WO2011018977A1 - Organic sludge drying system and drying method - Google Patents

Organic sludge drying system and drying method Download PDF

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Publication number
WO2011018977A1
WO2011018977A1 PCT/JP2010/063256 JP2010063256W WO2011018977A1 WO 2011018977 A1 WO2011018977 A1 WO 2011018977A1 JP 2010063256 W JP2010063256 W JP 2010063256W WO 2011018977 A1 WO2011018977 A1 WO 2011018977A1
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Prior art keywords
organic sludge
drying
water
drying treatment
organic
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PCT/JP2010/063256
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French (fr)
Japanese (ja)
Inventor
聰一郎 岡村
哲雄 大桐
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太平洋セメント株式会社
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Publication of WO2011018977A1 publication Critical patent/WO2011018977A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01005—Mixing water to ash
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
    • 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
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the present invention relates to a system and method for drying and treating organic sludge using a waste incinerator.
  • Patent Document 1 the organic sludge is dried using the extraction gas from the clinker cooler in the cement manufacturing process as a heat source, the dried organic sludge is burned with a kiln burner or the like, and the exhaust gas generated in the drying process is It describes that it is deodorized by introducing it at a temperature of 700 ° C. or higher in the cement manufacturing process.
  • Patent Document 2 a dehydrated cake is mixed on the surface of dried sludge produced in advance, and the dried exhaust gas after drying the mixed sludge is attracted by a drying fan, and a part of the attracted dried exhaust gas (1 Secondary dry exhaust gas) is mixed with high-temperature air through the first duct and used to dry the mixed sludge, and the remainder of the dry exhaust gas (secondary dry exhaust gas) is introduced into the combustion furnace through the second duct for deodorization, etc.
  • Secondary dry exhaust gas 1 Secondary dry exhaust gas
  • secondary dry exhaust gas is introduced into the combustion furnace through the second duct for deodorization, etc.
  • organic sludge retains about 80% of the water as biological water inside the cell wall, and the amount of heat for removing this water and the amount of heat obtained when used as fuel after drying are almost in competition. Yes.
  • a method of using waste heat discharged from a cement manufacturing plant or using paid plastic waste as a heat source has been proposed.
  • the temperature of the preheater exhaust gas is about 450 ° C. at the maximum, and even when waste plastic is used as a heat source, corrosion by hydrochloric acid (HCL) is a serious problem when trying to burn above 400 ° C. It becomes.
  • the present invention has been made in view of the problems in the above-described conventional technology, and by increasing the evaporation efficiency of moisture contained in the organic sludge and the drying rate of the organic sludge, an organic sludge treatment facility is provided. It aims at providing the drying processing system etc. which can process a condensed water efficiently while reducing in size.
  • the present invention is an organic sludge drying treatment system, wherein a heat source for drying organic sludge is an organic sludge drying device that uses exhaust gas of 450 ° C. or less discharged from a waste incinerator, A water vapor condensing device for condensing water vapor generated by drying by the organic sludge drying device, and an incinerated ash water cold water washing device for using the water condensed by the water vapor condensing device for cooling and washing the incinerated ash.
  • a heat source for drying organic sludge is an organic sludge drying device that uses exhaust gas of 450 ° C. or less discharged from a waste incinerator
  • a water vapor condensing device for condensing water vapor generated by drying by the organic sludge drying device
  • an incinerated ash water cold water washing device for using the water condensed by the water vapor condensing device for cooling and washing the incinerated ash.
  • the water vapor is condensed and separated to eliminate the need for the combustion treatment of the water vapor, and the condensed water is used for washing the incineration ash to wash the incineration ash. Since the treatment water can be covered, it is possible to simultaneously dry the organic sludge, cool the incinerated ash, and wash with water while keeping the equipment cost and operation cost low.
  • the organic sludge drying treatment system is further provided with a decomposition substance addition device for adding a substance for degrading the protein in the organic sludge in the organic sludge drying device or in the preceding stage of the organic sludge drying device. It is possible to destroy the cell wall of cells contained in organic sludge by adding a substance that decomposes the protein in organic sludge from the decomposition substance addition device, exposing the biological water inside the cell wall Thus, the evaporation efficiency of the water can be increased, and the organic sludge can be efficiently dried.
  • the heat source can be a heat medium discharged from an incineration boiler attached to the waste incinerator.
  • the amount of processing gas after drying can be kept low, and the cost required for gas processing can be reduced.
  • the waste incinerator and the incinerated ash water cold water washing apparatus are adjacent to a cement production facility, and the incinerated ash generated from the waste incinerator is washed with the incineration ash water cold water washing apparatus.
  • the incinerated ash washed with water can be used as a cement raw material in the cement production facility.
  • the organic sludge In the organic sludge drying treatment system, the organic sludge can be indirectly heated by the exhaust gas or the heat medium. Thereby, the process of the gas after drying organic sludge becomes easy, and installation cost and operation cost can be held down further.
  • the present invention is also a method for drying organic sludge, wherein the organic sludge is dried using an exhaust gas of 450 ° C. or less discharged from a waste incinerator as a heat source, the water vapor generated by the drying is condensed, and the condensation is performed.
  • the water used is used for cooling and washing the incinerated ash.
  • the waste heat of the waste incinerator is used, the combustion process of water vapor is unnecessary, and the water for incineration ash cooling and water washing treatment is covered with condensed water,
  • the organic sludge can be dried and the incinerated ash washed with water at the same time while keeping costs and operating costs low.
  • a substance capable of degrading the protein in the organic sludge can be added before the organic sludge is dried or during the drying of the organic sludge.
  • the substance capable of degrading the protein can be any one or more of strong alkali, strong acid substance and protein degrading enzyme.
  • activated carbon can be added to the condensed water.
  • this organic acid is adsorbed on the activated carbon, preventing the organic acid from remaining in the desalted waste water after washing, and reducing odor. it can.
  • one or more of waste plastic, municipal waste, car shredder dust (ASR), and wood chips can be incinerated by the waste incinerator.
  • the dried organic sludge can be used as a cement fuel, and the incinerated ash washed with water can be used as a cement raw material.
  • the organic sludge and the incinerated ash are effectively used in a cement production process. can do.
  • the evaporation efficiency of water contained in organic sludge and the drying speed of organic sludge are increased, the processing equipment for organic sludge is miniaturized, and the drying capable of efficiently treating condensed water.
  • a processing system or the like can be provided.
  • FIG. 1 is an overall configuration diagram showing an embodiment of an organic sludge drying treatment system according to the present invention.
  • FIG. 1 shows an embodiment of an organic sludge drying treatment system (hereinafter abbreviated as “drying treatment system”) according to the present invention.
  • This drying treatment system 1 is an exhaust gas G1 from a waste incinerator 2.
  • An incineration boiler 3 that generates superheated steam ST
  • an organic sludge drying device 4 that dries organic sludge SL using superheated steam ST
  • a decomposing material addition device that adds substances that decompose protein in the organic sludge SL 7
  • steam condensing device 8 for condensing water vapor contained in gas G4 generated by drying organic sludge SL
  • incinerated ash water cold water washing device 10 for washing incineration ash A
  • desalted water L generated by water washing
  • a desalinating waste water treatment device 11 for performing waste water treatment.
  • the waste incinerator 2 is provided to incinerate waste plastic, municipal waste, car shredder dust, wood chips, etc., and is disposed adjacent to a cement manufacturing facility (not shown).
  • the temperature of the exhaust gas G1 discharged from the waste incinerator 2 is about 400 ° C. (450 ° C. or less).
  • the incineration boiler 3 is provided for evaporating water using the exhaust gas G1 to generate superheated steam ST, and in the waste incinerator 2 to generate power using waste heat of the waste incinerator 2. Often attached.
  • the organic sludge drying device 4 is provided for drying the organic sludge SL using the superheated steam ST supplied from the incineration boiler 3, and the hopper unit 4a into which the organic sludge SL is charged and the superheated steam ST are introduced. It is an external heating type (indirect heating type) drying device comprising a jacket part 4b and a discharge part 4c for discharging dried sludge D.
  • the exhaust gas treatment facility 5 is provided for detoxifying the sulfur oxide (SOx) and HCl contained in the exhaust gas G2 of the waste incinerator 2 discharged from the incineration boiler 3 and releasing it to the atmosphere. .
  • the decomposition substance addition device 7 is provided for adding a substance that decomposes the protein in the organic sludge SL in the organic sludge drying device 4.
  • a strong alkali such as sodium hydroxide (NaOH)
  • NaOH sodium hydroxide
  • a strong acid substance such as sodium hydroxide (NaOH)
  • a proteolytic enzyme that destroys cell tissues, etc. which hydrolyzes peptide bonds
  • the above substances can be added.
  • the protein degrading enzyme a protease that hydrolyzes the protein can be used. This protease includes a serine protease, which is an amino acid serine, and a carboxylate of aspartic acid.
  • the group can be roughly divided into acidic proteases in which the group (-COOH) plays an important role, thiol proteases in which the cysteine thiol group plays an important role, and metal proteases in which metal elements such as zinc and calcium play an important role it can.
  • the water vapor condensing device 8 is provided for condensing water vapor in the gas G4 generated by drying the organic sludge SL, and supplies the cooling water C to the water vapor condensing device 8 to cool and condense the water vapor.
  • the incinerated ash water cold water washing device 10 (submerged pit) is provided for washing the incinerated ash A received from municipal waste incineration facilities and the like to remove chlorine, and this water washing includes condensed water from the steam condenser 8. W is used.
  • the desalted waste water treatment device 11 is provided to drain the desalted water L discharged from the incinerated ash water cold water washing device 10 so that it can be discharged.
  • the exhaust gas G2 discharged from the waste incinerator 2 is introduced into the incineration boiler 3 to generate superheated steam ST.
  • the generated superheated steam ST is supplied to the organic sludge drying device 4 and used for drying the organic sludge SL.
  • the exhaust gas G2 discharged from the incineration boiler 3 is released to the atmosphere after harmful substances such as sulfur oxides are removed in the exhaust gas treatment facility 5.
  • the received organic sludge SL is introduced into the hopper portion 4a of the organic sludge drying device 4, while the superheated steam ST from the incineration boiler 3 is introduced into the jacket portion 4b, and the organic sludge SL is heated by the heat of the superheated steam ST of about 400 ° C. Dry.
  • the protein decomposing substance DM is introduced from the decomposing substance adding device 7, and the organic sludge SL is dried while decomposing the protein in the organic sludge SL.
  • the biological water inside a cell wall is exposed by destroying the cell wall of the cell contained in organic sludge SL, etc., the evaporation efficiency of biological water can be improved, and organic sludge SL can be dried efficiently.
  • the dried sludge D is discharged to the outside through the discharge unit 4c and can be used as fuel or the like.
  • the superheated steam ST used for drying the organic sludge SL is returned to the incineration boiler 3 and circulates between the incineration boiler 3 and the organic sludge drying device 4.
  • the gas G4 discharged from the organic sludge drying device 4 is introduced into the water vapor condensing device 8, and the water vapor contained in the gas G4 is cooled and condensed by the cooling water C.
  • Condensed condensed water W is supplied to the incineration ash water cold water washing apparatus 10 and used for water for the washing treatment of the incineration ash A.
  • the dry gas G5 discharged from the steam condenser 8 is introduced into the waste incinerator 2 to decompose odor.
  • the water vapor contained in the gas G4 is condensed by the water vapor condensing device 8 to remove the water, since the dry gas G5 does not contain water vapor, the water vapor does not need to be combusted and is discarded accordingly. A decrease in thermal efficiency in the material incinerator 2 can be suppressed.
  • the incineration ash water cold water rinsing apparatus 10 washes the incineration ash A to remove chlorine, and after rinsing, the incineration ash A is used as a cement raw material R in an adjacent cement manufacturing facility.
  • the desalted water L containing the chlorine content discharged from the incinerated ash water cold water washing apparatus 10 after the water washing is drained in the desalting drainage treatment apparatus 11 and discharged into a river or the like as the discharged water RL.
  • the odor of the organic sludge is present in any of the dried sludge D, the dried gas G5 generated after drying, the condensed water W after separation of condensed water, and the dried gas G5.
  • an organic acid is present in the condensed water W. Since the organic acid contained in the condensed water W is adsorbed by the incineration ash A, the organic acid content of the demineralized water L after the water washing treatment is considered to be low and odor is also low.
  • the organic acid can be adsorbed to the activated carbon and prevented from remaining in the demineralized water L after washing with water. it can.
  • the protein decomposing substance DM is introduced into the organic sludge drying apparatus 4 from the decomposing substance adding apparatus 7, it may be added to the organic sludge SL before the organic sludge drying apparatus 4.

Abstract

Provided is an organic sludge drying system and the like which makes it possible to reduce the size of the organic sludge treatment facility and efficiently treat condensate water by increasing the efficiency with which moisture contained in the organic sludge is evaporated and the speed at which the organic sludge is dried. An organic sludge drying system (1) is provided with: an organic sludge drying unit (4), wherein the heat source for drying organic sludge (SL) is exhaust gas (G1) at a temperature of 450ºC or less emitted from a waste incinerator (2); a steam condensation unit (8) for condensing steam generated due to the drying performed by the organic sludge drying unit (4); and an incineration ash water-cooled rinsing unit (10) which uses water (W) condensed by the steam condensation unit (8) to rinse incineration ash (A). A decomposer adding unit (7) for adding a substance to decompose proteins contained in the organic sludge (SL) is preferably further provided within or prior to the organic sludge drying unit (4).

