The cleaning method of cartridge dust collector needs to be "selected as needed" 

The cleaning method of cartridge dust collector needs to be designed around the characteristics of its cartridge "folded structure (large surface area, many pleats), dust is easy to accumulate in the gaps between pleats, and the filter membrane is easy to be damaged". 

The core goal is "efficient cleaning of dust in the pleats, avoiding filter cartridge damage, and adapting to different dust types".

 It is mainly divided into four mainstream methods and two auxiliary methods, which are suitable for all scenarios from "small single machine" to "large system". 

The specific methods are as follows: 

I. Four mainstream cleaning methods (core industrial applications) 

1. Pulse jet cleaning (most commonly used, suitable for more than 80% of scenarios)

 (1) Core principle Through 0.4-0.7MPa high pressure compressed air, it is instantly (0.1-0.3 seconds) sprayed into the inside of the filter cartridge through the pulse valve. 

By using "airflow impact + filter cartridge elastic deformation", 

the dust in the pleats is removed from the filter membrane and falls into the ash hopper. 

Based on the blowing direction and coverage area, pulse jets are divided into three categories: 

Right-angle pulse jet: The jet pipe is perpendicular to the filter cartridge axis, and the nozzle is aligned with the center of the filter cartridge (one nozzle corresponds to 1-2 filter cartridges), 

suitable for small single units (such as mobile welding fume collectors); 

Submerged pulse jet: The pulse valve is directly installed on the air tank at the top of the filter cartridge, with no airflow loss due to turning, covering the entire length of the filter cartridge, suitable for medium-sized systems (such as centralized dust removal in workshops); 

Rotary pulse jet: The nozzle rotates around the filter cartridge axis (speed 5-10 r/min), and the airflow evenly covers the gaps in the filter cartridge pleats, avoiding incomplete local dust removal, suitable for large systems (such as welding production lines and grinding workshops).

(2) Key Structures

Pulse valve (preferably a submerged pulse valve for fast response and uniform airflow), 

jet pipe (stainless steel material, nozzle orifice diameter matched to the filter cartridge diameter, such as a φ32 filter cartridge with a φ8 nozzle), 

compressed air degreasing dryer (to prevent oil/water from adhering to the filter membrane and causing blockage). 

(3) Suitable Applications: Applicable to almost all industries, especially suitable for high-concentration (≤50g/m³), dry/slightly sticky dust,

 such as metal grinding powder in small hardware factories, woodworking dust in furniture factories, and fly ash in power plants.

(4) Advantages and Disadvantages: Advantages: High dust removal efficiency (95%-99%, less dust residue in folds), 

long filter cartridge life (2-3 years, short impact time, minimal damage), suitable for continuous production (can be grouped for pulse-jet cleaning without stopping the machine); 

Disadvantages: Higher cost (30%-40% higher than mechanical vibration), requires compressed air (an additional air compressor is required in scenarios without an air source).

2. Reverse Air Cleaning (Gentle Cleaning, Longest Filter Cartridge Life)

(1) Core Principle: Utilizing a low-pressure, high-volume reverse airflow of 0.1-0.3MPa (blowing from the outside to the inside of the filter cartridge),

 the filter cartridge slightly contracts, and the dust on the pleated surface is peeled off through the "airflow pressure difference." 

This is suitable for scenarios where the filter membrane is "fragile and susceptible to impact" (such as PTFE membrane filter cartridges).

Airflow Source: Small systems use "natural wind reverse airflow" (closing the air intake of the filter cartridge chamber and using the internal and external pressure difference to draw air in); large systems use a "dedicated reverse air blower" 

(airflow is 1.2-1.5 times the processing airflow).

(2) Key Structures: Reverse air blower (low-pressure centrifugal fan, air pressure ≤3kPa), reverse air valve (pneumatic butterfly valve, controlling the airflow direction), guide plate (ensuring that the airflow evenly covers the filter cartridge pleats). 

(3) Suitable Scenarios: Dry, fine-particle, low-concentration dust (≤10g/m³), such as grain powder in grain processing, plastic powder in the chemical industry, and resin powder in electronics factories.

(4) Advantages and Disadvantages: Advantages: Gentle dust removal (no impact, filter cartridge life can reach 3-4 years), low energy consumption (backflow fan power is only 1/3 of that of pulse valve), 

simple maintenance (no easily damaged pulse valve); 

Disadvantages: Low dust removal efficiency (85%-90%, dust is easily retained in deep folds), not suitable for sticky dust (easily adheres to the filter membrane, and cannot be peeled off by reverse airflow).

3. Mechanical Vibration Cleaning (Simple and Low-Cost, Suitable Only for Small Equipment)

(1) Core Principle: A motor drives an eccentric wheel/vibration hammer to periodically vibrate the top or bottom of the filter cartridge (frequency 10-20 times/minute, amplitude 5-10mm), using mechanical vibration to remove dust from the filter cartridge.

