CN114425553A - Purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment - Google Patents
Purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment Download PDFInfo
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- CN114425553A CN114425553A CN202210047772.5A CN202210047772A CN114425553A CN 114425553 A CN114425553 A CN 114425553A CN 202210047772 A CN202210047772 A CN 202210047772A CN 114425553 A CN114425553 A CN 114425553A
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- magnesium hydroxide
- barrel
- solid waste
- hydroxide powder
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- 238000003756 stirring Methods 0.000 title claims abstract description 142
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 title claims abstract description 113
- 229910001862 magnesium hydroxide Inorganic materials 0.000 title claims abstract description 113
- 239000000347 magnesium hydroxide Substances 0.000 title claims abstract description 113
- 238000001035 drying Methods 0.000 title claims abstract description 41
- 239000002910 solid waste Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007670 refining Methods 0.000 title claims abstract description 17
- 238000000746 purification Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 10
- 238000010992 reflux Methods 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052744 lithium Inorganic materials 0.000 abstract description 8
- 239000012267 brine Substances 0.000 abstract description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000002425 crystallisation Methods 0.000 abstract description 2
- 230000008025 crystallization Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 6
- 235000017491 Bambusa tulda Nutrition 0.000 description 6
- 241001330002 Bambuseae Species 0.000 description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 6
- 239000011425 bamboo Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application discloses a purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment, wherein the method comprises the following steps: crushing the magnesium hydroxide solid waste by a blade at the edge of the stirring blade, and heating the magnesium hydroxide solid waste by hot air and the stirring blade; the stirring blade generates an upward airflow to enable the magnesium hydroxide powder to enter the cyclone separator; the cyclone separator separates the magnesium hydroxide powder from the gas flow; the air flow enters the bag type dust collector through the exhaust pipe; the bag type dust collector collects magnesium hydroxide powder in the air flow to a filter bag, and the filtered air is discharged to the atmosphere under the action of an induced draft fan. The equipment comprises a heating mechanism, a stirring mechanism, a filter screen, a sealing ring, a vibrator, a backflow cylinder, a stirring barrel and a cutting knife. The heating mechanism comprises a controller, an electric rotary connector and a heating wire arranged in the stirring blade. The method solves the problem that in the prior art, magnesium hydroxide obtained after evaporation crystallization of the lithium extraction waste liquid from salt lake brine is low in quality and cannot meet market standards.
Description
Technical Field
The application belongs to the technical field of chemical industry, and particularly relates to a purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment.
Background
The production of lithium carbonate mainly comprises two modes of extracting lithium from ores and extracting lithium from salt lakes, and the lithium carbonate mainly adopts the ores to extract the lithium in China all the time, but the production cost is higher. The process for extracting lithium from the salt lake is simple and the production cost is low. According to statistics, the lithium resource of the salt lake brine occupies 70-80% of the resource reserve in China, so that the extraction of lithium carbonate from the salt lake brine becomes the main attack direction of lithium salt production. The production process for extracting lithium from brine mainly comprises a precipitation method, an extraction method, an ion exchange adsorption method, a carbonization method and the like, while the ion exchange adsorption method is mature and widely applied at present, but the content of magnesium hydroxide is improved, but the quality is low and cannot meet the market requirement after the waste slurry rich in magnesium hydroxide generated in the elution process is evaporated and crystallized.
Disclosure of Invention
The embodiment of the application provides a purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment, and solves the problem that in the prior art, magnesium hydroxide obtained after evaporation and crystallization of lithium extraction waste liquid of salt lake brine is low in quality and cannot meet market standards.
In order to achieve the above purpose, an embodiment of the present invention provides a method for purifying and refining magnesium hydroxide solid waste, which includes the following steps:
conveying the magnesium hydroxide solid waste into stirring and drying equipment through a feeder;
conveying hot air to a hot air inlet of the stirring and drying device;
starting a heating mechanism of the stirring drying equipment, wherein a heating wire of the heating mechanism heats the stirring blade;
starting a stirring mechanism of the stirring drying equipment, wherein a motor of the stirring mechanism drives the stirring blade to rotate;
when the stirring blade rotates, the blades at the edge of the stirring blade crush the magnesium hydroxide solid waste, and simultaneously the stirring blade heats and dries the magnesium hydroxide solid waste; the stirring blade with the spiral structure generates upward airflow, so that the crushed magnesium hydroxide powder enters an air inlet of the cyclone separator through a flow guide port at the top of the stirring drying equipment;
the cyclone separator separates the magnesium hydroxide powder from the airflow, and the magnesium hydroxide powder enters a collection bag through a powder outlet; the air flow enters the bag type dust collector through the exhaust pipe;
the bag type dust collector collects magnesium hydroxide powder in the air flow to a filter bag, and filtered air is discharged to the atmosphere under the action of an induced draft fan.
