JPH0515930B2 - - Google Patents
Info
- Publication number
- JPH0515930B2 JPH0515930B2 JP63039137A JP3913788A JPH0515930B2 JP H0515930 B2 JPH0515930 B2 JP H0515930B2 JP 63039137 A JP63039137 A JP 63039137A JP 3913788 A JP3913788 A JP 3913788A JP H0515930 B2 JPH0515930 B2 JP H0515930B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion furnace
- hydrogen chloride
- chloride gas
- alkaline agent
- supply
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 52
- 239000007789 gas Substances 0.000 claims description 48
- 239000003795 chemical substances by application Substances 0.000 claims description 40
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 38
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 38
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 38
- 239000002699 waste material Substances 0.000 claims description 28
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000460 chlorine Substances 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 11
- 239000000567 combustion gas Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- -1 rubber Chemical compound 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 14
- 239000000920 calcium hydroxide Substances 0.000 description 14
- 235000011116 calcium hydroxide Nutrition 0.000 description 14
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 14
- 230000007423 decrease Effects 0.000 description 12
- 239000000428 dust Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Gasification And Melting Of Waste (AREA)
- Treating Waste Gases (AREA)
- Incineration Of Waste (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ゴム等のように塩素を含有する廃棄
物を焼却する焼却装置において、その焼却の際に
発生する塩化水素ガスを除去するための方法に関
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is an incinerator for incinerating waste containing chlorine such as rubber, for removing hydrogen chloride gas generated during incineration. This relates to the method of
ゴム等のように塩素を含有する廃棄物を焼却す
ると、塩化水素ガスが発生するから、その塩化水
素ガスを含む燃焼ガスからの熱の回収を行う場合
には、熱回収装置が腐食し、また、そのまま大気
に排出すると大気を汚染することになる。
When waste containing chlorine, such as rubber, is incinerated, hydrogen chloride gas is generated, so when recovering heat from combustion gas containing hydrogen chloride gas, the heat recovery equipment may corrode and , if discharged directly into the atmosphere, it will pollute the atmosphere.
そこで、本発明者等は、先の特許出願（特願昭
61−147724号、特開昭63−6313号）において、ゴ
ム等のように塩素を含有する廃棄物を一次燃焼炉
内で不完全燃焼させ、発生した可燃性ガスを二次
燃焼炉内に導いて完全燃焼させる廃棄物焼却装置
において、前記二次燃焼炉内に、アルカリ剤を供
給することによつて、塩化水素ガスを除去するこ
とを提案した。 Therefore, the present inventors decided to apply for an earlier patent (patent application
61-147724, Japanese Patent Application Laid-open No. 63-6313), waste containing chlorine such as rubber is incompletely combusted in a primary combustion furnace, and the generated flammable gas is guided into a secondary combustion furnace. In a waste incinerator that completely burns the waste, it was proposed to remove hydrogen chloride gas by supplying an alkaline agent into the secondary combustion furnace.
そして、この廃棄物焼却装置を、連続式に運転
する場合には、燃焼ガス中に含まれる塩化水素ガ
スの濃度は略一定になるから、二次燃焼炉内にア
ルカリ剤を連続的に一定量づつ供給することによ
り、アルカリ剤の使用量に過不足なく塩化水素ガ
スを確実に除去できるのであつた。
When this waste incinerator is operated continuously, the concentration of hydrogen chloride gas contained in the combustion gas is approximately constant, so a constant amount of alkaline agent is continuously supplied into the secondary combustion furnace. By supplying the alkaline agent in portions, it was possible to reliably remove hydrogen chloride gas without using too much or too little of the alkaline agent.
