CN116920451A - Discharging unit of centrifugal extractor and centrifugal extractor - Google Patents

Abstract

The invention belongs to the field of centrifugal extractors, and in particular relates to a discharging unit of a centrifugal extractor and the centrifugal extractor, wherein the discharging unit comprises an axial discharging part, a radial discharging part is arranged above the axial discharging part, a light phase discharging channel and a heavy phase discharging channel are arranged on the radial discharging part, and the bottom ends of the light phase discharging channel and the heavy phase discharging channel are respectively communicated with a light phase upper discharging channel and a heavy phase upper discharging channel; the top end of the light phase discharging channel is provided with an opening or a closed structure, the radial outer side surface of the radial discharging part is provided with a light phase discharging hole, and the outlet end of the light phase discharging hole is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part; the heavy phase discharging channel is provided with an axial extending part and a radial extending part, the radial extending part is connected to the top end of the axial extending part, and an avoidance space for avoiding the radial inner side edge of the radial extending part is arranged right above the light phase upper discharging channel. The technical problems of small application range and larger power consumption of the centrifugal extractor in the prior art can be solved by the scheme.

Description

Discharging unit of centrifugal extractor and centrifugal extractor

Technical Field

The invention belongs to the field of centrifugal extractors, and particularly relates to a discharging unit of a centrifugal extractor and the centrifugal extractor.

Background

The centrifugal extractor generally comprises a shell, wherein a rotary drum is arranged in the shell, after the mixture of light-heavy phase liquids with different densities and mutual incompatibility enters the rotary drum, the liquid with small density in the mixed liquid can be collected in the direction close to a rotating shaft under the action of centrifugal force along with the rotation of the rotary drum, and the liquid with large density can be collected in the direction far away from the rotating shaft, so that the separation of the light-heavy phase liquids is realized. The device is widely applied in the fields of petrochemical industry, food processing, medicine, biological engineering, hydrometallurgy and the like due to the characteristics of high automation level, compact structure, small volume, high separation efficiency, strong continuous operation capability and the like. When the rotary drum of the centrifugal extractor rotates, the centrifugal force applied to the light and heavy phase liquid in the centrifugal extractor is tens of times or hundreds of times different from the gravity in the vertical direction, the gravity of the liquid in the rotary drum can be ignored, and the gravity direction of the liquid in the rotary drum can be considered to be towards the radial outer side of the rotary drum.

The design form of the light-heavy communication channel of the centrifugal extractor in the market at present is shown in fig. 1: a drainage tube 2 is arranged in the rotary drum 1, and a light phase discharging channel 3 extending along the up-down direction is formed in the radial inner space of the drainage tube 2 for discharging light phase liquid 5 upwards into a corresponding light phase collecting cavity; the bottom end of the drainage tube 2 is provided with an annular baffle 22, and the annular baffle 22 extends to the radial outer side of the drainage tube 2 so as to form a heavy phase discharging channel 4 with an L-shaped section between the drainage tube 2 and the inner wall surface of the rotary drum for discharging the heavy phase liquid 6 out of the rotary drum 1. The light phase discharging channel 3 with the design form is close to the center of the rotating shaft 7, the rotating radius is minimum, the centrifugal force generated by the light phase liquid 5 is minimum in acting on the rotary drum 1, and the stability of the centrifugal machine in operation and the lower power consumption of the rotary drum can be ensured. However, when the density difference between the light and heavy phase liquids in the mixed liquid is small, it is necessary to design the heavy phase discharge channel 4 close to the rotation shaft 7 so that the heavy phase discharge channel 4 is close to the light phase discharge channel 3 in the radial dimension, and the heavy phase discharge channel 4 cannot be infinitely accessed in the radial direction because the draft tube 2 is located between the heavy phase discharge channel 4 and the light phase discharge channel 3 and has a certain thickness. Therefore, the centrifugal extractor with the design form cannot be suitable for the condition of small density difference of two-phase liquid, and has a small application range. The design form can refer to a centrifugal extractor light phase axial discharging structure disclosed in patent document CN 206688275U.

The design form of the light-heavy communication channel of the centrifugal extractor in the market is shown in fig. 2: a radial direction of the rotary drum 1 is perforated or fanned to form a light phase discharge channel 3, the light phase liquid 5 is discharged from the innermost liquid level inside the rotary drum 1 to the rotary drum 1 in a centrifugal acceleration mode, and the heavy phase liquid 6 is discharged from a heavy phase discharge channel 4 above the light phase discharge channel 3 on the rotary drum 1. The design form can lead the discharge liquid level of the light phase to approach infinitely in the radial direction, thereby improving the application range of the centrifugal extractor. However, when the light phase liquid 5 is discharged, the light phase liquid needs to pass through the rotary drum 1, and the rotary drum 1 continuously accelerates the liquid in the process of discharging the liquid from the rotary drum 1, so that the power consumption output of the rotary drum 1 to the clarified liquid is caused, the additional power consumption is increased, and the power consumption of the centrifugal extractor is larger; and because the speed of the light phase liquid 5 is higher at the tail end of the light phase discharging channel 3, the possibility of atomization is higher when the light phase liquid is discharged from the rotary drum 1, and part of atomized liquid can escape to the heavy phase discharging channel 4, so that the light phase liquid is entrained in the heavy phase liquid discharged from the rotary drum 1, and the centrifugal extraction effect is poor. The design form can refer to an upper suspension type low-power consumption weak shear type liquid-liquid centrifugal extractor disclosed in patent document CN 109011691A.

