Device and method for treating wastewater generated in dairy product processing

Abstract

The invention relates to the technical field of dairy product wastewater treatment, and particularly discloses a treatment device and a treatment method for wastewater generated in dairy product processing. Components in the wastewater are different in density and are independently output through structure arrangement in a tank body; wherein a floating oil assembly, a suspension assembly and a precipitation assembly are arranged in the tank body, the floating oil assembly is used for separating the uppermost floating oil layer and independently outputting the floating oil layer, and the suspension assembly can be used for separating suspended matters and water-soluble matters in a mixed state in the suspended matter layer and the water-soluble matter layer and outputting the suspended matters and the water-soluble matters respectively; the precipitation assembly can separate precipitates in the precipitation layer and independently output the precipitates, and compared with the mode that in the prior art, a flocculating agent is added and filtered is mostly adopted for treating the dairy product wastewater, all components in the wastewater are output separately, recycling of all the components in the wastewater is facilitated, and the wastewater treatment efficiency is improved. The enterprise cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of dairy wastewater treatment, and in particular to a wastewater treatment device and method for dairy processing wastewater. Background Art

[0002] It is crucial to treat dairy wastewater because the wastewater generated during dairy processing contains a large amount of organic matter, suspended solids, grease, and inorganic salts. If these pollutants are directly discharged into the environment without proper treatment, they will seriously pollute the water source, consume the dissolved oxygen in the water body, lead to water quality deterioration, and affect the survival of aquatic organisms and the ecological balance. Therefore, scientific treatment of dairy wastewater is an important measure to protect water resources, maintain the ecological environment, and human health.

[0003] In the prior art, for the treatment of dairy wastewater, most methods adopt the way of adding flocculants and filtering. This method first adds appropriate flocculants, such as polyaluminum chloride (PAC) or polyacrylamide (PAM), to rapidly coagulate the tiny suspended particles, colloidal substances, and some dissolved organic matters in the wastewater into larger flocs. These flocs then settle under the action of gravity or float with the help of a flotation device, thus realizing solid-liquid separation. After preliminary sedimentation or flotation treatment, the wastewater will enter the filtration stage. Common filtration media include sand filtration, activated carbon filter media, or multi-media filters, etc. These filtration media can further intercept the suspended solids, colloids, and some dissolved impurities in the wastewater, improving the water clarity.

[0004] For the above related technologies, simply adopting the flocculation filtration method will cause the various components in the wastewater to be mixed together to form waste. If it is necessary to recycle and reuse the various components in the wastewater, it will require a large amount of manpower, material resources, etc. Therefore, improvements are made to this. Summary of the Invention

[0005] In order to realize the recycling and reuse of the various components in the wastewater, this application provides a wastewater treatment device and method for dairy processing wastewater.

[0006] A wastewater treatment device for dairy processing wastewater provided by this application adopts the following technical solutions: A wastewater treatment device for dairy product processing, including a tank body. An inlet and an outlet are arranged on the side wall of the tank body. A discharge port is arranged below the tank body. A driving motor is arranged above the tank body. A lead screw is arranged in the tank body. One end of the lead screw is connected to the output shaft of the driving motor. A floating oil component for separating the floating oil layer in the tank body and outputting it is arranged on the lead screw. A suspension component for separating the suspension layer and the water-soluble substance layer and outputting them separately is also arranged. And a precipitation component for separating the precipitation layer and outputting and precipitating it is also arranged.

[0007] By adopting the above technical solution, the wastewater generated by general dairy product processing contains suspended substances such as grease and solid whey, dissolved substances such as lactose dissolved in water, and precipitates such as inorganic salts. After the wastewater is statically settled, due to the different densities and solubilities of each component in the wastewater, a floating oil layer - suspension layer, a water-soluble substance layer - precipitation layer will appear. Among them, the suspension layer and the water-soluble substance layer are in an incompatible mixed state. After the wastewater is input into the tank body through the inlet and statically settled to form a floating oil layer - suspension layer, a water-soluble substance layer - precipitation layer, the driving motor is started. The driving motor drives the lead screw to rotate. While the lead screw rotates, it can drive the floating oil component in the present application to separate the uppermost floating oil layer and output it separately. The suspension component can separate the suspended substances and water-soluble substances in the mixed state in the suspension layer and the water-soluble substance layer and output the suspended substances and water-soluble substances separately. The precipitation component can separate the precipitates in the precipitation layer with a certain amount of accumulation and output them separately.

[0008] In the prior art, most of the treatment of dairy product wastewater adopts the method of adding flocculants and filtering. This method will cause each component in the wastewater to be mixed together to form waste. If it is necessary to recycle and reuse each component in the wastewater, it will require a large amount of manpower, material resources, etc. The present application outputs each component in the wastewater separately, so as to facilitate the recycling and reuse of each component in the wastewater and reduce the enterprise cost.

[0009] Optionally, the floating oil component includes an oil extraction pipe, an oil extraction plate, a floating plate and a lifting and rotating structure. The oil extraction pipe is arranged on the side wall of the tank body. The oil extraction plate is rotatably arranged on the lead screw. A plurality of oil extraction ports are arranged on the oil extraction plate. The oil extraction pipe is communicated with the plurality of oil extraction ports. The floating plate is arranged below the oil extraction plate and is used to make the oil extraction plate float on the liquid surface. The lifting and rotating structure is arranged on the oil extraction plate and the lead screw and is used to lift and rotate the oil extraction plate.

[0010] By adopting the above technical solution, the lifting and rotating structure can drive the oil pumping plate to lift and rotate. First, the first lifting and rotating component drives the oil pumping plate to descend to the liquid level in the tank. Under the action of the floating plate, the oil pumping plate will float on the liquid surface. Then, the floating oil layer floating on the liquid surface is extracted and output through the oil pumping pipe and the oil pumping port opened on the oil pumping plate. At the same time, under the action of the rotation of the screw rod and the lifting and rotating structure, the oil pumping plate rotates around the screw rod, so as to more comprehensively extract, output and separate the floating oil layer on the liquid surface.

