CN104373339A - Testing device for external characteristics of high-temperature molten salt pump - Google Patents
Testing device for external characteristics of high-temperature molten salt pump Download PDFInfo
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- CN104373339A CN104373339A CN201410708889.9A CN201410708889A CN104373339A CN 104373339 A CN104373339 A CN 104373339A CN 201410708889 A CN201410708889 A CN 201410708889A CN 104373339 A CN104373339 A CN 104373339A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 275
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 99
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000009413 insulation Methods 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 41
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 abstract description 4
- 238000007405 data analysis Methods 0.000 abstract 2
- 238000013480 data collection Methods 0.000 abstract 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 7
- 238000011056 performance test Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- -1 motor shaft export Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
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Abstract
The invention provides a testing device for the external characteristics of a high-temperature molten salt pump. The testing device is mainly used for measuring the external characteristics of the molten salt pump when the molten salt pump conveys high-temperature molten salt. The testing device mainly comprises a power transmission system, a liquid path system, a gas path system, a heating system, a heat insulation heat tracing system and a data collection and analysis system. The power transmission system provides power for stable operation of the molten salt pump. The liquid path system forms a molten salt circulation loop and guarantees that the testing device has high measurement precision and operates safely. The gas path system provides protective gas for the molten salt. The heating system heats the molten salt directly and has the advantage of being efficient. The heat insulation heat tracing system carries out heat insulation through alumina silicate fibers in the mode of combining steam heat tracing and electric heat tracing so as to prevent the molten salt from solidifying. The data collection and analysis system is used for collecting pressure signals, rotation speed signals, flow rate signals, temperature signals, current signals, voltage signals and other signals and analyzing the collected data to obtain the external characteristics of the molten salt pump.
Description
Technical field
The present invention relates to a kind of high-temperature molten salt pump test device, this device is mainly used in the measurement of high-temperature melting salt pump external characteristics.
Background technique
Pump for liquid salts is the pump being used for carrying high-temperature molten salt specially.Medium motion in pump for liquid salts is very complicated, and the design of current pump remains by experience, or the semi-theoretical mode of semiempirical has been come, and these theoretical and experiences are all derive from scientific experimentation and production practices.Therefore, the test of pump for liquid salts all has great importance for the design of pump, production and use.The performance test of pump for liquid salts not only can provide reliable technical basis for the improvement of product and operation, also has extremely important effect to the research and development of pump for liquid salts basic theory, the improvement of pump for liquid salts performance, the innovation etc. of pump for liquid salts design method.
Pump performance test difficulty using water as medium is little, testing apparatus kind is many, but the pump for liquid salts of conveying high-temperature molten salt is because operating temperature high (the highest more than 500 DEG C), and its performance test difficulty is larger, relevant research is less, there is no special testing apparatus at present.Pump for liquid salts manufacturer adopts water to carry out pump for liquid salts performance test to replace fused salt usually, pump performance when obtaining carrying fused salt by conversion again, avoid this difficult problem of high temperature like this, but measuring accuracy being affected, there is certain deviation in the pump performance that conversion obtains and actual performance.At high temperature carry out pump for liquid salts performance test, not only to ensure that whole testing apparatus can at high temperature safe and stable operation, also want each parameter of pump for liquid salts under Measurement accuracy high temperature, as: flow, lift, air horsepower etc., these needs are innovated on apparatus structure and method of measurement.
