The plate-type heat exchanger is a new type of energy-saving heat exchange device with a high heat transfer effect.
compact structure, small area, simple operation, easy cleaning, disassembly, and maintenance, and is easy to change the heat exchange area or flow combination for additional advantages. The plate is herringbone corrugated in which the medium flow forms the turbulent state. It uses a viscose type seal gasket, where the heat transfer coefficient is high. The main material of the plate utilizes 304, 316, 316L stainless steel plates. This product is suitable for chemical, mechanical, pharmaceutical, residential heating, hot water supply, air conditioning, and other industries. Fits these applications: Hydraulic, Hydropower, Wind power, Petrochemical, Ocean Going Ships, Metallurgical, Construction
Structure of plate heat exchanger
Plate heat exchanger [is composed of a group of corrugated stainless steel metal plates called heat transfer plate, the corners of the heat transfer plate have holes for the two fluids to pass through. The heat transfer plate is installed in a frame with a fixed plate and a movable pressing plate on the side and is clamped by clamping bolts. The heat transfer plates are equipped with sealing gaskets to seal the fluid channels and guide the fluid to alternately flow into the respective channels. The fluid flow rate, physical properties, pressure drop, and temperature difference determine the number and size of the heat transfer plates. The corrugated plate not only improves the degree of turbulence but also forms many supporting points, which are enough to withstand the pressure difference between the media. The heat transfer plate and the movable pressing plate are hung on the upper guide rod and positioned by the lower guide rod, and the rod end is fixed on the support column.
Principle of operation
The plate heat exchanger is a new type of high-efficiency heat exchanger made of metal plates with a certain corrugated shape. The structure includes gaskets, compression plates (movable endplates, fixed end plates), and frames (upper and lower guide rods). , The front pillar), the plates are sealed and guided by sealing gaskets, separating the cold and hot fluid channels, the cold/hot heat exchange medium flows through the respective channels, and heats the separated plates Exchange to reach the temperature required by the user.
The four corners of each plate have openings, which are assembled into a plate bundle to form a distribution pipe and a collection pipe for the fluid. After the heat exchange of the cold/heat medium, it flows back from the respective collection pipe and is recycled.
About plate material
1. Stainless steel: refers to steel that is resistant to weak corrosive media such as air, steam, and water, and chemically corrosive media such as acid, alkali, and salt, also known as stainless acid-resistant steel. In practical applications, steel that is resistant to weakly corrosive media is often called stainless steel, and steel that is resistant to chemical media is called acid-resistant steel. There is a certain difference in chemical composition between the two. The former is not necessarily resistant to corrosion by chemical media, while the latter is generally non-corrosive. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.
2. Corrosion resistance mechanism: Chromium is the basic element for the corrosion resistance of stainless steel. When the chromium content in the steel reaches about 12%, the chromium will interact with the oxygen in the corrosive medium to form a very thin oxide film on the surface of the steel (since Passivation film (Cr2O3), extremely difficult to dissolve in water, can further prevent oxygen and iron corrosion. In the same way, destroying the passivation film Cr2O3 means destroying its resistance to oxygen corrosion.
About plate heat exchanger gaskets
The gasket serves as a sealing element between the plates of the heat exchanger to prevent leakage of the plates. The quality of the gasket directly affects the quality and image of the heat exchanger. In the HVAC industry, gaskets are mainly rubber products, which are greatly affected by temperature and medium. Therefore, they are greatly affected by the formulation, the uniformity of the components, and the conditions of vulcanization and setting during the production process.
Requirements for gaskets:
The formula is scientific, and it must have the characteristics of anti-aging, anti-tear, and high resilience (reduce the reaction force caused by elasticity, and the plate is not easy to deform).
The size of the sealing contact surface is accurate, and the alarm signal hole is sensitive.
Adhesive-free structure, easy to disassemble and assemble.
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