CN111644110A - A high temperature agitating unit for pyrolysis of radioactive organic waste liquid - Google Patents
A high temperature agitating unit for pyrolysis of radioactive organic waste liquid Download PDFInfo
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- CN111644110A CN111644110A CN202010338175.9A CN202010338175A CN111644110A CN 111644110 A CN111644110 A CN 111644110A CN 202010338175 A CN202010338175 A CN 202010338175A CN 111644110 A CN111644110 A CN 111644110A
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- 239000010815 organic waste Substances 0.000 title claims abstract description 28
- 230000002285 radioactive effect Effects 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 title claims abstract description 26
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 195
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 239000000725 suspension Substances 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 238000012856 packing Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- 239000000945 filler Substances 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 5
- RENIMWXTRZPXDX-UHFFFAOYSA-N [Ti].[Ni].[W] Chemical compound [Ti].[Ni].[W] RENIMWXTRZPXDX-UHFFFAOYSA-N 0.000 claims description 3
- 229910001119 inconels 625 Inorganic materials 0.000 claims description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 13
- 239000010935 stainless steel Substances 0.000 description 14
- 229910001220 stainless steel Inorganic materials 0.000 description 14
- 239000007787 solid Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 8
- 206010039509 Scab Diseases 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000035882 stress Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
- B01F33/833—Devices with several tools rotating about different axis in the same receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
- B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/008—Pyrolysis reactions
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F2035/35—Use of other general mechanical engineering elements in mixing devices
- B01F2035/351—Sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F2035/35—Use of other general mechanical engineering elements in mixing devices
- B01F2035/352—Bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—Treatment of water, waste water or sewage
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Accessories For Mixers (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a high-temperature stirring device for pyrolysis of radioactive organic waste liquid, which comprises a stirring container, a driving mechanism and a moving mechanism, wherein the stirring container comprises a container body, an upper cover plate and a lower bottom plate, the upper cover plate is fixedly arranged at the upper end of the container body, the lower bottom plate is fixedly arranged at the lower end of the container body, the moving mechanism comprises a stirring shaft, a magnetic suspension bearing assembly, a connecting assembly, a base and a support, the base is clamped at a central opening of the upper cover plate, a rolling bearing is arranged in an inner hole of the base, the stirring shaft comprises a stirring end and a driving end, the stirring shaft penetrates through the rolling bearing to be rotatably supported in the base, so that the stirring end is positioned in the stirring container, the driving end is connected with the driving mechanism through the connecting assembly, the support is sleeved on the stirring. The invention can overcome the axial acting force generated in the stirring process, so that the stirring process is stably carried out.
Description
Technical Field
The invention belongs to the technical field of stirring, and particularly relates to a high-temperature stirring device for pyrolysis of radioactive organic waste liquid.
Background
A common high-temperature stirring device can generally meet the stirring of non-radioactive media such as liquid, gas or solid powder, but for the working condition that radioactive substances (such as radioactive organic waste) generate solid through pyrolysis, due to high radiation intensity, manual frequent operation is not suitable, and solid scabs generated by reaction cannot be removed in time, so that metal balls (such as stainless steel balls) are placed into the radioactive organic waste to be stirred together, the solid scabs generated by reaction are attached to the stainless steel balls, the stainless steel balls are stirred by stirring paddles, the solid scabs attached to the stainless steel balls are ground into solid powder during relative motion friction, and then the solid scabs enter an ash discharging device through the bottom of the stirring device.
