JPH0731845A - Cooling method of leaking ammonia recovering apparatus - Google Patents
Cooling method of leaking ammonia recovering apparatusInfo
- Publication number
- JPH0731845A JPH0731845A JP5156434A JP15643493A JPH0731845A JP H0731845 A JPH0731845 A JP H0731845A JP 5156434 A JP5156434 A JP 5156434A JP 15643493 A JP15643493 A JP 15643493A JP H0731845 A JPH0731845 A JP H0731845A
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- air
- gas
- recovery device
- 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.)
- Granted
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 256
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 128
- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 82
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000011084 recovery Methods 0.000 claims description 81
- 238000002347 injection Methods 0.000 abstract description 20
- 239000007924 injection Substances 0.000 abstract description 20
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000003795 desorption Methods 0.000 description 10
- 239000000112 cooling gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は窒素酸化物含有排ガス発
生源からの排ガスをアンモニア還元脱硝装置で脱硝し、
該装置からリークするアンモニアをアンモニア回収装置
で回収するようにした系において、アンモニア回収装置
を高温ガスで再生してアンモニアを脱着させた後のアン
モニア回収装置を、アンモニアを回収するために低温に
冷却する方法に関する。BACKGROUND OF THE INVENTION The present invention denitrates exhaust gas from a nitrogen oxide-containing exhaust gas source with an ammonia reduction denitration device,
In a system in which the ammonia leaking from the device is recovered by the ammonia recovery device, the ammonia recovery device after the ammonia recovery device is regenerated with a high temperature gas to desorb the ammonia is cooled to a low temperature in order to recover the ammonia. On how to do.
【０００２】[0002]
【従来の技術】図４には従来技術の一例として、ボイラ
の風煙道系統図を示す。図４において、ボイラの燃焼用
空気は押込通風機１によって空気予熱器２を経由してボ
イラ３に投入される。ボイラ３で燃料の燃焼によって発
生した窒素酸化物を含むボイラ排ガスは乾式脱硝装置４
で脱硝され、未反応のリークアンモニアとともに空気予
熱器２で燃焼用空気によって熱回収される。リークアン
モニアはアンモニア回収装置５で同装置に回収され、窒
素酸化物およびリークアンモニアが除去された排ガスが
煙突６から大気へ放出される。2. Description of the Related Art FIG. 4 shows a wind flue system diagram of a boiler as an example of a conventional technique. In FIG. 4, the combustion air of the boiler is introduced into the boiler 3 by the forced draft fan 1 via the air preheater 2. Boiler exhaust gas containing nitrogen oxides generated by combustion of fuel in the boiler 3 is a dry denitration device 4
Denitration is carried out, and heat is recovered by the combustion air in the air preheater 2 together with unreacted leaked ammonia. The leak ammonia is recovered by the ammonia recovery device 5 and the exhaust gas from which the nitrogen oxides and the leak ammonia have been removed is released from the chimney 6 to the atmosphere.
【０００３】図４のケースでは、２つのアンモニア回収
装置、すなわちアンモニア回収装置５とアンモニア回収
装置７が設置され、２つのアンモニア回収装置５、７は
切り替え運用されており、アンモニア回収装置５ではボ
イラ排ガスからリークアンモニアが回収されつつある一
方で、アンモニア回収装置７は高温ガス８によって昇温
されアンモニアが脱離されている。脱離されたアンモニ
アは再生アンモニア注入系統１０から煙道１１に投入さ
れ、アンモニア注入系統１２からのアンモニアと共に乾
式脱硝装置４での脱硝反応に使用される。アンモニアの
脱離を完了したアンモニア回収装置７へは同装置７の冷
却のために冷却用の低温の空気または低温のボイラ排ガ
ス９が投入され、同装置７を冷却した後、再生アンモニ
ア注入系統１０などを利用して系外へ排出される。In the case of FIG. 4, two ammonia recovery devices, that is, an ammonia recovery device 5 and an ammonia recovery device 7, are installed, and the two ammonia recovery devices 5 and 7 are switched and operated. While the leaked ammonia is being recovered from the exhaust gas, the ammonia recovery device 7 is heated by the high temperature gas 8 and the ammonia is desorbed. The desorbed ammonia is introduced into the flue 11 from the regenerated ammonia injection system 10 and used in the denitration reaction in the dry denitration device 4 together with the ammonia from the ammonia injection system 12. Cooling low-temperature air or low-temperature boiler exhaust gas 9 is supplied to the ammonia recovery device 7 that has completed the desorption of ammonia, and the cooling device 7 is cooled, and then the regenerated ammonia injection system 10 is used. Is discharged to the outside of the system.
