Horizontal self cleaning filter

What is a horizontal self-cleaning water filter

Horizontal self-cleaning filter is one of the common water filters that can be used in industry and irrigation. The shell of the horizontal water filter is horizontal, and the control mode can be selected from differential pressure, time, manual and PLC control.
The filter is used to directly intercept the impurities in the water, remove the suspended solids and particulate matter in the water body, reduce the turbidity, and purify the water quality, thereby reducing the generation of system fouling, algae, rust, etc., so as to purify the water quality and protect the normal operation of other equipment in the system.

Two types of horizontal self-cleaning filters

1. Sucking type self cleaning water filter

What is a sucking self-cleaning filter

The sucking type self-cleaning filter uses the filter screen to directly intercept the impurities in the water, remove the suspended solids and particles in the water, reduce the turbidity, purify the water quality, reduce the generation of system fouling, algae, rust, etc., so as to purify the water quality and protect the normal operation of other equipment in the system The water enters the self-cleaning filter body from the water inlet, and the suction self-cleaning device is driven by an external two-way motor to rotate in a spiral manner, and the impurities accumulated on the surface of the filter screen are sucked and discharged through the drain valve. Due to the intelligent (PLC, PAC) design, the system can automatically identify the degree of impurity deposition, and send the sewage valve signal to automatically discharge the sewage.

Working principle of sucking horizontal self-cleaning filter

Dirty water enters from the filter inlet, first through the coarse filter to filter out larger particles of impurities, and then to the fine filter. During the filtration process, the fine filter gradually accumulates dirt and impurities in the water to form a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed between the inner and outer sides of the fine filter. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal will be transmitted to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel sucking scanner that moves up and down in a spiral. It is a hollow structure with several suctions vertically distributed at a certain distance on its axis. The inside of the suction scanner is communicated with the 3" blowdown valve. When the blowdown valve is opened, the pressure difference formed between the water pressure inside the filter and the external atmospheric pressure makes each suction nozzle generate strong suction. When the water flows from the outside of the filter screen to the inside at a high speed, the impurities attached to the inner wall of the filter screen will be washed down and entered into the suction nozzle, through the hollow shaft of the suction scanner, and then discharged through the sewage valve. It takes about 30-60S to complete the entire cleaning process. The pressure difference returns to normal, a cleaning process ends, and the filter state is entered. During the cleaning process, the system flows continuously.

Suction type self-cleaning water filter parameters

Flow range: 15-800t/h
Filter element form: stainless steel weaving (high precision), stainless steel wedge mesh (low precision)
Filter material: 304, 316L
Filter element accuracy: 10-500um (sintered mesh), 100um-3000um (wedge mesh)
Conventional pressure: 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa customized according to special specifications
Shell material: CS, 304, 316
Working temperature: 0-85℃ (85℃-200℃ need to be customized according to the actual site conditions)
Control electric box: PLC control (including remote signal)
Control mode: manual, differential pressure, time
Cleaning time: 10-60S
Cleaning pressure loss: 0.01Mpa

2. Brush type horizontal self-cleaning water filter

What is a brush type horizontal self-cleaning filter

The shell material of the brush type horizontal self-cleaning filter is carbon steel or stainless steel, and the stainless steel material has good corrosion resistance, pressure resistance, rust resistance, etc., which is important for a water filter. There are many types of sewage, and the filtration of acidic sewage cannot be avoided. Acid sewage is highly corrosive, and general materials have poor corrosion resistance and cannot be used in water filtration. The stainless steel material used in the self-cleaning filter can meet this requirement, and the anti-rust properties and pressure resistance enhance the service life of the brush filter. The high-precision filter element is worn, and the pressure test is not deformed. The factory accuracy test meets the user's requirements.

Working principle of horizontal self-cleaning water filter

The water to be treated enters the body from the water inlet, and the impurities in the water are deposited on the stainless steel filter screen, thereby generating a pressure difference. The pressure difference between the inlet and outlet is monitored by the differential pressure switch. When the pressure difference reaches the set value, the electric controller sends a signal to the hydraulic control valve and the drive motor, which triggers the following actions: the motor drives the brush to rotate, cleans the filter screen, and controls the valve at the same time. Open for sewage discharge, the entire cleaning process only lasts for tens of seconds. When the cleaning is over, close the control valve, the motor stops rotating, the system returns to its initial state, and begins to enter the next filtration process. After the equipment is installed, the technicians will debug, set the filtration time and cleaning conversion time, the water to be treated enters the body from the water inlet, and the filter starts to work normally. When the preset cleaning time is reached, the electric controller will supply the hydraulic control valve. , Drive the motor signal to trigger the following actions: the motor drives the brush to rotate, cleans the filter element, and at the same time the control valve is opened to discharge the sewage. The entire cleaning process only lasts for tens of seconds. The system returns to its original state and begins to enter the next filtering process.

