Some industrial engines are designed for the use of gaseous fuels (such as natural gas). Although similar to diesel engines, these engines have been modified so that combustion reactions in cylinders are initiated by sparks, which is different from real diesel engines. The actual industrial diesel engines used have reciprocating pistons. The diesel engine can be either two-stroke or four-stroke. According to the arrangement of the cylinders, the fuel engine can be divided into vertical, horizontal or inclined angles, such as a V-shaped engine. Which type of engine is used in the industry depends on the requirements for engine power, deadweight, and size. The main role of engine oil in the engine is to reduce friction, absorb frictional heat, and cool the engine.
In order to meet the design requirements of different types of engines, a series of engine oils with viscosity and quality grades have been developed. In order to reduce the formation of deposits and coke, all engine oils must have good thermal oxidation stability to extend the oil change period. Well-designed engine oil filtration systems are also closely related to the service life of the oil. The role of oil in addition to reducing friction, there is also the removal of metal wear particles between the small gaps on the surface of the movement, to maintain the role of clean. The product of wear particles and fuel combustion must remain in suspension in the oil to be filtered out by the engine oil filter unit. The conditions of the diesel engine during operation are varied, including a low speed, stable, and a medium speed variable output, a high speed, high output. Because the role of oil cleanliness in the engine is important, the oil must contain a clean dispersant. Engines with high compression ratios tend to accelerate the formation of oil deposits. Engine oils with high-definition cleanliness can keep the piston clean, reduce the wear rate between the cylinder and piston rings, and prolong the service life of the engine. Detergents prevent the decomposition products from depositing on piston rings, pumping circuits, and other devices. The oil temperature has a significant effect on the dispersion, and it is difficult to achieve a good dispersion effect at low temperatures. However, for a high-power output of diesel crankcase oil, low temperature dispersion is often the most basic requirement.
The dryer is a kind of mechanical equipment that uses heat energy to reduce the moisture content of materials. It is used to stop the drying operation of objects and vaporize the moisture (usually moisture or other volatile liquid components) in the materials after heating to obtain solid materials with regular moisture content. The purpose of drying is to meet the requirements of material application or further processing.
The future development of dryers will develop and improve dryers under the conditions of deepening the study of drying mechanism and material drying characteristics, and controlling the operation conditions of different materials; In addition, large-scale, high strength, high economy, and improved compliance with raw materials and quality are the fundamental trends of dryer development. Now let's introduce the function, working principle, classification, operating procedures, selection instructions and cleaning methods of the dryer.
The dryer acts as a refrigeration compressor to suck the low pressure (low temperature) refrigerant in the evaporator into the compressor cylinder. The refrigerant steam is compressed, and the pressure and temperature rise at the same time; The refrigerant steam with high pressure and high temperature is pressed to the condenser. In the condenser, the refrigerant steam with higher temperature and cooling water or air with lower temperature stop heat exchange.
The heat of the refrigerant is taken away by water or air and condensed, and the refrigerant vapor becomes liquid. This local liquid is then sent to the contraction valve, which is throttled into a low temperature and low pressure liquid and enters the evaporator; The low temperature and low pressure refrigerant liquid in the evaporator absorbs the heat of the compressed air and vaporizes (commonly known as "evaporation"), while the compressed air condenses a large amount of liquid water after cooling; The refrigerant steam in the evaporator is sucked away by the compressor.
Hopper Dryer,Used Hopper Dryer,Dehumidifying Hopper Dryer,Conair Hopper Dryer
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