JP2000119665A - Distribution valve for powder stream of high concentration and distributing apparatus for powder stream of high concentration - Google Patents

Distribution valve for powder stream of high concentration and distributing apparatus for powder stream of high concentration

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Publication number
JP2000119665A
JP2000119665A JP29510798A JP29510798A JP2000119665A JP 2000119665 A JP2000119665 A JP 2000119665A JP 29510798 A JP29510798 A JP 29510798A JP 29510798 A JP29510798 A JP 29510798A JP 2000119665 A JP2000119665 A JP 2000119665A
Authority
JP
Japan
Prior art keywords
powder
distribution valve
valve
distribution
concentration
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.)
Withdrawn
Application number
JP29510798A
Other languages
Japanese (ja)
Inventor
Yoshitaka Koga
義孝 古閑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP29510798A priority Critical patent/JP2000119665A/en
Publication of JP2000119665A publication Critical patent/JP2000119665A/en
Withdrawn legal-status Critical Current

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

Abstract

PROBLEM TO BE SOLVED: To provide a distribution valve suitably employed for dividing conveying lines for pulverized coal stream of high concentration for coal gasification under a high pressure into plural lines and an apparatus for powder stream of high concentration using the distribution valve. SOLUTION: There is provided a distribution valve for powder stream of high concentration for branching a powder stream to be injected into a gasification furnace into at least two at a point before injection of a conveying line which has either a movable distribution valve plug 3 and an actuator 5 to operate it or a chamber portion for stagnating the powder stream with a path not lining in a straight line from an introduction portion of the powder stream to the discharging portion after branching. There is also provided a distributing apparatus for powder stream of high concentration using the distribution valve.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、石炭ガス化高濃度
粉体用分配弁および高濃度粉体用分配装置に関し、さら
に詳しくは、高圧状態における石炭ガス化高濃度微粉炭
の搬送ラインを、複数に分配するのに好適に用いられる
分配弁、並びに、その分配弁を用いる高濃度粉体用装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution valve for coal gasified high-concentration powder and a distribution device for high-concentration powder. The present invention relates to a distribution valve suitably used for distributing a plurality of powders, and an apparatus for high-concentration powder using the distribution valve.

【０００２】[0002]

【従来の技術】図４に、石炭ガス化炉用微粉炭供給シス
テムの概略構成の一例を示す。図中、１３は石炭をガス
化するガス化炉であり、このガス化炉１３は、熱エネル
ギーを発生させる燃焼部１５と、その熱エネルギーによ
りガス化反応を行わせる反応部１４と、により構成され
ている。上記燃焼部１５および反応部１４には、その目
的に応じて、それぞれ１本または２本以上の燃焼部バー
ナー１６と、１本または２本以上の反応部バーナー１７
とが備えられている。図４のガス化炉１３では、この燃
焼部１５と反応部１４との間に仕切を設けた２室方式を
採用しているが、この仕切６がない１室方式の場合に
も、その目的に応じて、通常はバーナー部を２段以上に
して、１本または２本以上の燃焼部バーナー１６と、１
本または２本以上の反応部バーナー１７とが備えられ
る。このようなガス化炉１は、その使用目的に応じ、通
常、内圧約２０ｋｇ／ｃｍ 2以上で運転され、例えば石
炭ガス化複合発電用ガス化炉の場合２０ｋｇ〜３０ｋｇ
／ｃｍ2程度で運転される。従って、高圧の状態に微粉
炭（粉状）を加圧してガス化炉に供給する必要があり、
その微粉炭を加圧するシステムとしては、図４のガス化
炉に至るまでのシステムが挙げられる。2. Description of the Related Art FIG. 4 shows a pulverized coal supply system for a coal gasifier.
1 shows an example of a schematic configuration of a system. In the figure, 13 is coal gas
This gasification furnace 13 is a heat gasification furnace.
And the heat energy generated by the combustion section 15
And a reaction unit 14 for performing a gasification reaction.
ing. The combustion unit 15 and the reaction unit 14 have their eyes
One or more burner bars, respectively,
And one or more reaction section burners 17
And are provided. In the gasification furnace 13 shown in FIG.
A two-chamber system with a partition between the baking section 15 and the reaction section 14
In the case of a one-room system without this partition 6,
Also, depending on the purpose, usually the burner part is more than two steps
And one or more combustion section burners 16 and 1
And two or more reaction section burners 17
You. Such a gasifier 1 can be used in accordance with the purpose of use.
Normally, internal pressure about 20kg / cm TwoDriving over, for example, stone
20kg-30kg in the case of combined gasification furnace for coal gasification combined cycle
/ CmTwoDriven by a degree. Therefore, fine powder under high pressure
It is necessary to pressurize charcoal (powder) and supply it to the gasifier,
The gasification system shown in Fig. 4
The system leading to the furnace is mentioned.

【０００３】気体および微粉炭からなる粉体気流は、差
圧によって供給ホッパー１１からガス化炉１３へ搬送さ
れる。この際、装置の内圧は、例えばホッパーの内圧が
３３ｋｇ／ｃｍ2程度、ガス化炉の内圧が２６ｋｇ／ｃ
ｍ2程度である。一方の供給ホッパーの微粉炭のレベル
が低下して出口弁を閉めた場合には、他方の供給ホッパ
ーから粉体気流が搬送される。このように供給ホッパー
を２以上設けることにより、ガス化炉への連続的な供給
を可能にする微粉炭供給システムが用いられている。[0003] A powder gas stream composed of gas and pulverized coal is conveyed from a supply hopper 11 to a gasification furnace 13 by a differential pressure. At this time, the internal pressure of the apparatus is, for example, about 33 kg / cm 2 in the hopper and 26 kg / c 2 in the gasification furnace.
m 2 . When the level of pulverized coal in one supply hopper decreases and the outlet valve is closed, the powder air stream is conveyed from the other supply hopper. By providing two or more supply hoppers, a pulverized coal supply system that enables continuous supply to a gasifier is used.

