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Converging type limekiln

A lime kiln and confluence flow technology, applied in lime production and other directions, can solve the problems of inability to simultaneously calcine large-grained and small-grained limestone materials, uneven heating of limestone, and large gas resistance of stone materials, so as to save equipment investment and avoid overheating. Burning and raw burning, the effect of complete heat utilization

Active Publication Date: 2011-09-28
SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the direction of the furnace gas flow in the shaft kiln is opposite to that of the stone material, that is, the stone material moves from top to bottom, and the furnace gas flows from bottom to top. Gas segregation phenomenon causes uneven heating of limestone and affects product quality
However, this technology cannot solve the problem of simultaneously calcining large-grained and small-grained limestone materials

Method used

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  • Converging type limekiln
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  • Converging type limekiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Confluence type lime kiln according to the present invention such as figure 1 As shown, it is mainly composed of a rectangular kiln body 15, a feed system, a discharge system, a combustion system, an air supply system and an exhaust gas discharge system. bring. The feed system includes feed conveyor, hopper 1 and feed lock 2, the discharge system includes discharge lock 13 and discharge conveyor, etc., the combustion system includes fuel pipelines and burners 9, and the air supply system includes blower 11 and Each control valve and the exhaust gas discharge system include a dust collector 5 , an induced draft fan 4 and a chimney 3 . The upper part of the kiln body is divided into three parts by two partition walls 17, the two outer cavities are coarse material bins 6, the middle cavity is a fine material bin 7, and the width of the coarse material bin is the fine material bin. 1.5 times the bin width. The kiln walls of the coarse material bins on both sides of the c...

Embodiment 2

[0024] Another embodiment of the present invention is as figure 2 As shown, this scheme is an improvement on the basis of Example 1. The kiln wall and the sub-fluid 10 of the two cooling bins 14 are provided with air holes, and the air holes on the kiln wall communicate with the gas collection device 22, and the gas collection device Connect the outlet of blower 11 through four-way valve 12. A feed lock 20 is provided in the middle of the cooling bins 14 on both sides. Other structures are the same as in Embodiment 1.

[0025] The operation mode of the cooling zone is that by controlling the action of the material lock 20 and the four-way valve 12, the cooling air enters the kiln body alternately from both sides. When the cooling air enters the left side cooling silo through the four-way valve 12, the other way is closed, the material lock 20 of the left side cooling silo is closed, and the material lock of the right side cooling silo is opened. The air enters the left coo...

Embodiment 3

[0027] The third embodiment of the present invention is as image 3 As shown, the calcining belts of the coarse-grain bins on both sides are respectively provided with two rows of burners 9, each row of 15 burners, the burners are solid fuel burners, and the fuel used is coal. The kiln wall with two cooling bins 14 and the sub-fluid 10 are provided with air holes, the air holes on the kiln wall communicate with the gas collecting device 22, and the gas collecting device is connected to the outlet of the blower 11 through a three-way valve 19f. The coarse grain bins on both sides of the calcination zone are provided with combustion air inlets 21, and the gas collectors 22 of the cooling bins on both sides of the cooling zone are connected to the combustion air inlets of the calcination zone through three-way valves 19d and 19c.

[0028] The operation process of this embodiment is that the cooling air enters the cooling silo on the left side from the air blower 11 to cool the li...

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Abstract

The present invention relates to a converging type limekiln which comprises a rectangular kiln body, a feed system, a discharge system, a combustion system, an air feed system and an exhaust emission system. The kiln body is divided into a preheating zone, a calcining zone, a converging zone and a cooling zone from up to bottom. The upper segment in the kiln body is divided into three parts by two partition walls. Two outer chambers are coarse material bins, and the middle chamber is a fine material bin. The kiln walls at two sides of the coarse material bins in the calcining zone are provided with combustion nozzles. The partition walls between the coarse material bins and the fine material bin are provided with gas holes. The chamber body at the lower segment of the kiln body is divided into two cooling material bins by a shunt object. The cross section at the upper part of the shunt object is conical. The calcining zone gas has the types of forward flow, counterflow and cross flow. The contact between the high-temperature gas and the limestone material is sufficient and uniform. The quality of the calcined lime is excellent and the large-particle limestone material and the small-particle limestone material can be calcined simultaneously. The gas after the lime product cooling is directly used as the calcining zone combustion-supporting air. The converging type limekiln of the invention further has the advantages of low device cost, high use factor of the residual heat, fuel saving and energy consumption reduction.

Description

technical field [0001] The invention relates to a device for calcining materials, in particular to a lime kiln device with a multi-chamber kiln body structure. Background technique [0002] Lime is an important building material, and also an important raw material in metallurgy and chemical industry. The prior art uses dolomite and limestone as raw materials, and adopts a vertical kiln with burning beams to calcinate lime. The disadvantage of this process is that the direction of the furnace gas flow in the shaft kiln is opposite to that of the stone material, that is, the stone material moves from top to bottom, and the furnace gas flows from bottom to top. Gas segregation phenomenon causes limestone to be heated unevenly and affects product quality. The applicant disclosed a utility model patent with the patent number ZL200320111077.3 for an internally and externally heated lime furnace. The combustion system of the lime furnace is provided with a rebar combustion tube an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/12
CPCY02P40/40
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD