CN212741161U - Shaft kiln device with parallel-flow calcination and countercurrent heat storage - Google Patents
Shaft kiln device with parallel-flow calcination and countercurrent heat storage Download PDFInfo
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- CN212741161U CN212741161U CN202022167226.4U CN202022167226U CN212741161U CN 212741161 U CN212741161 U CN 212741161U CN 202022167226 U CN202022167226 U CN 202022167226U CN 212741161 U CN212741161 U CN 212741161U
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Abstract
The utility model relates to the technical field of lime preparation, in particular to a shaft kiln device with parallel flow calcination and countercurrent heat storage; comprises a first shaft kiln and a second shaft kiln arranged on one side of the first shaft kiln; the first shaft kiln comprises a kiln body, a circulating mechanism, a combustion mechanism, a cooling mechanism, a discharging mechanism and a ventilation system; the kiln body is divided into a preheating zone, a calcining zone and a cooling zone from top to bottom; the circulation mechanism is arranged on the lower portion of the calcining zone, the combustion mechanism is arranged on the upper portion of the calcining zone, the cooling mechanism is arranged on the lower portion of the cooling zone and located between the first vertical kiln and the second vertical kiln, the discharging mechanism is arranged at the bottom of the kiln body, and the ventilation system is arranged at the top of the kiln body.
Description
Technical Field
The utility model relates to a lime preparation technical field especially relates to a shaft kiln device that parallel flow calcines, heat accumulation against current.
Background
Along with the annual increase of domestic lime productivity, environmental protection, energy conservation and product quality are gradually emphasized in the lime industry; most of the existing lime energy production comes from common lime shaft kilns, namely common mechanical shaft kilns and co-firing kilns, the energy conservation and environmental protection of the lime shaft kilns cannot meet the standards, the product quality is not high, but if the common shaft kilns are dismantled and replaced into novel lime kilns, a large amount of resources can be wasted or a large amount of funds are consumed, even some lime enterprises can possibly receive serious creation, and the lime shaft kilns are very unfavorable for the development of the lime industry.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a shaft kiln device with parallel flow calcination and countercurrent heat storage, aiming at the technical defects, the first shaft kiln and the second shaft kiln are combined and fixed, and a circulation mechanism, a combustion mechanism, a ventilation mechanism and the like are added on the first shaft kiln and the second shaft kiln, so that the prior production process is changed, the energy saving and the environmental protection are realized while the productivity and the product quality are ensured; and the original common lime shaft kiln does not need to be dismantled, so that the capital consumption is greatly reduced.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: comprises a first shaft kiln and a second shaft kiln arranged on one side of the first shaft kiln; the first shaft kiln comprises a kiln body, a circulating mechanism, a combustion mechanism, a cooling mechanism, a discharging mechanism and a ventilation system; the kiln body is divided into a preheating zone, a calcining zone and a cooling zone from top to bottom; the circulation mechanism is arranged on the lower portion of the calcining zone, the combustion mechanism is arranged on the upper portion of the calcining zone, the cooling mechanism is arranged on the lower portion of the cooling zone and located between the first vertical kiln and the second vertical kiln, the discharging mechanism is arranged at the bottom of the kiln body, and the ventilation system is arranged at the top of the kiln body.
Further, the circulating mechanism comprises a connecting channel, an annular channel, an air cannon and a poking hole; the annular channel is arranged outside the kiln body, the connecting channel is arranged on the annular channel and located between the first shaft kiln and the second shaft kiln, the air cannon is arranged on the outer side of the annular channel, and the fire poking hole is arranged on the annular channel and penetrates through the top surface of the annular channel.
Furthermore, the combustion mechanism comprises a gas ring pipe, a spray gun and a spray gun cooling air ring pipe; the gas ring pipe surrounds the kiln body and is positioned at the upper part of the calcining zone, the spray gun cooling air ring pipe surrounds the kiln body and is positioned above the gas ring pipe, and the spray gun is arranged between the gas ring pipe and the spray gun cooling air ring pipe and is connected with the gas ring pipe and the spray gun cooling air ring pipe.
Further, the cooling mechanism comprises a lime cooling air main pipe, a lime cooling air release valve and a lime cooling air branch pipe; the lime cooling air branch pipe is arranged at the lower part of the cooling zone and connected with a lime cooling air release valve, and the lime cooling air release valve is connected with a lime cooling air main pipe.
Further, the discharging mechanism comprises an ash storage hopper and a discharging machine; the ash storage hopper is arranged at the bottom of the cooling belt, and the unloading machine is fixed at the bottom of the ash storage hopper.
Further, the kiln body lower part outside is provided with first reinforcement, be provided with the second reinforcement between first shaft kiln and the second shaft kiln, the kiln body is close to the intermediate position and is provided with the third reinforcement, be provided with the fourth reinforcement between first shaft kiln and the second shaft kiln, the fourth reinforcement is located the kiln body and is close to the intermediate position.
Further, the ventilation system comprises a combustion-supporting air pipeline, a combustion-supporting air release valve, a reversing gate plate, a shared pipeline and an exhaust gas pipeline; the combustion-supporting air pipeline is connected with a combustion-supporting air release valve, the combustion-supporting air release valve is connected with a reversing flashboard, the reversing flashboard is connected with a shared pipeline and a waste gas pipeline, the shared pipeline is respectively connected with a first shaft kiln and a second shaft kiln, and the waste gas pipeline is connected with an induced draft fan.
Further, a distributing device is arranged in the kiln body feed inlet, a material level meter is arranged in the kiln body feed inlet, and a sealing flashboard is arranged at the top of the kiln body.
Furthermore, the second shaft kiln and the first shaft kiln are symmetrically arranged.
Compared with the prior art, the utility model has the advantages of it is following:
1. the circulating mechanism can lead the high-temperature airflow in the first shaft kiln to the second shaft kiln, not only can heat the incompletely decomposed limestone raw material in the second shaft kiln, but also can preheat the newly-fed limestone raw material, thereby reducing the time and the fuel consumed during calcination, effectively saving the fuel consumption and greatly improving the production efficiency;
2. through the arrangement of the spray gun extending into the calcining zone and the combustion-supporting air pipeline, high-temperature airflow during calcining is enabled to be from top to bottom and to be the same as the movement direction of materials, parallel-flow calcining is formed, the mechanism is consistent with the thermal decomposition mechanism of limestone, and the quality of the produced lime can be effectively improved;
3. the device is modified by using the original shaft kiln, does not need excessive capital investment, avoids the situation of dismantling the original shaft kiln, not only retains the original equipment, but also improves the product quality and protects the environment;
4. the combustion-supporting gas is controlled to flow into the first shaft kiln or the second shaft kiln through the reversing flashboard on the ventilation system, so that the working system between the first shaft kiln and the second shaft kiln is more convenient to change, and the production efficiency is effectively improved.
Drawings
FIG. 1 is a front cross-sectional view of a cocurrent calcination, countercurrent regenerative shaft kiln apparatus.
In the figure: 1. a first shaft kiln; 2. a second shaft kiln; 3. a kiln body; 301. preheating a belt; 302. burning the strip; 303. A cooling zone; 304. a first stiffener; 305. a second stiffener; 306. a third stiffener; 307. a fourth stiffener; 308. a distributing device; 309. a level gauge; 310. sealing the gate plate; 401. a connecting channel; 402. An annular channel; 403. an air cannon; 404. a fire poking hole; 501. a gas ring pipe; 502. a spray gun; 503. a spray gun cooling air ring pipe; 601. a lime cooling air main pipe; 602. a lime cooling air release valve; 603. lime cooling air branch pipes; 701. a dust storage hopper; 702. a discharging machine; 801. a combustion air duct; 802. a combustion-supporting air release valve; 803. a reversing gate plate; 804. a common conduit; 805. an exhaust gas conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, comprises a first shaft kiln 1 and a second shaft kiln 2 arranged at one side of the first shaft kiln 1; the first shaft kiln 1 comprises a kiln body 3, a circulation mechanism, a combustion mechanism, a cooling mechanism, a discharging mechanism and a ventilation system; the kiln body 3 is divided into a preheating zone 301, a calcining zone 302 and a cooling zone 303 from top to bottom; the circulation mechanism is arranged on the lower portion of the calcining zone 102, the combustion mechanism is arranged on the upper portion of the calcining zone 102, the cooling mechanism is arranged on the lower portion of the cooling zone 103 and located between the first shaft kiln 1 and the second shaft kiln 2, the discharge mechanism is arranged at the bottom of the kiln body 3, and the ventilation system is arranged at the top of the kiln body 3.
The circulating mechanism comprises a connecting channel 401, an annular channel 402, an air cannon 403 and a firing hole 404; the annular channel 402 is arranged outside the kiln body 3, the connecting channel 401 is arranged on the annular channel 402 and located between the first shaft kiln 1 and the second shaft kiln 2, the air cannon 403 is arranged on the outer surface of the annular channel 402, and the fire poking hole 404 is arranged on the annular channel 402 and penetrates through the top surface of the annular channel 402.
The combustion mechanism comprises a gas ring pipe 501, a spray gun 502 and a spray gun cooling air ring pipe 503; the gas ring pipe 501 surrounds the kiln body 3 and is positioned at the upper part of the calcining zone 102, the spray gun cooling air ring pipe 503 surrounds the kiln body 3 and is positioned above the gas ring pipe 501, and the spray gun 502 is arranged between the gas ring pipe 501 and the spray gun cooling air ring pipe 503 and is connected with the gas ring pipe 501 and the spray gun cooling air ring pipe 503.
The cooling mechanism comprises a lime cooling air main pipe 601, a lime cooling air release valve 602 and a lime cooling air branch pipe 603; the lime cooling air branch pipe 603 is arranged at the lower part of the cooling belt 303, the lime cooling air branch pipe 603 is connected with a lime cooling air release valve 602, and the lime cooling air release valve 602 is connected with a lime cooling air main pipe 601.
The discharging mechanism comprises an ash storage hopper 701 and a discharging machine 702; the ash storage hopper 701 is arranged at the bottom of the cooling belt 303, and the unloader 702 is fixed at the bottom of the ash storage hopper 701.
The outer side of the lower part of the kiln body 3 is provided with a first reinforcing member 304, a second reinforcing member 305 is arranged between the first shaft kiln 1 and the second shaft kiln 2, the kiln body 3 is provided with a third reinforcing member 306 near the middle position, a fourth reinforcing member 307 is arranged between the first shaft kiln 1 and the second shaft kiln 2, and the fourth reinforcing member 307 is positioned at the middle position near the kiln body 3.
The aeration system comprises a combustion air pipeline 801, a combustion air release valve 802, a reversing gate plate 803, a common pipeline 804 and an exhaust gas pipeline 805; combustion-supporting air pipeline 801 connects combustion-supporting air relief valve 802, combustion-supporting air relief valve 802 connects switching-over flashboard 803, sharing pipeline 804 and exhaust gas piping 805 are connected to switching-over flashboard 803, first shaft kiln 1 and second shaft kiln 2 are connected respectively to sharing pipeline 804, the draught fan is connected to exhaust gas piping 805.
A distributor 308 is arranged in the feed inlet of the kiln body 3, a charge level indicator 309 is arranged in the feed inlet of the kiln body 3, and a sealing flashboard 310 is arranged at the top of the kiln body 3.
The second shaft kiln 2 and the first shaft kiln 1 are symmetrically arranged.
