Structural Composition
Filtration Tank: Made of stainless steel 304 or 316L, it has excellent corrosion resistance and high strength, capable of withstanding high working pressures and adapting to various complex working conditions.
Candle Filter Element Set: Composed of multiple vertically arranged candle - type filter elements. The surface of the filter elements is covered with high - precision filter media. Materials such as woven mesh, filter cloth, or sintered filter elements can be selected according to different filtration requirements to achieve precise filtration.
Backwash System: Includes backwash pipes, valves, and pressure devices. Controlled by an automated program, it realizes online cleaning of filter elements and restores filtration performance.
Control System: Equipped with an advanced PLC intelligent control system, it monitors operating parameters such as filter pressure, flow rate, and liquid level in real - time, and automatically controls the entire working process including filtration, slag discharge, and backwashing.
Working Principle：The material to be filtered enters the filtration tank under pressure and is evenly distributed around each candle - type filter element. The liquid passes through the filter medium on the surface of the filter element and enters the inside of the element, while impurities are intercepted on the outer surface of the filter element to form a filter cake. When the filter cake reaches a certain thickness or the pressure difference between the inlet and outlet reaches the set value, the system automatically switches to the slag discharge mode. The slag discharge valve is opened to discharge the filter cake, followed by backwashing to remove residual impurities. After completion, it returns to the filtration state, achieving continuous automatic operation.
Core Advantages：Compared with traditional filters, the automatic candle filter realizes fully automated operation, reducing the need for frequent manual intervention and labor costs. It has high filtration accuracy, meeting the high - precision requirements of different industries for solid - liquid separation. The design of candle - type filter elements increases the filtration area, improving processing efficiency. It also has good airtightness, preventing material leakage and environmental pollution.
Filtration Stage
Open the feed valve, and the material to be filtered enters the filtration tank under the action of a pressure pump and evenly flows towards each candle - type filter element.
The liquid in the material passes through the filter medium on the surface of the filter element, converges through the internal channels of the filter element, and is discharged from the liquid outlet. Impurities are intercepted on the outer surface of the filter element and gradually form a filter cake.
The control system monitors the pressure difference between the inlet and outlet of the filter and the operation time in real - time.
Slag Discharge Trigger
When the filter cake on the outer surface of the filter element thickens, causing the pressure difference between the inlet and outlet to reach the set threshold (such as 0.3 - 0.5MPa), or the operation time reaches the preset duration (such as 4 - 8 hours).
The control system determines that slag discharge is required and automatically issues an instruction to switch the working mode.
Slag Discharge Process
Close the feed valve and the liquid outlet valve, open the slag discharge valve, and use the internal pressure of the tank or auxiliary compressed air to blow the filter cake off the surface of the filter element and discharge it from the slag discharge port.
After the slag discharge is completed, close the slag discharge valve.
Backwashing Stage
Activate the backwash system, and the cleaning liquid flows into the filter element in the reverse direction through the backwash pipe to flush away the residual impurities.
The backwashing time is controlled according to the set parameters (usually 5 - 15 minutes) to ensure the filter element is clean.
Resumption of Operation：After the backwashing is completed, close the backwash system, reopen the feed valve and the liquid outlet valve, and the filter returns to the filtration stage to continue the solid - liquid separation work.
