JPH0755121A - Method and device for processing waste - Google Patents
Method and device for processing wasteInfo
- Publication number
- JPH0755121A JPH0755121A JP19727393A JP19727393A JPH0755121A JP H0755121 A JPH0755121 A JP H0755121A JP 19727393 A JP19727393 A JP 19727393A JP 19727393 A JP19727393 A JP 19727393A JP H0755121 A JPH0755121 A JP H0755121A
- Authority
- JP
- Japan
- Prior art keywords
- waste
- thermal decomposition
- chlorine
- temperature
- 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.)
- Pending
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- Gasification And Melting Of Waste (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、家庭や産業から排出さ
れる可燃物を含む廃棄物を熱分解し、その熱分解生成物
を燃焼して生じる熱エネルギーを電力などに変換して回
収する廃棄物処理方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention thermally decomposes wastes containing combustible substances discharged from homes and industries, converts the thermal energy produced by burning the thermally decomposed products into electric power and recovers it. The present invention relates to a waste treatment method and device.
【０００２】[0002]
【従来の技術】この種の廃棄物処理技術は、特開平１−
４９８１６号公報に開示されている。同公報に開示され
ている技術では、可燃物を含む廃棄物を加熱して熱分解
し、これにより生成される熱分解ガスを含む熱分解生成
物を燃焼し、燃焼排ガスを廃熱ボイラに導いて蒸気を発
生させ、その蒸気により発電して熱エネルギーを回収し
ている。また、熱分解生成物の燃焼に際して、熱分解生
成物に含まれる灰分等の燃焼残渣を溶融スラグ化する高
温（例えば、１２００℃以上）で燃焼させることによ
り、燃焼残渣を建造物や道路の骨材などに再利用可能な
スラグに変換するようにしている。2. Description of the Related Art A waste treatment technology of this type is disclosed in Japanese Patent Laid-Open No.
It is disclosed in Japanese Patent Publication No. 49816. In the technology disclosed in the publication, a waste containing a combustible material is heated and pyrolyzed, and a pyrolysis product containing a pyrolysis gas generated thereby is burned to guide combustion exhaust gas to a waste heat boiler. To generate steam, which is then used to generate electricity to recover heat energy. Further, when the thermal decomposition product is burned, the combustion residue such as ash contained in the thermal decomposition product is burned at a high temperature (for example, 1200 ° C. or higher) to form molten slag, so that the combustion residue is removed from the bone of a building or a road. I try to convert it into slag that can be reused as wood.
【０００３】このように、特開平１−４９８１６号公報
の技術によれば、廃棄物を熱分解して燃焼し、その熱エ
ネルギーを電力として有効利用できる他、灰分などの燃
焼残渣はスラグ化してリサイクルを図ることができる。As described above, according to the technique disclosed in Japanese Patent Application Laid-Open No. 1-49816, the waste is pyrolyzed and burned, and its thermal energy can be effectively used as electric power, and combustion residues such as ash are slagged. It can be recycled.
【０００４】[0004]
【発明が解決しようとする課題】上記の従来技術によれ
ば、処理する廃棄物に塩化ビニルなどの塩素分を含む廃
棄物が含まれていると、熱分解ガス及びその燃焼排ガス
に塩化水素などの塩素分が含まれてしまい、その塩素分
により廃熱ボイラなどの熱交換器の伝熱面が腐食される
という問題がある。According to the above-mentioned prior art, when the waste to be treated contains a waste containing chlorine such as vinyl chloride, the pyrolysis gas and the combustion exhaust gas thereof include hydrogen chloride and the like. However, there is a problem that the heat transfer surface of a heat exchanger such as a waste heat boiler is corroded by the chlorine content included in the heat exchanger.