しかし、前記廃棄物焼却装置をバツチ式に運転
する場合には、燃焼ガス中に含まれる塩化水素ガ
ス濃度は、燃焼の経過に伴つて大幅に変化するの
で、二次燃焼炉内へのアルカリ剤の供給量が一定
量であると、塩化水素ガス濃度が高くなつた場合
に、アルカリ剤が不足し、塩化水素ガスを除去す
ることができず、また、塩化水素ガス濃度が低く
なつた場合には、アルカリ剤が過剰になり、アル
カリ剤の消費量の増加だけでなく、ダスト量すな
わち残灰量の増大を招来し、しかも、廃棄物焼却
装置に後続する集塵装置に対する負荷の増加、及
び熱回収装置における伝熱管へのアルカリ剤の付
着の増大等の弊害が発生するのであつた。 However, when the waste incinerator is operated in a batch manner, the concentration of hydrogen chloride gas contained in the combustion gas changes significantly as the combustion progresses, so an alkaline agent is not allowed to enter the secondary combustion furnace. If the supply amount of hydrogen chloride gas is a certain amount, if the hydrogen chloride gas concentration increases, there will be a shortage of alkaline agent and the hydrogen chloride gas cannot be removed, and if the hydrogen chloride gas concentration decreases, In this case, the amount of alkaline agent becomes excessive, leading not only to an increase in the amount of alkaline agent consumed, but also to an increase in the amount of dust, that is, the amount of residual ash, and an increase in the load on the dust collector that follows the waste incinerator. This causes problems such as increased adhesion of alkaline agents to the heat transfer tubes in the heat recovery device.
そこで、この問題の解消方法として、燃焼ガス
中における塩化水素ガスの濃度を検出し、これに
応じてアルカリ剤の供給量を増減するようにフイ
ードバツク制御することが考えられるが、塩化水
素ガス濃度を検出する濃度計の応答には、３〜５
分の時間を要するものであり、この応答遅れのた
めに、塩化水素ガス濃度を所定値以下にするよう
にフイードバツク制御することができないのであ
つた。 Therefore, one possible way to solve this problem is to detect the concentration of hydrogen chloride gas in the combustion gas and perform feedback control to increase or decrease the amount of alkaline agent supplied accordingly. The response of the densitometer to detect is 3 to 5.
This response delay made it impossible to perform feedback control to keep the hydrogen chloride gas concentration below a predetermined value.
本発明は、前記廃棄物焼却装置をバツチ式で運
転した場合、塩化水素ガスは、運転開始の初期に
おいて温度が或る温度以上になつたとき多量に発
生し、以後時間の経過、つまり燃焼の進行につれ
て次第に低減すると云う実験結果に基づき、アル
カリ剤の供給量を制御することにより、アルカリ
剤の使用量の過不足を生じることなく、塩化水素
ガスを的確に除去できるようにした方法を提供す
るものである。 The present invention provides that when the waste incinerator is operated in batch mode, a large amount of hydrogen chloride gas is generated when the temperature reaches a certain temperature or higher at the beginning of the operation, and thereafter as time passes, that is, the combustion process continues. To provide a method in which hydrogen chloride gas can be accurately removed without causing excess or deficiency in the amount of alkaline agent used by controlling the amount of alkaline agent supplied based on experimental results showing that it gradually decreases as it progresses. It is something.
このため本発明は、ゴム等のように塩素を含有
する廃棄物を一次燃焼炉内で不完全燃焼させ、発
生した可燃性ガスを二次燃焼炉内に導いて完全燃
焼させると同時に、前記二次燃焼炉内に、燃焼ガ
ス中における塩化水素ガスを除去するためのアル
カリ剤を供給するようにしたバツチ式廃棄物焼却
装置において、前記一次燃焼炉内における燃焼開
始に際して温度上昇を検出し、一次燃焼炉内の温
度が或る温度に達すると、前記二次燃焼炉内への
アルカリ剤の供給を開始し、且つ、このアルカリ
剤の供給初期における供給量を最大とし、以後、
アルカリ剤の供給量を時間の経過につれて減少す
るように制御する方法を採用した。
For this reason, the present invention aims to incompletely burn waste containing chlorine such as rubber in a primary combustion furnace, and guide the generated flammable gas into a secondary combustion furnace to completely burn it. In a batch-type waste incinerator in which an alkaline agent for removing hydrogen chloride gas from the combustion gas is supplied into the secondary combustion furnace, a temperature rise is detected at the start of combustion in the primary combustion furnace, and the temperature rise in the primary combustion furnace is detected. When the temperature inside the combustion furnace reaches a certain temperature, the supply of the alkaline agent into the secondary combustion furnace is started, and the supply amount of this alkaline agent is maximized at the beginning of the supply, and thereafter,
A method was adopted in which the amount of alkaline agent supplied was controlled to decrease over time.
以下本発明の実施例を図面について説明する
と、第１図は廃棄物焼却装置の縦断正面図を示
し、この図において符号１は、ゴム等のように塩
素を含有する廃棄物を不完全燃焼するための乾溜
式の一次燃焼炉を、符号２は、前記一次燃焼炉１
で発生した可燃性ガスを完全燃焼するための二次
燃焼炉を各々示し、前記一次燃焼炉１の上部に
は、廃棄物の投入口３と可燃性ガス出口通路４と
を備え、一次燃焼炉１の下部には、火格子５及び
着火バーナ６並びに灰溜箱７を備えると共に、一
次送風機９からの一次空気供給ノズル８が接続さ
れている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a longitudinal sectional front view of a waste incinerator, and in this figure, reference numeral 1 indicates a method for incomplete combustion of waste containing chlorine such as rubber. 2 is a dry distillation type primary combustion furnace for
The primary combustion furnace 1 is equipped with a waste inlet 3 and a combustible gas outlet passage 4 in the upper part of the primary combustion furnace 1. The lower part of the fuel cell 1 is equipped with a grate 5, an ignition burner 6, and an ash box 7, and is connected to a primary air supply nozzle 8 from a primary blower 9.
前記二次燃焼炉２には、その上部に前記一次燃
焼炉１からの可燃性ガス出口通路４を接続すると
共に、補助バーナ１０を備え、下部に燃焼ガス出
口通路１１とダスト溜箱１２とを備えている。更
に、二次燃焼炉２における中途部の周囲には、複
数個の二次空気供給用ノズル１３が斜め下向きに
開口するように設けられている。 The secondary combustion furnace 2 is connected to the combustible gas outlet passage 4 from the primary combustion furnace 1 at its upper part, is equipped with an auxiliary burner 10, and has a combustion gas outlet passage 11 and a dust storage box 12 at its lower part. We are prepared. Further, a plurality of secondary air supply nozzles 13 are provided around the middle part of the secondary combustion furnace 2 so as to open diagonally downward.
また、図中符号１４は、二次空気供給用の送風
機を示し、該二次空気供給用送風機１４からのダ
クト１５を、前記各二次空気供給用ノズル１３に
各々接続すると共に、このダクト１５の途中に
は、当該ダクト１５内に炭酸カルシウム、硝石灰
又は生石灰等のアルカリ剤を、粉末やスラリーの
状態で供給するためのアルカリ剤供給装置１６が
設けられている。 Further, reference numeral 14 in the figure indicates a blower for supplying secondary air, and a duct 15 from the blower 14 for supplying secondary air is connected to each of the secondary air supply nozzles 13. An alkali agent supply device 16 is provided in the middle of the duct 15 for supplying an alkali agent such as calcium carbonate, nitric lime, or quicklime in the form of powder or slurry.
なお、前記二次燃焼炉２からの燃焼ガス出口通
路１１は、集塵装置１７、熱回収装置１８及び排
風用送風機１９を経て煙突２０に接続されてい
る。 Incidentally, the combustion gas outlet passage 11 from the secondary combustion furnace 2 is connected to the chimney 20 via a dust collector 17, a heat recovery device 18, and an exhaust blower 19.
