FAQs on Bag Filter Dust Removal Equipment

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FAQs on Bag Filter Dust Removal Equipment 1. What constitutes a high-quality, well-functioning dust collector? The filtered flue gas must meet the **emission concentration standards** as specified in the design requirements of the dust collector ； The operating resistance of the dust collector is generally kept below 150 Pa ； The service life of the filter media exceeds 2 years ； The service life of the electromagnetic pulse valve in the dust removal system reaches 5 years with 100,000 actuations. 2. What key components are required for a high-quality dust collector? ●Strong voltage resistance ； Large amount of injection air ； The diaphragm material is durable ； An electromagnetic pulse valve that ensures high consistency in product quality and enables the application of effective dust-clearing pressure at the bottom of long bags (especially those over 6 meters in length). ●Filter bags made from filter media with good air permeability, corrosion resistance, and wear resistance, as well as suitability for on-site process conditions (such as temperature and chemical erosion), and crafted using high-quality sewing techniques. ●A large-capacity, high-pressure air tank capable of achieving optimal blowing effects, equipped with a pressure gauge and a fully automatic drain valve. ●A dust removal control system that is easy to operate, allowing site supervisors to quickly adjust the blowing parameters according to process requirements (such as microcontrollers and PLCs). The control system needs to be equipped with a display and recording system for parameters such as online resistance differential pressure, inlet temperature, injection time, and emission concentration, as well as alarm signals. 3. What are the main causes of bag filter failure? ●The most common reason is the failure of the dust removal system: that is, the compressed air used for cleaning the filter bags does not have enough force to effectively remove the dust adhered to the filter media, which leads to an increase in the resistance of the dust collector and the clogging of the filter bags. The main reason for the failure of the dust removal system is the quality issues of the electromagnetic pulse valve. ●Other reasons include the improper selection of filter media or poor manufacturing quality, which lead to phenomena such as hydrolysis, acidolysis, excessive temperatures, peeling of the coating layer, and rupture of the filter bags. Additionally, the inlet flue gas concentration, dew point, spacing between the openings in the grid, and the layout of the piping systems are not properly controlled ； The design and manufacturing processes of the housing and ash hopper are poor, resulting in issues such as air leakage. ●There is a lack of maintenance management during the equipment operation phase. 4. How to choose a high-quality electromagnetic pulse valve? ●Choose high-quality brands that are entirely imported: The electromagnetic pulse valve is the heart of dust removal equipment, and its total cost accounts for about 5% of the overall cost of a pulse jet dust collector ； It costs 1% as much as a bag filter with an air tank; by using the highest quality imported pulse valves, the total cost of the equipment increases by only 1–2% compared to those that use domestic valves. Therefore, it is highly unwise to save on equipment costs by using pulse valves and thus take the risk of the entire dust removal system failing. ●Choose valve manufacturers with a long history: Such manufacturers must have over 10 years of production experience along with successful operational records, so as to ensure that their pulse solenoid valve products have a comprehensive quality assurance system, enabling them to remain free from inspection even after 100,000 actuations over a period of 5 years. ●Choose a 5-year free warranty period: The number of experimental actuations of the pulse valve is not sufficient to determine the quality of the valve; the diaphragm must be tested under the effects of natural aging over time. Therefore, valve suppliers must provide a free warranty period for the diaphragm and solenoid coil, usually lasting 5 years. ●Choose a pulse valve with an actual blowing air volume, rather than just focusing on the connection diameter: the interface size of a pulse valve often does not indicate its dust-clearing capability. Some pulse valve designs use a small-diameter diaphragm, but merely increase the interface size. For example: a 2\" valve diaphragm is used in a valve housing with a 2 1/2\" interface. This will result in insufficient blowing air volume at the valve, leading to a poor dust removal system. ●Select a pulse valve that can be used across high, medium, and low pressure ranges: the pressure tolerance of the pulse valve must be at least 1–8 kg/cm2. In this way, if the resistance of the filter media increases over time during operation, the pressure in the air tank can be adjusted to maintain an optimal operating resistance for the dust collector, thereby preventing the filter media from clogging. ●Choose a pulse valve with consistent manufacturing quality: The production of such valves must take place on fully automated production lines equipped with robots and CNC machines, in order to avoid inconsistencies in quality resulting from manual processing. In a dust removal system, a leak in just one valve can often cause the entire system to fail. ●Choose a low-resistance pulse valve: The internal structure of the pulse valve must ensure a large amount of blowing air and a long diaphragm stroke, while the internal design of the housing is based on fluid dynamics to minimize valve resistance. Due to improper valve body design, some 3\" port valves can only achieve a purging air volume equivalent to that of 1\" or 2\" port valves. By using pulse valves with low resistance and high injection volume, each valve can clean a larger area of the filter media, **reducing the overall cost of the injection system. Due to the reduced number of valves, the operating and maintenance costs of the dust collector also decrease accordingly. 