【０００４】例えば、図４の供給システムでは、先ず、
微粉炭ビン１０から一方の供給ホッパー（例えば１１
ａ）に微粉炭を送った後、供給ホッパー入口弁を閉め、
この供給ホッパー１１ａに、窒素ガス供給管から窒素
（Ｎ2）を導入して、ホッパー内部を加圧する。ガス化
炉１３の運転圧と同じ以上の圧力まで加圧したら、その
一方のホッパー１１ａの内圧を保持する。この際、他方
の供給ホッパー１１ｂはガス化炉１３への供給によっ
て、微粉炭レベルが低下してきている。そこで、一定レ
ベルに低下したことを確認した後、供給ホッパー１１ｂ
から１１ａへの切り替えを行う。その後は、自動的に一
方の供給ホッパー１１ａのみから、粉体気流が流出す
る。供給ホッパー１１ａ内の圧力が下がったら、圧力調
節弁１６を開けて窒素ガスを供給し、供給ホッパー内の
圧力を調整する。このように供給ホッパー１１からのガ
ス化炉への供給を行う場合、加圧→流動化→出口弁開け
→粉体の流出→ホッパー内の圧調、の順で行われる。こ
のような手順により、供給ホッパー１１ａからのガス化
炉１３への供給が終わったら、新たに微粉炭を取り入れ
て加圧された供給ホッパー１１ｂへの切り替えを行う。For example, in the supply system shown in FIG.
One supply hopper (for example, 11
After sending pulverized coal to a), close the feed hopper inlet valve,
Nitrogen (N 2 ) is introduced into the supply hopper 11a from a nitrogen gas supply pipe to pressurize the inside of the hopper. When the pressure is increased to a pressure equal to or higher than the operating pressure of the gasification furnace 13, the internal pressure of one of the hoppers 11a is maintained. At this time, the pulverized coal level of the other supply hopper 11b has been reduced by the supply to the gasification furnace 13. Then, after confirming that it has dropped to a certain level, the supply hopper 11b
To 11a. Thereafter, the powder airflow automatically flows out from only one of the supply hoppers 11a. When the pressure in the supply hopper 11a decreases, the pressure control valve 16 is opened to supply nitrogen gas, and the pressure in the supply hopper is adjusted. When the supply from the supply hopper 11 to the gasification furnace is performed as described above, the order of pressurization → fluidization → opening of the outlet valve → outflow of powder → pressure regulation in the hopper is performed in this order. According to such a procedure, when the supply from the supply hopper 11a to the gasification furnace 13 is completed, the supply hopper 11b is switched to the supply hopper 11b that is newly pressurized by introducing pulverized coal.

【０００５】上記のようなシステムの場合には、供給ホ
ッパーを切り替えながら微粉炭の供給を行うが、それぞ
れの搬送管の出口は合流していて、合流後に全流量調整
弁１９、さらに、流量検出器２０が設けられている。流
量検出器２０を経た後、微粉炭の流体は２以上に分岐し
て、粉体気流投入位置毎、例えばガス化炉の反応部への
投入位置および燃焼部への投入位置毎の各搬送ラインに
分けられる。上記搬送ライン（Ａ又はＢ）は、さらに各
投入位置に設けられたバーナー数に対応して、分配器１
９等を用いて分岐される。ここでは、例えば反応部バー
ナーに接続する搬送管を４本、燃料部バーナーに接続す
る搬送管を４本とすることができる。In the case of the above system, pulverized coal is supplied while switching the supply hopper, but the outlets of the respective transport pipes join together. A vessel 20 is provided. After passing through the flow rate detector 20, the pulverized coal fluid is branched into two or more, and each transport line is provided at each of the powder gas flow input positions, for example, at the input position to the reaction unit and the input position to the combustion unit of the gasifier. Divided into The transfer line (A or B) further includes a distributor 1 corresponding to the number of burners provided at each charging position.
Branching using 9 or the like. Here, for example, four transport pipes connected to the reaction part burner and four transport pipes connected to the fuel part burner can be provided.

【０００６】各搬送管からそれぞれのバーナーに搬送さ
れた粉体気流は、ガス化炉１の粉体気流投入位置毎、す
なわち、ガス化炉の反応部への投入位置および燃焼部へ
の投入位置毎に、それぞれ反応部１４と燃焼部１５に投
入される。図４では、反応部バーナー１７および燃焼部
バーナー１６をガス化炉１３の両側に図示してあるが、
これはさらにバーナー数が多くてもよく、例えばガス化
炉１３の縦方向において同じ高さで円周状からそれぞれ
投入できる。ガス化炉１への投入口であるバーナー部と
しては、例えば反応部バーナー４が４本、燃焼部バーナ
ー５が４本の場合が挙げられる。[0006] The powder gas stream conveyed from each conveying pipe to each burner is supplied to the gasification furnace 1 at each of the powder gas stream charging positions, that is, the charging position to the reaction section and the charging position to the combustion section of the gasification furnace. Each time, it is charged into the reaction section 14 and the combustion section 15, respectively. In FIG. 4, the reaction section burner 17 and the combustion section burner 16 are shown on both sides of the gasification furnace 13.
This may have a larger number of burners. For example, the burners can be introduced from the circumference at the same height in the vertical direction of the gasification furnace 13. As a burner part which is an inlet to the gasification furnace 1, for example, a case in which four reaction part burners 4 and four combustion part burners 5 are provided.

