JPH0440228A - Apparatus for cooling fine powder - Google Patents
Apparatus for cooling fine powderInfo
- Publication number
- JPH0440228A JPH0440228A JP14612490A JP14612490A JPH0440228A JP H0440228 A JPH0440228 A JP H0440228A JP 14612490 A JP14612490 A JP 14612490A JP 14612490 A JP14612490 A JP 14612490A JP H0440228 A JPH0440228 A JP H0440228A
- Authority
- JP
- Japan
- Prior art keywords
- fine powder
- fluidized bed
- coarse particles
- high temp
- air
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 71
- 238000001816 cooling Methods 0.000 title claims abstract description 30
- 239000011362 coarse particle Substances 0.000 claims abstract description 28
- 238000009792 diffusion process Methods 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1836—Heating and cooling the reactor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の用分野〕
本発明は、乾式排ガス処理装置の補集飛灰再利用に適用
される補集飛灰冷却装置、又はファインセラミックス気
相合成、石灰飛灰趙高温微粒子化もしくは粉末食品製造
過程における微粉体冷却装置等の微粉体冷却装置に関す
る。Detailed Description of the Invention [Industrial Field] The present invention relates to a collected fly ash cooling device applied to the collected fly ash reuse of a dry exhaust gas treatment device, or to fine ceramics vapor phase synthesis, lime fly ash The present invention relates to a fine powder cooling device such as a fine powder cooling device in the Zhao high temperature atomization or powdered food manufacturing process.
従来、高温粉体中に冷却空気を混入して冷却する装置が
広く用いられており、また、伝熱効率を上げるために被
冷却粉体によって流動層を構成する装置もあった（例え
ば、特開昭４７−２２３８０号高温度に加熱された粉体
の冷却装置、特開昭５３−５９９３５号粉体の電気抵抗
加熱装置等）。Conventionally, devices that mix cooling air into high-temperature powder to cool it have been widely used, and there are also devices that form a fluidized bed with the powder to be cooled to increase heat transfer efficiency (for example, (No. 47-22380: Cooling device for powder heated to high temperature, JP-A No. 53-59935: Electric resistance heating device for powder, etc.)
冷却空気を高温粉体中に混合する前記の従来の装置では
、空気と粉体の接触時間を長くとる必要から、装置が大
型となる。In the above-mentioned conventional apparatus for mixing cooling air into high-temperature powder, the apparatus becomes large because it is necessary to allow a long contact time between the air and the powder.
また、被冷却粉体により流動層を形成し、粉体滞留時間
を延ばして装置の小型化をはかるようにした前記の従来
の装置では、流動化条件と粉体搬出条件の両方を満足す
る空塔速度の選定は難しい。In addition, in the conventional apparatus described above, which aims to downsize the apparatus by forming a fluidized bed with the powder to be cooled and extending the powder residence time, it is necessary to create a fluidized bed that satisfies both the fluidization conditions and the powder discharge conditions. Selection of tower speed is difficult.
長期安定運転を行うためには、搬出条件を優先させるこ
とが必要であり、これでは十分な流動層を形成すること
はできないので、装置の小型化には限界がある。In order to perform long-term stable operation, it is necessary to prioritize the discharge conditions, and since it is not possible to form a sufficient fluidized bed with this, there is a limit to the miniaturization of the apparatus.
本発明は、従来の粉体の冷却装置のもつ以上の問題点を
解決することができる微粉体の冷却装置を提供しようと
するものである。SUMMARY OF THE INVENTION The present invention aims to provide a fine powder cooling device that can solve the problems more than those of conventional powder cooling devices.
