JPS6114100B2 - - Google Patents
Info
- Publication number
- JPS6114100B2 JPS6114100B2 JP12777181A JP12777181A JPS6114100B2 JP S6114100 B2 JPS6114100 B2 JP S6114100B2 JP 12777181 A JP12777181 A JP 12777181A JP 12777181 A JP12777181 A JP 12777181A JP S6114100 B2 JPS6114100 B2 JP S6114100B2
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- granules
- incineration ash
- sewage sludge
- sludge 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.)
- Expired
Links
- 239000007788 liquid Substances 0.000 claims description 24
- 239000010801 sewage sludge Substances 0.000 claims description 14
- 239000010815 organic waste Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 description 23
- 239000002699 waste material Substances 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 239000000047 product Substances 0.000 description 12
- 235000019441 ethanol Nutrition 0.000 description 11
- 238000010304 firing Methods 0.000 description 10
- 230000005484 gravity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000010865 sewage Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011398 Portland cement Substances 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
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood 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
Description
本発明は下水汚泥焼却灰を用いた軽量骨材の製
造方法に関する。
下水処理場から大量に発生する下水汚泥焼却灰
は、現在その一部がコンポストとして有効利用さ
れているが、大部分は海岸や陸上で埋立処分され
ている。
しかしこの処理方法も立地上の制限があつて埋
立処分は次第に困難になりつゝある。このため、
下水汚泥焼却灰の有効利用法の開発が強く望まれ
ている。
本発明者等はこの要望に応じるために下水汚泥
焼却灰を造粒後焼成して軽量で強度の大なる骨材
を造らんとして種々研究を行つた。
その結果によると、下水汚泥焼却灰に有機質廃
液を添加して造粒すると有機質廃液中の固形分が
特定範囲のとき含水量が少なく、強度の大なる造
粒物が得られること、および斯くして得られた造
粒物を焼成すれば比較的低い焼成温度で比重の小
さく強度の大なる焼結粒状物が得られることを知
見した。
次に実験した結果について説明する。
実験に使用した焼却灰の組成は重量％で表わし
て第１表の如きものであり、また使用した有機廃
液であるアルコール廃液の物性は第２表の如きも
のである。
The present invention relates to a method for producing lightweight aggregate using sewage sludge incineration ash. Currently, some of the sewage sludge incineration ash generated in large quantities from sewage treatment plants is effectively used as compost, but the majority is disposed of in landfills on the coast or on land. However, this treatment method is also subject to location limitations, and landfill disposal is becoming increasingly difficult. For this reason,
There is a strong desire to develop a method for effectively utilizing sewage sludge incineration ash. In order to meet this demand, the inventors of the present invention conducted various studies in an attempt to produce a lightweight and strong aggregate by granulating and burning sewage sludge incineration ash. According to the results, when organic waste liquid is added to sewage sludge incineration ash and granulated, granules with low water content and high strength can be obtained when the solid content of the organic waste liquid is within a certain range. It has been found that by firing the granules obtained in this manner, sintered granules with low specific gravity and high strength can be obtained at a relatively low firing temperature. Next, the experimental results will be explained. The composition of the incineration ash used in the experiment is as shown in Table 1, expressed in weight percent, and the physical properties of the alcohol waste liquid, which is an organic waste liquid, used are as shown in Table 2.
