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WO1992016805A1 - Dispositif a air conditionne s'utilisant dans la production de pates alimentaires ou articles similaires - Google Patents

Dispositif a air conditionne s'utilisant dans la production de pates alimentaires ou articles similaires Download PDF

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Publication number
WO1992016805A1
WO1992016805A1 PCT/EP1992/000284 EP9200284W WO9216805A1 WO 1992016805 A1 WO1992016805 A1 WO 1992016805A1 EP 9200284 W EP9200284 W EP 9200284W WO 9216805 A1 WO9216805 A1 WO 9216805A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
tunnel
bank
traversed
pasta
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1992/000284
Other languages
English (en)
Inventor
Pier Luigi Conselvan
Gastone DIDONÈ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pavan Mapimpianti SpA
Original Assignee
Pavan Mapimpianti SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pavan Mapimpianti SpA filed Critical Pavan Mapimpianti SpA
Publication of WO1992016805A1 publication Critical patent/WO1992016805A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems

Definitions

  • This invention relates to an air conditioning system for pasta and the like.
  • Production processes for pasta and the like generally comprise a final drying stage in which the water content of the pasta is reduced to an average .of 10-13% by weight, to ensure a long product shelf life.
  • this operation is carried out under strongly drying conditions while the moisture content of the pasta is still high enough to keep it substantially plastic and hence able to accept a high drying rate without undergoing excessive stressing, after which gradually lessening drying conditions are used.
  • the pasta has firstly to be raised to the temperature required for commencing the drying cycle, after which it has to be reduced to ambient.
  • the subsequent cooling of the hot pasta with cold air can result in the heating of the cold air which grazes the surface of the hot pasta, to reduce the air humidity to a value which is too low, such as to cause excess drying.
  • An object of the invention is to achieve a climate which varies with substantial continuity within a continuous pasta drying process, hence overcoming .the drawbacks of known processes.
  • Figure 1 is a schematic longitudinal section through a system of the invention.
  • Figure 2 is a schematic cross-section therethrough.
  • the device of the invention comprises a tunnel 2 traversed longitudinally by a conveyor belt 4, on which the pasta 6 to be treated is placed.
  • the tunnel 2 is traversed longitudinaly by two banks of fins 8,8', each of which is provided with a pipe 10,10' for the unidirectional circulation of the thermal liquid, usually water, through the tunnel.
  • the pipe 10,10' extends to the outside of the tunnel 2 to form a hydraulic circuit connected to a heat exchanger 12,12'.
  • the hydraulic circuit comprises a three-way valve 14,14' for controlling the flow rate through the pipe 10,10' and a two- way control valve 16,16'. Both the valve 14,14' and the valve 16,16' are controlled by a temperature controller 18,18' fed by suitable sensors.
  • each bank of fins there is associated a probe 20,20' inserted into the pipe 10,10' to measure the temperature of the fluid entering the bank and a pair of air probes 22,22' and 24,24' positioned at the two ends of the bank and arranged to measure respectively the temperature and humidity of the air at the two ends of the tunnel 2.
  • the six probes 20,20',22,22',24,24' are connected to the temperature controllers 18,18', which preferably consist of a single computer or any other apparatus able to make mathematical calculations and be interfaced with the sensors and with the control members 14,14',16,16'.
  • the operation of the system according to the invention is as follows: if it is to be used for increasing the temperature and/or humidity of the environment, and hence for preparing the pasta for the drying cycle, the temperature of the fluid circulating through the bank of fins 8 is firstly controlled at the required value.
  • the control valve 16 which regulates the temperature of the heating fluid is opened to a greater or lesser extent such that the temperature of the air at one of the two probes 22 or 24 corresponds to the preset value.
  • the temperature controller 18 then also acts on the three-way valve 14 and hence on the flow rate of the heating fluid such that the temperature difference between the air at the two probes 22,24 is such as to cause the air at the other probe 24 or 22 to also reach the preset value.
  • the temperature controller 18' firstly acts on the control valve 16' to adjust the temperature of the fluid traversing the bank of fins 8' to such a value that the excess moisture condenses on this bank until the preset humidity is attained at one of the two probes 22' or 24' installed at the two ends of the tunnel 2. Said controller 18' then acts on the three-way valve 14' to vary the flow rate of the fluid through the pipe 10' until the temperature at the other end is such as to condense the required quantity of moisture to attain the set humidity also at thye other probe 24' or 22'.
  • the pasta leaving the tunnel 2 can then be fed to subsequent treatment.
  • the system of the invention is also suitable for creating within the tunnel 2 a climate which is continuously variable in the opposite direction, ie presenting a continuous temperature reduction and a continuous humidity variation, for example to reduce the temperature of the pasta leaving the drying stage still at high temperature to close to ambient temperature without this temperature reduction continuiing to dry the pasta to an undesirable extent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Noodles (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Le dispositif comprend: un tunnel (2), le long duquel on introduit la pâte à traiter, deux rangées (8, 8') d'ailettes s'étendant dans la longueur dudit tunnel (2) et traversées dans un seul sens par un fluide thermique, l'une des rangées (8) étant traversée par un fluide de réchauffement introduit à l'extrémité du tunnel par laquelle la pâte est évacuée, l'autre rangée (8') étant traversée par un fluide de refroidissement introduit, à une température inférieure au point de rosée, à l'extrémité du tunnel nécessitant la condensation la plus importante, une paire de détecteurs (22, 24) accouplés à la rangée d'ailettes (8) traversée par le fluide de réchauffement, afin de mesurer la température de l'air aux deux extrémités du tunnel, une paire de détecteurs (22', 24) accouplés à la rangée d'ailettes (8') traversée par le fluide de refroidissement, afin de mesurer l'humidité de l'air aux deux extrémités du tunnel, un détecteur (20') placé dans le conduit d'entrée du fluide de refroidissement (10') pour mesurer sa température, et au moins un dispositif de régulation de température (18, 18') relié auxdits détecteurs (22, 22', 24, 24'), afin de réguler, par l'intermédiaire de moyens de régulation (14, 14', 16, 16'), la température des fluides thermiques et leur débit, afin d'obtenir une différence de température prédéterminée entre l'entrée et la sortie de chaque rangée (8, 8').
PCT/EP1992/000284 1991-03-21 1992-02-10 Dispositif a air conditionne s'utilisant dans la production de pates alimentaires ou articles similaires Ceased WO1992016805A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE91A000017 1991-03-21
ITVE910017A IT1249511B (it) 1991-03-21 1991-03-21 Impianto di climatizzazione per paste alimentari e simili

Publications (1)

Publication Number Publication Date
WO1992016805A1 true WO1992016805A1 (fr) 1992-10-01

Family

ID=11423712

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/000284 Ceased WO1992016805A1 (fr) 1991-03-21 1992-02-10 Dispositif a air conditionne s'utilisant dans la production de pates alimentaires ou articles similaires

Country Status (2)

Country Link
IT (1) IT1249511B (fr)
WO (1) WO1992016805A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE262725C (fr) *
US1795094A (en) * 1927-10-31 1931-03-03 Olsson Johan Gustaf Apparatus for alternately heating and cooling circulating drying mediums during drying by means of the same
US3209465A (en) * 1962-09-18 1965-10-05 Conte Luna Foods Inc Method and apparatus for drying alimentary paste
WO1982003681A1 (fr) * 1981-04-22 1982-10-28 Louis Pavailler Four tunnel a chauffage par circulation d'huile destine a la cuisson de produits alimentaires
FR2571834A2 (fr) * 1981-04-22 1986-04-18 Pavailler Louis Four tunnel, a chauffage par circulation d'huile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE262725C (fr) *
US1795094A (en) * 1927-10-31 1931-03-03 Olsson Johan Gustaf Apparatus for alternately heating and cooling circulating drying mediums during drying by means of the same
US3209465A (en) * 1962-09-18 1965-10-05 Conte Luna Foods Inc Method and apparatus for drying alimentary paste
WO1982003681A1 (fr) * 1981-04-22 1982-10-28 Louis Pavailler Four tunnel a chauffage par circulation d'huile destine a la cuisson de produits alimentaires
FR2571834A2 (fr) * 1981-04-22 1986-04-18 Pavailler Louis Four tunnel, a chauffage par circulation d'huile

Also Published As

Publication number Publication date
IT1249511B (it) 1995-02-23
ITVE910017A0 (it) 1991-03-21
ITVE910017A1 (it) 1992-09-21

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