JPH08681B2 - Reformer - Google Patents
ReformerInfo
- Publication number
- JPH08681B2 JPH08681B2 JP7310789A JP7310789A JPH08681B2 JP H08681 B2 JPH08681 B2 JP H08681B2 JP 7310789 A JP7310789 A JP 7310789A JP 7310789 A JP7310789 A JP 7310789A JP H08681 B2 JPH08681 B2 JP H08681B2
- Authority
- JP
- Japan
- Prior art keywords
- ejector
- flow rate
- steam
- pressure
- raw material
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen
- C01B3/02—Production of hydrogen; Production of gaseous mixtures containing hydrogen
- C01B3/32—Production of hydrogen; Production of gaseous mixtures containing hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide or air
- C01B3/34—Production of hydrogen; Production of gaseous mixtures containing hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide or air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen; Production of gaseous mixtures containing hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide or air by reaction of hydrocarbons with gasifying agents using catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Hydrogen, Water And Hydrids (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は例えば炭化水素を原料として水素リッチガ
スに改質する改質装置に関するものである。TECHNICAL FIELD The present invention relates to a reformer for reforming a hydrocarbon-rich material into a hydrogen-rich gas, for example.
［従来の技術］ 第２図は例えば“ON−SITE FUEL CELL POWERPLANT TE
CHNOLOGY AND DEVELOPMENT PROGRAM"FINAL REPORT,GRI
REPORT FCR−7715（1986年10月,Gas Research Institut
e発行）に示された従来の改質装置を示す系統図であ
り、図において、（１）例えば炭化水素を主成分とする
原料の流量を検出して発信する原料流量発信器、（２）
は原料流量調節弁、（３）は原料・スチーム予熱器、
（４）は脱硫器、（５）はスチームにより駆動され、原
料を吸引・昇圧するエジェクタで、そのエジェクタ
（５）内に流入するスチーム流量を調整するニードル
（図示せず）を動作させるアクチュエータ（5a）を有し
ている。（６）はスチーム流量発信器、（７）は改質器
である。[Prior Art] FIG. 2 shows, for example, "ON-SITE FUEL CELL POWERPLANT TE".
CHNOLOGY AND DEVELOPMENT PROGRAM "FINAL REPORT, GRI
REPORT FCR-7715 (October 1986, Gas Research Institut
FIG. 2 is a system diagram showing a conventional reforming device shown in (e issuance), in which (1) a raw material flow rate transmitter for detecting and transmitting a flow rate of a raw material containing hydrocarbon as a main component, (2)
Is a raw material flow rate control valve, (3) is a raw material / steam preheater,
(4) is a desulfurizer, (5) is an ejector that is driven by steam and sucks / pressurizes the raw material, and an actuator (a not shown) that operates a needle (not shown) that adjusts the flow rate of steam flowing into the ejector (5). 5a). (6) is a steam flow transmitter, and (7) is a reformer.
次に動作について説明する。第２図において、原料流
量発信器（１）の信号により、原料流量調節弁（２）を
動作させて流量調整を行い、その流量調整された原料
は、原料・スチーム予熱器（３）において改質器（７）
からの改質ガスにより昇温される。昇温後の原料はその
原料中に含まれる有機硫黄分を除去するために脱硫器
（４）へ送られる。スチーム流量発信器（６）の信号に
よって、エジェクタ（５）のスチーム入口側のアクチュ
エータ（5a）により動作するニードル（図示せず）で流
量調節されたスチームを駆動源としてエジェクタ（５）
が駆動し、原料を吸引・昇圧する。吸引・昇圧された原
料はスチームと混合した後、改質器（７）へ送られ、燃
焼ガスの加熱により、水素リッチな改質ガスへと改質さ
れる。Next, the operation will be described. In FIG. 2, the raw material flow rate control valve (2) is operated by the signal of the raw material flow rate transmitter (1) to adjust the flow rate, and the flow rate adjusted raw material is modified in the raw material / steam preheater (3). Pawn (7)
The temperature is raised by the reformed gas from. The heated raw material is sent to a desulfurizer (4) in order to remove the organic sulfur content contained in the raw material. The ejector (5) uses the steam whose flow rate is adjusted by a needle (not shown) operated by the actuator (5a) on the steam inlet side of the ejector (5) as a drive source in response to a signal from the steam flow transmitter (6).
