CN108344849B - Long-distance water intaking dynamic test system - Google Patents
Long-distance water intaking dynamic test system Download PDFInfo
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- CN108344849B CN108344849B CN201810137739.5A CN201810137739A CN108344849B CN 108344849 B CN108344849 B CN 108344849B CN 201810137739 A CN201810137739 A CN 201810137739A CN 108344849 B CN108344849 B CN 108344849B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a long-distance water taking dynamic test system which comprises a test device, a liquid adding device, a detection system and a supporting structure, wherein the test device comprises a water inlet, a water outlet and a plurality of test tubes, the test tubes are connected in series, the inlet of the first test tube is connected with the water inlet through a liquid pipeline, and the outlet of the last test tube is connected with the water outlet through a liquid pipeline; the liquid adding device is arranged on the liquid pipeline and used for adding test liquid to the test device, and the detection system is used for detecting the liquid in the test device; the supporting structure is arranged below the testing device and used for supporting the testing device. The test tubes can be arranged in a plurality of numbers, so that different growth stages of fouling organisms can be simulated; the liquid adding device is used for adding the test liquid into the test system at regular time and quantity, so that the density of the living things in the sea area of the water source is simulated, the test environment suitable for growth and propagation of the fouling organisms is created, and the fouling change mechanism of the fouling organisms in the long-distance water taking system can be better researched.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a long-distance water intaking dynamic test system.
Background
Water intake is the beginning of water utilization engineering. Under the influence of aquatic ecological environment, the adhesion growth of fouling organisms in a water taking system is one of the key problems to be solved in the water taking process. At present, the water taking project is mainly focused on a cooling water treatment system of a power plant, the water taking project is generally arranged in a near-shore area, the water delivery distance is short, and the research on the potential damage of fouling organisms in the long-distance water taking project is still few. The problems of liquid pipeline narrowing (even blockage), water intake reduction, engineering outage and the like caused by attachment of fouling organisms in the process of seawater desalination long-distance water intake are solved, and the method is an effective means for further expanding the application radiation surface of the water utilization technology.
The prior patent literature discloses a test device for simulating long-distance water delivery, which focuses on water quality change research (such as application publication No. CN102392430A) and water flow simulation (application publication No. CN105092808A), and application publication No. CN 106706851A proposes to detect the biological growth and reproduction in a long-distance water delivery liquid pipeline, but does not relate to a specific detection method and how to simulate the biological growth in an actual ecological environment.
Therefore, it is an urgent need to solve the above-mentioned technical problems by providing a dynamic testing system for long-distance water intake to overcome the above-mentioned disadvantages of the prior art.
Disclosure of Invention
The invention aims to provide a long-distance water taking dynamic test system, which aims to solve the problems in the prior art, create a test environment suitable for growth and propagation of fouling organisms and research a fouling change mechanism of the fouling organisms in the long-distance water taking system.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a long-distance water taking dynamic test system which comprises a test device, a liquid adding device, a detection system and a support structure, wherein the test device comprises a water inlet, a water outlet and a plurality of test tubes, the test tubes are connected in series, the inlet of the first test tube is connected with the water inlet through a liquid pipeline, and the outlet of the last test tube is connected with the water outlet through a liquid pipeline; the liquid adding device is arranged on the liquid pipeline and used for adding test liquid to the test device, and the detection system is used for detecting the liquid in the test device; the supporting structure is arranged below the testing device and used for supporting the testing device.
Preferably, the test device further comprises a water storage tank, an inlet of the water storage tank is connected with the water inlet, an outlet of the water storage tank is connected with a circulating water pump, and one side of the circulating water pump, which is far away from the water storage tank, is connected with an inlet of the test pipe; the circulating water pump is a variable-frequency circulating water pump.
Preferably, the water outlet is connected with the inlet of the water storage tank through a liquid pipeline to form a circulating system.
