CN116651015A - Centrifugal extraction machine and centrifugal extraction system comprising same - Google Patents
Centrifugal extraction machine and centrifugal extraction system comprising same Download PDFInfo
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- CN116651015A CN116651015A CN202310629274.6A CN202310629274A CN116651015A CN 116651015 A CN116651015 A CN 116651015A CN 202310629274 A CN202310629274 A CN 202310629274A CN 116651015 A CN116651015 A CN 116651015A
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- 238000000605 extraction Methods 0.000 title claims abstract description 38
- 239000000725 suspension Substances 0.000 claims abstract description 77
- 238000006073 displacement reaction Methods 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000011257 shell material Substances 0.000 description 52
- 239000012071 phase Substances 0.000 description 34
- 239000007788 liquid Substances 0.000 description 12
- 239000002994 raw material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000463219 Epitheca Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000622 liquid--liquid extraction Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0476—Moving receptacles, e.g. rotating receptacles
- B01D11/048—Mixing by counter-current streams provoked by centrifugal force, in rotating coils or in other rotating spaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0484—Controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0488—Flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/10—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention provides a centrifugal extractor and a centrifugal extraction system comprising the same, wherein the centrifugal extractor comprises a shell, a rotary drum and a centrifugal shaft, the shell is arranged outside the rotary drum, and the centrifugal shaft is fixedly connected with the rotary drum; the centrifugal extraction machine also comprises a magnetic suspension bearing, wherein the magnetic suspension bearing comprises a first radial magnetic suspension bearing, is arranged at the upper part of the shell and is positioned at the upper part of the rotary drum; the magnetic suspension bearing also comprises a second radial magnetic suspension bearing which is arranged at the lower end of the shell and is positioned at the lower part of the rotary drum. The centrifugal extraction machine and the centrifugal extraction system comprising the same have compact structure, reduce the volume of equipment, omit a shaft seal and avoid the communication of an internal medium and the external environment; the magnetic suspension bearing applies balanced magnetic force to the eccentric shaft, so that abrasion caused by contact friction is avoided, the running stability of equipment is improved, the service life is prolonged, and the continuous working time of the system is prolonged.
Description
Technical Field
The invention relates to the field of liquid-liquid centrifugal extraction, in particular to a centrifugal extractor and a centrifugal extraction system comprising the same.
Background
The centrifugal extractor is liquid-liquid extraction equipment, has the characteristic of fast mass transfer, can rapidly and efficiently realize liquid-liquid two-phase mixing, mass transfer, extraction, washing, separation and the like, and can greatly shorten the balance time and improve the efficiency; meanwhile, the centrifugal extractor has small demand for organic phase materials and less loss. Centrifugal extractors are widely used in the fields of chemical industry, medicine, petroleum, metallurgy, nuclear energy, wastewater treatment, etc.
In the extraction and separation process of the centrifugal extractor, volatile, inflammable, explosive, toxic and harmful organic solvents are commonly used, and leakage must be strictly prevented, but in some application occasions, leakage of harmful gases is aggravated. For example, the centrifugal extractor is operated continuously for a long period of time, resulting in an increase in the temperature and volatility of the extractant; some special extraction systems must work in an air-insulated environment, requiring inert gas to be introduced and maintaining a certain positive pressure; some extraction systems must operate at high temperatures and pressures to be effective.
For materials with lower single-stage separation coefficient, in order to improve the extraction rate, a plurality of centrifugal extractors must be connected in series, so as to realize accumulation and enrichment. In such a system, an abnormality of one centrifugal extractor breaks the extraction balance of the whole system, affecting the whole extraction and enrichment process.
The conventional centrifugal extractor drive mechanism must be in direct or indirect contact with the shaft system. A mechanical bearing is adopted, a mechanical sealing element is arranged between the driving mechanism and the rotor, a part below the shaft seal is sealed in the equipment shell, and inert gas with certain pressure is introduced into a space below the shaft seal.