【０００７】上記システムにおける微粉炭（粉体）の気
流搬送では、固気比（粉／気体の重量比）が約１０以上
の高濃度搬送が行われ、粉体が多くて気体は少ない。こ
のような高濃度状態の粉体気流においては、粉と気体が
混ざり合っており、なかなか沈降が起こりにくく、もわ
もわ状態の気流のまま、搬送させる。この高濃度搬送を
用いれば、低濃度搬送では困難であった流れの切り替え
や分割ができる。そして、高濃度搬送の微粉炭流量制御
の方法としては、流量調節弁を用いた絞り弁方式がある
が、例えば２分岐の際、分岐後に流量調節弁をそれぞれ
設けるとすると、流量調節弁上流側で分岐するが、この
時点で粉体は２つに分配され、その後の流量調節弁を調
節しても粉体流量の制御は困難であった。In the pneumatic coal (powder) transport in the above-described system, high-concentration transport with a solid-gas ratio (powder / gas weight ratio) of about 10 or more is performed, and the amount of powder is large and the amount of gas is small. In such a high-concentration powder airflow, the powder and the gas are mixed, and it is difficult for sedimentation to occur. The use of the high-density transport enables the flow to be switched or divided, which is difficult in the low-density transport. As a method of controlling the flow rate of pulverized coal for high-concentration transport, there is a throttle valve method using a flow control valve. For example, in the case of two branches, if a flow control valve is provided after each branch, the flow control valve upstream side At this point, the powder is distributed into two parts, and it is difficult to control the flow rate of the powder even if the subsequent flow control valve is adjusted.

【０００８】一方、ガス化炉１３に粉体気流を投入する
際には、通常、上部の反応部１４と下部の燃焼部１５と
ではガス化炉に必要な粉体流量が異なる。よって、ガス
化炉１３への投入位置を大きく２つに分け、下部の燃焼
部２に導入した分の粉体は８割程度の燃焼にとどめる。
例えば、ガス化炉１３の下部では、空気を燃料に対する
理論燃焼空気量の８割しか供給せず、２割分は不完全燃
焼させることにより、下部温度の過度の上昇を押さえる
とともに燃料の一部をガス化させるのである。ガス化炉
１３では、このような作用を行っていることから、上部
の反応部１４と下部の燃焼部１５とに分けられているの
が通常であり、それぞれの役割の違いから、各投入位置
毎に最適な微粉炭の供給量は異なるのである。On the other hand, when a powder gas stream is introduced into the gasification furnace 13, the powder flow required for the gasification furnace is usually different between the upper reaction section 14 and the lower combustion section 15. Therefore, the charging position into the gasification furnace 13 is roughly divided into two, and the amount of powder introduced into the lower combustion section 2 is reduced to about 80% of combustion.
For example, in the lower part of the gasifier 13, only 80% of the theoretical combustion air amount for the fuel is supplied, and 20% of the fuel is incompletely combusted to suppress an excessive rise in the lower part temperature and to reduce a part of the fuel. Is gasified. In the gasifier 13, since such an operation is performed, it is usual that the gasification furnace 13 is divided into an upper reaction part 14 and a lower combustion part 15, and each charging position is different from each other due to the difference in their roles. The optimum supply of pulverized coal differs for each case.

【０００９】そして通常、石炭性状によって各投入位置
への供給割合を変えているが、装置への負荷を考慮し
て、投入の割合を変化させることも有効である。この場
合、低負荷になる程、空気比を上げる方向に調整するこ
とがよい。また、ガス化炉全体の空気比を変化させるこ
とにより、一定の投入割合で運転することも行われる。
さらに、ガス化炉内の反応としては、十分に酸素が供給
されてしまうと、全部酸素と反応して二酸化炭素になっ
てしまうため、微粉炭を不完全燃焼させてＣＯガスを効
率的に生成させるには、各部での供給量が十分に分配制
御されていることが望ましい。以上のことから、ガス化
炉１３へ粉体気流を投入する場合には、投入位置毎に流
量を変化させる必要があり、特に、ガス化炉の上部であ
る反応部と下部である燃焼部とでは、流量を変えて分配
制御する必要がある。Usually, the supply ratio to each charging position is changed depending on the properties of the coal, but it is also effective to change the charging ratio in consideration of the load on the apparatus. In this case, it is preferable to adjust the air ratio so as to increase as the load becomes lower. Further, by changing the air ratio of the entire gasification furnace, the operation is performed at a constant charging rate.
Furthermore, as a reaction in the gasification furnace, if sufficient oxygen is supplied, all of it reacts with oxygen and becomes carbon dioxide, so the pulverized coal is incompletely burned to efficiently generate CO gas. In order to achieve this, it is desirable that the supply amount in each part is sufficiently controlled. From the above, when the powder gas stream is injected into the gasification furnace 13, it is necessary to change the flow rate for each injection position, and in particular, the reaction section which is the upper part of the gasification furnace and the combustion section which is the lower part Then, it is necessary to control the distribution by changing the flow rate.

【００１０】しかしながら、図４のシステムにおける粉
体気流の分岐においては、全流量調節弁１２と分岐後の
流調弁１との間で、単に配管上の２分岐を行ったので
は、実際の粉体の流れを制御ことが困難であるという問
題が生じていた。例えば、図４では、粉体気流が直流で
流れてくるので、分岐の仕方次第では、Ａ搬送ラインと
Ｂ搬送ラインに流れ込む粉体の割合が大きく偏ってしま
う。そして一旦、片方の搬送ラインに流れ込んだ場合に
は、後流側の流調弁１の開度を調節しても、気流の量は
減少しても、弁直前の粉体の濃度が上昇しており、結果
として流調弁１後の粉体流量が変わらない。すなわち、
単なる配管で２つに分けている場合には、後の流調弁１
で粉体の分配比を調整するのは困難である。[0010] However, in the branching of the powder airflow in the system of FIG. 4, if two branches on the pipe are simply performed between the total flow rate control valve 12 and the flow control valve 1 after the branching, the actual branching is performed. There has been a problem that it is difficult to control the flow of the powder. For example, in FIG. 4, since the powder airflow flows in a direct current, the proportion of the powder flowing into the A transport line and the B transport line is largely biased depending on the branching method. Once flowing into one of the transport lines, the concentration of the powder immediately before the valve increases, even if the opening of the downstream flow regulating valve 1 is adjusted or the amount of air flow decreases. As a result, the powder flow rate after the flow control valve 1 does not change. That is,
If the pipe is divided into two pipes, the flow control valve 1
Thus, it is difficult to adjust the distribution ratio of the powder.

【００１１】[0011]

【発明が解決しようとする課題】本発明者らは、上記問
題点に鑑み、高圧状態での微粉炭の高濃度搬送におい
て、粉体気流の分岐を分配制御できるとともに、分岐し
た後の流速低下等による搬送ラインでの沈降等の問題を
効果的に防止できるような分配弁を開発すべく、鋭意検
討を行った。その結果、本発明者らは、分岐する際に、
三角形状の可動式分配弁体を有する分配弁、あるいは、
粉体気流を一旦淀ませるチャンバー部を有する分配弁を
用いることによって、上記問題点が解決されることを見
い出した。本発明は、かかる見地より完成されたもので
ある。DISCLOSURE OF THE INVENTION In view of the above problems, the present inventors can control the distribution of the pulverized gas stream in the high-concentration pulverized coal transportation under high pressure and reduce the flow velocity after the branching. In order to develop a distribution valve that can effectively prevent problems such as sedimentation in the transport line due to the above-mentioned problems, the present inventors have conducted intensive studies. As a result, when we branch,
A distributor valve having a triangular movable distributor valve, or
It has been found that the above problem can be solved by using a distribution valve having a chamber section for temporarily stopping the powder airflow. The present invention has been completed from such a viewpoint.

【００１２】[0012]

【課題を解決するための手段】すなわち、本発明は、ガ
ス化炉へ投入する粉体気流を、投入前の搬送経路にて少
なくとも２以上に分岐させる分配弁であって、可動式の
分配弁体およびそれを操作するアクチュエータを有する
ことを特徴とする高濃度粉体用分配弁を提供するもので
ある。また、ガス化炉へ投入する粉体気流を、投入前の
搬送経路にて少なくとも２以上に分岐させる分配弁であ
って、粉体気流導入部から分岐後の排出部への経路が直
線上になく、粉体気流を淀ませるチャンバー部を有する
ことを特徴とする高濃度粉体用分配弁を提供するもので
ある。さらに、本発明は、上記高濃度粉体用分配弁を用
いる石炭ガス化炉への高濃度粉体用分配装置において、
該分配弁を流れる粉体気流が水平もしくは上昇気流とな
るように該分配弁を配置すること、又は、該分配弁に対
して粉体気流の上流側にて全流量調節弁を設けたこと、
を特徴とする高濃度粉体用分配装置を提供するものであ
る。That is, the present invention relates to a distribution valve for branching a powder gas flow to be supplied to a gasification furnace into at least two paths in a conveying path before the supply, and comprises a movable distribution valve. It is an object of the present invention to provide a high-concentration powder distribution valve having a body and an actuator for operating the body. Further, a distribution valve for branching the powder air flow to be supplied to the gasification furnace into at least two or more paths in the conveying path before the charging, and the path from the powder air flow introduction part to the discharge part after the branch is linear. In addition, the present invention provides a distribution valve for high-concentration powder characterized by having a chamber section for keeping a powder air flow stagnant. Further, the present invention provides a high-concentration powder distribution apparatus for coal gasifier using the high-concentration powder distribution valve,
Arranging the distribution valve so that the powder airflow flowing through the distribution valve is horizontal or ascending airflow, or providing a total flow control valve upstream of the powder airflow with respect to the distribution valve,
And a dispensing device for high concentration powder.