However, the above-mentioned stirring device has at least the following disadvantages:
the resistance acting on the stirring paddle can jump along with the stirring of the stainless steel balls, and the gravity of the stainless steel balls acts on the stirring paddle, so that the force transmitted to the stirring device in the axial direction is larger, and the existing stirring device is not strictly positioned in the axial direction, and the stirring shaft has a shaking space in the radial direction, so that the bearing is stressed unevenly and is easy to wear;
for the organic waste pyrolysis stirring device with the working temperature of more than 450 ℃, a sliding bearing with a wear-resistant layer sprayed on the surface is generally selected as the bearing, but once the stress of the coating sprayed on the surface of the bearing is uneven and exceeds allowable stress, the coating is peeled off, and the peeled coating material enters the gap of the bearing, so that the friction force between the bearings is greatly increased, the stirring paddle is blocked and cannot rotate, and shutdown and production stop are caused;
for the cracking of radioactive organic waste, the cracking needs to be carried out in an anaerobic environment, and the sealing effect of the existing stirring device is difficult to ensure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-temperature stirring device for pyrolyzing the radioactive organic waste liquid, which can stably carry out the stirring process by the axial acting force generated in the stirring process.
In order to solve the technical problems, the invention adopts the following technical scheme:
a high-temperature stirring device for the pyrolysis of radioactive organic waste liquid comprises a stirring container, a driving mechanism and a moving mechanism, wherein the stirring container comprises a container body, an upper cover plate and a lower bottom plate, the upper cover plate is fixedly arranged at the upper end of the container body, the lower bottom plate is fixedly arranged at the lower end of the container body,
the motion mechanism comprises a stirring shaft, a magnetic suspension bearing assembly, a connecting assembly, a base and a bracket,
the base is clamped at the central opening of the upper cover plate, and an inner hole of the base is provided with a rolling bearing;
the stirring shaft comprises a stirring end and a driving end, the stirring shaft penetrates through the rolling bearing and is rotatably supported in the base, so that the stirring end is positioned in the stirring container, and the driving end is connected with the driving mechanism through the connecting component;
the bracket is sleeved on the stirring shaft and is connected with the base;
the magnetic suspension bearing assembly is sleeved on the support, and the upper end of the magnetic suspension bearing assembly is fixedly connected with the connecting assembly.
Preferably, the connecting assembly comprises a universal yoke, a spline, a yoke,
the universal yoke is sleeved on the driving end of the stirring shaft, the driving end is provided with a fastening nut, the spline is connected with the universal yoke, and a central hole matched with the fastening nut is formed in the spline, so that the fastening nut is clamped in the central hole of the spline;
one end of the connecting shaft yoke is fixedly connected with the spline, and the other end of the connecting shaft yoke is connected with the driving structure.
Preferably, the magnetic suspension assembly comprises a first magnet and a second magnet, the first magnet and the second magnet are both of annular structures internally wrapped with permanent magnets,
the first magnet is clamped on the support, the second magnet is fixedly connected with the universal yoke and rotates along with the universal yoke, and the magnetic polarities of the adjacent surfaces of the first magnet and the second magnet are the same.
Preferably, the stirring device further comprises a sealing mechanism, the sealing sleeve is arranged on the stirring shaft and is positioned between the base and the bracket,
the sealing mechanism adopts nitrogen gas for sealing and comprises a filler seat, a fifth shaft sleeve and a filler,
the packing seat is connected to the base through a bolt and is connected with the lower end face of the support, the upper part of the packing seat is embedded in an inner hole in the lower part of the support, and a nitrogen interface is arranged on the packing seat;
the fifth shaft is sleeved between the packing seat and the stirring shaft, the packing is arranged in an annular space between the packing seat and the shaft sleeve, a gland is arranged on the upper portion of the packing, and the gland is fixed on the packing seat.
Preferably, the lower cover plate comprises a rake and a grate,
the centers of the rakes and the grate are provided with matched through holes, and the stirring end of the stirring shaft penetrates through the central through holes of the rakes and the grate;
the rakes and the grates are connected through annular grooves which are matched with each other.
Preferably, a sliding bearing is arranged between the central through hole of the grate and the stirring shaft, and the stirring end of the stirring shaft passes through the central through holes of the rakes and the grate and is rotatably supported in the central through hole of the grate through the sliding bearing.
Preferably, the rolling bearing and the sliding bearing are made of tungsten-nickel-titanium alloy materials.
Preferably, a plurality of stirring paddles are arranged at the stirring end of the stirring shaft, and the stirring paddles are arranged independently.
