Multi-stage layered sludge ventilation drying box

Abstract

The utility model discloses a multistage layered sludge ventilation drying box, which comprises a drying box, a box door, two first sludge boxes, a second sludge box and a control box, the upper end of the drying box is provided with two air outlet cylinders, the air outlet cylinders are communicated with air outlet pipes, one ends, far away from the drying box, of the air outlet pipes are communicated with a fan, and the fan is communicated with the drying box. A drying pool is fixedly connected to the bottom in the drying box, and a first heat source and a second heat source are arranged on the side wall of the drying box. The air guide mechanism is arranged, hot air can penetrate through all layers of sludge from the vertical direction through the bottom drying pool and the air outlet round pipe, simultaneous vertical heat supply is achieved, the problem of heat lag of upper-layer sludge in a traditional single-box structure is solved, and the drying time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of sludge ventilation and drying technology, and in particular to a multi-level stratified sludge ventilation and drying box. Background Technology

[0002] Sludge drying is a process of removing moisture from sludge through physical, chemical, or thermal means. It aims to reduce, stabilize, and utilize sludge. Its core objective is to reduce the water content of sludge and decrease its volume for transportation, landfill, or further utilization (such as as fuel or building material). Sludge drying boxes are equipment specifically designed for sludge drying. By controlling temperature, wind speed, and airflow path, they achieve efficient evaporation of moisture from sludge.

[0003] Traditional sludge ventilation and drying boxes typically employ a single-box structure. The sludge box is large in volume and has a high internal sludge thickness, resulting in hot air being input only from a single air inlet at the bottom. Due to the high sludge density and limited hot air flow path, the upper and middle layers of sludge cannot fully contact the hot air, causing significant heat transfer lag in the drying process. At the same time, the single-box structure has a fixed processing capacity per batch, making it impossible to optimize hot air utilization through stratified processing. This results in a long overall drying cycle and high energy consumption, making it difficult to meet the high-efficiency requirements of large-scale sludge treatment. To address these issues, we propose this multi-stage stratified sludge ventilation and drying box. Utility Model Content

[0004] The main objective of this invention is to provide a multi-stage, layered sludge ventilation and drying box, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage stratified sludge ventilation and drying box includes a drying box, a door, two first sludge boxes, a second sludge box, and a control box. The drying box has two air outlets at its upper end, each connected to an air outlet pipe. A fan is connected to the end of each air outlet pipe furthest from the drying box. A drying tank is fixedly connected to the bottom of the drying box. A first heat source and a second heat source are located on the side wall of the drying box. A gas guiding mechanism for introducing hot air is provided on the side wall of the drying box. The gas guiding mechanism includes two square air outlet pipes fixedly connected to the side wall of the drying box. Multiple round air outlet pipes are connected to the side wall of the square air outlet pipes, and multiple air outlet holes are opened at the upper end of each round air outlet pipe. Multiple support blocks are fixedly connected to the lower end of the first sludge box. A heat recovery mechanism for recovering heat from the hot air is provided on the drying box.

[0007] Preferably, the recycling mechanism includes two water storage tanks fixedly connected to the drying box, and a vent box is fixedly connected inside the water storage tank, with vent pipes at both ends of the vent box.

[0008] Preferably, the inner wall of the ventilation box is fixedly connected with multiple partitions, and the multiple partitions are arranged at equal intervals.

[0009] Preferably, an installation ring is fixedly connected to the inner wall of the air outlet, and a dust removal filter cartridge is provided inside the installation ring.

[0010] Preferably, the two inner walls of the drying oven are fixedly connected with limit plates, and the limit plates have an L-shaped cross-section.

[0011] Preferably, multiple air outlet pipes at the same height are arranged at equal intervals, and multiple air outlet holes on the air outlet pipes are arranged at equal intervals.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This device is equipped with an air guiding mechanism, which allows hot air to penetrate each layer of sludge from the top and bottom through the bottom drying tank and the air outlet pipe, achieving "simultaneous heating from top to bottom". This avoids the problem of "thermal lag" in the upper layer of sludge in the traditional single-box structure and significantly shortens the drying time.

