JPH07185501A - Method for sintering fly ash of fluidized bed incinerator - Google Patents
Method for sintering fly ash of fluidized bed incineratorInfo
- Publication number
- JPH07185501A JPH07185501A JP34581593A JP34581593A JPH07185501A JP H07185501 A JPH07185501 A JP H07185501A JP 34581593 A JP34581593 A JP 34581593A JP 34581593 A JP34581593 A JP 34581593A JP H07185501 A JPH07185501 A JP H07185501A
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- sintering
- fluidized
- ash
- product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 55
- 238000005245 sintering Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 238000007885 magnetic separation Methods 0.000 claims abstract description 4
- 230000003647 oxidation Effects 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- 239000002956 ash Substances 0.000 claims description 20
- 239000010801 sewage sludge Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 4
- 239000011802 pulverized particle Substances 0.000 claims 1
- 239000004927 clay Substances 0.000 abstract description 13
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000008187 granular material Substances 0.000 abstract description 3
- 238000009877 rendering Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 description 10
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 238000004898 kneading Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010828 elution Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007922 dissolution test Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、流動床式焼却炉飛灰を
焼結する方法に係り、特に、一般廃棄物である都市ごみ
を焼却処分する際に発生する流動飛灰を無害化させ、骨
材として使用することができる流動飛灰の焼結方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sintering fly ash in a fluidized bed incinerator, and in particular, detoxifies fly ash generated when incinerating municipal waste, which is a general waste. , A method of sintering fly ash that can be used as an aggregate.
【０００２】[0002]
【従来の技術】従来、流動飛灰の焼結方法は、特開昭５
３−８８６５７号、特開昭５６−１５０４７５号、特開
昭５８−３６９６９号、特開昭６３−２０１０５５号、
特開平２−１７５２０４号各公報等に見られる様に、灰
に粘土等を添加し混練成形工程を経て焼結する方法であ
った。従って焼結品を製造する際に新たに粘土等の資源
を消費する欠点があった。2. Description of the Related Art A conventional method for sintering fluidized fly ash is disclosed in Japanese Patent Laid-Open No.
3-88657, JP-A-56-150475, JP-A-58-36969, JP-A-63-201055,
As disclosed in Japanese Patent Application Laid-Open No. 2-175204, etc., it was a method of adding clay or the like to ash and performing sintering through a kneading and molding step. Therefore, there is a drawback that resources such as clay are newly consumed when manufacturing the sintered product.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、鉱物資源で
ある粘度等を用いることなく、従来埋め立て等で廃棄処
分をしていた焼却残渣を用いて、流動飛灰を焼結させる
ことにより骨材として再生利用できる流動飛灰の焼結方
法を提供することを課題とする。DISCLOSURE OF THE INVENTION The present invention aims to sinter fluid fly ash by sintering the fly ash using the incineration residue which has been conventionally disposed of in landfill, etc. without using the viscosity which is a mineral resource. An object is to provide a method of sintering fluidized fly ash that can be recycled as a material.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、本発明では、流動床式焼却炉飛灰、すなわち流動飛
灰を酸化焼結法により焼き固めて無害化させる流動飛灰
の焼結方法において、焼却炉の底部より排出される鉄屑
を磁選により除去した焼却残渣、すなわち不燃物（これ
にはガラス片、陶器片、石及び砂が大半を占める）の粉
砕品を、流動飛灰と混合し、造粒物を作成し、１０００
〜１３００℃にて焼結させることとしたものである。In order to solve the above-mentioned problems, in the present invention, a fluidized bed incinerator fly ash is burned, that is, a fluidized fly ash which is solidified by an oxidation sintering method to be harmless. In the binding method, the incineration residue obtained by removing iron scraps discharged from the bottom of the incinerator by magnetic separation, that is, crushed products of incombustibles (which mainly consist of glass pieces, pottery pieces, stones and sand) is flown. Mix with ash to make granules, 1000
The sintering is performed at 1300 ° C.