This design has the following disadvantages:
(1) The shaft seal and the shell form a pressure boundary of the extraction system together, the shaft seal ensures proper clearance between the dynamic and static parts, prevents gas leakage from the clearance, is difficult to maintain an ideal sealing effect for a long time, and can not realize effective sealing for volatile, inflammable, explosive, toxic and harmful organic extractants, especially micro-positive pressure, high-pressure and high-temperature extraction systems. Forced ventilation facilities are arranged outside the device, so that workplaces and personnel can be protected, the cost caused by solvent and waste gas environmental protection is difficult to avoid, and the device is overlarge in size;
(2) During operation, the pressure in the shell must be properly controlled, leakage is accelerated if the pressure is too high, and isolation of the extraction system from air cannot be ensured if the pressure is too low;
(3) The shaft seal is tightly attached to the shaft, the abrasion is quick, the service life is short, the reliability of equipment is reduced, the continuous operation time of the system is limited, and the process stability is influenced;
(4) The sealing performance of the shaft seal must be monitored in real time during operation, once the shaft seal is found to be invalid, the connection between the failed centrifugal extractor and the system is immediately cut off, the gas pressure in the extractor is removed, the extractant is emptied, and the maintenance cost is high;
in order to popularize and apply the green and stable cascade centrifugal extraction process, it is highly desirable to effectively prevent the volatilization and leakage of the extractant and to prolong the continuous operation time of the centrifugal extractor.
Disclosure of Invention
The invention aims to overcome the defects of large equipment volume, poor sealing, easy abrasion of bearings and short continuous working time of a centrifugal extractor in the prior art, and provides the centrifugal extractor and a centrifugal extraction system comprising the centrifugal extractor.
The invention solves the technical problems by the following technical proposal:
the invention provides a centrifugal extractor, which comprises a shell, a rotary drum and a centrifugal shaft, wherein the shell is arranged outside the rotary drum, the centrifugal shaft is fixedly connected with the rotary drum, and the centrifugal extractor further comprises:
a magnetic suspension bearing for generating magnetic forces in radial and axial directions of the centrifugal shaft and the drum to restrict displacement of the centrifugal shaft and the drum;
the magnetic suspension bearing comprises a first radial magnetic suspension bearing, and the first radial magnetic suspension bearing is used for limiting radial displacement of the upper part of the rotary drum; the first radial magnetic suspension bearing comprises a first stator and a first rotor, the first rotor is arranged on the outer peripheral side of the upper part of the rotary drum, and the first stator is arranged on the upper part of the shell and is correspondingly arranged on the outer peripheral side of the first rotor;
the magnetic suspension bearing further comprises a second radial magnetic suspension bearing, wherein the second radial magnetic suspension bearing is used for limiting radial displacement of the lower part of the rotary drum; the second radial magnetic suspension bearing comprises a second stator and a second rotor, the second rotor is arranged on the outer peripheral side of the lower portion of the rotary drum, and the second stator is arranged on the lower portion of the shell and correspondingly arranged on the outer peripheral side of the second rotor.
In this technical scheme, this centrifugal extractor adopts above-mentioned structure for centrifugal extractor's inside and outside atmosphere keeps apart, avoids extracting the raw materials leakage, restricts the displacement of mandrel and rotary drum and bearing and axle do not produce the contact through magnetic bearing, and is frictionless, is showing and is improving bearing life, has prolonged centrifugal extractor's continuous operating time simultaneously, has increased magnetic bearing's area of stress and the length of significantly reduced axial direction, improves the bearing capacity of rotary drum, has increased stability and load and has reduced equipment volume, makes equipment compact reliable.
Preferably, the centrifugal extractor further comprises a motor, wherein the motor is arranged at the upper part of the shell and is used for driving the centrifugal shaft to rotate; the motor comprises a motor stator and a motor rotor, wherein the motor rotor is arranged on the centrifugal shaft, and the motor stator is arranged on the outer periphery side of the motor rotor. In the technical scheme, the centrifugal shaft is driven to rotate by electromagnetic force generated by electrification between the motor stator and the motor rotor, so that the friction force generated when the mechanical shaft is used for operation in the traditional method is reduced, and the tightness of the equipment is improved by installing the motor in the upper space of the shell.
Preferably, the centrifugal extractor further comprises a magnetic coupling comprising an outer magnet and an inner magnet, wherein the inner magnet is fixed on the centrifugal shaft, the outer magnet is arranged on the outer peripheral side of the inner magnet and is electrically connected with the motor, and the magnetic coupling is used for transmitting torque to the centrifugal shaft to drive the centrifugal shaft to rotate.
In the technical scheme, the motor is not in direct contact with the centrifugal shaft and the rotary drum, and the centrifugal shaft is driven to rotate by transmitting torque in a non-contact manner through the magnetic coupling, so that a sealing device is omitted, the model selection range of the motor is enlarged, and the cost is reduced.
