Filtering and defoaming integrated tank and vacuum filtration and defoaming system

Abstract

The filtering and defoaming integrated tank comprises a liquid inlet, a liquid outlet, a defoaming tank body, a multi-layer filtering device, a feeding pipe and a liquid guide pipe, and the defoaming tank body is used for providing a defoaming space; the multiple layers of filtering devices are arranged above the defoaming tank body, each layer of filtering device comprises a filtering tank body, a screen mesh and a partition plate, a filtering chamber is defined by the filtering tank bodies, the screen meshes and the partition plates are sequentially arranged in the filtering chamber, and the adjacent layers of filtering devices are detachably connected; the feeding pipe and the liquid guide pipe are arranged outside the filtering tank body, the feeding pipe is communicated with each filtering chamber, and the liquid guide pipe comprises a first connecting port communicated with each filtering chamber and a second connecting port communicated with the defoaming space. The integrated tank can integrate filtering and defoaming processes, and also has the advantage that the screen is easy to replace. The utility model further provides a vacuum filtration defoaming system.

Description

Technical Field

[0001] The utility model relates to the field of dispersion or prevention of liquid foam, in particular to the field of defoaming devices. Background Art

[0002] In industrial production, liquid solutions need to be defoamed. For solutions with a certain viscosity, filtration is also an important step. In order to improve production efficiency, an integrated device that integrates filtration and defoaming is needed. Utility Model Content

[0003] One purpose of the utility model is to provide a filtering and defoaming integrated tank.

[0004] Another object of the utility model is to provide a vacuum filtration and defoaming system.

[0005] To achieve the above-mentioned purpose, the integrated filtering and defoaming tank includes a liquid inlet and a liquid outlet, and also includes a defoaming tank body, a multi-layer filtering device, a feeding pipe and a liquid guiding pipe. The defoaming tank body is used to provide a defoaming space; the multi-layer filtering device is arranged above the defoaming tank body, and each layer of the filtering device respectively includes a filtering tank body, a screen and a partition, the filtering tank body surrounds a filtering chamber, the screen and the partition are arranged in the filtering chamber in sequence, and the filtering devices of adjacent layers are arranged to be detachably connected; the feeding pipe is arranged outside the filtering tank body and is connected to each of the filtering chambers; the liquid guiding pipe is arranged outside the filtering tank body, including a first connecting port connected to each of the filtering chambers and a second connecting port connected to the defoaming space.

[0006] In one or more embodiments, the integrated filtering and defoaming tank includes a quick-release structure for connecting each layer of filtering devices.

[0007] In one or more embodiments, the quick-release structure includes a connector, a clip, and a plurality of extension plates, each of the extension plates is respectively disposed on the filter tank body, and the connector is detachably connected to the extension plate via the clip.

[0008] In one or more embodiments, the integrated filtering and defoaming tank further comprises a cover body, and the cover body and the defoaming tank body are detachably connected to the uppermost filtering device and the lowermost filtering device, respectively.

[0009] In one or more embodiments, the filter device further comprises a sleeve located on the inner wall of each layer of the filter tank, and a gasket is provided between the sleeves of the filter devices of adjacent layers.

[0010] In one or more embodiments, the filtering device further comprises a filter cloth disposed above the screen.

[0011] In one or more embodiments, an ultrasonic vibrator is provided outside the defoaming tank.

[0012] In one or more embodiments, the integrated filtering and defoaming tank is provided with an observation window for viewing the filtering chamber and / or the defoaming space.

[0013] The vacuum filtration and defoaming system includes the above-mentioned integrated filtration and defoaming tank, a vacuum pump, a negative pressure buffer component and a feed tank. The negative pressure buffer component is arranged between the vacuum pump and the integrated filtration and defoaming tank, and includes a negative pressure buffer tank and a pressure relief valve. The feed tank is arranged above the integrated filtration and defoaming tank and is connected to the liquid inlet of the integrated filtration and defoaming tank through a valve.

[0014] In one or more embodiments, the feed tank includes an opening cover that opens and closes automatically.

[0015] The above-mentioned integrated filtering and defoaming tank integrates the functions of filtering and defoaming by setting the defoaming space below the filtering device, so that filtering and defoaming can be carried out in an integrated manner. At the same time, the multi-layer filtering device is set to be detachably connected, which effectively improves the replacement efficiency of filtering components such as screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of the vacuum filtration and defoaming system;

[0018] Figure 2 It is a partial enlarged view of each layer of the filtering device;

[0019] Figure 3 It is a schematic diagram of the connection structure between each layer of filtering devices and the defoaming tank;

[0020] Figure 4 is a top view of one embodiment of a screen. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0022] It should be noted that these and other subsequent drawings are only examples and are not drawn in proportion, and should not be used as a limitation on the actual scope of protection required by the present utility model.

