JP2725143B2 - Combustion superheater - Google Patents

Combustion superheater

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Publication number
JP2725143B2
JP2725143B2 JP6056962A JP5696294A JP2725143B2 JP 2725143 B2 JP2725143 B2 JP 2725143B2 JP 6056962 A JP6056962 A JP 6056962A JP 5696294 A JP5696294 A JP 5696294A JP 2725143 B2 JP2725143 B2 JP 2725143B2
Authority
JP
Japan
Prior art keywords
steam
amount
superheater
water
temperature
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
Application number
JP6056962A
Other languages
Japanese (ja)
Other versions
JPH07260105A (en
Inventor
信幸 西口
正彦 渡辺
智 黒石
弘明 二階堂
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP6056962A priority Critical patent/JP2725143B2/en
Publication of JPH07260105A publication Critical patent/JPH07260105A/en
Application granted granted Critical
Publication of JP2725143B2 publication Critical patent/JP2725143B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

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

【0001】[0001]

【産業上の利用分野】本発明は、過熱対象の蒸気が流れ
る蒸気流路を備え、蒸気流路に流路内を流れる蒸気を過
熱する過熱部と流路内を流れる蒸気に水噴霧して蒸気量
を富化可能な水噴霧部とを備えるとともに、過熱部おい
て蒸気に供給する熱量を制御する過熱量制御手段備え
た燃焼式過熱器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a steam flow passage through which a steam to be overheated flows, and superheats a steam flowing through the flow passage in the steam flow passage and sprays water onto the steam flowing through the flow passage. The present invention relates to a combustion type superheater including a water spray unit capable of enriching the amount of steam and an overheat amount control unit that controls the amount of heat supplied to the steam in the superheating unit.

【0002】[0002]

【従来の技術】このような燃焼式過熱器は、例えば焼却
炉に設置されたボイラで生成される低温の蒸気を過熱器
により高温化し、蒸気タービンで発電するごみ発電技術
等の分野で利用される。このような過熱器を備えたごみ
発電においては、発電に高温高圧蒸気が使用できるため
高効率発電が可能である。さらに、例えば水噴霧部を
えてあれば、焼却炉からの蒸気量が減少したときに、
噴霧部から過熱器の蒸気管内に水噴霧し、蒸気を追加生
成することで蒸気変動を抑えて小規模のごみ発電炉でも
安定した蒸気量を確保することができる。
2. Description of the Related Art Such a combustion type superheater is used, for example, in the field of refuse power generation technology in which low-temperature steam generated by a boiler installed in an incinerator is heated by a superheater to generate power by a steam turbine. You. In waste power generation having such a superheater, high-efficiency power generation is possible because high-temperature and high-pressure steam can be used for power generation. Furthermore, for example, Bei water spray section
If Ete, when the amount steam from the incinerator is reduced, water
Water is sprayed from the spray section into the steam pipe of the superheater to generate additional steam
By doing so , steam fluctuation can be suppressed, and a stable amount of steam can be secured even in a small-scale waste power generation furnace.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな構造を採用すると所定の蒸気量を確保できるもの
の、たとえ補給水量を蒸気化するのに必要な熱量を過熱
部に追加供給する構成を採用する場合においても蒸気温
度の変動が起こる場合があった。ここで、上記のよう
に、ごみ発電等の発電装置においては、システムを安定
的に運転するためには、発電装置に供給される蒸気量が
安定していると同時にその蒸気温度が安定している必要
がある。従って、本発明の目的は、過熱器から生成され
る蒸気の蒸気量が経時的に安定して確保されるととも
に、その蒸気温度の変動も低く抑えられ、例えば、ごみ
発電システムに好適に使用することが可能な燃焼式過熱
器を得ることにある。
[SUMMARY OF THE INVENTION However, although possible to secure a predetermined amount of steam By adopting such a structure, even if the replenishing amount of water to adopt additional supply configuration superheating section the amount of heat required to vaporize In some cases, the steam temperature sometimes fluctuated. Here, as described above, in a power generator such as a refuse power generator, in order to operate the system stably, the amount of steam supplied to the power generator is stable, and at the same time, the steam temperature is stable. Need to be. Therefore, an object of the present invention is to stably secure the amount of steam generated from a superheater over time, and to suppress the fluctuation of the steam temperature low. For example, the present invention is suitably used for a garbage power generation system. To obtain a combustion type superheater.

