JP2503123Y2 - Coal crusher deactivation device - Google Patents
Coal crusher deactivation deviceInfo
- Publication number
- JP2503123Y2 JP2503123Y2 JP1989120911U JP12091189U JP2503123Y2 JP 2503123 Y2 JP2503123 Y2 JP 2503123Y2 JP 1989120911 U JP1989120911 U JP 1989120911U JP 12091189 U JP12091189 U JP 12091189U JP 2503123 Y2 JP2503123 Y2 JP 2503123Y2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- crusher
- coal crusher
- seal air
- inert gas
- 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.)
- Expired - Lifetime
Links
Landscapes
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は石炭粉砕機の不活性化装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an inactivating device for a coal crusher.
近年の微粉炭焚きボイラでは、亜歴青炭等の揮発分の
多い石炭を使用することが多くなっている。このような
石炭は自然発火性が高いため、石炭粉砕機の起動・停止
過程等に火災や爆発を起こす危険がある。このため石炭
粉砕機にイナート（不活性化）システムが採用されてい
た。In recent years, pulverized coal burning boilers often use coal with a high volatile content such as subbituminous coal. Since such coal is highly spontaneously ignitable, there is a risk of causing a fire or an explosion during the process of starting and stopping the coal crusher. For this reason, an inert system was used in the coal crusher.
すなわち、石炭粉砕機内雰囲気の酸素濃度を下げるた
め、イナート媒体として水蒸気またはCO2，N2のような
不活性ガスを連続的もしくは間欠的に導入していた。そ
して石炭粉砕機にイナート媒体を導入すると粉砕機内が
正圧となるので、軸受等の摺動部に微粉が混入するのを
防ぐため、シールエアを導入する必要があった。That is, in order to reduce the oxygen concentration in the atmosphere in the coal pulverizer, steam or an inert gas such as CO 2 or N 2 is continuously or intermittently introduced as an inert medium. Then, when the inert medium is introduced into the coal pulverizer, the inside of the pulverizer becomes a positive pressure, so that it is necessary to introduce the seal air in order to prevent the fine powder from being mixed in the sliding portion such as the bearing.
石炭粉砕機内の残炭を除去したり、内部を点検したり
する際、粉砕機の停止過程でイナート媒体を注入し続け
る必要があるが、イナート媒体が水蒸気の場合には石炭
粉砕機が高温となるので、これが冷えるまでは粉砕機を
開放できないことになる。一方イナート媒体としてN2や
CO2を使用する場合は、その所要量が多いので、非常に
大きなタンクや気化器等が必要であり、建設費、運転費
ともに膨大となっていた。When removing the residual coal in the coal crusher or inspecting the inside, it is necessary to continue to inject the inert medium in the process of stopping the crusher, but if the inert medium is steam, the coal crusher will be at a high temperature. So the crusher can't be opened until it cools down. On the other hand, N 2 and
When CO 2 is used, a large amount of it is required, so a very large tank and carburetor are required, resulting in enormous construction costs and operating costs.
また、軸受等の保護のためシールエアを導入すると、
シールエア中の酸素のため酸素濃度を充分に下げられ
ず、これを充分に下げようとすると、イナート媒体が余
分に必要であった。In addition, if seal air is introduced to protect the bearings,
Due to the oxygen in the seal air, the oxygen concentration could not be lowered sufficiently, and when trying to lower it sufficiently, an extra inert medium was required.
本考案は、前記従来の課題を解決するため、石炭粉砕
機の摺動部分にシールエアを供給する管路と、同管路に
合流して不活性ガスを供給する管路と、上記２管路の上
記合流点の上流にそれぞれ設けられた遮断弁とを備えた
ことを特徴とする石炭粉砕機の不活性化装置を提案する
ものである。In order to solve the conventional problems, the present invention provides a pipeline for supplying seal air to a sliding portion of a coal crusher, a pipeline for merging with the pipeline to supply an inert gas, and the above-mentioned two pipelines. The present invention proposes a deactivation device for a coal crusher, which is provided with a shutoff valve provided upstream of each of the above confluence points.
本考案においては、石炭粉砕機に不活性ガスを導入す
るとき、遮断弁を切換えて、不活性ガスの全てをシール
エアラインから供給するかもしくは不活性ガスの一部を
シールエアラインから供給することにより、石炭粉砕機
イナート時にシールエアを導入しないようにする。In the present invention, when the inert gas is introduced into the coal crusher, the shutoff valve is switched so that all of the inert gas is supplied from the seal air line or a part of the inert gas is supplied from the seal air line. As a result, the seal air is not introduced at the time of inerting the coal crusher.
第１図は本考案の一実施例を示す系統図である。この
図において１は石炭粉砕機,2は給炭機,9は熱空気,4は熱
空気ダクト,6はCO2,7は流量計,8は流量調整弁,9a,9bは
遮断弁,13は圧力計,14は圧力調整弁,15はCO2気化器,16
はCO2タンク,17はシールエアをそれぞれ示す。FIG. 1 is a system diagram showing an embodiment of the present invention. In this figure, 1 is a coal crusher, 2 is a coal feeder, 9 is hot air, 4 is a hot air duct, 6 is CO 2 , 7 is a flow meter, 8 is a flow control valve, 9a and 9b are shutoff valves, 13 Is a pressure gauge, 14 is a pressure control valve, 15 is a CO 2 vaporizer, 16
Indicates a CO 2 tank and 17 indicates seal air.
石炭粉砕機１には給炭機２から石炭が供給され、一方
熱空気３が熱空気ダクト４から石炭粉砕機１の下部に導
入されて、石炭の粉砕と同時に乾燥が行なわれる。その
際粉砕機１の内部は正圧となるので、軸受等の保護のた
めシールエア５が導入される。Coal is supplied from the coal feeder 2 to the coal crusher 1, while hot air 3 is introduced from the hot air duct 4 to the lower part of the coal crusher 1 to simultaneously dry the coal and dry it. At that time, since the inside of the crusher 1 has a positive pressure, the seal air 5 is introduced to protect the bearing and the like.
給炭開始時、給炭停止時および石炭粉砕機緊急停止時
のように爆発・火災が発生しやすい時、本実施例ではシ
ールエア用の遮断弁9aを閉じCO2用の遮断弁9bを開い
て、CO2６を粉砕機１内に導入し、内部の酸素濃度を下
げる。CO2６はCO2タンク16から出てCO2気化器15により
気化され、その後圧力調整弁14で減圧され流量調整弁８
で流量を調整されて、石炭粉砕機１に導入される。When an explosion or fire is likely to occur, such as when coal feeding starts, when coal feeding is stopped, or when an emergency stop of a coal crusher occurs, the shutoff valve 9a for seal air is closed and the shutoff valve 9b for CO 2 is opened in this embodiment. , CO 2 6 are introduced into the crusher 1 to reduce the oxygen concentration inside. CO 2 6 comes out of the CO 2 tank 16, is vaporized by the CO 2 vaporizer 15, and is then decompressed by the pressure regulating valve 14 and the flow regulating valve 8
The flow rate is adjusted by and is introduced into the coal crusher 1.
上記のように本実施例では、シールエアラインからも
不活性ガスであるCO2を導入することにより、石炭粉砕
機に不活性ガスを導入している際粉砕機内が正圧となっ
ても、微粉が軸受等の摺動部に侵入することを防止でき
る。さらに不活性ガス導入時にシールエアが入らないの
で、従来シールエアによりもたらされていた酸素をなく
すことができ、イナート媒体量の低減および、石炭粉砕
機内の酸素濃度低減を達成できる。As described above, in the present embodiment, by introducing CO 2 which is an inert gas from the seal air line, even when the inside of the crusher has a positive pressure when introducing the inert gas into the coal crusher, It is possible to prevent fine powder from entering the sliding parts such as bearings. Further, since the seal air does not enter at the time of introducing the inert gas, it is possible to eliminate the oxygen which has been conventionally brought by the seal air, and it is possible to reduce the amount of inert medium and the oxygen concentration in the coal crusher.
本考案においては、不活性ガスの少なくとも一部をシ
ールエアラインから供給することにより、石炭粉砕機の
イナートの際に必要な不活性ガスの量を節減できる。不
活性ガス量を従来と同じにした場合には、酸素濃度を従
来よりも低減できるから、従来と比べて更に安全にな
る。In the present invention, by supplying at least a part of the inert gas from the seal air line, it is possible to reduce the amount of the inert gas required when the coal pulverizer is inerted. When the amount of the inert gas is the same as the conventional one, the oxygen concentration can be reduced as compared with the conventional one, so that it becomes safer than the conventional one.
第１図は本考案の一実施例を示す系統図である。 １…石炭粉砕機,2…給炭機,3…熱空気,4…熱空気ダク
ト,5…蒸気,6…CO2,7…流量計,8…流量調整弁,9a,9b…
遮断弁,13…圧力計,14…圧力調整弁,15…CO2気化器,16
…CO2タンク,17…シールエア。FIG. 1 is a system diagram showing an embodiment of the present invention. 1 ... coal pulverizer, 2 ... coal feeder, 3 ... hot air, 4 ... hot air ducts, 5 ... steam, 6 ... CO 2, 7 ... flow meter, 8 ... flow control valve, 9a, 9b ...
Shut-off valve, 13 ... Pressure gauge, 14 ... Pressure regulating valve, 15 ... CO 2 vaporizer, 16
… CO 2 tank, 17… Seal air.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 今本 敏彦 長崎県長崎市飽の浦町１番１号 三菱重 工業株式会社長崎造船所内 (72)考案者 金子 祥三 長崎県長崎市飽の浦町１番１号 三菱重 工業株式会社長崎造船所内 (56)参考文献 実開 昭63−28134（ＪＰ，Ｕ) 国際公開88／6920（ＷＯ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiko Imamoto 1-1, Atsunoura-machi, Nagasaki, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Shozo Kaneko 1-1, Atsunoura-machi, Nagasaki, Nagasaki Prefecture Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (56) References: Showa 63-28134 (JP, U) International publication 88/6920 (WO, A)
Claims (1)
する管路と、同管路に合流して不活性ガスを供給する管
路と、上記２管路の上記合流点の上流にそれぞれ設けら
れた遮断弁とを備えたことを特徴とする石炭粉砕機の不
活性化装置。1. A pipeline for supplying seal air to a sliding portion of a coal crusher, a pipeline for merging with the pipeline to supply an inert gas, and an upstream of the confluence of the two pipelines, respectively. A deactivation device for a coal crusher, comprising: a shutoff valve provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989120911U JP2503123Y2 (en) | 1989-10-18 | 1989-10-18 | Coal crusher deactivation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989120911U JP2503123Y2 (en) | 1989-10-18 | 1989-10-18 | Coal crusher deactivation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0361942U JPH0361942U (en) | 1991-06-18 |
| JP2503123Y2 true JP2503123Y2 (en) | 1996-06-26 |
Family
ID=31668959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989120911U Expired - Lifetime JP2503123Y2 (en) | 1989-10-18 | 1989-10-18 | Coal crusher deactivation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2503123Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5544832B2 (en) * | 2009-11-16 | 2014-07-09 | 株式会社Ｉｈｉ | Vertical mill |
| JP2012254429A (en) * | 2011-06-10 | 2012-12-27 | Ihi Corp | Inert device of vertical roller mill |
| JP6918641B2 (en) * | 2017-08-25 | 2021-08-11 | 三菱パワー株式会社 | How to operate the crusher and the crusher |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628189Y2 (en) * | 1986-08-07 | 1994-08-03 | バブコツク日立株式会社 | Coal crusher |
-
1989
- 1989-10-18 JP JP1989120911U patent/JP2503123Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0361942U (en) | 1991-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |