JPH09155154A - Liquid supply device for denitration in incinerator - Google Patents
Liquid supply device for denitration in incineratorInfo
- Publication number
- JPH09155154A JPH09155154A JP7320929A JP32092995A JPH09155154A JP H09155154 A JPH09155154 A JP H09155154A JP 7320929 A JP7320929 A JP 7320929A JP 32092995 A JP32092995 A JP 32092995A JP H09155154 A JPH09155154 A JP H09155154A
- Authority
- JP
- Japan
- Prior art keywords
- incinerator
- denitration
- water
- spray nozzle
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 22
- 239000007921 spray Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 description 14
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 14
- 239000000428 dust Substances 0.000 description 9
- 238000007865 diluting Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
(57)【要約】
【課題】 噴霧ノズルを、常に、保護し得る焼却炉にお
ける脱硝用液体供給装置を提供することを目的とする。
【解決手段】 焼却炉１から排出された排ガスを煙突３
に導く排ガス管路４の途中に設けられたＮＯX 検出器５
と、焼却炉１内に配置されて脱硝剤および水が混合され
てなる脱硝用液体を噴霧する噴霧ノズル６と、この噴霧
ノズル６に脱硝剤および水を供給する脱硝剤供給管16お
よび水供給管13とから構成するとともに、ＮＯX 検出器
５からの検出値により、脱硝剤供給管16途中に介装され
たポンプ15を制御するようにしたものである。
(57) Abstract: It is an object of the present invention to provide a denitration liquid supply device for an incinerator that can always protect a spray nozzle. SOLUTION: Exhaust gas discharged from an incinerator 1 is transferred to a chimney 3
NO X detector 5 provided in the middle of the exhaust gas conduit 4 leading to
And a spray nozzle 6 which is placed in the incinerator 1 and sprays a denitration liquid formed by mixing a denitration agent and water, a denitration agent supply pipe 16 for supplying the denitration agent and water to the spray nozzle 6, and a water supply It is configured by a pipe 13, and the pump 15 inserted in the middle of the denitration agent supply pipe 16 is controlled by the detection value from the NO X detector 5.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、焼却炉における脱
硝用液体供給装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denitration liquid supply device for an incinerator.
【０００２】[0002]
【従来の技術】通常、焼却設備においては、図２に示す
ように、焼却炉５１から排出される排ガスは、排ガス管
路５２の途中に設けられた集塵装置５３により飛灰など
の塵埃が除去された後、煙突５４から大気に放出されて
いる。2. Description of the Related Art Generally, in an incinerator, as shown in FIG. 2, exhaust gas discharged from an incinerator 51 is collected by a dust collector 53 provided midway in an exhaust gas pipe 52 so that dust such as fly ash is generated. After being removed, it is released from the chimney 54 to the atmosphere.
【０００３】一般に、焼却炉５１から出た排ガス中には
ＮＯX が含まれており、環境汚染防止のために、集塵装
置５３を出た排ガス中に含まれているＮＯX 量がＮＯX
検出器５５で検出され、そしてこの検出値に応じて、Ｎ
ＯX 量を減少させる方向で、脱硝用液体として、水で希
釈された尿素水が、噴霧ノズル５６から焼却炉５１内に
噴霧されていた。[0003] In general, the flue gas exiting from the incinerator 51 includes a NO X, in order to prevent environmental pollution, NO X amount contained in the exhaust gas exiting the dust collector 53 is NO X
N is detected by the detector 55 and, depending on the detected value, N
In the direction of reducing the O X amount, as denitrification liquid, urea water is diluted with water, it was sprayed from the spray nozzle 56 into the incinerator 51.
【０００４】従来、この尿素水を排ガス中に噴霧供給す
る脱硝用液体供給装置は、タンクローリなどにより運ば
れてきた尿素水を貯溜する貯槽５７と、この貯槽５７か
ら尿素水および水を受け入れて尿素水を所定の濃度に希
釈する希釈槽５８と、この希釈槽５８で希釈された所定
濃度の尿素水（脱硝用液体）を噴霧ノズル５６に供給す
る尿素水供給配管５９と、この尿素水供給配管５９の途
中に介装されたポンプ６０とから構成され、またこのポ
ンプ６０は、ＮＯX 検出器５５からのＮＯX の検出値に
応じて制御器６１により制御されている。Conventionally, a denitration liquid supply device for spraying urea water into exhaust gas has a storage tank 57 for storing the urea water carried by a tank truck or the like, and a urea water and water from the storage tank 57 for receiving the urea water and urea. A diluting tank 58 for diluting water to a predetermined concentration, a urea water supply pipe 59 for supplying the urea water (denitration liquid) having a predetermined concentration diluted in the diluting tank 58 to the spray nozzle 56, and this urea water supply pipe. 59 consists interposed a pump 60. in the middle of, and the pump 60 is controlled by the controller 61 in accordance with the detection value of the NO X from the NO X detector 55.
【０００５】すなわち、ＮＯX の検出値が所定値よりも
多い場合には、ポンプ６０を駆動して、尿素水を噴霧ノ
ズル５６から焼却炉５１内に噴霧し、またＮＯX の検出
値が所定値よりも少ない場合には、ポンプ６０が停止さ
れ、噴霧ノズル５６は自動的に引き出されていた。That is, when the detected value of NO X is greater than the predetermined value, the pump 60 is driven to spray the urea water from the spray nozzle 56 into the incinerator 51, and the detected value of NO X is predetermined. If it is less than the value, the pump 60 is stopped and the spray nozzle 56 is automatically withdrawn.
【０００６】[0006]
【発明が解決しようとする課題】ところで、上記噴霧ノ
ズル５６は焼却炉５１内に配置されており、高温ガスに
曝されているため、冷却を必要とするが、ＮＯX の検出
値が所定値に近づくにつれて、ポンプ６０の吐出量が徐
々に下がり、したがって噴霧ノズル５６の冷却が悪化す
るとともに、塵埃が付着してノズル孔が閉塞してしま
い、噴霧ノズルを保護することができないという問題が
あった。By the way, since the spray nozzle 56 is arranged in the incinerator 51 and is exposed to high temperature gas, it requires cooling, but the detected value of NO X is a predetermined value. As the discharge amount of the pump 60 gradually decreases, the cooling of the spray nozzle 56 deteriorates, and dust adheres to block the nozzle hole, which prevents the spray nozzle from being protected. It was
【０００７】そこで、本発明は、噴霧ノズルを、常に、
保護し得る焼却炉における脱硝用液体供給装置を提供す
ることを目的とする。Therefore, in the present invention, the spray nozzle is always
An object of the present invention is to provide a denitration liquid supply device for an incinerator that can be protected.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するた
め、本発明の焼却炉における脱硝用液体供給装置は、焼
却炉から排出された排ガスを煙突に導く排ガス管路の途
中に設けられたＮＯX 検出器と、上記焼却炉内に配置さ
れて脱硝剤および水が混合されてなる脱硝用液体を噴霧
する噴霧ノズルと、この噴霧ノズルに脱硝剤および水を
供給する脱硝剤供給管および水供給管とから構成すると
ともに、上記ＮＯX 検出器からの検出値により、上記脱
硝剤供給管途中に介装されたポンプを制御するようにし
たものである。In order to solve the above problems, a denitration liquid supply device for an incinerator according to the present invention has a NO provided in the middle of an exhaust gas pipe that guides the exhaust gas discharged from the incinerator to a chimney. X detector, spray nozzle which is placed in the incinerator and sprays a denitration liquid formed by mixing denitration agent and water, denitration agent supply pipe and water supply which supplies denitration agent and water to the spray nozzle It is configured by a pipe, and the pump interposed in the middle of the denitration agent supply pipe is controlled by the detection value from the NO x detector.
【０００９】上記の構成によると、噴霧ノズルに、水お
よび脱硝剤を供給するための供給管をそれぞれ別個に設
けたので、例えば脱硝剤の供給が徐々に減った場合で
も、水についてはいつでも供給することができ、したが
って高温の焼却炉内に設けられた噴霧ノズルを冷却し得
るとともに、塵埃によるノズル孔の閉塞を防止すること
ができる。According to the above construction, since the spray nozzles are provided with the supply pipes for supplying water and the denitration agent separately, for example, even when the supply of the denitration agent is gradually reduced, the water is always supplied. Therefore, the spray nozzle provided in the high temperature incinerator can be cooled, and the nozzle hole can be prevented from being blocked by dust.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態におけ
る脱硝用液体供給装置を図１に基づき説明する。BEST MODE FOR CARRYING OUT THE INVENTION A denitration liquid supply apparatus according to an embodiment of the present invention will be described below with reference to FIG.
