JP6518048B2 - Exhaust heat recovery and utilization system for offset rotary printing press - Google Patents
Exhaust heat recovery and utilization system for offset rotary printing press Download PDFInfo
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- JP6518048B2 JP6518048B2 JP2014180106A JP2014180106A JP6518048B2 JP 6518048 B2 JP6518048 B2 JP 6518048B2 JP 2014180106 A JP2014180106 A JP 2014180106A JP 2014180106 A JP2014180106 A JP 2014180106A JP 6518048 B2 JP6518048 B2 JP 6518048B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
本発明は、オフセット輪転印刷機の排熱回収利用システムに関する。 The present invention relates to an exhaust heat recovery and utilization system for a rotary offset printing press.
典型的なオフセット輪転印刷機は、ロール紙（ウェブ）を供給する紙送りを起点として、ロール紙の搬送方向に沿って、墨、藍、紅、黄各色インクの印刷を割り当てられた４台１組の印刷部、インクを熱風乾燥及び脱臭する乾燥脱臭部、ロール紙を冷却する冷却部、折り・断裁を行う折部で構成されており、印刷機で印刷された紙は、ドライヤで熱風乾燥され、冷却ローラで冷却され、折り、断裁後、製本等の次工程に送られる。 A typical offset rotary printing press has four machines assigned printing of black, yellow, red and yellow inks along the roll paper transport direction starting from the paper feed that supplies roll paper (web) 1 It consists of a printing unit, a drying deodorizing unit for hot air drying and deodorizing ink, a cooling unit for cooling roll paper, and a folding unit for folding and cutting, and the paper printed by the printing machine is dried by hot air using a dryer. The sheet is cooled by a cooling roller, folded, cut, and sent to the next process such as bookbinding.
ドライヤで熱風乾燥された空気は、気化したインク由来の有機溶媒や悪臭物質を含むことから、酸化触媒を通して処理するのが一般的である。この酸化触媒を通過した後の排気ガスは２５０℃〜３５０℃程度と高温であるが、その熱は利用されることなくそのまま排出されていた。 It is common to treat through an oxidation catalyst because air dried by hot air in a dryer contains an organic solvent derived from the vaporized ink and an offensive odor material. Although the exhaust gas after passing through the oxidation catalyst has a high temperature of about 250 ° C. to 350 ° C., the heat is discharged as it is without being used.
排気ガスの熱を有効利用する試みとして、例えば特許文献１や特許文献２には、複数のオフセット輪転印刷機から乾燥脱臭装置を通って排出された高温度排ガスをダクトによって１本の煙道に集約し、この集約された煙道から１台の熱交換器で排熱回収し、回収した排熱で温水を製造し、この温水により冷凍機を用いて冷水を製造し、冷却ローラの冷却に利用する構成が提案されている。しかし、複数のダクトを取り回して１本にまとめて熱交換することから、熱交換器としては、大型のオーダーメイド品を採用せざるを得ず、定期的なメンテナンスにコストもかかるうえ、１台の熱交換器に蓄積するスケールの洗浄除去のために複数のオフセット輪転印刷機の排熱回収を全停止しなければならないという問題がある。 As an attempt to effectively use the heat of exhaust gas, for example, Patent Document 1 and Patent Document 2 disclose high-temperature exhaust gas discharged from a plurality of offset rotary printing presses through a drying and deodorizing device into a single flue by a duct. The collected heat is collected from the collected flue with a single heat exchanger, the collected waste heat is used to produce hot water, the hot water is used to produce cold water using a refrigerator, and the cooling roller is cooled The configuration to be used has been proposed. However, since multiple ducts are put together and heat exchanged into one, it is necessary to adopt a large custom-made product as a heat exchanger, and it costs more for regular maintenance, and one unit There is a problem that the exhaust heat recovery of a plurality of rotary offset printing presses must be completely stopped in order to wash out the scale that accumulates in the heat exchanger of the above.
特許文献３には、材料ウェブを冷却ローラによって冷却する装置が提案されているが、蒸気発生器によって発生する水蒸気が蒸気噴射真空ノズルに通され、狭くなった断面を有している地点で真空が形成され、冷媒が入っている真空室に供給され、冷媒が気化し、冷媒は気化熱を奪われることで冷却されて、冷却ローラに送られるので、冷却コストが高くなり、冷却装置が複雑化し、エネルギー効率は十分とはいえない。 Patent document 3 proposes an apparatus for cooling a material web by means of a cooling roller, but the steam generated by the steam generator is passed through a steam jet vacuum nozzle and vacuumed at the point where it has a narrowed cross section. Is supplied to the vacuum chamber containing the refrigerant, the refrigerant is vaporized, and the refrigerant is cooled by being deprived of the heat of vaporization and sent to the cooling roller, so that the cooling cost becomes high and the cooling device is complicated. Energy efficiency is not sufficient.
そこで本発明は、設備稼働率を維持しつつメンテナンスコストを低減することが可能なオフセット輪転印刷機の排熱回収利用システムを提供することを課題とする。 Therefore, an object of the present invention is to provide an exhaust heat recovery and utilization system of an offset rotary printing press capable of reducing maintenance costs while maintaining a facility operation rate.
上記の課題に鑑みて、本発明は、ウェブの搬送方向に沿って、印刷機、熱風乾燥機、予熱装置を有する脱臭装置、及び、冷却装置を備えた１組のオフセット輪転印刷機の排熱回収利用システムにおいて、前記熱風乾燥機は、ウェブの搬送経路を開口した箱型の乾燥室内に、前記ウェブの搬送経路を挟んで上下所定の間隔を開けて配置された熱風供給路と、吸込口及び送風口を前記乾燥室内に開放した送風機と、該送風機の送風口から送られた熱気を加熱して前記熱風供給路に誘導する加熱装置とで構成されており、前記熱風供給路は、前記加熱装置で加熱された熱気を導入する導入口と、前記ウェブの搬送経路に面した開口部から熱風を噴射するノズルとを有し、前記乾燥室には排気口が設けられており、該排気口が排気ファンと接続し、前記排気ファンは、排気予熱用熱交換器と接続し、排気を送っており、該排気口を起点として前記熱風乾燥機から排出される熱風の流路上には、前記排気ファン、互いに接触する受熱通路及び放熱通路を有する前記排気予熱用熱交換器、及び前記脱臭装置が直列に接続され、前記脱臭装置の下流には返送ダクトが取り付けられ、該返送ダクトから排気ダクトが分岐し、前記排気ダクトは前記排気予熱用熱交換器の前記放熱通路に接続し、該放熱通路の下流側には、前記排気温水熱交換器が接続し、前記返送ダクトから分岐したバイパスダクトを介して前記ノズルに熱風を還流させ、前記排気温水熱交換器における熱交換で得られた温水を熱源として冷水を製造する冷凍機を備え、前記排気温水熱交換器は、熱風の流路上に脱着可能な状態で設けられたアルミニウム製又はアルミニウム合金製並行流型熱交換器を含み、前記排気温水熱交換器は、前記脱臭装置から排出される熱風の流路上に並行流が形成されるよう複数のアルミニウム製又はアルミニウム合金製並行流型熱交換器を対向配置して構成しており、前記アルミニウム製又はアルミニウム合金製並行流型熱交換器の間隔は、上流側が狭く下流に向かうにつれて広がっており、前記アルミニウム製又はアルミニウム合金製並行流型熱交換器が交換可能な構造であり、前記排気温水熱交換器は、１組のオフセット輪転印刷機につき、一対一で対応するように設けられ、前記アルミニウム製又はアルミニウム合金製並行流型熱交換器は、放熱フィンと、内部に複数の並行流路を形成した冷媒管と、該冷媒管と連通する冷水導管および温水導管とを備え、前記冷水導管および前記温水導管は、前記冷媒管に対して直交するように該冷媒管の両側に設けられ、前記冷水導管および前記温水導管の同じ側の端部にフランジ構造が設けられているオフセット輪転印刷機の排熱回収利用システムである。脱臭装置は熱風乾燥機に一体的に取り付けられていることが好ましく、熱風乾燥機から排出される熱風が脱臭装置で脱臭された後、脱臭装置から排出されることが好ましい。これにより、熱交換器に蓄積するスケールの洗浄除去による排熱回収装置の全停止が回避でき、オフセット輪転印刷機の設備稼働率を維持しつつ、メンテナンスコストを低減することが可能なオフセット輪転印刷機の排熱回収利用システムを提供できる。前記排気予熱用熱交換器と前記排気温水熱交換器の間に切替ダンパーを設け、該切替ダンパーを切り替えることにより、排気を大気開放することを特徴とする。 SUMMARY OF THE INVENTION In view of the above problems, the present invention is directed to a waste heat of a set of a rotary offset printing press including a printing press, a hot air drier, a deodorizing apparatus having a preheating apparatus, and a cooling apparatus along the web conveyance direction. In the collection and utilization system, the hot-air drier includes a hot-air supply path disposed at a predetermined interval above and below the web transfer path in a box-shaped drying chamber in which the web transfer path is opened; And a heating device for heating the hot air sent from the air blowing port of the air blower to guide the hot air supply path to the hot air supply path, and the hot air supply path includes The drying chamber has an inlet for introducing hot air heated by a heating device, and a nozzle for jetting hot air from an opening facing the transport path of the web, and an exhaust port is provided in the drying chamber. The mouth is connected to the exhaust fan Exhaust fan is connected to the exhaust preheating heat exchanger, and send the exhaust, the flow path of the hot air discharged from the hot air drier exhaust port as the starting point, the exhaust fan, heat in contact with each other the exhaust preheating heat exchanger having a passage, and the heat radiation passage, and said deodorizing apparatus is connected in