Description

有機汚泥の乾燥処理システム及び乾燥処理方法Organic sludge drying treatment system and drying treatment method
　本発明は、廃棄物焼却炉を利用して有機汚泥を乾燥させて処理するシステム及び方法に関する。 The present invention relates to a system and method for drying and treating organic sludge using a waste incinerator.
　従来、有機汚泥を乾燥や炭化によって燃料化するにあたって、種々の装置及び方法が提案されている。例えば、特許文献１には、セメント製造工程におけるクリンカクーラーからの抽気ガスを熱源として利用して有機汚泥を乾燥させ、乾燥した有機汚泥をキルンバーナー等で燃焼処理し、乾燥工程において生じる排ガスは、セメント製造工程の７００℃以上の部位に導入して脱臭することなどが記載されている。 Conventionally, various apparatuses and methods have been proposed for converting organic sludge into fuel by drying or carbonization. For example, in Patent Document 1, the organic sludge is dried using the extraction gas from the clinker cooler in the cement manufacturing process as a heat source, the dried organic sludge is burned with a kiln burner or the like, and the exhaust gas generated in the drying process is It describes that it is deodorized by introducing it at a temperature of 700 ° C. or higher in the cement manufacturing process.
  また、特許文献２には、予め製造した乾燥汚泥の表面に脱水ケーキを混合し、この混合汚泥を乾燥させた後の乾燥排ガスを乾燥ファンにて誘引し、誘引した乾燥排ガスの一部（１次乾燥排ガス）を第１のダクトを通じて高温空気と混合して混合汚泥の乾燥に用い、乾燥排ガスの残部（２次乾燥排ガス）を第２のダクトを通じて燃焼炉に導入して脱臭処理することなどにより、セメント工場で発生する高温空気を熱源として、安全で安定した有機汚泥の乾燥操作を行い、排ガスの脱臭処理について省エネルギー化を図る技術が開示されている。 Further, in Patent Document 2, a dehydrated cake is mixed on the surface of dried sludge produced in advance, and the dried exhaust gas after drying the mixed sludge is attracted by a drying fan, and a part of the attracted dried exhaust gas (1 Secondary dry exhaust gas) is mixed with high-temperature air through the first duct and used to dry the mixed sludge, and the remainder of the dry exhaust gas (secondary dry exhaust gas) is introduced into the combustion furnace through the second duct for deodorization, etc. Thus, a technique for saving energy in the deodorization treatment of exhaust gas by performing a safe and stable drying operation of organic sludge using high-temperature air generated in a cement factory as a heat source is disclosed.
日本国特開２００６－３５１８９号公報Japanese Unexamined Patent Publication No. 2006-35189 日本国特開２００５－２５４０５５号公報Japanese Unexamined Patent Publication No. 2005-254055
　しかし、有機汚泥は、細胞壁の内部の生体水としての水分を約８０％保有し、この水分を除去するための熱量と、乾燥後に燃料として用いた場合に得られる熱量とが略々拮抗している。そこで、有機汚泥の乾燥に要するコストをできるだけ低く抑えるため、従来、セメント製造工場で排出される廃熱を利用したり、有償の廃プラスチックを熱源とする方法が提案されている。その場合、例えば、プレヒータ排ガスの温度は最高で約４５０℃であり、廃プラスチックを熱源とする場合も、４００℃以上で燃焼させようとした場合には、塩酸（ＨＣＬ）による腐食が深刻な問題となる。腐食の問題については、技術的に解決可能であるが、その際、特殊な材料を用いる必要があるため、設備コストが高くなる。そのため、有機汚泥の乾燥には４００℃以下の熱ガスを用いなければならず、この場合、有機汚泥の処理設備を小型化するためには、有機汚泥に含まれる水分の蒸発効率、及び有機汚泥の乾燥速度を高める工夫が必要となる。 However, organic sludge retains about 80% of the water as biological water inside the cell wall, and the amount of heat for removing this water and the amount of heat obtained when used as fuel after drying are almost in competition. Yes. Thus, in order to keep the cost required for drying organic sludge as low as possible, conventionally, a method of using waste heat discharged from a cement manufacturing plant or using paid plastic waste as a heat source has been proposed. In that case, for example, the temperature of the preheater exhaust gas is about 450 ° C. at the maximum, and even when waste plastic is used as a heat source, corrosion by hydrochloric acid (HCL) is a serious problem when trying to burn above 400 ° C. It becomes. The problem of corrosion can be technically solved, but at that time, it is necessary to use a special material, which increases the equipment cost. Therefore, a hot gas of 400 ° C. or lower must be used for drying the organic sludge. In this case, in order to reduce the size of the organic sludge treatment equipment, the evaporation efficiency of the water contained in the organic sludge, and the organic sludge are reduced. It is necessary to devise a technique to increase the drying speed of the sushi.
　また、有機汚泥を処理する際には、有機汚泥の燃料化操作によって生じる悪臭を帯びた汚水や、排ガス処理のために新たなエネルギーや費用が発生する。有機汚泥を乾燥させた際に発生したガスは、そのほとんどを燃焼処理しているが、発生したガスに含まれる水蒸気まで燃焼処理を行うと、その分の熱量が必要となり、乾燥コストが増加する。そこで、水蒸気を凝縮させて分離処理する方法も提案されているが、凝縮水に関しての廃水処理について言及した提案は存在しない。 Also, when treating organic sludge, new energy and costs are generated for the treatment of malodorous sewage generated by the operation of organic sludge as fuel and exhaust gas treatment. Most of the gas generated when the organic sludge is dried is burned. However, if the burning process is performed up to the water vapor contained in the generated gas, the amount of heat is required and the drying cost increases. . Then, although the method of condensing water vapor | steam and the separation process is also proposed, the proposal which referred to the waste water process regarding condensed water does not exist.
　そこで、本発明は、上記従来の技術における問題点に鑑みてなされたものであって、有機汚泥に含まれる水分の蒸発効率、及び有機汚泥の乾燥速度を高めることにより、有機汚泥の処理設備を小型化するとともに、凝縮水を効率よく処理することのできる乾燥処理システム等を提供することを目的とする。 Therefore, the present invention has been made in view of the problems in the above-described conventional technology, and by increasing the evaporation efficiency of moisture contained in the organic sludge and the drying rate of the organic sludge, an organic sludge treatment facility is provided. It aims at providing the drying processing system etc. which can process a condensed water efficiently while reducing in size.
