Sludge solidification treatment device

Abstract

The utility model relates to sludge treatment technical field especially is a kind of sludge solidification treatment device, it includes sludge treatment main part and auxiliary adjusting assembly.Sludge treatment main part contains mixing cavity, solid-liquid separation module and solidification agent adding module, auxiliary adjusting assembly includes pressure regulating mechanism and cleaning maintenance mechanism.Solid-liquid separation module uses multiple layers annular filter screen and telescopic pressure plate to optimize pressure distribution, pressure regulating mechanism adjusts pressure dynamically through air bag assembly, and cleaning maintenance mechanism removes residual material using scraper and spraying assembly.The utility model sets up multiple layers annular filter screen and telescopic pressure plate, optimizes the pressure distribution in solid-liquid separation process, avoids the filter screen blockage problem caused by high viscosity sludge, improves dehydration efficiency, and the air bag assembly in pressure regulating mechanism can adjust pressure dynamically according to sludge characteristics, enhances the adaptability of device to different moisture content sludge.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection and solid waste treatment technology, specifically a sludge solidification treatment device. Background Technology

[0002] With the acceleration of urbanization and the continuous increase in sewage treatment volume, sludge treatment has become an important issue in the field of environmental protection. Sludge solidification treatment, as an important means to achieve sludge reduction, stabilization, and resource utilization, has been widely studied and applied in recent years. However, in practical engineering, existing sludge solidification devices still have certain limitations in terms of structural design, automation level, and ease of maintenance, affecting their further promotion and application.

[0003] For example, a Chinese invention patent (publication number: CN103288329B, authorization announcement date: June 4, 2014) discloses a "sludge solidification treatment system," which includes a sludge collection silo, a solidifying agent supply device, a mixer, and a discharge silo. These components are connected by a conveying device to achieve the mixing and conveying of sludge and solidifying agent. The advantages of this system are smooth feeding and good mixing uniformity, but it occupies a large area, and the control of the solidifying agent addition ratio relies on manual operation, making it difficult to adapt to the high-efficiency treatment needs of sludge with different moisture contents.

[0004] Another Chinese invention patent (publication number: CN116282811B, authorization announcement date: December 1, 2023) discloses a "sewage sludge solidification treatment device," which uses a combination of multi-layer filters and an extrusion device to achieve integrated sludge dewatering and solidification. The advantages of this device are its compact structure, ease of operation, and suitability for on-site treatment of domestic sewage sludge. However, it suffers from unstable dewatering efficiency when treating high-viscosity sludge, and the filters are prone to clogging, making cleaning and maintenance difficult after long-term use and increasing operating costs.

[0005] Therefore, there is an urgent need to develop a new type of sludge solidification treatment device that can improve treatment efficiency, enhance automation and maintenance convenience, and meet the current diverse, efficient and intelligent sludge treatment needs. Utility Model Content

[0006] The purpose of this invention is to solve the problems of complex structural design, insufficient automation and poor maintenance of existing sludge solidification treatment devices, while improving the adaptability and dewatering efficiency of sludge with different moisture contents.

[0007] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a sludge solidification treatment device, comprising a sludge treatment body and auxiliary adjustment components. The sludge treatment body includes a mixing chamber, a solid-liquid separation module, and a solidifying agent addition module. The mixing chamber has an inlet at the top and an outlet at the bottom. The solid-liquid separation module is located in the middle section of the mixing chamber, and the solidifying agent addition module is connected to the mixing chamber via a pipe. The auxiliary adjustment components include a pressure regulating mechanism and a cleaning and maintenance mechanism. The pressure regulating mechanism is installed outside the solid-liquid separation module and is used to dynamically adjust the pressure distribution during the separation process. The cleaning and maintenance mechanism is located inside the solid-liquid separation module and is used to remove residues from the filter screen surface.

