JP2003056841A - Sensible heat recovering method of combustion exhaust gas - Google Patents
Sensible heat recovering method of combustion exhaust gasInfo
- Publication number
- JP2003056841A JP2003056841A JP2001243934A JP2001243934A JP2003056841A JP 2003056841 A JP2003056841 A JP 2003056841A JP 2001243934 A JP2001243934 A JP 2001243934A JP 2001243934 A JP2001243934 A JP 2001243934A JP 2003056841 A JP2003056841 A JP 2003056841A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- heat
- heat storage
- combustion exhaust
- exhaust gas
- 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.)
- Pending
Links
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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Air Supply (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、燃焼排ガス、特
に、金属腐食性成分を含有する燃焼排ガスの顕熱回収方
法に関するものである。
【０００２】
【従来の技術】従来、燃焼排ガスの顕熱回収方法とし
て、ボール状のセラミック製蓄熱媒体を充填した蓄熱室
を介して熱交換する方法がある。その一形態に、熱交換
部を一対の蓄熱室で構成し、一方の蓄熱室に前記燃焼排
ガスを供給して前記蓄熱媒体を加熱したのち、この蓄熱
室に空気等の常温気体を供給して加熱するとともに、他
方の蓄熱室に燃焼排ガスを供給することにより、一対の
蓄熱室で交互に空気等を加熱するものがある。
【０００３】この方法は、１０００℃以上の燃焼排ガス
から直接顕熱を回収することができるから、燃焼排ガス
の顕熱回収効率がよいという利点がある。
【０００４】
【発明が解決しようとする課題】しかしながら、燃焼排
ガス中にナトリウムあるいはカリウム等の金属に対して
腐食性成分を含有していると、前記燃焼排ガスが蓄熱室
内を通過する間、すなわち、前記燃焼排ガスが蓄熱媒体
に接触して当該蓄熱媒体を加熱する間、これらの金属腐
食性成分が前記セラミック製蓄熱媒体に付着し、熱交換
した後の被加熱気体（空気等）に前記付着物の一部が剥
離して加熱気体に微量の不純物（金属腐食性成分）が混
入することになり、清浄な加熱気体を得ることができ
ず、たとえば、この加熱気体（空気）をガスタービン用
高温ガスに使用するとすれば、タービンブレードを腐食
することになるという課題を有していた。
【０００５】また、金属製チューブ内を予熱空気が流れ
る管式間接熱交換器では、前述の問題はないが、燃焼排
ガスが金属腐食性成分を有し、かつ、１０００℃以上で
あれば、金属の耐熱性および耐腐食性の観点から燃焼排
ガスを希釈空気で約８５０℃以下まで降温して使用する
必要があり、熱効率が悪いという課題を有する。
【０００６】したがって、本発明は、金属腐食性成分を
含有する高温の燃焼排ガスから顕熱を、熱効率をあまり
低下させずに回収することができる燃焼排ガスの顕熱回
収方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】本発明は、前記目的を達
成させるためになされたもので、ボール状セラミックス
製蓄熱媒体を充填した蓄熱室に、金属腐食性成分を含有
する燃焼排ガスを供給して当該蓄熱室のボール状セラミ
ックス製蓄熱媒体を加熱したのち、この蓄熱室に第１気
体を供給して当該気体を加熱し、この加熱された第１気
体と第２気体とを管式間接熱交換器で熱交換する燃焼排
ガスの顕熱回収方法である。
【０００８】
【発明の実施の形態】つぎに、本発明の実施の形態につ
いて図にしたがって説明する。図において、１は蓄熱式
熱交換器で、この蓄熱式熱交換器１は、ボール状のセラ
ミック製蓄熱体Ｓを収納した一対の第１蓄熱室２Ａと第
２蓄熱室２Ｂとからなり、各蓄熱室２Ａ，２Ｂの下部
（一方部）はそれぞれ第１下部連通管Ｐ１と第２下部連
