CN112679115A - Lime stone powder process calcines rotary kiln - Google Patents
Lime stone powder process calcines rotary kiln Download PDFInfo
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- CN112679115A CN112679115A CN202011600980.0A CN202011600980A CN112679115A CN 112679115 A CN112679115 A CN 112679115A CN 202011600980 A CN202011600980 A CN 202011600980A CN 112679115 A CN112679115 A CN 112679115A
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- kiln
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- 235000019738 Limestone Nutrition 0.000 title claims abstract description 50
- 239000006028 limestone Substances 0.000 title claims abstract description 50
- 239000000843 powder Substances 0.000 title abstract description 46
- 238000000034 method Methods 0.000 title abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 238000001354 calcination Methods 0.000 claims abstract description 34
- 238000010298 pulverizing process Methods 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 49
- 230000000875 corresponding Effects 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 230000000670 limiting Effects 0.000 claims description 8
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000000149 penetrating Effects 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 42
- 239000003546 flue gas Substances 0.000 abstract description 42
- 239000007789 gas Substances 0.000 abstract description 34
- 230000000694 effects Effects 0.000 abstract description 24
- 239000000292 calcium oxide Substances 0.000 abstract description 22
- 235000012255 calcium oxide Nutrition 0.000 abstract description 22
- 239000000498 cooling water Substances 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000015450 Tilia cordata Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000002035 prolonged Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229960003563 Calcium Carbonate Drugs 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000003932 Urinary Bladder Anatomy 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drugs Drugs 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000003116 impacting Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011068 load Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention belongs to the technical field of limestone preparation, and particularly relates to a rotary kiln for pulverizing and calcining limestone, which ensures that flue gas is fully contacted with limestone powder in the process of calcining the limestone powder into quicklime powder, thereby improving the calcining effect; in the process of cooling the quicklime powder, the cooling water in the cooling pipe positioned at the inner side of the kiln body can timely enter the part of the cooling pipe positioned at the outer side of the kiln body for heat dissipation, so that the cooling effect is improved; according to the invention, the annular sealing groove is formed on the end face of the kiln body, which is in contact with the feeding pipeline, and the high-pressure gas ring is formed in the sealing groove, so that the air pressure in the sealing groove and the air pressure in the kiln body tend to be balanced, and the high-pressure flue gas leakage is avoided.
Description
Technical Field
The invention belongs to the technical field of limestone preparation, and particularly relates to a rotary kiln for pulverizing and calcining limestone.
Background
The main component of limestone is calcium carbonate, the limestone can be directly processed into stone or calcined into quicklime powder, the quicklime powder is a common drying agent for removing water vapor by adopting a chemical absorption method, and the quicklime powder is also used for steel, pesticides, medicines, drying agents, tanning, alcohol dehydration and the like. In the process of preparing quicklime powder from limestone, the limestone needs to be crushed and ground into limestone powder, and then the limestone powder is sent into a rotary kiln to be calcined to obtain quicklime powder. The prior rotary kiln for pulverizing and calcining limestone has the following problems in use: (1) the flow path of the flue gas is constant in the calcining process, the flue gas cannot be fully contacted with limestone, and the calcining effect is poor; (2) when the calcined quicklime powder is cooled, the cooling liquid cannot dissipate heat in time, and the cooling effect is poor; (3) because the flue gas temperature is higher when the limestone is calcined, the air pressure in the kiln body of the rotary kiln is higher than the external air pressure, and the flue gas in the kiln body is easy to leak under the action of the air pressure.
Disclosure of Invention
Technical problem to be solved
The invention provides a rotary kiln for pulverizing and calcining limestone, and aims to solve the following problems in the use of the conventional rotary kiln for pulverizing and calcining limestone: (1) the flow path of the flue gas is constant in the calcining process, the flue gas cannot be fully contacted with limestone, and the calcining effect is poor; (2) when the calcined quicklime powder is cooled, the cooling liquid cannot dissipate heat in time, and the cooling effect is poor; (3) because the flue gas temperature is higher when the limestone is calcined, the air pressure in the kiln body of the rotary kiln is higher than the external air pressure, and the flue gas in the kiln body is easy to leak under the action of the air pressure.
(II) technical scheme
In order to solve the technical problems, the invention adopts the following technical scheme:
a rotary kiln for pulverizing and calcining limestone comprises a feed pipeline, a cylindrical kiln body is rotatably arranged at the bottom end opening of the feed pipeline, and a first gear which is coincident with the axis of the kiln body is fixedly arranged on the outer wall of the kiln body. The bottom port department fixed mounting of kiln body has the circular shape closing plate, rotates on the closing plate to install the admission line rather than the axis coincidence. And a plurality of discharge ports are formed in the position, between the sealing plate and the port of the air inlet pipeline, on the side wall of the kiln body. And a limiting ring which is superposed with the axis of the kiln body is rotatably arranged outside the kiln body. The spacing ring is fixedly arranged on the base through a bracket. A driving motor is fixedly arranged on the base through a motor base, and a second gear meshed with the first gear is fixedly arranged on an output shaft of the driving motor. The driving motor drives the second gear to rotate, and the second gear drives the first gear and the kiln body to synchronously rotate under the limiting effect of the limiting ring. High-temperature flue gas enters the interior of the kiln body through the gas inlet pipeline, and limestone powder enters the kiln body through the feed pipeline. The high-temperature flue gas contacts and reacts with limestone powder in the kiln body, the limestone powder is converted into quicklime powder, and the high-temperature flue gas enters the existing flue gas treatment equipment through a feeding pipeline for treatment and then is discharged; the quicklime powder leaves the kiln body through the discharge hole, and the quicklime powder is received through the existing material receiving equipment.
And an annular plate positioned inside the kiln body is fixedly arranged on the outer wall of the air inlet pipeline. And the surface of the annular plate facing the feeding pipeline is provided with an air guide cylinder which is coincident with the axis of the kiln body. A plurality of annular cooling pipes are uniformly and fixedly arranged on the kiln body along the circumferential direction of the kiln body, and cooling liquid is filled in the cooling pipes. The cooling tube is located sliding seal cooperation and has the iron sheet on the inside inner wall of kiln body, and the position sliding seal that corresponds the iron sheet on the cooling tube outer wall has the magnet ring. And a return spring is fixedly connected between the iron sheet and the inner wall of the cooling pipe. The end surface of the air guide cylinder facing the feeding pipeline is wavy and is matched with the magnet ring. The quicklime powder leaving the kiln body is contacted with the cooling pipe and then transfers heat to the cooling pipe, and the cooling water in the cooling pipe dissipates the heat to the air outside the kiln body, so that the quicklime powder is cooled. The kiln body drives the cooling pipe, the iron sheet, the magnet ring and the reset spring to synchronously rotate in the rotating process. Because the end face of the gas cylinder facing the feeding pipeline is wavy and is matched with the magnet ring, the magnet ring can move along the cooling pipe under the thrust action of the end face of the gas cylinder along with the rotation of the kiln body. Because there is attractive force between the magnet ring and the iron sheet, the magnet ring can drive the iron sheet to move synchronously when moving, and the iron sheet stretches the return spring. Along with the continuous rotation of the kiln body, the resilience force of the reset spring can drive the iron sheet to reset, and the magnet ring is reset synchronously. Along with the continuous rotation of kiln body, magnet ring and iron sheet reciprocating motion, the iron sheet promotes the interior cooling water reciprocating flow of cooling tube for the cooling water that is located kiln body inboard in the cooling tube can in time get into the partial heat dissipation that the cooling tube is located the kiln body outside, has improved the cooling effect to the lime powder.
An annular groove coincident with the axis of the kiln body is formed in one side, close to the feeding pipeline, of the cooling pipe inside the kiln body, and an air guide disc is rotatably installed inside the kiln body through the annular groove. The air guide disc comprises a plurality of first magnet blocks which are uniformly distributed in the annular groove. The first magnet block is in sliding fit with the annular groove, and the first magnet block is fixedly provided with a connecting rod arranged along the radial direction of the kiln body. The inner end of the connecting rod is fixedly provided with a circular disc which is coincident with the axis of the kiln body. A plurality of vent grooves are uniformly arranged on the circular disc along the circumferential direction of the circular disc in a penetrating way. And a third gear which is superposed with the axis of the circular disc is rotatably arranged at the position of the outer surface of the kiln body corresponding to the circular disc. A plurality of second magnet blocks corresponding to the first magnet blocks are uniformly and fixedly arranged on the inner wall of the third gear. The driving motor is a double-shaft motor, and a fourth gear meshed with the third gear is fixedly mounted on the other output shaft of the driving motor. The fourth gear is driven to rotate by the driving motor, the fourth gear drives the third gear and the second magnet block to rotate, and the third gear and the kiln body rotate in opposite directions. Because the second magnet block and the first magnet block have attractive force, the second magnet block can drive the first magnet block to slide in the annular groove when rotating. The first magnet block drives the connecting rod and the circular disk to rotate when sliding in the annular groove. The flue gas flowing out of the gas guide cylinder flows along the axial direction of the kiln body, and the flue gas moves along the circumferential direction of the kiln body after passing through the vent grooves on the circular disc, so that the flue gas is fully contacted with the limestone powder, and the calcining effect is improved.