【０００４】アンモニア回収装置７の昇温、アンモニア
の脱離、冷却が終了し、アンモニア回収装置５でリーク
アンモニアの回収が完了すると切り替え運用となり、ア
ンモニア回収装置７でリークアンモニアの回収が開始さ
れ、アンモニア回収装置５では昇温が開始される。以下
同様にして、アンモニア回収装置５と７で交互にアンモ
ニアの回収と昇温、アンモニアの脱離、冷却が繰り返し
行われる運用となる。When the temperature recovery, ammonia desorption and cooling of the ammonia recovery device 7 are completed and the recovery of the leaked ammonia is completed in the ammonia recovery device 5, the switching operation is started, and the ammonia recovery device 7 starts the recovery of the leaked ammonia. The temperature rise is started in the ammonia recovery device 5. In the same manner, the ammonia recovery devices 5 and 7 alternately perform the recovery and temperature increase of ammonia, the desorption of ammonia, and the repeated cooling.
【０００５】なお、風煙道内に設置されるダンパ１６、
１７、１８、１９、２０、２１、２２、２３は以上の運
用に呼応して、アンモニア回収装置５でリークアンモニ
アを回収し、アンモニア回収装置７では昇温、アンモニ
アの脱離が行われている場合にはダンパ１６、１８、２
０、２２が開いており、ダンパ１７、１９、２１、２３
は閉じている。The damper 16 installed in the wind duct,
In response to the above operation, 17, 18, 19, 20, 21, 21, 22 and 23 collect the leaked ammonia by the ammonia recovery device 5, and the ammonia recovery device 7 raises the temperature and desorbs ammonia. In some cases, dampers 16, 18, 2
0, 22 are open and dampers 17, 19, 21, 23
Is closed.
【０００６】アンモニア回収装置７の昇温、アンモニア
の脱離、冷却が終了し、アンモニア回収装置５でリーク
アンモニアの回収が完了するとダンパは上記と逆動作と
なり、ダンパ１６、１８、２０、２２が閉じダンパ１
７、１９、２１、２３が開いてアンモニア回収装置７で
リークアンモニアの回収が開始され、アンモニア回収装
置５では昇温が開始される。When the temperature recovery, ammonia desorption, and cooling of the ammonia recovery device 7 are completed and the recovery of the leaked ammonia is completed in the ammonia recovery device 5, the damper operates in reverse to the above operation, and the dampers 16, 18, 20, 22 are activated. Closed damper 1
7, 19, 21, and 23 are opened, the ammonia recovery device 7 starts the recovery of leaked ammonia, and the ammonia recovery device 5 starts the temperature rise.
【０００７】[0007]
【発明が解決しようとする課題】図４を例にとると、ア
ンモニアの脱離を完了したアンモニア回収装置７へ同装
置７の冷却のために投入した冷却用の低温の空気または
低温のボイラ排ガス９を、再生アンモニア注入系統１０
を利用して系外へ排出することによって次の問題が発生
する。すなわち、アンモニア回収装置５、７を設置しな
い場合（すなわちアンモニアの回収を行わない場合）に
比べて、アンモニア回収装置５、７を設置して冷却用の
低温空気または低温のボイラ排ガス９を再生アンモニア
注入系統１０を通じて系外へ排出する場合には、後者の
方が空気予熱器２を通過する空気量に対して、同じく空
気予熱器２を通過するガス量が多くなる。従って後者の
場合には低温の空気または低温のボイラ排ガス９がアン
モニア回収装置７の冷却に使われて昇温された場合に、
その空気またはガスの保有する熱量をアンモニア回収装
置５、７を設置しない場合に比べて回収しにくくなる。
具体的には、空気予熱器２を通過する空気量に対して同
じく空気予熱器２を通過するガス量が多くなることによ
り排ガス損失が多くなりボイラ効率が低下する。またア
ンモニア回収装置５、７を設置しない場合と同一サイズ
の空気予熱器を設置した場合、空気予熱器２出口の排ガ
ス温度が上昇することにより排ガス損失が多くなり、ボ
イラ効率が低下する。逆に、空気予熱器２出口の排ガス
温度が上昇しないようにするにはアンモニア回収装置
５、７を設置しない場合に比べて空気予熱器２のサイズ
を大きくする必要があり、設備費がアップする。また空
気予熱器２のサイズを大きくした場合でも空気予熱器２
を通過するガス量が多くなることによる排ガス損失の増
加は防止することが困難である。Taking FIG. 4 as an example, low-temperature air for cooling or low-temperature boiler exhaust gas that is input to the ammonia recovery device 7 that has completed desorption of ammonia for cooling the device 7 is used. 9, regenerated ammonia injection system 10
The following problems are caused by discharging to the outside of the system by using. That is, compared with the case where the ammonia recovery devices 5 and 7 are not installed (that is, the case where ammonia is not recovered), the low temperature air for cooling or the low temperature boiler exhaust gas 9 is regenerated by installing the ammonia recovery devices 5 and 7. When the air is discharged to the outside of the system through the injection system 10, the latter has a larger amount of gas passing through the air preheater 2 than the amount of air passing through the air preheater 2. Therefore, in the latter case, when the low temperature air or the low temperature boiler exhaust gas 9 is used for cooling the ammonia recovery device 7 and the temperature is raised,
It becomes more difficult to recover the heat quantity of the air or gas than when the ammonia recovery devices 5 and 7 are not installed.
Specifically, as the amount of gas passing through the air preheater 2 increases with respect to the amount of air passing through the air preheater 2, exhaust gas loss increases and boiler efficiency decreases. Further, when an air preheater of the same size as that when the ammonia recovery devices 5 and 7 are not installed is installed, the exhaust gas temperature at the outlet of the air preheater 2 rises, the exhaust gas loss increases, and the boiler efficiency decreases. On the contrary, in order to prevent the exhaust gas temperature at the outlet of the air preheater 2 from rising, it is necessary to increase the size of the air preheater 2 as compared with the case where the ammonia recovery devices 5 and 7 are not installed, which increases the equipment cost. . Even if the size of the air preheater 2 is increased, the air preheater 2
It is difficult to prevent an increase in exhaust gas loss due to an increase in the amount of gas passing through.
【０００８】本発明は上記技術水準に鑑み、従来技術に
おけるような不具合のないアンモニア回収装置の冷却方
法を提供しようとするものである。In view of the above-mentioned state of the art, the present invention intends to provide a cooling method for an ammonia recovery device which does not have the problems of the prior art.
【０００９】[0009]
【課題を解決するための手段】本発明は窒素酸化物含有
ガス発生源、アンモニア還元脱硝装置、リークアンモニ
ア回収装置よりなる系のリークアンモニア回収装置を高
温ガスで離脱させた後、低温ガスで該回収装置を冷却す
るにあたって、低温ガスとして空気または低温のガスを
用い、該回収装置を冷却した後のこれらのガスを窒素酸
化物含有ガス発生源に投入することを特徴とするリーク
アンモニア回収装置の冷却方法である。According to the present invention, a system comprising a nitrogen oxide-containing gas generation source, an ammonia reduction denitration device, and a leak ammonia recovery device is used to remove a leak ammonia recovery device with a high temperature gas, and then with a low temperature gas. In cooling the recovery device, air or a low-temperature gas is used as a low-temperature gas, and these gases after cooling the recovery device are fed to a nitrogen oxide-containing gas generation source. It is a cooling method.
【００１０】本発明において、アンモニア回収装置の冷
却に用いる低温ガスとしては空気のほかアンモニア回収
装置と煙突との間の煙道から採取された低温排ガスが用
いられる。また、アンモニア回収装置を冷却した低温ガ
スは直接または予熱空気と共に窒素酸化物含有排ガス発
生源に投入してもよく、また窒素酸化物含有排ガス発生
源がボイラのような場合にはボイラの再循環ガス系統に
投入してもよい。In the present invention, as the low-temperature gas used for cooling the ammonia recovery device, not only air but also low-temperature exhaust gas collected from the flue between the ammonia recovery device and the chimney is used. In addition, the low-temperature gas that has cooled the ammonia recovery device may be fed directly or together with preheated air to the nitrogen oxide-containing exhaust gas generation source, and when the nitrogen oxide-containing exhaust gas generation source is a boiler, recirculation of the boiler is performed. It may be fed into a gas system.
