CN218944556U

CN218944556U - A filter enrichment facility for coprecipitation reaction system

Info

Publication number: CN218944556U
Application number: CN202221630864.8U
Authority: CN
Inventors: 何志; 赵聪; 杨光耀; 何劲松; 康彬
Original assignee: Sichuan Sidaneng Environmental Protection Technology Co ltd; Chengdu Stareng Environmental Protection Equipment Co ltd
Current assignee: Sichuan Sidaneng Environmental Protection Technology Co ltd; Chengdu Stareng Environmental Protection Equipment Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2023-05-02
Anticipated expiration: 2032-06-27

Abstract

The utility model discloses a filtering and concentrating device for a coprecipitation reaction system, which aims to solve the technical problem that the reaction is influenced due to the fact that the size of a filtering and concentrating device is large. A filtration concentration unit for a filtration concentration device of a coprecipitation reaction system comprises a filtration concentrator in which, if a plane perpendicular to a central axis of a housing of the filtration concentrator and intersecting a filtration surface of a filter element is a cross section, then: the clear liquid cavity is distributed in the form of a first pattern on the cross section, the first pattern is a closed pattern, the shape of the closed pattern is a circle or polygon, the area except the first pattern on the cross section, which is positioned in the shell of the filter concentrator, is basically composed of a second pattern and a third pattern, the raw liquid cavity is distributed in the form of the second pattern, the filter material of the filter element is distributed in the form of the third pattern, and the first pattern is distributed in an array on the cross section.

Description

A filter enrichment facility for coprecipitation reaction system

Technical Field

Embodiments of the present application relate to coprecipitation reaction systems. The coprecipitation reaction system is suitable for preparing the precursor of the positive electrode material of the lithium ion secondary battery, and is particularly suitable for preparing the ternary precursor.

Background

The chemical coprecipitation method is widely applied to liquid phase chemical synthesis of powder materials, and is generally to add a proper precipitant into a raw material solution to enable components which are uniformly mixed in the solution to be precipitated together according to a stoichiometric ratio, or to react and precipitate an intermediate product in the solution, and then to calcine and decompose the intermediate product to prepare a target product. The process can regulate granularity and morphology of the product according to experimental conditions, and the effective components in the product can be uniformly mixed at atomic and molecular levels.

At present, the preparation of the ternary precursor of the positive electrode material of the lithium ion secondary battery is an important application of a chemical coprecipitation method in new energy industry. In the preparation process, nickel sulfate (or nickel chloride), cobalt sulfate (or cobalt chloride) and manganese sulfate (or manganese chloride) are prepared into mixed salt solution with a certain molar concentration, sodium hydroxide is prepared into alkali solution with a certain molar concentration, ammonia water with a certain concentration is used as a complexing agent, then the mixed salt solution, the alkali solution and the complexing agent are added into a reaction kettle at a certain flow rate, the stirring rate of the reaction kettle is controlled, the temperature and the pH value of reaction slurry, the reaction atmosphere (the reaction process is generally required to be completed under the protection of nitrogen at present) and the like, so that salt and alkali are subjected to neutralization reaction to generate ternary precursor crystal nuclei and grow gradually, and after the granularity reaches a preset value, a reaction product is filtered, washed and dried to obtain the ternary precursor. It can be seen that the process parameters to be controlled in the reaction process are more, and mainly include: the concentration of the salt and the ammonia water, the rate of adding the salt solution and the alkali solution into the reaction kettle, the reaction temperature, the pH value of the reaction process, the stirring rate, the reaction time, the solid content of the reaction slurry, the reaction atmosphere and the like. And after the preparation of the ternary precursor is finished, uniformly mixing the ternary precursor with a lithium source according to a certain proportion, calcining, crushing, grading and drying the cooled material to obtain the lithium ion secondary battery anode material.

In order to facilitate production, a filtering concentrator is arranged beside the reaction kettle at present, and the out-kettle concentration is implemented. In the operation process of the reaction kettle, along with the addition of reaction raw materials (salt solution, alkali solution and ammonia water) into the reaction kettle, part of reaction slurry in the reaction kettle enters a filter concentrator, a filter element is arranged in the filter concentrator and is provided with a stirring structure, clear liquid can be output from the filter concentrator after the reaction slurry is filtered through the filter element, the clear liquid can be reused as mother liquor for reaction, and concentrated liquid in the filter concentrator returns to the reaction kettle through a concentrated slurry reflux structure. The stirring structure in the filter concentrator generally comprises a main shaft positioned in the filter concentrator and a stirring paddle arranged on the main shaft, wherein the main shaft is driven by a motor outside the filter concentrator, filter elements are arranged at the periphery of the stirring paddle at intervals, and when the stirring paddle rotates, slurry can be stirred, so that particles in the slurry are prevented from settling, and the filter cake forming time on the filter elements is prolonged. However, the internal structural design of the filtering concentrator leads to larger volume of the filtering concentrator, so that the residence time of the reaction slurry in the filtering concentrator outside the reaction kettle body is longer, the reaction process is influenced by various process parameters, and the reaction is influenced once the environment changes, so that the consistency of the particle sizes of the reaction and the ternary precursor is influenced when the residence time of the slurry in the filtering concentrator is longer.

Aiming at the problems brought by the independent deployment of the filter concentrator, one solution is to cancel the filter concentrator and directly install the filter element in the reaction kettle, and the reaction kettle can be called as a coprecipitation reaction and filter concentration integrated device. Because the reaction and the filtration concentration are carried out in the coprecipitation reaction and filtration concentration integrated equipment, the reaction slurry is always in the same environment, and the influence of the independent deployment of the filtration concentrator on the reaction is avoided. However, it should be noted that: the coprecipitation reaction and filtration concentration integrated equipment has higher requirement on the stability of preventing the breakage of the filter element. Because if the material breaks down once the cartridge, the material that falls off the cartridge is mixed into the reaction slurry, resulting in contamination of the reaction slurry.

On the other hand, no matter the coprecipitation reaction system with a filter concentrator is arranged independently or the coprecipitation reaction system with the integrated device of coprecipitation reaction and filter concentration is adopted, the clear liquid filtered by the filter element is output through a clear-out system. At present, the clearing system mainly comprises a plurality of parts such as a pipeline, a valve, a backflushing device and the like, wherein the parts are temporarily installed on site along with the site installation of the filtration concentrator or the coprecipitation reaction and filtration concentration integrated equipment, so that the construction strength is high, the construction time is long, and the project construction progress is influenced.

Disclosure of Invention

The embodiment of the application provides a coprecipitation reaction system and a filtering and concentrating device for the coprecipitation reaction system, so as to solve the technical problem that the volume of a filtering and concentrating device is large to influence the reaction.

According to one aspect of the present application, a coprecipitation reaction system is provided. Comprising the following steps: the device comprises a coprecipitation reaction unit, wherein the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry reflux structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry reflux structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; the filtering and concentrating unit comprises a filtering and concentrating device, the filtering and concentrating device is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear liquid cavity in the shell of the filtering and concentrating device, a slurry feeding structure to be concentrated, a slurry discharging structure to be concentrated and a clear liquid discharging structure are respectively arranged on the shell of the filtering and concentrating device, the slurry feeding structure to be concentrated and the slurry discharging structure to be concentrated are respectively communicated with the stock solution cavity, and the clear liquid discharging structure is communicated with the clear liquid cavity; the slurry discharging structure to be concentrated is used for being connected with the slurry feeding structure to be concentrated, the concentrated slurry discharging structure is used for being connected with the concentrated slurry reflux structure, the raw material feeding structure is used for being connected with the coprecipitation reaction raw material supply equipment, and the clear liquid discharging structure is used for being connected with the clear liquid discharging system; in the filter concentrator, the filter element is provided with a first edge and a second edge which are perpendicular to each other, the area of the filtering surface of the filter element is basically determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of the central axis of the shell of the filter concentrator, and the slurry feeding structure to be concentrated and the concentrated slurry discharging structure are respectively arranged on the parts of the shell of the filter concentrator, which are positioned at the two ends in the direction of the central axis, and are respectively communicated with the two ends of the stock solution cavity; if a plane perpendicular to the central axis and intersecting the filter face of the cartridge is taken as a cross-section, then: on the cross section, the clear liquid cavities are distributed in the form of a first pattern, the first pattern is a closed pattern, the shape of the closed pattern is a circle or a polygon, the area which is positioned in the shell of the filter concentrator and is except for the first pattern on the cross section is basically composed of a second pattern and a third pattern, the stock solution cavities are distributed in the form of the second pattern, the filter material of the filter element is distributed in the form of the third pattern, and the first pattern is distributed in an array on the cross section.

Optionally, the shell of the filter concentrator is provided with a vertical cylinder, and the vertical cylinder is divided into an upper cylinder, a middle cylinder and a lower cylinder which are sequentially communicated from top to bottom; the upper cylinder body is respectively provided with the slurry feeding structure to be concentrated and the clear liquid discharging structure, the clear liquid discharging structure is respectively connected with the upper ports of the filter elements through a pipe outlet tube arranged in the upper cylinder body, and the slurry discharging structure to be concentrated is connected with the slurry feeding structure to be concentrated through a feed pump; a filter element mounting structure is arranged in the middle cylinder body, and the filter element is mounted in the middle cylinder body through the filter element mounting structure; the lower cylinder is respectively provided with a concentrated slurry discharging structure and a hydraulic stirring reflux structure, the concentrated slurry discharging structure is connected with the hydraulic stirring reflux structure through a hydraulic stirring pump to form a hydraulic stirring circulation loop, and the hydraulic stirring circulation loop is connected with the concentrated slurry reflux structure through a concentrated slurry reflux branch.

Optionally, the lower cylinder body further comprises a bottom conical structure, the diameter of the bottom conical structure is gradually reduced from top to bottom, and the lower end of the bottom conical structure is provided with the hydraulic stirring backflow structure.

Optionally, when the coprecipitation reaction system is operated, the liquid level in the upper cylinder is controlled within a set range, so that the liquid level in the upper cylinder is lower than the top of the upper cylinder, and a cavity is formed; and the top of the upper cylinder body is provided with an exhaust structure communicated with the cavity. Alternatively, the exhaust structure may be connected to a vapor-liquid mixed phase input structure of a vapor-liquid separator.

Optionally, the height of the concentrated slurry discharging structure is higher than that of the hydraulic stirring reflux structure; in the hydraulic stirring circulation loop, the feeding end of the hydraulic stirring pump is connected with the concentrated slurry discharging structure, and the discharging end is connected with the hydraulic stirring reflux structure; one end of the concentrated slurry reflux branch is connected to a pipeline between the concentrated slurry discharging structure and the feeding end of the hydraulic stirring pump, or one end of the concentrated slurry reflux branch is connected to a pipeline between the hydraulic stirring reflux structure and the discharging end of the hydraulic stirring pump.

