A sludge treatment plant containing 60% water
By designing sludge treatment devices with sludge storage tanks, crushing structures, conveying structures, and co-firing structures, and by adopting a twin-shaft shear crusher and high-temperature zone back spray combustion, the problems of high cost and equipment wear have been solved, achieving efficient and stable sludge treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DYNAGREEN ENVIRONMENTAL PROTECTION GROUP
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-10
AI Technical Summary
Existing sludge treatment equipment is expensive and involves many steps. In particular, sludge with a water content of 60% is difficult to incinerate directly. Furthermore, traditional drying equipment requires large investments, has high operating costs, and generates waste liquid, wastewater, and odor, resulting in severe equipment wear.
Design a sludge treatment device with a water content of 60%, including a sludge storage tank, a crushing structure, a conveying structure and a co-firing structure. It adopts a twin-shaft shear crusher and a sprayer, uses special serrated blades to crush the sludge, and transports it to the incinerator through compressed gas. A return spray gun is set at the return spray port in the high-temperature zone for atomized combustion.
It reduces equipment investment and operating costs, reduces wastewater and odor generation, improves incineration stability, extends equipment life, and achieves efficient and continuous sludge treatment.
Smart Images
Figure CN224479637U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sludge treatment technology, and in particular to a sludge treatment device with a water content of 60%. Background Technology
[0002] With the continuous expansion of urban sewage treatment scale, the amount of sludge generated during sewage treatment is also increasing. Sewage treatment plants reduce the moisture content of sludge with an 80% water content to 60% using methods such as plate and frame filter presses before sending it for external treatment. Incineration has advantages such as high volume reduction and thorough harmlessness, and is gradually becoming one of the mainstream methods for sludge treatment.
[0003] However, sludge incineration faces numerous challenges. Sludge with a water content of 60% is particularly problematic, as it is characterized by high water content, high viscosity, and contains large amounts of organic matter, pathogens, and heavy metals, making direct incineration difficult. Traditional treatment methods typically require deep dewatering of the sludge to reduce its water content to a certain level before incineration. This not only increases treatment costs but also generates significant amounts of wastewater during dewatering, requiring further treatment. The mainstream co-processing technology for sludge in existing waste-to-energy plants uses disc or paddle dryers to indirectly dry the sludge with steam before sending it to the incinerator for high-temperature treatment. The disadvantages include high investment and operating costs, as well as the need to treat wastewater and odor generated during the drying process. Furthermore, the dried sludge fed into the grate via the feed hopper increases the mechanical load on the grate and increases wear on its mechanical structure, leading to unstable combustion and equipment blockage. Summary of the Invention
[0004] This invention provides a sludge treatment device with a water content of 60%, which aims to solve the problems of high cost and numerous subsequent treatment steps in existing sludge treatment devices.
[0005] This utility model provides a sludge treatment device with a water content of 60%, including a sludge storage tank, a sludge crushing structure, a sludge conveying structure, and a sludge co-firing structure. The sludge crushing structure is disposed in the sludge storage tank. The discharge port of the sludge storage tank is connected to the input end of the sludge conveying structure, and the output end of the sludge conveying structure is connected to the sludge co-firing structure. The sludge crushing structure crushes the lumpy sludge, and the sludge conveying structure transports the crushed sludge particles to the return spray port of the sludge co-firing structure.
[0006] As a further improvement of this utility model, the sludge crushing structure includes a base, a first crushing motor, a second crushing motor, a first serrated blade, and a second serrated blade. The base is disposed in the sludge storage tank. The first crushing motor and the second crushing motor are disposed facing each other on the base. The output end of the first crushing motor is connected to a first rotating shaft, and the output end of the second crushing motor is connected to a second rotating shaft. The first serrated blade is disposed on the first rotating shaft, and the second serrated blade is disposed on the second rotating shaft.
[0007] As a further improvement of this utility model, the first serrated blade extends outward from the center of the first rotating shaft, and a gap is left between adjacent first serrated blades; the second serrated blade extends outward from the center of the second rotating shaft, and a gap is left between adjacent second serrated blades.
[0008] As a further improvement of this utility model, the first rotating shaft and the second rotating shaft are arranged parallel to each other. During the crushing operation, the first serrated blade passes through the gap between the second serrated blades, and the second serrated blade passes through the gap between the first serrated blades.
[0009] As a further improvement of this utility model, the base is also provided with a sprayer, which sprays surfactant onto the positions of the first serrated blade and the second serrated blade.
[0010] As a further improvement of this utility model, the sludge conveying structure includes a sludge conveying tank, a conveying pipeline, and several pressure sensors. The inlet of the sludge conveying tank is connected to the outlet of the sludge storage tank. One end of the conveying pipeline is connected to the outlet of the sludge conveying tank, and the other end of the conveying pipeline is connected to the sludge co-firing structure. The conveying pipeline uses compressed gas to convey the crushed sludge particles. Several pressure sensors are installed at the inlet and outlet of the conveying pipeline.
[0011] As a further improvement of this utility model, the sludge conveying tank is provided with a feed valve at the inlet and a discharge valve at the outlet.
[0012] As a further improvement of this utility model, the sludge co-firing structure includes an incinerator, a temperature sensor for detecting the temperature inside the furnace, and an oxygen sensor for detecting the oxygen content inside the furnace. The incinerator is provided with the return nozzle, which is connected to the sludge conveying structure. The temperature sensor and the oxygen sensor are installed inside the incinerator and communicate with the sludge conveying structure.
[0013] As a further improvement of this utility model, the return nozzle is located in the high-temperature zone between the auxiliary burner and the secondary air inlet of the incinerator.
[0014] As a further improvement of this utility model, a return spray gun is provided at the return spray port.
[0015] The beneficial effects of this invention are: the device reduces wastewater and odor pollution generated during the process, does not require steam consumption, greatly reduces equipment investment, and the atomized sludge particles are sprayed into the furnace for more complete and stable combustion, reducing wear on the grate equipment and ensuring continuous, efficient and long-term operation. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the processing device of this utility model;
[0017] Figure 2 This is a schematic diagram of the sludge crushing structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the sludge transfer structure of this utility model.
[0019] Figure descriptions: 1-Sludge storage tank, 2-Sludge crushing structure, 3-Sludge conveying tank, 4-Feed valve, 5-Discharge valve, 6-Pressure sensor, 7-Transmission pipeline, 8-Return spray gun, 9-Incinerator, 21-Base, 22-First crushing motor, 23-Second crushing motor, 24-First rotating shaft, 25-First serrated blade, 26-Second rotating shaft, 27-Second serrated blade. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.
[0021] This invention provides a sludge treatment device with a water content of 60%, comprising a sludge storage tank 1, a sludge crushing structure 2, a sludge conveying structure, and a sludge co-firing structure. The sludge crushing structure 2 is disposed in the sludge storage tank 1. The outlet of the sludge storage tank 1 is connected to the input end of the sludge conveying structure, and the output end of the sludge conveying structure is connected to the sludge co-firing structure. The sludge crushing structure 2 crushes the lumpy sludge, and the sludge conveying structure transports the crushed sludge particles to the return nozzle of the sludge co-firing structure. The entire technical solution achieves integrated treatment of sludge with a water content of 60%, including crushing, conveying, and incineration, simplifying the process flow, reducing treatment costs, and demonstrating significant economic and environmental benefits.
[0022] In one embodiment of this utility model, the sludge crushing structure 2 includes a base 21, a first crushing motor 22, a second crushing motor 23, a first serrated blade 25, and a second serrated blade 27. The base 21 is disposed in the sludge storage tank 1. The first crushing motor 22 and the second crushing motor 23 are disposed facing each other on the base 21. The output end of the first crushing motor 22 is connected to a first rotating shaft 24, and the output end of the second crushing motor 23 is connected to a second rotating shaft 26. The first serrated blade 25 is disposed on the first rotating shaft 24, and the second serrated blade 27 is disposed on the second rotating shaft 26. 27 is disposed on the second rotating shaft 26; the first serrated blade 25 extends outward from the center of the first rotating shaft 24, and a gap is left between adjacent first serrated blades 25; the second serrated blade 27 extends outward from the center of the second rotating shaft 26, and a gap is left between adjacent second serrated blades 27; the first rotating shaft 24 and the second rotating shaft 26 are arranged parallel to each other; during the crushing operation, the first serrated blade 25 passes through the gap between the second serrated blades 27, and the second serrated blade 27 passes through the gap between the first serrated blades 25.
[0023] During the crushing operation, after the first crushing motor 22 and the second crushing motor 23 are started, the first rotating shaft 24 and the second rotating shaft 26 rotate, driving the first serrated blade 25 and the second serrated blade 27 to rotate. When they meet, they will pass through the gap between each other. In this way, when the lumpy sludge falls to the intersection of the first serrated blade 25 and the second serrated blade 27, it will be cut into particles that can pass through the very small gap, thus achieving the effect of crushing the lumpy sludge.
[0024] In another embodiment of this utility model, a sprayer is also provided on the base 21, which sprays surfactant onto the positions of the first serrated blade 25 and the second serrated blade 27. During the crushing process, an appropriate amount of surfactant is sprayed into the sludge through the sprayer to improve the crushing effect. The surfactant is mainly an alkaline component such as quicklime, which can reduce the stickiness of the sludge.
