JP2001221419A - Apparatus for drying and supplying waste - Google Patents
Apparatus for drying and supplying wasteInfo
- Publication number
- JP2001221419A JP2001221419A JP2000028399A JP2000028399A JP2001221419A JP 2001221419 A JP2001221419 A JP 2001221419A JP 2000028399 A JP2000028399 A JP 2000028399A JP 2000028399 A JP2000028399 A JP 2000028399A JP 2001221419 A JP2001221419 A JP 2001221419A
- Authority
- JP
- Japan
- Prior art keywords
- drying
- feeder
- waste
- fluidized bed
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Gasification And Melting Of Waste (AREA)
- Disintegrating Or Milling (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、都市ごみや産業廃
棄物を焼却し、その焼却熱によって、廃棄物に含有され
る灰分を溶融し、及びボイラー給水を加熱して、建築用
骨材等、及び発電プラント用等の蒸気を製造するシステ
ム等において、流動床式燃焼炉或は熱分解炉内の熱流動
媒体を還流し、その熱を利用して廃棄物を乾燥、粉砕し
流動床炉に供給する、廃棄物の乾燥供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the incineration of municipal solid waste and industrial waste, the melting of ash contained in the waste by the heat of incineration, and the heating of boiler feed water to produce aggregates for buildings and the like. In a system for producing steam for power plants, etc., a fluidized bed combustion furnace or a fluidized bed in a pyrolysis furnace is refluxed, and waste heat is dried and pulverized by utilizing the heat to obtain a fluidized bed furnace. The present invention relates to an apparatus for drying and supplying waste.
【０００２】[0002]
【従来の技術】都市ごみや産業廃棄物を焼却し、その焼
却熱によって、廃棄物に含有される灰分を溶融後冷却し
て建築用骨材等を得、更に発電プラント用等の蒸気を製
造するシステムにおいて、従来、流動床式熱分解炉に供
給する固形廃棄物は適当な大きさに粉砕して流動層の上
部空間に供給されている。或は、特開平１０−８９６４
８には流動床式乾燥炉を設けて、散気板を通して供給さ
れる１５０℃前後のＥＧＲを供給するとともに、チャー
燃焼炉から循環された熱流動砂を供給して廃棄物を乾燥
し、乾燥された廃棄物・砂混合体を前記乾燥炉から重力
で熱分解炉の流動層に供給する装置及び二軸スクリュー
横型攪拌搬送装置にＥＧＲと熱流動砂を供給して廃棄物
と攪拌、混合して送りながら廃棄物を乾燥し、乾燥され
た廃棄物・砂混合体を重力で熱分解炉に供給する装置が
開示されている。2. Description of the Related Art Municipal waste and industrial waste are incinerated, and the ash contained in the waste is melted and cooled by the incineration heat to obtain building aggregates and the like, and steam for power plants and the like is produced. Conventionally, solid waste to be supplied to a fluidized bed type pyrolysis furnace is pulverized to an appropriate size and supplied to an upper space of a fluidized bed. Alternatively, Japanese Patent Application Laid-Open No. 10-8964
8 is provided with a fluidized bed type drying furnace to supply EGR at about 150 ° C. supplied through a diffuser plate and to supply hot fluidized sand circulated from a char combustion furnace to dry waste and to dry the waste. The EGR and the hot fluidized sand are supplied from the drying furnace to the device for supplying the fluidized bed of the pyrolysis furnace from the drying oven to the fluidized bed of the pyrolysis furnace and the twin-screw horizontal stirring and conveying device, and are stirred and mixed with the waste. An apparatus is disclosed in which waste is dried while being sent by a vacuum and the dried waste / sand mixture is supplied to a pyrolysis furnace by gravity.
【０００３】[0003]
【発明が解決しようとする課題】都市ごみ等廃棄物の発
熱量は廃棄物の種類によって異なるが、特に廃棄物中の
水分含有率の影響が大きい。水は蒸発潜熱が大きく、ま
た水蒸気の比熱は空気や炭酸ガスの比熱の２倍を越え、
水分含有率が高いと廃棄物の発熱量が小さくなり、燃焼
ガスの温度が低くなるので、燃焼ガスの温度を利用する
装置の運転が困難になることがある。また水分の含有率
が異なる廃棄物が混在すると廃棄物燃焼による燃焼ガス
の温度のばらつきが大きくなり、燃焼ガスの温度を利用
する装置の安定的運転が困難になる。特に流動床式熱分
解炉で廃棄物の熱分解を行ない、熱分解ガスを灰溶融炉
で燃焼させた高温ガスで灰分を溶融してスラグ化する装
置では発熱量の大きい熱分解ガスが要求される。The calorific value of waste such as municipal waste varies depending on the type of waste, but the influence of the water content in the waste is particularly large. Water has a large latent heat of vaporization, and the specific heat of water vapor is more than twice the specific heat of air and carbon dioxide.
When the moisture content is high, the calorific value of the waste becomes small and the temperature of the combustion gas becomes low, so that it may be difficult to operate a device utilizing the temperature of the combustion gas. Further, when wastes having different moisture contents coexist, the temperature of the combustion gas due to the combustion of the wastes greatly increases, and it becomes difficult to stably operate an apparatus using the temperature of the combustion gas. In particular, a pyrolysis furnace that performs pyrolysis of waste in a fluidized bed pyrolysis furnace and melts ash with high-temperature gas produced by burning pyrolysis gas in an ash melting furnace requires a pyrolysis gas with a large calorific value. You.
【０００４】従って、かかる装置では廃棄物を充分に乾
燥させて熱分解炉に供給する必要がある。前記特開平１
０−８９６４８に開示された廃棄物の乾燥供給装置は、
流動床式乾燥炉では廃棄物の紛砕及び流動砂との混合が
迅速、充分に行なわれ難く、また、二軸スクリュー式攪
拌搬送装置でも粉砕が迅速、充分に行なわれ難く、従っ
て乾燥に時間を要するので、乾燥装置はある程度大きく
ならざるを得なかった。Therefore, in such an apparatus, it is necessary to sufficiently dry the waste and supply it to the pyrolysis furnace. Japanese Unexamined Patent Publication No.
