JPS59203682A - Treatment of ash formed in coal-burning fluidized-bed boiler - Google Patents

Abstract

PURPOSE:To make the titled ash usable for reclamation disposal without the formation of environmental pollution, by kneading combustion ash collected by a dust collector out of combustion ash formed during burning a fluidized bed comprising coal and limestone with the specified amount of water to granulate it, and then maturing it in a CO2-contg. atmosphere. CONSTITUTION:In adopting a fluidized-bed combustion system comprising coal as fuel for a boiler or the like and limestone as a desulfurizing agent, formed combustion ash contains CaO and CaSO4 formed by desulfurization, and combustion ash esp. collected by an electric dust precipitator or a cyclone has the small efficiency of reclamation and causes the formation of environmental pollution because of the increase of the pH of excess water when it is used for reclamation. Therefore, said combustion ash is kneaded with sea or fresh water of 20-70% as the mixing amount of water, granulated to particle size of 2-30mm. and then matured in a CO2-contg. atmosphere for 0.1-24hr. Hence, the efficiency of reclamation is enhanced, and the surfaces of incorporated CaO and Ca(OH)2 are reacted with CO2 to form a CaCO3 coating layer. Consequently, the amount of an alkali component exuding in sea water is reduced to eliminate the cause of environmental pollution.

Description

【発明の詳細な説明】 木発Ｉｙｌ　）：ｉ、燃ｔ１・である石炭灰および脱イ
流剤である（１灰百より、（・、’？Ｅ成さｉする流！
、ｌ１１１床における流σｖ７床燃・）、１°ｆ：の１
髭に発生する石、Ｈ５＜灰および脱イ流済脱イ流剤より
なる流ｐｉｌｌ床燃焼灰の海水域への埋立匙分、捷たは
投棄処分方法、詳しくは流動床燃焼灰に加湿造わγ処理
を施し粒状の成形体とした後に炭８ツがス含イＩ雰囲気
での養生を施すことによつこ、埋立処分時の埋立効率（
Ｄｒｙ　−ｔ　／ｎ？　：灰処分場単位体槓当りに処分
し得る流ｎの床燃焼灰知）を向上させるとともに処分場
内の浸偵面水のｐＨを刹ト水基準における規制価１ノ１
の９０以下に維持することを特徴とする７ｔ　！Ｉσ１
床燃焼灰の処理方法にＩ釣する・ものである。[Detailed Description of the Invention] Wood Iyl): i, coal ash that is combustible t1.
, flow σv7 bed combustion in l111 bed), 1°f: 1
Stones generated in the beard, H5< ash, and deionized desilting agent. Landfilling, crushing, or dumping disposal methods in the seawater for pill bed combustion ash, which is made of desilting agent. By applying γ treatment to form granular compacts and curing them in an atmosphere containing 8% charcoal, the landfill efficiency (
Dry-t/n? : Improving the flow rate n of bed combustion ash that can be disposed of per unit ash disposal site, and increasing the pH of the surface water in the disposal site to the regulatory value 1 No. 1 according to the ash water standards.
7t, which is characterized by maintaining the temperature below 90! Iσ1
I am interested in the method for disposing of bed combustion ash.

近年我国においては、ｌ　９７０４４−代の石Ａ４１危
機以来の国際的な石油供給不安に対処すへく、石油代打
エネルギーの開発が国家的な課題とｙｚ　リ、その一つ
と［７て石炭エネルギーがクロースアップさり、ている
。石炭を燃料・とする際の燃焼方式は従来微粉炭燃焼方
式が中心であったが、最近新しい燃焼力式として流動床
燃焼か注１ヨｌされている。これは燃刺１である石炭と
炉内脱砒のための脱硫剤である石灰石を投入しボイラ内
にて流動床を構成させる／ｉ式である。流動床燃焼方式
は従来の微粉炭燃Ｂ＋’、Ｗ□方式に較べて第１に炉容
積が小さくて広みボイラ答槓が小さくなること、第２に
燃料石炭の品種しご１５・、ｊする制約が少ないこと、
イ１１．３に７５０〜９５０℃の低温燃焼が可能であり
サーマルＮＯｘの発生が少ないこと、第４に伝熱木管表
間での総括伝熱除数が大きいこと、などの欠所を慣して
いる。一方一？４ｔ’、　０ＬＩＩ床燃焼の実用化に関
する課諭の一つに？＆　Ｒυ１床ａ床入煙灰イ〕の取１
１性に、ＩＣ因する灰処理−ヒの問題がある。１・％ｒ
、　！ｌ１１１床燃焼灰は（、’Ｌ朱の微粉炭燃焼灰と
比軟し゛Ｃ１燃焼温度が低く未溶融灰であることならひ
に生石灰（Ｃａｂ）、１１型無水センフウ（Ｃａ５Ｏ，
＋　）よりＩＪｙ、、るハ’：：：　！＋１１０斉ｊ１
・１１１．稙剤を含イ■することが主たる４．１徴であ
る。In recent years, in our country, in order to deal with the international oil supply instability that has been occurring since the 197044-A41 crisis, the development of petroleum pinch energy has become a national issue, and coal energy is one of them. It's a close-up. Conventionally, pulverized coal combustion has been the main combustion method when coal is used as fuel, but fluidized bed combustion has recently been introduced as a new combustion method. This is an /i type in which coal, which is the fuel sting 1, and limestone, which is a desulfurization agent for dearsenizing the furnace, are introduced to form a fluidized bed in the boiler. Compared to the conventional pulverized coal combustion B+', W□ method, the fluidized bed combustion method has two advantages: firstly, the furnace volume is smaller and the boiler space is smaller, and secondly, the type of fuel coal is different. There are fewer restrictions on
(11.3) Low-temperature combustion of 750 to 950°C is possible and little thermal NOx is generated, and (4) the overall heat transfer divisor between the heat transfer wood pipe surfaces is large. There is. One on the other hand? 4t', 0LII One of the lecturers on the practical application of bed combustion? &Rυ1 floor a floor smoke ash a] no.1
First, there is the problem of ash disposal due to IC. 1・%r
, ! L111 bed combustion ash is comparatively softer than pulverized coal combustion ash of 'L vermillion.C1 combustion temperature is low and the ash is unmelted, then quicklime (Cab), Type 11 anhydrous senfu (Ca5O,
+) from IJy,,ruha':::! +110 Qi j1
・111. Containing a thickening agent is the main symptom 4.1.

従来−我国において発生する石炭灰の大部分に微粉炭燃
か°ｒによろものであり、その−１５４％はセメント混
相（４−セノシＩ−１５，”−ＰＩ寺に自利１１１され
、伐りは埋立処分もしくは投棄処分に供されていた。し
たがって−７１ｅ、動床燃焼灰においＣも同様に資源と
してのイ」効刊■ｌｌ　ｈらびに埋立処分などが考乏ら
れるものの、流ｊｉ１．ｌ床燃・）、＋１＋、灰の固イ
１の特性を充分に考慮した独自の有効利■１１もしくは
処分方式の確立が流動床燃焼ボイラの実ＩＩ化にとって
きわめて重要であり、とくに、流動床燃焼灰の太ｈ１処
理にとっては、まず埋立処分もしくは投棄処分を円滑に
実施し６Ｊ、る技術の確立が不Ｏｆ犬である。流動床燃
焼灰の埋立処分もしくは投棄処分の際の、流動床燃焼灰
の固有の特性に起因する主たる問題点は、第１に燃焼温
度が低く未溶融灰であるため形状が非球状であり、埋立
効率が小さいこと、第２に脱硫ｌ庁１１１＋＋；硫剤中
には未反応の生石灰が存仕し、流動未燃１、ｖＢ灰には
通常５〜３０重量％の生石灰が含有され、この大量のア
ルカリ成分のため埋立処分地などにおける埋立時の余水
のｐＨが上昇し、余水を公共用水域に排出する際にはｐ
Ｈ対策が必要なことである。Traditionally, most of the coal ash generated in our country is from pulverized coal combustion, and -154% of it is mixed with cement (4-Cement mixed phase) Therefore, -71e, C in the moving bed combustion ash is also considered as a resource. It is extremely important to establish a unique effective method ■11 or disposal method that fully takes into account the hardness characteristics of ash. In order to dispose of ash, it is first necessary to establish a technology that can smoothly carry out landfill or dumping disposal. When disposing of fluidized bed combustion ash in a landfill or dumping, the main problems caused by the unique characteristics of fluidized bed combustion ash are: firstly, the combustion temperature is low and it is unmelted ash, so the shape is non-spherical; The second reason is that the reclamation efficiency is low, and the second reason is that unreacted quicklime exists in the desulfurizing agent, and fluidized unburned 1,vB ash usually contains 5 to 30% by weight of quicklime. Due to the large amount of alkaline components, the pH of leftover water at landfill sites increases, and when the leftover water is discharged into public water bodies, the pH level increases.
Measures against H are necessary.

通常、流！Ｉｖノ床燃燻燃焼灰の発生系統によって燃焼
炉オーバフロー灰と集塵機捕集灰（サイクロン族、電気
集塵灰）に区分される。これらの発生箇所における発生
燃焼成因の割合は流ｍ１床燃焼の際の燃焼システム、運
転条件によって大幅に異なるものの大路次の如くである 燃焼炉オーバ７０−灰　０〜４０　ｗｔ％ダーイクロン
灰　　　　　３０〜６０ｗｔ％宙気集ｊ嗜灰　　　　　
３０〜４０ｗｔ％このうち、燃す１”Ｌ炉到−パフロー
灰は通常攻ｔｉｎｔの塊状であり、狸３ア効率は１４〜
Ｌ５Ｄｒｙ−Ｌ／ツノｌ゛と大きい。１だ、アルカリ１
皮分の溶出速度が小さいたｄ〕、ｊｌｌ常埋立処分など
における浸＆、１　ｙｂＦ水のｐＨは９０以下である。Usually flow! Depending on the generation system of Iv bed combustion ash, it is divided into combustion furnace overflow ash and dust collector collected ash (cyclone group, electrostatically collected ash). Although the proportion of combustion components generated at these locations varies greatly depending on the combustion system and operating conditions during flow m1 bed combustion, it is as follows. % air collection j shuhai
30~40wt% Of these, the 1"L furnace-purified ash that is burned is in the form of a lump of normal attack tint, and the Tanuki 3A efficiency is 14~40wt%.
L5Dry-L/Large horns. 1, alkaline 1
Because the elution rate of the skin is low, the pH of 1 ybF water in regular landfill disposal is 90 or less.

このため、燃焼炉オ・−／＜７０−灰ｒ」その１甘の状
１慈で埋立処のもしくｉ−を投棄処分に供−１″ること
ができる。一方、巣）ノ１すｉ叔抽集灰（ヅーイクＶ１
シ灰、？１７）気集１楊灰）はノＩＩＩ　′ｉ□ヤ数７
１〜数−ト／Ｉの微細オ゛１γ子であり、未溶融灰のた
め形状が非球状でＡ６す、埋立効率は０．２〜０．５１
）ｒ　ｙ−ｔ　／　ｎｆと相当に小さい。因に−ｊＪＩ
・ｉｊＸ；の微粉炭燃・Ｌ■１″灰の埋１ン効率は約０
．８　Ｄ＋−ｙ−ｔ　／　ｎｆである。なおここで埋立
処分１１４などの１〆１りの〕１１立効率は通１１４’
−突き固め、ｌ賦圧、振１ｉｉ１１なとの処１ｉ、７を
ｈｉシさない１ｄのカサ密度に相当する。For this reason, it is possible to send the waste from the landfill to disposal by using the combustion furnace. i-shu extract ash (zuiku V1)
Ash,? 17) Kishu 1 Yang Hai) is NoIII 'i□Ya number 7
It is a fine particle of 1 to several tons/I, and because it is unmelted ash, the shape is non-spherical and A6. Landfill efficiency is 0.2 to 0.51.
) ry-t/nf, which is quite small. Incidentally-jJI
・Pulverized coal combustion of ij
．． 8 D+-y-t/nf. In addition, here, the landfill efficiency of 1〆1〆, such as 114, is 114'.
- It corresponds to the bulk density of 1d, which does not include 1i and 7 in tamping, applying pressure, and shaking 1ii11.

このため、Ｊｌｌｊｌｌ生立測定方法は、粉体ではＪＩ
Ｓ５１０１８こ７’ｌｌ拠したものであゆ、′！１γ状
物、塊状物でに１１然落下ｄ、Ｉ；　１ハにて冠に一ξ
中に充ｊｐ、シ測定したものである。すなわち埋立効率
の測定フｌ法は、カサ１１１１１５Ｊｌ器を水平にし、
漏斗台に漏十を収り付け、漏１十、にふるいを載せ、こ
の漏５１・の下方において、・ツ・器を受器台に正しく
重ね、試料の１さじをふるいの−にに）威せ、これを幾
分かた口の小はけでふるいの全面を一様に軽くふいて試
Ｙトを分散落士させ、イ１１ｊ斗を経て受器に受け、試
料が受器に山盛りとなる寸でこの操作を繰り返し、次に
一辺が直線のへらで山の部分を削り収った後、受器の自
答物の質：１１ヲはか杓、次式により埋立効率を求める
ものでｉｌＭ、　１．：ｉＪ、Ｉ未燃焼灰ｔ１βノスシ
リンター中へ自然落下ｅ〈−で充填し一充填した流動床
燃焼灰重量（ただしｊ１゛３粒処理前の減成＠）および
具用の体積を測定し、次式によりカサ密度（埋立効率に
ｌ＋１当する）を求Ｉｔｌ　’４　＋ｆｉｒが大幅に短
縮されるとともに、処分場へのｌＩ前送の１県の１−ラ
ンクなどのイイ槓効率が１シ（ドし、搬送費用１が増加
する。甘だ、−集１ｆ、ｉ↓機抽集灰１」１款細な／ζ
ｄ）表面積が人きくなｌ】かつ処分坊１ｆなどでの間水
域における沈降速度が小さぐ、埋立処分せたは投４５処
分の際に流りυ１床燃焼灰からのアルカリ成分の溶出匍
が大となり、ｉｎ常ｌφ潰間゛水のｐＨは９〜１１とな
る。浸漬海水を、ｉ＋ｊノ域などの公共用水域に排出す
る除の水質は水質汚濁防止法に基つぐ排水基ン１【−に
よつこＩ）Ｈ５，０〜９０と規制されており、中和処理
などの対策が不町人である。またｉｆｌ常の微粉炭燃焼
１・・（のμｍ！立処分などにおいては粉塵防止のため
混水ｈ１２０〜３０％の水分の１へ加による加イ；１迅
処理または加ｉ！Ｉ′１混純処理が実施されており、流
動床燃焼灰の埋立処分などＱこおいても同様の加湿処理
才／ζは〃１１　ｉ！ｉｉ！、混練処理が考えら）′し
る。しかしながら、流！Ｉυ１斥勉焼の加＋１ｉｉｊ処
理寸たは加４＋−＋ｊ混練処理は粉塵防止にｖ、ｒｔカ
果的であるが、埋立効率の向上ならびに埋立処分地など
における浸偵面水のｐＨ抑制には伐り果がｌあめらｎな
い。すなわち〜混水ｊ’、ｊ、　ｌ　Ｑ〜６０％での加
ｔＩＦ処理捷たは力１月１１１」混練処理でに、埋立効
率（ｄ粉体状鹿と（・まとＸ、と差異がなく、また埋立
処分地などＶこおける浸ム！ｉ′１１σ水のｐＨについ
ＣもｐＨの（」４１制効果に認められずむしろｐＨが」
二昇することもある。このたｒ−流動床燃焼灰のうち集
塵機捕集１・ｋ（サイクロン族、電気集塵灰）の円滑な
る埋立処分捷たは投棄処分にとっては、簡素な操作でか
つ安価に流動床燃焼灰の埋立効率を増大させ、かつ埋立
処分地などでの浸漬海水のｐＨを排水基準における規制
値内に抑制する処理方式が望まれている。For this reason, the Jlljll growth measurement method is
This is based on S51018. 1γ-shaped object, lumpy object fell d, I; 1ξ on the crown in 1c
The measurements were taken while filling the inside. In other words, the full method for measuring landfill efficiency is to level the umbrella 111115Jl,
Place the sieve on the funnel stand, place the sieve on the funnel 10, place the vessel correctly on the receiver stand below the funnel 51, and pour 1 scoop of the sample onto the sieve.) Then, lightly wipe the entire surface of the sieve with a small brush with a slightly parted opening to disperse the sample. Repeat this operation until the size becomes , and then use a spatula with a straight side to scrape away the peaks.The quality of the container's natural material: 11. The landfill efficiency is calculated using the following formula. ilM, 1. : iJ, I Unburnt ash t1β Filled into the nossylinter by gravity e<-, the weight of one filled fluidized bed combustion ash (however, j1゛degradation before 3 grains treatment @) and the volume of the ingredients were measured, and then By using the formula, it is possible to significantly shorten the bulk density (which corresponds to l+1 to the landfill efficiency), and also to reduce the good evacuation efficiency, such as 1-rank of 1 prefecture for lI forwarding to the disposal site, to 1 si (d). However, the transportation cost increases by 1. That's too sweet.
d) The surface area is small and the sedimentation rate in the water area at the 1st floor of the disposal shed is low, and the elution of alkaline components from the flow υ1 bed combustion ash during landfill disposal or disposal is low. The pH of the incubating water becomes 9 to 11. The quality of water when immersed seawater is discharged into public waters such as areas i+j is regulated to be 5,0 to 90, based on the Water Pollution Control Act. Measures such as processing are unfavorable. In addition, ifl regular pulverized coal combustion 1...(μm! In order to prevent dust in vertical disposal, etc., the mixed water h120-30% water is added to 1; 1 quick treatment or addition i! I'1 mixed. Pure treatment has been carried out, and the same humidification treatment time/ζ is 〃11i!ii!, kneading treatment is considered)' in cases such as landfill disposal of fluidized bed combustion ash. However, flow! The addition of Iυ1 kneading + 1iij processing or addition 4+-+j kneading is effective in preventing dust, but it is effective in improving landfill efficiency and controlling the pH of surface water at landfill sites. There is no harvested fruit. That is, ~ mixed water j', j, l In addition, there is no effect of pH (41) on the pH of water in landfill sites and other places where water is soaked.
Sometimes it goes up two levels. For smooth landfill disposal or dumping of dust collector collection 1/k (cyclone group, electrostatic precipitated ash) among r-fluidized bed combustion ash, it is possible to collect fluidized bed combustion ash easily and at low cost. There is a need for a treatment system that increases landfill efficiency and suppresses the pH of immersed seawater at landfill sites and the like within the regulated values in wastewater standards.

本発明は」二記の諸点に鑑み、流動床燃焼灰の埋立処分
才たは投棄処分を円滑に実施すべく、埋立効率の向」二
ならびに浸漬海水のｐＨを規制値以下に抑制することを
目的としてなされたもので、燃料としての石炭および脱
硫剤としての石灰石より構成きれる流動床において流り
ｖ１床燃焼の際に発生する石炭灰および脱硫法脱硫剤よ
り成る流−１床燃焼ドックを埋立処分または投棄処分す
る際に、混水煽（粉体１００重１１％に対して添加する
水の重（ｉ１％）２０〜７０％、望ましくは３０〜６０
％となるよう、１１Ｊ水寸たに淡水を流りυ１床燃・ｊ
、１′Ｐ灰Ｖ添加しつつ、造粒匙」８１１を施１−１つ
いで炭（Ｎ文カス含有雰囲似（、、Ｈ；す酸ガス濃度二
１〜１００％）中にて０．１〜２４時間ユｈ生した後に
一理立処分また″は投棄処分することを４、：ｆ６′ｌ
とする石炭焚流Ｕυ１床ボイラ発生灰の処理方法をＪ、
ｊｊｉ供するものである。In view of the following points, the present invention aims to improve the landfill efficiency and to suppress the pH of immersed seawater below the regulatory value in order to smoothly carry out the landfill disposal or dumping of fluidized bed combustion ash. This was done for the purpose of landfilling a 1-bed combustion dock consisting of coal ash and desulfurization agent generated during 1-bed combustion in a fluidized bed consisting of coal as a fuel and limestone as a desulfurization agent. When disposing or dumping, mix water (weight of water (I1%) added to 100 weight of powder and 11%) of 20 to 70%, preferably 30 to 60%.
%, flow 11 J of fresh water and burn υ1 floor.j
, 1' While adding P ash V, a granulating spoon 811 was applied 1-1, and then 0.0. 4. After 1 to 24 hours of incubation, disciplinary action or "dumping" is to be carried out.
J.
This is what we offer.

以下、本発明の４’７ｆｔ成を詳細に脱り１する。捷ず
流Ｉｔ１．１床燃ｊ：＋ｌｉ、灰の加ｉ！：ｌ　ｊ’ａ
ｊオ′１γにおいてオｄ１γ過程時に生しる工密作ｒｔ
ｉ　６ごよって３？４粒物の空隙率が小さくなり埋立り
υ・オくが増大する。才だ＋＊、　１ｌｉｌ＋床燃ハ゛
１゛灰中の脱硫１６１兄＋Ｉｔｒ＋ｌ＋に古捷ｆ’Ｌる
生石灰、１し］Ｉ４無水センコクの水分イア扛下での自
Ｌ！、ＩＡ）結性によつＣ１造粒直後においても（閏ｎ
ｉ’ｆｉ、ハンドリングなどの１ジ１蚤に崩壊しない（
呈１斐の１戊４戒ｒＩＸ１１通度を発１見する。な丸’
　Ｊｐｉ：　ｌｉト葦作ｒ糸の１１、゛１間経過ととも
に１ｍ、す１床燃ｂ′Ｌ灰中の成分の水和反応によって
エトリンガイト（３，ＣａＯ・Ａβ２０．・３ＣａＳＯ
４・３２Ｈ２０）が生Ｉｔ　Ｌ−造粒物の強度はさらに
増加する。このように−流ｊ１１１１床燃４Ｙ＆灰にそ
の固有の仲秋により、１ｉ６ｉ　９．ＩなｊＢ粒操作に
よって埋立効率が火きくなる。寸た流１０１床燃焼灰の
ｊ％ｉ粒処理後の炭酸ガス合有界囲気中での養生によっ
て浸ｔｊｉ７１＋ｒ水のｐ　Ｈが９０以下と低いのは次
の現象によるものである。Hereinafter, the 4'7ft structure of the present invention will be explained in detail. Shozuryu It1.1 floor burn j: +li, addition of ash! :l j'a
The manipulation rt that occurs during the Od1γ process in jO′1γ
Due to i6, the porosity of 3-4 grains becomes smaller and the amount of landfilling υ・ok increases. 1 lil + 1 lil + bed combustion 1 ゛ desulfurization in ash 161 brother + Itr + l + old f'L quicklime, 1] I4 anhydrous senkoku's moisture ia removal! , IA) Even immediately after C1 granulation due to coagulation (interruption n
I'fi, handling, etc. will not collapse one by one (
Discover the 1st and 4th precept rIX11 degree of presentation. Namaru'
Jpi: With the passage of 11 hours and 1 hour of lit reed production, ettringite (3,CaO・Aβ20.・3CaSO
4.32H20) but the strength of the raw It L-granules increases further. Thus - flow j1111 floor combustion 4Y & ash due to its unique mid-autumn, 1i6i 9. Landfill efficiency will be increased by I/jB particle operation. The reason why the pH of the immersed tji71+r water is as low as 90 or less due to curing in a carbon dioxide-containing atmosphere after treatment with j%i grains of the 101-bed combustion ash is due to the following phenomenon.

（１）造粒処理によって表面積が小さくなるとともに処
分地などでの河水域での沈降速度が大きくなり、〃１．
動床燃焼灰からのアルカリ成分の浮手解量が小きくなる
。(1) The granulation process reduces the surface area and increases the sedimentation rate in river bodies at disposal sites, etc.
The amount of alkaline components decomposed from the moving bed combustion ash becomes smaller.

（２）流動床燃焼灰中の成分と水分による水和反応によ
ってエトリンガイトが生成し生石灰の一部が固定される
とともに、このエトリンガイ１−によって生石灰などの
アルカリ成分が封じこめられる。(2) Ettringite is produced by a hydration reaction between components in the fluidized bed combustion ash and moisture, and a portion of quicklime is fixed, and alkaline components such as quicklime are confined by this Ettringite 1-.

に３１造粒処理後の炭酸ガス含イー］雰囲気中での養生
によって造粒物の表面層の生石灰、消石灰が炭酸（１１
され、炭酸カルシウムの皮膜が形成され、内部のアルカ
リ成分を飼じこめることができる。なお１ｉ１目、Ｌ物
の粒径は２〜３　Ｑ　＋Ｊ＋、望ましくは３〜１０Ｉ５
．〃ｌが最適である。By curing in an atmosphere, the quicklime and slaked lime on the surface layer of the granules become carbonic acid (11
A film of calcium carbonate is formed, which traps the alkaline components inside. In addition, the particle size of 1i1, L material is 2 to 3 Q +J+, preferably 3 to 10I5
．． 〃l is optimal.

ここで、流動床燃焼灰の加湿造粒に使用される１”＋杭
機は、通常市販されている各種の造粒機が適１１１でき
るものの、成形性、設備費ならびに保守維持性を渚１市
すれ（ｒＪ２．１云１１υ１曲１１ｉ１１造粒我−ドラ
ム型ｊｂ−λ′立１戊−ゾリケツ１−埠ＩＶ王糸（ｔ　
ｊ’＋：１オフ１４ｉ！が望外しい。ここで、Ａ、’Ｌ
　酸ガス含イ１隅、１）ｌｉ　％とｌ−”ｉ’　Ｉｔ−
１通常］、　Ｏｑ６程度の炭＋ｉ！２カスを含イ〕する
ボイラ１ｌｉ１１カスがｊ蔚ｊ月１１丁ｒ肚であり、コ
スト的Ｖ′Ｃもイ〕刊である。なお炭酸ガス含イ１雰囲
気による養生ｔｌＪｌの温度は常温でも良好な効果を］
、）する、が約１００℃以下であれは養生時のＷ６ｉノ
（！を−１−ｙ７させることによって養生時間をタイ、
１細することができる。Although various commercially available granulators are suitable for the 1"+ pile machine used for humidified granulation of fluidized bed combustion ash, it is necessary to Ichisure (rJ2.1Yu 11υ1 song 11i11 Granulation I-Drum type jb-λ' tate 1 戊-Zoriketsu 1-Bu IV Wang thread (t
j'+: 1 off 14i! is disappointing. Here, A, 'L
One corner containing acid gas, 1) li % and l-"i' It-
1 normal], about 6 Oq of charcoal + i! The boiler 1li11 containing 2 scraps is 11 tons, and the cost V'C is also 1. In addition, the temperature of curing tlJl in an atmosphere containing carbon dioxide gas has good effects even at room temperature]
, ), if the temperature is below about 100℃, the curing time can be tied by setting W6i (! to -1-y7) during curing.
It can be made one thinner.

このように末完り１のＬＩ的とするところはｌＡｒ：　
ｉｆυＩＬ（り燃焼灰の力１目、忙追ｆ粒後炭酸カス合
有雰囲気に養生することによつＣ５流動床燃焼灰の埋立
効率を向−１ニさせるとともに７２１’ｌ［ｆ　＋１１
１水のｌ）Ｈを９０以下とするところにある。In this way, the LI-like part of end 1 is lAr:
IfυIL (The power of combustion ash is 1, by curing it in an atmosphere containing carbon dioxide scum after the combustion ash, the landfill efficiency of C5 fluidized bed combustion ash is increased by -12 and 721'l [f +11
1) H of water should be 90 or less.

つきに、ワ、施例および比較例について説ｆｌ］する。Finally, we will explain examples and comparative examples.

実施例および比較例に１」４いた流１ｊ１１１床燃・焼
灰のＩ’！Ｉｔ成成分は表］の如くである、流動床燃ハ
゛Ｌ灰の埋立効率の＋１ｌｌｌ定方法および流！１υ１
床燃焼未燃粒物の埋立効率１１１１１定力法は前述の方
法を月４いた。捷た流（肋未燃ハ゛ｒ灰浸７自１１ｉｊ
水のｐＨ測定方法は、１４月１メスシリング−中に海水
９００バｔを注入し、上部より流１１ｉ１１ｆｌＥ燃焼
灰（加湿混練物、造粒物）ｉｏｏ２を間然落下させた後
にｐＨを測定する方法を用いた。Flow 1j111 bed combustion/burning ash I'! The components are as shown in the table. Method for determining the landfill efficiency of fluidized bed combustion ash and its flow rate! 1υ1
Landfill efficiency of bed-burned unburnt particles 11111 The constant force method was compared to the above-mentioned method 4 times a month. Dissolved flow (rib unburnt ash immersion 7th 11ij
The method for measuring the pH of water is to inject 900 tons of seawater into a 14/1 meshilling, and then measure the pH after a stream of 11i11flE combustion ash (humidified kneaded product, granulated product) ioo2 is allowed to fall from the top. was used.

表　　　　　１ 実施例１〜３ 表１に示す燃焼灰Ａ、Ｂ、Ｃを転動皿型造粒機（細径１
２ｎ）を用いて造粒した。造粒条件は表２に示す如くで
あった。造粒物は粒径３〜６門であり、この造粒物を高
さ２ｍの所からコンクリート床上に落下しｒも全く破壊
しなかった。Table 1 Examples 1 to 3 The combustion ashes A, B, and C shown in Table 1 were processed using a rolling plate type granulator (small diameter 1
2n). The granulation conditions were as shown in Table 2. The granulated material had a particle size of 3 to 6 particles, and when the granulated material was dropped from a height of 2 m onto a concrete floor, it did not break at all.

（以下余白） 表　　　　　２ 表２にオやける燃焼灰Ａを炭酸ガス１０％合有空鍼にて
常？Ｍｌ（で１時間：Ｊｌｊｌ−生したｙ５合を実施例
１、燃焼灰Ｂを１１：ｔ　ｉｊ％Ｆガス１０％含イＡ空
気にＣ’ｉ’＋τ温で１時間う・°・生した、巴合を実
類例２、惣煙灰Ｃを炭酸ガスｌＯ％／；　ｊ（−＋を俵
にて常温で１０時間養生した場合針り”　ｈｌら＋”ｌ
ｌ　３と１１、」・す］γりυ率ケ求めると表３σ月へ
１〈であつンζ。(Leaving space below) Table 2 The burnt ash A shown in Table 2 was always used with a 10% carbon dioxide gas acupuncture needle. Ml (for 1 hour: Jljl- The raw y5 mixture was heated in Example 1, and the combustion ash B was heated in A air containing 10% F gas for 1 hour at C'i' + τ temperature. , Practical example 2, ``Hl et al + ''l when soybean ash C is cured at room temperature for 10 hours in a straw bale.
l 3 and 11, ``・su] γri υ rate ke is found in Table 3σ month 1〈atatsun ζ.