Preferably, the detecting system comprises a water quality monitoring probe, a thermometer, a flowmeter and a sampling valve, wherein the water quality monitoring probe is arranged in the water storage tank, and the thermometer, the flowmeter and the sampling valve are uniformly distributed on the liquid pipeline.
Preferably, the system also comprises a temperature control system, wherein the temperature control system comprises a heat exchanger and a circulating cooler, the heat exchanger is arranged in the water storage tank, the circulating cooler is arranged outside the water storage tank, and the circulating cooler is connected with the heat exchanger.
Preferably, the test tube is provided with two, including the first test tube and the second test tube that connect gradually, the import of first test tube with circulating water pump connects, the export of second test tube with the delivery port is connected.
Preferably, the diameter of the first test tube is larger than that of the liquid pipeline, a biological fouling test plate is arranged in the first test tube, and a mesh screen for intercepting large fouling organisms is arranged at the inlet and the outlet of the first test tube; the diameter of the second test tube is the same as that of the liquid pipeline, and the second test tube is used for observing the adherent growth condition of the deposition of the micro fouling organisms.
Preferably, the liquid adding device comprises a liquid adding valve, a peristaltic pump and a liquid storage bottle, the liquid adding valve is arranged on the liquid pipeline, and the liquid adding valve is also connected with the liquid storage bottle through the peristaltic pump; the liquid storage bottle is used for storing the test liquid.
Preferably, the test liquid is a biofouling organism suspension or a biological treatment liquid.
Preferably, the liquid feeding valve comprises a liquid inlet pipe, a liquid inlet valve and a liquid outlet bent pipe, one end of the liquid inlet pipe is connected with the peristaltic pump, the other end of the liquid inlet pipe is connected with the liquid outlet bent pipe through the liquid inlet valve, the liquid outlet bent pipe extends into the liquid pipeline, and the bending direction of the liquid outlet bent pipe is consistent with the liquid flow direction.
Compared with the prior art, the invention has the following technical effects:
1. a plurality of test tubes can be arranged to simulate different growth stages of fouling organisms;
2. the test liquid is added into the test system at regular time and quantity through the liquid adding device, the density of the living things in the sea area of the water source is simulated, and a test environment suitable for the growth and the propagation of fouling organisms is created;
3. the temperature of the water body in the test system is adjusted through the temperature control system, seasonal changes of the water environment are simulated, and simulation of the ecological environment is further improved;
4. the liquid adding device can carry out different experimental researches on fouling organisms by adding different experimental liquids, and has wide application range;
5. the whole long-distance water taking dynamic test system is high in integration degree, simple in structure and easy to operate, and reduces the water consumption and the test cost for the test.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a long-distance water intake dynamic test system according to the present invention;
FIG. 2 is a schematic view of a temperature measuring port according to the present invention;
fig. 3 is a schematic structural view of a charging valve of the present invention;
wherein, 1, water storage tank, 2, valve, 3, circulating water pump, 4, liquid adding valve, 5, sampling valve; 6. the device comprises a liquid pipeline, 7, a temperature measuring port, 8, a flowmeter, 9, a first test pipe, 10, a partition board, 11, a second test pipe, 12, a bypass pipeline, 13, a water outlet, 14, a water inlet, 15, a heat exchanger, 16, a thermodetector, 17, a thermometer, 18, a liquid inlet pipe, 19, a liquid inlet valve, 20 and a liquid outlet bent pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a long-distance water taking dynamic test system, which aims to solve the problems in the prior art, create a test environment suitable for growth and propagation of fouling organisms and research a fouling change mechanism of the fouling organisms in the long-distance water taking system.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-3, the invention provides a dynamic test system for long-distance water taking, which comprises a test device, a liquid adding device, a detection system and a support structure, wherein the test device comprises a water inlet 14, a water outlet 13 and a plurality of test tubes, the test tubes are connected in series, the inlet of the first test tube is connected with the water inlet 14 through a liquid pipeline 6, and the outlet of the last test tube is connected with the water outlet 13 through the liquid pipeline 6; the liquid adding device is arranged on the liquid pipeline 6 and is used for adding test liquid to the test device, and the detection system is used for detecting the liquid in the test device; the supporting structure is arranged below the testing device and used for supporting the testing device.