series, downstream in the return duct is mounted in the deodorizing apparatus, the exhaust duct is branched from the return duct, the exhaust duct is connected to the heat release path of the exhaust preheating heat exchanger, on the downstream side of the heat radiation passage connects the pre Symbol exhaust hot water heat exchanger, through said bypass duct branching from the return duct A hot water is returned to the nozzle, and a refrigerator that uses the hot water obtained by heat exchange in the exhaust hot water heat exchanger as a heat source to produce cold water is provided. The exhaust hot water heat exchanger is in a removable state on the hot air flow path. Provided by Aluminum or aluminum alloy parallel flow heat exchanger, the exhaust hot water heat exchanger is made of a plurality of aluminum or aluminum so that a parallel flow is formed on the flow path of the hot air discharged from the deodorizing device The parallel flow heat exchangers made of alloy are arranged opposite to each other, and the space between the parallel flow heat exchangers made of aluminum or aluminum alloy narrows on the upstream side and spreads as it goes downstream. An aluminum alloy parallel flow type heat exchanger is a replaceable structure, and the exhaust hot water heat exchanger is provided to correspond one-to-one to a set of offset rotary printing machines, and the aluminum or aluminum alloy is provided. A parallel flow type heat exchanger made of a heat exchanger, a heat radiation fin, a refrigerant pipe having a plurality of parallel flow passages formed therein, a cold water pipe communicating with the refrigerant pipe, and a temperature A water pipe, the cold water pipe and the hot water pipe being provided on both sides of the refrigerant pipe so as to be orthogonal to the refrigerant pipe, and having a flange structure at the same side end of the cold water pipe and the hot water pipe Is an exhaust heat recovery and utilization system for a rotary offset printing press provided with It is preferable that the deodorizing apparatus be integrally attached to the hot air dryer, and it is preferable that the hot air discharged from the hot air dryer is discharged from the deodorizing apparatus after being deodorized by the deodorizing apparatus. In this way, it is possible to avoid the entire shutdown of the exhaust heat recovery device due to the washing and removal of the scale accumulated in the heat exchanger, and to reduce maintenance costs while maintaining the operation rate of the offset rotary printing press. We can provide an exhaust heat recovery system for aircraft. A switching damper is provided between the exhaust preheating heat exchanger and the exhaust hot water heat exchanger, and the switching damper is switched to open the exhaust to the atmosphere.
本構成では、比較的安価なアルミニウム製又はアルミニウム合金製並行流型熱交換器を脱着可能な状態で設けたことにより、熱交換器においてスケールが蓄積した際は交換すれば足りることから、従来使用のオーダーメイドの熱交換器において必要であった洗浄人員によるスケールの除去作業が不要になり、メンテナンスコストを大幅に低減することができる。なお、アルミニウム製又はアルミニウム合金製並行流型熱交換器としては、自動車エアコン用の熱交換器に含まれるものが挙げられるが、自動車用でもエアコン以外の他の用途のものでもよい。また、その他アルミ板フィンを組み合わせたフィン及びチューブ熱交換器など材質・形式を問わず、空冷式熱交換器（表面式熱交換器）であれば良い。 In this configuration, the relatively inexpensive aluminum or aluminum alloy parallel flow type heat exchanger is provided in a removable state, and thus it is sufficient to replace the scale when it is accumulated in the heat exchanger. This eliminates the need for removing the scale by the cleaning personnel, which was required in the custom-made heat exchanger of the above, and can significantly reduce maintenance costs. In addition, although the thing contained in the heat exchanger for automobile air-conditioners is mentioned as a product made from aluminum or aluminum alloy made parallel flow type heat exchanger, it may be things for other uses besides cars or air-conditioners. In addition, regardless of the material and type of fins and tube heat exchangers in which aluminum plate fins are combined and the like, air-cooled heat exchangers (surface-type heat exchangers) may be used.
上記システムにおいて、前記排気温水熱交換器は、前記脱臭装置から排出される熱風の流路上に並行流が形成されるよう複数の熱交換器を対向配置して構成しており、前記熱交換器の間隔は、上流側が狭く下流に向かうにつれて広がっていることが好ましい。本構成により、放熱フィンをダクトに対して垂直に配置する場合に比べてダクトを小型化できるとともに効率的な熱交換が可能となる。また、風の流れは、下から上で、Ｖ方向の上流側は狭く、下流側が広い流れになる。熱交換器は複数でもよく、２枚に限定されず、３枚以上でも良い。 In the above system, the exhaust hot water heat exchanger is configured by opposing a plurality of heat exchangers so as to form a parallel flow on the flow path of the hot air discharged from the deodorizing device, and the heat exchanger It is preferable that the interval between the two is narrow as the upstream side narrows toward the downstream. According to this configuration, the duct can be miniaturized and efficient heat exchange can be performed as compared with the case where the heat dissipating fins are disposed perpendicularly to the duct. In addition, the flow of wind is from the bottom to the top, the upstream side in the V direction is narrow, and the downstream side is a broad flow. A plurality of heat exchangers may be used, and the number of heat exchangers is not limited to two, and may be three or more.
本発明では、熱交換器からの駆動熱源温水を温水タンクに貯留し、温水ゾーンと冷水ゾーンの境界に位置する排熱回収冷凍機で、温水を駆動熱源として冷水を作る構成であり、排熱回収冷凍機を吸着式とすることにより吸収式冷凍機を使用した場合より、下記利点が付加される。温熱源温度流量条件としては、例えば、吸収式８０℃以上にて定格５０％の能力に対し吸着式６５℃以上で定格５０％の能力の確保が可能である。よって、温熱源の回収変動に対し広条件にて追随運転が可能である。立上・停止時間条件としては、吸収式では立上時間が約３０分程度で停止即停止し、吸着式では立上時間が約１０分程度で停止１５分程度である。よって、印刷機の稼働に合わせた供給が可能である。 In the present invention, the drive heat source hot water from the heat exchanger is stored in a hot water tank, and the exhaust heat recovery refrigerator located at the boundary between the hot water zone and the cold water zone is configured to make cold water using the hot water as a drive heat source By making the recovery refrigerator of the adsorption type, the following advantages are added compared to the case of using an absorption refrigerator. As the heat source temperature flow rate condition, for example, it is possible to secure the ability of rated 50% at adsorption type 65 ° C. or higher to the ability of rated 50% at absorption type 80 ° C. or higher. Therefore, it is possible to follow operation with wide conditions against recovery fluctuation of the heat source. As the rise / stop time conditions, in the absorption type, the rise time is about 30 minutes and immediately stop, and in the adsorption type, the rise time is about 10 minutes and about 15 minutes. Therefore, it is possible to supply according to the operation of the printing press.
また、本発明により、温水タンクを介し、熱交換器からの排熱源を回収系と供給系とに独立することにより、例えば、熱交換器からの流量確保が難しい場合においても、温水タンクを介し、供給ラインが独立している為、温熱源の駆動流量は安定され、温度も保有タンクにより、均一化の方向となる。 Further, according to the present invention, by making the exhaust heat source from the heat exchanger independent of the recovery system and the supply system via the hot water tank, for example, even if it is difficult to secure the flow rate from the heat exchanger, Since the supply line is independent, the driving flow rate of the heat source is stabilized, and the temperature also becomes the direction of equalization by the holding tank.
