JPH07315971A - Production of calcium silicate fertilizer - Google Patents
Production of calcium silicate fertilizerInfo
- Publication number
- JPH07315971A JPH07315971A JP10951094A JP10951094A JPH07315971A JP H07315971 A JPH07315971 A JP H07315971A JP 10951094 A JP10951094 A JP 10951094A JP 10951094 A JP10951094 A JP 10951094A JP H07315971 A JPH07315971 A JP H07315971A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- concrete
- slurry
- waste water
- water
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
- C05F7/005—Waste water from industrial processing material neither of agricultural nor of animal origin
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Fertilizers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は珪酸石灰肥料の製造方法
に係り、特に、従来、再利用又は処理に腐心している生
コンスラッジを、珪酸分を多く必要とする植物、特にイ
ネ科植物にとって有効な珪酸石灰肥料の原料として再利
用する珪酸石灰肥料の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a silicate lime fertilizer, and is particularly effective for plants that require a large amount of silicic acid, particularly raw grass sludge that has been reusable for reuse or treatment. The present invention relates to a method for producing a silicate lime fertilizer to be reused as a raw material for a simple silicate lime fertilizer.
【０００２】[0002]
【従来の技術】コンクリートプラントからは、骨材置場
からの廃水、ベルトコンベアなどの洗浄廃水など、骨材
に付着している粘土やシルトの微粒分を含む廃水や、コ
ンクリートミキサやホッパ、またはトラックアジテータ
などの洗浄廃水、湿式集じん機からの廃水などのよう
に、セメントの可溶成分を含んでいるために高いアルカ
リ性を示す廃水が大量に排出される。また、廃生コンク
リートや工場に戻される残りコンクリート等から骨材を
分離回収することによっても大量の洗浄廃水が発生す
る。コンクリートプラントから排出される廃水は高アル
カリ性で、浮遊物質（ＳＳ）を含んでいることから、そ
のまま工場外へ排出することはできず、プラント内で処
理された後、再利用又は排出されている。2. Description of the Related Art From a concrete plant, wastewater from aggregate storage, cleaning wastewater such as belt conveyors, etc., containing fine particles of clay or silt adhering to aggregates, concrete mixers, hoppers, or trucks. A large amount of waste water having high alkalinity is discharged because it contains soluble components of cement, such as washing waste water such as agitator and waste water from wet dust collector. Also, a large amount of washing wastewater is generated by separating and collecting aggregate from waste concrete or residual concrete returned to the factory. The wastewater discharged from the concrete plant cannot be discharged outside the factory as it is because it is highly alkaline and contains suspended solids (SS). It is reused or discharged after being processed in the plant. .
【０００３】一般には、これらの廃水は分離槽でスラッ
ジ（汚泥）と上澄水とに沈降分離し、資源の有効利用を
図るために、分離された上澄水とスラッジの一部を濃度
調整して混合し、スラッジスラリーを調製してコンクリ
ートの練り混ぜ水として循環再利用している。また、上
澄水の残部は散水、洗浄に使用されたり、中和後系外へ
排出される。In general, these wastewaters are settled and separated into sludge (sludge) and supernatant water in a separation tank, and the concentration of the separated supernatant water and a part of the sludge is adjusted for effective use of resources. The sludge slurry is mixed and prepared and recycled as mixing water for concrete. The rest of the supernatant water is used for sprinkling and washing, or is discharged after neutralization.
【０００４】ところで、コンクリートの練り混ぜ水とし
て循環再使用した残りのスラッジスラリーは、そのまま
では産業廃棄物として処分できないため、従来、機械式
脱水機等で脱水ケーキに変えて、埋め立て処分されてい
る(Gypsum & Lime No.234(1991)P.122〜131 吉兼 亮
「生コン排水及び生コンスラッジの再利用」）。前記廃
水の沈降分離で得られたスラッジの残部についても同様
に脱水ケーキとして処理されている。By the way, the remaining sludge slurry, which has been circulatively reused as water for mixing concrete, cannot be disposed of as industrial waste as it is. Therefore, it is conventionally disposed of in a landfill instead of a dehydrated cake by a mechanical dehydrator or the like. (Gypsum & Lime No. 234 (1991) P.122-131 Ryo Yoshikane "Reuse of raw concrete wastewater and reuse of raw sludge"). The remaining sludge obtained by the sedimentation separation of the wastewater is also treated as a dehydrated cake.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、近年、
都市化の進行に伴い、脱水ケーキを埋め立て処分するた
めの処理用地の確保が困難になりつつある上に、埋め立
て処理すること自体、資源の有効活用の面からは不利で
ある等の問題がある。However, in recent years,
With the progress of urbanization, it is becoming more difficult to secure a processing site for the landfill disposal of dehydrated cakes, and the landfill processing itself is disadvantageous in terms of effective use of resources. .
【０００６】本発明は上記従来の問題点を解決し、生コ
ンスラッジスラリー又は脱水ケーキを有効再利用する珪
酸石灰肥料の製造方法を提供することを目的とする。An object of the present invention is to solve the above-mentioned conventional problems and to provide a method for producing a silicate lime fertilizer which effectively reuses a raw condensate slurry or a dehydrated cake.
【０００７】[0007]
【課題を解決するための手段】本発明の珪酸石灰肥料の
製造方法は、生コンスラッジスラリーを、スプレードラ
イヤーで乾燥造粒して顆粒状ないし球状のスラッジ造粒
物とすることを特徴とする。The method for producing a silicate lime fertilizer according to the present invention is characterized in that a raw conus sludge slurry is dried and granulated by a spray dryer to obtain a granular or spherical sludge granulated product.
【０００８】以下に本発明を詳細に説明する。The present invention will be described in detail below.
【０００９】本発明において、珪酸石灰肥料の製造出発
原料として用いる生コンスラッジスラリーとは、トラッ
クアジテータの洗浄廃水、或いは、生コンクリート工場
で発生する廃生コンクリート、生コンクリート工場に戻
される残りコンクリート等から骨材を分離回収する際に
発生する洗浄廃水のようなコンクリートプラントからの
排出廃水から、コンクリートの練り混ぜ水として循環再
使用されたスラッジスラリーの残部などを指す。In the present invention, the raw conus sludge slurry used as a starting material for the production of silicate lime fertilizer is a waste water for cleaning a truck agitator, a waste raw concrete generated in a raw concrete factory, a residual concrete returned to a raw concrete factory, or the like. It refers to the rest of the sludge slurry that is circulated and reused as the mixing water of concrete from the waste water discharged from the concrete plant, such as the cleaning waste water generated when the aggregate is separated and collected.
【００１０】また、上記コンクリートプラントからの排
出廃水から得られたスラッジ、又は、上記生コンスラッ
ジスラリーから得られたスラッジを、フィルタープレス
等の脱水機で脱水して、或いは、自然天日乾燥等で乾燥
して得られる生コンスラッジ脱水ケーキ等に、水（この
水はコンクリートプラント、その他の廃水であっても良
い。）を添加してミキサー等で均一に混合撹拌して得ら
れるスラッジスラリーを出発原料としても良い。The sludge obtained from the waste water discharged from the concrete plant or the sludge obtained from the raw con sludge slurry is dehydrated by a dehydrator such as a filter press or by natural sun drying. The raw material is sludge slurry obtained by adding water (this water may be concrete plant or other waste water) to a dried raw sludge dewatering cake etc. obtained by drying and mixing and stirring with a mixer etc. Also good.
【００１１】上記出発原料のうち、生コンスラッジスラ
リーは、主に、生コンクリート工場において本発明によ
り珪酸石灰肥料を製造する場合に用いられ、一方、生コ
ンスラッジ脱水ケーキに水を加えてスラッジスラリーと
したものは、生コンクリート工場以外の肥料製造施設で
珪酸石灰肥料を製造する場合に用いられ、この場合には
生コンスラッジ脱水ケーキの形態で生コンクリート工場
から出荷される。Of the above-mentioned starting materials, the green raw sludge slurry is mainly used for producing a silicate lime fertilizer according to the present invention in a green concrete factory, while water is added to a green raw sludge dehydrated cake to make a sludge slurry. The thing is used when manufacturing a silicate lime fertilizer in a fertilizer manufacturing facility other than a fresh concrete factory, and in this case, it is shipped from a fresh concrete factory in the form of a fresh conus sludge dewatering cake.
【００１２】本発明においては、このようなスラッジス
ラリーをスプレードライヤーで乾燥造粒して、好ましく
は平均粒径５０〜１００μｍの顆粒状ないし球状のスラ
ッジ造粒物を得る。In the present invention, such a sludge slurry is dried and granulated by a spray dryer to obtain a granular or spherical sludge granulated product preferably having an average particle size of 50 to 100 μm.