【0004】[0004]

【課題を解決するための手段】この目的を達成するため
本発明による燃焼式過熱器の特徴構成は、過熱器入口に
おける蒸気流量を検出する蒸気流量検出手段と、過熱器
出口における蒸気温度を検出する蒸気温度検出手段
備えるとともに、前記蒸気流量検出手段で検出した蒸気
流量が所定の目標値よりも低くなると、水噴霧部に所要
量の水を噴霧する水噴霧量制御手段を設け前記噴霧す
る水量に対して必要とする追加熱量の算出結果に基づ
き、前記蒸気温度所定の目標値になるように過熱量制
御手段により前記供給する熱量を設定し、さらに、前記
蒸気温度検出手段の検出結果に基づいて前記蒸気温度を
前記目標値に維持するように、前記過熱量制御手段によ
り前記供給する熱量をPID制御することにあるそし
て、それらの作用・効果は以下の通りである。
In order to achieve this object, a combustion type superheater according to the present invention is characterized in that a superheater inlet is provided.
A steam flow rate detecting means for detecting a definitive steam flow, the steam temperature detecting means for detecting the steam temperature in the superheater outlet
And the steam detected by the steam flow rate detecting means.
If the flow rate is lower than the specified target value,
The water spray amount controlling means for spraying an amount of water provided to the spray
Based on the calculation result of the additional heat required for the amount of water
Can, superheat system so that the steam temperature becomes a predetermined target value
The amount of heat to be supplied is set by control means.
The steam temperature is determined based on the detection result of the steam temperature detecting means.
In order to maintain the target value, the superheat amount control means
In other words, the amount of heat to be supplied is controlled by PID . And the operation and effect are as follows.

【0005】[0005]

【作用】本願の燃焼式過熱器では、過熱器出口における
蒸気流量を所定の目標値に維持しながら、前記過熱器出
口における蒸気温度を所定の目標値に安定して維持でき
る。つまり、蒸気流量検出手段の検出結果が前記所定の
目標値に達しない場合には、水噴霧部より不足量に見合
う量の水を噴霧する水噴霧量制御手段を備えており、所
要量の水の補給がおこなわれるから、例えばごみ発電の
ように、蒸気量変動があっても、所定の蒸気量を確保で
きるようになり、その結果として前記過熱器出口におけ
る蒸気温度の低下傾向に対して、これを所定の目標値に
維持するのに必要とする追加熱量を過熱量制御手段で算
出して供給熱量を制御するから、前記蒸気温度の低下は
防止でき、さらに、蒸気温度検出手段による過熱器出口
における蒸気温度検出結果に基づいて、前記過熱量制
御手段が蒸気温度を所定の目標値になるように供給する
熱量をPID制御するから、前記目標値以上に過渡的に
前記蒸気温度が上昇することを抑制できる。
In the combustion type superheater of the present invention, at the superheater outlet
While maintaining the steam flow rate at a predetermined target value, the
The steam temperature at the mouth can be stably maintained at the specified target value.
You. That is, the detection result of the steam flow rate detecting means is the predetermined value.
If the target value is not reached, the water sprayer
Water spray amount control means for spraying
The required amount of water is replenished.
Even if there is a fluctuation in the amount of steam,
At the outlet of the superheater.
To a predetermined target value for the steam temperature
The amount of additional heat required to maintain
To control the amount of heat supplied, the decrease in the steam temperature is
Prevention can, further on the basis of the detection result of the steam temperature at the superheater outlet by steam temperature detecting means, since the superheat control means PID controls the amount of heat supplied so that the steam temperature to a predetermined target value, wherein Transient beyond the target value
An increase in the steam temperature can be suppressed.