Summary of the invention
In order to fill up pump for liquid salts conveying high temperature media time device for measuring properties blank, the invention provides a kind of high-temperature melting salt pump external characteristics testing apparatus, this testing apparatus is high temperature resistant, easy to operate, measuring accuracy is high.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of high-temperature melting salt pump external characteristics testing apparatus, this device comprises power transmission system, liquid-way system, air-channel system, heating system, heat tracing insulating system and data acquisition and analysis system;
Described liquid-way system mainly comprises jacket pipe and fused salt tank, and fused salt tank is used for splendid attire fused salt and places pump for liquid salts to be tested, and fused salt tank top is provided with fused salt cover plate, and fused salt pot bottom is provided with drain hole; Fused salt cover plate is also provided with charging aperture, nitrogen inlet, drain, and dissolved salt pump to be tested picks and places hole; Described jacket pipe one end is connected with pump discharge pipe through valve, and the other end inserts fused salt pot sidewall and is communicated with fused salt tank inside, and described pump discharge pipe to be inserted in fused salt tank by fused salt cover plate and to connect pump for liquid salts to be tested outlet;
Described air-channel system comprises nitrogen bottle, reduction valve and flexible pipe, and flexible pipe to be inserted on fused salt cover plate and to be communicated with fused salt tank inside;
Power transmission system mainly comprises motor and transmission shaft, and transmission shaft is inserted in fused salt tank via fused salt tank cover plate for sealing and is connected with pump for liquid salts to be tested, and whole power transmission system is fixed on fused salt cover plate by pump for liquid salts fixed plate.
Described heat tracing insulating system, comprises and is located at pump for liquid salts fixed plate to the electrical tracing structure on valve section pipeline, and be located at the steam tracing structure of chuck pipeline section, and the thermal insulation layer of fused salt tank surrounding, cover plate insulation bag, the thermal insulation layer of pipeline periphery in liquid-way system.
Further design of the present invention is:
Described heating system comprises insertion heater and is wrapped in the electrical heating wire of fused salt tank periphery wall, and electrical heating wire and insertion heater respectively via controller are connected with data acquisition and analysis system.
The pipeline of jacket pipe is U-shaped, and U-tube road tilts 5 °-10 ° installations, and the joint of jacket pipe and fused salt pot sidewall is the minimum point of whole pipeline, and proof test terminates rear ducted fused salt and can all flow back in fused salt tank.
Also be provided with jacket flange and expansion joint in the pipeline of jacket pipe, jacket flange matches with jacket pipe, and steam can circulate in chuck layer, with fully to pipeline companion heat, ensures that line temperature is evenly distributed.Used for expansion joint in counteracting pipeline swelling stress at high temperature, prevent pipeline stress and destroy.
Be provided with reducer pipe between pump for liquid salts outer pipe and valve, a straight length is also installed between reducer pipe and valve.
Described data acquisition and analysis system comprises computer unit and the vortex-shedding meter be connected with computer unit respectively, pump inlet pressure transducer, pump discharge pressure sensor, temperature transducer, speed probe, vortex-shedding meter is located on the pipeline of jacket pipe, pump inlet pressure transducer is located on fused salt pot sidewall, pump discharge pressure sensor is located on the straight length of pump for liquid salts export pipeline to be tested, temperature transducer is plugged in fused salt tank inner chamber, and speed probe is located on described motor.
Vortex-shedding meter is communicated with by steam bend pipe with the chuck layer of the jacket pipe on expansion joint both sides, to realize the circulation of steam; Jacket pipe is also provided with steam inlet/outlet simultaneously.
Below said structure of the present invention is described as follows:
Power transmission system: for the stable operation of pump for liquid salts provides power.
Whole power transmission system is fixed on fused salt cover plate, and motor is arranged on electric machine support, is connected with transmission shaft by coupling.Motor realizes the adjustment of rotating speed by frequency variator, to carry out the research of pump for liquid salts performance under different rotating speeds.
Liquid-way system: form a fused salt circulation loop, ensure that this device has high measuring accuracy and safe operation.
