CN102435546B - Supercritical autoclave bubbling deoxygenation system - Google Patents
Supercritical autoclave bubbling deoxygenation system Download PDFInfo
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- CN102435546B CN102435546B CN 201110263112 CN201110263112A CN102435546B CN 102435546 B CN102435546 B CN 102435546B CN 201110263112 CN201110263112 CN 201110263112 CN 201110263112 A CN201110263112 A CN 201110263112A CN 102435546 B CN102435546 B CN 102435546B
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Abstract
The invention relates to a hydrochemical control system, and specially, discloses a supercritical autoclave bubbling deoxygenation system. The supercritical autoclave bubbling deoxygenation system comprises a bubbling deoxygenation unit, a monitoring and control unit and a pump-in and pump-out unit. The bubbling deoxygenation unit is provided with a plate with cellular holes, and has the functions of dispersing gas and increasing a water-gas contact area. An inverted valve is arranged at a gas channel outlet of the pump-in and pump-out unit, and thus produced gas can be discharged effectively; oxygen backflow caused by a concentration difference is avoided; and oxygen in water for experiments is effectively removed so that oxygen content is reduced to content below 2ppb. A gas discharging channel is provided with an inverted valve and a peristaltic pump and thus oxygen in air and an aqueous solution can be pumped into the water for experiments so that the oxygen content can be effectively adjusted. The monitoring and control unit adopts a feedback control technology and thus the monitoring and control unit can effectively control and monitor the oxygen content. The supercritical autoclave bubbling deoxygenation system can remove oxygen without heating, and has low energy consumption and high deoxygenation efficiency.
Description
Technical field
The present invention relates to a kind of water chemistry control system, specifically supercritical autoclave bubbling deoxygenation system.
Background technology
The existence of oxygen in water is the main cause of the equipment generation oxygen corrosion such as boiler and heat-net-pipeline, in corrosion test, usually needs test water is carried out to deoxygenation.The at present domestic equipment that also there is no to realize moisturizing continuously, deoxygenation and monitoring water quality under high-temperature and high-pressure conditions, it aspect corrosion test, is mainly the method that adopts heating power exhaust deoxygenation, can't when test run, be that autoclave changes water and Real-Time Monitoring water quality, affect the quality control of test.The dynamic high-pressure still of the cortest company of the U.S., although can be when test run, spent ion exchange resin purifies water, can not deoxygenation.
In the station boiler industrial aspect, main deoxidation method has physical deoxidize, chemical deoxidization, electrochemical deoxidization at present.The report of oxygen-eliminating device is more, the Chinese patent " bubble deoxygenation type hot well device " that is CN2655043 as publication number discloses the deoxygenation problem that a kind of steam turbine feedwater regenerative apparatus solves power station extraction for heat supply steam turbine moisturizing, this device is comprised of hot well shell, baffle plate, bubbling plate, vaporium, other chamber, be characterized in that the top that is positioned at baffle plate is provided with envelope vapour water spraying tray, the bubbling plate is provided with uniform mounting hole, but need to heat during its deoxygenation and can not monitor oxygen concentration, and the design of gas discharge runner is not explained, the Chinese patent that publication number is CN1031128 " vacuum deoxygenation equipment and method ", by oxygen-eliminating device, water injection system, pump into pumping out system, the sampling cooling system, the composition such as parameter testing and automatically controlled regulating system, adopt the type of heating such as boiler self water-producing and the softening cold water mix of part, make it reach the boiling temperature under the certain vacuum degree, the gases such as oxygen and carbon dioxide in dissolved water are overflowed, make qualified deaerated water as boiler feedwater, but it can not be controlled oxygen content, need to heat and vacuumize during deoxygenation, and can not realize and being connected of high temperature and high pressure environment.
Supercritical-Pressure Light Water Cooled Reactor is one of the 4th generation of technology such as nuclear energy system, and the thermal efficiency is high, device is simplified, operate in water its thermodynamic critical point (374 ℃, 22.1MPa) on.The characteristic of Supercritical-Pressure Light Water Cooled Reactor has determined no matter take which kind of design proposal, all must develop the material that has good military service performance in the supercritical water of High Temperature High Pressure, all relates to the evaluation to material corrosive nature under super critical condition.Above device all can not meet the requirement of supercritical corrosion test continuous water feeding, for meeting the requirement of supercritical corrosion test continuous water feeding, need the corresponding supercritical corrosion test of development bubbling deoxygenation system, for the supercritical corrosion experiment provides oxygen content controlled experimental water, and the oxygen content of Real-Time Monitoring experimental water, thereby realize the supercritical corrosion test under different oxygen, and improve the quality level of corrosion test.
Summary of the invention
The object of the present invention is to provide a kind of supercritical autoclave bubbling deoxygenation system, this system provides oxygen content controlled experimental water can to the supercritical corrosion experimental provision, and the oxygen content of Real-Time Monitoring experimental water, complete the supercritical corrosion test under different oxygen.
Technical scheme of the present invention is as follows:
Supercritical autoclave bubbling deoxygenation system, comprise bubbling deoxygenation unit, measurement and control unit and pump into and pump unit; Be provided with honeycomb orifice plate, liquid level gauge and floating ball type liquid level sensor in the deoxygenation water tank of bubbling deoxygenation unit; Be provided with ebullator and oxygen table in measurement and control unit, be connected with ebullator by the threeway introduction pipe in the bottom of water tank, be connected with the top of water tank through the oxygen table, form closed circuit; Be provided with in described measurement and control unit and concentrate on the oxygen table display be connected with the oxygen table by shielded conductor on control panel, the water level display be connected with floating ball type liquid level sensor, the temperature indicator be connected with thermopair and the pressure display unit be connected with tensimeter; It is characterized in that: be provided with venting check valve on the gas exhaust runner of the bubbling deoxygenation unit of described deaerating type of cycles, in tank top, be provided with peristaltic pump, admission line is connected with peristaltic pump; Be provided with the backfeed loop be connected to form by signal feedback controller and electronic air intake control valve and oxygen table in described measurement and control unit; Also be provided with the signal feedback control display be connected with the signal feedback controller by shielded conductor, the gas flow display be connected with gas meter on the control panel of measurement and control unit; Gas flow is taken into account the motor-operated control valve switch and is connected with electronic air intake control valve with gas meter respectively by shielded conductor; Be provided with described pumping in pumping unit the single interface type regenerative heat exchanger be connected with heat exchanger with supercritical autoclave.
Its supplementary features are:
Each display on described deaerating type of cycles measurement and control unit control panel is equipped with the FPDP that can be connected with computer.
Effect of the present invention is: because the gas flow outlet is provided with non-return valve, bubbing is effectively discharged, prevent that the oxygen caused because of concentration difference from refluxing; Be provided with feedback control loop in measurement and control unit, can regulate the oxygen content of Control experiment water and the oxygen content of continuous monitoring test water, improved the quality level of corrosion test.The present invention does not need heating to get final product deoxygenation, and energy consumption is low, and oxygen removal efficiency is high, can effectively remove the oxygen in experimental water, and oxygen content is down to below 2ppb.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of measurement and control unit control panel of the present invention.
In figure: 1. nitrogen cylinder; 2. gas meter; 3. electronic air intake control valve; 4. water tank; 5. honeycomb orifice plate; 6. venting check valve; 7. counterbalance valve; 8. liquid level gauge; 9. floating ball type liquid level sensor; 10. flange end socket; 11. draining valve; 12. ebullator; 13. oxygen table; 14. signal feedback controller; 15. peristaltic pump; 16. high-pressure pump; 17. damper; 18. single interface type regenerative heat exchanger; 19. supercritical autoclave; 20. heat exchanger; 21. counterbalance valve; 22. thermopair; 23. tensimeter; 24. oxygen table display; 25. signal feedback is controlled display; 26. gas flow display; 27. water level display; 28. temperature indicator; 29. pressure display unit; 30. total power switch; 31. ebullator switch; 32. gas flow is taken into account the motor-operated control valve switch; 33. high-pressure pump switch; 34. admission line; 35. grate flow channel; 36. feed pot.
Embodiment
As shown in Figure 1 and Figure 2, the present invention is by bubbling deoxygenation unit, measurement and control unit with pump into and pump unit and form.
Bubbling deoxygenation unit: formed by nitrogen cylinder 1, gas meter 2, electronic air intake control valve 3, water tank 4, honeycomb orifice plate 5, venting check valve 6, counterbalance valve 7, liquid level gauge 8, liquid level sensor 9, flange end socket 10, draining valve 11, peristaltic pump 15, admission line 34, grate flow channel 35 and feed pot 36.Nitrogen cylinder 1 bottleneck by reduction valve, with plastic tube, be connected, through the gas meter 2 on water tank 4 sides and the bottom that electronic air intake control valve 3 is connected to water tank 4, bottom inlet place at water tank 4 is provided with honeycomb orifice plate 5, in order to disperse bubbled gas, increase the contact area of water and gas, fully contact absorption oxygen wherein with water, connect plastic tube grate flow channel 35 at water tank 4 tops, and connect with venting check valve 6 and counterbalance valve 7, prevent that the oxygen caused because of concentration difference from refluxing, and reaches the purpose of deoxygenation; Liquid level gauge 8 and floating ball type liquid level sensor 9 are arranged on water tank 4, in order to detect the water yield of water tank 4, floating ball type liquid level sensor 9 is connected with the water level display 27 of control panel by shielded conductor, the flange end socket 10 at water tank 4 tops is for sealing radiator, bottom at water tank 4 also is provided with the drainage pipeline be connected with draining valve 11, for draining and the moisturizing of water tank 4; Be provided with peristaltic pump 15 at the top of water tank 4, admission line 34 is connected with peristaltic pump 15, the oxygen in air or feed pot 36 can be pumped in water tank 4, plays the effect of oxygenating.
Measurement and control unit: by water tank 4, ebullator 12, oxygen table 13, signal feedback controller 14, oxygen table display 24, signal feedback control display 25, gas flow display 26, water level display 27, temperature indicator 28, pressure display unit 29, total power switch 30, ebullator switch 31, gas flow takes into account motor-operated control valve switch 32 and high-pressure pump switch 33 forms.Drawing a plastic conduit in the bottom of water tank 4 by threeway is connected with ebullator 12, through peroxide table 13, with the top of water tank 4, be connected, form closed circuit, in closed circuit, oxygen table 13 can be measured the oxygen content in water in real time, and signal is passed to feedback controller 14, control the switch of electronic air intake control valve 3.Signal feedback controller 14 is connected to form backfeed loop by shielded conductor and electronic air intake control valve 3 and oxygen table 13; By oxygen table 13, feedback controller 14 and the feedback control loop that electronic air intake control valve 3 forms, by shielded conductor, be connected with transmission of signal; Be provided with in measurement and control unit and concentrate on the oxygen table display 24 be connected with oxygen table 13 by shielded conductor on control panel, the signal feedback be connected with signal feedback controller 14 control display 25, the gas flow display 26 be connected with gas meter 2, the water level display 27 be connected with floating ball type liquid level sensor 9, the temperature indicator 28 be connected with thermopair 22 and the pressure display unit 29 be connected with tensimeter 23; Gas flow is taken into account motor-operated control valve switch 32 and is connected with electronic air intake control valve 3 with gas meter 2 respectively by shielded conductor; Each display is equipped with the FPDP that can be connected with computer.
Pump into and pump unit: formed by high-pressure pump 16, damper 17, single interface type regenerative heat exchanger 18, autoclave 19, heat exchanger 20, counterbalance valve 21, thermopair 22 and tensimeter 23.
Ebullator 12 in closed circuit is connected with high-pressure pump 16 by the threeway introduction pipe, make deaerated water become high pressure by low pressure, in high-pressure pump 16 exits, by the bite type stainless joint, with stainless-steel tube, be connected, near high-pressure pump 16 outlets, connection damper 17 makes current become steady, connect again single interface type regenerative heat exchanger 18, then the ball face sealing joint by the Inconel625 material is connected with autoclave 19, thermopair 22 on its kettle cover and tensimeter 23 can be measured the temperature and pressure of autoclave 19, and by the temperature indicator 28 of shielded conductor and control panel, pressure display unit 28 connects, single interface type regenerative heat exchanger 18 is connected with supercritical autoclave 19, and be connected with heat exchanger 20 by stainless-steel tube, with counterbalance valve 21, be connected again, the outlet of counterbalance valve 21 is connected with the threeway of closed circuit by a plastic tube, make high-temperature high pressure water become the low-temp low-pressure current and return closed circuit, realize deoxygenation and the continuous monitoring of autoclave test water.
Below in conjunction with drawings and Examples, principle of work of the present invention is described below:
In the present embodiment, use N
2gas is as removing carrier of oxygen, and the supercritical autoclave test temperature is 650 ℃, and test pressure is 25MPa; Test water is deionized water, and initial oxygen content is 2000ppm.Content of the test is: the oxygen content of test water is controlled at respectively to 100ppb, 50ppb and 2ppb, and the oxygen content of continuous monitoring test water.
By pack into 2/3rds deionized water of water tank 4, open the battery main switch 30 of control panel, open again ebullator switch 31, open again high-pressure pump switch 33, by counterbalance valve 21, the pressure of supercritical autoclave 19 is raised to 25MPa, at this moment the water of the water of supercritical autoclave 19 and closed circuit exchanges, open again gas meter 2 and motor-operated control valve switch 31, nitrogen starts the bubbling deoxygenation, at this moment oxygen table display 24 shows that oxygen content is 2000ppm, and descend gradually, desired value at setting signal FEEDBACK CONTROL display 25 is 100ppb, through oxygen content after a while, drop to below 100ppb, signal feedback is controlled display 25 and is cut off electronic air intake control valve 3, gas flow becomes 0, through after a while, the oxygen content of water is stabilized in 100ppb, at this moment autoclave 19 is warmed up to 650 ℃ of beginning corrosion tests.
Adopt above-mentioned same method to realize controlling the desired value of oxygen content 50ppb and 2ppb.Can be in signal feedback controller 14 the target setting oxygen content, and control cut-offfing of electronic gas admittance valve 3 by the signal value of oxygen table 13 feedback, thereby effectively control the oxygen content in water
.
Claims (2)
1. supercritical autoclave bubbling deoxygenation system, comprise bubbling deoxygenation unit, measurement and control unit and pump into and pump unit; Be provided with honeycomb orifice plate (5), liquid level gauge (8) and floating ball type liquid level sensor (9) in the water tank (4) of bubbling deoxygenation unit; Be provided with ebullator (12) and oxygen table (13) in measurement and control unit, be connected with ebullator (12) by the threeway introduction pipe in the bottom of water tank (4), be connected with the top of water tank (4) through oxygen table (13), form closed circuit; Be provided with in described measurement and control unit and concentrate on the oxygen table display (24) be connected with oxygen table (13) by shielded conductor on control panel, the water level display (27) be connected with floating ball type liquid level sensor (9), the temperature indicator (28) be connected with thermopair (22) and the pressure display unit (29) be connected with tensimeter (23); It is characterized in that: be provided with venting check valve (6) on the grate flow channel (35) of the bubbling deoxygenation unit of described deaerating type of cycles, at water tank (4) top, be provided with peristaltic pump (15), admission line (34) is connected with peristaltic pump (15); Be provided with the backfeed loop be connected to form by signal feedback controller (14) and electronic air intake control valve (3) and oxygen table (13) in described measurement and control unit; Also be provided with the signal feedback control display (25) be connected with signal feedback controller (14) by shielded conductor, the gas flow display (26) be connected with gas meter (2) on the control panel of measurement and control unit; Gas flow is taken into account motor-operated control valve switch (32) and is connected with electronic air intake control valve (3) with gas meter (2) respectively by shielded conductor; Be provided with described pumping in pumping unit the single interface type regenerative heat exchanger (18) be connected with heat exchanger (20) with supercritical autoclave (19).
2. according to supercritical autoclave bubbling deoxygenation system claimed in claim 1, it is characterized in that: the oxygen table display (24) on described deaerating type of cycles measurement and control unit control panel, signal feedback control display (25), gas flow display (26), water level display (27), temperature indicator (28), pressure display unit (29) are equipped with the FPDP that can be connected with computer.
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| CN 201110263112 CN102435546B (en) | 2011-09-07 | 2011-09-07 | Supercritical autoclave bubbling deoxygenation system |
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| CN 201110263112 CN102435546B (en) | 2011-09-07 | 2011-09-07 | Supercritical autoclave bubbling deoxygenation system |
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| CN103064437B (en) * | 2012-12-31 | 2015-06-24 | 广东电网公司电力科学研究院 | Device and method for controlling dissolved oxygen in reaction container |
| CN103712905B (en) * | 2013-12-25 | 2016-03-23 | 中国石油大学(华东) | For the experimental system that trace impurity in high temperature and pressure experiment supplements |
| JP6150175B2 (en) * | 2014-05-19 | 2017-06-21 | パナソニックＩｐマネジメント株式会社 | Superheated steam treatment method and apparatus |
| CN106708111A (en) * | 2016-12-29 | 2017-05-24 | 华能国际电力股份有限公司 | Dynamic high-temperature high-pressure steam oxidation test device for controlling oxygen content and use method |
| CN107680696A (en) * | 2017-09-20 | 2018-02-09 | 中国核动力研究设计院 | Supercritical autoclave water chemistry feeds back TT＆C system and its control method |
| CN112924372A (en) * | 2021-02-02 | 2021-06-08 | 上海交通大学 | High flux supercritical CO2Corrosion and online monitoring and voltage stabilization experimental device and method |
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| CN1011062B (en) * | 1988-08-13 | 1991-01-02 | 西北工业大学 | Vacuum deoxygenation equipment and method |
| US5600691A (en) * | 1993-10-29 | 1997-02-04 | General Electric Company | Noble metal doping or coating of crack interior for stress corrosion cracking protection of metals |
| CN101343092A (en) * | 2008-08-22 | 2009-01-14 | 李树生 | Deoxidation energy conservation method by heating energy conservation technological improved apparatus of deoxidation device by heating |
| CN101477843B (en) * | 2008-12-30 | 2011-04-20 | 中国科学院金属研究所 | High temperature high pressure water circulation system |
| CN201852774U (en) * | 2010-09-08 | 2011-06-01 | 中国科学院金属研究所 | High-temperature high-pressure water circulation corrosion experiment system with automatic control function |
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