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Secondary air nozzle of rotary kiln

A technology of rotary kiln and secondary air, applied in the direction of rotary drum furnace, combustion method, lighting and heating equipment, etc., can solve the problems of impeller and casing deformation, fan overcurrent, air duct deformation, etc., to avoid deformation or burning damage, prolong service life and improve production efficiency

Active Publication Date: 2010-08-18
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

The fuel coal sprayed into the kiln at high speed inevitably enters the hollow air passage in the nozzle from the nozzle opening. When the secondary air nozzle rotates with the kiln body, the fuel coal in the hollow air passage easily enters the external air supply air passage and fan Inside the casing, because the fuel coal is still in a high-temperature combustion state, the external air supply duct and the inside of the fan casing will be high-temperature, causing deformation and burning of the air duct, impeller and casing, and even causing overcurrent of the fan, and after the fan is damaged It is impossible to replace the secondary air fan online, which affects production efficiency; at the same time, the high-temperature radiant heat in the kiln can also directly radiate into the external air supply duct, making the external air supply duct continue to be high temperature, causing serious deformation of the air duct

Method used

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  • Secondary air nozzle of rotary kiln
  • Secondary air nozzle of rotary kiln
  • Secondary air nozzle of rotary kiln

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Embodiment Construction

[0022] As shown in Figures 1 to 4, a secondary air nozzle for a rotary kiln includes a nozzle air duct 3 fixed on the kiln skin 1 of the rotary kiln and communicated with the external air duct 2 of the rotary kiln. The heat-shielding member 4 and the heat-insulating material-shielding member 4 are located at the end where the nozzle air duct 3 connects with the external air duct 2 of the rotary kiln. The heat-insulating blocking member 4 can effectively isolate part of the radiant heat inside the rotary kiln, and prevent the fuel coal 5 in a high-temperature combustion state from entering the external air channel 2 of the rotary kiln and the fan casing from the air channel of the nozzle, so as to avoid the external air channel 2 of the rotary kiln. and the fan are deformed or burned due to the influence of high temperature, so as to ensure the long-term, continuous and normal operation of the external air duct 2 and the fan of the rotary kiln, thereby improving production effic...

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Abstract

The invention discloses a rotary kiln secondary air nozzle which comprises a nozzle air channel fixed on the kiln crust of the rotary kiln and communicated with the external air channel of the rotary kiln; a heat insulation retaining component is arranged in the nozzle air channel; the heat insulation retaining component is positioned on one end of the nozzle air channel, which is connected with the external air channel of the rotary kiln. The rotary kiln secondary air nozzle has the advantages of insulating part of the irradiation heat inside the rotary kiln and preventing the fuel in the high temperature combustion state from flowing into the external air channel of the rotary kiln.

Description

technical field [0001] The invention relates to a rotary kiln body air supply device, in particular to a rotary kiln secondary air nozzle. Background technique [0002] The existing secondary air nozzle of the rotary kiln is a hollow structure, the hollow air duct inside the nozzle, the external air supply duct and the casing of the secondary air fan are completely unblocked, and there is no obstruction in the middle of the duct. The fuel coal sprayed into the kiln at high speed inevitably enters the hollow air passage in the nozzle from the nozzle opening. When the secondary air nozzle rotates with the kiln body, the fuel coal in the hollow air passage easily enters the external air supply air passage and fan Inside the casing, because the fuel coal is still in a high-temperature combustion state, the external air supply duct and the inside of the fan casing will be high-temperature, causing deformation and burning of the air duct, impeller and casing, and even causing over...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L9/00F27B7/36F27D7/02
Inventor 贺新华王赛辉宁德乙朱飞丁智清李文辉
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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