Method and device for supplying primary air for kiln head of cement kiln

Abstract

The invention discloses a method and a device for supplying primary air for a kiln head of a cement kiln. A step of heating the primary air is additionally carried out in a process. The device comprises a Roots blower, a primary air pipe, a combustor and a heating pipeline. The primary air pipe is connected with an air outlet of the Roots blower and is connected with the heating pipeline, an air outlet of the heating pipeline is connected with an air inlet of a coal injection pipe of the combustor, the heating pipeline is arranged on the top of an intermediate-temperature section of a grate cooler, and the primary air in the heating pipeline is heated by afterheat air in clinker which is cooled by the grate cooler. The method and the device have the advantages that a scheme for supplying the primary air for the kiln head of the cement kiln is optimized and starts with regulating and controlling the temperature of the primary air, accordingly, energy consumption in production procedures can be reduced, benefits can be indirectly increased for enterprises, the quality of the clinker can be improved, and the clinker yield can be increased.

Description

technical field [0001] The invention relates to a cement production process, in particular to a primary air supply method and a supply device for the kiln head of a cement kiln. Background technique [0002] At present, the kiln head burner is required in the new dry cement production process. It has two functions. One is to transport pulverized coal fuel into the kiln; The internal high temperature secondary air is mixed to facilitate the rapid diffusion and combustion of pulverized coal. The primary air of the existing burner is the normal temperature air provided by the Roots blower. In the actual production process, the technicians found that due to the influence of parameters such as the temperature and air volume of the primary air supplied by the kiln head of the cement kiln, the energy consumption in production is also very high. There is a big gap, and how to optimize the process to reduce energy consumption is a technical problem that needs to be solved urgently. ...

AI Technical Summary

Problems solved by technology

The primary air of the existing burner is air at normal temperature provided by the Roots blower. In the actual production process, the technicians found that due to the influence of parameters such as the temperature and air volume of the primary air supplied by the cement kiln head, the energy consumption in production is also very large. How to optimize the process to reduce energy consumption is an urgent technical problem to be solved

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