　上記目的を達成するため、本発明は、有機汚泥の乾燥処理システムであって、有機汚泥を乾燥させるための熱源を廃棄物焼却炉から排出される４５０℃以下の排ガスとする有機汚泥乾燥装置と、該有機汚泥乾燥装置による乾燥により発生した水蒸気を凝縮させる水蒸気凝縮装置と、該水蒸気凝縮装置によって凝縮された水を焼却灰の冷却及び水洗に利用する焼却灰水冷水洗装置とを備えることを特徴とする。 In order to achieve the above object, the present invention is an organic sludge drying treatment system, wherein a heat source for drying organic sludge is an organic sludge drying device that uses exhaust gas of 450 ° C. or less discharged from a waste incinerator, A water vapor condensing device for condensing water vapor generated by drying by the organic sludge drying device, and an incinerated ash water cold water washing device for using the water condensed by the water vapor condensing device for cooling and washing the incinerated ash. And
　そして、本発明によれば、廃棄物焼却炉の廃熱を利用しながら、水蒸気を凝縮分離して水蒸気の燃焼処理を不要とし、凝縮水を焼却灰の水洗に利用することで焼却灰の水洗処理用水を賄うことができるため、設備コスト及び運転コストを低く抑えながら、有機汚泥の乾燥と焼却灰の冷却及び水洗とを同時に行うことができる。 According to the present invention, while using the waste heat of the waste incinerator, the water vapor is condensed and separated to eliminate the need for the combustion treatment of the water vapor, and the condensed water is used for washing the incineration ash to wash the incineration ash. Since the treatment water can be covered, it is possible to simultaneously dry the organic sludge, cool the incinerated ash, and wash with water while keeping the equipment cost and operation cost low.
　上記有機汚泥の乾燥処理システムに、さらに、前記有機汚泥乾燥装置内、又は該有機汚泥乾燥装置の前段に、前記有機汚泥中のたんばく質を分解する物質を添加する分解物質添加装置を設けることができ、分解物質添加装置より有機汚泥中のたんばく質を分解する物質を添加することにより、有機汚泥に含まれる細胞の細胞壁を破壊することができ、細胞壁の内部の生体水を露出させることで、この水分の蒸発効率を高め、ひいては有機汚泥を効率よく乾燥させることができる。 The organic sludge drying treatment system is further provided with a decomposition substance addition device for adding a substance for degrading the protein in the organic sludge in the organic sludge drying device or in the preceding stage of the organic sludge drying device. It is possible to destroy the cell wall of cells contained in organic sludge by adding a substance that decomposes the protein in organic sludge from the decomposition substance addition device, exposing the biological water inside the cell wall Thus, the evaporation efficiency of the water can be increased, and the organic sludge can be efficiently dried.
　上記有機汚泥の乾燥処理システムにおいて、前記熱源を、前記廃棄物焼却炉に付設された焼却ボイラーから排出される熱媒体とすることができる。焼却ボイラーから排出された過熱蒸気を用いることで、乾燥後の処理ガス量を低く抑え、ガス処理に要するコストを低減することができる。 In the organic sludge drying treatment system, the heat source can be a heat medium discharged from an incineration boiler attached to the waste incinerator. By using the superheated steam discharged from the incineration boiler, the amount of processing gas after drying can be kept low, and the cost required for gas processing can be reduced.
　上記有機汚泥の乾燥処理システムにおいて、前記廃棄物焼却炉及び前記焼却灰水冷水洗装置を、セメント製造設備に隣接させ、該廃棄物焼却炉から発生する焼却灰を該焼却灰水冷水洗装置によって水洗し、水洗した焼却灰を該セメント製造設備においてセメント原料として利用することができる。これにより、有機汚泥の乾燥、焼却灰の水洗処理、及び焼却灰の利用をすべてセメント製造設備及びその近接地域で効率よく行うことができる。 In the organic sludge drying treatment system, the waste incinerator and the incinerated ash water cold water washing apparatus are adjacent to a cement production facility, and the incinerated ash generated from the waste incinerator is washed with the incineration ash water cold water washing apparatus. The incinerated ash washed with water can be used as a cement raw material in the cement production facility. Thereby, the drying of organic sludge, the washing process of incineration ash, and the use of incineration ash can all be efficiently performed in the cement manufacturing facility and its vicinity.
　上記有機汚泥の乾燥処理システムにおいて、前記排ガス又は熱媒体によって前記有機汚泥を間接加熱することができる。これにより、有機汚泥を乾燥させた後のガスの処理が容易となり、設備コスト及び運転コストをさらに低く抑えることができる。 In the organic sludge drying treatment system, the organic sludge can be indirectly heated by the exhaust gas or the heat medium. Thereby, the process of the gas after drying organic sludge becomes easy, and installation cost and operation cost can be held down further.
　また、本発明は、有機汚泥の乾燥処理方法であって、廃棄物焼却炉から排出される４５０℃以下の排ガスを熱源として有機汚泥を乾燥させ、該乾燥により発生した水蒸気を凝縮させ、該凝縮された水を焼却灰の冷却及び水洗に利用することを特徴とする。本発明によれば、上記発明と同様に、廃棄物焼却炉の廃熱を利用し、水蒸気の燃焼処理を不要とし、凝縮水で焼却灰の冷却と水洗処理用の水を賄うことで、設備コスト及び運転コストを低く抑えながら、有機汚泥の乾燥と焼却灰の水洗とを同時に行うことができる。 The present invention is also a method for drying organic sludge, wherein the organic sludge is dried using an exhaust gas of 450 ° C. or less discharged from a waste incinerator as a heat source, the water vapor generated by the drying is condensed, and the condensation is performed. The water used is used for cooling and washing the incinerated ash. According to the present invention, similar to the above-described invention, the waste heat of the waste incinerator is used, the combustion process of water vapor is unnecessary, and the water for incineration ash cooling and water washing treatment is covered with condensed water, The organic sludge can be dried and the incinerated ash washed with water at the same time while keeping costs and operating costs low.
　上記有機汚泥の乾燥処理方法において、前記有機汚泥を乾燥させる前、又は前記有機汚泥の乾燥中に該有機汚泥中のたんばく質を分解する物質を添加することができる。これにより、有機汚泥に含まれる細胞の細胞壁を破壊し、細胞壁の内部の生体水を露出させることで、この水分の蒸発効率を高め、有機汚泥の乾燥効率を向上させることができる。 In the organic sludge drying treatment method, a substance capable of degrading the protein in the organic sludge can be added before the organic sludge is dried or during the drying of the organic sludge. Thereby, by destroying the cell walls of the cells contained in the organic sludge and exposing the biological water inside the cell walls, it is possible to increase the evaporation efficiency of the water and improve the drying efficiency of the organic sludge.
　上記有機汚泥の乾燥処理方法において、前記たんばく質を分解する物質を、強アルカリ、強酸物質及びたんばく質分解酵素のいずれか一つ以上の物質とすることができる。 In the organic sludge drying method, the substance capable of degrading the protein can be any one or more of strong alkali, strong acid substance and protein degrading enzyme.
