CN1023974C - Spray-drying granulation apparatus - Google Patents
Spray-drying granulation apparatus Download PDFInfo
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- CN1023974C CN1023974C CN 88102319 CN88102319A CN1023974C CN 1023974 C CN1023974 C CN 1023974C CN 88102319 CN88102319 CN 88102319 CN 88102319 A CN88102319 A CN 88102319A CN 1023974 C CN1023974 C CN 1023974C
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- 238000001694 spray drying Methods 0.000 title claims abstract description 60
- 238000005469 granulation Methods 0.000 title claims description 85
- 230000003179 granulation Effects 0.000 title claims description 85
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000011230 binding agent Substances 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 29
- 239000008187 granular material Substances 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 235000015111 chews Nutrition 0.000 claims 2
- 238000000889 atomisation Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 38
- 239000000853 adhesive Substances 0.000 abstract description 18
- 230000001070 adhesive effect Effects 0.000 abstract description 18
- 238000001035 drying Methods 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 31
- 239000000463 material Substances 0.000 description 27
- 238000011084 recovery Methods 0.000 description 14
- 238000001816 cooling Methods 0.000 description 12
- 239000010419 fine particle Substances 0.000 description 12
- 239000002912 waste gas Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 150000001413 amino acids Chemical class 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 230000008676 import Effects 0.000 description 6
- 235000013336 milk Nutrition 0.000 description 6
- 239000008267 milk Substances 0.000 description 6
- 210000004080 milk Anatomy 0.000 description 6
- 238000005453 pelletization Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000005354 coacervation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000013555 soy sauce Nutrition 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
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- 239000008361 herbal raw material Substances 0.000 description 1
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- 239000008188 pellet Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to a spray-drying granulating device which is provided with a spray-drying region on the upper part of a container and a powder granulating region on the lower part of the container, wherein the spray-drying region dries ejected nepheloid feeding liquid into powder; the powder granulating region is provided with a nozzle for feeding adhesive liquid. Powder conveyed to the lower region does not need to be kept in a sticky state or completely dried state; ejected fog can be dried into powder with wide drying degrees before being granulated in the granulating region of the adhesive liquid. The granulating degrees can be selected according to requirements, and simultaneously, the phenomenon that the powder is attached to the inner side wall of the container because the powder is not completely dried is avoided.
Description
The present invention relates to a kind of mainly by a spray drying granulator equipment that container is formed that contains the district that granulates.
In general, the powder that obtains by spray-drying is very thin, and its particle mean size is approximately tens to a hundreds of micron (for example 30 to 120 microns).If this powder is directly produced, when soluble in water, it will be as dust adrift or become undissolved bulk, and have lower flowability.In order to overcome these shortcomings, be to make powders granulate (wanting big 3 to 6 times before granulating in that the later average particle size of granulating is general) for the preparation method of this powder in many cases with adopting the resulting fine powder of spray drying process following a kind of pelletization.
The granule size of particle is to change according to the purposes of grain products.For example, milk powder is that the employing granularity is 400 to 800 microns a fine grained for example, and the granularity of the particle of the herbal raw material that the manufacturing tablet is used is 150 to 400 microns, and the granularity of the needed particle of antibiotic is 80 to 200 microns.
Granulation for powder, be known that a kind of equipment of making particle continuously, in this equipment, a kind of binder liq is injected on the powder that is suspended in a kind of fluid (mainly being air) that upwards flows, and just forms particle continuously by the cohesion of this adhesive.In order to form particle, this method has used because the coacervation that humidity produced of powder.It is generally acknowledged under the situation that powder is granulated, water content in the powder is in 5 to 15% scopes, allow in the scope of a broad, to change such as the water content of milk powder in its powder, and in containing amino acid whose material in the solution such as soy sauce or various extracts, wherein the content of water allows in 5 to 8% scopes.But in a kind of physical device, if the humidity of powder (water content) is low, then the process of Zhi Liing is just slow, if when water content is high, perhaps attached on the equipment or can form the bulk of dumplings shape.Like this, its suitable water content scope is very narrow.For example, be less than 1% for percentage is several for containing amino acid whose material for its scope of milk powder.Therefore, the control technology that improves water content widely is very important.
