KR101779136B1 - Method for manufacturing pellet using sewage sludge - Google Patents

Method for manufacturing pellet using sewage sludge Download PDF

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KR101779136B1
KR101779136B1 KR1020160104106A KR20160104106A KR101779136B1 KR 101779136 B1 KR101779136 B1 KR 101779136B1 KR 1020160104106 A KR1020160104106 A KR 1020160104106A KR 20160104106 A KR20160104106 A KR 20160104106A KR 101779136 B1 KR101779136 B1 KR 101779136B1
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sludge
sewage sludge
raw material
hopper
pellet
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KR1020160104106A
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Korean (ko)
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김상범
박명석
허주훈
김달태
허길영
조현진
김경희
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한국남부발전 주식회사
아쿠아셀 주식회사
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/002—High gradient magnetic separation
    • 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
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • 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
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C10L5/36—Shape
    • C10L5/363—Pellets or granulates
    • 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
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • C10L5/442—Wood or forestry waste
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/08—Drying or removing water
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/24—Mixing, stirring of fuel components
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/30—Pressing, compressing or compacting
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/32—Molding or moulds
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
    • 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

Abstract

Disclosed is an invention related to a method for producing pellets using sewage sludge. The disclosed method for producing pellets using sewage sludge comprises the following steps: a sludge preparation step for preparing sewage sludge; a woody raw material preparation step for preparing a woody raw material including at least one of wood chips, sawdust and waste wood; a sludge storage step for transferring the sewage sludge to be stored in a first hopper; a woody raw material storage step for transferring the woody raw material to a second hopper; a mixing step for transferring the sewage sludge of the first hopper and the woody raw material of the second hopper to a conveying conveyor and mixing the same in a mixer to form a blend; and a pellet drying and molding step for transferring the blend to the conveying conveyor, drying and molding the blend by using compression heat and frictional heat generated during processing, thereby producing sludge pellets. Since the sludge pellets are automatically dried by using the frictional heat and the compressed heat of first and second molding machines, it is possible to eliminate a conventional hot-air drying apparatus, thereby reducing an installation space and negligent accidents such as fire.

Description

하수 슬러지를 이용한 펠릿제조방법{METHOD FOR MANUFACTURING PELLET USING SEWAGE SLUDGE}[0001] METHOD FOR MANUFACTURING PELLET USING SEWAGE SLUDGE [0002]

본 발명은 하수 슬러지를 이용한 펠릿제조방법에 관한 것으로서, 더욱 상세하게는, 하수 슬러지와 우드칩, 폐목재, 톱밥을 포함한 목질원료를 설정 비율로 혼합하여 배합물을 만든 후, 이송하여 제1,제2성형기를 각각 거치면서 마찰열과 압축열을 이용하여 슬러지펠릿을 건조하므로 버려지는 하수 슬러지를 이용하여 슬러지펠릿을 제조하여 비용을 절감하고, 기존에 사용되던 열풍건조장치를 삭제하여 설치 공간을 절약할 수 있는 하수 슬러지를 이용한 펠릿제조방법에 관한 것이다.The present invention relates to a method for producing pellets using sewage sludge, and more particularly, to a method for producing a pellet using sewage sludge, and more particularly, to a method for producing a pellet using sewage sludge, 2 Drying of sludge pellets by using frictional heat and compression heat while passing through each molding machine. Sludge pellet is produced by using waste sludge to reduce the cost, and it is possible to save installation space by eliminating the existing hot air drying device The present invention relates to a method for producing pellets using sewage sludge.

일반적으로, 화력 발전소는 석탄과 석유등을 이용하여 화력을 발생시키고, 발생된 열을 이용하여 보일러를 가동하고 터빈을 구동하여 발전기에서 전기를 생산하게 된다. Generally, a thermal power plant generates a thermal power by using coal and oil, operates the boiler by using the generated heat, and drives the turbine to produce electricity from the generator.

이와 같이, 기존 화력발전소에는 석탄, 석유 등을 이용하여 전기를 생산하는 경우, 삭탁 및 석유를 태우는 과정에서 다량의 이산화탄소가 발생하게 되므로 이로 인해 대기오염을 증가시켜 오존증가 등 지구 환경이 파괴되는 문제점이 있다. 이를 개선하기 이해 최근에는 친환경 원료인 우드 펠릿을 이용하여 전기를 생산하는 추세이다.As described above, in the case of producing electricity using coal and oil in a conventional thermal power plant, a large amount of carbon dioxide is generated in the process of cutting off and burning oil, thereby increasing air pollution, . Understanding how to improve it In recent years, electricity is being produced using wood pellets, an environmentally friendly material.

우드펠릿은 목재, 우드칩, 톱밥을 포함한 목질재료를 이용하여 제조되는 펠릿이다. 기존의 목질재료를 이용한 펠릿 제조방법에는 목질재료를 분쇄기를 이용하여 분쇄한 후, 열풍건조장치의 열풍을 이용하여 전조시켜 펠릿을 제조하도록 한다.Wood pellets are pellets made using wood materials, including wood, wood chips and sawdust. In the conventional method for producing pellets using a woody material, the woody material is pulverized using a pulverizer, and the pellet is produced by hot rolling the hot air of the hot air dryer.

그런데, 기존의 필릿 제조방법은 목질재료를 분쇄한 후 반드시 열풍건조장치를 이용하여 건조해야 하는 열풍건조장치의 운영비, 연료비 등 운용비용이 증가하고, 열풍공급장치의 설치공간이 필요하므로 더 넓은 설비면적이 필요하며, 열풍공급장치를 운영하는 과정에서 화재, 폭발 등의 안전사고가 발생하는 문제점이 있다.However, the conventional method of manufacturing the fillet requires an installation space of the hot air supply device because the operation cost and the fuel cost of the hot air drying device, which must be dried using the hot air drying device after crushing the woody material, There is a problem that a safety accident such as a fire or an explosion occurs in the process of operating the hot air supply device.

따라서, 이를 개선할 필요성이 요청된다.Therefore, there is a need to improve this.

