CN117049800A - High-stability calcium carbonate suspension calcination system and method - Google Patents
High-stability calcium carbonate suspension calcination system and method Download PDFInfo
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- CN117049800A CN117049800A CN202311128628.5A CN202311128628A CN117049800A CN 117049800 A CN117049800 A CN 117049800A CN 202311128628 A CN202311128628 A CN 202311128628A CN 117049800 A CN117049800 A CN 117049800A
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- Prior art keywords
- calcium carbonate
- filter element
- calciner
- beating
- pipe
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 106
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 53
- 238000001354 calcination Methods 0.000 title claims abstract description 41
- 239000000725 suspension Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 100
- 239000000843 powder Substances 0.000 claims abstract description 83
- 238000010009 beating Methods 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 claims abstract description 33
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000292 calcium oxide Substances 0.000 claims abstract description 29
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims description 36
- 239000007787 solid Substances 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000465 moulding Methods 0.000 abstract description 4
- 208000028659 discharge Diseases 0.000 description 13
- 239000002994 raw material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The application relates to a high-stability calcium carbonate suspension calcination system, which comprises a filter mechanism and a beating mechanism arranged in a flow guide pipe mechanism between a calciner and a cyclone preheater, wherein calcium oxide powder is arranged along with CO 2 When the calcium oxide powder passes through the filter element, the calcium oxide powder can be separated from the filter element and conveyed to the discharge hole at the bottom of the calciner to finish the collection work under the action of the beating mechanism in the material collecting area and the discharging area, and therefore, the filter element in the filter area can keep a normal state during the work, thereby ensuring the CO 2 Can be smoothly discharged, and ensures the stable stability of the inside of the calciner; meanwhile, the hammering mechanism breaks up hardened powder, so that the molding effect of the product is ensured.
Description
Technical Field
The application relates to the technical field of lime production equipment, in particular to a high-stability calcium carbonate suspension calcination system and method.
Background
In the whole process of limestone calcination, the preparation amount of fuel is an important factor influencing the calcination and dissolution of limestone, and the low preparation amount of fuel can lead to low temperature in the furnace body, so that the required regulation is not met, the calcination is insufficient, and the lime calcination is serious; in contrast, the high fuel formulation results in excessive lime burn and thus tends to result in ringing, and therefore, the fuel formulation needs to be suitable and the fuel metering verification is accurate during actual production.
Patent document No. CN109467323A discloses a process device for calcining lime raw material particles suspended in the air by high-temperature gas, which has good calcining quality and high efficiency, can continuously work and reduces labor cost; the technical scheme adopted is as follows: the device comprises a vertical mill, a cyclone separator group, a settling chamber, a raw material bin, a dust remover, a tail exhaust fan, a cyclone preheating system, a cyclone cooling system, a fluidization purifier, a metering feeder, a suspension combustion chamber, a buffer separation cyclone, a cold air inlet and a high-temperature fan, wherein small lime raw material particles which are ground in the vertical mill are brought into the cyclone separator group and the settling chamber to be separated through high-temperature gas, small particle raw materials are stored in the raw material bin and are brought into the cyclone preheating system by hot air to be subjected to preliminary calcination, then enter the suspension combustion chamber to be fully combusted, and finally fall into the cyclone cooling system to be subjected to heat exchange with cold air to realize cooling.
However, in the actual use process, the inventor found that the carbon content of the calcium carbonate in the present application is about 40 to 45% compared with the carbon content of the calcium carbonate in the conventional cement plant processing, and the carbon content of the calcium carbonate in the present application is about 50 to 52%, so that the calcium carbonate is decomposed to produce CO in the calcination process 2 Further, if CO 2 The temperature in the reactor is unstable and the decomposition rate of calcium carbonate becomes low due to the untimely discharge; at the same time, the calcium oxide powder and CO which is not discharged in time during the calcination process can be caused 2 The reverse reaction is carried out to generate calcium carbonate again, thus reducing the decomposition rate of the calcium carbonate.
When traditional calcium carbonate is subjected to suspension calcination, as part of calcium oxide powder is brought out of a calciner and enters a hot gas flow guide pipe by calcium oxide in the calcination process, a filter screen is usually arranged at the inlet of the hot gas flow guide pipe, but the following problems exist in the existing filter screen:
1. after long-term use, the calcium oxide powder can block the mesh holes in the filter screen, and CO 2 The calcium oxide cannot be smoothly discharged, so that the temperature inside the calciner is unstable, and the forming effect of the calcium oxide is affected;
2. the solid powder on the filter holes is not cleaned for a long time, hardening phenomenon can occur, and if the hardened solid powder falls back into the calciner, the forming quality of the product can be reduced.
Disclosure of Invention
The application aims at overcoming the defects of the prior art, and by arranging a high-stability calcium carbonate suspension calcination system, the CO can be ensured by the part of the residual filter element while the filter element is partially dredged by using a smart and simple mechanical structure 2 Continuous stable output, CO 2 The output work of the process and the dredging work of the filter piece are synchronously carried out and do not interfere with each other, so that the effect that the reaction temperature in the calciner is stable and the raw materials fully participate in the calcination in the whole calcium carbonate suspension calcination process is realized.
