Energy-saving sludge drying device capable of recovering waste heat

Abstract

The utility model relates to the technical field of sludge drying devices, in particular to an energy-saving sludge drying device capable of recovering waste heat, which comprises a case, a heat conducting plate is fixedly mounted in the case, electric heating rods are uniformly and fixedly mounted in the heat conducting plate, fans are uniformly and fixedly mounted in the case, and the electric heating rods are fixedly mounted in the case. A top cover is fixedly installed at the top end of the machine box, exhaust pipes are symmetrically and fixedly installed on the top cover, an air inlet pipe is fixedly installed on the top cover, heat dissipation fins are fixedly installed inside and outside the air inlet pipe, heat preservation pipes are fixedly installed on the outer side walls of the exhaust pipes, and the machine box communicates with the exhaust pipes through air guide pipes. The temperature of the entering air is lower than that of the exhausted air, so that the heat dissipation fins can heat the air entering from the air inlet pipe, the entering air is preheated to a certain degree, heat energy recovery is achieved, heat energy loss is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge drying devices, and in particular to an energy-saving sludge drying device that recovers waste heat. Background Technology

[0002] In today's environmental protection and resource recycling fields, effective sludge drying during sludge treatment is of paramount importance and value. In practical applications, sludge drying equipment typically requires the following technologies:

[0003] 1. A highly efficient heating system, such as steam heating or electric heating, can provide sufficient heat for sludge drying;

[0004] 2. A high-efficiency mixing system, such as a multi-layer paddle mixer, can ensure that the sludge is heated evenly during the drying process.

[0005] 3. Good ventilation equipment, such as high-powered fans, ensures that moisture is removed in a timely manner during the drying process.

[0006] An existing Chinese patent, CN221565996U, describes a sludge treatment and drying device. It includes a crushing main body with a transmission box fixed to one side. The transmission box is connected to a first rotating shaft, on which a first crushing roller is fixed. A second crushing roller is connected to one side of the first crushing roller, and a second rotating shaft is fixed inside the second crushing roller. The second rotating shaft passes through the crushing main body, and an inclined plate is provided at the bottom of the second rotating shaft. A filter plate is fixedly connected to one side of the inclined plate. This sludge treatment and drying device crushes household waste or foreign objects in the sludge before heating it in a lower heating tank. Mixing blades continuously disperse the sludge, increasing drying efficiency. This combination of structures enables rapid drying of the input sludge after crushing and filtering.

[0007] However, during the implementation of the above technical solution, at least the following technical problems were found: the above drying device heats and dries the sludge by using a hot air blower. The water in the heated sludge will evaporate and be discharged. The discharged water contains a large amount of heat, resulting in a waste of energy. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides an energy-saving sludge drying device that recovers waste heat, solving the technical problem that the aforementioned drying devices use a hot air blower to heat and dry the sludge, resulting in the evaporation and discharge of water containing a large amount of heat, thus wasting energy.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An energy-saving sludge drying device for recovering waste heat includes a casing, a heat-conducting plate fixedly installed inside the casing, electric heating rods uniformly fixedly installed inside the heat-conducting plate, a fan uniformly fixedly installed inside the casing, a top cover fixedly installed on the top of the casing, exhaust pipes symmetrically fixedly installed on the top cover, an air inlet pipe fixedly installed on the top cover, heat dissipation fins fixedly installed inside and outside the air inlet pipe, an insulation pipe fixedly installed on the outer wall of the exhaust pipe, and the casing and the exhaust pipe are connected by a duct.

[0011] Preferably, the internal components of the chassis are symmetrically equipped with rotating drive rollers.

[0012] Preferably, a conveyor belt is installed between the two drive rollers.

[0013] Preferably, a scraper plate is fixedly installed inside the chassis.

[0014] Preferably, a mudguard is fixedly installed inside the chassis.

[0015] Preferred: A scraper is fixedly installed inside the chassis.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. As the fan continuously draws external air into the chassis, the pressure inside the chassis increases. Consequently, the hot air at the bottom of the chassis enters the exhaust pipe through the air ducts at both ends and is then discharged through the exhaust pipe. During the discharge process, the heat of the hot air is transferred to the heat dissipation fins. Since the air entering through the intake pipe is at room temperature (the intake pipe opening is connected to the extension pipe to prevent the exhaust air from being directly sucked into the chassis), the temperature of the incoming air is lower than that of the exhaust air. Therefore, the heat dissipation fins will heat the air entering through the intake pipe, preheating it to a certain extent. This achieves heat recovery, reduces heat loss, and achieves energy saving.