[0008] The solid-liquid separation module includes a multi-layer annular filter and an extrusion assembly. The multi-layer annular filter is nested sequentially from the outside to the inside, with gap channels formed between adjacent layers. The extrusion assembly is located at the center of the innermost filter layer. The extrusion assembly includes a hydraulic drive and a retractable pressure plate. The hydraulic drive is fixed to the top of the mixing chamber, and its output end is connected to the retractable pressure plate. The bottom surface of the retractable pressure plate has several conical protrusions to disperse pressure during the extrusion process and prevent filter clogging.

[0009] As a preferred embodiment of this invention, the pressure regulating mechanism includes an airbag assembly and a pressure sensor. The airbag assembly is arranged around the outer wall of the solid-liquid separation module, and the pressure sensor is installed inside the airbag assembly to monitor changes in pressure within the airbag in real time. The airbag assembly is connected to an external air pump via an inflation pipe, which is equipped with a solenoid valve to automatically adjust the amount of gas inside the airbag based on data from the pressure sensor.

[0010] As a preferred embodiment of this invention, the cleaning and maintenance mechanism includes a scraper assembly and a spray assembly. The scraper assembly comprises multiple arc-shaped scrapers evenly distributed along the circumferential inner wall of the filter screen. One end of each arc-shaped scraper is connected to the filter screen via a spring hinge, and the other end is provided with a wear-resistant rubber strip for adhering to the filter screen surface for cleaning. The spray assembly includes several nozzles mounted above the filter screen and connected to an external water source via a water supply pipeline for periodically rinsing the filter screen surface.

[0011] As a preferred embodiment of this invention, the curing agent addition module includes a storage silo, a metering pump, and a stirrer. The storage silo is connected to the metering pump via a delivery pipe, and the outlet of the metering pump is connected to a mixing chamber. The stirrer is located inside the mixing chamber, near the curing agent inlet, and is used to thoroughly mix the curing agent with the sludge. The flow control unit of the metering pump is connected to a humidity sensor inside the mixing chamber to automatically adjust the amount of curing agent added based on the moisture content of the sludge.

[0012] As a preferred embodiment of this invention, the inner wall of the mixing chamber is provided with a heating layer, which is composed of heating wires and is used to preheat the sludge in a low-temperature environment to accelerate the solidification reaction. The outer side of the heating layer is covered with insulation material to reduce heat loss.

[0013] As a preferred embodiment of this invention, a crushing assembly is provided at the feed inlet. The crushing assembly includes rotating blades and a drive motor. The rotating blades are connected to the drive motor via a shaft and are used to crush large pieces of sludge into small particles for easier subsequent processing. A guide plate is provided below the feed inlet, and the guide plate is inclined to guide the sludge into the mixing chamber evenly.

[0014] As a preferred embodiment of this invention, a screening plate is provided at the discharge port, and the surface of the screening plate has several sieve holes for classifying the solidified sludge according to particle size. A collection trough is provided below the screening plate, and the collection trough is connected to the mixing chamber via a slide rail for easy removal and replacement.

[0015] As a preferred embodiment of this invention, an observation window is provided on the outer side of the mixing chamber. The observation window is made of a transparent and corrosion-resistant material and is used to monitor the internal working status in real time. A sealing ring is provided at the edge of the observation window to prevent sludge leakage.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. By setting up a multi-layer annular filter screen and a retractable pressure plate, the pressure distribution during the solid-liquid separation process is optimized, avoiding the filter screen clogging problem caused by high-viscosity sludge and improving dewatering efficiency;

[0018] 2. The airbag assembly in the pressure regulating mechanism can dynamically adjust the pressure according to the characteristics of the sludge, enhancing the adaptability of the device to sludge with different moisture contents.

[0019] 3. The scraper assembly and spray assembly in the cleaning and maintenance mechanism work together to effectively remove residues from the filter surface and reduce operation and maintenance costs;

[0020] 4. The curing agent addition module, combined with a humidity sensor, enables precise dispensing of the curing agent, reducing manual intervention and improving the level of automation;

[0021] 5. The design of the heating layer solves the problem of slow curing reaction at low temperatures, further improving processing efficiency;

[0022] 6. The application of crushing components and screening plates improves the working effect of the feeding and discharging stages, making the entire device more efficient and stable.

