JP2009100666A - Leaf tobacco dryer for energy-saving type, and method for controlling leaf tobacco drying - Google Patents

Leaf tobacco dryer for energy-saving type, and method for controlling leaf tobacco drying Download PDF

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JP2009100666A
JP2009100666A JP2007274195A JP2007274195A JP2009100666A JP 2009100666 A JP2009100666 A JP 2009100666A JP 2007274195 A JP2007274195 A JP 2007274195A JP 2007274195 A JP2007274195 A JP 2007274195A JP 2009100666 A JP2009100666 A JP 2009100666A
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JP5137525B2 (en
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Daisuke Aritome
Masanori Nishida
Hidefumi Shikakura
大介 有留
正徳 西田
秀文 鹿倉
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Sanshu Sangyo Co Ltd
三州産業株式会社
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    • YGENERAL 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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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a leaf tobacco dryer of energy-saving type that levels and equalizes the temperature and humidity in a drying chamber, stabilize drying operation control, improves the qualities of dried leaves and reduces the fuel consumption. <P>SOLUTION: The leaf tobacco dryer of energy-saving type has a constitution such that a waste heat recovery part 14 for recovering an exhaust heat from the exhaust outlet 13 of the leaf tobacco drying chamber 3 and heating open air (In), which is sucked from an air inlet 11, is installed in a hot air generator 2; a far-infrared radiation plate 24 for receiving a radiant heat from a furnace 6 and radiating a far-infrared radiation is arranged between the furnace and the lower part of the leaf tobacco drying chamber 3; and during a leaf tobacco drying operation, dried mixed air that is mixed air of the heated open air (In) and ventilation air and reheated by the furnace 6, and a far-infrared radiation radiated from the heat-accumulated far-infrared radiating plate 24 are supplied simultaneously to the leaf tobacco drying chamber 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、熱風発生装置で生成された高温の乾燥空気を乾燥室内に吹き上げて乾燥室内の葉たばこを乾燥させる省エネ型葉たばこ乾燥機と、葉たばこ乾燥制御方法に関する。   The present invention relates to an energy-saving leaf tobacco dryer that blows high-temperature dry air generated by a hot air generator into a drying chamber to dry leaf tobacco in the drying chamber, and a leaf tobacco drying control method.
従来一般の葉たばこ乾燥機において、葉たばこ乾燥運転中の熱効率は約50%程度であり、残りは熱損失として、火炉から続く外部煙突から15%、乾燥室の排気口から35%がそれぞれ外部に排熱されている。運転中は、乾燥室の排気口からは乾燥室内の湿潤空気の一部を排出し、吸気口からは排出量に見合う量の外気を吸入して、乾燥室内の温度および湿度をコントロールしている。近年、原油の高騰によって、葉たばこ乾燥機の運転に用いる燃料コストが上昇しており、熱量の損失を減らし、熱効率をアップさせることが大きな課題となっている。   In a conventional leaf tobacco dryer, the thermal efficiency during leaf tobacco drying operation is about 50%, and the remainder is about 15% from the external chimney that continues from the furnace and 35% from the exhaust outlet of the drying chamber. It is heated. During operation, a part of the humid air in the drying chamber is exhausted from the exhaust port of the drying chamber, and the amount of outside air corresponding to the exhaust amount is inhaled from the intake port to control the temperature and humidity in the drying chamber. . In recent years, due to soaring crude oil, the cost of fuel used to operate leaf tobacco dryers has increased, and it has become a major issue to reduce heat loss and increase thermal efficiency.
従来、乾燥室の排気口から排出された排気熱を回収して葉たばこ乾燥に利用する装置が種々提案されている(特許文献1、特許文献2を参照)。   Conventionally, various apparatuses for recovering exhaust heat discharged from an exhaust port of a drying chamber and utilizing it for leaf tobacco drying have been proposed (see Patent Document 1 and Patent Document 2).
実開昭55−5044号公報Japanese Utility Model Publication No. 55-5044 実開昭56−90691号公報Japanese Utility Model Publication No. 56-90691
これらの装置は熱効率の改善に一定の効果を奏するものの、燃料コストの上昇から、さらなる熱効率の改善が要求されている。一方、湿潤空気の循環と吸気口からの外気の吸入においては、これらの混合空気が不均衡のまま乾燥室に供給され、乾燥室内の温度および湿度が十分に平準化されていないのが現状である。   Although these devices have a certain effect on the improvement of thermal efficiency, further improvement in thermal efficiency is required due to an increase in fuel cost. On the other hand, in the circulation of wet air and the intake of outside air from the intake port, the mixed air is supplied to the drying chamber without being balanced, and the temperature and humidity in the drying chamber are not sufficiently leveled. is there.
乾燥室の温度および湿度が十分に平準化されないと、乾燥運転制御の不安定、燃料消費量の悪化、乾燥品質のばらつきといった問題を引き起こす。   If the temperature and humidity in the drying chamber are not leveled sufficiently, problems such as instability in drying operation control, deterioration in fuel consumption, and variation in drying quality are caused.
本発明は上記課題に鑑みてなされたもので、乾燥室内の温度および湿度の平準化を図り、乾燥運転制御の安定と、乾燥葉の品質向上を図り、併せて、燃料消費の削減を図ることのできる省エネ型葉たばこ乾燥機と葉たばこ乾燥制御方法を提供することを目的とする。   The present invention has been made in view of the above problems, and aims to level the temperature and humidity in the drying chamber, to stabilize the drying operation control, to improve the quality of the dried leaves, and to reduce fuel consumption. The purpose is to provide an energy-saving leaf tobacco dryer and a leaf tobacco drying control method.
上記課題を解決するために、本発明に係る請求項1の省エネ型葉たばこ乾燥機は、
循環空気および/または吸気口から吸入した外気を火炉によって加熱し、高温の乾燥空気を生成する熱風発生装置と、熱風発生装置に連設され、高温の乾燥空気を下部から吹き上げる葉たばこ乾燥室とを備える葉たばこ乾燥装置において、
前記熱風発生機内に、葉たばこ乾燥室の排気口からの排気熱を回収し、吸気口から吸入した外気を加温する排熱回収部を設け、
前記火炉と葉たばこ乾燥室の下部との間に、火炉からの輻射熱を受熱して遠赤外線を放射する遠赤外線放射部を配置し、
葉たばこ乾燥運転中に、加温された外気と循環空気の混合空気であって、火炉によって再加熱された乾燥混合空気と、蓄熱された遠赤外線放射部から放射される遠赤外線とを同時に葉たばこ乾燥室に供給する構成であることを特徴とする。
In order to solve the above-described problem, an energy-saving leaf tobacco dryer according to claim 1 of the present invention comprises:
A hot air generator that heats the circulating air and / or outside air drawn from the air inlet with a furnace to generate hot dry air, and a leaf tobacco drying chamber that is connected to the hot air generator and blows hot dry air from below. In the leaf tobacco drying device provided,
In the hot air generator, an exhaust heat recovery unit that recovers exhaust heat from the exhaust port of the tobacco drying chamber and heats the outside air sucked from the intake port is provided,
Between the furnace and the lower part of the tobacco drying chamber, a far-infrared radiation part that receives radiant heat from the furnace and emits far-infrared radiation is disposed,
During the leaf tobacco drying operation, the mixture of heated outside air and circulating air, which is reheated by the furnace and the far-infrared radiation emitted from the stored far-infrared radiation section, is dried at the same time. It is the structure supplied to a chamber, It is characterized by the above-mentioned.
葉たばこ乾燥運転中に、葉たばこ乾燥室の排気口から排気される湿潤空気の排気熱が、排熱回収部に回収され、吸気口に吸入された外気と熱交換され、速やかに加温された外気が乾燥室からの循環空気と混合され、熱バランスが改善された混合空気となって、火炉によって再加熱される。   During the leaf tobacco drying operation, the exhaust heat of the humid air exhausted from the exhaust outlet of the leaf tobacco drying chamber is recovered by the exhaust heat recovery unit, exchanged heat with the outside air sucked into the intake port, and quickly heated. Is mixed with the circulating air from the drying chamber, becomes a mixed air with improved heat balance, and is reheated by the furnace.
一方、火炉からの輻射熱が火炉と乾燥室の間に配置された遠赤外線放射部に蓄熱される。蓄熱された遠赤外線放射部からは、乾燥運転中、常時、多量の遠赤外線が安定的に放射される。遠赤外線は、火炉によって再加熱された混合空気を再び加温し、遠赤外線の加温によって混合空気の熱バランスがさらに改善される。多量の安定した遠赤外線の放射によって、乾燥室内に供給される混合空気の熱バランスがより平衡になる。   On the other hand, radiant heat from the furnace is stored in a far-infrared radiation part disposed between the furnace and the drying chamber. A large amount of far-infrared radiation is stably emitted from the stored far-infrared radiation section at all times during the drying operation. The far infrared rays reheat the mixed air reheated by the furnace, and the heat balance of the mixed air is further improved by heating the far infrared rays. A large amount of stable far-infrared radiation makes the thermal balance of the mixed air supplied into the drying chamber more balanced.
乾燥室内には安定した熱バランスの乾燥温風が供給される。このため、乾燥室内の温度および湿度が平準化される。乾燥に供された後の湿潤空気は、循環口から大部分が熱風発生装置内に戻され、加温された外気と再び混合される。熱風発生装置内の熱バランスと乾燥室内の熱バランスが平衡になるので、温度制御が大幅に改善され、乾燥運転制御が安定する。   Dry hot air with a stable heat balance is supplied into the drying chamber. For this reason, the temperature and humidity in the drying chamber are leveled. Most of the humid air that has been subjected to drying is returned from the circulation port into the hot air generator and is mixed again with the warmed outside air. Since the heat balance in the hot air generator and the heat balance in the drying chamber are balanced, the temperature control is greatly improved and the drying operation control is stabilized.
また、吸気ダンパおよび排湿ダンパの動作も安定するため、乾燥室内の温度および湿度の変動幅が小さく、このため、葉たばこの葉温が安定し、ストレスのない安定的な脱水効果が生まれる。これにより、乾燥葉の品質のばらつきがなくなる。   In addition, since the operations of the intake damper and the exhaust damper are also stable, the fluctuation range of the temperature and humidity in the drying chamber is small, so that the leaf temperature of the leaf tobacco is stable, and a stable dehydration effect without stress is produced. This eliminates variations in dry leaf quality.
遠赤外線放射部は、請求項2の記載のごとく、その主成分がシラスバルーンおよび粒状のトルマリン石から構成されることが望ましい。シラスバルーンおよび粒状のトルマリン石は、熱容量が大きく大量の熱を蓄熱できると共に、比較的低温(表面温度約50〜55℃付近)で多量の遠赤外線を安定して放射し、熱バランスの改善に大きく寄与する。   As described in claim 2, the far-infrared radiation part is preferably composed of shirasu balloon and granular tourmaline stone. Shirasu balloons and granular tourmaline stones have a large heat capacity and can store a large amount of heat, and stably emit a large amount of far-infrared rays at a relatively low temperature (surface temperature of about 50 to 55 ° C) to improve the heat balance. A big contribution.
遠赤外線放射部から放射される遠赤外線は、乾燥室にも放射される。乾燥室内の葉たばこは、乾燥される間、遠赤外線を吸収し、乾燥葉が明るく、鮮明に仕上がる。これにより、乾燥葉の仕上りの外観性状の品質が向上する。また、廃棄葉が減少し、乾燥葉の歩留り率が向上する。   Far-infrared rays radiated from the far-infrared radiation part are also radiated to the drying chamber. Tobacco leaves in the drying chamber absorb far-infrared rays while being dried, and the dried leaves are bright and clear. Thereby, the quality of the appearance characteristics of the finish of the dried leaf is improved. In addition, the number of discarded leaves is reduced, and the yield rate of dried leaves is improved.
本発明に係る請求項3の葉たばこ乾燥機は、遠赤外線放射部が、粒径1mm〜8mmのシラスバルーンを35〜55重量%、粒径50〜300ミクロンのシラスバルーンを3〜15重量%、粒状のトルマリン石を1〜10重量%にして配合し、ケイ酸ナトリウム及びアルミナセメントにより凝固させて板状に成形されていることを特徴とする。   In the leaf tobacco dryer according to claim 3 of the present invention, the far-infrared radiation part has a shirasu balloon with a particle diameter of 1 to 8 mm in an amount of 35 to 55% by weight, a shirasu balloon with a particle diameter of 50 to 300 microns in an amount of 3 to 15% by weight, A granular tourmaline stone is blended in an amount of 1 to 10% by weight, solidified with sodium silicate and alumina cement, and formed into a plate shape.
乾燥室の下部ピットの形状に合わせて所定の形状に焼結成形して、火炉の下方に安定して設置することができる。   It can be sintered in a predetermined shape according to the shape of the lower pit of the drying chamber and can be stably installed below the furnace.
本発明に係る請求項4記載の葉たばこ乾燥機は、火炉の外面に遠赤外線塗料を塗布したことを特徴とする。   The leaf tobacco dryer according to claim 4 of the present invention is characterized in that a far-infrared paint is applied to the outer surface of a furnace.
葉たばこ乾燥運転中、火炉の表面熱によって遠赤外線塗料から遠赤外線を常時安定的に放射させ、熱風発生装置内の混合空気を加温し、熱風発生装置内の熱バランスの改善に寄与する。   During the leaf tobacco drying operation, far-infrared rays are always stably emitted from the far-infrared paint by the surface heat of the furnace, and the mixed air in the hot-air generator is heated to contribute to the improvement of the heat balance in the hot-air generator.
本発明に係る請求項5記載の葉たばこ乾燥機は、火炉から外部煙突に続く内部排気通路内にスクリュー板を挿入配置したことを特徴とする。   The leaf tobacco dryer according to claim 5 of the present invention is characterized in that a screw plate is inserted and disposed in an internal exhaust passage from the furnace to the external chimney.
火炉から外部煙突に続く内部排気通路内にスクリュー板を挿入配置することによって、外部煙突から排気される排気熱を熱風発生装置内に回収し、回収した排気熱によって、熱風発生装置内の熱バランスの改善に寄与することができる。   By inserting and arranging a screw plate in the internal exhaust passage from the furnace to the external chimney, the exhaust heat exhausted from the external chimney is recovered in the hot air generator, and the recovered exhaust heat is used to balance the heat in the hot air generator. It can contribute to improvement.
本発明に係る請求項6記載の葉たばこ乾燥機は、火炉から外部煙突に続く内部排気通路の管体外面に排熱回収フィンを設けたことを特徴とする。   The leaf tobacco dryer according to claim 6 of the present invention is characterized in that exhaust heat recovery fins are provided on the outer surface of the tubular body of the internal exhaust passage that extends from the furnace to the external chimney.
火炉から外部煙突に続く内部排気通路内の管体外面に排熱回収フィンを設けることによって、外部煙突から排気される排気熱を熱風発生装置内に回収し、回収した排気熱によって、熱風発生装置内の熱バランスの改善に寄与することができる。   By providing exhaust heat recovery fins on the outer surface of the tube in the internal exhaust passage from the furnace to the external chimney, the exhaust heat exhausted from the external chimney is recovered in the hot air generator, and the recovered exhaust heat generates a hot air generator. It can contribute to the improvement of the heat balance.
本発明に係る請求項7記載の葉たばこ乾燥制御方法は、請求項1記載の葉たばこ乾燥機を用いた葉たばこ乾燥制御方法であって、熱風発生装置の火炉に用いられるバーナーについて、乾燥室内に設置した温度センサーに従い、下限値および上限値の二位置で燃焼と停止を動作制御し、その燃焼と停止の動作の周期を8分以上、12分以下になるように制御することを特徴とする。   A leaf tobacco drying control method according to claim 7 of the present invention is a leaf tobacco drying control method using the leaf tobacco dryer according to claim 1, wherein a burner used in a furnace of a hot air generator is installed in a drying chamber. According to the temperature sensor, the combustion and stop operations are controlled at two positions of a lower limit value and an upper limit value, and the cycle of the combustion and stop operations is controlled to be 8 minutes or more and 12 minutes or less.
バーナーの二位置動作制御においては、温度センサー(例えば乾球温度)の設定値を下限値とし、下限値でバーナーを着火燃焼させる。上限値は例えば下限値+1℃とし、上限値で停止するように温度制御する。   In the two-position operation control of the burner, the set value of the temperature sensor (for example, dry bulb temperature) is set as the lower limit value, and the burner is ignited and burned at the lower limit value. The upper limit value is, for example, the lower limit value + 1 ° C., and the temperature is controlled so as to stop at the upper limit value.
本発明の葉たばこ乾燥制御方法によれば、循環空気と外気の混合空気が排熱回収部と遠赤外線放射部の相乗作用効果によって、極めて安定した熱バランスとなり、温度制御性がよくなる。このため、バーナーの制御性とダンパの開閉制御性がともに安定し、乾燥室内の温度・湿度が平準化される。熱バランスが良くなると、従来に比べてバーナーの燃焼および停止の動作の周期が8分から12分と長くなり、運転(燃焼)回数が減少する。また、排湿ダンパ、吸気ダンパの動作が安定し、これらの作用が乾燥室内の温度および湿度のより一層の平準化をもたらす。   According to the leaf tobacco drying control method of the present invention, the mixed air of the circulating air and the outside air has a very stable heat balance due to the synergistic effect of the exhaust heat recovery unit and the far infrared radiation unit, and the temperature controllability is improved. For this reason, both the controllability of the burner and the open / close controllability of the damper are stabilized, and the temperature and humidity in the drying chamber are leveled. When the heat balance is improved, the burner combustion and stop operation cycle becomes longer from 8 minutes to 12 minutes as compared with the prior art, and the number of operations (combustion) decreases. Further, the operations of the exhaust damper and the intake damper are stabilized, and these actions bring about further leveling of the temperature and humidity in the drying chamber.
熱バランスの安定により、バーナー停止後のオーバーシュートおよびバーナー運転後のアンダーシュートの間の制御幅を2℃以下に保持することが可能となって、熱風発生装置から乾燥室に向かう温風のボリュームの変動幅が小さくなり、これにより乾燥室下部(の整流板)からの通風速度が安定し、乾燥室内の変流や縮流の発生を防ぎ、安定した乾燥を行うことができる。   The stability of the heat balance makes it possible to keep the control range between the overshoot after the burner stops and the undershoot after the burner operation at 2 ° C. or less, and the volume of hot air from the hot air generator toward the drying chamber As a result, the speed of ventilation from the lower part of the drying chamber (the current plate) is stabilized, and it is possible to prevent the occurrence of current transformation and contraction in the drying chamber and to perform stable drying.
乾燥時間の短縮を期待することができ、また、バーナーの制御幅を2℃以下に保持することが可能であり、従来の階段昇温式の制御方法に替えて、リニアに昇温する制御方法を採用することも可能である。   A control method that can be expected to shorten the drying time and can maintain the control range of the burner at 2 ° C. or lower, and linearly raises the temperature in place of the conventional staircase temperature raising type control method. It is also possible to adopt.
以上説明したように、本発明に係る省エネ型葉たばこ乾燥機によると、熱風発生装置内における循環空気と外気の混合空気の熱バランスを大幅に改善して、安定した乾燥温風を乾燥室内に供給することができ、これによって、乾燥室内の温度および湿度の平準化が図れ、安定した葉たばこ乾燥の運転制御を行うことができる。
これにより、乾燥葉の品質を良好にし、併せて、燃料消費の削減を図ることができる効果を奏する。
また、本発明に係る葉たばこ乾燥制御方法によれば、バーナーの燃焼および停止の動作の周期を長期化することによって、運転回数を減少させ、燃料消費の削減を図ることができる。
As described above, according to the energy-saving leaf tobacco dryer according to the present invention, the heat balance of the mixed air of the circulating air and the outside air in the hot air generator is greatly improved, and stable dry hot air is supplied into the drying chamber. Accordingly, the temperature and humidity in the drying chamber can be leveled, and stable operation control of leaf tobacco drying can be performed.
Thereby, there is an effect that the quality of the dried leaf can be improved and the fuel consumption can be reduced.
Further, according to the leaf tobacco drying control method according to the present invention, the number of operations can be reduced and fuel consumption can be reduced by extending the period of the burner combustion and stop operations.
本発明を実施するための最良の形態を図面を参照して説明する。図1において、符号1は省エネ型葉たばこ乾燥機、符号2は熱風発生装置、符号3は乾燥室である。   The best mode for carrying out the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 is an energy-saving leaf tobacco dryer, reference numeral 2 is a hot air generator, and reference numeral 3 is a drying chamber.
まず、熱風発生装置2を概略説明すると、図1に示すように、ケーシング4の左半分には下部にバーナー5を備える火炉6と、火炉6に連絡する熱交換器7が配置され、その上部には送風機8が配置されている。ケーシング4の左半分の外部には図示しない制御盤と、熱交換器7から内部排気通路9を介して連通する煙突10が取り付けられている。   First, the hot air generator 2 will be schematically described. As shown in FIG. 1, a furnace 6 having a burner 5 in the lower part and a heat exchanger 7 connected to the furnace 6 are arranged in the left half of the casing 4. An air blower 8 is arranged in the case. A control panel (not shown) and a chimney 10 communicating from the heat exchanger 7 via the internal exhaust passage 9 are attached to the outside of the left half of the casing 4.
ケーシング4の右半分には下部側方に吸気口11を備える吸気ダクト12が組み込まれている。この吸気ダクト12はケーシング4内で上向きに延びるとともに、ケーシング4の内部天井付近から送風機8の上方に達して開口し、排湿にしたがい、吸気口11から吸入された外気Inが吸気ダクト12内をケーシング4の内部天井付近に案内され、送風機8の上方から送風機8によって火炉6へ向けて下方に吸い込まれるようになっている。   The right half of the casing 4 incorporates an intake duct 12 having an intake port 11 on the lower side. The intake duct 12 extends upward in the casing 4, opens from the vicinity of the inner ceiling of the casing 4 to the upper side of the blower 8, and exhausts the outside air In taken in from the intake port 11 in accordance with the exhaust. Is guided to the vicinity of the inner ceiling of the casing 4 and is sucked downward from the upper side of the blower 8 toward the furnace 6 by the blower 8.
また、吸気ダクト12には、乾燥室3の排気口13から排気される排気熱を回収する排熱回収部14が組み込まれている。この排熱回収部14において回収された排気熱は、吸気口11から吸気ダクト12内に吸入された外気Inとの熱交換に用いられる。   In addition, the intake duct 12 incorporates an exhaust heat recovery unit 14 that recovers exhaust heat exhausted from the exhaust port 13 of the drying chamber 3. The exhaust heat recovered in the exhaust heat recovery unit 14 is used for heat exchange with the outside air In drawn into the intake duct 12 from the intake port 11.
排熱回収部14は、具体的には、図2および図3を参照して、吸気ダクト12内を上方に外気Inが通過する複数の外気流通路15,15・・・と、排気口11から排気の流通方向に排気Exが通過する複数の排気流通路16,16・・・とが、交互にアルミ泊などの熱良導性薄板17によって区割形成されている。アルミ泊などの熱良導性薄板17は、図3に示すように、波形成型によって、熱交換効率をアップすることができる。排気口13から排出される排気は排熱回収部14の排気流通路16,16・・・を通過して外部に排出され、吸気口11から吸気ダクト12内に吸入される外気は前記排熱回収部14の外気流通路15,15・・・を通過してケーシング4の天井付近から向きを変え、送風機8によって火炉6へ送り込まれる。その間、排気流通路16,16・・・を通過する排気と、外気流通路15,15・・・を通過する外気との間で熱交換され、外気が+10〜15℃に加温される。   Specifically, referring to FIGS. 2 and 3, the exhaust heat recovery unit 14 includes a plurality of external airflow passages 15, 15... Through which the outside air In passes upward in the intake duct 12 and the exhaust port 11. A plurality of exhaust flow passages 16, 16... Through which the exhaust Ex passes in the exhaust flow direction are alternately divided by thermally conductive thin plates 17 such as aluminum stays. As shown in FIG. 3, the heat conductive thin plate 17 such as an aluminum stay can improve the heat exchange efficiency by corrugation. Exhaust gas discharged from the exhaust port 13 passes through the exhaust flow passages 16, 16,... Of the exhaust heat recovery unit 14 and is discharged to the outside, and the outside air sucked into the intake duct 12 from the intake port 11 is the exhaust heat. .. Passes through the external airflow passages 15, 15... Of the recovery unit 14, changes direction from the vicinity of the ceiling of the casing 4, and is sent to the furnace 6 by the blower 8. In the meantime, heat exchange is performed between the exhaust gas passing through the exhaust air flow passages 16, 16... And the external air passing through the external air flow passages 15, 15..., And the external air is heated to +10 to 15 ° C.