Preferably, the mixer body, the upper cover plate, the lower bottom plate, the mixing shaft, the base, the bracket and the mixing paddle are made of inconel625 alloy materials.
The invention has the beneficial effects that:
(1) the magnetic suspension bearing assembly is adopted, the axial force is converted into the relative rotation without friction force under the action of magnetic force, the rotation torque of the stirring shaft is reduced, the axial downward acting force of the stirring shaft in the stirring process is overcome, the stirring shaft is accurately positioned in the axial direction, and the stable work of the stirring shaft at the preset balance position is ensured.
(2) Adopt antifriction bearing and sliding bearing to carry out the multiple spot restriction to the (mixing) shaft in the footpath to and increased about the round pin and carried out supplementary radial positioning restriction, in order to prevent to appear the swing and lead to the bearing atress inhomogeneous at the stirring in-process, cause frictional wear.
(3) The bearing made of the high-temperature-resistant self-lubricating alloy material is adopted to replace the traditional bearing sprayed with the wear-resistant layer, the problems of stirring failure and the like caused by coating fragments falling off due to bearing abrasion are avoided, and the service life is longer.
(4) Adopt nitrogen gas seal and multichannel sealing washer to seal, can reduce the risk that radioactive organic waste liquid reveals.
(5) The stirring paddle is arranged in a segmented and independent mode, so that internal stress and thermal stress applied in the stirring process can be reduced.
Drawings
FIG. 1 is a schematic structural diagram of a high-temperature stirring pyrolysis device for radioactive environment in an embodiment of the present invention;
in the figure: 1-a nut; 2-universal yoke; 3-a magnetic bearing assembly; 4-stirring shaft; 5-a bracket; 6-pressing the cover; 7-a second filler; 8-a fifth shaft sleeve; 9-a filler seat; 10-rolling bearings; 11-a base; 12-upper pin; 13-upper cover plate; 14-a first sleeve; 15-a first filler; 16-a body; 17-a stirring paddle; 18-ash blocking ring; 19-rake; 20-a support ring; 21-fine-toothed comb; 22-bolt; 23-lower pin; 24-a slide bearing; 25-a second nut; 26-shaft yoke; 27-spline; 28-sealing ring; 29-a fourth sleeve; 30-a second bushing; 31-a third sleeve; 32-a seventh sleeve; 33-sixth bushing.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment discloses a high temperature stirring apparatus for pyrolysis of radioactive organic waste liquid, comprising: stirring container, actuating mechanism, motion.
Specifically, the agitation vessel includes a vessel body 16, an upper cover plate 13, and a lower plate, the vessel body 16 is preferably cylindrical, and the upper cover plate 13 and the lower plate are hermetically connected and fixed to an upper end opening and a lower end opening of the cylindrical vessel body 16, respectively, to prevent leakage of the radioactive organic waste liquid.
In this embodiment, one or more evenly distributed upper pins 12 are disposed on the upper end surface of the body 16 for fastening and positioning the upper cover plate 13, so as to prevent the stirring shaft 4 from shifting due to the radial force of the stirring shaft 4 during the stirring process, and ensure the stability of the rotation of the stirring shaft 4. Correspondingly, one or more evenly distributed lower pins 23 are provided on the lower end surface of the body 16 for fastening and positioning the lower plate.
