Solid-liquid separation method and device for viscous material

Abstract

The invention relates to a solid-liquid separation method and device for a viscous material. The method comprises 1) driving a breast roller to rotate through a motor so that a coarse cotton cloth isdriven to move, physically stirring the materials in a stirring tank, feeding the mixture into a material feeding tank through a feeding pump, continuously inputting the materials into a main machineand discharging the materials to a conveying mechanism through a material nozzle, 2) conveying the materials through a filter belt of the conveying mechanism, carrying out preliminary vacuum drainagethrough a vacuum box in the input section, conveying the materials to a mesh cage and an auxiliary roller and carrying out preliminary extrusion drainage, wherein the materials on the coarse cotton cloth pass through the auxiliary roller and move, 3) conveying the materials on the coarse cotton cloth to an output section, carrying out secondary vacuum drainage through a vacuum box in the output section of the coarse cotton cloth and separating the materials from the coarse cotton cloth at the breast roller, and 4) conveying the coarse cotton cloth to the auxiliary roller and carrying out nextsolid-liquid separation process cycle. The method and device realize fully mechanized solid-liquid separation of the viscous material, have low moisture content of sludge, effectively utilize the materials, save a cost and protect the environment.

Description

Technical field [0001] The invention relates to the field of environmental protection, in particular to a solid-liquid separation method and separation equipment for viscous materials without adding any medicine. Background technique [0002] Viscous materials such as sludge and slag have high water content and cannot be directly used as waste. In terms of sludge treatment technology, the current sewage treatment technologies are as follows: [0003] 1) Sludge landfill: This method is the most common method in the existing technology and has low cost, but it will occupy a large amount of land, pollute groundwater, and spread diseases. [0004] 2) Land fertilization: The sludge is rich in organic matter such as nitrogen, phosphorus and potassium, which can be absorbed and utilized by plants, but because the sludge contains heavy metals with variable concentrations, after being absorbed by plants, there will be great uncertainty in the subsequent biological chain pollution. Need to b...

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Problems solved by technology

[0004] 2) Land fertilization: sludge is rich in organic matter such as nitrogen, phosphorus, and potassium, which can be absorbed and utilized by plants. However, because sludge contains heavy metals with variable concentrations, after being absorbed by plants, there is great uncertainty in the pollution of the subsequent biological chain. Careful evaluation and use is required

However, the existing sludge has a high water content and cannot be directly used by the combustion system of the power plant, and the cost and energy consumption of deliberate combustion are serious

[0006] 4) Adding flocculant: due to various defects, no real large-scale industrial production has been formed

However, due to the high water content and the inability to remove the flocculant, the treated sludge cannot be used in large quantities in agricultural production, resulting in serious waste of resources and environmental pollution.

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