CN210855857U - Energy-saving decomposing furnace for cement production - Google Patents
Energy-saving decomposing furnace for cement production Download PDFInfo
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- CN210855857U CN210855857U CN201921897255.7U CN201921897255U CN210855857U CN 210855857 U CN210855857 U CN 210855857U CN 201921897255 U CN201921897255 U CN 201921897255U CN 210855857 U CN210855857 U CN 210855857U
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Abstract
The utility model discloses an energy-saving decomposing furnace for cement production, which comprises a furnace body and a combustion chamber, wherein the top of the furnace body is provided with a raw material inlet, and the bottom of the furnace body is provided with a discharge hole; the combustion chamber is communicated with the bottom of the furnace body and is connected with a pulverized coal conveying mechanism; the furnace body comprises an outer shell and an inner shell, and an inverted U-shaped decomposition cavity is arranged between the outer shell and the inner shell; a spiral guide plate is arranged in the decomposition cavity; the outer shell is provided with a plurality of coal powder feeding holes communicated with the discharging channel, each coal powder feeding hole is connected with a coal powder conveying mechanism, and the lengths of the discharging channels between every two adjacent coal powder feeding holes are equal. This dore furnace is through setting up more buggy conveying mechanism, and a plurality of buggy conveying mechanism's evenly distributed outside the furnace body, can carry the buggy to decomposing the intracavity dispersedly, makes the buggy be full of the decomposition chamber uniformly, guarantees that the heat that each position in decomposition chamber produced is even, improves the utilization ratio of buggy combustion heat, reduces the energy consumption.
Description
Technical Field
The utility model belongs to cement manufacture equipment field, especially an energy-saving dore furnace is used in cement manufacture.
Background
The cement decomposing furnace is a device which disperses and suspends raw meal in airflow and enables the fuel combustion and the calcium carbonate decomposition process to occur in a short time (generally 1.5 to 3 seconds), the fuel combustion directly heats the raw meal, and the heating efficiency is high.
The existing cement decomposing furnace comprises a furnace body and a combustion chamber, raw materials are introduced into the furnace body from the top of the furnace body, coal powder is adopted as fuel, a small part of coal powder is firstly conveyed to the combustion chamber by air, and is conveyed to the interior of the furnace body from the bottom of the furnace body through the combustion chamber, most of coal powder is conveyed to the interior of the furnace body from the top of the furnace body by flowing air, and is ignited by the coal powder burnt in the interior of the furnace body, so that the raw materials can be heated and decomposed. Because calcium carbonate decomposition needs to absorb a large amount of heat, the energy consumption is very high, in the cement production process, the energy consumption of the decomposing furnace accounts for 60% of the total energy consumption, the existing decomposing furnace only has two coal dust inlets, the condition of uneven coal dust distribution can occur, and because the furnace body space is large, coal dust and raw materials are difficult to fully mix, the heat generated by coal dust combustion cannot be fully utilized, and the decomposition rate of the raw materials is not favorable for ensuring.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an energy-saving dore furnace is used in cement manufacture can make the buggy distribute in the furnace body more evenly.
The purpose of the utility model is realized like this: the energy-saving decomposing furnace for cement production comprises a furnace body and a combustion chamber, wherein the top of the furnace body is provided with a raw material inlet, and the bottom of the furnace body is provided with a discharge hole; the combustion chamber is communicated with the bottom of the furnace body and is connected with a pulverized coal conveying mechanism;
the furnace body comprises a cylindrical outer shell and an inner shell, a decomposition cavity is arranged between the outer shell and the inner shell, and the lower end of the decomposition cavity is sealed through a bottom plate; a spiral guide plate is arranged in the decomposition cavity and divides the decomposition cavity into spiral blanking channels; the shell is provided with a plurality of coal powder feeding holes communicated with the discharging channel, each coal powder feeding hole is connected with a coal powder conveying mechanism, and the lengths of the discharging channels between any two adjacent coal powder feeding holes are equal.
Further, buggy conveying mechanism includes buggy storage storehouse and hybrid tube, the bottom in buggy storage storehouse is provided with the feed opening, feed opening and hybrid tube intercommunication, the one end and the buggy feed port of hybrid tube or combustion chamber link to each other, and the other end is connected with the fan of breathing in.
Further, the top of buggy storage storehouse is provided with the apron, and the lateral wall is provided with the coal feeding groove, and the notch in coal feeding groove passes through open closed slot door and seals, be provided with sharp actuating mechanism on the apron, sharp actuating mechanism is connected with vertical stirring rod, the lower extreme of stirring rod stretches into the feed opening.
Further, the linear driving mechanism is an air cylinder.
Further, still include a plurality of raw material storage bins, the quantity in raw material storage bin equals with the quantity in buggy storage bin, and the structure in raw material storage bin is the same with the structure in buggy storage bin, and the bottom in every raw material storage bin communicates with a mixing pipe of buggy conveying mechanism.
Further, the mixing pipe comprises a straight line section and a spiral section which are integrally formed, the raw material storage bin and the coal powder storage bin are communicated with the straight line section, and the spiral section is positioned at one end close to the furnace body.
Further, the inside of the inner case is filled with an insulating material.
The utility model has the advantages that: this dore furnace is through setting up more buggy conveying mechanism, and a plurality of buggy conveying mechanism evenly distributed outside the furnace body, can carry the buggy to decomposing the intracavity dispersedly, makes the buggy be full of the decomposition chamber uniformly, guarantees that the heat that each position in decomposition chamber produced is even, and guarantees that buggy and air are abundant, mix uniformly, improves the hot utilization ratio of buggy burning, reduces the energy consumption.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Reference numerals: 1-a combustion chamber; 2-raw material inlet; 3, discharging; 4-outer shell; 5, an inner shell; 6, a guide plate; 7-decomposition chamber; 8, a bottom plate; 9-a pulverized coal storage bin; 10-mixing tube; 11-a feed opening; 12-a suction fan; 13-a coal feeding tank; 14-a cover plate; 15-linear drive mechanism; 16-a kick-off lever; 17-a heat insulating material; and 18, raw material storage bin.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in figure 1, the energy-saving decomposing furnace for cement production of the utility model comprises a furnace body and a combustion chamber 1, wherein the structure of the combustion chamber 1 is consistent with the prior art. The top of the furnace body is provided with a raw material inlet 2 for introducing raw materials to be decomposed, and the bottom is provided with a discharge port 3 for discharging decomposed clinker. The discharge port 3 is generally connected with the rotary kiln, and clinker is directly introduced into the rotary kiln for calcination. The combustion chamber 1 is communicated with the bottom of the furnace body, the combustion chamber 1 is connected with a pulverized coal conveying mechanism, and the pulverized coal conveying mechanism is used for conveying air and pulverized coal to the interior of the furnace body.
The furnace body comprises a cylindrical outer shell 4 and an inner shell 5, a decomposition cavity 7 with an inverted U-shaped vertical section is arranged between the outer shell 4 and the inner shell 5, the lower end of the decomposition cavity 7 is sealed through a bottom plate 8, and the top of the decomposition cavity is sealed through a top plate; a spiral guide plate 6 is arranged in the decomposition cavity, and the spiral guide plate 6 divides the decomposition cavity 7 into spiral blanking channels; the shell body 4 is provided with a plurality of coal powder feeding holes communicated with the discharging channel, each coal powder feeding hole is connected with a coal powder conveying mechanism, and the lengths of the discharging channels between any two adjacent coal powder feeding holes are equal.
Each coal powder conveying mechanism can convey a certain amount of coal powder to the blanking channel, and as the lengths of the blanking channels between any two adjacent coal powder feeding holes are equal, namely the coal powder conveying mechanisms are uniformly distributed, the coal powder can be dispersedly conveyed into the blanking channels, so that the coal powder is uniformly filled in the blanking channels, the phenomenon that the coal powder is excessively gathered at a certain part to cause insufficient combustion is avoided, the combustion efficiency of the coal powder is improved, the temperature of each part of the blanking channels can be consistent, and the production quality is ensured.
The working process of the decomposing furnace is as follows: the pulverized coal conveying mechanism connected with the combustion chamber 1 conveys air and pulverized coal into the combustion chamber 1, the combustion chamber 1 ignites the pulverized coal, the combusted pulverized coal enters the blanking channel, then the pulverized coal conveying mechanisms are sequentially opened from bottom to top to convey the pulverized coal and the air into the blanking channel, and the pulverized coal starts to combust from bottom to top to generate heat. When the temperature in the blanking channel reaches the temperature required by the process, the raw materials are introduced into the blanking channel, and the pulverized coal and the air enter the blanking channel at the same time, so that the air has higher flowing speed, and the pulverized coal and the raw materials are fully mixed under the action of the airflow and are decomposed. The decomposed materials move downwards along with the blanking channel and are finally discharged from the discharge port 3.
Pulverized coal conveying mechanism can adopt the pulverized coal conveying system of current dore furnace, and is preferred, pulverized coal conveying mechanism includes pulverized coal storage 9 and hybrid tube 10, has stored the pulverized coal in pulverized coal storage 9, pulverized coal storage 9's bottom is provided with feed opening 11, feed opening 11 and hybrid tube 10 intercommunication, the one end of hybrid tube 10 links to each other with pulverized coal feed port or combustion chamber 1, and the other end is connected with air suction fan 12. The air suction fan 12 sucks external fresh air, the air flows through the mixing pipe 10 at a high speed, meanwhile, the pulverized coal in the pulverized coal storage bin 9 enters the mixing pipe 10 from the feed opening 11, flows along with the air under the action of wind force, is fully mixed with the air, and finally enters a feeding channel.
When the pulverized coal in the pulverized coal storage bin 9 is more, the pulverized coal located at the bottom of the pulverized coal storage bin 9 is under high pressure, and easy agglomeration affects the blanking, so that the top of the pulverized coal storage bin 9 is provided with the cover plate 14, the cover plate 14 is provided with the linear driving mechanism 15, the linear driving mechanism 15 is connected with the vertical material stirring rod 16, and the lower end of the material stirring rod 16 extends into the blanking port 11. During blanking, the linear driving mechanism 15 drives the material stirring rod 16 to move up and down continuously, and the material stirring rod 16 dredges the blanking opening 11 continuously, so that continuous and automatic blanking of coal powder can be guaranteed. The linear driving mechanism 15 may employ a cylinder, a linear motor, or the like.
In order to add coal powder, a coal adding groove 13 is formed in the side wall of the coal powder storage bin 9, and in order to prevent dust generated during discharging of the coal powder storage bin 9 from floating into the air from the coal adding groove 13, a notch of the coal adding groove 13 is closed through an openable groove door.
In order to further improve the mixing uniformity of the raw material and the pulverized coal and improve the decomposition efficiency of the raw material, the device also comprises a plurality of raw material storage bins 18, the raw material storage bins 18 store the raw material to be decomposed, the number of the raw material storage bins 18 is equal to that of the pulverized coal storage bins 9, the structure of the raw material storage bins 18 is the same as that of the pulverized coal storage bins 9, and the bottom of each raw material storage bin 18 is communicated with a mixing pipe 10 of a pulverized coal conveying mechanism. The during operation lets in mixing tube 10 simultaneously with raw meal and buggy for raw meal and buggy can get into the unloading passageway simultaneously earlier intensive mixing under the effect of air, guarantee the homogeneous mixing of material and buggy, and because let in the unloading passageway with raw meal from a plurality of positions of unloading passageway, make the raw meal dispersion, avoid the raw meal to concentrate and lead to the decomposition rate lower, thereby can improve the decomposition rate of raw meal.
The mixing pipe 10 comprises a straight line section and a spiral section which are integrally formed, the raw material storage bin 18 and the coal powder storage bin 9 are communicated with the straight line section, and the spiral section is positioned at one end close to the furnace body. The coal powder and the raw material enter the straight line segment and then enter the spiral segment, and because the cavity in the spiral segment is spiral, the flowing direction of the air is constantly changed, so that the stirring effect can be achieved, and the raw material and the coal powder can be more uniformly mixed.
The inner shell 5 is filled with heat insulating materials 17, the heat insulating materials 17 can be a combination of ceramic fibers and refractory bricks, the ceramic fibers are laid on the outer surface of the inner shell 5, the refractory bricks are used for supporting the ceramic fibers and the inner shell 5, the stability of the whole decomposing furnace is improved, meanwhile, the heat dissipation speed is reduced, and pulverized coal is saved. In addition, the outer wall of the outer shell 4 is also covered with heat insulation material to reduce energy consumption.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An energy-saving decomposing furnace for cement production comprises a furnace body and a combustion chamber (1), wherein the top of the furnace body is provided with a raw material inlet (2), and the bottom of the furnace body is provided with a discharge hole (3); the combustion chamber (1) is communicated with the bottom of the furnace body, and the combustion chamber (1) is connected with a pulverized coal conveying mechanism; the method is characterized in that: the furnace body comprises a cylindrical outer shell (4) and an inner shell (5), a decomposition cavity (7) is arranged between the outer shell (4) and the inner shell (5), and the lower end of the decomposition cavity (7) is sealed through a bottom plate (8); a spiral guide plate (6) is arranged in the decomposition cavity, and the spiral guide plate (6) divides the decomposition cavity (7) into spiral blanking channels; the shell body (4) is provided with a plurality of coal powder feeding holes communicated with the discharging channel, each coal powder feeding hole is connected with a coal powder conveying mechanism, and the lengths of the discharging channels between any two adjacent coal powder feeding holes are equal.
2. The energy-saving decomposing furnace for cement production according to claim 1, characterized in that: buggy conveying mechanism includes buggy storage storehouse (9) and hybrid tube (10), the bottom of buggy storage storehouse (9) is provided with feed opening (11), feed opening (11) and hybrid tube (10) intercommunication, the one end and buggy feed port or combustion chamber (1) of hybrid tube (10) link to each other, and the other end is connected with air suction fan (12).
3. The energy-saving decomposing furnace for cement production according to claim 2, characterized in that: the pulverized coal storage bin is characterized in that a cover plate (14) is arranged at the top of the pulverized coal storage bin (9), a coal feeding groove (13) is formed in the side wall of the pulverized coal storage bin, a notch of the coal feeding groove (13) is sealed through an openable groove door, a linear driving mechanism (15) is arranged on the cover plate (14), the linear driving mechanism (15) is connected with a vertical material stirring rod (16), and the lower end of the material stirring rod (16) extends into a discharging opening (11).
4. The energy-saving decomposing furnace for cement production according to claim 3, characterized in that: the linear driving mechanism (15) is a cylinder.
5. The energy-saving decomposition furnace for cement production according to claim 2 or 3, wherein: the coal powder mixing device is characterized by further comprising a plurality of raw material storage bins (18), the number of the raw material storage bins (18) is equal to that of the coal powder storage bins (9), the structure of each raw material storage bin (18) is the same as that of each coal powder storage bin (9), and the bottom of each raw material storage bin (18) is communicated with a mixing pipe (10) of a coal powder conveying mechanism.
6. The energy-saving decomposing furnace for cement production according to claim 5, characterized in that: the mixing pipe (10) comprises a straight line section and a spiral section which are integrally formed, the raw material storage bin (18) and the coal powder storage bin (9) are communicated with the straight line section, and the spiral section is positioned at one end close to the furnace body.
7. The energy-saving decomposing furnace for cement production according to claim 1, characterized in that: the inner part of the inner shell (5) is filled with a heat insulating material (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897255.7U CN210855857U (en) | 2019-11-06 | 2019-11-06 | Energy-saving decomposing furnace for cement production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897255.7U CN210855857U (en) | 2019-11-06 | 2019-11-06 | Energy-saving decomposing furnace for cement production |
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| Publication Number | Publication Date |
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| CN210855857U true CN210855857U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921897255.7U Expired - Fee Related CN210855857U (en) | 2019-11-06 | 2019-11-06 | Energy-saving decomposing furnace for cement production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117367122A (en) * | 2023-12-07 | 2024-01-09 | 山西卓越水泥有限公司 | Decomposing furnace for cement manufacturing denitration |
-
2019
- 2019-11-06 CN CN201921897255.7U patent/CN210855857U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117367122A (en) * | 2023-12-07 | 2024-01-09 | 山西卓越水泥有限公司 | Decomposing furnace for cement manufacturing denitration |
| CN117367122B (en) * | 2023-12-07 | 2024-02-09 | 山西卓越水泥有限公司 | Decomposing furnace for cement manufacturing denitration |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200626 Termination date: 20201106 |