【表】【table】
【表】
焼却灰にアルコール廃液を種々の割合に添加し
て造粒し、造粒物の含水率および圧潰強度とアル
コール廃液添加量との関係を求め、第１図の結果
を得た。ここに圧潰強度とは造粒物の強度測定法
の一種で測定した強度であつて、一粒の造粒物を
板上に置き、その試料の上に板をのせ、その上か
ら加重をかけてどの程度の加重で破壊するかを試
験する方法である。
第１図において、１は圧潰強度とアルコール廃
液添加量との関係を、２は水分含有量とアルコー
ル廃液添加量との関係を示す。次に第２図におい
て１，２および３はそれぞれ得られる焼成物の比
重が1.0、1.2および1.4の場合を示す。
以上は有機質廃液としてアルコール廃液を使用
した場合であるが、パルプ廃液、例えば第３表に
示すような性状のSP法による蒸解廃液[Table] Alcohol waste liquid was added to incineration ash in various proportions and granulated, and the relationship between the moisture content and crushing strength of the granules and the amount of alcohol waste liquid added was obtained, and the results shown in Figure 1 were obtained. Here, the crushing strength is the strength measured by a type of strength measurement method of granules, and is obtained by placing one granule on a plate, placing the plate on top of the sample, and applying a load from above. This is a method of testing how much load can be applied to break the material. In FIG. 1, 1 shows the relationship between the crushing strength and the amount of alcohol waste liquid added, and 2 shows the relationship between the water content and the amount of alcohol waste liquid added. Next, in FIG. 2, 1, 2 and 3 indicate the cases where the specific gravity of the obtained fired product is 1.0, 1.2 and 1.4, respectively. The above is a case where alcohol waste liquid is used as organic waste liquid, but pulp waste liquid, for example cooking waste liquid produced by SP method with properties as shown in Table 3, is used.
【表】
を使用した場合でも同じような結果が得られた。
第１図および第２図から下水汚泥焼却灰に対し
有機質廃液を、その乾燥固形分が４〜12重量％に
なるように添加し、造粒すれば含水率が少なく、
圧潰強度の大なる造粒物が得られ、この造粒物を
焼成すれば、強度の大なる焼結粒状物が得られる
ことが認められる。
次に上記方法で造つた焼結粒状物、市販の人工
軽量骨材および川砂にポルトランドセメントを混
合し、モルタル試験を行つた結果を第４表に示
す。Similar results were obtained using [Table]. Figures 1 and 2 show that if organic waste liquid is added to the sewage sludge incineration ash so that the dry solid content is 4 to 12% by weight and granulated, the moisture content is low.
It is recognized that granules with high crushing strength are obtained, and by firing these granules, sintered granules with high strength can be obtained. Next, Portland cement was mixed with the sintered granules produced by the above method, a commercially available artificial lightweight aggregate, and river sand, and a mortar test was conducted. The results are shown in Table 4.
【表】
本発明はこれらの知見に基くものであつて、下
水汚泥焼却灰に対して有機質廃液を、その乾燥固
形物が４〜12重量％になるように添加し、含水率
を調整して造粒した後、1000℃〜1200℃で焼成し
て軽量骨材を得ることを特徴とする下水汚泥焼却
灰を用いた軽量骨材の製造方法である。
本発明において、下水から汚泥を凝集し、沈澱
させて脱水せしめる工程で消石灰を添加する場合
は汚泥中に酸化カルシウムの含有量が多くなり、
造粒物を高温で、焼成する際融着し易くなるた
め、汚泥中の酸化カルシウム量は15％以下のもの
を使用することが望ましい。
造粒物の焼成温度は焼成物の比重、有機質廃液
の添加割合、炉内雰囲気、焼成時間により異なる
が、1000℃〜1200℃の間である。
本発明において下水汚泥焼却灰に対する有機質
廃液の添加量は乾燥固形分換算で４〜12％が好ま
しく、４重量％以下の場合ではバインダーとして
の効果が弱くなり、造粒物の強度が十分でなく、
また12重量％以上では焼成物の比重が大になり、
かつ所望の比重のものを得ようとすれば、比較的
高い温度で焼成する必要がある。
本明細書において有機質廃液とは、エチルアル
コール製造の際に副生するアルコール廃液、木材
をSP法によつて蒸解する際に副生するパルプ廃
液を意味している。
本発明においては、通常の皿型造粒機などを用
いて焼却灰と有機質廃液との混合物を造粒し、直
径0.5〜15mm程度の大きさの造粒物を造る。
そして造粒物の水分が20〜25％になるように含
水率を調整して造粒することが望ましい。またこ
の造粒物を焼成するには、ロータリーキルンなど
を使用して行なうことも出来るが、本発明では有
機質をバインダーとして使用しているため、加熱
過程で造粒物の粉化が起り易く、また下水汚泥焼
却灰は融着し易い組成で構成されているため、特
開昭57−1436号公報および特開昭57−28982号公
報記載の記流焼成方法および炉を用いれば造粒物
を投入初期に急速に加熱することができるので、
造粒物の表面は直ちに焼結せしめられ、粉化が少
なく、造粒物相互は、融着することなく、比重の
軽い焼成物を造ることができる。
本発明によれば、造粒物の含水量が少なく、強
度の大きな造粒物が得られるので、乾燥の際、熱
量を低減せしめることができるばかりでなく、造
粒物の粉化、破壊を防止することができる。また
比較的低い焼成温度で比重が小さく、強度の大き
な焼成物を造ることができるので、市販の人工軽
量骨材と同等或はそれ以上の品質のものが得ら
れ、その工業的価値は大である。
実施例
下水処理場から排出する下水汚泥の焼却灰（そ
の組成は第１表と同じ）を200メツシユ通過90％
に粉砕し、その焼却灰粉砕物100重量部に対し、
第２表に示すアルコール廃液を20重量部添加混合
しさらに水を20重量部添加して含水量を調整し、
皿型造粒機により0.3〜3.5mmの造粒物を作つた後
乾燥した。次にこの造粒物を特開昭57−1436号公
報に記載の堅型炉による気流焼成法により最高温
度1050℃で焼成した。
このようにして得た焼成物の粒度を調整した結
果、第４表に示すような比重の軽い高強度の人工
軽量骨材が得られた。またこの焼成物を用いてモ
ルタル強度を測定したところ川砂を骨材とした場
合と同等の強度を示した。
なおこの実施例において造粒の際に第３表に示
す如きパルプ廃液を用いても上記と同様の結果が
得られた。[Table] The present invention is based on these findings, and involves adding organic waste liquid to sewage sludge incineration ash so that the dry solid content thereof is 4 to 12% by weight, and adjusting the water content. This is a method for producing lightweight aggregate using sewage sludge incineration ash, which is characterized by granulating and then firing at 1000°C to 1200°C to obtain lightweight aggregate. In the present invention, when slaked lime is added in the process of coagulating sludge from sewage, settling it, and dewatering it, the content of calcium oxide in the sludge increases;
It is desirable to use a sludge with a calcium oxide content of 15% or less because it tends to fuse when the granules are fired at high temperatures. The firing temperature of the granules varies depending on the specific gravity of the fired product, the addition ratio of organic waste liquid, the atmosphere in the furnace, and the firing time, but is between 1000°C and 1200°C. In the present invention, the amount of organic waste liquid added to the sewage sludge incineration ash is preferably 4 to 12% in terms of dry solid content, and if it is less than 4% by weight, the effect as a binder will be weakened and the strength of the granulated product will be insufficient. ,
In addition, if it exceeds 12% by weight, the specific gravity of the fired product will increase,
In addition, in order to obtain a product with a desired specific gravity, it is necessary to sinter at a relatively high temperature. In this specification, organic waste liquid refers to alcohol waste liquid that is produced as a by-product during the production of ethyl alcohol, and pulp waste liquid that is produced as a by-product when wood is digested by the SP method. In the present invention, a mixture of incineration ash and organic waste liquid is granulated using a common dish-type granulator to form granules having a diameter of about 0.5 to 15 mm. It is desirable to adjust the moisture content so that the moisture content of the granulated product is 20 to 25%. Additionally, the granules can be fired using a rotary kiln, but since organic matter is used as a binder in the present invention, the granules are likely to become powder during the heating process. Sewage sludge incineration ash has a composition that easily fuses, so if you use the rotary firing method and furnace described in JP-A-57-1436 and JP-A-57-28982, you can add granules. Because it can be heated quickly in the initial stage,
The surface of the granules is immediately sintered, there is little pulverization, and the granules do not fuse together, making it possible to produce a fired product with a light specific gravity. According to the present invention, since granules with low water content and high strength can be obtained, not only can the amount of heat be reduced during drying, but also the pulverization and destruction of the granules can be prevented. It can be prevented. Furthermore, since it is possible to produce a fired product with low specific gravity and high strength at a relatively low firing temperature, it is possible to obtain a product with quality that is equivalent to or better than commercially available artificial lightweight aggregate, and its industrial value is great. be. Example: 200 meshes of incinerated ash from sewage sludge discharged from a sewage treatment plant (its composition is the same as in Table 1) pass through 90%.
