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- Wedge Wire Candle Filter Elements
Wedge Wire Candle Filter Elements
Stainless Steel Johnson Screen Candle Filter is a vertical, multi-element, precision surface filtration system. Its core filtering components are "candle-shaped" filter elements manufactured using wedge wire winding and welding technology. Multiple Johnson filter candles are suspended vertically and fixed to a tube sheet within a pressure vessel housing. The operating principle involves the process liquid flowing from outside to inside through the precise wedge-shaped slots on the candle's surface. Solid particles are retained on the external surface, forming a filter cake, while clean filtrate is collected from the internal channel of each candle and discharged. This system is particularly suited for demanding applications requiring high flow rates, high solid content, precision filtration, or dry cake discharge.
Product Features and Advantages
High Precision & Reliable Filtration
Uniform and precise wedge wire slots (typically 25-200 microns) ensure stable, consistent filtration accuracy and superior filtrate clarity.
Exceptional Mechanical Strength & Stability
The triangular support weld structure enables the candles to withstand high filtration pressure differentials (typically up to 6-10 bar) and the mechanical stress of frequent back-pulsing, offering superior deformation resistance and an extremely long service life.
Large Filtration Area, High Throughput
Dozens to hundreds of filter candles can be densely installed in a single vessel, providing a vast effective filtration area within a compact footprint and resulting in high volumetric processing capacity.
Efficient Cake Handling & Regeneration
Utilizes reverse gas (or liquid) pulse jet technology to instantaneously and uniformly dislodge the external filter cake, enabling dry cake discharge or slurry discharge. This ensures thorough regeneration, high automation, and reduced manual cleaning.
Long Service Life & Low Operating Costs
The robust metal filter elements can endure thousands of cleaning cycles, eliminating the need for disposable consumables like filter bags or cloths. This requires minimal maintenance and offers significant long-term economic benefits.
Product Parameters (Customizable)
| Parameter Category | Typical Specifications & Descriptions |
| Filtration Rating (Slot Size) | Range: 25μm – 2000μm
• Precision Filtration: 25 – 100 μm (Typical) • Coarse/Precoat Filtration: 100 – 500 μm • Large Particle Separation: 0.5 – 2 mm |
| Candle Material | 304/316L Stainless Steel (Standard), Duplex Steel, Hastelloy, Titanium, etc. |
| Candle Dimensions | Outer Diameter: φ25 – φ80 mm; Length: 500 – 2500 mm (Customizable). |
Application Areas/Scenarios
Chemical & Petrochemical Industry
Catalyst recovery and separation (e.g., PVC, PTA).
Solid-liquid separation of polymers (e.g., PET, Polyolefins).
Precision filtration of oils, solvents, and acids.
Food & Pharmaceutical Industry
Clarification of syrups, juices, edible oils, and alcoholic beverages.
Mycelium separation from fermentation broths, collection of active ingredients.
Solid-liquid separation of crystal slurries (sanitary design available).
Environmental & Wastewater Treatment
Final polishing filtration and suspended solids recovery from industrial wastewater (e.g., plating, pigments, ceramics).
Dewatering of Flue Gas Desulfurization (FGD) gypsum slurry.
Other Industries
Nuclear industry process fluid filtration.
Filtration of ceramic glazes and pigments.
Washing and dewatering of ultra-fine powders (e.g., titanium dioxide).
Summary
The Stainless Steel Johnson Screen Candle Filter represents the pinnacle of surface filtration technology. It perfectly combines the precision and robustness of Johnson screens with the high surface area and automated regeneration advantages of a candle filter system. It is an ideal solution for modern industrial processes that require continuous operation, high throughput, precise filtration, and dry cake discharge to reduce waste handling costs. It is an efficient, reliable, and low total-cost-of-ownership solution for advanced solid-liquid separation.
OUR PRODUCTS
Best-selling Products
Starch Screen
The Wedge Wire Starch Curved Screen is a curved screening device specifically designed for the starch industry. It features an arc-shaped screen surface made of precisely welded V-profile stainless steel wires, utilizing centrifugal force or gravity to achieve rapid dewatering and classification of starch slurry. Its curved structure prolongs slurry retention time, improving solid-liquid separation efficiency. It is suitable for starch extraction, refining, and byproduct recovery processes for starches such as potato, corn, and cassava. Characterized by efficient screening, wear and clogging resistance, and easy maintenance, this equipment is a key solid-liquid separation device in modern starch processing.
Rotary Drum
The Stainless Steel Wedge Wire Rotary Drum Screen (also known as a Rotary Drum Strainer or Micro-Screen) is a continuously and automatically operating front-end solid-liquid separation device. Its core component is a large cylindrical drum installed horizontally or at a slight incline. The entire circumferential surface of the drum is covered with a stainless steel wedge wire screen (Johnson screen). The wastewater to be treated flows into one end of the drum. Under gravity, the filtrate passes through the wedge wire slots, while solid suspended matter (such as fibers, hair, plastic pieces, and fine particles) is retained on the inner surface of the drum. As the drum rotates slowly, the retained debris is lifted to the top, where it is flushed by spray water into a collection trough, achieving a continuous process of automatic screening, filtration, and residue removal
Screen Basket for Screw Press Separator
The stainless steel wedge wire screen basket, commonly known as the "V-wire screen," "press screen basket," or "screen cylinder," is a core component of screw press solid-liquid separators. It is installed inside the spiral press, enclosing the rotating screw shaft. The working principle is as follows: raw slurry with high moisture content is pushed into the screen basket by the screw shaft. Under the squeezing and conveying action of the spiral flights, the liquid (filtrate) is forced out through the precise, continuous slots of the screen basket, while the solid material (manure cake) is retained inside and continues to be compressed and dewatered as it moves forward. Finally, the dewatered solids are discharged from the outlet, achieving solid-liquid separation.
Wedge Wire Vibrating Screen
A stainless steel wedge wire vibrating screen is a solid-liquid separation device featuring a screen surface made by precisely welding V-shaped stainless steel wires, integrated with a high-frequency vibration system. With uniform slots, wear resistance, and corrosion resistance, it is suitable for wet screening and dewatering operations. The vibration mechanism enables rapid material dispersion and efficient sieving while effectively preventing screen clogging. Widely used in industries such as mining, metallurgy, food processing, and environmental protection, it is particularly suitable for handling fine particles, high-viscosity, or easily agglomerated materials, offering advantages such as high screening accuracy, large processing capacity, and long service life.
Wedge Wire Water Well Screen
Johnson Deep Water Well Screens, also referred to as continuous slot screens or wire wrap screens, were originally developed to solve sand control challenges in fine-grained and uniform sand formations. These geological conditions are commonly encountered in deep groundwater aquifers, where conventional perforated pipes often suffer from clogging, excessive sand production, and reduced well efficiency.
Sintered Mesh Plate and Disc
Sintered Mesh Plates and Discs are high-precision filtration components fabricated by bonding multiple layers of stainless steel wire mesh through a specialized vacuum sintering process. Unlike traditional mesh that relies on mechanical weaving alone, these plates are fused at every contact point, transforming individual wires into a rigid, integrated porous metal sheet.
These plates can be customized into various shapes, most commonly circular discs, to fit specific industrial equipment. They offer an ideal balance of high permeability, extreme structural integrity, and precise filtration ratings. Because they are made entirely of metal (typically 304 or 316L), they provide a "permanent" filtration solution that can withstand high temperatures and corrosive chemicals while remaining fully cleanable and reusable.
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