The test device also comprises a water storage tank 1, wherein an inlet of the water storage tank 1 is connected with a water inlet 14, natural seawater in a water source area enters the water storage tank 1 from the water inlet 14 for temporary storage, and a valve 2 is arranged at the water inlet 14 and used for controlling the opening and closing of the water inlet 14. The outlet of the water storage tank 1 is connected with a circulating water pump 3, one side of the circulating water pump 3, which is far away from the water storage tank 1, is connected with the inlet of the first test pipe, and power is provided for the flow of the test seawater through the circulating water pump 3; the circulating water pump 3 is a variable-frequency circulating water pump 3, so that the phenomenon that the temperature of flowing water in a pipeline is continuously increased due to the running of the circulating water pump 3 is avoided; the inlet and outlet of the frequency conversion type circulating water pump 3 are both provided with valves 2 for controlling the flow of liquid.
The water storage tank 1 is made of a transparent acrylic plate with the wall thickness of 10mm, the specification is 50mm multiplied by 70mm, an inlet and an outlet are arranged on the side wall, the outlet is arranged at the position close to the bottom of one side and connected with the circulating water pump 3 through a liquid pipeline 6, the inlet is arranged at the upper part of the opposite side and connected with a water inlet 14 through the liquid pipeline 6; frequency conversion type circulating water pump 3 flow 5m3The head is 15m, the rotating speed is 2900r/min, and the liquid pipeline 6 adopts a PVC pipe with the diameter of 40 mm. The water outlet 13 of the test system can be connected with the inlet of the water storage tank 1 through the liquid pipeline 6 to form a circulating system, and the circulating system runs in a circulating mode through the water storage of the water tank and the circulating water pump 3; the water inlet 14 and the water outlet 13 can be controlled to feed water through the water inlet 14 and discharge water through the valve 2 arranged on the water outlet 13, and the once straight-flow operation is carried out.
The long-distance water taking dynamic test system also comprises a temperature control system, wherein the temperature control system comprises a heat exchanger 15 and a circulating cooler, the heat exchanger 15 is arranged in the water storage tank 1, the heat exchanger 15 is a stainless steel coil type heat exchanger with the height of about 370mm and is made of 316L stainless steel pipes, the diameter of the stainless steel pipes is 9.53mm, and the wall thickness is 0.5 mm; the circulating cooler is arranged outside the water storage tank and is connected with the heat exchanger 15 through a hose, and the water-ethylene glycol 1:1 mixed liquid is used as a cooling medium. The circulating cooler is composed of a bath, a compressor, a circulating pump and a temperature control system, the temperature range is-20-40 ℃, the flow rate is 10-15L/min, a cooling medium flows between the bath and a heat exchanger of the circulating cooler through the circulating pump arranged in the circulating cooler to take away heat of test liquid, and the volume of the cooling medium is 3-10L. Regulating the temperature of the water body in the test system through a temperature control system to simulate the seasonal change of the water environment; wherein, the water storage tank 1 is also provided with a temperature measuring instrument 16 and a cleaning test board for measuring the temperature and the cleanliness of the water body in the water storage tank 1.
The device comprises two test tubes, wherein the two test tubes comprise a first test tube 9 and a second test tube 11 which are sequentially connected in series, an inlet of the first test tube 9 is connected with the circulating water pump 3, an outlet of the first test tube is connected with an inlet of the second test tube 11, and an outlet of the second test tube 11 is connected with a water outlet 13.
The diameter of the first test tube 9 is larger than that of the liquid pipeline 6, a partition plate 10 is arranged in the first test tube 9, the thickness of the partition plate 10 is 10mm, a biological fouling test plate with fouling organisms attached in advance is mounted on the partition plate 10, and the large fouling organism adult stage can be simulated; the import and the exit of first test tube 9 all are provided with the mesh screen, and 25 meshes ~ 100 meshes of mesh screen specification, the optional stainless steel of material or nylon to the flange is fixed in first test tube 9 both ends, can effectively hold back large-scale stained living beings. The diameter of the second test tube 11 is the same as that of the liquid pipeline 6, so that the adherent growth condition of the deposition of the micro fouling organisms can be observed. Through the combination of the first test tube 9 and the second test tube 11, different growth stages of fouling organisms can be simulated, and the accuracy of the experiment is improved; and the two test tubes are made of transparent acrylic plates with the thickness of 3-20 mm, so that the whole strength is ensured, and the fouling organisms can be conveniently observed. The first test tube 9 is made of an acrylic plate with the thickness of 10mm, and the diameter is 80 mm; the second test tube 11 was made of acrylic sheet with a thickness of 8mm, phi 40 mm. The two ends of the first test tube 9 and the second test tube 11 are both provided with valves 2 for controlling the circulation of liquid.
The liquid adding device comprises a liquid adding valve 4, a peristaltic pump and a liquid storage bottle, the liquid adding valve 4 is arranged on the liquid pipeline 6, and the liquid adding valve 4 is also connected with the liquid storage bottle through the peristaltic pump; the liquid storage bottle is used for storing test liquid. The test liquid is a pre-prepared suspension liquid containing a certain amount of micro fouling organisms or large fouling organisms growing in a planktonic period, the test liquid in the liquid storage bottle is added into a test system at regular time and quantity through a peristaltic pump, the density of the organisms in the water source region and the sea area is simulated, and a test environment suitable for the growth and the propagation of the fouling organisms is created. The liquid feeding valve 4 comprises a liquid inlet pipe 18, a liquid inlet valve 19, a valve 2 and a liquid outlet bent pipe 20, one end of the liquid inlet pipe 18 is connected with the peristaltic pump, the other end of the liquid inlet pipe is connected with the liquid outlet bent pipe 20 through the liquid inlet valve 19 and the valve 2, the liquid outlet bent pipe 20 extends into the liquid pipeline 6, the bending direction of the liquid outlet bent pipe 20 is consistent with the liquid flow direction, and test liquid can be conveniently added into the liquid pipeline 6 of the system. Wherein the liquid adding device is provided with a plurality of liquid adding devices at different positions of the liquid pipeline 6, so that test liquid can be added at different positions conveniently.
The detection system comprises a water quality monitoring probe, a thermometer 17, a flowmeter 8, a sampling valve 5 and the like, wherein the water quality monitoring probe is arranged in the water storage tank 1, and the thermometer 17, the flowmeter 8 and the sampling valve 5 are uniformly distributed on the liquid pipeline 6. The water quality monitoring probe is provided with various sensors, including a pH electrode, a conductivity (salinity) electrode, a temperature probe, a dissolved oxygen probe, a turbidity probe, a chlorophyll a/blue-green algae probe and the like, and can effectively monitor the water quality. The real-time detection of water flow, water temperature and water quality in the test system is realized through the thermometer 17 and the flowmeter 8; the sampling valves 5 are arranged on different positions of the liquid pipeline 6, and can sample different positions of the test system, so that the fouling organisms at different positions can be detected, and the conditions of real-time regulation and control and repeated test can be conveniently realized. The thermometer 17 is a glass thermometer and is inserted into a temperature measuring port 7 arranged on the liquid pipeline 6 through a quick connector, and the thermometer 17 is also arranged at the first test tube 9; the flowmeter 8 is an ultrasonic flowmeter.
The support structure comprises a stainless steel support and a PVC (polyvinyl chloride) plank, the stainless steel support is arranged below the PVC plank to support the PVC plank, and the test system is laid on the PVC plank; the stainless steel bracket is made of a square 304 stainless steel pipe, the specification of the stainless steel pipe is 380mm multiplied by 380mm, and the wall thickness is 1 mm; the PVC floor board has the thickness of 6 mm.
