An anaerobic treatment device and process for fruit juice processing wastewater

Abstract

This invention relates to the field of wastewater treatment, and particularly to an anaerobic treatment device and process for fruit juice processing wastewater. The device includes an upper frame and a lower frame, with a screening assembly installed between them. Barrier units are located on both sides of the lower frame to separate suspended solids from the wastewater. A water supply frame is located at the upper end of the upper frame, and a water collection tank extends through the lower side of the lower frame. The screening assembly effectively and quickly intercepts large impurities, such as fruit residue, in the wastewater as it enters the device. By blocking these large impurities in a specific area, the device prevents them from entering subsequent treatment processes, avoiding problems such as pipe blockage and equipment wear. This provides better influent conditions for subsequent sedimentation and anaerobic treatment stages, effectively improving the efficiency and quality of preliminary wastewater treatment and reducing overall treatment costs.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to an anaerobic treatment device and process for fruit juice processing wastewater. Background Technology

[0002] In the juice processing industry, wastewater treatment is crucial for sustainable development. Current anaerobic treatment technologies first introduce wastewater into a treatment tank, where a screen intercepts large impurities such as fruit residue. Suspended solids, such as fruit pulp fibers, are then removed through sedimentation or filtration. After pretreatment, the wastewater passes through an anaerobic baffled reactor, where it is guided by baffles through multiple reaction chambers to degrade organic matter.

[0003] However, this technology has significant drawbacks. The amount of impurities in the wastewater is unstable, and if staff fail to clean the screens in a timely manner, the screens are easily clogged. During sedimentation, it is impossible to completely separate the sediment from the water, and suspended solids easily mix into the water when it is poured out, resulting in poor sedimentation. In addition, anaerobic treatment requires the addition of chemical agents in multiple reaction chambers, which is cumbersome and costly.

[0004] For a more accurate comparison, patent CN118702356A discloses a wastewater treatment process for fruit juice processing. This process uses screening equipment to sieve and settle the wastewater, removing solid impurities and suspended solids. Mechanical components such as filter plates and scrapers are used to clean the residue. The wastewater then undergoes pH adjustment, biological treatment, advanced treatment, and disinfection. However, this device has significant drawbacks. Its wastewater treatment efficiency is low. During the screening and sedimentation stage, the scraper cleaning of residue and the top block cleaning of filter blockages are cumbersome and slow, making it difficult to meet the needs of high-efficiency treatment of large-scale fruit juice processing wastewater. Furthermore, the continuous inflow of wastewater during the cleaning process affects the stability of the filtration effect, making it difficult to improve the overall treatment efficiency.

[0005] The existing equipment is not equipped with a dosing device, meaning it cannot quickly add chemical agents used in anaerobic treatment to the wastewater. It can only treat wastewater through conventional methods, which limits its applicability. When encountering situations where sedimentation alone cannot remove suspended solids, the inability to add flocculants or other agents makes it difficult to cause fine suspended solids to coagulate into large particles, resulting in incomplete removal of suspended solids and failure of the effluent quality to meet standards.

[0006] Based on the above-stated viewpoints, the present invention aims to design a wastewater treatment device that facilitates screen cleaning, completely separates wastewater and sediment, and allows anaerobic reactions to occur in a single chamber during the process. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides an anaerobic treatment device for fruit juice processing wastewater, comprising an upper frame and a lower frame. A screen assembly is installed between the upper and lower frames, and barrier units are provided on both sides of the lower frame to separate suspended sediments from the wastewater. A water supply frame is provided at the upper end of the upper frame, and a water collection tank is provided through the lower side of the lower frame.

[0008] The barrier unit includes rectangular frames on both sides of the lower frame, a rotating cylinder inside the rectangular frame, a strip groove on one side of the rectangular frame, a winding assembly on the bottom wall of the lower frame, a sealing cloth wound together between the winding assembly and the rotating cylinder, and a sedimentation tank on the sealing cloth.

[0009] Preferably, the winding assembly includes a conical block disposed on the bottom wall of the lower frame, with symmetrical circular grooves opened inside the conical block. The outer sides of the circular grooves are respectively connected to the water collection tank inside the lower frame. A winding shaft located in the circular groove is rotatably inserted into the conical block by a torsion spring.

[0010] Preferably, one end of the sealing cloth is connected to the winding shaft on the corresponding side through the opening of the circular groove, and the thickness of the sealing cloth gradually decreases in the direction toward the winding shaft.

[0011] Preferably, one side of the sealing cloth extends into the rotating drum, and a water inlet groove is provided inside the sealing cloth on one side of the rotating drum.

[0012] Preferably, the sedimentation tank has several through grooves on the side facing the rotating drum that are connected to the water inlet groove, and a one-way valve is installed in the through groove.

[0013] Preferably, the screening assembly includes limiting frames symmetrically arranged on both sides of the upper and lower frames. A swing shaft is rotatably inserted inside the limiting frame, and a support plate is sleeved on the outside of the swing shaft. Screen plates are rotatably arranged on both sides of the support plate by torsion springs, and the screen plate on one side of the two support plates is located in the gap between the upper and lower frames.

[0014] Preferably, the two support plates are at different heights, and screen grooves are provided on the upper and lower corresponding screen plates. The diameter of the screen grooves on the corresponding screen plates on the two support plates decreases from high to low.

[0015] Preferably, the bottom wall of the lower frame is symmetrically provided with sliding grooves corresponding to the sedimentation tank, and a settling plate slides in the sliding groove, with one side of the settling plate being inclined.

[0016] Preferably, the water collection tank is symmetrically equipped with push cylinders via cylinder seats, and the extension and retraction ends of the push cylinders are connected to the settling plate.

[0017] In addition, the present invention also provides an anaerobic treatment process for fruit juice processing wastewater, comprising the following steps:

[0018] S1, wastewater primary screening: The water supply frame is connected to the external water supply equipment to discharge wastewater into the upper and lower frames, and large impurities in the wastewater are screened out by the screening components during the process of the wastewater falling.

[0019] S2, Wastewater Sedimentation: After initial screening, the wastewater will fall to the bottom of the lower frame. It will then be left to stand for a period of time, allowing the suspended solids in the wastewater to settle to the bottom of the lower frame through the sedimentation tank. After that, the wastewater in the lower frame will undergo anaerobic treatment.

[0020] S3, Solid-liquid separation: After the suspended solids settle to the bottom, the rotating drum drives the sealing cloth to roll around its outside. At this time, the sedimentation tank is also rolled around the outside of the corresponding rotating drum, and the sealing cloth separates the sewage and sediment.

[0021] S4, Sewage discharge: Sewage is discharged into the collection tank through the winding assembly.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] I. This invention, through a screening component, can quickly and effectively intercept large impurities in wastewater, such as fruit residue, when the wastewater enters the device. By blocking these large impurities in a specific area, it prevents them from entering subsequent treatment processes, avoiding problems such as pipe blockage and equipment wear. This provides better influent conditions for subsequent sedimentation, anaerobic, and other treatment stages, effectively improving the efficiency and quality of preliminary wastewater treatment and reducing overall treatment costs.

[0024] Second, this invention creates favorable conditions for the flocculant, bacteria, and wastewater to fully react through the winding component and the barrier unit. On the one hand, it achieves efficient sedimentation and solid-liquid separation of suspended solids in wastewater, separating the sedimented suspended solids and impurities generated by anaerobic treatment from the upper wastewater. On the other hand, it allows the flocculant and bacteria to work from the bottom of the wastewater, fully contacting impurities and organic matter in the wastewater, accelerating the sedimentation process, promoting anaerobic metabolism, and greatly improving the efficiency of pretreatment and anaerobic reaction. At the same time, in conjunction with the sealing component in the water supply frame, the wastewater inflow can be flexibly adjusted, allowing the water flow to evenly impact the screen plate, ensuring stable filtration effect and ensuring continuous and stable operation of the equipment.

[0025] Third, this invention drives the swing shaft to rotate via a drive unit, enabling rapid switching of the sieve plate, timely cleaning of impurities on the sieve plate, and ensuring continuous and efficient screening. It can also control the rotation of the valve body to flexibly adjust the influent flow of wastewater. At the same time, it drives the rotating drum to pull the sealing cloth, achieving effective separation of wastewater and sediment. Driven by the drive unit, each step in the processing flow of this application works closely together and smoothly, greatly improving the treatment efficiency of juice processing wastewater. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0028] Figure 2 This is a cross-sectional structural diagram of the main body of the present invention.

[0029] Figure 3 This is a schematic diagram of the barrier unit and winding assembly of the present invention.

[0030] Figure 4 This is a cross-sectional view of the barrier unit and winding assembly of the present invention.

[0031] Figure 5 This is the present invention. Figure 4 Enlarged view of part of the structure at point A in the middle.

[0032] Figure 6 This is the present invention. Figure 4 Enlarged view of part of the structure at point B.

[0033] Figure 7 This is a planar schematic diagram of the sealing cloth of the present invention no longer being wound on the winding shaft.

[0034] Figure 8 This is a schematic diagram of the connecting cylinder of the present invention.

[0035] Figure 9 This is a schematic diagram of the structure of the screening component of the present invention.

[0036] Figure 10 This is the present invention. Figure 9 Enlarged view of part of the structure at point C.

[0037] Figure 11 This is a schematic diagram of the settlement plate of the present invention.

[0038] Figure 12 This is a schematic diagram of the sealing component of the present invention.

[0039] Figure 13 This is a schematic diagram of the main framework of the present invention.

[0040] Figure 14 This is a cross-sectional schematic diagram of the blowing unit of the present invention.

[0041] Figure 15 This is a cross-sectional schematic diagram of the blowing unit of the present invention from another angle.

[0042] Figure 16 This is a schematic diagram of the structure of the driving unit of the present invention.

[0043] Figure 17 This is the present invention. Figure 16 Enlarged view of part of the structure at point D.

[0044] In the diagram, 1. Upper frame; 10. Lower frame; 11. Water supply frame; 12. Water collection tank; 2. Barrier unit; 20. Rectangular frame; 21. Rotating drum; 22. Strip trough; 23. Sealing cloth; 24. Sedimentation tank; 3. Winding assembly; 30. Conical block; 31. Circular trough; 32. Winding shaft; 33. Water inlet trough; 34. One-way valve; 35. Connecting cylinder; 4. Screening assembly; 40. Limiting frame; 41. Swing shaft; 42. Support plate; 43. Screen plate; 44. Screen trough; 5. Settling plate; 50. Pushing element. 6. Cylinder; 7. Sealing assembly; 8. Rectangular block; 9. L-shaped groove; 10. Valve body; 11. External connecting hole; 2. Diverter plate; 3. Blowing unit; 4. Main frame; 5. Support plate; 6. Spring shaft; 76. Mounting groove; 87. Guide plate; 88. Partition plate; 9. Drive unit; 10. Drive cylinder; 11. Transmission gear ring; 12. Large gear ring; 13. Drive motor; 14. Drive gear; 15. Reversing gear set; 16. Driven gear; 17. Bending plate; 18. Drive rack. Detailed Implementation

[0045] The following combination Figures 1 to 17 The embodiments of the present invention will be described in detail below.

[0046] The anaerobic treatment device and process for fruit juice processing wastewater disclosed in this application are applied to the treatment of fruit juice processing wastewater. They can efficiently separate large impurities and suspended solids in wastewater to achieve solid-liquid separation. After the wastewater enters the equipment, large impurities are first intercepted, and then the suspended solids are precipitated and anaerobicly treated to isolate the precipitated impurities from the upper wastewater. The device promotes the full reaction of flocculants, bacteria and wastewater, optimizes the water inlet method to prevent impact on the filter components, and can also remove equipment residue during operation to ensure the efficiency of wastewater treatment.

[0047] Example 1: Refer to Figure 1 and Figure 2 As shown, it includes an upper frame 1, a lower frame 10, a screen assembly 4, a barrier unit 2, a water supply frame 11, and a water collection tank 12. The screen assembly 4 is installed between the upper frame 1 and the lower frame 10, and the barrier units 2 are provided on both sides of the lower frame 10 to separate suspended sediments in the sewage. The water supply frame 11 is provided at the upper end of the upper frame 1, and the water collection tank 12 passes through the lower side of the lower frame 10.

[0048] The water supply frame 11 is used to connect to an external water supply device, which discharges sewage into the water supply pipe. The sewage then enters the upper frame 1 and then the sewage in the upper frame 1 enters the screening component 4. The screening component 4 separates large impurities such as fruit residue from the sewage. The large impurities remain on the screening component 4. The screened sewage then enters the lower frame 10 through the screening component 4. The sewage then undergoes sedimentation and anaerobic treatment in the lower frame 10. The barrier unit 2 is used to isolate the suspended solids and impurities generated by anaerobic treatment from the upper sewage. The isolated sewage then enters the collection tank 12, while the sedimented floating solids and impurities remain in the lower frame 10.

[0049] Reference Figure 3 , Figure 4 and Figure 5 As shown, this is the barrier unit 2 used to isolate sewage and sediment. Specifically, the barrier unit 2 includes a rectangular frame 20, a rotating cylinder 21, a strip groove 22, a winding assembly 3, a sealing cloth 23, and a sedimentation tank 24. The rectangular frame 20 is set on both sides of the lower frame 10. The rotating cylinder 21 rotates inside the rectangular frame 20. A strip groove 22 is opened on one side of the rectangular frame 20. A winding assembly 3 is set on the bottom wall of the lower frame 10. The sealing cloth 23 is wound together between the winding assembly 3 and the rotating cylinder 21. A sedimentation tank 24 is opened on the sealing cloth 23. The rotating cylinder 21 can rotate inside the rectangular frame 20. One side of the sealing cloth 23 is wound on the winding assembly 3, and the other side passes through the strip groove 22 and is wound on the rotating cylinder 21, and is in communication with the inside of the rotating cylinder 21. That is, when the rotating cylinder 21 is driven to rotate by an external force, it can drive the sealing cloth 23 on the winding assembly 3 to be wound on its outside.

[0050] In the initial state, after the sewage enters the lower frame 10, it settles for a period of time. The fine fruit juice residue and small particulate suspended matter in the sewage will settle. The sediment will fall to the bottom of the lower frame 10 through the sedimentation tank 24 of the sealing cloth 23. When the suspended matter and residue in the sewage have settled, the sealing cloth 23 is driven by the rotating drum 21 to roll around its outer wall. That is, the sedimentation tank 24 will also roll around its outer wall. At this time, the remaining sealing cloth 23 will separate the sewage and sediment. Although the separated sediment still contains some sewage, in the large-scale sewage treatment, the proportion of this residual sewage is low.

