JPH089426B2 - Powder solid transportation method - Google Patents
Powder solid transportation methodInfo
- Publication number
- JPH089426B2 JPH089426B2 JP3197410A JP19741091A JPH089426B2 JP H089426 B2 JPH089426 B2 JP H089426B2 JP 3197410 A JP3197410 A JP 3197410A JP 19741091 A JP19741091 A JP 19741091A JP H089426 B2 JPH089426 B2 JP H089426B2
- Authority
- JP
- Japan
- Prior art keywords
- feeder
- hopper
- supply
- powder
- pressure
- 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.)
- Expired - Fee Related
Links
Landscapes
- Air Transport Of Granular Materials (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、粉末固体を定量的に搬
送する方法に係り、特に粉末固体を高圧系のガス化炉等
に安定に供給する粉末固体搬送方法に関する。The present invention relates relates to a method for transporting a powder solid quantitatively, to powder the solid transportable Okukata method particularly for supplying stable powdered solid to the gasifier or the like of the high-pressure system.
【０００２】[0002]
【従来の技術】従来、粉末固体を定量的に排出、搬送す
る手段としてロータリフィーダ、スクリュウフィーダ及
びテーブルフィーダ等の手段によって、各貯槽タンクか
ら定量的に排出させ自由落下させた後、搬送ガスで強制
的に搬送先へ供給する方式を採用した例が多い。代表的
な例を図５（特開昭５８−１６４６９２号公報）に示
す。図のように、常圧ホッパ２、中間加圧ホッパ５、供
給加圧ホッパ１０と各部を連結する連結管３２、延びち
じみ可能な収縮管３８、フィーダ１４及びホッパ加圧用
ガス導入系の電磁弁６、２０及び重量測定用のロードセ
ル７、１１から成り、常圧ホッパ２、中間加圧ホッパ
５、供給加圧ホッパ１０の順に接続されている。粉砕し
た原料粒子３はまず、常圧ホッパ２に入りホッパ２の下
に設置したバルブ４により、常圧にしている中間加圧ホ
ッパ５内に充填する。粒子で充満された中間加圧ホッパ
５は上、下に設置したバルブ４、バルブ８を閉じ、電磁
弁６から窒素または不活性ガスを導入して加圧する。一
方、供給加圧ホッパ１０は通常、原料粒子３を処理する
ガス化炉の圧力よりやや高めで常時運転し、圧力差によ
りガス化炉内へ粒子を気流輸送している。供給加圧ホッ
パ１０のレベルが所定値以下になったら中間加圧ホッパ
５下の粉末排出バルブ８を閉じ、供給加圧ホッパ１０へ
の移送を開始する。供給加圧ホッパ１０内には常時粉体
をためておく。中間加圧ホッパ５が空になったら、粉体
排出バルブ８を閉にした後、ガス抜き出し弁２２を開に
し、５内の圧力を常圧にした後、弁４を開にして常圧ホ
ッパ２から粒子３を供給する。これがロックホッパ方式
の乾式固体供給方式である。2. Description of the Related Art Conventionally, as means for quantitatively discharging and transporting powdered solids, such means as rotary feeders, screw feeders and table feeders have been quantitatively discharged from each storage tank and allowed to fall freely. In many cases, the method of forcibly supplying to the destination is adopted. A typical example is shown in FIG. 5 (JP-A-58-164692). As shown in the drawing, the normal pressure hopper 2, the intermediate pressure hopper 5, the supply pressure hopper 10 and the connecting pipe 32 for connecting the respective parts, the contractible pipe 38 that can be extended and folded, the feeder 14 and the electromagnetic gas of the hopper pressurizing gas introduction system. It is composed of valves 6 and 20 and load cells 7 and 11 for weight measurement, and is connected to a normal pressure hopper 2, an intermediate pressure hopper 5, and a supply pressure hopper 10 in this order. The pulverized raw material particles 3 first enter the normal pressure hopper 2 and are filled in the intermediate pressure hopper 5 kept at a normal pressure by a valve 4 installed below the hopper 2. The intermediate pressure hopper 5, which is filled with particles, closes the valves 4 and 8 installed above and below, and introduces nitrogen or an inert gas from the solenoid valve 6 to apply pressure. On the other hand, the supply pressurizing hopper 10 is normally operated at a pressure slightly higher than the pressure of the gasification furnace that processes the raw material particles 3, and the particles are pneumatically transported into the gasification furnace due to the pressure difference. When the level of the supply pressure hopper 10 becomes equal to or lower than a predetermined value, the powder discharge valve 8 under the intermediate pressure hopper 5 is closed, and the transfer to the supply pressure hopper 10 is started. The powder is constantly stored in the supply pressure hopper 10. When the intermediate pressure hopper 5 becomes empty, the powder discharge valve 8 is closed, the gas extraction valve 22 is opened, the pressure in 5 is set to normal pressure, and then the valve 4 is opened to open the normal pressure hopper. Particles 3 are supplied from 2. This is the lock hopper type dry solid supply system.