なお、吸気口11および排気口13の前方出口には、それぞれ吸気ダンパ18および排湿ダンパ19が設けられている。   Note that an intake damper 18 and a moisture exhaust damper 19 are provided at the front outlets of the intake port 11 and the exhaust port 13, respectively.
以上のように構成された熱風発生装置2によれば、吸気口11から吸入された外気Inが排熱回収部14によって速やかに加温されることにより、同外気と、乾燥室3の循環口20から循環された湿潤空気との混合空気の熱バランスが改善される。送風機8は、通常のファンでもよいが、排熱回収部15における吸・排気抵抗を鑑みて、図1に示すような静圧のとれる多翼型送風機(シロッコファン)を採用してもよい。排熱回収部14によって排気口13からの損失熱量35%のうち、最大25%を熱風発生装置2内に回収することが可能である。   According to the hot air generator 2 configured as described above, the outside air In taken in from the intake port 11 is quickly heated by the exhaust heat recovery unit 14, so that the outside air and the circulation port of the drying chamber 3 are heated. The heat balance of the mixed air with the humid air circulated from 20 is improved. The blower 8 may be a normal fan, but a multi-blade blower (sirocco fan) capable of taking static pressure as shown in FIG. The exhaust heat recovery unit 14 can recover a maximum of 25% of the heat loss 35% from the exhaust port 13 in the hot air generator 2.
熱交換器7の内部および同熱交換器7から続く内部排気通路9内には、それぞれ、図2に示すように、その内部を通過する排気Exを螺旋状に案内するスクリュー板21,21が挿入配置されている。各スクリュー板21の配置によって排気ガスが熱交換器7内および内部排気通路9内に滞留する時間が長くなり、排気熱を熱風発生装置2内に回収することができる。同じく、内部排気通路9の管体外面には、複数枚の排熱回収フィン22が取り付けられている。これらのスクリュー板21および排熱回収フィン22によって、煙突10から外部に放出される損失熱量15%のうち、最大10%程度を回収することが可能である。   As shown in FIG. 2, screw plates 21 and 21 that guide the exhaust Ex passing through the inside of the heat exchanger 7 and the internal exhaust passage 9 continuing from the heat exchanger 7 are respectively provided. Insertion is arranged. The arrangement of the screw plates 21 increases the time during which the exhaust gas stays in the heat exchanger 7 and the internal exhaust passage 9, and the exhaust heat can be recovered in the hot air generator 2. Similarly, a plurality of exhaust heat recovery fins 22 are attached to the outer surface of the tubular body of the internal exhaust passage 9. The screw plate 21 and the exhaust heat recovery fin 22 can recover a maximum of about 10% of the heat loss 15% released from the chimney 10 to the outside.
下部ピット23には、火炉6の近傍に位置する遠赤外線放射板(遠赤外線放射部)24が配置されている。遠赤外線放射板24は、シラスバルーンと粒状のトルマリン石を主体とし、より具体的には、粒径1mm〜8mmのシラスバルーンを35〜55重量%、粒径50〜300ミクロンのシラスバルーンを3〜15重量%、粒状のトルマリン石を1〜10重量%にして配合し、ケイ酸ナトリウムおよびアルミナセメントにより凝固させてプレート状に形成したものである。上面に凹凸を形成して、表面積を拡大し、より多量の遠赤外線を放出するようにしてもよい。   A far-infrared radiation plate (far-infrared radiation part) 24 located in the vicinity of the furnace 6 is disposed in the lower pit 23. The far-infrared radiation plate 24 is mainly composed of a shirasu balloon and granular tourmaline stone. More specifically, the shirasu balloon having a particle diameter of 1 to 8 mm is 35 to 55% by weight, and a shirasu balloon having a particle diameter of 50 to 300 microns is 3 -15% by weight, 1 to 10% by weight of granular tourmaline stone, and solidified with sodium silicate and alumina cement to form a plate. Concavities and convexities may be formed on the upper surface to increase the surface area and emit a larger amount of far infrared rays.
乾燥室3は、箱型のコンテナ25の内部に、図4および図5に示すように、葉たばこ(生葉)26を葉詰めした吊具27を上下2段にわたり吊り込み、下部ピット23から整流板28を通して吹き上げられる乾燥温風によって葉たばこ26を乾燥させるようになっている。   As shown in FIGS. 4 and 5, the drying chamber 3 suspends a hanging tool 27 stuffed with leaf tobacco (raw leaves) 26 in two upper and lower stages inside a box-shaped container 25, and a current plate from the lower pit 23. The leaf tobacco 26 is dried by the dry hot air blown through 28.
乾燥室3の整流板28付近には、熱風発生装置2寄りに乾球温度計29と湿球温度計30が設置されている。葉たばこの乾燥制御は、この乾球温度計29の乾球温度と、湿球温度計30の湿球温度の組合わせによる温湿度条件のコントロールによって行う。   A dry bulb thermometer 29 and a wet bulb thermometer 30 are installed near the rectifying plate 28 in the drying chamber 3 near the hot air generator 2. The drying control of the leaf tobacco is performed by controlling the temperature and humidity conditions by combining the dry bulb temperature of the dry bulb thermometer 29 and the wet bulb temperature of the wet bulb thermometer 30.