【０００５】前記の焼結方法において、不燃物粉砕品
は、流動飛灰に対する配合比が乾物重量基準で１０％〜
８０％であり、粉砕粒径が５００μ以下、好ましくは２
５０μ以下であるのがよい。また、本発明では、流動飛
灰に混合する粉砕品として、下水汚泥を高分子系凝集剤
を添加して脱水した脱水汚泥の焼却灰、すなわち汚泥焼
却灰を用いることができ、この場合、前記汚泥焼却灰の
粉砕品は、流動飛灰に対する配合比が重量基準で２０％
〜１００％であり、粉砕粒径が１００μ以下であるのが
よい。上記の焼結方法により得られる焼結物は、骨材と
して有効に利用することができる。In the above-mentioned sintering method, the combustible non-combustible product has a compounding ratio to the fluid fly ash of 10% by weight on a dry matter basis.
80% and the crushed particle size is 500μ or less, preferably 2
It is preferably 50 μm or less. Further, in the present invention, as a pulverized product to be mixed with the fluidized fly ash, incineration ash of dehydrated sludge obtained by dehydrating sewage sludge by adding a polymeric flocculant, that is, sludge incineration ash can be used. The crushed product of sludge incineration ash has a mixing ratio of 20% by weight to fluidized fly ash.
˜100%, and the crushed particle size is preferably 100 μm or less. The sintered product obtained by the above-mentioned sintering method can be effectively used as an aggregate.
【０００６】次に、本発明を詳細に説明する。まず、流
動床式都市ごみ焼却炉の飛灰及び不燃物の排出経路を以
下に説明する。流動床式都市ごみ焼却炉ではあたかも沸
騰水のようにバブリングしている６００〜８００℃に熱
せられた流動砂中にごみが投入され、乾燥、熱分解、焼
却し上部のフリーボード部で完全焼却される。燃焼排ガ
スの気流に乗って炉外に排出される飛灰は粒子終末速度
が燃焼排ガス気流速度以下のものと考えて良く、およそ
粒径で２００ミクロン以下となり鉄屑やガラス片や瓦礫
等の異物を含まない物である。Next, the present invention will be described in detail. First, the discharge route of fly ash and incombustibles of the fluidized bed type municipal solid waste incinerator will be described below. In a fluidized bed type municipal solid waste incinerator, waste is put into the fluidized sand heated to 600 to 800 ° C that is bubbling like boiling water, dried, pyrolyzed, incinerated, and completely incinerated at the freeboard section above. To be done. The fly ash discharged outside the furnace along with the flue gas stream may be considered to have a final particle velocity of less than the flue gas velocity of the flue gas, with a particle size of about 200 microns or less, and foreign matter such as iron scraps, glass fragments and debris. It does not include.
【０００７】一方鉄屑及び不燃物は、流動層底部に堆積
し流動砂と一緒に炉外に排出される。振動篩により鉄屑
及び不燃物は、流動砂と分離され流動砂は再び炉内に戻
される。鉄屑と不燃物は磁選機で分別される。この不燃
物は乾燥状態で排出されるので本発明の原料とするため
の粉砕、分別工程の前に乾燥工程は不要である。また、
高分子系下水汚泥焼却灰は粘土に近い組成であることを
見いだし、飛灰との混合物は実施例に示す様に塩基度の
調整結果により焼結操作温度（軟化点から融点の間）が
適切な温度域にあり、本焼結品も粘土焼結品と比較しな
んら遜色のないことが判明した。On the other hand, iron scraps and incombustibles are deposited on the bottom of the fluidized bed and discharged out of the furnace together with the fluidized sand. Iron scraps and incombustibles are separated from the fluidized sand by the vibrating screen, and the fluidized sand is returned to the furnace again. Iron scraps and incombustibles are separated by a magnetic separator. Since this non-combustible material is discharged in a dry state, the drying step is not required before the pulverizing and separating steps for use as the raw material of the present invention. Also,
It was found that polymer sewage sludge incineration ash has a composition close to that of clay, and the mixture with fly ash has an appropriate sintering operation temperature (between the softening point and the melting point) depending on the basicity adjustment results as shown in the examples. It was found that the temperature was in a wide temperature range, and this sintered product was no better than the clay sintered product.
