CN215798531U - Coal series kaolin calcining device - Google Patents
Coal series kaolin calcining device Download PDFInfo
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- CN215798531U CN215798531U CN202122415427.6U CN202122415427U CN215798531U CN 215798531 U CN215798531 U CN 215798531U CN 202122415427 U CN202122415427 U CN 202122415427U CN 215798531 U CN215798531 U CN 215798531U
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Abstract
The utility model discloses a coal series kaolin calcining device which comprises C0Separator, C0The outside of the separator is connected with a high-temperature fan C0A C1 separator is arranged on one side of the separator, a C2 separator is arranged on one side of the C1 separator, a C3 separator is arranged on one side of the C2 separator, a C4 separator is arranged on one side of the C3 separator, a calcining furnace is arranged on one side of the C4 separator, a combustion nozzle is arranged at the bottom of the calcining furnace, a primary air fan is arranged on one side of the calcining furnace, and a first C4 separator is arranged on one side of the first calcining furnaceThe side of the furnace is provided with a heat preservation cylinder, the side of the calcining furnace is provided with a B1 separator, the side of the B1 separator is provided with a B2 separator, and an L1 cooling cylinder is arranged below the B2 separator. The coal-series kaolin calcination process and the device thereof provide a dynamic calcination process of suspension preheating, suspension calcination, a heat preservation cylinder and suspension cooling, and the kaolin produced by the calcination process has high activity, good whiteness, high crystal conversion rate, high suspension calcination speed and low calcination heat consumption, and is suitable for large-scale production of coal-series kaolin.
Description
Technical Field
The utility model relates to the technical field of coal series calcination, in particular to a coal series kaolin calcination process and a device.
Background
The hard kaolin of the coal series in China has abundant resources, the reserve of the hard kaolin is about 16.7 hundred million tons (the future reserve reaches more than 100 hundred million tons) according to incomplete statistics, and the activation and calcination of the kaolin can achieve the following three purposes: firstly, remove carbon and other organic matters in the coal series kaolin, make the components more pure, simultaneously improve the whiteness of the product, and the product can be used for various fillers, coatings and the like. And secondly, the activity of the product is increased, and the product is used for producing aluminum salt chemical products and chemical products such as alumina, aluminum hydroxide, water glass, white carbon black, 4A molecular sieve and the like. And thirdly, carrying out crystal form conversion to produce mullite products used for ceramics, refractory materials, special fillers and the like. At present, static calcination, semi-dynamic calcination or intermittent dynamic calcination is generally adopted when coal-based kaolin is calcined, and the adopted kiln equipment mainly comprises a down-draft kiln, a shuttle kiln, a tunnel kiln or a heat-insulating cylinder, a multi-stage moving bed, an intermittent spouting fluidized bed and the like. The kilns have some defects which are difficult to overcome when the coal series kaolin is calcined, and the technical requirements of continuous large-scale calcination production of the coal series kaolin cannot be met. The production and technical development of the industry has been a difficult task since the last decade.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a coal-series kaolin calcining process and a coal-series kaolin calcining device aiming at the defects in the prior art so as to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: comprising C0Separator (1), said C0The separator (1) is externally connected with a high-temperature fan (2), and C0A C1 separator (3) is arranged on one side of the separator (1), a C2 separator (4) is arranged on one side of the C1 separator (3), a C3 separator (5) is arranged on one side of the C2 separator (4), a C4 separator (6) is arranged on one side of the C3 separator (5), a calcining furnace (9) is arranged on one side of the C4 separator (6), a combustion nozzle (8) is arranged at the bottom of the calcining furnace (9), a primary fan (7) is arranged on one side of the calcining furnace (9), a heat-insulating cylinder (10) is arranged on one side of the C4 separator (6), a B1 separator (11) is arranged on one side of the calcining furnace (9), a B2 separator (12) is arranged on one side of the B1 separator (11), and a B2 separator (1)2) One side is provided with L1 cooling cylinder (13), L1 cooling cylinder (13) one side is provided with first air-blower (14), B2 separator (12) one side is provided with L2 cooling cylinder (16), L2 cooling cylinder (16) external connection has second air-blower (15), L2 cooling cylinder (16) one side is provided with B3 separator (17), B3 separator (17) one side is provided with dust collector (18), dust collector (18) one side is provided with exhaust fan (19), L1 cooling cylinder (13), L2 cooling cylinder (16), dust collector (18) outside are provided with zip fastener machine (20).
