JPH03294714A - Blast furnace top gas energy recovery method and removing method for dust in piping of recovery equipment - Google Patents
Blast furnace top gas energy recovery method and removing method for dust in piping of recovery equipmentInfo
- Publication number
- JPH03294714A JPH03294714A JP2093867A JP9386790A JPH03294714A JP H03294714 A JPH03294714 A JP H03294714A JP 2093867 A JP2093867 A JP 2093867A JP 9386790 A JP9386790 A JP 9386790A JP H03294714 A JPH03294714 A JP H03294714A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- blast furnace
- furnace top
- valve
- dust collector
- 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
Links
- 239000000428 dust Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 abstract description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000007796 conventional method Methods 0.000 description 5
- 239000003595 mist Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000010926 purge Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 102100022299 All trans-polyprenyl-diphosphate synthase PDSS1 Human genes 0.000 description 1
- 101710093939 All trans-polyprenyl-diphosphate synthase PDSS1 Proteins 0.000 description 1
- 241001417495 Serranidae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012718 dry electrostatic precipitator Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Electrostatic Separation (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、高炉炉頂ガスの保有する圧力および熱エネル
ギーの回収を、湿式集塵装置と乾式集塵装置とを併用し
て、安価にまた異常事態に容易かつ迅速に対応できる技
術に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention recovers the pressure and thermal energy possessed by blast furnace top gas at low cost by using both a wet dust collector and a dry dust collector. It also relates to technology that can easily and quickly respond to abnormal situations.
〈従来の技術〉
製鉄所の高炉炉頂ガスはガス量も多くかつ高圧なので、
この圧力および熱エネルギーを効率よく回収するために
、第３図に示すようにダストキャツチャ−（以下ＤＣと
略す）３１下流側にヘンヂュリースクラッパー（以下■
Ｓと略す）３２などの湿式集塵装置と高圧バックフィル
ター高圧用電気集塵機などの乾式集塵装置（以下Ｂ Ｉ
） Ｃと略す）３４とを併設しておき、通常はＢＤＣを
運転し高炉炉頂ガス全量をＢＤＣを通過させ、炉頂圧タ
ービン（以下ＴＰＴと略す）３５に高温ガスを供給しエ
ネルギー回収効率の向上を図っている。<Conventional technology> The top gas of blast furnaces in steel plants has a large amount of gas and high pressure.
In order to efficiently recover this pressure and thermal energy, as shown in FIG.
Wet type dust collectors such as 32 (abbreviated as S) and dry type dust collectors such as high pressure back filter and high pressure electric dust collector (hereinafter referred to as B I
) 34 (hereinafter abbreviated as C) is installed, and normally the BDC is operated and the entire blast furnace top gas is passed through the BDC, and high temperature gas is supplied to the top pressure turbine (hereinafter abbreviated as TPT) 35 to improve energy recovery efficiency. We are working to improve this.
この際バタフライ弁２、ゴグル弁４を全開としてここを
経由して、ＢＤＣで集塵された高炉ガスをセプタム弁（
以下Ｓ■と略す）３３のリークガスあるいは遮断弁９を
経由する炉頂装入装置用均圧ガスとして供給している（
特開昭６０−１７４８１１号公報参照）。At this time, the butterfly valve 2 and goggle valve 4 are fully opened, and the blast furnace gas collected by the BDC is passed through the septum valve (
It is supplied as a leak gas of 33 (hereinafter abbreviated as S■) or as pressure equalizing gas for the furnace top charging device via the shutoff valve 9 (
(See Japanese Patent Application Laid-Open No. 174811/1983).
なお、高炉炉頂ガスの異常高温時、またはＢＤＣ，ＴＲ
Ｔを休止せざるをえないときには主にバタフライ弁１そ
の他の弁の開閉や高炉炉頂ガスへの散水などによって高
炉操業を維持している。In addition, when the top gas of the blast furnace is abnormally high, or BDC, TR
When it is necessary to stop the T, the blast furnace operation is maintained mainly by opening and closing the butterfly valve 1 and other valves, and by sprinkling water on the blast furnace top gas.
