Because of its ventilation function, plate heat exchangers create heat while in use. There are two ways of ventilation. Let us go through the plate heat exchanger’s ventilation mode in detail!
1. Blast type: air goes through the fan before entering the tube bundle; the running cost is lower, and the turbulent flow created is advantageous to heat transfer, thus it is more commonly utilized.
2. Induced air type: air flows via the tube bundle before entering the fan. The air distribution is uniform, which allows for accurate temperature control of the plate heat exchanger unit, and the noise is low, which is the direction of growth.
The output temperature of the hot fluid is primarily regulated by modifying the air volume traveling through the tube bundle, which includes adjusting the inclination angle of the plate heat exchanger blades, the fan speed, and the degree of opening of the shutters. Hot air circulation or steam heating can be utilized to modify the fluid output temperature for fluids that condense and freeze easily in the winter.
When employing plate heat exchangers, these two ventilation systems can be chosen based on the equipment’s utilization.
Thermal protection effect of plate heat exchanger high temperature tube sheet:
We may use the plate heat exchanger’s advantages to finish the heat exchange since it is extremely efficient. The high temperature tube sheet can help with thermal protection within the device. Where is the thermal protection effect of the high temperature tube sheet implemented in the entire equipment?
1. When the plate heat exchanger’s gas flow rate is high and the gas also contains dust, especially abrasive grit, the heating surface is prone to erosion. High temperature corrosion will occur as a result of the high gas temperature. Hydrogen corrosion or chlorination may embrittle steel at high temperatures. If the proper preventive measures are not taken in this instance, the high-temperature and high-speed airflow erosion would undoubtedly harm the equipment.
2. The thickness of the high temperature tube sheet of the plate heat exchanger is often lowered in the design for thermal protection, and the butterfly tube sheet, elliptical tube sheet, spherical tube sheet, and flexible tube sheet are utilized to absorb some of the thermal stress. Second, as a protective lining for the shell and tube sheet of the take-over, a layer of refractory concrete and other heat-resistant materials with a thickness of approximately 100mm is employed, or a thin layer of high-nickel-chromium alloy steel protective lining is applied on top of the heat-resistant lining.
We have highlighted the thermal protection effect of the plate heat exchanger’s high temperature tube sheet in the introduction. The full thermal protection system can efficiently prevent heat loss. This has a significant impact on the heat exchange of the equipment.
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