JP3046895B2 - Rock hopper - Google Patents
Rock hopperInfo
- Publication number
- JP3046895B2 JP3046895B2 JP5143580A JP14358093A JP3046895B2 JP 3046895 B2 JP3046895 B2 JP 3046895B2 JP 5143580 A JP5143580 A JP 5143580A JP 14358093 A JP14358093 A JP 14358093A JP 3046895 B2 JP3046895 B2 JP 3046895B2
- Authority
- JP
- Japan
- Prior art keywords
- hopper
- gas
- powder
- lower hopper
- pipe
- 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 - Lifetime
Links
Landscapes
- Air Transport Of Granular Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加圧流動床ボイラ、石
炭ガス化炉等における燃料の供給などに適用されるロッ
クホッパに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock hopper applied to a fuel supply in a pressurized fluidized-bed boiler, a coal gasifier and the like.
【０００２】[0002]
【従来の技術】図２は加圧流動床ボイラ、石炭ガス化炉
などにおいて燃料の供給に使用されている従来のロック
ホッパシステムの説明図である。図において、下部ホッ
パ２内の粉体状の石炭は計量フィーダ３により定量づつ
切り出され、搬送ガスにより消費先の炉内へ送られるよ
うになっている。下部ホッパ２内は燃料レベルが低下す
ると均圧管４を介して搬送ガスの一部が下部ホッパ２内
上部空間へ供給され、常に内圧が一定に保たれている。
この他、下部ホッパ２内の上部へはシールガスが供給さ
れている。このシールガスが常温のため、下部ホッパ２
内の上部空間における気体の温度は常温に近くなってい
る。2. Description of the Related Art FIG. 2 is an explanatory view of a conventional lock hopper system used for supplying fuel in a pressurized fluidized-bed boiler, a coal gasifier and the like. In the figure, powdery coal in a lower hopper 2 is cut out by a metering feeder 3 by a fixed amount, and sent to a consumption furnace by a carrier gas. When the fuel level in the lower hopper 2 decreases, a part of the carrier gas is supplied to the upper space in the lower hopper 2 through the equalizing pipe 4 so that the internal pressure is always kept constant.
In addition, a seal gas is supplied to an upper part in the lower hopper 2. Since this sealing gas is at room temperature, the lower hopper 2
The temperature of the gas in the upper space inside is close to normal temperature.
【０００３】[0003]
【発明が解決しようとする課題】上記のような従来のロ
ックホッパシステムにおいては、下部ホッパ２内の燃料
レベルが低下すると均圧弁５を開として上部ホッパ１内
を下部ホッパ２の内圧と同じにし、払出し弁６を開とす
ることにより上部ホッパ１内の粉体状の石炭を下部ホッ
パ２内に払い出すが、このとき上部ホッパ１内の粉体状
の約５０℃の石炭と下部ホッパ２内の約２０℃の気体と
の間で熱交換が行われ、気体の温度が約２０℃から約５
０℃まで昇温して気体の熱膨張が発生する。この熱膨張
した気体は下部ホッパ２内圧を上昇させて均圧管４と計
量フィーダ３との隙間を微粉状の石炭とともに流れる。
このため、計量フィーダ３の切出し量以上の燃料が下部
ホッパ２から消費先の炉内へ供給される不具合がある。In the conventional lock hopper system as described above, when the fuel level in the lower hopper 2 drops, the equalizing valve 5 is opened to make the inside of the upper hopper 1 equal to the internal pressure of the lower hopper 2. When the discharge valve 6 is opened, the powdery coal in the upper hopper 1 is discharged into the lower hopper 2. At this time, the powdery coal in the upper hopper 1 at about 50 ° C. and the lower hopper 2 are discharged. A heat exchange is performed between the gas at about 20 ° C. and the temperature of the gas at about 20 ° C.
When the temperature is raised to 0 ° C., thermal expansion of the gas occurs. The thermally expanded gas raises the internal pressure of the lower hopper 2 and flows through the gap between the pressure equalizing tube 4 and the metering feeder 3 together with the finely powdered coal.
For this reason, there is a problem that the fuel more than the cut-out amount of the measuring feeder 3 is supplied from the lower hopper 2 into the furnace of the consumption destination.