[0018] Second, after the sludge falls onto the lower sludge plate, it will slide onto the conveyor belt. The counterclockwise rotation of the conveyor belt will move the sludge into the machine. During this process, the scraper plate will scrape the sludge on the conveyor belt to make the sludge thinner and spread evenly on the conveyor belt. This can prevent the sludge from becoming thick and unable to be fully heated, thus improving the drying quality of the sludge. Attached Figure Description

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] Figure 1This is a structural diagram of the chassis of this utility model;

[0021] Figure 2 This is a cross-sectional view of the front of the chassis of this utility model;

[0022] Figure 3 This is a side cross-sectional view of the chassis of this utility model;

[0023] Figure 4 This is a cross-sectional structural diagram of the insulation pipe of this utility model;

[0024] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A;

[0025] Figure 6 This is a structural diagram of the heat-conducting plate of this utility model.

[0026] Legend: 1. Chassis; 2. Drive roller; 3. Conveyor belt; 4. Heat conduction plate; 5. Electric heating rod; 6. Fan; 7. Top cover; 8. Exhaust pipe; 9. Inlet pipe; 11. Heat dissipation fins; 12. Insulation pipe; 13. Air guide pipe; 14. Scraper plate; 15. Lower mud plate; 16. Scraper plate. Detailed Implementation

[0027] This application provides an energy-saving sludge drying device that recovers waste heat, effectively solving the technical problem of the aforementioned drying device. The device uses a hot air blower to heat and dry the sludge, but the heated sludge evaporates and is discharged, resulting in a large amount of heat in the discharged water, leading to energy waste. Because the blower continuously draws external air into the casing, the pressure inside the casing increases. Therefore, the hot air at the bottom of the casing enters the exhaust pipe through the air guide pipes at both ends and is finally discharged through the exhaust pipe. During the hot air discharge process, the heat of the hot air is transferred to the heat dissipation fins. Since the air entering through the intake pipe is at room temperature (the intake pipe is open...), the heat is transferred to the heat dissipation fins. The inlet is connected to the extension pipe to prevent the exhaust air from being directly drawn into the chassis. The temperature of the incoming air is lower than that of the exhaust air, so the heat sink fins will heat the air entering through the intake pipe, preheating it to a certain extent. This achieves heat recovery, reduces heat loss, and achieves energy saving. After the sludge falls onto the lower mud plate, it will slide onto the conveyor belt. The counterclockwise rotation of the conveyor belt will move the sludge into the chassis. During this process, the scraper plate will flatten the sludge on the conveyor belt, making the sludge thinner and more evenly spread on the conveyor belt. This prevents the sludge from becoming too thick and unable to be fully heated, thus improving the quality of sludge drying.

[0028] Example

[0029] like Figure 1 , Figure 2 , Figure 3, Figure 4 , Figure 5 and Figure 6 As shown, the technical solution in this application embodiment effectively solves the problem of the aforementioned drying device, which uses a hot air blower to heat and dry the sludge. The heated sludge will evaporate and be discharged, but the discharged water contains a large amount of heat, resulting in energy waste. The overall concept is as follows:

[0030] In view of the problems existing in the prior art, this utility model provides an energy-saving sludge drying device for recovering waste heat, including a casing 1, a heat-conducting plate 4 fixedly installed inside the casing 1, electric heating rods 5 uniformly fixedly installed inside the heat-conducting plate 4, a fan 6 uniformly fixedly installed inside the casing 1, and a top cover 7 fixedly installed on the top of the casing 1.

[0031] Exhaust pipes 8 are symmetrically fixedly installed on the top cover 7, and air intake pipes 9 are fixedly installed on the top cover 7. Heat dissipation fins 11 are fixedly installed on both the inside and outside of the air intake pipes 9. Insulation pipes 12 are fixedly installed on the outer side wall of the exhaust pipes 8. The chassis 1 and the exhaust pipes 8 are connected by air guide pipes 13.

