Equipment principle
The rotary drum precision filter is composed of equipment structure module, filter module, driving system, backwashing system and automatic control system.
After the sewage enters the equipment, the automatic control system starts the driving system to drive the drum to rotate, and starts the backwashing system at the same time. Under the action of gravity, the sewage flows out of the drum from the drum, and the suspended solids in the water are intercepted in the drum by the filter screen. The drum rotates slowly, and the backwash pump draws filtered water to backwash the filter screen. The washed dirt falls into the collection tank inside the drum and is discharged outside the equipment through the blowdown pipe.
When sewage enters the equipment, the driving system and backwashing system operate continuously without intermission.
Equipment Composition
① Equipment structure module
The equipment structure module is composed of equipment body and drum, and is made of 304L stainless steel (316L optional).
② Filter module The
filter module is composed of several independent and removable filter screens, which are made of micron-level diameter 316L stainless steel wire through a special process (different precision filters are selected according to the water quality of the inlet water, and imported and domestic filters are provided at the same time) .
③ Drive system The
drive system is composed of a geared motor, a transmission shaft, and a center bearing.
④ Backwashing system The
backwashing system consists of backwashing pumps, pipes, backwashing water filters, nozzles, collection tanks, and sewage pipes.
⑤ The control system
equipment adopts PLC automatic control system. The PLC control system is installed in the electrical control cabinet and can communicate with the central control room in the factory.
Equipment advantages
"Quality" is the basic requirement. In each practice, in the face of different water quality, according to different treatment difficulties, we have developed filters suitable for different water inlets, improved the detailed structure of the equipment, and are committed to "water outlet compliance" and "customer ease of use". Two major goals, and continue to challenge other long maintenance cycles to reduce customer use costs.
1、Oil-free bearings at the water inlet. During the working process, the loss of solid lubricant is small, it can be self-replenishment, the load-bearing force is large, and the water-cooling system is used to completely solve the tile burning.
2、The transmission structure of the gear set at the water outlet. There is no problem of uneven chain transmission, and the maintenance period is long.
3. Bearing lubrication structure at the water outlet. The external refueling structure eliminates the need for operators to enter the cabin, reducing maintenance difficulty and improving user ease of use.
4. Double-ended concentric drum, which has undergone precise coaxiality processing and repeated dynamic balance correction. It aims to prevent the common problem of drum deformation after many years of operation on the market.
5. Based on rich field experience, different precision filters. At the same time, it has reached the three filter core indicators of "high precision", "long life" and "non- decreasing processing capacity".
6. Backwash nozzle system with external main and internal auxiliary. Even in the face of excessive dosing or high SS, it can operate stably, broaden the scope of the equipment's influent water quality, and extend the maintenance cycle of the filter.
7.Humanized electronic control logic. Based on field experience, we have added some user-friendly settings, such as the linkage between the inlet tank level gauge and the bypass solenoid valve. When the inlet tank level is too high, it means that the filter screen flux is attenuated. At this time, the bypass valve is automatically opened. To reduce the risk of filter damage.
Sales and after-sales service
Tailored according to the situation and characteristics of the user site
Establish a "maintenance record" for each equipment that leaves the factory, and call back quarterly
Core technology
China's current GB18918-2002 "Pollutant Discharge Standards for Urban Sewage Treatment Plants" sets three levels of standards for the effluent quality of urban sewage plants, of which the first level standards are divided into A and B standards.
The "Twelfth Five-Year" National Urban Sewage Treatment and Recycling Facilities Construction Plan puts forward that during the "Twelfth Five-Year" period, the national planned investment in the construction of urban sewage treatment and recycling facilities is nearly 430 billion yuan. Most sewage treatment plants need to undergo technological transformation, from Grade B to Grade A.
From the table data, we can see that the level B is increased to level A, and the high allowable emission concentration of SS is reduced from 20mg/L to 10mg/L. This is the main area that the drum type precision filter deals with.
model | Basic control items | Level 1 standard | Secondary standard | Level 3 standard |
A standard | B standard |
1 | Chemical oxygen demand (COD) | 50 | 60 | 100 | 120 |
2 | Biochemical oxygen demand (BOD5) | 10 | 20 | 30 | 60 |
3 | Suspended matter (SS) | 10 | 20 | 30 | 50 |
4 | Animal and vegetable oils | 1 | 3 | 5 | 20 |
5 | Petro | 1 | 3 | 5 | 15 |
6 | Anionic surfactant | 0.5 | 1 | 2 | 5 |
7 | Total nitrogen (calculated as N) | 15 | 20 | — | — |
8 | Ammonia (calculated by N) | 5 (8) | 8 (15) | 25 (30) | — |
9 | Total phosphorus (calculated by P) | Built before December 31, 2005 | 1 | 1.5 | 3 | 5 |
Construction started on January 1, 2006 | 0.5 | 1 | 3 | 5 |
10 | Chroma (dilution times) | 30 | 30 | 40 | 50 |
11 | PH value | 6～9 |
12 | Fecal coliform group number/(pcs/L) | 103 | 104 | 104 | — |
According to our experience with municipal sewage, SS in municipal sewage tail water generally presents two
characteristics of "large quantity" and "small particle size", which puts forward requirements for the filtration accuracy of the filter and requires a small pore size.