【００１３】これにより、生コンスラッジに含まれる珪
酸や石灰等を有効成分とし、取り扱い性も良好な珪酸石
灰肥料が得られる。As a result, it is possible to obtain a silicate lime fertilizer containing silicic acid, lime, etc. contained in the raw conus sludge as an active ingredient and having good handleability.
【００１４】なお、本発明において、スプレードライヤ
ーによる乾燥造粒効率の面から、乾燥造粒に供するスラ
ッジスラリーは、固形物含有量２０〜７０重量％程度で
あることが好ましい。In the present invention, the sludge slurry used for dry granulation preferably has a solid content of about 20 to 70% by weight in view of the efficiency of dry granulation by a spray dryer.
【００１５】[0015]
【作用】生コンスラッジには、珪酸石灰肥料として有効
な珪酸や石灰をはじめ、多種類の鉱物微粉が多く含まれ
ているが、これらが、スプレードライヤーでの乾燥及び
造粒の過程で凝集し、更に、スラッジ中に含まれる未水
和セメントの水和反応が促進され硬化することにより、
施用時の発塵や運搬時の崩壊が発生し難く、取り扱い性
に優れた珪酸石灰肥料が得られる。[Function] Raw conus sludge contains many kinds of mineral fine powders such as silicic acid and lime which are effective as silicate lime fertilizers, and these are aggregated in the process of drying and granulation with a spray dryer, Furthermore, the hydration reaction of unhydrated cement contained in the sludge is accelerated and hardened,
A silicate-lime fertilizer with excellent handleability is obtained, which does not easily generate dust during application or collapse during transportation.
【００１６】[0016]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明する。EXAMPLES The present invention will be described in more detail with reference to the following examples.
【００１７】実施例１ 生コンクリート工場のコンクリート練り混ぜ水としての
スラッジスラリーの余剰スラリー（固形分含有率４０重
量％）を、ディスク並流型スプレードライヤーにて下記
条件にて乾燥造粒し、平均粒径８７μｍの顆粒状のスラ
ッジ造粒物Ｉを得た。Example 1 An excess slurry of sludge slurry (solid content 40% by weight) as water for mixing concrete in a ready-mixed concrete plant was dried and granulated under the following conditions with a disk co-current spray dryer, and averaged. A granular sludge granulation product I having a particle size of 87 μm was obtained.
【００１８】乾燥造粒条件 ドライヤー入口温度：２００℃ ドライヤー出口温度：１１０℃ アトマイザー回転数：１４，８００ｒｐｍ 製品粒度分布 ：５０〜１３０μｍ 別に、生コンクリート工場のスラッジ脱水ケーキ（含水
率５０重量％）に水を加えてミキサーで均一に撹拌混合
して得られた固形分含有量３６重量％のスラッジスラリ
ーについても、上記と同様にして乾燥造粒して平均粒径
９３μｍのスラッジ造粒物IIを得た。 Drying and granulating conditions Dryer inlet temperature: 200 ° C. Dryer outlet temperature: 110 ° C. Atomizer rotation speed: 14,800 rpm Product particle size distribution: 50 to 130 μm Separately, in a sludge dewatering cake (water content 50% by weight) of a ready-mixed concrete factory The sludge slurry having a solid content of 36% by weight obtained by uniformly stirring and mixing with water with a mixer was also dried and granulated in the same manner as above to obtain a sludge granule II having an average particle diameter of 93 μm. It was
【００１９】得られたスラッジ造粒物Ｉ，IIについて含
有成分を分析し、結果を表１に示した。なお、表１に
は、従来品である各種鉱滓を原料とする珪酸石灰肥料に
ついての含有成分の分析結果も併記した。The components contained in the obtained sludge granules I and II were analyzed, and the results are shown in Table 1. In addition, Table 1 also shows the analysis results of the components contained in the conventional silicate lime fertilizer using various slags as raw materials.
【００２０】表１より、本発明による珪酸石灰肥料は、
従来品である各種鉱滓を原料とする珪酸石灰肥料の組成
とほぼ同等であり、相応の機能を有していることが明ら
かである。From Table 1, the silicate lime fertilizer according to the present invention is
It is clear that the composition is almost the same as that of conventional lime-lime fertilizers made from various slags, and that it has a corresponding function.
