A slaughterhouse sewage treatment device

Abstract

This invention provides a slaughterhouse wastewater treatment device, comprising a filtration device, an oil removal device, and an integrated treatment device arranged sequentially along the wastewater flow direction. The filtration device performs at least two stages of filtration on the wastewater to remove particulate impurities and can clean the filter components. The oil removal device separates the upper layer of grease from the wastewater. The integrated treatment device performs biochemical treatment on the wastewater after slag and oil removal. It can perform dual filtration on slaughterhouse wastewater and clean the filter components, effectively filtering and separating impurities and reducing the amount of impurities entering downstream equipment. It can also perform separate separation of grease, improving separation quality and effectively reducing the amount of grease entering downstream processing stages, preventing blockage or damage to subsequent equipment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment, and more specifically, to a slaughterhouse wastewater treatment equipment. Background Technology

[0002] In poultry slaughterhouses, wastewater must be treated before it is discharged, which is a very important part of the production process. Slaughter wastewater contains a large amount of impurities such as fur, grease, meat scraps, and bone fragments, which cause serious environmental pollution. Traditional wastewater treatment equipment is often unable to effectively remove these pollutants, which can seriously affect the speed and efficiency of wastewater treatment, and may also cause equipment blockage or even damage, increasing maintenance costs and treatment difficulty. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a slaughterhouse wastewater treatment device, which can perform dual filtration treatment on slaughterhouse wastewater and clean the filter components to effectively filter and separate impurities, reducing the amount of impurities entering downstream equipment; and can also perform separate separation treatment on grease, improving the separation quality and effectively reducing the amount of grease entering downstream processing stages, preventing blockage or damage to subsequent equipment.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This invention provides a slaughterhouse wastewater treatment device, comprising a filtration device, an oil removal device, and an integrated treatment device arranged sequentially along the wastewater flow direction; the filtration device is used to perform at least two stages of filtration on the wastewater to remove particulate impurities from the wastewater and can clean the filtration components; the oil removal device is used to separate the upper layer of grease from the wastewater; and the integrated treatment device is used to perform biochemical treatment on the wastewater after slag and oil removal.

[0006] In a preferred embodiment of the present invention, the filtration device includes a first water tank, in which a first conveyor belt and a second conveyor belt are installed. The first conveyor belt is located on the side of the second conveyor belt away from the oil removal device, and the mesh size of the second conveyor belt is smaller than that of the first conveyor belt. The interior of the first water tank is divided into an inlet area, a first purification area, and a second purification area by the first and second conveyor belts. The side wall of the second purification area is provided with a first drain outlet for draining water to the oil removal device. Both the first and second conveyor belts are inclined, and their tops are bent toward the side of the oil removal device to form a straight section. Below the straight section, there is a cleaning structure and a slag discharge structure. The cleaning structure is used to brush and clean the surface of the conveyor belt, and the slag discharge structure is used to catch the falling impurities and send them to the outside.

[0007] In a preferred embodiment of the present invention, the cleaning structure includes a first brush roller and a second brush roller. The first brush roller and the second brush roller are rotatably mounted between the two walls of the first water tank via bearings. The first brush roller is located on the side of the second brush roller closer to the degreasing device. The outer wall of the first brush roller is fixedly provided with multiple first bristle strips extending along the length direction, and the multiple first bristle strips are arranged in a circumferential array around the axis of the first brush roller. The outer wall of the second brush roller is fixedly provided with second bristle strips, and the second bristle strips are spirally wound around the outer wall of the second brush roller. The bristles at the top of the first brush roller and the second brush roller extend to abut against the surface of the conveyor belt. Both cleaning structures are driven by a first motor.

[0008] In a preferred embodiment of the present invention, at least one electric heating tube is installed in the straight section of the second conveyor belt for drying the belt in the straight section.

[0009] In a preferred embodiment of the present invention, the slag discharge structure includes a trough and a spiral shaft. The trough is mounted between the two side walls of the first water tank, located below the straight section. The side of the trough near the oil removal device extends upward to a height above the top surface of the straight section, and the side of the trough away from the oil removal device extends upward to abut against the surface of the conveyor belt. The corresponding first brush roller and second brush roller are located inside the trough. The bottom of the trough has a concave arc shape. The wall of the first water tank is provided with a slag discharge port corresponding to the concave part of the trough. An extension cover is installed on the outside of the slag discharge port, and a discharge port is provided at the bottom of the extension cover. The spiral shaft is rotatably mounted between the extension cover and the wall of the first water tank. Both spiral shafts are driven by a second motor. The rotating spiral shaft is used to send the filter residue collected at the bottom of the trough to the outside.

[0010] In a preferred embodiment of the present invention, the inclined bottom ends of the first and second conveyor belts are internally supported by a support roller. The support roller includes a roller cylinder, with gears fixed at both ends. A tube is fixed to the outer wall of the gears, and the tube, the inner ring of the gear, and the roller are connected. The outer wall of the roller cylinder has multiple strip-shaped openings penetrating the inner wall, and the multiple strip-shaped openings are arranged in a circumferential array around the axis of the roller cylinder. The tubes at both ends are rotatably mounted on the wall of the first water tank through bearings. The tubes extend outward through the wall of the first water tank and are connected to the return pipe. The gears mesh with the toothed ring of the conveyor belt for transmission. The wall of the first water tank has two sets of return ports corresponding to the two sets of return pipes, and the end of the return pipe away from the tube is connected to the return port. The support roller of the first conveyor belt is connected to the first purification zone through the first return pipe, and the support roller of the second conveyor belt is connected to the second purification zone through the second return pipe.

[0011] In a preferred embodiment of the present invention, the oil removal device includes a second water tank and an oil-scooping mechanism installed on the top of the second water tank; the second water tank has an inlet connected to the first drain outlet on its side wall near the filter device; an oil collection tank is fixedly provided on the outer wall of the second water tank, and a discharge pipe is connected to the bottom of the oil collection tank, with a switch valve on the discharge pipe; an oil receiving tank is fixedly provided on the inner wall of the second water tank away from the inlet, and the oil receiving tank and the oil collection tank are connected through an oil drain hole; the oil-scooping mechanism is used to scoop up the grease on the surface of the sewage and transport the grease to the oil receiving tank.

[0012] In a preferred embodiment of the present invention, the oil scooping mechanism includes a lead screw, which is mounted between the two ends of the second water tank via bearings, and the lead screw is located above the oil receiving tank; a bracket is mounted on the slide of the lead screw, and an electric push rod is mounted on the bracket; an oil scooping structure is mounted on the piston rod end of the electric push rod, and the electric push rod is used to drive the oil scooping structure to move vertically, thereby realizing the action of scooping and unloading oil.

[0013] In a preferred embodiment of the present invention, the oil-scooping structure includes an oil-scooping trough, a support frame, a spring, and a pressure member; the bottom of the oil-scooping trough is provided with an oil outlet extending along its length; the support frame includes a frame bar, with pads fixedly provided on the bottom surfaces of both ends of the frame bar, and the pads are connected to the oil-scooping trough by bolts, so that there is a movable gap between the frame bar and the bottom surface of the oil-scooping trough; a column is fixedly provided on the top surface of the frame bar corresponding to the electric push rod, and the column is connected to the piston rod end of the electric push rod by a coupling; at least two first guide rods are fixedly provided on the top surface of the frame bar, and a first guide hole is provided on the bracket corresponding to the first guide rod, and the support frame passes through the first guide rod... The guide rod moves along the first guide hole; a second guide hole is provided at the first guide rod, penetrating the bottom surface of the frame bar; the pressure member includes a pressure plate, and a second guide rod is fixedly provided on the top surface of the pressure plate corresponding to the second guide hole. The second guide rod is inserted into the second guide hole, and a spring is provided in the second guide hole to provide the pressure member with a downward pushing force, so that the pressure plate seals the lower oil port; multiple protrusions for pushing the pressure member are fixedly provided inside the oil receiving groove. The protrusions are evenly spaced along the length of the oil receiving groove. The electric push rod drives the oil scooping structure to move downward, so that the protrusions can penetrate the lower oil port and push the pressure member to release the blockage.