For 100 parts by weight of the crushed incineration ash,
Add and mix 20 parts by weight of the alcohol waste liquid shown in Table 2, and further add 20 parts by weight of water to adjust the water content.
Granules with a size of 0.3 to 3.5 mm were made using a dish-type granulator and then dried. Next, this granulated product was fired at a maximum temperature of 1050°C by the air flow firing method using a vertical furnace described in Japanese Patent Application Laid-Open No. 1436/1983. As a result of adjusting the particle size of the fired product thus obtained, a high-strength artificial lightweight aggregate with a light specific gravity as shown in Table 4 was obtained. Furthermore, when the mortar strength was measured using this fired product, it showed the same strength as when river sand was used as aggregate. In this example, the same results as above were obtained even when pulp waste liquids as shown in Table 3 were used during granulation.
【表】【table】
第１図および第２図は本発明の実験結果を示す
ものであつて、第１図は下水汚泥焼却灰の造粒物
におけるアルコール廃液の添加量と造粒物の圧潰
強度並びに造粒物の水分含量との関係を示すグラ
フであり、また第２図はアルコール廃液添加量と
焼成温度の関係を示すグラフである。
Figures 1 and 2 show the experimental results of the present invention, and Figure 1 shows the amount of alcohol waste added to the sewage sludge incineration ash granules, the crushing strength of the granules, and the results of the experiments. FIG. 2 is a graph showing the relationship between water content and FIG. 2 is a graph showing the relationship between the amount of alcohol waste liquid added and the firing temperature.
Claims (1)
の乾燥固形分が４〜12重量％になるように添加
し、含水率を調整して造粒した後、1000℃〜1200
℃で焼成した軽量骨材を得ることを特徴とする下
水汚泥焼却灰を用いた軽量骨材の製造方法。1 Organic waste liquid is added to the sewage sludge incineration ash so that the dry solid content is 4 to 12% by weight, the moisture content is adjusted and granulated, and the mixture is heated at 1000℃ to 1200℃.
A method for producing lightweight aggregate using sewage sludge incineration ash, characterized by obtaining lightweight aggregate calcined at °C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56127771A JPS5830381A (en) | 1981-08-17 | 1981-08-17 | Treatment for incineration ash of sewage sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56127771A JPS5830381A (en) | 1981-08-17 | 1981-08-17 | Treatment for incineration ash of sewage sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5830381A JPS5830381A (en) | 1983-02-22 |
| JPS6114100B2 true JPS6114100B2 (en) | 1986-04-17 |
Family
ID=14968282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56127771A Granted JPS5830381A (en) | 1981-08-17 | 1981-08-17 | Treatment for incineration ash of sewage sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830381A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0195368U (en) * | 1987-12-16 | 1989-06-23 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60210552A (en) * | 1984-04-04 | 1985-10-23 | 日本碍子株式会社 | Manufacture of lightweight aggregate from sludge |
| JP5401852B2 (en) * | 2008-07-03 | 2014-01-29 | 王子ホールディングス株式会社 | Ash processing method |
-
1981
- 1981-08-17 JP JP56127771A patent/JPS5830381A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0195368U (en) * | 1987-12-16 | 1989-06-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5830381A (en) | 1983-02-22 |
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