Fused salt cover plate has slightly large pump for liquid salts and picks and places hole, to change the pump for liquid salts of different model, make a service test to it, applicability is wide;
The pipeline of whole jacket pipe tilts 5 ° and installs, and the joint of jacket pipe and fused salt pot sidewall is the minimum point of whole pipeline, and proof test terminates rear ducted fused salt and can all flow back in fused salt tank;
Flange adopts jacket flange, matches with jacketed pipeline.Steam inlet is established in chuck layer one end of jacket pipe, and the other end establishes steam (vapor) outlet, and steam can circulate in chuck layer, with fully to pipeline companion heat, ensures that line temperature is evenly distributed;
In pipeline, expansion joint is installed, to offset pipeline swelling stress at high temperature, prevents pipeline stress and destroy;
Because the vortex-shedding meter installed in pipeline and expansion joint do not have chuck layer, vortex-shedding meter is communicated with by steam bend pipe with the steam in the chuck layer on expansion joint both sides, to realize the circulation of steam;
Reducer pipe is used for the connection of different size pipeline, and install a straight length between reducer pipe and valve, pump for liquid salts outlet pressure sensor is arranged on this straight length;
Fused salt pot bottom is welded with drain hole, so as to change Long-Time Service go bad after fused salt.
Air-channel system: for fused salt provides shielding gas.
Fused salt cover plate is provided with nitrogen inlet, passes into low-pressure nitrogen to protect fused salt in fused salt tank, nitrogen is provided after reduction valve reduces pressure by nitrogen bottle;
Fused salt cover plate is provided with nitrogen drain, to discharge the steam that high-temperature molten salt produces and the nitrogen protecting fused salt.
Heating system: for heating fused salt.
In the tank body of fused salt tank, insertion heater is installed, directly to fused salt heating, can has the advantages that efficiency is high;
The periphery of fused salt tank is also wound around electrical heating wire, and by heating fused salt tank, heat is passed to fused salt, this structure can heat fused salt on the one hand, can also compensate fused salt outwardly dispersed heat on the one hand;
The combination of above two kinds of mode of heatings, the mode that namely, heating and external heat combine, can accelerate the speed of fused salt fusing, shortens the time that test is used, improves test efficiency.
Heat tracing insulating system: adopt the mode that steam tracing and electrical tracing combine, and adopt aluminum silicate fiber to carry out heat-insulation and heat-preservation, prevent fused salt from solidifying.
Fused salt is solid at normal temperatures, need when device uses first fused salt to be heated to fusing, opening pump for liquid salts again makes fused salt circulate inside pipeline, before opening pump for liquid salts, need to open tracing system preheating is carried out to pipe-line system, otherwise fused salt sharply meets cold easily frozen plug pipeline inside pipeline; Need to change due to during test different model pump for liquid salts to valve this section of pipeline at pump for liquid salts fixed plate, this section of electrically heat tracing mode of pipeline accompanies heat; All the other pipelines adopt the mode of jacket pipe steam tracing to accompany heat, and this companion's hot mode uniformity of temperature profile, use are reliably.
Fused salt tank and pipeline periphery are surrounded by thermal insulation layer, and material is aluminum silicate fiber.
Data acquisition and analysis system: for gathering the signals such as pressure, rotating speed, flow, temperature, electric current, voltage, and analyze the external characteristics that image data obtains pump for liquid salts.
This system take computer unit as core, sensor converts various measured parameter (as: flow, rotating speed etc. of pump inlet and outlet pressure, pump) to analogue signal, undertaken amplifying or decaying by amplifier, and convert digital quantity to through A/D converter, be connected with computer unit by input interface.In process of the test, by computer unit, circling measurment, collection, storage can be carried out to measured parameter through Software for Design, and calculate the pump external characteristicss such as flow, lift, efficiency, air horsepower according to correlation formula.Test result can be provided by peripheral unit (printer, plotter) with the form of data, form, curve or fitting formula.
Fluid path pipeline is provided with vortex-shedding meter, this flowmeter accurately can measure the flow of high-temperature molten salt, for avoiding the measuring accuracy of flow condition interference flow in pipeline, need before and after flowmeter to arrange straight length, straight length before vortex-shedding meter is not less than 10 times of pipe diameters, and straight length is below not less than 5 times of pipe diameters;
Motor is provided with magnetoelectric tachometric transducer, measures the rotating speed of fused salt pump shaft;
The air horsepower electrical measuring method of pump for liquid salts is measured, and motor is connected to voltmeter and galvanometer, with electric current and the voltage of computer recording motor, then obtains loss size by no-load test and Load test, calculates the air horsepower of pump for liquid salts;
On fused salt tank near pump for liquid salts import He on pump for liquid salts export pipeline, pressure transducer is installed, for measuring the pressure that pump is imported and exported;
Can be obtained the external characteristics of pump for liquid salts as calculated by above-mentioned survey data, concrete test method is as follows:
(1) fused salt lift of pump calculates according to the following formula:
In formula:
P
d, p
s---the static pressure of pump for liquid salts outlet, inlet, Pa;
Z
d, z
s---pump for liquid salts outlet, import to the distance of optional measurement datum, m;
V
d, v
s---the speed of pump for liquid salts outlet, inlet's liquid, m/s;
Fused salt density under ρ---corresponding temperature, can find according to fused salt physical property table, kg/m
3;
G---gravity accleration, m/s
2.
The exit static pressure power p of pump for liquid salts in formula (1)
scan by following formulae discovery:
P
s=p '
s+ ρ gh
s(2) in formula:
P '
s---pump inlet pressure transducer institute measuring pressure, Pa;
H
s---the pressure-measuring point of pump inlet pressure transducer and the height difference of pump for liquid salts import, m.
The pressure-measuring point of pump for liquid salts outlet distance pump discharge pressure sensor has a segment distance, should add the on-way resistance Δ p of pipeline when calculating the outlet pressure of pump for liquid salts
f, local resistance Δ p
kthe Pressure Drop ρ gh that loss and height difference cause
d, the outlet pressure p of pump for liquid salts in formula (1)
dfor
In formula:
P '
d---pump discharge pressure sensor institute measuring pressure, Pa;
H
s---the height difference that the pressure-measuring point of pump discharge pressure sensor and pump for liquid salts export, m;
λ---friction factor, can look into Moody chart according to reynolds number Re and draw,
μ---the kinetic viscosity of fused salt under corresponding temperature, can find according to fused salt physical property table, Ns/m
2;
V---velocity of medium, m/s;
L---length of straight pipe, m;
D---bore, m;
K---coefficient of partial resistance, can be checked in by mechanical design handbook.
The middle fused salt of formula (1) pumps, the speed v of inlet liquid
dand v
scan be calculated by following formula
In formula:
Q---flowmeter survey the flow of pump for liquid salts, m
3/ s;
D
d---pump for liquid salts outlet caliber, m;
D
s---pump for liquid salts import caliber, m.
(2) air horsepower of pump for liquid salts and efficiency
The mechanical output that the air horsepower of pump for liquid salts i.e. motor shaft export, as long as the output power therefore measuring motor.The present invention adopts loss analysis method to measure the output power of motor, and loss analysis method is exactly the output power of trying to achieve by the various loss power sum of deduction.When induction-motor load runs, obtain effective input power P from electrical network
0, be consumed in iron loss P first in the stator
fewith stator copper loss P
cu1, remaining electromagnetic power P
dcbe delivered to rotor by rotating magnetic field from stator, then remove rotor copper loss P
cu2with assorted consumption P
safter, just become power of motor.Power of motor removes machinery consumption P
jw, just become effective mechanical output P that motor rotary shaft exports, the determination of above loss can be tested by empty load of motor and Load test is determined.Therefore the air horsepower of pump for liquid salts is (3), carries out pump for liquid salts external characteristics mensuration thus.
