CN105203277A - Water injection replacement and pressure maintenance test method for hydrogen storage tank of nuclear power station - Google Patents
Water injection replacement and pressure maintenance test method for hydrogen storage tank of nuclear power station Download PDFInfo
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- CN105203277A CN105203277A CN201510497705.3A CN201510497705A CN105203277A CN 105203277 A CN105203277 A CN 105203277A CN 201510497705 A CN201510497705 A CN 201510497705A CN 105203277 A CN105203277 A CN 105203277A
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Abstract
The invention provides a water injection replacement and pressure maintenance test method for a hydrogen storage tank of nuclear power station. The method comprises the following steps that 1) SED water is filled into the hydrogen storage tank to replace air in the tank; 2) nitrogen is used to carry out pressure maintenance test on the hydrogen storage tank; 3) hydrogen is used to replace in the SED water in the hydrogen storage tank, and blows to discharge pollution till the hydrogen is qualified; and 4) the pressure of hydrogen storage tank is increased for standby. Compared with the prior art, the method in the invention reduces the safety risk and the debugging cost, shortens the debugging period, and is highly safe, economical and practical.
Description
Technical field
The invention belongs to nuclear power station hydrogen gas production and distribution system debugs field, more particularly, the present invention relates to a kind of nuclear power station hydrogen-holder water filling displacement and pressurize test method.
Background technology
Hydrogen gas production in nuclear power station and distribution system, before hydrogen manufacturing, need to replace hydrogen-holder, to guarantee that oxygen content in storage tank is lower than 5PPM, and then guarantee the security of hydrogen storage.
Current published nuclear power projects all adopts nitrogen substitution method.But, because nitrogen molecule quality is 28, suitable with air relative molecular mass 29, therefore need to use a large amount of nitrogen, storage tank could be replaced required oxygen content by the longer time; In addition this system does not design the pipeline be communicated with on-site nitrogen distribution system, and the nitrogen used in replacement process all uses the nitrogen cylinder group of buying, and therefore debugging cost is very high, also there is risk of suffocating simultaneously.Such as, by 50m
3hydrogen-holder to replace oxygen content be about 0.5%, during on-the-spot displacement actual needs carry out 6 displacements can be qualified, so four hydrogen-holders of nuclear power station just need the high pure nitrogen using about 600 bottles of 40L, 12MPa; If carry out the air-tight test of hydrogen-holder simultaneously, make its pressure reach 3.2MPa or higher and carry out pressurize, four hydrogen-holders suppress the high pure nitrogen of minimum needs more than 2,000 bottle of 40L, 12MPa, and once suppress often defective in actual mechanical process, this just needs to consume more nitrogen.From the time, with per hour enter 6 bottles of nitrogen, every days calculated by 10 hours, every day, air inflow was 60 bottles, and so the displacement of four hydrogen-holders and suppressed time just need nearly 50 days, and it is qualified that prerequisite is still once suppressed.
Visible, use nitrogen to replace hydrogen-holder, at least there is following problem: 1) in process of the test, the oxygen content analytical test in nitrogen is inaccurate, is difficult to judge whether displacement completes; 2) follow-up when suppressing because plant issue etc. is difficult to once to suppress qualified, need a large amount of nitrogen so on the one hand, another aspect debug time is very long; 3) there is risk of suffocating in a large amount of nitrogen that uses.The problems referred to above have all had a strong impact on the debug procedures of hydrogen gas production and distribution system.
Summary of the invention
The object of the invention is to: provide a kind of safe, quick, economic nuclear power station hydrogen-holder water filling displacement and pressurize test method, to overcome the deficiency of nitrogen substitution method.
To achieve these goals, the invention provides a kind of nuclear power station hydrogen-holder water filling displacement and pressurize test method, it comprises the following steps:
1) adopt SED water to be full of by hydrogen-holder, displace air wherein;
2) with nitrogen, pressurize test is carried out to hydrogen-holder;
3) adopt the SED water in hydrogen exchange hydrogen-holder, and it is qualified to hydrogen quality to purge blowdown;
4) hydrogen-holder is boosted for subsequent use.
Preferably, the bottom of described hydrogen-holder is provided with blowdown pipeline, and top is provided with exhaust line, step 1) mistake be called: the blowdown pipeline bottom hydrogen-holder is connected with SED water source, in hydrogen-holder, injects SDE water by blowdown pipeline; When after exhaust line water outlet, stop water filling and close exhaust line.
Preferably, the tie point of described exhaust line and hydrogen-holder is positioned at the peak of hydrogen-holder.
Preferably, described hydrogen-holder is provided with admission line, step 2) process be: a, is adjusted to predetermined pressure by the pressure of the reduction valve of female for nitrogen bus-bar pipe, input nitrogen by the nitrogen blanketing valve alignment hydrogen-holder that is connected with admission line, suppress and stop air inlet to dwell pressure; B, the static schedule time, by the manometric reading be connected with hydrogen-holder, confirms that whether the sealing of hydrogen-holder is qualified; C, after suppressing, the exhaust line arranged by hydrogen-holder carries out pressure release to hydrogen-holder.
Preferably, the reduction valve predetermined pressure of the female pipe of described nitrogen bus-bar is set to 3.8MPa, the dwell pressure 3.68MPa of hydrogen-holder; The pressure release of hydrogen-holder requires to be depressed into 0.2MPa for unloading.
Preferably, described step 3) process be: start hydrogen producer produce qualified hydrogen, hydrogen pipeline is entered to inputting hydrogen in the qualified hydrogen-holder of sealing by what be connected with admission line, simultaneously, sewage draining valve on the blowdown pipeline that crack hydrogen-holder is arranged, under the pressure of hydrogen purge, by blowdown pipeline, SED water is discharged hydrogen-holder; After the SED water in hydrogen-holder drains, continue hydrogen purge blowdown, until the hydrogen quality in hydrogen-holder is qualified.
Preferably, in hydrogen-holder before inputting hydrogen, need first on the blowdown pipeline of hydrogen-holder, connects flexible pipe and make interim water-sealed equipment, set up fire prevention control zone simultaneously.
Preferably, described step 3) when carrying out hydrogen purge blowdown, the mode adopting continuous blowdown and periodic blow down to combine carries out blowdown.
Preferably, described step 3) when carrying out hydrogen purge blowdown, by purity and the humidity of sampling line sample analysis chemical examination hydrogen, when the purity of hydrogen be not less than 99.90% and dew point not higher than-10.0 DEG C time, be judged to be that hydrogen quality is qualified.
Preferably, described step 4) process be: after the quality of hydrogen is qualified, closes blowdown pipeline and exhaust line that hydrogen-holder arranges, and the hydrogen in hydrogen-holder boosted to 3.0MPa.
Compared with prior art, nuclear power station hydrogen-holder water filling displacement of the present invention and pressurize test method reduce security risk, have saved debugging cost, shorten the debugging duration, have good security, economy and practicality.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, nuclear power station hydrogen-holder water filling displacement of the present invention and pressurize test method and Advantageous Effects thereof are described in detail, wherein:
Fig. 1 is the structural representation of nuclear power station hydrogen-holder water filling displacement of the present invention and pressurize test method.
Embodiment
In order to make, object of the present invention, technical scheme and Advantageous Effects are more clear to be understood, below in conjunction with the drawings and specific embodiments, is further elaborated to the present invention.Should be understood that, the embodiment described in this instructions is only used to explain the present invention, is not to limit the present invention.
Refer to Fig. 1, nuclear power station hydrogen-holder water filling displacement of the present invention and pressurize test method following steps:
1) adopt SED water (i.e. nuclear island demineralized water distribution system use demineralized water) to be full of by hydrogen-holder 10, displace air wherein, concrete operations are: a, valve-off 674VY, 611VY, 672VY; B, Open valve 605VK, 606VK, 671VY, 676VY, 677VY, 673VY; C, connects Temporary connections at valve 606VK and connects SED water source, injects SDE water by the blowdown pipeline 12 bottom hydrogen-holder 10 to hydrogen-holder 10; D, after the valve 677VY water outlet of the sampling line 16 on exhaust line 14, valve-off 676VY, 677VY, 605VK, 606VK;
2) with nitrogen, pressurize test is carried out to hydrogen-holder 10: a, the reduction valve pressure of female for nitrogen bus-bar pipe is adjusted to predetermined pressure (as 3.8MPa), Open valve 611VZ, 611VY, in hydrogen-holder 10, input nitrogen by the nitrogen blanketing valve line 20 be connected with admission line 18, suppress valve-off 611VZ, 611VY to pressure 3.68MPa; B, the static schedule time (as 4h), observes the manometric reading that exhaust line 14 is arranged, and confirms that whether the sealing of hydrogen-holder 10 is qualified; C, after suppressing, Open valve 672VY, carries out pressure release to 0.2MPa by exhaust line 14, and it is for subsequent use then to close all valves;
3) adopt hydrogen exchange SED water, and blowdown is qualified to hydrogen quality: a, the hydrogen-holder 10 qualified to sealing, connects flexible pipe and makes interim water-sealed equipment after valve 606VK, and sets up fire prevention control zone; B, starts hydrogen producer and produces qualified hydrogen, Open valve 610VY, enter hydrogen pipeline 22 to inputting hydrogen in hydrogen-holder 10 by what be connected with admission line 18; Meanwhile, sewage draining valve 605VK, 606VK of crack hydrogen-holder 10 bottom, under the pressure of hydrogen purge, discharge hydrogen-holder 10 by blowdown pipeline 12 by SED water; C, after the SED water in hydrogen-holder 10 drains, continue hydrogen purge, the mode blowdown (being preferably first rear regular mode continuously) adopting continuous blowdown and periodic blow down to combine, and Open valve 676VY, 677VY, by purity and the humidity of sampling line 16 sample analysis chemical examination hydrogen, until hydrogen quality is qualified, require that the purity of hydrogen is not less than 99.90%, and dew point is not higher than-10.0 DEG C;
4) hydrogen-holder 10 is boosted for subsequent use: after hydrogen purity, humidity are qualified, close valve 605VK, 606VK of blowdown pipeline 12, and the hydrogen in hydrogen-holder 10 is boosted to 3.0MPa.
Known by describing above, nuclear power station hydrogen-holder water filling displacement of the present invention and pressurize test method adopt water filling degassing method to replace hydrogen-holder 10, effectively reduce oxygen content wherein, and then guarantee that the humidity of hydrogen-holder 10 reaches requirement by hydrogen purge (carry out water-sealed equipment, set up fire prevention control zone).
Compared with prior art, the present invention at least has the following advantages: 1) adopt SED water as the middle replacement media of replacing hydrogen storage tank 10, effectively reduce security risk; 2) a large amount of in process of the test use amounts (suppressing of a hydrogen-holder 10 only needs 3 bottles of nitrogen) decreasing nitrogen, shortens debugging cycle minimum 60 days, and saving nitrogen and human cost are up to hundreds thousand of unit; 3) because the corrosion rate of SED water to hydrogen-holder 10 (Q345R) is very low, therefore, it is possible to guarantee to drop to reduced levels to the corrosion of hydrogen-holder 10; 4) release (i.e. the tie point of exhaust line 14 and hydrogen-holder 10) is positioned at the peak of hydrogen-holder 10, therefore when guaranteeing after exhaust line 14 water outlet that hydrogen-holder 10 inside has been full of SED water, effectively ensure that the safe reliability of displacement; 5), when adopting hydrogen exchange SED water, the mode that hydrogen-holder 10 uses continuous blowdown and periodic blow down to combine carries out blowdown, improves the efficiency of blowdown; 6) when adopting hydrogen exchange SED water, add interim water-sealed equipment at blowdown pipeline 12, and be provided with fire prevention control zone, effectively ensure that the security of blowdown.Visible, nuclear power station hydrogen-holder water filling displacement of the present invention and pressurize test method reduce security risk, have saved debugging cost, have had good security, economy and practicality.
According to above-mentioned principle, the present invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. nuclear power station hydrogen-holder water filling displacement and a pressurize test method, is characterized in that, comprise the following steps:
1) adopt SED water to be full of by hydrogen-holder, displace air wherein;
2) with nitrogen, pressurize test is carried out to hydrogen-holder;
3) adopt the SED water in hydrogen exchange hydrogen-holder, and it is qualified to hydrogen quality to purge blowdown;
4) hydrogen-holder is boosted for subsequent use.
2. nuclear power station hydrogen-holder water filling displacement according to claim 1 and pressurize test method, it is characterized in that: the bottom of described hydrogen-holder is provided with blowdown pipeline, top is provided with exhaust line, step 1) mistake be called: the blowdown pipeline bottom hydrogen-holder is connected with SED water source, in hydrogen-holder, injects SDE water by blowdown pipeline; When after exhaust line water outlet, stop water filling and close exhaust line.
3. nuclear power station hydrogen-holder water filling displacement according to claim 2 and pressurize test method, is characterized in that: the tie point of described exhaust line and hydrogen-holder is positioned at the peak of hydrogen-holder.
4. nuclear power station hydrogen-holder water filling displacement according to claim 1 and pressurize test method, it is characterized in that: described hydrogen-holder is provided with admission line, step 2) process be: a, the pressure of the reduction valve of female for nitrogen bus-bar pipe is adjusted to predetermined pressure, input nitrogen by the nitrogen blanketing valve alignment hydrogen-holder that is connected with admission line, suppress and stop air inlet to dwell pressure; B, the static schedule time, by the manometric reading be connected with hydrogen-holder, confirms that whether the sealing of hydrogen-holder is qualified; C, after suppressing, the exhaust line arranged by hydrogen-holder carries out pressure release to hydrogen-holder.
5. nuclear power station hydrogen-holder water filling displacement according to claim 4 and pressurize test method, is characterized in that: the reduction valve predetermined pressure of the female pipe of described nitrogen bus-bar is set to 3.8MPa, the dwell pressure 3.68MPa of hydrogen-holder; The pressure release of hydrogen-holder requires to be depressed into 0.2MPa for unloading.
6. nuclear power station hydrogen-holder water filling displacement according to claim 1 and pressurize test method, it is characterized in that: described step 3) process be: start hydrogen producer produce qualified hydrogen, hydrogen pipeline is entered to inputting hydrogen in the qualified hydrogen-holder of sealing by what be connected with admission line, simultaneously, sewage draining valve on the blowdown pipeline that crack hydrogen-holder is arranged, under the pressure of hydrogen purge, by blowdown pipeline, SED water is discharged hydrogen-holder; After the SED water in hydrogen-holder drains, continue hydrogen purge blowdown, until the hydrogen quality in hydrogen-holder is qualified.
7. nuclear power station hydrogen-holder water filling displacement according to claim 6 and pressurize test method, it is characterized in that: in hydrogen-holder before inputting hydrogen, need first on the blowdown pipeline of hydrogen-holder, connect flexible pipe and make interim water-sealed equipment, set up fire prevention control zone simultaneously.
8. nuclear power station hydrogen-holder water filling displacement according to claim 6 and pressurize test method, is characterized in that: described step 3) when carrying out hydrogen purge blowdown, the mode adopting continuous blowdown and periodic blow down to combine carries out blowdown.
9. nuclear power station hydrogen-holder water filling displacement according to claim 6 and pressurize test method, it is characterized in that: described step 3) when carrying out hydrogen purge blowdown, by purity and the humidity of sampling line sample analysis chemical examination hydrogen, when the purity of hydrogen be not less than 99.90% and dew point not higher than-10.0 DEG C time, be judged to be that hydrogen quality is qualified.
10. nuclear power station hydrogen-holder water filling displacement according to claim 1 and pressurize test method, it is characterized in that: described step 4) process be: after the quality of hydrogen is qualified, close blowdown pipeline and the exhaust line of hydrogen-holder setting, and the hydrogen in hydrogen-holder is boosted to 3.0MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105910765A (en) * | 2016-05-31 | 2016-08-31 | 中国航空工业集团公司西安飞机设计研究所 | Airplane vacuum clean water system air-tightness checking method |
| CN106092463A (en) * | 2016-05-31 | 2016-11-09 | 中国航空工业集团公司西安飞机设计研究所 | A kind of airtight inspection method of aircraft vacuum waste water systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105910765A (en) * | 2016-05-31 | 2016-08-31 | 中国航空工业集团公司西安飞机设计研究所 | Airplane vacuum clean water system air-tightness checking method |
| CN106092463A (en) * | 2016-05-31 | 2016-11-09 | 中国航空工业集团公司西安飞机设计研究所 | A kind of airtight inspection method of aircraft vacuum waste water systems |
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