Optionally, the outer edge of the second pattern forms a circular edge, and the first pattern is circular; the first patterns are arranged in the round edge to form a plurality of horizontal and transverse interval first pattern columns, each horizontal and transverse interval first pattern column consists of a plurality of first patterns which are horizontally and transversely spaced, and adjacent horizontal and transverse interval first pattern columns are horizontally and longitudinally spaced; the first patterns in one horizontal transverse interval first pattern column and the first patterns in the other horizontal transverse interval first pattern column are staggered along the horizontal transverse direction; in the circular edge, the diameters of all the first patterns are uniform, the spacing between any two adjacent horizontally laterally spaced first patterns is uniform, and the spacing between any two adjacent horizontally laterally spaced first pattern columns is also uniform.

Optionally, the first patterns are arranged in the outer edge of the second patterns to form a plurality of horizontal and transverse interval first pattern columns, each horizontal and transverse interval first pattern column is composed of a plurality of first patterns which are horizontally and transversely spaced, and adjacent horizontal and transverse interval first pattern columns are horizontally and longitudinally spaced; the cleaning pipes are divided into at least two cleaning pipe groups, each cleaning pipe group comprises at least two horizontal transverse pipes, each horizontal transverse pipe corresponds to one horizontal transverse interval first pattern row one by one and is connected with the upper ports of filter cores in the corresponding horizontal transverse interval first pattern rows one by one through branch pipes respectively; the clear liquid discharging structure comprises discharging pipes which are in one-to-one correspondence with the at least two clear liquid discharging pipe groups, each discharging pipe is respectively connected with the output ends of each horizontal pipe in the clear liquid discharging pipe group in one-to-one correspondence, and all filter cores which are corresponding to each discharging pipe and output clear liquid by the discharging pipe are taken as a group of filter cores; the filter element outlet system carries out back flushing regeneration on the filter elements of the same group according to the groups of the filter elements, and carries out back flushing regeneration on the filter elements of different groups in a time-sharing way.

Optionally, the horizontal transverse pipes of the at least two clear pipe groups are staggered in the horizontal longitudinal direction; the number of filter elements respectively connected with the at least two purge groups is basically the same.

Optionally, the clearing system adopts an integral movable clearing module, and the integral movable clearing module specifically includes: the frame type support comprises a supporting base and a bridge frame arranged on the supporting base, wherein a pipeline facility installation area is formed on one side of the bridge frame on the supporting base, and a functional container facility installation area is formed in the bridge frame; the device comprises a clear liquid conveying and filter element back flushing pipeline system, wherein the clear liquid conveying and filter element back flushing pipeline system is arranged in a pipeline type facility installation area, the clear liquid conveying and filter element back flushing pipeline system comprises clear liquid conveying pipes which are in one-to-one correspondence with groups of filter elements and back flushing medium conveying pipes which are also in one-to-one correspondence with the groups of the filter elements, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through control valves which are arranged one by one, the input ends of the clear liquid conveying pipes are connected with clear liquid input hydraulic stirring backflow structures which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the back flushing medium conveying pipes are connected with the back flushing medium conveying main pipe through control valves which are arranged one by one, and the output ends of the back flushing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which are in one-to-one correspondence; the functional container equipment set is erected on the bridge and is positioned in the functional container facility installation area, the functional container equipment set comprises a backflushing device, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe.

Optionally, the pipeline sight glass is installed to the input of clear solution conveyer pipe, be connected with on the pipeline sight glass and be used for the clear solution input hydraulic stirring reflux structure of being connected with the clear solution ejection of compact structure of the group of corresponding filter core.

Optionally, the functional container device group comprises a vapor-liquid separator, and a shell of the vapor-liquid separator is respectively provided with a vapor-liquid mixed phase input structure, a separated liquid phase output structure and a separated vapor phase output structure.

Optionally, a pump equipment installation area is formed on the other side of the bridge frame on the supporting base; the integral movable clear module further comprises a pump, the pump is arranged in the pump equipment installation area, the pump comprises a clear pump, and the clear pump is connected into the clear liquid conveying main pipe to form a part of the clear liquid conveying main pipe.

Optionally, the backflushing medium input structure of the backflushing device comprises a backflushing liquid input structure and a compressed gas input structure, and a backflushing liquid overflow port is further formed in the shell of the backflushing device and is connected to the output port of the clear liquid conveying main pipe through a backflushing liquid overflow pipe, so that the output port of the clear liquid conveying main pipe is integrally higher than the backflushing liquid overflow port, and a rising section is arranged on the backflushing liquid overflow pipe.

Optionally, the functional container device group includes a heat exchange cooler, a clear liquid channel and a cooling medium channel separated from each other by a heat exchange wall are arranged in the heat exchange cooler, a clear liquid inlet and a clear liquid outlet which are respectively connected with two ends of the clear liquid channel are arranged on a shell of the heat exchange cooler, a cooling medium inlet and a cooling medium outlet which are respectively connected with two ends of the cooling medium channel are also arranged on the shell of the heat exchange cooler, and the clear liquid inlet and the clear liquid outlet are connected in series on the clear liquid conveying manifold so that the clear liquid channel forms a part of the clear liquid conveying manifold.

According to another aspect of the present application, a filtration and concentration device for a coprecipitation reaction system is provided. The coprecipitation reaction system comprises a coprecipitation reaction unit, the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry reflux structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry reflux structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle; it comprises the following steps: the filtering and concentrating unit comprises a filtering and concentrating device, the filtering and concentrating device is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear liquid cavity in the shell of the filtering and concentrating device, a slurry feeding structure to be concentrated, a slurry discharging structure to be concentrated and a clear liquid discharging structure are respectively arranged on the shell of the filtering and concentrating device, the slurry feeding structure to be concentrated and the slurry discharging structure to be concentrated are respectively communicated with the stock solution cavity, and the clear liquid discharging structure is communicated with the clear liquid cavity; the concentrated slurry discharging structure is used for being connected with the concentrated slurry reflux structure, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system; in the filter concentrator, the filter element is provided with a first edge and a second edge which are perpendicular to each other, the area of the filtering surface of the filter element is basically determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of the central axis of the shell of the filter concentrator, and the slurry feeding structure to be concentrated and the concentrated slurry discharging structure are respectively arranged on the parts of the shell of the filter concentrator, which are positioned at the two ends in the direction of the central axis, and are respectively communicated with the two ends of the stock solution cavity; if a plane perpendicular to the central axis and intersecting the filter face of the cartridge is taken as a cross-section, then: on the cross section, the clear liquid cavities are distributed in the form of a first pattern, the first pattern is a closed pattern, the shape of the closed pattern is a circle or a polygon, the area which is positioned in the shell of the filter concentrator and is except for the first pattern on the cross section is basically composed of a second pattern and a third pattern, the stock solution cavities are distributed in the form of the second pattern, the filter material of the filter element is distributed in the form of the third pattern, and the first pattern is distributed in an array on the cross section.

Optionally, the shell of the filter concentrator is provided with a vertical cylinder, and the vertical cylinder is divided into an upper cylinder, a middle cylinder and a lower cylinder which are sequentially communicated from top to bottom; the upper cylinder body is respectively provided with the slurry feeding structure to be concentrated and the clear liquid discharging structure, the clear liquid discharging structure is respectively connected with the upper ports of the filter elements through a pipe outlet tube arranged in the upper cylinder body, and the slurry feeding structure to be concentrated is used for being connected with the slurry discharging structure to be concentrated through a feed pump; a filter element mounting structure is arranged in the middle cylinder body, and the filter element is mounted in the middle cylinder body through the filter element mounting structure; the lower cylinder is respectively provided with a concentrated slurry discharging structure and a hydraulic stirring reflux structure, the concentrated slurry discharging structure is connected with the hydraulic stirring reflux structure through a hydraulic stirring pump to form a hydraulic stirring circulation loop, and the hydraulic stirring circulation loop is connected with the concentrated slurry reflux structure through a concentrated slurry reflux branch.

Optionally, when the filtering and concentrating device is operated, the liquid level in the upper cylinder is controlled within a set range, so that the liquid level in the upper cylinder is lower than the top of the upper cylinder, and a cavity is formed; and the top of the upper cylinder body is provided with an exhaust structure communicated with the cavity. Optionally, the exhaust structure is connected with a vapor-liquid mixed phase input structure of the vapor-liquid separator.

Above-mentioned coprecipitation reaction system and be used for filtering enrichment facility of coprecipitation reaction system, through the redesign to filtering the inner structure of concentrator, cancel original stirring structure, and, because wait to concentrate thick liquids feeding structure with concentrated thick liquids ejection of compact structure sets up respectively on the shell of filtering the concentrator be located the position at the both ends in the central axis direction and switch on with stoste chamber both ends respectively, consequently, the particulate matter in the thick liquids is avoided flowing in the stoste chamber of filtering the concentrator along the central axis direction of the shell of filtering the concentrator to avoid the thick liquids to block up the stoste chamber, extension filter cake on the filter core forms time. In addition, through redesigning the internal structure of the filter concentrator, the diameter of the filter concentrator can be obviously reduced, the residence time of reaction slurry in the filter concentrator outside the reaction kettle body is effectively reduced, the influence of the independent deployment of the filter concentrator on the reaction is greatly reduced, and the granularity consistency of ternary precursors is ensured.

The present application is further described below with reference to the drawings and detailed description. Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic diagram of a coprecipitation reaction system according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a coprecipitation reaction system according to an embodiment of the present application.

FIG. 3 is a schematic diagram of a coprecipitation reaction system according to an embodiment of the present application.

FIG. 4 is a schematic cross-sectional view of a filter concentrator in the co-precipitation reaction system of FIG. 1.

FIG. 5 is a schematic view of a purge line set of a filter concentrator in the co-precipitation reaction system of FIG. 1.

FIG. 6 is a schematic diagram of a filter concentrator in a coprecipitation reaction system according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a filter concentrator in a coprecipitation reaction system according to an embodiment of the present application.

Fig. 8 is a schematic view of a filter cartridge of the filter concentrator of fig. 6.

Fig. 9 is a schematic view of a filter cartridge of the filter concentrator of fig. 7.

Fig. 10 is a schematic view of a filter cartridge of the filter concentrator of fig. 7.

FIG. 11 is a three-dimensional block diagram of a purge system in a coprecipitation reaction system according to an embodiment of the present application.

Fig. 12 is a three-dimensional block diagram of the system of fig. 11 at another angle.

Fig. 13 is a three-dimensional block diagram of the system of fig. 11 at another angle.

Fig. 14 is a three-dimensional block diagram of the system of fig. 11 at another angle.

Fig. 15 is a three-dimensional block diagram of the system of fig. 14 after the electrical cabinet is concealed.