[0011] Optionally, the lifting and rotating structure includes a cylinder, a first lifting plate, a first rotating plate, a connecting plate, a abutting plate and a pressure sensor. The cylinder is arranged on the tank body, and the telescopic end is arranged in the tank body. The first lifting plate is rotatably arranged on the screw rod and is connected with the telescopic end of the cylinder. The first rotating plate is rotatably arranged on the surface of the first lifting plate away from the cylinder. The first rotating plate is threadedly connected with the screw rod. An lifting groove is opened on the surface of the first lifting plate away from the cylinder. The abutting plate is vertically movably arranged in the lifting groove. The connecting plate penetrates through and is vertically movably arranged on the first rotating plate, and one end is connected with the abutting plate and the other end is connected with the oil pumping plate. The pressure sensor is arranged in the lifting groove and is located on the side of the abutting plate away from the rotating plate. The pressure sensor is electrically connected with the cylinder.

[0012] By adopting the above technical solution, when the cylinder is started, the telescopic end of the cylinder extends to drive the first lifting plate to descend. And under the action of gravity, the oil pumping plate and the floating plate descend synchronously until the floating plate contacts the liquid level in the tank. Then, when the oil pumping plate floats on the liquid surface under the action of the floating plate, the abutting plate connected with the oil pumping plate through the connecting plate will abut against the pressure sensor. At this time, the length of the telescopic end of the cylinder no longer changes. Since the first rotating plate is rotatably installed on the first lifting plate and the first rotating plate is threadedly connected with the screw rod, when the screw rod drives the first rotating plate to rotate, the oil pumping plate can be driven to rotate synchronously through the connecting plate, so as to realize the lifting and rotation of the oil pumping plate, and thus more comprehensively extract, output and separate the floating oil layer on the liquid surface.

[0013] Optionally, the suspension assembly includes a fixed frame, an end cap, a flocculant input pipe, and a floc output pipe. The fixed frame is fixedly arranged inside the tank body and is rotatably connected to the lead screw. The end cap is arranged on the fixed frame, and a socket connection ring plate is arranged on the side of the end cap close to the fixed frame. A socket slot is opened on the fixed frame, and the socket connection ring plate is arranged to be lifted and lowered in the socket slot. An inlet channel is opened on the side wall of the fixed frame. When the socket connection ring plate is completely inserted into the socket slot, the inlet channel is in a closed state. The flocculant input pipe is arranged on the side wall of the tank body and communicates with the side of the end cap close to the fixed frame. The floc output pipe is arranged on the side wall of the tank body and communicates with the inner bottom surface of the fixed frame.

[0014] By adopting the above technical solution, when the lead screw rotates, since the fixed frame is fixed on the inner wall of the tank body and is rotatably connected to the lead screw, and the end cap is threadedly connected to the lead screw, and the end cap is inserted and installed on the socket slot of the fixed frame through the socket connection ring plate, the lifting of the end cap can be realized. When the end cap rises, the socket connection ring plate begins to extend out of the socket slot, and the inlet channel begins to open. The space enclosed by the end cap and the fixed frame increases, and the suspended matter and the water containing dissolved substances in the tank body enter the fixed frame. While the inlet channel is gradually opening, the flocculant input pipe begins to output flocculant, so that the suspended matter entering the fixed frame is flocculated into clusters. After the inlet channel is completely opened, the lead screw rotates in the reverse direction, and the end cap descends to compress the space enclosed by the end cap and the fixed frame until the inlet channel is closed. At this time, the water containing dissolved substances has been squeezed out of the fixed frame through the inlet channel, and the remaining floc clusters in the fixed frame are output through the floc output pipe, thereby realizing the separation of the suspended matter and the water containing dissolved substances.

[0015] Optionally, the precipitation assembly includes a second lifting plate, a second rotating plate, and a water permeable structure. The second lifting plate is rotatably connected to the lead screw. A lifting block is arranged on the side wall of the second lifting plate. A lifting groove is opened on the inner wall of the discharge port, and the lifting block is arranged to be lifted and lowered in the lifting groove. The second rotating plate is threadedly connected to the lead screw and is arranged on the side of the second lifting plate close to the drive motor. A rotating groove is opened on the side of the second lifting plate close to the second rotating plate. A rotating block is arranged on the side of the second rotating plate close to the second lifting plate, and the rotating block is slidably arranged in the rotating groove. The water permeable structure is arranged on the second lifting plate and the second rotating plate, and is used for allowing the precipitate to enter the discharge port and for discharging the water in the discharge port to reduce the moisture content of the output precipitate.

[0016] By adopting the above technical solution, when the lead screw rotates forward, since the second lifting plate is rotatably connected to the lead screw and the second rotating plate is threadedly connected to the lead screw, relative rotation will occur between the second lifting plate and the second rotating plate. And because there is a rotating groove on the surface of the second lifting plate close to the second rotating plate and a rotating block is arranged on the surface of the second rotating plate close to the second lifting plate, when the second lifting plate and the second rotating plate rotate relatively, when the rotating block moves to one end of the rotating groove, the second lifting plate and the second rotating plate remain relatively stationary. Also, since there is a lifting groove on the inner wall of the discharge port and a lifting block is arranged on the side wall of the second lifting plate, the synchronous rising of the second lifting plate and the second rotating plate can be realized. At this time, under the action of the water-permeable structure, the sediment enters the discharge port. On the contrary, when the lead screw rotates reversely, the second lifting plate and the second rotating plate descend synchronously. At this time, under the action of the water-permeable structure, the water in the discharge port can be squeezed out, reducing the moisture content in the discharged sediment, so as to facilitate the recycling and reuse of the sediment.