| Features | Details |
|---|
| Fully Automatic Operation | PLC intelligent control automatically completes the entire process of filtration, slag discharge, and backwashing, reducing manual intervention and labor intensity. |
| High - Precision Filtration | Filtration accuracy can reach 0.1 - 100 microns, meeting the strict requirements of the chemical, pharmaceutical, and other industries for material purity. |
| Large Processing Capacity | The parallel design of multiple candle - type filter elements increases the filtration area, and the unit - time processing capacity is 30% - 50% higher than that of traditional filters. |
| Closed and Environmentally Friendly | The fully closed structure prevents material leakage and the escape of volatile gases, complies with environmental protection requirements, and ensures the safety of the working environment. |
| Durable and Easy to Maintain | The stainless - steel body and high - quality filter elements are corrosion - resistant and wear - resistant. The modular design makes filter element replacement convenient and reduces maintenance costs. |
| Flexible Adaptability | It can adjust filtration parameters and replace filter element materials according to different material characteristics and process requirements, with strong applicability. |
| Parameter Category | Specific Parameters |
|---|
| Processing Flow Rate | 1 - 200m³/h (customizable) |
| Filtration Precision | 0.1 - 100 microns |
| Operating Pressure | ≤1.0MPa |
| Operating Temperature | -10℃ - 120℃ |
| Filter Element Material | Stainless steel, polypropylene, polyester fiber, sintered metal, etc. |
| Shell Material | Stainless steel 304, stainless steel 316L |
| Tank Volume | 500 - 10000L |
| Slag Discharge Method | Pressure slag discharge, compressed - air - assisted slag discharge |
Chemical Industry: Filters various chemical raw materials, intermediate products, and finished products, such as resins, coatings, lubricating oils, etc., to remove solid impurities and improve product purity and quality stability.
Pharmaceutical Industry: Used for filtering liquid medicines and suspensions, intercepting impurities such as bacteria and insoluble particles, meeting the GMP requirements of drug production, and ensuring the safety and effectiveness of drugs.
Food and Beverage Industry: Filters fruit juices, wines, edible oils, dairy products, etc., to remove pulp residues, yeast, suspended solids, etc., improving product clarity and taste and extending the shelf life.
Petroleum and Petrochemical Industry: Filters oil products such as crude oil, diesel oil, and lubricating oil, separates impurities such as sediment, rust, and colloid, protects downstream equipment, and improves the quality of oil products.
Sewage Treatment: In the treatment of industrial wastewater and domestic sewage, it separates suspended solids, colloids, and other impurities in the sewage, reducing the load of subsequent treatment processes and facilitating compliant discharge or reclaimed water reuse.
New Energy Industry: Used for filtering lithium - battery slurry, liquids used in photovoltaic production, etc., to ensure the purity of raw materials and improve the production quality and stability of new energy products.
What factors affect the service life of the filter elements of the automatic candle filter?：The service life of the filter elements is mainly affected by factors such as the properties of the filtered material (such as impurity content, particle hardness, corrosiveness, etc.), working pressure and temperature, filtration time, and backwashing effect. Materials with high impurity content and hard particles will accelerate the wear of the filter elements. Long - term operation under overpressure and over - temperature conditions will also shorten the service life of the filter elements. Incomplete backwashing, with residual impurities, will block the pores of the filter elements. Therefore, it is necessary to reasonably adjust operating parameters according to the material characteristics, regularly check the backwashing effect, and extend the service life of the filter elements.
What should I do if there are abnormal pressure fluctuations during the operation of the equipment?：Abnormal pressure fluctuations may be caused by various reasons. If the pressure suddenly increases, it may be due to severe blockage of the filter elements, incomplete slag discharge, or the pipeline valves not being fully opened. It is necessary to check the condition of the filter elements, the slag discharge situation, and the opening and closing status of the valves. If the pressure suddenly drops, it may be due to insufficient feed, pipeline leakage, or damaged seals. The feed system, pipeline connections, and sealing devices should be checked. When abnormal pressure occurs, the equipment can be suspended first, the cause of the failure can be investigated and dealt with in a timely manner. If necessary, contact professional technicians for assistance.
The automatic candle filter, with its intelligent automation, high - precision filtration, and efficient processing capabilities, has become an ideal device for many industries to achieve high - quality solid - liquid separation. Whether in the chemical and pharmaceutical fields with strict product quality requirements or in the food and sewage treatment industries that emphasize both environmental protection and efficiency, it can provide reliable and stable solutions. Choosing our automatic candle filter means choosing an efficient, intelligent, and worry - free solid - liquid separation solution to escort production and operation.
If you are interested in this product or have any questions, please feel free to contact us at any time.
Backwash filter
https://www.le-filter.com/self-cleaning-filter/backwash-filter/
Shallow sand filter
https://www.le-filter.com/wastewater-treatment/shallow-sand-filter/
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