【００１３】本発明の分配弁を用いれば、高圧状態での
微粉炭の高濃度搬送において、粉体気流を分岐を分配制
御できるとともに、分岐した後の流速低下等による搬送
ラインでの沈降等の問題を効果的に防止できる。そし
て、石炭ガス化炉への微粉炭供給システムに用いた場合
には、粉体気流の高濃度搬送であっても、ガス化炉の粉
体気流投入位置毎に、粉体気流を分配制御してガス化炉
に投入することができる。すなわち、ガス化炉における
バーナーからの投入量の割合として、例えば、下部の燃
焼部バーナー１６で全体供給量の約２０〜５０％の範
囲、上部の反応部バーナー１７で約５０〜８０％の範囲
で自由に調整することが可能である。また、本発明の分
配装置を用いれば、より効果的にガス化炉へ投入する粉
体気流を分配制御して分岐させることが可能であり、シ
ステム全体としても安定した運転が可能である。以下、
本発明について、詳細に説明する。By using the distribution valve of the present invention, it is possible to control the distribution of the pulverized air in the high-concentration pulverized coal in a high-pressure state and to control the distribution of the pulverized coal. Problems can be effectively prevented. And, when used in a pulverized coal supply system to a coal gasifier, the powder airflow is distributed and controlled at each powder airflow input position of the gasifier, even when the powder airflow is transported at a high concentration. Into the gasifier. That is, for example, the ratio of the input amount from the burner in the gasification furnace is in the range of about 20 to 50% of the total supply amount in the lower combustion section burner 16 and in the range of about 50 to 80% in the upper reaction section burner 17. Can be adjusted freely. Further, by using the distribution device of the present invention, it is possible to control the distribution of the powder airflow to be supplied to the gasification furnace and to branch the powder airflow more effectively, thereby enabling stable operation of the entire system. Less than,
The present invention will be described in detail.

【００１４】[0014]

【発明の実施の形態】添付図面（図１〜３）を参照しな
がら、本発明の実施の形態を説明する。実施の形態（その１） 図１に、本発明の高濃度粉体用分配弁の実施の形態の一
例を示す。本実施の形態の分配弁は、ガス化炉へ投入す
る粉体気流を投入前の搬送経路にて少なくとも２以上に
分岐させる分配弁であって、可動式の分配弁体およびそ
れを操作するアクチュエータを有する。ここで、分配弁
による分岐の数については、２以上であれば特に限定さ
れるものではなく、ガス化炉の粉体気流投入位置に合わ
せて任意に定められるが、好ましくは２〜５程度の少数
の分岐が適する。以下、２つに分岐する分配弁について
説明する。Embodiments of the present invention will be described with reference to the accompanying drawings (FIGS. 1 to 3). Embodiment (No. 1) FIG. 1 shows an example of an embodiment of a distribution valve for high-concentration powder of the present invention. The distribution valve according to the present embodiment is a distribution valve that branches a powder gas stream to be supplied to a gasification furnace into at least two or more paths on a conveyance path before the supply, and includes a movable distribution valve body and an actuator that operates the movable distribution valve body. Having. Here, the number of branches by the distribution valve is not particularly limited as long as it is 2 or more, and is arbitrarily determined according to the powder gas flow charging position of the gasification furnace. A few branches are suitable. Hereinafter, the distribution valve that branches into two will be described.

【００１５】図１における分配弁は、粉体気流を２つに
分岐させて搬送する２分岐部位であり、（ａ）は平面図
であり、（ｂ）は断面図である。この分配弁には、粉体
気流が流通する中央部分に分配弁体３が設けられてい
る。分配弁体３は上部から観察すると三角形状であり、
この三角形状の任意の点を中心として、粉体気流の流れ
方向に対して左右に動かすことができる。この際、分配
弁体３の弁体頂部４が、分岐後の搬送管（Ａ又はＢ）の
どちらの側に向いているかによって、粉体気流の流れは
大きく変化し、粉体気流の分配比に影響を与える。すな
わち、２方向への分岐で粉体の分配量を調整できるよう
にするには、その頂点での角度を変化させることが極め
て有効である。このように本発明の分配弁は、分岐点で
ある弁体頂部４の位置が左右に振れることから、Ａ方向
またはＢ方向に流れる粉体量を分配制御することができ
る。分配弁体３は、これに回転加えることができるアク
チュエータ５に接続されており、頂部の角度・方向を変
化させるとともに一定の方向に固定できる。また、石炭
ガス化炉への高濃度粉体用分配装置として上記分配弁を
用いる場合、この分配弁を流れる粉体気流が、水平又は
上昇気流となるように分配弁を配置することが好まし
い。The distribution valve in FIG. 1 is a two-branch portion for branching and conveying a powder airflow into two, where (a) is a plan view and (b) is a cross-sectional view. The distribution valve is provided with a distribution valve body 3 at a central portion through which the powder air flows. The distribution valve element 3 has a triangular shape when viewed from above,
The powder can be moved left and right with respect to the direction of flow of the powder airflow around the arbitrary point of the triangle. At this time, the flow of the powder air flow greatly changes depending on which side of the branch pipe 4 (A or B) faces the valve body top 4 of the distribution valve body 3, and the distribution ratio of the powder air flow is changed. Affect. That is, in order to be able to adjust the distribution amount of the powder by branching in two directions, it is extremely effective to change the angle at the vertex. As described above, the distribution valve of the present invention can control the distribution of the amount of powder flowing in the A direction or the B direction since the position of the valve element top 4 which is the branch point swings right and left. The distribution valve body 3 is connected to an actuator 5 that can be rotated and added thereto, and can change the angle and direction of the top and fix the same in a fixed direction. When the distribution valve is used as a distribution device for high-concentration powder to a coal gasifier, it is preferable to arrange the distribution valve so that the powder airflow flowing through the distribution valve is horizontal or upward.

