Sewage treatment device for coffee beverage production
By introducing an automated impurity interception and collection structure into the wastewater treatment device for coffee beverage production, the problem of low impurity treatment efficiency in the existing technology has been solved, and the wastewater treatment efficiency has been improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-03-13
AI Technical Summary
In existing technologies, wastewater treatment devices in coffee beverage production processes lack automated impurity collection structures, leading to the need for manual impurity removal later on, which reduces wastewater treatment efficiency.
A wastewater treatment device for coffee beverage production was designed. By setting up a rotating outer cylinder and inner cylinder in the filter tank, the device uses components such as filter plates, counterweight scrapers and screw conveyors to automatically intercept, scrape and compress impurities, and achieve automated treatment by combining motor drive.
It achieves automated interception and collection of impurities, saving manpower and resources and improving the efficiency of sewage treatment.
Smart Images
Figure CN121648633A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a wastewater treatment device for coffee beverage production. Background Technology
[0002] Wastewater generated during coffee beverage production mainly comes from coffee bean washing, peeling, degumming, and soaking processes. It is characterized by high concentrations of organic matter, high color, and high suspended solids. In response to these characteristics, wastewater treatment requires a comprehensive process that includes pretreatment, biological treatment, advanced treatment, and disinfection before discharge.
[0003] The specific treatment process involves pretreatment, coagulation and sedimentation, pH adjustment, anaerobic digestion, aerobic oxidation, sand filtration and activated carbon adsorption, followed by ultraviolet disinfection or chlorination before discharge. Coagulation and sedimentation: Coagulants are added to coagulate suspended solids and colloids into larger particles, which are then removed through sedimentation. pH adjustment: Lime, alkaline solution, or recycled digester effluent is used to neutralize acidic wastewater, adjusting the pH to 6.5-7.5 to create a suitable environment for biological treatment. Anaerobic digestion: Processes such as rising anaerobic sludge blankets are used to decompose organic matter and produce biogas, removing 60%-80% of COD while reducing ammonia nitrogen. Aerobic oxidation: Through processes such as sequencing batch reactor (SBR) activated sludge, aerobic microorganisms further degrade organic matter, removing residual COD and BOD; Sand filtration and activated carbon adsorption: Residual suspended solids are removed through sand filtration, and color, odor, and some dissolved organic matter are adsorbed by activated carbon adsorption towers; Wastewater generated from washing coffee beans is dark in color and contains various suspended particles such as branches, leaves, peels, shells, and pectin. These impurities are difficult to degrade by microorganisms, increasing the difficulty of treatment. Therefore, the wastewater generated in this stage needs to be pretreated to remove large suspended particles and prevent shock loads.
[0004] Currently, existing technologies for pre-treating wastewater generated from coffee bean washing involve discharging the wastewater into a filter tank and installing a screen inside the tank. This screen intercepts and filters large particulate impurities and suspended solids in the wastewater as it flows through. However, there is a lack of a structure for automatically collecting these impurities, requiring subsequent collection and treatment, which can easily reduce the efficiency of wastewater treatment. Therefore, this technology does not meet current needs. To address this, we propose a wastewater treatment device for coffee beverage production. Summary of the Invention
[0005] This invention provides a wastewater treatment device for coffee beverage production. This wastewater treatment device can collect and process impurities while intercepting and filtering them, thereby improving the efficiency of wastewater treatment. It solves the problem mentioned in the background art that the existing screens lack an automated structure for collecting impurities, requiring subsequent collection and processing of impurities, which easily reduces the efficiency of wastewater treatment.
[0006] To achieve the above objectives, this disclosure provides a wastewater treatment device for coffee beverage production, including a filter tank and an outer cylinder rotatably disposed within the filter tank. A filter plate is installed on the outer side of the outer cylinder, and a counterweight scraper is slidably disposed on the outer side of the filter plate. An external slag inlet is provided on the side wall of the outer cylinder to cooperate with the filter plate. An inner cylinder is disposed inside the outer cylinder, and an internal slag inlet is provided on the side wall of the inner cylinder. The internal slag inlet intermittently overlaps with the external slag inlet. A slag guide hopper is installed inside the inner cylinder, and the upper end of the slag guide hopper communicates with the internal slag inlet. An inner shell is installed at the lower end of the slag guide hopper for collecting impurities.
[0007] Optionally, a toolbox is provided on the outside of the filter tank, an outer shaft is installed at the end of the outer cylinder, the middle part of the outer shaft is rotatably inserted into the side wall of the filter tank, the end of the outer shaft is located in the toolbox, a first gear is sleeved on the end of the outer shaft, a first motor is installed in the toolbox, a second gear is installed on the output shaft of the first motor, and the second gear meshes with the first gear.
[0008] Optionally, the filter sheet is configured as an arc-shaped sheet, the number of filter sheets is set to several, and the several filter sheets are evenly arranged circumferentially on the outer side of the outer cylinder. Slide grooves are provided on both sides of the filter sheet, and sliders that cooperate with the slide grooves are installed on both sides of the counterweight scraper. The sliders are slidably inserted into the slide grooves.
[0009] Optionally, a limiting block is slidably inserted into the side of the filter element. The limiting block is located in the groove and is configured as a wedge-shaped block. The limiting block is used in conjunction with the slider. The slider and the limiting block intermittently abut against each other. A spring is sleeved on the outside of the limiting block. One end of the spring is connected to the filter element, and the other end of the spring is connected to the limiting block.
[0010] Optionally, a slag collection tank is provided on the outside of the toolbox, an inner shaft is installed at the end of the inner cylinder, the middle part of the inner shaft is inserted into the inner side of the outer shaft, the end of the inner shaft is installed in the side wall of the slag collection tank, and the outer wall of the inner cylinder slides in fit with the inside of the outer cylinder.
[0011] Optionally, the number of external slag inlets is the same as the number of filter plates, and several external slag inlets are located on the sides of several filter plates respectively. The number of internal slag inlets is set to one, and the length of the internal slag inlet is the same as the length of the external slag inlet. The width of the internal slag inlet is greater than the width of the external slag inlet, and the plane where the internal slag inlet is located is higher than the horizontal plane where the top of the filter tank is located. The bottom of the filtration tank is provided with an arc groove that slides with the end of the filter element, so that when the filter element rotates together with the outer cylinder, the end of the filter element is always in sliding contact with the arc groove.
[0012] Optionally, the inner shell is connected to the lower end of the slag guide hopper, the inner shell is cylindrical, an auger is rotatably installed inside the inner shell, a second motor is installed inside the inner cylinder, and the output shaft of the second motor is connected to the auger.
[0013] Optionally, the inner shell end is connected to a conveying pipe, the conveying pipe penetrates the side wall of the inner cylinder, and the conveying pipe is inserted into the inner side of the inner shaft. The end of the conveying pipe is located in the slag collection tank, and a collection bag is provided in the slag collection tank. The bag opening of the collection bag is fitted onto the end of the conveying pipe.
[0014] Optionally, a connecting hopper is connected to the end of the inner shell, the connecting hopper is located inside the inner cylinder, and the discharge end of the connecting hopper is connected to the conveying pipe.
[0015] Optionally, a baffle is provided on the inner side of the connecting hopper, and the number of baffles is set to two. A shaft is installed on the outer side of each baffle. The shaft is rotatably inserted into the inner wall of the connecting hopper. A torsion spring is sleeved on the outer side of each shaft. One end of the torsion spring is connected to the inner wall of the conveying pipe, and the other end of the torsion spring is connected to the baffle.
[0016] Through the above technical solution, the wastewater treatment device for coffee beverage production provided in this disclosure, when in use: impurities in the wastewater are intercepted by the filter plates. The outer cylinder drives the filter plates to rotate upward, and the filter plates move the impurities on them upward. The filter plates move the impurities to the surface of the water. During the process of the outer and inner slag inlets coinciding, the counterweight scraper slides down along the filter plates, scraping the impurities on the filter plates into the inner shell. The auger rotates, conveying the impurities. Initially, the squeezing force of the impurities on the baffle plates is less than the rigidity of the torsion spring, causing the baffle plates to block the inner shell and compress the impurities in the inner shell. When the squeezing force of the impurities on the baffle plates is greater than the rigidity of the torsion spring, the torsion spring is compressed, the baffle plates flip, and the compressed impurities enter the collection bag through the connecting hopper and the conveying pipe. In summary, not only can the rotating filter plates intercept, filter, and retrieve impurities, saving manpower and resources, but the retrieved impurities can also be automatically compressed and collected, thereby improving the efficiency of wastewater treatment.