【０００３】この技術において、原料の湿り度、原料
の性状（粒径、充填密度、嵩密度及び付着性等）やホッ
パ出口構造等によるホッパ内でのブリッジ、ファンネル
フロー形成によって粒子の排出が不連続になる。定常
時、原料供給量の負荷変化時及び何等かの原因によるガ
ス化炉圧力の変動時においても原料を安定に供給するこ
と、原料を一定に制御することは至難であった。ま
た、原料を安定にガス化炉内に供給できないとガス化炉
内温度が変化したり、ガス化炉から生成するガス組成が
変動し、ガス化炉安定運転に悪影響を与える原因にもな
る。よって、これらの課題を回避し、安定に供給でき、
かつ原料供給量制御を効果的にできれば、ガス化炉安定
運転かつ運転操作性の向上を図る上で好適になる。In this technique, the discharge of particles is not possible due to the wetness of the raw material, the properties of the raw material (particle size, packing density, bulk density, adhesiveness, etc.) and the bridge and funnel flow formation in the hopper due to the outlet structure of the hopper. It will be continuous. It was extremely difficult to stably supply the raw material and to control the raw material at a constant rate even when the load of the raw material supply changed and when the gasification furnace pressure fluctuated due to some cause. Further, if the raw material cannot be stably supplied into the gasification furnace, the temperature in the gasification furnace changes, and the composition of the gas generated from the gasification furnace also fluctuates, which may cause an adverse effect on the stable operation of the gasification furnace. Therefore, these problems can be avoided and a stable supply can be achieved,
In addition, if the raw material supply amount can be effectively controlled, it will be suitable for stable operation of the gasification furnace and improvement of operability.
【０００４】従来、これらを安定に搬送する手段とし
て、下記に上げる方法が知られている。 （１）上記に対しては、バイブレータ、機械的手段
（攪拌翼または攪拌板）及びエアレーション等によって
ホッパ内粒子に流動を与える方式（特開昭５８−２２０
０２０号、同５８−２２００２１号各公報）。（２）供
給ホッパとロータリフィーダとの間に抽気室を設けるこ
とにより、ロータリフィーダ下方からの上昇ガスが抽気
管路から抽出されるため、粉粒体の定量供給が安定に行
われる方法（特開昭５２−１８９８５号公報）。 （３）粉粒体の定量性を保つために、供給ホッパ下部に
スクリュウフィーダ等の排出装置、流量弁及び供給ホッ
パの残量が確認できるようにレベル計等を設置すること
による定量搬送方法（特開昭５６−７５３２１号公
報）。等である。Conventionally, the following methods are known as means for stably conveying these. (1) In order to solve the above, a method of giving a flow to the particles in the hopper by a vibrator, mechanical means (stirring blade or stir plate), aeration, etc. (JP-A-58-220)
No. 020 and No. 58-220021). (2) By providing a bleeding chamber between the supply hopper and the rotary feeder, the rising gas from below the rotary feeder is extracted from the bleeding pipe line, so that a fixed amount of powder or granular material can be stably supplied. (Kaisho 52-18985). (3) In order to maintain the quantitative property of powder and granular material, a quantitative transfer method by installing a discharging device such as a screw feeder, a flow valve, and a level meter so that the remaining amount of the supply hopper can be confirmed under the supply hopper ( JP-A-56-75321). Etc.
【０００５】[0005]
【発明が解決しようとする課題】乾式供給方式により原
料を安定に供給する方式として前記の（１）、（２）、
（３）が知られている。ところで、（１）方式におい
て、ホッパとフィーダを組み合わせ、ホッパからの粒子
の排出を連続的に行うことにより安定搬送が達成される
が、付着性の強い原料（液化残渣等）に対しては、ホッ
パ内傾斜部に設置した流動化用ガス流通孔から少量のガ
ス（不活性ガス、窒素等）を流通しただけでは効果がな
く、多量のガスが必要なことから、ガス化炉内での温度
及びガス化効率等に悪影響を及ぼす危険性がある。ま
た、ホッパ内に攪拌器等の機械的手段を設置することも
効果的であるが、そのためのシール部構造が複雑になる
とともにコスト高になる欠点がある。As a method for stably supplying the raw material by the dry supply method, the above-mentioned (1), (2),
(3) is known. By the way, in the method (1), stable transportation can be achieved by combining a hopper and a feeder and continuously discharging particles from the hopper, but for a highly adherent raw material (liquefaction residue, etc.), Even if a small amount of gas (inert gas, nitrogen, etc.) is circulated through the fluidizing gas flow hole installed in the inclined part of the hopper, it is not effective, and a large amount of gas is required. Also, there is a risk of adversely affecting gasification efficiency. It is also effective to install a mechanical means such as a stirrer in the hopper, but there is a drawback that the structure of the seal portion for that purpose becomes complicated and the cost becomes high.
