Textile slurry production filtering device and method based on membrane separation technology

Abstract

The invention relates to a textile size production filtering device and method based on a membrane separation technology, a feeding valve is used for controlling the flow of textile size in a feeding pipeline, a first filtering membrane and a second filtering membrane are made of separation membranes, a reflux pump is arranged above a first filtering shell, and a second filtering shell is arranged above a second filtering shell. One end of the reflux pipeline is communicated with the reflux pump, and the other end of the reflux pipeline is communicated with the feeding pipeline; the detection mechanism comprises a flow sensor, a pressure sensor and a controller, the flow sensor is arranged on the feeding pipeline, the flow sensor is used for detecting the flow of the feeding pipeline, the pressure sensor is installed on the first filtering membrane, the pressure sensor is used for detecting the pressure borne by the first filtering membrane, and the controller is used for controlling the pressure borne by the first filtering membrane. The flow sensor and the pressure sensor are electrically connected with the controller.

Description

Technical Field

[0001] The present invention relates to the technical field of textile slurry filtration, in particular to a textile slurry production filtration device and method based on membrane separation technology. Background Art

[0002] During the textile production process, the slurry needs to be cooled and condensed to produce fabrics. During the slurry processing process, the slurry needs to be filtered to remove large particles inside the slurry.

[0003] Prior art, such as the utility model patent with patent announcement number CN221451926U, discloses a textile slurry filtering device, comprising a device body, a top cover and a discharge pipe; the top cover is arranged on the top of the device body, and a discharge pipe is arranged at the bottom of the device body; a feed port is arranged on one side of the top of the device body; a connecting rod is arranged axially inside the device body, and a plurality of filter discs are arranged on the connecting rod, and the plurality of filter discs are layered along the vertical direction, and a plurality of filter holes are arranged on the filter disc; a control component is arranged on the top of the device body, and the control component is used to control the lifting and rotation of the filter disc; the present invention can filter impurities of different sizes by arranging multiple layers of filter discs, and the filter holes on each layer of filter discs have different sizes. In addition, the rotation of the filter disc is controlled by a power motor during the filtration process.

[0004] It can be seen that the existing textile slurry filtering device uses a metal filter plate, which is inconvenient to disassemble and cannot detect the filtering condition of the filter plate. After long-term use, the filtering effect of the top filter plate is poor. Summary of the Invention

[0005] In view of the above problems, the present invention provides a textile pulp production filtration device and method based on membrane separation technology, which is used to solve the technical problem that the filtration condition of the filter disc cannot be detected and the filtration effect of the top filter disc is poor after long-term use.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a textile pulp production filtration device based on membrane separation technology, comprising a device body, a feeding mechanism, a filtering mechanism, a pulp reflux mechanism, and a detection mechanism:

[0007] The device body includes a feed port, the feed mechanism includes a feed pipe and a feed valve, the feed pipe is connected to the feed port, the feed valve is arranged in the feed pipe, and the feed valve is used to control the flow of the textile slurry in the feed pipe;

[0008] The filtering mechanism includes a rotating support rod, a rotating motor, a first filter housing, a first filter membrane, a second filter housing and a second filter membrane, the first filter housing is rotatably arranged in the device body, the first filter membrane is arranged in the first filter housing, the second filter housing is rotatably arranged below the first filter housing, and the second filter membrane is arranged in the second filter housing, the rotating motor is transmission-connected to the rotating support rod, the rotating support rod is respectively connected to the first filter housing and the second filter housing, the rotating motor drives the first filter housing and the second filter housing to rotate through the rotating support rod, and the first filter membrane and the second filter membrane are made of separation membrane;

[0009] The slurry reflux mechanism includes a reflux pump and a reflux pipe, wherein the reflux pump is arranged above the first filter housing, one end of the reflux pipe is connected to the reflux pump, and the other end of the reflux pipe is connected to the feed pipe;

[0010] The detection mechanism includes a flow sensor, a pressure sensor and a controller. The flow sensor is arranged on the feed pipe. The flow sensor is used to detect the flow of the feed pipe. The pressure sensor is installed on the first filter membrane. The pressure sensor is used to detect the pressure exerted on the first filter membrane. The flow sensor and the pressure sensor are electrically connected to the controller respectively. The controller is connected to and controls the feed valve and the reflux pump. When the pressure sensor detects that the pressure exerted on the first filter membrane exceeds a preset value, the controller controls the feed valve to reduce the flow of the textile slurry in the feed pipe and / or controls the reflux pump to reflux the slurry.

[0011] As an embodiment of the present invention, a first circular track and a second circular track are provided in the body of the device, the first circular track is arranged above the second circular track, the first filter shell and the second filter shell are annular shells, the first filter shell can rotate on the first circular track, and the second filter shell can rotate on the second circular track.

[0012] As an embodiment of the present invention, the filtering mechanism further includes an annular leak-proof baffle, which is arranged above the gap between the outer wall of the first filtering shell and the inner wall of the device body, and the annular leak-proof baffle is connected to the inner wall of the device body.

[0013] As an embodiment of the present invention, the filtering mechanism also includes a first fixing frame and a second fixing frame, the first filter membrane is detachably set on the inner wall of the first filter housing through the first fixing frame, and the second filter membrane is detachably set on the inner wall of the second filter housing through the second fixing frame.

[0014] As an embodiment of the present invention, a first through hole for accommodating the rotation support rod is provided at the center of the first filter membrane, and a second through hole for accommodating the rotation support rod is provided at the center of the second filter membrane.

[0015] As an embodiment of the present invention, the center of the first filter membrane is concave downward, and the center of the second filter membrane is concave downward.

[0016] As an embodiment of the present invention, the first filter membrane is a polypropylene membrane, and the second filter membrane is a ceramic membrane.

[0017] As an embodiment of the present invention, a reflux cavity is provided on the side wall of the device body, the reflux pipe is provided in the reflux cavity, and the reflux pump is connected to the inner wall of the device body.

[0018] As an embodiment of the present invention, the textile pulp production filtration device further includes a discharge mechanism, the device body includes a discharge port, the discharge port is arranged at the bottom of the device body, the discharge mechanism includes a discharge pipe and a discharge valve, the discharge pipe is connected to the discharge port, the discharge valve is arranged in the discharge pipe, a support frame is provided at the bottom of the device body, the discharge mechanism further includes a collection tank, and the collection tank is arranged below the discharge pipe;

[0019] The detection mechanism also includes a wireless transmission module and a control terminal. The controller is also connected to and controls the rotating motor and the discharge valve. The controller is communicatively connected to the control terminal via the wireless transmission module.

[0020] Different from the existing technology, the above technical solution controls the flow rate of the textile slurry in the feed pipe through the feed valve, the first filter membrane and the second filter membrane are made of separation membrane, the reflux pump is arranged above the first filter shell, one end of the reflux pipe is connected to the reflux pump, and the other end of the reflux pipe is connected to the feed pipe; the detection mechanism includes a flow sensor, a pressure sensor and a controller, the flow sensor is arranged on the feed pipe, the flow sensor is used to detect the flow rate of the feed pipe, the pressure sensor is installed on the first filter membrane, the pressure sensor is used to detect the pressure exerted on the first filter membrane, the flow sensor and the pressure sensor are electrically connected to the controller respectively, the controller is connected to and controls the feed valve and the reflux pump, when the pressure sensor detects that the pressure exerted on the first filter membrane exceeds a preset value, the controller controls the feed valve to reduce the flow rate of the textile slurry in the feed pipe and / or the controller controls the reflux pump to reflux the slurry. In this way, the first filter membrane and the second filter membrane are made of a separation membrane. After filtration by the filter membrane, large particles inside the slurry are retained on the filter membrane. After long-term use, the weight borne by the filter membrane increases, and the pressure sensor detects the pressure borne by the first filter membrane. When the pressure reaches the preset value, the controller reduces the flow rate of the textile slurry in the feed pipe or controls the reflux pump to reflux the slurry, thereby reducing the pressure borne by the first filter membrane. When the pressure reaches the limit value that the first filter membrane can withstand, the first filter membrane needs to be replaced to improve the filtration effect.

[0021] To achieve the above object, in a second aspect, the present invention provides a textile pulp production filtration method based on membrane separation technology, comprising: a textile pulp production filtration device based on membrane separation technology as described in any one of the above, comprising the following steps:

[0022] S1. Open the feed valve, and the flow sensor detects the flow of the textile slurry in the feed pipe, and controls the flow of the textile slurry in the feed pipe to be within a preset range;

[0023] S2. Turning on the rotary motor drives the first filter housing and the second filter housing to rotate, thereby driving the first filter membrane and the second filter membrane to rotate to filter the textile slurry;

[0024] S3. The pressure sensor detects the pressure on the first filter membrane. When the pressure on the first filter membrane exceeds a first preset value, the controller controls the feed valve to reduce the flow rate of the textile slurry in the feed pipe, or controls the reflux pump to reflux the slurry.

[0025] S4. When the pressure value borne by the first filter membrane exceeds the second preset value, the controller closes the feed valve and issues an alarm.

