CN217288415U

CN217288415U - Production equipment for synthesizing lithium iron phosphate by hydrothermal method

Info

Publication number: CN217288415U
Application number: CN202221041977.4U
Authority: CN
Inventors: �田一弘
Original assignee: Shenzhen Warren New Energy Technology Co ltd
Current assignee: Shenzhen Warren New Energy Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-26
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to the technical field of lithium battery raw material preparation, in particular to a production device for synthesizing lithium iron phosphate by a hydrothermal method, which comprises a first stirring device, a preheating device, a second stirring device and a drying device, wherein the number of the first stirring devices is two, the preheating device comprises a shell, a heating box, two feeding pumps, two first transmission components and a plurality of first heating pipes, the two first transmission components comprise a feeding pipeline, a discharging pipeline and a plurality of transmission branch pipes, the heating area of the slurry is increased, the efficiency of heat conduction is accelerated, the heating effect is improved, the transmission branch pipes are arranged at equal intervals, the heating of the slurry in the transmission branch pipes is uniform, the heating effect is ensured, the heating time of the slurry can be shortened through the arrangement of the preheating device, and the heating effect is improved.

Description

Production equipment for synthesizing lithium iron phosphate by hydrothermal method

Technical Field

The utility model relates to a lithium battery raw materials preparation technical field specifically is a production facility that relates to synthetic lithium iron phosphate of hydrothermal method.

Background

Lithium iron phosphate having an olivine structure has received great attention in the field of secondary lithium ion batteries because of its safety, low cost, and environmental friendliness. In the prior art, the technical route for synthesizing lithium ferric manganese phosphate mainly comprises two types, one type is a solid-phase method, the basic principle of the method is that solid-phase synthesis reaction occurs between solid reactant particles through surface diffusion at high temperature, and the particle control of a product and the batch stability of the product need to be improved; the other type is a liquid phase method, the first slurry is obtained by mixing lithium phosphate and water, the second slurry is obtained by mixing ferrous sulfate, manganese sulfate and water, the two slurries are mixed and heated, and finally, lithium manganese iron phosphate powder is obtained by drying a mixed composite of the two slurries.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a production apparatus for synthesizing lithium iron phosphate by a hydrothermal method, aiming at the problems in the prior art.

For solving the prior art problem, the utility model discloses a technical scheme be:

a production device for synthesizing lithium iron phosphate by a hydrothermal method comprises two first stirring devices, a preheating device, two second stirring devices and a drying device, wherein the preheating device comprises a shell, a heating box, two feeding pumps, two first transmission assemblies and a plurality of first heating pipes, the shell is positioned between the two first stirring devices and the second stirring device, the heating box is fixedly connected inside the shell, the heating box is made of a metal material with good heat conduction, the two first transmission assemblies respectively comprise a feeding pipeline, a discharging pipeline and a plurality of transmission branch pipes, the feeding pipeline and the discharging pipeline are respectively positioned at the top and the bottom of the heating box in a horizontal state, the plurality of transmission branch pipes are arranged between the feeding pipeline and the discharging pipeline in a vertical state in parallel at equal intervals, all the transmission branch pipes penetrate through the heating box, and the feeding pipelines of the two first transmission assemblies are respectively communicated with the two first stirring devices, two charge pumps are respectively positioned between the feed pipelines of the two first stirring devices and the two first transmission assemblies, the two discharge pipelines are communicated with the second stirring device, and the plurality of first heating pipes are horizontally arranged and penetrate through the heating box.

Preferably, the side of each of the two first transmission assemblies is provided with a second transmission assembly, the second transmission assemblies and the first transmission assemblies are completely consistent in structure, the side of the shell is provided with a cleaning assembly, the cleaning assembly comprises a water storage tank, a water inlet pipe, a water outlet pipe, a wastewater tank, four first reversing valves and four second reversing valves, the four first reversing valves are respectively sleeved on the feed pipelines of the two first transmission assemblies and the two second transmission assemblies and are close to one end of the first stirring device, the water storage tank is positioned beside the first stirring device, one end of the water inlet pipe is communicated with the water storage tank, the other end of the water inlet pipe extends to the lower part of the four first reversing valves, the four first reversing valves are respectively communicated with the water inlet pipe, the four second reversing valves are respectively sleeved on the discharge pipelines of the two first transmission assemblies and the two second transmission assemblies and are close to one end of the second stirring device, the waste water tank is located the side of second agitating unit, and the one end and the waste water tank intercommunication of outlet pipe, the other end of outlet pipe extend to the below of four second switching-over valves, and four second switching-over valves all communicate with the outlet pipe.

Preferably, all be provided with the determine module on two first transmission subassemblies and two second transmission subassemblies, all determine module all includes four temperature sensor, four third switching-over valves, four check valves and four back flows, four temperature sensor overlap respectively and locate the one end that is close to second agitating unit on two first transmission subassemblies and two second transmission subassemblies's the discharge conduit, temperature sensor's side is located to four third switching-over valve housings, four back flows all are vertical state and overlap respectively and locate the top of four third switching-over valves, the top of four back flows is located to four check valve housings, and the other end of four check valves and the one end intercommunication that first agitating unit was kept away from to the charge conduit of two first transmission subassemblies and two second transmission subassemblies.

Preferably, the heating box comprises four heating modules, the four heating modules are arranged in the shell in parallel, two first heating pipes are arranged in each heating module, and the transmission branch pipes of the two first transmission assemblies and the two second transmission assemblies are respectively located between the two first heating pipes of the four heating modules.

Preferably, all be provided with the pressure release subassembly on two first transmission subassemblies and two second transmission subassemblies, the pressure release subassembly includes the blast pipe, the exhaust-gas tank, the relief valve, and four connecting pipes, four connecting pipes are located respectively between two first transmission subassemblies and two second transmission subassemblies's ejection of compact pipeline and second agitating unit, the blast pipe is the horizontality and sets up in the top of four connecting pipes, and four connecting pipes all communicate with the blast pipe, the exhaust-gas tank is located the side of casing, blast pipe and exhaust-gas tank intercommunication.

Preferably, the top and the bottom of the shell are both provided with a support frame, the heating box is fixedly connected to the support frame, and the shell is made of a heat-insulating material.

Preferably, the two first conveying assemblies and the two second conveying assemblies are provided with flow meters at one ends of the feeding pipelines close to the first stirring device.

Preferably, the top of first agitating unit and second agitating unit all is provided with the rotation driving motor, and the below of the rotation driving motor of first agitating unit and second agitating unit all is provided with the rotation axis that is vertical state and arranges, and the rotation axis is connected with the rotation driving motor transmission, all is provided with the stirring leaf that a plurality of surrounded in the axis of rotation axis on the rotation axis of first agitating unit and second agitating unit.

Preferably, a plurality of second heating pipes surrounding the central line of the second stirring device are further arranged in the second stirring device.

Preferably, the second stirring device is provided with a discharge pipe communicated with the drying device, the drying device is internally provided with a filter screen, and a liquid outlet pipe is arranged below the filter screen.

Compared with the prior art, the beneficial effect of this application is:

1. this application has increased the heated area of thick liquids through the setting of a plurality of transmission branch pipes, accelerates heat-conducting efficiency, improves the effect of its heating, and the equidistant setting of transmission branch pipe for the thick liquids heating in a plurality of transmission branch pipes is even, ensures the effect of heating, and through preheating device's setting, the heat time of reducible thick liquids improves the effect of heating.

2. This application need not to wait for abluent process through the structure identical setting of second transmission subassembly with first transmission subassembly, can be continuous transmit thick liquids, improve equipment's efficiency, washs the life that can prolong first transmission subassembly or second transmission subassembly simultaneously.

3. This application passes through detection device's setting, improves the heating effect of thick liquids, promotes the mixture of follow-up second agitating unit to two kinds of thick liquids.

4. This application is through the setting of four heating module to can heat two first transmission subassemblies and two second transmission subassemblies respectively, the consumption of reduction power, through two first heating pipes in every heating module, and the transmission branch pipe of first transmission subassembly and second transmission subassembly is located between two first heating pipes, make can be by even heating in the transmission branch pipe of first transmission subassembly and second transmission subassembly, improve the efficiency of heating.

5. This application can adjust the pressure in two first transmission subassemblies and two second transmission subassemblies through the setting of pressure release subassembly, prolongs the life of equipment, collects the waste gas that the thick liquids produced, can also reduce the potential safety hazard.

6. This application can play heat retaining effect to the heating box through the insulation material's of casing setting, reduces heating power's consumption, ensures the effect of heating.

7. This application is through the setting of flowmeter, and steerable thick liquids lets in the flow of first transmission subassembly and second transmission subassembly, can improve the heating efficiency of first heating pipe to the transmission branch pipe of first transmission subassembly and second transmission subassembly, conveniently controls the temperature of thick liquids.

8. This application is through the setting of filter screen and liquid storage pipe in the drying device for drying device carries out the drying to it when filtering the resultant, promotes the efficiency of production.

Drawings

FIG. 1 is a perspective view of the present application in its entirety;

FIG. 2 is a front view of the entirety of the present application;

FIG. 3 is a top view of the entirety of the present application;

FIG. 4 is a schematic perspective view of the preheating device of the present application;

FIG. 5 is a schematic perspective view of a portion of a first agitation device and cleaning assembly of the present application and an enlarged view thereof;

FIG. 6 is a perspective view of the interior of the preheating device of the present application;

FIG. 7 is a schematic perspective view of a heating cartridge of the present application;

FIG. 8 is a perspective view of a portion of the preheating device of the present application;

FIG. 9 is a front view of the first conveyance assembly, the first heating tube, and the detection assembly of the present application;

FIG. 10 is a cross-sectional structural schematic of the housing of the present application;

FIG. 11 is a schematic cross-sectional view of a first stirring device of the present application;

FIG. 12 is a schematic sectional view of a second stirring device and a drying device of the present application;

FIG. 13 is a schematic cross-sectional view of a second stirring device of the present application;

the reference numbers in the figures are:

1-a first stirring device; 1 a-a rotary drive motor; 1 b-a rotation axis; 1 c-stirring blade;

2-a preheating device; 2 a-a housing; 2a 1-scaffold; 2 b-a heating cartridge; 2b1 — first heating tube; 2b 2-heating module; 2 c-a feed pump; 2 d-a first transmission component; 2d 1-feed line; 2d 2-discharge pipe; 2d 3-transfer manifold; 2d 4-flow meter; 2 e-a second transmission assembly; 2 f-a cleaning assembly; 2f 1-water storage tank; 2f 2-water inlet pipe; 2f 3-outlet pipe; 2f 4-wastewater tank; 2f5 — first direction valve; 2f6 — second direction valve; 2 g-a detection component; 2g 1-temperature sensor; 2g 2-third direction valve; 2g 3-check valve; 2g 4-reflux tube; 2 h-pressure relief assembly; 2h 1-exhaust pipe; 2h 2-offgas tank; 2h 3-pressure relief valve; 2h 4-connecting tube;

3-a second stirring device; 3 a-a second heating pipe; 3 b-a discharge pipe; 4-a drying device; 4 a-a filter screen; 4 b-a liquid outlet pipe.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1-13, the present application provides:

a hydrothermal method synthesis lithium iron phosphate production device comprises a first stirring device 1, a preheating device 2, a second stirring device 3 and a drying device 4, wherein the first stirring device 1 comprises two, the preheating device 2 comprises a shell 2a, a heating box 2b, two feed pumps 2c, two first transmission assemblies 2d and a plurality of first heating pipes 2b1, the shell 2a is positioned between the two first stirring devices 1 and the second stirring device 3, the heating box 2b is fixedly connected inside the shell 2a, the heating box 2b is made of a metal material with good heat conduction, the two first transmission assemblies 2d respectively comprise a feeding pipeline 2d1, a discharging pipeline 2d2 and a plurality of transmission branch pipes 2d3, the feeding pipeline 2d1 and the discharging pipeline 2d2 are respectively positioned at the top and the bottom of the heating box 2b in a horizontal state, the plurality of transmission branch pipes 2d3 are vertically arranged between the feeding pipeline 2d1 and the discharging pipeline 2d2 in a parallel mode at equal intervals, and all transmission branch pipes 2d3 all run through the inside of heating box 2b, the charge-in pipeline 2d1 of two first transmission subassemblies 2d communicates with two first agitating unit 1 respectively, two feeding pumps 2c are located respectively between two first agitating unit 1 and two charge-in pipeline 2d1 of two first transmission subassemblies 2d, two ejection of compact pipelines 2d2 all communicate with second agitating unit 3, a plurality of first heating pipe 2b1 all is the inside that the horizontal state runs through heating box 2 b.

Based on the above embodiments, the technical problem to be solved by the present application is how to improve the heating effect of the slurry for synthesizing lithium iron phosphate. For this purpose, the two first stirring devices 1 are used for stirring raw materials for synthesizing lithium iron phosphate and water to respectively obtain two kinds of slurry, the two kinds of slurry are respectively conveyed to the insides of the two first conveying assemblies 2d of the preheating device 2 through the two feeding pumps 2c, the slurry firstly enters the feeding pipeline 2d1, the feeding pipeline 2d1 is used for sequentially conveying the slurry to each conveying branch pipe 2d3, at the moment, the first heating pipe 2b1 is started to increase the temperature of the slurry, the first heating pipe 2b1 penetrates through the heating box 2b, the heating box 2b is made of a metal material with good heat conduction, the metal material is preferably made of copper or aluminum alloy, the heating box 2b absorbs the heat of the first heating pipe 2b1, so that the heat absorbed by the heating box 2b conducts heat to each conveying branch pipe 2d3 penetrating through the inside of the heating box, and the slurry in the conveying branch pipes 2d3 is heated, through a plurality of transmission branch pipe 2d 3's setting, the heated area of thick liquids has been increased, heat-conduction efficiency accelerates, improve the effect of its heating, transmission branch pipe 2d 3's equidistant setting, make the thick liquids heating in a plurality of transmission branch pipe 2d3 even, ensure the effect of heating, thick liquids after the heating can be followed and discharged in the ejection of compact pipeline 2d2 in the transmission branch pipe 2d3, let in the second agitating unit 3 with thick liquids through ejection of compact pipeline 2d2, two kinds of thick liquids get into second agitating unit 3 back simultaneously, stir the mixture to two kinds of thick liquids through second agitating unit 3, the thick liquids after the mixture let in drying device 4 through second agitating unit 3, obtain lithium iron phosphate's powder through the drying, thereby accomplish the lithium iron phosphate synthesis, setting through preheating device 2, the heat duration of thick liquids can be shortened, improve the effect of heating.

As shown in fig. 4-9, further:

the side of the two first transmission assemblies 2d is provided with a second transmission assembly 2e, the structure of the second transmission assembly 2e is completely consistent with that of the first transmission assembly 2d, the side of the housing 2a is provided with a cleaning assembly 2f, the cleaning assembly 2f comprises a water storage tank 2f1, a water inlet pipe 2f2, a water outlet pipe 2f3, a wastewater tank 2f4, four first reversing valves 2f5 and four second reversing valves 2f6, the four first reversing valves 2f5 are respectively sleeved on one ends, close to the first stirring device 1, of the feeding pipes 2d1 of the two first transmission assemblies 2d and the two second transmission assemblies 2e, the water storage tank 2f1 is located at the side of the first stirring device 1, one end of the water inlet pipe 2f2 is communicated with the water storage tank 2f1, the other end of the water inlet pipe 2f2 extends to the lower parts of the four first reversing valves 2f5, and the four first reversing valves 2f5 are all communicated with the water inlet pipe 2f2, the four second reversing valves 2f6 are respectively sleeved on the discharge pipes 2d2 of the two first transmission assemblies 2d and the two second transmission assemblies 2e at one end close to the second stirring device 3, the wastewater tank 2f4 is located beside the second stirring device 3, one end of the water outlet pipe 2f3 is communicated with the wastewater tank 2f4, the other end of the water outlet pipe 2f3 extends to the lower part of the four second reversing valves 2f6, and the four second reversing valves 2f6 are communicated with the water outlet pipe 2f 3.

Based on above-mentioned embodiment, thick liquids need wash to remaining thick liquids in first transmission assembly 2d after the transmission to cause long-time use, make the inside of first transmission assembly 2d form the dirt, but unable continuous transmission thick liquids need to shut down waiting when wasing, and how the technical problem that this application wanted to solve does not influence the transmission of thick liquids when wasing first transmission assembly 2 d. For this purpose, the present application provides that the second transfer module 2e and the first transfer module 2d are configured in a completely identical manner, so that the slurry can be alternately transferred by the first transfer module 2d and the second transfer module 2e, so that the slurry can be continuously transferred, during the transfer of the first transfer module 2d, the interior of the second transfer module 2e is cleaned, and vice versa, by introducing clean water in the water storage tank 2f1 into the water inlet pipe 2f2, and selectively communicating with the water inlet pipe 2f2 through the first reversing valve 2f5 of the first transfer module 2d and the second transfer module 2e, so that the clean water can clean the interior of the first transfer module 2d or the second transfer module 2e after the slurry is transferred, and when the water flows to the end of the discharge pipe 2d2 of the first transfer module 2d or the second transfer module 2e, make the waste water after the washing let in waste water tank 2f4 through second switching-over valve 2f6, thereby accomplish the closed loop, collect the waste water after the washing is accomplished through waste water tank 2f4, filter the emission to waste water through outside filter equipment at last, first transmission assembly 2d or second transmission assembly 2e that do not wash simultaneously can continue to select to communicate with first agitating unit 1, thereby need not to wait for abluent process, can be continuous transmit the thick liquids, the efficiency of the equipment is improved, wash the life that can prolong first transmission assembly 2d or second transmission assembly 2e simultaneously.

As shown in fig. 3, 4, 6, 8 and 9, further:

the two first transmission assemblies 2d and the two second transmission assemblies 2e are respectively provided with a detection assembly 2g, all the detection assemblies 2g comprise four temperature sensors 2g1, four third reversing valves 2g2, four one-way valves 2g3 and four return pipes 2g4, the four temperature sensors 2g1 are respectively sleeved on the discharge pipelines 2d2 of the two first transmission assemblies 2d and the two second transmission assemblies 2e and are close to one end of the second stirring device 3, the four third reversing valves 2g2 are sleeved on the lateral sides of the temperature sensors 2g1, the four return pipes 2g4 are respectively sleeved above the four third reversing valves 2g2 in a vertical state, the four one-way valves 2g3 are sleeved on the top ends of the four return pipes 2g4, and the other ends of the four check valves 2g3 are communicated with the ends of the feed pipes 2d1 of the two first conveying assemblies 2d and the two second conveying assemblies 2e away from the first stirring device 1.

Based on the above-mentioned embodiments, the technical problem that the present application intends to solve is how to ensure that the slurry transferred into the second stirring device 3 is exactly within the temperature range of the desired process. For this purpose, the present application performs temperature detection on the slurry flowing to the second stirring device 3 through the discharge pipe 2d2 of the first conveying assembly 2d or the second conveying assembly 2e by the arrangement of the temperature sensor 2g1, when the temperature detection cannot reach the temperature range of the required process, the slurry is guided into the return pipe 2g4 above the temperature detection through the arrangement of the third reversing valve 2g2, the slurry can only flow back to the feed pipe 2d1 of the first conveying assembly 2d or the second conveying assembly 2e in a single-side manner through the arrangement of the one-way valve 2g3, the slurry can be returned to the discharge pipe 2d2 of the first conveying assembly 2d or the second conveying assembly 2e again, the temperature of the slurry is adjusted through the first heating pipe 2b1 until the temperature of the slurry meets the temperature range required by the process, and the heating effect of the slurry is improved through the arrangement of the detection device, the subsequent second stirring device 3 is promoted to mix the two slurries.

As shown in fig. 7, further:

the heating box 2b comprises four heating modules 2b2, the four heating modules 2b2 are arranged in parallel inside the housing 2a, two first heating pipes 2b1 are arranged in each heating module 2b2, and the two first conveying assemblies 2d and the two conveying branch pipes 2d3 of the two second conveying assemblies 2e are respectively located between the two first heating pipes 2b1 of the four heating modules 2b 2.

Based on the above-mentioned embodiment, because two first transmission subassemblies 2d and two second transmission subassemblies 2e are alternative to be carried out the transmission to thick liquids, if the setting that heating box 2b is whole, can cause first transmission subassembly 2d and second transmission subassembly 2e when wasing its inside, still can be heated and cause inside temperature control unstable, consume great power simultaneously, the technical problem that this application wanted to solve is how alone to heat two first transmission subassemblies 2d and two second transmission subassemblies 2 e. For this purpose, the present application provides four heating modules 2b2, so that two first conveying assemblies 2d and two second conveying assemblies 2e can be heated respectively, so that when two first conveying assemblies 2d or one of two second conveying assemblies 2e is in a cleaning state, power consumption can be reduced by closing the first heating pipes 2b1 in the heating modules 2b2, and by two first heating pipes 2b1 in each heating module 2b2, and the conveying branch pipes 2d3 of the first conveying assemblies 2d and the second conveying assemblies 2e are located between the two first heating pipes 2b1, so that the conveying branch pipes 2d3 of the first conveying assemblies 2d and the second conveying assemblies 2e can be uniformly heated, and heating efficiency is improved.

As shown in fig. 8, further:

all be provided with pressure relief subassembly 2h on two first transmission subassemblies 2d and two second transmission subassemblies 2e, pressure relief subassembly 2h includes blast pipe 2h1, exhaust-gas tank 2h2, relief valve 2h3, and four connecting pipes 2h4, four connecting pipes 2h4 are located respectively between discharge pipe 2d2 and the second agitating unit 3 of two first transmission subassemblies 2d and two second transmission subassemblies 2e, blast pipe 2h1 is the horizontality and sets up in the top of four connecting pipes 2h4, and four connecting pipes 2h4 all communicate with blast pipe 2h1, exhaust-gas tank 2h2 is located the side of casing 2a, blast pipe 2h1 communicates with exhaust- gas tank 2h 2.

Based on the above embodiment, two first transmission assemblies 2d and two second transmission assemblies 2e can produce waste gas in the heating process, and how the waste gas is discharged untimely can cause the pressure inside two first transmission assemblies 2d and two second transmission assemblies 2e to be great, and influences the service life of the equipment, and the technical problem that this application wants to solve is how to discharge the waste gas in the first transmission assemblies 2d and the second transmission assemblies 2 e. For this reason, this application is through the setting of four connecting pipes 2h4, when the slurry that is heated flows to connecting pipe 2h4 department, the waste gas that the heated slurry produced is collected by blast pipe 2h1 above it, carry to in waste gas tank 2h2 at last, collect the waste gas that the slurry produced through waste gas tank 2h2, slurry is then transmitted to in second agitating unit 3 through connecting pipe 2h4, through the setting of relief valve 2h3, can adjust the pressure in two first transmission subassemblies 2d and two second transmission subassemblies 2e, the life of extension equipment, can also reduce the potential safety hazard.

As shown in fig. 10, further:

the top and the bottom of the shell 2a are both provided with a support frame 2a1, the heating box 2b is fixedly connected on the support frame 2a1, and the shell 2a is made of heat-insulating materials.

Based on the above embodiments, the technical problem that the present application intends to solve is how to reduce the consumption of heating power. Therefore, the heat preservation effect of the heating box 2b can be achieved through the arrangement of the heat preservation material of the shell 2a, the consumption of heating power is reduced, the heating effect is ensured, and the installation of the heating box 2b is facilitated through the support frame 2a1 in the shell 2 a.

As shown in fig. 9, further:

the ends of the two first conveying assemblies 2d and the two second conveying assemblies 2e feeding pipes 2d1 close to the first stirring device 1 are provided with flow meters 2d 4.

Based on the above-mentioned embodiments, the technical problem that the present application intends to solve is how to control the flow rate of the slurry into the first transferring assembly 2d and the second transferring assembly 2 e. Therefore, the flow rate of the slurry flowing into the first conveying component 2d and the second conveying component 2e can be controlled by setting the flow meter 2d4, the heating efficiency of the first heating pipe 2b1 on the conveying branch pipes 2d3 of the first conveying component 2d and the second conveying component 2e can be improved, and the temperature of the slurry can be conveniently controlled.

As shown in fig. 11-13, further:

the top of first agitating unit 1 and second agitating unit 3 all is provided with rotation driving motor 1a, and the below of rotation driving motor 1a of first agitating unit 1 and second agitating unit 3 all is provided with the rotation axis 1b that is vertical state and arranges, and rotation axis 1b and rotation driving motor 1a transmission are connected, all is provided with the stirring leaf 1c that a plurality of encircles in the axis of rotation axis 1b on the rotation axis 1b of first agitating unit 1 and second agitating unit 3.

Based on the above-described embodiments, the technical problem that the present application intends to solve is how the first stirring device 1 and the second stirring device 3 are mixed with respect to the raw material pieces. For this purpose, in the present application, the rotation driving motor 1a drives the rotation shaft 1b to rotate, the rotation shaft 1b drives the plurality of stirring blades 1c to rotate, the stirring blades 1c sufficiently mix the raw materials in the first stirring device 1 and the second stirring device 3, preferably, a plurality of rotation shafts 1b are arranged inside the first stirring device 1 and the second stirring device 3, the plurality of rotation shafts 1b can be connected through a gear, and the stirring blades 1c on the plurality of rotation shafts 1b are staggered with each other, so that the stirring blades 1c on the plurality of rotation shafts 1b can simultaneously rotate, and the rotation directions between the plurality of rotation shafts 1b are opposite, so that the slurry can violently oscillate in the first stirring device 1 and the second stirring device 3, thereby increasing the contact area of the slurry in the first stirring device 1 and the second stirring device 3, the efficiency of stirring is improved.

As shown in fig. 13, further:

a plurality of second heating pipes 3a surrounding the central line of the second stirring device 3 are also arranged in the second stirring device 3.

Based on the above embodiment, when the second stirring device 3 mixes two kinds of slurry, the temperature of the slurry needs to be maintained, and the technical problem to be solved by the present application is how to maintain the temperature of the slurry in the second stirring device 3. For this reason, this application can heat the thick liquids in the second agitating unit 3 through the setting of second heating pipe 3a to the heat retaining effect of playing promotes the abundant reaction of two kinds of thick liquids.

As shown in fig. 12, further:

the second stirring device 3 is provided with a discharge pipe 3b communicated with the drying device 4, a filter screen 4a is arranged in the drying device 4, and a liquid outlet pipe 4b is arranged below the filter screen 4 a.

Based on the above embodiment, the product generated after the stirring by the second stirring device 3 needs to be filtered, and the technical problem to be solved by the present application is how to filter and dry the slurry generated by the second stirring device 3. For this reason, this application is discharged its inside resultant into drying device 4 through arranging material pipe 3b in, filter production thing through the filter screen in drying device 4, the production thing after the filtration is dried by drying device 4 and is finally generated the powder of lithium iron phosphate, its filterable liquid passes through filter screen 4a stock solution pipe and discharges outside drying device 4, collect the liquid after the filtration through outside device, can retrieve the lithium phosphate in the liquid, thereby reduce manufacturing cost's waste, through the setting of filter screen 4a and stock solution pipe, make drying device 4 dry to it when filtering the resultant, can promote the efficiency of production.

The above embodiments only represent one or several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a hydrothermal method synthetic lithium iron phosphate's production facility, including first agitating unit (1), preheating device (2), second agitating unit (3) and drying device (4), a serial communication port, first agitating unit (1) has two, preheating device (2) are including casing (2a), heat box (2b), two charge-pump (2c), two first transmission subassemblies (2d) and a plurality of first heating pipe (2b1), casing (2a) are located between two first agitating unit (1) and second agitating unit (3), heat box (2b) fixed connection is in the inside of casing (2a), heat box (2b) are good metal material of heat conduction and make, two first transmission subassemblies (2d) all include charge-in pipeline (2d1), ejection of compact pipeline (2d2) and a plurality of transmission branch pipe (2d3), charge-in pipeline (2d1) and ejection of compact pipeline (2d2) all are the horizontality and are located heat box (2b) respectively ) The top and the bottom of, a plurality of transmission branch pipe (2d3) are the equidistant side by side of vertical state and set up between charge-in pipeline (2d1) and ejection of compact pipeline (2d2), and all transmission branch pipe (2d3) all run through the inside through heating box (2b), charge-in pipeline (2d1) of two first transmission subassemblies (2d) communicate with two first agitating unit (1) respectively, two feeding pump (2c) are located respectively between charge-in pipeline (2d1) of two first agitating unit (1) and two first transmission subassemblies (2d), two ejection of compact pipelines (2d2) all communicate with second agitating unit (3), a plurality of first heating pipe (2b1) all are the inside that the horizontal state runs through heating box (2 b).

2. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 1, wherein the second transmission assemblies (2e) are arranged beside the two first transmission assemblies (2d), the structures of the second transmission assemblies (2e) and the first transmission assemblies (2d) are completely consistent, the cleaning assembly (2f) is arranged beside the shell (2a), the cleaning assembly (2f) comprises a water storage tank (2f1), a water inlet pipe (2f2), a water outlet pipe (2f3), a wastewater tank (2f4), four first reversing valves (2f5) and four second reversing valves (2f6), the four first reversing valves (2f5) are respectively sleeved on the feeding pipelines (2d1) of the two first transmission assemblies (2d) and the two second transmission assemblies (2e), the end of the four first reversing valves (2f5) is close to the first stirring device (1), and the water storage tank (2f1) is arranged beside the first stirring device (1), one end of a water inlet pipe (2f2) is communicated with a water storage tank (2f1), the other end of the water inlet pipe (2f2) extends to the lower portion of four first reversing valves (2f5), the four first reversing valves (2f5) are communicated with the water inlet pipe (2f2), the four second reversing valves (2f6) are respectively sleeved on the discharge pipelines (2d2) of the two first transmission assemblies (2d) and the two second transmission assemblies (2e) and close to one end of the second stirring device (3), the waste water tank (2f4) is located beside the second stirring device (3), one end of a water outlet pipe (2f3) is communicated with the waste water tank (2f4), the other end of the water outlet pipe (2f3) extends to the lower portion of the four second reversing valves (2f6), and the four second reversing valves (2f6) are communicated with the water outlet pipe (2f 3).

3. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 2, wherein the two first conveying assemblies (2d) and the two second conveying assemblies (2e) are respectively provided with a detection assembly (2g), all the detection assemblies (2g) comprise four temperature sensors (2g1), four third reversing valves (2g2), four one-way valves (2g3) and four return pipes (2g4), the four temperature sensors (2g1) are respectively sleeved on one ends, close to the second stirring device (3), of the discharge pipelines (2d2) of the two first conveying assemblies (2d) and the two second conveying assemblies (2e), the four third reversing valves (2g2) are sleeved on the sides of the temperature sensors (2g1), the four return pipes (2g4) are respectively sleeved above the four third reversing valves (2g2) in a vertical state, the four check valves (2g3) are sleeved at the top ends of the four return pipes (2g4), and the other ends of the four check valves (2g3) are communicated with one ends, far away from the first stirring device (1), of the feeding pipelines (2d1) of the two first transmission assemblies (2d) and the two second transmission assemblies (2 e).

4. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 2, wherein the heating box (2b) comprises four heating modules (2b2), the four heating modules (2b2) are arranged in parallel inside the casing (2a), two first heating pipes (2b1) are arranged in each heating module (2b2), and the two first conveying assemblies (2d) and the two conveying branch pipes (2d3) of the second conveying assembly (2e) are respectively located between the two first heating pipes (2b1) of the four heating modules (2b 2).

5. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 2, wherein the two first transmission assemblies (2d) and the two second transmission assemblies (2e) are respectively provided with a pressure relief assembly (2h), the pressure relief assembly (2h) comprises an exhaust pipe (2h1), an exhaust gas tank (2h2), a pressure relief valve (2h3) and four connecting pipes (2h4), the four connecting pipes (2h4) are respectively arranged between the discharge pipelines (2d2) of the two first transmission assemblies (2d) and the two second transmission assemblies (2e) and the second stirring device (3), the exhaust pipe (2h1) is arranged above the four connecting pipes (2h4) in a horizontal state, and the four connecting pipes (2h4) are communicated with an exhaust pipe (2h1), the exhaust gas tank (2h2) is positioned at the side of the shell (2a), and the exhaust pipe (2h1) is communicated with the exhaust gas tank (2h 2).

6. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 1, wherein support frames (2a1) are arranged at the top and the bottom of the shell (2a), the heating box (2b) is fixedly connected to the support frames (2a1), and the shell (2a) is made of a heat-insulating material.

7. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 2, wherein flow meters (2d4) are arranged at one ends, close to the first stirring device (1), of the two first conveying assemblies (2d) and the two feeding pipelines (2d1) of the second conveying assembly (2 e).

8. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 1, wherein rotary driving motors (1a) are arranged at the tops of the first stirring device (1) and the second stirring device (3), rotary shafts (1b) which are arranged in a vertical state are arranged below the rotary driving motors (1a) of the first stirring device (1) and the second stirring device (3), the rotary shafts (1b) are in transmission connection with the rotary driving motors (1a), and a plurality of stirring blades (1c) which encircle the axis of the rotary shafts (1b) are arranged on the rotary shafts (1b) of the first stirring device (1) and the second stirring device (3).

9. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 8, wherein a plurality of second heating pipes (3a) surrounding the central line of the second stirring device (3) are further arranged in the second stirring device (3).

10. The production equipment for synthesizing lithium iron phosphate by the hydrothermal method according to claim 1, wherein a discharge pipe (3b) is arranged on the second stirring device (3) and communicated with the drying device (4), a filter screen (4a) is arranged in the drying device (4), and a liquid outlet pipe (4b) is arranged below the filter screen (4 a).