CN211953641U - Flash drying and preheating device for hydrotalcite - Google Patents
Flash drying and preheating device for hydrotalcite Download PDFInfo
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- CN211953641U CN211953641U CN202020130962.XU CN202020130962U CN211953641U CN 211953641 U CN211953641 U CN 211953641U CN 202020130962 U CN202020130962 U CN 202020130962U CN 211953641 U CN211953641 U CN 211953641U
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Abstract
The utility model provides a flash drying and preheating device for hydrotalcite, which comprises a preheating dryer, a bag-type dust collector, a flash dryer and a cyclone separator; an upper discharge port of the preheating dryer is connected with the bag-type dust collector, and a lower discharge port of the preheating dryer and a discharge port of the bag-type dust collector are connected with the flash dryer; the discharge port of the flash dryer is connected with the cyclone separator, and the air outlet of the cyclone separator is connected with the air inlet of the preheating dryer; the discharge port of the cyclone separator is connected with a finished product sieving machine. The utility model provides a drying and preheating device, material moisture is easily controlled, and the granule is loose, and the product granularity is better, owing to adopt hot-blast and wet material direct contact, heat exchange efficiency is high, because of material humidity is very big, the fine particle that hot-blast carried is by the entrapment, and the material that the air-out carried is less, and the temperature is lower, evacuation after the sack removes dust.
Description
Technical Field
The utility model belongs to the technical field of the hydrotalcite is dry, a flash drying and preheating device for hydrotalcite is related to.
Background
The production of hydrotalcite is usually carried out in a dilute solution, the slurry after reaction has fine particles and large water content, and the sample is pasty. Although the hydrotalcite before drying is subjected to plate-and-frame filter pressing or centrifugal separation, the water content is still high generally, and the hydrotalcite wet material has fine particles and high viscosity, so that the water content separation and drying are difficult. The traditional process is used for drying materials, a method of combining paddle drying and flash drying or only adopting flash drying is adopted, the paddle drying adopts primary steam heating, the moisture of the materials is difficult to control, the materials are easy to overheat, the materials are easy to agglomerate, and the particle size distribution of a hydrotalcite product is influenced; in order to prevent the materials from caking, wet materials are directly fed into a flash evaporation dryer in some processes, although the particle size of hydrotalcite is good, the method usually has excessive moisture, needs repeated returning and drying for a plurality of times, wastes energy, affects yield, is difficult to ensure moisture, has large fluctuation of the moisture content of products, sometimes has difficulty in reaching lower level of the moisture of the materials after repeated returning, and has low primary qualification rate of the moisture of the products.
The traditional process adopts intermittent operation, has low control precision, wide range and large fluctuation of product moisture, and causes unstable quality. And the hot air after flash evaporation drying and cyclone separation is directly discharged after bag-type dust removal, thereby causing energy waste.
SUMMERY OF THE UTILITY MODEL
For solving the problem, the utility model discloses reform transform traditional technology, utilize the cylinder preheating desicator of design by oneself to replace traditional paddle desicator, utilize the secondary after the flash separation hot-blast, carry out direct convection heat transfer with initial wet material, utilize "T" shape scraper blade in the cylinder preheating desicator, take the wet material to the upper portion of cask, raise and spill in the desicator, with follow the entrance point along the hot-blast following direct contact heat transfer of secondary that the tangential was sent into. T-shaped scrapers in the drum-type preheating dryer are arranged in layers, and the layers are sequentially and crosswise arranged from front to back along the axial direction of a rotating shaft. Wet materials are spread in a drying barrel by a rotating spirally arranged T-shaped scraper, are heated and driven by secondary hot air rotating in the same direction, and are conveyed to a discharge port to be discharged and conveyed into a flash evaporation drying feeding bin; the secondary hot air is cooled by the wet material and then discharged from an air outlet at the upper part of the discharge end, enters a bag-type dust collector and then is emptied.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a flash evaporation drying and preheating device for hydrotalcite is characterized by comprising a preheating dryer, a bag-type dust collector, a flash evaporation dryer and a cyclone separator;
an upper discharge port of the preheating dryer is connected with the bag-type dust collector, and a lower discharge port of the preheating dryer and a discharge port of the bag-type dust collector are connected with the flash dryer; the discharge port of the flash dryer is connected with the cyclone separator, and the air outlet of the cyclone separator is connected with the air inlet of the preheating dryer; the discharge port of the cyclone separator is connected with a finished product sieving machine.