As a preferred embodiment of the present invention, said C0Air outlet pipes are respectively arranged on the separator (1), the C1 separator (3), the C2 separator (4) and the C3 separator (5).
In a preferred embodiment of the present invention, the first blower (14) is fixedly attached to the bottom of the L1 cooling cylinder (13), and the first blower (14) is connected to the L1 cooling cylinder (13) in a penetrating manner.
In a preferred embodiment of the present invention, the second blower (15) is fixedly attached to the bottom of the L2 cooling cylinder (16), and the second blower (15) is connected to the L2 cooling cylinder (16) in a penetrating manner.
As a preferable technical scheme of the utility model, an emergency discharge port is arranged below the L1 cooling cylinder (13).
As a preferred technical scheme of the utility model, an emergency discharge port is arranged below the L2 cooling cylinder (16).
Compared with the prior art, the utility model provides a coal-series kaolin calcining process and device, which have the following beneficial effects:
1. the process and the device for calcining the coal-series kaolin adopt suspension calcination, have high calcining speed and low calcining heat consumption, are suitable for large-scale production of the coal-series kaolin, and the kaolin produced by the process has high activity, good whiteness and high crystal form conversion rate;
2. compared with the same type of scale, the coal-series kaolin calcining process and the device have the advantages that the investment of the suspension calcining process is more saved, and the investment cost performance is high;
3. according to the coal-series kaolin calcining process and the device, the materials and the flue gas adopt a step-by-step heat exchange mode, so that the heat exchange efficiency between solid and gas is improved, the temperature of the flue gas can be reduced to be lower than 320 ℃, and the heat consumption of a system is greatly reduced;
4. according to the coal-series kaolin calcining process and the device, the reduction reaction liquid phase amount between coke and phosphogypsum in the calcining kiln is small, in order to ensure that the raise dust in the kiln is reduced and the combustion in the kiln is ensured, the rotation speed of the kiln is generally controlled at 1r/min, and the highest rotation speed is not more than 2 r/min;
5. according to the coal-series kaolin calcining process and device, the finished product of the system is powder, the suspension state cooling heat exchange is adopted, the heat exchange speed and the cooling efficiency are greatly improved, the investment is reduced, and the heat consumption of the system is reduced
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. c0A separator; 2. a high temperature fan; 3. a C1 separator; 4. a C2 separator; 5. a C3 separator; 6. a C4 separator; 7. a primary air fan; 8. a combustion nozzle; 9. a calciner; 10. A heat-preserving cylinder; 11. a B1 separator; 12. a B2 separator; 13. l1 cooling drum; 14. a first blower; 15. a second blower; 16. l2 cooling drum; 17. a B3 separator; 18. a dust collector; 19. an exhaust fan; 20. provided is a zipper machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the present embodiment: comprising C0Separator (1), said C0The separator (1) is externally connected with a high-temperature fan (2), and C0Separator (1) one side is provided with C1 separator (3), C1 separator (3) one side is provided with C2 separator (4), C2 separator (4) one side is provided with C3 separator (5), C3 separator (5) one side is provided with C4 separator(6) A calcining furnace (9) is arranged on one side of the C4 separator (6), a combustion nozzle (8) is arranged at the bottom of the calcining furnace (9), a primary air fan (7) is arranged on one side of the calcining furnace (9), a heat-insulating cylinder (10) is arranged on one side of the C4 separator (6), a B1 separator (11) is arranged on one side of the calcining furnace (9), a B2 separator (12) is arranged on one side of the B1 separator (11), an L1 cooling cylinder (13) is arranged on one side of the B2 separator (12), a first air blower (14) is arranged on one side of the L1 cooling cylinder (13), an L2 cooling cylinder (16) is arranged on one side of the B2 separator (12), a second air blower (15) is connected to the outside of the L2 cooling cylinder (16), a B3 separator (17) is arranged on one side of the L2 cooling cylinder (16), and a dust collector (18) is arranged on one side of the B3 separator (17), an exhaust fan (19) is arranged on one side of the dust collector (18), and a zipper machine (20) is arranged outside the L1 cooling cylinder (13), the L2 cooling cylinder (16) and the dust collector (18).