[0017] Optionally, the water-permeable structure includes water inlet holes, filtering holes and water-permeable holes. There are two groups of both the water inlet holes and the filtering holes. The two groups of water inlet holes are symmetrically arranged on the second rotating plate with the lead screw as the center, and the two groups of filtering holes are symmetrically arranged on the second rotating plate with the lead screw as the center. And the water inlet holes and the filtering holes are alternately arranged at intervals along the circumferential direction of the lead screw. A filter plate that only allows water to pass through is arranged on the filtering holes. There are two groups of the water-permeable holes, and the two groups of water-permeable holes are symmetrically arranged on the second lifting plate with the lead screw as the center. In the initial state, the second lifting plate and the second rotating plate are located at the upper end of the discharge port, the rotating block is located at one end of the rotating groove, and the water inlet holes are aligned with the water-permeable holes. At this time, the sediment enters the discharge port. As the second lifting plate and the second rotating plate descend, when the rotating block moves to the other end of the rotating groove, the filtering holes are aligned with the water-permeable holes. At this time, the water in the discharge port is output from the filtering holes.

[0018] By adopting the above technical solution, in the initial state, the second lifting plate and the second rotating plate are located at the upper end of the discharge port, the rotating block is located at one end of the rotating groove, and the water inlet holes are aligned with the water-permeable holes. At this time, the sediment enters the discharge port. At this time, the lead screw rotates reversely. After the rotating block moves to the other end of the rotating groove, the filtering holes are aligned with the water-permeable holes. As the second lifting plate and the second rotating plate descend, at this time, the water in the discharge port is output from the filtering holes, so as to realize the extrusion of the sediment in the discharge port. The water in the discharge port is output from the filtering holes. When a certain amount of sediment is squeezed in the discharge port, the squeezed sediment can be discharged, thus facilitating the recycling and reuse of the sediment.

[0019] Optionally, a rotating shaft is provided on the second rotating plate, and a flip cover is provided on the rotating shaft. The flip cover is used to cover the filtering holes, and a torsion spring is provided on the rotating shaft to press the flip cover against the filtering holes.

[0020] By adopting the above technical solution, when the second lifting plate and the second rotating plate descend to squeeze the sediment in the discharge port, the pressure in the discharge port increases, and water can flow out from the gap between the flip cover and the second rotating plate to the second rotating plate. After the squeezing is completed, under the action of the torsion spring, the flip cover closes so that water cannot flow into the lower part of the second lifting plate, which further facilitates the accumulation and output of the sediment, and can further reduce the carried moisture, facilitating the recycling of the sediment.

[0021] Optionally, the end of the floating plate away from the oil pumping plate is inclined.

[0022] By adopting the above technical solution, the inclined setting of the end of the floating plate away from the oil pumping plate can further facilitate the extraction of the floating oil layer and improve the extraction effect of floating substances.

[0023] This application also includes a method for treating wastewater generated in dairy product processing, which includes the following steps: S1: First, add the wastewater generated in dairy product processing into the tank and let it stand for stratification. After standing, the wastewater generated in processing forms a floating oil layer - suspended matter layer, a water-soluble matter layer - sediment layer; S2: Start the cylinder. The telescopic end of the cylinder extends to drive the oil pumping plate and the floating plate to descend until the floating plate contacts the liquid level in the tank until the abutting plate abuts against the pressure sensor, and the telescopic end of the cylinder stops extending. The lead screw drives the oil pumping plate to rotate through the first rotating plate, and the floating oil layer floating on the liquid surface is extracted and output through the oil suction pipe and the oil pumping plate; S3: The lead screw rotates forward to drive the end cover to rise, and the water inlet channel starts to open. The suspended matter and the water containing dissolved substances in the tank enter the fixed frame, and the flocculant input pipe starts to output the flocculant. After the water inlet channel is completely opened, the lead screw rotates reversely until the water inlet channel is closed, and the water containing dissolved substances has been squeezed out of the fixed frame through the water inlet channel, and the flocculant mass is output through the flocculant output pipe; S4: When the lead screw rotates forward, after the rotating block moves to one end of the rotating groove, the second lifting plate and the second rotating plate remain relatively stationary and then rise. At this time, under the action of the water permeable structure, the sediment enters the discharge port. On the contrary, when the lead screw rotates reversely, the second lifting plate and the second rotating plate descend synchronously. At this time, under the action of the water permeable structure, the water in the discharge port can be squeezed out, and the discharge port is opened to separate and output the sediment.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The wastewater generated from general dairy product processing contains suspended substances such as grease and solid whey, dissolved substances such as lactose dissolved in water, and precipitates such as inorganic salts. In the prior art, most of the treatment of dairy wastewater adopts the method of adding flocculants and filtering. This method will cause the various components in the wastewater to mix together to form waste. If it is necessary to recycle and reuse the various components in the wastewater, it will require a large amount of manpower, material resources, etc. This application outputs the various components in the wastewater separately, so as to facilitate the recycling and reuse of the various components in the wastewater and reduce the enterprise cost; 2. When the lead screw rotates, since the fixed frame is fixed on the inner wall of the tank body and is rotatably connected to the lead screw, and the end cover is threadedly connected to the lead screw, and the end cover is inserted and installed on the insertion slot of the fixed frame through the insertion and clamping ring plate, the lifting of the end cover can be realized. When the end cover rises, the insertion and clamping ring plate begins to extend out of the insertion slot, and the water inlet channel begins to open. The space enclosed by the end cover and the fixed frame increases, and the suspended substances and the water containing dissolved substances in the tank body enter the fixed frame. While the water inlet channel is gradually opening, the flocculant input pipe begins to output flocculants, so that the suspended substances entering the fixed frame are flocculated into groups. When the water inlet channel is completely opened, the lead screw rotates in the reverse direction, and the end cover descends to compress the space enclosed by the end cover and the fixed frame until the water inlet channel is closed. At this time, the water containing dissolved substances has been squeezed out of the fixed frame through the water inlet channel, and the remaining flocculant groups in the fixed frame are output through the flocculant output pipe, thereby realizing the separation of the suspended substances and the water containing dissolved substances; 3. In the initial state, the second lifting plate and the second rotating plate are located above the discharge port, the rotating block is located at one end of the rotating groove, and the water inlet hole is aligned with the water permeable hole. At this time, the precipitate enters the discharge port. At this time, the lead screw rotates in the reverse direction. After the rotating block moves to the other end of the rotating groove, the filtering hole is aligned with the water permeable hole. As the second lifting plate and the second rotating plate descend, the water in the discharge port is output from the filtering hole at this time, thereby realizing the extrusion of the precipitate in the discharge port. The water in the discharge port is output from the filtering hole. When a certain amount of precipitate is extruded in the discharge port, the extruded precipitate can be output, so as to facilitate the recycling and reuse of the precipitate. When the second lifting plate and the second rotating plate descend to extrude the precipitate in the discharge port, the pressure in the discharge port increases, and the water can flow out from the gap between the flip cover and the second rotating plate to the second rotating plate. When the extrusion is completed, under the action of the torsion spring, the flip cover closes so that the water cannot flow into the lower part of the second lifting plate, which further facilitates the accumulation and output of the precipitate, and can further reduce the carried moisture, facilitating the recycling and reuse of the precipitate. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is the overall structural schematic diagram of the embodiments of the present application; Figure 2 is Figure 1 the partial sectional schematic diagram of; Figure 3 is Figure 2 the schematic diagram of another perspective of; Figure 4 is Figure 3 the sectional structural schematic diagram of; Figure 5 is Figure 4 the enlarged structural schematic diagram of part A of; Figure 6 is Figure 3 the exploded schematic diagram of the partial structure of.