Preferably, the inner magnet is fixedly mounted on an upper outer surface of the off-axis shaft.
In the technical scheme, the area of the inner magnet is larger, so that stable torque transmission is facilitated.
Preferably, the magnetic coupling further comprises a shield disposed between the outer magnet and the inner magnet.
In the technical scheme, the shielding cover separates the outer magnet from the inner magnet, so that raw materials to be extracted are prevented from leaking, and the sealing performance of the equipment is improved.
Preferably, the centrifugal extractor further comprises an upper shell for sealing the first radial magnetic suspension bearing; the magnetic coupling is arranged in the motor base above the shell, and a first sealing ring is arranged between the shielding cover and the upper shell.
In the technical scheme, the first sealing ring isolates the shielding cover from the upper shell and seals the inner cavity, and isolates the internal environment and the external environment of the shielding cover and the upper shell.
Preferably, the magnetic suspension bearing further comprises an axial magnetic suspension bearing, the axial magnetic suspension bearing is arranged outside the shell and above the rotary drum, and the axial magnetic suspension bearing comprises a third stator; the centrifugal shaft is provided with a stress part, and the third stators are arranged on two sides of the stress part and used for limiting the axial displacement of the centrifugal shaft.
In the technical scheme, magnetic force exists between the third stator and the stress part, so that the centrifugal shaft is in a suspension state in the axial direction, and the friction force during operation is greatly reduced.
Preferably, the centrifugal extractor further comprises an upper shell, and the first radial magnetic suspension bearing and the axial magnetic suspension bearing are located in the upper shell.
In the technical scheme, the upper shell surrounds the first radial magnetic suspension bearing and the axial magnetic suspension bearing, so that the first radial magnetic suspension bearing and the axial magnetic suspension bearing are operated in a closed environment, and pollution is avoided.
Preferably, a second sealing ring is arranged between the upper shell and the outer shell, and the centrifugal shaft penetrates through the second sealing ring.
In this technical scheme, the second sealing washer has kept apart shell and epitheca and sealed inside cavity, avoids waiting to extract the raw materials leakage.
Preferably, a cover plate is arranged at the upper part of the upper shell, and a third sealing ring is arranged between the upper shell and the cover plate.
In the technical scheme, the third sealing ring seals the upper shell, and raw materials to be extracted are prevented from leaking.
Preferably, the centrifugal extractor further comprises an axial position sensor, wherein the axial position sensor is arranged on the outer peripheral side of the axial magnetic suspension bearing, and the axial position sensor is used for monitoring the axial displacement of the centrifugal shaft.
In the technical scheme, the axial displacement of the eccentric shaft is monitored by the axial position sensor, so that the axial magnetic suspension bearing can be conveniently and timely adjusted, the shaft is kept to be suspended, and the friction increase is avoided.
Preferably, the centrifugal extractor further comprises a first radial position sensor arranged above the first radial magnetic suspension bearing for monitoring the radial displacement of the upper part of the drum.
In the technical scheme, the first radial position sensor monitors radial displacement of the centrifugal shaft, so that the first radial magnetic suspension bearing can be conveniently adjusted in time, and friction increase is avoided.
Preferably, the centrifugal extractor further comprises a second radial position sensor arranged above the second radial magnetic suspension bearing for monitoring the radial displacement of the lower part of the rotary drum.
In the technical scheme, the second radial position sensor monitors radial displacement of the centrifugal shaft, so that the second radial magnetic suspension bearing can be conveniently and timely adjusted, and friction increase is avoided.
Preferably, a first feed port and a feed channel are arranged at the bottom of the rotary drum, the centrifugal shaft penetrates through the first feed port, and a stirring part is arranged below the first feed port on the centrifugal shaft.
In the technical scheme, the stirring part enables the liquid inlet of the first feeding port to be fully stirred, so that the subsequent treatment is convenient.
Preferably, the bottom of the rotary drum is provided with a first feeding port, the side surface of the shell is provided with a second feeding port, a feeding channel is formed between the first feeding port and the second feeding port by limiting the rotary drum and the shell, and a guide blade is arranged below the first feeding port on the shell.
In the technical scheme, the feed liquid is fully stirred and guided to flow into the rotary drum when flowing in the feed channel, so that the subsequent treatment is facilitated.
Preferably, the upper part in the shell is provided with a heavy phase collecting chamber, a heavy phase outlet and a heavy phase weir; the lower part of the heavy phase outlet is provided with a light phase collecting chamber, and the light phase collecting chamber is provided with a light phase outlet; the upper part of the light phase collecting chamber is provided with a light phase weir.
In the technical scheme, after the components in the feed liquid are centrifugally separated in the rotary drum, the components flow out from different outlets respectively, so that the components are convenient to collect and utilize.
The invention also provides a centrifugal extraction system which comprises a plurality of centrifugal extractors, wherein the centrifugal extractors are connected in series and/or in parallel.
In the technical scheme, when part of centrifugal extractors in the centrifugal extraction system fail, the centrifugal extractors can be rapidly switched to other equipment to continue working without suspending the operation of the whole centrifugal extraction system for maintenance, thereby greatly improving the reliability and the working efficiency of the centrifugal extraction system.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
the centrifugal extractor and the centrifugal extraction system comprising the same omit a shaft seal, so that the internal atmosphere of the centrifugal extractor is isolated from the external environment, and the external leakage of internal media and the introduction of pollution to the external environment are avoided; the magnetic suspension bearing applies balanced magnetic force to the centrifugal shaft, and makes the centrifugal shaft not contact with other parts in the axial direction and the radial direction, and each part is uniformly stressed when the centrifugal shaft and the rotary drum work, so that abrasion caused by contact friction is avoided, the vibration of the rotor is convenient to control on line, the running stability of the centrifugal extractor is improved, the service life of equipment is prolonged, the continuous working time of the system is prolonged, and the cascade centrifugal extraction process is stabilized.
After the magnetic suspension bearing is assembled, the magnetic suspension bearing can be adjusted on line, so that the maintenance difficulty is reduced; the shaft seal is omitted, the limited equipment space is saved, the length of a shaft system is reduced, and the cost waste is avoided; the shell is used as the pressure boundary of the extraction system, can effectively limit the liquid or steam erosion driving mechanism of the extractant, and is easy to realize high-pressure and high-temperature extraction.
The radial magnetic suspension bearing is arranged at the upper part of the rotary drum, so that the stress area of the magnetic bearing can be increased, and the axial length of the magnetic bearing is greatly reduced under the condition of certain stress. The design mode can effectively increase the bearing capacity of the magnetic bearing, improve the running stability, reduce the axial length of the centrifugal extractor and improve the compactness of equipment.
Drawings
FIG. 1 is a schematic diagram of a centrifugal extractor according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a centrifugal extractor according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a centrifugal extractor according to a third embodiment of the present invention;
FIG. 4 is a schematic diagram of a centrifugal extractor according to a fourth embodiment of the present invention;
FIG. 5 is a schematic view of a first radial magnetic suspension bearing of a centrifugal extractor according to the present invention;
FIG. 6 is a schematic diagram of a second radial magnetic suspension bearing of the centrifugal extractor of the present invention;
fig. 7 is a schematic structural view of an axial magnetic suspension bearing of a centrifugal extractor according to the present invention.
