Wastewater drying bed

Abstract

The invention discloses a waste water drying bed, which comprises a tower body provided with a drying cavity, an air outlet and an air inlet, and the air outlet and the air inlet are respectively communicated with the drying cavity; the particle conveying pipeline comprises an inlet and an outlet, and the outlet of the particle conveying pipeline is connected with the tower body and communicated with the drying cavity; the particle storage structure is connected with an inlet of the particle conveying pipeline; one end of the gas conveying pipeline is connected with the particle conveying pipeline; and the gas conveying pipeline can convey compressed air into the drying cavity through the particle conveying pipeline to offset air pressure at an outlet of the particle conveying pipeline, so that the particle storage structure can convey standby inert particles into the drying cavity. The invention provides a wastewater drying bed to solve the problem that an existing wastewater drying bed cannot be maintained online.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment equipment, and more specifically, to a wastewater drying bed. Background Art

[0002] At present, in the field of wastewater drying beds, it is necessary to treat high-salt wastewater with complex components. The main process used is to send high-temperature hot air into the drying bed to provide the necessary heat source for wastewater drying. The wastewater is evenly sprayed on the surface of the inert particles in the drying bed through a nozzle or a liquid distribution pipe. After sufficient contact and drying with the hot air, the slurry forms solids that are evenly attached to the surface of the inert particles. The hot air blows the particles, causing them to grind each other, and the solid slurry becomes dust and is carried out of the drying bed by the hot air.

[0003] However, there are still some shortcomings in the traditional process. For example, the inert particles in the drying bed grind against each other under the blowing of hot air, which will cause the particle size of the inert particles to wear down over time, resulting in a decrease in the differential pressure in the drying bed and a deterioration in the fluidization effect of the inert particles. In the traditional process, it is impossible to add inert particles without stopping the drying bed, which leads to the problem that the drying bed device cannot be maintained online. If maintenance is required, the drying bed needs to be shut down, and after the bed temperature of the drying bed drops to a suitable temperature, the entrance door is opened to add inert particles. This process will cause the operation of the drying bed to be interrupted, and the continuity of wastewater treatment cannot be guaranteed. It also leads to problems such as long maintenance time and high labor intensity during daily maintenance.

[0004] Therefore, there is an urgent need for a wastewater drying bed device capable of adding inert particles online to solve the above problems. Summary of the invention

[0005] In view of this, the purpose of the present application is to propose a wastewater drying bed to solve the problem that the existing wastewater drying bed cannot be maintained online.

[0006] Based on the above purpose, the present application provides a wastewater drying bed, comprising:

[0007] A tower body, wherein the tower body is provided with a drying chamber and an air outlet and an air inlet respectively connected to the drying chamber;

[0008] A particle delivery pipeline, the particle delivery pipeline comprises an inlet and an outlet, the outlet of the particle delivery pipeline is connected to the tower body and communicates with the drying chamber;

[0009] a particle storage structure connected to the inlet of the particle delivery pipeline;

[0010] A gas delivery pipeline, one end of which is connected to the particle delivery pipeline;

[0011] The gas delivery pipe can deliver compressed air to the drying chamber through the particle delivery pipe to offset the wind pressure at the outlet of the particle delivery pipe, so that the particle storage structure can deliver spare inert particles to the drying chamber.

[0012] Optionally, there are multiple particle storage structures, and the multiple particle storage structures are respectively connected to the particle transport pipeline; the particle sizes of the inert particles stored in the multiple particle storage structures may be the same or different.

[0013] Optionally, the particle delivery pipeline is inclined; the height of the inlet of the particle delivery pipeline is higher than the height of the outlet of the particle delivery pipeline; the height of the outlet of the gas delivery pipeline is higher than the height of the outlet of the particle delivery pipeline.

[0014] Optionally, along the conveying direction of the particle conveying pipeline, the particle storage structure is located in the upstream direction of the gas conveying pipeline, or the particle storage structure is located in the downstream direction of the gas conveying pipeline.

[0015] Optionally, a wastewater outlet pipe is provided in the drying chamber; and the height of the outlet of the particle transport pipe is higher than the height of the outlet of the wastewater outlet pipe.

[0016] Optionally, a porous air distribution plate is provided on one side of the drying chamber close to the air inlet, and a grille plate is provided on one side of the drying chamber close to the air outlet; the outlet of the wastewater outlet pipe is located between the porous air distribution plate and the grille plate.

[0017] Optionally, a first control valve is provided at the connection between the particle storage structure and the particle delivery pipeline, for controlling the on-off connection between the particle storage structure and the particle delivery pipeline; a second control valve is provided at the connection between the gas delivery pipeline and the particle delivery pipeline, for controlling the on-off connection between the gas delivery pipeline and the particle delivery pipeline.

[0018] Optionally, the first control valve and the second control valve are at least one of a pneumatic valve and an electric valve.

[0019] Optionally, the tower body is further provided with a particle position sensor for detecting the fluidization degree of particles in the drying chamber and an air pressure sensor for detecting the air pressure difference in the drying chamber.

[0020] Optionally, the wastewater drying bed further comprises a general control unit, and the particle position sensor, the air pressure sensor, the particle storage structure and the gas delivery pipeline are respectively connected to the general control unit;

[0021] The overall control unit can control the particle storage structure and the opening and closing of the gas delivery pipeline and the particle delivery pipeline according to the data detected by the particle position sensor and the air pressure sensor.

[0022] From the above, it can be seen that the wastewater drying bed provided by the present application has the following advantages compared with the prior art: by adding a particle storage structure and a gas delivery pipeline to the tower body of the wastewater drying bed, the hot air pressure in the wastewater drying bed is offset by compressed air, so that while the wastewater drying bed is continuously running, spare inert particles can be continuously and accurately added to the wastewater drying bed, thereby achieving the purpose of online addition of spare inert particles and online maintenance, reducing the maintenance frequency, thereby ensuring the continuous and stable operation of the wastewater drying bed, ensuring that the wastewater can be treated in time, ensuring the efficiency of wastewater treatment, and can greatly reduce maintenance time, reduce labor intensity and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above-mentioned features and technical advantages of the present application will become clearer and easier to understand through the following description of its embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of the wastewater drying bed used in the specific embodiment of the present application.

[0025] The reference numerals are:

[0026] 1: air outlet; 2: particle storage structure; 3: first control valve; 4: gas delivery pipeline; 41: second control valve; 5: tower body; 51: drying chamber; 52: particle delivery pipeline; 6: porous air distribution plate; 7: air inlet; 8: wastewater outlet pipe; 9: grille plate; 10: particle level sensor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings. The words "inside" and "outside" used refer to the direction toward or away from the geometric center of a specific component, respectively.

[0028] Figure 1 Schematic diagram of the end sealing assembly used in the specific embodiment of the present application. Figure 1 As shown, a wastewater drying bed provided in the present application includes: a tower body 5, a particle conveying pipeline 52, a particle storage structure 2 and a gas conveying pipeline 4.

[0029] The tower body 5 is provided with a drying chamber 51 and an air outlet 1 and an air inlet 7 respectively connected to the drying chamber 51; in one embodiment of the present application, the tower body 5 is a can-shaped structure, the air outlet 1 is provided at the top of the can-shaped structure, and the air inlet 7 is provided at the bottom of the can-shaped structure. The air outlet 1 and the air inlet 7 can also be provided on the side of the can-shaped structure, and the position of the air outlet 1 is higher than the position of the air inlet 7.

[0030] The can-shaped structure has a cavity inside, which is the drying chamber 51. Inert particles for wastewater treatment are arranged in the drying chamber 51. The air inlet 7 is used to connect with an external heat source device, which is used to transport hot air into the drying chamber 51. The hot air enters the drying chamber 51 through the air inlet 7 and leaves the drying chamber 51 through the air outlet 1.