湿球温度計30の湿球温度は、吸気ダンパ18の開閉によりコントロールされる。湿球温度が設定温度を超えると、湿球温度計30からの温度変化量(偏差)に基づく比例制御信号により、図4に示すように、吸気ダンパ18が開き、吸気口11から外気Inを吸入すると同時に、風圧式排湿ダンパ19が開き、外部へ必要な排湿が行なわれる。湿球温度が設定温度に戻ると、吸気ダンパ18が温度バランスした開度で止まり安定した排湿が行われる。   The wet bulb temperature of the wet bulb thermometer 30 is controlled by opening and closing the intake damper 18. When the wet bulb temperature exceeds the set temperature, the intake damper 18 is opened by the proportional control signal based on the temperature change amount (deviation) from the wet bulb thermometer 30 and the outside air In is discharged from the intake port 11 as shown in FIG. Simultaneously with the inhalation, the wind pressure type moisture exhaust damper 19 is opened, and the necessary moisture is exhausted to the outside. When the wet bulb temperature returns to the set temperature, the intake damper 18 stops at a temperature-balanced opening, and stable exhaust is performed.
乾球温度計29の乾球温度は、バーナー5の二位置動作(燃焼と停止)制御によりコントロールされる。下限値(設定温度)でバーナー5を着火燃焼し、上限値(設定温度+1℃)でバーナー5を停止する。乾燥室3内の熱バランスの安定により、バーナー5の燃焼と停止の動作の周期が8分から12分の間となるように制御され、また、下限値のアンダーシュートと上限値のオーバーシュートの間の制御幅を2℃以下に保持可能である。   The dry bulb temperature of the dry bulb thermometer 29 is controlled by two-position operation (combustion and stop) control of the burner 5. The burner 5 is ignited and combusted at the lower limit value (set temperature), and the burner 5 is stopped at the upper limit value (set temperature + 1 ° C.). Due to the stability of the heat balance in the drying chamber 3, the combustion and stop operation cycle of the burner 5 is controlled to be between 8 minutes and 12 minutes, and between the lower limit undershoot and the upper limit overshoot. Can be kept at 2 ° C. or less.
上記の如く構成された省エネ型葉たばこ乾燥機1によれば、排熱回収部14、スクリュー板21、排熱回収フィン22の各排熱回収手段によって、損失熱量50%のうち、最大35%を回収することが可能であり、極めて高効率な葉たばこ乾燥機を実現することができる。また、排熱回収によって、熱風発生装置2内の熱バランスの不均衡が解消され、併せて、遠赤外線効果によって、熱バランスを極めて安定させた状態で乾燥温風を乾燥室3内に供給することができる。これによって、乾燥室3内の温度および湿度が平準化され、温度制御性が安定して、葉たばこ乾燥運転制御が安定し、安定した葉たばこ乾燥を行うことができる。また、乾燥葉の仕上がり品質を安定させることができる。   According to the energy-saving leaf tobacco dryer 1 configured as described above, a maximum of 35% of the heat loss of 50% is obtained by the exhaust heat recovery means of the exhaust heat recovery unit 14, the screw plate 21, and the exhaust heat recovery fins 22. The leaf tobacco dryer that can be collected and is extremely efficient can be realized. Further, the exhaust heat recovery eliminates the imbalance of the heat balance in the hot air generator 2 and, at the same time, supplies the dry hot air into the drying chamber 3 with the heat balance being extremely stabilized by the far-infrared effect. be able to. As a result, the temperature and humidity in the drying chamber 3 are leveled, the temperature controllability is stabilized, the leaf tobacco drying operation control is stabilized, and stable leaf tobacco drying can be performed. Moreover, the finished quality of the dried leaf can be stabilized.
本発明者は、本発明に係る図1の葉たばこ乾燥機1と、従来の葉たばこ乾燥機を用いて、葉たばこ乾燥の比較試験を実施した。   The inventor conducted a comparative test of leaf tobacco drying using the leaf tobacco dryer 1 of FIG. 1 according to the present invention and a conventional leaf tobacco dryer.
図6は、本発明に係る葉たばこ乾燥機1と従来の葉たばこ乾燥機のそれぞれの葉たばこ乾燥運転中の乾球温度の変化を示している。従来の葉たばこ乾燥機によると、バーナーの二位置動作(燃焼と停止)制御において、乾球温度の下限値(U.L)を超えるアンダーシュートの値と、乾球温度の上限値(O.L)を超えるオーバーシュートの値の間の制御幅が3〜4℃と大きく、燃焼と停止の動作の周期も2.5〜3.5分と短いことが分かる。これは従来の葉たばこ乾燥機が、乾燥運転中、バーナーの着火・停止を頻繁に繰り返し、温度コントロールが不安定であることを示している。 FIG. 6 shows changes in dry bulb temperature during leaf tobacco drying operation of the leaf tobacco dryer 1 according to the present invention and the conventional leaf tobacco dryer. According to conventional leaf tobacco dryers, undershoot control exceeding the lower limit (UL) of the dry bulb temperature and the upper limit (OL) of the dry bulb temperature in the two-position operation (burning and stopping) control of the burner. It can be seen that the control width between the overshoot values exceeding 3) is as large as 3 to 4 ° C., and the cycle of the combustion and stop operation is also as short as 2.5 to 3.5 minutes. This indicates that the conventional tobacco tobacco dryer frequently repeats ignition and stop of the burner during the drying operation, and the temperature control is unstable.
これに対し、本発明の省エネ型葉たばこ乾燥機1によると、まず、アンダーシュートの値とオーバーシュートの値の間の制御幅が1〜2℃と非常に小さく、また、バーナーの燃焼と停止の動作の周期も10〜12分と非常に長いことが分かる。これは本発明の省エネ型葉たばこ乾燥機1の温度制御が非常に安定し、乾燥運転制御を安定して行えることを示している。   On the other hand, according to the energy-saving leaf tobacco dryer 1 of the present invention, first, the control range between the undershoot value and the overshoot value is as very small as 1 to 2 ° C., and the burner is burned and stopped. It can be seen that the period of operation is also very long, 10 to 12 minutes. This shows that the temperature control of the energy-saving leaf tobacco dryer 1 of the present invention is very stable and the drying operation control can be performed stably.