본 발명의 배경기술은 한국 등록특허공보 제10-1609696호(2016.03.31, 발명의 명칭: 표고버섯 폐톱밥을 이용한 우드펠릿 제조방법)가 제시된 바 있다. The background art of the present invention is disclosed in Korean Patent Registration No. 10-1609696 (the name of the invention: a method for producing wood pellets using waste wood pulp).

본 발명은 상기와 같은 필요성에 의해 창출된 것으로서, 하수 슬러지와 우드칩, 폐목재, 톱밥을 포함한 목질원료를 설정 비율로 혼합하여 배합물을 만든 후, 이송하여 제1,제2성형기를 각각 거치면서 마찰열과 압축열을 이용하여 슬러지펠릿을 건조하므로 버려지는 하수 슬러지를 이용하여 슬러지펠릿을 제조하여 비용을 절감할 수 있고, 기존에 사용되던 열풍건조장치를 삭제하므로 설치공간을 줄일 수 있는 하수 슬러지를 이용한 펠릿제조방법를 제공하는 데 그 목적이 있다.The present invention has been made in view of the above-mentioned need, and it is an object of the present invention to provide a method of mixing woody raw materials including sewage sludge, wood chip, waste wood and sawdust at a predetermined ratio, By drying the sludge pellets using frictional heat and compressed heat, sludge pellets can be manufactured using waste sludge to reduce the cost, and sewage sludge that can reduce the installation space is eliminated because the existing hot air drying device is eliminated And to provide a method for producing pellets using the same.

상기한 목적을 달성하기 위하여 본 발명의 하수 슬러지를 이용한 펠릿제조방법은, 하수 슬러지를 준비하는 슬러지준비단계; 우드칩, 톱밥, 폐목재 중 적어도 어느 하나를 포함한 목질원료를 준비하는 목질원료준비단계; 상기 허수 슬러지를 이송하여 제1호퍼에 저장하는 슬러지저장단계; 상기 목질원료를 이송하여 제2호퍼에 저장하는 목질원료저장단계; 상기 제1호퍼의 하수 슬러지와 상기 제2호퍼의 목질원료를 이송컨베이어로 이송하여 혼합기에서 혼합하여 배합물을 만드는 혼합단계; 및 상기 배합물을 이송컨베이어로 이송하여 가공시 발생하는 압축열 및 마찰열을 이용하여 건조하면서 성형하여 슬러지펠릿을 제조하는 펠릿건조성형단계;를 포함하는 것을 특징으로 한다.According to an aspect of the present invention, there is provided a method of manufacturing a pellet using sewage sludge, comprising: preparing a sludge for preparing sewage sludge; A woody raw material preparation step of preparing a woody raw material including at least one of wood chips, sawdust, and waste wood; A sludge storage step of transferring the imaginary sludge into a first hopper; A woody raw material storing step of transferring the woody raw material and storing it in a second hopper; Transferring the sewage sludge of the first hopper and the woody raw material of the second hopper to a conveying conveyor and mixing them in a mixer to form a blend; And a pellet drying and molding step of transferring the compound to a conveying conveyor, and drying and molding the pellet using the heat of compression and frictional heat generated during processing, thereby producing sludge pellets.

또한, 상기 슬러지저장단계에서 상기 하수 슬러지를 이송컨베이어로 이송하면서 상기 하수 슬러지에서 발생하는 악취를 포집유닛으로 포집하여 제거하는 악취제거단계;를 더 포함하는 것을 특징으로 한다.The malodor removing method may further include a malodor removing step of collecting the malodor generated in the sewage sludge while collecting the sewage sludge into the collecting unit while transferring the sewage sludge to the transfer conveyor in the sludge storing step.

또한, 상기 목질원료저장단계에서 상기 목질원료를 이송컨베이어로 이송하면서 상기 목질원료에 포함된 금속재를 자력선별기의 자력으로 부착하여 제거하는 금속제거단계;를 더 포함하는 것을 특징으로 한다.The method may further include a metal removing step of removing the metal material contained in the woody material by the magnetic force of the magnetic separator while removing the woody material from the woody raw material storing step and transferring the transferred woody material to the transferring conveyor.

또한, 상기 배합물은 상기 하수 슬러지 35~45 중량%와, 상기 목질원료 50~70 중량%의 혼합비율로 이루어지는 것을 특징으로 한다.Also, the combination is characterized by a mixing ratio of 35 to 45% by weight of the sewage sludge and 50 to 70% by weight of the woody raw material.

또한, 상기 펠릿건조성형단계는, 상기 배합물을 이송하고 제1성형기에 투입하여 압축 과정을 통해 발생하는 100~130℃ 온도범위의 압축열과 마찰열을 이용하여 슬러지펠릿을 1차 건조 성형하는 제1펠릿건조성형단계; 및 상기 제1성형기에 위해 1차 건조 성형된 슬러지펠릿을 이송하고 제2성형기에 투입하여 압축 과정을 통해 발생하는 130~160℃ 온도범위의 압축열과 마찰열을 이용하여 슬러지펠릿을 2차 건조 성형하는 제2펠릿건조성형단계;를 포함하는 것을 특징으로 한다.The pellet drying and molding step may include a first pelletizing step of first dry-molding the sludge pellet using compressive heat and frictional heat in the temperature range of 100 to 130 ° C, Dry molding step; The sludge pellets are transferred to a second molding machine, and the sludge pellets are secondarily dry-molded using compression heat and frictional heat in a temperature range of 130 to 160 ° C. And a second pellet drying forming step.

또한, 상기 배합물혼합단계와 상기 제1펠릿건조성형단계 사이에 상기 목질원료에서 미처 제거되지 못한 금속재를 상기 배합물에서 자력선별기를 이용하여 추가적으로 제거하는 추가금속제거단계를 더 포함하는 것을 특징으로 한다.Further, the method may further include an additional metal removing step between the mixture blending step and the first pellet drying forming step, wherein the metal material that has not been removed from the woody raw material is further removed by using a magnetic separator in the blend.

또한, 상기 배합물혼합단계와 상기 제1펠릿건조성형단계 사이에 상기 하수 슬러지에서 미처 제거하지 못한 슬러지 악취를 상기 배합물에서 포집유닛을 이용하여 추가적으로 제거하는 추가악취제거단계를 더 포함하는 것을 특징으로 한다.Further, the method further comprises a further odor eliminating step of additionally removing the sludge odor which has not been removed from the sewage sludge between the compounding mixing step and the first pellet drying forming step using the collecting unit in the formulation .