[0023] Reference Figure 1 and Figure 2 As shown, the vacuum filtration and defoaming system includes a feed tank 2, a filtration and defoaming integrated tank 3, a negative pressure buffer component and a vacuum pump 5.

[0024] The filtering and defoaming integrated tank 3 includes a liquid inlet 301 and a liquid outlet 302, and also includes a multi-layer filtering device 32, a defoaming tank body 31, a feeding pipe 35 and a liquid guide pipe 34. The defoaming tank body 31 provides a defoaming space B, and the filtering device 32 provides a filtering chamber C.

[0025] The feed tank 2 is arranged above the filter and defoamer integrated tank 3, and is connected to the liquid inlet 301 of the filter and defoamer integrated tank 3 through the first valve 23 and the discharge pipe. Preferably, the feed tank 2 is arranged vertically and horizontally above the filter and defoamer integrated tank 3. A polyfluoro protective layer is provided inside the feed tank 2, and a single-layer stainless steel screen is also provided. A nylon screen with a suitable aperture can be fixed on the upper part of the stainless steel screen. A first observation window 22 is provided on the side circumference of the tank body of the feed tank 2.

[0026] In some embodiments, the feed tank 2 includes an opening cover 20 that opens and closes automatically. Figure 1 In the embodiment shown, an electric lifting device 11 is provided on the upper side and the left side of the feed tank 2, and the electric lifting device 11 is connected to the opening cover 20. The electric lifting device 11 is used to move the opening cover 20 to the end away from the opening, and the solution to be filtered is poured into the feed tank 2. The height of the solution is observed through the first observation window 22 on the tank body of the feed tank 2, and the feeding is stopped when the height reaches a suitable height. The electric lifting device 11 is operated to make the opening cover 20 correspond to the opening position of the feed tank 2, so that the feed tank 2 is in a closed state.

[0027] The bottom of the feed tank 2 is funnel-shaped, with a valve opening at the bottom and a first valve 23 connected to the outside for discharging the solution to be filtered into the filtering and defoaming integrated tank 3 .

[0028] The negative pressure buffer component is arranged between the vacuum pump 5 and the filtering and defoaming integrated tank 3, and includes a negative pressure buffer tank 4 and a pressure relief valve 6. The negative pressure buffer tank 4 is connected to the vacuum pump 5 and the defoaming tank body 31 of the filtering and defoaming integrated tank 3 through valves. A polyfluoro protective layer is arranged inside the tank body of the negative pressure buffer tank 4. In a specific embodiment, there is a vacuum filtration pipeline opening on the left and right sides of the top of the negative pressure buffer tank 4, which is connected to the vacuum pump 5 and the defoaming tank body 31 respectively. Figure 1 As shown, the negative pressure buffer tank 4 is connected to the vacuum pump 5 and the defoaming tank body 31 respectively through the second valve 43, the third valve 45 and the vacuum filtration pipeline.

[0029] The pressure relief valve 6 is arranged on the cover of the negative pressure buffer tank 4. Furthermore, a pressure gauge 41 is arranged on the top of the negative pressure buffer tank 4 to detect the pressure inside the tank. A discharge port and a discharge port control valve 44 are arranged on the bottom of the negative pressure buffer tank 4 to discharge the liquid inside the negative pressure buffer tank 4. The tank body of the negative pressure buffer tank 4 is also provided with a second observation window 42 to view the operation inside the tank.

[0030] When the filtration and defoaming integrated tank 3, the negative pressure buffer tank 4 and the vacuum pump 5 are connected to each other, turning on the vacuum pump 5 can put the filtration and defoaming integrated tank 3 and the negative pressure buffer tank 4 in a negative pressure state. Opening the pressure relief valve 6 can adjust the pressure in the filtration and defoaming integrated tank 3 and the negative pressure buffer tank 4.

[0031] The filtering and defoaming integrated tank 3 has the functions of integrated filtering and defoaming. Figures 1 to 3 It is understood that the defoaming tank body 31 provides a defoaming space B, and the liquid outlet 302 is located at the bottom of the defoaming tank body 31. The multi-layer filter device 32 is located above the defoaming tank body 31, including a filter tank body 324, a screen 325 and a partition 326, and the screen 325 and the partition 326 are sequentially arranged in the filter chamber C. Preferably, the partition 326 is arranged at the bottom of each layer of the filter tank body 324. The filter tank body 324 encloses a filter chamber C, and the partitions 326 of adjacent filter devices isolate the filter chambers C from each other. It is understood that the partition 326 of the bottom filter device isolates the filter chamber C from the defoaming space B.

