Sludge drying treatment method and device

Abstract

The invention provides a sludge drying treatment method and a sludge drying treatment device, and belongs to the technical field of sewage treatment. To-be-treated wet sludge is conveyed into a heat exchange chamber of a fluidized bed sludge dryer through a wet sludge screw conveyor; fluidization air is distributed to the fluidization air cap through the fluidization air inlet and the fluidization air bellow, and the fluidization air cap vertically and uniformly blows hot air upwards from the lower part of the heat exchange chamber to a wet sludge material to be treated, so that the wet sludge material enters a suspension state; heat exchange air enters the heat exchange chamber through the heat exchange air duct, so that the wet sludge material in a suspension state enters a rotary suspension state, and a boiling sludge flowing layer is formed; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume setting of the fluidized air and the heat exchange air is obtained by calculating fluid dynamics simulation prediction; and the heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles. The technical effects of high sludge drying treatment efficiency and low energy consumption can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a sludge drying treatment method and a device thereof. 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 sludge drying treatment method and device. Summary of the invention

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

[0006] The present invention protects a sludge drying treatment method, comprising:

[0007] The wet sludge material to be treated is conveyed to the heat exchange chamber of the fluidized bed sludge dryer through the wet sludge screw conveyor;

[0008] 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, so that the wet sludge material enters a suspended state;

[0009] The heat exchange air enters the heat exchange chamber through the heat exchange air duct, so that the wet sludge material in a suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume setting of the fluidizing air and the heat exchange air is obtained after being predicted by computational fluid dynamics simulation;

[0010] The heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles.

[0011] Further, a preferred method is that the method for predicting the air volume of the fluidizing air and the heat exchange air by computational fluid dynamics simulation includes:

[0012] Establish a physical model of the fluidized bed sludge dryer; use computational fluid dynamics simulation software to establish a gas-solid two-phase flow model, and use a turbulence model to describe the turbulent flow characteristics of the fluid;

[0013] Meshing the physical model of the fluidized bed sludge dryer and setting simulation boundary conditions;

[0014] Use computational fluid dynamics simulation software to simulate and calculate the root system simulation results; and optimize according to the results;

[0015] The optimized computational fluid dynamics simulation model is used to predict the air volumes of the fluidizing air and the heat exchange air.

[0016] Furthermore, a preferred method is that the air volume ratio of the fluidizing air to the heat exchange air is 5:5.

[0017] Further, a preferred method is that in the step of distributing the fluidizing air to the fluidizing air hood through the fluidizing air inlet and the fluidizing air box, the fluidizing air enters the fluidizing air inlet through the first spiral acceleration air duct.

[0018] Furthermore, a preferred method is that the first spiral accelerating air duct comprises a spiral-shaped air duct and a fluidizing air inlet located on a side of the air duct; the fluidizing air inlet is consistent with a tangent direction of the air duct.

[0019] Further, a preferred method is that in the step of the heat exchange air entering the heat exchange chamber through the heat exchange air duct, the heat exchange air enters the heat exchange air duct through the second spiral acceleration air duct.

[0020] Furthermore, a preferred method is that the fluidizing air inlet is arranged on the side of the fluidizing air box; and a fluidizing fan is arranged in the fluidizing air box.

[0021] Furthermore, a preferred method is to provide an ash discharge hole at the bottom of the fluidizing wind box.

[0022] Furthermore, a preferred method is that a bracket is provided at the bottom of the fluidized bed sludge dryer; and the fluidizing bellows is provided in the bottom space of the fluidized bed sludge dryer formed by the bracket.

