KR20100135339A - Swirled heating air using heat air injection rotary kiln dryer - Google Patents

Swirled heating air using heat air injection rotary kiln dryer Download PDF

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KR20100135339A
KR20100135339A KR1020090053647A KR20090053647A KR20100135339A KR 20100135339 A KR20100135339 A KR 20100135339A KR 1020090053647 A KR1020090053647 A KR 1020090053647A KR 20090053647 A KR20090053647 A KR 20090053647A KR 20100135339 A KR20100135339 A KR 20100135339A
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sludge
hot air
dryer
drying
hot
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KR1020090053647A
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Korean (ko)
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김정희
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김정희
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    • 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
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • 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
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/28—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/02—Odour removal or prevention of malodour
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Analytical Chemistry (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PURPOSE: A swirled heating air using a heat air injection rotary kiln dryer is provided to change the sludge having high water content into the sludge having low water content. CONSTITUTION: A drying unit(20) dries sludge, and a cyclone dust collector(30) collects the dried sludge. The hot wind required for drying is classified into the primary and secondary hot winds of a hot wind generator(50). The hot wind is sprayed to the inside of the drier. An impeller(21) is installed at the inside of the drier, and moves the sludge to the center of the drier.

Description

선회열풍을 이용한 열풍분사형 회전건조기 {Swirled Heating Air Using Heat Air Injection Rotary Kiln Dryer}{Swirled Heating Air Using Heat Air Injection Rotary Kiln Dryer}

본 기술은 슬러지를 빠른 시간내에 건조가 하기 위하여 선회하는 고온공기를 건조실의 벽면을 따라 선회시켜 열풍체류시간 늘리고, 구동모타에 의하여 건조기 회전드럼이 회전하여 슬러지의 혼합을 용이하게 하고, 건조기내부의 임펠라를 설치하여 슬러지교반을 극대화하여 건조가 이루어지게 한다. In this technology, the hot air is turned along the wall of the drying room to increase the hot air residence time by drying the sludge to quickly dry the sludge, and the rotating drum of the dryer is rotated by the driving motor to facilitate the mixing of the sludge. Impellers are installed to maximize the sludge agitation to allow drying.

또한 계절별, 배출공정마다 다른 성상의 슬러지에 대하여 건조실의 회전수 와 선회열풍공기의 양을 조절하여 원하는 함수량의 건조슬러지를 얻을 수 있다.In addition, it is possible to obtain the desired water content of the dry sludge by adjusting the number of revolutions of the drying chamber and the amount of swirling hot air for the sludges of different characteristics according to season and discharge process.

본 발명은 수분함량이 높은 슬러지를 비교적 간단하게 건조시키는 장치로써 열풍발생장치의 고온의 열풍을 노즐을 통하여 고속으로 분사하여 건조시키는 장치로 슬러지의 엉킴방지 및 재 응집에 대비 할 수 있으며 고온의 열풍에 의한 건조효율이 높힐 수 있다.The present invention is a device for drying the sludge with a high moisture content relatively simply as a device for spraying and drying the hot air of the hot air generator at high speed through the nozzle to prevent sludge tangling and re-aggregation of hot sludge. Drying efficiency can be increased by.

본 발명은 기존의 건조기에 비해 보조연료의 사용을 억제 할 수 있고 운영비 절감 및 안정적 건조가 이루어지도록 한 기술을 제공하기 위하여 안출한 것으로; 특히 열풍발생기의 열풍을 고속으로 선회분사하기 위한 노즐의 설치설계와 슬러지의 투입량 및 건조온도의 데이터를 수집하여 자동으로 유속을 제어함으로써 운전의 효율성을 높히고 불규칙하게 배출되는 슬러지 수분에 대응하여 균일한 건조슬러지의 생산을 할 수 있는 시스템이다.The present invention has been made to provide a technology that can suppress the use of auxiliary fuel compared to the conventional dryer, and to reduce the operating costs and achieve stable drying; In particular, the installation design of the nozzle to spin the hot air of the hot wind generator at high speed and the sludge input and drying temperature data are automatically collected to control the flow rate to increase the efficiency of operation and to uniformly respond to the irregularly discharged sludge moisture. It is a system that can produce dry sludge.

