JPS61271098A - Incinerating method for waste water sludge - Google Patents
Incinerating method for waste water sludgeInfo
- Publication number
- JPS61271098A JPS61271098A JP60113850A JP11385085A JPS61271098A JP S61271098 A JPS61271098 A JP S61271098A JP 60113850 A JP60113850 A JP 60113850A JP 11385085 A JP11385085 A JP 11385085A JP S61271098 A JPS61271098 A JP S61271098A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- incineration
- compd
- fluidized bed
- corrosion
- 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
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は排水汚泥の焼却処理方法に係り、特にリンを多
く含む汚泥の焼却処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for incinerating wastewater sludge, and particularly to a method for incinerating sludge containing a large amount of phosphorus.
（従来の技術）
食品工場などで発生する排水スラッジには、リンが高濃
度で含有される場合がある。なお、一般の下水汚泥など
でもリンは含まれているものの、ごく微量であるため問
題とはならない。(Prior Art) Wastewater sludge generated in food factories and the like may contain a high concentration of phosphorus. Although phosphorus is contained in general sewage sludge, the amount is so small that it does not pose a problem.
リンを燃焼させると、無水リン酸をはじめ、種々の酸化
物を生成する。これらの酸化物の特徴としては、高温域
においてガラスになることが知られている。このため、
リンを高濃度で含有する汚泥を焼却した場合、天分とこ
のガラス状物質とが一体となって、焼却炉および後流の
集じん装置において、タリンカートラブルを生じる。こ
のタリンカートラブルは、特に、サイクロンなどの集じ
ん装置において生じることが多い。また焼却炉として流
動層炉を用いる場合において、流動媒体として珪砂を使
用するとケイ酸ガラスを生成し、流動層の固着現象を生
じる。When phosphorus is burned, various oxides are produced, including phosphoric anhydride. It is known that these oxides turn into glass at high temperatures. For this reason,
When sludge containing a high concentration of phosphorus is incinerated, the sludge and this glassy material combine to cause sludge trouble in the incinerator and downstream dust collector. This dust collector trouble often occurs particularly in dust collectors such as cyclones. Further, when a fluidized bed furnace is used as an incinerator, if silica sand is used as a fluidized medium, silicate glass is generated, causing a phenomenon of fixation of the fluidized bed.
さらに、無水リン酸は非常に反応性の強い物質で、高温
域においては高温腐食を生じ、また低温域ではリン酸（
Ｈ３ＰＯ４）となって金属を腐食させるという問題もあ
る。Furthermore, phosphoric anhydride is a highly reactive substance, causing high-temperature corrosion at high temperatures, and phosphoric acid (
There is also the problem that it becomes H3PO4) and corrodes metals.
汚泥の焼却処理には、従来からロータリーキルン炉、多
段炉、流動層炉を用いられているが、近年は流動層炉を
用いる場合が増えており、この場合、一般的に省エネル
ギーを計るために、空気予熱器を設けることが多い。し
かし、上記のような高温腐食がある場合には、このよう
な空気予熱器の設置が困難となる。多段炉においても同
様に乾燥段における腐食およびクリンカーの問題を生じ
る。またロータリーキルン炉でも同様であり、いずれの
炉形式においても、上記の問題の解決が強く望まれてい
る。Traditionally, rotary kiln furnaces, multi-stage furnaces, and fluidized bed furnaces have been used to incinerate sludge, but in recent years fluidized bed furnaces have been increasingly used.In this case, generally in order to save energy, An air preheater is often provided. However, if there is high-temperature corrosion as described above, it becomes difficult to install such an air preheater. Multi-stage furnaces also suffer from corrosion and clinker problems in the drying stage. The same applies to rotary kiln furnaces, and in any furnace type, there is a strong desire to solve the above problems.
（発明が解決しようとする問題点）
本発明の目的は、リン化合物によるクリンカートラブル
、高温腐食および低温腐食を軽減し、汚泥あ安定した連
続焼却処理を行うことのできる焼却方法を提供すること
にある。(Problems to be Solved by the Invention) An object of the present invention is to provide an incineration method that can reduce clinker trouble caused by phosphorus compounds, high-temperature corrosion, and low-temperature corrosion, and perform stable continuous incineration of sludge. be.
（問題点を解決するための手段）
要するに、本発明は、リンを含む汚泥にカルシウム化合
物を混合した後、焼却処理を行うようにしたものである
。本発明は、特に流動層炉において流動媒体として石灰
石を用いて排水汚泥を焼却する場合に効果的である。(Means for Solving the Problems) In short, the present invention is such that after a calcium compound is mixed into sludge containing phosphorus, the sludge is incinerated. The present invention is particularly effective when wastewater sludge is incinerated using limestone as a fluidized medium in a fluidized bed furnace.
（実施例）
本発明による排水処理方法の実施例を第１図に示す。本
実施例は流動層炉を用いた場合である。(Example) An example of the wastewater treatment method according to the present invention is shown in FIG. This example is a case where a fluidized bed furnace is used.
排水汚泥１は、一旦汚泥供給ホツバ２に貯留された後、
コンベヤ６により一定量が混線機８に供給される。また
カルシウム化合物として炭酸カルシウム３（以下、Ｃａ
ＣＯ３と記す）は、一時ＣａｃＯ３ホッパ４に貯留され
た後、圧縮空気５により一定量が混線機８に供給され、
ここで前記排水汚泥ｌと混練される。混練ｗＡ８で均一
に混練された混合物は、流動層炉９に供給され、焼却処
理される。焼却排ガスはサイクロン１１でダストを除去
された後、空気予熱器１２で熱回収が行われた後、ガス
処理装置１３に導入され、ここで清浄なガスとなった後
、誘引ファン１５、煙突１６を介して大気に放出される
。ダストは、サイクロン１１、空気予熱器１２）ガス処
理装置１３からそれぞれ抜き出され、灰コンベヤ１７上
に捕集され、次いで灰バンカ１８に回収され、系外に搬
出される。After the wastewater sludge 1 is once stored in the sludge supply tank 2,
A certain amount is supplied to the crosstalk machine 8 by the conveyor 6. In addition, as a calcium compound, calcium carbonate 3 (hereinafter referred to as Ca
After being temporarily stored in the CacO3 hopper 4, a certain amount of CO3 is supplied to the crosstalk machine 8 using compressed air 5.
Here, it is mixed with the wastewater sludge 1. The mixture uniformly kneaded in kneading wA8 is supplied to a fluidized bed furnace 9 and is incinerated. After dust is removed from the incineration exhaust gas by a cyclone 11, heat is recovered by an air preheater 12, and then the gas is introduced into a gas treatment device 13, where it becomes clean gas, and then passed through an induction fan 15 and a chimney 16. released into the atmosphere via Dust is extracted from the cyclone 11, air preheater 12) and gas treatment device 13, collected on the ash conveyor 17, then collected in the ash bunker 18, and transported out of the system.
本発明は、安価なカルシウム化合物を汚泥に混合して焼
却し、焼却時に発生する種々のリン酸化物をカルシウム
化合物と反応させることにより、安定なリン酸カルシウ
ムとして除去しようとするものである。代表例として、
無水リン酸と、炭酸カルシ、ラムの反応式を下に示す。The present invention attempts to remove an inexpensive calcium compound as stable calcium phosphate by mixing it with sludge and incinerating it, and reacting various phosphoric oxides generated during incineration with the calcium compound. As a representative example,
The reaction formula of phosphoric anhydride, calci carbonate, and rum is shown below.
