Multistage dispersion treatment type sludge low-carbon drying device

Abstract

The utility model discloses a multistage dispersed processing formula sludge low carbon drying device belongs to sludge treatment technical field. A multistage dispersed processing formula sludge low carbon drying device, including drying case and return air box, the drying case is mutual through with return air box, the top of return air box is provided with scattering hopper, wherein, the blanking tube of scattering hopper bottom extends to the inside of return air box, and the inside of scattering hopper is provided with split blade. To solve the existing sludge treatment after high pressure dewatering sludge under the influence of pressure can be agglomerated, this can lead to the subsequent drying process moisture not easy completely evaporates, and the sludge conveying of agglomeration is very inconvenient problem, multistage dispersion mechanism ring after ring, layer by layer progression, ensure that the sludge mass of different size, hardness is effectively broken into small granules, loose granule state greatly increased the specific surface area of sludge, makes moisture more easily migrates to the surface and evaporates.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, specifically a multi-stage decentralized sludge low-carbon drying device. Background Technology

[0002] Rural sewage treatment equipment generates a large amount of sludge during the process of treating decentralized rural domestic sewage. This sludge has a high water content, organic matter content, and persistent organic matter content. Furthermore, after high-pressure dewatering, the existing sludge treatment process causes the sludge to clump together under pressure. This makes it difficult for the water to evaporate completely during the subsequent drying process, and the transportation of the clumps of sludge is also very inconvenient. Utility Model Content

[0003] The purpose of this invention is to provide a multi-stage decentralized sludge low-carbon drying device. The multi-stage dispersion mechanism is interlocked and progressively advances, ensuring that sludge clumps of different sizes and hardness are effectively broken into fine particles. The loose particle state greatly increases the specific surface area of ​​the sludge, making it easier for moisture to migrate to the surface and evaporate, which can solve the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage decentralized sludge low-carbon drying device, comprising a drying box and a return air box, wherein the drying box and the return air box are interconnected, a material hopper is provided at the top of the return air box, wherein the material discharge pipe at the bottom of the material hopper extends into the interior of the return air box, and a dividing blade is provided inside the material hopper, an exhaust air box is provided at one end of the return air box, a wind direction damper that can be rotated in both directions is provided at one end of the exhaust air box, an air outlet is provided on the inner side of the exhaust air box, a bracket is provided at one end of the drying box, a motor assembly is provided inside the bracket, and a belt drive box is provided between the bracket and the drying box.

[0005] Through the above scheme, the bidirectional flip-out airflow damper enables the system to flexibly switch between positive pressure dehumidification and negative pressure / exhaust gas recirculation modes. When the humidity decreases or a uniform heat field is required, the amount of fresh air heating is reduced, and some low-humidity exhaust gas is recycled, which significantly reduces the energy consumption of the fan and the heat energy consumption.

[0006] Preferably, the drying box is equipped with a lifting track inside, and a material dropping track is provided below the lifting track. The bottom end of the lifting track extends to the bottom of the material dropping pipe, and a baffle is provided on one side of the material dropping pipe. The material dropping track is located below the top end of the lifting track.

[0007] Preferably, the belt drive box is connected to the lifting track and the discharge track respectively via drive rollers, and a vibrating screen frame is provided at the bottom of the drying box. The vibrating screen frame is configured as an inclined structure, and a mud discharge window is provided on one side of the bottom of the vibrating screen frame.

[0008] Preferably, the vibrating screen frame is equipped with multiple vibrating motors inside, and the two ends of the vibrating motors are equipped with spring structures. One end of the material dropping track extends to the top of the vibrating screen frame.

[0009] Preferably, the top of the drying box is provided with two fan windows, and the fan components inside the fan windows extend into the interior of the drying box.

[0010] Preferably, an electric heating baking rack is provided between the fan components, and the electric heating baking rack is located above the lifting track.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model features a multi-stage dispersion mechanism that is interconnected and progressively advances, ensuring that sludge clumps of different sizes and hardness are effectively broken into fine particles. The loose particle state greatly increases the specific surface area of ​​the sludge, making it easier for moisture to migrate to the surface and evaporate. The thin-layer fabric and vibratory fluidization ensure that the hot air can fully and evenly contact the sludge particles, avoiding the internal bridging phenomenon caused by agglomeration, significantly shortening the drying time, and improving the uniformity of the moisture content of the final product.

[0013] 2. In this utility model, the bidirectional flip-up airflow damper enables the system to flexibly switch between positive pressure dehumidification and negative pressure / exhaust gas circulation modes. When the humidity decreases or a uniform heat field is required, the amount of fresh air heating is reduced, and some low-humidity exhaust gas is recycled, which significantly reduces the energy consumption of the fan and the heat energy consumption. Attached Figure Description

[0014] Figure 1 This is the overall front view of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0017] In the diagram: 1. Drying box; 2. Return air box; 3. Bulk hopper; 4. Exhaust air box; 5. Bracket; 101. Lifting track; 102. Discharge track; 103. Sludge discharge window; 104. Vibrating screen frame; 105. Fan window plate; 106. Electric heating baking rack; 1011. Baffle plate; 1041. Vibrating motor; 1051. Fan assembly; 301. Dividing blade; 302. Discharge pipe; 401. Air direction gate; 402. Air outlet; 501. Belt drive box; 502. Motor assembly. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To address the problem that existing sludge treatment methods often result in sludge clumping under pressure after high-pressure dewatering, which hinders complete moisture evaporation during subsequent drying and makes transporting clumped sludge extremely inconvenient; please refer to... Figure 1-3 The present invention provides the following solution:

[0020] refer to Figure 1-3 A multi-stage decentralized sludge low-carbon drying device includes a drying box 1 and a return air box 2, which are interconnected. A material hopper 3 is provided on the top of the return air box 2. The material drop pipe 302 at the bottom of the material hopper 3 extends into the interior of the return air box 2, and a dividing blade 301 is provided inside the material hopper 3. An exhaust air box 4 is provided at one end of the return air box 2. A wind direction gate 401 that can be rotated in both directions is provided at one end of the exhaust air box 4. An air outlet 402 is provided on the inner side of the exhaust air box 4. A bracket 5 is provided at one end of the drying box 1. A motor assembly 502 is provided inside the bracket 5, and a belt drive box 501 is provided between the bracket 5 and the drying box 1.

[0021] In this embodiment, the lumpy sludge after high-pressure dewatering first enters the bulk hopper. The built-in rotary cutting blade 301 actively cuts and initially crushes the falling lumps of sludge, breaking its internal binding structure. The cut sludge then enters the return air box 2 through the discharge pipe 302. The baffle 1011 installed on one side of the discharge pipe effectively prevents sludge from accumulating at the starting end of the lifting track 101, ensuring that the material is evenly and thinly laid on the track, creating favorable conditions for subsequent drying.

[0022] refer to Figure 2-3The drying box 1 is equipped with a lifting track 101 inside, and a discharge track 102 is installed below the lifting track 101. One end of the lifting track 101 extends below the discharge pipe 302, and a baffle 1011 is installed on one side of the discharge pipe 302. The discharge track 102 is located below the top end of the lifting track 101. A belt drive box 501 is connected to both the lifting track 101 and the discharge track 102 via drive rollers. A vibrating screen frame 104 is installed at the bottom of the drying box 1. The vibrating screen frame 104 is an inclined structure. A mud discharge window 103 is provided on one side of the bottom of the frame 104. Multiple vibrating motors 1041 are provided inside the vibrating screen frame 104. Spring structures are provided at both ends of the vibrating motors 1041. One end of the material dropping track 102 extends to the top of the vibrating screen frame 104. Two fan windows 105 are provided on the top of the drying box 1. The fan assembly 1051 inside the fan window 105 extends into the interior of the drying box 1. An electric heating baking rack 106 is provided between the fan assemblies 1051. The electric heating baking rack 106 is located above the lifting track 101.

[0023] In this embodiment, the initially dispersed sludge is received and slowly conveyed upwards. During this process, the thin layer of sludge is constantly and slightly agitated, further weakening the internal binding force. The material drop conveyor 102 and high drop transfer: when the sludge is lifted to the top, it falls freely onto the material drop conveyor 102 at the lower position. This key step utilizes gravitational potential energy to convert into kinetic energy. During the fall, the sludge undergoes significant impact and slamming, causing the small and medium clumps that are not yet completely broken to further disintegrate into finer particles.

[0024] The inclined vibrating screen receives sludge from the end of the feed conveyor belt. Multiple internal vibrating motors 1041 generate high-frequency, low-amplitude vibrations via a spring structure, achieving both crushing and screening effects: the vibration not only continuously breaks up residual small clumps but also causes sludge particles to jump and move on the screen surface, achieving a fluidization-like effect and ensuring a highly loose material. Simultaneously, the vibration helps to stratify particles of different sizes, allowing smaller particles to pass through the screen surface more quickly, while larger particles are further crushed by the vibration and move towards the sludge discharge window 103.

[0025] The electric heating baking rack 106 is located above the lifting track 101. The heat radiation generated by it combines with the hot air driven by the fan assembly 1051 inside the fan window 105 from top to bottom. The hot air penetrates the thin layer of sludge loosely laid on the lifting track, taking away a large amount of moisture. The hot and humid exhaust gas enters the return air box 2 that is connected to it. The bulk hopper 3 at the top of the return air box and the newly fallen low-temperature wet sludge form a natural cooling / pre-dehumidification zone, partially recovering the waste heat of the exhaust gas and performing preliminary preheating / dehumidification of the new material. The bidirectional reversing wind direction damper 401 of the exhaust air box 4 is key and can also adjust the airflow direction according to the operating status.

[0026] Positive pressure mode (gate deflected towards air outlet 402): Forces the discharge of high-humidity exhaust gas;

[0027] Negative pressure / recirculation mode (gate closed or air outlet partially closed): negative pressure is formed in the return air box, which promotes a more uniform distribution of hot airflow in the drying box, or guides some low-humidity exhaust gas to flow back and mix with fresh hot air for reuse, significantly reducing energy consumption.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage decentralized sludge low-carbon drying device, characterized in that, The device includes a drying box (1) and a return air box (2), which are interconnected. A bulk material hopper (3) is provided on the top of the return air box (2), wherein the material drop pipe (302) at the bottom of the bulk material hopper (3) extends into the interior of the return air box (2), and a dividing blade (301) is provided inside the bulk material hopper (3). An exhaust air box (4) is provided at one end of the return air box (2), and a wind direction gate (401) that can be rotated in both directions is provided at one end of the exhaust air box (4). An air outlet (402) is provided on the inner side of the exhaust air box (4). A bracket (5) is provided at one end of the drying box (1), and a motor assembly (502) is provided inside the bracket (5). A belt drive box (501) is provided between the bracket (5) and the drying box (1).

2. The multi-stage decentralized sludge low-carbon drying device according to claim 1, characterized in that: The drying box (1) is equipped with a lifting track (101) inside, and a material dropping track (102) is provided below the lifting track (101). The bottom end of the lifting track (101) extends to the bottom of the material dropping pipe (302), and a baffle (1011) is provided on one side of the material dropping pipe (302). The material dropping track (102) is located below the top end of the lifting track (101).

3. The multi-stage decentralized sludge low-carbon drying device according to claim 2, characterized in that: The belt drive box (501) is connected to the lifting track (101) and the discharge track (102) respectively via drive rollers. The bottom of the drying box (1) is provided with a vibrating screen frame (104), which is set as an inclined structure. A mud discharge window (103) is provided on one side of the bottom of the vibrating screen frame (104).

4. The multi-stage decentralized sludge low-carbon drying device according to claim 3, characterized in that: The vibrating screen frame (104) is equipped with multiple vibrating motors (1041) inside, and spring structures are provided at both ends of the vibrating motors (1041). One end of the material dropping track (102) extends to the top of the vibrating screen frame (104).

5. The multi-stage decentralized sludge low-carbon drying device according to claim 2, characterized in that: The top of the drying box (1) is provided with two fan windows (105), and the fan assembly (1051) inside the fan windows (105) extends into the interior of the drying box (1).

6. The multi-stage decentralized sludge low-carbon drying device according to claim 5, characterized in that: An electric heating baking rack (106) is provided between the fan assembly (1051), and the electric heating baking rack (106) is located above the lifting track (101).

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