【００１６】上記した図１の分配弁を用いれば、粉体気
流の分岐点の頂部において緻密な方向制御が可能なの
で、粉体（微粉炭等）の流れを簡易且つ正確に分配制御
することができる。例えば、図４のような微粉炭供給シ
ステムの粉体気流分岐点２に用いることにより、高濃度
搬送の粉体気流であっても、ガス化炉１３に流れ込む粉
体量を、反応部１４と燃焼部１５とで分配制御して投入
することができる。つまり、上記微粉炭供給システムで
は、分岐の仕方次第では、Ａ搬送ラインとＢ搬送ライン
に流れ込む粉体の割合が大きく偏ってしまう。そして、
このような微粉炭供給システムでは、一旦、片方の搬送
ラインに流れ込んだ場合には、後流側の流調弁１の開度
を調節しても、気流の量は減少しても、弁直前の粉体の
濃度が上昇しており、結果として流調弁１後の粉体流量
が変わらず、その割合（分配比）は容易には変わらな
い。そこで、本発明の分配弁を用いれば、粉体気流の分
岐当初において、各ラインに流れ込む粉体量を調節でき
るので、ガス化炉の投入位置毎に粉体投入量を変化させ
たい場合には特に有効である。ここで、石炭ガス化炉へ
の微粉炭供給システムに、上記分配弁を有する分配装置
を用いる場合には、分配弁に対して粉体気流の上流側に
て全流量調節弁１２を設けることが好ましい。これによ
って、粉体気流の全流量を調節して、上記分配弁による
分配制御を確実にできる。If the distribution valve shown in FIG. 1 is used, precise direction control can be performed at the top of the branch point of the powder airflow, so that the flow of the powder (pulverized coal or the like) can be controlled simply and accurately. it can. For example, by using the pulverized coal supply system as shown in FIG. 4 at the pulverized air flow branching point 2, the amount of the powder flowing into the gasification furnace 13 can be controlled by the reaction unit 14 even when the pulverized air flow is of a high concentration conveyance. It can be injected by controlling the distribution with the combustion unit 15. That is, in the above pulverized coal supply system, the ratio of the powder flowing into the A transport line and the B transport line is largely biased depending on the branching method. And
In such a pulverized coal supply system, once flowing into one of the transport lines, even if the opening degree of the flow regulating valve 1 on the downstream side is adjusted, the amount of airflow is reduced, As a result, the powder flow rate after the flow control valve 1 does not change, and the ratio (distribution ratio) does not easily change. Therefore, if the distribution valve of the present invention is used, the amount of powder flowing into each line can be adjusted at the beginning of the branching of the powder airflow, so that it is necessary to change the powder input amount for each input position of the gasification furnace. Especially effective. Here, when using a distribution device having the distribution valve in the pulverized coal supply system to the coal gasifier, the total flow rate control valve 12 may be provided on the upstream side of the powder airflow with respect to the distribution valve. preferable. This makes it possible to adjust the total flow rate of the powder airflow and to ensure the distribution control by the distribution valve.

【００１７】実施の形態（その２） 図２および図３に、本発明の高濃度粉体用分配弁の実施
の形態の一例を示す。本実施の形態の分配弁は、ガス化
炉へ投入する粉体気流を、投入前の搬送経路にて少なく
とも２以上に分岐させる分配弁であって、粉体気流導入
部から分岐後の排出部への経路が直線上になく、粉体気
流を淀ませるチャンバーを有する。ここで、分配弁によ
る分岐の数については、２以上であれば特に限定される
ものではなく、ガス化炉の粉体気流投入位置に合わせて
任意に定められるが、好ましくは２〜５程度の少数の分
岐が適する。以下、２つに分岐する分配弁について説明
する。 Embodiment (Part 2) FIGS. 2 and 3 show an embodiment of a distribution valve for high-concentration powder of the present invention. The distribution valve according to the present embodiment is a distribution valve that branches a powder airflow to be supplied to a gasification furnace into at least two or more paths on a conveyance path before the supply, and a discharge unit that is branched from a powder airflow introduction unit. There is a chamber that keeps the powder airflow away from the straight path. Here, the number of branches by the distribution valve is not particularly limited as long as it is 2 or more, and is arbitrarily determined according to the powder gas flow charging position of the gasification furnace. A few branches are suitable. Hereinafter, the distribution valve that branches into two will be described.

【００１８】図２における分配弁は、粉体気流を２つに
分岐させて搬送する２分岐部位である。この分配弁のチ
ャンバー２は、粉体気流導入部の反対側に、導入部に至
る粉体気流の流れ方向に対して、ほぼ垂直な面が設けら
れている。この面の作用によって、粉体気流導入部から
チャンバー部２に導入された粉体気流は、分岐後の排出
部へとそのまま流れ込むことはなくなり、チャンバー２
によって一旦淀まされる。特に高濃度の粉体気流の場合
には、粉体と気流とが一体となっていて分離しにくいの
で、粉体と気体との均一混合状態の淀みを付けることが
容易である。淀みの付け方としては、例えば、下部から
上部へ粉体気流を流し、上記面を有する三角形状又は四
角形状の平坦なチャンバー２で淀ませることが好ましい
が、チャンバー部全体の形状は特に限定されるものでは
ない。The distribution valve in FIG. 2 is a two-branch portion for branching and conveying the powder airflow into two. The distribution valve chamber 2 has a surface substantially perpendicular to the flow direction of the powder airflow reaching the introduction portion on the opposite side of the powder airflow introduction portion. Due to the action of this surface, the powder airflow introduced from the powder airflow introduction section into the chamber section 2 does not flow into the discharge section after branching, and the chamber 2
Is once stagnant. In particular, in the case of a high-concentration powder airflow, since the powder and the airflow are integrated and difficult to separate, it is easy to form a stagnation in a state of uniform mixing of the powder and the gas. As a method of stagnation, for example, it is preferable to flow a powder airflow from the lower part to the upper part and stagnate in a triangular or square flat chamber 2 having the above-mentioned surface, but the shape of the entire chamber part is particularly limited. Not something.

