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Parallel type low-power consumption sludge drying and granulating system

A technology of sludge drying and low energy consumption, applied in biological sludge treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problems of reduced value of sludge resources, high energy consumption, flocculant damage, etc. , to achieve thorough and effective resource treatment, improve dust removal efficiency, and reduce energy consumption

Inactive Publication Date: 2009-01-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sludge drying is the process of evaporating the water in the sludge by providing heat. The traditional drying process usually not only consumes a lot of energy, but also the organic matter in the sludge that can be used as a resource Components (the source of calorific value) and the flocculant that can act as a coagulant will be severely damaged. On the one hand, this reduces the available value of sludge resources, and on the other hand, it affects the granulation performance of sludge. It makes it difficult for the hardness of sludge aggregates to meet the technical requirements for firing lightweight energy-saving bricks and producing cement pressed products

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  • Parallel type low-power consumption sludge drying and granulating system

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Embodiment Construction

[0019] Such as figure 1 As shown, the parallel sludge drying and granulation system includes a heating subsystem, a feeding subsystem, a sludge drying and granulation system, a sludge pretreatment subsystem, and a dedusting and degassing subsystem.

[0020] The heat supply subsystem has a fluidized fluidized furnace 1, a temperature regulator 2, a first damper 3, a second damper 4, a first ventilation duct 5, and a second ventilation duct 6. The heat energy provided by the fluidized fluidized fluidized furnace 1 is controlled by the temperature regulator 2 at 250~400℃, the amount of hot air is controlled by the first damper 3, and sent to the first rotary drying kiln 7 through the first ventilation duct 5, and the amount of hot air is controlled by the second damper 4, and sent to the second rotary kiln through the second ventilation duct 6 Drying kiln 8.

[0021] The feeding subsystem has a sludge feeder 9, a first screw conveyor 10, and a second screw conveyor 12. The sludg...

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Abstract

The invention discloses a parallel-typed sludge drying and graining system with low-energy consumption, which comprises the following parts: heat-supply system, feeder system, sludge drying and graining system, sludge predisposal system, dedusting and deairing system. The invention utilizes tail gas heat completely, which guarantees sludge coagulant without damaging.

Description

technical field [0001] The invention relates to a parallel low energy consumption sludge drying and granulating system. Background technique [0002] Urban domestic sewage and industrial wastewater are treated by sewage treatment plants and discharged after reaching the standard, which is an indispensable environmental engineering measure for the protection of water resources and the construction of urban ecological environment. [0003] The sludge produced by urban sewage treatment plants while treating industrial wastewater and domestic sewage, in addition to inorganic components in the form of minerals, also contains a large amount of refractory organic pollutants and various heavy metal elements. This type of sludge is usually called for municipal sludge. Due to the high water content, large quantity and high concentration of pollutants in urban sludge, if it cannot be properly treated or disposed of, it will not only directly affect the normal operation of urban sewage...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C02F11/02
Inventor 翁焕新陈海燕
Owner ZHEJIANG UNIV