또한, 상기 포집유닛은, 천장에 설치되는 흡기덕트부; 및 상기 흡기덕트부에 연결되어 악취 공기를 흡입하도록 흡입력을 제공하는 악취공기흡입부;를 포함하는 것을 특징으로 한다.Further, the collecting unit may include: an intake duct portion installed in a ceiling; And a malodorous air suction part connected to the intake duct part to provide a suction force for sucking malodorous air.

또한, 상기 혼합기는 패들믹서기를 포함하고, 상기 패들믹서기는 500~660rpm/min의 회전속도로 회전하는 것을 특징으로 한다.Also, the mixer includes a paddle mixer, and the paddle mixer is rotated at a rotation speed of 500 to 660 rpm / min.

또한, 상기 제1성형기는 115~125rpm/min의 회전속도로 회전하고, 상기 제2성형기는 160~180rpm/min의 회전속도로 회전하는 것을 특징으로 한다.Also, the first molding machine is rotated at a rotating speed of 115 to 125 rpm / min, and the second molding machine is rotated at a rotating speed of 160 to 180 rpm / min.

본 발명에 따른 하수 슬러지를 이용한 펠릿제조방법은, 하수 슬러지와 우드칩, 폐목재, 톱밥을 포함한 목질재료를 설정 비율로 혼합하여 배합물을 만든 후, 컨베이어로 이송하여 제1,제2성형기를 각각 거치면서 제1,제2성형기의 마찰열과 압축열을 이용하여 슬러지펠릿을 건조할 수 있고, 버려지는 하수 슬러지를 활용하여 슬러지펠릿을 제조하므로 제조비용 및 운용비용을 절감할 수 있다. A method for producing pellets using sewage sludge according to the present invention comprises mixing woody materials including sewage sludge, wood chips, waste wood and sawdust at a set ratio to form a blend, and transferring the blend to a conveyor, The sludge pellet can be dried by using the frictional heat and the compressed heat of the first and second molding machines while the sludge pellet is produced by using the waste sewage sludge, thereby reducing the manufacturing cost and the operation cost.

또한, 본 발명은, 제1,제2성형기의 마찰열과 압축열을 이용하여 슬러지펠릿을 자동 건조하므로 기존에 사용되던 열풍건조장치를 삭제할 수 있어 설비의 설치공간 및 화재등 안전사고를 줄일 수 있다.In addition, since the sludge pellet is automatically dried by using the frictional heat and the compressed heat of the first and second molding machines, it is possible to eliminate the conventional hot air drying apparatus, thereby reducing safety accidents such as installation space and fire .

도 1은 본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법의 흐른도이다.
도 2는 본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법을 구현하기 위한 개략적인 구성도이다.
도 3은 도 2에서 제1,제2호퍼 주변의 확대 구성도이다.
도 4는 도 2에서 혼합기 진입 전 이송컨베이어 주변의 확대 구성도이다.1 is a flow chart of a method for producing pellets using sewage sludge according to an embodiment of the present invention.
2 is a schematic block diagram of a method for manufacturing pellets using sewage sludge according to an embodiment of the present invention.
Fig. 3 is an enlarged view of the periphery of the first and second hoppers in Fig.
Fig. 4 is an enlarged view of the vicinity of the conveying conveyor before entering the mixer in Fig. 2. Fig.

이하, 첨부된 도면들을 참조하여 본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법을 설명하도록 한다.Hereinafter, a method for producing pellets using sewage sludge according to an embodiment of the present invention will be described with reference to the accompanying drawings.

이 과정에서 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의상 과장되게 도시되어 있을 수 있다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례에 따라 달라질 수 있다. 그러므로, 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

도 1은 본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법의 흐른도이고, 도 2는 본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법을 구현하기 위한 개략적인 구성도이며, 도 3은 도 2에서 제1,제2호퍼 주변의 확대 구성도이고, 도 4는 도 2에서 혼합기 진입 전 이송컨베이어 주변의 확대 구성도이다.FIG. 1 is a flow chart of a method for producing pellets using sewage sludge according to an embodiment of the present invention. FIG. 2 is a schematic view for implementing a method for producing pellets using sewage sludge according to an embodiment of the present invention FIG. 3 is an enlarged view of the vicinity of the first and second hoppers in FIG. 2, and FIG. 4 is an enlarged view of the vicinity of the conveying conveyor before entering the mixer in FIG.

도 1 내지 도 4를 참조하면, 본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법은, 슬러지준비단계(S10), 목질원료준비단계(S20), 슬러지저장단계(S50), 목질원료저장단계(S60), 배합물혼합단계(S70) 및 펠릿건조성형단계(S80)를 포함한다.1 to 4, a method for producing pellets using sewage sludge according to an embodiment of the present invention includes a sludge preparation step S10, a woody material preparation step S20, a sludge storage step S50, A storage step S60, a blend mixing step S70, and a pellet drying forming step S80.

슬러지준비단계(S10)는 하수 슬러지(2)를 준비하는 단계이다. 하수 슬러지(2)는 하수에서 유체를 분리하여 건조하고 남은 찌꺼기로서, 건조가 이루어지면 불에 잘 탈 수 있는 유기체로 이루어진다.The sludge preparation step (S10) is a step of preparing the sewage sludge (2). Sewage sludge (2) is a remnant that is separated from the sewage and dried, and is composed of an organism that can burn well when dried.

목질원료준비단계(S20)는 우드칩, 톱밥, 폐목재 중 적어도 어느 하나를 포함한 목질원료(4)를 준비하는 단계이다. 우드칩은 건축용 목재로 사용하지 못하는 뿌리와 가지, 기타 임목 폐기물을 분리해낸 뒤 연소하기 쉬운 칩 형태로 잘게 부순 목재재료이다. 톱밥은 목재를 톱으로 절단하거나 연마할 ‹š 발생하는 목재 가루이다. 폐목재는 목재를 가공하면서 남은 짜투리 목재로서 더 이상이 활용이 어려운 목재를 지칭한다.The woody raw material preparing step S20 is a step of preparing the woody raw material 4 containing at least one of wood chips, sawdust, and waste wood. Wood chips are wood materials that are broken into chips that are easy to burn after separating roots, branches and other wood waste that can not be used as building timbers. Sawdust is a wood flour that occurs when cutting or grinding wood with a saw. Waste wood is a remnant of wood that is left untreated as it is processed.

