KR20050025291A - Method for removing white plume using water-cooling system - Google Patents
Method for removing white plume using water-cooling system Download PDFInfo
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- KR20050025291A KR20050025291A KR1020040076381A KR20040076381A KR20050025291A KR 20050025291 A KR20050025291 A KR 20050025291A KR 1020040076381 A KR1020040076381 A KR 1020040076381A KR 20040076381 A KR20040076381 A KR 20040076381A KR 20050025291 A KR20050025291 A KR 20050025291A
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- 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
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Abstract
Description
본 발명은 수냉식 백연 제거방법 및 장치에 관한 것으로서, 보다 상세하게는 수냉식 열교환기를 사용하여 백연현상을 제거하기 위한 수냉식 백연 제거방법 및 장치에 관한 것이다.The present invention relates to a water-cooled white smoke removal method and apparatus, and more particularly to a water-cooled white smoke removal method and apparatus for removing white smoke phenomenon using a water-cooled heat exchanger.
백연 현상(White Plume Phenomenon)이란, 수분을 함유하고 있는 배기가스가 연돌에서 배출되어 대기와 혼합, 확산될 때, 온도가 내려가 배기가스 중의 수증기가 노점(dew point)이하로 되면 결로하여 미세한 액적 상태로 되어 흰 연기처럼 보이는 현상을 말한다.White Plume Phenomenon refers to a fine droplet state when the exhaust gas containing moisture is discharged from the stack and mixed and diffused with the atmosphere, when the temperature drops and water vapor in the exhaust gas falls below the dew point. It is a phenomenon that looks like white smoke.
이러한 백연 발생의 주된 원인은 대부분 쓰레기의 소각시 발생되는 유해가스 및 보일러 등에서 발생되는 유해가스를 가스 세정기(Scrubber)를 이용하여 습식으로 제거하는 경우에 발생되는 것으로, 고온의 배기가스가 가스 세정기를 통과하면서 세정수와의 접촉으로 배기가스에 다량의 수분이 포함되어 수분의 농도가 높아짐과 동시에 배기가스가 냉각된 상태에서 대기중으로 배출되기 때문에 배기가스 중에 과포화 상태로 포함된 수분이 결노하여 백연이 발생되는 것이라 할 수 있다.The main reason for the generation of white smoke is generated when the harmful gases generated during incineration of wastes and harmful gases generated by boilers are wetly removed using a gas scrubber. As it passes through, it comes into contact with the washing water, and a large amount of moisture is contained in the exhaust gas, which increases the concentration of moisture and is discharged into the atmosphere while the exhaust gas is cooled. It can be said to occur.
따라서, 이러한 백연은 가스 세정기를 통과하면서 오염물질이 거의 제거된 상태이기 때문에 일상생활에서 특별한 피해는 없으나, 경관상 흰연기가 나는 것으스 보여 좋지 않으며, 비행장 주변에서 시계방해가 되고, 가시적으로 느껴지는 오염물질의 인식 차원에서 백연의 제거가 필요한 실정이다.Therefore, the white smoke has no special damage in daily life because the contaminants are almost removed while passing through the gas scrubber, but it is not good to see the white smoke in the landscape, and it becomes visible and disturbed around the airfield. In order to recognize pollutants, it is necessary to remove white lead.
한편, 기존의 사용중인 백연 제거방법으로는 배기가스 재가열법, 배기가스 수냉법, 배기가스 공냉법 및 디미스터(Demister)등이 알려져 있다.On the other hand, as a method of removing white smoke in use, an exhaust gas reheating method, an exhaust gas water cooling method, an exhaust gas air cooling method, and a demister are known.
이중 기존의 배기가스 수냉법은 배기가스의 온도를 수냉 콘덴서에 의해 냉각시키고, 콘덴서에 냉각용으로 사용된 냉각수는 일정 수온 유지를 위해 공냉식 냉각탑을 이용하여 냉각시킨 후 재공급하는 방법으로서, 이러한 방법은 배기가스 온도가 냉각탑 성능만큼 낮아져 수분을 응축 제거시킬 수 있는 반면에, 상기 냉각탑 통과 후의 배기가스 역시 해당온도에서 포화상태를 유지하고 있어 연돌에서 차가운 대기와의 접촉시 많은 응축수가 생성되어 주변을 오염시키고, 백연 역시 보이게 된다. 또한, 냉각수의 온도를 낮추기 위하여 사용되는 공냉식 냉각탑 등과 같은 부대시설이 많아 설비비가 많이 소요되고, 그 소요면적이 큰 단점이 있는 한편 효율이 낮은 문제점이 있었다.The existing exhaust gas water cooling method is a method in which the exhaust gas temperature is cooled by a water cooling condenser, and the cooling water used for cooling the condenser is cooled by using an air-cooled cooling tower to maintain a constant water temperature and then resupplied. While the exhaust gas temperature is lowered as much as the cooling tower performance, the exhaust gas after condensation can be condensed out, while the exhaust gas after the cooling tower is also kept saturated at the corresponding temperature. It pollutes, and white smoke is also visible. In addition, there are many facilities such as air-cooled cooling towers used to lower the temperature of the cooling water, a lot of equipment costs, there is a problem that the required area has a large disadvantage and low efficiency.
본 발명의 목적은 상기와 같은 문제점을 해결하기 위한 것으로서, 수냉식 열교환기를 이용하고, 습식세정탑에서 배기가스 냉각을 위해 사용되는 순환수를 재활용하여 배가가스로 인한 백연현상을 억제하고 가시적인 공해요소를 해소하기 위한 수냉식 백연 제거방법 및 장치를 제공하고자 하는 것이다. An object of the present invention is to solve the above problems, by using a water-cooled heat exchanger, recycling the circulating water used for cooling the exhaust gas in the wet washing tower to suppress the white smoke phenomenon due to the doubling gas and visible pollution factor It is to provide a water-cooled white smoke removal method and apparatus for solving the problem.
상기 목적을 달성하기위한 본 발명의 수냉식 백연 제거방법은 배기가스가 배출시설(10)에서 팬(20)을 통하여 습식세정탑(30)내로 유입되고, 유입파이프(31)를 통하여 공급되는 순환수는 분무노즐(32)에 의해 상기 습식세정탑(30)내의 배기가스를 냉각시키는 배기가스 유입단계; 외기공기가 송풍기(40)에 의해 유입덕트(41)를 통하여 열교환기(50)로 유입되는 외기공기 유입단계; 상기 열교환기(50)내에서 습식세정탑(30)으로 부터 유입된 순환수와 상기 외기공기 사이에 열교환이 일어나는 열교환 단계; 유입덕트(61)를 통하여 상기 습식세정탑(30)에서 연돌(60)로 유입된 배기가스와 상기 외기공기가 혼합되어 연돌(60)을 통하여 공기중으로 배출되는 배출단계를 포함하는 것을 특징으로 한다.In the water-cooled white smoke removal method of the present invention for achieving the above object, the exhaust gas is introduced into the wet scrubbing tower 30 through the fan 20 in the discharge facility 10, and the circulating water supplied through the inlet pipe 31. The exhaust gas inlet step of cooling the exhaust gas in the wet cleaning tower 30 by the spray nozzle 32; An outside air inflow step in which the outside air flows into the heat exchanger 50 through the inflow duct 41 by the blower 40; A heat exchange step in which heat exchange occurs between the circulating water introduced from the wet cleaning tower 30 and the outside air in the heat exchanger 50; It characterized in that it comprises a discharge step in which the exhaust gas introduced into the stack 60 from the wet cleaning tower 30 through the inlet duct 61 and the outside air is mixed and discharged into the air through the stack 60. .
여기에서, 상기 순환수는 상기 습식세정탑(30)의 펌프(33)에 의해 유입파이프(34)를 통하여 상기 열교환기(50)의 핀튜브(51)로 유입되어 상기 외기공기와 열교환이 일어난 후, 다시 순환파이프(35)를 통해 습식세정탑(30)으로 돌아가 순환하는 것을 특징으로 한다.Here, the circulating water is introduced into the fin tube 51 of the heat exchanger 50 through the inlet pipe 34 by the pump 33 of the wet washing tower 30 to exchange heat with the outside air. After that, it is characterized by circulating back to the wet washing tower 30 through the circulation pipe (35).
또한, 본 발명에 의한 수냉식 백연 제거장치는 배기가스를 배출하는 배출시설(10); 상기 배출시설(10)의 출구에 위치하며, 팬(20)을 통하여 유입된 배기가스를 분무노즐(32)을 통하여 미세입자로 분사되는 순환수로 냉각시키는 습식세정탑(30); 냉각용 외부공기를 강제로 유입하기 위한 송풍기(40); 상기 송풍기(40)의 출구에 위치하며, 상기 습식세정탑(30)에서 펌프(33)에 의해 유입파이프(34)를 통하여 핀튜브(51)로 유입되는 순환수와 상기 송풍기(40)로 부터 유입덕트(41)를 통해 유입된 외기공기 사이에 열교환이 일어나는 열교환기(50); 상기 열교환기(50)에서 열교환이 일어나 냉각된 순환수를 다시 습식세정탑(30)으로 전달하는 순환파이프(35); 상기 습식세정탑(30)에서 유입덕트(61)를 통하여 유입된 포화수분을 함유한 배기가스와 상기 열교환기(50)에서 승온건조된 외기가스가 혼합되어 상기 배기가스의 절대습도를 저하시키는 연돌(60)을 포함하는 것을 특징으로 한다.In addition, the water-cooled white smoke removal apparatus according to the present invention comprises a discharge facility for discharging the exhaust gas (10); Located at the outlet of the discharge facility 10, the wet cleaning tower 30 for cooling the exhaust gas introduced through the fan 20 with the circulating water injected into the fine particles through the spray nozzle 32; A blower 40 for forcibly introducing external air for cooling; Located at the outlet of the blower (40), the circulating water flowing into the fin tube (51) through the inlet pipe (34) by the pump 33 in the wet washing tower 30 and from the blower (40) A heat exchanger 50 in which heat exchange occurs between the outside air introduced through the inlet duct 41; Circulating pipes 35 for heat exchange in the heat exchanger 50 to transfer the cooled circulating water back to the wet cleaning tower 30; In the wet scrubbing tower 30, the exhaust gas containing the saturated water introduced through the inlet duct 61 and the outdoor air gas heated in the heat exchanger 50 are mixed to reduce the absolute humidity of the exhaust gas. It characterized by including (60).
이하, 도면을 참조하여 본 발명을 보다 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 수냉식 백연 제거방법을 개략적으로 도시한 도면이고, 도 2는 본 발명에 따른 수냉식 백연 제거장치를 도시한 도면이다.1 is a view schematically showing a water-cooled white smoke removal method according to the present invention, Figure 2 is a view showing a water-cooled white smoke removal apparatus according to the present invention.
본 발명에 의한 수냉식 백연 제거방법은 크게 배기가스 유입단계, 외기공기 유입단계, 열교환 단계 그리고 배출단계로 구성된다.Water-cooled white smoke removal method according to the present invention is largely composed of exhaust gas inlet step, outside air inlet step, heat exchange step and discharge step.
먼저, 배기가스 유입단계는 배출시설(10)에서 배출되는 배기가스가 팬(Fan)(20)을 통하여 습식세정탑(30)으로 유입되고, 또한 유입파이프(31)에 의해서 상기 습식세정탑(30)내로 공급되는 약품이 첨가된 순환수는 분무노즐(32)을 통하여 미세입자로 분사되면서 배스가스 내에 함유된 오염물질을 흡수 제거함과 동시에 배기가스를 냉각시킨다.First, in the exhaust gas inflow step, the exhaust gas discharged from the discharge facility 10 is introduced into the wet cleaning tower 30 through a fan 20, and the wet cleaning tower is introduced by the inlet pipe 31. The circulating water to which the chemicals supplied are added is sprayed into the fine particles through the spray nozzle 32 to absorb and remove the contaminants contained in the bath gas and simultaneously cool the exhaust gas.
이때, 상기 습식세정탑(30)에서 오염물질이 제거된 배기가스는 과포화된 수분을 포함하고 있으며, 상기 습식세정탑(30)의 출구에서 직접 대기중으로나 연돌을 통하여 배기가스가 배출되는 경우에 다량의 수증기인 백연이 배출되는 것이다.At this time, the exhaust gas from which the pollutants have been removed from the wet cleaning tower 30 includes supersaturated water, and when exhaust gas is discharged directly from the outlet of the wet cleaning tower 30 to the atmosphere or through a stack. A large amount of water vapor, white lead, is emitted.
