EP1167907B1 - Installation pour le séchage continu de produits en brique - Google Patents

Installation pour le séchage continu de produits en brique Download PDF

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Publication number
EP1167907B1
EP1167907B1 EP01202259A EP01202259A EP1167907B1 EP 1167907 B1 EP1167907 B1 EP 1167907B1 EP 01202259 A EP01202259 A EP 01202259A EP 01202259 A EP01202259 A EP 01202259A EP 1167907 B1 EP1167907 B1 EP 1167907B1
Authority
EP
European Patent Office
Prior art keywords
plant
chambers
chamber
tunnel
products
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.)
Expired - Lifetime
Application number
EP01202259A
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German (de)
English (en)
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EP1167907A1 (fr
Inventor
Elio c/o Piccinini Impianti S.r.l. Panizza
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.)
Piccinini Impianti Srl
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Piccinini Impianti Srl
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Publication of EP1167907A1 publication Critical patent/EP1167907A1/fr
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Anticipated expiration legal-status Critical
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/16—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by wheeled trucks
    • 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
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow

Definitions

  • This invention relates to a plant for drying products formed from clay mixes, in particular products presenting through holes.
  • Plants of known type for drying brick products presenting through holes generally comprise a tunnel through which hot air is circulated and through which trolleys carrying the product to be dried, known as greenware by the expert of the art, are fed.
  • the hot air stream heated to a temperature between 100°C and 120°C, which grazes the material to be dried, must have a direction parallel to the direction of the holes present in the material.
  • the material is generally disposed on the trolleys such that the axis of the holes is perpendicular to the trolley advancement direction, it is not possible to prevent the air stream from grazing the material in the trolley advancement direction, with consequent non-uniform drying of the material.
  • drying plants comprising a plurality of drying chambers connected in series, each defining a drying region isolated from and operating independently of the adjacent chamber.
  • the hot air is fed to and withdrawn from each chamber by suitable fans, to enable the drying process to be controlled independently for each chamber.
  • EP-A-877 220 showing a plant for the continuous drying of hollow brick products, comprising a tunnel provided with at least one entry door for trolleys carrying the products to be dried, and at least one exit door therefore, the interior of said tunnel being divided into a plurality of spaced-apart chambers, of which al least one is fed with a drying fluid, and at least one is provided with suction means for said fluid, said chambers mutually communication via a port through which said trolleys are made to advance, wherein said plurality of chambers are connected together, there being, associated with each chamber, at least one blower means positioned at one side of said products an arranged to direct the drying fluid onto them, the drying fluid being extracted successively from one of the chambers and then being conveyed to the next chamber.
  • the object of the present invention is to solve the problems of the known art within the framework of a rational and reliable solution, the constructional and operating costs of which are low.
  • the invention attains said object by a drying plant comprising a tunnel in which there are defined a plurality of communicating chambers disposed in succession and provided with apertures through which the products to be dried are passed, with each of said chambers there being associated at least one hot air blower means positioned on the side of the material to be dried, and arranged to cause the material to be grazed with a stream of drying fluid, for example hot air, perpendicular to the product advancement direction within said chamber.
  • the chambers mutually communicate via a duct to which said at least one blower means associated with each chamber is connected.
  • the drying fluid heated by suitable and usual means, is fed at least into that chamber positioned in proximity to the tunnel end region through which the dried material leaves, said fluid being extracted from said chamber before being conveyed to the next chamber by said duct.
  • said duct is provided in the false ceiling of said tunnel, and connects said at least one blower means associated with each chamber in such a manner that the drying fluid which grazes the products has the same direction but opposite sense in adjacent chambers.
  • the products to be dried are preferably disposed on trolleys provided at their front and rear with a wall (or plate) able to close the aperture through which the trolleys pass from one chamber to the other, and so prevent air passage from one chamber to the adjacent chamber in a direction countercurrent to the trolley advancement direction.
  • each chamber accommodates at least two mutually parallel trolleys (disposed in two parallel rows), said blower means being disposed such as to graze the material in one chamber from the centre of the chamber towards its periphery, and in the next chamber from the periphery towards the centre.
  • At least one of the plant chambers close to the region of entry of the green material to be dried is provided with heating means for the drying fluid, for example at least one burner, which raise the temperature of the drying fluid without decreasing its moisture content.
  • heating means for the drying fluid for example at least one burner, which raise the temperature of the drying fluid without decreasing its moisture content.
  • Said figures show the plant 1, comprising a tunnel 2 into which are inserted the trolleys 5 on which the products to be dried, such as hollow bricks or tiles, are disposed.
  • the trolleys 5 are inserted into the tunnel through two doors 20 and extracted through two doors 21 located at the opposite end of the tunnel 2.
  • the tunnel 2 presents a horizontal false ceiling 3 which separates its interior into a lower region A and an upper region B, as can be seen from Figures 2 and 3.
  • the lower region A of the tunnel is further divided into a plurality of chambers C' and C" ( Figure 5) disposed in succession and spaced one from another, they comprising free openings, corresponding with and aligned with each other, through which the tunnels 5, disposed in two parallel rows, are passed.
  • the false ceiling 3 presents three parallel equidistant apertures 30 elongate in the advancement direction of the tunnels 5. Some of said apertures 30 receive the lower part of suitable blower means 8, which descend from the upper region B of the tunnel 2 and are provided to feed the drying fluid, for example hot air, into the chambers C' and C".
  • the chambers C' and C" are of equal dimensions but differ from each other by the number and arrangement of the blower means 8.
  • the chambers C' and C" are of equal dimensions but differ from each other by the number and arrangement of the blower means 8.
  • the chambers C' four equal blower means 8 are present descending in pairs from the apertures 30 positioned in proximity to the side walls of the chamber, whereas in the chambers C" three blower means are present all descending from the aperture 30 at the centre of the chamber.
  • blower means 8 associated with the chambers C' direct the drying fluid from the periphery of the chamber towards the centre, whereas the blower means 8 associated with the chambers C" direct the drying fluid from the centre of the chamber towards its periphery.
  • the blower means 8 comprise a fan 80 and a frusto-conical distributor 81, in the side wall of which at least one vertical slit 82 is provided facing the products 6 to be dried.
  • Said slit 82 is provided with a parallelepiped perimetral rim arranged to direct the flow of drying fluid in a direction perpendicular to the direction in which the tunnels 56 advance within the tunnel 2.
  • the position of the slit 82 and hence of its rim 83 varies on the basis of the location of the blower means within the chamber C' and C", such that the drying flow grazes the entire lateral surface of the tunnels 5.
  • blower means 8 associated with the chambers C' comprise only one slit 82, whereas the blower means 8 associated with the chambers C" are provided with two equal and opposite slits 82.
  • blower means 8 can traverse along the apertures 30 as they are supported on the upper wall 23 of the tunnel 2 by a rack and pinion system 24.
  • the blower means 8 are made to traverse by a usual drive motor, not shown, to enable all the products present in the chambers C' and C" to be grazed by the drying flow.
  • the blower means 8 can be fixed, and be rotated about their axis through a predetermined angle by known means.
  • said perimetral rim 83 must be of frusto-conical shape, flared outwards, its opening angle being a function of the length of the tunnels 5 on which the products 6 are disposed.
  • the upper region B of the tunnel 2 forms the duct which enables the drying fluid to be controlled and directed from one chamber to the adjacent chamber.
  • This duct comprises a series of total-height vertical constricting baffles 10 disposed in positions corresponding with the underlying walls 4, to create an obligatory path for the drying fluid by which it is directed from the sides to the centre and vice versa alternately.
  • burners 12 are provided, one of which is visible in Figure 4, for heating the drying fluid before it is fed into the next chamber.
  • the burners 12 are positioned in the aperture bounded by said baffles 10 such that all the drying fluid passes through said burners before passing into the next chamber.
  • the drying fluid for example hot air, is fed, via the ports 130 of a conduit 13 and a delivery fan 14, only into those chambers C' and C" of the tunnel 2 dose to the doors 21 through which the dried products 6 are extracted from the tunnel 2, and is extracted from the tunnel 2 at the first chamber C' through which the products are fed into the tunnel.
  • the drying fluid is extracted by a suitable fan 15, as shown in Figure 1.
  • a damper device is interposed between the delivery ports 130 and the conduit 13, to limit the flow rate of the drying fluid to the chambers C' and C".
  • the drying fluid can conveniently be air heated to a temperature between 100°C and 180°C by usual heating means, not shown.
  • the trolleys 5, which are as tall as the lower region A of the tunnel 2, comprise a series of parallel shelves 50 on which the products 6 to be dried are located. Specifically, the products 6 are orientated, on each shelf 50, such that the axis of the holes with which they are provided is perpendicular to the advancement direction of the trolleys 5 within the tunnel 2, and in the same direction as the stream of drying fluid fed by said blower means 8.
  • Each trolley 5 also presents at its rear and/or front a plate 300 for closing the ports 40 of each chamber C' and C" to prevent, within the tunnel lower region A, air flows countercurrent to the direction of advancement of the material within the tunnel 2.
  • the drying fluid for example air heated to a temperature between 100°C and 180°C is fed, with reference to Figure 1, to those upper regions B corresponding to the six chambers C' and C" closest to the tunnel doors 21.
  • the fluid fed into that upper region B corresponding to the last tunnel chamber C' is directed by the four blower means 8 against the products 6, so that in passing through them it transfers heat to the products and absorbs a certain quantity of water in the form of steam.
  • the drying fluid then passes through the central aperture bounded by the baffles 10 to the upper region B corresponding to the next chamber C" where it is mixed with hot air fed by the conduit 13 and then redirected towards the products to be dried, by the three blower means 8 present in said chamber C".
  • the fluid passing from one chamber to the next transfers heat to the products and absorbs a quantity of water, to increase its water content and relative humidity, so that when the fluid finally grazes the products present in the initial tunnel chambers it has a relatively low temperature, generally between 40°C and 45°C, and a high relative humidity, close to 100%.
  • the drying effect of the fluid is less incisive and the quantity of water yielded by the material is less.
  • the invention uses the burners 12, which are positioned at those chambers C' close to the doors 20 through which the trolleys 5 enter the tunnel 2. Said burners 12 heat the drying fluid (air) to a temperature between 70°C and 75°C, without substantially changing its water content. In this manner the plant of the invention is able to remove from the material a water quantity between 40 and 50 g/m 3 of drying fluid fed into the tunnel, against the 20-25 g/m 3 of drying fluid in those plants of the known art.
  • the invention advantageously uses a smaller volume of drying fluid (air), so enabling a plant of smaller dimensions to be constructed, able to use drying fluid delivery fans and blower means less powerful than those used in plants of the known art, so resulting in considerable energy saving.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Claims (11)

  1. Installation de séchage continu de produits de briques creuses, comprenant un tunnel (2) possédant au moins une porte d'entrée (20) pour des chariots (5) portant les produits (6) à sécher, et au moins une porte de sortie (21) de ceux-ci, l'intérieur du tunnel (2) étant divisé en plusieurs chambres espacées (C' et C") dont l'une au moins est alimentée en un fluide de séchage et l'une au moins comporte un dispositif d'aspiration du fluide, les chambres communiquant mutuellement par une ouverture (40) par laquelle les chariots (5) peuvent avancer, chacun de ces derniers ayant une plaque (300) de fermeture de l'ouverture (40), les chambres (C' et C") étant raccordées mutuellement par un conduit qui est délimité par un faux-plafond (3) du tunnel (2), au moins un dispositif à ventilateur (8) disposé d'un premier côté des produits (6) et destiné à diriger le fluide de séchage sur eux étant raccordé au conduit et associé à chaque chambre (C' et C"), le fluide de séchage étant extrait successivement de l'une des chambres et étant transporté vers la chambre suivante par l'intermédiaire du conduit,
       le dispositif à ventilateur (8) étant dirigé en alternance, dans les chambres successives (C' et C"), d'un premier côté des produits dans l'une des chambres et du côté opposé dans la chambre suivante, et
       dans chaque chambre (C' et C"), au moins un orifice (30) est formé dans le faux-plafond (3) pour la communication entre chaque chambre (C' et C") et le conduit au-dessus du faux-plafond (3), l'orifice (30) ayant une position telle que, pendant le fonctionnement de l'installation, l'air a tendance à remonter par l'orifice (30) vers le conduit après être passé à travers les produits.
  2. Installation selon la revendication 1, caractérisée en ce qu'elle comprend deux rangées de chariots (5).
  3. Installation selon la revendication 1, caractérisée par le positionnement alterné des dispositifs à ventilateur (8) dans les chambres successives (C' et C") sur les côtés du tunnel (2) et au centre du tunnel (2).
  4. Installation selon la revendication 1, caractérisée en ce que le conduit comprend des déflecteurs (10) de rétrécissement placés au niveau des murs (4) qui séparent les chambres (C' et C") les unes des autres.
  5. Installation selon la revendication 4, caractérisée en ce que les déflecteurs de rétrécissement (10) sont disposés sur les côtés et au centre du conduit.
  6. Installation selon la revendication 1, caractérisée en ce que les dispositifs à ventilateur (8) peuvent traverser dans chaque chambre (C' et C").
  7. Installation selon la revendication 1, caractérisée en ce que les dispositifs à ventilateur (8) sont fixés à l'intérieur de chaque chambre (C' et C") et peuvent tourner autour de leur axe d'un angle prédéterminé.
  8. Installation selon la revendication 1, caractérisée en ce qu'un dispositif de chauffage au moins (12) du fluide de séchage est associé aux chambres (C' et C") qui sont proches de la porte d'entrée au moins (20).
  9. Installation selon la revendication 8, caractérisée en ce que le dispositif de chauffage au moins (12) est disposé dans le conduit.
  10. Installation selon la revendication 8, caractérisée en ce que le dispositif de chauffage au moins (12) est un brûleur.
  11. Installation selon la revendication 1, caractérisée en ce que le fluide de séchage est l'air chaud.
EP01202259A 2000-06-23 2001-06-12 Installation pour le séchage continu de produits en brique Expired - Lifetime EP1167907B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE000070 2000-06-23
IT2000RE000070A IT1318348B1 (it) 2000-06-23 2000-06-23 Impianto per l'essiccazione continua di prodotti laterizi.

Publications (2)

Publication Number Publication Date
EP1167907A1 EP1167907A1 (fr) 2002-01-02
EP1167907B1 true EP1167907B1 (fr) 2005-08-10

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Family Applications (1)

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EP01202259A Expired - Lifetime EP1167907B1 (fr) 2000-06-23 2001-06-12 Installation pour le séchage continu de produits en brique

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Country Link
EP (1) EP1167907B1 (fr)
AT (1) ATE301812T1 (fr)
DE (1) DE60112517D1 (fr)
IT (1) IT1318348B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2828652C1 (ru) * 2024-04-26 2024-10-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный аграрный университет имени В.Я. Горина" Установка для сушки пророщенного зерна

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102778115B (zh) * 2012-08-26 2015-09-09 西安墙体材料研究设计院 一种框排架结构的烧结类墙体材料坯体干燥室
CN105486073B (zh) * 2016-01-25 2017-06-16 吉林大学 一种湿热控速薄层横流干燥试验台
CN112361799A (zh) * 2020-12-09 2021-02-12 石河子大学 一种小车隧道分段式空气能热泵干燥机

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1268535A (en) * 1916-08-05 1918-06-04 Bernard Russell Andrews Apparatus for drying material.
DE362729C (de) * 1921-04-26 1922-10-31 Pilade Barducci Belueftungsverfahren in Trockenkammern
GB330447A (en) * 1929-07-29 1930-06-12 William James Gardner Improvements in or relating to the drying of refractory materials
US2422536A (en) * 1943-01-11 1947-06-17 William J Finnegan Apparatus for treatment of foods by dehydration or refrigeration comprising trucks and a treating inclosure
CH316232A (de) * 1953-06-06 1956-09-30 Robert Aebi & Cie Ag Verfahren zum Trocknen von Gut in einem Tunneltrockner mit Querbelüftung für die keramische Industrie
US2928158A (en) * 1956-01-09 1960-03-15 Boyd C Miller Apparatus for and method of heattreating articles
DE1159855B (de) * 1959-11-05 1963-12-19 Benno Schilde Maschb A G Trocknerumluftkanal mit schwenkbarem Axialluefter
DE3716934C1 (en) * 1987-05-20 1988-10-27 Wagner Max Novokeram Drying chamber
DE3938682A1 (de) * 1989-11-22 1991-05-23 Wagner Max Novokeram Verfahren und vorrichtung zum trocknen von guetern
DE4219465C1 (fr) * 1992-06-13 1993-07-22 Novokeram Max Wagner Gmbh, 8908 Krumbach, De
CH684365A5 (it) * 1992-08-12 1994-08-31 Bridgelane Ltd Procedimento per l'essiccazione di blocchi forati in laterizio ed impianti per la realizzazione del procedimento.
FR2731782B1 (fr) * 1995-03-14 1997-05-30 Ceric Sechoir pour produits en terre cuite
EP0877220A3 (fr) * 1997-05-06 2000-12-20 Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG Dispositif et procédé de séchage de corps céramiques moulés

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2828652C1 (ru) * 2024-04-26 2024-10-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный аграрный университет имени В.Я. Горина" Установка для сушки пророщенного зерна

Also Published As

Publication number Publication date
IT1318348B1 (it) 2003-08-25
EP1167907A1 (fr) 2002-01-02
DE60112517D1 (de) 2005-09-15
ATE301812T1 (de) 2005-08-15
ITRE20000070A1 (it) 2001-12-23

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