[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention.
[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention.
[0020] Figure 3 This is a cross-sectional structural diagram of the present invention.
[0021] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.
[0022] Figure 5 This is a schematic diagram of the structure of the filter element and the arc groove of the present invention.
[0023] Figure 6 This is a schematic diagram of the first-state cross-sectional structure of the counterweight scraper of the present invention.
[0024] Figure 7 This is a schematic diagram of the second state cross-sectional structure of the counterweight scraper of the present invention.
[0025] Figure 8 This is a schematic diagram of the inner cylinder structure of the present invention.
[0026] Figure 9 This is a schematic diagram of the baffle structure of the present invention.
[0027] Explanation of reference numerals in the attached drawings: 100, Filter tank; 110, Outer cylinder; 111, Toolbox; 112, Outer shaft; 113, First gear; 114, First motor; 115, Second gear; 120, Filter plate; 130, Counterweight scraper; 131, Slide groove; 132, Sliding block; 133, Limiting block; 134, Spring; 140, External slag inlet; 150, Inner cylinder; 151, Slag collection tank; 152, Inner shaft; 160, Internal slag inlet; 170, Slag guide hopper; 180, Inner shell; 181, Arc groove; 190, Screwdriver; 191, Second motor; 192, Conveying pipe; 193, Collection bag; 200, Connecting hopper; 210, Baffle plate; 211, Insert shaft; 212, Torsion spring. Detailed Implementation
[0028] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this disclosure. However, this disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below.
[0029] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements, which will not be repeated here.
[0030] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0031] According to some embodiments of this disclosure, a wastewater treatment apparatus for coffee beverage production is provided, referenced. Figure 1 — Figure 9As shown, the wastewater treatment device for coffee beverage production includes a filter tank 100 and an outer cylinder 110 rotatably disposed within the filter tank 100. Both ends of the outer cylinder 110 are rotatably engaged with the inner wall of the filter tank 100. A toolbox 111 is fixedly disposed on the outside of the filter tank 100. An outer shaft 112 is fixedly installed at the end of the outer cylinder 110. The middle part of the outer shaft 112 is rotatably inserted into the side wall of the filter tank 100 through a bearing. The end of the outer shaft 112 is located inside the toolbox 111, and a first gear 113 is interference-fitted onto the end of the outer shaft 112. A first motor 114 is fixedly installed inside the toolbox 111. A second gear 115 is fixedly installed on the output shaft of the first motor 114, and the second gear 115 is rotatably connected to the inner wall of the toolbox 111. The second gear 115 meshes with the first gear 113.
[0032] A filter disc 120 is fixedly installed on the outer side of the outer cylinder 110. A counterweight scraper 130 is slidably arranged on the outer side of the filter disc 120. The filter disc 120 is an arc-shaped disc, and there are several filter discs 120 arranged evenly around the outer side of the outer cylinder 110. A sliding groove 131 is opened on both sides of the filter disc 120. A slider 132 that cooperates with the sliding groove 131 is fixedly installed on both sides of the counterweight scraper 130. The slider 132 is slidably inserted into the sliding groove 131, and the slider 132 and the counterweight scraper 130 are slidably inserted into the sliding groove 131. The slide groove 131 slides and engages to prevent the counterweight scraper 130 from detaching from the filter sheet 120. A limit block 133 is slidably inserted into the side of the filter sheet 120. The limit block 133 is located in the slide groove 131 and is set as a wedge. The limit block 133 works in conjunction with the slider 132. The slider 132 and the limit block 133 intermittently abut against each other. A spring 134 is sleeved on the outside of the limit block 133. One end of the spring 134 is fixedly connected to the filter sheet 120, and the other end of the spring 134 is fixedly connected to the limit block 133.