[0027] Reference numerals: 1, tank body; 11, water inlet; 12, water outlet; 13, discharge port; 14, drive motor; 15, lead screw; 2, floating oil assembly; 21, oil suction pipe; 22, oil suction plate; 23, floating plate; 24, lifting and rotating structure; 241, cylinder; 242, first lifting plate; 243, first rotating plate; 244, connecting plate; 245, abutting plate; 246, pressure sensor; 25, oil suction port; 3, suspension assembly; 31, fixed frame; 32, end cover; 33, flocculant input pipe; 34, floc output pipe; 35, socket and clamping ring plate; 36, water inlet channel; 4, precipitation assembly; 41, second lifting plate; 42, second rotating plate; 43, water permeable structure; 431, water inlet hole; 432, filtering hole; 433, water permeable hole; 434, filter plate; 44, lifting block; 45, lifting groove; 46, rotating block; 47, rotating groove; 5, flip cover. Detailed implementation manners

[0028] The following will further elaborate on the present application in conjunction with the attached Figures 1-6 drawings.

[0029] The embodiments of the present application disclose a wastewater treatment device and treatment method for dairy product processing. Refer to Figures 1-6, A wastewater treatment device for dairy product processing, including a tank body 1. An inlet 11 and an outlet 12 are provided on the side wall of the tank body 1. A discharge port 13 is provided below the tank body 1. A driving motor 14 is provided above the tank body 1. A lead screw 15 is provided inside the tank body 1. One end of the lead screw 15 is connected to the output shaft of the driving motor 14. A floating oil component 2 is provided on the lead screw 15 for separating the floating oil layer in the tank body 1 and outputting it. A suspension component 3 is also provided for separating the suspension layer and the water-soluble substance layer and outputting them separately. And a precipitation component 4 is also provided for separating the precipitation layer and outputting and precipitating it.

[0030] Generally, the wastewater generated from dairy product processing contains suspended substances such as oils and fats, solid whey, dissolved substances such as lactose dissolved in water, and precipitates such as inorganic salts. After the wastewater is left standing, due to the different densities and solubilities of the various components in the wastewater, a floating oil layer - suspension layer and a water-soluble substance layer - precipitation layer will appear. Among them, the suspension layer and the water-soluble substance layer are in an incompatible mixed state. After the wastewater is input into the tank body 1 through the inlet 11 and left standing to form a floating oil layer - suspension layer and a water-soluble substance layer - precipitation layer, the driving motor 14 is started. The driving motor 14 drives the lead screw 15 to rotate. While the lead screw 15 rotates, it can drive the floating oil component 2 in this application to separate the uppermost floating oil layer and output it separately. The suspension component 3 can separate the suspended substances and water-soluble substances in the mixed state in the suspension layer and the water-soluble substance layer, and output the suspended substances and water-soluble substances separately. The precipitation component 4 can separate the precipitates in the precipitation layer that has accumulated a certain amount and output them separately.

[0031] In the prior art, most of the treatment of dairy wastewater is carried out by adding flocculants and filtering. This method will cause the various components in the wastewater to be mixed together to form waste. If it is necessary to recycle and reuse the various components in the wastewater, it will require a large amount of manpower, material resources, etc. This application outputs the various components in the wastewater separately, so as to facilitate the recycling and reuse of the various components in the wastewater and reduce the enterprise cost.

[0032] In order to clean the floating oil layer after static stratification, the floating oil component 2 in this embodiment includes an oil extraction pipe 21, an oil extraction plate 22, a floating plate 23 and a lifting and rotating structure 24. The oil extraction pipe 21 is provided on the side wall of the tank body 1. The oil extraction plate 22 is rotatably provided on the lead screw 15. Multiple oil extraction ports 25 are provided on the oil extraction plate 22. The oil extraction pipe 21 is communicated with the multiple oil extraction ports 25. The floating plate 23 is provided below the oil extraction plate 22 for floating the oil extraction plate 22 on the liquid surface. The lifting and rotating structure 24 is provided on the oil extraction plate 22 and the lead screw 15 for lifting and rotating the oil extraction plate 22. The end of the floating plate 23 away from the oil extraction plate 22 is inclined.

