JP3833697B1 - Method and system for managing basicity and heavy metal concentration of incinerated ash - Google Patents

Method and system for managing basicity and heavy metal concentration of incinerated ash Download PDF

Info

Publication number
JP3833697B1
JP3833697B1 JP2006103334A JP2006103334A JP3833697B1 JP 3833697 B1 JP3833697 B1 JP 3833697B1 JP 2006103334 A JP2006103334 A JP 2006103334A JP 2006103334 A JP2006103334 A JP 2006103334A JP 3833697 B1 JP3833697 B1 JP 3833697B1
Authority
JP
Japan
Prior art keywords
ash
incineration ash
basicity
heavy metal
incineration
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.)
Active
Application number
JP2006103334A
Other languages
Japanese (ja)
Other versions
JP2007275724A (en
Inventor
幸彦 矢部
義広 坂井
正光 ▲高▼橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinko Pantec Co Ltd
Original Assignee
Kobelco Eco Solutions Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobelco Eco Solutions Co Ltd filed Critical Kobelco Eco Solutions Co Ltd
Priority to JP2006103334A priority Critical patent/JP3833697B1/en
Application granted granted Critical
Publication of JP3833697B1 publication Critical patent/JP3833697B1/en
Publication of JP2007275724A publication Critical patent/JP2007275724A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

【課題】溶融処理する焼却灰の塩基度と重金属濃度を確実に管理することができる焼却灰の塩基度、重金属濃度の管理システムを提供する。
【解決手段】焼却炉11から排出された廃棄物Kの焼却灰の一部の塩基度と重金属濃度とを分析する焼却灰分析装置2と、スクリュコンベヤ3から搬出された焼却灰を貯留する複数の灰貯留槽を備えた灰貯留装置4と、この灰貯留装置4の灰貯留槽のそれぞれから排出され、前記焼却灰分析装置2による分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たさない焼却灰を焼却炉11に返送する焼却灰返送装置6と、塩基度と重金属濃度を共に満たす焼却灰を溶融炉14に供給する焼却灰供給装置8とから構成する。
【選択図】図1
An incineration ash basicity and heavy metal concentration management system capable of reliably managing the basicity and heavy metal concentration of incineration ash to be melt-processed.
And A ash analyzer 2 for analyzing a portion of the basicity and concentration of heavy metals ash waste K m discharged from the incinerator 11, storing the ash taken out from the screw conveyor 3 At least one of the basicity and heavy metal concentration discharged from each of the ash storage device 4 having a plurality of ash storage tanks and the ash storage tank of the ash storage device 4 and determined by the analysis by the incineration ash analyzer 2 Is composed of an incineration ash return device 6 that returns incineration ash that does not satisfy the conditions to the incinerator 11, and an incineration ash supply device 8 that supplies incineration ash that satisfies both basicity and heavy metal concentration to the melting furnace 14.
[Selection] Figure 1

Description

本発明は、焼却炉から排出された廃棄物の焼却灰の塩基度と重金属の重金属濃度とが予め設定した範囲になるように管理することにより、スラグからの重金属の溶出を抑制し、かつ焼却灰をより低温で溶融させることを可能ならしめる焼却灰の塩基度、重金属濃度の管理方法およびそのシステムに関するものである。   The present invention controls the elution of heavy metals from slag by controlling the basicity of the incinerated ash of the waste discharged from the incinerator and the heavy metal concentration of the heavy metals to be within a preset range, and incineration The present invention relates to a method for managing the basicity and heavy metal concentration of incinerated ash that makes it possible to melt ash at a lower temperature, and a system thereof.

都市ごみおよび/または産業廃棄物や下水汚泥等の廃棄物を焼却炉で焼却したり、焼却灰を溶融炉で溶融処理したりするに際して焼却灰(焼却残渣および飛灰)が発生するが、焼却灰は多くの場合、最終処分場に埋立て処分される。ところが、これら焼却灰中に含まれている鉛、カドミウム等の有害な重金属、および有害なダイオキシン等が、雨水等の作用により周囲に溶出して環境を汚染させる要因になっており、大きな問題になっている。
近年では、焼却灰に含まれている重金属の溶出を防止するために、種々の溶出防止手段が採用されるようになってきている。以下、重金属等の溶出防止を可能ならしめるようにした典型的な従来例に係る焼却灰の処理方法を紹介する。
Incineration ash (incineration residue and fly ash) is generated when municipal waste and / or waste such as industrial waste and sewage sludge are incinerated in an incinerator or incinerated ash is melted in a melting furnace. Ashes are often landfilled at final disposal sites. However, harmful heavy metals such as lead and cadmium contained in these incineration ash, and harmful dioxins, etc., leach out to the surroundings due to the action of rainwater, etc., and cause pollution to the environment. It has become.
In recent years, various elution prevention means have been adopted in order to prevent elution of heavy metals contained in incineration ash. In the following, a method for treating incineration ash according to a typical conventional example that makes it possible to prevent elution of heavy metals and the like will be introduced.

従来例1に係るものは、都市ごみおよび/または産業廃棄物を焼却炉で焼却する際に発生する焼却飛灰、または焼却灰を溶融炉で溶融する際に発生する溶融飛灰の処理方法であり、下記のとおりである。なお、前記溶融飛灰、または焼却飛灰を単に飛灰という。
(1)飛灰のpHの測定値が11.0以上の場合は、飛灰を580〜800℃に加熱処理し、処理灰のpHを8.5以上11.0未満にする飛灰の処理方法である。
(2)飛灰のpHの測定値が8.5未満の場合、予めアルカリ源を加えてpHを11.0以上にした後、飛灰を580〜800℃に加熱処理し、処理灰のpHを8.5以上11.0未満にする飛灰の処理方法である。
(3)水洗した飛灰のpHの測定値が12.0以上の場合、飛灰を580〜800℃に加熱処理し、処理灰のpHを8.5以上11.8未満にする飛灰の処理方法である。
(4)水洗した飛灰のpHの測定値が8.5未満の場合、予めアルカリ源を加えてpHを12.0以上にした後、飛灰を580〜800℃に加熱処理し、処理灰のpHを8.5以上11.8未満にする飛灰の処理方法である。
The thing which concerns on the prior art example 1 is the processing method of the incineration fly ash which generate | occur | produces when incinerating municipal waste and / or industrial waste with an incinerator, or the fusion | melting fly ash which generate | occur | produces when incinerating ash is melted with a melting furnace Yes, as follows. The molten fly ash or incinerated fly ash is simply referred to as fly ash.
(1) When the measured value of the fly ash pH is 11.0 or higher, the fly ash is heated to 580 to 800 ° C., and the pH of the treated ash is 8.5 or higher and lower than 11.0. Is the method.
(2) When the measured value of the fly ash pH is less than 8.5, the alkali ash is added in advance to bring the pH to 11.0 or higher, and then the fly ash is heated to 580 to 800 ° C. Is a processing method of fly ash which makes 8.5 to 11.0 or more.
(3) When the measured value of the pH of the washed fly ash is 12.0 or more, the fly ash is heated to 580 to 800 ° C., and the pH of the treated ash is 8.5 to less than 11.8. It is a processing method.
(4) If the measured value of the pH of the fly ash washed with water is less than 8.5, the alkali ash is added in advance to bring the pH to 12.0 or higher, and then the fly ash is heated to 580 to 800 ° C. Is a fly ash treatment method in which the pH is 8.5 or more and less than 11.8.

即ち、上記従来例1に係る飛灰の処理方法は、飛灰のpH測定に際しての非水洗、水洗の前処理の相違により飛灰のpHの範囲を設定し、必要に応じて飛灰のpHを調整した後、580〜800℃で加熱処理して、過熱処理後の処理灰のpHの範囲を変えることより、処理灰中の重金属の溶出を防止すると共に、処理灰中のダイオキシンも同時に分解する焼却飛灰の処理方法である。なお、この従来例1に係る特許公報中において、Pb,Cd,Zn,Cr等の重金属成分溶出は、pH値による依存性が高く、pH値によりPb,Cd,Zn,Cr等の重金属の溶出量が決定されると記載されているが、実施例には重金属としてPb,Cd,Znに係るそれぞれのデータが開示されている(例えば、特許文献1参照。)。   That is, the fly ash treatment method according to the above-mentioned conventional example 1 sets the pH range of the fly ash according to the difference in the pretreatment of the non-washing and washing with water when measuring the pH of the fly ash, and the fly ash pH as necessary. After adjusting the pH, heat treatment at 580 to 800 ° C. to change the pH range of the treated ash after the overheat treatment prevents elution of heavy metals in the treated ash and simultaneously decomposes dioxins in the treated ash. This is a method for treating incineration fly ash. In addition, in the patent publication according to the conventional example 1, elution of heavy metal components such as Pb, Cd, Zn and Cr is highly dependent on the pH value, and elution of heavy metals such as Pb, Cd, Zn and Cr depending on the pH value. Although it is described that the amount is determined, each example relating to Pb, Cd, Zn as a heavy metal is disclosed in the examples (for example, see Patent Document 1).

従来例2に係るものは、都市ごみ等の焼却灰を加熱溶融した後溶融スラグを形成するに当り、より低温での加熱溶融でも、Pb等の重金属の溶出量の少ないスラグを得る焼却灰の溶融処理方法である。この焼却灰の溶融処理方法は、都市ごみを例えば流動床焼却炉で800℃前後の温度で焼却し、焼却により生じた焼却灰をストレージングタンクに貯蔵した後、搬出時に水により加湿する。このような焼却灰を、電気炉に投入し、電気炉内の雰囲気中の酸素濃度が10%以下となるように、不活性ガスであるNガスを供給しながら1350〜1500℃に加熱して溶融した後に、水中に投入して溶融スラグを凝固させるものである。 In the case of the conventional example 2, the incineration ash is obtained by heating and melting incineration ash such as municipal waste and then obtaining slag with a small amount of elution of heavy metals such as Pb, even by heating and melting at a lower temperature. It is a melt processing method. In this incineration ash melting method, municipal waste is incinerated at a temperature of, for example, about 800 ° C. in a fluidized bed incinerator, the incinerated ash generated by incineration is stored in a storage tank, and then humidified with water at the time of carrying out. Such incineration ash is put into an electric furnace and heated to 1350-1500 ° C. while supplying N 2 gas which is an inert gas so that the oxygen concentration in the atmosphere in the electric furnace becomes 10% or less. After melting, the molten slag is solidified by being poured into water.

このように、焼却灰の溶融時にNガスを供給して電気炉内の酸素濃度を低下させると、溶融温度がより低温でも重金属酸化物、例えばPbO等が還元され易くなり、還元により生じたPbが焼却灰中の塩素(Cl)と反応して塩化物が形成される。この塩化物は融点・沸点が低く、容易に揮散するために、溶融スラグ中へのPb等の移行率が低下する。
しかも、焼却灰の溶融温度がより低温であるから、電気炉の寿命が向上し、エネルギーコストも低下するので、焼却灰の溶融コストをより安価なものとすることができる(例えば、特許文献2参照。)。
Thus, when supplying the N 2 gas during the melting of the ash to lower the oxygen concentration in the electric furnace, heavy metal oxides melting temperature even at lower temperatures, for example, easily PbO or the like is reduced, caused by the reduction Pb reacts with chlorine (Cl) in the incineration ash to form chloride. Since this chloride has a low melting point / boiling point and easily volatilizes, the rate of transfer of Pb or the like into the molten slag decreases.
Moreover, since the melting temperature of the incinerated ash is lower, the life of the electric furnace is improved and the energy cost is also reduced, so that the melting cost of the incinerated ash can be made lower (for example, Patent Document 2). reference.).

従来例3に係るものは、スラグの重金属溶出防止方法である。より詳しくは、重金属を含む焼却灰を溶融炉により溶融処理してスラグを生成する際に、焼却灰と共に、焼却灰に含まれている重金属に対して少なくとも等モル量の硫黄となる量の硫化鉱石を溶融炉に供給して、スラグ生成過程で重金属の硫黄化合物を生成させて安定化させることにより、スラグ処分時における重金属の溶出を防止するようにしたものである。なお、ごみの焼却灰から生成されたスラグには、アルミニウム、ケイ素、カルシウム等の他に、重金属類として、鉛、銅、亜鉛等が含まれているとしている(例えば、特許文献3参照。)。
特開平11−192471号公報 特開平11−104592号公報 特開2000−001346
What concerns the prior art example 3 is a heavy metal elution prevention method of slag. More specifically, when incineration ash containing heavy metal is melted in a melting furnace to produce slag, sulfur in an amount that forms at least an equimolar amount of sulfur with respect to the heavy metal contained in the incineration ash together with the incineration ash. By supplying ore to the melting furnace and generating and stabilizing heavy metal sulfur compounds in the slag generation process, elution of heavy metals during slag disposal is prevented. In addition, the slag produced from the incineration ash of waste contains lead, copper, zinc, and the like as heavy metals in addition to aluminum, silicon, calcium, and the like (see, for example, Patent Document 3). .
Japanese Patent Laid-Open No. 11-192471 JP-A-11-104592 JP 2000-001346 A

ところで、廃棄物の焼却灰を溶融して減容化するに際して、焼却灰の塩基度を調整することは、スラグからの重金属、例えば六価クロムの溶出量を抑制する(環境保全)点において極めて重要である。また、焼却灰の重金属濃度、例えば全クロム(溶融温度が極めて高い)濃度を所定値以下に調整することは、焼却灰の溶融温度の低下につながるため、溶融炉の内張り耐火物の寿命延長に伴う焼却灰の溶融処理コストの低減にとって極めて重要である。にもかかわらず、上記特許文献1乃至3の何れにも、焼却灰の塩基度を調整するという記載や示唆はあるものの、具体的な調整手段については何ら説明されていないのに加えて、焼却灰の全クロム濃度の調整については、その記載もない。   By the way, when melting and reducing the volume of incinerated ash, adjusting the basicity of the incinerated ash is extremely effective in reducing the amount of elution of heavy metals such as hexavalent chromium from slag (environmental conservation). is important. In addition, adjusting the heavy metal concentration of incineration ash, for example, the total chromium (extremely high melting temperature) concentration, to a predetermined value or less leads to a decrease in the melting temperature of the incineration ash, thus extending the life of the refractory lining the melting furnace. This is extremely important for reducing the cost of incineration ash melting. Nonetheless, in any of the above Patent Documents 1 to 3, although there is a description or suggestion of adjusting the basicity of the incineration ash, no specific adjustment means are described, and incineration There is no description on the adjustment of the total chromium concentration of ash.

従って、本発明の目的は、焼却炉から排出された廃棄物の焼却灰を溶融炉で溶融するに際して、焼却灰の塩基度と重金属の重金属濃度とが予め設定した範囲になるように、確実に管理することを可能ならしめるようにした焼却灰の塩基度、重金属濃度の管理方法およびそのシステムを提供することである。   Therefore, the object of the present invention is to ensure that when the incineration ash discharged from the incinerator is melted in the melting furnace, the basicity of the incineration ash and the heavy metal concentration of the heavy metal are within a preset range. It is to provide a management method and system for the basicity and heavy metal concentration of incinerated ash that can be managed.

本発明は、上記実情に鑑みてなされたものであって、従って、上記課題を解決するために、本発明の請求項1に係る焼却灰の塩基度、重金属濃度の管理方法が採用した手段は、焼却炉から排出される廃棄物の焼却灰を溶融炉に供給するに際して、前記焼却灰の塩基度と重金属の重金属濃度とが予め設定した範囲になるように管理する焼却灰の塩基度、重金属濃度の管理方法であって、焼却灰の塩基度を分析する塩基度分析工程と、焼却灰の重金属濃度を分析する重金属濃度分析工程と、前記分析工程を経た焼却灰を分配して複数の灰貯留槽に供給して貯留させる焼却灰貯留工程と、前記各分析工程における分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰を各灰貯留槽毎に焼却炉に返送する焼却灰返送工程に振り分ける一方、前記各分析工程における分析により求められた塩基度と重金属濃度が共に条件を満たしている焼却灰を各灰貯留槽毎に溶融炉に供給する焼却灰溶融工程に振り分ける焼却灰振り分け工程とからなることを特徴とするものである。   The present invention has been made in view of the above circumstances. Therefore, in order to solve the above-mentioned problems, the means adopted by the method for managing the basicity and heavy metal concentration of incineration ash according to claim 1 of the present invention are as follows. The basicity of the incineration ash and the heavy metal are controlled so that the basicity of the incineration ash and the heavy metal concentration of the heavy metal are within a preset range when supplying the incineration ash of the waste discharged from the incinerator to the melting furnace. Concentration management methods comprising: a basicity analysis step for analyzing the basicity of incinerated ash; a heavy metal concentration analysis step for analyzing the heavy metal concentration of the incinerated ash; An incinerator for incineration ash that is supplied to and stored in a storage tank, and incineration ash for which at least one of the basicity and heavy metal concentration determined by the analysis in each analysis process does not satisfy the condition, for each ash storage tank Incineration to return to Incineration ash which distributes to the incineration ash melting process which distributes the incineration ash satisfying both the basicity and heavy metal concentration obtained by the analysis in each analysis process to the melting furnace for each ash storage tank while distributing to the return process It consists of a sorting process.

本発明の請求項2に係る焼却灰の塩基度、重金属濃度の管理方法が採用した手段は、請求項1に記載の焼却灰の塩基度、重金属濃度の管理方法において、前記重金属濃度分析工程で分析する対象は、全クロムであることを特徴とするものである。   The means adopted by the method for managing the basicity and heavy metal concentration of incineration ash according to claim 2 of the present invention is the method for managing the basicity and heavy metal concentration of incineration ash according to claim 1, in the heavy metal concentration analyzing step. The object to be analyzed is characterized by total chromium.

本発明の請求項3に係る焼却灰の塩基度、重金属濃度の管理方法が採用した手段は、請求項1または2のうちの何れか一つの項に記載の焼却灰の塩基度、重金属濃度の管理方法において、前記焼却灰返送工程に振り分けられる焼却灰は塩基度が1.0を超える焼却灰であり、また前記焼却灰溶融工程に振り分けられる焼却灰は塩基度が1.0以下の焼却灰であることを特徴とするものである。   The means adopted by the method for managing the basicity and heavy metal concentration of incineration ash according to claim 3 of the present invention is the basicity and heavy metal concentration of incineration ash according to any one of claims 1 and 2. In the management method, the incineration ash distributed to the incineration ash return step is an incineration ash having a basicity exceeding 1.0, and the incineration ash to be distributed to the incineration ash melting step is an incineration ash having a basicity of 1.0 or less. It is characterized by being.

本発明の請求項4に係る焼却灰の塩基度、重金属濃度の管理方法が採用した手段は、請求項2または3のうちの何れか一つの項に記載の焼却灰の塩基度、重金属濃度の管理方法において、前記焼却灰返送工程に振り分けられる焼却灰は全クロム濃度が50,000mg/kgを超える焼却灰であり、また前記焼却灰溶融工程に振り分けられる焼却灰は全クロム濃度が50,000mg/kg以下の焼却灰であることを特徴とするものである。   The means adopted by the method for managing the basicity and heavy metal concentration of incineration ash according to claim 4 of the present invention is the basicity and heavy metal concentration of incineration ash according to any one of claims 2 and 3. In the management method, the incineration ash distributed to the incineration ash return step is an incineration ash having a total chromium concentration exceeding 50,000 mg / kg, and the incineration ash to be distributed to the incineration ash melting step has a total chromium concentration of 50,000 mg. / Kg or less incinerated ash.

本発明の請求項5に係る焼却灰の塩基度、重金属濃度の管理システムが採用した手段は、焼却炉から排出された廃棄物の焼却灰の一部の塩基度と重金属濃度とを分析する焼却灰分析装置と、分析された焼却灰を分配・供給する灰分配装置と、この灰分配装置により分配されて供給される焼却灰を貯留する複数の灰貯留槽を備えてなる灰貯留装置と、この灰貯留装置の複数の灰貯留槽のそれぞれから切出され、前記焼却灰分析装置による分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰を各灰貯留槽毎に焼却炉に返送する焼却灰返送装置と、前記焼却灰分析装置による分析により求められた塩基度と重金属濃度が共に条件を満たしている焼却灰を各灰貯留槽毎に溶融炉に供給する焼却灰供給装置とからなることを特徴とするものである。
ところにある。
The means adopted by the management system for the basicity and heavy metal concentration of incineration ash according to claim 5 of the present invention is an incineration for analyzing the basicity and heavy metal concentration of a part of the incineration ash of the waste discharged from the incinerator. An ash analysis device, an ash distribution device that distributes and supplies the analyzed incinerated ash, and an ash storage device that includes a plurality of ash storage tanks for storing the incinerated ash distributed and supplied by the ash distribution device, Incinerated ash that is cut out from each of a plurality of ash storage tanks of the ash storage apparatus and at least one of the basicity and heavy metal concentration determined by the analysis by the incineration ash analysis apparatus does not satisfy the condition is stored in each ash storage tank. An incineration ash return device that returns to the incinerator every time, and incineration ash that satisfies both the basicity and heavy metal concentration determined by the analysis by the incineration ash analysis device is supplied to the melting furnace for each ash storage tank Incineration ash supply equipment It is characterized in that Ranaru.
By the way.

本発明の請求項6に係る焼却灰の塩基度、重金属濃度の管理システムが採用した手段は、請求項5に記載の焼却灰の塩基度、重金属濃度の管理システムにおいて、前記焼却灰返送装置に、塩基度調整剤を供給すると共に、クロム濃度調整剤を供給する調整剤供給装置が設けられてなることを特徴とするものである。   The means adopted by the incineration ash basicity and heavy metal concentration management system according to claim 6 of the present invention is the incineration ash basicity and heavy metal concentration management system according to claim 5, wherein In addition to supplying a basicity adjusting agent, a adjusting agent supply device for supplying a chromium concentration adjusting agent is provided.

本発明の請求項7に係る焼却灰の塩基度、重金属濃度の管理システムが採用した手段は、請求項5または6のうちの何れか一つの項に記載の焼却灰の塩基度、重金属濃度の管理システムにおいて、前記焼却灰返送装置に、塩基度調整剤とクロム濃度調整剤とが添加された塩基度、クロム濃度調整済の再調整焼却灰を貯留する再調整焼却灰貯留槽が設けられてなることを特徴とするものである。   The means adopted by the management system for basicity and heavy metal concentration of incinerated ash according to claim 7 of the present invention is the basicity and heavy metal concentration of incinerated ash according to any one of claims 5 or 6. In the management system, the incineration ash return device is provided with a readjustment incineration ash storage tank for storing the basicity to which the basicity adjusting agent and the chromium concentration adjusting agent are added and the readjustment incineration ash having the adjusted chromium concentration. It is characterized by.

本発明の請求項1乃至4のうちの何れかの一つの項に記載の焼却灰の塩基度、重金属濃度の管理方法、請求項5乃至7のうちの何れかの一つ項に記載の焼却灰の塩基度、重金属濃度の管理システムでは、塩基度分析工程と重金属濃度分析工程を経た焼却灰が灰貯留槽に供給されて貯留される。そして、各分析工程における分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰は各灰貯留槽毎に焼却炉に返送される。一方、各分析工程における分析により求められた塩基度と重金属濃度が共に条件を満たしている焼却灰は各灰貯留槽毎に溶融炉に供給されることとなる。   The method for managing basicity and heavy metal concentration of incineration ash according to any one of claims 1 to 4, and the incineration according to any one of claims 5 to 7. In the management system for the basicity and heavy metal concentration of ash, the incinerated ash that has passed through the basicity analysis step and the heavy metal concentration analysis step is supplied to the ash storage tank and stored. And the incineration ash in which at least one of the basicity and heavy metal density | concentration calculated | required by the analysis in each analysis process does not satisfy | fill conditions is returned to an incinerator for every ash storage tank. On the other hand, the incinerated ash whose basicity and heavy metal concentration determined by the analysis in each analysis step satisfy the conditions is supplied to the melting furnace for each ash storage tank.

従って、本発明の請求項1乃至4のうちの何れかの一つの項に記載の焼却灰の塩基度、重金属濃度の管理方法、請求項5乃至7のうちの何れかの一つの項に記載の焼却灰の塩基度、重金属濃度の管理システムによれば、塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰は各灰貯留槽毎に焼却炉に返送されるが、焼却炉に返送された焼却灰は、この焼却炉に供給される塩基度調整剤と廃棄物の焼却灰と効果的に混合されるため、たとえ塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰であっても、塩基度と重金属濃度の条件を満足させることができる。また、溶融炉の炉内温度が低くても焼却灰を溶融させることができるようになるから、結果的に溶融炉の内張り耐火物の寿命が延長され、溶融炉のメンテナンスコストが低減される結果、焼却灰の溶融処理コストの低減が可能になる。さらに、溶融炉の炉内温度を高温で維持するための補助燃料も低減できるので、ランニングコストの低減、地球温暖化ガスであるCOの削減にも寄与することができる。 Therefore, the basicity and heavy metal concentration management method for incineration ash according to any one of claims 1 to 4 of the present invention, and any one of claims 5 to 7. According to the management system for the basicity and heavy metal concentration of incineration ash, incineration ash whose basicity and heavy metal concentration do not satisfy the conditions is returned to the incinerator for each ash storage tank. The incineration ash returned to is effectively mixed with the basicity modifier supplied to this incinerator and the waste incineration ash, so at least one of basicity and heavy metal concentration does not meet the requirements Even incineration ash can satisfy the conditions of basicity and heavy metal concentration. In addition, the incinerated ash can be melted even when the furnace temperature of the melting furnace is low. As a result, the life of the refractory lining the melting furnace is extended and the maintenance cost of the melting furnace is reduced. It is possible to reduce the cost of incineration ash melting treatment. Furthermore, since the auxiliary fuel for maintaining the furnace temperature in the melting furnace at a high temperature can be reduced, it is possible to contribute to reduction of running cost and CO 2 that is a global warming gas.

