CN109585046B - Device for uniformly injecting and mixing solution - Google Patents
Device for uniformly injecting and mixing solution Download PDFInfo
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- CN109585046B CN109585046B CN201811473750.5A CN201811473750A CN109585046B CN 109585046 B CN109585046 B CN 109585046B CN 201811473750 A CN201811473750 A CN 201811473750A CN 109585046 B CN109585046 B CN 109585046B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a device for uniformly injecting and mixing solution, which comprises an injection part which is arranged at the upstream along the flow direction of the liquid, wherein the injection part is of a multilayer annular structure and comprises a large-diameter injection straight pipe, the large-diameter injection straight pipe is communicated with a first small-diameter annular bent pipe, a second small-diameter annular bent pipe, a third small-diameter annular bent pipe, … and an nth small-diameter annular bent pipe which are arranged along the long axis direction of the large-diameter injection straight pipe in a concentric circle mode, the radii of the first small-diameter annular bent pipe, the second small-diameter annular bent pipe, the third small-diameter annular bent pipe, the … and the nth small-diameter annular bent pipe are sequentially increased, the centers of the small-diameter annular bent pipes are all on the vertical central axis of the large-diameter injection straight pipe, and the large-diameter injection straight pipe is provided with a plurality of first through holes perpendicular to the long axis direction along the long axis direction. The invention adopts a multilayer annular injection device, ensures that tracer solution injection points can be uniformly distributed in a loop pipeline, can fully converge tracer solution and base solution at a plurality of positions, and has smaller resistance characteristic.
Description
Technical Field
The invention relates to the field of reactor integral hydraulic simulation tests, in particular to a solution uniform injection and mixing device.
Background
The lower chamber mixing test is an important research content in the reactor integral hydraulic simulation test, and the main purpose of the lower chamber mixing test is to obtain the flow share from different loops in the total flow passing through each group of simulated fuel assemblies, and provide reference and guidance for the reactor thermal hydraulic safety design. For a multi-loop reactor, in experimental research, a method of injecting a tracer solution in one loop is generally adopted to distinguish the fluid working medium of the loop from the fluid working medium of the other loops, and the concentration of the tracer solution is measured at an inlet of a simulated fuel assembly to calculate the flow share. In order to ensure the reliability and authenticity of test data, the tracer solution is required to be uniformly mixed with the background solution in the main loop before entering the inlet of the simulation reactor after being injected into the main loop in the mixing test.
The difference between the maximum concentration and the minimum concentration after mixing in the prior art is at least 15%, the problem of mixing the tracer solution with the background solution in a large-caliber small-resistance loop pipeline exists, and the tracer solution cannot be uniformly mixed with the background solution before entering a simulated reactor.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a solution uniform injection and mixing device, which solves the problem of mixing of a tracer solution in a small-resistance large-caliber loop pipeline through a multilayer annular injection pipeline and a straight wing cyclone structure with an inclination angle, ensures that the tracer solution and a background solution are uniformly mixed before entering an inlet of a simulation reactor, and lays a strong foundation for analysis of test data and results.
The invention is realized by the following technical scheme:
a solution uniform injection and mixing device comprises an injection part which is positioned at the upstream along the liquid flow direction, wherein the injection part is of a multilayer annular structure and comprises a large-diameter injection straight pipe, the large-diameter injection straight pipe is communicated with a first small-diameter annular bent pipe, a second small-diameter annular bent pipe, a third small-diameter annular bent pipe, … and an nth small-diameter annular bent pipe which are arranged in a concentric circle manner and have sequentially increased radiuses along the long axis direction of the large-diameter injection straight pipe, the centers of the small-diameter annular bent pipes are all on the vertical central axis of the large-diameter injection straight pipe, the large-diameter injection straight pipe is provided with a plurality of first through holes perpendicular to the long axis direction along the long axis direction, the small-diameter annular bent pipe is provided with a plurality of second through holes passing through the circle center of the large-diameter injection straight pipe along the circumferential direction of the small-diameter annular bent pipe, and the second through holes on the adjacent small-diameter annular bent pipes are arranged in a staggered manner;
still including being in the whirl mixing portion of low reaches, whirl mixing portion is including setting up the whirl ring and being located the cylinder at whirl ring center, through the fin of a plurality of centre of a circle of following circumference evenly distributed between cylinder and the whirl ring, and the fin adopts the welded mode to fix between cylinder and ring.