Fig. 16 is a schematic diagram of the system of fig. 11.

Detailed Description

The present application will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present application based on these descriptions. Before describing the present application with reference to the accompanying drawings, it should be noted in particular that:

the technical solutions and technical features provided in the respective sections including the following description may be combined with each other without conflict. Furthermore, the described embodiments, features, and combinations of features can be combined as desired and claimed in any given application.

The embodiments of the present application referred to in the following description are typically only a few, but not all, embodiments, based on which all other embodiments, as would be apparent to one of ordinary skill in the art without undue burden, are within the scope of patent protection.

With respect to terms and units in this specification: the terms "comprising," "including," "having," and any variations thereof, in this specification and the corresponding claims and related parts, are intended to cover a non-exclusive inclusion. In addition, the term "reactor" in this specification and the corresponding claims and the related parts is not necessarily to be construed as a single reactor, but may be construed as an integral body including a main reactor and a sub-reactor, or an integral body including a reactor and an aging reactor. Other related terms and units may be reasonably construed based on the description provided herein.

Prior to the applicant of the present application, two co-precipitation reaction systems have been developed for the preparation of ternary precursors of positive electrode materials for lithium ion secondary batteries. These two co-precipitation reaction systems are briefly described below for a full understanding of the present application. For convenience of description, these two coprecipitation reaction systems are hereinafter named as a first coprecipitation reaction system and a second coprecipitation reaction system, respectively.

First coprecipitation reaction system

The first coprecipitation reaction system mainly comprises: a coprecipitation reaction unit and a filtration concentration unit. The filter-concentration unit may also contain a purge system as described below, if desired (depending primarily on the range of products that the applicant actually sells out).

The coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry reflux structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry reflux structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle.

The filtering and concentrating unit comprises a filtering and concentrating device, the filtering and concentrating device is provided with a shell and a filter element, the filter element is in a raw liquid cavity and a clear liquid cavity are formed in the shell of the filtering and concentrating device, a slurry feeding structure to be concentrated, a slurry discharging structure to be concentrated and a clear liquid discharging structure are respectively arranged on the shell of the filtering and concentrating device, the slurry feeding structure to be concentrated and the slurry discharging structure to be concentrated are respectively communicated with the raw liquid cavity, and the clear liquid discharging structure is communicated with the clear liquid cavity.

In addition, the filter concentrator is also provided with a stirring structure. The stirring structure in the filter concentrator comprises a main shaft positioned in the filter concentrator and a stirring paddle arranged on the main shaft, and the main shaft is driven by a motor outside the filter concentrator. The filter elements in the filter concentrator are arranged at intervals on the periphery of the stirring paddles, and when the stirring paddles rotate, slurry can be stirred, so that particles in the slurry are prevented from settling, and meanwhile, the filter cake forming time on the filter elements is prolonged.

The concentrated slurry discharging structure is used for being connected with the concentrated slurry feeding structure, the concentrated slurry discharging structure is used for being connected with the concentrated slurry backflow structure, the raw material feeding structure is used for being connected with a reaction raw material supply device of a coprecipitation clearing system, and the clear liquid discharging structure is used for being connected with the clearing system.

The raw material feeding structure, the slurry discharging structure to be concentrated, the concentrated slurry reflux knot, the slurry feeding structure to be concentrated, the concentrated slurry discharging structure and the clear liquid discharging structure can respectively comprise corresponding pipeline interfaces, and valves are further arranged on the pipeline interfaces when needed.

In the preparation process of the ternary precursor of the lithium ion secondary battery anode material, nickel sulfate (or nickel chloride), cobalt sulfate (or cobalt chloride) and manganese sulfate (or manganese chloride) are prepared into a mixed salt solution with a certain molar concentration, sodium hydroxide is prepared into an alkali solution with a certain molar concentration, ammonia water with a certain concentration is used as a complexing agent, then the mixed salt solution, the alkali solution and the complexing agent are added into a reaction kettle through a raw material feeding structure at a certain flow, the stirring rate of the reaction kettle, the temperature and the pH value of reaction slurry, the reaction atmosphere (the reaction process is generally required to be completed under the protection of nitrogen at present) and the like are controlled, so that salt and alkali are subjected to neutralization reaction to generate ternary precursor crystal nuclei and grow gradually. In the operation process of the reaction kettle, along with the addition of reaction raw materials into the reaction kettle, part of reaction slurry in the reaction kettle is pumped into a filtering concentrator, a filter element is arranged in the filtering concentrator and is provided with a stirring structure, clear liquid can be output from the filtering concentrator after the reaction slurry is filtered through the filter element and can be reused for reaction as mother liquor, and concentrated solution in the filtering concentrator returns to the reaction kettle through a concentrated slurry reflux structure. When the filter is concentrated, the stirring paddle in the filter concentrator rotates to stir the slurry, so that the particles in the slurry are prevented from settling, and the filter cake forming time on the filter element is prolonged.

Drawbacks of the first coprecipitation reaction system include: first, the internal design of the filter concentrator results in a larger filter concentrator volume, so that the residence time of the reaction slurry in the filter concentrator outside the reaction kettle body is longer, the reaction process is influenced by various process parameters, and the reaction is influenced once the environment changes, so that the consistency of the particle sizes of the reaction and the ternary precursor is influenced when the residence time of the slurry in the filter concentrator is longer. Second, the filter element forming time on the surface of the filter element is shorter when the high-concentration slurry is treated, and the filtration flux is rapidly reduced. Thirdly, the slurry cannot be dispersed for a long time after forming a filter cake, so that the particles are agglomerated, and the consistency of the appearance of the product is affected. Fourth, the tank and stirring structure of the filter concentrator are bulky, resulting in high manufacturing and use costs. Fifthly, the stirring structure has high motor power and high energy consumption.

Second coprecipitation reaction system

Aiming at the problems brought by the independent deployment of the filter concentrator of the first coprecipitation reaction system, the filter concentrator is eliminated by the second coprecipitation reaction system, and the filter element of the filter concentrator is directly arranged in the reaction kettle. In this case, the reaction kettle can be called as a coprecipitation reaction and filtration concentration integrated device.

Specifically, coprecipitation reaction and filtration concentration integration equipment contains reation kettle and filter core that the equipment is in the same place, reation kettle has shell and inner chamber, be equipped with raw materials feeding structure, concentrated thick liquids ejection of compact structure and clear liquid ejection of compact structure on reation kettle's the shell respectively, be equipped with stirring structure in reation kettle's the inner chamber, the filter core is installed form stoste chamber and clear liquid chamber in the shell of filtration concentrator.

The inner cavity of the reaction kettle is communicated with the stock solution cavity, the raw material feeding structure and the concentrated slurry discharging structure are respectively communicated with the inner cavity of the reaction kettle, the raw material feeding structure is used for being connected with a coprecipitation reaction raw material supply device, the clear liquid discharging structure is communicated with the clear liquid cavity, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system.

Because the reaction and the filtration concentration are carried out in the coprecipitation reaction and filtration concentration integrated equipment, the reaction slurry is always in the same environment, and the influence of the independent deployment of the filtration concentrator on the reaction is avoided. However, it should be noted that: the coprecipitation reaction and filtration concentration integrated equipment has higher requirement on the stability of preventing the breakage of the filter element. Because if the material breaks down once the cartridge, the material that falls off the cartridge is mixed into the reaction slurry, resulting in contamination of the reaction slurry.

In addition, the second coprecipitation reaction system cannot solve the problems that when the coprecipitation reaction and filtration concentration integrated equipment processes high-concentration slurry, the forming time of a filter element on the surface of the filter element is short, and the filtration flux is rapidly reduced; after the slurry forms a filter cake, the slurry cannot be dispersed for a long time, so that the particles are agglomerated, and the consistency of the morphology of the product is affected; the volume of the tank body and the stirring structure of the coprecipitation reaction and filtration concentration integrated equipment is larger, so that the manufacturing and use cost is higher; the stirring structure has the problems of high motor power, high energy consumption and the like.

In addition, the clear liquid filtered by the filter element is output through a clear system no matter the first coprecipitation reaction system or the second coprecipitation reaction system. At present, the clearing system mainly comprises a plurality of parts such as a pipeline, a valve, a backflushing device and the like, wherein the parts are temporarily installed on site along with the site installation of the filtration concentrator or the coprecipitation reaction and filtration concentration integrated equipment, so that the construction strength is high, the construction time is long, and the project construction progress is influenced.

The present application thus proposes the following examples, giving corresponding solutions to the technical problem of the reaction affected by the large volume of the filter concentrator.

Third coprecipitation reaction system

FIG. 1 is a schematic diagram of a coprecipitation reaction system according to an embodiment of the present application. FIG. 4 is a schematic cross-sectional view of a filter concentrator in the co-precipitation reaction system of FIG. 1. FIG. 5 is a schematic view of a purge line set of a filter concentrator in the co-precipitation reaction system of FIG. 1. As shown in fig. 1 and 4-5, a coprecipitation reaction system includes a coprecipitation reaction unit and a filtration concentration unit. The filter-concentration unit may also contain a purge system as described below, if desired (depending primarily on the range of products that the applicant actually sells out).

The coprecipitation reaction unit comprises a reaction kettle 310, the reaction kettle 310 is provided with a shell 311 and an inner cavity 312, a raw material feeding structure 313, a slurry discharging structure 314 to be concentrated and a concentrated slurry reflux structure 315 are respectively arranged on the shell 311 of the reaction kettle 310, the raw material feeding structure 313, the slurry discharging structure 314 to be concentrated and the concentrated slurry reflux structure 315 are respectively communicated with the inner cavity 312 of the reaction kettle 310, and a stirring structure 316 is arranged in the inner cavity 312 of the reaction kettle 310.

The filtering and concentrating unit comprises a filtering and concentrating device 100, the filtering and concentrating device 100 is provided with a shell 110 and a filter element 120, the filter element 120 forms a stock solution cavity 111 and a clear liquid cavity 121 in the shell 110 of the filtering and concentrating device 100, a slurry feeding structure 130 to be concentrated, a slurry discharging structure 140 to be concentrated and a clear liquid discharging structure 150 are respectively arranged on the shell 110 of the filtering and concentrating device 100, the slurry feeding structure 130 to be concentrated and the slurry discharging structure 140 to be concentrated are respectively communicated with the stock solution cavity 111, and the clear liquid discharging structure 150 is communicated with the clear liquid cavity 121.

Wherein, the slurry discharging structure 314 to be concentrated is used for being connected with the slurry feeding structure 130 to be concentrated, the concentrated slurry discharging structure 140 is used for being connected with the concentrated slurry reflux structure 315, the raw material feeding structure 313 is used for being connected with a coprecipitation reaction raw material supplying device, and the clear liquid discharging structure 150 is used for being connected with the clear liquid discharging system 200.