【０００４】[0004]
【課題を解決するための手段】本発明に係るロックホッ
パは上記課題の解決を目的にしており、シールガス管を
介してシールガスが供給される下部ホッパ内へ上部ホッ
パ内から粉体を払出し計量フィーダにより上記下部ホッ
パ内の粉体を切り出して搬送ガスにより供給するロック
ホッパにおいて、上記シールガス管に装着されシールガ
スを上記上部ホッパ内の粉体と略同じ温度まで加温する
ヒータを備えた構成を特徴とする。SUMMARY OF THE INVENTION A lock hopper according to the present invention aims to solve the above-mentioned problems, and discharges powder from an upper hopper into a lower hopper to which a seal gas is supplied via a seal gas pipe. A lock hopper that cuts out the powder in the lower hopper with a measuring feeder and supplies the powder with a carrier gas, the heater being mounted on the seal gas pipe and heating the seal gas to substantially the same temperature as the powder in the upper hopper; It is characterized by the following configuration.
【０００５】また、本発明に係るロックホッパは、シー
ルガス管を介してシールガスが供給される下部ホッパ内
へ上部ホッパ内から粉体を払出し計量フィーダにより上
記下部ホッパ内の粉体を切り出して搬送ガスにより供給
するロックホッパにおいて、上記シールガスとして上記
上部ホッパ内の粉体と略同じ温度の上記搬送ガスまたは
上記上部ホッパ内加圧用の加圧ガスを使用する構成を特
徴とする。The lock hopper according to the present invention discharges powder from the upper hopper into a lower hopper to which a seal gas is supplied through a seal gas pipe, and cuts out the powder in the lower hopper by a measuring feeder. The lock hopper supplied by the carrier gas is characterized in that the carrier gas having the same temperature as the powder in the upper hopper or the pressurized gas for pressurizing the upper hopper is used as the seal gas.
【０００６】[0006]
【作用】即ち、本発明に係るロックホッパにおいては、
シールガス管を介してシールガスが供給される下部ホッ
パ内へ上部ホッパ内から粉体を払出し計量フィーダによ
り下部ホッパ内の粉体を切り出して搬送ガスにより供給
するロックホッパにおけるシールガス管にヒータが装着
されシールガスを上部ホッパ内の粉体と略同じ温度まで
加温するようになっており、下部ホッパ内の気体の温度
と上部ホッパ内の粉体の温度とが略同じであることによ
り上部ホッパ内から下部ホッパ内へ粉体を払出したとき
に下部ホッパ内の気体が熱膨張しない。That is, in the lock hopper according to the present invention,
A heater is supplied to the seal gas pipe in the lock hopper, which discharges the powder from the upper hopper into the lower hopper to which the seal gas is supplied via the seal gas pipe, cuts out the powder in the lower hopper with the measuring feeder, and supplies the powder with the carrier gas. The seal gas is mounted and heated to a temperature approximately the same as the powder in the upper hopper, and the temperature of the gas in the lower hopper and the temperature of the powder in the upper hopper are substantially the same, so that the upper gas is heated. When powder is discharged from the hopper into the lower hopper, the gas in the lower hopper does not thermally expand.
【０００７】また、本発明に係るロックホッパにおいて
は、シールガス管を介してシールガスが供給される下部
ホッパ内へ上部ホッパ内から粉体を払出し計量フィーダ
により下部ホッパ内の粉体を切り出して搬送ガスにより
供給するロックホッパにおけるシールガスとして上部ホ
ッパ内の粉体と略同じ温度の搬送ガスまたは上部ホッパ
内加圧用の加圧ガスが使用されるようになっており、下
部ホッパ内の気体の温度と上部ホッパ内の粉体の温度と
が略同じであることにより上部ホッパ内から下部ホッパ
内へ粉体を払出したときに下部ホッパ内の気体が熱膨張
しない。Further, in the lock hopper according to the present invention, the powder is discharged from the upper hopper into the lower hopper to which the seal gas is supplied via the seal gas pipe, and the powder in the lower hopper is cut out by the measuring feeder. As a seal gas in the lock hopper supplied by the carrier gas, a carrier gas having substantially the same temperature as the powder in the upper hopper or a pressurized gas for pressurizing the upper hopper is used. Since the temperature is substantially the same as the temperature of the powder in the upper hopper, the gas in the lower hopper does not thermally expand when the powder is discharged from the upper hopper to the lower hopper.