〈発明が解決しようとする課題〉
しかしながら、前述の湿式集塵装置と乾式集塵装置とを
併設した高炉炉頂ガスエネルギー回収方法にはつぎのよ
うな問題がある。<Problems to be Solved by the Invention> However, the above-mentioned blast furnace top gas energy recovery method that uses both the wet type dust collector and the dry type dust collector has the following problems.
■ 湿式集塵装置ラインと乾式集塵装置ラインとの切換
のためにバタフライ弁１が必要である。■ A butterfly valve 1 is required to switch between the wet type dust collector line and the dry type dust collector line.
■ Ｓ■のリークガス、炉頂装入装置用均圧ガスとして
は、ＢＤＣを通過した高温ガスが供給されるため配管の
散水個所１０での散水による冷却が必要で、かつガス量
変化に伴う１１シ水量制御が必要である。■ As the leak gas of S■ and pressure equalizing gas for the furnace top charging device, high temperature gas that has passed through the BDC is supplied, so it is necessary to cool it by sprinkling water at the water sprinkling point 10 of the piping. It is necessary to control the amount of water.
■ ＴＲＴトリップ時は、ＢＤＣを通過した高温ガスの
全量がバタフライ弁２、ゴグル弁４を経由してＳ■に供
給されるので、散水個所１０では高温ガス全量を冷却で
きるだりの１１シ水ノズルなどの設備が必要である。■ During a TRT trip, the entire amount of high-temperature gas that has passed through the BDC is supplied to S through the butterfly valve 2 and goggle valve 4, so the water nozzle 11 can cool the entire amount of high-temperature gas at the water sprinkling point 10. Such equipment is required.
■ 高炉炉頂ガスが異常高温になる時、ＤＣ内のガス冷
却の１１（水や弁の開閉がうまく動作しない時は、ＢＤ
Ｃ内の濾布を焼損するおそれがある。■ When the top gas of the blast furnace reaches an abnormally high temperature, the gas cooling system in the DC
There is a risk of burning out the filter cloth inside C.
本発明は、上記のような問題を解決し、バタフライ弁１
を必要とせず、高炉炉頂ガスの異常高温、Ｔ ＲＴ ）
リップなどの異常事態に容易に、かつ迅速に対応できる
ような方法を提供する七共に、その発明に係る方法にお
いて、ＤＣから■Ｓまでの配管内にダストが堆積するこ
とを防止する除塵方法を提供するためになされたもので
ある。The present invention solves the above problems and provides a butterfly valve 1.
abnormally high temperature of blast furnace top gas, T RT )
Shichikyo, which provides a method for easily and quickly responding to abnormal situations such as leakage, has developed a dust removal method that prevents dust from accumulating in the piping from DC to ■S in the method according to the invention. It was made to provide.
〈課題を解決するための手段〉
本発明は、■高炉炉頂ガス集塵装置として、ダストキャ
ツチャ−下流側に湿式集塵装置と乾式集塵装置とを併用
し、炉頂圧タービンによって高炉炉頂ガスの保有する圧
力および熱エネルギーを回収するに際し、乾式集塵装置
運転時には、乾式集塵装置通過ガスだけが炉頂圧タービ
ンに供給され、セプタム弁のリークガスおよび炉頂装入
設備の均圧用ガスとしては湿式集塵装置通過ガスが供給
されるようにしたことを特徴とする高炉炉頂ガスエネル
ギー回収方法で、かつ■乾式集塵装置運転時に高炉炉頂
ガスが異常に高温になる時には、炉頂圧タービン」二液
側の炉頂ガス温度センザの信号によって、炉頂圧タービ
ン前に設置された遮断弁を閉にし高炉炉頂ガス全量を湿
式集塵装置側に切換えることを特徴とする前項■記載の
高炉炉頂ガスエネルギー回収方法であり、また■前項■
記載の高炉炉頂ガスエネルギー回収方法に用いる設備に
おいて、乾式集塵装置のバグフィルタの逆洗ファンから
吐出する高炉ガスを、ダストキャツチャーからペンチユ
リ−スフランパーまでの配管内に」二液側から順次下流
側に吹きつけて、配管内におけるダストの堆積を防止す
ることを特徴とする高炉炉頂ガス回収設備の配管内除塵
方法である。<Means for Solving the Problems> The present invention consists of: (1) As a blast furnace top gas dust collector, a wet dust collector and a dry dust collector are used together on the downstream side of the dust catcher, and the blast furnace top pressure turbine To recover the pressure and thermal energy possessed by the furnace top gas, when the dry dust collector is in operation, only the gas passing through the dry dust collector is supplied to the furnace top pressure turbine, and the leakage gas from the septum valve and the equalization of the furnace top charging equipment are A blast furnace top gas energy recovery method characterized in that gas passing through a wet dust collector is supplied as pressure gas, and ■ When the blast furnace top gas becomes abnormally high temperature during operation of the dry dust collector. The blast furnace top pressure turbine is characterized by a signal from a top gas temperature sensor on the two-liquid side to close a shutoff valve installed in front of the top pressure turbine and switch the entire amount of blast furnace top gas to the wet dust collector side. This is the blast furnace top gas energy recovery method described in the previous section ■, and also the method described in the previous section ■
In the equipment used for the above-mentioned blast furnace top gas energy recovery method, the blast furnace gas discharged from the backwash fan of the bag filter of the dry dust collector is passed into the piping from the dust catcher to the pentillary flanper in order from the two-liquid side. This is a method for removing dust inside a pipe of a blast furnace top gas recovery facility, which is characterized by blowing downstream to prevent dust from accumulating inside the pipe.
く作 用〉
本発明に係る方法を第１図および第２図に従って説明す
る。Effects> The method according to the present invention will be explained with reference to FIGS. 1 and 2.
本発明ではＢＤＣ運転時には、バタフライ弁２、ゴグル
弁４を閉じ、Ｓ■のリークガスおよび炉頂装入装置用均
圧ガスとしては、ＢＤＣは経由・ｌず■Ｓを３ＴＩ遇し
た高炉ガスが供給される。従って■Ｓに常時散水してお
ａＪば供給される高炉ガスは■Ｓで冷却されるので、従
来のように散水個所１０での散水設備は不要となる。In the present invention, during BDC operation, the butterfly valve 2 and the goggle valve 4 are closed, and the blast furnace gas that has passed through the BDC and has undergone 3TIs of S is supplied as leak gas of S and pressure equalization gas for the furnace top charging device. be done. Therefore, since the blast furnace gas supplied by constant water sprinkling to ■S is cooled by ■S, the water sprinkling equipment at the water sprinkling point 10 as in the past is not required.
ＴＰＴ １〜９７１時は、同時にその直前にある遮断弁
８が閉じるので、高炉炉頂ガスはＢＤＣに流れずＶＳを
通過しＳＶに流れる。従って前述のケースと同様にＶＳ
で冷却されるので、特別なガス冷却設備は不要で、また
他の弁を操作−Ｕずに瞬時にＢＤＣからＶＳへの切換が
できる。During TPT 1 to 971 hours, the shutoff valve 8 immediately in front closes at the same time, so the blast furnace top gas does not flow to the BDC, but passes through the VS and flows to the SV. Therefore, as in the previous case, VS
Since the gas is cooled by the gas, no special gas cooling equipment is required, and switching from BDC to VS can be instantaneously performed without operating other valves.
高炉炉頂ガスが異常高温になる時は、炉頂、アップティ
クなど炉頂圧タービン」１流側の炉頂ガス温度セン４Ｊ
の信号によって遮断弁８を閉じて、高炉炉頂ガス全量を
ＢＤＣからＶＳに切換えることができるのでＢＤＣの濾
布の焼損を防ぐことができる。When the top gas of the blast furnace reaches an abnormally high temperature, use the top gas temperature sensor 4J on the 1st stream side of the furnace top pressure turbine such as the furnace top or uptick.
The shutoff valve 8 can be closed in response to the signal, and the total amount of blast furnace top gas can be switched from BDC to VS, thereby preventing the filter cloth of BDC from being burnt out.
本発明に係る方法によると、従来設置されていたバタフ
ライ弁１を全く必要とせず、バタフライ弁１は撤去する
ことができる。According to the method according to the present invention, the conventionally installed butterfly valve 1 is not required at all, and the butterfly valve 1 can be removed.
本発明方法でＢＤＣ運転時には、前述のとおりＳＶのリ
ークガスおよび炉頂装入装置用均圧ガスはＤＣ，ＶＳを
通過する。しかしＳｖのリークガス量は全発生ガス量の
２〜３％と少なく、配管（例：３７００ｍｍφ）内のガ
ス流速は例えば０．２ｍ／ｓ程度と極めて低速となり、
配管内にダストが堆積するという新たな問題が生じた。During BDC operation in the method of the present invention, the leak gas from the SV and the pressure equalizing gas for the furnace top charging device pass through the DC and VS as described above. However, the amount of Sv leak gas is small at 2 to 3% of the total amount of gas generated, and the gas flow rate in the pipe (e.g. 3700 mmφ) is extremely low, for example, about 0.2 m/s.
A new problem arose: dust buildup inside the pipes.
ここで、この問題の解決のため検羽を重ねた結果、ＢＤ
Ｃの逆洗ファン１１は、常時使用でなく、ある゛す゛イ
クルで使用されているため、その空き時間に吐出高炉ガ
スのエネルギーをダスト移送に利用できるとの知見を得
て、この知見にもとづいて問題を解決した。As a result of repeated inspection to solve this problem, we found that BD
Since the backwashing fan 11 of C is not used all the time, but is used in certain cycles, we learned that the energy of the discharged blast furnace gas can be used for dust transfer during the free time, and based on this knowledge, I solved the problem.
すなわち第３図に示すようにＤＣ−ＶＳ間配管１２に適
当な間隔にオン・オフ弁１６付パージ用ノズル１５を配
設し、ＤＣ側から下流側に順次ノズルを開閉しながら、
逆洗ファンからの吐出高炉ガスを、配管内上流側から下
流側に吹きつけダストをＶＳ側に移送して、ダストの堆
積を防止できる。That is, as shown in FIG. 3, purge nozzles 15 with on/off valves 16 are arranged at appropriate intervals in the DC-VS piping 12, and while sequentially opening and closing the nozzles from the DC side to the downstream side,
The blast furnace gas discharged from the backwash fan is blown from the upstream side to the downstream side in the piping to transfer the dust to the VS side, thereby preventing the accumulation of dust.
逆洗ファンの吐出高炉ガス量は配管１２内を流れるガス
量の約１／６程度であるので、配管内への吐出高炉ガス
の吹きつりタイミングは、本実施例では炉頂装入装置の
均圧ガス供給と同時にすることとした。Since the amount of blast furnace gas discharged by the backwash fan is approximately 1/6 of the amount of gas flowing through the pipe 12, the timing of blowing the blast furnace gas discharged into the pipe is adjusted to the uniformity of the furnace top charging device in this embodiment. It was decided to do this at the same time as the pressure gas supply.
〈実施例〉
本発明に係る方法の実施例を第１図、第２図に従って以
下に説明する。<Example> An example of the method according to the present invention will be described below with reference to FIGS. 1 and 2.