In the filter concentrator 100, the filter element 120 has a first edge and a second edge which are perpendicular to each other, the area of the filtering surface of the filter element is substantially determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of the central axis of the housing 110 of the filter concentrator 100, and the slurry feeding structure 130 to be concentrated and the concentrated slurry discharging structure 140 are respectively arranged on the housing 110 of the filter concentrator 100 at the positions at two ends in the direction of the central axis and are respectively communicated with two ends of the raw liquid cavity 111.

If a plane perpendicular to the central axis and intersecting the filter surface of the filter element 120 is a cross section, the filter element is: the clear liquid chamber 121 is distributed in the form of a first pattern having a closed pattern in the shape of a circle or a polygon, the region of the cross section, which is located in the housing 110 of the filter concentrator 100 and is excluding the first pattern, is substantially composed of a second pattern and a third pattern, the raw liquid chamber 111 is distributed in the form of the second pattern, the filter material of the filter cartridge 120 is distributed in the form of the third pattern, and the first pattern is distributed in the form of an array on the cross section.

In the above coprecipitation reaction system, the original stirring structure is eliminated by redesigning the internal structure of the filter concentrator 100, and the to-be-concentrated slurry feeding structure 130 and the concentrated slurry discharging structure 140 are respectively arranged on the housing 110 of the filter concentrator 100 at the positions at the two ends in the central axis direction and are respectively communicated with the two ends of the raw liquid cavity 111, so that the raw liquid cavity 111 is prevented from being blocked by particles in the slurry by making the slurry flow in the raw liquid cavity 111 of the filter concentrator 100 along the central axis direction of the housing 110 of the filter concentrator 100, and the filter cake forming time on the filter element 120 is prolonged. In addition, through redesigning the internal structure of the filter concentrator, the diameter of the filter concentrator 100 can be obviously reduced, the residence time of reaction slurry in the filter concentrator 100 outside the reaction kettle 310 is effectively reduced, the influence of the independent deployment of the filter concentrator 100 on the reaction is greatly reduced, and the granularity consistency of ternary precursors is ensured.

In a preferred embodiment, the housing 110 of the filter concentrator 100 has a vertical cylinder divided from top to bottom into an upper cylinder 112, a middle cylinder 113 and a lower cylinder 114 which are sequentially communicated.

The upper cylinder 112 is provided with the slurry feeding structure 130 to be concentrated and the clear liquid discharging structure 150, the clear liquid discharging structure 150 is connected with the upper ports of the filter cores 120 through clear liquid discharging pipes 151 arranged in the upper cylinder 112, and the slurry discharging structure 314 to be concentrated is connected with the slurry feeding structure 130 to be concentrated through a feed pump 160.

The middle cylinder 113 is internally provided with a filter element mounting structure, and the filter element 120 is mounted in the middle cylinder 113 through the filter element mounting structure.

The lower cylinder 114 is respectively provided with the concentrated slurry discharging structure 140 and the hydraulic stirring reflux structure 170, the concentrated slurry discharging structure 140 is connected with the hydraulic stirring reflux structure 170 through a hydraulic stirring pump 180 to form a hydraulic stirring circulation loop, and the hydraulic stirring circulation loop is connected with the concentrated slurry reflux structure 315 through a concentrated slurry reflux branch 190.

The above-mentioned manner first defines the filtering concentrator 100 as a vertical structure, and further the slurry feeding structure 130 to be concentrated and the concentrated slurry discharging structure 140 are disposed at the upper and lower portions of the filtering concentrator 100, respectively, so that the flow of slurry is achieved and the sedimentation of particulate matters is promoted by gravity during the filtering process. On the basis, a hydraulic stirring loop is additionally arranged at the lower part of the filter concentrator 100, and part of the slurry output from the concentrated slurry discharging structure 140 is returned to a high-concentration area formed by the lower stock solution cavity 111 of the filter concentrator 100 through a hydraulic stirring reflux structure 170, so that the high-concentration area formed by the lower stock solution cavity 111 of the filter concentrator 100 is hydraulically stirred, the blockage caused by the accumulation of particles at the bottom of the filter concentrator 100 is avoided, and the concentrated slurry is promoted to be output through the concentrated slurry discharging structure 140.

Preferably, the lower cylinder 114 further comprises a bottom cone structure, the diameter of the bottom cone structure gradually decreases from top to bottom, and the lower end of the bottom cone structure is provided with the hydraulic stirring backflow structure 170. The structure can play a better role in hydraulic stirring.

In an alternative embodiment, the height of the concentrated slurry discharging structure 140 is higher than that of the hydraulic stirring reflux structure 170, and in the hydraulic stirring circulation loop, the feeding end of the hydraulic stirring pump 180 is connected with the concentrated slurry discharging structure 140, and the discharging end is connected with the hydraulic stirring reflux structure 170; one end of the concentrated slurry recirculation branch 190 is connected to a conduit between the concentrated slurry discharge structure 140 and the feed end of the hydraulic agitator pump 180 (as shown in fig. 1).

In an alternative embodiment, the height of the concentrated slurry discharging structure 140 is higher than that of the hydraulic stirring reflux structure 170, in the hydraulic stirring circulation loop, the feeding end of the hydraulic stirring pump 180 is connected with the concentrated slurry discharging structure 140, the discharging end is connected with the hydraulic stirring reflux structure 170, and one end of the concentrated slurry reflux branch 190 is connected on a pipeline between the hydraulic stirring reflux structure 170 and the discharging end of the hydraulic stirring pump 180.

The concentrated slurry discharge structure 140 may comprise, in addition to corresponding conduit interfaces on the side wall of the lower cylinder 114, a conduit within the lower cylinder 114, which may be of a horizontal ring shape or a horizontal semi-ring shape or other shape arranged horizontally, and on which an inlet conduit extending in the direction of the side wall of the bottom cone structure may be arranged.

Preferably, when the coprecipitation reaction system is operated, the liquid level in the upper cylinder 112 is controlled within a set range, so that the liquid level in the upper cylinder 112 is lower than the top of the upper cylinder and a cavity is formed; the top of the upper cylinder 112 is provided with an exhaust structure in communication with the cavity. Wherein the exhaust structure may be connected to a vapor-liquid mixed phase input structure of the vapor-liquid separator 233.

In addition, compressed gas is also used when regenerating the filter element (which will be described later), so that an exhaust structure is arranged at the top of the upper cylinder 112, thereby providing an exhaust channel for the gas and avoiding influencing the operation of the coprecipitation reaction system. Since the liquid level in the upper cylinder 112 is controlled within a set range, the liquid level in the upper cylinder 112 is lower than the top of the upper cylinder, and a cavity is formed, so that the top of the upper cylinder can be prevented from being pressurized.

In the general embodiment, as shown in fig. 4, the cartridge 120 is a tubular cartridge, and therefore, the outer edge of the second pattern forms a rounded edge. Also, the vertical cylinder of the housing 110 of the filter concentrator 100 is a cylindrical cylinder, and thus, the first pattern is circular.

The tubular filter element has a first edge and a second edge that are perpendicular to each other. Wherein the first edge can be regarded as a generatrix of the cylindrical surface formed by the tubular filter element inner conduit, and the second edge can be regarded as a circle formed by the bottom edge or the top edge of the cylindrical surface formed by the tubular filter element inner conduit. Here, the filtration area of the tubular filter element is equal to the product of the length of the first edge and the length of the second edge.

Preferably, the first patterns are arranged in the circular edge to form a plurality of horizontally and transversely spaced first pattern columns, each horizontally and transversely spaced first pattern column is composed of a plurality of horizontally and transversely spaced first patterns, and adjacent horizontally and transversely spaced first pattern columns are arranged at intervals along the horizontal and longitudinal directions.

And, between adjacent horizontal spacing first pattern columns, first patterns in one horizontal spacing first pattern column and first patterns in another horizontal spacing first pattern column are staggered along the horizontal transverse direction.

In addition, in the circular edge, the diameters of all the first patterns are uniform, the spacing between any two adjacent horizontally laterally spaced first patterns is uniform, and the spacing between any two adjacent horizontally laterally spaced first pattern columns is also uniform.

After the filter element setting mode is adopted, six filter elements 120 which are respectively equidistant with the filter elements are distributed around each filter element 120 except the filter elements 120 which are close to the round edge. In this way, the rate of cake formation on these cartridges 120 is nearly uniform, excluding other factors.

In addition, since the first pattern is arranged in the circular edge to form a plurality of horizontally laterally spaced rows of first patterns, that is, the filter elements 120 in the housing 110 of the filter concentrator 100 are also arranged to form a plurality of horizontally laterally spaced rows of filter elements, it is easy to avoid the staggered arrangement of the pipes in the pig 151.

As shown in fig. 5, when the first patterns are arranged in the outer edge of the second pattern to form a plurality of horizontally and laterally spaced first pattern columns, each horizontally and laterally spaced first pattern column is formed by a plurality of horizontally and laterally spaced first patterns, and adjacent horizontally and longitudinally spaced first pattern columns are arranged, the purge tube 151 may be divided into at least two purge tube groups, each purge tube group includes at least two horizontally and laterally spaced tubes 1511, and each horizontally and laterally spaced first pattern column corresponds to one horizontally and laterally spaced first pattern column one by one and is connected to the upper port of each filter element 120 in the corresponding horizontally and laterally spaced first pattern column by a branch tube. The horizontal cross tube 1511 is oriented in a uniform manner to facilitate the positioning of the clear liquid discharge structure 150.

Moreover, the clear liquid discharging structure 150 may include discharging pipes 152 corresponding to the at least two clear liquid discharging pipe groups one by one, each discharging pipe 152 is connected with an output end of each horizontal pipe 1511 in the clear liquid discharging pipe group corresponding to one by one, and all filter cores 120 outputting clear liquid by each discharging pipe 152 are a group of filter cores.

In addition, the purge system 200 performs the back flush regeneration of the same group of filter elements 120 at the same time according to the group of filter elements 120, and performs the back flush regeneration of different groups of filter elements 120 at different times. By adopting the grouping backflushing regeneration mode, the rest filter elements 120 can continuously work when backflushing regeneration is carried out on one group of filter elements 120, thus being beneficial to improving the operation efficiency of the coprecipitation reaction system.

On this basis, as shown in fig. 5, the horizontal transverse pipes 1511 of the at least two purge pipe groups are staggered in the horizontal longitudinal direction, so that: the number of cartridges 120 to which the at least two purge groups are respectively connected is substantially the same. Since the number of cartridges 120 to which the at least two purge groups are respectively connected is substantially the same (e.g., there are three purge groups in fig. 5, the number of cartridges 120 to which they are respectively connected is 18, 19, and 18, i.e., 1 difference).

This has the advantage that it is easy to ensure uniformity of the effect of the respective backflushing regeneration of each set of filter elements 120, and helps to bring the filtration flux of each set of filter elements 120 closer to uniformity.