In a possible implementation manner, the crushed magnesium hydroxide powder passes through a filter screen in the stirring and drying equipment and then enters the air inlet of the cyclone separator through the flow guide port.
In a possible implementation manner, after the stirring mechanism is started, the rapping device is started, and the output shaft of the rapping device drives the filter screen to do reciprocating motion.
In a possible implementation manner, the crushed magnesium hydroxide powder moves upwards in the backflow cylinder under the action of the airflow, one part of the magnesium hydroxide powder passes through the filter screen, the other part of the magnesium hydroxide powder enters the space between the backflow cylinder and the inner wall of the stirring drying device and then enters the backflow cylinder again from the bottom of the backflow cylinder, and the blades at the edge of the stirring blades crush the magnesium hydroxide powder again.
In one possible implementation, the magnesium hydroxide powder is crushed by vertically arranged cutting knives as the magnesium hydroxide powder is moved upwards by the gas flow.
In one possible implementation, air output by the blower is delivered to an air inlet of the heater, and an air outlet of the heater delivers hot air to a hot air inlet of the agitation drying apparatus.
The embodiment of the invention also provides stirring and drying equipment, which comprises a heating mechanism, a stirring mechanism, a filter screen, a sealing ring, a vibrator, a backflow cylinder, a stirring barrel and a cutting knife;
the top of the stirring barrel is provided with a flow guide port;
the stirring mechanism comprises a motor, a plurality of stirring blades, a driving shaft, a driving bevel gear and a driven bevel gear which are meshed with each other;
the driving bevel gear is arranged on an output shaft of the motor, and the driven bevel gear is arranged at the lower end of the driving shaft; the upper end of the driving shaft penetrates through the bottom of the stirring barrel and then extends into the stirring barrel; the stirring blades are arranged at the upper end of the driving shaft at intervals in a staggered manner, and blades are arranged at the edges of the stirring blades; the stirring blade is of a spiral structure;
the heating mechanism comprises a controller, an electric rotary connector and a heating wire arranged in the stirring blade;
the cable of the heating wire penetrates through a hole in the center of the driving shaft and then is connected to one end of the electric rotary connector, and the other end of the electric rotary connector is connected to a control signal output end of the controller;
the filter screen is arranged at the upper end of the stirring barrel through the sealing ring, the sealing ring is of a flexible structure, and an output shaft of the vibrator extends into the stirring barrel and then is connected with the filter screen;
the backflow barrel is arranged in the stirring barrel, the side wall of the backflow barrel and the inner wall of the stirring barrel are arranged at intervals, the lower end of the backflow barrel and the bottom of the stirring barrel are arranged at intervals, the upper end of the backflow barrel and the filter screen are arranged at intervals, and the stirring blade is positioned at the lower part in the backflow barrel;
a gas pipe is arranged in the stirring barrel, the hot gas inlet is arranged on the side wall of the stirring barrel, the gas pipe is of an L-shaped structure, the gas inlet of the gas pipe is connected to the hot gas inlet, and the gas outlet of the gas pipe extends into the reflux barrel;
the number of the cutting knives is multiple, and the cutting knives are vertically arranged on the middle upper part of the backflow cylinder.
One or more technical schemes provided in the embodiments of the present invention have at least the following technical effects or advantages:
the embodiment of the invention provides a purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment, wherein a stirring blade can be heated to 120-140 ℃, the heated stirring blade can also heat and dry the magnesium hydroxide solid waste when crushing the magnesium hydroxide solid waste, the stirring blade with a spiral structure generates upward airflow, the airflow is also heated, so that the crushed magnesium hydroxide powder can be further heated and dried, the crushed magnesium hydroxide powder is conveyed to a cyclone separator, the cyclone separator separates the magnesium hydroxide powder from the airflow, the magnesium hydroxide powder enters a collecting bag for collection, a bag type dust collector can collect a small amount of magnesium hydroxide powder left in the airflow to a filter bag, and the filtered gas is discharged to the atmosphere under the action of a draught fan. The bag type dust collector enables the gas exhausted to the atmosphere by the induced draft fan to meet the environmental protection requirement. The method can prepare high-purity magnesium hydroxide through drying and crushing, so that the moisture of the magnesium hydroxide solid waste can be thoroughly removed, the large-particle magnesium hydroxide solid waste is circularly stirred, dried and crushed by airflow until the moisture is thoroughly removed, and finally the purification and refining of the magnesium hydroxide are realized, and the prepared magnesium hydroxide product can reach the grade of high-quality products, thereby meeting the market demand.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some of the embodiments described in the present application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a method for purifying and refining magnesium hydroxide solid waste according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an agitation drying apparatus provided in an embodiment of the present invention.
Reference numerals: 1-a heating mechanism; 11-a controller; 12-an electrical rotary connector; 13-heating the wire; 2-a stirring mechanism; 21-a motor; 22-stirring blades; 23-a drive shaft; 24-a drive bevel gear; 25-a driven bevel gear; 3, filtering the filter screen; 4-a sealing ring; 5-a vibrator; 6-a reflux drum; 7-a cutter; 8-stirring barrel; 81-a flow guide port; 9-gas transmission pipe; 10-stirring and drying equipment; 20-a cyclone separator; 30-a bag filter; 40-an induced draft fan; 50-a blower; 60-a heater.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
As shown in fig. 1 and fig. 2, the method for purifying and refining magnesium hydroxide solid waste provided by the embodiment of the invention comprises the following steps:
and conveying the magnesium hydroxide solid waste into the stirring and drying equipment 10 through a feeder.
Hot air is delivered to the hot air inlet of the agitation drying apparatus 10.
The heating mechanism 1 of the stirring and drying device 10 is started, and the heating wire 13 of the heating mechanism 1 heats the stirring blade 22.
The stirring mechanism 2 of the stirring drying device 10 is started, and the motor 21 of the stirring mechanism 2 drives the stirring blade 22 to rotate.
When the stirring blade 22 rotates, the blades at the edge of the stirring blade 22 crush the magnesium hydroxide solid waste, and the stirring blade 22 heats and dries the magnesium hydroxide solid waste. The stirring blade 22 with a spiral structure generates an upward airflow, so that the crushed magnesium hydroxide powder enters the air inlet of the cyclone separator 20 through the flow guide port 81 at the top of the stirring drying device 10.
The cyclone 20 separates the magnesium hydroxide powder from the gas stream, which enters the collection bag through the outlet. The airflow enters the bag house 30 through the exhaust duct.
The bag collector 30 collects the magnesium hydroxide powder in the air flow to a filter bag, and the filtered air is discharged to the atmosphere under the action of the induced draft fan 40.
It should be noted that, by controlling the rotation speed of the stirring blade 22 and the power of the induced draft fan 40, an airflow with a set speed can be formed in the stirring and drying device 10, so that the magnesium hydroxide powder meeting the standard moves upward to pass through the diversion opening 81, and the magnesium hydroxide particles with larger diameters fall to the stirring blade 22 under the action of the gravity of the magnesium hydroxide particles to be crushed again. The hot air can preheat the magnesium hydroxide solid waste in the stirring drying device 10 and form a flowing air flow to the guide opening 81.
The stirring blade 22 can be heated to 120-140 ℃, the heated stirring blade 22 can also heat and dry magnesium hydroxide solid waste when the magnesium hydroxide solid waste is crushed, the stirring blade 22 with the spiral structure generates upward air flow, the air flow is also heated, so that the crushed magnesium hydroxide powder can be further heated and dried, the crushed magnesium hydroxide powder is conveyed to the cyclone separator 20, the cyclone separator 20 separates the magnesium hydroxide powder from the air flow, the magnesium hydroxide powder enters the collecting bag to be collected, the bag-type dust collector 30 can collect a small amount of magnesium hydroxide powder left in the air flow to the filtering bag, and the filtered gas is discharged to the atmosphere under the action of the induced draft fan 40. The bag-type dust collector 30 enables the gas exhausted to the atmosphere by the induced draft fan 40 to meet the environmental protection requirement. The method can prepare high-purity magnesium hydroxide through drying and crushing, so that the moisture of the magnesium hydroxide solid waste can be thoroughly removed, the large-particle magnesium hydroxide solid waste is circularly stirred, dried and crushed by airflow until the moisture is thoroughly removed, and finally the purification and refining of the magnesium hydroxide are realized, and the prepared magnesium hydroxide product can reach the grade of high-quality products, the content of the magnesium hydroxide in quality indexes is more than 98%, the moisture is less than 0.5%, and the chloride is less than 0.1%, so that the market demand is met.