【０００８】次に、本発明の焼結工程について説明す
る。焼結工程の構成は、不燃物の粉砕、分別工程、又は
高分子系下水汚泥焼却灰の粉砕工程と両者一方又は双方
と流動飛灰との混水、混練工程、造粒工程、焼結工程、
冷却工程からなり、図１にその構成例を示す。不燃物を
破砕機で粗破砕を行い、次に不燃物に若干含まれる鉄屑
を磁選により除去する。その後、振動篩等で非鉄金属及
び粗大物を除去し、粉砕機で粒径５００μ、好ましくは
２５０μに粉砕し、不燃物粉砕品を製造する。Next, the sintering process of the present invention will be described. The composition of the sintering step is crushing of incombustibles, separation step, or crushing step of polymer-based sewage sludge incineration ash, and mixing water with one or both of them and fluidized fly ash, kneading step, granulating step, sintering step. ,
It consists of a cooling process, and FIG. The incombustibles are roughly crushed by a crusher, and then iron scraps slightly contained in the incombustibles are removed by magnetic separation. Then, the non-ferrous metal and coarse particles are removed by a vibrating screen and the like, and the particles are pulverized by a pulverizer to a particle size of 500 μ, preferably 250 μ to produce a combustible non-combustible product.
【０００９】これに飛灰を混合し造粒操作に必要な水分
を添加し混練、造粒後、ロータリーキルン内に投入さ
れ、焼結温度１０００〜１３００℃にて焼結させる。焼
結品はロータリーシェルクーラーで冷後製品となる。高
分子系下水汚泥焼却灰の場合は粉砕工程後、以下不燃物
と同様の工程で焼結品が得られる。飛灰に不燃物粉砕品
と高分子系下水汚泥焼却灰粉砕品双方を添加してももち
ろん構わない。Fly ash is mixed with this, and water necessary for the granulation operation is added, kneaded, granulated, and then charged into a rotary kiln and sintered at a sintering temperature of 1000 to 1300 ° C. The sintered product becomes a product after being cooled by a rotary shell cooler. In the case of polymer-based sewage sludge incineration ash, after the crushing step, a sintered product is obtained in the same step as for the incombustible material. It is of course possible to add both the non-combustible pulverized product and the high-polymer sewage sludge incinerated ash pulverized product to fly ash.
【００１０】[0010]
【作用】本発明は、不燃物粉砕品又は高分子系下水汚泥
焼却灰の廃棄物を個々に又は同時に流動飛灰に添加し、
鉱物資源である粘土等を消費する事なく、焼結操作によ
り飛灰を骨材として再生利用するものである。すなわち
流動床都市ごみ焼却炉の不燃物がＳｉＯ2 主体の陶器
片、砂及び低融点の融剤になるガラス屑が殆どの成分で
あることに着目し、飛灰単独焼結の困難さを不燃物粉砕
品の添加により容易にさせ流動床都市ごみ焼却炉から排
出される飛灰と不燃物を原料とし焼結品を製造すること
ができたものである。The present invention adds pulverized products of combustible non-combustible material or waste of incinerated ash of polymer-based sewage individually or simultaneously to fluidized fly ash,
Fly ash is recycled as an aggregate through a sintering operation without consuming the mineral resources such as clay. That attention is paid to the fact incombustible material fluidized bed municipal waste incinerator SiO 2 mainly pottery pieces, glass debris becomes flux of sand and a low melting point is a most components, noncombustible the difficulty of fly ash alone sintering It was possible to manufacture sintered products using fly ash and incombustibles discharged from the fluidized bed municipal waste incinerator as raw materials, which can be easily done by adding crushed products.
【００１１】[0011]
【実施例】以下に実施例により本発明を具体的に説明す
る。 実施例１ （ａ）不燃物の物理組成例を表１に示す（単位：重量
％）。EXAMPLES The present invention will be specifically described below with reference to examples. Example 1 (a) An example of the physical composition of an incombustible material is shown in Table 1 (unit:% by weight).
【表１】 表１に示す様に陶磁器、ガラス、石砂がほとんどである
ことが判明した。[Table 1] As shown in Table 1, it was found that most of them were ceramics, glass and stone sand.
【００１２】（ｂ）飛灰、不燃物粉砕品、高分子系下水
汚泥焼却灰、粘土の組成分析と融点の一例を表２に示す
（単位：重量％）。(B) An example of composition analysis and melting point of fly ash, pulverized product of incombustibles, incineration ash of polymer-based sewage sludge, and clay is shown in Table 2 (unit:% by weight).