前記一次燃焼炉１内にゴム等の廃棄物を投入
し、この廃棄物に着火バーナ６にて着火し、廃棄
物が燃焼を始めると、前記着火バーナ６を止める
一方、一次送風機９及び一次空気供給ノズル８か
ら、廃棄物の完全燃焼に必要な理論空気量より少
ない量に規制した一次空気を供給することによ
り、不完全燃焼する。 Waste such as rubber is put into the primary combustion furnace 1, and the waste is ignited by the ignition burner 6. When the waste starts to burn, the ignition burner 6 is stopped, while the primary blower 9 and the primary air are turned off. Incomplete combustion is achieved by supplying primary air from the supply nozzle 8 in an amount that is regulated to be less than the theoretical air amount required for complete combustion of the waste.
この不完全燃焼により一次燃焼炉１内には、塩
化水素ガスを含む可燃性ガスが発生し、この可燃
性ガスは、可燃性ガス出口通路４を介して二次燃
焼炉２内に導かれたのち、二次燃焼炉２内におい
て、二次空気の存在のもとに完全燃焼される一
方、塩化水素ガスは、アルカリ剤供給装置１６よ
り供給されるアルカリ剤と反応してアルカリ塩に
なり、底部におけるダスト溜箱１２に落下するよ
うに除去される。 This incomplete combustion generated flammable gas containing hydrogen chloride gas in the primary combustion furnace 1, and this flammable gas was led into the secondary combustion furnace 2 via the combustible gas outlet passage 4. Thereafter, in the secondary combustion furnace 2, the hydrogen chloride gas is completely combusted in the presence of secondary air, while the hydrogen chloride gas reacts with the alkali agent supplied from the alkali agent supply device 16 and becomes an alkali salt. It is removed so as to fall into the dust bin 12 at the bottom.
本発明者等は、前記廃棄物焼却装置にて、エチ
レンプロピレンゴムとクロロプレンゴムとを混合
した塩素含有量10％のゴム廃棄物の1600Kgを、バ
ツチ式に焼却運転した場合において、一次燃焼炉
１内における温度と、塩化水素ガス濃度とを、運
転時間の経過について測定した結果、塩化水素ガ
ス濃度は、第２図に曲線Ａで示すようになり、一
次燃焼炉１内の温度は、第２図に曲線Ｂで示すよ
うになるのであつた。 The present inventors have demonstrated that when 1,600 kg of rubber waste containing 10% chlorine, which is a mixture of ethylene propylene rubber and chloroprene rubber, is incinerated in a batch manner in the waste incinerator, the primary combustion furnace 1 As a result of measuring the temperature and hydrogen chloride gas concentration in the primary combustion furnace 1 over the course of operating time, the hydrogen chloride gas concentration became as shown by curve A in FIG. The result was as shown by curve B in the figure.
すなわち、燃焼の開始後、一次燃焼炉１内に温
度が約150℃を越えると、ゴムの熱分解が急速に
進んで、塩化水素ガス濃度が急激に上昇し、約
400℃で塩化水素ガス濃度が最高となり、以後は、
一次燃焼炉１内における温度の上昇は小さいが、
塩化水素ガス濃度は、時間の経過に伴つて次第に
減少し、その後において一次燃焼炉１内の温度が
下がると云う傾向を呈すると共に、燃焼開始から
略5.5時間経過したとき塩化水素ガス濃度が、大
気への塩化水素ガスの排出規制値である430ppm
（12％O2換算）以下に下がるのであり、また、他
の塩素を含有するゴム廃棄物についても、略同じ
ような傾向を呈するのであつた。 In other words, when the temperature in the primary combustion furnace 1 exceeds approximately 150°C after the start of combustion, thermal decomposition of the rubber proceeds rapidly and the concentration of hydrogen chloride gas rises rapidly, causing a temperature of approximately 150°C.
