JPH0526428A - Collecting process for co2 in exhaust gas produced by combustion of waste - Google Patents
Collecting process for co2 in exhaust gas produced by combustion of wasteInfo
- Publication number
- JPH0526428A JPH0526428A JP3181423A JP18142391A JPH0526428A JP H0526428 A JPH0526428 A JP H0526428A JP 3181423 A JP3181423 A JP 3181423A JP 18142391 A JP18142391 A JP 18142391A JP H0526428 A JPH0526428 A JP H0526428A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- combustion chamber
- combustion
- furnace
- waste
- 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
- Y02E20/32—Direct CO2 mitigation
Landscapes
- Chimneys And Flues (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃棄物溶融炉における
廃棄物燃焼排ガス中のＣＯ2 回収方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering CO 2 in waste combustion exhaust gas in a waste melting furnace.
【０００２】[0002]
【従来の技術】従来より、都市ごみ、産業廃棄物、下水
汚泥等の廃棄物を処理する方法としては、廃棄物焼却炉
内で廃棄物を温度750 〜950 ℃で焼却処理する方法が最
も一般的であった。2. Description of the Related Art Conventionally, the most common method of treating municipal waste, industrial waste, sewage sludge, etc. is to incinerate the waste in a waste incinerator at a temperature of 750 to 950 ° C. It was target.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来の方
法では、廃棄物焼却炉内に燃焼用空気を供給するので、
燃焼排ガス中のＣＯ2 ガス含有率が10％以下（乾ガス基
準）になっている。そのため、燃焼排ガス中のＣＯ2 を
除去しようとする場合、ＣＯ2 濃度が低過ぎて、ＣＯ2
の除去が技術的にも経済的にも非常に困難であった。だ
からといって、ＣＯ2 濃度を高めるために空気の代わり
に純酸素を使用した場合には、温度1500℃以上にもな
り、炉体を損傷するおそれがあった。However, in the above-mentioned conventional method, since the combustion air is supplied into the waste incinerator,
The CO 2 gas content in the combustion exhaust gas is 10% or less (dry gas standard). Therefore, when attempting to remove the CO 2 in the combustion exhaust gas, CO 2 concentration is too low, CO 2
Was very difficult both technically and economically. However, when pure oxygen is used instead of air to increase the CO 2 concentration, the temperature rises to 1500 ° C. or higher, which may damage the furnace body.
【０００４】本発明は、従来の方法を改良して、このよ
うな問題点を解消することを目的とする。It is an object of the present invention to improve the conventional method and eliminate such problems.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の廃棄物燃焼排ガス中のＣＯ2 回収方法は、
燃焼室の全周に被処理物供給路を接続し、前記燃焼室の
底部中央に燃焼ガス及び溶融物兼用の排出孔を形成して
なる廃棄物溶融炉において、前記燃焼室内に純酸素を供
給しながら燃焼室内で被処理物を燃焼かつ溶融させ、前
記排出孔から燃焼ガス及び溶融物を炉外に排出した後燃
焼ガスを再燃焼させ、再燃焼した排ガスから水分を除去
した後ＣＯ2 を回収し、然る後に排ガスの一部を前記燃
焼室内に循環させて炉温を制御するとともに、排ガスの
残部を大気中に放出する構成となっている。In order to achieve the above object, the method for recovering CO 2 in waste combustion exhaust gas according to the present invention comprises:
Supplying pure oxygen into the combustion chamber in a waste melting furnace in which a material supply passage is connected to the entire circumference of the combustion chamber and a discharge hole for combustion gas and melt is formed in the bottom center of the combustion chamber. While the object to be treated is burned and melted in the combustion chamber, the combustion gas and the molten material are discharged from the discharge hole to the outside of the furnace, the combustion gas is recombusted, and water is removed from the reburned exhaust gas to remove CO 2 . After recovery, after that, a part of the exhaust gas is circulated in the combustion chamber to control the furnace temperature, and the rest of the exhaust gas is discharged into the atmosphere.
【０００６】[0006]
【作用】上記構成の方法においては、燃焼用空気の代わ
りに純酸素を燃焼室内に供給するので、排ガス中にはＮ
2 が殆んど含まれず、ＣＯ2 の濃度が高まる。また、排
ガスの一部を燃焼室内に循環させて炉温を制御している
ので、炉温の過上昇が防止され、炉体の損傷が無くな
る。さらに、排ガス中の水分を除去した後ＣＯ2 を回収
するので、ＣＯ2 を直接回収することができる。In the method of the above construction, pure oxygen is supplied into the combustion chamber instead of combustion air, so that N 2 is contained in the exhaust gas.