[0023] The present invention also includes a sludge drying treatment device, comprising:

[0024] A conveying unit, used for conveying the wet sludge material to be treated to the heat exchange chamber of the fluidized bed sludge dryer through a wet sludge screw conveyor;

[0025] A fluidizing unit, used for distributing fluidizing air to a fluidizing air hood through a fluidizing air inlet and a fluidizing air wind box, wherein the fluidizing air hood blows hot air vertically upward from the bottom of the heat exchange chamber evenly toward the wet sludge material to be treated, so that the wet sludge material enters a suspended state;

[0026] The heat exchange unit is used to allow heat exchange air to enter the heat exchange chamber through a heat exchange air duct, so that the wet sludge material in a suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume settings of the fluidizing air and the heat exchange air are obtained after prediction through computational fluid dynamics simulation; the heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles.

[0027] As described above, the sludge drying treatment method and device of the present invention are as follows: the wet sludge material to be treated is conveyed to the heat exchange chamber of the fluidized bed sludge dryer through a wet sludge screw conveyor; the fluidized air is distributed to the fluidized air hood through the fluidized air inlet and the fluidized air bellows, and the fluidized 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; the heat exchange air enters the heat exchange chamber through the heat exchange air duct, so that the wet sludge material in the suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume setting of the fluidized air and the heat exchange air is obtained after being predicted by computational fluid dynamics simulation; the heat exchange flue gas and the sludge suspension layer perform heat exchange to form sludge drying particles. The present invention can achieve the technical effect of improving the sludge drying treatment efficiency and reducing energy consumption by adjusting the air volume of the fluidized air and the heat exchange air. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1 It is a schematic diagram of the process of the sludge drying treatment method according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic structural diagram of a sludge drying treatment device according to an embodiment of the present invention.

[0031] Figure 3 yes Figure 2 Schematic diagram of the structure at A.

[0032] Figure 4 yes Figure 2 Schematic diagram of the structure at B.

[0033] Among them: 1. wet sludge screw conveyor; 2. fluidizing air inlet; 3. fluidizing air bellows; 4. ash discharge hole; 5. fluidizing air hood; 6. heat exchange air duct; 7. bracket; 8. heat exchange air bellows; 9. heat exchange chamber; 10. insulation layer; 11. particle upward channel; 12. outlet flange. 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 2 The sludge drying treatment plant is described in general. Specifically, Figure 1 It is a schematic diagram of the process of a sludge drying treatment device according to an embodiment of the present invention. Figure 2 It is a schematic structural diagram of a sludge drying treatment device according to an embodiment of the present invention.

[0039] like Figure 1 As shown, the present invention protects a sludge drying method, including steps S110 to S140.

[0040] S110, the wet sludge material to be treated is conveyed to the heat exchange chamber of the fluidized bed sludge dryer through the wet sludge screw conveyor.

[0041] S120, 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 and evenly upward from the bottom of the heat exchange chamber toward the wet sludge material to be treated, so that the wet sludge material enters a suspended state.

[0042] S130. The heat exchange air enters the heat exchange chamber through the heat exchange air duct, so that the wet sludge material in a suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume settings of the fluidizing air and the heat exchange air are obtained after prediction by computational fluid dynamics simulation.

[0043] S140, the heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles.

[0044] In general, the present invention forms a rotating suspension state in the heat exchange chamber through the synergistic effect of the fluidizing air unit and the heat exchange air unit, accelerates the contact area and heat exchange efficiency between the sludge and the hot air, and thus improves the sludge drying efficiency. The hot air is evenly blown to the wet sludge through the fluidizing air hood, ensuring that each part of the sludge can obtain sufficient heat exchange, avoiding the problem of local overheating or uneven drying. The control unit adjusts the air volume ratio according to the data predicted by the computational fluid dynamics (CFD) simulation, realizes the precise control of the fluidizing air and the heat exchange air, avoids the waste of energy, and reduces energy consumption. By optimizing the air volume ratio and the heat exchange process, the emission of harmful gases and particulate matter is reduced, and the impact on the environment is reduced. The device has a reasonable structural design, a simplified operation process, and is easy to realize automatic control, reducing the complexity and labor intensity of manual operation. The device can flexibly adapt to different sludge drying treatment conditions by adjusting the air volume ratio of the fluidizing air and the heat exchange air according to different sludge characteristics and treatment requirements.

