JP3151794U - Multi-tube heat exchanger - Google Patents

Multi-tube heat exchanger Download PDF

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JP3151794U
JP3151794U JP2009001544U JP2009001544U JP3151794U JP 3151794 U JP3151794 U JP 3151794U JP 2009001544 U JP2009001544 U JP 2009001544U JP 2009001544 U JP2009001544 U JP 2009001544U JP 3151794 U JP3151794 U JP 3151794U
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heated gas
heat transfer
tube
heat
temperature
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篤史 山下
篤史 山下
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株式会社サンワマシナリー
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Abstract

【課題】タール等の異物が配管にて凝固することを防止し、また、例えタール等が配管内で凝固したとしても配管を取り外すことなくタール等を除去することを可能とする多管式熱交換装置を提供する。【解決手段】内部に被加熱気体11を流通させる胴部7と、該胴部7内に配置され内部に加熱気体5を流通させる複数の伝熱管とを備える多管式熱交換装置1において、該伝熱管から排出される加熱気体5の温度を検知する排気温度測定手段14と、該排気温度測定手段14より検知される加熱気体5の温度に応じて該伝熱管に流入する被加熱気体11の流量を制御する吸気流量制御手段15と伝熱管の流入口付近において不燃気体を噴射するための噴射手段18とを設ける。【選択図】図1A multi-tube heat that prevents foreign matters such as tar from solidifying in a pipe and enables tar to be removed without removing the pipe even if the tar or the like solidifies in the pipe. Provide exchange equipment. In a multi-tube heat exchange device (1) comprising a body part (7) through which a heated gas (11) is circulated, and a plurality of heat transfer tubes (2) disposed inside the body part (7) and through which a heated gas (5) is circulated. Exhaust temperature measuring means 14 for detecting the temperature of the heated gas 5 discharged from the heat transfer tube, and the heated gas 11 flowing into the heat transfer tube according to the temperature of the heated gas 5 detected by the exhaust temperature measuring means 14 An intake flow rate control means 15 for controlling the flow rate of the heat transfer pipe and an injection means 18 for injecting incombustible gas in the vicinity of the inlet of the heat transfer tube are provided. [Selection] Figure 1

Description

本考案は、ボイラ、空気加熱器、温水発生器、乾燥機、オーブン、ヒートセッタ等の熱発生装置から排出される排気ガスの排熱を回収して、再利用する廃熱回収装置に関するものである。  The present invention relates to a waste heat recovery device that recovers and reuses exhaust heat of exhaust gas discharged from a heat generation device such as a boiler, an air heater, a hot water generator, a dryer, an oven, and a heat setter. .

従来より、加熱気体と被加熱気体との温度差を利用し、高温側から低温側への熱交換を行うことによって加熱気体の持つ熱エネルギーを回収する廃熱回収装置としては、多管式熱交換装置が広く用いられている。  Conventionally, as a waste heat recovery device that recovers the thermal energy of a heated gas by performing heat exchange from a high temperature side to a low temperature side using a temperature difference between a heated gas and a heated gas, a multi-tube heat is used. Exchange devices are widely used.

この多管式熱交換装置には、例えば外部からの低温の気体が流れるダクト内に、熱発生装置からの高温の気体が流通する小径の伝熱管が多数並設されたものがある。この構成によると、外部から流入する被加熱気体が熱発生装置からの加熱気体の熱により高熱化し、該高熱化された被加熱気体を熱発生装置等に送風すれば、熱発生装置に要するエネルギーを削減することができる。  In this multi-tube heat exchange device, for example, there are some in which a large number of small-diameter heat transfer tubes through which high-temperature gas from a heat generation device flows are arranged in parallel in a duct through which low-temperature gas from the outside flows. According to this configuration, if the heated gas flowing from the outside is heated by the heat of the heated gas from the heat generator, and the heated gas is blown to the heat generator or the like, the energy required for the heat generator Can be reduced.

特開2002−364992号 公報  Japanese Patent Laid-Open No. 2002-364992

他方、熱発生装置から送風される加熱気体は、被加熱気体に熱を与えることによりその温度は低下する。そして、上記多管式熱交換装置をタール成分等を含む加熱気体を排出する熱発生装置に用いた場合、加熱気体の温度が被加熱気体により一定値以下にまで低下すると、加熱気体中のタール成分等が配管にて凝固し、伝熱管を塞いでしまう場合がある。この場合、多管式熱交換装置の熱回収効率は、著しく低下する。  On the other hand, the temperature of the heated gas blown from the heat generator is lowered by applying heat to the heated gas. And when the above-mentioned multi-tubular heat exchange device is used for a heat generating device that discharges a heated gas containing tar components and the like, when the temperature of the heated gas is lowered to a certain value or less by the heated gas, the tar in the heated gas Ingredients or the like may solidify in the piping and block the heat transfer tube. In this case, the heat recovery efficiency of the multitubular heat exchange device is significantly reduced.

そのため、上記多管式熱交換装置においては、定期的に配管を取り外して洗浄するというメンテナンスが多く行われていれるが、加熱気体にタール成分等が多く含まれている場合、かなりの頻度でメンテナンスを行わなければならず、費用と時間を徒に消費するという問題があった。  For this reason, in the above multi-tube heat exchange device, maintenance is often performed by periodically removing and cleaning the piping. However, if the heating gas contains a large amount of tar components, maintenance is performed with considerable frequency. There was a problem of consuming money and time.

また、タール成分等自体が微量であっても、多管式熱交換装置が大型のものである場合、例えメンテナンスの頻度が少なくとも、1回あたりのメンテナンスに多大な費用と時間を要するという問題があった。  Moreover, even if the tar component itself is in a very small amount, if the multi-tubular heat exchange device is a large one, for example, there is a problem that the maintenance frequency requires at least a large expense and time for one maintenance. there were.

そこで、本考案は、多管式熱交換装置において、タール成分等が配管にて凝固することを防止し、また、例えタール成分等が配管内で凝固したとしても配管を取り外すことなくタール等の異物を除去することを可能とすることにより、メンテナンスに要する費用と時間を削減することを目的とする。  Therefore, the present invention prevents the tar component from solidifying in the pipe in the multi-tube heat exchanger, and even if the tar component solidifies in the pipe, the tar or the like can be removed without removing the pipe. The object is to reduce the cost and time required for maintenance by making it possible to remove foreign substances.

本考案は上記目的を達成するために、以下の技術的手段を採用する。  In order to achieve the above object, the present invention employs the following technical means.

請求項1に記載の考案では、内部に被加熱気体を流通させる胴部と、該胴部内に配置され内部に加熱気体を流通させる複数の伝熱管とを備える多管式熱交換装置において、該伝熱管から排出される加熱気体の温度を検知する排気温度測定手段と、該測定手段より検知される加熱気体の温度に応じて該胴部に流入する被加熱気体の流量を制御する吸気流量制御手段とを備えていることを特徴としている。  In the invention according to claim 1, in a multi-tube heat exchange device comprising: a body portion that circulates a gas to be heated inside; and a plurality of heat transfer tubes that are arranged inside the body portion and circulate the heating gas therein. Exhaust temperature measuring means for detecting the temperature of the heated gas discharged from the heat transfer tube, and intake air flow rate control for controlling the flow rate of the heated gas flowing into the body according to the temperature of the heated gas detected by the measuring means And a means.

上記構成によると、排気温度測定手段において伝熱管内を流通する加熱気体の温度が一定値にまで低下したことを感知した場合、吸気流量制御手段が被加熱気体の流量を制御するので、タール成分等を凝固させぬよう一定値以上に加熱気体の温度を維持することができる。  According to the above configuration, when it is detected in the exhaust temperature measuring means that the temperature of the heated gas flowing through the heat transfer tube has decreased to a certain value, the intake flow rate control means controls the flow rate of the heated gas, so that the tar component The temperature of the heated gas can be maintained above a certain value so as not to coagulate etc.

請求項2に記載の考案では、請求項1に記載の構成に加え、伝熱管の流入口付近において不燃流体を噴射するための噴射手段を備えていることを特徴としている。  The invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, an injection means for injecting a non-combustible fluid in the vicinity of the inlet of the heat transfer tube is provided.

請求項2に記載の構成によると、伝熱管内により凝固しやすいタール成分等が含まれている場合であっても、不燃流体によりタール等の異物が溶解されながら管外に流出されるため、さらに好適である。なお、仮に請求項1記載の構成によらない通常の多管式熱交換装置において加熱気体に不燃流体を噴射すると、伝熱管内部の加熱気体の温度が低下し過ぎ、却ってタール成分等の凝固を招きやすくなるという弊害が生じるが、請求項2記載の構成によれば、伝熱管から排出される加熱気体の温度に応じて胴部に流入される被加熱気体の流量が制御され、伝熱管内部の加熱気体の温度が低下し過ぎることが防止されるため、そのような弊害は生じない。  According to the configuration of claim 2, even when a tar component that is easily solidified in the heat transfer tube is included, foreign matters such as tar are discharged out of the tube while being dissolved by the non-combustible fluid. Further preferred. In addition, if a non-combustible fluid is injected into a heated gas in a normal multi-tube heat exchange device that is not based on the configuration of claim 1, the temperature of the heated gas inside the heat transfer tube is excessively lowered, and on the contrary, the tar components and the like are solidified. However, according to the configuration of claim 2, the flow rate of the heated gas flowing into the body portion is controlled according to the temperature of the heated gas discharged from the heat transfer tube, and the heat transfer tube interior Such an adverse effect does not occur because the temperature of the heated gas is prevented from excessively decreasing.

本実施形態における多管式熱交換装置の側面図である。It is a side view of the multi-tube heat exchange apparatus in this embodiment. 本実施形態における多管式熱交換装置の胴部の断面図である。It is sectional drawing of the trunk | drum of the multi-tube heat exchange apparatus in this embodiment.

以下、図1及び図2に従って一実施例を説明する。  Hereinafter, an embodiment will be described with reference to FIGS.

本実施形態における多管式熱交換装置1においては、その付近に排気ファン2が取り付けられており、排気ファン2は、ボイラ、空気加熱器、温水発生器、ヒートセッタ等の熱発生装置3の排気口4から排出される加熱気体5を加熱気体流入口6に送風する。  In the multi-tube heat exchange device 1 in the present embodiment, an exhaust fan 2 is attached in the vicinity thereof, and the exhaust fan 2 is an exhaust of the heat generator 3 such as a boiler, an air heater, a hot water generator, a heat setter, or the like. The heated gas 5 discharged from the port 4 is blown to the heated gas inlet 6.

加熱気体流入口6の一辺は、胴部7と連結している。胴部7は、図2に図示するとおり、複数の伝熱管8を備えており、加熱気体5は、この伝熱管8を流通し、排気口9を経由して、外部に排出される。  One side of the heated gas inlet 6 is connected to the body 7. As shown in FIG. 2, the body portion 7 includes a plurality of heat transfer tubes 8, and the heated gas 5 flows through the heat transfer tubes 8 and is discharged to the outside via the exhaust port 9.

また、胴部7の付近には、フレッシュエア吸入ファン10が設置されている。フレッシュエア吸入ファン10は、胴部7のうち伝熱管8以外の部分と連結しており、外部から被加熱気体11を取り込み、被加熱気体11を胴部7のうち伝熱管8以外の部分に送風する。  In addition, a fresh air suction fan 10 is installed in the vicinity of the trunk portion 7. The fresh air suction fan 10 is connected to a portion other than the heat transfer tube 8 in the body portion 7, takes in the heated gas 11 from the outside, and puts the heated gas 11 into a portion other than the heat transfer tube 8 in the body portion 7. Blow.

被加熱気体11は、胴部7のうち伝熱管8以外を流通し、加熱気体5により高熱化された伝熱管8の熱により加熱され、フレッシュエア出口12に排出される。フレッシュエア出口12は送風管13により熱発生装置3等と連結しているため、排出された被加熱気体11は、熱発生装置3等に送風される。  The heated gas 11 circulates other than the heat transfer tube 8 in the body portion 7, is heated by the heat of the heat transfer tube 8 heated to high temperature by the heated gas 5, and is discharged to the fresh air outlet 12. Since the fresh air outlet 12 is connected to the heat generating device 3 and the like by the blower tube 13, the discharged heated gas 11 is blown to the heat generating device 3 and the like.

胴部7の排気口9付近には、排気温度計14が設置されている。排気温度計14は、排気口9付近の加熱気体5の温度を検出し、検出した加熱気体5の温度をデータ化して、制御盤15に送信する。  An exhaust thermometer 14 is installed in the vicinity of the exhaust port 9 of the trunk portion 7. The exhaust thermometer 14 detects the temperature of the heated gas 5 near the exhaust port 9, converts the detected temperature of the heated gas 5 into data, and transmits the data to the control panel 15.

フレッシュエア吸入ファン10のファンの回転数は、制御盤15により、排気温度計14にて検出された加熱気体5の温度に応じて制御され、胴部7に送風される被加熱気体11の風量は、伝熱管8内のタール等が凝固せぬよう調節される。  The rotational speed of the fan of the fresh air suction fan 10 is controlled by the control panel 15 according to the temperature of the heated gas 5 detected by the exhaust thermometer 14, and the air volume of the heated gas 11 blown to the trunk portion 7. Is adjusted so that tar or the like in the heat transfer tube 8 does not solidify.

すなわち、制御盤15は、少なくともサーモコントローラ16とインバータ17とを備えているが、サーモコントローラ16には、予め一定の数値が記録されており、排気温度計14からサーモコントローラ16に送られてきた温度データの値が予め記録されている数値を下回った場合、インバータ17は、フレッシュエア吸入ファン10内のファンの回転数を下げ、これにより、被加熱気体11の吸入量を減少させる。
また、インバータ17は、排気温度計14からサーモコントローラ16に送られてきた温度データの値が予め記録されている数値を超えた場合、フレッシュエア吸入ファン10内のファンの回転数を上げ、これにより、被加熱気体11の吸入量を増量させる。
That is, the control panel 15 includes at least a thermo controller 16 and an inverter 17, and a predetermined numerical value is recorded in the thermo controller 16 in advance, and is sent from the exhaust thermometer 14 to the thermo controller 16. When the value of the temperature data falls below a pre-recorded numerical value, the inverter 17 decreases the rotational speed of the fan in the fresh air suction fan 10, thereby reducing the amount of suction of the heated gas 11.
Further, the inverter 17 increases the rotational speed of the fan in the fresh air intake fan 10 when the value of the temperature data sent from the exhaust thermometer 14 to the thermo controller 16 exceeds a pre-recorded numerical value. As a result, the amount of suction of the heated gas 11 is increased.

加熱気体流入口6内にはシャワー18が取り付けられており、注水口19に水を注入することにより、水がシャワー口20より伝熱管8に吹きかけられ、伝熱管8内に滞留しているタール等の異物を溶解し管外に排出されることを補助する。  A shower 18 is attached in the heated gas inlet 6, and water is injected into the water injection port 19, so that water is sprayed from the shower port 20 to the heat transfer tube 8 and stays in the heat transfer tube 8. It helps to dissolve foreign substances such as and discharge them out of the tube.

1 多管式熱交換装置
2 排気ファン
3 熱発生装置
4・9 排気口
5 加熱気体
6 加熱気体流入口
7 胴部
8 伝熱管
10 フレッシュエア吸入ファン
11 被加熱気体
12 フレッシュエア出口
13 送風管
14 排気温度計
15 制御盤
16 サーモコントローラ
17 インバータ
18 シャワー
19 注水口
20 シャワー口
DESCRIPTION OF SYMBOLS 1 Multi-tube heat exchanger 2 Exhaust fan 3 Heat generator 4 * 9 Exhaust port 5 Heated gas 6 Heated gas inflow port 7 Body part 8 Heat transfer tube 10 Fresh air suction fan 11 Heated gas 12 Fresh air outlet 13 Blower tube 14 Exhaust thermometer 15 Control panel 16 Thermo-controller 17 Inverter 18 Shower 19 Filling port 20 Shower port

Claims (2)

内部に被加熱気体を流通させる胴部と、該胴部内に配置され内部に加熱気体を流通させる複数の伝熱管とを備える多管式熱交換装置において、該伝熱管から排出される加熱気体の温度を検知する排気温度測定手段と、該測定手段より検知される加熱気体の温度に応じて該胴部に流入する被加熱気体の流量を制御する吸気流量制御手段とを備えたことを特徴とする多管式熱交換装置。  In a multi-tube heat exchange device comprising a body part for circulating a heated gas inside and a plurality of heat transfer pipes arranged in the body part for circulating heated gas inside, the heating gas discharged from the heat transfer pipe Exhaust temperature measurement means for detecting the temperature, and intake air flow rate control means for controlling the flow rate of the heated gas flowing into the body according to the temperature of the heated gas detected by the measurement means, Multi-tube heat exchange device. 該伝熱管の流入口付近において不燃流体を噴射するための噴射手段を備えたことを特徴とする請求項1記載の多管式熱交換装置。  2. The multi-tube heat exchange device according to claim 1, further comprising injection means for injecting an incombustible fluid in the vicinity of the inlet of the heat transfer tube.
JP2009001544U 2009-02-23 2009-02-23 Multi-tube heat exchanger Expired - Fee Related JP3151794U (en)

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