Coffee production wastewater treatment device and treatment method

Abstract

The invention discloses a coffee production wastewater treatment device and method, and relates to the field of coffee production wastewater treatment.The coffee production wastewater treatment device comprises a filter bin and a filter cartridge, one end of the filter cartridge is provided with an opening, the filter cartridge is rotationally installed in the filter bin, the rotating joint of the filter cartridge and the filter bin is sealed, and the filter bin and the filter cartridge form a first cavity which is connected with a negative pressure device; an included angle is formed between the central axis of the filter cylinder and the horizontal plane, sealing pieces are installed on the peripheral side of the filter cylinder in an annular array shape, a sealing ring plate is arranged on the upper side of the filter cylinder, and when the filter cylinder rotates, the sealing pieces located at the sealing ring plate and the inner wall of the sealing pieces slide in a sealing mode. The cleaning piece is mounted on the inner side of the sealing ring plate; according to the coffee production wastewater treatment device and treatment method, through the synergistic effect of negative pressure driving and filter drum rotation, filter surfaces are continuously changed in turns, a sealing ring plate area negative pressure relieving mechanism is combined, the blocking rate caused by wall sticking of pectin in wastewater is reduced, and the stability of the filter efficiency is maintained.

Description

Technical Field

[0001] The present invention relates to a coffee production wastewater treatment technology, and in particular to a coffee production wastewater treatment device and a treatment method. Background Art

[0002] Coffee production wastewater contains a large amount of solid impurities such as peels and pulp, as well as high-viscosity pectin. Existing technology typically uses screens or filter cartridges for primary filtration, but pectin easily adheres and clogs the filter pores, causing a sharp drop in filtration efficiency. For example, Chinese utility model patent publication number CN216445146U discloses a coffee fresh fruit processing wastewater regulating tank. Although a screening trough is provided in the regulating tank to intercept solid impurities, it cannot effectively solve the problem of filter pore clogging caused by pectin, as the properties of colloidal substances make it difficult to scrape off. Conventional backwashing technology is difficult to effectively remove pectin from the filter pores due to the high viscous resistance of the wastewater, forcing frequent shutdowns for cleaning. Furthermore, chemical cleaning agents are prone to secondary pollution. Especially when the viscosity of coffee wastewater is very high, the lifespan of traditional filtration devices is often short, and maintenance costs are significantly increased. Summary of the Invention

[0003] The purpose of the present invention is to provide a coffee production wastewater treatment device and treatment method to solve the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coffee production wastewater treatment device, comprising a filter bin and a filter cartridge, wherein one end of the filter cartridge has an opening, and wastewater is transported into the filter cartridge from the opening. The filter cartridge is rotatably installed in the filter bin, and its rotating connection is sealed. The filter bin and the filter cartridge form a first cavity, and the first cavity is connected to a negative pressure device for putting the first cavity in a negative pressure state. The central axis of the filter cartridge is arranged at an angle to the horizontal plane, and a seal is installed in an annular array around the filter cartridge. A sealing ring plate is provided on the upper side of the filter cartridge. When the filter cartridge rotates, the seal at the sealing ring plate slides sealed with its inner wall, and a scraper and a cleaning member are sequentially arranged along the rotation direction of the filter cartridge. The scraper is located inside the filter cartridge, and the cleaning member is installed on the inner side of the sealing ring plate.

[0005] Furthermore, the filter cartridge is connected to a driving member for driving the filter cartridge to rotate around its own axis.

[0006] Furthermore, the scraper includes a scraper and a collecting trough. The scraper is arranged along the axial direction of the filter cartridge, and the scraper abuts against the inner wall of the filter cartridge or has a gap. The collecting trough is located below the scraper and is used to collect objects scraped from the inner wall of the filter cartridge.

[0007] Furthermore, the cleaning component includes a plurality of nozzles, and a receiving cavity for accommodating each nozzle is opened on the inner side of the sealing ring plate. The nozzle is used to spray fluid, and the fluid moves along the radial direction of the filter cartridge to push the liquid on the inner wall of the filter cartridge toward the inside.

[0008] Furthermore, the fluid is liquid, and a first pipe is provided on one side of the sealing ring plate. One end of the first pipe is connected to the accommodating cavity, and the other end is connected to the scraper. A first flow channel is opened in the scraper, and a plurality of liquid outlet holes are opened on the side of the scraper opposite to the rotation direction of the filter cartridge, and the liquid outlet holes are connected to the first flow channel.