슬러지저장단계(S50)는 하수 슬러지(2)를 이송컨베이어(6)로 이송하여 제1호퍼(30)에 저장하는 단계이다.The sludge storing step S50 is a step of transferring the sewage sludge 2 to the conveying conveyor 6 and storing the same in the first hopper 30. [

제1호퍼(30)는 이송컨베이어(6)에 안치되어 이송되는 하수 슬러지(2)가 상측으로 유입된 후 일시 저장된다. 여기서, 이송컨베이어(6)는 무한궤도방식의 벨트 컨베이어어를 적용하도록 한다.The first hopper 30 is stored temporarily after the sewage sludge 2 fed into the feeding conveyor 6 is fed to the upper side. Here, the conveying conveyor 6 applies an endless track type belt conveyor.

목질원료저장단계(S60)는 목질원료(4)를 이송컨베이어(8)로 이송하여 제2호퍼(40)에 저장하는 단계이다. The woody raw material storing step S60 is a step of transferring the woody raw material 4 to the conveying conveyor 8 and storing it in the second hopper 40. [

제2호퍼(40)는 이송컨베이어(8)에 안치되어 이송되는 목질원료(4)가 상측으로 유입된 후 일시 저장된다. 여기서, 이송컨베이어(8)는 무한궤도방식의 벨트 컨베이어어를 적용하도록 한다.The second hopper 40 is temporarily stored after the woody raw material 4 transported in the conveying conveyor 8 flows upward. Here, the conveying conveyor 8 is adapted to apply an endless track type belt conveyor.

제1호퍼(30)와 제2호퍼(40)는 비례제어부(45)가 상호 연결되어 제1호퍼(30)에서 배출되는 하수 슬러지(2)의 량과 제2호퍼(40)에서 배출되는 목질원료(4)의 량을 상호 비교하여 적절한 비율 만큼 배출하도록 제어한다.The first hopper 30 and the second hopper 40 are connected to each other by a proportional control unit 45 so that the amount of the sewage sludge 2 discharged from the first hopper 30 and the amount of the lignocellulosic material discharged from the second hopper 40 The amounts of the raw materials 4 are compared with each other and controlled to be discharged at an appropriate ratio.

비례제어부(45)는 제1호퍼(30)에서 배출되는 하수 슬러지(2) 량과, 제2호퍼(40)에서 배출되는 목질원료(4) 량을 상호 컨트롤하여 배합물이 하수 슬러지(2) 30~50 중량%와, 목질원료(4) 50~70 중량%의 혼합비율을 가질 수 있도록 배출량을 비례 제어하도록 한다.The proportional control unit 45 controls mutually the amount of the sewage sludge 2 discharged from the first hopper 30 and the amount of the woody raw material 4 discharged from the second hopper 40 so that the blend is discharged from the sewage sludge 2 To 50% by weight of the woody raw material (4) and 50 to 70% by weight of the woody raw material (4).

슬러지저장단계(S50)에서 하수 슬러지(2)를 이송컨베이어(6)로 이송하면서 하수 슬러지(2)에서 발생하는 악취를 포집유닛(10)으로 포집하여 제거하는 악취제거단계(S30)를 더 포함할 수 있다.Further includes a malodor removing step S30 for collecting and removing the odor generated in the sewage sludge 2 by the collecting unit 10 while transferring the sewage sludge 2 to the conveying conveyor 6 in the sludge storing step S50 can do.

포집유닛(10)은 이송컨베이어(6) 상에 설정 간격 이격되도록 배치되어 이송컨베이어(6) 상에 안치되어 이송하는 하수 슬러지(2)에서 발생하는 악취가스를 흡입하여 제거하는 장치이다.The collecting unit 10 is disposed on the conveying conveyor 6 so as to be spaced apart from the conveying conveyor 6 and sucks and removes odorous gas generated in the conveying sewer sludge 2 placed on the conveying conveyor 6.

포집유닛(10)은 천장에 설치되는 흡기덕트부(12)와, 흡기덕트부(12)에 연결되어 악취 공기를 흡입하도록 강제 흡입력을 제공하는 악취공기흡입부(14)를 포함한다.The collecting unit 10 includes an intake duct portion 12 provided on a ceiling and an odor air intake portion 14 connected to the intake duct portion 12 to provide a forced suction force to suck odorous air.

흡기덕트부(12)는 이송컨베이어(6) 상의 전 구간에서 설정 구간마다 다수개가 각각 배치되어 상호 연결됨으로써, 악취가스가 함유된 공기를 넓은 범위에서 흡입하도록 구성될 수 있다.A plurality of intake duct portions 12 are arranged and connected to each other in the entire section of the conveying conveyor 6 for each setting interval so that the intake duct portion 12 can be configured to suck in air containing odorous gas over a wide range.

악취공기흡입부(14)는 고출력의 공기흡입팬 또는 공기흡입펌프를 적용할 수 있다.The malodor air suction unit 14 may be a high-output air suction fan or an air suction pump.

목질원료저장단계(S60)에서 목질원료(4)를 이송컨베이어(8)로 이송하면서 목질원료(4)에 포함된 금속재를 자력선별기(20)의 자력으로 부착하여 제거하는 금속제거단계(S40)를 더 포함할 수 있다.A metal removing step S40 of attaching and removing the metal material contained in the woody raw material 4 by the magnetic force of the magnetic separator 20 while transferring the woody raw material 4 to the conveying conveyor 8 in the woody raw material storing step S60; As shown in FIG.