In this embodiment, a coal-based kaolin calcining device comprises a calcining process including the steps of feeding crushed and ground kaolin into an air outlet pipe of a C1 cyclone, exchanging heat between the material and flue gas in the air outlet pipe of C1, and feeding the material into C along with the flue gas0The separator 1 is used for separating the material and the gas, the temperature of the flue gas is changed from 550 ℃ to 320 ℃ after heat exchange, the temperature of the material is heated from 20 ℃ to 300 ℃, the separated flue gas enters the high-temperature fan 2, and the material enters the C2 air outlet pipe; the material and the flue gas exchange heat in the C2 air outlet pipe, the material enters the C1 separator 3 along with the flue gas to separate the material and the gas, the temperature of the flue gas is changed from 700 ℃ to 550 ℃ after heat exchange, the temperature of the material is heated from 300 ℃ to 500 ℃, and the flue gas enters the C after separation0In the separator 1, the material enters a C3 air outlet pipe; the material and the flue gas exchange heat in the C3 air outlet pipe, the material enters the C2 separator 4 along with the flue gas to separate the material and the gas, the temperature of the flue gas is changed from 850 ℃ to 700 ℃ after heat exchange, the temperature of the material is heated from 500 ℃ to 650 ℃, the flue gas after separation enters the C1 separator 3, and the material enters the C4 air outlet pipe; the material and the flue gas exchange heat in the C4 air outlet pipe, the material enters the C3 separator 5 along with the flue gas to carry out material-gas separation, the temperature of the flue gas is changed from 950 ℃ to 850 ℃ after heat exchange, the temperature of the material is heated from 650 ℃ to 800 ℃, and the flue gas after separation enters the C2 separator 4; the materials enter a suspension calciner 9 for decarburization reaction, and the cone part of the calciner 9 is blown with natural gasCalcining with gas, calcining with a suspension calciner 9 for about 5-6 s, wherein the calcining temperature in the calciner 9 is about 1000 ℃, the calcined material enters a C4 separator 6 along with flue gas for material-gas separation, the flue gas temperature after material-gas separation is 950 ℃, the material temperature is 1000 ℃, the material enters a heat-insulating cylinder 10 for heat insulation, the material stays in the heat-insulating cylinder 10 for about 30 minutes, the whitening is carried out in the heat-insulating cylinder 10, the whiteness of kaolin out of the heat-insulating cylinder 10 reaches 90%, and the material temperature out of the heat-insulating cylinder 10 is 900 ℃; kaolin which is whitened in the heat preservation cylinder 10 enters an air outlet pipe of a B2 separator 12, enters a B1 separator 11 along with hot air after heat exchange for material and gas separation, the temperature of the gas is increased from 450 ℃ to 600 ℃, the temperature of the material is decreased from 900 ℃ to 650 ℃, hot air after separation is used as combustion-supporting air to enter a calcining furnace 9, the material enters an L1 cooling cylinder 13 for cooling, cold air is blown into the bottom of the L1 cooling cylinder 13 through a first air blower 14, an emergency discharge port is arranged below the L1 cooling cylinder 13, and the material can be discharged outside through the emergency discharge port when an accident occurs; under normal conditions, air blows materials out of an L1 cooling cylinder 13 and sends the materials to a B2 separator 12 for material-gas separation, the temperature of heat exchange gas is increased from 20 ℃ to 450 ℃, the temperature of the materials is decreased from 650 ℃ to 150 ℃, hot air after separation enters a B1 separator 11, the materials enter an L2 cooling cylinder 16 for continuous cooling, cold air is blown into the bottom of the L2 cooling cylinder 16 through a second air blower 15, an emergency discharge port is arranged below the L2 cooling cylinder 16, and the materials can be discharged outside through the emergency discharge port when an accident happens; under normal conditions, air blows materials out of an L2 cooling cylinder 16 and sends the materials to a B3 separator 17 for material and gas separation, the temperature of the heat exchange materials is reduced from 150 ℃ to 50 ℃, the temperature of the gas is increased from 20 ℃ to 50 ℃, the separated hot air enters a dust collector 18 for purification and then is discharged by an exhaust fan 19, and the materials are sent to a finished product zipper machine 20 and sent to a finished product warehouse.