The two discharging modes in the prior art can not simultaneously meet the two requirements of small density difference of light-heavy phase feed liquid and low operation power consumption.

Disclosure of Invention

The invention aims to provide a discharging unit of a centrifugal extractor, which aims to solve the technical problems of small application range and large power consumption of the centrifugal extractor in the prior art. The invention also provides a centrifugal extractor for solving the problems.

In order to achieve the above purpose, the technical scheme of the discharging unit of the centrifugal extractor provided by the invention is as follows: the discharging unit of the centrifugal extraction machine is coaxially arranged at the top of the rotary drum, and comprises an axial discharging part which is arranged at the top end of the rotary drum, wherein a light phase upper discharging channel which extends along the up-down direction and a heavy phase upper discharging channel which is positioned at the radial outer side of the light phase upper discharging channel are arranged on the axial discharging part, a radial discharging part is arranged above the axial discharging part, a light phase discharging channel and a heavy phase discharging channel are arranged on the radial discharging part, the bottom end of the heavy phase discharging channel is communicated with the heavy phase upper discharging channel, and the bottom end of the light phase discharging channel is communicated with the light phase upper discharging channel; the top end of the light phase discharging channel is provided with an opening or a closed structure, the radial outer side surface of the radial discharging part is provided with a light phase discharging hole communicated with the light phase discharging channel and used for discharging light phase liquid out of the discharging unit, and the outlet end of the light phase discharging hole is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part; the heavy phase discharging channel is provided with an axial extending part and a radial extending part, the radial extending part is connected to the top end of the axial extending part, and an avoidance space for avoiding the radial inner edge of the radial extending part is arranged right above the wall body at the outer side of the light phase upper row channel.

The beneficial effects are that: according to the discharging unit of the centrifugal extractor, the light phase upper discharging channel at the inner side of the annular wall is communicated with the light phase discharging channel, and the heavy phase upper discharging channel of the heavy phase upper discharging channel at the outer side of the annular wall is communicated with the heavy phase discharging channel, so that light phase liquid and heavy phase liquid can be conveniently discharged out of the discharging unit respectively; the outlet end of the light phase discharging hole is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part, so that the radial size of the light phase discharging hole is reduced, the rotary drum of the centrifugal extractor is prevented from applying additional work to the clarified light phase liquid, and the power consumption of the centrifugal extractor is reduced; meanwhile, due to the arrangement of the avoidance space, a part of the radial extension part of the heavy phase discharging channel can be overlapped with the light phase discharging channel in the radial direction, so that the light phase liquid and the heavy phase liquid can be more approximate in the radial direction, the boundary of the light phase and heavy phase mixed liquid in the rotary drum is further away from the heavy phase upper discharging channel, the light phase liquid is prevented from entering the heavy phase discharging channel, and further the entrainment of the light phase liquid in the clarified heavy phase liquid is reduced.

As a further improvement, the top of the radial discharge portion is provided with a radial slot communicating with the top end of the axial extension of the heavy phase discharge channel, and the discharge unit further comprises a heavy phase weir plate for being detachably capped on the radial slot to form the radial extension together with the radial slot, the radially inner edge of the heavy phase weir plate being located directly above the wall outside the light phase upper discharge channel.

The beneficial effects are that: the radial extension part is formed by the heavy phase weir plate which is detachably covered on the radial slot and the radial slot, which is beneficial to simplifying the mechanism of the radial discharging part and facilitating the manufacture.

As a further improvement, the heavy phase weirs are arranged circumferentially in blocks.

The beneficial effects are that: the heavy phase weir plate is arranged in a blocking way, so that the weight of the heavy phase weir plate is reduced on the premise of ensuring that heavy phase liquid can be drained, the power consumption of the centrifugal extractor is reduced, the structure is simplified, and the centrifugal extractor is convenient to manufacture.

As a further improvement, the radial discharging portion is provided separately from the axial discharging portion, and the heavy phase discharging channel and the light phase discharging channel are formed with openings on the bottom surface of the radial discharging portion for communicating with the heavy phase upper discharging channel and the light phase upper discharging channel, respectively.

The beneficial effects are that: the radial discharging part and the axial discharging part are arranged in a split way, so that the ports of the light phase discharging channel and the heavy phase discharging channel are visible, and the manufacturing is convenient.

As a further refinement, the light phase discharge channel is formed by an annular cavity on the radial discharge portion.

The beneficial effects are that: the light phase discharging channel is formed by the annular cavity of the radial discharging part, and has simple structure and convenient manufacture.

As a further improvement, the top end of the wall body at the outer side of the light phase discharging channel is provided with an inner folded edge, and the inner folded edge is folded into the upward opening of the light phase discharging channel.

The beneficial effects are that: the top of the light phase discharging channel is provided with a folding edge, and heavy phase liquid in the heavy phase discharging channel cannot fall into the light phase discharging channel under the high-speed rotation of the rotary drum.

As a further improvement, a ring groove is arranged on the radial inner side surface of the channel wall of the side of the light phase discharging channel far away from the axis of the discharging unit, and the radial inner end of the light phase discharging hole is communicated with the ring groove.

The beneficial effects are that: the ring grooves can buffer the light phase liquid in the light phase discharging channel, so that the light phase liquid can flow into the light phase discharging holes conveniently.

As a further improvement, the inner wall surface of the light phase discharging hole is a curved surface in the circumferential direction.

The beneficial effects are that: the inner wall surface of the light phase discharging hole is a curved surface, so that the impact of the light phase discharging hole on light phase liquid is reduced, and the splashing phenomenon of the liquid discharged by the light phase discharging hole is avoided.

As a further improvement, the part of the radial discharging part corresponding to the light phase discharging hole is a small diameter part, and the outer diameter of the small diameter part is smaller than the diameter of the adjacent part.

The beneficial effects are that: the diameter of the small-diameter part is smaller, so that the radial dimension of the light phase discharge hole is further reduced, the rotary drum is better prevented from doing more extra work on the light phase liquid in the light phase discharge hole, and the power consumption of the centrifugal extractor is further reduced.

The technical scheme of the centrifugal extractor provided by the invention is as follows: the centrifugal extraction machine comprises a shell, wherein a rotating shaft is arranged on the shell, a rotary drum is fixed on the rotating shaft, a discharging unit for discharging light phase liquid and heavy phase liquid in the rotary drum is coaxially arranged at the top end of the rotary drum, the discharging unit comprises an axial discharging part which is arranged at the top end of the rotary drum, a light phase upper discharging channel extending along the up-down direction and a heavy phase upper discharging channel positioned at the radial outer side of the light phase upper discharging channel are arranged on the axial discharging part, a radial discharging part is arranged above the axial discharging part, a light phase discharging channel and a heavy phase discharging channel are arranged on the radial discharging part, the bottom end of the heavy phase discharging channel is communicated with the heavy phase upper discharging channel, and the bottom end of the light phase discharging channel is communicated with the light phase upper discharging channel; the top end of the light phase discharging channel is provided with an opening or a closed structure, the radial outer side surface of the radial discharging part is provided with a light phase discharging hole communicated with the light phase discharging channel and used for discharging light phase liquid out of the discharging unit, and the outlet end of the light phase discharging hole is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part; the heavy phase discharging channel is provided with an axial extending part and a radial extending part, the radial extending part is connected to the top end of the axial extending part, and an avoidance space for avoiding the radial inner edge of the radial extending part is arranged right above the wall body at the outer side of the light phase upper row channel.

The beneficial effects are that: according to the centrifugal extractor provided by the invention, the light phase upper discharge channel at the inner side of the annular wall is communicated with the light phase discharge channel, and the heavy phase upper discharge channel of the heavy phase upper discharge channel at the outer side of the annular wall is communicated with the heavy phase discharge channel, so that light phase liquid and heavy phase liquid can be conveniently discharged out of the discharge unit respectively; the outlet end of the light phase discharging hole is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part, so that the radial size of the light phase discharging hole is reduced, the rotary drum of the centrifugal extractor is prevented from applying additional work to the clarified light phase liquid, and the power consumption of the centrifugal extractor is reduced; the radial extension part of the heavy phase discharging channel is overlapped with the light phase discharging channel in the radial direction, which is beneficial to enabling the light phase liquid and the heavy phase liquid to be infinitely close in the radial direction, is also beneficial to enabling the boundary line of the light phase and heavy phase mixed liquid in the rotary drum to be far away from the upper discharging channel of the heavy phase, avoids the light phase liquid from entering the heavy phase discharging channel, is further beneficial to reducing the entrainment of the light phase liquid in the clarified heavy phase liquid, and compared with the centrifugal extractor in the prior art, the centrifugal extractor is characterized in that the light phase liquid and the heavy phase liquid are independently separated by the light phase liquid in the radial direction of the rotary drum or by the drainage tube, and the power consumption of the centrifugal extractor is also reduced on the premise that the light phase liquid and the heavy phase liquid in the centrifugal extractor are infinitely close in the radial direction.

As a further improvement, the top of the radial discharge portion is provided with a radial slot communicating with the top end of the axial extension of the heavy phase discharge channel, and the discharge unit further comprises a heavy phase weir plate for being detachably capped on the radial slot to form the radial extension together with the radial slot, the radially inner edge of the heavy phase weir plate being located directly above the wall outside the light phase upper discharge channel.

The beneficial effects are that: the radial extension part is formed by the heavy phase weir plate which is detachably covered on the radial slot and the radial slot, which is beneficial to simplifying the mechanism of the radial discharging part and facilitating the manufacture.

As a further improvement, the heavy phase weirs are arranged circumferentially in blocks.

The beneficial effects are that: the heavy phase weir plate is arranged in a blocking way, so that the weight of the heavy phase weir plate is reduced on the premise of ensuring that heavy phase liquid can be drained, the power consumption of the centrifugal extractor is reduced, the structure is simplified, and the centrifugal extractor is convenient to manufacture.

As a further improvement, the radial discharging portion is provided separately from the axial discharging portion, and the heavy phase discharging channel and the light phase discharging channel are formed with openings on the bottom surface of the radial discharging portion for communicating with the heavy phase upper discharging channel and the light phase upper discharging channel, respectively.

The beneficial effects are that: the radial discharging part and the axial discharging part are arranged in a split way, so that the ports of the light phase discharging channel and the heavy phase discharging channel are visible, and the manufacturing is convenient.

As a further refinement, the light phase discharge channel is formed by an annular cavity on the radial discharge portion.

The beneficial effects are that: the light phase discharging channel is formed by the annular cavity of the radial discharging part, and has simple structure and convenient manufacture.

As a further improvement, the top end of the wall body at the outer side of the light phase discharging channel is provided with an inner folded edge, and the inner folded edge is folded into the upward opening of the light phase discharging channel.

The beneficial effects are that: the top of the light phase discharging channel is provided with a folding edge, and heavy phase liquid in the heavy phase discharging channel cannot fall into the light phase discharging channel under the high-speed rotation of the rotary drum.

As a further improvement, a ring groove is arranged on the radial inner side surface of the channel wall of the side of the light phase discharging channel far away from the axis of the discharging unit, and the radial inner end of the light phase discharging hole is communicated with the ring groove.

The beneficial effects are that: the ring grooves can buffer the light phase liquid in the light phase discharging channel, so that the light phase liquid can flow into the light phase discharging holes conveniently.

As a further improvement, the inner wall surface of the light phase discharging hole is a curved surface in the circumferential direction.

The beneficial effects are that: the inner wall surface of the light phase discharging hole is a curved surface, so that the impact of the light phase discharging hole on light phase liquid is reduced, and the splashing phenomenon of the liquid discharged by the light phase discharging hole is avoided.

As a further improvement, the part of the radial discharging part corresponding to the light phase discharging hole is a small diameter part, and the outer diameter of the small diameter part is smaller than the diameter of the adjacent part.

The beneficial effects are that: the diameter of the small-diameter part is smaller, so that the radial dimension of the light phase discharge hole is further reduced, the rotary drum is better prevented from doing more extra work on the light phase liquid in the light phase discharge hole, and the power consumption of the centrifugal extractor is further reduced.

Drawings

FIG. 1 is a schematic view of a light-heavy phase channel arrangement of a centrifugal extractor according to the prior art;

FIG. 2 is a schematic diagram of a light-heavy phase channel arrangement of a centrifugal extractor according to the prior art;

fig. 3 is a schematic structural view of an embodiment 1 of a centrifugal extractor provided by the present invention;

FIG. 4 is a schematic view of the discharging unit in FIG. 3;

FIG. 5 is a top view of the radial outfeed section of FIG. 4;

FIG. 6 is a bottom view of the radial outfeed section of FIG. 4;

fig. 7 is a schematic structural diagram of an embodiment 2 of a centrifugal extractor provided by the present invention;

fig. 8 is a schematic structural view of an embodiment 3 of a centrifugal extractor according to the present invention;

fig. 9 is a schematic structural view of an embodiment 4 of a centrifugal extractor provided by the present invention;

fig. 10 is a schematic structural diagram of an embodiment 5 of a centrifugal extractor provided by the present invention.

Reference numerals illustrate: 1. a rotating drum; 2. a drainage tube; 3. a light phase discharge channel; 4. a heavy phase discharge channel; 5. a light phase liquid; 6. a heavy phase liquid; 7. a rotating shaft; 8. a housing; 9. a mixing chamber; 10. a feed terminal; 11. a driving motor; 12. a light phase inlet; 13. a light phase collection chamber; 14. a heavy phase outlet; 15. a heavy phase inlet; 16. a light phase outlet; 17. a heavy phase collection chamber; 18. a first central cylinder; 19. a circumferential side wall; 20. a top wall; 21. a light phase upper row channel; 22. an annular baffle; 23. a heavy phase upper discharge channel; 24. a first rib plate; 25. an annular wall; 26. a second central cylinder; 27. a radial sidewall; 28. a heavy phase weir plate; 29. an axially extending portion; 30. a radially extending portion; 31. a collection chamber cover plate; 32. a seal ring; 33. a blocking wall; 34. a lateral portion; 35. a vertical portion; 36. a third rib plate; 37. a discharging unit; 38. a radial discharging part; 39. an axial discharge portion; 40. a heavy phase discharge port; 41. a light phase discharge hole; 42. and a ring groove.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.

It should be noted that in the present embodiment, relational terms such as "first" and "second" and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprising one … …" or the like, as may occur, does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the depicted element.

In the description of the present invention, unless explicitly stated and limited otherwise, terms such as "mounted," "connected," and "connected" may be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.

In the description of the present invention, unless explicitly stated and limited otherwise, the term "provided" as may occur, for example, as an object of "provided" may be a part of a body, may be separately arranged from the body, and may be connected to the body, and may be detachably connected or may be non-detachably connected. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.

The present invention is described in further detail below with reference to examples.

Example 1 of the centrifugal extractor provided in the present invention:

as shown in fig. 3, the centrifugal extractor comprises a casing 8, a driving motor 11 is arranged above the outside of the casing 8, an inner cavity is formed in the casing 8, a rotating shaft 7 is arranged in the inner cavity, a rotary drum 1 is sleeved on the rotating shaft 7, a discharging unit 37 is arranged at the top end of the rotary drum 1, a light phase inlet 12 and a heavy phase inlet 15 are arranged on the peripheral side surface of the casing 8, light phase liquid and heavy phase liquid to be extracted enter the inner cavity of the casing 8 through the light phase inlet 12 and the heavy phase inlet 15 respectively, a mixing chamber 9 is arranged below the outside of the casing 8 and used for mixing light phase liquid and heavy phase liquid mixed liquid entering the casing 8, when the driving motor 11 drives the rotating shaft 7 to rotate, the rotating shaft 7 drives the rotary drum 1 to rotate, so that mixed liquid in the inner cavity enters the rotary drum 1 through a feeding terminal 10 at the bottom end of the rotary drum 1, the mixed liquid is gradually separated in the rotary drum 1, and the mixed liquid is discharged out of the rotary drum 1 through the discharging unit 37. The assembly of the casing 8, the driving motor 11, the shaft 7 and the casing 8 of the centrifugal extractor and the mixing chamber 9 are all of the prior art, and will not be described here again.

As shown in fig. 4, the discharging unit 37 includes an axial discharging portion 39 and a radial discharging portion 38, and the radial discharging portion 38 is disposed above the axial discharging portion 39.

The axial discharging portion 39 includes a first center tube 18, and a key groove is provided on an inner peripheral surface of the first center tube 18 for key-connection with the rotary shaft 7. The first central cylinder 18 is provided radially outside with a circumferential side wall 19, the top end of the circumferential side wall 19 being provided with a top wall 20. An annular wall 25 is arranged between the radial outer side of the first central cylinder 18 and the circumferential side wall 19, the annular wall 25 is of a cylindrical structure, the inner circumferential surface of the annular wall 25 and the outer side surface of the first central cylinder 18 are fixed through a plurality of first rib plates 24 which are arranged at intervals, the annular space between the radial inner side of the annular wall 25 and the radial outer side of the first central cylinder 18 is divided into a plurality of vertical through holes by each first rib plate 24 to form a plurality of light phase upper discharge channels 21, and the top ends of the light phase upper discharge channels 21 form light phase upper discharge openings for discharging the light phase liquid 5 in the rotary drum 1 into a radial discharge part 38.

The bottom end of the annular wall 25 is provided with an annular baffle 22 extending in the radial direction of the first central cylinder 18, the radially inner end of the annular baffle 22 is connected to the annular wall 25, the radially outer end of the annular baffle 22 is overhanging, and the heavy phase liquid 6 enters the axial discharge portion 39 from the space between the overhanging radially outer end and the circumferential side wall 19. The radial outer side of the annular wall 25 is provided with second rib plates corresponding to the first rib plates 24, the radial inner ends of the second rib plates are connected to the annular wall 25, the radial outer ends of the second rib plates are connected to the inner side surface of the circumferential side wall 19, the top ends of the second rib plates are connected to the inner side surface of the top wall 20, the bottom ends of the second inlet rib plates are connected to the annular baffle 22, the annular wall 25, the second rib plates and the radial inner side of the rotary drum 1 form an annular channel with an L-shaped axial section, so that a plurality of heavy phase upper discharge channels 23 are formed, and a heavy phase upper discharge port is formed between the radial outer side of the top end of the annular wall 25 and the radial inner end of the top wall 20 and used for discharging heavy phase liquid 6 in the rotary drum 1 into the radial discharge part 38.

The radial discharge portion 38 includes a second central barrel 26, and the inner side of the second central barrel 26 is also splined for keyed connection with the spindle 7. The radial outer side of the second central cylinder 26 is provided with an annular radial side wall 27, the radial side wall 27 is connected with the second central cylinder 26 through a plurality of third rib plates 36, and the third rib plates 36 are uniformly distributed along the circumferential direction of the second central cylinder 26 at intervals so as to form a plurality of fan-shaped channels in the circumferential space between the radial side wall 27 and the second central cylinder 26, and the lower port of each fan-shaped channel is respectively communicated with each light phase upper discharge port and each heavy phase upper discharge port on the circumferential discharging part. The radial outfeed section 38 in fig. 4 may be considered as a cross-sectional view in the direction A-A in fig. 5.

As shown in fig. 5 and 6, a blocking wall 33 is provided between the second central cylinder 26 and the radial side wall 27, and the blocking wall 33 has a cylindrical structure. Each third web 36 is L-shaped and includes a transverse portion 34 and a vertical portion 35. The blocking wall 33 is annular and is connected radially inside the vertical portion 35 to divide each sector channel radially outside the second central cylinder 26 into two parts.

