A wastewater treatment device for environmental engineering

Abstract

An environmental engineering wastewater treatment device, relating to the field of water treatment equipment, includes a reaction structure and a sedimentation structure. The reaction structure includes a reaction chamber with an inlet on one side and a dosing port at the top. A dosing pipe is inserted into the dosing port, with a funnel at the top and a motor on the side. A drip pipe is connected to the bottom of the dosing pipe via a T-junction. An outlet is located at the bottom of the inlet. The sedimentation structure includes an inclined plate connected to the inner wall of the reaction chamber at both ends and the top. A settling tank is located at the bottom, with a movable bottom near the inclined plate. A telescopic cylinder is installed at the end of the movable bottom, and a sludge discharge port is located at the bottom of the settling tank. Compared with existing technologies, the advantages of this invention are: significantly reduced floor space and equipment complexity; greatly improved flocculation effect and reagent utilization; complete solution to the clogging problem of traditional sludge discharge valves; good overall sealing; high treatment efficiency; and suitability for the efficient treatment of industrial wastewater with high suspended solids.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment, and more particularly to a wastewater treatment device for environmental engineering. Background Technology

[0002] In the field of environmental engineering, industrial and municipal wastewater treatment technologies continue to evolve, with core processes including physical sedimentation, chemical flocculation, and biodegradation. Traditional wastewater treatment plants typically employ a split design, with reaction and sedimentation units connected in series via pipelines, supplemented by external dosing systems and sludge removal equipment. In recent years, integrated treatment equipment has gained attention due to its smaller footprint and ease of operation and maintenance. For example, the combined design of inclined plate sedimentation tanks and mechanically stirred reactors is widely used in small and medium-scale wastewater treatment scenarios. Dosing systems have also evolved from early manual dosing to a combination of mechanical stirring, hydraulic mixing, and precision metering pumps, improving reagent diffusion efficiency and mixing uniformity. Regarding sludge removal, mainstream technologies still rely on gravity sludge valves, screw pumps, or air-lift devices. While these can achieve sludge removal, they are prone to clogging in the treatment of high-viscosity sludge or wastewater containing fibrous materials. Furthermore, to enhance solid-liquid separation, inclined tube / plate sedimentation technology has become an industry standard, significantly improving sedimentation efficiency by increasing the effective settling area. However, the integration of existing technologies is still insufficient, and there is room for further improvement in the synergy and spatial optimization between functional modules.

[0003] Although existing technologies have achieved basic treatment functions, their structural design still has several limitations. First, traditional dosing systems mostly use fixed nozzles or static mixers, and the uniformity of reagent distribution is greatly affected by the water flow conditions, easily leading to localized overdosing or insufficient mixing, affecting flocculation effects and increasing reagent costs. Second, the reliability of the sludge discharge process is a prominent issue: designs with fixed bottom sludge discharge ports often suffer from valve closure failure or opening failure due to sludge accumulation or particle blockage, requiring frequent manual cleaning and affecting the stability of continuous system operation. Utility Model Content

[0004] This application provides a wastewater treatment device for environmental engineering, which solves the problems of uneven reagent mixing, low sludge discharge reliability, and inconvenient maintenance in existing wastewater treatment devices.

[0005] This application provides a wastewater treatment device for environmental engineering, including a reaction structure and a sedimentation structure. The reaction structure includes a reaction chamber, an inlet on one side of the reaction chamber, a dosing port on the top of the reaction chamber, a dosing pipe inserted into the dosing port, a funnel on the top of the dosing pipe, a motor on the side of the dosing pipe, a dripping pipe connected to the bottom of the dosing pipe via a T-junction, and an outlet at the bottom of the inlet. The sedimentation structure includes an inclined plate, with its two ends and top connected to the inner wall of the reaction chamber. A sedimentation tank is provided at the bottom, with a movable bottom on the side of the sedimentation tank near the inclined plate. A telescopic cylinder is installed at the end of the movable bottom, and a sludge discharge port is provided at the bottom of the sedimentation tank.

[0006] As an improvement, the reaction chamber is a rectangular hollow structure with the inlet, dosing port and outlet coplanar and all located on the centerline of the reaction chamber. The outlet is located above the sedimentation tank for easy collection of supernatant.

[0007] As an improvement, the side of the dosing tube is provided with bevel teeth one, and the motor is provided with bevel teeth two. Bevel teeth one and bevel teeth two mesh together, and the rotational power of the horizontally arranged motor shaft is transmitted to the vertically arranged dosing tube through the meshing bevel teeth, so that it rotates.

[0008] As an improvement, the funnel is mounted on the support arm, the end of the support arm is provided with a collar, the support arm is L-shaped, and the bottom is provided with an insert plate. The top of the reaction chamber is provided with a slot that mates with the insert plate. The support arm and the funnel can be adjusted and installed according to actual needs, and the dripping can be replaced with pumping to adjust the dispensing speed.

[0009] As an improvement, the drip tube is equipped with several drip nozzles, which are evenly spaced below the drip tube. The evenly spaced drip nozzles work in conjunction with the rotating drip tube to ensure that the medicine is evenly dripped into the wastewater.

[0010] As an improvement, the side of the inclined plate away from the outlet is raised, and the connection between the inclined plate and the sedimentation tank is a rounded corner structure. The function of the inclined plate is to guide the sludge to the sedimentation tank during the sedimentation process, so that it can be further settled and solidified.

[0011] As an improvement, the sedimentation tank sidewall is equipped with guide rails in a C-shape, with the opening on the side where the movable bottom is located. The guide rails are symmetrically distributed vertically to clamp the movable bottom. The movable bottom is sealed to the sedimentation tank sidewall. If necessary, a scraper can be added to the sedimentation tank sidewall to scrape off the sludge on the upper surface of the movable bottom. The connection between the movable bottom and the guide rail is also equipped with a sealing structure to ensure that the entire reaction chamber is sealed.

[0012] As an improvement, the movable bottom is perpendicular to the side wall of the sedimentation tank, the longitudinal section of the movable bottom is T-shaped, the movable bottom is set along the direction from the inclined plate to the outlet, and the entire movable bottom is parallel to the ground.

[0013] As an improvement, the telescopic cylinders are symmetrically arranged on both sides of the movable bottom. The telescopic cylinders are connected to the bottom of the reaction chamber via connecting rods. An inspection port is provided on the side of the reaction chamber away from the water outlet. The inspection port is located below the inclined plate. The connecting rods fix the position of the telescopic cylinders. There are two telescopic cylinders on each cylinder. The highest point of the inclined plate is at half the height of the reaction chamber. The inspection port is located between the inclined plate and the bottom plate of the reaction chamber, which facilitates observation and maintenance of the cylinders.

[0014] As an improvement, the bottom of the reaction chamber is provided with support legs, which are located at the edge of the bottom plate of the reaction chamber excluding the sludge discharge port. The support legs facilitate the collection of sludge at the bottom of the reaction chamber.

[0015] Compared with existing technologies, the advantages of this invention are as follows: It adopts an integrated reaction and sedimentation structure, significantly reducing the floor space and equipment complexity. The rotary dosing system drives the dosing tube to rotate via bevel gear transmission, and combined with evenly distributed nozzles, achieves uniform three-dimensional dispersion of the reagent, greatly improving flocculation effect and reagent utilization. The unique retractable movable bottom design, combined with the guide rail system, enables precise opening and closing of the sedimentation tank bottom via cylinder control, completely solving the problem of clogging in traditional sludge discharge valves. The equipment has a high degree of integration, strong automation, and a dedicated inspection port, significantly improving maintenance convenience. The overall device has good sealing performance and high treatment efficiency, making it suitable for the efficient treatment of industrial wastewater with high suspended solids. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0017] Figure 1 Structural schematic diagrams provided for embodiments of this application; Figure 2 A rear view provided for embodiments of this application; Figure 3 A bottom view provided for embodiments of this application; Figure 4 A perspective view provided for an embodiment of this application; Figure 5 A cross-sectional view of section AA provided for an embodiment of this application.

[0018] The components are as follows: 1. Reaction structure; 11. Reaction chamber; 111. Slot; 112. Inspection port; 113. Support leg; 12. Inlet; 13. Dosing port; 14. Dosing pipe; 141. Umbrella tooth one; 15. Funnel; 151. Support arm; 152. Collar; 153. Insert plate; 16. Motor; 161. Umbrella tooth two; 17. T-junction; 18. Drip pipe; 181. Drip nozzle; 19. Outlet; 2. Sedimentation structure; 21. Inclined plate; 22. Sedimentation tank; 221. Guide rail; 23. Movable bottom; 24. Telescopic cylinder; 241. Connecting rod; 25. Sludge discharge port. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0023] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0024] like Figures 1-5 An environmental engineering wastewater treatment device includes a reaction structure 1 and a sedimentation structure 2. The reaction structure 1 includes a reaction chamber 11, an inlet 12 on one side of the reaction chamber 11, a dosing port 13 on the top of the reaction chamber 11, a dosing pipe 14 inserted inside the dosing port 13, a funnel 15 on the top of the dosing pipe 14, a motor 16 on the side of the dosing pipe 14, and a drip pipe 18 connected to the bottom of the dosing pipe 14 via a tee 17. The inlet 12 has an outlet 19 at its bottom. The sedimentation structure 2 includes an inclined plate 21, with its two ends and top connected to the inner wall of the reaction chamber 11. A sedimentation tank 22 is provided at the bottom, and a movable bottom 23 is provided on the side of the sedimentation tank 22 near the inclined plate 21. A telescopic cylinder 24 is installed at the end of the movable bottom 23, and a sludge discharge port 25 is provided at the bottom of the sedimentation tank 22.

[0025] As an improvement, the reaction chamber 11 is a rectangular hollow structure, with the inlet 12, the dosing port 13 and the outlet 19 having coplanar centers, all located on the centerline of the reaction chamber 11. The outlet 19 is located above the sedimentation tank 22, which facilitates the collection of supernatant.

[0026] As an improvement, the side of the dosing tube 14 is provided with bevel teeth 141, and the motor 16 is provided with bevel teeth 161. The bevel teeth 141 and the bevel teeth 161 mesh with each other, and the rotational power of the horizontally arranged motor shaft 16 is transmitted to the vertically arranged dosing tube 14 through the meshing bevel teeth, so that it rotates.

[0027] As an improvement, the funnel 15 is mounted on the support arm 151, the end of the support arm 151 is provided with a collar 152, the support arm 151 is L-shaped, and the bottom is provided with an insert plate 153. The top of the reaction chamber 11 is provided with a slot 111 that cooperates with the insert plate 153. The support arm 151 and the funnel 15 can be adjusted and installed according to actual needs, and the dripping medicine can be replaced with pumping medicine to increase or decrease the dispensing speed.

[0028] As an improvement, the drip tube 18 is equipped with several drip nozzles 181. The drip nozzles 181 are evenly spaced directly below the drip tube 18. The evenly spaced drip nozzles 181 cooperate with the rotating drip tube 18 to ensure that the medicine is evenly dripped into the wastewater.

[0029] As an improvement, the side of the inclined plate 21 away from the outlet 19 is raised, and the connection between the inclined plate 21 and the sedimentation tank 22 is a rounded corner structure. The function of the inclined plate 21 is to guide the sludge to the sedimentation tank 22 during the sedimentation process so that it can be further settled and solidified.

[0030] As an improvement, the sedimentation tank 22 is provided with a guide rail 221 on the side wall. The guide rail 221 is C-shaped, with the opening on the side where the movable bottom 23 is located. The guide rail 221 is symmetrically distributed vertically and clamps the movable bottom 23. The movable bottom 23 is sealed to the side wall of the sedimentation tank 22. If necessary, a scraper can be added to the side wall of the sedimentation tank 22 to scrape off the sludge on the upper surface of the movable bottom 23. The connection between the movable bottom 23 and the guide rail 221 is also provided with a sealing structure to ensure that the entire reaction chamber 11 is sealed.

[0031] As an improvement, the movable bottom 23 is perpendicular to the side wall of the sedimentation tank 22, the longitudinal section of the movable bottom 23 is T-shaped, the movable bottom 23 is set along the direction from the inclined plate 21 to the outlet 19, and the entire movable bottom 23 is parallel to the ground.

[0032] As an improvement, the telescopic cylinders 24 are symmetrically arranged on both sides of the movable base 23. The telescopic cylinders 24 are connected to the bottom of the reaction chamber 11 through the connecting rod 241. The side of the reaction chamber 11 away from the outlet 19 is provided with an inspection port 112. The inspection port 112 is located below the inclined plate 21. The connecting rod 241 fixes the cylinder position of the telescopic cylinders 24. There are two telescopic cylinders 24. The highest point of the inclined plate 21 is at half the height of the reaction chamber 11. The inspection port 112 is located between the inclined plate 21 and the bottom plate of the reaction chamber 11, which facilitates observation and maintenance of the cylinders.

[0033] As an improvement, the bottom of the reaction chamber 11 is provided with a support leg 113. The support leg 113 is located at the edge of the bottom plate of the reaction chamber 11 except for the sludge discharge port 25. The support leg 113 is provided to facilitate the connection of sludge to the bottom of the reaction chamber 11.

[0034] Example: Working process and principle of a wastewater treatment device for environmental engineering The wastewater treatment device for environmental engineering described in this embodiment mainly consists of two major modules, reaction structure 1 and sedimentation structure 2, integrated into a reaction chamber 11. The models and specifications of the core outsourced components used in the equipment are as follows: Motor 16: TC-GM37-3530 DC geared motor from Dongguan Tengchi Motor Technology Co., Ltd., rated voltage 24VDC, output speed 30rpm, output torque 5kg·cm.

[0035] Telescopic cylinder 24: It adopts the SMC Corporation CJ2B10-30DG type double-acting single-rod cylinder with a cylinder diameter of 10mm, a stroke of 30mm, and an applicable pressure of 0.15-0.7MPa.

[0036] Solenoid valve: The solenoid valve controlling the telescopic cylinder 24 is an SMC SY3120-5LZ type three-position five-way solenoid valve with a voltage of 24VDC.

[0037] Liquid level sensor: PT124B-121 pressure liquid level transmitter from Shanghai Zhaohui Pressure Instrument Co., Ltd., with a range of 0-1 meter and 4-20mA output.

[0038] PLC controller: The Siemens SIMATIC S7-1200 series 6ES7214-1AG40-0XB0 is used as the core control unit to receive signals and control the coordinated operation of motor 16, cylinder, pump valve.

[0039] The device operates in batch processing mode, with a complete treatment cycle consisting of the following steps: influent dosing, mixing and reaction, settling, drainage, and sludge removal. All processes are automatically controlled by a PLC controller.

[0040] Initial state: The movable bottom 23 is in a closed state, and is tightly fitted to the side wall and bottom of the sedimentation tank 22 by the fluororubber sealing strips installed around it, forming a seal. The water inlet valve, water outlet valve, and sludge discharge valve are all in a closed state, and the motor 16 is in a stopped state.

[0041] Water inlet and chemical dosing process: The PLC controller first opens the water inlet solenoid valve located on the water inlet pipe 12. Wastewater begins to flow into the reaction chamber 11. At the same time, the PLC starts the dosing pump (model: Lange constant flow pump LSP01-1A), which is connected to the funnel 15 through a hose, and adds the coagulant or flocculant solution to the dosing pipe 14 through the funnel 15.

