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KR20180079756A - Construction and treatment of seawater desulfurization facility using seawater concentrated water of seawater desalination facilities - Google Patents

Construction and treatment of seawater desulfurization facility using seawater concentrated water of seawater desalination facilities Download PDF

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KR20180079756A
KR20180079756A KR1020170000334A KR20170000334A KR20180079756A KR 20180079756 A KR20180079756 A KR 20180079756A KR 1020170000334 A KR1020170000334 A KR 1020170000334A KR 20170000334 A KR20170000334 A KR 20170000334A KR 20180079756 A KR20180079756 A KR 20180079756A
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seawater
exhaust gas
concentrated water
scrubber
desalination plant
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이해룡
김일배
이치섭
장필우
임정진
김부한
김덕호
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한국전력기술 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning

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Abstract

The present invention relates to a composition of a seawater desulfurization facility using seawater concentrated water in seawater desalination facilities, and a treatment method thereof. To this end, the treatment method comprises the following steps: allowing exhaust gas to pass through an electric precipitator; introducing the exhaust gas passed through the electric precipitator into a heat exchanger; introducing the exhaust gas passed through the heat exchanger into a scrubber; introducing oxygen into the scrubber; and introducing seawater concentrated water into the scrubber. By increasing desulfurization efficiency, it possible to enhance economic feasibility of the seawater desulfurization facilities.

Description

해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 구성 및 처리방법 {Construction and treatment of seawater desulfurization facility using seawater concentrated water of seawater desalination facilities}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater desulfurization facility using seawater concentrated water of a seawater desalination plant,

본 발명은 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 구성 및 처리방법에 관한 발명으로, 더욱 상세하게는 스크러버에 배기가스, 산소 및 고 알칼리도의 해수농축수를 혼합하는 해수탈황설비 및 그 처리방법에 관한 발명이다.The present invention relates to a method for constructing and treating a desalination plant for seawater using seawater concentrated water of a seawater desalination plant, and more particularly, to a desalination plant for desalination of seawater for mixing exhaust gas, oxygen and high alkalinity concentrated seawater into a scrubber, The present invention relates to a treatment method.

다량의 화석연료를 사용하고 있는 화력발전소 및 제철소 등은 연료 중 포함된 황(sulfur) 성분이 연소되어 황산화물로 대기 중으로 방출되는 것을 최소화하기 위해 환경오염방지설비인 탈황설비를 설치하여 배연가스 중 황산화물을 제거하여 대기 중으로 배출하고 있다. 황산화물은 산성비의 원인이며 미세먼지의 전구물질로 알려져 있어 각국에서는 법규를 통해 이를 규제하고 있다.In order to minimize the emission of sulfur compounds contained in fuel into the atmosphere as sulfur oxides, thermal power plants and steel mills that use a large amount of fossil fuels are equipped with desulfurization facilities to prevent environmental pollution, The sulfur oxides are removed and discharged to the atmosphere. Sulfuric acid is the cause of acid rain and is known as a precursor of fine dust, which is regulated by laws in various countries.

탈황설비의 방식은 여러 가지가 있지만, 화력발전소 및 제철소 등에 적용하는 대용량 탈황설비에는 신뢰성 및 경제성을 고려하여 습식 석회석 석고법을 주로 사용하고 있다. 그러나 중동지역과 같이 흡수제로 석회석을 구할 수 없는 지역이나, 탈황설비 부산물로 발생하는 석고를 재이용할 수 없는 지역에서는 해수를 이용하는 해수탈황설비를 적용하고 있다.Desulfurization facilities have various methods, but wet limestone gypsum method is mainly used for high-capacity desulfurization equipment applied to thermal power plants and steel mills considering reliability and economical efficiency. However, in areas such as the Middle East where limestone can not be obtained as an absorbent, or where gypsum can not be reused as a by-product of desulfurization facilities, seawater desalination facilities using seawater are being applied.

해수탈황설비의 화학반응식은 다음과 같다.The chemical reaction formula of seawater desulfurization equipment is as follows.

(SO2(g) + 2Na+ + 2HCO3 - + 1/2O2 → 2Na+ + SO4 2- + H20 + CO2(g))(SO 2 (g) + 2Na + + 2HCO 3 - + 1 / 2O 2 ? 2Na + + SO 4 2- + H 2 0 + CO 2 (g)

해수 중에 존재하는 중탄산염(HCO3 -)과 배기가스 중의 황산화물(SO2(g))을 반응시켜 무해한 황산염(2Na+ + SO42-)형태로 전환시키고, 이를 바다로 배출하여 배기가스 중의 유해한 황산화물을 제거하는 반응이다. (2Na + + SO42-) form by reacting bicarbonate (HCO 3 - ) present in seawater and sulfur oxides (SO 2 (g)) in exhaust gas and discharging it to the sea to remove harmful sulfur oxides It is a reaction to remove.

