CN103861511A - Mining porous spiral-type foam generating device - Google Patents
Mining porous spiral-type foam generating device Download PDFInfo
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- CN103861511A CN103861511A CN201410056367.5A CN201410056367A CN103861511A CN 103861511 A CN103861511 A CN 103861511A CN 201410056367 A CN201410056367 A CN 201410056367A CN 103861511 A CN103861511 A CN 103861511A
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Abstract
The invention discloses a mining porous spiral-type foam generating device. The mining porous spiral-type foam generating device comprises a compressed air joint (1), a nozzle body (2), a gas-liquid mixing chamber (5), porous spiral-type foamers (6), a foaming cylinder body (7) and a foam outlet joint (10), wherein the rear end of the nozzle body (2) is provided with at least one outlet nozzle; a nozzle cavity in the nozzle body (2) is of a circular truncated cone contracted shape; the compressed air joint is connected with the nozzle body; the nozzle body is installed at the inner side of the front end of the gas-liquid mixing chamber; the porous spiral-type foamers are installed in the foaming cylinder body. A multi-nozzle jet flow structure provided by the invention can achieve low-resistance high-efficiency mixing of a gas phase and a liquid phase. A wire surface high-multiple foaming and spiral low-resistance high-efficiency heat transfer mass transfer coupling mechanism is adopted for foaming, so that the foaming performance of the device is improved greatly; the generated foam is low in wind to foam ratio, is high in foaming quantity and is high in foam forming ratio; the resistance loss in the mixing and foaming process is reduced; the driving pressure of the device is improved; easily damage moving components in a turbulent flow foaming device are discarded; the device foaming reliability is improved.
Description
Technical field
The present invention relates to a kind of foam-making apparatus, specifically the spiral foam-making apparatus of a kind of mining porous, belongs to foam-making apparatus field.
Background technology
Foam dust suppression is the important dust-settling technology means in high concentration Chan Chen district, colliery, research both at home and abroad shows, foam is in to the processing procedure of dust, there is the incomparable adhesion of water smoke good, area coverage is large, the advantage that wetting speed is fast, this technology is in the U.S., Britain, the former Soviet Union, the mining areas such as China are applied, but in foam dust suppression process, because foam maker structural design is unreasonable, exist foaming process resistance large, foaming efficiency is low, the defects such as product bubble ability is weak, make its cost sharply increase, seriously restrict the large-scale promotion application of this technology.
At present, coal mine downhole foam depositing dust foam device used mainly contains net formula and two kinds of structures of disturbed flow type.Wherein, the foaming of net formula refers to expanding foam solution is sprayed to wire side, form liquid film, by air blast (fan), the foam solution on wire side is bubbled, if expanding foam solution is uniformly dispersed at wire side, foam conversion ratio can reach 95%, and coefficient of foaming can reach more than 100 times, but in the specific implementation, be difficult to guarantee that expanding foam solution is dispersed on wire side; Meanwhile, due to generate foam air content too high, foam be subject to distinguished and admirable affect yielding, the non-constant of foam stability; And net formula frothing foam outlet pressure is very low, foam delivery is limited in one's ability, especially, in the high resistant transmitting procedure of carrying out foam, is prone to the problem being short of power.
Disturbed flow type foaming refers to by flow-disturbing parts, change Liquid Flow path, extend the time of contact of gas-liquid, expand gas-liquid contact area, increase the chance of gas-liquid mixed, collision, extruding, improve gas dissolution rate, make the foam of its generation finer, evenly fine and close, flow-disturbing parts mainly contain spiral and two kinds of structures of filling medium formula.As: disclosed United States Patent (USP) on February 20 " Air/liquidstaticfoamgenerator " (application number: US8/2509814 in 1996, publication number: US054926556), it adopts and is arranged on the left and right spiral organ replacing in cylinder and carries out water conservancy diversion, reduce largely the eddy current loss of foaming link, promote foaming effect, but its helical structure is free body, but not continuous member, probably there is new eddy current group in foam, energy loss is difficult to determine in left-and-right spiral transient process, disclosed Chinese patent on November 23 " gas-liquid proportioning mixed foam maker of compressed gas foam fire-fighting system " (application number: 201110186008.8 in 2011, publication number: 102247673A), it is by setting up mixed foaming chamber, and at the indoor filling spheric granules of mixed foaming, make gas-liquid flow after each particle, produce whirlpool by " Karman vortex street " effect, kinetic energy is converted to can in foam, increase coefficient of foaming, but it is strict that this foaming mode requires spheric granules, runner is narrow and small, overall structure reliability is poor, need to regularly replace, dismounting, keep in repair also more difficult, be not suitable for the adverse circumstances such as down-hole water quality inferiority.