The test process of the long-distance water intaking dynamic test system is as follows:
adding natural seawater of a water source place into the water storage tank 1, simulating the biological density of the water source place in the sea area, adding a certain amount of suspended fouling organism larvae, bacteria and algae cultured in a laboratory into the seawater through a liquid adding device, and hanging a cleaning test plate at the position of the water storage tank 1. A test plate with fouling organisms attached in advance is installed in the first test pipe 9, the temperature in different seasons is simulated through a temperature control system according to the test parameters in the table 1, the water flow speed and the time interval mode in the test pipe are adjusted through the circulating water pump 3 according to the operation modes # 1 and #2 and the standby mode, a marine organism fouling dynamic simulation test is carried out, and the growth state of the fouling organisms in the long-distance water taking pipeline is investigated.
In the test process, the water flow, the water temperature and the water quality can be monitored in situ in real time through online detection equipment such as a thermometer 17, a flowmeter 8 and the like; the suspended biomass in the test system can be detected in real time through the sampling valve 5, so that the test conditions can be regulated and controlled in real time and repeated, and fouling organism growth data can be obtained.
After the test water in the test system is discharged after the test is finished, the second test tube 11 can be detached, the test plate hung in the water tank and the first test tube 9 can be taken out, the surface conditions of the tube wall of the test tube and the surface conditions of the test plate are observed, and the type, the quantity, the coverage degree and the thickness of fouling organisms attached to the tube wall are sampled, analyzed and identified simultaneously, so that the growth trend of the fouling organisms in the water taking pipeline is determined. Table 2 shows the items to be tested and the testing frequency during the dynamic simulation test.
In addition, when a liquid storage bottle in the liquid adding device stores biological treatment liquid medicine, such as a certain biocide, the biological treatment liquid medicine can be used for researching a biological fouling chemical control technology of a long-distance water taking pipeline by observing the influence of the biocide on fouling organisms in a test system. A bypass pipeline 12 is also connected in parallel at one side of the liquid pipeline 6 where the first test pipe 9 and the second test pipe 11 are positioned, and valves 2 are arranged at two ends of the bypass pipeline 12 to control the opening and closing of the bypass; when the device is used for researching the chemical prevention and control technology of the biological fouling, the bypass pipeline 12 is controlled to be opened through the valve 2, and the device can be used for researching the concentration change of the biological treatment liquid as a contrast.
TABLE 1 dynamic simulation test system Process
Note: the test water temperature, salinity and dissolved oxygen were set at monthly average water temperature, salinity and dissolved oxygen of 2 months, 5 months, 8 months and 11 months, respectively, according to seasonal characteristics of the water source site.
TABLE 2 test items and test frequency
| Serial number | Item | Analytical method | Reference | Detecting frequency | |
| 1 | pH | Potentiometric method | GB17378.4—2007 | 1 time per |
|
| 2 | Temperature of water | Method of thermometer | GB17378.4—2007 | 1 time per |
|
| 3 | Salinity | Method of salinity meter | GB17378.4—2007 | 1 time per |
|
| 4 | Dissolved oxygen | Iodometric titration | GB17378.4—2007 | 1 time per |
|
| 5 | Residual chlorine | DPD spectrophotometry | GB/T5750—2006 | When adding |
|
| 6 | Larva of a living creature | Microscopic observation method | GB/T12763.6-2007 | 1 time per |
|
| 7 | Adult | Observation method | GB/T12763.6-2007 | / | |
| 8 | Bacteria | Plate counting method | GB17378.7—2007 | 1 time per |
|
| 9 | Chlorophyll (algae) | Fluorescence spectrophotometry | GB17378.7—2007 | 1 time per day |
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The utility model provides a long distance water intaking dynamic test system which characterized in that: the device comprises a test device, a liquid adding device, a detection system and a supporting structure, wherein the test device comprises a water inlet, a water outlet and a plurality of test tubes, the test tubes are connected in series, the inlet of the first test tube is connected with the water inlet through a liquid pipeline, and the outlet of the last test tube is connected with the water outlet through a liquid pipeline; the liquid adding device is arranged on the liquid pipeline and is used for adding test liquid to the test device, the test liquid is fouling organism suspension liquid, and the fouling organism suspension liquid contains micro fouling organisms or large fouling organisms growing in a planktonic period;
