JP2616223B2 - Incineration method for water absorbent material - Google Patents
Incineration method for water absorbent materialInfo
- Publication number
- JP2616223B2 JP2616223B2 JP2306621A JP30662190A JP2616223B2 JP 2616223 B2 JP2616223 B2 JP 2616223B2 JP 2306621 A JP2306621 A JP 2306621A JP 30662190 A JP30662190 A JP 30662190A JP 2616223 B2 JP2616223 B2 JP 2616223B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing material
- incineration
- fluidized bed
- sludge
- 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 - Lifetime
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
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
- Disintegrating Or Milling (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は吸水材の焼却処理方法に係り、特に、使い捨
て紙おむつ等に代表される高分子吸水材等の吸水材の焼
却処理において、取扱い時の臭気発生を押えて、良好な
作業環境のもとに、容易かつ効率的な処理を行なうこと
ができ、同時に、汚泥の焼却処理も行える吸水材の焼却
処理方法に関する。The present invention relates to a method for incinerating a water-absorbing material, and particularly to a method for incinerating a water-absorbing material such as a polymeric water-absorbing material represented by a disposable paper diaper. The present invention relates to a method of incinerating a water-absorbing material, which can easily and efficiently perform a treatment under a favorable working environment while suppressing generation of odor.
［従来の技術］ 近年、高分子吸水材を用いた使い捨て紙おむつは、そ
の吸水材性能向上、大量生産による低価格化及び生活様
式の変化等により、増々需要が高まりつつある。また、
人工分布の高齢化によっても、その需要は更に増加する
傾向にある。このため、廃棄された使い捨て紙おむつの
処理が、重要な課題となる。[Related Art] In recent years, the demand for disposable disposable diapers using a polymer water-absorbing material has been increasing due to the improvement of the water-absorbing material performance, the cost reduction by mass production, the change of lifestyle, and the like. Also,
With the aging of the artificial distribution, the demand tends to further increase. For this reason, disposal of disposable disposable diapers is an important issue.
現在、使い捨て紙おむつ等の高分子吸水材を利用した
廃棄物は、一般の家庭・都市ゴミと共に大型の都市ゴミ
焼却炉で焼却処理されている。或いは、そのまま、埋立
て廃棄処分されている。Currently, wastes using polymeric water-absorbing materials such as disposable disposable diapers are incinerated with large household garbage incinerators together with general household and municipal garbage. Alternatively, it has been landfilled as it is.
［発明が解決しようとする課題］ しかしながら、使用済みの高分子吸水材は自重の数十
〜数百倍の水分を吸水しており、しかも形状がくずれに
くく大きな“かたまり”として処分されることとなる。
このように重くて大きな物を多量に燃焼・焼却するとな
ると、焼却炉内で特別な撹拌操作や多くの滞留時間が必
要となり、一般の焼却炉では焼却処理が非常に困難とな
る。[Problems to be Solved by the Invention] However, the used polymer water-absorbing material absorbs water of several tens to several hundreds times its own weight, and its shape is not easily deformed and is disposed of as a large “lump”. Become.
When such heavy and large objects are burned and incinerated in large quantities, a special stirring operation and a long residence time are required in the incinerator, and the incineration process becomes very difficult in a general incinerator.
また、特に、使用済み紙おむつの場合には、その臭気
による作業環境の悪化の問題もある。In particular, in the case of used paper diapers, there is a problem that the working environment is deteriorated due to the odor.
本発明は上記従来の問題点を解決し、高分子吸水材等
の吸水材を、臭気の発生を押えて、容易かつ効率的に焼
却処理する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 easily and efficiently incinerating a water-absorbing material such as a polymer water-absorbing material while suppressing generation of odor.
［課題を解決するための手段］ 請求項（１）の吸水材の焼却処理方法は、吸収した高
分子吸水材等の吸水材を焼却処理する方法において、該
吸水材を冷凍、固化させた後、粉砕し、得られた粉砕物
を汚泥と混合した後焼却することを特徴とする。[Means for Solving the Problems] The method for incinerating a water-absorbing material according to claim (1) is a method for incinerating a water-absorbing material such as an absorbed polymer water-absorbing material, wherein the water-absorbing material is frozen and solidified. Pulverized, and the resulting pulverized material is mixed with sludge and then incinerated.
請求項（２）の吸水材の焼却処理方法は、請求項
（１）の方法において、焼却処理時に回収される蒸気を
冷凍手段の動力源の少なくとも一部として使用すること
を特徴とする。According to a second aspect of the present invention, there is provided a method for incinerating a water-absorbing material according to the first aspect, wherein the steam recovered during the incineration is used as at least a part of a power source of the refrigeration unit.
請求項（３）の吸水材の焼却処理方法は、請求項
（１）又は（２）の方法において、焼却を、炉内に焼却
用流動床と熱回収用流動床とが上下２段に設けられた流
動床式焼却炉で行うことを特徴とする。The method for incinerating a water-absorbing material according to claim (3) is the method according to claim (1) or (2), wherein the incinerator is provided with a fluidized bed for incineration and a fluidized bed for heat recovery in a furnace in two stages. In a fluidized bed incinerator.
なお、請求項（１）の方法に従って、汚泥を混合する
場合、その混合比は、処理対象系統によっても異なる
が、通常の場合、吸水材の冷凍、固化、粉砕物：汚泥＝
100:10〜50（重量比）とするのが好ましい。In addition, when the sludge is mixed according to the method of claim (1), the mixing ratio varies depending on the system to be treated, but usually, the frozen, solidified, pulverized water absorbing material: sludge =
The ratio is preferably set to 100: 10 to 50 (weight ratio).
［作用］ 水分を多量に吸水した高分子吸水材等の吸水材はその
ままでは非常に解砕し難いが、冷却して凍結固化させる
ことにより容易に機械解砕等により微粉砕することがで
きる。そして、微粉砕したものであれば、後段の焼却炉
等による燃焼・焼却工程において、融解・乾燥・燃焼を
短時間で容易に行なうことができる。なお、冷凍、固化
された吸水材は機械解砕等による粉砕工程で殆どが溶融
状態に戻るため、冷凍状態が燃焼に対して障害になるこ
とはない。[Action] Although a water-absorbing material such as a polymer water-absorbing material that has absorbed a large amount of water is very difficult to disintegrate as it is, it can be easily pulverized by mechanical disintegration or the like by cooling and freeze-solidification. And, if it is finely pulverized, melting, drying and combustion can be easily performed in a short time in a combustion / incineration step using a subsequent incinerator or the like. Most of the frozen and solidified water-absorbing material returns to a molten state in a pulverizing step such as mechanical disintegration, so that the frozen state does not hinder combustion.
特に、本発明の方法では、被焼却物を粉砕するため、
高温燃焼が可能で、燃焼効率の良い流動床式焼却炉を用
いることができ極めて有利である。In particular, in the method of the present invention, in order to crush the incinerated material,
High temperature combustion is possible and a fluidized bed incinerator with good combustion efficiency can be used, which is extremely advantageous.
しかも、冷凍、固化して低温で前処理するため、臭気
等のガス発生も防止され、良好な作業環境のもとに、無
公害処理を行なうことが可能とされる。In addition, since the pretreatment is performed at a low temperature after freezing and solidification, generation of gas such as odor is also prevented, and pollution-free treatment can be performed under a favorable working environment.
その上、本発明では、冷凍、固化粉砕物を汚泥と混合
した後焼却するため、汚泥処理を同時に行なうことがで
きる。即ち、従来より、排水及び下水余剰汚泥等の汚泥
の燃焼・焼却処理についても、その改良が望まれている
が、本発明の方法においては、冷凍、固化後、粉砕して
得られる吸水材は、混合された汚泥の水分を更に吸水す
るため、汚泥の水分調整が行なえる上に、汚泥の発熱料
調整をも行なえることになり、吸水材及び汚泥共に、そ
の燃焼処理が非常に容易となる。In addition, according to the present invention, since the frozen and solidified pulverized material is mixed with the sludge and then incinerated, the sludge treatment can be performed simultaneously. That is, conventionally, the improvement of the combustion and incineration treatment of sludge such as wastewater and sewage excess sludge has been desired, but in the method of the present invention, the water-absorbing material obtained by crushing after freezing, solidifying, and In order to further absorb the water content of the mixed sludge, the water content of the sludge can be adjusted, and also the heating value of the sludge can be adjusted. Become.
なお、本発明において、吸水した吸水材の粉砕物が、
汚泥の水分を更に吸水する理由は次の通りである。In the present invention, the pulverized material of the water-absorbing material that has absorbed water,
The reason for further absorbing the water content of the sludge is as follows.