[0023] In summary, this utility model significantly improves the performance of the sludge solidification treatment device through various technological innovations, meeting the current diverse, efficient, and intelligent needs for sludge treatment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall external structure of the sludge solidification treatment device according to an embodiment of the present utility model;

[0026] Figure 2 This is a structural diagram of the internal structure of the mixing cavity according to an embodiment of the present invention;

[0027] Figure 3 This is a structural diagram of the extrusion assembly according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the solid-liquid separation module and the curing agent addition module according to an embodiment of the present invention;

[0029] Figure 5 This is a structural diagram of the crushing component according to an embodiment of the present utility model.

[0030] In the picture:

[0031] 1. Mixing chamber; 2. Solid-liquid separation module; 3. Curing agent addition module; 4. Multi-layer annular filter; 5. Extrusion assembly; 6. Hydraulic drive component; 7. Telescopic pressure plate; 8. Airbag assembly; 9. Pressure sensor; 10. Scraper assembly; 11. Spray assembly; 12. Storage silo; 13. Metering pump; 14. Agitator; 15. Heating layer; 16. Crushing assembly; 17. Screening plate. Detailed Implementation

[0032] 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.

[0033] This utility model provides a sludge solidification treatment device. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. The sludge solidification treatment device includes a sludge treatment main body and auxiliary adjustment components. The sludge treatment main body consists of a mixing chamber 1, a solid-liquid separation module 2, and a solidifying agent addition module 3. The auxiliary adjustment components include a pressure adjustment mechanism and a cleaning and maintenance mechanism. The connection relationships, positional relationships, and mutual cooperation relationships between the various components will be described in detail below.

[0034] The mixing chamber 1 is the core component for sludge solidification treatment, with an inlet at the top and an outlet at the bottom. A crushing assembly 16 is installed at the inlet, comprising rotating blades and a drive motor. The rotating blades are connected to the drive motor via a shaft. The drive motor is fixed to the outer wall of the mixing chamber 1, and the shaft passes through the side wall and is fixedly connected to the rotating blades. A guide plate is located below the inlet, angled and welded to the inner wall of the mixing chamber 1, to uniformly guide the chopped sludge into the mixing chamber 1. A heating layer 15, composed of heating wires, is installed on the inner wall of the mixing chamber 1, connected to an external power source via wires. The outer side of the heating layer 15 is covered with insulation material, directly bonded to the outer wall of the mixing chamber 1 to reduce heat loss. An observation window, made of transparent, corrosion-resistant material, is also provided on the outer side of the mixing chamber 1, its edges embedded with a sealing ring and fixed to the side wall of the mixing chamber 1 with bolts.

[0035] The solid-liquid separation module 2 is located in the middle section inside the mixing chamber 1. The solid-liquid separation module 2 includes multiple annular filters 4 and an extrusion assembly 5. The multiple annular filters 4 are nested sequentially from the outside to the inside, forming gap channels between adjacent layers. Each filter layer is fixedly connected to the inner wall of the mixing chamber 1 via a bracket, which is secured to the inner wall of the mixing chamber 1 with bolts. The extrusion assembly 5 is located at the center of the innermost filter layer and includes a hydraulic drive 6 and a retractable pressure plate 7. The hydraulic drive 6 is fixed to the top of the mixing chamber 1, and its output end is connected to the retractable pressure plate 7 via a threaded connection. The bottom surface of the retractable pressure plate 7 has several conical protrusions, which are fixed to the surface of the retractable pressure plate 7 by welding to distribute pressure and prevent filter clogging. The hydraulic drive 6 is connected to an external hydraulic station via hydraulic pipelines, and solenoid valves are installed on the hydraulic pipelines to control the working state of the hydraulic drive 6.

