JPS55100910A - Control of combustion at time of switching of hot blast stove - Google Patents

Control of combustion at time of switching of hot blast stove

Info

Publication number
JPS55100910A
JPS55100910A JP626379A JP626379A JPS55100910A JP S55100910 A JPS55100910 A JP S55100910A JP 626379 A JP626379 A JP 626379A JP 626379 A JP626379 A JP 626379A JP S55100910 A JPS55100910 A JP S55100910A
Authority
JP
Japan
Prior art keywords
combustion
gas
flow rate
hot blast
calorific value
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
JP626379A
Other languages
Japanese (ja)
Other versions
JPS5740203B2 (en
Inventor
Tatsumi Nakamura
Izumi Shimazoe
Katsutoshi Yasutake
Toshihiro Sakashita
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP626379A priority Critical patent/JPS55100910A/en
Publication of JPS55100910A publication Critical patent/JPS55100910A/en
Publication of JPS5740203B2 publication Critical patent/JPS5740203B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

Landscapes

  • Feeding And Controlling Fuel (AREA)

Abstract

PURPOSE: To prevent the fluctuation of calorific value at the time of switching by a method wherein the flow rate of mixed gas for combustion is gradually increased or decreased depending on response time set by the character of flow rate-regulating valves when a plurality of hot blast stoves attached to a blast furnace are switched from combustion to draft or from draft to combustion.
CONSTITUTION: Blast furnace gas (BFG) having low calorific value and converter gas (LDG) having high calorific value are mixed with liquefied natural gas (LNG) in a mixing chamber 2 to produce gas having appropriate calorific value which is then supplied to hot blast stoves HS1W3. When the hot blast stove HS1 is switched from draft to combustion and the hot blast stove HS2 is switched from combustion to draft, the calorie of the mixed gas is varied by the difference in the response time to switching of flow rate-regulating valves 14 for the mixed gas and flow rate- regulating valves 11W13 for BFG, LDG and LNG. An increase and decrease rate X of the mixed gas at the time of switching is determined by expression I. By the value obtained, the gas flow rate-regulating valves 12W14 are controlled to prevent the variation of the calorific value of the mixed gas. The imperfect combustion of the gas and the reduction in thermal efficiency can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP626379A 1979-01-22 1979-01-22 Control of combustion at time of switching of hot blast stove Granted JPS55100910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP626379A JPS55100910A (en) 1979-01-22 1979-01-22 Control of combustion at time of switching of hot blast stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP626379A JPS55100910A (en) 1979-01-22 1979-01-22 Control of combustion at time of switching of hot blast stove

Publications (2)

Publication Number Publication Date
JPS55100910A true JPS55100910A (en) 1980-08-01
JPS5740203B2 JPS5740203B2 (en) 1982-08-26

Family

ID=11633563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP626379A Granted JPS55100910A (en) 1979-01-22 1979-01-22 Control of combustion at time of switching of hot blast stove

Country Status (1)

Country Link
JP (1) JPS55100910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111766779A (en) * 2020-06-30 2020-10-13 日照钢铁控股集团有限公司 A kind of converter gas and natural gas mixed calorific value ratio stability control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111766779A (en) * 2020-06-30 2020-10-13 日照钢铁控股集团有限公司 A kind of converter gas and natural gas mixed calorific value ratio stability control method
CN111766779B (en) * 2020-06-30 2022-06-07 日照钢铁控股集团有限公司 A kind of converter gas and natural gas mixed calorific value ratio stability control method

Also Published As

Publication number Publication date
JPS5740203B2 (en) 1982-08-26

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