Filtering Principle
Candle filter is also called filter cake layer filter, it is composed of the vertical vessel and vertically installed filter units. The filter units consist of poriterous petaloid filter cartridge and filter cloth. The real filter medium are the filter cloth and filter cake layers that covering the filter cartridge. Filter cloth is fixed on the surface of filter cartridge to make it fully sealed by using special clamps. The entire filter process is totally sealed without any spillage or environment pollution. It can realize automatic filtration, feeding washing & air drying, and air back blowing to discharge residuals at one time. The filter process is in high speed and zero pollution, it brings largest economic benefit.
Remark
• Max capacity is the reference value base on water test; the actual value can be different because of liquid viscosity, solid content and pressure difference
• The material can be carbon steel, SUS304 and SUS316L According to the nature and temperature of the material filtered, the O-Ring'smaterial can be customized to meet your needs
Main Structure & Working Principle
Candle filter is a fully closed filter system. Its main parts are the material tank, air storage tank, feeding pump, candle filter, pipes, valves, PLC electric control system.
While filtering, filter material will be sent into the filtering housing by feed pump first; when it passes through filter cloth, solid particles will be stopped on the filter cloth. And as the solid particles growing, they will become filter cakes. The holes between solid particles are very small, so they can keep more solid particles, thus get clear liquid. Before solid particles becoming cakes, the filtration will be sent back to filter material tank and resend to vessel again. When filter cakes are formed (and reaches required requirement), PLC will send a signal to stop the circulation, and the clear liquid will pass the filter valve and go to next process to start the normal filtering process.
After certain time normal filtering, the cake thickness is increasing to high level, the filtering speed is slow down, filtering efficiency is decreased, and the filter pressure is >0.5MPa, then the pressure sensor will send a signal to PLC to stop feed pump, close feed valve and open forward blowing valve to remove the filtrate in vessel. When the liquid level in vessel is lower than filter cartridge, PL wil open drain valve to discharge filtrate, the pressure will drop swiftly. When PLC received low pressure signal, it will close forward blowing valve and open back blowing valve (compressed air, nitrogen or steam) to back blow until cakes fall down. Stop blowing after 30 seconds, and open cake discharging outlet to discharge cakes. When cakes are discharged, close the cake discharging outlet to finish the filtering cycle. The candle filter will be ready for next cycle.
Model |
Cartridge
QTY |
Cartridae Size(mm) |
Filtering
Area(m2) |
Capacity(t/h) |
Housing
Volume(L) |
Inlet(DN) |
Cake Discharging
Outlet(DN) |
(mm
Housing
Diameter(mm) |
Tota
Heiaht(mm) |
Heiaht
of Housing(mm) |
Height of Waste
Dischargina Oulet(mm) |
Dimension(mm) |
| DZZS-1 |
7 |
90*500 |
1 |
2.2 |
140 |
25 |
150 |
456*3 |
1902 |
1448 |
500 |
C1000 |
| DZZS-1.5 |
10 |
90*500 |
1.5 |
3.3 |
180 |
25 |
200 |
508*4 |
1928 |
1474 |
500 |
C1000 |
| DZZS-2 |
7 |
90*1000 |
2 |
4.4 |
220 |
32 |
150 |
456*3 |
2402 |
1948 |
500 |
C1200 |
| DZZS-3 |
10 |
90*1000 |
3 |
6.6 |
280 |
40 |
200 |
508*4 |
2428 |
1974 |
500 |
C1200 |
| DZZS-4 |
14 |
90*1000 |
4 |
8.8 |
400 |
40 |
200 |
608*4 |
2502 |
1868 |
500 |
C1300 |
| DZZS-6 |
19 |
90*1000 |
6 |
13.2 |
560 |
50 |
250 |
708*5 |
2578 |
1944 |
500 |
C1400 |
| DZZS-8 |
24 |
90*1000 |
8 |
18 |
740 |
65 |
250 |
808*5 |
2644 |
2010 |
500 |
C1500 |
| DZZS-12 |
40 |
90*1000 |
1 |
26 |
1200 |
65 |
300 |
1010*5 |
2854 |
2120 |
600 |
1300*1440 |
| DZZS-18 |
64 |
90*1000 |
1 |
40 |
1800 |
80 |
400 |
1212*6 |
2904 |
2170 |
600 |
1400*1540 |
| DZZS-30 |
106 |
90*1000 |
30 |
66 |
3000 |
100 |
500 |
1616*8 |
3440 |
2840 |
600 |
1800*1940 |
| DZZS-40 |
140 |
90*1000 |
40 |
88 |
3815 |
150 |
500 |
1820*10 |
3560 |
2960 |
600 |
2000*2140 |
| DZZS-60 |
190 |
90*1000 |
60 |
132 |
5700 |
150 |
500 |
2220*10 |
3700 |
3100 |
600 |
2400*2540 |
For twenty-one years, Shanghai Dazhang have been dedicated to the field of filter presses and solid-liquid separation industries. As the main drafters of the industry standards for filter presses and filter plates, our products rank in the top three in terms of production and sales volume in China. Our manufacturing facilities cover an area of over 570,000 square meters, and we employ more than 1,000 staff members.
We are a smart manufacturer and comprehensive service provider of filter presses and sludge dewatering equip-ment.
The company currently has three production bases, eight domestic offices, two international offices, two overseas subsidiaries, and one Sino-German joint venture for high-end filter plate manufacturing. We hold three invention pat-ents and over 100 utility model patents.
We have obtained numerous certifications and honors, including ISO 9001 Quality Management System certification,ISO 14001 Environmental Management System certification, ISO 18001 Occupational Health and Safety Manage-ment System certification, the EU's CE certification, and insurance coverage from PICC, the People's Insurance Company of China.
We strive to offer users beter experiences and more cost-effective and efficient design solutions!
Q1. Are you a manufacturer or a trader?
We're an experienced manufacturer located in Shanghai.
Q2. How about the production capacity of your company?
Our factory covers area over 570,000m
2 and produces machines 9500 sets per year.
Q3. How long is the delivery time for bulk order?
Normally 15-30 working days after deposit. But when the equipment is big and the customers have spe-cial requirement on the equipment, the delivery could be extended.
Q4. What are the payment terms?
Normally by T/T. Deposit first before the production after order is confirmed, and then balance payment after inspection.
Q5. How long is the product warranty period?
One year for normal use, and lifelong on-line service. Wearing parts and problem coursed by worker's wrong operation are not included.
Q6. What's the after sale service of your company?
We will provide foundation drawing to the clients for installation. Besides, we will provide installation video and online guidance. If client need our workers to the site, can be agreed according to your needs.
Q7. Can your company provide wearing parts?
We can produce wearing parts for our clients. If your equipment are not manufactured by our company,please provide us the wearing parts drawing.
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