CN113321258A - Large-tonnage is quick degassing system of nuclear with water seeding in circulation - Google Patents
Large-tonnage is quick degassing system of nuclear with water seeding in circulation Download PDFInfo
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- CN113321258A CN113321258A CN202110618301.0A CN202110618301A CN113321258A CN 113321258 A CN113321258 A CN 113321258A CN 202110618301 A CN202110618301 A CN 202110618301A CN 113321258 A CN113321258 A CN 113321258A
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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Abstract
The utility model provides a quick gas removal system of large-tonnage circulation water seeding nuclear, includes circulating water tank, and circulating water tank's below sets up in the position on ground, and the top setting is at the floor position, installs quick gas removal system in circulating water tank between ground and floor, and quick gas removal system's structure is: the device comprises a water intake, a first stainless steel electric ball valve, a water feeding pump, a stainless steel silencing check valve and a sewage draining outlet are sequentially connected in series through a first pipeline, a first branch pipe and a second branch pipe are branched between the stainless steel silencing check valve and the sewage draining outlet, the second branch pipe is connected with a gas nucleus generating tank, the gas nucleus generating tank is connected with an air compressor through an air pipe, and the first branch pipe is communicated with a second pipeline; still including being located the nuclear department of sowing of circulating water inslot, it and gas nuclear formation jar between have the electronic ball valve of second stainless steel, blender, the electronic ball valve of third stainless steel through the second pipeline series connection in proper order, No. one the bleeder is connected between blender and the electronic ball valve of third stainless steel, reliable operation.
Description
Technical Field
The invention relates to the technical field of degassing equipment, in particular to a large-tonnage water-seeding nuclear rapid degassing system for circulation.
Background
When the ship fast navigates in the ocean, the propeller rotates at a high speed, the surface of the blades generates pressure difference to generate force to drive the ship to advance, when the pressure of the suction surface of the blades reaches the saturated vapor pressure, water is gasified to generate cavitation, great noise is released, and when the cavitation is unstable, the surface of the blades can be corroded, and the problem that the bottom of the ship above the propeller generates vibration and exceeds the standard is induced.
Therefore, in the engineering field, a large circulating water tank laboratory is built to research the cavitation and noise of the ship propeller. When the ship propeller is used for model test, the water for the test has higher requirements, namely the water body of the water for the model test is clean, and the air content in the water body needs to meet a certain range except that the chroma and the turbidity meet corresponding requirements. Therefore, the test water is often subjected to degassing and filtering operations.
In the past, when the circulating water is degassed, the circulating water is mainly sprayed to degas, namely, the circulating water is sprayed and dispersed in a plurality of low-pressure degassing tanks (the tanks contain a large number of plastic ball cores, and the contact area between sprayed water drops and vacuum is increased), the upper part in each tank is always kept to be air, the lower part is water, a vacuum extraction opening is arranged at the top of each tank, namely, the water is continuously sprayed and dispersed, and the low-pressure air is always extracted, so that the degassing tanks required by the method are large in size, and the degassing efficiency is low.
When the amount of the recycled water is huge, such as thousands of tons and tens of thousands of tons, the traditional spraying degassing method needs a large number of large degassing towers, and the purpose of low gas content of the test water is difficult to achieve in a short time (3-5 hours).
Disclosure of Invention
The applicant provides a large-tonnage rapid degassing system for a water seeding nucleus for circulation, aiming at the defects in the prior art, so that a high-pressure nucleus seeding mode is adopted, core equipment such as a high-pressure tank, a double-layer nucleus seeding spray pipe and the like are only needed to be generated by a gas nucleus with a small volume, a large amount of micro-bubble gas nuclei are seeded and injected into the original water body, and the gas nuclei are fully contacted with the water body with high gas content and subjected to mass exchange, so that gas is rapidly separated out, and the purpose of rapid degassing is achieved.
