Application of Vacuum Pump in Lithium Bromide Absorption Refrigerator
Leybold vacuum pump SV300B is an oil-sealed mechanical vacuum pump. Its working pressure range is 101325~1.33×10-2 (Pa), which belongs to low vacuum pump. It can be used alone or as a backing pump for other high vacuum pumps or ultra-high vacuum pumps. It has been widely used in the production and scientific research departments of metallurgy, machinery, military industry, electronics, chemical industry, light industry, petroleum and medicine. How to use vacuum valve for lithium bromide absorption chiller?
The vacuum areas of the Leybold vacuum pump SV300B and cooling water for vacuuming of lithium bromide absorption chillers, and the water ring vacuum pump for diversion of refrigerant water pumps are medium vacuum and low vacuum respectively. Therefore, ordinary vacuum valves such as diaphragm vacuum valves, low vacuum stop valves and high vacuum butterfly valves can be used.
When the Leybold vacuum pump SV300B is used for vacuuming of a bromine cooler, if the vacuum pump stops working for some reason, the mechanical oil in the pump enters the unit due to the pressure difference, causing the pollution of the lithium bromide solution. Therefore, it is necessary to install an electromagnetic belt venting vacuum valve on the inlet pipe of the vacuum pump. The valve is powered by electromagnetic and is connected to the same power supply as the vacuum pump to start and stop synchronously. After stopping, it will vent to the pump inlet to prevent mechanical oil return.
There are many aspects that need to be paid attention to during the use of the Leybold vacuum pump SV300B. If it is used improperly, it will have a great impact on the entire vacuum system, and even bring great economic losses to the enterprise. According to years of practice, Punok’s technicians Experience, the following summary of the precautions for the use of vacuum pumps, I hope it will be helpful to everyone.
- If the pumped experimental system has condensable vapor or volatile liquid or corrosive gas, the vacuum pump cannot be used to pump the system directly. The condenser and scrubber should be connected between the system and the intake pipe of the pump. Bottle or absorption bottle to remove the above gas.
- A three-way piston should be connected before the intake pipe of the pump. Before the Leybold vacuum pump SV300B stops running, the air inlet of the pump should be communicated with the atmosphere through the three-way piston to prevent the pump oil from contaminating the experimental system.
