JPH04110019A - Stack gas desulfurization device - Google Patents
Stack gas desulfurization deviceInfo
- Publication number
- JPH04110019A JPH04110019A JP2226748A JP22674890A JPH04110019A JP H04110019 A JPH04110019 A JP H04110019A JP 2226748 A JP2226748 A JP 2226748A JP 22674890 A JP22674890 A JP 22674890A JP H04110019 A JPH04110019 A JP H04110019A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- reaction tower
- desulfurization
- gas
- inner cylinder
- 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
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 67
- 230000023556 desulfurization Effects 0.000 title claims abstract description 67
- 239000007789 gas Substances 0.000 claims abstract description 77
- 238000006243 chemical reaction Methods 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 4
- 150000001339 alkali metal compounds Chemical class 0.000 claims description 3
- 150000001341 alkaline earth metal compounds Chemical class 0.000 claims description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract description 16
- 230000002378 acidificating effect Effects 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 4
- 239000002341 toxic gas Substances 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 10
- 239000000920 calcium hydroxide Substances 0.000 description 10
- 235000011116 calcium hydroxide Nutrition 0.000 description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 231100000676 disease causative agent Toxicity 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000004572 hydraulic lime Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明はアルカリ、またはアルカリ土類金属化合物のう
ち少なくとも一種類以上を脱硫剤として用いる脱硫装置
に係り、特に脱硫性能向上法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a desulfurization device using at least one kind of alkali or alkaline earth metal compound as a desulfurization agent, and particularly relates to a method for improving desulfurization performance. .
[従来の技術]
火力発電所における重油焚、石炭焚ボイラがら排出され
る排ガス中には、硫黄化合物(SOx)やHCfなどの
酸性有害物質が通常、100〜3000ppmの割合で
含まれており、酸性雨や光化学スモッグの原因物質とさ
れるため、その効果的な処理手段が7丈れている。従来
がら湿式法(f!Aえば石灰石−石膏法)または乾式法
(活性炭法)が実施されているが、湿式法は有害物質の
除去率が高い反面、廃水処理が困難で、排ガスを再加熱
する必要があり、設備費や運転費が高く、乾式法では高
い除去率が得られないという問題があった。[Prior Art] The exhaust gas emitted from heavy oil-fired and coal-fired boilers in thermal power plants usually contains acidic harmful substances such as sulfur compounds (SOx) and HCf at a rate of 100 to 3000 ppm. Since it is considered to be a causative agent of acid rain and photochemical smog, seven effective treatment methods have been developed. Conventionally, a wet method (e.g. limestone-gypsum method) or a dry method (activated carbon method) has been used, but while the wet method has a high removal rate of harmful substances, it is difficult to treat wastewater and requires reheating of exhaust gas. There was a problem that the equipment cost and operating cost were high, and a high removal rate could not be obtained with the dry method.
二のため、無排+の低コストアロセスて高い除去率か得
られる脱硫方法の開発力・望まれている。For two reasons, there is a strong desire to develop a desulfurization method that can achieve a high removal rate with an emission-free and low-cost alloprocess.
ボイラなとの排ガスの脱硫法としては、上記方法のほか
に、消石灰やそのスラリを排ガス中に噴霧する半乾式法
や火炉内あるいは煙道内の高温ガス中に石灰石を直接分
散させて酸性有害物質を除去する乾式法か提案されてお
り、設備費や運転費か安いという特徴を有しているか、
いずれの方法も除去率が低いという問題がある。In addition to the above methods, desulfurization methods for exhaust gas from boilers include a semi-dry method in which slaked lime or its slurry is sprayed into the exhaust gas, and a method in which limestone is directly dispersed in the hot gas in the furnace or flue to remove acidic harmful substances. Has a dry method been proposed to remove it, and is it characterized by low equipment and operating costs?
Both methods have the problem of low removal rates.