The technical scheme adopted by the invention is as follows:
the utility model provides a quick gas removal system of large-tonnage circulation water seeding nuclear, includes circulating water tank, and circulating water tank's below sets up in the position on ground, and the top setting is in the floor position, installs quick gas removal system in circulating water tank between ground and floor, and quick gas removal system's structure is: the device comprises a water intake, wherein the water intake is sequentially connected with a first stainless steel electric ball valve, a water feeding pump, a stainless steel silencing check valve and a sewage draining outlet in series through a first pipeline, a first branch pipe and a second branch pipe are branched between the stainless steel silencing check valve and the sewage draining outlet, the second branch pipe is connected with a gas nucleus generating tank, the gas nucleus generating tank is connected with an air compressor through an air pipe, and the first branch pipe is communicated with a second pipeline; the nuclear reactor is characterized by further comprising a nuclear sowing position located in the circulating water tank, a second stainless steel electric ball valve, a mixer and a third stainless steel electric ball valve are sequentially connected in series between the nuclear sowing position and the gas nuclear generating tank through a second pipeline, and a first branch pipe is connected between the mixer and the third stainless steel electric ball valve.
The further technical scheme is as follows:
the mounting structure at the seeding core position is as follows: including the double-deck porous nuclear spray tube of broadcasting, the double-deck porous nuclear spray tube of broadcasting is installed in circulating water tank, and the double-deck porous nuclear spray tube of broadcasting is including fixing the outer tube in cell body limit wall one end, it has a plurality of outer holes to open on the pipe wall of outer tube, the inside cooperation of outer tube has inserted the inner tube, it has a plurality of holes to open on the pipe wall of inner tube, the other end of cell body limit wall is provided with airtight cavity, the double-deck porous nuclear spray tube of broadcasting that outer tube, inner tube formed is when not working during the shrink-in airtight cavity, and outer tube terminal surface and cell body limit wall flush this moment.
The clearance between the inner pipe and the outer pipe is 0-10mm, the diameter of the inner hole is 1-20mm, and the diameter of the outer hole is 2-30 mm.
The inner holes and the outer holes are arranged in a staggered manner.
The specific structure of the circulating water tank is as follows: the device comprises a first elbow, a honeycomb rectifier section, a first contraction section, a test section, a first diffusion section, a second diffusion section and a second elbow which are sequentially arranged from one end to the other end in the horizontal direction corresponding to the floor, wherein the bottom of the second elbow is connected with a downstream vertical section, the bottom of the downstream vertical section is sequentially connected with a water pump front rotary circular diffusion section, a water pump front circular downstream section, an axial flow pump, a water pump rear diffusion section, a water pump rear circular DC section, a second contraction section and a fourth elbow through a third elbow, and an upstream vertical section is connected between the fourth elbow and the first elbow; the first elbow, the test section and the second elbow are adjacent to the vacuum pump and the vacuum cylinder through air pipes, and the vacuum test device further comprises a motor for driving the axial flow pump to work.
The outside of the gas core generating tank is provided with connecting pipes which are respectively communicated with the inside of the gas core generating tank from top to bottom, and the connecting pipes are provided with circulating pumps.
Install first manual valve between intake and the electronic ball valve of first stainless steel, install manual valve of second and third between stainless steel silence check valve and the drain, install the manual valve of fourth between the electronic ball valve of second stainless steel and the seeding nuclear department.
And a pressure gauge is arranged on the second branch pipe.
The invention has the following beneficial effects:
aiming at the circulating water body used for a long time, when the circulating water body is transferred from a using facility to a reservoir repeatedly, the water body is contacted with air for a long time, a large amount of air is dissolved in the water body, and the water body with higher air content or a saturated state is formed. When the gas content is too high or the water body is in a saturated state, certain specific scientific experimental research and optical measurement are not facilitated. The air nucleus generating tank connected with the circulating pump is utilized, a large amount of air is injected into the tank by an air compressor, and the air is continuously mixed with the water in the air nucleus generating tank to form high-pressure supersaturated water containing a large amount of micro-bubbles. The high-pressure supersaturated water in the gas nucleus generating tank and the water injected in the water feeding pump are mixed together through the mixer, and then are connected with the double-layer porous nucleus-sowing spray pipe through the pipeline, so that a large number of micro-bubble gas nuclei are sown and injected into the low-pressure closed circulating flowing water body containing the self-oil liquid level, in the process of floating and flowing of the micro-bubbles in the circulating water body, the surfaces of the micro-bubbles and bubbles dissolved in the original water body are subjected to mass exchange, when the air section above the free liquid level of the circulating water body is pumped outwards by using the vacuum pump, the micro-gas in the low-pressure (vacuum state) water body is increased in volume and floats upwards to separate out the original water body and is discharged out of the circulating tank body, and the purpose of quickly reducing the air content of the original water body is achieved.
The invention adopts the double-layer porous nucleus-sowing spray pipe for scattering a large amount of micro-bubbles, high-pressure saturated micro-bubbles are scattered, and the micro-bubbles perform mass exchange with gas dissolved in the original water body in the floating process in a low-pressure flowing environment, so that the gas dissolved in the original water body is separated out, floats above the free liquid level and is pumped away in vacuum, the aim of quickly degassing is fulfilled, and the foundation is laid for scientific research and obtaining of the water body quality meeting the requirements.
The invention is mainly applied to the technical field of ship performance research or special requirements on water quality.
When the invention is used for researching the performance of the ship, such as cavitation noise performance, when the air content in the test water is too high, the invention not only has obvious adverse effect on the cavitation or noise performance of the ship to be measured, but also can affect the optical measurement. For large-tonnage circulating water, when degassing is carried out by adopting a traditional spraying method, the degassing efficiency is relatively low, and a plurality of sets of high-power circulating water pumps and large-volume degassing towers are required. The invention utilizes more economical equipment to generate supersaturated water, a large number of micro-bubble gas nuclei are sprayed through the double-layer porous nucleus spraying pipe and injected into a large-tonnage circulating water body, and the micro-bubbles and gas dissolved in the water are subjected to mass exchange, so that the gas dissolved in the water is separated out and is sucked away by the vacuum pump, and the aim of rapid degassing is fulfilled.
Drawings
FIG. 1 is a schematic structural view of a circulating water tank according to the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a partial schematic view of fig. 2.
FIG. 4 is a schematic view of the degassing system according to the present invention.
FIG. 5 is a schematic view of the structure of the degassing nozzle according to the present invention.
Fig. 6 is a full sectional view taken along section E-E of fig. 5.
Fig. 7 is a full sectional view taken along section F-F in fig. 5.
Wherein: 1. a first elbow; 2. a honeycomb device rectifying section; 3. a first constriction section; 4. a test section; 5. a first diffusion section; 6. a second diffusion section; 7. a second elbow; 8. a downstream vertical section; 9. a third elbow; 10. A water pump front rotating circle diffusion section; 11. a circular downstream section in front of the water pump; 12. an axial flow pump; 13. a water pump rear diffuser section; 14. a circular direct current section behind the water pump; 15. a second constriction section; 16. a fourth elbow; 17. an upstream vertical section; 18. a motor; 19. a floor surface; 20. a ground surface; 21. seeding the core; 22. a fourth manual valve; 23. A second stainless steel ball valve; 24. a second pipeline; 25. a mixer; 26. a first branch pipe; 27. a pressure gauge; 28. a third stainless steel electric ball valve; 29. a gas core generation tank; 30. an air tube; 31. a connecting tube; 32. an air compressor; 33. a circulation pump; 34. a sewage draining outlet; 35. a second branch pipe; 36. a third manual valve; 37. a second manual valve; 38. stainless steel noise reduction check valves; 39. feeding a water pump; 40. a first stainless steel ball valve; 41. a first manual valve; 42. a first pipeline; 43. a water intake; 44. an outer tube; 45. an inner tube; 46. a tank body side wall; 47. sealing the cavity;
4401. an outer bore;
4501. an inner bore.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1-7, the large tonnage nuclear rapid degassing system for circulation water of the present embodiment includes a circulation water tank, the lower part of the circulation water tank is disposed on the ground 20, the upper part of the circulation water tank is disposed on the floor 19, a rapid degassing system is installed in the circulation water tank between the ground 20 and the floor 19, and the rapid degassing system has the following structure: including the intake 43, the intake 43 is established ties in proper order through first pipeline 42 and is had first stainless steel electric ball valve 40, the water feeding pump 39, stainless steel amortization check valve 38, drain 34, the branch has No. one bleeder 26 and No. two bleeder 35 between stainless steel amortization check valve 38 and the drain 34, No. two bleeder 35 are connected with gas nucleus generating tank 29, gas nucleus generating tank 29 is connected with air compressor 32 through air pipe 30, the design of air compressor 32, can be incessantly to the interior injected air of gas nucleus generating tank 29. The first branch pipe 26 is communicated with the second pipeline 24; the nuclear sowing device further comprises a nuclear sowing position 21 positioned in the circulating water tank, a second stainless steel electric ball valve 23, a mixer 25 and a third stainless steel electric ball valve 28 are sequentially connected in series between the nuclear sowing position 21 and the gas nuclear generating tank 29 through a second pipeline 24, and a first branch pipe 26 is connected between the mixer 25 and the third stainless steel electric ball valve 28.
