What is the working principle of bag dust removal equipment

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.

Bag dust collection equipment, also known as bag type dust collector, is a common type of air purification equipment. It works by trapping particles in the air through filter bags to purify the air.

Specifically, the working principle is: polluted air enters the box of the bag filter from the air inlet, and after pretreatment, enters the filter chamber equipped with a large number of filter bags, and when the air passes through the filter bag, due to inertia, gravity, drift and aerodynamic principle, it is deposited on the cloth surface of the filter bag. Clean air is exhausted through the outlet at the top of the collector.

With the passage of time, the dust inside the dust collector continues to accumulate, and the filter bag adsorbs more particles, at this time, the filter system enters the ash cleaning state, and the high-speed air flow inside the dust collector drives the clean air and dust, which is swept down by the rotating flap or vibrator, and discharged through the dust cleaning system.

In general, the bag dust removal equipment can effectively reduce the particulate matter content in the air and improve the indoor air quality through the filtering effect of the filter bag and the cleaning effect of the ash cleaning system.

Bag dust removal equipment is a common industrial dust removal equipment, which is mainly used for filtering and collecting particulate matter in industrial flue gas. Its working principle is based on the following steps:

The flue gas enters the bag filter. After pre-filtration, the flue gas enters the upper part of the bag filter and enters the dust chamber through the airflow duct.

Particulate matter is trapped. The flue gas passes through a series of filter bags in the dust chamber, the tiny pores on the surface of the flue gas trap particulate matter in the flue gas. Particulate matter is trapped on the surface of the filter bag due to inertia, gravity, electrostatic action, etc.

Particle clogging on the filter bag. Over time, particulate matter can accumulate on the filter bag, causing the vents on the surface of the bag to become clogged, restricting the flow of flue gases.

Filter bag cleaning. In order to maintain the efficiency of the bag filter, the filter bags need to be cleaned regularly. Cleaning operations typically use high-pressure gas or mechanical vibration to loosen the particles on the filter bags and restore the aeration of the filter bags.

Particulate matter collection. The particles that have been cleaned up are collected in the collector. Typically, the particulate matter in the collector needs to undergo secondary treatment, such as sedimentation, drying, etc., in order to carry out ** or treatment.

The working principle of bag dust removal equipment is based on the principle of filtration and ash cleaning, which is characterized by high efficiency, economy, stability and durability, and is an important dust removal equipment widely used in various industrial fields.

The working principle of dust removal equipment is generally the principle of electrostatic adsorption. Because static electricity can absorb dust and other debris, dust removal equipment causes its air purifier filter to generate static electricity, which then absorbs dust in the air.

Bag dust removal equipment is a common industrial pollution control equipment, and its working principle is to use filter bags to filter, separate and capture smoke and dust particles. The specific working process is as follows:

1.Gas into the dust collector: Through the suction fan, the gas containing the soot particles is fed into the dust collector.

2.Smoke and dust separation: the gas enters the bag room, which is filled with bags with high tensile strength and good filtration effect. When the gas passes through the bag, the particulate matter is blocked by the bag, and the clean gas continues to pass through.

3.Ash cleaning and discharge: When the bag is gradually blocked and the resistance gradually increases, the ash cleaning controller will automatically start and open the ash cleaning valve. At this time, the compressed air passes through the jet nozzle to blow back the bag surface and discharge the dust.

4.Recycling: After cleaning, the bag surface is clean and can be used continuously, so as to realize the recycling of smoke and dust, saving energy and material costs.

In short, the bag dust removal equipment can achieve the purpose of purifying the air and protecting the environment by capturing dust, dust and other harmful substances.

The working principle of dust removal equipment is poor. Organized collection through the hood, through the spiral duct with dust, the air with dust is directly transported to the bag filter. The dust is left on the cloth bag. The dust is sprayed into the hopper by blowing. Clean air was emitted at a height of 15 meters.

The working principle of the bag filter is that the dusty air flow enters the cylindrical filter bag from the lower orifice plate, and when it passes through the pores of the filter material, the dust is collected on the filter material, and the clean gas through the filter material is discharged from the discharge port. The dust deposited on the filter media can be detached from the surface of the filter media under the action of mechanical vibration and fall into the ash hopper.

