Surface treatment system for recycling waste heat of cooling tower by high-temperature heat pump for aluminum processing and oxidation production line

Abstract

The invention discloses a surface treatment system for recycling waste heat of a cooling tower by a high-temperature heat pump for an aluminum processing and oxidation production line. The system comprises a high-temperature heat pump, a water circulating pump a, a hot water tank, plate-type heat exchangers, a water circulating pump b, a cooling water tank, a cooling tower, a water circulating pump c, a refrigerating unit, a water circulating pump d and a cold water basin. A small amount of electricity is consumed by the high-temperature heat pump, the waste heat of the cooling tower is used as a heat source, the temperature of the heat source is about 30 DEG C, hot water at 75 to 95 DEG C is prepared by the high-temperature heat pump, and the heating coefficient can reach more than 5.6, i.e. 5.6-kilowatt heat can be obtained by consuming 1-kilowatt electricity. If fuel is burnt to generate power, the heat efficiency is 32%, i.e. the utilization rate of the fuel is 179% and is much higher than the heat efficiency of a fuel boiler. The waste heat of the cooling tower is recycled to prepare hot water by the high-temperature heat pump, and the fuel boiler is replaced, so that energy can be saved, the operating cost and the energy are reduced, and additionally, the discharge of CO2, SO2, NOx and the like is reduced.

Description

technical field [0001] The invention relates to using a high-temperature heat pump to recover waste heat from a cooling tower to prepare hot water for providing hot water in a process tank for an aluminum material oxidation and coloring electrophoresis production line (or called an aluminum material surface treatment workshop), and belongs to the technical field of aluminum profile oxidation production. Background technique [0002] The surface treatment workshop of the aluminum profile oxidation production line not only needs to supply heat to some bath liquids, but also needs to supply cooling capacity to some bath liquids. The hot water system is used to maintain a high temperature environment of 25°C to 85°C for the sealing tank and hot water washing tank, while the cold water system is used to ensure a low temperature environment of 18°C ​​to 22°C for the oxidation tank and coloring tank. Traditional heating and cooling equipment are fuel boilers and refrigeration units...

AI Technical Summary

Problems solved by technology

The flue gas emission of fuel-fired boilers pollutes the atmospheric environment, and the efficiency is not high. The thermal efficiency of gas-fired boilers is generally about 80%, and the thermal efficiency of coal-fired boilers is generally 70%.

The refrigeration unit is used for refrigeration, and the cooling heat needs to be dissipated by the cooling tower. The cooling tower is equipped with a fan and a circulating water pump, and the power consumption is relatively large.

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