The hydrogen chloride gas concentration reaches its maximum at 400℃, and after that,
Although the temperature rise inside the primary combustion furnace 1 is small,
The hydrogen chloride gas concentration gradually decreases with the passage of time, and then the temperature inside the primary combustion furnace 1 decreases, and when approximately 5.5 hours have passed from the start of combustion, the hydrogen chloride gas concentration has increased to the atmospheric level. The regulation value for hydrogen chloride gas emissions is 430ppm.
(equivalent to 12% O 2 ), and other chlorine-containing rubber wastes exhibited almost the same tendency.
一方、二次燃焼炉２内へのアルカリ剤の供給量
は、塩化水素ガスとの反応率を考慮して、可燃性
ガス中における塩化水素ガスの1.0〜1.5倍程度が
適当であり、例えば、塩素含有量が10％のゴム廃
棄物1600Kgを焼却する場合では、1600×0.1≒160
Kgの塩素が存在する。この塩素に起因する塩化水
素ガスを消石灰〔Ca（OH）2〕の供給で、
2HCl＋Ca（OH）2→CaCl2＋H2O
の反応によつて除去するには、
160／35.5×74／２＝167Kgの消石灰の量になり（但し、
この式中、35.5は塩素の分子量、74は消石灰の分
子量）、これに前記反応率を加味すると、消石灰
の必要量は、約250Kgになる。 On the other hand, the amount of alkaline agent supplied into the secondary combustion furnace 2 is approximately 1.0 to 1.5 times the amount of hydrogen chloride gas in the combustible gas, taking into account the reaction rate with hydrogen chloride gas. For example, When incinerating 1600 kg of rubber waste with 10% chlorine content, 1600×0.1≒160
Kg of chlorine is present. To remove hydrogen chloride gas caused by chlorine through the reaction of 2HCl + Ca(OH) 2 → CaCl 2 + H 2 O by supplying slaked lime [Ca(OH) 2 ], 160/35.5×74/2= The amount of slaked lime is 167Kg (in this formula, 35.5 is the molecular weight of chlorine and 74 is the molecular weight of slaked lime), and when the above reaction rate is taken into account, the required amount of slaked lime is approximately 250Kg.
そこで、この量の消石灰を前記アルカリ剤供給
装置１６より供給するに際して、このアルカリ剤
供給装置１６を、当該アルカリ剤供給装置１６の
作動（回転数）を制御するための制御回路２１を
介して、前記一次燃焼炉１に設けた温度検出セン
サー２２に関連し、一次燃焼炉１における温度
が、塩化水素ガスの発生が始まる温度（約150℃）
まで上昇すれば、消石灰の供給を開始すると共
に、この消石灰の供給初期における供給量を最大
とし、以後、消石灰の供給量を時間の経過につれ
て減少するように制御するのである。 Therefore, when this amount of slaked lime is supplied from the alkali agent supply device 16, the alkali agent supply device 16 is controlled via a control circuit 21 for controlling the operation (rotation speed) of the alkali agent supply device 16. In relation to the temperature detection sensor 22 provided in the primary combustion furnace 1, the temperature in the primary combustion furnace 1 is the temperature at which hydrogen chloride gas starts to be generated (approximately 150°C).
When the amount of slaked lime increases, the supply of slaked lime is started, and the supply amount of slaked lime is maximized at the beginning of the supply, and thereafter the supply amount of slaked lime is controlled to decrease as time passes.
例えば、消石灰の供給を、第３図に示すよう
に、前記温度（約150℃）に上昇したときから開
始すると共に、そのときから30分までの間を、１
時間当たり160Kgの最大供給量にする一方、次の
30分の間を１時間当たり120Kgの供給量とし、そ
の後における30分の間を１時間当たり80Kgの供給
量とし、次いで30分の間を１時間当たり40Kgの供
給量とし、そして最後における２時間30分の間を
１時間当たり20Kgの供給量とすると云うように、
運転時間の経過につれて段階的に減少し、消石灰
の総供給量を250Kgとするように設定した。 For example, as shown in Figure 3, the supply of slaked lime starts when the temperature rises to the above temperature (approximately 150°C), and continues for 30 minutes from that time.
