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Sludge drying device and sludge drying method

A sludge drying and equipment technology, applied in chemical instruments and methods, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. To solve the problem of high power consumption, to achieve the effect of simple and compact equipment structure

Active Publication Date: 2019-04-16
光大清洁技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current drying technology consumes a lot of energy, the drying equipment is complicated, the energy consumption is high, and a large amount of odor is generated during the drying process, which has potential safety hazards such as dust explosion.

Method used

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  • Sludge drying device and sludge drying method
  • Sludge drying device and sludge drying method
  • Sludge drying device and sludge drying method

Examples

Experimental program
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Embodiment Construction

[0041] figure 1 A preferred embodiment of a sludge drying plant 1 according to the invention is shown. The sludge drying equipment 1 includes a heat pump 2 , a gas regulating device 3 and a drying device 4 .

[0042] exist figure 1 In the preferred embodiment described above, the heat pump 2 is a carbon dioxide heat pump, and carbon dioxide circulates in the heat pump 2 as a refrigerant. The mode of operation of the heat pump is described as an example as follows. The carbon dioxide heat pump 2 includes an evaporator 21 , a compressor 22 , an air cooler 23 and a pressure reducing valve 24 . Process water at about 10-30° C. is fed into the evaporator 21 of the heat pump 2 . In the evaporator 21, the low-temperature and low-pressure two-phase carbon dioxide working medium absorbs the heat in the process water and becomes a low-temperature and low-pressure gas-phase carbon dioxide working medium, while the temperature of the process water in the evaporator 21 is reduced to 5-...

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PUM

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Abstract

The invention relates to a sludge drying device and a sludge drying method. The sludge drying device comprises a heat pump, a drying device and an air adjusting device, wherein process water from a wastewater treatment system is fed into the heat pump; sludge is fed into the drying device to be dried; the air adjusting device is connected to the drying device to form a closed system and used for air for drying the sludge to circularly flow in the closed system. Saturated evaporation moisture generated in the sludge drying process enters the air adjusting device from the drying device, the airadjusting device dehumidifies and dries the saturated evaporation moisture, the dehumidified and dried air is heated by the heat transferring medium which is discharged from an air cooler of the heatpump into hot air, and then the hot air is fed into the drying device to dry the sludge.

Description

technical field [0001] The invention relates to sludge drying equipment and a sludge drying method, which utilize process water of a sewage treatment system to dry sludge. Background technique [0002] With the acceleration of the urbanization process, while the urban sewage treatment capacity has been greatly improved, a large number of by-products - urban sludge are produced. If the sludge is not properly treated, it will cause environmental pollution. For example, the leachate produced by the sludge will Cause soil and groundwater pollution, foul-smelling gas and sludge particles emitted by sludge will cause air pollution, and will eventually cause harm to living organisms. Moreover, municipal sludge has high water content, large volume, and unstable properties, which are not conducive to transportation and treatment. [0003] On the other hand, municipal sludge itself contains a large amount of organic matter and lignin, and the calorific value after dehydration treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13
CPCC02F11/12C02F2303/10
Inventor 王婷婷孙浩
Owner 光大清洁技术股份有限公司
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