도 1을 종래의 해수탈황설비의 구성 및 처리방법을 도시한 도면이다. 이하 도 1을 참조하여 종래의 해수탈황설비의 구성 및 처리방법을 설명하도록 한다.Fig. 1 is a view showing a configuration and a processing method of a conventional seawater desulfurization facility. Hereinafter, a conventional seawater desulfurization system will be described with reference to FIG. 1.

종래의 해수탈황설비는 전기집진기(Electrostatic precipitator, 10), 열교환기(20), 스크러버(Scrubber, 30), 송풍기(40), 해수저장조(50), 굴뚝(60) 및 중화조(70)를 포함한다.Conventional seawater desulfurization equipment includes an electrostatic precipitator 10, a heat exchanger 20, a scrubber 30, a blower 40, a seawater storage tank 50, a chimney 60 and a neutralization tank 70 .

최초의 배기가스(1a)는 전기집진기(10)를 거친다. 전기집진기(10)는 전기적인 방법으로 가스 또는 액체 속에 부유하는 고체.액체의 입자를 채집하여 제거하는 장치를 말한다. 주로 발전소, 제철소 등에서 분진을 제거하는 역할을 한다. 따라서 최초의 배기가스(1a)는 전기집진기(10)에 유입되어 통과하게 되면 분진, 먼지 등이 제거된다.The first exhaust gas 1a passes through the electrostatic precipitator 10. The electrostatic precipitator 10 is an apparatus for collecting and removing particles of solid or liquid suspended in a gas or liquid by an electric method. It is mainly used to remove dust from power plants and steel mills. Therefore, dust, dust, and the like are removed when the first exhaust gas 1a flows into the electrostatic precipitator 10 and passes therethrough.

전기집진기(10)를 통과한 배기가스(1b)는 유로를 따라 이동하여 열교환기(20)에 유입된다. 열교환기(20)를 거친 배기가스(1c)는 온도가 저하된다. 해수와 반응성이 증가되고, 온도가 저하된 배기가스(1c)는 스크러버(30)로 유입될 수 있다.The exhaust gas 1b having passed through the electrostatic precipitator 10 moves along the flow path and flows into the heat exchanger 20. [ The temperature of the exhaust gas 1c having passed through the heat exchanger 20 is lowered. The reactivity with seawater is increased, and the exhaust gas 1c whose temperature has been lowered can be introduced into the scrubber 30. [

스크러버(Scrubber, 30)는 액체를 이용해서 가스 속에 부유하는 고체 또는 액체 입자를 포집(捕集)하는 장치이다. 스크러버(30)에서는 해수저장조(50)로부터 유입되는 해수(3a), 송풍기(40)로부터 공급되는 산소(2) 및 열교환기(20)를 거친 배기가스(1c)가 모두 모여 탈황반응을 하게 된다.A scrubber 30 is a device for collecting solid or liquid particles suspended in a gas using a liquid. In the scrubber 30, the sea water 3a flowing from the seawater storage tank 50, the oxygen 2 supplied from the blower 40, and the exhaust gas 1c passing through the heat exchanger 20 are collected and subjected to a desulfurization reaction .

화학반응식에서 전술하였듯이, 해수(3a) 중에 존재하는 중탄산염(HCO3-)과 배기가스(1c) 중의 황산화물(SO2(g))이 반응하고, 이를 통해 황산화물이 무해한 황산염(2Na+ + SO4 2-)형태로 전환된다. 즉, 배기가스 중의 황산화물이 해수(3a)를 통해 제거된다. 황산화물이 제거된 배기가스는 열교환기(20)를 거쳐 온도가 상승된다. 열교환기(20)를 거친 배기가스(1d)는 온도가 상승하여 확산 현상이 활발하고, 굴뚝(60)을 거쳐 외부로 방출된다. 따라서, 굴뚝(60)을 거친 배기가스(1e)는 최종적으로 무해한 가스가 된다.As mentioned above in the chemical reaction formula, water (3a) in the presence of bicarbonate (HCO3-) and exhaust gas (1c) of the sulfur oxide (SO2 (g)) sulfate reaction, and it is harmless to sulfur oxides through (2Na + + SO 4 2- ) form. That is, the sulfur oxides in the exhaust gas are removed through the seawater 3a. The exhaust gas from which the sulfur oxides have been removed is increased in temperature through the heat exchanger 20. The exhaust gas 1d having passed through the heat exchanger 20 has a temperature rising and is actively diffused, and is discharged to the outside through the chimney 60. Therefore, the exhaust gas 1e having passed through the chimney 60 becomes finally harmless gas.

배기가스(1c)와 반응한 해수(3b)는 중화조(70)에서 다량의 신선한 해수와 반응하여 pH조정이 이루어지고, 중화조(70)를 거친 해수(3c)는 바다로 흘러나가도 무해한 상태로 배출된다. 이러한 종래의 해수탈황설비는 흡수제가 필요하지 않아 종래의 습식 석회석 석고법에 따른 배연탈황설비보다 설비구성이 간단하고 경제적이다.The seawater 3b reacted with the exhaust gas 1c reacts with a large amount of fresh seawater in the neutralization tank 70 to adjust the pH of the seawater 3b and the seawater 3c passing through the neutralization tank 70 is harmless . Such a conventional desalination plant for seawater does not require an absorbent, which is simpler and more economical than a conventional flue gas desulfurization system according to the wet limestone gypsum method.

그러나, 종래의 해수탈황설비에서 사용되는 자연상태의 해수(3a)에는 황산화물의 흡수제 역할을 하는 알칼리도가 낮은 문제점이 있었다. 이로 인해, 별도의 약품을 주입하여 부족한 알칼리도를 보충하거나, 대용량의 해수를 투입하기 위한 펌프 등을 별도로 증축해야 하므로 경제성이 낮은 문제점이 있었다. 또한, 자연상태의 해수(3a)를 이용한 해수탈황설비는 종래의 습식 석회석 석고법에 따른 배연탈황설비보다 탈황효율이 낮은 문제점이 있었다. 이에 탈황효율성 및 경제성이 우수한 배연탈황설비의 구성 및 처리방법이 필요한 실정이다.However, there has been a problem in that the alkalinity serving as the absorbent of the sulfur oxide is low in the natural sea water 3a used in the conventional seawater desulfurization equipment. As a result, there is a problem in that economical efficiency is low because a separate medicine is injected to compensate for the lack of alkalinity, or a pump for injecting a large amount of seawater must be additionally expanded. In addition, there is a problem that desulfurization equipment using seawater (3a) in a natural state has lower desulfurization efficiency than flue gas desulfurization equipment according to a conventional wet limestone gypsum method. Therefore, there is a need for a structure and a treatment method of a flue gas desulfurization facility that has excellent desulfurization efficiency and economical efficiency.

본 발명은 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 구성 및 처리방법에 관한 발명으로, 해수담수화 설비에서 배출된 고(高) 알칼리도의 해수농축수를 공급하고, 이를 통해 탈황효율을 증가시켜 해수탈황설비의 경제성을 높이고자 한다.The present invention relates to a method for constructing and treating a desalination plant for seawater using seawater concentrated water of a seawater desalination plant, comprising the steps of supplying concentrated high-alkalinity seawater discharged from a desalination plant to increase desulfurization efficiency Thereby increasing the economic efficiency of the desalination plant.

이와 같은 목적을 달성하기 위해 본 발명에 따른 해수탈황설비의 처리방법은, 배기가스가 전기집진기를 통과하는 단계, 전기집진기를 통과한 배기가스가 열교환기에 유입되는 단계, 열교환기를 통과한 배기가스가 스크러버(Scrubber)에 유입되는 단계, 스크러버에 산소가 유입되는 단계 및 스크러버에 해수농축수가 유입되는 단계를 포함하는 것을 특징으로 한다.In order to achieve the above object, a method of treating a desalination plant according to the present invention comprises the steps of passing an exhaust gas through an electrostatic precipitator, flowing exhaust gas through an electrostatic precipitator into a heat exchanger, A step of introducing the water into the scrubber, a step of introducing oxygen into the scrubber, and a step of introducing the seawater concentrated water into the scrubber.

또한, 본 발명에 따른 해수탈황설비의 처리방법은, 해수담수화 설비의 탈염플랜트가 해수농축수를 생성하는 단계를 더 포함하는 것을 특징으로 할 수 있다.In addition, the method of treating a desalination plant for seawater according to the present invention may further include the step of generating a seawater concentrated water by a desalination plant of the desalination plant.

또한, 본 발명에 따른 해수탈황설비의 처리방법은, 해수농축수가 스크러버에 스프레이를 거쳐 분사형태로 유입되는 단계를 더 포함하는 것을 특징으로 할 수 있다.In addition, the method of treating a desalination plant for seawater according to the present invention may further comprise the step of introducing the seawater concentrated water into the scrubber through spraying.

또한, 본 발명에 따른 해수탈황설비의 처리방법은, 해수농축수가 배기가스와 반응 후 pH조정을 거쳐 바다로 방류되는 단계를 더 포함하는 것을 특징으로 할 수 있다.In addition, the method of treating a desalination plant for seawater desalination according to the present invention may further comprise the step of discharging seawater concentrated water to the sea through pH adjustment after reaction with exhaust gas.

또한, 본 발명에 따른 해수탈황설비의 처리방법은, 배기가스가 해수농축수와 반응 후 굴뚝을 거쳐 외부로 배출되는 단계를 더 포함하는 것을 특징으로 할 수 있다.In addition, the method for treating a desalination plant for seawater desalination according to the present invention may further include discharging the exhaust gas to the outside through a chimney after reacting with seawater concentrated water.

또한, 본 발명에 따른 해수탈황설비는, 배기가스의 먼지를 제거하는 전기집진기, 배기가스의 온도를 상승 또는 하강시키는 열교환기, 해수담수화 설비로부터 생성되는 해수농축수를 저장하는 해수농축수 저장조, 산소를 공급하는 송풍기 및 배기가스, 해수농축수 및 산소가 혼합되는 스크러버를 포함하는 것을 특징으로 한다.The seawater desulfurization system according to the present invention may further comprise an electrostatic precipitator for removing dust of the exhaust gas, a heat exchanger for raising or lowering the temperature of the exhaust gas, a seawater concentrate reservoir for storing the seawater concentrated water generated from the seawater desalination plant, A blower for supplying oxygen, and a scrubber for mixing exhaust gas, seawater concentrated water and oxygen.

또한, 본 발명에 따른 해수탈황설비는, 스크러버로부터 배출되는 해수농축수가 유입되는 중화조를 더 포함하는 것을 특징으로 할 수 있다.Further, the desalination plant for seawater according to the present invention may further include a neutralization tank into which seawater concentrated water discharged from the scrubber flows.

또한, 본 발명에 따른 해수탈황설비는, 스크러버로부터 배출되는 배기가스가 유입되는 굴뚝을 더 포함하는 것을 특징으로 할 수 있다.Further, the seawater desulfurization system according to the present invention may further include a chimney into which exhaust gas discharged from the scrubber flows.

또한, 본 발명에 따른 해수탈황설비는, 스크러버로부터 배출되는 배기가스의 액적을 제거하는 습분분리기를 더 포함하는 것을 특징으로 할 수 있다.Further, the seawater desulfurization system according to the present invention may further include a moisture separator for removing droplets of the exhaust gas discharged from the scrubber.

본 발명에 따르면, 해수담수화 설비에서 발생된 해수농축수(4a)를 이용한 해수탈황설비로 배기가스를 처리하게 되면, 종래의 자연 상태의 해수(3a)보다 알칼리도가 2~3배 정도 높아 탈황 효율이 증가하는 장점이 있다.According to the present invention, when the exhaust gas is treated by the desalination plant using the seawater concentrated water 4a generated in the desalination plant, the degree of alkalinity is about 2 to 3 times higher than that of the conventional natural sea water 3a, There is an advantage to increase.

또한, 종래의 해수탈황설비에 비해 해수(본 발명에 따르면 해수농축수)투입량을 저감할 수 있고, 펌프 등의 부가 장치가 불요하여 탈황설비의 용량을 줄일 수 있다. 이로 인해 경제성이 증가한다.Further, the amount of seawater (seawater concentrated water according to the present invention) input can be reduced compared to a conventional seawater desulfurization facility, and an additional device such as a pump is not required, and the capacity of the desulfurization facility can be reduced. This increases economic efficiency.

또한, 종래의 해수탈황설비보다 소요부지가 적게 필요하므로 선박과 같이 기자재 설치공간이 협소한 곳에 적용이 용이한 장점이 있다.In addition, since it requires less space than conventional seawater desulfurization equipment, it can be easily applied to a place where installation space of equipment is narrow like a ship.

또한, 해수담수화 설비에서 필연적으로 발생하는 해수농축수를 해수탈황설비에서 이용하므로 해수담수화 설비에서 해수농축수 방류설비가 별도로 필요하지 않게 된다. 이로 인해, 경제적인 해수담수화 설비의 구성을 가능케 하는 장점이 있다.In addition, the seawater desalination plant that is inevitably used in the seawater desalination plant uses the concentrated seawater in the desalination plant, so there is no need to separately supply the seawater concentrated water from the desalination plant. This makes it possible to construct an economical seawater desalination plant.

도 1은 종래의 해수탈황설비 및 배기가스 처리과정을 도시한 도면.
도 2는 본 발명에 따른 해수탈황설비 및 배기가스 처리과정을 도시한 도면.
도 3은 해수농축수의 흐름을 도시한 도면.
도 4는 본 발명에 따른 해수탈황설비의 배기가스 처리과정을 도시한 순서도.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a conventional seawater desulfurization facility and an exhaust gas treatment process. FIG.
2 is a view showing a process of treating a desalination plant and an exhaust gas according to the present invention.
3 is a view showing a flow of seawater concentrated water;
4 is a flowchart showing an exhaust gas treatment process of a desalination plant for seawater according to the present invention.

이하, 본 발명의 일 실시예에 따른 바람직한 실시예를 첨부된 도면을 참조하면서 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 해수탈황설비 및 배기가스 처리과정을 도시한 도면이다. 이하 도 2를 참조하여 본 발명에 따른 해수탈황설비를 설명하도록 한다.2 is a view showing a process of treating a desalination plant and an exhaust gas according to the present invention. Hereinafter, a seawater desulfurization system according to the present invention will be described with reference to FIG.

본 발명에 따른 해수탈황설비는 종래의 해수탈황설비와 기본적인 구조는 유사하다. 다만, 해수(3a)가 아닌 해수농축수(4a)가 유입된다는 점에서 차이가 있다.The seawater desulfurization system according to the present invention has a basic structure similar to that of a conventional seawater desulfurization system. However, there is a difference in that the seawater concentrated water (4a) is introduced rather than the seawater (3a).

본 발명에 따른 해수탈황설비는 전기집진기(Electrostatic precipitator, 100), 열교환기(200), 스크러버(Scrubber, 300), 송풍기(400), 해수농축수 저장조(500), 굴뚝(600) 및 중화조(700)를 포함한다.The desalination plant for seawater according to the present invention includes an electrostatic precipitator 100, a heat exchanger 200, a scrubber 300, a blower 400, a seawater concentrate storage 500, a chimney 600, (700).

최초의 배기가스(1a)는 전기집진기(100)를 거친다. 전기집진기(100)는 전기적인 방법으로 가스 또는 액체 속에 부유하는 고체.액체의 입자를 제거하거나 채집하는 장치를 말한다. 따라서 최초의 배기가스(1a)는 전기집진기(100)에 유입되고, 이를 통과하면 최초의 배기가스(1a) 내의 분진, 먼지 등이 제거된다.The first exhaust gas 1a passes through the electrostatic precipitator 100. The electrostatic precipitator 100 refers to an apparatus for removing or collecting solid or liquid particles suspended in a gas or liquid by an electric method. Therefore, the first exhaust gas 1a flows into the electrostatic precipitator 100, and dust, dust, etc. in the first exhaust gas 1a are removed when the first exhaust gas 1a passes through the electrostatic precipitator 100.

전기집진기(100)를 통과한 배기가스(1b)는 유로를 따라 이동하여 열교환기(200)에 유입된다. 열교환기(200)를 거친 배기가스(1c)는 온도가 저하된다. 해수와 반응성이 증가된 온도가 저하된 배기가스(1c)는 스크러버(300)로 유입된다.The exhaust gas 1b having passed through the electrostatic precipitator 100 moves along the flow path and flows into the heat exchanger 200. [ The temperature of the exhaust gas 1c having passed through the heat exchanger 200 is lowered. The exhaust gas (1c) whose temperature and reactivity increased with the seawater flows into the scrubber (300).

스크러버(Scrubber, 300)는 액체를 이용해서 가스 속에 부유하는 고체 또는 액체 입자를 포집(捕集)하는 장치이다. 스크러버(300)에서는 해수농축수 저장조(500)로부터 유입되는 해수농축수(4a), 송풍기(400)로부터 공급되는 산소(2) 및 열교환기(200)를 거친 배기가스(1c)가 모두 모여 탈황반응을 하게 된다.A scrubber 300 is a device that collects solid or liquid particles suspended in a gas using a liquid. The scrubber 300 collects the seawater concentrated water 4a flowing from the seawater concentrated water storage tank 500, the oxygen 2 supplied from the blower 400 and the exhaust gas 1c passed through the heat exchanger 200, Reaction.

화학반응식에서 전술하였듯이, 해수농축수(4a) 중에 존재하는 중탄산염(HCO3 -)과 배기가스(1c) 중의 황산화물(SO2(g))을 반응하고, 이를 통해 황산화물이 무해한 황산염(2Na+ + SO4 2-)형태로 전환된다. 즉, 배기가스 중의 황산화물이 해수농축수(4a)를 통해 제거된다.(HCO 3 - ) present in the seawater concentrated water 4a and the sulfur oxide (SO 2 (g)) in the exhaust gas 1c are reacted as described above in the chemical reaction formula, + + SO 4 2- ). That is, the sulfur oxides in the exhaust gas are removed through the seawater concentrated water 4a.

이때, 해수농축수(4a)는 종래의 자연상태의 해수(3a)보다 알칼리도(HCO3 -, CO3 2-, OH-)가 2~3배 높다. 따라서, 동일 용량의 해수농축수(4a) 및 해수(3a)로 해수탈황을 한다고 가정하면, 해수농축수(4a)를 이용한 배기가스 탈황의 탈황효율이 높다. 이로 인해, 종래의 해수(3a)를 이용한 배기가스 탈황보다 경제성이 뛰어나게 된다. 또한, 종래와는 달리 해수농축수(4a)를 대용량을 투입할 필요 없어 대용량의 펌프 장치의 부설이 불요하고, 이로 인해 편의성 및 경제성이 증대된다.At this time, the alkalinity (HCO 3 - , CO 3 2- , OH - ) of the seawater concentrated water 4a is two to three times higher than that of the conventional natural sea water 3a. Therefore, assuming that the seawater desulfurization is performed by the seawater concentrated water 4a and the seawater 3a of the same capacity, the desulfurization efficiency of the exhaust gas desulfurization using the seawater concentrated water 4a is high. As a result, it is more economical than exhaust gas desulfurization using the conventional seawater 3a. Unlike the prior art, it is not necessary to apply a large capacity to the seawater concentrated water 4a, and thus it is unnecessary to install a large-capacity pump device, thereby increasing convenience and economy.

