Disc centrifuge with disc online cleaning function and operation method

Abstract

The invention relates to a disc centrifuge with a disc on-line cleaning function, which comprises a rotary drum, a rotating shaft and a disc cleaning device, the feeding channel is coaxial with the rotary drum, one end of the feeding channel is located in the rotary drum, and the other end of the feeding channel is connected with a feeding pipeline outside the rotary drum; the cleaning device is arranged in an annular gap between the liquid phase outlet and the feeding channel and is coaxial with the rotary drum, the liquid phase outlet is formed in the top of the rotary drum, and a cleaning opening is formed in the top of the cleaning device; one end of the liquid outlet pipe is connected with the liquid phase outlet, and a discharge valve is arranged on the liquid outlet pipe; one end of the cleaning liquid inlet pipe is connected with the cleaning opening, the other end of the cleaning liquid inlet pipe is connected with the liquid outlet pipe between the discharging valve and the liquid phase outlet, and a liquid storage valve, a cleaning tank, a pump body and a cleaning valve are sequentially connected to the cleaning liquid inlet pipe in series; according to the scheme, all layers of discs can be subjected to comprehensive online automatic cleaning, the nozzles are aligned to gaps of all layers of discs, it can be ensured that cleaning liquid covers the surfaces of all the discs, thorough cleaning is achieved, and the cleaning effect is better than that of manual cleaning or other non-targeted cleaning modes.

Description

Technical Field

[0001] The invention relates to a disc centrifuge, in particular to a disc centrifuge with a disc online cleaning function and an operating method. Background Art

[0002] Disc centrifuges use the powerful centrifugal force generated by high-speed rotation to separate materials with different densities. After the material enters the drum through the feed pipe, it will enter the lower disc from the neutral hole and be layered between the disc groups. The disc group greatly improves the separation efficiency by shortening the sedimentation path and increasing the separation area. The high-density heavy phase (such as solid or high-density liquid) is thrown toward the outer wall of the drum under the action of centrifugal force, while the low-density light phase (such as light liquid) is gathered in the axial direction and discharged through different outlets. Solid impurities are deposited on the outer wall of the drum and removed by intermittent or continuous slag discharge. Disc centrifuges are widely used in liquid-liquid, liquid-solid or liquid-liquid-solid separations, and are characterized by high efficiency, compactness and strong adaptability. However, in the actual production application of solid-liquid separation, especially when separating materials with higher viscosity, the particles will be brought into the gap between the upper discs by the mainstream liquid, and some solid particles will settle on the lower surface of the discs, causing the discs to be blocked and affecting the separation efficiency.

[0003] Existing solutions: The existing Chinese patent publication number is: CN118988577A, and the name of the patent is "A disc cleaning device for disc centrifuge";

[0004] However, the above disclosed disc cleaning has the following problems:

[0005] 1. Complex structure: The disc cleaning structure of a disc centrifuge usually includes multiple parts, which need to be cleaned and maintained frequently, increasing the cost of use and the difficulty of maintenance.

[0006] 2. It is easy to waste water and energy during the cleaning process: the traditional disc cleaning structure may require a large amount of water resources for cleaning, and the device also requires high electricity consumption when running alone. The waste of these resources will increase the cost of use and the environmental burden.

[0007] 3. Long cleaning time: The disassembly cleaning method requires stopping the machine and disassembling the disc group, which is time-consuming and labor-intensive, seriously affecting production efficiency.

[0008] 4. The manual operation is intensive, the degree of automation is low, and there are safety hazards: the disassembly and cleaning method requires manual handling of heavy disc packs, which is labor-intensive and has certain safety risks; during the cleaning process, the operator may be exposed to corrosive or toxic cleaning agents, posing a threat to the health of the operator.

[0009] In summary, how to achieve online cleaning of disc centrifuges has become an urgent problem that researchers in this field need to solve. Summary of the invention

[0010] The technical problem to be solved by the present invention is: how to realize online cleaning of a disc centrifuge;

[0011] The present invention discloses a disc centrifuge with a disc online cleaning function, comprising: a rotary drum, inside which a disc group is arranged; a feed channel, which is coaxially arranged with the rotary drum, one end of which is located in the rotary drum, and the other end is connected to a feed pipe outside the rotary drum; a cleaning device, which is arranged in an annular gap between a liquid phase outlet and the feed channel, and is coaxially arranged with the rotary drum; a liquid phase outlet is arranged on the top of the rotary drum, and a cleaning port is arranged on the top of the cleaning device; a liquid outlet pipe, one end of which is connected to the liquid phase outlet, and a discharge valve is arranged on the liquid outlet pipe; a cleaning liquid inlet pipe, one end of which is connected to the cleaning port, and the other end is connected to the discharge valve and the liquid outlet pipe between the liquid phase outlet, and the cleaning valve, a pump body, a cleaning tank, and a liquid storage valve are sequentially connected in series on the cleaning liquid inlet pipe.

[0012] Furthermore, the cleaning device comprises: a cylinder, the top of which is not closed and the bottom is closed; a plurality of nozzles, the array of which is arranged on the outer peripheral wall of the cylinder, and the outlets of which are oriented toward the gaps between the layer discs of the disc group.

[0013] The present scheme also discloses an operation method of a disc centrifuge with a disc online cleaning function, comprising the following steps: S1: the disc centrifuge starts working, at which time the discharge valve and the cleaning valve are closed, the liquid storage valve is opened, and the clarified light phase liquid enters the cleaning tank through the liquid phase outlet and the liquid outlet pipe and is stored; S2: the liquid level sensor on the cleaning tank detects whether the liquid level of the light phase liquid in the cleaning tank is full, if not full, continue to execute S1, if full, execute S3; S3: open the discharge valve, close the liquid storage valve, the light phase liquid separated by the disc centrifuge enters the liquid outlet pipe and enters the subsequent system for normal production; S4: when When the value detected by the pressure sensor in the drum does not exceed the set value, the centrifuge continues to work. If the value detected by the pressure sensor exceeds the set value, the drum will be separated and the slag discharge port will be opened to discharge the slag, and S5 will be executed: S5: Start the cleaning pump, close the discharge valve, open the liquid storage valve and the cleaning valve, and the light phase liquid stored in the cleaning tank enters the cleaning device through the cleaning liquid inlet pipe to clean the inside of the disc gap of the disc group, and the solid particles accumulated in the disc gap and the sediment particles that fall after cleaning are discharged from the slag discharge port; S6: After the slag discharge is completed, the cleaning pump is stopped and S1 is executed. The light phase liquid is stored in the cleaning tank as the cleaning liquid.

[0014] Beneficial effects of the invention: The invention is a disc centrifuge with disc online cleaning function and an operating method, and the scheme has the following advantages:

[0015] All layers of discs can be cleaned online automatically. The nozzle is aimed at the gap between each layer of discs to ensure that the cleaning liquid covers all disc surfaces and achieves thorough cleaning. The cleaning effect is better than manual cleaning or other non-targeted cleaning methods.

[0016] Closed-loop circulation, saving resources: A closed-loop circulation system is formed between the cleaning tank and the centrifuge, and the liquid can be recycled, reducing liquid consumption and waste; compared with traditional immersion cleaning, jet cleaning can make more effective use of cleaning liquid and reduce the consumption of water resources and cleaning agents.

[0017] High degree of automation: The centrifuge can be cleaned without disassembling it. The entire process can be automated, reducing manual intervention and improving production efficiency and stability. Online cleaning avoids secondary contamination that may be caused during the disassembly process and ensures the hygiene and safety of the product.

[0018] Compact structure and small footprint: As can be seen from the figure, the equipment layout of this process is relatively compact, which can save space.

[0019] Higher production efficiency: By reducing equipment downtime and cleaning time caused by particle accumulation, the present invention can improve production efficiency, reduce downtime, and improve the overall operating efficiency of the production line.

[0020] Longer Uptime: Reduced downtime for cleaning due to particle buildup increases equipment uptime.

