KR20040026202A - method of evaporatoring for vacuum evaporator - Google Patents

method of evaporatoring for vacuum evaporator Download PDF

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KR20040026202A
KR20040026202A KR1020020057569A KR20020057569A KR20040026202A KR 20040026202 A KR20040026202 A KR 20040026202A KR 1020020057569 A KR1020020057569 A KR 1020020057569A KR 20020057569 A KR20020057569 A KR 20020057569A KR 20040026202 A KR20040026202 A KR 20040026202A
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water
vacuum
evaporator
dryer
slurry
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KR1020020057569A
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KR100449416B1 (en
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고병산
송명모
고현백
조익현
양정남
고동균
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주식회사 세화엔스텍
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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
    • 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
    • C02F1/043—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
    • B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
    • 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
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • 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
    • C02F2301/00—General aspects of water treatment
    • C02F2301/06—Pressure conditions
    • C02F2301/063—Underpressure, vacuum

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

PURPOSE: Provided is a vacuum evaporation method using a vacuum evaporative, thereby stably treating highly concentrated wastewater at low cost. CONSTITUTION: The method comprises the steps of evaporating wastewater to separate the wastewater into moisture and slurry; collecting the slurry at a lower part of an evaporator(1) and vapor at an upper part of the evaporator(1); transferring the slurry to a slurry tank(5); drying the slurry and discharging solids generated by drying the slurry via a drain valve(7'); condensing the vapor generated from the evaporator(1) and the dryer(4) by a condenser(2), thereby obtaining the condensate; sucking remained air and no condensed gas to a vacuum tank(20,20') via a pipe by a pressure generated by a water ejector(8,8'), thereby evacuating inside of the evaporator(1) and the dryer(4); and transferring the no condensed gas and circulation water in the water ejector(8,8') to a complex treatment device.

Description

워터 이젝터가 부착된 진공증발농축 건조 방법 {method of evaporatoring for vacuum evaporator}Vacuum evaporator drying method with water ejector {method of evaporatoring for vacuum evaporator}

본 발명은 본원 출원인에 의한 특허 출원 등록 제032428호 "고농도 혼합 폐수의 복합 처리방법" 및 특허출원 등록 제 026044호 "진공증류법에 의한 폐수처리방법)에 적용하여 사용 할 수 있는 고농도의 혼합 폐수를 처리하기 위한 워터 이젝터가 부착된 진공증발농축 건조 방법 및 장치에 관한 것으로서, 특히 고동도의 원폐수를 처리하기 위하여 종래의 진공증발농축 장치에 워터 이젝터와 진공 탱크를 설치 연결하여 전체의 시스템을 진공 상태를 유지하며 폐수가 농축, 증발, 응축 및 건조 과정을 거치며 폐수 속에 함유되어 있는 물 이외의 고형분을 경제적이고 안정적으로 분리 할 수 있는 워터 이젝터가 부착된 진공증발 농축 건조 시스템에 관한 것이다.The present invention uses a high concentration of mixed wastewater that can be applied to patent application registration No. 032428 "Compound treatment method of high concentration mixed wastewater" and Patent Application Registration No. 026044 "Wastewater treatment method by vacuum distillation method" The present invention relates to a vacuum evaporation concentration drying method and apparatus equipped with a water ejector for treatment, and in particular, a water ejector and a vacuum tank are installed and connected to a conventional vacuum evaporation concentrator to treat high-frequency raw wastewater. The present invention relates to a vacuum evaporation concentrated drying system equipped with a water ejector that maintains a state, and wastewater undergoes concentration, evaporation, condensation and drying processes, and economically and stably separates solids other than the water contained in the wastewater.

일반적으로 사용되어지고 있는 고농도 폐수처리 설비로는 압축된 토출 증기를 공정의 가열원으로 재 사용하는 TVR식 증발농축기, 증기를 재압축하여 사용하는 MVR식 증발농축기 및 다중효용 증발농축기등 다양한 농축기가 상용화되어 사용되고있다.Generally used high concentration wastewater treatment facilities include various concentrators such as TVR type evaporator which uses compressed discharge steam as heating source of process, MVR type evaporator which recompresses steam, and multi-effect evaporator. It is commercially available.

상기와 같이 일반적으로 많이 사용되고 있는 거의 대부분 폐수처리 장치는 고농도 폐수 처리시 폐수를 감압식 증발 농축기를 이용하여 오염물질과 응축수를 분리한 후 농축액은 건조장치로 이송하여 증발 응축공정을 통해 수분을 증발 시킨 후 상기 응축공정 후에 발생되는 고형화 슬러지를 별도로 인출하여 처리 하였다.Most of the wastewater treatment devices generally used as described above are used to separate contaminants and condensate using a pressure-sensitive evaporator to treat wastewater at high concentrations, and then concentrates are transferred to a drying device to evaporate water through an evaporative condensation process. Then, the solidified sludge generated after the condensation process was separately taken out and treated.

