Secondary solid-liquid separation equipment and separation method for feces and sewage

Abstract

The invention discloses a two-stage solid-liquid separation device and separation method for feces and sewage, wherein the solid-liquid separation device includes a first-stage inclined screen separator, a second-stage filter screen separator formed under the first-stage inclined screen separator, and a second-stage filter screen separator formed under the first-stage inclined screen separator. A screw extrusion dehydrator on one side of the secondary filter screen separator, the primary inclined screen separator is used for solid-liquid separation of coarse particles and primary separation liquid, and the secondary filter screen separator is used for solid-liquid separation Fine particles and secondary separation liquid are produced, and the screw extrusion dehydrator is used for dehydration of coarse particles and fine particles. Implement the present invention, through the first-level treatment of feces and sewage through the first-level inclined screen separator, the coarse particles and the first-level separation liquid are separated, and then through the second-level treatment of the second-level filter screen separator, the fine particles and the second-level separation liquid are separated. The separation liquid, coarse particles and fine particles are dehydrated by the screw extrusion dehydration mechanism, the solid removal rate is higher, and the COD value is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of solid-liquid separation, and more specifically relates to a secondary solid-liquid separation equipment and separation method for feces and sewage. Background technique [0002] The main equipment for solid-liquid separation of feces and sewage in the prior art is the screw extrusion type, and the sieve gap of the screw extrusion type equipment can be as low as 0.45 mm or less, so the slag is relatively fine. At the same time, in order to increase its processing capacity, some manufacturers use it in conjunction with inclined screen solid-liquid separation equipment, so that feces and sewage first flow through an inclined screen solid-liquid separation equipment, and then flow into the screw extrusion equipment after preliminary separation. Although the oblique screen + screw extrusion solid-liquid separator in the prior art is relatively effective in terms of output and slag discharge level, it is limite...

AI Technical Summary

Problems solved by technology

[0002] The main equipment for solid-liquid separation of feces and sewage in the prior art is the screw extrusion type, and the sieve gap of the screw extrusion type equipment can be as low as 0.45mm or less, so the slag is relatively fine.

At the same time, in order to increase its processing capacity, some manufacturers use it in conjunction with inclined screen solid-liquid separation equipment, so that feces and sewage first flow through an inclined screen solid-liquid separation equipment, and then flow into the screw extrusion equipment after preliminary separation. Although the oblique screen + screw extrusion solid-liquid separator in the prior art is relatively effective in terms of output and slag discharge level, it is limited to the solid-liquid separation process itself, but it cannot reduce the COD value and suspended solids. The removal rate is low (about 50%), and finer particles cannot be filtered (the solid-liquid separation equipment in the existing technology can theoretically filter particles with a diameter smaller than 0.35mm), and the filtration effect cannot meet market demand

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