通管Ｐ２で連通するとともに、各蓄熱室２Ａ，２Ｂの上
部（他方部）もそれぞれ第１上部連通管Ｐ３と第２上部
連通管Ｐ４で連通する。
【０００９】また、前記第１、第２下部連通管Ｐ１，Ｐ
２と第１、第２上部連通管Ｐ３，Ｐ ４にはそれぞれ第１
〜第４切換弁Ｖ１〜Ｖ４が配設されている。
【００１０】６は、下記第１気体である高温気体と下記
する清浄気体である第２気体とを熱交換する金属製管式
間接熱交換器で、蛇管７内を第２気体が流れる。
【００１１】そして、前記第１下部連通管Ｐ１は第１切
換弁Ｖ１により前記金属製管式間接熱交換器６に連通
し、第２下部連通管Ｐ２は第２切換弁Ｖ２により約１２
５０℃の金属腐食性成分を含有する燃焼排ガス供給管３
に接続され、第１上部連通管Ｐ ３は第３切換弁Ｖ３によ
り第１気体供給管４に接続され、第２上部連通管Ｐ４は
第４切換弁Ｖ４により大気放出管５に接続されている。
【００１２】つぎに、前記構成からなる燃焼排ガスの顕
熱回収装置により顕熱回収方法を説明する。
【００１３】まず、第１切換弁Ｖ１を切り換えて第２蓄
熱室２Ｂの下部と金属製管式間接熱交換器６に接続し、
第２切換弁Ｖ２を切り換えて燃焼排ガス供給管３と第１
蓄熱室２Ａの下部とを連通し、第３切換弁Ｖ３は第２蓄
熱室２Ｂ上部と第１気体供給管４とを連通し、第４切換
弁Ｖ４は第１蓄熱室２Ａ上部を大気放出管５に接続し、
第１蓄熱室２Ａに１２５０℃の金属腐食性成分を含有す
る燃焼排ガスを供給し、第１蓄熱室２Ａ内の蓄熱媒体Ｓ
を約１２５０℃に加熱し、その間に金属腐食性成分の大
半は蓄熱媒体Ｓの表面に付着除去されて大気放出管５か
ら放出する（図１の状態）。
【００１４】そして、所定時間（約１〜２分）経過する
と、第１切換弁Ｖ１を切り換えて第１蓄熱室２Ａの下部
を金属製管式間接熱交換器６に接続し、第２切換弁Ｖ２
を切り換えて燃焼排ガス供給管３を第２蓄熱室２Ｂの下
部に接続し、第３切換弁Ｖ３を切り換えて第１蓄熱室２
Ａの上部に第１気体供給管４を接続するとともに、第４
切換弁Ｖ４を切り換えて第２蓄熱体２Ｂの上部を大気放
出管５に接続する。
【００１５】すなわち、蓄熱媒体Ｓが１２５０℃に加熱
された第１蓄熱室２Ａに供給された第１気体は、約１１
００℃に加熱され、第２気体は管式間接熱交換器６で前
記第１気体と間接的に熱交換されて約８５０℃に加熱さ
れる。
【００１６】そして、所定時間後、第１〜第４切換弁Ｖ
１〜Ｖ４が切り換わり、以降、前記同様、高温の燃焼排
ガスは交互に第１、第２蓄熱室２Ａ，２Ｂに供給され、
第２気体（清浄気体）は連続して所定温度に加熱されて
ガスタービンへ供給されることになる。
【００１７】なお、前述のように、燃焼排ガス中の金属
腐食性成分は蓄熱媒体Ｓの表面に付着して除去されるも
のの、所定時間後に供給される第１気体中に一部が剥離
して混入するが、微量のため、管式間接熱交換器６中の
蛇管７の腐食にあまり影響を及ぼさないため、前記管式
間接熱交換器６へ１１００℃の高温の第１気体を供給す
ることができる。
【００１８】前記説明では，第２気体をガスタービンに
供給する場合について述べたが、ガスタービンでなくて
も、金属腐食性成分により腐食される危険がある場所で
あればよいことは勿論である。
【００１９】また、前記説明では、第２気体を管式間接
熱交換器６の蛇管７を流す場合について述べたが、第１
気体が蛇管内を流れてもよい。さらに、前記説明では、
一対の蓄熱室で構成する場合について述べたが、複数対
で構成してもよく、また、回転方式で構成してもよい。
【００２０】
【発明の効果】以上の説明で明らかなように、本発明に
よれば、ボール状セラミックス製蓄熱媒体を収納した蓄
熱室に、金属腐食性成分を含有する燃焼排ガスを供給し
て当該蓄熱室のボール状セラミックス製蓄熱媒体を加熱
したのち、この蓄熱室に第１気体を供給して当該気体を
加熱し、この加熱された第１気体により管式間接熱交換
器で第２気体を熱交換するもので、前記金属腐食性成分
の大部分を蓄熱媒体表面に付着除去させ、含有金属腐食
性成分が少なくなった高温の第１気体で清浄な第２気体
を管式間接熱交換器により熱交換させて加熱するため、
管式間接熱交換器へは約１１００℃の第１気体を供給で
き、効率よく清浄な高温第２気体を得ることができる。DETAILED DESCRIPTION OF THE INVENTION
[0001]
TECHNICAL FIELD The present invention relates to a combustion exhaust gas,
Sensible heat recovery of combustion exhaust gas containing metal corrosive components
It is about the law.