Aiming at the technical problems, the technical scheme is as follows: a high stability calcium carbonate suspension calcination system comprising:
the upper end of the calciner is connected with a cyclone preheater through a flow guide pipe mechanism, the lower end of the cyclone preheater is connected with a feed inlet in the calciner through a discharge pipe, and the flow guide pipe mechanism comprises a first fixed pipe fixedly connected with the calciner, a second fixed pipe connected with the cyclone preheater and a rotating pipe which is driven by a driving assembly and is rotatably arranged between the first fixed pipe and the second fixed pipe;
the filtering mechanism is arranged in the honeycomb duct mechanism and comprises a filtering piece arranged in the rotary pipe, a separation component and a forming component, wherein the separation component is arranged on two sides of the filtering piece and is used for separating the interior of the rotary pipe into a filtering area, a collecting area and a discharging area;
the two groups of beating mechanisms are respectively arranged in the material collecting area and the material discharging area and are respectively connected with the driving component in a transmission way, and each beating mechanism comprises a supporting component arranged in the honeycomb duct mechanism, a transmission component connected with the driving component and a beating component matched with the transmission component;
during production, some solid powder enters the honeycomb duct mechanism along with hot gas and is filtered by the filter element, and the filtered solid powder can be scattered and separated from the filter element under the action of the beating mechanism.
Preferably, the driving assembly includes a first gear disposed at an outer side of the rotating tube, a second gear engaged with the first gear, and a first driving unit driving the second gear to rotate.
Preferably, the separation component is arranged in the filtering area and comprises a horizontal plate arranged in the middle of the rotating pipe and a vertical plate arranged at the lower end of the horizontal plate, the horizontal plate and the vertical plate are respectively provided with a first baffle and a second baffle at positions corresponding to the material collecting area and the material discharging area, and the first baffle and the second baffle are staggered and a gap for the filter to pass through is reserved between the first baffle and the second baffle.
Preferably, the forming assembly is used for forming the filter element into a plurality of layers of folds, and the forming assembly comprises a plurality of limiting plates which are arranged along the circumferential direction of the rotating tube in an array manner and can enable the filter element to form the plurality of layers of folds, and the limiting plates are arranged on two sides of the filter element.
Preferably, the support assembly comprises a first rotating rod which is arranged on the first baffle plate or the second baffle plate in a transmission manner, a first cam connected with the first rotating rod, a second rotating rod connected with the first cam and a support convex plate connected with the second rotating rod.
Preferably, the transmission assembly comprises a speed reduction unit arranged in a transmission manner with the second gear, a first bevel gear matched with the speed reduction unit and a second bevel gear matched with the first bevel gear.
Preferably, the beating assembly comprises:
the support piece is connected with the middle plate and comprises an upper support plate and a lower support plate which are fixedly arranged with each other;
the first rotating piece comprises a rotating shaft arranged between the upper supporting plate and the lower supporting plate, a plurality of second cams arranged in an array along the axis direction of the rotating shaft and a control wheel arranged outside the rotating shaft, and the control wheel is in transmission connection with the second bevel gear through a connecting belt;
the second rotating piece and the second cam in the first rotating piece are arranged in a staggered manner;
the beating part comprises a beating rod penetrating through the lower supporting plate and being in butt joint with the second cam, a buffer spring arranged at the lower end of the lower supporting plate and connected with the beating rod, and a beating head arranged at the lower end of the beating rod.
Preferably, the rotary pipe is further provided with a material guiding pipe at a position corresponding to the material discharging area, and the material guiding pipe is communicated with a material discharging hole at the bottom of the calciner.
Preferably, the inside of discharging pipe still is provided with the intermittent type feeding mechanism that is used for controlling the intermittent type entering of calcium carbonate powder to calcine inside the stove, and it is including rotating the setting and being in inside and through the rotation wheel of steam drive of second fixed pipe, with the rotation wheel is connected and set up the incomplete gear in the discharging pipe outside, with incomplete gear matched with drive gear and with drive gear is connected and rotates the setting and be in the inside feeding baffle of discharging pipe.
The application also provides a production method applied to the calcium carbonate suspension calcination control system, which comprises the following steps:
step one, a calcination step, in which calcium carbonate powder is fed into a calciner, and is heated by a burner and a hot blast stove, so that calcium oxide and CO are produced from calcium carbonate 2 ，CO 2 The hot gas is followed to enter the honeycomb duct mechanism;
step two, a filtering process, wherein the calcium oxide powder follows the CO 2 When passing through the filter element, the filter element will oxidize calcium when in the filter zoneFiltering the powder;
step three, a cleaning procedure, namely separating calcium oxide powder on the filter element from the filter element under the action of the hammering mechanism in the aggregate area and the discharge area, and conveying the calcium oxide powder to a discharge hole at the bottom of the calciner to finish collecting work;
and step four, a feeding procedure, namely, when hot gas flows in the honeycomb duct mechanism, quantitative control of the calcium carbonate powder entering the calciner can be realized through the intermittent feeding mechanism, and the step one is repeated.