Description of the reference numerals
The motor comprises a motor 1, a motor base 11, a motor rotor 12 and a motor stator 13;
a magnetic coupling 2, an outer magnet 21, a shield 22, and an inner magnet 23;
an upper case 3, a second seal ring 31, a first seal ring/third seal ring 32, a cover plate 33;
a first radial magnetic bearing 4, a first stator 41, a first rotor 42, a first radial position sensor 43;
a second radial magnetic bearing 5, a second stator 51, a second rotor 52, a second radial position sensor 53;
an axial magnetic suspension bearing 6, a third stator 61, a force receiving part 62 and an axial position sensor 63;
a housing 7, a heavy phase collection chamber 71, a heavy phase outlet 72, a heavy phase weir 73, a light phase collection chamber 74, a light phase outlet 75, and a light phase weir 76;
a drum 8, a first feed port 81, a feed channel 82, a second feed port 83;
the centrifugal shaft 9, the stirring section 91, and the guide vane 92.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Example 1
Fig. 1 shows a centrifugal extractor according to a first embodiment of the invention. This centrifugal extractor includes shell 7, rotary drum 8 and centrifugal shaft 9, and shell 7 sets up outside rotary drum 8, and centrifugal shaft 9 and rotary drum 8 fixed connection, centrifugal extractor still includes: magnetic suspension bearings for generating magnetic forces in the radial and axial directions of the centrifugal shaft 9 and the drum 8 to restrict displacement of the centrifugal shaft 9 and the drum 8; as shown in fig. 5, the magnetic suspension bearing comprises a first radial magnetic suspension bearing 4, and the first radial magnetic suspension bearing 4 is used for limiting radial displacement of the upper part of the rotary drum 8; the first radial magnetic suspension bearing 4 includes a first stator 41 and a first rotor 42, the first rotor 42 being provided on the outer peripheral side of the upper portion of the drum 8, the first stator 41 being provided on the upper portion of the housing 7 and being provided correspondingly on the outer peripheral side of the first rotor 42; as shown in fig. 6, the magnetic suspension bearing further comprises a second radial magnetic suspension bearing 5, the second radial magnetic suspension bearing 5 being used to limit the radial displacement of the drum 8; the second radial magnetic bearing 5 includes a second stator 51 and a second rotor 52, the second rotor 52 being provided on the outer peripheral side of the lower portion of the drum 8, the second stator 51 being provided on the lower portion of the housing 7 and being correspondingly provided on the outer peripheral side of the second rotor 52. The centrifugal extractor adopts the structure, so that the internal and external atmospheres of the centrifugal extractor are isolated, the leakage of extraction raw materials is avoided, the displacement of the centrifugal shaft 9 and the rotary drum 8 is limited through the magnetic suspension bearing, the bearing is not contacted with the shaft, friction is avoided, the service life of the bearing is obviously prolonged, the continuous working time of the centrifugal extractor is prolonged, the stress area of the magnetic suspension bearing is increased, the length in the axial direction is greatly reduced, the bearing capacity of the rotary drum 8 is improved, the stability and the load are increased, the volume of equipment is reduced, and the equipment is compact and reliable.
The centrifugal extractor further comprises a motor 1, wherein the motor 1 is arranged at the upper part of the shell 7 and is used for driving the centrifugal shaft 9 to rotate; the motor 1 includes a motor stator 13 and a motor rotor 12, the motor rotor 12 being provided on the centrifugal shaft 9, the motor stator 13 being provided on the outer peripheral side of the motor rotor 12. The motor 1 drives the centrifugal shaft 9 to rotate by controlling electromagnetic force generated by energizing between the motor stator 13 and the motor rotor 12, reduces friction force when the mechanical shaft is used for operation in the prior art, and improves the sealing performance of the equipment by installing the motor in the upper space of the shell.
In other embodiments, a shielding sleeve may be disposed between the motor stator 13 and the motor rotor 12 depending on the corrosiveness of the solution; cooling channels may also be provided near the motor stator 13 for cooling the motor 1 and the magnetic bearings.
As shown in fig. 7, the magnetic suspension bearing further includes an axial magnetic suspension bearing 6, the axial magnetic suspension bearing 6 is disposed outside the housing 7 and above the drum 8, and the axial magnetic suspension bearing 6 includes a third stator 61; the centrifugal shaft 9 is provided with a force receiving part 62, and the third stators 61 are arranged at two sides of the force receiving part 62 and are used for limiting the axial displacement of the centrifugal shaft 9; the axial magnetic suspension bearing 6 is an electromagnetic suspension bearing. Magnetic force exists between the third stator 61 and the stress part 62, so that the centrifugal shaft 9 is in a suspension state in the axial direction, and the friction force during operation is greatly reduced.
In other embodiments, the axial magnetic bearing 6 may be other types of magnetic bearings; the axial magnetic bearing 6 may also be arranged above the first radial magnetic bearing 4 or elsewhere without affecting the normal operation of the centrifugal extractor.
The centrifugal extractor further comprises an upper shell 3, and a first radial magnetic suspension bearing 4 and an axial magnetic suspension bearing 6 are positioned in the upper shell 3. The upper shell 3 surrounds the first radial magnetic suspension bearing 4 and the axial magnetic suspension bearing 6, so that the two bearings operate in a closed environment, and pollution is avoided.
A second sealing ring 31 is arranged between the upper shell 3 and the outer shell 7, and the centrifugal shaft 9 penetrates through the second sealing ring 31. The second sealing ring 31 isolates the outer shell 7 from the upper shell 3 and seals the internal chamber from leakage of the raw material to be extracted.
A cover plate 33 is arranged at the upper part of the upper shell 3, and a third sealing ring 32 is arranged between the upper shell 3 and the cover plate 33. The third sealing ring 32 seals the upper case 3 to prevent leakage of the raw material to be extracted.
The centrifugal extractor further comprises an axial position sensor 63, wherein the axial position sensor 63 is arranged on the outer peripheral side of the axial magnetic suspension bearing 6, and the axial position sensor 63 is used for monitoring the axial displacement of the centrifugal shaft 9, so that the axial magnetic suspension bearing 6 can be conveniently and timely adjusted, the shaft is kept to be suspended, and the friction is prevented from increasing.
The centrifugal extractor further comprises a first radial position sensor 43, wherein the first radial position sensor 43 is arranged above the first radial magnetic suspension bearing 4 and is used for monitoring radial displacement of the upper part of the rotary drum 8, so that the first radial magnetic suspension bearing 4 can be conveniently and timely adjusted, and friction increase is avoided.
The centrifugal extractor further comprises a second radial position sensor 53, wherein the second radial position sensor 53 is arranged above the second radial magnetic suspension bearing 5 and is used for monitoring radial displacement of the upper part of the rotary drum 8, so that the second radial magnetic suspension bearing 5 can be conveniently and timely adjusted, and friction increase is avoided.
In other embodiments, the positions of the axial position sensor 63, the first radial position sensor 43, and the second radial position sensor 53 may be adjusted without affecting the proper operation of the centrifugal extractor.
The bottom of the rotary drum 8 is provided with a first feed port 81 and a feed channel 82, the centrifugal shaft 9 passes through the first feed port 81, and a stirring part 91 is arranged below the first feed port 81 on the centrifugal shaft 9, and the stirring part 91 is in a blade shape. The stirring portion 91 sufficiently stirs the liquid fed from the first feeding port 81, thereby facilitating the subsequent processing.
In other embodiments, the stirring portion 91 may be cylindrical, turbine-shaped, or otherwise shaped.
The upper part in the shell 7 is provided with a heavy phase collecting chamber 71, a heavy phase outlet 72 and a heavy phase weir 73; a light phase collecting chamber 74 is arranged at the lower part of the heavy phase outlet 72, and a light phase outlet 75 is arranged on the light phase collecting chamber 74; the upper portion of the light phase collection chamber 74 is provided with a light phase weir 76. The heavy phase collecting chamber 71, the heavy phase outlet 72 and the heavy phase weir 73 cooperate together to collect and guide out the heavy phase separated in the rotary drum 8, the light phase weir 76 separates the light phase from the liquid in the rotary drum 8, the light phase is collected by the light phase collecting chamber 74 and flows out through the light phase outlet 75, and each component in the liquid flows out from different outlets respectively, so that the liquid is convenient to collect and use.
The invention also provides a centrifugal extraction system which comprises a plurality of centrifugal extractors, wherein the centrifugal extractors work in parallel. When part of centrifugal extractors in the centrifugal extraction system fail, the centrifugal extractors can be quickly switched to other equipment to continue working without suspending the operation of the whole centrifugal extraction system for maintenance, thereby greatly improving the reliability and the working efficiency of the centrifugal extraction system.
In other embodiments, a portion of the centrifugal extractors may also be operated in series.
Example two
Fig. 2 shows a centrifugal extractor according to a second embodiment of the invention. Most of the structures of this embodiment are the same as those of the first embodiment, except that the bottom of the drum 8 is provided with a first feed port 81, two sides of the drum are provided with second feed ports 83, a feed channel 82 connecting the first feed port 81 and the second feed port 83 is defined by the drum 8 and the housing 7, and a guide vane 92 is provided on the housing 7 below the first feed port 81.
In the present embodiment, the feed passage 82 and the stirring section 91 are not provided at the bottom of the drum 8.
Correspondingly, the side of the shell 7 is provided with a second feed inlet 83, the bottom of the rotary drum 8 is provided with a first feed inlet 81, a feed channel 82 is defined between the first feed inlet 81 and the second feed inlet 83 by the rotary drum 8 and the shell 7, and a guide vane 92 is arranged on the shell 7 below the first feed inlet 81. The feed liquid is thoroughly agitated as it flows in the feed channel 82 and is directed into the bowl 8 for subsequent processing.