[0026] Different from the existing technology, the technical solution of the present invention detects the pressure borne by the first filter membrane through a pressure sensor. When the pressure reaches a first preset value, the controller reduces the flow rate of the textile slurry in the feed pipe and / or controls the reflux pump to reflux the slurry, thereby reducing the pressure borne by the first filter membrane. When the pressure reaches the limit value that the first filter membrane can withstand, the feeding is stopped and an alarm is sounded to remind that the first filter membrane needs to be replaced to improve the filtering effect.

[0027] The above-mentioned description of the invention content is only an overview of the technical solution of the present invention. In order to enable ordinary technicians in this field to more clearly understand the technical solution of the present invention, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned objects and other objects, features and advantages of the present invention easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only used to illustrate the principles, implementations, applications, features, and effects of the specific embodiments of the present invention and other related contents, and are not to be considered as limiting the present invention.

[0029] In the drawings of the specification:

[0030] Figure 1 This is a schematic structural diagram of a textile pulp production filtration device based on membrane separation technology according to one embodiment of the present invention;

[0031] Figure 2 This is a schematic structural diagram of a first filter housing according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic structural diagram of a first filter membrane according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic structural diagram of a filtering mechanism according to an embodiment of the present invention;

[0034] Figure 5 A partial schematic diagram of a filtering mechanism according to an embodiment of the present invention;

[0035] Figure 6 This is a principle block diagram of a textile pulp production filtration device based on membrane separation technology according to an embodiment of the present invention.

[0036] The reference numerals in the above drawings are described as follows:

[0037] 1. Device body; 11. Feed port; 12. Discharge port; 13. First annular track; 14. Second annular track; 15. Reflux chamber; 16. Support frame;

[0038] 2. Feed mechanism; 22. Slurry pump; 23. Feed pipe; 24. Feed valve;

[0039] 31. Rotating support rod; 32. Rotating motor; 33. First filter housing; 34. First filter membrane; 35. Second filter housing; 36. Second filter membrane; 37. Annular leak-proof baffle; 38. First fixing bracket; 39. First through hole;

[0040] 4. Slurry reflux mechanism; 41. Reflux pump; 42. Reflux pipeline;

[0041] 5. Discharge mechanism; 51. Discharge pipe; 52. Discharge valve;

[0042] 6. Detection mechanism; 61. Flow sensor; 62. Pressure sensor; 63. Controller; 64. Wireless transmission module; 65. Control terminal. DETAILED DESCRIPTION

[0043] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of the present invention, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0044] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the term "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present invention, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0045] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0046] In the present description, the term "and / or" is used to describe a logical relationship between objects, indicating that three possible relationships exist. For example, X and / or Y means: X exists, Y exists, and both X and Y exist. Furthermore, the character " / " generally indicates that the objects are in a logical "or" relationship.

[0047] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0048] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0049] Consistent with the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of the present invention, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0050] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention.

[0051] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, terms such as "installed," "connected," "connected," "fixed," and "set" should be understood in a broad sense. For example, the "connection" may refer to a fixed connection, a detachable connection, or an integrated arrangement; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components or an interaction between two components. Those skilled in the art of the present invention will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0052] According to some embodiments of the present invention, see Figures 1 to 6This embodiment relates to a textile pulp production filtration device based on membrane separation technology, including a device body 1, a feeding mechanism 2, a filtering mechanism, a pulp reflux mechanism 4, a discharging mechanism 5, and a detection mechanism 6:

[0053] The device body 1 includes a feed port 11, and the feed mechanism 2 includes a slurry pump 22, a feed pipe 23, and a feed valve 24. The slurry pump 22 is connected to one end of the feed pipe 23, and the other end of the feed pipe 23 is connected to the feed port 11. The feed valve 24 is arranged in the feed pipe 23 and is used to control the flow rate of the textile slurry in the feed pipe 23.

[0054] The filtering mechanism includes a rotating support rod 31, a rotating motor 32, a first filter housing 33, a first filter membrane 34, a second filter housing 35 and a second filter membrane 36. The first filter housing 33 is rotatably arranged in the device body 1, the first filter membrane 34 is arranged in the first filter housing 33, the second filter housing 35 is rotatably arranged below the first filter housing 33, and the second filter membrane 36 is arranged in the second filter housing 35. The rotating motor 32 is arranged on the device body 1 and is transmission-connected to the rotating support rod 31. The rotating support rod 31 is respectively connected to the first filter housing 33 and the second filter housing 35. The rotating motor 32 drives the first filter housing 33 and the second filter housing 35 to rotate through the rotating support rod 31. The first filter membrane 34 and the second filter membrane 36 are made of separation membranes.