４ Ｐ ＋ ５０２ ２ Ｐ２０ｓ・・・・・・
（１）ＣａＣＯＣａＯ＋ＣＯ・・” （２）
Ｐ２０５ ＋３ＣａＯ−−→Ｃａ３ （ＰＯ４）２
”” （３）上記実施例によれば、汚泥にカルシウム化
合物を添加し、流動層焼却炉で焼却することにより、リ
ン酸化物は、カルシウム化合物と反応して非常に安定な
リン酸カルシウム（（：ａ３ （ＰＯ４）２）となる
ので、高温条件でガラスを生成することはなく、前記の
ようなクリンカートラブルを防ぐことができる。また高
温腐食を軽減でき、実施例に示すように空気予熱器の設
置が可能となる。また低温腐食域での材料も、一般社で
も良くなり、安定した連続運転も可能となる。4 P + 502 2 P20s・・・・・・
(1) CaCOCaO+CO・・” (2) P205 +3CaO−−→Ca3 (PO4)2
(3) According to the above example, by adding a calcium compound to the sludge and incinerating it in a fluidized bed incinerator, the phosphorous oxide reacts with the calcium compound to form extremely stable calcium phosphate ((:a3 (PO4)2) Therefore, glass will not be generated under high temperature conditions, and the clinker troubles mentioned above can be prevented. Also, high temperature corrosion can be reduced, and as shown in the example, an air preheater can be installed. In addition, the materials used in the low-temperature corrosion range can be used by general manufacturers, and stable continuous operation is also possible.
さらに、付随的な効果としては、まず、カルシウム酸化
物は、含有されるリンとの理論反応量の数倍添加するた
め、汚泥焼却によって発生する硫黄酸化物および塩化水
素等の酸性ガスを、カルシウムとの反応により除去する
ことができる。つまり、リンの除去と同時に酸性排ガス
も除去できる。Furthermore, as an additional effect, first of all, since calcium oxide is added several times the theoretical amount of reaction with the contained phosphorus, acidic gases such as sulfur oxides and hydrogen chloride generated by sludge incineration are It can be removed by reaction with In other words, acidic exhaust gas can be removed at the same time as phosphorus is removed.
さらに、また焼却炉として流動層炉を用いる場合、流動
媒体として、石灰石を用いると、流動層の固着が防止で
きると同時に、前述と同様の効果が期待できる。Furthermore, when a fluidized bed furnace is used as the incinerator, if limestone is used as the fluidized medium, it is possible to prevent the fluidized bed from sticking and at the same time, the same effects as described above can be expected.
特に食品工場等の排水汚泥を焼却する場合には、焼却灰
中にリン酸カルシウムが多量に生成されているため、焼
却灰を肥料として利用することも可能となり、従って灰
の処理費が不要で、ランニングコストの軽減が図ること
ができる。In particular, when wastewater sludge from food factories, etc. is incinerated, a large amount of calcium phosphate is produced in the incinerated ash, making it possible to use the incinerated ash as fertilizer. Cost reduction can be achieved.
（発明の効果）
本発明によれば、焼却炉およびサイクロン等におけるク
リンカートラブルおよび腐食を防止し、安定した連続運
転が可能となる。このため、空気予熱器等のエネルギー
回収設備の設置が可能となり、省エネルギー化を図るこ
とができ、さらに、同時に酸性排ガスも除去できるため
、税硫等の設備を設ける必要がなく、設備、のコンパク
ト化が容易になる。(Effects of the Invention) According to the present invention, clinker trouble and corrosion in incinerators, cyclones, etc. can be prevented, and stable continuous operation can be performed. This makes it possible to install energy recovery equipment such as an air preheater, resulting in energy savings.Furthermore, since acidic exhaust gas can also be removed at the same time, there is no need to install equipment such as sulfur removal, making the equipment more compact. It becomes easier to
第１図は、本発明による排水汚泥の焼却処理方法の実施
例を示すシステムフローの図である。
１・・・排水汚泥、２・・・汚泥供給ホッパ、３・・・
炭酸カルシウム、４・・・ホッパ、５・・・圧縮空気、
６・・・供給コンベヤ、７・・・分離ホッパ、８・・・
混練機、９・・・流動層炉、１０・・・二次空気ファン
、１１・・・サイクロン、１２・・・空気予熱器、１３
・・・ガス処理装置、１７・・・灰コンベヤ、１８・・
・灰バンカ。FIG. 1 is a system flow diagram showing an embodiment of the wastewater sludge incineration treatment method according to the present invention. 1... Drainage sludge, 2... Sludge supply hopper, 3...
Calcium carbonate, 4... hopper, 5... compressed air,
6... Supply conveyor, 7... Separation hopper, 8...
Kneader, 9... Fluidized bed furnace, 10... Secondary air fan, 11... Cyclone, 12... Air preheater, 13
...Gas processing equipment, 17...Ash conveyor, 18...