As a preferable technical scheme of the invention, the surface of the air guide disc facing the air guide cylinder is provided with a hemispherical air guide plate, and the edge of the air guide plate is aligned with the air channel. The flue gas that flows from the gas guide cylinder flows to the air duct under the guide effect of air deflector, has avoided the flue gas to strike and cause the velocity loss on the circular dish, guarantees that the flue gas acts on the limestone flour with higher flow velocity, improves the effect of calcining.
As a preferable technical scheme of the invention, a plurality of balls which are in rolling fit with the end face of the gas cylinder facing the feeding pipeline are uniformly arranged on the end face of the magnet ring, so that the friction force between the magnet ring and the end face of the gas cylinder is reduced, and the service life of the magnet ring and the gas cylinder is prolonged.
In a preferred embodiment of the invention, a gas nozzle is connected to the surface of the circular plate facing the feed channel at a position corresponding to each vent groove by a flexible tube. The surface of the circular disc is symmetrically hinged with elastic telescopic rods at two sides of the vent groove, and the end parts of the elastic telescopic rods are hinged on the air injection head. And a third magnet block is fixedly arranged on the air injection head through a mounting rod. And a plurality of fourth magnet blocks corresponding to the third magnet blocks are fixedly arranged on the inner wall of the kiln body along the circumferential direction of the inner wall. The smoke flowing out of the vent groove enters the air nozzle after passing through the flexible pipeline and is sprayed out of the air nozzle. The circular disc drives the flexible pipeline, the air nozzle, the elastic telescopic rod, the mounting rod and the third magnet block to synchronously rotate when rotating. When the third magnet block and the fourth magnet block enter the corresponding positions, the third magnet block, the mounting rod and the gas nozzle are pushed to move towards the direction far away from the inner wall of the kiln body by the mutual repulsion force existing between the third magnet block and the fourth magnet block. After the third magnet piece and the fourth magnet piece leave the position that corresponds each other, mutual repulsion disappears, and the resilience force of elasticity telescopic link drives third magnet piece, installation pole and jet head and resets. Along with the reciprocating swing of the air nozzle, the flue gas is more fully contacted with the limestone powder, and the calcining effect is further improved.
As a preferable technical scheme of the invention, the edge of the section of the cooling pipe positioned outside the kiln body is regularly wavy so as to increase the contact area of the cooling pipe and the air outside the kiln body and improve the heat dissipation effect.
As a preferable technical scheme of the invention, a first flange plate which is coincident with the axis of the kiln body is fixedly arranged on the outer wall of the kiln body. And a second flange plate matched with the first flange plate is rotatably arranged on the outer wall of the feeding pipeline. A plurality of first threaded holes are uniformly formed in the first flange plate. And a second threaded hole matched with the first threaded hole is formed in the second flange plate. And a threaded rod is rotatably arranged in the second threaded hole. A first air passage communicated with the first threaded hole is formed in the position, corresponding to the first threaded hole, in the first flange plate, and a sealing column axially arranged along the threaded rod is arranged in the first air passage in a sliding fit mode. Sealed post one end fixed mounting has the bearing piece of mutually supporting with the threaded rod tip, fixedly connected with supporting spring between the sealed post other end and the first gas duct inner wall. An annular first sealing groove is formed in the end face of the kiln body. And a second sealing groove matched with the first sealing groove is formed in the end face of the feeding pipeline. A second air passage communicated with the first air passage and the first sealing groove is formed in the position, corresponding to the first air passage, in the kiln body. A flexible air bag communicated with the second air passage is fixedly arranged in the first sealing groove corresponding to the position of the second air passage. And in the process of loading the threaded rod into the second threaded hole and the first threaded hole, the threaded rod is attached to the bearing sheet and pushes the bearing sheet and the sealing column to slide along the first air passage, and the supporting spring is compressed. The air in the first air passage and the second air passage enters the flexible air bag. The volume expansion makes inside the outside air pressure increase that is located flexible gasbag of first seal groove and second seal groove after flexible gasbag aerifys to form high-pressure gas ring in first seal groove and second seal groove, and then make the interior gas pressure of first seal groove and second seal groove and kiln body internal gas pressure tend to balance, avoided high-pressure flue gas to leak. The kiln body drives the first flange plate and the second flange plate to synchronously rotate when rotating, and the air pressure in the first sealing groove and the second sealing groove can be kept constant.