なお、吸収式と吸着式冷凍機のいずれも採用可能である。吸着式機器単体での効能として、吸着式の方が吸収式より温熱源条件の幅が広いので、効果をより生かせる設備となっている。 In addition, both an absorption type and an adsorption type refrigerator are employable. As the effect of the adsorption type device alone, the range of the heat source condition is wider in the adsorption type than in the absorption type, so it is a facility that makes the most of the effect.
上記システムにおいて、熱交換器と冷凍機との間を循環する温水循環配管を備え、この温水循環配管のうち、冷凍機に温水を供給する配管の途中に温水を一時貯留するタンクを備え、熱交換器に温水を返送する配管の一部が分岐して前記タンクに接続していることが好ましい。本構成により、熱交換器からの熱源回収ラインと冷凍機への熱源供給ラインとが独立して稼働可能になるので、熱交換器からの流量確保が難しい場合でも温熱源の駆動流量が安定化され、温水温度も均一化される。 In the above system, a hot water circulation pipe that circulates between a heat exchanger and a refrigerator is provided, and among the hot water circulation pipes, a tank for temporarily storing hot water is provided in the middle of a pipe that supplies hot water to the refrigerator, It is preferable that a part of the piping for returning the hot water to the exchanger is branched and connected to the tank. With this configuration, since the heat source recovery line from the heat exchanger and the heat source supply line to the refrigerator can be operated independently, the driving flow rate of the heat source is stabilized even when it is difficult to secure the flow rate from the heat exchanger The hot water temperature is also equalized.
上記冷凍機は、吸着式冷凍機であることが好ましい。従来、冷凍方式において低温水吸収式を採用している都合、駆動熱源として安定的に一定量以上の熱が供給されることを要求するため、複数のオフセット輪転印刷機の同時駆動や、熱風乾燥機温度が高温である必要があったが、温熱源の改修変動に対して広範囲に対応して追随運転が可能となる。また、冷凍機の立ち上げ時間及び停止時間が短縮し、印刷機の稼働期間に合わせた冷水供給が可能になる。 The refrigerator is preferably an adsorption type refrigerator. Conventionally, a low temperature water absorption type has been adopted in the refrigeration method, and it is required to stably supply a fixed amount or more of heat as a driving heat source. Therefore, simultaneous driving of a plurality of offset rotary printing presses, hot air drying Although the machine temperature had to be high, the follow-up operation can be performed widely in response to the change in the temperature of the heat source. In addition, the start-up time and stop time of the refrigerator are shortened, and it becomes possible to supply cold water in accordance with the operation period of the printing press.
本発明の具体的態様において、温水タンクのみ付加する場合は以下の通りの構成が好ましい。オフセット輪転印刷機の排熱回収再利用システムは、オフセット輪転印刷機の熱風乾燥機に脱臭装置を一体的に取り付け、前記脱臭装置の出口配管から乾燥・脱臭した熱風を排出すること、前記出口配管にアルミニウム製又はアルミニウム合金製並行流型熱交換器を脱着可能に配設し、熱風を利用して、前記熱交換器で水を温水に変換する構成であること、前記熱交換器からの温水を温水タンクに貯留し、温水ゾーンと冷水ゾーンの境界に位置する排熱回収冷凍機で、温水を駆動熱源として冷水を作る構成であり、駆動熱源の恒常化の為、温水タンクを介し、温水保有水量及び温度を平均化させ温度、圧力のハンチングを抑え、安定的に温水源を循環させることにより、温水ゾーンと冷水ゾーンとの均整化を図ることができる。この場合、排熱回収式冷凍機から排出される冷水で前記オフセット輪転印刷機の冷却ローラーを冷却する構成であることが好ましい。 In the specific embodiment of the present invention, when only the hot water tank is added, the following configuration is preferable. The exhaust heat recovery and reuse system of the web offset printing press integrally attaches a deodorizing device to a hot air dryer of the web offset printing press, and discharges dried and deodorized hot air from an outlet pipe of the deodorizing device, the outlet pipe A parallel flow type heat exchanger made of aluminum or aluminum alloy so as to be removable, and using a hot air, the heat exchanger converts the water into hot water, the hot water from the heat exchanger Is stored in a hot water tank, and is an exhaust heat recovery refrigerator located at the boundary between a hot water zone and a cold water zone, and configured to make cold water using the hot water as a driving heat source, for making the driving heat source constant, through the hot water tank It is possible to balance the hot water zone and the cold water zone by averaging the amount of retained water and temperature, suppressing hunting of temperature and pressure, and circulating the hot water source stably. In this case, it is preferable that the cooling roller of the rotary offset printing press be cooled with cold water discharged from an exhaust heat recovery type refrigerator.
さらに、本発明の具体的態様において、吸着式冷凍機に温水タンクを付加する場合の構成は以下の通りである。オフセット輪転印刷機の排熱回収再利用システムは、オフセット輪転印刷機の熱風乾燥機に脱臭装置を一体的に取り付け、前記脱臭装置の出口配管から乾燥・脱臭した熱風を排出すること、前記出口配管にアルミニウム製又はアルミニウム合金製並行流型熱交換器を脱着可能に配設し、熱風を利用して、前記熱交換器で水を温水に変換する構成であること、前記熱交換器からの駆動熱源温水を温水タンクに貯留し、温水ゾーンと冷水ゾーンの境界に位置する排熱回収冷凍機で、温水を駆動熱源として冷水を作る構成であり、排熱回収冷凍機を吸着式とすることにより、吸収式冷凍機を使用した場合より下記利点が付加される。 Furthermore, in the specific embodiment of the present invention, the configuration in the case of adding a hot water tank to the adsorption type refrigerator is as follows. The exhaust heat recovery and reuse system of the web offset printing press integrally attaches a deodorizing device to a hot air dryer of the web offset printing press, and discharges dried and deodorized hot air from an outlet pipe of the deodorizing device, the outlet pipe A parallel flow type heat exchanger made of aluminum or aluminum alloy is detachably disposed, and the heat exchanger is configured to convert water into hot water using hot air, and driving from the heat exchanger Heat source hot water is stored in a hot water tank, and the exhaust heat recovery refrigerator located at the boundary between the hot water zone and the cold water zone is configured to make cold water using the hot water as a driving heat source, and the exhaust heat recovery refrigerator is an adsorption type. The following advantages are added to the use of an absorption refrigerator.
すなわち、温熱源の温度流量条件としては、吸収式では８０℃以上にて定格５０％能力に対し、吸着式では、６５℃以上で定格５０％の能力の確保ができる。よって、温熱源の回収変動に対し 広条件にて追随運転が可能である。立上・停止時間の条件は、吸収式では、立上時間が約３０分程度で停止即停止であり、吸着式では、立上時間が約１０分程度で停止に１５分程度かかる。よって、印刷機の働に合わせた供給が可能である。温水タンクを介し、温水保有水量及び温度を平均化させることでより温熱源の変動を抑え、温度、圧力のハンチングを抑え、安定的に温水源を循環させることにより、温水ゾーンと冷水ゾーンとの均整化を図ることができる。前記排熱回収冷凍機から排出される冷水で前記オフセット輪転印刷機の冷却ローラーを冷却する構成であることが好ましい。 That is, as the temperature flow condition of the heat source, the capacity of 50% rated at 80 ° C. or more can be secured for the absorption type, and the capacity of 50% rated at 65 ° C. or higher for the adsorption type. Therefore, it is possible to follow operation under a wide range of conditions for recovery fluctuation of the heat source. The conditions for the rise and stop times are about 30 minutes in the absorption type, about 30 minutes in the rise time, and about 10 minutes in the adsorption type, and about 15 minutes in the rise time. Therefore, it is possible to supply according to the operation of the printing press. By averaging hot water holding water volume and temperature via hot water tank, fluctuation of warm heat source is suppressed more, hunting of temperature and pressure is suppressed, and by circulating warm water source stably, between hot water zone and cold water zone It can be balanced. It is preferable that the cooling roller of the offset rotary printing press is cooled by cold water discharged from the exhaust heat recovery refrigerator.
