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Toothed pressure-maintaining filter-pressing method and equipment

A tooth-like and equipment technology, applied in the field of press filtration solid-liquid separation equipment, can solve the problems of unstable air pressure control, long water filtering time, insufficient efficiency, etc., to avoid instability, stabilize the dehydration process, and improve the dehydration effect. Effect

Active Publication Date: 2016-05-11
福建省创绿机械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the plate and frame filter press is commonly used in the field of sludge dewatering. The traditional plate and frame filter press includes a hydraulic device and a filter press device. The filter press device includes multiple groups of end-to-end filter plates. The feed hole and the material cavity, the feed hole communicates with the material cavity, when in use, the material is pumped from the feed hole into the material cavity by the feed pump and filled, and the limited space in the material cavity is used with a small pressure. The material is dehydrated, and the hydraulic device is mainly used to limit the filter plate of the filter plate in the filter press, prevent the filter plate from loosening, and play a role in maintaining pressure. The material filtered by this filter press has no water filtration effect. Not very ideal, the air pressure control of pressing is unstable, the water content can rarely be reduced to 50% after pressing, and the water filtration time is long, and the efficiency is not high enough

Method used

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  • Toothed pressure-maintaining filter-pressing method and equipment
  • Toothed pressure-maintaining filter-pressing method and equipment
  • Toothed pressure-maintaining filter-pressing method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1—a kind of dentate pressure maintaining pressure filtration method, comprises the following steps:

[0051] (1) Start the hydraulic device, and push the plate to press and seal the filter plate;

[0052] (2) The hydraulic cylinder maintains pressure, the pressure is 13kg, and the push plate is fixed;

[0053] (3) The material pump pumps the material to be press-filtered into the press-filter space through the material channel, and the pressure of the hydraulic cylinder is raised to 60kg, and the pressure is maintained;

[0054] (4) Under the power of the material pump, the material in the filter press space is squeezed once, and the pressure of the hydraulic cylinder is raised to 100kg;

[0055] (5) The push plate continues to move forward, and after the filter press plate is stressed, the segmented tooth-shaped secondary pressing is performed again, and the pressure value variation range of the hydraulic cylinder is divided into 3 segments, and the pressur...

Embodiment 3

[0064] Embodiment 3—a kind of dentate pressure maintaining pressure filtration method, comprises the following steps:

[0065] (1) Start the hydraulic device, and push the plate to press and seal the filter plate;

[0066] (2) The hydraulic cylinder maintains pressure, the pressure is 15kg, and the push plate is fixed;

[0067] (3) The material pump pumps the material to be filtered into the filter press space through the material channel, and the pressure of the hydraulic cylinder is raised to 80kg, and the pressure is maintained;

[0068] (4) Under the power of the material pump, the material in the filter press space is squeezed, and the pressure of the hydraulic cylinder is raised to 120kg;

[0069] (5) The push plate continues to move forward. After the filter press plate is stressed, the segmented tooth-shaped secondary pressing is performed again, and the pressure value variation range of the hydraulic cylinder is divided into 4 segments. The pressure value in each seg...

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Abstract

The invention relates to a toothed pressure-maintaining filter-pressing method and equipment. The toothed pressure-maintaining filter-pressing method comprises a prepressing process, a feeding process, a primary squeezing process and a secondary squeezing process, the secondary squeezing process is a segmented toothed squeeze dewatering process, a hydraulic cylinder is driven to act so that pressure values in all segments are increased gradually, when the squeezing pressure value reaches a first set pressure value, the hydraulic cylinder is driven to act to reduce the squeezing value to a second set pressure value, and operation of the next segment is executed. According to the toothed pressure-maintaining filter-pressing method and equipment thereof, pressure of the hydraulic cylinder can be in a steadily increased state, instability of pressure of the hydraulic cylinder is avoided, a material and a filter-pressing plate are transiently buffered when being squeezed, the filter-pressing plate is protected to a certain degree, the material dewatering effect is greatly improved, the dewatering process is stable, dewatering efficiency is high, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of filter press solid-liquid separation equipment, in particular to a tooth-shaped pressure-holding filter press method and equipment. Background technique [0002] Filter press is a kind of equipment that separates materials from solid and liquid through pressure filtration. It is widely used in food, chemical, environmental protection and sewage treatment industries, especially for the separation of sticky and fine matter. It has unique advantages. For example, the sludge produced by chemical and domestic sewage treatment has a high water content and must be dehydrated to reduce its volume before it can be discharged. After dehydration treatment, the volume will be reduced by more than 50%, and the energy consumption will be reduced, which can significantly reduce the cost of sludge treatment in enterprises and reduce landfill sites. [0003] Traditional filter presses are classified according to the filt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D25/21
CPCB01D25/21B01D2201/08B01D2201/202
Inventor 庞仲达
Owner 福建省创绿机械股份有限公司
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