What is a dust collector bag cage? What is a dust filter bag?

The dust collector bag cage is a cylinder surrounded by a metal grid, and the two ends of the cylinder are open to communicate with the air duct. The dust collector bag cage uses the airflow pressure generated by the fan to press the dust-containing air to the surface of the dust collector bag cage, and most of the short linter and impurities are trapped on the surface of the dust collector bag cage. A filter fiber mesh layer is formed, and at the same time, the dust-laden air through the dust collector bag cage enters the second stage filter device through the channels on both sides of the dust collector bag cage.

The pre-separator can be seen as a type of filter bag cage filtration. The advantages of dust collector bag cage filtration are that there are fewer auxiliary equipment, simple and convenient management, and the filtered cotton basket has a higher reuse rate, and it is generally assembled into dust filtration equipment with other filtration methods. The disadvantage is that the processing air volume is not large, the area is relatively large, and the power consumption is more.

Bag filter is a kind of environmental protection equipment, and its role is air pollution control. Filter dust exhaust gases.

The bag type dust collector is mainly composed of the upper box (clean air chamber), the middle box (dust chamber), the ash hopper, the pulse cleaning system, the filter bag, the filter bag skeleton, the air inlet and outlet, the differential pressure gauge, the manhole, the ash discharge device, and the PLC controller.

Bag FilterIt is suitable for capturing fine, dry, non-fibrous dust. The filter bag is made of textile filter cloth or non-textile felt, and the dust-containing gas is filtered by the filtration effect of the fiber fabric, when the dust-containing gas enters the bag filter, the dust with large particles and specific gravity settles down due to the action of gravity and falls into the ash hopper, and the gas containing finer dust is blocked when passing through the filter material, so that the gas is purified.

Dust removal filter material is a kind of efficient dust removal filter materialThe dust filter bag is made of polyester staple fiber, PPS fiber, PP polypropylene, aramid fiber, Yilun fiber, etc., and the service life is generally 2-4 years, with good air permeability.

The dust removal rate can be reached. The dust removal filter bag is made of polyester staple fiber or long fiber as raw material, and the service life is generally 4-6 times that of glass fiber fabric, with good air permeability, high dust collection rate, ash capacity and dust removal efficiency.

The structure of the bag filter is mainly composed of the upper box, the middle box, the lower box (ash hopper), the ash cleaning system and the ash discharge mechanism.

In addition to the correct selection of filter bag materials, the cleaning system plays a decisive role in the performance of the bag filter. For this reason, the cleaning method is one of the characteristics that distinguish the baghouse, and it is also an important part of the operation of the baghouse.

A baghouse is a dry dust filtering device. It is suitable for the capture of fine, dry, non-fibrous dusts. The filter bag is made of textile filter cloth or non-woven felt, and the dust-containing gas is filtered by the filtration effect of the fiber fabric, when the dust-containing gas enters the bag filter, the dust with large particles and large specific gravity settles down due to the action of gravity and falls into the ash hopper, and the gas containing finer dust is blocked when passing through the filter material, so that the gas is purified.

Generally, the dust removal efficiency of the new filter media is not high enough. After the filter material is used for a period of time, due to the effects of sieve filtration, collision, retention, diffusion, static electricity, etc., a layer of dust accumulates on the surface of the filter bag, which is called the primary layer, and in the subsequent movement process, the initial layer becomes the main filter layer of the filter material, relying on the role of the primary layer, the filter material with larger mesh can also obtain higher filtration efficiency. With the accumulation of dust on the surface of the filter material, the efficiency and resistance of the dust collector increase accordingly, when the pressure difference between the two sides of the filter material is large, some fine dust particles that have been attached to the filter material will be squeezed over, so that the efficiency of the dust collector will decrease.

In addition, too high resistance of the dust collector will significantly reduce the air volume of the dust collection system. Therefore, after the resistance of the dust collector reaches a certain value, the ash should be cleaned in time. The initial layer can not be destroyed during ash cleaning, so as not to reduce the efficiency.

That's how baghouses work.

Hope it helps.

The bag filter is composed of a flower plate, a skeleton, a bag, a shell, a box, an ash hopper, an ash discharge device, a bracket, and a pulse ash cleaning system.

Working principle: When the dusty gas enters the dust collector from the air inlet, it first touches the oblique partition in the middle of the air inlet, and the air flow turns to flow into the ash hopper, and the air flow speed slows down at the same time, due to the inertia, the coarse particles of dust in the gas fall directly into the ash hopper, which plays the role of pre-dust collection. The air flow into the ash hopper then folds upwards through the filter bag equipped with a metal skeleton inside, and the purified gas collected by dust ** on the outer surface of the filter bag enters the clean room at the upper part of the filter bag chamber and is collected and discharged into the air outlet pipe.

Hello, the real estate company has the answer for you. The difference in the outer diameter between the dust collector bag cage and the cloth bag: it depends on the material of the cloth bag, if the cloth bag is a normal temperature dust removal cloth bag, both polyester needle felt, polyester needle felt, water repellent and oil-proof polyester needle felt, three-proof polyester needle felt, yellow medium temperature polyester needle felt, etc., the outer diameter of the dust removal skeleton and the inner diameter of the microphone hole need to be separated by 10mm gap; However, if the dust bag is made of fluoromex needle felt or glass fiber needle felt, the gap between the two must be less than 15mm; One reason is that the thickness of the dust bag is different.

