SI23447A

SI23447A - Process device for granulating and lining of solid particles

Info

Publication number: SI23447A
Application number: SI201000256A
Authority: SI
Inventors: Dušan Teslić
Original assignee: Brinox D.O.O.
Priority date: 2010-08-24
Filing date: 2010-08-24
Publication date: 2012-02-29
Also published as: RU2013111654A; WO2012026890A2; EP2608876A2; WO2012026890A3

Abstract

Process device for granulating and lining of solid particles relates with a technical field of particles lining and particular with devices for spraying the lining liquid or suspension into the fluidized particle layer. Process device for granulating and lining of solid particles where there is a distribution panel (4) of process medium situated inside the wall (2) in the mentioned device. Through this panel (4) there is mounted at least one nozzle (15) for atomizing of the lining or granulating liquid. Beneath the distribution panel (4) there is a housing (3) for introducing the process medium (5) through this panel (4) into the area above this panel (4). The construction of the nozzle (15) for atomizing the solution enables the collecting of a portion of the process medium (5) from the area beneath the distribution panel (4) through a channel (12) which is mounted concentrically around the nozzle (15) and in the same flow direction as the spraying solution (7).

Description

PROCESNA NAPRAVA ZA GRANULIRANJE IN OBLAGANJE TRDNIH DELCEVPROCESSING PLANT FOR GRANULATING AND COATING SOLID PARTICLES

Predmet izuma je procesna naprava za granuliranje in oblaganje trdnih delcev. Predstavljeni izum se nanaša na tehnično področje oblaganja delcev, še posebej na področje naprav za brizganje oblagalne tekočine ali suspenzije v fluidiziran sloj delcev.The subject of the invention is a process device for granulating and coating particulate matter. The present invention relates to the technical field of particle coating, in particular to the field of devices for injecting a coating fluid or suspension into a fluidized bed of particles.

Tehnični problem, ki ga predložena naprava po izumu uspešno rešuje, je izboljšanje ekonomičnosti naprave ob hkratnem zagotavljanju kvalitete produkta pri oblaganju in granuliranju v fluidiziranem sloju.A technical problem that the present invention successfully solves with the invention is to improve the economy of the device while ensuring the quality of the product when coated and granulated in the fluidized bed.

Izum se nanaša na napravo za obdelavo materiala v obliki trdnih delcev. Sestavni del naprave je procesna komora, v kateri poteka is obdelava trdnih delcev. Dno procesne komore je sestavljeno iz distribucijske plošče medija. Skozi distribucijsko ploščo medija so nameščene šobe za brizganje oblagalne ali granulirne raztopine na material v procesni komori. Izvedba šobe omogoča kontroliran zajem procesnega medija iz območja pod distribucijsko ploščo medija, ki potem kot sekundarni medij prehaja skozi šobo v del komore nad distribucijsko ploščo skozi kanal, ki je izveden tako, da koncentrično obdaja medij za razprševanje in raztopino za razprševanje.The invention relates to a device for treating particulate matter. An integral part of the apparatus is the process chamber in which particulate matter is treated. The bottom of the process chamber consists of a media distribution board. Nozzles for injecting a coating or granulating solution onto the material in the process chamber are mounted through the media distribution board. The nozzle design allows for a controlled capture of the process medium from the area below the distribution plate, which then passes through the nozzle through the nozzle into the part of the chamber above the distribution plate through a channel, which is arranged in such a way that it concentrically surrounds the spray medium and the spray solution.