【0006】従って、蒸気量の不足に伴って蒸気流路に
水噴霧を行い、かつ、過熱部温度な異常な上昇を抑制す
るために水噴霧を行いながら、蒸気量の確保とともに蒸
気温度を目標値に維持することができる。ここで、例え
ばごみ発電のように、蒸気量変動のある廃熱ボイラから
の蒸気を利用して発電をおこなうシステムにおいても、
蒸気流路に流入する蒸気量が所定の蒸気量に対して不足
する場合でも、水噴霧量制御手段により所要量の水の補
給がおこなわれ、所定の蒸気温度を維持しながら所定の
蒸気量を確保してシステムの運転ができる
[0006] Accordingly, the steam flow path has been
Sprays water and suppresses abnormal rise in superheated section temperature
While spraying water to ensure
The air temperature can be maintained at the target value. Here, for example
From waste heat boilers with steam fluctuations, such as in garbage power generation
In systems that generate electricity using steam,
The amount of steam flowing into the steam channel is insufficient for the specified amount of steam
The required amount of water by the water spray amount control means.
Is supplied and the specified steam temperature is maintained.
The system can be operated with a sufficient amount of steam .

【0007】さて、このような制御形態(給水量に基づ
く制御と出口側蒸気温度に基づく制御)が必要となる理
由について以下に詳細に説明する。蒸気量の不足を補う
ために水の補給をおこなうと、過熱部では蒸気温度を上
昇させるのに時間遅れを生じ、水噴霧部では蒸気温度を
下降させるのに同じく時間遅れを生じる。さて、前記過
熱部と水噴霧部での伝熱量変化を検討すると、これら各
部位の構造に従って、例えば、過熱部での吸熱の時間遅
れと水噴霧部での放熱の時間遅れとには差がある。この
状況を図6に示した。図は、水噴霧に伴う過熱部と水噴
霧部での測定蒸気温度から求めた伝熱量変化を示してお
り、実線が水噴霧部のもの、点線が過熱部のもの、さら
に、一点鎖線が両者を合わせたものを示している。そし
て、同図に示すように、この例の場合は、水噴霧部の時
間遅れτdが過熱部の時間遅れτsより大きくなってい
る。そしてこの例のように、水噴霧部での放熱の時間遅
れが大きく、過熱部での吸熱の時間遅れとに差がある
と、この差が、蒸気温度を一時的に上昇させる。このよ
うな状況は、たとえ、前述のように蒸気が不足した時
不足分を水噴霧し、噴霧水量に対して必要とする追加熱
を追加して蒸気温度を一定にしようとする場合におい
ても、時間遅れの差に起因して誘起される。この状況が
図7に示されている。同図は、燃焼式過熱器出口に於け
る蒸気温度の時間的変化を実線で示しており、一時的な
温度上昇が発生することが判る。しかしながら、本願に
おいては、水噴霧量制御手段及び独特の動作をおこなう
過熱量制御手段を備え、さらに、過熱量制御手段が出口
蒸気温度に従って過熱量を制御するため、有効に蒸気温
度の変化を吸収して、この変動なしに過熱器の運転をす
ることができる。
Now, the reason why such a control form (control based on the amount of supplied water and control based on the outlet-side steam temperature) is required will be described in detail below. If water is replenished to compensate for the shortage of steam, a time delay occurs in raising the steam temperature in the superheated section, and a time delay occurs in lowering the steam temperature in the water spray section. Now, when examining the change in the amount of heat transfer between the superheated part and the water spray part, according to the structure of each of these parts, for example, the difference between the time delay of heat absorption in the superheated part and the time delay of heat release in the water spray part is different. is there. This situation is shown in FIG. The figure shows the change in heat transfer obtained from the measured steam temperature in the superheated part and the water spray part accompanying the water spray.The solid line shows the water spray part, the dotted line shows the superheated part, and the one-dot chain line shows both. Are shown. Then, as shown in the figure, in the case of this example, the time delay τ d of the water spray section is larger than the time delay τ s of the superheat section. And, as in this example, if the time delay of heat radiation in the water spray section is large and there is a difference between the time delay of heat absorption in the superheat section, this difference temporarily raises the steam temperature. This situation, for example, a <br/> shortfall when steam is insufficient as described above and water spray, additional heat that needs for the spray water
When trying to keep the steam temperature constant by adding an amount , it is also induced due to the difference in time delay. This situation is shown in FIG. In the figure, the solid line shows the temporal change of the steam temperature at the outlet of the combustion type superheater, and it can be seen that a temporary temperature rise occurs. However, the present application includes a water spray amount control unit and a superheat amount control unit that performs a unique operation, and furthermore, the superheat amount control unit controls the superheat amount according to the outlet steam temperature, so that the change in the steam temperature is effectively absorbed. Thus, the superheater can be operated without this fluctuation.