The working principle of the bag filter

After the dusty gas enters the ash hopper from the air inlet, due to the sudden expansion of the air flow section and the action of the air flow distribution plate, part of the coarse particles are separated under the action of dynamic and inertial forces and fall into the ash hopper;As the air flow rotates, the fine, low-density dust particles enter the upper cleaning chamber of the filter bag chamber upwards and are adsorbed on the surface of the filter media. The purified gas is discharged through the exhaust valve at the mouth of the filter bag. Through the filtration and purification process of the filter material, the dusty gas is the result of the combined action of the triple effect of physics, chemistry and biology.

The bag filter is mainly composed of the upper box, the middle box (flower plate), the ash removal device, the diversion device, etc.

The functions of each part are as follows:

1. There is a fixed skeleton or elastic block in the upper box to support the skeleton, which plays the role of separation and protection at the same time.

2. The middle part is equipped with an air inlet pipe, an exhaust pipe and an air outlet pipe.

3. There is a blowing system in the lower part.

4. The ash cleaning part adopts the chamber design, so that the average wind speed can be averaged, so that each chamber can be effectively sprayed, and at the same time, the chambers can be sprayed one by one, or timedly, so as to achieve the purpose of spraying.

When designing a dust collector, you generally need to pay attention to several points, and the following factors need to be paid attention to:

1. The concentration set at the exhaust gas inlet.

2. The amount of exhaust gas after entering the vacuum cleaner.

3. The width of each blowpipe, and the length it can be sprayed.

4. Blowback time.

5. There are regulating valves at both the air inlet and the air outlet.

6. The maintenance door of this series of equipment adopts a handwheel mechanism with a suitable speed.

7. The airtight design is compact and easy to maintain.

8. There are manholes on the top.

9. Both the air inlet and the air outlet are hoods.

10. The installation method is divided into foot type and hoisting type.

11. Add insulation cotton at all pipe connections.

12. The equipment should be installed horizontally on the concrete foundation or steel structure support.

13. Single-phase 220V, 380V, 50Hz three-phase 380V, 660Hz power supply can be selected according to different use occasions.

14. Other special requirements can be provided according to user needs.

A dust bag is a type of industrial textile that is used to filter and capture solid pollutants suspended in the air. It is widely used in cement, electric power, chemical and other industries and sound insulation projects in mechanical processing workshops.

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-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-containing gas enters the filter chamber from the bottom open flange, the coarse particles fall directly into the ash silo, the dust-containing gas is filtered through the filter bag, and the dust stays on the surface of the bag. The clean gas enters the clean gas chamber through the mouth of the bag and is discharged into the atmosphere by the fan. When the dust on the surface of the filter bag continues to increase, the programmable instrument starts to work.

Open the pulse valve one by one, so that the compressed air is sprayed out through the nozzle, clean the filter bag, and make the filter bag expand suddenly. Under the action of reverse airflow, the dust on the surface of the bag is quickly separated from the filter bag, falls into the ash bin, and is discharged by the ash discharge valve.

With the repeated attachment of the powder to the outer surface of the filter bag, the powder layer continues to thicken, and the resistance value of the bag filter also increases. The pulse valve diaphragm sends out a command, the pulse valve is opened when the left and right are submerged, the compressed air in the high-pressure air bag is passed, and if there is no dust or it is small to a certain extent, the mechanical ash cleaning work will stop working.

The gas purification mode of low-pressure pulse bag filter is external filter type, and the dusty gas enters the filter chamber of each unit through the diversion pipe, and the vertical distance between the bottom of the filter bag and the upper mouth of the air inlet in the design has sufficient and reasonable air flow through appropriate diversion and natural flow direction distribution, so as to achieve uniform air distribution in the entire filter room.

When the ash is cleaned, the solenoid valve opens the pulse valve, and the compressed air is sprayed by the ash cleaning control device (differential pressure or timing, manual control) to open the electromagnetic pulse injection according to the set program.

The compressed gas passes through each pulse valve in a very short time in order through the nozzle on the blowing pipe to induce several times the amount of air injected to enter the filter bag, forming an air wave, so that the filter bag produces sharp expansion and impact vibration from the bag mouth to the bottom, resulting in a strong ash cleaning effect and shaking off the dust on the filter bag.