A controlled-release greening device for sludge from a municipal sewage treatment plant

Abstract

The utility model relates to a sludge controlled release field, solve at present, the sludge pretreatment device of application in the sludge of sewage plant field is usually simple structure, the filter cloth or filter screen in the device is easy to block, needs to dismantle equipment to clean up maintenance, and the operation is complicated, influences continuous processing efficiency, cannot effectively carry out solid -liquid separation, simultaneously cannot effectively handle the problem that the liquid pollutant of separation. Technical features include: first base, install first mount on the upper surface of first base, second base and install second mount on the upper surface of second base, there is a certain interval between first base and second base. The design of the adding opening on the bearing tank body is convenient for accurately adding functional additives such as conditioning agent, stabilizing bacterial agent, plant slow-release fertilizer substrate or heavy metal passivator before or during sludge separation, and the structure is relatively simple and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of sludge controlled release technology, and in particular to a sludge controlled release greening device for urban sewage treatment plants. Background Technology

[0002] With the acceleration of urbanization and the continuous improvement of environmental protection requirements, the stable operation of wastewater treatment plants, as core units of urban infrastructure, and the safe disposal of their byproducts (sludge) are receiving increasing attention. Sludge is an inevitable byproduct of wastewater treatment, characterized by high water content (usually >80%) and complex composition (containing organic matter, pathogens, heavy metals, and potential pollutants). Its treatment and resource utilization have become key issues restricting the sustainable development of the industry.

[0003] Traditional sludge treatment methods, such as landfill and incineration, have drawbacks such as occupying land, high costs, and risks of secondary pollution. Using treated sludge for non-food chain land improvement, such as urban greening, is a promising resource utilization approach.

[0004] Currently, sludge pretreatment devices used in wastewater treatment plants are usually simple in structure. The filter cloth or screen in the device is prone to clogging, requiring disassembly for cleaning and maintenance. This operation is cumbersome, affects continuous treatment efficiency, and cannot effectively separate solids and liquids. At the same time, it cannot effectively treat the separated liquid pollutants. Therefore, in order to solve this problem, it is necessary to design a controlled-release greening device for sludge in urban wastewater treatment plants. Utility Model Content

[0005] This utility model aims to solve the technical problems in the existing technology, where sludge pretreatment devices applied in sewage treatment plants are usually simple in structure, the filter cloth or screen in the device is easy to clog, the equipment needs to be disassembled for cleaning and maintenance, the operation is cumbersome, it affects the continuous treatment efficiency, and it cannot effectively separate solid and liquid, and at the same time cannot effectively treat the separated liquid pollutants. The present invention provides a sludge controlled release greening device for urban sewage treatment plants.

[0006] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0007] A controlled-release greening device for sludge from urban wastewater treatment plants includes:

[0008] A first base, a first mounting bracket mounted on the upper surface of the first base, a second base, and a second mounting bracket mounted on the upper surface of the second base;

[0009] There is a certain gap between the first base and the second base;

[0010] Also includes:

[0011] The separation structure mounted on the first mounting frame, the conveying structure mounted on the separation structure, and the sewage treatment structure mounted on the second mounting frame;

[0012] The separation structure is connected to the sewage treatment structure via a conveying structure;

[0013] The separation structure includes: a support component mounted on a first mounting frame, a discharge component mounted on the lower surface of the support component, and a filter component mounted inside the support component;

[0014] The wastewater treatment structure includes: a mounting assembly installed on a second mounting frame, a water pump installed on the upper surface of the mounting assembly, and a stirring assembly installed on the mounting assembly;

[0015] The separation structure is connected to the water pump via a conveying structure, and the stirring end of the stirring component on the mounting assembly extends into the mounting assembly.

[0016] Preferably, the supporting component includes: a supporting tank, a feed inlet installed on the upper surface of the supporting tank, a filling inlet installed on the upper surface of the supporting tank, and a ladder installed on the side surface of the supporting tank;

[0017] The feed inlet is used to connect to the sludge pipe, the addition port is located on one side of the feed inlet, the ladder matches the addition port, and a sealing cover is hinged to the addition port.

[0018] Preferably, the discharge assembly includes: a discharge shell installed on the lower surface of the carrier tank and an electrically controlled gate installed on the discharge shell;

[0019] The lower surface of the carrier tank has a circular opening, the discharge shell is welded to the circular opening, and the electrically controlled gate is located at the discharge port of the discharge shell.

[0020] Preferably, the filter assembly includes: a pair of limiting rails installed in the carrier tank, a detachable bracket installed on the pair of limiting rails, a filter screen installed on the detachable bracket, and a filter cloth installed on the detachable bracket;

[0021] The upper surface of the carrier tank is provided with a first rectangular opening, a pair of limiting rails are installed at the first rectangular opening, the detachable bracket is installed in the carrier tank through the pair of limiting rails, the filter screen and the filter cloth are located on the same detachable bracket, and the filter cloth is located behind the filter screen.

[0022] Preferably, the conveying structure includes: a conveying pipe;

[0023] The conveying pipe is installed on the side surface of the carrier tank, with one end extending into the interior of the carrier tank and close to the bottom of the carrier tank. The other end of the conveying pipe is connected to the water pump.

[0024] Preferably, the mounting assembly includes: a bearing box mounted on the upper surface of the second mounting frame, a feed housing mounted on the upper surface of the bearing box, and a water outlet pipe mounted on the lower end of the side surface of the bearing box;

[0025] The feed housing is located at the rear end of the upper surface of the bearing box, the water outlet pipe is equipped with an electrically controlled valve, and one end of the water pump extends into the bottom of the bearing box.

[0026] Preferably, the stirring assembly includes: a first fixed frame installed at the center of the upper surface of the support box, a drive motor installed on the first fixed frame, a connecting block installed on the rotating end of the drive motor, and a stirring rod installed on the connecting block;

[0027] The stirring rod is located inside the support box.

[0028] Preferably, the second base is equipped with a controller and a mains power interface.

[0029] This utility model has the following beneficial effects:

[0030] This controlled-release greening device for urban wastewater treatment plants can separate sludge with low water content into sludge cakes with low water content and filtrate containing dissolved pollutants. The separated sludge cakes have a lower water content and significantly smaller volume, greatly reducing the burden and cost of subsequent transportation, stabilization treatment, or final disposal. The separated filtrate (wastewater) is directly transported to the wastewater treatment structure through a conveying pipe. Inside the container, the stirring components (drive motor, stirring rod) are combined with the water treatment process to fully mix and react the filtrate, effectively removing pollutants such as organic matter and suspended solids. The effluent pipe is equipped with an electrically controlled valve, and the treated compliant filtrate can be safely reused. The addition port design on the container allows for the precise addition of conditioning agents, stabilizing agents, plant slow-release fertilizer substrates, or heavy metal passivators before, during, or after sludge separation. The structure is relatively simple and easy to use. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 This is a schematic diagram of the structure of a controlled-release greening device for sludge from an urban wastewater treatment plant according to the present invention.

[0033] Figure 2 This is a front view structural diagram of a sludge controlled-release greening device for urban sewage treatment plants according to this utility model;

[0034] Figure 3 This is a front view of a controlled-release greening device for sludge from an urban wastewater treatment plant according to this utility model.

[0035] Figure 4 This is a top view of a controlled-release greening device for sludge from an urban wastewater treatment plant according to the present invention.

[0036] Figure 5 This is a partial schematic diagram of a controlled-release greening device for sludge from an urban sewage treatment plant, according to the present invention.

[0037] The reference numerals in the figure are:

[0038] First base 10, first mounting bracket 11, second base 20, second mounting bracket 21, separation structure 30, conveying structure 40, sewage treatment structure 50, controller 60, mains power interface 70;

[0039] Supporting component 31, discharge component 32, and filter component 33;

[0040] 311, bearing tank; 312, feed inlet; 313, addition port; 314, ladder.

[0041] Discharge housing 321, electrically controlled gate 322;

[0042] Limiting rail 331, detachable bracket 332, filter screen 333, filter cloth 334;

[0043] Conveyor tube 41;

[0044] Component 51, water pump 52, mixing assembly 53;

[0045] 511 bearing housing, 512 feed housing, 513 water outlet pipe;

