JPS6261485B2 - - Google Patents
Info
- Publication number
- JPS6261485B2 JPS6261485B2 JP58116772A JP11677283A JPS6261485B2 JP S6261485 B2 JPS6261485 B2 JP S6261485B2 JP 58116772 A JP58116772 A JP 58116772A JP 11677283 A JP11677283 A JP 11677283A JP S6261485 B2 JPS6261485 B2 JP S6261485B2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- dry ice
- pipe
- pile
- oxidation
- 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 79
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 63
- 235000011089 carbon dioxide Nutrition 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 9
- 230000006866 deterioration Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 description 23
- 238000003860 storage Methods 0.000 description 21
- 230000000694 effects Effects 0.000 description 18
- 230000003647 oxidation Effects 0.000 description 16
- 230000002265 prevention Effects 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 230000002269 spontaneous effect Effects 0.000 description 8
- 238000009834 vaporization Methods 0.000 description 7
- 230000008016 vaporization Effects 0.000 description 7
- 239000003610 charcoal Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- -1 compaction Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G3/00—Storing bulk material or loose, i.e. disorderly, articles
- B65G3/02—Storing bulk material or loose, i.e. disorderly, articles in the open air
Description
【発明の詳細な説明】
本発明は、床面上に石炭を堆積して貯蔵する貯
炭設備において、堆積された石炭の風化、粉化、
自然発火等の劣化を防止する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for weathering, pulverizing, and
This invention relates to a method for preventing deterioration such as spontaneous combustion.
石炭は、これを空気中に放置すると、常温にお
いても酸素を吸収して酸化を受ける。したがつ
て、長期間に亘つて貯炭場等に堆積貯蔵される
と、その堆積の山の内部には上記酸化熱が蓄積さ
れ、石炭の劣化が著しく促進されると共に遂には
自然発火にまで至る危険がある。この発熱作用の
解析は種々行なわれ、その原因は石炭中に含まれ
る黄鉄鉱の酸化反応、バクテリアの活動による発
熱及び石炭自身の酸化反応等であることが知られ
ている。特に、石炭自身の酸化反応は、温度上昇
とともに増大し、ある臨界温度以上になれば自然
発火現象が起こる。 When coal is left in the air, it absorbs oxygen and undergoes oxidation even at room temperature. Therefore, when coal is piled up and stored in a coal storage yard or the like for a long period of time, the above-mentioned oxidation heat is accumulated inside the pile, which significantly accelerates the deterioration of the coal and eventually leads to spontaneous combustion. There is danger. Various analyzes have been conducted on this exothermic effect, and it is known that its causes include the oxidation reaction of pyrite contained in the coal, heat generation due to bacterial activity, and the oxidation reaction of the coal itself. In particular, the oxidation reaction of coal itself increases as the temperature rises, and if the temperature exceeds a certain critical temperature, spontaneous combustion occurs.
上記臨界温度は、石炭の種類や周囲の条件によ
つても異なるが、一般に新鮮な石炭ほど酸素を反
応し易く、風化した石炭ではその傾向が小さい。
一方、自然発火を起こす臨界温度は、風化炭の方
が新鮮炭に比べて高い。そして褐炭は特に酸化に
よる発火傾向が大きいといわれている。 The above critical temperature varies depending on the type of coal and surrounding conditions, but in general, fresher coal is more likely to react with oxygen, and weathered coal is less likely to do so.
On the other hand, the critical temperature for spontaneous combustion is higher for weathered coal than for fresh coal. Brown coal is said to have a particularly high tendency to catch fire due to oxidation.
第１図は、石炭の温度と酸素吸収量との典形的
な関係を示すグラフで、この石炭の場合160℃近
傍で酸化反応が急激に増大することが分かる。 Figure 1 is a graph showing a typical relationship between the temperature of coal and the amount of oxygen absorbed, and it can be seen that in the case of this coal, the oxidation reaction increases rapidly around 160°C.
石炭の酸化及び自然発火は、いくつかのステツ
プを経て起こる。即ち、先ず石炭が徐々に酸素を
吸収し、その重量が増加する段階、次いで温度が
やや高温（80〜140℃）になると酸素の吸収が著
しく多くなると共にCO2、H2Oを生成し、石炭の
重量が減少する段階、さらに温度が230℃以上に
なると、酸化反応が著しく活発になつて温度上昇
を起こし、ついには350℃近傍で発火するとされ
ている。 Coal oxidation and spontaneous ignition occurs through several steps. That is, first, the coal gradually absorbs oxygen and its weight increases, then when the temperature becomes slightly high (80~140°C), the absorption of oxygen increases significantly and CO 2 and H 2 O are produced. When the weight of the coal decreases and the temperature rises above 230°C, the oxidation reaction becomes extremely active, causing a rise in temperature and eventually igniting at around 350°C.
この発火温度は、石炭の種類によつて異なり、
例えば褐炭では150℃、ガス用炭では200℃、コー
クス用炭では250℃、無煙炭では300℃以上であ
る。 This ignition temperature varies depending on the type of coal.
For example, the temperature is 150℃ for lignite, 200℃ for gas coal, 250℃ for coking coal, and 300℃ or more for anthracite.
斯かる石炭の発熱は、石炭の性質のみならず、
その置かれる状態、即ち石炭の粘砕度、通風の状
態、水分、外気の温度等により著しく影響され
る。微細な石炭ほど酸化表面が大きくなるので酸
素と反応し易くなることは当然である。また、空
気から全く遮断されていれば酸化反応は抑止さ
れ、逆に通風が著しく良い場合も酸化による反応
熱が発散されるので温度上昇が抑えられ、酸化反
応はある程度抑制される。しかし中間程度の通風
状態では、適度の酸素供給と酸化熱の蓄積とが助
長され、更に水分が存在すれば石炭酸化の触媒と
なり、黄鉄鉱の酸化が助長されるため、発熱量は
幾何級数的に上昇し、遂には発火点に達するので
ある。 Such heat generation from coal is caused not only by the properties of coal but also by
It is significantly affected by the conditions in which it is placed, such as the degree of viscosity of the coal, ventilation conditions, moisture content, and the temperature of the outside air. It is natural that the finer the coal, the larger the oxidized surface and the easier it is to react with oxygen. In addition, if it is completely shielded from air, the oxidation reaction is suppressed, and conversely, even if there is excellent ventilation, the reaction heat due to oxidation is dissipated, so the temperature rise is suppressed, and the oxidation reaction is suppressed to some extent. However, in medium ventilation conditions, an appropriate amount of oxygen is supplied and the accumulation of oxidation heat is promoted, and the presence of moisture acts as a catalyst for coal oxidation and promotes the oxidation of pyrite, so the calorific value increases in a geometric progression. It rises and finally reaches the ignition point.
従来、上記のような石炭の自然発火対策として
は、水中貯炭法、被覆法、押し固め法、炭酸ガス
吸込み法等の遮断法や、石炭の山に換気筒を設け
たり、穿孔を設ける換気法等が知られているが、
何れの方法も石炭の搬入、搬出に伴い、その都度
上記状態の再調整を必要とし、多大の管理費用を
必要としていた。 Conventionally, measures against the spontaneous ignition of coal as described above include blocking methods such as underwater coal storage, coating, compaction, and carbon dioxide suction, as well as ventilation methods such as installing ventilation pipes in coal piles or drilling holes. etc. are known, but
Either method requires readjustment of the above-mentioned conditions each time the coal is brought in or taken out, resulting in a large amount of management costs.
その後、簡易かつ有効な貯炭法として、石炭堆
積の底面ないし貯炭中に生じる昇温部分までの位
置にドライアイスを置設する方法（特公昭39−
27322号公報）が提案され、賞替を受けた。この
方法は、炭堆の量に対して0.01重量％以上のドラ
イアイスブロツクを、１m2当り１個所の割合で炭
堆中に置設することにより、効果的に発火を防止
することができ、一部で採用された。 Later, a simple and effective coal storage method was developed, in which dry ice was placed at the bottom of the coal pile or at the point where the temperature rose during coal storage (Special Publications Publication No.
Publication No. 27322) was proposed and received the award. In this method, ignition can be effectively prevented by placing dry ice blocks of 0.01% by weight or more based on the amount of charcoal pile in the charcoal pile at a rate of 1 block per 1 m2. It was adopted in some parts.
