JPS54119392A - Heating tube of economizer in contact type sulfuric acid manufacturing apparatus - Google Patents

Heating tube of economizer in contact type sulfuric acid manufacturing apparatus

Info

Publication number
JPS54119392A
JPS54119392A JP2741878A JP2741878A JPS54119392A JP S54119392 A JPS54119392 A JP S54119392A JP 2741878 A JP2741878 A JP 2741878A JP 2741878 A JP2741878 A JP 2741878A JP S54119392 A JPS54119392 A JP S54119392A
Authority
JP
Japan
Prior art keywords
sulfuric acid
tube
economizer
contg
feed water
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.)
Pending
Application number
JP2741878A
Other languages
Japanese (ja)
Inventor
Kadoaki Ueda
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen 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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP2741878A priority Critical patent/JPS54119392A/en
Publication of JPS54119392A publication Critical patent/JPS54119392A/en
Pending legal-status Critical Current

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  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

PURPOSE: To avoid dewing of sulfuric acid and prevent corrosion of fins and heating tubes by putting a tube of small size into each heating tube in the vicinity of a SO3-contg. gas outlet out of the boiler feed water heating finned tubes of an economizer incorporated in a contact type sulfuric acid manufacturing apparatus.
CONSTITUTION: SO3-contg. gas 4 is introduced into body 1 of the economizer at about 430°C and cooled to 180W220°C suitable for the next SO3 absorbing process. On the other hand, boiler feed water 9 enters heating tube 5 at 105°C and flows in the countercurrent direction of gas 4 to be heated. In a conventional economizer, the surface temp. of fin metal becomes 120W130 C in the vicinity of SO3-contg. gas outlet part 3 owing to boiler feed water 9 fed at low temp. to dew sulfuric acid. In the exonomizer of this invention, tube 11 is put in each tube 5 at the lower side stage with aluminum foil 12, etc. in-between to raise heat transfer resistance in the tube. Thus, the surface temp. of fin metal can be raised to above the dew point of sulfuric acid.
COPYRIGHT: (C)1979,JPO&Japio
JP2741878A 1978-03-09 1978-03-09 Heating tube of economizer in contact type sulfuric acid manufacturing apparatus Pending JPS54119392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2741878A JPS54119392A (en) 1978-03-09 1978-03-09 Heating tube of economizer in contact type sulfuric acid manufacturing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2741878A JPS54119392A (en) 1978-03-09 1978-03-09 Heating tube of economizer in contact type sulfuric acid manufacturing apparatus

Publications (1)

Publication Number Publication Date
JPS54119392A true JPS54119392A (en) 1979-09-17

Family

ID=12220536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2741878A Pending JPS54119392A (en) 1978-03-09 1978-03-09 Heating tube of economizer in contact type sulfuric acid manufacturing apparatus

Country Status (1)

Country Link
JP (1) JPS54119392A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470449A (en) * 1982-04-02 1984-09-11 Monsanto Company Economizer arrangement
US4478809A (en) * 1983-01-20 1984-10-23 Monsanto Company Economizer arrangement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470449A (en) * 1982-04-02 1984-09-11 Monsanto Company Economizer arrangement
US4478809A (en) * 1983-01-20 1984-10-23 Monsanto Company Economizer arrangement

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