本発明の微粉体冷却装置は、粗粒子より成る流動層内に
設置された冷却管、及び圧縮空気が噴出され高温の微粉
体を吸引する空気エゼクタと同空気エゼクタの出口に連
接され前記流動層に開口する拡散室とを有する微粉体供
給設備を具備する。The fine powder cooling device of the present invention includes a cooling pipe installed in a fluidized bed made of coarse particles, an air ejector from which compressed air is blown out and sucks high-temperature fine powder, and an air ejector that is connected to the outlet of the air ejector and connected to the fluidized bed. The apparatus is equipped with a fine powder supply facility having a diffusion chamber opened to the
本発明では、流動層を形成し流動運動を行なっている粗
粒子は、流動層内に配置されている冷却管と熱交換を行
っている。圧縮空気が噴出される空気エゼクタにより吸
引された高温微粉体は、同空気エゼクタ出口に連接され
た拡散室において均一に分布され、同拡散室より流動層
内にむらなく供給される。高温微粉体は、流動する粗粒
子と共に流動運動し、粗粒子及び冷却管と熱交換して効
果的に冷却される。冷却された高温微粉体は、外部に排
出される流動用空気により容品に流動層から搬出される
。一方、粗粒子は、流動用空気に同伴されず流動層内に
留まる。In the present invention, coarse particles forming a fluidized bed and undergoing fluid movement exchange heat with cooling pipes arranged within the fluidized bed. The high-temperature fine powder sucked by the air ejector from which compressed air is ejected is uniformly distributed in a diffusion chamber connected to the outlet of the air ejector, and uniformly supplied from the diffusion chamber into the fluidized bed. The high-temperature fine powder moves in fluid motion together with the flowing coarse particles, exchanges heat with the coarse particles and the cooling pipe, and is effectively cooled. The cooled high-temperature fine powder is carried out from the fluidized bed into a container by fluidizing air discharged to the outside. On the other hand, coarse particles are not entrained by the fluidizing air and remain within the fluidized bed.
また、流動層を形成する粗粒子は、微粉体の飛散に対し
て抵抗として働くので微粉体が流動層内に滞留する時間
を長くすることができ、微粉体の冷却が促進される。Furthermore, the coarse particles forming the fluidized bed act as resistance to the scattering of the fine powder, so that the time the fine powder stays in the fluidized bed can be extended, and the cooling of the fine powder is promoted.
また、原に、冷却管の表面は、流動する微粉体によって
常に研磨されており、その汚れを少（することができる
。Additionally, the surface of the cooling tube is constantly polished by flowing fine powder, which can reduce contamination.
本発明の一実施例を、第１図及び第２図によって説明す
る。２０は竪型の筒状の冷却装置の胴であり、その下部
には下方から流動用空気１０が供給される流動用空気整
流器１が形成され、同流動用空気整流器ｌの上端に多孔
板８が設けられている。An embodiment of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 20 denotes a vertical cylindrical body of the cooling device, and a fluidizing air rectifier 1 to which fluidizing air 10 is supplied from below is formed in the lower part of the body, and a perforated plate 8 is provided at the upper end of the fluidizing air rectifier 1. is provided.
胴２０内の多孔板８の上方の部分には、流動用空気１０
によって飛散しない程度の粒径と比重量を有する粗粒子
６が収容され、この粗粒子６と後記する流動用空気で流
動層２が形成されるようになっており、またこの部分に
は複数の冷却管７が配置されている。胴２０は流動層２
の部分より上方へ延びてその上端に排出ダクト１３が設
けられている。３は微粉体供給用空気１１を噴出し、そ
の負圧で容器１４内の高温微粉体４を側管１５より吸引
する空気エゼクタであり、同エゼクタ３の出口側に連設
されその内部にガイド板９′をもつ拡散室９は、第２図
に示すように次第にその断面を拡大して多孔板８の直上
の部分で胴２０に接続されている。In the upper part of the perforated plate 8 in the shell 20, a flow air 10 is provided.
Coarse particles 6 having a particle size and specific weight that do not scatter are accommodated, and a fluidized bed 2 is formed with the coarse particles 6 and the fluidizing air to be described later. A cooling pipe 7 is arranged. The shell 20 is a fluidized bed 2
A discharge duct 13 is provided at the upper end of the discharge duct 13 extending upward from the portion. Reference numeral 3 denotes an air ejector that blows out air 11 for supplying fine powder and uses its negative pressure to suck high-temperature fine powder 4 in the container 14 through a side pipe 15. As shown in FIG. 2, the diffusion chamber 9 having a plate 9' is connected to the shell 20 at a portion directly above the perforated plate 8, with its cross section gradually enlarged.
