CN115338043B - High-efficiency superfine calcium carbonate slurry centrifugal dehydration process and dehydrator - Google Patents
High-efficiency superfine calcium carbonate slurry centrifugal dehydration process and dehydrator Download PDFInfo
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- CN115338043B CN115338043B CN202211072035.7A CN202211072035A CN115338043B CN 115338043 B CN115338043 B CN 115338043B CN 202211072035 A CN202211072035 A CN 202211072035A CN 115338043 B CN115338043 B CN 115338043B
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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 90
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 44
- 239000002002 slurry Substances 0.000 title claims abstract description 33
- 230000018044 dehydration Effects 0.000 title abstract description 14
- 238000006297 dehydration reaction Methods 0.000 title abstract description 14
- 238000000034 method Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 24
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 17
- 238000007599 discharging Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- -1 glaze Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
- B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
- B04B2001/205—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with special construction of screw thread, e.g. segments, height
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Centrifugal Separators (AREA)
Abstract
The invention discloses a high-efficiency superfine calcium carbonate slurry centrifugal dehydration process and a dehydrator, which utilize centrifugal force to realize solid-liquid separation of slurry in the radial direction to form a solid layer (18) with calcium carbonate as the main component at the outer side and a liquid layer (19) with liquid water as the main component at the inner side, provide power for advancing in one direction for the solid layer (18), provide power for advancing in the opposite direction for the liquid layer (19), separate the solid layer (18) from the liquid layer (19), and realize dehydration; the power of the advancing of the solid layer (18) and the power of the slurry for realizing solid-liquid separation are generated by the same driving mechanism. The invention has the advantages of high dehydration efficiency and simple structure.
Description
Technical Field
The invention belongs to the field of superfine calcium carbonate production equipment, and particularly relates to a high-efficiency superfine calcium carbonate slurry centrifugal dehydration process and a dehydrator.
Background
The superfine calcium carbonate refers to calcium carbonate with the average particle diameter of 0.02 mu m < d less than or equal to 0.1 mu m, and can be widely applied to electric wires, leather cloth, molded products, hard tubes, special-shaped extrusion, floor tiles, films, EVA sponge in the plastic industry, powder coatings, synthetic resins, glaze, oil paint, emulsion paint, primary paint in the paint industry, shoes in the rubber industry, electric wires and cables, tires, sponge, colloid paste, rubber lining cloth, belt (610) hoses, paper making, industrial coating, filling, fuel color agents, toothpaste, cosmetics, food additives, acid neutralizers and the like.
The existing production process of superfine calcium carbonate comprises the following sequential steps of screening limestone from raw materials, calcining the limestone into calcium oxide, slaking the calcium oxide into calcium hydroxide in a water tank, introducing carbon dioxide into the calcium hydroxide to generate calcium carbonate precipitate, namely calcium carbonate slurry, dehydrating, drying, depolymerizing and activating the calcium carbonate precipitate to obtain a finished product.
The existing calcium carbonate precipitation dehydration adopts a centrifugal dehydrator, the structure of the dehydrator comprises a roller, a hollow rotating shaft is arranged in the roller, a spiral plate is arranged on the outer side of the rotating shaft, the inner peripheral surface of the spiral plate is directly fixed with the outer peripheral surface of the rotating shaft, driving mechanisms are arranged on the roller and the rotating shaft, the rotation directions of the roller and the rotating shaft are opposite, calcium carbonate precipitation is introduced from one end of the rotating shaft and discharged from the middle of the rotating shaft, solid and liquid are separated under huge centrifugal force generated by opposite rotation of the roller and the rotating shaft, a solid part is pushed by the spiral plate to move along the inner wall of the roller and is discharged from one end of the roller, and water is discharged from the middle of the roller. A more specific description is described on the chemical instrumentation network, the detailed website https:// www.chem17.com/tech_news/detail/2444137.Html. The solid calcium carbonate is pushed out by the spiral plate and simultaneously pushes out a part of water, so that the water content of the dehydrated calcium carbonate is still high, about 40%, the dehydration efficiency is low, the energy consumption required by subsequent drying is high, and the production cost of the finished product is high. In addition, the existing dehydrator adopts two sets of driving mechanisms, is complex in structure, leads to equipment failure easily and is high in cost.
