US3904722A - Steam reforming device - Google Patents

Steam reforming device Download PDF

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Publication number
US3904722A
US3904722A US383515A US38351573A US3904722A US 3904722 A US3904722 A US 3904722A US 383515 A US383515 A US 383515A US 38351573 A US38351573 A US 38351573A US 3904722 A US3904722 A US 3904722A
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US
United States
Prior art keywords
steam
orifice
passageway
pressure
temperature
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.)
Expired - Lifetime
Application number
US383515A
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English (en)
Inventor
Toshiaki Onoda
Shokichi Kubota
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Tokico Ltd
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Tokico Ltd
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Filing date
Publication date
Application filed by Tokico Ltd filed Critical Tokico Ltd
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Publication of US3904722A publication Critical patent/US3904722A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • F22G5/123—Water injection apparatus
    • F22G5/126—Water injection apparatus in combination with steam-pressure reducing valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/13—Desuperheaters

Definitions

  • a steam reforming valve device comprising a casing structure having a steam inlet and outlet and further having steam consecutive passageways between the steam inlet and outlet, pressure reducing valve means provided within the steam passageways in the upstream part thereof, and temperature reducing means provided within the steam passageways in the downstream part thereof and as a separate structure from the pressure reducing valve means.
  • the pressure reducing valve means and the temperature reducing means while being assembled unitarilly with and within the casing structure, are mutually separated by a suitable distance.
  • the constituent parts of the pressure reducing valve means can be replaced individually and independently of other parts.
  • This invention relates to a steam reforming valve device and more particularly to a device for converting steam at high temperature and high pressure into steam at low temperature and low pressure.
  • a device comprising, within a steam flowpath, a pressure reducing device disposed at an upstream position and a temperature reducing device disposed apart and downstream from the pressure reducing device.
  • the pressure reducing device and the temperature reducing device are respectively provided separately and, moreover, at separated positions in this known device, the space required for the installation of these devices is large, and a largenumber of accessory equipment items are required, whereby high costs are entailed.
  • a further drawback is that, since the pressure reducing action and the temperature reducing actions with respect to the steam are carried out at relatively separated places, accurate control of both actions is difficult.
  • a steam reforming valve wherein a pressure reducing valve and a temperature reducing means are integrated into a single unit has been proposed.
  • the pressure reducing valve part is provided with one or more cooling water injection nozzles for temperature reduction, and pressure reduction and temperature reduction are carried out with the same part and at' the same time.
  • an object of the invention is to provide a steam reforming device which is integrally constructed as a single device yet has a temperature re ducing part which is provided in a position spaced apart by a suitable distance from a pressure reducing valve.
  • parts such as the valve body'and the valve seat can be changed or re placed irrespectively of the temperature reducing part.
  • Another object of the invention is to provide a steam reforming valve in which, by providing a stepped configuration in a Water injection orifice part, the steam flow past this part is effectively utilized to attain effective injection of cooling water in the form a fine spray into a temperature reducing section.
  • FIG. 1 is side view, in longitudinal section, of one embodiment of a steam reforming device according to the present invention.
  • FIG. 2 is an'enlarged side view, in longitudinal section, of one important part of the steam reforming valve illustrated in FIG. 1.
  • the steam reforming de vice shown therein has a device casing structure 10 having a steam passageway 10a provided with a steam inlet ll 1 for introducing superheated steam at high temperature and high pressure from a lateral direction and steam passageways 10b and extending in a direction perpendicular to the steam flowpath 10a.
  • the passageway 10c is coaxially and contiguously connected to the passageway 10b and has a steam outlet 12 for conducting out steam which has been reformed, i.e., re Jerusalem in temperature and pressure, as described hereinafter.
  • a chamber 13 Between the passageways 10a and 10b, there is provided a chamber 13.
  • a sleeve-like cage l4 passing through the chamber 13 is tightly fitted in a hollow cavity 18 of the valve casing structure 10 and, in its part passing through the chamber 13, has through holes 15.
  • a seat ring 16 consituting a valve seat is inserted into the casing structure 10 over a gasket 17 interposed therebetween.
  • the axial centerline of the cage 14 coincides with the axial centerline of the steam passageways 10b and 100.