또한 고온으로 노즐을 통하여 선회분사되는 열풍에 의해 1차 해쇄하기 때문에 엉킴현상을 제거해줌으로써 건조기내에 슬러지가 쌓여 압력손실 증가현상을 예방할 수 있다.In addition, since the primary disintegration by hot air swirling through the nozzle at a high temperature eliminates entanglement, sludge builds up in the dryer to prevent an increase in pressure loss.

슬러지를 건조하는 회전건조기의 건조설비에 있어서,In the drying equipment of the rotary dryer for drying the sludge,

건조 후 비산되는 건조슬러지는 싸이클론집진기에서 포집하는 것이 바람직하다.Dry sludge which is scattered after drying is preferably collected in a cyclone dust collector.

포집된 건조슬러지는 건조기 투입전의 슬러지와 혼합하여 수분을 50%내외로 조정하여 초기의 건조기 입구에서의 엉킴과 늘어 붙는 것을 방지하는 것이 바람직하다.The collected dry sludge is mixed with the sludge prior to the drier input to adjust the water to about 50% to prevent entanglement and seizure at the initial dryer inlet.

또한 건조에 필요한 열풍은 열풍발생기에서의 열풍을 건조기벽면과 접선방향으로 설치된 2개 이상의 노즐을 통하여 열풍을 선회하여 슬러지와 열풍이 혼합하는 시간을 늘림으로 짧은 통과길이를 가능하게 하였다.In addition, the hot air required for drying enables a short passage length by increasing the time for mixing the hot air from the hot air generator through two or more nozzles installed in a tangential direction with the dryer wall to increase the time for mixing the sludge and the hot air.

건조실 내부로 선회를 하는 열풍에 의하여 건조기 중심으로 편증 되는 현상은 임펠라와 리프터에 의하여 교반을 하여 뭉치는 현상을 방지 하는 것이 바람직하다.  It is preferable that the phenomenon of eccentricity to the center of the dryer due to the hot air turning into the drying chamber is prevented from being agglomerated by stirring by the impeller and the lifter.

본 발명으로 고함수의 슬러지(함수율이 70∼85%)를 건조된 슬러지를 건조하는 방법으로 슬러지공급부(10)를 통하여 정량공급장치와 건조된 슬러지가 혼합되어 함수율 50~60%로 조정되어지며 회전건조드럼(20)의 내부로 장입된다.In the present invention, the sludge supply (high water content is 70 ~ 85%) of the dried sludge by the method of drying the sludge supply unit through the sludge supply unit 10 and the dried sludge is mixed to adjust the water content 50 ~ 60% It is charged into the rotary drying drum 20.

이때 열풍발생기에서 발생된 열풍 중 1차 열풍(52)을 슬러지 투입구(10)와 근접하게 설치하여 1차 열풍(52)에 의하여 슬러지를 해쇄하면서 건조기 내부로 장입된다.At this time, the primary hot air 52 of the hot air generated by the hot air generator is installed in close proximity to the sludge inlet 10 and is charged into the dryer while crushing the sludge by the primary hot air 52.

2차 열풍은 열풍공급부(11)를 통하여 회전건조드럼(20)의 건조실 벽면에 접선방향으로 2차 분사노즐(55)을 2개 이상 설치하여 공기를 선회(40)하여 슬러지를 건조하게 된다. Secondary hot air is installed on the wall of the drying chamber 20 of the rotary drying drum 20 in a tangential direction through the hot air supply unit 11 to turn the air 40 to dry the sludge.

회전건조드럼(20)의 내부 바깥에는 리프터(22)를 설치하여 건조시에 응집되거나 엉키는 현상을 방지하며 건조가 시작된 슬러지는 건조실 내부로 편중될 수 있기 때문에 임펠라(21)를 통하여 중심으로 이동하는 슬러지를 건조기 바깥으로 이동시켜 교반의 역할을 한다.Lifter 22 is installed inside and outside of the rotary drying drum 20 to prevent agglomeration or entanglement during drying, and since the sludge which has started to dry can be biased into the drying chamber, it moves to the center through the impeller 21. The sludge is moved out of the dryer to serve as agitation.

회전드럼은 구동모타(24)의 구동력에 의하여 5~10RPM으로 저속으로 회전하며 건조된 슬러지가 건조기의 바깥부분까지 밀려오면 포집호퍼(31)에서 포집되며 비산되는 건조슬러지는 싸이클론집진기(30)에서 99%이상 회수하여 대기로의 방출을 억제한다. Rotating drum is rotated at a low speed of 5 ~ 10RPM by the driving force of the drive motor 24 and when the dried sludge is pushed to the outside of the dryer is collected in the hopper 31 and the sludge dry sludge cyclone dust collector (30) To recover more than 99% of the emissions to the atmosphere.

이렇게 포집된 건조슬러지는 1차 슬러지와 혼합하기 하여 수분을 조절하는 수분조절보조제로 사용한다. Dry sludge collected in this way is mixed with primary sludge and used as a moisture control aid to control moisture.

사이클론집진기(30)에서 분리된 폐가스는 FAN를 통과 하여 대기로 방출된다.Waste gas separated from the cyclone dust collector 30 is discharged to the atmosphere through the FAN.

열풍발생장치(50)는 일반 고체연료, 액체연료, 기체 연료외 쓰레기를 태우는 소각로의 폐열을 이용할 수 있다.The hot air generator 50 may use waste heat from an incinerator for burning general solid fuel, liquid fuel, and gaseous fuel.

고온의 열풍과 건조기드럼 회전수를 변경하면 음식물과 축산폐수 등 모든 슬러지 건조기로 확대 적용할 수 있다.By changing the hot air wind and dryer drum speed, it can be extended to all sludge dryers such as food and livestock waste water.

본 발명은 함수율이 70∼85%의 높은 하수슬러지, 공단슬러지 및 축분슬러지를 비교적 안정적이고 균일한 수분을 지니는 건조슬러지를 만들어 낼 수 있고 고온으로 건조가 이루어지는 시스템으로 보조연료량이 적기 때문에 운영비를 절감할 수 있으며 건조시 건조기 벽면에 슬러지가 부착되는 등의 운전상 문제점을 해결할 수 있으며 슬러지의 체류시간을 단축시킴으로 악취 발생을 유발하는 유기물의 증발을 최대한 억제 할 수 있다. The present invention can produce a dry sludge having a relatively stable and uniform moisture of sewage sludge, satin sludge and blast furnace sludge having a high water content of 70 to 85%, and the operating cost is reduced because the amount of auxiliary fuel is small as the system is dried at high temperature. It can solve the operational problems such as sludge adhered to the wall of the dryer during drying, and it can suppress the evaporation of organic matter causing odor by reducing the sludge residence time.

특히 기존의 기류형건조기나 유동상건조기의 단점인 길이를 적게 하여 설치가 가능하고 분사노즐에 의해 슬러지가 쌓이는 현상을 없애기 때문에 압력손실이 적으므로 송풍기의 부하를 경감할 수 있는 특징과 건조기내에서의 건조된 슬러지의 유동이 기존의 제품에 비해 많으므로 건조기의 크기를 줄임으로 설치면적 및 초기투자비가 적게 소요되는 등의 현실에 적응이 가능한 발명이다.In particular, it is possible to install by reducing the length, which is a disadvantage of the existing airflow type dryer or the fluidized bed dryer, and because it eliminates the phenomenon of sludge accumulation by the injection nozzle, it can reduce the load of the blower because there is little pressure loss. Since the flow of dried sludge is more than that of the existing products, the invention is adaptable to the reality of reducing the size of the dryer and requiring less installation area and initial investment.

