CN111921241A - Stirred tank filter based on green manufacturing of ternary material - Google Patents

Abstract

The invention relates to the technical field of ternary material manufacturing, in particular to a stirred tank filter based on green manufacturing of ternary materials. The invention includes a tank body formed by axially abutting an upper shell and a lower base, and the lower base is provided with a filtering surface with a water filtering function; the filter also includes a spraying component and a stirring component; and a feeding pipe communicating with the stirring chamber And the solid discharge pipe is arranged at the upper casing, and the water outlet pipe that communicates with the water filter chamber is arranged at the lower base; the upper casing and the lower base are locked with each other by locking components. The invention can effectively guarantee its own production capacity and production efficiency while adapting to the process requirements of large production scale of ternary materials, high requirements for water content and washing effect, high requirements for particle crystal form, high requirements for purity and high requirements for closed operation. , and simultaneously meet the green manufacturing features of efficiency enhancement, energy saving, consumption reduction and emission reduction required by current green manufacturing.

Description

A stirred tank filter based on green manufacturing of ternary materials

technical field

The invention relates to the technical field of ternary material manufacturing, in particular to a stirred tank filter based on green manufacturing of ternary materials.

Background technique

Lithium-ion batteries were commercialized in 1991 due to their advantages of high energy density, high output voltage, high power, low self-discharge, no memory effect, wide operating temperature range, and environmental protection. At present, lithium-ion batteries have become the preferred power source for notebook computers, mobile phones, digital cameras, flashlights, and other electronic products; ternary materials are currently one of the main components of the positive electrode of lithium-ion batteries. The traditional synthetic ternary materials mainly include high-temperature solid-phase method, low-heat solid-phase method, sol-gel method, co-precipitation method, etc.; Lithium volatilizes; the cost of co-precipitation is low, and the products are mixed relatively uniformly, but the process of preparing precursors by co-precipitation is complicated, and the precipitation rates of different cations are different; in the sol-gel method, the material is obtained in the liquid phase, and the ions are It can be fully mixed to obtain a pure phase material, but there are many factors affecting the gel, and the morphology and particle size of the product are not easy to control. Therefore, people began to use the co-precipitation method to synthesize ternary precursors, and then use the high-temperature solid-phase method to synthesize the final product.

When using the co-precipitation-high temperature solid phase method to produce ternary materials, the production process is mainly composed of stirring and mixing, precipitation reaction, solid-liquid separation, washing and impurity removal, drying and other sections, and the corresponding equipment is agitating and mixing arranged in sequence along the production process. Equipment, reaction kettles, automatic centrifuges, filters, dryers, etc., there are problems of long process routes and many equipments, the whole process energy consumption is large, the efficiency is limited, the consumption of washing liquid is large, and ternary materials are also added. The risk of difficult quality control and high cost obviously does not have the characteristics of efficiency enhancement, energy saving, consumption reduction and emission reduction required by current green manufacturing. Especially for the filtration and washing stage, most ternary material manufacturers habitually use automatic centrifuges to realize this process. Automatic centrifuge is a filter type, automatic lower discharge, batch type centrifuge. The liquid separation speed is fast, and the obtained filter cake has a low moisture content, which can improve the drying efficiency of the subsequent drying stage to a certain extent. However, the problems existing in the automatic centrifuge to realize the ternary material filtration and washing process are: first, the technical parameters of the automatic centrifuge are limited; the current industrially widely used automatic centrifuges have rotor diameters of 1250mm and 1500mm, and the theoretical maximum processing capacity is A single batch is about 500kg, and the processing capacity is small. Secondly, the washing method is backward and the washing effect is poor; the washing method of the automatic centrifuge belongs to the displacement washing. When the thickness of the filter cake on the circumferential drum surface is thick, the washing liquid needs to be rinsed from the inside to the outside, and the washing time is long and the washing liquid is consumed. If the dosage is large, the material washing is not uniform. Third, the power consumption of a single machine is relatively large; the automatic centrifuge with a rotor diameter of 1250mm is equipped with a power of 22kW, and there is an alternation of acceleration and deceleration during the operation process, and the power consumption is large. Finally, the production characteristics of the ternary material itself lead to a lot of residual material; and the ternary material is produced batch by batch intermittently. After the previous batch is produced, the whole machine needs to be cleaned immediately to avoid the previous batch in the drum The residual material of the material affects the quality of the finished product of the subsequent batch of materials. The traditional cleaning operation requires personnel to open the machine cover, manual cleaning or even drilling into a semi-closed automatic centrifuge for cleaning, which is time-consuming and labor-intensive and has poor safety. At the same time, the cleaning effect Obviously not satisfactory. So, is it possible to develop a new type of integrated filtration equipment that can replace the traditional automatic centrifuge, so as to adapt to the large production scale of ternary materials, high water content and washing effect requirements, high particle crystal form requirements, and purity requirements? It can effectively guarantee its own production capacity and production efficiency, and simultaneously meet the green manufacturing characteristics of efficiency enhancement, energy saving, consumption reduction and emission reduction required by the current green manufacturing technical problems that need to be solved urgently.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a stirred tank filter with reasonable structure and high cost performance based on green manufacturing of ternary materials, which can adapt to the large production scale, water content and washing of ternary materials. It can effectively ensure its own production capacity and production efficiency, and simultaneously meet the efficiency enhancement, energy saving and consumption reduction required by current green manufacturing , Green manufacturing characteristics of emission reduction.

To achieve the above object, the present invention has adopted the following technical solutions:

A stirred tank filter based on green manufacturing of ternary materials, which is characterized in that it includes a tank body formed by axially abutting an upper shell and a lower base with each other, and a cavity formed by the cooperation of the upper shell and the lower base is used for forming In the washing chamber of the washing material, the lower base is provided with a filtering surface with a water filtering function, and the filtering surface separates the washing chamber to form a stirring chamber and a water filtering chamber located below the stirring chamber; the filter also includes a filter for injecting washing medium. The spraying component and the stirring component used to perform the stirring operation for the materials in the stirring chamber; the feeding pipe and the solid discharge pipe that communicate with the stirring chamber are arranged at the upper shell, and the water outlet pipe that communicates with the water filter chamber is arranged on the lower base. The upper shell and the lower base are locked with each other through the locking assembly, so that the tank has two working states of combination and disassembly: when the tank is in the assembled state, the upper shell and the lower base are locked by the locking assembly. They are locked to each other to form a tank body; when the tank body is in a disassembled state, the locking assembly is opened, and the lower base descends and disengages from the upper casing, thereby exposing the filter surface at the lower base and the residual filter cake on the filter surface.

