JPS57175899A - Method for automatic temperature control of change- over type heat exchangers in air liquefying separator - Google Patents

Method for automatic temperature control of change- over type heat exchangers in air liquefying separator

Info

Publication number
JPS57175899A
JPS57175899A JP6101081A JP6101081A JPS57175899A JP S57175899 A JPS57175899 A JP S57175899A JP 6101081 A JP6101081 A JP 6101081A JP 6101081 A JP6101081 A JP 6101081A JP S57175899 A JPS57175899 A JP S57175899A
Authority
JP
Japan
Prior art keywords
heat exchangers
temperature
value
change
over type
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
Application number
JP6101081A
Other languages
Japanese (ja)
Other versions
JPH0421118B2 (en
Inventor
Nagatoshi Kanbara
Shoji Takahashi
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.)
Japan Oxygen Co Ltd
Nippon Sanso Corp
Original Assignee
Japan Oxygen Co Ltd
Nippon Sanso Corp
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 Japan Oxygen Co Ltd, Nippon Sanso Corp filed Critical Japan Oxygen Co Ltd
Priority to JP6101081A priority Critical patent/JPS57175899A/en
Publication of JPS57175899A publication Critical patent/JPS57175899A/en
Publication of JPH0421118B2 publication Critical patent/JPH0421118B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Flow Control (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To eliminate uneven temperature distribution among heat exchangers in an air liquefying separator equipped with a plural number of change-over type heat exchangers by providing a control system that is operated on the basis of a control target-value which is temperature in the reheat air main pipe and of controlled variables which are temperatures at reheat air outlets of respective heat exchangers. CONSTITUTION:The symbols 1-n represent a series of change-over type heat exchangers which can be separated into, for example, two groups. The air passage and return impure gas passage can be switched by group. Each heat exchanger is provided with a temperature controller TC1, TC2, TC3,...TCn and an automatic valve RV1, RV2, RV3...RVn in series in the reheat air passage. Control target-value can be set taking a value of temperature Tw at a moment of half a passage-switching cycle where Tw represent a temperature in the reheat air main pipe. Then, deviations of temperatures in the middle of the respective heat exchangers T1, T2...Tn from the control target-value are obtained by the corresponding temperature controllers and respective active and dead zones corresponding to those values are established to control corresponding automatic valves RV1, RV2...RVn.
JP6101081A 1981-04-22 1981-04-22 Method for automatic temperature control of change- over type heat exchangers in air liquefying separator Granted JPS57175899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6101081A JPS57175899A (en) 1981-04-22 1981-04-22 Method for automatic temperature control of change- over type heat exchangers in air liquefying separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6101081A JPS57175899A (en) 1981-04-22 1981-04-22 Method for automatic temperature control of change- over type heat exchangers in air liquefying separator

Publications (2)

Publication Number Publication Date
JPS57175899A true JPS57175899A (en) 1982-10-28
JPH0421118B2 JPH0421118B2 (en) 1992-04-08

Family

ID=13158929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6101081A Granted JPS57175899A (en) 1981-04-22 1981-04-22 Method for automatic temperature control of change- over type heat exchangers in air liquefying separator

Country Status (1)

Country Link
JP (1) JPS57175899A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336896A (en) * 1976-07-30 1978-04-05 Blanc Max A Snorkel
JPS5577697A (en) * 1978-12-06 1980-06-11 Hitachi Ltd Controlling of temperature equivalence in multistage heat exchanger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336896A (en) * 1976-07-30 1978-04-05 Blanc Max A Snorkel
JPS5577697A (en) * 1978-12-06 1980-06-11 Hitachi Ltd Controlling of temperature equivalence in multistage heat exchanger

Also Published As

Publication number Publication date
JPH0421118B2 (en) 1992-04-08

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