[0021] Less product energy consumption: fewer additional cleaning devices and less additional energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 is a cross-sectional view of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the cleaning device;

[0025] Figure 3 It is an operation flow chart of the present invention. DETAILED DESCRIPTION

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] First, when the disc centrifuge is separating solids and liquids, the material enters from the feed channel and then enters the lower disc from the neutral hole; then, under the action of centrifugal force, the heavy phase particles with higher density will slide along the surface of the disc, and eventually be collected in the sediment area and discharged through the slag discharge mechanism, while the lighter liquid will be discharged from the upper light phase liquid outlet; for working conditions with strong adhesion of solid particles, there will be particle adhesion and deposition on the surface of the disc gap, and it may further cause the disc gap to be blocked, so it is very important to clean the disc surface.

[0028] In order to solve the above problems, Figure 1 As shown, this embodiment discloses a disc centrifuge with a disc online cleaning function, comprising: a drum 1, a disc group 2 is arranged inside the drum 1, a bottom end of a feed channel 3 is located inside the drum 1, and a top end is connected to a feed pipe (not shown), and materials enter the gaps between each layer of discs from the feed channel 3 and the neutral holes of the disc group 2, a cleaning device 4 is arranged between the feed channel 3 and the liquid phase outlet 5, and a liquid phase outlet 5 is opened at the top of the drum 1, so that the light phase liquid obtained after the material is centrifuged will be discharged from the liquid The light phase liquid is discharged from the phase outlet 5; a cleaning port 6 is opened on the top of the cleaning device 4, and the light phase liquid will enter the drum 1 from the cleaning port 6 and flush the disc gaps of the disc group 2; one end of the liquid outlet pipe 7 is connected to the liquid phase outlet 5, and a discharge valve 71 is arranged on the liquid outlet pipe 7; one end of the cleaning liquid inlet pipe 8 is connected to the cleaning port 6, and the other end is connected to the discharge valve 71 and the liquid outlet pipe 7 between the liquid phase outlet 5, and a cleaning valve 81, a pump body 82, a cleaning tank 83, and a liquid storage valve 84 are connected in series on the cleaning liquid inlet pipe 8 in sequence.

[0029] It should be noted that the feed channel 3, the cleaning device 4 and the drum 1 are coaxially arranged, and the top of the drum 1 is closed and connected to the outer wall of the cleaning device 4, with only a liquid phase outlet 5; the top of the cleaning device 4 is closed and isolated from the outer wall of the feed channel 3, with only a cleaning port 6.

[0030] like Figure 3As shown, in this embodiment, the specific operation process is as follows: S1: the disc centrifuge starts working, at this time, the discharge valve 71 and the cleaning valve 81 are closed, the liquid storage valve 84 is opened, and the clarified light phase liquid enters the cleaning tank 83 through the liquid phase outlet 5 and the liquid outlet pipe 7 and is stored; S2: the liquid level sensor on the cleaning tank 83 detects whether the liquid level of the light phase liquid in the cleaning tank 83 is full, if not full, continue to execute S1, if full, execute S3; S3: open the discharge valve 71, close the liquid storage valve 84, the light phase liquid after centrifugation by the disc centrifuge enters the liquid outlet pipe 7 and enters the subsequent system; S4: when the pressure sensor in the drum 1 detects the number of When the value does not exceed the set value, the centrifuge continues to work. If the value detected by the pressure sensor exceeds the set value, the drum 1 is separated and the slag discharge port is opened to discharge the slag, and S5 is executed: S5: Start the cleaning pump 82, close the discharge valve 71, open the liquid storage valve 84 and the cleaning valve 81, and the light phase liquid stored in the cleaning tank 83 enters the cleaning device 4 through the cleaning liquid inlet pipe 8 to clean the inside of the disc gap of the disc group 2, and the solid particles accumulated in the disc gap and the sediment particles dropped after cleaning are discharged from the slag discharge port; S6: After the slag discharge is completed, the cleaning pump 82 is closed, and S1 is executed to store the light phase liquid in the cleaning tank 83 again.

[0031] like Figure 2 As shown, in order to illustrate the specific structure of the cleaning device, the cleaning device 4 used in this embodiment includes: a cylinder 41, whose top is not closed for the feed channel 3 to pass through, and the bottom is closed; a plurality of nozzles 42, whose array is arranged on the outer peripheral wall of the cylinder 41, and whose outlets are oriented toward the gap between the layer discs of the disc group 2.

