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Heat storage type lime rotary kiln

A lime rotary kiln and regenerative technology, applied in the field of lime production devices and regenerative lime rotary kilns, can solve the problems of energy consumption restricting the development of rotary lime kilns, and reduce the cost of lime production, reduce energy consumption, and improve quality. Effect

Active Publication Date: 2014-02-12
SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High energy consumption limits the development of rotary lime kiln

Method used

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  • Heat storage type lime rotary kiln
  • Heat storage type lime rotary kiln
  • Heat storage type lime rotary kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Regenerative lime rotary kiln of the present invention such as figure 1 As shown, it includes two kiln bodies 16, two preheating chambers 4, kiln tail cover 11, cooling chamber 12, burner 10, blower 8, kiln head 9, cooling fan 13, feeding system 2 and exhaust gas discharge system, A burner 10 is arranged in the kiln head. The two kiln bodies are symmetrically arranged left and right, one end of the kiln body is connected to the cooling chamber through the kiln tail cover 11, and the other end is respectively connected to the outlet of the preheating chamber 4 through the feeding chamber 5. The inlet of the preheating chamber is respectively connected with the feed port 3 and the three-way valve 17 through a three-way pipe 18 . One of the other two paths of the three-way valve is connected to the blower through the air pipeline 7, and the other is connected to the exhaust gas discharge system; the cooling fan is connected to the lower part of the cooling chamber, and th...

Embodiment 2

[0026] Another embodiment of the present invention is as figure 2 As shown, the kiln body 16 is provided with a waste heat recovery device 19 and an induced draft fan 20 . The waste heat recovery device 19 is a cylindrical structure, located outside each kiln body of the rotary kiln, and installed coaxially with the kiln body. The waste heat recovery device is provided with an air inlet 23 and an air outlet 26, the air inlet 23 is located on both sides of the waste heat recovery device, the outlet of the waste heat recovery device is connected to the inlet of the induced draft fan 20 through a pipeline, and the outlet of the induced draft fan is connected to the cooling chamber 12 of the middle. The heat emitted by the outer wall of the kiln is recovered by the waste heat recovery device, and the air preheated by the waste heat recovery device enters the cooling chamber, and the heat of the cooling product is used to continue heating the air. In the cooling chamber 12, the ...

Embodiment 3

[0028] The third embodiment of the present invention is as image 3 As shown, the outlet of the induced draft fan is connected to the fuel preheater 21, the fuel pipeline passes through the fuel preheater to the burner 10, and the heat recovered by the waste heat recovery device passes through the fuel preheater 21 to preheat the fuel.

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Abstract

The invention relates to a heat storage type lime rotary kiln which comprises two kiln bodies, two preheating chambers, a kiln tail hood, kiln heads, a cooling chamber, burners, air blowers, a cooling fan, feeding systems and waste gas discharging systems. The two kiln bodies are in left-right symmetric arrangement or nonsymmetric arrangement, one end of each kiln body is connected with the cooling chamber through the kiln tail hood, the other end of each kiln body is connected with an outlet of each preheating chamber through a feeding chamber, inlets of the two preheating chamber are respectively connected with a feeding port and a three-way valve through a three-way pipe, one way of the three-way valve is connected with the corresponding air blower through an air pipeline, the other way of the three-way valve is connected with the corresponding waste gas discharging system, each kiln body is provided with a waste heat recovering machine, and air outlets of the waste heat recovering machines are connected to the cooling chamber or a fuel preheater. The two heat storage type preheating chambers and the two kiln bodies on the left and right sides, so that flue gas waste heat and lime finished product waste heat generated by the rotary kiln during calcining can be fully utilized, and energy consumption is lowered. The burners are arranged at multiple positions, temperature distribution of burning is more uniform, temperature gradient is lowered, and NOx content in flue gas can be effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of production equipment such as chemical industry, metallurgy and building materials, and relates to a lime production device, in particular to a regenerative lime rotary kiln. Background technique [0002] Lime rotary kiln is a kind of equipment for lime production. Compared with vertical kiln, beam kiln, sleeve kiln, etc., it has the advantages of calcining small particle size limestone, high activity of fired lime (activity can reach 350-400ml), It has the characteristics of high degree of mechanization, easy operation, and easy large-scale production, and has been widely used in the field of lime production in my country. According to the statistical data in 2010, the lime produced by the rotary kiln accounted for 47.84% of the production capacity of active lime (with an activity degree above 300ml). [0003] However, the energy consumption of the rotary kiln is larger than that of other lime kilns. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10
CPCY02P40/40
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD