CN212451211U - External combustion type light-burned magnesia shaft kiln - Google Patents
External combustion type light-burned magnesia shaft kiln Download PDFInfo
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- CN212451211U CN212451211U CN202020514656.6U CN202020514656U CN212451211U CN 212451211 U CN212451211 U CN 212451211U CN 202020514656 U CN202020514656 U CN 202020514656U CN 212451211 U CN212451211 U CN 212451211U
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Abstract
The patent of the utility model relates to an inorganic chemical industry technical field, concretely relates to external combustion formula light-burned magnesia shaft kiln, including pan feeding mouth, distributing device, the kiln body, draught fan, nozzle, gas pipeline, annular air chamber, disc ejection of compact machine, chute, heat exchanger and air-blower, the kiln body from the top down can be divided into preheating zone, calcining zone and cooling zone. The utility model adopts an external combustion type combustion mode, the combustion efficiency is high, the combustion-supporting air is preheated and then combusted, and the overall energy consumption of the kiln is low; the upper part of the combustion zone, the preheating zone and the lower part of the kiln top are all in negative pressure operation, so that dust pollution is avoided; the annular cooling chamber is externally arranged, cooling air can uniformly heat the material layer, cooling is uniform, and the product quality is good; the shaft kiln adopts a circular design, so that the production capacity is high and the control is easy.
Description
Technical Field
The patent of the utility model relates to an inorganic chemical industry technical field, concretely relates to external combustion formula light-burned magnesia shaft kiln.
Background
The magnesium refractory material industry undergoes profound changes under the influence of factors such as mine control, environmental protection supervision and the like, the production mode of light-burned magnesia is greatly changed, the suspension furnace, the multilayer furnace and the like which have low energy consumption, small pollution, suitability for powder roasting and stable product quality are popularized and used, and the shaft kiln and the rotary kiln can be applied to light burning of specific magnesite raw materials. However, suspension kilns, fluidized beds and rotary kilns are only used by a few enterprises due to high investment cost.
At present, a magnesite light-burned magnesia shaft kiln is widely adopted as a reflection kiln, but the traditional reflection kiln needs workers to operate in an environment with high temperature and large dust, and the product quality is unstable due to long manual blanking time and uneven material sinking; the gas discharged from the traditional reflection kiln has high temperature, large heat loss and complex structure of the traditional reflection kiln, the annual maintenance frequency reaches 5-6 times, and the maintenance cost is high. Therefore, designing a kiln device with low pollution, stable product quality and high productivity becomes one of the problems to be solved urgently in the current refractory material production equipment industry.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides an external combustion type light-burned magnesia shaft kiln with low energy consumption, little pollution, high productivity and good product quality.
In order to achieve the above purpose, the technical scheme of the utility model is that:
an external combustion type light-burned magnesia shaft kiln is characterized by comprising a feeding port, a distributing device, a kiln body, a draught fan, a burner, a gas pipeline, an annular gas chamber, a disc discharging machine, a chute, a heat exchanger and an air blower; the kiln body can be divided into a preheating zone, a calcining zone and a cooling zone from top to bottom; the feed inlet is positioned at the top of the shaft kiln, the distributor is connected below the feed inlet, the bottom end of the distributor is a preheating zone, the lower side of the kiln body side of the preheating zone is communicated with an air inlet of an induced draft fan, and an air outlet of the induced draft fan is communicated with the top of the heat exchanger on the right side; a calcining zone is arranged below the preheating zone, burners are arranged on the outer side of a kiln body of the calcining zone, the middle parts of the side walls of the burners are communicated with a gas pipeline, the tops of the side walls of the burners are communicated with the left upper part of the heat exchanger, and ports at the bottom and the side lower part of the heat exchanger are connected with an air blower; the lower part of the calcining belt is a cooling belt, the outer side of a kiln body of the cooling belt is provided with an annular air chamber, an air outlet of the annular air chamber is communicated with the kiln body, an air inlet of the annular air chamber is communicated with an air blower, the bottom of the kiln body is provided with a disc discharging machine, and a chute is arranged below the disc discharging machine.
The annular air chamber is in an external form.
The burner and the gas pipeline are arranged outside the kiln body to form an external combustion chamber.
Compared with the prior art, the beneficial effects of the utility model are that: 1) the utility model arranges the burner and the gas pipeline outside the kiln body to form an external combustion chamber, the combustion efficiency is high, the combustion-supporting air is preheated to support combustion, and the overall energy consumption of the kiln is low; 2) the upper part of the combustion zone, the preheating zone and the lower part of the kiln top are all in negative pressure operation, so that dust pollution is avoided; 3) the annular cooling chamber is externally arranged, cooling air can uniformly heat the material layer, cooling is uniform, and the product quality is good; 4) the shaft kiln adopts a circular design, so that the production capacity is high and the control is easy.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1-a feeding port, 2-a distributor, 3-a kiln body, 4-an induced draft fan, 5-a burner, 6-a gas pipeline, 7-an annular air chamber, 8-a disc discharging machine, 9-a chute, 10-a heat exchanger and 11-an air blower.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an external combustion type light-burned magnesia shaft kiln designed by the utility model, which comprises a feeding port 1, a distributor 2, a kiln body 3, a draught fan 4, a burner 5, a gas pipeline 6, an annular air chamber 7, a disc discharging machine 8, a chute 9, a heat exchanger 10 and an air blower 11; the kiln body 3 can be divided into a preheating zone, a calcining zone and a cooling zone from top to bottom; the feeding port 1 is positioned at the top of the shaft kiln, the distributing device 2 is connected below the feeding port 1, the bottom end of the distributing device 2 is a preheating zone, the lower side of the kiln body 3 of the preheating zone is communicated with the air inlet of the induced draft fan 4, and the air outlet of the induced draft fan 4 is communicated with the top of the heat exchanger 10 on the right side; a calcining zone is arranged below the preheating zone, a burner 5 is arranged on the outer side of the calcining zone kiln body 3, the middle part of the side wall of the burner 5 is communicated with a gas pipeline 6, the top part of the side wall of the burner 5 is communicated with the upper left of a heat exchanger 10, and a bottom port and a side lower port of the heat exchanger 10 are connected with an air blower 11; the lower part of the calcining belt is a cooling belt, the outer side of the kiln body 3 of the cooling belt is provided with an annular air chamber 7, the air outlet of the annular air chamber 7 is communicated with the kiln body 3, the air inlet of the annular air chamber 7 is communicated with an air blower 11, the bottom of the kiln body 3 is provided with a disc discharging machine 8, and the lower part of the disc discharging machine 8 is provided with a chute 9. The annular air chamber 7 is externally arranged.
The burner 5 and the gas pipeline 6 are arranged outside the kiln body 3 to form an external combustion chamber.
Magnesite ore enters a kiln body 3 from a feeding port 1 through a distributor 2, large particles of 60-80mm are arranged in the middle, and small particles of 20-40mm are arranged around. The ore enters a preheating zone under the action of gravity, and is subjected to heat exchange with hot flue gas and carbon dioxide gas which rise from a calcining zone, and the ore is preheated to 200-300 ℃; hot flue gas and hot flue gas generated by the light burning of magnesite enter a heat exchanger 10 through a draught fan 4 to heat combustion-supporting air; combustion-supporting air is mixed with coal gas in a fuel gas pipeline 6 through a burner 5, the mixed gas is fully combusted in an external combustion chamber, and formed hot flue gas with the temperature of 800-. The blower 11 enters the annular air chamber 7, cooling air enters the hot material layer through the hot material repose angle at the outer edge of the kiln wall channel and the gap between the hot materials, and the materials are cooled to be below 100 ℃. The cooled material is discharged through a disc discharging machine 8 at the bottom of the shaft kiln and a chute 9.
The second-level magnesite ore enters the kiln body 3 from the feeding port 1 through the distributing device 2, large particles of 60-80mm are arranged in the middle, and small particles of 20-40mm are arranged around. The ore enters a preheating zone under the action of gravity, and is subjected to heat exchange with hot flue gas and carbon dioxide gas rising from a calcining zone to be preheated to 200 ℃; hot flue gas and hot flue gas generated by the light burning of magnesite enter a heat exchanger 10 through a draught fan 4 to heat combustion-supporting air; the burner 5 and the gas pipeline 6 are arranged outside the kiln body to form an external combustion chamber, combustion-supporting air is mixed with gas in the gas pipeline 6 through the burner 5, the mixed gas is fully combusted in the external combustion chamber, the overall energy consumption of the kiln is low, and formed hot flue gas with the temperature of 800 ℃ enters a calcining material-carrying layer through a kiln wall channel and moves upwards. The upper part of the combustion zone, the preheating zone and the lower part of the kiln top are all in negative pressure operation, so that dust pollution is avoided. Cooling air enters the annular air chamber 7 through the air blower 11, the cooling air enters the hot material layer through the hot material repose angle at the outer edge of the kiln wall channel and the gap between the hot materials, the materials are cooled to be below 100 ℃, the annular cooling chamber 7 is in an external form, the cooling air can be used for homogenizing the hot material layer, the cooling is uniform, and the product quality is good. The cooled material is discharged through a disc discharging machine 8 at the bottom of the shaft kiln and a chute 9.