  • valve plug 19 in a fluid-proof manner and in a manner to slide freely in the axial direction.
  • valve body 20 At the lower end of the valve plug 19, there is formed integrally and coaxially therewith a valve body 20 adapted to seat against and separate from the abovementioned seat ring 16.
  • a valve stem 21 is fixed coaxially to the upper part of the valve plug 19 and extends upward and out of the valve casing structure to an upper stem end 21a, which is coupled to an actuating device (not shown) such as a diaphragm actuator.
  • a cover structure 22 is fixedly but detachably secured to the upper part of the valve casing structure 10 over a gasket 25 interposed therebetween by stud bolts 23 and nuts 24.
  • the cover structure 22 presses down on the upper end of the cage 14., whereby the lower end of the cage 14 presses the seat ring 16 down on the gasket 17.
  • the cover structure 22 has a hollow interior, through which the above mentioned valve stem 21 is passed.
  • a stem guide 26 for slidably guiding the valve stem 21 is fixed to the cover structure 22 near the lower part thereof.
  • the cover structure 22 is further provided at its upper part with a sealing device comprising a packing retaining ring 27, a packing 28, a lantern ring 29, a packing ring 31, a retaining disk 32 for retaining the retaining ring 31, stud bolts 33 and nuts 34 for securing the retaining disk 32 to the cover structure 22, a lubricator plug 35 for lubricating the lantern ring 29, and other parts.
  • the valve stem 21 passes through this sealing device.
  • a recess 36 In a part of the casing structure 10 contiguous to the steam passageway 10b, there is formed a recess 36, in which an orifice forming member 37 of cylindrical shape is inserted and fixed by a locking member 38.
  • the orifice forming member 37 in this particular embodiment, comprises two orifice forming half members 37a and 37b, which upon being assembled form the stem passageway 10c.
  • a clearance C 1 is provided be tween the upper surface of the orifice forming member 37 and the upper wall surface of the recess 36 in the casing structure 10.
  • the area of the member 37 in contact of with the total wall surface of the recess 36 is designed to be a minimum.
  • annular hollow space 39 is formed, and an annular sleeve 40 of thin wall thickness is inserted in this hollow space 39.
  • a slit is provided in sleeve 40 corresponding to a slit (orifice) 41 between the orifice forming half members 37a and 3712. Accordingly, the internal space of the sleeve 40 is communicative by way of the slit of the sleeve 40 and the slit 4] with the passageway 100.
  • the gap between the slit 41 and the seat ring 16 is selected in the instant embodiment to be approximately lmm. Concavities and convexities are formed on the outer surface of the sleeve 40.
  • a clearance C is provided between the sleeve 40 and the orifice forming half members 370 and 37b thereby to reduce to a minimum the area of contact with these parts.
  • the inner diameter of the nozzle forming half mem ber 37b is made slightly greater than the inner diameter of the orifice forming half member 37a. Consequently, in the part of the slit 41, a stepped part (I (for example, of the order of 1mm.) is formed between the inner wall surfaces of the half member 37a and the half member 3712.
  • a water supply pipe 42 is passed transversely through the casing structure to communicate at its inner end with the interior of the sleeve 40.
  • In outer end of this pipe 42 is provided with a fitting 43 through which water for temperature reduction is supplied to flow in the arrow direction B through the pipe 42 and into the interior of the sleeve 40.
  • the water supply pipe 42 is held by a pipe holding structure 44, which is supported by the casing structure 10 but is also adapted to contact this structure with minimum contact area. Furthermore, a clearance C is provided also between the water supply pipe 42 and the casing structure 10.
  • the area of contact between the orifice forming half members 37a and 37b, the area of contact between the sleeve 40 and the orifice forming half members 370 and 3712, the area of contact between the water supply pipe 43 and the casing structure 10, and the area of contact between the pipe holding structure 44 and the casing structure 10 are made as minimal as possible. For this reason, it is possible to maintain a great temperature different between the water for temperature reduction, which passes through the sleeve 40 and is ejected as a fine spray through the slit 41 as described hereinafter, and superheated steam at high tempeature to be reduced in temperature.
  • a reducer 45 having an interior communicating coaxially with steam outlet 12 and diverging with an inner diameter increasing with distance from the outlet 12.
  • a perforated plate 46 provided with a large number of holes 47 is fixed to the downstream end of the reducer 45.
  • the steam reforming device of the above described structural organization according to the invention operates as follows.
  • Primary-side superheated steam at a high temperature of, for example, from 400 to 530C, and a high pressure of, for example, from 40 to kg/cm is supplied from a superheated steam source (not shown) and enters the steam reforming device through the inlet 11 to enter the passageway 10a and flow in the arrow direction A to the chamber 13.
  • the valve plug 19 also is lifted unitarily with the stem 21, and the valve body 20 separates from the seat ring 16. Consequently, the primary-side steam which has entered the chamber 13 from the passageway 10a flows through the through holes 15 and between the valve body 20 and the seat ring 16 and, being here throttled and reduced in pressure to a pressure of from 2 to 40 kg/cmfl for example. flows at high velocity into the passageway 1017. Therefore, in the pressure reducing part formed by the valve body 20 and the seat ring 16, only pressure reduction of the primary-side steam is carried out.
  • the inner diameter of the orifice half member 370 has been made smaller than that of the orifice half member 37b, whereby, in the orifice member 37, the orifice half member 37a forms a kind of Venturi tube construction or throat.
  • the water within the sleeve 40 is sucked through the slit (orifice) 41 formed between the orifice half members 37a and 37b by the negative pressure produced by the steam flowing from the passageway 10b to the passageway 10c and past this Venturi throat at high velocity.
  • the water is thus ejected as a fine spray by the resulting atomization action.
  • the above mentioned pressure reduced stream is mixed with the fine spray of water ejected through the slit (orifice) 41 and thereby reduced in temperature as it flows through the interior of the reducer 45 in the arrow direction C.
  • This steam is further agitated in a positive manner by the perforated plate 46 and thereby uniformly reduced in temperature to from to 300C, for example.
  • pressure detecting means and temperature detecting means are installed downstream from the perforated plate 46 at positions near the downstream side thereof. Then, in accordance with the detection outputs of these detecting or monitoring means, the axial displacement of the stem 21 and the flowrate of the water supplied through the water supply inlet fitting 43 and into the sleeve 40 are automatically controlled.
  • a steam reforming device comprising: a casing structure having a steam inlet, a steam outlet and consecutive passageways therebetween; pressure reducing valve means in an intermediate part of said steam passageways and operating to reduce the pressure of superheated steam flowing at high temperature and high pressure into said passageways through said steam inlet to a predetermined pressure value; and temperature reducing means within the steam passageways downstream from said pressure reducing valve means and constituted as a separate structure therefrom and oper ating to discharge water as a spray into the hightemperature, low-pressure steam thus reduced in pressure by the pressure reducing valve means and thereby to reduce the temperature of this steam to a predetermined temperature value, said temperature reducing means comprising an orifice-forming member forming said passageway through which the steam reduced in pressure by said pressure reducing valve means flows and, moreover, forming an annular hollow space and an annular orifice of slit-form in the wall surface of the orifice-forming member, a hollow sleeve disposed within said annular hollow space in the orifice-forming member
  • a steam reforming device further comprising a cover structure detachably fixed to the casing structure and covering said pressure reducing valve means inserted in the casing structure, such that constituent parts of the pressure reducing valve means can be disassembled and taken out of the casing structure for replacement by detaching the covering structure.
  • a steam reforming device in which said orifice-forming member is so formed that, with the position of said orifice as a reference line, the inner diameter of the passageway upstream of said reference line is small, and that downstream of said reference line is large, whereby said passageway has a stepped configuration at said orifice.
  • a steam reforming device according to claim 3 wherein said stepped configuration of said passageway provides a Venturi throat serving for introduction of the water as a spray into said passageway.
  • a steam reforming device in which said orifice-forming member comprises two orifice forming half members forming therebetween said orifice, the orifice forming half member upstream of the orifice having a smaller inner diameter than the other orifice forming half member downstream of the orifice.
  • a steam reforming device in which clearances are provided respectively between the orifice forming member and the casing structure, between the sleeve and the orifice forming member, and between the water supply pipe and the casing structure.
  • a steam reforming device which further comprises an exit passageway for conducting steam fiowing out of said steam outlet, and perforated plate means installed within said exit passageway, said perforated plate means having a large number of holes for passage therethrough of steam already sprayed with water.
  • a steam reforming device according to claim 1, wherein said projection and groove means comprises convexities and concavities on the periphery of said sleeve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Nozzles (AREA)
  • Hydrogen, Water And Hydrids (AREA)
US383515A 1972-07-31 1973-07-30 Steam reforming device Expired - Lifetime US3904722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7666172A JPS5321125B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-07-31 1972-07-31

Publications (1)

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US3904722A true US3904722A (en) 1975-09-09

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US383515A Expired - Lifetime US3904722A (en) 1972-07-31 1973-07-30 Steam reforming device

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US (1) US3904722A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5321125B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA987998A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2338444A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321219A (en) * 1979-12-03 1982-03-23 Barker Richard M Steam cleaner
US4442047A (en) * 1982-10-08 1984-04-10 White Consolidated Industries, Inc. Multi-nozzle spray desuperheater
US6715505B2 (en) 2000-11-30 2004-04-06 Dresser, Inc. Steam pressure reducing and conditioning valve
US6742773B2 (en) * 2000-11-30 2004-06-01 Dresser, Inc. Steam pressure reducing and conditioning valve
US6758232B2 (en) 2000-11-30 2004-07-06 Dresser, Inc. Steam pressure reducing and conditioning system
USD582628S1 (en) * 2007-08-07 2008-12-16 Victor Mammana Skewered sausage
US20090085234A1 (en) * 2007-10-02 2009-04-02 Spicer David B Method And Apparatus For Cooling Pyrolysis Effluent
WO2010148221A1 (en) * 2009-06-19 2010-12-23 Spx Corporation Atomizing desuperheater shutoff apparatus and method
WO2011153403A1 (en) * 2010-06-03 2011-12-08 Spx Corporation A desuperheater seat-ring apparatus
US20130337394A1 (en) * 2012-06-18 2013-12-19 Tokyo Electron Limited Heat treatment apparatus
US20150128882A1 (en) * 2013-11-08 2015-05-14 Fisher Controls International Llc Desuperheater and spray nozzles therefor
CN105716071A (zh) * 2016-03-30 2016-06-29 中国长江动力集团有限公司 内置式减温减压器结构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523098Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-10-07 1980-06-02
JPS52155230U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-05-21 1977-11-25
JPS5724328U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1980-07-15 1982-02-08
JPH0480681U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1990-11-26 1992-07-14

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894391A (en) * 1927-10-29 1933-01-17 Swartwout Co Desuperheater
US2355458A (en) * 1941-09-06 1944-08-08 Swartwout Co Desuperheating valve
US2717637A (en) * 1947-05-30 1955-09-13 Swingfire Bahamas Ltd Fuel supply apparatus for resonant pulse jet combustion device
US2725221A (en) * 1951-12-08 1955-11-29 Siemens Ag Steam conversion valve
US3134827A (en) * 1959-12-23 1964-05-26 Siemens Ag Steam conversion valve
US3207492A (en) * 1960-07-05 1965-09-21 Bendek Fa Kohler Oscar Apparatus for controlling the pressure and temperature of gas by spraying it with water
US3219325A (en) * 1962-12-04 1965-11-23 Brown William Mixing valve
US3220708A (en) * 1963-03-29 1965-11-30 Maenaka Valve Works Co Ltd Desuperheating and pressure-reducing valve for superheated steam

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894391A (en) * 1927-10-29 1933-01-17 Swartwout Co Desuperheater
US2355458A (en) * 1941-09-06 1944-08-08 Swartwout Co Desuperheating valve
US2717637A (en) * 1947-05-30 1955-09-13 Swingfire Bahamas Ltd Fuel supply apparatus for resonant pulse jet combustion device
US2725221A (en) * 1951-12-08 1955-11-29 Siemens Ag Steam conversion valve
US3134827A (en) * 1959-12-23 1964-05-26 Siemens Ag Steam conversion valve
US3207492A (en) * 1960-07-05 1965-09-21 Bendek Fa Kohler Oscar Apparatus for controlling the pressure and temperature of gas by spraying it with water
US3219325A (en) * 1962-12-04 1965-11-23 Brown William Mixing valve
US3220708A (en) * 1963-03-29 1965-11-30 Maenaka Valve Works Co Ltd Desuperheating and pressure-reducing valve for superheated steam

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321219A (en) * 1979-12-03 1982-03-23 Barker Richard M Steam cleaner
US4442047A (en) * 1982-10-08 1984-04-10 White Consolidated Industries, Inc. Multi-nozzle spray desuperheater
US6715505B2 (en) 2000-11-30 2004-04-06 Dresser, Inc. Steam pressure reducing and conditioning valve
US6742773B2 (en) * 2000-11-30 2004-06-01 Dresser, Inc. Steam pressure reducing and conditioning valve
US6758232B2 (en) 2000-11-30 2004-07-06 Dresser, Inc. Steam pressure reducing and conditioning system
USD582628S1 (en) * 2007-08-07 2008-12-16 Victor Mammana Skewered sausage
US8074973B2 (en) * 2007-10-02 2011-12-13 Exxonmobil Chemical Patents Inc. Method and apparatus for cooling pyrolysis effluent
US20090085234A1 (en) * 2007-10-02 2009-04-02 Spicer David B Method And Apparatus For Cooling Pyrolysis Effluent
US8177200B2 (en) 2007-10-02 2012-05-15 Exxonmobil Chemical Patents Inc. Method and apparatus for cooling pyrolysis effluent
US20110233797A1 (en) * 2007-10-02 2011-09-29 Spicer David B Method And Apparatus For Cooling Pyrolysis Effluent
CN102460013A (zh) * 2009-06-19 2012-05-16 Spx公司 雾化降温器关闭装置和方法
CN102460013B (zh) * 2009-06-19 2015-09-02 Spx流动有限公司 雾化降温器关闭装置和方法
GB2483616A (en) * 2009-06-19 2012-03-14 Spx Corp Atomizing desuperheater shutoff apparatus and method
US20100319781A1 (en) * 2009-06-19 2010-12-23 Veaceslav Ignatan Atomizing desuperheater shutoff apparatus and method
WO2010148221A1 (en) * 2009-06-19 2010-12-23 Spx Corporation Atomizing desuperheater shutoff apparatus and method
US8333329B2 (en) * 2009-06-19 2012-12-18 Spx Corporation Atomizing desuperheater shutoff apparatus and method
US9759332B2 (en) 2009-06-19 2017-09-12 Spx Flow, Inc. Atomizing desuperheater shutoff apparatus and method
GB2483616B (en) * 2009-06-19 2013-12-11 Spx Corp A valve assembly for desuperheating a gas or liquid
US8469341B2 (en) 2010-06-03 2013-06-25 Spx Corporation Desuperheater seat-ring apparatus
AU2011261329B2 (en) * 2010-06-03 2015-06-11 Spx Flow, Inc. A desuperheater seat-ring apparatus
CN103037957B (zh) * 2010-06-03 2015-06-24 Spx公司 过热降温器座环装置
WO2011153403A1 (en) * 2010-06-03 2011-12-08 Spx Corporation A desuperheater seat-ring apparatus
EA027404B1 (ru) * 2010-06-03 2017-07-31 ЭсПиИкс ФЛОУ, ИНК. Устройство с кольцевым гнездом для пароохладителя
CN103037957A (zh) * 2010-06-03 2013-04-10 Spx公司 过热降温器座环装置
US20130337394A1 (en) * 2012-06-18 2013-12-19 Tokyo Electron Limited Heat treatment apparatus
US20150128882A1 (en) * 2013-11-08 2015-05-14 Fisher Controls International Llc Desuperheater and spray nozzles therefor
US9612009B2 (en) * 2013-11-08 2017-04-04 Fisher Controls International Llc Desuperheater and spray nozzles therefor
CN105003905B (zh) * 2013-11-08 2018-07-10 费希尔控制国际公司 减温器及其喷嘴
CN105716071A (zh) * 2016-03-30 2016-06-29 中国长江动力集团有限公司 内置式减温减压器结构
CN105716071B (zh) * 2016-03-30 2017-11-03 中国长江动力集团有限公司 内置式减温减压器结构

Also Published As

Publication number Publication date
DE2338444A1 (de) 1974-02-14
JPS4947938A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-05-09
CA987998A (en) 1976-04-27
JPS5321125B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-06-30

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