EP0609572A1 - Regenerationswärmetauscher - Google Patents

Regenerationswärmetauscher Download PDF

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Publication number
EP0609572A1
EP0609572A1 EP93200274A EP93200274A EP0609572A1 EP 0609572 A1 EP0609572 A1 EP 0609572A1 EP 93200274 A EP93200274 A EP 93200274A EP 93200274 A EP93200274 A EP 93200274A EP 0609572 A1 EP0609572 A1 EP 0609572A1
Authority
EP
European Patent Office
Prior art keywords
heat regenerator
housing
gas
longitudinal axis
regenerator
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Withdrawn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
EP93200274A
Other languages
English (en)
French (fr)
Inventor
Maarten Johannes Van Der Burgt
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP93200274A priority Critical patent/EP0609572A1/de
Priority to GB9401840A priority patent/GB2274911A/en
Publication of EP0609572A1 publication Critical patent/EP0609572A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material

Definitions

  • the present invention relates to a heat regenerator.
  • a heat regenerator is a device for exchanging heat from one fluid stream to another fluid stream. To this end the heat regenerator is provided with a mass of material which stores heat from a hot fluid stream and which delivers subsequently the heat to a cold fluid stream. This feature distinguishes a heat regenerator from a continuously operating heat exchanger which is provided with a wall separating the hot and cold fluid streams passing simultaneously through the heat exchanger.
  • the invention relates to a heat regenerator comprising a cylindrical, open ended housing rotatably arranged about its central longitudinal axis, a first manifold communicating with one open end of the housing, a second manifold communicating with the opposite open end of the housing, and a mass of material arranged in the housing.
  • a heat exchanger is the Ljungström heat regenerator as described in Ullmans Encyklopädie der waive Chemie, 4th Edition, Band 2, pages 428-430.
  • the mass of material comprises an annular element provided with a plurality of parallel passages through which the gas streams flow during normal operation to receive and deliver heat.
  • a problem encountered with the known heat exchanger is that it is not suitable for cooling a hot gas, for example flue gas, which hot gas contains particulate material such as dust or fly ash which can easily stick to the inner surfaces of the passages. Gradually passages get clogged with deposited particulate matter and the efficiency of the heat exchanger decreases.
  • a hot gas for example flue gas
  • particulate material such as dust or fly ash
  • the heat exchanger comprises a cylindrical, open ended housing rotatably arranged about its central longitudinal axis, a first manifold communicating with one open end of the housing, a second manifold communicating with the opposite open end of the housing, and a plurality of slim cylindrical elements arranged in the housing parallel to the central longitudinal axis of the housing, wherein the degree of filling the housing is less than 1.
  • the invention further relates to a method of exchanging heat between a hot gas and a cool gas using a heat exchanger including the above heat regenerator, which method comprises rotating the housing about its central longitudinal axis and further comprises the sequential steps of
  • degree of filing used in the claims and in the specification is defined as the average height of the segment of the housing loaded with the slim cylindrical elements divided by the inner diameter of the housing. Since the degree of filling is less than 1, there is an empty segment, and as a result during normal operation, when the open ended housing is rotated, the slim cylindrical elements can rub against each other to remove deposited material.
  • lim cylindrical elements used in the claims and in the specification is used to refer to cylindrical elements, pipes or rods, having a length which is much greater than the outer diameter.
  • the length of a cylindrical element is greater than the diameter of the housing, for example greater than between 1.5 to 2 times the diameter of the housing.
  • the maximum length of a cylindrical element is the length of the housing.
  • the outer diameter of a cylindrical element is suitably between 10 ⁇ 1 and 10 ⁇ 3 times the inner diameter of the housing.
  • the heat regenerator 1 comprises a cylindrical, open ended housing 2 rotatably arranged about its central longitudinal axis 3.
  • the support structure, the bearings and the driving means are not shown.
  • the heat regenerator 1 further comprises a stationary first manifold 5 communicating with one open end of the housing 2, and a stationary second manifold 9 communicating with the opposite open end of the housing 2.
  • the first manifold 5 comprises a ring 10 and a cover 11 provided with an opening 12
  • the second manifold 9 comprises a ring 13 and a cover 14 provided with an opening 16.
  • the heat regenerator 1 also comprises a mass of material which comprises a plurality of slim cylindrical elements in the form of rods 17 arranged in the housing 2 parallel to the central longitudinal axis 3 of the housing 2.
  • the degree of filling the housing 2, which is the the average height 20 of the segment of the housing 2 loaded with the slim cylindrical elements 17 divided by the inner diameter of the housing 2, is less than 1.
  • the housing 2 is rotated about its central longitudinal axis 3.
  • Hot gas is supplied to the first manifold 5 through opening 12.
  • the hot gas is passed through the passages between the rods 17 in the housing 2 and heats the mass of material in the housing 2, and the gas is removed through the second manifold 9.
  • the heat regenerator 1 is heated to a predetermined level, the flow of hot gas through the heat regenerator 1 is interrupted.
  • cold gas is supplied to the second manifold 9 and it is passed through the heat regenerator 1 until the heat regenerator 1 is cooled to a predetermined level. Then the flow of cold gas through the heat regenerator 1 is interrupted.
  • the temperature in the housing 2 can be measured directly or the temperature of the fluid leaving the heat regenerator can be measured, wherein the latter is an indirect measurement of the temperature in the housing.
  • a heat exchanger consisting of one heat regenerator is used to exchange heat between two gaseous fluids, the method of exchanging heat is then an intermittent one.
  • the method becomes a continuous one.
  • one cycle of the continuous method method starts with passing the hot gas through the primary heat regenerator until the primary heat regenerator is heated to a predetermined level, and passing cold gas through the secondary heat regenerator until the secondary heat regenerator is cooled to a predetermined level.
  • the flow of hot gas through the primary heat regenerator and the flow of cold gas through the secondary heat regenerator are interrupted.
  • the cold gas is passed through the primary heat regenerator until the primary heat regenerator is cooled to a predetermined level
  • the hot gas is passed through the secondary heat regenerator until the secondary heat regenerator is heated to a predetermined level.
  • the flow of cold gas through the primary heat regenerator and the flow of hot gas through the secondary heat regenerator are interrupted. And a new cycle can start.
  • a gasification reactor 30 is provided with an outlet conduit 32 through which synthesis gas, a mixture of carbon monoxide and hydrogen, can be removed and an inlet conduit 35 through which an oxidant is supplied to the gasification reactor 30.
  • the conduits for supplying fuel and for removing slag are not shown.
  • the conduit 32 is connected to the first manifold 40 of primary heat regenerator 41, and from the second manifold 42 of the primary heat regenerator 41 extends conduit 43.
  • Conduit 45 debouches into the first manifold 46 of secondary heat exchanger 47, and second manifold 48 communicates with the conduit 35.
  • the primary and secondary heat regenerator 41 and 47 are of the design of the heat regenerator 1 as shown in Figure 1.
  • Oxidant is supplied through conduit 45 at a temperature of about 100 °C to the secondary heat exchanger 47 and it is heated to about 800 °C, hot oxidant is supplied through conduit 35 into the gasification reactor 30.
  • fuel for example a hydrocarbon oil, coal or natural gas
  • synthesis gas which is removed at a temperature of about 1 500 °C through conduit 32.
  • the hot synthesis gas can be mixed with quench gas to lower the temperature to about 900 °C.
  • the hot gas is passed through the primary heat regenerator 41 and cooled synthesis gas is removed through conduit 43.
  • the degree of filling is between 0.70 and 0.95.
  • the housing is between 0.90 and 0.95.
  • the central longitudinal axis 3 of the housing 2 of the heat regenerator 1 as shown in Figure 1 is horizontal.
  • the central longitudinal axis is substantially horizontal, that is the angle between a horizontal plane and the central longitudinal axis of the housing is less than 20°.
  • the angle between a horizontal plane and the central longitudinal axis of the housing is suitably between 1° and 20°.
  • the slim cylindrical elements can also be pipes, an advantage is that the pressure drop over the heat regenerator is decreased.
  • the mass of the material is decreased as well so that pipes have to be applied with a larger degree of filling than in case rods of the same diameter are used or the frequency of switching between passing hot gas trough the heat regenerator and passing cold gas through it has to be increased.
  • the cylindrical elements can be made of any heat-resistant material and suitably they are made from refractory material, such as ceramic material.
EP93200274A 1993-02-03 1993-02-03 Regenerationswärmetauscher Withdrawn EP0609572A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93200274A EP0609572A1 (de) 1993-02-03 1993-02-03 Regenerationswärmetauscher
GB9401840A GB2274911A (en) 1993-02-03 1994-02-01 Preventing clogging in heat regenerators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93200274A EP0609572A1 (de) 1993-02-03 1993-02-03 Regenerationswärmetauscher

Publications (1)

Publication Number Publication Date
EP0609572A1 true EP0609572A1 (de) 1994-08-10

Family

ID=8213604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93200274A Withdrawn EP0609572A1 (de) 1993-02-03 1993-02-03 Regenerationswärmetauscher

Country Status (2)

Country Link
EP (1) EP0609572A1 (de)
GB (1) GB2274911A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1003504C2 (nl) * 1996-07-04 1998-01-07 Univ Delft Tech Roterende reactor en toepassing daarvan.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2913461A1 (fr) * 2007-03-09 2008-09-12 Philippe Pascot Regenerateur,notamment pour moteurs stirling,moteur stirling comprenant un tel regenerateur.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE621722C (de) * 1932-02-07 1935-11-12 Gustav Bojner Regenerator mit um eine waagerechte Achse drehbarem Gehaeuse
GB895463A (en) * 1958-12-19 1962-05-02 Green & Son Ltd Improvements in or relating to air-heaters for steam boilers
US4615379A (en) * 1984-06-05 1986-10-07 Sigri Gmbh Storage body for a regenerator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB702158A (en) * 1951-04-24 1954-01-13 Power Jets Res & Dev Ltd Improvements relating to regenerative heat exchangers
US3872918A (en) * 1974-02-21 1975-03-25 Stalker Corp Heat exchanger
DE3035386C2 (de) * 1980-09-19 1985-08-29 Apparatebau Rothemühle Brandt + Kritzler GmbH, 5963 Wenden Anwendung von als Hohlkugeln oder als hohle Vielflächner ausgebildeten, wärmeübertragenden Elementen in einem regenerativen Wärmetauscher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE621722C (de) * 1932-02-07 1935-11-12 Gustav Bojner Regenerator mit um eine waagerechte Achse drehbarem Gehaeuse
GB895463A (en) * 1958-12-19 1962-05-02 Green & Son Ltd Improvements in or relating to air-heaters for steam boilers
US4615379A (en) * 1984-06-05 1986-10-07 Sigri Gmbh Storage body for a regenerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1003504C2 (nl) * 1996-07-04 1998-01-07 Univ Delft Tech Roterende reactor en toepassing daarvan.
WO1998001222A1 (en) * 1996-07-04 1998-01-15 Technische Universiteit Delft Rotary reactor and use thereof

Also Published As

Publication number Publication date
GB2274911A (en) 1994-08-10
GB9401840D0 (en) 1994-03-30

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