Liquid filtering device

Abstract

The utility model relates to a liquid filtering device which comprises a hollow tank body with an opening at one end, a filter element arranged in an inner cavity of the tank body and a tank cover movably sealing the opening of the tank body, a tank body liquid inlet is arranged at the bottom or on the side wall of the tank body, a tank body liquid outlet is arranged on the side wall of the tank body, and a drain outlet is further arranged at the bottom of the tank body. A gap is reserved between the outer wall of the filter element and the inner wall of the tank body, a filter element liquid outlet is formed in the side wall, close to the tank body liquid outlet, of the filter element, and the filter element liquid outlet is communicated with the tank body liquid outlet; filter element liquid inlet filtering holes are formed in the side wall of the filter element, and a filtering layer is attached to the outer wall of the filter element. The basket type filter overcomes the defects that a filter screen in a filter cartridge of an existing basket type filter is easy to block and needs to be cleaned frequently, the filter element is movably installed in the tank body, liquid flows into an inner cavity of the filter element after being filtered through the filter layer and the filter element liquid inlet filter holes, and then flows out of the tank body through the filter element liquid outlet and the tank body liquid outlet, and the drain outlet is formed in the bottom of the tank body. The device has the advantages of no need of frequent cleaning, convenience in cleaning and high cleaning efficiency.

Description

Technical Field

[0001] The utility model relates to a liquid filtering device, in particular to the field of cut water filtering in viscose staple fiber production. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] During viscose staple fiber production, a water-jet cutter is typically used to cut viscose staple fiber tows into staple fibers of a specified length. Because hydrogen sulfide and carbon disulfide remain in the viscose staple fiber tows, high-temperature cutting water is used during the tow cutting process to facilitate the recovery of these sulfur-containing waste gases through the exhaust gas recovery system.

[0004] To save energy, pure condensate from the flash evaporation system in acid stations is typically recycled as shut-off water. However, this pure condensate is steam condensate (at a temperature of approximately 90°C) generated by the flash evaporation system's heat exchanger. Because the heat exchanger is made of graphite, it is prone to shedding in high-temperature, corrosive operating environments, producing graphite debris that can enter the pure condensate. Therefore, to prevent black specks from entering the viscose fiber and degrading product quality, this water must be filtered before use.

[0005] Patent application 202310858936.7 mentions the use of a polypropylene tow filter to filter flushing water, but does not mention the type of filtration device used to filter cut-off water. Compared to flushing water, cut-off water has fewer impurities and a lower flow rate. Using a polypropylene tow filter would increase the cost of the filtration device.

[0006] A basket filter is a small device that removes small amounts of solid particles from a liquid. When the fluid enters a filter barrel equipped with a filter screen of a certain specification, its impurities are blocked, and the clean filtrate is discharged from the filter outlet, resulting in a pure fluid. However, after the basket filter has been operating for a period of time, a large amount of impurities settle in the filter basket, which can easily become clogged, causing the flow rate to drop. Therefore, the filter basket needs to be cleaned regularly. To address the problems of cumbersome disassembly, long disassembly time, and low cleaning efficiency of basket filters, patent 201921908961.7 discloses a basket filter. During disassembly, the flange cover is simply rotated so that the first protrusion aligns with the first notch and the second protrusion aligns with the second notch; the flange cover is then moved away from the barrel to remove the flange cover; the filter basket is then removed and cleaned. Although this patent solves the problems of cumbersome disassembly, long disassembly time, and low cleaning efficiency of basket filters, due to the high temperature and high stamping pressure of the cut-off water, if the rotating flange cover design described in the patent is used, there is a problem of having to wait for the cut-off water to cool during disassembly. In addition, if the filtering structure described in the patent is adopted, there are problems such as the filter screen in the filter cartridge is easily clogged and the filtering accuracy is not high enough, which can easily lead to foreign matter being mixed into the viscose fiber product.

