Nonmetal internal inflow pore plate type fine grid system

Abstract

The invention belongs to the technical field of separation equipment, and discloses a nonmetal internal inflow orifice plate type fine grid system which is provided with a rack; the rack is arranged in the center of a grid well, a water inlet is formed in the upstream end of the lower portion of the rack, and the opposite side of the water inlet is a closed end; guide rails are arranged on a frontwall plate and a rear wall plate of the rack; an internal slag collecting tank is also arranged at the upper part of the rack and extends to the exterior of the internal slag collecting tank; flow guide baffles are arranged between the two sides of the upstream end of the machine frame and a canal wall, a forward output shaft of the machine frame is connected with a driving motor, traction chainwheels and guide devices are arranged on the upper portions and the lower portions of the two sides of the machine frame, screen plates are arranged on the traction chain wheels, a cleaning device isarranged on the side face of the machine frame, and an electric control box is arranged close to the machine frame. The structure design has reliable self-cleaning capacity, the phenomena of dirt winding and clamping stagnation are avoided, and no dirt is accumulated at the bottom of the grid, so that no dead angle is formed. A brush does not need to be rotated to clean the sewage interception surfaces of the screen plates, and the combined nonmetal filter screen plates have enough strength and rigidity.

Description

technical field [0001] The invention belongs to the technical field of separation equipment, and in particular relates to a non-metallic internal inflow orifice type fine grid system. Background technique [0002] At present, the closest existing technology: the process of purifying sewage to meet the water quality requirements of a certain water body for drainage or reuse is called sewage treatment. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. The orifice-type fine grid is a device used to filter sewage, so that the impurities inside the sewage are filtered out, and then the next step of treatment is carried out. The internal inflow orifice-type fine grid is that the unfiltered sewage directly enters the inside of the grid a grille. The existing o...

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Problems solved by technology

[0006] (3) The filter plate is prone to plastic deformation and affects the normal operation of the equipment

The mesh plate made of steel or other metals makes it difficult for hair flocs or fiber flocs to pass through, which is easy to form entanglement or blockage, and it is difficult to effectively remove the adsorption of hair flocs or the flocs existing in sewage Fiber

[0009] The selection requirements for the stencil are extremely high. If steel or other metals are used as the material, the net size of the designed mesh is 3mm. Long-term immersion in sewage will easily lead to corrosion and the pore size will expand, and hair flocs or fiber flocs will easily fall from the stencil. If it flows through the medium, it will not be able to effectively remove the adsorption of hair flocs or the flocculent fibers in the sewage; the pore size is designed to be 3mm, and the fluid will easily become entangled or blocked when passing through the pores, resulting in the flow rate through the net

Sewage flows out through the orifice plate from both sides of the grille, and suspended matter such as filter residue, hair, fiber, etc. is trapped on the inner wall of the orifice plate. If it is not cleaned for a long time, the permeability of the grille will decrease, which will affect the normal sewage treatment.

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