The stainless steel metal plates of the plate heat exchanger adopt a mutually inverted mode when they are inserted and assembled. This can form a net-like contact, so that the fluid in the channel becomes a net-like fluid. The fluid flowing from one end to the other end is thought of as a one-way circulation loop, or reversely forms a diagonal flow to achieve the purpose of heat transfer. The plate heat exchanger is mainly composed of stainless steel heat transfer plates, sealing rubber gaskets, clamping bolts and compression plate complete machine frame. It is resistant to various corrosive media. The plates of the plate heat exchanger are independent components, and the heat exchange area and flow can be increased or decreased at will according to user requirements. After long-term use of the plate heat exchanger, dirt or deposits will appear from irregular cleaning.
(1) The plate heat exchanger is blocked.
Particles larger than 1.5~3mm in diameter are easy to block the plate passages, and the flow passage gap of the plate heat exchanger is small, which causes the heat exchange capacity of the equipment to be greatly reduced due to the blockage. Therefore, a coarse filter or a backwash device can be installed at the inlet of the medium according to the needs, which can effectively prevent the blockage of the plate heat exchanger.
(2) Scaling of plate heat exchanger
When the scaling is serious, the plate passage will be blocked, and the plate of the plate heat exchanger is designed with a large number of supporting points. Fouling can cause the heat transfer coefficient of the heat transfer equipment to decrease, and it is designed to turbulent flow and pressure support for the medium. Where solid debris is easy to accumulate, the side effect is that the fluid forms a local stagnation to generate dirt. The calcium and magnesium ions in the medium can easily form honeycomb-like dirt after precipitation at a suitable temperature.