CN222585564U

CN222585564U - A spray drying equipment

Info

Publication number: CN222585564U
Application number: CN202420644989.9U
Authority: CN
Inventors: 张涛; 陈旭东
Original assignee: Ningbo Ronbay Lithium Battery Material Co Ltd
Current assignee: Ningbo Ronbay Lithium Battery Material Co Ltd
Priority date: 2024-03-29
Filing date: 2024-03-29
Publication date: 2025-03-11
Anticipated expiration: 2034-03-29

Abstract

The utility model discloses spray drying equipment which comprises a hearth body, an air inlet pipe, a liquid inlet pipe, an atomizing nozzle and a plurality of air outlet pipes, wherein the atomizing nozzle is arranged at the top of the hearth body and communicated with the air inlet pipe and the liquid inlet pipe, the air outlet pipes are annularly arranged on the inner side wall of the hearth body and communicated with the air inlet pipe, each air outlet pipe is arranged along a first direction, at least one linear air outlet towards the central axis of the hearth body is formed on one side of each air outlet pipe towards the central axis of the hearth body, and a certain angle theta is formed at the air outlet end of each linear air outlet relative to the axis of the air outlet pipe body.

Description

Spray drying equipment

Technical Field

The utility model relates to the technical field of reaction furnaces, in particular to spray drying equipment.

Background

Spray pyrolysis is taken as a novel process, powder materials are researched as a traditional process from the last century, and is gradually applied to preparing ternary materials along with the development of new energy material markets in recent years, and the spray pyrolysis has the advantages that metal salt or a mixed solution thereof can be directly adopted to synthesize a precursor and a positive electrode material, so that the spray pyrolysis has the advantages of short flow, low cost, no pollution source emission, controllable product granularity, good uniformity, suitability for doping and the like.

At present, the process equipment for preparing the anode material or the precursor by spray pyrolysis is single in hearth structure, and an atomizing nozzle for atomizing is usually arranged in the hearth, but after the matrix solution is atomized by the atomizing nozzle, atomized fog drops of the matrix solution fall to the bottom of the hearth rapidly, so that the residence time of the fog drops atomized by the matrix solution in the hearth is short, the drying time of the atomized fog drops is short, the utilization rate of the fog drops by the whole hearth is low, and the resource waste is caused.

Disclosure of utility model

The utility model discloses spray drying equipment which is used for improving the overall use efficiency of a hearth.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides spray drying equipment, which comprises a hearth body, an air inlet pipe, a liquid inlet pipe, an atomizing nozzle and a plurality of air outlet pipes;

The plurality of atomizing nozzles are arranged at the top of the hearth body, are communicated with the air inlet pipe and the liquid inlet pipe, and the plurality of air outlet pipes are annularly arranged on the inner side wall of the hearth body and are communicated with the air inlet pipe;

Each air outlet pipe is arranged along a first direction, the first direction is the direction of the top of the hearth body pointing to the bottom, and each air outlet pipe faces one side of the central axis of the hearth body, at least one linear air outlet facing to the central axis of the hearth body is formed, a certain angle theta is formed at the air outlet end of the linear air outlet relative to the axis of the air outlet pipe body, and the angle theta can be changed along with the direction of the opening of the linear air outlet.

According to the application, the plurality of air outlet pipes are annularly arranged on the inner side wall of the hearth body, the plurality of air outlet pipes are arranged up and down along the axial direction of the hearth body, the linear air outlet is formed on the air outlet pipe, meanwhile, the angle of the linear air outlet can be changed according to actual use, on the basis, the plurality of linear air outlet are matched with each other, so that an annular turbulence air flow field is formed inside the hearth body, mist drops generated by the atomizing nozzle can be interfered in the falling process, the mist drops can irregularly move inside the hearth body, the time for the mist drops to fall to the bottom of the hearth body is delayed, the overlong stay time can be effectively prolonged, the drying/pyrolysis time of the mist drops inside the high-temperature hearth can be effectively increased, the drying/pyrolysis utilization rate of the mist drops is higher, and the waste of resources is reduced.