해수농축수(4a)는 해수담수화 설비(800)로부터 발생한다. 이를 설명하기 위해 도 3을 참조하도록 한다. 해수담수화 설비(800) 내부로 취수된 해수는 해수담수화 설비(800) 내의 고압의 해수담수화용 펌프(801)를 거친다. 펌프(801)를 거친 해수는 탈염플랜트(802)로 유입된다. 탈염플랜트(802)에서 해수는 순수한 물인 담수와 해수 중 염분성분이 농축된 해수농축수로 분리된다. 담수는 담수조(803)로 유입되어 공업용수로 사용되고, 해수농축수(4a)는 해수농축수 저장조(500)에 보관되며, 배기가스(1c)가 스크러버(300)에 유입 시, 스크러버(300)에 유입되어 배기가스(1c) 및 산소(2)와 반응한다. 따라서, 종래의 해수담수화 설비 경우 해수농축수(4a)를 처리하기 위한 별도의 장치가 필요하나, 본 발명에 따르면 해수탈황설비에 곧바로 사용될 수 있어, 해수담수화 설비의 경제성이 증대되는 추가 효과도 발생한다.The seawater concentrated water (4a) originates from the seawater desalination plant (800). Reference is made to Fig. 3 for explaining this. The seawater taken into the seawater desalination plant 800 is passed through a high pressure seawater desalination pump 801 in the seawater desalination plant 800. The seawater flowing through the pump 801 flows into the desalination plant 802. In the desalination plant (802), the seawater is separated into fresh water, which is pure water, and seawater concentrated water, in which the salt component in the seawater is concentrated. The seawater concentrated water 4a is stored in the seawater concentrated water storage tank 500. When the exhaust gas 1c flows into the scrubber 300, the fresh water is introduced into the scrubber 300, And reacts with the exhaust gas 1c and the oxygen 2. Therefore, although a separate apparatus for treating the seawater concentrated water 4a in the case of a conventional seawater desalination plant is required, according to the present invention, an additional effect of increasing the economical efficiency of the desalination plant can be obtained do.

이때, 해수농축수 저장조(500)로부터 스크러버(300)에 유입되는 해수는, 스프레이 장치(310)를 거쳐 분사형태로 유입되는 것이 바람직하다. 스크러버(300)에 유입되는 배기가스(1c)와 접촉면적을 넓혀 탈황효율을 증대시키기 위함이다.At this time, it is preferable that the seawater flowing into the scrubber 300 from the seawater concentrated water storage tank 500 flows in the form of spray through the spray device 310. So as to increase the contact area with the exhaust gas 1c flowing into the scrubber 300, thereby increasing the desulfurization efficiency.

해수농축수(4a) 및 산소(2)와 탈황반응하여 황산화물이 제거된 배기가스는 열교환기(200)를 거쳐 온도가 상승된다. 열교환기(200)를 거친 배기가스(1d)는 온도가 상승하여 확산 현상이 활발하게 된다. 이로 인해 해수탈황설비 외부로 신속하게 배출될 수 있다. 배기가스(1d)는 굴뚝(60)을 거치고, 최종적으로 외부로 방출된다. 따라서, 굴뚝(60)을 거친 배기가스(1e)는 최종적으로 환경에 무해하고, 환경규제를 위반하지 않는 가스가 된다.The exhaust gas from which sulfuric acid is removed by the desulfurization reaction with the seawater concentrated water 4a and the oxygen 2 is raised in temperature through the heat exchanger 200. The temperature of the exhaust gas 1d having passed through the heat exchanger 200 rises and diffusion phenomenon becomes active. As a result, it can be quickly discharged to the outside of the desalination plant. The exhaust gas 1d passes through the chimney 60 and is eventually discharged to the outside. Therefore, the exhaust gas 1e that has passed through the chimney 60 is finally harmless to the environment and becomes a gas that does not violate the environmental regulations.

이때, 열교환기(200)를 거친 배기가스(1d)가 이동되는 유로에는 습분분리기(미도시)가 설치되는 것이 바람직하다. 배기가스가 해수농축수(4a)와 반응하게 되면, 배기가스(1d)에는 필연적으로 액적이 포함된다. 이러한 액적으로 인해 해수탈황설비에 부식이 발생되거나, 스케일이 발생되는 문제점이 있다. 따라서 습분분리기를 통해 배기가스의 액적을 제거하게 되면, 해수탈황설비의 내구성을 증대하고, 수명을 연장시킬 수 있다.At this time, it is preferable that a wet separator (not shown) is installed in the flow passage through which the exhaust gas 1d having passed through the heat exchanger 200 is moved. When the exhaust gas reacts with the seawater concentrated water 4a, the droplet is inevitably included in the exhaust gas Id. Such droplets may cause corrosion or scaling in the desalination plant of the seawater. Therefore, by removing the droplets of the exhaust gas through the wet separator, the durability of the desalination plant of the seawater can be increased and the service life can be prolonged.

스크러버(300)에서 배기가스(1c)와 반응한 해수농축수(4b)는 중화조(700)를 거친다. 해수농축수(4b)는 중화조(700)에서 다량의 신선한 해수와 반응하여 pH 조정이 이루어져, 바다에 방출되기 적합한 상태의 해수농축수가 된다. 중화조(700)를 거친 해수농축수(4c)는 최종적으로 바다로 방류된다.The seawater concentrated water 4b which has reacted with the exhaust gas 1c in the scrubber 300 passes through the neutralization tank 700. The sea water concentrated water (4b) reacts with a large amount of fresh seawater in the neutralization tank (700) to adjust the pH and become a concentrated water of sea water suitable for release to the sea. The seawater concentrated water 4c having passed through the neutralization tank 700 is finally discharged to the sea.

도 4는 본 발명에 따른 해수탈황설비를 이용한 배기가스의 처리과정을 도시한 순서도이다. 이하 도 4를 참조하여 배기가스 처리과정을 설명하도록 한다.4 is a flowchart showing a process of treating exhaust gas using a desalination plant for seawater according to the present invention. Hereinafter, the exhaust gas treatment process will be described with reference to FIG.

배기가스(1a)는 전기집진기(100)를 통과하는 단계(S100)를 거친다. 이를 통해 배기가스(1a) 내의 먼지, 분진 등이 제거되게 된다.The exhaust gas 1a passes through the electrostatic precipitator 100 (S100). Dust, dust, etc. in the exhaust gas 1a are removed.

전기집진기(100)를 통과한 배기가스(1b)는 열교환기(200)를 통과한다(S200). 열교환기(200)를 통과한 배기가스(1c)는 온도가 낮아서 스크러버(300)에 포집되게 된다.The exhaust gas 1b having passed through the electrostatic precipitator 100 passes through the heat exchanger 200 (S200). The exhaust gas 1c having passed through the heat exchanger 200 is collected at the scrubber 300 because the temperature thereof is low.

스크러버(300)로 유입된 배기가스(1c)는, 스크러버(300) 내에서, 해수농축수 저장조(500)로부터 유입되는 해수농축수(4a) 및 송풍기(400)로부터 유입되는 산소(2)와 탈황 반응을 한다(S400). 탈황 반응으로 인해 황산화물이 제거된 배기가스는 열교환기(200)를 거쳐 온도가 상승되고, 온도가 상승된 배기가스(1d)는 굴뚝(600)을 통해 외부로 방출된다.The exhaust gas 1c flowing into the scrubber 300 is supplied to the scrubber 300 through the seawater concentrated water 4a flowing from the seawater concentrated water storage tank 500 and the oxygen 2 supplied from the blower 400 A desulfurization reaction is performed (S400). The exhaust gas from which the sulfur oxides are removed due to the desulfurization reaction is raised in temperature through the heat exchanger 200 and the exhaust gas 1d whose temperature is raised is discharged to the outside through the chimney 600.

해수농축수(4a)는 배기가스(1c)와 반응 후 스크러버(300)에서 배출된다. 스크러버(300)로부터 배출된 해수농축수(4b)는 중화조(700)를 거친다(S500). 중화조(700)를 거쳐 pH 조정이 된 해수농축수(4c)는 바다로 유입된다(S600).The seawater concentrated water 4a is discharged from the scrubber 300 after reacting with the exhaust gas 1c. The seawater concentrated water 4b discharged from the scrubber 300 passes through the neutralization tank 700 (S500). The seawater concentrated water 4c having undergone the pH adjustment through the neutralization tank 700 flows into the sea (S600).

위와 같이 해수담수화 설비에서 발생된 해수농축수(4a)를 이용한 해수탈황설비로 배기가스를 처리하게 되면, 종래의 자연 상태의 해수(3a)보다 알칼리도가 2~3배 정도 높아 탈황 효율이 증가하는 장점이 있다.When the exhaust gas is treated by the desalination plant using the seawater concentrated water 4a generated in the seawater desalination plant as described above, the alkalinity is 2 to 3 times higher than the conventional natural state seawater 3a, There are advantages.

또한, 종래의 해수탈황설비에 비해 해수(본 발명에 따르면 해수농축수)투입량을 저감할 수 있고, 펌프 등의 부가 장치를 최소화하여 탈황설비의 용량을 줄일 수 있다. 이로 인해 경제성이 증가한다.Further, the amount of seawater (seawater concentrated water according to the present invention) input can be reduced compared with a conventional seawater desulfurization facility, and the capacity of the desulfurization facility can be reduced by minimizing the additional device such as a pump. This increases economic efficiency.

또한, 종래의 해수탈황설비보다 소요부지가 적게 필요하므로 선박과 같이 기자재 설치공간이 협소한 곳에 적용이 용이한 장점이 있다.In addition, since it requires less space than conventional seawater desulfurization equipment, it can be easily applied to a place where installation space of equipment is narrow like a ship.

또한, 해수담수화설비에서 필연적으로 발생하는 해수농축수를 해수탈황설비에서 이용하므로 해수담수화설비에서 해수농축수 방류설비가 별도로 필요하지 않게 된다. 이로 인해, 경제적인 해수담수화 설비의 구성을 가능케 하는 장점이 있다.In addition, the seawater desalination plant that is inevitably used in the seawater desalination plant uses the concentrated seawater in the desalination plant, so there is no need to separately supply the seawater concentrated water from the desalination plant. This makes it possible to construct an economical seawater desalination plant.

