JPH06233999A - Treatment of public sewage sludge cake and device therefor - Google Patents
Treatment of public sewage sludge cake and device thereforInfo
- Publication number
- JPH06233999A JPH06233999A JP5046009A JP4600993A JPH06233999A JP H06233999 A JPH06233999 A JP H06233999A JP 5046009 A JP5046009 A JP 5046009A JP 4600993 A JP4600993 A JP 4600993A JP H06233999 A JPH06233999 A JP H06233999A
- Authority
- JP
- Japan
- Prior art keywords
- sewage sludge
- sludge cake
- coke
- coke dry
- public sewage
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Treatment Of Sludge (AREA)
- Coke Industry (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、公共下水処理施設よ
り排出される公共下水汚泥ケーキを、コークス乾式消火
設備で焼却処理する方法および装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for incinerating public sewage sludge cake discharged from a public sewage treatment facility in a coke dry fire extinguishing facility.
【０００２】[0002]
【従来の技術】我が国においては、河川の水質汚染防止
等環境に対する規制が厳しくなったことも相まって、市
町村での下水道の整備充実が進められており、その結
果、下水処理施設から排出される下水汚泥ケーキが増加
傾向にある。一方、各市町村では、下水汚泥ケーキの最
終処分地確保が年々困難となってきている情勢の下で
は、下水汚泥ケーキの焼却は極めて減量効果が大きな処
理法であって、不可欠の下水汚泥ケーキ処理プロセスと
なっている。また、下水汚泥ケーキの焼却は、結果的に
質的な著しい処理効果も期待できる。生成される灰は、
安全性、安定性が著しく向上しており、投棄のみならず
再利用を含めた処分を容易とする。2. Description of the Related Art In Japan, sewage discharged from sewage treatment facilities is being improved as a result of the improvement of sewerage systems in cities, towns and villages due to stricter environmental regulations such as prevention of water pollution in rivers. Sludge cake is on the rise. On the other hand, in each municipality, it is becoming difficult to secure the final disposal site for sewage sludge cakes year by year, and incineration of sewage sludge cakes is a treatment method with an extremely large weight reduction effect. Has become a process. In addition, incineration of sewage sludge cake can be expected to result in a significant qualitative treatment effect. The ash produced is
The safety and stability have been remarkably improved, facilitating not only dumping but also disposal including reuse.
【０００３】しかしながら、下水汚泥ケーキの焼却は、
燃焼炉を設置する必要があり、設備費用および消費エネ
ルギーの面から設置困難な場合がある。また、下水汚泥
ケーキの焼却炉の設置には、地元住民の強い反対にあっ
て設置場所を確保できない場合もある。このため、最近
では、下水汚泥ケーキ発生量に対して処理設備の能力が
全く追いつけない状況にある。このため、現状の対策と
しては、市町村の近辺および遠隔地において埋設処理が
行われているが、埋立地の量、環境問題、輸送費用等か
ら限界がある。However, incineration of sewage sludge cake
It is necessary to install a combustion furnace, which may be difficult in terms of equipment cost and energy consumption. In addition, there is a case where it is not possible to secure the installation site due to strong opposition from local residents when installing an incinerator for sewage sludge cake. For this reason, recently, the capacity of the treatment equipment cannot catch up with the amount of sewage sludge cake generated. For this reason, as the current measures, burial treatment is being performed near municipalities and in remote areas, but there is a limit due to the amount of landfill, environmental problems, transportation costs, etc.
【０００４】一方、工場排水の活性汚泥処理設備から排
出される余剰汚泥の処理方法としては、コークス乾式消
火設備の冷却塔内に、冷却塔下部またはガス循環路から
脱水処理した汚泥ケーキを吹き込んで処理する方法（特
公昭６１−５９８００号公報）が提案されている。ま
た、コークス乾式消火設備においては、空気およびＮ2
の少なくとも一方に水を加えたガスをプリチャンバー内
へその外壁部から供給し、赤熱コークスとの反応により
ＣＯ、Ｈ2を多く含むガスを生成し、このガスをプリチ
ャンバーの上部から導管によりガスダクト内の循環ガス
と合流する方法（特開昭５９−７５９８１号公報）、冷
却塔の天井部からプリチャンバー内の赤熱コークスに注
水し、該注水により生成した水性ガス化反応ガスをプリ
チャンバーから吸引排気しつつ循環ガスにより冷却する
方法（特開平３−８６７８８号公報）等が提案されてい
る。On the other hand, as a method for treating surplus sludge discharged from the activated sludge treatment equipment of factory wastewater, the dehydrated sludge cake is blown into the cooling tower of the coke dry fire extinguishing equipment from the lower part of the cooling tower or the gas circulation path. A treatment method (Japanese Patent Publication No. 61-59800) has been proposed. In the coke dry fire extinguishing equipment, air and N 2
Of at least one of them is supplied to the inside of the pre-chamber from the outer wall of the pre-chamber, a gas containing a large amount of CO and H 2 is produced by the reaction with the red hot coke, and the gas is ducted from the upper part of the pre-chamber by a conduit A method of merging with the circulating gas in the inside (Japanese Patent Laid-Open No. 59-75981), water is poured into the red hot coke in the pre-chamber from the ceiling part of the cooling tower, and the water-gasification reaction gas generated by the water injection is sucked from the pre-chamber. A method of cooling with circulating gas while exhausting (Japanese Patent Laid-Open No. 3-86788) has been proposed.
【０００５】[0005]
【発明が解決しようとする課題】上記特公昭６１−５９
８００号公報に開示の方法は、工場排水の活性汚泥処理
設備から排出される脱水処理した汚泥ケーキをコークス
乾式消火設備の冷却塔下部またはガス循環路から吹き込
んで処理するものであって、公共の下水処理施設から排
出される下水汚泥ケーキを処理するものではない。すな
わち、鉄鋼、金属、窯業などの工場排水の活性汚泥処理
設備から排出される余剰汚泥は、無機性汚泥であるのに
対し、公共の下水処理施設から排出される下水汚泥ケー
キは、有機性汚泥であって、前記余剰汚泥に比較してア
ンモニア、硫化水素、メタン等が発生し、悪臭を周囲近
辺に放散するため、防臭対策を講じなければ、コークス
乾式消火設備で処理することはできない。また、特開昭
５９−７５９８１号公報、特開平３−８６７８８号公報
に開示の方法は、プリチャンバー内の赤熱コークスと水
とを水性反応させ、ＣＯ、Ｈ2を多く含むガスを生成さ
せるもので、公共の下水処理施設から排出される下水汚
泥ケーキを処理するものではない。[Problems to be Solved by the Invention] Japanese Patent Publication No. 61-59
The method disclosed in Japanese Unexamined Patent Publication No. 800 is for treating a dehydrated sludge cake discharged from an activated sludge treatment facility of factory wastewater by injecting it from a lower part of a cooling tower of a coke dry fire extinguisher or a gas circulation passage. It does not treat sewage sludge cake discharged from sewage treatment facilities. That is, the surplus sludge discharged from the activated sludge treatment facility of factory wastewater such as steel, metal, and ceramic industry is inorganic sludge, whereas the sewage sludge cake discharged from public sewage treatment facilities is organic sludge. However, compared with the excess sludge, ammonia, hydrogen sulfide, methane, etc. are generated, and a bad odor is diffused in the vicinity, so that it cannot be treated in the coke dry fire extinguishing equipment unless deodorizing measures are taken. Further, the methods disclosed in JP-A-59-75981 and JP-A-3-86788 are those in which the red hot coke in the pre-chamber and water are allowed to undergo an aqueous reaction to produce a gas containing a large amount of CO and H 2. Therefore, it does not treat sewage sludge cake discharged from public sewage treatment facilities.
【０００６】この発明の目的は、下水汚泥ケーキから発
生するアンモニア、硫化水素、メタン等の悪臭を周囲近
辺に放散することなく処理できる公共下水汚泥ケーキの
処理方法および装置を提供することにある。An object of the present invention is to provide a method and an apparatus for treating public sewage sludge cake, which can treat offensive odors such as ammonia, hydrogen sulfide and methane generated from the sewage sludge cake without being emitted to the surrounding area.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記目的
を達成すべく種々試験検討を重ねた。その結果、公共下
水処理施設から排出される下水汚泥ケーキをコークス乾
式消火設備のプリチャンバーの赤熱コークス上面に投入
し、焼却処理することによって、下水汚泥ケーキの蒸発
した水分が水性ガス化反応して可燃性のＣＯ、Ｈ2を発
生し、廃熱ボイラーに導かれる煙道中で希釈空気と反応
して燃焼し、高温ガスとなって廃熱ボイラーで熱回収さ
れる。一方、赤熱コークスと接触して含有水分が殆ど蒸
発した下水汚泥ケーキは、大部分が塊コークスに粉状で
付着して高炉に送られて投入され、最終的に鉱滓スラグ
となる。残部は循環ガスに導かれてサイクロンでコーク
ス粉として回収され、焼結用または鋳物砂の原料とな
る。さらに下水汚泥ケーキから発生するアンモニア、硫
化水素、メタン等は、コークス乾式消火設備内での燃焼
によって極微量なＳＯｘ、ＮＯｘ等になって大気排出さ
れ、一切悪臭を発しないことを見い出し、この発明に到
達した。Means for Solving the Problems The inventors of the present invention have conducted various tests and examinations in order to achieve the above object. As a result, the sewage sludge cake discharged from the public sewage treatment facility was put on the upper surface of the red-hot coke in the pre-chamber of the coke dry fire extinguishing system and incinerated to cause the evaporated water in the sewage sludge cake to undergo a water gasification reaction. Combustible CO and H 2 are generated, and react with the dilution air in the flue that is guided to the waste heat boiler to burn, producing high-temperature gas that is recovered by the waste heat boiler. On the other hand, most of the sewage sludge cake, which is in contact with the red hot coke and has most of the water content evaporated, adheres to the lump coke in the form of powder and is sent to the blast furnace and charged into it, and finally becomes slag slag. The rest is led to the circulating gas and recovered as coke powder by a cyclone, and is used as a raw material for sintering or foundry sand. Furthermore, it was found that ammonia, hydrogen sulfide, methane, etc. generated from the sewage sludge cake become a very small amount of SOx, NOx, etc. by combustion in the coke dry fire extinguishing equipment and are discharged into the atmosphere, and do not emit any foul odor. Reached
【０００８】すなわちこの発明は、公共下水処理施設よ
り排出された公共下水汚泥ケーキを焼却処理する方法に
おいて、コークス乾式消火設備のプリチャンバーのコー
クス上面に公共下水汚泥ケーキを投入し、焼却処理する
ことを特徴とする公共下水汚泥ケーキの処理方法であ
る。That is, according to the present invention, in a method for incinerating public sewage sludge cake discharged from a public sewage treatment facility, the public sewage sludge cake is put on the upper surface of the coke of the pre-chamber of the coke dry fire extinguishing equipment and incinerated. Is a method for treating public sewage sludge cake.
【０００９】また、公共下水処理施設より排出された公
共下水汚泥ケーキの焼却処理装置において、コークス乾
式消火設備の近辺に設けた下部に切出機を有し、開閉自
在の密閉上蓋を有する公共下水汚泥ケーキの貯留槽と、
該貯留槽下端とコークス乾式消火設備のプリチャンバー
の装入蓋とを高圧輸送ポンプを介して連結する配管系
と、前記貯留槽の密閉上蓋とコークス乾式消火設備の煙
道とをブロワを介して連結する配管系とからなることを
特徴とする公共下水汚泥ケーキの処理装置である。Further, in an incinerator for incinerating public sewage sludge cake discharged from a public sewage treatment facility, a public sewage system having a slicing machine at a lower part provided in the vicinity of a coke dry fire extinguishing system and having a freely openable and closed upper lid. A sludge cake storage tank,
A piping system that connects the lower end of the storage tank and the charging lid of the pre-chamber of the coke dry fire extinguisher via a high-pressure transport pump, the closed upper lid of the storage tank and the flue of the coke dry fire extinguisher via a blower. A treatment device for public sewage sludge cake, characterized in that it comprises a piping system to be connected.
【００１０】[0010]
【作用】この発明においては、コークス乾式消火設備の
プリチャンバーのコークス上面に公共下水汚泥ケーキを
投入し、焼却処理するから、下水汚泥ケーキの蒸発した
水分が水性ガス化反応して可燃性のＣＯ、Ｈ2を発生
し、廃熱ボイラーに導かれる煙道中で希釈空気と反応し
て燃焼し、高温ガスとなって廃熱ボイラーで熱回収され
る。一方、赤熱コークスと接触して含有水分が殆ど蒸発
した下水汚泥ケーキは、大部分が塊コークスに粉状で付
着して高炉に送られて投入され、最終的に鉱滓スラグと
なる。残部は循環ガスに導かれてサイクロンでコークス
粉として回収され、焼結用または鋳物砂の原料となる。
一方、下水汚泥ケーキから発生するアンモニア、硫化水
素、メタン等は、コークス乾式消火設備内での燃焼によ
って極微量なＳＯｘ、ＮＯｘ等になって大気排出され、
一切悪臭を発生しない。In the present invention, the public sewage sludge cake is put on the upper surface of the coke of the pre-chamber of the coke dry fire extinguisher and incinerated. Therefore, the evaporated water in the sewage sludge cake undergoes a water gasification reaction to generate flammable CO. , H 2 are generated and react with the dilution air in the flue that is guided to the waste heat boiler and burned to become high-temperature gas, which is recovered by the waste heat boiler. On the other hand, most of the sewage sludge cake, which is in contact with the red hot coke and has most of the water content evaporated, adheres to the lump coke in the form of powder and is sent to the blast furnace and charged into it, and finally becomes slag slag. The rest is led to the circulating gas and recovered as coke powder by a cyclone, and is used as a raw material for sintering or foundry sand.
On the other hand, ammonia, hydrogen sulfide, methane, etc. generated from the sewage sludge cake are burned in the coke dry fire extinguishing equipment to become extremely small amounts of SOx, NOx, etc., and discharged into the atmosphere.
No odor is generated.