消石灰や生石灰を排ガス中に噴霧して排ガス中のS02
と反応させ、これを集塵装置て゛除去する方法の代表的
なフローシートを第5図に示す。ボイラ9からの排ガス
13はエアヒータ12で温度を下げられ、脱硫反応塔1
5に導かれる。消石灰などの脱硫剤は煙道または脱硫反
応塔内に噴霧して供給され、この時水も供給されること
により排ガスの温度を下げ、湿度を上げる。この除水は
脱硫剤と別に供給しても、脱硫剤をスラリとして同時に
供給してもよい。反応した脱硫剤は排ガス中の灰ととも
に集塵装置16で捕集され、廃棄される。二のような方
法において、酸性有害物質の除去率は俳ガス中の水分(
相N湿度)か支配的であるとされている。すなわち除去
率を上げるためには、排ガスの温度分下げ、水分を上げ
ることか必要である。水分濃度を上げるなめに、水や消
石灰スラリを噴霧する方法が提案されている。S02 in exhaust gas by spraying slaked lime or quicklime into exhaust gas
FIG. 5 shows a typical flow sheet of a method for reacting with oxidants and removing them using a dust collector. The temperature of the exhaust gas 13 from the boiler 9 is lowered by the air heater 12, and the exhaust gas 13 is sent to the desulfurization reaction tower 1.
5. A desulfurizing agent such as slaked lime is supplied by spraying into the flue or into the desulfurizing reaction tower, and water is also supplied at this time to lower the temperature of the exhaust gas and increase the humidity. This water removal may be supplied separately from the desulfurizing agent, or the desulfurizing agent may be supplied simultaneously as a slurry. The reacted desulfurizing agent is collected together with the ash in the exhaust gas by the dust collector 16 and discarded. In methods like 2, the removal rate of acidic harmful substances depends on the moisture in the gas (
Phase N (humidity) is said to be dominant. In other words, in order to increase the removal rate, it is necessary to lower the temperature of the exhaust gas and increase the moisture content. In order to increase the water concentration, a method of spraying water or slaked lime slurry has been proposed.
[発明か解決しようとする課題]
例疋ば、特開昭61 287421号記載のような装置
では水分濃度を高くするために長円形の脱硫反応塔の一
端に水を噴霧するようにしているか、100〜200°
Cの排ガスを50〜70°Cの水分飽和状態にするまて
には大量の水を噴霧する必要かある。大量の水を噴霧す
ると水か蒸発完了するまでの時間が長くなり、脱硫反応
に好適な高湿・低温領域を長くとるためには、塔高を高
くしなければならない。また、排ガスと脱硫剤の接触時
間をできるだけ長く取り、高い脱硫率を得ようとすれば
、塔高は必然的に高くなる。ただし、この点については
、特開昭61−287421号記載の装置のように脱硫
反応塔を中間部で0字型に折り曲げることにより、装置
M模か大型fヒすることに対処することばて′きる。し
かし、こめように脱硫反応塔を形成する長い脱硫反応管
をむき出しの状態て′使用すれば、大気に対する伝熱面
積か増大し熱損失が大きくなるなめ、反応管内のガス相
の温度を均一に維持することが難しくなり、反応管出口
側の管壁内面で水の凝縮が生じる。二のため、スケール
、酸露点の低下による腐食等のトラブルを招くことにな
る。才な、このトラブルを防ぐために保温材あるいはス
チームトし−ス等により熱損失を少なくしようとすれば
、装置が復路になり保守点検も非常に難しいものになる
。さらに、少数のスプレノズルで大量の水を噴霧しよう
とすると、−基のスプレノズル当りの水噴霧量が多くな
るなめ、二流体ノズルを使用したとしても液滴の微粒体
には限界があり、水の蒸発完了時間が長くなるとともに
塔規模も大きくなる6また、−基のノズル当りの水噴霧
量を少なくすれば液滴の微粒化は容易になし得るが、多
数のノズルを設置しなければならないため、その配置が
問題となる上。[Problem to be solved by the invention] For example, in the apparatus described in JP-A-61-287421, water is sprayed at one end of the oval desulfurization reaction tower in order to increase the water concentration. 100~200°
It is necessary to spray a large amount of water to bring the C exhaust gas to a water-saturated state of 50 to 70°C. When a large amount of water is sprayed, it takes a long time for the water to completely evaporate, and in order to extend the high humidity and low temperature region suitable for the desulfurization reaction, the height of the column must be increased. In addition, in order to obtain a high desulfurization rate by increasing the contact time between the exhaust gas and the desulfurization agent as much as possible, the height of the column inevitably increases. However, regarding this point, it is possible to deal with the problem of large-sized equipment by bending the desulfurization reaction tower in the middle part in a 0-shape as in the equipment described in JP-A No. 61-287421. Wear. However, if the long desulfurization reaction tube that forms the desulfurization reaction tower is used in an exposed state, the heat transfer area to the atmosphere increases and heat loss increases. It becomes difficult to maintain the temperature, and water condenses on the inner surface of the tube wall on the outlet side of the reaction tube. As a result, problems such as scale and corrosion due to a drop in acid dew point may occur. However, if attempts were made to reduce heat loss by using heat insulating materials or steam heaters to prevent this problem, the equipment would be forced to return and maintenance would become extremely difficult. Furthermore, if you try to spray a large amount of water with a small number of spray nozzles, the amount of water sprayed per spray nozzle will increase, so even if you use a two-fluid nozzle, there is a limit to the amount of fine droplets that can be produced. As the time to complete evaporation increases, the column size also increases.6 Also, droplets can be easily atomized by reducing the amount of water sprayed per nozzle, but this requires installing a large number of nozzles. , its placement becomes a problem.