しかしながら、この方法も、１万トン級の貯炭
量を対象とした場合は、ドライアイスの効果持続
時間が短かく、一度ドライアイスが気化してしま
うと、そのままでは貯炭深部へのドライアイスの
再置設が困難であり、結局長期間の貯蔵には持替
えを行なわざるを得ず、その持替えには多大な労
力が必要である。 However, even with this method, when targeting 10,000 tons of coal storage, the effect of dry ice is short, and once the dry ice vaporizes, it is difficult to re-inject dry ice deep into the storage. It is difficult to install, and after all, for long-term storage, it is necessary to change the storage, and changing the storage requires a lot of effort.
したがつて、上記の方法は原理的には優れたも
のではあるが、ドライアイスの再置設が困難であ
る点で効果が著しく減殺され、結局は従来よりも
石炭の持替え回数を減らすという効果を得るに留
まり、より長期の貯炭には充分な酸化防止や発火
防止効果を得ることができなかつた。 Therefore, although the above method is excellent in principle, its effectiveness is significantly diminished due to the difficulty of repositioning the dry ice, and in the end, the number of coal changes is reduced compared to the conventional method. However, it was not possible to obtain sufficient oxidation prevention and ignition prevention effects for longer-term coal storage.
本発明は、上記事情に鑑みてなされたもので、
ドライアイス置設による優れた石炭酸化防止効果
を、炭堆の持替えをすることなしに長期に亘り継
続させることのできる堆積石炭の劣化防止方法を
提供することを目的とする。 The present invention was made in view of the above circumstances, and
It is an object of the present invention to provide a method for preventing deterioration of piled coal, which can maintain the excellent coal oxidation prevention effect by placing dry ice over a long period of time without changing the coal pile.
以下、本発明を図面を参照して説明する。 Hereinafter, the present invention will be explained with reference to the drawings.
第２図は、本発明を実施するための貯炭設備の
一例を示す縦断面図、第３図は同平面概念図であ
る。 FIG. 2 is a vertical sectional view showing an example of coal storage equipment for implementing the present invention, and FIG. 3 is a conceptual plan view of the same.
これらの図において符号１は、貯炭場床であ
り、通常はコンクリート仕上げがなされている。
この床１には、その面に沿つて内径30〜60mm程度
の金属製パイプからなるドライアイス導入管２が
約５〜６ｍの間隔をもつて配管されている。この
導入管２は、第２図に示すようにその下半分が前
記貯炭場の床１に埋設された状態で、すなわちそ
の上半分が床１から露出された状態で配管されて
いる。従つて、導入管２は、この上部に堆積され
る石炭層とその上半分において直接接触すること
となる。このドライアイス導入管２の端部は、第
３図に示すように炭堆の外側に設置されたドライ
アイス圧送室３に導入されており、圧送室３に設
けられたドライアイスの搬送装置（図示しない）
に接続されている。 In these figures, reference numeral 1 indicates the coal storage floor, which is usually finished with concrete.
Dry ice introduction pipes 2 made of metal pipes having an inner diameter of about 30 to 60 mm are installed along the surface of the floor 1 at intervals of about 5 to 6 m. As shown in FIG. 2, the introduction pipe 2 is installed with its lower half buried in the floor 1 of the coal storage yard, that is, with its upper half exposed from the floor 1. Therefore, the introduction pipe 2 comes into direct contact with the coal seam deposited thereon in its upper half. The end of this dry ice introducing pipe 2 is introduced into a dry ice feeding chamber 3 installed outside the coal pile as shown in FIG. 3, and a dry ice conveying device ( (not shown)
It is connected to the.
前記ドライアイス導入管２の上半分、すなわち
露出部分の管壁には多数の貫通孔４が穿設されて
おり、これにより導入管２が有孔管とされること
で、導入管２内部に充填されたドライアイスが気
化して生じる炭酸ガスが侵出するようになつてい
る。この導入管２は、例えば鉄等の金属パイプな
どが用いられるが、その上部に堆積される石炭層
５１，５２，５３の荷重に耐え、かつ堆炭作業時
にブルドーザー等によつて潰されたり移動したり
することが無いように十分に高い強度をもたせる
ことが必要である。また、導入管２の布設状態に
おいてより高い強度をもたせるためには、導入管
２を第２図に示すようにその下半分を床面下に埋
設固定することが好ましい。 A large number of through holes 4 are bored in the upper half of the dry ice introduction tube 2, that is, the exposed portion of the tube wall, and this makes the introduction tube 2 a perforated tube. The carbon dioxide gas produced by the vaporization of the filled dry ice is now leaching out. This introduction pipe 2 is made of, for example, a metal pipe made of iron or the like, but it can withstand the load of the coal seams 51, 52, 53 deposited on top of it, and is not crushed or moved by a bulldozer or the like during coal pile work. It is necessary to have sufficiently high strength so that it does not cause damage. Further, in order to provide higher strength to the installed state of the introduction pipe 2, it is preferable to bury and fix the lower half of the introduction pipe 2 under the floor surface as shown in FIG.
本発明の劣化防止方法は、上記の貯炭設備にお
いて、ドライアイス圧送室３からチヨーク状ドラ
イアイスあるいは破砕ドライアイス等のドライア
イス細片Ｄを、例えば圧力気体に同伴させる等の
搬送手段によりドライアイス導入管２内部に搬
送、充填して行なう。導入管２に充填されたドラ
イアイス細片Ｄは、導入管２の周囲の炭堆から気
化熱を奪いつつ炭酸ガス化する。そしてこのドラ
イアイス細片Ｄから気化した低温度の炭酸ガス
は、導入管２の貫通孔４を通つて炭堆内へ侵出
し、その底部から炭堆中の空気と置換することで
この空気を炭堆中より排除すると共に、石炭その
ものを冷却し、以て炭堆の酸化及び温度上昇を防
止する作用をする。 The deterioration prevention method of the present invention is such that, in the above-mentioned coal storage equipment, dry ice pieces D such as yoke-shaped dry ice or crushed dry ice are transferred from the dry ice pressure feeding chamber 3 to dry ice by a conveying means such as entraining the dry ice with pressurized gas. This is carried out by transporting and filling the inside of the introduction tube 2. The dry ice pieces D filled in the introduction pipe 2 are converted into carbon dioxide gas while taking vaporization heat from the coal pile around the introduction pipe 2. The low-temperature carbon dioxide vaporized from the dry ice pieces D leaks into the coal pile through the through hole 4 of the introduction pipe 2, and replaces the air in the coal pile from the bottom of the coal pile. In addition to being removed from the coal pile, it also cools the coal itself, thereby preventing oxidation and temperature rise in the coal pile.
また、導入管２内部のドライアイスが気化して
減少または消失した場合には、前述と同様に圧送
室３から導入管２内部にドライアイス細片Ｄを搬
送して補充することができる。従つて、本発明の
方法によれば、炭堆の持替えを全く行なわずに炭
堆底部に常にドライアイスを存在さて、炭堆中に
低温度の炭酸ガスを送り込むことができるので、
長期にわたり大量の石炭を劣化させることなく貯
蔵することができる。また、前述の如く、ドライ
アイスはチヨーク状あるいは破砕されてドライア
イス細片Ｄとして導入管２内に圧送、充填されて
いるので、ブロツク状のドライアイスに比してそ
の表面積が格段に大きく、従つて、ドライアイス
の気化効率が大変優れ、ドライアイスによる酸化
防止効果及び温度上昇防止効果を有効かつ十分に
引き出しうる、という優れた効果を奏する。また
同時に、前記ドライアイス圧送室３等の搬送手段
に大規模なものを必要とせず、大変経済的であ
る。 Further, when the dry ice inside the introduction tube 2 evaporates and decreases or disappears, dry ice pieces D can be transported from the pressure feeding chamber 3 to the inside of the introduction tube 2 to be replenished in the same manner as described above. Therefore, according to the method of the present invention, dry ice is always present at the bottom of the charcoal pile without changing the charcoal pile at all, and low-temperature carbon dioxide gas can be sent into the charcoal pile.
Large amounts of coal can be stored for long periods without deterioration. Furthermore, as mentioned above, the dry ice is compressed and filled into the introduction tube 2 as dry ice pieces D in the form of ice cubes or crushed pieces, so the surface area is much larger than that of block-shaped dry ice. Therefore, the vaporization efficiency of the dry ice is very excellent, and the excellent effect of effectively and fully bringing out the oxidation prevention effect and the temperature rise prevention effect of the dry ice is achieved. Moreover, at the same time, a large-scale conveying means such as the dry ice pumping chamber 3 is not required, which is very economical.
更に言えば、ドライアイス導入管２を金属製と
したことにより、導入管２も前記ドライアイス細
片Ｄにより容易に冷却されうる。従つて、導入管
２の上半分、すなわち石炭層５１と相接する部分
がこの石炭層５１を冷却するので、石炭の冷却効
率がより向上し、前記ドライアイスを細片化した
ことによるドライアイスの気化効率向上と相俟つ
て、炭堆の酸化防止効果及び温度上昇防止効果が
格段に向上する、という優れた効果を奏する。 Furthermore, since the dry ice introduction tube 2 is made of metal, the introduction tube 2 can also be easily cooled by the dry ice pieces D. Therefore, since the upper half of the introduction pipe 2, that is, the portion that contacts the coal seam 51, cools the coal seam 51, the cooling efficiency of the coal is further improved, and the dry ice produced by cutting the dry ice into pieces is improved. Coupled with the improvement in vaporization efficiency, this has the excellent effect of significantly improving the oxidation prevention effect and temperature rise prevention effect of the coal pile.
そして、金属製のドライアイス導入管２をその
下半分が貯炭場の床１内に埋設されるように配設
したことにより、前記導入管２そのものによる石
炭冷却の効率を犠牲にすることなく、導入管２の
強度を高強度に維持することができると共に、炭
堆の搬入、搬出等の持替え作業時にこの導入管２
が作業の邪魔になることがない。 By arranging the metal dry ice introduction pipe 2 so that its lower half is buried in the floor 1 of the coal storage yard, the efficiency of coal cooling by the introduction pipe 2 itself is not sacrificed. The strength of the introduction pipe 2 can be maintained at a high level, and this introduction pipe 2 can be
will not interfere with your work.
なお、図示したような貯炭設備は、炭堆が異常
に昇温したり、着火した場合に、前記圧送室３よ
り導入管２に水または水とドライアイスを圧入
し、貫通孔４から噴出させることにより炭堆の迅
速な冷却、消火に利用することができる。 In addition, in the coal storage equipment as shown, when the temperature of the coal pile rises abnormally or ignites, water or water and dry ice are forced into the introduction pipe 2 from the pressure feeding chamber 3 and are ejected from the through hole 4. This can be used for rapid cooling of coal piles and extinguishing fires.
以上詳細に説明したように、本発明による堆積
石炭の劣化防止方法は、貯炭場の床面に沿つて金
属製の管を配設すると共に、この管の下半分を前
記貯炭場の床面に埋設し、かつ、この管の露出部
分に多数の貫通孔を形成することでこの管を有孔
管とし、この有孔管にドライアイス細片を搬送充
填することにより、炭堆中に常にドライアイスの
気化による低温度の炭酸ガスを効率良く送り込む
ようにしたから、炭酸ガスのもつ優れた酸化防止
効果及び自然発火防止効果を十分かつ長期にわた
つて継続させることができ、その結果石炭の持替
えなしに長期保存が可能となり、延いては資源保
存に貢献することができる等の効果を奏する。特
に、ドライアイスを細片化して有孔管内に搬送、
充填しているので、ドライアイスの気化効率が格
段に向上することで、前述の炭酸ガスの酸化防止
効果及び自然発火防止効果を有効かつ十分に引き
出すことが可能となると共に、この有孔管もドラ
イアイスにより同時に冷却されるので、有孔管そ
のものが石炭の冷却媒体となり、これにより前記
ドライアイスの気化効率向上と相俟つて、炭堆の
酸化防止効果及び温度上昇防止効果が格段に向上
する、という優れた効果を奏する。更に、有孔管
の下半分を貯炭場床面に埋設したことにより、前
記有孔管による石炭冷却の効率を犠牲にすること
なく、有孔管の強度を高強度に維持することがで
きると共に、前述の炭堆持替え作業時にこの有孔
管が作業の邪魔とならない、という優れた効果も
奏する。 As explained in detail above, the method for preventing deterioration of piled coal according to the present invention includes arranging metal pipes along the floor of a coal storage yard, and attaching the lower half of this pipe to the floor of the coal storage yard. By burying the pipe and forming a large number of through holes in the exposed part of the pipe, this pipe becomes a perforated pipe, and by transporting and filling this perforated pipe with dry ice pieces, it is possible to keep the coal pile dry at all times. By efficiently delivering low-temperature carbon dioxide gas from the vaporization of ice cream, the excellent oxidation and spontaneous combustion prevention effects of carbon dioxide gas can be maintained sufficiently and over a long period of time, and as a result, the longevity of coal can be improved. It can be stored for a long time without being replaced, which has the effect of contributing to resource conservation. In particular, we cut dry ice into small pieces and transport them into perforated pipes.
Since the dry ice is filled with air, the vaporization efficiency of dry ice is greatly improved, making it possible to effectively and fully utilize the oxidation prevention effect and spontaneous combustion prevention effect of carbon dioxide gas mentioned above. Since it is simultaneously cooled by dry ice, the perforated pipe itself becomes a cooling medium for the coal, and this, together with the improvement in vaporization efficiency of the dry ice, significantly improves the oxidation prevention effect and temperature rise prevention effect of the coal pile. , it has an excellent effect. Furthermore, by burying the lower half of the perforated pipe in the floor of the coal storage area, the strength of the perforated pipe can be maintained at a high level without sacrificing the efficiency of coal cooling by the perforated pipe. Another advantageous effect is that the perforated pipe does not interfere with the work during the above-mentioned charcoal pile changing work.
第１図は石炭の温度と酸素吸収量との関係の一
例を示すグラフ、第２図は本発明を実施するため
の貯炭設備の縦断面図、第３図は同平面概念図で
ある。
１……貯炭場の床面、２……ドライアイス導入
管（有孔管）、４……貫通孔。
FIG. 1 is a graph showing an example of the relationship between coal temperature and oxygen absorption amount, FIG. 2 is a longitudinal sectional view of a coal storage facility for implementing the present invention, and FIG. 3 is a conceptual plan view of the same. 1... Floor surface of coal storage yard, 2... Dry ice introduction pipe (perforated pipe), 4... Through hole.
Claims (1)
と共に、この管の下半分を前記貯炭場床面に埋設
し、かつ、この管の露出部分に多数の貫通孔を形
成することでこの管を有孔管とし、この有孔管の
内部にドライアイス細片を搬送して充填すること
で、このドライアイス細片から生じる炭酸ガスを
堆積石炭内部に侵出せしめることを特徴とする堆
積石炭の劣化防止方法。1. Arranging a metal pipe along the floor of the coal stockyard, burying the lower half of this pipe in the floor of the coal stockyard, and forming a large number of through holes in the exposed portion of the pipe. This pipe is made into a perforated pipe, and by transporting and filling the inside of this perforated pipe with dry ice pieces, the carbon dioxide gas generated from the dry ice pieces is allowed to seep into the inside of the deposited coal. A method for preventing deterioration of deposited coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58116772A JPS6012405A (en) | 1983-06-28 | 1983-06-28 | Prevention against deterioration in piling coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58116772A JPS6012405A (en) | 1983-06-28 | 1983-06-28 | Prevention against deterioration in piling coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6012405A JPS6012405A (en) | 1985-01-22 |
| JPS6261485B2 true JPS6261485B2 (en) | 1987-12-22 |
Family
ID=14695340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58116772A Granted JPS6012405A (en) | 1983-06-28 | 1983-06-28 | Prevention against deterioration in piling coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6012405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122143U (en) * | 1990-03-27 | 1991-12-13 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7054477B2 (en) * | 2018-06-19 | 2022-04-14 | 中国電力株式会社 | Raw material storage method |
| WO2020195863A1 (en) | 2019-03-28 | 2020-10-01 | Ｊｆｅスチール株式会社 | Method for producing coal mixture and method for producing coke |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5269902A (en) * | 1975-12-10 | 1977-06-10 | Sumitomo Metal Ind Ltd | Prevention of spontaneous heat evolution of heaped coal |
| JPS54100401A (en) * | 1978-01-25 | 1979-08-08 | Mitsubishi Chem Ind Ltd | Cooling of coal in coal yard |
-
1983
- 1983-06-28 JP JP58116772A patent/JPS6012405A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5269902A (en) * | 1975-12-10 | 1977-06-10 | Sumitomo Metal Ind Ltd | Prevention of spontaneous heat evolution of heaped coal |
| JPS54100401A (en) * | 1978-01-25 | 1979-08-08 | Mitsubishi Chem Ind Ltd | Cooling of coal in coal yard |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122143U (en) * | 1990-03-27 | 1991-12-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6012405A (en) | 1985-01-22 |
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