Integrated sludge drying treatment method and device

Abstract

The invention provides an integrated sludge drying treatment method and device, and belongs to the technical field of sewage treatment. Tail flue gas of a fluidized bed incinerator is averagely distributed to more than two sludge drying systems through a horizontal flue to serve as heat exchange air; the heat exchange air is blown into a heat exchange chamber of each sludge drying system, so that the wet sludge material in the suspension state enters a rotary suspension state, heat exchange is completed, and sludge drying particles are formed; the particles enter corresponding bag-type dust removers through corresponding particle upgoing air ducts; and conveying the sludge drying particles collected by the bag-type dust collector into the fluidized bed incinerator for combustion. The horizontal space required by the system is effectively saved through the high-position arrangement of the bag collector, so that the overall layout is more compact. And secondly, the design of the horizontal inlet and outlet flues not only realizes uniform distribution of hot flue gas, but also smoothly collects clean flue gas, and solves the problem of flue gas distribution when a plurality of groups of drying systems run in parallel.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an integrated sludge drying treatment method and device. Background Art

[0002] With the acceleration of urbanization and the development of industry, the amount of sewage treatment is increasing, and the amount of sludge generated is also increasing. Sludge is an inevitable byproduct of sewage treatment, containing a large amount of organic matter, pathogens, heavy metals and persistent organic pollutants. If it is not properly treated, it will cause serious pollution to the environment.

[0003] Traditional sludge treatment methods mainly include landfill, incineration, composting and land utilization. Among them, although landfill has low cost, it occupies a large amount of land resources and has the risk of leakage, which may cause groundwater and soil pollution. Although incineration can greatly reduce the volume of sludge, it has high investment and operating costs and may produce harmful gases and ash. Although composting can convert sludge into organic fertilizer, the treatment cycle is long, and the content of heavy metals and pathogens in the product may not meet safety standards. Although land utilization can be used as a soil conditioner, pollutants in sludge may enter the food chain and affect the ecological environment and human health. In addition, the existing sludge treatment technology also has the following disadvantages: low treatment efficiency, high energy consumption, and the generation of harmful gases, wastewater or solid waste during the treatment process, causing secondary pollution.

[0004] Therefore, there is an urgent need for an efficient, environmentally friendly and economical integrated sludge drying treatment method and device. Summary of the invention

[0005] The object of the present invention is to provide an integrated sludge drying treatment method and device to solve at least one technical problem existing in the prior art.

[0006] The present invention protects an integrated sludge drying treatment method, comprising: conveying sludge drying particles into a fluidized bed incinerator for combustion; the tail flue gas of the fluidized bed incinerator is evenly distributed to more than two sludge drying systems as heat exchange air through a horizontal flue;

[0007] The heat exchange air is blown into the heat exchange chamber of each sludge drying system, so that the wet sludge material in the suspended state enters the rotating suspension state and completes the heat exchange to form sludge drying particles; wherein the heat exchange air inlet is arranged on one side of the heat exchange chamber, and the heat exchange air is blown in horizontally;

[0008] The dust-containing gas containing the dried sludge particles enters the corresponding bag filter from the top of the heat exchange chamber in the fluidized bed sludge dryer through the corresponding particle upward air duct to perform gas-solid separation of the dried sludge particles and the gas;

[0009] The dried sludge particles collected by the bag filter are transported to the fluidized bed incinerator for combustion.

[0010] Furthermore, the preferred method is that before the heat exchange flue gas is blown into the heat exchange chamber of each sludge drying system, it also includes:

[0011] The fluidizing air is distributed to the fluidizing air hood through the fluidizing air inlet and the fluidizing air box. The fluidizing air hood blows the hot air vertically and evenly upward from the bottom of the heat exchange chamber to the wet sludge material to be treated, so that the wet sludge material enters a suspended state.

[0012] Furthermore, a preferred method is that the number of sludge drying systems is 2-5.