[0036] The pressure regulating mechanism is installed on the outside of the solid-liquid separation module 2. The mechanism includes an airbag assembly 8 and a pressure sensor 9. The airbag assembly 8 is arranged around the outer wall of the solid-liquid separation module 2 and is fixed to the outer wall of the module 2 with adhesive. The pressure sensor 9 is installed inside the airbag assembly 8 and is fixed to the inner wall of the airbag assembly 8 with screws, and is connected to an external control system via a signal line. The airbag assembly 8 is connected to an external air pump via an inflation line. A solenoid valve is installed on the inflation line and is fixed to the inflation line with bolts. This solenoid valve is used to automatically adjust the amount of gas inside the airbag based on the data fed back by the pressure sensor 9.

[0037] The cleaning and maintenance mechanism is located inside the solid-liquid separation module 2. The mechanism includes a scraper assembly 10 and a spray assembly 11. The scraper assembly 10 includes multiple arc-shaped scrapers evenly distributed along the circumference of the inner wall of the filter screen. One end of each arc-shaped scraper is connected to the filter screen via a spring hinge, and the other end is equipped with a wear-resistant rubber strip. The wear-resistant rubber strip is glued to the end of the arc-shaped scraper for cleaning the filter screen surface. The spray assembly 11 includes several nozzles mounted above the filter screen. The nozzles are threadedly fixed to a water supply pipeline, which is connected to an external water source via clamps for periodically rinsing the filter screen surface.

[0038] The curing agent addition module 3 is connected to the mixing chamber 1 via a pipeline. The curing agent addition module 3 includes a storage silo 12, a metering pump 13, and a stirrer 14. The storage silo 12 is connected to the metering pump 13 via a delivery pipeline, which is fixedly connected to both the storage silo 12 and the metering pump 13 via a flange. The outlet end of the metering pump 13 is connected to the mixing chamber 1 via a pipeline, which is fixed to the side wall of the mixing chamber 1 by clamps. The stirrer 14 is located inside the mixing chamber 1, near the curing agent inlet. The stirrer 14 is connected to a drive motor via a shaft, which is fixed to the outer side wall of the mixing chamber 1. The shaft passes through the side wall of the mixing chamber 1 and is fixedly connected to the stirrer 14. The flow control unit of the metering pump 13 is connected to a humidity sensor inside the mixing chamber 1 via a signal line to automatically adjust the amount of curing agent added based on the moisture content of the sludge.

[0039] A screening plate 17 is provided at the discharge port of the mixing chamber 1. The surface of the screening plate 17 has several screen holes, and the screening plate 17 is fixed to the bottom of the mixing chamber 1 by bolts. A collection trough is provided below the screening plate 17, and the collection trough is connected to the mixing chamber 1 by a slide rail. The slide rail is fixed to the bottom of the mixing chamber 1 by bolts, which facilitates removal and replacement.

[0040] In actual operation, sludge enters the mixing chamber 1 through the feed inlet. After being shredded into small particles by the rotating blades of the crushing component 16, it is evenly distributed into the mixing chamber 1 by the guide plate. The heating layer 15 preheats the sludge in a low-temperature environment to accelerate the solidification reaction. Subsequently, the sludge enters the solid-liquid separation module 2. The multi-layer annular filter screen 4 achieves step-by-step filtration of the sludge through gap channels. The hydraulic drive component 6 of the extrusion component 5 pushes the retractable pressure plate 7 downward, and the conical protrusion applies dispersive pressure to the sludge to prevent filter screen blockage. The airbag component 8 in the pressure regulating mechanism dynamically adjusts the pressure distribution based on the data fed back by the pressure sensor 9 to ensure adaptability to sludge with different moisture contents. The scraper component 10 in the cleaning and maintenance mechanism uses the elasticity of the spring hinge to make the wear-resistant rubber strip adhere to the filter screen surface for cleaning. The spray component 11 uses the spray nozzle to periodically rinse the filter screen surface to remove residues. The storage silo 12 in the solidifying agent addition module 3 stores the solidifying agent. The metering pump 13 accurately controls the amount of solidifying agent added based on the signal from the humidity sensor. The agitator 14 thoroughly mixes the solidifying agent with the sludge. The solidified sludge is then graded by particle size through screening plate 17 and falls into collection tank to complete the treatment process.

[0041] To enable those skilled in the art to fully understand and implement this utility model, the operating principle and implementation steps of the sludge solidification treatment device are described in detail below with reference to a specific application scenario.

[0042] In practical applications of sludge solidification treatment, sludge with a high moisture content is first conveyed to the inlet of mixing chamber 1 via a conveying device. After the sludge enters mixing chamber 1, the drive motor of the crushing component 16 starts, driving the rotating blades to rotate at high speed, chopping large pieces of sludge into small particles. The chopped sludge is evenly distributed inside mixing chamber 1 under the action of the guide plate, ensuring the stability of subsequent processing. At this time, the heating wire in the heating layer 15 is energized and heats up, providing a preheating environment for the sludge in mixing chamber 1 to accelerate the start of the solidification reaction. This preheating process is particularly suitable for operation in low-temperature environments. By covering with insulation material, heat loss can be effectively reduced, thereby improving energy utilization efficiency.

[0043] Subsequently, the pre-treated sludge enters the solid-liquid separation module 2. Multi-layer annular filters 4 achieve solid-liquid separation of the sludge through intermittent channels. The outer filter layer primarily filters larger particles and impurities, while the inner filter layer further separates fine particles from the liquid. During this process, the hydraulic drive unit 6 pushes the retractable pressure plate 7 downwards, applying pressure to promote sludge dewatering. The conical protrusion design on the bottom of the retractable pressure plate 7 disperses pressure, preventing filter clogging due to excessive local pressure. Simultaneously, the airbag assembly 8 in the pressure regulating mechanism dynamically adjusts the amount of gas inside the airbag based on the pressure value monitored in real time by the pressure sensor 9, ensuring the separation process adapts to sludge with different moisture contents. This dynamic adjustment mechanism significantly improves the device's adaptability to complex sludge characteristics.

[0044] In the solid-liquid separation process, the cleaning and maintenance mechanism plays a crucial role. The scraper assembly 10, through the elastic action of a spring hinge, ensures that the wear-resistant rubber strips on the arc-shaped scraper remain in constant contact with the filter screen surface, promptly removing residues. Simultaneously, the spray assembly 11's nozzles periodically spray cleaning fluid onto the filter screen surface, further removing stubborn residues, preventing filter clogging, and reducing maintenance frequency. This collaborative cleaning mechanism not only ensures the long-term efficient operation of the filter screen but also reduces the workload of manual maintenance.

[0045] Simultaneously with sludge dewatering, the solidifying agent addition module 3 begins operation. The solidifying agent in storage silo 12 is delivered to metering pump 13 via a conveying pipeline. Metering pump 13 precisely controls the amount of solidifying agent added based on signals from the humidity sensor within mixing chamber 1. Agitator 14 then starts, rotating the mixing blades via a shaft to thoroughly mix the solidifying agent with the sludge, ensuring a uniform solidification reaction. This automated addition and mixing process significantly improves the utilization rate of the solidifying agent and reduces the need for manual intervention.

[0046] Finally, the solidified sludge undergoes particle size classification via screening plate 17. The sieve openings on screening plate 17 filter sludge particles according to their size; larger particles are intercepted on screening plate 17, while smaller particles fall into the collection trough below. The collection trough is connected by a sliding rail, allowing operators to easily remove and replace it for subsequent processing or resource utilization. The entire process can be monitored in real time through an observation window. The transparent, corrosion-resistant observation window ensures operators can clearly understand the internal working status, while the sealing ring design effectively prevents sludge leakage.

[0047] In summary, this invention achieves complete sludge treatment from feeding, crushing, preheating, solid-liquid separation, and addition of solidifying agent to final screening through the above steps. The coordinated operation between modules and the automated control mechanism give the device significant advantages in processing efficiency, adaptability, and ease of maintenance, meeting the current demands for high efficiency and intelligence in the sludge treatment field.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sludge solidification treatment device, characterized in that, The sludge treatment system includes a sludge treatment main body and an auxiliary adjustment component. The sludge treatment main body includes a mixing chamber (1), a solid-liquid separation module (2), and a solidifying agent addition module (3). The mixing chamber (1) has an inlet at the top and an outlet at the bottom. The solid-liquid separation module (2) is located in the middle section inside the mixing chamber (1). The solidifying agent addition module (3) is connected to the mixing chamber (1) through a pipe. The auxiliary adjustment component includes a pressure adjustment mechanism and a cleaning and maintenance mechanism. The pressure adjustment mechanism is installed on the outside of the solid-liquid separation module (2), and the cleaning and maintenance mechanism is located on the inside of the solid-liquid separation module (2).

2. The sludge solidification treatment device according to claim 1, characterized in that, The solid-liquid separation module (2) includes a multi-layer annular filter (4) and an extrusion assembly (5). The multi-layer annular filter (4) is nested from the outside to the inside, and a gap channel is formed between two adjacent filter layers. The extrusion assembly (5) is located at the center of the innermost filter layer. The extrusion assembly (5) includes a hydraulic drive (6) and a retractable pressure plate (7). The hydraulic drive (6) is fixed to the top of the mixing chamber (1), and its output end is connected to the retractable pressure plate (7). The bottom surface of the retractable pressure plate (7) is provided with several conical protrusions.

3. The sludge solidification treatment device according to claim 2, characterized in that, The pressure regulating mechanism includes an airbag assembly (8) and a pressure sensor (9). The airbag assembly (8) is arranged around the outer wall of the solid-liquid separation module (2). The pressure sensor (9) is installed inside the airbag assembly (8). The airbag assembly (8) is connected to an external air pump through an inflation pipeline. The inflation pipeline is equipped with a solenoid valve.

4. The sludge solidification treatment device according to claim 3, characterized in that, The cleaning and maintenance mechanism includes a scraper assembly (10) and a spray assembly (11). The scraper assembly (10) includes multiple arc-shaped scrapers, which are evenly distributed along the inner wall of the filter screen. One end of each arc-shaped scraper is connected to the filter screen via a spring hinge, and the other end is provided with a wear-resistant rubber strip. The spray assembly (11) includes several nozzles, which are installed above the filter screen and connected to an external water source via a water supply pipeline.

5. The sludge solidification treatment device according to claim 1, characterized in that, The curing agent addition module (3) includes a storage silo (12), a metering pump (13) and a stirrer (14). The storage silo (12) is connected to the metering pump (13) through a delivery pipe. The outlet end of the metering pump (13) is connected to the mixing chamber (1). The stirrer (14) is located inside the mixing chamber (1) near the curing agent inlet. The flow control unit of the metering pump (13) is connected to the humidity sensor signal inside the mixing chamber (1).

6. The sludge solidification treatment device according to claim 1, characterized in that, The inner wall of the mixing chamber (1) is provided with a heating layer (15), which is made of heating wire, and the outer side of the heating layer (15) is covered with heat insulation material.

7. The sludge solidification treatment device according to claim 1, characterized in that, The feed inlet is provided with a crushing component (16), which includes a rotating blade and a drive motor. The rotating blade is connected to the drive motor via a shaft. A guide plate is provided below the feed inlet, and the guide plate is inclined.

8. The sludge solidification treatment device according to claim 1, characterized in that, A screening plate (17) is provided at the discharge port. The surface of the screening plate (17) is provided with a number of screen holes. A collection trough is provided below the screening plate (17). The collection trough is connected to the mixing chamber (1) through a slide rail.

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