【００２１】[0021]
【表１】 [Table 1]
【００２２】また、得られたスラッジ造粒物Ｉの珪酸石
灰肥料及び高炉鉱滓からの珪酸石灰肥料を水稲に、各
々、１アール当り２０ｋｇ施用したときの成績を、未施
用区と比較して表２に示す。Further, the results of applying 20 kg per are of the silicate lime fertilizer of the obtained sludge granules I and the silicate lime fertilizer from the blast furnace slag to the paddy rice are shown in comparison with the unapplied section. 2 shows.
【００２３】表２より、本発明による珪酸石灰肥料の施
用区は、未施用区よりも米収量が多く、また従来品であ
る高炉鉱滓からの珪酸石灰肥料の施用区とほぼ同等の成
績を示すことが分かる。As shown in Table 2, the applied area of the silicate lime fertilizer according to the present invention has a higher rice yield than the unapplied area, and shows almost the same results as the applied area of the conventional silicate lime fertilizer from the blast furnace slag. I understand.
【００２４】[0024]
【表２】 [Table 2]
【００２５】[0025]
【発明の効果】以上詳述した通り、本発明の珪酸石灰肥
料の製造方法によれば、従来より処理又は再利用に腐心
している生コンスラッジを有効資源として活用して、肥
効及び取り扱い性に優れる珪酸石灰肥料を製造すること
ができる。本発明は、廃棄物減量、資源の有効活用の面
で工業的に極めて有用である。As described above in detail, according to the method for producing a silicate lime fertilizer of the present invention, the raw conus sludge, which has been hard to treat or reuse, is utilized as an effective resource to improve fertilization and handleability. An excellent lime silicate fertilizer can be produced. INDUSTRIAL APPLICABILITY The present invention is industrially extremely useful in terms of waste reduction and effective use of resources.
Claims (1)
ライヤーで乾燥造粒して顆粒状ないし球状のスラッジ造
粒物とすることを特徴とする珪酸石灰肥料の製造方法。1. A method for producing a silicate lime fertilizer, which comprises dry granulating a raw conus sludge slurry with a spray dryer to obtain a granular or spherical sludge granule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10951094A JPH07315971A (en) | 1994-05-24 | 1994-05-24 | Production of calcium silicate fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10951094A JPH07315971A (en) | 1994-05-24 | 1994-05-24 | Production of calcium silicate fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07315971A true JPH07315971A (en) | 1995-12-05 |
Family
ID=14512100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10951094A Withdrawn JPH07315971A (en) | 1994-05-24 | 1994-05-24 | Production of calcium silicate fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07315971A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000066681A1 (en) * | 1999-05-03 | 2000-11-09 | Thorpe, Beryl, Ann | Soil conditioning agent and method of manufacture of a soil conditioning agent |
| JP2002254099A (en) * | 2001-03-01 | 2002-09-10 | Yoshiaki Sato | Recovering method of fine powder of concrete sludge, device therefor and fine powder of concrete sludge |
| AU756459B2 (en) * | 1999-05-03 | 2003-01-16 | Thorpe, Beryl Ann | Soil conditioning agent and method of manufacture of a soil conditioning agent |
| KR100383074B1 (en) * | 2000-11-01 | 2003-05-12 | 김명환 | Production method for coarse calcareous manure using waste lime |
-
1994
- 1994-05-24 JP JP10951094A patent/JPH07315971A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000066681A1 (en) * | 1999-05-03 | 2000-11-09 | Thorpe, Beryl, Ann | Soil conditioning agent and method of manufacture of a soil conditioning agent |
| AU756459B2 (en) * | 1999-05-03 | 2003-01-16 | Thorpe, Beryl Ann | Soil conditioning agent and method of manufacture of a soil conditioning agent |
| KR100383074B1 (en) * | 2000-11-01 | 2003-05-12 | 김명환 | Production method for coarse calcareous manure using waste lime |
| JP2002254099A (en) * | 2001-03-01 | 2002-09-10 | Yoshiaki Sato | Recovering method of fine powder of concrete sludge, device therefor and fine powder of concrete sludge |
| JP4698043B2 (en) * | 2001-03-01 | 2011-06-08 | 嘉昭 佐藤 | Concrete sludge fine powder recovery method and apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010731 |