[0025] The sludge crushing structure 2 employs a biaxial shear crusher. The first serrated blade 25 and the second serrated blade 27 are designed with a special serrated shape. Since the sludge with 60% water content originates from sludge with 80% water content produced by wastewater treatment plants, the water content is reduced to approximately 60% by adding flocculants and other agents and using a plate and frame filter press. The sludge is highly viscous and prone to clumping. Existing biaxial shear crushers use scissor-shaped blades, which are ineffective at crushing highly viscous sludge with 60% water content. Therefore, this solution uses special serrated blades, which are more effective at crushing sludge with 60% water content and clumped together. The crushed sludge is then more readily conveyed pneumatically into the incinerator 9 for high-temperature combustion, effectively crushing highly viscous sludge with 60% water content. The blades are made of high-strength, corrosion-resistant alloy materials, ensuring a long service life. The feed inlet of the sludge crushing structure 2 adopts a special sealing structure to prevent sludge leakage during the feeding process. At the same time, a vibrating feeder is installed at the feed inlet to deliver sludge into the crusher evenly and stably.
[0026] In another embodiment of this utility model, the sludge conveying structure includes a sludge conveying tank 3, a conveying pipe 7, and several pressure sensors 6. The inlet of the sludge conveying tank 3 is connected to the outlet of the sludge storage tank 1. One end of the conveying pipe 7 is connected to the outlet of the sludge conveying tank 3, and the other end of the conveying pipe 7 is connected to the sludge co-firing structure. The conveying pipe 7 uses compressed gas to convey the crushed sludge particles. Several pressure sensors 6 are installed at the inlet and outlet of the conveying pipe 7.
[0027] In another embodiment of the present invention, the sludge conveying tank 3 is provided with a feed valve 4 at its inlet and a discharge valve 5 at its outlet.
[0028] The sludge conveying tank 3 serves as a transfer station for sludge particles, receiving sludge particles from the sludge crushing structure 2 via pipeline. The crushed sludge particles are then transported via the transmission pipeline 7 using compressed air. The outer shell of the transmission pipeline 7 is made of wear-resistant and corrosion-resistant material. Multiple pressure sensors 6 are installed on the transmission pipeline 7, primarily at the inlet and outlet, to monitor the sludge conveying pressure in real time. When the pressure exceeds a set value, the automatic control system adjusts the air compressor in the sludge conveying tank 3 to regulate the compressed air pressure and flow rate, ensuring smooth sludge transport. The discharge valve 5 has a flow rate regulation function. By measuring the sludge flow rate within the transmission pipeline 7 and adjusting the discharge valve 5 according to changes in the furnace temperature and load of the incinerator 9, the sludge flow rate within the pipeline is controlled to ensure that the temperature and load of the incinerator 9 meet requirements.
[0029] In another embodiment of this utility model, the sludge co-firing structure includes an incinerator 9, a temperature sensor for detecting the temperature inside the furnace, and an oxygen sensor for detecting the oxygen content inside the furnace. The incinerator 9 is provided with the return nozzle, which is connected to the sludge conveying structure. The temperature sensor and the oxygen sensor are located inside the incinerator 9 and communicate with the sludge conveying structure.
[0030] In another embodiment of this utility model, the return nozzle is located in the high-temperature zone between the auxiliary burner and the secondary air inlet of the incinerator 9.
[0031] In another embodiment of this utility model, a return spray gun 8 is provided at the return spray port.
[0032] Multiple return spray nozzles are provided at the top and throat of the incinerator 9, through which crushed and conveyed sludge is evenly sprayed into the incinerator 9. The design angle and position of the return spray nozzles are optimized, positioned in the high-temperature zone between the auxiliary burner and the secondary air inlet of the incinerator 9, ensuring uniform distribution of sludge within the incinerator 9 and thorough mixing with the fuel. Multiple temperature and oxygen sensors are installed inside the incinerator 9 to monitor the temperature and oxygen content in real time, and the data is fed back to the flow control valve via wireless transmission, automatically adjusting the sludge return spray amount according to the furnace temperature and oxygen content. Based on the monitoring data, the automatic control system adjusts the sludge return spray amount, fuel supply, and combustion air intake to ensure a stable and efficient combustion process within the incinerator 9. The return spray gun 8 atomizes the sludge, generating a high-temperature, stable return combustion zone with good adjustability.
[0033] Sludge is transported by a transport vehicle into the sludge storage tank 1, where it is crushed into small particles by the sludge crushing structure 2. These small particles are then conveyed by a belt conveyor to the sludge transfer tank 3. Before feeding, the discharge valve 5 is closed. A level gauge is installed in the sludge transfer tank 3. When the sludge reaches the maximum level, sludge transport is stopped, and the feed valve 4 is closed. The sludge transfer tank 3 is pressurized to a specified value by an air compressor, and the discharge valve 5 is opened. The small sludge particles then enter the return spray port through the transmission pipe 7. Through the return spray gun 8 located at the return spray port, the small sludge particles are then sprayed into the incinerator 9 by another high-pressure air stream for high-temperature combustion. Once the small sludge particles in the sludge transfer tank 3 have been completely discharged, the discharge valve 5 is closed, and the feed valve 4 is opened to feed more sludge. After feeding is complete, the feed valve 4 is closed, and the discharge valve 5 is opened to discharge the sludge. This cycle is repeated, and adjustments are made based on changes in the incinerator 9's internal temperature and sludge outlet pressure to achieve efficient and stable operation of the incinerator 9.
[0034] During installation, the sludge storage tank 1, sludge crushing structure 2, air compressor, and sludge conveying tank 3 are installed below the eight-meter unloading hall to facilitate sludge transportation and unloading. The system equipment is installed as close as possible to the incinerator 9 to reduce the length of the conveying pipeline and system conveying resistance. The conveying pipeline 7 is installed with large bends and at an angle, minimizing vertical installation to reduce system conveying resistance and save operating costs.
[0035] The entire technical solution achieves integrated treatment of sludge with 60% water content, including crushing, conveying, and incineration. This simplifies the process, reduces treatment costs, and yields significant economic and environmental benefits. By directly injecting the crushed sludge back into the waste incinerator using compressed air, wastewater and odor pollution are reduced. No steam consumption is required, significantly lowering equipment investment and operating costs. The equipment cost is only 30% of existing sludge treatment technologies. Furthermore, the atomized sludge particles, when injected into the furnace, result in more complete and stable combustion, reducing wear on the grate equipment and ensuring continuous, efficient, and long-term operation.
[0036] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A sludge treatment device with a water content of 60%, characterized in that, The system includes a sludge storage tank, a sludge crushing structure, a sludge conveying structure, and a sludge co-firing structure. The sludge crushing structure is located in the sludge storage tank. The outlet of the sludge storage tank is connected to the input end of the sludge conveying structure, and the output end of the sludge conveying structure is connected to the sludge co-firing structure. The sludge crushing structure crushes lumpy sludge, and the sludge conveying structure transports the crushed sludge particles to the return nozzle of the sludge co-firing structure.
2. The sludge treatment device with a water content of 60% according to claim 1, characterized in that, The sludge crushing structure includes a base, a first crushing motor, a second crushing motor, a first serrated blade, and a second serrated blade. The base is disposed in the sludge storage tank. The first crushing motor and the second crushing motor are disposed on the base facing each other. The output end of the first crushing motor is connected to a first rotating shaft, and the output end of the second crushing motor is connected to a second rotating shaft. The first serrated blade is disposed on the first rotating shaft, and the second serrated blade is disposed on the second rotating shaft.
3. The sludge treatment device with a water content of 60% according to claim 2, characterized in that, The first serrated blade extends outward from the center of the first rotating shaft, and there is a gap between adjacent first serrated blades. The second serrated blade extends outward from the center of the second rotating shaft, and there is a gap between adjacent second serrated blades.
4. The sludge treatment device with a water content of 60% according to claim 3, characterized in that, The first rotating shaft is arranged parallel to the second rotating shaft. During the crushing operation, the first serrated blade passes through the gap between the second serrated blades, and the second serrated blade passes through the gap between the first serrated blades.
5. A sludge treatment device with a water content of 60% according to claim 2, characterized in that, The base is also equipped with a sprayer, which sprays surfactant onto the positions of the first and second serrated blades.
6. The sludge treatment device with a water content of 60% according to claim 1, characterized in that, The sludge transfer structure includes a sludge transfer tank, a transfer pipeline, and several pressure sensors. The inlet of the sludge transfer tank is connected to the outlet of the sludge storage tank. One end of the transfer pipeline is connected to the outlet of the sludge transfer tank, and the other end of the transfer pipeline is connected to the sludge co-firing structure. The transfer pipeline uses compressed gas to transfer the crushed sludge particles. Several pressure sensors are installed at the inlet and outlet of the transfer pipeline.
7. A sludge treatment device with a water content of 60% according to claim 6, characterized in that, The sludge conveying tank is equipped with a feed valve at its inlet and a discharge valve at its outlet.
8. A sludge treatment device with a water content of 60% according to claim 1, characterized in that, The sludge co-firing structure includes an incinerator, a temperature sensor for detecting the temperature inside the furnace, and an oxygen sensor for detecting the oxygen content inside the furnace. The incinerator is equipped with the return nozzle, which is connected to the sludge transport structure. The temperature sensor and the oxygen sensor are located inside the incinerator and communicate with the sludge transport structure.
9. A sludge treatment device with a water content of 60% according to claim 8, characterized in that, The return nozzle is located in the high-temperature zone between the auxiliary burner and the secondary air inlet of the incinerator.
10. A sludge treatment device with a water content of 60% according to claim 8, characterized in that, A return spray gun is provided at the return spray port.