【０００６】また、（２）、（３）方式とも定量排出及
び搬送させるためには、ホッパ内の粒子が連続的、か
つ、定量的にフィーダ部へ落下することが重要である。
しかし、実際には、ホッパ出口構造、石炭の性状特に、
粒径、嵩密度及び付着性及び原料の湿り度等によってホ
ッパ内における流動性には差がある。ある炭種では定量
的に排出しても、ある炭種によってはホッパ内充填密度
や内壁部への付着等により、排出が不連続になる欠点が
あり、搬送条件（供給ホッパ圧力、搬送用ガス量）等が
一定にもかかわらず原料供給量が大幅に変化する問題が
生じた。そこで、本発明の目的は、供給ホッパからの原
料粒子の排出状態に影響されないで、安定に供給できか
つ供給量制御が容易にできる粉体搬送装置及び方法を提
供するにある。Further, in both the methods (2) and (3), in order to discharge and convey a fixed amount, it is important that the particles in the hopper continuously and quantitatively drop to the feeder section.
However, in practice, the hopper outlet structure, the properties of coal,
There is a difference in fluidity in the hopper depending on the particle size, bulk density, adhesiveness, wetness of the raw material and the like. Even if a certain coal type is discharged quantitatively, depending on the coal type, discharge is discontinuous due to the packing density in the hopper and adhesion to the inner wall, etc. However, there was a problem that the amount of raw material supply changed drastically even though the amount was constant. Therefore, an object of the present invention is to provide a powder conveying device and method that can stably supply the raw material particles and can easily control the supply amount without being affected by the discharge state of the raw material particles from the supply hopper.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
には、本発明では、一つの常圧ホッパと二つの加圧ホッ
パ、粉末固体排出用のフィーダ及び混合器を一列に備
え、ロックホッパ方式で粉末固体を搬送する粉末固体搬
送方法において、前記フィーダとして定量排出用の第１
フィーダと供給量調節用の第２フィーダとを備え、該第
１フィーダと第２フィーダの最大排出容量を、第２フィ
ーダより第１フィーダを大きくし、前記第１フィーダと
第２フィーダの間にいつ流連結管を設け、該いつ流連結
管の外壁に重量測定用のロードセルと充填レベル確認用
の差圧計を備えて、粉末固体の搬送量の制御を、該ロー
ドセルと差圧計の信号により、いつ流連結管内の粉末固
体充填量が増減した場合には、第１フィーダの回転数を
調節していつ流連結管内の粉末固体の充填レベルを一定
に維持し、いつ流連結管内の充填量及び充填レベルが一
定にもかかわらず供給量が変化する場合には、第２フィ
ーダの回転数を調節して行うことを特徴とする粉末固体
搬送方法としたものである。 In order to achieve the above object, according to the present invention, one normal pressure hopper and two pressure hoppers are used.
A line of feeders, a feeder for discharging solid powder and a mixer
, The powder solid transporter that transports powder solids by the lock hopper method.
In the feeding method, the first one for fixed amount discharge as the feeder
A feeder and a second feeder for adjusting the supply amount are provided.
Set the maximum discharge capacity of the 1st feeder and the 2nd feeder to the 2nd feeder.
The first feeder larger than the feeder,
When the flow connection pipe is provided between the second feeder and the time connection
Load cell on the outer wall of the tube for weighing and confirmation of filling level
Equipped with a differential pressure gauge to control the amount of powder solids conveyed.
The signal from the dowel and differential pressure gauge causes
If the body filling amount increases or decreases, change the rotation speed of the first feeder.
Adjust when to keep the powder solids filling level in the flow connection tube constant
To ensure that the filling volume and filling level in the
If the supply amount changes despite the
Powder solid characterized by adjusting the rotation speed of the feeder
This is a transportation method.
【０００８】上記のように、本発明は、石炭の性状及び
ホッパ出口構造によるホッパからの不連続排出の影響等
によらず、原料供給量を安定に制御する手段として、ホ
ッパ下部に定量排出用のフィーダ（以下、第１フィーダ
と称す）と供給量調節用のフィーダ（以下、第２フィー
ダと称す）を上下に設置し、その第１フィーダと第２フ
ィーダの間に常時、あるレベルで粒子が充填するいつ流
連結管からなる原料供給装置を設置することにより、圧
力の高い炉へ安定に連続供給できるようにしたものであ
る。As described above, according to the present invention, as a means for stably controlling the raw material supply amount, regardless of the properties of coal and the influence of discontinuous discharge from the hopper due to the hopper outlet structure, a fixed amount discharge is made at the bottom of the hopper. A feeder (hereinafter, referred to as the first feeder) and a feeder for adjusting the supply amount (hereinafter, referred to as the second feeder) are installed at the upper and lower sides, and particles are always provided at a certain level between the first feeder and the second feeder. By installing a raw material supply device consisting of a sewage-flow connecting pipe to be filled with, it is possible to stably and continuously supply the raw material to a high-pressure furnace.