[0045] like Figure 2As shown, the present invention protects a sludge drying treatment device, including a conveying unit, which is used to convey the wet sludge material to be treated to the heat exchange chamber of the fluidized bed sludge dryer through a wet sludge screw conveyor; a fluidizing unit, which is used to distribute fluidizing air to the fluidizing air hood through a fluidizing air inlet and a fluidizing air box, and the fluidizing air hood blows 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; a heat exchange unit, which is used to allow heat exchange air to enter the heat exchange chamber through a heat exchange air duct, so that the wet sludge material in the suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume settings of the fluidizing air and the heat exchange air are obtained after prediction by computational fluid dynamics simulation; the heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles.

[0046] Specifically, it includes a heat exchange chamber 9 for drying wet sludge into dried sludge particles, a fluidizing air unit for inputting fluidizing air into the heat exchange chamber 9, and a heat exchange air unit for inputting heat exchange air into the heat exchange chamber 9; the fluidizing air unit includes a fluidizing air inlet 2, a fluidizing air box 3 and a fluidizing air hood 5; wherein the fluidizing air inlet 2 is arranged on the side of the fluidizing air box 3, and the fluidizing air is distributed to the fluidizing air hood 5 through the fluidizing air inlet 2 and the fluidizing air box 3, and the fluidizing air hood 5 blows the hot air vertically upward from the bottom of the heat exchange chamber 9 to the wet sludge to be treated; the heat exchange air unit includes a heat exchange air duct 6 and a heat exchange air box 8, and the heat exchange air duct 6 is arranged on one side of the heat exchange chamber 9; and also includes a control unit, which is used to adjust the air volume ratio of the fluidizing air unit and the heat exchange air unit according to the air volume data of the fluidizing air and the heat exchange air obtained after computational fluid dynamics simulation prediction. The CFD simulation results can be used to guide the control strategy of the actual sludge drying process, such as adjusting the air volume ratio of fluidizing air and heat exchange air to achieve a more stable and efficient drying process. Preferably, the air volume ratio of the fluidizing air to the heat exchange air is 5:5.

[0047] Specifically, the present invention can dry 60% of wet sludge into 30% of dry sludge. The wet sludge is suspended and boiled in the dryer to exchange heat. The three heat exchange modes of radiation, conduction and convection are combined. The heat exchange between the gas and solid phases is very sufficient and the heat exchange efficiency is high. The solid particles of the wet sludge can be quickly cracked in a short time. And the dusty flue gas is transported under the action of fluidized air and the negative pressure of the bag dust collector. The flue gas enters the subsequent bag dust collector along the ascending flue for gas-solid separation. The clean wet flue gas enters the next flue gas treatment process. 30% of the dry sludge enters the boiler through the power equipment for combustion, realizing comprehensive resource utilization.

[0048] That is to say, the fluidized flue gas is divided into two parts: the fluidized flue gas at the bottom and the heat exchange flue gas in the middle, with a ratio of about 5:5. The function of the bottom fluidized flue gas is to suspend the material, and the temperature is about 140°C. The middle heat exchange flue gas has two functions: a. Change the movement direction of the suspended particles, from vertical rise to spiral rise, to increase the turbulence effect. b. Provide the main heat exchange energy, and the temperature is also about 140°C. In summary, the fluidized bed sludge dryer uses fluidized flue gas to suspend the wet sludge in the dryer and perform efficient heat exchange, thereby achieving rapid drying of the sludge. At the same time, the cleanliness of the emission is ensured through gas-solid separation and flue gas treatment. The dried dry sludge can be further used for energy recovery, realizing the recycling of resources.

[0049] As an improvement of the present embodiment, a method for predicting the air volume of the fluidizing air and the heat exchange air through computational fluid dynamics simulation includes: S131, establishing a physical model of a fluidized bed sludge dryer; using computational fluid dynamics simulation software to establish a gas-solid two-phase flow model, and using a turbulence model to describe the turbulent flow characteristics of the fluid; S132, meshing the physical model of the fluidized bed sludge dryer and setting simulation boundary conditions; S133, using computational fluid dynamics simulation software to perform simulation calculations and calculate the simulation results; and optimizing according to the results; S134, using the optimized computational fluid dynamics simulation model to predict the air volume of the fluidizing air and the heat exchange air.