[0013] Furthermore, the preferred method is that in each sludge drying system, a feeding unit is provided for each heat exchange chamber; each feeding unit includes a wet sludge screw conveyor on the heat exchange bed for conveying the wet sludge material to be treated from the wet sludge hopper to the heat exchange chamber in the fluidized bed sludge dryer.

[0014] Further, the preferred method is that, in each sludge drying system, a discharging unit is provided for each bag filter; the discharging unit comprises a ash hopper, a sludge discharger, a dry sludge screw conveyor, a dry sludge conveying pipeline and a Roots blower provided corresponding to the dry sludge screw conveyor; the working steps of the discharging unit include:

[0015] After the dust cleaning process, the dried sludge particles attached to the surface of the filter bag of the bag filter fall into the ash hopper;

[0016] The dried sludge particles enter the dry sludge screw conveyor from the ash hopper through the sludge discharger and form a closed conveying system with the Roots blower;

[0017] The pressure and air volume of the Roots blower are adjusted according to the particle size of the dried sludge particles; the dried sludge particles are transported to the fluidized bed incinerator for combustion.

[0018] Furthermore, a preferred method is that after the bag filter performs gas-solid separation, the gas is discharged through a chimney after being subjected to desulfurization treatment.

[0019] Furthermore, a preferred method is that, in each sludge drying system, a first bracket is provided for each bag-type dust collector, so that the bag-type dust collector and the fluidized bed dryer are arranged in parallel, and the arrangement height of the bag-type dust collector and the discharge unit corresponding to the bag-type dust collector are higher than the height of the heat exchange chamber.

[0020] Furthermore, a preferred method is that, in each sludge drying system, the feeding unit and the discharging unit are arranged below the corresponding first bracket.

[0021] Further, a preferred method is that a sludge drying system distribution flue is vertically arranged downward on the horizontal flue; and a second bracket is correspondingly arranged on the sludge drying system distribution flue;

[0022] The corresponding fluidizing fan is arranged below the second bracket.

[0023] The present invention also protects an integrated sludge drying treatment device, which is used to implement the integrated sludge drying treatment method as described above;

[0024] The device includes a drying and combustion unit, a flue gas distribution unit and a sludge drying unit;

[0025] The drying and combustion unit is used to transport the dried sludge particles into the fluidized bed incinerator for combustion;

[0026] The flue gas distribution unit is used to evenly distribute the tail flue gas of the fluidized bed incinerator to more than two sludge drying systems as heat exchange air through the horizontal flue;

[0027] The sludge drying unit is used to blow the heat exchange air into the heat exchange chamber of each sludge drying system, so that the wet sludge material in a suspended state enters a rotating suspended state and completes heat exchange to form sludge drying particles; wherein the heat exchange air inlet is arranged on one side of the heat exchange chamber, and the heat exchange air is blown in a horizontal direction; the dust-containing gas containing the sludge drying particles enters the corresponding bag filter from the top of the heat exchange chamber in the fluidized bed sludge dryer through the corresponding particle upward air duct to perform gas-solid separation of the sludge drying particles and the gas; the sludge drying particles collected by the bag filter are transported to the fluidized bed incinerator for combustion.

[0028] As described above, the integrated sludge drying treatment method and device of the present invention is to transport the sludge drying particles into a fluidized bed incinerator for combustion; the tail flue gas of the fluidized bed incinerator is evenly distributed to more than two sludge drying systems as heat exchange air through a horizontal flue; the heat exchange air is blown into the heat exchange chamber of each sludge drying system, so that the wet sludge material in a suspended state enters a rotating suspended state and completes heat exchange to form sludge drying particles; wherein the heat exchange air inlet is arranged on one side of the heat exchange chamber, and the heat exchange air is blown in a horizontal direction; the dust-containing gas containing the sludge drying particles enters the corresponding bag filter from the top of the heat exchange chamber in the fluidized bed sludge dryer through the corresponding particle upward air duct to perform gas-solid separation of the sludge drying particles and gas; the sludge drying particles collected by the bag filter are transported to the fluidized bed incinerator for combustion. The present invention effectively saves the horizontal space required for the system through the high-position arrangement of the bag filter, making the overall layout more compact. Secondly, the horizontal inlet and outlet flues in the system are cleverly designed, which not only achieves uniform distribution of hot flue gas, but also smoothly collects clean flue gas, solving the problem of flue gas distribution when multiple drying systems are running in parallel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By referring to the following description and claims in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the accompanying drawings:

[0030] Figure 1 is a schematic flow chart of an integrated sludge drying treatment method according to an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of an integrated sludge drying treatment device according to an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the sludge drying system according to the embodiment of the present invention.

[0033] Among them: 1. Flue gas outlet at the rear of the fluidized bed incinerator; 2. Flue gas inlet displacement compensator; 3. Horizontal flue; 4. Second bracket; 5. Heat exchange air inlet; 6. Fluidizing fan; 7. Fluidizing air flue; 8. Fluidized bed dryer; 9. Particle upward air duct; 10. Bag filter; 11. Compressed air backflush system; 12. Clean horizontal flue at the outlet of bag filter; 13. Desulfurization equipment; 14. Ash hopper; 15. Dry sludge screw conveyor; 16. Roots blower; 17. Star feeder; 18. Material sealer; 19. Dry sludge conveying pipeline; 20. Sludge plow discharger; 21. Wet sludge belt conveyor; 22. Wet sludge hopper; 23. Wet sludge screw conveyor. DETAILED DESCRIPTION

[0034] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, well-known structures and devices are shown in the form of block diagrams.

[0035] It should be understood that terms such as "horizontal", "vertical", "up", "down", "top", "middle", "length", "inside", and "bottom" indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected, electrically connected, or able to communicate with each other; they can be directly connected, or indirectly connected through an intermediate medium, and they can be internally connected between two elements or an interactive relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Figure 1-Figure 3 The integrated sludge drying treatment plant is described in general. Specifically, Figure 1 It is a schematic diagram of the process of an integrated sludge drying treatment device according to an embodiment of the present invention. Figure 2 It is a schematic structural diagram of an integrated sludge drying treatment device according to an embodiment of the present invention. Figure 3 It is a schematic structural diagram of a sludge drying treatment system according to an embodiment of the present invention.

[0039] like Figure 1 As shown, the integrated sludge drying treatment method provided by the present invention includes steps S110 to S140.

[0040] S110, conveying the sludge drying particles into a fluidized bed incinerator for combustion; the tail flue gas of the fluidized bed incinerator is evenly distributed to more than two sludge drying systems as heat exchange air through a horizontal flue. The number of sludge drying systems is 2-5.

[0041] S120, the heat exchange air is blown into the heat exchange chamber of each sludge drying system, so that the wet sludge material in a suspended state enters a rotating suspended state and completes heat exchange to form sludge drying particles; wherein, the heat exchange air inlet is arranged on one side of the heat exchange chamber, and the heat exchange air is blown in a horizontal direction; before the heat exchange flue gas is blown into the heat exchange chamber of each sludge drying system, it also includes that the fluidizing air is distributed to the fluidizing air hood through the fluidizing air inlet and the fluidizing air box, and the fluidizing air hood blows the hot air vertically upward from the bottom of the heat exchange chamber to the wet sludge material to be treated, so that the wet sludge material enters a suspended state.

[0042] In each sludge drying system, a feeding unit is provided for each heat exchange chamber; each feeding unit includes a wet sludge screw conveyor on the heat exchange bed of the heat exchange chamber in the fluidized bed sludge dryer for conveying the wet sludge material to be treated from the wet sludge hopper to the heat exchange chamber. A discharging unit is provided for each bag filter; the discharging unit includes an ash hopper, a star feeder, a dry sludge screw conveyor, a dry sludge conveying pipeline, and a Roots blower provided corresponding to the dry sludge screw conveyor.