【０００９】すなわち、供給ホッパ下部に第１フィーダ
と第２フィーダを上下に設置する。第１フィーダは、ホ
ッパからの排出のみに使用し、第２フィーダは、原料供
給量の調節用として使用する。その第１フィーダと第２
フィーダの間に常時、あるレベルの原料粒子を充填する
いつ流連結管を設置する。そのいつ流連結管の外壁に
は、重量測定用のロードセル及び粒子充填レベルを検知
する差圧計を備え、いつ流連結管内の充填重量及び充填
レベルがある設定値に対して変化した場合には、第１フ
ィーダの回転数を調節することにより、充填レベルを一
定に維持する。また、いつ流連結管内の充填量及び充填
レベルが一定にもかかわらず供給量が変化する場合に
は、第２フィーダの回転数を調節することにより供給量
を制御するものである。よって、いつ流連結管内に常時
原料粒子を充填することにより、粉末固体を安定に圧力
の高い炉等に供給可能にしたものである。That is, the first feeder and the second feeder are installed vertically below the supply hopper. The first feeder is used only for discharging from the hopper, and the second feeder is used for adjusting the raw material supply amount. The first feeder and the second
Always install a continuous flow connecting pipe between the feeders to fill a certain level of raw material particles. The outer wall of the flow connecting pipe is provided with a load cell for weighing and a differential pressure gauge for detecting the particle filling level, and when the fill weight and the filling level in the flow connecting pipe change with respect to a certain set value, The filling level is kept constant by adjusting the rotation speed of the first feeder. Further, when the supply amount changes when the filling amount and the filling level in the flow connection pipe are constant, the supply amount is controlled by adjusting the rotation speed of the second feeder. Therefore, by constantly filling the raw material particles in the flow connecting pipe, the powder solid can be stably supplied to a furnace or the like having a high pressure.
【００１０】[0010]
【作用】本発明の粉末固体搬送方法は、第１フィーダと
第２フィーダを上下に設置したものである。すなわち、
供給ホッパ下部に排出用のフィーダと供給量調節用のフ
ィーダを上下に設置する。第１フィーダは、ホッパから
の排出のみに使用し、第２フィーダは、原料供給量の調
節用として使用する。その第１フィーダと第２フィーダ
の間に、常時あるレベルで粒子が充填するいつ流連結管
を設置した。そのいつ流連結管の外壁には、重量測定用
のロードセル及び粒子充填レベルを検知する差圧計を設
置した。いつ流連結管内の充填重量及び充填レベルがあ
る設定値よりも増減した場合には、第１フィーダの回転
数を調節することにより、充填レベルを一定に維持す
る。また、いつ流連結管内の充填量及び充填レベルが一
定にもかかわらず供給量が変化する場合には、第２フィ
ーダの回転数を調節することにより供給量を制御するも
のである。したがって、フィーダを複数個設置し、いつ
流連結管内に常時粉体が充満させることによって、ホッ
パ側におけるブリッジ及びファンネルフロー等の形成に
よる不連続排出の影響による供給量不安定化が解除で
き、安定に搬送できるとともに供給量制御が容易にでき
るように図ったものである。In the powder solid conveying method of the present invention, the first feeder and the second feeder are arranged vertically. That is,
A feeder for discharging and a feeder for adjusting the supply amount are installed vertically below the supply hopper. The first feeder is used only for discharging from the hopper, and the second feeder is used for adjusting the raw material supply amount. Between the first feeder and the second feeder, an all-time connecting pipe, which is always filled with particles at a certain level, was installed. A load cell for weighing and a differential pressure gauge for detecting the particle filling level were installed on the outer wall of the flue-flow connecting pipe. When the filling weight and filling level in the flow connecting pipe increase or decrease above a certain set value, the filling level is kept constant by adjusting the rotation speed of the first feeder. Further, when the supply amount changes when the filling amount and the filling level in the flow connection pipe are constant, the supply amount is controlled by adjusting the rotation speed of the second feeder. Therefore, by installing multiple feeders and filling the flow connection pipes with powder at all times, instability of the supply amount due to the effect of discontinuous discharge due to the formation of bridges and funnel flows on the hopper side can be eliminated, and stable It is possible to easily control the supply amount while being able to convey the sheet.
【００１１】[0011]
【実施例】以下、本発明を図面を用いて説明するが、本
発明はこれらの実施例に限定されない。 実施例１ 図１は、本発明の方法に用いる原料供給装置の概略図で
ある。本発明の詳細を図１にしたがって説明する。本装
置は図のように、常圧ホッパ２、中間加圧ホッパ５、供
給加圧ホッパ１０と各部を連結する連結管３２、延びち
じみ可能な収縮管３８、フィーダ１３、及び１４及びホ
ッパ加圧用ガス導入系の電磁弁６、２０及び重量測定用
のロードセル７、１１から成り、常圧ホッパ２、中間加
圧ホッパ５、供給加圧ホッパ１０の順に接続されてい
る。The present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments. Example 1 Figure 1 is a schematic diagram of RuHara charge supply device used in the method of the present invention. The details of the present invention will be described with reference to FIG. As shown in the drawing, the present apparatus includes a normal pressure hopper 2, an intermediate pressure hopper 5, a supply pressure hopper 10, a connecting pipe 32 for connecting each part, a contractible pipe 38 that can be extended and folded, feeders 13 and 14 and a hopper addition. It is composed of solenoid valves 6 and 20 of a pressure gas introduction system and load cells 7 and 11 for weight measurement, which are connected in order of a normal pressure hopper 2, an intermediate pressure hopper 5, and a supply pressure hopper 10.