[0009] Furthermore, the filter cartridge includes a base and ribs installed on the base and distributed in an annular array, filter plates are installed between adjacent ribs, and sealing members are installed on the ribs.

[0010] Furthermore, the sealing member includes a sealing strip and an elastic component, the sealing strip is slidably connected to the inner wall of the rib, and the elastic component is arranged between the sealing strip and the rib.

[0011] Furthermore, there are at least six ribs, and after two adjacent ribs enter the sealing ring plate area, the scraper enters the filter plate area between the two ribs.

[0012] Furthermore, the diameter of the filter cartridge gradually increases from the opening.

[0013] A coffee production wastewater treatment method, applicable to the coffee production wastewater treatment device as described above, specifically comprises the following steps: S1, transporting wastewater from coffee production into the filter cartridge; S2, the filter cartridge rotates and performs filtering under the negative pressure of the first cavity; S3, scraper scrapes the filter residue from the inner wall of the filter cartridge and collects it; S4, then the cleaning element sprays fluid radially toward the inner wall of the filter cartridge to remove the blockage of the filter holes; S5. The cleaned filter cartridge is circulated for negative pressure filtration to continuously treat the wastewater.

[0014] Compared with the prior art, the coffee production wastewater treatment device and treatment method provided by the present invention have the following beneficial effects: 1. The coffee production wastewater treatment device and treatment method continuously rotate the filter surface through the synergistic effect of negative pressure drive and filter cartridge rotation. Combined with the negative pressure release mechanism in the sealing ring plate area, the blockage rate caused by pectin in the wastewater sticking to the wall is reduced, and the filtration efficiency is maintained stable.

[0015] 2. The coffee production wastewater treatment device and treatment method, through the synergistic effect of the seal and the sealing ring plate, when the seal rotates with the filter cartridge and enters the sealing ring plate area, forms a second cavity relatively isolated from the first cavity, so that the filter cartridge portion in this area is out of the negative pressure state or the degree of negative pressure is reduced, thereby reducing the adsorption force of substances such as pectin on the inner wall of the filter cartridge, and the scraping resistance of the scraper is also reduced, and equipment wear is reduced; at the same time, in this negative pressure release area, the fluid recoil pressure of the cleaning component is not offset by negative pressure or is partially offset, and the water flow penetration efficiency is improved to a certain extent, which is conducive to reducing the filter pore blockage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure; Figure 3 A schematic diagram of the internal structure of a filter cartridge provided in an embodiment of the present invention; Figure 4 A schematic diagram of the arrangement position of the scraper provided in an embodiment of the present invention; Figure 5 A schematic diagram of the location of the cleaning element provided in an embodiment of the present invention; Figure 6 A schematic diagram of the partial structure of a scraper provided in an embodiment of the present invention.

[0018] Description of reference numerals: 1. Filter chamber; 2. Filter cartridge; 21. Opening; 22. Ribs; 23. Filter plate; 3. First cavity; 4. Sealing member; 41. Sealing strip; 42. Elastic member; 5. Sealing ring plate; 6. Scraper; 61. Scraper; 62. Collecting trough; 63. Fixed frame; 64. Sliding rod; 65. Threaded rod; 7. Cleaning member; 71. Nozzle; 72. Accommodating chamber; 73. First pipe; 74. First flow channel; 75. Liquid outlet; 8. Second cavity; 9. Driving member; 91. Rotating shaft; 92. Driving motor; 93. Fixed shaft. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] For examples, see Figure 1 - Figure 6 , a coffee production wastewater treatment device includes a filter bin 1 and a filter cartridge 2. One end of the filter cartridge 2 has an opening 21. Wastewater is transported to the filter cartridge 2 from the opening 21. The filter cartridge 2 is rotatably installed in the filter bin 1, and its rotating connection is sealed. The filter bin 1 and the filter cartridge 2 form a first cavity 3. The first cavity 3 is connected to a negative pressure device for making the first cavity 3 in a negative pressure state. The central axis of the filter cartridge 2 is arranged at an angle to the horizontal plane. A sealing member 4 is installed in an annular array around the filter cartridge 2. A sealing ring plate 5 is provided on the upper side of the filter cartridge 2. When the filter cartridge 2 rotates, the sealing member 4 at the sealing ring plate 5 slides sealed with its inner wall. A scraper 6 and a cleaning member 7 are sequentially arranged along the rotation direction of the filter cartridge 2. The scraper 6 is located inside the filter cartridge 2, and the cleaning member 7 is installed on the inner side of the sealing ring plate 5.

[0021] like Figure 1 、 Figure 2 and Figure 3 As shown, during wastewater treatment, wastewater generated during coffee production is added from the opening 21 and filtered through the filter cartridge 2, wherein the negative pressure device provides a negative pressure environment for the first cavity 3, so that the liquid in the filter cartridge 2 is filtered under negative pressure, thereby improving the filtration efficiency. During the filtration process, the filter cartridge 2 rotates around its central axis, so that the side wall used for filtration in the filter cartridge 2 circulates below the liquid surface, avoiding long-term use of the same filtration area in the filter cartridge 2 for filtration, reducing the accumulation of objects that cannot pass through, such as pectin, which affects the filtration. Effect: During the rotation of the filter cartridge 2, pectin and other substances will be evenly distributed on the inner wall of the filter cartridge 2, and will be adsorbed on the side wall of the filter cartridge 2 under a certain negative pressure. In order to reduce or remove pectin and other substances attached to the inner wall of the filter cartridge 2, a scraper 6 is provided. The scraper 6 is provided at a corresponding position in the filter cartridge 2 to scrape the inner wall of the filter cartridge 2 above the liquid surface, so that during the filtration process, the filter cartridge 2 always maintains a certain degree of cleanliness of the inner wall, or reduces the accumulation thickness of pectin and other substances on the inner wall, thereby maintaining the filtration efficiency of the filter cartridge 2 to a certain extent. And because the first cavity 3 is in a negative pressure state, the pectin and other objects on the inner wall of the filter cartridge 2 generally have a certain adsorption force, and the pectin also has a certain viscosity, and the scraping member 6 cannot efficiently remove the objects on the inner wall of the filter cartridge 2 when scraping, and when considering solving this problem, generally, the distance between the scraping member 6 and the inner wall of the filter cartridge 2 is reduced, and the scraping member 6 is directly abutted or tightly abutted with the inner wall of the filter cartridge 2, so as to improve the efficiency of scraping, but this will cause the scraping member 6 and the inner wall of the filter cartridge 2 to be more severely worn, and the pectin and other substances will be forcedly squeezed into the filter hole, causing more serious blockage, in order to solve this problem, the sealing member 4 and the sealing ring plate 5 are arranged, the sealing member 4 forms a second cavity 8 separated from the first cavity 3 after entering the area of the sealing ring plate 5, and the area of the filter cartridge 2 corresponding to the second cavity 8 is basically not affected by the negative pressure of the first cavity 3, the adsorption force of the pectin and other substances in the corresponding area of the filter cartridge 2 is reduced, and the difficulty of scraping of the scraping member 6 is greatly reduced, so that the practicability and efficiency of filtering in the wastewater treatment process of the filter cartridge 2 in a rotating manner are considered.

[0022] It should be noted that the rotating connection between the filter cartridge 2 and the filter bin 1 can use a general rotary sealing member 4, so that the filter cartridge 2 maintains a certain sealing with the filter bin 1 during rotation, thereby stabilizing the negative pressure of the first cavity 3, and the rotary sealing member 4 can be adopted in the existing technology, and details are not described here, and the size of the first cavity 3 can be set as required by selecting the size of the filter bin 1 and the filter cartridge 2; In addition, the negative pressure device can also use a general negative pressure extraction device in the existing technology, which is also the existing technology, and details are not described here, and it is worth mentioning that the position of the air inlet should be arranged at a higher position of the filter bin 1 to avoid entering the filtered water.

[0023] In an embodiment of the present application, the filter cartridge 2 is connected to a driving member 9 for driving it to rotate around its own axis, as shown in Figure 2 The driving member 9 includes a rotating shaft 91 and a driving motor 92, one end of the rotating shaft 91 is fixedly connected with the bottom of the filter cartridge 2 and is coaxially arranged with the filter cartridge 2, the inner wall of the rotating shaft 91 is rotationally connected with a fixed shaft 93, the fixed shaft 93 is fixedly connected with one side of the filter bin 1, the other end of the fixed shaft 93 penetrates into and extends to the inside of the filter cartridge 2, one end of the rotating shaft 91 penetrates through the filter bin 1 and is rotationally connected with the inner wall of the filter bin 1, one end of the output shaft of the driving motor 92 is directly connected with the rotating shaft 91 through a transmission member, the rotating shaft 91 is driven to rotate by the driving motor 92 to drive the filter cartridge 2 to rotate, and the transmission member is a general transmission chain and sprocket mode.

[0024] In an embodiment of the present application, the scraping member 6 includes a scraper 61 and a collection groove 62, the scraper 61 is arranged in the axial direction of the filter cartridge 2, and the scraper 61 abuts or has a gap with the inner wall of the filter cartridge 2, the collection groove 62 is located below the scraper 61 and is used for collecting the objects scraped from the inner wall of the filter cartridge 2, and the collection groove 62 is mounted on the fixed shaft 93. As Figure 3 shown, the scraper 61 is arranged in a fixed manner at the corresponding position, in the embodiment, the scraper 61 is mounted on the fixed frame 63, and the gap between the scraper 61 and the inner wall of the filter cartridge 2 can be adjusted, the fixed frame 63 is mounted on the fixed shaft 93, specifically, the scraper 61 is fixedly provided with the sliding rod 64 at both ends, and the threaded rod 65 is rotatably connected to the middle part of the scraper 61, the sliding rod 64 is slidably connected to the inner wall of the fixed frame 63, and the threaded rod 65 is threadedly connected to the inner wall of the fixed frame 63, so that the gap between the scraper 61 and the inner wall of the filter cartridge 2 can be adjusted by rotating the threaded rod 65.

[0025] In an embodiment of the present application, although the scraping manner can remove most of the pectin and other substances, it still cannot effectively remove the part that blocks the filter holes, which will affect the efficiency of wastewater filtration, therefore, the cleaning member 7 can also be arranged, as Figure 4 shown, specifically, the cleaning member 7 includes a plurality of spray heads 71, the inner side of the sealing ring plate 5 is provided with a containing cavity 72 for containing each spray head 71, the spray head 71 is used for spraying fluid, and the fluid moves along the radial direction of the filter cartridge 2, for pushing the liquid on the inner wall of the filter cartridge 2 to the inner side, compared with the direct flushing manner of the spray head 71, the cooperation with the scraping member 6 can make the pectin attached to the inner wall of the filter cartridge 2 be scraped off a part first, reduce its thickness, and then form the backwashing effect by the action of the cleaning member 7, so as to flush out the pectin and other substances that block the filter holes, reduce the blockage, and improve the filtration efficiency.

[0026] In an embodiment of the present application, the fluid includes but is not limited to liquid, and the liquid can be clean water or filtered water, etc., compared with gas, the water can more smoothly take away the adhered pectin and other substances, and improve the cleaning effect, therefore, in the embodiment, the water spraying manner is preferably used for cleaning, and the spray head 71 is connected to an external water source and a pump body (not shown in the figure).

[0027] Since the seal 4 will inevitably block the position of the accommodating chamber 72 when passing through the nozzle 71 area, the water sprayed from the nozzle 71 will also be obstructed and partially gathered; in addition, when the second cavity 8 formed by the two seals 4 and the sealing ring plate 5 is in the area where the nozzle 71 is located, if the hole is blocked seriously, the sprayed water will also gather in the second cavity 8 to form a large pressure to assist in cleaning the filter holes, but the pressure increase will also affect the rotation of the filter cartridge 2. For this purpose, a first pipe 73 is provided. A first pipe 73 is provided on one side of the sealing ring plate 5. One end of the first pipe 73 is connected to the accommodating chamber 72, and the other end is connected to the scraper 61. The scraper 61 has a first flow The scraper 61 is provided with a plurality of liquid outlet holes 75 on the side opposite to the rotation direction of the filter cartridge 2. The liquid outlet holes 75 are connected to the first flow channel 74, which will allow part of the liquid to flow through the first pipe 73 to the scraper 61 to assist in scraping off the pectin and other substances to flow, thereby facilitating their movement to the collection tank 62 below. It should be noted that a suction device (not shown in the figure) can be provided at the collection tank 62 to extract the pectin and other substances from the mobile phone to avoid accumulation. In some other embodiments, the first flow channel 74 can also be directly connected to an external gas source or water source, and gas or water is transported into the first flow channel 74 to make it flow out from the liquid outlet holes 75.

[0028] In some other embodiments, if wastewater treatment is suspended, the cleaning operation during shutdown can also be directly performed in this way. The method is the same as described above and will not be described in detail here.

[0029] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, the filter cartridge 2 includes a base and ribs 22 mounted on the base and distributed in an annular array. Filter plates 23 are installed between adjacent ribs 22. The seal 4 is mounted on the ribs 22. The seal 4 includes a sealing strip 41 and an elastic component 42. The sealing strip 41 is slidably connected to the inner wall of the rib 22, and the elastic component 42 is disposed between the sealing strip 41 and the rib 22. The side of the sealing strip 41 close to the sealing ring plate 5 is made of wear-resistant material. It should be noted that the sealing requirements between the sealing strip 41 and the sealing ring plate 5 can also be lower. Generally, as long as the adsorption force between substances such as pectin and the inner wall of the filter cartridge 2 under negative pressure can be reduced, of course, in some embodiments, a method with better sealing performance is preferred. For example, the elastic force of the elastic component 42 can be appropriately increased under the allowable operating pressure of the sealing strip 41. If the elastic component 42 is a spring, a spring with greater elasticity can be replaced.

[0030] In one embodiment of the present invention, at least six ribs 22 are provided. Figure 4As shown, after the two adjacent ribs 22 have entered the sealing ring plate 5 area, the scraper 61 enters the filter plate 23 area between the two ribs 22. Similarly, the setting position of the nozzle 71 should meet the following requirements: before the first rib 22 of the two adjacent ribs 22 moves out of the sealing ring plate 5 area, the filter plate 23 between the two ribs 22 is cleaned. For details, see Figure 5 The corresponding position in .

[0031] During use, wastewater from coffee production is transported into the filter cartridge 2 through the opening 21; the negative pressure device is then activated to form a negative pressure in the first cavity 3, while the driving member 9 drives the filter cartridge 2 to rotate around its axis, and the wastewater is dynamically filtered under the negative pressure and centrifugal action; finally, synchronous scraping and backwashing are performed during the continuous rotation of the filter cartridge 2: when the sealing member 4 enters the sealing ring plate 5 area along with the filter cartridge 2, a closed second cavity 8 is formed, releasing the negative pressure adsorption force in this area; the scraping member 6 then scrapes the filter residue from the inner wall of the filter cartridge 2 into the collection tank 62; at the same time, the nozzle 71 of the cleaning member 7 radially sprays fluid to impact the filter plate 23, unblocking blocked filter holes; part of the fluid is diverted through the first pipe 73 to the liquid outlet 75 of the scraper 61 to assist in removing residual sticky substances.

[0032] In one embodiment of the present invention, the diameter of the filter cartridge 2 gradually increases from the opening 21 (not shown in the figure). This has the advantage of being able to accommodate more wastewater to be treated, and when different inclination angles are set, it can accommodate relatively more wastewater compared to the straight-cylinder filter cartridge 2. It also has the advantage of reducing the diameter at the opening 21, thereby reducing the size of the rotating seal 4 or other seals 4 required to be set between it and the filter bin 1, thereby making the technical implementation simpler (easy to ensure coaxiality and sealing surface flatness, and less affected by thermal deformation and vibration), more reliable (short sealing circumference reduces leakage risk, and uniform linear speed reduces local wear), and convenient maintenance (no large equipment is required for replacement, and downtime is short).

[0033] In one embodiment of the present invention, a method for treating coffee production wastewater is provided, which is applicable to the above-mentioned coffee production wastewater treatment device and specifically comprises the following steps: S1, transporting wastewater from coffee production into filter cartridge 2; S2, the filter cartridge 2 rotates and performs filtering under the negative pressure of the first cavity 3; S3, the scraper 6 scrapes the filter residue on the inner wall of the filter cartridge 2 and collects it. That is, when the filter cartridge rotates to the sealing ring plate area, the seal and the sealing ring plate form a closed cavity to release the negative pressure adsorption, and the scraper scrapes the filter residue on the inner wall of the filter cartridge and collects it; S4, the cleaning element 7 then radially sprays fluid toward the inner wall of the filter cartridge 2 to unblock the filter pores. Part of the fluid can also be directed to the scraper to assist in removing the filter residue. S5. The cleaned filter cartridge 2 is circulated for negative pressure filtration to continuously treat the wastewater.