Therefore, the existing dehydrator has the defects of lower dehydration efficiency and more complex structure.
Disclosure of Invention
The invention aims to provide a centrifugal dehydration process and a dehydrator for high-efficiency superfine calcium carbonate slurry. The invention has the advantages of high dehydration efficiency and simple structure.
The technical scheme of the invention is as follows: a centrifugal dewatering process for high-efficiency superfine calcium carbonate slurry features that the slurry is radially separated to form a solid layer whose main component is calcium carbonate and a liquid layer whose main component is liquid water.
In the centrifugal dehydration process of the high-efficiency superfine calcium carbonate slurry, the advancing power of the solid layer and the power of the slurry for realizing solid-liquid separation are generated by the same driving mechanism.
The utility model provides a high-efficient superfine calcium carbonate thick liquids centrifugal dehydrator, including sealed shell, the outside of shell is equipped with the motor, the output of motor is equipped with first action wheel and second action wheel, the inboard of shell is equipped with confined cylinder, the one end of cylinder is equipped with first delivery port, the other end of cylinder is equipped with first discharge gate, be equipped with the pivot in the cylinder, the outside of pivot is equipped with helical first gusset, first gusset and the inner wall laminating of cylinder, the cylinder is all stretched out at the both ends of pivot, the one end of pivot is equipped with the runner, the export of runner is located the middle part of pivot, the other end and the shell rotation of pivot are connected, the outside of pivot other end is equipped with first follower, first follower passes through first belt and connects first action wheel, one side of first follower is equipped with the axle sleeve fixed with the cylinder, be equipped with the second follower on the axle sleeve, the second follower passes through the second belt and connects the second action wheel.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, the first rib plate is fixed with the rotating shaft through the connecting rods, a second rib plate which is spiral is arranged on the inner side of the first rib plate, the second rib plate is fixed with the rotating shaft, and the rotation direction of the second rib plate is opposite to that of the first rib plate.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, the slurry is subjected to solid-liquid separation in the roller to form a solid layer, and the front part of the first rib plate is positioned in the solid layer.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, the slurry is subjected to solid-liquid separation in the roller to form a liquid layer, and the second rib plate is positioned in the liquid layer.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, the rotating shaft is provided with a rotating joint communicated with the runner, and the rotating joint is provided with a feeding pipe penetrating through the shell; the bottom of the shell is provided with a second water outlet and a second discharge hole, the second water outlet is positioned below the first water outlet, the second discharge hole is positioned below the first discharge hole, the inner bottom surface of the shell is provided with a baffle plate, and the baffle plate is positioned between the second water outlet and the second discharge hole.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, one end of the rotating shaft is provided with a first bearing, the first bearing is connected with the shell through a first support, the other end of the rotating shaft is connected with the shell through a second support, one end of the roller is provided with a third bearing connected with the first support, the other end of the roller is provided with a fourth bearing, and the fourth bearing is connected with the shell through a second support.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, the roller comprises a separation section, a squeezing section and a homogenizing section, wherein the separation section and the homogenizing section are both round tubes, the diameter of the separation section is larger than that of the homogenizing section, and the squeezing section is cone-shaped; the first water outlet is positioned on the end face of the roller close to the separation section, and the first discharge outlet is positioned on the homogenizing section.
In the high-efficiency superfine calcium carbonate slurry centrifugal dehydrator, one end of the first rib plate is close to the first water outlet, the other end of the first rib plate extends into the homogenizing section, and the inner hole of the first rib plate positioned in the homogenizing section is attached to the rotating shaft; one end of the second rib plate is close to the outlet of the runner, and the other end of the second rib plate is positioned in the squeezing section.