本発明の請求項2に係る焼却灰の塩基度、重金属濃度の管理方法では、焼却灰の全クロム濃度を満足させることができる。従って、焼却灰の全クロム濃度を管理することにより、スラグからの六価クロムの溶出量を好適に抑制することが可能になる。   In the management method of the basicity and heavy metal concentration of the incinerated ash according to claim 2 of the present invention, the total chromium concentration of the incinerated ash can be satisfied. Therefore, by controlling the total chromium concentration of the incineration ash, it becomes possible to suitably suppress the elution amount of hexavalent chromium from the slag.

本発明の請求項3に係る焼却灰の塩基度、重金属濃度の管理方法では、塩基度が1.0を超える焼却灰を焼却灰返送工程に振り分けて焼却炉に供給し、焼却炉において塩基度が1.0以下の焼却灰にすることができる。従って、溶融炉に塩基度が1.0以下の焼却灰を確実に供給することができ、表面が耐水性に優れたガラス質で形成されたスラグを形成させることができるから、スラグからの六価クロムの溶出量を効果的に抑制することができるという効果を得ることができる。   In the method for managing the basicity and heavy metal concentration of incineration ash according to claim 3 of the present invention, the incineration ash having a basicity exceeding 1.0 is distributed to the incineration ash return process and supplied to the incinerator, and the basicity in the incinerator Can be incinerated ash of 1.0 or less. Accordingly, incineration ash having a basicity of 1.0 or less can be reliably supplied to the melting furnace, and a slag formed with a glassy surface having excellent water resistance can be formed. The effect that the elution amount of valent chromium can be effectively suppressed can be obtained.

本発明の請求項4に係る焼却灰の塩基度、重金属濃度の管理方法では、全クロム濃度が50,000mg/kgを超える焼却灰を焼却灰返送工程に振り分けて焼却炉に供給することにより、焼却炉において全クロム濃度が50,000mg/kg以下の焼却灰にすることができる。従って、溶融炉に全クロム濃度が50,000mg/kg以下の焼却灰を供給することにより、焼却灰の溶融温度の上昇を抑制することができるから、溶融炉の内張り耐火物の寿命の延長に寄与することができ、結果的に焼却灰の溶融処理コストの低減に寄与することができる。   In the method for managing the basicity and heavy metal concentration of incineration ash according to claim 4 of the present invention, the incineration ash having a total chromium concentration exceeding 50,000 mg / kg is distributed to the incineration ash return step and supplied to the incinerator. Incinerator ash having a total chromium concentration of 50,000 mg / kg or less can be obtained in an incinerator. Therefore, by supplying incineration ash having a total chromium concentration of 50,000 mg / kg or less to the melting furnace, it is possible to suppress an increase in the melting temperature of the incineration ash, thereby extending the life of the refractory lining the melting furnace. As a result, it is possible to contribute to a reduction in the cost of melting the incinerated ash.

本発明の請求項5に係る焼却灰の塩基度、重金属濃度の管理システムでは、灰貯留槽の数が複数であるから、灰貯留槽内の焼却灰を焼却炉に返送する焼却灰返送作業と、焼却炉から排出される焼却灰を灰貯留槽に供給して貯留する焼却灰貯留作業と、灰貯留槽内の焼却灰を溶融炉に供給する焼却灰供給作業とを並行して行うことができる。従って、たとえ塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰があっても、この焼却灰を焼却炉に返送し、かつ焼却炉から排出される焼却灰を貯留しながら、塩基度と重金属濃度の条件を満足する焼却灰を溶融炉に供給することができるから、溶融炉の稼動を停止させることなく、稼動を継続させることができる。   In the incineration ash basicity and heavy metal concentration management system according to claim 5 of the present invention, since the number of ash storage tanks is plural, the incineration ash return work for returning the incineration ash in the ash storage tank to the incinerator; Incineration ash storage work for supplying and storing incineration ash discharged from the incinerator to the ash storage tank and incineration ash supply work for supplying the incineration ash in the ash storage tank to the melting furnace may be performed in parallel. it can. Therefore, even if there is incineration ash whose basicity and heavy metal concentration do not satisfy the conditions, return the incineration ash to the incinerator and store the incineration ash discharged from the incinerator, Since the incinerated ash that satisfies the conditions of the temperature and the heavy metal concentration can be supplied to the melting furnace, the operation can be continued without stopping the operation of the melting furnace.

本発明の請求項6に係る焼却灰の塩基度、重金属濃度の管理システムでは、焼却灰返送装置に、焼却灰に塩基度調整剤を供給すると共に、クロム濃度調整剤を供給する調整剤供給装置が設けられている。従って、塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰の塩基度と重金属濃度が共に条件を満たす焼却灰を焼却炉に供給することができるから、焼却炉から排出される焼却灰の塩基度と重金属濃度の条件を確実に満たすことができる。   In the incineration ash basicity and heavy metal concentration management system according to claim 6 of the present invention, the adjusting agent supply device that supplies the incineration ash return device with the basicity adjusting agent to the incineration ash and also supplies the chromium concentration adjusting agent. Is provided. Therefore, incineration ash that satisfies both the basicity and heavy metal concentration of the incineration ash whose basicity and heavy metal concentration do not satisfy the conditions can be supplied to the incinerator, so that the incineration discharged from the incinerator The conditions of ash basicity and heavy metal concentration can be reliably met.

本発明の請求項7に係る焼却灰の塩基度、重金属濃度の管理システムでは、焼却灰返送装置に、塩基度調整剤とクロム濃度調整剤とが添加された塩基度、クロム濃度調整済の再調整焼却灰を貯留する再調整焼却灰貯留槽が設けられている。従って、焼却灰返送装置が故障により停止した場合でも、システム全体を停止させることなく継続して廃棄物の焼却処理をすることができる。   In the incineration ash basicity and heavy metal concentration management system according to claim 7 of the present invention, a basicity adjusting agent and a chromium concentration adjusting agent are added to the incineration ash return device, and the basicity and chromium concentration adjusted A reconditioned incineration ash storage tank for storing the adjusted incineration ash is provided. Therefore, even when the incineration ash return device is stopped due to a failure, it is possible to continuously incinerate the waste without stopping the entire system.

以下、本発明の焼却灰の塩基度、重金属濃度の管理方法を実施する、本発明の実施の形態に係る焼却灰の塩基度、重金属濃度の管理システムを、添付図面を参照しながら説明する。図1は本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムの模式的系統図、図2は本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムの灰貯留槽への焼却灰の貯留手順説明図である。図3は本発明の実施の形態2に係る焼却灰の塩基度、重金属濃度の管理システムの一部を示す模式的系統図である。   Hereinafter, the management system for the basicity and heavy metal concentration of incineration ash according to the embodiment of the present invention, which implements the management method for basicity and heavy metal concentration of incineration ash according to the present invention, will be described with reference to the accompanying drawings. FIG. 1 is a schematic system diagram of a management system for basicity and heavy metal concentration of incineration ash according to Embodiment 1 of the present invention, and FIG. 2 shows basicity and heavy metal concentration of incineration ash according to Embodiment 1 of the present invention. It is storage procedure explanatory drawing of the incineration ash to the ash storage tank of a management system. FIG. 3 is a schematic system diagram showing a part of the management system for basicity and heavy metal concentration of incinerated ash according to Embodiment 2 of the present invention.

先ず、本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムを、図1を参照しながら説明する。図1において、二点鎖線枠内に示めす焼却灰の塩基度、重金属濃度の管理システムAcsは、灰分配装置である後述する構成になるスクリュコンベヤ3を備えている。このスクリュコンベヤ3には、廃棄物供給装置10から廃棄物(下水汚泥)Kが供給されると共に、塩基度調整剤と全クロム濃度調整剤とが供給される焼却炉11から煙道を介して燃焼排ガスが供給され、燃焼排ガス中の廃棄物の焼却により発生する焼却灰を分離するサイクロン12から分離された焼却灰、およびサイクロン12から焼却灰が分離された燃焼排ガスが供給され、この燃焼排ガス中の飛灰を捕捉するバグフィルタ13で捕捉された飛灰をスクリュコンベヤ3に搬送する焼却灰搬送装置1が設けられている。 First, a management system for basicity and heavy metal concentration of incinerated ash according to Embodiment 1 of the present invention will be described with reference to FIG. In Figure 1, the base of the shown female ash in the two-dot chain line frame, management system A cs heavy metal concentration has a screw conveyor 3 to be configured to be described later is ash dispensing device. The screw conveyor 3, through the flue from waste waste from the feed device 10 with (sewage sludge) K m is supplied, incinerator 11 where the basicity adjusting agent and total chromium concentration adjusting agent is supplied The combustion exhaust gas is supplied, and the incineration ash separated from the cyclone 12 for separating the incineration ash generated by incineration of the waste in the combustion exhaust gas, and the combustion exhaust gas from which the incineration ash is separated from the cyclone 12 are supplied. An incinerated ash transport device 1 is provided for transporting fly ash captured by a bag filter 13 that captures fly ash in exhaust gas to a screw conveyor 3.

前記焼却灰搬送装置1内の焼却灰と、飛灰とからなる混合灰(以下、焼却灰という。)の一部は取り出され、塩基度{CaO/SiOまたは(CaO+MgO)/SiO}と重金属濃度とを分析する焼却灰分析装置2に送られ、この焼却灰分析装置2による分析結果から焼却灰の塩基度と重金属濃度が求められるようになっている。ところで、前記バグフィルタ13から排出された飛灰除去後の燃焼排ガスは、図示しない煙突から大気中に放出される。なお、焼却灰分析装置2は、蛍光X線分析器(株式会社島津製作所製、型式;EDX−700HS)、または、オンライン蛍光X線分析装置である。 A part of mixed ash (hereinafter referred to as incineration ash) composed of incineration ash and fly ash in the incineration ash transport device 1 is taken out and basicity {CaO / SiO 2 or (CaO + MgO) / SiO 2 } It is sent to the incineration ash analyzer 2 for analyzing the heavy metal concentration, and the basicity and heavy metal concentration of the incineration ash are obtained from the analysis result by the incineration ash analyzer 2. By the way, the combustion exhaust gas after the fly ash removal discharged from the bag filter 13 is discharged into the atmosphere from a chimney (not shown). The incineration ash analyzer 2 is a fluorescent X-ray analyzer (manufactured by Shimadzu Corporation, model: EDX-700HS) or an online fluorescent X-ray analyzer.

前記スクリュコンベヤ3には、このスクリュコンベヤ3から切出された焼却灰を排出する第1灰排出ライン3a、第2灰排出ライン3b、第3灰排出ライン3cが設けられている。前記第1灰排出ライン3aは3槽の灰貯留槽からなる灰貯留装置4のうちの第1灰貯留槽4aに連通し、第2灰排出ライン3bは第2灰貯留槽4bに連通し、第3灰排出ライン3cは第3灰貯留槽4cに連通している。   The screw conveyor 3 is provided with a first ash discharge line 3a, a second ash discharge line 3b, and a third ash discharge line 3c for discharging the incinerated ash cut out from the screw conveyor 3. The first ash discharge line 3a communicates with the first ash storage tank 4a of the ash storage device 4 including three ash storage tanks, the second ash discharge line 3b communicates with the second ash storage tank 4b, The third ash discharge line 3c communicates with the third ash storage tank 4c.

そして、これら第1灰貯留槽4a、第2灰貯留槽4b、および第3灰貯留槽4cには前記スクリュコンベヤ3から切出された焼却灰が、図2に示すように、1日のうち8時間ずつ供給されて貯留されるように構成されている。なお、この実施の形態1においては、灰貯留装置4は第1灰貯留槽4a、第2灰貯留槽4b、および第3灰貯留槽4cの3槽の灰貯留槽を備えているが、2槽以上であればよいので、灰貯留槽の槽数は3槽に限定されるものではない。また、前記スクリュコンベヤ3から切出された焼却灰の塩基度・重金属濃度の分析は、図2からよく理解されるように、各灰貯留槽への焼却供給開始時に1回行われ、その所要時間は10分程度で十分である。なお、オンライン蛍光X線分析装置を利用すれば、15〜20分間隔での測定を行うことが可能である。   And in the 1st ash storage tank 4a, the 2nd ash storage tank 4b, and the 3rd ash storage tank 4c, as shown in FIG. It is configured to be supplied and stored every 8 hours. In the first embodiment, the ash storage device 4 includes three ash storage tanks, a first ash storage tank 4a, a second ash storage tank 4b, and a third ash storage tank 4c. Since the number of tanks of the ash storage tank is not limited to three tanks, the number of tanks is not limited to three. In addition, the basicity and heavy metal concentration of the incinerated ash cut out from the screw conveyor 3 are analyzed once at the start of incineration supply to each ash storage tank, as is well understood from FIG. A time of about 10 minutes is sufficient. In addition, if an on-line fluorescent X-ray analyzer is used, it is possible to measure at intervals of 15 to 20 minutes.

前記灰貯留装置4の第1灰貯留槽4a、第2灰貯留槽4b、および第3灰貯留槽4cの下部位置には、個別に操作される灰切出し装置5が設けられている。そして、この灰切出し装置5の操作により切出された第1灰貯留槽4a、第2灰貯留槽4b、および第3灰貯留槽4c内の焼却灰は、前記焼却灰分析装置2による分析結果から求められた焼却灰の塩基度・重金属濃度に応じて、各灰貯留槽毎に焼却炉11に返送され、また溶融炉14に供給されるように構成されている。   At the lower positions of the first ash storage tank 4a, the second ash storage tank 4b, and the third ash storage tank 4c of the ash storage device 4, an ash extraction device 5 that is individually operated is provided. And the incineration ash in the 1st ash storage tank 4a, the 2nd ash storage tank 4b, and the 3rd ash storage tank 4c cut out by operation of this ash extraction apparatus 5 is the analysis result by the said incineration ash analyzer 2 According to the basicity and heavy metal concentration of the incinerated ash obtained from the above, the ash storage tank is returned to the incinerator 11 and supplied to the melting furnace 14 in accordance with the ash storage tank.

より詳しくは、前記焼却灰分析装置2による分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰は、図示しない開閉弁の開弁によって焼却灰返送装置6に振り分けられ、焼却灰返送装置6を介して焼却炉11に返送される(焼却灰返送工程)。一方、前記焼却灰分析装置2による分析により求められた塩基度と重金属濃度が共に条件を満たしている焼却灰は、図示しない開閉弁の開弁により焼却灰供給装置8に振り分けられ、焼却灰供給装置8を介して溶融炉14に供給される(焼却灰溶融工程)ように構成されている。なお、前記開閉弁は何れも焼却灰返送装置6と焼却灰供給装置8との分岐部に設けられている。   More specifically, incineration ash in which at least one of the basicity and heavy metal concentration determined by the analysis by the incineration ash analyzer 2 does not satisfy the condition is distributed to the incineration ash return device 6 by opening an opening / closing valve (not shown). And returned to the incinerator 11 via the incineration ash return device 6 (incineration ash return process). On the other hand, the incineration ash whose basicity and heavy metal concentration determined by the analysis by the incineration ash analysis device 2 satisfy the conditions is distributed to the incineration ash supply device 8 by opening an on-off valve (not shown) to supply the incineration ash. It is configured to be supplied to the melting furnace 14 via the apparatus 8 (incineration ash melting step). The on-off valves are all provided at a branch portion between the incineration ash return device 6 and the incineration ash supply device 8.

ところで、振り分けの基準となる塩基度を満たす焼却灰の条件とは、塩基度が1.0以下の焼却灰のことである。また、重金属濃度、特に全クロム濃度を満たす焼却灰の条件とは、全クロム濃度が50,000mg/kg以下の焼却灰のことである。塩基度を満たす焼却灰の条件や全クロム濃度を満たす焼却灰の条件は、何れも種々の試験によって求めたものであって、塩基度が1.0以下の焼却灰を溶融炉14に供給することにより、表面が耐水性に優れたガラス質で形成されたスラグを形成させることができるから、六価クロムの溶出量の抑制に寄与することができるという効果を得ることができる。また、全クロム濃度が50,000mg/kg以下の焼却灰を溶融炉14に供給することにより、焼却灰を1500℃以下の温度(炉内平均温度)で溶融することができる。従って、溶融炉14の内張り耐火物の寿命の延長効果が得られるから、焼却灰の溶融処理コストの低減に寄与することができる。   By the way, the condition of the incineration ash satisfying the basicity serving as a reference for distribution is incineration ash having a basicity of 1.0 or less. Moreover, the conditions of the incineration ash which satisfy | fills heavy metal density | concentration, especially total chromium density | concentration are incineration ash whose total chromium density | concentration is 50,000 mg / kg or less. The conditions of the incinerated ash satisfying the basicity and the condition of the incinerated ash satisfying the total chromium concentration are obtained by various tests, and the incinerated ash having a basicity of 1.0 or less is supplied to the melting furnace 14. As a result, it is possible to form a slag having a surface formed of glass having excellent water resistance, and thus an effect of being able to contribute to the suppression of the elution amount of hexavalent chromium can be obtained. Further, by supplying incineration ash having a total chromium concentration of 50,000 mg / kg or less to the melting furnace 14, the incineration ash can be melted at a temperature of 1500 ° C. or less (in-furnace average temperature). Therefore, since the effect of extending the life of the refractory lining the melting furnace 14 can be obtained, it is possible to contribute to the reduction of the melting treatment cost of the incineration ash.

前記焼却灰返送装置6には調整剤供給装置7が連通しており、焼却灰返送装置6を焼却炉11に向って返送される、塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰に塩基度調整剤が供給されると共に、クロム濃度調整剤が供給されるようになっている。また、焼却灰返送装置6の調整剤供給装置7の連通位置の下流側に再調整焼却灰貯留槽6aが設けられており、この再調整焼却灰貯留槽6aに塩基度調整剤とクロム濃度調整剤とが添加された塩基度、クロム濃度調整済の再調整焼却灰が貯留された後、この再調整焼却灰貯留槽6aの下部位置に設けられた再調整焼却灰切出し装置6bの操作により焼却炉11に供給されるように構成されている。なお、焼却灰返送装置6に再調整焼却灰貯留槽6aを介装することにより、焼却炉11へ返送される前に予め塩基度の再調整を行うことができる。そのため、焼却炉11での塩基度調整に影響を与えることがなくなるという効果を得ることができる。   A regulator supply device 7 communicates with the incineration ash return device 6 and the incineration ash return device 6 is returned to the incinerator 11 and at least one of basicity and heavy metal concentration does not satisfy the condition. A basicity adjusting agent is supplied to the incinerated ash, and a chromium concentration adjusting agent is supplied. Moreover, the readjustment incineration ash storage tank 6a is provided in the downstream of the communication position of the adjustment agent supply apparatus 7 of the incineration ash return apparatus 6, and the basicity adjustment agent and chromium concentration adjustment are provided in this readjustment incineration ash storage tank 6a. After the reconditioned incinerated ash with adjusted basicity and chromium concentration added is stored, incineration is performed by operating the reconditioned incinerated ash cutting device 6b provided at the lower position of the reconditioned incinerated ash storage tank 6a. It is configured to be supplied to the furnace 11. In addition, by interposing the readjustment incineration ash storage tank 6 a in the incineration ash return device 6, the basicity can be readjusted before being returned to the incinerator 11. Therefore, it is possible to obtain an effect that the basicity adjustment in the incinerator 11 is not affected.

以下、本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムの作用態様を説明する。即ち、本発明の実施の形態に係る塩基度、重金属濃度の管理システムによれば、サイクロン12によって分離された焼却灰と、バグフィルタ13によって捕捉された飛灰とからなる焼却灰の一部が焼却灰搬送装置1から取出され、取出された焼却灰の一部の塩基度と重金属濃度である全クロム濃度とが焼却灰分析装置2による分析結果から求められる(塩基度分析工程と、重金属濃度分析工程)。塩基度と全クロム濃度とが求められた焼却灰はスクリュコンベヤ3から第1灰貯留槽4a、第2灰貯留槽4b、第3灰貯留槽4cのそれぞれに供給される(焼却灰貯留工程)。   Hereinafter, the operation mode of the management system for basicity and heavy metal concentration of incineration ash according to Embodiment 1 of the present invention will be described. That is, according to the basicity and heavy metal concentration management system according to the embodiment of the present invention, a part of the incineration ash composed of the incineration ash separated by the cyclone 12 and the fly ash captured by the bag filter 13 is obtained. The basicity of a portion of the incinerated ash taken out from the incineration ash transport device 1 and the total chromium concentration, which is the heavy metal concentration, are obtained from the analysis results by the incineration ash analyzer 2 (basicity analysis step and heavy metal concentration) Analysis process). The incineration ash whose basicity and total chromium concentration are determined is supplied from the screw conveyor 3 to each of the first ash storage tank 4a, the second ash storage tank 4b, and the third ash storage tank 4c (incineration ash storage process). .

そして、各分析工程で得られた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰が灰貯留槽毎に焼却灰返送装置6に振り分けられる一方、各分析工程で得られた塩基度と重金属濃度が共に条件を満たしている焼却灰が灰貯留槽毎に焼却灰供給装置8に振り分けられる(焼却灰振り分け工程)。焼却灰返送装置6に振り分けられた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰に調整剤供給装置7から後述する塩基度調整剤とクロム濃度調整剤が添加され、塩基度、クロム濃度調整済の再調整焼却灰が再調整焼却灰貯留槽6aに貯留された後、焼却炉11に供給される(焼却灰返送工程)。また、焼却灰供給装置8に振り分けられた塩基度と重金属濃度の条件を共に満たす焼却灰は溶融炉14に供給されて溶融される(焼却灰溶融工程)。   And the incineration ash in which at least one of the basicity and heavy metal concentration obtained in each analysis step does not satisfy the condition is distributed to the incineration ash return device 6 for each ash storage tank, while the base obtained in each analysis step The incineration ash that satisfies both conditions of the degree and the heavy metal concentration is distributed to the incineration ash supply device 8 for each ash storage tank (incineration ash distribution step). A basicity adjusting agent and a chromium concentration adjusting agent, which will be described later, are added from the adjusting agent supply device 7 to the incinerated ash in which at least one of the basicity and heavy metal concentration allocated to the incineration ash return device 6 does not satisfy the conditions, and the basicity Then, the readjusted incineration ash with the adjusted chromium concentration is stored in the readjusted incineration ash storage tank 6a and then supplied to the incinerator 11 (incineration ash returning process). Moreover, the incineration ash that satisfies both the basicity and heavy metal concentration conditions distributed to the incineration ash supply device 8 is supplied to the melting furnace 14 and melted (incineration ash melting step).

前記塩基度調整剤とクロム濃度調整剤とは全く同種類のものであって、消石灰、生石灰、珪砂、およびドロマイトのうちの何れか1種類以上のものである。調整剤供給装置7からの塩基度調整剤とクロム濃度調整剤の添加量は、前記焼却灰分析装置2による分析結果から求められた焼却灰搬送装置1から取出された焼却灰の一部の塩基度、全クロム濃度とこれらの設定値、つまり塩基度1.0以下、全クロム濃度50,000mg/kg以下の比較に基づいて決定される。   The basicity adjusting agent and the chromium concentration adjusting agent are of the same type, and are any one or more of slaked lime, quicklime, silica sand, and dolomite. The addition amount of the basicity adjusting agent and the chromium concentration adjusting agent from the adjusting agent supply device 7 is a partial base of the incinerated ash taken out from the incinerated ash transport device 1 obtained from the analysis result by the incinerated ash analyzing device 2 And the total chromium concentration and their set values, that is, based on a comparison of a basicity of 1.0 or less and a total chromium concentration of 50,000 mg / kg or less.

本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムAcsによれば、上記のとおり、塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰は、塩基度または全クロム濃度(重金属濃度)が再調整された後に焼却炉11へ返送される。そして、焼却炉11に返送された焼却灰は、この焼却炉11に供給される塩基度調整剤、廃棄物(下水汚泥)Kの焼却灰と共に炉内において激しく混合されるから、たとえ塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰であっても、この焼却灰の塩基度と重金属濃度の条件を確実に満足させることができる。 Basicity of ash according to the first embodiment of the present invention, according to the management system A cs of heavy metal concentrations, as described above, ash at least one of the basicity and heavy metals concentration does not satisfy the condition, the base Or the total chromium concentration (heavy metal concentration) is readjusted and returned to the incinerator 11. The ash that is returned to the incinerator 11, basicity adjusting agent supplied to the incinerator 11, from being intensely mixed in a furnace with waste (sewage sludge) incineration ash of K m, if the basicity Even if the incineration ash is such that at least one of the heavy metal concentrations does not satisfy the conditions, the basicity and heavy metal concentration conditions of the incineration ash can be satisfied with certainty.

従って、本実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムAcsによれば、溶融炉14に塩基度が1.0以下の焼却灰が供給され、表面が耐水性に優れたガラス質で形成されたスラグを形成させることができるから、焼却灰の溶融に際してのクロムの酸化により生じる六価クロムの溶出量の抑制に寄与することができる。また、上記のとおり、溶融炉14に全クロム濃度が50,000mg/kg以下の焼却灰が供給され、焼却灰を1500℃以下の温度(炉内平均温度)で溶融することができるから、溶融炉14の内張り耐火物の寿命の延長に寄与することができるという効果を得ることができる。 Therefore, the basicity of the ash according to the first embodiment, according to the management system A cs of heavy metal concentrations, basicity is supplied 1.0 following incinerated ash to the melting furnace 14, the surface is excellent in water resistance Since slag formed of vitreous glass can be formed, it can contribute to the suppression of the elution amount of hexavalent chromium generated by the oxidation of chromium during melting of incineration ash. Further, as described above, incineration ash having a total chromium concentration of 50,000 mg / kg or less is supplied to the melting furnace 14, and the incineration ash can be melted at a temperature of 1500 ° C. or less (average temperature in the furnace). The effect that it can contribute to the extension of the lifetime of the lining refractory of the furnace 14 can be acquired.

また、本実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムAcsによれば、灰貯留装置4の灰貯留槽の槽数が複数であるから、灰貯留槽内の焼却灰を焼却炉11に返送する焼却灰返送工程と、焼却炉11から排出される焼却灰を灰貯留槽に供給して貯留する焼却灰貯留工程と、灰貯留槽内の焼却灰を溶融炉14に供給する焼却灰供給工程とを並行して行うことができる。 Further, basicity of ash according to the first embodiment, according to the management system A cs of heavy metal concentrations, because number of tanks ash reservoir ash accumulating device 4 is a plurality, ash in the ash reservoir Ash return process for returning the ash to the incinerator 11, an incineration ash storage process for supplying and storing the incineration ash discharged from the incinerator 11 to the ash storage tank, and the incineration ash in the ash storage tank to the melting furnace 14 The incinerated ash supply process to supply can be performed in parallel.