[0050] In this embodiment, the data of computational fluid dynamics (CFD) simulation software is connected by a control unit, and the air volume ratio is predicted and accurately controlled by CFD simulation. The present invention can effectively improve the sludge drying efficiency, reduce energy consumption, and reduce environmental pollution. In the specific implementation process, computational fluid dynamics (CFD) simulation is a powerful tool that solves the control equations of fluid mechanics in a computer by numerical methods to predict the flow of the flow field. In the application of sludge drying treatment devices, CFD simulation can help optimize the flow field distribution, improve heat exchange efficiency, reduce energy consumption, and improve the drying effect of sludge. In addition to predicting and accurately controlling the air volume ratio by CFD simulation, the flow field distribution in the drying chamber can also be simulated to find and improve the uneven flow field area, such as by arranging a guide plate at the entrance of the drying chamber to improve the uniformity of the air velocity at the mesh belt inlet and the outlet of the drying chamber, thereby improving the heat exchange efficiency between the sludge and the air.

[0051] Furthermore, CFD simulation can analyze energy consumption under different working conditions and help optimize the energy efficiency of the drying process, such as reducing energy consumption by adjusting the circulating air volume and bypass rate. In addition, CFD simulation can be used to study the impact of different operating parameters on sludge drying effects, such as hot air temperature, air flow rate, sludge thickness, etc., as well as the optimal combination of these parameters to achieve the best drying effect and the lowest energy consumption. CFD simulation can be used for the design and evaluation of new sludge drying equipment, and guide the optimal design of the equipment by simulating and predicting the performance of the equipment. CFD simulation can also evaluate the possible environmental impacts during the sludge drying process, such as odor diffusion, particulate matter emissions, etc., and propose corresponding control measures.

[0052] In the specific implementation process, a particle upward passage 11 is provided at the top of the heat exchange chamber 9, and the particle upward passage 11 is connected to the bag dust collector. An outlet flange 12 is provided in the particle upward passage 11. In the sludge drying treatment device, the design of the particle upward passage 11 is an important link for transporting the dried sludge particles from the heat exchange chamber 9 upward to the bag dust collector. Such a design helps to achieve the effective separation of sludge particles and dry air, while reducing the flying and diffusion of dust, ensuring the continuity and stability of the entire drying process. The bag dust collector can effectively capture the dust particles generated during the drying process through its filtering effect, preventing them from entering the atmosphere with the airflow, thereby reducing environmental pollution. The outlet flange 12 serves as a connecting component between the particle upward passage 11 and the bag dust collector, and its function is to ensure the airtightness between the passage and the dust collector, prevent gas leakage, and ensure the efficient operation of the system.

[0053] Figure 3 and Figure 4 The first spiral accelerating air duct and the second spiral accelerating air duct are described in general.

[0054] like Figure 4 As shown, a first spiral acceleration air duct is provided at the fluidizing air inlet 2. The first spiral acceleration air duct includes a spiral-shaped air duct and a fluidizing air inlet located on the side of the air duct; the fluidizing air inlet is consistent with the tangent direction of the air duct. In the specific implementation process, the spiral-shaped air duct can be provided with only one circle or multiple circles. It is sufficient that the fluidizing air inlet is consistent with the tangent direction of the air duct.

[0055] like Figure 3 As shown, a second spiral acceleration duct is arranged at the heat exchange air duct. The second spiral acceleration duct comprises a spiral duct and a heat exchange air inlet located at the side of the duct; the heat exchange air inlet is consistent with the tangent direction of the duct.