[0051] The sediment will then undergo a series of external treatment processes, such as dehydration and drying, and the wastewater in the sediment will be dried. The wastewater remaining in the sediment is negligible and will not have a substantial impact on the performance and effectiveness of the entire wastewater treatment system. The sealing of the sealing cloth 23 ensures that most of the wastewater in the lower frame 10 has a sedimentation effect when discharged, effectively ensuring the efficient and stable operation of the wastewater treatment work.

[0052] It should be noted that the "impurities" mentioned in the above implementation process refer to large pieces of fruit pulp and other impurities in the wastewater, while the "sediment" refers to suspended solids that are separated from the wastewater after sedimentation or suspended solids that appear after microbial treatment.

[0053] Continue to refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, this is the winding assembly 3 used for winding the sealing cloth 23; specifically, the winding assembly 3 includes a conical block 30, a circular groove 31, a winding shaft 32, a water inlet groove 33, a one-way valve 34, and a connecting cylinder 35. The conical block 30 is disposed on the inner bottom wall of the lower frame 10. A Q-shaped circular groove 31 is symmetrically formed inside the conical block 30. The outer sides of the circular groove 31 communicate with the water collection tank 12 inside the lower frame 10. The winding shaft 32, located within the circular groove 31, is rotatably inserted into the conical block 30 via a torsion spring. 2. When driven by an external force, it can rotate within the circular groove 31. After the external force disappears, the reaction force of the torsion spring drives the winding shaft 32 to rotate back to the initial position. That is, after the rotating drum 21 pulls the sealing cloth 23 to wind around its outer wall, the winding shaft 32 can rotate synchronously. When the rotating drum 21 stops pulling, the torsion spring at the end of the winding shaft 32 will pull the rotating drum 21 to rotate in the opposite direction through the sealing cloth 23, and the sealing cloth 23 will synchronously wind back to the outside of the winding shaft 32, and the sedimentation tank 24 will return to the initial position.

[0054] One end of the sealing cloth 23 is connected to the winding shaft 32 on the corresponding side through the opening of the circular groove 31, and the thickness of the sealing cloth 23 gradually decreases in the direction towards the winding shaft 32. After the sealing cloth 23 is wound onto the outside of the rotating drum 21, that is, at this time the sediment and sewage are blocked by the sealing cloth 23. In the initial state, the sealing cloth 23 is used to block the circular groove 31 and the opening extending from the upper end of the circular groove 31 to the outside of the conical block 30, so that sewage will not flow into the collection tank 12 through the circular groove 31. When most of the extension of the sealing cloth 23 is wound onto the outside of the rotating drum 21, the remaining width of the sealing cloth 23 is no longer close to the upper extension of the circular groove 31, that is, the sewage will enter the circular groove 31 through the upper extension of the circular groove 31, and then be discharged into the collection tank 12 from the lower extension of the circular groove 31. At this time, the sewage in the lower frame 10 will be separated.

[0055] One side of the sealing cloth 23 extends into the rotating drum 21, and an inlet groove 33 is provided inside the sealing cloth 23 on one side of the rotating drum 21. Several through grooves communicating with the inlet groove 33 are provided on the side of the sedimentation tank 24 facing the rotating drum 21, and a one-way valve 34 is installed in each through groove. One end of the rotating drum 21 rotates through the corresponding outer wall of the lower frame 10, and a connecting cylinder 35 is rotatably installed on one side of the outer wall of the lower frame 10. The connecting cylinder 35 is used to connect to an external pipe, essentially serving as an external installation interface. After being connected to the connecting cylinder 35, the connecting cylinder 35 can be limited. When the rotating cylinder 21 rotates, the connecting cylinder 35 is limited by the external pipe and will not rotate, so that the external pipe can add liquid flocculants such as polyaluminum chloride solution into the rotating cylinder 21. Polyaluminum chloride hydrolyzes in water to produce aluminum hydroxide colloid, which can quickly neutralize the surface charge of suspended particles in sewage. Through the compression of the double electric layer and the adsorption bridging effect, the small particles are agglomerated into large flocs, accelerating the sedimentation process and improving the pretreatment effect of sewage.

[0056] During anaerobic reactions, a mixed bacterial solution containing methanogenic bacteria and hydrolytic acidifying bacteria can be added through this pipe. The hydrolytic acidifying bacteria can decompose large organic molecules in wastewater, such as pectin and cellulose commonly found in fruit juice wastewater, into smaller organic molecules such as organic acids and alcohols, thereby improving the biodegradability of the wastewater. The methanogenic bacteria can further convert the intermediate products produced by hydrolysis and acidification into methane and carbon dioxide, achieving deep degradation of organic matter in wastewater.

[0057] The added flocculants and microorganisms enter the inlet tank 33, and then these substances in the inlet tank 33 are discharged into the lower frame 10 through the one-way valve 34. Since the one-way valve 34 is located at the bottom of the sewage, the flocculants and microorganisms extend upward with the water flow, allowing them to come into more thorough contact with the sewage and react more fully. The flocculants begin to work from the bottom, causing suspended particles in the sewage to quickly coagulate and settle from the bottom. The microorganisms are abundant at the bottom, using the rich organic matter in the sewage as a nutrient source, and carry out anaerobic metabolic activities from bottom to top, promoting the efficient progress of the entire anaerobic reaction, and further improving the treatment efficiency and quality of the sewage.

[0058] The flocculants and mixed bacterial solutions mentioned above are all common knowledge. Those skilled in the art can add different agents into the sewage through the one-way valve 34 according to the actual application scenario.

[0059] Reference Figure 9 and Figure 10 As shown, the screening assembly 4 is used to separate large particles from sewage. Specifically, the screening assembly 4 includes a limiting frame 40, a swing shaft 41, a support plate 42, a screen plate 43, and a screen groove 44. The two limiting frames 40 are symmetrically arranged on both sides of the upper frame 1 and the lower frame 10. The swing shaft 41 is rotatably inserted inside the limiting frame 40, that is, the swing shaft 41 can rotate between the corresponding limiting frames 40. The two sets of limiting frames 40 and the swing shaft 41 can also support the upper frame 1 and the lower frame 10.

[0060] A support plate 42 is sleeved on the outside of the swing shaft 41. Screen plates 43 are rotatably mounted on both sides of the support plate 42 via torsion springs. The two support plates 42 are at different heights. Screen grooves 44 are provided on the upper and lower corresponding screen plates 43. The diameter of the screen grooves 44 on the two support plates 42 decreases from high to low. The screen plates 43 on one side of the two support plates 42 are located in the gap between the upper frame 1 and the lower frame 10. The swing shaft 41 can drive the two corresponding screen plates 43 to rotate along its axis through the support plate 42. When the sewage falls onto the upper screen plate 43, large impurities in the sewage will be blocked by the screen grooves 44 on the screen plate 43. Then the sewage will be discharged into the lower frame 10 through the screen grooves 44.

[0061] Furthermore, the design of two layers of screen plates 43, and the fact that the diameter of the screen grooves 44 on the screen plates 43 is gradually reduced, can improve the screening efficiency of large impurities in the sewage. The two screen plates 43 are located in the gap between the upper frame 1 and the lower frame 10, and the corresponding upper and lower screen plates 43 can block the gap between the upper frame 1 and the lower frame 10, preventing sewage from flowing out of the upper frame 1 and the lower frame 10 through the gap.

[0062] As impurities accumulate on the two screen plates 43 between the upper frame 1 and the lower frame 10, the swing shaft 41 is driven to rotate 180 degrees, causing the two screen plates 43 to rotate out of the space between the upper frame 1 and the lower frame 10. Meanwhile, the clean screen plate 43 on the other side of the support plate 42 moves to the space between the upper frame 1 and the lower frame 10 to continue the screening process. The other screen plate 43 is driven by an external force to flip over, cleaning the impurities on its end face. Then, no longer under external force, it swings through its corresponding torsion spring to align with the support plate 42, preparing to repeat the above steps, thereby achieving the replacement of the screen plates 43. During the replacement process, the water supply frame 11 can stop supplying water for a short time. Once the clean screen plate 43 moves to the space between the upper frame 1 and the lower frame 10, water can be supplied immediately again to ensure the efficiency of sewage treatment.

[0063] Reference Figure 11 As shown, in order to clean out the sediment at the bottom of the lower frame 10, sliding grooves corresponding to the sedimentation tank 24 are symmetrically opened on the inner bottom wall of the lower frame 10. A settling plate 5 slides in the sliding groove, that is, the sediment will settle onto the settling plate 5 through the sedimentation tank 24. One side of the settling plate 5 is inclined. A push cylinder 50 is symmetrically arranged on the water collection tank 12 through a cylinder seat, and the extension end of the push cylinder 50 is connected to the settling plate 5.

[0064] Once sedimentation is complete, the wastewater and sediment are separated by the sealing cloth 23. The settling plate 5 can then be lowered by pushing the cylinder 50, and the sediment will flow out of the settling plate 5 through the inclined surface on the settling plate 5. This also makes it easier for staff to clean the impurities on the settling plate 5.

[0065] In the specific implementation process, after the sewage of one stage has completed the separation of sediment and discharged into the lower frame 10, it is not necessary to immediately drive the settling plate 5 to descend by pushing the cylinder 50. Instead, the sewage of the next stage is discharged into the lower frame 10, and then the sewage is subjected to sedimentation and anaerobic treatment again. After that, the sealing cloth 23 is activated to separate the sewage and sediment. At this time, the sediment on the settling plate 5 will accumulate more and more. When there is enough sediment, the settling plate 5 can drive the sediment to descend, which can effectively reduce the amount of sewage in the sediment.

[0066] During anaerobic reactions, it is crucial to ensure that the wastewater within the lower frame 10 is completely isolated from the outside air and oxygen. This is because anaerobic microorganisms rely on an anaerobic environment for metabolism, and the presence of oxygen will have a serious impact on them. On the one hand, oxygen will inhibit the activity of anaerobic microorganisms, change their metabolic pathways, and prevent them from properly decomposing organic matter in the wastewater, thus reducing the efficiency of the anaerobic reaction. On the other hand, oxygen may react with intermediate products generated during the reaction, hindering the smooth progress of the reaction and even producing byproducts that are detrimental to subsequent treatment.

[0067] To achieve a strictly anaerobic environment, the water supply frame 11 is first shut off to prevent outside air from entering with the water flow. At the same time, the circular trough 31 is tightly sealed by the sealing cloth 23 to prevent air from seeping in from this part. In addition, the sieve plate 43 inside the upper frame 1 and the lower frame 10 also plays a key role. Its edges can seal the area between the upper frame 1 and the lower frame 10 tightly. With multiple measures working together, a good sealing effect is achieved inside the lower frame 10, creating a stable anaerobic environment for anaerobic microorganisms, ensuring that the anaerobic reaction is not disturbed by oxygen and proceeds smoothly and efficiently.

[0068] Example 2: Refer to Figure 12 As shown, based on Embodiment 1, in order to enable real-time adjustment of the sewage inflow, a blocking component 6 for blocking the water is provided in the water supply frame 11. Specifically, the blocking component 6 includes a rectangular block 60, an L-shaped groove 61, a valve body 62, an external connecting hole 63, and a diverter plate 64. The rectangular block 60 is located at the upper end of the water supply frame 11. An L-shaped groove 61 is provided in the rectangular block 60. A valve body 62 is located in the L-shaped groove 61 within the rectangular block 60. The rotating end of the valve body 62 passes through the top of the rectangular block 60. An external connecting hole 63 communicating with the L-shaped groove 61 is provided on one side of the rectangular block 60. The lower side of the L-shaped groove 61 communicates with the upper end port of the water supply frame 11. Several diverter plates 64 distributed along their extensions are provided at the lower opening of the water supply frame 11.

[0069] That is, the valve body 62 is used to block the L-shaped groove 61. By driving the rotating end at the upper end of the valve body 62 to rotate, the blocking end of the valve body 62 can be driven to stop blocking the L-shaped groove 61, so that the external water supply equipment can discharge sewage into the L-shaped groove 61 through the external connecting hole 63. The sewage in the L-shaped groove 61 can then enter the water supply frame 11. After the water flows down to the bottom of the water supply frame 11, it will collide with the diversion plate 64, so that the water flow is dispersed and evenly contacts the lower screen plate 43, avoiding the sewage from concentrating and impacting a part of the screen plate 43, causing the screen groove 44 in that area to be blocked by impurities in advance, thereby affecting the filtration efficiency.

[0070] Example 3: Refer to Figure 13 , Figure 14 and Figure 15As shown, based on Embodiment 1 and Embodiment 2, a main frame 70 is provided, and the upper frame 1 and lower frame 10 are located inside the main frame 70. The main frame 70 is provided with a blowing unit 7 for cleaning the residue on the screen plate 43 and the settling plate 5. Specifically, the blowing unit 7 includes the main frame 70, support plate 71, spring shaft 72, mounting groove 73, guide plate 74 and partition plate 75. The two support plates 71 are staggered on the inner wall of the main frame 70. The support plate 71 is provided with a spring shaft 72, and the extension end of the spring shaft 72 contacts the side of the screen plate 43 located outside the upper frame 1 and lower frame 10. The corresponding screen plate 43 is inclined to a certain extent along the axis of its swing axis 41 because it is abutted by the extension end of the spring shaft 72.

[0071] That is, when the sieve plate 43 moves to correspond with the spring shaft 72, one side of the sieve plate 43 will contact the telescopic end of the corresponding spring shaft 72. At this time, the spring shaft 72 drives the sieve plate 43 to rotate along the rotation point, which causes the sieve plate 43 to tilt to a certain extent. If the sieve plate 43 continues to be driven to rotate by the swing shaft 41, the force of the torsion spring on the sieve plate 43 gradually exceeds the thrust of the spring shaft 72. Since the top of the telescopic end of the spring shaft 72 is arc-shaped, the spring shaft 72 is compressed and lowered. The sieve plate 43 will then be driven by the corresponding torsion spring to swing to be parallel with the support plate 42.

[0072] Two mounting slots 73 are symmetrically opened at the upper end of the main frame 70. The mounting slots 73 are used to install external air supply equipment (known technology, used to discharge high-pressure gas into the main frame 70 through a rectangular slot). When the screen plate 43 is tilted, some impurities on the screen plate 43 will fall off along its tilt direction, but some impurities will still stick to the screen plate 43. At this time, the external air supply equipment is activated to discharge high-pressure gas into the main frame 70. The high-pressure gas blows away the stubborn impurities on the screen plate 43, and the impurities can fall off and be discharged from the opening at the bottom of the main frame 70.