P＝P
0-P
Fe-P
Cu1-P
Cu2-P
jw-P
s(3)
The efficiency of pump for liquid salts is the ratio of useful horsepower and air horsepower, namely
The invention has the beneficial effects as follows:
This device be a set of for measuring conveying high-temperature molten salt time pump for liquid salts performance novel device, its concrete effect is as follows:
(1) precision is high.Can take directly fused salt as Medium Measurement fused salt pump performance, avoid and carry out testing the error that conversion obtains the generation of pump for liquid salts performance with water, the test accuracy of device be high.
(2) fused salt rate of melting is fast.The mode energy rapid melting fused salt that interior heating is used together with external heat, and temperature fused salt being heated to test needs, save time, improve the efficiency of test.
(3) safe and reliable to operation.Whole device have employed reliable insulating structure, avoids the loss of fused salt heat, serves the effect preventing from scalding simultaneously; Pipeline have employed reliable tracing system, to prevent in running fused salt at pipe intercrystalline; The pipeline of whole liquid-way system tilts to install, and proof test terminates to remain without fused salt in rear pipeline; Adopt nitrogen as protection gas, prevent fused salt from going bad.
(4) highly versatile.The size of multiple pump for liquid salts is with reference to during apparatus design, fused salt cover plate can install the pump for liquid salts of most of model, pipeline adopts reducer pipe to connect the pump for liquid salts of different model, and the height of fused salt tank also can hold the pump for liquid salts of different model, can make a service test to the pump for liquid salts of most model.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 is general assembly structural representation of the present invention.
Fig. 2 is fused salt cover plate schematic diagram.
Fig. 3 is the worm's eye view of fused salt tank.
In figure: 1. jacket flange, 2. jacket pipe, 3. steam bend pipe, 4. vortex-shedding meter, 5. steam inlet, 6. valve, 7. ribbon heater, 8. pump discharge pressure sensor, 9. reducer pipe, 10. transmission shaft, 11. electric machine supports, 12. motors, 13. speed probes, 14. coupling, 15. pump for liquid salts fixed plates, 16. fused salt cover plates, 17. charging apertures, 18. cover plate insulation bags, 19. fused salt tanks, 20. metallic hoses, 21. reduction valve, 22. nitrogen bottles, 23. insertion heaters, 24. temperature transducers, 25. shells, 26. pump for liquid salts, 27. thermal insulation layers, 28. drain holes, 29. bearings, 30. pump inlet pressure transducers, 31. pump for liquid salts outer pipes, 32. electrical heating wires, 33. steam (vapor) outlets, 34. expansion joints, 35. supports of pipelines, 36. computer units, 37. nitrogen inlets, 38. square pump for liquid salts bolt of fixing plate holes, 39. circular pump for liquid salts bolt of fixing plate holes, 40. drains.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Embodiment one:
In FIG, the inventive system comprises six systems, be respectively power transmission system, liquid-way system, air-channel system, heating system, heat tracing insulating system and data acquisition and analysis system.
Power transmission system of the present invention comprises motor (12), coupling (14), electric machine support (11), transmission shaft (10).Motor (12) is arranged on pump for liquid salts fixed plate (15) by electric machine support (11), and pump for liquid salts fixed plate (15) is bolted on fused salt cover plate (16) top.Motor (12) is connected by coupling (14) with transmission shaft (10), realizes the transmission of power.
In FIG, liquid-way system of the present invention comprises fused salt tank (19), pump for liquid salts (26), pump for liquid salts outer pipe (31), valve (6), expansion joint (34), reducer pipe (9), U-shaped jacket pipe (2).Air-channel system comprises nitrogen bottle (22), reduction valve (21) and metallic hose (20).Jacket pipe (2) and fused salt tank (19) adopt the manufacture of 18Cr-12Ni-2.5Mo stainless steel, and under high temperature, intensity is high, can the corrosion of high temperature resistant molten salt, also can prevent from because of the steam passed into, pipeline being got rusty in jacket pipe (2).Valve (6) is for regulating the flow of pump for liquid salts.Jacket pipe (2) adopts full jacketed form, and this form can be hot to the omnibearing companion of pipeline, to ensure being evenly distributed of line temperature.Jacket pipe (2) is provided with the tilt angle of 5 °, and support with support of pipelines (35), after device is finished using, fused salt can all flow back in fused salt tank (19) like this, prevents fused salt frozen plug in pipeline.The cover plate of fused salt tank (19) has slightly large hole, and the height of tank body is enough, can test the pump for liquid salts of most of model (26).When changing different model pump for liquid salts (26), reducer pipe (9) does corresponding replacing according to line size.