【００１１】[0011]
【作用】アンモニア脱離後のアンモニア回収装置を冷却
した低温ガスを再生アンモニア注入系統を通じて系外へ
排出することなく窒素酸化物含有排ガス源の燃焼用ガス
として利用することにより、空気予熱器を通過する空気
量に対するガス量をアンモニア回収装置を設置しない場
合に比べて同等とすることができる。また空気予熱器の
出口排ガス温度をアンモニア回収装置を設置しない場合
に比べて同等とすることができる。[Operation] By passing the low-temperature gas, which has cooled the ammonia recovery device after desorption of ammonia, as the combustion gas for the exhaust gas source containing nitrogen oxides without discharging it through the regeneration ammonia injection system, it passes through the air preheater. The amount of gas with respect to the amount of air used can be made equal to that in the case where no ammonia recovery device is installed. Further, the temperature of the exhaust gas from the outlet of the air preheater can be made equal to that in the case where the ammonia recovery device is not installed.
【００１２】[0012]
【実施例】図１は本発明の一実施例としてのボイラの風
煙道系統図を示し、図１はアンモニア回収装置の冷却用
ガスとして低温の空気を使用した場合であり、これを空
気予熱器の出口の主風道に投入する場合である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a wind flue system diagram of a boiler as one embodiment of the present invention. FIG. 1 shows a case where low temperature air is used as a cooling gas for an ammonia recovery device, which is preheated with air. This is the case when it is put into the main wind passage at the exit of the vessel.
【００１３】図１において、押込通風機１、空気予熱器
２、ボイラ３、乾式脱硝装置４、アンモニア回収装置５
および７、煙突６、高温ガス８、低温の空気（冷却用ガ
ス）９、再生アンモニア注入系統１０、煙道１１、アン
モニア注入系統１２の作用および機能は図４に示した従
来技術と同様である。In FIG. 1, a forced draft fan 1, an air preheater 2, a boiler 3, a dry denitration device 4, and an ammonia recovery device 5 are shown.
And 7, the chimney 6, the high-temperature gas 8, the low-temperature air (cooling gas) 9, the regenerated ammonia injection system 10, the flue 11, and the ammonia injection system 12 have the same functions and functions as those of the prior art shown in FIG. .
【００１４】アンモニア回収装置７を昇温し同装置７か
らアンモニアを脱離している際には、アンモニア回収装
置７に投入される高温ガス８は脱離したアンモニアとの
混合ガスとなってアンモニア注入系統１０を経て煙道１
１に投入され、アンモニア注入系統１２からのアンモニ
アと共に乾式脱硝装置４で脱硝反応に使用される。アン
モニアの脱離が完了したアンモニア回収装置７を冷却す
るために高温ガス８の代わりに低温の空気９が同装置７
に投入されるが、同装置７を冷却することにより逆に昇
温される低温の空気９は再生アンモニア注入系統１０で
はなく、冷却空気回収系統１３を通じてボイラ３の燃焼
用空気として主風道１４に投入される。従って低温の空
気９は煙道１１に直接的に投入されることなく、空気予
熱器２を通過する空気量に対する排ガス量の増加は起こ
りえない。再生アンモニア注入系統１０と冷却空気回収
系統１３は再生アンモニア注入系統１０がアンモニア回
収装置５および７の昇温・アンモニア脱離時に使用さ
れ、冷却空気回収系統１３はアンモニア回収装置５およ
び７の冷却時に使用されるという切り替え運用となる。
以上、冷却用ガスとして空気を用いた場合について説明
したが、アンモニア回収装置５、７と煙突６の間の煙道
の低温の排ガスを用いても同様な効果を奏し得る。When the temperature of the ammonia recovery device 7 is raised and the ammonia is desorbed from the device 7, the high temperature gas 8 introduced into the ammonia recovery device 7 becomes a mixed gas with the desorbed ammonia and is injected with ammonia. Flue 1 through system 10
1 and is used for the denitration reaction in the dry denitration device 4 together with the ammonia from the ammonia injection system 12. In order to cool the ammonia recovery device 7 that has completed the desorption of ammonia, low-temperature air 9 is used instead of the high-temperature gas 8 in the device 7.