[0007] Therefore, it has become an urgent task to provide a liquid filtering device that does not require frequent cleaning, is easy to clean, has high cleaning efficiency, and has good filtering effect. Utility Model Content

[0008] In order to overcome the shortcomings of the existing filter screen in the filter cartridge used in the filtration of cut-off water for viscose staple fiber production, such as easy clogging, frequent cleaning, low cleaning efficiency, inconvenience in cleaning and poor filtering effect, the utility model provides a liquid filtering device, which movably installs a filter element in the tank body, and allows the liquid to be filtered to first pass through the filter layer movably covering the liquid inlet filter hole of the filter element and the liquid inlet filter hole of the filter element, and then flow into the inner cavity of the filter element, and then flow out of the tank body through the liquid outlet of the filter element and the liquid outlet of the tank body in turn, and a sewage outlet is provided at the bottom of the tank body. The device has the advantages of good filtering effect, no need for frequent cleaning, easy cleaning and high cleaning efficiency.

[0009] The technical solution of the utility model is as follows:

[0010] A liquid filtering device comprises a hollow tank body with an open end, a filter element movably mounted in the tank body cavity, and a tank cover movably closing the tank body opening; a tank body liquid inlet communicating with the inside and outside of the tank body is provided on the top of the tank body, a tank body liquid outlet connected to an external delivery pipeline is provided on the side wall of the tank body, and a sewage outlet communicating with the inside and outside of the tank body is provided on the bottom of the tank body; the filter element is a hollow structure, with a gap between the outer wall of the filter element and the inner wall of the tank body; a filter element liquid outlet is provided on the side wall of the filter element near the tank body liquid outlet, and the tank body liquid outlet is connected to the filter element liquid outlet The filter element is connected so that the inner cavity of the filter element is connected with the outside of the tank body, and a sealing structure is arranged between the tank cover and the tank body, and between the filter element liquid outlet and the tank body liquid outlet; a plurality of filter element liquid inlet filter holes are arranged at intervals on the side wall of the filter element and pass through the side wall of the filter element, and a filter layer covering the filter element liquid inlet filter holes is movably attached to the outer wall of the filter element; the liquid to be filtered flows into the gap between the inner wall of the tank body and the outer wall of the filter element from the liquid inlet of the tank body in turn, and then flows into the inner cavity of the filter element after being filtered through the filter layer and the filter element liquid inlet filter hole in turn, and then flows out of the tank body through the tank body liquid outlet.

[0011] The liquid filtering device of the present application is a device that allows the liquid to be filtered (such as the cut water in the production of viscose staple fibers) to first pass through the filter layer covering the outer wall of the filter element and the filter hole of the filter element, and then flow out of the tank through the filter outlet and the tank outlet in sequence. A sewage outlet is provided at the bottom of the tank body to change the inlet and outlet mode of the liquid to be filtered, effectively solving the problem of foreign matter mixed into the viscose fiber finished product causing the product quality to be reduced. The device has the advantages of low cost, no need to frequently clean the filter element, and high filter element cleaning efficiency. The impurities (such as graphite debris, etc.) filtered by the liquid filtering device are directly located outside the filter element and are automatically deposited at the bottom of the tank due to gravity. There is no need to clean the filter element specifically at ordinary times. Most of the filtered impurities can be discharged by simply opening the sewage outlet, which is convenient and quick, and also greatly improves the service life of the filter element. When the filter efficiency of the filter element decreases, the filter element can be directly removed from the tank body, and the filter layer covering the filter hole of the filter element can be removed for cleaning to quickly restore the filter efficiency of the filter element. The liquid inlet of the tank body is set at the top of the tank body, and the liquid outlet of the tank body is on the same side as the liquid outlet of the filter element, that is, the opening directions of the liquid inlet of the tank body and the liquid outlet of the tank body are at right angles, compared with the design in the prior art where the opening directions of the two are 180°. In this way, when liquid (such as cut-off water) enters, it can stay in the inner cavity of the tank body for a longer time to ensure the filtration efficiency.

