CN213506599U - Device for burning high-activity magnesium oxide - Google Patents
Device for burning high-activity magnesium oxide Download PDFInfo
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- CN213506599U CN213506599U CN202021049553.3U CN202021049553U CN213506599U CN 213506599 U CN213506599 U CN 213506599U CN 202021049553 U CN202021049553 U CN 202021049553U CN 213506599 U CN213506599 U CN 213506599U
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Abstract
The utility model provides a burn high active magnesium oxide device, including exhaust-heat boiler, burning furnace and dust collector, the feed inlet of burning furnace passes through the inlet pipe and is connected with the discharge gate of second cyclone, the discharge gate of burning furnace passes through the discharging pipe and is connected with the feed inlet of third cyclone, the discharge gate of third cyclone passes through material pipe and is connected with the feed inlet of fourth cyclone, the air outlet of second fluidized bed passes through the ventilation pipe and is connected with the air intake of sixth cyclone, the air outlet of sixth cyclone, exhaust-heat boiler passes through the ventilation pipe respectively and is connected with the air inlet of dust collector, the air outlet of dust collector passes through first draught fan and chimney connection, the discharge gate of first fluidized bed, second fluidized bed, sixth cyclone and dust collector all is connected with the discharging pipe through the material pipe, the utility model discloses can avoid blocking, the product has high activity, is environment-friendly and energy-saving, and reduces the operation cost.
Description
Technical Field
The utility model relates to a magnesium oxide production facility technical field especially relates to a burn high active magnesium oxide device.
Background
The magnesite with better grade and more than 46.5 percent of magnesium oxide (MgO) in China is remained. A large amount of low-grade ore and magnesite crushed ore need to be fully utilized.
At present, the common traditional equipment for producing high-activity magnesium oxide in China comprises a light-fired shaft kiln, a rotary kiln, a fluidized bed kiln, a suspension roasting furnace, a multi-layer roasting furnace and a reflection kiln, all of which have requirements on the structure of calcined minerals, and screened powder cannot enter the kiln for reuse, so that resources are wasted, the calcination time of uneven blocks and small particles entering the kiln is improperly controlled, under-burning or over-burning is easy to occur, dust leaks out in the process to pollute the environment, the hydration activity is unstable, fine grinding and grading are needed after burning, moisture absorption and secondary pollution are easy to occur in the subsequent process, and the product activity is poor; seriously damaging the environment and being difficult to meet the requirements of environmental protection, energy conservation, emission reduction, reduction of the running cost and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art, and providing a device for burning high-activity magnesium oxide, which can avoid blockage, ensure the separation efficiency, is convenient to replace, ensure the sufficient dispersion of materials and improve the heat exchange efficiency between the materials and the waste gas.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
designing a device for burning high-activity magnesium oxide, which comprises a waste heat boiler, a calcining furnace and a dust collector, wherein a feed inlet of the calcining furnace is connected with a discharge outlet of a second cyclone separator through a feed pipe, a discharge outlet of the calcining furnace is connected with a feed inlet of a third cyclone separator through a discharge pipe, and an air inlet of the calcining furnace is connected with a hot blast stove through a vent pipe;
the air outlet of the third cyclone separator is connected with the air inlet of the second cyclone separator through a vent pipe, the air outlet of the second cyclone separator is connected with the air inlet of the first cyclone separator through a vent pipe, the air outlet of the first cyclone separator is connected with a second induced draft fan through a vent pipe, the discharge hole of the first cyclone separator is connected with the feed inlet of the second cyclone separator through a material pipe, and the discharge hole of the third cyclone separator is connected with the feed inlet of the fourth cyclone separator through a material pipe;
an air outlet of the fourth cyclone separator is connected with an air inlet of the waste heat boiler through a vent pipe, a discharge hole of the fourth cyclone separator is connected with a feed inlet of the first fluidized bed through a material pipe, an air outlet of the first fluidized bed is connected with an air inlet of the fifth cyclone separator through a vent pipe, an air outlet of the fifth cyclone separator is connected with an air inlet of the fourth cyclone separator through a vent pipe, a discharge hole of the fifth cyclone separator is connected with a feed inlet of the second fluidized bed through a material pipe, air inlets of the first fluidized bed and the second fluidized bed are respectively connected with an air dryer through a first air blower and a second air blower, an air outlet of the second fluidized bed is connected with an air inlet of the sixth cyclone separator through a vent pipe, and air outlets of the sixth cyclone separator and the waste heat boiler are respectively connected with an air inlet of a dust collector through vent pipes, the air outlet of the dust collector is connected with the chimney through a first induced draft fan, and discharge holes of the first fluidized bed, the second fluidized bed, the sixth cyclone separator and the dust collector are connected with the discharge pipe through material pipes.