[0014] In a preferred embodiment of the present invention, the bottom of the oil receiving groove is inclined downward toward the oil drain hole, and the lower end of the inclination is connected to the bottom end of the oil drain hole; the top surfaces of the protruding pillars are of the same height, and the tops of the pillars are all arc-shaped protrusions.

[0015] The beneficial effects of this invention are as follows:

[0016] The present invention provides a slaughterhouse wastewater treatment device, comprising a filtration device, an oil removal device, and an integrated treatment device arranged sequentially along the wastewater flow direction; the filtration device is used to perform at least two stages of filtration on the wastewater, providing double filtration treatment for the slaughterhouse wastewater, effectively filtering and separating impurities, reducing the amount of impurities entering downstream equipment; and cleaning the filtration components to maintain high-efficiency filtration effect and quality.

[0017] The oil removal device is used to separate the upper layer of oil from wastewater; it performs separate treatment on the oil, improves the separation quality, effectively reduces the amount of oil entering the downstream treatment process, and prevents blockage or damage to subsequent equipment.

[0018] The integrated treatment unit is used to perform biochemical treatment on wastewater after slag and oil removal, and to carry out in-depth purification treatment to ensure that the wastewater meets the discharge standards after treatment. Attached Figure Description

[0019] Figure 1 This is a first-view perspective three-dimensional structural diagram of a slaughterhouse wastewater treatment device provided in a specific embodiment of the present invention;

[0020] Figure 2 This is a second-view perspective three-dimensional structural diagram of a slaughterhouse wastewater treatment device provided in a specific embodiment of the present invention;

[0021] Figure 3 This is a first-view perspective three-dimensional structural diagram of the filtering device provided in a specific embodiment of the present invention;

[0022] Figure 4 This is a second-view perspective three-dimensional structural diagram of the filtering device provided in a specific embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of the filtering device provided in a specific embodiment of the present invention;

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the support roller provided in a specific embodiment of the present invention;

[0025] Figure 7 This is a first-view perspective three-dimensional structural diagram of the oil removal device provided in a specific embodiment of the present invention;

[0026] Figure 8 This is a second-view perspective three-dimensional structural diagram of the oil removal device provided in a specific embodiment of the present invention;

[0027] Figure 9 This is a first-view unfolded structural diagram of a portion of the oil-scouring mechanism provided in a specific embodiment of the present invention.

[0028] Figure 10This is a second-view unfolded structural diagram of a portion of the oil-scooping mechanism provided in a specific embodiment of the present invention.

[0029] In the picture:

[0030] 100. Integrated processing unit;

[0031] 200. Filter device; 211. First conveyor belt; 212. Second conveyor belt; 213. Straight section; 220. Electric heating tube; 230. First water tank; 231. First purification zone; 232. Second purification zone; 233. Water inlet zone; 240. Cleaning structure; 241. First brush roller; 242. Second brush roller; 250. Slag discharge structure; 251. Material trough; 252. Spiral shaft; 260. Outer cover; 270. Support roller; 271. Roller; 272. Gear; 273. Tube; 274. Strip-shaped opening; 281. First return pipe; 282. Second return pipe;

[0032] 300. Oil removal device; 310. Second water tank; 311. Oil collection tank; 312. Oil receiving tank; 313. Oil drain hole; 314. Protruding column; 320. Oil scooping mechanism; 321. Lead screw; 322. Bracket; 323. Electric push rod; 324. First guide hole; 400. Oil scooping structure; 410. Oil scooping tank; 411. Oil outlet; 420. Support frame; 421. Frame bar; 422. Pad; 423. First guide rod; 424. Second guide hole; 430. Spring; 440. Pressing element; 441. Pressure plate; 442. Second guide rod. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 , Figure 2 As shown in the figure, a specific embodiment of the present invention discloses a slaughterhouse wastewater treatment device, including a filtration device 200, an oil removal device 300, and an integrated treatment device 100 arranged sequentially along the wastewater flow direction; the filtration device 200 is used to perform at least two stages of filtration on the wastewater to remove particulate impurities from the wastewater and can clean the filtration components; the oil removal device 300 is used to separate the upper layer of grease from the wastewater; the integrated treatment device 100 is used to perform biochemical treatment on the wastewater after slag and oil removal.

[0035] The above-mentioned slaughterhouse wastewater treatment equipment includes a filtration device for at least two stages of filtration, providing dual filtration treatment for the slaughterhouse wastewater, effectively filtering and separating impurities, reducing the amount of impurities entering downstream equipment, and cleaning the filter components to maintain high-efficiency filtration effect and quality.

[0036] The oil removal device is used to separate the upper layer of oil from wastewater; it performs separate treatment on the oil, improves the separation quality, effectively reduces the amount of oil entering the downstream treatment process, and prevents blockage or damage to subsequent equipment.

[0037] The integrated treatment unit is used for biochemical treatment of wastewater after slag and oil removal, performing deep purification to ensure that the treated wastewater meets discharge standards. The integrated treatment unit includes an anaerobic tank, an aerobic tank, a sedimentation tank, an MBR membrane tank, and a disinfection tank, performing multiple purification treatments on the wastewater to meet the requirements for discharge. It should be noted that this is a relatively common wastewater treatment equipment that can be purchased and used on the market, and details will not be elaborated further.

[0038] Furthermore, such as Figures 3 to 5 As shown, the filtration device 200 includes a first water tank 230, in which a first conveyor belt 211 and a second conveyor belt 212 are installed. The first conveyor belt is located on the side of the second conveyor belt away from the oil removal device, and the mesh size of the second conveyor belt is smaller than that of the first conveyor belt. Larger impurities are filtered by the first conveyor belt, and smaller impurities are filtered by the second conveyor belt, thus achieving graded treatment and improving filtration speed and quality.

[0039] The interior of the first water tank 230 is divided into an inlet area 233, a first purification area 231 and a second purification area 232 by the first conveyor belt 211 and the second conveyor belt 212. The side wall of the second purification area is provided with a first drain outlet for draining water to the oil removal device. The first conveyor belt 211 and the second conveyor belt 212 are both inclined and their tops are bent toward one side of the oil removal device to form a straight section 213.

[0040] The first and second conveyor belts serve as partitions within the first water tank, dividing it into sections. Wastewater undergoes filtration as it passes through the conveyor belts, while filter residue is conveyed along the conveyor belts to the straight section for separation. A cleaning structure 240 and a slag discharge structure 250 are located below the straight section 213. The cleaning structure washes and cleans the surface of the conveyor belt, while the slag discharge structure catches falling impurities and removes them to the outside. The cleaning structure actively cleans the conveyor belt, preventing filter residue from clogging the mesh and maintaining effective filtration. The slag discharge structure also discharges the separated filter residue to the outside for timely treatment, preventing accumulation.

[0041] Furthermore, such as Figure 5As shown, the cleaning structure 240 includes a first brush roller 241 and a second brush roller 242. The first and second brush rollers are rotatably mounted between the two walls of the first water tank via bearings. The first brush roller 241 is located on the side of the second brush roller 242 closer to the oil removal device 300. The end shafts of the first and second brush rollers are connected to the output shaft of the first motor via a sprocket and chain assembly. The first motor drives multiple brush rollers to rotate, reducing the number of motors used and lowering equipment and operating costs.

[0042] The outer wall of the first brush roller is fixedly provided with multiple first brush bristle strips extending along the length direction, and the multiple first brush bristle strips are distributed in a circumferential array around the axis of the first brush roller; the outer wall of the second brush roller is fixedly provided with second brush bristle strips, and the second brush bristle strips are spirally wrapped around the outer wall of the second brush roller; the bristles at the top of the first brush roller and the second brush roller extend to abut against the surface of the conveyor belt; the first brush roller provides a roller cleaning action against the direction of movement of the conveyor belt, realizing the first stage of cleaning action; the second brush roller provides a roller cleaning action with lateral force on the conveyor belt, and the different orientations can further enhance the overall cleaning effect and prevent impurities from clogging the conveyor belt.