[0073] On both sides of the lower frame 10, there are also symmetrical guide plates 74, which correspond to the settling plate 5. When the settling plate 5 carries the sediment down, the high-pressure gas is introduced by the guide plate 74 to contact the settling plate 5 and blows the sediment on the inclined surface of the settling plate 5 off and discharged from the lower opening of the main frame 70. In addition, there is also a baffle 75 on the lower side of the settling plate 5, which corresponds to the outer side of the water collection tank 12. The baffle 75 is used to prevent the sediment from being blown between the water collection tank 12 and the lower frame 10 after the settling plate 5 descends, so that the sediment accumulates and is difficult to clean.

[0074] It should also be noted that the main frame 70 can be fixed to the ground by external support equipment, and the bottom of the water collection tank 12 can also be fixed to the ground by external support equipment passing through the lower opening of the main frame 70. Since the support equipment is something that those skilled in the art can conceive of, it will not be described in detail in this embodiment.

[0075] Example 4: Refer to Figure 16 and Figure 17 As shown, based on Embodiments 1, 2, and 3, in order to drive the rotating end of the valve body 62, the swing shaft 41, and the rotating drum 21 to rotate, a drive unit 8 is installed on the upper frame 1. Specifically, the drive unit 8 includes a drive cylinder 80, a transmission gear ring 81, a large gear ring 82, a drive motor 83, a drive gear 84, a reversing gear set 85, a driven gear 86, a bending plate 87, and a drive rack 88. The drive cylinder 80 is installed on the upper frame 1 through a cylinder seat. The upper end of the swing shaft 41 extends out to a corresponding limiting frame 40 and is fitted with a transmission gear ring 81 on the outside. The swing shafts 41 are connected to each other through a belt drive. That is, when one side of the swing shaft 41 is driven to rotate by the transmission gear ring 81, the other side of the swing shaft 41 can be driven to rotate in the same direction by the belt drive.

[0076] The rotating end of the valve body 62 also extends out to form a corresponding rectangular block 60, and a large gear ring 82 is fitted on its outer side. The telescopic end of the drive cylinder 80 is equipped with a drive motor 83 through a motor base. The rotating end of the drive motor 83 is fitted with a drive gear 84, which corresponds to the transmission gear ring 81 and the large gear ring 82. The drive cylinder 80 can drive the drive motor 83 and the drive gear 84 to move up and down, so that the drive gear 84 can mesh with the transmission gear ring 81 and the large gear ring 82 respectively. This allows the drive motor 83 to drive the swing shaft 41 and the rotating end of the valve body 62 to rotate through the drive gear 84, the transmission gear ring 81, and the large gear ring 82 respectively, thereby realizing the switching of the screen plate 43 and the opening and closing of the valve body 62.

[0077] A reversing gear set 85 (composed of two sets of meshing gears) is also provided on the outer side of the lower frame 10. The end of the rotating drum 21 located outside the lower frame is connected to the middle shaft of the two gears on the reversing gear set 85 by belt drive. A driven gear 86 is also sleeved on the outer side of the rotating drum 21 on one side. That is, the driven gear 86 is driven to rotate by external force, which can drive the rotating drum 21 on one side to rotate, so as to achieve the effect of the rotating drum 21 pulling the sealing cloth 23. The rotating drum 21 can also drive the reversing gear set 85 to rotate by belt drive. The reversing gear set 85 can drive the rotating drum 21 on the other side to rotate in the opposite direction by belt drive. Since the pulling direction of the two sealing cloths 23 is opposite, the rotating drum 21 on the other side can also achieve the effect of pulling the corresponding sealing cloth 23.

[0078] The extension end of the drive cylinder 80 is provided with a bending plate 87, and the bent section of the bending plate 87 is used to avoid the rotation path of the screen plate 43. The lower side of the bending plate 87 extends to correspond to the driven gear 86 and is provided with a corresponding drive rack 88. That is, the drive cylinder 80 can drive the drive rack 88 to mesh with the driven gear 86 by driving the bending plate 87 to descend, thereby driving the driven gear 86 to rotate, thus achieving the effect of the above implementation process. It should be noted that when the drive gear 84 meshes with the transmission gear ring 81, the drive rack 88 will not mesh with the driven gear 86.

[0079] In addition, the present invention also provides an anaerobic treatment process for fruit juice processing wastewater, comprising the following steps:

[0080] S1, wastewater primary screening: The water supply frame 11 is connected to the external water supply equipment to discharge wastewater into the upper frame 1 and the lower frame 10, and large impurities in the wastewater are screened out by the screening component 4 during the process of the wastewater falling.

[0081] S2, Wastewater sedimentation: After initial screening, the wastewater will fall to the bottom of the lower frame 10. At this time, it will be left to stand for a period of time, so that the suspended solids in the wastewater will settle to the bottom of the lower frame 10 through the sedimentation tank 24. Then, the wastewater in the lower frame 10 will be anaerobically treated.

