WO2013129172A1 - タービン設備及びヒータドレイン水の水処理方法 - Google Patents
タービン設備及びヒータドレイン水の水処理方法 Download PDFInfo
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- WO2013129172A1 WO2013129172A1 PCT/JP2013/053923 JP2013053923W WO2013129172A1 WO 2013129172 A1 WO2013129172 A1 WO 2013129172A1 JP 2013053923 W JP2013053923 W JP 2013053923W WO 2013129172 A1 WO2013129172 A1 WO 2013129172A1
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- WIPO (PCT)
- Prior art keywords
- water
- heater
- steam
- turbine
- heater drain
- Prior art date
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Classifications
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/40—Use of two or more feed-water heaters in series
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Definitions
- the present invention relates to a turbine facility, and more particularly to a turbine facility having a mechanism for filtering heater drain water and collecting it in a water supply pipe. Moreover, this invention relates to the water treatment method of the heater drain water in this turbine equipment.
- the generated high-temperature and high-pressure steam is supplied to a turbine, and the turbine is driven by this steam to generate power.
- the steam after driving the turbine is cooled by the condenser and returned to the water state, then heated again, supplied to the boiler, the nuclear reactor, and the steam generator, and reused.
- the extraction from the low-pressure turbine is lower in both temperature and pressure than the extraction from the high-pressure turbine, so the condensate exits the condenser and then passes through the low-pressure heater first, followed by the deaerator, After passing through a economizer, it is circulated again as boiler feed water. Further, the high-pressure heater drain and the low-pressure heater drain generated by condensation in the high-pressure heater and the low-pressure heater, respectively, are led to the condensate main pipe and circulated and used as boiler feed water.
- magnetite film becomes too thick, the heat transfer coefficient decreases.
- magnetite forms a wavy oxide film on the boiler tube surface and increases the flow resistance of boiler water, leading to a decrease in overall energy conversion efficiency.
- the power generation equipment is cleaned once every 3 to 4 years during regular repairs to control excessive growth of the magnetite oxide film, prevent boiler tube corrosion, and reduce heat transfer resistance and water flow resistance. I try to plan.
- CWT Combined Water Treatment
- the combined feed water and makeup water are treated with a deaerator, oxygen and inert gas are removed, and then pure oxygen is added to control the oxygen concentration in the feed water to about 5 ppb.
- oxygen treatment using ammonia together with oxygen was mainstream, but in recent years, oxygen treatment in which only oxygen addition is performed has become mainstream.
- a hematite (Fe 2 O 3 ) layer that is more oxidized than magnetite is formed on the boiler tube surface.
- the hematite layer is very dense, its surface is smoother than the magnetite layer, and does not increase the water flow resistance. Moreover, since the hematite layer is chemically stable and has a high anticorrosive effect, the frequency of chemical cleaning is less than that of AVT. For this reason, the number of boilers to which CWT treatment is applied is increasing even in large-scale thermal power plants in Japan.
- the condensate that exits the turbine is heated by a water heater that uses extracted air as a heat source.
- the drain from the feed water heater joins the condensate and is circulated and used as feed water.
- the pore size of the filter (which may be referred to as an effective filtration pore size) is indicated by an absolute filtration pore size capable of removing particles having a target particle size with a probability of 99% or more.
- iron oxide fine particles in the low-pressure drain are precipitated as chemically dissolved hematite and goethite (FeOOH) particles having low solubility due to oxidation of the dissolved iron in the drain bulk.
- FeOOH chemically dissolved hematite and goethite
- Patent Documents 1 to 3 Technologies for removing iron oxide particles in boiler feed water have been proposed.
- Patent Document 1 describes that condensate is filtered through a membrane having a pore diameter of 0.01 to 0.3 ⁇ m.
- Patent Document 2 describes that condensate is filtered through a membrane having a pore size of 1 ⁇ m. However, these Patent Documents 1 and 2 do not describe filtering the drain of the low-pressure heater.
- Patent Document 3 describes a turbine facility configured to filter a low-pressure heater drain and feed the water to a water supply system, and a method for treating water in the heater drain water in the turbine facility.
- Patent Document 3 when the iron concentration of the drain water exceeds a predetermined concentration, the drain water is discharged out of the system, and only when the iron concentration is low, the iron is removed by a filter and used as a part of boiler feed water. This is basically because fine iron that cannot be filtered is contained in the drain water, and unless the iron concentration is lower than the prescribed concentration, iron is contained beyond the boiler feedwater usage limit even if it is filtered. It is to be done.
- Patent Document 3 in addition to the problem that the facility becomes large, drain water with a high iron content is discharged out of the system, so the recovery rate of water from the heater drain water is low, and the amount of drainage There is a problem of increasing.
- the present invention provides a turbine facility capable of efficiently removing from the heater drain water the iron oxide particle scale that adheres to the inner surface of the boiler tube and causes heat transfer inhibition, and a water treatment method for the heater drain water in the turbine facility. For the purpose.
- the turbine equipment of the present invention includes a boiler that generates steam by heat from a heat source, a steam turbine that operates by steam of the boiler, a condenser that condenses steam from the steam turbine, and a condenser.
- a water supply system that supplies condensed condensate as supply water to the boiler side, and a part of the steam that is interposed in the water supply system and that is supplied from the steam turbine to the reheater is extracted as extraction water.
- the filtration device has a pore diameter of 1 to 5 ⁇ m. It has the filter of.
- the water treatment method for heater drain water in a turbine facility evaporates / superheats boiler feed water with heat from a heat source, operates a steam turbine with generated steam, and condenses steam discharged from the steam turbine.
- the feed water is condensed in a water heater, the feed water is fed to the boiler side, and the feed water is heated in the feed water heater using the extracted air extracted from the steam turbine to be supplied to the reheater.
- the heater drain water generated by cooling the extraction air in the feed water heater is filtered and collected in a feed water system.
- the heater drain water is filtered by a filter having a pore diameter of 1 to 5 ⁇ m. To do.
- the present invention it is preferable to filter the entire amount of the heater drain water and send it to the water supply system.
- a low pressure water heater is preferred as the water heater for filtering the drain water.
- the iron oxide fine particles are efficiently removed from the heater drain water by filtering the heater drain water with a filter having a pore diameter of 1 to 5 ⁇ m, so that the iron oxide fine particles are prevented from adhering to the inner surface of the boiler tube.
- the entire amount of heater drain water can be filtered and sent to the water supply system, and the water recovery rate is increased.
- the effective filtration pore diameter of the filter used is 1 to 5 ⁇ m and is sufficiently captured. It is possible. Since the filtration pore diameter is as large as 1 to 5 ⁇ m and the shape of the fine particles is needle-like, the water pressure loss is unlikely to increase even when continuously used.
- FIG. 1 shows a turbine facility according to an embodiment.
- Water (condensate and makeup water) in a condenser 1 passes through a line 4 through an electromagnetic filter 2 and a pure water device 3 using an ion exchange resin. Then, the water is supplied to the low-pressure water heater 5 and heated. The heated water is sent to the deaerator 7 via the line 6, deaerated, and then heated by the high-pressure water heater 8 and fed to the boiler 9. The steam generated in the boiler 9 is superheated by the superheater 10 and then supplied to the high-pressure turbine 12 via the steam line 11.
- the steam flowing out from the high-pressure turbine 12 is sent to the reheater 14 via the steam line 13, reheated, and then supplied to the low-pressure turbine 16 via the steam line 15. Returned to
- a bleed line 17 is branched from the steam line 13, and a part of the steam is branched from the line 11 and supplied to the heat source side of the low-pressure feed water heater 4 to exchange heat with water and drain water (low-pressure heater drain). Water).
- the low-pressure heater drain water is sent to the filter 19 via the line 18, filtered, and then supplied to the water side of the low-pressure feed water heater 4 via the return line 20.
- the return line 20 may be connected to the inflow side line 4 or the outflow side line 6 of the low-pressure feed water heater 4.
- the filter used in the filter 19 has a pore diameter (effective filtration pore diameter) of 1 to 5 ⁇ m, preferably 1 to 4 ⁇ m, more preferably 2 to 4 ⁇ m, and further preferably 2 to 3 ⁇ m.
- a pore diameter effective filtration pore diameter
- the LV of the filter 19 is preferably about 0.2 to 1.2 m / Hr, particularly about 0.3 to 1.0 m / Hr.