本発明の好適な実施形態１であるオフセット輪転印刷機の排熱回収利用システム１について、図１〜図８を参照して以下に説明する。 An exhaust heat recovery and utilization system 1 for a web offset printing press, which is a preferred embodiment 1 of the present invention, will be described below with reference to FIGS. 1 to 8.
オフセット輪転印刷機の排熱回収利用システム１は、図１に示すように、オフセット輪転印刷機２と、１組のオフセット輪転印刷機につき、一対一で対応するように設けられた熱風乾燥機１３と、熱風乾燥機１３に一体的に取り付けられた脱臭装置４、及び排気温水熱交換器６と、この排気温水熱交換器６における熱交換で得られた温水を熱源として冷水を製造する冷凍機８とで構成される。なお、図１では熱風の流れを分かり易くするために、熱風乾燥機１３と脱臭装置４とは、便宜上分離しているが、これらは一体形成されている。 As shown in FIG. 1, the exhaust heat recovery and utilization system 1 of the web offset printing press is a hot air drier 13 provided to correspond one-to-one with the web offset printing press 2 and a set of web offset printing presses. And the deodorizing device 4 integrally attached to the hot air dryer 13, the exhaust hot water heat exchanger 6, and the refrigerator producing cold water using the hot water obtained by heat exchange in the exhaust hot water heat exchanger 6 as a heat source And eight. In addition, in order to make the flow of a hot air intelligible in FIG. 1, although the hot-air dryer 13 and the deodorizing apparatus 4 are isolate | separated for convenience, they are integrally formed.
オフセット輪転印刷機２は、ロール紙の回転によって連続的に繰り出されるウェブＷに対して、各色印刷、インク乾燥、インク定着及び冷却を順次行う機械であり、ウェブＷの搬送方向に沿って、印刷機１１、熱風乾燥機１３、冷却装置１５及び折部（図示略）を備えている。 The web offset printing press 2 is a machine that sequentially performs printing of each color, ink drying, ink fixation and cooling on the web W continuously fed by rotation of roll paper, and printing along the web W transport direction A machine 11, a hot air drier 13, a cooling device 15, and a fold (not shown) are provided.
印刷機１１は、墨、藍、紅、黄各色インクの印刷を割り当てられた４台の印刷ユニット１２をウェブＷの搬送方向に沿って直列に配置することで構成されている。各印刷ユニット１２は、図示しないインキつぼから版面へとインキを練りながら供給する複数のインキローラを備えている。複数のインキローラのうち所定のローラには、内部に冷水を通すための循環路が形成されている。 The printing machine 11 is configured by arranging four printing units 12 to which printing of black, yellow, red and yellow inks is assigned in series along the transport direction of the web W. Each printing unit 12 is provided with a plurality of ink rollers which supply the ink while kneading it from an ink fountain (not shown) to the printing surface. Among the plurality of ink rollers, a predetermined roller is formed with a circulation path for passing cold water inside.
熱風乾燥機１３は、ウェブＷの搬送経路１４を開口した箱型の乾燥室１６内に、ウェブＷの搬送経路１４を挟んで上下所定の間隔を開けて配置された熱風供給路１７と、吸込口１８及び送風口１９を乾燥室１６内に開放した送風機２１と、送風機２１の送風口１９から送られた熱気を加熱して熱風供給路１７に誘導する加熱装置２３とで構成されており、熱風供給路１７は、加熱装置２３で加熱された熱気を導入する導入口２４と、ウェブＷの搬送経路１４に面した開口部２５から熱風を噴射するノズル２６とを有している。なお、熱風乾燥機１３の内部には図示は略すが熱交換器を設けている。 The hot-air drier 13 includes a hot-air supply path 17 disposed at a predetermined interval above and below the transport path 14 of the web W in the box-shaped drying chamber 16 in which the transport path 14 of the web W is opened. The air blower 21 has an opening 18 and an air outlet 19 opened in the drying chamber 16, and a heating device 23 for heating the hot air sent from the air outlet 19 of the air blower 21 and guiding it to the hot air supply path 17. The hot air supply path 17 has an inlet 24 for introducing the hot air heated by the heating device 23 and a nozzle 26 for injecting the hot air from an opening 25 facing the transport path 14 of the web W. A heat exchanger (not shown) is provided inside the hot air dryer 13.
乾燥室１６の上部には、排気口２７が設けられており、この排気口２７を起点として熱風乾燥機１３から排出される熱風の流路上には、排気ファン２８、互いに接触する受熱通路３１及び放熱通路３２を有する排気予熱用熱交換器３３、脱臭装置４が直列に接続され、図３（ａ）に示す通り、排気予熱用熱交換器３３から切替ダンパー３９を介して排気温水熱交換器６が接続している。図３（ａ）中において、矢印は熱風の流れである。 An exhaust port 27 is provided at the upper portion of the drying chamber 16, and an exhaust fan 28, a heat receiving passage 31 in contact with each other, and an exhaust fan 28 are provided on the hot air flow path discharged from the hot air dryer 13 starting from the exhaust port 27. An exhaust preheating heat exchanger 33 having a heat radiation passage 32 and a deodorizing device 4 are connected in series, and as shown in FIG. 3A, the exhaust preheating heat exchanger 33 to the exhaust hot water heat exchanger through a switching damper 39 6 is connected. In FIG. 3A, arrows indicate the flow of hot air.
脱臭装置４は、排気予熱用熱交換器３３の受熱通路３１の下流側に設置されており、排気流れに沿って、臭気を触媒反応に適した温度まで加熱する予熱装置３４、白金系の金属触媒を多孔質担体に担持させた酸化触媒３５を備えている。酸化触媒３５の両側領域には熱電対３５ａ，３５ｂが配置されて、熱風の温度を計測する。熱電対３５ａ，３５ｂの計測結果は温度調整制御部（図示略）に入力されて、風量制御を行うとともに、温度調整を行う。 The deodorizing device 4 is installed downstream of the heat receiving passage 31 of the exhaust preheating heat exchanger 33, and heats the odor to a temperature suitable for catalytic reaction along the exhaust flow, platinum-based metal An oxidation catalyst 35 having a catalyst supported on a porous carrier is provided. Thermocouples 35a and 35b are disposed on both sides of the oxidation catalyst 35 to measure the temperature of the hot air. The measurement results of the thermocouples 35a and 35b are input to a temperature adjustment control unit (not shown) to perform air volume control and to perform temperature adjustment.
酸化触媒３５の下流には、返送ダクト３６が取り付けられ、返送ダクト３６は、排気予熱用熱交換器３３の放熱通路３２に接続し、放熱通路３２の下流側には、排気温水熱交換器６が接続している。返送ダクト３６からバイパスダクト３８が分岐し、ノズル２６に熱風を還流させている。ダクト放熱通路３２から排気温水熱交換器６に向かう排気ダクト３７は、熱風乾燥機１３から延び、排気ファン２８と接続し、排気ファン２８は、排気予熱用熱交換器３３と接続し、排気を送っている。
A return duct 36 is attached downstream of the oxidation catalyst 35, and the return duct 36 is connected to the heat release passage 32 of the exhaust preheating heat exchanger 33, and the exhaust hot water heat exchanger 6 is connected downstream of the heat release passage 32. Is connected. A bypass duct 38 branches off from the return duct 36 and circulates the hot air to the nozzle 26 . An exhaust duct 37 extending from the duct heat radiation passage 32 to the exhaust hot water heat exchanger 6 extends from the hot air dryer 13 and is connected to the exhaust fan 28, and the exhaust fan 28 is connected to the exhaust preheating heat exchanger 33 to exhaust the exhaust. to be sending.
