Integrated dehydration process based on high-dryness sludge extrusion device

Abstract

The invention discloses an integrated dehydration process based on a high-dryness sludge extrusion device. The integrated dehydration process comprises the following steps: S1, extruding sludge for the first time by using a conical spiral sludge concentration device; s2, carrying out secondary extrusion by using a belt type extrusion filter; and S3, carrying out third extrusion treatment through the high-dryness sludge extrusion device to obtain the high-dryness sludge. By means of the dewatering technological process of the steps S1 to S3, low-energy-consumption and low-cost sludge dewatering treatment is achieved, and the drying rate of the treated sludge reaches 40% or below. According to the high-dryness sludge extrusion device, the movable pressing plate and the sliding pressing plate in the high-dryness sludge extrusion device are arranged to be of a concave-convex extrusion structure, a continuous concave-convex extrusion structure is formed among the multiple continuous extrusion plate assemblies, overflow is avoided, and the extrusion efficiency and the sludge extrusion stability are improved. The variable-pitch stepped sludge concentration device is arranged, and the extrusion pressure in the conical spiral sludge concentration device is increased from small along with the decrease of the pitch, so that the first-time pressure progressive extrusion is realized one by one.

Description

technical field [0001] The invention belongs to the field of sludge extrusion equipment manufacturing and process design, and in particular relates to an integrated dehydration process based on a high-quality sludge extrusion device. Background technique [0002] With the country's strengthening of water pollution control, the problem of sludge disposal has become increasingly apparent and attention has been paid to it. From sludge composting to assisted combustion and landfill. Due to the high moisture content of sludge, large drying energy consumption, and high cost constraints, the treatment effect is not good, and it is easy to cause secondary pollution. Therefore, how to maximize the dehydration efficiency has become the focus of current research. At this stage, sludge dewatering equipment also has disadvantages. At present, the traditional sludge dewatering technology and equipment mainly include belt filter dewatering machines, centrifugal sedimentation filters and p...

AI Technical Summary

Problems solved by technology

However, after dehydration by the electroosmotic sludge dewatering machine, the upper layer of the sludge is dry and the lower layer is wet, which still cannot achieve the purpose of overall drying and the cost is very high

There is also a patent CN201511015321.X disclosing a high-dryness sewage sludge treatment method, which mainly uses active gas to oxidize the sludge squeezed in the spiral filter device, and then enters the ultra-high voltage electroosmotic dehydration The device dewaters to obtain high-dryness sludge, but the production cost is high and the energy consumption is high

[0004] However, the technical problems solved by the above technical solutions only consider the problem of sludge drying, and the use environment brought about by the dehydration device, the consumption of equipment energy consumption, and the cost of use have not been well coordinated. It is only a short-term means of sludge treatment

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