In some embodiments, the angle θ formed by the outlet end of the linear outlet with respect to the axis of the outlet tube body satisfies the range of 0+.gtoreq.90 °.

In some embodiments, an angle θ of the linear air outlet formed on one of the air outlet pipes is a first angle, and an angle θ of the linear air outlet formed on the other air outlet pipe is a second angle, where the first angle is different from the second angle.

In some embodiments, the plurality of atomizing nozzles are distributed on the top of the hearth body in a ring-shaped structure along the second direction, the plurality of atomizing nozzles form a plurality of ring-shaped structures, the plurality of ring-shaped structures are arranged at intervals, and the second direction is the direction of the center pointing edge of the hearth body.

In some embodiments, the radius of the hearth body is r, the number of the atomizing nozzles is x, and the relationship between x and r satisfies 1+4 (r-1). Ltoreq.x.ltoreq.1+10 (r-1).

In some embodiments, the air inlet pipe comprises an air inlet main pipe, a plurality of air inlet branch pipes and a second regulating and controlling component, wherein one ends of the air inlet branch pipes are communicated with the air inlet main pipe, the other ends of the air inlet branch pipes are respectively connected with the air outlet pipe and the atomizing nozzle, one air outlet pipe is arranged in a one-to-one correspondence manner, the second regulating and controlling component is arranged in the air inlet branch pipes, any one of the second regulating and controlling component is in a one-to-one correspondence manner with any one of the air inlet branch pipes, and the second regulating and controlling component comprises a gas flowmeter and a speed control valve and is used for regulating and controlling the air pressure and the frequency of conveying gas in any one air outlet pipe.

In some embodiments, the pressure P of the gas delivered inside the outlet pipe satisfies the relationship 1.ltoreq.P.ltoreq.10bar.

In some embodiments, the frequency of delivering gas inside the outlet pipe is 10-120 times/min.

In some embodiments, the liquid inlet pipe comprises a liquid inlet main pipe, a plurality of liquid inlet branch pipes and a first regulating and controlling component, wherein one ends of the liquid inlet branch pipes are communicated with the liquid inlet main pipe, the other ends of the liquid inlet branch pipes are respectively communicated with the atomizing nozzle, the first regulating and controlling component is arranged in the liquid inlet branch pipes, any one of the first regulating and controlling component corresponds to any one of the liquid inlet branch pipes one to one, and the first regulating and controlling component comprises a liquid flowmeter and a controllable flow rate valve.

In some embodiments, the outlet tube is circular, or rectangular in cross-section.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a spray drying apparatus according to the present utility model;

FIG. 2 is a schematic view of the structure of a hearth body in a spray drying apparatus according to the present utility model;

FIG. 3 is a schematic view of a part of the structure of an air outlet pipe of spray drying equipment provided by the utility model;

FIG. 4 is a top view of a portion of a spray drying apparatus according to the present utility model;

fig. 5 is a schematic diagram of movement of droplets in a hearth body of spray drying equipment according to the present utility model.

Wherein, the furnace comprises a 1-furnace body, a 2-air outlet pipe, a 21-linear air outlet, a 3-atomizer, a 4-liquid inlet main pipe, a 41-first regulating and controlling component, a 42-liquid inlet branch pipe, a 5-air inlet main pipe, a 51-second regulating and controlling component and a 52-air inlet branch pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. In the description of the embodiment of the present utility model, unless otherwise indicated, "/" means or, for example, a/B may represent a or B, and "and/or" in the text is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B, and that three cases of a alone, a and B together, and B alone exist, and further, in the description of the embodiment of the present utility model, "a plurality" means two or more.

The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of embodiments of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.