Example III
Fig. 3 shows a third embodiment of the centrifugal extractor of the present invention. Most of the structures of the embodiment are the same as those of the first embodiment, except that the motor 1 is arranged on a motor base 11 above the housing 7, and the motor 1 drives the centrifugal shaft 9 to rotate through the magnetic coupling 2.
In the present embodiment, the magnetic coupling 2 includes an outer magnet 21 and an inner magnet 23, the inner magnet 23 is fixed on the centrifugal shaft 9, the outer magnet 21 is disposed on the outer peripheral side of the inner magnet 23 and fixedly connected with the motor rotor 12, and the magnetic coupling 2 is used to transmit torque to the centrifugal shaft 9 to drive the centrifugal shaft 9 to rotate. The motor 1 is not in direct contact with the centrifugal shaft 9 and the rotary drum 8, and torque is transmitted in a non-contact manner through the magnetic coupling 2 to drive the centrifugal shaft 9 to rotate, so that a sealing device is omitted, and the type selection range of the motor 1 is enlarged.
An inner magnet 23 is fixedly mounted on the upper outer surface of the off-axis shaft 9. The inner magnet 23 has a large area, so that the moment can be transmitted stably.
The magnetic coupling 2 further comprises a shield 22, the shield 22 being arranged between the outer magnet 21 and the inner magnet 23. The shielding cover 22 separates the outer magnet 21 and the inner magnet 23, so that the leakage of raw materials to be extracted is avoided, and the sealing performance of the equipment is improved.
The centrifugal extractor further comprises an upper casing 3, the upper casing 3 being adapted to seal the first radial magnetic bearing 4. The magnetic coupling 2 is arranged in the motor base 11 above the shell 7, a first sealing ring 32 is arranged between the shielding cover 22 and the upper shell 3, and the magnetic coupling 2 is fixedly connected with the upper shell 3 through a flange. The first seal 32 isolates the shield 22 from the upper housing 3 and seals the interior chamber from the environment inside and outside the shield 22 and the upper housing 3.
Example IV
Fig. 4 shows a fourth embodiment of the centrifugal extractor of the present invention. Most of the structures of the present embodiment are the same as those of the embodiment, except that the rotary drum 8 is provided with a first feed port 81, two sides of the rotary drum are provided with second feed ports 83, a feed channel 82 connecting the first feed port 81 and the second feed port 83 is defined by the rotary drum 8 and the housing 7, and a guide vane 92 is provided on the housing 7 below the first feed port 81.
In the present embodiment, the feed passage 82 and the stirring section 91 are not provided at the bottom of the drum 8.
Correspondingly, the side of the shell 7 is provided with a second feed inlet 83, the bottom of the rotary drum 8 is provided with a first feed inlet 81, a feed channel 82 is defined between the first feed inlet 81 and the second feed inlet 83 by the rotary drum 8 and the shell 7, and a guide vane 92 is arranged on the shell 7 below the first feed inlet 81. The feed liquid is thoroughly agitated as it flows in the feed channel 82 and is directed into the bowl 8 for subsequent processing.
In the implementation process, various embodiments of the present invention may be combined to obtain better technical effects.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (18)
1. The utility model provides a centrifugal extraction machine, includes shell, rotary drum and centrifugal shaft, the shell sets up outside the rotary drum, centrifugal shaft with rotary drum fixed connection, its characterized in that, centrifugal extraction machine still includes:
a magnetic suspension bearing for generating magnetic forces in radial and axial directions of the centrifugal shaft and the drum to restrict displacement of the centrifugal shaft and the drum;
the magnetic suspension bearing comprises a first radial magnetic suspension bearing, and the first radial magnetic suspension bearing is used for limiting radial displacement of the upper part of the rotary drum; the first radial magnetic suspension bearing comprises a first stator and a first rotor, the first rotor is arranged on the outer peripheral side of the upper part of the rotary drum, and the first stator is arranged on the upper part of the shell and is correspondingly arranged on the outer peripheral side of the first rotor;
the magnetic suspension bearing further comprises a second radial magnetic suspension bearing, wherein the second radial magnetic suspension bearing is used for limiting radial displacement of the lower part of the rotary drum; the second radial magnetic suspension bearing comprises a second stator and a second rotor, the second rotor is arranged on the outer peripheral side of the lower portion of the rotary drum, and the second stator is arranged on the lower portion of the shell and correspondingly arranged on the outer peripheral side of the second rotor.
