The shell-and-tube heat exchanger requires a heat insulating layer

Date:2019-07-29

The frame type plate heat exchanger can loosen the plate bundle and loosen the plate for mechanical cleaning as long as the compression bolt is loosened, which is very convenient for the heat exchange process of the equipment to be cleaned frequently.

Small heat loss

In the plate heat exchanger, only the outer plate of the heat transfer plate is exposed to the atmosphere, so the heat loss is negligible and no heat preservation measures are required. The shell-and-tube heat exchanger has a large heat loss and requires a heat insulating layer.

Small capacity

It is 10%~20% of shell-and-tube heat exchanger. i. Large pressure loss per unit length Since the gap between the heat transfer surfaces is small, the heat transfer surface has irregularities, so the pressure loss is larger than that of the conventional smooth tube.

Not easy to scale

Because the internal is fully turbulent, it is not easy to scale. The fouling coefficient is only 1/3~1/10.k. of the shell-and-tube heat exchanger. The working pressure should not be too large, the medium temperature should not be too high, and it may leak the plate. The heat exchanger is sealed with a gasket. The working pressure should not exceed 2.5 MPa. The medium temperature should be below 250 °C, otherwise it may leak.

Easy to block

Since the passage between the plates is very narrow, it is generally only 2 to 5 mm. When the heat exchange medium contains large particles or fibrous substances, it is easy to block the passage between the plates.

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