In FIG, heat tracing insulating system of the present invention comprises thermal insulation layer (27), shell (25), cover plate insulation bag (18), jacket pipe (2), steam bend pipe (3) and ribbon heater (7).Fused salt cover plate (16) below is provided with cover plate insulation bag (18), reduces heat and sheds from fused salt cover plate (16).Be filled with the thermal insulation layer (27) that material is aluminum silicate fiber between fused salt tank (19) and shell (25), reduce heat and shed from the side of fused salt tank (19) and bottom.Fused salt walked by the interior pipe of jacket pipe (2), walks steam in chuck, and the heat of steam compensate for the heat that fused salt distributes in environment, thus plays the effect of insulation.The bent tube section of jacket pipe (2) is connected with straight length with jacket flange (1), vortex-shedding meter (4) is connected with steam bend pipe (3) with the chuck layer of the left and right straight length of expansion joint (34), and the steam in chuck is circulated.Steam inlet is established in chuck layer one end of jacket pipe, and the other end establishes steam (vapor) outlet, and steam enters chuck layer from steam inlet (5), has flowed out the transmission of heat from steam (vapor) outlet (33).The outer pump for liquid salts fixed plate (15) of fused salt tank owing to being inconvenient to arrange jacketed type pipeline, adopts wrap style ribbon heater (7) to carry out companion's heat to valve (6) section pipeline.The pipeline of liquid-way system and annex thereof are all equipped with thermal insulation layer (not shown in FIG.) outward, to reduce the loss of heat.
In FIG, heating system of the present invention comprises insertion heater (23) and electrical heating wire (32).Insertion heater (23) is arranged on the middle and lower part of fused salt tank (19), and electrical heating wire (32) is wrapped in the periphery of fused salt tank (19), heats up rapidly, homogeneous heating.
In FIG, data acquisition and analysis system comprises vortex-shedding meter (4), pump inlet pressure transducer (30), pump discharge pressure sensor (8), temperature transducer (24), speed probe (13) and computer unit (36).Vortex-shedding meter (4) is located on the pipeline of liquid-way system, pump inlet pressure transducer (30) is located on fused salt pot sidewall, pump discharge pressure sensor (8) is located on the straight length of pump for liquid salts export pipeline to be tested, and temperature transducer (24) is plugged in fused salt tank inner chamber.Pump inlet pressure transducer (30) can not only measure the inlet pressure of pump for liquid salts (26), by the liquid level that can also obtain fused salt that converts.Speed probe (13) is arranged on motor (12), and this sensor is noncontacting proximity sensor, can be convenient for measuring pump for liquid salts rotating speed.The flow of pump for liquid salts is measured by vortex-shedding meter (4).The air horsepower of pump for liquid salts is calculated by the voltage and current value recorded.By all measuring the Signal transmissions that obtains to computer unit (36), according to the definition of pump efficiency, calculated the efficiency of pump by measured above-mentioned data.
In fig. 1 and 2, fused salt cover plate (16) has charging aperture (17) to add solid salt.If there is air can aggravate fused salt decomposition at high temperature in tank; so fused salt tank (19) must use nitrogen protection; in fused salt cover plate (16) top, nitrogen inlet (37) is housed; nitrogen is provided by nitrogen bottle (22), enters fused salt tank (19) through reduction valve (21) and metallic hose (20).Fused salt cover plate (16) has the steam that drain (40) produces with air in drain tank and fused salt, avoid tank internal air pressure too high.Fused salt cover plate (16) is offered the bolt hole of diverse location to install the pump for liquid salts (26) of different model, be arranged on circular pump for liquid salts bolt of fixing plate hole (39) if produce circular pump for liquid salts fixed plate (15); If square pump for liquid salts fixed plate (15), then be arranged on square pump for liquid salts bolt of fixing plate hole (38), no bolt hole plug is blocked, and enters fused salt tank (19) aggravation fused salt go bad to prevent air and foreign material.
In figure 3, the bearing (29) of fused salt tank (19) bottom is uniformly distributed in 120 °, and bearing (29) is welded on effect fused salt tank (19) playing support.The minimum point of fused salt tank (19) is provided with drain hole (28), when service time, long component changed fused salt, changes fused salt in tank.
Embodiment two:
The key step of pump for liquid salts performance test is:
1) remove the foreign material in fused salt tank (19), especially can not leave organic substance, fire good, fused salt three components is strong oxidizer, oxygen and heat are released in easy decomposition, itself is also non-combustible, but can cause combustible combustion, to friction and temperature vibration more responsive.
2) motor (12) and pump shaft are connected, remove pump for liquid salts (26) impeller, regulate frequency variator that motor (12) is adjusted to test speed, the unloaded moment of torsion of record pump.
3) whole power transmission system is installed on fused salt cover plate (16).
4) check whether each instrument and equipment normally works.
5) in fused salt tank (19), fused salt powder is added.
6) open steam tracing loop and ribbon heater (7) of jacket pipe (2), preheating pipe, temperature is arranged on 180 DEG C.
7) in fused salt tank (19), pass into low-pressure nitrogen, flow is 20ml/min, discharges air, waits for that air is clapped clean, nitrogen flow is controlled at 60ml/min.Should note during device experiment ventilating, avoid indoor nitrogen gas concn too high.
8) open the heating system of fused salt tank (19), temperature is arranged on 180 DEG C, and warming velocity controls the soonest at 10 DEG C/min.
9) when temperature all reaches about 180 DEG C in jacket pipe (2) temperature and fused salt tank (19), start pump for liquid salts (26), slowly open valve (6), until standard-sized sheet.Arranging fused salt tank (19) heating-up temperature is test temperature, and pipeline tracing system temperature is transferred to the temperature being not less than fused salt tank and arranging, and heats fused salt further.Warming velocity controls equally the soonest at 10 DEG C/min.
10) when temperature of molten salt reaches the temperature of test requirements document, regulate motor inverter, pump for liquid salts (26) rotating speed is transferred to test speed.
11) pump for liquid salts (26) stable after, voltage, electric current, flow, pump inlet and outlet pressure, rotating speed are gathered.
12) slowly close minor valve (6), flow system flow is reduced, makes invariablenes turning speed simultaneously, again voltage, electric current, flow, pump inlet and outlet pressure are gathered after stable.
13) repeat step 12, survey the data of 13 operating modes.
14), after data acquisition, motor (12) stop button is pressed.
15) valve (6) is opened to maximum position, makes fused salt all flow back to fused salt tank (19).
16) observe liquid level, guarantee that fused salt all flows back to fused salt tank (19), close each heating system.
17) power switch of each instrument is closed.
18) measured data are processed, generate H-Q, N-Q, η-Q performance chart.
