Rotary vane vacuum pump in vacuum sewage system

The traditional method of urban sewage discharge is to use gravity supply mode, but in recent years, there are higher requirements for drainage system, creating a market demand of vacuum drainage technology. In several, commonly used liquid type forms, traditional indoor and outdoor vacuum drainage systems are used, and a rotary vane vacuum pump is used. This paper focuses on the application of rotary vane vacuum pump vacuum blowdown system, and introduces the key technology in the way of vacuum sewage system.

Vacuum sewage suction technology as a special condition, complex terrain and general industrial, commercial and residential sewage treatment projects, has great flexibility of sewer scheme.

The composition and key technology of vacuum drainage system, the following will tell you.

There are three main components in the vacuum drainage system, which are conveying sewage by vacuum suction, collecting dirt, dry vacuum device, vacuum drainage pipe network and vacuum sewer system of pumping station.

(1) The vacuum system of the vacuum collection device, various forms of the initial end. According to the type and the installation position of the vacuum collection, the vacuum sewer system device is divided into a vacuum sewer system of an indoor and an outdoor vacuum sewer system.

(2) the vacuum manifold is used for drying the mesh pipe in the sewage collection box of the vacuum station, and is connected to the valve shaft. The vacuum drain pipe connected to the main pipe from the outlet of the vacuum manifold is referred to as the valve interface. When the vacuum sewage collection well valve sewage pipe to the branch main pipe, and then into the main distribution pipe, the whole pipeline serves as the vacuum platform of tree distribution network. Mainly by the main pipe, elbow, and riser part of the cut-off valve. In order to facilitate the transmission of sewage, multiple sections are set up to obtain the lifting height by using the “sawtooth” pipe inclination, i.e. local lifting. Although the pipeline of the vacuum sewage system is blocked, for the prevention of accidents, a dredging hole is provided in the low area of the riser section, which opens when the pipe blockage is removed by ambient atmospheric pressure.

(3) Vacuum pump station, the core of vacuum sewage system, including vacuum pump, vacuum tank, sewage pump and electric control. In order to prevent steam and debris from entering the vacuum pump and reduce the service life of the vacuum pump, the vacuum container tank, the vacuum pump and the collection tank are between each other. And maintain the vacuum pump to create a group of systems, typically -0.06mpa ~ 007mpa, negative pressure, when the water level of the water tank reaches the set value, it will push the sewage vacuum tank, the pump will automatically open the sewage, and the urban sewage will enter the sewage pipe network or to the sewage treatment device.

The above vacuum pump and rotary vane vacuum pump are recommended. Because it is obtained low in one and vacuum pump main pump types. It can be divided into dry pump and pump seal. The required vacuum can be single-stage or double-stage pump. Vacuum drainage system has special rotary pump: a significant saving, buried pipeline depth, small slope, easy to pass through obstacles, blocking and leakage, no odor, sanitary conditions, etc.

Finally, in the application evaluation of rotary vane vacuum pump, the noise equivalent sound level can be low in a vacuum sewage system; the construction is convenient and suitable for all kinds of terrain; the mining depth is shallow; the mining cost and the impact on the environment are reduced; the maintenance cost is reduced; the vacuum pipe network is used to avoid the phenomenon of running, dripping and leakage in operation, which will not pollute the surrounding environment; Vacuum drainage system, low energy consumption; vacuum drainage system is easy to monitor; required vacuum power source; less management personnel; it not only saves the treatment cost, makes full use of water resources, and reduces the pollution to the environment.