An apparatus for drying and supplying waste as disclosed in U.S. Pat.
In a fluidized bed type drying furnace, crushing of waste and mixing with fluidized sand are difficult and quick to be sufficiently performed, and also in a twin screw type stirring and conveying device, crushing is difficult and difficult to be performed. Therefore, the drying apparatus had to be somewhat large.
【０００５】また、廃棄物を流動層上部空間に供給する
場合は、固形廃棄物の場合、廃棄物の形が不定形でばら
つきが大きく供給量に変動が生じ易い、ビニール等の軽
質物がフリーボード部に飛散して生成ガスに混入し該生
成ガスを灰溶融炉に供給するノズルの閉塞を惹起する、
廃棄物を投入する炉内の圧力は大気圧より高いため廃棄
物を炉内に供給する際は炉内のガスが漏出する、等の問
題がある。本発明は、上記問題点に鑑み、小型コンパク
トで、廃棄物が充分に粉砕されて流動砂と均一に混合さ
れた状態で、流動床炉に供給できる廃棄物の乾燥供給装
置を提供することを目的とする。[0005] When waste is supplied to the upper space of the fluidized bed, solid waste is free from light materials such as vinyl and the like, because the shape of the waste is irregular, the dispersion is large, and the supply amount tends to fluctuate. Causing a blockage of a nozzle that scatters on the board portion and mixes with the generated gas to supply the generated gas to the ash melting furnace;
Since the pressure in the furnace into which the waste is charged is higher than the atmospheric pressure, when the waste is supplied into the furnace, there are problems such as gas leaking from the furnace. The present invention has been made in view of the above problems, and has as its object to provide a waste drying and supplying apparatus which can be supplied to a fluidized bed furnace in a state in which the waste is sufficiently compacted and uniformly mixed with fluidized sand in a compact and compact manner. Aim.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の発明は、
複数の送りパドルと攪拌パドルを有する二軸の回転軸を
回転自在に枢支したケーシングの外周面の一端側上面に
廃棄物と熱流動媒体を供給する供給口を設け、前記外周
面の他端側下面に排出口を設け、前記送りパドルは前記
回転軸に前記供給口寄りに固設して主として前記廃棄物
と熱流動媒体の前記排出口側への送りを行ない、前記攪
拌パドルは前記回転軸に前記排出口寄りに固設して主と
して前記廃棄物と熱流動媒体の攪拌・粉砕・混合を行な
い、前記供給口から供給された廃棄物を前記熱流動媒体
の熱によって乾燥させながら粉砕して前記熱流動媒体と
均一な混合体にして前記排出口に送り出す乾燥フィーダ
を含むことを特徴とする。According to the first aspect of the present invention,
A supply port for supplying waste and a heat-fluid medium is provided on an upper surface on one end side of an outer peripheral surface of a casing rotatably supporting a biaxial rotary shaft having a plurality of feed paddles and a stirring paddle, and the other end of the outer peripheral surface is provided. A discharge port is provided on the side lower surface, and the feed paddle is fixed to the rotation shaft near the supply port to mainly feed the waste and the heat-fluid medium to the discharge port side, and the stirring paddle rotates the rotary pad. A shaft is fixed near the discharge port to mainly stir, pulverize, and mix the waste and the heat-fluid medium, and pulverize the waste supplied from the supply port while drying it by the heat of the heat-fluid medium. And a drying feeder for forming a uniform mixture with the heat-fluid medium and sending the mixture to the outlet.
【０００７】かかる発明によれば、乾燥フィーダの供給
口から投入された廃棄物は、まず回転軸に前記供給口寄
りに固設されたパドル面の前記回転軸直角方向に対する
傾き角が小さい、即ち食違い角が小さい複数の送りパド
ルによって、前記供給口から供給される流動床式燃焼炉
から還流された高温の流動砂と攪拌混合されながら前記
乾燥フィーダの排出口に向って送られ、送られるにした
がって廃棄物は前記流動砂の熱によって乾燥される。According to the invention, the waste introduced from the supply port of the drying feeder has a small inclination angle with respect to the direction perpendicular to the rotation axis of the paddle surface fixed to the rotation axis near the supply port. A plurality of feed paddles having small stagger angles are sent toward the discharge port of the drying feeder while being stirred and mixed with the high-temperature fluidized sand refluxed from the fluidized bed combustion furnace supplied from the supply port. Accordingly, the waste is dried by the heat of the fluidized sand.
【０００８】廃棄物は乾燥されるにしたがってパドルか
ら受ける機械的衝撃により粉砕され易くなり、粉砕され
て小片化するほど嵩が減少するので、前記乾燥フィーダ
の排出口に近づくほど送り速度は遅くするのがよい。廃
棄物は前記供給口から或る程度前記排出口側に進むと、
乾燥が進んだ廃棄物が前記回転軸に前記排出口寄りに固
設されたパドル面の前記回転軸直角方向に対する傾き角
が大きい、即ち食違い角が大きくて送り機能が小さい複
数のパドルによって大きな衝撃を受けて小片に粉砕さ
れ、廃棄物の表面積が増大するので熱流動砂との接触面
積が増え、ますます乾燥し易くなる。廃棄物は、前記排
出口に到達した時には細かく砕かれた廃棄物と廃棄物と
の熱交換で温度が下がった流動砂とが均一に混合した状
態になり、前記排出口から排出され、所要の場所に供給
される。[0008] As the waste is dried, it is easily crushed by the mechanical impact received from the paddle, and the bulk decreases as the crushed and fragmented. Therefore, the feed speed decreases as the waste gets closer to the outlet of the dry feeder. Is good. When the waste proceeds to a certain extent from the supply port toward the discharge port,
The dried waste has a large inclination angle with respect to the direction perpendicular to the rotation axis of a paddle surface fixed to the rotation axis near the discharge port, that is, a large stagger angle and a large paddle having a small feeding function. It is crushed into small pieces by the impact, and the surface area of the waste is increased, so that the contact area with the hot fluidized sand is increased, and it becomes easier to dry. When the waste reaches the outlet, the finely crushed waste and the fluidized sand whose temperature has decreased due to heat exchange with the waste are in a uniformly mixed state, discharged from the outlet, and discharged as required. Supplied to the place.
【０００９】請求項２記載の発明は、乾燥フィーダの下
側に配設されて前記乾燥フィーダの排出口に続設され前
記均一混合体を流動床炉に供給する第２フィーダを含む
ことを特徴とするもので、前記乾燥フィーダの排出口で
は細かく砕かれた廃棄物と廃棄物との熱交換で温度が下
がった流動砂とが均一に混合した状態の混合体は、前記
乾燥フィーダの排出口に入口が連結された第２フィーダ
に流下し、該フィーダによって流動床炉に供給される。
請求項３記載の発明は、乾燥フィーダのパドルの先端側
を根元側より幅狭に形成したことを特徴とするもので、
パドルに紐状の廃棄物が絡みついた場合にパドルの先端
に向って滑って外れ易くしたものである。According to a second aspect of the present invention, there is provided a second feeder disposed below the drying feeder and connected to an outlet of the drying feeder to supply the uniform mixture to a fluidized bed furnace. In the outlet of the drying feeder, the mixture in a state where the finely crushed waste and the fluidized sand whose temperature has been lowered by heat exchange between the waste and the waste are uniformly mixed is the outlet of the drying feeder. Flows down to a second feeder having an inlet connected thereto, and is supplied to the fluidized bed furnace by the feeder.
The invention according to claim 3 is characterized in that the tip side of the paddle of the drying feeder is formed narrower than the base side.
When string-like waste is entangled with the paddle, the paddle slides toward the tip of the paddle to be easily detached.
【００１０】請求項４記載の発明は、乾燥フィーダの下
側に配設されて前記乾燥フィーダの排出口に続設され前
記均一混合体を流動床炉に供給する第２フィーダの排出
口が流動床炉の流動層に対面するように取付けたことを
特徴とするもので、乾燥、粉砕小片化された廃棄物を流
動砂と均一に混合された状態で流動層に押込むことによ
り流動床炉からのガス漏れを略完全に防ぐことができ、
また廃棄物の流動層への混合を早めて熱分解や燃焼が均
一になり、発熱量の安定した熱分解や燃焼生成物が得ら
れる。According to a fourth aspect of the present invention, the outlet of the second feeder, which is disposed below the drying feeder and is connected to the outlet of the drying feeder and supplies the uniform mixture to the fluidized bed furnace, flows through the outlet. It is characterized by being installed so as to face the fluidized bed of a floor furnace, and by pushing dried and crushed waste into a fluidized bed while being uniformly mixed with fluidized sand, the fluidized bed furnace Can almost completely prevent gas leakage from
Further, the pyrolysis and combustion of the waste are accelerated to be mixed into the fluidized bed, whereby the pyrolysis and combustion become uniform, and the pyrolysis and combustion products having a stable calorific value can be obtained.
【００１１】請求項５記載の発明は、乾燥フィーダの下
側に配設されて前記乾燥フィーダの排出口に続設され前
記均一混合体を流動床炉に供給する第２フィーダの排出
口が流動床炉の流動層上方空間に対面するように取付け
たことを特徴とするもので、前記第２フィーダ内及び該
第２フィーダへの前記均一混合体の入口と前記乾燥フィ
ーダの排出口との接続部には前記均一混合体が充満して
いてシール効果を有するので、流動層上方空間に廃棄物
を供給してもガス漏れがない。また充分に乾燥、粉砕小
片化された廃棄物は流動砂と均一に混合された状態で投
入されるので、ビニール布片等が飛散することもない。According to a fifth aspect of the present invention, the outlet of the second feeder, which is provided below the drying feeder and is connected to the outlet of the drying feeder and supplies the uniform mixture to the fluidized bed furnace, flows. A connection between an inlet of the homogeneous mixture into and into the second feeder and an outlet of the drying feeder, wherein the inlet is provided so as to face a space above the fluidized bed of the floor furnace. Since the portion is filled with the uniform mixture and has a sealing effect, there is no gas leakage even if waste is supplied to the space above the fluidized bed. Further, since the sufficiently dried and pulverized waste is charged in a state of being uniformly mixed with the fluidized sand, the vinyl cloth and the like do not scatter.
【００１２】請求項６記載の発明は、乾燥フィーダから
排出される前記均一混合体を流動床炉の流動層上方空間
に供給することを特徴とするもので、流動床炉内のガス
が前記乾燥フィーダを通って漏出するのを防ぐために、
前記乾燥フィーダ排出口から流動床炉の投入口との間の
前記均一混合体の通路抵抗を或る程度大きくして、前記
乾燥フィーダが常に前記均一混合体を押出すように通路
抵抗と前記乾燥フィーダの送出し力との兼合いをとる。
また、流動床炉の前記均一混合体投入口と前記乾燥フィ
ーダとの高度差をできるだけ大きくしてヘッド差による
シール効果の増大をはかる。前記均一混合体は乾燥、粉
砕小片化された廃棄物と砂が均一に混合しているもので
あるからかなり緻密であり、シールは容易に確保でき
る。また充分に乾燥、粉砕小片化された廃棄物は流動砂
と均一に混合した状態で投入されるので、ビニール布片
等が飛散することもない。The invention according to claim 6 is characterized in that the uniform mixture discharged from the drying feeder is supplied to a space above a fluidized bed of a fluidized bed furnace, and the gas in the fluidized bed furnace is dried. To prevent leakage through the feeder,
The passage resistance of the uniform mixture from the drying feeder discharge port to the inlet of the fluidized bed furnace is increased to some extent, so that the drying feeder always extrudes the uniform mixture and the path resistance and the drying resistance are increased. Balance with the feeder's delivery force.
Further, the height difference between the uniform mixture inlet of the fluidized bed furnace and the drying feeder is made as large as possible to increase the sealing effect due to the head difference. Since the uniform mixture is a mixture of the dried and crushed waste and the sand uniformly mixed, the mixture is quite dense, and the seal can be easily secured. Further, since the waste which has been sufficiently dried and pulverized into small pieces is charged in a state of being uniformly mixed with the fluidized sand, the vinyl cloth pieces and the like do not scatter.
【００１３】請求項７記載の発明は、第２フィーダがス
クリューコンベア式の第２フィーダであることを特徴と
するもので、乾燥、粉砕小片化された廃棄物と流動砂の
均一混合体をスクリューコンベアによって一定流量で流
動床炉に供給するので、発熱量ばらつきの小さい廃棄物
が一定流量で供給されることになり、安定した熱分解炉
や燃焼炉の運転が容易に可能となる。According to a seventh aspect of the present invention, the second feeder is a second feeder of a screw conveyor type, wherein a uniform mixture of dried and pulverized waste and fluidized sand is screwed. Since the feed is supplied to the fluidized-bed furnace at a constant flow rate by the conveyer, waste having a small variation in the calorific value is supplied at a constant flow rate, and stable operation of the pyrolysis furnace and the combustion furnace can be easily performed.
【００１４】[0014]
【発明の実施の形態】以下、本発明を図に示した実施例
を用いて詳細に説明する。但し、この実施例に記載され
る寸法、材質、形状、その相対位置などは特に特定的な
記載がない限り、この発明の範囲をそれのみに限定する
趣旨ではなく単なる説明例にすぎない。図１は、本発明
の第１実施例に係わる廃棄物の乾燥供給装置の構成を示
す断面図で、(A)は縦断面図、(Ｂ)は(A)におけるＺ−Ｚ
断面を示す。図２は図１における乾燥フィーダの拡大図
で、(A) は縦断面図、(Ｂ)は(A)におけるＸ−Ｘ断面、
(Ｃ)は(A)におけるＹ−Ｙ断面を示す。図３は図２(A)に
おけるパドル形状を第２実施例の形状とした場合を示
す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, dimensions, materials, shapes, relative positions, and the like described in the embodiments are not intended to limit the scope of the present invention, but are merely illustrative examples, unless otherwise specified. FIG. 1 is a cross-sectional view showing a configuration of a waste drying and supplying apparatus according to a first embodiment of the present invention, where (A) is a longitudinal cross-sectional view, and (B) is a ZZ in (A).
3 shows a cross section. 2 is an enlarged view of the drying feeder in FIG. 1, (A) is a longitudinal sectional view, (B) is an XX section in (A),
(C) shows a YY cross section in (A). FIG. 3 shows a case where the paddle shape in FIG. 2A is the shape of the second embodiment.
【００１５】図１、２において、乾燥フィーダ１０の供
給口１１から入口ダクト２を通って供給された廃棄物と
流動床炉から還流される熱流動媒体は、モータ７で回転
駆動される２個のパドル軸４、４'の夫々に軸方向間隔
をとって固設された複数の送りパドル５によって排出口
１２側へ向かって送られる。１はケーシング、３は出口
ダクト、８はパドル軸の軸受けである。パドル軸４、
４'のパドルは互いにかみ合うように回転される。廃棄
物と熱流動媒体は別別の供給口から供給されてもよい。
廃棄物は、送りパドル５により送られるに従って熱流動
媒体と混合され、該熱流動媒体の熱により乾燥されて体
積が縮小され、攪拌パドル６によって前記熱流動媒体と
攪拌混合される。廃棄物は乾燥するに従って粉砕され易
くなるので、前記攪拌パドル６により小片に粉砕されな
がら流動媒体と均一に混合されて乾燥が促進され、前記
排出口１２に送られる。廃棄物の乾燥により発生する湿
気ガス９は、熱分解炉生成ガス流れの後流に配設される
二次燃焼炉に導かれ、湿気ガス９中の臭気分は二次燃焼
炉内の高温で分解される。In FIG. 1 and FIG. 2, waste supplied from a supply port 11 of a drying feeder 10 through an inlet duct 2 and a heat-fluid medium refluxed from a fluidized-bed furnace are driven by a motor 7 to rotate. The paddle shafts 4, 4 ′ are sent toward the discharge port 12 by a plurality of feed paddles 5 fixed at an axial interval. 1 is a casing, 3 is an outlet duct, and 8 is a paddle shaft bearing. Paddle shaft 4,
The 4 'paddles are rotated to engage each other. The waste and the heat transfer medium may be supplied from separate supply ports.
The waste is mixed with the heat-fluid medium as it is sent by the feed paddle 5, dried by the heat of the heat-fluid medium, reduced in volume, and stirred and mixed with the heat-fluid medium by the stirring paddle 6. Since the waste becomes easier to be crushed as it dries, it is uniformly mixed with the fluid medium while being crushed into small pieces by the stirring paddle 6 to promote drying, and sent to the outlet 12. The humid gas 9 generated by drying the waste is led to a secondary combustion furnace disposed downstream of the pyrolysis furnace generated gas flow, and the odor in the humid gas 9 is high at the high temperature in the secondary combustion furnace. Decomposed.