Summary of the invention
The problem existing for above-mentioned prior art, the invention provides the spiral foam-making apparatus of a kind of mining porous, not only can carry out the foaming of high multiple, high one-tenth bubble rate; And foaming process drag losses is little, foam jet great efforts, the foam of generation is more stable.
To achieve these goals, the spiral foam-making apparatus of this mining porous comprises pressure wind joint, nozzle body, gas-liquid mixed chamber, the spiral bubbler of porous, foaming cylindrical shell and foam outlet joint; The front end outer of described nozzle body is provided with deck, and rear end is provided with at least one outlet nozzle; It is contraction-like that nozzle chambers in nozzle body is round platform; Described pressure wind joint is connected with the front end of nozzle body; Described nozzle body is arranged on front end inner side, gas-liquid mixed chamber; On the anterior sidewall of described gas-liquid mixed chamber, have imbibition chamber; Described imbibition chamber place is provided with liquid inlet joint; The rear end of gas-liquid mixed chamber is connected with the front end of foaming cylindrical shell, and the rear end of foaming cylindrical shell is connected with foam outlet joint; The spiral bubbler of described porous is arranged in foaming cylindrical shell.
Preferably, described spiral bubbler comprises central shaft and is arranged on the helical blade in central shaft, has multiple circular holes on described helical blade.
Preferably, the diameter of described central shaft is no more than 1/10 of helical blade outside diameter, or central shaft is hollow-core construction.When the aperture of circular hole on helical blade is 3～5mm, helical blade pitch 10mm～15mm.
Preferably, front portion and the trunnion in the indoor chamber of described gas-liquid mixed are cylindrical cavity, and rear portion is diffused cavity.
Preferably, described nozzle body rear end is provided with multiple contraction-like outlet nozzles that are, and multiple outlet nozzles are centrosymmetric on the jet expansion section of nozzle body.Wherein, best in the time that the quantity of outlet nozzle is 5～7.By jet nozzle being made as to multiinjector shape, can obviously reduce course of injection drag losses, the interaction between strengthening injection stream, improve the disturbance rejection of device, make mixing more stable, also changed conventional single injector jet velocity high, the problem that two-phase mixing intensity is low.
Preferably, the end of described porous spiral bubbler is provided with external screw thread; The inwall of described foam outlet joint is provided with L-type fixed pedestal, and on pedestal, cover has fixed bar, and the center of fixed bar offers internal thread circular hole; Porous spiral bubbler is threaded with fixed bar.
Preferably, the front end of described gas-liquid mixed chamber is provided with internal thread, and nozzle body outside is provided with external screw thread, and gas-liquid mixed chamber is threaded with nozzle body; The rear end of gas-liquid mixed chamber is provided with external screw thread, and foaming barrel front end is provided with internal thread, and gas-liquid mixed chamber is connected with foaming cylinder screw; Between described gas-liquid mixed chamber and nozzle body and foaming cylindrical shell, be respectively equipped with seal washer.
Compared with prior art, the spiral foam-making apparatus of porous in the present invention, adopt the high multiple foaming of porous to foam with spiral high-efficiency low-resistance heat and mass coupling mechanism, first pass through helical structure, one dimension foam is flowed and is converted to Three-dimensional Flow, weaken the axial shearing stress of foam, strengthen radially and circumferential shearing stress, increase the chance of gas-liquid mixed, collision, extruding, expand the effect of foam Heat and mass transfer between phases, the mass-energy conversion of gas-liquid two-phase can complete within the utmost point short time, has improved gas-liquid mixed intensity; Simultaneously, can make expanding foam solution fully foaming under the effect of high pressure, high velocity air by the intensive mesh on helical blade, by the low-resistance flow-disturbing of multiple tracks helical structure, mesh thickness of liquid film increases, the formation of bubble is smooth, coalescence between bubble weakens, and through the stack foaming of multiple tracks stratum reticulare, foaming process is more abundant, the torsion mechanism of spiral flow-disturbing in addition, can make toughness and the elasticity of foam obviously strengthen, half foam life period can improve several times, becomes bubble rate and coefficient of foaming significantly to promote; The low resistive outlet pressure that also significantly improves device of helical structure, the driving force of device is significantly strengthened, the foam jet great efforts that produce through apparatus of the present invention, foam is evenly fine and smooth, can meet the requirement of foam engineering to high pressure, high resistant dispensing, the foam of high-quality has improved the result of use of this technology significantly; In addition the rapid wear moving component that device has also been forgone in disturbed flow type foam device, simple in structure, dismounting, easy to maintenance, has improved the reliability of equipment, break through foam-making apparatus in the time of the severe operating environment in reply down-hole, the bottleneck that foaming effect is poor, reliability is not enough.
