Sludge drying treatment device and sludge drying treatment method

Abstract

The present invention relates to a sludge drying treatment device and method, which aims to provide an environmentally friendly and economical sludge management solution for municipal wastewater treatment plants. The device has a sealed housing, inside which a laterally expandable sludge conveying belt is installed, enabling efficient material transport. A sludge inlet hopper is installed at one end of the housing to smoothly introduce sludge into the treatment process, and a dried sludge collection box is connected to the other end of the housing. A dried sludge collection tray is located inside the box. A specially designed inclined plate ensures that the dried sludge is transported from the end of the conveying belt to the collection tray without leakage. A solar panel is installed on the top of the device, and a foldable section is provided to maximize solar energy utilization and improve drying efficiency. A folding housing section at the bottom further optimizes the device's spatial adaptability. The overall design is simple and easy to operate, significantly reducing maintenance costs. It also significantly reduces the moisture content of the sludge, thereby reducing subsequent processing and transportation costs.

Description

[Technical Field]

[0001] The present invention relates to the technical field of urban dredging, and more particularly to a sludge drying treatment apparatus and a sludge drying treatment method. [Background technology]

[0002] In recent years, the rapid development of China's wastewater treatment industry has led to a sharp increase in sludge generation, resulting in a significant discrepancy between sludge treatment capacity and production volume. This discrepancy is particularly pronounced in municipal wastewater treatment plants, which are relatively small, typically with treatment capacities of less than 500 cubic meters per day. In these economically and technologically underdeveloped areas, traditional sludge treatment equipment such as multi-disc screw presses, centrifugal dewatering machines, and plate-frame filter presses can treat sludge to a certain extent. However, due to limitations in the technical level of operators and the treatment capacity of the equipment, it is difficult to consistently control the final moisture content of sludge below 80%. Sludge with a high moisture content not only increases subsequent treatment and disposal costs, but can also cause environmental pollution problems.

[0003] To address this challenge, relevant government departments are continually improving sludge moisture content management standards and encouraging the wastewater treatment industry to explore more efficient and economical sludge treatment technologies. Municipal wastewater treatment plants, in particular, urgently need advanced drying solutions that can adapt to local conditions and effectively reduce sludge moisture content while keeping costs down. Traditional sludge drying methods often rely on mechanical dewatering or thermal drying, but these methods consume a lot of energy or require high equipment requirements, making them difficult to adopt in resource-limited municipal areas. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a sludge drying treatment device and a sludge drying treatment method, and the objective is to provide a sludge drying device that can fully utilize solar energy, has the characteristics of a simple structure, easy operation, and low maintenance costs, and at the same time, can effectively reduce the moisture content of sludge, reducing the costs of subsequent treatment and transportation, thereby providing a more environmentally friendly and economical sludge treatment solution for municipal wastewater treatment plants.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A sludge drying treatment device includes an apparatus housing, a sludge conveying belt installed within the apparatus housing, a sludge feeding hopper installed at one end of the apparatus housing, the output port of the sludge feeding hopper located above the input end of the sludge conveying belt, a dried sludge collection box installed on the outer wall at the other end of the apparatus housing, a dried sludge collection tray installed within the dried sludge collection box, an opening installed between the apparatus housing and the dried sludge collection box to communicate between them, an inclined plate installed within the opening, the upper end of the inclined plate located below the output end of the sludge conveying belt and the lower end located above the dried sludge collection tray. A solar panel is provided on the top of the device housing, and solar panel folding sections are provided on both sides of the solar panel via hinge axes, and housing folding sections are provided on both sides of the bottom plate of the device housing via hinge axes. The sludge transport belt can be laterally unfolded and folded.

[0006] In a preferred embodiment, a sludge agitator is provided in the sludge input hopper, and the sludge agitator is used to agitate and break down lumps in the input sludge.