Preferably, the air inlet of the hot blast stove is connected with a primary fan and an air mixing fan through a ventilation pipe, and the hot blast stove is connected with an air supply pipeline through a natural gas connector.
Preferably, the discharge ports of the first cyclone separator, the second cyclone separator, the third cyclone separator, the fourth cyclone separator and the fifth cyclone separator are provided with air locking valves, and the air locking valves are connected with the material pipe.
Preferably, air locking valves are installed at discharge ports of the sixth cyclone separator and the dust collector and connected with the material pipe.
Preferably, pneumatic gate valves are installed at the discharge ports of the first fluidized bed and the second fluidized bed, the pneumatic gate valves are connected with the material pipe, the air inlet of the first fluidized bed is connected with the first air blower, and the air inlet of the second fluidized bed is connected with the second air blower.
Preferably, the air inlet of the waste heat boiler is connected with the air outlet of the cyclone separator through a vent pipe.
The utility model provides a pair of burn high active magnesium oxide device, beneficial effect lies in:
1. various scale calcining high-activity magnesium oxide systems can be customized and developed according to the needs of owners;
2. the heat of the finished product of the magnesium oxide is recovered by adopting the fluidized bed and the combined cyclone cylinder, the discharging conveying equipment can be protected when the fan is stopped, and the burning heat consumption can be less than that: magnesium oxide 1200 Kcal/kg;
3. the external hot-blast stove is adopted for drying, the reaction temperature in the calcining furnace can be flexibly adjusted, and the magnesium oxide is calcined in a reasonable temperature range, so that the activity of the magnesium oxide finished product can be ensured;
4. the material is cooled by dry cold air, so that the activity of magnesium oxide is ensured;
5. the calciner adopts a lower reasonable design wind speed, ensures the proper residence time of materials in the calciner, ensures the material decomposition rate out of the calciner, reduces the pressure loss of the calciner, and can cause over-high temperature blockage and influence gas-solid separation if combustion occurs in a cyclone cylinder;
6. the characteristics of materials are fully considered when the blanking pipes at all levels are designed, so that the material throughput is ensured and the blockage is prevented;
7. the discharging end parts of all levels of cyclones are designed by adopting a material spreading box, so that the material of a discharging pipe is prevented from collapsing and short-circuiting in an air outlet pipe, the sufficient dispersion of the material is ensured, and the heat exchange efficiency between the material and waste gas is improved;
8. the design of an eccentric large volute is adopted for each stage of cyclone, the reasonable wind speeds of an inlet, an outlet and a section of the cyclone are controlled, the separation efficiency of each stage of cyclone is ensured, the pressure loss of the cyclone is reduced, and the pressure loss of the cyclone can be controlled to be 600 plus 1000 pa;
9. the cylinder body of the uppermost stage cyclone separator adopts a large height-diameter ratio design, so that the dust collection efficiency of the cyclone separator is ensured to be more than 90%, and the pressure loss of the cyclone is reduced by adopting a rectifying plate design in the inner cylinder of the stage;
10. the design of the inclined cone and the expansion bin is adopted for each stage of cyclone cylinder, so that the stress balance of the material is damaged, and the material is prevented from arching and blocking on the cone;