【００１１】この発明の処理装置は、コークス乾式消火
設備の近辺に設けた下部に切出機を有し、開閉自在の密
閉上蓋を有する公共下水汚泥ケーキの貯留槽と、該貯留
槽下端とコークス乾式消火設備のプリチャンバーの装入
蓋とを高圧輸送ポンプを介して連結する配管系と、前記
貯留槽の密閉上蓋とコークス乾式消火設備の煙道とをブ
ロワを介して連結する配管系とから構成されるから、コ
ークス乾式消火設備の近辺に設けた貯留槽への公共下水
汚泥ケーキ投入時以外は、貯留槽が密閉上蓋で密閉さ
れ、密閉上蓋とコークス乾式消火設備の煙道とをブロワ
を介して連結する配管系によって、公共下水汚泥ケーキ
から発生する悪臭を吸引してコークス乾式消火設備の煙
道へ希釈用空気として導入でき、公共下水汚泥ケーキの
貯留槽からの悪臭を近辺に放散させることはない。ま
た、貯留槽に貯留された公共下水汚泥ケーキは、下部の
切出機で切り出され、高圧輸送ポンプによりコークス乾
式消火設備のプリチャンバーの装入蓋まで配管輸送さ
れ、プリチャンバーのコークス上面に投入されて焼却処
理される。The treatment apparatus of the present invention has a storage tank for the public sewage sludge cake, which has a cutting machine provided in the lower portion near the coke dry fire extinguishing equipment and has an openable and closed upper lid, and a lower end of the storage tank and coke. From the piping system that connects the pre-chamber charging lid of the dry fire extinguishing equipment via a high-pressure transport pump, and the piping system that connects the closed top lid of the storage tank and the flue of the coke dry fire extinguishing equipment via a blower. Since it is configured, the storage tank is closed with a sealing top lid except when the public sewage sludge cake is put into the storage tank installed near the coke dry fire extinguishing equipment, and the sealing top lid and the flue of the coke dry fire extinguishing equipment are provided with a blower. Through the piping system connected via the sewage sludge, the bad odor generated from the public sewage sludge cake can be sucked and introduced into the flue of the coke dry fire extinguisher as dilution air, and the odor from the storage tank of the public sewage sludge cake can be removed. It does not dissipate the sides. In addition, the public sewage sludge cake stored in the storage tank is cut out by the cutting machine at the bottom, piped to the charging lid of the prechamber of the coke dry fire extinguishing equipment by the high-pressure transport pump, and put on the upper surface of the coke of the prechamber. It is then incinerated.
【００１２】[0012]
実施例１ 以下にこの発明の詳細を実施の一例を示す図１ないし図
３に基いて説明する。図１はこの発明の下水汚泥ケーキ
処理設備の系統図、図２は下水汚泥ケーキ切出し部をモ
ーター側から見た側断面図、図３は切出し機のスクリュ
ー断面図である。図１ないし図３において、１は図示し
ない公共下水処理施設の最終工程で遠心分離機またはフ
ィルタープレスによって水分７０〜８０％に脱水された
下水汚泥ケーキを、コークス乾式消火設備の近辺に設け
た下水汚泥ケーキ処理設備の貯留槽２まで輸送する輸送
トラック、３は貯留槽２の上面を密閉する密閉上蓋で、
シリンダー４を操作することによって密閉上蓋３が開閉
する。５は密閉上蓋３で密閉された貯留槽２内で下水汚
泥ケーキから発生する臭気を吸引する吸引フアンで、密
閉上蓋３とフレキシブルチューブ６を介して連結され、
吸引フアン５の吐出側は配管７を介してコークス乾式消
火設備の煙道８内への希釈空気供給管９と連結され、フ
アン５を作動すれば貯留槽２内で下水汚泥ケーキから発
生する臭気がコークス乾式消火設備の煙道８内への希釈
空気として吹込まれるよう構成する。Embodiment 1 Details of the present invention will be described below with reference to FIGS. 1 to 3 showing an embodiment. FIG. 1 is a system diagram of a sewage sludge cake treatment facility of the present invention, FIG. 2 is a side sectional view of a sewage sludge cake cutting portion viewed from a motor side, and FIG. 3 is a screw sectional view of a cutting machine. 1 to 3, reference numeral 1 denotes a sewage sludge cake, which has been dehydrated to have a water content of 70 to 80% by a centrifuge or a filter press in the final step of a public sewage treatment facility (not shown), provided near a coke dry fire extinguishing facility. A transportation truck 3 for transporting to the storage tank 2 of the sludge cake treatment facility, 3 is a closed upper lid for sealing the upper surface of the storage tank 2,
The closed upper lid 3 is opened and closed by operating the cylinder 4. 5 is a suction fan for sucking the odor generated from the sewage sludge cake in the storage tank 2 which is closed by the closed upper lid 3, and is connected to the closed upper lid 3 through the flexible tube 6.
The discharge side of the suction fan 5 is connected via a pipe 7 to a dilution air supply pipe 9 into the flue 8 of the coke dry fire extinguishing equipment, and when the fan 5 is operated, the odor generated from the sewage sludge cake in the storage tank 2 Is blown as dilution air into the flue 8 of the coke dry fire extinguisher.
【００１３】１０は貯留槽２の下部に設置した下水汚泥
ケーキの切出機、１１は切出機１０の駆動用モーター
で、切出機１０の駆動用モーター１１を起動すれば、切
出機１０のギアー１２が回転し、相対するスクリュー１
３が図３に示すとおり回転し、貯留槽２に貯留された下
水汚泥ケーキ１４が一定量切出される。１５は切出機１
０で切出された下水汚泥ケーキ１４を高圧輸送する油圧
プランジャーポンプ、１６は油圧プランジャーポンプ１
５を作動させる油圧ユニット、１７は油圧プランジャー
ポンプ１５の吐出側に連結した高圧配管で、コークス乾
式消火設備のプリチャンバー１８の装入蓋１９とフレキ
シブルチューブ２０を介して連結され、油圧ユニット１
６を作動して油圧プランジャーポンプ１５を駆動すれ
ば、切出機１０で切出された下水汚泥ケーキ１４は油圧
プランジャーポンプ１５により高圧輸送され、高圧配管
１７、フレキシブルチューブ２０を介してコークス乾式
消火設備のプリチャンバー１８の装入蓋１９からプリチ
ャンバー１８内の赤熱コークス上面に添加されるよう構
成されている。なお、２１は下水汚泥ケーキ１４の投入
量監視のための高圧配管１６に設けた流量計である。Reference numeral 10 is a sewage sludge cake cutting machine installed in the lower part of the storage tank 2, 11 is a driving motor of the cutting machine 10, and if the driving motor 11 of the cutting machine 10 is activated, the cutting machine is cut out. The gear 12 of 10 rotates and the opposite screw 1
3 rotates as shown in FIG. 3, and a certain amount of the sewage sludge cake 14 stored in the storage tank 2 is cut out. 15 is a cutting machine 1
A hydraulic plunger pump for high-pressure transportation of the sewage sludge cake 14 cut out at 0, 16 is a hydraulic plunger pump 1
5 is a hydraulic unit for operating 5, and 17 is a high-pressure pipe connected to the discharge side of the hydraulic plunger pump 15, which is connected to the charging lid 19 of the pre-chamber 18 of the coke dry fire extinguishing equipment via the flexible tube 20.