ケースＩ：ＢＤＣを運転し、Ｔ ＲＴを運転する場合
ハタフライブｔ２、ゴグル弁４を閉じ、バタフライ弁３
、ゴグル弁５．６、遮断弁８、Ｎ Ｋ弁７を開とし、Ｔ
ＲＴはＢＤＣを通過した高温ガスによって運転され、Ｓ
Ｖは閉とされるがＳＶのリークガスと炉頂装入装置用均
圧ガスはＶＳを通過した高炉ガスによって供給される。Case I: When operating BDC and operating T RT, close grouper live t2, goggle valve 4, and butterfly valve 3.
, goggle valve 5.6, cutoff valve 8, NK valve 7 are opened, and T
RT is operated by hot gas passed through BDC, and S
Although the V is closed, the leak gas of the SV and the pressure equalizing gas for the furnace top charging device are supplied by the blast furnace gas that has passed through the VS.
ＶＳは、常時高炉炉頂ガス全発生量に対応する散水が行
われている。従ってＴＲＴがトリップして遮断弁８が閉
じても、ＢＤＣを通過していた高炉炉頂ガスを瞬時にＶ
Ｓ側に切換えることができる。In the VS, water is constantly sprinkled in an amount corresponding to the total amount of blast furnace top gas generated. Therefore, even if the TRT trips and the shutoff valve 8 closes, the blast furnace top gas that has passed through the BDC is instantly
It can be switched to the S side.
高炉炉頂ガスが高炉のスリップなどでＢＤＣの濾布の耐
熱温度（約２００°Ｃ）より高温になる時はＤＣ内でミ
ス１〜スプレイして高炉ガスを冷却している。通常の操
業では３００°Ｃ位までを考えてミストスプレィ能力を
決めておけばよいが、高炉のスリップ時には１０００°
Ｃにも達するので、従来法では１０００°Ｃ対応のミス
トスプレィ設備も必要であった。When the blast furnace top gas becomes higher than the heat resistance temperature (approximately 200°C) of the BDC filter cloth due to blast furnace slip, etc., the blast furnace gas is cooled by spraying in the DC. In normal operations, it is sufficient to determine the mist spray capacity by considering temperatures up to about 300°C, but when the blast furnace slips, it can reach up to 1000°C.
Since the temperature can reach as high as 1,000°C, the conventional method also required mist spray equipment capable of handling 1000°C.
本発明では、このような時は、高炉ガス温度を検知した
ら、直ちに遮断弁８を閉して、ＢＤＣからｖＳに切換え
ることによって、ＢＤＣの濾布を守ることができるので
、ＤＣ内のミストスプレィ能力も３００°Ｃまでの設備
で高炉のスリップ対応が可能である。In the present invention, in such a case, the filter cloth of BDC can be protected by immediately closing the shutoff valve 8 and switching from BDC to vS as soon as the blast furnace gas temperature is detected, so that the mist spray in DC can be protected. The equipment has a capacity of up to 300°C and can handle blast furnace slippage.
従来法では、ＢＤＣ運転時にはＳＶ廻りが８０〜１２０
°Ｃになるので、ＳＶのシール材の耐熱性アップ、ダク
トの熱膨張対策としての伸縮継手が必要であったが、本
発明ではＳＶ廻りには■Ｓ通過の高炉ガスがくるこ七に
なるので、従来法のようなシール材の耐熱性アップや熱
膨張対策は不要となった。In the conventional method, the SV rotation is 80 to 120 during BDC operation.
°C, it was necessary to improve the heat resistance of the SV sealing material and to install expansion joints as a measure against thermal expansion of the duct.However, in the present invention, the blast furnace gas passing through the S is placed around the SV. Therefore, it is no longer necessary to increase the heat resistance of the sealing material or take measures against thermal expansion, which are required in conventional methods.
ケースＩＩ：ＴＲＴ定検の場合
バタフライ弁２．３、ゴグル弁４．５．６、遮断弁８お
よびＮＫ弁７を閉じ、高炉炉頂ガス全量をＶＳに流し炉
頂圧は５Ｖ３３で制御する。Case II: In the case of TRT periodic inspection, the butterfly valve 2.3, goggle valve 4.5.6, shutoff valve 8, and NK valve 7 are closed, the entire blast furnace top gas is allowed to flow to VS, and the furnace top pressure is controlled at 5V33.
ケース■：湿式集塵装置を運転しＴＲＴを運転する場合
バタフライ弁３、ゴグル弁５．６を閉じ、バクフライ弁
２、ゴグル弁４、遮断弁８およびＮＫ弁７を開にして、
ＳＶは閉じ、ＴＰＴは湿式高炉ガスによって運転される
。Case ■: When operating the wet dust collector and TRT, close the butterfly valve 3 and goggle valve 5.6, open the butterfly valve 2, goggle valve 4, cutoff valve 8, and NK valve 7.
The SV is closed and the TPT is operated by wet blast furnace gas.
ケース■：乾式集塵装置ラインと湿式集塵装置ラインと
を切換える場合
バタフライ弁２．３の開閉の組合・Ｕによって両ライン
の切換えができる。Case ■: When switching between the dry dust collector line and the wet dust collector line, both lines can be switched by opening/closing combination U of butterfly valve 2.3.
以上の方法によると、４０００ ｒｒｆクラスの高炉に
おいて従来法に比べてＳＶ前後の伸縮継手、バタフライ
弁、ミストスプレィ設備、ＶＳ−ＴＲＴ間配管内の耐酸
コーティング等が省略でき、設備費が約３５００万円節
約でき、またＢＤＣ運転時に高炉炉頂ガスが異常高温に
なる時はＴＲＴをトリラフ−させ遮断弁を閉じれば、迅
速に湿式運転に切換えることができ、ＢＤＣの濾布焼損
を確実に防止することができる。According to the above method, compared to the conventional method in a 4000 rrf class blast furnace, expansion joints before and after the SV, butterfly valves, mist spray equipment, acid-resistant coating inside the VS-TRT piping, etc. can be omitted, and the equipment cost is approximately 35 million yen. In addition, when the top gas of the blast furnace reaches an abnormally high temperature during BDC operation, by tri-luffing the TRT and closing the shutoff valve, it is possible to quickly switch to wet operation, which reliably prevents burnout of the BDC filter cloth. be able to.
本発明方法はＢＤＣとして高圧バックフィルターでなく
、高圧用乾式電気集塵機を用いた場合にも全く同様に適
用できる。The method of the present invention can be applied in exactly the same way even when a high-pressure dry electrostatic precipitator is used instead of a high-pressure back filter as the BDC.
バタフライ弁２、ゴグル弁４を閉し、ＳＶのリークガス
、炉頂装入装置への均圧ガスとしてＤＣ１■Ｓを通過し
た高炉ガスを供給した場合に、従来はＤＣ〜■Ｓ間配管
で間座管率は０％であり、ダストが堆積し、４０００ｒ
４クラスの高炉で、約４０日間で配管断面積の１５％ま
でダストが堆積してしまったが、請求項３に係る方法を
適用することによってＤＣ−ＶＳ間配管で除塵効率は１
００％となり、配管内へのダストの堆積は皆無となった
。When the butterfly valve 2 and goggle valve 4 are closed and the blast furnace gas that has passed through DC1■S is supplied as SV leak gas and pressure equalization gas to the furnace top charging device, conventionally, there is a gap in the piping between DC and ■S. The seat pipe ratio is 0%, dust is deposited, and 4000r
In a Class 4 blast furnace, dust accumulated up to 15% of the piping cross-sectional area in about 40 days, but by applying the method according to claim 3, the dust removal efficiency in the DC-VS piping was reduced to 1.
00%, and there was no dust accumulation inside the piping.
〈発明の効果〉
本発明方法によると、前述のとおり設備費が安価になり
、高炉炉頂ガスの異常高温、ＴＲＴ トリップなどの異
常事態に容易に、かつ迅速に対応できると共に、前記発
明に係る方法においてＤＣからＶＳまでの配管内にダス
トが堆積することを防止できる。<Effects of the Invention> As described above, the method of the present invention reduces equipment costs, makes it possible to easily and quickly respond to abnormal situations such as abnormally high temperature of blast furnace top gas, TRT trip, etc. In this method, it is possible to prevent dust from accumulating in the piping from DC to VS.
第１図は、本発明方法を説明するだめの高炉炉１
類ガス集塵装置のフローシート、第２図は、本発明方法
の詳細説明図、第３図は、従来方法を説明するための高
炉炉頂ガス集塵装置のフローシートである。
２
１．２．３・・・バタフライ弁、
４．５．６・・・ゴグル弁、
７・・・ＮＫ弁、 ８．９・・・遮断弁、１
０・・・散水個所、 １１・・・逆洗ファン、
１２・・・ＤＣ〜ＶＳ間配管、 １３・・・逆洗用弁、
１４・・・パージ用弁、 １５・・・パージ用ノ
ズル、１６・・・オン・オフ弁、 ３０・・・高炉
（ＢＦ）、３１・・・ダストキャツチャ−（ＤＣ）、３
２・・・ベンチュリースフラッパ−（ＶＳ）、３３・・
・セプタム弁（ＳＶ）、
３４・・・乾式集塵装置（ＢＤＣ）、
３５・・・炉頂圧タービン（ＴＰＴ）。Fig. 1 is a flow sheet of a blast furnace class 1 gas dust collector for explaining the method of the present invention, Fig. 2 is a detailed explanatory diagram of the method of the present invention, and Fig. 3 is a flow sheet for explaining the conventional method. This is a flow sheet of a blast furnace top gas dust collector. 2 1.2.3... Butterfly valve, 4.5.6... Goggle valve, 7... NK valve, 8.9... Shutoff valve, 1
0... Water sprinkling point, 11... Backwash fan,
12... Piping between DC and VS, 13... Backwash valve,
14...Purge valve, 15...Purge nozzle, 16...On/off valve, 30...Blast furnace (BF), 31...Dust catcher (DC), 3
2...Venturi flapper (VS), 33...
- Septum valve (SV), 34... Dry dust collector (BDC), 35... Furnace top pressure turbine (TPT).
Claims (1)
下流側に湿式集塵装置と乾式集塵装置とを併用し、炉頂
圧タービンによって高炉炉頂ガスの保有する圧力および
熱エネルギーを回収するに際し、 乾式集塵装置運転時には、乾式集塵装置通 過ガスだけが炉頂圧タービンに供給され、セプタム弁の
リークガスおよび炉頂装入設備の均圧用ガスとしては湿
式集塵装置通過ガスが供給されるようにしたことを特徴
とする高炉炉頂ガスエネルギー回収方法。 ２、乾式集塵装置運転時に高炉炉頂ガスが異常に高温に
なる時には、炉頂圧タービン上流側の炉頂ガス温度セン
サの信号によって、炉頂圧タービン前に設置された遮断
弁を閉にし高炉炉頂ガス全量を湿式集塵装置側に切換え
ることを特徴とする請求項１記載の高炉炉頂ガスエネル
ギー回収方法。 ３、請求項１記載の高炉炉頂ガスエネルギー回収方法に
用いる設備において、 乾式集塵装置のバグフィルタの逆洗ファン から吐出する高炉ガスを、ダストキャッチャーからベン
チュリースクラッパーまでの配管内に上流側から順次下
流側に吹きつけて、配管内におけるダストの堆積を防止
することを特徴とする高炉炉頂ガス回収設備の配管内除
塵方法。[Claims] 1. As a blast furnace top gas dust collector, a wet type dust collector and a dry type dust collector are used together on the downstream side of the dust catcher, and the pressure held by the blast furnace top gas is controlled by the furnace top pressure turbine. When recovering thermal energy, when the dry dust collector is in operation, only the gas passing through the dry dust collector is supplied to the furnace top pressure turbine, and the wet dust collector is used as the septum valve leak gas and the pressure equalization gas of the furnace top charging equipment. A method for recovering blast furnace top gas energy, characterized in that passing gas is supplied. 2. When the blast furnace top gas becomes abnormally high temperature during operation of the dry dust collector, the shutoff valve installed in front of the furnace top pressure turbine is closed based on the signal from the furnace top gas temperature sensor on the upstream side of the furnace top pressure turbine. The blast furnace top gas energy recovery method according to claim 1, characterized in that the entire amount of blast furnace top gas is switched to the wet dust collector side. 3. In the equipment used in the blast furnace top gas energy recovery method according to claim 1, the blast furnace gas discharged from the backwash fan of the bag filter of the dry dust collector is transferred to the upstream side in the piping from the dust catcher to the venturi scraper. A method for removing dust from inside a pipe of a blast furnace top gas recovery equipment, characterized in that the dust is sprayed sequentially from the beginning to the downstream side to prevent dust from accumulating inside the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2093867A JP2790704B2 (en) | 1990-04-11 | 1990-04-11 | Blast furnace top gas energy recovery method and dust removal method in piping of the recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2093867A JP2790704B2 (en) | 1990-04-11 | 1990-04-11 | Blast furnace top gas energy recovery method and dust removal method in piping of the recovery equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03294714A true JPH03294714A (en) | 1991-12-25 |
| JP2790704B2 JP2790704B2 (en) | 1998-08-27 |
Family
ID=14094402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2093867A Expired - Fee Related JP2790704B2 (en) | 1990-04-11 | 1990-04-11 | Blast furnace top gas energy recovery method and dust removal method in piping of the recovery equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2790704B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165693A (en) * | 2018-03-09 | 2018-06-15 | 中冶京诚工程技术有限公司 | Coupling method and system for charging bucket pressure-equalizing gas recovery and blast furnace gas dry dust removal |
| CN115948628A (en) * | 2022-12-09 | 2023-04-11 | 中冶南方工程技术有限公司 | Blast furnace gas dry dedusting device with secondary pressure balance system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6119709A (en) * | 1984-07-06 | 1986-01-28 | Sumitomo Metal Ind Ltd | Controlling method of temperature on occurrence of blow-by in blast furnace |
| JPS6445925A (en) * | 1987-08-17 | 1989-02-20 | Kawasaki Steel Co | Energy recovering method for blast furnace gas |
-
1990
- 1990-04-11 JP JP2093867A patent/JP2790704B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6119709A (en) * | 1984-07-06 | 1986-01-28 | Sumitomo Metal Ind Ltd | Controlling method of temperature on occurrence of blow-by in blast furnace |
| JPS6445925A (en) * | 1987-08-17 | 1989-02-20 | Kawasaki Steel Co | Energy recovering method for blast furnace gas |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165693A (en) * | 2018-03-09 | 2018-06-15 | 中冶京诚工程技术有限公司 | Coupling method and system for charging bucket pressure-equalizing gas recovery and blast furnace gas dry dust removal |
| CN108165693B (en) * | 2018-03-09 | 2023-04-25 | 中冶京诚工程技术有限公司 | Coupling method and system for equalizing gas recovery of charging bucket and dry dust removal of blast furnace gas |
| CN115948628A (en) * | 2022-12-09 | 2023-04-11 | 中冶南方工程技术有限公司 | Blast furnace gas dry dedusting device with secondary pressure balance system and method |
| CN115948628B (en) * | 2022-12-09 | 2023-08-25 | 中冶南方工程技术有限公司 | Blast furnace gas dry dust removal device and method with secondary pressure balance system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2790704B2 (en) | 1998-08-27 |
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