Sludge drying circulation structure

Abstract

The utility model discloses a sludge drying circulation structure, and particularly relates to the field of sludge treatment, the sludge drying circulation structure comprises a bottom frame, a drying cylinder is arranged on the top surface of the bottom frame, a stirring shaft is arranged in the drying cylinder, a stirring rod is arranged on the stirring shaft, and a scraping plate I is fixedly arranged at the bottom end of the stirring shaft; a filter plate is arranged in the drying cylinder, and a heating strip is arranged on the inner wall of the bottom frame; a gas conveying pipe is arranged on the top surface of the bottom frame, two air channels are formed in the inner wall of the drying cylinder, and the gas conveying pipe is communicated with the air channels; the other ends of the air channels jointly penetrate through the inner wall of the drying cylinder, and a steam extraction fan is arranged at the penetrating position. Water contained in sludge in the drying cylinder enters the bottom frame through the filter plate, is heated into steam through the heating strips arranged on the inner wall of the bottom frame, enters the air flue from the air delivery pipe under the action of the steam extraction fan and is finally discharged out of the drying cylinder, the steam can heat the drying cylinder in the process of passing through the air flue, and the drying effect is improved. Therefore, water in the sludge in the drying cylinder is convenient to evaporate.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge drying circulation structure. Background Art

[0002] Sludge treatment refers to a series of processing operations on the sludge produced during sewage treatment to reduce its volume, stabilize its chemical composition, remove pathogens, and ultimately render it harmless. During the sludge treatment process, it needs to be dried to remove moisture from the sludge.

[0003] Sludge drying, also known as sludge dehydration, refers to the process of removing most of the water content from the sludge through filtration or evaporation. After the sludge is concentrated, physical methods are used to further reduce the water content of the sludge to facilitate the transportation, accumulation, utilization or further treatment of the sludge.

[0004] Existing equipment directly uses heating or filter pressing to remove moisture from the sludge during sludge drying. The removed moisture is directly collected for further processing. This treatment method makes it difficult to recycle the moisture in the sludge and dry the sludge using the moisture in the sludge.

[0005] Therefore, we made improvements and proposed a sludge drying circulation structure. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The utility model discloses a sludge drying circulation structure, comprising a bottom frame, the top surface of the bottom frame is connected with a drying cylinder, the inner top surface of the drying cylinder is rotatably provided with a stirring shaft, a plurality of stirring rods are provided on the stirring shaft, and a scraper is fixedly provided at the bottom end of the stirring shaft; a filter plate is fixedly provided in the drying cylinder, and the scraper is slidably provided on the surface of the filter plate;

[0008] Heating strips are evenly arranged on the inner wall of the bottom frame; a threaded rod is rotatably arranged inside the bottom frame, a slide plate is threadedly arranged on the threaded rod, and a scraper plate 2 is fixedly arranged at the bottom end of the slide plate, and the bottom end of the scraper plate 2 is attached to the inner bottom surface of the bottom frame; an air supply pipe is arranged on the top surface of the bottom frame, and two air ducts are symmetrically opened on the inner wall of the drying cylinder, and the air supply pipe is connected to the air duct; the other end of the air duct passes through the inner wall of the drying cylinder together, and a steam extraction fan is arranged at the penetration point.

[0009] As a preferred technical solution of the utility model, a stirring motor is fixedly arranged on the top surface of the drying cylinder, and the output end of the stirring motor is fixedly connected to the top end of the stirring shaft.

[0010] As a preferred technical solution of the utility model, a feed inlet is arranged at the top of the drying cylinder, a discharge port is arranged at the side of the drying cylinder, and the discharge port is located at the top of the filter plate.

[0011] As a preferred technical solution of the utility model, the surface of the bottom frame is an anti-scalding and heat-insulating layer, and the heating strip can heat to a temperature of - degrees Celsius.

[0012] As a preferred technical solution of the utility model, the threaded rod, the slide plate and the second scraper are all made of high temperature resistant materials, and a V-shaped opening is opened at one end of the second scraper.

[0013] As a preferred technical solution of the utility model, a discharge port is opened on one side of the bottom frame, and a forward and reverse motor is fixedly installed on the side of the bottom frame, and one end of the threaded rod rotates through the bottom frame and is fixedly connected to the output end of the forward and reverse motor.

[0014] As a preferred technical solution of the utility model, a control switch is installed on the front of the bottom frame, and the heating strip, the stirring motor, the forward and reverse motors and the steam extraction fan are all electrically connected to the control switch.

[0015] The beneficial effects of the utility model are:

[0016] In the utility model, the sludge in the drying cylinder is combined with the flocculant to perform agglomeration treatment under the action of the stirring shaft and the stirring rod, and in the process of mixing, the moisture contained in it will enter the bottom frame through the filter plate, be heated into steam by the heating strips arranged on the inner wall of the bottom frame, and enter the air duct from the air pipe under the action of the steam extraction fan, and finally be discharged from the outside of the drying cylinder. The steam can heat the drying cylinder in the process of passing through the air duct, thereby facilitating the evaporation of moisture in the sludge in the drying cylinder. This drying structure can realize the cyclic drying treatment of the sludge and can effectively utilize the moisture in the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of a sludge drying circulation structure of the utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of a sludge drying circulation structure of the utility model. Figure 2 ;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of a sludge drying circulation structure of the utility model. Figure 3 .

[0022] In the figure: 1. bottom frame; 2. drying cylinder; 3. stirring motor; 4. feeding port; 5. discharging port; 6. steam extraction fan; 7. air pipe; 8. control switch; 9. air duct; 10. stirring shaft; 11. stirring rod; 12. scraper 1; 13. filter plate; 14. heating strip; 15. threaded rod; 16. forward and reverse motor; 17. slide plate; 18. scraper 2; 19. discharging port. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0024] Example: Figures 1 to 4 As shown, the utility model is a sludge drying circulation structure, comprising a bottom frame 1, the top surface of the bottom frame 1 is connected with a drying barrel 2, the inner top surface of the drying barrel 2 is rotatably provided with a stirring shaft 10, a plurality of stirring rods 11 are provided on the stirring shaft 10, and a scraper 12 is fixedly provided at the bottom end of the stirring shaft 10; a stirring motor 3 is fixedly provided on the top surface of the drying barrel 2, and the output end of the stirring motor 3 is fixedly connected to the top end of the stirring shaft 10. When the stirring motor 3 is working, it can drive the stirring shaft 10 to rotate, and the stirring shaft 10 drives the stirring rods 11 and the scraper 12 thereon to rotate, so that the sludge and flocculant in the drying barrel 2 can be evenly mixed, so that the sludge agglomerates for the next step of treatment, a filter plate 13 is fixedly provided in the drying barrel 2, and the scraper 12 is slidably provided on the surface of the filter plate 13; the setting of the scraper 12 can scrape off the sludge adhering to the filter plate 13, so that the water in the sludge can better pass through the filter holes on the filter plate 13 into the bottom frame 1. The filter holes on the filter plate 13 have a relatively small aperture, allowing water droplets to pass through.

[0025] Heating strips 14 are evenly arranged on the inner wall of the bottom frame 1; when the moisture of the sludge enters the bottom frame 1, the heating strips 14 on the inner wall of the bottom frame 1 will be heated to generate water vapor in the moisture, and the inner wall of the drying cylinder 2 is heated by the heat of the water vapor. Although the water vapor will also directly enter the interior of the drying cylinder 2, due to the setting of the steam extraction fan 6, a very small amount of steam enters the drying cylinder 2, and the drying treatment of the sludge by the drying cylinder 2 is not the last step of the sludge drying treatment.

[0026] A threaded rod 15 is rotatably provided inside the bottom frame 1, a slide plate 17 is threadably provided on the threaded rod 15, and a scraper plate 18 is fixedly provided at the bottom end of the slide plate 17, and the bottom end of the scraper plate 18 is attached to the inner bottom surface of the bottom frame 1; a discharge port 19 is provided on one side of the bottom frame 1, and a forward and reverse motor 16 is fixedly provided on the side of the bottom frame 1, and one end of the threaded rod 15 rotates through the bottom frame 1 and is fixedly connected to the output end of the forward and reverse motor 16. When the moisture in the sludge passes through the filter plate 13, a small amount of sludge will also enter the bottom frame 1 and adhere to the inner bottom surface of the bottom frame 1, so it needs to be scraped off. Specifically, the forward and reverse motor 16 can be started to drive the threaded rod 15 to rotate, so that the slide plate 17 on the threaded rod 15 drives the scraper plate 18 to slide along the inner bottom surface of the bottom frame 1, so as to scrape the sludge on the inner bottom surface of the bottom frame 1 to the discharge port 19, so that the staff can collect and process it.

[0027] A removable sealing baffle (not shown in the figure) is provided at the discharge port 19 by means of existing technical means. During the sludge drying process, the sealing baffle blocks the discharge port 19 to prevent the discharge of moisture and water vapor. When the bottom frame 1 needs to be cleaned after drying, the sealing baffle can be removed.

[0028] The top surface of the bottom frame 1 is connected with an air delivery pipe 7, and the inner wall of the drying cylinder 2 is symmetrically provided with two air ducts 9, and the air delivery pipe 7 is connected with the air duct 9; the other end of the air duct 9 passes through the inner wall of the drying cylinder 2, and a steam extraction fan 6 is provided at the penetration point. Under the action of the steam extraction fan 6, a large amount of water vapor generated by the heating strip 14 will enter the air duct 9 through the air delivery pipe 7, and finally be discharged from the outside of the drying cylinder 2. When the water vapor enters the air duct 9, the inner wall of the drying cylinder 2 can be heated to accelerate the drying of the sludge in the drying cylinder 2.

[0029] The top of the drying cylinder 2 is provided with an inlet 4, and the side of the drying cylinder 2 is provided with a discharge port 5, and the discharge port 5 is located at the top of the filter plate 13. Flocculants and sludge to be treated can be added to the drying cylinder 2 through the inlet 4, and the discharge port 5 is convenient for discharging the sludge after drying treatment. A control valve (not shown in the figure) is provided in the discharge port 5, and the control valve is in an open state during discharge and in a closed state during drying treatment.

[0030] The surface of the bottom frame 1 is a heat-insulating layer, and the heating strip 14 can heat to a temperature of 100-150 degrees Celsius. The surface of the drying cylinder 2 is also provided with a heat-insulating layer, such as a heat-insulating plastic material. The heating strip 14 can heat the water to generate water vapor.

[0031] The threaded rod 15, the slide plate 17 and the scraper 18 are all made of high temperature resistant materials, and a V-shaped opening is provided at one end of the scraper 18. The design of the V-shaped opening enables the scraper 18 to better scrape the sludge on the inner bottom surface of the bottom frame 1.

[0032] A control switch 8 is installed on the front of the bottom frame 1, and the heating strip 14, the control valve, the stirring motor 3, the forward and reverse motor 16 and the steam extraction fan 6 are all electrically connected to the control switch 8. The operation of the heating strip 14, the control valve, the stirring motor 3, the forward and reverse motor 16 and the steam extraction fan 6 can be controlled by the control switch 8.

[0033] During operation, the sludge in the drying cylinder 2 is combined with the flocculant to undergo agglomeration treatment under the action of the stirring shaft 10 and the stirring rod 11, and in the process of mixing, the moisture contained therein will pass through the filter plate 13 and enter the bottom frame 1, and be heated into steam by the heating strips 14 arranged on the inner wall of the bottom frame 1, and enter the air duct 9 from the air pipe 7 under the action of the steam extraction fan 6, and finally be discharged from the outside of the drying cylinder 2. The steam can heat the drying cylinder 2 in the process of passing through the air duct 9, thereby facilitating the evaporation of moisture in the sludge in the drying cylinder 2. This drying structure can realize the cyclic drying treatment of the sludge and can effectively utilize the moisture in the sludge.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sludge drying circulation structure, comprising a bottom frame (1), the top surface of the bottom frame (1) being connected to a drying cylinder (2), characterized in that: A stirring shaft (10) is rotatably arranged on the inner top surface of the drying cylinder (2), a plurality of stirring rods (11) are arranged on the stirring shaft (10), and a scraper plate (12) is fixedly arranged at the bottom end of the stirring shaft (10); a filter plate (13) is fixedly arranged inside the drying cylinder (2), and the scraper plate (12) is slidably arranged on the surface of the filter plate (13); Heating strips (14) are evenly arranged on the inner wall of the bottom frame (1); a threaded rod (15) is rotatably arranged inside the bottom frame (1), a slide plate (17) is threadedly arranged on the threaded rod (15), and a scraper plate (18) is fixedly arranged at the bottom end of the slide plate (17), and the bottom end of the scraper plate (18) is attached to the inner bottom surface of the bottom frame (1); an air supply pipe (7) is arranged on the top surface of the bottom frame (1), and two air ducts (9) are symmetrically opened on the inner wall of the drying cylinder (2), and the air supply pipe (7) is connected to the air duct (9); the other end of the air duct (9) passes through the inner wall of the drying cylinder (2), and a steam extraction fan (6) is arranged at the penetration point.

2. A sludge drying circulation structure according to claim 1, characterized in that: A stirring motor (3) is fixedly arranged on the top surface of the drying cylinder (2), and the output end of the stirring motor (3) is fixedly connected to the top end of the stirring shaft (10).

3. A sludge drying circulation structure according to claim 1, characterized in that: The top of the drying cylinder (2) is provided with a material inlet (4), the side of the drying cylinder (2) is provided with a material discharge port (5), and the material discharge port (5) is located at the top of the filter plate (13).

4. A sludge drying circulation structure according to claim 1, characterized in that: The surface of the bottom frame (1) is an anti-scalding and heat-insulating layer, and the heating strip (14) can heat to a temperature of 100-150 degrees Celsius.

5. The sludge drying circulation structure according to claim 1 is characterized in that: The threaded rod (15), the slide plate (17) and the second scraper (18) are all made of high temperature resistant material, and one end of the second scraper (18) is provided with a V-shaped opening.

6. A sludge drying circulation structure according to claim 2, characterized in that: A discharge port (19) is provided on one side of the bottom frame (1), and a forward and reverse motor (16) is fixedly arranged on the side of the bottom frame (1), and one end of the threaded rod (15) rotates through the bottom frame (1) and is fixedly connected to the output end of the forward and reverse motor (16).

7. A sludge drying circulation structure according to claim 6, characterized in that: A control switch (8) is installed on the front of the bottom frame (1), and the heating strip (14), the stirring motor (3), the forward and reverse motor (16) and the steam extraction fan (6) are all electrically connected to the control switch (8).

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