Sludge drying treatment device and sludge drying treatment method

Abstract

The present invention relates to a sludge drying treatment device and a sludge drying treatment method, which aim to provide an environmentally-friendly and cost-effective sludge management scheme for township wastewater treatment plants. The device comprises a sealed housing, wherein a sludge conveyor belt capable of transversely stretching and retracting is provided in the sealed housing, facilitating the efficient conveying of materials. A sludge intake hopper is provided at one end of the housing to ensure that sludge smoothly enters a treatment process, a dried-sludge collection container is connected to the other end of the housing, and the container is internally provided in a dried-sludge collection box. A specially designed inclined plate guides the smooth transition of dried sludge from a tail end of the conveyor belt to the collection box, thereby ensuring no leakage during the process. The top of the device is covered with a solar panel, and foldable sections are provided, thereby making use of solar energy to the maximum extent, and improving the drying efficiency. Housing folding sections at the bottom further optimize the space adaptability of an apparatus. The whole design is simple, operation is easy, the maintenance cost is remarkably reduced, the moisture content of the sludge is greatly reduced, and the subsequent treatment and transportation costs are reduced.

Description

Sludge drying treatment device and sludge drying treatment method Technical Field

[0001] The present invention belongs to the technical field of municipal dredging, and in particular relates to a sludge drying treatment device and a sludge drying treatment method. Background Art

[0002] In recent years, with the rapid development of my country's wastewater treatment industry, sludge production has increased dramatically, creating a significant contradiction between sludge treatment capacity and output. This contradiction is particularly evident in township sewage treatment plants, which are relatively small, typically with a treatment capacity of less than 500 cubic meters per day. In these economically and technologically backward areas, traditional sludge treatment facilities such as screw presses, centrifugal dewatering machines, and plate and frame filter presses, while capable of treating sludge to a certain extent, struggle to consistently maintain a final sludge moisture content below 80% due to limitations in operator skill and equipment processing capacity. High sludge moisture content not only increases subsequent treatment and disposal costs but can also cause environmental pollution.

[0003] To address this challenge, relevant regulatory authorities have continuously tightened regulations on sludge moisture content, prompting the wastewater treatment industry to seek more efficient and cost-effective sludge treatment technologies. Township-level wastewater treatment plants, in particular, are in urgent need of a cost-effective deep drying solution that can adapt to local conditions and effectively reduce sludge moisture content. Traditional sludge drying methods often rely on mechanical dehydration or thermal drying, but these methods are either energy-intensive or require high-quality equipment, making them difficult to implement in resource-limited rural areas.

[0004] Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a sludge drying treatment device and a sludge drying treatment method, aiming to provide a sludge drying device that can make full use of solar energy, which has the characteristics of simple structure, easy operation and low maintenance cost. At the same time, it can effectively reduce the moisture content of the sludge and reduce the cost of subsequent treatment and transportation, thereby providing a more environmentally friendly and economical sludge treatment solution for township sewage treatment plants.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a sludge drying treatment device, comprising a device housing, a sludge conveyor belt is provided in the device housing, a mud feed hopper is provided on one end of the device housing, the output port of the mud feed hopper is located above the input end of the sludge conveyor belt, a dry mud collection box is provided on the outer wall of the other end of the device housing, a dry mud collection box is provided in the dry mud collection box, an opening is provided between the device housing and the dry mud collection box to connect the two, an inclined plate is provided in the opening, the higher end of the inclined plate is located below the output end of the sludge conveyor belt, and the lower end is located above the dry mud collection box;

[0007] The top of the device shell is provided with a sun panel, and both sides of the sun panel are provided with sun panel folding sections through hinge shafts, and both sides of the bottom plate of the device shell are provided with shell folding sections through hinge shafts;

[0008] The sludge conveyor belt can be expanded and folded in the transverse direction.

[0009] In a preferred solution, a sludge agitator is provided in the sludge inlet hopper, and the sludge agitator is used to stir and break up lumps in the input sludge.

[0010] In the preferred solution, a mud spreading plate is provided on the top surface of the device shell, and the mud spreading plate is arranged close to the mud inlet hopper. The distance between the bottom surface of the mud spreading plate and the upper belt surface of the sludge conveyor belt is less than 2 cm. The mud spreading plate is used to spread and disperse the input sludge.

[0011] In a preferred solution, the mud spreading plate is a "V"-shaped plate, and the superior angle of the mud spreading plate is set toward the mud inlet hopper.

[0012] In a preferred solution, the dry mud collection box is installed in the dry mud collection box using a drawer-type structure.

[0013] In a preferred embodiment, the inclined plate is movably fixed in the opening by a pin, and the higher end of the inclined plate extends to contact the lower belt surface of the sludge conveyor belt;

[0014] A column is provided on the bottom surface of the device shell, a spring is sleeved on the column, a strip groove is provided on the bottom surface of the inclined plate, a sliding block is provided in the strip groove, and the upper end of the spring is fixedly connected to the slider.

[0015] In a preferred embodiment, the solar panel is provided with an exhaust pipe, a plurality of vertical condensing pipes are provided on the bottom surface of the solar panel, a condensed water collecting branch pipe is provided directly below the condensing pipe, and the plurality of condensed water collecting branch pipes are provided on the same condensed water discharge pipe, one end of which passes through the end wall of the device housing;

[0016] A support rod for fixing and supporting the condensate discharge pipe is provided on the obtuse-angle side of the mud spreading plate.

[0017] In a preferred embodiment, the sludge conveyor belt is driven by a conveyor belt drum. The sludge conveyor belt includes two conveyor belt drums on the same end. The two conveyor belt drums are connected by a connecting rod. The connecting rods are hinged. A bearing is provided on the outer end of the conveyor belt drum. The conveyor belt drum and the bearing are fixedly connected. A conveyor belt support frame is hinged on the outer ring of the bearing.

[0018] Slide grooves are provided on both sides of the bottom plate of the device shell and on the side of the shell folding section close to the device shell. The lower end of the conveyor belt support frame is arranged in the slide groove on the bottom plate of the device shell and can be moved laterally along the slide groove to the shell folding section.

[0019] In a preferred solution, one of the conveyor belt drums is driven by a drive motor, and a drive shaft of the drive motor is arranged through a bearing.

[0020] The sludge drying treatment method based on the above-mentioned sludge drying treatment device includes the following steps:

[0021] 1) The device enters the site and moves to the end of the sludge conveying line;

[0022] 2) Fold the two folding sections of the solar panel upwards and fold the two folding sections of the shell downwards to unfold the entire device;

[0023] 3) Move the conveyor belt support frame horizontally to unfold the sludge conveyor belt as a whole and ensure the tension of the sludge conveyor belt;

[0024] 4) Install a drive motor on one side of the conveyor belt drum at one end of the sludge conveyor belt;

[0025] 5) Start the sludge conveying line, input the sludge into the device through the sludge inlet hopper, and simultaneously start the drive motor to make the sludge conveyor belt run;

[0026] 6) The sludge entering the device is agglomerated and broken by the sludge agitator and then falls onto the sludge conveyor belt;

[0027] 7) The crushed sludge is transported by the sludge conveyor belt and spread and dispersed by the sludge spreading plate;

[0028] 8) The sludge conveyor belt transports the sludge and dries it. The water in the sludge evaporates and the sludge formed after drying falls from the inclined plate into the dry sludge collection box;

[0029] 9) Part of the water vapor formed by evaporation is discharged through the exhaust pipe, and part of it is condensed by the condenser to form condensed water, which is then discharged through the condensed water discharge pipe.

[0030] The sludge drying treatment device and sludge drying treatment method provided by the present invention have the following beneficial effects by adopting the above-mentioned structure and method:

[0031] (1) By combining a sun shed with multiple functional modules, this device can effectively utilize solar energy, significantly improve the efficiency and quality of sludge drying, and significantly reduce subsequent processing and transportation costs;

[0032] (2) The device is designed with a retractable structure that can be retracted when not in use, reducing the space occupied and facilitating storage and transportation. When working, the device can be quickly unfolded to meet the needs of a larger treatment area and is suitable for sewage treatment sites of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and examples:

[0034] FIG1 is a schematic diagram of the internal structure of the present invention.

[0035] FIG2 is a schematic diagram of the end structure of the present invention in a folded state.

[0036] FIG3 is a schematic diagram of the end structure of the present invention in the unfolded state.

[0037] In the figure: device shell 1, first roller 101, sun panel 2, mud inlet hopper 3, sludge agitator 4, mud spreading plate 5, sludge conveyor belt 6, conveyor belt drum 601, connecting rod 602, dry mud collection box 7, second roller 701, dry mud collection box 8, opening 9, inclined plate 10, strip groove 1001, slider 1002, column 11, spring 12, condensate discharge pipe 13, support rod 131, condensate collection branch pipe 14, condensate pipe 15, exhaust pipe 16, sun panel folding section 17, shell folding section 18, conveyor belt support frame 19, bearing 20, slide 21, drive motor 22. DETAILED DESCRIPTION

[0038] Example 1:

[0039] A sludge drying treatment device includes a device housing 1, a sludge conveyor belt 6 is provided in the device housing 1, a sludge feed hopper 3 is provided on one end of the device housing 1, the output port of the sludge feed hopper 3 is located above the input end of the sludge conveyor belt 6, a dry mud collection box 7 is provided on the outer wall of the other end of the device housing 1, a dry mud collection box 8 is provided in the dry mud collection box 7, an opening 9 is provided between the device housing 1 and the dry mud collection box 7 to connect the two, an inclined plate 10 is provided in the opening 9, the higher end of the inclined plate 10 is located below the output end of the sludge conveyor belt 6, and the lower end is located above the dry mud collection box 8;

[0040] The top of the device housing 1 is provided with a sun panel 2, and both sides of the sun panel 2 are provided with sun panel folding sections 17 through hinge shafts, and both sides of the bottom plate of the device housing 1 are provided with housing folding sections 18 through hinge shafts;

[0041] The sludge conveyor belt 6 can be expanded or folded in the transverse direction.

[0042] In the above scheme, the lateral contraction and expansion of the sludge conveyor belt 6 is mainly achieved by the lateral movement of the conveyor belt support frame 19 on both sides of the sludge conveyor belt 6. By controlling the lateral movement of the sludge conveyor belt 6 on both sides of the sludge conveyor belt 6, the sludge conveyor belt 6 is transformed from the "V" shape shown in Figure 2 to the horizontal expansion state shown in Figure 3, realizing the function of "expanding and contracting in the lateral direction".

[0043] When the sludge conveyor belt 6 needs to be retracted, taking the state shown in Figure 3 as an example, the conveyor belt support frames 19 on both sides of the sludge conveyor belt 6 are gathered toward the middle, and the connecting rod 602 is bent to finally realize the transition of the sludge conveyor belt 6 from the "expanded" to the "retracted" state.

[0044] In a preferred solution, a sludge agitator 4 is provided in the sludge inlet hopper 3, and the sludge agitator 4 is used to stir and break up lumps in the input sludge.

[0045] In the preferred solution, a mud spreading plate 5 is provided on the inner top surface of the device shell 1. The mud spreading plate 5 is arranged close to the mud inlet hopper 3. The distance between the bottom surface of the mud spreading plate 5 and the upper belt surface of the sludge conveyor belt 6 is less than 2 cm. The mud spreading plate 5 is used to spread and disperse the input sludge.

[0046] In a preferred solution, the mud spreading plate 5 is a “V”-shaped plate, and the superior angle of the mud spreading plate 5 is set toward the mud inlet hopper 3.

[0047] In a preferred solution, the dry mud collection box 8 is installed in the dry mud collection box 7 using a drawer-type structure.

[0048] In a preferred embodiment, the inclined plate 10 is movably fixed in the opening 9 by a pin, and the higher end of the inclined plate 10 extends to contact the lower belt surface of the sludge conveyor belt 6;

[0049] A column 11 is provided on the bottom surface of the device housing 1, and a spring 12 is sleeved on the column 11. A strip groove 1001 is provided on the bottom surface of the inclined plate 10, and a sliding slider 1002 is provided in the strip groove 1001. The upper end of the spring 12 is fixedly connected to the slider 1002.

[0050] In a preferred embodiment, a steam exhaust pipe 16 is provided on the sun panel 2, and a plurality of vertical condensation pipes 15 are provided on the bottom surface of the sun panel 2. A condensation water collecting branch pipe 14 is provided directly below the condensation pipe 15. The plurality of condensation water collecting branch pipes 14 are provided on the same condensation water discharge pipe 13, and one end of the condensation water discharge pipe 13 is provided through the end wall of the device housing 1.

[0051] A support rod 131 for fixing and supporting the condensate discharge pipe 13 is provided on the obtuse-angled side of the mud spreading plate 5 .

[0052] In a preferred embodiment, the sludge conveyor belt 6 is driven by a conveyor belt drum 601. The same end of the sludge conveyor belt 6 includes two conveyor belt drums 601. The two conveyor belt drums 601 are connected by a connecting rod 602. The connecting rods 602 are hinged. A bearing 20 is provided on the outer end of the conveyor belt drum 601. The conveyor belt drum 601 and the bearing 20 are fixedly connected. A conveyor belt support frame 19 is hingedly provided on the outer ring of the bearing 20.

[0053] Slide grooves 21 are provided on both sides of the bottom plate of the device shell 1 and on the side of the shell folding section 18 close to the device shell 1. The lower end of the conveyor belt support frame 19 is set in the slide groove 21 on the bottom plate of the device shell 1 and can be moved laterally along the slide groove 21 to the shell folding section 18.

[0054] In a preferred solution, one of the conveyor belt drums 601 is driven by a drive motor 22 , and a drive shaft of the drive motor 22 is disposed through a bearing 20 .

[0055] Example 2:

[0056] The sludge drying treatment method based on the sludge drying treatment device described in Example 1 includes the following steps:

[0057] 1) The device enters the site and moves to the end of the sludge conveying line;

[0058] 2) Fold the two folding sections 17 of the solar panel upwards and the two folding sections 18 of the shell downwards to unfold the entire device;

[0059] 3) Laterally moving the conveyor belt support frame 19 to unfold the sludge conveyor belt 6 as a whole and ensure that the sludge conveyor belt 6 is tensioned;

[0060] 4) Installing a drive motor 22 on one side of the conveyor belt drum 601 at one end of the sludge conveyor belt 6;

[0061] 5) Start the sludge conveying line, input the sludge into the device through the sludge inlet hopper 3, and simultaneously start the drive motor 22 to make the sludge conveyor belt 6 run;

[0062] 6) The sludge entering the device is agglomerated and broken by the sludge agitator 4 and then falls onto the sludge conveyor belt 6;

[0063] 7) The crushed sludge is transported by the sludge conveyor belt 6 and spread and dispersed by the sludge spreading plate 5;

[0064] 8) The sludge conveyor belt 6 transports the sludge and dries it. The water in the sludge evaporates and the sludge formed after drying falls from the inclined plate 10 into the dry sludge collection box 7;

[0065] 9) Part of the evaporated water vapor is discharged through the exhaust pipe 16, and part of it is condensed into condensed water through the condenser pipe 15 and then discharged through the condensed water discharge pipe 13.

[0066] Example 3:

[0067] Take actual operation as an example:

[0068] (1) Device assembly and deployment:

[0069] In a typical township sewage treatment plant, assuming a daily sewage treatment capacity of 250 cubic meters, 0.2 cubic meters of sludge with a moisture content of 80% needs to be processed. This portion of sludge can be processed by deploying the sludge drying treatment device of the present invention.

[0070] Initial state: The device is in a collapsed state, measuring 3.5 meters by 1 meter, making it easy to transport and store.

[0071] (2) Preparation stage:

[0072] Move the device to a designated location and place it steadily using the first roller 101 and the second roller 701 .

[0073] The housing folding section 18 of the bottom plate of the device housing 1 is folded downward, and then the solar panel folding section 17 of the solar panel 2 is folded upward, so as to stretch the device.

[0074] Pull the conveyor belt support frame 19 at the end of the sludge conveyor belt 6 to unfold the sludge conveyor belt 6 to the state shown in Figure 3. At this time, the device size becomes 3.5 meters × 3 meters, and the preparation work for the stretched state is completed.

[0075] (3) Pre-operation inspection:

[0076] Verify that all parts are installed correctly.

[0077] Check whether the condensate discharge pipe 13 and the condensate collecting branch pipe 14 are unobstructed, and confirm that the exhaust pipe 16 is not blocked.

[0078] Verify that the sludge conveyor belt 6 is straight and not excessively loose or tight.

[0079] Operation process

[0080] (1) Feeding: The high-water content sludge to be treated enters the sludge inlet hopper 3 and the device is started.

[0081] (2) Mixing and spreading: The sludge is stirred by the sludge agitator 4 during the falling process, broken into smaller clumps, and then evenly distributed on the sludge conveyor belt 6. The sludge spreading plate 5 ensures that the sludge layer has an appropriate thickness, which is conducive to water evaporation.

[0082] (3) Drying: In the sun shed, solar energy is used to accelerate the evaporation of water, while air circulation is maintained through the exhaust pipe 16 to increase the drying rate.

[0083] When the temperature is below 40°C, the conveyor belt speed is set to the first gear of 0.2 m / h.

[0084] The temperature is between 40 and 50°C and the speed is adjusted to the second gear of 0.3 m / h.

[0085] When the temperature exceeds 50°C, the speed is increased to the third gear of 0.4 m / h.

[0086] (4) Condensate management: The evaporated water is condensed at the condenser pipe 15 and safely discharged through the condensate discharge pipe 13 to avoid water accumulation affecting the drying efficiency.

[0087] (5) Unloading: The dried sludge is conveyed to the outlet 9 by the sludge conveyor belt 6, and is collected and discharged through the dry sludge collection box 8.

[0088] Outcome evaluation

[0089] Under the condition of sufficient sunshine in summer, this device can dry 0.2 cubic meters of sludge with a moisture content of 80% to 60%, which meets the expected goal.

[0090] The volume of treated sludge is reduced, making it easier to store and transport, and reducing subsequent processing costs.

[0091] The device has low energy consumption, requiring only a small amount of electricity to support the operation of sensors and conveyor belts. Most of the energy comes from solar energy, which is environmentally friendly and economical.

[0092] Shrink and store

[0093] After completing the processing task, the device is restored to the retracted state in the reverse order for easy storage or transfer to other locations.

[0094] Through the above embodiments, the sludge drying treatment device of the present invention performs well in the application of township sewage treatment plants, which not only improves the drying efficiency but also reduces the operating cost, demonstrating its feasibility and advantages in actual scenarios.

Claims

1. A sludge drying treatment device, comprising a device housing (1), characterized in that: Inside the device housing (1), there is a sludge conveyor belt (6). At one end of the device housing (1), there is a mud inlet hopper (3). The output port of the mud inlet hopper (3) is located above the input end of the sludge conveyor belt (6). On the outer wall at the other end of the device housing (1), there is a dry mud collection box (7). Inside the dry mud collection box (7), there is a dry mud collection box (8). There is an opening (9) connecting the device housing (1) and the dry mud collection box (7). In the opening (9), there is an inclined plate (10). The higher end of the inclined plate (10) is located below the output end of the sludge conveyor belt (6), and the lower end is located above the dry mud collection box (8). On the top of the device housing (1), there is a sunlight panel (2). On both sides of the sunlight panel (2), there are sunlight panel folding sections (17) respectively through hinge shafts. On both sides of the bottom plate of the device housing (1), there are housing folding sections (18) through hinge shafts. The sludge conveyor belt (6) can be unfolded and folded in the horizontal direction.

2. The sludge drying treatment device according to claim 1, wherein: In the mud inlet hopper (3), there is a sludge stirrer (4). The sludge stirrer (4) is used to stir and break the lumps in the input sludge.

3. A sludge drying treatment device according to claim 1, characterized in that: On the inner top surface of the device housing (1), there is a sludge spreading plate (5). The sludge spreading plate (5) is arranged close to the mud inlet hopper (3). The distance between the bottom surface of the sludge spreading plate (5) and the upper belt surface of the sludge conveyor belt (6) is less than 2 cm. The sludge spreading plate (5) is used to spread and disperse the input sludge.