【００１９】その後、チャンバー２内を撹拌するように
流れた粉体気流は、チャンバー２に流れ込む粉体気流の
圧力によって、チャンバー２の出口である排出部から流
出する。各排出部のそれぞれの出口近傍には、流調弁１
が設けられており、分岐後の搬送ラインの流出量を制御
している。すなわち、各流調弁１の開度（開口面積度）
を変化させて、差圧を付けてやれば各搬送ライン（Ａ又
はＢ）に粉体気流が流出し、分配比に沿った分岐が可能
となる。具体的には、一方の弁を絞って、他方の弁を開
放してやれば、均等ではない分配が可能である。但し、
一方の弁を絞り過ぎると、流速が低下してしまい、配管
で沈降してしまうことがあるので注意が必要である。こ
の流調弁１は、通常、絞り弁方式である。After that, the powder airflow that has flown so as to stir the inside of the chamber 2 flows out of the outlet, which is the outlet of the chamber 2, due to the pressure of the powder airflow that flows into the chamber 2. A flow regulating valve 1 is provided near each outlet of each discharge section.
Is provided to control the outflow amount of the transfer line after branching. That is, the opening degree (opening area degree) of each flow control valve 1.
Is changed and a differential pressure is applied, a powder air flow flows out to each transport line (A or B), and branching according to the distribution ratio becomes possible. Specifically, if one valve is throttled and the other valve is opened, uneven distribution is possible. However,
It is necessary to be careful that if one of the valves is excessively throttled, the flow velocity decreases and the sedimentation may occur in the piping. This flow regulating valve 1 is usually of a throttle valve type.

【００２０】このように本実施の形態における分配弁
は、チャンバー２で粉体気流を一旦淀ませることによ
り、粉体気流が直接、分岐後の搬送管に流れ込むことが
なく、淀みによって各流調弁入り口では粉体と気体とが
均一混合した状態であるため、各流調弁１の開度調節に
より、分岐後の各搬送ラインの粉体流量を調節でき、粉
体気流を分配制御することができる。また、石炭ガス化
炉への高濃度粉体用分配装置として上記分配弁を用いる
場合、この分配弁を流れる粉体気流が、水平又は上昇気
流となるように分配弁を配置することが好ましく、下降
流として設置するのは分配機能上、望ましくない。そし
て、チャンバー２部の形状は、一旦、気流を淀ませるよ
うな機能、および、本流が支流に直接流れ込まないよう
な機能を有すればよく、例えば、図２や図３のような態
様が有効である。図３の形態の場合には、斜線部に粉体
が滞留することもあるが、ＡラインおよびＢラインへの
粉体気流の分配が目的であるため、この態様でも実施可
能である。As described above, the distribution valve according to the present embodiment allows the powder airflow to flow once into the conveying pipe after branching by temporarily stagnation of the powder airflow in the chamber 2, and to control each flow by the stagnation. Since the powder and the gas are uniformly mixed at the valve entrance, the flow rate of the powder in each transfer line after branching can be adjusted by adjusting the opening of each flow control valve 1 to control the distribution of the powder gas flow. Can be. Further, when using the distribution valve as a high-concentration powder distribution device to the coal gasifier, it is preferable to arrange the distribution valve so that the powder airflow flowing through the distribution valve is horizontal or ascending airflow, Installation as a downflow is not desirable in terms of distribution function. The shape of the chamber 2 only needs to have a function of temporarily blocking the air flow and a function of preventing the main stream from directly flowing into the tributary. For example, the embodiments shown in FIGS. 2 and 3 are effective. It is. In the case of the embodiment shown in FIG. 3, the powder may stay in the hatched portion, but since the purpose is to distribute the powder airflow to the A line and the B line, the embodiment can be implemented in this embodiment.

【００２１】[0021]

【発明の効果】本発明の分配弁および装置は、高圧状態
における石炭ガス化高濃度微粉炭の搬送ラインを、複数
に分配するのに好適に用いられる。すなわち、本発明に
よれば、高圧（１５〜４０ｋｇ／cｍ２）状態での微粉
炭の高濃度搬送において、粉体気流を分岐による分配比
を任意に制御できるとともに、分岐した後の流速低下等
による搬送ラインでの沈降等の問題を効果的に防止でき
る。そして、ガス化炉への微粉炭供給システムに用いる
ことにより、ガス化炉への投入位置毎に、微粉炭投入量
を変化させて分配供給することができる。また、本発明
の装置を用いれば、微粉炭供給システムにおいて、配管
の詰まりが発生しにくくなり、システム全体としても安
定した運転が可能である。The distribution valve and the apparatus of the present invention are suitably used for distributing a plurality of high-concentration coal gasification pulverized coal conveying lines in a high-pressure state. That is, according to the present invention, in the high-concentration transport of pulverized coal under high pressure (15 to 40 kg / cm2), the distribution ratio of the powder airflow by branching can be arbitrarily controlled, and the flow rate decreases after branching. Problems such as settling on the transfer line can be effectively prevented. Then, by using the system for supplying pulverized coal to the gasification furnace, the pulverized coal input amount can be changed and distributed for each charging position to the gasification furnace. Further, with the use of the apparatus of the present invention, in the pulverized coal supply system, clogging of the piping hardly occurs, and stable operation of the entire system is possible.

【図面の簡単な説明】[Brief description of the drawings]

【図１】図１は、本発明の実施の形態（その１）の分配
弁に関し、（ａ）は平面図であり、（ｂ）は断面図であ
る。FIG. 1 is a plan view of a distribution valve according to an embodiment (part 1) of the present invention, and FIG. 1 (b) is a cross-sectional view.