The small aperture can only guarantee the interception rate, and in the later operation, it is necessary to achieve a long life (strength requirement) and no attenuation of flux (easy to backwash).
Micrograph of the filter
The relationship between the SS particle size corresponding to the net and the removal rate
The filter screen used by our company for municipal sewage upgrading has a pore size of 26μm, a mesh thickness of 0.15mm, a weight of 0.26g per square inch, and an effective area of 29%. It has good performance parameters and can ensure the interception rate and operating quality to a large extent.
Selection parameter table
model | FLHWL-3000 | FLHWL-5000 | FLHWL-10000 | FLHWL-15000 | FLHWL-20000 | FLHWL-25000 | FLHWL-30000 |
Processing Capacity (m3/d) | 3000 | 5000 | 10000 | 15000 | 20000 | 25000 | 30000 |
Dimensions (mm) | 2900×1220 ×1470 | 2900×1600 ×2060 | 3800×1600 ×2220 | 4700×1600 ×2220 | 5600×1600 ×2220 | 5600×1760 ×2500 | 6500×1760 ×2500 |
Filter area (m2) | 1.5 | 2.5 | 5 | 7.5 | 10 | 12 | 15 |
Outlet diameter | DN200 | DN300 | DN500 | DN500 | DN600 | DN700 | DN700 |
Gear motor power (KW) | 0.55 | 0.55 | 0.75 | 1.1 | 1.5 | 1.5 | 1.5 |
Backwash pump power (KW) | 1.1 | 1.1 | 2.2 | 3 | 4 | 4 | 5.5 |
Backwash water consumption (m3/d) | 20 | 20 | 40 | 60 | 80 | 80 | 100 |
Backwash pressure (bar) | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 |
Application areas:
Municipal sewage upgrading, circulating cooling water side filtration, reclaimed water reuse, river treatment, aquaculture.
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Equipment principle
The rotary drum precision filter is composed of equipment structure module, filter module, driving system, backwashing system and automatic control system.
After the sewage enters the equipment, the automatic control system starts the driving system to drive the drum to rotate, and starts the backwashing system at the same time. Under the action of gravity, the sewage flows out of the drum from the drum, and the suspended solids in the water are intercepted in the drum by the filter screen. The drum rotates slowly, and the backwash pump draws filtered water to backwash the filter screen. The washed dirt falls into the collection tank inside the drum and is discharged outside the equipment through the blowdown pipe.
When sewage enters the equipment, the driving system and backwashing system operate continuously without intermission.
Equipment Composition
① Equipment structure module
The equipment structure module is composed of equipment body and drum, and is made of 304L stainless steel (316L optional).
② Filter module The
filter module is composed of several independent and removable filter screens, which are made of micron-level diameter 316L stainless steel wire through a special process (different precision filters are selected according to the water quality of the inlet water, and imported and domestic filters are provided at the same time) .
③ Drive system The
drive system is composed of a geared motor, a transmission shaft, and a center bearing.
④ Backwashing system The
backwashing system consists of backwashing pumps, pipes, backwashing water filters, nozzles, collection tanks, and sewage pipes.
⑤ The control system
equipment adopts PLC automatic control system. The PLC control system is installed in the electrical control cabinet and can communicate with the central control room in the factory.
Equipment advantages
"Quality" is the basic requirement. In each practice, in the face of different water quality, according to different treatment difficulties, we have developed filters suitable for different water inlets, improved the detailed structure of the equipment, and are committed to "water outlet compliance" and "customer ease of use". Two major goals, and continue to challenge other long maintenance cycles to reduce customer use costs.
1、Oil-free bearings at the water inlet. During the working process, the loss of solid lubricant is small, it can be self-replenishment, the load-bearing force is large, and the water-cooling system is used to completely solve the tile burning.
2、The transmission structure of the gear set at the water outlet. There is no problem of uneven chain transmission, and the maintenance period is long.
3. Bearing lubrication structure at the water outlet. The external refueling structure eliminates the need for operators to enter the cabin, reducing maintenance difficulty and improving user ease of use.
4. Double-ended concentric drum, which has undergone precise coaxiality processing and repeated dynamic balance correction. It aims to prevent the common problem of drum deformation after many years of operation on the market.
5. Based on rich field experience, different precision filters. At the same time, it has reached the three filter core indicators of "high precision", "long life" and "non- decreasing processing capacity".
6. Backwash nozzle system with external main and internal auxiliary. Even in the face of excessive dosing or high SS, it can operate stably, broaden the scope of the equipment's influent water quality, and extend the maintenance cycle of the filter.
7.Humanized electronic control logic. Based on field experience, we have added some user-friendly settings, such as the linkage between the inlet tank level gauge and the bypass solenoid valve. When the inlet tank level is too high, it means that the filter screen flux is attenuated. At this time, the bypass valve is automatically opened. To reduce the risk of filter damage.
Sales and after-sales service
Tailored according to the situation and characteristics of the user site
Establish a "maintenance record" for each equipment that leaves the factory, and call back quarterly
Core technology
China's current GB18918-2002 "Pollutant Discharge Standards for Urban Sewage Treatment Plants" sets three levels of standards for the effluent quality of urban sewage plants, of which the first level standards are divided into A and B standards.
The "Twelfth Five-Year" National Urban Sewage Treatment and Recycling Facilities Construction Plan puts forward that during the "Twelfth Five-Year" period, the national planned investment in the construction of urban sewage treatment and recycling facilities is nearly 430 billion yuan. Most sewage treatment plants need to undergo technological transformation, from Grade B to Grade A.
From the table data, we can see that the level B is increased to level A, and the high allowable emission concentration of SS is reduced from 20mg/L to 10mg/L. This is the main area that the drum type precision filter deals with.
model | Basic control items | Level 1 standard | Secondary standard | Level 3 standard |
A standard | B standard |
1 | Chemical oxygen demand (COD) | 50 | 60 | 100 | 120 |
2 | Biochemical oxygen demand (BOD5) | 10 | 20 | 30 | 60 |
3 | Suspended matter (SS) | 10 | 20 | 30 | 50 |
4 | Animal and vegetable oils | 1 | 3 | 5 | 20 |
5 | Petro | 1 | 3 | 5 | 15 |
6 | Anionic surfactant | 0.5 | 1 | 2 | 5 |
7 | Total nitrogen (calculated as N) | 15 | 20 | — | — |
8 | Ammonia (calculated by N) | 5 (8) | 8 (15) | 25 (30) | — |
9 | Total phosphorus (calculated by P) | Built before December 31, 2005 | 1 | 1.5 | 3 | 5 |
Construction started on January 1, 2006 | 0.5 | 1 | 3 | 5 |
10 | Chroma (dilution times) | 30 | 30 | 40 | 50 |
11 | PH value | 6～9 |
12 | Fecal coliform group number/(pcs/L) | 103 | 104 | 104 | — |
According to our experience with municipal sewage, SS in municipal sewage tail water generally presents two
characteristics of "large quantity" and "small particle size", which puts forward requirements for the filtration accuracy of the filter and requires a small pore size.
The small aperture can only guarantee the interception rate, and in the later operation, it is necessary to achieve a long life (strength requirement) and no attenuation of flux (easy to backwash).
Micrograph of the filter
The relationship between the SS particle size corresponding to the net and the removal rate
The filter screen used by our company for municipal sewage upgrading has a pore size of 26μm, a mesh thickness of 0.15mm, a weight of 0.26g per square inch, and an effective area of 29%. It has good performance parameters and can ensure the interception rate and operating quality to a large extent.
Selection parameter table
model | FLHWL-3000 | FLHWL-5000 | FLHWL-10000 | FLHWL-15000 | FLHWL-20000 | FLHWL-25000 | FLHWL-30000 |
Processing Capacity (m3/d) | 3000 | 5000 | 10000 | 15000 | 20000 | 25000 | 30000 |
Dimensions (mm) | 2900×1220 ×1470 | 2900×1600 ×2060 | 3800×1600 ×2220 | 4700×1600 ×2220 | 5600×1600 ×2220 | 5600×1760 ×2500 | 6500×1760 ×2500 |
Filter area (m2) | 1.5 | 2.5 | 5 | 7.5 | 10 | 12 | 15 |
Outlet diameter | DN200 | DN300 | DN500 | DN500 | DN600 | DN700 | DN700 |
Gear motor power (KW) | 0.55 | 0.55 | 0.75 | 1.1 | 1.5 | 1.5 | 1.5 |
Backwash pump power (KW) | 1.1 | 1.1 | 2.2 | 3 | 4 | 4 | 5.5 |
Backwash water consumption (m3/d) | 20 | 20 | 40 | 60 | 80 | 80 | 100 |
Backwash pressure (bar) | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 |
Application areas:
Municipal sewage upgrading, circulating cooling water side filtration, reclaimed water reuse, river treatment, aquaculture.
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