ノズルのメンテナンスに膨大な時間を要する二とになる
ため実用的ではない。This is not practical because maintenance of the nozzle requires a huge amount of time.
そこ・て、本発明の目的は脱硫反応塔の温度を均一に維
持し、少量の水噴霧で相対湿度の高いガス相を形成する
コンパクトで、しかも設計上および運転上において簡単
な脱硫システムを提供することて゛ある。Therefore, the purpose of the present invention is to provide a compact desulfurization system that maintains a uniform temperature in the desulfurization reaction tower and forms a gas phase with high relative humidity with a small amount of water spray, and that is simple in design and operation. There is something to do.
[課題を解決するための手段] 本発明の上記目的は、次の構成により達成される。[Means to solve the problem] The above object of the present invention is achieved by the following configuration.
すなわち、燃焼装置から排出する排ガスにアルカリまた
はアルカリ土類金属化合物のうち少なくとも一種類以上
からなるを脱硫剤を加え、さらに脱硫反応塔内に水を添
加することで、燃焼排ガス中の硫黄酸化物を除去する排
煙脱硫装置において、一端を塞ぎ他端に排ガスの導入部
をもつ外筒と、両端ともに排ガス導入部をもつ内筒から
成り、該外筒と該内筒間をガスが流通でき、かつ該外筒
内を流通するガスの流れと該内筒内を流通するガスの流
れの向きが逆になるように該外筒内に該内筒を設置した
二東管m造を有する脱硫反応塔を設けた排煙脱硫装!
で、Plる。That is, by adding a desulfurizing agent consisting of at least one type of alkali or alkaline earth metal compound to the exhaust gas discharged from the combustion equipment, and further adding water to the desulfurization reaction tower, sulfur oxides in the combustion exhaust gas can be removed. A flue gas desulfurization device that removes gas consists of an outer cylinder that is closed at one end and has an exhaust gas inlet at the other end, and an inner cylinder that has exhaust gas inlets at both ends, so that gas can flow between the outer cylinder and the inner cylinder. , and desulfurization having a two-way pipe structure in which the inner cylinder is installed within the outer cylinder so that the direction of the flow of gas flowing inside the outer cylinder is opposite to the direction of the flow of gas flowing inside the inner cylinder. Flue gas desulfurization system equipped with a reaction tower! So, Pl.
脱硫剤は例えは 消石灰、生石灰、水酸化カリウム、水
酸化ナトリウム、炭酸ナトリウム等か用いろhる。Examples of desulfurizing agents include slaked lime, quicklime, potassium hydroxide, sodium hydroxide, and sodium carbonate.
5作用]
脱硫反応塔内?二重管構造のごとく内筒て仕切り、外筒
と内筒におけるガスの流れの向きを逆にすることにより
、脱硫反応塔に導入される燃焼排ガスの熱は、内筒を形
成する隔壁を介して熱交換器のごとく脱硫反応塔から排
出される後流側の排ガスに1云えらtしる、このため
脱硫反応塔内のガス温度は均一に維持されるようになり
、脱硫反応塔に入る排ガスは水の蒸発以外の熱移動によ
っても温度が低下し、より少ない量の水を噴霧するたけ
て、容易に脱硫反応に好適な低温 高湿度のガス相を形
成することができる。したがって、脱硫反応塔内壁への
水の凝縮か防止され、スプしノズルの低容量化を図るこ
とにより、脱硫反応塔もコンパクトにすることかできる
ため 装置コストを低減できるとと乙に装置の設計およ
び運転が容部になり、運転上のトラブルら少なくなる。5 Action] Inside the desulfurization reaction tower? By dividing the inner cylinder like a double pipe structure and reversing the direction of gas flow in the outer cylinder and inner cylinder, the heat of the combustion exhaust gas introduced into the desulfurization reaction tower is transferred through the partition wall forming the inner cylinder. 1 is added to the exhaust gas on the downstream side discharged from the desulfurization reaction tower like a heat exchanger.