상기 농축액을 건조 시키는 건조 장치로 가장 널리 사용되어지는 건조장치로는 폐들형 건조기, 리터액형 건조기 및 로타디스크형 건조기 등이 있으며 이러한상기 증발 농축기나 건조기는 에너지 절약과 시스템 구조상 진공 펌프를 이용하여 감압상태에서 가동을 해야만 그 효율성이 증대된다.Drying apparatuses which are most widely used as a drying apparatus for drying the concentrate are waste type dryers, liter liquid dryers, and rotadisk type dryers. The evaporative concentrators or dryers are reduced in pressure by using a vacuum pump due to energy saving and system structure. The efficiency is increased only when operating in the state.

이러한 상기 증발 농축기와 건조기의 특성 때문에 증발 농축기와 건조기의 진공 유지를 위해 수봉식 진공펌프나 유봉식 진공 펌프를 가장 많이 사용하고 있지만 상기 수봉식 진공펌프 및 유봉식 진공펌프는는 실린더 내부의 액체의 온도에 따라 펌프안의 진공도가 달라짐을 물론 급수 및 폐수처리를 위한 부대 시설을 따로 구비해야 한다는 문제점이 있다.Due to the characteristics of the evaporator and dryer, a sealed vacuum pump or a sealed vacuum pump is most often used to maintain the vacuum of the evaporative concentrator and the dryer. However, the sealed vacuum pump and the sealed vacuum pump are used in the pump according to the temperature of the liquid inside the cylinder. Of course, there is a problem in that a separate facility for water supply and wastewater treatment is provided, as well as the degree of vacuum.

또한 상기 수봉식 진공 펌프 및 유봉식 진공 펌프는 펌프의 내부로 가스등 폐수 속의 여러 가지 유해 성분에 의해 펌프의 내부가 부식되고 상기 펌프의 내부 부식으로 인해 일정 기간 사용 후 펌프를 교체해야 한다는 문제점이 있다.In addition, the sealed vacuum pump and the sealed vacuum pump have a problem in that the inside of the pump is corroded by various harmful components in the wastewater such as gas into the inside of the pump, and the pump needs to be replaced after a certain period of time due to internal corrosion of the pump.

이러한 수봉식 진공 펌프 및 유봉식 진공펌프의 문제점 및 경제성 때문에 일반적인 진공 펌프를 사용하는 폐수처리장치도 있지만 이러한 일반 진공 펌프의 경우 폐수의 증발시 수분과 함께 폐수의 성상에 따라 불응축 가스도 함께 증발하여 진공 펌프의 임펠러 및 케이싱 부에 스케일이 형성되어 정상적인 진공도를 유지 할 수 없을 뿐만 아니라 진공을 유지하기 위한 씰수가 외부에서 계속적으로 공급되어야만 한다.Due to the problems and economics of the sealed and pumped vacuum pumps, there is also a wastewater treatment apparatus using a general vacuum pump. However, in the case of such a general vacuum pump, a non-condensable gas is evaporated together with moisture when the wastewater evaporates. Scales are formed in the impeller and casing of the pump to maintain the normal degree of vacuum, and the seal water to maintain the vacuum must be continuously supplied from the outside.

또한 진공 유지가 끝난 씰수에는 폐수에서 증발된 불응축 가스등과 같은 오염 물질이 혼합되어 배출되기 때문에 배출된 폐수는 수질오염 방지를 위해 재처리를 해야 하는 문제점이 있다.In addition, since the seal water is maintained in a vacuum, the pollutants such as non-condensable gas evaporated from the waste water are mixed and discharged, so the discharged waste water has to be reprocessed to prevent water pollution.

따라서 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 종래에 사용되어지는 진공증발 및 건조장치에 워터 이젝터와 진공 탱크를 설치 연결하여 전체 폐수 처리 공정을 진공 상태에서 진행 할 수 있도록 하였으며 원폐수가 증발 농축기의 열교환기에서 발생하는 스팀에 의해 가열된 후 세퍼레이터에 분사되면 폐수속에 수분이 증발되어 냉각 콘덴서로 이송되고 냉각 콘덴서에서 이동된 증기 속의 수분은 쿨링 타워의 냉각수에 의해 냉각응축되어 응축수 탱크에 저장되고 응축되지 않은 잔류공기와 불응축 가스는 워터 이젝터에 의해 강제로 진공 탱크에 흡입되어 시스템을 진공화 시킴으로 경제적이고 안정적으로 폐수를 처리 할 수 있는 워터 이젝터가 부착된 진공증발농축 건조장치를 제공함에 그 목적이 있다.Therefore, the present invention is to install the water ejector and the vacuum tank to the vacuum evaporation and drying apparatus used in the prior art in order to solve the conventional problems as described above to proceed the entire wastewater treatment process in a vacuum state and When heated by steam generated in the heat exchanger of the evaporator and injected into the separator, water is evaporated in the waste water and transferred to the cooling condenser, and the water in the steam moved from the cooling condenser is cooled and condensed by the cooling water of the cooling tower to the condensate tank. The stored and uncondensed residual air and non-condensable gas are forced into the vacuum tank by the water ejector to evacuate the system to provide a vacuum evaporation concentrated drying device equipped with a water ejector that can treat wastewater economically and stably. Has its purpose.

도 1은 본 발명에 의한 진공증발 농축건조 방법의 전체 공정을 나타낸 전체 공정도1 is a whole process diagram showing the overall process of the vacuum evaporation concentrated drying method according to the present invention

※도면의 주요 부호에 대한 설명※※ Description of the major symbols in the drawings ※

1: 농축기2:콘덴서1: concentrator 2: condenser

3: 저장조 4: 건조기3: reservoir 4: dryer

5: 농축액 저장 탱크 6: 응축수 탱크5: concentrate storage tank 6: condensate tank

7 7': 에어 컴프레셔, 드레인 밸브8, 8': 워터 이젝터7 7 ': Air compressor, drain valve 8, 8': Water ejector

9; 가열기 10: 냉각탑9; Burner 10: Cooling Tower

11, 11': 응축수 펌프 12, 12': 농축액 이송 펌프11, 11 ': condensate pump 12, 12': concentrate transfer pump

13: 순환 펌프15: 냉각수 펌프 16, 16': 농축액 이송 파이프17, 17': 물 이송관 18: 농축가스 이송관19: 응축수 이송관20, 20': 진공 탱크DESCRIPTION OF SYMBOLS 13: Circulating pump 15: Cooling water pump 16, 16 ': Concentrated liquid conveying pipe 17, 17': Water conveying pipe 18: Concentrated gas conveying pipe 19: Condensate conveying pipe 20, 20 ': Vacuum tank

상기 목적을 달성하기 위하여 본 발명은 외부에서 유입되는 소정의 폐수를 농축 할 수 있는 농축기(1)와; 상기 농축기에서 농축된 농축액을 공급하기 위한 농축액 이송펌프(12)와; 상기 농축기(1)를 거친 농축액을 저장 할 수 있는 농축액 저장 탱크(5)와; 상기 농축액 저장 탱크(5)에 저장되어 있는 농축액의 일정량을 건조기(4)로 공급 해 주는 농축액 이송 펌프(12, 12')와; 상기 농축액 이송 펌프(12,12')에 의해 공급된 농축액의 농축 정도를 감지하여 동력제어 기능을 수행하는 검출센서 및 외부 표식 기능의 디스플레이 수단을 포함하는 건조기(4)와; 상기 건조기(4)의 하단부에 설치되어 고형물 슬러지가 배출 될 수 있도록 에어 컴프레셔(7)와 연결된 드레인 밸브와; 상기 건조기(4)에서 발생된 가스를 응축 시키기 위한 콘덴서(2)와; 상기 콘덴서(2)를 거친 응축수를 저장하기 위한 응축수 탱크(6)와; 상기 콘덴서(2,2') 미처 응축되지 않은 불응축 가스를 흡입 할 수 있는 워터 이젝터(8)가 구비된 진공 탱크(20)를 설치한다.In order to achieve the above object, the present invention provides a concentrator (1) capable of concentrating predetermined wastewater introduced from the outside; Concentrate transfer pump 12 for supplying the concentrated liquid concentrated in the concentrator; A concentrate storage tank (5) capable of storing the concentrate passed through the concentrator (1); A concentrated liquid transfer pump (12, 12 ') for supplying a predetermined amount of the concentrated liquid stored in the concentrated liquid storage tank (5) to the dryer (4); A dryer (4) comprising a detection sensor for detecting the concentration of the concentrate supplied by the concentrate transfer pump (12, 12 ') and performing a power control function and a display means for displaying an external mark function; A drain valve installed at a lower end of the dryer 4 and connected to an air compressor 7 to discharge solid sludge; A condenser (2) for condensing the gas generated in the dryer (4); A condensate tank (6) for storing condensate having passed through the condenser (2); The condenser (2,2 ') is provided with a vacuum tank (20) equipped with a water ejector (8) capable of sucking non-condensed non-condensable gas.

본 발명은 도면에 따라 더욱 상세히 설명한다.The invention is explained in more detail according to the drawings.

도 1은 본 발명에 의한 진공증발 농축건조 방법 및 장치의 전체 공정을 나타낸 전체 공정도이다.1 is an overall process diagram showing the overall process of the vacuum evaporation concentrated drying method and apparatus according to the present invention.

외부에서 유입되는 소정의 폐수를 상기 농축기에서 1차적으로 증발 응축 시키고 수분이 80~90%정도 빠진 농축액은 농축기(1)의 하단부에 형성되어 있는 농축액 이송 펌프(12)에 의해 농축액 이송 파이프(16,16')을 따라 농축액 저장 탱크(5)로 이송되고, 농축액 저장 탱크(5)에 저장된 농축액 속의 잔여 수분을 건조 시키기 위하여 농축액 저장 탱크(5)의 하단부에 설치되어 있는 농축액 이송 파이프(16,16')를 통해 건조기로 이송되어진다.The concentrated wastewater introduced from the outside is evaporated and condensed primarily in the concentrator, and the concentrated liquid having about 80 to 90% of water is concentrated by the concentrate conveying pump 12 formed at the lower end of the concentrator 1. 16 ') is transferred to the concentrate storage tank 5, and the concentrate transfer pipe 16, which is installed at the lower end of the concentrate storage tank 5 for drying the residual water in the concentrate stored in the concentrate storage tank 5, 16 ') to the dryer.

상기 건조기(4)와 농축기(1)로 이송된 농축액는 건조기(4)와 농축기(1) 내부에서 다 시 건조되고 건조시에 발생하는 고형물 슬러지는 건조기(4)의 하단부에 설치되어 고형물 슬러지가 배출 될 수 있도록 에어 컴프레셔(7)와 연결된 드레인 밸브(7')로 배출되고 상기 농축기와 건조기에서 증발된 증기는 증기 이송관을 통해 건조기와 농축기(1) 상단부에 설치되어 있는 냉각 콘덴서(2, 2')로 이송되어 진다.The concentrated liquid transferred to the dryer 4 and the concentrator 1 is dried again in the dryer 4 and the concentrator 1, and the solid sludge generated during drying is installed at the lower end of the dryer 4 so that the solid sludge is discharged. The steam discharged to the drain valve 7 'connected to the air compressor 7 and evaporated from the condenser and the dryer is installed at the upper end of the condenser and the condenser 1 through a steam conveying pipe. It is transferred to ').

상기 냉각 콘덴서(2, 2')로 이송되어진 증기는 냉각 콘덴서(2, 2')에서 냉각응축되어 응축수로 변환되고 변환되고 변환된 응축수는 냉각 콘덴서(2, 2') 하부에 설치되어 있는 응축수 이송관(19)을 통해 응축수 탱크(6)를 경유하여 저장조에 저장되게 된다.The steam transferred to the cooling condenser 2, 2 ′ is condensed by cooling condensation at the cooling condenser 2, 2 ′, converted into condensate, and the converted condensate is installed under the cooling condenser 2, 2 ′. It is stored in the reservoir via the condensate tank (6) through the transfer pipe (19).

또한 냉각 콘덴서(2, 2')에서 응축되지 않은 잔류공기와 불응축 가스는 워터 이젝터(8,8')의 물분사시의 압력에 의해 진공탱크(20,20') 내로 분사되는 물속에 흡착되게 되고 상기 워터 이젝터(8,8')의 작동시에 발생하는 압력에 의해 건조시에 발생하는 가스가 콘덴서(2, 2')로 이송됨으로 건조기(4) 내부를 진공화 시키게 되고 건조기(4) 내부에 남게되는 슬러지는 최종 수분함수율이 20%이하로 건조시켜 드레인 밸브(7')로 인출 후 처리하게 되며 상기 진공 탱크로 분사되었던 물은 오버 플로워 이송과을 통해 응축수 저장조로 이송된다.In addition, residual air and non-condensed gas that are not condensed in the cooling condenser 2 and 2 'are adsorbed into the water sprayed into the vacuum tanks 20 and 20' by the pressure of the water ejector 8 and 8 '. And the gas generated during drying is transferred to the condensers 2 and 2 'by the pressure generated during the operation of the water ejectors 8 and 8' to vacuum the inside of the dryer 4 and the dryer 4 The sludge remaining inside is dried to a final moisture content of 20% or less, taken out and treated by the drain valve 7 ', and the water injected into the vacuum tank is transferred to the condensate storage tank through the overflow transfer section.

