Double-tube-bundle split heat-storage heat exchanger utilizing waste heat of rotary cement kiln

Abstract

The invention provides a heat-storage heat exchanger utilizing waste heat generated in the cement producing process and particularly relates to a double-tube-bundle split heat-storage heat exchanger utilizing the waste heat of a rotary cement kiln. The heat exchanger comprises a first tube bundle, a second tube bundle, a high-temperature flue gas inlet, a high-temperature flue gas outlet, a low-temperature working medium inlet, a low-temperature working medium outlet and a shell. The first tube bundle and the second tube bundle are arranged in the shell. The first tube bundle is used for circulation of flue gas generated in the cement producing process. The second tube bundle is used for circulation of low-temperature working media. The first tube bundle and the second tube bundle are arranged in a crossed mode. The flue gas enters the high-temperature flue gas inlet, passes through the first tube bundle and then is exhausted out of the high-temperature flue gas outlet. The low-temperature working media enter the low-temperature working medium inlet, pass through the second tube bundle and then are exhausted out of the low-temperature working medium outlet. Heat storage materials are arranged in the space outside the first tube bundle and the second tube bundle. Through the double-tube-bundle split heat-storage heat exchanger, the waste heat generated in the cement producing process can be fully utilized, so that heat exchange efficiency is maximized, energy is saved and the purposes of environmental protection and energy conservation are achieved.

Description

technical field [0001] The invention relates to a regenerative heat exchanger for utilizing waste heat in a high-efficiency cement production process, and belongs to the field of heat exchangers of F28d. Background technique [0002] With the rapid development of my country's economy, energy consumption is increasing day by day, and the problem of deteriorating urban air quality is becoming more and more prominent. It is urgent to save energy and reduce the emission of harmful environmental substances. In the common thermal power field, one of the main reasons for high energy consumption and serious pollution is that the exhaust gas temperature of the flue gas is too high, which wastes a lot of energy and causes environmental pollution. The cement industry is a high energy consumption and high pollution industry. The waste heat power generation system in the cement industry can recover and reuse the waste heat of exhaust gas to achieve the purpose of energy saving and emiss...

AI Technical Summary

Problems solved by technology

However, the existing problems are that the structure of the heat storage and heat release system is complex, the heat exchanger for heat storage and heat release is large in size and high in cost, so it is necessary to improve the heat exchange equipment for the heat storage process

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