Clearing system

Aiming at the problems that the existing clearing system needs to be temporarily installed on site, the construction strength is high, the construction time is long, and the project construction progress is influenced, the clearing system is redesigned, and an integral movable clearing module is provided. The clearing system adopting the integral movable clearing module can be used in the first coprecipitation reaction system, the second coprecipitation reaction system or the third coprecipitation reaction system. When the purge system is used in different coprecipitation reaction systems, the configuration of the purge system may be different, but the overall structure is similar.

FIG. 11 is a three-dimensional block diagram of a purge system in a coprecipitation reaction system according to an embodiment of the present application. Fig. 12 is a three-dimensional block diagram of the system of fig. 11 at another angle. Fig. 13 is a three-dimensional block diagram of the system of fig. 11 at another angle. Fig. 14 is a three-dimensional block diagram of the system of fig. 11 at another angle. Fig. 15 is a three-dimensional block diagram of the system of fig. 14 after the electrical cabinet is concealed. Fig. 16 is a schematic diagram of the system of fig. 11. The purge system shown in FIGS. 11-16 was actually designed for the second coprecipitation reaction system described above. When the purge system is used in a different coprecipitation reaction system, the overall structure is still similar to that shown in FIGS. 11-16, but may be partially modified as desired.

As shown in fig. 11-16, the integral mobile clearing module specifically includes: frame support 220, clear liquid conveying and filter element back flushing pipeline system 210, functional container equipment group 230 and the like.

Wherein the frame type support 220 comprises a supporting base 221 and a bridge frame 222 arranged on the supporting base 221, a pipeline facility installation area 223 is formed on one side of the bridge frame 222 on the supporting base 221, and a functional container facility installation area 224 is formed in the bridge frame 222.

The clear liquid conveying and filter element back flushing pipeline system 210 is installed in the pipeline facility installation area 223, the clear liquid conveying and filter element back flushing pipeline system 210 comprises clear liquid conveying pipes 211 corresponding to groups of filter elements one by one and back flushing medium conveying pipes 212 corresponding to groups of filter elements one by one, the output end of the clear liquid conveying pipes 211 is connected with a clear liquid conveying main pipe 215 through control valves 213 which are arranged one by one, the input end of the clear liquid conveying pipes 211 is connected with a clear liquid input interface which is used for being connected with a clear liquid discharging structure of the groups of corresponding filter elements, the input end of the back flushing medium conveying pipes 212 is connected with the back flushing medium conveying main pipe 216 through control valves 214 which are arranged one by one, and the output end of the back flushing medium conveying pipes 212 is connected with a bypass of the clear liquid conveying pipes 211 corresponding to one.

The

control valves

213 and 214 may be pneumatic valves. By controlling the states of the

corresponding control valves

213 and 214, the operating state (filtration or backflushing regeneration) of a particular group of cartridges can be controlled.

The functional container device group 230 is erected on the bridge frame 222 and is located in the functional container facility installation area 224, the functional container device group 230 comprises a backflushing device 231, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on the shell of the backflushing device 231, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe 216. The backflushing medium can be backflushing gas or backflushing liquid.

Typically, the cartridge is not less than 2 in group, so that the clear fluid delivery tubes 211 and the cartridge backwash piping system 210 may each be horizontally laterally spaced apart by the backwash medium delivery tubes 212 so that the clear fluid delivery and cartridge backwash piping system 210 is disposed in the plumbing installation area 223.

Since the clear liquid conveying pipes 211 and the back flushing medium conveying pipes 212 in the clear liquid conveying and filter element back flushing pipeline system 210 can be arranged at intervals along the horizontal and transverse directions, the central axis of the clear liquid conveying pipe 211 and the central axis of the back flushing medium conveying pipe 212 connected with the clear liquid conveying pipes 211 in a one-to-one correspondence manner can be positioned in the same vertical plane. In this way, the overall horizontal lateral width of the clean fluid delivery and cartridge backwash piping 210 can be saved.

Because the clear liquid conveying pipes 211 and the back flushing medium conveying pipes 212 in the clear liquid conveying and filter element back flushing pipeline system 210 can be arranged at intervals horizontally and transversely, for convenience in arrangement, the clear liquid conveying main pipe 215 can be provided with a clear liquid conveying main pipe horizontal transverse extension section, and the output end of the clear liquid conveying pipe 211 in the clear liquid conveying and filter element back flushing pipeline system 210 is connected with the clear liquid conveying main pipe horizontal transverse extension section through a one-to-one control valve 213.

Similarly, the backflushing media transport header 216 may have a backflushing media transport header horizontal transverse extension, with the output of the backflushing media transport tubes 212 in the clean liquid transport and cartridge backflushing piping 210 being connected to the backflushing media transport header horizontal transverse extension by a one-to-one arrangement of control valves 214.

On this basis, the horizontal extension of the backflushing medium conveying header pipe may be located above the horizontal extension of the supernatant conveying header pipe (as shown in fig. 12 to 13), and the backflushing medium conveying pipes 212 are located above the one-to-one corresponding supernatant conveying pipes 211. Thus, the space can be saved, the pipeline arrangement is convenient, and the upward force can be applied to the clear liquid conveying pipe 211 by utilizing the recoil medium conveying pipe 212, so that the clear liquid conveying pipe 211 can be positioned conveniently.

In this way, the whole clean liquid conveying and filter element back flushing pipeline system 210 can be supported and fixed by only installing the clean liquid conveying pipe installation positioning device 217 with a simple structure on the supporting base 221 (the clean liquid conveying pipe installation positioning device 217 adopts a pipe clamp here), and connecting the clean liquid conveying pipe 211 with the clean liquid conveying pipe installation positioning device 217.

On the basis of the above-mentioned integral movable clearing module structure, the present application also makes improvements on the integral movable clearing module, which can be applied to the integral movable clearing module in whole (combined) or in part (alone) to realize specific functions or solve specific problems.

Improvements in the first aspect

As shown in fig. 11-16, the input end of the clear liquid conveying pipe 211 is provided with a pipeline sight glass 218, and the pipeline sight glass 218 is connected with a clear liquid input interface for being connected with a clear liquid discharging structure of the group of the corresponding filter element.

Specifically, the input end of the clear liquid conveying pipe 211 has a vertical section, the tube sight glass 218 adopts a vertical tube sight glass and is mounted on the vertical section, and the clear liquid input interface is an upper port of the vertical tube sight glass.

After the pipeline sight glass 218 is installed at the input end of the clear liquid conveying pipe 211, the turbidity of the clear liquid in the clear liquid conveying pipe 211 can be observed through the pipeline sight glass 218, so that whether the filter elements of the group corresponding to the clear liquid conveying pipe 211 are subjected to filtration or not can be judged, and if the filter elements are subjected to filtration, the control valve 213 on the clear liquid conveying pipe 211 can be closed.

The pipeline sight glass 218 is arranged at the input end of the clear liquid conveying pipe 211, whether each group of filter elements pass through can be judged according to the groups of the filter elements, the investigation difficulty is reduced, and meanwhile, the pipeline sight glass 218 is close to the backflushing device 231, so that the pipeline sight glass 218 can be flushed through short-distance backflushing, and the visibility of the pipeline sight glass 218 is ensured.

When the input end of the clear liquid conveying pipe 211 is provided with a vertical section, and the pipeline sight glass 218 is arranged on the vertical section by adopting the vertical pipeline sight glass, the observation is convenient, and meanwhile, the blocking of the pipeline sight glass 218 after the filtration can be effectively avoided.

Improvements in the second aspect

As shown in fig. 11-16, a pipe-like facility installation area 223 is formed on one side of the bridge frame 222 and a pump-like equipment installation area 225 is formed on the other side of the support base 221, and a pump-like equipment maintenance operation area 226 is reserved between the pump-like equipment installation area 225 and the bridge frame 222.

The purge system further comprises a pump unit 240, wherein the pump unit 240 is mounted in the pump installation area 225 and comprises a positive pump 241 and a negative pump (not shown) which are arranged at intervals along the horizontal and transverse directions, the positive pump 241 and the negative pump are symmetrically arranged with a plumb plane which is arranged in the same direction as the horizontal and longitudinal directions as a symmetry plane, and the positive pump 241 and the negative pump are mutually connected in parallel and are respectively and selectively connected into the clear liquid conveying main pipe 215 through valves to form a part of the clear liquid conveying main pipe.

The pump stack 240 comprises a positive pump 241 and a negative pump arranged at intervals in the horizontal and transverse directions, i.e. with a redundant design, ensuring the stability of the operation of the pump stack 240. A pump equipment maintenance operation area 226 is skillfully reserved between the pump equipment installation area 225 and the bridge frame 222, so that the on-site maintenance of the positive pump 241 and/or the standby pump is facilitated. In addition, the symmetrical design is adopted between the positive pump 241 and the standby pump, so that the weight distribution uniformity of the integral movable type discharging module can be improved, the running vibration of the movable type discharging module is reduced, and meanwhile, the influence is smaller when the positive pump 241 and the standby pump are switched.

The significance of the improvement of the second aspect described above for the first, second and third co-precipitation reaction systems is different.

When applied to the first or third coprecipitation reaction system, since the first or third coprecipitation reaction system is generally provided with a feed pump between the reaction vessel and the filtration concentrator, the positive pump 241 and the back-up pump can be used as a purge pump by the improvement of the second aspect described above, and when the output port of the purge conveying manifold 215 needs to be raised (which will be described later), the back flow of the purge is prevented.

When applied to the second coprecipitation reaction system, since the first coprecipitation reaction system usually needs to adopt "negative pressure for discharging, that is, a pump is required to be arranged at the downstream of the clear liquid output flow path of the filter element for pumping, the positive pump 241 and the standby pump actually provide a filtration pressure difference for the filtration concentration operation of the integrated coprecipitation reaction and filtration concentration device. At this point, it becomes more important to integrate the pump stack 240 on the integral removable purge module. In this case, the positive pump 241 and the backup pump are preferably hose pumps.

In addition, as shown in fig. 11 to 16, the frame-type support 221 forms an electric box installation area on the side opposite to the pump-type equipment maintenance operation area 226 among the two sides of the pump-type equipment installation area 225; the integral mobile purge module further includes an electrical box 250, and the electrical box 250 is installed in the electrical box installation area.

In addition, the clear liquid transfer manifold 215 includes a lifting section 215A downstream of the positive and negative pumps; the lifting section 215A is respectively provided with an output port of the clear liquid conveying main pipe, a cleaning liquid input port and a cleaning liquid output port; the cleaning liquid output port is connected to the back flushing medium conveying main pipe through a cleaning liquid conveying pipe 215B, and a control valve 215C is arranged on the cleaning liquid conveying pipe; an L-shaped cantilever 222A may be disposed on the bridge 222 at a side facing the pump equipment installation area 225, and the vertical section of the L-shaped cantilever 222A may respectively connect and support the horizontal pipe section where the output port of the clear liquid conveying manifold 215 is located and the horizontal pipe section where the cleaning liquid input port is located.

In addition, the fluid delivery interface in the functional container apparatus set 230 for external connection to the integral removable purge module is oriented in the same horizontal lateral direction as the fluid delivery interface in the pump set 240 for external connection to the integral removable purge module and is not obstructed by the structure in the integral removable purge module.

Improvements in the third aspect

As shown in fig. 11 to 16, on the basis of the modification of the second aspect, the functional container device group 230 further includes a heat exchange cooler 232, in which a clear liquid passage and a cooling medium passage are provided, which are separated from each other by a heat exchange wall, a clear liquid inlet and a clear liquid outlet, which are respectively connected to both ends of the clear liquid passage, are provided on a housing of the heat exchange cooler 232, a cooling medium inlet and a cooling medium outlet, which are respectively connected to both ends of the cooling medium passage, are also provided on a housing of the heat exchange cooler 232, and the clear liquid inlet and the clear liquid outlet are connected in series to the clear liquid conveying manifold 215 such that the clear liquid passage forms a part of the clear liquid conveying manifold 215. The heat exchange cooler 232 may use water as a cooling medium.

The clear liquid can be cooled by the heat exchange cooler 232, and the growth condition of the ternary precursor particles is destroyed, so that the further generation of the ternary precursor particles in the clear liquid is avoided, and the blockage of the clear liquid conveying main pipe 215, particularly the positive pump 241 and the standby pump, is avoided. In addition, when the positive pump 241 and the standby pump adopt hose pumps, the clear liquid can be cooled by the heat exchange cooler 232, and then the hose in the hose pumps can be protected, so that the service life of the hose pumps is prolonged.

Further, the heat exchange cooler 232 is a vertical container, the clear liquid inlet is located at the upper end of the heat exchange cooler, the clear liquid outlet is located at the lower end of the heat exchange cooler 232, and a pipe section located between the clear liquid outlet and the positive pump 241 and the standby pump on the clear liquid conveying main 215 connects the clear liquid outlet with the positive pump 241 and the standby pump through the bottom of the pump equipment maintenance operation area 226.

After the heat exchange cooler 232 adopts a vertical container, the occupied space is saved, and the installation on the bridge frame 222 is convenient. On this basis, a clear liquid inlet is arranged at the upper end of the heat exchange cooler 232, a clear liquid outlet is arranged at the lower end of the heat exchange cooler 232, and a pipe section positioned between the clear liquid outlet and the positive pump 241 and the standby pump on the clear liquid conveying main pipe 215 is connected with the clear liquid outlet and the positive pump 241 and the standby pump through the bottom of the pump equipment maintenance operation area 226, so that as much space as possible can be reserved for the pump equipment maintenance operation area 226, and the operation is convenient.

Further, the clear liquid channel is a vertical tubular structure, the clear liquid inlet is positioned at the top of the heat exchange cooler 232 and is communicated with an upper port of the vertical tubular structure, and the clear liquid outlet is positioned at the bottom of the heat exchange cooler 232 and is communicated with a lower port of the vertical tubular structure; and, the cooling medium channel is a vertical annular pipeline between the vertical tubular structure and the shell of the heat exchange cooler 232, and the cooling medium inlet and the cooling medium outlet are respectively positioned at the upper end side part and the lower end side part of the vertical annular pipeline.

In addition, a waste water discharge branch 219 is connected to the pipe section of the clear liquid conveying main pipe 215 between the clear liquid outlet and the positive pump 241 and the standby pump near the clear liquid outlet, the waste water discharge branch 219 is located at the lowest height position of all liquid flow paths in the integral movable clear module, and a discharge valve is arranged on the waste water discharge branch 219.

Improvements in the fourth aspect

As shown in fig. 11-16, the backflushing medium input structure of the backflushing device 231 comprises a backflushing liquid input structure 231A and a compressed gas input structure 231B, and a backflushing liquid overflow port 231C is further provided on the housing of the backflushing device 231, and the backflushing liquid overflow port 231C is connected to the output port of the clear liquid conveying main 215 through a backflushing liquid overflow pipe 231D, so that the output port of the clear liquid conveying main 215 is integrally higher than the backflushing liquid overflow port 231C, and a rising section 231E is provided on the backflushing liquid overflow pipe 231D. In addition, a control valve may be provided on the backwash liquid overflow pipe 231D.

Typically, the supernatant transport manifold 215 includes a lifting section 215A downstream of the supernatant transport manifold, and the output of the supernatant transport manifold 215 is disposed on the lifting section 215A.

Conventionally, the backflushing vessel 231 employs gas backflushing or liquid backflushing, and thus the backflushing medium input structure is either the backflushing liquid input structure 231A or the compressed gas input structure 231B. Here, the backflushing medium input structure of the backflushing unit 231 includes both the backflushing liquid input structure 231A and the compressed gas input structure 231B, so that a selection between or a combination of the gas backflushing and the liquid backflushing can be made.

Based on this, this application can also adopt this kind of innovative recoil mode, namely pour into recoil liquid and compressed gas into the recoil ware 231 through recoil liquid input structure 231A and compressed gas input structure 231B respectively, like this, the inside below of recoil ware 231 is recoil liquid and the top is compressed gas to can utilize compressed gas to promote recoil liquid reverse flow filter core rapidly, conventional liquid recoil is that the membrane pump is utilized to provide recoil power, and this kind of liquid recoil effect of mode is limited. But with the innovative recoil mode, the recoil force is larger.

In addition, by controlling the volume of the backflushing liquid in the backflushing device 231, the volume of the backflushing liquid is just approximately equal to the sum of the volumes (for example, the volume of the backflushing liquid is controlled to be 1-1.2 times of the sum of the volumes) according to the sum of the volumes of the stock solution cavities of the filter element corresponding to each backflushing, so that a better backflushing effect is achieved, the quantity of backflushing liquid with a small effect is reduced, and energy consumption is further saved.

Therefore, in order to better control the volume of the backflushing liquid in the backflushing device 231, a backflushing liquid overflow port 231C is arranged on the shell of the backflushing device 231, so that the liquid level of the backflushing liquid in the backflushing device 231 is controlled, and the volume of the backflushing liquid in the backflushing device 231 is controlled. For convenience of arrangement, the backwash liquid overflow 231C is connected to the output of the clean liquid transporting main 215 through a backwash liquid overflow pipe 231D.

When a back flushing overflow port 231C is provided in the housing of the back flushing device 231 and the back flushing overflow port 231C is connected to the output port of the clear liquid transporting main pipe 215 through the back flushing overflow pipe 231D, in order to avoid leakage of the compressed gas from the back flushing overflow port 231C and the back flushing overflow pipe 231D, it is required that the output port of the clear liquid transporting main pipe 215 is integrally higher than the back flushing overflow port 231C and the back flushing overflow pipe 231D is provided with a rising section 231E, so that a liquid seal is formed in the back flushing overflow pipe 231D to avoid leakage of the compressed gas.

Improvements in the fifth aspect

As shown in fig. 11-16, the functional container apparatus set further includes a vapor-liquid separator 233, and a vapor-liquid mixed phase input structure 233A, a separated liquid phase output structure 233B, and a separated vapor phase output structure 233C are respectively disposed on the shell of the vapor-liquid separator 233.

When the modification of the fifth aspect described above is applied to the third coprecipitation reaction system, the vapor-liquid mixed phase input structure 233A, the separated liquid phase output structure 233B, and the separated vapor phase output structure 233C of the vapor-liquid separator 233 may be connected to corresponding pipes in the manner shown in fig. 1.

When the modification of the fifth aspect described above is applied to the first coprecipitation reaction system or the second coprecipitation reaction system, the gas-liquid mixed phase input structure 233A of the gas-liquid separator 233 may be communicated with the compressed gas input structure 231B of the backflushing device 231 through a communicating pipe, the communicating pipe is connected with a compressed gas source through a gas supply bypass 231D, a control valve 233D is connected in series between the gas-liquid mixed phase input structure 233A and the gas supply bypass 231D on the communicating pipe, and the gas supply bypass 231D forms a part of the compressed gas input structure 231B.

Thus, when the air pressure in the backflushing device 231 needs to be released, the control valve 233D can be opened, and the vapor-liquid two-phase matters in the backflushing device 231 enter the vapor-liquid separator 103 for vapor-liquid separation.

Preferably, the vapor-liquid mixed phase input structure 233A includes a vapor-liquid mixed phase input pipe tangential to a sidewall of the vapor-liquid separator 233, and the communicating pipe is coaxially disposed with the vapor-liquid mixed phase input pipe.

Further, the separated liquid phase output structure 233B is connected to the waste water discharge branch 219.

Fourth coprecipitation reaction system

FIG. 2 is a schematic diagram of a coprecipitation reaction system according to an embodiment of the present application. As shown in FIG. 2, a coprecipitation reaction system includes a coprecipitation reaction unit and a filtration concentration unit. The filter-concentration unit may also contain a purge system as described below, if desired (depending primarily on the range of products that the applicant actually sells out).

In the filter concentrator 100, the filter element 120 has a first edge and a second edge which are perpendicular to each other, the area of the filtering surface of the filter element is substantially determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of the central axis of the housing of the filter concentrator 100 and is perpendicular to the direction of the central axis, and the slurry feeding structure 130 to be concentrated and the concentrated slurry discharging structure 140 are both arranged at the lower end of the housing of the filter concentrator.

In the above coprecipitation reaction system, by redesigning the internal structure of the filter concentrator 100, the original stirring structure is eliminated, and since the feeding structure 130 of the slurry to be concentrated and the discharging structure 140 of the slurry to be concentrated are both disposed at the lower end of the housing 110 of the filter concentrator 100, the feeding of the slurry to be concentrated and the concentrated slurry can be mixed and stirred to avoid blocking the raw liquid cavity by particles in the slurry, that is, the feeding actually plays a role in stirring at the same time. In addition, through redesigning the internal structure of the filter concentrator 100, the diameter of the filter concentrator 100 can be obviously reduced, the residence time of reaction slurry in the filter concentrator 100 outside the reaction kettle body is effectively reduced, the influence of the independent deployment of the filter concentrator 100 on the reaction is greatly reduced, and the granularity consistency of ternary precursors is ensured.

The upper cylinder 112 is provided with the clear liquid discharging structure 150, and the clear liquid discharging structure 150 is connected with the upper ports of the filter elements 120 through clear liquid discharging pipes 151 arranged in the upper cylinder 112.

