Semi-welded plate heat exchanger is especially provided for heating and cooling of corrosive media, widely used in ammonia refrigeration, sulphuric acid, caustic soda, petrochemicals, metallurgy, machinery, pharmaceuticals, food and other industrial fields, especially for the evaporation and condensation of refrigerants such as ammonia and Freon, for chemical and general process heat exchange of corrosive media to the gasket is also the ideal heat exchange equipment.
First, Working principle
The structure of the semi-welded plate heat exchanger is that each of the two corrugated plates is positioned back-to-back and laser welded together as a "box" along the sealing grooves designed for the semi-welded PHE gaskets. The semi-welded plates of the PHE are specifically designed for corrosive media and this construction has a welded seal on one side and a gasket seal on the other, eliminating the risk of corrosion of the seal. Sensitive media flow through the welded flow channels and conventional media flow through the conventional flow channels for heat transfer.
Second, the advantages
1、Laser welding a safe and efficient
The use of mature laser welding technology, then sealed with gaskets, high heat transfer efficiency, long service life, not easy to leak, easy access to maintenance, high safety factor.
2、Plate material a high temperature and high pressure resistance
Semi-welded plate heat exchanger plate using 304/316L/titanium plate/hastelloy high strength corrosion-resistant materials pressed, fearless of high corrosion and high temperature media, high pressure 5.0MPA.
3、No bonding rubber gasket design a seal for a long time, high corrosion resistance
As the neoprene sealing gasket has a high corrosion resistance, so the laser half-welded plate heat exchanger using this material as the raw material for the gasket, no bonding system to install the gasket in a specially designed groove, so that the contact area between the gasket and the medium is reduced to a minimum, extending its service life. The gasket also has the advantage of easy cleaning and good resistance to thermal stress.
4、Unique flow channel design to enhance heat transfer
The flow path design can increase the turbulent strength of the medium flowing into the plate heat exchanger, enhancing the heat transfer effect and reducing the corresponding pressure loss. In order to meet the requirements of different working conditions, we have different plate types to choose from.
5、Adjustable size for easy disassembly and installation
Simple disassembly, the gasket can be closed plate disassembly for cleaning or cleaning or plate group replacement. Simple installation, simple maintenance. Can be cleaned and repaired, long service life, low running costs. Highly malleable and flexible adjustment. Heat exchange can be adjusted by increasing or decreasing the number of plates.
Application industries
1、Refrigeration, air-conditioning and HVAC industry: it can be used as evaporator gas subheater, liquid subcooler, heat recycler, etc;
2、Chemical industry: heating, cooling, evaporation, condensation process;
3, metallurgical industry: rolling mills, continuous casting machine cooling machine lubricating oil cooling, circulating water cooling;
4、Electric power industry: transformer oil, turbine oil cooling;
5, light textile and paper industry: waste gas, waste liquid waste heat utilization;
6、District centralized heating: steam-water heating, intermediate heat exchange stations, secondary system water heating;
7, pharmaceutical industry: water for injection, plasma manufacturing.
Semi-welded plate heat exchanger, is widely used in food, medicine, municipal water supply, metallurgy, power and chemical industries.