[0031] The particle delivery pipe 52 includes an inlet and an outlet, the outlet of the particle delivery pipe 52 is connected to the tower body 5 and communicates with the drying chamber 51; the particle storage structure 2 is connected to the inlet of the particle delivery pipe 52; the particle delivery pipe 52 is used to establish a delivery channel between the particle storage structure 2 and the drying chamber 51. The particle storage structure 2 includes but is not limited to a particle storage tank for storing spare inert particles. When it is necessary to transport inert particles into the drying chamber 51, the spare inert particles in the particle storage structure 2 can enter the drying chamber 51 through the particle delivery pipe 52 to replenish the inert particles.

[0032] One end of the gas delivery pipe 4 is connected to the particle delivery pipe 52, and the gas delivery pipe 4 can deliver compressed air to the drying chamber 51 through the particle delivery pipe 52 to offset the wind pressure at the outlet of the particle delivery pipe 52. The gas delivery pipe 4 is used to deliver compressed air to the drying chamber 51, and the other end of the gas delivery pipe 4 is connected to an external air supply device, which includes but is not limited to an air compressor. When it is necessary to deliver inert particles to the drying chamber 51, the gas delivery pipe 4 can deliver compressed air to the drying chamber 51 through the particle delivery pipe 52 to offset the wind pressure at the outlet of the particle delivery pipe 52, so that the particle storage structure 2 can deliver spare inert particles to the drying chamber 51.

[0033] The wastewater treatment process of the wastewater drying bed is as follows: the heat source device delivers hot air to the drying chamber 51 through the air inlet 7, and the hot air enters the drying chamber 51 through the air inlet 7, providing the necessary heat source for wastewater drying. After the hot air enters the wastewater drying bed through the air inlet 7, the inert particles in the drying chamber 51 are in a fluidized state, and the wastewater is sprayed evenly on the surface of the inert particles in the drying chamber 51 through a nozzle or a liquid distribution pipe, and heat and mass exchange is carried out with the high-temperature hot air, so that the wastewater and the hot air are fully contacted and dried, and the slurry forms a solid and evenly adheres to the surface of the inert particles. The hot air blows the particles to grind each other, and the dried slurry is ground by collision between the inert particles, and becomes powder and falls off the surface of the inert particles. The solid slurry becomes dust and is then carried by the hot air to leave the wastewater drying bed from the air outlet 1.

[0034] During the drying process, the inert particles grind against each other under the blowing of hot air, which will cause the particle size of the inert particles to wear down over a long period of time, resulting in a decrease in the differential pressure in the drying chamber 51 and a deterioration in the fluidization effect of the inert particles. At this time, it is necessary to replenish the drying chamber 51 with spare inert particles, and add an appropriate amount of spare inert particles according to demand without stopping the wastewater drying bed. The adding method is: first open the channel between the gas delivery pipe 4 and the particle delivery pipe 52, and deliver the compressed air generated by the air compressor to the particle delivery pipe 52 through the gas delivery pipe 4, and then deliver the compressed air to the drying chamber 51 through the particle delivery pipe 52 to offset the hot air pressure at the outlet of the particle delivery pipe 52. Then open the channel between the particle storage structure 2 and the particle delivery pipe 52, so that the spare inert particles in the particle storage structure 2 can enter the drying chamber 51 through the particle delivery pipe 52 to replenish the inert particles in the drying chamber 51. After adding a suitable amount of spare inert particles, the passage between the particle storage structure 2 and the particle delivery pipe 52 is first closed, and then the passage between the gas delivery pipe 4 and the particle delivery pipe 52 is closed to complete the online addition of the spare inert particles.

[0035] By adopting the above-mentioned wastewater drying bed, a particle storage structure 2 and a gas delivery pipeline 4 are added to the tower body 5 of the wastewater drying bed, and compressed air is used to offset the hot air pressure in the wastewater drying bed. Therefore, while the wastewater drying bed is continuously running, spare inert particles can be continuously and accurately added to the wastewater drying bed, thereby achieving the purpose of online addition of inert particles and online maintenance, reducing the maintenance frequency, thereby ensuring the continuous and stable operation of the wastewater drying bed, ensuring that the wastewater can be treated in time, ensuring the efficiency of wastewater treatment, and can greatly reduce maintenance time, reduce labor intensity and other problems.

