Dewatering process for using filtration aid in band filter

A technology of belt filter and belt filter press, which is applied in the direction of mobile filter element filter, filter separation, separation method, etc., can solve the problems of huge improvement investment and limited efficiency improvement, and achieve low consumption and filter aid The effect of less agent loss and enhanced fluidity

Inactive Publication Date: 2008-09-03
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

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] Refer to Figure 1 for the specific setting of the filter aid application device in this embodiment. The spray device is installed in the press filter part of the belt filter and is wrapped around the lower filter belt a outside the press rolls 1, 2, 5 and wrapped around the press roll 3. , 4. At the entrance of the press filter part formed by the upper filter belt b outside 4, the filter aid can be applied to the lower filter belt a or the upper filter belt b by adjusting the spraying direction of the spray head 6 of t...

Embodiment 2

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

[0022] Referring to Fig. 2, the sprinkler spray head 6 installed at the entrance of the filter part of the press sprays filter aid on the dehydrated material added on the lower filter belt a by the feeding device of the belt filter to increase the dehydration of the dehydrated material. Dehydration. 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] Referring to Figure 3, the filter aid applicator applies filter aid to the press roll surface. 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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PUM

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Abstract

The invention discloses a method for dehydrating filtration aid used by a belt filter to improve the dryness of dehydration material. The method for dehydrating the filtration aid is characterized in that the method comprises the process of applying the filtration aid, which refers to the operation that the filtration aid which has filtrating aid function is applied on the surface of a press roll, the surface of a filtration belt or the material to be dehydrated through a filtration aid applying device arranged at the inlet of the press and filtration part of the belt filter. The dehydration method overcomes the defects existing in the prior art, and has the advantages that the investment is economical, the control is convenient, the dehydration efficiency of the material can be effectively improved, the loss of the filtration aid is less, the used amount is small, the adjusting is easy, the response is fast, etc., thereby being applicable to the technical transformation of the belt filter.

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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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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