Waste heat utilization heat exchanger, with different tube bundle intervals and bulge densities, of rotary cement kiln

Abstract

The invention discloses a waste heat utilization heat exchanger, with different tube bundle intervals and bulge densities, of a rotary cement kiln. The heat exchanger comprises a heat exchange tube bundle, a tail gas inlet, a tail gas outlet and a casing, wherein the heat exchange tube bundle is arranged in the casing and is arranged in a diamond way; the casing is provided with a diamond structure matched with the heat exchange tube bundle which is arranged in the diamond way, and is called a diamond casing; the tail gas inlet is formed in a first included angle position of the diamond casing; the tail gas outlet is formed in a second included angle position of the diamond casing; a first included angle and a second included angle of the heat exchange tube bundle arranged in the diamond way are opposite angles; a third included angle and a fourth included angle of the heat exchange tube bundle arranged in the diamond way are opposite angles; heat exchange tube intervals from the tail gas inlet to a connected line between the third angle and the fourth angle are continually reduced; heat exchange tube intervals from the connected line between the third angle and the fourth angle to the tail gas outlet are continually increased. As the heat exchange tube intervals of the heat exchanger from the tail gas inlet to the tail gas outlet are firstly reduced and then increased, the heat exchanger ensures that the tail gas speed keeps constant, reduces the phenomenon of ash deposition, and achieves purposes of environment protection and energy conservation.

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. 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 recover and reuse the waste ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of serious ash accumulation existing in the existing cement rotary kiln tail gas utilization heat exchanger, the present invention proposes a cement rotary kiln waste heat utilization heat exchanger with different tube bundle spacing and protrusion density that is not easy to ash accumulation

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