Preferably, the locking assembly includes a coaxial locking ring that is rotatably fitted at the bottom edge of the upper casing, the lower annular surface of the locking ring extends vertically downward along the axial direction of the upper casing, and the locking ring The lower ring surface of the lower base is radially inwardly protruded with engaging teeth; the outer wall of the lower base is in the shape of a two-stage stepped shaft with a thin upper part and a thick lower part; The mating teeth are uniformly distributed in sequence along the circumferential direction of the lower base; in the circumferential direction of the locking ring, the distance between the adjacent occlusal teeth is greater than the width of the mating teeth, so that the mating teeth can pass through the gap between the occlusal teeth from bottom to top; When the tank body is in the assembled state, the bottom surface of the engaging teeth fits with the top surface of the matching teeth, so that the shaft shoulder of the lower base is tightly pressed against the bottom edge of the upper shell from bottom to top.

Preferably, the filter further includes a support assembly for holding the upper shell away from the base surface; the support assembly includes support legs uniformly distributed around the circumference of the upper shell, and the outer wall of the upper shell corresponds to the number of each support leg The support lugs are evenly distributed in the circumferential direction, and the top end of the bottom end of each support leg forms a fixed fit with the corresponding support lug; the support lug is hinged with the piston cylinder end of the hydraulic cylinder, and the piston rod end of the hydraulic cylinder extends vertically downward and A hinged fitting relationship is formed with the connecting lugs fixed at the lower base; the hydraulic cylinders are in more than two groups and are uniformly distributed in sequence along the circumferential direction of the lower base.

Preferably, the locking ring generates a rotary thrust through a power oil cylinder arranged at the upper casing; a rotation stop section extends vertically upward at the occlusal teeth, and a matching groove is recessed at the corresponding matching position of the upper casing; when the tank body is in the In the combined state, the anti-rotation segment is inserted into the matching groove.

Preferably, the inner ring surface of the locking ring is in the shape of a two-stage stepped hole with a thin upper part and a thick lower part, the bottom edge of the upper casing is arranged with a valance, and the upper surface of the valance is connected to the hole shoulder of the lock ring. A surface-fitted rotary fitting relationship is formed between them; the shape of the bite teeth is in the shape of a wedge-shaped block, and the tips of the bite teeth point to the locking rotation direction of the lower base.

Preferably, a moving wheel is arranged at the lower base; a track that can be matched when the moving wheel falls is laid at the base surface;

Preferably, the stirring assembly includes a stirring shaft arranged coaxially with the upper casing, the top of the stirring shaft penetrates the top surface of the upper casing and forms a dynamic cooperation with the power motor located above the upper casing, and the bottom end of the stirring shaft is provided with a stirring shaft blade; the stirring blade includes a front inclined plate, a rear inclined plate and a bottom plate extending radially outward from the stirring shaft, and the slope of the front inclined plate and the rear inclined plate decreases sequentially from the inside to the outside; the front inclined plate , The inner ends of the rear inclined plate and the bottom plate are fixed at the shaft body of the stirring shaft, and the outer ends of the front inclined plate, the rear inclined plate and the bottom plate are closed by the end plates, thereby forming the hollow triangular pyramid structure of the stirring blade; the bottom plate There is an included angle between the plane and the horizontal plane, and each stirring blade is axially symmetrically arranged along the circumferential direction of the stirring shaft.

Preferably, the front inclined plate of the stirring blade facing the stirring direction is provided with a plough blade which is convenient for cutting and turning the material, and the shape of the plough blade is an arc-shaped plate that extends downward and forward gently from the front inclined plate. Tile-shaped, each plough blade is evenly spaced on the front inclined plate along the radial direction of the stirring blade, and the travel paths of the plough blades on each stirring blade are staggered from each other; the bottom surface of the stirring shaft is also arranged with an intermediate blade, the middle The blade cooperates with the travel path of the plough blade on each stirring blade to form a complete circle.

Preferably, a diaphragm is arranged in the cavity of the stirring blade, and there is a matching gap between the front end of the diaphragm and the end plate, so that the cavity of the stirring blade is divided into only relying on the matching gap to communicate with each other. The heating inlet and the heating outlet are arranged in the stirring shaft, and the heating inlet and the heating outlet respectively communicate with the corresponding upper heating chamber and the lower heating chamber.

Preferably, the filter surface is a metal filter plate or filter cloth; the inlet of the solid discharge pipe is equal to or higher than the height of the filter surface.

The beneficial effects of the present invention are:

1) Abandoning the traditional centrifuge-type filtration structure with small processing capacity and low efficiency, and adopting a stirring tank-type filtration layout, so as to take advantage of the large-capacity one-time material processing characteristics of the stirring tank to adapt to the The technological requirements of high production scale, low water content and high washing effect of ternary materials. Specifically, in actual use, the ternary material first enters the stirring chamber through the feeding pipe, the spraying components such as nozzles spray the washing medium synchronously, and the stirring components such as stirring paddles and even stirring plates perform stirring operations. When the ternary material is washed and stirred, the generated washing waste liquid leaks down the filter surface to the water filter chamber, and is confluenced by the water outlet pipe. The completely washed ternary material is then discharged from the chamber through the solid discharge pipe, so as to reciprocate. In the above operation, each time a batch of ternary materials is washed, the chamber washing operation needs to be performed. At this time, due to the separable nature of the tank body, the locking assembly can be opened and the lower base or the upper shell can be removed to expose the filter surface on the lower base, and then the filter surface can be quickly and efficiently carried out. The removal operation of the residual filter cake at the inner wall of the tank and even at the inner wall of the tank is extremely convenient to use.