【００１６】パドル軸４に固設される送りパドル５のパ
ドル軸４に直角方向に対する傾き角度、いわゆる食違い
角ａの大きさによって送り速度が変る。図２(A)では、
攪拌パドル６の食違い角ａは９０°として送り機能をも
たせてないが、送りパドルと攪拌パドルは前記食違い角
ａを順次変えて送り機能と攪拌機能を適宜按配するよう
にしてもよい。図２(B)、(C)において、パドルは４方向
に９０°間隔で配設されているが、４方向以外の例えば
３方向或は５方向等でもよい。図２におけるパドルの正
面形状は長方形であるが、図３に示すように、パドル５
a，６aの正面形状を梯形としてもよい。あるいは、パド
ルの先端が根元よりも幅狭の形状であればよい。廃棄物
の送りや攪拌中に紐状の廃棄物がパドルに絡み付くこと
があり、パドル形状が先端に向って幅狭であると絡みつ
いた紐状物がパドルの先端に向って滑り、外れ易くな
る。The feed speed varies depending on the inclination angle of the feed paddle 5 fixed to the paddle shaft 4 with respect to the direction perpendicular to the paddle shaft 4, that is, the so-called stagger angle a. In FIG. 2 (A),
The stagger angle a of the stirring paddle 6 is 90 ° and the feeding function is not provided. However, the feeding paddle and the stirring paddle may be arranged so that the staggering angle a is sequentially changed so that the feeding function and the stirring function are appropriately arranged. In FIGS. 2 (B) and 2 (C), the paddles are arranged at 90 ° intervals in four directions, but may be in three directions or five directions other than the four directions. The front shape of the paddle in FIG. 2 is rectangular, but as shown in FIG.
The front shapes of a and 6a may be trapezoidal. Alternatively, the tip of the paddle may have a shape that is narrower than the root. During the feeding and stirring of waste, string-like waste may get tangled with the paddle, and if the paddle shape is narrow toward the tip, the tangled string slides toward the tip of the paddle and easily comes off .
【００１７】第２フィーダ２０は前記乾燥フィーダ１０
の下に前記出口ダクト３を介して接続され、該ダクト３
を通って流下した小片に粉砕された乾燥廃棄物と流動媒
体の均一混合体を、モータ２３により回転駆動されるス
クリュー２１により一定速度で熱分解炉３０の開口２２
から流動層３１に送込む。その際、第２フィーダ２０内
の廃棄物と流動媒体の均一混合体が炉内流動層に対する
シールを行なうが、前記均一混合体は相当に密度が高い
ので、高温の炉内流動媒体に対して充分なシール効果を
有する。前記第２フィーダはスクリューコンベア以外の
例えばプッシャー等であってもよい。The second feeder 20 is provided with the dry feeder 10.
Through the outlet duct 3, the duct 3
A uniform mixture of the dried waste and the fluidized medium pulverized into small pieces flowing down through the opening 22 of the pyrolysis furnace 30 at a constant speed by a screw 21 rotated by a motor 23.
To the fluidized bed 31. At this time, the homogeneous mixture of the waste and the fluidized medium in the second feeder 20 seals against the fluidized bed in the furnace. It has a sufficient sealing effect. The second feeder may be a pusher or the like other than the screw conveyor.
【００１８】図４は、固形廃棄物の処理システムに本発
明の廃棄物の乾燥供給装置を装着した場合の一実施例を
示す。該処理システムは、流動床式熱分解炉５２で発生
した熱分解ガス・チャー・灰６１を溶融炉５３に導いて
燃焼し、その燃焼熱によって集塵装置５８で捕集し前記
溶融炉５３に導かれた飛灰６３と前記熱分解炉５２で生
成された熱分解ガス・チャー・灰６１中の灰分を約１４
００℃で溶融してスラグ６４とし、該スラグはスラグ水
槽６０に流下して建築用骨材等に用いられる水冷スラグ
を得る。前記溶融炉５３を出た燃焼ガスは二次燃焼炉５
４で完全燃焼され、燃焼排気はボイラ又はスーパーヒー
タ７２で蒸気を過熱後にエアヒータ５７で前記溶融炉５
３及び熱分解炉５２に供給する燃焼用空気８２を加熱
し、集塵装置５８を通って大気中に排出される。前記溶
融炉５３及び二次燃焼炉５４の炉壁は水冷壁ボイラ７０
及び７１に構成されている。廃棄物の乾燥により発生す
る湿気ガス８３は前記二次燃焼炉５４に導かれ、該二次
燃焼炉５４内の高温によって前記湿気ガス８３中の臭気
は分解される。FIG. 4 shows an embodiment in which the solid waste treatment system is equipped with the waste drying and feeding device of the present invention. The treatment system guides the pyrolysis gas, char, and ash 61 generated in the fluidized bed type pyrolysis furnace 52 to the melting furnace 53 and burns it. The introduced fly ash 63 and the ash in the pyrolysis gas, char and ash 61 generated in the pyrolysis furnace 52 are reduced by about 14%.
The slag is melted at 00 ° C. to form a slag 64, and the slag flows down to a slag water tank 60 to obtain a water-cooled slag used for an aggregate for building and the like. The combustion gas exiting the melting furnace 53 is supplied to the secondary combustion furnace 5
The combustion exhaust gas is heated by a boiler or a super heater 72 and then heated by an air heater 57 in the melting furnace 5.
3 and the combustion air 82 supplied to the pyrolysis furnace 52 is heated and discharged to the atmosphere through the dust collecting device 58. The furnace walls of the melting furnace 53 and the secondary combustion furnace 54 are water cooled wall boilers 70.
And 71. The humid gas 83 generated by drying the waste is led to the secondary combustion furnace 54, and the odor in the humid gas 83 is decomposed by the high temperature in the secondary combustion furnace 54.
【００１９】本発明の第２フィーダ２０を含む場合の廃
棄物の乾燥供給装置が前記熱分解炉５２に取付けられ、
乾燥、粉砕された廃棄物と流動砂の均一混合体は前記熱
分解炉５２の流動層にスクリュー式第２フィーダ２０を
介して供給される。前記熱分解炉５２の流動層の砂が前
記第２フィーダ２０内に進入しないように、該フィーダ
２０は前記均一混合体で隙間なく充満されていなければ
ならないが、本発明の廃棄物の乾燥フィーダによって形
成される前記均一混合体は、廃棄物が充分に乾燥され、
細かく砕かれて砂と均一に混合したものであるから、前
記第２フィーダ２０内を隙間なく充満することができ、
シール性に優れている。前記均一混合体を前記第２フィ
ーダ内に充満させるためには、前記乾燥フィーダ１０に
よって前記均一混合体が常に前記第２フィーダ２０に押
込まれるようにしておく必要があり、それは前記第２フ
ィーダ２０の供給速度と前記乾燥フィーダ１０の送出し
力との兼合いで調整される。乾燥フィーダ１０の送出し
力は前に述べたようにパドルの食違い角により調整され
る。A waste drying and feeding device including the second feeder 20 of the present invention is attached to the pyrolysis furnace 52,
The uniform mixture of the dried and pulverized waste and the fluidized sand is supplied to the fluidized bed of the pyrolysis furnace 52 through the second screw type feeder 20. The feeder 20 must be filled with the uniform mixture without gaps so that the sand of the fluidized bed of the pyrolysis furnace 52 does not enter the second feeder 20. Said homogeneous mixture formed by the waste is sufficiently dried,
Since it is finely crushed and uniformly mixed with sand, the inside of the second feeder 20 can be filled without gaps,
Excellent sealing properties. In order to fill the uniform mixture into the second feeder, it is necessary that the uniform mixture is always pushed into the second feeder 20 by the drying feeder 10, and the second feeder The feed speed of the drying feeder 20 is adjusted in accordance with the supply speed of the drying feeder 20 and the feeding force of the drying feeder 10. The delivery force of the drying feeder 10 is adjusted by the stagger angle of the paddle as described above.
【００２０】図５は、固形廃棄物の処理システムに本発
明の廃棄物の乾燥供給装置を装着した場合の他の実施例
を示す。図４との相違点は、前記均一混合体が前記熱分
解炉５２の流動層上方空間に供給されるように第２フィ
ーダ２０を含む場合の廃棄物の乾燥供給装置が取付けら
れていることである。熱分解炉５２内のガス圧は大気圧
より若干高く、第２フィーダ２０は前記熱分解炉５２内
の空間に面しているので、ガスシールは前記図５の実施
例の場合よりは難しい。しかし、前述のように、第２フ
ィーダ２０内に充満する前記均一混合体はかなり緻密で
あり、前記第２フィーダ２０と前記乾燥フィーダ１０を
連結する該乾燥フィーダ１０の出口ダクト３内を充満す
る前記均一混合体は高さヘッドを持たせることができ、
ガスシールは容易である。この場合も前記第２フィーダ
２０の供給速度と前記乾燥フィーダ１０の送出し力との
兼合いを充分にとらねばならない。FIG. 5 shows another embodiment in which the solid waste treatment system is equipped with the waste drying and feeding device of the present invention. The difference from FIG. 4 is that a drying and feeding device for waste in the case of including the second feeder 20 is attached so that the homogeneous mixture is fed to the space above the fluidized bed of the pyrolysis furnace 52. is there. Since the gas pressure in the pyrolysis furnace 52 is slightly higher than the atmospheric pressure, and the second feeder 20 faces the space in the pyrolysis furnace 52, gas sealing is more difficult than in the embodiment of FIG. However, as described above, the homogeneous mixture filling the second feeder 20 is quite dense and fills the outlet duct 3 of the drying feeder 10 connecting the second feeder 20 and the drying feeder 10. Said homogeneous mixture can have a height head,
Gas sealing is easy. In this case as well, a sufficient balance between the supply speed of the second feeder 20 and the sending force of the drying feeder 10 must be obtained.
【００２１】図６は、固形廃棄物の処理システムに本発
明の廃棄物の乾燥供給装置を装着した場合のさらに他の
実施例を示す。図５との相違点は第２フィーダがなく、
乾燥フィーダ１０の排出ダクト３がダクト２５を介して
熱分解炉５２の流動層上方空間に連通していることであ
る。この場合は、ダクト２５の通路抵抗を或る程度大き
くして前記乾燥フィーダ１０が前記混合体を常に押し出
すようにするが、前記乾燥フィーダ１０の出口ダクト３
をできるだけ長くして高さヘッドによるシール効果を得
るのがよい。FIG. 6 shows still another embodiment in which the solid waste treatment system is provided with the waste dry supply apparatus of the present invention. The difference from FIG. 5 is that there is no second feeder,
That is, the discharge duct 3 of the drying feeder 10 communicates with the space above the fluidized bed of the pyrolysis furnace 52 via the duct 25. In this case, the passage resistance of the duct 25 is increased to some extent so that the drying feeder 10 always pushes out the mixture, but the outlet duct 3 of the drying feeder 10
Should be as long as possible to obtain a sealing effect by the height head.
【００２２】[0022]
【発明の効果】以上説明したように、本発明によれば、
流動床炉内で高温になった熱流動媒体と廃棄物を混合攪
拌して廃棄物を効率的に乾燥粉砕し、粉砕小片化された
乾燥廃棄物と前記流動媒体との均一な混合体にして、流
動床炉に一定の速度で送込むことができるので、炉には
発熱量ばらつきの小さい廃棄物が一定の流量で供給され
ることになり、容易に安定な流動床炉の運転を可能にす
る、廃棄物供給時に炉内ガス漏れのない、別途乾燥用熱
源の必要のない、小型コンパクトな固形廃棄物乾燥供給
装置を提供できる。As described above, according to the present invention,
Mix and stir the hot fluidized medium and waste in a fluidized-bed furnace to efficiently dry-pulverize the waste to form a uniform mixture of the crushed and small-sized dried waste and the fluidized medium. The furnace can be fed into the fluidized-bed furnace at a constant speed, so waste with a small variation in calorific value is supplied to the furnace at a constant flow rate, enabling easy and stable operation of the fluidized-bed furnace. It is possible to provide a compact and compact solid waste drying and supply device that does not leak gas in the furnace when supplying waste and does not require a separate heat source for drying.
【図１】 本発明の第１実施例に係わる廃棄物の乾燥供
給装置の構成図で、(Ａ)は縦断面図、（Ｂ）は(Ａ)にお
けるＺ-Ｚ断面図である。FIG. 1 is a configuration diagram of an apparatus for drying and supplying waste according to a first embodiment of the present invention, where (A) is a longitudinal sectional view and (B) is a ZZ sectional view in (A).