A spray drying device and a fluidized granulation equipment combine and can be used as a construction system being made particle by liquid charging stock.Below the equipment of two kinds of patterns on this design basis, put forward, although also there is some problem in they.
Fig. 5 shows a spray drying device, and this equipment mainly is to be made of a container of being furnished with the fluid bed part.In Fig. 5, demonstrate 101, one fluidized granulation districts 102,100, one spray-drying districts of a nozzle, oven dry hot-air inlets 103,104, one first separators 105 of fluidized bed air Lead-In Area, 106, one product letdown tanks 107 of one second separator and a feed liquid 108.In this well-known equipment, the nozzle 100 that spray-drying is used also uses as the binder liq injection nozzle that fluidized granulation is used, and when so then carrying out spray-drying, the water content of the material of having dried just can not descend rightly.This is that pelletization just can not effectively be carried out because when the content of water in the material is lower than certain level.
Reason for this reason, the selection of various factors, comprise the relation between the position arrangement in spray-drying district 101 and fluidized granulation district 102, the spray angle of nozzle, the viscosity of the liquid that sprays and density, the diameter of fluid drips, relation between the flow velocity of temperature and hot-air and fluidization air or the like are very complicated, and suitable adjusting range is very narrow.
Spray-dried various drying materials all are to be in non-bone dry state, and are tending towards on the inwall attached to container.Thereby along with the amount of the material that adheres to constantly increases, these materials that adhere to have thermal denaturation takes place may or exist the possibility that makes pelletization not carry out.
The degree of granulating is decided by the condition of drying fully, and the size that wants to change as requested particle is impossible.
A kind of equipment as shown in Figure 6 has a spray-drying district X, and powder collection district Y and one are provided with adhesive and send the fluidized granulation district F of nozzle 201 to and also come into operation in discrete container.But this equipment needs a high cost of equipment and a high operating cost.The outlet of the label 0 expression product among Fig. 6.
In the spray-drying district, for being transported in the following district, particulate is necessary particulate is suitably dried, and in general, the product needed of discharge reduces temperature or humidity.Therefore, just require auxiliary air Z is sent in the container, and will provide a jumbo optional equipment of an air blast and a wet scrubber that comprises as the equipment for after-treatment that auxiliary air is provided.
Bag type filtering device F of this fluidized granulation district configuration, thereby be difficult to washing.
Fig. 7 shows another equipment, this equipment is by spraying base feed powder constantly, in a stirred vessel 300, spray into a kind of binder liq by stirring vane 301, the powder that will have binder liq stirs, so that form the circular flow (consult " reality of up-to-date granulation skill book) of an eddy current shape " (Sogo technical data collection), manage the development centre by the Jinchuan County and publish, 1984, pp36-39) so that form particle continuously.This equipment also is to be the formation particle, and the coacervation that is applied in the humidity generation in the powder is the basic method of setting up.Content range that it is generally acknowledged water in the powder pelletization as mentioned above is 5 to 15%, allow in the scope of broad, to change such as the water content in the milk powder, and in containing amino acid whose material as the solution of soy sauce or various extracts, only allowing water content is 5 to 8%.But, in a physical device, if reducing, the humidity in the powder (water content) granulates that carry out will be slack-off, can make powder attached on the equipment or become the bulk of dumplings shape if humidity is too high.Like this, suitable water content scope is very narrow.For example, have only the scope of a few percent for milk powder, and be less than 1% for containing amino acid whose material.Therefore, improving the technology of controlling water content greatly is very important.
Fig. 8 shows that one is called and holds this ad hoc be equipped with (Wurster Apparatus), and this equipment is called a kind of equipment of the spouted bed pellet fabrication device with drainage tube, and (consulting " the 3rd time saw lumber and seed designs paper lecture fine piece of writing collection " can be published by the seed designs portion of association of powder section; Nov.27,28,1986, pp71-74).Hold this ad hoc being equipped with in (Wurster Appartus) this, particulate is to suck by the air-flow that makes progress that forms in a drainage tube 400, the binder liq injection stream that is provided by nozzle 401 simultaneously upwards blows out, stall descends then, and begin in the district 402 of a diffusion to fall (or continuing to flow), so circulate.The air institute fluidisation that particulate bottom accumulating in is all provided by the plate 403 with many apertures, and sucked continuously in the drainage tube 400.