Compared with the prior art, the invention adopts one motor to drive the roller and the rotating shaft to rotate simultaneously, and different rotating speeds exist between the roller and the rotating shaft by controlling the diameters of the driving wheel and the driven wheel, so that the axial reverse movement of dehydrated calcium carbonate and dehydrated water is smoothly ensured, the solid-liquid separation is realized, the structure is simpler, and the equipment is not easy to fail. The rotary shaft is provided with the large and small spiral rib plates, the rib plates at the outer side are used for pushing calcium carbonate to be discharged, and as the front parts of the rib plates at the outer side are positioned in the solid layer, the rib plates at the outer side only push the calcium carbonate in the solid layer into the pressing section to press, so that the water content of the calcium carbonate before pressing is reduced, and the water content of a finished product can be reduced. Because the rotation directions of the two rib plates are opposite, the feeding direction of the outer rib plate is opposite to the feeding direction of the inner rib plate, and the inner rib plate is arranged at the inner side of the squeezing section, namely near the rotating shaft side, a low-pressure area is formed, so that the water in the squeezing section is promoted to be discharged, the calcium carbonate in the squeezing section is further dried, the water content of a finished product is reduced, the water content can be reduced to 31.7%, the dehydration efficiency is high, the subsequent drying energy consumption is reduced, and the production cost is reduced. Therefore, the invention has the advantages of high dehydration efficiency and simple structure.
Drawings
Fig. 1 is a front view of a centrifugal dehydrator.
Fig. 2 is a schematic cross-sectional view of a spindle.
The marks in the drawings are: the device comprises a shell, a motor, a first driving wheel 3, a second driving wheel 4, a roller 5, a first water outlet 6, a first discharge port 7, a rotary shaft 8, a first rib plate 9, a first runner 10, a first driven wheel 11, a first belt 12, a first shaft sleeve 13, a second driven wheel 14, a second belt 15, a second connecting rod 16, a second rib plate 17, a solid layer 18, a liquid layer 19, a rotary joint 20, a feeding pipe 21, a second water outlet 22, a second discharge port 23, a second discharge port 24, a partition plate 25, a first bearing 26, a first bracket 27, a second bearing 28, a third bearing 29, a fourth bearing 30, a second bracket 31, a pressing section 32 and a homogenizing section 33.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. A centrifugal dewatering process for high-efficiency superfine calcium carbonate slurry features that the slurry is radially separated from solid layer 18 whose main component is calcium carbonate and liquid layer 19 whose main component is liquid water are formed by centrifugal force, and the power for advancing in one direction is supplied to solid layer 18 and the power for advancing in opposite direction is supplied to liquid layer 19 to separate solid layer 18 from liquid layer 19.
The power of the advancing solid layer 18 and the power of the slurry to achieve solid-liquid separation are generated by the same drive mechanism.
The utility model provides a high-efficient superfine calcium carbonate thick liquids centrifugal dehydrator, as shown in fig. 1, including sealed shell 1, the outside of shell 1 is equipped with motor 2, the output of motor 2 is equipped with first action wheel 3 and second action wheel 4, the inboard of shell 1 is equipped with confined cylinder 5, the one end of cylinder 5 is equipped with first delivery port 6, the other end of cylinder 5 is equipped with first discharge gate 7, be equipped with pivot 8 in the cylinder 5, the outside of pivot 8 is equipped with spiral first gusset 9, first gusset 9 is laminated with the inner wall of cylinder 5, the both ends of pivot 8 all stretch out cylinder 5, the one end of pivot 8 is equipped with runner 10, the export of runner 10 is located the middle part of pivot 8, the other end of pivot 8 is connected with shell 1 rotation, the outside of pivot 8 other end is equipped with first follower 11, first follower 11 is connected first action wheel 3 through first belt 12, one side of first follower 11 is equipped with the axle sleeve 13 fixed with cylinder 5, axle sleeve 13 is connected with shell 1 rotation, be equipped with second follower 14 on axle sleeve 13, second follower 14 is connected second follower 4 through second belt 15.
The first rib plate 9 is fixed with the rotating shaft 8 through a plurality of connecting rods 16, a second rib plate 17 which is spiral with the first rib plate 9 is arranged on the inner side of the first rib plate 9, the second rib plate 17 is fixed with the rotating shaft 8, and the rotation directions of the second rib plate 17 and the first rib plate 9 are opposite. The feeding area of any one section of the second rib plate 17 is smaller than the feeding area of any one section of the first rib plate 9.
