JPH01193514A - Igniting/extinguishing method for slurry burner for slurry combustion device - Google Patents
Igniting/extinguishing method for slurry burner for slurry combustion deviceInfo
- Publication number
- JPH01193514A JPH01193514A JP63016477A JP1647788A JPH01193514A JP H01193514 A JPH01193514 A JP H01193514A JP 63016477 A JP63016477 A JP 63016477A JP 1647788 A JP1647788 A JP 1647788A JP H01193514 A JPH01193514 A JP H01193514A
- Authority
- JP
- Japan
- Prior art keywords
- cwm
- burner
- water
- steam
- slurry
- 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
- 239000002002 slurry Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000010926 purge Methods 0.000 claims abstract description 91
- 239000003245 coal Substances 0.000 abstract description 18
- 238000001816 cooling Methods 0.000 abstract description 10
- 239000000446 fuel Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 15
- 239000007921 spray Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- -1 steam Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/007—Regulating fuel supply using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/02—Starting or ignition cycles
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、スラリ燃焼装置におけるスラリバーナの点火
消火方法に係り、特にスラリの配管内での固化、閉塞を
防止するのに好適なスラリ燃焼装置におけるスラリバー
ナの点火消火方法に関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for igniting and extinguishing a slurry burner in a slurry combustion device, and particularly to a slurry combustion device suitable for preventing solidification and clogging of slurry in piping. The present invention relates to a method for igniting and extinguishing a slurry burner.
石炭・水スラリ（以下、ＣＷＭという）を燃焼する方式
として噴霧微粒化による直接燃焼方式があり、この方式
によれば固体の石炭を流体状に扱うことができるために
、流量の制御やバーナの構造を単純化できる等生焚きに
ないメリットが出てくる。ＣＷＭは水と石炭粒子との混
合物であるから、水分がなくなると石炭粒子が凝集固化
し、水分の割合が多くなると石炭粒子は沈澱して凝集圧
密する。There is a direct combustion method using spray atomization as a method for burning coal-water slurry (hereinafter referred to as CWM), and since this method allows solid coal to be treated as a fluid, it is difficult to control the flow rate and control the burner. It has advantages that raw-fired fires do not have, such as the ability to simplify the structure. Since CWM is a mixture of water and coal particles, when moisture is removed, the coal particles coagulate and solidify, and when the proportion of moisture increases, the coal particles settle and coagulate and consolidate.
第３図は、従来のＣＷＭ燃焼装置の系統を示す図である
。この装置は、ＣＷＭを噴霧するアトマイザを先端に備
えたＣＷＭバーナ９と、ｉｃＷＭバーナ９へＣＷＭｌを
供給するＣＷＭ供給管２、ＣＷＭ水パージ弁４、ＣＷＭ
止弁５、ＣＷＭバーナ入口管６およびＣＷＭフレキシブ
ルホース７とからなるＣＷＭ供給系統と、前記ＣＷＭバ
ーナ９へ噴霧媒体である蒸気１１を供給する、蒸気供給
管１２、蒸気止弁１３および蒸気フレキシブルホース１
５とからなる噴霧媒体供給系統と、前記ＣＷＭ供給系統
のＣＷＭ水パージ弁４に連結された、水供給管２２およ
び水止弁２３からなる水供給系統とから主として構成さ
れている。なお前記ＣＷＭ水バージ弁４は三方弁である
。また、８および１６はそれぞれＣＷＭ供給系統および
噴霧媒体供給系統に設けられた圧力計である。FIG. 3 is a diagram showing the system of a conventional CWM combustion device. This device consists of a CWM burner 9 equipped with an atomizer at the tip that sprays CWM, a CWM supply pipe 2 that supplies CWML to the icWM burner 9, a CWM water purge valve 4, and a CWM water purge valve 4.
A CWM supply system consisting of a stop valve 5, a CWM burner inlet pipe 6, and a CWM flexible hose 7; a steam supply pipe 12, a steam stop valve 13, and a steam flexible hose that supply steam 11, which is a spray medium, to the CWM burner 9; 1
5, and a water supply system consisting of a water supply pipe 22 and a water stop valve 23, which are connected to the CWM water purge valve 4 of the CWM supply system. Note that the CWM water barge valve 4 is a three-way valve. Moreover, 8 and 16 are pressure gauges provided in the CWM supply system and the spray medium supply system, respectively.
このような構成において、ＣＷＭバーナ９を点火する際
には、まず蒸気止弁１３を開き蒸気１１によりＣＷＭバ
ーナ９を冷却すると同時に、ＣＷＭ水パージ弁４を水供
給系統とＣＷＭ供給系統を連通ずる位置にし、ＣＷＭ止
弁５および水止弁２３を開いてＣＷＭバーナ入口管６お
よびＣＷＭフレキシブルホース７を水２１で湿らせる。In such a configuration, when igniting the CWM burner 9, the steam stop valve 13 is first opened to cool the CWM burner 9 with the steam 11, and at the same time, the CWM water purge valve 4 is connected to the water supply system and the CWM supply system. position and open the CWM stop valve 5 and water stop valve 23 to moisten the CWM burner inlet pipe 6 and CWM flexible hose 7 with water 21.
次に、ＣＷＭ水パージ弁４をＣＷＭ供給管２とＣＷＭバ
ーナ入口管６とを連通ずる位置に切替え、ＣＷＭｌをＣ
ＷＭバーナ９内に投入して点火する。Next, switch the CWM water purge valve 4 to a position that communicates the CWM supply pipe 2 and CWM burner inlet pipe 6, and
Put it into the WM burner 9 and ignite it.
一方、ＣＷＭバーナ９を消火する際には、ＣＷＭ水パー
ジ弁４をＣＷＭ供給系統と水供給系統を連通ずる位置に
切替えることにより、ＣＷＭの供給を停止し、ＣＷＭ水
パージ弁４以降のＣＷＭ供給系統内のＣＷＭＩを水２１
にてパージし、ＣＷＭバーナ９内にＣＷＭｌを残さない
ようにする。On the other hand, when extinguishing the CWM burner 9, the CWM water purge valve 4 is switched to a position where the CWM supply system and the water supply system are communicated to stop the CWM supply, and the CWM water supply from the CWM water purge valve 4 onward is stopped. Water 21 CWMI in the system
purge so that no CWMl remains in the CWM burner 9.
その後水止弁２３、蒸気止弁１３を閉じて各系統の運転
を停止する。この種の従来技術に関連するものとして、
例えば特開昭５８−６８９５２号公報および５８−５０
７５４号公報があげられる。After that, the water stop valve 23 and the steam stop valve 13 are closed to stop the operation of each system. Related to this type of prior art,
For example, JP-A-58-68952 and JP-A-58-50
Publication No. 754 is mentioned.
しかしながら上記従来技術では、ＣＷＭ供給系統のパー
ジが不完全であるという問題がある。すなわち、消火時
に水２１でＣＷＭ供給系統をパージしたとき、ＣＷＭ水
バージ弁４以降のＣＷＭ供給系゛統内のＣＷＭＩは徐々
に水で置換されるものの一１完全なプラグフローでない
限り石炭粒子が残留するので、水２１によるパージを停
止した後、石炭粒子が沈降して管内壁に付着する。この
ため、ＣＷＭバーナ９の点火消火を繰返すと徐々にＣＷ
Ｍバーナ入ロ管６内に石炭粒子が層状に貯まり、ついに
はＣＷＭバーナ入口管６を閉塞させたり、剥離した石炭
粒子によるアトマイザ噴出孔部の詰まりを生ずるおそれ
があった。ところで、ＣＷＭｌのパージを極力完全に行
なうためには水２１によるパージ時間を長くすることが
好ましいが、高温雰囲気である燃焼装置の火炉内に大量
のパージ水を投入すると、炉内ガス温度が低下し、別の
ＣＷＭバーナでの安定燃焼が妨げられるとともに、不要
な熱損失を生じるという問題が発生する。またこのパー
ジ水により炉材が急冷され破壊されるという問題もある
。一方点火時に、ＣＷＭバーナ９が水で直接パージされ
るので、炉内の輻射熱で加熱されたＣＷＭバーナ９の先
端が急冷され、セラミックス材等が破壊されるという問
題がある。However, the above conventional technology has a problem in that the purging of the CWM supply system is incomplete. That is, when the CWM supply system is purged with water 21 during extinguishing, the CWMI in the CWM supply system after the CWM water barge valve 4 is gradually replaced by water, but unless there is a complete plug flow, the coal particles are Since the coal particles remain, after the purge with water 21 is stopped, the coal particles settle and adhere to the inner wall of the pipe. Therefore, when the CWM burner 9 is repeatedly turned on and off, the CW
Coal particles accumulate in layers in the M burner inlet pipe 6, and there is a risk that the CWM burner inlet pipe 6 will eventually be clogged or the atomizer outlet will be clogged by the separated coal particles. By the way, in order to purge CWML as completely as possible, it is preferable to lengthen the purge time with water 21, but if a large amount of purge water is put into the furnace of a combustion device, which has a high temperature atmosphere, the gas temperature in the furnace will drop. However, a problem arises in that stable combustion in another CWM burner is hindered and unnecessary heat loss occurs. There is also the problem that the purge water rapidly cools down the furnace material and destroys it. On the other hand, since the CWM burner 9 is directly purged with water during ignition, there is a problem that the tip of the CWM burner 9 heated by radiant heat in the furnace is rapidly cooled and the ceramic material etc. are destroyed.
本発明の目的は、上記従来技術の問題点を解決し、ＣＷ
Ｍバーナの点火時および消火時におけるＣＷＭ供給系統
を、急冷することなく、また大量のパージ水を用いるこ
となくほぼ完全にパージすることができるスラリ燃焼装
置におけるスラリバーナの点火消火方法を提供すること
にある。The purpose of the present invention is to solve the problems of the prior art described above, and to
To provide a method for igniting and extinguishing a slurry burner in a slurry combustion device, which can almost completely purge a CWM supply system when igniting and extinguishing an M burner without rapidly cooling it or using a large amount of purge water. be.
上記目的を達成するため本発明は、スラリバーナの点火
時には、スラリ供給系統を水でパージした後にスラリを
供給し、消火時にはスラリの供給を停止した後、スラリ
供給系統を水でパージするスラリ燃焼装置おけるスラリ
バーナの点火消火方法において、点火時には、前記スラ
リ供給系統を空気または／および蒸気でパージし、さら
に水でパージした後スラリを供給し、消火時には、スラ
リの供給を停止した後、スラリ供給系統を水でパージし
、さらに空気または／および蒸気でパージすることを特
徴とするものである。In order to achieve the above object, the present invention provides a slurry combustion device that supplies slurry after purging the slurry supply system with water when igniting a slurry burner, and purges the slurry supply system with water after stopping the supply of slurry when extinguishing the slurry burner. In a method for igniting and extinguishing a slurry burner, at the time of ignition, the slurry supply system is purged with air or/and steam and further purged with water, and then slurry is supplied, and at the time of extinguishment, the slurry supply system is supplied after stopping the supply of slurry. This method is characterized by purging with water and further purging with air and/or steam.
スラリバーナの点火時に、スラリ供給系統を空気または
／および蒸気でパージし、さらに水によるパージを行な
った後スラリを供給することにより、スラリバーナは空
気または／および蒸気によりある程度冷却された後に水
でパージされることになり、前記スラリバーナの急冷を
回避することができるので、バーナ装置の熱疲労による
破損を防止することができるとともに、供給されたＣＷ
Ｍ中の水分の蒸発が防止できるので石炭粒子が固化する
こともない。また、スラリバーナの消火時には、スラリ
の供給を停止した後、水パージを行ない、さらに空気ま
たは／および蒸気でパージすることにより、パージ水の
使用量を必要最小限にでき、かつ空気または／および蒸
気により石炭粒子を含んだ残留パージ水を完全にパージ
できるので、炉内の別のバーナおよび各部材に対する水
パージによる悪影響を低減できるとともに、残留石炭に
よる配管の詰まりゃ閉塞等の悪影響を防止できる。When the slurry burner is ignited, the slurry supply system is purged with air or/and steam, and then the slurry is supplied after further purging with water, so that the slurry burner is cooled to some extent by air or/and steam and then purged with water. As a result, rapid cooling of the slurry burner can be avoided, and damage to the burner device due to thermal fatigue can be prevented, and the supplied CW
Since evaporation of water in M can be prevented, coal particles will not solidify. In addition, when extinguishing a slurry burner, after stopping the supply of slurry, a water purge is performed, and then an air or/and steam purge is performed to minimize the amount of purge water used, and the air or/and steam Since residual purge water containing coal particles can be completely purged, it is possible to reduce the adverse effects of water purging on other burners and each member in the furnace, and to prevent adverse effects such as clogging of pipes due to residual coal.
本発明において、水、蒸気または空気の投入流量および
時間をＣＷＭバーナに設置した温度計および各パージ流
体ごとに設置した流量計を用いて管理することが好まし
いが、各パージ流体の供給系統に設置した圧力計を目安
にして行うこともできる。In the present invention, it is preferable to manage the input flow rate and time of water, steam, or air using a thermometer installed in the CWM burner and a flow meter installed for each purge fluid. You can also use the pressure gauge as a guide.
次に、本発明を実施例によりさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
第１図は、本発明の一実施例を示す装置系統図である。FIG. 1 is an apparatus system diagram showing an embodiment of the present invention.
この装置は、ＣＷＭＩを噴霧する耐摩耗材としてセラミ
ックスを使用したアトマイザを備えたＣＷＭバーナ９と
、８亥ＣＷＭバーナ９にＣＷＭｌを供給するＣＷＭ供給
系統と、前記ＣＷＭバーナ９に噴霧媒体を供給する噴霧
媒体供給系統と、該噴霧媒体供給系統から分岐されて前
記ＣＷＭ供給系統に連通ずるパージ系統と、該パージ系
統に連結する水供給系統とから主として構成されている
。ＣＷＭ供給系統は、ＣＷＭ供給管２、ＣＷＭ戻り弁３
、ＣＷＭ水パージ弁４、ＣＷＭ止弁５、ＣＷＭバーナ入
口管６およびＣＷＭフレキシブルホース７とからなり、
噴霧媒体供給系統は蒸気供給管１２、蒸気止弁１３、蒸
気バーナ入口弁１４および蒸気フレキシブルホース１５
からなっている。また、パージ系統は、前記噴霧媒体供
給系統の蒸気止弁１３の後流の配管から分岐された、蒸
気パージ人口弁１７および蒸気パージ弁２４を有するパ
ージ管からなり、水供給系統は、前記パージ系統の蒸気
パージ弁２４に連通ずる、水止弁２３を有する水供給管
２２からなっている。なお、１０はＣＷＭ供給系統のＣ
ＷＭ戻り弁３と図示されてないＣＷＭ貯槽とを連通ずる
ＣＷＭ戻り管、８および１６は、それぞれＣＷＭ供給系
統および噴霧媒体供給系統のＣＷＭバーナ９との接続部
分に設けられた圧力計である。This device includes a CWM burner 9 equipped with an atomizer using ceramics as a wear-resistant material that sprays CWMI, a CWM supply system that supplies CWMI to the eight CWM burners 9, and a sprayer that supplies an atomizing medium to the CWM burner 9. It mainly consists of a medium supply system, a purge system branched from the spray medium supply system and connected to the CWM supply system, and a water supply system connected to the purge system. The CWM supply system includes a CWM supply pipe 2 and a CWM return valve 3.
, a CWM water purge valve 4, a CWM stop valve 5, a CWM burner inlet pipe 6 and a CWM flexible hose 7,
The spray medium supply system includes a steam supply pipe 12, a steam stop valve 13, a steam burner inlet valve 14, and a steam flexible hose 15.
It consists of Further, the purge system is composed of a purge pipe having a steam purge population valve 17 and a steam purge valve 24, which is branched from a pipe downstream of the steam stop valve 13 of the spray medium supply system, and the water supply system is connected to the purge medium supply system. It consists of a water supply pipe 22 with a water stop valve 23 communicating with a steam purge valve 24 of the system. Note that 10 is C of the CWM supply system.
The CWM return pipes 8 and 16, which communicate the WM return valve 3 with a CWM storage tank (not shown), are pressure gauges provided at the connection with the CWM burner 9 of the CWM supply system and the atomizing medium supply system, respectively.
このような構成において、ＣＷＭバーナ９を点火する場
合は、まずＣＷＭ戻り弁３をＣＷＭ供給管２とＣＷＭ戻
り管１０を連通する位置とした後、図示していないＣＷ
Ｍ供給ポンプを起動させてＣＷＭＩをＣＷＭ供給管２、
ＣＷＭ戻り弁３、ＣＷＭ戻り管１０および図示されてい
ないＣＷＭ貯槽間で循環させ、ＣＷＭＩの投入準備段階
に入る。In such a configuration, when igniting the CWM burner 9, first set the CWM return valve 3 to a position where the CWM supply pipe 2 and the CWM return pipe 10 communicate with each other, and then
Start the M supply pump and connect the CWMI to the CWM supply pipe 2,
The mixture is circulated between the CWM return valve 3, the CWM return pipe 10, and a CWM storage tank (not shown), and the CWMI input preparation stage begins.
次にＣＷＭバーナ９を燃料が投入されてもよい状態にセ
ットした後、蒸気止弁１３および蒸気バーナ入口弁１４
を開き、噴霧媒体供給系統からＣＷＭバーナ９へ蒸気を
供給して炉内の別のＣＷＭバーナの輻射熱によって高温
となったＣＷＭバーナ９の先端を冷却する。次に、ＣＷ
Ｍ水バージ弁４をパージ系統とＣＷＭ供給系統とを連通
ずる位置に、蒸気パージ弁２４をＣＷＭ供給系統と噴霧
媒体供給系統を連通ずる位置にそれぞれ切替え、蒸気パ
ージ人口弁１７を開きＣＷＭ供給系統にも蒸気を供給し
て、ＣＷＭバー゛す９の先端のＣＷＭ流路をまず蒸気に
よってパージし冷却する。その後、蒸気パージ弁２４を
ＣＷＭ供給系統と水供給系統とが連通ずる位置に切替え
ると同時に、水止弁２３を開きＣＷＭ供給系統およびＣ
ＷＭバーナ９内を蒸気から水に置換し、アトマイザ先端
も同時に水により冷却する。最後に、ＣＷＭ戻り弁３お
よびＣＷＭ水バージ弁４をすべてのＣＷＭ供給系統が連
通ずる位置に切替えることにより、ＣＷＭバーナ入口管
６、ＣＷＭフレキシブルホース７およびＣＷＭバーナ９
内が水からＣＷＭに置換され、ＣＷＭＩの噴霧燃焼が開
始される。Next, after setting the CWM burner 9 to a state where fuel can be supplied, the steam stop valve 13 and the steam burner inlet valve 14 are opened.
is opened, and steam is supplied from the atomizing medium supply system to the CWM burner 9 to cool the tip of the CWM burner 9, which has become hot due to the radiant heat of another CWM burner in the furnace. Next, C.W.
Switch the M water barge valve 4 to a position that communicates the purge system and the CWM supply system, and switch the steam purge valve 24 to a position that communicates the CWM supply system and the spray medium supply system, and open the steam purge population valve 17 to open the CWM supply system. The CWM channel at the tip of the CWM bar 9 is first purged with steam and cooled. After that, the steam purge valve 24 is switched to a position where the CWM supply system and the water supply system communicate with each other, and at the same time, the water stop valve 23 is opened and the CWM supply system and the water supply system are connected to each other.
Steam is replaced with water in the WM burner 9, and the atomizer tip is also cooled with water at the same time. Finally, by switching the CWM return valve 3 and the CWM water barge valve 4 to a position where all the CWM supply lines are in communication, the CWM burner inlet pipe 6, the CWM flexible hose 7 and the CWM burner 9
The water inside the tank is replaced with CWM, and the spray combustion of CWMI is started.
一方、ＣＷＭバーナ９を消火するときは、まずＣＷＭ戻
り弁３を、ＣＷＭ供給管２とＣＷＭ戻り管１０とで循環
流路を形成するように切替えることにより、ＣＷＭＩの
バーナ９への供給を停止させる。次に、水止弁２３を開
き、蒸気パージ弁２４を水供給系統とＣＷＭ供給系統を
連通ずる状態にして、ＣＷＭ水パージ弁４をＣＷＭ供給
系統とパージ系統を連通ずる位置に切替えることにより
、ＣＷＭ供給系統内に残留するＣＷＭｌを水２１にてパ
ージする。次に、蒸気パージ人口弁１７を開き、蒸気パ
ージ弁２４をＣＷＭ供給系統と噴霧媒体供給系統を連通
するように切替えることにより、蒸気バージ弁２４およ
びＣＷＭ水バージ弁４以降のＣＷＭ供給系統内の水を蒸
気で置換し、前記ＣＷＭ供給系統内のパージ水中に残っ
ている石炭粒子を系統内に残すことなくパージする。次
に、ＣＷＭ燃焼装置の完全停止操作として蒸気バーナ入
口弁１４および蒸気パージ人口弁１７を閉じて蒸気の供
給を停止する。On the other hand, when extinguishing the CWM burner 9, first switch the CWM return valve 3 so that the CWM supply pipe 2 and the CWM return pipe 10 form a circulation flow path to stop the supply of CWMI to the burner 9. let Next, the water stop valve 23 is opened, the steam purge valve 24 is placed in a state where the water supply system and the CWM supply system are communicated, and the CWM water purge valve 4 is switched to a position where the CWM supply system and the purge system are communicated with each other. CWMl remaining in the CWM supply system is purged with water 21. Next, by opening the steam purge population valve 17 and switching the steam purge valve 24 to communicate the CWM supply system and the spray medium supply system, the steam purge valve 24 and the CWM supply system after the CWM water barge valve 4 are Water is replaced with steam to purge remaining coal particles in the purge water in the CWM supply system without leaving them in the system. Next, as a complete shutdown operation of the CWM combustion apparatus, the steam burner inlet valve 14 and the steam purge artificial valve 17 are closed to stop the supply of steam.
本実施例によれば、ＣＷＭバーナ９の点火時にはＣＷＭ
供給系統内が蒸気から水、水からＣＷＭへと段階的に切
替えられることにより、ＣＷＭバーナ９の先端の温度は
徐りに冷却されるので、セラミックス部材等の熱衝撃に
よる破損を防止できるとともに、ＣＷＭバーナ９に投入
されたＣＷＭｌ中の水が急激に蒸発することによる石炭
粒子の凝集固化が回避される。また、水パージを行なう
前に蒸気パージを行なうので、水だけで冷却する場合よ
りもパージ水量を少なくすることができ、炉内の別のＣ
ＷＭバーナの安定燃焼を妨げたり、バーナ周囲部材を象
、冷するという悪影響を最小限にすることができる。According to this embodiment, when the CWM burner 9 is ignited, the CWM
By switching the supply system from steam to water and from water to CWM in stages, the temperature at the tip of the CWM burner 9 is gradually cooled, so damage to ceramic members etc. due to thermal shock can be prevented, and Coagulation and solidification of coal particles due to rapid evaporation of water in the CWM1 introduced into the CWM burner 9 is avoided. Additionally, since a steam purge is performed before a water purge, the amount of purge water can be reduced compared to when cooling with water alone.
It is possible to minimize the adverse effects of interfering with stable combustion of the WM burner and cooling the surrounding members of the burner.
一方、ＣＷＭバーナ消火時にはＣＷＭ供給系統を水でパ
ージした後、直ちに蒸気パージに切替えることができ、
パージ流体の管内流速を従来技術に較べて大きくとれる
ので、系統内のＣＷＭを完全にパージすることができる
。また、パージ水量を必要最小限にしてパージ蒸気量を
多くすることにまり、火炉内の別のＣＷＭバーナの失火
および急冷を回避することができる。On the other hand, when the CWM burner is extinguished, the CWM supply system can be purged with water and then immediately switched to steam purge.
Since the flow rate of the purge fluid in the pipe can be increased compared to the prior art, CWM in the system can be completely purged. Further, by increasing the amount of purge steam while minimizing the amount of purge water, it is possible to avoid misfire and rapid cooling of another CWM burner in the furnace.
本実施例において、燃焼を停止したＣＷＭバーナ９が別
の運転中のＣＷＭバーナの火炎の輻射熱を受けるような
場合には、パージ系統の蒸気パージ人口弁１７からＣＷ
Ｍ供給系統に供給されるパージ用蒸気をそのまま継続し
て供給し、ＣＷＭバーナ９を引き続き冷却することが好
ましい。これにより、ＣＷＭハ′−す９が冷却されるだ
けでなく、系統内の残存石炭粒子がより完全にパージさ
れ、るうえ、ＣＷＭバーナの再点火時の準備操作ともな
る。また本実施例において、ＣＷＭＩの供給を停止した
ときには、ＣＷＭ水パージ弁４をＣＷＭ供給系統とパー
ジ系統とを連通ずる位置に切替え、ＣＷＭ戻り弁３はＣ
ＷＭ供給管２とＣＷＭ戻り管１０とを連通ずる位置にし
て循環流を形成しておくことが好ましい。これによりＣ
ＷＭ水パージ弁４が蒸気によって加熱されても、ＣＷＭ
戻り弁３内のＣＷＭが加熱により固化することがなくな
る。In this embodiment, when the CWM burner 9 that has stopped combustion receives radiant heat from the flame of another CWM burner in operation, the steam purge valve 17 of the purge system
It is preferable that the purge steam supplied to the M supply system is continuously supplied as it is, and the CWM burner 9 is continuously cooled. This not only cools the CWM hearth 9, but also purges the system of residual coal particles more completely, as well as preparatory operations for reigniting the CWM burners. Further, in this embodiment, when the supply of CWMI is stopped, the CWM water purge valve 4 is switched to a position that communicates the CWM supply system and the purge system, and the CWM return valve 3 is
It is preferable that the WM supply pipe 2 and the CWM return pipe 10 be placed in communication with each other to form a circulating flow. This allows C
Even if the WM water purge valve 4 is heated by steam, the CWM
The CWM in the return valve 3 will not solidify due to heating.
第２図は、本発明の他の実施例を示す装置系統図である
。この装置は、第１図の装置に空気供給系統および該空
気供給系統を分岐した空気パージ系統を追加したもので
ある。空気供給系統はバーナシール用のものであり、空
気３１の供給管３２、空気シール弁３３、空気シールガ
ン入口管３４および空気シールフレキシブルホース３５
からなり、ＣＷＭバーナ９の空気シール通路３８に連通
ずる空気シールボックス３６に連結されている。空気パ
ージ系統は前記空気供給管３２から分岐されてＣＷＭ供
給系統のＣＷＭ止弁５ａに連通する、空気パージ弁４０
を有するパージ配管と前記空気供給管３２から分岐され
て噴霧媒体供給系統の蒸気止弁１３の後流の配管と連通
する空気クーリング弁３９を有するパージ配管とからな
っている。FIG. 2 is an apparatus system diagram showing another embodiment of the present invention. This device is the same as the device shown in FIG. 1, with the addition of an air supply system and an air purge system branched from the air supply system. The air supply system is for the burner seal, and includes an air 31 supply pipe 32, an air seal valve 33, an air seal gun inlet pipe 34, and an air seal flexible hose 35.
It is connected to an air seal box 36 that communicates with an air seal passage 38 of the CWM burner 9. The air purge system includes an air purge valve 40 that is branched from the air supply pipe 32 and communicates with the CWM stop valve 5a of the CWM supply system.
and a purge pipe having an air cooling valve 39 branched from the air supply pipe 32 and communicating with a pipe downstream of the steam stop valve 13 of the spray medium supply system.
このような構成において、空気３１はバーナシール用と
して、空気供給管３２、空気シール弁３３、空気シール
ガン入口管３４および空気シールフレキシブルホース３
５を経てＣＷＭバーナ９の空気シールボックス３６へ導
入され、火炉内が正圧時には炉内ガスが炉内から外部へ
逆流するのを防止している。またバーナ消火時には、Ｃ
ＷＭバ ・−す９を水パージした後、蒸気パージする代
わりに空気パージ弁４０を開き、ＣＶ／ Ｍ止弁５ａを
ＣＷＭ供給系統と空気パージ系統を連通ずる位置にし、
ＣＷＭ止弁５ａ以降のＣＷ Ｍ供給系統内の残留水を空
気３１にてパージする。またこのとき、噴霧媒体供給系
統側も蒸気止弁１３を閉じ、空気クーリング弁３９を開
くことにより空気３１によりパージすることができる。In such a configuration, air 31 is used for burner sealing through an air supply pipe 32, an air seal valve 33, an air seal gun inlet pipe 34, and an air seal flexible hose 3.
5 to the air seal box 36 of the CWM burner 9, and prevents the furnace gas from flowing back from inside the furnace to the outside when the pressure inside the furnace is positive. Also, when extinguishing the burner, C
After purging the WM bath 9 with water, instead of purging with steam, open the air purge valve 40, set the CV/M stop valve 5a to a position that communicates the CWM supply system and the air purge system,
The residual water in the CWM supply system after the CWM stop valve 5a is purged with air 31. At this time, the spray medium supply system can also be purged with air 31 by closing the steam stop valve 13 and opening the air cooling valve 39.
本実施例によれば、ＣＷＭバーナ９の点火消火時のパー
ジ流体として、蒸気または／および空気から水、水から
蒸気または／および空気と段階的に行なうことにより、
ＣＷＭＩを完全にパージできるとともに、ＣＷＭバーナ
９の熱による衝撃を和らげ、構成部材の破損を防止し、
プラントの寿命および信頼性を向上させることができる
。また、パージ所要水量を最小限にし、水の潜熱損失を
減少させることができるので、炉内雰囲気温度の低下を
防止でき、別のＣＷＭバーナの燃焼に対する妨害を回避
することができる。According to this embodiment, the purge fluid used when igniting and extinguishing the CWM burner 9 is changed from steam or/and air to water, and from water to steam or/and air in stages.
In addition to being able to completely purge CWMI, it also softens the impact caused by the heat of the CWM burner 9 and prevents damage to component parts.
Plant life and reliability can be improved. Furthermore, since the amount of water required for purging can be minimized and the latent heat loss of water can be reduced, it is possible to prevent the atmospheric temperature in the furnace from decreasing and to avoid interference with the combustion of another CWM burner.
本実施例において、バーナ点火時に空気によるパージを
行えば、ＣＷＭバーナ９のガン先端の冷却効果が蒸気に
較べて大きくなるとともに、蒸気源が充分でない場合で
もパージ作業を行なうことができる。また空気によって
ＣＷＭ供給系統をパージすることにより、蒸気によるＣ
ＷＭの過熱、水分の蒸発、石炭粒子の固化の心配がなく
なる。In this embodiment, if air purge is performed when the burner is ignited, the cooling effect of the gun tip of the CWM burner 9 will be greater than that of steam, and the purge operation can be performed even when the steam source is insufficient. Additionally, by purging the CWM supply system with air,
There is no need to worry about overheating of the WM, evaporation of moisture, or solidification of coal particles.
さらに、噴霧媒体として蒸気を使わずに空気を使用する
場合には、前記ＣＷＭ中の水分の蒸発による石炭粒子の
凝集固化の心配がないので、水投入を省略して空気のみ
によるパージ後、ＣＷＭを投入して点火することができ
る。すなわち、噴霧媒体として空気を用い、スラリ供給
系統を直接空気だけでパージしてＣＷＭバーナの点火消
火を行うこともできる。本実施例において、空気供給系
統はシールボックス３６用と別系統としてもよい。Furthermore, when air is used as the atomizing medium instead of steam, there is no fear of coal particles coagulating and solidifying due to evaporation of water in the CWM. You can put it in and ignite it. That is, the CWM burner can be ignited and extinguished by using air as the atomizing medium and directly purging the slurry supply system with only air. In this embodiment, the air supply system may be a separate system from that for the seal box 36.
本発明によれば、スラリ燃焼装置におけるスラリバーナ
の点火および消火時に、バーナおよび火炉に熱的衝撃を
与えることなく、スラリ供給系統内を効率よくパージす
ることができる。According to the present invention, when igniting and extinguishing a slurry burner in a slurry combustion device, the inside of the slurry supply system can be efficiently purged without applying thermal shock to the burner and the furnace.
第１図は、本発明の一実施例を示す装置系統図、第２図
は、本発明の他の実施例を示す装置系統図、第３図は、
従来のスラリ燃焼装置の系統を示す図である。
１０・・・ＣＷＭ戻り管、１４・・・蒸気バーナ入口弁
、１７・・・蒸気パージ人口弁、２４・・・蒸気パージ
弁、３２・・・空気供給管、３３・・・空気シール弁、
３６・・・空気シールボックス、３９・・・空気クーリ
ング弁、４０・・・空気パージ弁。
代理人 弁理士 川 北 武 長
１：ＣＷＭ
２：ＣＷＭ供給管
１１：蒸気
１２：蒸気供給管
１３：蒸気止弁
２１：水
２２：水供給管 −
２３：水上弁
１〜↑ ト２１ １ｅ１FIG. 1 is a system diagram of a device showing one embodiment of the present invention, FIG. 2 is a system diagram of a device showing another embodiment of the present invention, and FIG.
It is a diagram showing a system of a conventional slurry combustion device. 10... CWM return pipe, 14... Steam burner inlet valve, 17... Steam purge population valve, 24... Steam purge valve, 32... Air supply pipe, 33... Air seal valve,
36...Air seal box, 39...Air cooling valve, 40...Air purge valve. Agent Patent Attorney Takeshi Kawakita Cho 1: CWM 2: CWM supply pipe 11: Steam 12: Steam supply pipe 13: Steam stop valve 21: Water 22: Water supply pipe - 23: Water valve 1~↑ G21 1e1
Claims (2)
パージした後スラリを供給し、消火時にはスラリの供給
を停止した後、スラリ供給系統を水でパージするスラリ
燃焼装置おけるスラリバーナの点火消火方法において、
点火時には、前記スラリ供給系統を空気または／および
蒸気でパージし、さらに水でパージした後スラリを供給
し、消火時には、スラリの供給を停止した後、スラリ供
給系統を水でパージし、さらに空気または／および蒸気
でパージすることを特徴とするスラリ燃焼装置における
スラリバーナの点火消火方法。(1) In a method for igniting and extinguishing a slurry burner in a slurry combustion device, the slurry supply system is purged with water when the slurry burner is ignited, and then slurry is supplied, and when the slurry burner is extinguished, the slurry supply system is stopped and the slurry supply system is purged with water.
When igniting, the slurry supply system is purged with air or/and steam, and then purged with water, and then slurry is supplied; when extinguishing, the slurry supply is stopped, the slurry supply system is purged with water, and then air and/or a method for igniting and extinguishing a slurry burner in a slurry combustion device, characterized by purging with steam.
用の空気としてバーナシール用の空気をそれぞれ分岐し
て使用することを特徴とする請求項（１）記載のスラリ
燃焼装置におけるスラリバーナの点火消火方法。(2) Ignition of the slurry burner in the slurry burner according to claim (1), characterized in that the vapor of the atomizing medium is used as the purge vapor, and the air for the burner seal is used as the purge air after branching. Fire extinguishing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63016477A JP2594304B2 (en) | 1988-01-27 | 1988-01-27 | Method for igniting and extinguishing a slurry burner in a slurry combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63016477A JP2594304B2 (en) | 1988-01-27 | 1988-01-27 | Method for igniting and extinguishing a slurry burner in a slurry combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01193514A true JPH01193514A (en) | 1989-08-03 |
| JP2594304B2 JP2594304B2 (en) | 1997-03-26 |
Family
ID=11917359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63016477A Expired - Fee Related JP2594304B2 (en) | 1988-01-27 | 1988-01-27 | Method for igniting and extinguishing a slurry burner in a slurry combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2594304B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05248614A (en) * | 1992-03-09 | 1993-09-24 | Ube Ind Ltd | Method for igniting or extinguishing burner for slurry fuel |
| JP2001276443A (en) * | 2000-03-31 | 2001-10-09 | Nissho Iwai Chemimac Tokyo Corp | Running flame facility device and running flame method |
-
1988
- 1988-01-27 JP JP63016477A patent/JP2594304B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05248614A (en) * | 1992-03-09 | 1993-09-24 | Ube Ind Ltd | Method for igniting or extinguishing burner for slurry fuel |
| JP2001276443A (en) * | 2000-03-31 | 2001-10-09 | Nissho Iwai Chemimac Tokyo Corp | Running flame facility device and running flame method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2594304B2 (en) | 1997-03-26 |
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