Difference between revisions of "Impingement Dryers"

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[[File:Images.jpg|thumb|right|200px|Impingement Dryer]]
[[File:Impingement_Dryers.jpg|thumb|right|200px|Impingement Dryers]]
The '''Impingement Dryers''' are  typically utilised in the  coating sections of board machines. The  systems are custom designed for  your process and can be either gas or  steam heated.
 


The '''Impingement Dryers''' are  typically utilised in the  coating sections of board machines. The  systems are custom designed for  your process and can be either gas or  steam heated.
===Operating Principle===
===Operating Principle===
Hot air is made to  impinge in a plug flow manner on a moving loosely formed bed of wet  feed. Moisture evaporates as the material traverses along the length of  the bed and is rendered dry at the discharge end. Humid air is  continuously exhausted. The dryer is employed for wet crystals which are  very fragile as well for wet performed feeds which are not suitable for  the normal belt dryer operation.
Hot air is made to  impinge in a plug flow manner on a moving loosely formed bed of wet  feed. Moisture evaporates as the material traverses along the length of  the bed and is rendered dry at the discharge end. Humid air is  continuously exhausted. The dryer is employed for wet crystals which are  very fragile as well for wet performed feeds which are not suitable for  the normal belt dryer operation.
 
 
===Special Features===
===Special Features===
* Suitable for well aerated beds of preformed, crystalline or granular wet feeds.
* Suitable for well aerated beds of preformed, crystalline or granular wet feeds.
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* Continuous operation
* Continuous operation
* Shear sensitive materials can be handled.
* Shear sensitive materials can be handled.
===Applications===
===Applications===
* Menthol Crystals
* Menthol Crystals
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* Pigment
* Pigment
* Organic Crystals
* Organic Crystals
===Modern Air Impingement Technology===
===Modern Air Impingement Technology===
The  brand new high velocity hot air impingement dryer is used to dry a  water based  silicone finish on a spun bonded polyester non woven web  that is 210  inches wide. The gas-fired dryer system uses high velocity  hot air  impingement nozzles mounted beneath the product to apply hot  air to the  web at a right angle. Hot air impingement breaks through the  boundary  layer of air that surrounds the moving web and transfers heat  to the  product to vaporize liquids in the coating or finish. The  turbulence  created also helps to exhaust vapor from the process, which  speeds  further drying. Impingement air is exhausted from the dryer  through  return tubes, which are evenly spaced across the dryer. High  velocity  hot air impingement is extremely effective in applications  where large  quantities of water must be removed from a saturated or  coated product.
The  ultramodern hot air impingement dryer is used to dry a  water based  silicone finish on a spun bonded polyester non woven web  that is 210  inches wide. The gas-fired dryer system uses high velocity  hot air  impingement nozzles mounted beneath the product to apply hot  air to the  web at a right angle. Hot air impingement breaks through the  boundary  layer of air that surrounds the moving web and transfers heat  to the  product to vaporize liquids in the coating or finish. The  turbulence  created also helps to exhaust vapor from the process, which  speeds  further drying. Impingement air is exhausted from the dryer  through  return tubes, which are evenly spaced across the dryer. High  velocity  hot air impingement is extremely effective in applications  where large  quantities of water must be removed from a saturated or  coated product.
The complete dryer system measures 11.75 feet long  by 21 feet wide by  11.8 feet high, including the dryer enclosure,  blowers, duct work and  structural steel support frames. The dryer  enclosure is constructed of  aluminized steel with stainless steel trim.  Its walls are extensively insulated. Three bolt-on plug doors with  handles allow access to the  dryer's interior for maintenance, and two  pressure gauges display supply  plenum air pressure.
The complete dryer system measures 11.75 feet long  by 21 feet wide by  11.8 feet high, including the dryer enclosure,  blowers, duct work and  structural steel support frames. The dryer  enclosure is constructed of  aluminized steel with stainless steel trim.  Its walls are extensively insulated. Three bolt-on plug doors with  handles allow access to the  dryer's interior for maintenance, and two  pressure gauges display supply  plenum air pressure.
The new high  velocity hot air impingement dryer also includes a  mechanical subsystem  that raises the dryer's upper cap 24 inches above  its base, allowing  complete access to the product web. Motorized screw  jacks raise and  lower the upper cap, and are operated from the system's  central control  panel. Dryer halves are gasketed to form a tight seal in  the closed  position.The dryer includes a complete integrated control package. Built  into a  NEMA 12 enclosure, the control system includes all necessary  electrical  and gas controls, as well as operator interface components. A  PLC,  specifically programmed by the company, controls temperature in  each of  two heat zones. The dryer system is shipped assembled,  pre-wired and  pre-piped for easy handling and installation.
The new high  velocity hot air impingement dryer also includes a  mechanical subsystem  that raises the dryer's upper cap 24 inches above  its base, allowing  complete access to the product web. Motorized screw  jacks raise and  lower the upper cap, and are operated from the system's  central control  panel. Dryer halves are gasketed to form a tight seal in  the closed  position.The dryer includes a complete integrated control package. Built  into a  NEMA 12 enclosure, the control system includes all necessary  electrical  and gas controls, as well as operator interface components. A  PLC,  specifically programmed by the company, controls temperature in  each of  two heat zones. The dryer system is shipped assembled,  pre-wired and  pre-piped for easy handling and installation.

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