(III) advantageous effects
The invention has at least the following beneficial effects:
(1) the invention solves the following problems existing in the prior rotary kiln for pulverizing and calcining limestone powder: the flow path of the flue gas is constant in the calcining process, the flue gas cannot be fully contacted with limestone, and the calcining effect is poor; when the calcined quicklime powder is cooled, the cooling liquid cannot dissipate heat in time, and the cooling effect is poor; because the flue gas temperature is higher when the limestone is calcined, the air pressure in the kiln body of the rotary kiln is higher than the external air pressure, and the flue gas in the kiln body is easy to leak under the action of the air pressure.
(2) In the process of calcining the limestone powder into the quicklime powder, the flue gas flows along the axial direction of the kiln body and moves along the circumferential direction of the kiln body through the rotation of the gas guide disc, so that the flue gas is fully contacted with the limestone powder, and the calcining effect is improved. According to the invention, through the reciprocating swing of the air nozzle, the flue gas is more fully contacted with the limestone powder, and the calcining effect is further improved.
(3) In the process of calcining the limestone powder into the quicklime powder and cooling the quicklime powder, the iron sheet reciprocates in the cooling pipe to enable the cooling water in the cooling pipe to circularly and reciprocally flow, so that the cooling water in the cooling pipe on the inner side of the kiln body can timely enter the cooling pipe on the outer side of the kiln body to dissipate heat, and the cooling effect is improved.
(4) According to the invention, the annular sealing groove is formed on the end face of the kiln body, which is in contact with the feeding pipeline, and the high-pressure gas ring is formed in the sealing groove, so that the air pressure in the sealing groove and the air pressure in the kiln body tend to be balanced, and the high-pressure flue gas leakage is avoided.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the internal structure of a rotary kiln for pulverizing and calcining limestone in an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is an enlarged schematic view at B of FIG. 1;
FIG. 4 is an enlarged schematic view at C of FIG. 1;
FIG. 5 is a schematic perspective view of an air guide plate according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of a gas cylinder according to an embodiment of the present invention;
FIG. 7 is a sectional view of a cooling tube located outside a kiln body in an embodiment of the invention.
In the figure: 1-feeding pipeline, 2-kiln body, 3-first gear, 4-sealing plate, 5-air inlet pipeline, 6-discharge hole, 7-spacing ring, 8-base, 9-driving motor, 10-second gear, 11-annular plate, 12-air guide cylinder, 13-cooling pipe, 14-iron sheet, 15-magnet ring, 16-reset spring, 17-air guide disc, 171-first magnet block, 172-connecting rod, 173-circular disc, 174-air channel, 18-third gear, 19-second magnet block, 20-fourth gear, 21-air guide plate, 22-ball, 23-flexible pipeline, 24-air jet head, 25-elastic telescopic rod, 26-mounting rod, 27-third magnet block, 28-a fourth magnet block, 29-a first flange plate, 30-a second flange plate, 31-a first threaded hole, 32-a second threaded hole, 33-a threaded rod, 34-a first air channel, 35-a sealing column, 36-a bearing sheet, 37-a supporting spring, 38-a first sealing groove, 39-a second sealing groove, 40-a second air channel and 41-a flexible air bag.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 7, the present embodiment provides a rotary kiln for pulverizing and calcining limestone, which includes a feed pipe 1, a cylindrical kiln body 2 is rotatably mounted at a bottom port of the feed pipe 1, and a first gear 3 coinciding with an axis of the kiln body 2 is fixedly mounted on an outer wall of the kiln body 2. The bottom port department fixed mounting of kiln body 2 has circular shape closing plate 4, rotates on closing plate 4 to install with its axis coincidence's inlet duct 5. A plurality of discharge holes 6 are arranged on the side wall of the kiln body 2 between the sealing plate 4 and the port of the air inlet pipeline 5. A limiting ring 7 which is coincident with the axis of the kiln body is rotatably arranged outside the kiln body 2. The spacing ring 7 is fixedly arranged on the base 8 through a bracket. A driving motor 9 is fixedly mounted on the base 8 through a motor base, and a second gear 10 meshed with the first gear 3 is fixedly mounted on an output shaft of the driving motor 9.
And an annular plate 11 positioned inside the kiln body 2 is fixedly arranged on the outer wall of the air inlet pipeline 5. The surface of the annular plate 11 facing the feed conduit 1 is fitted with gas cylinders 12 coinciding with the axis of the kiln body 2. A plurality of annular cooling pipes 13 are uniformly and fixedly arranged on the kiln body 2 along the circumferential direction of the kiln body, and cooling liquid is filled in the cooling pipes 13. The inner wall of the cooling pipe 13 positioned in the kiln body 2 is matched with an iron sheet 14 in a sliding and sealing way, and the outer wall of the cooling pipe 13 is matched with a magnet ring 15 in a sliding way at the position corresponding to the iron sheet 14. A return spring 16 is fixedly connected between the iron sheet 14 and the inner wall of the cooling pipe 13. The end face of the gas cylinder 12 facing the feed conduit 1 is corrugated and cooperates with a magnet ring 15. The end face of the magnet ring 15 is uniformly provided with a plurality of balls 22 which are in rolling fit with the end face of the gas cylinder 12 facing the feeding pipeline 1, so that the friction force between the magnet ring 15 and the end face of the gas cylinder 12 is reduced, and the service life of the magnet ring 15 and the gas cylinder 12 is prolonged. The quicklime powder before leaving the kiln body 2 contacts the cooling pipe 13 and then transfers heat to the cooling pipe 13, and the cooling water in the cooling pipe 13 radiates the heat to the air outside the kiln body 2, so that the quicklime powder is cooled. The edge of the section of the cooling pipe 13 positioned outside the kiln body 2 is regularly wavy so as to increase the contact area between the cooling pipe 13 and the air outside the kiln body 2 and improve the heat dissipation effect. The kiln body 2 drives the cooling pipe 13, the iron sheet 14, the magnet ring 15 and the return spring 16 to synchronously rotate in the rotating process. Since the end surface of the gas cylinder 12 facing the feed conduit 1 is corrugated and cooperates with the magnet ring 15, the magnet ring 15 is moved along the cooling pipe 13 by the thrust of the end surface of the gas cylinder 12 as the kiln body 2 rotates. Because of the attraction between the magnet ring 15 and the iron piece 14, the magnet ring 15 moves to drive the iron piece 14 to move synchronously, and the iron piece 14 stretches the return spring 16. With the continuous rotation of the kiln body 2, the resilience force of the return spring 16 drives the iron sheet 14 to return, and the magnet ring 15 returns synchronously. Along with the continuous rotation of kiln body 2, magnet ring 15 and iron sheet 14 reciprocating motion, iron sheet 14 promotes the cooling water reciprocating flow in the cooling tube 13 for the cooling water that is located kiln body 2 inboard in the cooling tube 13 can in time get into the partial heat dissipation that is located kiln body 2 outside of cooling tube 13, has improved the cooling effect to the lime powder.
An annular groove 16 coinciding with the axis of the kiln body 2 is formed in one side, close to the feeding pipeline 1, of the cooling pipe 13 inside the kiln body 2, and an air guide disc 17 is rotatably installed inside the kiln body 2 through the annular groove 16. The air guide plate 17 includes a plurality of first magnet blocks 171 uniformly distributed in the annular groove 16. The first magnet block 171 is slidably fitted into the annular groove 16, and the first magnet block 171 is fixedly provided with a connecting rod 172 arranged along the radial direction of the kiln body 2. The inner end of the connecting rod 172 is fixedly provided with a circular disc 173 coinciding with the axis of the kiln body 2. A plurality of ventilation grooves 174 are uniformly formed on the circular plate 173 along the circumferential direction thereof. A third gear 18 which is coincident with the axis of the circular disc 173 is rotatably mounted on the outer surface of the kiln body 2 at a position corresponding to the circular disc 173. A plurality of second magnet blocks 19 corresponding to the first magnet blocks 171 are uniformly and fixedly mounted on the inner wall of the third gear 18. The driving motor 9 is a double-shaft motor, and a fourth gear 20 meshed with the third gear 18 is fixedly mounted on the other output shaft of the driving motor 9. The fourth gear 20 is driven to rotate by the driving motor 9, the fourth gear 20 drives the third gear 18 and the second magnet block 19 to rotate, and the third gear 18 rotates in the opposite direction to the kiln body 2. Because of the attraction between the second magnet piece 19 and the first magnet piece 171, the rotation of the second magnet piece 19 causes the first magnet piece 171 to slide in the annular groove 16. The first magnet 171 slides in the annular groove 16 to rotate the connecting rod 172 and the circular disk 173. The flue gas flowing out of the gas guide cylinder 12 flows along the axial direction of the kiln body 2, and the flue gas moves along the circumferential direction of the kiln body 2 after passing through the ventilation grooves 174 on the circular disc 173, so that the flue gas is fully contacted with the limestone powder, and the calcining effect is improved. The surface of the air guide plate 17 facing the air guide cylinder 12 is provided with a hemispherical air guide plate 21, and the edge of the air guide plate 21 is aligned with the vent groove 174. The flue gas flowing out of the gas cylinder 12 flows to the vent groove 174 under the guiding action of the gas guide plate 21, so that the speed loss caused by the flue gas impacting on the circular disc 173 is avoided, the flue gas is ensured to act on the limestone powder at a higher flowing speed, and the calcining effect is improved.
The surface of the circular plate 173 facing the feed pipe 1 is connected to the gas showerhead 24 through the flexible pipe 23 at a position corresponding to each vent groove 174. The elastic telescopic rods 25 are symmetrically hinged on both sides of the ventilation groove 174 on the surface of the circular plate 173, and the ends of the elastic telescopic rods 25 are hinged on the air nozzle 24. The air nozzle 24 is fixedly provided with a third magnet block 27 by a mounting rod 26. A plurality of fourth magnet blocks 28 corresponding to the third magnet blocks 27 are fixedly arranged on the inner wall of the kiln body 2 along the circumferential direction. The flue gas flowing from the vent slot 174 passes through the flexible conduit 23 and enters the jet head 24 and is ejected from the jet head 24. The circular plate 173 rotates to drive the flexible pipe 23, the air nozzle 24, the elastic telescopic rod 25, the mounting rod 26 and the third magnet block 27 to synchronously rotate. When the third magnet block 27 and the fourth magnet block 28 enter the positions corresponding to each other, the third magnet block 27, the mounting rod 26 and the gas nozzle 24 are pushed to move away from the inner wall of the kiln body 2 by the repulsive force between the third magnet block 27 and the fourth magnet block 28. When the third magnet block 27 and the fourth magnet block 28 leave the corresponding positions, the repulsive force disappears, and the third magnet block 27, the mounting rod 26 and the air nozzle 24 are reset by the repulsive force of the elastic expansion link 25. Along with the reciprocating swing of the air nozzle 24, the flue gas is more fully contacted with the limestone powder, and the calcining effect is further improved.
A first flange 29 which is coincident with the axis of the kiln body 2 is fixedly arranged on the outer wall of the kiln body. A second flange 30 is rotatably mounted on the outer wall of the feed pipe 1 and co-operates with the first flange 29. The first flange 29 is uniformly provided with a plurality of first threaded holes 31. The second flange 30 is provided with a second threaded hole 32 which is matched with the first threaded hole 31. A threaded rod 33 is rotatably mounted in the second threaded bore 32. The first flange 29 is provided with a first air passage 34 corresponding to the first threaded hole 31 and communicated with the first threaded hole 31, and the first air passage 34 is internally and slidably matched with a sealing column 35 axially arranged along the threaded rod 33. One end of the sealing column 35 is fixedly provided with a bearing sheet 36 matched with the end part of the threaded rod 33, and a supporting spring 37 is fixedly connected between the other end of the sealing column 35 and the inner wall of the first air passage 34. An annular first sealing groove 38 is formed in the end face of the kiln body 2. The end face of the feed pipe 1 is provided with a second sealing groove 39 which is matched with the first sealing groove 38. A second air passage 40 communicating the first air passage 34 and the first sealing groove 38 is formed in the kiln body 2 at a position corresponding to the first air passage 34. A flexible air bag 41 communicated with the second air passage 40 is fixedly arranged in the first sealing groove 38 corresponding to the position of the second air passage 40. During the process of installing the threaded rod 33 into the second threaded hole 32 and the first threaded hole 31, the threaded rod 33 is attached to the supporting sheet 36 and pushes the supporting sheet 36 and the sealing column 35 to slide along the first air passage 34, and the supporting spring 37 is compressed. The air in first airway 34 and second airway 40 enters flexible bladder 41. After the flexible air bag 41 is inflated, the volume expansion enables the air pressure inside the first sealing groove 38 and the second sealing groove 39 and outside the flexible air bag 41 to be increased, so that high-pressure air rings are formed in the first sealing groove 38 and the second sealing groove 39, the air pressure inside the first sealing groove 38 and the second sealing groove 39 and the air pressure inside the kiln body 2 tend to be balanced, and high-pressure smoke gas leakage is avoided. When the kiln body 2 rotates, the first flange 29 and the second flange 30 are driven to rotate synchronously, and the air pressure in the first sealing groove 38 and the second sealing groove 39 can be kept constant.
The working process of the rotary kiln for pulverizing and calcining limestone in the embodiment is as follows: the threaded rod 33 is fitted into the second threaded hole 32 and the first threaded hole 31. The driving motor 9 drives the second gear 10 to rotate, and the second gear 10 drives the first gear 3 and the kiln body 2 to synchronously rotate under the limiting action of the limiting ring 7. High-temperature flue gas enters the interior of the kiln body 2 through the gas inlet pipeline 5, and limestone powder enters the kiln body 2 through the feeding pipeline 1. High-temperature flue gas is guided by the gas guide disc 17 in the kiln body 2, then is sprayed out from the gas spray head 24 and is in contact reaction with limestone powder, the limestone powder is converted into quicklime powder, and the high-temperature flue gas enters the existing flue gas treatment equipment through the feeding pipeline 1 for treatment and then is discharged; the quicklime powder leaves the kiln body 2 through the discharge hole 6 and can be accepted through the existing material receiving equipment.