[0046] First fixed frame 531, drive motor 532, connecting block 533, stirring rod 534. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] Please see Figure 1-5A controlled-release greening device for sludge from an urban wastewater treatment plant includes: a first base 10, a first mounting frame 11 mounted on the upper surface of the first base 10, a second base 20, and a second mounting frame 21 mounted on the upper surface of the second base 20. A certain gap exists between the first base 10 and the second base 20. The device also includes: a separation structure 30 mounted on the first mounting frame 11, a conveying structure 40 mounted on the separation structure 30, and a wastewater treatment structure 50 mounted on the second mounting frame 21. The separation structure 30 and the wastewater treatment structure 50 are connected by the conveying structure 40. The separation structure 30 is connected to the first mounting frame 11, and includes a bearing assembly 31 mounted on the first mounting frame 11, a discharge assembly 32 mounted on the lower surface of the bearing assembly 31, and a filter assembly 33 mounted inside the bearing assembly 31. The sewage treatment structure 50 includes a receiving assembly 51 mounted on the second mounting frame 21, a water pump 52 mounted on the upper surface of the receiving structure, and a stirring assembly 53 mounted on the receiving structure. The separation structure 30 is connected to the water pump 52 through the conveying structure 40, and the stirring end of the stirring assembly 53 on the receiving structure extends into the receiving structure.

[0049] The first base 10 and the second base 20 are horizontally fixed on the concrete floor of the sludge treatment workshop of the sewage treatment plant to facilitate operator access and pipeline connection. The first mounting bracket 11 is fixed to the upper surface of the first base 10 with bolts; the second mounting bracket 21 is fixed to the upper surface of the second base 20 with bolts.

[0050] The carrier assembly 31 includes: a carrier tank 311, a feed inlet 312 installed on the upper surface of the carrier tank 311, an addition port 313 installed on the upper surface of the carrier tank 311, and a ladder 314 installed on the side surface of the carrier tank 311. The feed inlet 312 is used to connect to the sludge pipe. The addition port 313 is located on one side of the feed inlet 312. The ladder 314 matches the addition port 313. A sealing cover is hinged to the addition port 313.

[0051] The supporting tank 311 is a cylindrical stainless steel supporting tank, fixed to the upper surface of the first mounting bracket 11 by a flange. A feed inlet 312 is welded to the top of the tank, and raw sludge with a moisture content of approximately 98% is transported via a pipeline connected to the outlet of the plant's sludge pump. An addition port 313 is provided next to the feed inlet 312, with a welded hinge and a sealing cover plate with a silicone sealing ring installed. A steel ladder 314 is welded to the outside of the tank, leading directly to the addition port 313.

[0052] The discharge assembly 32 includes: a discharge housing 321 installed on the lower surface of the carrier tank 311 and an electrically controlled gate 322 installed on the discharge housing 321. A circular opening is provided on the lower surface of the carrier tank 311, the discharge housing 321 is welded to the circular opening, and the electrically controlled gate 322 is located at the discharge port of the discharge housing 321.

[0053] A circular opening is cut at the center of the bottom of the carrying tank 11. The upper edge of the funnel-shaped discharge shell 321 with a taper of 60° is welded to the opening. An electrically controlled gate 322 pneumatic or electric slide valve is installed at the lower outlet. The signal line of the electrically controlled gate 322 is connected to the controller 60.

[0054] The filter assembly 33 includes: a pair of limiting rails 331 installed in the carrier tank 311, a detachable bracket 332 installed on the pair of limiting rails 331, a filter screen 333 installed on the detachable bracket 332, and a filter cloth 334 installed on the detachable bracket 332. A first rectangular opening is provided on the upper surface of the carrier tank 311, and the pair of limiting rails 331 are installed at the first rectangular opening. The detachable bracket 332 is installed in the carrier tank 311 through the pair of limiting rails 331. The filter screen 333 and the filter cloth 334 are located on the same detachable bracket 332, and the filter cloth 334 is located behind the filter screen 333.

[0055] A first rectangular opening is made at the top of the carrying tank 311. A pair of parallel limiting rails 331 are welded to the inner walls on both sides of the opening. A detachable bracket 332, which is a stainless steel frame, is vertically inserted into the tank along the limiting rails 331 and locked in place at a distance of about 0.3m from the bottom of the tank. A stainless steel filter screen 333 with a 100-mesh aperture is laid on the upper layer of the bracket, and a polyester fiber filter cloth 334 is laid on the lower layer and fixed with a detachable cable tie. The filter cloth 334 is located below the filter screen 333. The flow order is: sludge → filter screen → filter cloth.

[0056] The conveying structure 40 includes a conveying pipe 41, which is installed on the side surface of the carrying tank 311. One end of the conveying pipe 41 extends into the interior of the carrying tank 311 and is close to the bottom of the carrying tank 311. The other end of the conveying pipe 41 is connected to the water pump 52.