[0036] According to different needs, spare inert particles of the same or different particle sizes can be added to the drying chamber 51. Optionally, there are multiple particle storage structures 2, and the multiple particle storage structures 2 are respectively connected to the particle delivery pipe 52; the particle sizes of the inert particles stored in the multiple particle storage structures 2 can be the same or different. The particle storage structure 2 can be set to multiple according to different needs, and different particle storage structures 2 can store spare inert particles of corresponding particle sizes according to the particle size of the inert particles in the drying chamber 51. Spare inert particles of different particle sizes can also be supplemented according to the loss in the drying chamber 51. Through multiple particle storage structures 2, the online addition of inert particles can be completed better and more accurately.

[0037] Optionally, the particle delivery pipe 52 is inclined; the height of the inlet of the particle delivery pipe 52 is higher than the height of the outlet of the particle delivery pipe 52; the height of the outlet of the gas delivery pipe 4 is higher than the height of the outlet of the particle delivery pipe 52. The particle delivery pipe 52 is installed in the above manner. When the passage between the particle storage structure 2 and the particle delivery pipe 52 is opened, the spare inert particles can move along the particle delivery pipe 52 to the drying chamber 51 based on the gravity. At the same time, when the passage between the gas delivery pipe 4 and the particle delivery pipe 52 is opened, the compressed air delivered by the gas delivery pipe 4 will form an air pressure zone in the particle delivery pipe 52, thereby further driving the spare inert particles to move along the particle delivery pipe 52 into the drying chamber 51. The gravity of the particles and the air pressure of the compressed air are fully utilized to drive the movement of the spare inert particles. There is no need to set up an additional driving device for the movement of the spare inert particles, which reduces the number of devices, and also reduces energy consumption and costs.

[0038] Optionally, along the conveying direction of the particle conveying pipe 52, the particle storage structure 2 is located in the upstream direction of the gas conveying pipe 4, or the particle storage structure 2 is located in the downstream direction of the gas conveying pipe 4. In the configuration mode where the particle storage structure 2 is located in the upstream direction of the gas conveying pipe 4, when the passage between the gas conveying pipe 4 and the particle conveying pipe 52 is opened first, compressed air can form an air pressure zone in the pipe section between the outlet of the gas conveying pipe 4 and the outlet of the particle conveying pipe 52 in the particle conveying pipe 52, which offsets the hot air pressure at the outlet of the particle conveying pipe 52. When the spare inert particles move to the air pressure zone, they can be energized by the compressed air to speed up the speed of entering the drying chamber 51, thereby improving the adding efficiency.

[0039] When the particle storage structure 2 is located downstream of the gas delivery pipe 4, when the channel between the gas delivery pipe 4 and the particle delivery pipe 52 is opened, compressed air can form an air pressure zone in the entire pipe section of the particle delivery pipe 52, which offsets the hot air pressure at the outlet of the particle delivery pipe 52. When the spare inert particles are moved out of the particle storage structure 2, they can be energized by the compressed air so that the spare inert particles can enter the drying chamber 51 faster.

[0040] In order to allow the newly added spare inert particles to be in contact with the wastewater more fully, a wastewater outlet pipe 8 is optionally provided in the drying chamber 51; the height of the outlet of the particle conveying pipe 52 is higher than the height of the outlet of the wastewater outlet pipe 8. After the newly added spare inert particles enter the drying chamber 51 from the outlet of the particle conveying pipe 52, they will fall a certain distance due to gravity. At this time, the wastewater outlet pipe 8 can be in contact with the spare inert particles more fully, so that they can be better attached to the surface of the spare inert particles. At the same time, the hot air blowing from bottom to top can also stir the falling spare inert particles faster, so that the newly entered spare inert particles enter the fluidized state, accelerate the heat and mass exchange, and collide with other inert particles faster during the falling process of the spare inert particles, so that the powder on other inert particles falls off from the surface of the inert particles.