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 (6)
1. A rotary kiln for pulverizing and calcining limestone comprises a feeding pipeline (1), a cylindrical kiln body (2) is rotatably arranged at the bottom port of the feeding pipeline (1), and a first gear (3) which is coincident with the axis of the kiln body (2) is fixedly arranged on the outer wall of the kiln body; the method is characterized in that: a round sealing plate (4) is fixedly arranged at the bottom port of the kiln body (2), and an air inlet pipeline (5) which is superposed with the axis of the sealing plate (4) is rotatably arranged on the sealing plate (4); a plurality of discharge holes (6) are formed in the side wall of the kiln body (2) and positioned between the sealing plate (4) and the port of the air inlet pipeline (5); a limiting ring (7) which is superposed with the axis of the kiln body is rotatably arranged outside the kiln body (2); the limiting ring (7) is fixedly arranged on the base (8) through a bracket; a driving motor (9) is fixedly arranged on the base (8) through a motor base, and a second gear (10) meshed with the first gear (3) is fixedly arranged on an output shaft of the driving motor (9);
an annular plate (11) positioned in the kiln body (2) is fixedly arranged on the outer wall of the air inlet pipeline (5); the surface of the annular plate (11) facing the feeding pipeline (1) is provided with an air guide cylinder (12) which is superposed with the axis of the kiln body (2); a plurality of annular cooling pipes (13) are uniformly and fixedly arranged on the kiln body (2) along the circumferential direction of the kiln body, and cooling liquid is filled in the cooling pipes (13); an iron sheet (14) is arranged on the inner wall of the cooling pipe (13) positioned in the kiln body (2) in a sliding and sealing way, and a magnet ring (15) is arranged on the outer wall of the cooling pipe (13) in a sliding and matching way and corresponds to the position of the iron sheet (14); a return spring (16) is fixedly connected between the iron sheet (14) and the inner wall of the cooling pipe (13); the end surface of the gas cylinder (12) facing the feeding pipeline (1) is wavy and is matched with the magnet ring (15);
an annular groove (16) which is coincident with the axis of the kiln body (2) is formed in one side, close to the feeding pipeline (1), of the cooling pipe (13) in the kiln body (2), and an air guide disc (17) is rotatably installed in the kiln body (2) through the annular groove (16); the air guide disc (17) comprises a plurality of first magnet blocks (171) which are uniformly distributed in the annular groove (16); the first magnet block (171) is in sliding fit with the annular groove (16), and a connecting rod (172) arranged along the radial direction of the kiln body (2) is fixedly arranged on the first magnet block (171); the inner end of the connecting rod (172) is fixedly provided with a circular disc (173) which is superposed with the axis of the kiln body (2); a plurality of vent grooves (174) are uniformly arranged on the circular disc (173) along the circumferential direction of the circular disc in a penetrating way; a third gear (18) which is coincident with the axis of the circular disc (173) is rotatably arranged at the position of the outer surface of the kiln body (2) corresponding to the circular disc (173); a plurality of second magnet blocks (19) corresponding to the first magnet blocks (171) are uniformly and fixedly arranged on the inner wall of the third gear (18); the driving motor (9) is a double-shaft motor, and a fourth gear (20) meshed with the third gear (18) is fixedly mounted on the other output shaft of the driving motor (9).
2. The rotary kiln for pulverizing and calcining limestone as claimed in claim 1, wherein: the surface of the air guide disc (17) facing the air guide cylinder (12) is provided with a hemispherical air guide plate (21), and the edge of the air guide plate (21) is aligned with the vent groove (174).
3. The rotary kiln for pulverizing and calcining limestone as claimed in claim 1, wherein: a plurality of balls (22) which are in rolling fit with the end face of the gas cylinder (12) facing the feeding pipeline (1) are uniformly arranged on the end face of the magnet ring (15).