따라서 본 발명은 고농도 폐수를 처리하기 위해 증발농축기와 건조기를 사용하게 되는데 증발농축기와 건조기의 시스템 내부를 진공화함으로 에너지를 절약 할 수 있다는 효과가 있다.Therefore, the present invention is to use the evaporator and dryer to treat the high concentration wastewater has the effect of saving energy by evacuating the system of the evaporator and dryer.

또 종래에는 시스템을 간소화 하기 위하여 필연적으로 진공 펌프를 사용하고 있으나 근래에 많이 사용되어지는 수봉식 진공 펌프와 유봉식 펌프는 폐수중에 배출되는 가스 및 독성물질과 오염물질로 펌프의 케이싱 및 임펠라에 스케일이 끼고 부식되어 효율이 떨어짐은 물론 상기 효율 저하로 인해 펌프의 수명이 단축됨과 동시에 일정기간 사용 후에는 고진공을 유지할 수 없으며 또 물과 기름을 계속해서 보충해줘야만 가동이 가능하기 때문에 경제적으로 많은 부담이되고 있다.In addition, conventionally, a vacuum pump is inevitably used to simplify the system, but the water-sealed vacuum pump and the oil-sealed pump, which are widely used in recent years, are scaled on the casing and impeller of the pump with gas, toxic substances and pollutants discharged from the wastewater The efficiency of the pump is reduced, and the efficiency of the pump is shortened due to the deterioration of the pump. At the same time, the high vacuum cannot be maintained after a certain period of use, and it is economically burdened because it can be operated only by continuously replenishing water and oil. .

반면 본 발명은 물 보충과 스케ㅔ일이 없이 고진공을 유지하면서 가동되기 때문에 유지 보수 비용이 경감된다는 효과가 있으며 고장이 거의 없기 때문에 매우 경제적이다.On the other hand, the present invention has the effect of reducing maintenance costs because it operates while maintaining a high vacuum without water replenishment and scale, and is very economical because there is almost no failure.

Claims (1)

폐수처리 증발농축, 건조 시스템에 있어서,In wastewater treatment evaporation and drying system, 외부 유입의 폐수를 증발시키고 상기 농축기에서 수분이 빠진 농축액은 농축기의 하단부에 형성되어 있는 농축액 이송 펌프에 의해 농축액 이송관을 따라 농축액 저장 탱크로 이송 시키는 1단계;Evaporating the waste water of the external inlet and the concentrated liquid is drained from the concentrator is transferred to the concentrate storage tank along the concentrate transfer pipe by the concentrate transfer pump formed in the lower end of the concentrator; 이송된 농축액을 수용하여 이를 건조처리하되, 건조시 발생된 고형물 슬러지는 드레인 밸브를 통해 외부로 배출되고, 증발 농축기와 건조기에서 증발된 증기는 냉각 콘덴서로 이송되어 액화 된 후 응축수로 전환되는 제2단계;Accepted and transferred to the concentrated liquid, the solid sludge generated during drying is discharged to the outside through the drain valve, the vapor evaporated from the evaporator and dryer is transferred to the cooling condenser is converted to condensate after the second step; 상기 냉각 콘덴서에서 불응축된 잔류공기와 불응축 가스는 워터 이젝터의 분사시 발생하는 압력에 의해 불응축 가스 이송관을 통해 강제적으로 진공 탱크에 흡입되어 농축기와 건조기의 내부가 진공화되는 제 3 단계; 및Residual air and non-condensed gas condensed in the cooling condenser is forcibly sucked into the vacuum tank through the non-condensed gas delivery pipe by the pressure generated during the injection of the water ejector to vacuum the interior of the concentrator and dryer ; And 상기 과정을 거쳐 진공탱크 내부의 워터 이젝터의 순환물과 불응축 가스를 수용하여 복합처리 장치로 이송시키는 제 4단계를 순차적으로 마련됨을 특징으로하는 워터 이젝터가 부착된 진공증발농축 건조 방법.And a fourth step of sequentially receiving the circulating water and the non-condensable gas of the water ejector in the vacuum tank and transferring the water to the complex processing apparatus.
KR10-2002-0057569A 2002-09-23 2002-09-23 method of evaporatoring for vacuum evaporator KR100449416B1 (en)

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