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Jan 17, 2012· VIBRATION MONITORING OF CRITICALEQUIPMENTS OF POWER PLANTS Boiler feed pumps (TDBFP OR MDBFP) Condensate extraction pumps (CEP) Circulating water pumps Induced draft fans (ID Fan) Force draft fans (FD Fan) Primary air fan Raw water pumps Cooling water pumps Mill motors Coal crushers compressors 30.
typical problems of vertical raw mill Mine Equipments. typical problems of vertical raw mill Rawmill Wikipedia, the free encyclopedia A rawmill is the equipment used to grind raw materials into "rawmix" during the manufacture of cement. it into clinker, which is then ground to make cement in the cement mill .
Mill air flow Mill fan speed Material moisture Mill differential pressure Water injection Mixture composition Product transport volume Grinding aid injection Composition of raw material Temperature after the mill Hot gas Grinding roller wear Mill vibrations Fresh air Figure2. VRM control classification [42]. Classical control ...
The FD fan had excessive vibration at Hz or at about 1x running speed. The ODS (Figure 1) revealed a "rocking" motion of the fan housing from front to back. It appeared that it was pivoting about the back of the housing and the front (suction side) was lifting off the base.
Vertical roller mill for raw Application p rocess materials (4) This type of mill can crush materials which are too large to be fed into the tube (ball) mill (5) Ground materials are dried by the flue gas from the kiln Fig2 Schematic process flow of vertical roller mill for grinding of raw materials Vertical roller mills are adopted in 20 cement plants (44 mills) in Japanget price
Separator Fan 248300 m 3/h ESP Fan 74100 m 3/h 497 mmwg 375 mmwg 500 kW 110 kW Bag Filter Fan 21720 m 3/h 185 mmwg 19 kW Performance The mill is designed to handle a total ball charge of t at loading with a percentage filling of % in both the chambers.
Vibration analysis revealed that once fan No. 2 was turned on, a slight increase in vibration amplitude across all three points of measurement occurred, while fan No. 1 remained the same. Testing showed the highest amplitude appeared in the motor outboard vertical at inches per second, with a dominant peak at 841 cycles per minute ...
Vibration occurs during fan operation and may have many causes, one of which would be imbalance. Other causes of vibration would include mechanical looseness, coupling misalignment, defective bearings, insufficient flatness of bearing mounting surfaces, rotor cracks, driver vibration and vbelt slippage.
Mar 01, 2016· Overheating of the mill. (eg. insufficient water injection for cooling or mill inlet temperature to high, in a raw mill. Or use of very hot clinker in a cement mill) Sudden fluctuations in grinding aid. Incorrect dam ring height setting. Other factors which may cause vibrations are; Grinding force/ballast (N2) pressure.
Installed in 2006, the original Raw Mill fan began to show signs of heavy erosion within the year. High silica dust caused wear on the fan blades adversely affecting the performance of the fan, and as a direct consequence, reducing the plant''s output significantly.
Raw mill exhaust fans or stack fans are also called as dedusting fans. In cement industry raw mill exhaust fans handle ton of exhaust gases for the production of 1 ton of clinker. Raw mill exhaust fans are operated with very adverse situations because the fan handles mainly gases such as CO2, N2, NOx and Sox along with some dust particles.
Common Causes of Vibration in Centrifugal Fans. Ever since centrifugal fans have been manufactured they have been subject to vibration related problems. These problems range from simple unbalance conditions caused by mass variations on the fan rotor to much more complex issues related to shaft alignment, bearing fatigue, or resonance issues.
A good routine vibration program using a portable data collector, or permanent online vibration monitoring, will become the foundation of any predictive maintenance initiative. Measuring, trending, alarming and analyzing fan and motor vibration will provide earlier warning of developing problems and allow replacement parts to be ordered.
Mechanical Solutions, Inc. (MSI) was contracted by a paper mill to solve excessive vibration problems on InducedDraft and ForcedDraft fans and their respective drive trains. This case history discusses the motor driven FD fan problem and solution.. Figure 1. Freeze frame picture from an ODS animation showing the "Rocking" Motion of the FD fan housing.
One of the significant risks to the performance and lifecycle of a fan system is vibration of the equipment. The vibration level of a centrifugal fan will determine its mechanical condition. If the vibration is too intense then it can become serious threat to fan operation causing forced shutdown.
Vibration Severity Chart How To Use This Severity Chart 1) 3in1 chart plots vibration measure and levels for: Acceleration vs. CPM, Velocity vs. CPM, and Displacement vs. CPM. 2) Knowing a machine''s RPM ( CPM) and the vibration sensing technique .
issues with high vibration and prevent mill trips. Requirements of VRM operation Safe, reliable and productive use of a mill plant requires consideration of the following: • high production rates in the presence of potential limitations in: – mill table power – mill differential pressure via the mill fan – external recirculation
Typical applications where condition monitoring is applicable are kiln drives, separators, crushers, screens, gear boxes, conveyor belts, fans, raw mills, ball mills, elevators and blowers. It is essential to use portable instruments, online systems and accessories of rotating machinery and vibration monitoring equipment for detecting ...
vibration_bearing_raw_mill_fanHenan Machinery and, cement plant duct raw mill cyclone to fan cement plant raw mill reparation data doc vibration bearing raw mill fan . More kiln and raw mill 33 stone crusher project in india.
Raw mill exhaust fans or stack fans are also called as dedusting fans. In cement industry raw mill exhaust fans handle ton of exhaust gases for the production of 1 ton of clinker. Raw mill exhaust fans are operated with very adverse situations because the fan handles mainly gases such as CO2, N2, NOx and Sox along
May 01, 2001· Understanding fan vibration and imbalance Key concepts Detecting imbalance early reduces damage and lowers repair costs. Imbalance and vibration are not the same. Dirt, temperature, and loose fits can cause imbalance. Fans play a key role in most manufacturing processes by recirculating air, ventilating hazardous gases, and cooling machinery.
(PDF) Vibration Control of a Raw Mill with Fuzzy Logic re vibration vertical roller mill. There are a number of reasons for high vibrations in vertical roller mills, such as: 1. Failure of the grout or cement material under the steel beams embedded in the foundation top, which allows oil to penetrate, further degrading the concrete.
May 01, 2001· Vibration occurs during fan operation and may have many causes, one of which could be imbalance. Other causes of vibration include mechanical looseness, coupling misalignment, defective bearings, insufficient flatness of bearing mounting surfaces, rotor cracks, driver vibration, and V .
pumps, compressors, pulp refiners, ball mills, furnaces and piping systems. He has a Master of Science in Solid Mechanics from the University of Calgary, and is a member of the Vibration Institute. ABSTRACT Changes in case vibration readings are used .
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