The vacuum pump station is mainly composed of vacuum collection tank, vacuum pump, sewage pump and automatic control device.

The vacuum collection tank is used to ensure vacuum and collect sewage. Generally, the lower 1/3 of the tank is used to collect sewage, and the remaining 2/3 of the upper space is used to ensure vacuum. The vacuum collection tank is connected to the vacuum pipeline, and the access port of the vacuum pipeline is generally the middle of the tank. The negative pressure in the tank is generated by a vacuum pump. When the negative pressure is lower than the lower limit, the vacuum pump is turned on, and when the negative pressure in the tank reaches the set upper limit, the vacuum pump automatically stops. A check valve is installed between the collection tanks of the vacuum pump. When the vacuum pump stops running, the check valve is automatically closed to ensure that the gas in the tank does not flow back. A check valve is also installed at the sewage pump port. When the sewage pump stops running, the check valve is automatically closed to prevent the backflow of sewage. A safety valve is also installed on the top of the vacuum collection tank to prevent the pressure in the tank from being too large when the vacuum pump or sewage pump is working.

A seal test is to be carried out before the vacuum station is used. When the terminal valve is closed, start the vacuum pump to make the system negative pressure reach -70kPa, and the negative pressure reduction should not exceed 10% after 1 hour.

The vacuum drainage system started late in my country. It is a new type of drainage system, which is more suitable for basements and other places with special requirements for installation and sanitation. Although its cost is 20%~30% higher than the traditional drainage method, it has obvious advantages in water saving, environmental protection and operation and maintenance. After continuous practice and improvement, it is believed that this drainage system will receive more and more attention in the future.