【０００５】このような塩素分によるボイラ伝熱面の腐
食は、燃焼排ガス温度がほぼ３３０℃近傍から生じ、特
に５００℃〜７００℃で急速に進むことが知られてい
る。一方、ボイラ伝熱面の燃焼排ガス側の外面温度は、
給水加熱器及び蒸発器においては、内部流体が液相又は
２相流であり内面の熱伝達率が大きいので、内部流体の
温度に支配されて塩素分による腐食雰囲気温度までには
至らない。しかし、過熱器の出口側は内部流体が乾き蒸
気であり、内面の熱伝達率が小さいので外面温度は燃焼
排ガス温度に支配されて高くなるから、塩素分による腐
食が問題となる。It is known that the corrosion of the boiler heat transfer surface due to the chlorine content occurs when the combustion exhaust gas temperature is around 330 ° C., and particularly rapidly at 500 ° C. to 700 ° C. On the other hand, the outer surface temperature of the combustion exhaust gas side of the boiler heat transfer surface is
In the feed water heater and the evaporator, since the internal fluid is a liquid phase or a two-phase flow and the inner surface has a large heat transfer coefficient, the temperature of the internal fluid does not reach the corrosive atmosphere temperature due to the chlorine content. However, on the outlet side of the superheater, the internal fluid is dry steam and the heat transfer coefficient of the inner surface is small, so the outer surface temperature rises due to the temperature of the combustion exhaust gas, so corrosion due to chlorine content becomes a problem.
【０００６】そこで、過熱器の塩素分による腐食を抑制
するには、燃焼排ガス温度が腐食雰囲気の温度以下（例
えば５００℃以下）に低下したゾーン、例えば蒸発器の
下流側に過熱器を配置する等の対策が必要になったり、
そのような温度条件のゾーンに過熱器を配置することに
より例えば発生蒸気が３００℃、３０気圧程度に抑えら
れる等、蒸気の質が低く抑えられることになる。このた
め、装置が大きくなったり、発電効率（熱回収効率）を
高めることができないという問題がある。Therefore, in order to suppress the corrosion of the superheater due to the chlorine content, the superheater is arranged in a zone where the temperature of the combustion exhaust gas is lowered to the temperature of the corrosive atmosphere (for example, 500 ° C. or lower), for example, on the downstream side of the evaporator. Such as the need for measures such as
By arranging the superheater in the zone of such temperature condition, the quality of the steam can be suppressed low, for example, the generated steam can be suppressed to about 300 ° C. and 30 atm. Therefore, there are problems that the device becomes large and the power generation efficiency (heat recovery efficiency) cannot be improved.
【０００７】このようなことから、塩素分による廃熱ボ
イラなどの腐食を防止するには、廃熱ボイラなどに導く
前に燃焼排ガス中の塩素分を除去することが望ましい
が、燃焼排ガスは高温であるから塩化水素などの塩素分
を除去することは技術的、経済的に困難である。From the above, in order to prevent the corrosion of the waste heat boiler and the like due to the chlorine content, it is desirable to remove the chlorine content in the combustion exhaust gas before introducing it into the waste heat boiler, etc. Therefore, it is technically and economically difficult to remove chlorine components such as hydrogen chloride.
【０００８】本発明は、塩素分を含む廃棄物の熱分解生
成物を燃焼して生ずる燃焼排ガスの熱エネルギーを熱交
換により回収するにあたり、熱交換器の塩素による腐食
を防止でき、かつ熱回収効率を高めることができる廃棄
物処理方法及び装置を提供することを目的とする。According to the present invention, in recovering the thermal energy of the combustion exhaust gas generated by burning the thermal decomposition product of waste containing chlorine by heat exchange, it is possible to prevent corrosion of the heat exchanger by chlorine and to recover the heat. An object of the present invention is to provide a waste treatment method and apparatus that can improve efficiency.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するた
め、本発明の廃棄物処理方法及び装置は、可燃物を含む
廃棄物を加熱して熱分解し、この熱分解により排出され
る熱分解ガスを含む熱分解生成物を燃焼残渣が溶融スラ
グ化する温度で燃焼し、この燃焼により排出される燃焼
排ガスの熱エネルギーを熱交換により回収するにあた
り、前記熱分解工程の前に前記廃棄物をその廃棄物に含
まれる塩素分を脱気し得る温度に加熱し、その廃棄物に
含まれる塩素分を除去するようにしたことを特徴とす
る。In order to solve the above-mentioned problems, the waste treatment method and apparatus of the present invention heats and thermally decomposes waste containing combustible substances, and the thermal decomposition discharged by this thermal decomposition. When the thermal decomposition product containing gas is burned at a temperature at which the combustion residue becomes molten slag, and the heat energy of the combustion exhaust gas discharged by this combustion is recovered by heat exchange, the waste is removed before the thermal decomposition step. It is characterized in that the chlorine content contained in the waste is heated to a temperature at which it can be degassed to remove the chlorine content contained in the waste.
【００１０】[0010]
【作用】本発明は、廃棄物中の塩素分は比較的低い温度
（例えば、塩化ビニルの場合は３００℃〜３４０℃）に
より分解してガス化されるという知見に基づいてなされ
たものである。すなわち、本発明の廃棄物処理方法及び
装置によれば、廃棄物を通常の熱分解処理する前に、塩
素分が脱気し得る温度に加熱するという簡易な手段によ
り廃棄物から塩素分が除去されるため、通常の熱分解で
得られる熱分解生成物中の塩素分の含有量を著しく低減
できる。これにより、その熱分解生成物を燃焼して得ら
れる燃焼排ガスの塩素分の含有量も著しく低減されるか
ら、廃熱ボイラ過熱器等の伝熱面の塩素分による腐食の
問題が生じない。したがって、過熱器等の熱回収用の熱
交換器を燃焼排ガス温度が十分に高いゾーンに配置する
ことが可能になり、蒸気温度や圧力等の蒸気条件を改善
できることから、熱回収効率を向上させることができ
る。The present invention was made based on the finding that the chlorine content in waste is decomposed and gasified at a relatively low temperature (for example, in the case of vinyl chloride, 300 ° C to 340 ° C). . That is, according to the waste treatment method and apparatus of the present invention, the chlorine content is removed from the waste by a simple means of heating the waste to a temperature at which the chlorine content can be degassed before the thermal decomposition treatment. Therefore, the content of chlorine in the thermal decomposition product obtained by ordinary thermal decomposition can be significantly reduced. As a result, the chlorine content of the combustion exhaust gas obtained by burning the thermal decomposition products is remarkably reduced, so that the problem of corrosion due to chlorine on the heat transfer surface of the waste heat boiler superheater or the like does not occur. Therefore, it becomes possible to arrange a heat exchanger such as a superheater for heat recovery in a zone where the temperature of the combustion exhaust gas is sufficiently high, and steam conditions such as steam temperature and pressure can be improved, thereby improving heat recovery efficiency. be able to.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面を参照しつつ説
明する。図１は本発明の一実施例である廃棄物処理装置
の系統図である。加熱器１は本発明の特徴部である廃棄
物から塩素分を脱気する前処理装置を形成する。本実施
例において、加熱器１には一般的な熱分解ドラムが用い
られており、家庭ゴミなどの廃棄物が供給装置２によっ
て供給される。この加熱器１は内部に図示しない多数の
加熱管が設けられており、その加熱管内部に高温空気を
流通し、供給装置２により供給される廃棄物をほぼ酸素
遮断雰囲気下で廃棄物中の塩素分が脱気しうる温度に加
熱して、この廃棄物中の塩素分を脱気するようになって
いる。ここで、塩素分が脱気しうる温度は、一般に比較
的低温（例えば、塩化ビニルの場合は、３００〜３４０
℃程度）であり、廃棄物中の塩素分は主として塩化水素
ガスとして脱気される。塩素分が除去又は低減された廃
棄物は送給装置３により熱分解装置を形成する熱分解反
応器４に送られる。また、脱気された塩化水素及び加熱
により蒸発した廃棄物中の水分などからなるガスは導管
６を介して脱塩塔５に送られる。脱塩塔５に送られたガ
ス中の塩化水素ガスは苛性ソーダにより中和され、これ
により脱塩された後のガスは導管９を介して燃焼装置８
に導入される。なお、脱塩後のガスを燃焼装置８に導入
しない構成としてもよい。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of a waste treatment apparatus which is an embodiment of the present invention. The heater 1 forms a pretreatment device for degassing chlorine from waste, which is a feature of the present invention. In this embodiment, a general pyrolysis drum is used as the heater 1, and waste such as household waste is supplied by the supply device 2. This heater 1 is provided with a large number of heating pipes (not shown) inside, and high-temperature air is circulated inside the heating pipes so that the wastes supplied by the supply device 2 can be removed from the wastes under an oxygen-blocking atmosphere. The chlorine content in this waste is degassed by heating to a temperature at which the chlorine content can be degassed. Here, the temperature at which chlorine can be degassed is generally at a relatively low temperature (for example, in the case of vinyl chloride, 300 to 340).
The chlorine content in the waste is mainly degassed as hydrogen chloride gas. The waste from which the chlorine content has been removed or reduced is sent by the feeding device 3 to the pyrolysis reactor 4 forming a pyrolysis device. Further, a gas composed of degassed hydrogen chloride and water contained in the waste evaporated by heating is sent to the desalting tower 5 via the conduit 6. The hydrogen chloride gas in the gas sent to the desalting tower 5 is neutralized by caustic soda, and the gas after being desalted by this is passed through the conduit 9 to the combustion device 8
Will be introduced to. The degassed gas may not be introduced into the combustion device 8.
【００１２】熱分解反応器４は廃棄物の熱分解装置を形
成するものであり、本実施例においては、通常の熱分解
ドラムが用いられている。熱分解反応器４は加熱器１と
同様、内部に図示しない多数の加熱管が設けられてお
り、その加熱管内に高温空気を流通するようになってい
る。これにより、熱分解反応器４の内部に導入される塩
素分が除去された廃棄物は、ほぼ酸素遮断雰囲気下で比
較的高温の３００〜６００℃程度、望ましくは４５０℃
程度の温度に加熱される。この加熱により廃棄物は熱分
解され、これにより発生した熱分解ガスは導管２８によ
り燃焼装置８に送られ、熱分解により生じた残渣は不燃
物分別設備７に送られる。また、熱分解により生じた熱
分解カーボン、可燃性の浮遊物、灰分などを含む熱分解
生成物も、熱分解ガスに同伴して燃焼装置８に送られ
る。また、熱分解残渣としては、不燃物（鉄、アルミ、
ガレキなど）、灰分、熱分解カーボンなどが混ざったも
のである。The thermal decomposition reactor 4 forms a waste thermal decomposition device, and in the present embodiment, an ordinary thermal decomposition drum is used. Like the heater 1, the thermal decomposition reactor 4 is provided with a large number of heating pipes (not shown) therein, and high-temperature air is circulated in the heating pipes. As a result, the chlorine-removed waste introduced into the thermal decomposition reactor 4 has a relatively high temperature of approximately 300 to 600 ° C., preferably 450 ° C., in an oxygen-blocking atmosphere.
Heated to a temperature of the order. By this heating, the waste is pyrolyzed, the pyrolysis gas generated thereby is sent to the combustion device 8 by the conduit 28, and the residue generated by the pyrolysis is sent to the incombustible material separation facility 7. In addition, pyrolysis carbon including pyrolysis carbon, flammable suspended matter, and ash generated by pyrolysis is also sent to the combustion device 8 together with the pyrolysis gas. In addition, non-combustible materials (iron, aluminum,
Debris), ash, pyrolytic carbon, etc. are mixed.
【００１３】不燃物分別設備７では、この熱分解残渣が
例えば４５０℃程度で熱分解されて生じたのであれば、
図示しない冷却コンベアで８０℃程度に冷却され、図示
しない振動篩により比較的粗い成分と比較的細かい成分
とに分ける。この比較的細かい成分は主として灰分と熱
分解カーボンとからなるが、図示しない粉砕装置で１ｍ
ｍ以下程度の粒径に粉砕して送給装置１０により燃焼装
置８に送る。比較的粗い成分は主として不燃物からな
り、さらに、鉄、アルミ、ガレキなどに分別して、それ
ぞれ図示しないホッパに貯められる。In the incombustible material separation equipment 7, if the thermal decomposition residue is generated by thermal decomposition at about 450 ° C.,
It is cooled to about 80 ° C. by a cooling conveyor (not shown), and is separated into relatively coarse components and relatively fine components by a vibrating screen (not shown). This relatively fine component is mainly composed of ash and pyrolytic carbon, but 1 m
The powder is pulverized to a particle size of about m or less and sent to the combustion device 8 by the feeding device 10. The relatively coarse components mainly consist of incombustibles, and are further sorted into iron, aluminum, rubble, etc., and stored in hoppers (not shown).