Claims (7)
1. a high-temperature melting salt pump external characteristics testing apparatus, is characterized in that: this device comprises power transmission system, liquid-way system, air-channel system, heating system, heat tracing insulating system and data acquisition and analysis system;
Described liquid-way system mainly comprises jacket pipe and fused salt tank, and fused salt tank top is provided with fused salt cover plate, and fused salt pot bottom is provided with drain hole; Fused salt cover plate is also provided with charging aperture, nitrogen inlet, drain, and dissolved salt pump to be tested picks and places hole; Described jacket pipe one end is connected with pump discharge pipe through valve, and the other end inserts fused salt pot sidewall and is communicated with fused salt tank inside, and described pump discharge pipe to be inserted in fused salt tank by fused salt cover plate and to connect pump for liquid salts to be tested outlet;
Described air-channel system comprises nitrogen bottle, reduction valve and flexible pipe, and flexible pipe to be inserted on fused salt cover plate and to be communicated with fused salt tank inside;
Power transmission system mainly comprises motor and transmission shaft, and transmission shaft is inserted in fused salt tank via fused salt tank cover plate for sealing and is connected with pump for liquid salts to be tested, and whole power transmission system is fixed on fused salt cover plate by pump for liquid salts fixed plate;
Described heat tracing insulating system comprises pump for liquid salts fixed plate to the electrical tracing structure on valve section pipeline, and is located at the steam tracing structure of chuck pipeline section, and the thermal insulation layer of fused salt tank surrounding, cover plate insulation bag, the thermal insulation layer of pipeline periphery in liquid-way system.
2. high-temperature melting salt pump external characteristics testing apparatus according to claim 1, it is characterized in that: described heating system comprises insertion heater and is wrapped in the electrical heating wire of fused salt tank periphery wall, electrical heating wire and insertion heater respectively via controller are connected with data acquisition and analysis system.
3. high-temperature melting salt pump external characteristics testing apparatus according to claim 1 and 2, is characterized in that: the pipeline of jacket pipe is U-shaped, and U-tube road tilts 5 °-10 ° installations, and the joint of jacket pipe and fused salt pot sidewall is the minimum point of whole pipeline.
4. high-temperature melting salt pump external characteristics testing apparatus according to claim 3, is characterized in that: be also provided with jacket flange and expansion joint in the pipeline of jacket pipe, jacket flange matches with jacket pipe.
5. high-temperature melting salt pump external characteristics testing apparatus according to claim 4, is characterized in that: be provided with reducer pipe between pump for liquid salts outer pipe and valve, also installs a straight length between reducer pipe and valve.
6. high-temperature melting salt pump external characteristics testing apparatus according to claim 5, it is characterized in that: described data acquisition and analysis system comprises computer unit and the vortex-shedding meter be connected with computer unit respectively, pump inlet pressure transducer, pump discharge pressure sensor, temperature transducer, speed probe, vortex-shedding meter is located on the pipeline of jacket pipe, pump inlet pressure transducer is located on fused salt pot sidewall, pump discharge pressure sensor is located on the straight length of pump for liquid salts export pipeline to be tested, temperature transducer is plugged in fused salt tank inner chamber, speed probe is located on described motor.
7. high-temperature melting salt pump external characteristics testing apparatus according to claim 6, is characterized in that: vortex-shedding meter is communicated with by steam bend pipe with the chuck layer of the jacket pipe on expansion joint both sides.
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| CN105909537A (en) * | 2016-05-13 | 2016-08-31 | 南京工业大学 | Normal-temperature modeling test method for high-temperature molten salt pump |
| CN106705726A (en) * | 2016-11-23 | 2017-05-24 | 中国科学院电工研究所 | Fused salt storage tank for experiment |
| CN107131119A (en) * | 2017-04-01 | 2017-09-05 | 江苏大学 | High-temperature melting salt pump compbined test detection means under a kind of long-shaft liquid |
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| CN108302026A (en) * | 2018-01-30 | 2018-07-20 | 常州索拉尔熔盐泵阀科技有限公司 | A kind of high-temperature long-shaft pump for liquid salts performance detection testing bench |
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| CN108302026A (en) * | 2018-01-30 | 2018-07-20 | 常州索拉尔熔盐泵阀科技有限公司 | A kind of high-temperature long-shaft pump for liquid salts performance detection testing bench |
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