CN221385224U - Spray drying tower and drying system - Google Patents
Spray drying tower and drying system Download PDFInfo
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- CN221385224U CN221385224U CN202323205775.6U CN202323205775U CN221385224U CN 221385224 U CN221385224 U CN 221385224U CN 202323205775 U CN202323205775 U CN 202323205775U CN 221385224 U CN221385224 U CN 221385224U
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- drying tower
- crushing
- spray drying
- diameter
- drying
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- 238000001035 drying Methods 0.000 title claims abstract description 72
- 238000001694 spray drying Methods 0.000 title claims abstract description 38
- 238000007599 discharging Methods 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 6
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000007415 particle size distribution analysis Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model provides a spray drying tower and a drying system, wherein the spray drying tower comprises a drying tower body and a crushing device; the crushing device is arranged in the drying tower body; the drying tower body comprises a drying chamber, a discharging section and a charging barrel which are connected in sequence; the drying chamber and the charging barrel are both in cylindrical structures, and the discharging section is in a structure with wide upper part and narrow lower part; a first discharge hole is arranged below the charging barrel; a first air outlet is formed in the lateral side of the discharging section; the crushing device comprises a stirring shaft and crushing blades connected with the stirring shaft, and the crushing blades are arranged at the discharging section. The drying system comprises a spray drying tower as described above. The crushing unit is added on the basis of the existing spray drying tower, and the spray drying combines with the combined action of the crushing unit, so that the spray drying process of slurry is finished, powder crushing is performed, the particle size of the material is reduced, the air flow crushing working section is omitted, the time is saved, and the efficiency is improved.
Description
Technical Field
The utility model relates to a spray drying tower and a drying system.
Background
Spray drying equipment is one of the important production facilities. For example, lithium iron phosphate is a new type of lithium ion battery cathode material, which often needs to be treated by drying, sintering, etc. during the preparation process to achieve the desired crystal morphology and particle size distribution, and spray drying equipment is required during the process.
The high-speed centrifugal spray drier is a new-type high-efficiency drying technological equipment, and its working principle is that after the air is passed through filter and heating device, it is fed into hot air distributor at the top of drying chamber, and the hot air passed through the hot air distributor is uniformly fed into the drying chamber in the form of spiral, at the same time the feed liquid is fed into centrifugal atomizer mounted at the top of drying chamber by means of feed pump. The feed liquid is dispersed into tiny mist droplets, so that the contact surface area of the feed liquid and hot air is greatly increased. The moisture evaporates rapidly in a very short time and dries into a powdery or granular product. The powdery material is discharged from the bottom of the drying chamber, the water vapor is brought out of the system by an induced draft fan, and dust in the gas from which the water vapor is discharged is captured by a cyclone separator and a water film dust remover.
At present, the spray drying equipment mainly determines the particle size through a centrifugal nozzle, the functional form is single, and in order to achieve the ideal particle size effect, the follow-up treatment is often further carried out through an airflow crushing procedure, so that the problem of low production efficiency exists.
Disclosure of utility model
The utility model aims to overcome the defects of low production efficiency existing in the prior art that the spray drying is often further processed through an airflow crushing procedure after spray drying, and provides a spray drying tower and a drying system. The crushing unit is added on the basis of the existing spray drying tower, and the spray drying combines with the combined action of the crushing unit, so that the spray drying process of slurry is finished, powder crushing is performed, the particle size of the material is reduced, the air flow crushing working section is omitted, the time is saved, and the efficiency is improved.
The utility model solves the technical problems by the following technical scheme:
In a first aspect, the present utility model provides a spray drying tower comprising a drying tower body and a crushing device; the crushing device is arranged in the drying tower body;
The drying tower body comprises a drying chamber, a discharging section and a charging barrel which are connected in sequence; the drying chamber and the charging barrel are of cylindrical structures, and the discharging section is of a structure with wide upper part and narrow lower part; a first discharge hole is formed below the charging barrel; a first air outlet is formed in the lateral side of the discharging section;
The crushing device comprises a stirring shaft and crushing blades connected with the stirring shaft, and the crushing blades are arranged at the discharging section; the ratio of the distance from the bottom end of the stirring shaft to the bottom end of the discharging section to the height of the discharging section is (0.02-0.03): 1; the ratio of the diameter of the crushing blade to the cross-sectional diameter of the discharging section where the bottom end surface of the stirring shaft is located is (0.25-0.35): 1.
In the utility model, the drying tower body is a main place for spray drying materials and can be a conventional device in the field.
In the utility model, the shape and the size of the drying tower body can be the specifications commonly used in the field.
In the present utility model, preferably, the discharging section may have a truncated cone structure with a reduced diameter. That is, the whole structure formed by the drying chamber and the discharging section can be funnel-shaped.
In the present utility model, preferably, the ratio of the diameter of the cartridge to the inner diameter of the drying chamber may be (1-2): 20, for example, 9:100.
In the present utility model, preferably, the ratio of the height of the drying chamber to the height of the discharging section may be 1:1.
In a specific embodiment, the diameter of the cartridge may be 450mm.
In a specific embodiment, the drying chamber may have an inner diameter of 5000mm.
In a specific embodiment, the height of the drying chamber may be 5000mm.
In a specific embodiment, the height of the outfeed section may be 5000mm.
In the present utility model, preferably, an atomizer may be fixedly arranged above the drying chamber; one end of the atomizer can be connected with the feeding pipeline and the air inlet pipeline respectively; the air inlet pipeline is provided with a heater; the other end of the atomizer may be provided with a nozzle facing the drying chamber.
Wherein, a slurry filter and/or a material pump can be arranged on the feeding pipe.
Wherein, the air inlet pipeline can be also provided with an air filter and/or a blower.
In the present utility model, the crushing device may be a conventional apparatus that functions as a crusher.
In the utility model, the materials and other basic dimensions of the crushing blade can be selected conventionally in the art.
In the present utility model, the crushing blade may be preferably made of stainless steel, such as stainless steel 304.
In the present utility model, preferably, the crushing blade may be in the shape of a blade composed of three blades. Or a blade composed of four or more blades.
In the present utility model, preferably, the ratio of the diameter of the crushing blade to the diameter of the drying chamber may be (0.03-0.04): 1, for example 0.034:1.
In the present utility model, preferably, the ratio of the diameter of the crushing blade to the diameter of the barrel may be (0.3-0.4): 1, for example 0.375:1.
In a specific embodiment, the diameter of the crushing blade may be 100-200mm, for example 169mm.
In the present utility model, the diameter of the crushing blade is understood to be the diameter of the projected surface pattern of the crushing blade as it rotates.
In the utility model, the installation position of the crushing blade is based on the condition that materials can be crushed uniformly and friction between the crushing blade and the drying chamber is avoided.
In the present utility model, preferably, the ratio of the diameter of the crushing blade to the cross-sectional diameter of the discharge section where the bottom end surface of the stirring shaft is located may be 0.3:1.
In the present utility model, preferably, the ratio of the distance from the bottom end of the stirring shaft to the bottom end of the discharging section to the height of the discharging section may be 0.02:1.
In a specific embodiment, the distance from the bottom end of the stirring shaft to the bottom end of the discharge section may be 100mm.
In a second aspect, the present utility model provides a drying system comprising a crushing spray drying tower as described above.
In the utility model, the drying system can further comprise a cyclone separator, and the cyclone separator can be provided with a second feeding port, a second discharging port and a second air outlet; the first air outlet may be connected to the second feed inlet.
In the utility model, the drying system can further comprise a dust remover, and the dust remover can be provided with a third feed inlet and a third air outlet; the first air outlet can be connected with the second feed inlet; the first air outlet may be connected to the third feed inlet.
In the utility model, the drying system can also comprise a cyclone separator and a dust remover, the first air outlet can be connected with the second feeding hole, and the second air outlet can be connected with the third feeding hole.
Wherein the cyclone separator may be of a shape and size conventional in the art.
Wherein the diameter of the second discharging hole can be 320mm.
Wherein the maximum inside diameter above the cyclone separator may be 3000mm.
Wherein the height of the cyclone separator may be 6700mm.
Wherein, can be equipped with the draught fan on the connecting line of the front end of third feed inlet.
The utility model has the positive progress effects that:
(1) In the utility model, the spray drying and the crushing cooperate, and the functions of spray drying and crushing are simultaneously exerted, so that not only is the particle size of the material reduced, but also the independent air flow crushing procedure is omitted, and the working efficiency is improved;
(2) In the utility model, the powder is crushed again in the discharge hole crushing unit, hollow large particles formed by agglomeration are crushed to form solid small particles, and the share of the smaller particle size material in the whole distribution is improved, so that the powder material with uniform particle size is obtained.
Drawings
FIG. 1 is a schematic diagram of a spray drying tower in example 1;
FIG. 2 is a schematic diagram of the drying system in example 1;
FIG. 3 is a scanning electron microscope image of an effect embodiment; the left image is a scanning electron microscope image of lithium iron phosphate in comparative example 1, and the right image is a scanning electron microscope image of lithium iron phosphate in example 3;
FIG. 4 is a graph showing the particle diameter distribution of comparative example 1 in the effect example;
FIG. 5 is a graph showing the particle size distribution of the effect example with respect to example 3;
The reference numerals in the figures indicate: air filter 1, blower 2, heater 3, slurry filter 4, material pump 5, spray drying tower 6, drying chamber 61, discharge section 62, feed cylinder 63, crushing blade 64, stirring shaft 65, atomizer 7, cyclone 8, induced draft fan 9, dust remover 10.
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
Example 1
A spray drying tower, as in fig. 1, comprising a drying tower body and a crushing device; the crushing device is arranged in the drying tower body; the drying tower body comprises a drying chamber 61, a discharging section 62 and a charging barrel 63 which are connected in sequence; the drying chamber 61 and the charging barrel 63 are both in a cylindrical structure, and the discharging section 62 is in a structure with a wide upper part and a narrow lower part; a first discharge hole is arranged below the charging barrel 63; a first air outlet is formed at the side of the discharging section 62; the crushing device comprises a stirring shaft 65 and crushing blades 64 connected with the stirring shaft 65, wherein the crushing blades 64 are arranged at the discharging section 62.
In this embodiment, the discharging section 62 has a truncated cone structure with a reduced diameter.
In this embodiment, the crushing blade 64 is in the form of a blade of three blades. Optionally, more blades may be used.
In this embodiment, the ratio of the diameter of the cylinder 63 to the inner diameter of the drying chamber 61 is 9:100, and any value between (1-2): 20 may be selected as appropriate.
In this embodiment, the ratio of the height of the drying chamber 61 to the height of the discharge section 62 is 1:1.
In this embodiment, the crushing blade 64 is made of stainless steel, such as stainless steel 304.
In this embodiment, the ratio of the diameter of the crushing blade 64 to the diameter of the drying chamber 61 is 0.034:1, and any value between (0.03-0.04): 1 may be selected as appropriate.
In this embodiment, the ratio of the diameter of the crushing blade 64 to the diameter of the barrel 63 may be 0.375:1, or any value between (0.3-0.4): 1 may be selected as appropriate.
In this embodiment, the ratio of the diameter of the crushing blade 64 to the cross-sectional diameter of the discharge section 62 where the bottom end surface of the stirring shaft 65 is located is 0.3:1, and any value between (0.25-0.35): 1 may be selected as appropriate.
In this embodiment, the ratio of the distance from the bottom end of the stirring shaft 65 to the bottom end of the discharge section 62 to the height of the discharge section 62 is 0.02:1, and any value between (0.02-0.03): 1 can be selected as appropriate.
Example 2
A drying system, as in fig. 2, comprising a spray drying tower 6 as in example 1. The cyclone separator 8 is provided with a second feed inlet, a second discharge outlet and a second air outlet. The dust remover 10 is provided with a third feed inlet and a third air outlet. The first air outlet is connected with the second feeding port, and the second air outlet is connected with the third feeding port.
In this embodiment, a draught fan 9 is disposed on the connecting pipe at the front end of the third feeding port.
Example 3
A drying system, referring to fig. 2, includes a spray drying tower 6. Referring to fig. 1, the spray drying tower includes a drying tower body and a crushing device; the crushing device is arranged in the drying tower body; the drying tower body comprises a drying chamber 61, a discharging section 62 and a charging barrel 63 which are connected in sequence; the drying chamber 61 and the charging barrel 63 are both in a cylindrical structure, and the discharging section 62 is in a truncated cone structure with a wide upper part and a narrow lower part and a reduced diameter; a first discharge hole is arranged below the charging barrel 63; a first air outlet is formed at the side of the discharging section 62; the crushing device comprises a stirring shaft 65 and crushing blades 64 connected with the stirring shaft 65, wherein the crushing blades 64 are arranged at the discharging section 62.
An atomizer 7 can be fixedly arranged above the drying chamber 61; one end of the atomizer 7 can be connected with a feeding pipeline and an air inlet pipeline respectively; the air inlet pipeline is provided with a heater 3; the other end of the atomizer 7 may be provided with a nozzle towards the drying chamber 61. The feeding pipe is provided with a slurry filter 4 and a material pump 5. An air filter 1 and a blower 2 are also arranged in the air inlet pipeline.
The diameter of the cartridge 63 is 450mm. The inner diameter of the drying chamber 61 is 5000mm. The height of the drying chamber 61 was 5000mm. The height of the outfeed section 62 is 5000mm. The crushing blade is made of stainless steel 304. The crushing blade is in the shape of a blade consisting of three blades. The diameter of the crushing blade is about 169mm. The distance from the bottom end of the stirring shaft 65 to the bottom end of the discharge section 62 was 100mm. The cross-sectional diameter of the discharge section 62 where the bottom end surface of the stirring shaft 65 is located is about 562mm.
The drying system further comprises a cyclone separator 8, and a second feed inlet, a second discharge outlet and a second air outlet are formed in the cyclone separator 8. The dust remover 10 is provided with a third feed inlet and a third air outlet. The first air outlet is connected with the second feeding port, and the second air outlet is connected with the third feeding port. And a draught fan 9 is arranged on the connecting pipeline at the front end of the third feeding port. The diameter of the second discharging hole is 320mm. The inner diameter above the cyclone 8 was 3000mm. The height of the cyclone 8 was 6700mm.
Comparative example 1
The difference from example 3 is that in this comparative example, the spray drying tower does not include a crushing device.
Effect examples
After the drying systems of example 3 and comparative example 1 were run for a period of time, the lithium iron phosphate material in the first discharge port was collected, and subjected to scanning electron microscopy as shown in fig. 3, and particle size distribution analysis as shown in fig. 4 to 5.
The left-hand graph of fig. 3 and fig. 4 show that the average particle diameter of lithium iron phosphate in comparative example 1 is about 50 to 60 μm, and only few particles having a particle diameter of less than 5 μm are present. The right-hand side of FIG. 3 and FIG. 5 show that the average particle size of lithium iron phosphate in example 3 is about 1-2. Mu.m, and almost all particles have a particle size of less than 5. Mu.m.
Claims (10)
1. A spray drying tower, which is characterized by comprising a drying tower body and a crushing device; the crushing device is arranged in the drying tower body;
The drying tower body comprises a drying chamber (61), a discharging section (62) and a charging barrel (63) which are connected in sequence; the drying chamber (61) and the charging barrel (63) are of cylindrical structures, and the discharging section (62) is of a structure with a wide upper part and a narrow lower part; a first discharge hole is formed below the charging barrel (63); a first air outlet is formed in the lateral side of the discharging section (62);
The crushing device comprises a stirring shaft (65) and crushing blades (64) connected with the stirring shaft (65), and the crushing blades (64) are arranged at the discharging section (62); the ratio of the distance from the bottom end of the stirring shaft (65) to the bottom end of the discharging section (62) to the height of the discharging section (62) is (0.02-0.03): 1; the ratio of the diameter of the crushing blade (64) to the cross-sectional diameter of the discharge section (62) where the bottom end surface of the stirring shaft (65) is located is (0.25-0.35): 1.
2. Spray drying tower according to claim 1, characterized in that an atomizer (7) is fixed above the drying chamber (61); one end of the atomizer (7) is connected with the feeding pipeline and the air inlet pipeline respectively; a heater (3) is arranged on the air inlet pipeline; the other end of the atomizer (7) is provided with a nozzle facing the drying chamber (61).
3. Spray drying tower according to claim 2, characterized in that a slurry filter (4) or a feed pump (5) is provided on the feed line.
4. Spray drying tower according to claim 2, characterized in that the air inlet line is further provided with an air filter (1) or a blower (2).
5. Spray drying tower according to claim 1, wherein the discharge section (62) has a truncated cone structure of reduced diameter.
6. The spray drying tower according to claim 1, wherein the crushing blade (64) comprises 3-4 blades.
7. Spray drying tower according to claim 1, characterized in that the ratio of the diameter of the crushing blades (64) to the diameter of the drying chamber (61) is (0.03-0.04): 1;
the ratio of the diameter of the crushing blade (64) to the diameter of the cylinder (63) is (0.3-0.4): 1.
8. A drying system, characterized in that it comprises a spray drying tower according to any one of claims 1-7.
9. The drying system according to claim 8, further comprising a cyclone separator (8), the cyclone separator (8) being provided with a second feed inlet, a second discharge outlet and a second air outlet; the first air outlet is connected with the second feeding port;
The drying system further comprises a dust remover (10), and the dust remover (10) is provided with a third feed inlet and a third air outlet; the second air outlet is connected with the third feed inlet.
10. Drying system according to claim 9, wherein the connection line at the front end of the third feed inlet is provided with an induced draft fan (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323205775.6U CN221385224U (en) | 2023-11-27 | 2023-11-27 | Spray drying tower and drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323205775.6U CN221385224U (en) | 2023-11-27 | 2023-11-27 | Spray drying tower and drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221385224U true CN221385224U (en) | 2024-07-23 |
Family
ID=91943291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323205775.6U Active CN221385224U (en) | 2023-11-27 | 2023-11-27 | Spray drying tower and drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221385224U (en) |
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2023
- 2023-11-27 CN CN202323205775.6U patent/CN221385224U/en active Active
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