The heat consumption of the light-burned magnesia is calculated to be 180kg standard coal/ton product, the production capacity is 200 ton/day, the MgO content in the prepared light-burned magnesia is 93.87 percent, and the chemical activity of the citric acid method is 30 seconds.
Claims (3)
1. An external combustion type light-burned magnesia shaft kiln is characterized by comprising a feeding port (1), a distributor (2), a kiln body (3), an induced draft fan (4), a burner (5), a gas pipeline (6), an annular air chamber (7), a disc discharging machine (8), a chute (9), a heat exchanger (10) and an air blower (11); the kiln body (3) can be divided into a preheating zone, a calcining zone and a cooling zone from top to bottom; the feeding port (1) is positioned at the top of the shaft kiln, a distributing device (2) is connected below the feeding port (1), a preheating zone is arranged at the bottom end of the distributing device (2), the lower side of the kiln body (3) of the preheating zone is communicated with an air inlet of an induced draft fan (4), and an air outlet of the induced draft fan (4) is communicated with the top of a heat exchanger (10) on the right side; a calcining zone is arranged below the preheating zone, a burner (5) is arranged on the outer side of the calcining zone kiln body (3), the middle part of the side wall of the burner (5) is communicated with a gas pipeline (6), the top part of the side wall of the burner (5) is communicated with the upper left of a heat exchanger (10), and a bottom port and a side lower port of the heat exchanger (10) are connected with an air blower (11); the lower part of the calcining belt is a cooling belt, an annular air chamber (7) is arranged on the outer side of a kiln body (3) of the cooling belt, an air outlet of the annular air chamber (7) is communicated with the kiln body (3), an air inlet of the annular air chamber (7) is communicated with an air blower (11), a disc discharging machine (8) is arranged at the bottom of the kiln body (3), and a chute (9) is arranged below the disc discharging machine (8).
2. An external combustion type light-burned magnesia shaft kiln according to claim 1, characterized in that the annular chamber (7) is externally arranged.
3. The external combustion type light-burned magnesia shaft kiln as claimed in claim 1, wherein the burner (5) and the gas pipeline (6) are arranged outside the kiln body (3) to form an external combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020514656.6U CN212451211U (en) | 2020-04-10 | 2020-04-10 | External combustion type light-burned magnesia shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020514656.6U CN212451211U (en) | 2020-04-10 | 2020-04-10 | External combustion type light-burned magnesia shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212451211U true CN212451211U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020514656.6U Active CN212451211U (en) | 2020-04-10 | 2020-04-10 | External combustion type light-burned magnesia shaft kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212451211U (en) |
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2020
- 2020-04-10 CN CN202020514656.6U patent/CN212451211U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220214 Address after: 114001, No. 185, Qianshan Road, hi tech Zone, Liaoning, Anshan Patentee after: Liaoning University of science and Technology Science Park Development Co.,Ltd. Address before: 114225 No. 185 Qianshan Middle Road, Anshan City, Liaoning Province Patentee before: University of Science and Technology Liaoning |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220330 Address after: 114051 No.189 Qianshan Middle Road, Lishan District, Anshan City, Liaoning Province Patentee after: University of Science and Technology Liaoning Address before: 114001, No. 185, Qianshan Road, hi tech Zone, Liaoning, Anshan Patentee before: Liaoning University of science and Technology Science Park Development Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220412 Address after: 114001, No. 185, Qianshan Road, hi tech Zone, Liaoning, Anshan Patentee after: Liaoning University of science and Technology Science Park Development Co.,Ltd. Patentee after: Zhang Ling Address before: 114051 No.189 Qianshan Middle Road, Lishan District, Anshan City, Liaoning Province Patentee before: University of Science and Technology Liaoning |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220518 Address after: 114201 No. 2, Longjiang Road, Haicheng Economic Development Zone, Anshan City, Liaoning Province Patentee after: Liaoning Dongke Magnesium Technology Co.,Ltd. Address before: 114001, No. 185, Qianshan Road, hi tech Zone, Liaoning, Anshan Patentee before: Liaoning University of science and Technology Science Park Development Co.,Ltd. Patentee before: Zhang Ling |