【図２】 図１における乾燥フィーダの図解的な構造図
で、(Ａ)は縦断面図、（Ｂ）は（Ａ）におけるＸ−Ｘ断
面図、（Ｃ）は（Ａ）におけるＹ−Ｙ断面図である。FIG. 2 is a schematic structural view of a drying feeder in FIG. 1, wherein (A) is a longitudinal sectional view, (B) is an XX sectional view in (A), and (C) is YY in (A). It is sectional drawing.
【図３】 本発明に係わる乾燥フィーダのパドル形状を
第２実施例の形状とした場合の乾燥フィーダの図解的構
造図である。FIG. 3 is an illustrative structural view of a drying feeder in a case where a paddle shape of the drying feeder according to the present invention is the shape of the second embodiment.
【図４】 本発明の実施例に係わる廃棄物の乾燥供給装
置を固形廃棄物の処理システムにおける熱分解炉に適用
した一実施例を示す図である。FIG. 4 is a diagram showing an embodiment in which the waste drying and supplying apparatus according to the embodiment of the present invention is applied to a pyrolysis furnace in a solid waste processing system.
【図５】 本発明の実施例に係わる廃棄物の乾燥供給装
置を固形廃棄物の処理システムにおける熱分解炉に適用
した他の実施例を示す図である。FIG. 5 is a view showing another embodiment in which the waste dry supply apparatus according to the embodiment of the present invention is applied to a pyrolysis furnace in a solid waste treatment system.
【図６】 本発明の実施例に係わる廃棄物の乾燥供給装
置を固形廃棄物の処理システムにおける熱分解炉に適用
したさらに他の実施例を示す図である。FIG. 6 is a view showing still another embodiment in which the waste dry supply apparatus according to the embodiment of the present invention is applied to a pyrolysis furnace in a solid waste treatment system.
１ ケーシング ２ 入口ダクト ３ 出口ダクト ４、４' パドル軸 ５ 送りパドル ６ 攪拌パドル ７ モータ ８ 軸受け ９ 湿気ガス １０ 乾燥フィーダ １１ 供給口 １２ 排出口 ２０ 第２フィーダ ２１ スクリュー ２２ 流動層開口 ２３ モータ ３０ 熱分解炉 ３１ 流動層 Reference Signs List 1 casing 2 inlet duct 3 outlet duct 4, 4 'paddle shaft 5 feed paddle 6 stirring paddle 7 motor 8 bearing 9 wet gas 10 dry feeder 11 supply port 12 discharge port 20 second feeder 21 screw 22 fluidized bed opening 23 motor 30 heat Cracking furnace 31 Fluidized bed
───────────────────────────────────────────────────── フロントページの続き (72)発明者 堀添 浩俊 横浜市金沢区幸浦一丁目８番地１ 三菱重 工業株式会社横浜研究所内 (72)発明者 寺澤 良則 横浜市金沢区幸浦一丁目８番地１ 三菱重 工業株式会社横浜研究所内 (72)発明者 佐藤 淳 横浜市金沢区幸浦一丁目８番地１ 三菱重 工業株式会社横浜研究所内 Ｆターム(参考） 3K065 AA11 AA23 AB02 AB03 AC01 AC03 BA03 BA04 BA05 EA01 EA14 EA23 EA43 EA44 4D067 CB03 CB07 GA18 GA20 4G078 AA30 AB20 BA01 BA07 CA05 CA12 DA01 DB01 DB10 DC08 EA10 EA15 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hirotoshi Horizoe 1-8-1, Koura, Kanazawa-ku, Yokohama-shi Mitsubishi Heavy Industries, Ltd. Yokohama Research Laboratory (72) Inventor Yoshinori Terasawa 1-8-1, Koura, Kanazawa-ku, Yokohama-shi Mitsubishi Heavy Industries, Ltd. Yokohama Research Laboratory (72) Inventor Jun Sato 1-8-1, Koura, Kanazawa-ku, Yokohama-shi F-term (reference) in Mitsubishi Heavy Industries, Ltd. Yokohama Research Laboratory 3K065 AA11 AA23 AB02 AB03 AC01 AC03 BA03 BA04 BA05 EA01 EA14 EA23 EA43 EA44 4D067 CB03 CB07 GA18 GA20 4G078 AA30 AB20 BA01 BA07 CA05 CA12 DA01 DB01 DB10 DC08 EA10 EA15
Claims (7)
二軸の回転軸を夫々回転自在に枢支したケーシングの外
周面の一端側上面に廃棄物と熱流動媒体を供給する供給
口を設け、 前記外周面の他端側の下面に排出口を設け、 前記送りパドルは前記夫々の回転軸に前記供給口寄りに
固設して主として前記廃棄物と熱流動媒体の前記排出口
側への送りを行ない、 前記攪拌パドルは前記夫々の回転軸に前記排出口寄りに
固設して主として前記廃棄物と熱流動媒体の攪拌・粉砕
・混合を行ない、 前記供給口から供給された廃棄物を前記熱流動媒体の熱
によって乾燥させながら粉砕して前記熱流動媒体と均一
な混合体にして前記排出口に送り出す乾燥フィーダを含
むことを特徴とする廃棄物の乾燥供給装置。A supply port for supplying waste and a heat-fluid medium is provided on an upper surface on one end side of an outer peripheral surface of a casing rotatably supporting a biaxial rotary shaft having a plurality of feed paddles and a stirring paddle, respectively. A discharge port is provided on the lower surface on the other end side of the outer peripheral surface, and the feed paddles are fixed to the respective rotation shafts near the supply port and mainly feed the waste and the heat-fluid medium to the discharge port side. The stirring paddles are fixed to the respective rotation shafts near the discharge port to mainly perform stirring, pulverization, and mixing of the waste and the heat-fluid medium, and the waste supplied from the supply port is An apparatus for drying and supplying waste, comprising: a drying feeder for pulverizing while drying by the heat of a heat-fluid medium to form a uniform mixture with the heat-fluid medium and sending the mixture to the outlet.