Obviously, it can be seen from the above that the present invention can adapt to the process requirements of large production scale of ternary materials, high water content and washing effect requirements, high particle crystal form requirements, high purity requirements, and high airtight operation requirements. It can also effectively ensure its own production capacity and production efficiency, and simultaneously meet the green manufacturing features of efficiency enhancement, energy saving, consumption reduction and emission reduction required by current green manufacturing; after using the above process of the present invention, its single-line production capacity is increased by 6-10 The production efficiency has been greatly improved from the original 400kg per batch to 2000-4000kg; at the same time, the production capacity of 10,000 tons reduces production wastewater by 200,000 tons; and the actual power consumption of the core equipment stirring tank filter is only 100% of the rated power. 1/2, greatly reducing power consumption. It is calculated that the energy consumption per 100kg of centrifugal equipment in the traditional process is about 5.5kW·h, and the energy consumption per 100kg of the agitating tank filter of the present invention is about 0.8-1kW·h. Calculated according to the annual production capacity of 10,000 tons, energy consumption can be saved Above 4.5×105kW·h, the effect is remarkable.

2) For the locking components, there are various locking methods: such as screwing, or inserting and locking with positioning pins or positioning columns, or even directly using the external force of the hydraulic cylinder group to ensure the The sealing function of the base against the upper casing, etc. As a further preferred solution of the present invention, the present invention adopts the rotation function of the locking ring, and utilizes the occlusion of the locking teeth at the locking ring relative to the matching teeth at the lower base, thereby ensuring the sealing and matching purpose of the lower base and the upper casing. The uncertainty of the fit of the relative positioning pin or the positioning pin insertion locking, the complicated operation of the thread screwing method, and the working instability of the force exerted by the pure hydraulic cylinder group, the locking ring locking structure of the present invention can ensure that the tank The coordination stability and certainty of the body in the combined state, and the convenience of operation is guaranteed simultaneously, serving multiple purposes with one stone.

3) In actual operation, the present invention should be kept away from the base surface such as the ground, so as to free up the activity space for the action of the lower base. The lower base is driven by a number of hydraulic cylinders evenly distributed in the circumferential direction to generate a mechanized controllable lifting action, so that when the lower base is separated from the upper casing, the stability, reliability and safety of the entire separation operation can always be guaranteed.

4) Since the calibration of the present invention is the function of large-capacity washing, filtering and drying, the quality of the entire tank is extremely heavy, and the lower base is no exception. This is one of the fundamental reasons why the lower base needs to be driven by a hydraulic cylinder. At the same time, the locking ring also needs to be driven by the power cylinder to ensure the rotation of the locking ring. Due to the integrated structure formed by the power cylinder between the locking ring and the upper casing, once the locking ring moves, it may drive the lower base to produce a follow-up deflection action under high friction, which needs to be avoided. Therefore, the present invention adopts the design of the anti-rotation section and the matching groove, so that once the lower base is inserted into the locking ring in the axial direction, the anti-rotation section at the lower base is naturally inserted into the matching groove of the upper casing to form the anti-rotation matching , so as to avoid the accidental follow-up rotation of the lower base.

5) Due to its huge structure, the locking ring can only be stuck on the valgus of the upper casing by its own gravity in actual operation. If necessary, the upper surface of the valgus can be raised with oil lubrication or grease lubrication. Lubricating effect between the bore shoulders of the locking ring. The special wedge-shaped shape of the occlusal teeth is for the purpose of facilitating the lower base to snap into the occlusal teeth of the locking ring more quickly, which will not be repeated here.

6) The design of the moving wheel and the track makes it convenient for the base surface to quickly receive the lower base during cleaning, and to free up more cleaning space by moving the lower base along the side of the track. The anti-deflection plate is to guide the travel path of the moving wheel.

7) As another bright spot of the present invention, the stirring assembly of the present invention adds a heating-type turning material and a propeller-type paddle structure on the basis of the conventional stirring structure of the stirring blade and the stirring shaft. Specifically, the stirring blade alone presents an open-ended triangular pyramid structure. On the one hand, the unique inclined surface of the stirring blade ensures the flipping washing of the ternary material and the pushing function from the inside to the outside, so as to improve the quality of the ternary material. The washing effect is guaranteed, and the slow-moving function of the ternary material to the solid discharge pipe is ensured. On the other hand, a diaphragm is arranged in the cavity of the stirring blade, so that the traditional stirring blade is changed to form a heating paddle, so that on the basis of the above washing and filtering functions of the present invention, the material after washing and filtering is realized. preheating function. The preheated material enters the next drying process through the solid discharge pipe, and its drying efficiency can be significantly improved.

Description of drawings

Fig. 1 is the working state schematic diagram of the present invention;

Fig. 2 is the sectional structure schematic diagram of the present invention when the tank body is in a combined state;

Figure 3 is a state diagram of the cooperation between the lower base and the base surface when the tank body is in a disassembled state;

Fig. 4 is a state diagram of the mating state of the turning stop segment and the mating groove;

Fig. 5 is a partial enlarged view of part I of Fig. 2;

Fig. 6 is the partial enlarged view of II part of Fig. 2;

Fig. 7 is the structural representation of stirring blade;

Fig. 8 is the left side view of Fig. 7;

FIG. 9 is a schematic diagram of the working state of the material switching valve.