In this embodiment, the crushed magnesium hydroxide powder passes through the filter screen 3 in the stirring and drying device 10 and then enters the air inlet of the cyclone separator 20 through the flow guide port 81.
The magnesium hydroxide powder having a particle size smaller than the predetermined particle size can pass through the filter screen 3, and the crushing process of the magnesium hydroxide powder having a larger particle size is continued in the stirring drying device 10. Thereby ensuring that the particle size of the magnesium hydroxide product meets the standard.
In this embodiment, after the stirring mechanism 2 is started, the rapping device 5 is started, and the output shaft of the rapping device 5 drives the filter screen 3 to reciprocate.
It should be noted that the filter screen 3 which reciprocates can shake and separate the magnesium hydroxide powder blocked on the filter screen 3, thereby preventing the filter screen 3 from being blocked and ensuring that the magnesium hydroxide powder meeting the standard can pass through the filter screen 3.
In this embodiment, the crushed magnesium hydroxide powder moves upward in the reflux drum 6 under the action of the airflow, a part of the magnesium hydroxide powder passes through the filter screen 3, another part of the magnesium hydroxide powder enters the space between the reflux drum 6 and the inner wall of the stirring drying device 10, and then enters the reflux drum 6 again from the bottom of the reflux drum 6, and the blade at the edge of the stirring blade 22 crushes the magnesium hydroxide powder again.
The rotating speed of the stirring blades 22 and the power of the induced draft fan 40 are controlled, so that airflow with a set speed can be formed in the reflux cylinder 6, and accordingly, the magnesium hydroxide powder meeting the standard moves upwards to pass through the filter screen 3, and magnesium hydroxide particles with larger diameters fall to the stirring blades 22 under the action of gravity to be crushed again.
It should be noted that the reflux drum 6 and the stirring and drying device 10 are configured to form a flow direction of the air flow as indicated by the arrow in fig. 2, so as to achieve the purpose of circulating crushing of the magnesium hydroxide powder, and to avoid the problem that part of the magnesium hydroxide powder is gathered in the space above the stirring blade 22 and is difficult to be crushed by the stirring blade 22.
In this embodiment, when the magnesium hydroxide powder moves upward under the action of the airflow, the magnesium hydroxide powder is crushed by the vertically arranged cutter 7.
It should be noted that the vertically arranged cutting knife 7 can improve the crushing efficiency of the magnesium hydroxide powder.
In this embodiment, air output from the blower 50 is delivered to the air inlet of the heater 60, and the air outlet of the heater 60 delivers hot air to the hot air inlet of the agitation drying apparatus 10.
The heater 60 has a heating coil built therein, and saturated steam of 1.0MPa is supplied to an inlet of the heating coil. The saturated steam of 1.0MPa can heat the air output by the blower 50, so that the solid magnesium hydroxide waste is dried and pulverized in the stirring process.
The embodiment of the invention also provides stirring and drying equipment 10 which comprises a heating mechanism 1, a stirring mechanism 2, a filter screen 3, a sealing ring 4, a vibrator 5, a backflow cylinder 6 and a cutting knife 7.
The top of the stirring barrel 8 is a diversion port 81. The diversion port 81 is of a closing structure.
The stirring mechanism 2 includes a motor 21, a plurality of stirring blades 22, a drive shaft 23, and a driving bevel gear 24 and a driven bevel gear 25 that mesh with each other. The driving bevel gear 24 and the driven bevel gear 25 can change the rotational direction of the moment.
A driving bevel gear 24 is provided on an output shaft of the motor 21, and a driven bevel gear 25 is provided at a lower end of the driving shaft 23. The upper end of the drive shaft 23 penetrates the bottom of the stirring barrel 8 and then extends into the stirring barrel 8. The plurality of stirring blades 22 are installed at the upper end of the driving shaft 23 at intervals and in a staggered manner, and blades are provided at the edges of the stirring blades 22. The stirring vanes 22 are of helical configuration. The structural form of the stirring blades 22 can improve the efficiency of crushing the magnesium hydroxide solid waste. The blade at the edge of the stirring blade 22 and the main structure of the stirring blade 22 are of an integral structure.
The heating mechanism 1 includes a controller 11, an electric rotary connector 12, and a heating wire 13 provided inside an agitating blade 22.
The cable of the heating wire 13 is connected to one end of the electrical rotary connector 12 after passing through a hole in the center of the driving shaft 23, and the other end of the electrical rotary connector 12 is connected to a control signal output end of the controller 11. The electrical rotary connector 12 is able to maintain a good electrical connection relationship when the drive shaft 23 rotates relative to the controller 11.
The filter screen 3 is installed in the upper end of the stirring barrel 8 through the sealing ring 4, the sealing ring 4 is of a flexible structure, and the output shaft of the vibrator 5 extends into the stirring barrel 8 and then is connected to the filter screen 3. As shown in fig. 2, the cross-section of the filter net 3 is an arc-shaped structure, thereby facilitating the air flow to form a circulation path of the air flow in fig. 1. The sealing ring 4 can play a role in flexible connection and sealing. Thereby ensuring that the magnesium hydroxide powder can only enter the cyclone separator 20 from the filter screen 3 and ensuring that the vibrator 5 can drive the filter screen 3 to do reciprocating motion.
Be provided with backward flow section of thick bamboo 6 in the agitator 8, the inner wall interval of 6 lateral walls of backward flow section of thick bamboo and agitator 8 sets up, and the lower extreme of backward flow section of thick bamboo 6 sets up with the bottom interval of agitator 8, and the upper end of backward flow section of thick bamboo 6 sets up with filter screen 3 interval, and stirring vane 22 is located the lower part in backward flow section of thick bamboo 6. The reflow barrel 6 is used to form a flow pattern of the gas flow as shown in fig. 2, thereby achieving the purpose of cyclic crushing of the magnesium hydroxide powder. The side wall of the reflux drum 6 is connected with the inner wall of the stirring barrel 8 through a bracket.
A gas pipe 9 is arranged in the stirring barrel 8, a hot gas inlet is formed in the side wall of the stirring barrel 8, the gas pipe 9 is of an L-shaped structure, a gas inlet of the gas pipe 9 is connected to the hot gas inlet, and a gas outlet of the gas pipe 9 extends into the reflux drum 6; the pipeline axis of the gas pipe 9 in the reflux cylinder 6 is parallel to the axis of the reflux cylinder 6, so that the input hot air can heat the magnesium hydroxide solid waste, and simultaneously, the flowing form of gas flow shown in figure 2 is formed, so that the magnesium hydroxide powder is circularly crushed.
The cutting knife 7 quantity is a plurality of, and a plurality of cutting knives 7 are vertical to be set up in the well upper portion of a backward flow section of thick bamboo 6. The cutter 7 is capable of further crushing the upwardly moving magnesium hydroxide powder. The cutting knife 7 is vertically arranged to avoid the side wall of the cutting knife 7 blocking the upward moving path of the magnesium hydroxide powder.
In this embodiment, it is apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. The method for purifying and refining the magnesium hydroxide solid waste is characterized by comprising the following steps of:
conveying the magnesium hydroxide solid waste into stirring and drying equipment (10) through a feeder;
-feeding hot air to the hot air inlet of the agitation drying apparatus (10);
starting a heating mechanism (1) of the stirring drying equipment (10), wherein a heating wire (13) of the heating mechanism (1) heats a stirring blade (22);
starting a stirring mechanism (2) of the stirring drying equipment (10), wherein a motor (21) of the stirring mechanism (2) drives a stirring blade (22) to rotate;
when the stirring blade (22) rotates, the blades at the edge of the stirring blade (22) crush the magnesium hydroxide solid waste, and simultaneously the stirring blade (22) heats and dries the magnesium hydroxide solid waste; the stirring blade (22) with a spiral structure generates an upward airflow, so that the crushed magnesium hydroxide powder enters an air inlet of the cyclone separator (20) through a flow guide opening (81) at the top of the stirring drying equipment (10);
the cyclone separator (20) separates the magnesium hydroxide powder from the gas stream, the magnesium hydroxide powder entering a collection bag through a powder outlet; the air flow enters the bag type dust collector (30) through the exhaust pipe;
the bag type dust collector (30) collects magnesium hydroxide powder in the air flow to a filter bag, and the filtered air is discharged to the atmosphere under the action of an induced draft fan (40).
2. The method for purifying and refining the magnesium hydroxide solid waste according to claim 1, wherein: the crushed magnesium hydroxide powder passes through a filter screen (3) in the stirring and drying equipment (10) and then enters an air inlet of the cyclone separator (20) through the flow guide opening (81).
3. The method for purifying and refining the magnesium hydroxide solid waste according to claim 2, wherein: after the stirring mechanism (2) is started, a vibrator (5) is started, and an output shaft of the vibrator (5) drives the filter screen (3) to do reciprocating motion.
4. The method for purifying and refining the magnesium hydroxide solid waste according to claim 3, wherein: the crushed magnesium hydroxide powder moves upwards in the backflow cylinder (6) under the action of air flow, one part of the magnesium hydroxide powder passes through the filter screen (3), the other part of the magnesium hydroxide powder enters a space between the backflow cylinder (6) and the inner wall of the stirring drying device (10), then the magnesium hydroxide powder enters the backflow cylinder (6) again from the bottom of the backflow cylinder (6), and the blades at the edge of the stirring blades (22) crush the magnesium hydroxide powder again.
5. The method for purifying and refining the magnesium hydroxide solid waste according to claim 1, wherein: when the magnesium hydroxide powder moves upwards under the action of the airflow, the magnesium hydroxide powder is crushed by a vertically arranged cutting knife (7).
6. The method for purifying and refining the magnesium hydroxide solid waste according to claim 1, wherein: air output by the blower (50) is conveyed to an air inlet of the heater (60), and hot air is conveyed to a hot air inlet of the stirring and drying equipment (10) by an air outlet of the heater (60).
7. A stirring drying equipment which characterized in that: comprises a heating mechanism (1), a stirring mechanism (2), a filter screen (3), a sealing ring (4), a vibrator (5), a reflux cylinder (6), a stirring barrel (8) and a cutting knife (7);
the top of the stirring barrel (8) is provided with a flow guide port (81);
the stirring mechanism (2) comprises a motor (21), a plurality of stirring blades (22), a driving shaft (23), a driving bevel gear (24) and a driven bevel gear (25) which are meshed with each other;
the output shaft of the motor (21) is provided with the driving bevel gear (24), and the lower end of the driving shaft (23) is provided with the driven bevel gear (25); the upper end of the driving shaft (23) penetrates through the bottom of the stirring barrel (8) and then extends into the stirring barrel (8); the stirring blades (22) are arranged at the upper end of the driving shaft (23) at intervals in a staggered manner, and blades are arranged at the edges of the stirring blades (22); the stirring blade (22) is of a spiral structure;
the heating mechanism (1) comprises a controller (11), an electric rotary connector (12) and a heating wire (13) arranged in the stirring blade (22);
the cable of the heating wire (13) passes through a hole in the center of the driving shaft (23) and then is connected to one end of the electric rotary connector (12), and the other end of the electric rotary connector (12) is connected to a control signal output end of the controller (11);
the filter screen (3) is arranged at the upper end of the stirring barrel (8) through the sealing ring (4), the sealing ring (4) is of a flexible structure, and an output shaft of the vibrator (5) extends into the stirring barrel (8) and then is connected with the filter screen (3);
the backflow barrel (6) is arranged in the stirring barrel (8), the side wall of the backflow barrel (6) and the inner wall of the stirring barrel (8) are arranged at intervals, the lower end of the backflow barrel (6) and the bottom of the stirring barrel (8) are arranged at intervals, the upper end of the backflow barrel (6) and the filter screen (3) are arranged at intervals, and the stirring blades (22) are located at the lower part in the backflow barrel (6);
an air pipe (9) is arranged in the stirring barrel (8), the hot air inlet is formed in the side wall of the stirring barrel (8), the air pipe (9) is of an L-shaped structure, an air inlet of the air pipe (9) is connected to the hot air inlet, and an air outlet of the air pipe (9) extends into the backflow barrel (6);
the number of the cutting knives (7) is multiple, and the cutting knives (7) are vertically arranged on the middle upper part of the backflow cylinder (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047772.5A CN114425553A (en) | 2022-01-17 | 2022-01-17 | Purification and refining method of magnesium hydroxide solid waste and stirring and drying equipment |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1142525A (en) * | 1966-05-16 | 1969-02-12 | Hardwood Drying & Mfg Co Inc | Improvements in drying process |
| CN86108214A (en) * | 1985-12-05 | 1987-07-08 | 英美烟草公司 | The modification method that relevant pellet is handled |
| CN1047663A (en) * | 1989-03-08 | 1990-12-12 | 詹姆斯·纳特 | The heat treating method of glass batch and equipment |
| CN2705764Y (en) * | 2004-01-12 | 2005-06-22 | 浙江大学 | Sleeve type rotary air flow quick drier |
| CN102794026A (en) * | 2012-08-03 | 2012-11-28 | 梁首强 | Method and system for grinding, evaporating and drying materials |
| CN202707070U (en) * | 2012-08-09 | 2013-01-30 | 中铁隧道装备制造有限公司 | Composite shield machine with earth pressure balance and slurry balance double modes |
| CN204543626U (en) * | 2015-01-24 | 2015-08-12 | 袁黄颖倩 | A kind of efficient biochemical extractor |
| CN105806072A (en) * | 2014-12-30 | 2016-07-27 | 哈尔滨顺芝科技有限公司 | Aluminum oxide drying system and method |
| CN205619724U (en) * | 2016-04-28 | 2016-10-05 | 自贡市锋锐新材料有限公司 | Carborundum drying -machine |
| CN106440683A (en) * | 2016-11-04 | 2017-02-22 | 湖南康易达绿茵科技有限公司 | Space-adjustable back suction type high-efficiency hot air drying box equipment |
| CN209230140U (en) * | 2018-10-18 | 2019-08-09 | 赣州市赣县区鑫德矿业有限公司 | A kind of order of ammoniumparatungstate crystal high-efficiency drying apparatus |
| CN209335874U (en) * | 2018-11-13 | 2019-09-03 | 江苏洁润管业有限公司 | A kind of highly effective drying plastic dryer |
| CN211436496U (en) * | 2019-12-13 | 2020-09-08 | 永春县兴宇环保材料有限公司 | Superfine calcium oxide production equipment |
-
2022
- 2022-01-17 CN CN202210047772.5A patent/CN114425553A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1142525A (en) * | 1966-05-16 | 1969-02-12 | Hardwood Drying & Mfg Co Inc | Improvements in drying process |
| CN86108214A (en) * | 1985-12-05 | 1987-07-08 | 英美烟草公司 | The modification method that relevant pellet is handled |
| CN1047663A (en) * | 1989-03-08 | 1990-12-12 | 詹姆斯·纳特 | The heat treating method of glass batch and equipment |
| CN2705764Y (en) * | 2004-01-12 | 2005-06-22 | 浙江大学 | Sleeve type rotary air flow quick drier |
| CN102794026A (en) * | 2012-08-03 | 2012-11-28 | 梁首强 | Method and system for grinding, evaporating and drying materials |
| CN202707070U (en) * | 2012-08-09 | 2013-01-30 | 中铁隧道装备制造有限公司 | Composite shield machine with earth pressure balance and slurry balance double modes |
| CN105806072A (en) * | 2014-12-30 | 2016-07-27 | 哈尔滨顺芝科技有限公司 | Aluminum oxide drying system and method |
| CN204543626U (en) * | 2015-01-24 | 2015-08-12 | 袁黄颖倩 | A kind of efficient biochemical extractor |
| CN205619724U (en) * | 2016-04-28 | 2016-10-05 | 自贡市锋锐新材料有限公司 | Carborundum drying -machine |
| CN106440683A (en) * | 2016-11-04 | 2017-02-22 | 湖南康易达绿茵科技有限公司 | Space-adjustable back suction type high-efficiency hot air drying box equipment |
| CN209230140U (en) * | 2018-10-18 | 2019-08-09 | 赣州市赣县区鑫德矿业有限公司 | A kind of order of ammoniumparatungstate crystal high-efficiency drying apparatus |
| CN209335874U (en) * | 2018-11-13 | 2019-09-03 | 江苏洁润管业有限公司 | A kind of highly effective drying plastic dryer |
| CN211436496U (en) * | 2019-12-13 | 2020-09-08 | 永春县兴宇环保材料有限公司 | Superfine calcium oxide production equipment |
Non-Patent Citations (1)
| Title |
|---|
| ARUN S. MUJUMDAR著: "《中国建材技术装备制造安装维护与修理》", 北京：中国轻工业出版社，2007年2月出版。, pages: 292 - 293 * |
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