Claims (5)

슬러지를 건조하는 회전건조기에 있어서,In the rotary dryer for drying the sludge, 건조기를 통과하여 건조된 건조슬러지는 싸이클론집진기에서 포집하고,Dry sludge dried through the dryer is collected in a cyclone dust collector, 건조에 필요한 열풍은 열풍발생기에서의 1차 열풍과 2차 열풍으로 분리하여 건조기 내부로 분사하고,Hot air required for drying is separated into the primary hot air and the secondary hot air in the hot air generator and sprayed into the dryer. 건조기 내부에 임펠라가 설치되는 것을 특징으로 하는 선회열풍을 이용한 열풍분사형 회전건조기Hot air spray type rotary dryer using a rotating hot air, characterized in that the impeller is installed inside the dryer 제 1 항 있어서,The method of claim 1, 싸이클론집진기에서 포집된 건조슬러지는 건조기 투입전의 슬러지와 혼합하여 수분조정용으로 사용하는 것을 특징으로 하는 선회열풍을 이용한 열풍분사형 회전건조기Dry sludge collected in the cyclone dust collector is mixed with the sludge before entering the dryer and used for moisture control. 제 1 항 있어서,The method of claim 1, 열풍발생은 쓰레기 소각의 폐열을 이용하는 것을 특징으로 하는 선회열풍을 이용한 열풍분사형 회전건조기Hot air generation is a hot air spray type rotary dryer using a rotating hot air, characterized in that the waste heat of waste incineration 제 1 항 있어서,The method of claim 1, 건조기 내부로 분사되는 1차 열풍은 슬러지가 해쇄용으로 사용하며;Primary hot air sprayed into the dryer is used for sludge disintegration; 2차 열풍은 건조실 벽면과 접선방향으로 설치된 2개 이상의 분사노즐에 의하여 선회를 하면서 슬러지를 건조하는 것을 특징으로 하는 선회열풍을 이용한 열풍분사형 회전건조기The secondary hot air is a hot air spray type rotary dryer using a rotating hot wind, characterized in that the sludge is dried while turning by two or more spray nozzles installed in a tangential direction with the wall of the drying chamber. 제 1항에 있어서,The method of claim 1, 건조기 내부에 설치된 임펠라는 선회열풍과 함꼐 회오리를 이루며 슬러지를 건조하는 것을 특징으로 하는 선회열풍을 이용한 열풍분사형 회전건조기The impeller installed inside the dryer is a hot air spray type rotary dryer using the swirling hot wind, characterized in that the sludge is dried together with the swirling hot wind.
KR1020090053647A 2009-06-17 2009-06-17 Swirled heating air using heat air injection rotary kiln dryer KR20100135339A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103710481A (en) * 2013-12-03 2014-04-09 辽宁博联特冶金科技有限公司 Secondary radial wind supply device supplying hot wind for rotary kiln
KR20160120043A (en) 2015-04-07 2016-10-17 대화산기(주) Air inhaled-type dryer
CN109700052A (en) * 2019-01-29 2019-05-03 南通盟鼎新材料有限公司 A kind of track open type chamber typed drying-machine and its furnace drying method
CN110078348A (en) * 2019-04-28 2019-08-02 深圳瑞新达新能源科技有限公司 A kind of heat-pump dehumidification belt drying device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103710481A (en) * 2013-12-03 2014-04-09 辽宁博联特冶金科技有限公司 Secondary radial wind supply device supplying hot wind for rotary kiln
CN103710481B (en) * 2013-12-03 2015-10-21 辽宁博联特冶金科技有限公司 A kind ofly provide the secondary of hot blast radial air supply device for rotary kiln
KR20160120043A (en) 2015-04-07 2016-10-17 대화산기(주) Air inhaled-type dryer
CN109700052A (en) * 2019-01-29 2019-05-03 南通盟鼎新材料有限公司 A kind of track open type chamber typed drying-machine and its furnace drying method
CN110078348A (en) * 2019-04-28 2019-08-02 深圳瑞新达新能源科技有限公司 A kind of heat-pump dehumidification belt drying device

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