[0041] Optionally, a porous air distribution plate 6 is provided on one side of the drying chamber 51 near the air inlet 7, and a grille plate 9 is provided on one side of the drying chamber 51 near the air outlet 1; the outlet of the wastewater outlet pipe 8 is located between the porous air distribution plate 6 and the grille plate 9. The porous air distribution plate 6 can make the hot air entering the drying chamber 51 from the air inlet 7 be more evenly distributed in the drying chamber 51, so that the effects of the hot air received by various parts in the drying chamber 51 are the same and similar, avoiding the hot air blowing only on a certain concentrated area, resulting in the concentration of hot air. At the same time, the porous air distribution plate 6 can also play a buffering role, avoiding the hot air entering from the air inlet 7 from having too fast a wind speed, blowing away the inert particles, and affecting the fluidization effect of the inert particles, so as to ensure smoother heat and mass exchange.

[0042] The grid plate 9 can prevent the inert particles from being blown out of the drying chamber 51, thereby ensuring that the wastewater treatment by the inert particles can be continued. At the same time, the grid plate 9 can further prevent other debris from entering the subsequent equipment through the air outlet 1, thereby affecting the operation of the subsequent equipment.

[0043] In order to better control the added spare inert particles, optionally, a first control valve 3 is provided at the connection between the particle storage structure 2 and the particle delivery pipeline 52, which is used to control the connection between the particle storage structure 2 and the particle delivery pipeline 52; a second control valve 41 is provided at the connection between the gas delivery pipeline 4 and the particle delivery pipeline 52, which is used to control the connection between the gas delivery pipeline 4 and the particle delivery pipeline 52. By setting the first control valve 3 and the second control valve 41, the addition of spare inert particles can be effectively controlled. When the addition of spare inert particles is not required, the first control valve 3 and the second control valve 41 are in a closed state to prevent the spare inert particles and compressed air from entering the drying chamber 51, so that the wastewater can be stably treated in the drying chamber 51.

[0044] When it is necessary to add spare inert particles to the drying chamber 51, first open the second control valve 41 to open the passage between the gas delivery pipe 4 and the particle delivery pipe 52, deliver compressed air to the particle delivery pipe 52 through the gas delivery pipe 4, and then deliver compressed air to the drying chamber 51 through the particle delivery pipe 52 to offset the hot air pressure at the outlet of the particle delivery pipe 52. Then open the first control valve 3 to allow the spare inert particles in the particle storage structure 2 to enter the drying chamber 51 through the particle delivery pipe 52 to replenish the inert particles in the drying chamber 51.

[0045] Optionally, the first control valve 3 and the second control valve 41 are at least one of pneumatic valves and electric valves. When the first control valve 3 and the second control valve 41 are pneumatic valves, the first control valve 3 and the second control valve 41 can share an air compressor with the gas delivery pipeline 4. For more accurate control, the first control valve 3 and the second control valve 41 can also be independently equipped with an air compressor, which is not specifically limited in this application. Through the setting of the pneumatic valve, it can respond at a faster speed, can quickly open and close the corresponding channel, and has a stronger pressure-bearing capacity. When the first control valve 3 and the second control valve 41 are electric valves, more accurate control can be achieved and control errors can be reduced.

[0046] During the drying process, the inert particles grind against each other under the blowing of hot air, which will cause the particle size of the inert particles to wear down over a long period of time, resulting in a decrease in the differential pressure in the drying chamber 51 and a deterioration in the fluidization effect of the inert particles. In order to better and more accurately know the conditions in the drying chamber 51, optionally, a particle position sensor 10 for detecting the fluidization degree of the particles in the drying chamber 51 and an air pressure sensor for detecting the air pressure difference in the drying chamber are also provided on the tower body 5. The fluidization effect of the inert particles and the change in the differential pressure in the bed can be known through the particle position sensor 10 and the air pressure sensor. According to the changes in the values ​​displayed by the particle position sensor 10 and the air pressure sensor, the corresponding spare inert particles can be added according to the corresponding parameters without stopping the wastewater drying bed.