【０００８】[0008]
【実施例】図１は本発明の一実施例に係るロックホッパ
システムの説明図である。図において、本実施例に係る
ロックホッパシステムは加圧流動床ボイラ、石炭ガス化
炉などにおいて燃料の供給に使用されるもので、下部ホ
ッパ２内の粉体状の石炭は計量フィーダ３により定量づ
つ切り出され、搬送ガスにより消費先の炉内へ送られる
ようになっている。下部ホッパ２内は燃料レベルが低下
しても均圧管４を介して搬送ガスの一部が下部ホッパ２
内の上部空間へ供給され、常に内圧が一定に保たれてい
る。この他、下部ホッパ２内の上部へはシールガスが供
給されている。FIG. 1 is an explanatory view of a lock hopper system according to one embodiment of the present invention. In the figure, a lock hopper system according to the present embodiment is used for supplying fuel in a pressurized fluidized-bed boiler, a coal gasifier, etc., and powdery coal in a lower hopper 2 is measured by a measuring feeder 3. They are cut out one by one and sent to the furnace where they are consumed by the carrier gas. Even if the fuel level in the lower hopper 2 decreases, a part of the carrier gas passes through the equalizing pipe 4
It is supplied to the upper space inside, and the internal pressure is always kept constant. In addition, a seal gas is supplied to an upper part in the lower hopper 2.
【０００９】即ち、図に示すように上部ホッパ１内には
図示しないホッパ等のタンクから供給管１１を介して粉
体状に微粉砕された石炭１５が供給され貯蔵されてい
る。この上部ホッパ１には閉止弁を備えた加圧管１２が
接続されており、加圧ガスが供給されるように構成され
ている。その下方には下部ホッパ２が払出弁６を備えた
払出管１４を介して接続され備えられており、これらの
上部、下部ホッパ１、２間には均圧弁５を備えた均圧管
１３が接続されている。また、下部ホッパ２の下部には
計量フィーダ３が設けられ、エジェクタ９により粉体状
の石炭１６が搬送管１０を介して搬送ガスとともに消費
先の炉内へ搬送されるようになっている。下部ホッパ２
には搬送管１０に接続された均圧管４が取付けられ、さ
らにヒータ７を具えたシールガス管８が接続されて加温
されたシールガスを供給するようになっている。That is, as shown in the figure, finely pulverized coal 15 is supplied and stored in a tank such as a hopper (not shown) through a supply pipe 11 in the upper hopper 1. The upper hopper 1 is connected to a pressurizing pipe 12 having a closing valve, and is configured to supply a pressurized gas. Below the lower hopper 2 is connected and provided via a discharge pipe 14 provided with a discharge valve 6, and an equalizing pipe 13 provided with a pressure equalizing valve 5 is connected between the upper and lower hoppers 1 and 2. Have been. A metering feeder 3 is provided below the lower hopper 2, and the ejector 9 transports the powdered coal 16 together with the transport gas into the furnace of the consumer via the transport pipe 10. Lower hopper 2
Is connected to a pressure equalizing pipe 4 connected to a transport pipe 10, and further connected to a sealing gas pipe 8 having a heater 7 so as to supply a heated sealing gas.
【００１０】上部ホッパ１内へは供給管１１の閉止弁を
解放することにより図示しないタンクから供給管１１を
介して粉体状の石炭１５が約５０°Ｃの温度を保って供
給され貯蔵される。このとき、粉体状の石炭１５はタン
ク内部の気体とともに供給されるが、上部ホッパ１内を
一定の圧力に保つために加圧管１２からも加圧ガスが導
き入れられる。下部ホッパ２内の粉体状の石炭１６は、
計量フィーダ３により定量づつ切り出されてエジェクタ
９により搬送管１０内を流れ、搬送ガスにより消費先の
炉内へ送られる。粉体状の石炭１６のレベルが低下する
と搬送管１０に接続されている均圧管４を介して搬送ガ
スが下記ホッパ２内の上部空間へ供給され、搬送管１０
内と同じ内圧が保たれる。また、下部ホッパ２内の粉体
状の石炭１６のレベルが低下すると均圧弁５を開けて上
部ホッパ１内の気体を均圧管１３を介して下部ホッパ２
内へ送り内圧を同じにした後、払出弁６を開けて払出管
１４を介して下部ホッパ２内へ約５０℃に保たれた粉体
状の石炭１５を払い出す。このとき、下部ホッパ２内に
はヒータ７によって約５０℃に加温されたシールガスが
シールガス管８を介して継続的に投入されているので内
部の気体及び石炭１６も約５０℃となっており、下部ホ
ッパ２内の気体の膨張が避けられる。なお、このように
石炭１５の約５０℃の温度と略同じ温度に加温したシー
ルガスを下部ホッパ２内に投入するためにこのシールガ
スを加温する代わりに、一点鎖線で示すように周囲に存
在する搬送ガス、又は加圧管１２の加圧ガスなどをシー
ルガスとして使用するようにしてもよい。下部ホッパ２
内の気体は粉体状の石炭１５、１６と略同じ温度である
ので、下部ホッパ２内の気体の熱膨張を避けることがで
きる。By opening the closing valve of the supply pipe 11 into the upper hopper 1, powdered coal 15 is supplied from a tank (not shown) via the supply pipe 11 while being kept at a temperature of about 50 ° C. and stored. You. At this time, the powdered coal 15 is supplied together with the gas inside the tank, but a pressurized gas is also introduced from the pressurized pipe 12 to keep the inside of the upper hopper 1 at a constant pressure. The powdered coal 16 in the lower hopper 2