[0002]
2. Description of the Related Art Conventionally, a method for recovering sensible heat of flue gas has been proposed.
Heat storage chamber filled with a ball-shaped ceramic heat storage medium
There is a method of exchanging heat through. One form is heat exchange
Section is composed of a pair of heat storage chambers, and the combustion exhaust
After supplying the gas to heat the heat storage medium, the heat storage medium
While supplying room temperature gas such as air to the room to heat it,
By supplying combustion exhaust gas to one of the heat storage chambers,
There is one that heats air or the like alternately in a heat storage chamber.
[0003] This method uses a combustion exhaust gas of 1000 ° C or higher.
Sensible heat can be recovered directly from
Has the advantage that the sensible heat recovery efficiency is good.
[0004]
However, the combustion exhaust
For metals such as sodium or potassium in gas
When a corrosive component is contained, the combustion exhaust gas
While the combustion exhaust gas passes through the heat storage medium
While heating the heat storage medium in contact with
The edible components adhere to the ceramic heat storage medium,
Some of the deposits are peeled off by the heated gas (air, etc.)
A small amount of impurities (metal corrosive components) mixed with the heated gas
To get a clean heated gas
For example, this heated gas (air) is
Corrosion of turbine blades if used for hot gases
Had the problem that
Further, preheated air flows through the metal tube.
The tubular indirect heat exchanger does not have the above problems,
The gas has a metal corrosive component, and at 1000 ° C. or higher
If there is, combustion emission from the viewpoint of heat resistance and corrosion resistance of metal
Use the gas after lowering the temperature to about 850 ° C or less with diluted air
And has the problem of poor thermal efficiency.
[0006] Accordingly, the present invention provides a method for removing metal corrosive components.
Sensible heat from high-temperature flue gas contained
Sensible heat recovery of combustion exhaust gas that can be recovered without lowering
The purpose is to provide a collection method.
[0007]
The present invention achieves the above object.
Ball-shaped ceramics
Contains metal corrosive components in the heat storage chamber filled with heat storage medium
To supply the burning exhaust gas,
After heating the heat storage medium made of
The body is supplied to heat the gas, and the heated first air
Exhaust that exchanges heat between the body and the second gas in a tubular indirect heat exchanger
This is a method for recovering sensible heat of gas.
[0008]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described.
And will be described with reference to the drawings. In the figure, 1 is a heat storage type
This regenerative heat exchanger 1 is a ball-shaped ceramic heat exchanger.
A pair of first heat storage chambers 2A containing
2 heat storage chambers 2B, the lower part of each heat storage chamber 2A, 2B
(One part) is the first lower communication pipe P1And the second lower ream
Tubing P2At the same time, and above each heat storage chamber 2A, 2B.
Part (the other part) is also the first upper communicating pipe P3And the second upper part
Communication pipe P4Communicate with.
The first and second lower communication pipes P1, P
2And the first and second upper communication pipes P3, P 4Has the first
~ 4th switching valve V1~ V4Are arranged.
Reference numeral 6 denotes a high-temperature gas which is the following first gas and
Metal tube type that exchanges heat with the second gas that is a clean gas
In the indirect heat exchanger, the second gas flows inside the flexible tube 7.
The first lower communication pipe P1Is the first cut
Exchange valve V1Communicates with the metal tubular indirect heat exchanger 6
And the second lower communication pipe P2Is the second switching valve V2About 12
A flue gas supply pipe 3 containing a metal corrosive component at 50 ° C.