The lower cylinder 114 is respectively provided with the slurry feeding structure 130 to be concentrated, the slurry discharging structure 140 to be concentrated and the hydraulic stirring reflux structure 170, the slurry feeding structure 130 to be concentrated is connected with the slurry discharging structure 315 to be concentrated through the feeding pump 160, the slurry discharging structure 140 to be concentrated is connected with the hydraulic stirring reflux structure 170 through the hydraulic stirring pump 180 to form a hydraulic stirring circulation loop, and the hydraulic stirring circulation loop is connected with the concentrated slurry reflux structure 314 through the concentrated slurry reflux branch 190.

By adding a hydraulic stirring loop at the lower part of the filter concentrator 100, a part of the slurry output from the concentrated slurry discharging structure 140 is returned through the hydraulic stirring reflux structure 170, so that the high concentration area formed by the stock solution cavity 111 at the lower part of the filter concentrator 100 is hydraulically stirred, the blockage caused by the accumulation of particulate matters at the bottom of the filter concentrator 100 is avoided, and the concentrated slurry is promoted to be output through the concentrated slurry discharging structure 140.

Preferably, the concentrated slurry reflux branch 190 is further connected to a pipeline between the feeding end of the feeding pump 160 and the slurry discharging structure 315 to be concentrated through a diversion bypass 191, and the flow path where the feeding pump 160 is located and the flow path where the hydraulic stirring pump 180 is located are connected in series through the diversion bypass 191 to form a circulation loop. In this way, feed pump 160 cooperates with hydraulic agitator pump 180 to assist feed pump 160 with hydraulic agitator pump 180.

In a preferred embodiment, as shown in fig. 2, the slurry feeding structure 130 to be concentrated, the concentrated slurry discharging structure 140 and the hydraulic stirring and refluxing structure 170 are sequentially arranged from bottom to top, so that an upper hydraulic stirring area and a lower hydraulic stirring area are formed in a high concentration area formed in the raw liquid cavity 111 at the lower part of the filter concentrator 100, and the concentrated slurry is fully stirred.

In addition, compressed gas is also used when the filter element is regenerated, so that an exhaust structure is arranged at the top of the upper cylinder 112, thereby providing an exhaust channel for the gas and avoiding influencing the operation of a coprecipitation reaction system. Since the liquid level in the upper cylinder 112 is controlled within a set range, the liquid level in the upper cylinder 112 is lower than the top of the upper cylinder, and a cavity is formed, so that the top of the upper cylinder can be prevented from being pressurized.

In the usual embodiment, the cartridge 120 is a tubular cartridge, so that the outer edge of the second pattern forms a rounded edge. Also, the vertical cylinder of the housing 110 of the filter concentrator 100 is a cylindrical cylinder, and thus, the first pattern is circular.

When the first patterns are arranged in the outer edge of the second pattern to form a plurality of horizontal and transverse first pattern columns, each horizontal and transverse first pattern column is composed of a plurality of first patterns which are horizontally and transversely spaced, and adjacent horizontal and transverse first pattern columns are arranged along the horizontal and longitudinal intervals, the cleaning pipes 151 comprise horizontal transverse pipes 1511 which are in one-to-one correspondence with the horizontal and transverse first pattern columns, and each horizontal transverse pipe 1511 is connected with the upper port of each filter element 120 in the corresponding horizontal and transverse first pattern column through a branch pipe. The horizontal cross tube 1511 is oriented in a uniform manner to facilitate the positioning of the clear liquid discharge structure 150.

And, the clear liquid discharging structure 150 includes a discharging pipe simultaneously connected to each horizontal cross pipe 1511. At this time, the purge system 200 performs the back flush regeneration of the same group of filter elements 120 simultaneously according to the group of filter elements 120 (only one group of filter elements 120 is present).

The purge system 200 of the fourth coprecipitation reaction system is substantially the same as the purge system 200 of the third coprecipitation reaction system, except that since the fourth coprecipitation reaction system has only one set of filter elements 120, the number of related piping facilities is also adjusted in the purge system 200 of the fourth coprecipitation reaction system, and the volume of the backflushing device is adjusted.

Fifth coprecipitation reaction system

FIG. 3 is a schematic diagram of a coprecipitation reaction system according to an embodiment of the present application. As shown in fig. 3, the fifth coprecipitation reaction system is modified on the basis of the fourth coprecipitation reaction system, and the main difference between the modified system and the fourth coprecipitation reaction system is as follows.

In the fifth coprecipitation reaction system, the lower cylinder 114 is respectively provided with the slurry feeding structure 130 to be concentrated and the concentrated slurry discharging structure 140, the slurry feeding structure 130 to be concentrated and the concentrated slurry discharging structure 140 are connected by a feeding pump 160 doubling as a hydraulic stirring pump 180 to form a hydraulic stirring circulation loop, the hydraulic stirring circulation loop is connected with the slurry discharging structure to be concentrated by a slurry feeding branch to be concentrated, and the hydraulic stirring circulation loop is connected with the concentrated slurry reflux structure by a concentrated slurry reflux branch.

The fifth coprecipitation reaction system feed pump 160 also serves as the hydraulic stirring pump 180, so that the number of pumps is reduced, and the manufacturing and use costs are reduced.

Sixth coprecipitation reaction system

FIG. 6 is a schematic diagram of a filter concentrator in a coprecipitation reaction system according to an embodiment of the present application. Fig. 8 is a schematic view of a filter cartridge of the filter concentrator of fig. 6. As shown in fig. 6 and 8, the sixth coprecipitation reaction system is modified based on the fourth coprecipitation reaction system, and the main difference between the modified system and the fourth coprecipitation reaction system is as follows.

In the filtration concentrator of the sixth coprecipitation reaction system, the filter element 120 is of a disc-shaped hollow structure and is installed on the discharge pipe 122 along the axial direction of the discharge pipe 122 at intervals, a raw liquid cavity is formed outside the filter element 120, a clear liquid cavity is formed inside the filter element, a filter surface is formed by the disc surface, the disc surface of the filter element 120 is perpendicular to the discharge pipe 122, the length direction of the discharge pipe 122 is consistent with the central axis direction of the shell 110 of the filtration concentrator 100, the discharge pipe 122 is connected with the clear liquid discharging structure, the clear liquid cavity of the filter element is communicated with the discharge pipe, and the shape of the shell 110 of the filtration concentrator 100 is matched with the shape of a filtration assembly formed by assembling the filter element 120 on the discharge pipe 122.

According to the coprecipitation reaction system, through redesigning the internal structure of the filter concentrator 100, the diameter of the filter concentrator 100 can be obviously reduced, the residence time of reaction slurry in the filter concentrator 100 outside the reaction kettle body 310 is effectively reduced, the influence of separate deployment of the filter concentrator 100 on the reaction is greatly reduced, and the granularity consistency of ternary precursors is ensured.

In a preferred embodiment, a rotation shaft 123 is provided in the filter concentrator 100, the discharge pipe 122 is provided in the rotation shaft 123, and a transmission end of the rotation shaft 123 extends out of the housing 110 of the filter concentrator 100 to be connected with a rotation driving mechanism 124. At this time, the discharge pipe 122 may be connected to the clear liquid discharging structure through a rotary joint.

The rotary drive mechanism 124 typically employs an electric motor. The rotary driving mechanism 124 drives the filter element 120 to be assembled on the discharging pipe 122 through the rotary shaft 123 to integrally rotate, so that relative motion is formed between slurry and a filtering surface of the filter element 120, and filter cake formation is effectively delayed.

An impeller 125 may also be mounted to the rotating shaft 123, and the impeller 125 may include a propeller impeller and/or a turbine impeller. The propeller blades enable the slurry in the filter concentrator 100 to circulate up and down, preventing the slurry from settling. The turbine wheel may be axially directed into the slurry and then radially discharged to facilitate dispersive mixing of the slurry.

The impeller 125 and the filter cartridge 120 may be staggered in the axial direction of the axis of rotation, which may help to more effectively promote slurry flow over the filtering face of the filter cartridge 120.

In addition, the sixth coprecipitation reaction system can also adopt the concentrated slurry reflux structure design in the third coprecipitation reaction system, the fourth coprecipitation reaction system or the fifth coprecipitation reaction system. In this case, the filter concentrator 100 may not have the rotary shaft 123 and the rotary driving mechanism 124.

The cartridge 120 may be constructed in a hollow, disc-like configuration as shown in fig. 8 with a tap 122 mounting hole in the center thereof to mount the cartridge 120 to the tap 122. Filter cartridges of disc-like hollow construction are available commercially.

Seventh coprecipitation reaction system

FIG. 7 is a schematic diagram of a filter concentrator in a coprecipitation reaction system according to an embodiment of the present application. Fig. 9 is a schematic view of a filter cartridge of the filter concentrator of fig. 7. Fig. 10 is a schematic view of a filter cartridge of the filter concentrator of fig. 7. As shown in fig. 7, 9 to 10, the seventh coprecipitation reaction system is modified on the basis of the sixth coprecipitation reaction system, and the main difference between the modified system and the sixth coprecipitation reaction system is as follows.

In the filtration concentrator of the seventh coprecipitation reaction system, the filter element 120 is in a ring-shaped hollow structure and is installed on the discharge pipe 122 along the axial direction of the discharge pipe 122 at intervals, a raw liquid cavity is formed outside the filter element 120, a clear liquid cavity is formed inside the filter element, the outer surface of the filter element forms a filtering surface, the central axis of the ring-shaped hollow structure of the filter element is consistent with the length direction of the discharge pipe 122, the length direction of the discharge pipe 122 is consistent with the central axis direction of the shell 110 of the filtration concentrator 100, the discharge pipe 122 is connected with the clear liquid discharge structure, the clear liquid cavity of the filter element 120 is communicated with the discharge pipe 122, and the shape of the shell 110 of the filtration concentrator 100 is matched with the shape of a filtration assembly formed by assembling the filter element 120 on the discharge pipe 122.

In addition, the seventh coprecipitation reaction system can also adopt the concentrated slurry reflux structure design in the third coprecipitation reaction system, the fourth coprecipitation reaction system or the fifth coprecipitation reaction system. In this case, the filter concentrator 100 may not have the rotary shaft 123 and the rotary driving mechanism 124.

The filter element 120 may be a circular filter element 120A as shown in fig. 9, and the circular filter element 120A is connected to the discharge pipe 122 through a connection structure 126 (communication pipe) disposed between an inner circle of the circular filter element 120A and the discharge pipe 122.

Alternatively, the filter element 120 may be assembled by connecting a plurality of filter tubes 120B end to end via a connection joint 127, and the filter element 120B is connected to the discharge tube 122 through a connection structure 126 (communication tube) disposed between the connection joint 127 and the discharge tube 122, as shown in fig. 9.

The filter tube 120B is easier to manufacture than the annular filter element 120A.