If powder is to produce by discrete equipment, and this powder is again to handle by this facility for granulating with the particulate of the particle size distribution of broad, just might there be fractional condensation than small particle, will be on sidewall surfaces or attached to a bag filter 404 that is positioned at upper zone by electrostatic adherence, perhaps depart to circulate flying in the bag filter 404, this phenomenon has reduced the uniformity of granulating.
Therefore a general purpose of the present invention provides a kind of spray drying granulator equipment that the problems referred to above that routine techniques produces do not occur adopting.
Thereby an object of the present invention is to provide a kind of spray drying granulator equipment, this equipment is wanted and can be set condition of work in the scope of a broad according to all kinds raw material.
Another object of the present invention provides a kind of spray drying granulator equipment, and this equipment wants to prevent that material with drying is attached on its madial wall.
For this purpose, the invention provides a kind of facility for granulating that has spray-drying district and the district that granulates, and the spray-drying district and the district that granulates form in a container, this granulation district has a granulation binders liquid supply nozzle and/or an agitating device, this agitating device be be arranged on the spray-drying district in feed liquid supply with atomizer and separate setting.
The processing procedure of being finished by this granulation district is a fluidized granulation, stirs and granulates or the spouted bed granulation.
Therefore, generally be divided into three kinds of patterns according to equipment of the present invention.
Under the fluidized granulation situation, a spray-drying district and a fluidized granulation district form in a container, and nozzle that is used to supply with fluidisation granulation binders liquid is arranged in the fluidized granulation district and be arranged on feed liquid in the spray-drying district and supply with atomizer and be provided with respectively.
Stirring under the situation of granulating, a spray-drying district and a stirring are granulated, and the district is whole in a container to be constituted, and is provided with an agitating device in this stirring granulation district.
In most cases, preferably one of configuration is used to supply with the nozzle that stirs granulation binders liquid in stirring the district that granulates, and this nozzle be be located at the spray-drying district in feed liquid supply with atomizer and separate setting, but the facility of this adhesive supply nozzle is not always to need.
Under spouted bed granulation situation, a spray-drying district and a spouted bed are granulated to distinguish and are formed in a container, nozzle that is used to supply with spouted bed granulation binders liquid is arranged on spouted bed and granulates in the district, this nozzle be be located at the spray-drying district in feed liquid supply with atomizer and separate the top that drainage tube that setting and one requires to arrange according to size is arranged on the adhesive supply nozzle.
The dry powder that each of these equipment of the present invention can both guarantee to be formed by feed liquid is all at spray-drying district inner drying, so that make its water content in a very wide excursion (seeing the A among Fig. 9) as between an incomplete drying regime (seeing the B among Fig. 9) and a bone dry state (seeing the C among Fig. 9), changing, and in the district that granulates, the material of drying also thinks that the humidity supply that is suitable for granulating required is with a kind of adhesive.Therefore just might prevent that the material of having dried is attached on the madial wall in spray-drying district and might adjust condition of work in the scope of a broad according to various types of raw material condition.
Except that water that is used for spray drying treatment or feed liquid (shared), starch, dextrin, hydroxypropyl cellulose (HPC), carboxymethyl cellulose (CMC), methylcellulose (MC) or similar substance can be used as granulation binders of the present invention.Specifically, this feed liquid is preferably by milk powder or to contain amino acid whose goods shared, thereby reduces thermal energy consumption.
The degree of granulating can be by adjusting the interpolation speed of adhesive, and the concentration of adhesive and the time cycle length that stops in the district that granulates change.
After reading following detailed, other purpose and advantage will be perfectly clear.
