Limestone rotary kiln preheating device
A preheating device and limestone technology, applied in the field of limestone production, can solve the problems of complicated maintenance of rotary kiln, increased equipment cost of rotary kiln, and increased project area, so as to reduce the amount of nitrogen oxides produced and improve the utilization rate of heat. , the effect of increasing the floor space
Pending Publication Date: 2021-06-22
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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Problems solved by technology
However, increasing the diameter of the rotary kiln will double the difficulty of processing, and at the same time, the size of the cylinder section may exceed the limit of road transportation, which will greatly increase the transportation cost.
Increasing the length of the rotary kiln will, on the one hand, increase the land area of the project and increase the land cost of the project; The equipment cost increases, and at the same time, the inspection and maintenance of the rotary kiln becomes complicated and difficult
Method used
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[0025] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0026] Such as Figure 1-Figure 3 As shown, a limestone rotary kiln preheating device described in the present invention includes a waste gas heating type preheater 1; also includes a direct-fired preheater; the direct-fired preheater is composed of a feeding funnel 2, a burner 3. Composed of a fuel pipeline 4 and an air pipeline 5; the feeding funnel 2 is arranged at the feeding opening at the bottom of the waste gas heating type preheater 1, and a burner 3 is arranged on the side wall of the feeding funnel 2, and the The inner end of the burner 3 is provided with a nozzle, and the outer end is provided with a fuel inlet and an air inlet, the fuel inlet is connected to the fuel pipeline 4 , and the air inlet is connected to the air pipeline 5 .
[0027] The upper part of the kiln head cover 8 of the limestone rotary kiln is provided with an air ...
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The invention relates to a limestone rotary kiln preheating device. The preheating device comprises a waste gas heating type preheater, and further comprises a direct-fired preheater. The direct-fired preheater consists of a blanking funnel, a burner, a fuel pipeline and an air pipeline; the discharging hopper is arranged at a discharging opening in the bottom of the waste gas heating type preheater, a burner is arranged on the side wall of the discharging hopper, a spraying opening is formed in the inner end of the burner, a fuel inlet and an air inlet are formed in the outer end of the burner, the fuel inlet is connected with a fuel pipeline, and the air inlet is connected with an air pipeline. The pre-decomposition rate of limestone in the preheater can be effectively increased by the device, the calcination time of raw materials in the rotary kiln is shortened, and the diameter and the length of the rotary kiln can be reduced under the condition of the same yield; and the device is particularly suitable for large-scale limestone rotary kilns.
Description
technical field [0001] The invention relates to the technical field of limestone production, in particular to a limestone rotary kiln preheating device. Background technique [0002] At present, the kiln tail of the limestone rotary kiln is often equipped with a waste gas heating type limestone preheater, that is, the heat of the waste gas generated by combustion in the rotary kiln is used to pre-decompose part of the limestone in the preheater chamber. The application of exhaust gas heating limestone preheater shortens the calcination time of limestone in the rotary kiln, thereby shortening the length of the rotary kiln, reducing the energy consumption of the rotary kiln, and promoting the large-scale of the limestone rotary kiln. [0003] With the large-scale development of limestone rotary kiln, its daily output has reached more than 1200t; The diameter and length meet the output requirements. Increasing the diameter of the rotary kiln will double the processing difficu...
Claims
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IPC IPC(8): C04B2/10C04B2/02
CPCC04B2/10C04B2/02
Inventor 刘淳崔学文徐大鹏李根
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC