Welcome to the official website of Luoyang Yixin Environmental Protection Technology Co., Ltd.!
Dedicated to air pollution control
Design, Development, Production, Sales, Installation, and Maintenance Services
16
2023
-
02
Bag filter supplier: Working principle and advantages and disadvantages of bag filter
Author：
Bag filter supplier Introduction: Bag filters are dry dust collectors. The filter material will be used for a period of time. Due to shielding, collision, retention, diffusion, and electrostatic effects, a layer of dust accumulates on the surface of the filter bag, which is called the primary layer. In subsequent operation, the primary layer becomes the main filtration layer of the filter material. With the help of the primary layer, filter materials with larger mesh sizes can achieve higher filtration efficiency. As dust accumulates on the surface of the filter material, the efficiency and resistance of the dust collector also increase accordingly. When the pressure difference between the two sides of the filter material is large, some fine dust particles attached to the filter material will be squeezed out, reducing the efficiency of the dust collector. In addition, the high resistance of the vacuum cleaner will significantly reduce the air volume of the dust removal system. Therefore, after the resistance of the vacuum cleaner reaches a certain value, the dust should be cleaned in time. The dust removal process must not damage the primary layer to avoid reduced efficiency.
In recent years, in order to improve the atmospheric environment, the country has introduced a series of policies and measures to control environmental pollution. Among them, governance must start from the source. Many factories directly discharge smoke into the atmosphere without complete filtration, which not only pollutes the atmosphere but also faces penalties from environmental protection departments. However, bag filters can now solve this problem.
I. Working principle of bag filter
Bag filter suppliers indicate that bag filters are dry dust collectors. They are suitable for collecting fine, dry, and fiber-free dust. The filter bags are made of woven filter cloth or non-woven felt, using the filtration function of the fiber fabric to filter dusty gases. When dusty gas enters the bag filter, large and heavy particles will settle and fall into the hopper. When gas containing fine dust passes through the filter material, the dust will be captured, and the gas will be purified.
Bag filters combine the characteristics of chamber backblowing and pulse jetting of dust collectors, enhancing adaptability; it can not only handle ordinary concentration dust gas but also high-concentration dust; it can be used as dust removal equipment for crushers, dryers, coal mills, raw material mills, subcoolers, cement mills, packaging machines, and the top of each warehouse, as well as dust removal equipment in other industries.
II. Advantages and disadvantages of bag filters
Advantages:
1. High dust removal efficiency. Bag filters can collect fine dust particles larger than 0.3μm, and the dust removal efficiency can reach more than 99%.
2. Flexible application, air volume can range from hundreds of cubic meters/hour to hundreds of thousands of cubic meters/hour. It can be installed as a small unit directly indoors near the machine tool or used as a large dust removal chamber, namely a "bag filter".
3. Simple structure, stable operation, low initial investment (compared to electrostatic precipitators), and easy maintenance. Therefore, bag filters are widely used to eliminate dust pollution, improve the environment, and recover materials.
4. Easy dust handling. Bag filters are dry dust removal equipment and do not require water, so there are no problems with wastewater treatment or sludge treatment, and the collected dust is easy to recover.
Disadvantages:
1. Some flue gases have a high water content, or the dust they carry is highly hygroscopic, often causing the filter bags of the bag filter to stick and block the filter material. To ensure the normal operation of the bag filter, necessary drying or heat insulation measures must be taken to ensure that the moisture in the gas does not condense.
2. Bag filter suppliers indicate that Bag filter bags have limited temperature resistance. Cotton and wool filter materials can withstand temperatures of 80-95℃. Synthetic fiber filter materials can withstand temperatures of 200-260℃. Glass fiber filter materials can withstand temperatures of 280℃. When purifying high-temperature flue gas, measures must be taken to reduce the flue gas temperature.
The company mainly produces various dust removal, desulfurization, denitrification, VOCs waste gas purification, wastewater treatment, noise reduction, complete sets of industrial electrical control systems and equipment, and researches and develops waste gas, wastewater, waste residue, and noise treatment equipment.
Contact Us
Telephone:+86-379-67323008
Phone:+86-5824998401
+86-9838965599
Email:yx23008@163.com
Address: Xin'an County Economic and Technological Development Zone, Luoyang City, Henan Province