【0008】[0008]

【発明の効果】従って、過熱器から生成される蒸気の蒸
気量が経時的に安定して確保されるとともに、その蒸気
温度の変動も低く抑えられ、例えば、ごみ発電システム
に好適に使用することが可能な燃焼式過熱器を得て、例
えば、このような燃焼式過熱器を採用するごみ発電シス
テムにおいて、制御性を向上し、良好な安定発電操業を
得ることができた。
As described above, the amount of steam generated from the superheater can be stably secured over time, and the fluctuation of the steam temperature can be suppressed to a low level. Thus, for example, in a refuse power generation system employing such a combustion type superheater, controllability was improved, and a favorable stable power generation operation was obtained.

【0009】[0009]

【実施例】以下本願の実施例を図面に基づいて説明す
る。説明にあたっては、本願の燃焼式過熱器4を使用し
たゴミ発電システム100とともに説明する。図1に、
このゴミ発電システム100の構成が示されている。こ
のシステム100はゴミ焼却炉1に備えられる廃熱ボイ
ラ2と、この廃熱ボイラ2に接続される燃焼式過熱器4
と、発電用のタービン3とを備えて構成されている。従
って、ゴミ焼却炉1での発生熱を利用する廃熱ボイラ2
を用いて発生される蒸気は、燃焼式過熱器4に送られて
さらに過熱され、その後、発電用のタービン3に導かれ
て、発電の用に供される。燃焼式過熱器4は、図3から
図4に示すように、蒸気流路6内を流れる蒸気を燃焼ガ
スによって過熱する過熱炉7を備えるとともに、過熱器
4から生成される蒸気の温度または量を調節する注水機
構5と、その注水機構5の下流側の蒸気流路6に設けた
ドレン検出機構9を備えている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The description will be made together with the refuse power generation system 100 using the combustion type superheater 4 of the present application. In FIG.
The configuration of the garbage power generation system 100 is shown. The system 100 includes a waste heat boiler 2 provided in a refuse incinerator 1 and a combustion superheater 4 connected to the waste heat boiler 2.
And a turbine 3 for power generation. Therefore, the waste heat boiler 2 utilizing the heat generated in the refuse incinerator 1
Is sent to the combustion type superheater 4 where it is further superheated, and then guided to the power generation turbine 3 and used for power generation. As shown in FIGS. 3 to 4, the combustion type superheater 4 includes a superheater 7 that superheats the steam flowing in the steam flow path 6 with the combustion gas, and also controls the temperature or amount of the steam generated from the superheater 4. And a drain detection mechanism 9 provided in a steam flow path 6 downstream of the water injection mechanism 5.

