What Is an Industrial Dust Collector?

Industrial dust collector is a kind of air pollution control equipment used in factories, workshops, warehouses and other industrial or commercial places to meet the safety requirements of the environment and workplaces. An effective dust collection system controls, reduces and removes potentially harmful particles and smoke in the gas or air and the surrounding environment during the production process. This equipment is specially used to purify and filter harmful dust and fine particulate pollutants released into the working environment or the atmosphere to maintain and improve air quality.

The types of pollutants vary from industry to industry. Therefore, the industrial dust collector is designed for the extraction method required by each industry. The working principle of the dust collection system is generally to suck dust and particles in the air through a filter. The filter first captures and separates the substances, and then discharges the purified air back to the workplace or the environment. The goal of each design application is essentially the same-filter, separate and capture dust and particulate matter, and release purified air.

The basic components of the dust collector include a blower, a dust filter, a dust collector cleaning system, a dust collector and a dust removal system. Five common types of dust removal equipment are fabric filter baghouses, inertial separator (such as mechanical cyclone), drum collector, wet scrubber and electrostatic precipitator.

Bag filters come in various designs and are the most commonly used system due to their 99% efficiency.

Dust collection is vital to many industrial sectors such as woodworking, agriculture, food processing, pharmaceuticals, recycling, cement and rock products, metal manufacturing, mining and chemical processing. Dust collectors called filter receivers are an important part of the processing system, used in many thermal and downsizing applications and as receivers for pneumatic conveying.

Pulse jet dust collector is another bag type dust collector system, in order to meet the needs of industrial applications, a variety of designs are used. The bag cleaning system is cleaned by a rapid, high-pressure air jet, sending shock waves or impacts through the bag, crushing and discharging the dust cake for processing. The rapid pulsation of air allows the fan to run continuously, so the system is generally not divided. Pulse jet models are the most common type of industrial dust collector because of their ability to be easily customized, their ability to handle a wide range of temperatures and pressures, and their high collection efficiency.

The cyclone dust collector is an inertial separator that separates dust from the airflow by centrifugal force. By generating a cyclone in the cyclone collection chamber, the air is purified. An intense circular airflow resembling a vortex pushes dust particles to the wall of the cyclone separator, and then slides to the bottom of the hopper for collection. The cyclone system can remove heavier and larger particles mixed with fine dust. They are often used as pre-cleaners before the baghouse.

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What Is Bag Filter

After the bag filter is maintained and installed and used for 1-2 months, the bag will become longer. After the bag becomes slack, on the one hand, it is easy to be in contact with the adjacent cloth bag to be worn, and on the other hand, in the slack part, the cloth bag generates holes due to dust accumulation and friction. In addition, due to the disappearance of the pulling force, the cleaning effect is degraded, and clogging of the bag mesh occurs. Therefore, check the equipment 1-2 months after installation and adjust the tension. Although the spring-type bag filter may not need to be adjusted, it should be checked frequently. After one year of operation, replace the inappropriate spring.

The bag filter is a dry dust filter device, suitable for collecting fine, dry, non-fibrous dust.

Ancillary equipment pipes and dust hoods are important ancillary equipment, which can be easily communicated in the early stage of operation; judging by abnormal vibration, poor suction, and poor operation.

bag dust collector

There are two kinds of mine dust collectors: wet dust collectors and dry dust collectors. Wet dust collectors have the disadvantage of secondary pollution and are inconvenient to manage. Especially the characteristics of easy freezing of water in winter have become a major disadvantage; dry dust collectors The device is easy to operate, easy to maintain, and has a high dust collection rate.

At the beginning of operation, pay attention to whether the exhaust fan is reversed, and lubricate the fan in time. Although most fans are equipped with automatic starting devices to reduce accidents, the bag dust collector is maintained but there is no automatic start. Because the fuse of the power supply is blown after the start failure, the motor runs in single phase, and the burnout accident occurs from the beginning of the operation.

In addition, the rapid change of gas temperature and the maintenance of bag dust collectors also have an adverse effect on the fan, and this situation should be avoided. Because the temperature change may cause the fan shaft to change, forming an unbalanced state of operation, causing vibration. Moreover, when the operation is stopped, if the temperature drops sharply, there is a risk of vibration when it is restarted.

The starting of the equipment plays an important role in normal operation, observe carefully and act with caution.

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What Is a Screw Conveyor

A screw conveyor or auger conveyor is a mechanism that uses a rotating screw, called "flighting", installed in a tube or trough to move liquid or granular materials. They are used in many bulk cargo handling industries. Screw conveyors are often used horizontally or slightly inclined in modern industry as an effective way to move semi-solid materials, including food waste, wood chips, aggregates, grains, animal feed, boiler ash, meat and bone meal, and municipal solid waste and many others. The first form of screw conveyor is Archimedes' screw, which has been used to pump irrigation water since ancient times.

They usually consist of a slot or tube containing a helical blade around a shaft, driven at one end, and called a solid shaft screw at the other end. Other types are open screw or shaftless screw drive at one end and free at the other end. The volume transfer rate is proportional to the speed of the shaft. In industrial control applications, the device is usually used as a variable rate feeder, changing the rotation rate of the shaft to feed the measured rate or amount of material into a process.

When space permits, the use of inclined screw conveyors is a very economical method of lifting and conveying materials. When the inclination angle increases, the capacity of a given unit decreases rapidly. The general rule of thumb is 45 degrees or less, otherwise the material will eventually fall backwards over the flight and not convey to reach the intended destination.

Some of its advantages are:

The screw conveyor can handle all kinds of bulk materials from slow to free flowing.

The screw conveyor can have multiple inlet and outlet points. Bulk materials can be transported and distributed to different locations as needed. Sliding gates or valves can be used to control the flow into and out of the screw conveyor.

When a screw conveyor is used as a metering device, it is considered a screw feeder. The screw feeder is used to start a material process to meter the product from the silo or hopper.

The screw conveyor is very compact and suitable for crowded locations. Screw conveyors have no return similar to belt or drag conveyors.

The screw conveyor is completely enclosed to contain the product and prevent spillage. Screw conveyor can be used in horizontal, vertical or any inclined position depending on the situation

Screw conveyors can be used to mix various products together and crush large pieces.

Screw conveyors can be used to cool, heat or dry products in transit. According to the heat transfer requirements, the screw conveyor can be jacketed or hollow flight design to provide the necessary heat transfer for the application.

Screw conveyors can be designed to be steam tight or to maintain internal pressure. This is very important when transporting toxic or dangerous products, such as those in the chemical industry.

Screw conveyors can provide an air lock between upstream and downstream equipment.

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