[0007] In a preferred embodiment, a sludge leveling plate is provided on the inner upper surface of the device housing. The sludge leveling plate is installed close to the sludge input hopper. The distance between the bottom surface of the sludge leveling plate and the upper belt surface of the sludge transport belt is less than 2 cm. The sludge leveling plate is used to evenly spread and disperse the input sludge.

[0008] In a preferred embodiment, the sludge leveling plate is a "V" shaped plate, and the reflex angle of the sludge leveling plate is set toward the sludge input hopper.

[0009] In a preferred embodiment, a dry sludge collecting tray having a drawer structure is installed in the dry sludge collecting box.

[0010] In a preferred embodiment, the inclined plate is movably mounted within the opening via a pin shaft, and the upper end of the inclined plate extends to a point where it contacts the lower belt surface of the sludge transport belt. A support pillar is provided on the bottom surface of the device housing, and a spring is attached to the support pillar. A groove is provided on the bottom surface of the inclined plate, and a slidable slider is provided within the groove, and the upper end of the spring is fixedly connected to the slider.

[0011] In a preferred embodiment, the solar panel is provided with an exhaust pipe, a plurality of vertical condensation pipes are provided on the bottom surface of the solar panel, a condensate collection branch pipe is provided directly below the condensation pipe, the plurality of condensate collection branch pipes are installed on the same condensate discharge pipe, and one end of the condensate discharge pipe is provided to penetrate the end wall of the device housing. A support rod for fixing and supporting a condensed water discharge pipe is provided on the obtuse angle side of the sludge leveling plate.

[0012] In a preferred embodiment, the sludge transport belt is driven by a transport drum. Two transport drums are provided at the same end of the sludge transport belt, and the two transport drums are connected by a link, and the links are hinged together. A bearing is provided at the outer end of the transport drum, and the transport drum and the bearing are fixedly connected. A transport support frame is hingedly connected to the outer ring of the bearing. Slide grooves are provided on both sides of the bottom plate of the device housing and on the side of the housing folding section closest to the device housing, and the lower end of the transport support rack is installed in the slide groove on the bottom plate of the device housing and can move laterally to the housing folding section.

[0013] In a preferred embodiment, one of the transport drums is driven by a drive motor, and the drive shaft of the drive motor is provided to pass through a bearing.

[0014] The sludge drying treatment method based on the above-mentioned sludge drying treatment device includes the following steps. 1) The equipment is transported to the site and moved to the end of the sludge transport line. 2) Fold the folding parts of the two solar panels upwards, fold the folding parts of the two housings downwards, and unfold the entire device. 3) Move the transport support rack laterally to unfold the entire sludge transport belt and ensure tension on the sludge transport belt. 4) Attach a drive motor to the conveying drum at one end of the sludge conveying belt. 5) The sludge transport line is started, and sludge is fed into the equipment from the sludge feeding hopper. At the same time, the drive motor is started to operate the sludge transport belt. 6) The sludge that enters the device is broken down into clumps by the sludge agitator and then falls onto the sludge transport belt. 7) The crushed sludge is transported by a sludge transport belt and uniformly dispersed by a sludge leveling plate. 8) The sludge transport belt dries the sludge as it is transported, and the water in the sludge evaporates and the dried sludge falls into the dried sludge collection box by an inclined plate. 9) Some of the evaporated water is discharged from the exhaust pipe, and some is condensed in the condenser pipe to become condensed water, which is then discharged through the condensed water discharge pipe.

[0015] 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. (1) By combining a solar shelf with multiple functional modules, the sludge drying treatment device of the present invention can effectively utilize solar energy, greatly improve the efficiency and quality of sludge drying, and significantly reduce the costs of subsequent treatment and transportation. (2) The device is designed with an extendable structure, which can be deflated when not in use to reduce the space it occupies, making it easy to store and transport. When in use, the device can be quickly deployed to meet the needs of larger treatment areas, making it suitable for sewage treatment sites of various sizes. [Brief explanation of the drawings]

