CN116492732A - A lithium carbonate filter, washing and drying three-in-one equipment and its production process - Google Patents

Abstract

The invention discloses a three-in-one equipment for filtering, washing and drying lithium carbonate and its production process, belonging to the technical field of lithium carbonate preparation. The stirring rod on the end and extending into the tank, the stirring blade on the stirring rod, and the feed inlet, liquid inlet, discharge port and waste discharge port on the tank body; the top of the tank body is equipped with The spray infusion pipe connected to the liquid inlet is provided with a plurality of spray heads, and the bottom of the tank body is provided with a filter mechanism. The lithium carbonate filtering, washing and drying three-in-one equipment and its production process can realize three-in-one filtering, washing and drying, which effectively simplifies the process flow, reduces the equipment footprint, and reduces the labor cost caused by material transfer. .

Description

A lithium carbonate filter, washing and drying three-in-one equipment and its production process

technical field

The invention relates to the technical field of lithium carbonate preparation, in particular to a lithium carbonate filtering, washing and drying three-in-one equipment and a production process thereof.

Background technique

Lithium carbonate is an inorganic compound, chemical formula Li ₂ CO ₃ , molecular weight 73.89, colorless monoclinic crystal, slightly soluble in water and dilute acid, insoluble in ethanol and acetone. The thermal stability is lower than that of other elements in the same group of carbonates in the periodic table, and it does not deliquesce in the air. It can be obtained by adding sodium carbonate to lithium sulfate or lithium oxide solution. Its aqueous solution can be converted into acid salt by adding carbon dioxide, and it will be hydrolyzed by boiling. Lithium carbonate can be used in the manufacture of lithium compounds, enamel, and glass. It is the raw material for the production of lithium compounds and metal lithium, and can be used as an electrolytic bath additive for aluminum smelting. It is widely used in industries such as glass, ceramics, medicine and food, and can also be used in synthetic rubber, dyes, semiconductors, military defense industry, television, atomic energy, medicine, catalysts, etc. It has a wide range of uses. In the preparation process of lithium carbonate , Filtration, washing, and drying are often carried out independently, resulting in cumbersome preparation processes, large equipment footprints, frequent manual transfer of materials, and high labor costs.

Contents of the invention

For the problems existing in the prior art, the object of the present invention is to provide a kind of Lithium Retard filter washing dry three-in-one equipment and production process thereof, this kind Lithium carbonate filter washing dry three-in-one equipment and production process thereof can realize filtration, The three-in-one process of washing and drying effectively simplifies the technological process, reduces the equipment footprint, and reduces the labor cost caused by material transfer.

The above-mentioned technical purpose of the present invention is achieved through the following technical proposals: a kind of lithium carbonate filtering, washing and drying three-in-one equipment, comprising a tank body, a motor arranged on the tank body, and a motor power output end arranged on the motor And extend into the stirring rod in the tank, the stirring blades arranged on the stirring rod and the feed inlet, liquid inlet, discharge port and waste discharge port provided on the tank body; the tank The top of the body is provided with a spray infusion pipe connected to the liquid inlet, and a plurality of spray heads are installed on the spray infusion pipe, and a filter mechanism is provided at the bottom of the tank body; the inner wall of the tank body There is a ring-shaped installation groove on the top, and a plurality of electromagnets are embedded on the side wall of the installation groove. An inner tank with two ends opening in a cylindrical structure is sealed and embedded in the installation groove. The inner wall of the inner tank is flush with the inner wall of the tank body, and an annular airtight cavity is formed between them; the inner tank includes a plurality of fixed heat conducting rings and a plurality of elastic rings connected in layers alternately, and the fixed heat conducting rings The ring is fixedly installed on the tank body through the connecting piece, and the outer wall of the fixed heat conducting ring is surrounded by a plurality of heat conducting tubes, and the elastic ring is embedded with a plurality of electric heating iron sheets in a circular array, and the plurality of pieces of the The position of the electric heating iron sheet is in one-to-one correspondence with the plurality of electromagnets, and the side of the electric heating iron sheet facing the axis of the elastic ring is provided with cooling fins; one side of the tank body is provided with a pressure regulating tube , one end of the pressure regulating tube is connected to the air pressure regulating mechanism, and the other end is branched into a plurality of output ends extending into the installation groove, and the output of the pressure regulating tube is distributed at the upper and lower ends of each electromagnet. end.

In some embodiments, the tank body is provided with a lifting mechanism, and the motor is arranged on the lifting mechanism. Driven by the lifting mechanism, the stirring rod can move along the inside of the tank body. The axis moves up and down.

In some embodiments, the tank body is provided with a dust collector, and the dust collector is externally connected with a dust removal mechanism.

In some embodiments, an air inlet is provided on the tank body, and the air inlet is externally connected to a nitrogen storage tank.

In some embodiments, the tank body is provided with a sampling port, and the opening and closing of the sampling port is controlled by a valve.

In some embodiments, the filtering mechanism includes a supporting net plate and a filter cloth detachably arranged on the supporting net plate.

In some embodiments, the spray infusion pipe is an annular pipe, which surrounds the stirring rod and is arranged against the inner wall of the tank body.

In some embodiments, the elastic ring is corrugated.

A lithium carbonate production technique is characterized in that, comprises the following steps:

S1, inject the solid-liquid mixture containing lithium carbonate solid and impurities into the tank through the feed port, and leave it to stand to separate the solid-liquid;

S2. Open the waste discharge port, and under the filtering action of the filter mechanism, filter out the waste liquid in the solid-liquid mixture in step S1 to obtain impurity-containing and moist lithium carbonate solids. Lithium carbonate solid stays on the filter mechanism, completes the filter operation;

S3. Inject the impurity solvent into the spray infusion tube through the liquid inlet, and then spray outwards from the spray head;

S4, start the motor, drive the stirring rod and the stirring blade to stir the material through the motor, continue to stir until the impurities are completely dissolved, and then open the waste discharge port to discharge the waste liquid to obtain wet lithium carbonate solid , now the wet lithium carbonate solid stays on the filter mechanism to complete the washing operation;

S5. Pass heat medium into the heat pipe, and at the same time, energize the electric heating iron sheet to generate heat, and at the same time keep the motor in the open state, and continuously stir the material through the stirring blade until the lithium carbonate is completely dry, and the drying is completed operate;

S6. Open the discharge port for discharging.

In summary, the present invention has the following beneficial effects:

The lithium carbonate filtering, washing and drying three-in-one equipment and its production process can realize three-in-one filtering, washing and drying, which effectively simplifies the process flow, reduces the equipment footprint, and reduces the labor cost caused by material transfer. , and the position adjustment of the electric heating iron sheet is realized through the electromagnet adsorption and the airflow transmission of the pressure regulating tube. During the filtration and washing stages, the electric heating iron sheet with heat dissipation fins can be wrapped by an elastic ring to avoid In the drying stage, the electric heating iron sheet can be fully exposed to achieve direct drying of the material, and the air flow in the tank can be intensified by controlling the repeated expansion or retraction of the elastic ring, especially in the In the drying stage, it can accelerate the drainage of water, thereby speeding up the drying speed, and controlling the repeated swelling or retraction of the elastic ring can shake off the adhered materials on the inner tank to avoid waste caused by material adhesion.

Description of drawings

Fig. 1 is the overall structural diagram of equipment of the present invention;

Fig. 2 is the sectional structural drawing of tank body of the present invention;

Fig. 3 is an enlarged view of A in Fig. 2 (usage scenario 1);

Fig. 4 is an enlarged view of place A in Fig. 2 (usage scenario 2);

Fig. 5 is an enlarged view of A in Fig. 2 (usage scenario 3);

Fig. 6 is a schematic structural view of the liner of the present invention.

In the figure: 1. Tank body; 101. Electromagnet; 2. Motor; 3. Stirring rod; 4. Lifting mechanism; 5. Feed inlet; 6. Dust collector; 7. Liquid inlet; 8. Air intake 9. Discharge port; 10. Sampling port; 11. Waste discharge port; 12. Leg; 13. Stirring blade; 14. Supporting mesh plate; 15. Filter cloth; 16. Spray infusion tube; 17. Spray 18, installation slot; 19, pressure regulating tube; 20, liner; 2001, fixed heat conduction ring; 2002, connector; 2003, heat conduction pipe; 2004, electric heating iron sheet; .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Figure 1-6, a three-in-one equipment for lithium carbonate filtration, washing and drying includes a tank body 1, a motor 2 installed on the tank body 1, and a power output end of the motor 2 that extends into the tank body 1 The stirring rod 3 inside, the stirring blade 13 arranged on the stirring rod 3 and the feed inlet 5, the liquid inlet 7, the discharge port 9 and the waste discharge port 11 provided on the tank body 1, the tank body 1 can pass through multiple Root support foot 12 is supported and placed on the ground, and the diameter of tank body 1 is preferably controlled within 3.6 meters.

The top in the tank body 1 is provided with a spray infusion pipe 16 connected to the liquid inlet 7, and a plurality of spray heads 17 are installed on the spray infusion pipe 16, and a filter mechanism is provided at the bottom of the tank body 1, and the tank body 1 An annular installation groove 18 is opened on the inner wall of the installation groove 18, and a plurality of electromagnets 101 are embedded in the side wall of the installation groove 18, and an inner tank 20 with two ends opening in a cylindrical structure is sealed and embedded in the installation groove 18. The inner wall of the liner 20 is flush with the inner wall of the tank body 1, and an annular airtight cavity is formed between them; the inner liner 20 includes a plurality of fixed heat conduction rings 2001 and a plurality of elastic rings 2006 connected in layers alternately, fixed heat conduction The ring 2001 is fixedly installed on the tank body 1 through the connecting piece 2002, and the outer wall of the fixed heat conduction ring 2001 is surrounded by a plurality of heat conduction tubes 2003, and the elastic ring 2006 is embedded with a plurality of electric heating iron sheets 2004 in a circular array. The positions of the iron sheet 2004 and the plurality of electromagnets 101 correspond one by one, and the electric heating iron sheet 2004 is provided with cooling fins 2005 on the side facing the axis of the elastic ring 2006; One end of the pressure tube 19 is connected to the air pressure regulating mechanism, and the other end is branched into a plurality of output ends and stretched into the installation groove 18. The upper and lower ends of each electromagnet 101 are all distributed with the output ends of the pressure regulating tube 19.

In order to speed up the heat transfer of the electric heating iron sheet 2004, the application sets the heat dissipation fins 2005 on the electric heating iron sheet 2004. The heat dissipation fins 2005 are generally thin metal sheets, which are easy to be exposed to in humid environments and long-term contact with chemical reagents. Corrosion damage, but if the electric heating iron sheet 2004 is not provided with cooling fins 2005, its heat transfer efficiency will be greatly reduced, so through the above technical solutions, the application also proposes a technical solution for protecting the cooling fins 2005, in lithium carbonate In the preparation process, both filtration and washing will create a humid environment with relatively concentrated chemical reagents. Therefore, in these two processes, the inner tank 20 can be set to the state shown in Figure 4, specifically, the electromagnet 101 is placed on the At this time, the electromagnet 101 firmly absorbs the electric heating iron sheet 2004, and then starts the air pressure regulating mechanism connected to the pressure regulating tube 19 to pressurize the inside of the installation groove 18. At this time, all output ends of the pressure regulating tube 19 are synchronized Inflate the installation groove 18 so that the elastic rings 2006 positioned at the upper and lower ends of the electric heating iron sheet 2004 bulge toward each other until they fit together (as shown in Figure 4 ). The side with the heat dissipation fins 2005 is completely wrapped, so as to isolate the heat dissipation fins 2005 from the space in the tank body 1, thus realizing the protection of the heat dissipation fins 2005, which can protect the heat dissipation fins 2005 from moisture and corrosion , and can keep the cooling fins 2005 dry, so as not to cause additional heat loss; and in the drying process, the humidity in the tank body 1 and the concentration of chemical reagents are greatly reduced. The heat conduction of the material can fully expose the electric heating iron sheet 2004 directly to the space in the tank body 1. Specifically, the electromagnet 101 is powered off, and at this time the electromagnet 101 no longer generates adsorption to the electric heating iron sheet 2004, thus at this time Under the action of the elastic recovery of the elastic ring 2006, the electric heating iron sheet 2004 is quickly reset and restored to the state shown in Figure 3. At this time, the cooling fins 2005 are directly exposed in the inner space of the tank body 1, so as to realize high efficiency for the materials. Heat conduction; it is also possible to intensify the air flow in the tank body 1 by controlling the repeated swelling or retraction of the elastic ring 2006, especially in the drying stage, which can accelerate the water discharge, thereby speeding up the drying speed, and control the repeated swelling or retraction of the elastic ring 2006 The retraction can shake off the material adhering to the liner 20 .

In some embodiments, as shown in FIG. 1 , the tank body 1 is provided with a lifting mechanism 4, and the motor 2 is arranged on the lifting mechanism 4. Under the driving action of the lifting mechanism 4, the stirring rod 3 can Move up and down along the axial direction, so that the stirring blade 13 can stir the material from shallow to deep, and realize more sufficient stirring.

