KR20020096757A - Rotary dryer recirculation with exhaust gas - Google Patents

Rotary dryer recirculation with exhaust gas Download PDF

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Publication number
KR20020096757A
KR20020096757A KR1020010035594A KR20010035594A KR20020096757A KR 20020096757 A KR20020096757 A KR 20020096757A KR 1020010035594 A KR1020010035594 A KR 1020010035594A KR 20010035594 A KR20010035594 A KR 20010035594A KR 20020096757 A KR20020096757 A KR 20020096757A
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KR
South Korea
Prior art keywords
exhaust
exhaust gas
aggregate
dryer
recirculation
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KR1020010035594A
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Korean (ko)
Inventor
배철호
김수연
이상원
박시우
Original Assignee
배철호
김수연
이상원
박시우
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Application filed by 배철호, 김수연, 이상원, 박시우 filed Critical 배철호
Priority to KR1020010035594A priority Critical patent/KR20020096757A/en
Publication of KR20020096757A publication Critical patent/KR20020096757A/en

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Classifications

    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Road Paving Machines (AREA)

Abstract

PURPOSE: An EGR(Exhaust Gas Recirculation) type aggregate dryer having a rotating drum is provided to maximize the fuel use efficiency of a rotating drum aggregate dryer by applying the EGR technique and to reduce the fuel consumption by using the waste heat of the exhaust gas. CONSTITUTION: Aggregate(8) put into a rotating drum(1) is dried by contacting to the hot combustion gas(11) supplied from a burner(2). To recover the waste heat of the exhaust gas(12) discharged from an aggregate dryer, the exhaust gas is recirculated by a recirculation flow rate control valve(4) and a recirculation fan(3). The recirculated exhaust gas is mixed with the external air(10). The mixed air is supplied to the burner.

Description

배기 재순환형 회전드럼 골재 건조기{Rotary dryer recirculation with exhaust gas}Rotary dryer recirculation with exhaust gas

본 발명은 배기를 재순환시켜 사용에너지를 절약하는 배기 재순환형 회전드럼 골재 건조기에 대한 것이다. 본 발명의 기술은 골재 건조기의 연료소비를 줄이기 위하여 배기의 일부를 재순환시켜 배기의 폐열을 회수하는 방법과 이를 골재 건조기에 적용하는 것이다. 본 발명의 목적은 배기의 폐열을 회수하여 이용함으로써 건조에 필요한 연소가스를 발생시키는데 소비되는 연료를 절약하는 것이다.The present invention relates to an exhaust recycle type rotary drum aggregate dryer that recycles exhaust to save energy. The technique of the present invention is to recover a waste heat of the exhaust by recycling a part of the exhaust in order to reduce the fuel consumption of the aggregate dryer and apply it to the aggregate dryer. An object of the present invention is to save the fuel consumed to generate the combustion gas required for drying by recovering and using the waste heat of the exhaust.

회전드럼 골재 건조기에서 투입된 골재는 회전드럼 속에서 회전하는 동안 버너에서 공급된 뜨거운 연소가스에 의하여 건조된다. 지금까지 개발된 기존의 회전드럼 골재 건조기의 경우 버너에서 공급된 연소가스는 회전드럼을 1회 통과하면서 골재와 열교환을 한 후 대기 중으로 배출하게 되어 있다. 따라서 기존의 골재 건조기는 배기에 포함된 상당량의 이용 가능한 에너지를 폐열의 형태로 대기 중에 배출하는 구조로 되어 있다. 그러므로 본 발명에서는 배기의 폐열을 회수하여 이용함으로써 회전드럼 골재 건조기의 소비에너지를 크게 줄일 수 있다. 즉 적당량의 배기를 재순환시켜 외기와 혼합하여 버너로 투입함으로써 적은 연료의 연소로도 건조에 필요한 온도와 유량의 연소가스를 얻을 수 있다. 재순환되는 배기의 유량은 재순환팬과 재순환 유량조절 밸브에 의하여 조절된다. 본 발명으로 골재 건조기에서 건조에 필요한 연소가스의 온도와 유량이 유지되는 조건하에서 적정량의 배기를 버너 쪽으로 재순환시켜서 연료소비를 크게 줄일 수 있다.Aggregate introduced from the rotary drum aggregate dryer is dried by hot combustion gas supplied from the burner while rotating in the rotary drum. In the conventional rotary drum aggregate dryer developed so far, the combustion gas supplied from the burner passes through the rotary drum once, exchanges heat with the aggregate, and is then discharged into the atmosphere. Therefore, existing aggregate dryers have a structure in which a considerable amount of available energy contained in the exhaust is discharged to the atmosphere in the form of waste heat. Therefore, the present invention can significantly reduce the energy consumption of the rotary drum aggregate dryer by recovering and using the waste heat of the exhaust. In other words, by recirculating the appropriate amount of exhaust gas, mixing it with outside air and injecting it into the burner, combustion gas having a temperature and flow rate required for drying can be obtained even with a small amount of fuel combustion. The flow rate of the recirculated exhaust is controlled by the recirculation fan and the recirculation flow control valve. The present invention can significantly reduce fuel consumption by recycling an appropriate amount of exhaust gas to the burner under the condition that the temperature and flow rate of the combustion gas required for drying in the aggregate dryer are maintained.

본 발명의 목적은 회전드럼 골재 건조기에서 배기의 폐열를 회수하여 이용함으로써 건조에 소비되는 연료를 절약하는 것이다.An object of the present invention is to save the fuel consumed for drying by recovering and using the waste heat of the exhaust in the rotary drum aggregate dryer.

기존의 회전드럼 골재 건조기는 버너에서 발생된 연소가스를 한 번 사용하고 모두 대기 중으로 배출함으로써 연소가스가 가지고 있는 에너지의 상당량을 폐열로 대기 중으로 버리는 구조로 제작되어 있다. 그러므로 기존 건조기에서 적정량의 배기를 재순환시켜서 다시 사용한다면 그냥 버려지는 에너지의 상당량을 회수할 수있다.Existing rotary drum aggregate dryer is manufactured by using burner gas generated from burner once and discharging all of it into the atmosphere to dissipate considerable amount of energy of combustion gas into waste heat. Therefore, if you recycle the proper amount of exhaust from the existing dryer and use it again, you can recover a considerable amount of energy that is just thrown away.

본 발명의 기술은 회전드럼 건조기의 연료소비를 줄이기 위하여 배기의 일부를 재순환시켜 배기의 폐열을 회수하는 방법과 이를 회전드럼 건조기에 적용하는 것이다.The technique of the present invention is to recover a waste heat of the exhaust by recycling a part of the exhaust in order to reduce the fuel consumption of the rotary drum dryer and apply it to the rotary drum dryer.

본 발명에서는 배기 재순환 기술을 적용하여 회전드럼 골재 건조기의 에너지 이용 효율을 극대화시키고, 고효율 배기 재순환형 회전드럼 골재 건조기를 개발하는 것이다.In the present invention, by applying the exhaust recycle technology to maximize the energy utilization efficiency of the rotating drum aggregate dryer, to develop a high-efficiency exhaust recirculation rotary drum aggregate dryer.

도 1은 본 발명의 배기 재순환형 회전드럼 골재 건조기의 개념을 설명하기 위한 개략도1 is a schematic view for explaining the concept of the exhaust recirculation rotary drum aggregate dryer of the present invention

■ 도면의 주요부분에 사용된 부호의 설명 ■■ Explanation of symbols used in main part of drawing ■

1. 회전드럼 2. 버너1. Rotating drum 2. Burner

3. 재순환 팬 4. 재순환 유량조절 밸브3. Recirculation Fan 4. Recirculation Flow Control Valve

5. 모터 6. 경사조절기5. Motor 6. Tilt adjuster

7. 지지대 8. 골재투입7. Support 8. Aggregate input

9.골재배출 10. 외기9. Aggregate discharge 10. Outdoor air

11.연소가스 12. 배기11.Combustion Gas 12.Exhaust

본 발명은 배기를 재순환시켜 사용에너지를 절약하는 배기 재순환형회전드럼 골재 건조기에 대한 것이다. 본 발명의 목적은 배기의 폐열를 회수함으로써 건조에 필요한 연소가스를 발생시키는데 소비되는 연료를 절약하는 것이다.The present invention relates to an exhaust recycle type rotary drum aggregate dryer that recycles exhaust to save energy. It is an object of the present invention to save the fuel consumed in generating the combustion gases required for drying by recovering the waste heat of the exhaust.