[0016] The invention will now be further explained with reference to the following figures and examples. [Figure 1] FIG. 1 is a diagram showing the internal structure of the present invention. [Figure 2] FIG. 2 is a diagram showing the end face structure of the present invention in a retracted state. [Figure 3] FIG. 3 is a diagram showing the end face structure of the present invention in an expanded state. DETAILED DESCRIPTION OF THE INVENTION

[0017] Example 1 One type of sludge drying treatment device includes an equipment housing 1, within which a sludge conveying belt 6 is installed, a sludge feeding hopper 3 is provided at one end of the equipment housing 1, the output port of the sludge feeding hopper 3 is located above the input end of the sludge conveying belt 6, a dried sludge collection box 7 is provided on the outer wall at the other end of the equipment housing 1, within which a dried sludge collection tray 8 is provided, an opening 9 is provided between the equipment housing 1 and the dried sludge collection box 7 to connect the two, within which an inclined plate 10 is provided, the upper end of the inclined plate 10 is located below the output end of the sludge conveying belt 6 and the lower end is located above the dried sludge collection tray 8. A solar panel 2 is provided on the top of the device housing 1, and solar panel folding sections 17 are provided on both sides of the solar panel 2 via hinge axes, and housing folding sections 18 are provided on both sides of the bottom plate of the device housing 1 via hinge axes. The sludge transport belt 6 can be deployed and stored laterally.

[0018] In the above embodiment, the horizontal storage and deployment of the sludge conveying belt 6 is mainly achieved by the horizontal movement of the conveying support racks 19 on both sides of the sludge conveying belt 6. By controlling the horizontal movement of the sludge conveying belt 6 on both sides of the sludge conveying belt 6, the sludge conveying belt 6 is transformed from the "V" shape shown in Figure 2 to the horizontally deployed state shown in Figure 3, thereby realizing the function of "horizontal deployment and storage."

[0019] When the sludge transport belt 6 needs to be stored, taking the state shown in Figure 3 as an example, the transport support frames 19 on both sides of the sludge transport belt 6 are moved toward the center, thereby bending the link 602 and ultimately converting the sludge transport belt 6 from the "deployed" state to the "stored" state.

[0020] In a preferred embodiment, a sludge agitator 4 is provided in the sludge charging hopper 3, and the sludge agitator 4 is used to agitate and break down lumps in the charged sludge.

[0021] In a preferred embodiment, a sludge leveling plate 5 is provided on the inner upper surface of the device housing 1, and the sludge leveling plate 5 is installed close to the sludge feeding hopper 3, and the distance between the bottom surface of the sludge leveling plate 5 and the upper belt surface of the sludge conveying belt 6 is less than 2 cm, and the sludge leveling plate 5 is used to uniformly distribute the sludge being fed in.

[0022] In a preferred embodiment, the sludge leveling plate 5 is a “V” shaped plate, and the reflex angle of the sludge leveling plate 5 is set toward the sludge input hopper 3 .

[0023] In a preferred embodiment, a dry sludge collecting tray 8 having a drawer type structure is installed in the dry sludge collecting box 7 .

[0024] In a preferred embodiment, the inclined plate 10 is movably mounted within the opening 9 via a pin shaft, and the upper end of the inclined plate 10 extends to a point where it comes into contact with the lower belt surface of the sludge transport belt 6. A support pillar 11 is provided on the bottom surface of the device housing 1, and a spring 12 is attached to the support pillar 11. A groove 1001 is provided on the bottom surface of the inclined plate 10, and a slidable slider 1002 is provided within the groove 1001. The upper end of the spring 12 is fixedly connected to the slider 1002.

[0025] In a preferred embodiment, the solar panel 2 is provided with an exhaust pipe 16, a plurality of vertical condensation pipes 15 are provided on the bottom surface of the solar panel 2, a condensed water recovery branch pipe 14 is provided directly below the condensation pipes 15, and the plurality of condensed water recovery branch pipes 14 are installed in the same condensed water discharge pipe 13, one end of which is provided to penetrate the end wall of the device housing 1. A support rod 131 for fixing and supporting the condensed water discharge pipe 13 is provided on the obtuse angle side of the sludge leveling plate 5 .