本実施例において、空気エゼクタ３へ微粉体供給用空気
１１が供給されると、空気エゼクタ３は高温微粉体４を
吸引し、これを拡散室９を経て胴２０内へ供給する。In this embodiment, when the air 11 for supplying fine powder is supplied to the air ejector 3, the air ejector 3 sucks the high temperature fine powder 4 and supplies it into the shell 20 through the diffusion chamber 9.
胴２０内の粗粒子６は、流動用空気整流器ｌより多孔板
８を経由して均一な状態で供給される流動用空気ＩＯの
作用により流動層２を形成しており、この流動層２内へ
前記高温微粉体４が供給され流動運動を行なう、流動層
２においては、その中に設置された冷却管７により、高
温微粉体４及び粗粒子６は冷却される。冷却された粗粒
子６は、高温微粉体４と接触しさらにこれを冷却する。The coarse particles 6 in the shell 20 form a fluidized bed 2 by the action of the fluidizing air IO uniformly supplied from the fluidizing air rectifier l via the perforated plate 8. In the fluidized bed 2 into which the high-temperature fine powder 4 is supplied and undergoes fluidized motion, the high-temperature fine powder 4 and the coarse particles 6 are cooled by a cooling pipe 7 installed therein. The cooled coarse particles 6 contact the high-temperature fine powder 4 and further cool it.
粗粒子６は、流動層内に滞留して、高温微粉体４の抵抗
として働いて高温微粉体４を流動層２内に巻き込む作用
をし、これの層内滞留時間を長く保つことができる。こ
のようにして冷却されて流動層２を通過した冷却微粉体
５は、排気１２と共に、胴２０の上端より排出ダクト１
３を経て系外に排出される。The coarse particles 6 stay in the fluidized bed and act as a resistance to the high-temperature fine powder 4 to draw the high-temperature fine powder 4 into the fluidized bed 2, so that the residence time in the bed can be maintained for a long time. The cooled fine powder 5 that has been cooled in this way and has passed through the fluidized bed 2 is passed through the exhaust duct 1 from the upper end of the shell 20 together with the exhaust 12.
3 and is discharged from the system.
一方、粒径と比重の大きい粗粒子６は、流動用空気１０
に同伴されずに流動層２内へ止まる。On the other hand, coarse particles 6 having a large particle size and specific gravity are transported by the fluidizing air 10.
The liquid remains in the fluidized bed 2 without being entrained by the liquid.
以上のように、本実施例では粗粒子６と流動用空気１０
で形成され、かつ冷却管７が配置された流動層２へ供給
された高温微粉体４は、粗粒子６によって流動層２内に
長時間保持され、かつ流動層２内で冷却管７、粗粒子６
と熱交換を行なうことによって、効果的に冷却されてそ
の温度を下げて冷却微粉体５となる。この冷却微粉体５
は、流動空気ＩＯによって粗粒子６と分離されて、冷却
微粉体５のみが流動層２を出て胴２０外へ排出される。As described above, in this embodiment, the coarse particles 6 and the fluidizing air 10
The high-temperature fine powder 4 fed to the fluidized bed 2 formed of particle 6
By exchanging heat with the powder, the powder is effectively cooled and its temperature is lowered to become the cooled fine powder 5. This cooled fine powder 5
is separated from the coarse particles 6 by the fluidized air IO, and only the cooled fine powder 5 exits the fluidized bed 2 and is discharged to the outside of the shell 20.
また、高温微粉体４は、空気エゼクタ３より噴出される
微粉体供給用空気１１と共に、次第に拡大する拡散室９
を経て流動層２へ供給されるために、高温微粉体４を均
一な状態で流動層２へ供給することができ、高温微粉体
４と冷却管７、粗粒子６との間の伝熱効率を高めること
ができる。In addition, the high-temperature fine powder 4 is transported together with the fine powder supply air 11 ejected from the air ejector 3 into a diffusion chamber 9 that gradually expands.
Since the high-temperature fine powder 4 can be supplied to the fluidized bed 2 in a uniform state, the heat transfer efficiency between the high-temperature fine powder 4, the cooling pipe 7, and the coarse particles 6 can be improved. can be increased.