- the filter material is not particularly limited. However, since the low-pressure heater drain water has a temperature of 80 to 130 ° C., it is preferably a material that can withstand use for at least one year at this temperature. Specifically, non-woven fabric made of polyphenylene sulfide fiber or fluororesin fiber is preferably used. When the nonwoven fabric filter is used alone, the fiber layer may be biased due to the accumulation of filter cake or the flow of the filtration fluid, and the predetermined filtration efficiency may not be obtained. Therefore, as a filter, a filter having a three-layer structure in which both surfaces of a nonwoven fabric are sandwiched between spunbond sheets having mechanical strength and embossed to integrate them is suitable.
- the iron oxide fine particles are sufficiently removed from the low-pressure heater drain water, the adhesion of iron oxide fine particles to the inner surface of the boiler tube is prevented (including suppression). Since the entire amount of low-pressure heater drain water is filtered, the water recovery rate is high, and the configuration for passing water through the filter 19 is simple and low-cost.
- the 50 wt% average diameter was 7 to 8 ⁇ m as shown in FIG.
- the cumulative contents of particles having a particle size of 1 ⁇ m or less and particles having a particle size of 5 ⁇ m or less were about 5 wt% and 40 wt%, respectively. From this, it can be seen that even when a filter having an effective filtration pore size of less than 1 ⁇ m is used, the particle capture rate is not improved, and when a filter having an effective filtration pore size of more than 5 ⁇ m is used, the particle capture rate is deteriorated.
- the differential pressure is about 5 kPa, and even if a drain having a concentration of about 20 ⁇ g-Fe / L is passed for one year, the water flow is inhibited. It became clear that no differential pressure increase occurred.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Materials (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
有効濾過孔径が3、1、0.45、0.2、0.1μmである第1ないし第5のメンブレンフィルタを直列に配したユニットに、火力発電所のCWT処理したタービン設備の低圧ヒータドレインを、3μmのメンブレンの方から通水線速度(LV)2.3cm/分にて4Hr通水し、各孔径のフィルタに捕捉された酸化鉄の量の分布を測定した。結果を表1に示す。
ポリフェニレンサルファイド製のメルトブロー法で紡糸した細繊維からなる不織布をスパンボンドシートで挟みエンボス加工したSMSシートを3枚折り込んで製作された直径70mm、濾過面有効長さ25mmのプリーツ型フィルタ(有効濾過孔径2μm)に、125℃(圧力0.25MPa(G))のボイラドレインを580mL/分で通水した。この流入水の全鉄濃度は48μg-Fe/Lであり、プリーツ型フィルタ出口の濾過水中の全鉄濃度は2.0μg-Fe/Lであった。
なお、本出願は、2012年2月29日付で出願された日本特許出願(特願2012-043802)に基づいており、その全体が引用により援用される。
Claims (6)
- 熱源からの熱によって蒸気を発生させるボイラと、
該ボイラの蒸気により作動する蒸気タービンと、
該蒸気タービンからの蒸気を復水する復水器と、
該復水器で凝縮された復水を給水として前記ボイラ側に送給する給水系統と、
該給水系統に介装され、前記蒸気タービンから再熱器に送給する蒸気の一部を抽気として抜出し、これを用いて前記給水を加熱する給水ヒータと、
該給水ヒータから排出されるヒータドレイン水を濾過して前記給水系統に送水して回収する濾過装置とを有するタービン設備において、
該濾過装置は孔径1~5μmのフィルタを有することを特徴とするタービン設備。 - 請求項1において、前記濾過装置は前記ヒータドレイン水の全量を濾過して前記給水系統に送水することを特徴とするタービン設備。
- 請求項1又は2において、前記ヒータドレイン水は低圧ヒータドレイン水であることを特徴とするタービン設備。
- 熱源からの熱によってボイラの給水を蒸発・過熱し、
発生する蒸気により蒸気タービンを作動させ、
該蒸気タービンから排出される蒸気を復水器で凝縮して給水とし、
前記ボイラ側に前記給水を送給し、
前記蒸気タービンから再熱器に送給する蒸気の一部を抜出した抽気を用いて給水ヒータにおいて前記給水を加熱し、
該給水ヒータにおいて前記抽気が冷却されて生成されるヒータドレイン水を濾過し、給水系統に回収するタービン設備におけるヒータドレイン水の水処理方法において、
該ヒータドレイン水を孔径1~5μmのフィルタで濾過することを特徴とするタービン設備におけるヒータドレイン水の水処理方法。 - 請求項4において、前記ヒータドレイン水の全量を前記フィルタで濾過して前記給水系統に回収することを特徴とするタービン設備におけるヒータドレイン水の水処理方法。
- 請求項4又は5において、前記ヒータドレイン水は低圧ヒータドレイン水であることを特徴とするタービン設備におけるヒータドレイン水の水処理方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380010791.XA CN104145160B (zh) | 2012-02-29 | 2013-02-19 | 涡轮机设备和加热器排水的水处理方法 |
IN1824MUN2014 IN2014MN01824A (ja) | 2012-02-29 | 2013-02-19 | |
US14/376,759 US20150033741A1 (en) | 2012-02-29 | 2013-02-19 | Turbine facility and water treatment method for heater drainage water |
KR1020147022631A KR20140136925A (ko) | 2012-02-29 | 2013-02-19 | 터빈 설비 및 히터 드레인수의 수처리 방법 |
Applications Claiming Priority (2)
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JP2012043802A JP5987354B2 (ja) | 2012-02-29 | 2012-02-29 | タービン設備及びヒータドレイン水の水処理方法 |
JP2012-043802 | 2012-02-29 |
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WO2013129172A1 true WO2013129172A1 (ja) | 2013-09-06 |
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PCT/JP2013/053923 WO2013129172A1 (ja) | 2012-02-29 | 2013-02-19 | タービン設備及びヒータドレイン水の水処理方法 |
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US (1) | US20150033741A1 (ja) |
JP (1) | JP5987354B2 (ja) |
KR (1) | KR20140136925A (ja) |
CN (1) | CN104145160B (ja) |
IN (1) | IN2014MN01824A (ja) |
TW (1) | TWI586887B (ja) |
WO (1) | WO2013129172A1 (ja) |
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JP6431383B2 (ja) * | 2015-01-16 | 2018-11-28 | 株式会社東芝 | フラッシュボックス及びそれを備える復水器 |
KR101876129B1 (ko) * | 2017-06-15 | 2018-07-06 | 두산중공업 주식회사 | 필터 자동 세척 장치 및 이를 이용한 필터 자동 세척 방법 및 이를 포함하는 초임계 유체 발전 시스템 |
CN109296415B (zh) * | 2018-10-30 | 2023-08-15 | 华能国际电力股份有限公司 | 一种联合循环冷热电联供机组供汽过热度利用系统 |
JP7286530B2 (ja) * | 2019-12-26 | 2023-06-05 | 三菱重工業株式会社 | 水処理装置及び発電プラント並びに水処理方法 |
US11859811B2 (en) * | 2021-03-09 | 2024-01-02 | The Cleaver-Brooks Company, Inc. | Auxiliary boiler systems and methods of operating and implementing same |
CN113294217A (zh) * | 2021-05-21 | 2021-08-24 | 东方电气集团东方汽轮机有限公司 | 带有小汽机的背压式汽轮机回热系统及热力平衡设计方法 |
CN113431653B (zh) * | 2021-07-23 | 2022-11-04 | 山东丰源生物质发电股份公司 | 汽轮机一级抽汽接带外供工业用汽设备 |
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2012
- 2012-02-29 JP JP2012043802A patent/JP5987354B2/ja active Active
-
2013
- 2013-02-19 WO PCT/JP2013/053923 patent/WO2013129172A1/ja active Application Filing
- 2013-02-19 KR KR1020147022631A patent/KR20140136925A/ko not_active Application Discontinuation
- 2013-02-19 CN CN201380010791.XA patent/CN104145160B/zh active Active
- 2013-02-19 IN IN1824MUN2014 patent/IN2014MN01824A/en unknown
- 2013-02-19 US US14/376,759 patent/US20150033741A1/en not_active Abandoned
- 2013-02-25 TW TW102106597A patent/TWI586887B/zh active
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JPH01156702U (ja) * | 1988-04-19 | 1989-10-27 | ||
JPH09206567A (ja) * | 1996-01-31 | 1997-08-12 | Japan Organo Co Ltd | 発電プラントにおけるヒータドレン水の濾過方法及びその装置 |
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Publication number | Publication date |
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IN2014MN01824A (ja) | 2015-07-03 |
CN104145160B (zh) | 2016-10-12 |
JP5987354B2 (ja) | 2016-09-07 |
TW201350669A (zh) | 2013-12-16 |
KR20140136925A (ko) | 2014-12-01 |
TWI586887B (zh) | 2017-06-11 |
CN104145160A (zh) | 2014-11-12 |
US20150033741A1 (en) | 2015-02-05 |
JP2013181668A (ja) | 2013-09-12 |
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