The working principle and the using process of the utility model are as follows: when the coal-series kaolin calcining process and the device are used, the process adopts suspension calcining, the calcining speed is high, the calcining heat consumption is low, the process is suitable for large-scale production of the coal-series kaolin, and the kaolin produced by the process has high activity, good whiteness and high crystal form conversion rate; compared with the same type of scale, the suspension calcination process has more investment and high investment cost performance; materials and flue gas adopt a step-by-step heat exchange mode, and the heat exchange efficiency between solid gas and gas is improved. The temperature of the flue gas can be reduced to below 320 ℃, so that the heat consumption of the system is greatly reduced; the heat preservation is carried out by adopting a heat preservation cylinder with adjustable rotating speed, so that the enough whitening time of the calcined kaolin is ensured, and the whiteness of the product reaches 90%; the finished product of the system is powder, and the suspension state cooling heat exchange is adopted, so that the heat exchange speed and the cooling efficiency are greatly improved, the investment is reduced, and the heat consumption of the system is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. 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 (6)
1. A coal-series kaolin calcining device is characterized in that: comprising C0Separator (1), said C0The separator (1) is externally connected with a high-temperature fan (2), and C0A C1 separator (3) is arranged on one side of the separator (1), a C2 separator (4) is arranged on one side of the C1 separator (3), a C3 separator (5) is arranged on one side of the C2 separator (4), a C4 separator (6) is arranged on one side of the C3 separator (5), a calcining furnace (9) is arranged on one side of the C4 separator (6), a combustion nozzle (8) is arranged at the bottom of the calcining furnace (9), a primary fan (7) is arranged on one side of the calcining furnace (9), a heat-insulating cylinder (10) is arranged on one side of the C4 separator (6), a B1 separator (11) is arranged on one side of the calcining furnace (9), a B2 separator (12) is arranged on one side of the B1 separator (11), an L1 cooling cylinder (13) is arranged below the B2 separator (12), and a first air blower (14) is arranged on one side of the L1 cooling cylinder (13), b2 separator (12) one side is provided with L2 cooling cylinder (16), L2 cooling cylinder (16) external connection has second air-blower (15), L2 cooling cylinder (16) one side is provided with B3 separator (17), B3 separator (17) one side is provided with dust collector (18), dust collector (18) one side is provided with exhaust fan (19),and zipper machines (20) are arranged outside the L1 cooling cylinder (13), the L2 cooling cylinder (16) and the dust collector (18).
2. The coal-based kaolin calcination device according to claim 1, characterized in that: said C is0Air outlet pipes are respectively arranged on the separator (1), the C1 separator (3), the C2 separator (4) and the C3 separator (5).
3. The coal-based kaolin calcination device according to claim 1, characterized in that: the first blower (14) is fixedly installed at the bottom of the L1 cooling cylinder (13), and the first blower (14) is in through connection with the L1 cooling cylinder (13).
4. The coal-based kaolin calcination device according to claim 1, characterized in that: the second blower (15) is fixedly arranged at the bottom of the L2 cooling cylinder (16), and the second blower (15) is communicated with the L2 cooling cylinder (16).
5. The coal-based kaolin calcination device according to claim 1, characterized in that: an emergency discharge port is arranged below the L1 cooling cylinder (13).
6. The coal-based kaolin calcination device according to claim 1, characterized in that: an emergency discharge port is arranged below the L2 cooling cylinder (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122415427.6U CN215798531U (en) | 2021-10-08 | 2021-10-08 | Coal series kaolin calcining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122415427.6U CN215798531U (en) | 2021-10-08 | 2021-10-08 | Coal series kaolin calcining device |
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| Publication Number | Publication Date |
|---|---|
| CN215798531U true CN215798531U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122415427.6U Active CN215798531U (en) | 2021-10-08 | 2021-10-08 | Coal series kaolin calcining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215798531U (en) |
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2021
- 2021-10-08 CN CN202122415427.6U patent/CN215798531U/en active Active
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