[0043] The working steps of the discharging unit include: S121. After cleaning, the dried sludge particles attached to the surface of the filter bag of the bag-type dust collector fall into the ash hopper. S122. The dried sludge particles pass through the star feeder from the ash hopper into the dry sludge screw conveyor and the Roots blower to form a closed conveying system. S123. According to the particle size of the dried sludge particles, the pressure and air volume of the Roots blower are adjusted; the dried sludge particles are transported to the fluidized bed incinerator for combustion; after the bag-type dust collector performs gas-solid separation, the gas is discharged through the chimney after desulfurization treatment.

[0044] S130, the dust-containing gas containing the sludge drying particles enters the corresponding bag dust collector from the top of the heat exchange chamber in the fluidized bed sludge dryer through the corresponding particle upward air duct to perform gas-solid separation of the sludge drying particles and the gas.

[0045] S140, transporting the dried sludge particles collected by the bag filter to the fluidized bed incinerator for combustion.

[0046] The temperature of the incineration chamber of the fluidized bed incinerator is 850°C. When the particles are exposed to the wind, the surrounding air velocity will generate a force on the particles. This force is called drag force, and its size is related to the windward area of ​​the particles, the air velocity and the air density. The wind from bottom to top can be decomposed into a vertical upward component and a lateral component. The vertical upward component helps the particles to rise; that is, the first air distribution plate provides a vertical upward lift for the wet sludge material in the heat exchange chamber; so that the wet sludge material becomes wet sludge particles in a suspended state. The fluidizing fan arranged at the bottom of the fluidized bed sludge dryer 4 provides high-speed fluidized hot flue gas, which blows up the sludge through the wind hood of the air distribution plate at the bottom of the bed and presents a suspended state. This part of the flue gas accounts for about 50% of the total hot flue gas. In order to improve the drying efficiency of the fluidized bed sludge dryer, it also includes blowing heat exchange flue gas on one side of the heat exchange bed, and the heat exchange flue gas enters the heat exchange chamber through the heat exchange air duct; the heat exchange flue gas is blown in the horizontal direction; the heat exchange flue gas comes from the tail flue gas output by the fluidized bed incinerator. The lateral component may cause the particles to rotate. The lateral wind will generate lift force on the particles. If the shape of the particles is asymmetrical, this lift force can cause the particles to rotate around their center of gravity. This phenomenon is similar to the working principle of an airplane wing. The heat exchange flue gas that is cut in horizontally is arranged in the fluidized bed sludge dryer to change the movement form of the suspended sludge particles from vertical rise to rotational rise, increase the tumbling strength of the sludge particles, and accelerate the decomposition and heat exchange of the wet sludge particles.

[0047] By utilizing the waste heat of the flue gas at the tail of the circulating fluidized bed boiler to dry the sludge, the thermal efficiency of the entire system can be improved and energy consumption can be reduced; the flue gas at the tail of the fluidized bed incinerator is evenly distributed to the sludge drying system through the horizontal flue, ensuring the uniform utilization of the flue gas and the full utilization of the heat energy; setting up 2-5 sludge drying systems can provide greater operational flexibility and reliability, and a drying system can be started or stopped as needed to adapt to different sludge processing volumes. In this embodiment, the number of sludge drying systems is 3. The drying system is arranged with horizontal inlet and outlet flues, which can effectively distribute hot flue gas and collect clean flue gas, solving the problem of uneven hot flue gas distribution that may occur when multiple drying systems are running in parallel, while improving the equipment integration of the integrated sludge drying treatment device of the utility model.

[0048] like Figure 2As shown, the present invention also protects an integrated sludge drying treatment device for implementing the integrated sludge drying treatment method as described above; the device includes a drying combustion unit, a flue gas distribution unit and a sludge drying unit; the drying combustion unit includes a fluidized bed incinerator for incinerating sludge drying particles; the flue gas distribution unit includes a horizontal flue 3 for conveying the tail flue gas of the fluidized bed incinerator, and more than two sludge drying system distribution flues vertically downwardly arranged on the horizontal flue 3; the sludge drying unit is used to blow the tail flue gas as heat exchange air into the heat exchange chamber of each sludge drying system, so that the wet sludge material in the suspended state enters a rotating suspension state and completes heat exchange to form sludge drying particles. ; The sludge drying unit includes a sludge fluidized bed dryer, a bag dust collector 10 and a feeding unit corresponding to the sludge fluidized bed dryer 8, and a discharging unit corresponding to the bag dust collector 10; the sludge fluidized bed dryer includes a heat exchange chamber, a heat exchange air inlet 5 is provided on one side of the heat exchange chamber, and the heat exchange air is blown in horizontally; a particle upward air duct 9 is provided on the top of the heat exchange chamber in the fluidized bed sludge dryer 8; the particle upward air duct 9 is connected to the corresponding bag dust collector 10; the feeding unit is used to transport wet sludge material to the sludge fluidized bed dryer 8; the discharging unit is used to transport sludge drying particles from the bag dust collector 20 to the fluidized bed incinerator.

[0049] A horizontal flue 3 is arranged at the flue gas outlet 1 at the rear of the fluidized bed incinerator; and more than two sludge drying system distribution flues are arranged vertically downward on the horizontal flue 3; in order to improve the spatial compactness of the device structure, a flue gas inlet displacement compensator 2 is arranged at the rear flue gas input on the horizontal flue 3.

[0050] The sludge fluidized bed dryer 8 also includes a fluidizing air flue 7, a fluidizing air inlet, a fluidizing fan 6, a fluidizing air wind box and a fluidizing air hood; wherein the fluidizing air box is arranged at the bottom of the heat exchange chamber; the fluidizing air inlet is arranged on the side of the fluidizing air wind box, and the fluidizing air is distributed to the fluidizing air hood through the fluidizing air inlet and the fluidizing air wind box, and the fluidizing air hood blows the hot air vertically upward from the bottom of the heat exchange chamber evenly toward the wet sludge material to be treated.

[0051] The bag filter 10 is arranged at the top of the heat exchange chamber in the fluidized bed sludge dryer 9; a particle upward air duct 5 is arranged between the heat exchange chamber and the bag filter 10; a dry sludge screw conveyor 15 and a dry sludge conveying pipeline 19 are arranged below the bag filter 6, and the dry sludge screw conveyor 15 is connected to the fluidized bed incinerator through the dry sludge conveying pipeline 19. The working process of the bag filter 10 includes that the dust-containing gas is introduced into the inlet of the bag filter under the action of the fan. Before the gas enters the filter bag, there is usually a pretreatment stage, such as gravity sedimentation, inertial separation, etc., to remove larger particles of dust and reduce the burden of the filter bag. When the dust-containing gas passes through the filter bag, the dust particles are intercepted by the fibers of the filter bag, or adsorbed on the surface of the filter bag due to electrostatic action, and the clean gas passes through the filter bag fibers and enters the inside of the filter bag. As the filtering process proceeds, the dust forms a layer of dust cake on the outer surface of the filter bag. When the dust on the outer surface of the filter bag accumulates to a certain extent, it will affect the dust removal efficiency and the normal operation of the system, and cleaning is required at this time. There are many ways to clean the dust, including mechanical vibration, backwash (reverse airflow), pulse jet, etc. During cleaning, the filter bag will expand or vibrate rapidly, causing the dust attached to the surface of the filter bag to fall off and fall into the ash hopper. The dust collected in the ash hopper can be discharged regularly by gravity, screw conveyors, dischargers and other equipment. After filtering and cleaning, the clean gas is discharged from the inside of the filter bag and discharged from the system through the outlet. Bag filters are usually equipped with a control system to automatically control the cleaning cycle, monitor parameters such as temperature and pressure, and ensure stable operation of the equipment. An induced draft fan is arranged between the gas outlet of the bag filter 10, that is, the clean horizontal flue 12 at the bag filter outlet and the desulfurization equipment 13. The desulfurization equipment 13 is used to treat sulfur oxides in boiler flue gas and reduce environmental pollution. The induced draft fan is used to provide the negative pressure or positive pressure required by the system to ensure gas flow. In this embodiment, after the dust cleaning process of the compressed air back-blowing system 11, the dried sludge particles attached to the surface of the filter bag of the bag filter fall into the ash hopper.