　また、前記凝縮水を焼却灰の脱塩水として用いる際に、該凝縮水に活性炭を添加することができる。これにより、焼却灰に吸着されなかった有機酸が存在する場合でも、この有機酸を活性炭に吸着させ、水洗後の脱塩排水に有機酸が残存することを防止し、臭気を減少させることができる。 Further, when the condensed water is used as demineralized water for incineration ash, activated carbon can be added to the condensed water. As a result, even when there is an organic acid that has not been adsorbed by the incinerated ash, this organic acid is adsorbed on the activated carbon, preventing the organic acid from remaining in the desalted waste water after washing, and reducing odor. it can.
　上記有機汚泥の乾燥処理方法において、前記廃棄物焼却炉によって、廃プラスチック、都市ごみ、カーシュレッダダスト（ＡＳＲ）、木屑のいずれか一つ以上を焼却することができる。 In the organic sludge drying treatment method, one or more of waste plastic, municipal waste, car shredder dust (ASR), and wood chips can be incinerated by the waste incinerator.
　上記有機汚泥の乾燥処理方法において、前記乾燥させた有機汚泥をセメント燃料として利用するとともに、前記水洗した焼却灰をセメント原料として利用することができ、有機汚泥及び焼却灰をセメン製造工程において有効利用することができる。 In the organic sludge drying treatment method, the dried organic sludge can be used as a cement fuel, and the incinerated ash washed with water can be used as a cement raw material. The organic sludge and the incinerated ash are effectively used in a cement production process. can do.
　以上のように、本発明によれば、有機汚泥に含まれる水分の蒸発効率、及び有機汚泥の乾燥速度を高め、有機汚泥の処理設備を小型化し、凝縮水を効率よく処理することのできる乾燥処理システム等を提供することができる。 As described above, according to the present invention, the evaporation efficiency of water contained in organic sludge and the drying speed of organic sludge are increased, the processing equipment for organic sludge is miniaturized, and the drying capable of efficiently treating condensed water. A processing system or the like can be provided.
本発明にかかる有機汚泥の乾燥処理システムの一実施の形態を示す全体構成図である。1 is an overall configuration diagram showing an embodiment of an organic sludge drying treatment system according to the present invention.
  次に、本発明を実施するための形態について、図面を参照しながら詳細に説明する。 Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
　図１は、本発明にかかる有機汚泥の乾燥処理システム（以下、「乾燥処理システム」と略称する）の一実施の形態を示し、この乾燥処理システム１は、廃棄物焼却炉２からの排ガスＧ１によって過熱蒸気ＳＴを発生させる焼却ボイラー３と、過熱蒸気ＳＴを用いて有機汚泥ＳＬを乾燥させる有機汚泥乾燥装置４と、有機汚泥ＳＬ中のたんばく質を分解する物質を添加する分解物質添加装置７と、有機汚泥ＳＬの乾燥により発生したガスＧ４に含まれる水蒸気を凝縮させる水蒸気凝縮装置８と、焼却灰Ａを水洗するための焼却灰水冷水洗装置１０と、水洗により発生した脱塩水Ｌを排水処理する脱塩排水処理装置１１とを備える。 FIG. 1 shows an embodiment of an organic sludge drying treatment system (hereinafter abbreviated as “drying treatment system”) according to the present invention. This drying treatment system 1 is an exhaust gas G1 from a waste incinerator 2. An incineration boiler 3 that generates superheated steam ST, an organic sludge drying device 4 that dries organic sludge SL using superheated steam ST, and a decomposing material addition device that adds substances that decompose protein in the organic sludge SL 7, steam condensing device 8 for condensing water vapor contained in gas G4 generated by drying organic sludge SL, incinerated ash water cold water washing device 10 for washing incineration ash A, and desalted water L generated by water washing And a desalinating waste water treatment device 11 for performing waste water treatment.
　廃棄物焼却炉２は、廃プラスチック、都市ごみ、カーシュレッダダスト、木屑等を焼却処理するために備えられ、セメント製造設備（不図示）に隣接して配置される。廃棄物焼却炉２から排出される排ガスＧ１の温度は、４００℃程度（４５０℃以下）である。 The waste incinerator 2 is provided to incinerate waste plastic, municipal waste, car shredder dust, wood chips, etc., and is disposed adjacent to a cement manufacturing facility (not shown). The temperature of the exhaust gas G1 discharged from the waste incinerator 2 is about 400 ° C. (450 ° C. or less).
  焼却ボイラー３は、上記排ガスＧ１を用いて水を蒸発させて過熱蒸気ＳＴを発生させるために備えられ、廃棄物焼却炉２の廃熱を利用して発電を行うために廃棄物焼却炉２に付設されていることが多い。 The incineration boiler 3 is provided for evaporating water using the exhaust gas G1 to generate superheated steam ST, and in the waste incinerator 2 to generate power using waste heat of the waste incinerator 2. Often attached.
　有機汚泥乾燥装置４は、焼却ボイラー３から供給された過熱蒸気ＳＴを用いて有機汚泥ＳＬを乾燥させるために備えられ、有機汚泥ＳＬが投入されるホッパ部４ａと、過熱蒸気ＳＴが導入されるジャケット部４ｂと、乾燥汚泥Ｄを排出する排出部４ｃからなる外熱式（間接加熱式）の乾燥装置である。 The organic sludge drying device 4 is provided for drying the organic sludge SL using the superheated steam ST supplied from the incineration boiler 3, and the hopper unit 4a into which the organic sludge SL is charged and the superheated steam ST are introduced. It is an external heating type (indirect heating type) drying device comprising a jacket part 4b and a discharge part 4c for discharging dried sludge D.
　排ガス処理設備５は、焼却ボイラー３から排出される廃棄物焼却炉２の排ガスＧ２に含まれる硫黄酸化物（ＳＯｘ）、ＨＣｌを吸収除去するなどして無害化し、大気へ放出するために備えられる。 The exhaust gas treatment facility 5 is provided for detoxifying the sulfur oxide (SOx) and HCl contained in the exhaust gas G2 of the waste incinerator 2 discharged from the incineration boiler 3 and releasing it to the atmosphere. .