【００１１】図１において、１はごみ焼却炉で、この焼
却炉１には、途中に集塵装置２が設けられて焼却炉１内
の排ガスを煙突３に導くための排ガス管路４が接続され
ている。そして、この排ガス管路４の集塵装置２の下流
側の途中には、ＮＯX 量を検出するＮＯX 検出器５が設
けられている。In FIG. 1, reference numeral 1 is a refuse incinerator, which is provided with a dust collector 2 on the way to which an exhaust gas pipe 4 for guiding exhaust gas in the incinerator 1 to a chimney 3 is connected. Has been done. And this in the middle of the downstream side of the dust collector 2 of the exhaust gas conduit 4, NO X detector 5 for detecting the amount of NO X is provided.
【００１２】そして、この焼却炉１内には、排ガス管路
４内のＮＯX 量を抑制するために、尿素水、アンモニア
などの脱硝剤と水とを混合した脱硝用液体を噴霧するた
めの噴霧ノズル６が設けられ、またこの噴霧ノズル６に
は、脱硝用液体を供給するための脱硝用液体供給配管７
が接続されている。Then, in order to suppress the amount of NO x in the exhaust gas pipe 4, a denitration liquid, in which a denitration agent such as urea water or ammonia is mixed with water, is sprayed into the incinerator 1. A spray nozzle 6 is provided, and the spray nozzle 6 is provided with a denitration liquid supply pipe 7 for supplying a denitration liquid.
Is connected.
【００１３】この脱硝用液体供給配管７は、水タンク１
１内の水をポンプ１２を介して供給する水供給管１３
と、液体タンク１４内の脱硝剤をポンプ１５を介して上
記水供給管１３の途中に供給する脱硝剤供給管１６とか
ら構成され、また上記ポンプ１５は、ＮＯX 検出器５か
らの検出値に応じて、制御器１７により制御される。な
お、水供給管１３の脱硝剤供給管１６との接続箇所より
下流側には、水と脱硝剤とを混合するためのラインミキ
サー１８が配置されている。The denitration liquid supply pipe 7 is a water tank 1.
Water supply pipe 13 for supplying water in 1 via a pump 12
And a denitration agent supply pipe 16 for supplying the denitration agent in the liquid tank 14 via the pump 15 to the middle of the water supply pipe 13, and the pump 15 detects the value detected by the NO x detector 5. Is controlled by the controller 17. A line mixer 18 for mixing water and the denitration agent is arranged downstream of the connection point of the water supply pipe 13 with the denitration agent supply pipe 16.
【００１４】上記構成において、焼却炉１の稼働時に
は、両ポンプ１２，１５により、水と脱硝剤例えば尿素
水とがラインミキサー１８で混合されて、焼却炉１内の
噴霧ノズル６に供給される。これにより、燃焼室内にお
けるＮＯX が還元されて窒素ガスとなり、ＮＯX 量が低
減される。In the above construction, when the incinerator 1 is in operation, the water and the denitration agent such as urea water are mixed by the line pumps 18 by the pumps 12 and 15 and supplied to the spray nozzle 6 in the incinerator 1. . As a result, NO X in the combustion chamber is reduced to nitrogen gas, and the NO X amount is reduced.
【００１５】このとき、排ガス中のＮＯX 量が多い場合
には、ＮＯX 検出器５からの検出値が制御器１７に送ら
れ、尿素水の量を増加するようにポンプ１５が制御され
る。逆に、排ガス中のＮＯX 量が徐々に減ってくる場合
には、ポンプ１５の吐出量だけが徐々に減り、尿素水の
供給が徐々に減ってくる。At this time, when the amount of NO X in the exhaust gas is large, the detected value from the NO X detector 5 is sent to the controller 17, and the pump 15 is controlled so as to increase the amount of urea water. . On the contrary, when the NO X amount in the exhaust gas gradually decreases, only the discharge amount of the pump 15 gradually decreases, and the supply of urea water gradually decreases.
【００１６】この場合でも、水だけが噴霧ノズル６に定
量供給されることになる。すなわち、水は常に噴霧ノズ
ル６に供給されているため、噴霧ノズル６の冷却が行わ
れるととともに、塵埃によりノズル孔が閉塞するのが防
止され、さらに噴霧ノズル６に付着した脱硝剤などを洗
浄するため、耐食性の向上が図られる。また、水と脱硝
剤とを、混合希釈するための希釈槽（混合槽）を必要と
しない。Even in this case, only the water is supplied to the spray nozzle 6 in a fixed amount. That is, since water is always supplied to the spray nozzle 6, the spray nozzle 6 is cooled, and the nozzle holes are prevented from being blocked by dust, and the denitration agent and the like adhering to the spray nozzle 6 are washed. Therefore, the corrosion resistance is improved. Further, there is no need for a diluting tank (mixing tank) for mixing and diluting water and the denitration agent.
【００１７】なお、上記実施の形態においては、脱硝用
液体として、尿素水を説明したが、このものに限定され
るものではなく、例えばアンモニア水なども使用するこ
とができる。In the above embodiment, urea water was described as the denitration liquid, but the liquid is not limited to this, and ammonia water, for example, can also be used.
【００１８】[0018]
【発明の効果】以上のように本発明の構成によると、噴
霧ノズルに水および脱硝剤を供給するための供給管をそ
れぞれ別個に設けたので、例えば脱硝剤を供給する必要
がない場合でも、水についてはいつでも供給することが
でき、したがって高温の焼却炉内に設けられた噴霧ノズ
ルを冷却し得るとともに、塵埃によるノズル孔の閉塞を
防止することができ、さらには噴霧ノズルに付着した脱
硝剤などが洗浄されるため、耐食性の向上を図ることが
できる。As described above, according to the configuration of the present invention, since the supply pipes for supplying water and the denitration agent are separately provided to the spray nozzle, for example, even when it is not necessary to supply the denitration agent, Water can be supplied at any time, therefore the spray nozzle provided in the high temperature incinerator can be cooled, and the nozzle hole can be prevented from being clogged with dust. Furthermore, the denitration agent adhering to the spray nozzle can be prevented. Since the etc. are washed, the corrosion resistance can be improved.
【図１】本発明の実施の形態における脱硝用液体供給装
置の概略構成を示すブロック図である。FIG. 1 is a block diagram showing a schematic configuration of a denitration liquid supply device according to an embodiment of the present invention.
【図２】従来例における脱硝剤供給装置の概略構成を示
すブロック図である。FIG. 2 is a block diagram showing a schematic configuration of a denitration agent supply device in a conventional example.
１ 焼却炉 ４ 排ガス管路 ５ ＮＯX 検出器 ６ 噴霧ノズル １１ 水タンク １２ ポンプ １３ 水供給管 １４ 液体タンク １５ ポンプ １６ 脱硝剤供給管1 Incinerator 4 Exhaust Gas Pipe 5 NO X Detector 6 Spray Nozzle 11 Water Tank 12 Pump 13 Water Supply Pipe 14 Liquid Tank 15 Pump 16 Denitration Agent Supply Pipe
Claims (1)
排ガス管路の途中に設けられたＮＯ X 検出器と、上記焼
却炉内に配置されて脱硝剤および水が混合されてなる脱
硝用液体を噴霧する噴霧ノズルと、この噴霧ノズルに脱
硝剤および水を供給する脱硝剤供給管および水供給管と
から構成するとともに、上記ＮＯX 検出器からの検出値
により、上記脱硝剤供給管途中に介装されたポンプを制
御するようにしたことを特徴とする焼却炉における脱硝
用液体供給装置。1. The exhaust gas discharged from the incinerator is guided to the chimney.
NO provided in the middle of the exhaust gas pipeline X Detector and above burning
It is placed in the incinerator and mixed with denitration agent and water.
The spray nozzle that sprays the liquid for nitric acid, and the spray nozzle
Denitrifying agent supply pipe and water supply pipe for supplying nitrification agent and water
And the above NOX Detection value from the detector
Control the pump installed in the middle of the denitration agent supply pipe.
Denitration in an incinerator characterized by control
Liquid supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7320929A JP3059091B2 (en) | 1995-12-11 | 1995-12-11 | Liquid supply device for denitration in incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7320929A JP3059091B2 (en) | 1995-12-11 | 1995-12-11 | Liquid supply device for denitration in incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09155154A true JPH09155154A (en) | 1997-06-17 |
| JP3059091B2 JP3059091B2 (en) | 2000-07-04 |
Family
ID=18126863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7320929A Expired - Fee Related JP3059091B2 (en) | 1995-12-11 | 1995-12-11 | Liquid supply device for denitration in incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3059091B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI545158B (en) | 2015-06-18 | 2016-08-11 | 明基材料股份有限公司 | Material for contact lenses, contact lenses and method of forming the same |
-
1995
- 1995-12-11 JP JP7320929A patent/JP3059091B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3059091B2 (en) | 2000-07-04 |
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