[0052] In order to further improve the transportation efficiency of the dried sludge particles, the dry sludge screw conveyor 15 and the Roots blower 16 form a closed conveying system for conveying dried sludge particles; the air outlet of the Roots blower 16 is connected to the air inlet of the dry sludge screw conveyor 15. In some bulk material conveying systems, the bolt conveyor may need to be used in conjunction with the Roots blower, especially in the pneumatic conveying system. The pneumatic conveying system uses airflow to transport materials to the destination through a pipeline, and the Roots blower can provide the necessary high-pressure airflow for such a system. In this case, the bolt conveyor can be used as a component of the pneumatic conveying system to feed materials into the feed port of the pneumatic conveying system. Specifically, before installation, check whether the conveyor and its parts are intact. Measure the size of the reserved hole at the installation site to ensure that it matches the size of the installation hole of the conveyor support plate. Bolt each section of the conveyor to ensure that it is in a straight line after connection. Set the feed port and discharge port on site as needed, and ensure that the broken weld is sealed with sealant to prevent leakage. Then proceed with the installation of the Roots blower: Choose a solid foundation to ensure that the blower is stable and reliable after installation. Connect the air inlet and outlet of the blower to the corresponding pipes. The electrical connection should be completed by a professional electrical engineer, and ensure that the cable connection, power supply current and frequency meet the design requirements. Install a muffler and shock absorber to reduce noise and vibration. Relative setting of the pneumatic conveying system: Ensure that the air outlet of the Roots blower is correctly connected to the air inlet of the bolt conveyor to form a closed conveying system. Adjust the pressure and air volume of the blower to suit the characteristics of the material and the conveying distance. Ensure that all connections of the entire system are sufficiently sealed to prevent air leakage. Before starting the Roots blower, perform a no-load test run to check whether the operating sound and vibration of the blower are normal. Gradually increase the working load of the blower, while observing the operating status and temperature of the blower. Debug the conveying system to ensure that the material can be smoothly transported to the destination. Ensure that all safety regulations are followed during installation, including wearing appropriate safety equipment. Regularly check the operating conditions of the bolt conveyor and Roots blower, and perform maintenance and repairs in a timely manner. After completing the above steps, the bolt conveyor and Roots blower should be able to work together to achieve effective pneumatic conveying.

[0053] A discharging unit is arranged below the bag filter 10, and the discharging unit includes an ash hopper 14, a star feeder 17, a dry sludge screw conveyor 15, a dry sludge conveying pipeline 19, and a Roots blower 16 arranged corresponding to the dry sludge screw conveyor 15; the ash hopper 14 is arranged below the bag filter 10; a star feeder 17 is arranged at the output port of the ash hopper 16; a dry sludge screw conveyor 15 and a dry sludge conveying pipeline 19 are arranged below the star feeder 17; the dry sludge screw conveyor 15 and the Roots blower 16 form a closed pneumatic conveying system; the end of the dry sludge conveying pipeline 19 is connected to the fluidized bed incinerator. A material sealer 18 is also arranged on the dry sludge screw conveyor 15 and the dry sludge conveying pipeline 19. In the sludge conveying system, the material sealer is usually used to ensure the sealing during the material conveying process, prevent the sludge dust from leaking out, and reduce environmental pollution. The material sealer helps to ensure the stable flow of sludge in pipelines or other closed conveying systems, avoiding conveying interruptions caused by pressure fluctuations or changes in material properties. The gas outlet of the bag filter 10 is connected to the desulfurization equipment 13, and the gas outlet of the desulfurization equipment 13 is provided with a chimney. The fluidized bed incinerator is provided with an incinerator slag removal system for discharging the residue generated after the high-temperature combustion of the sludge drying particles. The temperature of the tail flue gas output by the fluidized bed incinerator is 120°C to 160°C.