6 is driven to drive the hydraulic plunger pump 15, the sewage sludge cake 14 cut out by the cutting machine 10 is transported at high pressure by the hydraulic plunger pump 15, and coke is passed through the high pressure pipe 17 and the flexible tube 20. It is configured to be added to the upper surface of the red hot coke in the pre-chamber 18 from the charging lid 19 of the pre-chamber 18 of the dry fire extinguishing equipment. Reference numeral 21 is a flow meter provided in the high-pressure pipe 16 for monitoring the input amount of the sewage sludge cake 14.
【００１４】２２はコークス乾式消火設備のプリチャン
バー１８に接続する冷却室、２３は冷却室２２の下部に
設けた循環冷却ガス吹込み装置、２４は冷却室２１の下
端に設けたコークス切出し装置である。循環冷却ガス吹
込み装置２３から吹込まれた循環冷却ガスは、冷却室２
２を下降する赤熱コークスと接触して熱交換し、冷却室
２２とプリチャンバー１８の境界部周囲の小煙道からプ
リチャンバー１８外周の円環煙道２５に至り、煙道８で
一次除塵されたのち廃熱ボイラー２６で熱回収され、サ
イクロン２７で再度除塵されたのちブロワ２８により吸
引されて再び冷却室２２の循環冷却ガス吹込み装置２３
から吹込まれる。一方、冷却室２２内を降下する間に循
環冷却ガス吹込み装置２３から吹込まれた循環冷却ガス
と熱交換して冷却されたコークスは、冷却室２２の下端
に設けたコークス切出し装置２４で切出され、高炉へ搬
送されるよう構成されている。Reference numeral 22 is a cooling chamber connected to the pre-chamber 18 of the coke dry fire extinguishing equipment, 23 is a circulating cooling gas blowing device provided at the lower portion of the cooling chamber 22, and 24 is a coke cutting device provided at the lower end of the cooling chamber 21. is there. The circulating cooling gas blown from the circulating cooling gas blowing device 23 is supplied to the cooling chamber 2
It contacts with the red hot coke descending 2 and exchanges heat, and reaches from the small flue around the boundary between the cooling chamber 22 and the prechamber 18 to the circular flue 25 on the outer circumference of the prechamber 18, and the dust is primarily removed by the flue 8. After that, heat is recovered by the waste heat boiler 26, dust is removed again by the cyclone 27, then sucked by the blower 28, and again the circulating cooling gas blowing device 23 in the cooling chamber 22.
Blown in from. On the other hand, the coke cooled by exchanging heat with the circulating cooling gas blown from the circulating cooling gas blowing device 23 while descending in the cooling chamber 22 is cut by a coke cutting device 24 provided at the lower end of the cooling chamber 22. It is configured to be taken out and transferred to the blast furnace.
【００１５】上記のとおり構成したことによって、図示
しない公共下水処理施設において輸送トラック１に積載
された下水汚泥ケーキは、貯留槽２まで搬送され、シリ
ンダー４を操作して密閉上蓋３を開放し、輸送トラック
１の荷台を傾転させることにより貯留槽２内に投入さ
れ、再びシリンダー４を操作して密閉上蓋３が密閉され
る。貯留槽２内の下水汚泥ケーキ１４から発生する悪臭
は、吸引フアン５を起動することによって、フレキシブ
ルチューブ６、配管７を介して希釈空気供給管９から煙
道８内に希釈用空気として吹込まれる。貯留槽２から下
水汚泥ケーキ１４を切出す場合は、コークス乾式消火設
備のプリチャンバー１８での下水汚泥ケーキ１４投入、
水性ガス化反応準備完了信号により、駆動用モーター１
１、油圧ユニット１６が起動する。駆動用モーター１１
の起動により切出機１０のギアー１２が回転して相対す
るスクリュー１３、１３が回転して貯留槽２内の下水汚
泥ケーキ１４を一定量切出す。With the above construction, the sewage sludge cake loaded on the transport truck 1 in a public sewage treatment facility (not shown) is conveyed to the storage tank 2, and the cylinder 4 is operated to open the closed upper lid 3. By tilting the loading platform of the transportation truck 1, the transportation truck 1 is loaded into the storage tank 2, and the cylinder 4 is operated again to seal the sealing upper lid 3. The bad odor generated from the sewage sludge cake 14 in the storage tank 2 is blown as dilution air into the flue 8 from the dilution air supply pipe 9 via the flexible tube 6 and the pipe 7 by activating the suction fan 5. Be done. When cutting out the sewage sludge cake 14 from the storage tank 2, the sewage sludge cake 14 is charged in the pre-chamber 18 of the coke dry fire extinguishing equipment,
Drive motor 1 by the water gasification reaction ready signal
1. The hydraulic unit 16 is activated. Drive motor 11
The gear 12 of the slicing machine 10 is rotated by the activation of the above, and the screws 13, 13 facing each other are rotated to cut out a certain amount of the sewage sludge cake 14 in the storage tank 2.