[0012] Among them, the filter layer is mainly used to intercept and cut off graphite debris with relatively large particle size in the water and graphite debris escaping from the pure condensate filter. The filter layer can be bundled by adjusting the metal binding band (such as stainless steel binding band) for easy adjustment and disassembly and cleaning. The hollow design of the filter element with filter inlet holes on the side wall, combined with the outer filter layer, not only reduces the weight of the filter element and facilitates maintenance and cleaning operations, but also greatly improves the filtration accuracy and achieves better filtration effect. The drain port can discharge impurities such as graphite debris accumulated around the drain port at the bottom of the tank, extend the disassembly and cleaning cycle of the filter element, increase the filtration capacity of the filter element, and can also discharge residual cut-off water when disassembling and cleaning the filter element, effectively preventing high-temperature cut-off water from splashing and injuring people during disassembly.

[0013] The filter layer is a 250-350 mesh filter cloth, and the pore size of the filter element's liquid inlet filter hole is 3-5mm.

[0014] The preferred filter is more suitable for filtering cut-off water in viscose staple fiber production, and can further improve the filtering effect.

[0015] A cleaning port is provided at one end of the filter element opposite to the liquid outlet of the filter element, and the tank cover closes the cleaning port.

[0016] The design of the filter element cleaning port facilitates the cleaning operation inside the filter element, which can greatly save costs.

[0017] The tank body and the filter element are both extended in the transverse direction, the tank cover is arranged at one transverse end of the tank body, and the tank body liquid outlet is arranged at the other transverse end of the tank body.

[0018] The filter element inside the tank is arranged horizontally. The liquid to be filtered (such as cut-off water) penetrates into the filter element from the outside of the filter element. Impurities such as graphite debris remain on the filter layer outside the filter element. Under the impact of the liquid (such as cut-off water), the impurities will accumulate around the drain port. Opening the drain port at the bottom of the tank can discharge some of the impurities and increase the filtration capacity.

[0019] A fixing plate extending in the circumferential direction is fixed to the outer wall of one end of the filter element where the cleaning port is located. The fixing plate is sandwiched between the edge of the tank opening and the tank lid to secure the filter element in place within the tank. The sealing structure between the tank lid and the tank body is located between the fixing plate and the tank lid, and between the fixing plate and the edge of the tank opening. The filter element and the fixing plate are connected by welding.

[0020] The preferred filter element fixing method makes the installation of the filter element more flexible and reliable.

[0021] The sealing structure is an O-ring.

[0022] The provision of an O-ring can enhance sealing performance and prevent impurities (such as graphite debris, etc.) from entering the interior of the filter element through the small gaps between the filter element and the tank cover, and between the filter element and the tank body. In addition, the O-ring is readily available and low in cost.

[0023] The top of the tank body is also provided with an exhaust port for relieving the pressure of the tank body.

[0024] The exhaust port is used to exhaust and relieve pressure, which can prevent the danger caused by pressure increase after the filter is blocked, and avoid the situation where high-temperature cut-off water splashes and injures people when the filter element is disassembled and cleaned.

[0025] The tank body opening is located on one lateral side wall of the tank body, and the tank cover is movably connected to the tank body by a flange bolt; the liquid filtering device also includes a curved connecting arm, one end of which is fixed to the outer wall of the tank body, and the other end extends to the outer side of the junction of the tank body opening and the tank cover, and the end is provided with a through hole; a movable bolt is also provided on the tank cover, one end of the eyelet of the movable bolt is rotatably connected to the edge of the tank cover, and the other end extends out of the outer side of the tank cover and can be movably penetrated with the through hole and locked by a nut, and the center line of the rotational connection between the movable bolt and the edge of the tank cover is perpendicular to the center line of the through hole.