[0054] Each feeding unit includes a wet sludge screw conveyor 23 for conveying the wet sludge material to be treated from the wet sludge hopper to the heat exchange bed of the heat exchange chamber in the fluidized bed sludge dryer 8. The feeding unit also includes a sludge plow discharger 20 arranged above the wet sludge hopper 22, and the sludge plow discharger 20 is arranged at the end of the wet sludge belt conveyor 21.

[0055] In each sludge drying system, a first bracket is provided for each bag filter 10, so that the bag filter 10 is arranged in parallel with the fluidized bed dryer 8, and the bag filter 10 and the discharge unit corresponding to the bag filter 10 are arranged at a height higher than the height of the heat exchange chamber. The feeding unit and the discharge unit are arranged below the corresponding first bracket. A second bracket 4 is provided corresponding to the distribution flue of the sludge drying system; the corresponding fluidizing fan is arranged below the second bracket 4. Through the hollow setting of the two brackets, the fluidized bed dryer 8 is set as a vertical sludge dryer; by arranging the bag filter at a high place, the horizontal space for arranging the sludge drying system can be saved; and through the first bracket and the second bracket, the three groups of sludge drying systems can be neatly arranged in the extension direction of the horizontal flue.

[0056] In summary, the present invention provides an integrated sludge drying treatment device, which fully considers space utilization and energy efficiency. First, the high-position arrangement of the bag dust collector effectively saves the horizontal space required for the system, making the overall layout more compact. Secondly, the horizontal inlet and outlet flues in the system are cleverly designed, which not only realizes the uniform distribution of hot flue gas, but also smoothly collects clean flue gas, solving the problem of flue gas distribution when multiple drying systems are running in parallel. In addition, the transportation of dry sludge adopts the Roots blower arranged on the bottom layer for dilute phase transportation, and directly sends it to the boiler for combustion. Such a design simplifies the system structure and minimizes energy consumption. For the transportation of wet sludge, the sludge is transported to the wet sludge hopper in front of the dryer through the coordinated use of a belt conveyor and a plow-type unloader. This process not only solves the problem of receiving materials for multiple drying systems, but also ensures the simplicity and reliability of the system. Finally, the entire sludge drying system adopts a steel support structure. Such a structural design saves space while reducing construction costs and shortening the construction period. In summary, the design of this system aims to achieve high efficiency, energy saving and economy of sludge drying, while ensuring simple operation and convenient maintenance.

[0057] However, those skilled in the art should understand that various improvements can be made to the integrated sludge drying treatment device provided by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. An integrated sludge drying treatment method, characterized in that: Methods include, The sludge drying particles are transported into the fluidized bed incinerator for combustion; the tail flue gas of the fluidized bed incinerator is evenly distributed to more than two sludge drying systems as heat exchange air through the horizontal flue; The heat exchange air is blown into the heat exchange chamber of each sludge drying system, so that the wet sludge material in the suspended state enters the rotating suspension state and completes the heat exchange to form sludge drying particles; wherein the heat exchange air inlet is arranged on one side of the heat exchange chamber, and the heat exchange air is blown in horizontally; The dust-containing gas containing the dried sludge particles enters the corresponding bag filter from the top of the heat exchange chamber in the fluidized bed sludge dryer through the corresponding particle upward air duct to perform gas-solid separation of the dried sludge particles and the gas; The dried sludge particles collected by the bag filter are transported to the fluidized bed incinerator for combustion.