[0026] In a preferred embodiment, the sludge transport belt 6 is driven by a transport drum 601, and the same end of the sludge transport belt 6 includes two transport drums 601, which are connected by a link 602 and the links 602 are hingedly connected to each other, a bearing 20 is provided at the outer end of the transport drum 601, the transport drum 601 and the bearing 20 are fixedly connected, and a transport support frame 19 is hingedly connected to the outer ring of the bearing 20. Slide grooves 21 are provided on both sides of the bottom plate of the device housing 1 and on the side of the housing folding section 18 closer to the device housing 1, and the lower end of the transport support rack 19 is installed in the slide grooves 21 on the bottom plate of the device housing 1 and can move laterally up to above the housing folding section 18.

[0027] In a preferred embodiment, one of the transport drums 601 is driven by a drive motor 22 , and the drive shaft of the drive motor 22 is provided to pass through a bearing 20 .

[0028] Example 2 The sludge drying treatment method based on the sludge drying treatment device described in Example 1 includes the following steps. 1) Transport the equipment to the site and move it to the end of the sludge transport line. 2) Fold the two solar panel folding sections 17 upward, fold the two housing folding sections 18 downward, and unfold the entire device. 3) Move the transport support rack 19 laterally to unfold the entire sludge transport belt 6 and ensure tension on the sludge transport belt 6. 4) A drive motor 22 is attached to the transport drum 601 at one end of the sludge transport belt 6. 5) The sludge transport line is started, and sludge is introduced into the device from the sludge introduction hopper 3. At the same time, the drive motor 22 is started to operate the sludge transport belt 6. 6) The sludge that enters the device is broken down into clumps by the sludge agitator 4, and then falls onto the sludge transport belt 6. 7) The crushed sludge is transported by the sludge transport belt 6 and uniformly dispersed by the sludge leveling plate 5. 8) The sludge transport belt 6 dries the sludge while transporting it, and the water in the sludge evaporates and the dried sludge falls into the dried sludge collection box 7 by the inclined plate 10. 9) Of the evaporated water, a portion is discharged through the exhaust pipe 16, and a portion is condensed in the condenser pipe 15 to become condensed water, which is then discharged through the condensed water discharge pipe 13.

[0029] Example 3 Actual operation example (1) Assembly and placement of the equipment In a typical municipal wastewater treatment plant, the daily wastewater treatment volume is assumed to be 250 cubic meters, and 0.2 cubic meters of sludge with a moisture content of 80% must be treated. The sludge drying treatment device of the present invention is installed to treat this sludge. Initial state: The device is in its stowed state, measuring 3.5m x 1m, allowing for easy transport and storage.

[0030] (2) Preparation stage The device is moved to the designated position and is stably placed using the first roller 101 and the second roller 701. The housing folding portion 18 of the bottom plate of the device housing 1 is folded downward, and then the solar panel folding portion 17 of the solar panel 2 is folded upward, and the device is extended. The transport support frame 19 at the end of the sludge transport belt 6 is pulled to unfold the sludge transport belt 6 to the state shown in Figure 3. At this point, the dimensions of the device are 3.5m x 3m, and preparation for the extended state is complete.

[0031] (3) Pre-operation check Check that all parts are installed correctly. Make sure that the condensate discharge pipe 13 and the condensate collection branch pipe 14 are in communication, and that the exhaust pipe 16 is not clogged. Make sure the sludge transport belt 6 is straight and not too loose or too tight.