【表２】 [Table 2]
【００１３】表２に示す流動飛灰中にはごみ燃焼排ガス
中の塩化水素等酸性ガス除去のための消石灰が含有され
ており、塩基度（ＣａＯ／ＳｉＯ2 の重量比と定義す
る）は１．７８で軟化点、融点とも高く、焼結操作を困
難にしている。このような消石灰添加飛灰は排ガス規制
の強化とともに今後益々増加してゆくと考えられる。こ
のような高塩基度物質にＳｉＯ2 を多く含む粘土を添加
することにより塩基度が低下し、軟化点、融点を低下さ
せることが判明した。そこで、同様にＳｉＯ2 を多く含
む不燃物粉砕品である高分子性下水汚泥焼却灰粉砕品を
流動飛灰に添加したところ、同等の効果があることが判
明した。表３に示す。The fluidized fly ash shown in Table 2 contains slaked lime for removing acidic gases such as hydrogen chloride in the waste gas from the combustion of garbage, and has a basicity (defined as a CaO / SiO 2 weight ratio) of 1. The softening point and melting point are high at 0.78, which makes the sintering operation difficult. Such slaked lime-added fly ash is expected to increase more and more in the future with the tightening of exhaust gas regulations. It has been found that the addition of clay containing a large amount of SiO 2 to such a high basicity substance lowers the basicity and lowers the softening point and melting point. Therefore, when a pulverized product of high-polymer sewage sludge incineration ash, which is also a pulverized product of incombustibles containing a large amount of SiO 2 , was added to the fluidized fly ash, it was found that the same effect was obtained. It shows in Table 3.
【００１４】（ｃ）流動飛灰と各添加物の混練物の融点
測定結果を表３に示す（単位：℃）。(C) The melting point of the kneaded mixture of the fluid fly ash and each additive is shown in Table 3 (unit: ° C).
【表３】 ＊配合比は流動飛灰乾重量に対する各添加物の乾重量比 上段（ ）内は軟化点、下段は融点を示す。[Table 3] * The compounding ratio is the dry weight ratio of each additive to the dry weight of the fly ash. The upper part () shows the softening point and the lower part shows the melting point.
【００１５】表３より不燃物粉砕品、高分子系下水汚泥
焼却灰とも粘土と同様、流動飛灰に混合することにより
軟化点、融点を低下させる効果が認められた。不燃物粉
砕品が他の添加物に対して比較的少量で効果を発揮する
のは不燃物粉砕品にガラスが多量に含有されているため
と考えられる。From Table 3, it was confirmed that both the comminuted product of incombustible material and the incineration ash of high-polymer sewage sludge, like clay, have the effect of lowering the softening point and melting point by mixing with fluidized fly ash. It is considered that the non-combustible pulverized product is effective in a relatively small amount with respect to other additives because the non-combustible pulverized product contains a large amount of glass.
【００１６】（ｄ）流動飛灰＋不燃物粉砕品焼結テスト
結果 流動飛灰に２５０μ以下に粉砕した不燃物粉砕品を配合
比で５０％添加、加湿、混練、造粒後灯油バーナー焚き
内燃式ロータリーキルンで酸化焼結させた。表４に焼結
条件を示す。(D) Results of sintering test of fluid fly ash + pulverized product of incombustibles 50% addition of pulverized product of incombustibles pulverized to 250μ or less in fluid fly ash, humidification, kneading, granulation kerosene burner burning internal combustion It was oxidized and sintered in a rotary kiln. Table 4 shows the sintering conditions.
【表４】 得られた焼結品の材料試験結果を表７、環境庁告示第１
３号による溶出試験結果を表８に示す。[Table 4] The material test results of the obtained sintered products are shown in Table 7, Environmental Agency Notification No. 1
The results of the dissolution test according to No. 3 are shown in Table 8.
【００１７】（ｅ）流動飛灰＋高分子系下水汚泥焼却灰
粉砕品焼結テスト結果 流動飛灰に１００μ以下に粉砕した高分子系下水汚泥焼
却灰を配合比で６０％添加、加湿混練造粒後、灯油バー
ナー焚き内燃式ロータリーキルンで酸化焼結させた。表
５に焼結条件を示す。(E) Results of sintering test of fluid fly ash + polymer sewage sludge incineration ash pulverized product Sintering test result of fluid ash crushed to 100μ or less polymer sewage sludge incinerator ash at a mixing ratio of 60%, humidification kneading After the granules, they were oxidized and sintered in a kerosene burner-fired internal combustion type rotary kiln. Table 5 shows the sintering conditions.
【表５】 得られた焼結品の材料試験結果を表７、環境庁告示第１
３号による溶出試験結果を表８に示す。[Table 5] The material test results of the obtained sintered products are shown in Table 7, Environmental Agency Notification No. 1
The results of the dissolution test according to No. 3 are shown in Table 8.
【００１８】（ｆ）流動飛灰＋粘土テスト結果（比較試
験） 比較試験のため流動飛灰に粘土を配合比で１００％添
加、加湿後、混練造粒後灯油バーナー焚き内燃式ロータ
リーキルンで酸化焼結させた。表６に焼結条件を示す。(F) Fluid fly ash + clay test result (comparative test) For comparative test, 100% of clay was added to fluid fly ash in a blending ratio, after humidification, after kneading and granulation, oxidation burning was carried out in a kerosene burner-fired internal combustion type rotary kiln. Tied up. Table 6 shows the sintering conditions.
【表６】 [Table 6]
【００１９】得られた焼結品の材料試験結果を表７、環
境庁告示第１３号による溶出試験結果を表８に示す。Table 7 shows the material test results of the obtained sintered products, and Table 8 shows the elution test results according to the Environmental Agency Notification No. 13.
【表７】 材料試験結果より吸水率が３％以下になっておりＪＩＳ
Ａ５００１道路用砕石、ＪＩＳＡ５００５コンクリート
用砕石の規格を満足している。以上、添加物が不燃物、
高分子系下水汚泥焼却灰、であっても粘土と同様焼き固
めが十分で、良好な人工骨材が得られた。[Table 7] From the material test results, the water absorption rate is 3% or less JIS
It meets the standards for A5001 road crushed stone and JIS A5005 concrete crushed stone. As mentioned above, additives are incombustibles,
Even with high-polymer-type sewage sludge incineration ash, as with clay, it was sufficiently baked and solidified, and a good artificial aggregate was obtained.
【００２０】[0020]
【表８】 [Table 8]
【００２１】表８に示す様にＰｂが少量溶出するものが
あるが殆どの成分で検出限界以下となってる。Ｐｂの溶
出値も埋め立て基準３．０〔ｍｇ／リットル〕を大幅に
下回っている。以上のように流動飛灰の添加物として不
燃物粉砕品、高分子下水汚泥焼却灰を用いても粘土を添
加物として使用した焼結品と比較して、材料試験値及び
溶出試験値もなんら遜色ない結果が得られた。As shown in Table 8, a small amount of Pb was eluted, but most of the components were below the detection limit. The Pb elution value is also well below the landfill standard of 3.0 [mg / liter]. As described above, even if non-combustible crushed products as additives for fluid fly ash and sintered products using clay sewage sludge incineration as a additive are used, material test values and elution test values are Comparable results were obtained.
【００２２】[0022]
【発明の効果】本発明によれば、流動飛灰の焼結処理に
当って、従来使用していた鉱物資源である粘度等を用い
ることなく、今までは埋め立て処分しかなかった焼却残
渣である不燃物を用いて混合焼結するものであり、それ
によって得られた焼結物は無害化され骨材として有効に
再生利用できるものである。このように、本発明は、近
年になって年々その確保が困難になってきた最終処分場
の延命化、及び資源の有効利用及びリサイクル化の社会
的課題を満足させるまさに一石二鳥の方法と言える。EFFECTS OF THE INVENTION According to the present invention, the incineration residue that has been used only for landfill up to now without using the conventionally used mineral resource such as viscosity in the sintering treatment of fluidized fly ash. The material is mixed and sintered using an incombustible material, and the resulting sintered material is rendered harmless and can be effectively recycled as an aggregate. As described above, the present invention can be said to be exactly a method of two birds with one stone to satisfy the social problems of prolonging the life of the final disposal site, effective use of resources, and recycling, which have become difficult to secure year by year in recent years.
【図１】本発明の焼結方法を行う焼結工程の構成図。FIG. 1 is a configuration diagram of a sintering process for performing a sintering method of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 桝野 広二 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 金子 充良 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 井上 和之 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 村沢 譲 千葉県市川市南大野１丁目36番22号 (72)発明者 鈴木 照彦 東京都稲城市百村1621番３号 レジオン松 本203 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Koji Masuno, 11-11 Haneda Asahi-cho, Ota-ku, Tokyo Inside EBARA CORPORATION (72) Inventor Mitsuyoshi Kaneko 11-11, Haneda-Asahi-cho, Ota-ku, Tokyo Stocks Company EBARA MFG. (72) Inventor Kazuyuki Inoue 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside EBARA MFG. Co., Ltd. (72) Inventor Yuzuru MURAZAWA 1-32-22 Minamiono, Ichikawa, Chiba Inventor Teruhiko Suzuki 162-1 Hyakumura, Inagi-shi, Tokyo Region Matsumoto 203
Claims (4)
う）を酸化焼結法により焼き固めて無害化させる流動飛
灰の焼結方法において、焼却炉の底部より排出される鉄
屑を磁選により除去した焼却残渣（以下不燃物という）
の粉砕品を、流動飛灰と混合し、造粒物を作成し、１０
００〜１３００℃にて焼結させることを特徴とする流動
飛灰の焼結方法。1. A method for sintering fluidized fly ash, which comprises decompressing fluidized bed incinerator fly ash (hereinafter referred to as fluidized fly ash) by oxidation and sintering to render it harmless. Iron scraps discharged from the bottom of the incinerator. Incineration residue obtained by magnetic separation (hereinafter referred to as incombustible material)
The crushed product of is mixed with the fluidized fly ash to prepare a granulated product, and 10
A method of sintering fluidized fly ash, which comprises sintering at 00 to 1300 ° C.
配合比が乾物重量基準で１０％〜８０％であり、粉砕粒
径が５００μ以下であることを特徴とする請求項１記載
の流動飛灰の焼結方法。2. The fluidized product according to claim 1, wherein the comminuted product of the incombustible material has a compounding ratio to the fluid fly ash of 10% to 80% on a dry matter weight basis and a pulverized particle size of 500 μm or less. Method of sintering fly ash.
汚泥を高分子系凝集剤を添加して脱水した脱水汚泥の焼
却灰（以下汚泥焼却灰と呼ぶ）であることを特徴とする
請求項１記載の流動飛灰の焼結方法。3. The crushed product to be mixed with the fluidized fly ash is incinerated ash of dehydrated sludge (hereinafter referred to as sludge incinerated ash) obtained by dehydrating sewage sludge by adding a polymeric flocculant. The method for sintering fluidized fly ash according to claim 1.
対する配合比が重量基準で２０％〜１００％であり、粉
砕粒径が１００μ以下であることを特徴とする請求項３
記載の流動飛灰の焼結方法。4. The crushed product of the sludge incineration ash has a compounding ratio to the fluidized fly ash of 20% to 100% by weight and a crushed particle size of 100 μm or less.
A method for sintering fluidized fly ash as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34581593A JPH07185501A (en) | 1993-12-24 | 1993-12-24 | Method for sintering fly ash of fluidized bed incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34581593A JPH07185501A (en) | 1993-12-24 | 1993-12-24 | Method for sintering fly ash of fluidized bed incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07185501A true JPH07185501A (en) | 1995-07-25 |
Family
ID=18379175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34581593A Pending JPH07185501A (en) | 1993-12-24 | 1993-12-24 | Method for sintering fly ash of fluidized bed incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07185501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230287220A1 (en) * | 2020-08-14 | 2023-09-14 | Vecor Ip Holdings Limited | Process for preparing whitened fly ash |
-
1993
- 1993-12-24 JP JP34581593A patent/JPH07185501A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230287220A1 (en) * | 2020-08-14 | 2023-09-14 | Vecor Ip Holdings Limited | Process for preparing whitened fly ash |
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