Almost no 2 is contained, and the concentration of CO 2 increases. Further, since a part of the exhaust gas is circulated in the combustion chamber to control the furnace temperature, the furnace temperature is prevented from excessively rising and damage to the furnace body is eliminated. Furthermore, since CO 2 is recovered after removing water in the exhaust gas, CO 2 can be directly recovered.
【０００７】[0007]
【実施例】以下、本発明の一実施例を図１に基づいて説
明する。図１は、本発明を利用する廃棄物処理設備の一
例を示す概略図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic diagram showing an example of a waste treatment facility utilizing the present invention.
【０００８】この廃棄物処理設備は、図示のように工程
順に、供給ピット１、廃棄物溶融炉２、再燃焼室３、廃
熱ボイラ４、集塵装置５、排ガス処理装置６、ＣＯ2 吸
収装置７、ファン８及び煙突９から構成されている。供
給ピット１は、都市ごみ、産業廃棄物、下水汚泥等の廃
棄物から金属類を除去した被処理物10を貯留している。
廃棄物溶融炉２は、燃焼室11の上部中央にバーナ12を設
け、燃焼室11の全周に被処理物供給路13を接続し、燃焼
室11の底部中央に燃焼ガス14及び溶融物15兼用の排出孔
16を形成してなるもので、バーナ12には酸素発生装置17
が接続され、また排出孔16の出口側は、煙道18を介して
再燃焼室３に接続されるとともに、溶融物排出路19を介
して搬送機20に接続されている。酸素発生装置17は、空
気からＮ 2 を除去して、純酸素21を燃焼室11内に供給す
るためのものである。さらに、ＣＯ2 吸収装置７の下流
側と燃焼室11との間には排ガス循環路22が接続されてい
る。この排ガス循環路22は、中間にファン23を備え、排
ガス24を燃焼室11内に循環させて、炉温を制御するため
ものである。また、炉温制御用の排ガスの取り出しは経
路２５でも良い。This waste treatment facility is operated as shown in the figure.
Supply pit 1, waste melting furnace 2, reburning chamber 3, waste
Heat boiler 4, dust collector 5, exhaust gas treatment device 6, CO2 Sucking
It is composed of a collecting device 7, a fan 8 and a chimney 9. Companion
The supply pit 1 is for the disposal of municipal waste, industrial waste, sewage sludge, etc.
The object to be processed 10 from which metals have been removed from waste is stored.
The waste melting furnace 2 has a burner 12 installed in the upper center of the combustion chamber 11.
In order to burn the material, the workpiece supply path 13 is connected to the entire circumference of the combustion chamber 11.
Discharge hole for the combustion gas 14 and the melt 15 in the center of the bottom of the chamber 11
The burner 12 has an oxygen generator 17
Is connected to the outlet side of the exhaust hole 16 through the flue 18.
It is connected to the re-combustion chamber 3 and through the melt discharge passage 19.
And is connected to the carrier 20. Oxygen generator 17 is empty
From mind N 2 Is removed and pure oxygen 21 is supplied into the combustion chamber 11.
It is for the purpose. Furthermore, CO2 Downstream of absorber 7
An exhaust gas circulation path 22 is connected between the side and the combustion chamber 11.
It This exhaust gas circulation path 22 is equipped with a fan 23 in the middle,
To circulate the gas 24 in the combustion chamber 11 to control the furnace temperature
It is a thing. Also, it is necessary to take out the exhaust gas for controlling the furnace temperature.
Road 25 is also acceptable.
【０００９】上記構成の廃棄物処理設備において、供給
ピット１から被処理物10を廃棄物溶融炉２の被処理物供
給路13内に供給すると、被処理物10は同供給路13内を自
重降下して燃焼室11に至る。燃焼室11は、酸素発生装置
17から純酸素21がバーナ12を介して供給されており、13
00℃以上の高温下で被処理物10を燃焼させた後溶融させ
る。被処理物１０の燃焼熱を溶融熱源として利用できる
ので補助燃料なしで直接溶融が可能であり、このように
高温で燃焼、溶融させるので、ダイオキシン類の発生が
非常に少く、その除去のための二次処理装置は不要であ
る。燃焼室11内に生じた燃焼ガス14及び溶融物15は排出
孔16から炉外に排出され、燃焼ガス14は煙道18を経由し
て再燃焼室３内で再燃焼させられるとともに、溶融物15
は溶融物排出路19を経由してスラグ状になり、搬送機20
により取り出されて有効利用される。燃焼ガス14の再燃
焼により生じた排ガス24は、廃熱ボイラ４で蒸気を発生
させた後集塵装置５で集塵される。発生した蒸気は発電
等に利用され、ダストは安定化処理処分又は再利用され
る。発電された電力は酸素発生装置１７の動力源として
利用される。集塵された排ガス24は排ガス処理装置６で
水分を除去される。その際、排ガス24はその大部分が水
分及びＣＯ2 から構成され、Ｎ2 を殆んど含んでいない
ので、排ガス24の量は従来の1/3 以下になっており、排
ガス処理装置６を小形にすることができる。水分を除去
された排ガス24はＣＯ2 吸収装置７でＣＯ2 を直接回収
される。回収されたＣＯ2 は、固定され、安定化処理処
分又は再利用される。ＣＯ2 を回収された排ガス24は、
その一部がファン23により排ガス循環路22を経由して廃
棄物溶融炉２の燃焼室11内に循環され、炉温を制御して
炉温の過上昇による炉体の損傷を防止するとともに、排
ガス24の残部はファン８により煙突９を経由して大気中
に放出される。In the waste treatment facility having the above structure, when the object 10 to be treated is supplied from the supply pit 1 into the object supply path 13 of the waste melting furnace 2, the object 10 is self-weighted in the object supply path 13. It descends and reaches the combustion chamber 11. The combustion chamber 11 is an oxygen generator.
Pure oxygen 21 is supplied from 17 through the burner 12, and 13
The object to be treated 10 is burned at a high temperature of 00 ° C. or higher and then melted. Since the heat of combustion of the object to be treated 10 can be used as a heat source for melting, it can be directly melted without auxiliary fuel. Since it burns and melts at a high temperature in this way, the generation of dioxins is very small, No secondary processing equipment is required. The combustion gas 14 and the melt 15 generated in the combustion chamber 11 are discharged to the outside of the furnace through the discharge holes 16, and the combustion gas 14 is re-combusted in the re-combustion chamber 3 via the flue 18 and the melt is generated. 15
Becomes slag-like via the melt discharge path 19, and the carrier 20
It is taken out and used effectively. Exhaust gas 24 generated by re-combustion of combustion gas 14 is collected in dust collector 5 after steam is generated in waste heat boiler 4. The generated steam is used for power generation, etc., and the dust is stabilized or disposed of or reused. The generated electric power is used as a power source for the oxygen generator 17. The collected exhaust gas 24 has its moisture removed by the exhaust gas treatment device 6. At that time, since most of the exhaust gas 24 is composed of water and CO 2 and contains almost no N 2 , the amount of the exhaust gas 24 is 1/3 or less of the conventional amount, and the exhaust gas treatment device 6 is Can be made small. Exhaust 24 which moisture has been removed is recovered CO 2 directly in a CO 2 absorber 7. The recovered CO 2 is fixed, stabilized, disposed of, or reused. The exhaust gas 24 from which CO 2 has been recovered is
A part of it is circulated in the combustion chamber 11 of the waste melting furnace 2 through the exhaust gas circulation path 22 by the fan 23 to control the furnace temperature and prevent damage to the furnace body due to excessive rise of the furnace temperature. The rest of the exhaust gas 24 is discharged into the atmosphere by the fan 8 via the chimney 9.
【００１０】[0010]
【発明の効果】以上述べたように本発明によれば、廃棄
物溶融炉の燃焼室内に燃焼用空気の代わりに純酸素を供
給して被処理物を燃焼かつ溶融させるので、排ガスはそ
の大部分が水分及びＣＯ2 から構成され、Ｎ2 を殆んど
含まないので、排ガス中のＣＯ 2 濃度が高まってＣＯ2
回収が容易になるとともに、排ガスの量が減少して排ガ
ス中の水分を除去する装置が小形になる。また、高温下
で被処理物を燃焼かつ溶融させることができるので、補
助燃料なしでの直接溶融が可能となって運転経費が低減
するとともに、ダイオキシン類の発生が非常に少なくな
って、それを除去するための二次処理装置が不要にな
る。また、ＣＯ2 回収後の排ガスの一部を燃焼室に循環
させて炉温を制御するので、高温下の運転でも、炉温の
過上昇による炉体の損傷を防止することができる。さら
に、排ガスはその大部分が水分及びＣＯ2 から構成され
るため、水分を除去することによりＣＯ2 の直接回収が
可能である。As described above, according to the present invention, disposal
Pure oxygen is supplied to the combustion chamber of the melting furnace instead of combustion air.
Supply the gas to burn and melt the material to be treated, so the exhaust gas
Most of the water and CO2 Consists of N2 Almost
Because it does not contain CO in exhaust gas 2 CO increases in concentration2
Recovery becomes easier, and the amount of exhaust gas decreases and exhaust gas
The device for removing water in the screen becomes smaller. Also, under high temperature
Since the object to be processed can be burned and melted by
Direct melting without auxiliary fuel is possible and operating costs are reduced.