【図２】図２は、本発明の実施の形態（その２）の分配
弁を表す概略構成図である。FIG. 2 is a schematic configuration diagram illustrating a distribution valve according to an embodiment (second) of the present invention.

【図３】図３は、本発明の実施の形態（その２）の他の
分配弁を表す概略構成図である。FIG. 3 is a schematic configuration diagram illustrating another distribution valve according to the embodiment (No. 2) of the present invention.

【図４】図４は、石炭ガス化炉用微粉炭供給システムの
一例を示す配置図である。FIG. 4 is a layout diagram showing an example of a pulverized coal supply system for a coal gasifier.

【符号の説明】[Explanation of symbols]

１ 流量調節弁（流調弁） ２ チャンバー ３ 分配弁体 ４ 弁体頂部 ５ アクチュエータ １０ 微粉炭ビン １１ 供給ホッパー １２ 全流量調節弁 １３ ガス化炉 １４ 反応部 １５ 燃焼部 １６ 燃焼部バーナー １７ 反応部バーナー １８ 追加搬送気体ライン １９ 分配器 ２０ 流量計 DESCRIPTION OF SYMBOLS 1 Flow control valve (flow control valve) 2 Chamber 3 Distributing valve body 4 Valve body top 5 Actuator 10 Pulverized coal bin 11 Supply hopper 12 Full flow control valve 13 Gasifier 14 Reaction unit 15 Burning unit 16 Burning unit burner 17 Reaction unit Burner 18 Additional carrier gas line 19 Distributor 20 Flow meter

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 ガス化炉へ投入する粉体気流を、投入前
の搬送経路にて少なくとも２以上に分岐させる分配弁で
あって、可動式の分配弁体およびそれを操作するアクチ
ュエータを有することを特徴とする高濃度粉体用分配
弁。1. A distribution valve for branching a powder gas flow to be supplied to a gasification furnace into at least two or more paths on a conveyance path before the supply, and having a movable distribution valve element and an actuator for operating the distribution valve element. Dispensing valve for high concentration powder characterized by the following. 【請求項２】 ガス化炉へ投入する粉体気流を、投入前
の搬送経路にて少なくとも２以上に分岐させる分配弁で
あって、粉体気流導入部から分岐後の排出部への経路が
直線上になく、粉体気流を淀ませるチャンバー部を有す
ることを特徴とする高濃度粉体用分配弁。2. A distribution valve for branching a powder gas flow to be supplied to a gasification furnace into at least two or more paths on a conveyance path before the supply, wherein a path from a powder gas flow introduction section to a discharge section after branching is provided. Distributing valve for high-concentration powder, characterized by having a chamber part that is not on a straight line but keeps the powder air flow. 【請求項３】 請求項１又は２記載の高濃度粉体用分配
弁を用いる石炭ガス化炉への高濃度粉体用分配装置にお
いて、該分配弁を流れる粉体気流が、水平又は上昇気流
となるように該分配弁を配置することを特徴とする高濃
度粉体用分配装置。3. An apparatus for distributing high-concentration powder to a coal gasifier using the distribution valve for high-concentration powder according to claim 1 or 2, wherein the flow of powder flowing through the distribution valve is horizontal or upward. A dispensing device for high-concentration powder, wherein the distributing valve is arranged such that 【請求項４】 請求項１又は２記載の高濃度粉体用分配
弁を用いる石炭ガス化炉への高濃度粉体用分配装置にお
いて、該分配弁に対して粉体気流の上流側にて全流量調
節弁を設けたことを特徴とする高濃度粉体用分配装置。4. An apparatus for distributing high-concentration powder to a coal gasifier using the distribution valve for high-concentration powder according to claim 1 or 2, wherein the distribution valve is disposed upstream of the powder airflow with respect to the distribution valve. A distribution device for high-concentration powder characterized by having a total flow control valve.
JP29510798A 1998-10-16 1998-10-16 Distribution valve for powder stream of high concentration and distributing apparatus for powder stream of high concentration Withdrawn JP2000119665A (en)

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Application Number Priority Date Filing Date Title
JP29510798A JP2000119665A (en) 1998-10-16 1998-10-16 Distribution valve for powder stream of high concentration and distributing apparatus for powder stream of high concentration

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JP2000119665A true JP2000119665A (en) 2000-04-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009031212A1 (en) * 2007-09-05 2009-03-12 Oshikiri Machinery Ltd. Kneaded dough dividing apparatus
KR20150037412A (en) * 2013-09-30 2015-04-08 한국전력공사 Multi-stage Gasification Apparatus
CN108240488A (en) * 2016-12-26 2018-07-03 天津市科瑞燃气设备有限公司 A kind of intelligent gas distribution device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009031212A1 (en) * 2007-09-05 2009-03-12 Oshikiri Machinery Ltd. Kneaded dough dividing apparatus
US8387521B2 (en) 2007-09-05 2013-03-05 Oshikiri Machinery Ltd. Kneaded dough dividing apparatus
JP5258301B2 (en) * 2007-09-05 2013-08-07 株式会社オシキリ Kneaded dough dispensing device
KR20150037412A (en) * 2013-09-30 2015-04-08 한국전력공사 Multi-stage Gasification Apparatus
KR102165243B1 (en) * 2013-09-30 2020-10-13 한국전력공사 Multi-stage Gasification Apparatus
CN108240488A (en) * 2016-12-26 2018-07-03 天津市科瑞燃气设备有限公司 A kind of intelligent gas distribution device

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