And the first upper communication pipe P 3Is the third switching valve V3By
Connected to the first gas supply pipe 4 and the second upper communication pipe P4Is
Fourth switching valve V4Is connected to the atmosphere discharge pipe 5.
Next, the emission of the combustion exhaust gas having the above-described structure will be described.
A sensible heat recovery method using a heat recovery device will be described.
First, the first switching valve V1Switch to the second storage
Connected to the lower part of the heat chamber 2B and the metal tubular indirect heat exchanger 6,
Second switching valve V2By switching the flue gas supply pipe 3 and the first
The third switching valve V communicates with the lower part of the heat storage chamber 2A.3Is the second stock
The upper part of the heat chamber 2B communicates with the first gas supply pipe 4, and the fourth switching is performed.
Valve V4Connects the upper part of the first heat storage chamber 2A to the atmosphere discharge pipe 5,
The first heat storage chamber 2A contains a metal corrosive component at 1250 ° C.
Storage exhaust medium S in the first heat storage chamber 2A.
Is heated to about 1250 ° C., during which time large amounts of metal corrosive components
Half is attached and removed on the surface of the heat storage medium S and
(Fig. 1).
Then, a predetermined time (about 1 to 2 minutes) elapses
And the first switching valve V1To the lower part of the first heat storage chamber 2A.
Is connected to the metallic tubular indirect heat exchanger 6 and the second switching valve V2
To move the flue gas supply pipe 3 under the second heat storage chamber 2B.
Section, and the third switching valve V3To switch to the first heat storage chamber 2
A first gas supply pipe 4 is connected to the upper part of
Switching valve V4To release the upper part of the second heat storage body 2B to the atmosphere.
Connect to outlet 5.
That is, the heat storage medium S is heated to 1250 ° C.
The first gas supplied to the first heat storage chamber 2A is approximately 11
Heated to 00 ° C., the second gas is passed through a tubular indirect heat exchanger 6
Indirect heat exchange with the first gas and heating to about 850 ° C
It is.
After a predetermined time, the first to fourth switching valves V
1~ V4Is switched, and thereafter, the high-temperature combustion
The gas is alternately supplied to the first and second heat storage chambers 2A and 2B,
The second gas (clean gas) is continuously heated to a predetermined temperature.
It will be supplied to the gas turbine.
As described above, the metal in the combustion exhaust gas
The corrosive component adheres to the surface of the heat storage medium S and is removed.
However, a part of the first gas supplied after a predetermined time is peeled off
However, due to the trace amount, the amount of water in the tubular indirect heat exchanger 6
Since it does not significantly affect the corrosion of the flexible pipe 7, the pipe type
Supply 1100 ° C. high temperature first gas to indirect heat exchanger 6
Can be
In the above description, the second gas is supplied to the gas turbine.
I mentioned the case of supply, but not a gas turbine
In places where there is a danger of being corroded by corrosive metals.
Needless to say, it is only necessary.
Further, in the above description, the second gas is supplied in a tubular indirect manner.
The case where the flexible tube 7 of the heat exchanger 6 flows is described.
Gas may flow through the coil. Further, in the above description,
Although the case where it is composed of a pair of heat storage chambers has been described,
And may be constituted by a rotation method.
[0020]
As is apparent from the above description, the present invention
According to this, the heat storage medium containing the ball-shaped ceramics heat storage medium was stored.
Supply combustion exhaust gas containing metal corrosive components to the heat chamber
To heat the ball-shaped ceramic heat storage medium in the heat storage chamber
After that, the first gas is supplied to this heat storage chamber to
Is heated, and the heated first gas is used for indirect tubular heat exchange.
Heat exchange of the second gas in the vessel, wherein the metal corrosive component
Most of the metal adheres to the surface of the thermal storage medium and is removed,
High temperature first gas and clean second gas with reduced content of volatile components
Is heated by exchanging heat with a tubular indirect heat exchanger,
The first gas at about 1100 ° C can be supplied to the tubular indirect heat exchanger.
As a result, a clean high-temperature second gas can be obtained efficiently.