The low temperature air 9 which is charged to the main air passage 14 is heated not by the regenerated ammonia injection system 10 but by the cooling air recovery system 13 as the combustion air for the boiler 3. Be thrown into. Therefore, the low-temperature air 9 is not directly introduced into the flue 11, and the amount of exhaust gas with respect to the amount of air passing through the air preheater 2 cannot increase. The regenerated ammonia injection system 10 and the cooling air recovery system 13 are used when the regenerated ammonia injection system 10 is heated and desorbed ammonia from the ammonia recovery devices 5 and 7, and the cooling air recovery system 13 is used during cooling of the ammonia recovery devices 5 and 7. It is a switching operation that is used.
Although the case where air is used as the cooling gas has been described above, the same effect can be obtained even when low-temperature exhaust gas in the flue between the ammonia recovery devices 5 and 7 and the chimney 6 is used.
【００１５】図２は本発明の他の一実施例としてのボイ
ラの風煙道系統図を示し、図２はアンモニア回収装置の
冷却用ガスとして、低温のボイラ排ガスを使用した場合
であり、これをボイラの再循環ガス系統に投入する場合
である。FIG. 2 shows a wind flue system diagram of a boiler as another embodiment of the present invention. FIG. 2 shows a case where low temperature boiler exhaust gas is used as a cooling gas for an ammonia recovery device. This is the case of charging the above into the recirculation gas system of the boiler.
【００１６】図２において、押込通風機１、空気予熱器
２、ボイラ３、乾式脱硝装置４、アンモニア回収装置５
および７、煙突６、高温ガス８、低温のボイラ排ガス
（冷却用ガス）９、再生アンモニア注入系統１０、煙道
１１、アンモニア注入系統１２の作用および機能は図４
に示した従来技術と同様である。In FIG. 2, a forced draft fan 1, an air preheater 2, a boiler 3, a dry denitration device 4, and an ammonia recovery device 5 are shown.
And 7, the chimney 6, the high-temperature gas 8, the low-temperature boiler exhaust gas (cooling gas) 9, the regenerated ammonia injection system 10, the flue 11, and the ammonia injection system 12 have the functions and functions shown in FIG.
This is similar to the prior art shown in FIG.
【００１７】アンモニア回収装置７を昇温し同装置７か
らアンモニアを脱離している際には、図１の例と同様に
再生アンモニア注入系統１０が使用されるが、アンモニ
アの脱離が完了したアンモニア回収装置７を冷却する際
には低温のボイラ排ガス９は冷却ガス回収系統１３を通
じてボイラの再循環ガス系統１４に投入される。従って
図１の例と同様排ガス９は煙道１１に直接的に投入され
ることなく、空気予熱器２を通過する空気量に対する排
ガス量の増加は起こりえない。再生アンモニア注入系統
１０と冷却ガス回収系統１３は再生アンモニア注入系統
１０がアンモニア回収装置５および７の昇温・アンモニ
ア脱離時に使用され、冷却ガス回収系統１３はアンモニ
ア回収装置５および７の冷却時に使用されるという切り
替え運用となる。なお、図２中、１５はガス再循環ファ
ンである。While the ammonia recovery device 7 is heated to desorb ammonia from the device 7, the regenerated ammonia injection system 10 is used as in the example of FIG. 1, but the desorption of ammonia is completed. When cooling the ammonia recovery device 7, the low-temperature boiler exhaust gas 9 is introduced into the recycle gas system 14 of the boiler through the cooling gas recovery system 13. Therefore, as in the example of FIG. 1, the exhaust gas 9 is not directly injected into the flue 11, and the amount of exhaust gas with respect to the amount of air passing through the air preheater 2 cannot increase. The regenerated ammonia injection system 10 and the cooling gas recovery system 13 are used when the regenerated ammonia injection system 10 is used when the ammonia recovery devices 5 and 7 are heated and desorbed, and the cooling gas recovery system 13 is used when the ammonia recovery devices 5 and 7 are cooled. It is a switching operation that is used. In FIG. 2, numeral 15 is a gas recirculation fan.
