US3828843A - Process for handling fluids in heat transfer equipment - Google Patents

Process for handling fluids in heat transfer equipment Download PDF

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Publication number
US3828843A
US3828843A US00322192A US32219273A US3828843A US 3828843 A US3828843 A US 3828843A US 00322192 A US00322192 A US 00322192A US 32219273 A US32219273 A US 32219273A US 3828843 A US3828843 A US 3828843A
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United States
Prior art keywords
stage
steam
condensate
flow
heat
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Expired - Lifetime
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US00322192A
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English (en)
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A Asfura
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Individual
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Individual
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Application granted granted Critical
Publication of US3828843A publication Critical patent/US3828843A/en
Priority to US05/503,626 priority Critical patent/USRE29790E/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/02—Arrangements or modifications of condensate or air pumps
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating the cylinders
    • D21F5/028—Heating the cylinders using steam
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C2700/00—Finishing or decoration of textile materials, except for bleaching, dyeing, printing, mercerising, washing or fulling
    • D06C2700/13—Steaming or decatising of fabrics or yarns

Definitions

  • ABSTRACT This invention provides a novel process of handling fluids which increase heat transfer efi'iciency in all types of heatstransmission equipment. This process is applicable both to single and multiple units; in both cases, heat transfer is enhanced and steam consumption reduced.
  • the process consists in extracting, along with the condensate, some of the steam from inside of a steam heated unit, separating this steam from the condensate and noncondensable gases, before and after feeding this extraction steam to another unit or group of units working at a lower pressure.
  • One additional object of the invention is to provide a process for extracting steam from a heat transfer unit, separating it from the condensate and non-condensable gases, and reutilizing it in another unit at a lower pressure than the previous one.
  • Another important object of the invention is the extraction of non-condensable gases from inside of a unit. It is well known, among the skilled in the art, that it is necessary to extract certain amount of live" steam in order to extract non-condensable gases.
  • the process makes use of devices to separate the non-condensables from the extraction steam, before and after utilizing this steam in other heat transfer units or as a humiditying medium.
  • the new process can be applied to any type of steam heated equipment and, in this description, the novel process of this invention, will be described as applied to a machine for paper and which consists of several rotating cylinders, or dryers, heated with steam.
  • a machine for paper which consists of several rotating cylinders, or dryers, heated with steam.
  • the novel process for handling fluids in heat transfer equipment basically consists in supplying steam to a unit or units by means of common pipes. Every unit has its own steam trap, modified with a steam extraction device-The thus modified steam traps discharge the condensate to a common pipe line which carries it into a flash Tank described later on. Extraction steam is piped out from each modified steam trap into a common pipe header, which supplies this extraction steam, through a separator, to another group of units.
  • the second group of units has also individual modified steam traps, except that, in this case, both the extraction steam and the condensate are piped together to the flash tank.
  • the Flash Tank has the purpose of supplying steam to the lowest pressure units. Since the condensate that is discharged to the Flash Tank is at a higher pressure, part of it flashes into steam when it enters the low pressure tank. This Flash steam, plus the extraction steam from the second group of units, is supplied to the lowest pressure units, thus resulting in the maximum utilization of the heat available in the fluids supplied to the machine.
  • FIG. 1 depicts a paper drying machine, composed of multiple rotary cylinder dryers, heated with steam
  • FIG. 1 depicts a paper drying machine, composed of multiple rotary cylinder dryers, heated with steam
  • Each branch has its own stop valve 4 at the inlet, and another stop valve 5, at the outlet 6.
  • Each outlet branch pipe 6 connects to a special separating steam trap 7.
  • This special modified steam trap 7 receives condensate and steam from the dryer cylinders 1, and it separates them, discharging the condensate through pipe 8, with a stop valve 9, to header 10 and into flash tank 11.
  • the extracted steam is discharged through pipe 12, and stop valve 13 to header 14.
  • This header 14 splits into two lines 14a and 14b.
  • Line 14a goes to a thermal noncondensable gas eliminator 15 which discharges the gases to atmosphere.
  • Second line 14b goes into a condensate separator 16, from which a header 17 supplies the extraction steam to a second group of cylinder dryers 18 by means of header 19 and stop valves 20.
  • Condensate is drained from separator 16 by a normal steam trap 22 through piping 21 to flash tank 11.
  • the second group of cylinder dryers discharges through individual branch pipes 23 and stop valves 24 to special separating steam traps 25 which receive both steam and condensate.
  • the special traps 25 discharge both condensate and extraction steam to a single pipe line 26 which discharges to header 27, (common to the second group) and finally to flash tank 11.
  • the flash steam produced at flash tank 11 is piped through line 28 to a third group through cylinder 29 (third in relation to the travel direction of paper on the machine);
  • This cylinder dryer 29 operates at a lower pressure than the two groups described previously; from it, steam is extracted through pipe 30 to second cylinder dryer 31. From this second dryer 31 steam is also extracted through piping 32 to first cylinder dryer 33.
  • This manner of supplying steam to this group of cylinders produces an automatic pressure drop from one dryer to the next.
  • each cylinder has a lower temperature, in direction of the pressure drop, with the first cylinder in contact with the paper having the lowest temperature.
  • the arrangement provides a temperature gradient, rising in the direction of paper travel. Regulation of the pressure at flash tank 11 permits control of the temperature of the first dryer in order to avoid sticking of the paper because of too high a temperature.
  • each of these three dryers 29, 31 and 33 is through branch lines 34 and stop valves 35 to individual special separating traps 36 discharging both the condensates and the extraction steam through pipe 37 to final condensate collector tank 38 from where they are pumped to the boiler.
  • the condensate from the flash tank 11 is also discharged, through a normal trap 39 to the condensate collector tank 38.
  • Process for handling fluids in heat transfer apparatus comprising the steps of providing a first group of heat transfer units, feeding steam to this first group, through a common header; connecting the outlets of said heat transfer units to modified steam units to traps that separate condensate and extraction steam; piping the condensate through a common header to a flash tank and feeding the extraction steam to a second group of heat transfer units, through a separator and an air eliminator; in this second group of heat transfer units, the steam is passed through corresponding steam traps, but in this case the steam traps discharge, both the extraction steam and the condensate, together, through a header to the flash tank; said flash tank feeds the flash steam through a pipe to one of the heat transfer units of a third group, that operates at the lowest pressure of all groups; from this unit, steam is extracted to the next unit and from the latter to a third unit, producing by this extraction an automatic pressure drop from one unit to the next.
  • Process for multi-stage handling of fluids in plural heat-transfer stages comprisingthe steps of feeding steam to heat-transfer apparatus of a first of said stages; extracting an outlet flow from said first-stage apparatus, separating said flow into a line of first-stage vapor flow apart from a line of first-stage condensate flow, and feeding said first-stage vapor flow directly to heattransfer apparatus of a second of said stages; extracting an outlet flow from said second-stage apparatus, separating said last-mentioned flow into a line of secondstage vapor flow apart from a line of second-stage condensate flow, and directly utilizing the second-stage vapor flow in a third heat-transfer apparatus.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
US00322192A 1972-08-14 1973-01-09 Process for handling fluids in heat transfer equipment Expired - Lifetime US3828843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/503,626 USRE29790E (en) 1973-01-09 1974-09-06 Process for handling fluids in heat transfer equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MX13774472 1972-08-14

Publications (1)

Publication Number Publication Date
US3828843A true US3828843A (en) 1974-08-13

Family

ID=19745381

Family Applications (1)

Application Number Title Priority Date Filing Date
US00322192A Expired - Lifetime US3828843A (en) 1972-08-14 1973-01-09 Process for handling fluids in heat transfer equipment

Country Status (7)

Country Link
US (1) US3828843A (sv)
JP (1) JPS4950205A (sv)
BE (1) BE803551A (sv)
CA (1) CA1005321A (sv)
DE (1) DE2340224A1 (sv)
FI (1) FI61570C (sv)
GB (1) GB1441033A (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885620A (en) * 1973-11-13 1975-05-27 Gea Luftkuehler Happel Gmbh Heat-exchange installation for cooling of a heat-exchange liquid
CN102787526A (zh) * 2012-07-09 2012-11-21 李永华 基于尾汽流量控制及热泵技术的生活用纸单缸纸机
CN102889776A (zh) * 2012-11-07 2013-01-23 石家庄工大化工设备有限公司 干燥器废热蒸汽循环利用生产装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5959993A (ja) * 1982-09-22 1984-04-05 株式会社加藤電気商会 ドライヤの蒸気利用システム
US5379528A (en) * 1993-12-09 1995-01-10 J. M. Voith Gmbh Paper making machine drying section steam pressure profile
CN109946104B (zh) * 2019-04-23 2024-05-03 陕西科技大学 一种多通道烘缸旋转平台及模拟多通道烘缸旋转传热测试系统

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885620A (en) * 1973-11-13 1975-05-27 Gea Luftkuehler Happel Gmbh Heat-exchange installation for cooling of a heat-exchange liquid
CN102787526A (zh) * 2012-07-09 2012-11-21 李永华 基于尾汽流量控制及热泵技术的生活用纸单缸纸机
CN102889776A (zh) * 2012-11-07 2013-01-23 石家庄工大化工设备有限公司 干燥器废热蒸汽循环利用生产装置
CN102889776B (zh) * 2012-11-07 2015-07-22 石家庄工大化工设备有限公司 干燥器废热蒸汽循环利用生产装置

Also Published As

Publication number Publication date
GB1441033A (en) 1976-06-30
DE2340224A1 (de) 1974-02-28
FI61570C (fi) 1982-08-10
BE803551A (fr) 1973-12-03
JPS4950205A (sv) 1974-05-15
FI61570B (fi) 1982-04-30
CA1005321A (en) 1977-02-15

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