【0010】即ち、この燃焼式過熱器4の蒸気流路6
は、路内を流れる蒸気が過熱炉7内で燃焼する燃焼ガス
によって過熱される過熱部6aと、給水噴霧操作される
水噴霧部6bとを備えた構成となっている。さらに、図
2に示すように、前記過熱部6aおいて蒸気に供給する
熱量を制御する過熱量制御手段と、蒸気流路に流入する
蒸気量が所定の蒸気量に対して不足する場合に、上述の
注水機構5を働かせて水噴霧部6bに不足量に見合う量
の水を噴霧する水噴霧量制御手段と、過熱器出口におけ
る蒸気温度を検出する蒸気温度検出手段14とを備えて
いる。そして、この過熱量制御手段は、上記の過熱部
において水噴霧量制御手段により噴霧される水の量に
見合って供給する熱量を増加する動作をおこなう構成が
採用されるとともに、蒸気温度検出手段14の検出結果
に基づいて、蒸気温度を所定の目標値になるように供給
する熱量を制御する構成が採用されている。ここで、こ
の制御は、過熱器出口における蒸気温度を入力とし、供
給熱量を制御するPID制御である。
That is, the steam flow path 6 of the combustion type superheater 4
Has a superheating section 6a in which steam flowing in the road is superheated by a combustion gas combusted in the superheating furnace 7, and a water spray section 6b which performs a water supply spray operation. Further, as shown in FIG. 2, when the amount of steam flowing into the steam flow path is insufficient with respect to a predetermined amount of steam, A water spray amount control means for spraying the water spray part 6b with an amount of water commensurate with the shortage amount by operating the water injection mechanism 5 described above, and a steam temperature detecting means 14 for detecting a steam temperature at the outlet of the superheater are provided. And this overheating amount control means is provided with the above-mentioned overheating section 6.
a , an operation of increasing the amount of heat supplied in accordance with the amount of water sprayed by the water spray amount control means is employed, and the steam temperature is set to a predetermined value based on the detection result of the steam temperature detection means 14 . A configuration is employed in which the amount of heat supplied to reach a target value is controlled. Here, this control is PID control in which the steam temperature at the outlet of the superheater is input and the amount of heat supplied is controlled.

【0011】前述の蒸気流路6の一部を成す過熱部6a
は、過熱炉7内に、複数の伝熱管4aを炉の上下方向に
並設して構成される三つの伝熱管群4bとして構成され
ている。この蒸気流路6の過熱器入口側には蒸気流量を
検出する流量センサ11が備えられ、過熱器出口側に
は、この部位における蒸気温度を検出する温度センサ1
4が備えられている。前述の水噴霧部6bは、伝熱管群
4b間に亘って設けられる蒸気流路6であって、過熱炉
7内から蒸気を外部に導き、さらに過熱炉7内に戻すべ
く、その炉頭上部側に設けられる一対の炉頭側蒸気流路
部12を備えて構成されている。図2に示すように、前
記過熱炉7には、バーナ7aと、このバーナ7aに燃焼
用酸素含有ガスである空気及び燃料ガスを供給する供給
機構7bと、この供給機構7bを動作制御する動作制御
手段7cが備えられている。そして、これらが全体とし
て、過熱量制御手段を構成している。さらにこの動作制
御手段7cは、過熱器4の下流側に設けられる温度セン
サ14からの検出温度を入力として、供給熱量をPID
制御するように構成されている。先に説明した注水機構
5とこの注水機構5に対する動作制御手段5a及び、過
熱器4の上流側に備えられ、且つ過熱器4に供給される
蒸気量を検出する流量センサ11が備えられており、前
述の動作制御手段5aは、ごみ発電を安定しておこなう
目的から、廃熱ボイラ2で発生した蒸気量が不足してい
ることが過熱器4の上流側に設けた流量センサ11で検
出された場合に、適量の水噴霧をおこなって、所定蒸気
流量が確保するものとして構成されている。従って、こ
れらが全体として水噴霧量制御手段を構成している。
A superheater 6a forming a part of the above-mentioned steam flow path 6
Is configured as three heat transfer tube groups 4b in which a plurality of heat transfer tubes 4a are juxtaposed in the vertical direction of the furnace in the superheating furnace 7. A flow sensor 11 for detecting a steam flow rate is provided on the inlet side of the superheater of the steam flow path 6, and a temperature sensor 1 for detecting a steam temperature at this portion is provided on the outlet side of the superheater.
4 are provided. The above-mentioned water spray section 6b is a steam flow path 6 provided between the heat transfer tube groups 4b, and an upper portion of the furnace head for guiding steam from the inside of the superheating furnace 7 to the outside and further returning the steam into the superheating furnace 7. It is provided with a pair of furnace head side steam flow path sections 12 provided on the side. As shown in FIG. 2, the superheated furnace 7 has a burner 7a, a supply mechanism 7b for supplying air and fuel gas as a combustion oxygen-containing gas to the burner 7a, and an operation for controlling the operation of the supply mechanism 7b. Control means 7c is provided. These elements together constitute an overheat control means. Further, the operation control means 7c receives the detected temperature from the temperature sensor 14 provided on the downstream side of the
It is configured to control. The water injection mechanism 5 described above, the operation control means 5 a for the water injection mechanism 5, and the flow sensor 11 provided upstream of the superheater 4 and detecting the amount of steam supplied to the superheater 4 are provided. The operation control means 5a detects that the amount of steam generated in the waste heat boiler 2 is insufficient by the flow sensor 11 provided on the upstream side of the superheater 4 for the purpose of stably generating waste power. In such a case, an appropriate amount of water is sprayed to secure a predetermined steam flow rate. Therefore, these constitute the water spray amount control means as a whole.