即ち、冷凍、固化された吸水材は機械解砕等による粉
砕家庭で粉砕熱を受けると共に、微粉砕により比表面積
が増大して大気の温度が有効に作用することにより、冷
凍固化状態から融解されつつその吸水材の水分も適宜蒸
発され、吸水能力が部分的に回復される。或いは、紙お
むつ等の吸水材はその全面が吸水しているとは限らず、
依然として吸水能力を保った部分も存在する。従って、
このように吸水能力を回復した部分、或いは、吸水能力
が残留する部分の微粉粒子の存在により、該微粉砕され
た吸水材と汚泥とを混合すると、該吸水材は汚泥の水分
を吸収して、汚泥の水分調整等を行う。In other words, the frozen and solidified water-absorbing material receives crushing heat in the crushing home by mechanical crushing and the like, and is also melted from the frozen and solidified state by the specific surface area being increased by fine crushing and the temperature of the atmosphere effectively acting. At the same time, the water content of the water absorbing material is appropriately evaporated, and the water absorbing ability is partially restored. Alternatively, water absorbing materials such as disposable diapers do not always absorb water over the entire surface.
There are still parts that retain their water absorption capacity. Therefore,
As described above, when the finely pulverized water-absorbing material and the sludge are mixed due to the presence of the fine particles in the portion where the water-absorbing ability has been recovered or the portion where the water-absorbing ability remains, the water-absorbing material absorbs the water of the sludge. , And adjust the water content of the sludge.
しかして、請求項（２）の方法に従って、焼却処理時
に回収される蒸気を冷凍手段の動力源の少なくとも一部
として使用することにより、エネルギーの有効利用を図
ることができる。According to the method of claim (2), by using the steam recovered during the incineration as at least a part of the power source of the refrigeration means, it is possible to effectively use energy.
請求項（３）の方法に従って、吸収材及び汚泥の焼却
を焼却用流動床と熱回収用流動床とが上下２段に設けら
れた流動床式焼却炉で行うことにより焼却効率及び熱回
収効率の向上等の効果が奏される。即ち、焼却用流動床
では焼却のみを行い、熱回収をしないことにより、流動
床の温度低下を防いで溶融・乾燥・燃焼を短時間で容易
に行うことができ、しかも高温燃焼が可能で、燃焼効率
が良く、臭気発生の問題も解消される。また、汚泥も吸
水材により水分を吸収されているため燃焼・焼却工程で
乾燥・焼却を短時間で容易に行うことができる。そし
て、熱回収用流動床では該焼却用流動床での燃焼、焼却
により発生する燃焼ガスの排熱を効率的に回収してエネ
ルギーを有効に利用するようにすることができる。According to the method of claim (3), incineration of the absorbent and sludge is performed in a fluidized bed incinerator in which a fluidized bed for incineration and a fluidized bed for heat recovery are provided in two upper and lower stages, thereby increasing the incineration efficiency and heat recovery efficiency. The effect such as improvement of is exhibited. That is, in the incineration fluidized bed, only incineration is performed and no heat recovery is performed, so that the temperature of the fluidized bed can be prevented from lowering, melting / drying / combustion can be easily performed in a short time, and high-temperature combustion is possible. It has good combustion efficiency and eliminates the problem of odor generation. Further, since the sludge also absorbs moisture by the water absorbing material, drying and incineration can be easily performed in a short time in the combustion and incineration process. In the fluidized bed for heat recovery, the exhaust heat of the combustion gas generated by combustion and incineration in the fluidized bed for incineration can be efficiently recovered, and the energy can be used effectively.
特に、請求項（３）の方法において、請求項（２）の
態様を採用する場合には、熱回収用流動床において、焼
却用流動床で燃焼、焼却により発生する燃焼ガスの排熱
を蒸気として回収して冷凍手段の動力源の一部とするの
で、焼却用流動床で温度低下を生じることなく安定かつ
効率的に燃焼焼却を行えると共に、熱回収用流動床で燃
焼エネルギーを効率的に回収してエネルギーの有効利用
を図ることができ、熱効率の良い吸収材及び汚泥の焼却
処理を行うことができる。In particular, in the method of claim (3), when the aspect of claim (2) is adopted, the exhaust heat of the combustion gas generated by combustion and incineration in the fluidized bed for incineration is converted into steam in the fluidized bed for heat recovery. As a part of the power source of the refrigeration means, combustion and incineration can be performed stably and efficiently without lowering the temperature in the incineration fluidized bed, and the combustion energy can be efficiently used in the heat recovery fluidized bed. The energy can be recovered and energy can be effectively used, and the absorbent and sludge can be incinerated with good thermal efficiency.
［実施例］ 以下に図面を参照して本発明の実施例について説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の実施例に係る吸水材の焼却処理方法
を説明する系統図である。FIG. 1 is a system diagram illustrating a method of incinerating a water-absorbing material according to an embodiment of the present invention.