2. The integrated sludge drying treatment method according to claim 1, characterized in that: Before the heat exchange flue gas is blown into the heat exchange chamber of each sludge drying system, it also includes: The fluidizing air is distributed to the fluidizing air hood through the fluidizing air inlet and the fluidizing air box. The fluidizing air hood blows the hot air vertically and evenly upward from the bottom of the heat exchange chamber to the wet sludge material to be treated, so that the wet sludge material enters a suspended state.

3. The integrated sludge drying treatment method according to claim 1, characterized in that: The number of sludge drying systems is 2-5.

4. The integrated sludge drying treatment method according to claim 1, characterized in that: In each sludge drying system, a feeding unit is provided for each heat exchange chamber; each feeding unit comprises a wet sludge screw conveyor on the heat exchange bed for conveying the wet sludge material to be processed from the wet sludge hopper to the heat exchange chamber in the fluidized bed sludge dryer.

5. The integrated sludge drying treatment method according to claim 1, characterized in that: In each sludge drying system, a discharge unit is provided for each bag filter; the discharge unit comprises an ash hopper, a sludge discharger, a dry sludge screw conveyor, a dry sludge conveying pipeline, and a Roots blower provided corresponding to the dry sludge screw conveyor; The working steps of the discharging unit include: After the dust cleaning process, the dried sludge particles attached to the surface of the filter bag of the bag filter fall into the ash hopper; The dried sludge particles enter the dry sludge screw conveyor from the ash hopper through the sludge discharger and form a closed conveying system with the Roots blower; The pressure and air volume of the Roots blower are adjusted according to the particle size of the dried sludge particles; the dried sludge particles are transported to the fluidized bed incinerator for combustion.

6. The integrated sludge drying treatment method according to claim 1, characterized in that: After the bag filter performs gas-solid separation, the gas is discharged through a chimney after being desulfurized.

7. The integrated sludge drying treatment method according to claim 5, characterized in that: In each sludge drying system, a first bracket is provided for each bag filter, so that the bag filter and the fluidized bed dryer are arranged in parallel, and the bag filter and the discharge unit corresponding to the bag filter are arranged at a height higher than the height of the heat exchange chamber.

8. The integrated sludge drying treatment method according to claim 7, characterized in that: In each sludge drying system, the feeding unit and the discharging unit are arranged below the corresponding first bracket.

9. The integrated sludge drying treatment method according to claim 1, characterized in that: A sludge drying system distribution flue is vertically arranged downward on the horizontal flue; a second bracket is arranged corresponding to the sludge drying system distribution flue; The corresponding fluidizing fan is arranged below the second bracket.

10. An integrated sludge drying treatment device, characterized in that: Used to implement the integrated sludge drying treatment method as claimed in claim 1; the device includes a drying combustion unit, a flue gas distribution unit and a sludge drying unit; wherein, The drying and combustion unit is used to transport the dried sludge particles into the fluidized bed incinerator for combustion; The flue gas distribution unit is used to evenly distribute the tail flue gas of the fluidized bed incinerator to more than two sludge drying systems as heat exchange air through the horizontal flue; The sludge drying unit is used to blow the heat exchange air into the heat exchange chamber of each sludge drying system, so that the wet sludge material in a suspended state enters a rotating suspended state and completes heat exchange to form sludge drying particles; wherein the heat exchange air inlet is arranged on one side of the heat exchange chamber, and the heat exchange air is blown in a horizontal direction; the dust-containing gas containing the sludge drying particles enters the corresponding bag filter from the top of the heat exchange chamber in the fluidized bed sludge dryer through the corresponding particle upward air duct to perform gas-solid separation of the sludge drying particles and the gas; the sludge drying particles collected by the bag filter are transported to the fluidized bed incinerator for combustion.

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