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System and process for deep dehydration of sludge by using ultrahigh pressure squeezer

A technology of deep dewatering and sludge dewatering, which is applied in water/sludge/sewage treatment, presses, sludge treatment, etc. It can solve the problem that it is difficult to reduce the moisture content of sludge to below 60%, increase the scale and quantity of main equipment, Problems such as low working efficiency of equipment, to achieve the effect of reasonable design of feeding structure, low cost and low conditioning cost

Active Publication Date: 2021-07-09
SHANGHAI TECHASE ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to use the membrane filter press for secondary deep dehydration on this basis, the sludge with a moisture content of 80% must be diluted back to sludge with a moisture content of 92-95% (5%-8% solid content) before operation. This obviously redundant design in the process chain causes huge waste of cost
Or remove all the original traditional dehydration equipment, and directly use the membrane filter press to dehydrate the thin sludge with a moisture content of 97-99% (1-3% concentration), but the working efficiency of this equipment is very low, and it needs to be doubled. The scale and quantity of the host device
In recent years, manufacturers of belt filter presses have developed high-pressure belt-type deep dehydrators, which can directly dehydrate materials with a moisture content of about 80% for a second time. However, because of the limited pressure of high-pressure bag filter presses, it is often necessary to invest Increase the cost of chemicals, especially the need to add lime, plant ash and other powders to improve the dewatering performance of sludge. Under the above conditions, it is also difficult to reduce the moisture content of sludge to below 60%.

Method used

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  • System and process for deep dehydration of sludge by using ultrahigh pressure squeezer
  • System and process for deep dehydration of sludge by using ultrahigh pressure squeezer
  • System and process for deep dehydration of sludge by using ultrahigh pressure squeezer

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Embodiment 1

[0042] Such as Figure 1-Figure 8 As shown, the present invention is a treatment system for deep dehydration of sludge using an ultra-high pressure press, including a sludge tank 1, a first-stage sludge dewatering equipment 2, a sludge conditioning device 3, and a dry sludge conveying device 4 connected in sequence (dried mud feed pump), ultra-high pressure press 5 and the discharge mud conveying device 6, also include the quantitative dosing device 7 that is connected with the feed inlet of sludge conditioning device 3; A feed port 10 is provided on the side, that is, the feed end, and a back-blowing return pipeline 12 is provided above the feed port 10; The blowback port 11 is equipped with a full material test sensor 8 and a switch valve 9; the full material test sensor 8 is connected to the signal input end of the PLC control system, and the switch valve 9 is connected to the signal output end of the PLC control system; the sludge conditioning device 3 is selected Twin-sc...

Embodiment 2

[0054] Such as figure 1 As shown, the present invention is a treatment system for deep dehydration of sludge using an ultra-high pressure press, including a sludge tank 1, a first-stage sludge dewatering equipment 2, a sludge conditioning device 3, and a dry sludge conveying device 4 connected in sequence (dried mud feed pump), ultra-high pressure press 5 and the discharge mud conveying device 6, also include the quantitative dosing device 7 that is connected with the feed inlet of sludge conditioning device 3; The side, that is, the feed end is provided with a feed port 10, and the other side of the ultra-high pressure press 5 is provided with another feed port away from the feed end, and both feed ports are connected to the dry mud conveying device 4 (dry Mud feed pump) outlet connection; the blowback port of the ultra-high pressure press 5 is located in the middle of the ultra-high pressure press 5; the blowback port of the ultra-high pressure press 5 is provided with a ful...

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Abstract

The invention discloses a system and process for deep dehydration of sludge by using an ultrahigh pressure squeezer. The system comprises a sludge tank, primary sludge dewatering equipment, a sludge conditioning device, a dry sludge conveying device, an ultrahigh pressure squeezer and a blanking and sludge discharging conveying device which are connected in sequence, and further comprises a quantitative dosing device connected with the sludge conditioning device, wherein a feeding port is formed in one side, namely, a feeding end, of the ultrahigh-pressure squeezer; a full material test sensor and a switch valve are arranged on the other side of the ultrahigh pressure squeezer, namely, a top back flushing opening far away from the feeding end; the full material test sensor is connected with the signal input end of a PLC control system, and the switch valve is connected with the signal output end of the PLC control system; and the sludge conditioning device adopts a double-screw stirrer. The system can solve the problem of deep dehydration of the sludge with the moisture content of about 80%, can reduce the moisture content of the municipal sludge to 50% or below on the premise of low cost, and is convenient for harmless, reduction, stabilization and resourceful treatment of the municipal sludge.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and relates to a system and a process for deep dehydrating sludge by using an ultra-high pressure press, in particular to a system and a process for treating stock sludge by using a new ultra-high pressure press. The stock sludge mentioned here mainly refers to the sludge (water content is usually 75%-85%) after one-time dehydration with conventional dehydration equipment. The source of sludge is usually but not limited to municipal sewage treatment plants, water plants and various industrial and mining enterprises. Produced sludge with high organic matter content. Background technique [0002] Sludge mainly refers to the solid-liquid phase mixture produced in the process of sewage treatment and water supply treatment, which is an inevitable by-product of sewage treatment. The composition and properties of sludge produced by different sewage and treatment processes are also different. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/122C02F11/123C02F11/125C02F11/127C02F11/14B30B9/06B30B15/30C02F103/10C02F103/34
CPCC02F11/122C02F11/123C02F11/125C02F11/127C02F11/14B30B9/06B30B9/047B30B15/30C02F2103/10C02F2103/34
Inventor 刘道广刘宏健胡军驰孙刚范王亚俊杨红烈
Owner SHANGHAI TECHASE ENVIRONMENT PROTECTION
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