Daily maintenance of the black water circulation pump

LZ: What are the components of the black water medium, and are there any hard particles?

1. Maintain the pump itself to keep the inlet pressure stable. 2. Shutdown pressure relief rate of the vaporizer to prevent cavitation~~~~~~~

Are there any requirements regarding the pH value and CL ions for fresh water and wastewater?

OP, which manufacturer’s black water circulation pump are you using?

Pay attention to the inlet pressure and reduce the time of operation at atmospheric pressure； The inlet filter prevents clogging ； Maintain stable seal water pressure.

First: planned maintenance; second: quality control during maintenance, mainly focusing on aligning the moving equipment, either in a completely cold state or in a completely hot state; third: minimizing the operation time of this pump under abnormal conditions during startup and shutdown.

During routine inspections, pay attention to the pressure of the seal flushing water, as well as the flow rate and temperature of the circulating water; also monitor vibration levels and oil level. Regularly disassemble and clean the valve ball of the inlet valve to prevent scaling

As one of the key pumps in the gasification system, the black water circulation pump is used to transport gray water containing solid particles, and it operates under high temperature and pressure conditions. Proper initial installation and regular maintenance of this equipment are extremely important: 1. For pump selection, it is recommended to choose well-known domestic brands； 2. The pump should be properly aligned during initial installation, and account should also be taken of the thermal stresses in the pipes, with efforts to eliminate stresses in the inlet and outlet pipes ； 3. When establishing the water circulation with the black water circulation pump, it is necessary to check the pressure of the seal water to prevent the high-temperature and high-pressure seal water from damaging the seal ring; also, ensure that the circulating cooling water is in use and that the oil level in the oil seal is normal ； 4. Minimize the operating time of the black water circulation pump in low-pressure areas ； 5. After feeding the gasifier and starting to increase pressure, slowly adjust the water pressure and flow rate of the mechanical seal until normal operation is achieved ； 6. During routine inspections, it is necessary to check that the water level in the mechanical seal and the oil level in the oil seal are operating normally ； 7. When shutting down the vaporization system, it is strictly prohibited to allow too rapid a pressure release, as this can cause cavitation and vapor locking in the pump, leading to damage to the pump casing and body ； 8. Ensure the pump body is properly drained in winter to prevent freezing. The above are my humble opinions; I welcome corrections from those more experienced than me.

When operating at atmospheric pressure, could an excessively early establishment of the large circulation cycle affect the subsequent use of the pump? It seems that prolonged operation at atmospheric pressure can lead to leakage in the mechanical seal under normal operating conditions, after all, the pump is designed for operation at high pressure

It is absolutely forbidden to allow an excessively fast pressure release, as this can cause cavitation and vapor locking in the pump, leading to damage to the pump casing and body How should this be understood? How to damage the pump casing? Thank you very much