CN111905935A - Prevent centrifuge of feed inlet jam - Google Patents

Prevent centrifuge of feed inlet jam Download PDF

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Publication number
CN111905935A
CN111905935A CN202010896323.9A CN202010896323A CN111905935A CN 111905935 A CN111905935 A CN 111905935A CN 202010896323 A CN202010896323 A CN 202010896323A CN 111905935 A CN111905935 A CN 111905935A
Authority
CN
China
Prior art keywords
centrifuge
pipe
diluting
stirring
water inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010896323.9A
Other languages
Chinese (zh)
Inventor
黄韧浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhangjiagang Lanniao Centrifuge Co ltd
Original Assignee
Zhangjiagang Lanniao Centrifuge Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhangjiagang Lanniao Centrifuge Co ltd filed Critical Zhangjiagang Lanniao Centrifuge Co ltd
Priority to CN202010896323.9A priority Critical patent/CN111905935A/en
Publication of CN111905935A publication Critical patent/CN111905935A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B11/00Feeding, charging, or discharging bowls
    • B04B11/04Periodical feeding or discharging; Control arrangements therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2322Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/83Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers being additionally moved radially, or oscillating about an axis perpendicular to the stirrer axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/85Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B11/00Feeding, charging, or discharging bowls
    • B04B11/04Periodical feeding or discharging; Control arrangements therefor
    • B04B11/05Base discharge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B15/00Other accessories for centrifuges
    • B04B15/06Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)

Abstract

The invention discloses a centrifuge capable of preventing a feed port from being blocked, which comprises a rack, wherein a centrifuge body is arranged on one side of the top of the rack, a diluting component is connected to the position of the feed port on one side of the centrifuge body, the diluting component comprises a diluting box, a stirring mechanism, a positioning frame, a discharge valve, a discharging pipe, a feeding hopper, a first water inlet pipe and an electromagnetic valve, the diluting box is fixed on one side of the top of the rack through the positioning frame at the four corner positions of the bottom, the stirring mechanism is arranged in the diluting box, one side of the bottom of the diluting box is connected with the feed port through the discharging pipe, and the feeding valve is arranged on the discharging pipe. The invention has novel structure and ingenious conception, and under the operation of the stirring mechanism, the material and the water are quickly mixed, so that the proportion of solid phase substances in the material can be reduced, the feed pipe of the centrifuge can be effectively prevented from being blocked, meanwhile, the raw material can be diluted, the separation difficulty is reduced, and the service life of the centrifuge is prolonged.