The gas temperature inside the desulfurization reaction tower is now maintained uniformly, and the temperature of the exhaust gas entering the desulfurization reaction tower is lowered by heat transfer other than water evaporation, making it easier to spray less water. A low-temperature, high-humidity gas phase suitable for desulfurization reactions can be formed. Therefore, the condensation of water on the inner wall of the desulfurization reaction tower is prevented, and by reducing the capacity of the spray nozzle, the desulfurization reaction tower can be made more compact, thereby reducing equipment costs. This makes driving easier and reduces driving troubles.
[実施例]
本発明は下記の実施例によって さらに詳細に説明され
るか、下記の例で制限されるらのではない
実施例1
脱硫剤として消石灰を用い、消石灰と水と分けて供給す
るシステムにより排ガスを脱硫処理する場合について5
本発明法による装置を適用した例を用いて説明する。[Example] The present invention will be explained in more detail by the following example, or will not be limited by the following example. Example 1 System using slaked lime as a desulfurization agent and supplying slaked lime and water separately Regarding the case where exhaust gas is desulfurized by
An explanation will be given using an example in which a device according to the method of the present invention is applied.
第1図において、SO2などの酸性有毒ガスと消石灰を
含有した入口排ガス7は、排ガス導入管3より脱硫反応
塔に導入され、脱硫反応塔下部に取り付けられたスプレ
ノズル6より噴霧される水滴を同伴しながら反応塔外1
!Jlと反応塔内筒2の間を流通し、次いで反応塔内筒
2の中と流通し排ガス排出管4より出口排ガス8として
排出される。In Fig. 1, inlet exhaust gas 7 containing acidic toxic gas such as SO2 and slaked lime is introduced into the desulfurization reaction tower through an exhaust gas introduction pipe 3, and is accompanied by water droplets sprayed from a spray nozzle 6 installed at the bottom of the desulfurization reaction tower. while outside the reaction tower 1
! The gas flows between Jl and the reaction column inner tube 2, then flows through the reaction column inner tube 2, and is discharged from the exhaust gas exhaust pipe 4 as an outlet exhaust gas 8.
この間にスプレノズル6より噴霧された水か蒸発し水汁
a度の高い排ガスになるため、排ガス中の消石灰とSO
2などの酸性有毒ガスとの反応性か高まり脱硫反応が進
行する。しかし、脱硫反応塔に導入される入口排ガス7
の熱は、外筒1と内筒2の間を流通する間に内筒2を形
成する隔壁を介して熱交換器のごとく脱硫反応塔から排
出される後流側の出口排ガス8に伝えられる。このため
、脱硫反応塔に入る排ガス7は水の蒸発以外の熱移動に
よって温度か低下し、より少ない量の水を噴霧するだけ
で、容易に脱硫反応に好適な低温 高湿度のガス相分形
成することができる。したがって、−基のスプレノズル
当りの水噴霧量が少なくなり、液滴の微粒化が容易にな
るため、水の蒸発完了時間が短くなり、脱硫反応塔の塔
規模がコンパクトになる。また、スプレノズルの設!数
を少なくできるため、装置設計上その配置が容易になる
上、運転時のスプレノズルのメンテナンスも容易になる
。さらに、本実施例の場合、二重管構造の脱硫反応塔の
外筒1から排ガスを導入しているため、内筒2を成す隔
壁表面の温度が内筒2内を流通する排ガスの温度よりも
高くなるため、脱硫反応塔出口付近での脱硫反応塔内壁
への水の凝縮?防止することになり、スケールおよび#
′s改の低下による腐食等のトラブルを防ぐことができ
る。During this time, the water sprayed from the spray nozzle 6 evaporates and becomes exhaust gas with a high water content, so the slaked lime and SO in the exhaust gas
The reactivity with acidic toxic gases such as 2 increases and the desulfurization reaction progresses. However, the inlet exhaust gas 7 introduced into the desulfurization reaction tower
While flowing between the outer cylinder 1 and the inner cylinder 2, the heat is transferred to the outlet exhaust gas 8 on the downstream side discharged from the desulfurization reaction tower like a heat exchanger via the partition wall forming the inner cylinder 2. . Therefore, the temperature of the exhaust gas 7 entering the desulfurization reaction tower decreases due to heat transfer other than water evaporation, and by simply spraying a smaller amount of water, a low temperature, high humidity gas phase suitable for the desulfurization reaction can be easily formed. can do. Therefore, the amount of water sprayed per spray nozzle is reduced, and the droplets are easily atomized, so the time required to complete water evaporation is shortened, and the scale of the desulfurization reaction tower becomes compact. Also, install a spray nozzle! Since the number of spray nozzles can be reduced, it is easier to arrange them in terms of equipment design, and maintenance of the spray nozzles during operation is also easier. Furthermore, in the case of this example, since the exhaust gas is introduced from the outer cylinder 1 of the desulfurization reaction tower having a double pipe structure, the temperature of the surface of the partition wall forming the inner cylinder 2 is higher than the temperature of the exhaust gas flowing inside the inner cylinder 2. water becomes high, so water condenses on the inner wall of the desulfurization reaction tower near the outlet of the desulfurization reaction tower. Will prevent scale and #
Problems such as corrosion due to a decrease in 's modification can be prevented.
