EP2038598A2 - Hot gas generator and drying or dehydratiion installation employing such a generator - Google Patents

Hot gas generator and drying or dehydratiion installation employing such a generator

Info

Publication number
EP2038598A2
EP2038598A2 EP07788897A EP07788897A EP2038598A2 EP 2038598 A2 EP2038598 A2 EP 2038598A2 EP 07788897 A EP07788897 A EP 07788897A EP 07788897 A EP07788897 A EP 07788897A EP 2038598 A2 EP2038598 A2 EP 2038598A2
Authority
EP
European Patent Office
Prior art keywords
hot gas
chamber
hot
gas generator
generator according
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.)
Granted
Application number
EP07788897A
Other languages
German (de)
French (fr)
Other versions
EP2038598B1 (en
Inventor
Patrick Delaine
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.)
Nexter Munitions SA
Original Assignee
Nexter Munitions SA
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 Nexter Munitions SA filed Critical Nexter Munitions SA
Priority to PL07788897T priority Critical patent/PL2038598T3/en
Publication of EP2038598A2 publication Critical patent/EP2038598A2/en
Application granted granted Critical
Publication of EP2038598B1 publication Critical patent/EP2038598B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • 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
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger

Definitions

  • the technical field of the invention is that of hot gas generators, including generators for equipping the dewatering or drying units of materials.
  • This device uses the combustion gases directly. But these include residues that impregnate in a more or less strong way the dried material and limit the subsequent uses of this material.
  • the invention aims to provide a hot gas generator to overcome such drawbacks.
  • the generator according to the invention thus makes it possible to generate a stream of hot gas whose chemical characteristics can be completely controlled.
  • the generator according to the invention also makes it possible to control the temperature of the gas generated while ensuring the recovery of the thermal energy of the burner or the hearth with excellent efficiency.
  • the generator according to the invention can implement burners or foci of various technologies using all types of fuels. It ensures in all cases the generation of a hot and clean gas does not disrupt the drying process or dehydration.
  • the subject of the invention is a hot gas generator, in particular for a dehydration or drying unit, a generator comprising a burner or a hearth and characterized in that it comprises at least one exchange circuit comprising at least one tubing in which circulates the gas to be heated, tubing having a fresh gas inlet end and a hot gas discharge outlet, tubing having a heat exchange surface between the combustion gases generated by the burner or furnace and the gas to be heated circulating in the tubing, the tubing also ensuring a physical separation between the heated gases and the combustion gases generated by the burner or hearth.
  • the pipe or pipes of the exchange circuits will preferably be oriented so that the flow of heated gas flows in the tubing in a direction opposite to that of the flow of combustion gases from the burner or hearth.
  • the hot gas generator may comprise means for regulating the speed of the hot gases leaving the various pipes.
  • Each exchange circuit may furthermore comprise an outlet collecting channel and at least one intake channel, the outlet manifold and the inlet channel being connected to each other by means of tubes that are substantially parallel to each other. other.
  • the intake channels and the outlet manifold may be substantially annular.
  • the hot gas generator may comprise at least one set of tubes having a corrugated profile.
  • It may also include a hot gas collecting duct, conduit which will be connected to the outlet manifold by tubes. It may also include a fresh gas supply duct which will be connected to the various intake channels by tubes.
  • the means for regulating the speed of the hot gases will be constituted by valves interposed between the fresh gas supply duct and each tube connecting this duct to the different intake ducts.
  • the intake channels will be advantageously compartmentalized in different sectors, each sector being connected to a single valve.
  • the hot gas generator may comprise at least two exchange circuits, each exchange circuit being disposed in a chamber through which the combustion gases circulate.
  • the two chambers may be concentric, the passage of the combustion gases from one chamber to the other being effected at a first end of a first chamber, the flow direction of the combustion gases being in the second chamber the opposite of the one in the first room.
  • the fresh gas supply duct may be arranged coaxially with the first chamber and inside a flue gas discharge chimney.
  • the burner or fireplace may also be disposed at a second end of the first chamber.
  • the hot gas generator may comprise a third chamber surrounding the second chamber, the third chamber which will contain tubings connecting the exchange circuit of the second chamber to the fresh gas supply duct.
  • the invention also relates to a dehydration or drying installation using such a hot gas generator.
  • This dehydration or drying plant may be such that the fresh gas supply duct to the hot gas generator will be connected to a hot air recovery circuit that will be extracted from an enclosure receiving the material or materials to be dehydrated .
  • the hot air recovery circuit may incorporate at least one condenser to dehydrate the air.
  • the dehydration or drying plant may include an activation circuit of the burner or fireplace using a portion of the hot air from the condenser.
  • It may also comprise a mixer disposed upstream of the chamber and for mixing the hot air from the generator with a fresh air portion out of the condenser.
  • FIG. 1 is a diagrammatic representation of an installation for drying organic material a hot gas generator according to the invention
  • FIG. 2 is an external perspective view of the generator according to one embodiment of the invention
  • FIG. 3 is another external perspective view of the generator, the vessel envelope being partially cut off
  • FIG. 4 is another external perspective view of the generator cut along a longitudinal plane;
  • FIG. 5 is a longitudinal sectional view of the generator assembly;
  • FIG. 6 is a view similar to FIG. 5, but in which some of the tubes have been removed to show more precisely the main circuits and the directions of circulation of the fluids,
  • FIG. 7a is an enlarged sectional view of one of the valves used in the generator according to the invention.
  • FIG. 7b is an exploded perspective view of this valve
  • FIG. 8 shows a dehydration plant implementing the generator according to the invention.
  • Figure 1 shows an installation 1 for drying organic material 2.
  • the materials 2 for example agricultural waste or breadmaking
  • the materials may be carried by a drive means (not shown) such as a treadmill or a worm. This drive means will allow the loading and unloading of the oven 3.
  • the oven 3 is connected to a cyclone 4 which is intended to ensure the separation of solids from the gas stream flowing in the oven 3.
  • the dried or dehydrated solids are removed periodically or continuously (according to the method) by the conduits 5 and 6.
  • the drying is ensured by a hot gas stream G which circulates in the oven 3 and which is led by a pipe 7 which leaves a hot gas generator 8.
  • the generator 8 is shown schematically in the form of an exchanger. It comprises a burner or a hearth 9 (for example a gas burner or a furnace fed by biomass) and an exchange circuit 10 comprising at least one pipe in which the gas to be heated circulates.
  • the hot gas is here air.
  • the tubing of the exchange circuit 10 has a fresh air inlet end 11 and a hot air discharge outlet 12.
  • the intake end 11 is connected to a condenser 13 which receives via the pipe 15 the hot air leaving the upper part of the cyclone 4.
  • This condenser is cooled by fresh air circulating in an exchange circuit and entering this circuit through the inlet pipe 14.
  • the condenser 13 ensures dehydration hot air flowing in the pipe 15 and preheating the previously dehydrated ambient air and conducted through the pipe 14.
  • the preheated air is led to the intake end 11 of the exchange circuit 10 via a duct 22.
  • the liquid water (H20) is recovered at the bottom 16 of the condenser 13.
  • An accelerator (such as a pump or extractor) 17 is disposed at a stack 19 exhaust gas and accelerates and regulates the flow of hot air G flowing in the oven 3.
  • some of the residual hot air is also used to activate the burner or the firebox 9. This hot air is led to the burner via the pipe 20 on which an accelerator 18 is installed.
  • the combustion gases from the burner or the hearth 9 are discharged through a chimney 21.
  • the tubing of the exchange circuit 10 has a surface to ensure a good heat exchange between the combustion gases generated by the burner or the hearth 9 and the gas to be heated (here air) brought by the conduit 22.
  • the tubing of the exchange circuit 10 makes it possible moreover to ensure a physical separation between the heated gases and the combustion gases generated by the burner 9.
  • Figures 2 to 5 show an embodiment of a hot gas generator according to the invention.
  • FIG. 2 shows an external view of this generator 8. It can be seen that it comprises a substantially cylindrical tank 23. This tank will be arranged vertically (as shown in the figure) in the case of a biomass fireplace and it will be arranged horizontally in the case of a liquid or gaseous fuel burner. The lower part of the tank carries the burner or the hearth 9, the upper part carries the chimney 21 for evacuation of the combustion gases from the burner or the hearth 9. This gas supply duct 22 is also seen in this figure. fresh. This duct radially crosses the chimney 21 and (as is more particularly visible in Figures 3 to 5) it has an end which is disposed coaxially with the vessel 23 and inside the chimney 21 for discharging the combustion gases.
  • FIG. 2 shows the pipe 7 which discharges the hot gases out of the generator 8.
  • the internal structure of the generator 8 is more particularly visible in FIGS. 3 to 5.
  • the tank 23 of the generator surrounds a number of tubings which are organized in different exchange circuits.
  • the generator shown here has two concentric exchange circuits.
  • Each exchange circuit is arranged in a specific chamber through which the combustion gases from the burner flow.
  • the generator thus comprises a first cylindrical chamber 24 surrounding the axis of the generator and which is delimited by a first cylindrical partition 26 carried by a support 27 integral with the bottom of the tank 23 (FIG. 5).
  • the generator 8 also comprises a second annular chamber 25, surrounding the first chamber 24 and which is delimited on the one hand by the first partition 26 and on the other by a second partition 28, concentric with the first partition 26.
  • the second partition 28 is secured to a plate 29 which is fixed at an upper end of the tank 23 and on which is fixed a housing 30 carrying the chimney 21.
  • the combustion gases C originating from the burner or the hearth 9 firstly pass through the first chamber 24 in the direction indicated by the arrows C (vertically from bottom to top, ie from the burner or fireplace 9 to the chimney 21). The gases are stopped by the upper partition plate 29 and then flow into the second chamber 25 in the reverse direction, vertically and from top to bottom.
  • the flow direction of the combustion gases in the third chamber 31 is also the opposite of that which it has in the second chamber 25.
  • the fresh gas is supplied to the generator at the duct 22 which is arranged coaxially with the various chambers 24, 25, 31 and inside the chimney 21 for evacuating the combustion gases.
  • the fresh gas is introduced into the generator 8 in a direction D which is the opposite of that of the flow C of the combustion gases from the burner or the hearth. This opposite direction is respected in the first chamber 24. It is also respected in the second chamber 25 (as well as in the third chamber 31).
  • each exchange circuit arranged in a chamber is designed to optimize heat transfer.
  • Each exchange circuit thus comprises a single outlet collection channel for the hot gases and several intake channels.
  • the outlet manifold and the inlet channels are connected to each other by pipes substantially parallel to each other.
  • the first exchange circuit (located in the first chamber 24) therefore comprises an annular outlet manifold 34.1 which is arranged in the vicinity of the burner or the hearth 9.
  • the first exchange circuit also has four intake channels 35a1, 35b1, 35c1 and 35d1 (FIG. 6). These channels are all annular except the channel 35al which is in fact a box disposed substantially at the axis of the generator.
  • the diameters of the channels 35b1, 35c1 and 35d1 are also different from each other.
  • outlet manifold 34.1 and the inlet channels 35a1, 35b1, 35c1 and 35d1 are connected to each other by manifolds 36 substantially parallel to each other.
  • the hot gas generator according to the invention also comprises a toroidal conduit 37 for collecting the hot gases supplied by the different exchange circuits.
  • the duct 37 carries the pipe 7 for discharging the hot gases generated by the generator.
  • the duct 37 is connected by tubings (38.1, 38.2) to the outlet manifolds (34.1, 34.2) of the different exchange circuits.
  • the manifold 34.1 of the first exchange circuit is connected to the conduit 37 by tubing 38.1 rectangular section. See in particular Figures 4 and 5.
  • the second exchange circuit (that which is arranged in the second chamber 25) has a structure similar to that of the first exchange circuit.
  • This second exchange circuit comprises four intake channels 35a2, 35b2, 35c2 and 35d2. These channels are all annular and disposed at the lower end of the second chamber 25.
  • the fresh gas is fed from the duct 22 to the various intake ducts 35a2, 35b2, 35c2, 35d2 by tubing 33 with a rectangular section (see FIG. 3).
  • Tubing 36 with a straight or corrugated profile connects the inlet channels and the outlet manifold 34.2.
  • the latter is itself connected to the duct 37 for discharging hot gases by tubing 38.2 with a rectangular section. See in particular Figures 3, 5 and 6.
  • the generator according to the invention therefore provides in a relatively compact volume an excellent thermal efficiency.
  • a generator 8 generating a flow having a speed between 5.0 m / s and 8.0 m / s of hot gas having a temperature of about 600 0 C .
  • the skilled person will easily size the generator according to the desired characteristics (temperature and flow).
  • the different shapes and lengths for the pipes 36 (within the same exchange circuit and between the different exchange circuits) lead to different head losses at each tubing.
  • means will be provided for regulating the speed of the hot gases leaving the various pipes.
  • These means are for example constituted by valves which will be interposed between the duct 22 for supplying fresh gas and each tube which connects this duct to the various inlet channels 35 (35a1,..., 35d1... 35a2,. .., 35d2).
  • a plunger 41 having a conical end 42 which is intended to cooperate with a complementary bearing surface of a support 43.
  • the support 43 is screwed to a base 44.
  • a spring 45 is dimensioned solely to withstand the weight of the plunger 41. last is therefore supported on its range in the rest position of the valve (as shown in Figure 7a).
  • the direction of passage of the fresh gas is represented by the arrows D.
  • the fresh gas from the conduit 22 enters the valve 40 through the orifice 46. It pushes the plunger 41 against the action of the spring 45. The fresh gas passes into the chamber 47 and spring downstream through the bore 48 to go to the inlet channel 35 considered.
  • the gas passage section will vary as a function of the axial position of the plunger 41. An increase in the pressure of the hot gas downstream will therefore push the plunger upwards and reduce the fresh gas inlet pressure.
  • the valve thus makes it possible to regulate the hot gas pressure and thus regulates the speed of the air in the various pipes.
  • characteristics of the valve will of course be different.
  • the different valves will be dimensioned according to the desired result, which is to obtain the same hot gas outlet velocity for all the pipes at the exhaust duct 37.
  • the skilled person will easily size these different valves according to the characteristics of the generator that he realizes.
  • the hot gas generator according to the invention can be implemented in different installations.
  • Figure 8 thus shows a dehydration plant, for example for timber.
  • This installation 1 comprises a closed enclosure 50 inside which are disposed the elements 58 of timber to be dried, placed for example on a carriage.
  • the generator 8 supplies hot air through its gas evacuation pipe 7 and receives fresh air through its conduit 22.
  • the pipe 7 is connected to the enclosure 50 via a pipe 52.
  • the hot air After circulation in the enclosure 50, the hot air is discharged through an outlet pipe 53 which is connected to a condenser 13.
  • This condenser is cooled by fresh outside air circulating in an exchange circuit and entering this circuit through the inlet manifold 14.
  • the condenser 13 makes it possible to ensure the dehydration of the hot air flowing in the pipe 53.
  • the air thus dehydrated is fed to the intake duct 22 of the generator 8 via the pipe 59.
  • the liquid water (H20) is recovered at the bottom 16 of the condenser 13.
  • An accelerator (such as a pump) 17 allows accelerate and regulate the flow of hot air G flowing in the enclosure 50 and in the generator 8.
  • the duct bringing the fresh air 22 to the generator 8 is connected to a hot air recovery circuit which is extracted from the enclosure 50 receiving the materials to be dehydrated.
  • Part of the hot air recovered in the condenser 13 is used to activate the burner or the hearth 9, via the duct 57.
  • This duct is connected to the duct 22 by means of a three-way valve 51 whose function is to enable the extraction of a quantity of preheated air to supplement the losses possibly caused by leaks.
  • Another three-way valve 54 is interposed between an upstream portion (duct 57), a downstream portion 60 (towards the burner) and an exhaust 61. It allows the regulation of the preheated air flow necessary for the activation of the burner or the home
  • a mixer 55 is disposed at the inlet of the enclosure 50. It is possible at this mixer to dose the hot air from the generator 8 with a portion of the fresh air leaving the condenser 13 by means of a shutter 56.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Solid Materials (AREA)
  • Detergent Compositions (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The subject of the invention is a hot gas generator (8), particularly for a dehydration or drying unit, the generator comprising a burner or hearth (9) and being characterized in that it comprises at least one exchange circuit (10) comprising at least one pipe through which the gas to be heated flows, the pipe comprising a cool gas inlet end (11) and a hot gas discharge outlet (12), the pipe having a surface for heat exchange between the combustion gases generated by the burner or hearth (9) and the gas to be heated which flows through the pipe, the pipe also providing a physical barrier between the heated gases and the combustion gases generated by the burner or hearth. Application to producing a drying or dehydration installation.

Description

GENERATEUR DE GAZ CHAUD ET INSTALLATION DE SECHAGE OU DESHYDRATATION METTANT EN ŒUVRE UN TEL GENERATEURHOT GAS GENERATOR AND DRYING OR DEHYDRATION INSTALLATION USING SUCH A GENERATOR
Le domaine technique de l'invention est celui des générateurs de gaz chaud, notamment des générateurs destinés à équiper les unités de déshydratation ou de séchage de matériaux.The technical field of the invention is that of hot gas generators, including generators for equipping the dewatering or drying units of materials.
Il est connu (par exemple de EP0049677) de réaliser une unité de séchage de déchets ligneux comportant un moyen de séchage alimenté par les gaz de combustion fournis par une chaudière .It is known (for example from EP0049677) to produce a wood waste drying unit comprising a drying means fed by the combustion gases supplied by a boiler.
Ce dispositif utilise directement les gaz de combustion. Or ces derniers comportent des résidus qui imprègnent d'une façon plus ou moins forte le matériau séché et limitent les utilisations ultérieures de ce matériau.This device uses the combustion gases directly. But these include residues that impregnate in a more or less strong way the dried material and limit the subsequent uses of this material.
Il n'est ainsi pas possible de mettre en œuvre une telle unité de séchage pour déshydrater des matériaux comestibles et devant être ultérieurement consommés (par exemple par les animaux) . Même pour le séchage ou la déshydratation de matériaux ligneux, les résidus de combustion imprègnent le bois ce qui nuit à son aspect externe. Les résidus de combustion peuvent par la suite exsuder hors du bois conduisant à des pollutions des habitations. Les résidus de combustion peuvent également gêner la transformation ultérieure du bois (par exemple pour l'ameublement) en modifiant les caractéristiques mécaniques de celui ci .It is thus not possible to implement such a drying unit to dehydrate edible materials and to be subsequently consumed (for example by animals). Even for the drying or the dehydration of ligneous materials, the residues of combustion impregnate the wood which affects its external aspect. The residues of combustion can subsequently exude out of the wood leading to pollutions of the houses. The combustion residues can also hinder the further processing of the wood (for example for furniture) by modifying the mechanical characteristics of the latter.
L'invention a pour but de proposer un générateur de gaz chaud permettant de pallier de tels inconvénients. Le générateur selon l'invention permet ainsi d'engendrer un courant de gaz chaud dont les caractéristiques chimiques peuvent être complètement maîtrisées.The invention aims to provide a hot gas generator to overcome such drawbacks. The generator according to the invention thus makes it possible to generate a stream of hot gas whose chemical characteristics can be completely controlled.
Par ailleurs, le générateur selon l'invention permet également de maîtriser la température du gaz engendré tout en assurant la récupération de l'énergie thermique du brûleur ou du foyer avec un excellent rendement.Moreover, the generator according to the invention also makes it possible to control the temperature of the gas generated while ensuring the recovery of the thermal energy of the burner or the hearth with excellent efficiency.
Le générateur selon l'invention peut mettre en œuvre des brûleurs ou des foyers de technologies diverses utilisant tous types de combustibles. Il assure dans tous les cas la génération d'un gaz chaud et propre ne perturbant pas le processus de séchage ou de déshydratation.The generator according to the invention can implement burners or foci of various technologies using all types of fuels. It ensures in all cases the generation of a hot and clean gas does not disrupt the drying process or dehydration.
Ainsi, l'invention a pour objet un générateur de gaz chaud, notamment pour une unité de déshydratation ou de séchage, générateur comportant un brûleur ou un foyer et caractérisé en ce qu'il comporte au moins un circuit d'échange comportant au moins une tubulure dans laquelle circule le gaz à chauffer, tubulure comportant une extrémité d'admission en gaz frais et une sortie d'évacuation en gaz chaud, tubulure présentant une surface d'échange thermique entre les gaz de combustion engendrés par le brûleur ou foyer et le gaz à chauffer circulant dans la tubulure, la tubulure assurant par ailleurs une séparation physique entre les gaz chauffés et les gaz de combustion engendrés par le brûleur ou foyer .Thus, the subject of the invention is a hot gas generator, in particular for a dehydration or drying unit, a generator comprising a burner or a hearth and characterized in that it comprises at least one exchange circuit comprising at least one tubing in which circulates the gas to be heated, tubing having a fresh gas inlet end and a hot gas discharge outlet, tubing having a heat exchange surface between the combustion gases generated by the burner or furnace and the gas to be heated circulating in the tubing, the tubing also ensuring a physical separation between the heated gases and the combustion gases generated by the burner or hearth.
La ou les tubulures des circuits d'échange seront de préférence orientées de telle sorte que le flux de gaz chauffé circule dans la tubulure suivant une direction inverse de celle du flux des gaz de combustion issus du brûleur ou foyer.The pipe or pipes of the exchange circuits will preferably be oriented so that the flow of heated gas flows in the tubing in a direction opposite to that of the flow of combustion gases from the burner or hearth.
Le générateur de gaz chaud pourra comporter des moyens permettant de réguler la vitesse des gaz chauds sortant des différentes tubulures. Chaque circuit d'échange pourra par ailleurs comporter un canal collecteur de sortie et au moins un canal d'admission, le collecteur de sortie et le canal d'admission étant reliés l'un à l'autre par des tubulures sensiblement parallèles les unes aux autres. Les canaux d'admission et le collecteur de sortie pourront être sensiblement annulaires.The hot gas generator may comprise means for regulating the speed of the hot gases leaving the various pipes. Each exchange circuit may furthermore comprise an outlet collecting channel and at least one intake channel, the outlet manifold and the inlet channel being connected to each other by means of tubes that are substantially parallel to each other. other. The intake channels and the outlet manifold may be substantially annular.
Le générateur de gaz chaud pourra comporter au moins un jeu de tubulures ayant un profil ondulé.The hot gas generator may comprise at least one set of tubes having a corrugated profile.
Il pourra aussi comprendre un conduit torique de collecte des gaz chauds, conduit qui sera relié au collecteur de sortie par des tubes. II pourra par ailleurs comprendre un conduit d'amenée de gaz frais qui sera raccordé aux différents canaux d'admission par des tubes.It may also include a hot gas collecting duct, conduit which will be connected to the outlet manifold by tubes. It may also include a fresh gas supply duct which will be connected to the various intake channels by tubes.
Selon un mode particulier de réalisation, les moyens permettant de réguler la vitesse des gaz chauds seront constitués par des clapets interposés entre le conduit d'amenée de gaz frais et chaque tube reliant ce conduit aux différents canaux d'admission.According to a particular embodiment, the means for regulating the speed of the hot gases will be constituted by valves interposed between the fresh gas supply duct and each tube connecting this duct to the different intake ducts.
Les canaux d'admission seront avantageusement compartimentés en différents secteurs, chaque secteur étant relié à un clapet unique.The intake channels will be advantageously compartmentalized in different sectors, each sector being connected to a single valve.
Le générateur de gaz chaud pourra comporter au moins deux circuits d'échange, chaque circuit d'échange étant disposé dans une chambre au travers de laquelle circulent les gaz de combustion.The hot gas generator may comprise at least two exchange circuits, each exchange circuit being disposed in a chamber through which the combustion gases circulate.
Les deux chambres pourront être concentriques, le passage des gaz de combustion d'une chambre à l'autre s 'effectuant au niveau d'une première extrémité d'une première chambre, le sens de circulation des gaz de combustion étant dans la deuxième chambre l'inverse de celui qu'il y a dans la première chambre.The two chambers may be concentric, the passage of the combustion gases from one chamber to the other being effected at a first end of a first chamber, the flow direction of the combustion gases being in the second chamber the opposite of the one in the first room.
Le conduit d'amenée de gaz frais pourra être disposé coaxialement à la première chambre et à l'intérieur d'une cheminée d'évacuation des gaz de combustion. Le brûleur ou foyer pourra par ailleurs être disposé au niveau d'une deuxième extrémité de la première chambre.The fresh gas supply duct may be arranged coaxially with the first chamber and inside a flue gas discharge chimney. The burner or fireplace may also be disposed at a second end of the first chamber.
Le générateur de gaz chaud pourra comporter une troisième chambre entourant la deuxième chambre, troisième chambre qui renfermera des tubulures raccordant le circuit d'échange de la deuxième chambre au conduit d'amenée de gaz frais.The hot gas generator may comprise a third chamber surrounding the second chamber, the third chamber which will contain tubings connecting the exchange circuit of the second chamber to the fresh gas supply duct.
L'invention a également pour objet une installation de déshydratation ou de séchage mettant en œuvre un tel générateur de gaz chaud.The invention also relates to a dehydration or drying installation using such a hot gas generator.
Cette installation de déshydratation ou de séchage pourra être telle que le conduit d'amenée de gaz frais au générateur de gaz chaud sera relié à un circuit de récupération de l'air chaud qui sera extrait d'une enceinte recevant le ou les matériaux à déshydrater. Le circuit de récupération de l'air chaud pourra incorporer au moins un condenseur assurant la déshydratation de 1 ' air .This dehydration or drying plant may be such that the fresh gas supply duct to the hot gas generator will be connected to a hot air recovery circuit that will be extracted from an enclosure receiving the material or materials to be dehydrated . The hot air recovery circuit may incorporate at least one condenser to dehydrate the air.
L'installation de déshydratation ou de séchage pourra comprendre un circuit d'activation du brûleur ou foyer utilisant une partie de l'air chaud issu du condenseur.The dehydration or drying plant may include an activation circuit of the burner or fireplace using a portion of the hot air from the condenser.
Elle pourra par ailleurs comprendre un mélangeur disposé en amont de l'enceinte et permettant de mélanger l'air chaud issu du générateur avec une partie d'air frais sorti du condenseur.It may also comprise a mixer disposed upstream of the chamber and for mixing the hot air from the generator with a fresh air portion out of the condenser.
L'invention sera mieux comprise à la lecture de la description qui va suivre de différents modes de réalisation, description faite en référence aux dessins annexés et dans lesquels : - la figure 1 représente d'une façon schématique une installation de séchage de matière organique mettant en œuvre un générateur de gaz chaud selon l'invention,The invention will be better understood on reading the following description of various embodiments, a description given with reference to the accompanying drawings and in which: FIG. 1 is a diagrammatic representation of an installation for drying organic material a hot gas generator according to the invention,
- la figure 2 est une vue en perspective externe du générateur selon un mode de réalisation de l'invention, - la figure 3 est une autre vue en perspective externe du générateur, l'enveloppe de la cuve étant partiellement coupée,FIG. 2 is an external perspective view of the generator according to one embodiment of the invention; FIG. 3 is another external perspective view of the generator, the vessel envelope being partially cut off,
- la figure 4 est une autre vue en perspective externe du générateur coupé suivant un plan longitudinal, - la figure 5 est une vue en coupe longitudinale de l'ensemble du générateur,FIG. 4 is another external perspective view of the generator cut along a longitudinal plane; FIG. 5 is a longitudinal sectional view of the generator assembly;
- la figure 6 est une vue analogue à la figure 5, mais dans laquelle certains des tubes ont été retirés pour montrer plus précisément les principaux circuits et les sens de circulation des fluides,FIG. 6 is a view similar to FIG. 5, but in which some of the tubes have been removed to show more precisely the main circuits and the directions of circulation of the fluids,
- la figure 7a est une vue en coupe agrandie d'un des clapets mis en oeuvre dans le générateur selon l'invention,FIG. 7a is an enlarged sectional view of one of the valves used in the generator according to the invention,
- la figure 7b est une vue en perspective éclatée de ce clapet, - la figure 8 montre une installation de déshydratation mettant en œuvre le générateur selon l'invention.FIG. 7b is an exploded perspective view of this valve; FIG. 8 shows a dehydration plant implementing the generator according to the invention.
La figure 1 montre une installation 1 permettant le séchage de matières organiques 2. Les matières 2 (par exemple des déchets agricoles ou de panification) sont disposées dans un four 3. Les matières pourront être portées par un moyen d'entraînement (non représenté) tel un tapis roulant ou une vis sans fin. Ce moyen d'entraînement permettra le chargement et le déchargement du four 3.Figure 1 shows an installation 1 for drying organic material 2. The materials 2 (for example agricultural waste or breadmaking) are arranged in a furnace 3. The materials may be carried by a drive means (not shown) such as a treadmill or a worm. This drive means will allow the loading and unloading of the oven 3.
Le four 3 est relié à un cyclone 4 qui a pour but d'assurer la séparation des matières solides du courant gazeux circulant dans le four 3. Les matières solides séchées ou déshydratées sont évacuées de façon périodique ou continue (selon le procédé) par les conduites 5 et 6.The oven 3 is connected to a cyclone 4 which is intended to ensure the separation of solids from the gas stream flowing in the oven 3. The dried or dehydrated solids are removed periodically or continuously (according to the method) by the conduits 5 and 6.
Le séchage est assuré grâce à un courant gazeux chaud G qui circule dans le four 3 et qui est conduit par une canalisation 7 qui sort d'un générateur de gaz chaud 8.The drying is ensured by a hot gas stream G which circulates in the oven 3 and which is led by a pipe 7 which leaves a hot gas generator 8.
Le générateur 8 est représenté ici de façon schématique sous la forme d'un échangeur. Il comporte un brûleur ou un foyer 9 (par exemple un brûleur à gaz ou un foyer alimenté par de la biomasse) et un circuit d'échange 10 comportant au moins une tubulure dans laquelle circule le gaz à chauffer. Le gaz chaud est ici de l'air.The generator 8 is shown schematically in the form of an exchanger. It comprises a burner or a hearth 9 (for example a gas burner or a furnace fed by biomass) and an exchange circuit 10 comprising at least one pipe in which the gas to be heated circulates. The hot gas is here air.
La tubulure du circuit d'échange 10 comporte une extrémité d'admission en air frais 11 et une sortie d'évacuation en air chaud 12. L'extrémité d'admission 11 est reliée à un condenseur 13 qui reçoit par la conduite 15 l'air chaud sortant par la partie supérieure du cyclone 4. Ce condenseur est refroidi par de l'air frais circulant dans un circuit d'échange et entrant dans ce circuit par la tubulure d'entrée 14. Le condenseur 13 permet d'assurer la déshydratation de l'air chaud circulant dans la conduite 15 et de préchauffer l'air ambiant précédemment déshydraté et conduit par la tubulure 14.The tubing of the exchange circuit 10 has a fresh air inlet end 11 and a hot air discharge outlet 12. The intake end 11 is connected to a condenser 13 which receives via the pipe 15 the hot air leaving the upper part of the cyclone 4. This condenser is cooled by fresh air circulating in an exchange circuit and entering this circuit through the inlet pipe 14. The condenser 13 ensures dehydration hot air flowing in the pipe 15 and preheating the previously dehydrated ambient air and conducted through the pipe 14.
L'air ainsi préchauffé est conduit à l'extrémité d'admission 11 du circuit d'échange 10 par un conduit 22.The preheated air is led to the intake end 11 of the exchange circuit 10 via a duct 22.
L'eau liquide (H20) est récupérée au niveau du fond 16 du condenseur 13. Un accélérateur (tel une pompe ou un extracteur) 17 est disposé au niveau d'une cheminée 19 d'évacuation des gaz et permet d'accélérer et de réguler le flux d'air chaud G circulant dans le four 3.The liquid water (H20) is recovered at the bottom 16 of the condenser 13. An accelerator (such as a pump or extractor) 17 is disposed at a stack 19 exhaust gas and accelerates and regulates the flow of hot air G flowing in the oven 3.
Par ailleurs une partie de l'air chaud résiduel est également utilisée pour activer le brûleur ou le foyer 9. Cet air chaud est conduit au brûleur par la conduite 20 sur laquelle est installé un accélérateur 18.Furthermore, some of the residual hot air is also used to activate the burner or the firebox 9. This hot air is led to the burner via the pipe 20 on which an accelerator 18 is installed.
Les gaz de combustion issus du brûleur ou du foyer 9 sont évacués par une cheminée 21.The combustion gases from the burner or the hearth 9 are discharged through a chimney 21.
Conformément à l'invention la tubulure du circuit d'échange 10 présente une surface permettant d'assurer un bon échange thermique entre les gaz de combustion engendrés par le brûleur ou le foyer 9 et le gaz à chauffer (ici de l'air) amené par le conduit 22.According to the invention the tubing of the exchange circuit 10 has a surface to ensure a good heat exchange between the combustion gases generated by the burner or the hearth 9 and the gas to be heated (here air) brought by the conduit 22.
La tubulure du circuit d'échange 10 permet d'assurer par ailleurs une séparation physique entre les gaz chauffés et les gaz de combustion engendrés par le brûleur 9.The tubing of the exchange circuit 10 makes it possible moreover to ensure a physical separation between the heated gases and the combustion gases generated by the burner 9.
Ainsi le flux G de gaz chaud est parfaitement propre et ne dégrade pas la qualité des matières organiques 2.Thus the flow G of hot gas is perfectly clean and does not degrade the quality of the organic material 2.
Les figures 2 à 5 montrent un mode de réalisation d'un générateur de gaz chaud selon l'invention.Figures 2 to 5 show an embodiment of a hot gas generator according to the invention.
La figure 2 montre une vue externe de ce générateur 8. On voit qu'il comporte une cuve 23 sensiblement cylindrique. Cette cuve sera disposée d'une façon verticale (comme représenté sur la figure) dans le cas d'un foyer à biomasse et elle sera disposée de façon horizontale dans le cas d'un brûleur à combustibles liquides ou gazeux. La partie inférieure de la cuve porte le brûleur ou le foyer 9, la partie supérieure porte la cheminée 21 d'évacuation des gaz de combustion issus du brûleur ou du foyer 9. On voit également sur cette figure le conduit 22 d'amenée de gaz frais. Ce conduit traverse radialement la cheminée 21 et (comme cela est plus particulièrement visible aux figures 3 à 5) il comporte une extrémité qui est disposée coaxialement à la cuve 23 et à l'intérieur de la cheminée 21 d'évacuation des gaz de combustion.FIG. 2 shows an external view of this generator 8. It can be seen that it comprises a substantially cylindrical tank 23. This tank will be arranged vertically (as shown in the figure) in the case of a biomass fireplace and it will be arranged horizontally in the case of a liquid or gaseous fuel burner. The lower part of the tank carries the burner or the hearth 9, the upper part carries the chimney 21 for evacuation of the combustion gases from the burner or the hearth 9. This gas supply duct 22 is also seen in this figure. fresh. This duct radially crosses the chimney 21 and (as is more particularly visible in Figures 3 to 5) it has an end which is disposed coaxially with the vessel 23 and inside the chimney 21 for discharging the combustion gases.
On voit enfin sur la figure 2 la canalisation 7 qui évacue les gaz chauds hors du générateur 8. La structure interne du générateur 8 est plus particulièrement visible sur les figures 3 à 5.Finally, FIG. 2 shows the pipe 7 which discharges the hot gases out of the generator 8. The internal structure of the generator 8 is more particularly visible in FIGS. 3 to 5.
La cuve 23 du générateur entoure un certain nombre de tubulures qui sont organisées en différents circuits d'échange.The tank 23 of the generator surrounds a number of tubings which are organized in different exchange circuits.
Le générateur qui est représenté ici comporte deux circuits d'échange concentriques.The generator shown here has two concentric exchange circuits.
Chaque circuit d'échange est disposé dans une chambre spécifique au travers de laquelle circulent les gaz de combustion issus du brûleur.Each exchange circuit is arranged in a specific chamber through which the combustion gases from the burner flow.
Le générateur comporte ainsi une première chambre 24 cylindrique entourant l'axe du générateur et qui est délimitée par une première cloison cylindrique 26 portée par un support 27 solidaire du fond de la cuve 23 (figure 5) . Le générateur 8 comporte aussi une deuxième chambre 25 annulaire, entourant la première chambre 24 et qui est délimitée d'une part par la première cloison 26 et d'autre part par une deuxième cloison 28, concentrique à la première cloison 26. La deuxième cloison 28 est solidaire d'une plaque 29 qui est fixée au niveau d'une extrémité supérieure de la cuve 23 et sur laquelle est fixé un boîtier 30 portant la cheminée 21.The generator thus comprises a first cylindrical chamber 24 surrounding the axis of the generator and which is delimited by a first cylindrical partition 26 carried by a support 27 integral with the bottom of the tank 23 (FIG. 5). The generator 8 also comprises a second annular chamber 25, surrounding the first chamber 24 and which is delimited on the one hand by the first partition 26 and on the other by a second partition 28, concentric with the first partition 26. The second partition 28 is secured to a plate 29 which is fixed at an upper end of the tank 23 and on which is fixed a housing 30 carrying the chimney 21.
Comme cela est plus particulièrement visible sur la figure 6, les gaz de combustion C issus du brûleur ou du foyer 9 parcourent tout d'abord la première chambre 24 suivant la direction donnée par les flèches C (verticalement de bas en haut, soit du brûleur ou du foyer 9 vers la cheminée 21) . Les gaz sont arrêtés par la plaque de séparation supérieure 29 et ils circulent ensuite dans la deuxième chambre 25 suivant la direction inverse, verticalement et du haut vers le bas.As is more particularly visible in FIG. 6, the combustion gases C originating from the burner or the hearth 9 firstly pass through the first chamber 24 in the direction indicated by the arrows C (vertically from bottom to top, ie from the burner or fireplace 9 to the chimney 21). The gases are stopped by the upper partition plate 29 and then flow into the second chamber 25 in the reverse direction, vertically and from top to bottom.
Enfin les gaz de combustion sont arrêtés par le fond de la cuve 23 et ils remontent au travers d'une troisième chambre 31 délimitée par la cuve 23 et la deuxième cloison 28 pour rejoindre la cheminée 21 au travers de trous 32 réalisés dans la plaque 29 (figure 6) . Ainsi le sens de circulation des gaz de combustion dans la deuxième chambre 25 est l'inverse de celui qu'il a dans la première chambre 24.Finally, the combustion gases are stopped by the bottom of the tank 23 and they go up through a third chamber 31 delimited by the tank 23 and the second partition 28 to join the chimney 21 through holes 32 made in the plate 29. (Figure 6). Thus the flow direction of the combustion gases in the second chamber 25 is the opposite of that it has in the first chamber 24.
Le sens de circulation des gaz de combustion dans la troisième chambre 31 est par ailleurs l'inverse de celui qu'il a dans la deuxième chambre 25.The flow direction of the combustion gases in the third chamber 31 is also the opposite of that which it has in the second chamber 25.
On remarque également sur les figures que le gaz frais est amené au générateur au niveau du conduit 22 qui est disposé coaxialement aux différentes chambres 24, 25, 31 et à l'intérieur de la cheminée 21 d'évacuation des gaz de combustion .It is also noted in the figures that the fresh gas is supplied to the generator at the duct 22 which is arranged coaxially with the various chambers 24, 25, 31 and inside the chimney 21 for evacuating the combustion gases.
Le gaz frais est donc introduit dans le générateur 8 suivant une direction D qui est inverse de celle du flux C des gaz de combustion issus du brûleur ou du foyer. Ce sens inverse est respecté dans la première chambre 24. Il est également respecté dans la deuxième chambre 25 (ainsi que dans la troisième chambre 31) .The fresh gas is introduced into the generator 8 in a direction D which is the opposite of that of the flow C of the combustion gases from the burner or the hearth. This opposite direction is respected in the first chamber 24. It is also respected in the second chamber 25 (as well as in the third chamber 31).
En effet les gaz frais sont amenés à partir du conduit 22 dans l ' échangeur qui est disposé dans la deuxième chambre 25 par des tubulures 33 qui conduisent les gaz frais au niveau du fond de la deuxième chambre 25.Indeed the fresh gases are brought from the conduit 22 into the exchanger which is arranged in the second chamber 25 by pipes 33 which conduct the fresh gases at the bottom of the second chamber 25.
Ces gaz frais remontent donc dans la deuxième chambre dans un sens inverse de celui des gaz de combustion dans cette dernière. Cette orientation particulière du sens de l'écoulement de gaz à chauffer dans une direction inverse de celle des gaz de combustion permet d'améliorer le rendement de l'échange thermique au niveau de chaque circuit d'échange.These fresh gases back in the second chamber in a direction opposite to that of the combustion gases in the latter. This particular orientation of the direction of the flow of gas to be heated in a direction opposite to that of the combustion gases makes it possible to improve the efficiency of the heat exchange at each exchange circuit.
Conformément à l'invention, chaque circuit d'échange disposé dans une chambre est conçu de façon à optimiser le transfert thermique.According to the invention, each exchange circuit arranged in a chamber is designed to optimize heat transfer.
Chaque circuit d'échange comporte ainsi un canal collecteur de sortie unique pour les gaz chauds et plusieurs canaux d'admission. Le collecteur de sortie et les canaux d'admission sont reliés les uns aux autres par des tubulures sensiblement parallèles les unes aux autres.Each exchange circuit thus comprises a single outlet collection channel for the hot gases and several intake channels. The outlet manifold and the inlet channels are connected to each other by pipes substantially parallel to each other.
Comme cela est visible aux figures 5 et 6, le premier circuit d'échange (situé dans la première chambre 24) comporte donc un collecteur de sortie 34.1 annulaire qui est disposé au voisinage du brûleur ou du foyer 9.As can be seen in FIGS. 5 and 6, the first exchange circuit (located in the first chamber 24) therefore comprises an annular outlet manifold 34.1 which is arranged in the vicinity of the burner or the hearth 9.
Le premier circuit d'échange comporte aussi quatre canaux d'admission 35al, 35bl, 35cl et 35dl (figure 6). Ces canaux sont tous annulaires sauf le canal 35al qui est en fait une boîte disposée sensiblement au niveau de l'axe du générateur.The first exchange circuit also has four intake channels 35a1, 35b1, 35c1 and 35d1 (FIG. 6). These channels are all annular except the channel 35al which is in fact a box disposed substantially at the axis of the generator.
Les diamètres des canaux 35bl, 35cl et 35dl sont par ailleurs différents les uns des autres.The diameters of the channels 35b1, 35c1 and 35d1 are also different from each other.
Le collecteur de sortie 34.1 et les canaux d'admission 35al, 35bl,35cl et 35dl sont reliés les uns aux autres par des tubulures 36 sensiblement parallèles les unes aux autres.The outlet manifold 34.1 and the inlet channels 35a1, 35b1, 35c1 and 35d1 are connected to each other by manifolds 36 substantially parallel to each other.
Pour la clarté de la figure, seules les tubulures 36 médianes reliant le canal 35al et le collecteur 34.1 sont visibles sur la figure 6. Les autres tubulures reliant les canaux 35bl, 35cl, 35dl au collecteur 34.1 sont visibles sur les figures 4 et 5.For clarity of the figure, only the median tubes 36 connecting the channel 35al and the manifold 34.1 are visible in Figure 6. The other pipes connecting the channels 35bl, 35cl, 35dl to the manifold 34.1 are visible in Figures 4 and 5.
La division du circuit d'échange à partir de plusieurs canaux d'admission permet d'optimiser la mise en place des tubulures 26 dans le volume de la chambre considérée. On augmente ainsi fortement la surface d'échange thermique entre les gaz de combustion et les tubulures de gaz à chauffer. On améliore ainsi le rendement du générateur et également sa capacité à engendrer un volume de gaz chaud important . Comme cela est plus particulièrement visible aux figures 4 et 5, certaines tubulures 36 sont droites et d'autres tubulures ont un profil ondulé.The division of the exchange circuit from several intake channels optimizes the introduction of tubing 26 in the volume of the chamber considered. This greatly increases the heat exchange surface between the combustion gases and the gas pipes to be heated. This improves the efficiency of the generator and also its ability to generate a large volume of hot gas. As is more particularly visible in Figures 4 and 5, some pipes 36 are straight and other pipes have a corrugated profile.
Ce profil ondulé permet lui aussi d'augmenter la surface d'échange thermique. Le générateur de gaz chaud selon l'invention comprend aussi un conduit 37 torique assurant la collecte des gaz chauds fournis par les différents circuits d'échange.This corrugated profile also allows to increase the heat exchange surface. The hot gas generator according to the invention also comprises a toroidal conduit 37 for collecting the hot gases supplied by the different exchange circuits.
Le conduit 37 porte la canalisation 7 d'évacuation des gaz chauds engendrés par le générateur. Le conduit 37 est relié par des tubulures (38.1,38.2) aux collecteurs de sortie (34.1,34.2) des différents circuits d' échange . Ainsi le collecteur 34.1 du premier circuit d'échange est relié au conduit 37 par des tubulures 38.1 à section rectangulaire. Voir en particulier les figures 4 et 5.The duct 37 carries the pipe 7 for discharging the hot gases generated by the generator. The duct 37 is connected by tubings (38.1, 38.2) to the outlet manifolds (34.1, 34.2) of the different exchange circuits. Thus the manifold 34.1 of the first exchange circuit is connected to the conduit 37 by tubing 38.1 rectangular section. See in particular Figures 4 and 5.
Le deuxième circuit d'échange (celui qui est disposé dans la deuxième chambre 25) a une structure analogue à celle du premier circuit d'échange.The second exchange circuit (that which is arranged in the second chamber 25) has a structure similar to that of the first exchange circuit.
Il comporte un collecteur de sortie 34.2 annulaire qui est disposé au voisinage de la plaque 29.It comprises an annular outlet manifold 34.2 which is arranged in the vicinity of the plate 29.
Ce deuxième circuit d'échange comporte quatre canaux d'admission 35a2, 35b2, 35c2 et 35d2. Ces canaux sont tous annulaires et disposé au niveau de l'extrémité inférieure de la deuxième chambre 25.This second exchange circuit comprises four intake channels 35a2, 35b2, 35c2 and 35d2. These channels are all annular and disposed at the lower end of the second chamber 25.
Comme cela a déjà été précisé, le gaz frais est amené à partir du conduit 22 jusqu'aux différents canaux d'admission 35a2, 35b2, 35c2, 35d2 par des tubulures 33 à section rectangulaire (voir figure 3).As already mentioned, the fresh gas is fed from the duct 22 to the various intake ducts 35a2, 35b2, 35c2, 35d2 by tubing 33 with a rectangular section (see FIG. 3).
Des tubulures 36 au profil droit ou ondulé relient les canaux d'admission et le collecteur de sortie 34.2.Tubing 36 with a straight or corrugated profile connects the inlet channels and the outlet manifold 34.2.
Ce dernier est lui-même relié au conduit 37 d'évacuation des gaz chauds par des tubulures 38.2 à section rectangulaire. Voir en particulier les figures 3, 5 et 6.The latter is itself connected to the duct 37 for discharging hot gases by tubing 38.2 with a rectangular section. See in particular Figures 3, 5 and 6.
La combinaison de deux circuits d'échange thermique permet d'améliorer le rendement du générateur. En effet des calories fournies par les gaz de combustion peuvent être prélevées au niveau de chacun des circuits d'échange.The combination of two heat exchange circuits makes it possible to improve the efficiency of the generator. Indeed, calories provided by the combustion gases can be sampled at each of the exchange circuits.
Par ailleurs le passage des tubulures 33 dans la troisième chambre 31 permet d'assurer un préchauffage du gaz frais en amont de la deuxième chambre et utilise encore une partie des calories disponibles. Le générateur selon l'invention assure donc sous un volume relativement compact un excellent rendement thermique.Furthermore the passage of the pipes 33 in the third chamber 31 ensures a preheating of the fresh gas upstream of the second chamber and still uses a portion of the available calories. The generator according to the invention therefore provides in a relatively compact volume an excellent thermal efficiency.
Concrètement il est possible de réaliser avec deux circuits d'échange un générateur 8 engendrant un flux ayant une vitesse comprise entre 5,0 m/s et 8,0 m/s de gaz chaud ayant une température de l'ordre de 600 0C.Specifically it is possible to achieve with two exchange circuits a generator 8 generating a flow having a speed between 5.0 m / s and 8.0 m / s of hot gas having a temperature of about 600 0 C .
L'Homme du Métier dimensionnera aisément le générateur en fonction des caractéristiques souhaitées (température et débit) . Les formes et longueurs différentes pour les tubulures 36 (à l'intérieur d'un même circuit d'échange et entre les différents circuits d'échange) conduisent à des pertes de charges différentes au niveau de chaque tubulure. Afin d'assurer un débit de génération de gaz chaud homogène on prévoira des moyens permettant de réguler la vitesse des gaz chauds sortant des différentes tubulures.The skilled person will easily size the generator according to the desired characteristics (temperature and flow). The different shapes and lengths for the pipes 36 (within the same exchange circuit and between the different exchange circuits) lead to different head losses at each tubing. In order to ensure a homogeneous hot gas generation flow, means will be provided for regulating the speed of the hot gases leaving the various pipes.
Ces moyens sont par exemple constitués par des clapets qui seront interposées entre le conduit 22 d'amenée de gaz frais et chaque tube qui relie ce conduit aux différents canaux d'admission 35 (35al, ..., 35dl ... 35a2,..., 35d2).These means are for example constituted by valves which will be interposed between the duct 22 for supplying fresh gas and each tube which connects this duct to the various inlet channels 35 (35a1,..., 35d1... 35a2,. .., 35d2).
Ces moyens ne sont pas représentés en détails sur les figures 3 à 6. Ils sont disposés au niveau des différentes brides repérées 39 (figures 5 et 6) . Par ailleurs afin de permettre une maîtrise de la vitesse des gaz au niveau de chaque groupe de tubulures, les canaux d'admission 35 seront compartimentés en différents secteurs, chaque secteur étant relié à un clapet unique. Il n'y aura pas alors de perturbation des flux de gaz sortant de chaque clapet. On évite ainsi les retours de flux d'un canal d'admission vers un clapet et le débit se trouve régularisé.These means are not shown in detail in Figures 3 to 6. They are arranged at the different flanges marked 39 (Figures 5 and 6). Moreover, in order to allow control of the gas velocity at each group of pipes, the inlet channels 35 will be compartmentalized in different sectors, each sector being connected to a single valve. There will be no disruption of the gas flow coming out of each valve. This avoids flow returns from an intake channel to a valve and the flow is regularized.
Le compartimentage des canaux 35 sera simplement réalisé en prévoyant des cloisons de tôles divisant le canal annulaire considéré en différents secteurs. Les figures 7a et 7b montrent la structure d'un tel clapet 40 de régulation de débit.The subdivision of the channels 35 will be simply achieved by providing sheet partitions dividing the annular channel considered in different sectors. Figures 7a and 7b show the structure of such a valve 40 of flow control.
Il comporte un plongeur 41 comportant une extrémité conique 42 qui est destinée à coopérer avec une portée complémentaire d'un support 43. Le support 43 est vissé à une embase 44. Un ressort 45 est dimensionné uniquement pour résister au poids du plongeur 41. Ce dernier est donc en appui sur sa portée dans la position de repos du clapet (tel que représenté figure 7a) .It comprises a plunger 41 having a conical end 42 which is intended to cooperate with a complementary bearing surface of a support 43. The support 43 is screwed to a base 44. A spring 45 is dimensioned solely to withstand the weight of the plunger 41. last is therefore supported on its range in the rest position of the valve (as shown in Figure 7a).
Le sens de passage du gaz frais est représenté par les flèches D.The direction of passage of the fresh gas is represented by the arrows D.
Le gaz frais issu du conduit 22 entre dans le clapet 40 par l'orifice 46. Il pousse le plongeur 41 contre l'action du ressort 45. Le gaz frais passe dans la chambre 47 et ressort en aval par l'alésage 48 pour aller vers le canal d'admission 35 considéré.The fresh gas from the conduit 22 enters the valve 40 through the orifice 46. It pushes the plunger 41 against the action of the spring 45. The fresh gas passes into the chamber 47 and spring downstream through the bore 48 to go to the inlet channel 35 considered.
On voit que la section de passage du gaz va varier en fonction de la position axiale du plongeur 41. Un accroissement de la pression du gaz chaud en aval va donc repousser le plongeur vers le haut et réduire la pression d'admission de gaz frais.It can be seen that the gas passage section will vary as a function of the axial position of the plunger 41. An increase in the pressure of the hot gas downstream will therefore push the plunger upwards and reduce the fresh gas inlet pressure.
Le clapet permet donc de réguler la pression de gaz chaud et régule ainsi la vitesse de l'air dans les différentes tubulures. En fonction des caractéristiques de perte de charge des tubulures 36 considérées les caractéristiques du clapet seront bien entendu différentes.The valve thus makes it possible to regulate the hot gas pressure and thus regulates the speed of the air in the various pipes. Depending on the pressure drop characteristics of the pipes 36 considered characteristics of the valve will of course be different.
On dimensionnera les différents clapets en fonction du résultat recherché qui est d'obtenir la même vitesse de sortie des gaz chauds pour toutes les tubulures au niveau du conduit d'évacuation 37.The different valves will be dimensioned according to the desired result, which is to obtain the same hot gas outlet velocity for all the pipes at the exhaust duct 37.
L'Homme du Métier dimensionnera aisément ces différents clapets en fonction des caractéristiques du générateur qu'il réalise . Le générateur de gaz chaud selon invention peut être mis en œuvre dans différentes installations.The skilled person will easily size these different valves according to the characteristics of the generator that he realizes. The hot gas generator according to the invention can be implemented in different installations.
La figure 8 montre ainsi une installation de déshydratation, par exemple pour du bois d' œuvre.Figure 8 thus shows a dehydration plant, for example for timber.
Cette installation 1 comprend une enceinte 50 fermée à l'intérieur de laquelle sont disposés les éléments 58 de bois d'œuvre à sécher, placés par exemple sur un chariot.This installation 1 comprises a closed enclosure 50 inside which are disposed the elements 58 of timber to be dried, placed for example on a carriage.
Le générateur 8 fourni de l'air chaud par sa canalisation 7 d'évacuation des gaz et il reçoit de l'air frais par son conduit 22. La canalisation 7 est reliée à l'enceinte 50 par une conduite 52.The generator 8 supplies hot air through its gas evacuation pipe 7 and receives fresh air through its conduit 22. The pipe 7 is connected to the enclosure 50 via a pipe 52.
Après circulation dans l'enceinte 50, l'air chaud est évacué par une conduite de sortie 53 qui est reliée à un condenseur 13. Ce condenseur est refroidi par de l'air frais extérieur circulant dans un circuit d'échange et entrant dans ce circuit par la tubulure d'entrée 14. Le condenseur 13 permet d'assurer la déshydratation de l'air chaud circulant dans la conduite 53.After circulation in the enclosure 50, the hot air is discharged through an outlet pipe 53 which is connected to a condenser 13. This condenser is cooled by fresh outside air circulating in an exchange circuit and entering this circuit through the inlet manifold 14. The condenser 13 makes it possible to ensure the dehydration of the hot air flowing in the pipe 53.
L'air ainsi déshydraté est amené au conduit d'admission 22 du générateur 8 par la conduite 59. L'eau liquide (H20) est récupérée au niveau du fond 16 du condenseur 13. Un accélérateur (tel une pompe) 17 permet d'accélérer et réguler le flux d'air chaud G circulant dans l'enceinte 50 et dans le générateur 8.The air thus dehydrated is fed to the intake duct 22 of the generator 8 via the pipe 59. The liquid water (H20) is recovered at the bottom 16 of the condenser 13. An accelerator (such as a pump) 17 allows accelerate and regulate the flow of hot air G flowing in the enclosure 50 and in the generator 8.
Ainsi le conduit amenant l'air frais 22 au générateur 8 est relié à un circuit de récupération de l'air chaud qui est extrait de l'enceinte 50 recevant les matériaux à déshydrater .Thus the duct bringing the fresh air 22 to the generator 8 is connected to a hot air recovery circuit which is extracted from the enclosure 50 receiving the materials to be dehydrated.
Une partie de l'air chaud récupéré dans le condenseur 13 est utilisée pour activer le brûleur ou le foyer 9, par le conduit 57. Ce conduit est relié au conduit 22 au moyen d'une vanne trois voies 51 qui a pour fonction de permettre l'extraction d'une quantité d'air préchauffé pour compléter les pertes éventuellement engendrées par des fuites. Une autre vanne trois voies 54 est interposée entre une partie amont (conduit 57), une partie aval 60 (vers le brûleur) et un échappement 61. Elle permet la régulation du flux d'air préchauffé nécessaire à l'activation du brûleur ou du foyerPart of the hot air recovered in the condenser 13 is used to activate the burner or the hearth 9, via the duct 57. This duct is connected to the duct 22 by means of a three-way valve 51 whose function is to enable the extraction of a quantity of preheated air to supplement the losses possibly caused by leaks. Another three-way valve 54 is interposed between an upstream portion (duct 57), a downstream portion 60 (towards the burner) and an exhaust 61. It allows the regulation of the preheated air flow necessary for the activation of the burner or the home
9. L'excédent final étant dirigé par l'échappement 61 vers l'extérieur ou une autre application via la vanne 54. Ce fonctionnement en circuit fermé assure un préchauffage de l'air frais et améliore ainsi le rendement de9. The final surplus being directed by the exhaust 61 to the outside or another application via the valve 54. This closed circuit operation ensures a preheating of the fresh air and thus improves the efficiency of the
1' installation.1 installation.
Par ailleurs un mélangeur 55 est disposé à l'entrée de l'enceinte 50. Il est possible au niveau de ce mélangeur de doser l'air chaud issu du générateur 8 avec une partie de l'air frais sorti du condenseur 13 au moyen d'un volet 56.Furthermore, a mixer 55 is disposed at the inlet of the enclosure 50. It is possible at this mixer to dose the hot air from the generator 8 with a portion of the fresh air leaving the condenser 13 by means of a shutter 56.
On peut ainsi réguler de façon relativement précise la température de déshydratation. On pourra ainsi réaliser une installation fonctionnant de façon continue avec un air à 1200C assurant un séchage rapide du bois d'oeuvre.It is thus possible to regulate the dehydration temperature relatively accurately. It will thus be possible to produce an installation operating continuously with an air at 120 ° C. ensuring rapid drying of the timber.
Bien entendu, il est possible de réaliser des installations de séchage pour des matériaux différents, par exemple pour des céréales. Of course, it is possible to realize drying facilities for different materials, for example for cereals.

Claims

REVENDICATIONS
1. Générateur (8) de gaz chaud, notamment pour une unité (1) de déshydratation ou de séchage, générateur comportant un brûleur ou un foyer (9) et caractérisé en ce qu'il comporte au moins un circuit d'échange (10) comportant au moins une tubulure dans laquelle circule le gaz à chauffer, tubulure comportant une extrémité (11) d'admission en gaz frais et une sortie (12) d'évacuation en gaz chaud, tubulure présentant une surface d'échange thermique entre les gaz de combustion engendrés par le brûleur ou le foyer (9) et le gaz à chauffer circulant dans la tubulure, la tubulure assurant par ailleurs une séparation physique entre les gaz chauffés et les gaz de combustion engendrés par le brûleur ou le foyer (9).1. Generator (8) of hot gas, especially for a unit (1) for dehydration or drying, generator comprising a burner or a hearth (9) and characterized in that it comprises at least one exchange circuit (10). ) comprising at least one tubular in which the gas to be heated circulates, tubing having a fresh gas inlet end (11) and a hot gas discharge outlet (12), tubing having a heat exchange surface between them. combustion gases generated by the burner or the hearth (9) and the gas to be heated circulating in the pipe, the pipe also ensuring a physical separation between the heated gases and the combustion gases generated by the burner or the hearth (9) .
2. Générateur de gaz chaud selon la revendication 1, caractérisé en ce que la ou les tubulures (36) des circuits d'échange sont orientées de telle sorte que le flux (D) de gaz chauffé circule dans la tubulure suivant une direction inverse de celle du flux (C) des gaz de combustion issus du brûleur ou foyer (9) . 2. Hot gas generator according to claim 1, characterized in that the or the pipes (36) of the exchange circuits are oriented so that the flow (D) of heated gas flows in the tubing in a reverse direction of that of the flow (C) of the combustion gases from the burner or furnace (9).
3. Générateur de gaz chaud selon une des revendications 1 ou 2, caractérisé en ce qu'il comporte des moyens (40) permettant de réguler la vitesse des gaz chauds sortant des différentes tubulures (36).3. Hot gas generator according to one of claims 1 or 2, characterized in that it comprises means (40) for regulating the speed of hot gases leaving the various pipes (36).
4. Générateur de gaz chaud selon une des revendications 1 à 3, caractérisé en ce que chaque circuit d'échange comporte un canal collecteur de sortie (34.1,34.2) et au moins un canal d'admission (35al,... 35dl, 35a2,... 35d2), le collecteur de sortie et le canal d'admission étant reliés l'un à l'autre par des tubulures (36) sensiblement parallèles les unes aux autres.4. Hot gas generator according to one of claims 1 to 3, characterized in that each exchange circuit comprises an outlet collector channel (34.1, 34.2) and at least one inlet channel (35al, ... 35dl, 35a2, ... 35d2), the outlet manifold and the inlet channel being connected to each other by pipes (36) substantially parallel to each other.
5. Générateur de gaz chaud selon la revendication 4, caractérisé en ce que les canaux d'admission (35al..., 35dl, 35a2..., 35d2) et le collecteur de sortie (34.1, 34.2) sont sensiblement annulaires. 5. hot gas generator according to claim 4, characterized in that the inlet channels (35al ..., 35dl, 35a2 ..., 35d2) and the outlet manifold (34.1, 34.2) are substantially annular.
6. Générateur de gaz chaud selon une des revendications 4 ou 5, caractérisé en ce qu'il comporte au moins un jeu de tubulures (36) ayant un profil ondulé. 6. Hot gas generator according to one of claims 4 or 5, characterized in that it comprises at least one set of tubes (36) having a corrugated profile.
7. Générateur de gaz chaud selon une des revendications 4 à 6, caractérisé en ce qu'il comprend un conduit (37) torique de collecte des gaz chauds, conduit qui est relié au collecteur de sortie (34.1, 34.2) par des tubes (38.1, 38.2). 7. hot gas generator according to one of claims 4 to 6, characterized in that it comprises a conduit (37) for collecting hot gases, which conduit is connected to the outlet manifold (34.1, 34.2) by tubes ( 38.1, 38.2).
8. Générateur de gaz chaud selon une des revendications 4 à 7, caractérisé en ce qu'il comprend un conduit (22) d'amenée de gaz frais qui est raccordé aux différents canaux d'admission (35al..., 35dl, 35a2..., 35d2) par des tubes (33).8. Hot gas generator according to one of claims 4 to 7, characterized in that it comprises a conduit (22) for supplying fresh gas which is connected to the different inlet channels (35al ..., 35dl, 35a2 ..., 35d2) by tubes (33).
9. Générateur de gaz chaud selon la revendication 8, caractérisé en ce que les moyens permettant de réguler la vitesse des gaz chauds sont constitués par des clapets (40) interposées entre le conduit d'amenée de gaz frais (22) et chaque tube (33) reliant ce conduit aux différents canaux d'admission (35al...35dl, 35a2...35d2) . 9. Hot gas generator according to claim 8, characterized in that the means for regulating the speed of hot gases are constituted by valves (40) interposed between the fresh gas supply duct (22) and each tube ( 33) connecting this conduit to the different inlet channels (35al ... 35dl, 35a2 ... 35d2).
10. Générateur de gaz chaud selon la revendication 9, caractérisé en ce que les canaux d'admission (35al...35dl, 35a2...35d2) sont compartimentés en différents secteurs, chaque secteur étant relié à un clapet (40) unique.10. Hot gas generator according to claim 9, characterized in that the inlet channels (35al ... 35dl, 35a2 ... 35d2) are divided into different sectors, each sector being connected to a single valve (40). .
11. Générateur de gaz chaud selon une des revendications 1 à 10, caractérisé en ce qu'il comporte au moins deux circuits d'échange, chaque circuit d'échange étant disposé dans une chambre (24, 25) au travers de laquelle circulent les gaz de combustion (C) .11. hot gas generator according to one of claims 1 to 10, characterized in that it comprises at least two exchange circuits, each exchange circuit being arranged in a chamber (24, 25) through which circulate the combustion gas (C).
12. Générateur de gaz chaud selon la revendication 11, caractérisé en ce que les deux chambres (24, 25) sont concentriques, le passage des gaz de combustion d'une chambre à l'autre s 'effectuant au niveau d'une première extrémité d'une première chambre, le sens de circulation des gaz de combustion étant dans la deuxième chambre l'inverse de celui qu'il y a dans la première chambre.12. Hot gas generator according to claim 11, characterized in that the two chambers (24, 25) are concentric, the passage of combustion gases from one chamber to the other being effected at a first end. a first chamber, the flow direction of the combustion gases being in the second chamber the opposite of that in the first chamber.
13. Générateur de gaz chaud selon une des revendications 8 et 12, caractérisé en ce que le conduit (22) d'amenée de gaz frais est disposée coaxialement à la première chambre (24) et à l'intérieur d'une cheminée (21) d'évacuation des gaz de combustion.13. Hot gas generator according to one of claims 8 and 12, characterized in that the duct (22) for supplying fresh gas is arranged coaxially with the first chamber (24) and inside a chimney (21). ) for the evacuation of combustion gases.
14. Générateur de gaz chaud selon la revendication 12 ou 13, caractérisé en ce que le brûleur ou foyer (9) est disposé au niveau d'une deuxième extrémité de la première chambre (24) .14. Hot gas generator according to claim 12 or 13, characterized in that the burner or hearth (9) is arranged at a second end of the first chamber (24).
15. Générateur de gaz chaud selon les revendications 8 et 12 à 14, caractérisé en ce qu'il comporte une troisième chambre (31) entourant la deuxième chambre (25), troisième chambre qui renferme des tubulures (33) raccordant le circuit d'échange de la deuxième chambre au conduit d'amenée de gaz frais .15. Hot gas generator according to claims 8 and 12 to 14, characterized in that it comprises a third chamber (31) surrounding the second chamber (25), third chamber which contains tubings (33) connecting the circuit of exchange of the second chamber to the supply duct of fresh gas.
16. Installation (1) de déshydratation ou de séchage, notamment pour matériaux ligneux, caractérisée en ce qu'elle comporte au moins un générateur de gaz chaud (8) suivant une des revendications précédentes.16. Installation (1) dehydration or drying, especially for woody materials, characterized in that it comprises at least one hot gas generator (8) according to one of the preceding claims.
17. Installation de déshydratation ou de séchage selon la revendication 16, caractérisée en ce que le conduit (22) d'amenée de gaz frais au générateur de gaz chaud (8) est relié à un circuit de récupération de l'air chaud qui est extrait d'une enceinte (3, 50) recevant le ou les matériaux à déshydrater .Dehydrating or drying plant according to claim 16, characterized in that the fresh gas supply duct (22) to the hot gas generator (8) is connected to a hot air recovery circuit which is extracted from an enclosure (3, 50) receiving the material or materials to be dehydrated.
18. Installation de déshydratation ou de séchage selon la revendication 17, caractérisée en ce que le circuit de récupération de l'air chaud incorpore au moins un condenseur (13) assurant la déshydratation de l'air.18. dehydration or drying plant according to claim 17, characterized in that the hot air recovery circuit incorporates at least one condenser (13) ensuring the dehydration of the air.
19. Installation de déshydratation ou de séchage selon une des revendications 16 à 18, caractérisée en ce qu'elle comprend un circuit d'activation du brûleur ou foyer (9) utilisant une partie de l'air chaud issu du condenseur (13).19. Dehydration or drying plant according to one of claims 16 to 18, characterized in that it comprises an activation circuit of the burner or hearth (9) using a portion of the hot air from the condenser (13).
20. Installation de déshydratation ou de séchage selon une des revendications 17 à 19, caractérisée en ce qu'elle comprend un mélangeur (55) disposé en amont de l'enceinte (50) et permettant de mélanger l'air chaud issu du générateur (8) avec une partie d'air frais sorti du condenseur (13). 20. Dehydration or drying plant according to one of claims 17 to 19, characterized in that it comprises a mixer (55) disposed upstream of the chamber (50) and for mixing the hot air from the generator ( 8) with a portion of fresh air leaving the condenser (13).
EP07788897A 2006-06-22 2007-06-18 Hot gas generator and drying or dehydratiion installation employing such a generator Not-in-force EP2038598B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07788897T PL2038598T3 (en) 2006-06-22 2007-06-18 Hot gas generator and drying or dehydratiion installation employing such a generator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0605589A FR2902866B1 (en) 2006-06-22 2006-06-22 HOT GAS GENERATOR AND DRYING OR DEHYDRATION INSTALLATION USING SUCH A GENERATOR
PCT/FR2007/001004 WO2007147961A2 (en) 2006-06-22 2007-06-18 Hot gas generator and drying or dehydratiion installation employing such a generator

Publications (2)

Publication Number Publication Date
EP2038598A2 true EP2038598A2 (en) 2009-03-25
EP2038598B1 EP2038598B1 (en) 2012-01-25

Family

ID=37667564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07788897A Not-in-force EP2038598B1 (en) 2006-06-22 2007-06-18 Hot gas generator and drying or dehydratiion installation employing such a generator

Country Status (10)

Country Link
US (1) US8011113B2 (en)
EP (1) EP2038598B1 (en)
AT (1) ATE543062T1 (en)
BR (1) BRPI0713687A2 (en)
CA (1) CA2655649A1 (en)
DK (1) DK2038598T3 (en)
FR (1) FR2902866B1 (en)
PL (1) PL2038598T3 (en)
RU (1) RU2444688C2 (en)
WO (1) WO2007147961A2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2970772B1 (en) 2011-01-25 2017-06-23 Jcl Tech PROCESS FOR THE THERMAL TREATMENT OF WOOD WITH GASES DEHYDRATES AND DEOUSSIERS
CN102494529A (en) * 2011-11-15 2012-06-13 天龙科技炉业(无锡)有限公司 Constant-temperature drying box utilizing flue gas waste heat for heating
ITRM20110645A1 (en) * 2011-12-05 2013-06-06 Ludovico Moresi PLANT FOR THE PRODUCTION OF THERMAL ENERGY.
SE1200230A1 (en) * 2012-04-17 2013-08-27 Alent Drying Ab Method and apparatus for drying wood
RU2532060C2 (en) * 2013-02-13 2014-10-27 Александр Николаевич Крутин Hot gas generator and device for drying bulk materials in fluidized bed, which uses such generator
CN104567283A (en) * 2013-10-10 2015-04-29 宁夏琪凯节能设备有限公司 Novel energy-saving slag dryer
CN103528347A (en) * 2013-11-05 2014-01-22 宁夏新航能源环境科技有限公司 Energy-saving dryer
CN104729264B (en) * 2015-03-27 2017-04-12 北京宝莲纳新材料技术有限公司 Multi-level hot-air drying system
CN105157402A (en) * 2015-09-25 2015-12-16 江苏海狮机械集团有限公司 Linen drying device with biomass energy utilized
CN105352305A (en) * 2015-12-03 2016-02-24 贵州遵义新佳裕食品有限公司 Vertical and split type drying oven
CN108344287B (en) * 2018-02-13 2023-11-10 国家粮食局科学研究院 Energy-saving and environment-friendly large-scale grain drying complete device and drying method
CN108981154A (en) * 2018-06-05 2018-12-11 芜湖秀成机械科技有限公司 A kind of environmental protection and energy saving biomass thermal wind furnace
CN109520221A (en) * 2018-10-10 2019-03-26 宜宾市江安县庆慧丰农业科技开发有限公司 A kind of drying system of baking agricultural products
CN114562872B (en) * 2022-02-18 2023-08-04 德州职业技术学院（德州市技师学院） Energy-saving dryer for crops
CN116045622A (en) * 2022-12-29 2023-05-02 贵州金泽新能源科技有限公司 Safety interlocking control setting for each equipment of industrial hot air drying system

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR767424A (en) * 1934-07-16
NL46284C (en) * 1900-01-01
GB423991A (en) * 1934-06-22 1935-02-12 Krupp Fried Grusonwerk Ag Improvements in or relating to air-heating apparatus
US2119817A (en) * 1936-10-12 1938-06-07 Tech Studien Ag High temperature gas heater
GB755175A (en) * 1953-09-09 1956-08-15 Petro Chem Process Company Improvements in or relating to fluid heater
GB780925A (en) * 1956-05-01 1957-08-07 Lorenz Hochheim Apparatus for heating air
FR1194319A (en) * 1958-04-09 1959-11-09
GB962561A (en) * 1959-10-23 1964-07-01 Alfred Schack Recuperator for gaseous media
DE2437016A1 (en) * 1974-08-01 1976-02-19 Hochtemperatur Reaktorbau Gmbh Circular cross-section heat exchanger - having series of concentric annular straight tubes bundles with annular collectors and distributors
EP0049677B1 (en) 1980-10-03 1986-04-30 Alsa Méca, Sàrl, Société dite Device for the transformation of ligneous waste materials, particularly of wood waste, into combustible granules of small diameters, and granules obtained with this device
NL9100606A (en) * 1991-04-08 1992-11-02 Vandenbroek Int Bv DRYING DEVICE.
DK18793D0 (en) * 1993-02-18 1993-02-18 Bjoern Kamp Gulddal THERMOSTAT
WO1998011383A2 (en) * 1996-09-09 1998-03-19 Siemens Aktiengesellschaft Process and device for burning fuel in air
AT405644B (en) * 1996-09-26 1999-10-25 Andritz Patentverwaltung METHOD FOR INDIRECTLY HEATED DRYING OF GOODS, ESPECIALLY SLUDGE
EP0854337A1 (en) * 1997-01-16 1998-07-22 René Besnard Apparatus for drying crop material
RU2153640C1 (en) * 1999-10-27 2000-07-27 Скроцкая Ольга Пантелеймоновна Drying complex and method of wood drying
DE10011177A1 (en) * 2000-03-08 2001-09-20 Valmet Panelboard Gmbh Drying of wood particles as chips or fibers and the like has an initial drying stage partially heated by cleaned exhaust gas from the main drier where hot gases are the drying medium from a combustion chamber
DE10027278A1 (en) * 2000-05-31 2001-12-06 Inst Tech Trocknung Mbh Animal feed ingredients dried in drum with heat drawn via a heat exchanger located between firing unit and drying drum
IT249409Y1 (en) * 2000-08-08 2003-05-07 Piovan Spa AIR-AIR HEAT EXCHANGER STRUCTURE PARTICULARLY FOR GRANULAR PLASTIC DRYERS FOR MOLDING.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007147961A2 *

Also Published As

Publication number Publication date
DK2038598T3 (en) 2012-03-05
WO2007147961A2 (en) 2007-12-27
ATE543062T1 (en) 2012-02-15
FR2902866B1 (en) 2008-10-10
FR2902866A1 (en) 2007-12-28
US8011113B2 (en) 2011-09-06
RU2009101906A (en) 2010-07-27
WO2007147961A3 (en) 2008-03-20
RU2444688C2 (en) 2012-03-10
CA2655649A1 (en) 2007-12-27
EP2038598B1 (en) 2012-01-25
US20100162587A1 (en) 2010-07-01
BRPI0713687A2 (en) 2012-11-06
PL2038598T3 (en) 2012-07-31

Similar Documents

Publication Publication Date Title
EP2038598B1 (en) Hot gas generator and drying or dehydratiion installation employing such a generator
EP2084454B1 (en) Boiler burner for solid fuels of the biomass or tyre type and boiler comprising such burner
US20100089295A1 (en) Continuously-Fed Non-Densified Biomass Combustion System
FR2564747A1 (en) METHOD AND MEANS FOR CONTROLLING THE OPERATION OF A RECYCLED FLUIDIZED BED REACTOR
CA2785495A1 (en) Method and facility for drying pasty materials, in particular sludge from wastewater treatment plants and generation of thermal energy
EP2142871A2 (en) Process for the heat treatment of a material and heat treatment unit employing such a process
FR2854887A1 (en) Thermal recycling system suitable for waste material with high water content has thermopyrolysis. solid and gas combustion systems and heat exchanger with condenser
EP0350388B1 (en) Hot water generator
FR2964114A1 (en) SYSTEM AND METHOD FOR GASIFYING BIOMASS PRODUCTS
FR2622958A1 (en) COMPACT COMBUSTION APPLIANCES
EP0395457B1 (en) Process and apparatus for heating a flow of a gaseous fluid by successive heat exchanges
FR2516592A1 (en) COMBINED CYCLE POWER PLANT
EP0198758B1 (en) Furnace for refuse and auxiliary fuel and its operation
EP2260192B1 (en) Device for producing energy from biomass
EP1498657A1 (en) Heating boiler for granulated fuel
FR2580785A1 (en) Fore-hearth for burning solid fuels
FR2539586A1 (en) Dehydration accelerator which can be fitted on a cereal drier operating with a boiler having biofuels
FR2913724A1 (en) Hot fume utilizing method for producing mechanical energy, involves sending working gas i.e. air, from outlet of heat exchanger in direction of inlet of expansion stage of turbocharger to provide mechanical energy at level of shaft
FR2723429A1 (en) Method of burner combustion using chopped damp wood fuel
FR2520375A1 (en) Modular gasification appts. for combustible materials - such as garbage on straw, using towers for combustion, steam generation, and washing of gases
FR2548337A3 (en) Catalytic hot-air generator, in particular for closed rooms
BE614555A (en)
FR2510236A1 (en) Incinerator acting as boiler - double walled cylinder containing heating coil and tank on top mounting over feed opening
FR2608736A1 (en) Central heating boiler burning solid fuel
BE461284A (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20090122

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20110307

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 543062

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120215

Ref country code: CH

Ref legal event code: NV

Representative=s name: ING. MARCO ZARDI C/O M. ZARDI & CO. S.A.

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007020293

Country of ref document: DE

Effective date: 20120322

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: RO

Ref legal event code: EPE

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20120125

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20120125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120425

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120525

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20120525

Year of fee payment: 6

Ref country code: DK

Payment date: 20120524

Year of fee payment: 6

Ref country code: DE

Payment date: 20120524

Year of fee payment: 6

Ref country code: TR

Payment date: 20120531

Year of fee payment: 6

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120525

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120426

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20120605

Year of fee payment: 6

Ref country code: FI

Payment date: 20120524

Year of fee payment: 6

Ref country code: GB

Payment date: 20120525

Year of fee payment: 6

Ref country code: SE

Payment date: 20120525

Year of fee payment: 6

Ref country code: RO

Payment date: 20120618

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BERE Be: lapsed

Owner name: NEXTER MUNITIONS

Effective date: 20120630

26N No opposition filed

Effective date: 20121026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120630

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007020293

Country of ref document: DE

Effective date: 20121026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20120524

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120630

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130619

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20130630

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 543062

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130618

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130618

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130618

Ref country code: RO

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130618

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602007020293

Country of ref document: DE

Effective date: 20140101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130618

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130630

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130618

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120618

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070618

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130630

REG Reference to a national code

Ref country code: PL

Ref legal event code: LAPE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130618

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20140620

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130618

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150630