The application has the beneficial effects that:
(1) In the application, the filter mechanism and the beating mechanism are arranged in the flow guiding pipe mechanism between the calciner and the cyclone preheater, so that the calcium oxide powder follows the CO 2 When the calcium oxide powder passes through the filter element, the calcium oxide powder can be separated from the filter element and conveyed to the discharge hole at the bottom of the calciner to finish the collection work under the action of the beating mechanism in the material collecting area and the discharging area, and therefore, the filter element in the filter area can keep a normal state during the work, thereby ensuring the CO 2 Can be smoothly discharged, and ensures the stable stability of the inside of the calciner; meanwhile, the beating mechanism breaks up hardened powder, so that the molding effect of the product is ensured, and the utilization of raw materials is also ensured;
(2) According to the application, the filter mechanism comprises the filter element, the separation assembly and the forming assembly, the separation assembly is used for separating the interior of the rotary tube into the filter area, the aggregate area and the discharge area, the forming assembly is used for forming a plurality of layers of folds on the filter element positioned in the filter area, so that the filter element designed by the layers of folds can filter more solid powder when hot air passes through the filter area, the filter area and the filter effect of the filter element are increased, and meanwhile, the filter element in the aggregate area is jacked into a semi-ellipsoidal shape under the drive of the support assembly in the beating mechanism, so that the solid powder at the upper half part of the filter element can be beaten and falls on the lower half part of the filter element when the beating mechanism is used for beating the filter element, and the solid powder at the lower half part of the filter element can be completely discharged when the filter element is matched with the beating mechanism again in the discharge area, and the separation effect of the solid powder on the filter element is improved;
(3) According to the application, the beating mechanism comprises the supporting component, the transmission component and the beating component, when the beating mechanism works, the driving component can synchronously drive the supporting component and the beating component to work, on one hand, the supporting component can jack up the filtering piece, on the other hand, under the driving of the driving component, the supporting component can rotate when the supporting component plays the roles of supporting and jacking, solid powder is prevented from falling and accumulating on the supporting component, and the supporting component can drive the filtering piece to vibrate when rotating, so that the separation effect of the solid powder on the filtering piece is further improved; in addition, the driving assembly drives the beating assembly to finish beating work of the filter element through the transmission assembly, so that on one hand, the use of a power source is reduced, the production cost is saved, and on the other hand, the beating assembly is utilized to beat the filter element, and solid powder hardened on the filter element can be scattered, so that the forming effect of a product is improved;
(4) According to the application, the intermittent feeding mechanism is arranged between the discharging pipe and the flow guide pipe mechanism, and when hot air is conveyed along the flow guide pipe mechanism, on one hand, the hot air can heat the calcium carbonate powder in the cyclone preheater in the flow guide pipe mechanism, so that the reutilization of the hot air is realized, and on the other hand, when the hot air flows in the flow guide pipe mechanism, the quantitative control of the calcium carbonate powder entering the calciner can be realized through the intermittent feeding mechanism, so that when the hot air flowing out of the flow guide pipe mechanism is smoothly discharged, the calcium carbonate powder also quantitatively enters the calciner at fixed time, and when the hot air flowing out of the flow guide pipe mechanism is not smooth, the time interval of the calcium carbonate powder entering the calciner is increased, so that the automatic feeding work of the calcium carbonate powder is realized, and the problem that when the hot air is not smooth, the calcium carbonate powder is continuously added, so that the product forming effect is poor is solved, and an operator can conveniently recognize the working condition in the calciner.
In summary, the equipment has the advantages of stable reaction temperature in the control calciner, full participation of raw materials in calcination and thorough calcination of products, and is particularly suitable for the technical field of calcination of powdered lime.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a suspension calcination apparatus.
FIG. 2 is a schematic diagram of the structure of the calciner and cyclone preheater.
Fig. 3 is an enlarged schematic view at a in fig. 2.
Fig. 4 is a schematic view of the structure of the interior of the draft tube mechanism.
Fig. 5 is a schematic structural view of the filtering mechanism.
Fig. 6 is a schematic structural diagram of the flow guiding tube mechanism and the filtering mechanism.
Fig. 7 is a schematic diagram of the structure of the draft tube mechanism and the hammering mechanism.
Fig. 8 is a schematic structural view of the support assembly.
Fig. 9 is a schematic diagram of the structure of the hammering mechanism located in the material collecting area when it works.
Fig. 10 is a schematic diagram of the structure of the hammering mechanism located in the discharging area when it is operated.
FIG. 11 is a schematic cross-sectional view of the interior of the draft tube mechanism.
Fig. 12 is a schematic diagram of the structure of the hammering mechanism.
Fig. 13 is a side view of the hammering mechanism.
Fig. 14 is a rear view of the calciner and cyclone preheater.
Fig. 15 is an enlarged schematic view at B in fig. 14.
Fig. 16 is an enlarged schematic view at C in fig. 14.
