Highly Automated Candle Filter

The highly automated candle filter is an advanced solid-liquid separation device, named for its internal filter elements resembling candles. Combining efficient filtration media, a unique structural design, and automated control systems, this type of filter is capable of performing fine filtration of various complex liquid suspensions, continuous operation, automatic cleaning, and cake discharge.

 

Parameters

Working pressure	≤ 10 bar (g)
Operating temperature	≤ 250 °C
Solids content (suspension)	≤ 10% (weight)
Filter cake thickness	≤ 30 mm
Particle size	≤ 0.5 μm
Filtration capacity - Suspension	0.1 - 10 m³/m² h
Filtration capacity - Dry solids	-
Effective filtration area (total)	1 ~ 150 m²

 

Structural Features of Highly Automated Candle Filter

1. Filter Element Structure

a. Main Body: The core component of a candle filter consists of one or more vertically installed "candle tubes." These tubes are composed of a central non-porous tube surrounded by porous tubes, often featuring shapes like plum blossom or American flower patterns to increase filtration area and ensure uniform liquid distribution.

b. Filter Cloth: The outer surface of the candle tubes is enveloped by one or more layers of high-performance filter cloth (or other filtration media), serving as the primary filtration interface. Filter cloth material and pore size are selected based on the properties of the material to be filtered and the required filtration precision.

 

2. Auxiliary Components

a. Base: The bottom of the filter features a removable base cover for cake discharge and cleaning.

b. Collection Pipe: The top of the central tube connects to a collection pipe, which gathers filtrate passing through the filter cloth and discharges it.

c. Backwash System: Comprising air source, piping, and control valves, this system injects backwash gas into the central tube when needed, causing the filter cloth to bulge and effectively dislodging the cake while cleaning the cloth.

d. Control System: Incorporating pressure sensors, level gauges, temperature sensors, PLCs (Programmable Logic Controllers), etc., this system enables automated monitoring and control of the filtration process.

 

Working Principle of Highly Automated Candle Filter

1. Filtration Stage

The feed material, pressurized by a pump, enters the candle filter and passes through the filter cloth into the porous candle tubes. Solid particles are trapped by the cloth, forming a cake layer, while the clarified liquid flows along the tube's center toward the collection pipe.

 

As filtration progresses, the cake thickness increases, but the small interparticle spaces within the cake effectively prevent finer particles from passing through, ensuring effective filtration.

 

2. Cake Dislodgement & Cleaning Stage

When the cake thickness reaches a set value or the filtration differential pressure rises above a threshold, the control system initiates the backwash process. Backwash gas (e.g., air or nitrogen) is injected through the central tube, causing the filter cloth to expand outward, vibrating and dislodging the cake, which falls into the filter's bottom.

 

The backwash gas also removes particles lodged between filter cloth fibers, restoring the cloth's filtration performance. Subsequently, the base cover is closed, new material is filled, and a new filtration cycle begins.

 

Key Advantages of Highly Automated Candle Filter

1. Efficient & Energy-Saving: Optimized structure design and automated control enhance filtration efficiency and reduce energy consumption.

2. Sealed & Precise: Fully enclosed operation minimizes environmental pollution while providing high-precision filtration.

3. Easy Maintenance: Filter elements are easily replaceable, and backwashing is automated, significantly simplifying maintenance tasks.

4. Safe & Reliable: Equipped with multiple safety measures, such as explosion-proofing and overpressure protection, ensuring safe operation.

5. Highly Automated: Achieves automation in filtration, backwashing, cake discharge, and cleaning, catering to continuous and intelligent production demands.

6. Adaptable: Suitable for high-temperature, high-pressure environments, and diverse industry and process conditions.

 

Application Areas of Highly Automated Candle Filter

The highly automated candle filters find wide applications across numerous industries, including but not limited to:

1. Petroleum: Filtration and recovery of crude oil, refined products, and catalysts.

2. Plastics: Clarification filtration of polymer melts, recovering valuable resin particles.

3. Electroplating: Metal ion recovery and impurity removal in electroplating baths and wastewater treatment.

4. Chemicals: Solid-liquid separation and product purification in various chemical product manufacturing processes.

5. Ceramics: Fine filtration of ceramic slurries, enhancing product quality.

6. Pharmaceuticals: Clarification filtration of pharmaceutical intermediates, raw materials, and formulations, meeting GMP requirements.

7. Food & Beverages: Clarification filtration of alcoholic beverages, juices, and soft drinks, ensuring product quality.

 

FAQ

1. Q: What is the function of a filter?

A: The main function of a filter is to remove solid particles, impurities, and harmful substances from liquids or gases, in order to achieve purification, clarification, and protection of equipment.

2. Q: How to choose a suitable filter?

A: When choosing a filter, factors such as the properties of the material being filtered (e.g., viscosity, temperature, corrosion), required filtration accuracy, processing capacity, operating pressure and medium, as well as the type, material, size, and installation method of the filter should be considered.

3. Q: What is the working principle of a filter?

A: The working principle of a filter mainly relies on physical screening, deep interception, absorption, or chemical reactions to remove impurities or harmful components from the material being filtered.

4. Q: How to maintain and care for a filter?

A: Maintenance of filters includes regular cleaning or replacement of filter elements, inspection of seals and fasteners, maintaining stable operating pressure, and avoiding overloading. Specific methods should be referenced from the filter's instruction manual and maintenance guides.

5. Q: What is the service life of a filter?

A: The service life of a filter depends on its working environment, processing volume, and filtration accuracy. Generally, when the filter's pressure drop reaches a certain value or the filtration effect decreases significantly, it needs to be replaced or cleaned.

6. Q: What should be paid attention to during filter installation?

A: During filter installation, attention should be paid to the directionality, ensuring that the fluid enters and exits from the correct ports. Also, the piping system should be cleaned before installation, and the filter should be securely fastened and sealed as required by the instructions.

7. Q: What is the replacement cycle for filters?

A: The replacement cycle for filters depends on their working conditions and filtration requirements, and is usually indicated by pressure difference indicators or timers. When the filter's pressure drop reaches the set value or the filtration effect decreases, it should be replaced in a timely manner.

 

Why Choose Us

· Professional manufacturer with many years' experience

· Good quality with competitive price

· OEM & ODM are welcome

· Various payment items are acceptable

· Good service by experienced manager

 

AIDA Philosophy

1. Management Concept:

· Satisfy the customers' demand --- Touch customers, trust with our products and services

· Make employees happy --- Pursue higher material and spiritual happiness

2. Company Mission:

· Focus on customer needs, provide best filtering solution

· To be the lifelong partner with customers

3. Corporate Vision:

· Become a global purification leadership brand

4. Values:

· Customer: Pursue the ultimate experience, enjoy excellent quality

· Team: Trust, responsibility, growth, win-win

· Work: Simple, sincere, efficient, dedicated