本発明に係る省エネ型葉たばこ乾燥機を示す全体斜視図、An overall perspective view showing an energy-saving leaf tobacco dryer according to the present invention, 図1に示す省エネ型葉たばこ乾燥機の熱風発生装置の断面図、Sectional drawing of the hot-air generator of the energy-saving leaf tobacco dryer shown in FIG. 排熱回収部の具体例を示す斜視図、The perspective view which shows the specific example of a waste heat recovery part, 図1に示す省エネ型葉たばこ乾燥機のA−A線矢視断面図、AA line arrow sectional view of the energy-saving leaf tobacco dryer shown in FIG. 図1に示す省エネ型葉たばこ乾燥機のB−B線矢視断面図、B-B arrow sectional view of the energy-saving leaf tobacco dryer shown in FIG. 従来の葉たばこ乾燥機と本発明の省エネ型葉たばこ乾燥機のそれぞれの乾燥運転中の乾球温度の変化を示す図である。It is a figure which shows the change of the dry bulb temperature during each drying operation of the conventional leaf tobacco dryer and the energy-saving leaf tobacco dryer of this invention.
符号の説明Explanation of symbols
1 省エネ型葉たばこ乾燥機
2 熱風発生装置
3 乾燥室
4 ケーシング
5 バーナー
6 火炉
7 熱交換器
8 送風機
9 内部排気通路
10 煙突
11 吸気口
12 吸気ダクト
13 排気口
14 排熱回収部
15 外気流通路
16 排気流通路
17 熱良導性薄板
18 吸気ダンパ
19 排湿ダンパ
20 循環口
21 スクリュー板
22 排熱回収フィン
23 下部ピット
24 遠赤外線放射板(遠赤外線放射部)
25 コンテナ
26 葉たばこ(生葉)
27 吊具
27 整流板
29 乾球温度計
30 湿球温度計
DESCRIPTION OF SYMBOLS 1 Energy-saving leaf tobacco dryer 2 Hot air generator 3 Drying chamber 4 Casing 5 Burner 6 Furnace 7 Heat exchanger 8 Blower 9 Internal exhaust passage 10 Chimney 11 Intake port 12 Intake duct 13 Exhaust port 14 Exhaust heat recovery part 15 External airflow passage 16 Exhaust flow passage 17 Thermally conductive thin plate 18 Intake damper 19 Exhaust / humidity damper 20 Circulation port 21 Screw plate 22 Exhaust heat recovery fin 23 Lower pit 24 Far infrared radiation plate (far infrared radiation portion)
25 Container 26 Leaf tobacco (fresh leaves)
27 Lifting device 27 Current plate 29 Dry bulb thermometer 30 Wet bulb thermometer

Claims (7)

  1. 循環空気および/または吸気口から吸入した外気を火炉によって加熱し、高温の乾燥空気を生成する熱風発生装置と、熱風発生装置に連設され、高温の乾燥空気が下部から吹き上げられる葉たばこ乾燥室とを備える葉たばこ乾燥装置において、
    前記熱風発生機内に、葉たばこ乾燥室の排気口からの排気熱を回収し、吸気口から吸入した外気を加温する排熱回収部が設けられ、
    前記火炉と葉たばこ乾燥室の下部との間に、火炉からの輻射熱を受熱して遠赤外線を放射する遠赤外線放射部が配置され、
    葉たばこ乾燥運転中に、加温された外気と循環空気の混合空気であって、火炉によって再加熱された乾燥混合空気と、蓄熱された遠赤外線放射部から放射される遠赤外線とが同時に葉たばこ乾燥室に供給される構成である、ことを特徴とする省エネ型葉たばこ乾燥機。
    A hot air generator that heats the circulating air and / or outside air sucked from the air inlet with a furnace to generate high-temperature dry air, and a leaf tobacco drying chamber that is connected to the hot air generator and blows high-temperature dry air from below. In a tobacco drying apparatus comprising:
    In the hot air generator, an exhaust heat recovery unit that recovers exhaust heat from the exhaust port of the tobacco drying chamber and warms the outside air sucked from the intake port is provided,
    Between the furnace and the lower part of the tobacco drying chamber, a far-infrared radiation section that receives radiant heat from the furnace and emits far-infrared radiation is disposed,
    During leaf tobacco drying operation, the mixture of warmed outside air and circulating air, which is reheated by the furnace and the far infrared rays emitted from the stored far-infrared radiation section, is dried at the same time. An energy-saving leaf tobacco dryer, characterized in that it is configured to be supplied to a room.
  2. 前記遠赤外線放射部は、その主成分がシラスバルーンおよび粒状のトルマリン石から構成される、ことを特徴とする請求項1記載の省エネ型葉たばこ乾燥機。   The energy-saving leaf tobacco dryer according to claim 1, wherein the far-infrared radiation unit is mainly composed of shirasu balloon and granular tourmaline stone.
  3. 前記遠赤外線放射部は、粒径1mm〜8mmのシラスバルーン35〜55重量%、粒径50〜300ミクロンのシラスバルーン3〜15重量%、粒状のトルマリン石1〜10重量%を配合し、ケイ酸ナトリウム及びアルミナセメントにより凝固させて板状に成形されている、ことを特徴とする請求項1記載の省エネ型葉たばこ乾燥機。   The far-infrared radiation part is composed of 35 to 55% by weight of shirasu balloon having a particle size of 1 to 8 mm, 3 to 15% by weight of shirasu balloon having a particle size of 50 to 300 microns, and 1 to 10% by weight of granular tourmaline stone. The energy-saving leaf tobacco dryer according to claim 1, wherein the energy-saving leaf tobacco dryer is solidified by sodium acid and alumina cement and formed into a plate shape.