The actual corresponding relationship between each label of the present invention and the name of the component is as follows:

10-Stirring and mixing equipment 20-Water washing kettle 30-Stirring tank filter

31-Upper shell 31a-Flange 32-Lower base

32a-filter surface 32b-connecting lug plate 32c-moving wheel 32d-hydraulic cylinder

33-Spraying component 34-Agitating component

34a-stirring shaft 34b-front inclined plate 34c-rear inclined plate 34d-bottom plate 34e-end plate

34f-plough blade 34g-intermediate blade 34h-diaphragm

34i-heating inlet 34j-heating outlet

35-Solid outlet pipe 36-Water outlet pipe 37-Lock assembly

37a-Lock ring 37b-Mating teeth 37c-Mating teeth

37d-anti-rotation section 37e-matching groove

38a-Support leg 38b-Support ear seat

39-track 39a-deflector

40-Tee conveying material pipe 50-Twin screw dryer 60-Material switching valve

Detailed ways

For ease of understanding, the specific structure and working mode of the present invention are further described below in conjunction with the overall production system and technology of the ternary material:

The production system based on ternary materials provided by the present invention is based on the stirring tank filter 30, and organically integrates the functions of airtight pressure filtration, stirring slurry washing, automatic rotary unloading, and self heating into the stirring tank. In the filter 30, the overall structure is compact and optimized, thereby effectively shortening the process flow. Based on the structure of the stirring tank filter 30, the front-end process is equipped with a high-efficiency water washing kettle 20 to fully disperse and react the materials; High-efficiency drying and no damage to the crystal form of the material, finally obtain high-quality ternary materials, and make the whole process have the characteristics of green manufacturing.

More specifically, the ternary material-based production system involved in the present invention, as shown in Figures 1-9, mainly consists of a stirring and mixing device 10, a water washing kettle 20, a stirring tank filter 30, a material switching valve 60, a double Screw dryer 50 and other components. in:

Mixing equipment

The stirring and mixing device 10 mainly mixes Ni, Co, Mn plasma mixture, pure water, lye, etc. The mixing speed, stirring paddle structure, baffles, etc. are the key factors affecting the mixing effect. The water washing kettle 20 is the equipment for uniform pulping and reaction of the mixed materials, and also the core equipment for obtaining the precursor.

The stirring and mixing device 10 usually includes a stirring tank. The size of the stirring tank, the type of agitator, the rotational speed, the number, type and size of baffles, and the position of feeding are all key factors affecting the reaction; similarly, the diameter of the stirring paddle, The quantity and type also need to be set according to the technical parameters such as the volume and diameter of the stirring and mixing equipment 10 . The baffles evenly arranged on the barrel wall of the stirring and mixing device 10 help to improve the mixing effect.

washing kettle

Before the material is filtered, pulped, washed and pre-dried in the stirring tank filter 30, a water washing kettle 20 for uniform pulping and reaction needs to be provided. As shown in Figure 1, the central position of the washing kettle 20 is provided with an anchor stirrer, which is provided with an anchor paddle, and the rotational speed is low, generally lower than 100r/min; the highest position of the anchor paddle must be below the liquid level. In order to prevent the anchor paddle from rubbing against the wall of the washing kettle 20, there is generally a certain safety distance of 10-20mm. The anchor paddle is also provided with several scrapers, and the scrapers are generally made of plastic such as Teflon. The distance between the scraper and the cylinder wall of the washing kettle 20 is small, which can be less than 5mm, which is used to prevent materials from gathering on the cylinder wall. In addition, the non-center position of the wall of the washing kettle 20, that is, the position to avoid the anchor stirrer, is also provided with a high-speed disperser. , which can be set according to technical parameters such as the volume, diameter, and rotation speed of the reactor. The high-speed disperser rotates at a relatively high speed, generally 1000 to 2000 r/min. Under the dual action of the anchor agitator and the high-speed disperser, the materials can be fully mixed to achieve the purpose of efficient pulping and reaction.

Stirring Tank Filter

The stirring tank filter 30 is the innovation point of the present invention, and it is also the core equipment of the whole system. Its function integrates various functions such as solid-liquid filtration, beating, washing, impurity removal, pre-drying, etc., which greatly shortens the process flow and efficiently realizes solid-liquid filtration. separation.

The specific structure of the stirring tank filter 30 is referred to Figures 2-8. Considering automation and intelligence, as well as being convenient for cleaning the residual filter cake, the entire stirring tank filter 30 is designed as a split structure, including the upper shell 31 and the filter. The tank body is formed by the abutment of the lower base 32 . In order to prevent metal elements such as iron, zinc and copper from entering the ternary material and affecting the quality of the product, the tank body and even the part in contact with the ternary material of the structure described below should be sprayed with tungsten carbide or other wear-resistant materials.

The outer wall of the lower base 32 is in the shape of a two-segment stepped shaft with a thin upper part and a thick lower part, so as to use the coaxial plug-fit of the small right-angle section of the lower base 32 to the bottom edge of the upper shell 31 to achieve the compatibility and sealing of the two. ; If necessary, a gasket as shown in Figure 6 can be added to improve the sealing cooperation between the two. When the lower base 32 is inserted into the upper casing 31 from bottom to top, the locking function of the locking assembly 37 is required to ensure the firmness of the cooperation between the lower base 32 and the upper casing 31 and the external sealing effect. As shown in Figure 2-3, the top surface of the lower base 32 is covered with a layer of filter surface 32a formed of a filter material such as a metal filter screen or filter cloth. Once the tank body is assembled and formed, the filter surface 32a naturally seals the tank body. The upper part of the cavity is a stirring cavity and the lower part is a double-layer cavity structure for a water filter cavity. At the same time, it can be seen in FIG. 2 that, in order to ensure the internal stirring effect of the tank, the stirring components 34 are arranged coaxially at the upper shell 31; A water outlet pipe 36 is arranged at the bottom of the base 32 to ensure the functions of feeding the ternary material and the washing medium and discharging the washing waste liquid. The solid discharge pipe 35 is arranged on the side of the upper casing 31 to facilitate discharging. The size of the solid discharge pipe 35 is determined according to process parameters such as cylinder volume and slag content. The solid discharge pipe 35 is connected with an automatic discharge valve, such as hydraulic automatic opening and closing plunger discharge valve or electric screw drive opening and closing plunger discharge valve, etc., in order to achieve the purpose of automatic discharge on demand; necessary At the time, by setting sensors and program interlocking, intelligence can also be realized.