【００１８】図３は図２の改変例である。図３の例では
冷却に使用した排ガス９が図２中のガス再循環ファン１
５を有する再循環ガス系統１４に投入されるのではな
く、直接ボイラ３の火炉上部へ投入される例である。FIG. 3 is a modification of FIG. In the example of FIG. 3, the exhaust gas 9 used for cooling is the gas recirculation fan 1 in FIG.
5 is an example in which the gas is not directly fed to the recirculation gas system 14 having the No. 5 but is directly fed to the upper part of the furnace of the boiler 3.
【００１９】[0019]
【発明の効果】アンモニア脱離後のアンモニア回収装置
を冷却する空気を、再生アンモニア注入系統を通じて系
外へ排出することなく窒素酸化物含有ガス発生源、例え
ばボイラの燃焼用空気として利用することにより、空気
予熱器を通過する空気量に対するガス量をアンモニア回
収装置を設置しない場合に比べて同等とすることができ
る。また空気予熱器の出口排ガス温度をアンモニア回収
装置を設置しない場合に比べて同等とすることができ
る。従ってボイラもしくは窒素酸化物含有排ガス発生源
の排ガス損失を従来のアンモニア回収装置冷却方法に比
べて低減できる。また、アンモニア回収装置の冷却空気
を燃焼用空気として利用できる分、押込通風機で供給す
る空気量を低減でき、従来のアンモニア回収装置冷却方
法に比べて押込通風機の消費動力を低減できる。EFFECTS OF THE INVENTION By using the air for cooling the ammonia recovery device after desorption of ammonia as a nitrogen oxide-containing gas generation source, for example, combustion air for a boiler, without discharging it through the regenerated ammonia injection system to the outside of the system. The amount of gas with respect to the amount of air passing through the air preheater can be made equal to that in the case where no ammonia recovery device is installed. Further, the temperature of the exhaust gas from the outlet of the air preheater can be made equal to that in the case where the ammonia recovery device is not installed. Therefore, the exhaust gas loss of the boiler or the nitrogen oxide-containing exhaust gas generation source can be reduced as compared with the conventional cooling method of the ammonia recovery device. Further, since the cooling air of the ammonia recovery device can be used as combustion air, the amount of air supplied by the forced draft fan can be reduced, and the power consumption of the forced draft fan can be reduced as compared with the conventional cooling method of the ammonia recovery device.
【００２０】アンモニア脱離後のアンモニア回収装置を
冷却するボイラもしくは窒素酸化物含有排ガス発生源か
らの低温の排ガスをボイラの再循環ガスとして投入する
か、もしくはボイラの燃焼用空気に混入することによっ
て、空気予熱器を通過する空気量に対するガス量をアン
モニア回収装置を設置しない場合に比べて同等とするこ
とができる。また、空気予熱器の出口排ガス温度をアン
モニア回収装置を設置しない場合に比べて同等とするこ
とができる。従ってボイラもしくは窒素酸化物含有排ガ
ス発生源の排ガス損失を従来のアンモニア回収装置冷却
方法に比べて低減できる。By supplying low-temperature exhaust gas from a boiler or a nitrogen oxide-containing exhaust gas generation source that cools the ammonia recovery device after desorption of ammonia, as recirculation gas of the boiler, or by mixing it with combustion air of the boiler. The amount of gas with respect to the amount of air passing through the air preheater can be made equal to that in the case where no ammonia recovery device is installed. Further, the temperature of the exhaust gas from the outlet of the air preheater can be made equal to that in the case where the ammonia recovery device is not installed. Therefore, the exhaust gas loss of the boiler or the nitrogen oxide-containing exhaust gas generation source can be reduced as compared with the conventional cooling method of the ammonia recovery device.
【図１】本発明の一実施例のボイラの風煙道系統図。FIG. 1 is a wind flue system diagram of a boiler according to an embodiment of the present invention.
【図２】本発明の他の実施例のボイラの風煙道系統図。FIG. 2 is a wind flue system diagram of a boiler according to another embodiment of the present invention.