　分解物質添加装置７は、有機汚泥乾燥装置４内の有機汚泥ＳＬ中のたんばく質を分解する物質を添加するために備えられる。添加するたんばく質分解物質ＤＭには、ペプチド結合を加水分解する、水酸化ナトリウム（ＮａＯＨ）等の強アルカリ、強酸物質、細胞組織を破壊するたんばく質分解酵素等が用いられ、これら一つ以上の物質を添加することができる。尚、たんばく質分解酵素には、たんばく質を加水分解するプロテアーゼ等を用いることができ、このプロテアーゼは、アミノ酸であるセリンが重要な働きをするプロテアーゼであるセリンプロテアーゼと、アスパラギン酸のカルボキシル基（－COOH）が重要な働きをする酸性プロテアーゼと、システインのチオール基が重要な働きをするチオールプロテアーゼと、亜鉛やカルシウムなどの金属元素が重要な働きをする金属プロテアーゼに大別することができる。 The decomposition substance addition device 7 is provided for adding a substance that decomposes the protein in the organic sludge SL in the organic sludge drying device 4. As the proteolytic substance DM to be added, a strong alkali such as sodium hydroxide (NaOH), a strong acid substance, a proteolytic enzyme that destroys cell tissues, etc., which hydrolyzes peptide bonds, are used. The above substances can be added. As the protein degrading enzyme, a protease that hydrolyzes the protein can be used. This protease includes a serine protease, which is an amino acid serine, and a carboxylate of aspartic acid. The group can be roughly divided into acidic proteases in which the group (-COOH) plays an important role, thiol proteases in which the cysteine thiol group plays an important role, and metal proteases in which metal elements such as zinc and calcium play an important role it can.
  水蒸気凝縮装置８は、有機汚泥ＳＬの乾燥により発生したガスＧ４中の水蒸気を凝縮させるために備えられ、水蒸気凝縮装置８に冷却水Ｃを供給してこの水蒸気を冷却して凝縮させる。 The water vapor condensing device 8 is provided for condensing water vapor in the gas G4 generated by drying the organic sludge SL, and supplies the cooling water C to the water vapor condensing device 8 to cool and condense the water vapor.
　焼却灰水冷水洗装置１０（水没ピット）は、都市ごみ焼却設備等から受け入れた焼却灰Ａを水洗して塩素分を除去するために備えられ、この水洗には、水蒸気凝縮装置８からの凝縮水Ｗが利用される。 The incinerated ash water cold water washing device 10 (submerged pit) is provided for washing the incinerated ash A received from municipal waste incineration facilities and the like to remove chlorine, and this water washing includes condensed water from the steam condenser 8. W is used.
　脱塩排水処理装置１１は、焼却灰水冷水洗装置１０から排出された脱塩水Ｌを排水処理して放流可能な状態にするために備えられる。 The desalted waste water treatment device 11 is provided to drain the desalted water L discharged from the incinerated ash water cold water washing device 10 so that it can be discharged.
　次に、上記構成を有する乾燥処理システム１を用いた有機汚泥の乾燥処理方法について、図１を参照しながら説明する。 Next, an organic sludge drying treatment method using the drying treatment system 1 having the above configuration will be described with reference to FIG.
　廃棄物焼却炉２の運転中に、廃棄物焼却炉２から排出された排ガスＧ２を焼却ボイラー３に導入し、過熱蒸気ＳＴを発生させる。発生した過熱蒸気ＳＴを有機汚泥乾燥装置４に供給し、有機汚泥ＳＬの乾燥に利用する。一方、焼却ボイラー３から排出された排ガスＧ２は、排ガス処理設備５において硫黄酸化物等の有害物質が除去された後、大気へ放出される。 During operation of the waste incinerator 2, the exhaust gas G2 discharged from the waste incinerator 2 is introduced into the incineration boiler 3 to generate superheated steam ST. The generated superheated steam ST is supplied to the organic sludge drying device 4 and used for drying the organic sludge SL. On the other hand, the exhaust gas G2 discharged from the incineration boiler 3 is released to the atmosphere after harmful substances such as sulfur oxides are removed in the exhaust gas treatment facility 5.
　受け入れた有機汚泥ＳＬを有機汚泥乾燥装置４のホッパ部４ａに投入する一方、焼却ボイラー３からの過熱蒸気ＳＴをジャケット部４ｂに導入し、４００℃程度の過熱蒸気ＳＴの有する熱によって有機汚泥ＳＬを乾燥させる。ここで、分解物質添加装置７からたんばく質分解物質ＤＭを投入し、有機汚泥ＳＬ中のたんばく質を分解させながら有機汚泥ＳＬを乾燥させる。これにより、有機汚泥ＳＬに含まれる細胞の細胞壁を破壊するなどして細胞壁の内部の生体水を露出させ、生体水の蒸発効率を高め、有機汚泥ＳＬを効率よく乾燥させることができる。乾燥汚泥Ｄは、排出部４ｃを介して外部に排出され、燃料等として利用することができる。一方、有機汚泥ＳＬの乾燥に用いた過熱蒸気ＳＴは、焼却ボイラー３に戻され、焼却ボイラー３と有機汚泥乾燥装置４の間を循環する。 The received organic sludge SL is introduced into the hopper portion 4a of the organic sludge drying device 4, while the superheated steam ST from the incineration boiler 3 is introduced into the jacket portion 4b, and the organic sludge SL is heated by the heat of the superheated steam ST of about 400 ° C. Dry. Here, the protein decomposing substance DM is introduced from the decomposing substance adding device 7, and the organic sludge SL is dried while decomposing the protein in the organic sludge SL. Thereby, the biological water inside a cell wall is exposed by destroying the cell wall of the cell contained in organic sludge SL, etc., the evaporation efficiency of biological water can be improved, and organic sludge SL can be dried efficiently. The dried sludge D is discharged to the outside through the discharge unit 4c and can be used as fuel or the like. On the other hand, the superheated steam ST used for drying the organic sludge SL is returned to the incineration boiler 3 and circulates between the incineration boiler 3 and the organic sludge drying device 4.
　次に、有機汚泥乾燥装置４から排出されたガスＧ４を水蒸気凝縮装置８に導入し、冷却水ＣによってガスＧ４に含まれる水蒸気を冷却して凝縮させる。凝縮した凝縮水Ｗを焼却灰水冷水洗装置１０に供給し、焼却灰Ａの水洗処理用水に利用する。一方、水蒸気凝縮装置８から排出された乾燥ガスＧ５を廃棄物焼却炉２に導入して臭気を分解する。ここで、水蒸気凝縮装置８によってガスＧ４に含まれる水蒸気を凝縮させて水分を除去したことから、乾燥ガスＧ５には、水蒸気が含まれていないため、水蒸気の燃焼処理が不要となり、その分廃棄物焼却炉２における熱効率の低下を抑えることができる。 Next, the gas G4 discharged from the organic sludge drying device 4 is introduced into the water vapor condensing device 8, and the water vapor contained in the gas G4 is cooled and condensed by the cooling water C. Condensed condensed water W is supplied to the incineration ash water cold water washing apparatus 10 and used for water for the washing treatment of the incineration ash A. On the other hand, the dry gas G5 discharged from the steam condenser 8 is introduced into the waste incinerator 2 to decompose odor. Here, since the water vapor contained in the gas G4 is condensed by the water vapor condensing device 8 to remove the water, since the dry gas G5 does not contain water vapor, the water vapor does not need to be combusted and is discarded accordingly. A decrease in thermal efficiency in the material incinerator 2 can be suppressed.