Fig. 17 is a process flow diagram of a calcium carbonate suspension calcination control system.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-7, a high stability calcium carbonate suspension calcination system comprising:
the upper end of the calciner 1 is connected with a cyclone preheater 3 through a flow guide pipe mechanism 2, the lower end of the cyclone preheater 3 is connected with a feed inlet in the calciner 1 through a discharge pipe 31, the flow guide pipe mechanism 2 comprises a first fixed pipe 21 fixedly connected with the calciner 1, a second fixed pipe 22 connected with the cyclone preheater 3 and a rotating pipe 24 which is driven by a driving component 23 and is rotatably arranged between the first fixed pipe 21 and the second fixed pipe 22;
a filtering mechanism 4, wherein the filtering mechanism 4 is arranged inside the flow guiding pipe mechanism 2, the filtering mechanism 4 comprises a filtering piece 41 arranged inside the rotary pipe 24, a separating component 42 and a forming component 43, wherein the separating component 42 is arranged at two sides of the filtering piece 41 and is used for separating the inside of the rotary pipe 24 into a filtering area 241, a collecting area 242 and a discharging area 243;
the two groups of beating mechanisms 5 are respectively arranged in the material collecting area 242 and the material discharging area 243 and are respectively connected with the driving component 23 in a transmission way, and the beating mechanisms 5 comprise a supporting component 51 arranged in the honeycomb duct mechanism 2, a transmission component 52 connected with the driving component 23 and a beating component 53 matched with the transmission component 52;
during production, some solid powder enters the honeycomb duct mechanism 2 along with hot gas and is filtered by the filter element 41, and the filtered solid powder is scattered and separated from the filter element 41 under the action of the beating mechanism 5.
In the present embodiment, by providing the calciner 1, the cyclone preheater 3 (the cyclone preheater 3 is the last stage preheater in the cyclone preheating system), the draft tube mechanism 2, and providing the filtering mechanism 4 and the beating mechanism 5 in the draft tube mechanism 2, the calcium oxide powder follows the CO 2 When passing through the filter element 41, the calcium oxide powder will be separated from the filter element 41 by the filter element 41, and the filter element 41 in the filter area 241 will maintain the normal state due to the rotation of the filter element 41 in the guide pipe mechanism 2, and the calcium oxide powder on the filter element 41 will be separated from the filter element 41 and delivered to the discharge hole at the bottom of the calciner 1 to complete the collection operation due to the beating mechanism 5 in the material collecting area 242 and the discharge area 243, so that the filter element 41 in the filter area 241 will maintain the normal state during operation, thereby ensuring the CO 2 Can be smoothly discharged, and ensures the internal stability of the calciner 1; meanwhile, the beating mechanism 5 breaks up hardened powder, so that the molding effect of the product is ensured, and the utilization of raw materials is also ensured.
It should be noted that, the calciner 1 is further provided with a plurality of burners, and a hot blast stove for filling combustion-supporting gas into the calciner 1 is further provided at the outer side of the calciner 1, and the above structures are all in the prior art and are not described here again;
in this embodiment, the joints between the first fixed tube 21 and the rotating tube 24, and between the second fixed tube 22 and the rotating tube 24 all need to be provided with sealing elements to ensure tightness, and the sealing elements can be flexible graphite sealing rings, which can resist high temperature of 850 ℃ at most.
Further, as shown in fig. 2 to 3, the driving assembly 23 includes a first gear 231 disposed at an outer side of the rotation tube 24, a second gear 232 engaged with the first gear 231, and a first driving unit 233 driving the second gear 232 to rotate.
In this embodiment, when the first driving unit 233 is set to operate, the second gear 232 is driven to rotate and the first gear 231 is driven to rotate so as to drive the rotating tube 24 to rotate, so as to drive the internal filter 41 to rotate, wherein the radius ratio of the first gear 231 to the second gear 232 is not less than 10, so as to ensure that the rotating speed of the rotating tube 24 is not too fast, wherein it should be noted that the first driving unit 233 needs to be fixedly set on the outer side of the calciner 1 through a connecting bracket, the first driving unit 233 can be selected from a YE3 series three-phase asynchronous motor produced by taizhou constant current motor, and the motor has good high temperature resistance, and preferably, the first gear 231, the second gear 232 and other gears can also be made of high temperature resistant materials.
Further, as shown in fig. 4 to 7, the partition assembly 42 is disposed inside the filtering area 241, and includes a horizontal plate 421 disposed in the middle of the rotary tube 24, and a vertical plate 422 disposed at the lower end of the horizontal plate 421, where the horizontal plate 421 and the vertical plate 422 are respectively provided with a first baffle 423 and a second baffle 424 at positions corresponding to the collecting area 242 and the discharging area 243, where the first baffle 423 and the second baffle 424 are disposed in a staggered manner, and a gap for the filter 41 to pass through is left between the first baffle 423 and the second baffle 424.
In this embodiment, the separation assembly 42 divides the interior of the rotary tube 24 into the filtering area 241, the collecting area 242 and the discharging area 243, so that the solid powder can be synchronously separated and discharged in the collecting area 242 and the discharging area 243 while the filtering piece 41 filters the solid powder.