Drives to suck and pressurize the raw material. After the sucked and pressurized raw material is mixed with steam, it is sent to the reformer (7), where it is reformed into a hydrogen-rich reformed gas by heating the combustion gas.
［発明が解決しようとする課題］ 従来の装置は以上のように構成されているので、エジ
ェクタ（５）の原料入口と原料流量調節弁（２）の間
が、ほぼエジェクタ（５）の吸引側圧力と同じとなるた
め、運転条件により、かなり大きな負圧となることがあ
る。運転条件により、エジェクタ（５）の吸引側圧力が
どのように変化するのかを説明する。スチームと原料の
流量比が一定のとき、一般にエジェクタ（５）の特性と
して、第３図（ａ）の直線が示すようにエジェクタ
（５）の吐出側圧力とエジェクタ（５）の吸引側圧力と
の差は、吐出流量（原料流量）にほぼ比例する。（原燃
料流量とスチーム流量の比が一定のとき）また、エジェ
クタ（５）の吐出側圧力は、下流の配管や機器の圧力損
失によって決まる。例えば、下流の圧力損失が流量の２
乗に比例するとすれば、エジェクタ（５）の吐出側圧力
は第３図（ａ）の点線で示した放物線のようになる。エ
ジェクタ（５）の吸引側圧力はこの両者の差であり、第
３図（ａ）と第３図（ｂ）の矢印がそれに当る。第３図
（ｂ）にエジェクタ（５）の吸引側圧力とエジェクタ
（５）の吐出流量の関係を示す。このようにエジェクタ
（５）はエジェクタ（５）の使用可能範囲の中間付近で
大きな負の吸引側圧力を生じる。脱硫器（４）や予熱器
（３）は、この吸引側圧力とほぼ同じとなるため、容器
を吸引側圧力に耐えるように設計しなければならない。
又、吐出側流量によりエジェクタ（５）の吸引側圧力が
大きく変化するため、原料流量調節弁（２）の必要CV値
範囲が広く、流量制御が困難であった。又吸着脱硫剤を
用いた場合には、負圧による吸着性能の低下などの問題
点があり、信頼性の低いものとなっていた。[Problems to be Solved by the Invention] Since the conventional device is configured as described above, the space between the raw material inlet of the ejector (5) and the raw material flow rate control valve (2) is substantially on the suction side of the ejector (5). Since the pressure is the same as the pressure, a considerably large negative pressure may be generated depending on the operating conditions. How the suction side pressure of the ejector (5) changes depending on the operating conditions will be described. When the flow rate ratio of the steam and the raw material is constant, generally, the characteristics of the ejector (5) are the discharge side pressure of the ejector (5) and the suction side pressure of the ejector (5) as shown by the straight line in FIG. Is almost proportional to the discharge flow rate (raw material flow rate). (When the ratio of the raw fuel flow rate and the steam flow rate is constant) Further, the discharge side pressure of the ejector (5) is determined by the pressure loss of the downstream pipe and equipment. For example, if the downstream pressure loss is 2
If it is proportional to the power, the discharge side pressure of the ejector (5) becomes like a parabola shown by the dotted line in FIG. 3 (a). The pressure on the suction side of the ejector (5) is the difference between the two, and the arrows in FIGS. 3 (a) and 3 (b) correspond to it. FIG. 3B shows the relationship between the suction side pressure of the ejector (5) and the discharge flow rate of the ejector (5). Thus, the ejector (5) produces a large negative pressure on the suction side near the middle of the usable range of the ejector (5). Since the desulfurizer (4) and the preheater (3) have almost the same pressure as the suction side pressure, the container must be designed to withstand the suction side pressure.
Further, since the suction side pressure of the ejector (5) greatly changes depending on the discharge side flow rate, the necessary CV value range of the raw material flow rate control valve (2) is wide, and it is difficult to control the flow rate. Further, when an adsorptive desulfurizing agent is used, there are problems such as a decrease in the adsorptive performance due to a negative pressure, and the reliability is low.
この発明は、上記のような課題を解決するためになさ
れたもので、エジェクタ吸引側圧力の負圧の程度を低減
できる改質装置を得ることを目的とする。The present invention has been made to solve the above-described problem, and has as its object to provide a reformer capable of reducing the degree of negative pressure of the ejector suction side pressure.
［課題を解決するための手段］ この発明に係わる改質装置は、エジェクタのスチーム
入口近傍と原料入口近傍とに連通され、スチームの一部
を原料入口近傍側へバイパスさせるバイパス配管を設け
たものである。[Means for Solving the Problems] A reforming apparatus according to the present invention is provided with a bypass pipe that is connected to the vicinity of a steam inlet and a vicinity of a raw material inlet of an ejector and bypasses a part of steam to a side near the raw material inlet. Is.
［作用］ この発明における改質装置は、エジェクタのスチーム
入口近傍よりバイパス配管を通してスチームの一部をエ
ジェクタの原料入口近傍側にバイパスさせ、原料と一緒
に吸引させるため、駆動源のスチーム流量が減少し、吸
引流量が増加するため、エジェクタの吸引能力が低下
し、エジェクタの吸引側の大きな負圧は解消される。[Operation] In the reformer of the present invention, a portion of steam is bypassed from the vicinity of the steam inlet of the ejector to the vicinity of the raw material inlet of the ejector through the bypass pipe and sucked together with the raw material, so that the steam flow rate of the drive source is reduced. However, since the suction flow rate increases, the suction capacity of the ejector decreases, and the large negative pressure on the suction side of the ejector is eliminated.
［発明の実施例］ 以下、この発明の一実施例を図について説明する。[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.
第１図において、（１）〜（７）は上述した従来装置
の構成と同様である。（８）はエジェクタ（５）のスチ
ーム入口近傍と原料入口近傍とに連通され、スチームの
一部を原料入口近傍側へバイパスさせるバイパス配管、
（９）及び（10）はこのバイパス配管（８）に配設させ
た源圧弁及び流量制限オリフイスである。In FIG. 1, (1) to (7) have the same configuration as the conventional device described above. Reference numeral (8) is a bypass pipe which is connected to the vicinity of the steam inlet and the vicinity of the raw material inlet of the ejector (5) and bypasses a part of the steam toward the raw material inlet.
(9) and (10) are a source pressure valve and a flow rate limiting orifice arranged in the bypass pipe (8).
次に動作について説明する。エジェクタ（５）が使用
可能範囲の中間付近において、エジェクタ（５）の吸引
側圧力が大きな負圧となることは既に記した。この発明
の一実施例では、エジェクタ（５）の吸引側圧力が大き
な負圧となった際、減圧弁（９）の二次側圧力とエジェ
クタ（５）の吸引側圧力との差が駆動力となり、流量制
限オリフイス（10）を通ってスチームの一部がバイパス
配管（８）を通してエジェクタ（５）の吸引側へ、即
ち、原料入口側へバイパスされる。減圧弁（９）の二次
側圧力は、大気圧近傍に調整する。原料流量とスチーム
流量はこれらより上流側にある原料流量発信器（１）と
スチーム流量発信器（６）の信号によって流量調整して
いるので、全体の流量は変わらない。スチームの一部が
バイパスすることにより、駆動側流量の減少と吸引側流
量の増大を生じ、エジェクタ（５）の吸引能力の低下に
より、エジェクタ（５）の吸引側圧力の大きな負圧が解
消される。逆に、エジェクタ（５）の吸引側圧力の負圧
の程度が小さいときは、減圧弁（９）の二次側圧力との
差が小さいため、バイパスされるスチーム流量は、ごく
小さくエジェクタ（５）の吸引能力の低下はない。Next, the operation will be described. It has already been described that the suction side pressure of the ejector (5) becomes a large negative pressure near the middle of the usable range of the ejector (5). In one embodiment of the present invention, when the suction side pressure of the ejector (5) becomes a large negative pressure, the difference between the secondary side pressure of the pressure reducing valve (9) and the suction side pressure of the ejector (5) is the driving force. Then, a part of the steam is bypassed to the suction side of the ejector (5) through the bypass pipe (8), that is, to the raw material inlet side through the flow rate restriction orifice (10). The pressure on the secondary side of the pressure reducing valve (9) is adjusted to near atmospheric pressure. The raw material flow rate and the steam flow rate are adjusted by the signals of the raw material flow rate transmitter (1) and the steam flow rate transmitter (6) located upstream of these, so that the total flow rate does not change. By bypassing part of the steam, the flow rate on the drive side is decreased and the flow rate on the suction side is increased, and the suction capacity of the ejector (5) is reduced, so that a large negative pressure on the suction side of the ejector (5) is eliminated. It On the contrary, when the negative pressure of the suction side pressure of the ejector (5) is small, the difference between the pressure on the secondary side of the pressure reducing valve (9) is small, and thus the bypassed steam flow rate is very small. There is no decrease in the suction capacity of).