자력선별기(20)는 이송컨베이어(8)를 가로 질러 상측에 설정 간격을 갖도록 배치되어 이송컨베이어(8) 상에 안치되어 이송되는 목질원료(4)에 함유된 금속재를 자력으로 부착하여 제거한다. 자력선별기(20)는 전자석 또는 영구자석을 적용할 수 있다.The magnetic force sorter 20 is disposed across the conveying conveyor 8 so as to have a predetermined gap therebetween and is attached to the conveying conveyor 8 and removes the metallic material contained in the wood raw material 4 by magnetic force. The magnetic separator 20 may be an electromagnet or a permanent magnet.

이 ‹š, 자력선별기(20)의 자력봉에 묻은 금속재는 미세한 가루 형태의 금속재로서, 일정시간 사용한 후, 작업자가 손으로 털어서 제거하거나 전기 공급을 일시 중단하여 자력을 없앤 다음 제거할 수도 있다.The metallic material adhered to the magnetic bar of the magnetic separator 20 is a fine metal powder, and after being used for a certain period of time, the worker may shake it off by hand or temporarily stop the electricity supply to remove the magnetic force.

배합물혼합단계(S70)는 제1호퍼(30)의 하수 슬러지(2)와 제2호퍼(40)의 목질원료(4)를 이송컨베이어(50)로 이송하여 혼합기(80)에서 혼합하여 배합물을 만드는 단계이다.The compounding mixing step S70 is a step in which the sewage sludge 2 of the first hopper 30 and the woody raw material 4 of the second hopper 40 are conveyed to the conveying conveyor 50 and mixed in the mixer 80, It is a step to make.

이송컨베이어(50)는 경사지게 배치되는 스크류 컨베이어를 적용하도록 한다. 물론, 이송컨베이어(50)는 벨트 컨베이어를 적용할 수도 있다. 이송컨베이어(50)는 혼합기(80)로 유입하기 위한 배출 측의 높이가 높고, 제1,제2호퍼(30,40)에 연결된 유입측이 높이가 낮도록 경사지게 배치될 수 있다.The conveying conveyor 50 is adapted to apply an inclined screw conveyor. Of course, the conveying conveyor 50 may also apply a belt conveyor. The conveying conveyor 50 may be disposed at an inclined height so that the inlet side connected to the first and second hoppers 30 and 40 has a high height at the discharge side for entering the mixer 80.

배합물은 혼합기(80)에 의해 성분이 골고루 섞이도록 한다.The compounding is such that the ingredients are evenly mixed by the mixer (80).

혼합기(80)는 패들믹서기(paddle mixer)를 포함한다.The mixer 80 includes a paddle mixer.

패들믹서기는 500~660rpm/min의 회전속도로 회전하는 것이 바람직하다. 패들믹서기는 길이가 긴 원통 내에 패들 회전축이 구비되고, 이 회전축을 외부로 연결하여 벨트, 체인 또는 기어 중 어느 하나의 동력전달수단을 통하여 구동모터의 회전 구동력이 전달된다.The paddle mixer is preferably rotated at a rotating speed of 500 to 660 rpm / min. The paddle mixer is provided with a paddle rotating shaft in a long cylindrical body, and the rotary driving force of the driving motor is transmitted through the power transmitting means of the belt, the chain or the gear by connecting the rotating shaft to the outside.

배합물은 하수 슬러지(2) 30~50 중량%와, 목질원료(4) 50~70 중량%의 혼합비율로 이루어지는 것이 바람직하다. It is preferable that the blend is composed of 30 to 50% by weight of the sewage sludge (2) and 50 to 70% by weight of the woody raw material (4).

특히, 배합물은 하수 슬러지(2) 35~45 중량%와, 목질원료(4) 55~65 중량%의 혼합비율로 이루어지는 것이 가장 좋다.Particularly, it is best that the blend is composed of 35 to 45% by weight of the sewage sludge (2) and 55 to 65% by weight of the woody raw material (4).

하수 슬러지(2)가 30 중량% 이하로 혼합되는 경우 하수 슬러지(2) 재활용 목적에 부합하지 않으며, 목질원료(4)와의 응집력이 저하되어 고체화가 어려울 수 있다.When the sewage sludge 2 is mixed in an amount of 30% by weight or less, it does not meet the purpose of recycling the sewage sludge 2, and the cohesive force with the woody raw material 4 is lowered and solidification may be difficult.

펠릿건조성형단계(S80)는 배합물을 이송컨베이어(90)로 이송하여 가공시 발생하는 압축열 및 마찰열을 이용하여 건조하면서 성형하여 슬러지펠릿을 제조하는 단계이다.The pellet drying forming step (S80) is a step of transferring the compound to the conveying conveyor (90), and drying and forming the sludge pellets by using the heat of compression and frictional heat generated during processing.

펠릿건조성형단계(S100)는 제1펠릿건조성형단계(S110) 및 제2펠릿건조성형단계(S120)를 포함한다. The pellet drying forming step (S100) includes a first pellet drying forming step (S110) and a second pellet drying forming step (S120).

제1펠릿건조성형단계(S100)는 배합물을 이송하고 제1성형기(100)에 투입하여 압축 과정을 통해 발생하는 100~130℃ 온도범위의 압축열과 마찰열을 이용하여 슬러지펠릿을 1차 건조 성형하는 단계이다.The first pellet drying forming step S100 is a step of performing primary drying molding of the sludge pellets by using the compression heat and the frictional heat in the temperature range of 100 to 130 DEG C which is generated through the compression process by transferring the compound and putting it into the first molding machine 100 .

제2펠릿건조성형단계(S120)는 제1성형기(100)에 의해 건조 성형된 슬러지펠릿을 이송하고 제2성형기(110)에 투입하여 압축 과정을 통해 발생하는 130~160℃ 온도범위의 압축열과 마찰열을 이용하여 슬러지펠릿을 2차 건조 성형하는 단계이다.In the second pellet drying forming step S120, the sludge pellets that have been dry-molded by the first molding machine 100 are transferred to the second molding machine 110, and the compression heat of 130 to 160 deg. And secondarily drying and molding the sludge pellets using frictional heat.

