CN216273808U - Double-chamber heat accumulating type lime kiln - Google Patents
Double-chamber heat accumulating type lime kiln Download PDFInfo
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- CN216273808U CN216273808U CN202122999736.2U CN202122999736U CN216273808U CN 216273808 U CN216273808 U CN 216273808U CN 202122999736 U CN202122999736 U CN 202122999736U CN 216273808 U CN216273808 U CN 216273808U
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Abstract
The utility model relates to a double-chamber heat accumulating type lime kiln, which comprises two kiln bodies with vertical kiln chambers, wherein the two vertical kiln chambers are communicated through a connecting channel, the cross section of each vertical kiln chamber is circular, and each vertical kiln chamber is divided into a preheating area, a roasting area and a cooling area from top to bottom. The inner wall of the upper part of the kiln body corresponding to the preheating zone is a first conical surface with the diameter gradually expanding downwards, the inner wall of the middle part of the kiln body corresponding to the preheating zone is a first cylindrical surface, and the inner wall of the lower part of the kiln body corresponding to the preheating zone is a second conical surface with the diameter gradually expanding downwards. The double-chamber heat accumulating type lime kiln can reduce the temperature of flue gas and reduce the fuel consumption.
Description
Technical Field
The utility model relates to the technical field of industrial kilns, in particular to a double-chamber heat accumulating type lime kiln.
Background
The flowing direction of the gas in the double-chamber lime kiln is different from that of the common lime kiln, and the two chambers of the double-chamber lime kiln respectively have the functions of a combustion chamber and a heat storage chamber. The functions of the two kiln chambers are repeatedly changed according to a certain period. The kiln body (combustion kiln chamber) is divided into a preheating zone (heat storage zone), a roasting zone and a cooling zone from top to bottom, and the functions of the kiln body are respectively preheating and roasting limestone and cooling burnt lime. In the preheating zone (heat accumulation zone), combustion air flows downwards and is preheated by hot limestone at the same time to raise temperature; when the limestone reaches the roasting area, the limestone and coal gas conveyed by the uniformly arranged spray guns are mixed and combusted, so that the roasting of the materials is realized; after roasting, the generated lime enters a cooling area, contacts lime cooling air fed from the kiln bottom, exchanges heat to reduce the temperature of the lime to 60-80 ℃, then enters a storage bin, and is discharged through a kiln bottom discharging device. After the lime cooling air and lime finish the heat exchange, the temperature rises and accumulates the heat accumulation amount, and rise to the connecting channel, mix with burning waste flue gas, enter the heat accumulation kiln chamber.
The existing double-hearth lime kiln generally adopts a straight cylindrical kiln body, has simple structure, stability and convenient building, but has the disadvantages of high fuel consumption, short service life of refractory materials, poor product quality and serious nodulation problem inside the kiln.
Therefore, the inventor provides the double-chamber heat accumulating type lime kiln by experience and practice of related industries for many years so as to overcome the defects of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double-chamber heat accumulating type lime kiln, which can reduce the temperature of flue gas and reduce the fuel consumption.
The utility model aims to realize the double-chamber heat accumulating type lime kiln, which comprises two kiln bodies with vertical kiln chambers, wherein the two vertical kiln chambers are communicated through a connecting channel, the cross sections of the vertical kiln chambers are circular, and the vertical kiln chambers are divided into a preheating area, a roasting area and a cooling area from top to bottom; the inner wall of the upper part of the kiln body corresponding to the preheating zone is a first conical surface with the diameter gradually expanding downwards, the inner wall of the middle part of the kiln body corresponding to the preheating zone is a first cylindrical surface, and the inner wall of the lower part of the kiln body corresponding to the preheating zone is a second conical surface with the diameter gradually expanding downwards.
In a preferred embodiment of the present invention, the inner wall of the upper portion of the kiln body corresponding to the roasting region is a third conical surface with a diameter gradually expanding downwards, and the inner wall of the lower portion of the kiln body corresponding to the roasting region is a second cylindrical surface.
In a preferred embodiment of the utility model, the angle between the generatrix of the third conical surface and the horizontal plane is the same as the angle between the generatrix of the second conical surface and the horizontal plane.
In a preferred embodiment of the present invention, an included angle between a generatrix of the second tapered surface and the horizontal plane is larger than an included angle between a generatrix of the first tapered surface and the horizontal plane.
In a preferred embodiment of the utility model, the two side wall lines of the kiln body corresponding in the longitudinal section of the cooling zone below the connecting channel are hyperbolic.
In a preferred embodiment of the present invention, the included angle between the tangent line corresponding to the position of the upper end point of the hyperbola and the horizontal plane is greater than 0 ° and less than 90 °.
In a preferred embodiment of the utility model, each kiln body comprises a first cylindrical structure with an open bottom and a second cylindrical structure with an open top, wherein the bottom of the first cylindrical structure extends into the second cylindrical structure from the open top; a preheating zone and a roasting zone are sequentially formed in the first cylindrical structure from top to bottom, and a cooling zone is formed in the second cylindrical structure and is positioned below the bottom end of the first cylindrical structure; the kiln wall at the top of the second tubular structure is a cylindrical kiln wall, and the cylindrical kiln walls of the two second tubular structures are connected through a connecting channel.
In a preferred embodiment of the present invention, a plurality of spray guns are uniformly arranged on the kiln body at intervals in the circumferential direction corresponding to the position of the first cylindrical surface.
In a preferred embodiment of the utility model, a feed inlet is arranged at the top of the kiln body, and a discharge outlet is arranged at the bottom of the kiln body.
In a preferred embodiment of the utility model, a combustion air inlet and a flue gas outlet are further arranged at the top of the kiln body, and a cooling air inlet is further arranged at the bottom of the kiln body.
From the above, compared with the straight cylindrical kiln body with the same inner diameter in the prior art, the lime kiln disclosed by the utility model has the advantages that the preheating region comprises the circular truncated cone region, the cylindrical region and the circular truncated cone region which are sequentially arranged from top to bottom, the spray gun is convenient to mount in the middle cylindrical region, the inner diameters of the upper circular truncated cone region and the lower circular truncated cone region corresponding to the kiln body are gradually enlarged from top to bottom and are in a bell mouth shape, the raw material amount is increased after the preheating region is enlarged, the heat storage capacity of the raw material can be improved in the heat storage kiln chamber, the combustion kiln chamber can improve the preheating temperature of combustion air, the flue gas temperature is further reduced, the fuel consumption is reduced by 5%, and the lime kiln is energy-saving and environment-friendly.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: the utility model provides a structural schematic diagram of a double-chamber heat accumulating type lime kiln.
FIG. 2: an enlarged view of one of the kiln bodies in figure 1.
The reference numbers illustrate:
1. a kiln body; 101. a first cylindrical structure; 102. a second cylindrical structure; 1021. a cylindrical kiln wall;
11. a first conical surface; 12. a first cylindrical surface; 13. a second tapered surface; 14. a third conical surface; 15. a second cylindrical surface; 16. a hyperbola;
2. a vertical kiln chamber; 21. a preheating zone; 22. a roasting zone; 23. a cooling zone;
3. a connecting channel;
4. a spray gun.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the present embodiment provides a double-chamber regenerative lime kiln, which includes two kiln bodies 1 having vertical kiln chambers 2, the two vertical kiln chambers 2 are communicated through a connecting channel 3, the cross section of the vertical kiln chamber 2 (i.e. the cross section of the vertical kiln chamber 2 along the vertical direction) is circular, and the vertical kiln chamber 2 is divided into a preheating zone 21, a roasting zone 22 and a cooling zone 23 from top to bottom. The inner wall of the upper part of the kiln body 1 corresponding to the preheating zone 21 is a first conical surface 11 with the diameter gradually expanding downwards, the inner wall of the middle part of the kiln body 1 corresponding to the preheating zone 21 is a first cylindrical surface 12, and the inner wall of the lower part of the kiln body 1 corresponding to the preheating zone 21 is a second conical surface 13 with the diameter gradually expanding downwards.
Therefore, compared with a straight cylindrical kiln body with the same inner diameter in the upper and lower directions in the prior art, the lime kiln in the embodiment is characterized in that the preheating zone 21 comprises a circular truncated cone area, a cylindrical area and a circular truncated cone area which are sequentially arranged from top to bottom, the middle cylindrical area is convenient for mounting the spray gun 4, the inner diameters of the upper circular truncated cone area and the lower circular truncated cone area corresponding to the kiln body 1 are gradually enlarged from top to bottom and are in a bell mouth shape, the raw material amount is increased after the preheating zone 21 is enlarged, the heat storage capacity of the raw material can be increased by the heat storage kiln chamber, the combustion kiln chamber can increase the preheating temperature of combustion air, the flue gas temperature is reduced, the fuel consumption is reduced by 5%, and the lime kiln is energy-saving and environment-friendly.
Furthermore, the inner wall of the upper part of the kiln body 1 corresponding to the roasting region 22 is a third conical surface 14 with a diameter gradually expanding downwards, and the inner wall of the lower part of the kiln body 1 corresponding to the roasting region 22 is a second cylindrical surface 15. It can be understood that the diameter D of the second cylindrical surface 15 > the diameter D3 of the kiln body 1 at the boundary of the preheating zone 21 and the roasting zone 22 (i.e. the lower end diameter of the second tapered surface 13, i.e. the upper end diameter of the third tapered surface 14) > the diameter D2 of the first cylindrical surface 12 > the upper end diameter D1 of the first tapered surface 11.
Thus, compared with the straight cylindrical kiln body 1 with the same inner diameter in the upper and lower directions in the prior art, the roasting area 22 in the embodiment comprises the circular truncated cone area and the cylindrical area which are arranged up and down, so that even if the limestone shrinks in volume after being calcined, the quantity of the materials at the lower part can be increased after the diameter of the roasting area 22 is expanded, the materials can be fully contacted with the flue gas, the heat loss is reduced, the fuel consumption is reduced, the furnace lining is protected, the service life of refractory materials is prolonged, and the service life of equipment is longer. The lower part of the firing zone 22 still adopts a cylindrical area, which is more convenient for manufacturing the connecting channel 3.
Preferably, the angle α 3 between the generatrix of the third conical surface 14 and the horizontal plane is the same as the angle α 2 between the generatrix of the second conical surface 13 and the horizontal plane. The angles of the two are the same, the inner wall of the kiln body 1 is gradually expanded according to the same proportion, the transition is more uniform, and the product quality is ensured.
In addition, the included angle α 2 between the generatrix of the second conical surface 13 and the horizontal plane is larger than the included angle α 1 between the generatrix of the first conical surface 11 and the horizontal plane, so that more filler can be filled in the roasting area 22, the material in the roasting area 22 can be easily filled, no gap exists between the material and the kiln wall, and the product quality can be improved.
Further, the two side wall lines of the kiln body 1 corresponding to the longitudinal section of the cooling zone 23 below the connecting passage 3 (i.e., below the bottom wall position of the connecting passage 3) (i.e., the longitudinal section of the cooling zone 23 in the vertical direction) are hyperbolic lines 16.
The cooling area 23 adopts a hyperbolic structure, and because the hyperbolic 16 is a smoother flow field, the inner wall of the kiln body 1 corresponding to the cooling area 23 is a smooth curve, so that the kiln body 1 is streamline, the resistance to materials is small, the materials are not easy to adhere to the kiln wall when falling down in the cooling area 23, the adhesion of finished powder is structurally prevented, the problem of accretion inside the kiln is avoided, and the operation rate of the lime kiln is improved.
Preferably, the included angle α 4 between the tangent line corresponding to the position of the upper end point of the hyperbola 16 and the horizontal plane is greater than 0 ° and less than 90 ° to effectively prevent the adhesion of the powder product.
More specifically, each kiln body 1 comprises a first cylindrical structure 101 with an open bottom and a second cylindrical structure 102 with an open top, wherein the bottom of the first cylindrical structure 101 extends into the second cylindrical structure 102 through the opening. The first cylindrical structure 101 forms a preheating zone 21 and a roasting zone 22 from top to bottom, and the second cylindrical structure 102 forms a cooling zone 23 in a region below the bottom end of the first cylindrical structure 101. The top kiln wall of the second cylindrical structure 102 is a cylindrical kiln wall 1021, and the cylindrical kiln walls 1021 of the two second cylindrical structures 102 are connected through a connecting channel 3.
It is understood that the first conical surface 11, the first cylindrical surface 12, the second conical surface 13, the third conical surface 14 and the second cylindrical surface 15 are all formed on the inner wall of the first cylindrical structure 101; an annular channel between the periphery of the bottom of the first tubular structure 101 and the cylindrical kiln wall 1021 at the top of the second tubular structure 102 is communicated with the connecting channel 3, so that flue gas can enter the heat storage kiln chamber from the combustion kiln chamber through the annular channel and the connecting channel 3; the channel diameter of the connecting channel 3 is the same as the height of the cylindrical kiln wall 1021, the bottom end position of the first cylindrical structure 101 is higher than the bottom wall position of the connecting channel 3, and the above-mentioned hyperbolic structure is formed on the inner wall of the second cylindrical structure 102.