In detail, the horizontal plates 421 are horizontally disposed in the middle of the rotary tube 24, and the horizontal plates 421 are provided with two plates 421, which are disposed on both sides of the filter 41, and the end portions of both sides of the two plates 421 are provided with sealing baffles 425, co 2 The filter element 41 is blocked by a sealing baffle 425 and flows along the upper end of the horizontal plate 421 after passing through the filter element 41, then enters the second fixed tube 22 and enters the cyclone preheater 3, meanwhile, a vertical plate 422 is vertically arranged in the middle of the lower end of the horizontal plate 421, the vertical plate 422 can divide the lower half area of the rotary tube 24 into an aggregate area 242 and a discharge area 243, the filter element 41 can be completely cleaned by arranging a beating mechanism 5 in the aggregate area 242 and the discharge area 243 respectively, and a first baffle 423 and a second baffle 424 are arranged between the horizontal plate 421 and the vertical plate 422, one of the purposes of arranging the first baffle 423 and the second baffle 424 is that when solid powder is scattered and separated in the aggregate area 242, the solid powder can be ensured to fall on the filter element 41 completely, so that the subsequent discharge treatment work is facilitated, and on the other hand, the first baffle 423 and the second baffle 424 are arrangedA baffle 423 and a second baffle 424 may also provide support for the support assembly 51.
Further, as shown in fig. 5, the molding assembly 43 is configured to form the filter element 41 into a plurality of layers of folds, and includes a plurality of limiting plates 431 arranged in an array along the circumferential direction of the rotating tube 24, and configured to form the filter element 41 into a plurality of layers of folds, wherein both sides of the filter element 41 are provided with the limiting plates 431.
In this embodiment, the forming assembly 43 is used for forming multiple layers of folds on the filter element 41 located in the filtering area 241, so that the filter element 41 with multiple layers of folds can filter more solid powder when hot air passes through the filtering area 241, thereby increasing the filtering area and filtering effect of the filter element 41, and meanwhile, when the filter element 41 enters the inside of the collecting area 242 and the discharging area 243, the filter element 41 is propped up to be semi-ellipsoidal, thereby facilitating the collection and discharge of the solid powder and avoiding the random dispersion of the solid powder inside the rotating tube 24.
In detail, in the process that the filter member 41 rotates along with the rotation tube 24, when the filter member 41 is transferred from the discharge area 243 to the filtering area 241, the filter member 41 may enter between two sets of the limiting plates 431 and form a plurality of wrinkles, wherein the limiting plates 431 disposed at both sides of the filter member 41 have the same structure and are fixedly disposed on the horizontal plates 421, respectively.
Note that, there is no gap between the limiting plate 431 close to the horizontal plate 421 and the horizontal plate 421 to prevent CO 2 Through the gaps into the material collecting area 242 and the material discharging area 243, the limiting plate 431 is in a wave shape matched with the multi-layer folds.
Further, as shown in fig. 6 to 8, the support assembly 51 includes a first rotating lever 511 drivingly disposed with the second gear 232 and rotatably disposed on the first shutter 423 or the second shutter 424, a first cam 512 connected with the first rotating lever 511, a second rotating lever 513 connected with the first cam 512, and a support boss 514 connected with the second rotating lever 513.
In this embodiment, by arranging the supporting component 51 to cooperate with the separating component 42, the filter element 41 located in the collecting area 242 is jacked into a semi-ellipsoid shape under the driving of the supporting component 51, when the second gear 232 rotates, the second gear 232 synchronously drives the first rotating rod 511 to rotate through the connecting belt, the first rotating rod rotates and then drives the first cam 512 to rotate, and the first cam 512 synchronously drives the supporting convex plate 514 to rotate through the second rotating rod 513, so that the supporting convex plate 514 supports and jacks the filter element 41 and simultaneously slightly rotates to prevent solid powder from falling and accumulating on the second rotating rod 513 (the supporting convex plate 514 is in a partial sphere shape, when the supporting convex plate 514 jacks the filter element 41, the filter element 41 is attached to the supporting convex plate 514, and therefore, the solid powder cannot fall on the supporting convex plate 514), and the supporting component 51 also drives the filter element 41 to vibrate when rotating, so that the separation effect of the solid powder on the filter element 41 is further improved;
in this way, when the beating mechanism 5 performs beating operation on the filter 41, the solid powder on the upper half part of the filter 41 will be beaten down and fall on the lower half part of the filter 41, and when the discharging area 243 is matched with the beating mechanism 5 again, the solid powder on the lower half part of the filter 41 can be completely discharged, so that the separation effect of the solid powder on the filter 41 is improved.
Further, as shown in fig. 7 to 13, the transmission assembly 52 includes a reduction unit 521 drivingly disposed with the second gear 232, a first bevel gear 522 engaged with the reduction unit 521, and a second bevel gear 523 engaged with the first bevel gear 522.