And the generation of dioxins is extremely low.
The secondary processing equipment to remove it is no longer needed.
It Also, CO2 Circulates part of the exhaust gas after recovery to the combustion chamber
Since the furnace temperature is controlled by controlling the temperature of the furnace,
It is possible to prevent damage to the furnace body due to excessive rise. Furthermore
Most of the exhaust gas is water and CO2 Consists of
Therefore, by removing water, CO2 Direct recovery of
It is possible.
【図１】本発明を利用する廃棄物処理設備の一例を示す
概略図である。FIG. 1 is a schematic diagram showing an example of a waste treatment facility utilizing the present invention.
２ 廃棄物溶融炉 ３ 再燃焼室 ６ 排ガス処理装置 ７ ＣＯ2 吸収装置 ９ 煙突 10 被処理物 11 燃焼室 13 被処理物供給路 14 燃焼ガス 15 溶融物 16 排出孔 17 酸素発生装置 21 純酸素 24 排ガス2 Waste Melting Furnace 3 Reburning Chamber 6 Exhaust Gas Treatment Device 7 CO 2 Absorption Device 9 Chimney 10 Workpiece 11 Combustion Chamber 13 Workpiece Supply Channel 14 Combustion Gas 15 Melt 16 Discharge Hole 17 Oxygen Generator 21 Pure Oxygen 24 Exhaust gas
Claims (1)
し、前記燃焼室の底部中央に燃焼ガス及び溶融物兼用の
排出孔を形成してなる廃棄物溶融炉において、前記燃焼
室内に純酸素を供給しながら燃焼室内で被処理物を燃焼
かつ溶融させ、前記排出孔から燃焼ガス及び溶融物を炉
外に排出した後燃焼ガスを再燃焼させ、再燃焼した排ガ
スから水分を除去した後ＣＯ2 を回収し、然る後に排ガ
スの一部を前記燃焼室内に循環させて炉温を制御すると
ともに、排ガスの残部を大気中に放出することを特徴と
する廃棄物燃焼排ガス中のＣＯ2 回収方法。Claim: What is claimed is: 1. A waste melting method, comprising: connecting an object supply passage to the entire circumference of a combustion chamber; and forming a discharge hole for a combustion gas and a melt in the center of the bottom of the combustion chamber. In the furnace, the material to be treated is burned and melted in the combustion chamber while supplying pure oxygen into the combustion chamber, and the combustion gas and the molten material are discharged from the discharge hole to the outside of the furnace, and then the combustion gas is reburned and reburned. CO 2 is recovered after removing water from the exhaust gas, and after that, a part of the exhaust gas is circulated in the combustion chamber to control the furnace temperature and the rest of the exhaust gas is discharged into the atmosphere. CO 2 recovery method in waste combustion exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3181423A JPH0526428A (en) | 1991-07-23 | 1991-07-23 | Collecting process for co2 in exhaust gas produced by combustion of waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3181423A JPH0526428A (en) | 1991-07-23 | 1991-07-23 | Collecting process for co2 in exhaust gas produced by combustion of waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0526428A true JPH0526428A (en) | 1993-02-02 |
Family
ID=16100518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3181423A Pending JPH0526428A (en) | 1991-07-23 | 1991-07-23 | Collecting process for co2 in exhaust gas produced by combustion of waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526428A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007061107A1 (en) * | 2005-11-28 | 2007-05-31 | Electric Power Development Co., Ltd. | Disposal method and equipmnt for exhaust gas from combustion system |
| WO2023112862A1 (en) * | 2021-12-14 | 2023-06-22 | 日立造船株式会社 | Waste incineration facility |
| WO2023112863A1 (en) * | 2021-12-14 | 2023-06-22 | 日立造船株式会社 | Waste material incineration facility |
-
1991
- 1991-07-23 JP JP3181423A patent/JPH0526428A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007061107A1 (en) * | 2005-11-28 | 2007-05-31 | Electric Power Development Co., Ltd. | Disposal method and equipmnt for exhaust gas from combustion system |
| JP2007147161A (en) * | 2005-11-28 | 2007-06-14 | Electric Power Dev Co Ltd | Exhaust gas disposal method and device for combustion apparatus |
| AU2006316952B2 (en) * | 2005-11-28 | 2010-11-25 | Electric Power Development Co., Ltd. | Disposal method and equipment for exhaust gas from combustion system |
| WO2023112862A1 (en) * | 2021-12-14 | 2023-06-22 | 日立造船株式会社 | Waste incineration facility |
| WO2023112863A1 (en) * | 2021-12-14 | 2023-06-22 | 日立造船株式会社 | Waste material incineration facility |
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