KR20010109933A - Sludge drier using wasting heat - Google Patents

Sludge drier using wasting heat Download PDF

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KR20010109933A
KR20010109933A KR1020000030729A KR20000030729A KR20010109933A KR 20010109933 A KR20010109933 A KR 20010109933A KR 1020000030729 A KR1020000030729 A KR 1020000030729A KR 20000030729 A KR20000030729 A KR 20000030729A KR 20010109933 A KR20010109933 A KR 20010109933A
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sludge
dryer
hot air
waste hot
stirring
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KR1020000030729A
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KR100380527B1 (en
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최완순
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최완순
자연과학산업(주)
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Abstract

횡형통기 교반 슬러지 건조장치에서 건조기 가열가마에서의 폐열풍을 슬러지 투입과 건조기내에서의 교반 이송에 효율화를 위해서 건조기 내로 투입하였고, 원통 건조기의 교반 이송 회전축을 중심부 아래로 위치하도록 하여서 건조기내의 수분배출과 슬러지와의 가열 접촉 극대화를 위하여 회전축에 마련한 열풍분출구로부터 폐열풍을 분출해서 건조기내의 무산소 분위기에서의 폐열풍을 이용하는 무산소슬러지 건조장치.In the horizontal aeration stirred sludge dryer, waste hot air from the dryer's heating kiln was introduced into the dryer for efficient sludge feeding and stirring transfer in the dryer, and water was discharged from the dryer by placing the stirring feed rotary shaft of the cylindrical dryer below the center. An oxygen-free sludge drying apparatus that uses waste hot air in an oxygen-free atmosphere in a dryer by blowing waste hot air from a hot air outlet provided on a rotating shaft to maximize heating contact with the sludge.

Description

폐열풍을 이용하는 무산소 슬러지 건조장치{Sludge drier using wasting heat}Oxygen Sludge Dryer Using Waste Hot Air {Sludge drier using wasting heat}

본 발명은 각종 슬러지의 횡형 통기 교반 건조장치에 관한 것이다.The present invention relates to a horizontal type aeration agitation drying apparatus for various sludges.

슬러지란 일반적으로 물리적 농축법으로서는 그 이상 농축 할 수 없는 것으로, 산업폐수 및 도시하수의 생물처리등에 의해서 생기는 유기질 슬러지가 중요한 것이나 대부분의 경우 산업계와 도시계의 슬러지는 분리할 수 가 없다.Sludge is generally unable to be concentrated by physical condensation, and organic sludge produced by industrial wastewater and municipal sewage is important, but in most cases industrial and urban sludge cannot be separated.

친수성 슬러지는 약 95∼98%의 함수율인 것도 있으므로 슬러지을 소각처리하거나 매립을 하더라도(소석회 또는 염화철을 가하여) 진공여과, 가압여과 등에 의해서 탈수한다. 탈수된 슬러지를 탈수케익이라하며 탈수케익의 함수율은 약 70∼75%이다.Since hydrophilic sludge has a water content of about 95 to 98%, even if the sludge is incinerated or landfilled (with calcined lime or iron chloride), it is dehydrated by vacuum filtration or pressure filtration. Dewatered sludge is called dewatered cake and the water content of dehydrated cake is about 70 ~ 75%.

슬러지는 천일건조 혹은 가열건조하여 비료로 사용되기도 하나, 대부분은 소각처리 되고 있다고는 하지만 소각처리에도 보조연료의 소요량이 수분함량에 따라 매우크므로 경제적 어려움이 크다. 따라서 매립등의 처리에도 함수량이 많으므로 어려움이 크므로 해양투기등의 편법처리가 자행되고 있다.Sludge can be used as fertilizer by sun drying or heat drying, but most of the sludge is incinerated, but the incineration is also very difficult due to the large amount of auxiliary fuel required. Therefore, since the water content is large in the landfill and the like, since the difficulty is large, the disposal of the sea dumping and the like is performed.

상술한 바와 같이 슬러지는 함수율이 많으므로 일반적으로 천일 건조를 기대하며, 매립처리하고 있으나 표면 건조에 의한 내부수분의 휘산이 저조하므로 쉽게 제거되지 않는다.As described above, the sludge has a high water content and generally expects sun drying, and is landfilled, but volatilization of internal moisture due to surface drying is low and is not easily removed.

슬러지들은 미세한 입자들과 다량의 물을 함유하는 응집제 사용으로 침강된 상태이므로 진공 또는 가압여과등에 의한 기계적 탈수라도 약 70% 이하로의 수분 제거에는 어려움이 있다. 그러나 적응 건조장치중 통기회전 건조장치에 의하여서도 이송 또는 교반중에 장치와의 접촉면에서의 교착화 현상은 탈수를 방해하여 효율이 저하되므로 슬러지의 탈수는 쉽게 이루어지지 않는다.Since the sludge is settled by the use of flocculents containing fine particles and a large amount of water, it is difficult to remove water to about 70% or less even by mechanical dehydration by vacuum or pressure filtration. However, the sludge dewatering of the sludge is not easily performed because the deadlocking phenomenon at the contact surface with the device during transfer or agitation also prevents dehydration and lowers the efficiency even through the aeration-rotation drying apparatus of the adaptive drying apparatus.

본 출원인은 여러가지를 실험을 거듭하여 폐열풍을 이용하는 슬러지의 이송, 교반을 효율화하며, 장치와의 접촉면으로의 슬러지의 교착화를 방지하고, 슬러지 입자와 수분과의 밀착 조직 균열을 높여서, 고형화를 최소화 하여서 건조효과를 높이도록 함을 특징으로 하며, 과열에 의한 건조 슬러지 입자의 표면의 일부산화도 방지하는 효과를 갖는 것을 특징으로 하는 무산소 슬러지 건조장치에 의하여 유가성 슬러지 등을 재활용 하려는데에 또한 목적이 있다.Applicant has repeatedly conducted various experiments to improve the transport and agitation of sludge using waste hot air, to prevent sludge from adhering to the contact surface with the apparatus, and to increase solidification cracks between the sludge particles and water, thereby improving solidification. It is characterized in that to increase the drying effect by minimizing, and to recycle valuable sludge by the oxygen-free sludge drying apparatus, characterized in that it has the effect of preventing the partial oxidation of the surface of the dry sludge particles by overheating. There is this.

도 1은 본 발명의 폐열풍을 이용하는 무산소 슬러지 건조장치의 단면도1 is a cross-sectional view of an oxygen-free sludge drying apparatus using the waste hot air of the present invention

도 2는 본 발명의 폐열풍을 이용하는 무산소 슬러지의 A-A단면도Figure 2 is a cross-sectional view A-A of anoxic sludge using the waste hot air of the present invention

※ 도면의 주요 부분에 대한 부호의 설명※ Explanation of codes for main parts of drawing

1 : 슬러지 투입구(쌍스크류식) 2 : 건조슬러지의 배출구1: Sludge inlet (double screw type) 2: Outlet of dry sludge

3 : 회전축 4 : 회전교반이송익3: rotary shaft 4: rotary stir feed

5 : 이송스크류 6 : 수증기 배출구5 transfer screw 6 steam outlet

7 : 폐열풍 배출구 8,8',8" : 폐열풍투입구7: waste hot air outlet 8,8 ', 8 ": waste hot air inlet

9 : 가열버어너 10 : 내화단열가마9: heating burner 10: fireproof insulation kiln

11 : 건조기 12 : 열풍분사부11: dryer 12: hot air blowing unit

13 : 쌍스크류 구동장치 14 : 회전축 구동장치13 twin screw drive device 14 rotating shaft drive device

15 : 블로우어 16 : 부우스터15: blower 16: booster

본 발명에서는 상술한 바와 같은 여러가지 문제점을 해결하기 위하여 통기 교반형 건조장치에 있어서 연속적인 슬러지의 투입과 슬러지 표면 건조로 인한 건조장치물 접촉면에 고착화 방지를 위하여 쌍스크류로 슬러지와 함께 열풍으로 투입하도록 하였으며, 건조장치의 회전교반장치와 열풍의 접촉과 순환을 극대화 하도록 강구하였다. 따라서 건조장치의 가열가마에서의 폐열풍을 활용해서 슬러지 투입에 건조기내의 교반장치축을 통해서 건조장치내에 투입하도록 하여 이송 교반을 효율화 하면서 건조를 촉진하는 한편 건조기내의 수분 배출에도 기여하도록 하였다.In the present invention, in order to solve the various problems as described above, in the aeration agitation type drying apparatus was introduced into the hot air together with the sludge as a double screw in order to prevent the solidification of the contact surface of the drying apparatus due to the continuous input of the sludge and the sludge surface drying. In order to maximize the contact and circulation of the rotary stirrer and the hot air of the drying device, Therefore, the waste hot air from the heating kiln of the drying apparatus was used to feed the sludge into the drying apparatus through the agitator shaft in the dryer, thereby promoting drying while contributing to efficient agitation and contributing to the discharge of moisture in the dryer.

그러한 효과를 극대화를 위해서 통기회전 건조장치는 원형으로 하여 교반익의 상층부분에 증발되는 수분의 배출을 블로우어로 흡입 배출하므로써 무산소 슬러지 건조장치로 구성하였다.In order to maximize the effect, the aeration rotary drying device was formed in an oxygen-free sludge drying device by suctioning and discharging the discharge of the water evaporated in the upper part of the stirring blade as a blower.

본 발명의 폐열풍을 이용하는 무산소 슬러지 건조장치를 다음의 첨부 도면과함께 그의 실시 형태를 상세히 설명한다.An embodiment of the anoxic sludge drying apparatus using the waste hot air of the present invention will be described in detail with reference to the accompanying drawings.

슬러지 투입구(1)로부터 투입되는 슬러지는 쌍스크류를 통해서 열풍과 함께 건조기(11)내로 투입되며, 건조기(11)내에서 서서히 교반되면서 열풍과 접촉하여 건조하며 이송되도록 하여 건조물 배출구(2)로부터 배출된다.The sludge introduced from the sludge inlet (1) is introduced into the dryer (11) with hot air through the twin screw, and is dried and transported in contact with the hot air while being slowly stirred in the dryer (11) to discharge from the dry product outlet (2). do.

스테인레스 강판으로 제조하는 건조기(11)는 원형으로 하고 그의 원형의 중심부 위치이하에 위치하도록 이송, 교반용 회전축(3)을 설치하여서 건조기(11)의 내부 상부측에 모이는 증발수분의 배출을 촉진하도록 하고 원형의 중심부 위치 위에서 열풍투입구(8')가 위치하도록 하여 열풍을 건조기(11)의 내부 상부측으로 분사시킨다.The dryer 11 made of stainless steel sheet is circular and provided with a rotating shaft 3 for transport and stirring so as to be located below the central position of the circle to facilitate the discharge of the evaporated water collected on the upper side of the dryer 11. Then, the hot air inlet 8 ′ is positioned above the circular central position to inject hot air into the upper portion of the dryer 11.

또 원형의 중심부 위치 이하에 마련한 이송 교반용 회전축(3)에도 교반익과 교반익 사이에 다수개의 열풍 분사구(12)를 마련하여 상기 이송교반용 회전축(3)이 회전할 때 슬러지와 열풍과의 접촉을 극대화시키므로서 슬러지의 조직 균열과 함께 건조 및 교반을 효율화 하였다.In addition, a plurality of hot air jetting holes 12 are also provided between the stirring blade and the stirring blade in the rotating stirring shaft 3 provided below the circular central position, so that the sludge and hot air contact when the rotating stirring shaft 3 for rotating stirring is rotated. By maximizing the efficiency of drying and stirring together with the tissue cracking of the sludge.

가열버어너(9)로 가마(10)내의 건조기(11)를 가열하고, 가마(10)에서 배출되는 폐열풍은 배출구(7)를 통해서 나오며, 부우스터(16)를 통해서 폐열풍투입구(8,8',8")로 분출되도록 하여서 건조기(11)내에 투입하여 슬러지의 건조와 교반에 기여하고 수증기를 동반하여 수증기 배출구(6)를 거쳐서 배출하여 냉각조로 도입해서 냉각 흡수처리 한다.The dryer 11 in the kiln 10 is heated by the heating burner 9, and the waste hot air discharged from the kiln 10 is discharged through the outlet 7, and the waste hot air inlet 8 is boosted through the booster 16. , 8 ', 8 ") are injected into the dryer 11 to contribute to the drying and agitation of the sludge, accompanied by water vapor, discharged through the water vapor outlet 6, introduced into a cooling bath, and cooled and absorbed.

(실시예)(Example)

본 발명의 건조장치에서 건조기는 1550㎜φ×13m의 크기로 하였고, 원통 중심으로부터 250㎜ 아래에 회전축이 위치하도록 설치하였다. 이송, 교반용 회전축은 열교환기용 강관(70㎜φ)를 사용하였으며, 건조기 및 이송, 교반익 등은 스테인레스 강판재를 사용하였다.In the drying apparatus of the present invention, the dryer was set to a size of 1550 mm φ x 13 m, and was installed so that the rotating shaft was positioned 250 mm below the center of the cylinder. The rotating shaft for conveying and stirring was used a steel pipe for heat exchanger (70 mmφ), and the stainless steel plate was used for the dryer and the conveying and stirring blade.

먼저, 내화단열가마(10)의 화실에 일정 간격으로 다수 설치된 가열버어버(9)로 건조기(11)를 가열하고, 배출되는 폐열풍을 부우스터(16)를 통해서 폐열풍투입구(8)로부터 투입하여서 가마(10) 내부 온도가 약 150℃가 될 때부터 슬러지 투입구(1)로 하수처리장 슬러지를 투입하면서 이송 교반용 회전축(3)을 회전시키고 폐열풍투입구(8,8'8")로부터 폐열풍을 투입 분사하여서 건조작업을 진행하였다.First, the dryer 11 is heated with a heating burr 9 installed in a plurality of fireboxes at predetermined intervals in the firebox of the fireproof thermal insulation kiln 10, and the waste hot air discharged from the waste hot air inlet 8 through the booster 16. When the internal temperature of the kiln 10 is about 150 ° C., the sludge inlet 1 is introduced into the sewage treatment plant sludge and the rotary shaft 3 for transport stirring is rotated and the waste hot air inlet 8,8'8 " Waste hot air was injected and sprayed to proceed with the drying operation.

S시종말하수처리장 슬러지(함수율 82%)를 슬러지 투입구(1)로부터 일정량씩 연속 투입하여 24시간 운전한 결과 회전축의 회전속도 변화에 따르는 건조 슬러지 배출구(2)로부터 배출되는 건조슬러지의 량과 그의 함수량의 결과는 표1과 같았다.The amount of dry sludge discharged from the dry sludge outlet 2 according to the change of the rotational speed of the rotating shaft as a result of continuously feeding the sludge (water content: 82%) from the sludge inlet (1) continuously for 24 hours The results of the water content are shown in Table 1.

표. 1table. One

회전속도(RPM)Rotational Speed (RPM) 1010 88 55 33 22 건조물 배출량(M/T)Building emissions (M / T) 10.510.5 9.79.7 7.87.8 5.95.9 5.15.1 함수율(%)Moisture content (%) 4242 3939 3131 2323 2020

이때 슬러지의 투입량은 20M/T이였고, 건조물이 입자 크기는 회전속도가 클수록 큰 것이 많았고(약 3∼5㎝크기), 회전 속도가 작을수록 적었다(약 1∼3㎝크기).At this time, the amount of sludge added was 20 M / T, and the larger the particle size of the dried material was, the larger the rotational speed was (large about 3 to 5 cm) and the smaller the rotational speed was (about 1 to 3 cm).

본 발명의 건조장치는 다량의 함수량을 함유하는 슬러지를 건조기를 가열한폐열품을 시료와 건조기내로 분사하여 슬러지의 고착화를 방지하며, 교반, 이송을 극대화시키므로 연료의 절감에 기여하고 하수종말 처리장의 슬러지 뿐만 아니라 각종 슬러지는 물론 음식물 쓰레기 등 다량의 수분(적어도 50%이상)을 함유하는 슬러지등을 무산소 분위기에서 건조하여 경제성 있게 재활용 하는데에 기여한다.The drying apparatus of the present invention prevents the solidification of the sludge by spraying the waste heat that heated the dryer to the sample and the dryer, maximizes the agitation and transfer, and contributes to the reduction of fuel and the sewage treatment plant of the sewage treatment plant. In addition to sludge, various sludges, as well as food waste, which contain a large amount of water (at least 50% or more) are dried in an oxygen-free atmosphere and contribute to economical recycling.