つまり、たとえ塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰があっても、この焼却灰を焼却炉11に返送し、かつ焼却炉11から排出される焼却灰を貯留しながら、塩基度と重金属濃度の条件を満足する焼却灰を溶融炉14に供給することができる。従って、溶融炉14の稼動を停止させることなく、その稼動を継続させることができるから、焼却灰を焼却炉11に返送しなければならない場合があっても、焼却灰の溶融処理能率が低下するようなことがない。   That is, even if there is an incineration ash whose basicity and heavy metal concentration do not satisfy the condition, the incineration ash is returned to the incinerator 11 and the incineration ash discharged from the incinerator 11 is stored. Incinerated ash that satisfies the conditions of basicity and heavy metal concentration can be supplied to the melting furnace 14. Accordingly, since the operation of the melting furnace 14 can be continued without stopping, even if the incineration ash has to be returned to the incinerator 11, the melting efficiency of the incineration ash is reduced. There is no such thing.

さらに、本実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムAcsによれば、調整剤供給装置7から焼却灰返送装置6に、この焼却灰返送装置6をとおる焼却灰に塩基度調整剤を供給すると共に、クロム濃度調整剤を供給する調整剤供給装置7が連通している。従って、塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰の塩基度と重金属濃度が共に条件を満たす焼却灰を、再調整焼却灰貯留槽6aから焼却炉11に供給することができるから、焼却炉11から排出される焼却灰の塩基度と重金属濃度の条件を確実に満たすことができる。 Moreover, the basicity of the ash according to the first embodiment, according to the management system A cs of heavy metals concentration in ash return device 6 from modifier supply unit 7, the ash return device 6 passing through ash While supplying the basicity adjusting agent, the adjusting agent supply device 7 for supplying the chromium concentration adjusting agent is communicated. Therefore, the incineration ash satisfying both the basicity and heavy metal concentration of the incineration ash in which at least one of the basicity and the heavy metal concentration does not satisfy the condition is supplied from the readjusted incineration ash storage tank 6a to the incinerator 11. Therefore, the conditions of the basicity and heavy metal concentration of the incinerated ash discharged from the incinerator 11 can be reliably satisfied.

次に、本発明の実施の形態2に係る焼却灰の塩基度、重金属濃度の管理システムAcsを、図3を参照しながら説明する。即ち、本発明の実施の形態2に係る焼却灰の塩基度、重金属濃度の管理システムAcsは、上記実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムAcsの灰切出し装置5と焼却灰供給装置8との間に、被溶融焼却灰貯留槽8a、被溶融焼却灰切出し装置8bを設けた構成になるものである。この構成によれば、灰貯留装置を小容量にすると共に、この灰貯留装置の灰貯留槽の槽数を2槽に限定することにより、省スペース化が可能になる。また、被溶融焼却灰貯留槽8aを大容量にすることにより、焼却炉11、焼却灰分析装置2、灰切出し装置5、焼却灰返送装置6の何れか一方が故障した場合でも、溶融炉14を継続運転することが可能になるという効果を得ることができる。 Next, an incineration ash basicity and heavy metal concentration management system Acs according to Embodiment 2 of the present invention will be described with reference to FIG. That is, the incineration ash basicity and heavy metal concentration management system A cs according to the second embodiment of the present invention is the ash extraction device of the incineration ash basicity and heavy metal concentration management system A cs according to the first embodiment. 5 and the incinerated ash supply device 8 are provided with a molten incinerated ash storage tank 8a and a molten incinerated ash cutting device 8b. According to this configuration, it is possible to save space by reducing the capacity of the ash storage device and limiting the number of ash storage tanks of the ash storage device to two. Moreover, even if any one of the incinerator 11, the incineration ash analyzer 2, the ash extraction device 5, and the incineration ash return device 6 breaks down by increasing the capacity of the molten incineration ash storage tank 8a, the melting furnace 14 The effect that it becomes possible to continue driving can be obtained.

ところで、以上の実施の形態に係る焼却灰の塩基度、重金属濃度の管理システムAcsにおいては、重金属がクロムである場合を例として説明した。しかしながら、クロムのみに限らず、例えば鉛、ヒ素、セレン、水銀等に対しても本発明に係る技術的思想を適用することができるから、クロムのみの用途に限定されるものではない。また、本発明の技術的思想を逸脱しない範囲内における設計変更等は自由自在であるから、上記実施の形態に係る形態に限定されるものではない。 Incidentally, the above basicity of ash according to the embodiment, in the management system A cs heavy metal concentration has been described a case heavy metal is chromium as an example. However, since the technical idea according to the present invention can be applied not only to chromium but also to lead, arsenic, selenium, mercury, and the like, for example, the application is not limited to chromium alone. In addition, design changes and the like within a range that does not depart from the technical idea of the present invention can be freely made. Therefore, the present invention is not limited to the embodiment according to the above embodiment.

本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムの模式的系統図である。1 is a schematic system diagram of a management system for basicity and heavy metal concentration of incineration ash according to Embodiment 1 of the present invention. 本発明の実施の形態1に係る焼却灰の塩基度、重金属濃度の管理システムの灰貯留槽への焼却灰の貯留手順説明図である。It is storage procedure explanatory drawing of the incineration ash to the ash storage tank of the basicity of the incineration ash which concerns on Embodiment 1 of this invention, and the management system of heavy metal concentration. 本発明の実施の形態2に係る焼却灰の塩基度、重金属濃度の管理システムの一部を示す模式的系統図である。It is a typical systematic diagram which shows a part of management system of the basicity of an incineration ash which concerns on Embodiment 2 of this invention, and a heavy metal concentration.

符号の説明Explanation of symbols

cs…焼却灰の塩基度、重金属濃度の管理システム
…廃棄物(下水汚泥)
1…焼却灰搬送装置
2…焼却灰分析装置
3…スクリュコンベヤ,3a…第1灰排出ライン,3b…第2灰排出ライン,3c…第3灰排出ライン
4…灰貯留装置,4a…第1灰貯留槽,4b…第2灰貯留槽,4c…第3灰貯留槽
5…灰切出し装置
6…焼却灰返送装置,6a…再調整焼却灰貯留槽,6b…再調整焼却灰切出し装置
7…調整剤供給装置
8…焼却灰供給装置,8a…被溶融焼却灰貯留槽,8b…被溶融焼却灰切出し装置
10…廃棄物供給装置,11…焼却炉,12…サイクロン,13…バグフィルタ,14…溶融炉
A cs ... Management system for basicity and heavy metal concentration of incinerated ash K m ... Waste (sewage sludge)
DESCRIPTION OF SYMBOLS 1 ... Incinerated ash conveying apparatus 2 ... Incinerated ash analyzer 3 ... Screw conveyor, 3a ... 1st ash discharge line, 3b ... 2nd ash discharge line, 3c ... 3rd ash discharge line 4 ... Ash storage apparatus, 4a ... 1st Ash storage tank, 4b ... 2nd ash storage tank, 4c ... 3rd ash storage tank 5 ... Ash extraction device 6 ... Incineration ash return device, 6a ... Readjustment incineration ash storage tank, 6b ... Readjustment incineration ash extraction device 7 ... Conditioner supply device 8 ... incinerated ash supply device, 8a ... melted incinerated ash storage tank, 8b ... melted incinerated ash cutting device 10 ... waste supply device, 11 ... incinerator, 12 ... cyclone, 13 ... bag filter, 14 ... melting furnace

Claims (7)

