Dewatering process for using filtration aid in band filter

A belt filter, belt filter press technology, applied in the direction of mobile filter element filter, filtration separation, separation method, etc., can solve the problems of huge improvement investment and limited efficiency improvement, and achieve less dosage, filter aid and other problems. The effect of less agent loss and improvement of pressing dryness

Inactive Publication Date: 2009-12-16
ZHEJIANG HUAZHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of mechanical design from the aspect of improving the external conditions of pressing and dehydration of the belt filter is a huge investment, and the efficiency improvement is limited.

Method used

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  • Dewatering process for using filtration aid in band filter
  • Dewatering process for using filtration aid in band filter
  • Dewatering process for using filtration aid in band filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The dehydration method using a filter aid in a belt filter includes a filter aid application process, and a filter aid is applied to the surface of the filter belt through a filter aid application device arranged at the entrance of the press filter part of the belt filter. of filter aids. Examples The filter aid is selected from liquid surfactants of hydrocarbons and AEO; the device for applying the filter aid is a spray device with a spray head.

[0018] For the specific setting of the filter aid application device in this embodiment, see figure 1 , the spray device is installed in the press filter part of the belt filter, which is composed of the lower filter belt a wrapped around the press rolls 1, 2 and 5 and the upper filter belt b wrapped around the press rolls 3 and 4 at the entrance of the press filter part By adjusting the spray direction of the spray head 6 of the spray device, the filter aid can be applied to the lower filter belt a or the upper filter belt ...

Embodiment 2

[0021] In this embodiment, the filter aid is directly applied to the material to be dehydrated.

[0022] see figure 2 , the sprinkler sprinkler head 6 installed at the entrance of the press filter part sprays filter aid on the dehydrated material added on the lower filter belt a by the belt filter feeding device to increase the dehydration of the dehydrated material. Other methods of this embodiment are the same as embodiment 1.

[0023] The filter aid can also be applied in advance before the dehydrated material is loaded into the feeding device, and directly mixed in the dehydrated material.

Embodiment 3

[0025] see image 3 , the filter aid applying device applies the filter aid to the surface of the press roll. The belt filter of the present embodiment has no upper filter belt, the lower filter belt a is wrapped around the press rolls 1, 2, 5, the press rolls 3, 4 are pressed on the lower filter belt a, and the spray head 6 of the spray device is inclined The ground spraying filter aid is at the entrance of the dehydrated material composed of the press roll 3 and the lower filter belt a. Since there is no upper filter belt, most of the filter aid is sprayed on the surface of the press roll 3, so that the filter aid and The dehydrated material is fully contacted to enhance the effect of applying filter aid. Other methods of this embodiment are the same as embodiment 1.

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Abstract

The invention discloses a dehydration method using a filter aid in a belt filter for improving the dryness of dehydrated materials. The dehydration method using a filter aid is characterized in that: it includes a filter aid application process, and the filter aid application process is to apply a filter aid to the filter aid application device arranged at the entrance of the press filter part of the belt filter. The dewatered material or the surface of the filter belt or the surface of the press roll is applied with a filter aid that can aid in filtration. The invention overcomes the defects existing in the prior art, and has the advantages of economical investment, convenient control, effective improvement of material dehydration efficiency, less loss of filter aid, less dosage, easy adjustment, quick response, etc., and is especially suitable for the belt filter. Technological transformation.

Description

technical field [0001] The invention relates to a solid-liquid separation method, in particular to a dehydration method using a filter aid in a belt filter for improving the dryness of dehydrated materials. Background technique [0002] The dehydration process of the belt filter is to press the filter to dewater through the press roller. The filter dehydration is the key step for the belt filter to complete the material dehydration. The efficiency of the filter dehydration directly determines the material dehydration dryness of the belt filter. As well as production and dehydration costs. In order to improve the dehydration efficiency of the belt filter, the prior art generally adopts to improve the external dehydration conditions of the filter press dehydration, that is, technically improve the mechanical design of the press part of the filter. The inventor of the present invention discloses a mechanical design technology in which the steel rope belt provides high tension ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D37/02B01D33/04B01D33/044
Inventor 唐志超李小整毛怡红
Owner ZHEJIANG HUAZHANG TECH
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