What are the selection criteria for dust collectors used in plastic processing?

The selection criteria for plastic processing dust collectors mainly include the following aspects:

1. Dust removal efficiency

-Adaptability to dust particle size: The particle size distribution of dust generated during plastic processing may vary, for example, larger dust particles may be generated during the crushing process, while finer dust may be generated during some thermal processing processes. Plastic processing dust collectors should have good collection effects on dust of different particle sizes, especially for small particle sizes (such as sub micron dust), to ensure a high removal rate. Generally speaking, the dust removal efficiency should be above 95%, and for places with strict requirements, it may even need to reach over 99%.

-Adaptability to dust concentration: Different plastic processing techniques and production scales result in significant differences in dust concentration. Plastic processing dust collectors should be able to operate stably in high dust concentration environments and maintain high dust removal efficiency, avoiding problems such as decreased dust removal efficiency and equipment blockage caused by high dust concentration.

2. Handling air volume

-Meet production needs: Accurately calculate the required dust collector processing air volume based on the exhaust air volume of plastic processing equipment and the ventilation situation of the workshop. If the air volume is too low to collect and process the generated dust in a timely manner, it will cause dust to diffuse in the workshop; Dealing with high air volume may increase equipment investment and operating costs, and may also affect the ventilation effect of the workshop. Generally, a certain amount of air volume allowance should be reserved according to the specific process and equipment conditions, usually 10% -20%.

-Matching with fan: The processing air volume of the plastic processing dust collector should be matched with the matching fan to ensure that the fan can provide sufficient power to transport the dusty gas into the dust collector, and form a suitable airflow velocity inside the dust collector to ensure the dust removal effect. The parameters such as wind pressure and air volume of the fan should meet the requirements of the dust collector to avoid situations where the fan is overloaded or the air volume is insufficient.

3. Equipment material

-Corrosion resistance: During plastic processing, some corrosive gases or dust may be generated, such as the use of certain additives or acidic gases generated during plastic thermal processing. The material of plastic processing dust collectors should have good corrosion resistance, be able to resist the erosion of these corrosive substances, and extend the service life of the equipment.

-Wear resistance: During the transportation, crushing, and mixing of plastics, there may be some hard particles or fibrous substances that cause wear to the internal structure of the dust collector. Therefore, the filter bag, frame, shell and other components of plastic processing dust collectors should have a certain degree of wear resistance to ensure the long-term stable operation of the equipment.

-Anti static performance: Plastic dust is prone to static electricity during transportation and filtration. If static electricity cannot be eliminated in a timely manner, it may cause safety accidents such as fires or explosions. The material of plastic processing dust collectors should have good anti-static performance, or be equipped with corresponding static elimination devices such as grounding devices, static eliminators, etc.

4. Safety performance

-Explosion proof performance: Plastic dust may explode under certain concentrations and conditions, so plastic processing dust collectors should have good explosion-proof performance. For example, electrical equipment such as explosion-proof motors and explosion-proof control boxes should be used for the equipment; On the main structure of the dust collector, explosion-proof devices such as explosion-proof plates, explosion-proof doors, etc. should be installed. When an explosion occurs inside the equipment, the pressure can be released in a timely manner to avoid equipment damage and personnel injury.

-Fire resistance: The material of plastic processing dust collectors should have good fire resistance, be able to maintain stability in high temperature environments, and not burn or support combustion. At the same time, temperature monitoring and alarm devices should be installed inside the equipment. When the temperature exceeds the set safe value, an alarm should be issued in a timely manner and corresponding measures should be taken, such as stopping the machine, spraying water to cool down, etc.

5. Operational stability

-Rationality of structural design: The structural design of the dust collector should be reasonable, with uniform internal airflow distribution, to avoid situations where local airflow velocity is too fast or too slow, which may affect the dust removal effect. The installation method of the filter bag should be firm and reliable, easy to replace and maintain; The sealing of the equipment should be good to prevent dust leakage.

-Dust removal effect: Dust removal is an important part of ensuring the normal operation of the dust collector, and the quality of the dust removal effect directly affects the dust removal efficiency and service life of the dust collector. Common cleaning methods include pulse cleaning, mechanical vibration cleaning, and back blowing cleaning. It is recommended to choose a dust collector with good cleaning effect and moderate cleaning frequency according to the actual situation.

6. Maintenance and management convenience

-Easy to maintain: The dust collector should be easy to maintain and repair, and the structural design of the equipment should consider the operating space and maintenance channels for personnel, making it convenient to inspect, replace, and repair the internal components of the equipment. For example, the replacement of filter bags should be simple and quick, without the need for complex disassembly and installation processes.

-Low operation and maintenance costs: Choose a dust collector with low operation and maintenance costs, including equipment energy consumption, frequency and cost of replacing vulnerable parts such as filter bags, and equipment maintenance expenses. On the premise of meeting dust removal requirements, try to choose energy-saving equipment to reduce operating costs.