Baghouse problems and common fault analysis in the cement industry, cement industry baghouse installation problems 1, the design is unreasonable (1), the amount of air Since the production of cement production transformation and technological progress and the cement production process, stand-alone device in the continuous improvement of exhaust emissions is constantly increasing; or by the parameters of the original selection process do baghouse design institute, resulting in air volume enough, resulting in failure precipitator; a lot of bag filter equipment manufacturers to understand the process, are not familiar with, you can not configure the filter according to changes in process conditions due to insufficient air flow will cause a loss. (2), dust concentration Technological advances and new technology in cement industry process of continuous use, compared with the traditional process variations in dust concentration in the exhaust gas emission is great; such as vertical mill, using an extruder and efficiency of the separator, to further simplify the process yield greatly improved, the dust concentration in the exhaust gas will greatly increase in the cement industry raw material and cement grinding high-efficiency separator process, baghouse dust is not only equipment, but the process of the host device, the inlet dust concentration of 1600g / Nm3 or more, and usually use a dust removal facilities, this process does not consider the characteristics, but also one of the reasons baghouse failure. (3) filter Baghouse filter is the heart; the selection filter is a high-tech work, you need the characteristics of the treated gas and dust do in-depth understanding of these characteristics and filter according to need; but also understand media itself, the physical and chemical properties, try to make your choice of media use within its range of properties; many equipment manufacturers and owners often inadequate attention, just select the filter selection based on price, while ignoring the media and conditions of use Quality of products. Features (4) containing gas Dust to be treated due to different process conditions and conditions of use, its characteristics are different; including dust concentration, temperature, humidity, amount of exhaust gas, and the degree of volatility of these features will affect the use of bag filter. (5) cleaning design Cleaning bag filter baghouse is related to whether the key long-term reliable operation, so on different occasions what kind of cleaning method is very important; especially in the cement industry, on different occasions, the characteristics of the exhaust gas different; the raw material process to consider the issues and humidity; high temperature sintering process to consider the issue; blasting coal mill to consider the issue; the process is made to consider the problem of wear and a high concentration of problems; choose the manner in which it is under these conditions Very important. (6) Design cinder Cinder problem baghouse is often not valued by designers and users to make, but it is the cement industry baghouse using one of the reasons bad; hopper design, selection of ash discharge valve, ash bucket or need heat, you do not add shock playing facilities are all related to the dumping of ash process can long-term reliable operation. (7) Control Design Baghouse control is based on the conditions of use, process air volume into account, including controlling cleaning, cinder, temperature, resistance and other major parameters; for a large bag filter, it should also consider recording parameters, alarm functions and demanding but also consider the diagnosis and display of functional failures; this is not a single-chip, single board computer or PLC can be resolved, according to the conditions and requirements of owners to design (is not necessary to configure DCS control system) . Design (8) of the apparatus body Production and design baghouse apparatus body is very important, many equipment manufacturers are not very important; tend to believe that the bag filter threshold is very low, production is relatively simple, just get a drawing can be manufactured and use; that is not true, bag filter cleaning and cinder design; design of high temperature baghouse apparatus body to heat stress problems, high temperature expansion problems, high temperature corrosion problems; room temperature baghouse toner condensation corrosion; coal mill bag filter fouling, anti-burning explosion problem; a large bag filter air distribution problems. Maintenance issues, security issues, and so the use of the body are designed to be taken seriously. The process should be based on conditions of use and targeted to baghouse design, manufacture and use to solve problems. 2, mainly the production equipment Baghouse production must be serious and careful work, some components must also use special abrasive manufacturing capacity to meet the requirements; some special conditions of use baghouse also select to meet the special requirements of the material system; flower plate production, bag cage, and other major components must meet the design requirements, there are still many problems in these areas; pressure vessel must also be installed through the use of specialized inspection department to detect; each weld must be carried out on-site installation of large Shihai detection, especially for trachoma, weld areas must be carefully examined, but also the use of a pressure detector, if necessary, the cement industry due to these reasons baghouse problems more. 3, selection of accessories and installation unreasonable Baghouse accessories include: bag, pulse valve, pneumatic components, bag cage, lift valve, fitting in each bag filter has the role of the Special Envoy, accessories, specifications and quality related to the dust bag It is working correctly. Among these accessories, bag, bag cage, and is the most important pulse valve, filter bag and bag cage problems, replace it more convenient. Most occur in the cement industry pulse valve failure or substandard unreasonable choice and quality pulse valve, causing cleaning problems are more due to cleaning can not completely, baghouse running resistance will be high, and prone to a vicious cycle lead dust complete failure, of course, the problem of irrational installation even more.
