JP6075337B2 - How to replace blast furnace bleeder valve packing - Google Patents

How to replace blast furnace bleeder valve packing Download PDF

Info

Publication number
JP6075337B2
JP6075337B2 JP2014144955A JP2014144955A JP6075337B2 JP 6075337 B2 JP6075337 B2 JP 6075337B2 JP 2014144955 A JP2014144955 A JP 2014144955A JP 2014144955 A JP2014144955 A JP 2014144955A JP 6075337 B2 JP6075337 B2 JP 6075337B2
Authority
JP
Japan
Prior art keywords
heat insulating
packing
bleeder valve
blast furnace
insulating hood
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.)
Active
Application number
JP2014144955A
Other languages
Japanese (ja)
Other versions
JP2016020534A (en
Inventor
航 鈴木
航 鈴木
清隆 深川
清隆 深川
泰 長田
泰 長田
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.)
JFE Steel Corp
Original Assignee
JFE 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 JFE Steel Corp filed Critical JFE Steel Corp
Priority to JP2014144955A priority Critical patent/JP6075337B2/en
Publication of JP2016020534A publication Critical patent/JP2016020534A/en
Application granted granted Critical
Publication of JP6075337B2 publication Critical patent/JP6075337B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Lift Valve (AREA)

Description

本発明は、高炉の炉頂に設置されているブリーダー弁のパッキンの取替方法に関するものである。   The present invention relates to a method for replacing packing of a bleeder valve installed at the top of a blast furnace.

通常、図１に示すように、高炉１の炉頂にはブリーダー弁１０が設置されている（例えば、特許文献１参照）。   Usually, as shown in FIG. 1, the bleeder valve 10 is installed in the top of the blast furnace 1 (for example, refer patent document 1).

何らかの原因で、高炉１内の圧力が所定の設定圧力を超えて上昇した場合に、高炉設備の保護のために、ブリーダー弁１０を開放して、炉内ガスを大気中に放出して、高炉１内の圧力を下げるようにしている。   If for some reason the pressure in the blast furnace 1 rises above a predetermined set pressure, the bleeder valve 10 is opened to release the gas in the furnace to the atmosphere to protect the blast furnace equipment. The pressure in 1 is lowered.

図２は、ブリーダー弁１０が閉鎖状態になっている場合を示す縦断面図であり、図３は、ブリーダー弁１０が開放状態になっている場合を示す縦断面図である。   FIG. 2 is a longitudinal sectional view showing a case where the bleeder valve 10 is in a closed state, and FIG. 3 is a longitudinal sectional view showing a case where the bleeder valve 10 is in an opened state.

図２、図３に示すように、ブリーダー弁１０は、略円筒形のケース１１の内部に、逆円錐状の弁体１２が配置されており、弁体１２に取り付けられている弁体昇降用部材１３を介して弁体昇降機構（図示せず）によって、弁体１２が昇降するようになっている。   As shown in FIGS. 2 and 3, the bleeder valve 10 has an inverted conical valve body 12 disposed in a substantially cylindrical case 11, and is used for raising and lowering a valve body attached to the valve body 12. The valve body 12 is moved up and down by a valve body lifting mechanism (not shown) via the member 13.

すなわち、図２に示すように、ブリーダー弁１０を閉鎖する場合には、弁体１２を上昇させて、弁体１２の上面とケース１１の上端部下面とを当接させる。一方、図３に示すように、ブリーダー弁１０を開放する場合には、弁体１２を下降させて、弁体１２の上面とケース１１の上端部下面との間に隙間を設け、その隙間を経由して炉内ガスが大気中に放出されるようになる。   That is, as shown in FIG. 2, when closing the bleeder valve 10, the valve body 12 is raised to bring the upper surface of the valve body 12 into contact with the lower surface of the upper end of the case 11. On the other hand, as shown in FIG. 3, when opening the bleeder valve 10, the valve body 12 is lowered to provide a gap between the upper surface of the valve body 12 and the lower surface of the upper end portion of the case 11. The in-furnace gas is released into the atmosphere via.

そして、図２のように、弁体１２の上面とケース１１の上端部下面とを当接させた際に、その間のシール性を向上させるために、ケース１１の上端部下面部にパッキン１９が取り付けられている。   Then, as shown in FIG. 2, when the upper surface of the valve body 12 and the lower surface of the upper end of the case 11 are brought into contact with each other, a packing 19 is provided on the lower surface of the upper end of the case 11 in order to improve the sealing performance between them. It is attached.

このパッキン１９は、通常、高炉１の一時停止（休風）の時に毎回取替えを行う。   This packing 19 is normally replaced every time the blast furnace 1 is temporarily stopped (resting wind).

その際には、ブリーダー弁１０を図３に示したような開放状態にして、ケース１１の上方から作業員がパッキン１９の取替作業を行う。   At that time, the bleeder valve 10 is opened as shown in FIG. 3, and an operator replaces the packing 19 from above the case 11.

特開昭５３−９６９０３号公報JP-A-53-96903

上述したように、ブリーダー弁１０のパッキン１９の取替を行う際には、高炉１の一時停止（休風）の時に、ブリーダー弁１０を開放状態にして、ケース１１の上方から作業員がパッキン１９の取替作業を行うことになるが、ブリーダー弁１０を開放状態にすると、しばらくは高温（例えば、１６０℃〜１２０℃）の炉内ガスがケース１１の上部を通過して大気中に放出されるため、通過する炉内ガスの温度がパッキン取替作業の可能な温度（例えば、１００℃以下）になるまで、長時間の待ち時間（例えば、２４時間）が必要となっていた。   As described above, when replacing the packing 19 of the bleeder valve 10, the bleeder valve 10 is opened when the blast furnace 1 is temporarily stopped (windless), and an operator can install the packing from above the case 11. However, when the bleeder valve 10 is opened, the furnace gas at a high temperature (for example, 160 ° C. to 120 ° C.) passes through the upper part of the case 11 and is released into the atmosphere. Therefore, a long waiting time (for example, 24 hours) is required until the temperature of the passing gas in the furnace reaches a temperature at which the packing replacement work can be performed (for example, 100 ° C. or less).

このような長時間の待ち時間（ロスタイム）は、高炉１を再稼動させる際のネック要因になる可能性をはらんでいる。   Such a long waiting time (loss time) may cause a bottleneck when the blast furnace 1 is restarted.

本発明は、上記のような事情に鑑みてなされたものであり、高炉の炉頂に設置されているブリーダー弁のパッキンの取替を行う際に、待ち時間（ロスタイム）を短縮して、効率的にパッキンの取替を行うことができる高炉ブリーダー弁パッキンの取替方法を提供することを目的とするものである。   The present invention has been made in view of the circumstances as described above. When replacing the packing of the bleeder valve installed at the top of the blast furnace, the waiting time (loss time) is shortened and the efficiency is improved. It is an object of the present invention to provide a method for replacing a blast furnace bleeder valve packing that can replace the packing.

上記課題を解決するために、本発明は以下の特徴を有している。   In order to solve the above problems, the present invention has the following features.

［１］高炉の炉頂に設置されているブリーダー弁において、弁体の上面と当接するケースの上端部下面に取り付けられているパッキンの取替を行うに際して、弁体を降下させてブリーダー弁を開放状態にした後、弁体の上方に防熱フードを設置して、炉内ガスがその防熱フード内を通過して大気中に放出されるようにしてから、パッキンの取替作業を行うことを特徴とする高炉ブリーダー弁パッキンの取替方法。   [1] In the bleeder valve installed at the top of the blast furnace, when replacing the packing attached to the lower surface of the upper end of the case that contacts the upper surface of the valve body, the bleeder valve is lowered by lowering the valve body After opening the valve body, install a heat insulation hood above the valve body so that the gas in the furnace passes through the heat insulation hood and is released into the atmosphere before replacing the packing. Blast furnace bleeder valve packing replacement method.

［２］防熱フードの下端部とケースの側面との間に、炉内ガスが通過する隙間が生じる場合は、その隙間を耐熱性断熱材によって塞ぐことを特徴とする前記［１］に記載の高炉ブリーダー弁パッキンの取替方法。   [2] The gap according to [1], wherein a gap through which the gas in the furnace passes is formed between the lower end portion of the heat insulating hood and the side surface of the case, and the gap is closed with a heat-resistant heat insulating material. Replacement method for blast furnace bleeder valve packing.

［３］前記［１］または［２］に記載の高炉ブリーダー弁パッキンの取替方法において用いる防熱フードであって、周方向に複数の防熱フード片に分割されていて、それぞれの防熱フード片が所定の位置に設置された後、それらの防熱フード片が連結されて防熱フードとなることを特徴とする防熱フード。   [3] A heat insulating hood used in the method for replacing a blast furnace bleeder valve packing according to [1] or [2], wherein the heat insulating hood pieces are divided into a plurality of heat insulating hood pieces in the circumferential direction. After being installed in a predetermined position, the heat insulating hood pieces are connected to form a heat insulating hood.

本発明においては、高炉の炉頂に設置されているブリーダー弁のパッキンの取替を行う際に、待ち時間（ロスタイム）を短縮して、効率的にパッキンの取替を行うことができる。   In the present invention, when replacing the packing of the bleeder valve installed at the top of the blast furnace, the waiting time (loss time) can be shortened and the packing can be replaced efficiently.

高炉炉頂にブリーダー弁が設置されていることを示す図である。It is a figure which shows that the bleeder valve is installed in the blast furnace top. ブリーダー弁が閉鎖状態になっている場合を示す図である。It is a figure which shows the case where a bleeder valve is a closed state. ブリーダー弁が開放状態になっている場合を示す図である。It is a figure which shows the case where the bleeder valve is an open state. 本発明の一実施形態を示す図である。It is a figure which shows one Embodiment of this invention. 本発明の一実施形態において用いる防熱フードを示す図である。It is a figure which shows the heat insulation hood used in one Embodiment of this invention. 本発明の実施例の効果を示す図である。It is a figure which shows the effect of the Example of this invention.

本発明の一実施形態を図面に基づいて説明する。   An embodiment of the present invention will be described with reference to the drawings.

本発明の一実施形態では、図１に示したような、高炉１の炉頂に設置されているブリーダー弁１０において、図２に示したような、逆円錐状の弁体１２の上面と当接する略円筒形のケース１１の上端部下面に取り付けられているパッキン１９の取替を行うに際して、図３に示すように、弁体１２を降下させてブリーダー弁１０を開放状態にした後、図４に示すように、弁体１２の上方に防熱フード２１を設置して、炉内ガスが防熱フード２１内を通過して大気中に放出されるようにしてから、作業員がパッキン１９の取替作業を行うようにしている。   In one embodiment of the present invention, the bleeder valve 10 installed at the top of the blast furnace 1 as shown in FIG. 1 is in contact with the upper surface of the inverted conical valve body 12 as shown in FIG. When the packing 19 attached to the lower surface of the upper end of the substantially cylindrical case 11 in contact is replaced, the valve body 12 is lowered to open the bleeder valve 10 as shown in FIG. As shown in FIG. 4, a heat insulating hood 21 is installed above the valve body 12 so that the gas in the furnace passes through the heat insulating hood 21 and is released into the atmosphere. I am trying to do replacement work.

なお、防熱フード２１の下端部とケース１１の側面との間に、炉内ガスが通過する隙間が生じる場合は、図４に示すように、その隙間を耐熱性断熱材（セラッミクファイバー）２２によって塞いで、炉内ガスが通過しないようにする。   In addition, when the clearance gap through which the gas in a furnace passes arises between the lower end part of the thermal insulation hood 21 and the side surface of the case 11, as shown in FIG. 4, the clearance gap is made by the heat resistant heat insulating material (ceramic fiber) 22. Close and prevent furnace gas from passing through.

図５は、使用する防熱フード２１を示すものである。防熱フード２１は、厚さ２．０ｍｍ程度の鋼板製であり、図５（ａ）に示すような、周方向に複数個（ここでは４個）に分割された防熱フード片２１ａで構成されていて、それぞれの防熱フード片２１ａが、図４に示したような、弁体１２の上方の所定の位置に設置された後、それらの防熱フード片２１ａが連結されて、図５（ｂ）に示すような、防熱フード２１となるようになっている。   FIG. 5 shows the heat insulating hood 21 to be used. The thermal insulation hood 21 is made of a steel plate having a thickness of about 2.0 mm, and is configured by a thermal insulation hood piece 21a divided into a plurality (four in this case) in the circumferential direction as shown in FIG. Then, after each of the heat insulating hood pieces 21a is installed at a predetermined position above the valve body 12 as shown in FIG. 4, the heat insulating hood pieces 21a are connected to each other as shown in FIG. As shown, a heat insulating hood 21 is formed.

これによって、この実施形態においては、ブリーダー弁１０のパッキン１９の取替を行うに際して、炉内ガスが防熱フード２１内を通過して大気中に放出されるようになるので、パッキン１９近傍のガス温度（雰囲気温度）が急速に低下し、短時間の内に、パッキン取替作業が可能な温度（例えば、１００℃以下）となる。これによって、待ち時間（ロスタイム）が短縮されて、効率的にパッキン１９の取替作業を行うことができる。   Accordingly, in this embodiment, when the packing 19 of the bleeder valve 10 is replaced, the gas in the furnace passes through the heat insulating hood 21 and is released into the atmosphere. The temperature (atmosphere temperature) is rapidly lowered to a temperature (for example, 100 ° C. or lower) at which the packing replacement operation can be performed within a short time. Accordingly, the waiting time (loss time) is shortened, and the replacement work of the packing 19 can be performed efficiently.

加えて、パッキン１９が高温の炉内ガスに晒される時間も大幅に減少するので、パッキン１９の寿命延長にもつながる。   In addition, since the time during which the packing 19 is exposed to the high-temperature furnace gas is significantly reduced, the life of the packing 19 is extended.

本発明の実施例として、上記の本発明の一実施形態に基づいて、ブリーダー弁１０のパッキン１９の取替を行った。   As an example of the present invention, the packing 19 of the bleeder valve 10 was replaced based on the above-described embodiment of the present invention.

その際のパッキン１９近傍のガス温度（雰囲気温度）の経時的変化を図６に示す。   FIG. 6 shows changes with time in the gas temperature (atmosphere temperature) in the vicinity of the packing 19 at that time.

図６に示すように、ブリーダー弁１０を開放状態にした後に、１６０℃〜１３０℃であったパッキン１９近傍のガス温度（雰囲気温度）が、防熱フード２１（耐熱性断熱材２２も含めて）を設置することによって急速に低下し、３０分程度の間に、パッキン取替作業可能温度（ここでは、１００℃以下）になっている。   As shown in FIG. 6, after the bleeder valve 10 is opened, the gas temperature (atmosphere temperature) in the vicinity of the packing 19 that was 160 ° C. to 130 ° C. is the heat insulating hood 21 (including the heat resistant heat insulating material 22). The temperature is rapidly decreased by installing the gas, and the temperature for packing replacement work is reached (in this case, 100 ° C. or less) in about 30 minutes.

なお、図６の破線は、従来のように、防熱フード２１を設置しなかった場合の温度変化を示すものであり、パッキン取替作業可能温度（ここでは、１００℃以下）になるまでに、長時間の待ち時間（ロスタイム）が生じることが分かる。   In addition, the broken line of FIG. 6 shows the temperature change at the time of not installing the heat insulation hood 21 like the past, and until it becomes packing replacement work possible temperature (here 100 degrees C or less), It can be seen that a long waiting time (loss time) occurs.

これによって、本発明の有効性が確認された。   This confirmed the effectiveness of the present invention.

１ 高炉
１０ ブリーダー弁
１１ ケース
１２ 弁体
１３ 弁体昇降用部材
１９ パッキン
２１ 防熱フード
２２ 耐熱性断熱材（セラミックファイバー） DESCRIPTION OF SYMBOLS 1 Blast furnace 10 Breeder valve 11 Case 12 Valve body 13 Valve body raising / lowering member 19 Packing 21 Thermal insulation hood 22 Heat resistant heat insulating material (ceramic fiber)

Claims (3)

高炉の炉頂に設置されているブリーダー弁において、弁体の上面と当接するケースの上端部下面に取り付けられているパッキンの取替を行うに際して、弁体を降下させてブリーダー弁を開放状態にした後、弁体の上方に防熱フードを設置して、炉内ガスがその防熱フード内を通過して大気中に放出されるようにしてから、パッキンの取替作業を行うことを特徴とする高炉ブリーダー弁パッキンの取替方法。   In the bleeder valve installed at the top of the blast furnace, when replacing the packing attached to the lower surface of the upper end of the case that contacts the upper surface of the valve body, the valve body is lowered to open the bleeder valve. After that, a heat insulating hood is installed above the valve body so that the gas in the furnace passes through the heat insulating hood and is released into the atmosphere, and then the packing is replaced. Replacement method for blast furnace bleeder valve packing. 防熱フードの下端部とケースの側面との間に、炉内ガスが通過する隙間が生じる場合は、その隙間を耐熱性断熱材によって塞ぐことを特徴とする請求項１に記載の高炉ブリーダー弁パッキンの取替方法。   2. The blast furnace bleeder valve packing according to claim 1, wherein a gap through which the gas in the furnace passes is formed between the lower end portion of the heat insulating hood and the side surface of the case, and the gap is closed with a heat-resistant heat insulating material. Replacement method. 請求項１または２に記載の高炉ブリーダー弁パッキンの取替方法において用いる防熱フードであって、周方向に複数の防熱フード片に分割されていて、それぞれの防熱フード片が所定の位置に設置された後、それらの防熱フード片が連結されて防熱フードとなることを特徴とする防熱フード。   A heat insulating hood used in the method for replacing a blast furnace bleeder valve packing according to claim 1 or 2, wherein the heat insulating hood is divided into a plurality of heat insulating hood pieces in a circumferential direction, and each heat insulating hood piece is installed at a predetermined position. Then, the heat insulating hood pieces are connected to form a heat insulating hood.
JP2014144955A 2014-07-15 2014-07-15 How to replace blast furnace bleeder valve packing Active JP6075337B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014144955A JP6075337B2 (en) 2014-07-15 2014-07-15 How to replace blast furnace bleeder valve packing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014144955A JP6075337B2 (en) 2014-07-15 2014-07-15 How to replace blast furnace bleeder valve packing

Publications (2)

Publication Number Publication Date
JP2016020534A JP2016020534A (en) 2016-02-04
JP6075337B2 true JP6075337B2 (en) 2017-02-08

Family

ID=55265540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014144955A Active JP6075337B2 (en) 2014-07-15 2014-07-15 How to replace blast furnace bleeder valve packing

Country Status (1)

Country Link
JP (1) JP6075337B2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914722Y1 (en) * 1970-09-16 1974-04-12
JPS5623316Y2 (en) * 1976-08-02 1981-06-01
JP2508687Y2 (en) * 1990-12-06 1996-08-28 ヤマハ株式会社 Heat treatment furnace
JPH08311527A (en) * 1995-05-10 1996-11-26 Daido Steel Co Ltd Vacuum refining vessel
JP2000104107A (en) * 1998-09-29 2000-04-11 Nkk Corp Method for changing brick in burner part of combustion chamber in hot blast stove and its device
JP2002241818A (en) * 2001-02-20 2002-08-28 Azuma Tekko Kk Hot blast control valve
JP5849627B2 (en) * 2011-11-11 2016-01-27 Ｊｆｅスチール株式会社 Dust collector and dust collection method for agitation desulfurizer

Also Published As

Publication number Publication date
JP2016020534A (en) 2016-02-04

Similar Documents

Publication Publication Date Title
CA2946918C (en) Sleeve seal for electric furnace electrodes
CN105258153A (en) Device and method for automatic power-off and failure protection of incinerator burner
JP2018150424A (en) Method for hot rearrangement-repairing oven brick of coke oven
CN203572230U (en) Heating furnace explosion door
JP6075337B2 (en) How to replace blast furnace bleeder valve packing
PH12015502190A1 (en) Method of extending life expectancy of high-temperature piping and life expectancy extension structure of high-temperature piping
CN106122568A (en) A kind of pneumatic control valve
KR101385416B1 (en) Method for repairing coke oven
JP5540627B2 (en) Damage prevention method for blast furnace top bottom seal valve packing
CN104006658A (en) Method for repairing inner wall on top of smoke collection cover of metallurgical furnace
CN203823096U (en) High-temperature-resistant sealing butterfly valve
CN103059882B (en) The method of flue rotating plate shaft is changed when coke oven is normally produced
CN101957133B (en) System and method for ceaselessly supplying heat transfer oil for afterheat heat medium boiler of rotary kiln
CN104893744B (en) A kind of dry coke quenching furnace roof bleeding device
CN106090338A (en) Pneumatic control valve
CN103883746A (en) High-temperature-resistant and irradiation-resistant air valve with elastic metal pieces
CN203869076U (en) Device for protecting gas heat exchanger
CN203857814U (en) Furnace door self-sealing device for small and medium size bogie-hearth resistance furnace
CN103779258A (en) Heating device of semiconductor heat treatment device, service part of heating device and repair method of heating device
CN106195315A (en) A kind of pneumatic control combinaing valve body mechanism
CN106090339A (en) Pneumatic control combinaing valve body mechanism
CN208311582U (en) A kind of bursting diaphragm for angle controllable type of releasing
CN203906918U (en) High-pressure safety dump valve for ethylene cracking furnace
CN202452842U (en) Device for maintaining in-furnace environment stability of heating furnace
US867244A (en) Safety device for blast-furnaces.

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160223

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20161128

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20161213

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20161226

R150 Certificate of patent or registration of utility model

Ref document number: 6075337

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250