EP2598808A2 - Boiler with substantially vertical fire tubes, particularly for domestic heating - Google Patents

Boiler with substantially vertical fire tubes, particularly for domestic heating

Info

Publication number
EP2598808A2
EP2598808A2 EP11724197.6A EP11724197A EP2598808A2 EP 2598808 A2 EP2598808 A2 EP 2598808A2 EP 11724197 A EP11724197 A EP 11724197A EP 2598808 A2 EP2598808 A2 EP 2598808A2
Authority
EP
European Patent Office
Prior art keywords
substantially vertical
tube plate
boiler
tubes
furnace
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
EP11724197.6A
Other languages
German (de)
French (fr)
Other versions
EP2598808B1 (en
Inventor
Giuseppe De Santi
Sergio Fiorani
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.)
Unical AG SpA
Original Assignee
Unical AG SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unical AG SpA filed Critical Unical AG SpA
Publication of EP2598808A2 publication Critical patent/EP2598808A2/en
Application granted granted Critical
Publication of EP2598808B1 publication Critical patent/EP2598808B1/en
Active 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/287—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F24D2200/043—More than one gas or oil fired boiler

Definitions

  • the invention relates to a boiler with substantially vertical fire tubes, particularly for domestic heating.
  • fire tube one of the most common constructive forms of boilers, and particularly of those for heating water intended to supply domestic sanitary and heating systems, is the one known as "fire tube", and there are two types of said constructive form: a first type, in which the fire tubes are arranged substantially horizontally, and a second type, in which said tubes are arranged substantially vertically.
  • the present invention relates to boilers of the second type, which comprise a skirt designed to contain the water to be heated, which is provided, at the top, with a furnace whose base is shaped like a flat tube plate, from which a plurality of substantially vertical tubes extend, such tubes being immersed in the water to be heated and conveying the exhaust gases produced in the furnace to a chamber for collection and conveyance to the stack, which is located at the base of the skirt.
  • the aim of the present invention is to provide a boiler with substantially vertical fire tubes, such as to avoid the formation of bubbles in the water in contact with the tube plate.
  • This aim is achieved by a boiler with substantially vertical fire tubes, particularly for domestic heating, according to the invention, characterized in that it comprises the features disclosed in the appended claims.
  • Figure 1 is a sectional view of a boiler according to the background art
  • Figure 2 is a similar sectional view of a boiler according to the invention.
  • Figure 3 is a sectional view of two boilers according to the invention, installed in parallel.
  • the numeral 1 generally designates a boiler with substantially vertical fire tubes, particularly for domestic heating, manufactured according to the background art, comprising a skirt 2 for containing water 3 to be heated, with connectors 2a, 2b respectively for inflow and outflow, provided at the top with a furnace 4 in which the flame produced by a burner 5 forms.
  • the furnace 4 has a base that is shaped so as to form a flat tube plate, from which a plurality of substantially vertical tubes (7) extend, such tubes being immersed in the water 3 to be heated and conveying the exhaust gases produced in the furnace 4 to a chamber 8 for collection and conveyance to the stack which is located at the base of the skirt 2.
  • the tube plate 6 of the background art is arranged horizontally, and this fact causes stagnation of the water in contact with such plate, which causes the formation of bubbles 9.
  • Figure 2 is a sectional view of a boiler 10 according to the invention, which again comprises the skirt 2 for containing water 3 to be heated, with connectors 2a, 2b respectively for inflow and outflow, which is provided at the top with a furnace 4 with a burner 5.
  • Substantially vertical tubes 1 1 designed to convey the exhaust gases produced in the furnace 4 to a collection chamber 8 extend from a flat tube plate 12 which is arranged at the base of the furnace 4 and which, according to an important feature of the invention, is inclined sufficiently to allow the natural circulation of the water in contact with said plate, as indicated by the arrows in Figure 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)
  • Incineration Of Waste (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

A boiler (10) with substantially vertical fire tubes, particularly for domestic heating, comprising a skirt (2) for containing the water (3) to be heated, which is provided at the top with a furnace (4) which has a base that is shaped so as to define a flat tube plate (12), and a plurality of substantially vertical tubes (1 1) that extend from said tube plate (12) and convey the exhaust gases produced in the furnace (4) to a collection chamber (8) arranged proximate to the base of the skirt (2), the flat tube plate (12) being inclined sufficiently to allow the natural circulation of the water in contact with it, thus avoiding any possibility of stagnation.

Description

BOILER WITH SUBSTANTIALLY VERTICAL FIRE TUBES, PARTICULARLY FOR DOMESTIC HEATING
Technical Field
The invention relates to a boiler with substantially vertical fire tubes, particularly for domestic heating.
Background art
It is known that one of the most common constructive forms of boilers, and particularly of those for heating water intended to supply domestic sanitary and heating systems, is the one known as "fire tube", and there are two types of said constructive form: a first type, in which the fire tubes are arranged substantially horizontally, and a second type, in which said tubes are arranged substantially vertically.
The present invention relates to boilers of the second type, which comprise a skirt designed to contain the water to be heated, which is provided, at the top, with a furnace whose base is shaped like a flat tube plate, from which a plurality of substantially vertical tubes extend, such tubes being immersed in the water to be heated and conveying the exhaust gases produced in the furnace to a chamber for collection and conveyance to the stack, which is located at the base of the skirt.
In conventional boilers, the flat tube plate that is located at the base of the furnace is arranged horizontally, and this fact causes a stagnation of the water in contact with such plate, which causes as a consequence the presence of bubbles, which form due to localized boiling and are destined to implode on contact with the incoming cold water, causing unacceptable noise: moreover, difficulties in balancing operation arise, particularly in case of boilers installed in parallel.
Disclosure of the invention
The aim of the present invention is to provide a boiler with substantially vertical fire tubes, such as to avoid the formation of bubbles in the water in contact with the tube plate. This aim is achieved by a boiler with substantially vertical fire tubes, particularly for domestic heating, according to the invention, characterized in that it comprises the features disclosed in the appended claims.
Brief description of the drawings
Further characteristics and advantages of the boiler according to the present invention will become better apparent from the description of a preferred but not exclusive embodiment thereof, illustrated by way of non- limiting example in the accompanying drawings, wherein:
Figure 1 is a sectional view of a boiler according to the background art;
Figure 2 is a similar sectional view of a boiler according to the invention;
Figure 3 is a sectional view of two boilers according to the invention, installed in parallel.
Ways of carrying out the invention
With reference to Figure 1 , the numeral 1 generally designates a boiler with substantially vertical fire tubes, particularly for domestic heating, manufactured according to the background art, comprising a skirt 2 for containing water 3 to be heated, with connectors 2a, 2b respectively for inflow and outflow, provided at the top with a furnace 4 in which the flame produced by a burner 5 forms.
The furnace 4 has a base that is shaped so as to form a flat tube plate, from which a plurality of substantially vertical tubes (7) extend, such tubes being immersed in the water 3 to be heated and conveying the exhaust gases produced in the furnace 4 to a chamber 8 for collection and conveyance to the stack which is located at the base of the skirt 2.
As mentioned earlier, the tube plate 6 of the background art is arranged horizontally, and this fact causes stagnation of the water in contact with such plate, which causes the formation of bubbles 9.
Figure 2 is a sectional view of a boiler 10 according to the invention, which again comprises the skirt 2 for containing water 3 to be heated, with connectors 2a, 2b respectively for inflow and outflow, which is provided at the top with a furnace 4 with a burner 5.
Substantially vertical tubes 1 1 designed to convey the exhaust gases produced in the furnace 4 to a collection chamber 8 extend from a flat tube plate 12 which is arranged at the base of the furnace 4 and which, according to an important feature of the invention, is inclined sufficiently to allow the natural circulation of the water in contact with said plate, as indicated by the arrows in Figure 2.
Any possibility of stagnation of the water in contact with the tube plate 12 is thus avoided, and any possibility of bubble formation is consequently excluded; the boiler according to the invention thus no longer has any noise problem typical of the background art, and balancing of operation is facilitated, particularly in case of boilers installed in parallel, such as the ones designated by the reference numerals 13 and 14 in Figure 3, Finally, it should be noted that the exhaust gas conveyance tubes 1 1 are fixed to the tube plate 12 so as to be perpendicular thereto.
The described invention is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements.
The disclosures in Italian Patent Application No. MI2010A001416 from which this application claims priority are incorporated herein by reference.
Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A boiler (10) with substantially vertical fire tubes, particularly for domestic heating, comprising a skirt (2) for containing water (3) to be heated, which is provided at the top with a furnace (4) which has a base that is shaped so as to define a flat tube plate (12), and a plurality of substantially vertical tubes (11) that extend from said tube plate (12) and convey the exhaust gases produced in the furnace (4) to a collection chamber (8) arranged proximate to the base of the skirt (2), characterized in that said flat tube plate (12) is inclined sufficiently to allow the natural circulation of the water in contact with it, thus avoiding any possibility of stagnation.
2. The boiler according to claim 1 , characterized in that the exhaust gas conveyance tubes (1 1) are fixed to the tube plate (12) so as to be perpendicular thereto.
EP11724197.6A 2010-07-29 2011-06-08 Boiler with substantially vertical fire tubes, particularly for domestic heating Active EP2598808B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A001416A IT1401484B1 (en) 2010-07-29 2010-07-29 BOILER WITH SMALLLY VERTICAL SMOKE PIPES, PARTICULARLY FOR DOMESTIC HEATING.
PCT/EP2011/059466 WO2012013405A2 (en) 2010-07-29 2011-06-08 Boiler with substantially vertical fire tubes, particularly for domestic heating

Publications (2)

Publication Number Publication Date
EP2598808A2 true EP2598808A2 (en) 2013-06-05
EP2598808B1 EP2598808B1 (en) 2015-07-08

Family

ID=43498593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11724197.6A Active EP2598808B1 (en) 2010-07-29 2011-06-08 Boiler with substantially vertical fire tubes, particularly for domestic heating

Country Status (3)

Country Link
EP (1) EP2598808B1 (en)
IT (1) IT1401484B1 (en)
WO (1) WO2012013405A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2867592T3 (en) 2012-05-13 2018-09-28 Aerco International, Inc. Water heating apparatus with parallel heat exchangers
US10704802B2 (en) 2012-05-13 2020-07-07 Aerco International, Inc. Water heating apparatus with parallel heat exchangers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB250055A (en) * 1925-06-04 1926-04-08 William Donald An improved liquid heating apparatus
EP0262274A1 (en) * 1986-09-22 1988-04-06 Emile Percevaut Recuperator of heat from flue gases from different furnaces capable of cleaning these gases
US5775268A (en) * 1996-04-24 1998-07-07 Pvi Industries, Inc. High efficiency vertical tube water heater apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012013405A2 *

Also Published As

Publication number Publication date
EP2598808B1 (en) 2015-07-08
WO2012013405A3 (en) 2012-04-05
WO2012013405A2 (en) 2012-02-02
ITMI20101416A1 (en) 2012-01-30
IT1401484B1 (en) 2013-07-26

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