[0032] The filtered liquid enters each layer of the filter device 32 through the feed pipe 35, and flows out of each layer of the filter device through the liquid guide pipe 34. Figure 1 and Figure 2 As shown, the feed pipe 35 is arranged outside the filter tank 324 and communicates with each filter chamber C, so as to feed the material to each chamber. Figure 1 In some of the embodiments shown, the inlet of the feeding pipe 35 is connected to the first layer of filter chambers, and the feed is fed into the filter chambers C below under the action of gravity.

[0033] The liquid conduit 34 is arranged outside the tank body 324. Preferably, the liquid conduit 34 is arranged on the opposite side of the feed pipe 35. The liquid conduit 34 includes a first connection port connected to each filter chamber C and a second connection port connected to the defoaming space B. For the same filter chamber C, the connection port of the liquid conduit 34 connected to the filter chamber is lower than the connection port of the feed pipe 35 connected to the filter chamber. Through this design, each layer of the screen 325 has a pipeline connected to the next layer of filter chamber C and the defoaming space B below, thereby expanding the filtration area several times. In this way, the liquid filtered by each layer of the filter device gradually flows to the lower layer for filtration until it is finally discharged into the defoaming space B of the defoaming tank body 31 through the second connection port of the liquid conduit 34 for defoaming. Through the above design, the filtering and defoaming integrated tank 3 integrates the functions of filtering and defoaming.

[0034] The filter devices 32 of adjacent layers are arranged to be detachably connected, so that the filter devices can be easily replaced, such as by connecting the filter tank bodies 324 of each layer through a quick-release structure 36 .

[0035] In some embodiments, the quick-release structure 36 includes a connector 362, a clip (not shown in the figure) and a plurality of extension plates 361, and the extension plates 361 are respectively located on each layer of the filter tank body 324, and can also be located on the defoaming tank body 31. The connector 362 is detachably connected to each extension plate 361 through a clip. When it is necessary to replace the filter element such as the screen, the clip is unfastened, the connector 362 and the extension plate 361 of this layer are separated, the filter device 32 of this layer is quickly separated, and then the screen inside the filter chamber C of this layer is removed for replacement. This design can effectively improve the replacement efficiency of the filter element such as the screen, and significantly reduce the replacement workload. In other embodiments, the quick-release structure 36 can also be a threaded structure, such as the connector 362 is threadedly connected to the extension plate 361, and the fastening and connection between the layers of the tank body are achieved by fasteners such as nuts. It can be understood by those skilled in the art that the quick-release structure includes but is not limited to the above embodiments.

[0036] In some embodiments, Figure 2 As shown, the filter device 32 also includes a liner 329 located on the inner wall of the filter tank. Preferably, the liner 329 can be a PTFE protective layer. When adjacent layers of filter devices 32 are docked, gaskets 328 are provided between the liner 329 of the adjacent layers of the filter devices to prevent leakage, such as PP gaskets.

[0037] Based on this embodiment, the filter device 32 further includes a filter cloth 327 located above the screen 325. The filter cloth 327 can be clamped and fixed by a pair of washers 328. Figure 2 As shown, clamping can also be performed by bushing 329 and washer 328.

[0038] The screen 325 of the filter device 32 includes but is not limited to metal screens such as stainless steel. For example, in a specific embodiment, a layer of nylon filter cloth with a suitable pore size is laid on the stainless steel screen.

[0039] In some embodiments, Figure 3 As shown, the filtering and defoaming integrated tank 3 also includes a cover 33, which can be a detachable cover with holes. A polyfluoride protective layer is provided inside the detachable cover with holes, and the opening on the top of the cover is equivalent to the outer aperture of the first valve 23 at the bottom of the feed tank 2. The cover 33 and the defoaming tank 31 are detachably connected to the topmost filter device and the bottommost filter device respectively, and the connection structure of the cover 33, the defoaming tank 31 and the filter device 32 can be the above-mentioned quick-release structure 36, or other structures can be selected.

[0040] The bottom of the defoaming tank 31 is funnel-shaped, and a liquid outlet 302 is provided for discharging the liquid after the defoaming process is completed. The liquid outlet 302 is connected to a fourth valve 303. A connecting hole is provided on the upper side of the defoaming tank 31, which is connected to the negative pressure buffer tank 4 through a vacuum filtration pipeline. The function of the negative pressure buffer tank 4 is to reduce the safety hazards and loss of the solution caused by the failure to timely discover the excessively high liquid level of the solution during the defoaming filtration, and to make it safer and simpler for workers to perform pressure relief operations.

[0041] In some embodiments, a polytetrafluoroethylene protective layer may also be provided inside the chamber of the defoaming tank 31 .

[0042] A plurality of ultrasonic vibrators 37 are provided outside the defoaming tank 31. When the ultrasonic vibrators 37 are turned on, the ultrasonic vibrators 37 drive the defoaming tank 31 to vibrate, and the bubbles in the filtrate float to the surface of the filtrate through vibration. Furthermore, the defoaming space B is connected to the vacuum pump 5, and the vacuum pump 5 is used to produce a low-pressure environment in the defoaming space B, which further promotes the bubbles floating to the surface of the filtrate to rise and burst, thereby producing a better defoaming effect.

[0043] The filtering and defoaming integrated tank is provided with an observation window for viewing the filtering chamber C and / or the defoaming space B. For example, the filtering and defoaming integrated tank 3 is provided with a third observation window 2838 for observing the filtration speed of the solution in the filtering chamber C.

[0044] If it is found that the filtration speed has been significantly slowed down or it is completely impossible to filter, close the first valve 23 at the bottom of the feed tank 2. After a period of time, turn off the vacuum pump 5 and open the pressure relief valve 6 at the top of the negative pressure buffer tank 4. When the pressure in the filter-defoaming integrated tank 3 and the negative pressure buffer tank 4 is the same as that in the outside world, remove the filter devices 32 of each layer through the quick-release structure 36, replace the screens 325 of each layer of the filter devices, and then reinstall them on the filter-defoaming integrated tank 3 and fasten the clips. Restart the vacuum pump 5 to put the filter-defoaming integrated tank 3 and the negative pressure buffer tank 4 in a negative pressure state, open the first valve 23 at the bottom of the feed tank 2, and allow the solution to be filtered to enter the stainless steel filter screen in the filter-defoaming integrated tank 3, and filter again.

[0045] Alternatively, the height of the solution in the defoaming space B is observed through the third observation window 2838 on the filtering and defoaming integrated tank 3. If it is found that the bubble level in the solution is about to reach the vacuum filtration pipe port connected to the negative pressure buffer tank 4, the first valve 23 at the bottom of the feed tank 2 is closed, the vacuum pump 5 is closed, and the pressure relief valve 6 at the top of the negative pressure buffer tank 4 is opened. When the pressure in the filtering and defoaming integrated tank 3 and the negative pressure buffer tank 4 is the same as that in the outside, the vacuum pump 5 is reopened to make the filtering and defoaming integrated tank 3 and the negative pressure buffer tank 4 in a negative pressure state, and the first valve 23 at the bottom of the feed tank 2 is opened to perform the filtering and defoaming process again.

[0046] After the suction filtration and defoaming is completed, the vacuum pump 5 is turned off, the ultrasonic vibrator 37 is turned off, and the pressure relief valve 6 at the top of the negative pressure buffer tank 4 is opened. When the pressure in the filtration and defoaming integrated tank 3 and the negative pressure buffer tank 4 is the same as that in the outside, the fourth valve 303 at the bottom of the filtration and defoaming integrated tank 3 and the discharge port control valve 44 at the bottom of the negative pressure buffer tank 4 are opened at the same time, and the filtrate after filtration and defoaming is discharged through the discharge ports at the bottom of the filtration and defoaming integrated tank 3 and the negative pressure buffer tank 4.

[0047] The following is an introduction to the system's operating procedures.

[0048] First, close the first valve 23 at the bottom of the feed tank 2, the fourth valve 303 at the bottom of the filtering and defoaming integrated tank 3, the pressure relief valve 6 at the top of the negative pressure buffer tank 4, and the discharge port control valve 44 at the bottom. Then open the third valve 45 between the filtering and defoaming integrated tank 3 and the negative pressure buffer tank 4, and the second valve 43 between the negative pressure buffer tank 4 and the vacuum pump 5.

[0049] Use the electric lifting device 11 to open the feed tank 2, add material to the feed tank 2, observe the solution height through the first observation window 22 on the filtering and defoaming integrated tank 3, stop adding material when the height is appropriate, use the electric lifting device 11 to control the movement of the opening cover 20 to close the feed tank 2.

[0050] The vacuum pump 5 is turned on to form a negative pressure environment in the filtering and defoaming integrated tank 3 and the negative pressure buffer tank 4. The first valve 23 at the bottom of the feed tank 2 is opened, and the solution in the feed tank 2 first enters the filtering device 32 and then enters the defoaming tank body 31. The ultrasonic vibrator 37 is turned on to perform defoaming.

[0051] When the screen needs to be replaced, the pressure in the filter defoaming integrated tank 3 and the negative pressure buffer tank 4 is adjusted to be the same as the atmospheric pressure, and then the filter device 32 is removed using the quick-release structure 36, and then fixed again after replacement. The filter defoaming integrated tank 3 and the negative pressure buffer tank 4 are put in a negative pressure state again.

[0052] After the defoaming process is completed, turn off the vacuum pump 5, adjust the pressure in the filtering and defoaming integrated tank 3 and the negative pressure buffer tank 4 to the same as the atmospheric pressure, open the fourth valve 303 at the bottom of the filtering and defoaming integrated tank 3 and the discharge port control valve 44 at the bottom of the negative pressure buffer tank 4 to discharge the filtrate.

[0053] The above-mentioned integrated filtering and defoaming tank effectively improves the replacement efficiency of filter components such as screens by arranging multiple layers of detachable filtering devices; the multiple layers of filtering devices are connected to each other to form a filtering component located above the defoaming space, so that the tank body integrates the filtering function and the defoaming function, and cooperates with the feed tank to realize the integrated design of the defoaming process; the ultrasonic vibrator on the outside of the defoaming tank cooperates with the vacuum pump to effectively improve the defoaming effect.

[0054] It should be noted that the above content uses words such as "first" and "second" to limit components, which is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0055] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0056] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. A filtration and defoaming integrated tank, comprising a liquid inlet and a liquid outlet, characterized in that: Also includes: A defoaming tank body, used for providing a defoaming space; A multi-layer filtering device is arranged above the defoaming tank body, each layer of the filtering device comprises a filtering tank body, a screen and a partition respectively, the filtering tank body surrounds a filtering chamber, the screen and the partition are arranged in the filtering chamber in sequence, and the filtering devices of adjacent layers are arranged to be detachably connected; A feeding pipe is arranged outside the filter tank and communicated with each of the filter chambers; and The liquid guide tube is arranged outside the filter tank body, and comprises a first connection port communicated with each of the filter chambers and a second connection port communicated with the defoaming space.

2. The filtering and defoaming integrated tank according to claim 1, characterized in that: The integrated filtering and defoaming tank comprises a quick-release structure for connecting the filtering devices at each layer.

3. The filtering and defoaming integrated tank according to claim 2, characterized in that: The quick-release structure comprises a connecting piece, a clip and a plurality of extension plates, each of the extension plates is respectively arranged outside each of the filter tank bodies, and the connecting piece is detachably connected to the extension plate via the clip.

4. The filtering and defoaming integrated tank according to claim 1, characterized in that: The integrated filtering and defoaming tank further comprises a cover body, and the cover body and the defoaming tank body are detachably connected to the uppermost filtering device and the lowermost filtering device respectively.

5. The filtering and defoaming integrated tank according to claim 1, characterized in that: The filter device further comprises a bushing located on the inner wall of each layer of the filter tank, and a gasket is arranged between the bushings of the filter devices of adjacent layers.

6. The filtering and defoaming integrated tank according to claim 5, characterized in that: The filtering device also includes a filter cloth arranged above the screen.

7. The filtering and defoaming integrated tank according to claim 1, characterized in that: An ultrasonic vibrator is arranged outside the defoaming tank.

8. The filtering and defoaming integrated tank according to claim 1, characterized in that: The integrated filtering and defoaming tank is provided with an observation window for viewing the filtering chamber and / or the defoaming space.

9. Vacuum filtration and defoaming system, characterized in that: include: The filtering and defoaming integrated tank according to any one of claims 1 to 8; Vacuum pump; A negative pressure buffer component is arranged between the vacuum pump and the filtering and defoaming integrated tank, comprising a negative pressure buffer tank and a pressure relief valve; and A feed tank is arranged above the filtering and defoaming integrated tank and is connected to the liquid inlet of the filtering and defoaming integrated tank through a valve.

10. The vacuum filtration and defoaming system according to claim 9, characterized in that: The feed tank comprises an opening cover which opens and closes automatically.

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