The plurality of first through holes are distributed at the inlet end and the outlet end of the large-diameter injection straight pipe.
At least one first through hole is arranged between the adjacent small-diameter circular ring-shaped bent pipes.
The rotational flow mixing part further fully mixes the solution primarily mixed by the injection part, and the plurality of fins are arranged clockwise or anticlockwise.
The inclination angle of the wing panel is 10-80 degrees. The angle of the vanes refers to the angle between the vanes and the direction of fluid flow.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the multi-layer annular injection device is adopted, so that tracer solution injection points can be uniformly distributed in a loop pipeline, tracer solution can be fully converged with base solution at multiple positions, the resistance of the injection device to the tracer solution is reduced, and the cyclone mixing part with the inclined straight fin is arranged at the downstream, so that after the tracer solution and the base solution are secondarily mixed by the cyclone device, uniform mixing can be further improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the structure of the present invention.
Reference numbers and corresponding part names in the drawings:
1-large-diameter injection straight pipe, 2-fourth layer small-diameter circular elbow, 3-first through hole, 4-second through hole, 5-wing, 6-cylinder and 7-rotational flow circular ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in figures 1 and 2 of the drawings,
1 injection part
The multi-layer annular injection tube comprises two parts, namely a large-diameter injection straight tube 1 and a small-diameter annular bent tube. The straight pipe section adopts a stainless steel pipe of DN25, and the small-diameter circular ring-shaped bent pipe adopts a stainless steel pipe of DN 10. And (3) opening a welding hole on the side surface of the straight pipe, and inserting the arc bent pipe into the welding hole to be welded with the straight pipe. The annular bent pipe adopts a multilayer symmetrical arrangement mode, can be four layers, and the center of each layer is on the vertical central axis of the large-diameter injection straight pipe 1. The bending radius of each small-diameter circular ring-shaped bent pipe from inside to outside is 40mm, 70mm, 100mm and 130mm respectively. The advantage of adopting the multilayer annular pipe arrangement is that tracer solution injection holes can be arranged more uniformly in the circular pipeline of the loop, and meanwhile, the tracer solution injection holes have smaller resistance characteristics.
2 injection hole arrangement mode
A plurality of first through holes 3 perpendicular to the major axis direction are formed in the major diameter injection straight pipe 1 along the major axis direction, a plurality of second through holes 4 passing through the circle center of the minor diameter circular ring-shaped bent pipe are formed in the circumferential direction of the minor diameter circular ring-shaped bent pipe, and the diameter of each hole is 4 mm. After entering the second through holes 4, the tracer solution flows into the loop main pipeline from the holes and is mixed with the background solution. On the straight tube section, 8 first through-holes 3 are symmetrically formed near the injection inlet end, and 4 first through-holes 3 are symmetrically formed far away from the injection inlet end. The opening angles of the annular bent pipes at the innermost layer are 60 degrees, 120 degrees, 180 degrees and 240 degrees, and the opening angles of the second small-diameter annular bent pipe are 40 degrees, 90 degrees, 140 degrees, 220 degrees, 270 degrees and 320 degrees with the vertical axis of the large-diameter injection straight pipe 1. The opening angle of the third small-diameter circular ring-shaped bent pipe is 30 degrees, 70 degrees, 110 degrees, 150 degrees, 210 degrees, 250 degrees, 290 degrees and 330 degrees with the vertical axis of the large-diameter injection straight pipe 1. The opening angle of the fourth small-diameter circular ring-shaped elbow 4 is 20 degrees, 37.5 degrees, 55 degrees, 72.5 degrees, 90 degrees, 107.5 degrees, 125 degrees, 142.5 degrees, 160 degrees, 200 degrees, 217.5 degrees, 235 degrees, 252 degrees, 5 degrees, 270 degrees, 287.5 degrees, 305 degrees, 322.5 degrees and 340 degrees with the vertical axis of the large-diameter injection straight pipe 1. The main purpose of adopting above-mentioned trompil arrangement mode is to improve and to mix efficiency, ensures that the tracer solution can carry out comparatively even mixture with the background solution after spouting from the injection orifice.
