JP2007218475A

JP2007218475A - Decompressed steam heating device

Info

Publication number: JP2007218475A
Application number: JP2006037975A
Authority: JP
Inventors: Takayuki Morii; 高之森井; Kenichi Watanabe; 渡辺　　賢一; Tadaaki Kumamoto; 匡章隈元
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2006-02-15
Filing date: 2006-02-15
Publication date: 2007-08-30

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decompressed steam heating device free from attachment and accumulation of foreign matters on a valve means by surely capturing the foreign matters in fluid at an inlet side of the valve means. <P>SOLUTION: A steam supply pipe 3 is connected with a jacket portion 11 of a reaction furnace 1. A steam pressure control valve 7 and a gas liquid separator 4 are mounted on the steam supply pipe 3. A fluid supply pipe 6 is connected between the steam pressure control valve 7 and the gas liquid separator 4. A strainer 18 and the valve means 19 are successively disposed in the fluid supply pipe 6. An automatic opening/closing valve 26 is connected with a blow passage 17 of the strainer 18. The superheated steam supplied from the steam supply pipe 3 to the jacket portion 11 is cooled to a prescribed temperature by cooling fluid supplied from the fluid supply pipe 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、熱交換器内の被加熱物を低圧蒸気で加熱するものに関し、特にその加熱蒸気温度が１００度Ｃ程度の比較的低温の場合に適した減圧蒸気加熱装置に関する。 The present invention relates to an apparatus for heating an object to be heated in a heat exchanger with low-pressure steam, and more particularly to a reduced-pressure steam heating apparatus suitable for a case where the heating steam temperature is a relatively low temperature of about 100 degrees C.

従来の減圧蒸気加熱装置は、熱交換器と、この熱交換器に加熱用の蒸気を供給する蒸気供給管と、熱交換器内の流体を吸引する吸引手段を接続し、蒸気供給管に流体供給管と弁手段とを接続して、この流体供給管からの流体によって加熱用蒸気の過熱度を調節することができると共に、弁手段と吸引手段とを連通することによって、弁手段に付着堆積した異物を、吸引手段の吸引力で吸引し除去することができるものである。 A conventional reduced pressure steam heating apparatus is connected to a heat exchanger, a steam supply pipe for supplying steam for heating to the heat exchanger, and a suction means for sucking a fluid in the heat exchanger, and a fluid is connected to the steam supply pipe. By connecting the supply pipe and the valve means, the degree of superheat of the steam for heating can be adjusted by the fluid from the fluid supply pipe, and the valve means and the suction means are connected to each other so as to adhere to the valve means. This foreign matter can be sucked and removed by the suction force of the suction means.

上記従来の減圧蒸気加熱装置では、吸引手段の吸引力でもって、弁手段に付着堆積した異物を除去するものであるが、吸引手段の吸引力だけでは弁手段に付着堆積した異物を確実に除去することができない問題があった。
特開平１１−３１９５４４号公報 In the above conventional vacuum steam heating apparatus, the foreign matter adhering to and deposited on the valve means is removed by the suction force of the suction means, but the foreign matter attached to and deposited on the valve means is surely removed only by the suction force of the suction means. There was a problem that could not be done.
JP 11-319544 A

解決しようとする課題は、弁手段へ異物が到達できないように、弁手段の入口側で異物を確実に捕捉することによって、弁手段での異物の付着堆積を生じない減圧蒸気加熱装置を得ることである。 The problem to be solved is to obtain a reduced-pressure steam heating device that does not cause foreign matter adhesion and accumulation on the valve means by reliably capturing the foreign matter on the inlet side of the valve means so that the foreign matter cannot reach the valve means. It is.

本発明は、熱交換器と、当該熱交換器に加熱用の蒸気を供給する蒸気供給管と、熱交換器内の流体を吸引する吸引手段を接続し、蒸気供給管に流体供給管と弁手段とを接続して、当該流体供給管からの流体によって加熱用蒸気の過熱度を調節するものにおいて、流体供給管の弁手段の入口側に流体中の異物を漉し取るストレーナを配置して、当該ストレーナのブロー通路に自動開閉弁を接続して、当該自動開閉弁を開弁することによって、ストレーナ内部をブローして清浄化するものである。 The present invention connects a heat exchanger, a steam supply pipe for supplying heating steam to the heat exchanger, and a suction means for sucking fluid in the heat exchanger, and the fluid supply pipe and valve are connected to the steam supply pipe. In the one that adjusts the superheat degree of the steam for heating by the fluid from the fluid supply pipe, a strainer that scavenges foreign matters in the fluid is disposed on the inlet side of the valve means of the fluid supply pipe, By connecting an automatic open / close valve to the blow passage of the strainer and opening the automatic open / close valve, the inside of the strainer is blown and cleaned.