また更に、伝熱管７の表面は、流動状態にある微粉体４
によって常に研磨されており、その汚れを少くすること
ができる。Furthermore, the surface of the heat transfer tube 7 is covered with fine powder 4 in a fluidized state.
It is constantly polished to reduce the amount of dirt.
本発明では、粗粒子により成る流動層内で伝熱管と高温
微粉体との間で伝熱を行ない、これに加えて、流動状態
にある粗粒子と、高温微粉体間の伝熱も加わり、かつ粗
粒子により高温微粉体は流動層内に長時間滞留するため
に、高い効率で高温微粉体を冷却することができ、従っ
て装置の小型化が可能である。In the present invention, heat is transferred between the heat transfer tube and the high-temperature fine powder in a fluidized bed made of coarse particles, and in addition to this, heat is transferred between the coarse particles in a fluidized state and the high-temperature fine powder. In addition, since the high-temperature fine powder stays in the fluidized bed for a long time due to the coarse particles, the high-temperature fine powder can be cooled with high efficiency, and the apparatus can therefore be downsized.
また、微粉体の成分によっては、冷却管表面に固着生成
する場合があるが、冷却管の表面は常に微粉体で研磨さ
れているので、汚れを少くすることができる。Further, depending on the components of the fine powder, it may adhere to the surface of the cooling tube, but since the surface of the cooling tube is always polished with the fine powder, dirt can be reduced.
またｋに、高温微粉体は、空気エゼクタより拡散室を経
て流動層に均一に供給されるために、流動層内における
冷却管と粗粒子との伝熱効率を高めることができる。Moreover, since the high-temperature fine powder is uniformly supplied to the fluidized bed from the air ejector via the diffusion chamber, the heat transfer efficiency between the cooling pipe and the coarse particles in the fluidized bed can be improved.
第１図は本発明の一実施例の縦断面図、第２図は同第１
図のＡ−Ａ視図である。
１・・−流動用空気整流器、２−・流動層。
３−空気エゼクタ、 ４−高温微粉体。
５−冷却微粉体、 ６−粗粒子。
７・−冷却管、 ８−多孔板。
９−拡散室、 １０−流動用空気。
１１−微粉体供給用空気、 １２−排気。
２〇−冷却装置の胴。FIG. 1 is a vertical sectional view of one embodiment of the present invention, and FIG.
It is an AA view of a figure. 1--Fluidized air rectifier, 2--Fluidized bed. 3-Air ejector, 4-High temperature fine powder. 5-Cooled fine powder, 6-Coarse particles. 7.-Cooling pipe, 8-Perforated plate. 9-diffusion chamber; 10-fluidizing air; 11-Air for supplying fine powder, 12-Exhaust. 20 - Cooling device shell.
Claims (1)
空気が噴出され高温の微粉体を吸引する空気エゼクタと
同空気エゼクタの出口に連接され前記流動層に開口する
拡散室とを有する微粉体供給装置を具備したことを特徴
とする微粉体冷却装置。A fine powder comprising a cooling pipe installed in a fluidized bed made of coarse particles, an air ejector from which compressed air is blown out and sucks the high-temperature fine powder, and a diffusion chamber connected to an outlet of the air ejector and opening into the fluidized bed. A fine powder cooling device characterized by comprising a powder supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14612490A JP2659850B2 (en) | 1990-06-06 | 1990-06-06 | Fine powder cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14612490A JP2659850B2 (en) | 1990-06-06 | 1990-06-06 | Fine powder cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0440228A true JPH0440228A (en) | 1992-02-10 |
| JP2659850B2 JP2659850B2 (en) | 1997-09-30 |
Family
ID=15400693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14612490A Expired - Fee Related JP2659850B2 (en) | 1990-06-06 | 1990-06-06 | Fine powder cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2659850B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011236463A (en) * | 2010-05-10 | 2011-11-24 | Ngk Insulators Ltd | Cooling apparatus of powder fired in sagger |
-
1990
- 1990-06-06 JP JP14612490A patent/JP2659850B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011236463A (en) * | 2010-05-10 | 2011-11-24 | Ngk Insulators Ltd | Cooling apparatus of powder fired in sagger |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2659850B2 (en) | 1997-09-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |