal noise.

7. The centrifugal pump shall be operated for 300 hours within 3 months to replace the lubricating oil, and the lubricating oil shall be replaced within 3-6 months for the second time. After 6~12 months, it shall be lubricated and replaced.
8. Check the condition of instruments and leads to see if the pipes are leaking or loose, or damaged in other forms. If maintenance is needed, it should be carried out immediately.
9. Whether the mechanical seal is always leaking. If there is a leak, the compression degree of the moving ring should be adjusted in time to ensure that the sealing surface does not leak. Do not press too tightly to reduce the service life of the sealing property. Note: The filter press pump is the most demanding working condition in the process flow, and also the position with the largest consumption of spare parts. When the sealing leakage is not serious, the seal will not be replaced. Generally, the closed circulation reuse system of the leaking liquid should be considered in the design, but it is subject to the scarcity of materials.
10. When the acid and alkali resistant centrifugal pump is used in cold winter, the liquid in the pump body and pipeline shall be completely discharged when it is stopped. Avoid freezing.
11. If the acid and alkali resistant centrifugal pump is not used for a long time, it is necessary to disassemble all the pumps, wipe off the water, coat the rotating parts and joints with grease, and install them properly for maintenance.
12. For pumps that are not used, turn the gear once before each shift to ensure that the pumps are in good use.
13. When the acid and alkali resistant centrifugal pump is to be stopped, first turn off the valve and pressure gauge, and then disconnect the motor power supply.

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