CN103586145A

CN103586145A - Three-inlet spiral slag pushing type hydraulic cyclone

Info

Publication number: CN103586145A
Application number: CN201310616189.2A
Authority: CN
Inventors: 范强; 国国敬; 李鹏宇
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2013-11-27
Filing date: 2013-11-27
Publication date: 2014-02-19

Abstract

The invention relates to a three-inlet spiral slag pushing type hydraulic cyclone, which comprises a settlement pot, an anti-backflow device, an inlet, an inlet pipe, a cover plate, an overflow pipe, a cylindrical body, a cone, an underflow pipe, a valve and a spiral slag pusher. The inlet design of the hydraulic cyclone is a three-inlet structure, the inlet employs three narrow and long gradually changed rectangular inlet pipes with three same cross section shapes, three inlets are symmetrically arranged with an angle presenting 120 DEC, the long edge of the rectangle is parallel to axis of the hydraulic cyclone, wherein one long edge is tangent with the inner surface of the cylindrical body, separation efficiency can be improved by the structure; the settlement pot is connected at the underflow port, the anti-backflow device is added in the settlement pot for preventing phenomenon of liquid leakage; a cylindrical hopper is connected at the lower part of the settlement pot, a spiral is arranged in the cylindrical hopper, and a speed regulation motor is used for uninterruptedly rotating the spiral for discharging solid slag though a spiral shaft outside the cylindrical hopper. According to the invention, slag deposited at the underflow port can be discharged in an automatic, stable and adjustable mode.

Description

A kind of three entrance spirals push away slag type hydrocyclone

Technical field

The present invention relates to a kind of three entrance spirals and push away slag type hydrocyclone, is the device that purifies the petroleum drilling fluid returning out from shaft bottom.

Background technology

At present, known hydrocyclone structure is to be formed by overflow pipe, feed pipe, cylindrical shell, cone, cover plate, underflow pipe manufacture.Pending liquid relies on tangential forced feed and produces and rotatablely moves, utilize the separated solid-liquid of centrifugal sedimentation, and hydrocyclone is directly got rid of or get rid of after underflow opening is adjustable to solid slag by hydrocyclone desilting mouth, the easy like this underflow opening that causes stops up, thereby affect hydrocyclone work, even can not work.At present, hydrocyclone generally adopts single feed pipe charging, this just causes the axial dissymmetry of entrance structure, make the liquid that enters eddy flow chamber flow the axial line that cyclone will be departed from formed vortex core, like this, also skew thereupon of the vortex core of the formed back overfall of isolated water under the effect of centrifugal force.Because the each several parts such as overfall, eddy flow chamber, cone segments and underflow opening of hydrocyclone manufacture and design by certain axiality requirement, therefore the water of separating can not be discharged well from overfall, and come liquid further to mix with follow-up, the water content that is equivalent to make entrance carry out liquid strengthens, so just strengthened separated difficulty, and then separative efficiency is declined to some extent.In order to solve in clean drilling liquid, by the caused whirlpool misalignment of single entrance feed pipe charging hydrocyclone axial line, thereby make work not steady, separative efficiency declines and underflow opening deslagging freely, does not easily stop up and the problem of cylindrical shell eddy flow chamber spillage, designs a kind of new cyclone very necessary.

Summary of the invention

The present invention seeks to stop up and improve in order to overcome existing hydrocyclone underflow opening the deficiency of whirlpool off-centring, provide a kind of three entrance spirals to push away slag type hydrocyclone, this hydrocyclone can not only improve the treating capacity of cyclone preferably, improve the whirlpool off-centring that single entrance structure brings, and then the adverse effect that separative efficiency is declined, and deslagging that can be automatic, continuous, adjustable, and make underflow opening keep clog-free state and process eddy flow chamber spillage and control the problem that eddy flow intraluminal fluid flows flow velocity.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of three entrance spirals of the present invention push away slag type hydrocyclone, mainly settling tank, anti-return device, entrance, feed pipe, cover plate, overflow pipe, cylindrical shell, cone, underflow pipe, valve and spiral clinker pusher structure, consist of, described spiral clinker pusher structure consists of buncher, shaft coupling, key, clutch shaft bearing end cap, taper roll bearing, packing ring, helical axis, spiral, hopper slag notch, bearing block, base, self-aligning bearing, the second bearing (ball) cover, hopper, hopper slag inlet, flange, flange cushion film.

