JP3377263B2 - Crusher explosion prevention device - Google Patents
Crusher explosion prevention deviceInfo
- Publication number
- JP3377263B2 JP3377263B2 JP25995493A JP25995493A JP3377263B2 JP 3377263 B2 JP3377263 B2 JP 3377263B2 JP 25995493 A JP25995493 A JP 25995493A JP 25995493 A JP25995493 A JP 25995493A JP 3377263 B2 JP3377263 B2 JP 3377263B2
- Authority
- JP
- Japan
- Prior art keywords
- crusher
- oxygen concentration
- amount
- water vapor
- explosion
- 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 - Fee Related
Links
Landscapes
- Disintegrating Or Milling (AREA)
- Crushing And Pulverization Processes (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、廃棄物の破砕機内で可
燃性ガスが爆発するのを防止するために水蒸気を供給す
る破砕機の爆発防止装置に関する。
【０００２】
【従来の技術】都市ごみなどの廃棄物は分別収集され、
収集された粗大、不燃ごみなどは破砕機にかけて破砕し
ているが、この破砕時には鉄などの不燃ごみに衝撃、剪
断などの力が加えられるため火花が生じて、ごみに混入
した可燃性ガスが爆発する恐れがある。そのため、保安
上の問題から、この爆発を防止する手段を講じる必要が
ある。
【０００３】このような防止技術としては特開昭５６−
８９８４９号公報に開示の技術がある。この技術は回転
破砕機内へ水蒸気や窒素ガス、炭酸ガスなどを充満さ
せ、破砕機内の酸素濃度をほぼゼロとして可燃性ガスの
爆発を防止せんとするものである。
【０００４】この技術に比べ、より経済的に可燃性ガス
の爆発を防止せんとする技術としては特公平２−３３４
２１号公報に開示の技術がある。これは破砕装置の機内
温度を測定し、この測定値に基づいて破砕装置内への蒸
気送気量をコントロールして機内各部の水蒸気濃度を一
定の範囲内に保つことにより、機内の酸素濃度を爆発の
阻止が可能な範囲の濃度に維持して爆発を未然に防止す
る構成としている。上述の特開昭５６−８９８４９号公
報に開示の技術においては、蒸気の使用量が著しく大き
く極めて不経済なものとなってしまうが、本技術によれ
ば、一定の必要量に制限されるため、経済的である。
【０００５】しかし乍ら、この技術は破砕機内部または
破砕機表面の温度を測定し、この検出温度に基づいて水
蒸気量を調節するものであり、次のような問題がある。
すなわち、(1) 破砕機内部の温度上昇は、破砕作用によ
る発熱もあることから、必ずしも供給される水蒸気のみ
が破砕機内の温度を左右する要素とはいえない。(2)破
砕機表面温度は、たとえ破砕機に保温を施してあって
も、外気との間で必ず温度勾配が生じる。このため、破
砕機表面温度は破砕機内の温度を反映しておらず、この
温度に基づいて水蒸気量を調節すると適切な水蒸気量に
調節できなくなる。(3) 破砕機内部または破砕機表面温
度の変化は比較的緩慢であり、水蒸気量の調節に時間遅
れが生じやすい。したがって、特公平２−３３４２１号
公報に開示の技術によっては、適切な水蒸気量に調節す
ることが困難であり、適切な水蒸気量に保てないことに
よって、可燃性ガスの爆発が生じる可能性は高い。
【０００６】水蒸気量を適切に保って可燃性ガスの爆発
を十分に防止し、かつ、この爆発の防止を経済的に行な
うには、温度検出によるのではなく直接酸素濃度を検出
し、この検出値に基づいて水蒸気量を調節することが必
要である。
【０００７】
【発明が解決しようとする課題】しかし、酸素濃度を検
出し、この検出値に基づいて水蒸気量を調節したとして
も、それのみでは水蒸気量の適切な調節のためには未だ
不十分である。すなわち、破砕機内に可燃性ガスが存在
する場合は、酸素濃度を検出しても実際の酸素濃度より
幾分低い値を示す。そのため、酸素濃度の検出値に基づ
いて水蒸気量を調節しても、水蒸気の供給量が現実の必
要量より許容範囲を超えて下回ってしまうことがある。
また、酸素濃度検出器が破砕物の飛散や粉塵の流れの影
響を受けて破損しあるいは測定不能となり、酸素濃度の
調節ができなくなって可燃性ガスの爆発を生じる可能性
もある。
【０００８】本発明はこのような課題を解決し、従来の
技術に比べて可燃性ガスの爆発の防止を十分に図ること
ができる破砕機の爆発防止装置を提供することを目的と
する。
【０００９】上記課題を解決するために、本発明の破砕
機の爆発防止装置は、廃棄物を破砕する破砕機の内部又
はその近傍の１又は複数の検出点で酸素濃度を検出する
酸素濃度検出器と、この酸素濃度検出器による酸素濃度
検出値に基づき前記破砕機に供給する水蒸気量を制御す
る制御弁とを備え、この制御弁の開度は前記酸素濃度検
出値の如何にかかわらず酸素濃度が１３ｖｏｌ％を超え