Wherein the part between the radial inner side of the blocking wall 33 and the second central cylinder 26 forms a light phase discharging channel 3, an inner folded edge 43 is arranged on the wall body at the outer side of the top end of the light phase discharging channel 3, and the inner folded edge 43 is folded into an upward opening of the light phase discharging channel 3. The radially inner side of the channel wall of the light phase discharge channel 3, which is remote from the drum, is provided with a ring groove 42. A radially extending light phase discharge hole 41 is provided in the vertical portion 35 of each third rib plate 36, the inner end of the light phase discharge hole 41 communicates with the light phase discharge channel 3 via a ring groove 42, and the outer end opening of the light phase discharge hole 41 is provided in the radial side wall 27 for discharging the light phase liquid 5 in the radial discharge portion 38 out of the discharge unit 37. A collecting cavity cover plate 31 is arranged between the rotary drum 1 and the shell 8, the collecting cavity cover plate 31, the rotary drum 1 and the shell 8 enclose a light phase collecting cavity 13, a light phase outlet 16 is arranged on the shell 8 at the position of the light phase collecting cavity 13, and the light phase liquid 5 discharged by the discharging unit 37 is discharged from the light phase outlet 16 through the light phase collecting cavity 13 to the centrifugal extractor.

The portion between the radially inner side and the radial side wall of the blocking wall 33 penetrates up and down to form an axially extending portion 29 for upper discharge of the heavy phase liquid 6 from the heavy phase upper discharge passage 23 into the radial discharge portion 38. The top end of the radial sidewall 27 is provided with an everting edge extending away from the second central cylinder 26, and the everting edge is provided with a bolt mounting hole. A plurality of heavy phase weirs 28 are arranged above the everting edges, each heavy phase weir 28 being fan-shaped and each having a connecting hole for bolting to the everting edge, and a cover forming a radial extension 30 at the top end of the axial extension 29. The axial extension 29 communicates with the radial extension 30 to form a heavy phase discharge channel 4, a heavy phase discharge opening 40 is formed between the radially inner end of the heavy phase weir plate 28 and the second central cylinder 26 for discharging the heavy phase liquid 6 in the radial discharge portion 38 out of the discharge unit 37, a heavy phase collecting chamber 17 is arranged between the drum 1 and the housing 8, a heavy phase outlet 14 is arranged on the housing 8 and at the position of the heavy phase collecting chamber 17, and the heavy phase liquid 6 discharged by the discharge unit 37 is discharged from the heavy phase outlet 14 through the heavy phase collecting chamber 17 out of the centrifugal extractor.

Since the centrifugal extractor operates on the principle that the liquid entering the drum 1 is centrifugally extracted, when the drum 1 rotates, the centrifugal force applied to the liquid can be equivalent to the gravity force with the direction consistent with the radial direction of the drum 1, and then the discharging unit 37 can be regarded as a communicating vessel, and the position of the interface between the two liquids with different densities in the communicating vessel can be influenced by the height of the communicating vessel. In order to avoid that the parting line of the light phase liquid 5 and the heavy phase liquid 6 in the drum 1 is too close to the radially outer end of the annular baffle 22, the light phase liquid 5 is caused to enter the heavy phase upper discharge channel 23. The radial dimension of each heavy phase weir plate 28 is increased so that the radial inner end of each heavy phase weir plate 28 is closer to the axis of the rotating shaft 7 than the radial inner end of the annular baffle plate 22, on the one hand, the boundary line of the two-phase liquid can be offset towards the radial inner end of the annular baffle plate 22, and on the other hand, the centrifugal extractor can be suitable for the light-phase liquid 5 and the heavy-phase liquid 6 to be extracted, which have the densities more approximate.

In order to realize the sealing connection between the radial discharging part 38 and the axial discharging part 39, sealing grooves are arranged at the bottom ends of the plugging wall 33 and the radial side wall 27 of the radial discharging part 38, and when in installation, sealing rings 32 are arranged in the sealing grooves to press the radial discharging part 38 above the axial discharging part 39, and then the radial discharging part 38 is tightly pressed above the axial discharging part 39 through a press-fit structure sleeved on the rotating shaft 7, so that the installation of the discharging unit 37 is realized.

When extracting the liquid to be extracted, firstly, the light phase liquid 5 to be extracted enters the inner cavity of the shell 8 from the light phase inlet 12, the heavy phase liquid 6 enters the inner cavity of the shell 8 from the heavy phase inlet 15, the rotating shaft 7 is started, the light phase liquid 5 to be extracted and the heavy phase liquid 6 entering the inner cavity can enter the mixing chamber 9 for mixing, when the rotating drum 1 rotates, the mixed liquid formed by the light phase liquid 5 to be extracted and the heavy phase liquid 6 enters the rotating drum 1 through the feeding terminal 10 at the bottom end of the rotating drum 1, the mixed liquid in the rotating drum 1 can be gradually separated into the extracted light phase liquid 5 and the heavy phase liquid 6 under the centrifugal action, and in the process of continuously feeding the materials into the inner cavity of the shell 8, the light phase liquid 5 in the rotating drum 1 can be sequentially discharged out of the shell 8 through the light phase upper discharging channel 21, the light phase discharging channel 3 and the light phase discharging hole 41, and then enters the light phase collecting cavity 13, and is discharged out of the shell 8 through the light phase outlet 16 on the shell 8; the heavy phase liquid 6 is discharged from the heavy phase upper discharge channel 23, the heavy phase discharge channel 4 and the heavy phase discharge port 40 in sequence, enters the heavy phase collecting cavity 17, and is discharged from the shell 8 through the heavy phase outlet 14 on the shell 8, thus completing the extraction of the two-phase liquid.