排気温水熱交換器６は、図２（ａ）（ｂ）に示す通り、概ね板状の外観を有する並行流型熱交換器６１を、排気ダクト３７内に２枚１組で配置したものを採用している。これら２枚の並行流型熱交換器６１の間隔は、上流側が狭く下流に向かうにつれて広くなっており、図３（ａ）に示す通り、正面視で概ねＶ字型に配置されている。並行流型熱交換器６１は、伝熱効果を高めるために波形に加工したアルミニウム製又はアルミニウム合金製の放熱フィン６２と、内部に複数の並行流路を形成した冷媒管６４とを交互に積層して、冷媒管６４の並行流路と連通する冷水導管６６及び温水導管６７を冷媒管６４に対して直交するように、その両側に形成したものである。冷水導管６６から冷水が供給され、この冷水が複数の冷媒管６４に分流し流れ込む。冷媒管６４に流れる冷水と、放熱フィン６２を通過する高温ガスとの間で熱交換が行われ、冷水が温水となるとともに、高温ガスの温度が低下しながら放熱フィン６２を通過する。そして、温水導管６７から温水が排出される。このように、冷水導管６６、冷媒管６４、温水導管６７の流れは、一方向の水の流れとなる。なお、フランジ構造６８が冷水導管６６、温水導管６７の同じ側の端部に設けてある。冷媒管６４はアルミニウム製又はアルミニウム合金製である。冷水導管６６及び温水導管６７もアルミニウム製又はアルミニウム合金製である。なお、並行流型熱交換器６１は複数組で配置してもよい。たとえば、並行流型熱交換器６１に対して、図３（ｂ）に示す通り、左右（又は前後）の領域に追加的に単数または複数の組の並行流型熱交換器６１を配置してもよい。盲板を設けて、並行流型熱交換器６１を実質的に奇数個としてもよい。 As shown in FIGS. 2 (a) and 2 (b), the exhaust hot water heat exchanger 6 has a parallel flow type heat exchanger 61 having a substantially plate-like appearance and disposed in a pair of two in the exhaust duct 37. It is adopted. The distance between the two parallel flow heat exchangers 61 narrows on the upstream side and widens toward the downstream, and as shown in FIG. 3A, the space is approximately V-shaped in a front view. The parallel flow type heat exchanger 61 alternately laminates the aluminum or aluminum alloy radiation fin 62 processed into a corrugated shape to enhance the heat transfer effect, and the refrigerant pipe 64 having a plurality of parallel flow paths formed therein. A cold water pipe 66 and a hot water pipe 67 communicating with the parallel flow paths of the refrigerant pipe 64 are formed on both sides so as to be orthogonal to the refrigerant pipe 64. Cold water is supplied from a cold water conduit 66, and the cold water is diverted into the plurality of refrigerant pipes 64 and flows. Heat exchange is performed between the cold water flowing into the refrigerant pipe 64 and the high-temperature gas passing through the radiation fins 62, so that the cold water becomes hot water and passes through the radiation fins 62 while the temperature of the high-temperature gas decreases. Then, the hot water is discharged from the hot water pipe 67. Thus, the flows of the cold water pipe 66, the refrigerant pipe 64, and the hot water pipe 67 are unidirectional water flows. A flange structure 68 is provided at the same end of the cold water conduit 66 and the hot water conduit 67. The refrigerant pipe 64 is made of aluminum or aluminum alloy. The cold water conduit 66 and the hot water conduit 67 are also made of aluminum or aluminum alloy. The parallel flow heat exchangers 61 may be arranged in a plurality of sets. For example, with respect to the parallel flow heat exchanger 61, as shown in FIG. 3 (b), one or more sets of parallel flow heat exchangers 61 are additionally disposed in the left and right (or front and back) regions. It is also good. A blind plate may be provided to make the number of parallel flow heat exchangers 61 substantially odd.
本実施形態の熱交換器６としては、熱風量と温水回収量の観点から、基本的には、アルミニウム製又はアルミニウム合金製並行流型のカーエアコン用（空調用）の汎用品を採用している。自動車用アルミニウム熱交換器は標準では配管接続であるが、本実施形態では、水・温水の取り合い部分については、図２（ａ）（ｂ）に示すようなフランジ構造６８に改良している。排気温水熱交換器６としては、オフセット輪転印刷機２から得られる熱風量と温水回収量に応じて、適宜、フィン及びチューブ熱交換器など材質・形式を問わず空冷式熱交換器であれば様々なタイプの熱交換器を採用することも可能である。交換器の現状については、「社団法人日本アルミニウム協会編：アルミ圧延品ポケットブック２００９ 熱交換器の現状」に記載があるので、参照されたい。 As the heat exchanger 6 of the present embodiment, basically, from the viewpoint of the amount of hot air and the amount of recovered hot water, a general-purpose product for aluminum air flow or aluminum alloy parallel flow type car air conditioner (for air conditioning) is adopted There is. Although aluminum heat exchangers for automobiles are normally connected by piping, in the present embodiment, the connecting portion of water and hot water is improved to a flange structure 68 as shown in FIGS. 2 (a) and 2 (b). As the exhaust hot water heat exchanger 6, if it is an air-cooling type heat exchanger, regardless of the material and type, such as fins and tube heat exchangers, according to the amount of hot air and warm water recovery obtained from the offset rotary printing press 2 It is also possible to employ various types of heat exchangers. For the current status of the exchanger, please refer to "The Japan Aluminum Association, edited by: Japan Aluminum Association Pocket Book 2009: Current Status of Heat Exchanger".
この熱交換器６は、図４〜図７に示す通り、並行流型熱交換器６１を交換可能な構造となっている。両端部がフランジ仕様の配管６９ａ〜６９ｄを用いて、並行流型熱交換器６１のフランジ構造６８及び排気ダクト３７と、それぞれ、接続可能としている。交換の際は、接続部の締結部を解除し、配管６９ａ〜６９ｄを取り外し、並行流型熱交換器６１を引き出し、新品と交換した後、接続部の締結部を締結することにより、フランジ構造６８及び排気ダクト３７を、配管６９ａ〜６９ｄを介して、接続する。人の作業性を考慮した高さに並行流型熱交換器６１を配置している。 The heat exchanger 6 has a structure in which the parallel flow heat exchanger 61 can be replaced as shown in FIGS. 4 to 7. The flange structure 68 and the exhaust duct 37 of the parallel flow heat exchanger 61 can be connected to each other by using pipes 69a to 69d having flange specifications at both ends. At the time of replacement, the fastening portion of the connection portion is released, the pipes 69a to 69d are removed, the parallel flow heat exchanger 61 is drawn out, and after replacing with a new one, the flange portion is formed by fastening the fastening portion of the connection portion. 68 and the exhaust duct 37 are connected via piping 69a-69d. The parallel flow heat exchanger 61 is disposed at a height in consideration of human workability.
冷却装置１５は、所定の間隔を開けて配置された複数のチルローラ５１と複数のガイドローラ５２とで構成されており、チルローラ５１，ガイドローラ５２は、外周面の少なくとも一部にウェブＷを接触させながら次のチルローラ５１，ガイドローラ５２に向けてウェブＷを案内するようにいずれも等速で回転する。チルローラ５１の内部には、中心軸方向に沿って、冷水を通すための貫通路（図示せず）が延びている。 The cooling device 15 is composed of a plurality of chill rollers 51 and a plurality of guide rollers 52 disposed with a predetermined interval, and the chill roller 51 and the guide rollers 52 contact the web W to at least a part of the outer peripheral surface. Both are rotated at a constant speed so as to guide the web W toward the next chill roller 51 and guide roller 52 while making the rotation. Inside the chill roller 51, a through passage (not shown) for passing cold water extends along the central axis direction.
次に、本実施形態における排気温水熱交換器６からの温水のフロー及び冷凍機８からの冷水のフローを示す配管図を図８に示す。温水循環配管９１は、冷凍機８に温水を排気温水熱交換器６から供給する配管９２と、冷凍機８を通った温水を排気温水熱交換器６に返送する配管９３とで構成され、排気温水熱交換器６と冷凍機８との間を温水が循環可能となっている。冷凍機８に温水を供給する配管９２と排気温水熱交換器６に返送する配管９３は、温水を一時貯留する温水タンク９５を介して、配管９４で連結されている。 Next, a piping diagram showing a flow of hot water from the exhaust hot water heat exchanger 6 and a flow of cold water from the refrigerator 8 in the present embodiment is shown in FIG. The hot water circulation pipe 91 includes a pipe 92 for supplying hot water to the refrigerator 8 from the exhaust hot water heat exchanger 6, and a pipe 93 for returning the hot water having passed through the refrigerator 8 to the exhaust hot water heat exchanger 6, Hot water can be circulated between the hot water heat exchanger 6 and the refrigerator 8. The pipe 92 for supplying the hot water to the refrigerator 8 and the pipe 93 for returning the exhaust water heat exchanger 6 are connected by the pipe 94 via the hot water tank 95 for temporarily storing the hot water.
さらに、排気温水熱交換器６と温水タンク９５との間にある配管９３には、一次温水ポンプ９６、温水タンク９５の下流側にある配管９２に二次温水ポンプ９８が、それぞれ設置されている。一次温水ポンプ９６と二次温水ポンプ９８とは独立に作動可能になっており、これらを同時に作動させることも可能である。 Furthermore, a primary hot water pump 96 and a secondary hot water pump 98 are installed in a pipe 92 downstream of the hot water tank 95 in a pipe 93 between the exhaust hot water heat exchanger 6 and the hot water tank 95, respectively. . The primary hot water pump 96 and the secondary hot water pump 98 can be operated independently, and it is also possible to operate them simultaneously.
冷凍機８は、排気温水熱交換器６における熱交換で得られた温水を熱源として冷水を製造するものであり、温水は、上述した温水循環配管９２から供給され、また、排気温水熱交換器６に適宜返送される。冷凍機８は、冷却水循環系統と、冷水系統の２つの系統に個別に接続されている。このように製造された冷水は、冷水循環配管９７によって外部に供給する。温水循環配管９１は１組のオフセット輪転印刷機につき１系統で、排気温水熱交換器６における水・温水の取り合い部分に接続している。冷水循環配管９７は、図１のチルローラ５１の内部に形成された貫通路に接続する系統と、各印刷ユニット１２の所定のインキローラの内部に形成された循環路に接続している。なお、配管９２、９３、９７、１００にはそれぞれバルブ９９ａ〜９９ｌが設置されている。 The refrigerator 8 manufactures cold water using the hot water obtained by heat exchange in the exhaust hot water heat exchanger 6 as a heat source, and the hot water is supplied from the hot water circulation pipe 92 described above, and the exhaust hot water heat exchanger Returned to 6 as appropriate. The refrigerator 8 is individually connected to the cooling water circulation system and the two systems of the cold water system. The cold water thus produced is supplied to the outside by a cold water circulation pipe 97. The hot water circulation pipe 91 is connected to the water / hot water connection portion in the exhaust hot water heat exchanger 6 in one system per one set of offset rotary printing press. The cold water circulation pipe 97 is connected to a system connected to a through passage formed inside the chill roller 51 of FIG. 1 and a circulation path formed inside a predetermined ink roller of each printing unit 12. Note that valves 99a to 99l are installed in the pipes 92, 93, 97, and 100, respectively.
本実施形態では冷凍機８として、吸着式冷凍機を採用している。吸着式冷凍機は、シリカゲルや活性炭などの吸着材が収容された２つの吸着脱離室と、ダンパーの開閉を介してこの吸着脱離室と連通したり隔離されたりする蒸発室及び凝縮室と、吸着材に吸着可能な作動媒体とを備え、２つの吸着脱離室にはそれぞれ真空ポンプが接続され気圧操作が可能になっている。凝縮室内には、内部を水が流れる配管１００が挿入され、その下方には凝縮水受け皿があり、受け皿の下部にはドレインが設けられ、蒸発室のシャワーと連絡している。２つの吸着脱離室における吸着と脱離は所定時間ごとに切り換えられるようになっている。 In the present embodiment, an adsorption type refrigerator is employed as the refrigerator 8. An adsorption type refrigerator comprises two adsorption / desorption chambers containing adsorbents such as silica gel and activated carbon, and an evaporation chamber and a condensation chamber which are communicated with or separated from the adsorption / desorption chambers through opening and closing of dampers. And a working medium capable of adsorbing to the adsorbing material, and a vacuum pump is connected to each of the two adsorption / desorption chambers to enable atmospheric pressure operation. Inside the condensation chamber, a pipe 100 through which water flows is inserted, below which a condensate water pan is provided, at the bottom of the pan a drain is provided and in communication with the shower of the evaporation chamber. The adsorption and desorption in the two adsorption / desorption chambers can be switched at predetermined time intervals.
以上のオフセット輪転印刷機の排熱回収利用システム１の構成に基づく作用効果を説明する。 The operation and effect based on the configuration of the exhaust heat recovery and utilization system 1 of the above-mentioned web offset printing press will be described.
まず、熱風乾燥機１３の送風機２１が稼働すると、乾燥室１６内の空気が吸込口１８から取り込まれて送風口１９を出て加熱装置２３によって加熱されて導入口２４から熱風供給路１７に送り込まれる。上下の熱風供給路１７に充満した熱気は、ノズル２６から所定の圧力をもってウェブＷの両面に噴射される。ウェブＷに吹き付けられた熱風により蒸発したインク溶剤を含む有害な臭気は、対流効果によって乾燥室１６内を上昇し排気口２７から排出される。排出された臭気は、排気ファン２８によって排気予熱用熱交換器３３の受熱通路３１を通過し、臭気の温度が低い場合は予熱装置３４が作動し適切な温度に加熱されたうえで多孔質の酸化触媒３５内を通る。この過程で臭気は、触媒酸化反応によって分解され無害化されるが、同時に反応熱（燃焼熱）を発生することから無害化された排気自体の温度も上昇する。 First, when the blower 21 of the hot air dryer 13 is operated, the air in the drying chamber 16 is taken in from the suction port 18 and exits the air blowing port 19 to be heated by the heating device 23 and fed into the hot air supply passage 17 from the introduction port 24 Be The hot air filled in the upper and lower hot air supply paths 17 is jetted from both sides of the web W at a predetermined pressure from the nozzle 26. The harmful odor containing the ink solvent evaporated by the hot air blown onto the web W rises in the drying chamber 16 by the convection effect and is discharged from the exhaust port 27. The discharged odor passes through the heat receiving passage 31 of the exhaust preheating heat exchanger 33 by the exhaust fan 28, and when the temperature of the odor is low, the preheating device 34 is activated to heat it to an appropriate temperature, and then it is porous. Pass through the oxidation catalyst 35. In this process, the odor is decomposed and detoxified by the catalytic oxidation reaction, but at the same time the reaction heat (combustion heat) is generated, and the temperature of the detoxified exhaust itself also rises.
高温の無害化排気は、返送ダクト３６を通って排気予熱用熱交換器３３の放熱通路３２を通り、接触する受熱通路３１内を通る臭気を帯びた排気に熱を一部受け渡す。これが臭気を帯びた排気にとっては予熱となるので、酸化触媒３５の前段に設けた予熱装置３４の稼働を早期に終了させることができる。その後、無害化排気は、鉛直上方に延びる配管に沿って運ばれ、伝熱効果が高いアルミ製の排気温水熱交換器６のフィン６２と冷媒管６４との間の隙間を通過する。排気の熱は、アルミ製の冷媒管６４を介して内部を通る熱容量の大きい水によって奪われ、そのまま大気に放出される。 The high temperature detoxified exhaust passes the return duct 36, passes through the heat release passage 32 of the exhaust preheating heat exchanger 33, and transfers part of the heat to the odorized exhaust passing through the inside of the heat receiving passage 31 in contact. Since this becomes preheating for the odor-bearing exhaust, the operation of the preheating device 34 provided at the front stage of the oxidation catalyst 35 can be terminated early. Thereafter, the detoxified exhaust gas is carried along a pipe extending vertically upward, and passes through the gap between the fins 62 and the refrigerant pipe 64 of the aluminum exhaust hot water heat exchanger 6 having a high heat transfer effect. The heat of the exhaust is taken away by the water of large heat capacity passing through the inside through the aluminum refrigerant pipe 64 and is released to the atmosphere as it is.
一方、排気温水熱交換器６を通った水は、無害化排気から熱を奪い、温水となる。温水は、排気温水熱交換器６からの充分な流量確保が可能な場合、温水ポンプ９６と９８を作動させることで排気温水熱交換器６→配管９２→二次温水ポンプ９８→冷凍機８→配管９３→一次温水ポンプ９６→排気温水熱交換器６という経路で循環し、温水回収系として運用される。一方、排気温水熱交換器６からの充分な流量確保が難しい場合、一次温水ポンプ９６を停止し、二次温水ポンプ９８のみを作動させることで、温水タンク９５→配管９４→配管９２→冷凍機８→配管９３→配管９４→温水タンク９５という経路で循環し、温水タンク９５に貯留された温水の供給のみを行う。 On the other hand, the water having passed through the exhaust hot water heat exchanger 6 takes heat from the detoxified exhaust and becomes hot water. When hot water can ensure sufficient flow rate from the exhaust hot water heat exchanger 6, the hot water pumps 96 and 98 are operated to operate the exhaust hot water heat exchanger 6 → piping 92 → secondary hot water pump 98 → refrigerator 8 → It circulates through a route of piping 93 → primary hot water pump 96 → exhaust hot water heat exchanger 6 and is operated as a hot water recovery system. On the other hand, when it is difficult to secure a sufficient flow rate from the exhaust hot water heat exchanger 6, the primary hot water pump 96 is stopped and only the secondary hot water pump 98 is operated, thereby the hot water tank 95 → piping 94 → piping 92 → refrigerator 8 → piping 93 → piping 94 → circulation through the route of the hot water tank 95, only the supply of the hot water stored in the hot water tank 95 is performed.