【００１２】 各ホッパへの原料粒子３の移送操作につい
て、以下説明する。粉砕された原料粒子３はまず、常圧
ホッパ２に入りホッパ２の下に設置したバルブ４によ
り、常圧にしている中間加圧ホッパ５内に充填する。粒
子で充満された中間加圧ホッパ５は上、下に設置したバ
ルブ４、バルブ８を閉じ、電磁弁６から窒素または不活
性ガスを導入して加圧する。一方、供給加圧ホッパ１０
は通常、原料粒子３を処理するガス化炉の圧力よりやや
高めで常時運転し、圧力差によりガス化炉内へ粒子を気
流輸送している。供給加圧ホッパ１０のレベルが所定値
以下になったら中間加圧ホッパ５下の粉体排出バルブ８
を開にし、供給加圧ホッパ１０への移送を開始する。供
給加圧ホッパ１０内には常時粉体をためておく。中間加
圧ホッパ５が空になったら、粉体排出バルブ８を閉にし
た後、ガス抜き出し弁２２を開にし、５内の圧力を常圧
にした後、弁４を開にして常圧ホッパ２から粒子３を供
給する。 供給加圧ホッパ１０には、上記原料粒子３を
充填するためのいつ流管３２、圧力調節弁９、加圧用ガ
ス電磁弁２０、重量測定用のロードセル１１、粉体排出
用フィーダ１３、いつ流連結管１５、原料供給量調節用
フィーダ１４等を備えている。また、フィーダ１４下部
には窒素又は不活性ガス等２４を供給し、原料粒子３を
搬送するための粉体供給室（混合器又はエダクタ）２６
を設けている。 The operation of transferring the raw material particles 3 to each hopper will be described below. The crushed raw material particles 3 first enter the normal pressure hopper 2 and are filled in the intermediate pressure hopper 5 kept at a normal pressure by a valve 4 installed below the hopper 2. The intermediate pressure hopper 5, which is filled with particles, closes the valves 4 and 8 installed above and below, and introduces nitrogen or an inert gas from the solenoid valve 6 to apply pressure. On the other hand, the supply pressure hopper 10
Normally operates at a pressure slightly higher than that of the gasification furnace that processes the raw material particles 3, and the particles are pneumatically transported into the gasification furnace due to the pressure difference. When the level of the supply pressure hopper 10 becomes lower than a predetermined value, the powder discharge valve 8 under the intermediate pressure hopper 5
Is opened and the transfer to the supply pressure hopper 10 is started. The powder is constantly stored in the supply pressure hopper 10. When the intermediate pressure hopper 5 becomes empty, the powder discharge valve 8 is closed, the gas extraction valve 22 is opened, the pressure in 5 is set to normal pressure, and then the valve 4 is opened to open the normal pressure hopper. Particles 3 are supplied from 2. The supply pressurizing hopper 10 has a flow tube 32 for filling the raw material particles 3, a pressure control valve 9, a pressurizing gas solenoid valve 20, a load measuring load cell 11, a powder discharging feeder 13, and a flow path. It is provided with a connecting pipe 15, a raw material supply amount adjusting feeder 14, and the like. Further, a powder supply chamber (mixer or eductor) 26 for supplying the raw material particles 3 by supplying nitrogen or an inert gas 24 to the lower part of the feeder 14
Is provided.