また、第2図は脱硫反応塔の軸方向の温度分布を表した
ものである。Moreover, FIG. 2 shows the temperature distribution in the axial direction of the desulfurization reaction tower.
従束法による脱硫反応塔の場合、外表面積が大きいため
、熱損失か大きく、脱硫反応塔の後流側ではガス温度か
低下する。しかし、本発明による実施例では脱硫反応塔
の後流側管壁に相当する内筒2と温度の高い入口排ガス
7が流通する外筒1て囲んでいるため、熱損失が少なく
、図のように脱硫反応塔内のガス温度をほぼ均一に保持
することができる。In the case of a desulfurization reaction tower using the bundle method, since the outer surface area is large, heat loss is large, and the gas temperature decreases on the downstream side of the desulfurization reaction tower. However, in the embodiment according to the present invention, the inner cylinder 2, which corresponds to the downstream pipe wall of the desulfurization reaction tower, and the outer cylinder 1, through which the high temperature inlet exhaust gas 7 flows, are surrounded, so there is less heat loss, as shown in the figure. The gas temperature within the desulfurization reaction tower can be maintained almost uniformly.
実)1fN2 本発明によるその他の実施例を第3図に示す。Actual) 1fN2 Another embodiment according to the invention is shown in FIG.
本実施例は、第1図で示した前記実施例の脱硫反応塔の
上下を逆にした構造で、水を上がら下に向けてスプレす
るようにしたものである。本実施例においても第1図と
同様の効果が得られる。This example has a structure in which the desulfurization reaction tower of the previous example shown in FIG. 1 is turned upside down, so that water is sprayed from the top to the bottom. In this embodiment as well, the same effects as in FIG. 1 can be obtained.
実施例3 本発明によるその他の実施例を第4図に示す。Example 3 Another embodiment according to the invention is shown in FIG.
本実施例は、第3図で示した前記実施例とほぼ同様の構
造をもつしのであるが、排ガスの流通方向が逆であり、
入口排ガス7は脱硫反応塔内筒2より導入され、外筒1
と内筒2の間を通って排ガス排出管4より排出されるも
のである。前記実施例1.2と同様の効果をもつ。This embodiment has almost the same structure as the embodiment shown in FIG. 3, but the exhaust gas flow direction is reversed.
The inlet exhaust gas 7 is introduced from the desulfurization reaction tower inner cylinder 2, and is introduced into the outer cylinder 1.
and the inner cylinder 2, and is discharged from the exhaust gas exhaust pipe 4. It has the same effect as the above-mentioned Example 1.2.
以上の実施例では脱硫剤として消石灰の例を示したが、
そのほかに生石灰や水酸化ナトリウム、炭酸ナトリウム
などのアルカリおよびアルカリ土類金属の酸化物、水酸
化物および炭酸塩などが用いられる。In the above examples, slaked lime was used as a desulfurizing agent, but
In addition, oxides, hydroxides, and carbonates of alkali and alkaline earth metals such as quicklime, sodium hydroxide, and sodium carbonate are used.
[発明の効果]
本発明によれば、脱硫反応塔における水の噴霧量を多く
することなく脱硫反応に好適な低温・高湿度のガス相を
形成することができるため、装置コストおよび運転コス
トを安価にできる上、装置の設計および運転操作が容易
になり、運転上のトラブルも少なくなる。[Effects of the Invention] According to the present invention, a low-temperature, high-humidity gas phase suitable for the desulfurization reaction can be formed without increasing the amount of water sprayed in the desulfurization reaction tower, so equipment costs and operating costs can be reduced. In addition to being inexpensive, the design and operation of the device are easier, and operational troubles are reduced.
第1図は本発明の実施例における脱硫反応塔のシステム
図、第2図は脱硫反応塔力軸方向におけるガス温度分布
を示す図、第3図および第4図は本発明の他の実施例に
おける脱硫反応塔のシステム図、第5図は従来の技術に
おける脱硫プロセスのフローシートである。
1・・・反応塔外筒、2・・反応塔内筒、6 ・水スプ
レノズル、7・・入口排ガス、8・・・出口排ガス出願
人 バブコック日立株式会社
代理人 弁理士 松永孝義 はか1名
第1図
第 3 因
第 21!1
8:出口排ガス
第4図
塔一方向長さFig. 1 is a system diagram of a desulfurization reaction tower according to an embodiment of the present invention, Fig. 2 is a diagram showing gas temperature distribution in the power axis direction of the desulfurization reaction tower, and Figs. 3 and 4 are other embodiments of the present invention. Fig. 5 is a system diagram of a desulfurization reaction tower in Fig. 5, which is a flow sheet of a desulfurization process in the conventional technology. 1... Reaction tower outer cylinder, 2... Reaction tower inner cylinder, 6 - Water spray nozzle, 7... Inlet exhaust gas, 8... Outlet exhaust gas Applicant Babcock Hitachi Co., Ltd. Agent Patent attorney Takayoshi Matsunaga Haka 1 person Figure 1 Figure 3 Factor 21!1 8: Outlet exhaust gas Figure 4 Length of tower in one direction
Claims (3)
ルカリ土類金属化合物のうち少なくとも一種類以上から
なる脱硫剤を加え、さらに脱硫反応塔内に水を添加する
ことで、燃焼排ガス中の硫黄酸化物を除去する排煙脱硫
装置において、 一端を塞ぎ他端に排ガスの導入部をもつ外筒と、両端と
もに排ガス流通開口部をもつ内筒から成り、該外筒と該
内筒間をガスが流通でき、かつ該外筒内を流通するガス
の流れと該内筒内を流通するガスの流れの向きが逆にな
るように該外筒内に該内筒を設置した二重管構造を有す
る脱硫反応塔を設けたことを特徴とする排煙脱硫装置。(1) By adding a desulfurizing agent made of at least one type of alkali or alkaline earth metal compound to the exhaust gas discharged from the combustion equipment and further adding water to the desulfurization reaction tower, sulfur oxides in the combustion exhaust gas can be removed. The flue gas desulfurization equipment for removing sulfur gas consists of an outer cylinder that is closed at one end and has an exhaust gas inlet at the other end, and an inner cylinder that has exhaust gas flow openings at both ends, and gas flows between the outer cylinder and the inner cylinder. desulfurization, and has a double-pipe structure in which the inner cylinder is installed inside the outer cylinder so that the direction of the flow of gas flowing inside the outer cylinder is opposite to the direction of the flow of gas flowing inside the inner cylinder. A flue gas desulfurization device characterized by being equipped with a reaction tower.
該内筒から排出させることを特徴とする請求項1記載の
排煙脱硫装置。(2) introducing combustion exhaust gas from the outer cylinder of the desulfurization reaction tower;
The flue gas desulfurization device according to claim 1, wherein the exhaust gas is discharged from the inner cylinder.
該外筒から排出することを特徴とする請求項1記載の排
煙脱硫装置。(3) introducing combustion exhaust gas from the inner cylinder of the desulfurization reaction tower;
The flue gas desulfurization device according to claim 1, wherein the exhaust gas is discharged from the outer cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2226748A JPH04110019A (en) | 1990-08-30 | 1990-08-30 | Stack gas desulfurization device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2226748A JPH04110019A (en) | 1990-08-30 | 1990-08-30 | Stack gas desulfurization device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04110019A true JPH04110019A (en) | 1992-04-10 |
Family
ID=16849993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2226748A Pending JPH04110019A (en) | 1990-08-30 | 1990-08-30 | Stack gas desulfurization device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04110019A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105080274A (en) * | 2015-09-14 | 2015-11-25 | 山东中信钙业有限公司 | Spraying type desulfurization dust catcher |
-
1990
- 1990-08-30 JP JP2226748A patent/JPH04110019A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105080274A (en) * | 2015-09-14 | 2015-11-25 | 山东中信钙业有限公司 | Spraying type desulfurization dust catcher |
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