11. the inner cylinder of each stage of cyclone at the high-temperature section is designed in a hanging piece mode, so that the replacement is convenient, and the separation efficiency of the cyclone after being used for a period of time is ensured;
12. according to the material characteristics and the temperature condition, the best cyclone body and the best heat-insulating layer material are selected, so that the material is prevented from generating electrostatic adsorption wall hanging blockage in the cyclone, and smooth material blanking is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the device comprises a first cyclone separator 1, a second cyclone separator 2, a third cyclone separator 3, a fourth cyclone separator 4, a fifth cyclone separator 5, a sixth cyclone separator 6, a first fluidized bed 7, a second fluidized bed 8, a first air blower 9, an electromagnetic valve 10, an air dryer 11, a primary air blower 12, an air mixing blower 13, a hot blast stove 14, a waste heat boiler 15, a calcining furnace 16, a discharge pipe 17, a dust collector 18, a first induced draft fan 19, a chimney 20, a pressure gauge 21, a second induced draft fan 22, a second air blower 23, a vent pipe 24, a natural gas connector 25 and a material pipe 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, the utility model provides a burn high active magnesium oxide device, including exhaust-heat boiler 15, forge burning furnace 16 and dust collector 18, the feed inlet of burning furnace 16 passes through inlet pipe 26 and is connected with the discharge gate of second cyclone 2, the discharge gate of burning furnace 16 passes through the discharging pipe and is connected with the feed inlet of third cyclone 3, the air intake of burning furnace 16 passes through ventilation pipe 24 and is connected with hot-blast furnace 14, the air intake of hot-blast furnace 14 is connected with primary air fan 12 and air-mixing fan 13 through ventilation pipe 24, hot-blast furnace 14 passes through natural gas connector 25 and is connected with the gas supply line, the gas supply line provides the natural gas for hot.
The air outlet of the third cyclone separator 3 is connected with the air inlet of the second cyclone separator 2 through a vent pipe 24, the air outlet of the second cyclone separator 2 is connected with the air inlet of the first cyclone separator 1 through a vent pipe 24, the air outlet of the first cyclone separator 1 is connected with a second induced draft fan 22 through a vent pipe 24, the discharge port of the first cyclone separator 1 is connected with the feed port of the second cyclone separator 2 through a material pipe 26, the discharge port of the third cyclone separator 3 is connected with the feed port of the fourth cyclone separator 4 through a material pipe 26, the discharge ports of the first cyclone separator 1, the second cyclone separator 2, the third cyclone separator 3, the fourth cyclone separator 4 and the fifth cyclone separator 5 are all provided with an air locking valve 10, the air locking valve 10 is connected with the material pipe 26 to ensure the material throughput and prevent air leakage, and the inclined cone adopted by the cyclone separators at all levels, The expansion bin is designed to destroy the stress balance of materials and prevent the materials from arching and blocking on a pyramid part, and the inner cylinders of all levels of the cyclone cylinders at the high-temperature section adopt a hanging piece type design, so that the replacement is convenient, and the separation efficiency of the cyclone cylinders after being used for a period of time is ensured.
