Disc centrifuge with ultrasonic cleaning function

Abstract

The invention relates to the technical field of disc centrifuges, in particular to a disc centrifuge with an ultrasonic cleaning function, which comprises a centrifuge component and a cleaning component, the centrifuge component comprises a casing and a drum, and an annular cavity is formed between the casing and the drum; the cleaning assembly comprises a plurality of ultrasonic vibrators distributed in the circumferential direction of the rotary drum at intervals and a telescopic mechanism used for driving the ultrasonic vibrators to be attached to or away from the rotary drum. By combining the ultrasonic technology, a strong cavitation effect is generated, a large number of tiny bubbles are generated in liquid, residues and pollutants can be removed, internal parts of the disc centrifuge can be cleaned within a short time, the cleaning efficiency is high, the surfaces of the parts cannot be abraded, and the service life of the disc centrifuge is prolonged. And when the telescopic mechanism stretches, the ultrasonic vibrator is pressed on the outer wall face of the rotary drum, ultrasonic cleaning is achieved, the cleaning efficiency is improved, when the telescopic mechanism is shortened, the ultrasonic transducer is tightly attached to the inner wall of the shell, rotation work of the disc type centrifugal machine is not hindered, equipment vibration is reduced, and the fault rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of disc centrifuges, and in particular to a disc centrifuge with an ultrasonic cleaning function. Background Art

[0002] As a separation equipment, disc centrifuge is widely used in chemical, petroleum, pharmaceutical, food and other industries with its advantages of high precision, high speed and high separation efficiency. Taking the solid-liquid two-phase separation process as an example, the disc centrifuge rotates at high speed to generate a centrifugal field. The solid particles rotate and deposit in the drum area according to the different proportions of the light and heavy phases, and the light phase flows upward along the disc surface and is discharged from the light liquid port, thus completing the entire solid-liquid separation. After a long period of operation, especially when dealing with high-viscosity or easily scaled materials, the disc surface, the inner wall of the drum and other parts of the disc centrifuge are prone to dirt, affecting the separation effect. With the accumulation of sediment, severe blockages may occur, leading to equipment failure. Therefore, it is necessary to regularly clean the inside of the disc centrifuge to meet the needs of efficient production.

[0003] The cleaning method of traditional disc centrifuge usually requires manual disassembly and cleaning, which mainly includes the following steps: ① Power off: shut down the equipment and turn off the power. ② Disassembly: disassemble the disc, drum, seal and other parts according to the equipment instruction manual. ③ Cleaning: use a brush or high-pressure water gun with special cleaning fluid to clean the disassembled parts, especially the surface of the disc, the inner wall of the drum and other places where dirt is easily accumulated. ④ Drying: dry naturally or wipe dry with flannel. ⑤ Reassembly: assemble all parts as they were.

[0004] The existing disc centrifuge cleaning requires manual disassembly and cleaning, which increases the workload, and the disassembly and cleaning is time-consuming and laborious; frequent disassembly and assembly of the centrifuge affects the sealing performance of the centrifuge and reduces the service life of the equipment; the manual cleaning effect is not thorough, especially for stubborn dirt, there is residue; at the same time, manual cleaning uses external tools, which will damage the disc surface and other components, causing scratches or wear on the surface, affecting the separation effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the problems in the prior art that the disc centrifuge needs to be manually disassembled and cleaned, which increases the workload, the cleaning effect is not thorough, and the frequent disassembly and assembly of the centrifuge affects the sealing performance of the centrifuge and reduces the service life of the equipment, a disc centrifuge with ultrasonic cleaning function is now provided.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a disc centrifuge with ultrasonic cleaning function comprises:

[0007] The centrifuge assembly comprises a casing and a drum rotatably mounted inside the casing, an annular chamber is formed between the inner peripheral wall of the casing and the outer peripheral wall of the drum, and the drum is provided with a feed inlet and a slag discharge outlet communicated with the inner cavity thereof;

[0008] And a cleaning component, which is arranged in the annular chamber, includes a plurality of ultrasonic vibrators spaced apart along the circumference of the drum and a telescopic mechanism for driving the ultrasonic vibrators to fit into or away from the drum, so as to clean the inside of the drum when the ultrasonic vibrators fit into the drum.