The hammering assembly 53 includes:
a support member 531, wherein the support member 531 is connected to the horizontal plate 421, and the support member 531 includes an upper support plate 5311 and a lower support plate 5312 fixedly disposed with each other;
a first rotating member 532, wherein the first rotating member 532 includes a rotating shaft 5321 disposed between the upper support plate 5311 and the lower support plate 5312, a plurality of second cams 5322 disposed in an array along an axial direction of the rotating shaft 5321, and a control wheel 5323 disposed outside the rotating shaft 5321, and the control wheel 5323 is in driving connection with the second bevel gear 523 through a connection belt;
a second rotating member 533, where the second rotating member 533 and the second cam 5322 in the first rotating member 532 are disposed offset from each other;
and a hammering member 534, wherein the hammering member 534 comprises a hammering rod 5341 penetrating through the lower supporting plate 5312 and abutting against the second cam 5322, a buffer spring 5342 arranged at the lower end of the lower supporting plate 5312 and connected with the hammering rod 5341, and a hammering head 5343 arranged at the lower end of the hammering rod 5341.
In this embodiment, through setting up drive assembly 52, drive assembly 23 can drive through drive assembly 52 and beat subassembly 53 and accomplish the work of beating to filter 41, on the one hand, reduced the use of power supply, saved manufacturing cost, on the other hand, utilize beat subassembly 53 to beat work to filter 41, also can break up the solid powder that takes place the hardening on the filter 41 to improve the shaping effect of product.
In detail, the second gear 232 rotates to drive the first bevel gear 522 through the reduction unit 521, the first bevel gear 522 drives the second bevel gear 523 to rotate and drives the plurality of control wheels 5323 to rotate simultaneously through the connecting belt, the rotating wheels drive the rotating shaft 5321 to rotate and drive the plurality of second cams 5322 to rotate simultaneously, the second cams 5322 drive the lower end beating rod 5341 to move when rotating, the beating rod 5341 drives the hammer head to reciprocate and complete the beating work of the filter 41 under the cooperation of the second cams 5322 and the buffer springs 5342, and in order to ensure the beating effect, the second cams 5322 on two adjacent rotating shafts 5321 are reversely arranged and staggered, so that the second cams 5322 on different rotating shafts 5321 beat the filter 41 at intervals, thereby ensuring the separation work between the solid powder and the filter 41.
It should be noted that, the upper support plate 5311 and the lower support plate 5312 are fixedly connected with each other through a plurality of side plates 5313, and the speed reduction unit 521 is formed by matching a plurality of large gears and small gears, which is not described in detail in the prior art;
further, the mounting positions of the plurality of second cams 5322 on the first rotating member 532 and the second rotating member 533 are not limited to those shown in the drawings;
meanwhile, the beating member 53 provided inside the discharging region 243 does not interfere with the supporting member 51 (for ease of understanding, the beating member 53 is shown to be higher than the beating member 53 in practice);
the first bevel gear 522, the second bevel gear 523, and the hammering unit 53 are provided inside the draft tube mechanism 2, and for convenience of understanding, the above-described components are provided outside the draft tube mechanism 2 in some drawings.
Further, as shown in fig. 2-4, the rotary pipe 24 is further provided with a material guiding pipe 244 at a position corresponding to the material discharging area 243, and the material guiding pipe 244 is communicated with a material outlet at the bottom of the calciner 1.
It should be noted that, by providing the material guiding pipe 244 at the lower end of the material discharging area 243, the solid powder falling from the filtering element 41 will fall into the material guiding pipe 244 and be transported to the material outlet at the bottom of the calciner 1 along the material guiding pipe 244, and the air blowing element is further provided in the material guiding pipe 244 to quickly blow the solid powder to the bottom of the calciner 1, so that the solid powder entering the material guiding pipe 244 can be quickly thrown to the material outlet at the bottom of the calciner 1, and the solid powder and the calcium oxide powder coming out from the bottom of the calciner 1 can complete the mixed material discharging operation.
Example two
As shown in fig. 14 to 16, in which the same or corresponding parts as those in the first embodiment are denoted by the corresponding reference numerals as in the first embodiment, only the points of distinction from the first embodiment will be described below for the sake of brevity. The second embodiment is different from the first embodiment in that:
further, the discharging pipe 31 is further provided therein with an intermittent feeding mechanism 6 for controlling the intermittent feeding of the calcium carbonate powder into the calciner 1, which comprises a rotating wheel 61 rotatably provided in the second fixed pipe 22 and driven by hot air, an incomplete gear 62 connected with the rotating wheel 61 and provided outside the discharging pipe 31, a driving gear 63 engaged with the incomplete gear 62, and a feeding baffle 64 connected with the driving gear 63 and rotatably provided in the discharging pipe 31.