Furthermore, a plurality of spray guns 4 are circumferentially and uniformly arranged on the kiln body 1 at intervals corresponding to the first cylindrical surface 12. A feed inlet, a combustion air inlet and a flue gas outlet are arranged at the top of the kiln body 1 (specifically, at the top of the first cylindrical structure 101), and a discharge outlet and a cooling air inlet are arranged at the bottom of the kiln body 1 (specifically, at the bottom of the second cylindrical structure 102). Whole two thorax heat accumulation formula limekilns constitute two thorax limekilns of curved cone formula, constitute by two vertical kiln thorax 2, two vertical kiln thorax 2 have the effect of burning kiln thorax and heat accumulation kiln thorax respectively, and change the function of kiln thorax repeatedly according to certain cycle, two kiln thorax communicate through being located the connecting channel 3 of vertical kiln thorax 2 middle and lower part, the kiln type is round platform, the combination of cylinder and hyperbola 16, can reduce the flue gas temperature, reduce fuel consumption, energy-concerving and environment-protective, help protecting the furnace wall, improve the refractory life, promote product quality, the problem of the interior nodulation of kiln has been avoided.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.
Claims (10)
1. A double-chamber heat accumulating type lime kiln comprises two kiln bodies with vertical kiln chambers, wherein the two vertical kiln chambers are communicated through a connecting channel, the cross sections of the vertical kiln chambers are circular, and the vertical kiln chambers are divided into a preheating area, a roasting area and a cooling area from top to bottom; it is characterized in that the preparation method is characterized in that,
the inner wall of the upper part of the kiln body corresponding to the preheating zone is a first conical surface with the diameter gradually expanding downwards, the inner wall of the middle part of the kiln body corresponding to the preheating zone is a first cylindrical surface, and the inner wall of the lower part of the kiln body corresponding to the preheating zone is a second conical surface with the diameter gradually expanding downwards.
2. The double-chamber regenerative lime kiln of claim 1,
the inner wall of the upper part of the kiln body corresponding to the roasting area is a third conical surface with the diameter gradually expanding downwards, and the inner wall of the lower part of the kiln body corresponding to the roasting area is a second cylindrical surface.
3. The double-chamber regenerative lime kiln of claim 2,
and an included angle between the generatrix of the third conical surface and the horizontal plane is the same as an included angle between the generatrix of the second conical surface and the horizontal plane.
4. The double-chamber regenerative lime kiln of claim 3,
and an included angle between the generatrix of the second conical surface and the horizontal plane is larger than an included angle between the generatrix of the first conical surface and the horizontal plane.
5. The double-chamber regenerative lime kiln of claim 2,
and two side wall lines of the kiln body corresponding to the longitudinal section of the cooling area below the connecting channel are hyperbolic curves.
6. The double-chamber regenerative lime kiln of claim 5,
and the included angle between the tangent line corresponding to the upper end point position of the hyperbola and the horizontal plane is more than 0 degree and less than 90 degrees.
7. The double-chamber regenerative lime kiln of claim 5,
each kiln body comprises a first cylindrical structure with an open bottom and a second cylindrical structure with an opening at the top, and the bottom of the first cylindrical structure extends into the second cylindrical structure from the opening;
the preheating zone and the roasting zone are sequentially formed in the first cylindrical structure from top to bottom, and the cooling zone is formed in the second cylindrical structure and is positioned below the bottom end of the first cylindrical structure; the kiln wall at the top of the second cylindrical structure is a cylindrical kiln wall, and the cylindrical kiln walls of the two second cylindrical structures are connected through the connecting channel.
8. The double-chamber regenerative lime kiln of claim 1,
and a plurality of spray guns are uniformly arranged on the kiln body at intervals in the circumferential direction corresponding to the first cylindrical surface.
9. The double-chamber regenerative lime kiln of claim 1,
the top of the kiln body is provided with a feeding hole, and the bottom of the kiln body is provided with a discharging hole.
10. The double-chamber regenerative lime kiln of claim 9,
the top of the kiln body is also provided with a combustion air inlet and a flue gas outlet, and the bottom of the kiln body is also provided with a cooling air inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122999736.2U CN216273808U (en) | 2021-11-30 | 2021-11-30 | Double-chamber heat accumulating type lime kiln |
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| CN202122999736.2U CN216273808U (en) | 2021-11-30 | 2021-11-30 | Double-chamber heat accumulating type lime kiln |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955956A (en) * | 2021-11-30 | 2022-01-21 | 中冶京诚工程技术有限公司 | Double-chamber heat accumulating type lime kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955956A (en) * | 2021-11-30 | 2022-01-21 | 中冶京诚工程技术有限公司 | Double-chamber heat accumulating type lime kiln |
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