In actual operation, as shown in Figures 2-5, the locking assembly 37 includes a locking ring 37a, the shape of the ring cavity of the locking ring 37a is a two-stage stepped hole shape with upper thin and lower thick, and the bottom of the lower casing is in the shape of a two-stage stepped hole. The outer flange 31a is arranged along the edge; during assembly, the locking ring 37a is coaxially sleeved on the outer wall of the lower casing, and the hole shoulder of the locking ring 37a is used to rotate in close contact with the top surface of the outer flange 31a Cooperate to achieve the purpose of rotating the locking ring 37a. Considering the huge mass of the locking ring 37a, if necessary, the two ends of the power cylinder can be hinged on the outer wall of the housing 31 and the locking ring 37a respectively, so as to use the hydraulic pressure of the power cylinder to ensure the circumferential force on the locking ring 37a Apply function. The inner wall of the large-diameter section of the locking ring 37a is surrounded by a plurality of occlusal teeth 37b, and for the lower base 32, as shown in Figure 3-4, the outer wall of the large-diameter section of the lower base 32 is axially evenly distributed. Several mating teeth 37c.

When the tank body needs to be combined, first lift the lower base 32 and insert it into the upper casing 31 coaxially. After that, driven by the hydraulic pressure of the power cylinder, the locking ring 37a rotates and drives the engaging teeth 37b to rotate, thereby locking or releasing with the matching teeth 37c. 2 is an implementation, that is, when the locking ring 37a rotates clockwise, the matching teeth 37c and the engaging teeth 37b are engaged and locked with each other; otherwise, the matching teeth 37c and the engaging teeth 37b are released and disengaged. In order to prevent the lower base 32 from spinning under the action of the meshing frictional force of the occlusal teeth 37b during the meshing process, resulting in meshing failure, among the several mating teeth 37c evenly distributed on the outer circumference of the lower base 32, a uniform distribution can be selected. Two or more mating teeth 37c serve as anti-rotation teeth. In other words, the anti-rotation teeth should extend vertically upward to form the anti-rotation section 37d as shown in FIG. 4 , and the upper casing 31 is correspondingly arranged and milled to form a matching groove 37e that matches the anti-rotation section 37d to form a matching keyway and key. Anti-rotation matching structure. Because the upper casing 31 is fixed, the rotation-preventing section 37d at the anti-rotation tooth cooperates with the matching groove 37e, the freedom degree of the lower base 32 in the circumferential direction is eliminated, and no rotation occurs during the meshing process.

Through the automatic opening and closing technology of the large-diameter cylinder hydraulic toothed cylinder flange, the present invention can realize the automatic opening and closing operation of a full range of hydraulic toothed cylinder flanges with a diameter of 2000mm to 3200mm, and the effect is remarkable.

Further, during the engagement and rotation, the corresponding surfaces at the shoulder of the locking ring 37a and the outer flange 31a of the upper casing 31 are force-bearing surfaces that interact with each other. When the engaging teeth 37b and the engaging teeth 37c are engaged and locked with each other, the pressure generated by them will be transmitted to the upper casing 31 through the locking ring 37a, and finally transmitted to the base surface through the support ears 38b and the support legs 38a. In order to ensure that the locking ring 37a rotates smoothly during the locking process, an oil groove is arranged at the shoulder of the locking ring 37a. When in use, an appropriate amount of grease can be added to the oil groove through the oiling hole for lubrication; An appropriate amount of graphite and other lubricating materials are embedded in the hole shoulder of the locking ring 37a, which can also play a lubricating function.

Further, in order to realize automation and intelligence, as shown in FIG. 2, a weight sensor can be set between the support ear seat 38b and the support leg 38a of the upper casing 31, and the weight sensor and the program can calculate and automatically according to the material weight, Add washing liquid in proportion to realize intelligence. The supporting ear seats 38b are generally provided in two or three and are evenly distributed. At the same time, as shown in FIG. 2 , the lower base 32 and the support lug 38b are connected to each other by a hydraulic cylinder 32d; the piston cylinder end of the hydraulic cylinder 32d is hinged to the bottom surface of the support lug 38b, and the piston rod end of the hydraulic cylinder 32d is hinged to the bottom surface of the support lug 38b. At the connection lug plate 32b, the connection lug plate 32b is then fixedly connected to the lower base 32, so that the lower base 32 has a vertical mechanical lifting function through the vertical telescopic function of the hydraulic cylinder 32d.

In addition, the bottom of the lower base 32 is also provided with moving wheels 32c. The moving wheels 32c should be set to four. Generally, the two in the front row are universal wheels for guiding, and the two in the rear are fixed wheels. In order to prevent the lower base 32 from being moved, the guide is difficult to control, causing collision and damage to the equipment, and also to prevent the lower base 32 from being heavy and causing damage to the base surface. Generally, a corresponding rail 39 needs to be provided at the base surface. When the locking assembly 37 is released, and the lower base 32 is driven down by the hydraulic cylinder 32d, the moving wheel 32c directly enters the track 39, and the movement is convenient and the direction is fixed. In order to prevent deviation, the outer side of the track 39 can be provided with a deviation prevention plate 39a as shown in FIG. 3 , and the height of the deviation prevention plate 39a is slightly shorter than the diameter of the moving wheel 32c. The track 39 is generally a steel plate, which reduces friction, facilitates the movement of the lower base 32, and protects the paint surface of the epoxy floor in the factory area.

Further, in order to reduce the power consumption of the stirring tank filter 30 and realize green energy saving, the present invention also improves the structure of the stirring assembly 34 . On the basis of retaining the structure of the stirring blade, stirring shaft 34a and power motor of the traditional stirring assembly 34, the present invention designs the stirring blade as a hollow triangular pyramid frustum structure, so as to achieve lightweight, self-heating, self-turning and self-propelling materials. multiple purposes.

Specifically, as shown in FIG. 2 and FIGS. 7-8 , in actual design, the stirring blades can be designed into two groups and arranged axially symmetrically along the stirring shaft 34a. The two groups of stirring blades have the same size, the two sides are balanced, and the working force is more balanced. Taking the stirring blade on one side as an example, the front inclined plate 34b, the rear inclined plate 34c, the bottom plate 34d and the end plate 34e form a hollow cavity structure with a triangular cross-section. The cross-section of the triangular hollow cavity of the stirring blade decreases with a certain slope from the center to the outside. It extends at the truncated cone and finally forms a triangular pyramid frustum structure similar to a truncated cone. On the cross section of the stirring blade, since the shape of the front inclined plate 34b and the rear inclined plate 34c are consistent and symmetrical, the cross section presents an isosceles or even an equilateral triangle shape; at the same time, the angle α between the bottom plate 34d and the horizontal plane is generally 7～ 12°, so as to avoid friction between the entire plane of the bottom plate 34d and the material. In actual scraping, only the blade of the plough blade cuts into the filter cake, which is in linear contact, and the damage to the filter cake crystal is small; and the plough blade 34f is arranged in multiple pieces and at intervals, which also reduces the squeeze on the filter cake. The pressure is beneficial to maintain the crystal form, thereby avoiding the unfavorable conditions that destroy the crystal shape and consume power. It is precisely because the cross-section of the triangular hollow cavity of the stirring blade is reduced from the center to the outside at a certain slope, which makes the entire blade rotate, it will generate a thrust outward, and the material will be pushed out from the center until it slowly emerges from the solid. The feed tube 35 is discharged. The front inclined plate 34b of each stirring blade is also intermittently welded with plow blades 34f. It can be seen from FIG. 6 that the traces of the circles drawn by the respective plow blades 34f are staggered with each other, that is, they do not interfere with each other. The bottom surface of the mounting seat of the stirring shaft 34a is also provided with an intermediate blade 34g, which is used for scraping off the material directly below the stirring shaft 34a that cannot be scraped by the plow blade 34f. In the top view direction, the locus of the circle drawn by each plough blade 34f, combined with the rotation locus of the middle blade 34g, should cooperate with each other to form a complete circle so as to cover the entire filter surface 32a of the mixing tank filter 30. The arc-shaped tile-shaped coulter design of the plough blade 34f is also more convenient for cutting and turning the material.

On the basis of the above-mentioned lightweight, self-turning and self-propelling structures of the stirring blade, the stirring blade also has a self-heating function. Specifically, also taking the stirring blade on one side as an example, the triangular hollow cavity of the stirring blade is also welded with a diaphragm 34h, which not only strengthens the strength of the hollow cavity and enables the stirring blade to withstand the filtration pressure, but also adds a triangular shape to the hollow cavity. The hollow cavity is divided into an upper heating cavity and a lower heating cavity. It can be seen in FIG. 6 that a matching gap is left between the stirring blade and the end plate 34e, so that the upper heating chamber and the lower heating chamber communicate with each other. The upper heating chamber communicates with the heating inlet 34i at the stirring shaft 34a, and the lower heating chamber communicates with the heating outlet 34j at the stirring shaft 34a. In the pre-drying stage of the ternary material, a heat source such as steam can be introduced into the center of the stirring shaft 34a, enter through the heating inlet 34i, reach the lower heating chamber through the upper heating chamber and the matching gap, and finally be discharged from the heating outlet 34j to form a heat exchange path. The same is true for the stirring blade on the other side. In this way, the stirring blade can carry the heat source to pre-dry the ternary material directly, and during the drying process, the stirring blade can also rotate and turn the material over, which makes the heat transfer efficiency higher and the heating process of the ternary material more uniform. .

Twin Screw Dryer

The twin-screw dryer 50 is a low-shear, high-efficiency drying equipment. The twin-screw dryer 50 can revolve and rotate at a low speed, and has a good mixing effect, but the stirring intensity is low and the shearing force is weak, which can ensure the integrity of the crystal form of the material. product quality. Because the material drying cycle is long, in order to ensure the matching of the process, a material switching valve 60 is generally set between the stirring tank filter 30 and the twin-screw dryer 50, and the material switching valve 60 is automatically switched to make one stirring tank filter. The machine 30 is matched with two twin-screw dryers 50, so that the process time can be matched with each other.

As shown in Figure 9, in the actual design, the material switching valve 60 is provided with the joint of the three-way material conveying pipe 40, and the deflection of the valve plate is controlled by the air cylinder, so that the material can be quickly moved between the two groups of outlet pipes at the three-way conveying pipe 40. toggle function. The deflection position of the valve plate is sensed by the sensor, and according to the signal, it can be known which outlet pipe and the twin-screw dryer 50 the current material enters. In order to prevent the material from accumulating in the upper space of the valve plate, nozzles can be arranged on the circumference of the upper space of the valve plate, and the compressed air can be used to blow away regularly to prevent the material from being aggregated. If the length of the outlet pipe is long, an air hammer can be set outside it, and the outlet pipe can be vibrated regularly to prevent aggregates. Similarly, in order to prevent metal elements such as iron, zinc, copper and other metal elements from entering the ternary material and affecting product quality, the part of the tee transport material pipe 40 in contact with the material needs to be sprayed with tungsten carbide or other wear-resistant materials.

After the material is filtered, beaten, washed and pre-dried in the stirring tank filter 30, it is output from the automatic discharge valve, and falls into the corresponding twin-screw dryer 50 through the three-way conveying pipe 40. The twin-screw dryer 50 can be fed with a heat source, and under the dual action of the twin-screw revolution and rotation, the material and the heat source are fully mixed and dried. In order to improve the drying efficiency, the upper part of the head of the twin-screw dryer 50 is provided with a vacuum port, which can speed up the drying process by vacuuming. In order to prevent the material from being sucked away, a dust collector can also be provided at the twin-screw dryer 50 with a filter element inside. The number, material and precision of filter elements are determined according to actual needs. There is a vacuum port on the upper part of the dust collector. During vacuuming, if the material dust is sucked, it will be trapped by the filter element on the outer filter surface of the filter element. After vacuuming, backflushing can be carried out through the set backflushing port to blow the material dust trapped on the outer filter surface of the filter element into the twin-screw dryer 50. The filter element can also be set so that the material dust is trapped on the inner filter surface of the filter element when the vacuum is evacuated, which can be determined according to the structure type of the filter element.

During the specific operation, in order to make the solid discharge conveyance of the stirring tank filter 30 smooth, the stirring tank filter 30 is generally set upstairs or on the platform to make it have a certain height; while the twin-screw dryer 50 is provided with corresponding The low position is connected to the material switching valve 60 through the three-way transport material pipe 40. In this way, the solid discharge of the stirring tank filter 30 can freely fall by gravity, and the conveying method is relatively reliable.