[0026] The tank cover is secured with a combination of flange bolts and an angled connecting arm. Compared to flange bolts alone, if the drain or exhaust outlet fails, some flange bolts can be removed to drain the liquid and relieve pressure. Once the liquid is drained and the pressure is relieved, the tank cover can be opened using the angled connecting arm, effectively preventing splashing and injury from the high-temperature liquid inside the tank. If the tank cover is secured with flange bolts alone, removing the flange bolts in the event of a drain or exhaust outlet failure would make it impossible to confirm the discharge status of the liquid and pressure inside the tank, potentially posing a risk.

[0027] The outer surface of the can cover is provided with at least one handle for conveniently holding the can cover.

[0028] The handle is designed to facilitate opening the lid.

[0029] The inner cavity of the tank is cylindrical.

[0030] The curved connecting arm is fixed to the outer wall of the tank body by a cotter pin 10; one end of the eyelet of the movable bolt is rotatably connected to the edge of the tank cover by a pin 11, and a cotter pin 10 is passed through the tail of the pin 11 in a direction perpendicular to the central axis of the pin 11 to prevent the pin 11 from falling out.

[0031] The cotter pin can prevent the related fixing parts from falling out, making the connection more secure.

[0032] The other end of the pin is inserted into the through hole and fixed by a nut 12 and a washer 13.

[0033] The filter layer is a filter cloth that is resistant to high temperature, acid, wear and corrosion, and the filter element is a metal bracket with distributed porous structures.

[0034] The preferred material achieves a balance between cost and filtering effect.

[0035] Compared with the prior art, the utility model application has the following advantages:

[0036] 1) The liquid filtering device of the present application is characterized by a movably installed filter element in a tank body, and allows the liquid to be filtered to first pass through the filter layer movably covering the liquid inlet filter hole of the filter element and the filter of the filter element, and then flow into the inner cavity of the filter element, and then flow out of the tank body through the liquid outlet of the filter element and the liquid outlet of the tank body in sequence, and a sewage outlet is provided at the bottom of the tank body. The device has the advantages of good filtering effect, no need for frequent cleaning, easy cleaning and high cleaning efficiency;

[0037] 2) The hollow design of the filter element with a filter inlet hole on the side wall, combined with the outer filter layer, not only reduces the weight of the filter element and facilitates maintenance and cleaning operations, but also greatly improves the filtration accuracy and achieves better filtration effects, ensuring that the shut-off water used in the shut-off system is clean;

[0038] 3) The design of the filter element cleaning port facilitates the cleaning operation inside the filter element, which can greatly save costs;

[0039] 4) The tank liquid inlet is set at the top of the tank body, and the tank liquid outlet is set at the side end of the tank body and on the same side as the filter element liquid outlet, that is, the opening direction of the tank liquid inlet and the tank liquid outlet is at right angles, which can ensure that the liquid (such as cut-off water) stays in the tank body cavity for a long time when it enters, so as to ensure the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a longitudinal sectional view of the liquid filtering device of the present utility model;

[0041] Figure 2 This is a right side view of the liquid filtering device described in the utility model;

[0042] Figure 3 The liquid filtering device described in this utility model Figure 1 Partial enlarged image.

[0043] Description of labels:

[0044] Tank body 1, filter element 2, tank cover 3, sealing structure 4, filter layer 5, tank liquid outlet 6, flange bolt 7, curved connecting arm 8, swing bolt 9, cotter pin 10, pin 11, nut 12, gasket 13, tank liquid inlet 1-1, exhaust port 1-2, sewage outlet 1-3, filter element liquid outlet 2-1, filter element liquid inlet filter hole 2-2, cleaning port 2-3, fixing plate 2-4, handle 3-1. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0046] like Figure 1-3As shown, the liquid filtering device described in the utility model comprises a tank body 1 with an open end and a hollow body, a filter element 2 movably installed in the inner cavity of the tank body 1, and a tank cover 3 movably closing the opening of the tank body 1, a tank liquid inlet 1-1 communicating with the inside and outside of the tank body 1 is provided on the top of the tank body 1, a tank liquid outlet 6 connected to an external delivery pipe is further provided on the side wall of the tank body 1, and a sewage outlet 1-3 communicating with the inside and outside of the tank body 1 is further provided on the bottom of the tank body 1; the filter element 2 is a hollow structure, and a gap is left between the outer wall of the filter element 2 and the inner wall of the tank body 1, and the filter element 2 is provided with a filter element liquid outlet 2-1 on the side wall near the tank body liquid outlet 6, and the tank body liquid outlet is connected to the filter element outlet The liquid port 2-1 is connected so that the inner cavity of the filter element 2 is connected with the outside of the tank body 1, and a sealing structure 4 is arranged between the tank cover 3 and the tank body 1, and between the filter element liquid outlet 2-1 and the tank body liquid outlet 6; a plurality of filter element liquid inlet filter holes 2-2 that pass through the side wall of the filter element are also spaced apart on the side wall of the filter element, and a filter layer 5 covering the filter element liquid inlet filter holes 2-2 is movably attached to the outer wall of the filter element 2; the liquid to be filtered flows into the gap between the inner wall of the tank body 1 and the outer wall of the filter element 2 from the tank body liquid inlet 1-1 in turn, and then flows into the inner cavity of the filter element 2 after being filtered through the filter layer 5 and the filter element liquid inlet filter hole 2-2 in turn, and then flows out of the tank body 1 through the tank body liquid outlet 6.

[0047] The filter layer 5 is a filter cloth with a mesh size of 250-350, and the pore size of the liquid inlet filter hole 2-2 of the filter element is 3-5 mm.

[0048] The filter element 2 is provided with a cleaning port 2 - 3 at one end thereof opposite to the filter element liquid outlet 2 - 1 , and the tank cover 3 closes the cleaning port 2 - 3 .

[0049] The tank body 1 and the filter element 2 are both extended in the transverse direction, the tank cover 3 is arranged at one transverse end of the tank body 1, and the tank body liquid outlet 6 is arranged at the other transverse end of the tank body 1.

[0050] The filter element 2 is provided with a cleaning port 2-3 on one end of the outer wall thereof, and a fixing plate 2-4 extending in the circumferential direction is fixed around the cleaning port 2-3. The fixing plate 2-4 is clamped between the opening edge of the tank body 1 and the tank cover 3 to fix the position of the filter element 2 in the tank body 1. The sealing structure 4 between the tank cover 3 and the tank body 1 is located between the fixing plate 2-4 and the tank cover 3 and between the fixing plate 2-4 and the opening edge of the tank body 1.

[0051] The sealing structure 4 is an O-ring.

[0052] The top of the tank body 1 is also provided with an exhaust port 1-2 for relieving the pressure of the tank body 1.

[0053] The opening of the tank body 1 is located on one lateral side wall of the tank body 1, and the tank cover 3 is movably connected to the tank body 1 by a flange bolt 7; the liquid filtering device also includes a curved connecting arm 8, one end of the curved connecting arm 8 is fixed to the outer wall of the tank body 1, and the other end extends to the outer side of the junction of the tank body 1 opening and the tank cover 3 and the end is provided with a through hole; a movable bolt 9 is also provided on the tank cover 3, one end of the eyelet of the movable bolt 9 is rotatably connected to the edge of the tank cover 3, and the other end extends out of the outer side of the tank cover 3 and can be movably penetrated with the through hole and locked by a nut, and the center line of the rotational connection between the movable bolt 9 and the edge of the tank cover 3 is perpendicular to the center line of the through hole.

[0054] At least one handle 3 - 1 is provided on the outer surface of the tank cover 3 for conveniently holding the tank cover 3 .