[0014] 2. This device is equipped with a water storage tank, etc. The hot and humid air discharged during the drying process is introduced into the air storage box through the ventilation box and partition in the water storage tank. The partition extends the residence time of the hot air and heats the water in the water storage tank, realizing the reuse of waste heat and reducing energy consumption.

[0015] 3. This device is equipped with an L-shaped limiting plate, which precisely constrains the position of the sludge box to prevent the box from shifting when the forklift is placed, thus avoiding obstruction of hot air flow and further ensuring effective contact between hot air and sludge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a multi-stage layered sludge ventilation and drying box proposed in this utility model;

[0017] Figure 2 This is a side view of a multi-stage stratified sludge ventilation and drying box proposed in this utility model;

[0018] Figure 3 for Figure 1 A sectional view;

[0019] Figure 4 for Figure 3 Side view;

[0020] Figure 5 This is another side view of a multi-stage stratified sludge ventilation and drying box proposed in this utility model.

[0021] In the diagram: 1. Drying box, 2. Air outlet, 3. Air outlet pipe, 4. Fan, 5. Water storage tank, 6. First sludge tank, 7. Second sludge tank, 8. Drying pool, 9. First heat source, 10. Control box, 11. Second heat source, 12. Support block, 13. Air outlet round pipe, 14. Air outlet square pipe, 15. Ventilation box, 16. Partition plate, 17. Limiting plate, 18. Dust removal filter cartridge. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figure 1-5 As shown, a multi-stage stratified sludge ventilation and drying box comprises a drying box 1, a box door, two first sludge boxes 6, a second sludge box 7, and a control box 10. The box door is hinged to the drying box 1, and its seals and locks are not shown in the figure. The drying box 1 and the box door are both supported by conventional plates in the drying box field. The upper end of the drying box 1 is provided with two air outlets 2, and an air outlet pipe 3 is connected to the air outlet 2. The end of the air outlet pipe 3 away from the drying box 1 is connected to a fan 4. A drying tank 8 is fixedly connected to the bottom of the drying box 1. The side wall of the drying box 1 is provided with a first heat source 9 and a second heat source 11, which can be a hot air blower, a hot air unit, etc. An air inlet is opened on the side wall of the drying tank 8, which is shown in the figure. The structure of the first sludge box 6 and the second sludge box 7 is the same as that of the sludge box in the prior art, only smaller in height, and a ventilation hole is opened at the bottom of its interior.

[0024] The drying chamber 1 has a gas guiding mechanism on its side wall for introducing hot air. The gas guiding mechanism includes two square air outlet pipes 14 fixedly connected to the side wall of the drying chamber 1. The two square air outlet pipes 14 are connected to the second heat source 11 through a three-way pipe. The three-way pipe is equipped with two valves (to control the flow rate of hot air). Multiple round air outlet pipes 13 are connected to the side wall of the square air outlet pipes 14. Multiple air outlet holes are opened at the upper end of the round air outlet pipes 13. Multiple support blocks 12 are fixedly connected to the lower end of the first sludge tank 6.

[0025] The drying oven 1 is equipped with a heat recovery mechanism for recovering heat from the air. The heat recovery mechanism includes two water storage tanks 5 fixedly connected to the drying oven 1. A vent box 15 is fixedly connected inside the water storage tank 5. Vent pipes are provided at both ends of the vent box 15. The water storage tank 5 is equipped with an inlet pipe and an outlet pipe (not shown in the figure, but with valves) that communicate with its interior. The water storage tank 5 is equipped with a temperature controller and a liquid level sensor.

[0026] In this invention, multiple partitions 16 are fixedly connected to the inner wall of the ventilation box 15. The multiple partitions 16 are arranged at equal intervals, which can extend the hot air retention time and improve the heat recovery efficiency.

[0027] In this utility model, an installation ring is fixedly connected to the inner wall of the air outlet 2. A dust removal filter cartridge 18 is provided inside the installation ring. The dust removal filter cartridge 18 can remove dust from the discharged hot air to prevent dust from polluting the environment. The dust removal filter cartridge 18 can be connected to the installation ring by means of snap-fit, bolts and nuts, etc.