Main parameters of horizontal electric brush self-cleaning filter

Single set of water treatment range: 15-2800t/h
Minimum working pressure: 0.1Mpa
Maximum working pressure: 1.0/1.6/2.5/4.0Mpa
Pressure loss: ≤0.01Mpa
Filter element accuracy: 100-3000um (wedge mesh) 800um-5000um (drilled mesh)
Conventional pressure: 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa customized according to special specifications
Shell material: CS, 304, 316
Filter material: 304, 316L, 2205
Filter type: stainless steel wedge mesh, stainless steel drilling mesh
Temperature: 0-85°C (85°C-200°C needs to be customized according to the actual site conditions)
Control box: PCB integrated circuit control, PLC control (including remote signal)
Control mode: manual, differential pressure, time
Rated operating voltage: three-phase, 380V, 50Hz

Features of horizontal self-cleaning water filter

The horizontal self-cleaning filter has a simple design and a small footprint;
The reverse cleaning time is short, the pressure loss is small, and the sewage consumption is small, which does not exceed 1% of the total flow;
High filtration precision, suitable for all kinds of water quality;
Intelligent control system (PLC, PAC) control, high degree of automation, can realize remote control;
Equipped with motor overload protection, which can effectively protect the motor;
The characteristics of uninterrupted water supply and no need for bypass when cleaning and discharging sewage;
Strong maintainability, easy installation and disassembly;
The connection method with the user's pipeline is flange connection, and the flange adopts the national standard flange, which has strong versatility;
Long service life, the filter is used for life, no need to replace

Installation of horizontal self-cleaning water filter

The horizontal self-cleaning water filter should be installed close to the maintenance system, but the filter inlet is a very difficult problem when flushing the pressure, so the horizontal self-cleaning filter should also be installed in the direction close to the pressure source.
1. When it is confirmed that the lower filter of the system with a pressure not greater than 0.2Mpa is backwashed.
2. Ensure that the diameter of the working pressure source is the same as that of the inlet of the horizontal self-cleaning filter.
3. When the filter needs to be maintained and the water supply company cannot use it uninterruptedly, a valve should be installed at the inlet and outlet of the filter, and a bypass valve should be installed between the inlet and outlet.
4. Install a check valve at the outlet of the horizontal self-cleaning filter where there is a problem and cannot be returned.
5. The lower requirement of the filter device is to install a valve at the outlet of the horizontal self-cleaning filter to facilitate the troubleshooting of the filter.
6. Confirm that the horizontal self-cleaning filter and the system flow in the same direction.
7. Confirm that there is enough maintenance space so that the internal components can be removed.

Application of horizontal self-cleaning filter

Industrial Filtration Applications
Cooling water filtration; protection of nozzles; tertiary treatment of sewage; municipal water reuse; workshop water; R. O. pre-filtering of the system;
Pickling; Papermaking White Water Filtration; Injection Molding Machines; Pasteurization Systems; Vacuum Pump Systems; Air Compressor Systems; Continuous Casting Systems; Water Treatment Applications;
Refrigeration heating water system.
Irrigation Filtration Applications
Groundwater; Municipal Water; Rivers, Lakes, Seawater; Orchards; Nurseries; Greenhouses; Golf Courses; Parks.

What should you pay attention to when using a horizontal self-cleaning filter?

Although the fully automatic self-cleaning filter greatly reduces the cost of labor, there are still some matters that need attention:
1. Pay attention to the maintenance of the control box, sensors and transmission parts.
2. Follow the prompts to keep the direction of the water flow consistent with the direction of the arrow on the body.
3. The automatic self-cleaning filter must be close to the water equipment.
4. The sewage pipe should not exceed 10 meters.
5. The self-cleaning filter can only be used according to the rated voltage/frequency indicated on the nameplate.
6. The filter should be maintained at regular intervals.