【0012】更に、この過熱器4には、図1に示すよう
に排ガスを炉内に再循環(循環量75%〜90%)する
循環路15が備えられており、低空気比燃焼と約90%
という高い熱効率(過熱量/燃焼熱量)を実現できる。
また、この再循環構造によって蒸気量変動によって追加
蒸気を発生するときの過熱量の制御が容易になる。
Further, as shown in FIG. 1, the superheater 4 is provided with a circulation path 15 for recirculating the exhaust gas into the furnace (circulation amount of 75% to 90%). 90%
High thermal efficiency (overheat amount / combustion heat amount).
Further, the recirculation structure facilitates control of the amount of superheat when additional steam is generated due to a change in the amount of steam.

【0013】以下に、廃熱ボイラ2からの蒸気量が減少
した場合の本願の過熱器4の動作について説明する。過
熱器4に流入する蒸気流量は流量センサ11によって常
時モニターされ、このセンサ11が検出する蒸気流量値
が所定の目標値よりも低くなると、水噴霧量制御手段が
働き、水噴霧部6aに所要量の水が噴霧される。この時
同時に、給水量に対して必要とされる熱量の追加補給
が、過熱量制御手段により図られる。しかしながら、過
熱部6bと水噴霧部6aにおいては、夫々の部位におい
て、異なった時間遅れを有するため、過熱器出口におけ
る蒸気温度が変動する。そこで、この蒸気温度は、蒸気
温度検出手段である温度センサ14によって検出され、
前述の過熱量制御手段が、出口蒸気温度をモニター入力
とするPID制御をおこなう。結果、蒸気の流量、温度
制御が有効に行われる。
Hereinafter, the operation of the superheater 4 of the present invention when the amount of steam from the waste heat boiler 2 is reduced will be described. The flow rate of the steam flowing into the superheater 4 is constantly monitored by the flow rate sensor 11, and when the steam flow rate value detected by the sensor 11 becomes lower than a predetermined target value, the water spray amount control means operates, and the water spray amount 6a is required. A quantity of water is sprayed. At this time, at the same time, additional replenishment of the amount of heat required for the amount of supplied water is achieved by the overheat amount control means. However, since the superheated section 6b and the water spray section 6a have different time delays in the respective sections, the steam temperature at the superheater outlet fluctuates. Then, this steam temperature is detected by the temperature sensor 14 which is a steam temperature detecting means,
The above-mentioned superheat amount control means performs PID control using the outlet steam temperature as a monitor input. As a result, the steam flow rate and temperature control are effectively performed.

【0014】以上が、本願の燃焼式過熱器4の構成であ
るが、以下、作動確認状況について説明する。 1.水噴霧状況 水噴霧性能の確認のため蒸気の過熱度と最大噴霧量の関
係を確認した。最大噴霧量とは、水噴霧時に噴霧水量す
べてがドレンが発生せずに水噴霧部6aで蒸気にできる
噴霧量をいう。ドレン発生の検知は蒸気流路6内の水噴
霧後の蒸気温度の分布、蒸気流路6を構成する配管表面
温度の測定、管表面のサーモグラフィ映像の三者を併用
して行った。結果、過熱度と最大噴霧水量の関係は、所
要の蒸気量に対して一段のみの噴霧で蒸気量の16%、
二段で噴霧すれば計21%の噴霧が可能であり、二段噴
霧可能な本願の燃焼式過熱器4においては、廃熱ボイラ
2からの蒸気量が、所定値に対して20%減少したとき
でも蒸気量は回復できることが確認できた。(ただし、
所定の蒸気量は615kg/hとした) 2.過熱器出口に於ける蒸気量と蒸気温度状況 注水機構5を作動させて水を蒸気流路6内に噴霧し(6
1kg/h)、蒸気量・蒸気温度の時間遅れをそれぞれ
確認した。結果、蒸気量はほぼ瞬時に回復し、燃焼式過
熱器出口蒸気温度の変動も殆どなかった。
The above is the configuration of the combustion type superheater 4 of the present application. The operation confirmation situation will be described below. 1. Water spray condition The relationship between the superheat degree of steam and the maximum spray amount was confirmed to confirm the water spray performance. The maximum spraying amount refers to a spraying amount that can be turned into steam in the water spraying unit 6a without draining all of the spraying water amount during water spraying. The detection of drainage was performed in combination with the distribution of the steam temperature after water spraying in the steam flow path 6, the measurement of the temperature of the surface of the pipe constituting the steam flow path 6, and the thermographic image of the pipe surface. As a result, the relationship between the degree of superheat and the maximum amount of sprayed water is 16% of the amount of steam with only one stage of spraying for the required amount of steam,
If spraying is performed in two stages, a total of 21% can be sprayed. In the combustion type superheater 4 of the present application capable of performing two-stage spraying, the amount of steam from the waste heat boiler 2 is reduced by 20% with respect to a predetermined value. It was confirmed that the amount of steam could be recovered at any time. (However,
(The predetermined steam amount was 615 kg / h.) The amount of steam and the steam temperature at the outlet of the superheater The water injection mechanism 5 is operated to spray water into the steam flow path 6 (6
1 kg / h), and time delays of the steam amount and the steam temperature were respectively confirmed. As a result, the steam amount recovered almost instantaneously, and there was almost no change in the steam temperature at the outlet of the combustion type superheater.

【0015】尚、特許請求の範囲の項に図面との対照を
便利にする為に符号を記すが、該記入により本発明は添
付図面の構成に限定するものではない。
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

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

【図1】ゴミ発電装置の構成図FIG. 1 is a configuration diagram of a garbage power generation device

【図2】過熱器の制御構成を示す図FIG. 2 is a diagram showing a control configuration of a superheater.

【図3】燃焼式過熱器の縦断面図FIG. 3 is a longitudinal sectional view of a combustion type superheater.

【図4】燃焼式過熱器の正面図FIG. 4 is a front view of a combustion type superheater.

【図5】燃焼式過熱器の一部切欠き平面図FIG. 5 is a partially cutaway plan view of a combustion type superheater.

【図6】水噴霧に伴う過熱部と水噴霧部での伝熱量変化
を示す図
FIG. 6 is a diagram showing a change in the amount of heat transfer between the superheated part and the water spray part due to the water spray.

【図7】燃焼式過熱器出口に於ける蒸気温度を示す図FIG. 7 is a diagram showing a steam temperature at an outlet of a combustion type superheater.