The bag cage of the dust collector in the bag filter is equivalent to our ribs, which plays an extremely important role, and the size of the bag is just right, it does not hurt the bag, and there will be a good space between the pressure of a few kilograms of pressure sprayed and the dust bag when the pulse valve is sprayed, which can withstand repeated spraying tens of thousands of times.

I believe that many enterprises often encounter the phenomenon of cloth bags and paste bags in their own dust collectors, which is generally caused by these reasons, the composition of the flue gas is complex, the components of the flue gas contain oil, grease or other viscous substances, and the backflushing force can not chedi to remove the dust!

The filter bag is an important device of the whole dust collector, if the dust on the filter bag is not cleaned up, then the effect of the dust collector in the dust removal will be reduced, when the dust accumulates to a certain extent, it will not be able to achieve the effect of dust removal, and it will be automatically converted to the state of filtration, so that the running resistance of the equipment will become larger, so that the machine will go out of the load state, and the service life of the dust removal device will be reduced. If this is the reason, we need to increase the cleaning time and shorten the cleaning cycle. Second, when this bag filter is dealing with high temperature and high humidity gas, if the temperature change during operation is relatively large, it will produce condensation, so that the filter bag will be blocked after a long time, and the injected compressed air cannot be quickly removed, which will cause the occurrence of paste bag phenomenon.

Therefore, we should strictly control the temperature to prevent the phenomenon of exposure, and fundamentally solve the phenomenon of pasting bags. The third is that under normal circumstances, the bag filter is working under negative pressure, if the dust removal device leaks, it will suck in a large amount of air, increasing the resistance of operation, so we must choose a place that can not be welded when welding.

Why does the dust bag paste the bag, and how to solve it after the bag is pasted?

Please read the following article patiently and you will find the answer.

It doesn't matter much if it's pasted, and it's easy to solve.

The most important thing is: the temperature is not above 150 degrees, and the equipment is not insulated

The classification of bag filters is mainly as follows:

Mechanical vibration: bag filter dust collector that uses mechanical devices (including manual, electromagnetic or pneumatic devices) to vibrate the filter bag and clean the ash, and there are two types of bag dust collectors in the form of non-chamber structure suitable for gap work and chamber structure suitable for continuous work.

Compartment backflushing: a bag filter that adopts a chamber structure, uses a valve to switch the air flow chamber by chamber, and forces the filter bag to shrink or bulge and clean the ash under the action of reverse airflow.

Nozzle backblowing: a bag filter (all non-chamber structure) that uses a high-pressure fan or compressor to provide back-blowing airflow, and blows back-blowing through a moving nozzle to deform and shake the filter bag and penetrate the filter material to clean the ash.

Combined use of vibration and backblowing: bag dust collector (both chamber structures) used in combination of mechanical vibration (including electromagnetic vibration or pneumatic vibration) and backblowing two ash cleaning methods.

Pulse injection type: a bag dust collector that uses compressed air as the power to clean the ash, uses the pulse injection mechanism to release compressed air in an instant, induces several times the secondary air to inject into the filter bag at high speed, makes the filter bag bulge sharply, and cleans the ash by relying on impact vibration and reverse air flow.

Bag filter is a tool for industrial dust removal. It is also an indispensable equipment for industrial dust treatment. There are no alternatives yet.

The bag filter is directly sucked up by the air collection hood with dust, and transported to the bag filter through the pipeline, and the filtered dust through the bag is transferred to the ash hopper, and the clean air is discharged at 15 high altitudes.

Pulse jet bag filter is a dust collector with high dust removal efficiency, in the past, the way of mechanical vibration was used to clean the ash, and the bag wore out quickly, in order to overcome this shortcoming, the high-pressure gas was borrowed to blow the bag back, so that the bag could achieve the purpose of cleaning the ash. This kind of cloth bag can be divided into two types: one is to blow back with high-pressure gas; One is the air ring reverse blowing type, the filtration air speed of these two dust collectors is higher, the ash cleaning effect is better, and the work efficiency can reach 99%.

It is mainly used in dust removal and purification in various industries such as refractory materials, carbon plants, mine crushing, smelting and manufacturing.

Bag filter is a kind of purification and dust removal equipment that uses filter bags made of organic fibers or inorganic fibers to filter out the dust in the gas, which belongs to dry dust collectors. It is mainly in the body of the dust collector suspended a number of fiber fabric made of filter bags to filter dust-containing gas, with the thickening of the dust on the filter bag, the gas flow resistance increases, when the pressure reaches 1500pa, it is necessary to clean.

According to its filtration method, it can be divided into internal filtration and external filtration, and according to the dust cleaning method, it can be divided into mechanical rapping and compressed air impact type.

The advantages of the bag type dust collector are: high dust removal efficiency, up to, can capture a wide range of particle size, can be small, within the particle size, the capture efficiency is, its dust removal efficiency is not affected by the change of coal dust chemical composition, the efficiency is stable. When the resistance of the dust collector is below 1000Pa, even if the dust concentration at the inlet changes greatly, it has little impact on the resistance and efficiency of the dust collector.

The dust concentration range that the bag filter can adapt to can be from:

The disadvantages of the bag filter are: the life of the filter bag is short, and the cost of replacing the bag is high. When the bag is clogged with wet ash, eroded by high-speed airflow or deteriorates when the bag cannot withstand temperature changes, its service life will be reduced.