[0043] Furthermore, at least one electric heating tube 220 is installed in the straight section of the second conveyor belt 212 to dry the belt in the straight section. The second conveyor belt mainly filters out finer impurities, which tend to adhere more tightly to the surface of the conveyor belt, especially when wet, where their adhesion is stronger and affects the cleaning by the roller brush. The added electric heating tube can heat the straight section, causing the conveyor belt and impurities in this area to dry, making it easier for the impurities to fall off quickly during subsequent roller brush cleaning and improving the cleaning quality.

[0044] Furthermore, the slag discharge structure 250 includes a trough 251 and a spiral shaft 252; the trough 251 is installed between the two side walls of the first water tank 230, located below the straight section 213; the side of the trough near the oil removal device extends upward to a height above the top surface of the straight section, and the side of the trough away from the oil removal device extends upward to abut against the surface of the conveyor belt, with the corresponding first brush roller 241 and second brush roller 242 located inside the trough 251; providing a larger receiving range to effectively receive falling impurities;

[0045] The bottom of the trough has a concave arc shape to allow the filter residue to collect at the bottom; for example... Figure 3As shown, the wall of the first water tank 230 is provided with a slag discharge port corresponding to the recessed part of the material tank 251. An extension cover 260 is installed on the outside of the slag discharge port, and a material discharge port is provided at the bottom of the extension cover. By setting the extension cover, the installation conditions are provided for one end of the spiral shaft to extend out of the outside of the first water tank, ensuring that the filter residue can be carried out of the outside of the first water tank. The spiral shaft 252 is rotatably mounted between the extension cover 260 and the wall of the first water tank 230. The spiral shafts of both spiral shafts are driven by the second motor, which also reduces the number of second motors used, reduces equipment cost and operating cost. The rotating spiral shaft is used to send the filter residue collected at the bottom of the material tank to the outside.

[0046] Furthermore, such as Figure 5 , Figure 6 As shown, the inclined bottom ends of the first conveyor belt 211 and the second conveyor belt 212 are rotatably supported by a support roller 270. The support roller 270 includes a roller 271, with gears 272 fixed at both ends. A tube 273 is fixed to the outer wall of the gear 272, and the tube, the inner ring of the gear, and the roller are connected. The outer wall of the roller 271 has multiple strip-shaped openings 274 penetrating the inner wall, and the multiple strip-shaped openings are arranged in a circumferential array around the axis of the roller. The tubes at both ends are rotatably mounted on the wall of the first water tank through bearings, and the tubes extend outward through the wall of the first water tank and are connected to the return pipe. The gears mesh with the toothed ring of the conveyor belt for transmission. The first water tank... The tank wall is provided with two sets of return ports corresponding to the two sets of return pipes. The end of the return pipe away from the pipe is connected to the return port. The support roller 270 of the first conveyor belt 211 is connected to the first purification zone through the first return pipe 281, and the support roller 270 of the second conveyor belt 212 is connected to the second purification zone 232 through the second return pipe 282. The conveyor belt is a filter component. During the filtration process, it is blocked by the two belt surfaces, and some impurities will remain between the two belt surfaces of the conveyor belt. The above design can provide conditions for these impurities to flow back to the purification zone more easily, and can prevent impurities from remaining and accumulating between the belt surfaces of the conveyor belt, avoiding more serious blockage.

[0047] Furthermore, such as Figure 7 , Figure 8As shown, the oil removal device 300 includes a second water tank 310 and an oil-scooping mechanism 320 installed on the top of the second water tank. A drain pipe is installed at the bottom of the side wall of the second water tank, and the drain pipe is connected to the water inlet of the pump body. The pump body pumps the sewage inside the second water tank to the integrated treatment device. The side wall of the second water tank near the filter device has a water inlet connected to the first drain outlet. An oil collection tank 311 is fixedly installed on the outer wall of the second water tank 310, and a discharge pipe is connected to the bottom of the oil collection tank. A switch valve is installed on the discharge pipe. An oil receiving tank 312 is fixedly installed on the inner wall of the second water tank 310 away from the water inlet. The oil receiving tank 312 is connected to the oil collection tank 311 through an oil discharge hole 313. The oil-scooping mechanism is used to scoop up the grease on the top of the sewage and transport the grease to the oil receiving tank. The grease then flows to the oil collection tank for unified collection and treatment. The discharge pipe can also be connected to an external oil-water separation device through a pipeline to achieve deep cleaning and further separate the grease from the sewage for convenient classification and treatment.