The working principle is that the first shaft kiln and the second shaft kiln are divided into a calcining kiln chamber and a heat storage kiln chamber when working, namely when the first shaft kiln is the calcining kiln chamber, the second shaft kiln is the heat storage kiln chamber, the working types can be mutually converted, conversion is carried out every 12 minutes, and the calcining kiln chamber and the heat storage kiln chamber simultaneously discharge ash; when the first shaft kiln is a calcining kiln chamber and the second shaft kiln is a heat storage kiln chamber, materials are conveyed to the tops of the first shaft kiln and the second shaft kiln through a lifter and a hopper, the materials are distributed in the shaft kilns through a distributor according to requirements, and the amount of the materials in the kilns is detected through a level meter so as to control the amount of the materials to be put; after the material is put in, sealing the kiln top by using a sealing flashboard to form a sealing state in the kiln body;
in the first shaft kiln, a spray gun is used for ignition, fuel gas is introduced into a calcining zone in the kiln body by using a fuel gas ring pipe, the spray gun extends into the kiln body from the outside, is bent downwards, and is matched with combustion-supporting air introduced by a combustion-supporting air pipeline from top to bottom, so that high-temperature airflow of the calcining zone flows from top to bottom, the high-temperature airflow is the same as the movement direction of materials, limestone is decomposed at the same time to form parallel-flow calcining, the mechanism is consistent with the thermal decomposition mechanism of the limestone, and high-quality lime can be produced; the high-temperature airflow is gathered in the annular channel of the first shaft kiln and converged into the connecting channel, and then is uniformly released into the kiln body of the second shaft kiln through the annular channel of the second shaft kiln; the waste gas pipeline at the top of the kiln body is connected with an external induced draft fan, so that a negative pressure state is generated in the second shaft kiln, and high-temperature airflow flows from bottom to top; the combustion-supporting air pipeline is respectively connected with the reversing flashboards on the first shaft kiln and the second shaft kiln, so that the reversing flashboard on the first shaft kiln controls the combustion-supporting air pipeline to be communicated with the shared pipeline but not communicated with the waste gas pipeline at the moment, and the reversing flashboard on the second shaft kiln controls the shared pipeline to be communicated with the waste gas pipeline but not communicated with the combustion-supporting air pipeline;
and an air cannon is arranged outside the connecting channel and is used for instantly blowing accumulated dust in the connecting channel through high-pressure air so as to ensure the smoothness of the high-temperature flue gas channel. And a fire poking hole is arranged at the connecting channel, and attachments adhered to the inner wall of the connecting channel are removed by using a mechanical tool.
The high-temperature gas flows from bottom to top in the second shaft kiln, and transfers heat to the undecomposed limestone in the second shaft kiln and the limestone raw material newly fed into the kiln, so that fuel consumed by preheating in the second shaft kiln can be reduced, and the undecomposed limestone in the calcining section can be heated and decomposed, thereby saving energy and accelerating the production progress; the limestone decomposed in the first shaft kiln enters a cooling section, a lime cooling air release valve is opened, and cooling air in a lime cooling air main pipe enters a lime cooling air branch pipe so as to enter the internal cooling section of the kiln body, cool the generated lime, finally enter a lime storage hopper, and discharge the lime through a discharging machine.
After a period is finished, the first shaft kiln and the second shaft kiln are switched to work modes, the first shaft kiln is changed from a calcining kiln chamber to a heat storage kiln chamber, the second shaft kiln is changed from the heat storage kiln chamber to a calcining kiln chamber, namely, a reversing flashboard on the second shaft kiln is controlled to control combustion-supporting air to be introduced into the second shaft kiln, and meanwhile, the first shaft kiln is communicated with a waste gas pipeline and is closed with a combustion-supporting air pipeline; and after the working modes of the first shaft kiln and the second shaft kiln are switched, connecting the spray gun cooling air ring pipe with the spray gun on the first shaft kiln, and cooling the spray gun, namely after the working modes of the first shaft kiln and the second shaft kiln are switched, cooling the spray gun in the converted heat storage kiln chamber.
The utility model discloses a control mode comes automatic control through the controller, and the control circuit of controller can realize through the simple programming of technical staff in this field, belongs to the common general knowledge in this field, and the utility model discloses mainly be used for protecting the machinery setting, so the utility model discloses no longer explain control mode and circuit connection in detail.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A shaft kiln device with cocurrent calcination and countercurrent heat storage is characterized in that: comprises a first shaft kiln (1) and a second shaft kiln (2) arranged at one side of the first shaft kiln (1); the first shaft kiln (1) comprises a kiln body (3), a circulating mechanism, a combustion mechanism, a cooling mechanism, a discharging mechanism and a ventilation system; the kiln body (3) is divided into a preheating zone (301), a calcining zone (302) and a cooling zone (303) from top to bottom; the circulation mechanism is arranged on the lower portion of the calcining zone (302), the combustion mechanism is arranged on the upper portion of the calcining zone (302), the cooling mechanism is arranged on the lower portion of the cooling zone (303) and located between the first shaft kiln (1) and the second shaft kiln (2), the discharging mechanism is arranged at the bottom of the kiln body (3), and the ventilation system is arranged at the top of the kiln body (3).
2. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the circulating mechanism comprises a connecting channel (401), an annular channel (402), an air cannon (403) and a poking hole (404); the annular channel (402) is arranged outside the kiln body (3), the connecting channel (401) is arranged on the annular channel (402) and located between the first shaft kiln (1) and the second shaft kiln (2), the air cannon (403) is arranged on the outer face of the annular channel (402), and the fire poking hole (404) is arranged on the annular channel (402) and penetrates through the top face of the annular channel (402).
3. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the combustion mechanism comprises a gas ring pipe (501), a spray gun (502) and a spray gun cooling air ring pipe (503); the gas ring pipe (501) surrounds the kiln body (3) and is positioned at the upper part of the calcining zone (302), the spray gun cooling air ring pipe (503) surrounds the kiln body (3) and is positioned above the gas ring pipe (501), and the spray gun (502) is arranged between the gas ring pipe (501) and the spray gun cooling air ring pipe (503) and is connected with the gas ring pipe (501) and the spray gun cooling air ring pipe (503).
4. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the cooling mechanism comprises a lime cooling air main pipe (601), a lime cooling air release valve (602) and a lime cooling air branch pipe (603); lime cooling air branch pipe (603) are arranged at the lower part of cooling zone (303), lime cooling air branch pipe (603) is connected with lime cooling air release valve (602), and lime cooling air release valve (602) is connected with lime cooling air main pipe (601).
5. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the discharging mechanism comprises an ash storage hopper (701) and a discharging machine (702); the ash storage hopper (701) is arranged at the bottom of the cooling belt (303), and the unloading machine (702) is fixed at the bottom of the ash storage hopper (701).
6. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the kiln body (3) lower part outside is provided with first reinforcement (304), be provided with second reinforcement (305) between first shaft kiln (1) and second shaft kiln (2), the kiln body (3) are close to intermediate position and are provided with third reinforcement (306), be provided with fourth reinforcement (307) between first shaft kiln (1) and second shaft kiln (2), fourth reinforcement (307) are located the kiln body (3) and are close to intermediate position.
7. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the ventilation system comprises a combustion air pipeline (801), a combustion air release valve (802), a reversing gate plate (803), a common pipeline (804) and an exhaust gas pipeline (805); combustion-supporting wind relief valve (802) is connected in combustion-supporting wind pipeline (801), switching-over flashboard (803) is connected in combustion-supporting wind relief valve (802), sharing pipeline (804) and exhaust gas conduit (805) are connected in switching-over flashboard (803), first shaft kiln and second shaft kiln are connected respectively in sharing pipeline (804), the draught fan is connected in exhaust gas conduit (805).
8. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 1, characterized in that: the kiln is characterized in that a material distributor (308) is arranged in the feed inlet of the kiln body (3), a material level meter (309) is arranged in the feed inlet of the kiln body (3), and a sealing gate plate (310) is arranged at the top of the kiln body (3).
9. The cocurrent calcination, countercurrent regenerative shaft kiln installation according to claim 8, characterized in that: the second shaft kiln (2) and the first shaft kiln (1) are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022167226.4U CN212741161U (en) | 2020-09-28 | 2020-09-28 | Shaft kiln device with parallel-flow calcination and countercurrent heat storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022167226.4U CN212741161U (en) | 2020-09-28 | 2020-09-28 | Shaft kiln device with parallel-flow calcination and countercurrent heat storage |
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| CN212741161U true CN212741161U (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022167226.4U Active CN212741161U (en) | 2020-09-28 | 2020-09-28 | Shaft kiln device with parallel-flow calcination and countercurrent heat storage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112079582A (en) * | 2020-09-28 | 2020-12-15 | 石家庄圣宏达热能工程技术股份有限公司 | Shaft kiln device with parallel-flow calcination and countercurrent heat storage and transformation method thereof |
-
2020
- 2020-09-28 CN CN202022167226.4U patent/CN212741161U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112079582A (en) * | 2020-09-28 | 2020-12-15 | 石家庄圣宏达热能工程技术股份有限公司 | Shaft kiln device with parallel-flow calcination and countercurrent heat storage and transformation method thereof |
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