Small plate heat exchanger

Design characteristics of small plate heat exchanger

1. Stable energy saving: its heat exchange coefficient is 3000 ~ 4500kcal / m2 · ° C · h, which is 3 ~ 5 times higher than that of shell and tube heat exchanger.

2. Compact structure: the plates of the plate heat exchanger are closely arranged. Compared with other heat exchanger types, the plate heat exchanger occupies less area and space, and the plate heat exchanger with the same heat exchange area is only 1 / 5 of the shell and tube heat exchanger.

3. Easy cleaning and easy disassembly: the plate heat exchanger clamps the clamping plate by clamping bolts, so it can be opened and cleaned at any time. At the same time, it is not easy to scale because the plate surface is smooth and has high turbulence.

4. Long service life: the plate heat exchanger is pressed with stainless steel or titanium alloy plates, which can resist various corrosive media. The rubber pad can be replaced at will, and it is convenient for disassembly, assembly and maintenance.

5. Strong adaptability: the plate of plate heat exchanger is an independent element, which can be increased or decreased freely according to the requirements, with various forms; It can be applied to various and process requirements.

6. No liquid leakage. The sealing groove of the plate heat exchanger is provided with a liquid leakage channel, and various media will not collude. Even if there is leakage, the media will always be discharged outward.

Key points of product selection

1. The control parameters of plate heat exchanger are heat exchanger material, working pressure, design temperature, etc.

2. When selecting the heat exchanger, try to make the side with small heat exchange coefficient get a large flow rate, and try to make the heat exchange coefficients on both sides of the two fluid heat exchange surfaces equal or similar, so as to improve the heat transfer coefficient. The temperature of the fluid heated by the heat exchanger shall be 10 ℃ lower than the saturation temperature under the outlet pressure of the heat exchanger and shall be lower than the working temperature of the water pump used for secondary water.

3. The fluid containing sediment and dirt should enter the heat exchanger after filtration.

4. When the plate heat exchanger is selected, the flow rate at the interface of the fluid on the side with small temperature difference should not be too large, which should meet the requirements of pressure drop.

5. For the case of large flow and small allowable pressure drop, the plate type with small resistance shall be selected. On the contrary, the plate type with large resistance shall be selected.

6. removable type or electric welding type shall be selected according to the fluid pressure and temperature.

7. plates with too small veneer area should not be selected to avoid excessive number of plates, small flow velocity between plates and reduced heat transfer coefficient.

8. The heat exchange medium of plate heat exchanger should not be steam.