高分子吸水材はコンベヤ１にて冷凍室２に導入され、
冷凍される。この冷凍室２には冷凍コイル３が配設さ
れ、冷凍機４から冷媒が供給される。冷凍室２で冷凍さ
れた高分子吸収材は機械式粉砕機５に投入され、粉砕さ
れる。粉砕された高分子吸水材はコンベヤ６でホッパ７
に投入され、ここに供給される汚泥と共に混合されて一
旦貯蔵される。ホッパ７の底部から取り出された高分子
吸収材の粉砕物と汚泥の混合物は、供給機８で流動床式
焼却炉９に供給される。流動床式焼却炉９は分散板10,1
1が２段に設けられ、上下２段に流動床12,13が形成され
ている。下段側の流動床12は焼却用の流動床であり、分
散板12を通って空気と補助燃料（例えば重油等の液体燃
料やガス）が供給され、適宜の流動媒体の流動床が形成
される。この流動床中において補助燃料と共に高分子吸
水材が燃焼する。9aは燃焼空気用のブロワである。The polymer water-absorbing material is introduced into the freezer 2 by the conveyor 1,
Be frozen. A freezing coil 3 is provided in the freezing room 2, and a refrigerant is supplied from the freezer 4. The polymer absorbent frozen in the freezer 2 is put into the mechanical crusher 5 and crushed. The crushed polymer water-absorbing material is conveyed by a conveyor 6 to a hopper 7
And mixed with the sludge supplied here and stored once. A mixture of pulverized polymer absorbent and sludge taken out from the bottom of the hopper 7 is supplied to a fluidized bed incinerator 9 by a feeder 8. The fluidized bed incinerator 9 is composed of dispersion plates 10,1
1 is provided in two stages, and fluidized beds 12, 13 are formed in two upper and lower stages. The lower fluidized bed 12 is a fluidized bed for incineration, and air and auxiliary fuel (for example, liquid fuel such as heavy oil or gas) are supplied through the dispersion plate 12 to form a fluidized bed of an appropriate fluidized medium. . The polymer water-absorbing material burns together with the auxiliary fuel in the fluidized bed. 9a is a blower for combustion air.
燃焼ガスは上段側の分散板11を通って熱回収用の流動
床13に入る。この流動床13に埋設するように伝熱管14が
配設されており、燃焼熱はこの伝熱管14と、排ガス煙道
20の伝熱管15とで回収される。伝熱管14で生じたスチー
ムは気水分離ドラム16を経て伝熱管15で過熱された後、
蒸気タービン17に送られる。タービン17は前記冷凍機４
を駆動する。タービン17を出たスチームは復水器18で復
水された後、復水ポンプ19を経てドラム16に戻される。
なお、煙道20を出たガスは排ガス処理装置（図示略）に
て集塵処理や必要に応じ脱硫、脱硝、脱臭等の処理が行
なわれた後、大気放出される。The combustion gas enters the fluidized bed 13 for heat recovery through the upper-side dispersion plate 11. A heat transfer tube 14 is disposed so as to be buried in the fluidized bed 13, and the combustion heat is transferred to the heat transfer tube 14 and the flue gas flue.
Collected with 20 heat transfer tubes 15. After the steam generated in the heat transfer tube 14 is heated by the heat transfer tube 15 through the steam separator 16,
The steam is sent to the steam turbine 17. The turbine 17 is the refrigerator 4
Drive. After leaving the turbine 17, the steam is condensed by a condenser 18 and then returned to a drum 16 via a condensate pump 19.
The gas that has left the flue 20 is discharged to the atmosphere after being subjected to dust collection processing and, if necessary, desulfurization, denitration, deodorization, etc., by an exhaust gas treatment device (not shown).
第１図に示す方法によれば、吸水材及び汚泥を良好な
エネルギー効率のもとに、容易かつ効率的に焼却処理す
ることが可能とされる。According to the method shown in FIG. 1, it is possible to easily and efficiently incinerate a water-absorbing material and sludge with good energy efficiency.
なお、第１図に示す方法は本発明の一実施例であっ
て、本発明はその要旨を超えない限り、図示の方法に何
ら限定されるものではない。It should be noted that the method shown in FIG. 1 is an embodiment of the present invention, and the present invention is not limited to the illustrated method unless it exceeds the gist.