As shown in fig. 1-2, the embodiment of the utility model provides spray drying equipment, which comprises a hearth body 1, an air inlet pipe, a liquid inlet pipe, an atomizing nozzle 3 and a plurality of air outlet pipes 2;

The plurality of atomizing nozzles 3 are arranged at the top of the hearth body 1 and are communicated with the air inlet pipe and the liquid inlet pipe, and the plurality of air outlet pipes 2 are annularly arranged on the inner side wall of the hearth body 1 and are communicated with the air inlet pipe;

Each air outlet pipe 2 is arranged along a first direction, the first direction is the direction of the top of the hearth body 1 pointing to the bottom, at least one linear air outlet 21 facing to the central axis of the hearth body 1 is formed on one side of each air outlet pipe 2 facing to the central axis of the hearth body 1, a certain angle theta is formed at the air outlet end of the linear air outlet 21 relative to the axis of the air outlet pipe 2 body, and the angle theta can be changed along with the opening direction of the linear air outlet.

According to the application, the inner side wall of the hearth body 1 is annularly provided with the plurality of air outlet pipes 2, the plurality of air outlet pipes 2 are arranged up and down along the axial direction of the hearth body 1, the air outlet pipes 2 are provided with the linear air outlets 21, meanwhile, the angle of the linear air outlets 21 can be changed according to actual use, on the basis, the plurality of linear air outlets 21 are matched with each other, so that an annular turbulence airflow field is formed inside the hearth body 1, mist drops generated by the atomizing nozzle 3 are interfered in the falling process, the mist drops can irregularly move inside the hearth body 1, the time for the mist drops to fall to the bottom of the hearth body 1 is prolonged, the overlong residence time is prolonged, the drying/pyrolysis time of the mist drops inside a high-temperature hearth can be effectively increased, the drying/pyrolysis utilization rate of the mist drops is higher, and the waste of resources is reduced.

In a possible implementation manner, referring to fig. 3, the angle θ formed by the air outlet end of the linear air outlet 21 relative to the axis of the body of the air outlet pipe 2 is more than or equal to 0 ° and less than or equal to 90 °, and in the above structure, the angle formed by the air outlet end of the linear air outlet 21 relative to the axis of the body of the air outlet pipe 2 is set to be a changeable angle, so that the air outlet pipe 2 in the application can adapt to different working conditions, and different angles can be changed according to actual requirements, thereby meeting the practicability of the application.

In a possible implementation manner, the angle θ of the linear air outlet 21 formed on one air outlet pipe 2 is a first angle, the angle θ of the linear air outlet 21 formed on the other air outlet pipe 2 is a second angle, the first angle is different from the second angle, and the angle of the linear air outlet 21 formed on each air outlet pipe 2 can be changed according to actual needs, which is not particularly limited in the application.

In a possible implementation manner, please refer to fig. 4 and fig. 5, a plurality of atomizing nozzles 3 are distributed on the top of the hearth body 1 in a circular structure along a second direction, the circular structures formed by the atomizing nozzles 3 are a plurality of, and the circular structures are arranged at intervals, and the center of the hearth body 1 points to the edge direction in the second direction.

In a possible implementation manner, the radius of the hearth body 1 is r, the number of the atomizing nozzles 3 is x, wherein the relation between x and r is satisfied that 1+4 (r-1) is not less than x and not more than 1+10 (r-1), in the structure, in order to ensure the dispersion range of the atomizing nozzles 3, more atomizing nozzles 3 are needed, but the atomizing nozzles 3 are too many, and the phenomenon that the mist drops sprayed by the atomizing nozzles 3 overlap and are remelted can occur, so that the atomization effect is influenced, therefore, the atomizing nozzles 3 in the application need to limit the number of the atomizing nozzles 3 according to the radius of the hearth body 1, so that the dispersion range of the atomizing nozzles 3 is satisfied, and meanwhile, the overlapping of the mist drops is reduced, and the fact that the number of the atomizing nozzles 33 in the application is more than or equal to 1+4 (r-1) is not more than x and not more than 1+6 (r-1) is worth noting that the atomization effect of the atomizing nozzles 3 is better.

In a possible implementation manner, please refer to fig. 1, the air inlet pipe includes an air inlet main pipe 5, a plurality of air inlet branch pipes 52 and a second regulating and controlling component 51, one end of each of the plurality of air inlet branch pipes 52 is communicated with the air inlet main pipe 5, the other end is respectively connected with the air outlet pipe 2 and the atomizer 3, wherein each air outlet pipe 2 is uniformly and correspondingly provided with one air inlet branch pipe 52, the second regulating and controlling component 51 is arranged in the air inlet branch pipe 52, any one of the second regulating and controlling components 51 is in one-to-one correspondence with any one of the air inlet branch pipes 52, the second regulating and controlling component 51 includes a gas flowmeter and a speed control valve and is used for regulating and controlling the gas pressure and the frequency of the conveying gas in any one air outlet pipe 2, wherein one part of the air inlet branch pipes 52 is used for connecting with the air outlet pipe 2 so as to ensure that the air outlet pipe 2 can blow out better, and the other part is used for connecting with the atomizer 3 so as to provide necessary gas pressure for the atomizer 3.

In a possible implementation manner, the air pressure P of the air conveyed inside the air outlet pipe 2 meets the following relation that P is more than or equal to 1 and less than or equal to 10bar, and firstly, the air pressure of the air conveyed inside the air outlet pipe 2 is set to be a variable range, so that when the air-conditioner is actually used, a worker can continuously change the air pressure of the air in the air outlet pipe 2, and further find specific parameters suitable for hearth bodies 1 with different sizes.

In a possible implementation manner, the frequency of the gas conveyed inside the gas outlet pipe 2 is 10-120 times/min, and in the design, the frequency of the gas conveyed inside the gas outlet pipe 2 is set to be a variable range, so that when the gas-conveying device is actually used, a worker can continuously change the frequency of the gas in the gas outlet pipe 2, and further find specific parameters suitable for hearth bodies 1 with different sizes.

In a possible implementation manner, the liquid inlet pipe comprises a liquid inlet main pipe 4, a plurality of liquid inlet branch pipes 42 and a first regulating and controlling component 41, wherein one ends of the liquid inlet branch pipes 42 are communicated with the liquid inlet main pipe 4, the other ends of the liquid inlet branch pipes are respectively communicated with the atomizing nozzle 3, the first regulating and controlling component 41 is arranged in the liquid inlet branch pipes 42, any one of the first regulating and controlling components 41 corresponds to any one of the liquid inlet branch pipes 42 one by one, and the first regulating and controlling component 41 comprises a liquid flowmeter and a controllable flow rate valve.

In a possible implementation manner, the cross section of the air outlet pipe 2 is circular or rectangular, so that the application is not particularly limited, as long as the air outlet pipe 2 in the application can normally blow air to the hearth body 1, the air blown by the air outlet pipe 2 can be ensured to be sufficiently blown away, the falling time of the mist drops in the hearth body 1 can be effectively prolonged, and the pyrolysis efficiency can be improved.

In a possible implementation manner, the equipment provided by the application is used, wherein the specific method comprises the steps of taking a nickel cobalt manganese salt solution as a matrix solution, carrying out spray pyrolysis on the matrix solution by adopting the spray drying equipment, collecting materials after separation, recovering acid gas, drying, crushing and screening the materials to obtain nickel cobalt manganese metal oxide, and carrying out sintering treatment on the nickel cobalt manganese metal oxide to obtain the anode material.

Wherein the sintering treatment comprises single-stage sintering, the sintering temperature of the single-stage sintering is 600-800 ℃, and the sintering time is 3-10 h. Or alternatively

The sintering treatment comprises multi-stage sintering, wherein the temperature of a heat preservation section in the multi-stage sintering is 400-600 ℃, and the sintering temperature is 700-800 ℃.

1. First, two comparative examples were performed with the existing conventional atomization scheme;

Comparative example one:

first, a pyrolysis hearth with the height of 3m and the diameter of 1.2m is selected as an experimental hearth body 1, and 6 independent two-fluid atomizing spray heads 3 are arranged above the hearth body 1.

Secondly, preparing a solution by taking nickel chloride, cobalt chloride and manganese chloride as raw materials respectively and deionized water as a solvent according to the proportion of 8:1:1, wherein 1 mol/L of chloride salt (nickel cobalt manganese) solution is prepared as a base solution.

And then carrying out high-temperature spray pyrolysis by taking the main element solution as a matrix solution, adopting compressed air as carrier gas, setting the feeding rate of the plurality of atomizing nozzles 3 to be 100ml/min, the carrier gas flow rate to be 100ml/min, the atomizing pressure to be 3.0bar, and the pyrolysis temperature to be 950 ℃.

And finally, receiving materials after the reaction is finished, drying in a 100 ℃ oven, and sieving to obtain the nickel cobalt manganese metal oxide precursor.

Comparative example two:

First, a pyrolysis hearth with the height of 10m and the diameter of 3m is selected as an experimental hearth body 1, and 6 independent two-fluid atomizing spray heads 3 are arranged above the hearth body 1.

And then carrying out high-temperature spray pyrolysis by taking the main element solution as a matrix solution, adopting compressed air as carrier gas, setting the feeding rate of the plurality of atomizing nozzles 3 to be 100ml/min, the carrier gas flow rate to be 100ml/min, the atomizing pressure to be 3.0bar, and the pyrolysis temperature to be 800 ℃.

2. Specific embodiments of the present application will be described below with reference to specific data;

Embodiment one:

First, a pyrolysis hearth with the height of 3m and the diameter of 1.2m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is four, the number of air inlet branch pipes 52 respectively corresponding to the four is 4, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

Wherein, the process keeps the suspension airflow angle theta at 0 DEG, generates a advection turbulence field, and continuously feeds air to provide the turbulence field.

Embodiment two:

First, a pyrolysis hearth with the height of 3m and the diameter of 1m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is four, the number of air inlet branch pipes 52 respectively corresponding to the four is 4, the air inlet mode of the air outlet pipes 2 is to air at certain frequency intervals, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

Wherein, the process keeps the suspension air flow angle theta at 0 degree, generates a advection turbulence field, and simultaneously sets four air outlet pipes 2 to respectively provide a turbulence field at the air flow frequency of 60 times/min.

Embodiment III:

First, a pyrolysis hearth with the height of 2.5m and the diameter of 0.8m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is four, the number of air inlet branch pipes 52 respectively corresponding to the four air outlet pipes is 4, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 4 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

And then carrying out high-temperature spray pyrolysis by taking the main element solution as a matrix solution, adopting compressed air as carrier gas, setting the feeding rate of the plurality of atomizing nozzles 3 to be 150ml/min, the carrier gas flow rate to be 150ml/min, the atomizing pressure to be 3.0bar, and the pyrolysis temperature to be 800 ℃.

Wherein, the process keeps the angle theta of the suspension airflow to be 45 degrees, and four air outlet pipes 2 are arranged for continuously feeding air flow to provide turbulent flow fields.

Embodiment four:

First, a pyrolysis hearth with the height of 2.5m and the diameter of 0.8m is selected as an experimental hearth body 1, the number of air outlet pipes 2 is four, the number of air inlet branch pipes 52 respectively corresponding to the four air outlet pipes is 4, the air inlet mode of the air outlet pipes 2 is to inlet air at a certain frequency interval, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

And then carrying out high-temperature spray pyrolysis by taking the main element solution as a matrix solution, adopting compressed air as carrier gas, setting the feeding rate of the plurality of atomizing nozzles 3 to be 100ml/min, the carrier gas flow rate to be 100ml/min, the atomizing pressure to be 3.0bar, and the pyrolysis temperature to be 750 ℃.

Wherein, the process keeps the suspension air flow angle theta at 60 degrees, generates upward convection turbulence flow field, and simultaneously sets four air outlet pipes 2 to respectively provide turbulence flow field at the air flow frequency of 100 times/min.

Fifth embodiment:

First, a pyrolysis hearth with the height of 3m and the diameter of 1.8m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is 5, corresponding air inlet branch pipes 52 are 5 respectively, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

Wherein, the process keeps the angle theta of the suspension airflow to be 0 degree, and simultaneously sets 5 air outlet pipes 2 to be continuous air inlet type airflow, and provides a turbulent airflow field which is inclined upwards.

Example six:

First, a pyrolysis hearth with the height of 3m and the diameter of 1.2m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is 5, corresponding air inlet branch pipes 52 are 5 respectively, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

Wherein, the process keeps the suspension air flow angle theta to be 50 degrees, generates upward convection turbulence flow fields, and simultaneously sets 5 air outlet pipes 2 to respectively provide turbulence flow fields at the air flow frequency of 120 times/min.

Embodiment seven:

First, a pyrolysis hearth with the height of 3.5m and the diameter of 1.5m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is 6, the number of air inlet branch pipes 52 respectively corresponding to the 6 air outlet pipes 2 is 6, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

Wherein, the suspension air flow angles of the 6 hollow annular air outlet pipes 2 in the process are distributed in a way of being crossed at 50 degrees and 0 degrees, so that turbulent flow fields with advection and upward inclination angles are respectively generated, and meanwhile, the 6 air outlet pipes 2 are respectively arranged to provide interval turbulent flow fields at the air flow frequency of 60 times/min.

Example eight:

Wherein, the process keeps the angle of the suspension airflow at 0 degree, generates a advection convection turbulence field, and simultaneously sets 5 air outlet pipes 2 to respectively provide a turbulence airflow field at the airflow frequency of 120 times/min.

Example nine:

First, a pyrolysis hearth with the height of 4m and the diameter of 1.2m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is 7, corresponding air inlet branch pipes 52 are 7 respectively, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

Wherein, the suspension air flow angles of 7 hollow air outlet pipes 2 in the process are distributed in a way of being crossed at 50 degrees and 0 degrees, turbulent flow fields with advection and upward inclination angles are respectively generated, and meanwhile, the 7 air outlet pipes 2 are respectively arranged to provide a spaced turbulent flow air flow field at the air flow frequencies of 60 times/min and 120 times/min.

Example ten:

And then carrying out high-temperature spray pyrolysis by taking the main element solution as a matrix solution, adopting compressed air as carrier gas, setting the feeding rate of the plurality of atomizing nozzles 3 to be 100ml/min, the carrier gas flow rate to be 100ml/min, the atomizing pressure to be 3.0bar, and the pyrolysis temperature to be 700 ℃.

Wherein, the suspension air flow angles of 7 hollow air outlet pipes 2 in the process are 40 degrees and 0 degrees in a cross distribution, turbulence fields of advection and upward inclination angles are respectively generated, and meanwhile, the 7 air outlet pipes 2 are respectively arranged to provide a spaced turbulence air flow field at the air flow frequencies of 60 times/min and 120 times/min.

Example eleven:

First, a pyrolysis hearth with the height of 4m and the diameter of 1.2m is selected as a hearth body 1 for experiments, the number of air outlet pipes 2 is 8, the number of air inlet branch pipes 52 respectively corresponding to the air outlet pipes is 8, the air inlet mode of the air outlet pipes 2 is continuous air inlet, and 6 independent two-fluid type atomizing spray heads 3 are arranged above the hearth body 1.

The test results of the comparative examples and examples can be shown in the following table:

As can be seen from the table, the utility model adopts the 3-5m hearth body 1, can achieve the same effect as the 15-20m high hearth body 1, and prepares the qualified metal oxide precursor with the standard physicochemical property, and compared with the traditional pyrolysis hearth, the utility model has the characteristics of small equipment scale, low cost, high efficiency and the like, and has very wide industrialized application prospect.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A spray drying device, characterized in that it comprises: a furnace body, an air inlet pipe, a liquid inlet pipe, an atomizing nozzle and a plurality of air outlet pipes;

There are multiple atomizing nozzles, and the multiple atomizing nozzles are all arranged on the top of the furnace body and are connected with the air inlet pipe and the liquid inlet pipe. The multiple air outlet pipes are annularly arranged on the inner side wall of the furnace body and are connected with the air inlet pipe.

Each of the air outlet pipes is arranged along a first direction, which is the direction from the top of the furnace body to the bottom, and each of the air outlet pipes is toward the side of the central axis of the furnace body, and is provided with at least one linear air outlet toward the central axis of the furnace body, and the air outlet end of the linear air outlet forms a certain angle θ with respect to the axis of the air outlet pipe body, and the angle θ can change with the opening direction of the linear air outlet.

2 . The spray drying equipment according to claim 1 , characterized in that an angle θ formed by the outlet end of the linear outlet relative to the axis of the outlet pipe body satisfies the following range: 0°≤θ≤90°.

3. The spray drying equipment according to claim 2 is characterized in that the angle θ of the linear air outlet opened on one of the air outlet pipes is a first angle, and the angle θ of the linear air outlet opened on the other air outlet pipe is a second angle, and the first angle is different from the second angle.

4. The spray drying equipment according to claim 1 is characterized in that the multiple atomizing nozzles are distributed in a circular ring structure along the second direction on the top of the furnace body, and there are multiple circular ring structures formed by the multiple atomizing nozzles, and the multiple circular ring structures are arranged at intervals, and the second direction is the direction from the center of the furnace body to the edge.

5. The spray drying equipment according to claim 4 is characterized in that the radius of the furnace body is r, the number of the atomizing nozzles is x, and the relationship between x and r satisfies: 1+4(r-1)≤x≤1+10(r-1).

6. The spray drying equipment according to claim 1 is characterized in that the air inlet pipe includes an air inlet main pipe, multiple air inlet branch pipes and a second regulating component, one end of each of the multiple air inlet branch pipes is connected to the air inlet main pipe, and the other end is respectively connected to the air outlet pipe and the atomizing nozzle, wherein each of the air outlet pipes is provided with an air inlet branch pipe in a one-to-one correspondence, the second regulating component is arranged inside the air inlet branch pipe, and any one of the second regulating components corresponds to any one of the air inlet branch pipes in a one-to-one correspondence, the second regulating component includes a gas flow meter and a speed control valve, and is used to regulate the air pressure and frequency of the conveying gas inside any of the air outlet pipes.

7 . The spray drying equipment according to claim 6 , characterized in that the air pressure P of the transported gas inside the air outlet pipe satisfies the following relationship: 1≤P≤10 bar.

8. The spray drying equipment according to claim 6, characterized in that the frequency of gas delivery inside the gas outlet pipe is 10-120 times/min.

9. The spray drying equipment according to claim 1 is characterized in that the liquid inlet pipe includes a liquid inlet main pipe, multiple liquid inlet branch pipes and a first regulating component, wherein one end of each of the multiple liquid inlet branch pipes is connected to the liquid inlet main pipe, and the other end is respectively connected to the atomizing nozzle, the first regulating component is arranged inside the liquid inlet branch pipe, and any one of the first regulating components corresponds to any one of the liquid inlet branch pipes one by one, and the first regulating component includes a liquid flow meter and a controllable flow rate valve.

10 . The spray drying equipment according to claim 1 , wherein the cross section of the air outlet pipe is circular or rectangular.