It should be noted that, through setting up intermittent feeding mechanism 6 between discharging pipe 31 and honeycomb duct mechanism 2, when the steam is carried along honeycomb duct mechanism 2, on the one hand, the steam can be in the inside heating of honeycomb duct mechanism 2 is located the calcium carbonate powder in cyclone preheater 3, thereby realize the reuse of steam, on the other hand, when the steam flows in honeycomb duct mechanism 2, can realize the quantitative control to getting into the inside calcium carbonate powder of calciner 1 through intermittent feeding mechanism 6, therefore, when the steam that flows out from honeycomb duct mechanism 2 inside discharges smoothly, the inside of calciner 1 also can be quantitative, regularly get into to the calcium carbonate powder, when the steam that flows out from honeycomb duct mechanism 2 inside discharges unsmoothly, the time interval that the inside of calcium carbonate powder got into calciner 1 can be increased, thereby realized the automated feeding work of calcium carbonate powder, avoid because of the steam discharges unsmoothly when, the calcium carbonate powder still continuously adds, result in the product shaping effect is poor, consequently, the inside operating personnel discernment calciner 1's of being convenient for.
In detail, the rotating wheel 61 is provided with a plurality of blades, and an air deflector is disposed in the second fixed tube 22, so that hot air only blows to the upper half end or the lower half end of the rotating wheel 61 to ensure smooth rotation of the rotating wheel 61, meanwhile, when the hot air drives the rotating wheel 61 to rotate, the rotating shaft of the rotating wheel 61 extending out of the second fixed tube 22 drives the incomplete gear 62 to rotate (the incomplete gear 62 can be driven by a pair of bevel gear pairs in cooperation with a connecting belt, which is a common technical means and is not described in detail), the incomplete gear 62 intermittently drives the driving gear 63 to rotate in the rotation process, and after the incomplete gear 62 and the driving gear 63 are contacted, the driving gear 63 drives the feeding baffle 64 to rotate 180 degrees, and the feeding baffle 64 pushes calcium carbonate powder at the rear end of the feeding baffle to the inside of the calciner 1 to complete calcination.
Example III
As shown in fig. 17, a method for producing a high-stability calcium carbonate suspension calcination system includes the steps of:
step one, a calcination step, in which calcium carbonate powder is fed into a calciner 1, and is heated by a burner and a hot blast stove to produce calcium oxide and CO from calcium carbonate 2 ，CO 2 The hot gas is followed to enter the honeycomb duct mechanism 2;
step two, a filtering process, wherein the calcium oxide powder follows the CO 2 When passing through the filter 41, the filter 41 filters the calcium oxide powder in the filtering area 241;
step three, a cleaning procedure, in which calcium oxide powder on the filter element 41 is separated from the filter element 41 and conveyed to a discharge hole at the bottom of the calciner 1 to finish collection under the action of the beating mechanism 5 when the material collecting area 242 and the material discharging area 243 are used;
and step four, a feeding procedure, namely, when hot gas flows in the honeycomb duct mechanism 2, quantitative control of the calcium carbonate powder entering the calciner 1 can be realized through the intermittent feeding mechanism 6, and the step one is repeated.
In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "front and rear", "left and right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or component in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the application.
Of course, in this disclosure, those skilled in the art will understand that the term "a" or "an" is to be interpreted as "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, and in another embodiment, the number of elements may be multiple, and the term "a" is not to be construed as limiting the number.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art under the technical teaching of the present application should be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (10)
1. A high stability calcium carbonate suspension calcination system, comprising:
the upper end of the calciner is connected with a cyclone preheater through a flow guide pipe mechanism, the lower end of the cyclone preheater is connected with a feed inlet in the calciner through a discharge pipe, and the flow guide pipe mechanism comprises a first fixed pipe fixedly connected with the calciner, a second fixed pipe connected with the cyclone preheater and a rotating pipe which is driven by a driving assembly and is rotatably arranged between the first fixed pipe and the second fixed pipe;
the filtering mechanism is arranged in the honeycomb duct mechanism and comprises a filtering piece arranged in the rotary pipe, a separation component and a forming component, wherein the separation component is arranged on two sides of the filtering piece and is used for separating the interior of the rotary pipe into a filtering area, a collecting area and a discharging area;
the two groups of beating mechanisms are respectively arranged in the material collecting area and the material discharging area and are respectively connected with the driving component in a transmission way, and each beating mechanism comprises a supporting component arranged in the honeycomb duct mechanism, a transmission component connected with the driving component and a beating component matched with the transmission component;
during production, some solid powder enters the honeycomb duct mechanism along with hot gas and is filtered by the filter element, and the filtered solid powder can be scattered and separated from the filter element under the action of the beating mechanism.
2. The high stability calcium carbonate suspension calcination system according to claim 1, wherein the driving assembly comprises a first gear disposed outside the rotation tube, a second gear engaged with the first gear, and a first driving unit driving the second gear to rotate.
3. The high-stability calcium carbonate suspension calcination system according to claim 1, wherein the separation component is arranged in the filtration zone and comprises a horizontal plate arranged in the middle of the rotation pipe and a vertical plate arranged at the lower end of the horizontal plate, the horizontal plate and the vertical plate are respectively provided with a first baffle and a second baffle at positions corresponding to the material collection zone and the material discharge zone, the first baffle and the second baffle are arranged in a staggered manner, and a gap for the passage of the filtration piece is reserved between the first baffle and the second baffle.