The slurry is subjected to solid-liquid separation in the roller 5 to form a solid layer 18, and the front part of the first rib plate 9 is positioned inside the solid layer 18. The front part of the first rib plate 9 is the first rib plate 9 positioned between the outlet of the runner 10 and the first discharging hole 7.
The slurry is subjected to solid-liquid separation in the roller 5 to form a liquid layer 19, and the second rib plate 17 is positioned in the liquid layer 19.
The rotary joint 20 communicated with the runner 10 is arranged on the rotary shaft 8, and a feed pipe 21 penetrating through the shell 1 is arranged on the rotary joint 20; the bottom of the shell 1 is provided with a second water outlet 22 and a second discharge outlet 23, the second water outlet 22 is positioned below the first water outlet 6, the second discharge outlet 23 is positioned below the first discharge outlet 7, the inner bottom surface of the shell 1 is provided with a baffle 24, and the baffle 24 is positioned between the second water outlet 22 and the second discharge outlet 23.
One end of the rotating shaft 8 is provided with a first bearing 25, the first bearing 25 is connected with the shell 1 through a first bracket 26, the other end of the rotating shaft 8 is connected with the shell 1 through a second bracket 27, one end of the roller 5 is provided with a third bearing 28 connected with the first bracket 26, the other end of the roller 5 is provided with a fourth bearing 29, and the fourth bearing 29 is connected with the shell 1 through a second bracket 30.
The roller 5 comprises a separation section 31, a squeezing section 32 and a homogenizing section 33, wherein the separation section 31 and the homogenizing section 33 are all round tubes, the diameter of the separation section 31 is larger than that of the homogenizing section 33, and the squeezing section 32 is conical; the first water outlet 6 is positioned on the end surface of the roller 5 close to the separation section 31, and the first discharge outlet 7 is positioned on the homogenizing section 33.
One end of the first rib plate 9 is close to the first water outlet 6, the other end of the first rib plate 9 extends into the homogenizing section 33, and an inner hole of the first rib plate 9 positioned in the homogenizing section 33 is attached to the rotating shaft 8; one end of the second rib plate 17 is close to the outlet of the runner 10, and the other end of the second rib plate 17 is located in the pressing section 32. The second rib plate 17 is far away from the first water outlet 6, so that the slurry discharged from the flow channel 10 is prevented from being completely sent out of the first water outlet 6 without centrifugal force separation, the low content of calcium carbonate in discharged water is ensured, and the utilization rate is improved.
The speed ratio between the first driving wheel 3 and the first driven wheel 11 is A, the speed ratio between the second driving wheel 4 and the second driven wheel 14 is B, and A is not equal to B, so that a rotating speed difference exists between the roller 5 and the rotating shaft 8. Preferably, the rotation speed of the rotation shaft 8 is 15 revolutions per minute faster than the rotation speed of the drum 5.
Table 1 below shows the water content of the dehydrated product obtained at different rotational speeds of the rotary shaft 8 at 1800 rpm of the rotational speed of the drum 5.
TABLE 1
As can be seen from table 1, as the speed difference between the shaft 8 and the drum 5 is greater, the water content of the dehydrated product is higher, which may be caused by how much radial disturbance is generated by the first web 9 to the solid layer 18, resulting in a portion of the calcium carbonate being detached from the solid layer 18 and a portion of the water in the corresponding liquid layer 19 being replenished into the solid layer 18. When the speed difference is less than 15 revolutions per minute, the water content of the dehydrated product is not reduced, but after the continuous shrinkage, the discharge speed of the dehydrated product is too slow until the dehydrated product is not discharged, and when the rotating speed of the rotating shaft 8 is faster than the rotating speed of the roller 5 by 15 revolutions per minute, the dehydrated product with low water content can be obtained, and the smooth discharge of the dehydrated product can be maintained.
