KR20060006278A - Method for removal of gas gas heater scale in flue-gas desulfurization system - Google Patents
Method for removal of gas gas heater scale in flue-gas desulfurization system Download PDFInfo
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- KR20060006278A KR20060006278A KR1020040055206A KR20040055206A KR20060006278A KR 20060006278 A KR20060006278 A KR 20060006278A KR 1020040055206 A KR1020040055206 A KR 1020040055206A KR 20040055206 A KR20040055206 A KR 20040055206A KR 20060006278 A KR20060006278 A KR 20060006278A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
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Abstract
본 발명은 발전소의 배연탈황설비의 가스가스히터(Gas-Gas Heater : 이하 GGH라 칭함) 열소자에 부착되어 있는 석탄회와 석고가 혼합된 난용성 고착물을 제거하기 위한 것으로 보일러 배기가스 흐름방향으로 GGH 하부 측에 염산수용액을 분사하여 부풀리는 단계, 스팀분무에 의해 건조시키는 단계, 고압수에 의해 타격하는 단계를 반복적으로 수행하여 배연탈황설비 및 발전기의 정지 없이 GGH 열소자에서 고착물을 제거하는 방법을 제공하기 위한 것이다. The present invention is to remove the poorly soluble solid matter mixed with the coal ash and gypsum attached to the gas element (Gas-Gas Heater (hereinafter referred to as GGH)) heating element of the flue gas desulfurization facilities of the power plant in the direction of the boiler exhaust gas flow Spraying hydrochloric acid solution on the lower side of GGH to inflate, dry by steam spraying, and blow by high pressure water to remove the fixed matter from GGH heating element without stopping the flue gas desulfurization facility and generator It is to provide a method.
발전소, 배연탈황설비, GGH, 고착물, 염산수용액Power plant, flue gas desulfurization equipment, GGH, fixtures, hydrochloric acid aqueous solution
Description
도 1은 본 발명에 따른 배연탈황설비의 고착물 제거설비의 개략도 이다.1 is a schematic diagram of a fixed matter removal equipment of the flue gas desulfurization equipment according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
10 ---- 가스가스히터(GGH) 20 ---- 저압수세라인10 ----
30 ---- 순환펌프 40 ---- 고압수세라인30 ----
50 ---- 폐수 집수조 50 ---- wastewater sump
본 발명은 발전소의 배연탈황설비의 가스가스히터(Gas-Gas Heater : 이하 GGH라 칭함) 열소자에 부착되어 있는 고착물을 제거하는 방법에 관한 것이다. 더욱 상세하게는 본 발명은 석탄회와 석고가 혼합된 난용성 고착물을 제거하기 위한 것으로 보일러 배기가스 흐름방향으로 GGH 하부 측에 염산수용액을 분사하여 부풀리는 단계, 스팀분무에 의해 건조시키는 단계, 고압수에 의해 타격하는 단계를 반복적으로 수행하여 배연탈황설비 및 발전기의 정지 없이 GGH 열소자에서 고착물을 제거하는 방법에 관한 것이다.The present invention relates to a method for removing a deposit attached to a gas-gas heater (hereinafter referred to as GGH) thermal element of a flue gas desulfurization facility of a power plant. More specifically, the present invention is to remove the poorly soluble deposits mixed with coal ash and gypsum by injecting hydrochloric acid aqueous solution to the GGH lower side in the boiler exhaust gas flow direction, inflating, drying by steam spraying, high pressure The present invention relates to a method of removing a deposit from a GGH heating element without stopping a flue gas desulfurization facility and a generator by repeatedly performing a blow by water.
종래, 발전소의 탈황설비를 운전한 후 7 ~ 8개월이 경과하면, 열소자에 석탄회와 석고가 혼합된 난용성 고착물이 부착되어 GGH 차압이 급상승하게 되므로 발전설비를 정지한 후 사람의 수작업에 의해 고압, 예를 들면 약 400kg/㎠의 에어 건(Air gun)으로 GGH 고착물에 물리적인 힘을 가하여 제거하였다.Conventionally, when 7 to 8 months have elapsed since the desulfurization facility of a power plant is operated, a poorly soluble solid matter mixed with coal ash and gypsum is attached to the heating element, so that the GGH differential pressure is rapidly increased. By means of an air gun of high pressure, for example about 400 kg / cm 2, by applying a physical force to the GGH fixture.
또한, 발전설비를 정지시키고 유기·무기산 약품을 GGH에 연속적으로 순환시켜 고착물을 약품 용해에 의해 제거하는 방법을 사용하였다.In addition, a method of stopping the power generation equipment and continuously circulating organic and inorganic acid chemicals in GGH was used to remove the fixed substances by chemical dissolution.