  4. 火炉の外面に遠赤外線塗料が塗布されていることを特徴とする請求項1ないし請求項3記載の省エネ型葉たばこ乾燥機。   4. The energy-saving leaf tobacco dryer according to claim 1, wherein a far-infrared paint is applied to the outer surface of the furnace.
  5. 火炉から外部煙突に続く内部排気通路内にスクリュー板が挿入配置されていることを特徴とする請求項1ないし請求項4記載の省エネ型葉たばこ乾燥機。   The energy-saving leaf tobacco dryer according to any one of claims 1 to 4, wherein a screw plate is inserted and disposed in an internal exhaust passage extending from the furnace to the external chimney.
  6. 火炉から外部煙突に続く内部排気通路の管体外面に排熱回収フィンが設けられていることを特徴とする請求項1ないし請求項5記載の省エネ型葉たばこ乾燥機。   6. The energy-saving leaf tobacco dryer according to claim 1, wherein exhaust heat recovery fins are provided on an outer surface of a tube body of an internal exhaust passage extending from a furnace to an external chimney.
  7. 請求項1記載の葉たばこ乾燥機を用いた葉たばこ乾燥制御方法において、
    熱風発生装置の火炉に用いられるバーナーについて、乾燥室内に設置した温度センサーの設定温度の下限値および上限値の二位置で燃焼と停止を動作制御し、その燃焼と停止の動作の周期を8分以上、12分以下になるように制御することを特徴とする、葉たばこ乾燥制御方法。
    In the leaf tobacco drying control method using the leaf tobacco dryer according to claim 1,
    For the burner used in the furnace of the hot air generator, the combustion and stop operation are controlled at two positions, the lower limit value and the upper limit value of the temperature sensor set in the drying chamber, and the cycle of the combustion and stop operation is 8 minutes. As described above, the leaf tobacco drying control method is controlled so as to be 12 minutes or less.
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CN102524928A (en) * 2011-12-26 2012-07-04 山东潍坊烟草有限公司 Flue-curing barn for curing tobaccos
CN103019278A (en) * 2012-11-16 2013-04-03 山东临沂烟草有限公司 Self-control bulk curing barn capable of accurately baking biomass
CN103099298A (en) * 2013-03-04 2013-05-15 贵州省烟草公司黔南州公司 Tobacco leaf bulk curing barn smoke waste heat utilization device
JP2013108724A (en) * 2011-11-24 2013-06-06 Sanshu Sangyo Co Ltd Wood dryer and drying control method therefor
JP2013111027A (en) * 2011-11-29 2013-06-10 Fulta Electric Machinery Co Ltd Food drier
CN103932373A (en) * 2014-04-30 2014-07-23 河南佰衡节能技术有限公司 Curing barn
CN104238478A (en) * 2013-06-20 2014-12-24 四川烟叶复烤有限责任公司宜宾复烤厂 Tobacco redrying production line hot machine material-lack energy saving method
CN105394804A (en) * 2015-11-10 2016-03-16 中国烟草总公司广东省公司 Laminated tobacco leaf curing device allowing tobacco leaves to be horizontally placed in bulk
WO2017130329A1 (en) * 2016-01-27 2017-08-03 日本たばこ産業株式会社 Tobacco leaf drying apparatus
CN107062827A (en) * 2017-06-07 2017-08-18 中国农业大学 A kind of infrared hot wind combined drying case of temperature controllable damping
CN108851170A (en) * 2018-07-27 2018-11-23 贵州省烟草公司遵义市公司 A kind of tobacco leaf is constant to warm continuous baking method and bakery
CN109489066A (en) * 2017-12-20 2019-03-19 云南省烟草农业科学研究院 The open fire heat preserving method of biological particles burning in a kind of tobacco flue-curing

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CN104544532A (en) * 2013-10-18 2015-04-29 湖南省烟草公司长沙市公司宁乡县分公司 Tobacco curing room and flue fire control gate plate device thereof
CN108851181B (en) * 2018-07-25 2021-03-16 湖北中烟工业有限责任公司 Automatic control device and method for moisture of finished tobacco products reconstituted by papermaking method

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013108724A (en) * 2011-11-24 2013-06-06 Sanshu Sangyo Co Ltd Wood dryer and drying control method therefor
JP2013111027A (en) * 2011-11-29 2013-06-10 Fulta Electric Machinery Co Ltd Food drier
CN102524928A (en) * 2011-12-26 2012-07-04 山东潍坊烟草有限公司 Flue-curing barn for curing tobaccos
CN103019278A (en) * 2012-11-16 2013-04-03 山东临沂烟草有限公司 Self-control bulk curing barn capable of accurately baking biomass
CN103099298A (en) * 2013-03-04 2013-05-15 贵州省烟草公司黔南州公司 Tobacco leaf bulk curing barn smoke waste heat utilization device
CN104238478A (en) * 2013-06-20 2014-12-24 四川烟叶复烤有限责任公司宜宾复烤厂 Tobacco redrying production line hot machine material-lack energy saving method
CN103932373A (en) * 2014-04-30 2014-07-23 河南佰衡节能技术有限公司 Curing barn
CN103932373B (en) * 2014-04-30 2015-03-25 河南佰衡节能技术有限公司 Curing barn
CN105394804A (en) * 2015-11-10 2016-03-16 中国烟草总公司广东省公司 Laminated tobacco leaf curing device allowing tobacco leaves to be horizontally placed in bulk
WO2017130329A1 (en) * 2016-01-27 2017-08-03 日本たばこ産業株式会社 Tobacco leaf drying apparatus
CN107062827A (en) * 2017-06-07 2017-08-18 中国农业大学 A kind of infrared hot wind combined drying case of temperature controllable damping
CN107062827B (en) * 2017-06-07 2018-12-18 中国农业大学 A kind of infrared hot wind combined drying case of temperature controllable damping
CN109489066A (en) * 2017-12-20 2019-03-19 云南省烟草农业科学研究院 The open fire heat preserving method of biological particles burning in a kind of tobacco flue-curing
CN108851170A (en) * 2018-07-27 2018-11-23 贵州省烟草公司遵义市公司 A kind of tobacco leaf is constant to warm continuous baking method and bakery

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