【符号の説明】[Explanation of symbols]

4 過熱器 6 蒸気流路 6a 過熱部 6b 水噴霧部11 蒸気流量検出手段 14 蒸気温度検出手段4 Superheater 6 Steam flow path 6a Superheating section 6b Water spray section 11 Steam flow rate detecting means 14 Steam temperature detecting means

フロントページの続き (72)発明者 二階堂 弘明 兵庫県尼崎市浜1丁目1番1号 株式会 社クボタ 技術開発研究所内 (56)参考文献 特開 平5−312301(JP,A) 特開 昭63−46303(JP,A) 特開 昭58−22806(JP,A)Continuation of the front page (72) Inventor Hiroaki Nikaido 1-1-1 Hama, Amagasaki-shi, Hyogo Kubota Research Institute of Technology Development (56) References JP-A-5-321301 (JP, A) JP-A-63- 46303 (JP, A) JP-A-58-22806 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 過熱対象の蒸気が流れる蒸気流路(6)
を備え、前記蒸気流路(6)に流路内を流れる蒸気を過
熱する過熱部(6a)と流路内を流れる蒸気に水噴霧し
て蒸気量を富化可能な水噴霧部(6b)とを備えるとと
もに、前記過熱部(6a)おいて蒸気に供給する熱量を
制御する過熱量制御手段備えた燃焼式過熱器であっ
て、過熱器入口における蒸気流量を検出する蒸気流量検出手
段(11)と、 過熱器出口における蒸気温度を検出する
蒸気温度検出手段(14)備えるとともに、前記蒸
気流量検出手段(11)で検出した蒸気流量が所定の目
標値よりも低くなると、前記水噴霧部(6a)に所要量
の水を噴霧する水噴霧量制御手段を設け前記噴霧する
水量に対して必要とする追加熱量の算出結果に基づき、
前記蒸気温度所定の目標値になるように前記過熱量制
御手段により前記供給する熱量を設定し、さらに、前記
蒸気温度検出手段(14)の検出結果に基づいて前記蒸
気温度を前記目標値に維持するように、前記過熱量制御
手段により前記供給する熱量をPID制御する燃焼式過
熱器。
1. A steam flow path through which a steam to be overheated flows.
A superheater (6a) for superheating steam flowing in the flow passage in the steam flow passage (6) and a water spray portion (6b) capable of enriching the amount of steam by spraying water on the steam flowing in the flow passage. A combustion type superheater comprising a superheat amount control means for controlling an amount of heat supplied to the steam in the superheater (6a), wherein a steam flow detecting means for detecting a steam flow at an inlet of the superheater.
A stage (11), and provided with a steam temperature detecting means for detecting the steam temperature in the superheater outlet (14), said steam
The steam flow rate detected by the air flow rate detecting means (11) is a predetermined value.
When the value becomes lower than the standard value, the required amount is added to the water spray section (6a).
Provided the water spray amount controlling means for spraying water to the spray
Based on the calculation result of the additional heat required for the amount of water,
The superheat rate control is performed so that the steam temperature reaches a predetermined target value.
The amount of heat to be supplied is set by control means.
Based on the detection result of the steam temperature detecting means (14),
The superheat amount control so as to maintain the air temperature at the target value.
A combustion type superheater for controlling the amount of heat supplied by means of PID .
JP6056962A 1994-03-28 1994-03-28 Combustion superheater Expired - Lifetime JP2725143B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6056962A JP2725143B2 (en) 1994-03-28 1994-03-28 Combustion superheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6056962A JP2725143B2 (en) 1994-03-28 1994-03-28 Combustion superheater

Publications (2)

Publication Number Publication Date
JPH07260105A JPH07260105A (en) 1995-10-13
JP2725143B2 true JP2725143B2 (en) 1998-03-09

Family

ID=13042170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6056962A Expired - Lifetime JP2725143B2 (en) 1994-03-28 1994-03-28 Combustion superheater

Country Status (1)

Country Link
JP (1) JP2725143B2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822806A (en) * 1981-07-31 1983-02-10 石川島播磨重工業株式会社 Controller for temperature of outlet of furnace path of boiler
JP2521722B2 (en) * 1986-08-12 1996-08-07 株式会社日立製作所 Steam temperature controller for thermal power boiler
JP2922711B2 (en) * 1992-05-08 1999-07-26 株式会社クボタ Urban waste incineration equipment

Also Published As

Publication number Publication date
JPH07260105A (en) 1995-10-13

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