[0032] Driving process (1) Loading: The high moisture content sludge to be treated is placed in the sludge loading hopper 3, and the device is started. (2) Agitation and homogenization: As the sludge falls, it is agitated by the sludge agitator 4, broken into smaller chunks, and then uniformly dispersed on the sludge transport belt 6. The sludge leveling plate 5 ensures that the sludge layer has an appropriate thickness and promotes water evaporation. (3) Drying: The solar energy is used in the solar shelf to accelerate the evaporation of water, while the exhaust pipe 16 maintains air circulation to improve the drying speed. When the temperature is below 40°C, the conveying speed is set to 0.2 m / h in the first stage. When the temperature is between 40 and 50°C, adjust the speed to 0.3 m / h in the second stage. If the temperature exceeds 50°C, increase the speed to 0.4 m / h in the third stage. (4) Condensate management: The evaporated water is condensed in the condenser pipe 15 and safely discharged through the condensate discharge pipe 13 to prevent the water from affecting the drying efficiency. (5) Discharge: The dried sludge is transported to the opening 9 by the sludge transport belt 6, and collected and discharged by the dried sludge collection tray 8.

[0033] Results evaluation Under conditions of sufficient sunlight in summer, the device can dry 0.2 cubic meters of sludge with a moisture content of 80% to 60%, achieving the expected goal. The volume of sludge after treatment is reduced, making it easier to store and transport, and reducing subsequent treatment costs. The device has low energy consumption, with only a small amount of electricity required to operate the sensors and conveyor belt, and most of the energy being obtained from sunlight, making it environmentally friendly and economical.

[0034] Storage and preservation After the processing operation is completed, the device is returned to its stowed state in the reverse order, facilitating storage or transportation to another location. Through the above embodiments, the sludge drying treatment device of the present invention has excellent performance in application in municipal sewage treatment plants, improving drying efficiency and reducing operating costs, demonstrating its feasibility and advantages in practical situations. [Explanation of symbols]

[0035] 1. Device housing 101 First Roller 2. Solar panels 3 Sludge input hopper 4 Sludge agitator 5 Sludge leveling board 6 Sludge conveying belt 601 Transport drum 602 Links 7. Dried sludge collection box 701 Second Roller 8 Dried sludge collection tray 9 Openings 10 Inclined plate 1001 Groove 1002 slider 11 Posts 12 Spring 13 Condensate drain pipe 131 Support rod 14 Condensate collection branch pipe 15 Condenser tube 16 Exhaust pipe 17 Solar panel folding section 18 Folding housing 19 Transport support rack 20 bearings 21 Slide groove 22 Drive motor

Claims

1. A sludge drying treatment device, comprising: an apparatus housing (1); A sludge transport belt (6) is installed within the equipment housing (1), a sludge input hopper (3) is provided at one end of the equipment housing (1), the output port of the sludge input hopper (3) is located above the input end of the sludge transport belt (6), a dried sludge collection box (7) is provided on the outer wall at the other end of the equipment housing (1), a dried sludge collection tray (8) is provided within the dried sludge collection box (7), an opening (9) is provided between the equipment housing (1) and the dried sludge collection box (7) to communicate between them, an inclined plate (10) is provided within the opening (9), the upper end of the inclined plate (10) is located below the output end of the sludge transport belt (6), and the lower end of the inclined plate (10) is located above the dried sludge collection tray (8), A solar panel (2) is provided on the top of the device housing (1), solar panel folding sections (17) are provided on both sides of the solar panel (2) via hinge shafts, and housing folding sections (18) are provided on both sides of the bottom plate of the device housing (1) via hinge shafts; The sludge drying treatment device is characterized in that the sludge transport belt (6) can be deployed and stored laterally.

2. 2. The sludge drying treatment device according to claim 1, wherein a sludge agitator (4) is provided in the sludge input hopper (3), and the sludge agitator (4) is configured to agitate and crush lumps in the input sludge.

3. The sludge drying treatment device according to claim 1, characterized in that a sludge leveling plate (5) is provided on the inner upper surface of the device housing (1), the sludge leveling plate (5) is installed close to the sludge input hopper (3), the distance between the bottom surface of the sludge leveling plate (5) and the upper belt surface of the sludge transport belt (6) is less than 2 cm, and the sludge leveling plate (5) is configured to evenly spread and distribute the input sludge.

