What are the advantages and disadvantages of baghouses? That friend knows

Baghouse is a common gas purification device, which uses a fiber bag filter to filter the exhaust gas, and traps the dust and particles in it on the surface of the bag, so as to achieve the purpose of purification. Its advantages and disadvantages are as follows:

Advantages: High dust removal efficiency: The dust removal efficiency of the bag filter can reach more than 99%, which can effectively filter out the fine particles and dust in the exhaust gas, and the purification effect is good.

Large flow rate of treated gas: The bag filter has a simple structure and a large flow rate of treated gas, which is suitable for large-scale industrial production sites.

Ease of operation and maintenance: Baghouses are chemical-free, relatively simple to operate and maintain, and easy to change and clean bags.

Disadvantages: Higher cost: Compared with other dust removal equipment, the cost of bag filter is higher and requires higher investment cost.

Large footprint: Because the bag filter requires more filter bags, it occupies a large area and needs to occupy a certain amount of space.

Easy to be blocked: If the treated exhaust gas contains more moisture, oil and other substances, it is easy to cause the filter bag to be blocked, which needs to be cleaned and replaced, which increases the maintenance cost.

Not suitable for high temperature and corrosive gases: The filter bags of bag filters are generally made of polyester, glass fiber and other materials, and are not suitable for the treatment of high temperature and corrosive gases.

The advantages and disadvantages of baghouses are as follows:

Advantages: The processing efficiency of granular materials is high, and the dust removal effect can reach more than 99%.

It is suitable for the treatment of high temperature, high humidity and corrosive gases, and can work normally in harsh industrial environments.

The operation and maintenance are relatively simple, and the cloth bag is easy to replace.

The cloth bag has a certain elasticity and flexibility, which can effectively prevent damage to equipment, crushing and other problems.

Disadvantages: The initial investment cost of the dust collector is high.

The cloth bag is easy to clog during use, needs to be cleaned, and the cycle is short.

After a long period of operation, the bag is easy to age, deform and wear, resulting in a decrease in dust removal efficiency.

For some special particulate materials (such as fibers, droplets, etc.), it cannot be effectively filtered.

The equipment occupies a large area.

In a word, the bag filter is a relatively common dust removal equipment, which has efficient and stable dust removal performance, but there are also some shortcomings, which need to be selected according to the specific situation.

Bag filters are the most widely used in many industrial sectors such as steel, non-ferrous metallurgy, chemical industry, machinery, building materials, electric power, light industry, textile, food, and transportation.

Baghouses have the following advantages:

1) The dust removal efficiency is very high, generally it can reach 99%, and it can capture fine dust particles with a particle size greater than microns, which can meet strict environmental protection requirements.

2) Stable performance. Changes in working conditions such as air volume, gas dust content, and temperature have little impact on the dust removal effect of the bag filter.

3) Easy dust disposal. The bag filter is a dry purification equipment that does not require water, so there is no sewage treatment or mud treatment problem, and the collected dust is easy to use.

4) Flexible use. The air volume can be from hundreds of cubic meters per hour to hundreds of thousands of cubic meters per hour, and can be used as a small unit directly located indoors and nearby, or it can be made into a large dust removal room.

5) The structure is relatively simple, the operation is relatively stable, the initial investment is less, and the maintenance is convenient.

But there are also some drawbacks to baghouses.

1) There is a limit to the ability to withstand temperature. Cotton and wool filter media can withstand temperatures of 80-95 degrees, synthetic fiber filter media can withstand temperatures of 200-260 degrees, and glass fiber filter media can withstand temperatures of 280 degrees. When purifying flue gases with higher temperatures, measures must be taken to reduce the temperature of the flue gases.

2) Some flue gas contains more moisture, or the dust carried has strong hygroscopicity, which often leads to the adhesion of the filter bag and the blockage of the filter material. In order to ensure the normal operation of the baghouse, necessary insulation measures must be taken to ensure that the moisture in the gas does not condense.

3) Some types of baghouse dust collectors have poor working conditions, and when inspecting and replacing the filter bags, they need to enter the box.

However, the advantages of the dust collector are high filtration accuracy, particulate matter emission standards, and stable operation. His shortcomings are: Decide to replace the filtered dust bag. The cost varies depending on the working conditions.

**Also different.

The advantage of baghouses is that they meet the particulate emission standards and can meet the stringent emission requirements. And the operation is relatively stable. His disadvantage is also obvious: we need to change the dust bag regularly, which is time-consuming and labor-intensive.

The advantages of baghouse are:

1) The dust removal efficiency is high, generally more than 99%, and the dust concentration of the outlet gas of the dust collector is within tens of mg m3, which has a high classification efficiency for fine dust with sub-micron particle size.

2) The range of air volume is wide, the small one is only 1 min m3, and the large one can reach 1 min tens of thousands of m3, which can be used for flue gas dust removal of industrial furnaces and kilns to reduce the emission of air pollutants.

3) Simple structure, easy maintenance and operation.

4) On the premise of ensuring the same high dust removal efficiency, the cost is lower than that of the electrostatic precipitator.

5) When using high-temperature resistant filter materials such as glass fiber, PTFE, P84, etc., it can operate under the condition of high temperature of more than 200.

6) It is not sensitive to the characteristics of dust, and is not affected by dust and resistance.

The cleaning effect is related to factors such as atmospheric pressure, dust collector construction, and whether the center line of the jet and the center line of the filter bag are consistent.

The disadvantages of the bag type dust collector: it is necessary to replace the filter bag, due to the variety of the filter material is less, the quality is not good, the sewing bag technology is not too good, and other reasons of the dust removal system, the filter bag life is short, especially in the filter bag at high temperature, under the condition of strong flue gas corrosiveness, some of the filter bags have to be replaced in just a few months, which increases the operating cost and maintenance workload, and brings inconvenience to the user.

In cold areas, condensation of water vapor in the compressed air will affect the injection effect, so it should not be placed outdoors.

Resistance is greater. Cooling measures must be taken for high-temperature gases.