4. The rotary kiln for pulverizing and calcining limestone as claimed in claim 1, wherein: the surface of the circular disc (173) facing the feeding pipeline (1) is connected with an air nozzle (24) through a flexible pipeline (23) corresponding to the position of each vent groove (174); the surface of the circular disc (173) is positioned at two sides of the vent groove (174) and symmetrically hinged with elastic telescopic rods (25), and the end parts of the elastic telescopic rods (25) are hinged on the air nozzle (24); a third magnet block (27) is fixedly arranged on the air nozzle (24) through a mounting rod (26); a plurality of fourth magnet blocks (28) corresponding to the third magnet blocks (27) are fixedly arranged on the inner wall of the kiln body (2) along the circumferential direction.
5. The rotary kiln for pulverizing and calcining limestone as claimed in claim 1, wherein: the edge of the section of the cooling pipe (13) positioned outside the kiln body (2) is regularly wavy.
6. The rotary kiln for pulverizing and calcining limestone as claimed in claim 1, wherein: a first flange (29) which is superposed with the axis of the kiln body (2) is fixedly arranged on the outer wall of the kiln body; a second flange plate (30) which is matched with the first flange plate (29) is rotatably arranged on the outer wall of the feeding pipeline (1); a plurality of first threaded holes (31) are uniformly formed in the first flange plate (29); a second threaded hole (32) matched with the first threaded hole (31) is formed in the second flange plate (30); a threaded rod (33) is rotatably mounted in the second threaded hole (32); a first air channel (34) communicated with the first threaded hole (31) is formed in the first flange plate (29) at a position corresponding to the first threaded hole (31), and a sealing column (35) axially arranged along the threaded rod (33) is in sliding fit with the first air channel (34); a bearing sheet (36) matched with the end part of the threaded rod (33) is fixedly arranged at one end of the sealing column (35), and a supporting spring (37) is fixedly connected between the other end of the sealing column (35) and the inner wall of the first air channel (34); an annular first sealing groove (38) is formed in the end face of the kiln body (2); a second sealing groove (39) matched with the first sealing groove (38) is formed in the end face of the feeding pipeline (1); a second air passage (40) communicated with the first air passage (34) and the first sealing groove (38) is formed in the kiln body (2) at a position corresponding to the first air passage (34); a flexible air bag (41) communicated with the second air passage (40) is fixedly arranged in the first sealing groove (38) corresponding to the position of the second air passage (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600980.0A CN112679115A (en) | 2020-12-29 | 2020-12-29 | Lime stone powder process calcines rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600980.0A CN112679115A (en) | 2020-12-29 | 2020-12-29 | Lime stone powder process calcines rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112679115A true CN112679115A (en) | 2021-04-20 |
Family
ID=75454347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011600980.0A Withdrawn CN112679115A (en) | 2020-12-29 | 2020-12-29 | Lime stone powder process calcines rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112679115A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1021153A (en) * | 1974-04-22 | 1977-11-22 | Peter Van Boxtel | Method of continuously heating limestone-mud |
| CN204265644U (en) * | 2014-12-10 | 2015-04-15 | 石家庄新华能源环保科技股份有限公司 | Heat storage type lime rotary kiln |
| CN109578719A (en) * | 2019-01-21 | 2019-04-05 | 安庆市鑫华腈工贸有限责任公司 | A kind of sealing flange for pipelines and petrochemical pipelines connection |
| CN210461078U (en) * | 2019-09-09 | 2020-05-05 | 连云港金红矿业有限公司 | Slurry pump for garnet production |
| CN111732350A (en) * | 2020-06-30 | 2020-10-02 | 浙江钙科机械设备有限公司 | Suspension calcining and cooling production system for powdered lime |
| CN112033139A (en) * | 2018-06-28 | 2020-12-04 | 张雨龙 | Use method of flow guide type maintenance equipment for wooden chopping board |
-
2020
- 2020-12-29 CN CN202011600980.0A patent/CN112679115A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1021153A (en) * | 1974-04-22 | 1977-11-22 | Peter Van Boxtel | Method of continuously heating limestone-mud |
| CN204265644U (en) * | 2014-12-10 | 2015-04-15 | 石家庄新华能源环保科技股份有限公司 | Heat storage type lime rotary kiln |
| CN112033139A (en) * | 2018-06-28 | 2020-12-04 | 张雨龙 | Use method of flow guide type maintenance equipment for wooden chopping board |
| CN109578719A (en) * | 2019-01-21 | 2019-04-05 | 安庆市鑫华腈工贸有限责任公司 | A kind of sealing flange for pipelines and petrochemical pipelines connection |
| CN210461078U (en) * | 2019-09-09 | 2020-05-05 | 连云港金红矿业有限公司 | Slurry pump for garnet production |
| CN111732350A (en) * | 2020-06-30 | 2020-10-02 | 浙江钙科机械设备有限公司 | Suspension calcining and cooling production system for powdered lime |
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Application publication date: 20210420 |