Here's the recent articles submitted by oleg tchetchel
Articles By oleg tchetchel
Fiberglass Fan For Chemical Industry
Submitted as: Oleg Chechel
CB Blower fans can be supplied to be gas tight and made of special materials to resist corrosion. Fans and turbo blowers are supplied to provide air for carbon black plants and for sulphuric acid plants.(read
entire article)
View : 316 Times
Category : General
High Temperature Industrial Exhaust Ventilator
Submitted as: Oleg Chechel
NFPA SBCI is a not-for-profit organization of government officials from the United States and several foreign governments, which serves a strong leadership role in the delivery of model building codes. The purpose of the NFPA can be summarized into three main categories. First, NFPA promotes the science and improves the methods of fire protection and prevention, electrical safety, and other related safety goals. Secondly, it obtains and circulates information on these subjects. And thirdly, it secures the cooperation of its members and the public in establishing proper safeguards against loss of life and property. The fourth organization is Underwriters Laboratories, Inc.. UL is a non-profit, independent organization that maintains and operates laboratories for examination and testing of devices, systems and materials to determine their relation to life, casualty hazards and crime prevention. UL has three safety standards that apply to emergency smoke exhaust products. UL705 is concerned with the mechanical and electrical construction to insure safe operation. All electrical components (motor, wiring, switches, enclosures, etc.) must be ULlisted. UL793 is concerned with the lifting mechanism for the butterfly dampers and the fusible link. In order for a product to be listed in the UL Directory under ÒPower Ventilators for Smoke Control Systems,Ó it must meet the requirements of both UL705 and UL793. Additionally, UL must witness a full-scale test of a fan operating for the required time at the specified elevated and temperature.(read
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View : 415 Times
Category : Others
High Temperature Industrial Fan
Submitted as: Oleg Chechel
For industrial fans applications, it is necessary to consider high cycle fatigue, low cycle fatigue in cyclical operation with speed changes, and numerous start-stop cycles. If rapid temperature changes are encountered, transient analysis may be required due to thermal stresses. When fans are exposed to elevated temperatures, many aspects of the fan design must be reviewed to make sure the fan will withstand the extreme temperatures and that the fan is appropriately designed for the application.(read
entire article)
View : 331 Times
Category : Others
Dust Collectors For Material Conveying
By: oleg tchetchel
Dust collection, fume removal, and material conveying systems each have unique characteristics, but all three are similar in their dependence upon proper air velocities. Dust collection and fume removal are generally thought of as “housekeeping” systems that usually incorporate a hood at the system entry point. There are many types and styles of hoods in common use, and hood design is a subject in itself. Some state and local codes offer hood design criteria, and there are several reference texts, such as Industrial Ventilation - A Manual Of Recommended Practices, that can assist in the selection and design of hoods. In all cases the hood design should minimize turbulence and offer the lowest possible entrance losses.(read
entire article)
View : 284 Times
Category : Business
Industrial Pneumatic Conveying
By: oleg tchetchel
Pneumatic conveying is the transport of material from one location to another using air as the conveying medium with which the material is moved. Energy is needed to transport the material from one place to another. This energy can be supplied by a mechanical method (such as conveyor belts, buckets, etc), fan, blower, or a compressor. This newsletter will focus on the use of a fan to convey material.(read
entire article)
View : 288 Times
Category : General
Pneumatic Conveying Blower Systems
By: oleg tchetchel
A well designed pneumatic conveying system is often a more practical and economical method of transporting materials from one point to another than alternative manual or mechanical systems. This article outlines some of the fundamental principals of pneumatic conveying systems and explains various special considerations for fan selection.(read
entire article)
View : 303 Times
Category : Others
How To Increase Fan Performance
By: oleg tchetchel
Industrial processes and plant ventilation systems often need more air than originally designed. Increased production requirements, process changes, and facility renovations are a few of the major reasons. Additionally, the lack of adequate maintenance over time can negatively impact system airflows. This article discusses several procedures that can increase airflow. Often airflow can be increased by adhering to proper fan maintenance procedures as outlined in fan installation and maintenance literature.(read
entire article)
View : 317 Times
Category : Service
The Effect Of System On Fan Performance
By: oleg tchetchel
Fans are typically tested and rated in prescribed test configurations defined by the Air Movement and Control Association. This is done to ensure standardized procedures and ratings so that system designers can make realistic choices among various manufacturers. Beyond the routine system resistance calculations, the location of some common components and their proximity to he fan inlet or outlet can create additional immeasurable losses commonly called System Efect. These losses, if not eliminated or minimized, will necessitate fan speed and horsepower increases to compensate for the performance deficiencies.(read
entire article)
View : 305 Times
Category : Others
Combustion Fans
By: oleg tchetchel
The combustion of coal and most fuel oils will release sulfur fumes into the flue gas. If a wet scrubbing or cleaning apparatus is used, water vapor will combine with the sulfur to form sulfuric acid. This can place severe constraints on the fan types available to handle this highly corrosive gas stream. For this very reason, flue-gas-desulfurization equipment is designed into the pollution control systems of many combustion processes. Another alternative to reduce the potential for sulfuric acid in the exhaust system is to mix lime or crushed limestone in a fluidized bed combustion process so the lime will neutralize the sulfur and stabilize the pH of the exhaust gases.(read
entire article)
View : 359 Times
Category : Others
Mechanical Draft Fans
By: oleg tchetchel
The burning of gas, oil, coal, or other combustible material requires air. When the end result of the burning is to be an efficient combustion process, in compliance with Federal and State Clean Air Act requirements, the volume of supply air must be reliably controlled. Insufficient air volume will result in wasted fuel and excessive particulate along with potentially explosive gases in the exhaust system. Too much air increases the amount of heat carried up the stack by the excess draft. Either extreme increases the cost and difficulty of controlling exhaust emissions.(read
entire article)
View : 271 Times
Category : Service