　次に、焼却灰水冷水洗装置１０において焼却灰Ａを水洗して塩素分を除去し、水洗後、焼却灰Ａを隣接するセメント製造設備においてセメント原料Ｒとして利用する。一方、水洗後の焼却灰水冷水洗装置１０から排出された塩素分を含む脱塩水Ｌを、脱塩排水処理装置１１において排水処理し、放流水ＲＬとして河川等に放流する。 Next, the incineration ash water cold water rinsing apparatus 10 washes the incineration ash A to remove chlorine, and after rinsing, the incineration ash A is used as a cement raw material R in an adjacent cement manufacturing facility. On the other hand, the desalted water L containing the chlorine content discharged from the incinerated ash water cold water washing apparatus 10 after the water washing is drained in the desalting drainage treatment apparatus 11 and discharged into a river or the like as the discharged water RL.
　尚、有機汚泥の臭気は、乾燥汚泥Ｄ、乾燥後に発生する乾燥ガスＧ５、凝縮水分離後の凝縮水Ｗ及び乾燥ガスＧ５のいずれにも存在する。また、凝縮水Ｗ中には有機酸が存在する。凝縮水Ｗに含まれる有機酸は焼却灰Ａに吸着されるので、水洗処理後の脱塩水Ｌの有機酸含有量は少なく、臭気も少ないものと考えられるが、焼却灰水冷水洗装置１０内に活性炭を添加することで、焼却灰Ａに吸着されなかった有機酸が存在する場合でも、この有機酸を活性炭に吸着させ、水洗後の脱塩水Ｌに有機酸が残存することを防止することができる。 The odor of the organic sludge is present in any of the dried sludge D, the dried gas G5 generated after drying, the condensed water W after separation of condensed water, and the dried gas G5. In addition, an organic acid is present in the condensed water W. Since the organic acid contained in the condensed water W is adsorbed by the incineration ash A, the organic acid content of the demineralized water L after the water washing treatment is considered to be low and odor is also low. By adding activated carbon, even when there is an organic acid that has not been adsorbed by the incineration ash A, the organic acid can be adsorbed to the activated carbon and prevented from remaining in the demineralized water L after washing with water. it can.
　尚、上記実施の形態において、有機汚泥乾燥装置４に外熱式の乾燥装置を用いた場合を例示したが、焼却ボイラー３からの過熱蒸気ＳＴと、分解物質添加装置７に供給された有機汚泥ＳＬとが直接接触する直接加熱式を採用することもできる。 In addition, in the said embodiment, although the case where the external-heat-type drying apparatus was used for the organic sludge drying apparatus 4 was illustrated, the superheated steam ST from the incineration boiler 3 and the organic sludge supplied to the decomposition substance addition apparatus 7 A direct heating method in which SL is in direct contact can also be adopted.
　また、分解物質添加装置７からたんばく質分解物質ＤＭを有機汚泥乾燥装置４に投入したが、有機汚泥乾燥装置４の前段で有機汚泥ＳＬに添加してもよい。 In addition, although the protein decomposing substance DM is introduced into the organic sludge drying apparatus 4 from the decomposing substance adding apparatus 7, it may be added to the organic sludge SL before the organic sludge drying apparatus 4.
１　乾燥処理システム
２　廃棄物焼却炉
３　焼却ボイラー
４　有機汚泥乾燥装置
４ａ　ホッパ部
４ｂ  ジャケット部
４ｃ  排出部
５　排ガス処理設備
７　分解物質添加装置
８　水蒸気凝縮装置
１０　焼却灰水冷水洗装置
１１　脱塩排水処理装置
Ａ　焼却灰
Ｃ  冷却水
Ｄ　乾燥汚泥
ＤＭ　タンパク質分解物質
Ｇ１～Ｇ３　排ガス
Ｇ４　ガス（有機汚泥の乾燥により発生したガス）
Ｇ５  乾燥ガス
Ｌ  脱塩水
Ｒ　セメント原料
ＲＬ　放流水
ＳＬ　有機汚泥
ＳＴ  過熱蒸気
Ｗ　凝縮水 DESCRIPTION OF SYMBOLS 1 Drying treatment system 2 Waste incinerator 3 Incineration boiler 4 Organic sludge drying apparatus 4a Hopper part 4b Jacket part 4c Discharge part 5 Exhaust gas treatment equipment 7 Decomposition substance addition apparatus 8 Steam condensing apparatus 10 Incinerated ash water cold water washing apparatus 11 Desalination drainage treatment Equipment A Incinerated ash C Cooling water D Dry sludge DM Proteolytic substances G1 to G3 Exhaust gas G4 gas (gas generated by drying organic sludge)
G5 Dry gas L Demineralized water R Cement raw material RL Discharged water SL Organic sludge ST Superheated steam W Condensed water

Claims (11)

  1. 　有機汚泥を乾燥させるための熱源を廃棄物焼却炉から排出される４５０℃以下の排ガスとする有機汚泥乾燥装置と、
    　該有機汚泥乾燥装置による乾燥により発生した水蒸気を凝縮させる水蒸気凝縮装置と、
    　該水蒸気凝縮装置によって凝縮された水を焼却灰の水冷及び水洗に利用する焼却灰水冷水洗装置とを備えることを特徴とする有機汚泥の乾燥処理システム。     An organic sludge drying apparatus that uses an exhaust gas of 450 ° C. or less discharged from a waste incinerator as a heat source for drying the organic sludge;
    A water vapor condensing device for condensing water vapor generated by drying by the organic sludge drying device;
    An organic sludge drying treatment system comprising: an incinerated ash water-cooled water washing device that uses water condensed by the water vapor condensing device for water cooling and washing of the incinerated ash.
  2. 　さらに、前記有機汚泥乾燥装置内、又は該有機汚泥乾燥装置の前段に、前記有機汚泥中のたんばく質を分解する物質を添加する分解物質添加装置を備えることを特徴とする請求項１に記載の有機汚泥の乾燥処理システム。 Furthermore, the degradation substance addition apparatus which adds the substance which decomposes | disassembles the protein in the said organic sludge in the said organic sludge drying apparatus or the front | former stage of this organic sludge drying apparatus is provided. Organic sludge drying treatment system.
  3. 　前記熱源は、前記廃棄物焼却炉に付設された焼却ボイラーから排出される熱媒体であることを特徴とする請求項１又は２に記載の有機汚泥の乾燥処理システム。 The organic sludge drying treatment system according to claim 1 or 2, wherein the heat source is a heat medium discharged from an incineration boiler attached to the waste incinerator.