【００１４】燃焼装置８は燃焼溶融炉であり、炉内に導
入された熱分解ガス、熱分解カーボン、灰分などの熱分
解生成物を所定の過剰の酸素条件下で高温燃焼する。温
度は１２００℃程度以上、好ましくは、灰分の溶融温度
より１００〜１５０℃程度高い１３００℃程度とする。
炉内滞留時間は有機分を高温で酸化分解するのに十分な
時間とする。この燃焼により生じた溶融灰は、例えば、
炉底に設けられた溶融灰排出口１１から冷却水槽１６に
落ちて急冷され、水砕スラグとして回収される。The combustion device 8 is a combustion melting furnace and burns pyrolysis products such as pyrolysis gas, pyrolysis carbon, and ash introduced into the furnace at a high temperature under a predetermined excess oxygen condition. The temperature is about 1200 ° C. or higher, and preferably about 1300 ° C., which is about 100 to 150 ° C. higher than the melting temperature of ash.
The residence time in the furnace is set to a time sufficient for oxidative decomposition of organic matter at high temperature. The molten ash produced by this combustion is, for example,
From the molten ash discharge port 11 provided at the bottom of the furnace, it falls into the cooling water tank 16 and is rapidly cooled, and is recovered as water granulated slag.
【００１５】燃焼により生じた燃焼排ガスは高温空気加
熱器１２を介して廃熱ボイラ１８に導かれる。高温空気
加熱器１２は熱交換器であり燃焼排ガスにより空気を加
熱する。この空気は高温空気加熱器１２と熱分解反応器
４とを結ぶ導管１３、熱分解反応器４と加熱器１とを結
ぶ導管１４、加熱器１と高温空気加熱器１２とを結ぶ導
管１５とを介し、ブロワ１７により高温空気加熱器１
２、熱分解反応器４、加熱器１とを循環する。高温空気
加熱器１２における熱交換により、例えば１３００℃で
燃焼装置８を出た燃焼排ガスは、例えば９００℃程度に
減温され、廃熱ボイラ１８に導かれる。高温空気加熱器
１２における熱交換により加熱された空気は導管１３を
介して熱分解反応器４に導かれて前述の図示しない熱分
解反応器４内の加熱管を通過する。これにより、この高
温空気は前述の熱分解の熱源となる。この加熱管を通過
して、ある程度冷却された高温空気は、導管１４に導か
れて前述の図示しない加熱器１内の加熱管を通過し、塩
素分の脱気熱源となる。加熱器１を出た空気は導管１５
を介して高温空気加熱器１２に戻り加熱される。なお、
導管１３と導管１４との間には導管１９が設けられ、導
管１９にはバルブ２０が配置され、高温空気の一部を高
温空気熱交換器１２に導入し、残りを直接加熱器１に導
入することを可能としている。The combustion exhaust gas generated by the combustion is guided to the waste heat boiler 18 via the high temperature air heater 12. The high temperature air heater 12 is a heat exchanger and heats air by the combustion exhaust gas. This air includes a conduit 13 connecting the high temperature air heater 12 and the thermal decomposition reactor 4, a conduit 14 connecting the thermal decomposition reactor 4 and the heater 1, and a conduit 15 connecting the heater 1 and the high temperature air heater 12. High temperature air heater 1 by blower 17 through
2. Circulate through the pyrolysis reactor 4 and the heater 1. Due to heat exchange in the high-temperature air heater 12, the combustion exhaust gas that has left the combustion device 8 at 1300 ° C., for example, is reduced in temperature to about 900 ° C. and guided to the waste heat boiler 18. The air heated by the heat exchange in the high temperature air heater 12 is guided to the thermal decomposition reactor 4 via the conduit 13 and passes through the heating pipe in the thermal decomposition reactor 4 (not shown). As a result, this hot air becomes a heat source for the above-mentioned thermal decomposition. The high-temperature air that has passed through this heating pipe and has been cooled to some extent is guided to the conduit 14 and passes through the above-mentioned heating pipe in the heater 1 (not shown) and serves as a degassing heat source for chlorine. The air exiting the heater 1 is conduit 15
And is returned to and heated by the high temperature air heater 12. In addition,
A conduit 19 is provided between the conduit 13 and the conduit 14, and a valve 20 is arranged in the conduit 19 to introduce a part of the hot air into the hot air heat exchanger 12 and the rest directly into the heater 1. It is possible to do.
