Broad passage plate heat exchanger heat radiation board and its surface intensifying process

Abstract

The invention relates to a heating panel of a wide channel plate type heat exchanger and a surface strengthening technique thereof. The heating panel with two plates which are combined together consists of a flat section at the two ends, a middle expanding section and an inclined radiating section, wherein, the inside of the middle expanding section is provided with a water flow channel, the outside surfaces of the flat section at the two ends and the inclined radiating section are provided with an erosion-resistance reinforced layer consisting of a layered high hardness alloy powder spraying layer and a high strength resin plugging layer. The surface strengthening technique adopts the supersonic spraying technique and the oxyacetylene spraying technique in the flame spraying technique; the erosion-resistance reinforced layer consisting of the layered high hardness alloy powder spraying layer and the high strength resin plugging layer is sprayed on the erosion working surface of the heating panel, thereby improving the surface hardness and the abrasion resistance of a stainless steel plate and contributing to improving the product quality of the heat exchanger, prolonging the service life and improving the working stability.

Description

technical field [0001] The invention relates to a metal member surface strengthening treatment technology, in particular to a heat dissipation plate of a wide-channel plate heat exchanger with high corrosion resistance and erosion resistance and a surface strengthening process suitable for a liquid fluid cooling system. Background technique [0002] In the alumina production process, wide-channel plate heat exchangers are usually used to cool the aluminum hydroxide feed liquid in the alumina degradation process. The main body of the wide-channel plate heat exchanger is composed of a base and a box. The inlet and outlet of liquid and the left and right bulkheads with the function of guiding the material liquid to change direction, the inlet and outlet of circulating water for cooling and the front and rear baffles with the function of guiding the flow of water. The core body of the heat exchanger is expanded, with hollow water flow channels inside, flat ends, and stainless st...

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Problems solved by technology

Because in the prior art, the radiator plates are all made of stainless steel with anti-corrosion function, but in practice, it is found that although the surface of the stainless steel plate is smooth, once it is in the state of being always eroded by the high-speed flowing aluminum hydroxide liquid Under working conditions, its surface hardness is not ideal, and it is easy to have severe surface wear and pitting, resulting in water leakage and affecting the working life of the heat exchanger. Therefore, the existing plate heat exchanger generally has working reliability. , poor stability, short effective life and heavy maintenance workload during the working process, etc., from the perspective of economy and practicability, it is still not ideal

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