KR200171199Y1 - A circulator for direct-heating waste water condensing system - Google Patents

A circulator for direct-heating waste water condensing system Download PDF

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KR200171199Y1
KR200171199Y1 KR2019980000702U KR19980000702U KR200171199Y1 KR 200171199 Y1 KR200171199 Y1 KR 200171199Y1 KR 2019980000702 U KR2019980000702 U KR 2019980000702U KR 19980000702 U KR19980000702 U KR 19980000702U KR 200171199 Y1 KR200171199 Y1 KR 200171199Y1
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wastewater
tank
combustion chamber
concentration tank
hot air
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KR2019980000702U
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KR980002856U (en
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황보연
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설옥덕
주식회사서광플랜트
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/14Evaporating with heated gases or vapours or liquids in contact with the liquid
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048Purification of waste water by evaporation

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

본 고안은 직가열식 폐수증발처리시스템의 폐수재순환장치에 관한 것이다.본 고안에 따르면, 폐수가 유입되는 농축조(10)와, 상기 농축조(10)의 상부에 설치되며 버너(22)가 구비된 연소실(20)과, 상기 연소실(20)의 일측에 연통되며 연소실(20) 내로 가압공기를 주입하는 송풍기구(30)와, 상기 연소실(20)과 농축조(10) 사이에 설치되며 버너(22)에 의해 가열된 열풍을 하부의 농축조(10) 내에 저류된 폐수 속으로 유도하는 열풍가이드(24)와, 상기 농축조(10)에서 증발된 수증기를 배출하는 배기관(40)과, 상기 농축조(10)에서 농축된 폐액을 배출하는 배출관(50)을 포함하는 직가열식 폐수농축증발장치에 있어서, 상기 농축조(10)의 하단 근처에서 폐수를 빼내어 순환펌프(62)를 통해 연소실(20) 하단의 열풍가이드(24) 상부로 복귀시키는 순환관(63)과, 상기 순환관(63)의 중간에 접속되는 거품제거조(66)를 포함하는 재순환기구(60)가 구비되고, 상기 거품제거조(66) 내의 유입단(63a)은 유출단(63b)보다 상부에 배치된 직가열식 폐수농축증발시스템의 재순환장치가 제공된다.The present invention relates to a wastewater recirculation apparatus of a direct heating wastewater evaporation treatment system. According to the present invention, a combustion chamber in which a wastewater flows in and a burner (22) are installed on an upper portion of the concentration tank (10). 20, a blower mechanism 30 communicating with one side of the combustion chamber 20 and injecting pressurized air into the combustion chamber 20, and installed between the combustion chamber 20 and the concentration tank 10 and the burner 22. Hot air guide 24 to guide the hot air heated by the water into the waste water stored in the concentration tank 10 of the lower, exhaust pipe 40 for discharging the water vapor evaporated from the concentration tank 10, and the concentration tank 10 In the direct heating type wastewater concentration evaporation apparatus including a discharge pipe (50) for discharging the concentrated waste liquid from the wastewater, the hot air guide at the bottom of the combustion chamber (20) through the circulation pump (62) by extracting the wastewater near the lower end of the concentration tank (10). (24) The circulation pipe 63 which returns to an upper part, and the middle of the said circulation pipe 63 A recirculation mechanism (60) including a bubble removing tank (66) connected thereto is provided, and the inlet (63a) in the bubble removing tank (66) is directly heated wastewater concentration evaporation disposed above the outlet (63b). A recirculation system of the system is provided.

Description

직가열식 폐수증발농축시스템의 폐수재순환장치Wastewater Recirculation System of Direct Heating Wastewater Evaporation Concentration System

본 고안은 직가열식 폐수증발처리시스템의 폐수재순환장치에 관한 것으로서, 좀 더 상세히는 농축조에서 재순환되는 폐수에 함유된 거품을 제거함으로써 폐수의 원활한 농축처리를 가능케하고 장치의 과열로 인한 고장을 방지할 수 있는 폐수증발농축시스템의 폐수재순환장치에 관한 것이다.The present invention relates to a wastewater recirculation apparatus of a direct-heated wastewater evaporation treatment system. More specifically, it is possible to smoothly process wastewater by removing bubbles contained in recycled wastewater in a concentration tank and to prevent failure due to overheating of the apparatus. The present invention relates to a wastewater recirculation apparatus of a wastewater evaporation concentration system.

염색공장이나 도금공장 기타 각종 폐수배출업소나 폐수처리업소에서 폐수를 처리하기 위해서는 폐수를 농축시켜서 소각하거나, 농축건조후 케이크상태로 매립하는 등의 방법을 사용한다. 이와같이, 폐수를 소각하거나 케이크화시키기 위해서는 일차로 폐수를 가열하여 농축시키는 과정을 필요로 한다. 그런데, 종래의 폐수처리과정에서 폐수를 가열농축시키는 방법은 스팀이나 고온수가 순환되는 보일러의 관속으로 폐수를 통과시켜서 폐수를 가열농축하는 방법이 사용되었다. 그러나, 이와같은 보일러에 의한 간접가열방식에 의할 때에는, 열효율이 낮고 폐수에 함유된 다량의 유해물질이나 화학성분, 기타 이물질로 인해서 보일러 내부의 관이 급격하게 부식되거나 관 내주면에 스케일이 발생하여 보일러관이 단시간 내에 막히게 되어, 장치가 오래지 않아 작동을 멈추는 등의 심각한 문제점이 있었다. 이로 인해 폐수처리장치를 한번에 장시간 가동하는 것이 곤란하고, 부단한 유지보수를 요함으로써 제때에 폐수를 처리하지 못함으로써여 폐수를 무단방류하는 폐단이 초래되기도 하였다.To treat wastewater in dyeing factories, plating factories, and other wastewater discharge and treatment facilities, the wastewater is concentrated, incinerated, or concentrated, dried, and then landfilled in a cake state. As such, in order to incinerate or cake the wastewater, the wastewater is first heated and concentrated. However, in the conventional wastewater treatment process, the method of heating and concentrating wastewater has been used by heating and concentrating the wastewater by passing the wastewater through a tube of a boiler through which steam or hot water is circulated. However, in the indirect heating method by such a boiler, the thermal efficiency is low and a large amount of harmful substances, chemicals, and other foreign substances in the waste water cause corrosion of the pipe inside the boiler and scale on the inner circumferential surface of the boiler. Boiler tube is blocked in a short time, there was a serious problem such as stopping the operation of the device not long. As a result, it is difficult to operate the wastewater treatment system for a long time at a time, and the endless maintenance of the wastewater has been caused by the inability to treat the wastewater in a timely manner due to uninterrupted maintenance.

본 고안은 전술한 바와같은 종래의 폐수농축처리장치의 문제점에 착안하여 제안된 것으로서, 버너를 이용하여 직접 폐수를 가열하면서 농축조 내의 폐수를 재순환시킴으로써 에너지효율이 높고, 폐수의 처리과정이 원활하게 이루어질 수는 새로운 구조의 직가열식 폐수증발농축시스템의 재순환장치를 제공하고자 하는 것이다. 본 고안은 이를 위해, 거품제거기능을 가진 재순환기구를 농축조에 부설함으로써 폐수의 원활한 순환과 이를 통한 시스템의 안정을 기하는 방안이 제공된다.The present invention has been proposed in view of the problems of the conventional wastewater concentrating device as described above, by recycling the wastewater in the concentration tank while directly heating the wastewater using a burner, the energy efficiency is high, and the wastewater treatment process is made smoothly. Water aims to provide a recirculation system for the new structure of the direct heating wastewater evaporation concentration system. The present invention provides a method for ensuring a smooth circulation of the wastewater and the stability of the system by installing a recirculation mechanism having a bubble removing function in the concentration tank for this purpose.

도 1은 본 고안에 따른 폐수증발농축시스템의 전체구성도1 is an overall configuration of the wastewater evaporation concentration system according to the present invention

도 2는 본 고안의 폐수재순환장치의 구성도2 is a block diagram of a wastewater recirculation apparatus of the present invention

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10. 농축조 12. 중화조10. Thickener 12. Neutralizer

20. 연소실 22. 버너20. Combustion chamber 22. Burners

24. 열풍가이드 30. 송풍기구24. Hot Air Guide 30. Blower

40. 배기관 50. 배출관40. Exhaust Pipe 50. Exhaust Pipe

60. 재순환기구 62. 순환펌프60. Recirculation mechanism 62. Circulation pump

63. 순환관 65. 차단벽63. Circulation pipe 65. Barrier wall

66. 거품제거조 67. 하향차단벽66. Bubble removing tank 67. Downward blocking wall

본 고안의 한 특징에 따르면, 원폐수 또는 전처리된 폐수가 유입되는 농축조(10)와, 상기 농축조(10)의 상부에 설치되며 버너(22)가 구비된 연소실(20)과, 상기 연소실(20)의 일측에 연통되며 연소실(20) 내로 가압공기를 주입하는 송풍기구(30)와, 상기 연소실(20)과 농축조(10) 사이에 설치되며 버너(22)에 의해 가열된 열풍을 하부의 농축조(10) 내에 저류된 폐수 속으로 유도하는 열풍가이드(24)와, 상기 농축조(10)에서 증발된 수증기를 배출하는 배기관(40)과, 상기 농축조(10)에서 농축된 폐액을 배출하는 배출관(50)을 포함하는 직가열식 폐수농축증발장치에 있어서, 상기 농축조(10)의 하단 근처에서 폐수를 빼내어 순환펌프(62)를 통해 연소실(20) 하단의 열풍가이드(24) 상부로 복귀시키는 순환관(63)과, 상기 순환관(63)의 중간에 접속되는 거품제거조(66)를 포함하는 재순환기구(60)가 구비되고, 상기 거품제거조(66) 내의 유입단(63a)은 유출단(63b)보다 상부에 배치된 것을 특징으로 하는 직가열식 폐수농축증발시스템의 재순환장치가 제공된다.According to one feature of the present invention, a condensation tank 10 into which raw waste water or pretreated wastewater is introduced, a combustion chamber 20 installed above the concentrating tank 10, and provided with a burner 22, and the combustion chamber 20. Blowing mechanism 30 for injecting pressurized air into the combustion chamber 20 and communicated to one side of the), and installed between the combustion chamber 20 and the concentration tank 10, the hot air heated by the burner 22 to the lower concentration tank Hot air guide 24 leading to the waste water stored in (10), exhaust pipe 40 for discharging the water vapor evaporated in the concentration tank 10, discharge pipe for discharging the waste liquid concentrated in the concentration tank (10) In the direct heating type wastewater condensation evaporation apparatus comprising a 50), a circulating pipe for extracting the wastewater near the lower end of the concentration tank 10 and returning it to the upper portion of the hot air guide 24 at the bottom of the combustion chamber 20 through the circulation pump 62. (63) and a bubble removing tank (66) connected to the middle of the circulation pipe (63). Is provided with a rotation mechanism 60, the inlet end (63a) in the bubble removal tank 66 is the recirculation of the direct-heated waste water is concentrated evaporation system, characterized in that disposed in the upper portion than the outflow end (63b) is provided.

이하에서 도면을 참조하여 본 고안의 바람직한 실시예를 설명한다. 도 1은 본 고안에 따른 폐수증발농축장치의 실시예의 구성도이고, 도 2는 재순환장치의 요부구성도이다. 도시된 바와같이, 농축조(10)의 상부에는 연소실(20)이 직립설치된다. 연소실(20)의 상부에는 착화토치(26)와 연료분사노즐(27)이 구비되는 버너(22)가 설치된다. 연소실(20)의 저면은 농축조(10)를 향해 하향개방된다. 연소실(20)의 일측에는 송풍기(32)에 의해 연소실(30) 내로 고압으로 공기를 불어넣는 송풍기구(30)가 구비된다. 이 송풍기구(30)에 의해 버너(22)의 화염이 하향하게 되고, 이에 의해 열풍이 농축조(10) 쪽으로 향하게 된다.Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. 1 is a configuration diagram of an embodiment of the wastewater evaporation and concentration apparatus according to the present invention, Figure 2 is a main configuration diagram of the recirculation apparatus. As shown, the combustion chamber 20 is installed upright in the upper portion of the concentration tank (10). A burner 22 having an ignition torch 26 and a fuel injection nozzle 27 is provided at an upper portion of the combustion chamber 20. The bottom of the combustion chamber 20 is opened downward toward the concentration tank 10. One side of the combustion chamber 20 is provided with a blower mechanism 30 for blowing air at high pressure into the combustion chamber 30 by the blower 32. The flame of the burner 22 is lowered by this blowing mechanism 30, whereby hot air is directed toward the concentration tank 10. As shown in FIG.

연소실(20)과 농축조(10) 사이에는 상단이 테이퍼지고 하단이 폐수 속으로 연장되어 잠기는 열풍가이드(24)가 구비된다. 이 열풍가이드(24)의 저면은 폐색되고 그 하단 둘레에는 다수의 통공(25)이 형성되어 버너(22)에 의해 가열된 열풍이 열풍가이드(24)를 따라 유도되어 열풍가이드(24) 하단둘레의 통공(25)을 통해 폐수 속으로 분출되어 폐수를 교반하면서 직접 가열시키게 된다. 이와같이, 버너에 의한 열풍이 직접 폐수에 접촉하고 섞이면서 가열하므로 열효율이 20% 이상 향상되고, 보일러방식에 의한 스케일발생 등의 문제가 없다. 이때, 열풍에 의해 폐수가 지나치게 출렁이는 것을 방지하도록 농축조(10)에는 원통형 격벽형태의 차단판(14)이 배치된다.Between the combustion chamber 20 and the concentration tank 10 is provided with a hot air guide 24, the upper end of which is tapered and the lower end extends into the wastewater. The bottom surface of the hot air guide 24 is closed and a plurality of through holes 25 are formed around the bottom of the hot air guide 24 so that hot air heated by the burner 22 is guided along the hot air guide 24 so that the bottom circumference of the hot air guide 24 is formed. The through-hole 25 of the is discharged into the wastewater is directly heated while stirring the wastewater. In this way, since the hot air by the burner is directly in contact with the waste water and mixed while heating, the thermal efficiency is improved by more than 20%, there is no problem such as scale generation by the boiler method. At this time, the blocking tank 14 in the form of a cylindrical partition wall is disposed in the concentration tank 10 so as to prevent the waste water from excessively swelling due to the hot air.

이 농축조(10)의 일측에는, 원폐수를 약품으로 중화처리하는 중화조(12)가 배치되고, 이 중화조(12)로부터 피처리폐수를 공급펌프(13)를 통해 농축조(10)로 공급하는 공급관(11)이 농축조(10)로 접속된다. 그리고, 농축조(10)의 상부 일측에는 폐수의 가열에 의해 발생되는 수증기가 배출되는 배기관(40)이 설치된다. 이때, 수증기와 함께 배출되는 유해성분이 함유된 물방울 등은 배기관(40)의 중간에 설치된 데미스터(42)에 의해 포획되어 농축조(10)로 복귀된다.On one side of the concentration tank 10, a neutralization tank 12 for neutralizing the raw wastewater with a chemical is disposed, and the wastewater to be treated is supplied from the neutralization tank 12 to the concentration tank 10 through the supply pump 13. The supply pipe 11 to be connected is connected to the concentration tank 10. In addition, an exhaust pipe 40 through which the steam generated by heating the wastewater is discharged is installed at one upper side of the concentration tank 10. At this time, water droplets containing harmful components discharged together with water vapor are captured by the demister 42 installed in the middle of the exhaust pipe 40 and returned to the concentration tank 10.

열풍가스에 의해 가열되어 수증기가 증발됨으로써 대략 15% 내지 10% 정도의 부피로 줄어들면서 농축된 농축폐액은 배출관(50)과 배출펌프(52)를 통해 저장조(54)로 배출되어 처리된다.The concentrated concentrated waste liquid is heated and discharged to the storage tank 54 through the discharge pipe 50 and the discharge pump 52 while being heated by the hot air gas to reduce the volume to about 15% to 10% by evaporation of water vapor.