[0042] Component Operation and Principle: The liquid medicine flows into the tee 17 at the bottom of the dosing pipe 14 and is distributed to two drip pipes 18. Simultaneously, the PLC starts the motor 16. The bevel gear 161 on the output shaft of the motor 16 rotates, driving the bevel gear 141 meshing with it to rotate. This causes the dosing pipe 14 and the drip pipes 18, which are keyed to the bevel gear 141, to rotate slowly together at approximately 30 rpm. The liquid medicine flows under gravity within the rotating drip pipes 18 and is finally sprayed out in droplets through multiple equally spaced nozzles 181 below. Because the drip pipes 18 are rotating, the liquid medicine is evenly sprayed into the rising wastewater, achieving initial mixing.

[0043] Endpoint determination: When the liquid level sensor installed on the inner wall of reaction chamber 11 detects that the liquid level has reached the preset height and is 10cm above the dosing pipe 18, it sends a signal to the PLC. The PLC shuts off the water inlet valve and the dosing pump, but keeps motor 16 running, and proceeds to the next stage.

[0044] Mixing reaction period process: During this stage, motor 16 runs continuously for a period of time, such as 5-10 minutes, and the time can be set in the PLC.

[0045] Component Operation and Principle: The continuously rotating drip tube 18 and drip nozzle 181 act as a stirring paddle, gently agitating the wastewater in the chamber. This promotes full contact and reaction between the medicine and suspended solids and colloidal particles in the wastewater, forming larger alum flocs. At the end of this stage, the PLC stops the motor 16.

[0046] Settling and sedimentation process: All moving parts stop, and the device is allowed to settle completely for, for example, 20-30 minutes.

[0047] Component Operation and Principle: Under the influence of gravity, the flocs formed in the wastewater begin to slowly settle, and the inclined plate 21 plays a crucial role in this stage. Upon encountering the inclined surface of the inclined plate 21, the settling flocs slide down the slope and accumulate in the settling tank 22, which is formed by the bottom of the inclined plate 21 and the bottom plate of the reaction chamber 11, and deposit on the upper surface of the closed movable bottom 23. The inclined plate 21 significantly increases the effective settling area and shortens the settling distance, thereby accelerating the solid-liquid separation process. The rounded corner structure at the connection ensures that the sludge can smoothly slide into the settling tank 22 without any dead corners or accumulation.

[0048] Drainage process: After the settling time is over, the PLC opens the drain solenoid valve located on the outlet 19 pipe.

[0049] Component operation and principle: After sedimentation, the treated clear water is discharged from the outlet 19 located above the settling tank 22, and collected for reuse or discharge. This design ensures that only the clear liquid from the top is discharged, and the concentrated sludge at the bottom will not be disturbed.

[0050] Sludge removal process: After drainage is completed, the PLC controls the solenoid valve to switch directions, driving the piston rods of the two telescopic cylinders 24 to retract.

[0051] Component operation and principle: The piston rod of the telescopic cylinder 24 is connected to the T-shaped flange at the end of the movable bottom 23 via a pin. When the piston rod retracts, it pulls the movable bottom 23 outward along the C-shaped guide rails 221 on both sides, gradually opening the bottom of the settling tank 22. The concentrated sludge deposited on the upper surface of the movable bottom 23 automatically falls from the opened bottom opening into the sludge collection tank below or is discharged through the pipe connected to the sludge discharge port 25 under the action of gravity.

[0052] Sealing and Sludge Scraping Design: To ensure airtightness, a sealing strip 231 is installed on the contact surface between the movable bottom 23 and the side wall of the settling tank 22. When the movable bottom 23 is opened, the stainless steel scraper 222 installed on the side wall of the settling tank 22 scrapes away any residual sludge that may adhere to the surface of the movable bottom 23, ensuring thorough sludge removal. A sealing strip is also embedded on the contact surface between the movable bottom 23 and the guide rail 221 to prevent leakage.

[0053] Reset: After sludge discharge continues for a period of time, such as 1 minute, the PLC controls the piston rod of the telescopic cylinder 24 to extend, pushing the movable base 23 back to the closed state along the guide rail 221, resealing it. A complete processing cycle ends, the device returns to its initial state, and is ready for the next batch of processing.

[0054] When the equipment requires maintenance after long-term operation, the operator can open the inspection port 112 located on the side of the reaction chamber 11. This inspection port 112 is directly opposite the installation position of the telescopic cylinder 24 and the guide rail 221, facilitating observation of the cylinder's operating status, inspection of seal wear, or replacement and maintenance work. The support leg 113 provides stable support for the equipment and ensures sufficient space below the sludge discharge port 25 for connecting sludge collection containers or pipes.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An environmentally friendly engineering wastewater treatment device comprising a reaction structure (1) and a sedimentation structure (2), characterized in that: The reaction structure (1) includes a reaction chamber (11), an inlet (12) on one side of the reaction chamber (11), a dosing port (13) on the top of the reaction chamber (11), a dosing pipe (14) inserted inside the dosing port (13), a funnel (15) on the top of the dosing pipe (14), a motor (16) on the side of the dosing pipe (14), and a dripping pipe (18) connected to the bottom of the dosing pipe (14) via a tee (17). An outlet (19) is provided at the bottom of the inlet (12). The sedimentation structure (2) includes an inclined plate (21), the two ends and the top of the inclined plate (21) are connected to the inner wall of the reaction chamber (11), and a sedimentation tank (22) is provided at the bottom. A movable bottom (23) is provided on the side of the sedimentation tank (22) near the inclined plate (21), and a telescopic cylinder (24) is installed at the end of the movable bottom (23). A sludge discharge port (25) is provided at the bottom of the sedimentation tank (22).

2. The wastewater treatment device for environmental protection engineering according to claim 1, characterized in that: The reaction chamber (11) is a rectangular hollow structure, with the inlet (12), dosing port (13) and outlet (19) having coplanar centers.

3. The wastewater treatment device for environmental protection engineering according to claim 1, characterized in that: The dosing tube (14) has a bevel tooth (141) on its side and a bevel tooth (161) on the motor (16). The bevel tooth (141) and the bevel tooth (161) mesh with each other.

4. The wastewater treatment device for environmental engineering according to claim 1, characterized in that: The funnel (15) is mounted on the support arm (151). The end of the support arm (151) is provided with a collar (152). The support arm (151) is L-shaped and has a bottom plate (153). The top of the reaction chamber (11) is provided with a slot (111) that cooperates with the bottom plate (153).

5. The environmentally friendly wastewater treatment device for engineering use according to claim 1, characterized in that: The drip tube (18) is equipped with several drip nozzles (181), which are evenly spaced below the drip tube (18).

6. The environmentally friendly wastewater treatment device for engineering use according to claim 1, characterized in that: The inclined plate (21) has a high side away from the outlet (19), and the connection between the inclined plate (21) and the sedimentation tank (22) has a rounded corner structure.

7. The environmentally friendly wastewater treatment device for engineering use according to claim 1, characterized in that: The sedimentation tank (22) is provided with a guide rail (221) on its side wall. The guide rail (221) is C-shaped and the opening is on the side where the movable bottom (23) is located. The guide rail (221) is symmetrically distributed up and down to hold the movable bottom (23).

8. The environmentally friendly engineering wastewater treatment device according to claim 1, characterized in that: The movable bottom (23) is perpendicular to the side wall of the sedimentation tank (22). The longitudinal section of the movable bottom (23) is T-shaped. The movable bottom (23) is set along the direction from the inclined plate (21) to the outlet (19).

9. The environmentally friendly engineering wastewater treatment device according to claim 1, characterized in that: The telescopic cylinder (24) is symmetrically arranged on both sides of the movable bottom (23). The telescopic cylinder (24) is connected to the bottom of the reaction chamber (11) through the connecting rod (241). The side of the reaction chamber (11) away from the outlet (19) is provided with an inspection port (112), which is located below the inclined plate (21).

10. The environmentally friendly engineering wastewater treatment device according to claim 1, characterized in that: The bottom of the reaction chamber (11) is provided with a support leg (113), which is located at the edge of the bottom plate of the reaction chamber (11) excluding the sludge discharge port (25).

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