【図３】本発明のさらに他の実施例のボイラの風煙道系
統図。FIG. 3 is a wind flue system diagram of a boiler according to still another embodiment of the present invention.
【図４】従来のアンモニア回収装置を有するボイラの風
煙道系統図。FIG. 4 is a wind flue system diagram of a boiler having a conventional ammonia recovery device.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｊ 15/00 Ｂ０１Ｄ 53/34 １２９ Ｂ 7704−3Ｋ Ｆ２３Ｊ 15/00 Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location F23J 15/00 B01D 53/34 129 B 7704-3K F23J 15/00 A
Claims (1)
還元脱硝装置、リークアンモニア回収装置よりなる系の
リークアンモニア回収装置を高温ガスで離脱させた後、
低温ガスで該回収装置を冷却するにあたって、低温ガス
として空気または低温のガスを用い、該回収装置を冷却
した後のこれらのガスを窒素酸化物含有ガス発生源に投
入することを特徴とするリークアンモニア回収装置の冷
却方法。1. A system comprising a nitrogen oxide-containing gas generation source, an ammonia reduction denitration device, and a leak ammonia recovery device is desorbed with a high temperature gas, and thereafter,
When cooling the recovery device with a low temperature gas, air or a low temperature gas is used as the low temperature gas, and these gases after cooling the recovery device are fed to a nitrogen oxide-containing gas generation source. Cooling method for ammonia recovery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15643493A JP3388813B2 (en) | 1993-06-28 | 1993-06-28 | Cooling method for leak ammonia recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15643493A JP3388813B2 (en) | 1993-06-28 | 1993-06-28 | Cooling method for leak ammonia recovery equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0731845A true JPH0731845A (en) | 1995-02-03 |
| JP3388813B2 JP3388813B2 (en) | 2003-03-24 |
Family
ID=15627671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15643493A Expired - Fee Related JP3388813B2 (en) | 1993-06-28 | 1993-06-28 | Cooling method for leak ammonia recovery equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3388813B2 (en) |
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| CN103007751A (en) * | 2012-12-21 | 2013-04-03 | 江苏科行环境工程技术有限公司 | Process system utilizing preheated air to achieve flue gas denitration |
| CN103307623A (en) * | 2013-05-20 | 2013-09-18 | 中国科学院过程工程研究所 | Branch control phase-change heat exchange system and method of cooperative control |
| CN103657405A (en) * | 2012-09-21 | 2014-03-26 | 上海阳高新能源科技有限公司 | Intelligent low-temperature denitration system |
| CN105169917A (en) * | 2015-09-26 | 2015-12-23 | 国网河南省电力公司电力科学研究院 | SNCR-SCR combined denitration system and method based on ammonia nitrogen molar ratio detection and regulation |
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|---|---|---|---|---|
| CN105268315A (en) * | 2015-10-09 | 2016-01-27 | 浙江浩普环保工程有限公司 | Flue gas pollutant ultra-low emission system |
| CN106166455B (en) * | 2016-08-10 | 2020-01-07 | 大唐环境产业集团股份有限公司 | Denitration ammonia pretreatment systems |
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1993
- 1993-06-28 JP JP15643493A patent/JP3388813B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657405A (en) * | 2012-09-21 | 2014-03-26 | 上海阳高新能源科技有限公司 | Intelligent low-temperature denitration system |
| CN103007751A (en) * | 2012-12-21 | 2013-04-03 | 江苏科行环境工程技术有限公司 | Process system utilizing preheated air to achieve flue gas denitration |
| CN103307623A (en) * | 2013-05-20 | 2013-09-18 | 中国科学院过程工程研究所 | Branch control phase-change heat exchange system and method of cooperative control |
| CN103307623B (en) * | 2013-05-20 | 2015-09-30 | 中国科学院过程工程研究所 | A kind of sub-control phase-change heat exchange system of Collaborative Control and heat-exchange method |
| CN105169917A (en) * | 2015-09-26 | 2015-12-23 | 国网河南省电力公司电力科学研究院 | SNCR-SCR combined denitration system and method based on ammonia nitrogen molar ratio detection and regulation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3388813B2 (en) | 2003-03-24 |
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