[0009] Furthermore, the housing is provided with a liquid inlet and a liquid outlet communicated with the annular chamber, so as to form a liquid environment in the annular chamber for the ultrasonic vibrator to work.

[0010] Furthermore, the ultrasonic vibrators are divided into several groups along the circumference of the drum, and each group of ultrasonic vibrators is fixed by an arc-shaped pressing plate and a telescopic mechanism.

[0011] Furthermore, there are several ultrasonic vibrators in each group, and the several ultrasonic vibrators in each group are distributed at intervals along the axial direction and circumferential direction of the drum.

[0012] Furthermore, liquid level sensors are installed in the inner cavity of the drum and the annular chamber.

[0013] Furthermore, a nozzle is installed on the liquid inlet.

[0014] Furthermore, the telescopic mechanism is an electric push rod.

[0015] Furthermore, the centrifuge assembly also includes a distributor located inside the drum, a disc located between an outer wall of the distributor and an inner wall of the drum, and a disc cover located above the disc.

[0016] Furthermore, it also includes a washing liquid tank for storing washing liquid, a washing liquid collecting tank for collecting washing liquid after washing is completed, an inlet pipeline connected between the washing liquid tank and the disc centrifuge, a liquid outlet pipeline connected between the disc centrifuge and the washing liquid collecting tank, and a reflux pipeline connected between the washing liquid collecting tank and the washing liquid tank, the inlet pipeline is sequentially installed with an inlet valve, a centrifugal pump, a washing liquid pressure gauge and a water inlet flow meter along the flow direction of the washing liquid, and the outlet pipeline is sequentially installed with a drainage pressure gauge, a drainage flow meter and a drainage valve along the flow direction of the washing liquid.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention combines ultrasonic technology to produce a strong cavitation effect, generating a large number of tiny bubbles in the liquid, which can remove residues and pollutants, and can clean the internal parts of the disc centrifuge in a short time with high cleaning efficiency without causing wear on the surface of the parts.

[0019] (2) The cleaning process of the present invention is carried out in a closed space, and there is no need to frequently disassemble the disc centrifuge for cleaning, thereby ensuring the sealing performance of the equipment and extending the service life of the equipment.

[0020] (3) When the telescopic mechanism of the present invention is extended, the ultrasonic vibrator is pressed against the outer wall of the drum, thereby achieving ultrasonic cleaning and improving the cleaning efficiency; when it is shortened, the ultrasonic transducer is pressed against the inner wall of the shell, which does not hinder the rotation of the disc centrifuge, reduces equipment vibration, and reduces the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 A top view of the present invention;

[0024] Figure 3 It is a work flow chart;

[0025] Figure 4 This is a diagram of the washing liquid circulation system;

[0026] In the figure:

[0027] 100. Disc centrifuge; 1. Casing; 101. Liquid inlet; 102. Liquid outlet; 103. Annular chamber; 104. Nozzle; 2. Drum; 201. Feed inlet; 202. Slag outlet; 3. Ultrasonic vibrator; 4. Telescopic mechanism; 5. Arc-shaped pressure plate; 6. Distributor; 7. Disc; 8. Disc cover; 9. Rotary drive mechanism; 10. Washing liquid tank; 11. Washing liquid collecting tank; 12. Liquid inlet pipeline; 13. Liquid outlet pipeline; 14. Reflux pipeline; 15. Liquid inlet valve; 16. Centrifugal pump; 17. Washing liquid pressure gauge; 18. Water inlet flow meter; 19. Drainage pressure gauge; 20. Drainage flow meter; 21. Drainage valve. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner only, and therefore only show the components related to the present invention, and directions and references such as up, down, left, right, etc. may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0029] Embodiment 1:

[0030] Figure 1 and Figure 2As shown, the present invention is a disc centrifuge with ultrasonic cleaning function, comprising:

[0031] The centrifuge assembly comprises a casing 1 and a drum 2 rotatably mounted inside the casing 1, the drum 2 being driven by a rotary drive mechanism 9 located at the bottom thereof, an annular chamber 103 being formed between the inner peripheral wall of the casing 1 and the outer peripheral wall of the drum 2, and the drum 2 being provided with a feed port 201 and a slag discharge port 202 communicating with the inner cavity thereof;