【００１６】廃熱ボイラ１８は高温空気加熱器１２を介
して導入された燃焼排ガスとの熱交換により高温蒸気を
得るものである。廃熱ボイラ１８に燃焼排ガスとともに
流れ込んだ灰などの一部はこの熱交換の過程で廃熱ボイ
ラ１８の下部２１に落下する。この熱交換後の燃焼排ガ
スは集塵機２２に導入されて残りの灰も除去される。集
塵機２２から排出される排ガスは脱硫塔２３で脱硫処理
された後、煙突２４から排出される。一方、廃熱ボイラ
１８の下部２１に落下した灰と、集塵機２２で除去され
た灰は、フィーダなどの搬送装置２５により燃焼装置８
に戻される。これにより、溶融スラグ化されなかった一
部の灰は、燃焼装置８に循環されることによって溶融ス
ラグ化される。廃熱ボイラ１８で得た高温蒸気は例えば
導管２６でタービン２７に導入し発電に用いられる。The waste heat boiler 18 obtains high temperature steam by exchanging heat with the combustion exhaust gas introduced through the high temperature air heater 12. Part of the ash and the like that have flown into the waste heat boiler 18 together with the combustion exhaust gas falls to the lower portion 21 of the waste heat boiler 18 during this heat exchange process. The combustion exhaust gas after the heat exchange is introduced into the dust collector 22 to remove the remaining ash. The exhaust gas discharged from the dust collector 22 is desulfurized by the desulfurization tower 23 and then discharged from the chimney 24. On the other hand, the ash that has dropped to the lower portion 21 of the waste heat boiler 18 and the ash that has been removed by the dust collector 22 are transferred to the combustion device 8 by the transfer device 25 such as a feeder.
Returned to. As a result, a portion of the ash that has not been melted and slagged is slagged by being circulated to the combustion device 8. The high-temperature steam obtained in the waste heat boiler 18 is introduced into the turbine 27 through the conduit 26 and used for power generation.
【００１７】次に、本実施例の廃棄物処理装置の作用に
ついて説明する。上述のとおり、本実施例によれば、廃
棄物を塩素分が脱気しうる温度に加熱するという簡易な
手段で廃棄物から塩素分を脱気できる。したがって、燃
焼装置８から排出される燃焼排ガス中の塩化水素の含有
率は著しく低減される。したがって、たとえ燃焼排ガス
が５００℃を超える高温であっても、廃熱ボイラ８の伝
熱面などの塩化水素による腐食は防止できる。このよう
に塩素分による伝熱面などの腐食の心配がないので、廃
熱ボイラ８に導入する燃焼排ガスの温度を十分に高くで
きるから、熱回収効率、発電効率を向上させることがで
きる。例えば従来は蒸気条件（温度と圧力）を３００
℃、３０気圧程度としていたのを、４００〜５００℃、
５０〜１００気圧程度にすることができる。しかも、燃
焼装置８における燃焼温度は従来と同じ高温の、溶融流
動性のスラグを生成する温度（望ましくは１３００℃程
度）を保持できるから、溶融スラグの生成に支障はな
い。Next, the operation of the waste treatment apparatus of this embodiment will be described. As described above, according to this embodiment, the chlorine content can be degassed from the waste by a simple means of heating the waste to a temperature at which the chlorine content can be degassed. Therefore, the content rate of hydrogen chloride in the combustion exhaust gas discharged from the combustion device 8 is significantly reduced. Therefore, even if the combustion exhaust gas has a high temperature exceeding 500 ° C., it is possible to prevent corrosion of the heat transfer surface of the waste heat boiler 8 due to hydrogen chloride. As described above, since there is no concern about corrosion of the heat transfer surface due to chlorine content, the temperature of the combustion exhaust gas introduced into the waste heat boiler 8 can be made sufficiently high, so that the heat recovery efficiency and the power generation efficiency can be improved. For example, the conventional steam condition (temperature and pressure) is 300.
℃, about 30 atm was 400 ~ 500 ℃,
It can be about 50-100 atm. Moreover, since the combustion temperature in the combustion device 8 can be maintained at the same high temperature as in the conventional case, that is, the temperature at which the melt fluidity slag is generated (preferably about 1300 ° C.), there is no problem in the generation of the molten slag.
【００１８】[0018]
【発明の効果】以上説明した本発明の廃棄物処理方法及
び装置によれば、廃棄物の熱分解生成物をスラグの生成
に支障ない温度で燃焼でき、かつ熱回収効率を高めるこ
とができ、しかも廃熱回収の熱交換器の塩素による腐食
を防止できる。According to the waste treatment method and apparatus of the present invention described above, the thermal decomposition product of waste can be burned at a temperature that does not hinder the production of slag, and the heat recovery efficiency can be improved. Moreover, it is possible to prevent corrosion of the heat exchanger for waste heat recovery due to chlorine.
【図１】本発明の一実施例である廃棄物熱処理装置の系
統図である。FIG. 1 is a system diagram of a waste heat treatment apparatus which is an embodiment of the present invention.
１ 加熱器 ４ 熱分解反応器 ５ 脱塩塔 ７ 不燃物分別設備 ８ 燃焼装置 １２ 高温空気加熱器 １６ 冷却水槽 １８ 廃熱ボイラ ２２ 集塵機 ２３ 脱硫塔 ２４ 煙突 ２７ タービン DESCRIPTION OF SYMBOLS 1 Heater 4 Pyrolysis reactor 5 Desalting tower 7 Incombustible material separation equipment 8 Combustor 12 High temperature air heater 16 Cooling water tank 18 Waste heat boiler 22 Dust collector 23 Desulfurization tower 24 Chimney 27 Turbine
Claims (2)
る工程と、この工程から排出される熱分解ガスを含む熱
分解生成物を、燃焼残渣が溶融スラグ化する温度で燃焼
する工程と、この工程から排出される燃焼排ガスの熱エ
ネルギーを熱交換により回収する工程とを含んでなる廃
棄物処理方法において、 前記熱分解工程の前に前記廃棄物をその廃棄物に含まれ
る塩素分を脱気し得る温度に加熱し、その廃棄物に含ま
れる塩素分を除去する工程を含むことを特徴とする廃棄
物処理方法。1. A step of heating and thermally decomposing a waste containing a combustible material, and a step of combusting a pyrolysis product containing a pyrolysis gas discharged from this step at a temperature at which a combustion residue becomes a molten slag. And a step of recovering the thermal energy of the combustion exhaust gas discharged from this step by heat exchange, the waste treatment method comprising: a step of collecting the chlorine content in the waste before the thermal decomposition step; A method for treating wastes, comprising the step of heating chlorine to a temperature at which it can be degassed, and removing the chlorine content contained in the wastes.
る熱分解装置と、この熱分解装置から排出される熱分解
ガスを含む熱分解生成物を燃焼残渣が溶融スラグ化する
温度で燃焼する燃焼装置と、この燃焼装置から排出され
る燃焼排ガスと熱媒体とを熱交換して熱エネルギーを回
収する熱交換装置とを含んでなる廃棄物処理装置におい
て、 前記熱分解装置に供給する前記廃棄物をその廃棄物に含
まれる塩素分を脱気し得る温度に加熱し、その廃棄物に
含まれる塩素分を除去する前処理装置を設けたことを特
徴とする廃棄物処理装置。2. A thermal decomposition device for heating and thermally decomposing waste containing combustible substances, and a temperature at which a combustion residue melts slag into a thermal decomposition product containing thermal decomposition gas discharged from the thermal decomposition device. A waste treatment device comprising a combusting combustion device and a heat exchange device for exchanging heat between a combustion exhaust gas discharged from the combustion device and a heat medium, and supplying the heat decomposition device to the thermal decomposition device. A waste treatment apparatus comprising a pretreatment device for heating the waste to a temperature at which chlorine contained in the waste can be degassed and removing the chlorine contained in the waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19727393A JPH0755121A (en) | 1993-08-09 | 1993-08-09 | Method and device for processing waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19727393A JPH0755121A (en) | 1993-08-09 | 1993-08-09 | Method and device for processing waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0755121A true JPH0755121A (en) | 1995-03-03 |
Family
ID=16371728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19727393A Pending JPH0755121A (en) | 1993-08-09 | 1993-08-09 | Method and device for processing waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755121A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1054529A (en) * | 1996-08-14 | 1998-02-24 | Mitsui Eng & Shipbuild Co Ltd | High temperature air heater |
| US9851100B2 (en) | 2006-03-10 | 2017-12-26 | Pyropure Limited | Waste treatment apparatus and method |
-
1993
- 1993-08-09 JP JP19727393A patent/JPH0755121A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1054529A (en) * | 1996-08-14 | 1998-02-24 | Mitsui Eng & Shipbuild Co Ltd | High temperature air heater |
| US9851100B2 (en) | 2006-03-10 | 2017-12-26 | Pyropure Limited | Waste treatment apparatus and method |
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