다음, 외기공기 유입단계는 외기공기를 강제로 유입하기 위한 송풍기(40)를 통하여 외기공기가 유입덕트(41)에 의해 열교환기(50)로 유입되고, 상기 열교환기(50)내에서는 상기 습식세정탑(30)으로 나온 순환수와 상기 외기공기 사이에 열교환이 일어난다.Next, in the inlet air inlet step, the inlet air is introduced into the heat exchanger 50 by the inlet duct 41 through the blower 40 for forcibly introducing the inlet air, and the wet air in the heat exchanger 50 is Heat exchange occurs between the circulating water exiting the scrubber 30 and the outside air.
이때, 상기 순환수는 상기 습식세정탑(30)의 펌프(33)에 의해 유입파이프(34)를 통하여 상기 열교환기(50)의 핀튜브(51)로 유입되어져 상기 외기공기와 열교환을 일으켜 상기 외기공기를 승온시키는 역할을 하고, 그 후에 다시 순환파이프(35)를 거쳐 습식세정탑(30)으로 돌아간다.At this time, the circulating water is introduced into the fin tube 51 of the heat exchanger 50 through the inlet pipe 34 by the pump 33 of the wet washing tower 30 to exchange heat with the outside air. It serves to heat up the outside air, and then returns to the wet cleaning tower 30 through the circulation pipe 35 again.
상기 과정에서 외기공기를 승온시킬 때 빼앗긴 열량으로 인해 냉각되어진 상기 순환수는 습식세정탑(30) 내의 순환되는 물의 온도를 떨어뜨리며, 이로 인해 포화상태의 배기가스는 온도가 떨어진 상기 순환수에 의해 냉각 및 응축되어 절대습도가 낮아지게 된다.The circulating water cooled due to the amount of heat deprived when heating the outside air in the process lowers the temperature of the water circulated in the wet scrubbing tower 30, whereby the exhaust gas in a saturated state is caused by the circulating water whose temperature is lowered. Cooling and condensation will lower the absolute humidity.
다음, 포화수분을 함유한 상기 배기가스는 유입덕트(61)를 통하여 상기 습식세정탑(30)에서 연돌(60)내로 유입되게 되고, 상기 순환수의 냉각시 사용되어 승온된 상기 외기공기와 완전 혼합되어 상기 혼합된 배기가스의 절대습도 및 온도의 교차점이 백연발생 한계선 이내에 형성되므로 연돌(60)을 통하여 배출될 때에는 백연이 보이지 않게 된다.Next, the exhaust gas containing saturated water is introduced into the stack 60 in the wet scrubbing tower 30 through the inlet duct 61, and is completely used to cool the circulating water and the temperature of the outside air. Since the intersection point of the absolute humidity and the temperature of the mixed exhaust gas is mixed within the white smoke generation limit line, white smoke is not visible when discharged through the stack 60.
이하, 실시예를 통하여 본 발명을 보다 구체적으로 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to Examples.
도 2에 도시된 것과 같은 백연 제거장치를 이용하여 상대습도 70%, 외기온도 -5℃의 조건에서 실험을 실시하였다.Using a white smoke removal device as shown in Figure 2 was carried out under the conditions of relative humidity 70%, ambient temperature -5 ℃.
먼저, 배출시설(10)에서 배기가스를 발생시키고, 상기 배기가스를 팬(Fan)(20)을 통하여 습식세정탑(30)으로 유입하여, 상기 습식세정탑(30)내로 공급되는 순환수로 상기 배기가스를 냉각한다.First, the exhaust gas is generated in the discharge facility 10, the exhaust gas is introduced into the wet cleaning tower 30 through a fan 20, and the circulation water is supplied into the wet cleaning tower 30. Cool the exhaust gas.
그리고, 냉각용 외기공기는 송풍기(40)에 의해 유입덕트(41)를 거쳐 열교환기(50)의 하부 방향으로 유입된다.The outside air for cooling is introduced into the lower direction of the heat exchanger 50 through the inlet duct 41 by the blower 40.
상기 외기공기는 상기 열교환기(50)내에서 상기 습식세정탑(30)으로 나온 순환수와 열교환이 일어나, 상기 순환수는 외기공기를 승온시킴으로서 냉각되어져 다시 상기 습식세정탑(30)으로 돌아간다.The outside air exchanges heat with the circulating water from the wet scrubbing tower 30 in the heat exchanger 50, and the circulating water is cooled by heating up the outside air to return to the wet scrubbing tower 30. .