즉 도1에서 회전드럼(1) 속으로 투입된 골재(8)는 회전드럼(1) 속에서 회전하는 동안 버너(2)에서 공급된 뜨거운 연소가스(11)와 접촉하여 건조되게 되어있다. 지금까지 개발된 골재 건조기의 경우 버너(2)에서 공급된 연소가스(11)는 회전드럼(1) 속을 1회 통과하면서 투입된 골재(8)를 건조한 후 대기 중으로 배출되게 되어 있다. 따라서 기존의 골재 건조기에서 배출되는 배기(12)는 비교적 고온상태로 상당량의 이용 가능한 에너지를 포함하고 있다. 본 발명은 배기의 폐열을 회수하기 위하여 재순환 유량 조절 밸브(4)와 재순환 팬(3)으로 적정량의 배기(12)를 재순환시켜 외기(10)와 혼합하고, 이 혼합기를 버너(2)에 공급함으로써 사용연료를절약하고자 한다. 다시 말하면 외기(10)는 재순환되는 배기와 혼합됨에 따라 그 온도가 상승하게 되며, 동일한 양의 연료를 연소시키는 기존 골재 건조기에 비하여 연소가스의 온도는 상승하게 된다. 그러므로 기존의 골재 건조기에 비하여 적은 양의 연료를 연소시켜 동일한 연소가스의 온도를 얻을 수 있게 된다. 본 발명은 배기의 에너지를 회수함으로써 보다 적은 연료의 연소로 건조에 필요한 연소가스를 발생시키는데 소비되는 연료를 절약하는 것이다.That is, the aggregate 8 introduced into the rotating drum 1 in FIG. 1 is made to dry in contact with the hot combustion gas 11 supplied from the burner 2 while rotating in the rotating drum 1. In the case of the aggregate dryer developed so far, the combustion gas 11 supplied from the burner 2 is discharged to the atmosphere after drying the injected aggregate 8 while passing through the rotary drum 1 once. Therefore, the exhaust 12 discharged from the existing aggregate dryer contains a considerable amount of available energy at a relatively high temperature. The present invention recycles the appropriate amount of the exhaust 12 by the recirculation flow control valve 4 and the recirculation fan 3 to recover the waste heat of the exhaust, mixes it with the outside air 10, and supplies the mixer to the burner 2. By doing so, we save fuel. In other words, the temperature of the outside air 10 is increased as it is mixed with the exhaust gas being recycled, and the temperature of the combustion gas is increased as compared with the existing aggregate dryer that burns the same amount of fuel. Therefore, it is possible to obtain the same combustion gas temperature by burning a small amount of fuel compared to the conventional aggregate dryer. The present invention saves the fuel consumed in generating the combustion gas required for drying with less fuel combustion by recovering the energy of the exhaust.

배기 재순환형 회전드럼 골재 건조기의 보급 및 사용은 골재 건조에 소비되는 연료를 크게 줄이고 에너지 이용효율 역시 크게 높여줄 것이다. 그 동안 골재 건조에 낭비되어왔던 많은 에너지를 회수하게 되므로 우리나라 전체의 규모로 생각한다면 많은 양의 에너지를 절약할 수 있을 것이다.The replenishment and use of exhaust recirculating drum drum dryers will greatly reduce the fuel consumed to dry aggregates and increase energy efficiency. Since it will recover a lot of energy that has been wasted in the aggregate drying in the meantime, if you think the size of the whole country will be able to save a large amount of energy.

Claims (4)

골재를 연소가스로 건조하는 회전드럼 건조기에서 배기를 재순환하여 사용에너지를 절약하는 방법How to save energy by recirculating the exhaust in the rotary drum dryer to dry the aggregate into combustion gas 1항에서 배기를 재순환하기 위하여 팬 또는 송풍기가 부착된 관 또는 덕트를 설치된 회전드럼 건조기Rotary drum dryers fitted with fans or blowers or pipes or ducts for recirculating exhaust in paragraph 1 1항에서 배기를 재순환하기 위하여 유량조절 밸브가 부착된 관 또는 덕트를 설치된 회전드럼 건조기Rotary drum dryers equipped with pipes or ducts with flow control valves for recirculating the exhaust in paragraph 1 1항에서 배기를 재순환하기 위하여 유량조절밸브와 팬 또는 송풍기가 부착된 관 또는 덕트를 설치된 회전드럼 건조기Rotary drum dryers equipped with flow control valves and pipes or ducts fitted with fans or blowers to recirculate the exhaust in paragraph 1.
KR1020010035594A 2001-06-21 2001-06-21 Rotary dryer recirculation with exhaust gas KR20020096757A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01306794A (en) * 1988-06-03 1989-12-11 Chugai Ro Co Ltd Hot airflow generating device
KR970018112U (en) * 1995-10-26 1997-05-23 김영수 Aggregate Dryer for Ascon Production
JPH10332264A (en) * 1997-04-01 1998-12-15 Heidelberger Druckmas Ag Waste gas recirculating dryer for material web

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01306794A (en) * 1988-06-03 1989-12-11 Chugai Ro Co Ltd Hot airflow generating device
KR970018112U (en) * 1995-10-26 1997-05-23 김영수 Aggregate Dryer for Ascon Production
JPH10332264A (en) * 1997-04-01 1998-12-15 Heidelberger Druckmas Ag Waste gas recirculating dryer for material web

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