배합물혼합단계(S70)와 제1펠릿건조성형단계(S110) 사이에 목질원료(4)에서 미처 제거되지 못한 금속재를 배합물에서 자력선별기(70)를 이용하여 추가적으로 제거하는 추가금속제거단계(S80)를 더 포함할 수 있다.A further metal removal step (S80) for additionally removing the metal material not removed from the woody raw material (4) by using the magnetic separator (70) between the compounding mixing step (S70) and the first pellet drying forming step (S110) As shown in FIG.

자력선별기(70)는 이송컨베이어(90)를 가로 질러 상측에 설정 간격을 갖도록 배치되어 이송컨베이어(90) 상에 안치되어 이송되는 배함물에 함유된 금속재를 자력으로 부착하여 제거한다. 자력선별기(70)는 전자석 또는 영구자석을 적용할 수 있다.The magnetic force sorter 70 is arranged across the conveying conveyor 90 with a predetermined gap therebetween and is placed on the conveying conveyor 90 to magnetically attach and remove the metallic material contained in the conveyed material. The magnetic separator 70 may be an electromagnet or a permanent magnet.

이 ‹š, 자력선별기(70)의 자력봉에 묻은 금속재는 미세한 가루 형태의 금속재로서, 일정시간 사용한 후, 작업자가 손으로 털어서 제거하거나 전기 공급을 일시 중단하여 자력을 없앤 다음 제거할 수도 있다.The metallic material adhered to the magnetic bar of the magnetic separator 70 is a fine metal powder, and after being used for a predetermined period of time, the worker may shake it off by hand or temporarily stop the electricity supply to remove the magnetic force.

배합물혼합단계(S70)와 제1펠릿건조성형단계(S110) 사이에 하수 슬러지(2)에서 미처 제거하지 못한 슬러지 악취를 배합물에서 포집유닛(60)을 이용하여 추가적으로 제거하는 추가악취제거단계(S90)를 더 포함할 수 있다.(Step S90) in which the sludge odor which has not been removed from the sewage sludge 2 is additionally removed using the collection unit 60 in the formulation between the compounding step (S70) and the first pellet drying step (S110) ).

포집유닛(60)은 이송컨베이어(90) 상에 설정 간격 이격되도록 배치되어 이송컨베이어(90) 상에 안치되어 이송하는 배합물에 포함되어 미처 제거되지 못한 하수 슬러지(2)에서 발생하는 악취가스를 흡입하여 제거하는 장치이다.The collecting unit 60 is disposed on the conveying conveyor 90 so as to be spaced apart from the conveying conveyor 90 so as to be sucked from the sewage sludge 2 contained in the conveying material conveyed on the conveying conveyor 90, .

포집유닛(60)은 천장에 설치되는 흡기덕트부(62)와, 흡기덕트부(62)에 연결되어 악취 공기를 흡입하도록 강제 흡입력을 제공하는 악취공기흡입부(64)를 포함한다.The collecting unit 60 includes an intake duct portion 62 provided on the ceiling and an odor air intake portion 64 connected to the intake duct portion 62 to provide a forced suction force to suck the malodor air.

흡기덕트부(62)는 이송컨베이어(90) 상의 전 구간에서 설정 구간마다 다수개가 각각 배치되어 상호 연결됨으로써, 악취가스가 함유된 공기를 넓은 범위에서 흡입하도록 구성될 수 있다.A plurality of the intake duct portions 62 are arranged and connected to each other in the entire section on the conveying conveyor 90 for each setting interval, so that the intake duct portion 62 can be configured to suck the air containing odorous gas in a wide range.

악취공기흡입부(64)는 고출력의 공기흡입팬 또는 공기흡입펌프를 적용할 수도 있다.The malodor air suction unit 64 may be a high-output air suction fan or an air suction pump.

한편, 제2성형기(110)에서 배출되는 슬러지펠릿은 수분함량이 연소에 적합하돌고 8~16중량%을 갖도록 건조하는 것이 바람직하다.On the other hand, it is preferable that the sludge pellets discharged from the second molding machine 110 are dried so that the moisture content of the sludge pellets is suitable for combustion and has 8 to 16% by weight.

제2성형기(110)에서 배출된 슬러지펠릿은 이송컨베이어(120)에 안차되어 이송된 후, 슬러지펠릭 저장부에 저장하도록 한다.The sludge pellets discharged from the second molding machine 110 are transported to the conveying conveyor 120 and stored in the sludge pellet storage unit.

제1성형기(100)는 115~125rpm/min의 회전속도로 회전하는 것이 바람직하다.The first molding machine 100 is preferably rotated at a rotating speed of 115 to 125 rpm / min.

제2성형기(110)는 160~180rpm/min의 회전속도로 회전하는 것이 바람직하다.The second molding machine 110 is preferably rotated at a rotation speed of 160 to 180 rpm / min.

제2성형기(110)의 회전속도를 제1성형기(100)의 회전속도보다 큰 이유는 슬러지펠릿을 더 건조하고, 응집하기 위함이다.The reason why the rotating speed of the second molding machine 110 is larger than the rotating speed of the first molding machine 100 is to further dry and coagulate the sludge pellets.

본 발명의 일 실시예에 따른 하수 슬러지를 이용한 펠릿제조방법은, 하수 슬러지와 우드칩, 폐목재, 톱밥을 포함한 목질재료를 설정 비율로 혼합하여 배합물을 만든 후, 컨베이어로 이송하여 제1,제2성형기를 각각 거치면서 제1,제2성형기의 마찰열과 압축열을 이용하여 슬러지펠릿을 건조할 수 있고, 버려지는 하수 슬러지를 활용하여 슬러지펠릿을 제조하므로 제조비용을 절감할 수 있다. A method for producing pellets using sewage sludge according to an embodiment of the present invention comprises mixing woody materials including sewage sludge, wood chip, waste wood and sawdust at a set ratio to form a blend, The sludge pellets can be dried by using the frictional heat and the compression heat of the first and second molding machines, respectively, while the sludge pellets are produced by using the sludge discharged.

또한, 본 발명은, 제1,제2성형기의 마찰열과 압축열을 이용하여 슬러지펠릿을 자동 건조하므로 기존에 사용되던 열풍건조장치를 삭제할 수 있어 설비의 설치공간을 줄일 수 있다.In addition, since the sludge pellet is automatically dried by using the frictional heat and the compressed heat of the first and second molding machines, the hot air drying apparatus which has been used in the past can be eliminated, thereby reducing installation space of the facility.