Specifically, the motion mechanism comprises a stirring shaft 4, a magnetic suspension bearing assembly 3, a connecting assembly, a base 11 and a bracket 5. The center of the upper cover plate 13 is provided with an opening, and the lower end of the base 11 is provided with a convex part matched with the center opening of the upper cover plate 13, so that the convex part is clamped at the center opening of the upper cover plate 13 and is fixedly connected with the upper cover plate 13 through a fastener. The inner hole of the base 11 is provided with a concave part for clamping a rolling bearing 10 matched with the stirring shaft 4, and the outer ring of the rolling bearing 10 is matched and fixed with the concave part on the inner hole of the base 11. The stirring shaft 4 comprises a stirring end (bottom end) and a driving end (top end), and the stirring shaft 4 penetrates through an inner ring of the rolling bearing 10 to be rotatably supported inside the base 11, so that the stirring end is positioned inside the stirring container. A first shaft sleeve 14, a second shaft sleeve 30 and a third shaft sleeve 31 which are matched are respectively arranged between the base 11 and the stirring shaft 4, between the rolling bearing 10 and the stirring shaft 4 and between the rolling bearing 10 and the base 11, and a first filler 15 is arranged between the first shaft sleeve 14 and the base 11 so as to improve the sealing effect. The stirring shaft 4 is provided with a bulge matched with the first shaft sleeve 14, the lower end face of the first shaft sleeve 14 is limited, and a matched sealing ring 38 is arranged between the first shaft sleeve and the lower end face of the first shaft sleeve 14. The drive end of the stirring shaft is connected with the driving mechanism through the connecting component, so that the stirring shaft 4 is driven by the driving mechanism to rotate, and the stirring effect on the radioactive organic waste liquid placed in the stirring container is realized. The support 5 is sleeved on the stirring shaft 4, the lower end of the support 5 is fixedly connected with the base 11 through bolts and the like, and a fourth shaft sleeve 29 is arranged between the support 5 and the stirring shaft 4. The bracket 5 is provided with a boss along the radial direction, the magnetic suspension bearing assembly 3 is sleeved on the bracket 5, the magnetic suspension bearing assembly 3 is supported on the boss, and the upper end of the magnetic suspension bearing assembly 3 is fixedly connected with the connecting assembly.
In this embodiment, the connecting assembly includes the universal yoke 2, the spline 27, and the shaft coupling yoke 26. The magnetic suspension bearing assembly 3 comprises a first magnet and a second magnet, the first magnet and the second magnet are both of circular ring structures internally wrapped with permanent magnets, the first magnet is clamped on a boss of the support 5, the magnetic polarities of the adjacent surfaces of the second magnet and the first magnet are the same, so that the repulsive magnetic force is generated between the first magnet and the second magnet, and the specific magnetic force is calculated according to the rated load of the stirring device. The universal yoke 2 is sleeved on the driving end of the stirring shaft 4, the second magnet is fixedly connected with the universal yoke 2 through a bolt and rotates along with the universal yoke 2, and the first magnet does not rotate. The driving end of the stirring shaft 4 is provided with a fastening nut 1, a central hole matched with the fastening nut 1 is arranged inside the spline 27, the fastening nut is clamped in the central hole of the spline 27, the spline 27 and the universal yoke 2 are fixedly connected through a bolt, one end of the connecting shaft yoke 26 is fixedly connected with the spline 27, and the other end of the connecting shaft yoke is fixedly connected with a driving mechanism (such as an output shaft of a motor), so that the stirring shaft 4 is driven to rotate.
In this embodiment, the stirring device further includes a sealing mechanism, and the sealing mechanism is sleeved on the stirring shaft 4 and is located between the base 11 and the bracket 5. Sealing mechanism adopts nitrogen gas to seal, including filler seat 9, fifth axle cover 8, second filler 7, wherein: the packing seat 9 is connected to the base through a bolt and is connected with the lower end face of the support 5, the upper part of the packing seat 9 is embedded in an inner hole at the lower end of the support 5, and a nitrogen interface is arranged on the packing seat 9 and is used for connecting a nitrogen supply mechanism; the fifth shaft sleeve 8 is arranged between the filler seat 9 and the stirring shaft 4, and the upper end and the lower end of the fifth shaft sleeve are respectively in contact connection with the fourth shaft sleeve 29 and the second shaft sleeve 30 for limiting; the second packing 7 is arranged in an annular space between the packing seat 9 and the fifth shaft sleeve 8, a gland 6 is arranged at the upper part of the second packing 7, and the gland 6 is fixed on the packing seat 9. The second filler 7 is a high-temperature-resistant nitrogen sealing filler, and continuous positive-pressure nitrogen is blown into the nitrogen sealing filler to realize the function of isolating oxygen outside the stirring shaft. And matched high-temperature-resistant sealing rings 38 are also arranged between the fifth shaft sleeve 8 and the second shaft sleeve 30 and between the fifth shaft sleeve 8 and the fourth shaft sleeve 29 respectively to improve the sealing effect.
In this embodiment, one or more lower pins 23 and bolts 22 are uniformly distributed on the lower end surface of the body 16 to fasten and position the lower bottom plate, so as to prevent the stirring shaft from deviating due to the radial acting force of the stirring shaft during the stirring process, and ensure the stability of the rotation of the stirring shaft. The lower bottom plate comprises a rake 19 and a grate 21, and the centers of the rake 19 and the grate 21 are provided with matched through holes. The rake 19 and the grate 21 are connected by providing mutually matching annular grooves. An ash blocking ring 18 is arranged on the contact surface of the rake 19 and the grate 21 to improve the sealing effect and prevent the radioactive organic waste liquid from leaking. A sliding bearing 24 is arranged between the central through hole of the perforated strainer 21 and the stirring shaft 4, and the stirring end of the stirring shaft 4 passes through the central through holes of the rakes 19 and the perforated strainer 21 and is rotatably supported in the central through hole of the perforated strainer 21 through the sliding bearing 24. The stirring end of the stirring shaft 4 is also sleeved with a support ring 20 and a sixth shaft sleeve 33, the support ring 20 and the sixth shaft sleeve 33 are both positioned at the central through hole of the grate 21, the upper end of the support ring 20 is in contact connection with the rake 19, and the lower end of the support ring 20 is in contact connection with the upper end of the sixth shaft sleeve 33. The end part of the stirring end of the stirring shaft 4 is also provided with a nut, the sliding bearing 24 is pressed in the central hole of the lower bottom plate through the nut, and the sliding bearing 24 is limited through the lower end surface of the sixth shaft sleeve 33 and the nut. A seventh shaft sleeve is arranged between the sliding bearing 24 and the grate 21, and the lower end of the seventh shaft sleeve is fixed on the grate 21 by bolts and the like.
In this embodiment, one or more stirring paddles 17 are fixedly sleeved on the part of the stirring shaft 44 located in the stirring container. For guaranteeing stirring rake 17 atress homogeneity, each stirring rake 17 mutual independence sets up alone, and stirring rake 17 is dividing into the multistage along the (mixing) shaft axial promptly to reduce the internal stress that stirring rake 17 received in the operation process, the thermal stress that stirring rake 17 received when reducing high temperature stirring simultaneously.
In this embodiment, the rolling bearing 10 and the sliding bearing 24 are both made of a high-temperature-resistant self-lubricating powder metallurgy alloy material to replace a conventional coating-type high-temperature-resistant bearing, so that the problems of failure of the stirring device caused by fragments generated by abrasion and the like are avoided. For example, the stirring device can be made of tungsten-nickel-titanium alloy materials, can normally work and keep self-lubricating property even under the working conditions of high temperature of 500 ℃ and radioactivity, and ensures the operational reliability of the stirring device.
In the stirring device of the present embodiment, the components including the body 16, the upper cover plate 13, the lower bottom plate, the stirring shaft 44, the base 11, the bracket 54, the stirring paddle 17, the respective bushings, and the like are preferably made of an alloy material having high temperature resistance and radiation resistance, such as inconel625 alloy material.
In this embodiment, the stirring device further comprises metal balls, preferably stainless steel balls, which are placed in the stirring container, so that during stirring, solid scabbing generated by the organic waste liquid can be prevented through friction among the stainless steel balls, and the stainless steel balls can also be used as a heat transfer carrier to increase the heat transfer effect. The diameter of the stainless steel ball is preferably 22-25 mm.
The operation process of the device is as follows: the output shaft of the motor drives the connecting shaft yoke 26 to movably drive the universal yoke 2 and the stirring shaft 4 to rotate together, media such as radioactive organic waste liquid in the stirring container are stirred by the rotation of the stirring paddle 17 on the paddle plate shaft, stirring is carried out, solid scabs generated by waste liquid reaction are adhered to the stainless steel balls, and under the stirring action of the stirring paddle, the stainless steel balls are uniformly and quickly dispersed and mutually extruded and rubbed to enable the solid scabs to be crushed, so that the temperature operation of the stirring device is ensured. In the stirring process, the effort of stainless steel ball to the stirring rake passes through on the (mixing) shaft 4 transmits universal yoke 2, the power that universal yoke 2 received is reapplied to the second magnet of magnetic suspension bearing assembly 3, the first magnet is used with the ascending power of axial to the effect of rethread magnetic force, convert the relative rotation that does not have friction, thereby reduce (mixing) shaft 4 rotational torque greatly, and transmit the axial force who bears to support 5, transmit base 11 by support 5, finally transmit on stirring container's upper cover plate 13 again, make like this and (mixing) shaft 4 directly continuous first axle sleeve 14 need not bear the power of axial decurrent, thereby improve agitating unit's stability. Meanwhile, an upward acting force can be generated through the mutual repulsion magnetic action of the first magnet and the second magnet, and the balance is realized with the axial upward downward acting force, so that the stable work, namely the axial positioning, of the stirring shaft 4 at the preset balance position is ensured.
When the downward acting force of the stirring medium (organic waste liquid and stainless steel balls) on the stirring shaft 44 is instantaneously increased, the stirring paddle 17 drives the stirring shaft 44 to move axially downwards, the stirring shaft 44 drives the universal yoke 2 to move axially downwards, the universal yoke 2 drives the second magnet to move axially downwards, the second magnet moves axially downwards to reduce the gap between the second magnet and the first magnet, the gap is reduced to rapidly increase the repulsive magnetic force between the first magnet and the second magnet, the counter acting force to the upward acting force of the stirring shaft 4 in the axial direction is generated, and the balance of the axial force is rapidly realized, so that the stirring shaft 4 is prevented from further moving axially downwards.
When the axial downward acting force on the stirring shaft 4 is instantaneously reduced, the repulsive magnetic force between the first magnet and the second magnet drives the second magnet and the stirring shaft 4 to axially move upwards, the second magnet axially moves upwards to increase the gap between the second magnet and the first magnet, so that the repulsive magnetic force between the second magnet and the first magnet is rapidly reduced, and the balance of the axial upward force with the axial upward acting force of the stirring shaft 4 is rapidly realized, thereby preventing the second magnet from further axially moving upwards.
In the embodiment, the non-contact axial positioning of the stirring shaft 4 is realized by the way that the gap between the first magnet and the second magnet is automatically adjusted along with the stress change of the stirring shaft 4, and the damage of the generated axial downward acting force on a shaft sleeve, a bearing and the like is avoided.
In addition, in the radial direction of the stirring shaft 4, the rolling bearing 10 and the sliding bearing 24 which are respectively arranged at the middle position and the stirring end position of the stirring shaft 4 are used for carrying out double-point radial positioning, and the upper pin 23 and the lower pin 23 are used for fixedly positioning the upper cover plate 13 and the lower bottom plate, so that accurate radial positioning limitation is formed, the radial deviation generated when the stirring device operates can be avoided, the stirring shaft 4 is ensured not to swing, the uniformity of radial stress of the stirring shaft 4 is ensured, the internal abrasion is reduced, and the stability of the device is improved.
The beneficial effects of this embodiment:
(1) the magnetic suspension bearing assembly is adopted, the axial force is converted into the relative rotation without friction force under the action of magnetic force, the rotation torque of the stirring shaft 4 is reduced, the axial downward acting force of the stirring shaft in the stirring process is overcome, the stirring shaft is accurately positioned in the axial direction, and the stable work of the stirring shaft at the preset balance position is ensured.
(2) Adopt antifriction bearing and sliding bearing to carry out the multiple spot restriction to the (mixing) shaft in the footpath to and increased about the round pin and carried out supplementary radial positioning restriction, in order to prevent to appear the swing and lead to the bearing atress inhomogeneous at the stirring in-process, cause frictional wear.