[0057] One end of the conveying pipe 41 is welded to the lower side wall of the bearing tank 311. The conveying pipe 41 is a stainless steel pipe with an anti-clogging filter screen at the pipe opening. The other end extends to the top of the second base 20 and is connected to the water pump 52 of the sewage treatment structure 50 through a flange.

[0058] The mounting assembly 51 includes: a bearing housing 511 mounted on the upper surface of the second mounting bracket 21, a feed housing 512 mounted on the upper surface of the bearing housing 511, and a water outlet pipe 513 mounted on the lower end of the side surface of the bearing housing 511. The feed housing 512 is located at the rear end of the upper surface of the bearing housing 511, and the water outlet pipe 513 is equipped with an electrically controlled valve. One end of the water pump 52 extends into the bottom of the bearing housing 511.

[0059] The rectangular support box 511 is fixed to the upper surface of the second mounting bracket 21. The rectangular support box 511 is a 304 stainless steel support box. A funnel-shaped feed housing 512 is welded to the rear end of the box top and connected to the outlet of the conveying pipe 41 through a hose. A water outlet pipe 513 is installed at the lower end of the side wall of the box. An electric control valve is built in and the signal line is connected to the controller 60.

[0060] The stirring assembly 53 includes: a first fixing frame 531 installed at the center of the upper surface of the support box 511, a drive motor 532 installed on the first fixing frame 531, a connecting block 533 installed on the rotating end of the drive motor 532, and a stirring rod 534 installed on the connecting block 533. The stirring rod 534 is located inside the support box 511.

[0061] A first fixed frame 531 is welded to the center of the top of the support box 511, and the drive motor 532 is installed on the fixed frame. The output shaft of the drive motor 532 is connected to the connecting block 533 through a coupling, and the stirring rod 534 below extends into the liquid surface of the box.

[0062] The second base 20 is equipped with a controller 60 and a mains power interface 70.

[0063] A controller 60 (including a PLC control system and a touch screen) and a mains power interface 70 (380VAC) are installed on one side of the second base 20. The controller 14 is connected to each electric actuator through a pre-embedded cable tray.

[0064] Example 1:

[0065] A chemical tank (including a stirrer) is added to the second base 20 to store flocculants (such as PAC) or slow-release agents (such as humic acid solution). The chemical solution is injected into the delivery pipe 41 or directly pumped into the carrier tank 511 via a dosing pump (metering pump). The dosing pump is started and stopped by the controller 60 according to the program.

[0066] Example 2:

[0067] A rotating spray bar is installed on the top of the carrier tank 311 and is started at a time by the controller 60 to backwash the filter cloth 334.

[0068] Example 3:

[0069] The centrifugal water pump 52 is fixed on the top of the support box 511. The water inlet of the water pump 52 extends to the bottom of the box through a suction pipe with a filter screen. The water outlet is divided into two branches: one branch is connected to the feed housing 512 (for circulation and stirring) through a pipe, and the other branch is connected to the reagent dosing system (Example 1).

[0070] When the mains power interface 70 is closed, the controller 60 is powered on. Parameters (such as stirring speed and water pump start / stop cycle) are set via the touch screen. The raw sludge enters the carrier tank 311 through the inlet 312 and undergoes double filtration through the filter screen 333 and filter cloth 334. Solid sludge cake accumulates on one side of the filter cloth 334 (moisture content reduced to ~85%). The filtrate penetrates to the bottom of the tank and is pumped into the carrier tank 511 by the water pump 52 through the transfer pipe 41. The electrically controlled gate 322 opens periodically (e.g., once every 2 hours) to discharge the sludge cake to the collection tank. The vehicle is started by the drive motor 532, and the stirring rod 534 mixes the filtrate. If chemicals are added, the dosing pump adds them simultaneously. The stirring time is 30 minutes. The treated supernatant is discharged through the outlet pipe 513 (the electric control valve opens automatically) and used for irrigation of the factory area or for discharge that meets standards. During maintenance, the sealing cover of the addition port 313 can be opened through the ladder 314 to add solid slow-release materials (such as zeolite powder). The detachable bracket 332 can be lifted periodically to clean / replace the filter screen 333 and filter cloth 334, which is very convenient.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A controlled-release greening device for sludge from urban wastewater treatment plants, comprising: A first base (10), a first mounting bracket (11) mounted on the upper surface of the first base (10), a second base (20), and a second mounting bracket (21) mounted on the upper surface of the second base (20); There is a certain gap between the first base (10) and the second base (20); Its characteristic is that it further includes: Separation structure (30) mounted on the first mounting frame (11), conveying structure (40) mounted on the separation structure (30), and sewage treatment structure (50) mounted on the second mounting frame (21); The separation structure (30) is connected to the sewage treatment structure (50) via a conveying structure (40); The separation structure (30) includes: a support assembly (31) mounted on a first mounting frame (11), a discharge assembly (32) mounted on the lower surface of the support assembly (31), and a filter assembly (33) mounted inside the support assembly (31); The wastewater treatment structure (50) includes: a mounting assembly (51) mounted on a second mounting frame (21), a water pump (52) mounted on the upper surface of the mounting assembly (51), and a stirring assembly (53) mounted on the mounting assembly (51); The separation structure (30) is connected to the water pump (52) through the conveying structure (40), and the stirring end of the stirring component (53) on the housing assembly (51) extends into the housing assembly (51).

2. The controlled-release greening device for sludge from urban wastewater treatment plants according to claim 1, characterized in that, The bearing assembly (31) includes: a bearing tank (311), a feed inlet (312) installed on the upper surface of the bearing tank (311), a filling inlet (313) installed on the upper surface of the bearing tank (311), and a ladder (314) installed on the side surface of the bearing tank (311); The feed inlet (312) is used to connect to the sludge pipe, the addition port (313) is located on one side of the feed inlet (312), the ladder (314) is matched with the addition port (313), and a sealing cover is hinged to the addition port (313).

3. The controlled-release greening device for sludge from urban wastewater treatment plants according to claim 2, characterized in that, The discharge assembly (32) includes: a discharge housing (321) installed on the lower surface of the carrier tank (311) and an electrically controlled gate (322) installed on the discharge housing (321); The lower surface of the bearing tank (311) is provided with a circular opening, the discharge shell (321) is welded to the circular opening, and the electrically controlled gate (322) is located at the discharge port of the discharge shell (321).

4. A controlled-release greening device for sludge from urban wastewater treatment plants according to claim 3, characterized in that, The filter assembly (33) includes: a pair of limiting rails (331) installed in the carrier tank (311), a detachable bracket (332) installed on the pair of limiting rails (331), a filter screen (333) installed on the detachable bracket (332), and a filter cloth (334) installed on the detachable bracket (332); The upper surface of the carrier tank (311) is provided with a first rectangular opening, and a pair of limiting rails (331) are installed at the first rectangular opening. The detachable bracket (332) is installed inside the carrier tank (311) through a pair of limiting rails (331). The filter screen (333) and the filter cloth (334) are located on the same detachable bracket (332), and the filter cloth (334) is located behind the filter screen (333).

5. A controlled-release greening device for sludge from urban wastewater treatment plants according to claim 3, characterized in that, The transmission structure (40) includes: a transmission tube (41); The transmission pipe (41) is installed on the side surface of the carrier tank (311). One end of the transmission pipe (41) extends into the interior of the carrier tank (311) and is close to the bottom of the carrier tank (311). The other end of the transmission pipe (41) is connected to the water pump (52).

6. The controlled-release greening device for sludge from urban wastewater treatment plants according to claim 1, characterized in that, The mounting assembly (51) includes: a bearing box (511) mounted on the upper surface of the second mounting frame (21), a feed housing (512) mounted on the upper surface of the bearing box (511), and a water outlet pipe (513) mounted on the lower end of the side surface of the bearing box (511). The feed housing (512) is located at the rear end of the upper surface of the bearing box (511), the water outlet pipe (513) is equipped with an electrically controlled valve, and one end of the water pump (52) extends into the bottom of the bearing box (511).

7. A controlled-release greening device for sludge from urban wastewater treatment plants according to claim 6, characterized in that, The stirring assembly (53) includes: a first fixed frame (531) installed at the center of the upper surface of the support box (511), a drive motor (532) installed on the first fixed frame (531), a connecting block (533) installed on the rotating end of the drive motor (532), and a stirring rod (534) installed on the connecting block (533); The stirring rod (534) is located inside the support box (511).

8. A controlled-release greening device for sludge from urban wastewater treatment plants according to claim 1, characterized in that, The second base (20) is provided with a controller (60) and a mains power interface (70).

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