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934287166@qq.com
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15821588900
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No.1 East Industrial Park, Yangzhai Avenue East Section, Chuhe Street, Yuzhou City, Henan Province
Henan Jincheng Industrial Technology Co., Ltd
Working principle and characteristics of automatic candle filter
Date: 2025-06-16Read: 0
Automatic candle filter is an efficient and closed solid-liquid separation equipment, and its core working principle and characteristics are as follows:
1、 Working principle
1. Formation and filtration of filter cake layer
The liquid to be filtered enters the sealed cylinder from the top or bottom and flows uniformly through multiple vertically arranged filter elements (resembling candles) under pressure. The filter elements are covered with specialized filter cloth or other filtering media.
In the initial stage, solid particles in the liquid are intercepted by the filter cloth and gradually accumulate to form a dense filter cake layer. The micropores in the filter cake layer further block small impurities, making the filtrate clear and discharged through the internal channels of the filter cartridge.
Before forming an effective filter cake, the system may circulate the filtrate to the feed inlet to improve filtration efficiency.
2. Automatic reverse blowing slag discharge
When the thickening of the filter cake leads to an increase in filtration resistance (pressure difference reaches the set threshold, such as 150kPa), the system automatically triggers the blowback program:
Stop feeding and drain the remaining liquid;
Compressed air/inert gas is blown back from the inside of the filter element to cause the filter cake to fall off;
The bottom slag discharge valve is opened, and the filter cake is pushed out by reverse blowing force.
Automatically rebuild a new filter cake layer after slag discharge, achieving continuous filtration.
3. Auxiliary technology
For special materials such as high viscosity or easily clogged liquids, filter aids (diatomaceous earth, activated carbon) can be added to enhance the permeability of the filter cake.
Some designs support chemical cleaning or steam sterilization to thoroughly remove residues.
2、 Core Features
1. Efficient and energy-saving
The multi filter structure provides a large filtration area, strong processing capacity, and low energy consumption; The filter cake layer achieves high-precision filtration (up to micrometer level).
2. Fully automatic operation
Automatically control the filtration, blowback, and slag discharge processes based on pressure difference/time signals, reducing manual intervention; Some models support non-stop backwashing to ensure production continuity.
3. Sealed safety
The fully sealed structure prevents leakage and is suitable for toxic, high-risk, or sterile environments (such as pharmaceuticals and chemicals).
4. Easy to maintain
The filter element and filter cloth can be repeatedly cleaned and used, reducing the cost of consumables; Modular design facilitates quick maintenance.
5. Strong adaptability
Compatible with various viscosity and solid content liquids, especially adept at handling materials that are prone to clogging; The filter material (stainless steel/titanium/ceramic) and filter cloth (PP/PTFE, etc.) can be selected as needed.
6. Intelligent monitoring
Sensors monitor real-time parameters such as pressure, temperature, and flow rate, and support remote control and fault warning.
The automatic candle filter combines fine filtration of the filter cake layer with reverse blowing self-cleaning technology to achieve efficient, sealed, and low consumption solid-liquid separation. Its automated design greatly improves the reliability and economy of industrial production, especially suitable for fields that require precision filtration or continuous operations.