Method and equipment for dewatering municipal sludge with high dryness

A municipal sludge and sludge technology, which is applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. Dry dehydration and other problems, to achieve the effect of improving sludge conditioning efficiency, conducive to sustainable development and reducing site area

Inactive Publication Date: 2016-07-20
王树岩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most effective method of sludge modification is chemical modification, and the most classic, economical and effective modifiers are ferric chloride and lime; usually the dosage of ferric chloride and lime is 1/2 of the dry weight of sludge 15-50%, when ferric chloride is used as the conditioner, the chloride ion content in the water contained in the dewatered ca

Method used

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  • Method and equipment for dewatering municipal sludge with high dryness
  • Method and equipment for dewatering municipal sludge with high dryness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a kind of municipal sludge high-dry dehydration equipment of the present invention includes: sludge conditioner 1, filter press feed pump 3, high-pressure diaphragm plate frame filter press 4, belt conveyor 5, sludge inlet pipe 6 , squeeze water tank 7 and squeeze water pump 8, the sludge conditioner 1 is equipped with a mixing device 2, the sludge inlet pipe 6 is set on the top of the sludge conditioner 1, and the bottom of the sludge conditioner 1 passes through the feed pump of the filter press 3 is connected to the high-pressure diaphragm plate-frame filter press 4, the squeeze water tank 7 is connected to the high-pressure diaphragm plate-frame filter press 4 through the squeeze water pump 8, and the belt conveyor 5 is located below the high-pressure diaphragm plate-frame filter press 4.

[0033] The high-dry dehydration method of municipal sludge includes the following steps:

[0034] (1) A municipal sewage treatment plant produces 7,80...

Embodiment 2

[0038] The municipal sludge high-dry dehydration equipment used is the same as that of Example 1;

[0039] The high-dry dehydration method of municipal sludge includes the following steps:

[0040] (1) A municipal sewage treatment plant produces 700 tons of sludge with a moisture content of 80% every day. This sludge to be dehydrated is pumped into the sludge conditioning machine 1 through the sludge inlet pipe 6. Add a certain amount of ferric sulfate aqueous solution in the conditioning machine 1, the mass fraction of ferric sulfate in the ferric sulfate aqueous solution is 10%, the dosage converted into ferric sulfate is 4.6% of the dry weight of the sludge to be dewatered, and a certain amount of ferric sulfate is added at the same time Dilute with water so that the solid content of the sludge to be dehydrated is 8%, turn on the mixing and stirring device 2 of the sludge conditioner 1, mix and stir for 40 minutes, and then add an appropriate amount of quicklime with a fine...

Embodiment 3

[0044] A kind of municipal sludge high-dry dehydration equipment of the present invention, such as figure 2 As shown, it includes: first-level sludge conditioning machine 11, second-level sludge conditioning machine 12, conditioning sludge storage tank 13, filter press feed pump 3, high-pressure diaphragm plate and frame filter press 4, belt conveyor 5, Sludge inlet pipe 6, squeeze water tank 7 and squeeze water pump 8, primary sludge conditioner 11 is equipped with primary mixing and stirring device 21, and secondary sludge conditioning machine 12 is equipped with secondary mixing and stirring device 22, conditioning sewage The mud storage tank 13 is equipped with a storage tank mixing and stirring device 23, and the sludge inlet pipe 6 is arranged on the top of the first-level sludge conditioner 11, and the upper part of the first-level sludge conditioner 11 is connected with the upper part of the second-level sludge conditioner 12. The upper part of the first-grade sludge ...

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Abstract

The invention relates to a method and equipment for dewatering municipal sludge with high dryness. The method comprises the following steps: putting to-be-treated sludge in a sludge treatment machine, and mixing and stirring with ferric sulfate or polymerized ferric sulfate; adding quick lime, and keeping on mixing and stirring to obtain treated sludge having neutral pH; and starting a feed pump of a filter press, pumping the treated sludge in the high-pressure diaphragm frame filter press, squeezing to obtain dewatered sludge cake, opening a filter plate, and delivering the dewatered sludge cake on a belt conveyer to the outside. The equipment comprises the sludge treatment machine, a sludge inlet pipe, the feed pump of the filter press, the high-pressure diaphragm frame filter press, a squeezing water pump, a squeezing water tank and the belt conveyor. According to the method, the dewatered sludge cake has a water content of less than 60 percent, has good ventilation after being ground, is suitable for growth and reproduction of microorganisms, can be directly subjected to aerobic fermentation, can be used for directly realizing reduction, harmlessness and resource of sludge, and is beneficial to sustained development.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and relates to a high-dry dehydration method and equipment for municipal sludge. Background technique [0002] A large amount of sludge is produced in the process of municipal and industrial sewage treatment, most of which are directly used for agriculture without pretreatment or after simple treatment, and some are even piled up randomly. Pathogens in sludge pose potential threats to human health, and heavy metals and toxic and harmful organic substances pollute the surface Water and groundwater systems, the odor emitted by sludge pollutes the air, takes up a lot of land, has poor stability, and brings great harm to the environment. At present, the disposal methods of municipal sludge include aerobic composting, landfill, incineration, throwing into the sea, and making construction materials. [0003] Municipal sludge contains a large amount of organic matter, nitrogen and phosphorus a...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/14
CPCC02F11/122C02F11/14
Inventor 王树岩
Owner 王树岩
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