the liquid adding device comprises a liquid adding valve, a peristaltic pump and a liquid storage bottle, the liquid adding valve is arranged on the liquid pipeline and is also connected with the liquid storage bottle through the peristaltic pump, and the liquid storage bottle is used for storing the test liquid; the liquid feeding valve comprises a liquid inlet pipe, a liquid inlet valve and a liquid outlet bent pipe, one end of the liquid inlet pipe is connected with the peristaltic pump, the other end of the liquid inlet pipe is connected with the liquid outlet bent pipe through the liquid inlet valve, the liquid outlet bent pipe extends into the liquid pipeline, and the bending direction of the liquid outlet bent pipe is consistent with the liquid flow direction;
the detection system is used for detecting liquid in the test device; the supporting structure is arranged below the testing device and used for supporting the testing device;
the device comprises a liquid pipeline, two test pipes and a control device, wherein the two test pipes comprise a first test pipe and a second test pipe which are sequentially connected, the diameter of the first test pipe is larger than that of the liquid pipeline, a biological fouling test plate is arranged in the first test pipe, fouling organisms are attached to the biological fouling test plate in advance and used for simulating a large fouling organism adult stage, and mesh screens used for intercepting the large fouling organism adult are arranged at an inlet and an outlet of the first test pipe; the diameter of the second test tube is the same as that of the liquid pipeline, and the second test tube is used for observing the adherent growth condition of the deposition of the micro fouling organisms.
2. The long distance water intaking dynamic test system according to claim 1, wherein: the test device also comprises a water storage tank, an inlet of the water storage tank is connected with the water inlet, an outlet of the water storage tank is connected with a circulating water pump, and one side of the circulating water pump, which is far away from the water storage tank, is connected with an inlet of the test tube; the circulating water pump is a variable-frequency circulating water pump.
3. The long distance water intaking dynamic test system according to claim 2, wherein: the water outlet is connected with the inlet of the water storage tank through a liquid pipeline to form a circulating system.
4. The long distance water intaking dynamic test system according to claim 2, wherein: the detection system comprises a water quality monitoring probe, a thermometer, a flowmeter and a sampling valve, wherein the water quality monitoring probe is arranged in the water storage tank, and the thermometer, the flowmeter and the sampling valve are uniformly distributed on the liquid pipeline.
5. The long distance water intaking dynamic test system according to claim 4, wherein: the water storage tank is characterized by further comprising a temperature control system, wherein the temperature control system comprises a heat exchanger and a circulating cooler, the heat exchanger is arranged in the water storage tank, the circulating cooler is arranged outside the water storage tank, and the circulating cooler is connected with the heat exchanger.
6. The long distance water intake dynamic test system according to claim 2 or 5, wherein: the inlet of the first test pipe is connected with the circulating water pump, and the outlet of the second test pipe is connected with the water outlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201828506U (en) * | 2010-07-12 | 2011-05-11 | 大连海洋大学 | Seawater circulating system for testing property of ocean anti-fouling coating |
| CN102023130B (en) * | 2010-10-23 | 2012-06-27 | 中国船舶重工集团公司第七二五研究所 | Flow channel type marine organism adhesion testing device |
| CN202351229U (en) * | 2011-11-29 | 2012-07-25 | 浙江省海洋开发研究院 | Device for simulating influence of dynamic seawater on antifouling coating performance |
| CN204154721U (en) * | 2014-10-31 | 2015-02-11 | 中国海洋石油总公司 | A kind of marine growth biocide device for evaluating performance |
| CN106706851B (en) * | 2016-12-20 | 2019-01-29 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of gravity stream Long-distance Pipeline for Water Conveyance simulator and analogy method |
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