본 발명은 도면에 도시된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

따라서, 본 발명의 진정한 기술적 보호범위는 아래의 특허청구범위에 의해서 정하여져야 할 것이다.Accordingly, the true scope of protection of the present invention should be defined by the following claims.

10 : 포집유닛 12 : 흡기덕트부
14 : 악취공기흡입부 20 : 자력선별기
30 : 제1호퍼 40 : 제2호퍼
50 : 이송컨베이어 60 : 포집유닛
62 : 흡기덕트부 64 : 악취공기흡입부
70 : 자력선별기 80 : 혼합기
90 : 이송컨베이어 100 : 제1성형기 :
110 : 제2성형기 120 : 이송컨베이어
10: collection unit 12: intake duct part
14: odor air suction part 20: magnetic separator
30: first hopper 40: second hopper
50: conveying conveyor 60: collecting unit
62: intake duct part 64: odor air intake part
70: magnetic force selector 80: mixer
90: conveying conveyor 100: first molding machine:
110: second molding machine 120: conveying conveyor

Claims (10)

하수 슬러지를 준비하는 슬러지준비단계;
우드칩, 톱밥, 폐목재 중 적어도 어느 하나를 포함한 목질원료를 준비하는 목질원료준비단계;
상기 하수 슬러지를 이송하여 제1호퍼에 저장하는 슬러지저장단계;
상기 목질원료를 이송하여 제2호퍼에 저장하는 목질원료저장단계;
상기 제1호퍼의 하수 슬러지와 상기 제2호퍼의 목질원료를 이송컨베이어로 이송하여 혼합기에서 혼합하여 배합물을 만드는 혼합단계; 및
상기 배합물을 이송컨베이어로 이송하여 가공시 발생하는 압축열 및 마찰열을 이용하여 건조하면서 성형하여 슬러지펠릿을 제조하는 펠릿건조성형단계;를 포함하고,
상기 슬러지저장단계에서 상기 하수 슬러지를 이송컨베이어로 이송하면서 상기 하수 슬러지에서 발생하는 악취를 포집유닛으로 포집하여 제거하는 악취제거단계;를 더 포함하며,
상기 목질원료저장단계에서 상기 목질원료를 이송컨베이어로 이송하면서 상기 목질원료에 포함된 금속재를 자력선별기의 자력으로 부착하여 제거하는 금속제거단계;를 더 포함하고,
상기 배합물은 상기 하수 슬러지 30~50 중량%와, 상기 목질원료 50~70 중량%의 혼합비율로 이루어지며,
상기 제1호퍼와 상기 제2호퍼는 비례제어부에 의해 상호 연결되고,
상기 비례제어부는 상기 제1호퍼에서 배출되는 하수 슬러지의 량과, 상기 제2호퍼에서 배출되는 목질원료의 량을 상호 컨트롤하여 배합물이 하수 슬러지 30~50 중량%와, 목질원료 50~70 중량%의 혼합비율을 가질 수 있도록 배출량을 비례 제어하고,
상기 펠릿건조성형단계는,
상기 배합물을 이송하고 제1성형기에 투입하여 압축 과정을 통해 발생하는 100~130℃ 온도범위의 압축열과 마찰열을 이용하여 슬러지펠릿을 1차 건조 성형하는 제1펠릿건조성형단계; 및
상기 제1성형기에 의해 1차 건조 성형된 슬러지펠릿을 이송하고 제2성형기에 투입하여 압축 과정을 통해 발생하는 130~160℃ 온도범위의 압축열과 마찰열을 이용하여 슬러지펠릿을 2차 건조 성형하는 제2펠릿건조성형단계;를 포함하며,
상기 배합물혼합단계와 상기 제1펠릿건조성형단계 사이에 상기 목질원료에서 미처 제거되지 못한 금속재를 상기 배합물에서 자력선별기를 이용하여 추가적으로 제거하는 추가금속제거단계를 더 포함하며,
상기 배합물혼합단계와 상기 제1펠릿건조성형단계 사이에 상기 하수 슬러지에서 미처 제거하지 못한 슬러지 악취를 상기 배합물에서 포집유닛을 이용하여 추가적으로 제거하는 추가악취제거단계를 더 포함하며,
상기 포집유닛은,
천장에 설치되는 흡기덕트부; 및
상기 흡기덕트부에 연결되어 악취 공기를 흡입하도록 흡입력을 제공하는 악취공기흡입부;를 포함하고,
상기 혼합기는 패들믹서기를 포함하고,
상기 패들믹서기는 500~660rpm/min의 회전속도로 회전하며,
상기 제1성형기는 115~125rpm/min의 회전속도로 회전하고,
상기 제2성형기는 160~180rpm/min의 회전속도로 회전하고,
상기 흡기덕트부는 상기 이송컨베이어 상의 전 구간에서 설정 구간마다 다수개가 각각 배치되어 상호 연결됨으로써, 악취가스가 함유된 공기를 넓은 범위에서 흡입하는 것을 특징으로 하는 하수 슬러지를 이용한 펠릿제조방법.
A sludge preparation step for preparing sewage sludge;
A woody raw material preparation step of preparing a woody raw material including at least one of wood chips, sawdust, and waste wood;
A sludge storage step of transferring the sewage sludge to the first hopper;
A woody raw material storing step of transferring the woody raw material and storing it in a second hopper;
Transferring the sewage sludge of the first hopper and the woody raw material of the second hopper to a conveying conveyor and mixing them in a mixer to form a blend; And
And a pellet drying and molding step of transferring the above-mentioned blend to a conveying conveyor, and drying and molding the pellet using the heat of compression and frictional heat generated during processing, thereby forming a sludge pellet,
Removing the odor generated in the sewage sludge by the collecting unit and removing the odor generated in the sewage sludge while the sewage sludge is transferred to the conveying conveyor in the sludge storing step,
And a metal removing step of removing the metal material contained in the wood material by the magnetic force of the magnetic separator while transferring the wood material to the transfer conveyor in the wood material storing step,
Wherein the blend comprises 30 to 50% by weight of the sewage sludge and 50 to 70% by weight of the woody raw material,
Wherein the first hopper and the second hopper are interconnected by a proportional control section,
The proportional control unit may control the amount of sewage sludge discharged from the first hopper and the amount of the woody raw material discharged from the second hopper such that the mixture contains 30 to 50 wt% of sewage sludge, 50 to 70 wt% The proportion of the emission amount is controlled so as to have a mixing ratio of "
The pellet drying and forming step may comprise:
A first pellet drying molding step of carrying out primary drying and molding of the sludge pellets by using compressed heat and frictional heat in a temperature range of 100 to 130 ° C, And
A sludge pellet is firstly dried and molded by the first molding machine, and the sludge pellet is subjected to secondary drying and molding using compression heat and frictional heat in a temperature range of 130 to 160 ° C, 2 pellet drying forming step,
Further comprising a further metal removal step between the mixture blending step and the first pellet drying and forming step, wherein the metal material that has not been removed from the woody raw material is further removed using a magnetic separator in the blend,
Further comprising a further odor eliminating step of additionally removing sludge odor which has not been removed from the sewage sludge between the compounding mixing step and the first pellet drying forming step using a collecting unit in the formulation,
The collecting unit includes:
An intake duct part installed on the ceiling; And
And an odor air intake part connected to the intake duct part to provide a suction force to suck odor air,
Wherein the mixer comprises a paddle mixer,
The paddle mixer is rotated at a rotation speed of 500 to 660 rpm / min,
The first molding machine rotates at a rotating speed of 115 to 125 rpm / min,
The second molding machine is rotated at a rotation speed of 160 to 180 rpm / min,
Wherein a plurality of the intake duct portions are connected to each other and connected to each other in every interval on the conveying conveyor, so that the air containing the odorous gas is sucked in a wide range.
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KR102014980B1 (en) * 2019-04-04 2019-08-27 (주)엔키이앤씨 A manufacturing method for solid refuse fuel comprising wastewater sludge
KR102037447B1 (en) * 2019-07-24 2019-10-31 (주)스데코 manufacturing system of refuse derived fuel using sewage sludge
KR102069317B1 (en) * 2018-10-02 2020-01-22 주식회사 이열알앤디 Sludge fueling system
CZ308586B6 (en) * 2018-12-31 2020-12-16 Výzkumný ústav zemědělské techniky, v. v. i. Fertilizer based on sludge from wastewater treatment plants and producing it
KR102284184B1 (en) 2020-12-30 2021-07-30 장우기계 주식회사 Dry product moisture content selection discharge system of disk dryer
KR102285822B1 (en) 2021-06-08 2021-08-04 송진옥 Sewage Sludge Fuel Manufacturing Apparatus with Reduced Malodor
KR102354455B1 (en) * 2020-11-02 2022-01-24 (주)진에너텍 Method for producing pellets for fuel using mushroom waste media
KR102354445B1 (en) 2020-10-14 2022-01-25 (주)진에너텍 Sludge coal production device using waste mushroom medium and bagasse
KR102354443B1 (en) 2020-10-14 2022-01-25 (주)진에너텍 Sludge coal production device using waste mushroom medium and rice husk
KR102354457B1 (en) 2020-10-14 2022-01-25 (주)진에너텍 Manufacturing method of sludge fuel coal using waste mushroom medium and rice husk
KR102365646B1 (en) 2020-10-14 2022-02-23 (주)진에너텍 Manufacturing method of sludge fuel coal using waste mushroom medium and bagasse
KR20230065609A (en) 2021-11-05 2023-05-12 (주)드림엔지니어링 System for producing sludge pellets with moisture content control
KR102534489B1 (en) 2022-07-06 2023-05-26 (주)드림엔지니어링 System for producting sludge pellets with mixing function
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KR100469171B1 (en) * 2004-01-19 2005-01-29 박경득 Recycling method for Sewage

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KR100469171B1 (en) * 2004-01-19 2005-01-29 박경득 Recycling method for Sewage

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KR102069317B1 (en) * 2018-10-02 2020-01-22 주식회사 이열알앤디 Sludge fueling system
CZ308586B6 (en) * 2018-12-31 2020-12-16 Výzkumný ústav zemědělské techniky, v. v. i. Fertilizer based on sludge from wastewater treatment plants and producing it
KR102014980B1 (en) * 2019-04-04 2019-08-27 (주)엔키이앤씨 A manufacturing method for solid refuse fuel comprising wastewater sludge
KR102037447B1 (en) * 2019-07-24 2019-10-31 (주)스데코 manufacturing system of refuse derived fuel using sewage sludge
KR102354457B1 (en) 2020-10-14 2022-01-25 (주)진에너텍 Manufacturing method of sludge fuel coal using waste mushroom medium and rice husk
KR102354445B1 (en) 2020-10-14 2022-01-25 (주)진에너텍 Sludge coal production device using waste mushroom medium and bagasse
KR102354443B1 (en) 2020-10-14 2022-01-25 (주)진에너텍 Sludge coal production device using waste mushroom medium and rice husk
KR102365646B1 (en) 2020-10-14 2022-02-23 (주)진에너텍 Manufacturing method of sludge fuel coal using waste mushroom medium and bagasse
KR102354455B1 (en) * 2020-11-02 2022-01-24 (주)진에너텍 Method for producing pellets for fuel using mushroom waste media
KR102284184B1 (en) 2020-12-30 2021-07-30 장우기계 주식회사 Dry product moisture content selection discharge system of disk dryer
KR102285822B1 (en) 2021-06-08 2021-08-04 송진옥 Sewage Sludge Fuel Manufacturing Apparatus with Reduced Malodor
KR20230065609A (en) 2021-11-05 2023-05-12 (주)드림엔지니어링 System for producing sludge pellets with moisture content control
KR102585072B1 (en) 2021-11-05 2023-10-06 (주)드림엔지니어링 System for producing sludge pellets with moisture content control
KR102534489B1 (en) 2022-07-06 2023-05-26 (주)드림엔지니어링 System for producting sludge pellets with mixing function
KR20240022870A (en) 2022-08-12 2024-02-20 (주)이엠씨 Pellets producting system using dried sludge

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