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Introduction of electrostatic precipitator and bag filter


还有一个电袋复合除尘器。 The introduction of electrostatic precipitator and bag type dust collector, electrostatic precipitator and bag type precipitator belong to two types of precipitator and an electric bag composite precipitator.


Let's start with electrostatic dust removal:


Metal wires with the same cross-sectional shape are called discharge electrodes. The positive electrode is made of metal plates of different geometries and is called a dust collection electrode. Compared with other desulfurization and dust removal equipment, the electrostatic bag type dust collector has low energy consumption and high dust removal efficiency, and is suitable for 0.01 to 50 μm dust. It can be used in places with high flue gas temperature and high pressure. The theory shows that the treated flue gas The larger the amount, the more economical the investment and operating costs of using an electrostatic bag filter.


The introduction of electrostatic precipitator and bag type precipitator, this product is widely used in thermal power plants, metallurgy, building materials, chemical industry, papermaking and other industrial kiln as well as dust removal in industrial process. It is currently the main dust removal equipment.


The process of electrostatic precipitator is as follows:


1. Gas ionization process: high voltage direct current is applied between two specific electrodes to form an electric field, so that the voltage of the electrode system exceeds the critical voltage, and the gas ionization generates a corona discharge. The electric field around the discharge electrode is strong enough to ionize the gas in a very small range. After the occurrence of corona, the corona region near the far left of the discharge electrode is within a range of about 2-3 mm from the outer surface of the discharge electrode. In this area, due to a sufficiently high electric field strength on the surface of the discharge electrode, the gas is ionized and a large number of positive ions and electrons are generated. At this time, if a negative voltage is applied to the discharge electrode, a negative corona discharge is generated, and the electrons move to the positive electrode, and the positive Ions move towards the discharge electrode itself.


2. Dust particle charging process: When the electrostatic bag filter is working, the ions or electrons generated in the corona area enter the corona area and collide with neutral molecules to charge the dust particles. The size of the charge is related to the particle size of the dust particles, the strength of the electric field, the thermal energy of the ions, and the residence time. Generally, we think that there are two mechanisms for the charging of dust particles: electric field charging and diffusion charging. Collision and adhesion to the dust particles to be charged. The latter is due to the irregular thermal movement of ions and the collision and adhesion of gas diffusion and dust particles, which cause the dust particles to be charged.


3. Dust collection process: After the dust is charged, it moves to the opposite polarity electrode under the action of the electric field and accumulates on the electrode surface. Generally, the speed of dust moving perpendicular to the plate is called the driving speed. The driving speed is related to the dust charge, electric field speed, gas properties and other factors. After the negatively charged dust contacts the vacuum cleaner, it immediately loses its charge and becomes neutral particles adhered to the electrode surface. Then the electrode is vibrated by the vibrating device, and the dust particles are scattered from the electrode surface and fall into the dust removal of the lower part of the electrostatic bag duster from time to time. Device for cleaning.


Introduction of electrostatic precipitator and bag filter, bag filter:


Filtering principle: Dust-containing gas enters through the air inlet. When passing through the ash hopper, some large particles of dust in the gas are separated by inertial force and gravity and fall directly into the bottom of the ash hopper. Dust-containing gas passes through the ash hopper and enters the filter bag filter area of the intermediate box. The gas passes through the filter bag, and the dust is blocked on the surface of the filter bag. The purified gas enters the upper box through the filter bag mouth, and then is discharged from the air outlet.


Dust removal principle: With the extension of the filtration time, the dust layer on the filter bag will continue to accumulate, and the resistance of the dust removal equipment will continue to increase. When the resistance of the equipment rises to the set value, the dust removal device will stop at the beginning of dust removal. First close the auxiliary chamber lift valve, cut off the filtered airflow, and then open the electromagnetic pulse valve. Compressed air quickly shrinks in the upper case at a very fast speed, injected into the filter bag, and causes the filter bag to shrink and deform to generate vibration. Under the action, the dust adhered to the surface of the filter bag is peeled off and falls into the ash bucket. After the dust removal is completed, the electromagnetic pulse valve is closed, the poppet valve is opened, and the chamber returns to the filtering state. Each ash cleaning chamber is stopped successively, and the time from the start of the ash cleaning to the next ash cleaning is a cleaning cycle.


Related introduction of electrostatic precipitator and bag precipitator Several models and uses of dust collector equipment


静电除尘器和袋式除尘器相关介绍 ,欢迎致电宇晨除尘设备厂家 400-622-6298,我司为您提供更多的信息,报价、设计方案! For more information about electrostatic precipitator and bag precipitator , please call Yuchen Dust Removal Equipment Manufacturer 400-622-6298. Our company will provide you with more information, quotation and design solutions!

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