How to Choose a Dust Collector How to Choose the Right Dust Collector

1.First, identify the process that needs to be treated; (There are many forms of dust collectors, and how to choose the form of dust collector more reasonably mainly depends on the specific process).

2.determine the nature of the dust; The main dust substances are; whether the dust contains acidity and alkalinity; (So as to determine the selection of filter media; The filtration wind speed of the filter material is different according to the different dusts, and the filtration wind speed of the same kind of filter material is different; According to whether the dust contains pH to choose the material of the equipment, generally the pH value is 6-8 carbon steel material, greater than 8 or less than 6 generally use SUS304).

3.Determine the magnitude of the air volume; (The filtration area of the filter material is calculated by the size of the air volume and the filtration air speed of the dust, so as to select the model of the equipment).

4.Calculate the pressure loss of the pipeline (SP total = SP main pipe + SP branch pipe + SP reducer + SP elbow + SP suction hood + SP dust collector; Among them, the design of the suction hood is very important, and the pressure loss of the dust collector: the pressure loss of the filter cartridge dust collector and the bag dust collector is 1200-1500pa, and the self-pressure of the wet dust removal is 1500-1800pa) The selection of the fan and motor is mainly calculated by the pressure parameters and air volume parameters.

The above four points are the basic parameters for the selection of dust collectors.

What form of dust collector? If it is a bag type, according to GB T6719-2009 "Technical Requirements for Bag Dust Collector".

Take a look at what is used. If it is for home use, you can choose a smaller one, which is effortless and easy to use. If it is commercial or a villa, even if you choose a barrel type.

Personally, I recommend Delmar's dry and wet blowing three-purpose vacuum cleaner, which can suck almost anything, and is equipped with a variety of cleaning accessories, which can absorb the liquid and dust on the ground, and change the other head to suck curtains and sofas, which is very convenient. Some vacuum cleaners are smart and can't suck liquids, so it's not recommended and will be more troublesome.

The bag filter used on the boiler must be installed, Mars trap, Mars separator, or it will definitely burn the bag.

The selection of dust collector must comprehensively consider factors such as dust removal efficiency, pressure loss, one-time investment, and maintenance management. At the same time, special attention should be paid to the following issues.

1) The selected dust collector must meet the emission concentration specified in the emission standard. (2) The physical properties of dust have a great impact on the performance of the dust collector.

3) The dust concentration of the gas. When the dust concentration of the gas is high, a low-resistance primary purification equipment should be set up in front of the electrostatic precipitator or bag filter to remove coarse dust particles.

4) Gas temperature and other properties are also factors that must be considered when choosing dust removal equipment. High temperature and high humidity gas should not use bag filter. The flue gas also contains gaseous pollutants such as SO2 and NO, so a wet dust collector can be considered, but corrosion must be paid attention to.

5) When selecting a dust collector, the treatment of the captured dust must be considered at the same time.

6) Other factors.

the location of the equipment, the available space, the environmental conditions;

One-time investment in equipment (equipment, installation and engineering, etc.) as well as operating and maintenance costs.

1. According to the amount of gas processed.

If you want to deal with a large amount of gas, try to choose a dust collector that can handle a large amount of gas, and it is often uneconomical to use multiple dust collectors to deal with a small amount of gas in parallel; For small gas volumes, it is the most economical and easiest to use a dust collector with a small air volume, and it is also the easiest to meet the control of dust source points and dust emission to meet environmental protection requirements.

2. According to the dispersion and density of dust.

The dispersion of dust has a great impact on the performance of the dust collector, and the dispersion of dust is the same, but there are differences under different operating conditions. Electrostatic precipitators and bag filters should be selected. The specific modification family selection can be preliminarily selected according to the dispersion degree and other requirements, referring to the common dust collector type and performance table.

3. According to the dust concentration of the gas.

For nuclear deficit gravity, inertial and cyclone dust collectors, generally speaking, the larger the dust concentration at the inlet, the higher the dust removal efficiency. At higher initial concentrations, continuous cleaning is carried out, and the pressure loss and discharge concentration can also meet the environmental requirements.

According to the principle of action, dust collectors can be divided into the following types:

1. Dry mechanical dust collector mainly refers to the dust removal equipment designed by the application of dust inertia and gravity, such as high-concentration dust collectors such as settling chambers, inert dust collectors, cyclone dust collectors, etc., which are mainly used for the separation or concentration of high-concentration coarse particle size dust.