그러나, 상기 수작업에 의해 제거하는 방법은 열소자 표면에 박리가 발생하고, 고착물이 제거된 부위의 표면에는 열소자가 굴곡 변형이 발생하였다. 따라서, 제거작업 이후 열소자에 고착물 부착이 가속화되어 잦은 제거작업이 필요하며, 고착물 제거작업이 현장에서 수작업으로 이루어지게 되므로 작업시간의 소요가 많고 작업 안전 확보에 상당한 어려움이 있었다.However, in the manual removal method, peeling occurs on the surface of the heating element, and bending of the heating element occurs on the surface of the portion from which the fixed matter is removed. Therefore, after the removal work is attached to the thermal element is accelerated attachment of frequent removal work is required, since the removal work of the fixture is made by hand in the field takes a lot of work time and had a considerable difficulty in securing work safety.
또한, 고착물 용해에 의한 제거방법은 발전설비의 정지, 세정용 가 배관의 설치 및 철거, 유기산 사용으로 인한 폐수처리의 어려움 등이 있으며, 약품 사용량도 많고, 작업 시간도 장시간이 소요되는 문제점이 있었다.In addition, the removal method by dissolving the fixed substance is difficult to stop the power generation equipment, installation and removal of the cleaning pipe for cleaning, wastewater treatment due to the use of organic acid, the use of chemicals, and the long time required for work there was.
이에 본 발명은 종래의 이와 같은 문제점을 해결하기 위한 것으로 보일러 배기가스 흐름방향으로 GGH 하부 측에 염산수용액을 분사하여 부풀리는 단계, 스팀분무에 의해 건조시키는 단계, 고압수에 의해 타격하는 단계를 반복적으로 수행하여 배연탈황설비 및 발전기의 정지 없이 GGH 열소자에서 고착물을 제거하는 방법을 제공하는 것을 목적으로 한다. Therefore, the present invention is to solve such a problem in the prior art by injecting hydrochloric acid solution to the GGH lower side in the boiler exhaust gas flow direction, inflating, drying by steam spraying, hitting by high pressure water repeatedly The purpose of the present invention is to provide a method for removing the deposits from the GGH heating element without stopping the flue gas desulfurization facilities and generators.
본 발명의 배연탈황설비의 GGH 고착물의 제거방법은 발전설비의 정상 운전 중 GGH 열소자의 고착물에 보일러 배기가스 흐름 방향으로 1 내지 2%의 염산 수용액을 분무하여 상기 고착물 내부에 염산 수용액의 흡착에 의해 부풀리는 단계; 상기 고착물에 스팀분무에 의해 건조하는 단계 및 상기 고착물에 대해 고압 수세 설비로 타격에 의해 제거하는 단계로 이루어지는 것을 특징으로 한다. The method for removing GGH deposits from the flue gas desulfurization plant of the present invention sprays 1 to 2% aqueous hydrochloric acid solution in the direction of the boiler exhaust gas to the fixtures of the GGH heating element during normal operation of the power plant. Inflated by adsorption; Drying by the steam spray on the fixture and characterized in that it comprises a step of removing by blow to the high pressure washing equipment for the fixture.
이와 같은 본 발명을 첨부한 도면에 의거하여 더욱 상세히 설명하면 다음과 같다.When described in more detail based on the accompanying drawings of the present invention as follows.
본 발명은 발전소 연돌배기가스 중의 아황산가스를 제거하는 탈황설비 중 GGH의 열소자에 부착되는 석탄회와 석고의 난용성 고착물을 발전기 및 탈황설비의 정지 없이 제거하는 방법으로서, 물리적인 방법과 화학적인 방법을 병행하는 것을 특징으로 한다.The present invention is a method for removing poorly soluble deposits of coal ash and gypsum attached to a thermal element of GGH in a desulfurization facility for removing sulfurous acid gas in a flue gas of a power plant without stopping generators and desulfurization facilities. It is characterized by the parallel method.
