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Method for cleaning and regenerating filter belt

A filter belt and filter part technology, applied in the field of cleaning, can solve the problems such as the decrease of the air permeability of the filter belt, the influence of the dehydration efficiency of the filter belt, the inability to clean the filter belt or the polyester mesh, etc., and achieve the reduction of waste water discharge and good dehydration effect. , the effect of good environmental benefits

Inactive Publication Date: 2008-11-12
ZHEJIANG HUAZHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the adoption of the technology of belt filter press to provide high tension through the tension belt to increase the press dewatering pressure in order to improve the sludge dryness, the press dewatering pressure is as high as 3.0MPa, and the sludge dryness after press dehydration treatment reaches 30-50 %, the fine particles of sludge dewatered under high tension state will drill into the inner layer of the filter belt, firmly adsorbed on the filter belt, or embedded in the inner layer of polyester net, dehydration treatment of viscous active sewage The same is true for mud. Viscous fine sludge particles are tightly embedded in the inner layer of the filter belt. The existing water washing technology cannot clean the filter belt or polyester net, and cannot be effectively regenerated, so that the air permeability of the filter belt is greatly reduced. , which seriously affects the dehydration efficiency of the filter belt

Method used

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  • Method for cleaning and regenerating filter belt
  • Method for cleaning and regenerating filter belt
  • Method for cleaning and regenerating filter belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The cleaning and regenerating method of the filter belt is a vacuum cleaning and regenerating method, comprising a water spray cleaning step and a vacuum suction cleaning step, wherein the water spray cleaning is performed first, and then the vacuum suction cleaning is performed. The water spray cleaning step is to carry out water spray cleaning to the filter belt through the water spray device 1, and the water spray device 1 is arranged at the discharge port B of the press filter part of the belt filter press; the vacuum suction cleaning step The vacuum suction device 2 is used to carry out vacuum suction cleaning on the filter belt. The vacuum suction device 2 is installed at the discharge port B of the press filter part of the belt filter press, and the water spray device 1 is installed on the vacuum suction Device 2 front. In this cleaning and regeneration method, before vacuum suction cleaning, the filter belt is pre-cleaned with water spray, so that there is suffi...

Embodiment 2

[0019] The water spray cleaning step of the filter belt cleaning and regeneration method adopts the method of double-sided spraying, and the cleaning water is sprayed on both sides of the lower filter belt a; the vacuum degree of the vacuum suction device 2 is 0.025MPa. see figure 2 , the water spraying device 1 of the present embodiment uses two groups of shower nozzles, and water is installed on and below the lower filter belt a after the two filter belts are separated after the discharge port B of the press filter part of the belt filter press is discharged. The shower head of the shower device 1, the water shower device 1 is installed in the front of the vacuum suction device 2. When in use, the cleaning water in the water spray cleaning step sprays the upper and lower sides of the lower filter belt a.

[0020] The other steps and the device used in the cleaning and regeneration method of this embodiment are the same as those in Embodiment 1.

[0021] Spraying on both s...

Embodiment 3

[0024] The vacuum suction device 2 used in the vacuum suction cleaning step of the filter belt cleaning regeneration method is mainly composed of a vacuum pump, a valve and a vacuum suction roller 23, and the vacuum degree of the vacuum suction device 2 is 0.04MPa. see image 3 , The vacuum suction roller 23 is installed close to the lower filter belt a. After the lower filter belt a is unloaded at the outlet B of the press filter part, after being sprayed by two groups of nozzles of the water spray device 1, it enters the position corresponding to the vacuum suction roller 23 for vacuum suction cleaning. Vacuum suction roller 23 is commonly used known product, and its roller surface has the suction hole of leading vacuum pump.

[0025] The other steps of the cleaning and regeneration method in this embodiment and the devices used are the same as those in Embodiment 2.

[0026] This embodiment is used for cleaning regeneration air permeability is 50 liters / meter 2 ·The filt...

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Abstract

The invention discloses a regeneration method for cleaning filtrating belt which adopts a vacuum cleaning regeneration filtrating belt method, the method includes cleaning steps of water spray cleaning and steps of vacuum draw suction cleaning, the steps of water spray cleaning is performed firstly, after that the vacuum draw cleaning is performed, the step of water spray cleaning is performed by a water sprayer after discharging at the discharge port of the squeezing filtrating part of the belt type press filter, the step of vacuum suction cleaning is performed by a vacuum suction device after discharging at the discharge port of the squeezing filtrating part of the belt type press filter, and the water sprayer is mounted behead in front of the vacuum draw device. The invention overcomes the existing defects of the present technology, and has advantages of convenient manipulation and good cleaning effect, and especially is suitable for processing activated sludge with stronger stick force and cleaning the band press filter filtrating belt operating in high-tension, and the regeneration rate of the filtrating belt can be more than 60% after the filtrating belt is cleaned.

Description

technical field [0001] The invention relates to a cleaning method, in particular to a filter belt cleaning and regeneration method suitable for cleaning the filter belt of a belt filter press operating under high tension and the filter belt and polyester net for dehydration treatment of viscous sludge. Background technique [0002] In the prior art, the cleaning and regeneration of the filter belt of the belt filter press generally uses water with a pressure of about 0.5 MPa to wash the front and back sides of the filter belt to clean the sludge remaining on the filter belt, so that the filter belt can maintain the air permeability necessary for pressing and dehydration . This cleaning method is only suitable for cleaning the belt filter press running at low tension and the filter belt with less viscous dewatering sludge, because the fine sludge particles will not be compressed when dewatering under low working tension. Into the inner layer of the filter belt, and the dehyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D33/48B01D33/04
Inventor 唐志超李小整胡杭滨余真德毛怡红
Owner ZHEJIANG HUAZHANG TECH
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