An air inlet of the waste heat boiler 15 is connected with an air outlet of the cyclone separator 4 through a vent pipe 24, a discharge hole of the fourth cyclone separator 4 is connected with a feed inlet of the first fluidized bed 7 through a material pipe 26, an air outlet of the first fluidized bed 7 is connected with an air inlet of the fifth cyclone separator 5 through the vent pipe 24, an air outlet of the fifth cyclone separator 5 is connected with an air inlet of the fourth cyclone separator 4 through the vent pipe 24, a discharge hole of the fifth cyclone separator 5 is connected with a feed inlet of the second fluidized bed 8 through the material pipe 26, air inlets of the first fluidized bed 7 and the second fluidized bed 8 are respectively connected with the air dryer 11 through a first air blower 9 and a second air blower 23, an air outlet of the second fluidized bed 8 is connected with an air inlet of the sixth cyclone separator 6 through the vent pipe 24, pneumatic gate valves are respectively arranged at discharge holes of the sixth cyclone separator 6 and the dust collector 18, the pneumatic gate valve is connected with a material pipe 26, air outlets of the sixth cyclone separator 6 and the waste heat boiler 15 are respectively connected with an air inlet of a dust collector 18 through a vent pipe 24, an air outlet of the dust collector 18 is connected with a chimney 20 through a first induced draft fan 19, discharge ports of the first fluidized bed 7, the second fluidized bed 8, the sixth cyclone separator 6 and the dust collector 18 are respectively connected with a discharge pipe 17 through the material pipe 26, discharge ports of the first fluidized bed 7 and the second fluidized bed 8 are respectively provided with a pressure valve 21, a pressure gauge 21 is connected with the material pipe 26, an air inlet of the first fluidized bed 7 is connected with a first air blower 9, and an air inlet of the second fluidized bed 8 is connected with a second air blower 23.
The working process is as follows: firstly, the pulverized magnesite fine material is sent to an air outlet of a third cyclone separator 3, the magnesite fine material is mixed with hot air at an outlet of the third cyclone separator 3 to exchange heat under the action of a second induced draft fan 22, the temperature of the hot air is reduced after heat exchange, the temperature of the material is increased, the hot air and the material enter a second cyclone separator 2 together, gas and solid are separated in the second cyclone separator 2, a separated solid material calcining furnace is fed, the magnesite guarantees a certain retention time in a temperature field in the calcining furnace until the calcining decomposition is finished, the calcining furnace adopts a hot air furnace for heat supply, an external hot air furnace can flexibly adjust the outlet temperature, magnesium oxide is calcined in a reasonable temperature range, the activity of a magnesium oxide finished product can be guaranteed, and the magnesite fine material remained in the air after passing through the second cyclone separator 2 is sent to the first cyclone separator 1 to be continuously separated, feeding the separated residual solid material into an air outlet of a third cyclone separator 3, flowing into a second cyclone separator 2 again for separation, and discharging the gas separated by the first cyclone separator 1 through a second induced draft fan 22; the magnesium oxide finished product decomposed by the calcining furnace 16 enters the third cyclone separator 3 for gas-solid separation under the action of wind, the separated solid material flows to an air outlet of the fifth cyclone separator 5, enters the fourth cyclone separator 4 under the action of wind, then the fourth cyclone separator 4 carries out gas-solid separation again, the gas separated by the fourth cyclone separator 4 enters the waste heat boiler 15 for heat recovery, the solid material is recovered by the dust collector 18 after the heat recovery is finished, the recovered wind is discharged from the chimney 20 under the action of the first induced draft fan 19, the solid material separated by the fourth cyclone separator 4 enters the first fluidized bed 7, the first air blower 9 sends the air treated by the air dryer 11 into the first fluidized bed 7 for cooling treatment, and the solid material blown away by the first air blower 9 enters the fifth cyclone separator 5 for separation, the separated gas enters the fourth cyclone separator 4, the separated solid material enters the second fluidized bed 8, the solid material is cooled again under the action of the second air blower 23, the solid material taken away by the air enters the sixth cyclone separator 6 for separation, the residual solid material after separation enters the dust collector 18 for dust treatment, and the solid material treated by the first fluidized bed 7, the second fluidized bed 8, the sixth cyclone separator 6 and the dust collector 18 enters the discharge pipe 17 through the material pipe 26 for material collection and storage.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The device for burning the high-activity magnesium oxide comprises a waste heat boiler (15), a calcining furnace (16) and a dust collector (18), and is characterized in that: the feeding hole of the calcining furnace (16) is connected with the discharging hole of the second cyclone separator (2) through a material pipe (26), the discharging hole of the calcining furnace (16) is connected with the feeding hole of the third cyclone separator (3) through a discharging pipe, and the air inlet of the calcining furnace (16) is connected with the hot blast stove (14) through a vent pipe (24);