Preferably, the drying preheater adopts a cylindrical rotating shaft structure, and a plurality of T-shaped scraping plates are axially arranged on the rotating shaft; each layer of scraper is provided with four T-shaped scrapers which are arranged in a cross shape; the layers are arranged in sequence from front to back in a crossed manner along the axial direction of the rotating shaft.
Preferably, the adjacent layers form an included angle of 45 degrees. The interlayer spacing between every two layers of scrapers is 400-600 mm.
Preferably, the drying preheater is horizontal.
Preferably, the feed inlet of the preheating dryer is connected with the wet material bin through a first blanking auger.
Preferably, the lower discharge port of the preheating dryer and the discharge port of the bag-type dust collector are connected with a belt, the belt is connected with a belt conveyor, the belt conveyor is connected with an inlet bin of the cyclone dryer, and the lower port of the inlet bin is connected with the feed inlet of the flash dryer through a second lower packing auger.
Preferably, the air inlet of the flash dryer is connected with primary hot air, and the air inlet is positioned at the lower end of the flash dryer and enters along a tangent line.
Preferably, the discharge port of the cyclone separator after flash drying is connected with a finished product bin through a pipeline, and the discharge port of the finished product bin is connected with a finished product screening machine through a pipeline through a third blanking auger driven by a motor.
Particularly, in order to control the temperature of the steam at the inlet of the preheating dryer to be constant in a certain range, a primary steam pipeline can be connected to the steam pipeline at the inlet of the preheating dryer and used for adjusting the air inlet temperature, and the inlet steam is controlled to be in a specified temperature range through a valve.
The embodiment of the utility model provides an embodiment one or more technical scheme has following technological effect at least:
the utility model provides a drying and preheating device, material moisture content is easy to control, and the granule is loose, and the product granularity is better, and the one-time qualification rate of product moisture content and granularity is higher. Because the hot air is directly contacted with the wet material, the heat exchange efficiency is high, fine particles carried by the hot air are collected due to high material humidity, the material carried by the outlet air is less, the temperature is lower, and the air is emptied after the bag-type dust removal.
Drawings
Fig. 1 is a flash drying and preheating device for hydrotalcite according to the embodiment of the present invention.
Reference numerals:
1-slurry tank; 2-slurry pump; 3-a centrifuge; 4-a storage bin; 5-a first discharging auger; 6-a first motor; 7-preheating a dryer; 8-a scraper; 9-bag dust collector; 10-an exhaust fan; 11-a belt conveyor; 12-an inlet bunker; 13-a second blanking auger; 14-a second electric machine; 15-flash dryer; 16-a cyclone separator; 17-finished product bin; 18-a third blanking auger; 19-finished product sieving machine.
Detailed Description
As shown in fig. 1, in order to realize the flash evaporation drying and preheating device for hydrotalcite of the embodiment of the present invention, a pipeline of washed hydrotalcite slurry is connected to a hydrotalcite slurry tank 1, an outlet of the slurry tank 1 is connected to an inlet of a slurry pump 2 through a pipeline, an inlet of the slurry pump 2 is connected to an inlet of a centrifuge 3 through a pipeline, an outlet of the centrifuge 3 is connected to an inlet of a hydrotalcite wet material bin 4, and a lower portion of the bin 4 is connected to a first discharging auger 5; the feed opening of the first feeding auger 5 is connected with the feed opening of the cylinder type preheating dryer 7 through a pipeline, a material outlet pipeline is connected with a feed pipeline of the bag-type dust remover 9, and then the feed pipeline is connected with a belt conveyor through a pipeline; an air inlet of the cylindrical preheating dryer 7 is connected with an air outlet of the cyclone separator 16 through a pipeline, an air outlet of the cylindrical preheating dryer is connected with an air inlet of the bag-type dust collector 9 through a pipeline, a feed opening of the bag-type dust collector 9 is connected with a discharge opening pipeline of the cylindrical preheating dryer 7 through a pipeline, and an air outlet of the bag-type dust collector 9 is connected with an inlet of the exhaust fan 10 through a pipeline; a discharge port pipeline of the drum-type preheating dryer 7 is connected with a belt conveyor 11, the belt conveyor 11 is connected with an inlet bin 12 of a cyclone dryer, a discharge port of the inlet bin 12 is connected with a feed port of a flash dryer 15 through a second discharge auger 13, and an air inlet of the flash dryer 15 is connected with primary hot air; the outlet of the flash dryer 15 is connected with a cyclone separator 16, the discharge port of the cyclone separator 16 is connected with a finished product bin 17 through a pipeline, and the air outlet of the cyclone separator 16 is connected with the air inlet of the drum-type preheating dryer 7 through a pipeline; a discharge port of the finished product bin 17 is connected with a finished product screening machine 19 through a third blanking auger 18 driven by a motor through a pipeline, the screened materials are packaged, and coarse materials are returned to the system. The second motor 14 rotates the agitator, breaking up the material. The stirrer is used for mechanical crushing, and the materials are micronized under the actions of centrifugation, shearing and collision.
The working process of the device is as follows:
the method comprises the following steps that hydrotalcite slurry subjected to crystal form reforming or modification enters a hydrotalcite slurry tank 1, the hydrotalcite slurry enters a solid-liquid separator, namely a centrifugal machine 3, a slurry pump 2 is used for pumping the hydrotalcite slurry into a solid-liquid separator, namely a centrifugal machine 3, separated liquid-phase water is recycled as primary washing water, wet solid-phase hydrotalcite enters a wet material bin 4 and is conveyed to a drying preheater 7 through a first discharging auger 5 at the bottom of the wet material bin 4, the drying preheater 7 is of a cylindrical rotating shaft structure, a plurality of layers of scraping plates are arranged on the rotating shaft, each layer of scraping plate comprises four T-shaped scraping plates 8, the four T-shaped scraping plates 8 are arranged in a cross shape, each T-shaped scraping plate 8 comprises a transverse plate and a vertical plate, the transverse plates are vertically connected with the vertical plates. The multilayer scraping plates are sequentially arranged in a cross mode from front to back along the axial direction of the rotating shaft, and the transverse plates of two adjacent layers of scraping plates form an included angle of 45 degrees. The rotating shaft is driven to rotate by a first motor 6; the secondary hot air enters from one end along the tangential direction and the wet material. Along with the pivot is rotatory, the material is raised and the hot-blast direct contact heat transfer of secondary, and the material is heated gradually, and gas is discharged from the upper portion exit end, and the hot-blast wet material cooling of secondary gets into sack cleaner 9 and removes dust the back, is taken out by air exhauster 10, discharges, and entire system is the negative pressure operation. And (3) after controlling the moisture content of the material out of the drying preheater to be 15-35%, conveying the material into a flash dryer feeding bin 12 through a belt on a belt conveyor 11. And then the hot air entering from the bottom of the flash dryer 15 and the preheated material sent by the feeder are subjected to heat convection, shearing and crushing, rotating and rising, and are gradually dried, the material with high water content and high particle weight is separated by a baffle, the dried light material is discharged from the upper part of the flash dryer 15 along with the hot air and enters a cyclone separator 16, the material after cyclone separation enters a finished product bin 17, after the finished product bin 17 is cooled, the material is sent to a screening machine 19 by a third discharging auger 18 at the bottom of the finished product bin 17, and the screened product enters a packaging system. The secondary hot air from the cyclone 16 enters the drying preheater 7 for preheating the material.
The secondary hot air after centrifugal separation of the flash evaporation dryer is discharged, the temperature is 80-140 ℃, when the flash evaporation dryer is used for drying and preheating, the moisture of the material is easy to control, the particles are loose, the granularity of the product is better, the hot air is directly contacted with the wet material, the heat exchange efficiency is high, fine particles carried by the hot air are collected due to the fact that the humidity of the material is very high, the material carried by the discharged air is less, the temperature is lower, and the secondary hot air is discharged after being subjected to bag-type dust removal.
After the hydrotalcite is heated by primary steam before improvement, the water content is 4-27%, and the hydrotalcite is hard and not easy to break due to blocky materials and has uneven granularity and wider granularity distribution. Wet materials directly enter a flash evaporation dryer, and because the moisture of the wet materials is 47-78%, the fluctuation is large, the moisture is high, the operation difficulty is large, the moisture of the dried materials is high and generally is more than 0.4%, the materials are repeatedly thrown back and dried, the moisture is still high, the moisture is less than 0.3%, and the moisture is less than 0.2% and is not easy to obtain. The moisture of the material discharged from the drying preheater after the improvement is 15-30%; the moisture qualification rate of the final product after drying is improved from 60% to more than 90%, the qualification rate of low-moisture products is greatly improved, and the product with the moisture content less than or equal to 0.3% after primary drying reaches more than 80%; the product has more uniform granularity, narrower distribution and better product quality.
Claims (7)
1. A flash evaporation drying and preheating device for hydrotalcite is characterized by comprising a preheating dryer (7), a bag-type dust collector (9), a flash evaporation dryer (15) and a cyclone separator (16);
an upper air outlet of the preheating dryer (7) is connected with a bag-type dust collector (9), and a lower discharge port of the preheating dryer (7) and a discharge port of the bag-type dust collector (9) are connected with a flash dryer (15); a discharge port of the flash dryer (15) is connected with a cyclone separator (16), and an air outlet of the cyclone separator (16) is connected with an air inlet of the preheating dryer; the discharge hole of the cyclone separator (16) is connected with a finished product sieving machine (19).
2. The flash drying and preheating device for hydrotalcite according to claim 1, characterized in that the preheating dryer (7) is of a cylindrical spindle structure, and several "T" shaped scrapers are welded on the spindle.
3. The flash drying and preheating device for hydrotalcite according to claim 2, characterized in that the preheating dryer (7) is horizontal.
4. The flash drying and preheating device for hydrotalcite according to claim 1 or 2, characterized in that the inlet of the preheating dryer (7) is connected to the wet silo by a first feeding auger.
5. The flash drying and preheating device for hydrotalcite according to claim 1, wherein the lower discharge port of the preheating dryer (7) and the discharge port of the bag-type dust remover (9) are connected with a belt conveyor (11), the belt conveyor (11) is connected with an inlet bin (12) of a cyclone dryer, and the lower discharge port of the inlet bin (12) is connected with the feed port of the flash dryer (15) through a second discharge auger (13).
6. The flash drying and preheating device for hydrotalcite according to claim 1, wherein the inlet of the flash dryer (15) is connected with primary hot air, and the inlet is located at the lower end of the flash dryer.
7. The flash drying and preheating device for hydrotalcite according to claim 1, wherein the discharge port of the cyclone separator (16) is connected to the finished product bin (17) through a pipeline, and the discharge port of the finished product bin (17) is connected to the finished product screening machine (19) through a pipeline by a third feeding auger (18) driven by a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020130962.XU CN211953641U (en) | 2020-01-20 | 2020-01-20 | Flash drying and preheating device for hydrotalcite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020130962.XU CN211953641U (en) | 2020-01-20 | 2020-01-20 | Flash drying and preheating device for hydrotalcite |
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| CN211953641U true CN211953641U (en) | 2020-11-17 |
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| CN202020130962.XU Active CN211953641U (en) | 2020-01-20 | 2020-01-20 | Flash drying and preheating device for hydrotalcite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060067A (en) * | 2021-10-19 | 2022-09-16 | 天华化工机械及自动化研究设计院有限公司 | Polyester new material granule drying system |
| CN115400857A (en) * | 2021-05-28 | 2022-11-29 | 湖州新开元碎石有限公司 | Adjusting device for controlling content of machine-made sand powder |
-
2020
- 2020-01-20 CN CN202020130962.XU patent/CN211953641U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400857A (en) * | 2021-05-28 | 2022-11-29 | 湖州新开元碎石有限公司 | Adjusting device for controlling content of machine-made sand powder |
| CN115060067A (en) * | 2021-10-19 | 2022-09-16 | 天华化工机械及自动化研究设计院有限公司 | Polyester new material granule drying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A flash drying and preheating device for hydrotalcite Effective date of registration: 20210617 Granted publication date: 20201117 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2021980004882 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220617 Granted publication date: 20201117 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2021980004882 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A flash drying and preheating device for hydrotalcite Effective date of registration: 20220622 Granted publication date: 20201117 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2022980008536 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230615 Granted publication date: 20201117 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2022980008536 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A flash drying and preheating device for hydrotalcite Effective date of registration: 20230621 Granted publication date: 20201117 Pledgee: Bank of Tai'an Limited by Share Ltd. Pledgor: TAIAN BOYANG CHEMICAL TECHNOLOGY Co.,Ltd. Registration number: Y2023980044856 |