S oot blowing method for automatically controlling waste heat utilization heat exchanger

Abstract

The invention discloses a waste heat utilization heat exchanger, with a tube bundle arranged in a diamond way, of a rotary cement kiln and a soot blowing method of the waste heat utilization heat exchanger. 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; the heat exchange tube bundle is arranged in a diamond way; the casing adopts a diamond structure; a soot blowing opening is formed on the casing; the soot blowing opening is connected with a soot blowing pipeline; a fan is connected with the interior of the soot blowing pipeline; the fan is connected with a central control unit; the central control unit controls the frequency of the fan by computing the thermal-conduction resistance of the heat exchange tube bundle. Tail gas of the rotary cement kiln enters the heat exchanger from the tail gas inlet, firstly passes through the heat exchange tube bundle which is arranged on the vertex of a first included angle of the heat exchange tube bundle arranged in the diamond way, secondly breadthwise scours the heat exchange tube bundle, then passes through the heat exchange tube bundle on the vertex of a second included angle of the heat exchange tube bundle arranged in the diamond way, and finally is discharged from the tail gas outlet. The heat exchange tube bundle is arranged in the diamond way, so that the heat exchanger has the characteristics that the heat-transfer capability is high, soot is difficult to deposit, the convective heat transfer effect is good, and the like, so that the heat transfer efficiency is maximized.

Description

technical field [0001] The invention relates to a high-efficiency heat exchanger for utilizing 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 wast...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of serious ash accumulation and poor convective heat transfer capacity existing in existing cement rotary kiln tail gas utilization heat exchange equipment, the present invention proposes a cement rotary kiln waste heat with tube bundles arranged in a diamond shape that is not suitable for ash accumulation and has a good convective heat transfer effect A heat exchanger is used, and a soot blowing method for the heat exchanger is provided at the same time

Images