KR20070072642A - Apparatus for waste heat recovery of cogeneration desulfurization tower - Google Patents

Apparatus for waste heat recovery of cogeneration desulfurization tower Download PDF

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KR20070072642A
KR20070072642A KR1020060000011A KR20060000011A KR20070072642A KR 20070072642 A KR20070072642 A KR 20070072642A KR 1020060000011 A KR1020060000011 A KR 1020060000011A KR 20060000011 A KR20060000011 A KR 20060000011A KR 20070072642 A KR20070072642 A KR 20070072642A
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desulfurization tower
raw water
water
exhaust gas
cogeneration
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KR1020060000011A
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Korean (ko)
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KR100795735B1 (en
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우성률
김태만
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삼성정밀화학 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treating Waste Gases (AREA)

Abstract

A waste heat recovery apparatus of a cogeneration desulfurization tower is provided to reduce an amount of moisture contained in an exhaust gas, thereby reducing use of vapor. A waste heat recovery apparatus of a cogeneration desulfurization tower includes a housing(12), a circulation pump(14), a filler layer(15), and a heater(16). The housing has an introduction port(12a) and a discharge port(12b). The circulation pump pumps circulation water stored in a lower part of the housing to supply the circulation water to an injection nozzle installed at the upper part of the injection nozzle. The filler layer is installed under the injection nozzle to filter dusts and moistures The heater is mounted on the upper end of the housing. The introduction port is formed at the lower part of the housing to introduce the exhaust gas into the desulfurization tower.

Description

열병합 탈황탑의 폐열회수 장치{Apparatus for waste heat recovery of cogeneration desulfurization tower}Apparatus for waste heat recovery of cogeneration desulfurization tower

도 1은 본 발명에 따른 열병합 탈황탑의 폐열회수 장치를 나타내는 개략도.1 is a schematic view showing a waste heat recovery apparatus of the cogeneration desulfurization tower according to the present invention.

도 2는 본 발명에 따른 열병합 탈황탑을 나타내는 장치구성도.Figure 2 is a device configuration showing a cogeneration desulfurization tower according to the present invention.

도 3은 열병합 탈황탑의 백연방지의 원리를 나타내는 개념도.3 is a conceptual view showing the principle of smoke prevention of the cogeneration desulfurization tower.

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

10 : 탈황탑 11 : 보일러10: desulfurization tower 11: boiler

12 : 하우징 12a : 유입구12 housing 12a inlet

12b : 배출구 13 : 분사노즐12b: outlet 13: injection nozzle

14 : 순환파이프 15 : 충진층14 circulating pipe 15 filled layer

16 : 가열기 17 : 순환파이프16: heater 17: circulation pipe

18 : 유량제어밸브 19 : 열교환수단18: flow control valve 19: heat exchange means

20 : 원수조 21 : 원수펌프20: raw water tank 21: raw water pump

22a : 원수공급라인 22b : 리턴라인22a: Raw water supply line 22b: Return line

본 발명은 열병합 탈황탑의 폐열회수 장치에 관한 것으로서, 더욱 상세하게는 탈황탑 내부로 유입된 배출가스의 온도가 55~60℃로 냉각되어 포화증기 상태로 배출되도록 순환하는 순환수와 20℃이하의 차가운 원수를 열교환시킴으로써, 탈황탑에서 배출되는 가스 온도가 강하되고 배기가스에 포함되어 있는 수분의 양을 감소시켜 백연의 발생을 저감시키고, 상기 열교환에 의해 순환수의 폐열을 회수하여 원수의 온도를 높임으로써, 증기사용량을 절감하여 에너지 절약에 기여할 수 있도록 한 열병합 탈황탑의 폐열회수 장치에 관한 것이다.The present invention relates to a waste heat recovery apparatus of a cogeneration desulfurization tower, and more particularly, the temperature of the exhaust gas introduced into the desulfurization tower is circulated to circulate so that the temperature of the exhaust gas is cooled to 55 to 60 ° C and discharged in a saturated steam state. By heat-exchanging the cold raw water, the temperature of the gas discharged from the desulfurization tower is lowered, and the amount of moisture contained in the exhaust gas is reduced to reduce the generation of white smoke, and the waste heat of the circulating water is recovered by the heat exchange to recover the temperature of the raw water. By increasing the, it relates to a waste heat recovery apparatus of the cogeneration desulfurization tower to contribute to energy saving by reducing the steam consumption.

