Comparison of detachable plate heat exchangers and tubular heat exchangers
Removable plate heat exchanger consists of a set of corrugated stainless steel metal plates called heat transfer plates, with holes in the corners of the heat transfer plates for the passage of two fluids for heat transfer. The tube heat exchanger is also made of stainless steel and belongs to the tube-and-tube heat exchanger, that is, a small-sized small tube is installed in a large-diameter thick tube, and these thin tubes are fixed on the tube sheets at both ends.
1. heat recovery: heat exchanger manufacturers plate heat exchangers to save heat energy, heat recovery efficiency: plate heat exchangers and tube heat exchangers have heat recovery section, but plate heat The exchanger is in the heat recovery section. The heat-sterilized hot material preheats the cold material just entering the heat exchanger and is cooled by itself. This process is called heat recovery. In modern plate heat exchangers, the heat recovery rate is up to 94%. The heat recovery section not only saves heat but also reduces the consumption of cooling water. The hot material heat-sterilized by the tube heat exchanger transfers the heat to the water first, and then to the material, and the heat recovery rate is low.
2. volume: plate heat exchanger consists of a set of stainless steel heat transfer plates sandwiched in the frame, compact structure, can accommodate a large heat transfer area in a small working volume, which It is one of the outstanding advantages of the plate heat exchanger, and the heating section, the cooling section and the heat recovery section are organically combined; and the volume of the tube-and-tube heat exchanger of the same heat transfer area is required. Big.
3. application: plate heat exchangers are generally used in high temperature short-time sterilization of pasteurization (72 ~ 75 ° C, 15s), after the material is pasteurized by plate heat exchanger, kill Pathogenic bacteria and harmful bacteria, and passivate some enzymes, the products need to be stored under refrigeration. Tube heat exchangers typically employ ultra-high temperature instantaneous sterilization, which is maintained at this temperature for a certain period of time to achieve commercial sterility levels, and then sterilised to fill the product in a sterile packaging container. UHT products can be distributed under non-refrigerated conditions for a considerable period of time without product degradation. The material is killed by a tube-type UHT system to kill all microorganisms that can cause deterioration of the product, allowing the product to be stored at room temperature for a period of time.
4. working hours and cleaning times: because the diameter of the tube is larger than the distance between the heat transfer plates, the tube heat exchanger does not need to be shut down frequently after startup, so the tube heat exchanger is The plate heat exchanger runs for a long time and has a large production capacity.
now plate heat exchangers are widely used in refrigeration, HVAC, air conditioning, oil cooling and other industries; heat treatment plants and brazing plants; automotive zero-build factory, mechanical hardware and injection molding machine manufacturers, home appliances air-conditioning Factory, shipbuilding industry, etc.