Oblaganje sipkih materialov je prisotno v farmacevtski, kemijski in živilski industriji. Za namene oblaganja so do sedaj že bile razvite posebne naprave. Ena izmed njih je tudi tako imenovana VVursterjeva komora, kjer je nad distribucijsko ploščo nameščen razmejitveni valj. V območju pod razmejitvenim valjem je delež perforacije na distribucijski plošči večji kot v območju okrog razmejitvenega valja. Pri tovrstnih napravah je lahko problem efekt spray dryinga, ki vodi k nižjemu izkoristku oblagalne substance. Ker se je aglomeraciji potrebno izogniti, je potrebno delce, ki so se zaradi brizganja sveže namočili, zadrževati med seboj čim bolj narazen. To dosežemo z namestitvijo šobe na dno sušilnika pod razmejitveni valj, kjer se delci nabrizgajo in potem v redkem sloju potujejo skozi razmejitveni valj navzgor, kjer se posušijo topila in se relativno nelepljivi vrnejo v gost fluidiziran sloj, ki se nahaja okoli razmejitvenega valja.Bulk coating is present in the pharmaceutical, chemical and food industries. To date, special devices have already been developed for coating purposes. One of them is the so-called Wurster chamber, where a dividing cylinder is mounted above the distribution plate. In the area below the dividing cylinder, the perforation ratio on the distribution plate is greater than in the area around the dividing cylinder. For such devices, the problem of spray drying may be a problem, leading to a lower yield of the coating substance. As agglomeration is to be avoided, particles that have been freshly soaked in the spray must be kept as far apart as possible. This is accomplished by placing the nozzle at the bottom of the dryer underneath the delimiter cylinder, where the particles are injected and then, in a thin layer, travel through the delimiter cylinder upwards, where the solvents dry and return relatively non-sticky fluid to the dense fluidized layer located around the delimiter cylinder.

Tudi naprava proizvajalca Huttlin, opisana v patentnem dokumentu DE19709589 deluje na principu brizganja tekočine za oblaganje ali granuliranje skozi distribucijsko ploščo na dnu sušilnika. Smer brizganja šob je poravnana s smerjo procesnega medija, ki prehaja skozi distribucijsko ploščo. Posebna izvedba šobe, ki jo opisuje patentni dokument DE3806537 ima poleg dovoda medija za razprševanje še dovod medija za ustvarjanje mikroklime. To je komprimiran medij, ki preprečuje mašenje šob, hkrati pa je namenjen tudi preprečevanju prehoda delcev skozi območje tik ob šobi, kjer oblak atomizirane tekočine še ni formiran in je zato v tem območju vlažnost visoka, in kjer bi se delci sicer lahko pretirano omočili, kar bi povečalo možnost neželenega pojava aglomeracije pri procesu oblaganja oziroma pretiranega skepljenja delcev pri procesu granulacije. Ker je brizganje tekočine izvedeno direktno v sloj materiala, je efekt izgube materiala zaradi spray dryinga zmanjšan, zato naj bi bil izkoristek tovrstnih naprav višji. Po drugi strani pa naj bi bila slaba stran omenjene tehnologije visoka stopnja krušenja delcev, ki vodi k nižjemu izkoristku naprave. Slaba stran je dodatna poraba instrumentnega medija za ustvarjanje mikroklime. Poleg tega je potrebno instrumentni medij za mikroklimo dodatno kondicionirati, razen v primeru, če medij za mikroklimo s pomočjo ventilatorja ali kompresorja zajemamo iz procesnega medija. Oboje je povezano z višjimi investicijskimi in obratovalnimi stroški.Also, the Huttlin device described in patent document DE19709589 operates on the principle of injection of a coating or granulating liquid through the distribution plate at the bottom of the dryer. The direction of nozzle injection is aligned with the direction of the process medium passing through the distribution plate. The special nozzle embodiment described in patent document DE3806537 has a microclimate media inlet in addition to the diffusion medium supply. It is a compressed medium that prevents nozzles from clogging, but is also designed to prevent particles from passing through the area near the nozzle where the cloud of atomized fluid has not yet formed and therefore the humidity is high in the area, and where the particles could otherwise be wetted, which would increase the possibility of an undesired occurrence of agglomeration during the coating process or excessive particle entrapment in the granulation process. Since the injection of liquid is carried out directly into the material layer, the effect of material loss due to spray drying is reduced, so the efficiency of such devices should be higher. On the other hand, the downside of the technology is the high degree of particle crunching that leads to lower utilization of the device. The downside is the extra use of instrument medium to create the microclimate. In addition, the microclimate instrument medium must be further conditioned, unless the microclimate medium is extracted from the process medium by means of a fan or a compressor. Both are associated with higher investment and operating costs.

Izum proizvajalca Aeromatic-Fielder, ki je opisan v dokumentu WO 2009/007788 rešuje problematiko kvalitete oblaganja in granuliranja v primeru brizganja granulirne tekočine v sloj v smeri radialno navznoter (side spray), s šobo, ki je nameščena na steno procesne komore. Opisuje napravo, namenjeno tako granuliranju kot oblaganju. Tok medija, ki ga zajemamo iz območja pod distribucijsko ploščo, ob šobi, ki je nameščena na steni komore in brizga granulirno oziroma oblagalno raztopino v fluidiziran sloj delcev v radialni smeri, odnaša material iz območja okoli šobe. Tako se tekočina za oblaganje lahko atomizira v celoti, oblaganje je neagresivno, ker je tlak medija okoli šobe relativno nizek. Zaradi tega ne prihaja do abrazije. Ker je omogočen nastanek majhnih kapljic, ne prihaja do aglomeracije. Ker za medij, ki odnaša material iz območja okoli ustja šobe, uporabimo kar procesni medij, se kaže prednost izvedbe tudi v tem, • · tem, da ne potrebujemo dodatnega vira medija, kar bi lahko bilo povezano z višjimi investicijskimi stroški. Slabost izvedbe brizganja v sloj s strani se kaže v omejitvi glede potrebne višine sloja. Pri dani velikosti naprave je minimalna potrebna višina sloja, ki zagotavlja visok materialni izkoristek precej višja, kot je pri napravi, kjer poteka brizganje v fluidiziran sloj skozi dno.The Aeromatic-Fielder invention described in WO 2009/007788 solves the problem of the quality of coating and granulation in the case of injection of granular fluid into the layer in a radial inward direction (side spray) with a nozzle mounted on the wall of the process chamber. Describes a device for both granulation and coating. The flow of medium, which is captured from the area under the distribution plate, by the nozzle mounted on the chamber wall and sprays a granulating or coating solution into the fluidized bed of particles in the radial direction, removes material from the area around the nozzle. Thus, the coating fluid can be fully atomized, the coating is non-aggressive because the pressure of the medium around the nozzle is relatively low. This does not result in abrasion. Because small droplets are formed, no agglomeration occurs. Because the media that removes material from the area around the mouth of the nozzle is used as a process medium, the advantage is shown in the fact that it does not require an additional source of media, which could be associated with higher investment costs. The disadvantage of injection molding into the layer from the side is due to the limitation on the required layer height. For a given device size, the minimum required height of the layer, which provides high material efficiency, is much higher than that of the device where injection into the fluidized bed through the bottom takes place.

Cilj predstavljenega izuma je tehnično usmerjen k izvedbi naprave, ki omogoča pridobivanje obloženih delcev z gladko površino in nizko tendenco tvorbe aglomeratov oz. visoko stopnjo enojnih obloženih delcev ob hkratnem doseganju visokega materialnega izkoristka. V okviru tega cilja je predstavljena izvedba šobe za brizganje raztopin za oblaganje ali granuliranje, ki bo omogočala izrabo procesnega medija za zagotavljanje zaščitnega sloja medija okoli območja brizganja tudi v primeru brizganja skozi distribucijsko ploščo na dnu komore (bottom spray). Izvedba šobe, is ki je predmet izuma, omogoča enostavno nastavitev pretoka zaščitnega medija (mikroklime) tudi med samim procesom oblaganja oziroma granuliranja.The object of the present invention is technically directed to an embodiment of a device which enables the production of coated particles with a smooth surface and a low tendency to form agglomerates or. a high degree of single coated particles while achieving high material efficiency. As part of this objective, a spray nozzle embodiment for coating or granulating solutions is presented, which will allow the use of a process medium to provide a protective layer of medium around the injection area, even if sprayed through the distribution plate at the bottom of the chamber (bottom spray). The embodiment of the nozzle subject of the invention makes it easy to adjust the flow of the protective medium (microclimate) even during the coating or granulation process itself.

Predstavljeni izum omogoča ohraniti vse prednosti brizganja raztopine skozi dno, ob hkratnem izboljšanju ekonomike procesa in znižanja investicijskih stroškov postrojenja za oblaganje ali granuliranje. Razumljivo je, da se zgoraj omenjene in tudi lastnosti naprave, ki še bodo omenjene, lahko uporabijo v različnih medsebojnih in drugih kombinacijah, ne da bi se oddaljili od bistva predstavljenega izuma.The present invention allows to preserve all the advantages of solution injection through the bottom, while improving the economics of the process and reducing the investment costs of the coating or granulating plant. It is to be understood that the aforementioned and also the features of the device still to be mentioned can be used in various mutual and other combinations without departing from the essence of the present invention.

Izum bomo podrobneje obrazložili na osnovi izvedbenega primera in pripadajočih slik, od katerih kaže:The invention will be explained in more detail on the basis of an embodiment and accompanying drawings, of which:

slika 1 poenostavljen shematski prikaz izvedbe komore za granuliranje;Figure 1 is a simplified schematic representation of the performance of the granulation chamber;

slika 2a,b izvedbo šobe za brizganje raztopine za oblaganje ali granuliranje;Fig. 2a, b is an embodiment of a spray nozzle for coating or granulating solution;

io Predstavljeni izum se nanaša na napravo za sušenje, granuliranje ali oblaganje trdnih delcev oz. sipkih materialov z brizganjem raztopine direktno v sloj delcev od spodaj, pri čemer je šoba za atomizacijo raztopine za granuliranje ali oblaganje nameščena v sloj delcev skozi distribucijsko ploščo, pri čemer je šoba nameščena v kanal, skozi katerega ob šobi iz območja pod distribucijsko ploščo medija v zgornji del procesne komore prehaja procesni medij, pri čemer je delež procesnega medijas, ki v zgornji del komore prihaja skozi kanal ob šobi, možno uravnavati z nastavitvijo velikosti odprtine za zajem procesnega medija v kanal ob šobi.io The present invention relates to a device for drying, granulating or coating particulate matter. the bulk materials by injection of the solution directly into the particle layer from below, wherein the atomizer for atomizing the granulation or coating solution is positioned in the particle layer through the distribution plate, the nozzle being positioned in a channel through which the nozzle from the area below the distribution plate in the upper part of the process chamber passes the process medium, whereby the proportion of the process medias coming into the upper part of the chamber through the nozzle channel can be adjusted by adjusting the size of the opening for receiving the process medium into the nozzle channel.

Na sliki 1 je shematski prikaz naprave po izumu. Naprava 1 je sestavljena iz zgornjega dela 16 komore, omejenega z zgornjo steno 2 komore, ki je od spodnjega dela 17 komore, ki jo omejuje spodnja stena komore 3, razmejena z distribucijsko ploščo 4. Medij 5, npr. plin - procesni • · medij, prehaja v procesno komoro skozi številne odprtine 6 na dnu procesne komore, ki so del distribucijske plošče 4. Ključni predmet predstavljenega izuma je izvedba šobe 15 za brizganje raztopine za oblaganje ali granuliranje, ki omogoča kontroliran zajem procesnega medija 5 iz območja pod distribucijsko ploščo 4. Ta zajeti procesni medij 5, največkrat zrak, ima funkcijo medija 5a za odpihovanje delcev iz območja formiranja atomiziranega oblaka brizgane raztopine 7, kjer je vlažnost največja. Nad vrhom šobe 15 se tako tvori območje, kjer ni delcev. Na ta način se lahko oblak atomizirane raztopine 7 bolj razvije, kot bi se sicer. io Posledica prehoda delcev skozi to območje bi sicer lahko bila neželena aglomeracija pri procesu oblaganja, oziroma pretirano skepljenje delcev pri procesu granulacije, posledično se lahko na vrhu šobe 15 tvorijo obloge, v skrajnem primeru pa se šoba 15 lahko tudi zamaši. Ta zajeti medij 5a prehaja v zgornji del komore koncentrično in z zunanje strani is glede na brizgano raztopino 7 in medij 8 za razprševanje skozi kanal 12, ki obdaja dvokomponentno šobo za razprševanje. Smer toka medija 5a je enaka smeri brizganja oblagalne ali granulirne raztopine. Iz območja komore pod distribucijsko ploščo 4 prehaja procesni medij v kanal 12 skozi odprtino 9, ki je izvedena na ohišju, ki obdaja dvokomponentni del šobe.Figure 1 is a schematic view of a device according to the invention. Apparatus 1 consists of an upper part 16 of the chamber bounded by the upper wall 2 of the chamber, which is delimited by the distribution plate 4 from the lower part 17 of the chamber bounded by the lower wall of the chamber 4. Medium 5, e.g. gas - process medium · enters the process chamber through a number of openings 6 at the bottom of the process chamber that form part of the distribution plate 4. A key object of the present invention is to provide a nozzle 15 for spraying a coating or granulation solution to allow controlled capture of process medium 5 from the area below the distribution plate 4. This covered process medium 5, most often air, has the function of a particle blowing medium 5a from the area of formation of an atomized cloud of injection solution 7, where the humidity is highest. Over the top of the nozzle 15, an area free of particles is formed. In this way, the cloud of atomized solution 7 can develop more than it would otherwise. io The particle passage through this area could otherwise result in unwanted agglomeration during the coating process, or excessive particle aggregation during the granulation process, as a result, deposits may form on the top of the nozzle 15, and in the extreme case the nozzle 15 may become clogged. This covered medium 5a passes concentrically and externally to the upper part of the chamber with respect to the injection solution 7 and the spray medium 8 through the channel 12 surrounding the two-component spray nozzle. The direction of flow of the medium 5a is the same as the injection of the coating or granulation solution. From the chamber area below the distribution plate 4, the process medium enters the channel 12 through the opening 9, which is made on the housing surrounding the two-component part of the nozzle.

Šoba 15 je v distribucijsko ploščo 4 nameščena tako, da ne prihaja do interakcij med oblakom atomizirane brizgane raztopine 7 in sestavnimi deli procesne komore.The nozzle 15 is positioned in the distribution plate 4 in such a way that there is no interaction between the cloud of atomized injection solution 7 and the components of the process chamber.

Na sliki 2 je prikazana izvedba šobe 15 za brizganje raztopine za oblaganje oziroma granuliranje. Procesni medij 5 vstopa v šobo 15 skozi odprtino 9 za zajem procesnega medija. Procesni medij 5 preko te odprtine skozi anularno režo, ki je določena kot prostor med vrtljivim ohišjem 10 in fiksnim ohišjem 11 na zunanji strani ter notranjim delom šobe 15, prehaja skozi ustje šobe 15 v območje brizganja raztopine. Šoba 15 sestoji iz centralnega dela, ki je v dosedanjem stanju tehnike dobro poznan kot dvokomponentna šoba za razprševanje tekočine. Skozi ta del potekata dovod raztopine 7 ter dovod medija 8 za razprševanje, ki ga v io tem opisu imenujemo primarni medij. Centralni del šobe 15 je obdan s kanalom 12 za dovajanje sekundarnega medija 5a, v tem primeru procesnega plina, zajetega pod distribucijsko ploščo 4. Ta kanal 12 je z zunanje strani omejen z valjem, na katerem se nahaja najmanj ena odprtina 9, ki služi zajemu sekundarnega medija. Okoli tega valja je nameščen večji valj 10, na katerem se prav tako nahaja najmanj ena odprtina, ki služi prehodu sekundarnega medija. Zunanji valj je vrtljiv. Z rotiranjem tega zunanjega valja okoli osi lahko nastavljamo velikost odprtine za zajem sekundarnega medija. Odprtine na obeh valjih so izvedene tako, da je možno odprtino popolnoma zapreti. Z nastavitvijo velikosti te odprtine uravnavamo delež procesnega medija, ki ob/skozi šobo 15 za razprševanje prehaja v zgornji del komore za granuliranje proti mediju, ki v zgornji del komore prehaja skozi distribucijsko ploščo 4. Naprava 1 s šobo 15 je izvedena tako, da je možno delež odprtine za zajem medija nastavljati zunaj komore, kar omogoča nastavitev pretoka sekundarnega medija 5a tudi med samim obratovanjem naprave. Slika 2a prikazuje primer odprtega dovoda sekundarnega medija, slika 2b pa primer zaprtega dovoda sekundarnega medija.Figure 2 shows an embodiment of a nozzle 15 for spraying a coating or granulating solution. The process medium 5 enters the nozzle 15 through the opening 9 to capture the process medium. The process medium 5 passes through the opening through the annular slot, defined as the space between the rotating housing 10 and the fixed housing 11 on the outside and the inner part of the nozzle 15, passes through the mouth of the nozzle 15 into the injection area of the solution. The nozzle 15 consists of a central part, which is well known in the prior art as a two-component liquid nozzle. A solution solution 7 and a spray medium supply, referred to as the primary medium, are referred to in this section. The central part of the nozzle 15 is surrounded by a channel 12 for supplying the secondary medium 5a, in this case, the process gas covered by the distribution plate 4. This channel 12 is externally bounded by a cylinder having at least one opening 9 to serve the capture. secondary medium. A larger cylinder 10 is mounted around this cylinder and at least one opening is provided to serve the passage of the secondary medium. The outer cylinder is rotatable. By rotating this outer cylinder around the axis, the size of the opening to capture the secondary medium can be adjusted. The openings on both cylinders are designed so that the opening can be completely closed. By adjusting the size of this opening, the portion of the process medium that passes through the nozzle 15 to the upper part of the granulation chamber against the medium that passes through the distribution plate 4 to the upper chamber is controlled. Device 1 with nozzle 15 is arranged such that it is possible to adjust the portion of the media intake opening outside the chamber, which allows the secondary media flow 5a to be adjusted even during the operation of the device. Figure 2a shows an example of an open secondary media feed, and Figure 2b shows an example of a closed secondary media supply.

V kanal 10 za dovajanje sekundarnega medija 5a je v bližini ustja šobe 15 nameščena mrežica 14, ki preprečuje padanje materiala v območje pod distribucijsko ploščo. To je pomembno predvsem v času, ko ni pretoka procesnega medija, npr. ob morebitni ustavitvi procesa.A mesh 14 is provided near the mouth of the nozzle 15 in the secondary medium delivery port 5a, which prevents material from falling into the area below the distribution plate. This is especially important at times when there is no flow of process medium, e.g. upon possible termination of the process.

Izvedba distribucijske plošče 5 je lahko različna, npr. klasična io perforirana, ali pa izvedena na način, ki usmerja gibanje medija in s tem določa gibanje materiala v procesni komori na določen način, npr. tangencialno. V našem primeru je kot del procesne komore nameščena distribucijska plošča, ki jo opisuje Sl patentna prijava P-200900246.The implementation of distribution board 5 may be different, e.g. classical io perforated, or performed in a manner that directs the motion of the medium and thereby determines the movement of material in the process chamber in a particular way, e.g. tangentially. In our case, as part of the process chamber, there is a distribution board described by Sl patent application P-200900246.

Claims

A process unit for granulating and coating particulate matter, wherein 5 has a distribution plate 4 within the wall 2 having a process medium distribution plate 4 through which at least one nozzle 15 is atomized for coating or granulating fluid and located below the distribution plate 4 a housing 3 for supplying process medium 5 through the distribution plate 4 to the area above the distribution io plate 4, wherein the device is characterized in that the solution atomization nozzle (15) is arranged so that part of the process medium (5) from the area below The distribution plate (4) is captured and introduced into the area above the distribution plate (4) through the is channel (12), which surrounds the nozzle (15) concentrically and succinctly with respect to the injected solution (7).

A process device for granulating and coating particulate matter according to claim

1,

20, characterized in that the portion of the process medium (5a) that passes into the fluidized bed through the channel (12) adjacent to the nozzle (15) can be adjusted by rotation of the housing (10).

3. A process unit for granulating and coating particulate matter according to claims 1 and 2, characterized in that the nozzle (15) is arranged in such a way that it is possible to rotate

5 housing (10) outside the process chamber during the coating or granulation process.

Process particle granulation and coating process plant according to any one of the preceding claims, characterized in that the nozzle (15) is positioned at an angle to the horizontal plane in which the distribution plate is located through the distribution plate (4).

Process plant for granulating and coating particulate matter according to any one of the preceding claims, characterized in that the nozzle (15) consists of a central part through which the inlet of the solution (7) and the inlet of the spray medium (8) pass, wherein this central portion of the nozzle (15) is surrounded by a feed channel (12)

20 is a secondary medium, the channel being externally bounded by a cylinder (11) having at least one opening (9) serving to capture the secondary medium (5a), and a larger cylinder (10) located thereon. , which is rotatable about its axis and which also has at least one opening serving the passage of the secondary medium (5a).

Process particulate granulation and coating apparatus according to claim 5, characterized in that the ratio between the floor plan area of the secondary medium inlet (5a) and the surface of the solution / emulsion / dispersion inlet is in the range of 100 : 1 to 2: 1.

A process device for granulating and coating particulate matter according to claims

5 and 6, characterized in that by rotating the outer cylinder (10) about the axis, the size and aperture (9) can be adjusted to capture the secondary medium.