(3) The bearing made of the high-temperature-resistant self-lubricating alloy material is adopted to replace the traditional bearing sprayed with the wear-resistant layer, the problems of stirring failure and the like caused by coating fragments falling off due to bearing abrasion are avoided, and the service life is longer.
(4) Adopt nitrogen gas seal and multichannel sealing washer to seal, can reduce the risk that radioactive organic waste liquid reveals.
(5) The stirring paddle is arranged in a segmented and independent mode, so that internal stress and thermal stress applied in the stirring process can be reduced.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (9)
1. A high-temperature stirring device for the pyrolysis of radioactive organic waste liquid comprises a stirring container, a driving mechanism and a moving mechanism, wherein the stirring container comprises a container body, an upper cover plate and a lower bottom plate, the upper cover plate is fixedly arranged at the upper end of the container body, the lower bottom plate is fixedly arranged at the lower end of the container body,
the motion mechanism comprises a stirring shaft, a magnetic suspension bearing assembly, a connecting assembly, a base and a bracket,
the base is clamped at the central opening of the upper cover plate, and an inner hole of the base is provided with a rolling bearing;
the stirring shaft comprises a stirring end and a driving end, the stirring shaft penetrates through the rolling bearing and is rotatably supported in the base, so that the stirring end is positioned in the stirring container, and the driving end is connected with the driving mechanism through the connecting component;
the bracket is sleeved on the stirring shaft and is connected with the base;
the magnetic suspension bearing assembly is sleeved on the support, and the upper end of the magnetic suspension bearing assembly is fixedly connected with the connecting assembly.
2. The high-temperature stirring device for the pyrolysis of radioactive organic waste liquid according to claim 1, wherein the connection assembly comprises a universal yoke, a spline, a coupling yoke,
the universal yoke is sleeved on the driving end of the stirring shaft, the driving end is provided with a fastening nut, the spline is connected with the universal yoke, and a central hole matched with the fastening nut is formed in the spline, so that the fastening nut is clamped in the central hole of the spline;
one end of the connecting shaft yoke is fixedly connected with the spline, and the other end of the connecting shaft yoke is connected with the driving structure.
3. The high-temperature stirring device for the pyrolysis of the radioactive organic waste liquid according to claim 2, wherein the magnetic suspension assembly comprises a first magnet and a second magnet, the first magnet and the second magnet are both of a circular ring structure with permanent magnets wrapped inside,
the first magnet is clamped on the support, the second magnet is fixedly connected with the universal yoke and rotates along with the universal yoke, and the magnetic polarities of the adjacent surfaces of the first magnet and the second magnet are the same.
4. The high-temperature stirring device for the pyrolysis of the radioactive organic waste liquid according to claim 1, further comprising a sealing mechanism, wherein the sealing mechanism is sleeved on the stirring shaft and is positioned between the base and the bracket,
the sealing mechanism adopts nitrogen gas for sealing and comprises a filler seat, a fifth shaft sleeve and a second filler,
the packing seat is connected to the base through a bolt and is connected with the lower end face of the support, the upper part of the packing seat is embedded in an inner hole in the lower part of the support, and a nitrogen interface is arranged on the packing seat;
the fifth shaft is sleeved between the packing seat and the stirring shaft, the packing is arranged in an annular space between the packing seat and the shaft sleeve, a gland is arranged on the upper portion of the packing, and the gland is fixed on the packing seat.
5. The high-temperature stirring apparatus for the pyrolysis of a radioactive organic waste liquid according to claim 1, wherein the lower cover plate includes rakes and grates,
the centers of the rakes and the grate are provided with matched through holes, and the stirring end of the stirring shaft penetrates through the central through holes of the rakes and the grate;
the rakes and the grates are connected through annular grooves which are matched with each other.
