Plate for the five analysis

The plate usually made of grooved or corrugated medium, activity in the flow channel is three-dimensional activities with complex structure, its activities and activities are changing the direction of speed, caused a great disturbance in the low Reynolds number (Re=50~200) can induce turbulence (and tubular heat exchanger is the Reynolds number reached more than 2000). Due to the large disturbance of thinning the thickness of liquid film, can prevent impurities deposited on heat transfer surface adhesion, thereby reducing the fouling resistance, and the thickness of the plate is only 0.6~0.8mm, the heat resistance is small, in the heat exchanger, cold and hot fluid respectively from both sides of the plate through the fluid flow is small, no tube shell heat exchanger is that the total heat transfer coefficient of bypass flow, so high. In the case of water / water as heat transfer medium, the total heat transfer coefficient of plate heat exchanger can reach 8360~25080kJ/m2 *, H = C, the heat transfer coefficient of shell and tube heat exchanger is 3~5 times, but the equipment volume is only about 30% of the shell and tube heat exchanger.

1, pressure loss: in the case of equal heat supply carrier, after the heat exchanger pressure drop significantly, the water pressure from the original 1.4MPa to 1.6MPa.

2, the consumption of steam: steam consumption decreased significantly, from the original 1.11kg/s down to 0.97kg/s, saving steam per hour: (1.11-0.97) * 3600/1000=0.504t.

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3, the heat transfer effect: in the case of reducing the consumption of steam, heat transfer is greatly improved, the water supply temperature from the original 92 degrees to 95 degrees C.

4, maintenance workload: before the transformation, each operation cycle, for shell and tube heat exchanger fouling, significantly reduced the effect of heat transfer, need dismantling, cleaning tube shell heat exchanger, and in maintenance, remove the insulation, core pulling work needs. After the transformation of the operation of the two cycles before the demolition of a check, and disassembly is very convenient, just loosen the clamping screw, exposing the plate, you can clean.

5, covers an area of structure of plate heat exchanger is very compact, and the temperature reducing device is smaller in size (300; L=1500), arranged in the heat exchanger above, and combined into one organic heat exchanger, which only covers an area of shell and tube heat exchanger 1/4.