2. Wet dust collectors rely on hydraulic affinity to separate and capture dust particles, such as spray towers, scrubbers, impact dust collectors, venturi tubes, etc., which are used more in the treatment of dusty gases with high concentration and large air volume in the process of treatment. The separation efficiency of coarse, hydrophilic dust is higher than that of dry mechanical dust collectors.

3. The particle layer dust collector uses the granular material accumulation layer of different particle sizes as the filter material to block and filter the dust contained in the air dissolution. It is mainly used in the dust removal point in the production process of building materials and metallurgy, and is often used to filter dusty flue gas with high concentration, coarse particles and high temperature.

4. Bag dust collector, the filter is a dust removal device with fiber weaving or filling layer as the filter medium, and its use, form, dust removal air volume scale and function efficiency have a wide range in all aspects, mainly used in the place of collecting fine dust, that is, it is applied in the exhaust dust removal system and the air intake system. In recent years, due to the continuous development of new filter media, the development of fiber filtration technology has also accelerated, new products continue to appear, and the application field has been increasingly expanded.

5. The electrostatic precipitator is to introduce the dust-containing air flow into the electrostatic field, under the action of the high-voltage electric field, the gas is ionized, electrons and positive ions are generated, they move to the positive and negative poles respectively, when the dust particles are negatively charged when flowing through the working electric field, they move to the sedimentation plate opposite to the sign of their negative charge at a certain speed, and settle down there, so as to break away from the air flow and be collected in the electrostatic precipitator. This kind of dust collector has high dust removal efficiency, low resistance, and easy maintenance and management. It is similar to baghouse in capturing fine dust particles.

There are mainly the following classifications:

1. Mechanical dust removal equipment: mechanical dust removal equipment includes gravity dust removal equipment, centrifugal dust removal equipment and inertial dust removal equipment.

2. Washing dust removal equipment: washing dust removal equipment includes water bath dust removal equipment, foam dust removal equipment, venturi dust removal equipment, water film dust removal equipment, etc.

3. Filtered dust removal equipment: The dust removal mechanism of the filtering dust removal equipment is similar to that of a mask, which is achieved by the mechanical interception of fly ash particles in the air by the filter material, and the fly ash particles received first form a viscous and stable ash layer on the surface of the filter material, which is called filter cake or bed, which plays a good role in filtration.

4. Electrostatic precipitator equipment: The working principle of electrostatic precipitator equipment is that when the flue gas passes through the flue in front of the main structure of the electrostatic precipitator equipment, the smoke and dust will be positively charged, and then the flue gas will enter the channel of the electrostatic precipitator equipment with multi-layer cathode plates.

5. Magnetic dust removal equipment: The principle of magnetic dust removal equipment is to use conductive coils to generate magnetic fields and adsorb magnetic particles, which are mainly used for industrial waste gases such as steel.

The dust collector is the equipment that separates the dust from the flue gas, if it is used in industry, the electric bag composite dust collector is better.

Generally, there are three types of bag dust collectors, filter cartridge dust collectors, and cyclone dust collectors.

Hello, there are bag dust collectors, electrostatic precipitators, wet electrostatic precipitators, electric tar precipitators, Hebei Beijing dust removal, thank you.

Aunason Environmental Protection is a domestic company that makes dust collector equipment. Committed to passing the environmental impact assessment of enterprises.

Dust collector equipment:

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.

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 in industrial furnaces and kilns to reduce the emission of air pollutants.

The structure is simple, and the maintenance and operation are convenient.

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

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

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

Personal suggestion: In this regard, I suggest you look for manufacturers in the Kunshan area, Aunason Environmental Protection Company focuses on waste gas treatment and provides one-stop solutions, you can consider it.

1. Bag type dust collector.

The dust removal efficiency is high, and the efficiency of fine dust can reach more than 99%.

It is not suitable to purify dusty gases containing oil mist, condensate and dust with large adhesion, as well as flue gases that are dangerous or have sparks.

When the dust concentration is greater than 10g m3, it is advisable to add a pre-purification dust collector.

The recommended flow rate for baghouses is as follows:

The main properties of various fibers are shown in the table.