比１１；：＜　Ｂｉｔ　）、〜３ ｐ　ｌ　Ｋ示ｆＷ、ＱＪｒ＋）灰Ａ、　１３．　ＣＫ、
１ｆｉｌ　１ｉＹ　＜’）　’＜４’ｃ粉炭セｋ・１．
（ｉＩ！′−灰にて）、υ序発生防止のために実施され
ている加湿＋ａ、　、ＩＩ＋！　（ｃ　（１）　ｔｒｌ
Ｉ合０−白昆水ｂ”＝：　４０　％　）を施した。Ratio 11;:<Bit), ~3 p l KfW, QJr+) Ash A, 13. C.K.
1fil 1iY <') '<4'c pulverized coal sek・1.
(iI!'-Ash), Humidification +a carried out to prevent the occurrence of υ order, ,II+! (c (1) trl
40%) was applied.

Ｊｉ、水ｔＡ　ｌｌ、てＡの」１．〜合を比較例Ｊ、儲
す＃灰Ｂの場合を比１１父例２−健＋Ａ旧ノ（Ｃのｉｊ
Ｉ＋６を比較イη１３とＬ、埋立効率を求めると表３の
ψｌ〈であった。なお・がｔ、ｄｕ１日〔り然焼灰投入
前の海水のｐｒ４は８２〜８３であった。1. Comparative example J, the case of profit #ash B is compared with 11 father example 2 - Ken + A old
Comparing I+6, η13 and L, the landfill efficiency was found to be ψl in Table 3. It should be noted that the pr4 of the seawater before adding the burnt ash was 82 to 83 for 1 day.

（以下余白） 表３より一流動床燃焼灰のうち集塵機捕集灰にｊＪＩＩ
　ｎ（ｌ！造粒処理を施［７た後に炭酸カス含イ］雰囲
気中にＣ養生することによつｒ、埋立効率が著しく向１
ユするとともに滑油河水のｐＨを排水基ｆ１１における
規制的内に抑制させることができることがわかる。(Left below) From Table 3, among the fluidized bed combustion ash, the ash collected by the dust collector is jJII.
By curing C in the atmosphere, the landfill efficiency is significantly improved.
It can be seen that the pH of the oil river water can be suppressed within the regulatory range at the drainage base f11.

以上説明したように、未発明によれは石炭を燃ν］とす
る流動床燃焼の際に発生する流動床燃焼灰の７１１］水
域への埋立処分または投棄処分の際に埋立効率を著しく
向上させることができるとともに浸がｉ海水のｐＩ−Ｉ
を排水基準における規制値内の９０以灰 １ぐとすることが可能であり、木発す１は流動床燃焼７
の埋立処分または投棄処分を円滑に実施し、国土の活用
に寄与する技術としてきわめてイ〕益である。As explained above, the invention significantly improves the landfill efficiency when the fluidized bed combustion ash generated during the fluidized bed combustion of coal is landfilled or dumped into a body of water. can be immersed in seawater pI-I
It is possible to make the ash 90 or higher within the regulated value in the wastewater standards, and the wood emitted 1 is the fluidized bed combustion 7
It is extremely beneficial as a technology that facilitates the smooth implementation of landfill or dumping of waste and contributes to the utilization of national land.

Claims (1)

【特許請求の範囲】[Claims] １　燃料としての石炭および脱硫剤としての石灰石から
構成される流動床における流動床燃焼の１祭に発生する
石炭灰および脱イ流済脱硫剤からなる流動床燃焼灰のう
ち、集塵機捕集灰であるダーイクロン灰および／−また
は電気集塵灰を簡”水域に埋立処分捷たに枚葉処分　−
八−するμ？ｌミに、？昆水届２０〜７０％となるよう
７１」ノ水ま／ζに：ｉ淡水をびｉｃ　１ｌＤＩ床燃焼
灰に添加しつつ、粒径が２〜３　Ｑ　’ｈｒＴｒ７どな
るよう造粒処即ケ施し、ついでＡ；Ｊ　ｌ’ｆｔｒカス
舎伺雰囲気中にで０１〜２４時聞責生した後、埋立処分
捷たは枚葉処分することを特徴とする５炭焚がＬ動床ボ
イラ発生灰の処］↓１１方法。1 Among the fluidized bed combustion ash consisting of coal ash and desulfurizing agent that have been removed and removed during the first stage of fluidized bed combustion in a fluidized bed consisting of coal as a fuel and limestone as a desulfurizing agent, ash collected by a dust collector is Disposal of dichlorne ash and/or electrostatic precipitated ash in a landfill in a water area, or single-leaf disposal.
Eight-to-μ? To lmi? While adding fresh water to the 11DI bed combustion ash, immediately apply it to the granulation process so that the particle size is 2 to 3 Q'hrTr7. Next, A: The 5-charcoal firing system is characterized by the fact that the ash produced by the L moving bed boiler is disposed of in a landfill or in sheets after being exposed to the atmosphere from 01 to 24 hours. ]↓11 methods.