Sludge drying waste heat utilization device

Abstract

The invention discloses a sludge drying waste heat utilization device which comprises a filtering mechanism, a waste heat output pipe is installed on the side face of the filtering mechanism, an air suction and liquid drainage mechanism is installed at the top of the inner side of the filtering mechanism, a treatment box is installed at the top of the filtering mechanism, and a partition plate is arranged in the treatment box. A partition plate is arranged in the treatment box and divides the treatment box into a first-stage treatment cavity and a second-stage treatment cavity, a first-stage waste heat utilization assembly is installed in the first-stage treatment cavity, the bottom of the first-stage waste heat utilization assembly is connected with the output end of the air suction and liquid drainage mechanism, and the output end of the first-stage waste heat utilization assembly is connected with a second-stage waste heat utilization assembly; the second-stage waste heat utilization assembly is installed in the second-stage treatment cavity, water inlet pipes are installed on one sides of the tops of the first-stage treatment cavity and the second-stage treatment cavity, water outlet pipes are installed on one sides of the bottoms of the first-stage treatment cavity and the second-stage treatment cavity, and the treatment box is provided with an exhaust port in the top of the second-stage treatment cavity.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat utilization, and in particular relates to a sludge drying waste heat utilization device. Background Art

[0002] Sludge drying is the process of removing moisture from sludge by physical or chemical means, aiming to reduce its moisture content to achieve reduction, stabilization and harmless treatment. Existing sludge drying evaporates water through heat transfer (steam, thermal oil, etc.).

[0003] However, in the sludge drying process, a large amount of energy is usually consumed to evaporate the water in the sludge. At the same time, the waste heat generated in the drying process is mostly discharged directly into the environment, resulting in serious waste of energy, increasing the cost of sludge treatment, and causing certain thermal pollution to the environment. In the existing technology, the utilization efficiency of waste heat is low, and the waste heat cannot be fully recovered and reasonably distributed. At the same time, the waste heat gas often contains impurities. If it is not effectively filtered and treated, it will not only affect the waste heat utilization effect, but may also cause damage to the equipment. Therefore, there is an urgent need for a sludge drying waste heat utilization device to solve the above problems. Summary of the Invention

[0004] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a sludge drying waste heat utilization device.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0006] A sludge drying waste heat utilization device comprises a filtering mechanism, a waste heat output pipe is installed on the side of the filtering mechanism, an air suction and discharge mechanism is installed on the inner top of the filtering mechanism, a treatment box is installed on the top of the filtering mechanism, a partition plate is provided in the treatment box, the partition plate divides the treatment box into two parts to form a primary treatment chamber and a secondary treatment chamber, a primary waste heat utilization component is installed in the primary treatment chamber, the bottom of the primary waste heat utilization component is connected to the output end of the air suction and discharge mechanism, the output end of the primary waste heat utilization component is connected to the secondary waste heat utilization component, the secondary waste heat utilization component is installed in the secondary treatment chamber, a water inlet pipe is installed on one side of the top of the primary treatment chamber and the secondary treatment chamber, a water outlet pipe is installed on one side of the bottom of the primary treatment chamber and the secondary treatment chamber, and the treatment box is provided with an exhaust port at the top of the secondary treatment chamber.

[0007] The filter mechanism further comprises a filter box, a drawer frame is slidably mounted in the filter box, and a coarse filter layer, a fine filter layer, and an adsorption layer are sequentially mounted in the drawer frame from bottom to top. This structural design facilitates the filtration of waste heat gas after sludge drying.

[0008] Furthermore, the coarse filter layer is a metal mesh, the fine filter layer is a glass fiber filter paper, and the adsorption layer is an activated carbon adsorption layer. This structural design facilitates filtering impurities in the waste heat gas and adsorbing harmful gases and odorous substances in the waste heat gas.

[0009] It is further defined that the drawer frame is provided with guide slots on both sides, wherein guide blocks are slidably connected in the guide slots, and the guide blocks are fixedly mounted on the inner wall of the filter box, and the guide slots and the guide blocks are arranged in a T-shaped structure. Such a structural design facilitates the guided installation of the drawer frame.

[0010] The filter box is further defined as having a water storage tank mounted at the bottom thereof, an opening at the top thereof, a filter basket mounted at the top thereof, and handles mounted on the outside of the pull-out frame and the water storage tank. This structural design facilitates the collection of condensed water formed after the waste heat gas is cooled.

[0011] Furthermore, the filter box is provided with a guide seat mounted between the drawer frame and the water tank. A guide groove, larger at the top and smaller at the bottom, is provided at the center of the guide seat. The output end of the waste heat output pipe is positioned within the guide groove. This structural design allows impurities and condensed water to flow into the water tank along the guide groove.

[0012] It is further defined that the air intake and liquid discharge mechanism includes a main pipe, the output end of the main pipe is connected to the input end of the first-stage waste heat utilization component, the bottom side of the main pipe is connected to an air intake pipe, a one-way valve is installed in the air intake pipe, the input end of the air intake pipe is installed with an air intake hood, a micro exhaust fan is installed in the air intake hood, a liquid discharge pipe is installed on the other side of the bottom of the main pipe, the liquid discharge pipe is arranged in an L-shaped structure and extends to the inside of the filter box, the pull-out frame is provided with an air avoidance groove at the corresponding liquid discharge pipe, the liquid discharge pipe is arranged in the air avoidance groove, and the bottom output end of the liquid discharge pipe is arranged on the upper side of the guide groove. Such a structural design can draw the treated waste heat gas into the first-stage waste heat utilization component for waste heat utilization, and at the same time, the condensed water after heat exchange cooling is output through the liquid discharge pipe under the effect of gravity.

[0013] The primary waste heat recovery assembly further defines a structure comprising a spirally arranged heat exchange tube, the bottom input end of which is connected to the output end of the main pipe, and the output end of which is connected to the secondary waste heat recovery assembly. This structural design allows for efficient stratification of waste heat gas with different characteristics, significantly improving waste heat utilization efficiency.

[0014] It is further defined that the secondary waste heat utilization component includes a diverter cover and a converging cover installed on the upper and lower sides of the secondary treatment chamber, the output end of the heat exchange tube is arranged in the diverter cover, a diverter baffle is installed on the top of the inner side of the diverter cover, the output end of the diverter baffle is connected to a number of secondary heat exchange tubes, a fixed baffle is installed on the other side of the several secondary heat exchange tubes, the fixed baffle is fixedly installed on the bottom of the converging cover, the water inlet pipe and the water outlet pipe are arranged between the diverter baffle and the fixed baffle, and the top of the converging cover is connected to the exhaust port. Such a structural design can carry out efficient layered utilization of waste heat gases with different characteristics, significantly improving the waste heat utilization efficiency.

[0015] It is further defined that the processing box is equipped with an exhaust chimney at the exhaust port, and a protective cap is installed on the top of the exhaust chimney. Such a structural design achieves a tail exhaust effect and prevents impurities from falling into the exhaust chimney.

[0016] The beneficial effects of the present invention are as follows: by arranging the first-level waste heat utilization components and the second-level waste heat utilization components in a hierarchical manner, waste heat gases with different characteristics are efficiently utilized in layers, which significantly improves the waste heat utilization efficiency; through the setting of the filtering mechanism, the waste heat gas is effectively purified, ensuring the normal operation of the equipment and the waste heat utilization effect, and optimizing the waste heat utilization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of the axial structure of a sludge drying waste heat utilization device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of a sludge drying waste heat utilization device according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a vertical cross-sectional structure of a filtering mechanism of a sludge drying waste heat utilization device according to an embodiment of the present invention;

[0021] The main component symbols are described as follows:

[0022] Filter mechanism 1, waste heat output pipe 2, air suction and discharge mechanism 3, treatment box 4, partition plate 5, primary treatment chamber 6, secondary treatment chamber 7, primary waste heat utilization component 8, secondary waste heat utilization component 9, water inlet pipe 10, water outlet pipe 11, exhaust port 12, filter box 13, pull-out frame 14, coarse filter layer 15, fine filter layer 16, adsorption layer 17, guide slide 18, guide block 19, water storage tank 20, filter basket 21, handle 22, guide seat 23, guide groove 24, main pipe 25, air suction pipe 26, one-way valve 27, air suction hood 28, micro exhaust fan 29, discharge pipe 30, air avoidance groove 31, heat exchange pipe 32, diverter hood 33, confluence hood 34, diverter partition 35, secondary heat exchange pipe 36, fixed partition 37, exhaust chimney 38, protective cap 39. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1, as Figure 1 and Figure 2 As shown, a sludge drying waste heat utilization device is provided, wherein a waste heat output pipe 2 is installed on the side of the filter mechanism 1, an air suction and discharge mechanism 3 is installed on the inner top of the filter mechanism 1, a treatment box 4 is installed on the top of the filter mechanism 1, a partition plate 5 is provided in the treatment box 4, the partition plate 5 divides the treatment box 4 into two parts to form a primary treatment chamber 6 and a secondary treatment chamber 7, a primary waste heat utilization component 8 is installed in the primary treatment chamber 6, the bottom of the primary waste heat utilization component 8 is connected to the output end of the air suction and discharge mechanism 3, the output end of the primary waste heat utilization component 8 is connected to the secondary waste heat utilization component 9, the secondary waste heat utilization component 9 is installed in the secondary treatment chamber 7, a water inlet pipe 10 is installed on one side of the top of the primary treatment chamber 6 and the secondary treatment chamber 7, a water outlet pipe 11 is installed on one side of the bottom of the primary treatment chamber 6 and the secondary treatment chamber 7, and the treatment box 4 is provided with an exhaust port 12 at the top of the secondary treatment chamber 7.

[0025] In this embodiment, when in use, the waste heat gas generated by sludge drying enters the filter mechanism 1 through the waste heat output pipe 2, and the waste heat gas is filtered by the filter mechanism 1 to ensure that the gas entering the treatment box 4 is clean. Thereafter, the waste heat gas is input into the first-level waste heat utilization component 8 in the first-level treatment chamber 6 through the air suction and liquid discharge mechanism 3, and heat exchange is performed with the water in the first-level treatment chamber 6 through the first-level waste heat utilization component 8 to transfer the waste heat to the water, thereby realizing the initial utilization of the waste heat. After the heat exchange, the temperature of the waste heat gas is reduced, and the waste heat gas is output from the first-level waste heat utilization component 8 to the second-level waste heat utilization component 9. The waste heat gas in the second-level waste heat utilization component 9 continues to exchange heat with the cooling water in the second-level treatment chamber 7 to further utilize the waste heat. The heat of the gas after the second-level heat exchange is basically consumed, and finally discharged into the atmosphere from the exhaust port 12.

[0026] Among them, the primary treatment chamber 6 and the secondary treatment chamber 7 are filled with water through the water inlet pipe 10, and the water after the primary heat exchange and the secondary heat exchange flows out through the water outlet pipe 11. The output water can be used in other occasions requiring thermal energy.

[0027] Example 2, as Figure 1 、 Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 1, the filtering mechanism 1 includes a filter box 13, a pull-out frame 14 is slidably installed in the filter box 13, and a coarse filter layer 15, a fine filter layer 16 and an adsorption layer 17 are installed in the pull-out frame 14 from bottom to top.

[0028] In this embodiment, when in use, the waste heat gas generated by sludge drying enters the filter mechanism 1 through the waste heat output pipe 2, first passes through the coarse filter layer 15 in the pull-out frame 14 to intercept larger particles of impurities, then passes through the fine filter layer 16 to further filter out smaller particles of impurities, and finally passes through the adsorption layer 17 to adsorb harmful gases and odorous substances in the waste heat gas, thereby filtering the waste heat gas, and is discharged to the outside after heat exchange without causing pollution.

[0029] Example 3, as Figure 3 As shown, this embodiment adds the following structures on the basis of embodiment 2: the coarse filter layer 15 is a metal mesh, the fine filter layer 16 is a glass fiber filter paper, and the adsorption layer 17 is an activated carbon adsorption layer.

[0030] In this embodiment, when in use, the waste heat gas generated by sludge drying enters the filter mechanism 1 through the waste heat output pipe 2, first passes through the coarse filter layer 15 (metal wire mesh) in the pull-out frame 14, and is used to filter large particles of impurities in the waste heat gas through the metal wire mesh; then passes through the fine filter layer 16 (glass fiber filter paper), and is used to filter small particles of impurities through the glass fiber filter paper, and finally passes through the adsorption layer 17 (activated carbon adsorption layer), and is used to adsorb harmful gases and odorous substances in the waste heat gas through the activated carbon adsorption layer. Through the three-layer filter structure, the waste heat gas can be fully filtered and processed to ensure that the gas entering the first-level waste heat utilization component 8 is clean.