Maximum supply of 160Kg per hour while
The supply rate is 120Kg per hour for 30 minutes, the supply rate is 80Kg per hour for the next 30 minutes, the supply rate is 40Kg per hour for the next 30 minutes, and the last 2 hours. Assuming that the supply amount is 20 kg per hour for 30 minutes,
The total amount of slaked lime supplied was set to 250 kg, decreasing in stages as the operating time progressed.
この結果、二次燃焼炉２内への消石灰の供給量
曲線を、前記第２図に示す塩化水素ガス濃度曲線
Ａに近似したものにすることがきるから、消石灰
の供給量を、塩化水素ガス濃度から大きく外れる
ことなく制御することができるのであり、消石灰
の供給量を前記のように設定した場合、二次燃焼
炉２からの燃焼ガス出口通路１１内における塩化
水素ガス濃度は、運転時間中の総てにわたつて
100ppm以下に維持することができるのであつた。 As a result, the supply amount curve of slaked lime into the secondary combustion furnace 2 can be approximated to the hydrogen chloride gas concentration curve A shown in FIG. It is possible to control the concentration without significantly deviating from the concentration, and when the supply amount of slaked lime is set as described above, the hydrogen chloride gas concentration in the combustion gas outlet passage 11 from the secondary combustion furnace 2 will be maintained at a constant level during the operating time. over all of
It was possible to maintain the concentration below 100 ppm.
なお、アルカリ剤の供給量を、時間の経過につ
れて減少するように制御する方法としては、前記
実施例のように段階的に減少する場合に限らず、
連続して次第に減少するように構成しても良いの
である。 Note that the method of controlling the supply amount of the alkali agent so as to decrease over time is not limited to the stepwise decrease as in the above embodiment.
It may be configured so that it continuously decreases gradually.
以上の通り本発明は、塩化水素ガスを除去する
ために二次燃焼炉内に供給するアルカリ剤を、一
次燃焼炉内の温度が或る温度に達した時点から供
給開始し、このアルカリ剤の供給初期における供
給量を最大とし、以後、アルカリ剤の供給量を時
間の経過につれて減少するように制御することに
より、廃棄物焼却装置をバツチ式に運転する場合
において、塩化水素ガス濃度が第２図に曲線Ａで
示すようになることに対して、前記アルカリ剤の
供給量曲線を、前記第２図の塩化水素ガス濃度曲
線Ａに近似することが容易にできるのである。
As described above, the present invention starts supplying the alkaline agent into the secondary combustion furnace to remove hydrogen chloride gas from the time when the temperature inside the primary combustion furnace reaches a certain temperature, and When the waste incinerator is operated in batches, the supply amount of the alkaline agent is maximized at the initial stage of supply, and then the supply amount of the alkali agent is controlled to decrease as time passes. In contrast to the curve A shown in the figure, the supply amount curve of the alkali agent can be easily approximated to the hydrogen chloride gas concentration curve A in FIG.
その結果、バツチ式廃棄物焼却装置で発生する
塩化水素ガスを、アルカリ剤の供給によつて除去
する場合に、アルカリ剤の供給量が大幅に過不足
することを防止できるから、アルカリ剤の不足に
よる大気の汚染及び熱回収装置の腐食を確実に低
減できると共に、アルカリ剤の過剰による集塵装
置の負荷の増大及び熱回収装置の機能低下並びに
アルカリ剤の使用量の増加を確実に防止できる効
果を有する。 As a result, when hydrogen chloride gas generated in a batch-type waste incinerator is removed by supplying an alkaline agent, it is possible to prevent the supply amount of the alkaline agent from being significantly excessive or insufficient. It is possible to reliably reduce air pollution due to the use of alkaline agents and corrosion of the heat recovery equipment, and also to reliably prevent an increase in the load on the dust collector, a decrease in the function of the heat recovery equipment, and an increase in the amount of alkaline agents used due to excessive use of alkaline agents. has.
図面は本発明の実施例を示し、第１図は廃棄物
焼却装置の縦断正面図、第２図は運転時間と塩化
水素ガス濃度及び温度との関係を示す図、第３図
は運転時間と消石灰の噴射供給量との関係を示す
図である。
１……一次燃焼炉、２……二次燃焼炉、４……
可燃性ガス出口通路、１１……燃焼ガス出口通
路、１３……二次空気供給用ノズル、１６……ア
ルカリ剤供給装置、２１……制御回路、２２……
温度検出センサー。
The drawings show an embodiment of the present invention, with Fig. 1 being a longitudinal sectional front view of a waste incinerator, Fig. 2 showing the relationship between operating time, hydrogen chloride gas concentration and temperature, and Fig. 3 showing the relationship between operating time and temperature. It is a figure which shows the relationship with the injection supply amount of slaked lime. 1...Primary combustion furnace, 2...Secondary combustion furnace, 4...
Combustible gas outlet passage, 11... Combustion gas outlet passage, 13... Secondary air supply nozzle, 16... Alkaline agent supply device, 21... Control circuit, 22...
Temperature detection sensor.
Claims (1)
燃焼炉内で不完全燃焼させ、発生した可燃性ガス
を二次燃焼炉内に導いて完全燃焼させると同時
に、前記二次燃焼炉内に、燃焼ガス中における塩
化水素ガスを除去するためのアルカリ剤を供給す
るようにしたバツチ式廃棄物焼却装置において、
前記一次燃焼炉内における燃焼開始に際しての温
度を検出し、一次燃焼炉内の温度が或る温度に達
すると、前記二次燃焼炉内へのアルカリ剤の供給
を開始し、且つ、このアルカリ剤の供給初期にお
ける供給量を最大とし、以後、アルカリ剤の供給
量を時間の経過につれて減少するように制御する
ことを特徴とするバツチ式廃棄物焼却装置におけ
る塩化水素ガスの除去方法。1 Waste containing chlorine, such as rubber, is incompletely combusted in a primary combustion furnace, and the generated flammable gas is led into a secondary combustion furnace to be completely combusted, and at the same time, In a batch-type waste incinerator that supplies an alkaline agent to remove hydrogen chloride gas from combustion gas,
The temperature at the start of combustion in the primary combustion furnace is detected, and when the temperature in the primary combustion furnace reaches a certain temperature, the supply of an alkali agent into the secondary combustion furnace is started, and the alkaline agent is A method for removing hydrogen chloride gas in a batch-type waste incinerator, characterized by controlling the supply amount of the alkaline agent to be maximum at the initial stage of the supply, and thereafter decreasing the supply amount of the alkaline agent as time passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039137A JPH01212809A (en) | 1988-02-22 | 1988-02-22 | Removal of hydrogen chloride gas in batch type waste incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039137A JPH01212809A (en) | 1988-02-22 | 1988-02-22 | Removal of hydrogen chloride gas in batch type waste incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01212809A JPH01212809A (en) | 1989-08-25 |
| JPH0515930B2 true JPH0515930B2 (en) | 1993-03-03 |
Family
ID=12544718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63039137A Granted JPH01212809A (en) | 1988-02-22 | 1988-02-22 | Removal of hydrogen chloride gas in batch type waste incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01212809A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK0930091T3 (en) * | 1997-04-25 | 2004-09-06 | Jfe Eng Corp | Process for the treatment of flue gases |
| KR100354813B1 (en) * | 1999-10-26 | 2002-09-30 | 사단법인 고등기술연구원 연구조합 | Air supply device for an incinerator |
| JP5401578B2 (en) * | 2012-03-29 | 2014-01-29 | メタウォーター株式会社 | Organic waste treatment apparatus and treatment method, and combustion apparatus control method and control apparatus |
-
1988
- 1988-02-22 JP JP63039137A patent/JPH01212809A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01212809A (en) | 1989-08-25 |
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