Claims

1. A liquid filtering device, characterized in that: The invention comprises a hollow tank body (1) with an opening at one end, a filter element (2) movably mounted in the inner cavity of the tank body (1), and a tank cover (3) movably closing the opening of the tank body (1); a tank body liquid inlet (1-1) communicating with the inside and outside of the tank body (1) is provided on the top of the tank body (1); a tank body liquid outlet (6) connected to an external delivery pipe is also provided on the side wall of the tank body (1); and a sewage outlet (1-3) communicating with the inside and outside of the tank body (1) is also provided on the bottom of the tank body (1); the filter element (2) is a hollow structure, with a gap between the outer wall of the filter element (2) and the inner wall of the tank body (1); a filter element liquid outlet (2-1) is provided on the side wall of the filter element (2) near the tank body liquid outlet (6); the tank body liquid outlet is connected to the filter element liquid outlet (2-1) to The inner cavity of the filter element (2) is connected to the outside of the tank body (1), and a sealing structure (4) is provided between the tank cover (3) and the tank body (1), and between the filter element liquid outlet (2-1) and the tank body liquid outlet (6); a plurality of filter element liquid inlet filter holes (2-2) penetrating the side wall of the filter element are also arranged at intervals, and a filter layer (5) covering the filter element liquid inlet filter holes (2-2) is movably attached to the outer wall of the filter element (2); the liquid to be filtered flows into the gap between the inner wall of the tank body (1) and the outer wall of the filter element (2) from the tank body liquid inlet (1-1), and then flows into the inner cavity of the filter element (2) after being filtered through the filter layer (5) and the filter element liquid inlet filter hole (2-2), and then flows out of the tank body (1) through the tank body liquid outlet (6).

2. The liquid filtering device according to claim 1, characterized in that: The filter layer (5) is a filter cloth with a mesh size of 250-350, and the pore size of the liquid inlet filter hole (2-2) of the filter element is 3-5 mm.

3. The liquid filtering device according to claim 1, characterized in that: A cleaning port (2-3) is provided at one end of the filter element (2) opposite to the filter element liquid outlet (2-1), and the tank cover (3) seals the cleaning port (2-3).

4. The liquid filtering device according to claim 1, characterized in that: The tank body (1) and the filter element (2) are both arranged to extend in the transverse direction, the tank cover (3) is arranged at one transverse end of the tank body (1), and the tank body liquid outlet (6) is arranged at the other transverse end of the tank body (1).

5. The liquid filtering device according to claim 3, characterized in that: A fixing plate (2-4) extending in the circumferential direction is fixedly arranged on the outer wall of one end of the filter element (2) provided with a cleaning port (2-3) around the cleaning port (2-3); the fixing plate (2-4) is sandwiched between the opening edge of the tank body (1) and the tank cover (3) to fix the position of the filter element (2) in the tank body (1); and a sealing structure (4) between the tank cover (3) and the tank body (1) is located between the fixing plate (2-4) and the tank cover (3) and between the fixing plate (2-4) and the opening edge of the tank body (1).

6. The liquid filtering device according to claim 1, 3 or 5, characterized in that: The sealing structure (4) is an O-type sealing ring.

7. The liquid filtering device according to claim 1, characterized in that: The top of the tank body (1) is also provided with an exhaust port (1-2) for relieving the pressure of the tank body (1).

8. The liquid filtering device according to claim 4, characterized in that: The opening of the tank body (1) is located on a transverse side wall of the tank body (1), and the tank cover (3) is movably connected to the tank body (1) through a flange bolt (7); the liquid filtering device also includes a curved connecting arm (8), one end of the curved connecting arm (8) is fixed on the outer wall of the tank body (1), and the other end extends to the outer side of the junction of the opening of the tank body (1) and the tank cover (3), and the end is provided with a through hole; the tank cover (3) is also provided with a movable bolt (9), one end of the hole of the movable bolt (9) is rotatably connected to the edge of the tank cover (3), and the other end extends out of the outer side of the tank cover (3) and can be movably penetrated with the through hole and locked by a nut, and the rotation connection center line of the movable bolt (9) and the edge of the tank cover (3) is perpendicular to the center line of the through hole.

9. The liquid filtering device according to claim 1, characterized in that: The outer surface of the can cover (3) is provided with at least one handle (3-1) for conveniently holding the can cover (3).

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