EP2149011A2 - Heissdampferzeuger, insbes. für eine thermische spritzmaschine - Google Patents
Heissdampferzeuger, insbes. für eine thermische spritzmaschineInfo
- Publication number
- EP2149011A2 EP2149011A2 EP08748946A EP08748946A EP2149011A2 EP 2149011 A2 EP2149011 A2 EP 2149011A2 EP 08748946 A EP08748946 A EP 08748946A EP 08748946 A EP08748946 A EP 08748946A EP 2149011 A2 EP2149011 A2 EP 2149011A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam generator
- hot steam
- generator according
- coil
- liquid
- 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
Links
- 238000007751 thermal spraying Methods 0.000 title claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 54
- 239000007788 liquid Substances 0.000 claims description 37
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009331 sowing Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- 241000512687 Anilius Species 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B27/00—Instantaneous or flash steam boilers
- F22B27/04—Instantaneous or flash steam boilers built-up from water tubes
- F22B27/08—Instantaneous or flash steam boilers built-up from water tubes bent helically, i.e. coiled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/282—Methods of steam generation characterised by form of heating method in boilers heated electrically with water or steam circulating in tubes or ducts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B11/00—Steam boilers of combined fire-tube type and water-tube type, i.e. steam boilers of fire-tube type having auxiliary water tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B27/00—Instantaneous or flash steam boilers
- F22B27/14—Instantaneous or flash steam boilers built-up from heat-exchange elements arranged within a confined chamber having heat-retaining walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
- F22G3/001—Steam tube arrangements not dependent of location
- F22G3/002—Steam tube arrangements not dependent of location with helical steam tubes
Definitions
- Hot steam generator esp. for a thermal spraying machine
- the invention relates to a hot steam generator, esp. For a thermal spraying machine.
- Hot steam generators belong today to the state of the art with a variety of different designs.
- Standard design is the shell boiler.
- liquid is vaporized on electrically heated rods or on flue gas trains fired with oil or gas and removed via a vapor space.
- fast steam generator in which a liquid is vaporized in a heated with gas or oil firing coil. In place of the coil are z.
- B also known designs in which the flow channel is formed by a circular ring with intervening helices, which in turn is heated by a furnace inside the tube.
- steam generators are known, the coil is poured together with a radiator in a metal block or the radiator with interchangeable Heating cartridges is provided.
- Especially in the field of small steam generators in the air conditioning and ironing steam generator are known in which liquid is sprayed onto a heated surface and evaporated there.
- the shell boiler with its pressurized amount of liquid and vapor has a significant hazard potential, which must be secured according to the Pressure Equipment Directive.
- the high-speed steam generator tends in pressure fluctuations entrain liquid droplets with the steam flow, resulting in an often undesirable wet steam, which must be laboriously reheated or dried via a liquid separator.
- a fast startup and shutdown cyclic steam extraction without cache should be possible by a fast startup and shutdown cyclic steam extraction without cache.
- a hot steam generator esp.
- a thermal spraying machine for generating superheated steam from a liquid, with a wound those heating coil, which may for example consist of several spiral or meandering wound, lying one inside the other pipe coils whose ends are connected to a closed flow channel and at the end or in the subsequent pipe system is at least one cross-sectional constriction, which flows through critically, ie at the speed of sound becomes.
- a narrowing with a variable cross section can also be used.
- the lying in the direction of steam outlet at the end of the flow channel of the pipe coil is subjected to a temperature far above the saturation temperature to achieve a direct overheating of the steam.
- the liquid can be evaporated in a relatively limited space and subsequently overheated.
- the heating coil is cast in a body made of a material or an alloy with a high thermal conductivity, preferably aluminum.
- heating elements are provided in the body according to an advantageous embodiment.
- These heating elements can advantageously consist of electric heating cartridges or flue gas pipes.
- the heating elements are cast according to an advantageous development in the body.
- bores for receiving the heating elements can be provided in the body, in which the heating elements can be inserted.
- the heating elements are preferably arranged annularly between the tube coils.
- temperature sensors are advantageously provided in the body, which can also regulate the temperature of the individual heating areas.
- the heating elements can also be wound around the pipe coils and be cast together with these in the body.
- the melting point of the material surrounding the heating coils is advantageously sufficiently below the melting point of the coils and above the maximum operating temperature.
- the heating coil can have a corrugated or ribbed inner surface. Furthermore, these geometries cause a sputtering of the liquid or a separation between entrained liquid and steam.
- the heating coil on its outside a support structure for the purpose of having in the casting.
- This support structure may preferably consist of a thoughtberippung.
- the cross section of the heating coil increases in the flow direction in order to achieve a longer residence time.
- the connections between possible individual sections of the heating coil can be formed as chambers, which cause a separation between entrained liquid and steam.
- the body is advantageously surrounded by insulation.
- outside the insulation can be arranged according to a preferred embodiment, an annular shell, which is flowed through by the liquid to be heated.
- the heat load of the environment can be minimized and, on the other hand, the supplied liquid can be preheated. This cooling or preheating can also be achieved if the outer coils are not heated directly.
- the body is cooled externally by the injected liquid.
- the heating coil is preferably connected upstream of a pump for supplying the liquid to be heated. Furthermore, the heating coil is a critically flowed through cross-sectional constriction, for example downstream of an exhaust valve. This has the advantage that the control of the system can be done exclusively by the pump, the degree of steam overheating and the set cross-sectional constriction on the steam side.
- the hot steam generator is preferably preheated and controlled to a temperature which is between the saturation temperature and the rewet temperature (Leidenfrosttemperatur) of the liquid in the operating state. By a suitable temperature control of the body, the area of the heating coil in Direction of the steam outflow further overheated to produce an absolutely dry superheated steam.
- the pump can operate continuously or pulsating, the latter leading to better evaporation in the two-phase flow area. With this management, a fast start-up and shutdown is achieved.
- the total volume of the heating coil does not exceed two liters, there is no risk to the environment due to breakage of the coiled tubing, even at maximum pressures.
- This can e.g. be achieved in that the narrowest cross-section is located directly at the end of the heating coil or that at the end of the heating coil a shut-off is provided, but whose cross-section must always be greater than the critically flowed through narrowest cross section in the further course of the steam line.
- the pressure is reduced abruptly after switching off the pump.
- the heating coil is depressurized in stand-by mode, which additionally increases the reliability.
- Figure 1 shows a cross section through the various coils of a hot steam generator according to the invention
- FIG. 2 shows a cross section through the heating steam generator according to the invention.
- a possible embodiment of a hot steam generator according to the invention is shown.
- hot steam generator is also an evaporator, in which the state of matter changes from liquid to gaseous, or a heater understood in which the state of aggregation is maintained.
- the media nitrogen, air, water, helium, hydrogen, etc., can be used.
- the hot steam generator consists in the illustrated embodiment of a heating coil 1 or a multi-part coil, which consists of a plurality of spirally wound, nested tube coils Ia, Ib, Ic, whose ends are connected to a closed flow channel.
- the individual coils Ia, Ib, Ic are interconnected in such a way that the liquid passes through the coils Ia, Ib, Ic from outside to inside.
- three coils Ia, Ib, Ic are provided so that the liquid can enter the outermost coil Ia and can escape from the innermost coil Ic.
- the heating coil 1 is cast in a preferably made of aluminum body 2. Instead of aluminum, a material or alloy with a high thermal conductivity can also be used.
- heating elements 3 are provided in the body. These heating elements 3 may consist of electric heating cartridges or flue gas pipes. They are also cast in the body 2. Alternatively, bores for receiving the heating elements 3 may be provided in the body 2, in which the heating elements 3 can be inserted.
- the heating elements 3 are preferably arranged annularly between the coils Ia, Ib, Ic.
- 2 temperature sensors 4 are provided in the body, which can also regulate the temperature of the individual coils Ia, Ib, Ic.
- the heating elements 3 can also be wound around the coils Ia, Ib, Ic and be cast together with these in the body 2.
- the melting point of the body 2 forming material is advantageously sufficiently below the melting point of the coils Ia, Ib, Ic and above the maximum operating temperature.
- the coils Ia, Ib, Ic can have a corrugated or ribbed inner surface.
- tube coils Ia, Ib, Ic may have on their outer side a support structure for anchoring in the body 2.
- This support structure can for example consist of an outer ribbing.
- the cross section of the coils Ia, Ib, Ic in the flow direction can increase in order to achieve a longer residence time of the liquid or the steamer.
- the connections between the individual coils Ia, Ib, Ic may be formed as chambers, which cause a separation between entrained liquid and steam.
- the body 2 is surrounded by insulation.
- annular jacket can be arranged, which is flowed through by the liquid to be heated.
- the heating coil 1 is connected upstream of a pump for supplying the liquid to be heated. Furthermore, the heating coil 1 is connected downstream of a cross-sectional constriction.
- the superheated steam generator is preferably preheated and controlled to a temperature which is between the saturation temperature and the rewet temperature (Leidenfrosttemperatur) of the liquid in the operating state.
- the area is traversed in the direction of the steam outflow of dry steam, which can be overheated there directly by a suitable temperature control of the body.
- the pump can operate continuously or pulsating, the latter leading to better evaporation in the two-phase flow area. With this management, a fast start-up and shutdown is achieved.
- the total volume of the heating coil 1 between water inlet and a suitable obturator at the end of the heating coil 1 does not exceed two liters, so there is no danger potential for the environment due to breakage of the tube coil Ia, Ib, Ic even at maximum pressures.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- General Induction Heating (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710017764 DE102007017764B4 (de) | 2007-04-16 | 2007-04-16 | Heißdammpferzeuger, insbesondere für eine thermische Spritzmaschine |
PCT/EP2008/003057 WO2008125358A2 (de) | 2007-04-16 | 2008-04-16 | Heissdampferzeuger, insbes. für eine thermische spritzmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2149011A2 true EP2149011A2 (de) | 2010-02-03 |
EP2149011B1 EP2149011B1 (de) | 2015-08-26 |
Family
ID=39767762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08748946.4A Active EP2149011B1 (de) | 2007-04-16 | 2008-04-16 | Heissdampferzeuger, insbesondere für eine thermische spritzmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2149011B1 (de) |
DE (1) | DE102007017764B4 (de) |
WO (1) | WO2008125358A2 (de) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE204691C (de) * | ||||
DE130168C (de) * | ||||
US3395676A (en) * | 1966-07-05 | 1968-08-06 | Babcock & Wilcox Co | Vapor generator |
US3563212A (en) * | 1969-08-27 | 1971-02-16 | Steam Engines Systems Corp | Vapor generator |
US4246871A (en) * | 1979-05-04 | 1981-01-27 | Bocksruker Ronald W | Steam generator |
DE3120682A1 (de) * | 1981-05-23 | 1982-12-16 | Horst 5241 Elben Hammes | Elektrisch beheizter zwangsdurchlauferhitzer |
US7080512B2 (en) * | 2004-09-14 | 2006-07-25 | Cyclone Technologies Lllp | Heat regenerative engine |
FR2878419B1 (fr) * | 2004-11-29 | 2007-01-19 | Seb Sa | Distributeur de boissons infusees comprenant une chaudiere amelioree et son procede de fabrication |
-
2007
- 2007-04-16 DE DE200710017764 patent/DE102007017764B4/de active Active
-
2008
- 2008-04-16 WO PCT/EP2008/003057 patent/WO2008125358A2/de active Application Filing
- 2008-04-16 EP EP08748946.4A patent/EP2149011B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008125358A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008125358A2 (de) | 2008-10-23 |
DE102007017764B4 (de) | 2014-04-17 |
DE102007017764A1 (de) | 2008-10-23 |
WO2008125358A3 (de) | 2012-03-01 |
EP2149011B1 (de) | 2015-08-26 |
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