4. 4. The sludge drying treatment device according to claim 3, wherein the sludge leveling plate (5) is a "V" shaped plate, and the reflex angle of the sludge leveling plate (5) is set toward the sludge input hopper (3).

5. 2. The sludge drying treatment device according to claim 1, wherein the dried sludge collecting tray (8) has a drawer-type structure and is installed in the dried sludge collecting box (7).

6. The inclined plate (10) is movably attached within the opening (9) via a pin shaft, and the upper end of the inclined plate (10) extends to a point where it contacts the lower belt surface of the sludge transport belt (6); The sludge drying treatment device according to claim 1, characterized in that a support (11) is provided on the bottom surface of the device housing (1), a spring (12) is attached to the support (11), a strip-shaped groove (1001) is provided on the bottom surface of the inclined plate (10), a slidable slider (1002) is provided within the strip-shaped groove (1001), and the upper end of the spring (12) is fixedly connected to the slider (1002).

7. An exhaust pipe (16) is provided on the solar panel (2), a plurality of vertical condensation pipes (15) are provided on the bottom surface of the solar panel (2), a condensed water recovery branch pipe (14) is provided directly below the condensation pipes (15), the plurality of condensed water recovery branch pipes (14) are connected to the same condensed water discharge pipe (13), and one end of the condensed water discharge pipe (13) penetrates an end wall of the device housing (1), 2. The sludge drying treatment device according to claim 1, wherein a support rod (131) for fixing and supporting the condensed water discharge pipe (13) is provided on the obtuse angle side of the sludge leveling plate (5).

8. The sludge transport belt (6) is driven by a transport drum (601), two transport drums (601) are provided at the same end of the sludge transport belt (6), the two transport drums (601) are connected by a link (602), the links (602) are hinged to each other, a bearing (20) is provided at the outer end of the transport drum (601), the transport drum (601) and the bearing (20) are fixedly connected, and a transport support frame (19) is hinged to the outer ring of the bearing (20), A sludge drying treatment device as described in claim 1, characterized in that slide grooves (21) are provided on both sides of the bottom plate of the device housing (1) and on the side of the housing folding section (18) closer to the device housing (1), and the lower end of the transport support rack (19) is installed in the slide groove (21) on the bottom plate of the device housing (1) and can move laterally up to above the housing folding section (18).

9. The sludge drying treatment device according to claim 8, characterized in that one of the transport drums (601) is driven by a drive motor (22), and the drive shaft of the drive motor (22) is provided to pass through the bearing (20).

10. A sludge drying treatment method, comprising: 1) The equipment is transported to the site and moved to the end of the sludge transport line. 2) Fold the two solar panel folding parts (17) upward, fold the two housing folding parts (18) downward, and unfold the entire device; 3) The transport support rack (19) is moved laterally to unfold the entire sludge transport belt (6) and ensure tension on the sludge transport belt (6); 4) A drive motor (22) is attached to the conveying drum (601) at one end of the sludge conveying belt (6); 5) The sludge transport line is started, and sludge is introduced into the device from the sludge introduction hopper (3), and at the same time, the drive motor (22) is started to operate the sludge transport belt (6); 6) The sludge that enters the device is broken into clumps by the sludge agitator (4), and then falls onto the sludge conveyor belt (6). 7) The crushed sludge is transported by the sludge transport belt (6) and uniformly dispersed by the sludge leveling plate (5). 8) The sludge transport belt (6) dries the sludge while transporting it, and the sludge that has been dried as the water in the sludge evaporates falls into the dried sludge collection box (7) by the inclined plate (10). 9) A part of the evaporated water is discharged through the exhaust pipe (16), and a part is condensed into condensed water through the condensation pipe (15), and then discharged through the condensed water discharge pipe (13). A sludge drying treatment method based on the sludge drying treatment apparatus according to any one of claims 1 to 9, comprising the steps described above.

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