The entry design of hydrocyclone is three entrance structures, described entrance adopts the long and narrow gradual change rectangle feed pipe of three identical cross-sectional shapes, and three entrances are 120 degree and are arranged symmetrically with, the long limit of its rectangle is parallel to hydrocyclone axis, wherein a long limit and cylinder inner surface are tangent, this structure can make separative efficiency improve, the axial symmetry in its flow field is better, this is mainly because the section configuration of rectangle charging aperture can be close to hydrocyclone shell of column wall, can eliminate the dead band that causes charging short circuit so as far as possible, make feeding liquid stream more steady, more smooth, compare single entrance structure, can better improve the adverse effect that separative efficiency that eddy current misalignment brings declines, entrance is communicated with cylindrical shell by three feed pipes, on three feed pipes, is equipped with valve, by controlled valve, the flow velocity of eddy flow intraluminal fluid stream is control effectively, and makes it reach the suitable flow velocity of separated solid-liquid, described cylindrical shell eddy flow chamber nominal diameter is set to 400～500mm, can increase its treating capacity to rotary fluid, thereby reduces the usage quantity of cyclone cylindrical shell, at underflow opening place, connect a settling tank, in settling tank, also install an anti-return device additional, further the solid slag that contains a small amount of liquid phase being flowed down by cylindrical shell is carried out to separation again, prevent the phenomenon of leakage, below settling tank, connect a cylindrical shape hopper, one spiral is installed in hopper, hopper external application one buncher passes through helical axis, ceaselessly rotating screw is got rid of solid slag, and the number that can need discharge according to solid slag, by regulating the rotating speed of buncher to change slag dumping speed, thereby realize automatic, continuous, adjustable being excluded of slag of underflow opening deposition, and can not result in blockage.

Beneficial effect of the present invention

1, three long and narrow gradual change rectangle entrances of this employing, and being 120 degree is arranged symmetrically with, can eliminate the dead band that causes charging short circuit as far as possible, make feeding liquid stream more steadily, more smooth, compare single entrance structure, can better improve the adverse effect that separative efficiency that eddy current misalignment brings declines separative efficiency is improved, the axial symmetry in its flow field is also better; 2, at feed pipe place, be provided with valve, can effectively eddy flow intraluminal fluid be flowed to flow control in the highest velocity interval of separative efficiency by controlled valve.3, adopt under underflow opening and connect a settling tank and spiral slag-draining device, settling tank plays the effect that solves leakage, and spiral is got rid of solid slag, realizes automatic, steady, adjustable being excluded of slag of underflow opening deposition, and the phenomenon that can not result in blockage.4, cylindrical shell eddy flow chamber nominal diameter is set to 400～500mm, and a cylindrical shell body just can be realized drilling fluid delivery and process.

Accompanying drawing explanation

Fig. 1 is the structural representation that a kind of three entrance spirals of the present invention push away slag type hydrocyclone;

Fig. 2 is settling tank structural representation of the present invention;

Fig. 3 is spiral clinker pusher structure schematic diagram of the present invention;

Fig. 4 is the front view of cylindrical shell of the present invention and feed pipe;

Fig. 5 is the A-A cutaway view of Fig. 4.

In figure: 1. variable speed electric motors, particularly, 2. shaft coupling, 3. key, 4. clutch shaft bearing end cap, 5. taper roll bearing, 6. packing ring, 7. helical axis, 8. spiral, 9. hopper slag notch .10, bearing block .11. base, 12. self-aligning bearings, 13. second bearing (ball) covers, 14. hoppers, 15. hopper slag inlets, 16. flanges, 17. flange cushion films, 18. settling tanks, 19. anti-return devices, 20. entrances, 21. feed pipes, 22. cover plates, 23. overflow pipes, 24. cylindrical shells, 25. cones, 26. underflow pipes, 27. valves.

The specific embodiment

Below in conjunction with drawings and Examples, the present invention is further described:

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Fig. 5, a kind of three entrance spirals of the present invention push away slag type hydrocyclone, mainly by settling tank 18, anti-return device 19, entrance 20, feed pipe 21, cover plate 22, overflow pipe 23, cylindrical shell 24, cone 25, underflow pipe 26, valve 27 and spiral clinker pusher structure form, described spiral clinker pusher structure is by buncher 1, shaft coupling 2, key 3, clutch shaft bearing end cap 4, taper roll bearing 5, packing ring 6, helical axis 7, spiral 8, hopper slag notch 9, bearing block 10, base 11, self-aligning bearing 12, the second bearing (ball) cover 13, hopper 14, hopper slag inlet 15, flange 16, flange cushion film 17 forms.

The entrance 20 of hydrocyclone is designed to three entrance structures, described entrance 20 adopts the long and narrow gradual change rectangle feed pipe 21 of three identical cross-sectional shapes, and three entrances 20 are 120 degree and are arranged symmetrically with, the long limit of its rectangle is parallel to hydrocyclone axis, and wherein a long limit and cylindrical shell 24 inner surfaces are tangent; Entrance 20 is communicated with cylindrical shell 24 by three feed pipes 21, on three feed pipes 21, is equipped with valve 27, and the flow velocity of 27 pairs of eddy flow intraluminal fluid streams of valve control effectively, and makes it reach the suitable flow velocity of separated solid-liquid; Described cylindrical shell 24 eddy flow chamber nominal diameters are set to 400～500mm, can increase its treating capacity to rotary fluid, thereby reduce the usage quantity of cyclone cylindrical shell 24; At underflow opening 26 places, connect a settling tank 18, in settling tank 18, also install an anti-return device 19 additional, further the solid slag that contains a small amount of liquid phase being flowed down by cylindrical shell 24 is carried out to separation again, prevent the phenomenon of leakage; Settling tank 18 connects a cylindrical shape hopper 14 below, interior installation one spiral 8 of hopper 14, hopper 14 external application one bunchers 1 are by helical axis 7, ceaselessly rotating screw 8 is got rid of solid slag, and the number that can need discharge according to solid slag, by regulating the rotating speed of buncher 1 to change slag dumping speed, thereby realize automatic, continuous, adjustable being excluded of slag of underflow opening 26 depositions, and can not result in blockage.

Pending liquid relies on tangential forced feed by three feed tubes 20, and generation rotatablely moves, simultaneously, can control effectively by 27 pairs of liquid stream speed of rotatablely moving of the valve on switch feed pipe, solid-liquid is isolated in recycling centrifugal sedimentation, isolated liquid is upwards discharged by the overflow pipe 23 on cover plate 22, solid slag is settled down to underflow opening 26, by anti-return device 19, enter settling tank 18, can be further separated the slag settling down and a small amount of liquid phase, liquid phase flows back to cylindrical shell 20 by anti-return device 19, and the solid slag after separation continues sedimentation again, by hopper slag inlet 15, fall into hopper 14, the helical axis 7 driving by buncher 1 again, can be automatic by spiral 8, continuously, adjustable gets rid of hopper 14 by solid slag by hopper slag notch 9, thereby realized three entrance structures and can improve preferably the whirlpool off-centring that single entrance form brings, and then the adverse effect that separative efficiency is declined, and realized automatically, continuously, adjustable deslagging, and make underflow opening 26 keep clog-free state, prevented the obstruction of underflow opening 26.

Claims

1. an entrance spiral pushes away slag type hydrocyclone, by settling tank (18), anti-return device (19), entrance (20), feed pipe (21), cover plate (22), overflow pipe (23), cylindrical shell (24), cone (25), underflow pipe (26), valve (27) and spiral clinker pusher structure form, it is characterized in that: the entrance of hydrocyclone (20) is designed to three entrance structures, described entrance (20) adopts the long and narrow gradual change rectangle feed pipe (21) of three identical cross-sectional shapes, and three entrances (20) are 120 degree and are arranged symmetrically with, the long limit of its rectangle is parallel to hydrocyclone axis, wherein a long limit and cylindrical shell (24) inner surface are tangent, entrance (20) is communicated with cylindrical shell (24) by three feed pipes (21), on three feed pipes (21), be equipped with valve (27), by controlled valve (27), the flow velocity of eddy flow intraluminal fluid stream is control effectively, make it reach the suitable flow velocity of separated solid-liquid, described cylindrical shell (24) eddy flow chamber nominal diameter is set to 400～500mm, can increase its treating capacity to rotary fluid, thereby reduces the usage quantity of cyclone cylindrical shell (24), at underflow opening (26), locate to connect a settling tank (18), in settling tank (18), also install an anti-return device (19) additional, further the solid slag that contains a small amount of liquid phase being flowed down by cylindrical shell (24) is carried out to separation again, prevent the phenomenon of leakage, settling tank (18) connects a cylindrical shape hopper (14) below, one spiral (8) is installed in hopper (14), hopper (14) external application one buncher (1) is by helical axis (7), ceaselessly rotating screw (8) is got rid of solid slag, and the number that can need discharge according to solid slag, by regulating the rotating speed of buncher (1) to change slag dumping speed, thereby realize automatic, continuous, adjustable being excluded of slag of underflow opening (26) deposition.

2. a kind of three entrance spirals according to claim 1 push away slag type hydrocyclone, it is characterized in that: described spiral clinker pusher structure consists of buncher (1), shaft coupling (2), key (3), clutch shaft bearing end cap (4), taper roll bearing (5), packing ring (6), helical axis (7), spiral (8), hopper slag notch (9), bearing block (10), base (11), self-aligning bearing (12), the second bearing (ball) cover (13), hopper (14), hopper slag inlet (15), flange (16), flange cushion film (17).