Vibration Methods: Top vibration (suitable for vertical filter cartridges, vibration force is transmitted to the entire filter cartridge); Bottom vibration (suitable for horizontal filter cartridges, avoids filter cartridge deformation).

(2) Key Structures: Vibration motor (power 0.12-0.25kW), vibration hammer (rubber-coated cast iron hammer, reducing hard impact), filter cartridge support (strengthened rigidity, avoids vibration deformation).

(3) Suitable Scenarios: Ultra-small single unit, low-concentration dry dust (≤5g/m³), such as desktop grinding dust collectors, small laboratory dust collection equipment. (4) Advantages and Disadvantages

Advantages: Simple structure (no complex air/circuit components), low cost (50% lower than pulse cleaning), no need for compressed air;

Disadvantages: Significant filter cartridge damage (rapid cleaning easily leads to filter membrane rupture and pleat deformation, with a lifespan of only 1-1.5 years), 

incomplete cleaning (dust deep in the pleats cannot be shaken off), unsuitable for continuous production (filtration must be paused during rapping, otherwise dust will be re-entrained).

4. Pulse + Reverse Air Combination Cleaning (Specifically for High-Viscosity/High-Concentration Dust)

(1) Core Principle

For high-viscosity (such as oil mist dust) and high-concentration (≥50g/m³) dust, the sticky dust layer on the surface of the filter cartridge pleats is first loosened by "low-pressure reverse air," 

and then the deep dust is peeled off by "high-pressure pulse jet cleaning," forming a highly efficient "loosen then peel" cleaning process, avoiding incomplete cleaning or damage to the filter cartridge by a single method. (2) Key Logic

Back-blowing stage (1-2 seconds): Low-pressure airflow (0.2MPa) blows, breaking the adhesion between dust and the filter membrane;

Pulse jet blowing stage (0.2 seconds): High-pressure airflow (0.6MPa) jets, shaking off residual dust in the pleats;

Settling stage (3-5 seconds): Airflow is shut off, and dust naturally falls into the dust hopper, avoiding secondary re-entrainment.

(3) Applicable Scenarios

Small hardware factory cutting oil mist dust, auto repair shop paint booth dust, food factory sugar-containing sticky dust.

(4) Advantages and Disadvantages

Advantages: High dust removal efficiency (over 98%, suitable for highly sticky dust), long filter cartridge life (2-3 years, back-blowing loosens dust first, reducing pulse impact);

Disadvantages: Complex structure (requires simultaneous configuration of back-blowing and pulse systems), high cost (20%-30% higher than single pulse cleaning).

II. Two Types of Auxiliary Dust Removal Methods (Supplement for Special Scenarios)

1. Acoustic Wave Assisted Dust Removal (Enhancing the Efficiency of Sticky Dust)

(1) Core Principle: A low-frequency acoustic wave generator (20-200Hz) generates vibration energy, which acts on the filter cartridge pleats, loosening sticky dust (such as paint powder and resin powder). This is then combined with pulse jet cleaning or reverse air blowing to remove the dust. 

The dust removal efficiency is only 30%-40% when used alone and needs to be combined with mainstream methods.

(2) Suitable Scenarios: Highly sticky, easily agglomerated dust, such as epoxy resin powder in the chemical industry and paint dust in furniture factories.

(3) Key Design: The acoustic wave generator is installed on the top of the filter cartridge chamber, with one generator for every 2-3 filter cartridges. The acoustic wave coverage range is ≥1.5m. 

The acoustic wave action time is synchronized with the dust removal cycle (e.g., the acoustic wave is activated 1 second before pulse jet cleaning and lasts for 2 seconds). 2. Online/Offline Dust Removal (Suitable for System Size)

(1) Online Dust Removal

Principle: During dust removal, the air intake of the filter chamber is not shut off. Only a portion of the filter cartridges (e.g., 1/3 group) are cleaned, while the other cartridges filter normally. 

Suitable for small systems (processing air volume ≤ 10000m³/h), such as single-unit dust removal in workshops;

Advantages: No need to stop the machine, does not affect production; Disadvantages: Dust is easily mixed into the clean airflow during dust removal, resulting in slightly lower efficiency (5%-10% lower than offline). (2) Offline dust removal

Principle: The filter cartridge is divided into multiple independent filter chambers. During dust removal, the air inlet/exhaust valve of a single filter chamber is closed (offline state), and then pulse/back-flushing dust removal is performed. 

Other filter chambers filter normally. It is suitable for large systems (processing air volume ≥ 10000m³/h), such as welding production lines and large-scale mining crushing and dust removal.

Advantages: Thorough dust removal (no airflow interference, high dust settling rate), suitable for high-concentration dust; Disadvantages: Complex structure (requires multiple valves), high cost.