4. A sludge drying treatment device according to claim 3, characterized in that: The sludge spreading plate (5) is a "V"-shaped plate, and the obtuse angle of the sludge spreading plate (5) faces the mud inlet hopper (3).

5. A sludge drying treatment device according to claim 1, characterized in that: The dry mud collection box (8) is installed inside the dry mud collection box (7) by a drawer-type structure.

6. The sludge drying treatment device according to claim 1, wherein: The inclined plate (10) is movably fixed in the opening (9) through a pin shaft. The higher end of the inclined plate (10) extends to contact the lower belt surface of the sludge conveyor belt (6). On the bottom surface of the device housing (1), there is a column (11). A spring (12) is sleeved on the column (11). On the bottom surface of the inclined plate (10), there is a strip groove (1001). In the strip groove (1001), there is a slidable slider (1002). The upper end of the spring (12) is fixedly connected to the slider (1002).

7. A sludge drying treatment device according to claim 1, characterized in that: On the sunlight panel (2), there is an exhaust pipe (16). On the bottom surface of the sunlight panel (2), there are multiple vertical condensation pipes (15). Right below the condensation pipes (15), there are condensation water collection branch pipes (14). Multiple condensation water collection branch pipes (14) are arranged on the same condensation water discharge pipe (13). One end of the condensation water discharge pipe (13) passes through the end wall of the device housing (1). On the obtuse angle side of the sludge spreading plate (5), there is a support rod (131) for fixedly supporting the condensation water discharge pipe (13).

8. A sludge drying treatment device according to claim 1, characterized in that: The sludge conveyor belt (6) is driven by a conveyor belt drum (601). There are two conveyor belt drums (601) at the same end of the sludge conveyor belt (6). The two conveyor belt drums (601) are connected by a connecting rod (602). The connecting rods (602) are hinged. A bearing (20) is provided at the outer end of the conveyor belt drum (601). The conveyor belt drum (601) is fixedly connected to the bearing (20). The outer ring of the bearing (20) is hinged with a conveyor belt support frame (19). Chute grooves (21) are provided on both sides of the bottom plate of the device housing (1) and on one side of the housing folding section (18) close to the device housing (1). The lower end of the conveyor belt support frame (19) is arranged in the chute groove (21) on the bottom plate of the device housing (1) and can move horizontally along the chute groove (21) to the housing folding section (18).

9. A sludge drying treatment device according to claim 8, characterized in that: One of the conveyor belt drums (601) is driven by a driving motor (22). The driving shaft of the driving motor (22) passes through the bearing (20).

10. A sludge drying treatment method for the sludge drying treatment device according to any one of claims 1-9, characterized in that It includes the following steps: 1) The device enters the site and the device is moved to the end of the sludge conveying line; 2) Turn up two sunlight panel folding sections (17) and turn down two housing folding sections (18) to unfold the whole device; 3) Move the conveyor belt support frame (19) horizontally to unfold the whole sludge conveyor belt (6) and ensure the tension of the sludge conveyor belt (6); 4) Install a driving motor (22) on one of the conveyor belt drums (601) on one side at one end of the sludge conveyor belt (6); 5) Start the sludge conveying line, input the sludge into the device from the sludge inlet hopper (3), and at the same time start the driving motor (22) to make the sludge conveyor belt (6) run; 6) The sludge entering the device is agglomerated and broken by the sludge stirrer (4) and then falls on the sludge conveyor belt (6); 7) The broken sludge is conveyed by the sludge conveyor belt (6) and dispersed by the sludge spreading plate (5); 8) The sludge conveyor belt (6) conveys the sludge and dries the sludge. The sludge formed after the water in the sludge evaporates and dries falls into the dry sludge collection box (7) through the inclined plate (10); 9) Part of the evaporated water vapor is discharged through the exhaust pipe (16), and part of it is condensed by the condenser pipe (15) to form condensed water and then discharged through the condensed water discharge pipe (13).

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