焼却炉から排出される廃棄物の焼却灰を溶融炉に供給するに際して、前記焼却灰の塩基度と重金属の重金属濃度とが予め設定した範囲になるように管理する焼却灰の塩基度、重金属濃度の管理方法であって、焼却灰の塩基度を分析する塩基度分析工程と、焼却灰の重金属濃度を分析する重金属濃度分析工程と、前記分析工程を経た焼却灰を分配して複数の灰貯留槽に供給して貯留させる焼却灰貯留工程と、前記各分析工程における分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰を各灰貯留槽毎に焼却炉に返送する焼却灰返送工程に振り分ける一方、前記各分析工程における分析により求められた塩基度と重金属濃度が共に条件を満たしている焼却灰を各灰貯留槽毎に溶融炉に供給する焼却灰溶融工程に振り分ける焼却灰振り分け工程とからなることを特徴とする焼却灰の塩基度、重金属濃度の管理方法。   When supplying the incineration ash of waste discharged from the incinerator to the melting furnace, the basicity and heavy metal concentration of the incineration ash are managed so that the basicity of the incineration ash and the heavy metal concentration of the heavy metal are within a preset range. A basicity analysis step for analyzing the basicity of the incinerated ash, a heavy metal concentration analyzing step for analyzing the heavy metal concentration of the incinerated ash, and a plurality of ash storages by distributing the incinerated ash having passed through the analyzing step The incineration ash storage process to be supplied to the tank and stored, and the incineration ash in which at least one of the basicity and the heavy metal concentration determined by the analysis in each analysis process does not satisfy the condition is incinerator for each ash storage tank While distributing to the incineration ash return process to be returned, the incineration ash solution for supplying the incineration ash to the melting furnace for each ash storage tank, both the basicity and heavy metal concentration determined by the analysis in each analysis process satisfy the conditions Basicity of ash, characterized in that comprising the ash distribution process for distributing the process, the management method of heavy metal concentrations. 前記重金属濃度分析工程で分析する対象は、全クロムであることを特徴とする請求項1に記載の焼却灰の塩基度、重金属濃度の管理方法。   The method for managing the basicity and heavy metal concentration of incinerated ash according to claim 1, wherein the object to be analyzed in the heavy metal concentration analysis step is total chromium. 前記焼却灰返送工程に振り分けられる焼却灰は塩基度が1.0を超える焼却灰であり、また前記焼却灰溶融工程に振り分けられる焼却灰は塩基度が1.0以下の焼却灰であることを特徴とする請求項1または2のうちの何れか一つの項に記載の焼却灰の塩基度、重金属濃度の管理方法。   The incineration ash distributed to the incineration ash return step is an incineration ash having a basicity exceeding 1.0, and the incineration ash to be distributed to the incineration ash melting step is an incineration ash having a basicity of 1.0 or less. The method for managing basicity and heavy metal concentration of incinerated ash according to any one of claims 1 and 2. 前記焼却灰返送工程に振り分けられる焼却灰は全クロム濃度が50,000mg/kgを超える焼却灰であり、また前記焼却灰溶融工程に振り分けられる焼却灰は全クロム濃度が50,000mg/kg以下の焼却灰であることを特徴とする請求項2または3のうちの何れか一つの項に記載の焼却灰の塩基度、重金属濃度の管理方法。   The incineration ash distributed to the incineration ash return process is an incineration ash having a total chromium concentration exceeding 50,000 mg / kg, and the incineration ash to be distributed to the incineration ash melting process has a total chromium concentration of 50,000 mg / kg or less. The method for managing basicity and heavy metal concentration of incineration ash according to any one of claims 2 and 3, wherein the incineration ash is incineration ash. 焼却炉から排出された廃棄物の焼却灰の一部の塩基度と重金属濃度とを分析する焼却灰分析装置と、分析された焼却灰を分配・供給する灰分配装置と、この灰分配装置により分配されて供給される焼却灰を貯留する複数の灰貯留槽を備えてなる灰貯留装置と、この灰貯留装置の複数の灰貯留槽のそれぞれから切出され、前記焼却灰分析装置による分析により求められた塩基度と重金属濃度のうち少なくとも一方が条件を満たしていない焼却灰を各灰貯留槽毎に焼却炉に返送する焼却灰返送装置と、前記焼却灰分析装置による分析により求められた塩基度と重金属濃度が共に条件を満たしている焼却灰を各灰貯留槽毎に溶融炉に供給する焼却灰供給装置とからなることを特徴とする焼却灰の塩基度、重金属濃度の管理システム。   An incineration ash analyzer that analyzes the basicity and heavy metal concentration of some of the incineration ash from the incinerator, an ash distribution device that distributes and supplies the analyzed incineration ash, and this ash distribution device An ash storage device comprising a plurality of ash storage tanks for storing the incinerated ash to be distributed and supplied, and a plurality of ash storage tanks of the ash storage device, each cut out and analyzed by the incineration ash analyzer An incineration ash return device that returns incineration ash whose at least one of the obtained basicity and heavy metal concentration does not satisfy the condition to the incinerator for each ash storage tank, and a base obtained by analysis by the incineration ash analysis device A management system for incineration ash basicity and heavy metal concentration, comprising an incineration ash supply device that supplies incineration ash that satisfies both conditions of the degree of ash and heavy metal concentration to the melting furnace for each ash storage tank. 前記焼却灰返送装置に、塩基度調整剤を供給すると共に、クロム濃度調整剤を供給する調整剤供給装置が設けられてなることを特徴とする請求項5に記載の焼却灰の塩基度、重金属濃度の管理システム。
理システム。
6. The basicity of incineration ash according to claim 5, wherein the incineration ash return device is provided with an adjustment agent supply device that supplies a basicity adjusting agent and a chromium concentration adjusting agent. Concentration management system.
Management system.
前記焼却灰返送装置に、塩基度調整剤とクロム濃度調整剤とが添加された塩基度、クロム濃度調整済の再調整焼却灰を貯留する再調整焼却灰貯留槽が設けられてなることを特徴とする請求項5または6のうちの何れか一つの項に記載の焼却灰の塩基度、重金属濃度の管理システム。   The incineration ash return device is provided with a readjustment incineration ash storage tank for storing the basicity to which a basicity adjusting agent and a chromium concentration adjusting agent are added, and the readjustment incineration ash having the adjusted chromium concentration. The management system for basicity and heavy metal concentration of incinerated ash according to any one of claims 5 and 6.
JP2006103334A 2006-04-04 2006-04-04 Method and system for managing basicity and heavy metal concentration of incinerated ash Active JP3833697B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006103334A JP3833697B1 (en) 2006-04-04 2006-04-04 Method and system for managing basicity and heavy metal concentration of incinerated ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006103334A JP3833697B1 (en) 2006-04-04 2006-04-04 Method and system for managing basicity and heavy metal concentration of incinerated ash

Publications (2)

Publication Number Publication Date
JP3833697B1 true JP3833697B1 (en) 2006-10-18
JP2007275724A JP2007275724A (en) 2007-10-25

Family

ID=37416141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006103334A Active JP3833697B1 (en) 2006-04-04 2006-04-04 Method and system for managing basicity and heavy metal concentration of incinerated ash

Country Status (1)

Country Link
JP (1) JP3833697B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117109011A (en) * 2023-09-25 2023-11-24 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) Addition amount optimization method for incinerator auxiliary agent

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009172495A (en) * 2008-01-23 2009-08-06 Mhi Environment Engineering Co Ltd Method of treating material comprising heavy metals by incineration, and incinerator for incinerating material comprising heavy metals
JP6091183B2 (en) * 2012-11-26 2017-03-08 太平洋セメント株式会社 Method for removing radioactive cesium and method for producing fired product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117109011A (en) * 2023-09-25 2023-11-24 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) Addition amount optimization method for incinerator auxiliary agent

Also Published As

Publication number Publication date
JP2007275724A (en) 2007-10-25

Similar Documents

Publication Publication Date Title
JP2010075897A (en) Apparatus for fly ash treatment, method for fly ash treatment, waste disposal system, and operation method for waste disposal system
RU2183682C2 (en) Agglomeration plant operation method
JP3833697B1 (en) Method and system for managing basicity and heavy metal concentration of incinerated ash
JP5022339B2 (en) Incineration ash melting method and equipment
JP7047488B2 (en) Exhaust gas treatment equipment and exhaust gas treatment method
JP5105993B2 (en) Detoxification treatment apparatus and method for treated ash
JP3944523B1 (en) Incineration ash melting method
JP4954646B2 (en) Incineration ash melting equipment
JP2002113327A (en) Method for controlling feed rate of desalting agent for exhaust gas
KR100300106B1 (en) Incinerator Melting System
KR200360956Y1 (en) ash treatment system by molten slag
JP2008000655A (en) Method for preventing elution of heavy metals in collected dust ash
KR100551619B1 (en) ash treatment method by molten slag and system thereof
JP2004077037A (en) Melting treatment method for incineration residue and its device
JP4015887B2 (en) Method for treating molten exhaust gas
JP4276533B2 (en) Method and apparatus for suppressing increase in organochlorine compounds in fly ash in waste treatment facility
JP2004074100A (en) Method of treating incineration ash
JPH10216670A (en) Treatment to change incineration ash or fly ash into harmless
JP3862940B2 (en) Fly ash treatment method
JPH11118138A (en) Melting treatment equipment
JP2007285583A (en) Waste treatment equipment
JP3455118B2 (en) Treatment method of molten fly ash or incinerated fly ash
JP2023131452A (en) Processing method of hexavalent chromium-containing ash and processing device of hexavalent chromium-containing ash
JPH11267601A (en) Melting treatment of incineration ash
JP2000001346A (en) Method for preventing heavy metal elution from slag

Legal Events

Date Code Title Description
TRDD Decision of grant or rejection written
A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060719

R150 Certificate of patent or registration of utility model

Ref document number: 3833697

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090728

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090728

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100728

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100728

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110728

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110728

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120728

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120728

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120728

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130728

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130728

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250