[0056] Specifically, the spiral acceleration air duct can make the fluidizing air obtain more uniform and accelerated flow characteristics before entering the heat exchange chamber, so that the wet sludge material can be better suspended and mixed. Accelerated and uniform fluidizing air helps to improve the heat exchange efficiency between the sludge and the hot air, thereby improving the drying efficiency. Uniform fluidizing air can reduce the wear on the inner wall of the equipment and extend the service life of the equipment. The design of the spiral acceleration air duct can be one or more circles, which provides design flexibility and can adjust the number of duct circles according to actual needs to achieve the best effect. In the specific implementation process, CFD simulation in the control system can also be used to help analyze and optimize the design of the fluidizing air duct, achieve a more reasonable flow field distribution, and improve the performance of the overall system. By optimizing the flow of fluidizing air, the flying and diffusion of dust can be reduced, and the impact on the environment and operators can be reduced.

[0057] A bracket 7 is provided at the bottom of the heat exchange chamber of the fluidized bed sludge dryer; the fluidizing air box 3 is provided in the bottom space of the fluidized bed sludge dryer formed by the bracket 7. A fluidizing fan is provided in the fluidizing air box 3. An ash discharge hole 4 is provided at the bottom of the fluidizing air box 3. Specifically, the fluidizing air box is located in the bottom space of the fluidized bed sludge dryer formed by the bracket. A fluidizing fan is installed in the fluidizing air box for generating fluidizing air. An ash discharge hole is provided at the bottom of the fluidizing air box for discharging sludge particles. A fluidizing air cap is provided on the top of the fluidizing air box to prevent wet sludge from leaking into the fluidizing air box. The ash discharge hole is provided at the bottom of the fluidizing air box to allow a small amount of leaked sludge particles to be discharged from the dryer. The fluidizing air cap can effectively prevent wet sludge from entering the fluidizing air box and protect the fluidizing fan from being damaged by sludge. The ash discharge hole at the bottom provides convenience for cleaning the leaked sludge and helps to keep the inside of the dryer clean. The setting of fluidizing bellows and fluidizing fans can ensure uniform distribution of hot air and improve the drying efficiency of sludge. The design of ash discharge holes makes equipment maintenance easier, and can quickly remove accumulated sludge and reduce the risk of equipment failure. By preventing sludge from directly contacting the fan, the wear of the fan can be reduced and its service life can be extended. Effective sludge leakage control helps reduce environmental pollution and meets environmental protection requirements.

[0058] Furthermore, an insulation layer 10 is provided on the outer wall of the heat exchange chamber of the fluidized bed sludge dryer. The insulation layer can effectively reduce the heat loss inside the heat exchange chamber and maintain the thermal efficiency inside the dryer. Good insulation performance means that the equipment can achieve the same drying effect with lower energy consumption, thereby saving energy. For operators, the insulation layer can reduce the surface temperature of the outer wall and avoid the risk of scalding. Reduce the heat radiation of the equipment to the surrounding environment and improve the working environment. The insulation layer can protect the metal outer wall of the heat exchange chamber from high temperature and extend the service life of the equipment. By reducing the fluctuation of the outer wall temperature, the thermal stress caused by thermal expansion and contraction is reduced, and the mechanical fatigue of the equipment is reduced. The insulation material usually has a certain sound absorption performance, which can reduce the noise generated when the equipment is running. The insulation layer helps to maintain the temperature stability of the heat exchange chamber and improve the stability of the entire drying system. Since the equipment life is extended and the operation is more stable, the maintenance cost will also be reduced accordingly.

[0059] In summary, the present invention provides a sludge drying treatment method and device thereof, wherein the wet sludge material to be treated is conveyed to the heat exchange chamber of the fluidized bed sludge dryer through a wet sludge screw conveyor; the fluidized air is distributed to the fluidized air hood through the fluidized air inlet and the fluidized air bellows, and the fluidized 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; the heat exchange air enters the heat exchange chamber through the heat exchange air duct, so that the wet sludge material in the suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume setting of the fluidized air and the heat exchange air is obtained after being predicted by computational fluid dynamics simulation; the heat exchange flue gas and the sludge suspension layer perform heat exchange to form sludge drying particles. The present invention can achieve the technical effect of improving the sludge drying treatment efficiency and reducing energy consumption by adjusting the air volume of the fluidized air and the heat exchange air.