［発明の効果］ 以上詳述した通り、本発明の吸水材の焼却処理方法に
よれば、使い捨て紙おむつ等に代表される高分子吸水材
等の吸水材を、取扱い時の臭気発生を押えて、良好な作
業環境のもとに、容易かつ効率的に焼却処理することが
可能とされる。しかも、汚泥の水分調整及び発熱量調整
を行なうこともでき、汚泥の処理効率の向上を図ること
もできる。[Effects of the Invention] As described above in detail, according to the method for incinerating a water-absorbing material of the present invention, a water-absorbing material such as a polymer water-absorbing material represented by a disposable disposable diaper or the like can suppress odor generation during handling, The incineration can be easily and efficiently performed under a favorable working environment. In addition, the water content and the calorific value of the sludge can be adjusted, and the sludge treatment efficiency can be improved.
特に、請求項（２）の方法によれば、エネルギーの有
効利用が図れ、経済的である。In particular, according to the method of claim (2), energy can be effectively used, and the method is economical.
また、請求項（３）の方法によれば、焼却効率及び熱
回収効率が極めて良好となる。According to the method of claim (3), the incineration efficiency and the heat recovery efficiency are extremely good.
第１図は本発明の吸水材の焼却処理方法の一実施方法を
示す系統図である。 1,6……コンベヤ、２……冷凍室、 ３……冷凍コイル、４……冷凍機、 ５……粉砕機、７……ホッパ、 ８……供給機、９……流動床式焼却炉、12,13……流動
床、14,15……伝熱管、17……蒸気タービン。FIG. 1 is a system diagram showing an embodiment of a method for incinerating a water-absorbing material according to the present invention. 1,6 ... Conveyor, 2 ... Freezer, 3 ... Refrigerator coil, 4 ... Refrigerator, 5 ... Pulverizer, 7 ... Hopper, 8 ... Feeder, 9 ... Fluidized bed incinerator , 12, 13 ... fluidized bed, 14, 15 ... heat transfer tube, 17 ... steam turbine.
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｇ 7/00 １０２ Ｂ０９Ｂ 5/00 Ｍ Continued on the front page (51) Int.Cl. 6 Identification number Agency reference number FI Technical indication F23G 7/00 102 B09B 5/00 M
Claims (3)
て、該吸水材を冷凍固化させた後、粉砕し、得られた粉
砕物を汚泥と混合した後焼却することを特徴とする吸水
材の焼却処理方法。1. A method for incinerating a water-absorbing material that has absorbed water, wherein the water-absorbing material is frozen and solidified, then crushed, and the obtained crushed material is mixed with sludge and then incinerated. Incineration method.
動力源の少なくとも一部として使用することを特徴とす
る請求項（１）に記載の吸水材の焼却処理方法。2. The method for incinerating a water-absorbing material according to claim 1, wherein the steam recovered during the incineration is used as at least a part of a power source of the refrigeration means.
動床とが上下２段に設けられた流動床式焼却炉で行うこ
とを特徴とする請求項（１）又は（２）に記載の吸水材
の焼却処理方法。3. The incinerator according to claim 1, wherein the incineration is performed in a fluidized bed incinerator in which a fluidized bed for incineration and a fluidized bed for heat recovery are provided in two upper and lower stages. ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2306621A JP2616223B2 (en) | 1990-11-13 | 1990-11-13 | Incineration method for water absorbent material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2306621A JP2616223B2 (en) | 1990-11-13 | 1990-11-13 | Incineration method for water absorbent material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04177014A JPH04177014A (en) | 1992-06-24 |
| JP2616223B2 true JP2616223B2 (en) | 1997-06-04 |
Family
ID=17959292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2306621A Expired - Lifetime JP2616223B2 (en) | 1990-11-13 | 1990-11-13 | Incineration method for water absorbent material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616223B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7312624B2 (en) * | 2019-06-28 | 2023-07-21 | 花王株式会社 | Method for separating and recovering constituent material of absorbent article |
| JP7270497B2 (en) * | 2019-07-30 | 2023-05-10 | 花王株式会社 | How to collect recycled resources |
| JP7084065B1 (en) * | 2021-04-27 | 2022-06-14 | 株式会社サムズ | How to dispose of used disposable diapers |
| JP7198540B2 (en) * | 2021-04-27 | 2023-01-04 | 株式会社サムズ | How to dispose of used disposable diapers |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5286257A (en) * | 1976-01-12 | 1977-07-18 | Mitsubishi Electric Corp | Organic sludge treating method |
| JPS53110265A (en) * | 1977-03-05 | 1978-09-26 | Ebara Infilco Co Ltd | Burning of wastes |
-
1990
- 1990-11-13 JP JP2306621A patent/JP2616223B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04177014A (en) | 1992-06-24 |
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