일반적으로, 보일러에서 배출되는 배기가스 중 유황성분은 탈황탑에서 탈황 후 대기로 배출되고, 대기로 배출되는 배기가스는 배출가스 중에 포함된 수분이 대기의 찬공기와 만나 작은 물방울로 변하면서 구름과 같은 모습으로 보여 시각적인 백연(白煙)현상을 유발시키는 문제가 있다.In general, the sulfur component of the exhaust gas discharged from the boiler is discharged to the atmosphere after desulfurization in the desulfurization tower, the exhaust gas discharged into the atmosphere meets the cold air of the atmosphere turns into small water droplets and clouds and There is a problem that causes the appearance of visual whitening (白煙) is seen in the same appearance.

즉, 상기 보일러에서 탈황탑로 유입되기 전 배출가스의 온도는 180~200℃이고, 배출가스가 탑황탑 내로 유입되면 스프레이를 통해 약품처리된 55~60℃의 순환수와 만나 포화증기 상태로 되고, 포화증기 상태의 배출가스가 대기로 배출되면 찬 공기와 만나 작은 물방울로 변하면서 백연현상이 발생하게 된다.That is, the temperature of the exhaust gas before entering the desulfurization tower in the boiler is 180 ~ 200 ℃, when the discharge gas is introduced into the tower sulfur tower meets the circulating water of 55 ~ 60 ℃ chemically treated through the spray to become saturated steam state In addition, when the exhaust gas of saturated steam is discharged to the atmosphere, it meets with cold air and turns into droplets, causing white smoke.

이와 같은 문제점을 해결하기 위해 상기 배출가스가 탈황탑에서 배출되기 직전에 열교환기의 증기로 배출가스를 가열하여 온도를 높임으로써, 도 3에 도시한 바와 같이, 단위 질량당 실제 체적을 최대화하여 배출 수증기(100)가 물방울로 형 성되기 전에 대기로 확산시켜 배출가스의 백연현상을 방지할 수 있다.In order to solve such a problem, the exhaust gas is heated by steam of a heat exchanger immediately before the exhaust gas is discharged from the desulfurization tower to increase the temperature, thereby maximizing the actual volume per unit mass as shown in FIG. 3. The water vapor 100 may be diffused into the atmosphere before being formed into water droplets to prevent the white smoke phenomenon of the exhaust gas.

그러나, 배출되는 배기가스의 온도를 높여 백연을 저감하는 것은 하절기 일부를 제외하고는 시각적으로 제거하기에 한계가 있다.However, reducing the white smoke by increasing the temperature of the exhaust gas is limited to remove it visually except in the summer.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로서, 탈황탑 내부로 유입된 배출가스의 온도가 55~60℃로 냉각되어 포화증기 상태로 배출되도록 순환하는 순환수와 20℃이하의 차가운 원수를 열교환시킴으로써, 순환수가 35~50℃로 강하되어 탈황탑에서 배출되는 포화상태의 가스 온도가 낮아지고 배기가스에 포함되어 있는 수분의 양을 감소시키고 백연의 발생을 최소화하여 기업의 친환경 이미지를 개선할 수 있고, 상기 열교환에 의해 순환수의 폐열을 회수하여 원수의 온도를 높임으로써, 승온된 원수를 각 공업용수로 사용하여 증기사용량을 절감할 수 있도록 한 열병합 탈황탑의 폐열회수 장치를 제공하는데 그 목적이 있다.The present invention has been made in view of the above point, the temperature of the exhaust gas introduced into the desulfurization tower is cooled to 55 ~ 60 ℃ to circulate to be discharged in a saturated steam state and cold raw water below 20 ℃ By exchanging heat, the circulating water drops to 35 ~ 50 ℃, lowering the temperature of saturated gas discharged from the desulfurization tower, reducing the amount of moisture contained in the exhaust gas, and minimizing the generation of white smoke, thereby improving the eco-friendly image of the company. And, by recovering the waste heat of the circulating water by the heat exchange to increase the temperature of the raw water, to provide a waste heat recovery device of the cogeneration desulfurization tower to reduce the steam consumption by using the elevated raw water as each industrial water. There is a purpose.

