Candle Filter

The candle filter is a filter that uses a filter element as the skeleton, solid particles or filter aids as the filter medium, and uses pump pressure to achieve liquid clarification. It is an advanced filtration system that has been carefully designed and has reliable filtration effects. The filter cloth support tube is composed of a non-porous central tube and six porous tubes. The cross-section is plum blossom shape. The central tube can drain the accumulated liquid and reduce material waste.

Application Areas

1. Chemical industry: high-purity alumina filtration; solvent oil filtration; crude oil filtration; filter aid filtration; amine liquid desulfurization process filtration, etc.

2. Water treatment: heavy metal wastewater, mine wastewater, fluorine-containing wastewater; filtration of wastewater containing suspended solids in chemical production; filtration of river water, groundwater, river water, and swimming pool water.

3. Grease ink: industrial oil dewaxing, decolorization, fine filtration; hydraulic oil, mixed oil, diesel, kerosene, lubricating oil, transformer oil filtration, etc.

Product Information

1. It can be used for direct filtration, pre-coating filtration, slurry concentration, filter cake recovery, washing and drying;

2. PLC automatic control, all backflushing processes can be fully automated;

3. Filter element grouping design reduces backflush air consumption and isolates damaged filter elements;

4. The distance between filter elements is adjustable to adapt to different filter cake thickness requirements;

5. Completely sealed filtration, no leakage, no environmental pollution;

6. The filter element adopts various forms and has a wide range of applications. It can be backwashed and regenerated, and can achieve complete filtration in one time;

7. The filter cake can be recycled and dried to obtain maximum economic benefits;

8. The gas backflush can discharge slag cleanly and quickly, and is suitable for a variety of viscous materials;

9. Suitable for viscosity materials, large solid content, and high filtration accuracy. (Generally ranging from 0.22μm, 0.5μm, 1μm)

Process Flow

Pre-coating ⇒ Filtration ⇒ Pressing and discharging thick slurry ⇒ Backflushing and slagging ⇒ Cleaning filter element ⇒ Filtration

1. Filtration process: The clean liquid is filtered out through the filter element under pressure, and the solid particles accumulate on the surface of the filter element to form a uniform filter cake. The filter cake remains on the filter element due to its concave and convex contour and the continuously maintained pressure difference.

2. Slurry discharge process: At the end of the filtration cycle, the unfiltered residual liquid left in the filter tank must be drained out so that the residual filter cake can be further processed. Compressed gas, air or nitrogen must be introduced into the tank to continuously add slurry. Pressure to completely remove the residual liquid in the tank, part of it is removed from the clear liquid tank and part of it is removed from the residual liquid tank.

3. Drying of the filter cake: After cleaning, use gas, that is, cold air or hot air, nitrogen or steam, to continue the operation until the best possible residual moisture is achieved. If the filter cake needs to be dried, a bottom filter must be added at the bottom of the equipment. .

4. Filter cake unloading: After completing the filter slurry discharge, cleaning and drying the filter cake, introduce compressed air to start backflushing the filter element and the filter cake will fall off and be discharged from the slag discharge port.

5. Filter element cleaning: After the slag removal and discharging is completed, nitrogen, steam, clean water, hot water or filtered liquid is used to clean the filter element.