Closed semi-vacuum sewage system

Abstract

The invention relates to a closed semi-vacuum sewage draining system. The system connected between a bathroom drainage system and a municipal pipe network is used for conducting sewage draining work and characterized in that the sewage draining system comprises closed black water tanks and a vacuum pump station, the output end of the bathroom drainage system is communicated with at least one sewage inlet of each black water tank, a grid used for filtering impurities in sewage is arranged on the portion, close to the corresponding sewage inlet, in each black water tank, a vacuum tank capable of conducting sedimentation treatment on the sewage and a separation tank assembly capable of collecting sedimentary dirt in the vacuum tank are arranged in the vacuum pump station, the vacuum tank is connected with the black water tanks and the separation tank assembly respectively, sewage draining valve groups are arranged in the connecting paths of the black water tanks and the vacuum tank, and the vacuum tank is communicated with the municipal pipe network through sewage draining pump groups. The closed semi-vacuum sewage draining system has the advantages that the air impermeability is good, odor leaking can be prevented, and three-stage separation of the dirt in the sewage can be achieved at the same time to reduce the blocking probability.

Description

technical field [0001] The invention relates to the technical field of sanitation sewage discharge, in particular to a closed semi-vacuum sewage discharge system used for drainage of toilets in underground buildings. Background technique [0002] At present, the drainage system of domestic subway public toilets is mostly the traditional gravity drainage system, that is, a special sewage pump room is set up, and a concrete-structured settlement tank is built in the sewage pump room. Fecal dirt and sewage in the toilet flow into the sedimentation tank by flushing water pressure and gravity. When the sewage in the settlement tank is stored to the set level, the submersible sewage pump in the settlement tank starts to discharge the sewage accumulated in the tank to the municipal pipe network, that is, one pit with two pumps. This toilet drainage system has following deficiencies: [0003] 1. The transportation pipeline must have a certain slope. When the pipeline reaches a cer...

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Problems solved by technology

[0003] 1. The transportation pipeline must have a certain slope. When the pipeline reaches a certain distance, a lifting pump station must be established to lift the sewage and wastewater to a certain height and then transport it downwards, thereby increasing energy consumption and construction costs.

[0004] 2. The delivery pressure of gravity flow is limited, so in order to avoid blockage, the diameter of the delivery pipeline must be large enough, which increases the construction cost

[0005] 3. The settling tank with concrete structure must be set in the space of the basement of the bathroom, and the drainage on the same floor cannot be realized, and the floor area is large

[0006] 4. When the settlement tank with concrete structure is designed as a manhole for maintenance, it cannot be sealed, which leads to the overflow of fecal sewage odor in the settlement tank, the breeding of mosquitoes and flies, and the spread of germs, causing extreme damage to the sewage pumping room and its surrounding environment. big pollution

[0007] 5. The submersible sewage pump installed in the sedimentation tank is often blocked by some silk stockings and other fabrics. The maintenance personnel have to wear protective clothing and enter the sedimentation tank to clean the blockage. The working environment of the maintenance personnel is extremely harsh

[0008] 6. After the submersible sewage pump discharges sewage every time, there must be a certain level of sewage at the bottom of the sedimentation tank. If it is stored for a long time, sludge will be deposited. Therefore, maintenance personnel need to regularly carry out dredging treatment on the sediment in the sedimentation tank

[0012] 2. A vacuum leak will cause the entire system to collapse

[0013] 3. Compared with the existing gravity flow sanitary ware, the structure of vacuum sanitary ware is complex and the cost is too high

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