[0028] In this utility model, limiting plates 17 are fixedly connected to both inner walls of the drying box 1. The limiting plates 17 have an L-shaped cross section. The two limiting plates 17 position the first sludge box 6 and the second sludge box 7 for placement, so as to prevent the first sludge box 6 and the second sludge box 7 from being over-placed by the forklift.

[0029] In this invention, multiple air outlet pipes 13 at the same height are arranged at equal intervals, and multiple air outlet holes on the air outlet pipes 13 are arranged at equal intervals. The air outlet pipes 13 at the same height and the air outlet holes on the pipes are all designed with equal intervals to ensure that hot air evenly covers the bottom of each layer of sludge box in the horizontal and vertical directions inside the box, avoiding the defects of "insufficient air volume in the center" or "overheating at the edge" at the bottom of the traditional single box, and improving the drying uniformity.

[0030] In the initial state, the first sludge tank 6 and the second sludge tank 7 are placed on the ground respectively.

[0031] It should be noted that this utility model is a multi-stage stratified sludge ventilation and drying box. After the user loads the sludge into two first sludge boxes 6 and a second sludge box 7, the user uses a forklift to stack the two first sludge boxes 6 and the second sludge box 7 on the ground as shown in the figure. Then, the user uses a forklift to push the two first sludge boxes 6 and the second sludge box 7 into the drying box 1. The second sludge box 7 is placed in the drying tank 8. The first heat source 9 and the second heat source 11 are activated. The hot air from the first heat source 9 enters the drying box 1 through the air inlet of the drying tank 8. The hot air moves upward in the drying tank 8 to dry the sludge in the second sludge box 7. The hot air from the second heat source 11 enters multiple air outlet round pipes 13 through two air outlet square pipes 14. The hot air sprayed from the multiple air outlet round pipes 13 below the two first sludge boxes 6 is dispersed below them. During the upward process, the sludge in the two first sludge boxes 6 is dried. In this process, the sludge can be dried in multiple stages, which greatly improves the sludge drying speed.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage stratified sludge ventilation and drying box, comprising a drying box (1), a box door, two first sludge boxes (6), a second sludge box (7), and a control box (10), characterized in that, The drying box (1) is provided with two air outlets (2) at the top. The air outlets (2) are connected to an air outlet pipe (3). The end of the air outlet pipe (3) away from the drying box (1) is connected to a fan (4). The bottom of the drying box (1) is fixedly connected to a drying pool (8). The side wall of the drying box (1) is provided with a first heat source (9) and a second heat source (11). The side wall of the drying box (1) is provided with a gas guiding mechanism for introducing hot air. The gas guiding mechanism includes two air outlet square pipes (14) fixedly connected to the side wall of the drying box (1). The side wall of the air outlet square pipes (14) is connected to multiple air outlet round pipes (13). The upper end of the air outlet round pipes (13) is provided with multiple air outlet holes. The lower end of the first sludge box (6) is fixedly connected to multiple support blocks (12). The drying box (1) is provided with a recovery mechanism for recovering the heat of the hot air.

2. The multi-stage stratified sludge ventilation and drying box according to claim 1, characterized in that, The recycling mechanism includes two water storage tanks (5) fixedly connected to the drying box (1). A ventilation box (15) is fixedly connected inside the water storage tank (5), and ventilation pipes are provided at both ends of the ventilation box (15).

3. A multi-stage stratified sludge ventilation and drying box according to claim 2, characterized in that, The inner wall of the ventilation box (15) is fixedly connected with multiple partitions (16), and the multiple partitions (16) are arranged at equal intervals.

4. The multi-stage stratified sludge ventilation and drying box according to claim 1, characterized in that, An installation ring is fixedly connected to the inner wall of the air outlet (2), and a dust removal filter cartridge (18) is provided inside the installation ring.

5. A multi-stage stratified sludge ventilation and drying box according to claim 1, characterized in that, The drying oven (1) has two inner walls that are fixedly connected with limiting plates (17), and the limiting plates (17) have an L-shaped cross section.

6. A multi-stage stratified sludge ventilation and drying box according to claim 1, characterized in that, Multiple air outlet pipes (13) at the same height are arranged at equal intervals, and multiple air outlet holes on the air outlet pipes (13) are arranged at equal intervals.

Images