Industrial Automatic Back-Flushing Filter

Industrial Automatic Back-Flushing Filter
 
General

Particle contamination in process water accelerates the rate of wear of system components.
The particles suspended in the media also have detrimental effects on ends products. In order
to protect the operational infrastructure and to guarantee shorter maintenance times, it is essential
to have a filtration system to remove solid particles from operating fluids.
The automatic back-flushing filter has been highly useful. Numerous operators of power stations,
district heating, sewage treatment plants, and manufacturing plants have relied on this dependable filter
for many years.
Operate principle 
The fluid to be filtered flows through the filter elements of the back-flushing filter, passing from the
inside to the outside. Contamination particles then collect on the inside of the filter elements.
As the level of contamination increases, the differential pressure between the contaminated and clean
sides of the filter increases.
 
 
Back-flushing

1.The gear motor rotates the flushing arm under the filter elements and ensures the contamination is discharged.
2.The contamination is flushed away through the open back-flushing valve.
3.The pressure drop between filtrate side and back-flushing line flushes a small amount of the filtrate
back through the contaminated filter elements.
4.The contamination particles collected on the inside of the filter elements are loosened and flushed
into the backflushing line via the flushing arm.
5.After the "back-flushing time per element" has expired, the back-flushing valve is closed. In this way,
all the filter elements are back-flushed, one after the other.
A back-flushing cycle is terminated once all filter elements have been cleaned.
 
Automatic back-flushing is triggered:

- When the differential pressure trigger point is exceeded,
- By means of an adjustable timer
- By pressing the TEST button.
 
Advantages

Optimum structure and back-flushing design
The special conical shape and configuration of the filter elements allow consistent flow, resulting
in a low pressure drop and complete cleaning of the elements.
Very low-maintenance. Its robust design, specially developed for retrofitting, makes installation in
both existing and new systems fast and cost-effective.

Pulse-aided back-flushing

On the control types EPT and PT, the flushing arm remains under the filter element for only a few seconds.
 
Variable filter isometry:
The inlet and outlet flanges as well as the back-flushing line can be configured in different positions.
This means that the filter can be integrated easily into any system layout.
 
Electromechanical design
Simple install. PLC controller and drop pressure test pipes connected already, connect with air source
can into use.
 

Parameter settable 

Users can set drop pressure and time on actual usage. 
 
Performance

High processing performance	Flow rate up to 10,000 m3/h
High throughput with compact dimensions	Flow-optimized filter
Maximum utilization of the filter area Full filtration performance after back-flushing	Isokinetic filtration and back-flushing
No interruption to operation	Continuous flow of filtrate even during back-flushing
Consistently high quality	Certified to ISO 9001
Unbeatable Δp curve Optimum element geometry provides consistent flow without reverse flow through the filter element	Conical filter elements
Global Presence	Worldwide Service
Long service life	Components tried and tested in thousands of applications
Customized adaptation to the particular application	Numerous equipment options Individually adjustable control parameters
Additional dynamic element cleaning with low loss of flushing fluid	Pulse-aided back-flushing

 
Costs

Excellent price-performance ratio	Extensive standard equipment for real-world applications
Highly reliable User intervention not required Low operating costs	Fully automatic operation
Reduced costs due to simple and space-saving installation	Variable housing isometry
Simple installation and commissioning Safety guaranteed by Pedie function test	Ready-to-operate unit

 
Maintenance  
 

Low maintenance costs	Easy to service
Guaranteed high quality filtrate Low maintenance	Static seal between contaminated and clean side

  
Industries and Applications
Power industry
 Conditioning of industrial waterused to cool generators
 Filtration of sealing water to increase the service lifeof the turbine shaft floating ring seals in
hydroelectric power stations
 
Steel industry
 Filtration of process water to protect nozzlesand pumps in high pressure descaling
 Water conditioning for coolingblast furnaces and rolling mills
 Emulsion filtration in hot and cold rolling mills
 Filtration of rolling emulsions
 
Paper industry
 Protection of all types of nozzles
on paper machines
 Treatment of fresh water (e.g. river water)to be used for cooling
 
Automotive industry
 Filtration of coolant lubricants
 Filtration of washing fluids
 Protection of machine tools
 
Marine
 Pre-filtration forballast water conditioning systems
 
Chemical industry
 Cooling water filtration
 Waste water filtration
 Filtration of chemicals
 
Oil and gas industry
 Filtration of injection water
 Filtration of cooling water
 Filtration of service water
 Filtration of flushing water (pipeline flushing)
Filtration solution for the subsea sector
 
Water / waste water conditioning
 Protective filter before membrane systems
 Conditioning of service water in sewage treatment plants
 
Mining
Filtration of water for shield spraying
Filtration of water for coal-cutting machinery
Treatment of cooling water for mine ventilation
 
Technical specifications

Maximum operating pressure	6, 10 or 16 bar (size-dependent)
Flow rate	5T/H-7500T/H
Filtration ratings	25 μm to 3 mm
Operating temperature	90 °C
Media	Low viscosity liquid, like:water, suspended liquid ≤60MM2/S
Drop pressure between outlet and drain	≥1.5bar
Power supply	Electric or pneumatic
Material of filter housing	Carbon steel (Corrosion protection for carbon steel filter housing) or stainless steel
Material of filter elements	Stainless steel 316
Material of internal parts	Stainless steel 304

 
Power supply
Electric or pneumatic:EPT
Electric: EU

Power supply	EPT	EU
Motor	EU	EU
Drain valve	PT	EU
DP gauge	EU	EU
Position switch	EU	EU
Control box	EU	EU

 
 

NO.	Item.	Model
		DDFLQ 100	DDFLQ 125	DDFLQ 200	DDFLQ 250	DDFLQ 300	DDFLQ 350	DDFLQ 400	DDFLQ 500	DDFLQ 600	DDFLQ 700	DDFLQ 800	DDFLQ 900
1	Inlet/outlet (mm)	100	125	200	250	300	350	400	500	600	700	800	900
2	Flow rate(T/H)	100	100	200	400	500	800	1000	1500	2000	3000	4000	5000
3	Liquid speed(M/S)	3.54	2.26	1.77	1.7	1.96	2.31	2.21	2.12	1.96	2.17	2.21	2.18
4	Motor power: KW	0.55	0.55	0.55	0.55	0.55	0.75	0.75	0.75	1.1	1.1	1.1	1.1
5	Drain drive power: KW	0.09	0.09	0.09	0.09	0.09	0.09	0.09	0.09	0.037	0.037	0.037	0.037
6	Loss(Mpa)	0.02-0.04
7	Filter degree	80-3500um
8	DP(Mpa)	0.01-0.15
9	Back flushing time(S)	0-180
10	Motor rotating speed (R/MIN)	0.75
11	Operate	auto or manual

 
Filter degree

um	100	120	150	200	400	800	1500	3000
Mesh number	150	120	100	80	40	20	10	5

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