[0048] Furthermore, the oil scooping mechanism 320 includes a lead screw 321, which is mounted between the two ends of the second water tank via bearings, and is located above the oil receiving tank. A bracket 322 is installed on the slide of the lead screw 321, and an electric push rod 323 is installed on the bracket 322. An oil scooping structure 400 is installed at the piston rod end of the electric push rod 323. The electric push rod is used to drive the oil scooping structure to move vertically, thereby realizing the action of scooping and unloading oil. The design and coordination of the overall structure can enable the oil scooping structure to cover the entire area of ​​the second water tank as much as possible, and can perform a more comprehensive oil scooping action. This can overcome the problems of small coverage and low efficiency of floating oil-water separators, and effectively improve the overall processing efficiency.

[0049] Furthermore, a cover plate is installed on top of the second water tank to shield it and protect the moving oil-retrieving mechanism. An ultrasonic sensor for detecting oil-water separation is also installed on the cover plate. This non-intrusive top-mounted sensor monitors the wastewater below and detects the interface by measuring the difference in the propagation speed of ultrasonic waves in oil and water and the changes in echo time and intensity. This allows the electric push rod to adjust the depth of the oil-retrieving mechanism, enabling more accurate oil retrieval and reducing the amount of wastewater to be retrieved.

[0050] Furthermore, the two ends of the bracket are supported on the top of the two side walls of the second water tank. The two ends of the bracket are bent downward and have flanges. Guide bolts are installed at the flanges. The two walls of the second water tank have guide openings extending along the length direction corresponding to the guide bolts. The movement of the bracket is further limited by the cooperation between the guide bolts and the guide openings. The cooperation between the guide bolts and the guide openings, as well as the cooperation between the bracket and the second water tank, can also play a role in force distribution, reducing the stress on the screw, and allowing the oil scooping structure to move smoothly and straight with the slide.

[0051] Furthermore, such as Figure 9 , Figure 10 As shown, the oil scooping structure 400 includes an oil scooping tank 410, a support frame 420, a spring 430, and a pressure member 440. The bottom of the oil scooping tank 410 is provided with an oil outlet 411 extending along the length direction. The support frame 420 includes a frame bar 421, and pads 422 are fixedly provided on the bottom surfaces of both ends of the frame bar 421. The pads 422 are connected to the oil scooping tank 410 by bolts, so that there is a movable gap between the frame bar and the bottom surface of the oil scooping tank. A column is fixedly provided on the top surface of the frame bar corresponding to the electric push rod. The column and the piston rod end of the electric push rod are connected by a coupling; at least two first guide rods 423 are fixedly provided on the top surface of the frame bar 421, and a first guide hole 324 is provided on the bracket 322 corresponding to the first guide rod 423, and the support frame moves along the first guide hole via the first guide rod; a second guide hole 424 penetrating the bottom surface of the frame bar is provided at the first guide rod 423; the pressure member 440 includes a pressure plate 441, and a first guide hole 424 is fixedly provided on the top surface of the pressure plate 441 corresponding to the second guide hole 424. Two guide rods 442 are inserted into the second guide hole 424, and a spring 430 is located inside the second guide hole 424 to provide a downward pushing force for the pressure member, so that the pressure plate 441 blocks the lower oil port 411. The inside of the oil receiving groove 312 is fixedly provided with multiple protrusions 314 for pushing the pressure member. The protrusions are evenly spaced along the length of the oil receiving groove. The electric push rod drives the oil scooping structure to move downward, so that the protrusions can pass through the lower oil port and push the pressure member to release the blockage. This structural design allows the bottom of the oil scooping groove to be in a blocked state when scooping oil, so that it can hold the scooped grease. When the oil scooping structure moves to the oil receiving groove and moves under the drive of the electric push rod to push the pressure plate with the protrusions, the bottom of the oil scooping groove is in an open state, and the scooped grease is discharged to the oil receiving groove and then flows to the oil collection groove. The overall operation is simple and convenient, and can achieve effective oil-water separation, improve the efficiency and quality of separation, and thus improve the overall work efficiency.

[0052] Furthermore, the bottom of the oil receiving trough is inclined downwards towards the oil drain hole, with the lower end of the inclination connecting to the bottom of the oil drain hole; the top surfaces of the protruding pillars are all at the same height, and the tops are all arc-shaped protrusions; the structural design allows the protruding pillars to easily penetrate into the lower oil port and push the pressure plate, thereby removing the blockage of the lower oil port and completing the discharge of grease; and the grease flows along the inclined surface of the bottom of the oil receiving trough towards the oil drain hole, allowing it to be smoothly transferred to the oil collection trough.

[0053] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A slaughterhouse wastewater treatment device, characterized in that: It includes a filtration device, an oil removal device, and an integrated treatment device arranged sequentially along the sewage flow direction; The filtration device is used to filter wastewater in at least two stages to remove particulate impurities from the wastewater and to clean the filter components; Oil removal devices are used to separate the upper layer of grease from wastewater; The integrated treatment unit is used for the biochemical treatment of wastewater after slag and oil removal; The filtration device includes a first water tank, in which a first conveyor belt and a second conveyor belt are installed; The first conveyor belt is located on the side of the second conveyor belt away from the oil removal device, and the mesh size of the second conveyor belt is smaller than that of the first conveyor belt. The interior of the first water tank is divided into an inlet area, a first purification area and a second purification area by the first and second conveyor belts. The side wall of the second purification area is provided with a first drain outlet for draining water to the oil removal device. Both the first and second conveyor belts are inclined, and their tops are bent toward the side of the oil removal device to form a straight section. Below the straight section are a cleaning structure and a slag discharge structure. The cleaning structure is used to brush and clean the surface of the conveyor belt, and the slag discharge structure is used to catch the falling impurities and send them to the outside. The interior of the inclined bottom ends of the first and second conveyor belts is supported by rotating support rollers; The support roller includes a roller, with gears fixed at both ends of the roller, and a tube fixed on the outer wall of the gear. The tube, the inner ring of the gear, and the roller are connected. The outer wall of the roller is provided with multiple strip-shaped openings that penetrate the inner wall, and the multiple strip-shaped openings are arranged in a circumferential array around the axis of the roller; The two ends of the pipe are rotatably mounted on the wall of the first water tank through bearings. The pipe extends outward through the wall of the first water tank and is connected to the return pipe. The gear meshes with the toothed ring of the conveyor belt for transmission. The first water tank wall is provided with two sets of return ports corresponding to the two sets of return pipes, and the end of the return pipe away from the pipe strip is connected to the return port; The support rollers of the first conveyor belt are connected to the first purification zone through the first return pipe, and the support rollers of the second conveyor belt are connected to the second purification zone through the second return pipe.

2. The slaughterhouse wastewater treatment equipment according to claim 1, characterized in that: The cleaning structure includes a first brush roller and a second brush roller. The first brush roller and the second brush roller are rotatably mounted between the two walls of the first water tank via bearings. The first brush roller is located on the side of the second brush roller that is closer to the oil removal device. The outer wall of the first brush roller is fixedly provided with multiple first brush bristle strips extending along the length direction, and the multiple first brush bristle strips are arranged in a circumferential array around the axis of the first brush roller; the outer wall of the second brush roller is fixedly provided with second brush bristle strips, and the second brush bristle strips are spirally wrapped around the outer wall of the second brush roller; the bristles at the top of the first brush roller and the second brush roller extend to abut against the surface of the conveyor belt. Both cleaning structures are driven by the first motor.

3. The slaughterhouse wastewater treatment equipment according to claim 2, characterized in that: At least one electric heating tube is installed in the straight section of the second conveyor belt for drying the belt in the straight section.

4. The slaughterhouse wastewater treatment equipment according to claim 1, characterized in that: The slag discharge structure includes a trough and a screw shaft; The feed trough is installed between the two side walls of the first water tank, located below the straight section; The side of the trough closest to the oil removal device extends upward to a height above the top surface of the straight section, and the side of the trough furthest from the oil removal device extends upward to abut against the surface of the conveyor belt. The corresponding first brush roller and second brush roller are located inside the trough. The bottom of the trough is a concave arc shape. The wall of the first water tank is provided with a slag discharge port corresponding to the concave part of the trough. An extension cover is installed on the outside of the slag discharge port, and a material discharge port is provided at the bottom of the extension cover. The spiral shaft is mounted between the outer cover and the wall of the first water tank. Both spiral shafts are driven by the second motor. The rotating spiral shaft is used to send the filter residue collected at the bottom of the material tank to the outside.

5. The slaughterhouse wastewater treatment equipment according to claim 1, characterized in that: The oil removal device includes a second water tank and an oil scooping mechanism installed on top of the second water tank; The second water tank has an inlet on its side wall near the filter device that is connected to the first drain outlet; an oil collection tank is fixedly provided on the outer wall of the second water tank, and a discharge pipe is connected to the bottom of the oil collection tank, with a switch valve on the discharge pipe; an oil receiving tank is fixedly provided on the inner wall of the second water tank away from the inlet, and the oil receiving tank is connected to the oil collection tank through an oil drain hole. The oil scooping mechanism is used to scoop up the grease from the top of the sewage and transport it to the oil receiving tank.

6. The slaughterhouse wastewater treatment equipment according to claim 5, characterized in that: The oil scooping mechanism includes a lead screw, which is mounted between the two ends of the second water tank via bearings, and the lead screw is located above the oil receiving tank. A bracket is installed on the slide of the lead screw, and an electric push rod is installed on the bracket. An oil-scooping structure is installed at the piston rod end of the electric push rod. The electric push rod is used to drive the oil-scooping structure to move vertically, so as to realize the action of scooping up and unloading oil.

7. A slaughterhouse wastewater treatment device according to claim 6, characterized in that: The oil scooping structure includes an oil scooping tank, a support frame, springs, and pressure components; The bottom of the oil trough is provided with an oil outlet that extends along the length direction; The support frame includes frame bars, and pads are fixedly provided on the bottom surfaces of both ends of the frame bars. The pads are connected to the oil trough by bolts, so that there is a movable gap between the frame bars and the bottom surface of the oil trough. The top surface of the frame bar is fixedly provided with a column corresponding to the electric push rod, and the column is connected to the piston rod end of the electric push rod through a coupling; at least two first guide rods are fixedly provided on the top surface of the frame bar, and the bracket is provided with a first guide hole corresponding to the first guide rod, and the support frame moves along the first guide hole through the first guide rod; A second guide hole is provided at the first guide rod, penetrating the bottom surface of the frame bar; The pressure component includes a pressure plate. A second guide rod is fixedly provided on the top surface of the pressure plate corresponding to the second guide hole. The second guide rod is inserted into the second guide hole, and a spring is provided in the second guide hole to provide the pressure component with a downward pushing force, so that the pressure plate seals the lower oil port. The inside of the oil receiving groove is fixed with multiple protrusions for pushing the pressing parts. The protrusions are evenly spaced along the length of the oil receiving groove. The electric push rod drives the oil scooping structure to move down, so that the protrusions can pass through the lower oil port and push the pressing parts to release the blockage.

8. A slaughterhouse wastewater treatment device according to claim 7, characterized in that: The bottom of the oil receiving trough is inclined downwards towards the oil drain hole, and the lower end of the inclination is connected to the bottom end of the oil drain hole. The top surfaces of the protruding pillars are all at the same height, and the tops of all of them are arc-shaped protrusions.

Images