Description

Prevent centrifuge of feed inlet jam
Technical Field
The invention relates to the technical field of centrifuges, in particular to a centrifuge capable of preventing a feed inlet from being blocked.
Background
The horizontal centrifuge is used for intercepting solid particles in suspension liquid in the rotary drum by utilizing centrifugal force generated by the rotary drum rotating at high speed and automatically discharging the solid particles out of the centrifuge under the action of force; meanwhile, under the action of centrifugal force, liquid in the suspension is thrown out through the filter medium and the small holes of the rotary drum, so that the aim of liquid-solid separation and filtration is fulfilled. The horizontal centrifuge has incomparable price advantage of similar products, and the machine has the advantages of advanced design technology, stable performance, simple structure, convenient maintenance, small occupied area, automatic continuous work, large processing capacity and high utilization rate of raw materials. The horizontal centrifuge is mainly suitable for the industries of chemical industry, medicine, food, starch and the like.
In the process of separating raw materials by the horizontal centrifuge, certain larger solid particles in the raw materials can cause the blockage of a feeding pipe, so that the production efficiency is reduced, and the horizontal centrifuge can be seriously failed. Secondly, if the proportion of solid phase substances in the raw materials is high, the centrifuge is in a high-load operation state, the separation difficulty is increased, and the service life of the horizontal centrifuge is shortened. Therefore, it is necessary to design a centrifuge which prevents the blockage of the feed inlet.
Disclosure of Invention
Aiming at the situation and overcoming the defects of the prior art, the invention provides the centrifuge for preventing the feed inlet from being blocked, which has the advantages of novel structure and ingenious conception, under the operation of the stirring mechanism, the material is quickly mixed with water, the proportion of solid-phase substances in the material can be reduced, the feed pipe of the centrifuge can be effectively prevented from being blocked, meanwhile, the raw material can be diluted, the separation difficulty is reduced, and the service life of the centrifuge is prolonged.
In order to achieve the purpose, the invention provides the following technical scheme: a centrifuge for preventing a feed port from being blocked comprises a rack, wherein a centrifuge body is arranged on one side of the top of the rack, and a dilution assembly is connected to the position of the feed port on one side of the centrifuge body;
the utility model discloses a dilution assembly, including dilution box, rabbling mechanism, locating rack, bleeder valve, unloading pipe, feeding funnel, first inlet tube and solenoid valve, the dilution box is fixed in top one side of frame through the locating rack of four corner positions departments in bottom, the internally mounted of dilution box has rabbling mechanism, bottom one side of dilution box is passed through the unloading pipe and is connected with the feed inlet, install the feeding funnel on the unloading pipe, the feeding funnel is installed to top one side of dilution box, first inlet tube is installed to the top opposite side of dilution box, install the solenoid valve on the first inlet tube.
Preferably, rabbling mechanism includes gear motor, pivot, stirring leaf, (mixing) shaft, reciprocal lead screw, reciprocal slider, slide rail and waterproof motor, gear motor fixes the bottom inner wall center department at diluting the case, install the pivot that is located diluting the incasement portion on gear motor's the output, the slide rail is installed to the top symmetry of pivot, the internal rotation of slide rail is connected with reciprocal lead screw, the internally mounted of slide rail has the waterproof motor who is connected with the drive of reciprocal lead screw, the meshing is connected with the reciprocal slider of slip at the slide rail is inside on the reciprocal lead screw, the (mixing) shaft is installed to the bottom of reciprocal slider, install a plurality of stirring leaf on the (mixing) shaft.
Preferably, a flow sensor is installed on the first water inlet pipe.
Preferably, supporting legs are installed at four corner positions of the bottom of the rack, and elastic feet are installed at the bottoms of the supporting legs.
Preferably, the elasticity footing includes external thread connecting rod, base, capping and supporting spring, the top of base cup joints and is fixed with the capping, and is connected through supporting spring between capping and the base, the top center department of capping connects soon through external thread connecting rod and fixes the bottom center department at the supporting leg.
Preferably, a plurality of cleaning nozzles are installed at the top of the centrifuge body, the cleaning nozzles are connected with a main pipe through branch pipes, one end of the main pipe is connected with a second water inlet pipe, and a water inlet valve is installed on the second water inlet pipe.