The baghouse is a dry and high-efficiency dust collector that uses the filtration action of a porous bag-shaped filter element for dust removal. Because it has the advantages of high dust removal efficiency (for dust, the efficiency is as high as 98% 99%), strong adaptability, flexible use, simple structure, stable operation, easy dust, simple maintenance and so on. Therefore, bag filters are widely used in different industrial sectors such as metallurgy, chemistry, ceramics, cement, food, etc., and are the most competitive dust removal equipment among various high-efficiency dust collectors.

The working principle of the bag filter: the mesh of the filter material used in the bag filter is large, generally 20 50um, and the surface fluffing filter material is about 5 10um. Therefore, the dust removal efficiency of the new filter bag is only about 40% (1um dust).

When the dust-laden air passes through the filter material, due to the action of fiber screening, interception, collision, diffusion and static electricity, the dust is retained on the filter material to form a primary layer.

Compared with the filter media, the porous initial layer has a higher dust removal efficiency. Therefore, the filtration function of the baghouse mainly relies on this initial layer and the dust layer that gradually accumulates later. As the dust layer thickens, the pressure difference between the two sides of the filter bag becomes larger, which increases the resistance loss of the dust collector and reduces the amount of gas processed.

At the same time, due to the acceleration of the speed of air passing through the pores of the filter material, the dust removal efficiency is reduced.

Therefore, after the dust collector runs for a period of time, the dust is cleaned to remove the dust layer, but the initial layer is not damaged, so as not to reduce the efficiency.

2. Filter cartridge dust collector.

The cartridge is sub-micron filtered to create a clean space.

Automated off-line cleaning.

Local collection, local processing.

Convenient operation and maintenance.

It is suitable for the collection of dust from a variety of independent or multiple dust generation points.

The working principle of the filter cartridge dust collector: after the fan is opened, the dusty air enters the box from the dust source through the dust removal cover, air duct and air inlet, due to the sudden expansion of the air flow, the flow rate decreases suddenly, and the large particles are separated from the dusty air by the powder under its own weight and sinks into the ash drawer, and the rest of the dust particles are retained on the outer wall of the filter element due to the role of screening, collision, hooking, static electricity, etc., and the purified air is discharged from the outlet through the fan.

For wet precipitators, electrostatic precipitators can also be used in the dust collection system of pharmaceutical factories, but they are rarely used in actual production. Therefore, for the dust removal system of pharmaceutical factories, the above two dust collectors are commonly used.

Dust collectors are divided into the following five categories according to their principle of action:

1) Mechanical dust collectors include gravity dust collectors, inertial dust collectors, centrifugal dust collectors, etc.;

2) Washing dust collectors include water bath dust collectors, foam dust collectors, venturi dust collectors, water film dust collectors, etc.; (3) Filter-type dust collectors include bag dust collectors and particle layer dust collectors, etc.;

4) Electrostatic precipitator;

5) Magnetic dust collector.

Dust collectors are divided into the following according to the dust removal method:

1) Dry dust collector;

2) Semi-dry dust collector;

3) Wet dust collector.

Dust collectors are now used more in the industry, such as electric bag composite dust collectors and bag filters.

Negative pressure dust collector: The fan is placed after the dust collector, and the dust collector works under negative pressure。Since the dusty gas enters the fan after purification, the wear and tear on the fan is small, and this method is used more.

The fan is located behind the bag filter to form a negative pressure inside the dust collector, so a sealed structure must be adopted. Because it is a closed structure, it is easy to take measures such as heat preservation because it is expensive to build a structure, so it is suitable for handling condensable gases with high humidity.

The purpose of the dust collector.

A dust collection hood is set up in each ash place, and the dust-containing gas is transported to the dust removal device through the pipeline gas path, in which the dust is collected in the dust removal device after the gas-solid separation is carried out, and the clean gas is introduced into the main pipe or directly discharged into the whole set of equipment into the atmosphere, that is, the dust removal system, and the dust collector is an important part of the system.

From the perspective of ventilation and dust removal, dust is all solid small particles that can float in the air for a long time, and is a dispersion system, called aerosol, in which air is the dispersed medium and solid particles are the dispersed phase. A dust collector is a device that separates these small solid particles from aerosols.