EP4357713A1 - Doppelversorgungssystem für öfen - Google Patents

Doppelversorgungssystem für öfen Download PDF

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Publication number
EP4357713A1
EP4357713A1 EP23204567.4A EP23204567A EP4357713A1 EP 4357713 A1 EP4357713 A1 EP 4357713A1 EP 23204567 A EP23204567 A EP 23204567A EP 4357713 A1 EP4357713 A1 EP 4357713A1
Authority
EP
European Patent Office
Prior art keywords
inlet opening
occlusion means
selective occlusion
air
oven
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.)
Pending
Application number
EP23204567.4A
Other languages
English (en)
French (fr)
Inventor
Piattelli Andrea
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.)
Unitech Industries Srl
Original Assignee
Unitech Industries Srl
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 Unitech Industries Srl filed Critical Unitech Industries Srl
Publication of EP4357713A1 publication Critical patent/EP4357713A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases or liquids

Definitions

  • the present invention concerns a dual supply system for ovens.
  • the present invention concerns a dual supply system for ovens with different possible configurations of use in relation to specific production needs.
  • Some non-limiting examples of such equipment are textile dryers and stenters, which typically include a tunnel-shaped oven through which the product to be treated is passed: a flow of hot recirculation air passes inside the oven, having a temperature suitable for the specific type of treatment to be carried out.
  • the aforementioned equipment usually also includes an oven supply system, which heats the air flow to carry out the treatment.
  • Some of the aforementioned supply systems are of the combined type, that is, they are configured to heat the air flow using several energy sources operating together. This choice is dictated by the need to have a supply system that is as flexible and versatile as possible, capable of meeting different operational needs efficiently, with particular attention also to the aspect of resource optimization, and therefore of the energy consumption of the equipment.
  • the combined system includes a burner and a steam-powered exchanger/battery.
  • the different heating devices, or exchangers are positioned in sequence, i.e. one after the other, with reference to the direction of the air flow that passes through the oven.
  • This configuration of the power system, and therefore this arrangement of the heating/exchanger devices allows, in some cases, to operate both devices simultaneously, so as to therefore operate in series, in the case of high energy demands.
  • the operation of the two devices can, of course, be appropriately regulated so as to dose the thermal power generated by each of them, in relation to the effect one intends to obtain inside the oven.
  • this positioning, in sequence, of the two different heating/exchanger devices is often penalizing from the point of view of maintenance and cleaning, since these devices are preferably installed close to each other (especially in the case combined systems that do not require the use of a burner are used).
  • the technical aim of the present invention is to improve the state of the art in the field of supply systems for ovens.
  • Another object of the present invention is to create a dual supply system for ovens which allows solving the compatibility problems between the different heating/exchanger devices which afflict known systems.
  • the system according to the invention includes a substantially box-shaped element, which can be associated with an inlet mouth of an oven, with which it is placed in fluid communication.
  • the substantially box-shaped element includes a first inlet opening and a second inlet opening, for respective air flows directed towards the inside of the oven.
  • the system also includes at least one burner, powered by gas, or LPG, or diesel, positioned so as to intercept the flow of air entering through the first inlet opening of the substantially box-shaped element.
  • at least one burner powered by gas, or LPG, or diesel, positioned so as to intercept the flow of air entering through the first inlet opening of the substantially box-shaped element.
  • the system also includes at least one heat exchanger, positioned so as to intercept the flow of air entering through the second inlet opening of the substantially box-shaped element.
  • the system also includes first selective occlusion means of the first inlet opening, and second selective occlusion means of the second inlet opening.
  • both the burner and the heat exchanger are operational, and the air enters the oven duct both through the first inlet opening and through the second inlet opening.
  • both the first selective occlusion means and the second selective occlusion means are inactive (i.e. removed from the supply system).
  • the air enters the oven duct through the first inlet opening, and intercepts the burner since the first selective occlusion means are inactive, while the second selective occlusion means are active, and prevent the entry of air through the second opening.
  • a third configuration of use of the system also characterized by a single supply
  • only the heat exchanger is operational; the air enters the oven duct through the second inlet opening, since the second selective occlusion means are inactive, while the first selective occlusion means prevent the entry of air through the second opening.
  • the dual supply system solution according to the invention allows the burner or the heat exchanger to be used in certain production situations as an alternative to each other (in the second and third use configurations respectively).
  • both devices can also be used simultaneously (in the first use configuration).
  • the solution according to the present invention is advantageous from multiple points of view, as will be seen below.
  • the reference number 1 generally indicates a dual supply system for ovens according to the present invention.
  • the system 1 according to the present invention can be associated with ovens F of industrial equipment of any type, without specific limitations.
  • the system can be associated with the oven F of an equipment in the textile field, such as dryers, stenters, or similar.
  • FIG 1 shows an oven F (for example the oven of an equipment in the textile field) in which at least one system 1 according to the present invention is installed.
  • an oven F for example the oven of an equipment in the textile field
  • the oven F includes two coupled M modules, but which can also work individually.
  • a duct C is installed, for supplying the air which enters through the system 1 according to the invention, so as to convey it towards the product treatment areas.
  • the system 1 includes a substantially box-shaped element 2.
  • the substantially box-shaped element 2 can be associated with the inlet mouth 3 of the air supply duct C inside the oven F, with which it is in fluid communication.
  • the supply duct C includes fans V which circulate the air in the area of the oven F (the upper one in figure 3 ) through which the products to be treated pass.
  • the substantially box-shaped element 2 includes a first inlet opening 4 and at least a second inlet opening 5, for respective (recirculation) air flows directed towards the inside of the oven F.
  • system 1 includes at least one burner 6, powered by gas, or LPG, or diesel (which constitutes the first type of fuel supply of system 1).
  • the burner 6 is associated with the substantially box-shaped element 2, so as to intercept the flow of air entering through the first inlet opening 4.
  • the system 1 also includes at least one heat exchanger 7, or battery (more in detail, a battery of tubes inside which a heating fluid flows); the exchanger 7 constitutes the second type of supply of system 1.
  • the exchanger 7 is associated with the substantially box-shaped element 2, so as to intercept the flow of air entering through the second inlet opening 5.
  • the system 1 includes first selective occlusion means 8 of the first inlet opening 4.
  • system 1 includes second selective occlusion means 9 of the at least one second inlet opening 5.
  • the features of the present invention, and in particular the first, second selective occlusion means 8, 9 allow the supply system 1 to be used in multiple configurations of use, and therefore with different supplying modes.
  • the air enters duct C both through the first inlet opening 4, intercepting the burner 6, and through the second inlet opening 5, intercepting the exchanger 7.
  • both the first selective occlusion means 8 and the second selective occlusion means 9 are inactive.
  • the recirculation air enters the duct C only through the first inlet opening 4 (since the first selective occlusion means 8 are inactive), and therefore intercepts the burner 6.
  • the second selective occlusion means 9 are instead active, and therefore they prevent the air from entering the oven F through the second inlet opening 5.
  • This second configuration of use therefore, can be used in production situations in which it is intended to exploit the peculiar characteristics of air heating obtained with burner 6, powered by gas, or LPG, or diesel (for example, the possibility of quickly reaching high air temperatures).
  • the at least one heat exchanger 7 is operational (further single power condition).
  • the recirculation air enters the duct C through the second inlet opening 5 (since the second selective occlusion means 9 are inactive), and therefore intercepts the exchanger 7.
  • the first selective occlusion means 8 are instead active, and therefore they prevent the air from entering the oven F through the first inlet opening 4.
  • This third configuration of use therefore, can be used in production situations in which it is intended to exploit the peculiar characteristics of air heating obtained with at least one heat exchanger 7 of a specific type.
  • the heat exchanger 7, or battery, of the system 1 according to the present invention can be of different types, in relation to the specific production needs.
  • the exchanger 7 can be of the type powered by oil, steam, superheated water, or other types, without limitations to the purposes of the present invention.
  • the substantially box-shaped element 2 includes a first wall 10.
  • this first wall 10 can be a front (or possibly rear) wall, with reference to the main direction of development of the oven F to which the system 1 is associated.
  • the burner 6 penetrates inside the volume enclosed by the substantially box-shaped element 2, which is, in turn, in fluid communication with the duct C.
  • the substantially box-shaped element 2 also includes at least a second wall 11.
  • At least a second wall 11 can be a side wall, with reference to the main direction of development of the oven F to which the system 1 is associated.
  • At least a second wall 11 can be perpendicular to the first wall 10.
  • the second inlet opening 5 is created in the at least one second wall 11.
  • the exchanger 7 is associated, with the substantially box-shaped element 2, at such second wall 11, in such a way as to be hit by the air flow which circulates inside the oven F and enters the duct C through the second inlet opening 5.
  • the substantially box-shaped element 2 also includes a third wall 12.
  • This third wall 12 can be an upper wall, with reference to the main direction of development of the oven F to which the system 1 is associated.
  • the third wall 12 can therefore be perpendicular to both the first wall 10 and the second wall 11.
  • the first inlet opening 4 is made in the third wall 12 of the substantially box-shaped element 2.
  • the system 1 comprises a first filter 13.
  • the first filter 13 can be associated, in a removable manner, with the first inlet opening 4.
  • the first filter 13 is therefore arranged, in use, along a horizontal plane.
  • the first filter 13 is preferably of the mesh type; it has the function of preventing impurities (such as fluff, fiber residues) or foreign bodies from entering the duct C through the first inlet opening 4.
  • the first filter 13 may include a handle portion, to be able to be inserted/extracted into/from the first inlet opening 4 (for example via sliding guides), for cleaning and maintenance reasons.
  • the system 1 comprises a second filter 14.
  • the second filter 14 can be associated, in a removable manner, with the second inlet opening 5.
  • the second filter 14 is therefore arranged, in use, according to a vertical plane.
  • the second filter 14 is preferably of the mesh type; it has the function of preventing impurities or foreign bodies from entering the duct C through the second inlet opening 5.
  • the second filter 14 may include a handle portion, to be able to be inserted/extracted into/from the second inlet opening 5 (for example via sliding guides), for cleaning and maintenance reasons.
  • the first selective occlusion means 8 comprise a first screen 15.
  • the first screen 15 can be associated, in a removable manner, with the first inlet opening 4.
  • the first screen 15 includes a solid body with a substantially laminar shape, which completely prevents the passage of air.
  • the first screen 15 slides along respective guides: it can be moved towards the center of the duct C, to open the first inlet opening 4 without the need to extract it.
  • the second selective occlusion means 9 comprise a second screen 16.
  • the second screen 16 can be associated, in a removable manner, with the second inlet opening 5.
  • the second screen 16 is hinged at the second inlet opening 5, and can be moved using a special handle 17, accessible from the outside of the oven F.
  • the second screen 16 is therefore mobile between a raised closing position of the second inlet opening 5, and a lowered opening position of the second inlet opening 5.
  • the second screen 16 includes a solid body with a substantially laminar shape, which completely prevents the passage of air.
  • both the burner 6 and the at least one exchanger 7 are operational (dual power supply active).
  • both the first selective occlusion means 8 and the second selective occlusion means 9 are inactive (i.e. the first screen 15 and the second screen 16 are removed, respectively, from the first inlet opening 4 and from the second inlet opening 5).
  • the first filter 13 and the second filter 14 are inserted respectively at the first inlet opening 4 and the second inlet opening 5, to prevent impurities from entering the duct C.
  • the second screen 16 (or each screen 16) is raised to occlude the second inlet opening 5 (or each inlet opening 5) so as to prevent the passage of air through it.
  • the recirculated air can enter the duct C of the oven F only through the first inlet opening 4, thus intercepting the burner 6.
  • the second screen 16 is lowered from the second inlet opening 5 (or each screen 16 from each inlet opening 5).
  • the first screen 15 is inserted at the first inlet opening 4, which prevents the passage of air through the aforementioned first inlet opening 4.
  • FIG. 10-14 Another embodiment of system 1 according to the invention is illustrated in figures 10-14 .
  • This embodiment differs from the previous one due to the conformation and configuration of the first and second selective occlusion means 8, 9.
  • the first selective occlusion means 8 comprise a first filter 13 and a second filter 15 which are extractable and constructionally similar, and therefore interchangeable with each other.
  • the second selective occlusion means 9 comprise a second filter 14 and a second filter 16 which are also extractable and constructionally similar, and therefore interchangeable with each other.
  • Figure 10 refers to the first configuration of use of the system 1 according to the invention, in which both the burner 6 and the exchanger 7 are operational (dual power supply active).
  • both the first selective occlusion means 8 and the second selective occlusion means 9 are inactive (i.e. the first screen 15 and the second screen 16 are removed, respectively, from the first inlet opening 4 and from the second inlet opening 5).
  • the first filter 13 and the second filter 14 are inserted respectively at the first inlet opening 4 and the second inlet opening 5, to prevent impurities from entering the oven.
  • FIGs 11 , 12 refer instead to two successive phases of the preparation of the system 1 in the second configuration of use, in which only the burner 6 is operational (single power supply condition).
  • the first filter 13 and the second filter 14 are removed respectively from the first inlet opening 4 and from the second inlet opening 5 (as indicated by the arrows).
  • the second screen 16 is inserted at the second inlet opening 5 (as indicated by the arrows), which prevents the passage of air through the aforementioned second inlet opening 5.
  • the recirculated air can enter the duct C of the oven F only through the first inlet opening 4, thus intercepting the burner 6.
  • FIGS 13 , 14 refer instead to two subsequent phases of the preparation of the system 1 in the third configuration of use, in which only the heat exchanger 7 is operational (further single power supply condition).
  • the first screen 15 is inserted at the first inlet opening 4, which prevents the passage of air through the aforementioned first inlet opening 4, while the second filter 14 is inserted at the second inlet opening 5 (as indicated by the arrows).
  • the recirculation air can enter the duct C of the oven F only through the second inlet opening 5, thus intercepting the exchanger 7.
  • the system 1 according to the invention therefore allows the heating of the oven F to be managed as needed, completely independently, without interference, without load losses and with a notable reduction in process energy costs, also eliminating any residual risk and/or contamination between the two heating devices.
  • the user can advantageously carry out both processes on the same system, in particular by operating with the second use configuration, in which only the burner 6 is operational: the burner 6, in fact, allows to reach the temperature of 200°C without any particular problems.
  • burner 6 instead of exchanger 7, allows the industrial plant (and therefore oven F) to function even during the third shift, in which steam is not available.
  • the system 1 therefore allows the use of a double supply system, maintaining the technical conditions of a single supply machine unchanged. Furthermore, the system 1 allows to obtain a high versatility of use without generating, for the same energy used, any load loss, and without penalizing the energy used/production ratio.
  • the system 1 does not present clogging problems greater than those of systems with a single battery or exchanger.
  • the system 1 also eliminates:
  • the system 1 according to the invention is also configured to switch in a very practical and quick way from one configuration to another (and therefore from one power system to another).
  • the system 1 can include two exchangers 7 (of the same type or different types) arranged symmetrically with respect to the burner 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Feeding And Controlling Fuel (AREA)
EP23204567.4A 2022-10-19 2023-10-19 Doppelversorgungssystem für öfen Pending EP4357713A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102022000021555A IT202200021555A1 (it) 2022-10-19 2022-10-19 Sistema a doppia alimentazione per forni

Publications (1)

Publication Number Publication Date
EP4357713A1 true EP4357713A1 (de) 2024-04-24

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ID=84943558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23204567.4A Pending EP4357713A1 (de) 2022-10-19 2023-10-19 Doppelversorgungssystem für öfen

Country Status (2)

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EP (1) EP4357713A1 (de)
IT (1) IT202200021555A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240787A (en) * 1979-06-19 1980-12-23 Jamaluddin Aziz A Drying oven with heat reclamation and air pollution control system
US4878839A (en) * 1987-09-08 1989-11-07 Ws Warmeprozesstechnik Gmbh Non-polluting hot gas generating system
US5375586A (en) * 1993-08-11 1994-12-27 Inter-City Products Corporation (Usa) Condensate isolator and drainage system for furnace
AU2020342698A1 (en) * 2019-09-03 2022-04-07 Sl-Technik Gmbh Biomass heating plant with optimised flue gas treatment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240787A (en) * 1979-06-19 1980-12-23 Jamaluddin Aziz A Drying oven with heat reclamation and air pollution control system
US4878839A (en) * 1987-09-08 1989-11-07 Ws Warmeprozesstechnik Gmbh Non-polluting hot gas generating system
US5375586A (en) * 1993-08-11 1994-12-27 Inter-City Products Corporation (Usa) Condensate isolator and drainage system for furnace
AU2020342698A1 (en) * 2019-09-03 2022-04-07 Sl-Technik Gmbh Biomass heating plant with optimised flue gas treatment

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Publication number Publication date
IT202200021555A1 (it) 2024-04-19

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