High-corrosion-resistance heat exchanger

Abstract

The invention discloses a high-corrosion-resistance heat exchanger. The heat exchanger is made of copper alloy, the anti-corrosion treatment is carried out on each working face of the heat exchanger,the material for preparing the copper alloy comprises the following elements, in percentage by mass, of 0.07% of Zr, 0.05% of Cr, 0. 008% of La, 4.9% of Ni, 0.18% of Sn, 3.5% of Al and the balance Cuand inevitable impurities, the anti-corrosion treatment is carried out on each working face of the heat exchanger, specifically, an anti-corrosion anti-scaling coating is coated on each working face of the heat exchanger, the anti-corrosion anti-scaling coating comprises an inner layer with titanium elements and a titanium nano outer layer, wherein the thickness of the inner layer is 85-90 nm, thethickness of the titanium nano outer layer is 100-120 nm, and the inner layer is in compound contact with the working faces of the heat exchanger. The heat exchanger is ingenious and reasonable in process, the copper alloy with special anti-corrosion performance is used as a material, and the anti-corrosion anti-scaling coating is coated on the working faces of the heat exchanger, so that the effect of high corrosion resistance is achieved, the service life is prolonged, and popularization is deserved.

Description

technical field [0001] The invention belongs to the field of heat exchangers, in particular to a highly anti-corrosion heat exchanger. Background technique [0002] Heat exchangers are widely used in petrochemical, coal chemical, alumina, power plants, clean energy utilization and other industrial processes. It is composed of heat exchange tubes or heat exchange plates and shells. When used for heat exchange with liquid working fluid, especially if the liquid working fluid contains substances that are easy to corrode and scale, scaling and corrosion will occur during the long-term operation of the heat exchanger, which will bring huge losses to the production of the enterprise. At present, the liquid heat exchangers used in industry are usually made of stainless steel. Although the material cost and manufacturing cost are greatly increased to reduce corrosion, it still cannot fundamentally solve the anti-corrosion problem. If the content of sulfur ions and chloride ions in t...

AI Technical Summary

Problems solved by technology

Due to the extremely low heat transfer coefficient of scale, the thermal efficiency of the heat exchanger is continuously reduced

In addition, scale accumulates inside the heat exchanger for a long time, and it will also block the water inlet and outlet pipes, resulting in the problem of poor water outlet or no water outlet. Regular cleaning will cost the company a lot of manpower and material resources

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