本発明は、流体供給管の弁手段の入口側に、流体中の異物を漉し取るストレーナを配置したことによって、流体供給管内を弁手段側へ流下する流体中の異物がこのストレーナにより漉し取られ、弁手段内へ異物が流入することがない。 In the present invention, a strainer for scavenging foreign matter in the fluid is arranged on the inlet side of the valve means of the fluid supply pipe, so that the foreign matter in the fluid flowing down to the valve means side in the fluid supply pipe is scavenged by this strainer. No foreign matter flows into the valve means.

本発明は、流体中の異物を漉し取るストレーナを用いるものであるが、ストレーナは例えば、ステンレス製薄板に小径孔を多数貫通した漉し板と、６０ないし１２０メッシュ程度の同じくステンレス製の網の目を有する漉し網とを重ね合わせたスクリーン部材を有する従来公知のものを用いることができる。 The present invention uses a strainer that scrubs out foreign substances in the fluid. For example, the strainer has a mesh plate made of a thin stainless steel plate with many small-diameter holes, and a mesh made of stainless steel of about 60 to 120 mesh. A conventionally well-known thing which has the screen member which piled up the sash net | network which has can be used.

図１において、熱交換器としての反応釜１と吸引手段２と加熱用蒸気供給管３と気液分離器４、及び、蒸気供給管３に連通して過熱蒸気を飽和温度蒸気まで減温する流体供給管６とで減圧蒸気加熱装置を構成する。 In FIG. 1, a superheated steam is reduced to a saturated temperature steam by communicating with a reaction vessel 1 as a heat exchanger, a suction means 2, a heating steam supply pipe 3, a gas-liquid separator 4, and a steam supply pipe 3. The fluid supply pipe 6 constitutes a vacuum steam heating device.

蒸気供給管３は図示しないボイラー等の蒸気源と接続すると共に、蒸気圧力調節弁７と開閉弁８を取り付け、流体供給管６を接続し、更に気液分離器４を取り付けて、熱交換器としての反応釜１のジャケット部１１と接続する。 The steam supply pipe 3 is connected to a steam source such as a boiler (not shown), a steam pressure control valve 7 and an on-off valve 8 are attached, a fluid supply pipe 6 is connected, and a gas-liquid separator 4 is further attached to the heat exchanger. It connects with the jacket part 11 of the reaction kettle 1 as follows.

反応釜１のジャケット部１１の下端を、蒸気トラップ１２とバルブ１３を介して吸引手段２のエゼクタ１４と接続する。
吸引手段２は、エゼクタ１４とタンク５と循環ポンプ１５に循環路１６を介して接続した組み合わせポンプとして構成する。エゼクタ１４はタンク５内の流体を循環ポンプ１５で循環して通過させることにより、その流体温度に応じた吸引力を生じるものである。 The lower end of the jacket portion 11 of the reaction kettle 1 is connected to the ejector 14 of the suction means 2 through a steam trap 12 and a valve 13.
The suction means 2 is configured as a combination pump connected to the ejector 14, the tank 5, and the circulation pump 15 via the circulation path 16. The ejector 14 causes the fluid in the tank 5 to circulate and pass through the circulation pump 15, thereby generating a suction force according to the fluid temperature.

循管路１６を分岐して、余剰流体排出管９と流体供給管６を連通する。余剰流体排出管９には開閉弁１０を取り付けて、図示しないタンク５内のレベル計と連動してタンク５内の液位を所定レベルに維持する。 The circulation path 16 is branched to connect the surplus fluid discharge pipe 9 and the fluid supply pipe 6. An open / close valve 10 is attached to the surplus fluid discharge pipe 9 to maintain the liquid level in the tank 5 at a predetermined level in conjunction with a level meter in the tank 5 (not shown).

流体供給管６は、組み合わせポンプ２の循環流体の一部を蒸気供給管３の上部から矢印方向に供給するものであり、途中にストレーナ１８と弁手段１９とを取り付ける。ストレーナ１８は、一般的にＹ型ストレーナと呼ばれているもので、内部に円筒状の漉し板と漉し網からなるスクリーン部材を有しており、このスクリーン部材を流体が流下することによって、流体中に混入していた錆やスケール等の異物を漉し取ることができ、異物の漉し取られた流体だけが弁手段１９側へ流下することができるものである。 The fluid supply pipe 6 supplies a part of the circulating fluid of the combination pump 2 from the upper part of the steam supply pipe 3 in the direction of the arrow, and a strainer 18 and a valve means 19 are attached on the way. The strainer 18 is generally called a Y-type strainer, and has a screen member composed of a cylindrical stencil plate and a screen mesh inside, and fluid flows down the screen member, Foreign matter such as rust and scale mixed in can be removed, and only the fluid from which the foreign matter has been removed can flow down to the valve means 19 side.

ストレーナ１８のブロー通路１７に自動開閉弁２６を接続する。ブロー通路１７は、ストレーナ１８の入口側と連通しており、スクリーン部材で漉し取られてスクリーン部材内壁に付着している異物をこのブロー通路１７から外部へ排除することができる。従って、自動開閉弁２６を開弁することによって、ストレーナ１８へ流入した流体はスクリーン部材に付着している異物をブローしてブロー通路１７と自動開閉弁２６から系外へ排除される。 An automatic opening / closing valve 26 is connected to the blow passage 17 of the strainer 18. The blow passage 17 communicates with the inlet side of the strainer 18, and foreign matter that has been scraped off by the screen member and attached to the inner wall of the screen member can be removed from the blow passage 17 to the outside. Therefore, by opening the automatic opening / closing valve 26, the fluid flowing into the strainer 18 blows foreign matter adhering to the screen member and is removed from the system from the blow passage 17 and the automatic opening / closing valve 26.

本実施例においては、自動開閉弁２６の出口側を系外へ連通する例を示したが、自動開閉弁２６の出口側を、吸引手段２のタンク５と接続することによって、吸引手段２を循環する循環流体の減少を防止することができる。 In the present embodiment, the example in which the outlet side of the automatic opening / closing valve 26 communicates with the outside of the system is shown. However, the suction means 2 is connected by connecting the outlet side of the automatic opening / closing valve 26 to the tank 5 of the suction means 2. Reduction of circulating fluid can be prevented.

弁手段１９は、その開度を調節して通過流量をコントロールすることのできるもので、ニードル弁や玉形弁等の手動弁の他、電動モーターや圧縮空気式ダイヤフラム等のアクチュエータを設けた自動弁を用いることもできる。 The valve means 19 is capable of controlling the flow rate by adjusting the opening degree thereof. In addition to a manual valve such as a needle valve or a ball valve, an automatic motor provided with an actuator such as an electric motor or a compressed air diaphragm is provided. A valve can also be used.

本実施例においては流体供給管６を、吸引手段２の循環流体の一部を分岐して供給するものとして示したが、流体供給管６の流体は、循環流体に限る必要はなく、別途の温度の冷却流体を用いることもできる。 In the present embodiment, the fluid supply pipe 6 is shown as a part of the circulating fluid of the suction means 2 that is branched and supplied. However, the fluid in the fluid supply pipe 6 is not limited to the circulating fluid, and is separately provided. A temperature cooling fluid can also be used.

流体供給管６と反応釜１のジャケット部１１の間に気液分離器４を配置する。気液分離器４は、従来から用いられている型式のもので良く、遠心力を利用したものや衝突板に衝突させるもの、あるいは、フィルターを用いたもの等適宜用いることができるる。気液分離器４の下部に蒸気トラップ２５を取り付け、管２４を介してエゼクタ１４と連通する。蒸気トラップ２５は、蒸気は通過させることがなく、液体としての復水だけを流下させる自動弁の一種であり、気液分離器４で分離された液体としての復水を排出するものである。なお、吸引手段２のタンク５の上部には冷却流体補給管２１を接続する。 The gas-liquid separator 4 is disposed between the fluid supply pipe 6 and the jacket portion 11 of the reaction kettle 1. The gas-liquid separator 4 may be of a conventionally used type, and can be appropriately used such as one using centrifugal force, one that collides against a collision plate, one that uses a filter, or the like. A vapor trap 25 is attached to the lower part of the gas-liquid separator 4 and communicates with the ejector 14 via a pipe 24. The steam trap 25 is a kind of automatic valve that allows only steam to flow down without passing steam, and discharges the condensate as liquid separated by the gas-liquid separator 4. A cooling fluid supply pipe 21 is connected to the upper part of the tank 5 of the suction means 2.

反応釜１内の図示しない被加熱物を加熱する場合、蒸気供給管３から加熱用の蒸気をジャケット部１１に供給すると共に、循環ポンプ１５を駆動してエゼクタ１４で吸引力を発生させる。 When heating an object (not shown) in the reaction kettle 1, heating steam is supplied from the steam supply pipe 3 to the jacket portion 11, and the circulation pump 15 is driven to generate a suction force by the ejector 14.

この場合、加熱用の蒸気は蒸気圧力調節弁７で所定の圧力まで減圧されるが、圧力が減圧されても保有している熱量はほとんど減少することが無いために、減圧蒸気は過熱蒸気となる。しかしながら、流体供給管６から循環流体の一部が過熱蒸気中に供給されることによって、気液分離器４を流下する間までに過熱蒸気は飽和温度蒸気まで減温される。流体供給管６から供給される流体の量は、弁手段１９の開度を適宜調整することにより、制御することができる。 In this case, the steam for heating is depressurized to a predetermined pressure by the steam pressure control valve 7, but even if the pressure is depressurized, the amount of heat possessed hardly decreases, so that the depressurized steam is superheated steam. Become. However, by supplying a part of the circulating fluid from the fluid supply pipe 6 into the superheated steam, the temperature of the superheated steam is reduced to the saturation temperature steam before flowing down the gas-liquid separator 4. The amount of fluid supplied from the fluid supply pipe 6 can be controlled by appropriately adjusting the opening degree of the valve means 19.

気液分離器４で循環流体と蒸気の混合流体はそれぞれ気液分離され、飽和温度となった蒸気はジャケット部１１に供給されて反応釜１内の被過熱物を加熱すると共に、分離された液体即ち復水は蒸気トラップ２５を通ってエゼクタ１４に吸引されタンク５に至る。 In the gas-liquid separator 4, the mixed fluid of the circulating fluid and the steam is separated into gas and liquid, and the steam having reached the saturation temperature is supplied to the jacket portion 11 to heat the superheated material in the reaction vessel 1 and separated. The liquid or condensate is sucked into the ejector 14 through the vapor trap 25 and reaches the tank 5.

弁手段１９の入口側にストレーナ１８を配置したことによって、流体供給管６から弁手段１９へ流下する流体中の錆やスケール等の異物が、このストレーナ１８で漉し取られ、従って、弁手段１９内へ異物が流入することはない。 By disposing the strainer 18 on the inlet side of the valve means 19, foreign matter such as rust and scale in the fluid flowing down from the fluid supply pipe 6 to the valve means 19 is scavenged by the strainer 18. Foreign matter does not flow into the inside.

本発明に係る減圧蒸気加熱装置の実施例を示す構成図。The block diagram which shows the Example of the pressure reduction steam heating apparatus which concerns on this invention.

符号の説明Explanation of symbols

１反応釜
２吸引手段
３蒸気供給管
４気液分離器
５タンク
６流体供給管
１１ジャケット部
１４エゼクタ
１５循環ポンプ
１７ブロー通路
１８ストレーナ
１９弁手段
２６自動開閉弁 DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Suction means 3 Steam supply pipe 4 Gas-liquid separator 5 Tank 6 Fluid supply pipe 11 Jacket part 14 Ejector 15 Circulation pump 17 Blow passage 18 Strainer 19 Valve means 26 Automatic on-off valve

Claims

熱交換器と、当該熱交換器に加熱用の蒸気を供給する蒸気供給管と、熱交換器内の流体を吸引する吸引手段を接続し、蒸気供給管に流体供給管と弁手段とを接続して、当該流体供給管からの流体によって加熱用蒸気の過熱度を調節するものにおいて、流体供給管の弁手段の入口側に流体中の異物を漉し取るストレーナを配置して、当該ストレーナのブロー通路に自動開閉弁を接続して、当該自動開閉弁を開弁することによって、ストレーナ内部をブローして清浄化することを特徴とする減圧蒸気加熱装置。
A heat exchanger, a steam supply pipe for supplying steam for heating to the heat exchanger, and a suction means for sucking the fluid in the heat exchanger are connected, and the fluid supply pipe and the valve means are connected to the steam supply pipe Then, in the case of adjusting the superheat degree of the heating steam by the fluid from the fluid supply pipe, a strainer for scrubbing foreign matter in the fluid is arranged on the inlet side of the valve means of the fluid supply pipe, and the strainer blows. A reduced-pressure steam heating apparatus, wherein an internal on-off valve is connected to a passage and the inside of the strainer is blown and cleaned by opening the on-off valve.