  4. 　前記廃棄物焼却炉及び前記焼却灰水冷水洗装置は、セメント製造設備に隣接され、該廃棄物焼却炉から発生する焼却灰が該焼却灰水冷水洗装置によって水洗され、水洗した焼却灰を該セメント製造設備においてセメント原料として利用することを特徴とする請求項１、２又は３に記載の有機汚泥の乾燥処理システム。 The waste incinerator and the incineration ash water cold water washing apparatus are adjacent to a cement production facility, the incineration ash generated from the waste incinerator is washed with the incineration ash water cold water washing apparatus, and the washed incineration ash is produced into the cement. 4. The organic sludge drying treatment system according to claim 1, 2 or 3, which is used as a cement raw material in equipment.
  5. 　前記排ガス又は熱媒体によって前記有機汚泥を間接加熱することを特徴とする請求項１乃至４のいずれかに記載の有機汚泥の乾燥処理システム。 The organic sludge drying treatment system according to any one of claims 1 to 4, wherein the organic sludge is indirectly heated by the exhaust gas or the heat medium.
  6. 　廃棄物焼却炉から排出される４５０℃以下の排ガスを熱源として有機汚泥を乾燥させ、
    　該乾燥により発生した水蒸気を凝縮させ、
    　該凝縮された水を焼却灰の水洗に利用することを特徴とする有機汚泥の乾燥処理方法。     Drying organic sludge using 450 ° C or less exhaust gas discharged from a waste incinerator as a heat source,
    Water vapor generated by the drying is condensed,
    A method for drying treatment of organic sludge, wherein the condensed water is used for washing incinerated ash.
  7. 　前記有機汚泥を乾燥させる前、又は前記有機汚泥の乾燥中に該有機汚泥中のたんばく質を分解する物質を添加することを特徴とする請求項６に記載の有機汚泥の乾燥処理方法。 7. The method for drying treatment of organic sludge according to claim 6, wherein a substance that decomposes the protein in the organic sludge is added before the organic sludge is dried or during the drying of the organic sludge.
  8. 　前記たんばく質を分解する物質が、強アルカリ、強酸物質及びたんばく質分解酵素のいずれか一つ以上の物質からなることを特徴とする請求項７に記載の有機汚泥の乾燥処理方法。 The method for drying treatment of organic sludge according to claim 7, wherein the substance that decomposes the protein comprises at least one of a strong alkali, a strong acid substance, and a protein-degrading enzyme.
  9. 　前記凝縮水を焼却灰の脱塩水として用いる際に、該凝縮水に活性炭を添加することを特徴とする請求項６、７又は８に記載の有機汚泥の乾燥処理方法。 9. The method for drying treatment of organic sludge according to claim 6, 7 or 8, wherein activated carbon is added to the condensed water when the condensed water is used as demineralized water for incineration ash.
  10. 　前記廃棄物焼却炉は、廃プラスチック、都市ごみ、カーシュレッダダスト、木屑のいずれか一つ以上を焼却することを特徴とする請求項６乃至９のいずれかに記載の有機汚泥の乾燥処理方法。 10. The method for drying organic sludge according to claim 6, wherein the waste incinerator incinerates at least one of waste plastic, municipal waste, car shredder dust, and wood waste.
  11. 　前記乾燥させた有機汚泥をセメント燃料として利用するとともに、前記水洗した焼却灰をセメント原料として利用することを特徴とする請求項６乃至１０のいずれかに記載の有機汚泥の乾燥処理方法。 11. The method for drying treatment of organic sludge according to claim 6, wherein the dried organic sludge is used as a cement fuel, and the incinerated ash washed with water is used as a cement raw material.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102297438A (en) * 2011-05-30 2011-12-28 华北电力大学（保定） Fume condensed-water flue-dust conveyance system of supercharged oxygen-enriched coal-fired boiler
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WO2012119737A1 (en) * 2011-03-04 2012-09-13 Friedrich-Wilhelm Evers Processing of waste incineration ashes
CN104033905A (en) * 2014-06-23 2014-09-10 杨义军 System for combustible waste co-processing in cement kiln with bypass exhaust and waste heat power generation
CN107500495A (en) * 2017-08-17 2017-12-22 侨银环保科技股份有限公司 A kind of municipal sludge processing system
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60126512A (en) * 1983-12-12 1985-07-06 Ishigaki Kiko Kk Sludge treatment
JPH09234451A (en) * 1995-12-28 1997-09-09 Ebara Corp Waste treatment
JPH11138144A (en) * 1997-11-12 1999-05-25 Toshiba Corp Garbage drying and treating apparatus
JP2001025799A (en) * 1999-07-15 2001-01-30 Osaka Gas Co Ltd Treatment of sludge and sludge treating system
JP2004202449A (en) * 2002-12-26 2004-07-22 Kowa Co Method for removing heavy metal in incineration ash
JP2005291526A (en) * 2004-03-31 2005-10-20 Babcock Hitachi Kk Device and method for drying biomass fuel
JP2008114173A (en) * 2006-11-06 2008-05-22 Sumitomo Osaka Cement Co Ltd Method and apparatus for treating high-water content organic waste

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60126512A (en) * 1983-12-12 1985-07-06 Ishigaki Kiko Kk Sludge treatment
JPH09234451A (en) * 1995-12-28 1997-09-09 Ebara Corp Waste treatment
JPH11138144A (en) * 1997-11-12 1999-05-25 Toshiba Corp Garbage drying and treating apparatus
JP2001025799A (en) * 1999-07-15 2001-01-30 Osaka Gas Co Ltd Treatment of sludge and sludge treating system
JP2004202449A (en) * 2002-12-26 2004-07-22 Kowa Co Method for removing heavy metal in incineration ash
JP2005291526A (en) * 2004-03-31 2005-10-20 Babcock Hitachi Kk Device and method for drying biomass fuel
JP2008114173A (en) * 2006-11-06 2008-05-22 Sumitomo Osaka Cement Co Ltd Method and apparatus for treating high-water content organic waste

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012119737A1 (en) * 2011-03-04 2012-09-13 Friedrich-Wilhelm Evers Processing of waste incineration ashes
CN102297438A (en) * 2011-05-30 2011-12-28 华北电力大学（保定） Fume condensed-water flue-dust conveyance system of supercharged oxygen-enriched coal-fired boiler
CN102600693A (en) * 2012-02-28 2012-07-25 胡彬 Method for waste steam recycling system
CN104033905A (en) * 2014-06-23 2014-09-10 杨义军 System for combustible waste co-processing in cement kiln with bypass exhaust and waste heat power generation
CN107500495A (en) * 2017-08-17 2017-12-22 侨银环保科技股份有限公司 A kind of municipal sludge processing system
CN110314921A (en) * 2019-07-08 2019-10-11 赛铂特瑞(重庆)过滤技术有限公司 A kind of closed centrifugal separating device of thick slag and method
CN110314921B (en) * 2019-07-08 2022-03-22 赛铂特瑞(重庆)过滤技术有限公司 Coarse slag closed centrifugal separation device and method
CN111499152A (en) * 2020-04-09 2020-08-07 中国一冶集团有限公司 Rotary-digging sludge drying treatment device and method
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