・Ai Banka.
Claims (2)
却処理前に、汚泥とカルシウム化合物を混合することを
特徴とする排水汚泥の焼却処理方法。(1) A method for incinerating wastewater sludge containing phosphorus, which comprises mixing sludge and a calcium compound before incineration.
動層炉、流動媒体として石灰石を使用することを特徴と
する排水汚泥の焼却処理方法。(2) A method for incinerating wastewater sludge according to claim (1), characterized in that a fluidized bed furnace is used as the incinerator and limestone is used as the fluidized medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60113850A JPS61271098A (en) | 1985-05-27 | 1985-05-27 | Incinerating method for waste water sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60113850A JPS61271098A (en) | 1985-05-27 | 1985-05-27 | Incinerating method for waste water sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61271098A true JPS61271098A (en) | 1986-12-01 |
Family
ID=14622628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60113850A Pending JPS61271098A (en) | 1985-05-27 | 1985-05-27 | Incinerating method for waste water sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61271098A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04104A (en) * | 1990-04-16 | 1992-01-06 | Kubota Corp | Method of preventing splashing of phosphorus in melting furnace |
| JP2003320397A (en) * | 2002-04-30 | 2003-11-11 | Chugai Ro Co Ltd | Incineration treatment method for sewage sludge |
| JP2020003193A (en) * | 2018-06-29 | 2020-01-09 | 月島機械株式会社 | Incineration processing method for sewage sludge by fluidized-bed incinerator and incineration processing facility |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133670A (en) * | 1974-04-09 | 1975-10-23 | ||
| JPS51120175A (en) * | 1975-04-14 | 1976-10-21 | Hitachi Ltd | Method of checking wire bonding |
| JPS55150415A (en) * | 1979-05-10 | 1980-11-22 | Ishikawajima Harima Heavy Ind Co Ltd | Method of effectivley utilizing sludge melting slag |
| JPS562899A (en) * | 1979-06-22 | 1981-01-13 | Ebara Infilco Co Ltd | Treatment of sludge containing organism substance |
| JPS5843644A (en) * | 1981-08-31 | 1983-03-14 | インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン | Code system for tdma communication |
| JPS5945948A (en) * | 1982-09-06 | 1984-03-15 | 三菱重工業株式会社 | Use of waste fluidized medium from fluidized bed boiler |
| JPS61283340A (en) * | 1985-06-06 | 1986-12-13 | Electric Power Dev Co Ltd | Preparation of desulfurization agent for fluidized bed apparatus |
-
1985
- 1985-05-27 JP JP60113850A patent/JPS61271098A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133670A (en) * | 1974-04-09 | 1975-10-23 | ||
| JPS51120175A (en) * | 1975-04-14 | 1976-10-21 | Hitachi Ltd | Method of checking wire bonding |
| JPS55150415A (en) * | 1979-05-10 | 1980-11-22 | Ishikawajima Harima Heavy Ind Co Ltd | Method of effectivley utilizing sludge melting slag |
| JPS562899A (en) * | 1979-06-22 | 1981-01-13 | Ebara Infilco Co Ltd | Treatment of sludge containing organism substance |
| JPS5843644A (en) * | 1981-08-31 | 1983-03-14 | インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン | Code system for tdma communication |
| JPS5945948A (en) * | 1982-09-06 | 1984-03-15 | 三菱重工業株式会社 | Use of waste fluidized medium from fluidized bed boiler |
| JPS61283340A (en) * | 1985-06-06 | 1986-12-13 | Electric Power Dev Co Ltd | Preparation of desulfurization agent for fluidized bed apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04104A (en) * | 1990-04-16 | 1992-01-06 | Kubota Corp | Method of preventing splashing of phosphorus in melting furnace |
| JP2003320397A (en) * | 2002-04-30 | 2003-11-11 | Chugai Ro Co Ltd | Incineration treatment method for sewage sludge |
| JP2020003193A (en) * | 2018-06-29 | 2020-01-09 | 月島機械株式会社 | Incineration processing method for sewage sludge by fluidized-bed incinerator and incineration processing facility |
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