The mounting structure of the seeding core 21 is as follows: including the double-deck porous nuclear spray tube of broadcasting, the double-deck porous nuclear spray tube of broadcasting is installed in circulating water tank, the double-deck porous nuclear spray tube of broadcasting is including fixing the outer tube 44 in cell body limit wall 46 one end, it has a plurality of outer holes 4401 to open on the pipe wall of outer tube 44, the inside cooperation of outer tube 44 has inserted inner tube 45, it has a plurality of holes 4501 to open on the pipe wall of inner tube 45, the other end of cell body limit wall 46 is provided with airtight cavity 47, outer tube 44, the double-deck porous nuclear spray tube of broadcasting that inner tube 45 formed contracts during not working among airtight cavity 47, outer tube 44 terminal surface flushes with cell body limit wall 46 this moment, the mobile article matter when not influencing fluid flow in the circulating water tank.
The gap between the inner tube 45 and the outer tube 44 is 0-10mm, the diameter of the inner bore 4501 is 1-20mm, and the diameter of the outer bore 4401 is 2-30 mm.
The inner holes 4501 are staggered with respect to the outer holes 4401.
The concrete structure of circulating water tank does: the device comprises a first elbow 1, a honeycomb rectifier section 2, a first contraction section 3, a test section 4, a first diffusion section 5, a second diffusion section 6 and a second elbow 7 which are sequentially arranged from one end to the other end in the horizontal direction corresponding to a floor 19, wherein the bottom of the second elbow 7 is connected with a downstream vertical section 8, the bottom of the downstream vertical section 8 is sequentially connected with a water pump front rotary diffusion section 10, a water pump front circular downstream section 11, an axial flow pump 12, a water pump rear diffusion section 13, a water pump rear circular downstream section 14, a second contraction section 15 and a fourth elbow 16 through a third elbow 9, and an upstream vertical section 17 is connected between the fourth elbow 16 and the first elbow 1; the first elbow 1, the test section 4 and the second elbow 7 are adjacent to the vacuum pump and the vacuum cylinder through air pipes, and the vacuum pump testing device further comprises a motor 18 for driving the axial-flow pump 12 to work.
The outside of the gas core generation tank 29 is provided with a connection pipe 31 which is vertically communicated with the inside of the gas core generation tank 29, and a circulation pump 33 is installed on the connection pipe 31.
A first manual valve 41 is arranged between the water intake 43 and the first stainless steel electric ball valve 40, a second manual valve 37 and a third manual valve 36 are arranged between the stainless steel silencing check valve 38 and the sewage outlet 34, and a fourth manual valve 22 is arranged between the second stainless steel electric ball valve 23 and the seeding core 21.
The second branch pipe 35 is provided with a pressure gauge 27.