상기한 목적을 달성하기 위한 본 발명은 열병합 탈황탑의 폐열회수 장치에 있어서,The present invention for achieving the above object in the waste heat recovery apparatus of the cogeneration desulfurization tower,

보일러에서 배출된 배출가스 중 유황성분을 제거하는 탈황탑과; 상기 배출가스를 일정 온도의 포화증기상태로 강하시키는 순환수와; 상기 배출가스가 탈황탑에서 배출되기 전에 다시 일정 온도로 승온시키는 가열기와; 상기 순환수의 온 도를 낮게 하기 위해 열교환되는 공업용수의 원수(原水)를 저장하는 원수조와; 상기 원수와 순환수를 열교환시키는 열교환수단과; 상기 원수를 열교환수단에 공급하는 원수펌프;를 포함하여 구성된 것을 특징으로 한다.A desulfurization tower for removing sulfur components from the exhaust gas discharged from the boiler; Circulating water for dropping the exhaust gas into a saturated steam at a predetermined temperature; A heater for heating the exhaust gas back to a predetermined temperature before it is discharged from the desulfurization tower; A raw water tank for storing raw water of industrial water that is heat-exchanged to lower the temperature of the circulating water; Heat exchange means for heat-exchanging the raw water and the circulating water; It characterized in that it comprises a; raw water pump for supplying the raw water to the heat exchange means.

바람직한 구현예로서, 상기 탈황탑은: 측면 하단에 유입구가 형성되고 상단에 배출구가 형성된 하우징과; 상기 하우징의 하단에 일정한 온도로 약품처리되어 저장된 순환수와; 상기 유입구를 통해 하우징 내부에 유입된 보일러의 배출가스를 일정한 온도로 강하시키도록 상기 하우징 내부 상측에 설치되어 순환수를 분사하는 분사노즐과; 상기 분사노즐에 순환수를 제공하는 순환펌프; 를 포함하는 것을 특징으로 한다.In a preferred embodiment, the desulfurization tower includes: a housing having an inlet formed at a lower side of the side and an outlet formed at the top thereof; Circulating water that is chemically treated and stored at a constant temperature at the bottom of the housing; An injection nozzle installed above the housing to spray circulating water so as to lower the exhaust gas of the boiler introduced into the housing through the inlet to a predetermined temperature; A circulation pump providing circulation water to the injection nozzle; Characterized in that it comprises a.

더욱 바람직한 구현예로서, 상기 원수조는 원수펌프를 통해 상기 순환수보다 낮은 온도의 원수를 열교환수단에 제공하고, 상기 순환수와 열교환되어 승온된 원수를 다시 회수하여 각 공업용수로 사용하도록 한 것을 특징으로 한다.In a more preferred embodiment, the raw water tank is to provide the raw water of a lower temperature than the circulating water to the heat exchange means through the raw water pump, and to recover the raw water heated by heat exchange with the circulating water again to use each industrial water It features.

이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부한 도 1은 본 발명에 따른 열병합 탈황탑의 폐열회수 장치를 나타내는 개략도이고, 도 2는 본 발명에 따른 열병합 탈황탑을 나타내는 장치구성도이다.1 is a schematic view showing a waste heat recovery apparatus of a cogeneration desulfurization tower according to the present invention, and FIG. 2 is a device configuration diagram showing a cogeneration desulfurization tower according to the present invention.

본 발명은 열병합 탈황탑에서 배출되는 배출가스의 백연발생을 저감하고, 순환수의 폐열을 회수하는 장치에 관한 것이다.The present invention relates to a device for reducing the generation of white smoke of the exhaust gas discharged from the cogeneration desulfurization tower, and recovers the waste heat of the circulating water.

본 발명은 탈황탑의 배출가스의 온도를 강하시켜 배출가스 중 수분량을 줄여 백연발생을 최소화하고, 상대적으로 온도가 낮은 원수(原水)를 이용하여 탈황탑(10)의 내부를 순환하는 순환수와 열교환시킴으로써 순환수의 폐열을 회수하여 공 업용수로 사용할 수 있도록 한 점에 주안점이 있다.The present invention reduces the amount of water in the exhaust gas by lowering the temperature of the exhaust gas of the desulfurization tower to minimize the generation of white smoke, and the circulation water circulating the inside of the desulfurization tower (10) by using a relatively low temperature raw water (原 水) and The main focus is on the heat exchange to recover the waste heat of the circulating water so that it can be used as industrial water.

전술한 바와 같이, 탈황탑(10)은 보일러(11)에서 배출된 배출가스 중 유황성분을 탈황시킨 후 대기로 배출시킨다.As described above, the desulfurization tower 10 desulfurizes sulfur components in the exhaust gas discharged from the boiler 11 and discharges them to the atmosphere.

상기 탈황탑(10)은 유입구(12a) 및 배출구(12b)가 형성된 하우징(12)과, 하우징(12) 하단에 저장된 순환수와, 순환수를 펌핑하여 상부에 설치된 분사노즐(13)로 공급하는 순환펌프(14)와, 분사노즐(13) 하부에 가스의 먼지 및 미세수분을 여과시키도록 설치된 충진층(15)과, 하우징(12) 상단에 장착된 가열기(16)로 구성된다.The desulfurization tower 10 is supplied with a housing 12 having an inlet 12a and an outlet 12b, a circulating water stored at a lower end of the housing 12, and a pumped circulating water to an injection nozzle 13 installed at an upper portion thereof. It consists of a circulating pump 14, a filling layer 15 provided to filter the dust and fine water of the gas under the injection nozzle 13, and a heater 16 mounted on the housing 12.

상기 유입구(12a)는 보일러(11)에서 배출되는 배출가스 중 NOx가 제거된 후 탈황탑(10)의 내부로 유입되는 통로로서, 하우징(12)의 하부에 형성되고, 배출구(12b)는 하우징(12)의 상단에 수직방향으로 형성되어 이 배출구(12b)를 통해 탈황탑(10)의 내부로 유입된 배출가스 중 SOx가 제거된 후 배출되게 된다. 이때, 하우징(12) 내부에 유입된 배출가스의 온도는 약 180~200℃이다.The inlet 12a is a passage that flows into the desulfurization tower 10 after NOx is removed from the exhaust gas discharged from the boiler 11, and is formed under the housing 12, and the outlet 12b is formed in the housing. It is formed in the vertical direction at the upper end of the (12) is discharged after the SOx is removed from the exhaust gas introduced into the desulfurization tower 10 through this outlet (12b). At this time, the temperature of the exhaust gas introduced into the housing 12 is about 180 ~ 200 ℃.

상기 순환수는 약품처리되고 약 55~60℃의 온도가 유지되고, 하우징(12)의 하단에 일정량 저장되어 있다. The circulating water is chemically treated and maintained at a temperature of about 55-60 ° C., and is stored at a lower end of the housing 12.

상기 분사노즐(13)은 유입구(12a)의 상부에 위치하도록 순환수의 수위로부터 일정한 높이에 횡방향으로 설치되어 유입구(12a)를 통해 하우징(12)의 내부로 유입된 배출가스의 온도를 60℃의 포화증기 상태로 강하시킨다.The injection nozzle 13 is installed in the transverse direction at a constant height from the water level of the circulating water so as to be located above the inlet 12a to raise the temperature of the exhaust gas introduced into the housing 12 through the inlet 12a. It is dropped to saturated steam at ℃.

