What is the dust holding capacity of the filter, and what parameters are related to the dust holding

The dust holding capacity of the filter refers to the maximum allowable dust accumulation of the filter, when the dust accumulation exceeds this value, the filter resistance will become larger, and the filtration efficiency will decrease. Therefore, the dust holding capacity of the general filter refers to the amount of dust accumulation when the resistance reaches the specified value (generally 2 times of the initial resistance) due to dust accumulation under the action of a certain air volume.

The increase in resistance after dust accumulation in the filter is related to the size of the solid dust particles. After the dust is deposited on the filter, the effect on its efficiency is very complex, and at a certain wind speed, it depends on the nature of the filter material, the nature and size of the dust particles. For example, the filter made up of general fiber material, because the filter material accumulates dust, increases the contact resistance retention effect of the filter, and also can make other dust particles accumulate on the dust particles that have been retained because of the charge effect of dust particles, thereby improving the filtration efficiency of the filter; However, when the dust accumulates to a certain limit, the accumulated dust will scatter, or the filter material will be broken down due to the excessive pressure difference between the two sides of the filter material, resulting in a serious decline in filter efficiency.

The dust-holding capacity of a filter refers to the total amount of dust particles that can be filtered, also known as dust capacity. When the dust particles in the air exceed the dust holding capacity of the filter, the filter loses its effectiveness and needs to be cleaned or replaced. The dust-holding capacity of the filter is usually listed by the manufacturer in the product description.

1. The dust holding capacity of the air filter is related to the service life of the filter. If the filter is working at an airflow volume that exceeds the rated airflow, its resistance will increase faster as the dust collection increases.

2. The dust holding capacity of the air filter bypass cleaner is related to the size of the solid dust per mu of smart particles. After the dust is deposited on the filter, the effect on its efficiency is very complex, and at a certain wind speed, it depends on the nature of the filter material, the nature and size of the dust particles.

The dust holding capacity of the baghouse air filter varies according to different models, materials and specifications, and is generally calculated based on the filter area. The following are the dust holding capacity ranges of some common baghouse dust bush argument air filters:

The bag filter with a filtration area of 50 square meters has an approximate dust holding capacity of 10-12kg.

The bag filter with a filtration area of 100 square meters has a dust holding capacity of about 20-25kg.

The bag filter with a filtration area of 150 square meters has a dust holding capacity of about 30-35kg.

It should be noted that the dust holding capacity of the bag dust removal air filter is not a definite value, it is affected by a variety of factors, such as differential pressure, wind speed, smoke and dust properties, etc., and the dust holding capacity will gradually increase over time. Therefore, when using a baghouse, it is necessary to regularly check and clean the filter to ensure its normal operation and efficient dust removal.

At the same time, when the dust holding capacity of the air filter of the bag filter reaches a certain level, the filter needs to be replaced or cleaned to avoid problems such as excessive resistance of the filter delayer, damage to the equipment or affect the dust removal effect. The specific replacement or cleaning cycle needs to be determined according to the specific situation, such as the use environment, working intensity, and dust concentration of the bag filter.

There are two main types of dust collectors, and their filtration area calculation methods are as follows:

1. Calculation of the net filtration area of the cyclone dust collector and the dust collector an=q (60*VN) where: an: the net filtration area of the dust collector.

Q: Amount of gas processed (m h).

vn: net filtration air speed (m min).

The net filtration area of the dust collector is calculated based on the amount of gas processed. The net filtration air speed and net filtration area refer to the infiltration of the filter wind speed and filtration area of the dust collector when the filtration is stopped for ash cleaning in a certain chamber.

2. Bag dust collector, calculated according to the bag area s=

s: the total area of the filter.

S1: The area of each bag.

n: The number of cloth bags.

There are two main types of dust collectors, and their filtration area calculation methods are as follows:

1. Calculation of the net filtration area of the cyclone dust collector and the dust collector an=q (60*VN) where: an: the net filtration area of the dust collector.

Q: Amount of gas processed (m h).

vn: net filtration air speed (m min).

The net filtration area of the dust collector is calculated based on the amount of gas processed. The net filtration air speed and net filtration area refer to the filtration wind speed and filtration area of the dust collector when a certain chamber stops filtering for ash cleaning.

2. Bag dust collector, calculated according to the bag area s=

s: the total area of the filter.

S1: The area of each bag.

n: The number of cloth bags.

Calculation method of the filtration area of the bag filter.

The calculation method of the filtration area of the bag filter is as follows in the ventilation and dust removal design manual: a=l 3600v a-filtration area m2 l-treated air volume, m3 h v-filter wind speed, m s adopted.

Filtration area: l=3600V a V unit (m s) l=60v a v unit (m min) Generally, the filtration air speed is measured in m min.

Filtration area = air volume (60 * filter air speed). For example, the air volume is 10000m3 h; Filtration wind speed 2m min; Filtration area = 10000 (60*2) = square meters.

How to calculate the filtration area of the dust collector Know the diameter of the height.

In general, the overlapping edges of the sewing are about 1 to 2 cm d*

The length should take into account the flange of the mouth part and add 10cm

The area of each bag s x the number of bags in the dust collector n i.e.: s = bottom area + bottom circumference multiplied by height = filter area.

How to calculate the air volume of the bag filter.

When calculating the processing gas of the bag filter, the amount of gas under working conditions is first required, that is, the amount of gas actually passing through the bag filter, and the air leakage of the dust collector itself is also considered. These data should be determined according to the actual operation experience or test data of the existing plant, and if the necessary data are lacking, they can be calculated according to the amount of gas produced in the production process, and then increase the amount of air mixed into the gas collection hood (about 20% 40%). The size of the filter air speed depends on the characteristics of the dust-containing gas, the type of fabric and the nature of the dust, and is generally selected according to the recommended data of the dust removal equipment sample and the user's practical experience.

According to the total air volume and predetermined filtration speed through the baghouse, the total filtration area is calculated according to the following formula: after the total filtration area is found, the overall size and size of the baghouse can be determined. 2. Area of a single dust removal bag:

The area of a single round cloth bag, in the process of bag processing, because the bag should be fixed on the flower board or short pipe, and some should be hung up and fixed on the bag cap, so the two ends of the bag need to be double-layer sewn or even multi-layer sewn: this part of the double-layer sewing has no filtering effect due to the increase of resistance, and at the same time, some cloth bags have to fix the ring in the middle, and this part has no filtering effect. In the large and medium-sized reverse blowing bag dust collector, the bag is 10m long and diameter, and its nominal filtration area is; If the area without filtration is deducted, its net filtration area is determined by.

There are two main types of dust collectors, one is the bag filter, the other is the cyclone dust collector, and the most commonly used is the bag filter.

How to calculate the filtration area of a bag filter?

When choosing a bag filter, users want to choose a high-performance dust collector equipment, but when choosing, they must consider the relevant technical parameters of the bag filter, such as: How is the filtration area of the bag filter calculated?

1. S- total filtration area m2;

s1— Filtration area m2 of the working part of the filter bag;

s2— the filtration area of the ash cleaning part of the filter bag m2;

q — total volume of gas passing through the dust collector m3 h;

Based on the total air volume passing through the dust collector and the limited filtration speed, the total filtration area is calculated as follows. Once the total filtration area has been calculated, the overall size and size of the baghouse can be determined.

2. Area of a single round filter bag:

SD — Nominal area m2 of a single round filter bag;

d — Filter bag diameter m;

l — Length of filter bag m;

In the process of filter bag processing, because the filter bag should be fixed on the flower plate or short pipe, and some should be hung up and fixed on the bag cap, therefore, the two ends of the filter bag need to be double-layer sewn or even multi-layer sewn: this part of the double-layer sewing has no filtration effect because of the increased resistance, and at the same time, some filter bags have to add a fixed ring in the middle, and this part has no filtering effect, in the large and medium-sized back-blowing air dust collector, the filter bag is 10m long, and the diameter is :, and the formula filtration area is, if the area without filtration is excluded, the net filtration area is by; It can be seen that the area of the filter cloth without filtration on the filter bag accounts for 5%-10% of the filter bag area, so the size of the net filtration area should be indicated in the specifications of large and medium-sized dust collectors.

However, in the existing dust collector samples, most of the filtration area refers to the nominal filtration area, which should be paid attention to in the design and selection.

3. Number of filter bags:

After calculating the total filtration area and the filtration area of a single filter bag, the number of filter bags can be calculated. If the number of filter bags per bag chamber is determined, the number of chambers for the entire collector can also be calculated. Although the number of rooms is determined according to the needs in the design or selection of the dust collector, from the perspective of site layout and maintenance, the number of rooms of the dust collector with more than 6 rooms is often set as double row.

Each chamber of a dust collector with less than 5 chambers is designated as a single row.

The calculation method of the filtration area of the bag filter is explained in the dust collection design manual as follows:

Filtration area = air volume (60 * filter air speed).

For example, the air volume of the bag filter is 10000m 3 h; The filtration air speed is 2m min; Filtration area = 10000 (60*2) = square meters.

The filtration effect of the dust removal filter cartridge has a lot to do with the filtration area, so how to calculate the filtration area of the dust removal filter cartridge? Let Xiaoyang Machinery tell you.

The filtered area can be filtered according to the formula:a=l×2×n×mto calculate.

The filtration area can be represented by a in the formula in m; l represents the fold depth of the filter paper, in m; n represents the fold; m is the effective height of the dust removal filter cartridge. For example, the effective height of a commonly used dust removal filter cartridge is m=, the fold depth is l=, and the fold is n=150, then the filtration area of the filter cartridge isa=, and the effective filtration area of the cartridge is calculated to be .

Dust collector cartridge filter area selection tips:

For the environment with high inlet dust concentration, it is recommended that the filtration area of the dust removal filter cartridge be smaller, so that the cleaning effect of the filter cartridge is better, and the filter cartridge can be achieved by reducing the number of folds and folding depth when making the cartridge. Generally, the air speed of the filter cartridge dust collector is, of course, the most ideal filter air speed should be, where the filter air speed refers to the average speed at which the gas passes through the filter material. If the dust concentration is high, you can consider reducing the filtration air velocity, which can improve the filtration efficiency of the dust collector, reduce the working resistance, thereby improving the ventilation performance and making the service life of the filter cartridge longer.

Let everyone have a simple understanding of the definition of the filter cartridge filtration area, mainly to help you be more targeted when choosing the filter cartridge elements, different filter materials also have different requirements for the filter cartridge, you should make a distinction before purchasing.

Dust filter product features:

1. The fiber has strong toughness, and the structure is increasing, and the filtration performance is good.

2. Synthetic fibers are used, and the filter material contains electrostatic fibers, with high trapping power, good air permeability and low resistance.

3. The temperature resistance is up to 80, the humidity resistance is strong, and the humidity resistance of relative humidity can be reached.

4. Silicone-free, specially designed to be suitable for painting workshops.

5. Adopt large seam fusion, efficient and reliable operation.

6. Capture 1 5um of particle dust and various suspended solids.

7. Large dust holding capacity, large air volume, low resistance, high efficiency filter, pre-filter, intermediate filtration of air conditioning system.

Air purification and filtration in electronics, precision instruments, machinery, metallurgy, chemical training, textiles, food and other industries.