In the actual use process, the method is completed through the following steps:
the first step is as follows: proper water is injected into the circulating water tank without being filled, so that a free liquid level is ensured in an internal flow passage at the upper part of the water tank, and the air part at the top has a certain height with the free liquid level, so that the gas is conveniently sucked away by vacuum when being separated out from the water subsequently;
the second step is that: ensuring the whole circulating water tank to be closed, starting a vacuum pump, sucking air on the upper part of the free liquid level of the circulating water tank, enabling the water body in the circulating water tank body to be in a vacuum environment with lower pressure, and keeping the vacuum pump in a working state all the time;
the third step: starting an axial flow pump 12 of the circulating water tank to enable water in the water tank to be in a low-speed circulating flow state;
the fourth step: extending the double-layer porous nuclear sowing spray pipe into the circulating water tank from the closed cavity 47;
the fifth step: opening all manual valves and electromagnetic valves (except for the manual valve closest to the waste outlet 34);
and a sixth step: starting a water pump connected with the water intake 43 to normally work;
the seventh step: when the gas core generating tank 29 contains water with a certain volume capacity, the circulating pump 33 at the gas core generating tank 29 is started;
eighth step: starting the air compressor 32, injecting high-pressure gas into the gas nucleus generating tank 29 without stopping, mixing the water body at the water intake 43 with supersaturated water generated in the gas nucleus generating tank 29, and then generating a large amount of micro bubbles through the double-layer porous nucleus-sowing spray pipe, and injecting the micro bubbles into the water body flowing in the circulating water tank;
the ninth step: the water body in the whole circulating water tank runs in a low-pressure low-speed flowing environment, the quick degassing system continuously spreads micro bubbles into the circulating water body, and the vacuum pump continuously pumps out separated air above the free liquid level, so that the aim of quick degassing is fulfilled.
Before the invention, the degassing method mainly adopts a spraying method to degas, namely, the circulating water body is sprayed in a plurality of low-pressure degassing tanks (the tanks contain a large number of plastic ball cores, and the contact area of the sprayed water is increased), the middle upper part of the tank is always kept to be air, the lower part of the tank is water body, the top of the tank is provided with a vacuum pumping hole, namely, water is sprayed continuously to form water drops of a shower head, the contact area of the water drops and the vacuum is increased, and the top of the degassing tank is pumped at low pressure all the time.
The invention comprises a water feeding pump 39, a gas core generating tank 29 (comprising an air compressor 32 and a circulating pump 33 connected with the water feeding pump), a mixer and a double-layer nuclear sowing spray pipe which are connected with each other to form a rapid degassing system. A degassing tank with a huge volume is not needed.
The invention only needs a high-pressure gas nucleus generating tank 29 with small volume, uses the gas nucleus generating tank 29 to generate overfull water, and injects the overfull water into the double-layer porous nucleus-sowing spray pipe through the mixer to scatter a large number of micro-bubble gas nuclei, thereby increasing the contact area of the original water body and bubbles and further rapidly separating out the dissolved gas in the water body.
In the degassing process, the broadcasted microbubbles need to keep a certain floating distance from the free liquid level, and the working time is reserved for the floatation of the microbubbles; and the free liquid level needs to continuously exhaust air outwards to discharge air separated out from the water body.
The pressure in the gas core generating tank 29 can reach Mpa, and the lift of a circulating pump 33 matched with the gas core generating tank can meet the requirement.
The double-layer porous nuclear-seeding spray pipe is placed at a micro-bubble spraying position to select a proper low point position of the circulating water tank, so that a gas core has proper working time (not too long, or part of gas is dissolved in water) in the floating process, the water body of the circulating water tank is in a low negative pressure working environment and has a free liquid level, and the separated gas is continuously pumped away by a vacuum pump in the degassing process, so that the aim of quickly degassing is fulfilled.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (8)
1. A large-tonnage is circulated and is sowed quick degasification system of nuclear with water, its characterized in that: including circulating water tank, circulating water tank's below sets up the position on ground (20), and the top sets up in floor (19) position, installs quick degassing system in the circulating water tank between ground (20) and floor (19), and quick degassing system's structure is: the device comprises a water intake (43), wherein the water intake (43) is sequentially connected in series with a first stainless steel electric ball valve (40), a water feeding pump (39), a stainless steel silencing check valve (38) and a sewage outlet (34) through a first pipeline (42), a first branch pipe (26) and a second branch pipe (35) are branched between the stainless steel silencing check valve (38) and the sewage outlet (34), the second branch pipe (35) is connected with an air nucleus generating tank (29), the air nucleus generating tank (29) is connected with an air compressor (32) through an air pipe (30), and the first branch pipe (26) is communicated with a second pipeline (24); the nuclear reactor is characterized by further comprising a nuclear sowing position (21) located in the circulating water tank, a second stainless steel electric ball valve (23), a mixer (25) and a third stainless steel electric ball valve (28) are sequentially connected in series between the nuclear sowing position (21) and the gas nuclear generating tank (29) through a second pipeline (24), and a first branch pipe (26) is connected between the mixer (25) and the third stainless steel electric ball valve (28).
2. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 1, characterized in that: the mounting structure of the seeding core position (21) is as follows: including the double-deck porous nuclear spray tube of broadcasting, the double-deck porous nuclear spray tube of broadcasting is installed in circulating water tank, and the double-deck porous nuclear spray tube of broadcasting is including fixing outer tube (44) in cell body limit wall (46) one end, it has a plurality of outer holes (4401) to open on the pipe wall of outer tube (44), the inside cooperation of outer tube (44) is inserted inner tube (45), it has a plurality of holes (4501) to open on the pipe wall of inner tube (45), the other end of cell body limit wall (46) is provided with airtight cavity (47), the double-deck porous nuclear spray tube of broadcasting that outer tube (44), inner tube (45) formed is when not working during the shrink-in airtight cavity (47), and outer tube (44) terminal surface flushes with cell body limit wall (46) this moment.
3. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 2, characterized in that: the clearance between the inner tube (45) and the outer tube (44) is 0-10mm, the diameter of the inner hole (4501) is 1-20mm, and the diameter of the outer hole (4401) is 2-30 mm.
4. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 2, characterized in that: the inner holes (4501) and the outer holes (4401) are arranged in a staggered mode.
5. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 1, characterized in that: the specific structure of the circulating water tank is as follows: the device comprises a first elbow (1), a honeycomb rectifier section (2), a first contraction section (3), a test section (4), a first diffusion section (5), a second diffusion section (6) and a second elbow (7) which are sequentially arranged from one end to the other end in the horizontal direction corresponding to a floor (19), wherein the bottom of the second elbow (7) is connected with a downstream vertical section (8), the bottom of the downstream vertical section (8) is sequentially connected with a water pump front rotary diffusion section (10), a water pump front circular downstream section (11), an axial-flow pump (12), a water pump rear diffusion section (13), a water pump rear circular direct-flow section (14), a second contraction section (15) and a fourth elbow (16) through a third elbow (9), and an upstream vertical section (17) is connected between the fourth elbow (16) and the first elbow (1); the first elbow (1), the test section (4) and the second elbow (7) are adjacent to the vacuum pump and the vacuum cylinder through air pipes, and the vacuum pump vacuum test device further comprises a motor (18) for driving the axial flow pump (12) to work.
6. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 1, characterized in that: the gas core generating tank (29) is externally provided with a connecting pipe (31) which is respectively communicated with the inside of the gas core generating tank (29) from top to bottom, and the connecting pipe (31) is provided with a circulating pump (33).
7. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 1, characterized in that: a first manual valve (41) is installed between the water intake (43) and the first stainless steel electric ball valve (40), a second manual valve (37) and a third manual valve (36) are installed between the stainless steel silencing check valve (38) and the sewage outlet (34), and a fourth manual valve (22) is installed between the second stainless steel electric ball valve (23) and the seeding core (21).
8. The large-tonnage water-spreading nuclear rapid degassing system for circulation of claim 1, characterized in that: and a pressure gauge (27) is arranged on the second branch pipe (35).
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| CN202110618301.0A CN113321258B (en) | 2021-06-03 | 2021-06-03 | Large-tonnage is quick degassing system of nuclear with water seeding in circulation |
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2021
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