This contrive equipment is not only applicable to down-hole foam field of engineering technology, carries out the field of engineering technology such as the efficient fire-fighting fire extinguishing foaming have equally extremely important use at needs.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of nozzle body in the present invention;
Fig. 3 is the right view of Fig. 2;
Fig. 4 is the structural representation of porous spiral bubbler in the present invention;
Fig. 5 is the right view of Fig. 4;
Fig. 6 is the structural representation of fixed bar in the present invention;
Fig. 7 is the right view of Fig. 6.
In figure: 1, air intake joint, 2, nozzle body, 2-1, jet expansion section, 2-2, outlet nozzle, 2-3, deck, 3, seal washer, 4, liquid inlet joint, 5, gas-liquid mixed chamber, 6, porous spiral bubbler, 6-1, helical blade, 6-2, central shaft, 6-3, circular hole, 7, foaming cylindrical shell, 8, pedestal, 9, fixed bar, 9-1, fixing circular hole, 9-2, internal thread circular hole, 10, foam outlet joint, A, nozzle chambers, B, low-pressure cavity, C, trunnion chamber, D, diffusion chamber, E, imbibition chamber.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the spiral foam-making apparatus of a kind of mining porous of the present invention, comprises and presses wind joint 1, nozzle body 2, gas-liquid mixed chamber 5, the spiral bubbler 6 of porous, foaming cylindrical shell 7 and foam outlet joint 10; The front end outer of described nozzle body 2 is provided with deck 2-3, and rear end is provided with at least one outlet nozzle 2-2; It is contraction-like that nozzle chambers A in nozzle body 2 is round platform; Described pressure wind joint 1 is connected with the front end of nozzle body 2; Described nozzle body 2 is arranged on 5 front end inner sides, gas-liquid mixed chamber; On the anterior sidewall of described gas-liquid mixed chamber 5, have imbibition chamber E; E place, described imbibition chamber is provided with liquid inlet joint 4; The rear end of gas-liquid mixed chamber 5 is connected with the front end of foaming cylindrical shell 7, and the rear end of foaming cylindrical shell 7 is connected with foam outlet joint 10; The spiral bubbler 6 of described porous is arranged in foaming cylindrical shell 7.
When use, air line can be connected with pressing wind joint 1, expanding foam solution pipeline is connected with liquid inlet joint 4, be that round platform is contraction-like because nozzle body 2 is interior, wind speed will increase gradually, finally by nozzle body 2 ejection at a high speed, form turbulent jet, under the effect of turbulent jet boundary effect, surrounding air is entrainmented in a large number, near nozzle body 2, form low-pressure cavity B, make expanding foam solution to enter low-pressure cavity B by imbibition chamber E swimmingly, press wind in the C of trunnion chamber, to complete first mixing with expanding foam solution, conduct heat fast, mass transfer, because gas velocity is higher, in gas-liquid mixed chamber 5, the first foam void fraction forming is relatively high, how in the form of a ring, in diffusion chamber D, fluid velocity reduces gradually, pressure recovers gradually, and reach maximum static pressure in exit.Wherein, when front portion and the trunnion in the indoor chamber of gas-liquid mixed are all made as cylindrical cavity, rear portion is made as diffused cavity, be to form low-pressure cavity B between anterior cylindrical cavity and nozzle body 2, the cylindrical cavity of trunnion is trunnion chamber C, diffused cavity is diffusion chamber D, and this kind of structure is more suitable for the first mixing of gas-liquid.
