Low-temperature dried sludge filter pressing equipment with heat recovery function

Abstract

The invention discloses low-temperature dried sludge filter pressing equipment with a heat recovery function, and solves the technical problem of sludge dewatering and drying with low cost and high efficiency; the technical scheme is as follows: the equipment comprises a slurry feeding part, a plate-frame filter pressing and drying part, a feeding slurry pipe reverse washing part, a feeding slurrypipe reverse air-blowing water removal part, a plate-frame secondary filter-pressing pressurization part, a plate-frame secondary filter-pressing pressure relief part, a slurry filter-pressed vacuumpart, a slurry filter-pressed preheating evaporation part, a slurry filter-pressed heating drying part, an evaporation drying hot water recovery part and an evaporation drying water storage tank heating part. The equipment has the beneficial effects that the structure is compact, mobile operation can be achieved through the vehicle-mounted structure, the efficiency is high, energy consumption is low, and the water content of treated sludge reaches 25%-40% in a drying state.

Description

technical field [0001] The invention belongs to the sludge dewatering equipment in the technical field of environmental protection, in particular to a low-temperature drying sludge filter press equipment with heat recovery improved based on a plate and frame filter press. Background technique [0002] With the development of society and the increase of urban population, more and more sewage is produced by people's production and life. The harmless treatment of sewage is an environmental protection problem that every city must solve. The most important thing for the harmless treatment of sewage is The sludge generated in the sewage is separated from the sewage, and then the sludge is treated again, but the remaining sludge in the sewage is separated from the sewage by a plate and frame filter press for water filtration treatment. The key technical parameters of the plate and frame filter press for water filtration treatment are: 1. Filtration time, the less time, the higher t...

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Problems solved by technology

However, the existing heating and evaporating water consumes a lot of energy, and the processing time is as long as 3-5 hours each time. The cost is high and the processing capacity is small, which is difficult to meet the industrial application.

[0005] The disadvantages of the prior art are: because the mud contains a large amount of cellular water, the mud has high elasticity, and when the water content in the mud reaches 60--70% by pure mechanical extrusion, the plate and frame used in the prior art Type filter press and the water filtration process used have reached the limit. The heating and evaporating water used in the equipment in the prior art consumes a lot of energy, and the processing time is as long as 3-5 hours each time. The cost is high and the processing capacity is small, which is difficult to meet industrialization. use

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