Method and apparatus for improving sludge dehydration

A dehydration and sludge technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of complex conditioning process, high equipment requirements, and large consumption of chemicals, so as to increase permeability and improve work efficiency , activity and solubility enhancement effects

Inactive Publication Date: 2008-12-24
上海滨浦水处理设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Conventional physical or chemical methods of sludge conditioning, such as heating and freezing, are complex conditioning processes, require high equipment, and consume a lot of energy; chemical and biological flocculation conditioning requires a large amount of chemicals to be added The problem
Therefore, the cost of conditioning and tempering by conventional methods accounts for a large part of the sludge treatment cost, and the cost is relatively high.

Method used

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  • Method and apparatus for improving sludge dehydration
  • Method and apparatus for improving sludge dehydration
  • Method and apparatus for improving sludge dehydration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] according to figure 2 The process flow chart shown in the sewage treatment plant sludge, using image 3 and Figure 4 The shown built-in electromagnetic stirring wing sludge conditioning machine performs sludge conditioning. image 3 and Figure 4 Description of the numbers in:

[0039] 1 On-line flowmeter 2 Sludge pipe 3 Motor 4 Bracket

[0040] 5 Electromagnetic mixing wing 6 Drive shaft 7 Embedded electromagnetic mixing wing sludge conditioning machine

[0041] 8 flange 9 fixed magnet 10 mixing wing 11 serrated wing

[0042] The structure of the built-in electromagnetic stirring wing sludge conditioning machine mainly includes two layers inside and outside. The outer layer is equipped with four fixed magnets 9 arranged at intervals of four equal intervals. The diameter of the inner layer is equivalent to that of the sludge pipeline 2. The inner layer is provided with power-driven rotating electromagnetic stirring blades 5, which are at least 16 equally spaced ...

Embodiment 2

[0046] according to figure 2 The process flow chart shown in the sewage treatment plant sludge, using image 3 and Figure 4 The shown built-in electromagnetic stirring wing sludge conditioning machine performs sludge conditioning.

[0047] The control test of the final conditioner: the sludge from the sewage treatment plant has a water content of 98% after being concentrated in the concentration tank for 12 hours, and the volatile solid content accounts for 45% of the solid content. The sludge enters the sludge pump and is pumped out , the flow rate is 240m 3 / h, head H=11.9m, pump outlet flow rate reaches 4.5m / s. The dosing device supplies polyacrylamide, the dosage is 0.1% of the dry basis of the sludge, mixed with the sludge in the pipeline, and then directly enters the plate and frame filter press for dehydration, the working pressure is 15 kg, and the dewatered sludge (mud cake ) has a moisture content of 82%.

[0048] The test of the present invention loaded into ...

Embodiment 3

[0050] according to figure 2 The process flow chart shown in the sewage treatment plant sludge, using image 3 and Figure 4 The shown built-in electromagnetic stirring wing sludge conditioning machine performs sludge conditioning.

[0051] Control test without conditioning machine: The sludge from the sewage treatment plant has a water content of 98% after being concentrated for 1.5 hours in a thickening tank, and the sludge with a volatile solid content of 77% of the solid content enters the sludge pump and pumps it out , the flow rate is 400m 3 / h, head H=8.6m, pump outlet flow rate reaches 3m / s. The dosing device supplies polyaluminum ferric chloride, the dosage is 2% of the dry basis of the sludge, mixed with the sludge in the pipeline, and then directly enters the rolling belt filter press for dehydration, and the grid rotates 2 revolutions per minute , The moisture content of the dewatered sludge (mud cake) is 86%.

[0052] The test of the present invention loaded...

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Abstract

The invention discloses a method for improving the dehydrating property of the sludge and equipment thereof. The method is to adopt an inner embedded type electromagnetic swirling wing sludge conditioner arranged in the sludge pipe or an external magnet-rotary sludge conditioner arranged on the sludge pipe to quench and temper the sludge, so as to achieve the purpose of sludge specific resistance reduction and sludge dehydrating property improvement. After the method and the equipment are implemented, the water content of the final dewatered sludge (mud cake) can reach 70-80% which reduces by 2-15% comparing to the technology without conditioner treatment. The work efficiency of the dewaterer is greatly improved, the energy consumption of the dewaterer is reduced by 5-40% and the reagent dosing is reduced by 5-100%. The method and equipment of the invention are not only suitable for the transformation of the old equipment in the prior sludge treatment, but also suitable for the establishment of the new equipment.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a method for improving sludge dehydration and a dynamic sludge physical conditioner device used therein. Background technique [0002] With the rapid development of my country's economy, the discharge of urban industrial wastewater and domestic sewage is increasing day by day. Sewage sludge is a solid waste produced in the process of sewage treatment. It has a huge amount of production and complex components. How to reduce it after scientific treatment , Harmless, resourceful and stable, has become a research topic that is widely concerned by the environmental circles in our country and even in the world. [0003] Due to different urban sewage treatment methods, there are many kinds of sludge formed, including primary sludge, humic sludge, residual activated sludge or digested sludge. The water content in the sludge is very high, generally 99.2-99.8%. The form of water contained in s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14
Inventor 顾明发邢辉秦文明尹小平郭晨华
Owner 上海滨浦水处理设备有限公司
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