The first ring-type foam stream producing that mixes, enter afterwards in foaming cylindrical shell 7, under 6 effects of porous spiral bubbler, carry out high-intensity secondary mixed foaming, annular flow is under helical blade 6-1 effect on the one hand, there is multi tension, shearing, stirring action, significantly improve gas-liquid contact area, extended gas-liquid contact time, promoted foaming effect; On the other hand, the intensive mesh being formed by the circular hole 6-3 on helical blade 6-1 can make expanding foam solution fully foaming under the effect of air-flow, has that wire side foaming bubble production volume is large, coefficient of foaming is high, become the high feature of bubble rate, and the foam of generation is fine, evenly fine and close.This foaming process drag losses is little, foam jet great efforts, and the foam of generation is more stable, and the foam of high-quality has significantly improved the result of use of this technology.Wherein, when imbibition chamber E is the cylindrical cavity tilting, when liquid inlet joint 4 along inclined direction enters gas-liquid mixed chamber 5, can further reduce in gas-liquid mixed process, that is caused by central collision follows spray loss, more easily carries out mass-energy conversion between gas-liquid, mutually mixes and also more easily carries out.
As shown in Figure 4 and Figure 5, described spiral bubbler 6 comprises central shaft 6-2 and is arranged on the helical blade 6-1 on central shaft 6-2, has multiple circular hole 6-3 on helical blade 6-1.Wherein, the aperture of the upper circular hole 6-3 of helical blade 6-1 is 3～5mm, and circular hole number is can arrange and be advisable at most on area of section, and helical blade 6-1 pitch is 10mm～15mm.For avoiding central shaft 6-2 to cross the thick foam maker interior flow field that affects, can make the diameter of central shaft 6-2 be no more than 1/10 of helical blade 6-1 outside diameter, or adopt the central shaft 6-2 of hollow-core construction.
As shown in Figures 2 and 3, the rear end of described nozzle body 2 is provided with multiple contraction-like outlet nozzle 2-2 that are, and multiple outlet nozzle 2-2 are centrosymmetric on the jet expansion section 2-1 of nozzle body 2, are set to multiinjector structure by nozzle body 2; Multiinjector structure can overcome the shortcoming that central speed is high, boundary speed is low that single injector jet exists, and has strengthened jet internal mix dynamics, makes jet velocity and pressure oscillation amplitude less, and jet sprays more stable, and power is stronger.The quantity of outlet nozzle 2-2 is too much or very fewly all jet is had to impact, and when quantity is 5～7, effect is best.
As shown in Fig. 1, Fig. 6 and Fig. 7, can go out to arrange external screw thread at the end of porous spiral bubbler 6; The inwall of foam outlet joint 10 is provided with L-type fixed pedestal 8, and on pedestal 8, cover has fixed bar 9, the center of fixed bar 9 to offer internal thread circular hole 9-2, is provided with symmetrical circular hole 9-1 near fixed bar 9 up-and-down boundaries; When fixing, first porous spiral bubbler 6 end external screw threads are connected on internal thread circular hole 9-2, can be by regulating reach to change the position of porous spiral bubbler 6 in foaming cylindrical shell 7, by two symmetrical circular hole 9-1, fixed bar 9 is set on L-type fixed pedestal 8 again, porous spiral bubbler 6 can not only be arranged on like this in foaming cylindrical shell 7, can also prevent that porous spiral bubbler 6 from non-directional occurring and move, device dismounting, safeguard more convenient.
Preferably, the front end of described gas-liquid mixed chamber 5 is provided with internal thread, and nozzle body 2 outsides are provided with external screw thread, and gas-liquid mixed chamber 5 is threaded with nozzle body 2; The rear end of gas-liquid mixed chamber 5 is provided with external screw thread, and foaming cylindrical shell 7 front ends are provided with internal thread, and gas-liquid mixed chamber 5 is threaded with foaming cylindrical shell 7; Between described gas-liquid mixed chamber 5 and nozzle body 2 and foaming cylindrical shell 7, be respectively equipped with seal washer 3.The mode that employing is threaded connects, easily installing/dismounting, and seal washer 3 makes to connect tightr, avoids occurring occurring because of gap gas leakage or the situation of hindering gas-liquid mixed.
In addition, the use of the spiral foam-making apparatus of porous of the present invention is not only confined under coal mine, carries out the field of engineering technology such as the efficient fire-fighting fire extinguishing foaming have equally extremely important use at needs.