2. The centrifugal extractor of claim 1 further comprising a motor disposed in an upper portion of the housing for driving the centrifugal shaft in rotation; the motor comprises a motor stator and a motor rotor, wherein the motor rotor is arranged on the centrifugal shaft, and the motor stator is arranged on the outer periphery side of the motor rotor.
3. The centrifugal extractor of claim 1 further comprising a motor disposed in an upper portion of the housing for driving rotation of the centrifugal shaft.
4. A centrifugal extractor according to claim 3, further comprising a magnetic coupling comprising an outer magnet and an inner magnet, the inner magnet being fixed to the centrifugal shaft, the outer magnet being disposed on an outer peripheral side of the inner magnet and being electrically connected to the motor, the magnetic coupling being for transmitting torque to the centrifugal shaft to drive the centrifugal shaft to rotate.
5. The centrifugal extractor of claim 4 wherein said inner magnet is fixedly mounted on an upper outer surface of said eccentric shaft.
6. The centrifugal extractor of claim 4 wherein the magnetic coupling further includes a shield disposed between the outer magnet and the inner magnet.
7. The centrifugal extractor of claim 6 further comprising an upper housing for sealing the first radial magnetic bearing; the magnetic coupling is arranged in the motor base above the shell, and a first sealing ring is arranged between the shielding cover and the upper shell.
8. The centrifugal extractor of claim 1 wherein said magnetic bearings further comprise axial magnetic bearings disposed outside of said housing above said bowl, said axial magnetic bearings comprising a third stator;
the centrifugal shaft is provided with a stress part, and the third stators are arranged on two sides of the stress part and used for limiting the axial displacement of the centrifugal shaft.
9. The centrifugal extractor of claim 8 further comprising an upper housing, said first radial magnetic bearing and said axial magnetic bearing being located within said upper housing.
10. The centrifugal extractor of claim 9 wherein a second seal is provided between said upper housing and said outer housing, said centrifugal shaft extending through said second seal.
11. The centrifugal extractor of claim 9 wherein a cover plate is provided on the upper portion of the upper housing, and a third seal ring is provided between the upper housing and the cover plate.
12. The centrifugal extractor of claim 8 further comprising an axial position sensor provided on the outer peripheral side of the axial magnetic bearing, the axial position sensor being configured to monitor the axial displacement of the centrifugal shaft.
13. The centrifugal extractor of claim 1 further comprising a first radial position sensor disposed above the first radial magnetic bearing for monitoring radial displacement of the upper portion of the bowl.
14. The centrifugal extractor of claim 1 further comprising a second radial position sensor disposed above the second radial magnetic bearing for monitoring radial displacement of the lower portion of the bowl.
15. The centrifugal extractor according to claim 1, wherein the bottom of the drum is provided with a first feed opening and a feed channel, the centrifugal shaft passes through the feed opening, and a stirring portion is provided on the centrifugal shaft below the feed opening.
16. The centrifugal extractor according to claim 1, wherein the bottom of the drum is provided with a first feed inlet, the side of the housing is provided with a second feed inlet, a feed channel is defined between the first feed inlet and the second feed inlet by the drum and the housing, and a guide vane is provided on the housing below the first feed inlet.
17. The centrifugal extractor according to claim 1, wherein the upper portion in the housing is provided with a heavy phase collection chamber, a heavy phase outlet and a heavy phase weir; the lower part of the heavy phase outlet is provided with a light phase collecting chamber, and the light phase collecting chamber is provided with a light phase outlet; the upper part of the light phase collecting chamber is provided with a light phase weir.
18. A centrifugal extraction system comprising a plurality of centrifugal extractors according to any one of claims 1-17, a plurality of said centrifugal extractors being connected in series and/or in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310629274.6A CN116651015A (en) | 2023-05-30 | 2023-05-30 | Centrifugal extraction machine and centrifugal extraction system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310629274.6A CN116651015A (en) | 2023-05-30 | 2023-05-30 | Centrifugal extraction machine and centrifugal extraction system comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116651015A true CN116651015A (en) | 2023-08-29 |
Family
ID=87725494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310629274.6A Pending CN116651015A (en) | 2023-05-30 | 2023-05-30 | Centrifugal extraction machine and centrifugal extraction system comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116651015A (en) |
-
2023
- 2023-05-30 CN CN202310629274.6A patent/CN116651015A/en active Pending
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