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Heat accumulating type double-hearth lime kiln

A dual-chamber lime kiln, regenerative technology, applied in the direction of lime production, can solve the problems of uneven heating of limestone, inability to achieve high temperature calcination, and large gas resistance of stone materials, and achieves favorable heat balance, shortening residence time, and total smoke. The effect of low air volume

Inactive Publication Date: 2012-07-11
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 utility model patent cannot realize high-temperature calcination and solve the problems in the above-mentioned prior art

Method used

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  • Heat accumulating type double-hearth lime kiln
  • Heat accumulating type double-hearth lime kiln
  • Heat accumulating type double-hearth lime kiln

Examples

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Effect test

Embodiment 1

[0017] A regenerative double-chamber lime kiln of the present invention such as figure 1 As shown, it includes a feed system, a discharge system, a combustion system, an air supply system, an exhaust gas discharge system and two kiln bodies 8a and 8b arranged side by side. The cross section of the kiln body is circular. The two kiln bodies are respectively provided with a feed inlet 1, a preheating zone 9, a calcination zone 10, a high-temperature calcination zone 11, a cooling zone 6 and a discharge port 7, and the upper part of the cooling zone is provided with an annular channel 12 for communication. The two kiln bodies communicated through a ring channel. The upper part of the preheating zone is provided with a gas collecting device 2, which feeds combustion-supporting air during the calcination stage and discharges waste gas during the heat storage stage. The inlets of the gas collecting devices of the kiln body (8a, 8b) are respectively connected with the blower and the...

Embodiment 2

[0020] Another embodiment of the present invention is as image 3 , Figure 4As shown, the two kiln bodies are respectively provided with a feed port 1, a preheating zone 9, a calcination zone 10, a high-temperature calcination zone 11, a cooling zone 6 and a discharge port 7, and the upper part of the cooling zone is provided with an annular channel 12 for communication. The kiln bodies are connected through annular passages. The upper part of the preheating zone is equipped with a gas collecting device 2, and the inlets of the gas collecting devices of the kiln body (8a, 8b) are respectively connected with the blower and the exhaust gas discharge system, and the direction is changed through a three-way valve. The high temperature calcination zone 11 is provided with a gas heat accumulator 15, and the gas heat accumulator is connected to the high temperature preheating zone through a gas ring pipe 16 and an air inlet pipe 17. The other end of the gas heat accumulator is res...

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Abstract

The invention relates to a heat accumulating type double-hearth lime kiln. The heat accumulating type double-hearth lime kiln comprises a feeding system, a discharging system, a combustion system, an air supply system, an exhaust emission system and two kiln bodies arranged in parallel, wherein each kiln body is respectively provided with a feeding port, a preheating zone, a calcining zone, a cooling zone and a discharging port; the two kiln bodies are communicated with each other through an annular channel on the upper parts of the cooling zones; a gas collecting device is arranged on the upper part of the preheating zone; an inserting type burner is arranged on the calcining zone; a cooled air inlet is formed in the cooling zone; a high-temperature calcining zone is arranged between the calcining zone and the cooling zone; the high-temperature calcining zone is provided with a fuel gas heat accumulator or 1 to 5 rows of fuel gas heat accumulating burners and 1 to 5 rows of combustion-supporting gas heat accumulating burners; and the fuel gas heat accumulating burners and the combustion-supporting gas heat accumulating burners are arranged at intervals and annularly arranged at the periphery of the kiln wall. The high-temperature calcining zone performs calcination in a secondary combustion manner, so that sulfur content of the calcined product is reduced and the quality of the calcined product is improved. The high-temperature calcining zone adopts the heat accumulating burners and utilizes oxygen for supporting combustion, thereby facilitating the improvement on intensity of combustion and reducing the energy consumption.

Description

technical field [0001] The invention belongs to the technical field of calcination equipment, and relates to a regenerative double-chamber lime kiln, in particular to a regenerative double-chamber lime kiln equipped with a high-temperature calcination zone. 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. In the process of stone production and collection, some small particles of limestone will be produced. Small particles of limest...

Claims

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Application Information

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IPC IPC(8): C04B2/12
CPCY02P40/40
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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