Fig. 1 is the schematic diagram that shows an embodiment of a spray drying granulator equipment of the present invention;
Fig. 2 is the schematic diagram that shows another embodiment of a spray drying granulator equipment of the present invention;
Fig. 3 is the schematic diagram that shows another embodiment of a spray drying granulator equipment of the present invention;
Fig. 4 shows a kind of equipment that has a rotating disc sprayer and a rotating spoon, is used to represent another one embodiment of the present invention;
Fig. 5 is the schematic diagram that shows the common spray dryer of a band fluid bed;
Fig. 6 shows a schematic diagram that has the conventional equipment of discrete granulation device;
Fig. 7 shows a conventional schematic diagram that stirs facility for granulating;
Fig. 8 is the schematic diagram that shows the spouted bed facility for granulating of a routine; With
Fig. 9 is the moisture spirogram that is presented at the powder that obtains in the spray-drying district.
Now be described each most preferred embodiment of the present invention as follows:
A kind of spray drying granulator equipment that has the fluidized granulation district, and in order to show that one embodiment of the invention will at first be described.
Fig. 1 is a main body 1 that shows this equipment, is provided with a spray-drying district 2 on the top of this main body, and is provided with a fluidized granulation district 3 in its underpart.Spray-drying district 2 is made up of a cylindrical shape part 2a and a conical portion 2b.The main body of this equipment disposes: a feed liquid spray nozzle 4, and such as a drive nozzle, second fluid nozzle, or rotating disc sprayer; An adhesive supply nozzle 5 is such as a second fluid nozzle that is used to supply with the granulation binder liq; One is used for spray-dired hot air blowers 6; A fluidized bed air air blast 7; With a hot air outlet 8, the toxic emission in spray-drying district 2 and fluidized granulation district 3 is gone out by this outlet.This hot air outlet 8 is to form in the upper end of the lower end of cylindrical shape part 2a and conical portion 2b, and forms an annular configuration thus.
Being provided with one first separator 9 is used for reclaiming thin particulate by waste gas.The fine particles that reclaims by this first separator 9 is back in the fluidized granulation district 3 through recovery particulate import 15.Air exhauster 9a of these first separator, 9 configurations.
Being provided with a device 10 is used for the product of being discharged by fluidized granulation district 3 being dried and cooling off.This oven dry and cooling device can be the fluidized bed dryers of the level of the known pattern of a kind of people.Hot-air 11 and the cold air 12 supplied with below by table top 13 all are blown in the device 10 of oven dry and cooling.
The course of work to this equipment is described below:
In spray-drying district 2, a kind of feed liquid atomizes by this feed liquid supply nozzle 4, and formed thus droplet dries by the hot-air that is blown in this baking zone by hot air blowers 6, so that make it become thin particulate.These fine particles fall through the inside of cylindrical shape part 2a, and are dried simultaneously, arrive conical portion 2b then.This oven dry hot-air is discharged into the outside through hot air outlet 8.This material is dried to as the dried particulate with water content of about 4% and be easy to handle, because the moisture content that does not need to dry material for example remains on about 7%, also will be illustrated below.The aridity that so just might make formed particulate in the fluidized granulation method is than much higher at the hybrid-type method of granulating of the fluid bed of the routine shown in Fig. 5, and on can preventing effectively in the condition of work scope of a broad that the material of having dried is attached to conical portion 2b.
In fluidized granulation district 3, thereby a kind of granulation binders liquid is ejected by adhesive supply nozzle 5 and forms particle.In the case, the speed of the supply that the degree of granulation can be by selecting granulation binders liquid changes.The hot-air of being discharged by fluidized granulation district 3 emits through hot air outlet 8.
Below will be as follows to being described for example of a kind of spray drying granulator equipment that has a district that stir to granulate.
Fig. 2 is the schematic diagram that a spray-drying stirs facility for granulating, in order to show an alternative embodiment of the invention.As shown in Figure 2, this equipment main body 20 has a spray-drying district 21 and is positioned at its top and one and stirs the district 22 that granulates and be positioned at its underpart.This spray-drying district 21 is made up of a cylindrical shape part 21a and a conical portion 21b.This mixing part 22 is jar shapes.The main body of this equipment disposes; A feed liquid spray nozzle 23 is such as a drive nozzle, second fluid nozzle, or rotating disc sprayer; An adhesive supply nozzle 24 is such as a second fluid nozzle that is used to supply with the granulation binder liq; One is used for spray-dired hot air blowers 25; An agitating device 26, this device is made up of a main stirring vane 26a and an auxiliary stirring vane 26b who rotates around trunnion axis who rotates around vertical axis; One is used for the blowing opening 26c that heat is cleaned; With a hot air outlet 27, the toxic emission in spray-drying district 21 and the stirring granulation district 22 is gone out by this outlet.This hot air outlet 27 is to form in the upper end of the lower end of cylindrical portions may 21a and tapered segment 21b, and it has an annular configuration like this.This hot air outlet 27 also can be arranged on the top of cylindrical shape part 21a.
Being provided with one first separator 28 is used for reclaiming thin particulate by waste gas.The fine particles that is reclaimed by separator 28 is back in the stirring granulation district 22 through recovery particulate import 29.This first separator 28 disposes an air exhauster 28a.
Being provided with a device 30 is used for and will is dried by the product that stirs district's 22 discharges of granulating and cool off.This oven dry and cooling device can be the devices of known horizontal fluidised bed dryer of people and so on.Hot-air 32 and the cold air 33 supplied with below by table top 31 all are blown in oven dry and the cooling device 30.
One second separator 34 is used to handle the waste gas by product oven dry and cooling device 30, and is connected together with the waste gas of this separator with by the waste gas stream of first separator, 28 discharges, is disposed to the outside of system thus.The fine particles that reclaims by second separator 34 is back to recovery particulate import 29.
To the course of work of this equipment be described below.
In spray-drying district 21, a kind of feed liquid atomizes by feed liquid supply nozzle 23, and the droplet that forms thus is blown into the hot-air in this district and is dried by hot air blowers 25, and they just become fine particles like this.This fine particles is passed through the inside of cylindrical shape part 21a to the whereabouts, dries simultaneously, arrives conical portion 21b then.The oven dry hot-air is to be discharged into the outside through hot air outlet 27.This material is dried to as the dried particulate with water content about 4%, and is easy to handle, because the moisture content in the material that does not need to dry for example remains on 7%, also will be illustrated below.So just can make the aridity that under the method situation of the particulate aridity that forms under the fluidized granulation situation, forms much higher than routine, and the material that in the condition of work scope of broad, can prevent drying effectively attached to conical portion 21b on.
In stirring the district 22 that granulates, a kind of granulation binders liquid is by 24 ejections of adhesive supply nozzle, and powder stirs by main stirring vane 26a and auxiliary stirring vane 26b, forms particle thus.In the case, the degree of granulation can change by the rotating speed of adjusting main stirring vane 26a and/or auxiliary stirring vane 26b and the feed speed that changes granulation binders liquid as requested.
Below will to a kind of have spouted bed granulate the district spray drying granulator equipment be described for example as follows.
Fig. 3 is that the schematic diagram of a spray-drying spouted bed facility for granulating is in order to show an alternative embodiment of the invention.As shown in Figure 3, the main body 40 of this equipment is provided with a spray-drying district 41 and spouted bed district 42 that granulates at an upper portion thereof and is arranged on its underpart.This spray-drying district 41 is that a cylindrical shape part 41a and a conical portion 41b form.A drainage tube 43 is arranged in the spouted bed granulation district 42.The main body of this equipment disposes: a feed liquid spray nozzle 44 is such as a drive nozzle, second fluid nozzle or rotating disc sprayer; An adhesive supply nozzle 45 is such as a second fluid nozzle that is used to supply with the granulation binder liq; One is used for spray-dired hot air blowers 46; A spouted bed air blast 47; With a hot air outlet 48, will go out from the toxic emission in spraying dry section 41 and spouted bed granulation district 42 by this outlet.This hot air outlet 48 be form in the upper end of the lower end of cylindrical shape part 41a and conical portion 41b so just form an annular configuration.This hot air outlet 48 also can be arranged on the top of cylindrical shape part 41a.
Being provided with one first separator 49 is used for reclaiming thin particulate by waste gas.The fine particles that reclaims by this first separator 49 is back to spouted bed granulation district 42 through recovery particulate import 50.This first separator 49 disposes an air exhauster 49a.
Being provided with a kind of device 50 is used for the product that the district 42 that granulated by spouted bed discharges being dried and cooling off.This oven dry and cooling device can be the devices of the known horizontal liquid drier of people type.Hot-air 52 and the cold air 53 supplied with below by table top 51 all are blown in this oven dry and the cooling device 50.
One second separator 54 is used to handle the waste gas from product oven dry and cooling device 50, and the waste gas that will arrange from this separator and the waste gas stream of first separator 49 be connected together, and is disposed to the outside of system thus.The fine particles that reclaims by second separator 54 all is back to recovery particulate import 50.
The course of work to this equipment is described as follows:
In spray-drying district 41, a kind of feed liquid atomizes by feed liquid supply nozzle 44, and the droplet that will form thus is blown into this district by hot air blowers 46 hot-air dried, and so just becomes thin particulate.These fine particles fall by this cylindrical shape part 41a, dry simultaneously, arrive tapered segment 41b then.This oven dry hot-air is discharged into the outside through a hot air outlet 48.This material is dried into the dried particulate face that contains 4% the moisture content of having an appointment and is easy to and handles, because the material of drying does not need to keep its water content 7%, also will be described by way of example below.The aridity that so just can make formed particulate under the fluidized granulation condition is than much bigger with the conventional formed aridity of method, and the material that has prevented formed drying in the condition of work scope of broad effectively attached to conical portion 41b on.
In spouted bed was granulated district 42, a kind of granulation binders solution was upwards ejected by binder liq nozzle 45.Meanwhile, the particulate of formation underspeeds then, and begins to drop in the expansion area 56 owing to the hot air acting that is blown into drainage tube 43 inside through aperture plate 55 more than upwards flows.In this ringing process, formed particle.In this case, the degree of granulation can change by the speed that speed that changes the granulation solution supply and the time of adjusting the particulate stop and hot-air are supplied with.The hot-airs of being discharged by spouted bed granulation district 42 emit through hot air outlets 48.
Now will adopt the gained result that tests of equipment of the present invention to be described below.
Example 1:
Employing have granulation binders nozzle shown in Figure 5 routine spray dryer apparatus and carry out the contrast test that a kind of granulation that contains amino acid material carries out according to equipment of the present invention shown in Figure 1 and be described as follows:
The containers size of every kind of equipment that is used for current contrast test is as follows:
The diameter of cylindrical shape part 2a: 2200 millimeters
The height of cylindrical shape part 2a: 3000 millimeters
The height of conical portion 2b: 1900 millimeters
Compare between following two kinds of conditions: a kind of condition is to dispose granulation binders fluid injector 5(the present invention in fluidized granulation district 3); And another kind of condition is not dispose granulation binders fluid injector 5(conventional equipment).
Conventional equipment:
Spray-drying district 2
Hot-air inlets temperature: 200 ℃
Outlet temperature: 95 ℃
Feed liquid feed speed: 30 kilograms/hour
Binder liq concentration: 40%
Water content when finishing oven dry: 5 to 7%
Fluidized granulation district 3
Hot-air inlets temperature: 70 ℃
Outlet temperature: 60 ℃
Fluidized granulation adhesive feed speed: do not supply with
Granulation binders fluid temperature: do not supply with
Water content in fluid bed: about 4%
The present invention:
Spray-drying district 2
Hot-air inlets temperature: 210 ℃
Outlet temperature: 95 ℃
Feed liquid feed speed: 30 kilograms/hour
Feed liquid concentration: 40%
Water content when finishing oven dry: about 40%
Fluidized granulation district 3
Hot-air inlets temperature: 85 ℃
Outlet temperature: 50 ℃
Fluidized granulation adhesive feed speed: 1.8 kilograms/hour
Granulation liquid concentration: 40%
Water content in fluid bed: about 4%
After this test, the granularity of the particle that is obtained under the action condition in the equipment of routine is 100 to 150 microns.Its rate of recovery is 30%, and remaining raw-material amount is about 70% all attached to conical portion with on some positions above the fluid bed and can not reclaim.The rate of recovery of gained under other condition of work than above-mentioned condition under gained also smaller.Under the condition of work of equipment of the present invention, the material that does not have drying basically is attached to sidewall surfaces, and the particle mean size of the particle that is obtained is 150 microns, and its rate of recovery is about 90%.
When adhesive flow speed is reduced to certain value, be that the particle mean size of the particle that obtained under 90% condition is about 100 microns just in the rate of recovery.
According to the present invention, another installs as shown in Figure 4, is adaptable.This equipment is provided with a rotating spoon 16 and is used to smash bigger particle so that form than homogeneous granules in its fluidized granulation district 3.
Example 2
Adopt equipment shown in Figure 2.
The container of this equipment embodiment is the upper container of determining with following described size by:
The diameter of cylindrical shape part 21a: 2200 millimeters
The height of cylindrical shape part 21a: 3000 millimeters
The height of conical portion 21b: 2500 millimeters
With one its highly be that 400 millimeters and diameter are that the bottom container of 300 millimeters jar shape is joined together to form.
Spray-drying district 21
Hot-air inlets temperature: 210 ℃
Outlet temperature: 95 ℃
Feed liquid feed speed: 30 kilograms/hour
Feed liquid concentration: 40%
Water content when oven dry is finished: about 4%
Stir the district 22 that granulates
290 millimeters of main stirring vane: φ, 200 rev/mins
80 millimeters of auxiliary stirring vane: φ, 1450 rev/mins
Stir the granulation binders feed speed: 1 kilogram/hour
Granulation binders temperature: 40 ℃
Water content in fluid bed: about 4%
Its result does not have the material of drying basically attached on the sidewall surfaces, and is that to obtain particle mean size under 90% the condition be 150 microns particle in the rate of recovery.
Example 3
Adopt equipment shown in Figure 3.
The container of this equipment embodiment is the upper container of determining by with following described size:
The diameter of cylindrical shape part 41a: 2200 millimeters
The height of cylindrical shape part 41a: 3000 millimeters
The height of conical portion 41b: 2700 millimeters
With one its highly be that 650 millimeters and diameter are that bottom container 180 millimeters and that to be provided with a diameter therein be 80 millimeters drainage tube is joined together to form.
Spray-drying district 41
Hot-air inlets temperature: 210 ℃
Outlet temperature: 95 ℃
Feed liquid feed speed: 30 kilograms/hour
Feed liquid density: 40%
Water content when oven dry is finished: about 4%
Spray-drying district 42
Hot-air inlets temperature: 70 ℃
Outlet temperature: 60 ℃
Granulation binders feed speed: 1.5 kilograms/hour
Granulation binders temperature: 40 ℃
Water content in spouted bed: about 4%
Mean residence time: 20 minutes
Consequently, the material of drying is basically attached on the sidewall surfaces, and is that to obtain its granularity under 90% condition be 100 microns particle in the rate of recovery.
When adhesive flow speed is reduced to certain level, can be that to obtain the particle mean size value under 90% the condition be 1100 microns particle in the rate of recovery.
The advantage that the following aspects is arranged according to equipment of the present invention like this:
A) because the granulation nozzle is arranged in the granulation district that is separated with feed liquid supply atomizer, just there is no need the incomplete oven-dried condition of spray-dired fine particles is kept high water content. Therefore, fine particles just can be dried to a wider dryness fraction scope, and can granulate and on the non-cohesive side surface at container, so just improved the rate of recovery of particle by the binder liq in the district that granulates.
B) the granulation degree in the district that granulates can be adjusted and has nothing to do with the top baking zone by the feed speed that changes granulation binders liquid.
C) delivery temperature in each active region of equipment of the present invention can reduce, and meanwhile the temperature capable of regulating of hot-air is on high level. Therefore just might under lower energy consumption condition, produce a large amount of particles. In addition, just there is no need in spraying baking zone for thin particulate is provided, thereby will adopt the secondary cooling air of required employing in having the arranging of discrete granulation device.
Like this present invention even require those can be provided under the condition of work of relaxing and to granulate continuously as containing amino acid material at the special material of granulating under the condition of water content narrow range itself.
Claims (9)
1, a kind of spray drying granulator equipment, it comprises:
Cylindrical shape part (2a) and a conical portion (2b) and the spray-drying district (2 of having in the formation of the top of a container, 21), this spray-drying district includes a feed liquid and supplies with atomizer (4), the hot air outlet (8) of the upper end of hot air inlet that connects hot air blowers (6) and lower end that is positioned at cylindrical shape part (2a) and conical portion (2b), the feed liquid particulate that atomizer (4) ejects is by the hot air dries powdered
It is characterized in that,
This spray drying granulator equipment also comprises a granulation district (3) that forms in the bottom of this container, this granulation district includes the products export that a nozzle (5) that is used to send to a kind of binder liq and are connected in the device that particle is taken out continuously by above-mentioned granulation district (3), is discharged through above-mentioned hot air outlet (8) by the hot-air that the district (3) that granulates discharges.
2, equipment as claimed in claim 1 is characterized in that, this granulation district (3) disposes agitating device (26) and is suitable for stirring granulation.
3, equipment as claimed in claim 2 is characterized in that, this agitating device (26) comprises that the primary blades (26a) that can rotate around vertical axis and one can be around the auxiliary stirring vanes (26b) of horizontal axis rotation.
4, equipment as claimed in claim 1 is characterized in that, this granulation district is provided with the fluidized bed granulation device and is suitable for carrying out fluidized bed granulation.
5, equipment as claimed in claim 1 is characterized in that, this granulation district is provided with spouted bed granulation device (42,47) and is suitable for carrying out spouted bed and granulates.
6, equipment as claimed in claim 1 is characterized in that, described feed liquid is supplied with atomizer and comprised that a press atomization chews (23).
7, equipment as claimed in claim 1 is characterized in that, described feed liquid is supplied with atomizer and comprised that one two fluid spray chews.
8, equipment as claimed in claim 1 is characterized in that, described feed liquid is supplied with atomizer and comprised a rotating disc pattern.
9, equipment as claimed in claim 1 is characterized in that, the described binder liq supply nozzle (24) that is arranged in the above-mentioned granulation district comprises one two fluid spray spray group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88102319 CN1023974C (en) | 1987-04-27 | 1988-04-14 | Spray-drying granulation apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10380287A JPS63267401A (en) | 1987-04-27 | 1987-04-27 | Method and equipment for spray drying |
| CN 88102319 CN1023974C (en) | 1987-04-27 | 1988-04-14 | Spray-drying granulation apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1036911A CN1036911A (en) | 1989-11-08 |
| CN1023974C true CN1023974C (en) | 1994-03-16 |
Family
ID=25742441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88102319 Expired - Fee Related CN1023974C (en) | 1987-04-27 | 1988-04-14 | Spray-drying granulation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023974C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101919443B (en) * | 2009-12-31 | 2012-06-27 | 杭志奇 | Absorption type low-temperature drying tower |
| CN103506052B (en) * | 2013-10-24 | 2016-04-27 | 如皋市长江食品有限公司 | Potassium sorbate granule granulating system |
| CN104162401B (en) * | 2014-09-02 | 2016-04-20 | 济南大学 | A kind of calcium stearate catalytic reaction drier and using method thereof |
| IL235751A0 (en) * | 2014-11-18 | 2015-02-26 | Omrix Biopharmaceuticals Ltd | An addition to a spray dryer |
| EP3097962B1 (en) * | 2015-05-29 | 2020-05-13 | Symrise AG | Device for making spray-dried agglomerates |
| CN106213553A (en) * | 2016-09-29 | 2016-12-14 | 芜湖市三山区绿色食品产业协会 | A kind of comminutor for food processing and operational approach thereof |
| CN108261396B (en) * | 2016-12-30 | 2021-12-24 | 北京化工大学 | Granulation method |
| CN109984236A (en) * | 2019-04-30 | 2019-07-09 | 福建安溪铁观音集团股份有限公司 | A kind of production technology of instant tea powder and spray dryer discharger applied to the technique |
-
1988
- 1988-04-14 CN CN 88102319 patent/CN1023974C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1036911A (en) | 1989-11-08 |
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