4. A high stability calcium carbonate suspension calcination system according to claim 3, wherein the forming assembly is used for forming the filter element into a plurality of layers of folds, and the forming assembly comprises a plurality of limiting plates which are arranged along the circumferential direction of the rotating tube and can form the filter element into a plurality of layers of folds, and the limiting plates are arranged on two sides of the filter element.
5. A high stability calcium carbonate suspension calcination system according to claim 3, wherein the support assembly comprises a first rotating rod rotatably disposed on either the first or second baffle, a first cam connected to the first rotating rod, a second rotating rod connected to the first cam, and a support boss connected to the second rotating rod.
6. The high stability calcium carbonate suspension calcination system according to claim 5, wherein the transmission assembly comprises a reduction unit in driving arrangement with the second gear, a first bevel gear in cooperation with the reduction unit, and a second bevel gear in cooperation with the first bevel gear.
7. The high stability calcium carbonate suspension calcination system according to claim 6, wherein the beating assembly comprises:
the support piece is connected with the middle plate and comprises an upper support plate and a lower support plate which are fixedly arranged with each other;
the first rotating piece comprises a rotating shaft arranged between the upper supporting plate and the lower supporting plate, a plurality of second cams arranged in an array along the axis direction of the rotating shaft and a control wheel arranged outside the rotating shaft, and the control wheel is in transmission connection with the second bevel gear through a connecting belt;
the second rotating piece and the second cam in the first rotating piece are arranged in a staggered manner;
the beating part comprises a beating rod penetrating through the lower supporting plate and being in butt joint with the second cam, a buffer spring arranged at the lower end of the lower supporting plate and connected with the beating rod, and a beating head arranged at the lower end of the beating rod.
8. The high stability calcium carbonate suspension calcination system according to claim 1, wherein the rotary pipe is further provided with a material guiding pipe at a position corresponding to the material discharging area, and the material guiding pipe is communicated with a material discharging hole at the bottom of the calciner.
9. The high-stability calcium carbonate suspension calcination system according to claim 1, wherein the discharge pipe is further provided with an intermittent feeding mechanism for controlling the intermittent feeding of calcium carbonate powder into the calciner, and the intermittent feeding mechanism comprises a rotating wheel rotatably arranged in the second fixed pipe and driven by hot air, an incomplete gear connected with the rotating wheel and arranged on the outer side of the discharge pipe, a driving gear matched with the incomplete gear, and a feeding baffle rotatably connected with the driving gear and arranged in the discharge pipe.
10. A method of producing a calcination system according to any one of claims 1 to 9, comprising the steps of:
step one, a calcination step, in which calcium carbonate powder is fed into a calciner, and is heated by a burner and a hot blast stove, so that calcium oxide and CO are produced from calcium carbonate 2 ，CO 2 The hot gas is followed to enter the honeycomb duct mechanism;
step two, a filtering process, wherein the calcium oxide powder follows the CO 2 When passing through the filter element, the filter element filters the calcium oxide powder in the filter area;
step three, a cleaning procedure, namely separating calcium oxide powder on the filter element from the filter element under the action of the hammering mechanism in the aggregate area and the discharge area, and conveying the calcium oxide powder to a discharge hole at the bottom of the calciner to finish collecting work;
and step four, a feeding procedure, namely, when hot gas flows in the honeycomb duct mechanism, quantitative control of the calcium carbonate powder entering the calciner can be realized through the intermittent feeding mechanism, and the step one is repeated.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3925474A1 (en) * | 1989-08-01 | 1991-02-07 | Krupp Polysius Ag | Roasting fine grained limestone to produce roasted lime - by hot compacting roasted fine grains before tempering to complete roasting |
| CN211111743U (en) * | 2019-11-20 | 2020-07-28 | 张家界荣丰新材料有限公司 | Lime calcining kiln with tail gas purification system |
| CN216191947U (en) * | 2021-08-30 | 2022-04-05 | 洛阳千百度窑炉科技有限公司 | Environment-friendly shaft kiln feeding mechanism |
| CN115124063A (en) * | 2022-07-26 | 2022-09-30 | 济南晨兴钙业有限公司 | Calcium carbonate preparation process |
-
2023
- 2023-09-04 CN CN202311128628.5A patent/CN117049800B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3925474A1 (en) * | 1989-08-01 | 1991-02-07 | Krupp Polysius Ag | Roasting fine grained limestone to produce roasted lime - by hot compacting roasted fine grains before tempering to complete roasting |
| CN211111743U (en) * | 2019-11-20 | 2020-07-28 | 张家界荣丰新材料有限公司 | Lime calcining kiln with tail gas purification system |
| CN216191947U (en) * | 2021-08-30 | 2022-04-05 | 洛阳千百度窑炉科技有限公司 | Environment-friendly shaft kiln feeding mechanism |
| CN115124063A (en) * | 2022-07-26 | 2022-09-30 | 济南晨兴钙业有限公司 | Calcium carbonate preparation process |
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