[0055] The slurry reflux mechanism 4 includes a reflux pump 41 and a reflux pipe 42. The reflux pump 41 is arranged above the first filter housing 33. One end of the reflux pipe 42 is connected to the reflux pump 41, and the other end of the reflux pipe 42 is connected to the feed pipe 23.

[0056] The device body 1 includes a discharge port 12, which is arranged at the bottom of the device body 1. The discharge mechanism 5 includes a discharge pipe 51 and a discharge valve 52. The discharge pipe 51 is connected to the discharge port 12, and the discharge valve 52 is arranged in the discharge pipe 51.

[0057] The detection mechanism 6 includes a flow sensor 61, a pressure sensor 62 and a controller 63. The flow sensor 61 is arranged on the feed pipe 23. The flow sensor 61 is used to detect the flow of the feed pipe 23. The pressure sensor 62 is installed on the first filter membrane 34. The pressure sensor 62 is used to detect the pressure exerted on the first filter membrane 34. The flow sensor 61 and the pressure sensor 62 are electrically connected to the controller 63 respectively. The controller 63 is connected to and controls the feed valve 24 and the reflux pump 41. When the pressure sensor 62 detects that the pressure exerted on the first filter membrane 34 exceeds a preset value, the controller 63 controls the feed valve 24 to reduce the flow rate of the textile pulp in the feed pipe 23 and / or the controller 63 controls the reflux pump 41 to reflux the pulp.

[0058] In some embodiments, the slurry reflux mechanism 4 is used to return part of the textile slurry to the feeding mechanism 2 when the pressure of the first filter membrane 34 is too high, so as to reduce the pressure of the first filter housing 33 and protect the first filter membrane 34 .

[0059] In some embodiments, the discharge mechanism 5 collects the purified slurry after filtration, and the discharge pipe 51 and the discharge valve 52 control the outflow and storage of the purified slurry.

[0060] The first filter housing 33 and the second filter housing 35 are used to fix and protect the first filter membrane 34 and the second filter membrane 36. The first filter housing 33 and the second filter housing 35 are a disk slightly concave toward the center of the circle, which is slightly smaller than the inner diameter of the device body 1. The rotating motor 32 provides power for the support rod. The rotating motor 32 mobilizes the support rod to rotate, driving the first filter housing 33 and the second filter housing 35 to rotate slowly along the circular track on the inner wall of the device body 1. It has two functions: one is to prevent the filtered impurities from accumulating on the filter membrane and affecting the filtering effect; the other is to increase the filtration rate.

[0061] The rotation speed of the rotating motor 32 should not be too fast and should be controlled within the range of 10 to 30 RPM to prevent the centrifugal effect from throwing out the slurry and damaging the filter membrane. The flow rate of the feed pipe 23 should not be too fast to prevent the slurry from accumulating on the filter membrane, affecting the filtration effect and squeezing the filter housing. The flow sensor 61 is set to a threshold of 25 L / min, and the pressure sensor 62 is set to a threshold of 1.5 bar. The degree of concavity of the filter housing toward the center should not be too large to prevent the slurry from accumulating near the center and not functioning near the edge. Therefore, the degree of concavity is controlled to be 0.01 to 0.11 / m (curvature unit, 1 / length). The first filter membrane 34 initially filters large particles of impurities in the slurry, reducing the burden on subsequent filter membranes. Therefore, the pore size is set to 5 to 10 μm. The second filter membrane 36 further purifies the slurry to meet the use standard. Therefore, the pore size is set to 0.1 to 1 μm.

[0062] The filter membrane is designed to be easy to disassemble, and only the filter membrane can be cleaned when using the same textile pulp.

[0063] In this embodiment, the first filter membrane 34 and the second filter membrane 36 can be replaced by disassembling the first filter housing 33 and the second filter housing 35, or the first filter membrane 34 and the second filter membrane 36 can be disassembled separately. Disassembling the first filter housing 33 and the second filter housing 35 is more efficient than disassembling the first filter membrane 34 and the second filter membrane 36.

[0064] The feed valve 24 is used to control the flow of the textile pulp in the feed pipe 23. The first filter membrane 34 and the second filter membrane 36 are made of separation membranes. The reflux pump 41 is arranged above the first filter housing 33. One end of the reflux pipe 42 is connected to the reflux pump 41, and the other end of the reflux pipe 42 is connected to the feed pipe 23. The detection mechanism 6 includes a flow sensor 61, a pressure sensor 62 and a controller 63. The flow sensor 61 is arranged on the feed pipe 23 and is used to detect the flow of the feed pipe 23. The pressure sensor 62 is installed on the first filter membrane 34 and is used to detect the pressure exerted on the first filter membrane 34. The flow sensor 61 and the pressure sensor 62 are respectively electrically connected to the controller 63. The controller 63 is connected to and controls the feed valve 24 and the reflux pump 41. When the pressure sensor 62 detects that the pressure exerted on the first filter membrane 34 exceeds a preset value, the controller 63 controls the feed valve 24 to reduce the flow of the textile pulp in the feed pipe 23 and / or controls the reflux pump 41 to reflux the pulp.

[0065] In this way, the first filter membrane 34 and the second filter membrane 36 are made of a separation membrane. After filtration by the filter membrane, large particles inside the slurry are retained on the filter membrane. After long-term use, the weight borne by the filter membrane increases, and the pressure sensor 62 detects the pressure borne by the first filter membrane 34. When the pressure reaches the preset value, the controller 63 reduces the flow rate of the textile slurry in the feed pipe 23 or controls the reflux pump 41 to reflux the slurry, thereby reducing the pressure borne by the first filter membrane 34. When the pressure reaches the limit value that the first filter membrane 34 can withstand, the first filter membrane 34 needs to be replaced to improve the filtering effect.

[0066] According to some embodiments of the present invention, optionally, a first annular track 13 and a second annular track 14 are provided in the device body 1, the first annular track 13 is provided above the second annular track 14, the first filter housing 33 and the second filter housing 35 are annular housings, the first filter housing 33 can rotate on the first annular track 13, and the second filter housing 35 can rotate on the second annular track 14.

[0067] In this way, the first and second annular tracks 13 and 14 facilitate the rotation of the first and second filter housings 33 and 35 . The first and second annular tracks 13 and 14 can be mounted on the device body 1 by bolts, making maintenance of the device body 1 convenient.

[0068] According to some embodiments of the present invention, optionally, Figure 4 As shown, the filtering mechanism further includes an annular anti-leakage baffle 37 , which is disposed above the gap between the outer wall of the first filtering housing 33 and the inner wall of the device body 1 , and is connected to the inner wall of the device body 1 .

[0069] In this embodiment, an annular anti-leakage baffle 37 is provided above the gap between the first filter housing 33 , the second filter housing 35 and the inner wall of the device body 1 .

[0070] In this way, since the first filter shell 33 and the second filter shell 35 need to rotate around the inner wall of the device body 1, a gap is provided between the first filter shell 33, the second filter shell 35 and the inner wall of the device body 1. In order to prevent the textile slurry from flowing into the lower space through the gap, an annular leak-proof baffle 37 is provided above the gap between the first filter shell 33, the second filter shell 35 and the inner wall of the device body 1 to prevent the textile slurry from flowing into the lower space through the gap, thereby improving the filtering effect.

[0071] According to some embodiments of the present invention, optionally, Figure 2 As shown, the filtering mechanism also includes a first fixing frame 38 and a second fixing frame. The first filter membrane 34 is detachably arranged on the inner wall of the first filter housing 33 through the first fixing frame 38, and the second filter membrane 36 is detachably arranged on the inner wall of the second filter housing 35 through the second fixing frame.

[0072] The first fixing frame 38 is arranged in a crisscross pattern to support the bottom of the first filter membrane 34 .

[0073] In this way, since the first filter membrane 34 and the second filter membrane 36 are elastic, the first filter membrane 34 and the second filter membrane 36 are supported by the first fixing frame 38 and the second fixing frame to prevent the slurry from accumulating on the first filter membrane 34 and the second filter membrane 36, thereby preventing the first filter membrane 34 and the second filter membrane 36 from being deformed too much and causing the first filter membrane 34 and the second filter membrane 36 to rupture.

[0074] According to some embodiments of the present invention, optionally, a first through hole 39 for accommodating the rotation support rod 31 is provided at the center of the first filter membrane 34 , and a second through hole for accommodating the rotation support rod 31 is provided at the center of the second filter membrane 36 .

[0075] In some embodiments, the first through hole 39, the second through hole and the support rod need to be sealed to prevent the textile pulp from entering the lower space through the gaps.

[0076] In this way, the support rod can conveniently drive the first filter membrane 34 and the second filter membrane 36 to rotate. Specifically, the support rod drives the first fixing frame 38 and the second fixing frame to rotate, thereby driving the first filter housing 33, the second filter housing 35, the first filter membrane 34, and the second filter membrane 36 to rotate together.

[0077] According to some embodiments of the present invention, optionally, the center of the first filter membrane 34 is concave downward, and the center of the second filter membrane 36 is concave downward.

[0078] In this way, the slurry can be made to sink toward the center of the first filter membrane 34 and the center of the second filter membrane 36, and the slurry can be filtered by centrifugal force, thereby improving the filtering effect.

[0079] According to some embodiments of the present invention, optionally, the first filter membrane 34 is a polypropylene membrane, and the second filter membrane 36 is a ceramic membrane.

[0080] Membrane separation technology uses semipermeable membranes to selectively separate substances. Based on pore size, it is categorized into microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO), electrodialysis (RO), and gas separation membranes. Considering that the diameter of the impurity particles to be filtered is at the micron level, microfiltration is sufficient. In addition, there are many factors that restrict the selection of filtration membrane materials, the most important of which are as follows:

[0081] 1. Cost: Filtration membranes are usually made of high-performance materials (such as polymers, ceramics or composite materials). The membrane manufacturing process also involves expensive technologies and equipment, such as phase inversion, stretching, coating and high-temperature treatment.

[0082] 2. Heat and corrosion resistance: During the production of textile slurry, a sealed and dust-free environment is required, and the slurry temperature may reach 60°C to 80°C. In addition, some additives added to the slurry may contain oxidants. Will this cause oxidation to the filter membrane?

[0083] 3. Chemical properties: Will the filter membrane react chemically with one or more additives in the textile slurry (the main components of textile slurry, starch, natural polymers or synthetic polymers usually do not react chemically with the membrane material). For example, some strong acid and strong alkali textile slurries will react with polyester (PET) and polyether urea (PEBA) to degrade them, causing them to lose their integrity.

[0084] Taking into account the above factors, three filter membrane materials were selected for consideration:

[0085] 1. Polyamide membrane (nylon)

[0086] Chemical resistance: Polyamide is generally resistant to weak acids and weak bases, but is relatively less sensitive to strong acids, strong bases and oxidants;

[0087] Slurry influence: If the slurry contains strong acid or strong base components, it may affect the performance of the polyamide membrane;

[0088] Heat resistance: Excellent temperature resistance, can operate at higher temperatures (about 90°C).

[0089] 2. Polypropylene film

[0090] Chemical stability: Polypropylene has good tolerance to most additives, but may be unstable to some organic solvents;

[0091] Sizing effect: Generally, textile sizing has little effect on it, but care should be taken to avoid prolonged contact with strong oxidants;

[0092] Heat resistance: Generally suitable for operating environments below 80°C.

[0093] 3. Ceramic membrane

[0094] Chemical resistance: Ceramic membranes generally have excellent acid and alkali resistance and chemical stability;

[0095] Slurry influence: Most textile slurries will not chemically react with ceramic membranes, but physical wear must be prevented;

[0096] Heat resistance: It can withstand high temperatures (over 100°C) and is very suitable for high-temperature operations.

[0097] Although polyamide membranes are relatively less sensitive to strong acids, strong bases, and oxidants, this may affect their performance. Polypropylene membranes have good tolerance to most additives and are suitable for operating environments below 80°C, so they can be used as the filter membrane for the first filter layer. Ceramic membranes have excellent acid and alkali resistance and chemical stability. Most textile pulps will not react chemically with ceramic membranes and can withstand high temperatures (≥100°C). They are the best filter membrane choice and are therefore used as the filter membrane for the second filter layer.

[0098] According to some embodiments of the present invention, optionally, a reflux cavity 15 is provided on the side wall of the device body 1 , a reflux pipe 42 is provided in the reflux cavity 15 , and a reflux pump 41 is connected to the inner wall of the device body 1 .

[0099] In some embodiments, the reflux chamber 15 can be integrally formed with the device body 1 , or a separate reflux chamber 15 can be provided through a partition to facilitate reducing the pressure of the first filter housing 33 and protecting the first filter membrane 34 .

[0100] According to some embodiments of the present invention, optionally, a support frame 16 is provided at the bottom of the device body 1, and the discharge mechanism 5 further includes a collection tank, which is provided below the discharge pipe 51;

[0101] The detection mechanism 6 also includes a wireless transmission module 64 and a control terminal 65 . The controller 63 is also connected to and controls the slurry pump 22 , the rotating motor 32 and the discharge valve 52 . The controller 63 is communicatively connected to the control terminal 65 via the wireless transmission module 64 .

[0102] The support frame 16 is used to conveniently support the bottom of the device body 1, and the collection tank is used to conveniently collect the filtered slurry.