[0034] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present invention.

Claims

1. A coffee production wastewater treatment device, characterized in that: The invention comprises a filter chamber (1) and a filter cartridge (2), wherein one end of the filter cartridge (2) has an opening (21), and wastewater is transported into the filter cartridge (2) from the opening (21), and the filter cartridge (2) is rotatably installed in the filter chamber (1), and its rotation connection is sealed, the filter chamber (1) and the filter cartridge (2) form a first cavity (3), and the first cavity (3) is connected to a negative pressure device for placing the first cavity (3) in a negative pressure state, the central axis of the filter cartridge (2) is arranged at an angle to the horizontal plane, and a sealing member (4) is installed in an annular array on the circumference of the filter cartridge (2), and a sealing ring plate (5) is provided on the upper side of the filter cartridge (2), and when the filter cartridge (2) rotates, the sealing member (4) at the sealing ring plate (5) slides with its inner wall in a sealing manner, and a scraper (6) and a cleaning member (7) are sequentially arranged along the rotation direction of the filter cartridge (2), the scraper (6) is located inside the filter cartridge (2), and the cleaning member (7) is installed on the inner side of the sealing ring plate (5).

2. The coffee production wastewater treatment device according to claim 1, characterized in that: The filter cartridge (2) is connected to a driving member (9) for driving the filter cartridge (2) to rotate around its own axis.

3. The coffee production wastewater treatment device according to claim 1, characterized in that: The scraper (6) comprises a scraper (61) and a collecting trough (62); the scraper (61) is arranged axially along the filter cartridge (2), and the scraper (61) abuts against or has a gap with the inner wall of the filter cartridge (2); the collecting trough (62) is located below the scraper (61) and is used to collect objects scraped from the inner wall of the filter cartridge (2).

4. The coffee production wastewater treatment device according to claim 1, characterized in that: The cleaning member (7) includes a plurality of nozzles (71), and a receiving cavity (72) for receiving each nozzle (71) is provided on the inner side of the sealing ring plate (5). The nozzles (71) are used to spray fluid, and the fluid moves along the radial direction of the filter cartridge (2) to push the liquid on the inner wall of the filter cartridge (2) toward the inner side thereof.

5. The coffee production wastewater treatment device according to claim 4, characterized in that: The fluid is liquid, and a first pipe (73) is provided on one side of the sealing ring plate (5). One end of the first pipe (73) is connected to the accommodating chamber (72), and the other end is connected to the scraper (61). A first flow channel (74) is provided in the scraper (61). A plurality of liquid outlet holes (75) are provided on the side of the scraper (61) opposite to the rotation direction of the filter cartridge (2), and the liquid outlet holes (75) are connected to the first flow channel (74).

6. The coffee production wastewater treatment device according to claim 1, characterized in that: The filter cartridge (2) comprises a base and ribs (22) mounted on the base and distributed in an annular array, filter plates (23) are mounted between adjacent ribs (22), and a seal (4) is mounted on the ribs (22).

7. The coffee production wastewater treatment device according to claim 6, characterized in that: The sealing member (4) comprises a sealing strip (41) and an elastic component (42), wherein the sealing strip (41) is slidably connected to the inner wall of the rib (22), and the elastic component (42) is arranged between the sealing strip (41) and the rib (22).

8. The coffee production wastewater treatment device according to claim 7, characterized in that: At least six ribs (22) are provided, and when two adjacent ribs (22) enter the sealing ring plate (5) area, the scraper (61) enters the filter plate (23) area between the two ribs (22).

9. The coffee production wastewater treatment device according to claim 8, characterized in that: The diameter of the filter cartridge (2) gradually increases from the opening (21).

10. A coffee production wastewater treatment method, applicable to the coffee production wastewater treatment device according to any one of claims 1 to 9, characterized in that: The specific steps include: S1, transporting wastewater from coffee production into the filter cartridge (2); S2, the filter cartridge (2) rotates and performs filtering under the negative pressure of the first cavity (3); S3, the scraper (6) scrapes the filter residue on the inner wall of the filter cartridge (2) and collects it; S4, the cleaning member (7) then radially sprays fluid toward the inner wall of the filter cartridge (2) to remove blockage in the filter pores; S5. The cleaned filter cartridge (2) is circulated for negative pressure filtration to continuously treat the wastewater.

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