[0033] In this embodiment, the lifting and rotating structure 24 can drive the oil pumping plate 22 to lift and rotate. First, the first lifting and rotating assembly drives the oil pumping plate 22 to descend to the liquid level in the tank body 1. Under the action of the floating plate 23, the oil pumping plate 22 will float on the liquid surface. Then, the floating oil layer floating on the liquid surface is extracted and output through the oil pumping pipe 21 and the oil pumping port 25 opened on the oil pumping plate 22. At the same time, under the action of the rotation of the lead screw 15 and the lifting and rotating structure 24, the oil pumping plate 22 rotates around the lead screw 15, so as to more comprehensively extract, output and separate the floating oil layer on the liquid surface. The end of the floating plate 23 far from the oil pumping plate 22 is inclined, which can further facilitate the extraction of the floating oil layer and improve the extraction effect of floating objects.

[0034] Therefore, the lifting and rotating structure 24 in this embodiment includes a cylinder 241, a first lifting plate 242, a first rotating plate 243, a connecting plate 244, an abutting plate 245 and a pressure sensor 246. The cylinder 241 is arranged on the tank body 1, and the telescopic end is arranged in the tank body 1. The first lifting plate 242 is rotatably arranged on the lead screw 15 and is connected to the telescopic end of the cylinder 241. The first rotating plate 243 is rotatably arranged on the surface of the first lifting plate 242 far from the cylinder 241. The first rotating plate 243 is threadedly connected to the lead screw 15. A lifting groove 45 is opened on the surface of the first lifting plate 242 far from the cylinder 241. The abutting plate 245 is vertically movably arranged in the lifting groove 45. The connecting plate 244 penetrates and is vertically movably arranged on the first rotating plate 243, and one end is connected to the abutting plate 245 and the other end is connected to the oil pumping plate 22. The pressure sensor 246 is arranged in the lifting groove 45 and is located on the side of the abutting plate 245 far from the rotating plate. The pressure sensor 246 is electrically connected to the cylinder 241.

[0035] When the cylinder 241 is started, the telescopic end of the cylinder 241 extends to drive the first lifting plate 242 to descend. And under the action of gravity, the oil pumping plate 22 and the floating plate 23 descend synchronously until the floating plate 23 contacts the liquid level in the tank body 1. Then, when the oil pumping plate 22 floats on the liquid surface under the action of the floating plate 23, the abutting plate 245 connected to the oil pumping plate 22 through the connecting plate 244 will abut against the pressure sensor 246. At this time, the length of the telescopic end of the cylinder 241 will no longer change. Since the first rotating plate 243 is rotatably installed on the first lifting plate 242 and the first rotating plate 243 is threadedly connected to the lead screw 15, when the lead screw 15 drives the first rotating plate 243 to rotate, the oil pumping plate 22 can be driven to rotate synchronously through the connecting plate 244, so as to realize the lifting and rotation of the oil pumping plate 22, and thus more comprehensively extract, output and separate the floating oil layer on the liquid surface.

[0036] In order to separate the suspended matter from the wastewater, the suspension assembly 3 in this embodiment includes a fixed frame 31, an end cover 32, a flocculant input pipe 33, and a floc output pipe 34. The fixed frame 31 is fixedly arranged in the tank body 1 and is rotatably connected to the lead screw 15. The end cover 32 is arranged on the fixed frame 31, and a socket clamping ring plate 35 is arranged on the side of the end cover 32 close to the fixed frame 31. A socket slot is formed on the fixed frame 31, and the socket clamping ring plate 35 is arranged to move up and down in the socket slot. An inlet channel 36 is formed on the side wall of the fixed frame 31. When the socket clamping ring plate 35 is completely inserted into the socket slot, the inlet channel 36 is in a closed state. The flocculant input pipe 33 is arranged on the side wall of the tank body 1 and communicates with the side of the end cover 32 close to the fixed frame 31. The floc output pipe 34 is arranged on the side wall of the tank body 1 and communicates with the inner bottom surface of the fixed frame 31.

[0037] When the lead screw 15 rotates, since the fixed frame 31 is fixed on the inner wall of the tank body 1 and is rotatably connected to the lead screw 15, and the end cover 32 is threadedly connected to the lead screw 15, and the end cover 32 is inserted and installed on the socket slot of the fixed frame 31 through the socket clamping ring plate 35, the lifting of the end cover 32 can be realized. When the end cover 32 rises, the socket clamping ring plate 35 begins to extend out of the socket slot, and the inlet channel 36 begins to open. The space enclosed by the end cover 32 and the fixed frame 31 increases, and the suspended matter and the water containing dissolved substances in the tank body 1 enter the fixed frame 31. While the inlet channel 36 is gradually opening, the flocculant input pipe 33 begins to output the flocculant, so that the suspended matter entering the fixed frame 31 is flocculated into clusters. After the inlet channel 36 is completely opened, the lead screw 15 rotates in the reverse direction, and the end cover 32 descends to compress the space enclosed by the end cover 32 and the fixed frame 31 until the inlet channel 36 is closed. At this time, the water containing dissolved substances has been squeezed out of the fixed frame 31 through the inlet channel 36, and the remaining floc clusters in the fixed frame 31 are output through the floc output pipe 34, thereby realizing the separation of the suspended matter and the water containing dissolved substances.

[0038] In order to separately separate and output the precipitate, the precipitation assembly 4 in this embodiment includes a second lifting plate 41, a second rotating plate 42 and a water-permeable structure 43. The second lifting plate 41 is rotatably connected to the lead screw 15. A lifting block 44 is provided on the side wall of the second lifting plate 41. A lifting groove 45 is formed on the inner wall of the discharge port 13, and the lifting block 44 is arranged to lift in the lifting groove 45. The second rotating plate 42 is threadedly connected to the lead screw 15 and is arranged on the side of the second lifting plate 41 close to the driving motor 14. A rotating groove 47 is formed on the side of the second lifting plate 41 close to the second rotating plate 42. A rotating block 46 is provided on the side of the second rotating plate 42 close to the second lifting plate 41, and the rotating block 46 is slidably arranged in the rotating groove 47. The water-permeable structure 43 is arranged on the second lifting plate 41 and the second rotating plate 42, and is used for allowing the precipitate to enter the discharge port 13 and for discharging the water in the discharge port 13, so as to reduce the moisture contained in the output precipitate.

