Method for heating titanium strip cleaning acid liquor by using microwave heater

Abstract

The invention relates to a method for heating titanium strip cleaning acid liquor by using a microwave heater. In the method, the titanium strip cleaning acid liquor flowing through microwave heating equipment is directly heated in a non-contact mode by the microwave heating equipment through microwave energy radiated by the microwave heater, so that the acid liquor reaches the temperature needed by the technology in a circulating state, and a titanium strip passes through a pickling bath at a certain speed for pickling. The method has the advantages of capacities of directly heating the titanium strip cleaning acid liquor, having no heat exchange process, improving the thermal efficiency, achieving zero carbon emission, reducing the energy consumption and solving the problems of environmental pollution and energy waste brought by the use of boilers.

Description

technical field [0001] The invention relates to a method for heating solution with microwaves, in particular to a method for cleaning acid solution by heating a titanium belt with a microwave heater, and belongs to the technical field of microwave heating applications. Background technique [0002] In the cold-rolling and rolling production process of titanium coils, pickling is a necessary and important process. The main function of pickling is to remove the scale and pollutants on the surface of the hot-rolled titanium strip to obtain a titanium strip with a clean surface and avoid Defects occur during rolling. The pickling process includes a cleaning section, a pickling section and a rinsing section, respectively cleaning, pickling and rinsing the cold-rolled titanium strip. The pickling section solution is HNO 3 The mixed acid solution with HF is prepared according to a certain concentration ratio: HNO 3 The concentration is 100-220g / L, and the HF concentration is 10-...

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Problems solved by technology

The specific problems are as follows: 1. The graphite in the graphite heat exchanger has low impact resistance, so it is prone to damage during transportation, installation and specific operations, and requires frequent maintenance; 2. The flue gas generated by the combustion of boiler fuel contains soot , sulfur and nitrogen oxides and other harmful substances, as well as the noise pollution and water pollution generated by the boiler, which seriously endanger the environment and human health, and the daily maintenance cost of the boiler is high; 3. The heat is burned by fuel, and the boiler generates high-temperature steam. After pipeline transmission, the graphite heat exchanger is used to exchange heat for the pickling process solution. After multiple heat transfers, the heat utilization rate is very low, resulting in high production costs and a great waste of energy; 4. In the existing process engineering A large number of heat pipe networks, temperature adjustment, and pressure adjustment thermal systems have caused an increase in project costs; 5. Excessive carbon emissions. As the earth warms, the greenhouse effect will intensify. Excessive carbon emissions will reduce product competitiveness and seriously hinder Long-term development of the enterprise

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