Sludge freezing dehydration device and sludge dehydration method

A freeze dehydration and sludge technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of high energy consumption, poor stability, and low safety of sludge dehydration, and achieve Low odor volatilization rate, good effect and energy saving effect

Pending Publication Date: 2021-01-01
苏州市相城环保技术有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency, energy-saving, stable and safe sludge freezing and dehydration device and sludge dehydration method to overcome the problems of high energy consumption, low safety and poor stability of sludge dehydration in the prior art

Method used

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  • Sludge freezing dehydration device and sludge dehydration method
  • Sludge freezing dehydration device and sludge dehydration method
  • Sludge freezing dehydration device and sludge dehydration method

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] see figure 1 A kind of sludge freezing dehydration device shown, comprises feeding device 1, freezing treatment device and screw extrusion filter 4, wherein, feeding device 1 specifically comprises screw pump 11 and the granulator 12 that is connected at its rear end, The freezing treatment device includes a freezer 2 and a crushing device 3, and the crushing device 3 includes a crusher 31 and a sludge conveyor 32 connected to the rear end thereof.

[0030] The freezer 2 has a freeze feed inlet 21 connected to the granulator 12 and a freeze discharge outlet 22 connected to the screw extrusion filter 4. In the present embodiment, the freezer 2 is provided with three freeze transfer belts 23, along the dirt Mud transmission direction is successively the first conveyor belt 231, the second conveyor belt 232 and t...

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Abstract

The invention aims to provide a safe, energy-saving, efficient and stable sludge freezing dehydration device and a sludge dehydration method. The sludge freezing dehydration device comprises a feedingdevice, a freezing treatment device and a spiral extrusion filter, the freezing treatment device comprises a refrigerator and a crushing device, the spiral extrusion filter comprises a sludge conveying channel, and the sludge conveying channel sequentially comprises a crushing treatment section, a heating treatment section and a filtering treatment section from back to front along a sludge conveying path. According to the sludge freezing dehydration device and the sludge dehydration method, the sludge is frozen and crushed through the freezing treatment device, the cell structure of microorganisms in the sludge is destroyed, water in cells is separated out, the frozen sludge is melted through the screw extrusion filter, then solid-liquid separation is conducted, and the dehydrated sludgewith the low water content is obtained.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge freezing and dehydration device and a sludge dehydration method. Background technique [0002] The activated sludge method or the improved process based on it is the most commonly used sewage treatment process in my country at present. In these processes, a considerable part of the pollutants in the sewage will be transferred to the activated sludge. In addition, because my country's industrial sewage and domestic sewage are often mixed together for treatment, there are still a large amount of toxic and harmful substances such as heavy metals in activated sludge. In order to prevent secondary pollution caused by sludge and ensure the normal operation of sewage treatment plants and the effect of sewage treatment, it is necessary to properly treat sludge. [0003] The moisture content of the sludge produced by the sewage plant is generally about 80%. At present, the common...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/20C02F11/12C02F11/125
CPCC02F11/12C02F11/125C02F11/20
Inventor 秦艳涛徐峰李守栋王国红
Owner 苏州市相城环保技术有限公司
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