[0032] And a cleaning assembly, which is arranged in the annular chamber 103, includes a plurality of ultrasonic vibrators 3 spaced apart along the circumference of the drum 2 and a telescopic mechanism 4 for driving the ultrasonic vibrators 3 to fit or move away from the drum 2, so as to clean the inside of the drum 2 when the ultrasonic vibrators 3 fit the drum 2. The cleaning liquid in the washing liquid tank 10 enters from the feed port 201, and the dirt after cleaning is discharged from the slag discharge port 202. The cleaning liquid used in this solution is usually water or a solution containing a small amount of solvent. The cleaning liquid discharged after cleaning can be recycled, which reduces the use of chemical reagents, has less residue, and is more environmentally friendly.

[0033] When the telescopic mechanism 4 is extended, the ultrasonic vibrator 3 on it is pressed against the outer wall of the drum 2, and the ultrasonic vibrator 3 is in contact with the drum 2. The ultrasonic vibrator 3 is connected to the ultrasonic generator, and the ultrasonic generator can control the ultrasonic vibrator 3 to vibrate in a variety of ways, and can adjust the vibration frequency, vibration time and vibration interval, etc., and perform vibration washing in a targeted manner for key washing areas for different materials. The ultrasonic generator provides ultrasonic energy to the ultrasonic vibrator 3 during operation, and it converts electrical energy into high-frequency alternating current signals. The ultrasonic vibrator 3 mainly converts ultrasonic signals into high-intensity mechanical vibration signals and transmits them to the liquid through the drum 2. Ultrasonic waves generate an all-round three-dimensional wave field, which generates cavitation in the liquid and produces a large number of tiny bubbles. With the action of ultrasonic waves, the bubbles shrink rapidly and continuously impact the surfaces of the drum 2 and the disc 7, eventually causing the dirt to peel off and be discharged from the slag discharge port 202, thereby achieving cleaning inside the centrifuge. The diameter and position of the generated bubbles are variable, and bubbles of different sizes can penetrate into dead corners for cleaning, such as cleaning the gaps between the ribs and the disc 7, making the cleaning more thorough without dead corners. When shortened, the ultrasonic vibrator 3 is separated from the outer wall of the drum 2 and is close to the inner wall of the casing 1, which does not hinder the rotation of the disc centrifuge, reduces equipment vibration, and reduces the failure rate. The centrifuge is mainly in contact with liquid and bubbles, and will not cause damage to internal parts.

[0034] In some examples, the housing 1 is provided with a liquid inlet 101 and a liquid discharge port 102 connected to the annular chamber 103, so as to form a liquid environment for the ultrasonic vibrator 3 to work in the annular chamber 103; when the telescopic mechanism 4 drives the ultrasonic vibrator 3 to move in the direction of the drum 2 to clean the inside of the drum 2, the dirt is discharged from the slag discharge port 202 to the annular chamber 103, and finally discharged from the liquid discharge port 102, and the dirt discharge process is not very thorough. After long-term operation, dirt will accumulate in the annular chamber 103. At this time, the cleaning liquid is introduced through the liquid inlet 101, and the ultrasonic vibrator 3 is started, so that the inside of the annular chamber 103 can be cleaned, that is, the ultrasonic vibrator 3 can not only clean the inside of the drum 2 through the telescopic mechanism 4, but also clean the outside of the drum 2.

[0035] In some examples, the ultrasonic vibrators 3 are divided into several groups along the circumference of the drum 2, and each group of ultrasonic vibrators 3 is fixed to the telescopic mechanism 4 through an arc pressure plate 5; when the telescopic mechanism 4 drives the ultrasonic vibrators 3 to move toward the drum 2 and is close to the drum 2, two adjacent arc pressure plates 5 fit together to form a complete circular ring structure to provide stable support for the ultrasonic vibrators 3; when the telescopic mechanism 4 drives the ultrasonic vibrators 3 to move toward the drum 2, two adjacent arc pressure plates 5 move away from each other, and the ultrasonic vibrators 3 are installed on the arc pressure plates 5, which are easy to disassemble, maintain and replace.