In order to facilitate further understanding of the green manufacturing system to which the present invention belongs, the specific usage of the present invention is further described below in conjunction with the following production processes:

1), the NiSO ₄ , MnSO ₄ , CoSO ₄ ternary materials are fully stirred and mixed with pure water in a set ratio, such as 5:2:3, etc. in the stirring and mixing device 10 to form a ternary material salt solution; at this time , the solution concentration is controlled at about 20-40%, and the solution density is controlled at 1.1-1.4.

2), the ternary material salt solution is passed through the pump, and is sent into the washing kettle 20 by the stirring and mixing device 10, and simultaneously dilute lye, complexing agent, coating agent and pure water are added to carry out complexation reaction and ageing. The pH value is controlled at 11±2, the reaction temperature is kept at 60°C, the reaction time is less than or equal to 1h, and the particle diameter is controlled at 5μm. In order to ensure the above process requirements, the stirring speed of the main shaft of the washing kettle 20 is 0~40rpm, usually 30rpm; the speed of the side paddle is 0~600; quality.

3) After aging, the concentration of the ternary material slurry is controlled at 35-50%, the particle diameter distribution is D ₅₀ =8-12 μm, and D ₀ ≥ 1 μm; then enter the stirring tank filter 30, add dry powder, and use Pure water and dilute alkaline solution are used for slurry washing; after washing, the moisture content of the filter cake is less than 7%, the operation period is less than 2.5h, the solid content of the mother liquor is less than 0.1%, and the flatness of the filter cake is less than 10% of the thickness of the filter cake.

4), filter and wash the filter cake, enter the twin-screw dryer 50 through the solid discharge pipe 35 to implement drying treatment, and the crystal form retention rate of the ternary material is greater than 96% at this time, thereby obtaining high-quality ternary material finished product.

Practice has proved that after the above-mentioned design system of the present invention is adopted, the single-line production capacity is increased by 6 to 10 times, from the original 400kg per batch to 2000 to 4000kg, and the production efficiency is greatly improved; at the same time, the production capacity of 10,000 tons reduces production wastewater by 20%. tons. Among them, the multi-functional integration concept in the process of the present invention organically unifies the pulping, washing, filtering, pre-drying, and drying sections, has good adaptability to ternary materials, and has large processing capacity, shortening the process flow and shortening the time. The washing time, the consumption of washing liquid are less, and the production waste water produced is less, which obviously meets the requirements of green manufacturing characteristics of efficiency enhancement, energy saving, consumption reduction and emission reduction of current green manufacturing.

The core equipment of the whole process of the present invention is the stirring tank filter 30, the maximum diameter of which can be 3600mm in technical parameters, and the effective filtering surface 32a area is 10m ² . The locking component 37, that is, the automatic opening and closing technology of the hydraulic toothed mesh, provides a device basis for the automatic realization of the filter, and the unloading time and the opening and closing time of the cylinder are greatly shortened. According to estimates, the opening and closing method of the stirring tank filter 30 with a diameter of 3200 mm of the present invention can save more than 50 minutes of time compared with the traditional integral type and the bolt quick-opening type, as shown in the following table:

Table 1 Comparison table of connection methods of filter cylinder

To sum up, the technical characteristics of the device and process of the present invention adapt to the large production scale of ternary materials, high requirements for water content and washing effect, high requirements for particle crystal form, high requirements for purity, high requirements for closed operation, and high production capacity. It can be increased by 6 to 10 times, and the production efficiency is improved. The actual power consumption of the core equipment stirring tank filter 30 is only 1/2 of the rated power, which greatly reduces the power consumption. It is calculated that the energy consumption per 100kg of the centrifugal equipment in the traditional process is about 5.5kW·h, while the energy consumption of the stirring tank filter 30 per 100kg is about 0.8-1kW·h. Calculated based on the annual production capacity of 10,000 tons, the energy consumption can be saved by 4.5%. ×105kW·h or more. Compared with the existing ternary material production device and production process, the device and process of the present invention are significantly improved in terms of efficiency enhancement, consumption reduction, emission reduction, automation, and process simplification, and conform to the characteristics of green manufacturing.

Claims (10)

1. The utility model provides a stirred-tank filter based on green manufacturing of ternary material which characterized in that: the washing machine comprises a tank body formed by axially combining an upper shell (31) and a lower base (32), wherein a cavity formed by matching the upper shell (31) and the lower base (32) forms a washing cavity for washing materials, a filtering surface (32a) with a water filtering function is arranged at the lower base (32), and the washing cavity is divided by the filtering surface (32a) to form a stirring cavity and a water filtering cavity positioned below the stirring cavity; the filter also comprises a spraying component (33) for injecting washing media and a stirring component (34) for stirring materials in the stirring cavity; a feed pipe and a solid discharge pipe (35) communicated with the stirring cavity are arranged at the upper shell (31), and a water outlet pipe (36) communicated with the water filtering cavity is arranged at the lower base (32); the upper shell (31) and the lower base (32) are locked with each other through a locking assembly (37), so that the tank body has two working states of combination and disassembly: when the can body is in an assembled state, the upper shell (31) and the lower base (32) are locked with each other through a locking assembly (37) to form the can body; when the tank is in a disassembled state, the locking assembly (37) is opened, the lower base (32) descends and is separated from the upper shell (31), and therefore the filtering surface (32a) at the lower base (32) and residual filter cakes on the filtering surface (32a) are exposed.