[0031] Example 4, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 2: guide grooves 18 are provided on both sides of the pull-out frame 14, and guide blocks 19 are slidably connected in the guide grooves 18. The guide blocks 19 are fixedly installed on the inner wall of the filter box 13, and the guide grooves 18 and the guide blocks 19 are arranged in a T-shaped structure.

[0032] In this embodiment, when it is necessary to clean or replace the coarse filter layer 15, fine filter layer 16 and adsorption layer 17 in the pull-out frame 14, it is only necessary to pull the pull-out frame 14 outward so that the pull-out frame 14 slides along the guide block 19 through the guide groove 18, thereby driving the coarse filter layer 15, fine filter layer 16 and adsorption layer 17 to be removed from the filter box 13, making it easy to disassemble and clean.

[0033] Example 5, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 2: a water tank 20 is installed at the bottom of the filter box 13, an opening is provided at the top of the water tank 20, a filter basket 21 is installed at the top opening of the water tank 20, and handles 22 are installed on the outside of the pull-out frame 14 and the water tank 20.

[0034] In this embodiment, during use, when the waste heat gas generated by sludge drying enters the filter mechanism 1 through the waste heat output pipe 2, the waste heat gas is filtered through the coarse filter layer 15 and the fine filter layer 16, and the particulate impurities generated fall downward into the filter basket 21 for collection under the effect of gravity. After the waste heat gas is cooled by heat exchange, the condensed water formed will be discharged through the suction and discharge mechanism 3, and enter the water tank 20 through the filter basket 21 for collection, thereby achieving the effect of solid-liquid separation.

[0035] Example 6, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 2: the filter box 13 is provided with a guide seat 23 between the pull-out frame 14 and the water storage tank 20; a guide groove 24 with a larger upper portion and a smaller lower portion is provided at the center of the guide seat 23; the output end of the waste heat output pipe 2 is provided on the guide groove 24.

[0036] In this embodiment, during use, the particulate impurities in the waste heat gas after being filtered through the coarse filter layer 15 and the fine filter layer 16 will be guided and output to the filter basket 21 through the guide groove 24 in the guide seat 23, and the condensed water generated after the waste heat gas is cooled by heat exchange will also be output to the water tank 20 through the guide groove 24.

[0037] Example 7, as Figure 2 and Figure 3As shown, this embodiment adds the following structure on the basis of embodiment 1, the air intake and discharge mechanism 3 includes a main pipe 25, the output end of the main pipe 25 is connected to the input end of the first-stage waste heat utilization component 8, the bottom side of the main pipe 25 is connected to an air intake pipe 26, a one-way valve 27 is installed in the air intake pipe 26, the input end of the air intake pipe 26 is installed with an air intake hood 28, and a micro exhaust fan 29 is installed in the air intake hood 28, and a drain pipe 30 is installed on the other side of the bottom of the main pipe 25. The drain pipe 30 is arranged in an L-shaped structure and extends to the inner side of the filter box 13. The pull-out frame 14 is provided with an air avoidance groove 31 corresponding to the drain pipe 30. The drain pipe 30 is arranged in the air avoidance groove 31, and the bottom output end of the drain pipe 30 is arranged on the upper side of the guide groove 24.

[0038] In this embodiment, during use, the one-way valve 27 and the micro-exhaust fan 29 are opened, so that the filtered waste heat gas is drawn into the suction hood 28 under the effect of the micro-exhaust fan 29, and then passes through the suction pipe 26 and is input into the main pipe 25 from the one-way valve 27 in the suction pipe 26, and finally output from the main pipe 25 to enter the first-level waste heat utilization component 8 for waste heat utilization. When the waste heat gas forms condensed water after heat exchange and cooling, the condensed water will flow back to the main pipe 25 along the first-level waste heat utilization component 8. Due to the provision of the one-way valve 27, the condensed water cannot enter the suction pipe 26 and can only flow into the drain pipe 30, and finally flows out from the bottom of the drain pipe 30 to the guide groove 24, and is guided and output into the water tank 20 through the guide groove 24.