It is cut out by the metering feeder 3 by a fixed amount, flows through the transport pipe 10 by the ejector 9, and is sent by the transport gas into the furnace at the consumption destination. When the level of the powdered coal 16 decreases, the carrier gas is supplied to the upper space in the hopper 2 via the equalizing pipe 4 connected to the carrier pipe 10, and the carrier pipe 10
The same internal pressure as inside is maintained. When the level of the powdered coal 16 in the lower hopper 2 decreases, the pressure equalizing valve 5 is opened, and the gas in the upper hopper 1 is supplied to the lower hopper 2 via the equalizing pipe 13.
After the internal pressure is made the same, the discharge valve 6 is opened, and the powdered coal 15 kept at about 50 ° C. is discharged through the discharge pipe 14 into the lower hopper 2. At this time, since the sealing gas heated to about 50 ° C. by the heater 7 is continuously supplied into the lower hopper 2 through the sealing gas pipe 8, the internal gas and the coal 16 also reach about 50 ° C. The expansion of the gas in the lower hopper 2 is avoided. In addition, instead of heating the sealing gas heated to approximately the same temperature as the temperature of about 50 ° C. of the coal 15 into the lower hopper 2, instead of heating the sealing gas, as shown by a dashed line, May be used as the seal gas. Lower hopper 2
Since the temperature of the gas inside is substantially the same as the temperature of the powdered coals 15 and 16, thermal expansion of the gas in the lower hopper 2 can be avoided.
【００１１】従来のロックホッパシステムにおいては上
部ホッパ内の石炭を下部ホッパ内に払出すとき、上部ホ
ッパ内の約５０℃の石炭と下部ホッパ内の約２０℃の気
体との間で熱交換が行われ、気体の温度が約２０℃から
約５０℃まで昇温して気体の熱膨張が発生する。この熱
膨張した気体は下部ホッパの内圧を上昇させて均圧管と
計量フィーダとの隙間を微粉状の石炭とともに流れる。
このため、計量フィーダ３の切出し量以上の燃料が下部
ホッパから消費先の炉内へ供給される不具合があるが、
本ロックホッパシステムにおいては下部ホッパ２内に供
給されるシールガスにヒータ７を設置したり、或いは搬
送ガス、加圧ガスなどを使用したりしてシールガスを粉
体状の石炭１５，１６の温度と同じ温度まで昇温するこ
とにより下部ホッパ２内の気体の温度と上部ホッパ１内
の粉体状の石炭１５の温度とが同じであるので、下部ホ
ッパ２内へ石炭１５を受入れる際に下部ホッパ２内の気
体の昇温による熱膨張が発生せず、消費先の炉内への燃
料の供給量が変動しなくなる。In the conventional lock hopper system, when coal in the upper hopper is discharged into the lower hopper, heat exchange occurs between coal at approximately 50 ° C. in the upper hopper and gas at approximately 20 ° C. in the lower hopper. The temperature of the gas is increased from about 20 ° C. to about 50 ° C., and thermal expansion of the gas occurs. This thermally expanded gas raises the internal pressure of the lower hopper and flows through the gap between the pressure equalizing tube and the metering feeder together with the fine coal.
For this reason, there is a problem that the fuel more than the cut-out amount of the measuring feeder 3 is supplied from the lower hopper into the furnace of the consumption destination.
In the present lock hopper system, a heater 7 is installed in the seal gas supplied into the lower hopper 2, or a carrier gas, a pressurized gas, or the like is used to convert the seal gas into powdery coal 15 or 16. By raising the temperature to the same temperature as the temperature of the gas in the lower hopper 2 and the temperature of the powdered coal 15 in the upper hopper 1, when the coal 15 is received into the lower hopper 2, No thermal expansion occurs due to the temperature rise of the gas in the lower hopper 2, and the supply amount of fuel to the furnace at the consumption destination does not fluctuate.
【００１２】[0012]
【発明の効果】本発明に係るロックホッパは前記のよう
に構成されており、上部ホッパ内から下部ホッパ内へ粉
体を払出したときに下部ホッパ内の気体が熱膨張しない
ので、計量フィーダの切り出し量以上の粉体が消費先へ
供給される不具合がなくなる。The lock hopper according to the present invention is constructed as described above, and when the powder is discharged from the upper hopper into the lower hopper, the gas in the lower hopper does not thermally expand. The problem that powder more than the cut-out amount is supplied to the consumer is eliminated.
【図１】図１は本発明の一実施例に係るロックホッパシ
ステムのフロー系統図である。FIG. 1 is a flow system diagram of a lock hopper system according to one embodiment of the present invention.
【図２】図２は従来のロックホッパシステムのフロー系
統図である。FIG. 2 is a flow system diagram of a conventional lock hopper system.
１ 上部ホッパ ２ 下部ホッパ ３ 計量フィーダ ４ 均圧管 ５ 均圧弁 ６ 払出弁 ７ ヒータ ８ シールガス管 ９ エジェクタ １０ 搬送管 １１ 供給管 １２ 加圧管 １３ 加圧管 １４ 払出管 １５ 石炭 １６ 石炭 DESCRIPTION OF SYMBOLS 1 Upper hopper 2 Lower hopper 3 Measuring feeder 4 Equalizing pipe 5 Equalizing valve 6 Discharge valve 7 Heater 8 Seal gas pipe 9 Ejector 10 Conveying pipe 11 Supply pipe 12 Pressurizing pipe 13 Pressurizing pipe 14 Discharging pipe 15 Coal 16 Coal
Claims (2)
される下部ホッパ内へ上部ホッパ内から粉体を払い出し
計量フィーダにより上記下部ホッパ内の粉体を切り出し
て搬送ガスにより供給するロックホッパにおいて、上記
シールガス管に装着されシールガスを上記上部ホッパ内
の粉体と略同じ温度まで加温するヒータを備えたことを
特徴とするロックホッパ。1. A lock hopper which discharges powder from an upper hopper into a lower hopper to which a seal gas is supplied via a seal gas pipe, cuts out the powder in the lower hopper with a measuring feeder, and supplies the powder with a carrier gas. A lock hopper provided with a heater mounted on the seal gas pipe to heat the seal gas to a temperature substantially equal to that of the powder in the upper hopper.
される下部ホッパ内へ上部ホッパ内から粉体を払出し計
量フィーダにより上記下部ホッパ内の粉体を切り出して
搬送ガスにより供給するロックホッパにおいて、上記シ
ールガスとして上記上部ホッパ内の粉体と略同じ温度の
上記搬送ガスまたは上記上部ホッパ内加圧用の加圧ガス
を使用することを特徴とするロックホッパ。2. A lock hopper which discharges powder from the upper hopper into a lower hopper to which a seal gas is supplied via a seal gas pipe, cuts out the powder in the lower hopper with a measuring feeder, and supplies the powder with a carrier gas. A lock hopper, wherein the carrier gas or the pressurized gas for pressurizing the upper hopper is used at substantially the same temperature as the powder in the upper hopper as the seal gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5143580A JP3046895B2 (en) | 1993-06-15 | 1993-06-15 | Rock hopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5143580A JP3046895B2 (en) | 1993-06-15 | 1993-06-15 | Rock hopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH074637A JPH074637A (en) | 1995-01-10 |
| JP3046895B2 true JP3046895B2 (en) | 2000-05-29 |
Family
ID=15342047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5143580A Expired - Lifetime JP3046895B2 (en) | 1993-06-15 | 1993-06-15 | Rock hopper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3046895B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5160292B2 (en) * | 2008-04-21 | 2013-03-13 | バブコック日立株式会社 | Pressurized powder supply apparatus and operation method thereof |
| JP5362422B2 (en) * | 2009-04-21 | 2013-12-11 | 電源開発株式会社 | LOCK HOPPER DEVICE, COAL GASIFICATION COMPACT POWER GENERATION SYSTEM AND OPERATION METHOD |
-
1993
- 1993-06-15 JP JP5143580A patent/JP3046895B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH074637A (en) | 1995-01-10 |
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