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Backwashing Automatic Filter Housing System Bcmseries
Backwashing Automatic Filter Housing System Bcmseries
Backwashing Automatic Filter Housing System Bcmseries
Backwashing Automatic Filter Housing System Bcmseries

Backwashing Automatic Filter Housing System Bcmseries


Full automatic back washing filter housing BCM series”

BCM full automatic back washing filter housing is suitable for filtering high flow, high speed, and low viscosity fluid particle impurity.

BCM full automatic back washing filter housing is a mechanical and electrical product with following advantages;

.reasonable design

.high filtration efficiency

.low operating costs

.continuous filtration in back washing process etc

It is widely used in metallurgy, chemical, electric power, oilfield injection water, ballast water, environment-friendly water treatment, etc.

Working principle of BCM full automatic back washing filter housing:

The filtered liquid is flowing from the inlet to the filter housing, then going through the fixing plate into the filter housing, the liquid flows from the filter element inside to the outside. Afterwards it flows out from the filter vessel outlet. Impurities produced from back washing filter flows out from the sewage outfall.

Advantages of backwash filter

1. The filter equipment adopts the internal mechanical structure of patented technology, ensuring the real backwash function which can completely remove the impurities trapped by the filter screen, without dead corners and flux attenuation, providing the higher filter efficiency and long service life.

2. The filtering equipment is made of 304, 316L 2205, MONEL and other wedge-shaped filter screens. Which have high strength, high accuracy, corrosion resistance and the highest filtering accuracy of 25 microns.

3. The filtering equipment can ensure automatic back washing through its own retrieval and response functions, and can cope with unstable water quality fluctuations without manual intervention.

4. The control system of the filtering equipment is sensitive and operates accurately. The backwash differential pressure and time setting values can be flexibly adjusted according to different water sources and filtering accuracy.

5. During back washing of filter equipment, each group of filter screens shall be back washed in turns. To ensure that the filter screen is cleaned safely and efficiently without affecting other filters and continue to filter.

6. The filtering equipment adopts pneumatic blow down valve, so the back washing time is short. The back washing water consumption is little and the environment is economic.

7. The filter equipment has compact and reasonable structure design, small floor area, flexible and convenient installation and movement.

8. The filter equipment has few vulnerable parts .they are not consumables and have low operation and maintenance costs. They have simple operation and management.

9. The working status of the filtering equipment is displayed by the touch screen or digital screen and the differential pressure and time settings are convenient and intuitive. .

How it works?

When liquid flows through the filter element. The solid particles will be trapped in the inner side of the filter element. With the increase of pollutants, the differential pressure between the contaminated side and the clean side of the filter is gradually increase. When the differential pressure reaches the set value, the differential pressure meter sends a message and the filter housing starts automatic back washing process.

Back washing process:

1. Gear motor drives washing arm to turn round by the jack shaft, the rotation angle of the washing arm is controlled by a photoelectric positioning switch, which will make it align to the cleaned filter.

2. The drain valve is opened, so that differential pressure will form between the filter element of the outside (clean side) and pollutant drainage.

3.Under the action of pressure difference, liquid of the clean side will flows from cleaned filter outside to inside to carry out back washing process, pollutants accumulated in the inner side of the filter screen will be washed away and flow out the filter through the sewage outfall.

4. The back washing time of each filter element has been set, so when the back washing time is reached, the pollution discharge valve will be close, and this back washing process of filter element is over, then gear motor will drive washing arm to turn again, conducting back washing to the next set of filters, sewage valve will be open again and so on to conduct back washing process to each mesh.

5. After all filter cleaning is completed, the washing arm returns to the original position under the control of the photoelectric switch, which means a back washing cycle is end.

6. Because the back washing is happening to a set of filters in turn, therefore during the process the filter can maintain a continuous fluid filtration state.

Set back washing process:

1. Differential pressure setting: the filter has differential pressure gauge, which is used to set filter differential pressure.

2. Time setting: the control box has time setting device, which can be used to set back washing process cycle according to user requirements. Differential pressure setting and time setting are automatic back washing configuration process, the two settings exist at the same time, while pressure setting is prior.

3. Manual start: In addition to differential pressure setting and time setting automatic back washing process. There is also TEST key to manually start the process, which is used for debugging and maintenance.

4. Filter equipment control system is sensitive, accurate operation, and can flexibly adjust the differential pressure and time setting value of back washing based on different water and filter accuracy.

5.During the back washing process, each filter vessel is conducted back washing in turn; which ensures the filter screen safety, efficient cleaning, while other filters are not affected and continue to be filtered.

6.Filtering equipment have less vulnerable parts, no consumable material, with low operating and maintenance costs and easy operation and management.

7.The filter equipment is designed compact and reasonable, with a small size, which is flexible and convenient for installation and movement.

8.Filtration equipment uses pneumatic drain valve, with a short time of back washing process, less water consumption, environmental protection and economic.

9.Filtering equipment working state is displayed by the touch screen, and the differential pressure and time setting is convenient for view.

Main model of filterBCM400   BCM500    BCM600   BCM800   BCM1000   BCM1200
Filtering area (m2)1.56  2.64  4.05   5.91   10.45  15.72
Number of filter elements10  18  26  33  49   64
Volume (L)130  200   296   610  895  1695
Size of inlet and outletDN150  DH200   DH250     DH350  DH400    DH500
Size of drain outletDN40 DN65  DN65  DN80  DN80   DN80
Applicable liquidHigh flow, high speed, low viscosity ( 100mPas) impurity mass < 1000ppm)
Filtering precision50-2000μm
Standard design pressure rating1.0MPa higher can be customized
Design temperature0-200C (depending on seals)
Cleaning differential pressure50-100KPa (determined by liquid viscosity)
Differential pressure instrumentDifferential pressure switch/pressure transmitter/differential pressure transmitter
Inlet and outlet connection standardFlange. HG20592-2009 (standard design) HG20615-2009 (compatible with ANSI B16.5): ON11851 round thread union
Filter element seriesMS
Shell wetted material304/316L/CS
Material of backwashing rotary arm304/316L
Shell sealing materialNBR/EPDM/VITON/silicone rubber/FEP coated silicone rubber
Filter element sealing material brigadeNBR/EPDM/VITON/silicone rubber/FEP coated silicone rubber
Piston rod sealing materialNBR/PU /VITON
Blowdown and slag discharge valveFull bore pneumatic ball valve                                        Single acting or double acting 304/316
Utility supply requirements220V AC 0.4-0.6MPa clean dry compressed air for control system

Sea water desalination, circulating cooling water and oilfield re-injection water, ballast water for ship, boiler reuse water, Ultra filtration ,back osmosis filtration, ion exchange pre-treatment, Paper nozzle filter.4.Filter equipment control system is sensitive, accurate operation, and can flexibly adjust the differential pressure and time setting value of back washing based on different water and filter accuracy.


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