【図面の簡単な説明】
【図１】 本発明方法を実施する燃焼排ガスからの顕熱
回収装置を示す図である。
【符号の説明】
１・・・蓄熱式熱交換器、２Ａ，２Ｂ・・・蓄熱室、３・・・燃
焼排ガス供給管、４・・・第１気体供給管、５・・・大気放出
管、６・・・管式間接熱交換器、７・・・蛇管、Ｐ１〜Ｐ４・・
・連通管、Ｖ１〜Ｖ４・・・切換弁、Ｓ〜蓄熱媒体。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an apparatus for recovering sensible heat from flue gas for carrying out the method of the present invention. [Description of Signs] 1 ... heat storage type heat exchanger, 2A, 2B ... heat storage chamber, 3 ... combustion exhaust gas supply pipe, 4 ... first gas supply pipe, 5 ... atmosphere discharge pipe , 6 ... tube type indirect heat exchanger, 7 ... flexible tube, P 1 to P 4 · ·
- communicating pipe, V 1 ~V 4 ··· switching valve, s to the heat storage medium.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２８Ｄ 20/00 Ｆ２８Ｄ 20/00 Ａ Ｆターム(参考） 3K023 QA12 QB02 QB03 QC05 QC12 QC13 RA01 3K065 AA24 AB01 AC19 BA01 JA05 JA15 JA19 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) F28D 20/00 F28D 20/00 A F term (reference) 3K023 QA12 QB02 QB03 QC05 QC12 QC13 RA01 3K065 AA24 AB01 AC19 BA01 JA05 JA15 JA19
Claims (1)
した蓄熱室に、金属腐食性成分を含有する燃焼排ガスを
供給して当該蓄熱室のボール状セラミックス製蓄熱媒体
を加熱したのち、この蓄熱室に第１気体を供給して当該
気体を加熱し、この加熱された第１気体と第２気体とを
管式間接熱交換器で熱交換することを特徴とする燃焼排
ガスの顕熱回収方法。Claims: 1. A combustion exhaust gas containing a metal corrosive component is supplied to a heat storage chamber filled with a heat storage medium made of a ceramic ball to heat the heat storage medium made of a ceramic ball in the heat storage chamber. Thereafter, the first gas is supplied to the heat storage chamber to heat the gas, and the heated first gas and the second gas are heat-exchanged by a tubular indirect heat exchanger. Sensible heat recovery method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001243934A JP2003056841A (en) | 2001-08-10 | 2001-08-10 | Sensible heat recovering method of combustion exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001243934A JP2003056841A (en) | 2001-08-10 | 2001-08-10 | Sensible heat recovering method of combustion exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003056841A true JP2003056841A (en) | 2003-02-26 |
Family
ID=19073947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001243934A Pending JP2003056841A (en) | 2001-08-10 | 2001-08-10 | Sensible heat recovering method of combustion exhaust gas |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013064584A (en) * | 2011-09-16 | 2013-04-11 | Yu Po Lee | Heat recovery system of high-temperature exhaust |
| JP2014520243A (en) * | 2011-06-09 | 2014-08-21 | ネスト アーエス | Thermal energy storage device and plant, method and use thereof |
| JP2017537269A (en) * | 2014-10-17 | 2017-12-14 | カーボン−クリーン テクノロジーズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method of compensating for load peaks during energy generation and / or generating electrical energy and / or generating hydrogen and storage power plant |
| WO2022134226A1 (en) * | 2020-12-23 | 2022-06-30 | 山东科技大学 | High-temperature flue gas molten salt heat exchanger and heat exchange method |
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2001
- 2001-08-10 JP JP2001243934A patent/JP2003056841A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014520243A (en) * | 2011-06-09 | 2014-08-21 | ネスト アーエス | Thermal energy storage device and plant, method and use thereof |
| US10107563B2 (en) | 2011-06-09 | 2018-10-23 | Nest As | Thermal energy storage and plant, method and use thereof |
| JP2013064584A (en) * | 2011-09-16 | 2013-04-11 | Yu Po Lee | Heat recovery system of high-temperature exhaust |
| JP2017537269A (en) * | 2014-10-17 | 2017-12-14 | カーボン−クリーン テクノロジーズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method of compensating for load peaks during energy generation and / or generating electrical energy and / or generating hydrogen and storage power plant |
| WO2022134226A1 (en) * | 2020-12-23 | 2022-06-30 | 山东科技大学 | High-temperature flue gas molten salt heat exchanger and heat exchange method |
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