Reasons for application of sewage lifter
Issuing time:2022-11-10 14:11
Building toilets in the basement of a building is a common situation in process design.
There are two common approaches:
One method is to set a sump under the ground of the basement, collect the sewage from sanitary ware, and then lift it to the outdoor underground sewage pump well with submersible sewage pump;
The other method is to automatically discharge the sewage in the toilet into the outdoor underground sewage pump well, and use the submersible sewage pump to lift the sewage into the sewage inspection well near the pump well.
The first method has three disadvantages:
First, there are solid substances such as feces in the sewage, which are easy to cause blockage if not cleaned up for a long time;
Second, because the sump is shallow, the operation of submersible sewage pump started and stopped according to the water level is not reliable;
Third, the sump is not airtight, smelly and sanitary.
The second method is to build pump wells outdoors, which are deep, expensive and inconvenient to manage. In addition, the toilet in the building will be set up up and down to make the toilet far away from the drainage riser, but the drainage riser cannot be suspended under the floor slab. At this time, the common method is to thicken the floor cushion, and bury the drainage branch pipe in the cushion to discharge from the floor slab to the drainage riser at a certain slope. In this way, the thickness of the cushion is relatively thick, sometimes up to 350-400mm, which brings difficulties to the use of the toilet and the building layout.
Here, the toilet with automatic lifting and drainage function and the full-automatic sewage lifter are produced