Preferably, a discharging pipe is installed on one side of the bottom of the centrifuge body, and a vibration motor is installed on the discharging pipe.
The invention has the beneficial effects that:
1. the method comprises the following steps of enabling materials to be centrifugally separated to enter the dilution box through a feeding hopper, opening a stirring mechanism and an electromagnetic valve, introducing a certain amount of water through a first water inlet pipe, and enabling the materials to be rapidly mixed with the water under the operation of the stirring mechanism, so that the proportion of solid-phase substances in the materials can be reduced, the blockage of a feeding pipe of the centrifuge can be effectively avoided, the raw materials can be diluted, the separation difficulty is reduced, and the service life of the centrifuge is prolonged;
2. after water and materials are introduced into the diluting box, the speed reducing motor and the waterproof motor are arranged to work, the speed reducing motor works to drive the rotating shaft to rotate, so that the stirring shaft fixed at the top end of the rotating shaft is driven to rotate, the waterproof motor works to drive the reciprocating screw rod to rotate, so that the reciprocating slide block is driven to reciprocate left and right in the sliding rail, and then the stirring shaft is driven to reciprocate left and right, so that stirring dead corners can be avoided, and the stirring efficiency and the stirring quality are improved;
3. the water inlet valve is opened, so that water enters the main pipe through the second water inlet pipe and is sprayed out of the cleaning spray head through the branch pipe, the interior of the centrifuge body is cleaned, and the interior of the centrifuge body is conveniently and quickly cleaned;
4. through the vibrating motor work that sets up, drive the regional vibration of unloading pipe, can prevent that the material from blockking up in the regional department of unloading pipe, can promote discharging efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall plan structure of the present invention;
FIG. 2 is a schematic plan view of a diluting assembly according to the present invention;
FIG. 3 is a schematic plan view of the stirring mechanism of the present invention;
FIG. 4 is a schematic view of the elastic foot of the present invention;
reference numbers in the figures: 1. a frame; 2. supporting legs; 3. an elastic foot; 4. a dilution assembly; 5. a feed inlet; 6. a centrifuge body; 7. a main pipe; 8. a branch pipe; 9. cleaning the spray head; 10. a second water inlet pipe; 11. a water inlet valve; 12. a discharging pipe; 13. a vibration motor; 14. a dilution tank; 15. a stirring mechanism; 16. a positioning frame; 17. a discharge valve; 18. a discharging pipe; 19. feeding a hopper; 20. a first water inlet pipe; 21. an electromagnetic valve; 22. a flow sensor; 23. a reduction motor; 24. a rotating shaft; 25. stirring blades; 26. a stirring shaft; 27. a reciprocating screw rod; 28. a reciprocating slide block; 29. a slide rail; 30. a waterproof motor; 31. an externally threaded connecting rod; 32. a base; 33. covering; 34. supporting the spring.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 4.
As shown in fig. 1 to 4, the present invention provides the following technical solutions: a centrifuge for preventing a feed inlet from being blocked comprises a frame 1, wherein a centrifuge body 6 is installed on one side of the top of the frame 1, and a dilution assembly 4 is connected to a feed inlet 5 on one side of the centrifuge body 6;
the dilution assembly 4 comprises a dilution box 14, a stirring mechanism 15, a positioning frame 16, a discharge valve 17, a discharge pipe 18, a feeding hopper 19, a first water inlet pipe 20 and an electromagnetic valve 21, wherein the dilution box 14 is fixed on one side of the top of the rack 1 through the positioning frame 16 at the positions of four corners at the bottom, the stirring mechanism 15 is installed inside the dilution box 14, one side of the bottom of the dilution box 14 is connected with the feeding port 5 through the discharge pipe 18, the feeding valve 17 is installed on the discharge pipe 18, the feeding hopper 19 is installed on one side of the top of the dilution box 14, the first water inlet pipe 20 is installed on the other side of the top of the dilution box 14, the electromagnetic valve 21 is installed on the first water inlet pipe 20, materials needing centrifugal separation firstly enter the inside of the dilution box 14 through the feeding hopper 19, the stirring mechanism 15 and the electromagnetic valve 21 are opened, a certain amount of water is introduced through the first water, make material and water flash mixed, can reduce the shared proportion of solid phase thing in the material, can effectually avoid centrifuge's inlet pipe to be blockked up, can also dilute the raw materials simultaneously, reduce the separation degree of difficulty, extension centrifuge's life.
The stirring mechanism 15 comprises a speed reducing motor 23, a rotating shaft 24, stirring blades 25, a stirring shaft 26, a reciprocating screw rod 27, a reciprocating slide block 28, a slide rail 29 and a waterproof motor 30, the speed reducing motor 23 is fixed at the center of the inner wall of the bottom of the dilution tank 14, the rotating shaft 24 positioned in the dilution tank 14 is installed at the output end of the speed reducing motor 23, the slide rail 29 is symmetrically installed at the top of the rotating shaft 24, the reciprocating screw rod 27 is rotatably connected in the slide rail 29, the waterproof motor 30 in driving connection with the reciprocating screw rod 27 is installed in the slide rail 29, the reciprocating slide block 28 sliding in the slide rail 29 is connected on the reciprocating screw rod 27 in a meshing manner, the stirring shaft 26 is installed at the bottom of the reciprocating slide block 28, the stirring shaft 26 is provided with a plurality of stirring blades 25, after water and materials are guided into the dilution tank 14, the speed reducing motor 23 and, thereby drive the (mixing) shaft 26 of fixing at the pivot 24 top rotatory, and waterproof motor 30 work moreover, drives reciprocal lead screw 27 rotatory to drive reciprocal slider 28 and do left and right reciprocating motion in the inside of slide rail 29, drive the (mixing) shaft 26 and do left and right reciprocating motion then, can avoid appearing the stirring dead angle, promote stirring efficiency and stirring quality.
Install flow sensor 22 on the first inlet tube 20, through the flow sensor 22 who sets up, be convenient for monitor first inlet tube 20's inflow.
Supporting legs 2 are installed at four corner positions of the bottom of the frame 1, and elastic feet 3 are installed at the bottoms of the supporting legs 2.
Elastic footing 3 includes external screw thread connecting rod 31, base 32, cover 33 and supporting spring 34, the top of base 32 is cup jointed and is fixed with cover 33, and be connected through supporting spring 34 between cover 33 and the base 32, the top center department of cover 33 connects soon through external screw thread connecting rod 31 and fixes in the bottom center department of supporting leg 2, under supporting spring 34's effect, make cover 33 can be elastic telescopic motion on base 32, make it have good shock-absorbing function.
A plurality of cleaning spray heads 9 are installed at the top of the centrifuge body 6, the cleaning spray heads 9 are connected with the main pipe 7 through branch pipes 8, one end of the main pipe 7 is connected with a second water inlet pipe 10, a water inlet valve 11 is installed on the second water inlet pipe 10, the water inlet valve 11 is opened, water enters the inside of the main pipe 7 through the second water inlet pipe 10 and is sprayed out from the cleaning spray heads 9 through the branch pipes 8, the inside of the centrifuge body 6 is cleaned, and the rapid cleaning of the inside of the centrifuge body 6 is facilitated.
The discharging pipe 12 is installed on one side of the bottom of the centrifuge body 6, the vibrating motor 13 is installed on the discharging pipe 12, the vibrating motor 13 works to drive the discharging pipe 12 to vibrate in the area, materials can be prevented from being blocked in the area of the discharging pipe 12, and discharging efficiency can be improved.
When the device is used, materials needing centrifugal separation firstly enter the dilution box 14 through the feeding hopper 19, the stirring mechanism 15 and the electromagnetic valve 21 are opened, a certain amount of water is introduced through the arranged first water inlet pipe 20, and the materials and the water are quickly mixed under the operation of the stirring mechanism 15, so that the proportion of solid-phase substances in the materials can be reduced, the blockage of a feeding pipe of the centrifugal machine can be effectively avoided, meanwhile, the raw materials can be diluted, the separation difficulty is reduced, and the service life of the centrifugal machine is prolonged;
after water and materials are introduced into the diluting box 14, the speed reducing motor 23 and the waterproof motor 30 are arranged to work, the speed reducing motor 23 works to drive the rotating shaft 24 to rotate, so that the stirring shaft 26 fixed at the top end of the rotating shaft 24 is driven to rotate, the waterproof motor 30 works to drive the reciprocating screw rod 27 to rotate, so that the reciprocating slide block 28 is driven to reciprocate left and right in the slide rail 29, and then the stirring shaft 26 is driven to reciprocate left and right, so that stirring dead corners can be avoided, and the stirring efficiency and the stirring quality are improved;
the water inlet valve 11 is opened, so that water enters the main pipe 7 through the second water inlet pipe 10 and is sprayed out of the cleaning spray head 9 through the branch pipe 8, the interior of the centrifuge body 6 is cleaned, and the interior of the centrifuge body 6 is conveniently and quickly cleaned;
through the work of vibrating motor 13 that sets up, drive the regional vibration of the department of unloading pipe 12, can prevent that the material from blockking up in the regional department of unloading pipe 12, can promote discharging efficiency.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a prevent centrifuge of feed inlet jam, includes frame (1), its characterized in that: a centrifuge body (6) is mounted on one side of the top of the rack (1), and a dilution assembly (4) is connected to a feed inlet (5) on one side of the centrifuge body (6);
