A plate heat exchanger (oil cooling device) is composed of many stamped corrugated thin plates at certain intervals,  sealed with gaskets around them,  and overlapped with a frame and compression screws. The four corner holes of the plate and gasket form the fluid  distributor and collection pipe. At the same time,  the cold and hot fluids are separated reasonably so that they are separated on both sides of each plate. Flow in the  channel and conduct heat exchange through the plate.

The advantages of plate heat exchangers (oil cooled devices) over tube heat exchangers (oil cooled devices) are as  following:

(1) Higher heat transfer coefficient

Due to the fact that different corrugated plates are in the opposite direction, forming complex channels,  the fluid between the corrugated plates flows in a three-dimensional rotating flow. Turbulence can occur at lower  Reynolds numbers (generally Re=50-200), resulting in a higher heat transfer coefficient. Generally,  it is considered that the red color is 3-5 times that of the shell and tube type.

(2) Large logarithmic mean temperature difference, small end temperature difference

The hot surface and no bypass of the plate heat exchanger (oil cooling device) result in a small temperature difference  at the end of the plate heat exchanger, and the heat transfer to water can be less than 1 ℃,  while the shell and tube heat exchanger can only reach 5 ℃,  which is not conducive to low-temperature heat dissipation and oil cooling.

(3) Larger heat exchange area

The plate heat exchanger has a compact structure,  and the heat transfer area per unit volume is 2-5 times that of a tube heat exchanger. Unlike shell and tube heat  exchangers, it does not require a reserved maintenance position for the extraction of tube bundles. Therefore,  in order to achieve the same heat transfer capacity,  the plate heat exchanger occupies an area of approximately 1/5 to 1/8 of the shell and tube heat exchanger.

(4) Easy to change heat exchange area or process combination

Plate heat exchangers (oil cooled devices) can achieve the required process combination by changing the layout of plate  types or replacing multiple plate types,  making the heat exchange area of shell and tube heat exchangers adapt to new heat exchange conditions,  resulting in more obvious heat dissipation and more prominent oil cooling. The heat exchange area of a tubular heat  exchanger is fixed and cannot be increased.

(5) Easy to clean

As long as the pressure bolt is loosened, the plate heat exchanger tube bundle can be loosened,  and the plate heat exchanger can be removed for mechanical cleaning. Once the tube heat exchanger (oil cooling device)  is disassembled, if there is no professional manufacturer to repair it,  customers cannot assemble it themselves and cannot reuse it. They can only purchase a new one.

The oil itself is lubricated, and the components of the equipment can be lubricated while cooling. For those parts in the biomass pellet machine that have relative motion (such as the drive shaft, press roller, etc.), the oil cooling device can not only cool, but also reduce the friction between the parts, reduce the degree of wear, and extend the service life of the equipment