このような２系統の温水フロー系を独立して又は適宜組み合わせて運用することによって、温水タンク９５を介して温水保有水量及び温度が平均化され、温熱源の変動を抑え、温度、圧力のハンチングを抑え、安定的に温水源を循環させることができ、温水ゾーンと冷水ゾーンとの均整化を図ることができる。 By operating such two hot water flow systems independently or in combination as appropriate, the amount of hot water holding water and temperature are averaged via the hot water tank 95 to suppress the fluctuation of the heat source, thereby hunting for temperature and pressure. As a result, the hot water source can be circulated stably, and the hot water zone and the cold water zone can be balanced.
温水回収系又は温水供給系における温水タンク９５からの温水は、冷凍機８内において熱源となる。まず一方の吸着脱離室の吸着材に吸着したアルコールや水などの作動媒体は温水循環配管９１からの温水の熱によって吸着材から脱離し、作動媒体の蒸気の圧力によって凝縮室との境界にあるダンパーが開き、凝縮室内に流れ込む。流れ込んだ作動媒体は、配管１００の表面で液化され受け皿に流下する。この過程で他方の吸着脱離室は減圧によって蒸発室との境界にあるダンパーが開き蒸発室と連通する。 The hot water from the hot water tank 95 in the hot water recovery system or the hot water supply system serves as a heat source in the refrigerator 8. First, the working medium such as alcohol or water adsorbed to the adsorbent in one of the adsorption / desorption chambers is separated from the adsorbent by the heat of the hot water from the hot water circulation pipe 91, and is separated from the condensing chamber by the pressure of the vapor of the working medium. A damper opens and flows into the condensation chamber. The working medium that has flowed in is liquefied on the surface of the pipe 100 and flows down to the receiving tray. In this process, the other adsorption / desorption chamber is decompressed to open the damper at the boundary with the evaporation chamber and communicate with the evaporation chamber.
この状態で、凝縮室で液化された作動媒体がドレインを介して減圧された蒸発室に融通されて、シャワーで冷水循環配管９７の表面に滴下されると、減圧下であるために直ちに揮発し、揮発熱によって冷水循環配管９７内部を流通する水が冷却される。吸着脱離室における吸着と脱離とは所定時間間隔で切り換えられ、冷水を連続的に供給することができるようになっている。 In this state, when the working medium liquefied in the condensation chamber is transferred to the reduced pressure evaporation chamber through the drain and dropped onto the surface of the cold water circulation pipe 97 by the shower, it evaporates immediately because it is under the reduced pressure. The water flowing through the cold water circulation pipe 97 is cooled by the volatilization heat. The adsorption and desorption in the adsorption / desorption chamber are switched at predetermined time intervals so that cold water can be supplied continuously.
このようにして冷凍機８で製造された冷水は、冷水循環配管９７によって各印刷ユニット１２の所定のインキローラ及びチルローラ５１の内部を通り、これらのローラ表面を冷却する。これにより、インキローラ上のインキは所定の粘度に保たれ、熱風乾燥機１３によって加熱されたウェブＷはチルローラ５１の外周面との接触の際に冷却される。 The cold water produced by the refrigerator 8 in this manner passes through the inside of the predetermined ink roller and chill roller 51 of each printing unit 12 by the cold water circulation pipe 97 and cools the roller surfaces. As a result, the ink on the ink roller is maintained at a predetermined viscosity, and the web W heated by the hot air dryer 13 is cooled upon contact with the outer peripheral surface of the chill roller 51.
熱交換器は、熱風乾燥機１３から排出される熱風の流路上に風の流れに対向してＶ字型に２枚配置されていることにより、風の流れに対して垂直になるように配置する場合に比べて排気ダクト３７の断面積が小さくて済み、熱交換後の排気ダクト３７を集合した場合でもダクトの小型化を達成している。また、並行流型熱交換器６１は小型であるため、交換作業の労力や時間を大幅に低減できる。また、並行流型熱交換器６１にスケールが蓄積したとしても、これを単に新品に交換するだけでよいので、蓄積するスケールの洗浄除去による排熱回収装置の全停止が回避でき、オフセット輪転印刷機２の設備稼働率を維持しつつ、メンテナンスコストを低減することが可能である。 Two heat exchangers are arranged in a V-shape facing the flow of the air on the flow path of the hot air discharged from the hot air dryer 13 so that they are perpendicular to the flow of the air In this case, the cross-sectional area of the exhaust duct 37 can be smaller than that in the case where the exhaust duct 37 after heat exchange is assembled, and the duct can be miniaturized. Further, since the parallel flow heat exchanger 61 is small, labor and time for replacement work can be significantly reduced. In addition, even if the scale is accumulated in the parallel flow heat exchanger 61, it is only necessary to simply replace it with a new one, so it is possible to avoid the entire stop of the exhaust heat recovery device due to the cleaning removal of the accumulated scale, and offset rotary printing It is possible to reduce the maintenance cost while maintaining the equipment operation rate of the machine 2.
また冷凍機８として、吸着式冷凍機を採用することにより、６５℃以上で定格５０％能力を確保することができる結果、温熱源の回収変動に対し広条件にて追随運転が可能となるとともに、立上時間が約１０分程度、停止時間が１５分程度と短縮し、印刷機１１の稼働期間に合わせた冷水供給が可能となる。 Further, by adopting an adsorption type refrigerator as the refrigerator 8, the rated 50% capacity can be secured at 65 ° C. or higher. As a result, the follow-up operation can be performed under wide conditions against the recovery fluctuation of the heat source. The start-up time is shortened to about 10 minutes and the stop time is shortened to about 15 minutes, and it becomes possible to supply cold water in accordance with the operation period of the printing press 11.
なお、本発明の実施の形態は上記実施形態に何ら限定されるものではなく、本発明は、その技術的思想を逸脱しない範囲において、当該技術的範囲に属する限り種々の改変等の形態を採り得る。 The embodiment of the present invention is not limited to the above-described embodiment, and the present invention can be applied to various modifications and the like within the technical scope without departing from the technical concept thereof. obtain.
例えば、上記実施形態では、冷凍機として吸着式冷凍機を採用したが、これに代えて、吸収式冷凍機を採用してもよい。また、オフセット輪転印刷機が湿式印刷方式である場合、印刷機は、湿し水を冷却するための恒温装置を備えており、この恒温装置における湿し水の冷却のために冷水循環配管が使用されてもよい。１組のオフセット輪転印刷機につき、一対一で設けられた、熱風乾燥機１３、脱臭装置４及び排気温水熱交換器６としたが、一対複数で設けても良い。複数組のオフセット輪転印刷機につき、熱風乾燥機１３、脱臭装置４及び排気温水熱交換器６の１組を対応させて設けても良い。 For example, in the above-mentioned embodiment, although the adsorption type refrigerator was adopted as a refrigerator, it may replace with this and may adopt an absorption type refrigerator. In addition, when the offset rotary printing press is a wet printing method, the printing press is provided with a thermostatic device for cooling dampening water, and a cold water circulation pipe is used for cooling the dampening liquid in this thermostatic device It may be done. Although it was set as the hot-air dryer 13, the deodorizing apparatus 4, and the exhaust_gas | exhaustion warm water heat exchanger 6 provided by one-to-one per 1 set of offset rotary printing machines, you may provide by one or more. One set of the hot air drier 13, the deodorizing device 4 and the exhaust water heat exchanger 6 may be provided correspondingly to the plurality of sets of the offset rotary printing press.
Ｗ ウェブ
１ 排熱回収利用システム
２ オフセット輪転印刷機
４ 脱臭装置
６ 排気温水熱交換器
８ 冷凍機
１１ 印刷機
１２ 印刷ユニット
１３ 熱風乾燥機
１４ 搬送経路
１５ 冷却装置
１６ 乾燥室
１７ 熱風供給路
１８ 吸込口
１９ 送風口
２１ 送風機
２３ 加熱装置
２４ 導入口
２５ 開口部
２６ ノズル
２７ 排気口
２８ 排気ファン
３１ 受熱通路
３２ 放熱通路
３３ 排気予熱用熱交換器
３４ 予熱装置
３５ 酸化触媒
３６ 返送ダクト
３７ 排気ダクト
６１ 並行流型熱交換器
６２ 放熱フィン
６４ 冷媒管
６６ 冷水導管
６７ 温水導管
６８ フランジ構造
５１ チルローラ
５２ ガイドローラ
９１ 温水循環配管
９２、９３，９４、９７、１００ 配管
９５ 温水タンク
９６ 一次温水ポンプ
９８ 二次温水ポンプ
W Web 1 Waste heat recovery and utilization system 2 Offset rotary printing press 4 Deodorizing device 6 Exhaust hot water heat exchanger 8 Refrigerator 11 Printing machine 12 Printing unit 13 Hot air dryer 14 Conveying path 15 Cooling device 16 Drying chamber 17 Hot air supply path 18 Suction Port 19 Blower 21 Blower 23 Heating device 24 Inlet 25 Opening 26 Nozzle 27 Exhaust 28 Exhaust fan 31 Heat receiving passage 32 Heat radiating passage 33 Heat exchanger for exhaust preheating 34 Preheating device 35 Oxidation catalyst 36 Return duct 37 Exhaust duct 61 Parallel Flow type heat exchanger 62 Heat dissipation fin 64 Refrigerant pipe 66 Cold water pipe 67 Hot water pipe 68 Flange structure 51 Chill roller 52 Guide roller 91 Hot water circulation piping 92, 93, 94, 97, 100 Piping 95 Hot water tank 96 Primary hot water pump 98 Secondary hot water pump
Claims (3)
前記熱風乾燥機は、ウェブの搬送経路を開口した箱型の乾燥室内に、前記ウェブの搬送経路を挟んで上下所定の間隔を開けて配置された熱風供給路と、吸込口及び送風口を前記乾燥室内に開放した送風機と、該送風機の送風口から送られた熱気を加熱して前記熱風供給路に誘導する加熱装置とで構成されており、前記熱風供給路は、前記加熱装置で加熱された熱気を導入する導入口と、前記ウェブの搬送経路に面した開口部から熱風を噴射するノズルとを有し、
前記乾燥室には排気口が設けられており、該排気口が排気ファンと接続し、前記排気ファンは、排気予熱用熱交換器と接続し、排気を送っており、該排気口を起点として前記熱風乾燥機から排出される熱風の流路上には、前記排気ファン、互いに接触する受熱通路及び放熱通路を有する前記排気予熱用熱交換器、及び前記脱臭装置が直列に接続され、
前記脱臭装置の下流には返送ダクトが取り付けられ、該返送ダクトから排気ダクトが分岐し、前記排気ダクトは前記排気予熱用熱交換器の前記放熱通路に接続し、該放熱通路の下流側には、前記排気温水熱交換器が接続し、
前記返送ダクトから分岐したバイパスダクトを介して前記ノズルに熱風を還流させ、
前記排気温水熱交換器における熱交換で得られた温水を熱源として冷水を製造する冷凍機を備え、前記排気温水熱交換器は、熱風の流路上に脱着可能な状態で設けられたアルミニウム製又はアルミニウム合金製並行流型熱交換器を含み、
前記排気温水熱交換器は、前記脱臭装置から排出される熱風の流路上に並行流が形成されるよう複数のアルミニウム製又はアルミニウム合金製並行流型熱交換器を対向配置して構成しており、前記アルミニウム製又はアルミニウム合金製並行流型熱交換器の間隔は、上流側が狭く下流に向かうにつれて広がっており、前記アルミニウム製又はアルミニウム合金製並行流型熱交換器が交換可能な構造であり、
前記排気温水熱交換器は、１組のオフセット輪転印刷機につき、一対一で対応するように設けられ、
前記アルミニウム製又はアルミニウム合金製並行流型熱交換器は、放熱フィンと、内部に複数の並行流路を形成した冷媒管と、該冷媒管と連通する冷水導管および温水導管とを備え、
前記冷水導管および前記温水導管は、前記冷媒管に対して直交するように該冷媒管の両側に設けられ、
前記冷水導管および前記温水導管の同じ側の端部にフランジ構造が設けられているオフセット輪転印刷機の排熱回収利用システム。 In a set of exhaust heat recovery utilization systems of a rotary offset printing press including a printing press, a hot air dryer, a deodorizing apparatus having a preheating apparatus, and a cooling apparatus along a web conveying direction,
The hot-air drier includes a hot-air supply path, a suction port, and a blower opening, which are disposed at predetermined intervals above and below the web transfer path in a box-shaped drying chamber in which the web transfer path is opened. It comprises: a blower opened in the drying chamber; and a heating device for heating the hot air sent from the blower of the blower and guiding it to the hot air supply passage, and the hot air supply passage is heated by the heating device. And an inlet for introducing hot air, and a nozzle for injecting hot air from an opening facing the transport path of the web,
Wherein the drying chamber is provided an exhaust port, exhaust port connected to an exhaust fan, the exhaust fan is connected to the exhaust preheating heat exchanger, and send the exhaust, starting from the exhaust port wherein the flow path of the hot air discharged from hot air dryer, the exhaust fan, the exhaust preheating heat exchanger having a heat receiving path and the heat radiation path in contact with each other, and said deodorizing apparatus are connected in series as,
The deodorizing device downstream is being returned duct mounting of branches exhaust duct from the return duct, the exhaust duct is connected to the heat release path of the exhaust preheating heat exchanger, downstream of the heat radiation passage the, before Symbol exhaust hot water heat exchanger is connected,
Hot air is returned to the nozzle via a bypass duct branched from the return duct;
The exhaust hot water heat exchanger is provided with a refrigerator that produces cold water using hot water obtained by heat exchange in the exhaust hot water heat exchanger as a heat source, and the exhaust hot water heat exchanger is made of aluminum or provided in a removable state on a hot air flow path Includes aluminum alloy co-flow heat exchanger,
The exhaust hot water heat exchanger is configured by opposingly arranging a plurality of aluminum or aluminum alloy parallel flow heat exchangers so that a parallel flow is formed on the flow path of the hot air discharged from the deodorizing device. The interval between the aluminum or aluminum alloy parallel flow heat exchangers narrows on the upstream side toward the downstream, and the aluminum or aluminum alloy parallel flow heat exchangers can be replaced.
The exhaust hot water heat exchanger is provided in a one-to-one correspondence with one set of the offset rotary printing press,
The aluminum or aluminum alloy parallel flow type heat exchanger includes heat dissipating fins, a refrigerant pipe in which a plurality of parallel flow paths are formed inside, and a cold water pipe and a hot water pipe communicating with the refrigerant pipe,
The cold water pipe and the hot water pipe are provided on both sides of the refrigerant pipe so as to be orthogonal to the refrigerant pipe,
A system for exhaust heat recovery of an offset rotary printing press, wherein a flange structure is provided at the same side end of the cold water pipe and the hot water pipe.
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| JP6132217B2 (en) * | 2015-09-10 | 2017-05-24 | ニッカ株式会社 | Printing machine drying equipment |
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| JPS52109478A (en) * | 1976-03-10 | 1977-09-13 | Mitsubishi Electric Corp | Recovering apparatus for organic solvent gas in dryer |
| JPS58133578A (en) * | 1982-02-03 | 1983-08-09 | 株式会社日立製作所 | Heat exchanger unit of air conditioner |
| JPS61251009A (en) * | 1985-04-29 | 1986-11-08 | Mitsubishi Electric Corp | Cooling device |
| JPH087259Y2 (en) * | 1992-02-28 | 1996-03-04 | オフセットプリンティングシステム株式会社 | Cold water production equipment for cooling rollers of offset rotary printing press |
| JP3049499U (en) * | 1997-12-04 | 1998-06-09 | 株式会社関電工 | Waste heat recovery and reuse system for offset rotary presses |
| JP2002337309A (en) * | 2001-05-15 | 2002-11-27 | Asahi Kosoku Insatsu Kk | Printing apparatus |
| JP2005069536A (en) * | 2003-08-22 | 2005-03-17 | Osaka Gas Co Ltd | Waste heat recovery type adsorption type freezer |
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