Serpentine pipe bundle and heat exchange cover waste heat recovery device

Abstract

The invention provides a serpentine pipe bundle and a heat exchange cover waste heat recovery device, and belongs to the field of cement kiln waste heat power generation. According to the serpentine pipe bundle and the heat exchange cover waste heat recovery device provided by the invention, hot water heat exchangers are arranged in flues, leading to a chimney, of a kiln head waste heat boiler anda kiln tail waste heat boiler. Cold water is introduced into the hot water heat exchangers from a cold water pipe, the cold water exchanges heat with flue gas in the hot water heat exchangers, the cold water is changed into hot water after heat exchange; the hot water is secondarily heated through a heat exchange cover installed on the barrel body of a cement kiln, thus water temperature is increased again; the hot water heated twice is conveyed to a hot air curtain through a hot water pipe, heat exchange between outdoor air and the hot water is completed in the hot air curtain; the heated air is led into a grate cooler, and output high-temperature flue gas is conveyed to the waste heat boilers. According to the serpentine pipe bundle and the heat exchange cover waste heat recovery device, not only the influence caused by weather on power generation can be avoided, but also temperature of the flue gas at an inlet of a superheater at the normal condition can be improved, generating capacity of boilers at the kiln head and the kiln tail are increased, emission of the hot flue gas to the air is also reduced, and environmental protection is facilitated.

Description

technical field [0001] The invention relates to a waste heat recovery device for a serpentine tube bundle and a heat exchange cover, and belongs to the field of waste heat power generation of a cement kiln. Background technique [0002] With the development of the cement industry, the energy-saving technology level of the cement industry in developed countries has developed rapidly. The low-temperature waste heat is recycled in the cement production process, and the heat energy utilization rate of cement clinker has been greatly improved. Influenced by the limitations of the environment and the awareness of energy conservation, there are still a large number of waste heat resources that have not been fully utilized, and the phenomenon of energy waste is still very prominent. [0003] Cement production has a strong consumption and dependence on electric energy, and the growth of the total amount of cement has played a role in promoting the growth of the total electricity cons...

AI Technical Summary

Problems solved by technology

On the one hand, the development of coal power will accelerate the mining and consumption of limited resources such as coal; on the other hand, coal power production produces a large amount of CO 2 and other greenhouse gases, exacerbating the environmental pollution of the atmosphere

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