한편, 버너(22)에 의해 가열된 열풍은 대략 1000℃ 이상의 고온이므로, 열풍을 농축조(10)로 유도하는 열풍가이드(24)가 열에 녹거나 열화될 수 있으므로 이를 방지하기 위해서, 농축조(10)의 폐수를 순환시키는 재순환기구(60)가 구비된다.On the other hand, since the hot air heated by the burner 22 is a high temperature of about 1000 ° C. or more, in order to prevent the hot air guide 24, which guides the hot air into the concentration tank 10, may be melted or degraded in the heat, the concentration tank 10. A recirculation mechanism (60) for circulating wastewater is provided.

재순환기구(60)는 도 2에 도시된 바와같이, 농축조(10)의 하단에서 나온 유입관(63a)이 거품제거조(66) 내로 관통되어 거품제거조(66)의 중간부분으로 연장되며, 유출단(63b)은 상기 유입단(63a)보다 상대적으로 아래쪽의 대략 거품제거조(66)의 저면으로 연장되어 순환펌프(62)를 통해 연소실(20)와 열풍가이드(24) 사이로 연통된다. 이와같은 재순환기구(60)를 통해 연소실(20) 하단으로 복귀된 폐수가 분사되면서 일차로 하향차단벽(67)에 부딪히고 다시 원통형의 상향차단벽(65)에 고이면서 이릍 타고 넘어서 열풍가이드(24)의 내주면을 따라 흘러내리게 된다. 이에 의해 금속재의 열풍가이드(24)가 냉각되어 열품에 의해 녹아내리거나 열화되지 않도록 한다. 한편, 순환되는 폐수가 열풍가이드(24)를 따라 흘러내리면서 고온의 열풍에 닿아서 폐수 속에 함유되어 있던 유해가스성분이 연소된다. 상기 원통형 차단벽(65)은 폐수가 둘레를 따라 균등하게 흘러내리도록 차단벽(65)의 상단에는 일정간격으로 노치부(66)가 형성된다.Recirculation mechanism 60, as shown in Figure 2, the inlet pipe (63a) from the bottom of the thickening tank 10 is penetrated into the bubble removing tank 66 to extend to the middle portion of the bubble removing tank 66, The outlet end 63b extends to the bottom of the defoaming tank 66 relatively lower than the inlet end 63a and communicates between the combustion chamber 20 and the hot air guide 24 through the circulation pump 62. Wastewater returned to the lower end of the combustion chamber 20 through the recirculation mechanism 60 is injected, and firstly hits the downward blocking wall 67, and then collects on the cylindrical upward blocking wall 65 while riding over the hot air guide ( It flows down along the inner circumferential surface of 24). As a result, the hot air guide 24 of the metal material is cooled to prevent it from being melted or degraded by the hot product. On the other hand, the circulating wastewater flows down along the hot wind guide 24 and comes into contact with a high temperature hot wind to burn harmful gas components contained in the wastewater. The cylindrical blocking wall 65 has a notch 66 formed at a predetermined interval on the top of the blocking wall 65 so that the waste water flows down evenly along the circumference.

여기서 거품제거조(66)의 유입단(63a)으로 유입된 폐수에 함유된 거품은 기포상으로 상승되어 유면 위로 배출되고, 거품제거조(66) 하부의 거품이 제거된 폐수만이 유출단(63b)을 통해 농축조(10)로 복귀된다. 이와같이, 폐수에서 거품이나 기포를 제거함으로써, 순환관(63)과 상기 열풍가이드(24) 상부의 하향차단벽(67)에 의해 구획되는 공간에 에어가 차는 일이 방지되어, 차단벽(67)이 폐수에 접촉되지 않아서 열풍에 의해 과열되어 녹아내리거나, 폐수의 순환이 원활치 못하는 일이 없게된다.Here, the bubbles contained in the wastewater introduced into the inlet (63a) of the defoaming tank 66 is raised to the bubble phase and discharged over the oil surface, only the wastewater from which the bubbles below the defoaming tank 66 has been removed (outlet) ( It returns to the thickening tank 10 through 63b). In this way, by removing bubbles or bubbles from the waste water, air is prevented from being filled in the space partitioned by the circulation pipe 63 and the downward blocking wall 67 above the hot air guide 24, thereby blocking the barrier wall 67. Since it does not come into contact with the wastewater, it is not overheated and melted by the hot air, or the circulation of the wastewater is not smooth.