2. The stirred tank filter based on green manufacturing of ternary materials as claimed in claim 1, characterized in that: the locking assembly (37) comprises a locking ring (37a) which is coaxially and rotatably matched with the bottom edge of the upper shell (31), the lower annular surface of the locking ring (37a) axially extends downwards along the upper shell (31) in a vertical mode, and meshing teeth (37b) are arranged on the lower annular surface of the locking ring (37a) in a radially inward protruding mode; the outer wall of the lower base (32) is in a two-section stepped shaft shape with a thin upper part and a thick lower part, the outer wall of the large-diameter section of the lower base (32) is radially and convexly provided with matching teeth (37c), and the matching teeth (37c) are sequentially and uniformly distributed along the circumferential direction of the lower base (32); in the circumferential direction of the locking ring (37a), the distance between every two adjacent meshing teeth (37b) is larger than the width of the matching teeth (37c), so that the matching teeth (37c) can penetrate through the gaps between every two adjacent meshing teeth (37b) from bottom to top; when the tank body is in a combined state, the bottom surface seam allowance of the meshing tooth (37b) is matched with the top surface of the matching tooth (37c), so that the shaft shoulder of the lower base (32) is tightly pressed on the bottom edge of the upper shell (31) from bottom to top in a sealing manner.

3. The stirred tank filter based on green manufacturing of ternary materials as claimed in claim 2, characterized in that: the filter also comprises a support assembly for supporting the upper housing (31) from a base surface; the supporting assembly comprises supporting legs (38a) which are uniformly distributed along the circumferential direction of the upper shell (31), supporting lug seats (38b) are uniformly distributed on the outer wall of the upper shell (31) in the circumferential direction corresponding to the number of the supporting legs (38a), and the top ends of the bottom ends of the supporting legs (38a) are fixedly connected with the corresponding supporting lug seats (38 b); the piston cylinder end of a hydraulic cylinder (32d) is hinged at the supporting lug seat (38b), and the piston rod end of the hydraulic cylinder (32d) vertically extends downwards and forms a hinged fit relation with a connecting lug plate (32b) fixed at the lower base (32); more than two groups of hydraulic cylinders (32d) are sequentially and uniformly distributed along the circumferential direction of the lower base (32).

4. The stirred tank filter based on green manufacturing of ternary materials as in claim 3, characterized in that: the locking ring (37a) generates a rotary thrust by a power cylinder disposed at the upper housing (31); a rotation stopping section (37d) vertically extends upwards from the position of the meshing tooth (37b), and a matching groove (37e) is concavely arranged at the corresponding matching position of the upper shell (31); when the can body is in the combined state, the rotation stopping section (37d) is inserted into the matching groove (37 e).

5. The stirred tank filter based on green manufacturing of ternary materials as in claim 4, wherein: the inner ring surface of the locking ring (37a) is in a two-section stepped hole shape with a thin upper part and a thick lower part, the bottom edge of the upper shell (31) is provided with an outward flange (31a), and the upper surface of the outward flange (31a) and the hole shoulder of the locking ring (37a) form a surface-fitting type rotary fit relation; the shape of the meshing tooth (37b) is wedge-shaped block, and the tip of the meshing tooth (37b) points to the locking rotation direction of the lower base (32).

6. A stirred-tank filter based on green manufacture of ternary materials according to claim 3 or 4 or 5, characterized in that: a moving wheel (32c) is arranged at the lower base (32); a track (39) matched with the movable wheel (32c) when falling is laid on the base surface; an anti-deviation protection plate (39a) for preventing the moving wheel (32c) from deviating is arranged on the outer side of the track (39).

7. A stirred-tank filter based on green manufacture of ternary materials, according to claim 1 or 2 or 3 or 4 or 5, characterized in that: the stirring assembly (34) comprises a stirring shaft (34a) which is coaxial with the upper shell (31), the top end of the stirring shaft (34a) penetrates through the top surface of the upper shell (31) and forms power fit with a power motor positioned above the upper shell (31), and the bottom end of the stirring shaft (34a) is provided with a stirring blade; the stirring blade comprises a front inclined plate (34b), a rear inclined plate (34c) and a bottom plate (34d), wherein the front inclined plate (34b), the rear inclined plate (34c) and the bottom plate (34d) extend outwards from the radial direction of the stirring shaft (34a), and the slope of the surfaces of the front inclined plate (34b) and the rear inclined plate (34c) is sequentially reduced from inside to outside; the inner ends of the front inclined plate (34b), the rear inclined plate (34c) and the bottom plate (34d) are fixed at the shaft body of the stirring shaft (34a), and the outer ends of the front inclined plate (34b), the rear inclined plate (34c) and the bottom plate (34d) are sealed by an end plate (34e), so that a hollow triangular pyramid structure of the stirring blade is formed; an included angle is reserved between the surface of the bottom plate (34d) and the horizontal plane, and the stirring blades are axially symmetrically arranged along the circumferential direction of the stirring shaft (34 a).

8. The stirred tank filter based on green manufacturing of ternary materials as claimed in claim 7, characterized in that: the front inclined plate (34b) facing the stirring direction of the stirring blades is provided with plough blades (34f) convenient for cutting and turning materials, the appearance of each plough blade (34f) is in an arc-plate tile shape which is gently extended forwards from the surface of the front inclined plate (34b), the plough blades (34f) are uniformly distributed on the front inclined plate (34b) at intervals along the radial direction of the stirring blades, and the advancing paths of the plough blades (34f) on the stirring blades are staggered with each other; and an intermediate blade (34g) is further arranged at the bottom surface of the stirring shaft (34a), and the intermediate blade (34g) and the traveling path of the plough blade (34f) on each stirring blade are matched together to form a complete circle.

9. The stirred tank filter based on green manufacturing of ternary materials as claimed in claim 7, characterized in that: a transverse partition plate (34h) is arranged in the cavity of the stirring blade, and a matching gap is reserved between the front end of the transverse partition plate (34h) and an end plate (34e), so that the cavity of the stirring blade is divided into an upper heating cavity and a lower heating cavity which are communicated with each other only by means of the matching gap; the stirring shaft (34a) is internally provided with a heating inlet (34i) and a heating outlet (34j), and the heating inlet (34i) and the heating outlet (34j) are respectively communicated with the corresponding upper heating cavity and the corresponding lower heating cavity.

10. A stirred-tank filter based on green manufacture of ternary materials, according to claim 1 or 2 or 3 or 4 or 5, characterized in that: the filtering surface (32a) is a metal filtering plate or a filtering cloth; the inlet of the solids outlet pipe (35) is equal to or higher than the height of the filter surface.

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