EP4445071A1 - Waermeuebertragerelement und dessen verwendung - Google Patents
Waermeuebertragerelement und dessen verwendungInfo
- Publication number
- EP4445071A1 EP4445071A1 EP22813248.6A EP22813248A EP4445071A1 EP 4445071 A1 EP4445071 A1 EP 4445071A1 EP 22813248 A EP22813248 A EP 22813248A EP 4445071 A1 EP4445071 A1 EP 4445071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- fluidized bed
- inlet
- upper distributor
- exchanger tubes
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
- F22B31/0023—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type with tubes in the bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/084—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D13/00—Heat-exchange apparatus using a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially-straight water tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
- F22B21/341—Vertical radiation boilers with combustion in the lower part
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0061—Constructional features of bed cooling
Definitions
- the invention relates to a fluidized bed with a heat exchanger, comprising a fluidized bed wall, the heat exchanger comprising at least one heat exchanger element and the heat exchanger element further comprising a horizontal inlet, a horizontal outlet, vertical heat exchanger tubes, a lower horizontal collector, the vertical heat exchanger tubes having at their lower end with are connected to the lower header and the lower header is connected to the outlet, an upper horizontal manifold, wherein the vertical heat exchanger tubes are connected at their upper end to the upper manifold and the upper manifold is connected to the inlet.
- the invention also relates to the use of the heat exchanger element according to the invention.
- Heat exchangers with vertical tubes are characterized, for example, by good accessibility and cleanability, but especially when operating with steam as the heat transfer medium.
- the steam is added to the heat exchanger in the upper area of the heat exchanger via an inlet and the mixture of steam and condensate is removed via an outlet in the lower area of the heat exchanger.
- the heat exchanger is typically arranged in a fluidized bed, with the inlet and outlet being guided through the wall of the fluidized bed.
- a heat exchanger with vertical tubes is shown, for example, in FIG. 1 of AT 405 685 B.
- WO 2012 163 961 discloses a steam generator with steam boilers which have riser pipes.
- the steam boiler includes a heat exchanger, wherein feed water is supplied to the heat exchanger via a feed water supply in the lower area of the heat exchanger. The feed water rises in the pipes of the heat exchanger and is added to the riser pipe in the upper area.
- a drain valve via which the system can be emptied, is also arranged in the lowest area of a connecting pipe, which is connected to the riser pipe.
- the aim of the invention is a heat exchanger or a heat exchanger element which has an advantageous condensate transport in the direction of gravity or an advantageous dewatering behavior, but is not limited in terms of overall height.
- a vertical riser pipe is arranged between the inlet and the upper distributor, the riser pipe connecting the inlet and the upper distributor and the riser pipe being designed in such a way that the inlet is arranged closer to the outlet than to the upper distributor, wherein the inlet and outlet are guided through the fluidized bed wall and the riser pipe, the upper distributor, the lower collector and the vertical heat exchanger tubes are arranged within the fluidized bed wall.
- the outlet, lower header and the lower ends of the heat exchanger tubes are arranged below the inlet, upper distributor and the upper ends of the heat exchanger tubes.
- a heat transfer medium for example steam
- the heat transfer through the riser is comparatively negligible because the riser has a negligible surface area compared to the plurality of heat exchanger tubes.
- the heat transfer medium is distributed over the heat exchanger tubes and flows downwards through them. Any condensation or condensate that occurs is advantageously transported downwards in the direction of gravity to the lower collector, which is advantageous with regard to the pressure loss that occurs in the heat exchanger element.
- the removal of the heat transfer medium or any condensate continues through the drain.
- the riser pipe allows outlet and inlet to be arranged closer to one another, ie so that in particular the inlet is arranged closer to the outlet than the upper distributor, the Stress of the heat exchanger element can be reduced.
- the distance between the inlet and outlet is particularly decisive for the stress due to different thermal expansions of the surrounding wall and the heat exchanger element.
- the heat exchanger element according to the invention thus allows the realization of significantly greater overall heights compared to the prior art.
- the invention synergistically allows an advantageous pressure drop or dewatering behavior and an advantageous stress on the heat exchanger element.
- the lower collector and the upper distributor of the heat exchanger element are designed as a tube.
- the design as a tube is particularly easy and inexpensive to implement.
- the lower collector and the upper distributor are advantageously arranged horizontally, which is advantageous with regard to the pressure loss that occurs, in particular when condensation occurs.
- connection area of the upper distributor and the vertical heat exchanger tubes it is also preferable to use reinforcing elements, e.g. LI-shaped sleeves or caps, in the connection area of the upper distributor and the vertical heat exchanger tubes to protect against abrasion.
- the connection area of the upper distributor and the vertical heat exchanger tubes is realized, for example, by welding or soldering. By using reinforcement elements in the sensitive connection area, the connection area can be protected against abrasion.
- a heat exchanger element with a ratio of the hydraulic diameter of the upper distributor to the hydraulic diameter of one of the heat exchanger tubes of less than 2.5 and preferably less than 1.5. If several heat exchanger elements are combined to form one heat exchanger and in order to obtain heat exchangers with the highest possible packing density, it is important that the individual heat exchanger elements have sufficiently slim dimensions. This is made possible by advantageous dimensioning of the upper distributor, with the hydraulic diameter being formed as the quotient of the area through which flow occurs and the circumference of the area through which flow occurs.
- An advantageous embodiment is characterized in that flow elements, eg throttles, screens, valves, flaps, etc., are arranged between the upper distributor and the vertical heat exchanger tubes to influence the flow through the heat exchanger tubes.
- the heat transfer medium is fed to the heat exchanger tubes via the upper distributor, with the distribution of the heat transfer medium following the pressure distribution in the upper distributor.
- flow elements are advantageously arranged between the upper distributor and the heat exchanger tubes, which have a balancing effect on the local pressure or flow.
- At least one heat exchanger element forms a heat exchanger for a fluidized bed dryer, with two or more heat exchanger elements particularly preferably also forming the heat exchanger.
- the heat exchanger elements can be arranged parallel to one another. Especially in fluidized bed applications, this allows fewer deposits on the heat exchanger than, for example, in heat exchangers with horizontal coils.
- a fluidized bed with a fluidized bed wall and heat exchanger with heat exchanger elements is included, with the inlet and outlet being guided through the fluidized bed wall, the vertical heat exchanger tubes being arranged vertically, i.e. perpendicularly, and the riser tube, the upper distributor, the lower collector and the vertical heat exchanger tubes within the Fluidized bed wall are arranged.
- the riser pipe connecting the inflow and the upper distributor and the riser pipe being designed in such a way that the inlet is arranged closer to the outlet than to the upper distributor the effect of the invention.
- the invention also relates to the use of a heat exchanger in a fluidized bed with steam as the heat transfer medium.
- a heat exchanger in a fluidized bed with steam as the heat transfer medium.
- condensing media - such as steam -
- the heat exchanger according to the invention has an advantageous effect, such as low pressure loss and optimal drainage properties.
- FIG. 1 shows a heat exchanger element according to the invention.
- Fig. 1 shows a heat exchanger element 1 with an inlet 2, an outlet 3, vertical heat exchanger tubes 4, a lower header 5, the vertical heat exchanger tubes 4 being connected at their lower end to the lower header 5 and the lower header 5 to the outlet 3 is connected, an upper distributor 6, wherein the vertical heat exchanger tubes 4 are connected at their upper end to the upper distributor 6 and the upper distributor 6 is connected to the inlet 2.
- a vertical riser pipe 7 is arranged between the inlet 2 and the upper distributor 6, with the riser pipe 7 connecting the inlet 2 and the upper distributor 6 and with the riser pipe 7 being designed in such a way that the inlet 2 is closer to the outlet 3 than on the upper distributor 6 is arranged.
- the present invention offers numerous advantages.
- the heat exchanger element according to the invention effectively reduces the stress on the heat exchanger element and allows greater overall heights to be implemented. At the same time, the heat exchanger element according to the invention allows an advantageous pressure drop or an optimal drainage behavior.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50982/2021A AT524791B1 (de) | 2021-12-09 | 2021-12-09 | Waermeuebertragerelement und dessen verwendung |
| PCT/EP2022/080725 WO2023104401A1 (de) | 2021-12-09 | 2022-11-03 | Waermeuebertragerelement und dessen verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4445071A1 true EP4445071A1 (de) | 2024-10-16 |
Family
ID=83230832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22813248.6A Pending EP4445071A1 (de) | 2021-12-09 | 2022-11-03 | Waermeuebertragerelement und dessen verwendung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250035302A1 (de) |
| EP (1) | EP4445071A1 (de) |
| CN (1) | CN118318129A (de) |
| AT (1) | AT524791B1 (de) |
| CA (1) | CA3239137A1 (de) |
| WO (1) | WO2023104401A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1085634B (de) * | 1954-11-16 | 1960-07-21 | Combustion Eng | Verfahren zur indirekten Erhitzung eines durch eine Leitung gefuehrten Mediums |
| DE3233959A1 (de) | 1982-09-14 | 1984-03-15 | Bergwerksverband Gmbh, 4300 Essen | Wirbelbettreaktor mit waermeaustauschrohren |
| US5123480A (en) * | 1991-08-05 | 1992-06-23 | Riley Stoker Corporation | Integrated heat exchanger |
| AT405685B (de) * | 1996-04-17 | 1999-10-25 | Andritz Patentverwaltung | Wärmetauscher |
| WO2012100438A1 (zh) * | 2011-01-30 | 2012-08-02 | Chen Yuqi | 以流沙为工作介质的太阳能储热及高温气体产生系统 |
| AT511485B1 (de) * | 2011-05-30 | 2013-09-15 | Klaus Ing Voelkerer | Dampferzeuger mit einem brennraum, zumindest einem rauchgaskanal und einer kesselbaugruppe |
| CN106052308B (zh) * | 2016-06-15 | 2018-11-13 | 成都昊特新能源技术股份有限公司 | 一种利用汽机乏汽的干燥系统以及干燥方法 |
-
2021
- 2021-12-09 AT ATA50982/2021A patent/AT524791B1/de active
-
2022
- 2022-11-03 CN CN202280078862.9A patent/CN118318129A/zh active Pending
- 2022-11-03 EP EP22813248.6A patent/EP4445071A1/de active Pending
- 2022-11-03 WO PCT/EP2022/080725 patent/WO2023104401A1/de not_active Ceased
- 2022-11-03 CA CA3239137A patent/CA3239137A1/en active Pending
- 2022-11-03 US US18/711,157 patent/US20250035302A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN118318129A (zh) | 2024-07-09 |
| CA3239137A1 (en) | 2023-06-15 |
| AT524791A4 (de) | 2022-09-15 |
| US20250035302A1 (en) | 2025-01-30 |
| WO2023104401A1 (de) | 2023-06-15 |
| AT524791B1 (de) | 2022-09-15 |
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Legal Events
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