以上のように、エジェクタ（５）の吸引圧力の負圧の
程度を低減できるので、エジェクタ（５）の吸引側へ大
気が混入したり、吸着脱硫触媒の性能低下などがなくな
る。また、エジェクタ（５）の吸引側圧力が吐出流量に
よって大きく変化することなく常に大気圧付近に保たれ
るので、原燃料の流量調節が容易となる。又、容器につ
いても耐圧性が緩和される。As described above, since the degree of the negative pressure of the suction pressure of the ejector (5) can be reduced, atmospheric air is not mixed into the suction side of the ejector (5) and the performance of the adsorption desulfurization catalyst is not deteriorated. Further, since the suction side pressure of the ejector (5) is always maintained near the atmospheric pressure without being largely changed by the discharge flow rate, the flow rate of the raw fuel can be easily adjusted. Further, the pressure resistance of the container is also eased.
尚、上記実施例ではバイパス配管（８）に減圧弁
（９）、流量制限オリフイス（10）の両方を設けた場合
について述べたが、何れか一方のみでもよく、必ずしも
設けなくても所期の目的は達成できる。In the above embodiment, the case where both the pressure reducing valve (9) and the flow rate limiting orifice (10) are provided in the bypass pipe (8) has been described, but only one of them may be provided, and it is not necessarily provided. The purpose can be achieved.
［発明の効果］ この発明は以上説明した通り、エジェクタのスチーム
入口近傍とエジェクタの原燃料入口近傍とに連通され、
スチームの一部を原燃料入口近傍にバイパスさせるバイ
パス配管を設けたことにより、エジェクタの吸引側圧力
の負圧の程度を低減でき、信頼性の高い改質装置を得る
ことができる。[Effects of the Invention] As described above, the present invention communicates with the vicinity of the steam inlet of the ejector and the vicinity of the raw fuel inlet of the ejector,
By providing the bypass pipe for bypassing a part of the steam in the vicinity of the raw fuel inlet, the degree of negative pressure on the suction side pressure of the ejector can be reduced and a highly reliable reformer can be obtained.
第１図はこの発明の一実施例による改質装置を示す系統
図、第２図は従来の改質装置を示す系統図、第３図
（ａ），（ｂ）はエジェクタの特性を示す特性図であ
る。 図において、（５）はエジェクタ、（７）は改質器、
（８）はバイパス配管である。 尚、図中同一符号は同一又は相当部分を示す。FIG. 1 is a system diagram showing a reformer according to an embodiment of the present invention, FIG. 2 is a system diagram showing a conventional reformer, and FIGS. 3 (a) and 3 (b) are characteristics showing ejector characteristics. It is a figure. In the figure, (5) is an ejector, (7) is a reformer,
(8) is a bypass pipe. The same reference numerals in the drawings indicate the same or corresponding parts.
Claims (1)
改質器と、スチームを駆動源とし上記原燃料を吸引して
上記改質器に送出するエジェクタとを有する改質装置に
おいて、上記エジェクタのスチーム入口近傍と上記エジ
ェクタの原燃料入口近傍とに連通され、スチームの一部
を上記原燃料入口近傍へバイパスさせるバイパス配管を
備えたことを特徴とする改質装置。1. A reformer having a reformer for reforming raw fuel to generate hydrogen fuel gas, and an ejector using steam as a driving source to suck the raw fuel and send it to the reformer. A reformer comprising: a bypass pipe, which is connected to a vicinity of a steam inlet of the ejector and a vicinity of a raw fuel inlet of the ejector and bypasses a part of the steam to a vicinity of the raw fuel inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7310789A JPH08681B2 (en) | 1989-03-23 | 1989-03-23 | Reformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7310789A JPH08681B2 (en) | 1989-03-23 | 1989-03-23 | Reformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02252604A JPH02252604A (en) | 1990-10-11 |
| JPH08681B2 true JPH08681B2 (en) | 1996-01-10 |
Family
ID=13508740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7310789A Expired - Lifetime JPH08681B2 (en) | 1989-03-23 | 1989-03-23 | Reformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08681B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4139338B2 (en) | 2004-02-12 | 2008-08-27 | 本田技研工業株式会社 | Fuel gas production equipment |
-
1989
- 1989-03-23 JP JP7310789A patent/JPH08681B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02252604A (en) | 1990-10-11 |
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