EP3675598A1 - Générateur de vapeur électrique - Google Patents

Générateur de vapeur électrique Download PDF

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Publication number
EP3675598A1
EP3675598A1 EP17922300.3A EP17922300A EP3675598A1 EP 3675598 A1 EP3675598 A1 EP 3675598A1 EP 17922300 A EP17922300 A EP 17922300A EP 3675598 A1 EP3675598 A1 EP 3675598A1
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EP
European Patent Office
Prior art keywords
rods
turns
tubular
winding
steam generator
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.)
Withdrawn
Application number
EP17922300.3A
Other languages
German (de)
English (en)
Other versions
EP3675598A4 (fr
Inventor
Vladimir Mikhailovich SHIPILOV
Ayrat Albertovich FAZLYEV
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.)
Obschestvo S Ogranichennoi Otvetstvennostyu "parrus"
Original Assignee
Obschestvo S Ogranichennoi Otvetstvennostyu "b Plazma"
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Publication date
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Application filed by Obschestvo S Ogranichennoi Otvetstvennostyu "b Plazma" filed Critical Obschestvo S Ogranichennoi Otvetstvennostyu "b Plazma"
Publication of EP3675598A1 publication Critical patent/EP3675598A1/fr
Publication of EP3675598A4 publication Critical patent/EP3675598A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • 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
    • F22B1/281—Methods of steam generation characterised by form of heating method in boilers heated electrically other than by electrical resistances or electrodes

Definitions

  • the invention represents an electrical-to-thermal energy conversion and heat exchange maintenance device. It can be used during heating up liquids e.g., in systems of heating and hot steam-water supply systems of industrial and residential facilities, and in other cases requiring heat-up and vaporization of fluids.
  • Invention background includes electric steam generator involving electric transformer with stacked metal core intended for creation of a closed magnetic field, a primary winding located on the core and electrically insulated from it, a tubular secondary winding insulated within the magnetic field, a link externally connected to the tubular secondary winding turns to short-circuit the tubular secondary winding turns, and necessary aids for forcing liquid through the inner cavity of the tubular secondary winding.
  • the common device represents a highly efficient electrical-to-thermal energy conversion device due to the presence of a direct contact between liquid being heated up and the heating surface in the inner cavity of the short-circuited secondary tubular winding.
  • To enable steam generation in the common device it's necessary either to have the tubular winding heated above 212 degrees, or to preliminarily heat up the feed water prior to its forcing into the tubular winding.
  • the latter action is implemented by way of introduction an extra tubular short-circuited winding intended for pre-heating the liquid prior to its forcing into the main short0circuited tubular winding to enable vaporization. Quantity of thereby generated steam depends directly on the liquid flow rate.
  • Exceedance of the design flow rate through the device disables steam generation because of lack of evaporating energy, and the flow rate reduction below the design value entails insufficient cooling of the secondary tubular winding, and its overheating to the emergency value.
  • the common device version is highly efficient, it is too sensitive to control parameters such as amperage, voltage, feed water inlet temperature, flow rate since values of such parameters are subject to a particular design version.
  • Abnormal deviations in value of at least one parameter entail either quality deterioration of steam being generated by the device, or its tripping.
  • Amperage and voltage may be controlled within a relatively narrow range because the heat amount produced by the device is proportional to the squared amperage or voltage. Deviations in values of these parameters entail disfunction of the devices.
  • the common device is classified as an once-through steam generator where liquid is forced through tubes by means of a feed pump which ensures overcoming the overall resistance to fluid motion through tubes, and the preset outlet pressure.
  • General disadvantage of this method implemented in all types of generators consists in a low heat-storage capacity of tubes (see page 266 in " Steam generators: College textbook” by A.P. Kovalev. M.: Energoatomizdat, 1985, 386 p, fig .). This disadvantage is particularly expressed in the common device US 1 ,999,446 since the tubular secondary winding length is related with its electric impedance, and is often characterised by insufficient heat exchange area because of insufficient length.
  • the fluid heating inductor having been accepted as the prototype and including the flat ferromagnetic core with rods carrying the primary winding connected to an alternating current source, and the electrically conductive secondary winding inductively connected with the primary winding through the core and representing the heat exchanger for a heated fluid;
  • this heat exchanger is equipped with the heated fluid inlet and outlet nozzles and made of tubular elements located within the primary winding turns plane and embodied as a turn forming a closed loop around a respective rod of the core; at that, tubular element sections located within intercoil space are truncated and inextricably connected with coplanar truncated sections of tubular elements embracing adjacent rods ( RU 2263418 C2 )
  • the heating inductor designed this way is characterised by reduced performance reliability because of truncation of tubular elements integrity, and their subsequent non-detachable interconnection.
  • tubular elements as interconnected forms a common large-volume inner cavity characterised by reduced pressure integrity compared to each separate tubular elements, and its operation becomes explosion-dangerous even without considering the aggravation caused by the non-detachable connection.
  • the common inner cavity of the heat exchanger is not suitable for designing the once-through steam generator where a heated fluid forced by the feed pump through the inner cavity of the non-detachable tube gets vaporized.
  • This is its operation principle which violation poses the risk of local overheating of tubes in such places of generator where the heat-transfer fluid flow gets slowed. Therefore, the prototypic device cannot be used for efficient generation of steam.
  • a particular significant disadvantage of the prototype consists in the design-intrinsic non-detachable interconnection of truncated sections of tubular elements located in the intercoil space and embracing adjacent rods in the same plane. This plane is normal to magnetic induction vector of the primary winding.
  • the secondary tubular winding consisting of short-circuited turns around each rod representing tubular electrical conductors
  • the current flows with its maximum rate just at the tubular conductor sections close to the tubular conductor centerplane normal to the magnetic induction vector direction.
  • the non-detachable connection implemented in the maximum current rate zone is exposed to operation-concurrent destructive action of the current flow, and reduces general reliability of the device.
  • the claimed invention is to enable creation of reliable electric induction steam generator with increased steam production capability at concurrent reduction of metal consumption and overall dimensions of the steam generator.
  • the electric steam generator including ferromagnetic rodded core, primary winding located as coils on the rods and electrically insulated from the latter, the common tubular secondary winding insulated within magnetic field and embracing all the ferromagnetic core rods so that each rod is wrapped with closed turns, featured by that the common secondary tubular winding turns located in the intercoil space are inextricably externally electrically-parallelly interconnected in the tube centerplane parallel to the magnetic induction vector of the rods, whereas on the intertube space periphery there is at least one distant element installed between the secondary tubular winding turns and externally inextricably connected with turns in centerplane of tubes parallel to magnetic induction vector of the rods.
  • This example contains an illustration of new electric steam generator.
  • the electric steam generator is assembled on the basis of a three-phase transformer with flat ferromagnetic core (1) with rods (2) carrying primary winding coils (3).
  • the primary winding coils (3) are connected to an alternating current source through coil taps (4).
  • the common secondary tubular winding (5) is made of a solid tube, and is equipped with inlet nozzle (6) and outlet nozzle (7).
  • the common secondary tubular winding (5) of the electric steam generator is insulated within magnetic field, and is coiled around each rods (2) of the flat ferromagnetic core (1).
  • the welded or soldered non-detachable connection (8) of the common tubular winding turns (5) enables creation of short-circuited turns around each rod (2) in the intercoil space.
  • non-detachable external connection (8) of the common tubular winding turns (5) in the intercoil space is implemented in the tube centerplane parallel to magnetic induction vector in the rods (2). Furthermore, the coil sections of the common tubular winding (5) beyond the intercoil space are spaced apart at the diameter of the tube, and there are distant cylindrical elements (9) installed between them by means of non-detachable connection (8), and ensuring the structure rigidity as well as facilitating the short-circuiting the winding turns. Diameter of the distant tubular elements equals the tube diameter of the secondary tubular winding.
  • the device is featured by the design simplicity and absence of unnecessary energy losses entailing overheating and destruction.
  • another advantage of the invented device consists in that it is insensitive to feed voltage phase offset parameters.
  • the tube length, quantity of short-circuited turns around each rod (2) are preset on the basis of thermo-technical calculations.
  • Experiments have proven the subject design of the common tubular secondary winding (5) to be efficient in inducing currents in the tube wall to ensure the preset uniform heating of the tube throughout its length.
  • the operation concept of the electric steam generator is as follows. Water flow shall firstly be ensured by forcing it through the inlet nozzle (6) into the inner cavity of the common tubular secondary winding (5). Then, the primary winding (3) shall be connected through taps (4) to an alternating current source. This causes the primary winding to induce an alternating magnetic flux in the rods (2). The alternating magnetic flux in the turns short-circuited around each rod (2) of the common tubular winding (5) by means of the non-detachable connections (8) causes induction of a heavy current heating the common tubular secondary winding (5). The thermal energy gets transferred to water flowing through the inner cavity of the common tubular secondary winding (5). And, according to the once-through steam generator operation concept, it is here where water is vaporized, and the obtained steam is released though the outlet nozzle (7).
  • the current rate heating the common tubular winding (5), its length, and heat-storage capacity of the device version proposed in accordance with this invention are parameters consistent with each other what ensures designing compact and reliable steam generators.
  • Continuity of the common tubular secondary winding (5) and its electrical heat-up uniformity throughout its length comprehensively ensure implementation of the once-through steam generator operation concept.
  • the prototype disadvantages were overcome, and the device can be used as the once-through steam generator within a certain power range without reduction in performance reliability.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)
EP17922300.3A 2017-08-24 2017-09-29 Générateur de vapeur électrique Withdrawn EP3675598A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017129929A RU2658658C1 (ru) 2017-08-24 2017-08-24 Электрический парогенератор
PCT/RU2017/000721 WO2019039960A1 (fr) 2017-08-24 2017-09-29 Générateur de vapeur électrique

Publications (2)

Publication Number Publication Date
EP3675598A1 true EP3675598A1 (fr) 2020-07-01
EP3675598A4 EP3675598A4 (fr) 2021-05-19

Family

ID=62713600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17922300.3A Withdrawn EP3675598A4 (fr) 2017-08-24 2017-09-29 Générateur de vapeur électrique

Country Status (3)

Country Link
EP (1) EP3675598A4 (fr)
RU (1) RU2658658C1 (fr)
WO (1) WO2019039960A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2691726C1 (ru) * 2018-09-07 2019-06-18 Общество с ограниченной ответственностью "В-Плазма" Прямоточный электрический парогенератор
FR3104669B1 (fr) * 2019-12-13 2021-11-26 Saipem Sa Installation sous-marine de chauffage d’un effluent diphasique liquide/gaz circulant à l’intérieur d’une enveloppe sous-marine
RU2736270C1 (ru) * 2020-07-06 2020-11-13 Владимир Михайлович Шипилов Электрический пароперегреватель

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1999446A (en) * 1933-10-06 1935-04-30 James K Delano Transformer coupled induction heater
US4602140A (en) * 1984-11-01 1986-07-22 Mangels Industrial S.A. Induction fluid heater
RU2138137C1 (ru) * 1998-02-11 1999-09-20 Карманов Евгений Дмитриевич Индукционный нагреватель текучих сред
RU2226046C2 (ru) * 2001-04-12 2004-03-20 Комсомольский-на-Амуре государственный технический университет Электроводонагреватель трансформаторного типа
RU2263418C2 (ru) * 2001-07-18 2005-10-27 Карманов Евгений Дмитриевич Индукционный нагреватель текучих сред
RU2013125924A (ru) * 2013-06-05 2014-12-10 Владимир Михайлович Шипилов Электрический парогенератор

Also Published As

Publication number Publication date
WO2019039960A1 (fr) 2019-02-28
EP3675598A4 (fr) 2021-05-19
RU2658658C1 (ru) 2018-06-22

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