Sewage multi-stage treatment equipment for environmental protection engineering

Abstract

The invention discloses sewage multi-stage treatment equipment for environmental protection engineering, and belongs to the technical field of sewage treatment. The main body mechanism is provided with two precipitation mechanisms for separating sediments in sewage, a floating mechanism for separating floating objects in the sewage and a treatment mechanism for performing aerobic and anaerobic treatment on the sewage; after sewage is introduced into the main body mechanism, sludge and other precipitates in the sewage are separated in the primary precipitation mechanism, floating impurities in the sewage are separated in the floating mechanism, in the anaerobic tank, denitrification nitrogen removal, hydrolytic acidification and phosphorus release treatment are performed on the sewage through anaerobic bacteria, and in the aerobic tank, the sludge in the sewage is separated from the sludge in the primary precipitation mechanism. Sewage is subjected to COD degradation, nitrification and phosphorus uptake treatment through aerobic bacteria, then precipitates in the sewage are separated again in the secondary precipitation mechanism, and the treatment effect is good.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a multi-stage wastewater treatment device for environmental engineering. Background Technology

[0002] With increasingly stringent environmental protection requirements and a continuous increase in wastewater discharge from industrial and agricultural production and daily life, efficient and comprehensive wastewater treatment has become one of the core tasks in the field of environmental engineering. Traditional wastewater treatment processes typically include multiple stages such as physical sedimentation and biological treatment. However, these stages are often scattered across different treatment units or structures, resulting in long process flows, large land areas, and a certain degree of inflexibility in the connection and coordinated control between the various units.

[0003] Specifically, in the physical treatment stage, wastewater typically contains both sediments (such as silt and inorganic particles) and floating matter (such as grease and light suspended solids). In existing technologies, sedimentation treatment largely relies on gravity settling tanks, whose treatment efficiency is significantly affected by retention time and water flow conditions. Furthermore, sludge removal from sedimentation tanks often depends on timing or experience, resulting in low levels of automation and a tendency for untimely sludge removal to reduce treatment effectiveness, or excessive sludge removal to waste resources and cause hydraulic shock. For the removal of floating matter, oil separators or air flotation devices are commonly used. The former has limited separation efficiency, while the latter requires additional power equipment, leading to higher energy consumption.

[0004] In the biological treatment stage, aerobic and anaerobic treatment are key to removing pollutants such as organic matter, nitrogen, and phosphorus from wastewater. Currently, the common practice is to set up aerobic and anaerobic tanks separately and connect them through pipelines and pump stations. This system is complex and occupies a large area. In addition, the packing material or baskets used to support the microbial community are mostly fixed installations. When it is necessary to check the activity of the microbial community, replace or replenish the microbial species, the operation is cumbersome and often requires stopping part or even the entire treatment process, affecting the continuous operation and treatment capacity of the system. The aeration system is usually fixed at the bottom of the aerobic reactor, and insufficient consideration is given to the uniform aeration of the baskets and the convenience of microbial community renewal and maintenance. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention discloses a more efficient and flexible multi-stage wastewater treatment device capable of comprehensively treating sediments, floating matter, and organic matter in wastewater. The technical solution adopted by this invention is as follows: a multi-stage wastewater treatment device for environmental engineering, comprising a main body for conveying wastewater, the main body including an outer cylinder, and equipped with two sedimentation mechanisms for separating sediments in the wastewater, one floating mechanism for separating floating matter in the wastewater, and one treatment mechanism for aerobic and anaerobic treatment of the wastewater. The sedimentation mechanism includes a transparent sedimentation tube, the floating mechanism includes a defloting tube with a notch at the top, and the treatment mechanism includes an aerobic tank and an anaerobic tank. The sedimentation transparent tube is provided with a lower water inlet and an upper water outlet, the float removal tube is provided with a water inlet and a water outlet, the aerobic tank is provided with an aerobic water inlet and an aerobic water outlet, and the anaerobic tank is provided with an anaerobic water inlet pipe and an anaerobic water outlet pipe. The two sedimentation mechanisms are a primary sedimentation mechanism and a secondary sedimentation mechanism. A water inlet pipe is fixedly installed on the lower water inlet of the primary sedimentation mechanism, and a water outlet pipe is fixedly installed on the upper water outlet of the secondary sedimentation mechanism.

[0006] Furthermore, the main structure includes an upper fixed plate fixedly installed on the outer cylinder, a flotation pipe, an aerobic tank, an anaerobic tank, and two sedimentation transparent pipes fixedly installed on the upper fixed plate. A desettling connecting pipe is connected to the upper outlet of the primary sedimentation mechanism, and the other end of the desettling connecting pipe is connected to the inlet. A flotation connecting pipe is connected to the outlet, and the other end of the flotation connecting pipe is connected to the anaerobic inlet pipe. A bacteria connecting pipe is connected to the anaerobic outlet, and the other end of the bacteria connecting pipe is connected to the aerobic inlet. A rear connecting pipe is connected to the aerobic outlet, and the other end of the rear connecting pipe is connected to the lower inlet of the secondary sedimentation mechanism.

[0007] Furthermore, a water inlet tank is fixedly installed inside the outer cylinder, a water inlet pipe is fixedly installed on the water inlet tank, and a water pump is fixedly installed on the water inlet tank. The water pump is connected to the water supply pipe. The inner surface of the water inlet tank is a slope, and a scum slope is provided on the outer cylinder. The scum slope is located next to the top notch of the scum removal pipe.

[0008] Furthermore, a slag collection box is fixedly installed on the water inlet tank, a slag discharge slope is fixedly installed on the slag collection box, several holes are provided at the bottom of the slag collection box, a motor frame is fixedly installed on the slag collection box, a slag-dispensing motor is fixedly installed on the motor frame, a rotating frame is fixedly installed on the motor shaft of the slag-dispensing motor, and multiple paddles are fixedly installed on the rotating frame, with the paddles fitting against the slag collection box.

[0009] Wastewater enters the inlet pipe and flows into the inlet tank. The water pump starts, drawing the wastewater from the inlet tank through the water supply pipe into the transparent sedimentation tube of the primary sedimentation unit. In the primary sedimentation unit, sludge and other sediments in the wastewater are separated. Then, the wastewater enters the deflocculation tube through the desettling connection pipe to separate floating impurities. Subsequently, the wastewater enters the anaerobic tank through the deflocculation connection pipe, where anaerobic bacteria perform denitrification, hydrolysis acidification, and phosphorus release treatment. Then, the wastewater enters the aerobic tank through the bacteria connection pipe, where aerobic bacteria perform COD degradation, nitrification, and phosphorus uptake treatment. Finally, the wastewater enters the transparent sedimentation tube of the secondary sedimentation unit through the post-connection pipe, where sediments are separated again. Finally, the wastewater is discharged through the outlet pipe.

[0010] Furthermore, the sedimentation mechanism includes a sensor frame fixedly installed on the transparent sedimentation tube, two optical sensors are installed on the sensor frame, a lifting column is slidably installed inside the transparent sedimentation tube, an upper frame is fixedly installed on the transparent sedimentation tube, a lifting spring is provided between the lifting column and the upper frame, an upper sealing plate, a lower sealing plate and a bottom sealing plate are fixedly installed on the lifting column, a through hole is provided at the bottom of the transparent sedimentation tube, and a ventilation groove is provided on the lifting column. Under normal conditions, the bottom sealing plate seals the through hole at the bottom of the transparent sedimentation tube, a slag-blocking slope is fixedly installed inside the transparent sedimentation tube, and the lifting column and the slag-blocking slope are slidably installed.

[0011] Furthermore, a lifting electric cylinder is fixedly installed on the upper frame, a lifting ramp is fixedly installed on the output end of the lifting electric cylinder, a horizontal column is fixedly installed on the lifting ramp, the horizontal column is slidably installed with the upper frame, and a top wheel is rotatably installed on the lifting column, the top wheel cooperating with the lifting ramp.

[0012] After wastewater enters the sedimentation tube through the lower inlet, sediment settles at the bottom, while the clear liquid is discharged through the upper outlet. A retaining slope blocks sediment. When the optical sensor detects that the sediment level in the sedimentation tube has reached the sensor's position, the electric cylinder extends, lifting the top wheel and lifting column via the lifting ramp. The lifting spring is compressed, causing the upper sealing plate to close the upper outlet and the lower sealing plate to close the lower inlet, stopping water inflow and outflow. Simultaneously, the bottom sealing plate rises, opening the bottom through-hole of the sedimentation tube, allowing sediment and some wastewater to pass through. The sediment is discharged into the slag collection box, where it sits. Wastewater enters the inlet tank through the through-hole of the slag collection box and is treated again along with subsequent wastewater. The slag-discharging motor drives the rotating frame and the discharging blade to rotate, and the discharging blade pushes the sediment on the slag collection box out of the slag discharge slope. When the lifting column rises, the ventilation groove connects the inner cavity of the sedimentation transparent tube with the external gas. After all the sediment is discharged, the lifting cylinder retracts, the spring rebounds, and the lifting column descends. The bottom sealing plate closes the bottom through-hole of the sedimentation transparent tube again, the upper sealing plate opens the upper water outlet, and the lower sealing plate opens the lower water inlet.

[0013] Furthermore, the floating mechanism includes a top electric cylinder fixedly installed on the top of the float tube, a beveled hole plate fixedly installed on the output end of the top electric cylinder, the beveled hole plate having several holes, a side hole plate and a side sealing plate fixedly installed on the beveled hole plate, the side hole plate having several holes.

[0014] After the sewage enters the defloat pipe through the inlet, it sinks to the bottom of the defloat pipe, while the floating debris is blocked by the sloping hole plate. As the sewage level rises, the sewage enters the outlet through the holes in the side orifice plate, where the floating debris is blocked again. At regular intervals, the top electric cylinder retracts, causing the sloping hole plate, side orifice plate, and side sealing plate to rise. The side orifice plate closes the inlet, and the outlet is offset from the holes in the side orifice plate. The rising of the sloping hole plate causes the floating debris to rise as well, and the floating debris leaves the device through the scum slope. Then, the top electric cylinder extends, causing the sloping hole plate, side orifice plate, and side sealing plate to reset, and the inlet reopens.

[0015] Furthermore, the processing mechanism includes a left electric cylinder fixedly installed on the upper fixed plate, a left lifting plate fixedly installed on the output end of the left electric cylinder, a left inner column fixedly installed on the left lifting plate, four aerobic bacteria baskets set on the left inner column, aerobic bacteria placed in the aerobic bacteria baskets, an air pipe fixedly installed on the aerobic tank, the air pipe being connected to an external air machine, and an air outlet fixedly installed on the air pipe.

[0016] Furthermore, a right electric cylinder is fixedly installed on the upper fixed plate, a right lifting plate is fixedly installed on the output end of the right electric cylinder, a right inner column is fixedly installed on the right lifting plate, and four anaerobic bacteria baskets are set on the right inner column, with anaerobic bacteria placed in the anaerobic bacteria baskets.

[0017] Wastewater enters the anaerobic tank through the anaerobic inlet pipe, where it undergoes anaerobic treatment by anaerobic bacteria in the anaerobic bacteria basket. Subsequently, the wastewater enters the aerobic tank through the bacteria connection pipe and the aerobic inlet, where it undergoes aerobic treatment by aerobic bacteria in the aerobic bacteria basket. An air blower aerates the wastewater in the aerobic tank through the air pipe and the air outlet, providing oxygen for the aerobic bacteria. Finally, the wastewater enters the secondary sedimentation unit through the aerobic outlet.

[0018] The extension of the left and right electric cylinders can respectively drive the left and right inner columns to rise, thereby lifting the aerobic and anaerobic bacterial baskets away from the aerobic and anaerobic tanks, making it easier to observe and handle the bacterial community.

[0019] The beneficial effects of this invention compared with the prior art are: (1) By highly integrating multiple core treatment units such as primary sedimentation, secondary sedimentation, floating matter removal, anaerobic and aerobic treatment into a main frame and optimizing its hydraulic connection path, the sewage can achieve continuous, closed and orderly flow between each treatment unit, reducing the intermediate lifting and pipeline transportation links required in the traditional split process, and reducing the equipment footprint and system complexity; (2) The sedimentation mechanism and the floating mechanism set in this invention are both designed with automated cleaning devices, which improves the self-maintenance capability and operational stability of the equipment. For sediment, the height of sludge in the transparent sedimentation tube is monitored in real time by setting an optical sensor, and the lifting cylinder and the lifting column mechanism are linked to achieve timed or on-demand automatic discharge of sediment. During the discharge process, the upper and lower sealing plates are connected to the automatic discharge of sediment. The system can automatically cut off the inlet and outlet water paths when discharging slag, ensuring that the process is not interrupted. For floating objects, the top electric cylinder periodically drives the slope hole plate and side hole plate to lift and lower, automatically lifting the accumulated floating objects and discharging them through the slag slope. This effectively avoids the problems of reduced treatment effect and blockage caused by untimely manual cleaning in traditional equipment, ensuring that the entire system can operate efficiently, continuously, stably and stably for a long time. (3) The present invention can drive the left inner column and the right inner column to lift as a whole through independent left and right electric cylinders, so that the bacteria basket can be completely removed from the tank. This makes the maintenance operations such as observation, sampling, replenishment, replacement or cleaning of bacteria extremely convenient. There is no need to enter the tank or empty the sewage, which reduces the maintenance difficulty and operation risk. At the same time, the aeration system of the aerobic tank is set independently and is not affected when the bacteria basket is lifted and lowered, which enhances the flexibility and adaptability of the system operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention (internal).

[0022] Figure 3 This is a schematic diagram of the main structure of the present invention. Figure 1 .

[0023] Figure 4 This is a schematic diagram of the main structure of the present invention. Figure 2 .

[0024] Figure 5 This is a schematic diagram of the main structure of the present invention. Figure 3 .

[0025] Figure 6 This is a schematic diagram of the main structure of the present invention. Figure 4 .

[0026] Figure 7 This is a schematic diagram of the sedimentation mechanism of the present invention. Figure 1 .

[0027] Figure 8 This is a schematic diagram of the sedimentation mechanism of the present invention. Figure 2 .

[0028] Figure 9 This is a schematic diagram of the floating mechanism structure of the present invention. Figure 1 .

[0029] Figure 10 This is a schematic diagram of the floating mechanism structure of the present invention. Figure 2 .

[0030] Figure 11 This is a schematic diagram of the processing mechanism structure of the present invention. Figure 1 .

[0031] Figure 12 This is a schematic diagram of the processing mechanism structure of the present invention. Figure 2 .

[0032] Reference numerals: 101-Outer cylinder; 102-Inlet pipe; 103-Scum slope; 104-Water pump; 105-Scum collection box; 106-Scum discharge slope; 107-Upper fixed plate; 108-Inlet tank; 109-Inlet pipe; 110-Motor frame; 111-Scum-discharging motor; 112-Rotating frame; 113-Discharging plate; 114-Outlet pipe; 115-Rear connecting pipe; 116-Bacteria connecting pipe; 117-Scum removal connecting pipe; 118-Sink removal connecting pipe; 201-Sedimentation transparent pipe; 2011-Lower inlet hole; 2012-Upper outlet hole; 202-Sensor frame; 203-Optical sensor; 204-Upper frame; 205-Lifting electric cylinder; 206-Lifting slope block; 207-Horizontal column; 208-Lifting column; 209-Top wheel; 210- 211-Lifting spring; 212-Lower sealing plate; 213-Bottom sealing plate; 214-Slag retaining slope; 215-Ventilation groove; 301-Float removal pipe; 3011-Water inlet hole; 3012-Water outlet hole; 302-Top electric cylinder; 303-Sloping hole plate; 304-Side hole plate; 305-Side sealing plate; 401-Aerobic tank; 4011-Aerobic water inlet hole; 4012-Aerobic water outlet hole; 402-Anaerobic tank; 4021-Anaerobic water inlet pipe; 4022-Anaerobic water outlet pipe; 403-Air pipe; 404-Air outlet end; 405-Left electric cylinder; 406-Left lifting plate; 407-Left inner column; 408-Aerobic bacteria basket; 409-Right electric cylinder; 410-Right lifting plate; 411-Right inner column; 412-Anaerobic bacteria basket. 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] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] Example: Figures 1-12 As shown, a multi-stage wastewater treatment device for environmental engineering includes a main body for conveying wastewater. The main body includes an outer cylinder 101. The main body is equipped with two sedimentation mechanisms for separating sediments in the wastewater, a floating mechanism for separating floating matter in the wastewater, and a treatment mechanism for aerobic and anaerobic treatment of the wastewater. The sedimentation mechanism includes a sedimentation transparent tube 201, the floating mechanism includes a float removal tube 301 with a notch at the top, and the treatment mechanism includes an aerobic tank 401 and an anaerobic tank 402. The sedimentation transparent tube 201 is provided with a lower water inlet 2011 and an upper water outlet 2012, the float removal tube 301 is provided with a water inlet 3011 and a water outlet 3012, the aerobic tank 401 is provided with an aerobic water inlet 4011 and an aerobic water outlet 4012, and the anaerobic tank 402 is provided with an anaerobic water inlet pipe 4021 and an anaerobic water outlet pipe 4022. The two sedimentation mechanisms are a primary sedimentation mechanism and a secondary sedimentation mechanism. A water inlet pipe 109 is fixedly installed on the lower water inlet 2011 of the primary sedimentation mechanism, and a water outlet pipe 114 is fixedly installed on the upper water outlet 2012 of the secondary sedimentation mechanism.

[0036] like Figures 3-6 As shown, the main structure includes an upper fixed plate 107 fixedly installed on the outer cylinder 101, a flotation pipe 301, an aerobic tank 401, an anaerobic tank 402, and two sedimentation transparent pipes 201 fixedly installed on the upper fixed plate 107. A sedimentation connecting pipe 118 is connected to the upper outlet hole 2012 of the primary sedimentation mechanism. The other end of the sedimentation connecting pipe 118 is connected to the inlet hole 3011. A flotation connecting pipe 117 is connected to the outlet hole 3012. The other end of the flotation connecting pipe 117 is connected to the anaerobic inlet pipe 4021. A bacteria connecting pipe 116 is connected to the anaerobic outlet pipe 4022. The other end of the bacteria connecting pipe 116 is connected to the aerobic inlet hole 4011. A rear connecting pipe 115 is connected to the aerobic outlet hole 4012. The other end of the rear connecting pipe 115 is connected to the lower inlet hole 2011 of the secondary sedimentation mechanism.

[0037] like Figures 3-6As shown, an inlet tank 108 is fixedly installed inside the outer cylinder 101, an inlet pipe 102 is fixedly installed on the inlet tank 108, a water pump 104 is fixedly installed on the inlet tank 108, the water pump 104 is connected to the water supply pipe 109, the inner surface of the inlet tank 108 is a slope, and a scum slope 103 is provided on the outer cylinder 101, the scum slope 103 is located next to the top notch of the float removal pipe 301.

[0038] like Figures 3-6 As shown, a slag collection box 105 is fixedly installed on the water inlet tank 108, a slag discharge slope 106 is fixedly installed on the slag collection box 105, several holes are provided at the bottom of the slag collection box 105, a motor frame 110 is fixedly installed on the slag collection box 105, a slag-discharging motor 111 is fixedly installed on the motor frame 110, a rotating frame 112 is fixedly installed on the motor shaft of the slag-discharging motor 111, and multiple paddles 113 are fixedly installed on the rotating frame 112, with the paddles 113 fitting against the slag collection box 105.

[0039] Wastewater enters the inlet pipe 102 and flows into the inlet tank 108. The water pump 104 starts, drawing the wastewater from the inlet tank 108 through the water supply pipe 109 into the sedimentation transparent pipe 201 of the primary sedimentation mechanism. In the primary sedimentation mechanism, sludge and other sediments in the wastewater are separated. Subsequently, the wastewater enters the deflocculation pipe 301 through the desettling connection pipe 118 to separate floating impurities. Then, the wastewater enters the anaerobic tank 402 through the deflocculation connection pipe 117, where anaerobic bacteria perform denitrification, hydrolysis acidification, and phosphorus release treatment. Subsequently, the wastewater enters the aerobic tank 401 through the bacteria connection pipe 116, where aerobic bacteria perform COD degradation, nitrification, and phosphorus uptake treatment. Finally, the wastewater enters the sedimentation transparent pipe 201 of the secondary sedimentation mechanism through the rear connection pipe 115, where sediments in the wastewater are separated again. Finally, the wastewater is discharged through the outlet pipe 114.

[0040] like Figure 7 , Figure 8 As shown, the sedimentation mechanism includes a sensor frame 202 fixedly installed on the sedimentation transparent tube 201. Two optical sensors 203 are installed on the sensor frame 202. A lifting column 208 is slidably installed inside the sedimentation transparent tube 201. An upper frame 204 is fixedly installed on the sedimentation transparent tube 201. A lifting spring 210 is provided between the lifting column 208 and the upper frame 204. An upper sealing plate 211, a lower sealing plate 212, and a bottom sealing plate 213 are fixedly installed on the lifting column 208. A through hole is provided at the bottom of the sedimentation transparent tube 201. A ventilation groove 215 is provided on the lifting column 208. Under normal conditions, the bottom sealing plate 213 seals the through hole at the bottom of the sedimentation transparent tube 201. A slag-blocking slope 214 is fixedly installed inside the sedimentation transparent tube 201. The lifting column 208 and the slag-blocking slope 214 are slidably installed.

[0041] like Figure 7 , Figure 8As shown, a lifting electric cylinder 205 is fixedly installed on the upper frame 204, a lifting ramp 206 is fixedly installed on the output end of the lifting electric cylinder 205, a horizontal column 207 is fixedly installed on the lifting ramp 206, the horizontal column 207 is slidably installed with the upper frame 204, and a top wheel 209 is rotatably installed on the lifting column 208, the top wheel 209 cooperates with the lifting ramp 206.

[0042] After wastewater enters the sedimentation transparent tube 201 through the lower inlet 2011, the sediment settles at the bottom, and the clear liquid is discharged through the upper outlet 2012. The sludge retaining slope 214 is used to block the sediment. When the optical sensor 203 detects that the sediment height in the sedimentation transparent tube 201 has reached the optical sensor 203, the lifting cylinder 205 extends, lifting the top wheel 209 and the lifting column 208 through the lifting slope block 206. The lifting spring 210 is compressed, causing the upper sealing plate 211 to close the upper outlet 2012 and the lower sealing plate 212 to close the lower inlet 2011, stopping the inflow and outflow of water. At the same time, the bottom sealing plate 213 rises, causing the bottom through hole of the sedimentation transparent tube 201 to open, and the sediment and some wastewater are discharged into the collection tank through the bottom through hole of the sedimentation transparent tube 201. In the slag box 105, the sediment is located on the slag collection box 105. Wastewater enters the inlet tank 108 through the through hole of the slag collection box 105 and is treated again along with subsequent wastewater. The slag-removing motor 111 drives the rotating frame 112 and the deflector 113 to rotate. The deflector 113 removes the sediment on the slag collection box 105 from the slag discharge slope 106. When the lifting column 208 rises, the ventilation groove 215 connects the inner cavity of the sedimentation transparent tube 201 with the external gas. After all the sediment is discharged, the lifting cylinder 205 retracts, the spring 210 rebounds, and the lifting column 208 descends. The bottom sealing plate 213 closes the bottom through hole of the sedimentation transparent tube 201 again, the upper sealing plate 211 opens the upper water outlet 2012, and the lower sealing plate 212 opens the lower water inlet 2011.

[0043] like Figure 9 , Figure 10 As shown, the floating mechanism includes a top electric cylinder 302 fixedly installed on the top of the float tube 301. A beveled hole plate 303 is fixedly installed on the output end of the top electric cylinder 302. The beveled hole plate 303 has several holes. A side hole plate 304 and a side sealing plate 305 are fixedly installed on the beveled hole plate 303. The side hole plate 304 has several holes.

[0044] After the sewage enters the float removal pipe 301 through the inlet 3011, the sewage will sink to the bottom of the float removal pipe 301, while the floating objects will be blocked by the sloping hole plate 303. As the sewage level rises, the sewage will enter the outlet 3012 through the holes of the side hole plate 304. The floating objects will be blocked by the side hole plate 304. Every once in a while, the top electric cylinder 302 retracts. The retraction of the top electric cylinder 302 will drive the sloping hole plate 303, the side hole plate 304 and the side sealing plate 305 to rise. The side hole plate 304 will close the inlet 3011, and the outlet 3012 will be offset from the holes of the side hole plate 304. The rise of the sloping hole plate 303 will drive the floating objects to rise together. The floating objects will leave the device through the scum slope 103. Then the top electric cylinder 302 will extend, driving the sloping hole plate 303, the side hole plate 304 and the side sealing plate 305 to reset, and the inlet 3011 will reopen.

[0045] like Figure 11 , Figure 12 As shown, the processing mechanism includes a left electric cylinder 405 fixedly installed on the upper fixed plate 107. A left lifting plate 406 is fixedly installed on the output end of the left electric cylinder 405. A left inner column 407 is fixedly installed on the left lifting plate 406. Four aerobic bacteria baskets 408 are provided on the left inner column 407. Aerobic bacteria are placed in the aerobic bacteria baskets 408. An air pipe 403 is fixedly installed on the aerobic tank 401. The air pipe 403 is connected to an external air machine. An air outlet 404 is fixedly installed on the air pipe 403.

[0046] like Figure 11 , Figure 12 As shown, a right electric cylinder 409 is fixedly installed on the upper fixed plate 107, a right lifting plate 410 is fixedly installed on the output end of the right electric cylinder 409, a right inner column 411 is fixedly installed on the right lifting plate 410, and four anaerobic bacteria baskets 412 are provided on the right inner column 411, with anaerobic bacteria placed in the anaerobic bacteria baskets 412.

[0047] Wastewater enters the anaerobic tank 402 through the anaerobic inlet pipe 4021, where it is anaerobically treated by anaerobic bacteria in the anaerobic bacteria basket 412. Subsequently, the wastewater enters the aerobic tank 401 through the bacteria connection pipe 116 and the aerobic inlet hole 4011, where it is aerobically treated by aerobic bacteria in the aerobic bacteria basket 408. An air blower aerates the wastewater in the aerobic tank 401 through the air pipe 403 and the air outlet 404 to provide oxygen for the aerobic bacteria. Finally, the wastewater enters the secondary sedimentation unit through the aerobic outlet hole 4012.

[0048] The extension of the left electric cylinder 405 and the right electric cylinder 409 can respectively drive the left inner column 407 and the right inner column 411 to rise, thereby lifting the aerobic bacterial basket 408 and the anaerobic bacterial basket 412 away from the aerobic tank 401 and the anaerobic tank 402, making it easier to observe and process the bacterial community.

[0049] The working principle of the multi-stage wastewater treatment equipment for environmental engineering disclosed in this invention is as follows: Wastewater is introduced into the inlet pipe 102 and enters the inlet tank 108. The water pump 104 is started, and the wastewater is drawn from the inlet tank 108 into the sedimentation transparent tube 201 of the primary sedimentation mechanism through the upper water pipe 109. After the wastewater enters the sedimentation transparent tube 201 through the lower water inlet 2011, the sediment settles at the bottom, and the clear liquid is discharged through the upper water outlet 2012. The sludge retaining slope 214 is used to block the sediment. When the optical sensor 203 detects that the height of the sediment in the sedimentation transparent tube 201 reaches the optical sensor 203, the lifting cylinder 205 extends, and the lifting slope block 206 lifts the top wheel 209 and the lifting column 208. The lifting spring 210 is compressed, so that the upper sealing plate 211 closes the upper water outlet 2012 and the lower sealing plate 212 closes the lower water inlet 2011, stopping the water inflow and outflow. At the same time, the bottom sealing plate... As 213 rises, the bottom through-hole of the sedimentation transparent tube 201 opens, allowing sediment and some wastewater to be discharged into the slag collection box 105 through the bottom through-hole. The sediment is located on the slag collection box 105, while the wastewater enters the inlet tank 108 through the through-hole of the slag collection box 105, where it is treated again along with subsequent wastewater. The slag-removing motor 111 drives the rotating frame 112 and the paddle 113 to rotate, and the paddle 113 removes the sediment on the slag collection box 105 from the slag discharge slope 106. When the lifting column 208 rises, the ventilation groove 215 connects the inner cavity of the sedimentation transparent tube 201 with the external gas. After all the sediment is discharged, the lifting cylinder 205 retracts, lifting the spring 210 to rebound, causing the lifting column 208 to descend. The bottom sealing plate 213 closes the bottom through-hole of the sedimentation transparent tube 201 again, the upper sealing plate 211 opens the upper water outlet 2012, and the lower sealing plate 212 opens the lower water inlet 2011. In the primary sedimentation unit, sludge and other sediments in the wastewater are separated. The wastewater then enters the defloting pipe 301 through the desettling connection pipe 118. After entering the defloting pipe 301 through the inlet hole 3011, the wastewater sinks to the bottom of the defloting pipe 301, while floating debris is blocked by the sloping hole plate 303. As the wastewater level rises, the wastewater enters the outlet hole 3012 through the holes in the side orifice plate 304, where floating debris is blocked again. At regular intervals, the top electric cylinder 302 retracts. Once, the top electric cylinder 302 retracts, causing the beveled hole plate 303, side hole plate 304, and side sealing plate 305 to rise. The side hole plate 304 closes the water inlet 3011, and the water outlet 3012 is offset from the hole of the side hole plate 304. The beveled hole plate 303 rises, causing the floating objects to rise together. The floating objects leave the device through the scum slope 103. Then, the top electric cylinder 302 extends, causing the beveled hole plate 303, side hole plate 304, and side sealing plate 305 to reset, and the water inlet 3011 reopens.Floating impurities in the wastewater are separated, and then the wastewater enters the anaerobic tank 402 through the deflocculation connection pipe 117. The wastewater enters the anaerobic tank 402 through the anaerobic inlet pipe 4021. Anaerobic bacteria in the anaerobic basket 412 perform denitrification, hydrolysis acidification, and phosphorus release treatment on the wastewater. Then, the wastewater enters the aerobic tank 401 through the bacteria connection pipe 116 and the aerobic inlet 4011. Aerobic bacteria in the aerobic basket 408 perform COD degradation, nitrification, and phosphorus uptake treatment on the wastewater. An air blower aerates the wastewater in the aerobic tank 401 through the air pipe 403 and the air outlet 404 to provide oxygen for the aerobic bacteria. Then, the wastewater enters the sedimentation transparent tube 201 of the secondary sedimentation mechanism through the aerobic outlet 4012 to separate the sediment in the wastewater again. Finally, the wastewater is discharged through the outlet pipe 114.

[0050] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the protection scope of this invention.

Claims

1. A multi-stage sewage treatment apparatus for environmental engineering, comprising a main body mechanism for feeding sewage, characterized in that: The main body mechanism comprises an outer cylinder (101), two sedimentation mechanisms for separating and treating the sediment in sewage, a floating mechanism for separating and treating the floating matter in sewage and a treatment mechanism for aerobic and anaerobic treatment of sewage, the sedimentation mechanism comprises a sedimentation transparent tube (201), the floating mechanism comprises a floating removal tube (301) provided with a notch at the top, and the treatment mechanism comprises an aerobic tank (401) and an anaerobic tank (402); The sedimentation transparent tube (201) is provided with a lower water inlet hole (2011) and an upper water outlet hole (2012), the floating removal tube (301) is provided with a water inlet hole (3011) and a water outlet hole (3012), the aerobic tank (401) is provided with an aerobic water inlet hole (4011) and an aerobic water outlet hole (4012), and the anaerobic tank (402) is provided with an anaerobic water inlet pipe (4021) and an anaerobic water outlet pipe (4022). The two sedimentation mechanisms are a primary sedimentation mechanism and a secondary sedimentation mechanism, respectively, and the upper water pipe (109) is fixedly installed on the lower water inlet hole (2011) of the primary sedimentation mechanism, and the water outlet pipe (114) is fixedly installed on the upper water outlet hole (2012) of the secondary sedimentation mechanism.

2. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 1, characterized in that: The main body mechanism comprises an upper fixed disc (107) fixedly installed on the outer cylinder (101), the floating removal tube (301), the aerobic tank (401), the anaerobic tank (402) and the two sedimentation transparent tubes (201) are fixedly installed on the upper fixed disc (107), the sediment removal connecting pipe (118) is connected to the upper water outlet hole (2012) of the primary sedimentation mechanism, the other end of the sediment removal connecting pipe (118) is connected to the water inlet hole (3011), the floating removal connecting pipe (117) is connected to the water outlet hole (3012), the other end of the floating removal connecting pipe (117) is connected to the anaerobic water inlet pipe (4021), the bacteria connecting pipe (116) is connected to the anaerobic water outlet pipe (4022), the other end of the bacteria connecting pipe (116) is connected to the aerobic water inlet hole (4011), the rear connecting pipe (115) is connected to the aerobic water outlet hole (4012), and the other end of the rear connecting pipe (115) is connected to the lower water inlet hole (2011) of the secondary sedimentation mechanism.

3. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 2, characterized in that: The water inlet tank (108) is fixedly installed in the outer cylinder (101), the water inlet pipe (102) is fixedly installed on the water inlet tank (108), the water pump (104) is fixedly installed on the water inlet tank (108), the water pump (104) is connected to the upper water pipe (109), the inner surface of the water inlet tank (108) is a slope, and the scum slope (103) is arranged on the outer cylinder (101) and located beside the top notch of the floating removal tube (301).

4. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 3, characterized in that: The water inlet tank (108) is fixedly installed with a slag collecting box (105), the slag collecting box (105) is fixedly installed with a slag discharging slope (106), the bottom of the slag collecting box (105) is provided with a plurality of holes, the slag collecting box (105) is fixedly installed with a motor rack (110), the motor rack (110) is fixedly installed with a slag stirring motor (111), the motor shaft of the slag stirring motor (111) is fixedly installed with a rotating frame (112), the rotating frame (112) is fixedly installed with a plurality of stirring blades (113), and the stirring blades (113) are attached to the slag collecting box (105).

5. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 1, characterized in that: The precipitation mechanism comprises a sensor rack (202) fixedly installed on a precipitation transparent pipe (201), two optical sensors (203) are arranged on the sensor rack (202), a lifting column (208) is slidably installed in the precipitation transparent pipe (201), an upper rack (204) is fixedly installed on the precipitation transparent pipe (201), a jacking spring (210) is arranged between the lifting column (208) and the upper rack (204), an upper sealing piece (211), a lower sealing piece (212) and a bottom sealing piece (213) are fixedly installed on the lifting column (208), the bottom of the precipitation transparent pipe (201) is provided with a through hole, a ventilation groove (215) is arranged on the lifting column (208), in a normal state, the bottom sealing piece (213) seals the through hole at the bottom of the precipitation transparent pipe (201), a slag blocking slope (214) is fixedly installed in the precipitation transparent pipe (201), and the lifting column (208) and the slag blocking slope (214) are slidably installed.

6. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 5, characterized in that: The upper rack (204) is fixedly installed with a lifting cylinder (205), a jacking slope block (206) is fixedly installed on the output end of the lifting cylinder (205), a cross column (207) is fixedly installed on the jacking slope block (206), the cross column (207) is slidably installed on the upper rack (204), a jacking wheel (209) is rotatably installed on the lifting column (208), and the jacking wheel (209) is matched with the jacking slope block (206).

7. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 1, characterized in that: The floating mechanism comprises a top cylinder (302) fixedly installed at the top of a floating removing pipe (301), a slope hole plate (303) is fixedly installed on the output end of the top cylinder (302), a plurality of holes are arranged on the slope hole plate (303), a side hole plate (304) and a side sealing plate (305) are fixedly installed on the slope hole plate (303), and a plurality of holes are arranged on the side hole plate (304).

8. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 2, characterized in that: The processing mechanism comprises a left electric cylinder (405) fixedly installed on the upper fixed disc (107), an output end of the left electric cylinder (405) is fixedly installed with a left lifting plate (406), the left lifting plate (406) is fixedly installed with a left inner column (407), four aerobic bacteria baskets (408) are arranged on the left inner column (407), aerobic bacteria are placed in the aerobic bacteria baskets (408), an air pipe (403) is fixedly installed on the aerobic tank (401), the air pipe (403) is connected with an external air machine, and an air outlet end (404) is fixedly installed on the air pipe (403).

9. The multi-stage sewage treatment equipment for environmental protection engineering according to claim 8, characterized in that: The upper fixed disc (107) is fixedly installed with a right electric cylinder (409), an output end of the right electric cylinder (409) is fixedly installed with a right lifting plate (410), the right lifting plate (410) is fixedly installed with a right inner column (411), four anaerobic bacteria baskets (412) are arranged on the right inner column (411), and anaerobic bacteria are placed in the anaerobic bacteria baskets (412).

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