Technical parameters and related knowledge of plate heat exchanger

1, plate heat exchanger number according to the characteristics of small and medium-sized blast furnace, the furnace body cooling soft water system with plate heat exchanger should be the number of 3 parallel, each flow is the maximum flow of 5O%, normal operation of the opening of a two.

2, according to the flow of water in the cooling wall of the reasonable flow rate, and focus on the latter part of the blast furnace wall heat preservation layer thinning, the rapid increase in heat transfer, according to the maximum heat transfer to determine the softening water flow.

3, import water softening heat exchanger temperature according to the existing experience of blast furnace soft water supply, water supply temperature of 35 to 40 DEG C, the blast furnace high production, the safe production of the most favorable, taking into account the summer cooling capacity of chilled water and cooling tower, water softening into blast furnace temperature in the summer the most unfavorable conditions should be less than 40 C, water softening furnace temperature should be less than 45 degrees Celsius, namely water softening heat exchanger into temperature should be 45 degrees, the heat exchanger temperature should be 40 degrees.

4, the heat exchanger water side pressure loss, the soft water system in addition to stop air cooler, heat exchanger plate into Wu, other parts unchanged, so the heat exchanger soft water side pressure loss shall be less than the original air cooler water side pressure loss. The original air cooler soft water side pressure loss is less than 0.05MPa, so plate heat exchanger soft side pressure loss must be less than '0.05M Pa.

5, heat exchanger plate material plate heat exchanger plate material basically uses stainless steel, titanium alloy two kinds. Because the titanium material price is 4 ~ 6 times of stainless steel, and the cooling system of the heat exchanger plate plate material of stainless steel can meet the requirements.

6. The thickness of heat exchanger plate thickness is inversely proportional to the heat transfer coefficient, the smaller the plate thickness, the better the heat transfer effect, but also easy to corrosion leakage. The plate thickness is 0.5 ~ 1.0mm, taking into account the manufacturing process, the level of operation and corrosion, scaling and other factors, the heat exchanger plate thickness should be selected from 0.7 to 0.9ram.

Each plate of AI Reed has at least two plates, and the heat transfer and pressure drop of the heat exchanger can be integrated by adopting the technology of thermal mixing. The inner bypass, the double channel technology and the unequal flow cross section assembly provide the perfect solution for the two sides of the medium flow rate difference.