이때, 상기 분사노즐(13)의 하부에는 배출가스의 먼지 및 미세수분을 여과시키는 역할을 하는 충진층(15)이 횡방향으로 설치된다.At this time, the filling layer 15 that serves to filter the dust and fine water of the exhaust gas in the lower portion of the injection nozzle 13 is installed in the transverse direction.

상기 순환펌프(14)는 하우징(12)에 내부에 저장된 일정량의 순환수를 분사노즐(13)에 공급하여 계속해서 순환시키도록 펌핑하고, 하우징(12)의 저면과 분사노즐(13)을 연결하는 순환파이프(17)에 설치된다. 이때 순환파이프(17)에는 유량을 조절하는 유량제어밸브(18)가 설치되게 된다.The circulation pump 14 pumps a constant amount of circulation water stored therein in the housing 12 to the injection nozzle 13 to continuously circulate, and connects the bottom surface of the housing 12 to the injection nozzle 13. To the circulation pipe 17. At this time, the circulation pipe 17 is provided with a flow control valve 18 for adjusting the flow rate.

여기서, 본 발명은 상기 55~60℃의 순환수를 35~50℃로 강하시키기 위해 0~20℃이하의 원수(原水)와 열교환시키는 열교환수단(19)을 제공한다.Here, the present invention provides a heat exchange means 19 for heat exchange with the raw water of 0 ~ 20 ℃ or less in order to lower the circulating water of 55 ~ 60 ℃ to 35 ~ 50 ℃.

상기 열교환수단(19)은 플레이트형 열교환기로서, 0~20℃이하의 원수가 저장된 원수조(20)로부터 제공된 원수와 탈황탑(10)을 순환하는 순환수를 열교환하게 된다.The heat exchange means 19 is a plate type heat exchanger, and heat exchanges the circulating water circulating through the desulfurization tower 10 with raw water provided from the raw water tank 20 in which raw water is stored at 0 to 20 ° C. or less.

이로써, 상기 하우징(12)에 저장된 순환수의 온도를 55~60℃에서 35~50℃로 강하시키고, 하우징(12) 내부로 유입된 배출가스의 온도도 40~55℃로 강하되게 된다.As a result, the temperature of the circulating water stored in the housing 12 is lowered from 55 to 60 ° C to 35 to 50 ° C, and the temperature of the exhaust gas introduced into the housing 12 is also lowered to 40 to 55 ° C.

상기 원수조(20)는 저수지에서 급수되어 일정량을 저장하고, 이 저장된 원수의 온도는 6월에서 9월까지 4개월을 제외한 나머지 기간에는 20℃이하를 유지하게 되고, 이 차가운 원수는 원수펌프(21)에 의해 펌핑되어 원수공급라인(22a)을 통해 열교환수단(19)으로 유입되고, 순환수와 원수의 열교환을 통해 순환수는 55~60℃에서 35~50℃로 강하되고, 원수는 23~30℃로 승온된다.The raw water tank 20 is a water supply in the reservoir to store a certain amount, the temperature of the stored raw water is kept below 20 ℃ in the remaining period except for 4 months from June to September, this cold raw water is a raw water pump ( 21) is pumped into the heat exchange means 19 through the raw water supply line (22a), the circulating water is dropped from 55 ~ 60 ℃ to 35 ~ 50 ℃ through heat exchange between the circulating water and the raw water, the raw water is 23 It heats up at -30 degreeC.

상기 승온된 원수는 원수조(20)와 열교환수단(19)을 연결하는 리턴라인(22b)을 통해 원수조(20)로 다시 복귀하게 된다.The heated raw water is returned to the raw water tank 20 through the return line 22b connecting the raw water tank 20 and the heat exchange means 19.

또한, 상기 열교환수단(19)은 원수 및 순환수의 열교환을 위해 내부에 순환 수가 흐르는 순환파이프(17)의 일부를 공유하게 된다.In addition, the heat exchange means 19 share a part of the circulation pipe 17 through which the circulation water flows for heat exchange between the raw water and the circulation water.

상기 순환수의 온도강하에 의해 배출가스의 온도가 40~55℃로 강하되고 배가스에 함유된 수증기도 포화증기로 강하되어 배출가스 중 수분량이 19.6vol%에서 9.4vol%로 감소된 후, 하우징(12)의 상단에 설치된 가열기(16)에 의해 탈황탑(10)에서 배출되기 전에 배출가스가 80~90℃로 가열되게 되면, 단위 질량당 실제 체적이 최대화되어 배출 수증기가 물방울로 형성되기 전에 대기로 확산시켜 배출가스의 백연현상을 최소화하고 기업의 친환경 이미지를 향상시킬 수 있다.By the temperature drop of the circulating water, the temperature of the exhaust gas drops to 40-55 ° C., and the water vapor contained in the exhaust gas is also dropped into saturated steam so that the water content in the exhaust gas is reduced from 19.6 vol% to 9.4 vol%, and then the housing ( If the exhaust gas is heated to 80-90 ° C. before it is discharged from the desulfurization tower 10 by the heater 16 installed at the top of 12), the actual volume per unit mass is maximized and the atmosphere is discharged before the water vapor is formed into water droplets. By spreading this, it is possible to minimize the white smoke of the emission gas and improve the company's eco-friendly image.

또한, 6월 내지 9월을 제외한 20℃이하의 차가운 원수를 이용하여 상기 탈황탑(10)의 내부를 순환하는 순환수와 열교환에 의해 승온된 원수를 원수조(20)에 담아 공업용수로 재활용함으로써, 증기사용량을 줄이고 에너지 절감에 크게 기여할 수 있다.In addition, raw water heated by circulating water circulating inside the desulfurization tower 10 and heat exchanged by using cold raw water of 20 ° C. or lower except June to September is recycled as industrial water in raw water tank 20. By doing so, it is possible to reduce the steam consumption and greatly contribute to energy saving.

이상에서 본 바와 같이, 본 발명에 따른 열병합 탈황탑의 폐열회수 장치에 의하면, 상기 순환수의 온도강하에 의해 배출가스의 온도도 40~55℃의 포화증기로 강하되어 배출가스 중 수분량이 일정량 감소된 후, 하우징의 상단에 설치된 가열기에 의해 탈황탑에서 배출되기 전에 배출가스가 80~90℃로 가열되게 되면, 단위 질량당 실제 체적이 최대화되어 배출 수증기가 물방울로 형성되기 전에 대기로 확산시켜 배출가스의 백연현상을 최소화하고 기업의 친환경 이미지를 향상시킬 수 있다.As described above, according to the waste heat recovery apparatus of the cogeneration desulfurization tower according to the present invention, the temperature of the exhaust gas is also dropped to the saturated steam of 40 ~ 55 ℃ by the temperature drop of the circulating water to reduce the amount of water in the exhaust gas by a certain amount After the exhaust gas is heated to 80 ~ 90 ℃ before being discharged from the desulfurization tower by the heater installed at the top of the housing, the actual volume per unit mass is maximized to diffuse the exhaust water into the atmosphere before the water vapor is formed into water droplets. It can minimize the white smoke of gas and improve the company's green image.

또한, 6월 내지 9월을 제외한 0~20℃이하의 차가운 원수를 이용하여 상기 탈황탑의 내부를 순환하는 순환수와 열교환에 의해 승온된 원수를 원수조에 담아 공업용수로 재활용함으로써, 증기사용량을 줄이고 에너지 절감에 크게 기여할 수 있다.In addition, by using cold raw water of 0 ~ 20 ℃ or less except June to September, the raw water heated by the heat exchange with the circulating water circulating the inside of the desulfurization tower in the raw water tank to recycle the industrial water, Can greatly reduce energy consumption.

Claims (5)

열병합 탈황탑의 폐열회수 장치에 있어서,In the waste heat recovery device of the cogeneration desulfurization tower, 보일러에서 배출된 배출가스 중 유황성분을 제거하는 탈황탑과;A desulfurization tower for removing sulfur components from the exhaust gas discharged from the boiler; 상기 배출가스를 일정 온도의 포화증기상태로 강하시키는 순환수와;Circulating water for dropping the exhaust gas into a saturated steam at a predetermined temperature; 상기 배출가스가 탈황탑에서 배출되기 전에 다시 일정 온도로 승온시키는 가열기와;A heater for heating the exhaust gas back to a predetermined temperature before it is discharged from the desulfurization tower; 상기 순환수의 온도를 낮게 하기 위해 열교환되는 공업용수의 원수(原水)를 저장하는 원수조와;A raw water tank for storing raw water of industrial water that is heat-exchanged to lower the temperature of the circulating water; 상기 원수와 순환수를 열교환시키는 열교환수단과;Heat exchange means for heat-exchanging the raw water and the circulating water; 상기 원수를 열교환수단에 공급하는 원수펌프;A raw water pump for supplying the raw water to heat exchange means; 를 포함하여 구성된 것을 특징으로 하는 열병합 탈황탑의 폐열회수 장치.Waste heat recovery apparatus of the cogeneration desulfurization tower comprising a. 청구항 1에 있어서, 상기 탈황탑은:The method of claim 1, wherein the desulfurization tower is: 측면 하단에 유입구가 형성되고 상단에 배출구가 형성된 하우징과;A housing having an inlet formed at a lower side of the side and an outlet formed at an upper side thereof; 상기 하우징의 하단에 일정한 온도로 약품처리되어 저장된 순환수와;Circulating water that is chemically treated and stored at a constant temperature at the bottom of the housing; 상기 유입구를 통해 하우징 내부에 유입된 보일러의 배출가스를 일정한 온도로 강하시키도록 상기 하우징 내부 상측에 설치되어 순환수를 분사하는 분사노즐과;An injection nozzle installed above the housing to spray circulating water so as to lower the exhaust gas of the boiler introduced into the housing through the inlet to a predetermined temperature; 상기 분사노즐에 순환수를 제공하는 순환펌프;A circulation pump providing circulation water to the injection nozzle; 를 포함하는 것을 특징으로 하는 열병합 탈황탑의 폐열회수 장치.Waste heat recovery apparatus of the cogeneration desulfurization tower comprising a. 청구항 1 또는 청구항 2에 있어서, 상기 원수조는 원수펌프를 통해 상기 순환수보다 낮은 온도의 원수를 열교환수단에 제공하고, 상기 순환수와 열교환되어 승온된 원수를 다시 회수하여 각 공업용수로 사용하도록 한 것을 특징으로 하는 열병합 탈황탑의 폐열회수 장치.The raw water tank according to claim 1 or 2, wherein the raw water tank provides raw water having a lower temperature than the circulating water to the heat exchange means through a raw water pump, and recovers the raw water heated by heat exchange with the circulating water and uses it for each industrial water. Waste heat recovery apparatus of the cogeneration desulfurization tower, characterized in that. 청구항 1에 있어서, 상기 가열기 전의 배출가스의 온도를 55~60℃에서 40~55℃로 강하시킨 것을 특징으로 하는 열병합 탈황탑의 폐열회수 장치.The waste heat recovery apparatus of the cogeneration desulfurization tower according to claim 1, wherein the temperature of the exhaust gas before the heater is lowered from 55 to 60 ° C to 40 to 55 ° C. 청구항 1에 있어서, 상기 순환수의 온도는 55~60℃이고, 상기 원수의 온도는 0~20℃ 인 것을 특징으로 하는 열병합 탈황탑의 폐열회수 장치.The waste heat recovery apparatus of the cogeneration desulfurization tower according to claim 1, wherein the temperature of the circulating water is 55 to 60 ° C, and the temperature of the raw water is 0 to 20 ° C.
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