[0032] The cleaning device 4 is a vertical cylindrical structure, mainly composed of a hollow cylindrical barrel 41 and multiple nozzles 42 installed at different angles around it; multiple nozzles 42 are distributed around the barrel 41; the cleaning liquid (light phase liquid) is evenly sprayed through the nozzles to form a surrounding spray effect, thereby performing all-round cleaning on the cleaned object; the distribution and angle design of the nozzles 42 ensure that the cleaning liquid can cover all directions of its surface.

[0033] As for the nozzles 42, a plurality of small nozzles 42 are densely distributed around the lower area of ​​the outer peripheral wall of the cylinder 41; the nozzles 42 are short cylindrical and have a spraying function, extending horizontally or slightly inclined outward from the cylinder 41; the arrangement of the nozzles 42 is relatively regular, and multiple rows and columns of nozzles 42 are arranged around the outer wall of the cylinder 41 to form a nozzle array to generate sufficient water flow impact force, presenting a staggered and relatively uniform distribution state, which helps to achieve a more comprehensive cleaning effect.

[0034] The working principle of the cleaning device is as follows:

[0035] (1) The cleaning liquid (light phase liquid) is pressurized by the pump body 82 and enters from the top of the cylinder 41, and is transported to each nozzle 42 to perform high-pressure washing on the disc.

[0036] (2) The nozzle 42 sprays the light phase liquid to the outside of the cylinder 41 at a certain pressure and angle to wash each layer of the disc.

[0037] (3) The flushed liquid and dirt are discharged from the slag discharge port at the bottom of the disc centrifuge.

[0038] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. 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 disc online cleaning function, characterized in that: include: A rotating drum, inside of which a disc pack is arranged; A feed channel, which is coaxially arranged with the drum, one end of which is located inside the drum and the other end of which is located outside the drum, and is coaxially arranged with the drum; A cleaning device is arranged in the annular gap between the liquid phase outlet and the feed channel and is coaxially arranged with the drum. The top of the drum is provided with a liquid phase outlet, and the top of the cleaning device is provided with a cleaning port; A liquid outlet pipe, one end of which is connected to the liquid phase outlet and is provided with a discharge valve; A cleaning liquid inlet pipe has one end connected to the cleaning port and the other end connected to the liquid outlet pipe between the discharge valve and the liquid phase outlet. The cleaning liquid inlet pipe is serially connected with a liquid storage valve, a cleaning tank, a pump body and a cleaning valve.

2. According to claim 1, a disc centrifuge with disc online cleaning function is characterized in that: The cleaning device comprises: A cylinder, the top of which is not closed and the bottom of which is closed; A plurality of nozzles are arranged in an array on the outer peripheral wall of the cylinder, and outlets of the nozzles face the gaps between the layer discs of the disc group.

3. A method for operating a disc centrifuge with a disc online cleaning function, comprising the disc centrifuge according to any one of claims 1 to 2, characterized in that: The steps include: S1: The disc centrifuge starts working. At this time, the discharge valve and the cleaning valve are closed, and the liquid storage valve is opened. The clarified light phase liquid enters the cleaning tank through the liquid phase outlet and the liquid outlet pipe and is stored; S2: The liquid level sensor on the cleaning tank detects whether the liquid level of the light phase liquid in the cleaning tank is full. If not, continue to execute S1; if full, execute S3; S3: Open the discharge valve, close the liquid storage valve, and the light phase liquid separated by the disc centrifuge enters the liquid discharge pipe and enters the subsequent system for normal production; S4: When the value detected by the pressure sensor in the drum does not exceed the set value, the centrifuge continues to work. If the value detected by the pressure sensor exceeds the set value, the drum is separated and the slag discharge port is opened to discharge slag, and S5 is executed: S5: Start the cleaning pump, close the discharge valve, open the liquid storage valve and the cleaning valve, and the light phase liquid stored in the cleaning tank enters the cleaning device through the cleaning liquid inlet pipe to flush the inside of the disc gap of the disc group, and discharge the solid particles accumulated in the disc gap and the sediment particles dropped after cleaning from the slag discharge port; S6: After the slag discharge is completed, the cleaning pump is shut down and S1 is executed. The light phase liquid is stored in the cleaning tank as the cleaning liquid.

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