[0103] The flow sensor 61, the pressure sensor 62 and the control terminal 65 are connected to the same local area network (WLAN) via Wi-Fi, and radio frequency (RF) technology is used to transmit data in real time. The control terminal 65 can set parameters.

[0104] In this embodiment, a first pressure sensor 62 can be provided on the first filter membrane 34, and the first pressure sensor 62 is connected to the controller 63 to detect the pressure that the first filter membrane 34 can withstand. The slurry is refluxed or the feed flow rate is reduced according to the first pressure sensor 62. When the pressure reaches the limit value that the first filter membrane 34 can withstand, the first filter membrane 34 can be removed to replace or clean the first filter membrane 34; a second pressure sensor 62 can be provided on the second filter membrane 36, and the second pressure sensor 62 is connected to the controller 63 to detect the pressure that the second filter membrane 36 can withstand. When the pressure reaches the limit value that the second filter membrane 36 can withstand, the second filter membrane 36 can be removed to replace or clean the first filter membrane 34 to improve the filtering effect.

[0105] The controller 63 controls the slurry pump 22 , the feed valve 24 , the reflux pump 41 , the rotary motor 32 and the discharge valve 52 according to actual conditions.

[0106] This embodiment also relates to a textile pulp production filtration method based on membrane separation technology, comprising: a textile pulp production filtration device based on membrane separation technology as described above, comprising the following steps:

[0107] S1. Open the feed valve 24, and the flow sensor 61 detects the flow of the textile slurry in the feed pipe 23, and controls the flow of the textile slurry in the feed pipe 23 to be within a preset range;

[0108] S2. Turn on the rotary motor 32, which drives the first filter housing 33 and the second filter housing 35 to rotate, thereby driving the first filter membrane 34 and the second filter membrane 36 to rotate to filter the textile slurry;

[0109] S3. The pressure sensor 62 detects the pressure on the first filter membrane 34. When the pressure on the first filter membrane 34 exceeds a first preset value, the controller 63 controls the feed valve 24 to reduce the flow rate of the textile slurry in the feed pipe 23, or controls the reflux pump 41 to reflux the slurry.

[0110] S4. When the pressure value borne by the first filter membrane 34 exceeds the second preset value, the controller 63 closes the feed valve 24 and issues an alarm.

[0111] Different from the prior art, the technical solution of the present invention detects the pressure borne by the first filter membrane 34 through a pressure sensor 62. When the pressure reaches a first preset value, the controller 63 reduces the flow rate of the textile slurry in the feed pipe 23 and / or controls the reflux pump 41 to reflux the slurry, thereby reducing the pressure borne by the first filter membrane 34. When the pressure reaches the limit value that the first filter membrane 34 can withstand, the feeding is stopped and an alarm is sounded to remind that the first filter membrane 34 needs to be replaced to improve the filtering effect.

[0112] In this embodiment, a sensor uses a sensitive element and a conversion element to convert a specific measured signal into a usable signal according to a specific pattern and output it to meet the requirements of information transmission, processing, recording, display, and control. The sensor can sense physical quantities such as force, temperature, light, sound, and chemical composition, and can convert these quantities into electrical quantities such as voltage and current according to specific patterns, or into the on / off state of a circuit. A sensor generally consists of a sensitive element and a conversion element and is the primary link in achieving automatic detection and automatic control. The function of a sensor is to convert non-electrical quantities into electrical quantities or the on / off state of a circuit, thereby enabling convenient measurement, transmission, processing, and control.

[0113] In this embodiment, the controller receives signals from sensors and controls actuators or units accordingly. The controller is the master device that controls the starting, speed regulation, braking, and reversing of the motor by changing the wiring and resistance values ​​of the main or control circuits in a predetermined sequence. Composed of a program counter, instruction register, instruction decoder, timing generator, and operation controller, it serves as the "decision-making body" that issues commands, effectively coordinating and directing the operations of the entire computer system.

[0114] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, based on the innovative concept of the present invention, changes and modifications to the embodiments described herein, or equivalent structural or equivalent process transformations made using the contents of the present invention's specification and drawings, and direct or indirect application of the above technical solutions to other related technical fields, are all included in the scope of patent protection of the present invention.