【００１３】この供給加圧ホッパ１０下部の詳細図を図
２に示し、本図を用いて本発明を詳細に説明する。図２
は、加圧供給ホッパ１０、排出用フィーダ（第１フィー
ダ）１３、いつ流連結管１５、供給量調節用フィーダ
（第２フィーダ）１４より構成される。以下、その操作
手順について説明する。供給ホッパ１０から原料粒子３
を排出させるためのフィーダ１３によって、自由落下さ
せ、１３の下部に設置したいつ流連結管１５に供給す
る。フィーダ１３は、加圧供給ホッパ１０内における粉
体の排出状態に影響されても、ある一定量を排出させる
だけでよい。いつ流連結管１５内には、常に１３より原
料粒子３を供給し、１５内の充填量があるレベルで一定
になるように、１３により調節する。いつ流連結管１５
の外壁には、重量測定用のロードセル３６と充填レベル
測定用の差圧計１８を有する。また、１５上下部には、
１３、１４、フィーダ部の振動、重量等の影響を受けな
いように収縮管３７を有する。１５の下部には、原料供
給量調節用のフィーダ１４を設置し、原料の供給量を調
節し、自由落下させた後エダクタ２６に供給し、搬送用
ガス（不活性ガス又は窒素ガス）２４によりガス化炉に
供給する。A detailed view of the lower part of the supply pressure hopper 10 is shown in FIG. 2, and the present invention will be described in detail with reference to this drawing. Figure 2
Is composed of a pressure supply hopper 10, a discharge feeder (first feeder) 13, a flow connection pipe 15, and a supply amount adjusting feeder (second feeder) 14. The operation procedure will be described below. Raw material particles 3 from supply hopper 10
It is made to fall freely by a feeder 13 for discharging, and is supplied to an irreversible flow connecting pipe 15 installed at the lower part of 13. Even if the feeder 13 is affected by the discharge state of the powder in the pressure supply hopper 10, it only needs to discharge a certain amount. When the raw material particles 3 are always supplied from 13 into the flow connection pipe 15, the filling amount in 15 is adjusted by 13 so that the filling amount becomes constant at a certain level. When flow connecting pipe 15
A load cell 36 for measuring the weight and a differential pressure gauge 18 for measuring the filling level are provided on the outer wall of the. Also, 15 upper and lower parts,
A contraction tube 37 is provided so as not to be affected by vibrations, weights, etc. of the feeders 13, 14. A feeder 14 for adjusting the supply amount of the raw material is installed in the lower part of 15, the supply amount of the raw material is adjusted, and the raw material is supplied to the eductor 26 after being dropped freely. Supply to gasification furnace.
【００１４】１４と１３のフィーダの最大排出容量は、
かならず１３＞１４とし、いつ流連結管１５内の重量又
は充填レベルをかならず一定に維持する。もし１５内の
レベルが何等かの原因で低くなった場合には、１３の回
転数を設定回転数よりも多くし、供給ホッパ１０からの
排出量を増大させる。また、レベルが高くなった場合に
は、フィーダ１３の回転数を少なくするか一時的に停止
し、レベルが設定値に近ずくまでその状態を維持する。
また、いつ流管内の充填量及び充填レベルが一定にもか
かわらず供給量が変化した場合には、第２フィーダの回
転数を調節することにより供給量を制御し、粉末固体を
安定に圧力の高い炉等に供給可能にしたものである。フ
ィーダ１４からの排出量が定常であるか否かの判断は、
ロードセル３６による充填重量や差圧計１９により差圧
レベルを監視する。The maximum discharge capacity of the 14 and 13 feeders is
Make sure that 13> 14 so that the weight or fill level in the flow connecting pipe 15 is always kept constant. If the level in 15 becomes low for some reason, the rotation speed of 13 is made higher than the set rotation speed, and the discharge amount from the supply hopper 10 is increased. When the level becomes high, the number of rotations of the feeder 13 is reduced or temporarily stopped, and the state is maintained until the level approaches the set value.
Further, when the supply amount changes when the filling amount and the filling level in the flow tube are constant, the feeding amount is controlled by adjusting the rotation speed of the second feeder to stabilize the powder solid pressure. It can be supplied to high furnaces. Whether the discharge amount from the feeder 14 is steady is determined by
The filling weight of the load cell 36 and the differential pressure level are monitored by the differential pressure gauge 19.
【００１５】従来の供給ホッパ１０下部に排出用及び原
料供給量調節用両方の機能を備えたフィーダを１個設置
した時の原料供給量の変化状況を図３に示す。図のよう
に、ある時間では、設定値に対して変化は少ないが、あ
る所では供給量が多くなったり少なくなったりして、変
化が激しくなり、安定な供給量制御が不可能であった。
その理由として、前述したようにホッパ出口構造及び使
用原料の性状等の影響による流動性の悪化に起因するた
めと考える。そこで、フィーダの役割を排出用と原料供
給量調節用に分割し、常時原料供給量調節用フィーダに
定量的に供給さえすれば、上記欠点による影響を抑制さ
れ安定に制御できるのではないかと考え、本発明の方式
にした。その結果を図４に示す。図４のように、図３に
比べて設定値に対する変動も少なく、その結果が有効で
あることがわかった。FIG. 3 shows changes in the raw material supply amount when one feeder having both functions for discharging and adjusting the raw material supply amount is installed below the conventional supply hopper 10. As shown in the figure, at a certain time, there was little change with respect to the set value, but at some places the supply amount increased or decreased, the change became severe, and stable supply amount control was impossible. .
The reason for this is considered to be that the fluidity deteriorates due to the effects of the hopper outlet structure and the properties of the raw materials used, as described above. Therefore, if the role of the feeder is divided into one for discharging and one for adjusting the raw material supply amount, and if the material is constantly supplied quantitatively to the raw material supply amount adjusting feeder, the effects of the above defects may be suppressed and stable control is possible. The method of the present invention is adopted. The results are shown in FIG. As shown in FIG. 4, the variation with respect to the set value was smaller than that in FIG. 3 , and the result was found to be effective.
【００１６】[0016]
【発明の効果】本発明によれば、フィーダを供給ホッパ
下部に直列に複数個設置し、フィーダの間にある一定レ
ベルに原料粒子が充満した容器を設置することにより、
流入側における粒子の停滞による排出不連続の影響もな
く、定量的に排出し、供給量を容易に制御でき、安定し
た搬送が可能になるという作用効果がある。EFFECTS OF THE INVENTION According to the present invention, a plurality of feeders are installed in series at the lower part of the supply hopper, and a container filled with raw material particles at a certain level between the feeders is installed.
There is no effect of discharge discontinuity due to stagnation of particles on the inflow side, there is an effect that discharge is performed quantitatively, the supply amount can be easily controlled, and stable conveyance is possible.
【図１】本発明を原料供給系に設置した時の概略図であ
る。FIG. 1 is a schematic diagram when the present invention is installed in a raw material supply system.
【図２】本発明の粉体搬送装置の部分断面図である。FIG. 2 is a partial cross-sectional view of the powder conveying device of the present invention.
【図３】従来法による供給量制御の結果を示すグラフで
ある。FIG. 3 is a graph showing a result of supply amount control by a conventional method.
【図４】本発明の粉体搬送装置を設置した時の供給量制
御の結果を示すグラフである。FIG. 4 is a graph showing a result of supply amount control when the powder carrying device of the present invention is installed.
【図５】従来法の原料供給系の概略図である。FIG. 5 is a schematic view of a raw material supply system of a conventional method.
１．原料送入管 ２．常圧ホッパ ３．原料粒子 ４．バルブ ５．中間加圧ホッパ ６．電磁弁 ７．ロードセル ８．バルブ ９．供給加圧ホッパ圧力調節弁 １０．供給加圧
ホッパ １１．ロードセル １２．自動開閉
バルブ １３．排出用フィーダ（第１フィーダ）１４．原料供給
量調節用フィーダ（第２フィーダ） １５．いつ流連結管 １６．排出用フ
ィーダ用モータ １６′．フィーダ用モータ １７．差圧取り
だし配管 １８．差圧計Ｉ １９．差圧計Ｉ
Ｉ ２０．加圧用ガス電磁弁 ２１．供給加圧
ホッパ内ガス排出管 ２２．排出用電磁弁 ２２′．排出用
電磁弁 ２３．排出管 ２４．搬送用ガス（不活性ガス又は窒素） ２５．原料搬送管 ２６．エダクタ
（混合器） ２７．第１フィーダ内ロータ ２８．第２フィ
ーダ内ロータ ２９．洩れガス抜きバルブ ２９′．洩れガ
ス抜きバルブ ３０．洩れガス抜きバルブ ３１．洩れガス
抜き管 ３２．連結管 ３３．中間加圧
ホッパレベル計 ３４．供給加圧ホッパレベル計 ３５．ガス化炉 ３６．いつ流管部ロードセル ３７．収縮管 ３８．ホッパ連結用収縮管 ３９．微調節用
フィーダ ４０．微調節用フィーダ部ロータ1. Raw material inlet pipe 2. Normal pressure hopper 3. Raw material particles 4. Valve 5. Intermediate pressure hopper 6. Solenoid valve 7. Load cell 8. Valve 9. Supply pressurization hopper pressure control valve 10. Supply pressure hopper 11. Load cell 12. Automatic opening / closing valve 13. Discharge feeder (first feeder) 14. Feeder for adjusting the amount of raw material supply (second feeder) 15. When flow connection pipe 16. Discharge feeder motor 16 '. Motor for feeder 17. Differential pressure extraction piping 18. Differential pressure gauge I 19. Differential pressure gauge I
I 20. Gas solenoid valve for pressurization 21. Gas discharge pipe in supply pressure hopper 22. Discharge solenoid valve 22 '. Solenoid valve for discharge 23. Discharge pipe 24. Carrier gas (inert gas or nitrogen) 25. Raw material transfer pipe 26. Eductor (mixer) 27. Rotor in first feeder 28. Second feeder internal rotor 29. Leakage gas vent valve 29 '. Leakage gas release valve 30. Leakage gas release valve 31. Leakage gas vent pipe 32. Connection pipe 33. Intermediate pressure hopper level meter 34. Supply pressure hopper level meter 35. Gasification furnace 36. When flow tube load cell 37. Shrink tube 38. Shrink tube for connecting hopper 39. Fine adjustment feeder 40. Fine adjustment feeder section rotor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高橋 貞夫 茨城県日立市久慈町4026番地 株式会社日 立製作所 日立研究所内 (72)発明者 植田 昭雄 広島県呉市宝町３番36号 バブコック日立 株式会社呉研究所内 (56)参考文献 特開 昭60−101192（ＪＰ，Ａ) 特開 昭58−113037（ＪＰ，Ａ) 特開 昭58−69631（ＪＰ，Ａ) 特開 昭63−1634（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Sadao Takahashi 4026 Kujimachi, Hitachi City, Hitachi, Ibaraki Prefecture Hitachi Research Laboratory, Hitachi Ltd. (72) Akio Ueda 3-36 Takaracho, Kure City, Hiroshima Prefecture Babcock Hitachi Ltd. Kure Research Institute (56) Reference JP-A-60-101192 (JP, A) JP-A-58-113037 (JP, A) JP-A-58-69631 (JP, A) JP-A-63-1634 (JP, A)
Claims (1)
粉末固体排出用のフィーダ及び混合器を一列に備え、ロ
ックホッパ方式で粉末固体を搬送する粉末固体搬送方法
において、前記フィーダとして定量排出用の第１フィー
ダと供給量調節用の第２フィーダとを備え、該第１フィ
ーダと第２フィーダの最大排出容量を、第２フィーダよ
り第１フィーダを大きくし、前記第１フィーダと第２フ
ィーダの間にいつ流連結管を設け、該いつ流連結管の外