the air outlet of the third cyclone separator (3) is connected with the air inlet of the second cyclone separator (2) through a vent pipe (24), the air outlet of the second cyclone separator (2) is connected with the air inlet of the first cyclone separator (1) through the vent pipe (24), the air outlet of the first cyclone separator (1) is connected with a second induced draft fan (22) through the vent pipe (24), the discharge hole of the first cyclone separator (1) is connected with the feed inlet of the second cyclone separator (2) through a material pipe (26), and the discharge hole of the third cyclone separator (3) is connected with the feed inlet of the fourth cyclone separator (4) through the material pipe (26);
an air outlet of the fourth cyclone separator (4) is connected with an air inlet of the waste heat boiler (15) through a vent pipe (24), a discharge outlet of the fourth cyclone separator (4) is connected with a feed inlet of the first fluidized bed (7) through a material pipe (26), an air outlet of the first fluidized bed (7) is connected with an air inlet of the fifth cyclone separator (5) through the vent pipe (24), an air outlet of the fifth cyclone separator (5) is connected with an air inlet of the fourth cyclone separator (4) through the vent pipe (24), a discharge outlet of the fifth cyclone separator (5) is connected with a feed inlet of the second fluidized bed (8) through the material pipe (26), an air inlet of the first fluidized bed (7) is connected with the first air blower (9), and an air inlet of the second fluidized bed (8) is connected with the second air blower (23) and the air dryer (11), the air outlet of second fluidized bed (8) passes through the air intake connection of ventilation pipe (24) and sixth cyclone (6), the air outlet of sixth cyclone (6), exhaust-heat boiler (15) is connected with the air inlet of dust collector (18) through ventilation pipe (24) respectively, the air outlet of dust collector (18) is connected with chimney (20) through first draught fan (19), the discharge gate of first fluidized bed (7), second fluidized bed (8), sixth cyclone (6) and dust collector (18) all is connected with discharging pipe (17) through material pipe (26).
2. The device for burning high-activity magnesium oxide according to claim 1, wherein: the air inlet of the hot blast stove (14) is connected with a primary air fan (12) and an air mixing fan (13) through a ventilation pipe (24), and the hot blast stove (14) is connected with an air supply pipeline through a natural gas connecting port (25).
3. The device for burning high-activity magnesium oxide according to claim 1, wherein: the material outlet of each of the first cyclone separator (1), the second cyclone separator (2), the third cyclone separator (3), the fourth cyclone separator (4) and the fifth cyclone separator (5) is provided with an air locking valve (10), and the air locking valve (10) is connected with a material pipe (26).
4. The device for burning high-activity magnesium oxide according to claim 1, wherein: and the discharge ports of the sixth cyclone separator (6) and the dust collector (18) are both provided with an air locking valve and connected with a material pipe (26).
5. The device for burning high-activity magnesium oxide according to claim 1, wherein: pneumatic gate valves (21) are installed at the discharge ports of the first fluidized bed (7) and the second fluidized bed (8), the pneumatic gate valves (21) are connected with the material pipe (26), the air inlet of the first fluidized bed (7) is connected with the first air blower (9), and the air inlet of the second fluidized bed (8) is connected with the second air blower (23).
6. The device for burning high-activity magnesium oxide according to claim 1, wherein: and an air inlet of the waste heat boiler (15) is connected with an air outlet of the fourth cyclone separator (4) through a ventilation pipe (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021049553.3U CN213506599U (en) | 2020-06-09 | 2020-06-09 | Device for burning high-activity magnesium oxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021049553.3U CN213506599U (en) | 2020-06-09 | 2020-06-09 | Device for burning high-activity magnesium oxide |
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| Publication Number | Publication Date |
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| CN213506599U true CN213506599U (en) | 2021-06-22 |
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| CN202021049553.3U Active CN213506599U (en) | 2020-06-09 | 2020-06-09 | Device for burning high-activity magnesium oxide |
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| CN (1) | CN213506599U (en) |
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