[0032] Inside the housing 1, drive rollers 2 are symmetrically rotated and installed. A conveyor belt 3 is installed between the two drive rollers 2. Inside the housing 1, scraper plate 14 is fixedly installed. Inside the housing 1, mud lowering plate 15 is fixedly installed. Inside the housing 1, scraper plate 16 is fixedly installed.

[0033] Working principle:

[0034] The first step is to connect the drive roller 2 to the transmission mechanism during installation, connect the electric heating rod 5 and the fan 6 to the PLC control system, and connect the top end of the air inlet pipe 9 to the extension pipe. During use, the sludge can be fed onto the lower sludge plate 15 via a conveying mechanism such as a screw feeder. Driven by the transmission mechanism, the drive roller 2 will rotate the conveyor belt 3 counterclockwise. After falling onto the lower sludge plate 15, the sludge will slide onto the conveyor belt 3. The counterclockwise rotation of the conveyor belt 3 will move the sludge into the machine housing 1. During this process, the scraper plate 14 will flatten the sludge on the conveyor belt 3, spreading a thin layer of sludge evenly across the conveyor belt. 3. When the electric heating rod 5 and the fan 6 are started, the fan 6 will draw outside air into the inside of the casing 1 through the air inlet pipe 9. After the electric heating rod 5 is started, it will heat the heat conduction plate 4. When the sludge enters the inside of the casing 1, the outside air will be pushed by the fan 6, pass through the heat conduction plate 4 and blow towards the sludge. The air will be heated into hot air when it passes through the heat conduction plate 4. The hot air blown towards the sludge will heat the sludge. When the sludge is heated and dried, it will be transported out by the conveyor belt 3 and discharged from the side of the casing 1. If there is sludge attached to the conveyor belt 3, the scraper 16 will scrape off the attached sludge when the conveyor belt 3 rotates.

[0035] In the second step, after the sludge temperature rises, the internal moisture will evaporate and enter the lower part of the chassis 1 along with the hot air (the conveyor belt 3 divides the chassis 1 into upper and lower parts, and the hot air will enter the lower part of the chassis 1 along the gap between the two sides of the conveyor belt 3 and the chassis 1). As the fan 6 continuously draws external air into the chassis 1, the pressure inside the chassis 1 will increase. Therefore, the hot air at the bottom of the chassis 1 will enter the exhaust pipe 8 along the air guide pipes 13 at both ends, and finally be discharged from the exhaust pipe 8. During the process of hot air discharge, the heat of the hot air will be transferred to the heat dissipation fins 11. Since the air entering along the intake pipe 9 is room temperature air (the opening of the intake pipe 9 is connected to the extension pipe to avoid directly sucking the discharged air into the chassis 1), the temperature of the incoming air is lower than that of the discharged air. Therefore, the heat dissipation fins 11 will heat the air entering through the intake pipe 9, so that the incoming air is preheated to a certain extent, and heat energy is recovered.

[0036] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An energy-saving sludge drying device for recovering waste heat, comprising a casing (1), characterized in that, A heat-conducting plate (4) is fixedly installed inside the chassis (1). Electric heating rods (5) are uniformly fixedly installed inside the heat-conducting plate (4). A fan (6) is uniformly fixedly installed inside the chassis (1). A top cover (7) is fixedly installed at the top of the chassis (1). An exhaust pipe (8) is symmetrically fixedly installed on the top cover (7). An air inlet pipe (9) is fixedly installed on the top cover (7). Heat dissipation fins (11) are fixedly installed inside and outside the air inlet pipe (9). An insulation pipe (12) is fixedly installed on the outer wall of the exhaust pipe (8). The chassis (1) and the exhaust pipe (8) are connected by an air guide pipe (13).

2. The energy-saving sludge drying device for recovering waste heat as described in claim 1, characterized in that, The drive rollers (2) are symmetrically rotated inside the chassis (1).

3. The energy-saving sludge drying device for recovering waste heat as described in claim 2, characterized in that, A conveyor belt (3) is installed between the two drive rollers (2).

4. The energy-saving sludge drying device for recovering waste heat as described in claim 1, characterized in that, A scraper plate (14) is fixedly installed inside the chassis (1).

5. The energy-saving sludge drying device for recovering waste heat as described in claim 1, characterized in that, The chassis (1) is fixedly installed with a lower mud plate (15).

6. The energy-saving sludge drying device for recovering waste heat as described in claim 1, characterized in that, A scraper (16) is fixedly installed inside the chassis (1).

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