[0036] In some examples, there are several ultrasonic vibrators 3 in each group, and the several ultrasonic vibrators 3 in each group are spaced apart along the axial direction and circumferential direction of the rotating drum 2 . The multiple ultrasonic vibrators 3 can generate an omnidirectional ultrasonic field to the rotating drum 2 .

[0037] In some examples, the inner cavity of the drum 2 and the annular chamber 103 are both equipped with liquid level sensors, which are used to monitor the liquid level positions of the inner cavity of the drum 2 and the annular chamber 103, respectively. The liquid level sensor is connected to the controller, and the starting liquid level a is set in the controller. The actual liquid level b monitored by the liquid level sensor is compared with the starting liquid level a. If the actual liquid level b is greater than or equal to the starting liquid level a, the ultrasonic generator is started. On the contrary, if the actual liquid level b is less than the starting liquid level a, the ultrasonic generator is turned off to avoid the ultrasonic vibrator 3 being unloaded and prevent malfunctions. The work flow diagram is as follows: Figure 3 shown.

[0038] In some examples, the liquid inlet 101 is equipped with a nozzle 104, and the opening and closing combination of each nozzle 104 is precisely controlled by a controller to adjust the opening and closing ratio of each nozzle 104 to achieve the effect of precise control of local flow, and finally achieve focused cleaning of the slag discharge port 202.

[0039] In some examples, the telescopic mechanism 4 is an electric push rod.

[0040] In some examples, the centrifuge assembly further includes a distributor 6 located inside the drum 2 , a disc 7 located between an outer wall of the distributor 6 and an inner wall of the drum 2 , and a disc cover 8 located above the disc 7 .

[0041] In some examples, it also includes a washing liquid tank 10 for storing washing liquid, a washing liquid collecting tank 11 for collecting washing liquid after washing, an inlet pipeline 12 connected between the washing liquid tank 10 and the disc centrifuge, a liquid outlet pipeline 13 connected between the disc centrifuge and the washing liquid collecting tank 11, and a reflux pipeline 14 connected between the washing liquid collecting tank 11 and the washing liquid tank 10, the inlet pipeline 12 is sequentially installed with an inlet valve 15, a centrifugal pump 16, a washing liquid pressure gauge 17 and a water inlet flow meter 18 along the flow direction of the washing liquid, and the outlet pipeline 13 is sequentially installed with a drainage pressure gauge 19, a drainage flow meter 20 and a drainage valve 21 along the flow direction of the washing liquid.

[0042] The controller is electrically connected to the liquid inlet valve 15, the drain valve 21, the ultrasonic vibrator 3 and the telescopic mechanism 4. When cleaning, first determine the washing area, the inside of the drum 2, the outside of the drum 2 or a specific area of ​​the two, open the liquid inlet valve 15, and the cleaning liquid enters the inner cavity of the drum 2 or the annular chamber 103 through the centrifugal pump 16, the washing liquid pressure gauge 17 and the water inlet flow meter 18 in turn. After the liquid level sensor monitors that the liquid level reaches the predetermined value, the ultrasonic generator is started to start cleaning. After the cleaning is completed, open the drain valve 21, and the cleaning liquid will enter the washing liquid collection tank 11 through the drainage pressure gauge 19 and the drainage flow meter 20 in turn. This solution integrates an automatic control system. Through the controller, the ultrasonic cleaning module and the washing liquid circulation system are controlled according to the actual production conditions, saving maintenance time and cost, and improving the automation level of the equipment.

[0043] Working process:

[0044] (1) The cleaning liquid stored in the cleaning liquid tank 10 is injected into the drum 2 through the feed port 201 or injected into the annular chamber 103 through the nozzle 104;

[0045] (2) After ensuring that the cleaning liquid submerges the liquid level sensor, the controller controls the telescopic mechanism 4 to extend so that the ultrasonic vibrator 3 contacts the drum 2, and then starts the ultrasonic generator. The ultrasonic vibrator 3 converts electrical energy into mechanical vibration, which is transmitted to the surface of the drum 2 and the disc 7 through the cleaning liquid;

[0046] (3) The cavitation effect of ultrasound causes dirt to fall off the surface and be carried away by the cleaning fluid;

[0047] (4) For a certain key washing area, the controller controls the extension and retraction of a single or multiple sets of telescopic mechanisms 4 in the area, and the ultrasonic vibrator 3 is vibrated at intervals to increase the vibration frequency and the vibration time, so as to achieve key washing;

[0048] (5) After cleaning is completed, the drain valve 21 is opened. When the actual liquid level is lower than the starting liquid level, the ultrasonic generator is turned off and the telescopic mechanism 4 is reset;

[0049] (6) The washing liquid is stored in the washing liquid collection tank 11 and can be continuously injected into the washing liquid tank 10 to achieve recycling.

[0050] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A disc centrifuge with ultrasonic cleaning function, characterized in that: include: A centrifuge assembly, comprising a casing (1) and a drum (2) rotatably mounted inside the casing (1), an annular chamber (103) being formed between the inner peripheral wall of the casing (1) and the outer peripheral wall of the drum (2), and the drum (2) being provided with a feed inlet (201) and a slag discharge outlet (202) communicating with its inner cavity; and a cleaning assembly, which is arranged in an annular chamber (103) and comprises a plurality of ultrasonic vibrators (3) spaced apart along the circumference of a rotating drum (2) and a telescopic mechanism (4) for driving the ultrasonic vibrators (3) to fit into or away from the rotating drum (2), so as to clean the interior of the rotating drum (2) when the ultrasonic vibrators (3) fit into the rotating drum (2).

2. A disc centrifuge with ultrasonic cleaning function according to claim 1, characterized in that: The housing (1) is provided with a liquid inlet (101) and a liquid outlet (102) which are in communication with the annular chamber (103), so as to form a liquid environment in the annular chamber (103) for the ultrasonic vibrator (3) to work.

3. The disc centrifuge with ultrasonic cleaning function according to claim 1, characterized in that: The ultrasonic vibrators (3) are divided into a plurality of groups along the circumference of the rotating drum (2), and each group of ultrasonic vibrators (3) is fixed via an arc-shaped pressing plate (5) and a telescopic mechanism (4).

4. The disc centrifuge with ultrasonic cleaning function according to claim 3, characterized in that: There are a plurality of ultrasonic vibrators (3) in each group, and the plurality of ultrasonic vibrators (3) in each group are distributed at intervals along the axial direction and the circumferential direction of the rotating drum (2).

5. The disc centrifuge with ultrasonic cleaning function according to claim 2, characterized in that: Liquid level sensors are installed in the inner cavity of the drum (2) and the annular chamber (103).

6. The disc centrifuge with ultrasonic cleaning function according to claim 2, characterized in that: A nozzle (104) is installed on the liquid inlet (101).

7. The disc centrifuge with ultrasonic cleaning function according to claim 1, characterized in that: The telescopic mechanism (4) is an electric push rod.

8. The disc centrifuge with ultrasonic cleaning function according to claim 1, characterized in that: The centrifuge assembly further comprises a distributor (6) located inside the drum (2), a disc (7) located between the outer wall of the distributor (6) and the inner wall of the drum (2), and a disc cover (8) located above the disc (7).

9. The disc centrifuge with ultrasonic cleaning function according to claim 1, characterized in that: The invention also comprises a washing liquid tank (10) for storing washing liquid, a washing liquid collecting tank (11) for collecting washing liquid after washing, a liquid inlet pipeline (12) connected between the washing liquid tank (10) and the disc centrifuge (100), a liquid outlet pipeline (13) connected between the disc centrifuge (100) and the washing liquid collecting tank (11), and a return pipeline (14) connected between the washing liquid collecting tank (11) and the washing liquid tank (10), wherein the liquid inlet pipeline (12) is provided with a liquid inlet valve (15), a centrifugal pump (16), a washing liquid pressure gauge (17), and a water inlet flow meter (18) in sequence along the flow direction of the washing liquid, and the liquid outlet pipeline (13) is provided with a drainage pressure gauge (19), a drainage flow meter (20), and a drainage valve (21) in sequence along the flow direction of the washing liquid.

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