[0047] The addition of spare inert particles can be done manually, such as manually opening the first control valve 3 and the second control valve 41. In order to further realize automated control, the wastewater drying bed optionally also includes a general control unit, and the particle position sensor 10, the air pressure sensor, the particle storage structure 2 and the gas delivery pipeline 4 are respectively connected to the general control unit; the general control unit can control the opening and closing of the particle storage structure 2 and the gas delivery pipeline 4 and the particle delivery pipeline 52 according to the data detected by the particle position sensor 10 and the air pressure sensor. The general control unit can be connected to the first control valve 3 and the second control valve 41, and then according to the data detected by the particle position sensor 10 and the air pressure sensor, the corresponding parameters of the spare inert particles to be added, such as what particle size to add, how much to add, etc., are calculated, and the corresponding spare inert particles are added according to the corresponding parameters, thereby ensuring the continuous and stable operation of the wastewater drying bed and ensuring that the wastewater can be treated in time.

[0048] The manual adding method and the automatic adding method can be used in combination. For example, when the automatic adding method fails, the manual adding method can be used for adding; or, when an error occurs in the automatic adding method, the manual adding method can be used for correction and addition.

[0049] The following further introduces the use process of the wastewater drying bed.

[0050] The wastewater treatment process of the wastewater drying bed is as follows: the heat source device delivers hot air into the drying chamber 51 through the air inlet 7, and the hot air enters the drying chamber 51 through the air inlet 7 to provide the necessary heat source for wastewater drying.

[0051] After the hot air enters the wastewater drying bed through the air inlet 7, the inert particles in the drying chamber 51 are in a fluidized state. The wastewater is sprayed evenly on the surface of the inert particles in the drying chamber 51 through the nozzle or liquid dispensing port of the wastewater outlet pipe 8, and heat and mass exchange is performed with the high-temperature hot air, so that the wastewater and the hot air are fully contacted and dried, and the slurry forms a solid and evenly adheres to the surface of the inert particles. The particles are blown by the hot air, so that the particles grind each other. After the dried slurry is ground by the collision between the inert particles, it becomes powder and falls off from the surface of the inert particles. The solid slurry becomes dust and is then carried by the hot air to leave the wastewater drying bed from the air outlet 1.

[0052] During the drying process, the inert particles grind against each other under the blowing of hot air, which will cause the particle size of the inert particles to be worn down over time, resulting in a decrease in the differential pressure in the drying chamber 51 and a deterioration in the fluidization effect of the inert particles. At this time, it is necessary to add spare inert particles to the drying chamber 51. Without stopping the wastewater drying bed, an appropriate amount of spare inert particles can be added according to demand. The added spare inert particles can be particles of the same particle size or particles of different particle sizes, and can be added adaptively according to different needs.

[0053] The adding method is to first open the passage between the gas delivery pipeline 4 and the particle delivery pipeline 52, that is, open the second control valve 41. If the second control valve 41 is a pneumatic valve, it can share an air compressor with the gas delivery pipeline 4. After opening the second control valve 41, the compressed air generated by the air compressor is delivered to the particle delivery pipeline 52 through the gas delivery pipeline 4, and then the compressed air is delivered to the drying chamber 51 through the particle delivery pipeline 52 to offset the hot air pressure at the outlet of the particle delivery pipeline 52.

[0054] Then open the passage between the particle storage structure 2 and the particle delivery pipeline 52, that is, open the first control valve 3. If the first control valve 3 is a pneumatic valve, it can also share an air compressor with the gas delivery pipeline 4. After opening the first control valve 3, the spare inert particles in the particle storage structure 2 can enter the drying chamber 51 through the particle delivery pipeline 52 to replenish the inert particles in the drying chamber 51. After adding a suitable number of spare inert particles, first close the passage between the particle storage structure 2 and the particle delivery pipeline 52, that is, first close the first control valve 3, then close the passage between the gas delivery pipeline 4 and the particle delivery pipeline 52, and finally close the second control valve 41 to complete the online addition of spare inert particles.