[0039] When the lead screw 15 rotates forward, since the second lifting plate 41 is rotatably connected to the lead screw 15 and the second rotating plate 42 is threadedly connected to the lead screw 15, relative rotation will occur between the second lifting plate 41 and the second rotating plate 42. And because a rotating groove 47 is formed on the side of the second lifting plate 41 close to the second rotating plate 42 and a rotating block 46 is provided on the side of the second rotating plate 42 close to the second lifting plate 41, relative rotation occurs between the second lifting plate 41 and the second rotating plate 42. When the rotating block 46 moves to one end of the rotating groove 47, the second lifting plate 41 and the second rotating plate 42 remain relatively stationary. Also, since a lifting groove 45 is formed on the inner wall of the discharge port 13 and a lifting block 44 is provided on the side wall of the second lifting plate 41, synchronous rising of the second lifting plate 41 and the second rotating plate 42 can be achieved. At this time, under the action of the water-permeable structure 43, the precipitate enters the discharge port 13. On the contrary, when the lead screw 15 rotates reversely, the second lifting plate 41 and the second rotating plate 42 descend synchronously. At this time, under the action of the water-permeable structure 43, the water in the discharge port 13 can be squeezed out, reducing the moisture contained in the output precipitate, thereby facilitating the recycling of the precipitate.

[0040] The water-permeable structure 43 includes a water inlet hole 431, a filtering hole 432, and a water-permeable hole 433. There are two groups of both the water inlet hole 431 and the filtering hole 432. The two groups of water inlet holes 431 are symmetrically arranged on the second rotating plate 42 with the screw rod 15 as the center. The two groups of filtering holes 432 are symmetrically arranged on the second rotating plate 42 with the screw rod 15 as the center. And the water inlet hole 431 and the filtering hole 432 are arranged alternately at intervals along the circumferential direction of the screw rod 15. A filter plate 434 that only allows water to pass through is arranged on the filtering hole 432. There are two groups of water-permeable holes 433. The two groups of water-permeable holes 433 are symmetrically arranged on the second lifting plate 41 with the screw rod 15 as the center. In the initial state, the second lifting plate 41 and the second rotating plate 42 are located at the upper end of the discharge port 13. The rotating block 46 is located at one end of the rotating groove 47. The water inlet hole 431 is aligned with the water-permeable hole 433. At this time, the sediment enters the discharge port 13. As the second lifting plate 41 and the second rotating plate 42 descend, when the rotating block 46 moves to the other end of the rotating groove 47, the filtering hole 432 is aligned with the water-permeable hole 433. At this time, the water in the discharge port 13 is output from the filtering hole 432.

[0041] In the initial state, the second lifting plate 41 and the second rotating plate 42 are located at the upper end of the discharge port 13. The rotating block 46 is located at one end of the rotating groove 47. The water inlet hole 431 is aligned with the water-permeable hole 433. At this time, the sediment enters the discharge port 13. At this time, the screw rod 15 rotates in the reverse direction. After the rotating block 46 moves to the other end of the rotating groove 47, the filtering hole 432 is aligned with the water-permeable hole 433. As the second lifting plate 41 and the second rotating plate 42 descend, at this time, the water in the discharge port 13 is output from the filtering hole 432, so as to realize the extrusion of the sediment in the discharge port 13. The water in the discharge port 13 is output from the filtering hole 432. When a certain amount of sediment is extruded in the discharge port 13, the extruded sediment can be output, thus facilitating the recycling and reuse of the sediment.

[0042] A rotating shaft is further arranged on the second rotating plate 42. A flip cover 5 is arranged on the rotating shaft. The flip cover 5 is used to cover the filtering hole 432. A torsion spring for pressing the flip cover 5 on the filtering hole 432 is arranged on the rotating shaft. When the second lifting plate 41 and the second rotating plate 42 descend to extrude the sediment in the discharge port 13, the pressure in the discharge port 13 increases. Water can flow out from the gap between the flip cover 5 and the second rotating plate 42 to the upper part of the second rotating plate 42. When the extrusion is completed, under the action of the torsion spring, the flip cover 5 closes so that water cannot flow into the lower part of the second lifting plate 41, thus further facilitating the accumulation and output of the sediment, and further reducing the carried moisture, which is convenient for the recycling and reuse of the sediment.

[0043] The implementation principle of the wastewater treatment device for dairy product processing in the embodiment of the present application is as follows: First, add the wastewater generated from dairy product processing into tank 1 and let it stand for layering. After standing, the wastewater generated from processing forms an oil slick layer - suspended matter layer and a water-soluble matter layer - sediment layer.

[0044] When it is necessary to separate and output the oil slick layer, start cylinder 241. The telescopic end of cylinder 241 extends to drive the oil pumping plate 22 and the floating plate 23 to descend until the floating plate 23 contacts the liquid level in tank 1 until the abutting plate 245 abuts against the pressure sensor 246. The telescopic end of cylinder 241 stops extending. The lead screw 15 drives the oil pumping plate 22 to rotate through the first rotating plate 243, and the oil slick layer floating on the liquid surface is extracted and output through the oil suction pipe 21 and the oil pumping plate 22.

[0045] When it is necessary to separate and output the suspended matter, the lead screw 15 rotates forward to drive the end cover 32 to rise, and the water inlet channel 36 starts to open. The suspended matter and the water containing dissolved substances in tank 1 enter the fixed frame 31, and the flocculant input pipe 33 starts to output the flocculant. After the water inlet channel 36 is completely opened, the lead screw 15 rotates reversely until the water inlet channel 36 is closed. The water containing dissolved substances has been squeezed out of the fixed frame 31 through the water inlet channel 36, and the flocculant mass is output through the flocculant output pipe 34.

[0046] When it is necessary to separate and output the sediment, when the lead screw 15 rotates forward, after the rotating block 46 moves to one end of the rotating groove 47, the second lifting plate 41 and the second rotating plate 42 remain relatively stationary and then rise. At this time, under the action of the water permeable structure 43, the sediment enters the discharge port 13. On the contrary, when the lead screw 15 rotates reversely, the second lifting plate 41 and the second rotating plate 42 descend synchronously. At this time, under the action of the water permeable structure 43, the water in the discharge port 13 can be squeezed out, and the discharge port 13 is opened to separate and output the sediment.

[0047] Refer to Figures 1-6 , this application also discloses a method for treating wastewater generated from dairy product processing, including the following steps: S1: First, add the wastewater generated from dairy product processing into tank 1 and let it stand for layering. After standing, the wastewater generated from processing forms an oil slick layer - suspended matter layer and a water-soluble matter layer - sediment layer; S2: Start cylinder 241. The telescopic end of cylinder 241 extends to drive the oil pumping plate 22 and the floating plate 23 to descend until the floating plate 23 contacts the liquid level in tank 1 until the abutting plate 245 abuts against the pressure sensor 246. The telescopic end of cylinder 241 stops extending. The lead screw 15 drives the oil pumping plate 22 to rotate through the first rotating plate 243, and the oil slick layer floating on the liquid surface is extracted and output through the oil suction pipe 21 and the oil pumping plate 22; S3: The lead screw 15 rotates forward to drive the end cap 32 to rise, and the water inlet channel 36 starts to open. The suspended matter and the water containing dissolved substances in the tank body 1 enter the fixed frame 31, and the flocculant input pipe 33 starts to output the flocculant. After the water inlet channel 36 is fully opened, the lead screw 15 rotates reversely until the water inlet channel 36 is closed. The water containing dissolved substances has been squeezed out of the fixed frame 31 through the water inlet channel 36, and the flocculant clusters are output through the flocculant output pipe 34; S4: When the lead screw 15 rotates forward, after the rotating block 46 moves to one end of the rotating groove 47, the second lifting plate 41 and the second rotating plate 42 remain relatively stationary and then rise. At this time, under the action of the water permeable structure 43, the sediment enters the discharge port 13. On the contrary, when the lead screw 15 rotates reversely, the second lifting plate 41 and the second rotating plate 42 descend synchronously. At this time, under the action of the water permeable structure 43, the water in the discharge port 13 can be squeezed out, and the discharge port 13 is opened to separate and output the sediment.

[0048] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The words "a" or "an" and similar terms do not denote a quantity limitation, but mean that there is at least one. The words "including" or "comprising" and similar terms mean that the elements or items appearing before "including" or "comprising" cover the elements or items listed after "including" or "comprising" and their equivalents, and do not exclude other elements or items. The terms "upper", "lower", "left", "right", etc. are only used to indicate the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0049] The above are all optional embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A wastewater treatment device generated by dairy product processing, comprising a tank body, characterized in that: A water inlet (11) and a water outlet (12) are arranged on the side wall of the tank body (1), a discharge port (13) is arranged below the tank body (1), a drive motor (14) is arranged above the tank body (1), a screw rod (15) is arranged inside the tank body (1), one end of the screw rod (15) is connected to the output shaft of the drive motor (14), and the screw rod (15) is provided with a floating oil component (2) for separating and outputting a floating oil layer in the tank body (1), a suspension component (3) for separating and outputting a suspended matter layer and a water-soluble matter layer, and a sediment component (4) for separating and outputting a sediment layer.

2. The wastewater treatment device generated by dairy product processing according to claim 1 is characterized by: The oil floating assembly (2) comprises an oil pumping pipe (21), an oil pumping plate (22), a floating plate (23) and a lifting and rotating structure (24); the oil pumping pipe (21) is arranged on the side wall of the tank body (1); the oil pumping plate (22) is rotatably arranged on the screw rod (15); a plurality of groups of oil pumping ports (25) are arranged on the oil pumping plate (22); the oil pumping pipe (21) is connected to the plurality of groups of oil pumping ports (25); the floating plate (23) is arranged below the oil pumping plate (22) and is used to make the oil pumping plate (22) float above the liquid surface; the lifting and rotating structure (24) is arranged on the oil pumping plate (22) and the screw rod (15) and is used to lift and rotate the oil pumping plate (22).

3. The wastewater treatment device generated by dairy product processing according to claim 2 is characterized by: The lifting and rotating structure (24) comprises a cylinder (241), a first lifting plate (242), a first rotating plate (243), a connecting plate (244), an abutting plate (245) and a pressure sensor (246); the cylinder (241) is arranged on the tank body (1), and the telescopic end is arranged in the tank body (1); the first lifting plate (242) is rotatably arranged on the screw rod (15) and connected to the telescopic end of the cylinder (241); the first rotating plate (243) is rotatably arranged on a side of the first lifting plate (242) away from the cylinder (241); the first rotating plate (243) is connected to the screw rod (15) threaded connection, a lifting groove (45) is provided on a side of the first lifting plate (242) away from the cylinder (241), the abutment plate (245) is vertically movably arranged in the lifting groove (45), the connecting plate (244) penetrates and is vertically movably arranged on the first rotating plate (243), one end of which is connected to the abutment plate (245) and the other end of which is connected to the oil pumping plate (22), the pressure sensor (246) is arranged in the lifting groove (45) and is located on a side of the abutment plate (245) away from the rotating plate, and the pressure sensor (246) is electrically connected to the cylinder (241).

4. The wastewater treatment device generated by dairy product processing according to claim 1 is characterized by: The suspension assembly (3) comprises a fixed frame (31), an end cover (32), a flocculant input pipe (33) and a flocculant output pipe (34); the fixed frame (31) is fixedly arranged in the tank body (1) and is rotatably connected to the screw rod (15); the end cover (32) is arranged on the fixed frame (31), and a socket-shaped clamping ring plate (35) is arranged on a surface of the end cover (32) close to the fixed frame (31); a socket slot is provided on the fixed frame (31), and the socket-shaped clamping ring plate (35) is raised and lowered. The water inlet channel (36) is arranged in the socket groove, and when the socket clamping ring plate (35) is completely socketed and arranged in the socket groove, the water inlet channel (36) is in a closed state. The flocculant input pipe (33) is arranged on the side wall of the tank body (1) and is connected to a side of the end cover (32) close to the fixed frame (31). The flocculant output pipe (34) is arranged on the side wall of the tank body (1) and is connected to the inner bottom surface of the fixed frame (31).

5. The wastewater treatment device generated by dairy product processing according to claim 1 is characterized by: The sedimentation assembly (4) comprises a second lifting plate (41), a second rotating plate (42) and a water-permeable structure (43); the second lifting plate (41) is rotatably connected to the screw rod (15); a lifting block (44) is provided on the side wall of the second lifting plate (41); a lifting groove (45) is provided on the inner wall of the discharge port (13); and the lifting block (44) is lifted and set in the lifting groove (45); the second rotating plate (42) is threadedly connected to the screw rod (15); and the second rotating plate (42) is provided on the second lifting plate (41) near the drive motor. The second lifting plate (41) is provided with a rotating groove (47) on one side of the second lifting plate (41) close to the second rotating plate (42); the second rotating plate (42) is provided with a rotating block (46) on one side of the second rotating plate (41) close to the second lifting plate (41); the rotating block (46) is slidably arranged in the rotating groove (47); the water-permeable structure (43) is arranged on the second lifting plate (41) and the second rotating plate (42) and is used to allow the sediment to enter the discharge port (13) and to discharge the water in the discharge port (13) to reduce the water content contained in the discharged sediment.

6. The wastewater treatment device generated by dairy product processing according to claim 5, characterized in that: The water permeable structure (43) comprises a water inlet hole (431), a filter hole (432) and a water permeable hole (433). The water inlet hole (431) and the filter hole (432) are each provided with two groups. The two groups of water inlet holes (431) are symmetrically arranged on the second rotating plate (42) with the screw rod (15) as the center. The two groups of filter holes (432) are symmetrically arranged on the second rotating plate (42) with the screw rod (15) as the center. The water inlet holes (431) and the filter holes (432) are alternately arranged at intervals along the circumference of the screw rod (15). The filter hole (432) is provided with a filter plate (434) for only water to pass through. The water permeable holes (433) are provided with two groups. The two groups of water permeable holes (433) are symmetrically arranged on the second rotating plate (42) with the screw rod (15) as the center. ) is symmetrically opened with the screw rod (15) as the center and is placed on the second lifting plate (41). In the initial state, the second lifting plate (41) and the second rotating plate (42) are located at the upper end of the discharge port (13), the rotating block (46) is located at one end of the rotating groove (47), and the water inlet hole (431) is aligned with the water permeable hole (433). At this time, the sediment enters the discharge port (13). As the second lifting plate (41) and the second rotating plate (42) descend, the rotating block (46) moves to the other end of the rotating groove (47), and the filtering hole (432) is aligned with the water permeable hole (433). At this time, the water in the discharge port (13) is discharged from the filtering hole (432).

7. The wastewater treatment device generated by dairy product processing according to claim 6, characterized in that: The second rotating plate (42) is provided with a rotating shaft, the rotating shaft is provided with a flip cover (5), the flip cover (5) is used to cover the filter hole (432), and the rotating shaft is provided with a torsion spring used to press the flip cover (5) onto the filter hole (432).

8. The wastewater treatment device generated by dairy product processing according to claim 2 is characterized by: The floating plate (23) is arranged obliquely away from the end of the oil pumping plate (22).

9. A method for treating wastewater generated by dairy product processing, based on a wastewater treatment device generated by dairy product processing according to any one of claims 1 to 8, characterized in that: The steps include: S1: First, the wastewater generated by the dairy product processing is added into the tank (1) and allowed to stand for stratification. After standing, the wastewater generated by the processing forms a floating oil layer-suspended matter layer, a water-soluble matter layer-sedimentation layer; S2: The cylinder (241) is started, and the telescopic end of the cylinder (241) is extended to drive the oil pumping plate (22) and the floating plate (23) to descend until the floating plate (23) contacts the liquid surface in the tank body (1), and until the abutment plate (245) abuts against the pressure sensor (246). The telescopic end of the cylinder (241) stops extending, and the screw rod (15) drives the oil pumping plate (22) to rotate through the first rotating plate (243), and the floating oil layer floating on the liquid surface is extracted and output through the oil pumping pipe (21) and the oil pumping plate (22); S3: The screw (15) rotates forward to drive the end cover (32) to rise, the water inlet channel (36) begins to open, the suspended matter and water containing dissolved matter in the tank body (1) enter the fixed frame (31), and the flocculant input pipe (33) begins to output flocculant. After the water inlet channel (36) is fully opened, the screw (15) rotates in the reverse direction until the water inlet channel (36) is closed, the water containing dissolved matter has been squeezed out of the fixed frame (31) through the water inlet channel (36), and the floccules are output through the flocculant output pipe (34); S4: When the screw rod (15) rotates in the forward direction, the rotating block (46) moves to one end of the rotating groove (47), and then the second lifting plate (41) and the second rotating plate (42) remain relatively still and then rise. At this time, under the action of the water-permeable structure (43), the sediment enters the discharge port (13). Conversely, the screw rod (15) rotates in the reverse direction, and the second lifting plate (41) and the second rotating plate (42) descend synchronously. At this time, under the action of the water-permeable structure (43), the water in the discharge port (13) can be squeezed out, and the discharge port (13) is opened to separate and discharge the sediment.

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