【００１６】切出された下水汚泥ケーキ１４は、下部に
設置した油圧プランジャーポンプ１５によって高圧配管
１７、フレキシブルチューブ２０を介してコークス乾式
消火設備のプリチャンバー１８の装入蓋１９からプリチ
ャンバー１８内の赤熱コークス上面に添加される。プリ
チャンバー１８内の赤熱コークス上面に添加された下水
汚泥ケーキ１４は、水分が蒸発して水性ガス化反応によ
りＣＯ、Ｈ2を発生しする。発生したＣＯ、Ｈ2は、冷却
室２２内に吹込まれて赤熱コークスとの熱交換により高
温となった循環冷却ガスと共に、円環煙道２５から煙道
８を介して廃熱ボイラー２６に導かれるが、煙道８にお
いて希釈空気供給管９から吹込まれる貯留槽２内の下水
汚泥ケーキ１４から発生する悪臭を含む空気によって燃
焼し、さらに高温となって廃熱ボイラー２６に導かれ、
熱回収される。The cut sewage sludge cake 14 is fed from the charging lid 19 of the pre-chamber 18 of the coke dry fire extinguishing equipment to the pre-chamber 18 through the high-pressure pipe 17 and the flexible tube 20 by the hydraulic plunger pump 15 installed at the lower part. It is added to the top of the red hot coke inside. The sewage sludge cake 14 added to the upper surface of the red hot coke in the pre-chamber 18 generates CO and H 2 due to water vaporization reaction due to evaporation of water. The generated CO and H 2 are introduced into the waste heat boiler 26 from the circular flue 25 through the flue 8 together with the circulating cooling gas which has been blown into the cooling chamber 22 and has become hot due to heat exchange with the red hot coke. However, it is burned by the air containing the bad odor generated from the sewage sludge cake 14 in the storage tank 2 which is blown from the dilution air supply pipe 9 in the flue 8 and is further heated to be guided to the waste heat boiler 26,
Heat is recovered.
【００１７】一方、プリチャンバー１８内の赤熱コーク
ス上面に添加され水分が殆ど蒸発した下水汚泥ケーキ
は、大部分がコークス塊に粉状で付着し、冷却室２２の
下端のコークス切出し装置２４で切出され、高炉送りコ
ンベア２９によって高炉に投入され、最終的に鉱滓スラ
グとなる。また、水分が殆ど蒸発した下水汚泥ケーキの
残部は、循環冷却ガスと共にサイクロン２７に導かれ、
コークス粉として分離回収され、焼結用あるいは鋳物砂
原料となる。上記下水汚泥ケーキ１４は、アンモニア、
硫化水素、メタン等の悪臭を発生するが、コークス乾式
消火設備のプリチャンバー１８内の赤熱コークス上面へ
の添加による焼却によって、酸化反応してＳＯｘ、ＮＯ
ｘ等になるが多量の循環冷却ガスにより希釈されるた
め、極微量となって大気中に放出される。このため、一
切悪臭を発生することはない。On the other hand, most of the sewage sludge cake which is added to the upper surface of the red hot coke in the pre-chamber 18 and in which most of the water has evaporated adheres to the coke lump in powder form and is cut by the coke cutting device 24 at the lower end of the cooling chamber 22. The slag is taken out and put into the blast furnace by the blast furnace feed conveyor 29, and finally becomes slag slag. Further, the remaining portion of the sewage sludge cake in which most of the water has evaporated is guided to the cyclone 27 together with the circulating cooling gas,
It is separated and collected as coke powder and used as raw material for sintering or foundry sand. The sewage sludge cake 14 is ammonia,
Although it produces a foul odor of hydrogen sulfide, methane, etc., it burns due to addition to the upper surface of the red hot coke in the pre-chamber 18 of the coke dry fire extinguishing equipment, resulting in an oxidation reaction and SOx, NO.
Although it becomes x and the like, it is diluted with a large amount of the circulating cooling gas, so that it becomes an extremely small amount and is released into the atmosphere. Therefore, no odor is generated.