이상에서 다양한 실시예를 들어 본 발명을 설명하였으나, 이에 한정되는 것은 아니며 본 발명의 권리범위로부터 합리적으로 해석될 수 있는 것이라면 무엇이나 본 발명의 권리범위에 속하는 것은 당연하다.While the present invention has been described with reference to the particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

*도면의 주요부위에 대한 부호의 설명*
100...전기집진기 200...열교환기
300...스크러버 400...송풍기
500...해수농축수 저장조 600...굴뚝
700...중화조 800...해수담수화 설비[Description of Reference Numerals]
100 ... Electrostatic precipitator 200 ... Heat exchanger
300 ... scrubber 400 ... blower
500 ... sea water concentrated water storage tank 600 ... chimney
700 ... neutralization tank 800 ... seawater desalination plant

Claims (9)

배기가스가 전기집진기를 통과하는 단계;
상기 전기집진기를 통과한 배기가스가 열교환기에 유입되는 단계;
상기 열교환기를 통과한 배기가스가 스크러버(Scrubber)에 유입되는 단계;
상기 스크러버에 산소가 유입되는 단계; 및
상기 스크러버에 해수농축수가 유입되는 단계를 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 처리방법.Passing the exhaust gas through an electrostatic precipitator;
Flowing the exhaust gas through the electrostatic precipitator into a heat exchanger;
Flowing the exhaust gas passed through the heat exchanger into a scrubber;
Introducing oxygen into the scrubber; And
And introducing seawater concentrated water into the scrubber. The method of treating a desalination plant using seawater concentrated water of a seawater desalination plant. 청구항 1에 있어서,
해수담수화 설비의 탈염플랜트가 상기 해수농축수를 생성하는 단계를 더 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 처리방법.The method according to claim 1,
Wherein the desalination plant of the seawater desalination plant generates the seawater concentrated water. The method of treating a desalination plant for seawater desalination using seawater concentrated water of a seawater desalination plant. 청구항 2에 있어서,
상기 해수농축수가 상기 스크러버에 스프레이를 거쳐 분사형태로 유입되는 단계를 더 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 처리방법.The method of claim 2,
Further comprising the step of injecting the seawater concentrated water into the scrubber through a spray, in the form of a spray. ≪ RTI ID = 0.0 > 15. < / RTI > 청구항 3에 있어서,
상기 해수농축수가 상기 배기가스와 반응 후 pH조정을 거쳐 바다로 방류되는 단계를 더 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 처리방법.The method of claim 3,
Further comprising the step of allowing the seawater concentrated water to react with the exhaust gas and then returning to the sea through pH adjustment. 청구항 4에 있어서,
상기 배기가스가 상기 해수농축수와 반응 후 굴뚝을 거쳐 외부로 배출되는 단계를 더 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 처리방법.The method of claim 4,
Wherein the exhaust gas is discharged to the outside through a chimney after reacting with the seawater concentrated water. 해수탈황설비에 있어서,
배기가스의 먼지를 제거하는 전기집진기;
배기가스의 온도를 상승 또는 하강시키는 열교환기;
해수담수화 설비로부터 생성되는 해수농축수를 저장하는 해수농축수 저장조;
산소를 공급하는 송풍기; 및
상기 배기가스, 상기 해수농축수 및 상기 산소가 혼합되는 스크러버를 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 구성.In seawater desulfurization equipment,
An electrostatic precipitator for removing dust from the exhaust gas;
A heat exchanger for raising or lowering the temperature of the exhaust gas;
A seawater concentrate reservoir for storing the seawater concentrate generated from the seawater desalination plant;
A blower for supplying oxygen; And
And a scrubber that mixes the exhaust gas, the seawater concentrated water, and the oxygen. The desalination plant of claim 1, wherein the desalination plant is a water desalination plant. 청구항 6에 있어서,
상기 스크러버로부터 배출되는 상기 해수농축수가 유입되는 중화조를 더 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 구성.The method of claim 6,
Further comprising a neutralization tank into which the seawater concentrated water discharged from the scrubber is introduced. 청구항 7에 있어서,
상기 스크러버로부터 배출되는 상기 배기가스가 유입되는 굴뚝을 더 포함하는 것을 특징으로 하는 해수담수화 설비의 해수농축수를 이용한 해수탈황설비의 구성.The method of claim 7,
And a chimney into which the exhaust gas discharged from the scrubber flows. The desalination apparatus according to claim 1, 청구항 6에 있어서,
상기 스크러버로부터 배출되는 상기 배기가스의 액적을 제거하는 습분분리기를 더 포함하는 것을 특징으로 하는 해수탈황설비의 구성.The method of claim 6,
Further comprising a moisture separator for removing droplets of the exhaust gas discharged from the scrubber.
KR1020170000334A 2017-01-02 2017-01-02 Construction and treatment of seawater desulfurization facility using seawater concentrated water of seawater desalination facilities Ceased KR20180079756A (en)

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