WO2023246258A1 - Gas detection-based online positioning system and method for leaking pipe of condenser - Google Patents
Gas detection-based online positioning system and method for leaking pipe of condenser Download PDFInfo
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- WO2023246258A1 WO2023246258A1 PCT/CN2023/088921 CN2023088921W WO2023246258A1 WO 2023246258 A1 WO2023246258 A1 WO 2023246258A1 CN 2023088921 W CN2023088921 W CN 2023088921W WO 2023246258 A1 WO2023246258 A1 WO 2023246258A1
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- circulating water
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- condenser
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- 238000001514 detection method Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 277
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 116
- 239000001307 helium Substances 0.000 claims description 20
- 229910052734 helium Inorganic materials 0.000 claims description 20
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 238000007689 inspection Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
-
- 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the present disclosure belongs to the technical field of condenser leak detection, and relates to an online positioning system and method for condenser leakage pipes based on gas detection.
- the condenser is an important piece of equipment for the generator set. When the condenser leaks, the condensate water will be contaminated and the water vapor quality of the thermal system will deteriorate, causing severe corrosion, scaling, and salt accumulation of the thermal system equipment, threatening the safe operation of the unit.
- the existing condenser leakage pipe leakage detection technologies mainly include manual inspection and water injection inspection.
- Manual inspection requires manually entering the condenser water chamber after shutting down to inspect tens of thousands of heat exchange tubes. The maintenance workload is very heavy.
- the manual inspection method should be used to detect leaks. Inside the condenser water chamber Being in a high temperature and high humidity environment, there are major safety issues.
- the water filling inspection requires filling the steam side of the condenser with water. After manually entering the condenser water chamber, observe the leakage of the condenser heat exchange tube and locate the leaking tube. This method can only detect larger leaks. For small leaks, Leakage is ineffective and causes a huge waste of water.
- the leaking half-side condenser When a condenser leaks, the leaking half-side condenser is usually taken out of operation and the circulating water of the condenser on that side is drained. At this time, the unit can carry 75% of the load without shutting down. If the location of the condenser leakage pipe can be found online while the leakage side of the condenser is out of operation and the water is drained, it will greatly save the workload of checking the condenser leakage pipe. Breaking the condenser leakage pipe requires shutting down the machine for manual inspection. The dilemma is of great significance for the unit to resume normal operation as soon as possible and ensure the economic operation of the unit.
- the purpose of this disclosure is to overcome the shortcomings of the above-mentioned prior art and provide an online positioning system and method for a condenser leakage pipe based on gas detection.
- the system and method can be online during the period when the leakage side of the condenser exits operation and releases water. Locate the condenser leakage pipe.
- the online positioning system for condenser leakage pipes based on gas detection in the present disclosure includes an automatic air supply system, a gas extraction detection system and an automatic water release system;
- the automatic air supply system includes a gas supply and air pipe mixing and a mixed gas supply electric shut-off valve;
- the air extraction detection system includes the steam side of the condenser, a vacuum pump, a leak detector air inlet electric shut-off valve, a gas inhaler and a leak detector;
- the automatic water discharge system includes Circulating water inlet electric butterfly valve, circulating water inlet chamber, circulating water outlet chamber, water chamber discharge electric valve, water chamber level gauge and circulating water outlet electric butterfly valve;
- the inlet of the mixed gas supply electric shut-off valve is connected to the gas supply and air pipe mixer, and the outlet of the mixed gas supply electric shut-off valve is connected to the top of the circulating water inlet chamber and the circulating water outlet chamber in the condenser.
- the top is connected; the inlet of the vacuum pump is connected with the air-cooling area on the steam side of the condenser; the outlet of the vacuum pump is connected with the leak detector through the electric inlet electric shut-off valve of the leak detector and the gas inhaler; the electric valve for water discharge in the water chamber is connected with the circulation
- the bottom of the water inlet chamber or the bottom of the circulating water outlet chamber is connected; the circulating water inlet pipe is connected to the circulating water inlet chamber through the circulating water inlet electric butterfly valve, and the circulating water outlet pipe is connected through the circulating water outlet electric butterfly valve It is connected with the circulating water outlet chamber, and the water chamber liquid level gauge is installed in the circulating water inlet chamber or the circulating water outlet chamber.
- the automatic gas supply system also includes a gas supply cylinder, a gas cylinder outlet angle valve, a pressure reducing valve, a gas supply electric shut-off valve, a gas supply flow regulating valve and a flow meter; the outlet of the gas supply cylinder passes through the gas cylinder outlet angle valve in turn , pressure reducing valve, air supply electric shut-off valve, air supply flow regulating valve, flow meter, gas supply and air pipeline mixer and mixed gas supply electric shut-off valve and the top of the circulating water inlet water chamber in the condenser It is connected with the top of the circulating water outlet water chamber.
- the supply air and air duct mixers are Venturi mixers.
- the water chamber discharge electric valve is an electric regulating valve located at the bottom of the circulating water inlet chamber or the circulating water outlet chamber.
- the online positioning method of condenser leakage pipe based on gas detection includes the following steps:
- Gas electric shut-off valve adjust the outlet pressure of the pressure reducing valve to 0.1-0.2MPa, adjust the opening of the air supply flow regulating valve, control the flow rate detected by the flow meter at 100-300L/h, and detect leakage of gas and air in the supply
- the gas and air pipe mixer are mixed according to the preset ratio to locate the leakage pipe and then flow into the circulating water inlet water chamber and the circulating water outlet water chamber;
- the vacuum pump extracts the leak detection gas that leaks to the steam side of the condenser, and then the leak detection gas concentration is detected by the leak detector. Change, when the change value of the leak detection gas concentration of the leak detector exceeds the set value, then the position of the leaking pipe row will be located based on the height detected by the water chamber liquid level meter.
- the leak detection gas is a gas such as helium or hydrogen that has a low content in the air and is easy to detect. Helium is preferred.
- the lowering speed setting value v of the given circulating water level is set to 10-20mm/min;
- the initial opening of the electric water release valve in the given water chamber is 10%-30%;
- N 1-5.
- the leakage detection gas and air are mixed according to a preset ratio in the gas supply and air pipeline mixer into leakage pipe positioning gas Then it flows into the circulating water inlet water chamber and the circulating water outlet water chamber. During this process, the opening of the electric water release valve is controlled to achieve stable drainage on the leakage side of the circulating water. During this process, the air inlet of the leak detector is opened.
- the leak detection gas enters the steam side of the condenser through the leak hole of the leak pipe, that is, when the leak detector
- the location of the leaking pipe row is located based on the height detected by the water chamber liquid level gauge, so that the condenser can be found online while the leakage side of the condenser is exiting operation and draining water.
- the location of the steam boiler leakage pipe this method
- the vacuum pump has a fast pumping speed and can quickly find the location of the condenser leakage pipe
- the gas detection device has high resolution for changes in gas concentration and can find tiny leaks in the condenser heat exchange tube; realizing condenser leakage
- the online automatic leak detection of the tube greatly saves the workload of checking the leakage of the condenser leakage tube, breaks the dilemma of having to stop the condenser leakage tube for manual inspection, and improves work safety.
- Figure 1 is a schematic structural diagram of the condenser leakage pipe online positioning system based on gas detection of the present disclosure
- Figure 2 is a dual-axis curve diagram of the position of the pipe row - the detection value of the helium mass spectrometer leak detector - the height of the leaking pipe row in the present disclosure.
- 1 is the gas supply cylinder
- 2 is the gas cylinder outlet angle valve
- 3 is the pressure reducing valve
- 4 is the gas supply electric shut-off valve
- 5 is the gas supply flow regulating valve
- 6 is the flow meter
- 7 is the gas supply and Air pipeline mixer
- 8 is the electric shut-off valve for mixed gas supply
- 9 is the electric butterfly valve for circulating water inlet
- 10 is the circulating water inlet water chamber
- 11 is the steam side of the condenser
- 12 is the electric water chamber discharge valve
- 13 is the circulating water outlet water chamber
- 14 is the circulating water outlet electric butterfly valve
- 15 is the water chamber level gauge
- 16 is the vacuum pump
- 17 is the leak detector air inlet electric shut-off valve
- 18 is the gas inhaler
- 19 is the leak detector. instrument.
- the online positioning system for condenser leakage pipes based on gas detection described in the present disclosure includes an automatic gas supply system, a gas extraction detection system and an automatic water release system;
- the air extraction detection system includes the steam side of the condenser 11, a vacuum pump 16, a leak detector air inlet electric shut-off valve 17, a gas inhaler 18 and a leak detector 19;
- the water chamber discharge electric valve 12 is connected with the bottom of the circulating water inlet chamber 10 or the bottom of the circulating water outlet chamber 13 .
- the water chamber discharge electric valve 12 is an electric regulating valve. By adjusting the opening of the water chamber discharge electric valve 12, the liquid level reduction speed of the condenser circulating water chamber is controlled. The condensed water on the condenser circulating water side can be completely discharged through it. Dry.
- the online positioning method of condenser leakage pipe based on gas detection includes the following steps:
- the gas supply and air pipe mixer 7 simultaneously introduces the mixed gas of helium and air into the circulating water inlet chamber 10 and the circulating water outlet chamber 13;
- the meter 15 monitors the liquid level change of the circulating water in the condenser, and calculates the decreasing speed of the circulating water level every 60 seconds as vactual , and the lowering speed set value v of the given circulating water level is set to 15mm/min, given The lowering speed deviation value ⁇ v of the circulating water level is 3mm/min.
- ⁇ vactual -15mm/min ⁇ 3mm/min the current opening of the water chamber discharge electric valve 12 remains unchanged.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A gas detection-based online positioning system for a leaking pipe of a condenser, comprising an automatic gas supply system, a gas extraction and detection system, and an automatic drainage system. The automatic gas supply system comprises a supplied gas and air pipeline mixer (7) and a mixed gas supply electric shut-off valve (8); the gas extraction and detection system comprises a condenser steam side (11), a vacuum pump (16), a leak detector gas inlet electric shut-off valve (17), a gas intake device (18), and a leak detector (19); the automatic drainage system comprises a circulating water inlet electric butterfly valve (9), a circulating water inlet water chamber (10), a circulating water outlet water chamber (13), a water chamber drainage electric valve (12), a water chamber liquid level meter (15), and a circulating water outlet electric butterfly valve (14); an inlet of the mixed gas supply electric shut-off valve (8) is communicated with the supplied gas and air pipeline mixer (7), and an outlet of the mixed gas supply electric shut-off valve (8) is communicated with the top of the circulating water inlet water chamber (10) and the top of the circulating water outlet water chamber (13) in the condenser; an inlet of the vacuum pump (16) is communicated with an air cooling region of the condenser steam side (11), and an outlet of the vacuum pump (16) is communicated with the leak detector (19) via the leak detector gas inlet electric shut-off valve (17) and the gas intake device (18); the water chamber drainage electric valve (12) is communicated with the bottom of the circulating water inlet water chamber (10) or the bottom of the circulating water outlet water chamber (13); a circulating water inlet pipe is communicated with the circulating water inlet water chamber (10) via the circulating water inlet electric butterfly valve (9), a circulating water outlet pipe is communicated with the circulating water outlet water chamber (13) via the circulating water outlet electric butterfly valve(14), and the water chamber liquid level meter (15) is provided outside the circulating water inlet water chamber (10) or the circulating water outlet water chamber (13). The present invention further provides a gas detection-based online positioning method for a leaking pipe of a condenser.
Description
本公开属于凝汽器检漏技术领域，涉及一种基于气体检测的凝汽器泄漏管在线定位系统及方法。The present disclosure belongs to the technical field of condenser leak detection, and relates to an online positioning system and method for condenser leakage pipes based on gas detection.
凝汽器是发电机组的重要设备，当凝汽器发生泄漏后，会导致凝结水被污染，热力系统水汽品质恶化，造成热力系统设备严重腐蚀、结垢、积盐，威胁机组的安全运行。The condenser is an important piece of equipment for the generator set. When the condenser leaks, the condensate water will be contaminated and the water vapor quality of the thermal system will deteriorate, causing severe corrosion, scaling, and salt accumulation of the thermal system equipment, threatening the safe operation of the unit.
现有凝汽器泄漏管查漏技术主要有人工排查和灌水检查两种。人工排查需要停机后人工进入凝汽器水室对上万根换热管进行排查，检修工作量非常大，当凝汽器半侧运行时应用人工排查方法进行查漏，凝汽器水室内部处于高温、高湿环境，存在较大安全问题。灌水检查需要在凝汽器汽侧灌满水，人工进入凝汽器水室后观察凝汽器换热管的漏水情况定位泄漏管，该方法仅能检查出较大的漏点，对于微小的泄漏无能为力，且会造成水资源的大量浪费。The existing condenser leakage pipe leakage detection technologies mainly include manual inspection and water injection inspection. Manual inspection requires manually entering the condenser water chamber after shutting down to inspect tens of thousands of heat exchange tubes. The maintenance workload is very heavy. When the condenser is running on one side, the manual inspection method should be used to detect leaks. Inside the condenser water chamber Being in a high temperature and high humidity environment, there are major safety issues. The water filling inspection requires filling the steam side of the condenser with water. After manually entering the condenser water chamber, observe the leakage of the condenser heat exchange tube and locate the leaking tube. This method can only detect larger leaks. For small leaks, Leakage is ineffective and causes a huge waste of water.
当凝汽器发生泄漏时，通常会将发生泄漏的半侧凝汽器退出运行并放掉该侧凝汽器的循环水，此时机组可带75％负荷，不需要停机。如果能够在凝汽器泄漏侧退出运行并放水的期间在线找出凝汽器泄漏管的位置，将极大节省凝汽器泄漏管查漏的工作量，打破凝汽器泄漏管必须停机人工排查的窘境，对于机组尽快恢复正常运行，保障机组经济运行具有重大意义。When a condenser leaks, the leaking half-side condenser is usually taken out of operation and the circulating water of the condenser on that side is drained. At this time, the unit can carry 75% of the load without shutting down. If the location of the condenser leakage pipe can be found online while the leakage side of the condenser is out of operation and the water is drained, it will greatly save the workload of checking the condenser leakage pipe. Breaking the condenser leakage pipe requires shutting down the machine for manual inspection. The dilemma is of great significance for the unit to resume normal operation as soon as possible and ensure the economic operation of the unit.
发明内容
Contents of the invention
本公开的目的在于克服上述现有技术的缺点，提供了一种基于气体检测的凝汽器泄漏管在线定位系统及方法，该系统及方法能够在凝汽器泄漏侧退出运行并放水的期间在线找出凝汽器泄漏管的位置。The purpose of this disclosure is to overcome the shortcomings of the above-mentioned prior art and provide an online positioning system and method for a condenser leakage pipe based on gas detection. The system and method can be online during the period when the leakage side of the condenser exits operation and releases water. Locate the condenser leakage pipe.
为达到上述目的，本公开所述的基于气体检测的凝汽器泄漏管在线定位系统包括自动供气系统、抽气检测系统及自动放水系统；所述自动供气系统包括供气和空气管道混合器及混合气供气电动关断阀；所述抽气检测系统包括凝汽器汽侧、真空泵、检漏仪进气电动关断阀、气体吸入器及检漏仪；所述自动放水系统包括循环水进水电动蝶阀、循环水进水水室、循环水出水水室、水室放水电动阀、水室液位计及循环水出水电动蝶阀；In order to achieve the above purpose, the online positioning system for condenser leakage pipes based on gas detection in the present disclosure includes an automatic air supply system, a gas extraction detection system and an automatic water release system; the automatic air supply system includes a gas supply and air pipe mixing and a mixed gas supply electric shut-off valve; the air extraction detection system includes the steam side of the condenser, a vacuum pump, a leak detector air inlet electric shut-off valve, a gas inhaler and a leak detector; the automatic water discharge system includes Circulating water inlet electric butterfly valve, circulating water inlet chamber, circulating water outlet chamber, water chamber discharge electric valve, water chamber level gauge and circulating water outlet electric butterfly valve;
混合气供气电动关断阀的入口与供气和空气管道混合器连通，混合气供气电动关断阀的出口与凝汽器中循环水进水水室的顶部及循环水出水水室的顶部相连通；真空泵的入口与凝汽器汽侧的空冷区相连通，真空泵的出口经检漏仪进气电动关断阀及气体吸入器与检漏仪相连通；水室放水电动阀与循环水进水水室的底部或者循环水出水水室的底部相连通；循环水进水管道经循环水进水电动蝶阀与循环水进水水室相连通，循环水出水管经循环水出水电动蝶阀与循环水出水水室相连通，水室液位计设置于循环水进水水室或者循环水出水水室外。The inlet of the mixed gas supply electric shut-off valve is connected to the gas supply and air pipe mixer, and the outlet of the mixed gas supply electric shut-off valve is connected to the top of the circulating water inlet chamber and the circulating water outlet chamber in the condenser. The top is connected; the inlet of the vacuum pump is connected with the air-cooling area on the steam side of the condenser; the outlet of the vacuum pump is connected with the leak detector through the electric inlet electric shut-off valve of the leak detector and the gas inhaler; the electric valve for water discharge in the water chamber is connected with the circulation The bottom of the water inlet chamber or the bottom of the circulating water outlet chamber is connected; the circulating water inlet pipe is connected to the circulating water inlet chamber through the circulating water inlet electric butterfly valve, and the circulating water outlet pipe is connected through the circulating water outlet electric butterfly valve It is connected with the circulating water outlet chamber, and the water chamber liquid level gauge is installed in the circulating water inlet chamber or the circulating water outlet chamber.
自动供气系统还包括供气气瓶、气瓶出口角阀、减压阀、供气电动关断阀、供气流量调节阀及流量计；供气气瓶的出口依次经气瓶出口角阀、减压阀、供气电动关断阀、供气流量调节阀、流量计、供气和空气管道混合器及混合气供气电动关断阀与凝汽器中循环水进水水室的顶部
及循环水出水水室的顶部相连通。The automatic gas supply system also includes a gas supply cylinder, a gas cylinder outlet angle valve, a pressure reducing valve, a gas supply electric shut-off valve, a gas supply flow regulating valve and a flow meter; the outlet of the gas supply cylinder passes through the gas cylinder outlet angle valve in turn , pressure reducing valve, air supply electric shut-off valve, air supply flow regulating valve, flow meter, gas supply and air pipeline mixer and mixed gas supply electric shut-off valve and the top of the circulating water inlet water chamber in the condenser It is connected with the top of the circulating water outlet water chamber.
供气和空气管道混合器为文丘里混合器。The supply air and air duct mixers are Venturi mixers.
水室放水电动阀为电动调节阀，位于循环水进水水室或者循环水出水水室的底部。The water chamber discharge electric valve is an electric regulating valve located at the bottom of the circulating water inlet chamber or the circulating water outlet chamber.
本公开所述的基于气体检测的凝汽器泄漏管在线定位方法包括以下步骤：The online positioning method of condenser leakage pipe based on gas detection according to the present disclosure includes the following steps:
当凝汽器发生泄漏侧后，则关闭循环水进水电动蝶阀及循环水出水电动蝶阀，隔离泄漏侧凝汽器，打开混合气供气电动关断阀，打开气瓶出口角阀，打开供气电动关断阀，调节减压阀的出口压力至0.1-0.2MPa，调节供气流量调节阀的开度，控制流量计检测的流量在100-300L/h，检漏气体和空气在供气和空气管道混合器中按照预设比例混合为泄漏管定位气体后通入循环水进水水室及循环水出水水室中；When a leak occurs in the condenser, close the circulating water inlet electric butterfly valve and the circulating water outlet electric butterfly valve, isolate the leaking condenser, open the mixed gas supply electric shut-off valve, open the cylinder outlet angle valve, and open the gas supply. Gas electric shut-off valve, adjust the outlet pressure of the pressure reducing valve to 0.1-0.2MPa, adjust the opening of the air supply flow regulating valve, control the flow rate detected by the flow meter at 100-300L/h, and detect leakage of gas and air in the supply The gas and air pipe mixer are mixed according to the preset ratio to locate the leakage pipe and then flow into the circulating water inlet water chamber and the circulating water outlet water chamber;
在向循环水进水水室及循环水出水水室内供气的同时，打开水室放水电动阀，给定水室放水电动阀的初始开度，通过水室液位计监测凝汽器循环水液位的变化，每隔第一预设时间计算该时间段内循环水液位的降低速度v实际，给定循环水液位的降低速度设定值v设定，给定循环水液位的降低速度偏差值Δv，当∣v实际-v设定∣≤Δv时，则保持水室放水电动阀的当前开度不变，当∣v实际-v设定∣＞Δv时，当v实际>v设定，则每隔第二预设时间关小N％水室放水电动阀的开度，当v实际<v设定，则每隔第三预设时间开大N％水室放水电动阀的开度，以保持循环水液位的降低速度稳定；While supplying air to the circulating water inlet chamber and the circulating water outlet chamber, open the water chamber electric valve for water discharge. Given the initial opening of the water chamber electric valve for water discharge, monitor the condenser circulating water through the water chamber liquid level gauge. For changes in liquid level, calculate the lowering speed vactual of the circulating water level within this time period every first preset time. Given the lowering speed set value v of the circulating water level, the given circulating water level Reduce the speed deviation value Δv. When ∣vactual -v is set∣≤Δv , keep the current opening of the water chamber water discharge electric valve unchanged. When ∣vactual -v is set∣ >Δv, when vact > If v is set , then the opening of the water chamber water discharge electric valve will be closed by N% every second preset time. When v actually < v is set , then N% of the water chamber water discharge electric valve will be opened every third preset time. opening to maintain a stable lowering speed of the circulating water level;
在循环水进水水室及循环水出水水室放水的同时，打开检漏仪进气电动关断阀，启动气体吸入器及检漏仪，当循环水液位降低到泄漏管排
所在位置时，则检漏气体通过泄漏管的泄漏孔进入凝汽器汽侧，真空泵将泄漏至凝汽器汽侧的检漏气体抽出，再通过检漏仪检测检漏气体浓度的变化，当检漏仪检漏气体浓度的变化值超过设定值后，则此时根据水室液位计检测的高度定位泄漏管排所在位置。While discharging water from the circulating water inlet chamber and circulating water outlet chamber, open the air inlet electric shut-off valve of the leak detector, start the gas inhaler and leak detector, when the circulating water level drops to the leakage pipe discharge position, the leak detection gas enters the steam side of the condenser through the leak hole of the leak pipe. The vacuum pump extracts the leak detection gas that leaks to the steam side of the condenser, and then the leak detection gas concentration is detected by the leak detector. Change, when the change value of the leak detection gas concentration of the leak detector exceeds the set value, then the position of the leaking pipe row will be located based on the height detected by the water chamber liquid level meter.
检漏气体为氦气或氢气等在空气中含量较低且便于检测的气体，优选氦气。The leak detection gas is a gas such as helium or hydrogen that has a low content in the air and is easy to detect. Helium is preferred.
给定循环水液位的降低速度设定值v设定为10-20mm/min；The lowering speed setting value v of the given circulating water level is set to 10-20mm/min;
每隔30-60s计算循环水液位的降低速度v实际；Calculate the decreasing speed vactual of circulating water level every 30-60s;
给定水室放水电动阀的初始开度为10％-30％；The initial opening of the electric water release valve in the given water chamber is 10%-30%;
每隔10-30s关小1-5％水室放水电动阀的开度；Reduce the opening of the water chamber water discharge electric valve by 1-5% every 10-30 seconds;
每隔10-30s开大1-5％水室放水电动阀的开度；Open the water chamber water discharge electric valve by 1-5% every 10-30 seconds;
N为1-5。N is 1-5.
本公开具有以下有益效果：The disclosure has the following beneficial effects:
本公开所述的基于气体检测的凝汽器泄漏管在线定位系统及方法在具体操作时，将检漏气体和空气在供气和空气管道混合器中按照预设比例混合为泄漏管定位气体后通入循环水进水水室及循环水出水水室中，此时过程中，控制放水电动阀的开度，实现循环水泄漏侧的稳定排水，在此过程中，打开检漏仪进气电动关断阀，启动气体吸入器及检漏仪，循环水液位降低到泄漏管排所在位置时，则检漏气体通过泄漏管的泄漏孔进入凝汽器汽侧，即当检漏仪检漏气体浓度的变化值超过设定值后，则此时根据水室液位计检测的高度定位泄漏管排所在位置，从而在凝汽器泄漏侧退出运行并放水的期间在线找出凝汽器泄漏管的位置，本方法
真空泵抽气速度快，能够快速找出凝汽器泄漏管排位置；气体检测装置对于气体浓度变化的分辨率高，能够找出凝汽器换热管微小的漏点；实现了凝汽器泄漏管的在线自动查漏，极大节省凝汽器泄漏管查漏的工作量，打破凝汽器泄漏管必须停机人工排查的窘境，提高工作安全性。During specific operation of the condenser leakage pipe online positioning system and method based on gas detection described in the present disclosure, the leakage detection gas and air are mixed according to a preset ratio in the gas supply and air pipeline mixer into leakage pipe positioning gas Then it flows into the circulating water inlet water chamber and the circulating water outlet water chamber. During this process, the opening of the electric water release valve is controlled to achieve stable drainage on the leakage side of the circulating water. During this process, the air inlet of the leak detector is opened. Electric shut-off valve, start the gas inhaler and leak detector, when the circulating water level drops to the position of the leak pipe row, the leak detection gas enters the steam side of the condenser through the leak hole of the leak pipe, that is, when the leak detector After the change value of the leak detection gas concentration exceeds the set value, the location of the leaking pipe row is located based on the height detected by the water chamber liquid level gauge, so that the condenser can be found online while the leakage side of the condenser is exiting operation and draining water. The location of the steam boiler leakage pipe, this method The vacuum pump has a fast pumping speed and can quickly find the location of the condenser leakage pipe; the gas detection device has high resolution for changes in gas concentration and can find tiny leaks in the condenser heat exchange tube; realizing condenser leakage The online automatic leak detection of the tube greatly saves the workload of checking the leakage of the condenser leakage tube, breaks the dilemma of having to stop the condenser leakage tube for manual inspection, and improves work safety.
图1为本公开的基于气体检测的凝汽器泄漏管在线定位系统的结构示意图；Figure 1 is a schematic structural diagram of the condenser leakage pipe online positioning system based on gas detection of the present disclosure;
图2为本公开中管排位置-氦质谱检漏仪检测值-泄漏管排高度双坐标轴曲线图。Figure 2 is a dual-axis curve diagram of the position of the pipe row - the detection value of the helium mass spectrometer leak detector - the height of the leaking pipe row in the present disclosure.
其中，1为供气气瓶、2为气瓶出口角阀、3为减压阀、4为供气电动关断阀、5为供气流量调节阀、6为流量计、7为供气和空气管道混合器、8为混合气供气电动关断阀、9为循环水进水电动蝶阀、10为循环水进水水室、11为凝汽器汽侧、12为水室放水电动阀、13为循环水出水水室、14为循环水出水电动蝶阀、15为水室液位计、16为真空泵、17为检漏仪进气电动关断阀、18为气体吸入器、19为检漏仪。Among them, 1 is the gas supply cylinder, 2 is the gas cylinder outlet angle valve, 3 is the pressure reducing valve, 4 is the gas supply electric shut-off valve, 5 is the gas supply flow regulating valve, 6 is the flow meter, 7 is the gas supply and Air pipeline mixer, 8 is the electric shut-off valve for mixed gas supply, 9 is the electric butterfly valve for circulating water inlet, 10 is the circulating water inlet water chamber, 11 is the steam side of the condenser, 12 is the electric water chamber discharge valve, 13 is the circulating water outlet water chamber, 14 is the circulating water outlet electric butterfly valve, 15 is the water chamber level gauge, 16 is the vacuum pump, 17 is the leak detector air inlet electric shut-off valve, 18 is the gas inhaler, and 19 is the leak detector. instrument.
为了使本技术领域的人员更好地理解本公开方案，下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分的实施例，不是全部的实施例，而并非要限制本公开中的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要的混淆本公开中的概念。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下
所获得的所有其他实施例，都应当属于本公开保护的范围。In order to enable those skilled in the art to better understand the present disclosure, the following will clearly and completely describe the technical solutions in the present disclosure embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only The embodiments are part of the disclosure, not all embodiments, and are not intended to limit the scope of the disclosure. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessary confusion of concepts in the present disclosure. Based on the embodiments in this disclosure, those of ordinary skill in the art can All other embodiments obtained should fall within the scope of protection of this disclosure.
在附图中示出了根据本公开中实施例的结构示意图。这些图并非是按比例绘制的，其中为了清楚表达的目的，放大了某些细节，并且可能省略了某些细节。图中所示出的各种区域、层的形状及它们之间的相对大小、位置关系仅是示例性的，实际中可能由于制造公差或技术限制而有所偏差，并且本领域技术人员根据实际所需可以另外设计具有不同形状、大小、相对位置的区域/层。A schematic structural diagram according to an embodiment of the present disclosure is shown in the accompanying drawings. The drawings are not drawn to scale, with certain details exaggerated and may have been omitted for purposes of clarity. The shapes of the various regions and layers shown in the figures and the relative sizes and positional relationships between them are only exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art will base their judgment on actual situations. Additional regions/layers with different shapes, sizes, and relative positions can be designed as needed.
参考图1及图2，本公开所述的基于气体检测的凝汽器泄漏管在线定位系统包括自动供气系统、抽气检测系统及自动放水系统；Referring to Figures 1 and 2, the online positioning system for condenser leakage pipes based on gas detection described in the present disclosure includes an automatic gas supply system, a gas extraction detection system and an automatic water release system;
所述自动供气系统包括供气气瓶1、气瓶出口角阀2、减压阀3、供气电动关断阀4、供气流量调节阀5、流量计6、供气和空气管道混合器7及混合气供气电动关断阀8；The automatic air supply system includes an air supply cylinder 1, a gas cylinder outlet angle valve 2, a pressure reducing valve 3, an electric air supply shut-off valve 4, an air supply flow regulating valve 5, a flow meter 6, and a mixing air supply and air pipe. 7 and mixed gas supply electric shut-off valve 8;
所述抽气检测系统包括凝汽器汽侧11、真空泵16、检漏仪进气电动关断阀17、气体吸入器18及检漏仪19；The air extraction detection system includes the steam side of the condenser 11, a vacuum pump 16, a leak detector air inlet electric shut-off valve 17, a gas inhaler 18 and a leak detector 19;
所述自动放水系统包括循环水进水电动蝶阀9、循环水进水水室10、循环水出水水室13、水室放水电动阀12、水室液位计15及循环水出水电动蝶阀14。The automatic water discharge system includes a circulating water inlet electric butterfly valve 9, a circulating water inlet water chamber 10, a circulating water outlet chamber 13, a water chamber discharge electric valve 12, a water chamber liquid level gauge 15 and a circulating water outlet electric butterfly valve 14.
供气气瓶1的出口依次经气瓶出口角阀2、减压阀3、供气电动关断阀4、供气流量调节阀5、流量计6、供气和空气管道混合器7及混合气供气电动关断阀8与凝汽器中循环水进水水室10的顶部及循环水出水水室13的顶部相连通，其中，供气和空气管道混合器7为文丘里混合器，在工作时，通过调节供气流量调节阀5，改变查漏气体的流量，继而调节查漏气
体与空气的混合比例。The outlet of the air supply cylinder 1 passes through the cylinder outlet angle valve 2, pressure reducing valve 3, air supply electric shut-off valve 4, air supply flow regulating valve 5, flow meter 6, air supply and air pipeline mixer 7 and mixing The air supply electric shut-off valve 8 is connected to the top of the circulating water inlet chamber 10 and the top of the circulating water outlet chamber 13 in the condenser, where the air supply and air pipe mixer 7 is a Venturi mixer, During work, by adjusting the air supply flow regulating valve 5, the flow rate of the leak detection gas is changed, and then the leak detection gas flow is adjusted. The mixing ratio of body to air.
真空泵16的入口与凝汽器汽侧11的空冷区相连通，真空泵16的出口依次经检漏仪进气电动关断阀17及气体吸入器18与检漏仪19相连通。The inlet of the vacuum pump 16 is connected to the air cooling area of the steam side 11 of the condenser, and the outlet of the vacuum pump 16 is connected to the leak detector 19 through the leak detector inlet electric shut-off valve 17 and the gas inhaler 18.
水室放水电动阀12与循环水进水水室10的底部或者循环水出水水室13的底部相连通。水室放水电动阀12为电动调节阀，通过调节水室放水电动阀12的开度控制凝汽器循环水水室的液位降低速度，凝汽器循环水侧的凝结水可通过其完全排干。The water chamber discharge electric valve 12 is connected with the bottom of the circulating water inlet chamber 10 or the bottom of the circulating water outlet chamber 13 . The water chamber discharge electric valve 12 is an electric regulating valve. By adjusting the opening of the water chamber discharge electric valve 12, the liquid level reduction speed of the condenser circulating water chamber is controlled. The condensed water on the condenser circulating water side can be completely discharged through it. Dry.
循环水进水管道经循环水进水电动蝶阀9与循环水进水水室10相连通，循环水出水管经循环水出水电动蝶阀14与循环水出水水室13，循环水出水水室13内或者循环水进水水室10外设置有水室液位计15。The circulating water inlet pipe is connected to the circulating water inlet chamber 10 through the circulating water inlet electric butterfly valve 9, and the circulating water outlet pipe is connected to the circulating water outlet chamber 13 through the circulating water outlet electric butterfly valve 14. The circulating water outlet chamber 13 Or a water chamber liquid level gauge 15 is provided outside the circulating water inlet water chamber 10 .
本公开所述的基于气体检测的凝汽器泄漏管在线定位方法包括以下步骤：The online positioning method of condenser leakage pipe based on gas detection according to the present disclosure includes the following steps:
当凝汽器发生泄漏侧后，则关闭循环水进水电动蝶阀9及循环水出水电动蝶阀14，隔离泄漏侧凝汽器，打开混合气供气电动关断阀8，打开气瓶出口角阀2，打开供气电动关断阀4，调节减压阀3的出口压力至0.1-0.2MPa，调节供气流量调节阀5的开度，控制流量计6检测的流量在100-300L/h，检漏气体和空气在供气和空气管道混合器7中按照预设比例混合为泄漏管定位气体后通入循环水进水水室10及循环水出水水室13中；When a leak occurs in the condenser, close the circulating water inlet electric butterfly valve 9 and the circulating water outlet electric butterfly valve 14, isolate the leaking side condenser, open the mixed gas supply electric shut-off valve 8, and open the gas cylinder outlet angle valve 2. Open the air supply electric shut-off valve 4, adjust the outlet pressure of the pressure reducing valve 3 to 0.1-0.2MPa, adjust the opening of the air supply flow regulating valve 5, and control the flow rate detected by the flow meter 6 to be 100-300L/h. The leak detection gas and air are mixed according to a preset ratio in the air supply and air pipe mixer 7 to form leakage pipe positioning gas and then flow into the circulating water inlet water chamber 10 and the circulating water outlet water chamber 13;
在向循环水进水水室10及循环水出水水室13内供气的同时，打开水室放水电动阀12，给定水室放水电动阀12的初始开度为10％-30％，通过水室液位计15监测凝汽器循环水液位的变化，每隔30-60s计算循环水液
位的降低速度v实际，给定循环水液位的降低速度设定值v设定为10-20mm/min，给定循环水液位的降低速度偏差值Δv，当∣v实际-v设定∣≤Δv时，则保持水室放水电动阀12的当前开度不变，当∣v实际-v设定∣＞Δv时，当v实际>v设定，则每隔10-30s关小1-5％水室放水电动阀12的开度，当v实际<v设定，则每隔10～30s开大1-5％水室放水电动阀12的开度，以保持循环水液位的降低速度稳定，保证定位偏差的稳定；While supplying air to the circulating water inlet chamber 10 and the circulating water outlet chamber 13, open the electric water chamber discharge valve 12. The initial opening of the water chamber discharge electric valve 12 is given to be 10%-30%. The water chamber liquid level gauge 15 monitors the changes in the circulating water level of the condenser and calculates the circulating water level every 30-60 seconds. The lowering speed vactual of the circulating water level is set to 10-20mm/min. The lowering speed deviation value Δv of the circulating water level is given. When ∣vactual -v is set When ∣≤Δv, the current opening of the water chamber water discharge electric valve 12 remains unchanged. When ∣v actual - v setting∣ >Δv, when v actual > v setting , then turn it down by 1 every 10-30s. -5% opening of the water chamber water discharge electric valve 12. When vactual <v setting , open 1-5% of the water chamber discharge electric valve 12 every 10 to 30 seconds to maintain the circulating water level. Reduce the speed stably to ensure the stability of positioning deviation;
在循环水进水水室10及循环水出水水室13放水的同时，打开检漏仪进气电动关断阀17，启动气体吸入器18及检漏仪19，当循环水液位降低到泄漏管排所在位置时，则检漏气体通过泄漏管的泄漏孔进入凝汽器汽侧11，真空泵16将泄漏至凝汽器汽侧11的检漏气体抽出，再通过检漏仪19检测检漏气体浓度的变化，当检漏仪19检漏气体浓度的变化值超过设定值后，则此时通过水室液位计15检测的高度定位泄漏管排所在位置。当泄漏侧凝汽器的循环水放水完毕后，则对泄漏换热管进行堵管，检修人员进入凝汽器水室向泄漏管排所在高度的凝汽器各换热管喷入少量检漏气体，根据检漏仪19检测浓度的变化完成泄漏换热管的最终定位，同时堵住泄漏的换热管。While the circulating water inlet chamber 10 and the circulating water outlet chamber 13 are discharging water, open the electric air inlet shut-off valve 17 of the leak detector, start the gas inhaler 18 and the leak detector 19, when the circulating water level drops to the level of leakage When the pipe row is in the position, the leakage detection gas enters the steam side 11 of the condenser through the leakage hole of the leakage pipe. The vacuum pump 16 extracts the leakage detection gas leaked to the steam side 11 of the condenser, and then detects it through the leakage detector 19 Changes in leak detection gas concentration. When the change value of the leak detection gas concentration of the leak detector 19 exceeds the set value, the location of the leaking pipe row is located through the height detected by the water chamber liquid level gauge 15. After the circulating water of the leaking side condenser is drained, the leaking heat exchange tubes are blocked, and the maintenance personnel enter the condenser water chamber and spray a small amount of leakage into each heat exchange tube of the condenser at the height of the leaking tube row. Gas, according to the change in concentration detected by the leak detector 19, the final positioning of the leaking heat exchange tube is completed, and the leaking heat exchange tube is blocked at the same time.
检漏气体为氦气或氢气等在空气中含量较低且便于检测的气体，优选氦气等惰性气体。The leak detection gas is a gas such as helium or hydrogen that has a low content in the air and is easy to detect, and is preferably an inert gas such as helium.
实施例一Embodiment 1
当凝汽器泄漏侧确定后，由运行人员关闭循环水进水电动蝶阀9及循环水出水电动蝶阀14，对泄漏侧进行半侧隔离，确认真空泵16处于开启状态，40L的氦气供气气瓶1的压力>5MPa，气瓶出口角阀2处于开
启状态；After the leakage side of the condenser is determined, the operator closes the circulating water inlet electric butterfly valve 9 and the circulating water outlet electric butterfly valve 14, conducts half-side isolation of the leakage side, confirms that the vacuum pump 16 is in the open state, and 40L helium gas supply gas The pressure of cylinder 1 is >5MPa, and the cylinder outlet angle valve 2 is open. start status;
自动打开混合气供气电动关断阀8及供气电动关断阀4，调节减压阀3的出口压力至0.1MPa，调节供气流量调节阀5的开度，控制流量计6检测的流量在200L/h，供气和空气管道混合器7同时向循环水进水水室10及循环水出水水室13内通入氦气和空气的混合气体；Automatically open the mixed gas supply electric shut-off valve 8 and the gas supply electric shut-off valve 4, adjust the outlet pressure of the pressure reducing valve 3 to 0.1MPa, adjust the opening of the air supply flow regulating valve 5, and control the flow rate detected by the flow meter 6 At 200L/h, the gas supply and air pipe mixer 7 simultaneously introduces the mixed gas of helium and air into the circulating water inlet chamber 10 and the circulating water outlet chamber 13;
在向循环水进水水室10及循环水出水水室13供气的同时，打开水室放水电动阀12，给定水室放水电动阀12的初始开度为30％，通过水室液位计15监测凝汽器循环水的液位变化，每隔60s计算循环水液位的降低速度为v实际，给定循环水液位的降低速度设定值v设定为15mm/min，给定循环水液位的降低速度偏差值Δv为3mm/min，当∣v实际-15mm/min∣≤3mm/min时，则保持水室放水电动阀12的当前开度不变，当∣v实
际-15mm/min∣＞3mm/min时，如果v实际>15mm/min，每隔20s关小2％水室放水电动阀12的开度，如果v实际<15mm/min，则每隔20s开大2％水室放水电动阀12的开度，以保持液位降低速度稳定，保证定位偏差的稳定；While supplying air to the circulating water inlet chamber 10 and the circulating water outlet chamber 13, open the electric water chamber discharge valve 12. The initial opening of the water chamber discharge electric valve 12 is given to be 30%. Through the water chamber liquid level The meter 15 monitors the liquid level change of the circulating water in the condenser, and calculates the decreasing speed of the circulating water level every 60 seconds as vactual , and the lowering speed set value v of the given circulating water level is set to 15mm/min, given The lowering speed deviation value Δv of the circulating water level is 3mm/min. When ∣vactual -15mm/min∣≤3mm/min, the current opening of the water chamber discharge electric valve 12 remains unchanged. When∣vactual -15mm/min∣>3mm/min, if vactual >15mm/min, turn down the opening of 2% water chamber water discharge electric valve 12 every 20s, if vactual <15mm/min, open it up every 20s 2% the opening of the water chamber water discharge electric valve 12 to keep the liquid level lowering speed stable and ensure the stability of the positioning deviation;
在循环水进水水室10及循环水出水水室13放水的同时，打开检漏仪进气电动关断阀17，启动气体吸入器18和氦质谱检漏仪19，当循环水液位降低到泄漏管排所在位置时，氦气通过泄漏管的泄漏孔进入凝汽器汽侧11，真空泵16将氦气抽出并通过氦质谱检漏仪19检测氦气浓度的变化，当氦气浓度的变化值超过设定值后，此时即可通过水室液位计15检测的高度定位泄漏管排所在位置。当泄漏侧凝汽器的循环水放水完毕后对泄漏换热管进行堵管，检修人员进入凝汽器水室，使用氦气带或
者氦气喷枪向泄漏管排所在高度的凝汽器各换热管喷入少量氦气，根据氦质谱检漏仪19检测氦气浓度的变化迅速完成泄漏换热管的最终定位，同时堵住泄漏的换热管。
While the circulating water inlet chamber 10 and the circulating water outlet chamber 13 are discharging water, open the leak detector inlet electric shut-off valve 17, start the gas inhaler 18 and the helium mass spectrometer leak detector 19. When the circulating water level decreases When the position of the leakage pipe row is reached, the helium gas enters the steam side 11 of the condenser through the leakage hole of the leakage pipe. The vacuum pump 16 extracts the helium gas and detects the change of helium gas concentration through the helium mass spectrometer leak detector 19. When the helium gas concentration After the change value exceeds the set value, the location of the leaking pipe row can be located through the height detected by the water chamber liquid level gauge 15. After the circulating water in the leaking side condenser is drained, the leaking heat exchange tube is plugged. The maintenance personnel enter the condenser water chamber and use a helium belt or The helium spray gun injects a small amount of helium into each heat exchange tube of the condenser at the height of the leaking tube row, and the final positioning of the leaking heat exchange tube is quickly completed based on the changes in helium concentration detected by the helium mass spectrometer leak detector 19, and the leaking heat exchange tube is blocked at the same time. Leaking heat exchange tube.
Claims (7)
- 一种基于气体检测的凝汽器泄漏管在线定位系统，其特征在于，包括自动供气系统、抽气检测系统及自动放水系统；所述自动供气系统包括供气和空气管道混合器(7)及混合气供气电动关断阀(8)；所述抽气检测系统包括凝汽器汽侧(11)、真空泵(16)、检漏仪进气电动关断阀(17)、气体吸入器(18)及检漏仪(19)；所述自动放水系统包括循环水进水电动蝶阀(9)、循环水进水水室(10)、循环水出水水室(13)、水室放水电动阀(12)、水室液位计(15)及循环水出水电动蝶阀(14)；An online positioning system for condenser leakage pipes based on gas detection, characterized by including an automatic air supply system, a gas extraction detection system and an automatic water release system; the automatic air supply system includes a gas supply and air pipe mixer (7 ) and mixed gas supply electric shut-off valve (8); the air extraction detection system includes the steam side of the condenser (11), vacuum pump (16), leak detector air inlet electric shut-off valve (17), gas suction (18) and leak detector (19); the automatic water discharge system includes a circulating water inlet electric butterfly valve (9), a circulating water inlet water chamber (10), a circulating water outlet water chamber (13), and a water chamber discharge Electric valve (12), water chamber level gauge (15) and circulating water outlet electric butterfly valve (14);混合气供气电动关断阀(8)的入口与供气和空气管道混合器(7)连通，混合气供气电动关断阀(8)的出口与凝汽器中循环水进水水室(10)的顶部及循环水出水水室(13)的顶部相连通；真空泵(16)的入口与凝汽器汽侧(11)的空冷区相连通，真空泵(16)的出口经检漏仪进气电动关断阀(17)及气体吸入器(18)与检漏仪(19)相连通；水室放水电动阀(12)与循环水进水水室(10)的底部或者循环水出水水室(13)的底部相连通；循环水进水管道经循环水进水电动蝶阀(9)与循环水进水水室(10)相连通，循环水出水管经循环水出水电动蝶阀(14)与循环水出水水室(13)相连通，水室液位计(15)设置于循环水进水水室(10)或者循环水出水水室(13)外。The inlet of the electric mixed gas supply shut-off valve (8) is connected to the gas supply and air pipe mixer (7), and the outlet of the mixed gas supply electric shut-off valve (8) is connected to the circulating water inlet chamber of the condenser. The top of (10) is connected with the top of the circulating water outlet chamber (13); the inlet of the vacuum pump (16) is connected with the air cooling area of the steam side of the condenser (11), and the outlet of the vacuum pump (16) is passed through the leak detector The air intake electric shut-off valve (17) and the gas inhaler (18) are connected with the leak detector (19); the water chamber discharge electric valve (12) is connected to the bottom of the circulating water inlet water chamber (10) or the circulating water outlet. The bottom of the water chamber (13) is connected; the circulating water inlet pipe is connected with the circulating water inlet water chamber (10) through the circulating water inlet electric butterfly valve (9), and the circulating water outlet pipe is connected through the circulating water outlet electric butterfly valve (14) ) is connected with the circulating water outlet chamber (13), and the water chamber level gauge (15) is installed outside the circulating water inlet chamber (10) or the circulating water outlet chamber (13).
- 根据权利要求1所述的基于气体检测的凝汽器泄漏管在线定位系统，其特征在于，自动供气系统还包括供气气瓶(1)、气瓶出口角阀(2)、减压阀(3)、供气电动关断阀(4)、供气流量调节阀(5)及流量计(6)；供气气瓶(1)的出口依次经气瓶出口角阀(2)、减压阀(3)、供气电动关断阀(4)、供气流量调节阀(5)、流量计(6)、供气和空气管道混合器(7)及混合气供气电动关断阀(8)与凝汽器中循环水进水水室(10)的 顶部及循环水出水水室(13)的顶部相连通。The online positioning system for condenser leakage pipes based on gas detection according to claim 1, characterized in that the automatic gas supply system also includes a gas supply cylinder (1), a gas cylinder outlet angle valve (2), and a pressure reducing valve. (3), air supply electric shut-off valve (4), air supply flow regulating valve (5) and flow meter (6); the outlet of the air supply cylinder (1) passes through the cylinder outlet angle valve (2), reducer Pressure valve (3), air supply electric shut-off valve (4), air supply flow regulating valve (5), flow meter (6), air supply and air pipeline mixer (7) and mixed gas supply electric shut-off valve (8) and the circulating water inlet water chamber (10) in the condenser The top is connected with the top of the circulating water outlet chamber (13).
- 根据权利要求1所述的基于气体检测的凝汽器泄漏管在线定位系统，其特征在于，供气和空气管道混合器(7)为文丘里混合器。The online positioning system for condenser leakage pipes based on gas detection according to claim 1, characterized in that the gas supply and air pipe mixer (7) is a Venturi mixer.
- 根据权利要求1所述的基于气体检测的凝汽器泄漏管在线定位系统，其特征在于，水室放水电动阀(12)为电动调节阀，位于循环水进水水室(10)或者循环水出水水室(13)的底部。The online positioning system for condenser leakage pipes based on gas detection according to claim 1, characterized in that the water chamber water discharge electric valve (12) is an electric regulating valve located in the circulating water inlet water chamber (10) or the circulating water The bottom of the outlet water chamber (13).
- 一种基于气体检测的凝汽器泄漏管在线定位方法，其特征在于，基于权利要求2所述的基于气体检测的凝汽器泄漏管在线定位系统，包括以下步骤：A method for online positioning of condenser leakage pipes based on gas detection, characterized in that, based on the online positioning system of condenser leakage pipes based on gas detection according to claim 2, it includes the following steps:当凝汽器发生泄漏侧后，则关闭循环水进水电动蝶阀(9)及循环水出水电动蝶阀(14)，隔离泄漏侧凝汽器，打开混合气供气电动关断阀(8)，打开气瓶出口角阀(2)，打开供气电动关断阀(4)，调节减压阀(3)的出口压力至0.1-0.2MPa，调节供气流量调节阀(5)的开度，控制流量计(6)检测的流量在100-300L/h，检漏气体和空气在供气和空气管道混合器(7)中按照预设比例混合为泄漏管定位气体后通入循环水进水水室(10)及循环水出水水室(13)中；When a leakage occurs in the condenser, close the circulating water inlet electric butterfly valve (9) and the circulating water outlet electric butterfly valve (14), isolate the leaking side condenser, and open the mixed gas supply electric shut-off valve (8). Open the gas cylinder outlet angle valve (2), open the gas supply electric shut-off valve (4), adjust the outlet pressure of the pressure reducing valve (3) to 0.1-0.2MPa, adjust the opening of the gas supply flow regulating valve (5), The flow rate detected by the flow meter (6) is controlled to be 100-300L/h. The leakage detection gas and air are mixed according to the preset ratio in the gas supply and air pipe mixer (7) to locate the leakage pipe and then flow into the circulating water. In the water chamber (10) and the circulating water outlet chamber (13);在向循环水进水水室(10)及循环水出水水室(13)内供气的同时，打开水室放水电动阀(12)，给定水室放水电动阀(12)的初始开度，通过水室液位计(15)监测凝汽器循环水液位的变化，每隔第一预设时间计算该时间段内循环水液位的降低速度v实际，给定循环水液位的降低速度设定值v设定，给定循环水液位的降低速度偏差值Δv，当∣v实际-v设定∣≤Δv时，则保持水室放水电动阀(12)的当前开度不变，当∣v实际-v设定∣＞Δv时，当v实际>v设定，则每隔第二预设时间关小N％水室放水电动阀(12)的开度， 当v实际<v设定，则每隔第三预设时间开大N％水室放水电动阀(12)的开度，以保持循环水液位的降低速度稳定；While supplying air to the circulating water inlet chamber (10) and the circulating water outlet chamber (13), open the electric water chamber discharge valve (12) and set the initial opening of the water chamber discharge electric valve (12). , monitor the change of the circulating water level in the condenser through the water chamber liquid level gauge (15), and calculate the decreasing speed vactual of the circulating water level in the time period every first preset time, given the circulating water level The lowering speed setting value v is set , and the lowering speed deviation value Δv of the circulating water level is given. When ∣vactual -v is set∣≤Δv , the current opening of the water chamber discharge electric valve (12) is maintained. changes, when ∣vactual - vset∣ >Δv, when vactual > vset , then close the opening of the water chamber water discharge electric valve (12) by N% every second preset time, When vactual < vset , the opening of the water chamber water discharge electric valve (12) is increased by N% every third preset time to maintain a stable reduction rate of the circulating water level;在循环水进水水室(10)及循环水出水水室(13)放水的同时，打开检漏仪进气电动关断阀(17)，启动气体吸入器(18)及检漏仪(19)，当循环水液位降低到泄漏管排所在位置时，则检漏气体通过泄漏管的泄漏孔进入凝汽器汽侧(11)，真空泵(16)将泄漏至凝汽器汽侧(11)的检漏气体抽出，再通过检漏仪(19)检测检漏气体浓度的变化，当检漏仪(19)检漏气体浓度的变化值超过设定值后，则此时根据水室液位计(15)检测的高度定位泄漏管排所在位置。While discharging water from the circulating water inlet chamber (10) and the circulating water outlet chamber (13), open the leak detector air inlet electric shut-off valve (17), start the gas inhaler (18) and the leak detector (19) ), when the circulating water level drops to the position of the leakage pipe row, the leakage detection gas enters the steam side of the condenser (11) through the leakage hole of the leakage pipe, and the vacuum pump (16) will leak to the steam side of the condenser ( The leak detection gas is extracted from 11), and then the change in leak detection gas concentration is detected by the leak detector (19). When the change value of the leak detection gas concentration in the leak detector (19) exceeds the set value, then at this time Locate the location of the leaking pipe row according to the height detected by the water chamber liquid level gauge (15).
- 根据权利要求5所述的气体检测的凝汽器泄漏管在线定位方法，其特征在于，检漏气体为氦气或氢气等在空气中含量较低且便于检测的气体，优选氦气。The method for online positioning of condenser leakage tubes for gas detection according to claim 5, wherein the leakage detection gas is helium or hydrogen, which has a low content in the air and is easy to detect, preferably helium.
- 根据权利要求5所述的气体检测的凝汽器泄漏管在线定位方法，其特征在于，给定循环水液位的降低速度设定值v设定为10-20mm/min；The online positioning method of condenser leakage pipe for gas detection according to claim 5, characterized in that the lowering speed setting value v of the given circulating water level is set to 10-20mm/min;每隔30-60s计算循环水液位的降低速度v实际；Calculate the decreasing speed vactual of circulating water level every 30-60s;给定水室放水电动阀(12)的初始开度为10％-30％；The initial opening of the water chamber water discharge electric valve (12) is given to be 10%-30%;每隔10-30s关小1-5％水室放水电动阀(12)的开度；Reduce the opening of the water chamber water discharge electric valve (12) by 1-5% every 10-30 seconds;每隔10-30s开大1-5％水室放水电动阀(12)的开度；Open the water chamber water discharge electric valve (12) by 1-5% every 10-30 seconds;N为1-5。 N is 1-5.
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- 2022-06-23 CN CN202210720227.8A patent/CN114993578A/en active Pending
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- 2023-04-18 WO PCT/CN2023/088921 patent/WO2023246258A1/en unknown
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