The content of the present application is described above. Those of ordinary skill in the art will be able to implement the present application based on these descriptions. Based on the foregoing specification, all other embodiments that may be obtained by one of ordinary skill in the art without making any inventive effort are intended to be within the scope of patent protection.

Claims

1. A filtration concentration device for a coprecipitation reaction system, characterized in that:

the coprecipitation reaction system comprises a coprecipitation reaction unit, the coprecipitation reaction unit comprises a reaction kettle, the reaction kettle is provided with a shell and an inner cavity, a raw material feeding structure, a slurry discharging structure to be concentrated and a concentrated slurry reflux structure are respectively arranged on the shell of the reaction kettle, the raw material feeding structure, the slurry discharging structure to be concentrated and the concentrated slurry reflux structure are respectively communicated with the inner cavity of the reaction kettle, and a stirring structure is arranged in the inner cavity of the reaction kettle;

it comprises the following steps: the filtering and concentrating unit comprises a filtering and concentrating device, the filtering and concentrating device is provided with a shell and a filter element, the filter element forms a stock solution cavity and a clear liquid cavity in the shell of the filtering and concentrating device, a slurry feeding structure to be concentrated, a slurry discharging structure to be concentrated and a clear liquid discharging structure are respectively arranged on the shell of the filtering and concentrating device, the slurry feeding structure to be concentrated and the slurry discharging structure to be concentrated are respectively communicated with the stock solution cavity, and the clear liquid discharging structure is communicated with the clear liquid cavity;

the concentrated slurry discharging structure is used for being connected with the concentrated slurry reflux structure, and the clear liquid discharging structure is used for being connected with a clear liquid discharging system;

In the filter concentrator, the filter element is provided with a first edge and a second edge which are perpendicular to each other, the area of the filtering surface of the filter element is basically determined by the product of the length of the first edge and the length of the second edge, the direction of the length of the first edge is consistent with the direction of the central axis of the shell of the filter concentrator, and the slurry feeding structure to be concentrated and the concentrated slurry discharging structure are respectively arranged on the parts of the shell of the filter concentrator, which are positioned at the two ends in the direction of the central axis, and are respectively communicated with the two ends of the stock solution cavity;

if a plane perpendicular to the central axis and intersecting the filter face of the cartridge is taken as a cross-section, then: on the cross section, the clear liquid cavity is distributed in the form of a first graph, the first graph is a closed graph, the shape of the closed graph is a circle or polygon, the area which is positioned in the shell of the filter concentrator and is except for the first graph on the cross section is composed of a second graph and a third graph, the raw liquid cavity is distributed in the form of the second graph, the filtering material of the filter element is distributed in the form of the third graph, and the first graph is distributed in an array on the cross section.

2. The filtration and concentration device of claim 1, wherein: the shell of the filter concentrator is provided with a vertical cylinder body, and the vertical cylinder body is divided into an upper cylinder body, a middle cylinder body and a lower cylinder body which are sequentially communicated from top to bottom;

the upper cylinder body is respectively provided with the slurry feeding structure to be concentrated and the clear liquid discharging structure, the clear liquid discharging structure is respectively connected with the upper ports of the filter elements through a pipe outlet tube arranged in the upper cylinder body, and the slurry feeding structure to be concentrated is used for being connected with the slurry discharging structure to be concentrated through a feed pump;

a filter element mounting structure is arranged in the middle cylinder body, and the filter element is mounted in the middle cylinder body through the filter element mounting structure;

the lower cylinder is respectively provided with a concentrated slurry discharging structure and a hydraulic stirring reflux structure, the concentrated slurry discharging structure is connected with the hydraulic stirring reflux structure through a hydraulic stirring pump to form a hydraulic stirring circulation loop, and the hydraulic stirring circulation loop is connected with the concentrated slurry reflux structure through a concentrated slurry reflux branch.

3. The filtration and concentration device of claim 2, wherein: the lower cylinder body further comprises a bottom conical structure, the diameter of the bottom conical structure is gradually reduced from top to bottom, and the lower end of the bottom conical structure is provided with the hydraulic stirring backflow structure.

4. The filtration and concentration device of claim 2, wherein: when the filtering and concentrating device operates, the liquid level in the upper cylinder is controlled within a set range, so that the liquid level in the upper cylinder is lower than the top of the upper cylinder, and a cavity is formed; an exhaust structure communicated with the cavity is arranged at the top of the upper cylinder; the exhaust structure is connected with a gas-liquid mixed phase input structure of the gas-liquid separator.

5. The filtration and concentration device of claim 2, wherein: the height of the concentrated slurry discharging structure is higher than that of the hydraulic stirring reflux structure; in the hydraulic stirring circulation loop, the feeding end of the hydraulic stirring pump is connected with the concentrated slurry discharging structure, and the discharging end is connected with the hydraulic stirring reflux structure;

one end of the concentrated slurry reflux branch is connected to a pipeline between the concentrated slurry discharging structure and the feeding end of the hydraulic stirring pump, or one end of the concentrated slurry reflux branch is connected to a pipeline between the hydraulic stirring reflux structure and the discharging end of the hydraulic stirring pump.

6. The filtration and concentration device of claim 2, wherein: the outer edge of the second pattern forms a round edge, and the first pattern is round;

The first patterns are arranged in the round edge to form a plurality of horizontal and transverse interval first pattern columns, each horizontal and transverse interval first pattern column consists of a plurality of first patterns which are horizontally and transversely spaced, and adjacent horizontal and transverse interval first pattern columns are horizontally and longitudinally spaced;

the first patterns in one horizontal transverse interval first pattern column and the first patterns in the other horizontal transverse interval first pattern column are staggered along the horizontal transverse direction;

in the circular edge, the diameters of all the first patterns are uniform, the spacing between any two adjacent horizontally laterally spaced first patterns is uniform, and the spacing between any two adjacent horizontally laterally spaced first pattern columns is also uniform.

7. The filtration and concentration device of claim 2, wherein: the first patterns are arranged in the outer edge of the second patterns to form a plurality of horizontal and transverse interval first pattern columns, each horizontal and transverse interval first pattern column consists of a plurality of first patterns which are horizontally and transversely spaced, and adjacent horizontal and transverse interval first pattern columns are horizontally and longitudinally spaced;

The cleaning pipes are divided into at least two cleaning pipe groups, each cleaning pipe group comprises at least two horizontal transverse pipes, each horizontal transverse pipe corresponds to one horizontal transverse interval first pattern row one by one and is connected with the upper ports of filter cores in the corresponding horizontal transverse interval first pattern rows one by one through branch pipes respectively;

the clear liquid discharging structure comprises discharging pipes which are in one-to-one correspondence with the at least two clear liquid discharging pipe groups, each discharging pipe is respectively connected with the output ends of each horizontal pipe in the clear liquid discharging pipe group in one-to-one correspondence, and all filter cores which are corresponding to each discharging pipe and output clear liquid by the discharging pipe are taken as a group of filter cores;

the filter element outlet system carries out back flushing regeneration on the filter elements of the same group according to the groups of the filter elements, and carries out back flushing regeneration on the filter elements of different groups in a time-sharing way.

8. The filtration and concentration device of claim 7, wherein: the horizontal transverse pipes of the at least two clear pipe groups are staggered in the horizontal longitudinal direction; the number of filter elements respectively connected with the at least two purge groups is basically the same.

9. A filtration and concentration device according to any one of claims 1 to 8 wherein: the system of going out clearly has all adopted an integral movable to go out clear module, integral movable goes out clear module specifically contains:

The frame type support comprises a supporting base and a bridge frame arranged on the supporting base, wherein a pipeline facility installation area is formed on one side of the bridge frame on the supporting base, and a functional container facility installation area is formed in the bridge frame;

the device comprises a clear liquid conveying and filter element back flushing pipeline system, wherein the clear liquid conveying and filter element back flushing pipeline system is arranged in a pipeline type facility installation area, the clear liquid conveying and filter element back flushing pipeline system comprises clear liquid conveying pipes which are in one-to-one correspondence with groups of filter elements and back flushing medium conveying pipes which are also in one-to-one correspondence with the groups of the filter elements, the output ends of the clear liquid conveying pipes are connected with a clear liquid conveying main pipe through control valves which are arranged one by one, the input ends of the clear liquid conveying pipes are connected with clear liquid input hydraulic stirring backflow structures which are used for being connected with clear liquid discharging structures of the groups of the corresponding filter elements, the input ends of the back flushing medium conveying pipes are connected with the back flushing medium conveying main pipe through control valves which are arranged one by one, and the output ends of the back flushing medium conveying pipes are connected with bypasses of the clear liquid conveying pipes which are in one-to-one correspondence;

the functional container equipment set is erected on the bridge and is positioned in the functional container facility installation area, the functional container equipment set comprises a backflushing device, a backflushing medium input structure and a backflushing medium output structure are respectively arranged on a shell of the backflushing device, and the backflushing medium output structure is connected with the backflushing medium conveying main pipe.

10. The filtration and concentration device of claim 9, wherein: the input end of the clear liquid conveying pipe is provided with a pipeline viewing mirror, and the pipeline viewing mirror is connected with a clear liquid input hydraulic stirring reflux structure which is used for being connected with a clear liquid discharging structure of the group corresponding to the filter element;

and/or the functional container equipment group comprises a vapor-liquid separator, wherein a shell of the vapor-liquid separator is respectively provided with a vapor-liquid mixed phase input structure, a separated liquid phase output structure and a separated vapor phase output structure;

and/or, a pump equipment installation area is formed on the other side of the bridge frame on the supporting base; the integral movable clear module further comprises a pump, the pump is arranged in the pump equipment installation area, the pump comprises a clear pump, and the clear pump is connected into the clear liquid conveying main pipe to form a part of the clear liquid conveying main pipe;

and/or the backflushing medium input structure of the backflushing device comprises a backflushing liquid input structure and a compressed gas input structure, a backflushing liquid overflow port is further arranged on the shell of the backflushing device, the backflushing liquid overflow port is connected to the output port of the clear liquid conveying main pipe through a backflushing liquid overflow pipe, the whole output port of the clear liquid conveying main pipe is higher than the backflushing liquid overflow port, and a rising section is arranged on the backflushing liquid overflow pipe;

And/or the functional container equipment group comprises a heat exchange cooler, wherein a clear liquid channel and a cooling medium channel which are separated from each other through a heat exchange wall are arranged in the heat exchange cooler, a clear liquid inlet and a clear liquid outlet which are respectively connected with two ends of the clear liquid channel are arranged on a shell of the heat exchange cooler, a cooling medium inlet and a cooling medium outlet which are respectively connected with two ends of the cooling medium channel are also arranged on the shell of the heat exchange cooler, and the clear liquid inlet and the clear liquid outlet are connected in series on the clear liquid conveying main pipe so that the clear liquid channel forms a part of the clear liquid conveying main pipe.