Claims (10)
1. the spiral foam-making apparatus of mining porous, comprises and presses wind joint (1), nozzle body (2), gas-liquid mixed chamber (5), the spiral bubbler of porous (6), foaming cylindrical shell (7) and foam outlet joint (10); It is characterized in that, the front end outer of described nozzle body (2) is provided with deck (2-3), and rear end is provided with at least one outlet nozzle (2-2); It is contraction-like that nozzle chambers (A) in nozzle body (2) is round platform; Described pressure wind joint (1) is connected with the front end of nozzle body (2); Described nozzle body (2) is arranged on front end inner side, gas-liquid mixed chamber (5); On the anterior sidewall of described gas-liquid mixed chamber (5), have imbibition chamber (E); Liquid inlet joint (4) is located to be provided with in described imbibition chamber (E); The rear end of gas-liquid mixed chamber (5) is connected with the front end of foaming cylindrical shell (7), and the rear end of foaming cylindrical shell (7) is connected with foam outlet joint (10); The spiral bubbler of described porous (6) is arranged in foaming cylindrical shell (7).
2. the spiral foam-making apparatus of the mining porous of one according to claim 1, it is characterized in that, described spiral bubbler (6) comprises central shaft (6-2) and is arranged on the helical blade (6-1) in central shaft (6-2), has multiple circular holes (6-3) on described helical blade (6-1).
3. the spiral foam-making apparatus of the mining porous of one according to claim 2, is characterized in that, the diameter of described central shaft (6-2) is no more than 1/10 of helical blade (6-1) outside diameter, or central shaft (6-2) is hollow-core construction.
4. according to the spiral foam-making apparatus of the mining porous of the one described in claim 2 or 3, it is characterized in that, the aperture of the upper circular hole (6-3) of described helical blade (6-1) is 3～5mm, helical blade (6-1) pitch 10mm～15mm.
5. according to the spiral foam-making apparatus of the mining porous of one described in claim 1,2 or 3, it is characterized in that, front portion and the trunnion of described gas-liquid mixed chamber (5) inner chamber are cylindrical cavity, and rear portion is diffused cavity.
6. according to the spiral foam-making apparatus of the mining porous of one described in claim 1,2 or 3, it is characterized in that, described nozzle body (2) rear end is provided with multiple contraction-like outlet nozzles (2-2) that are, and multiple outlet nozzles (2-2) are centrosymmetric on the jet expansion section (2-1) of nozzle body (2).
7. the spiral foam-making apparatus of the mining porous of one according to claim 6, is characterized in that, the quantity of described outlet nozzle (2-2) is 5～7.
8. the spiral foam-making apparatus of the mining porous of one according to claim 5, it is characterized in that, described nozzle body (2) rear end is provided with multiple contraction-like outlet nozzles (2-2) that are, and multiple outlet nozzles (2-2) are centrosymmetric on the jet expansion section (2-1) of nozzle body (2).
9. the spiral foam-making apparatus of the mining porous of one according to claim 8, is characterized in that, the end of described porous spiral bubbler (6) is provided with external screw thread; The inwall of described foam outlet joint (10) is provided with L-type fixed pedestal (8), and the upper cover of pedestal (8) has fixed bar (9), and the center of fixed bar (9) offers internal thread circular hole (9-2); Porous spiral bubbler (6) is threaded with fixed bar (9).
10. the spiral foam-making apparatus of the mining porous of one according to claim 9, it is characterized in that, the front end of described gas-liquid mixed chamber (5) is provided with internal thread, and nozzle body (2) outside is provided with external screw thread, and gas-liquid mixed chamber (5) are threaded with nozzle body (2); The rear end of gas-liquid mixed chamber (5) is provided with external screw thread, and foaming cylindrical shell (7) front end is provided with internal thread, and gas-liquid mixed chamber (5) are threaded with foaming cylindrical shell (7); Between described gas-liquid mixed chamber (5) and nozzle body (2) and foaming cylindrical shell (7), be respectively equipped with seal washer (3).
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| CN107725098A (en) * | 2017-11-08 | 2018-02-23 | 中国矿业大学(北京) | A kind of device for preventing and treating the mined out flame range of underground coal mine |
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| CN104632216A (en) * | 2015-01-16 | 2015-05-20 | 中国矿业大学 | Rotary jet self-priming type short-range strengthening foam production device for dust suppression of coal mining machine |
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| CN107725098A (en) * | 2017-11-08 | 2018-02-23 | 中国矿业大学(北京) | A kind of device for preventing and treating the mined out flame range of underground coal mine |
| CN108579343A (en) * | 2018-02-27 | 2018-09-28 | 三明学院 | A kind of device for absorbing tail gas |
| CN108704504A (en) * | 2018-08-14 | 2018-10-26 | 嘉诚环保工程有限公司 | Venturi microbubble generator and its application in catalytic ozonation |
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