JPS6125044B2 - - Google Patents
Info
- Publication number
- JPS6125044B2 JPS6125044B2 JP188581A JP188581A JPS6125044B2 JP S6125044 B2 JPS6125044 B2 JP S6125044B2 JP 188581 A JP188581 A JP 188581A JP 188581 A JP188581 A JP 188581A JP S6125044 B2 JPS6125044 B2 JP S6125044B2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- fine
- fine coal
- pipe
- pulverizer
- 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
Links
- 239000003245 coal Substances 0.000 claims description 97
- 238000000034 method Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Air Transport Of Granular Materials (AREA)
Description
【発明の詳細な説明】
この発明は、貯炭場り貯えた細炭を微粉砕機を
経てボイラ等のバーナまで連続輸送する微粉炭の
空気輸送方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pneumatically transporting pulverized coal, in which pulverized coal stored in a coal storage yard is continuously transported to a burner such as a boiler via a pulverizer.
従来、細炭の輸送は、貯炭場から微粉砕機ま
で、細炭をブルドーザのようなスクレーバまたは
リクレーマによつてコンベヤに乗せ、コンベヤの
最先端のシユートすなわちトリツパから、所要の
コールバンカーに落とすことによりなされてい
た。また微粉炭の輸送は、微粉砕機においてコー
ルバンカーからの細炭を微粉化した微粉炭を、こ
こからバーナまで微粉砕機への加熱空気の送入に
よつて空気輸送することによりなされていた。し
かしこのような輸送方法では、スクレーバやトリ
ツパなどの操作は手動でなされるため人手を要
し、さらに大容量のコールバンカーを設置する必
要があつた。また細炭をコンベヤで輸送するため
に、飛散した粉塵による環境汚染や作業衛生上の
問題もかかえていた。 Traditionally, fine coal is transported from a coal storage yard to a pulverizer by placing it on a conveyor using a scraper or reclaimer such as a bulldozer, and then dropping it from a chute or tripper at the top of the conveyor into the required coal bunker. It was done by In addition, pulverized coal was transported in a pulverizer by pulverizing the pulverized coal from the coal bunker and transporting the pulverized coal pneumatically from here to the burner by supplying heated air to the pulverizer. . However, with this transportation method, operations such as the scraper and tripper were performed manually, which required manpower, and it was also necessary to install a large-capacity coal bunker. In addition, fine coal was transported by conveyor, which caused environmental pollution and work hygiene problems due to scattered dust.
この発明は、上記のような問題に鑑みてなされ
たものであつて、微細粉炭を自動的にかつ衛生的
に連続輸送し得る輸送方法を提供することを目的
とする。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a transportation method that can continuously transport fine powder coal automatically and hygienically.
すなわち、この発明は、貯炭槽の細炭を同槽か
ら分離機に送風機による吸引空気で送るととも
に、分離機から微粉砕機に流下した細炭の粉砕に
つて得られた微粉炭を微粉砕機からバーナまで上
記送風機による加圧空気で送ることを要旨とする
微細粉炭の空気輸送方法である。 That is, this invention sends fine coal in a coal storage tank from the tank to a separator using suction air from a blower, and also uses the pulverized coal obtained by pulverizing the fine coal that has flowed down from the separator to a pulverizer into a pulverizer. This is a method for pneumatically transporting fine powder coal, the gist of which is to send it from the burner to the burner using pressurized air using the blower.
まず、この発明の輸送方法を実施するための輸
送装置について説明する。 First, a transportation device for carrying out the transportation method of the present invention will be described.
第１図は微細粉炭の空気輸送装置全体を示す。
同装置は、細炭を貯える貯炭槽１と、細炭を微粉
砕する微粉砕機３１と、貯炭槽１から微粉砕機３
１に配された細炭輸送管４１と、微粉砕機を燃焼
するバーナ５１と、微粉砕機３１からバーナ５１
に配された微粉炭輸送管６１と、細炭輸送管４１
内部を送り方向に吸引しかつ微粉炭輸送管６１内
部を送り方向に送風する送風機７１とを主体とす
る。 FIG. 1 shows the entire pneumatic transportation device for fine pulverized coal.
The device consists of a coal storage tank 1 for storing fine coal, a pulverizer 31 for pulverizing the fine coal, and a pulverizer 3 from the coal storage tank 1.
1, a burner 51 that burns the pulverizer, and a burner 51 from the pulverizer 31.
The pulverized coal transport pipe 61 and the fine coal transport pipe 41 arranged in
The main body is a blower 71 that sucks the inside in the feeding direction and blows air inside the pulverized coal transport pipe 61 in the feeding direction.
貯炭槽１は、頂部の細炭装入管２と、傾斜底壁
３と、その傾斜下端の水分離溝４と、これに通じ
る槽外の排水槽５を有する。また貯炭槽１の底部
には、これを貫通するように多数の細炭吸引管６
が水平に配されている。各細炭吸引管６は、槽外
の吸気端に吸気弁７を介して吸気口８を有し、槽
外の排気端に排気弁９を介してヘツダ１０に接続
している。そしてヘツダ１０が細炭輸送管４１に
接続している。また各細炭吸引管６の吸引端部に
は圧縮機１１から来る圧縮空気送入管１２が接続
し、排気端部にはサイトグラス１３が設けてあ
る。 The coal storage tank 1 has a fine coal charging pipe 2 at the top, a sloped bottom wall 3, a water separation groove 4 at the sloped lower end thereof, and a drainage tank 5 outside the tank communicating with the water separation groove 4. In addition, a large number of fine coal suction pipes 6 are provided at the bottom of the coal storage tank 1 so as to penetrate therethrough.
are arranged horizontally. Each fine coal suction pipe 6 has an intake port 8 at an intake end outside the tank through an intake valve 7, and is connected to a header 10 through an exhaust valve 9 at an exhaust end outside the tank. The header 10 is connected to a fine coal transport pipe 41. Further, a compressed air supply pipe 12 coming from a compressor 11 is connected to the suction end of each fine coal suction pipe 6, and a sight glass 13 is provided at the exhaust end.
各細炭吸引管６は、第２図、第４図に示すよう
に、槽内部に長さ方向に所要間隔おきに両側に側
方突出状の多数の分岐管１４を有する。各分枝管
１４は、頂部、側部および斜下部に長さ方向に所
要間隔おきにそれぞれ細炭導入管１を有する。ま
た各細炭吸引管６も、頂部および斜下部に長さ方
向に所要間隔おきに細炭導入管１６を有する。 As shown in FIGS. 2 and 4, each fine coal suction tube 6 has a large number of laterally projecting branch tubes 14 on both sides at required intervals in the longitudinal direction inside the tank. Each branch pipe 14 has fine charcoal introduction pipes 1 at required intervals in the length direction at the top, side, and diagonally lower part. Each fine charcoal suction tube 6 also has fine charcoal introduction tubes 16 at predetermined intervals in the length direction at the top and diagonally lower part.
細炭輸送管４１は、後端端部にサイトグラス４
２を有する。また微粉砕機３１は入口側にホツパ
状の分離器４３と、その下の計量機４４と備えて
いる。そして細炭輸送管４１は後流端にて分離器
４３に接続している。 The fine coal transport pipe 41 has a sight glass 4 at its rear end.
It has 2. Further, the pulverizer 31 is equipped with a hopper-like separator 43 on the inlet side and a weighing machine 44 below the hopper-like separator 43. The fine coal transport pipe 41 is connected to a separator 43 at its downstream end.
送風機７１は、分離器４３の頂部から送風機７
１に至る空気吸引管７２と、送風機７１から微粉
砕機３１の底部に至る空気圧送管７３とを有す
る。空気吸引管７２は吸気停止弁７４を有し、ま
た同管７２には吸気弁７５を有する吸気管７６が
配されている。空気圧送管７３は、送風機７１寄
りの圧送停止弁７７と、空気加熱器７８と、これ
の入口側の制御弁７９とを有する。また制御弁７
９の入口側と空気加熱器７８の出入口側にまたが
つて、制御弁８０を有するバイパス管８１が配さ
れている。 The blower 71 is connected from the top of the separator 43 to the blower 71.
1, and a pneumatic feed pipe 73 that extends from the blower 71 to the bottom of the pulverizer 31. The air suction pipe 72 has an intake stop valve 74 , and an intake pipe 76 having an intake valve 75 is arranged in the air suction pipe 72 . The pneumatic feed pipe 73 has a pressure feed stop valve 77 near the blower 71, an air heater 78, and a control valve 79 on the inlet side thereof. Also, the control valve 7
A bypass pipe 81 having a control valve 80 is disposed astride the inlet side of the air heater 9 and the inlet/outlet side of the air heater 78 .
微粉炭輸送管６１は後流端にて多数本に分岐
し、分岐部がボイラ５２の多数のバーナ５１に接
続している。ボイラ５２は水管５３、ドラム５
４、脱硝装置５５および燃焼用空気供給管５６を
有する。 The pulverized coal transport pipe 61 branches into a large number of pipes at the downstream end, and the branched portions are connected to a large number of burners 51 of the boiler 52 . The boiler 52 has a water pipe 53 and a drum 5.
4, it has a denitrification device 55 and a combustion air supply pipe 56.
上記構造の微細粉炭の空気輸送装置において、
専用船から陸揚げされた粒径２〜３mmの細炭は、
細炭送入管２から貯炭槽１内に装入される。槽内
に満たされた細炭は水分を含んでいるが、第３図
に示すように、水分は傾斜底壁３をつたつて水分
離溝４に流下し、排水溝５から除去される。こう
して表面水分を分離された細炭は、細炭導入管１
５から分枝管１４を介して細炭吸引管６に、また
細炭導入管１６から直接細炭吸引管６に流入す
る。細炭の輸送停止時には、第５図に示すよう
に、細炭導入管１５，１６からの流入によつて形
成された細炭の山の頂点が、細炭導入管１５，１
６の流出端に接して、細炭の流入が停止する。こ
の状態で送風機７１が作動されると、細炭吸引管
６および細炭輸送管４１の内部空気は、送風機７
１の方向に吸引されて減圧せられる。そして管内
圧が所定値以下になると、吸気弁７および排気弁
９が自動的に開いて、細炭吸引管６および細炭輸
送管４１内の空気流の流速は、細炭を輸送できる
値まで高まる。こうして細炭は貯炭槽１から微粉
砕機３１に備付けられた分離器４３まで、吸引空
気輸送につて送られる。 In the pneumatic transportation device for fine powder coal having the above structure,
Fine coal with a grain size of 2 to 3 mm is unloaded from a special ship.
The fine coal is charged into the coal storage tank 1 through the feed pipe 2. The fine coal filled in the tank contains moisture, but as shown in FIG. 3, the moisture flows down the inclined bottom wall 3 into the water separation groove 4 and is removed from the drainage groove 5. The fine coal from which the surface moisture has been separated is transported to the fine coal introduction pipe 1.
5 to the fine coal suction pipe 6 via the branch pipe 14, and directly to the fine coal suction pipe 6 from the fine coal introduction pipe 16. When transport of fine coal is stopped, as shown in FIG.
6, the inflow of fine coal stops. When the blower 71 is operated in this state, the air inside the fine coal suction pipe 6 and the fine coal transport pipe 41 is transferred to the blower 71.
It is sucked in one direction and the pressure is reduced. When the pipe internal pressure falls below a predetermined value, the intake valve 7 and exhaust valve 9 automatically open, and the flow velocity of the air flow in the fine coal suction pipe 6 and fine coal transport pipe 41 reaches a value that allows fine coal to be transported. It increases. In this way, the fine coal is sent from the coal storage tank 1 to the separator 43 provided in the pulverizer 31 by suction air transport.
なお、細炭の流動状態はサイトグラス１３，４
２を通して確認せられる。また多数の細炭吸引管
６すべてを同時に使用すると、ヘツダ１０および
細炭輸送管４１が詰まるおそれがあるので、吸気
弁７を排気弁９を各細炭吸引管６ごとに順次開い
て、各管６を順次使用するとよい。さらに長期間
輸送停止がつづくと、細炭吸引管６，分枝管１
４，細炭導入管１５，１６，ヘツダ１０および細
炭輸送管４１の各内面に細炭が付着して輸送困難
をきたすおそれがあるので、細炭吸引管６に圧縮
空気送入管１２から定期的に圧縮空気を送込ん
で、各管内の掃除を行う。 In addition, the flow state of fine coal is shown in sight glasses 13 and 4.
This can be confirmed through 2. Furthermore, if all the fine coal suction pipes 6 are used at the same time, there is a risk that the header 10 and the fine coal transport pipe 41 will become clogged. It is preferable to use the tubes 6 one after the other. If transportation continues to be stopped for an even longer period of time, fine coal suction pipe 6, branch pipe 1
4. To prevent fine coal from adhering to the inner surfaces of the fine coal introduction pipes 15 and 16, the header 10, and the fine coal transport pipe 41 and causing transport difficulties, connect the compressed air supply pipe 12 to the fine coal suction pipe 6. Clean the inside of each pipe by blowing compressed air periodically.
細炭は分離機４３によつて輸送用空気と分離さ
れ、計量機４４に流下し、計量後微粉砕機３１に
送入される。微粉砕機３１において、粒径２〜３
mmの細炭は粉粒径75μの微粉炭に粉砕される。 The fine coal is separated from the transportation air by the separator 43, flows down to the weighing machine 44, and after being weighed, is sent to the pulverizer 31. In the pulverizer 31, the particle size is 2 to 3.
mm fine coal is ground into pulverized coal with a particle size of 75μ.
他方、分離機４３において細炭と分離された輸
送用空気は、空気吸引管７２を経て送風機７１に
吸込まれると同時に、送風機７２によつて空気圧
送管７３に吐出される。この加圧空気は空気加圧
室７８で加熱されて微粉砕機３１に送入される。
空気の加熱温度は、細炭の揮発成分の割合や微粉
砕機の構造などにより決定され、空気加熱器７８
の制御は制御弁７９，８０の調節によりなされ
る。なお、、吸気停止弁７４が閉じて細炭輸送が
停止した時に、分離器４３内に滞留している細炭
は、微粉砕機３１での微粉砕のための吹き上げ空
気を必要とするか、この空気は吸気弁７５の調節
によつて吸気管７６から空気吸引管７２に吸込ま
れ、微粉砕機３１に送られる。 On the other hand, the transportation air separated from the fine coal in the separator 43 is sucked into the blower 71 through the air suction pipe 72 and simultaneously discharged into the pneumatic feed pipe 73 by the blower 72 . This pressurized air is heated in the air pressurization chamber 78 and sent to the pulverizer 31.
The heating temperature of the air is determined by the proportion of volatile components in the fine coal, the structure of the pulverizer, etc.
is controlled by adjusting control valves 79 and 80. In addition, when the intake stop valve 74 is closed and fine coal transportation is stopped, does the fine coal staying in the separator 43 require blowing up air for pulverization in the pulverizer 31? This air is sucked into the air suction pipe 72 from the suction pipe 76 by adjusting the suction valve 75, and is sent to the pulverizer 31.
微粉砕機３１にて得られた微粉炭は、加圧空気
によつて微粉炭輸送管６１を経てボイラ５２のバ
ーナ５１に圧送される。なお、微粉炭が水分を多
く含んでいると、同管６１の内面に付着して管詰
りをきたすおそれがあるが、微粉砕機３１に送ら
れる加圧空気は加熱されているため、微粉炭の水
分量は少なくなされ、輸送は支障なくなされる。 The pulverized coal obtained by the pulverizer 31 is sent under pressure to the burner 51 of the boiler 52 via the pulverized coal transport pipe 61 by pressurized air. If the pulverized coal contains a lot of water, it may adhere to the inner surface of the tube 61 and cause clogging, but since the pressurized air sent to the pulverizer 31 is heated, the pulverized coal The moisture content of the product can be reduced and transportation can be carried out without any problems.
この発明による微細粉炭の空気輸送方法によれ
ば、貯炭槽の細炭をここから分離機に送風機によ
る吸引空気で送るとともに、微粉砕機にて得られ
た微粉炭をここからバーナまで上記送風機による
加圧空気で送るので、細炭を貯炭槽から微粉砕機
を経てここで微粉炭化後バーナまで自動的にかつ
連続的に輸送することができる。したがつてこの
発明による輸送方法では人手が全く必要でない上
に、従来技術のようにコンベアが必要でないため
粉塵による環境汚染や衛生上の問題をまねくおそ
れがなく、また上記のように貯炭槽からバーナま
で一貫した連続輸送がなし得るため、従来のよう
に細炭を一旦貯蔵しておくための大容量のコール
バンカーを設置する必要がなく、設備の設置スペ
ースおよび設備費の点で利点が大きい。さらに細
炭輸送用の吸引空気の生成と微粉炭輸送用の加圧
空気の生成とを一台の送風機で行なうので、この
点でも設備費の節減が果たせる上に、微粉炭の輸
送を加圧空気で行なうので、微粉炭の乾燥も併せ
て行なうことができる。 According to the pneumatic transportation method for fine pulverized coal according to the present invention, the fine coal in the coal storage tank is sent from here to the separator by suction air by a blower, and the pulverized coal obtained by the pulverizer is transported from here to the burner by the blower. Since the fine coal is sent by pressurized air, it is possible to automatically and continuously transport the fine coal from the coal storage tank to the burner after pulverization through the pulverizer. Therefore, the transportation method according to the present invention does not require any human labor, and unlike the prior art, it does not require a conveyor, so there is no risk of environmental pollution or hygiene problems caused by dust, and as mentioned above, the transportation method does not require any human labor. Since continuous and consistent transportation to the burner is possible, there is no need to install a large-capacity coal bunker to temporarily store fine coal as in the past, which is a major advantage in terms of equipment installation space and equipment costs. . Furthermore, since a single blower is used to generate suction air for transporting fine coal and pressurized air for transporting pulverized coal, equipment costs can be reduced in this respect as well. Since the process is carried out using air, the pulverized coal can also be dried at the same time.
図面はこの発明の実施に使用される微細粉炭の
空気輸送装置を示すもので、第１図は同装置全体
を示すフロー図、第２図は貯炭槽の水平断面図、
第３図は第１図中のＡ部拡大図、第４図イ，ロは
第２図中のＢ部拡大図およびその側面図、第５図
は第４図中のＣ部拡大図である。
１……貯炭槽、３１……微粉砕機、４１……細
炭輸送管、５１……バーナ、６１……微粉炭輸送
管、７１……送風機。
The drawings show a pneumatic transportation device for fine pulverized coal used in carrying out the present invention; FIG. 1 is a flow diagram showing the entire device; FIG. 2 is a horizontal sectional view of a coal storage tank;
Figure 3 is an enlarged view of part A in Figure 1, Figure 4 A and B are an enlarged view of part B in Figure 2 and its side view, and Figure 5 is an enlarged view of part C in Figure 4. . 1... Coal storage tank, 31... Fine pulverizer, 41... Fine coal transport pipe, 51... Burner, 61... Pulverized coal transport pipe, 71... Air blower.
Claims (1)
る吸引空気で送るとともに、分離機から微粉砕機
に流下した細炭の粉砕によつて得られた微粉炭
を、微粉砕機からバーナまで上記送風機による加
圧空気で送ることを特徴とする微細粉炭の空気輸
送方法。1. The fine coal in the coal storage tank is sent from the tank to the separator using suction air from a blower, and the pulverized coal obtained by crushing the fine coal that has flowed down from the separator to the pulverizer is transported from the pulverizer to the burner. A method for pneumatically transporting fine powder coal, characterized in that the air is transported using pressurized air using the blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP188581A JPS57117414A (en) | 1981-01-08 | 1981-01-08 | Method of conveying finely-pulverized coal by air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP188581A JPS57117414A (en) | 1981-01-08 | 1981-01-08 | Method of conveying finely-pulverized coal by air |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57117414A JPS57117414A (en) | 1982-07-21 |
| JPS6125044B2 true JPS6125044B2 (en) | 1986-06-13 |
Family
ID=11514017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP188581A Granted JPS57117414A (en) | 1981-01-08 | 1981-01-08 | Method of conveying finely-pulverized coal by air |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57117414A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57117415A (en) * | 1981-01-12 | 1982-07-21 | Hitachi Zosen Corp | Method of conveying finely-pulverized coal by air |
| JPS59132371U (en) * | 1983-02-21 | 1984-09-05 | 株式会社東芝 | Immersion type varnish impregnation treatment equipment |
-
1981
- 1981-01-08 JP JP188581A patent/JPS57117414A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57117414A (en) | 1982-07-21 |
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