[0055] From the above description and practice, it can be seen that the wastewater drying bed provided by the present application has the following advantages compared with the prior art: by adding a particle storage structure and a gas delivery pipeline to the tower body of the wastewater drying bed, the hot air pressure in the wastewater drying bed is offset by compressed air, so that while the wastewater drying bed is continuously running, spare inert particles can be continuously and accurately added to the wastewater drying bed, thereby achieving the purpose of online addition of inert particles and online maintenance, reducing the maintenance frequency, thereby ensuring the continuous and stable operation of the wastewater drying bed, ensuring that the wastewater can be treated in time, ensuring the efficiency of wastewater treatment, and can greatly reduce maintenance time, reduce labor intensity and other problems.

[0056] A person skilled in the art should understand that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present application should be included in the protection scope of the present application.

Claims

1. A wastewater drying bed, characterized in that: include: A tower body, wherein the tower body is provided with a drying chamber and an air outlet and an air inlet respectively connected to the drying chamber; A particle delivery pipeline, the particle delivery pipeline comprises an inlet and an outlet, the outlet of the particle delivery pipeline is connected to the tower body and communicates with the drying chamber; a particle storage structure connected to the inlet of the particle delivery pipeline; A gas delivery pipeline, one end of which is connected to the particle delivery pipeline; The gas delivery pipe can deliver compressed air to the drying chamber through the particle delivery pipe to offset the wind pressure at the outlet of the particle delivery pipe, so that the particle storage structure can deliver spare inert particles to the drying chamber.

2. The wastewater drying bed according to claim 1, characterized in that: There are multiple particle storage structures, and the multiple particle storage structures are respectively connected to the particle delivery pipeline; the particle sizes of the inert particles stored in the multiple particle storage structures may be the same or different.

3. The wastewater drying bed according to claim 1, characterized in that: The particle conveying pipeline is arranged at an inclination; the height of the inlet of the particle conveying pipeline is higher than the height of the outlet of the particle conveying pipeline; the height of the outlet of the gas conveying pipeline is higher than the height of the outlet of the particle conveying pipeline.

4. The wastewater drying bed according to claim 1, characterized in that: Along the conveying direction of the particle conveying pipeline, the particle storage structure is located in the upstream direction of the gas conveying pipeline, or the particle storage structure is located in the downstream direction of the gas conveying pipeline.

5. The wastewater drying bed according to claim 1, characterized in that: A wastewater outlet pipe is arranged in the drying chamber; the height of the outlet of the particle conveying pipeline is higher than the height of the outlet of the wastewater outlet pipe.

6. The wastewater drying bed according to claim 5, characterized in that: A porous air distribution plate is arranged on one side of the drying chamber close to the air inlet, and a grille plate is arranged on one side of the drying chamber close to the air outlet; the outlet of the wastewater outlet pipe is located between the porous air distribution plate and the grille plate.

7. The wastewater drying bed according to claim 1, characterized in that: A first control valve is provided at the connection between the particle storage structure and the particle delivery pipeline, which is used to control the connection between the particle storage structure and the particle delivery pipeline; a second control valve is provided at the connection between the gas delivery pipeline and the particle delivery pipeline, which is used to control the connection between the gas delivery pipeline and the particle delivery pipeline.

8. The wastewater drying bed according to claim 7, characterized in that: The first control valve and the second control valve are at least one of pneumatic valves and electric valves.

9. The wastewater drying bed according to any one of claims 1 to 8, characterized in that: The tower body is also provided with a particle position sensor for detecting the fluidization degree of particles in the drying chamber and an air pressure sensor for detecting the air pressure difference in the drying chamber.

10. The wastewater drying bed according to claim 9, characterized in that: The wastewater drying bed further comprises a general control unit, and the particle position sensor, the air pressure sensor, the particle storage structure and the gas delivery pipeline are respectively connected to the general control unit; The overall control unit can control the particle storage structure and the opening and closing of the gas delivery pipeline and the particle delivery pipeline according to the data detected by the particle position sensor and the air pressure sensor.

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