Rotary cement kiln waste heat utilizing heat exchanger with protrusions

Abstract

The invention discloses a rotary cement kiln waste heat utilizing heat exchanger with protrusions. The heat exchanger comprises a heat exchanging pipe bundle, a tail gas inlet, a tail gas outlet and a shell. The heat exchanging pipe bundle is arranged in the shell, the tail gas inlet and the tail gas outlet are formed in the upper portion and the lower portion of the shell respectively and used for inputting tail gas to the shell and outputting the tail gas out of the shell. The outer walls of all heat exchanging pipes in the heat exchanging pipe bundle are provided with the protrusions, and the protrusions farthest from the tail gas inlet are highest. The outer walls of the heat exchanging pipes of the heat exchanger are provided with the protrusions, the heat exchanger has the advantages that the heat exchanging pipes are heated evenly, heat exchanging efficiency is high, and the heat transfer capability is high, the heat exchanging efficiency is maximized, and therefore energy sources are saved.

Description

technical field [0001] The invention relates to a heat exchanger for utilizing waste heat of tail gas of a cement rotary kiln, and belongs to the technical field of heat exchangers for waste heat utilization. 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 tail gas produced by cement rotary kiln has high dust concentration and poor quality. The waste heat power generation system for cement rotary kiln can r...

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Problems solved by technology

[0005] Aiming at the problems of uneven heating and serious ash accumulation of the heat exchange tubes existing in the existing cement rotary kiln tail gas utilization heat exchange equipment, the invention proposes a heat exchange tube with uniform heating, high heat exchange efficiency, less ash accumulation and soot blowing effect Good setting of raised cement rotary kiln waste heat utilization heat exchanger, and at the same time provide a soot blowing method for the heat exchanger

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