記排出口に続設され前記均一混合体を流動床炉に供給す
る第２フィーダを含むことを特徴とする請求項１記載の
廃棄物の乾燥供給装置。2. The waste according to claim 1, further comprising a second feeder disposed below the drying feeder and connected to the outlet to supply the uniform mixture to a fluidized bed furnace. Drying supply device for goods.
元側より幅狭に形成したことを特徴とする請求項１記載
の廃棄物の乾燥供給装置。3. The apparatus for drying and supplying waste according to claim 1, wherein the tip side of the paddle of the drying feeder is formed narrower than the base side.
記排出口に続設され前記均一混合体を流動床炉に供給す
る第２フィーダの排出口が流動床炉の流動層に対面する
ように取付けたことを特徴とする請求項２記載の廃棄物
の乾燥供給装置。4. An outlet of a second feeder disposed below the drying feeder and connected to the outlet to supply the uniform mixture to the fluidized bed furnace faces the fluidized bed of the fluidized bed furnace. 3. The apparatus for drying and supplying waste according to claim 2, wherein the apparatus is mounted as described above.
記排出口に続設され前記均一混合体を流動床炉に供給す
る第２フィーダの排出口が流動床炉の流動層上方空間に
対面するように取付けたことを特徴とする請求項２記載
の廃棄物の乾燥供給装置。5. The discharge port of a second feeder, which is disposed below the drying feeder and is connected to the discharge port and supplies the uniform mixture to the fluidized bed furnace, is disposed in a space above the fluidized bed of the fluidized bed furnace. 3. The apparatus for drying and supplying waste according to claim 2, wherein the apparatus is mounted so as to face each other.
混合体を流動床炉の流動層上方空間に供給することを特
徴とする請求項１記載の廃棄物の乾燥供給装置。6. An apparatus according to claim 1, wherein said uniform mixture discharged from said drying feeder is supplied to a space above a fluidized bed of a fluidized bed furnace.
式のフィーダであることを特徴とする請求項２、５、６
のいずれか１項記載の廃棄物の乾燥供給装置。7. The feeder according to claim 2, wherein the second feeder is a screw conveyor type feeder.
The drying and supplying apparatus for waste according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000028399A JP3486385B2 (en) | 2000-02-04 | 2000-02-04 | Waste dry feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000028399A JP3486385B2 (en) | 2000-02-04 | 2000-02-04 | Waste dry feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001221419A true JP2001221419A (en) | 2001-08-17 |
| JP3486385B2 JP3486385B2 (en) | 2004-01-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000028399A Expired - Fee Related JP3486385B2 (en) | 2000-02-04 | 2000-02-04 | Waste dry feeder |
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| Country | Link |
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| JP (1) | JP3486385B2 (en) |
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| US7128004B2 (en) | 2003-04-30 | 2006-10-31 | Ebara Corporation | Supplying apparatus for supplying combustible material, a gasification apparatus for gasifying combustible material and method for gasifying combustible material |
| JP2012148281A (en) * | 2007-10-02 | 2012-08-09 | Shin Nichinan:Kk | Kneader |
| JP2013209438A (en) * | 2012-03-30 | 2013-10-10 | Ihi Corp | Fluidized bed system and biomass introduction method |
| JP2014083479A (en) * | 2012-10-22 | 2014-05-12 | Shin Nichinan:Kk | Kneading apparatus |
| US9702553B2 (en) | 2011-03-28 | 2017-07-11 | Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. | Waste material supply device and waste material processing device |
| CN108758652A (en) * | 2018-08-28 | 2018-11-06 | 淮安中科环保电力有限公司 | Garbage pre-heating desiccation apparatus |
| CN110925773A (en) * | 2019-12-13 | 2020-03-27 | 重庆科技学院 | Two segmentation waste drying and incineration disposal system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7128004B2 (en) | 2003-04-30 | 2006-10-31 | Ebara Corporation | Supplying apparatus for supplying combustible material, a gasification apparatus for gasifying combustible material and method for gasifying combustible material |
| JP2012148281A (en) * | 2007-10-02 | 2012-08-09 | Shin Nichinan:Kk | Kneader |
| US9702553B2 (en) | 2011-03-28 | 2017-07-11 | Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. | Waste material supply device and waste material processing device |
| JP2013209438A (en) * | 2012-03-30 | 2013-10-10 | Ihi Corp | Fluidized bed system and biomass introduction method |
| JP2014083479A (en) * | 2012-10-22 | 2014-05-12 | Shin Nichinan:Kk | Kneading apparatus |
| CN108758652A (en) * | 2018-08-28 | 2018-11-06 | 淮安中科环保电力有限公司 | Garbage pre-heating desiccation apparatus |
| CN110925773A (en) * | 2019-12-13 | 2020-03-27 | 重庆科技学院 | Two segmentation waste drying and incineration disposal system |
| CN110925773B (en) * | 2019-12-13 | 2024-03-22 | 重庆科技学院 | Two-section type waste drying and incineration treatment system |
| CN111054236A (en) * | 2020-01-06 | 2020-04-24 | 重庆科技学院 | Waste treatment device for strengthening premixing treatment |
| CN113757693A (en) * | 2021-08-09 | 2021-12-07 | 江苏金牛环保工程设备有限公司 | Dry salt secondary heating incineration system for solid-liquid treatment and use method thereof |
| CN113757693B (en) * | 2021-08-09 | 2022-12-13 | 江苏金牛环保工程设备有限公司 | Dry salt secondary heating incineration system for solid-liquid treatment and use method thereof |
| CN114110610A (en) * | 2021-10-20 | 2022-03-01 | 上海开能新技术工程有限公司 | Fly ash melting process of garbage power plant and plasma torch for heating fly ash melting process |
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| Publication number | Publication date |
|---|---|
| JP3486385B2 (en) | 2004-01-13 |
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