According to the centrifugal extractor provided by the invention, the light phase upper discharge channel 21 at the inner side of the annular wall 25 is communicated with the light phase discharge channel 3, and the heavy phase upper discharge channel of the heavy phase upper discharge channel 23 at the outer side of the annular wall 25 is communicated with the heavy phase discharge channel 4, so that the light phase liquid 5 and the heavy phase liquid 6 can be conveniently discharged out of the discharge unit respectively; the outlet end of the light phase discharging hole 41 is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part 39, which is beneficial to reducing the radial size of the light phase discharging hole 41, avoiding the rotary drum 1 of the centrifugal extractor from applying additional work to the clarified light phase liquid 5, and further being beneficial to reducing the power consumption of the centrifugal extractor; the radial extension 30 of the heavy phase discharging channel 4 is partially overlapped with the light phase discharging channel 3 in radial direction, which is beneficial to enabling the light phase liquid 5 and the heavy phase liquid 6 to be infinitely close in radial direction, is also beneficial to enabling the boundary line of the light phase and heavy phase mixed liquid in the rotary drum 1 to be far away from the heavy phase upper discharging channel 23, prevents the light phase liquid 5 from entering the heavy phase discharging channel 4, is further beneficial to reducing the entrainment of the light phase liquid in the clarified heavy phase liquid, and compared with the centrifugal extractor in the prior art, the centrifugal extractor is characterized in that the light phase liquid and the heavy phase liquid in radial direction of the rotary drum are singly adopted or separated by the drainage tube, and the power consumption of the centrifugal extractor is also reduced on the premise that the light phase liquid and the heavy phase liquid in the centrifugal extractor are infinitely close in radial direction.

Example 2 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 1 in that: in embodiment 1, the radial side wall 27 of the radial discharging portion 38 is provided with the light phase discharging channel 3, and the top end of the radial side wall 27 is provided with the everting edge. In this embodiment, as shown in fig. 7, the radial dimension of the radial sidewall 27 may be increased, so that the radial sidewall 27 is cylindrical as a whole, and the radial dimension of the light phase discharging channel 3 is correspondingly increased.

Example 3 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 1 in that: in embodiment 1, the upper part of the light phase discharging channel 3 is an opening. In this embodiment, as shown in fig. 8, a sealing plate is disposed above the light phase discharging channel 3.

Example 4 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 1 in that: in embodiment 1, the upper end of the rotating shaft 7 is fixed in driving connection with the driving motor 11, and the lower end of the rotating shaft 7 is cantilevered. In the present embodiment, as shown in fig. 9, a lower bearing chamber 42 is provided below the mixing chamber 11, and the lower end of the rotation shaft 7 is rotatably fitted in the lower bearing chamber 42.

Example 5 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 7 in that: in embodiment 7, the housing 8 is supported on the corresponding table by the legs 41. In this embodiment, as shown in fig. 10, the support legs 41 are not provided under the housing 8, the support frame 43 is provided on the outer peripheral side of the housing 8, the peripheral side of the drum 7 is fixedly connected to the housing 8, and the housing 8 is mounted on the support frame 43.

Example 6 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 1 in that: in embodiment 1, the heavy phase discharge channels 4 and the light phase discharge channels 3 are staggered in the circumferential direction of the discharge unit 37. In the present embodiment, the heavy phase discharge channels 4 and the light phase discharge channels 3 are staggered in the axial direction of the discharge unit 37. Specifically, the plugging wall 33 of the radial discharging portion 38 is a ring cylinder, a light phase discharging channel extending along the axial direction of the second central cylinder 26 is formed between the radial inner side of the plugging wall 33 and the second central cylinder 26, the top end of the light phase discharging channel is closed, and the bottom end of the light phase discharging channel is communicated with the light phase upper discharge port; the space between the radial outer side of the plugging wall 33 and the radial side wall 27 forms an annular channel, the bottom end of the annular channel is communicated with the heavy phase upper discharge port, the top end of the annular channel is provided with a heavy phase weir plate 28 to form a heavy phase discharge channel, wherein the space between the heavy phase weir plate 28 and the closed structure at the top end of the light phase discharge channel forms a radial extension part of the heavy phase discharge channel, the space between the plugging wall 33 and the radial side wall 27 forms an axial extension part of the heavy phase discharge channel 4, and the axial extension part is positioned at the radial outer side of the light phase discharge channel.

Example 7 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 1 in that: in embodiment 1, the light phase discharging channel 3 is a plurality of fan-shaped channels surrounded by a plurality of third rib plates 36 and plugging walls 33 arranged at intervals and the second central cylinder 26. In this embodiment, the radial dimension of the third rib plate 36 is reduced, the radial outer end of the third rib plate 36 is connected with the radial side wall 27, and the radial inner end of the third rib plate 36 is connected with the outer side surface of the plugging wall 33, so that an annular cavity is formed between the plugging wall 33 and the second central cylinder 26, the top end of the annular cavity is closed, and the bottom end of the annular cavity is communicated with the light phase upper discharge port to form the light phase discharge channel 3.