3 straight wing 5 cyclone device with inclination angle
And a swirling part with an inclined straight fin 5 is arranged at the downstream of the multilayer annular injection pipe and is used for fully mixing the tracer solution and the background solution. The device comprises a plurality of fins 5 in total, the angle of inclination of which is 10-80 degrees. In the figure, the direction from the vertical paper surface to the inner side is the liquid flow direction.
By arranging 6 fixed vanes 5 with an inclination of 30 degrees, both an optimum mixing degree and a maximum fluid resistance can be ensured.
And the cyclone ring 7 and the central cylinder 6 are fixed by welding to form a uniform whole. The peripheral swirl ring 7 is welded with a fixed sealing plate, and the sealing plate is compressed and sealed through a pair of opening rings on the pipeline in actual installation. After passing through the device, the tracer solution can be fully mixed with the background solution in the main loop, and the deviation between the maximum concentration and the minimum concentration in the loop is within 6%.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A device for uniformly injecting and mixing solution is characterized by comprising an injection part which is arranged at the upper stream along the flow direction of liquid, wherein the injection part is of a multilayer annular structure and comprises a large-diameter injection straight pipe (1), the large-diameter injection straight pipe (1) is communicated with a first small-diameter annular bent pipe, a second small-diameter annular bent pipe, a third small-diameter annular bent pipe, … and an nth small-diameter annular bent pipe which are arranged in a concentric circle and have sequentially increased radiuses along the long axis direction of the large-diameter injection straight pipe, the centers of the small-diameter circular ring-shaped bent pipes are all arranged on the vertical central axis of the large-diameter injection straight pipe (1), the large-diameter injection straight pipe (1) is provided with a plurality of first through holes (3) vertical to the long axis direction along the long axis direction, the small-diameter circular ring-shaped bent pipe is provided with a plurality of second through holes (4) passing through the circle center along the circumferential direction, and the second through holes (4) on adjacent small-diameter circular ring-shaped bent pipes are arranged in a staggered manner;
still including being in the whirl mixing portion of low reaches, including setting up the ring and being located the cylinder at ring center, through wing (5) of crossing the centre of a circle along a plurality of evenly distributed of circumference between cylinder and the ring, wing (5) adopt the welded mode to fix between cylinder and ring.
2. The solution homogenizing injection and mixing device according to claim 1, characterized in that a plurality of first through holes (3) are distributed at the inlet end and the outlet end of the large diameter injection straight pipe (1).
3. The device for the homogeneous injection and mixing of solutions according to claim 2, characterized in that at least one first through hole (3) is provided between adjacent small-diameter circular elbows.
4. The device for the homogeneous injection and mixing of solutions as set forth in claim 1, wherein the plurality of fins (5) are arranged clockwise or counterclockwise.
5. Device for the homogeneous injection and mixing of solutions according to claim 4, characterized in that the inclination of the fins (5) is comprised between 10 and 80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473750.5A CN109585046B (en) | 2018-12-04 | 2018-12-04 | Device for uniformly injecting and mixing solution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811473750.5A CN109585046B (en) | 2018-12-04 | 2018-12-04 | Device for uniformly injecting and mixing solution |
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| CN109585046A CN109585046A (en) | 2019-04-05 |
| CN109585046B true CN109585046B (en) | 2022-02-01 |
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