In some embodiments, as shown in FIG. 1 , a dust collector 6 is provided on the tank body 1 , and the dust collector 6 is externally connected with a dust removal mechanism for collecting dust so as not to pollute the environment.

In some embodiments, as shown in FIG. 1 , the tank body 1 is provided with an air inlet 8, and the gas inlet 8 is externally connected to a nitrogen storage tank, so that nitrogen gas can be input into the tank body 1 to realize the cleaning of the tank body 1. Inertization of the internal environment.

In some embodiments, as shown in FIG. 1 , a sampling port 10 is provided on the tank body 1 , and the opening and closing of the sampling port 10 is controlled by a valve. The material can be sampled through the sampling port 10 to analyze whether the process is completed.

In some embodiments, as shown in FIG. 2 , the filter mechanism includes a support screen 14 and a filter cloth 15 detachably arranged on the support screen 14 to ensure that the filter cloth 15 can be replaced at will.

In some embodiments, as shown in FIG. 2 , the spray infusion pipe 16 is an annular pipe, which surrounds the stirring rod 3 and is arranged against the inner wall of the tank body 1 , which can effectively improve the uniformity of spraying.

In some embodiments, as shown in FIG. 6 , the elastic ring 2006 is in a corrugated shape, and the elastic ring 2006 of this structure has a longer stretching length, thereby reducing the requirement on the material of the elastic ring 2006 .

A lithium carbonate production technique is characterized in that, comprises the following steps:

S1. Inject the solid-liquid mixture containing lithium carbonate solid and impurities into the tank body 1 through the feed port 5, and leave it to stand to separate the solid-liquid;

S2, open the waste discharge port 11, under the filtration action of filter mechanism, the waste liquid in the solid-liquid mixture in step S1 is filtered out, obtain containing impurity and moist lithium carbonate solid, now contain impurity and moist lithium carbonate solid Stay on the filter mechanism to complete the filter operation;

S3, inject the impurity solvent into the spray infusion tube 16 through the liquid inlet 7, and then spray outwards from the spray head 17;

S4, start the motor 2, drive the stirring rod 3 and the stirring blade 13 to stir the material by the motor 2, continue to stir until the impurities are completely dissolved, then open the waste discharge port 11 to discharge the waste liquid, and obtain the wet lithium carbonate solid. Lithium carbonate solid stays on the filter mechanism to complete the washing operation;

S5. Lead heat medium into the heat guide pipe 2003. The heat medium can be hot steam or steam condensed water produced by the evaporator in the workshop, and use the waste heat of the condensed water to generate heat. The motor 2 is in the open state, and the material is continuously stirred by the stirring blade 13 until the lithium carbonate is completely dry, and the drying operation is completed;

S6. Open the discharge port 9 for discharging.

Through the above technical scheme, this three-in-one equipment for filtering, washing and drying lithium carbonate can realize three-in-one filtering, washing and drying, which effectively simplifies the process flow, reduces the equipment footprint, and reduces the labor caused by material transfer. cost, and the position adjustment of the electric heating iron sheet 2004 is realized through the adsorption of the electromagnet 101 and the airflow transmission of the pressure regulating tube 19, and the electric heating iron sheet 2004 with cooling fins 2005 can be wrapped by the elastic ring 2006 during the filtration and washing stages , so as to prevent the electric heating iron sheet 2004 with the heat dissipation fins 2005 from being damp and corroded, and in the drying stage, the electric heating iron sheet 2004 can be fully exposed to realize direct drying of the material, and by controlling the repeated swelling or return of the elastic ring 2006 Shrinkage can intensify the air flow in the tank body 1, especially in the drying stage, it can accelerate the water discharge, thereby speeding up the drying speed, and controlling the repeated expansion or retraction of the elastic ring 2006 can shake the material adhered to the inner tank 20. In addition, this process adopts PLC control throughout the process, which can realize automatic production, and the diameter of the tank body 1 of this equipment does not exceed 3.6 meters, which greatly reduces the occupied area. The equipment power is 55KW, which can be used for production The steam condensate generated by the evaporator in the workshop is used to dry lithium carbonate with waste heat, which can greatly reduce energy consumption. Compared with traditional equipment, it can save 8-9 million yuan in electricity costs every year.

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.

Claims (9)

1. The utility model provides a lithium carbonate filters washing dry trinity equipment which characterized in that:

the device comprises a tank body (1), a motor (2) arranged on the tank body (1), a stirring rod (3) arranged at the power output end of the motor (2) and extending into the tank body (1), stirring blades (13) arranged on the stirring rod (3), and a feed inlet (5), a liquid inlet (7), a discharge outlet (9) and a waste discharge outlet (11) which are arranged on the tank body (1);

a spray infusion tube (16) connected with the liquid inlet (7) is arranged at the top in the tank body (1), a plurality of spray heads (17) are arranged on the spray infusion tube (16), and a filtering mechanism is arranged at the bottom in the tank body (1);

an annular mounting groove (18) is formed in the inner wall of the tank body (1), a plurality of electromagnets (101) are embedded in the side wall of the mounting groove (18), an inner container (20) with two ends open in a cylindrical structure is embedded in the mounting groove (18) in a sealing manner, the inner wall of the inner container (20) is flush with the inner wall of the tank body (1), and an annular airtight cavity is formed between the inner container and the inner container;

the inner container (20) comprises a plurality of fixed heat conducting rings (2001) and a plurality of elastic rings (2006) which are alternately connected in a layered manner, the fixed heat conducting rings (2001) are fixedly arranged on the tank body (1) through connecting pieces (2002), a plurality of heat conducting pipes (2003) are arranged on the outer wall of each fixed heat conducting ring (2001) in a surrounding and laminating mode, a plurality of electric heating iron sheets (2004) are embedded in the elastic rings (2006) in an annular array mode, the electric heating iron sheets (2004) correspond to the positions of the electromagnets (101) one by one, and radiating fins (2005) are arranged on one side, facing the axial center of each elastic ring (2006), of each electric heating iron sheet (2004);

one side of the tank body (1) is provided with a pressure regulating pipe (19), one end of the pressure regulating pipe (19) is connected with an air pressure regulating mechanism, the other end of the pressure regulating pipe is branched into a plurality of output ends which extend into the mounting groove (18), and the output ends of the pressure regulating pipe (19) are distributed at the upper end and the lower end of each electromagnet (101).

2. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: the stirring tank is characterized in that a lifting mechanism (4) is arranged on the tank body (1), the motor (2) is arranged on the lifting mechanism (4), and the stirring rod (3) can move up and down along the axial direction in the tank body (1) under the driving action of the lifting mechanism (4).

3. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: the dust collector (6) is arranged on the tank body (1), and the dust collector (6) is externally connected with a dust removing mechanism.

4. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: an air inlet (8) is arranged on the tank body (1), and the air inlet (8) is externally connected with a nitrogen storage tank.

5. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: the tank body (1) is provided with a sampling port (10), and the sampling port (10) is controlled to be opened and closed through a valve.

6. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: the filtering mechanism comprises a supporting screen plate (14) and filter cloth (15) detachably arranged on the supporting screen plate (14).

7. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: the spray infusion tube (16) is an annular pipeline, surrounds the stirring rod (3) and is arranged against the inner wall of the tank body (1).

8. The lithium carbonate filtering, washing and drying three-in-one device according to claim 1, wherein: the elastic ring (2006) is corrugated.

9. A process for producing lithium carbonate based on the three-in-one equipment for filtering, washing and drying lithium carbonate according to any one of claims 1 to 8, characterized by comprising the following steps:

s1, injecting a solid-liquid mixture containing lithium carbonate solids and impurities into the tank body (1) through the feed inlet (5), and standing to separate the solids from the liquid;

s2, opening the waste discharge port (11), filtering the waste liquid in the solid-liquid mixture in the step S1 under the filtering action of the filtering mechanism to obtain impurity-containing and wet lithium carbonate solids, wherein the impurity-containing and wet lithium carbonate solids are retained on the filtering mechanism at the moment, and the filtering operation is completed;

s3, injecting an impurity solvent into the spray infusion tube (16) through the liquid inlet (7), and spraying the impurity solvent outwards through the spray header (17);

s4, starting the motor (2), driving the stirring rod (3) and the stirring blades (13) to stir materials through the motor (2), continuously stirring until impurities are thoroughly dissolved, then opening the waste discharge port (11) to discharge waste liquid, so as to obtain wet lithium carbonate solids, wherein the wet lithium carbonate solids are retained on the filtering mechanism, and washing operation is completed;

s5, introducing a heat medium into the heat conduction pipe (2003), simultaneously electrifying the electric heating iron sheet (2004) to generate heat, simultaneously keeping the motor (2) in an on state, and continuously stirring materials through the stirring blades (13) until lithium carbonate is completely dried, so as to finish drying operation;

s6, opening the discharge hole (9) to discharge.