Dezhou Zhengda International Trade Co.,Ltd.
Address:No.587,Jinghua Rd, Economic Development Zone of Dezhou
Website: Http://www.dzzhengda.com
Tel: (86)-534-2361066
Fax: (86)-534-2392966
Email: zhengda@dzzhengda.com
Beijing office:
Room 506,19F,Hongkunlixiangcheng , Daxing District,Beijing
Tel: (86)010- 80251798
FAX: (86)010- 80251798
When we choose the filter cloth for filter press ,we need according to our request and the nature of the filtering material, namely material stripping, Chemical properties ,physical properties;the filtered cake dry and so on, let's one by one .
In the first, The most important thing is to consider the nature of the filtering material, its importance factors accounted for more than 75% in the selection of filter cloth.
A, Stripping performance of residue will be directly affects the working efficiency of the filter press .If the residue is smooth surface and no adhesive type, the filtrate will quickly passing out from the filter cloth. Filtering time is short and have high efficiency. On the contrary, if the residue is adhesive, the filtering time will change much longer. The efficiency of course will reduce accordingly. And the more the adhesive is strength, the lower the efficiency is.Then we will choose monofilament filter cloth or satin woven filter cloth.
B, According to the chemical characteristics of filtrate like acid and alkali to choose. According different degree of acid and alkali to choose suitable types of filter cloth.Resistance to most acidic is polyester filter cloth. Resistance to most alkaline is whalen filter cloth. Both resistance to most acidic and alkaline is polypropylene filter cloth.
C, The shape of the filter residue.We consider the wear resistance of the filter cloth according whether the particles of filter residue is evenly and the shape is hard. If the filter residue have vary in size and corer angle , we will according to different degree of choice to choose. The best wear-resisting property is from Polyester filter cloth and nylon filter cloth
D,The temperature of the filtrate. The temperature of filtrate will influence the work efficiency of filter cloth. The highest temperature resistance is from Polyester filter cloth.
The second,we have my own request. We need that the high efficiency of the filter press and get the dry filter residue. About the regenerability of the filter cloth,we also notice choose the filter cloth have the good regenerability . The filter cloth of good regenerability can be directly washing the filter cloth on the filter machine and reduce the time of change filter cloth. The filtration efficiency of filter cloth which have been changed will restore more than 80% filtration efficiency after a simple processing.
Below is a list of four kinds of commonly used filter cloth properties
Properties |
POLYESTER FILTER CLOTH |
Nylon filter cloth |
POLYPROPYLENE FILTER CLOTH |
Whalen filter cloth |
acid resistance |
best |
Worse |
well |
no |
alkali resistance |
耐弱碱 |
well |
best |
耐强碱 |
electrical conductivity |
很差 |
better |
wel |
一般 |
bursting elongation |
30%-40% |
18%-45% |
大与涤纶 |
12%-25% |
resilience |
10% |
>90% |
>10% |
worse |
Wear Resistance |
best |
best |
好 |
better |
Operating Temperature: |
170 °C |
130 °C |
90 °C |
100 °C |
Softening point |
230 -240 °C |
180 °C |
140 -150 °C |
200 °C |
melting point |
255 -265 °C |
210-215 °C |
165 -170 °C |
220 °C |