Example 8 of the centrifugal extractor provided in the present invention:

this embodiment differs from embodiment 1 in that: in embodiment 1, the heavy phase weir plates 28 are sector plates arranged in blocks, and a plurality of heavy phase weir plates 28 cover the top ends of the axial discharge portions 39 of the heavy phase discharge passages 4. In the present embodiment, the heavy phase weir plate 28 is an integrally designed annular plate, and the annular plate is provided with connecting holes along the circumferential direction of the annular plate so as to be connected with the everting edges of the plugging walls 33 by bolts.

Example 1 of the discharge unit of the centrifugal extractor of the present invention:

the structure of the discharging unit of the centrifugal extractor in this embodiment is the same as that of the discharging unit 37 in the above-described embodiment 1 of the centrifugal extractor, and will not be described here again.

Of course, in other embodiments, the discharging unit of the centrifugal extractor may also be the structure of the discharging unit 37 in any of embodiments 2 to 8 of the centrifugal extractor, which is not described herein.

The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The discharge unit of the centrifugal extractor is used for being coaxially arranged at the top of the rotary drum (1), the discharge unit (37) comprises an axial discharge part (39) which is arranged at the top end of the rotary drum (1), a light phase upper discharge channel (21) which extends along the up-down direction and a heavy phase upper discharge channel (23) which is positioned at the radial outer side of the light phase upper discharge channel (21) are arranged on the axial discharge part (39), and the centrifugal extractor is characterized in that a radial discharge part (38) is arranged above the axial discharge part (39), a light phase discharge channel (3) and a heavy phase discharge channel (4) are arranged on the radial discharge part (38), the bottom end of the heavy phase discharge channel (4) is communicated with the heavy phase upper discharge channel (23), and the bottom end of the light phase discharge channel (3) is communicated with the light phase upper discharge channel (21); the top end of the light phase discharging channel (3) is provided with an opening or is of a closed structure, the radial outer side surface of the radial discharging part (38) is provided with a light phase discharging hole (41) communicated with the light phase discharging channel (3) and used for discharging the light phase liquid (5) out of the discharging unit (37), and the outlet end of the light phase discharging hole (41) is closer to the axis of the discharging unit than the outer peripheral surface of the axial discharging part (39); the heavy phase discharging channel (4) is provided with an axial extending part (29) and a radial extending part (30), the radial extending part (30) is connected to the top end of the axial extending part (29), and an avoidance space for avoiding the radial inner edge of the radial extending part (30) is arranged right above the wall body outside the light phase upper discharging channel (21).

2. Discharge unit of a centrifugal extractor according to claim 1, characterized in that the top of the radial discharge portion (38) is provided with a radial slot communicating with the top end of the axial extension (29) of the heavy phase discharge channel (4), the discharge unit (37) further comprising a heavy phase weir plate (28) for being detachably capped on the radial slot to form the radial extension (30) together with the radial slot, the radially inner edge of the heavy phase weir plate (28) being located directly above the wall outside the light phase upper discharge channel (21).

3. Discharge unit of a centrifugal extractor according to claim 2, wherein the heavy phase weirs (28) are arranged in blocks in the circumferential direction.

4. A discharge unit of a centrifugal extractor according to claim 1 or 2 or 3, characterized in that the radial discharge portion (38) is provided separately from the axial discharge portion (39), the heavy phase discharge channel (4) and the light phase discharge channel (3) forming openings on the bottom surface of the radial discharge portion (38) for communication with the heavy phase upper discharge channel (23) and the light phase upper discharge channel (21), respectively.

5. A discharge unit of a centrifugal extractor according to claim 1 or 2 or 3, characterized in that the light phase discharge channel (3) is formed by an annular cavity on a radial discharge portion (38).

6. The discharge unit of a centrifugal extractor according to claim 5, characterized in that the top end of the wall outside the light phase discharge channel (3) is provided with an inner flange (43), the inner flange (43) being folded into the upward opening of the light phase discharge channel (3).

7. The discharge unit of a centrifugal extractor according to claim 5, characterized in that the radially inner side of the channel wall of the side of the light phase discharge channel (3) remote from the axis of the discharge unit (37) is provided with a ring groove (42), the radially inner end of the light phase discharge hole (41) being in communication with the ring groove (42).

8. A discharge unit of a centrifugal extractor according to claim 1 or 2 or 3, wherein the inner wall surface of the light phase discharge hole (41) is a curved surface in the circumferential direction.

9. A discharge unit of a centrifugal extractor according to claim 1, 2 or 3, characterized in that the portion of the radial discharge portion (38) corresponding to the light phase discharge hole (41) is a small diameter portion, the outer diameter of which is smaller than the diameter of the adjacent portion.

10. Centrifugal extractor, comprising a housing (8), wherein a rotating shaft (7) is arranged on the housing (8), a rotary drum (1) is fixed on the rotating shaft (7), and a discharging unit (37) for discharging light phase liquid (5) and heavy phase liquid (6) in the rotary drum (1) is arranged at the top end of the rotary drum (1), characterized in that the discharging unit is a discharging unit of the centrifugal extractor according to any one of claims 1 to 9.