5. What consequences can arise if the electromagnetic pulse valve is not selected properly? ●A poor-quality pulse valve diaphragm can render the entire dust collector ineffective: since the rupture of a valve diaphragm leads to a significant drop in pressure within the air tank as well as insufficient airflow, it prevents the other valves located in that air tank from functioning properly. Poor dust cleaning in the dust collector can lead to localized clogging of the filter bags; as a result, the air-to-filter ratio increases, operational resistance rises, and the service life of the filter media is shortened more rapidly. ●Low-quality pulse valve diaphragms increase the difficulty of equipment inspection and maintenance: When a small portion of the valve diaphragms rupture, it is difficult for on-site staff to determine the cause of the problem. Identifying which valves have damaged diaphragms among hundreds of valves requires a lot of time spent checking each valve one by one. ●Poor-quality diaphragms in pulse valves severely impact production operations: when the valve fails, it is often necessary to shut down the entire filtration unit or use a bypass exhaust method to carry out maintenance work; in some cases, the entire dust removal system or even the entire production line has to be stopped for repairs, which greatly disrupts the normal production process of the enterprise and pollutes the industrial environment at the site. Frequent failures of the dust removal system can also result in penalties, fines, or even suspension or closure of the enterprise by local environmental enforcement agencies. ●A defective dust removal system increases operating costs: Due to poor dust removal performance, the pressure drop across the dust removal system is too high, causing the fans to operate under excessive load and leading to increased energy consumption ； Insufficient dust removal leads to bag clogging, shortens the service life of the filter bags, and reduces the dust removal efficiency of the entire dust collector ； Due to the frequent need to replace the diaphragms, factories must keep large inventory of these diaphragms as consumables, and they also have to invest considerable manpower and resources in their replacement, which hinders companies from controlling production costs and improving productivity. ●A malfunctioning dust removal system can lead to safety accidents: if the flue gas contains flammable and explosive gases, combined with an increased resistance from the filter media, it may result in serious hazardous incidents. 6. How can it be proven that the electromagnetic pulse valves of the GOYEN brand meet all the above requirements in terms of quality? ●Longest history in pulse valve production: Australian Plateau Company was established in 1935, and for nearly 30 years it has been dedicated to the research, development, and production of high-quality electromagnetic pulse valves for dust collector injection systems. Currently, its market share exceeds 60% globally, and reaches as high as 80% in Europe and the United States. ●Longest experience in pulse jetting: Gaoyuan Company has over 30 years of experience in designing pulse jetting systems as well as in manufacturing valves. The company possesses advanced design technologies for dust removal and cleaning systems, and leverages its extensive database of laboratory blowdown systems accumulated over many years to provide domestic design firms with free assistance in developing the most suitable pulse cleaning systems based on the specific requirements of each project. ●Longest service life of valves: The electromagnetic pulse valves produced by Gaoyuan Company have withstood over 100,000 normal operating cycle tests under standard test conditions of a gas chamber pressure of 760 kPa (within an operating pressure range of 60–860 kPa). The national general distributor was the first in the dust removal industry to offer a 5-year free operational quality warranty, providing free replacement of important components such as diaphragms and electromagnetic coils during normal operation for up to 5 years. ●Currently, there are numerous successful cases in China of dust removal systems that have been in operation for over 5 years without any need to replace any spare parts. The end-users of these systems include Shanghai Baosteel Group, Ma’anshan Iron and Steel Group, Kunming Iron and Steel Corporation, Taiyuan Iron and Steel Group, Hebei Jidong Cement Co., Ltd., Shandong Zhangdian Cement Factory, Fuzhou Powder Station, Yuxi Tobacco Factory, and others. ●It features the highest blowing air volume and the lowest valve resistance among pulse valves with identical interface sizes: thanks to the large stroke of the diaphragm in the electromagnetic pulse valves produced by Gaoyuan Company, and the internal structure of the valve body designed using fluid dynamics principles, it boasts the lowest resistance, the highest outlet pressure, the fastest diaphragm switching time, as well as the highest Cv and Kv flow coefficients among pulse valves of similar interface sizes. ●Each pulse valve is capable of cleaning a larger area of filter media: Since the use of highland pulse valves allows for an increase in both the air volume and outlet pressure during purging, a highland pulse valve with the same outlet size can have more purge holes on its outlet pipe, thereby ensuring that the filter bags beneath the plenum receive the same level of purging force. Compared to pulse valves from other brands, the Gaoyuan valve allows the number of filter bags that can be installed per row or the filtering area to increase by more than 20%. This not only **reduces the number of valves in the blowing system as well as the cost of the system**, but it also allows the use of experimental data from Gaoyuan Company for the design of the dust removal system (GOCO technology), thereby ensuring that the dust collector achieves optimal pulse cleaning performance.