[0033] The outer cylinder 110 has an external slag inlet 140 on its side wall for use with the filter plate 120. An inner cylinder 150 is provided inside the outer cylinder 110. A slag collection tank 151 is fixedly provided on the outside of the toolbox 111. An inner shaft 152 is fixedly installed at the end of the inner cylinder 150. The middle part of the inner shaft 152 is inserted into the inner side of the outer shaft 112, and there is a gap between the outer wall of the inner shaft 152 and the inner wall of the outer shaft 112. The end of the inner shaft 152 is fixedly installed in the side wall of the slag collection tank 151, so that the inner cylinder 150 is kept in a fixed state. The outer wall of the inner cylinder 150 slides with the inside of the outer cylinder 110. An internal slag inlet 160 is provided on the side wall of the inner cylinder 150.
[0034] The number of external slag inlets 140 is the same as the number of filter plates 120. Several external slag inlets 140 are located on the sides of several filter plates 120. The number of internal slag inlets 160 is set to one, and the length of the internal slag inlet 160 is the same as the length of the external slag inlet 140. The width of the internal slag inlet 160 is greater than the width of the external slag inlet 140. The plane where the internal slag inlet 160 is located is higher than the horizontal plane where the top of the filter tank 100 is located, thereby preventing the sewage in the filter tank 100 from entering the inner cylinder 150 through the internal slag inlet 160. The internal slag inlet 160 and the external slag inlet 140 overlap intermittently. When the external slag inlet 140 and the internal slag inlet 160 are staggered, the external slag inlet 140 is covered by the outer wall of the inner cylinder 150.
[0035] A slag guide hopper 170 is fixedly installed inside the inner cylinder 150. The upper end of the slag guide hopper 170 is connected to the inner slag inlet 160. An inner shell 180 is fixedly installed at the lower end of the slag guide hopper 170. The inner shell 180 is used to collect impurities. The bottom of the filter tank 100 is provided with an arc groove 181 that slides with the end of the filter plate 120. When the filter plate 120 rotates together with the outer cylinder 110, the end of the filter plate 120 is always in sliding contact with the arc groove 181, thereby preventing impurities from flowing through the gap between the filter plate 120 and the filter tank 100 with the water flow.
[0036] The inner shell 180 is connected to the lower end of the slag guide hopper 170. The inner shell 180 is cylindrical. An auger 190 is rotatably installed inside the inner shell 180. A second motor 191 is fixedly installed inside the inner cylinder 150. The output shaft of the second motor 191 is fixedly connected to the auger 190, thereby driving the auger 190 through the second motor 191. A conveying pipe 192 is connected to the end of the inner shell 180. The conveying pipe 192 penetrates the side wall of the inner cylinder 150 and is inserted into the inner side of the inner shaft 152. The end of the conveying pipe 192 is located in the slag collection tank 151. A collection bag 193 is provided in the slag collection tank 151. The bag opening of the collection bag 193 is fitted onto the end of the conveying pipe 192.
[0037] A connecting hopper 200 is fixedly connected to the end of the inner shell 180. The connecting hopper 200 is located inside the inner cylinder 150, and the discharge end of the connecting hopper 200 is connected to the conveying pipe 192. A baffle 210 is rotatably arranged inside the connecting hopper 200. There are two baffles 210, one above the other. A shaft 211 is fixedly installed on the outer side of each baffle 210. The shaft 211 is rotatably inserted into the inner wall of the connecting hopper 200. A torsion spring 212 is sleeved on the outer side of each shaft 211. One end of the torsion spring 212 is fixedly connected to the inner wall of the conveying pipe 192, and the other end of the torsion spring 212 is fixedly connected to the baffle 210.
[0038] Through the above technical solution, the wastewater treatment device for coffee beverage production provided in this disclosure, when in use, such as... Figure 1As shown, the sewage flows from right to left in the filter tank 100. Impurities in the sewage are intercepted by the filter plates 120. The first motor 114 drives the second gear 115 to rotate. Due to the meshing of the second gear 115 and the first gear 113, the first gear 113 drives the outer cylinder 110 to rotate through the outer shaft 112. This causes the outer cylinder 110 to drive the filter plates 120 on it to rotate. As the filter plates 120 rotate upward, the impurities on them gradually move upward, thus achieving the function of scooping up the impurities. Subsequently, the rotating filter plate 120 moves impurities to the water surface. As the filter plate 120 rotates and rises, the tilt angle of the scraper 130 at the end of the filter plate 120 gradually increases, causing the component of gravity acting on the counterweight scraper 130 along the direction of the filter plate 120 to become increasingly larger. When the outer slag inlet 140 and the inner slag inlet 160 begin to overlap, the component of gravity acting on the counterweight scraper 130 along the direction of the filter plate 120 exceeds the rigidity of the spring 134, causing the counterweight scraper 130 to slide down along the filter plate 120. The counterweight scraper 130 also moves the slider 132, causing the limiting block 133 to be subjected to sliding force. The block 132 is squeezed out of the chute 131, and the spring 135 is stretched. When the slider 132 completely passes the limit block 133, the limit block is reset under the action of the spring 134. Through the above steps, during the process of the outer slag inlet 140 and the inner slag inlet 160 coinciding, the counterweight scraper 130 slides from one side of the filter plate to the other side of the filter plate 120. Thus, as the counterweight scraper 130 slides down the filter plate 120, the impurities on the filter plate 120 can be scraped off. The scraped impurities enter the inner shell 180 in sequence through the outer slag inlet 140, the inner slag inlet 160 and the guide hopper 170. Not only that, such as Figure 3 and Figure 4 As shown, the second motor 181 drives the auger 190 to rotate, conveying the impurities in the inner shell 180 to the left. When the impurities in the inner shell 180 come into contact with the baffle 210, the squeezing force of the impurities on the baffle 210 is initially less than the rigidity of the torsion spring 212, so that the baffle 210 remains stationary and blocks the discharge end of the inner shell 180, thereby causing the impurities in the inner shell 180 to be gathered and compressed. Fine drainage holes can also be opened on the side wall of the inner shell 180 to facilitate the squeezing out of the wastewater absorbed by the impurities. Finally, as the impurities inside the inner shell 180 are further compressed, the squeezing force of the impurities on the baffle 210 increases. When the squeezing force exceeds the rigidity of the torsion spring 212, the torsion spring 212 is compressed, and the baffle 210 flips, releasing the blockage of the inner shell 180 by the baffle 210. This allows the compressed impurities to enter the conveying pipe 192 through the connecting hopper 200, and then enter the collection bag 193 through the conveying pipe 193. In summary, not only can the rotating filter 120 intercept, filter, and retrieve impurities, saving manpower and resources, but the retrieved impurities can also be automatically compressed and collected, thereby improving the efficiency of sewage treatment.
[0039] It should be noted that when the counterweight scraper 130 slides to the surface of the outer cylinder 110, as the outer cylinder 110 continues to rotate, the filter plate 120 passes the highest point of the outer cylinder 120 and begins to gradually rotate downward. During this process, the counterweight scraper 130 is subjected to an increasing gravitational force along the end direction of the filter plate 120, causing the counterweight scraper 130 to slide. The counterweight scraper 130 drives the slider 132 to pass the limit block 133 again, which allows the counterweight scraper 130 to move back to the end of the filter plate 120, thereby resetting the counterweight scraper 130.
[0040] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0041] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0042] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A wastewater treatment device for coffee beverage production, comprising a filter tank (100) and an outer cylinder (110) rotatably disposed within the filter tank (100), characterized in that: A filter plate (120) is installed on the outside of the outer cylinder (110). A counterweight scraper (130) is slidably arranged on the outside of the filter plate (120). An external slag inlet (140) is opened on the side wall of the outer cylinder (110) to cooperate with the filter plate (120). An inner cylinder (150) is arranged inside the outer cylinder (110). An internal slag inlet (160) is opened on the side wall of the inner cylinder (150). The internal slag inlet (160) and the external slag inlet (140) intermittently overlap. A slag guide hopper (170) is installed inside the inner cylinder (150). The upper end of the slag guide hopper (170) is connected to the internal slag inlet (160). An inner shell (180) is installed at the lower end of the slag guide hopper (170). The inner shell (180) is used to collect impurities.
