A worm treatment sludge reactor

Abstract

The application discloses an earthworm processing sludge reaction bed and belongs to the sludge processing field.The reaction bed comprises a reaction bed body, supporting legs arranged at the bottom of the reaction bed body and a sunshade plate arranged above the reaction bed body; the inside of the reaction bed body is sequentially provided with a drainage layer, a drainage and ventilation layer, an earthworm habitat layer and a sludge layer from bottom to top; one end of the reaction bed body is fixedly provided with a drainage valve in communication with the drainage layer, and the bottom wall of the drainage layer is inclined downward from the side to the end close to the drainage valve; and the drainage and ventilation layer is composed of gravel and sand. Through the inclined bottom wall design of the drainage layer and the gravel and sand combination of the drainage and ventilation layer, the excess moisture in the sludge layer can be quickly drained, the deterioration of the living environment of earthworms, the decrease of the processing efficiency and the secondary pollution risk caused by the accumulated water can be avoided; meanwhile, the pore structure of the drainage and ventilation layer can guarantee the air circulation in the inside of the reaction bed, provide a suitable aerobic environment for the earthworms and microorganisms and improve the sludge processing effect.

Description

Technical Field

[0001] This application relates to the field of sludge treatment technology, specifically an earthworm-treated sludge reaction bed. Background Technology

[0002] With the acceleration of urbanization and industrial development, the amount of sewage sludge produced is increasing daily. Sludge contains large amounts of organic matter, heavy metals, and pathogens, which can pose a serious threat to the environment and human health if not properly treated. Earthworm treatment of sewage sludge is an environmentally friendly and efficient method. Through the ingestion, digestion, and excretion of earthworms, the sludge is transformed into nutrient-rich vermicompost, while reducing the volume of sludge and the content of harmful substances.

[0003] In the prior art, Chinese utility model patent CN208857123U discloses a device for treating sludge in an earthworm bed. This device, through a spray system (including a water supply pipe with two rows of spray holes), can uniformly spray water into the earthworm bed, ensuring the humidity requirements of the earthworms' living environment to a certain extent. However, this device lacks a drainage mechanism for the earthworm bed. In practical applications, when the spray water volume is not properly controlled or the ambient humidity is high, excess water cannot be drained in time and will accumulate at the bottom of the earthworm bed or in the substrate, causing excessive humidity in the earthworms' living environment, affecting their respiration and activity, and even leading to earthworm escape or death. Accumulated water may also damage the permeability of the sludge, inhibiting microbial activity and earthworm digestion and metabolism, prolonging the sludge treatment cycle, and reducing the system's treatment efficiency.

[0004] Therefore, this application provides an earthworm-treated sludge reaction bed to solve the above-mentioned problems. Utility Model Content

[0005] This application provides an earthworm-treated sludge reaction bed, which aims to solve the problems mentioned in the background art, such as the lack of an efficient drainage mechanism in existing earthworm bed sludge treatment devices, which easily leads to water accumulation inside the bed, deterioration of the earthworm's living environment, decrease in sludge treatment efficiency, and the risk of secondary pollution.

[0006] To achieve the above objectives, this application provides the following technical solution: an earthworm-treated sludge reaction bed, comprising a reaction bed body, support legs disposed at the bottom of the reaction bed body, and a sunshade plate disposed above the reaction bed body, wherein a spray pipe is fixedly installed at the bottom of the sunshade plate; the interior of the reaction bed body is provided with a drainage layer, a drainage and aeration layer, an earthworm habitat layer, and a sludge layer in sequence from bottom to top; a drain valve communicating with the drainage layer is fixedly installed at one end of the reaction bed body, and the bottom wall of the drainage layer slopes downward from its side towards the end near the drain valve; the drainage and aeration layer is composed of gravel and sand. Through the sloping bottom wall design of the drainage layer and the combination of gravel and sand in the drainage and aeration layer, excess water in the sludge layer can be quickly drained, avoiding water accumulation that could lead to a deterioration of the earthworm's living environment, a decrease in treatment efficiency, and the risk of secondary pollution; simultaneously, the porous structure of the drainage and aeration layer ensures air circulation inside the reaction bed, providing a suitable aerobic environment for earthworms and microorganisms, thereby improving the sludge treatment effect.

[0007] Preferably, to facilitate water flow through the drainage and ventilation layer into the drainage layer: a mesh plate is provided between the drainage layer and the drainage and ventilation layer, and the mesh plate is fixedly connected to the reaction bed body by bolts. The mesh plate, positioned between the drainage layer and the drainage and ventilation layer, effectively supports the gravel and sand in the drainage and ventilation layer, preventing them from falling into the drainage layer and blocking the drainage channels, while ensuring that water can smoothly pass through the pores of the mesh plate into the drainage layer, thus balancing structural stability and permeability.

[0008] Preferably, the earthworm habitat layer is made of a porous material. The porous material provides earthworms with a suitable habitat, and its abundant pore structure promotes the uniform distribution of air and moisture, facilitating earthworm movement and sludge ingestion within the layer. Simultaneously, it reduces the risk of habitat layer compaction, maintaining a favorable microenvironment to improve earthworm metabolic efficiency and sludge treatment rate.

[0009] Preferably, to improve the stability of the reaction bed body, four support legs are provided, which are fixedly installed at the four opposite corners of the reaction bed body. The four support legs, fixed at the four opposite corners of the reaction bed body, can evenly distribute the weight of the reaction bed and the sludge load, significantly improving the stability of the reaction bed body, avoiding tilting or overturning due to a shift in the center of gravity, and adapting to the installation requirements of different terrains.

[0010] Preferably, to improve the anti-slip effect of the support leg: an anti-slip pad is fixedly installed at the bottom of the support leg, the bottom of the anti-slip pad has anti-slip texture, and the anti-slip pad is made of rubber material. The anti-slip pad, through its rubber material and anti-slip texture design, increases the friction between the support leg and the ground, preventing the reaction bed body from sliding or shifting during spraying operations, rainy weather, or uneven ground, further improving the safety and reliability of the equipment.

[0011] Preferably, to facilitate water supply to the spray pipe: a water tank is provided on one side of the reaction bed body, and a water pump connected to the water tank is fixedly installed on the water tank. The output end of the water pump is connected to the spray pipe through a pipeline. The water tank and water pump enable automatic water supply to the spray pipe, eliminating the need for frequent manual water addition and improving operational convenience. Through pressure control of the water pump, water can be sprayed evenly from the spray pipe, maintaining suitable humidity of the sludge layer and creating favorable conditions for earthworm survival and sludge treatment.

[0012] Preferably, to increase the oxygen content inside the sludge, a ventilation mechanism is also included. This ventilation mechanism includes an air inlet pipe fixedly installed at the end of the reaction bed body away from the drain valve and communicating with the drainage layer. A ventilation fan is fixedly installed at the end of the air inlet pipe away from the reaction bed body, and the top opening of the reaction bed body forms an air outlet. The ventilation mechanism, through the ventilation fan, supplies fresh air into the reaction bed body, which can significantly increase the oxygen content of the sludge layer and the earthworm habitat layer, promote earthworm respiration and the aerobic decomposition process of microorganisms, accelerate the sludge treatment speed, and simultaneously reduce the odor produced by anaerobic fermentation, improving the surrounding environment.

[0013] This application utilizes the inclined bottom wall design of the drainage layer and the combination of gravel and sand in the drainage and aeration layer to quickly remove excess water from the sludge layer, preventing water accumulation that could lead to a deterioration of the earthworm's living environment, a decrease in treatment efficiency, and the risk of secondary pollution. At the same time, the porous structure of the drainage and aeration layer ensures air circulation inside the reaction bed, providing a suitable aerobic environment for earthworms and microorganisms, thereby improving the sludge treatment effect.

[0014] The ventilation system of this application introduces fresh air into the reaction bed through a ventilation fan, which can significantly increase the oxygen content of the sludge layer and earthworm habitat layer, promote earthworm respiration and aerobic decomposition of microorganisms, accelerate sludge treatment, reduce odors produced by anaerobic fermentation, and improve the surrounding environment. Attached Figure Description

[0015] Figure 1 A schematic diagram of a sludge treatment reaction bed using earthworms; Figure 2 for Figure 1 A schematic diagram of the other side of the structure; Figure 3 for Figure 1 Main sectional view of the structure.

[0016] In the picture: 1. Reactor bed body; 11. Drainage layer; 111. Drainage valve; 12. Drainage and ventilation layer; 13. Earthworm habitat layer; 14. Sludge layer; 15. Mesh panel; 2. Support legs; 21. Anti-slip mat; 3. Sunshade panel; 4. Spray pipe; 41. Water tank; 42. Water pump; 5. Ventilation mechanism; 51. Air inlet pipe; 52. Ventilation fan. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Example 1 This embodiment provides a sludge treatment reaction bed using earthworms, such as... Figure 1-3 As shown, the reaction bed includes a reaction bed body 1, support legs 2 located at the bottom of the reaction bed body 1, and a sunshade 3 located above the reaction bed body 1. A spray pipe 4 is fixedly installed at the bottom of the sunshade 3. The interior of the reaction bed body 1, from bottom to top, consists of a drainage layer 11, a drainage and aeration layer 12, an earthworm habitat layer 13, and a sludge layer 14. A drain valve 111 connected to the drainage layer 11 is fixedly installed at one end of the reaction bed body 1. The bottom wall of the drainage layer 11 slopes downward from its side towards the end near the drain valve 111. The drainage and aeration layer 12 is composed of gravel and sand. The particle sizes of the gravel and sand are 5-10 mm and 1-3 mm, respectively. By using the inclined bottom wall design of the drainage layer 11 and the combination of gravel and sand in the drainage and aeration layer 12, excess water in the sludge layer 14 can be quickly discharged, preventing water accumulation that could lead to a deterioration of the earthworm's living environment, reduced treatment efficiency, and the risk of secondary pollution. Simultaneously, the porous structure of the drainage and aeration layer 12 ensures air circulation within the reaction bed, providing a suitable aerobic environment for earthworms and microorganisms, thus improving sludge treatment efficiency. When water in the sludge layer 14 permeates into the drainage and aeration layer 12, the 5-10mm gravel and 1-3mm sand form multi-level permeable channels, allowing water to flow downwards into the drainage layer 11 through the gaps. The bottom wall of the drainage layer 11 is inclined towards the drain valve 111, using gravity to collect the accumulated water, which can then be discharged by opening the valve, achieving efficient water management.

[0019] To facilitate water flow through the drainage and aeration layer 12 into the drainage layer 11, a mesh plate 15 is installed between the drainage layer 11 and the drainage and aeration layer 12. The mesh plate 15 is fixedly connected to the reaction bed body 1 by bolts. The mesh plate 15 (stainless steel plate) is placed between the drainage layer 11 and the drainage and aeration layer 12, which can effectively support the gravel and sand in the drainage and aeration layer 12, preventing them from falling into the drainage layer 11 and blocking the drainage channel. At the same time, it ensures that water can flow smoothly through the pores of the mesh plate 15 into the drainage layer 11, taking into account both structural stability and water permeability. The mesh plate 15 is fixed to the inner wall of the reaction bed body 1 by bolts. Its mesh size is smaller than the minimum particle size of sand in the drainage and aeration layer 12 (1mm), which can both prevent gravel and sand from falling and allow water to permeate freely. When water seeps down the drainage and aeration layer 12, the mesh plate 15 acts as an intermediate support structure to maintain the physical separation between the upper and lower layers, ensuring the long-term stable operation of the drainage system.

[0020] The earthworm habitat layer 13 is made of porous material. This porous material (straw, sawdust, or peat moss) provides earthworms with a suitable habitat. Its rich porous structure promotes the even distribution of air and moisture, facilitating earthworm movement and sludge ingestion within the layer. It also reduces the risk of compaction, maintaining a favorable microenvironment to improve earthworm metabolic efficiency and sludge treatment rate. The pore size of the porous material is adapted to the activity habits of earthworms, allowing them to freely move between the earthworm habitat layer 13 and the sludge layer 14, ingesting sludge and excreting earthworm castings. Simultaneously, the pores allow for the infiltration of outside air and sprayed water, maintaining the humidity and oxygen content of the earthworm habitat layer 13, providing stable conditions for earthworm survival and microbial decomposition.

[0021] To improve the stability of the reactor body 1, four support legs 2 are provided, fixedly positioned at the four opposite corners of the reactor body 1. These four support legs 2 evenly distribute the weight of the reactor and the sludge load, significantly improving the stability of the reactor body 1 and preventing tilting or overturning due to a shift in the center of gravity, thus adapting to installation requirements in different terrains. The support legs 2 are symmetrically distributed in a quadrilateral shape at the four opposite corners, forming a stable support structure. Utilizing geometric principles, the weight of the reactor body 1 is evenly transferred to the ground; each support leg 2 bears vertical force, reducing single-point load pressure and ensuring the reactor remains balanced after being loaded with sludge.

[0022] To improve the anti-slip effect of the support leg 2, an anti-slip pad 21 is fixedly installed at the bottom of the support leg 2. The anti-slip pad 21 has anti-slip texture on its bottom and is made of rubber. Through its rubber material and anti-slip texture design, the anti-slip pad 21 increases the friction between the support leg 2 and the ground, preventing the reaction bed body 1 from sliding or shifting during spraying operations, rainy weather, or uneven ground, further improving the safety and reliability of the equipment. The elastic deformation capacity of the rubber material allows it to closely conform to the uneven surface of the ground, increasing the contact area; the anti-slip texture increases surface roughness and enhances grip by utilizing the principle of friction coefficient, effectively fixing the support leg 2 even on wet and slippery surfaces, ensuring the overall stability of the reaction bed.

[0023] To facilitate water supply to the spray pipe 4, a water tank 41 is installed on one side of the reaction bed body 1. A water pump 42, connected to the water tank 41, is fixedly installed on the water tank 41. The output end of the water pump 42 is connected to the spray pipe 4 via a pipe. The installation of the water tank 41 and the water pump 42 enables automatic water supply to the spray pipe 4, eliminating the need for frequent manual water addition and improving operational convenience. Through the pressure control of the water pump 42, water can be sprayed evenly from the spray pipe 4, maintaining suitable humidity in the sludge layer 14 and creating favorable conditions for earthworm survival and sludge treatment. The water pump 42 draws water from the water tank 41 and delivers it to the spray pipe 4 at the bottom of the sunshade 3 through a pipe. The spray holes on the spray pipe 4 spray water evenly onto the sludge layer 14 under water pressure. The water tank 41 can store a certain amount of water to meet the needs of periodic spraying, forming an automated humidity control system.

[0024] Example 2 Unlike Example 1, to increase the oxygen content inside the sludge, a ventilation mechanism 5 is also included. The ventilation mechanism 5 includes an air inlet pipe 51 fixedly installed at the end of the reaction bed body 1 away from the drain valve 111 and connected to the drainage layer 11. A ventilation fan 52 is fixedly installed at the end of the air inlet pipe 51 away from the reaction bed body 1. The top opening of the reaction bed body 1 forms an air outlet. The ventilation mechanism 5, through the ventilation fan 52, supplies fresh air into the reaction bed body 1, which can significantly increase the oxygen content of the sludge layer 14 and the earthworm habitat layer 13, promote earthworm respiration and the aerobic decomposition process of microorganisms, accelerate the sludge treatment speed, and reduce the odor produced by anaerobic fermentation, thus improving the surrounding environment. The ventilation fan 52 sends outside air into the drainage layer 11 through the air inlet pipe 51. The air penetrates upwards through the drainage and ventilation layer 12, the earthworm habitat layer 13, and the sludge layer 14, carrying carbon dioxide, water vapor, and other gases produced by metabolism, and is discharged from the top air outlet, forming continuous air convection to achieve oxygen replenishment and waste gas exchange inside the reaction bed.

[0025] The wiring diagram of the water pump 42 in this utility model is common knowledge in the field. Its working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the water pump 42 will not be explained in detail.

[0026] The control method of this application is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0027] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0028] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. An earthworm sludge treatment reaction bed, comprising a reaction bed body (1), a support leg (2) disposed at the bottom of the reaction bed body (1), and a sunshade plate (3) disposed above the reaction bed body (1), wherein a spray pipe (4) is fixedly installed at the bottom of the sunshade plate (3). Its features are: The interior of the reaction bed body (1) is provided with a drainage layer (11), a drainage and air-permeable layer (12), an earthworm habitat layer (13), and a sludge layer (14) from bottom to top. One end of the reaction bed body (1) is fixedly installed with a drain valve (111) that communicates with the drainage layer (11), and the bottom wall of the drainage layer (11) slopes downward from its side toward the end near the drain valve (111). The drainage and ventilation layer (12) is composed of gravel and sand.

2. The earthworm-treated sludge reaction bed according to claim 1, characterized in that: A mesh plate (15) is provided between the drainage layer (11) and the drainage and air-permeable layer (12), and the mesh plate (15) is fixedly connected to the reaction bed body (1) by bolts.

3. The earthworm-treated sludge reaction bed according to claim 1, characterized in that: The earthworm habitat layer (13) is made of porous material.

4. The earthworm-treated sludge reaction bed according to claim 1, characterized in that: The support legs (2) are provided in four parts, which are fixedly installed at the four opposite corners of the reaction bed body (1).

5. The earthworm-treated sludge reaction bed according to claim 1, characterized in that: The bottom of the support leg (2) is fixedly provided with an anti-slip pad (21), the bottom of the anti-slip pad (21) is provided with anti-slip texture, and the anti-slip pad (21) is made of rubber material.

6. The earthworm-treated sludge reaction bed according to claim 1, characterized in that: A water tank (41) is provided on one side of the reaction bed body (1). A water pump (42) connected to the water tank (41) is fixedly installed on the water tank (41). The output end of the water pump (42) is connected to the spray pipe (4) through a pipe.

7. The earthworm-treated sludge reaction bed according to claim 1, characterized in that: It also includes a ventilation mechanism (5), which includes an air inlet pipe (51) fixedly disposed at one end of the reaction bed body (1) away from the drain valve (111) and connected to the drain layer (11). A ventilation fan (52) is fixedly installed at one end of the air inlet pipe (51) away from the reaction bed body (1), and the top opening of the reaction bed body (1) forms an air outlet.

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