이상에서 설명한 본 고안에 따르면, 농축조(10) 상부에 연소실(20)을 배치하고, 송풍기구에 의해 버너의 화염과 열풍을 하향시켜 직접 폐수를 가열 농축시키고, 거품제거기를 구비한 재순환기구를 통해 폐수를 재순환시킴으로써, 종래와 같은 스케일발생으로 장치의 고장없이 원활하게 폐수를 농축시킬 수 있고, 에너지효율을 높이면서도 열풍에 의한 장치의 과열을 방지하고 아울러, 폐수에 함유된 가연성 물질의 소각을 촉진할 수 있다. 특히, 거품제거기를 통해 폐수의 순환경로상에서 에어로 인한 장치의 과열을 방지하고, 원활한 폐수의 순환을 달성함으로써 장치의 폐수처리성능을 높게 유지할 수 있다.According to the present invention described above, by placing the combustion chamber 20 on the condenser 10, the flame and hot air of the burner is lowered by the blower to directly heat-concentrate the wastewater, and through a recirculation mechanism having a defoamer By recycling the waste water, it is possible to concentrate the waste water smoothly without malfunction of the equipment by generating scale as in the prior art, and to prevent the overheating of the device by the hot air while improving energy efficiency, and also promote the incineration of the flammable substances contained in the waste water. can do. In particular, it is possible to maintain the wastewater treatment performance of the device by preventing the overheating of the device due to air on the circulation path of the wastewater through the defoamer, and achieve a smooth wastewater circulation.

Claims (1)

원폐수 또는 전처리된 폐수가 유입되는 농축조(10)와, 상기 농축조(10)의 상부에 설치되며 버너(22)가 구비된 연소실(20)과, 상기 연소실(20)의 일측에 연통되며 연소실(20) 내로 가압공기를 주입하는 송풍기구(30)와, 상기 연소실(20)과 농축조(10) 사이에 설치되며 버너(22)에 의해 가열된 열풍을 하부의 농축조(10) 내에 저류된 폐수 속으로 유도하는 열풍가이드(24)와, 상기 농축조(10)에서 증발된 수증기를 배출하는 배기관(40)과, 상기 농축조(10)에서 농축된 폐액을 배출하는 배출관(50)을 포함하는 직가열식 폐수농축증발장치에 있어서, 상기 농축조(10)의 하단 근처에서 폐수를 빼내어 순환펌프(62)를 통해 연소실(20) 하단의 열풍가이드(24) 상부로 복귀시키는 순환관(63)과, 상기 순환관(63)의 중간에 접속되는 거품제거조(66)를 포함하는 재순환기구(60)가 구비되고, 상기 거품제거조(66) 내의 유입단(63a)은 유출단(63b)보다 상부에 배치된 것을 특징으로 하는 직가열식 폐수농축증발시스템의 재순환장치.A condensation tank 10 into which raw waste water or pre-treated wastewater flows in, a combustion chamber 20 installed at an upper portion of the concentrating tank 10, and provided with a burner 22, is connected to one side of the combustion chamber 20, and a combustion chamber ( 20) a blower device 30 for injecting pressurized air into the waste water stored between the combustion chamber 20 and the concentration tank 10 and the hot air heated by the burner 22 in the lower concentration tank 10; Direct heat type wastewater comprising a hot air guide (24) to guide to, an exhaust pipe (40) for discharging water vapor evaporated from the concentration tank (10), and a discharge pipe (50) for discharging the waste liquid concentrated in the concentration tank (10). In the concentrated evaporation apparatus, a circulation pipe 63 for extracting wastewater near the lower end of the concentration tank 10 and returning it to the upper portion of the hot air guide 24 at the lower end of the combustion chamber 20 through the circulation pump 62 and the circulation pipe. A recirculation mechanism (60) comprising a bubble removing tank (66) connected in the middle of (63) is provided, and The inlet end (63a) in the air bubble removal tank (66) is a recirculation apparatus of the direct heating wastewater concentration evaporation system, characterized in that disposed above the outlet (63b).
KR2019980000702U 1998-01-22 1998-01-22 A circulator for direct-heating waste water condensing system KR200171199Y1 (en)

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