壁に重量測定用のロードセルと充填レベル確認用の差圧
計を備えて、粉末固体の搬送量の制御を、該ロードセル
と差圧計の信号により、いつ流連結管内の粉末固体充填
量が増減した場合には、第１フィーダの回転数を調節し
ていつ流連結管内の粉末固体の充填レベルを一定に維持
し、いつ流連結管内の充填量及び充填レベルが一定にも
かかわらず供給量が変化する場合には、第２フィーダの
回転数を調節して行うことを特徴とする粉末固体搬送方
法。1. One normal pressure hopper and two pressure hoppers,
A powder solids conveying method in which a powder solids discharging feeder and a mixer are provided in a row, and the powder solids are conveyed by a lock hopper method. In the powder solids conveying method, a fixed amount discharging first feeder and a supply amount adjusting second feeder are used as the feeders. Prepare for the first file
The maximum discharge capacity of the feeder and the second feeder,
The first feeder and the second feeder are enlarged.
A time connecting pipe is provided between the feeders and the outside of the time connecting pipe is
Load cell on the wall for weighing and differential pressure for checking the filling level
The load cell is equipped with a meter to control the amount of powder solids conveyed.
And the signal of the differential pressure gauge, the powder solid filling in the flow connection pipe
If the quantity increases or decreases, adjust the rotation speed of the first feeder.
Maintains a constant filling level of powdered solids in the flow tube
However, at any time, the filling amount and filling level in the flow connecting pipe can be kept constant.
If the supply amount changes regardless of the
A method for conveying powder solids, which is characterized in that the number of revolutions is adjusted .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3197410A JPH089426B2 (en) | 1991-07-12 | 1991-07-12 | Powder solid transportation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3197410A JPH089426B2 (en) | 1991-07-12 | 1991-07-12 | Powder solid transportation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0517030A JPH0517030A (en) | 1993-01-26 |
| JPH089426B2 true JPH089426B2 (en) | 1996-01-31 |
Family
ID=16374054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3197410A Expired - Fee Related JPH089426B2 (en) | 1991-07-12 | 1991-07-12 | Powder solid transportation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089426B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002338972A (en) * | 2001-05-15 | 2002-11-27 | Babcock Hitachi Kk | Apparatus for supplying pulverized coal in coal gasification plant |
| JP5210838B2 (en) * | 2008-12-10 | 2013-06-12 | 三菱重工業株式会社 | Rotary cooling and conveying device for high temperature granular fluid |
| KR101254668B1 (en) * | 2012-09-07 | 2013-04-15 | (주) 화승소재 | Manufacturing system, ecofriendly pneumatic plug conveying system and materials conveying method for preparing carbon master batch |
| KR101709866B1 (en) * | 2015-09-24 | 2017-02-23 | 한국전력공사 | Apparatus of rotary coupling and gasification system having the same |
| JP7207285B2 (en) * | 2019-12-19 | 2023-01-18 | トヨタ自動車株式会社 | Core molding machine |
| JP6948665B1 (en) * | 2020-06-29 | 2021-10-13 | 株式会社チダエンジニアリング | Powder and granular material pumping supply device |
| JP7717660B2 (en) * | 2022-04-25 | 2025-08-04 | 日鉄エンジニアリング株式会社 | Powder and granular material conveying device and powder and granular material conveying method |
| JP7479089B1 (en) * | 2023-04-05 | 2024-05-08 | 精研工業株式会社 | Rotary Valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA826368B (en) * | 1981-09-25 | 1983-07-27 | Union Carbide Corp | Process for transferring solids |
| JPS58113037A (en) * | 1981-12-25 | 1983-07-05 | Hitachi Plant Eng & Constr Co Ltd | Powder accumulate and discharge apparatus |
| JPS60101192A (en) * | 1983-11-07 | 1985-06-05 | Hitachi Ltd | Powder feeding device |
| JPS631634A (en) * | 1986-06-18 | 1988-01-06 | Kobe Steel Ltd | Continuous feed control for powder |
-
1991
- 1991-07-12 JP JP3197410A patent/JPH089426B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517030A (en) | 1993-01-26 |
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