즉, GGH(10) 정상운전 중에 하부에서 1 내지 2%의 염산 수용액을 보일러 배기가스흐름과 같은 방향으로 고온부로 저압 수세 라인(20)의 노즐을 사용하여 분사하고, GGH(10)의 회전 원심력에 의해 저온부로 염산수용액을 회수한 후, 회수액을 다시 고온부로 순환 펌프(30)를 사용해서 연속 순환시켜 고착물 내부로 수용액을 흡착시켜 부풀어오르게 한다.That is, during normal operation of the
다음에 상기 고착물의 탈리력 향상을 위해 일정시간 동안 스팀분무에 의해 건조를 실시한 후, 건조된 고착물을 GGH에 부착되어 있는 100kg/㎠의 고압 수세 라인(40)의 설비를 이용하여 상, 하부에서 타격에 의해 제거한다. Next, after drying by steam spraying for a predetermined time to improve the desorbing force of the fixed matter, using the equipment of the high
탈리된 고착물은 GGH 하부 폐수 집수조(50)로 이송시키며, 고착물의 탈리율은 석고 성분 중 일부인 칼슘(Ca) 농도를 측정하여 확인할 수 있다. 칼슘 농도 상승없이 일정한 값을 유지하면 상기 부풀림-건조-타격 사이클을 반복적으로 수행한다. The detached deposits are transferred to the lower GGH
GGH 차압을 관찰하면서 고착물의 제거 공정이 끝나면 탄산나트륨(Na2CO3)으로 열소자에 흡착된 염산수용액을 중화시키고 하이드라진(N2H4)을 사용하여 방청을 실시한 후 내부를 건조시키면 된다. After observing the GGH differential pressure, the removal process of the deposits is completed. The solution is neutralized with sodium carbonate (Na 2 CO 3 ) to neutralize the hydrochloric acid solution adsorbed on the thermal element, and then rust-prevented using hydrazine (N 2 H 4 ).
본 발명에 따른 배연탈황설비의 GGH 고착물의 제거방법은 발전기의 정지 없이 고착물의 제거 작업이 가능하여 발전 능력을 향상시킬 수 있고, 고착물의 물리적 제거 시 우려되는 설비의 변형을 해소할 수 있으며, 탈황설비 GGH 고착물의 제거시간을 단축할 수 있고, 고착물 제거용 가설설비의 설치가 불필요하며, 고착물의 타격에 의한 제거로 약품의 사용량을 최소화할 수 있고, 발전설비 통풍계통의 차압감소로 동력비도 절감할 수 있는 효과가 있다.
GGH sediment removal method of the flue gas desulfurization facility according to the present invention can remove the fixed matter without stopping the generator to improve the power generation capacity, can eliminate the deformation of the facility concerned when physical removal of the sediment, desulfurization It can shorten the removal time of facility GGH fixtures, it is not necessary to install temporary equipment for removing fixtures, minimize the use of chemicals by removing the fixtures, and reduce the power cost by reducing the differential pressure of the power plant ventilation system. There is a saving effect.
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US4079701A (en) * | 1976-05-17 | 1978-03-21 | Westinghouse Electric Corporation | Steam generator sludge removal system |
KR19980017535U (en) * | 1996-09-24 | 1998-07-06 | 김종진 | Steam Turbine Surface Multiplexer Scale Removal Device |
JP2001062489A (en) * | 1999-08-31 | 2001-03-13 | Kawasaki Steel Corp | Removing method of deposited scale in dust collecting water circulation line |
KR20010026769A (en) * | 1999-09-08 | 2001-04-06 | 이종훈 | Method for Descaling of Boiler Using Organic Acids |
KR20020011628A (en) * | 2000-08-03 | 2002-02-09 | 이종훈 | Apparatus for removing plugging from fluidized bed combustor |
JP2003262494A (en) * | 2002-03-07 | 2003-09-19 | Ebara Shinwa Ltd | Scale dissolving and removing method in cooling tower and its device |
KR20040000939A (en) * | 2002-06-26 | 2004-01-07 | 한국전력공사 | The method for removal of scale of gas-gas heat exchanger in flue gas desulfurization system |
KR200363891Y1 (en) * | 2004-07-16 | 2004-10-08 | 한국서부발전 주식회사 | Ash cleaning apparatus of power plant boiler penthouse |
-
2004
- 2004-07-15 KR KR1020040055206A patent/KR20060006278A/en not_active Application Discontinuation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US4079701A (en) * | 1976-05-17 | 1978-03-21 | Westinghouse Electric Corporation | Steam generator sludge removal system |
KR19980017535U (en) * | 1996-09-24 | 1998-07-06 | 김종진 | Steam Turbine Surface Multiplexer Scale Removal Device |
JP2001062489A (en) * | 1999-08-31 | 2001-03-13 | Kawasaki Steel Corp | Removing method of deposited scale in dust collecting water circulation line |
KR20010026769A (en) * | 1999-09-08 | 2001-04-06 | 이종훈 | Method for Descaling of Boiler Using Organic Acids |
KR20020011628A (en) * | 2000-08-03 | 2002-02-09 | 이종훈 | Apparatus for removing plugging from fluidized bed combustor |
JP2003262494A (en) * | 2002-03-07 | 2003-09-19 | Ebara Shinwa Ltd | Scale dissolving and removing method in cooling tower and its device |
KR20040000939A (en) * | 2002-06-26 | 2004-01-07 | 한국전력공사 | The method for removal of scale of gas-gas heat exchanger in flue gas desulfurization system |
KR200363891Y1 (en) * | 2004-07-16 | 2004-10-08 | 한국서부발전 주식회사 | Ash cleaning apparatus of power plant boiler penthouse |
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