Working principle: the feed pipe 21 is connected to a water pump which pumps the slurry into the shaft 8 and into the drum 5 through the flow path 10. The motor 2 drives the first driving wheel 3 and the second driving wheel 4 to synchronously rotate, the first driving wheel 3 drives the first driven wheel 11 to rotate through the first belt 12, the first driven wheel 11 drives the rotating shaft 8 to rotate, the second driving wheel 4 drives the second driven wheel 14 to rotate through the second belt 15, the second driven wheel 14 drives the roller 5 to rotate through the shaft sleeve 13, the roller 5 drives the slurry to rotate at a high speed, because the density of water and the density of calcium carbonate are different, the water moves inwards to be close to the rotating shaft 8 to form a liquid layer 19, and the calcium carbonate moves outwards to be close to the roller 5 to form a solid layer. The rotating shaft 8 drives the first rib plate 9 to rotate through the connecting rod 16, and due to the fact that the rotating speed difference exists between the rotating shaft 8 and the roller 5, relative rotation exists between the first rib plate 9 and the roller 5, the first rib plate 9 pushes the solid layer 18 to move towards the first discharging hole 7, after the solid layer enters the pressing section 32, pressure is generated in the calcium carbonate due to the fact that the area is reduced, more water is extruded, the extruded water moves leftwards, the roller 5 is discharged from the first water outlet 6, the shell 1 is discharged from the second water outlet 22, calcium carbonate is further extruded after entering the homogenizing section, the water content is lower, then the calcium carbonate is discharged from the roller 5 through the first discharging hole 7, and the shell 1 is discharged from the second discharging hole 23, so that a dehydrated product is obtained.
The water content of the dehydrated product was 31.7% by inspection.
Comparative example 1. On the basis of the embodiment 1, the second rib plate 17 and the connecting rod 16 are omitted, and the inner hole of the first rib plate 9 is reduced to be directly fixed on the rotating shaft 8, which is the structure of the rotating shaft and the spiral plate fixed on the rotating shaft in the prior art. The water content of the dehydrated product was found to be 38.5%.
Comparative example 2. The homogenization section 33 was eliminated on the basis of example 1. The water content of the dehydrated product was 34.1% by examination. The homogenizing section 33 is mainly used for keeping the pressure in the squeezing section 32 constant, avoiding being influenced by the throwing force of the first discharging hole 7, and keeping the length of the homogenizing section 33 above 20cm, so as to keep the water extrusion of the squeezing section 32 stable, and further reduce the water content of the dehydrated product. The length of the homogenizing segment 33 preferably does not exceed 30cm, and after exceeding 30cm, the homogenizing segment has no better positive effect, increases the rejection resistance and increases the energy consumption.
Claims (3)
1. A high-efficient superfine calcium carbonate thick liquids centrifugal dehydrator, its characterized in that: including sealed shell (1), the outside of shell (1) is equipped with motor (2), the output of motor (2) is equipped with first action wheel (3) and second action wheel (4), the inboard of shell (1) is equipped with confined cylinder (5), the one end of cylinder (5) is equipped with first delivery port (6), the other end of cylinder (5) is equipped with first discharge gate (7), be equipped with pivot (8) in cylinder (5), the outside of pivot (8) is equipped with helical first gusset (9), the laminating of the inner wall of first gusset (9) and cylinder (5), the both ends of pivot (8) all stretch out cylinder (5), the one end of pivot (8) is equipped with runner (10), the export of runner (10) is located the middle part of pivot (8), the other end and the shell (1) swivelling joint of pivot (8), the outside of pivot (8) other end is equipped with first follower (11), one side of first follower (11) is equipped with first action wheel (3) through first belt (12), one side of first follower (11) is equipped with axle sleeve (13) fixed with cylinder (5), axle sleeve (13) are connected with the rotation of shell (13) on the first follower (14), the second driven wheel (14) is connected with the second driving wheel (4) through a second belt (15);
the first rib plates (9) are fixed with the rotating shaft (8) through a plurality of connecting rods (16), second rib plates (17) which are spiral are arranged on the inner sides of the first rib plates (9), the second rib plates (17) are fixed with the rotating shaft (8), and the rotation directions of the second rib plates (17) and the first rib plates (9) are opposite;
the slurry is subjected to solid-liquid separation in the roller (5) to form a solid layer (18), and the front part of the first rib plate (9) is positioned in the solid layer (18);
the roller (5) comprises a separation section (31), a squeezing section (32) and a homogenizing section (33), wherein the separation section (31) and the homogenizing section (33) are all round tubes, the diameter of the separation section (31) is larger than that of the homogenizing section (33), and the squeezing section (32) is conical; the first water outlet (6) is positioned on the end face of the roller (5) close to the separation section (31), and the first discharge port (7) is positioned on the homogenizing section (33);
one end of the first rib plate (9) is close to the first water outlet (6), the other end of the first rib plate (9) extends into the homogenizing section (33), and an inner hole of the first rib plate (9) positioned in the homogenizing section (33) is attached to the rotating shaft (8); one end of the second rib plate (17) is close to the outlet of the runner (10), and the other end of the second rib plate (17) is positioned in the squeezing section (32);
the slurry is subjected to solid-liquid separation in the roller (5) to form a liquid layer (19), and the second rib plate (17) is positioned in the liquid layer (19).
2. The high-efficiency ultra-fine calcium carbonate slurry centrifugal dehydrator according to claim 1, wherein: a rotary joint (20) communicated with the runner (10) is arranged on the rotating shaft (8), and a feed pipe (21) penetrating through the shell (1) is arranged on the rotary joint (20); the bottom of shell (1) is equipped with second delivery port (22) and second discharge gate (23), and second delivery port (22) are located the below of first delivery port (6), and second discharge gate (23) are located the below of first discharge gate (7), are equipped with baffle (24) on the interior bottom surface of shell (1), and baffle (24) are located between second delivery port (22) and second discharge gate (23).
3. The high-efficiency ultra-fine calcium carbonate slurry centrifugal dehydrator according to claim 1, wherein: one end of pivot (8) is equipped with first bearing (25), and shell (1) is connected through first support (26) to first bearing (25), shell (1) is connected through second bearing (27) to the other end of pivot (8), the one end of cylinder (5) is equipped with third bearing (28) that are connected with first support (26), and the other end of cylinder (5) is equipped with fourth bearing (29), and shell (1) is connected through second support (30) to fourth bearing (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211072035.7A CN115338043B (en) | 2022-09-01 | 2022-09-01 | High-efficiency superfine calcium carbonate slurry centrifugal dehydration process and dehydrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211072035.7A CN115338043B (en) | 2022-09-01 | 2022-09-01 | High-efficiency superfine calcium carbonate slurry centrifugal dehydration process and dehydrator |
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| Publication Number | Publication Date |
|---|---|
| CN115338043A CN115338043A (en) | 2022-11-15 |
| CN115338043B true CN115338043B (en) | 2023-07-04 |
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| CN202211072035.7A Active CN115338043B (en) | 2022-09-01 | 2022-09-01 | High-efficiency superfine calcium carbonate slurry centrifugal dehydration process and dehydrator |
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| CN213612033U (en) * | 2020-11-17 | 2021-07-06 | 无锡市辉乐高机械有限公司 | Back-pushing deslagging structure of centrifugal machine spiral pusher |
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| CN109463783A (en) * | 2018-12-25 | 2019-03-15 | 济南大学 | A kind of squeezing axis and its vegetable dehydrator using squeezing axis |
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| US5234400A (en) * | 1991-05-10 | 1993-08-10 | Kloeckner-Humboldt-Deutz Ag | Method and apparatus for the separation, particularly classification of a solids/liquid mixture |
| US5833851A (en) * | 1996-11-07 | 1998-11-10 | Adams; Joseph L. | Method and apparatus for separating and deliquifying liquid slurries |
| CN213612033U (en) * | 2020-11-17 | 2021-07-06 | 无锡市辉乐高机械有限公司 | Back-pushing deslagging structure of centrifugal machine spiral pusher |
| CN213996304U (en) * | 2020-12-10 | 2021-08-20 | 江西华荣科技有限公司 | High-purity sodium tungstate production dehydration centrifuge |
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Denomination of invention: An efficient centrifugal dewatering process and dewatering machine for ultrafine calcium carbonate slurry Granted publication date: 20230704 Pledgee: China Postal Savings Bank Co.,Ltd. Jiande City Branch Pledgor: Hangzhou Zhenghe Nano Technology Co.,Ltd. Registration number: Y2024330000737 |