[0060] However, those skilled in the art should understand that various improvements can be made to the sludge drying treatment method and 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. A sludge drying method, characterized in that: include, The wet sludge material to be treated is conveyed to the heat exchange chamber of the fluidized bed sludge dryer by means of a wet sludge screw conveyor; 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, so that the wet sludge material enters a suspended state; The heat exchange air is allowed to enter the heat exchange chamber through the heat exchange air duct, so that the wet sludge material in a suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume settings of the fluidizing air and the heat exchange air are obtained after being predicted by computational fluid dynamics simulation; The heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles.

2. The sludge drying method according to claim 1, characterized in that: The method for predicting the air volume of the fluidizing air and the heat exchange air by computational fluid dynamics simulation includes: Establish a physical model of the fluidized bed sludge dryer; use computational fluid dynamics simulation software to establish a gas-solid two-phase flow model, and use a turbulence model to describe the turbulent flow characteristics of the fluid; Meshing the physical model of the fluidized bed sludge dryer and setting simulation boundary conditions; Use computational fluid dynamics simulation software to simulate and calculate the root system simulation results; and optimize according to the results; The optimized computational fluid dynamics simulation model is used to predict the air volumes of the fluidizing air and the heat exchange air.

3. The sludge drying method according to claim 1, characterized in that: The air volume ratio of the fluidizing air to the heat exchange air is 5:

5.

4. The sludge drying method according to claim 1, characterized in that: In the step of distributing the fluidizing air to the fluidizing air hood through the fluidizing air inlet and the fluidizing air box, the fluidizing air enters the fluidizing air inlet through the first spiral acceleration air duct.

5. The sludge drying method according to claim 4, characterized in that: The first spiral accelerating air duct comprises a spiral-shaped air duct and a fluidizing air inlet located on the side of the air duct; the fluidizing air inlet is consistent with the tangent direction of the air duct.

6. The sludge drying method according to claim 1, characterized in that: In the step of allowing the heat exchange air to enter the heat exchange chamber through the heat exchange air duct, the heat exchange air enters the heat exchange air duct through the second spiral acceleration air duct.

7. The sludge drying method according to claim 5, characterized in that: The fluidizing air inlet is arranged on the side of the fluidizing air box; and a fluidizing fan is arranged in the fluidizing air box.

8. The sludge drying method according to claim 7, characterized in that: An ash discharge hole is arranged at the bottom of the fluidizing wind box.

9. The sludge drying method according to claim 8, characterized in that: A bracket is arranged at the bottom of the fluidized bed sludge dryer; the fluidizing bellows is arranged in the bottom space of the fluidized bed sludge dryer formed by the bracket.

10. A sludge drying treatment device, characterized in that: include, A conveying unit, used for conveying the wet sludge material to be treated to the heat exchange chamber of the fluidized bed sludge dryer through a wet sludge screw conveyor; A fluidizing unit, used for distributing fluidizing air to a fluidizing air hood through a fluidizing air inlet and a fluidizing air wind box, wherein the fluidizing air hood blows hot air vertically upward from the bottom of the heat exchange chamber evenly toward the wet sludge material to be treated, so that the wet sludge material enters a suspended state; The heat exchange unit is used to allow heat exchange air to enter the heat exchange chamber through a heat exchange air duct, so that the wet sludge material in a suspended state enters a rotating suspended state and forms a boiling sludge flow layer; wherein the heat exchange air duct is arranged on one side of the heat exchange chamber; wherein the air volume settings of the fluidizing air and the heat exchange air are obtained after prediction through computational fluid dynamics simulation; the heat exchange flue gas exchanges heat with the sludge suspension layer to form sludge drying particles.

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