이때, 상기 순환수는 1547ton/h의 속도로 흐르며, 열교환기 입구(F)에서의 온도는 48℃이고, 열교환기 출구(G)에서의 온도는 39℃이다.At this time, the circulating water flows at a rate of 1547 ton / h, the temperature at the heat exchanger inlet F is 48 ° C, and the temperature at the heat exchanger outlet G is 39 ° C.
따라서, 다시 습식세정탑(30)으로 돌아가는 상기 냉각된 순환수는 습식세정탑(30)내의 순환되는 물의 온도를 떨어뜨려 상기 배기가스를 냉각 및 응축시켜 절대습도를 낮아지게 한다.Thus, the cooled circulating water back to the wet scrubber 30 lowers the temperature of the water circulated in the wet scrubber 30 to cool and condense the exhaust gas, thereby lowering the absolute humidity.
그리고, 상기 열교환기(50)를 통과하면서 건조하고 승온된 외기공기는 연돌(60)에서 다습한 배기가스와 완전 혼합되어 대기중으로 확산된다.In addition, the outside air, which is dried and heated while passing through the heat exchanger 50, is completely mixed with the humid exhaust gas in the stack 60 and diffused into the atmosphere.
본 실험에서 습식세정탑 입구의 배기가스(A), 습식세정탑 출구의 배기가스(B), 열교환기 통과전 외기공기(C), 열교환기 통과후 외기공기(D), 연돌 통과후 혼합가스(E)에서의 각각의 상태를 측정한 실험결과가 아래 표 1과 같다.In this experiment, the exhaust gas (A) at the inlet of the wet scrubbing tower, the exhaust gas (B) at the outlet of the wet scrubbing tower, outside air (C) before passing through the heat exchanger, outside air (D) after passing through the heat exchanger, and mixed gas after passing through the stack The experimental results of measuring each state in (E) are shown in Table 1 below.
상기 표 1의 실험결과에서 알 수 있듯이, 냉각용 외기공기와 배기가스가 서로 섞여 연돌(60)을 통과한 혼합가스는 절대습도가 0.0172kg/kg'로 건조한 상태이므로, 연돌(60)의 배출구에서 백연이 발생되지 않았다.As can be seen in the experimental results of Table 1, the mixed gas passed through the stack 60 by mixing the cooling air and the exhaust gas with each other, the absolute humidity is dried at 0.0172kg / kg ', the outlet of the stack 60 White smoke did not occur in.
즉, 상기 표 1의 측정값을 그래프에 나타낸 것이 도 3에 도시되어 있으며, 연돌(60)에서의 배출조건이 외기 온도 -5℃, 상대습도 70%시 백연한계선 이내에 있으므로 백연이 발생하지 않는다.That is, the measured values of Table 1 are shown in the graph shown in FIG. 3, and white smoke does not occur because the discharge condition in the stack 60 is within the white smoke limit line at an outdoor temperature of −5 ° C. and a relative humidity of 70%.
본 발명에 따른 수냉식 백연 제거방법에 의하면, 열교환기에서 외기공기와의 열교환에 의해 냉각되는 순환수를 습식세정탑에서 배가가스를 냉각하는데 재활용하여 사용함으로서, 넓은 공간이 필요하지 않으며, 경제적으로 요구되는 설치비용 및 운용비용을 절감하여 보다 효율적으로 백연을 제거할 수 있다는 장점이 있다.According to the water-cooled white smoke removal method according to the present invention, by using the recycled water cooled by the heat exchange with the outdoor air in the heat exchanger to cool the doubling gas in the wet washing tower, a large space is not required, economically required It is advantageous to remove white lead more efficiently by reducing installation cost and operating cost.
도 1은 본 발명에 따른 수냉식 백연 제거방법을 도시한 도면.1 is a view showing a water-cooled white smoke removal method according to the present invention.
도 2는 본 발명에 따른 수냉식 백연 제거장치를 도시한 도면.2 is a view showing a water-cooled white smoke removal apparatus according to the present invention.
도 3은 본 발명의 실시예에 따른 측정값을 나타낸 그래프.3 is a graph showing measured values according to an embodiment of the present invention.
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| KR101421885B1 (en) * | 2013-02-14 | 2014-07-28 | 한모기술주식회사 | The method of waste heat recovery from the low-temperature exhaust gas |
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