Claims

1. A textile pulp production filtration device based on membrane separation technology, characterized in that: It includes a device body, a feeding mechanism, a filtering mechanism, a slurry reflux mechanism and a detection mechanism; The device body includes a feed port, the feed mechanism includes a feed pipe and a feed valve, the feed pipe is connected to the feed port, and the feed valve is arranged in the feed pipe; The filtering mechanism includes a rotating support rod, a rotating motor, a first filter housing, a first filter membrane, a second filter housing and a second filter membrane, the first filter housing is rotatably arranged in the device body, the first filter membrane is arranged in the first filter housing, the second filter housing is rotatably arranged below the first filter housing, and the second filter membrane is arranged in the second filter housing, the rotating motor is transmission-connected to the rotating support rod, the rotating support rod is respectively connected to the first filter housing and the second filter housing, the rotating motor drives the first filter housing and the second filter housing to rotate through the rotating support rod, and the first filter membrane and the second filter membrane are made of separation membrane; The slurry reflux mechanism includes a reflux pump and a reflux pipe, wherein the reflux pump is arranged above the first filter housing, one end of the reflux pipe is connected to the reflux pump, and the other end of the reflux pipe is connected to the feed pipe; The detection mechanism includes a flow sensor, a pressure sensor and a controller. The flow sensor is arranged on the feed pipe, and the pressure sensor is installed on the first filter membrane. The flow sensor and the pressure sensor are electrically connected to the controller respectively. The controller is connected to and controls the feed valve and the reflux pump. When the pressure sensor detects that the pressure on the first filter membrane exceeds a preset value, the controller controls the feed valve to reduce the flow rate of the textile slurry in the feed pipe and / or the controller controls the reflux pump to reflux the slurry.

2. The textile pulp production filtration device based on membrane separation technology according to claim 1, characterized in that: The device body is provided with a first annular track and a second annular track. The first annular track is arranged above the second annular track. The first filter shell and the second filter shell are annular shells. The first filter shell can rotate on the first annular track, and the second filter shell can rotate on the second annular track.

3. The textile pulp production filtration device based on membrane separation technology according to claim 2, characterized in that: The filtering mechanism further includes an annular anti-leakage baffle, which is arranged above the gap between the outer wall of the first filtering shell and the inner wall of the device body, and is connected to the inner wall of the device body.

4. The textile pulp production filtration device based on membrane separation technology according to claim 3, characterized in that: The filtering mechanism further includes a first fixing frame and a second fixing frame. The first filter membrane is detachably mounted on the inner wall of the first filter housing via the first fixing frame. The second filter membrane is detachably mounted on the inner wall of the second filter housing via the second fixing frame.

5. The textile pulp production filtration device based on membrane separation technology according to claim 4, characterized in that: A first through hole for accommodating the rotation support rod is provided at the center of the first filter membrane, and a second through hole for accommodating the rotation support rod is provided at the center of the second filter membrane.

6. The textile pulp production filtration device based on membrane separation technology according to claim 5, characterized in that: The center of the first filter membrane is concave downward, and the center of the second filter membrane is concave downward.

7. The textile pulp production filtration device based on membrane separation technology according to claim 6, characterized in that: The first filter membrane is a polypropylene membrane, and the second filter membrane is a ceramic membrane.

8. The textile pulp production filtration device based on membrane separation technology according to claim 1, characterized in that: A reflux cavity is provided on the side wall of the device body, the reflux pipe is provided in the reflux cavity, and the reflux pump is connected to the inner wall of the device body.

9. The textile pulp production filtration device based on membrane separation technology according to claim 1, characterized in that: The textile pulp production filtration device further includes a discharge mechanism, the device body includes a discharge port, the discharge port is arranged at the bottom of the device body, the discharge mechanism includes a discharge pipe and a discharge valve, the discharge pipe is connected to the discharge port, the discharge valve is arranged in the discharge pipe, a support frame is provided at the bottom of the device body, the discharge mechanism further includes a collection tank, and the collection tank is arranged below the discharge pipe; The detection mechanism also includes a wireless transmission module and a control terminal. The controller is also connected to and controls the rotating motor and the discharge valve. The controller is communicatively connected to the control terminal via the wireless transmission module.

10. A textile pulp production filtration method based on membrane separation technology, characterized in that: include: The textile pulp production filtration device based on membrane separation technology according to any one of claims 1 to 9 comprises the following steps: S1. Open the feed valve, and the flow sensor detects the flow of the textile slurry in the feed pipe, and controls the flow of the textile slurry in the feed pipe to be within a preset range; S2. Turning on the rotary motor drives the first filter housing and the second filter housing to rotate, thereby driving the first filter membrane and the second filter membrane to rotate to filter the textile slurry; S3. The pressure sensor detects the pressure on the first filter membrane. When the pressure on the first filter membrane exceeds a first preset value, the controller controls the feed valve to reduce the flow rate of the textile slurry in the feed pipe, or controls the reflux pump to reflux the slurry. S4. When the pressure value borne by the first filter membrane exceeds the second preset value, the controller closes the feed valve and issues an alarm.

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