[0082] S3, solid-liquid separation: After the suspended solids settle to the bottom, the rotating drum 21 drives the sealing cloth 23 to roll around its outside. At this time, the sedimentation tank 24 is also rolled around the outside of the corresponding rotating drum 21, and the sealing cloth 23 separates the sewage and the sediment.

[0083] S4, Sewage discharge: Sewage is discharged into the water collection tank 12 through the winding assembly 3.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for anaerobic treatment of fruit juice processing wastewater comprising an upper frame (1) and a lower frame (10), characterized in that: A screen assembly (4) is mounted between the upper frame (1) and the lower frame (10), the lower frame (10) is provided with a barrier unit (2) on both sides for separating suspended and precipitated substances in sewage, the upper end of the upper frame (1) is provided with a water supply frame (11), and the lower side of the lower frame (10) penetrates a water collecting barrel (12); The barrier unit (2) comprises a rectangular frame (20) arranged on both sides of the lower frame (10), a rotating drum (21) rotatably arranged in the rectangular frame (20), a strip-shaped groove (22) formed in one side of the rectangular frame (20), a winding assembly (3) arranged on the inner bottom wall of the lower frame (10), and a blocking cloth (23) wound between the winding assembly (3) and the rotating drum (21), wherein a precipitation groove (24) is formed in the blocking cloth (23). The winding assembly (3) comprises a conical block (30) arranged on the inner bottom wall of the lower frame (10), a circular groove (31) symmetrically formed in the conical block (30), the outer side of the circular groove (31) penetrating the lower frame (10) and the water collecting barrel (12), and a winding shaft (32) rotatably arranged in the circular groove (31) through a torsion spring. One side of the blocking cloth (23) extends into the rotating drum (21), and a water inlet groove (33) is formed in the inside of the blocking cloth (23) on one side of the rotating drum (21). A plurality of through grooves penetrating the water inlet groove (33) are formed in the side of the precipitation groove (24) facing the rotating drum (21), and a one-way valve (34) is arranged in the through groove.

2. The apparatus for anaerobic treatment of fruit juice processing wastewater according to claim 1, characterized in that: One end of the blocking cloth (23) is connected with the winding shaft (32) on the corresponding side through the opening of the circular groove (31), and the thickness of the blocking cloth (23) gradually decreases in the direction towards the winding shaft (32).

3. The apparatus for anaerobic treatment of fruit juice processing wastewater according to claim 1, characterized in that: The screen assembly (4) comprises limiting frames (40) symmetrically arranged on both sides of the upper frame (1) and the lower frame (10), a swing shaft (41) rotatably arranged in the limiting frame (40), a support plate (42) sleeved on the outer side of the swing shaft (41), screen plates (43) rotatably arranged on both sides of the support plate (42) through torsion springs, and the screen plates (43) on one side of the two support plates (42) located in the gap between the upper frame (1) and the lower frame (10).

4. The apparatus for anaerobic treatment of fruit juice processing wastewater according to claim 3, characterized in that: The heights of the two support plates (42) are inconsistent, and screen grooves (44) are formed in the screen plates (43) on the upper and lower sides.

5. The apparatus for anaerobic treatment of fruit juice processing wastewater according to claim 1, characterized in that: Symmetrical sliding grooves corresponding to the precipitation grooves (24) are formed in the inner bottom wall of the lower frame (10), a sedimentation plate (5) slides in the sliding groove, and one side of the sedimentation plate (5) is inclined.

6. The apparatus for anaerobic treatment of fruit juice processing wastewater according to claim 5, characterized in that: A push air cylinder (50) is symmetrically arranged on the water collecting barrel (12) through an air cylinder seat, and the extension end of the push air cylinder (50) is connected with the sedimentation plate (5).

7. An anaerobic treatment process for juice processing wastewater using an anaerobic treatment apparatus for juice processing wastewater according to any one of claims 1 to 6, characterized by The treatment process comprises the following steps: S1, sewage preliminary screening: the water supply frame (11) is connected with an external water supply device to discharge sewage into the upper frame (1) and the lower frame (10), and large impurities in the sewage are screened out by the screen assembly (4) during the falling process of the sewage; S2, sewage precipitation: after the preliminary screening of the sewage, the sewage will fall to the bottom of the lower frame (10), at this time, the suspended solids in the sewage are allowed to settle to the bottom of the lower frame (10) through the sedimentation tank (24) after a period of standing, and then the sewage in the lower frame (10) is subjected to anaerobic treatment; S3, solid-liquid separation: after the suspended solids settle to the bottom, the rotating drum (21) drives the blocking cloth (23) to be wound outside it, at this time, the sedimentation tank (24) is also wound outside the corresponding rotating drum (21), and the blocking cloth (23) separates the sewage and the sediment; S4, sewage discharge: the sewage is discharged into the water collecting barrel (12) through the winding assembly (3).

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