ないように下限値が設定されていることを特徴とする。
【００１０】
【作用】本発明においては、酸素濃度検出値の如何に拘
らず水蒸気供給量は予め定めた一定値を下回らないよう
にするため、この水蒸気供給量の下限値を有している。
したがって、爆発を生じさせないために最低限必要と思
われる適切な値をこの下限値とすれば、酸素濃度検出器
による酸素濃度検出値が、破砕機内に可燃性ガスが存在
することにより実際の酸素濃度より下回ってしまった
り、酸素濃度検出器が破砕物の飛散などで破損などし
て、酸素濃度の調節ができない事態となっても、水蒸気
供給量がこの下限値を下回ることはない。よって、水蒸
気量が許容限度を超えて不足することはなく、従来の技
術に比べて可燃性ガスの爆発の防止を十分に図ることが
できる。
【００１１】酸素濃度は、破砕機内などの雰囲気の１１
〜１２ｖｏｌ％程度を維持すべく調節するのが望ましい
と思われる。したがって、酸素濃度検出器による酸素濃
度検出値が常時この値になるべく、本発明の制御装置に
より水蒸気量を増減して調節するのが望ましい。また、
破砕機内の爆発を十分に防止するためには、酸素濃度が
１３ｖｏｌ％程度より大きくならないようにするのが望
ましい。しかし、現実に酸素濃度が１３ｖｏｌ％を超え
る大きさになっても、上述のように、より低い酸素濃度
値を示す場合があるので、酸素濃度が１３ｖｏｌ％程度
より大きくならないようにするのであれば、酸素濃度を
１３ｖｏｌ％程度に維持するのに必要と思われる水蒸気
量を本発明の下限値とし、酸素濃度検出値の如何にかか
わらず、この値より水蒸気供給量が下回らないようにす
ればよい。
【００１２】酸素濃度検出値に対応する、水蒸気供給量
は、酸素濃度を１１〜１２ｖｏｌ％程度とする場合であ
れば、破砕機内の雰囲気中の水蒸気の混入率で、４３〜
４８ｖｏｌ％程度であり、下限値となる水蒸気供給量
は、同じく水蒸気の混入率で、３８ｖｏｌ％程度とな
る。破砕機に供給するより具体的な水蒸気量は、破砕機
内への通風量が破砕機の型番や回転数など個々の破砕機
により異なるため様々である。
【００１３】
【実施例】以下、本発明の実施例を図面を参照しつつ説
明する。図１は本発明の一実施例である破砕機の爆発防
止装置を設けたごみ破砕処理設備の系統図である。１は
受入ホッパであり、破砕処理されるごみは、まず、この
受入ホッパ１に投入される。投入されたごみは供給コン
ベア２で回転破砕機８に送りこまれる。ごみは回転破砕
機８で破砕後、排出コンベア１２によりごみ破砕処理設
備から排出され、ベルトコンベア１６で次の工程に搬送
される。
【００１４】回転破砕機８はスイングハンマー式であ
り、高速で回転して（６０Ｈｚの地域では９００ｒｐ
ｍ、５０Ｈｚの地域では１０００ｒｐｍ）、粗大ごみや
不燃ごみを目的の粒度に破砕するものである。破砕機８
はハンマ８１を有するロータ８２を備えており、このロ
ータ８２が回転すると、空気を吸引し、図に示す破砕機
８の下方から上方への空気の流れが生じる。なお、この
ような空気の流れやごみの流れについては、図１中に矢
印で示している。
【００１５】破砕機８に供給する水蒸気は破砕機８の下
部に設けた吹き込みノズル９より供給し、上昇する上述
の空気の流れと混合され、ケージバー８４を通過し、破
砕機８内に流入する。破砕機８内の酸素濃度は１１〜１
２ｖｏｌ％程度の範囲に維持するのが望ましく、この範
囲に酸素濃度を維持すべく、水蒸気供給量を調節する。
かかる酸素濃度を維持するために必要な、破砕機８内の
空気中における水蒸気の混入率は４３〜４８ｖｏｌ％程
度である。水蒸気の供給量の調節は、酸素濃度計５０、
５１により酸素濃度を検出し、この検出値に基づいて制
御弁７の開度を調節して蒸気発生装置１５からの送気量
を増減して行なう。
【００１６】酸素濃度計５０、５１はジルコニア式で空
気と水蒸気との混合気体の湿ベースの酸素濃度の測定が
可能である。破砕機８内の酸素濃度は酸素濃度計５０、
５１の検出値の如何にかかわらず、１３ｖｏｌ％を超え
ないようにするため、制御弁７の開度には下限値が設定
されている。１３ｖｏｌ％を維持するための水蒸気の混
入率は３８％ｖｏｌ程度であり、３８ｖｏｌ％程度を維
持するための水蒸気量が、この下限値となり、酸素濃度
計５０、５１の検出値が如何なる値を示しても、水蒸気
供給量がかかる値を下回るような制御弁７の開度となる
ことはない。より具体的に、水蒸気の混入率を４３〜４
８ｖｏｌ％程度に維持し、また、水蒸気の混入率が３８
ｖｏｌ％程度を下回らないようにするために必要な水蒸
気供給量は、破砕機８への上述の通風量や破砕機８の回
転数などが個々の破砕機により異なるため様々である。
なお、蒸気供給量は流量計６により知ることができる。
本実施例においては制御弁７の開度に下限値を設定した
が、制御弁７と並列に手動弁を設け、この手動弁に最小
開度を設定する構成としてもよい。
【００１７】酸素濃度計５０の酸素濃度検出位置は、破
砕機８内の酸素濃度を正確に検出するため、破砕機８の
直上部で、供給コンベア２側からの空気の漏れ込みによ
る影響を受けない位置としている。酸素濃度計５１の酸
素濃度検出位置は投入フード１８としている。これらの
位置には破砕物の飛散や粉塵の移動があるため、これら
によって、酸素濃度計５０、５１が影響を受けないよう
に、図示しないプロテクターやブロー設備が設けられて
いる。本実施例においては、酸素濃度計を２つ設けてい
るが、これは、酸素濃度が機内で局所的に高くなる場合
があるからである。酸素濃度計は、より酸素濃度の正確
な検出ができるように、３つ以上設置してもよいし、１
つのみの設置としてもよい。また、酸素濃度計の検出部
のみ複数個所として、変換器を共用する構成としてもよ
い。なお、複数の酸素濃度計の各検出濃度が一致しなか
った場合には、各検出濃度中最大の検出濃度を基準とし
て上述の調節を行なう。
【００１８】破砕機８を通過した蒸気混合気体は、供給
コンベア２の上部に設けた吸込口４から集塵装置１３に
送られ、粉塵などを除去した後に排風機１４により外部
に放出される。破砕機８入口側の供給コンベア２や、出
口側の排出コンベア１２には、ゴムカーテン３、１０が
設けられており、排風機１４の吸引力による破砕機８内
への空気漏れ込みを抑制するとともに、出口側、入口側
の両コンベア２、１２部を若干負圧にして粉塵の機外へ
の飛散を防止している。
【００１９】また、破砕機８内の空気と水蒸気との混合
気体の飽和温度は約８０℃であるため、温度計１７を設
けて機内の温度監視を行なう。特に運転起動後しばらく
は、機内が十分に加温されてからごみを投入するように
するためにも、機内温度の監視は必要である。なお、機
内の結露を防止するため、ごみ破砕設備本体、ダクトな
どは保温している。
【００２０】つづいて本実施例の作用について説明す
る。本実施例では、上述のように制御弁７の開度に下限
値が設定され、酸素濃度計５０、５１による酸素濃度検
出値の如何にかかわらず、酸素濃度が１３ｖｏｌ％程度
を超えることはない。したがって、酸素濃度計５０、５
１が、破砕機８内に可燃性ガスが存在することにより実
際の酸素濃度より下回る酸素濃度を検出したり、酸素濃
度計５０、５１が破砕物の飛散などで破損しあるいは測
定不能となり、酸素濃度の調節ができない事態となって
も、水蒸気量が許容限度を超えて不足することはなく、
従来の技術に比べて可燃性ガスの爆発の防止を十分に図
ることができる。
【００２１】
【発明の効果】以上説明した本発明によれば、従来の技
術に比べて可燃性ガスの爆発を十分に図ることができる
破砕機の爆発防止装置を提供することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing explosion of a crusher for supplying steam to prevent explosion of combustible gas in a crusher for waste. . [0002] Waste such as municipal waste is collected separately.
Collected coarse and non-combustible waste is crushed by a crusher, but during this crushing, impacts, shearing, and other forces are applied to non-combustible waste such as iron, generating sparks, and flammable gas mixed into the waste May explode. Therefore, due to security problems, it is necessary to take measures to prevent this explosion. [0003] Such a prevention technique is disclosed in
There is a technique disclosed in Japanese Patent No. 89849. This technology fills the rotary crusher with water vapor, nitrogen gas, carbon dioxide gas and the like, and makes the oxygen concentration in the crusher almost zero to prevent explosion of combustible gas. As a technique for preventing the explosion of combustible gas more economically than this technique, Japanese Patent Publication No. 2-334
Japanese Patent Publication No. 21 discloses a technique disclosed in Japanese Patent Laid-Open Publication No. 21-210. This measures the temperature inside the crusher, controls the amount of steam supplied to the crusher based on the measured value, and keeps the concentration of water vapor in each part of the crusher within a certain range, thereby reducing the oxygen concentration in the crusher. The explosion is prevented beforehand by maintaining the concentration within the range that can prevent the explosion. According to the technology disclosed in Japanese Patent Application Laid-Open No. 56-89849, the amount of steam used is extremely large and extremely uneconomical. However, according to the present technology, it is limited to a certain required amount. Is economical. However, this technique measures the temperature inside the crusher or the surface of the crusher and adjusts the amount of water vapor based on the detected temperature, and has the following problems.
That is, (1) Since the temperature rise inside the crusher also generates heat due to the crushing action, it can not be said that only the supplied steam is the factor that determines the temperature inside the crusher. (2) Even when the crusher is kept warm, a temperature gradient always occurs between the crusher and the outside air. For this reason, the surface temperature of the crusher does not reflect the temperature inside the crusher, and if the amount of steam is adjusted based on this temperature, it becomes impossible to adjust the amount of steam to an appropriate amount. (3) Changes in the temperature inside the crusher or at the surface of the crusher are relatively slow, and the adjustment of the amount of water vapor tends to be delayed. Therefore, it is difficult to adjust the amount of water vapor to an appropriate amount by the technique disclosed in Japanese Patent Publication No. 33421/1990. high. In order to sufficiently prevent the explosion of combustible gas by keeping the amount of water vapor adequate and to economically prevent the explosion, the oxygen concentration is directly detected instead of detecting the temperature. It is necessary to adjust the amount of water vapor based on the value. [0007] However, even if the oxygen concentration is detected and the amount of water vapor is adjusted based on the detected value, it is still insufficient for proper adjustment of the amount of water vapor. It is. That is, when a combustible gas is present in the crusher, even if the oxygen concentration is detected, it shows a value slightly lower than the actual oxygen concentration. Therefore, even if the amount of water vapor is adjusted based on the detected value of the oxygen concentration, the supply amount of water vapor may fall below the actual required amount beyond an allowable range.
In addition, the oxygen concentration detector may be damaged or become unmeasurable due to the scattering of the crushed material or the flow of dust, and the oxygen concentration may not be adjusted, which may cause an explosion of combustible gas. An object of the present invention is to solve such problems and to provide an apparatus for preventing explosion of a crusher capable of sufficiently preventing explosion of combustible gas as compared with the prior art. In order to solve the above-mentioned problems, the crushing method of the present invention
The explosion prevention device of the machine is based on an oxygen concentration detector that detects the oxygen concentration at one or more detection points inside or near the crusher that crushes waste, and based on the oxygen concentration detected value by this oxygen concentration detector A control valve for controlling the amount of steam supplied to the crusher, and the degree of opening of the control valve is such that the oxygen concentration exceeds 13 vol% irrespective of the oxygen concentration detection value.
It is characterized in that a lower limit is set so as not to exist. In the present invention, the lower limit of the water vapor supply amount is provided so that the water vapor supply amount does not fall below a predetermined value regardless of the detected oxygen concentration value.
Therefore, if an appropriate value that is considered to be the minimum necessary to prevent an explosion is used as the lower limit, the oxygen concentration detected by the oxygen concentration detector will be less than the actual oxygen concentration due to the presence of combustible gas in the crusher. Even if the oxygen concentration cannot be adjusted because the oxygen concentration is lower than the concentration or the oxygen concentration detector is broken due to scattering of crushed material or the like, the water vapor supply amount does not fall below the lower limit. Therefore, the amount of water vapor does not exceed the permissible limit and does not become insufficient, and it is possible to sufficiently prevent the explosion of the flammable gas as compared with the related art. [0011] The oxygen concentration is adjusted to 11 atmospheres in a crusher or the like.
It seems to be desirable to adjust to maintain about 12 vol%. Therefore, it is desirable that the control device of the present invention adjusts the amount of water vapor by increasing or decreasing the amount of water vapor so that the detected value of oxygen concentration by the oxygen concentration detector always becomes this value. Also,
In order to sufficiently prevent the explosion in the crusher, it is desirable that the oxygen concentration does not exceed about 13 vol%. However, even if the oxygen concentration actually exceeds 13 vol%, as described above, a lower oxygen concentration value may be shown as described above. Therefore, if the oxygen concentration does not become larger than about 13 vol%, The amount of water vapor considered to be necessary to maintain the oxygen concentration at about 13 vol% is set as the lower limit of the present invention, and the water supply amount should not be lower than this value regardless of the oxygen concentration detection value. . When the oxygen concentration is about 11 to 12 vol%, the steam supply amount corresponding to the oxygen concentration detection value is 43 to 43% by the mixing ratio of water vapor in the atmosphere in the crusher.
The steam supply amount, which is about 48 vol% and is the lower limit, is about 38 vol% in the same manner as the steam mixing rate. The more specific amount of steam supplied to the crusher varies because the amount of air flowing into the crusher varies depending on the individual crusher such as the model number and the number of revolutions of the crusher. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of a refuse crushing treatment facility provided with an explosion prevention device for a crusher according to one embodiment of the present invention. Reference numeral 1 denotes a receiving hopper, and refuse to be crushed is first put into the receiving hopper 1. The introduced refuse is sent to the rotary crusher 8 by the supply conveyor 2. After the refuse is crushed by the rotary crusher 8, the refuse is discharged from the refuse crushing processing equipment by the discharge conveyor 12, and is conveyed to the next step by the belt conveyor 16. The rotary crusher 8 is of a swing hammer type, rotates at high speed (900 rpm in a 60 Hz area).
m, 50 Hz in an area of 1000 rpm), which breaks up bulky or incombustible waste to a desired particle size. Crusher 8
Is provided with a rotor 82 having a hammer 81. When the rotor 82 rotates, air is sucked, and an air flow is generated from below to above the crusher 8 shown in the figure. The flow of air and the flow of dust are shown by arrows in FIG. The steam supplied to the crusher 8 is supplied from a blowing nozzle 9 provided at a lower portion of the crusher 8, mixed with the above-described rising air flow, passes through the cage bar 84, and flows into the crusher 8. . The oxygen concentration in the crusher 8 is 11 to 1
It is desirable to maintain it in the range of about 2 vol%, and the steam supply amount is adjusted to maintain the oxygen concentration in this range.
The mixing ratio of water vapor in the air in the crusher 8 required to maintain the oxygen concentration is about 43 to 48 vol%. The adjustment of the supply amount of water vapor is performed by the oxygen concentration meter 50,
The oxygen concentration is detected by 51, and the opening degree of the control valve 7 is adjusted based on the detected value to increase or decrease the amount of air supply from the steam generator 15. The oxygen concentration meters 50 and 51 are of a zirconia type and can measure the oxygen concentration of a mixed gas of air and water vapor on a wet basis. The oxygen concentration in the crusher 8 is measured by an oxygen concentration meter 50,
Regardless of the detection value of 51, the lower limit of the opening of the control valve 7 is set so as not to exceed 13% by volume. The mixing ratio of water vapor for maintaining 13 vol% is about 38% vol, and the amount of water vapor for maintaining about 38 vol% is the lower limit, and the detection values of the oxygen concentration meters 50 and 51 indicate any values. However, the opening of the control valve 7 does not become such that the steam supply amount falls below such a value. More specifically, the mixing ratio of water vapor is 43 to 4
8 vol%, and the mixing ratio of water vapor is 38
The amount of steam supply necessary to keep the volume of the crusher 8 from falling below about vol% is various because the above-mentioned ventilation volume to the crusher 8 and the number of revolutions of the crusher 8 vary depending on each crusher.
In addition, the steam supply amount can be known from the flow meter 6.
In the present embodiment, the lower limit is set for the opening of the control valve 7, but a manual valve may be provided in parallel with the control valve 7, and the minimum opening may be set for this manual valve. In order to accurately detect the oxygen concentration in the crusher 8, the oxygen concentration detection position of the oximeter 50 is affected by air leakage from the supply conveyor 2 right above the crusher 8. There is no position. The oxygen concentration detecting position of the oxygen concentration meter 51 is the charging hood 18. At these positions, crushed materials are scattered or dust is moved. Therefore, protectors and blow equipment (not shown) are provided so that the oxygen concentration meters 50 and 51 are not affected by these. In the present embodiment, two oxygen concentration meters are provided, because the oxygen concentration may locally increase in the machine. Three or more oximeters may be installed so that more accurate oxygen concentration can be detected.
Only one may be installed. Further, a configuration may be adopted in which only the detection unit of the oximeter is provided at a plurality of locations and the converter is shared. If the detected concentrations of the plurality of oximeters do not match, the above adjustment is performed based on the maximum detected concentration among the detected concentrations. The steam mixed gas that has passed through the crusher 8 is sent to the dust collecting device 13 from the suction port 4 provided at the upper part of the supply conveyor 2 and is discharged to the outside by the exhaust fan 14 after removing dust and the like. Rubber curtains 3 and 10 are provided on the supply conveyor 2 on the inlet side of the crusher 8 and the discharge conveyor 12 on the outlet side, and suppress air leakage into the crusher 8 due to the suction force of the blower 14. At the same time, the conveyors 2 and 12 on the outlet side and the inlet side are slightly negatively pressured to prevent dust from scattering outside the machine. Since the saturation temperature of the gas mixture of air and steam in the crusher 8 is about 80 ° C., a thermometer 17 is provided to monitor the temperature inside the machine. In particular, for a while after the start of the operation, it is necessary to monitor the temperature inside the machine so that the inside of the machine is sufficiently heated before the refuse is charged. In order to prevent dew condensation inside the machine, the refuse crushing equipment main body, ducts, etc. are kept warm. Next, the operation of the present embodiment will be described. In the present embodiment, the lower limit is set for the opening degree of the control valve 7 as described above, and the oxygen concentration does not exceed about 13 vol% regardless of the oxygen concentration detection values by the oxygen concentration meters 50 and 51. . Therefore, the oximeters 50, 5
1 detects an oxygen concentration lower than the actual oxygen concentration due to the presence of flammable gas in the crusher 8, or the oximeters 50 and 51 are damaged or become unmeasurable due to scattering of crushed material. Even if it becomes impossible to adjust the concentration, the amount of water vapor does not exceed the allowable limit and does not run short.
It is possible to sufficiently prevent the explosion of combustible gas as compared with the related art. According to the present invention described above, it is possible to provide an apparatus for preventing explosion of a crusher, which can sufficiently explode a combustible gas as compared with the prior art.
【図面の簡単な説明】
【図１】本発明の一実施例である破砕機の爆発防止装置
を設けたごみ破砕処理設備の系統図である。
【符号の説明】
５０、５１ 酸素濃度計
７ 制御弁
８ 回転破砕機
９ 吹込ノズル
１５ 蒸気発生装置BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system diagram of a waste crushing treatment facility provided with an explosion prevention device of a crusher according to one embodiment of the present invention. [Description of Signs] 50, 51 Oxygen Analyzer 7 Control Valve 8 Rotary Crusher 9 Blow Nozzle 15 Steam Generator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 上妻 政敏 東京都中央区築地５丁目６番４号 三井 造船株式会社内 (56)参考文献 特開 昭60−94154（ＪＰ，Ａ) 特開 平３−144400（ＪＰ，Ａ) 特開 昭59−130544（ＪＰ，Ａ) 特開 昭56−89849（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B02C 13/00 - 13/31 B02C 18/00 - 25/00 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatoshi Kamizuma 5-6-4 Tsukiji, Chuo-ku, Tokyo Mitsui Engineering & Shipbuilding Co., Ltd. (56) References JP-A-60-94154 (JP, A) 3-144400 (JP, A) JP-A-59-130544 (JP, A) JP-A-56-89849 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B02C 13/00 -13/31 B02C 18/00-25/00
Claims (1)
近傍の１又は複数の検出点で酸素濃度を検出する酸素濃
度検出器と、この酸素濃度検出器による酸素濃度検出値
に基づき前記破砕機に供給する水蒸気量を制御する制御
弁とを備え、この制御弁の開度は前記酸素濃度検出値の
如何にかかわらず酸素濃度が１３ｖｏｌ％を超えないよ
うに下限値が設定されていることを特徴とする破砕機の
爆発防止装置。(57) [Claims] 1. An oxygen concentration detector for detecting oxygen concentration at one or a plurality of detection points inside or near a crusher for crushing waste, and the oxygen concentration detector the oxygen concentration based on the detection value control for controlling the amount of steam supplied to the crusher by
And a valve, the oxygen concentration regardless of the opening degree is the oxygen concentration value detected by the control valve does not exceed 13 vol%
An explosion-prevention device for a crusher , wherein a lower limit is set .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25995493A JP3377263B2 (en) | 1993-10-18 | 1993-10-18 | Crusher explosion prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25995493A JP3377263B2 (en) | 1993-10-18 | 1993-10-18 | Crusher explosion prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07112140A JPH07112140A (en) | 1995-05-02 |
| JP3377263B2 true JP3377263B2 (en) | 2003-02-17 |
Family
ID=17341231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25995493A Expired - Fee Related JP3377263B2 (en) | 1993-10-18 | 1993-10-18 | Crusher explosion prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3377263B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5385851B2 (en) * | 2010-05-17 | 2014-01-08 | 株式会社神戸製鋼所 | Crusher ignition prevention method and ignition prevention device |
-
1993
- 1993-10-18 JP JP25995493A patent/JP3377263B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07112140A (en) | 1995-05-02 |
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