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

A technology of supply device and cement kiln, which is applied in combustion method, combustion air/fuel supply, furnace and other directions, can solve problems such as energy consumption gap, and achieve obvious effect, improve coal saving effect, and save coal consumption.

Inactive Publication Date: 2014-10-22
TIANRUI GROUP CEMENT
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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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  • Method and device for supplying primary air for kiln head of cement kiln

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Embodiment Construction

[0012] In conjunction with the accompanying drawings, the most preferred process of the present invention and its device are described in detail;

[0013] The method for supplying primary air at the head of a cement kiln includes the steps of providing primary air to a burner by a Roots blower, and providing pulverized coal fuel and primary air to a rotary kiln from the burner, and also includes a step of heating the primary air. The Roots blower provides The primary air that comes out is heated by the heater to ensure that the air temperature of the primary air increases by 150~200℃, and the heated primary air enters the burner. The effect brought by the heating and supplying process of the primary air can be calculated from three aspects; first, the volume of the primary air expands due to the heating. After calculation, the primary air is heated from the normal temperature of 30°C to 250°C, and the original flow rate remains unchanged. On the basis of , its normal temperatu...

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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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B7/36F23L1/00F23L15/00
CPCY02E20/34
Inventor 贾华平孔祥忠王建义袁启亮周建奇张宏伟曹国钊陈丙武郭军社
Owner TIANRUI GROUP CEMENT
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