6. The high-temperature stirring device for the pyrolysis of the radioactive organic waste liquid according to claim 5, wherein a sliding bearing is arranged between the central through hole of the grate and the stirring shaft, and the stirring end of the stirring shaft passes through the central through holes of the rake and the grate and is rotatably supported in the central through hole of the grate through the sliding bearing.
7. The high-temperature stirring device for the pyrolysis of the radioactive organic waste liquid according to claim 6, wherein the rolling bearing and the sliding bearing are made of tungsten-nickel-titanium alloy materials.
8. The high-temperature stirring device for the pyrolysis of the radioactive organic waste liquid according to any one of claims 1 to 7, wherein a plurality of stirring paddles are arranged on the stirring end of the stirring shaft, and the stirring paddles are arranged independently from each other.
9. The high-temperature stirring device for the pyrolysis of the radioactive organic waste liquid according to any one of claims 1 to 7, wherein the device body, the upper cover plate, the lower bottom plate, the stirring shaft, the base, the bracket and the stirring paddle are made of inconel625 alloy material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338175.9A CN111644110A (en) | 2020-04-26 | 2020-04-26 | A high temperature agitating unit for pyrolysis of radioactive organic waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338175.9A CN111644110A (en) | 2020-04-26 | 2020-04-26 | A high temperature agitating unit for pyrolysis of radioactive organic waste liquid |
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| CN111644110A true CN111644110A (en) | 2020-09-11 |
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| CN202010338175.9A Pending CN111644110A (en) | 2020-04-26 | 2020-04-26 | A high temperature agitating unit for pyrolysis of radioactive organic waste liquid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003340254A (en) * | 2002-05-29 | 2003-12-02 | Aisin Seiki Co Ltd | Noncontact rotary apparatus |
| CN205127792U (en) * | 2015-11-25 | 2016-04-06 | 温州市中伟磁传密封设备厂 | Totally enclosed magnetic suspension side agitating unit |
| CN108067150A (en) * | 2018-01-25 | 2018-05-25 | 宝鸡泰华磁机电技术研究所有限公司 | For the permanent magnet suspension blender of high temperature heavy load operating mode |
| CN208018555U (en) * | 2018-02-02 | 2018-10-30 | 中国核电工程有限公司 | Radioactive liquid waste blender |
| CN109603657A (en) * | 2019-01-22 | 2019-04-12 | 宝鸡泰华磁机电技术研究所有限公司 | Without the horizontal mixing agitator of axle envelope permanent-magnet type |
| CN209464943U (en) * | 2019-01-22 | 2019-10-08 | 宝鸡泰华磁机电技术研究所有限公司 | Pyrolytic incineration method separates tributyl phosphate-kerosene pyrolysis rabble furnace |
-
2020
- 2020-04-26 CN CN202010338175.9A patent/CN111644110A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003340254A (en) * | 2002-05-29 | 2003-12-02 | Aisin Seiki Co Ltd | Noncontact rotary apparatus |
| CN205127792U (en) * | 2015-11-25 | 2016-04-06 | 温州市中伟磁传密封设备厂 | Totally enclosed magnetic suspension side agitating unit |
| CN108067150A (en) * | 2018-01-25 | 2018-05-25 | 宝鸡泰华磁机电技术研究所有限公司 | For the permanent magnet suspension blender of high temperature heavy load operating mode |
| CN208018555U (en) * | 2018-02-02 | 2018-10-30 | 中国核电工程有限公司 | Radioactive liquid waste blender |
| CN109603657A (en) * | 2019-01-22 | 2019-04-12 | 宝鸡泰华磁机电技术研究所有限公司 | Without the horizontal mixing agitator of axle envelope permanent-magnet type |
| CN209464943U (en) * | 2019-01-22 | 2019-10-08 | 宝鸡泰华磁机电技术研究所有限公司 | Pyrolytic incineration method separates tributyl phosphate-kerosene pyrolysis rabble furnace |
Non-Patent Citations (1)
| Title |
|---|
| 化工部设备设计技术中心站，陈乙崇 主编: "《搅拌设备设计》", 30 November 1985, 上海科学技术出版社 * |
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