2. The wastewater treatment device for coffee beverage production according to claim 1, characterized in that: A toolbox (111) is provided on the outside of the filter pool (100). An outer shaft (112) is installed at the end of the outer cylinder (110). The middle part of the outer shaft (112) is rotatably inserted into the side wall of the filter pool (100). The end of the outer shaft (112) is located inside the toolbox (111). A first gear (113) is sleeved on the end of the outer shaft (112). A first motor (114) is installed inside the toolbox (111). A second gear (115) is installed on the output shaft of the first motor (114). The second gear (115) meshes with the first gear (113).
3. The wastewater treatment device for coffee beverage production according to claim 1, characterized in that: The filter sheet (120) is configured as an arc-shaped sheet, and the number of filter sheets (120) is set to several, and the several filter sheets (120) are evenly arranged in the circumferential direction on the outside of the outer cylinder (110). The filter sheet (120) has a sliding groove (131) on both sides. The counterweight scraper (130) has a slider (132) on both sides that cooperates with the sliding groove (131). The slider (132) is slidably inserted into the sliding groove (131).
4. The wastewater treatment device for coffee beverage production according to claim 3, characterized in that: The filter (120) is slidably inserted into a limiting block (133) on its side. The limiting block (133) is located in the groove (131). The limiting block (133) is set as a wedge block. The limiting block (133) is used in conjunction with the slider (132). The slider (132) and the limiting block (133) intermittently abut against each other. A spring (134) is sleeved on the outside of the limiting block (133). One end of the spring (134) is connected to the filter (120), and the other end of the spring (134) is connected to the limiting block (133).
5. A wastewater treatment device for coffee beverage production according to claim 2, characterized in that: The toolbox (111) is provided with a slag collection pool (151) on the outside. An inner shaft (152) is installed at the end of the inner cylinder (150). The middle part of the inner shaft (152) is inserted into the inner side of the outer shaft (112). The end of the inner shaft (152) is installed in the side wall of the slag collection pool (151). The outer wall of the inner cylinder (150) is in sliding fit with the inside of the outer cylinder (110).
6. The wastewater treatment device for coffee beverage production according to claim 1, characterized in that: The number of external slag inlets (140) is the same as the number of filter plates (120). Several external slag inlets (140) are located on the sides of several filter plates (120). The number of internal slag inlets (160) is set to one, and the length of the internal slag inlet (160) is the same as the length of the external slag inlet (140). The width of the internal slag inlet (160) is greater than the width of the external slag inlet (140). The plane where the internal slag inlet (160) is located is higher than the horizontal plane where the top of the filter tank (100) is located. The bottom of the filter pool (100) is provided with an arc groove (181) that slides with the end of the filter plate (120). When the filter plate (120) rotates together with the outer cylinder (110), the end of the filter plate (120) is always in sliding contact with the arc groove (181).
7. A wastewater treatment device for coffee beverage production according to claim 5, characterized in that: The inner shell (180) is connected to the lower end of the slag guide hopper (170). The inner shell (180) is cylindrical. An auger (190) is rotatably installed inside the inner shell (180). A second motor (191) is installed inside the inner cylinder (150). The output shaft of the second motor (191) is connected to the auger (190).
8. A wastewater treatment device for coffee beverage production according to claim 7, characterized in that: The inner shell (180) is connected to a conveying pipe (192) at its end. The conveying pipe (192) penetrates the side wall of the inner cylinder (150) and is inserted into the inner side of the inner shaft (152). The end of the conveying pipe (192) is located in the slag collection tank (151). A collection bag (193) is provided in the slag collection tank (151), and the opening of the collection bag (193) is fitted onto the end of the conveying pipe (192).
9. A wastewater treatment device for coffee beverage production according to claim 8, characterized in that: The inner shell (180) is connected to a connecting hopper (200) at one end. The connecting hopper (200) is located inside the inner cylinder (150), and the discharge end of the connecting hopper (200) is connected to the conveying pipe (192).
10. A wastewater treatment device for coffee beverage production according to claim 9, characterized in that: The inner side of the connecting bucket (200) is provided with a baffle (210), and the number of the baffle (210) is set to two. The outer side of the baffle (210) is equipped with a shaft (211). The shaft (211) is rotatably inserted into the inner wall of the connecting bucket (200). The outer side of the shaft (211) is fitted with a torsion spring (212). One end of the torsion spring (212) is connected to the inner wall of the conveying pipe (192), and the other end of the torsion spring (212) is connected to the baffle (210).