Plate Heat Exchanger Detailed Introduction
Working Principle
A plate heat exchanger consists of a set of corrugated metal plates with four corner holes for the passage of two liquids undergoing heat transfer. The metal plates are mounted within a frame with a fixed plate and a movable clamping plate on one side, and are clamped together with bolts. Sealing gaskets on the plates seal the fluid passages and guide the fluids to flow alternately into their respective passages, forming heat exchange. The flow rate, physical properties, pressure drop, and temperature difference of the fluids determine the number and size of the plates. The corrugation of the plates not only increases turbulence but also creates numerous support points sufficient to withstand the pressure difference between the media. The metal plates and the movable clamping plate are suspended on an upper guide rod and positioned by a lower guide rod, the ends of which are fixed to support columns. However, if one or both liquids pass through the heat exchanger more than once, the connection should be made on the fixed plate and the movable clamping plate. In most cases, a single-pass connection is used, and all piping is connected to the fixed clamping plate. To inspect and open the heat exchanger, it is not necessary to disassemble the piping.
Versatile Operating Condition Selection
A wide variety of plate types, angles, and groove depths allow for diverse combinations to create a suitable heat exchanger for specific operating conditions. The plate positioning system, single-sided flow design, and special clamping dimension markings facilitate installation, piping, operation, and maintenance. Heat exchangers are available in various materials, such as stainless steel, titanium, or other special alloys, to meet diverse industrial needs. Thermal mixing modes are also available. By changing the flow pattern or increasing the number of flow channels, countless combinations can be achieved, from single counter-current flow of two fluids to multi-flow flow of three or more fluids. This provides designers with reasonable choices to meet different operating conditions.
Visible Economic Benefits
Plates are uniformly molded using high-precision molds. This reduces physical stress on the plates and improves plate uniformity, significantly extending plate lifespan. The plates are easily accessible for inspection and manual cleaning. In many cases, counter-current flushing can be used for cleaning, requiring minimal time for routine cleaning and no specialized personnel training. All series use a non-adhesive design, reducing operating and maintenance costs and facilitating repairs. Heat transfer and pressure can be adjusted by combining plates to achieve a good heat transfer coefficient, thereby reducing equipment investment; it is economical because its high heat transfer coefficient and simple installation and maintenance greatly reduce initial investment and operation and maintenance costs.