【００１８】実施例２ 実施例１の下水汚泥ケーキ処理装置を使用し、表１に示
す正常の公共下水処理施設から排出された下水汚泥ケー
キを、コークス処理能力１２０ｔ／Ｈｒのコークス乾式
消火設備のプリチャンバーの赤熱コークス上面に１．４
ｔ／Ｈｒで添加し、燃焼処理した本発明法と、下水汚泥
ケーキを添加しなかった従来法１の場合、下水汚泥ケー
キに替えて水を添加した従来法２の場合のそれぞれにつ
いて、比較試験を実施した。その結果を表２に示す。ま
た、コークス乾式消火設備から排出される循環余剰ガス
の成分組成を調査し、下水汚泥ケーキを添加した本発明
法と水を添加した従来法２の場合を比較して表３に示
す。なお、表１中でｐＨ以外の単位のないものはすべて
ｐｐｍである。Example 2 Using the sewage sludge cake treating apparatus of Example 1, the sewage sludge cake discharged from the normal public sewage treatment facility shown in Table 1 was treated with a coke dry fire extinguisher having a coke treatment capacity of 120 t / Hr. 1.4 on top of the red-hot coke in the pre-chamber
A comparative test was conducted for each of the method of the present invention, which was added at t / Hr and burned, and the conventional method 1 in which the sewage sludge cake was not added, and the conventional method 2 in which water was added instead of the sewage sludge cake. Was carried out. The results are shown in Table 2. Table 3 compares the composition of the circulating surplus gas discharged from the coke dry fire extinguishing equipment and compares the method of the present invention with the addition of the sewage sludge cake and the conventional method 2 with the addition of water. In Table 1, all the units having no unit other than pH are ppm.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】表１に示す成分組成の公共下水汚泥ケーキ
は、コークス乾式消火設備のプリチャンバー内赤熱コー
クス上面に添加され、コークス乾式消火設備内での燃焼
酸化反応により殆どが粉状で塊コークスに付着し、コー
クスとして高炉へ搬送された。また、公共下水汚泥ケー
キ投入開始後の調査では、塊コークスの強度は公共下水
汚泥ケーキ投入開始前と変わらなかった。さらに、表２
に示すとおり、下水汚泥ケーキを添加した本発明法の場
合は、水添加の従来法２とほぼ同様のボイラー回収熱量
および余剰ガス熱量が得られた。また、表３に示すとお
り、下水汚泥ケーキから発生する悪臭成分を煙道で希釈
空気として導入し、燃焼せしめても、下水汚泥ケーキか
ら発生する悪臭成分が微量で、コークスから発生する支
配的であるため、下水汚泥ケーキ添加による成分変化は
見られなかった。したがって、下水汚泥ケーキから発生
する悪臭成分の燃焼による大気汚染成分増加は殆どな
い。The public sewage sludge cake having the composition shown in Table 1 was added to the upper surface of the red hot coke in the pre-chamber of the coke dry fire extinguisher, and almost all became powdery and lump coke due to the combustion oxidation reaction in the coke dry fire extinguishing equipment. It adhered and was transferred to the blast furnace as coke. In addition, in the survey after the introduction of the public sewage sludge cake, the strength of the lump coke was the same as before the introduction of the public sewage sludge cake. Furthermore, Table 2
As shown in FIG. 7, in the case of the method of the present invention in which the sewage sludge cake was added, almost the same amount of boiler recovery heat and excess gas heat as in the conventional method 2 of adding water was obtained. Further, as shown in Table 3, even if the malodorous components generated from the sewage sludge cake are introduced as dilution air in the flue and burned, the malodorous components generated from the sewage sludge cake are in a small amount and are dominant in the coke. Therefore, no change was observed in the components due to the addition of the sewage sludge cake. Therefore, there is almost no increase in air pollutant components due to combustion of malodorous components generated from the sewage sludge cake.
【００２３】[0023]
【発明の効果】以上述べたとおり、この発明によれば、
公共下水処理施設から排出される下水汚泥ケーキを、周
辺に悪臭を発散させることなく、焼却処理できると共
に、コークス乾式消火設備における回収熱量を増加で
き、さらに下水汚泥ケーキ焼却による灰分の処理も特に
必要としない等多くの利点を有している。なお、本発明
においては、公共下水処理施設から排出される下水汚泥
ケーキを、単独でコークス乾式消火設備で焼却する場合
について述べたが、工場排水の活性汚泥処理設備からの
余剰汚泥等と混合して処理できることは云うまでもな
い。As described above, according to the present invention,
Sewage sludge cake discharged from public sewage treatment facilities can be incinerated without emitting offensive odors to the surrounding area, the amount of heat recovered by coke dry fire extinguishing equipment can be increased, and ash treatment by sewage sludge cake incineration is also particularly necessary. It does not have many advantages. In the present invention, the sewage sludge cake discharged from the public sewage treatment facility was described as being incinerated by a coke dry fire extinguishing facility alone, but mixed with excess sludge from the activated sludge treatment facility of factory wastewater. It goes without saying that it can be processed.
【図１】この発明の下水汚泥ケーキ処理設備の系統図で
ある。FIG. 1 is a system diagram of a sewage sludge cake treatment facility of the present invention.
【図２】下水汚泥ケーキ切出し部をモーター側から見た
側断面図である。FIG. 2 is a side sectional view of a cut-out portion of sewage sludge cake as seen from the motor side.
【図３】切出し機のスクリュー断面図である。FIG. 3 is a screw cross-sectional view of a cutting machine.
１ 輸送トラック ２ 貯留槽 ３ 密閉上蓋 ４ シリンダー ５ 吸引フアン ６、２０ フレキシブルチューブ ７ 配管 ８ 煙道 ９ 希釈空気供給管 １０ 切出機 １１ 駆動用モーター １２ ギアー １３ スクリュー １４ 下水汚泥ケーキ １５ 油圧プランジャーポンプ １６ 油圧ユニット １７ 高圧配管 １８ プリチャンバー １９ 装入蓋 ２１ 流量計 ２２ 冷却室 ２３ 循環冷却ガス吹込み装置 ２４ コークス切出し装置 ２５ 円環煙道 ２６ 廃熱ボイラー ２７ サイクロン ２８ ブロワ ２９ 高炉送りコンベア 1 Transport Truck 2 Storage Tank 3 Sealed Top 4 Cylinder 5 Suction Fan 6, 20 Flexible Tube 7 Piping 8 Flue 9 Diluting Air Supply Pipe 10 Cutting Machine 11 Drive Motor 12 Gear 13 Screw 14 Sewage Sludge Cake 15 Hydraulic Plunger Pump 16 hydraulic unit 17 high-pressure piping 18 pre-chamber 19 charging lid 21 flow meter 22 cooling chamber 23 circulating cooling gas blowing device 24 coke cutting device 25 annular flue 26 waste heat boiler 27 cyclone 28 blower 29 blast furnace feed conveyor
Claims (2)
水汚泥ケーキを焼却処理する方法において、コークス乾
式消火設備のプリチャンバーのコークス上面に公共下水
汚泥ケーキを投入し、焼却処理することを特徴とする公
共下水汚泥ケーキの処理方法。1. A method for incinerating public sewage sludge cake discharged from a public sewage treatment facility, which comprises injecting the public sewage sludge cake on the upper surface of the coke of a pre-chamber of a coke dry fire extinguisher and incinerating it. How to treat public sewage sludge cake.
水汚泥ケーキの焼却処理装置において、コークス乾式消
火設備の近辺に設けた下部に切出機を有し、開閉自在の
密閉上蓋を有する公共下水汚泥ケーキの貯留槽と、該貯
留槽下端とコークス乾式消火設備のプリチャンバーの装
入蓋とを高圧輸送ポンプを介して連結する配管系と、前
記貯留槽の密閉上蓋とコークス乾式消火設備の煙道とを
ブロワを介して連結する配管系とからなることを特徴と
する公共下水汚泥ケーキの処理装置。2. An incinerator of public sewage sludge cake discharged from a public sewage treatment facility, which has a slicing machine at a lower part provided near a coke dry fire extinguisher and has a closed upper lid that can be opened and closed. A pipe system for connecting a sludge cake storage tank, a lower end of the storage tank and a charging lid of a pre-chamber of a coke dry fire extinguisher via a high-pressure transport pump, a closed upper lid of the storage tank, and smoke of the coke dry fire extinguisher. An apparatus for treating public sewage sludge cake, comprising a piping system that connects the road with a blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5046009A JP2789988B2 (en) | 1993-02-09 | 1993-02-09 | Public sewage sludge cake processing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5046009A JP2789988B2 (en) | 1993-02-09 | 1993-02-09 | Public sewage sludge cake processing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06233999A true JPH06233999A (en) | 1994-08-23 |
| JP2789988B2 JP2789988B2 (en) | 1998-08-27 |
Family
ID=12735071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5046009A Expired - Fee Related JP2789988B2 (en) | 1993-02-09 | 1993-02-09 | Public sewage sludge cake processing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2789988B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003035799A1 (en) * | 2001-10-19 | 2003-05-01 | Nippon Steel Corporation | Method of processing biomass in coke dry quenching equipment |
| JP2009248038A (en) * | 2008-04-09 | 2009-10-29 | Mhi Environment Engineering Co Ltd | Method and system for treating sludge |
| CN102679371A (en) * | 2012-06-11 | 2012-09-19 | 浙江大学 | Sludge drying and incineration device and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6159800A (en) * | 1984-08-31 | 1986-03-27 | 株式会社東芝 | Mounting structure of transmission controller in trestle |
| JPS6253392A (en) * | 1985-08-30 | 1987-03-09 | Sumikin Coke Co Ltd | Method of dry quenching of coke |
-
1993
- 1993-02-09 JP JP5046009A patent/JP2789988B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6159800A (en) * | 1984-08-31 | 1986-03-27 | 株式会社東芝 | Mounting structure of transmission controller in trestle |
| JPS6253392A (en) * | 1985-08-30 | 1987-03-09 | Sumikin Coke Co Ltd | Method of dry quenching of coke |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003035799A1 (en) * | 2001-10-19 | 2003-05-01 | Nippon Steel Corporation | Method of processing biomass in coke dry quenching equipment |
| JP2009248038A (en) * | 2008-04-09 | 2009-10-29 | Mhi Environment Engineering Co Ltd | Method and system for treating sludge |
| CN102679371A (en) * | 2012-06-11 | 2012-09-19 | 浙江大学 | Sludge drying and incineration device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2789988B2 (en) | 1998-08-27 |
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