[0039] Example 8, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1: the first-level waste heat utilization component 8 includes a heat exchange tube 32 arranged in a spiral shape, the bottom input end of the heat exchange tube 32 is connected to the output end of the main pipe 25, and the output end of the heat exchange tube 32 is connected to the second-level waste heat utilization component 9.

[0040] In this embodiment, when in use, the spirally arranged heat exchange tube 32 can increase the flow distance of the waste heat gas, and increase the contact time and contact area with the heat exchange tube 32, thereby improving the heat exchange efficiency. In the heat exchange tube 32, the waste heat gas exchanges heat with the cooling water outside the tube (entering the primary treatment chamber 6 through the water inlet pipe 10), and the waste heat is transferred to the cooling water, thereby realizing the initial utilization of the waste heat. After the heat exchange, the temperature of the waste heat gas is reduced, and it flows out from the output end of the heat exchange tube 32 and enters the secondary waste heat utilization component 9.

[0041] Example 9, as Figure 2As shown, this embodiment adds the following structure on the basis of embodiment 1, the secondary waste heat utilization component 9 includes a diverter cover 33 and a merging cover 34 installed on the upper and lower sides of the secondary treatment chamber 7, the output end of the heat exchange tube 32 is arranged in the diverter cover 33, and a diverter baffle 35 is installed on the top of the inner side of the diverter cover 33, the output end of the diverter baffle 35 is connected to a number of secondary heat exchange tubes 36, and a fixed baffle 37 is installed on the other side of the several secondary heat exchange tubes 36, and the fixed baffle 37 is fixedly installed at the bottom of the merging cover 34, the water inlet pipe 10 and the water outlet pipe 11 are arranged between the diverter baffle 35 and the fixed baffle 37, and the top of the merging cover 34 is connected to the exhaust port 12.

[0042] In this embodiment, the waste heat gas output from the primary waste heat utilization assembly 8 enters the diverter hood 33 within the secondary waste heat utilization assembly 9. Diverter baffles 35 evenly distribute the waste heat gas into a plurality of secondary heat exchange tubes 36. Within the secondary heat exchange tubes 36, the waste heat gas continues to exchange heat with cooling water outside the tubes (which enters the secondary processing chamber 7 through the water inlet pipe 10), further utilizing the waste heat. The cooling water after the secondary heat exchange flows out through the water outlet pipe 11 and can be used in other applications requiring thermal energy. The gas after the secondary heat exchange passes through the confluence hood 34 and is discharged from the exhaust port 12.

[0043] Example 10, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1: the processing box 4 is equipped with an exhaust chimney 38 at the exhaust port 12 , and a protective cap 39 is installed on the top of the exhaust chimney 38 .

[0044] In this embodiment, when in use, the gas after secondary heat exchange is discharged from the exhaust port 12 through the merging cover 34, and is input into the exhaust chimney 38, and finally discharged into the atmosphere through the exhaust chimney 38. The protective cap 39 on the top of the exhaust chimney can prevent impurities from falling into the exhaust chimney.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A sludge drying waste heat utilization device, characterized by: The invention comprises a filter mechanism (1), a waste heat output pipe (2) is installed on the side of the filter mechanism (1), an air suction and liquid discharge mechanism (3) is installed on the inner top of the filter mechanism (1), a processing box (4) is installed on the top of the filter mechanism (1), a partition plate (5) is provided in the processing box (4), and the partition plate (5) divides the processing box (4) into two to form a primary processing chamber (6) and a secondary processing chamber (7), a primary waste heat utilization component (8) is installed in the primary processing chamber (6), and the primary waste heat utilization component (8) The bottom of the first-stage waste heat utilization component (8) is connected to the output end of the air suction and liquid discharge mechanism (3); the output end of the first-stage waste heat utilization component (8) is connected to the second-stage waste heat utilization component (9); the second-stage waste heat utilization component (9) is installed in the second-stage treatment chamber (7); a water inlet pipe (10) is installed on one side of the top of the first-stage treatment chamber (6) and the second-stage treatment chamber (7); a water outlet pipe (11) is installed on one side of the bottom of the first-stage treatment chamber (6) and the second-stage treatment chamber (7); and the treatment box (4) is provided with an exhaust port (12) at the top of the second-stage treatment chamber (7).

2. The sludge drying waste heat utilization device according to claim 1, characterized in that: The filtering mechanism (1) comprises a filter box (13), a drawer frame (14) is slidably mounted in the filter box (13), and a coarse filter layer (15), a fine filter layer (16) and an adsorption layer (17) are sequentially mounted in the drawer frame (14) from bottom to top.

3. The sludge drying waste heat utilization device according to claim 2, characterized in that: The coarse filter layer (15) is a metal wire mesh, the fine filter layer (16) is a glass fiber filter paper, and the adsorption layer (17) is an activated carbon adsorption layer.

4. The sludge drying waste heat utilization device according to claim 3, characterized in that: Guide grooves (18) are provided on both sides of the pull-out frame (14), and guide blocks (19) are slidably connected in the guide grooves (18). The guide blocks (19) are fixedly mounted on the inner wall of the filter box (13), and the guide grooves (18) and the guide blocks (19) are arranged in a T-shaped structure.

5. The sludge drying waste heat utilization device according to claim 4, characterized in that: A water storage tank (20) is installed at the bottom of the filter box (13), an opening is provided at the top of the water storage tank (20), a filter basket (21) is installed at the top opening of the water storage tank (20), and handles (22) are installed on the outside of the pull-out frame (14) and the water storage tank (20).

6. The sludge drying waste heat utilization device according to claim 5, characterized in that: The filter box (13) is provided with a guide seat (23) between the drawer frame (14) and the water storage tank (20); a guide groove (24) with a larger upper portion and a smaller lower portion is provided at the center of the guide seat (23); and the output end of the waste heat output pipe (2) is provided on the guide groove (24).

7. The sludge drying waste heat utilization device according to claim 6, characterized in that: The air intake and liquid discharge mechanism (3) comprises a main pipe (25), the output end of the main pipe (25) is connected to the input end of the first-stage waste heat utilization component (8), a suction pipe (26) is connected to one side of the bottom of the main pipe (25), a one-way valve (27) is installed in the suction pipe (26), an air suction hood (28) is installed at the input end of the suction pipe (26), a micro exhaust fan (29) is installed in the suction hood (28), a liquid discharge pipe (30) is installed on the other side of the bottom of the main pipe (25), the liquid discharge pipe (30) is arranged in an L-shaped structure and extends to the inner side of the filter box (13), the pull-out frame (14) is provided with an air avoidance groove (31) corresponding to the liquid discharge pipe (30), the liquid discharge pipe (30) is arranged in the air avoidance groove (31), and the bottom output end of the liquid discharge pipe (30) is arranged on the upper side of the guide groove (24).

8. The sludge drying waste heat utilization device according to claim 7, characterized in that: The first-stage waste heat utilization component (8) comprises a heat exchange tube (32) arranged in a spiral shape, the bottom input end of the heat exchange tube (32) is connected to the output end of the main pipe (25), and the output end of the heat exchange tube (32) is connected to the second-stage waste heat utilization component (9).

9. The sludge drying waste heat utilization device according to claim 8, characterized in that: The secondary waste heat utilization component (9) includes a diverter cover (33) and a merging cover (34) installed on the upper and lower sides of the secondary treatment chamber (7), the output end of the heat exchange tube (32) is arranged in the diverter cover (33), a diverter baffle (35) is installed on the top of the inner side of the diverter cover (33), the output end of the diverter baffle (35) is connected to a plurality of secondary heat exchange tubes (36), a fixed baffle (37) is installed on the other side of the plurality of secondary heat exchange tubes (36), the fixed baffle (37) is fixedly installed at the bottom of the merging cover (34), the water inlet pipe (10) and the water outlet pipe (11) are arranged between the diverter baffle (35) and the fixed baffle (37), and the top of the merging cover (34) is connected to the exhaust port (12).

10. The sludge drying waste heat utilization device according to claim 9, characterized in that: The processing box (4) is equipped with an exhaust chimney (38) at the exhaust port (12), and a protective cap (39) is installed on the top of the exhaust chimney (38).

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