dilution subassembly (4) are including diluting case (14), rabbling mechanism (15), locating rack (16), bleeder valve (17), unloading pipe (18), loading hopper (19), first inlet tube (20) and solenoid valve (21), top one side in frame (1) is fixed through locating rack (16) of four corner positions departments in bottom in diluting case (14), the internally mounted of diluting case (14) has rabbling mechanism (15), bottom one side of diluting case (14) is connected with feed inlet (5) through unloading pipe (18), install loading valve (17) on unloading pipe (18), loading hopper (19) are installed to top one side of diluting case (14), first inlet tube (20) are installed to the top opposite side of diluting case (14), install solenoid valve (21) on first inlet tube (20).
2. The centrifuge of claim 1, wherein the centrifuge further comprises: the stirring mechanism (15) comprises a speed reducing motor (23), a rotating shaft (24), a stirring blade (25), a stirring shaft (26), a reciprocating screw rod (27), a reciprocating slide block (28), a slide rail (29) and a waterproof motor (30), wherein the speed reducing motor (23) is fixed at the center of the inner wall of the bottom of the diluting box (14), the rotating shaft (24) positioned inside the diluting box (14) is installed at the output end of the speed reducing motor (23), the slide rail (29) is symmetrically installed at the top of the rotating shaft (24), the reciprocating screw rod (27) is rotatably connected inside the slide rail (29), the waterproof motor (30) in driving connection with the reciprocating screw rod (27) is installed inside the slide rail (29), the reciprocating slide block (28) which slides inside the slide rail (29) is engaged and connected on the reciprocating screw rod (27), the stirring shaft (26) is installed at the bottom of the reciprocating slide block (, the stirring shaft (26) is provided with a plurality of stirring blades (25).
3. The centrifuge of claim 1, wherein the centrifuge further comprises: and a flow sensor (22) is arranged on the first water inlet pipe (20).
4. The centrifuge of claim 1, wherein the centrifuge further comprises: supporting legs (2) are installed at four corner positions of the bottom of the frame (1), and elastic bottom feet (3) are installed at the bottoms of the supporting legs (2).
5. The centrifuge of claim 4, wherein the centrifuge further comprises: elasticity footing (3) include external screw thread connecting rod (31), base (32), cover (33) and supporting spring (34), the top of base (32) is cup jointed and is fixed with cover (33), and is connected through supporting spring (34) between cover (33) and base (32), the top center department of cover (33) connects soon through external screw thread connecting rod (31) and fixes the bottom center department at supporting leg (2).
6. The centrifuge of claim 1, wherein the centrifuge further comprises: a plurality of cleaning spray heads (9) are installed at the top of the centrifuge body (6), the cleaning spray heads (9) are connected with a main pipe (7) through branch pipes (8), one end of the main pipe (7) is connected with a second water inlet pipe (10), and a water inlet valve (11) is installed on the second water inlet pipe (10).
7. The centrifuge of claim 1, wherein the centrifuge further comprises: a discharging pipe (12) is installed on one side of the bottom of the centrifuge body (6), and a vibration motor (13) is installed on the discharging pipe (12).
CN202010896323.9A 2020-08-31 2020-08-31 Prevent centrifuge of feed inlet jam Withdrawn CN111905935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010896323.9A CN111905935A (en) 2020-08-31 2020-08-31 Prevent centrifuge of feed inlet jam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010896323.9A CN111905935A (en) 2020-08-31 2020-08-31 Prevent centrifuge of feed inlet jam

Publications (1)

Publication Number Publication Date
CN111905935A true CN111905935A (en) 2020-11-10

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CN202010896323.9A Withdrawn CN111905935A (en) 2020-08-31 2020-08-31 Prevent centrifuge of feed inlet jam

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117339771A (en) * 2023-12-04 2024-01-05 清控环境(北京)有限公司 Centrifugal separation equipment for oil sludge treatment and separation method thereof
CN117861875A (en) * 2024-03-12 2024-04-12 菏泽学院 Centrifugal equipment is used in preparation of plant growth regulator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117339771A (en) * 2023-12-04 2024-01-05 清控环境(北京)有限公司 Centrifugal separation equipment for oil sludge treatment and separation method thereof
CN117339771B (en) * 2023-12-04 2024-02-23 清控环境(北京)有限公司 Centrifugal separation equipment for oil sludge treatment and separation method thereof
CN117861875A (en) * 2024-03-12 2024-04-12 菏泽学院 Centrifugal equipment is used in preparation of plant growth regulator
CN117861875B (en) * 2024-03-12 2024-05-17 菏泽学院 Centrifugal equipment is used in preparation of plant growth regulator

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Application publication date: 20201110

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