Claims (1)

횡형 통기 교반 슬러지 건조장치에 있어서,In the horizontal type aeration stirred sludge drying apparatus, 쌍스크류를 이용하는 슬러지 투입구로부터 폐열풍과 함께 투입하는 쌍스크류 슬러지 투입구와 원형 건조기의 중심부 이하에 이송 교반용 회전축을 마련하며, 회전축부에 다수개의 열풍분사구와 건조기 일측부에 마련되는 열풍 분사구로부터 투입되는 열풍은 건조기를 가열 교반하기 위한 내화단열가마로부터의 폐열풍을 이용하여, 무산소 분위기로 하며, 건조기 내부에서의 수증기는 폐열풍과 함께 수증기 배출구로 배출하게 하는 것을 특징으로 하는 폐열풍을 이용한 무산소슬러지 건조장치.A twin screw sludge inlet for input with waste hot air from a sludge inlet using twin screws and a rotary shaft for transfer stirring are provided below the center of the circular dryer, and are introduced from a plurality of hot air jets and a hot air jet inlet at one side of the dryer shaft. The hot air to be used is an anoxic atmosphere by using waste hot air from a refractory insulator kiln for heating and stirring the dryer, and the steam inside the dryer is discharged to the steam outlet along with the waste hot air. Sludge drying equipment.
KR10-2000-0030729A 2000-06-05 2000-06-05 Sludge drier using wasting heat KR100380527B1 (en)

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KR100381360B1 (en) * 2000-08-04 2003-04-23 정효종 Device for drying the trash
KR20040001424A (en) * 2002-06-28 2004-01-07 벽산엔지니어링주식회사 Apparatus and method for drying the sludge with the heat of combustion of dry distillation gas from waste plastic
KR100830367B1 (en) * 2006-11-28 2008-05-20 주식회사 유니온 이시엠 Sludge drying apparatus
KR100830565B1 (en) * 2006-07-19 2008-05-22 아름다운 환경건설(주) Apparatus for purifying contaminated soil, method therefor, pre-heater feeding device and rotary kiln type purifying device used to them
KR101277150B1 (en) * 2013-02-28 2013-06-20 주식회사 오투 Drying device of organic matter
KR101676224B1 (en) * 2016-05-26 2016-11-15 경상대학교산학협력단 Pyrolysis processing unit using plant waste by waste heat

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KR100793828B1 (en) 2006-07-19 2008-01-10 (주)청명씨에스 Heat treatment equipment of sludge using superheated vapor
KR100702579B1 (en) 2006-10-19 2007-04-02 주식회사 월드이노텍 a dryness factor adjustment for sludge
KR100897207B1 (en) * 2008-09-24 2009-05-14 이태식 Sludge drying machine
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JPH0188800U (en) * 1987-12-04 1989-06-12
KR20000050782A (en) * 1999-01-14 2000-08-05 여광웅 High-speed drying apparatus
KR200183875Y1 (en) * 2000-01-07 2000-06-01 최광집 Apparatus for drying food-waste
KR200200354Y1 (en) * 2000-05-09 2000-10-16 권형식 Drying apparatus for dung of a domestic animal

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KR100381360B1 (en) * 2000-08-04 2003-04-23 정효종 Device for drying the trash
KR20040001424A (en) * 2002-06-28 2004-01-07 벽산엔지니어링주식회사 Apparatus and method for drying the sludge with the heat of combustion of dry distillation gas from waste plastic
KR100830565B1 (en) * 2006-07-19 2008-05-22 아름다운 환경건설(주) Apparatus for purifying contaminated soil, method therefor, pre-heater feeding device and rotary kiln type purifying device used to them
KR100830367B1 (en) * 2006-11-28 2008-05-20 주식회사 유니온 이시엠 Sludge drying apparatus
KR101277150B1 (en) * 2013-02-28 2013-06-20 주식회사 오투 Drying device of organic matter
KR101676224B1 (en) * 2016-05-26 2016-11-15 경상대학교산학협력단 Pyrolysis processing unit using plant waste by waste heat

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