Vertical multi-layer heating disc sludge drying machine

Abstract

The invention provides a vertical multilayer heating disc sludge drying machine, which comprises an outer cylinder, a main shaft heating disc assembly, a steam inlet assembly, a steam outlet assembly, a material distribution pipe assembly, a scraper assembly, a driver, a speed reducing mechanism and the like, the material distributing pipe assembly and the scraper assembly rotate at a lower rotating speed under the transmission of the driving machine and the speed reducing mechanism, and are respectively fixed on the two sides of the outer cylinder through connecting devices; the main shaft heating disc assembly comprises a main shaft, a core pipe, a shaft sleeve and a heating disc, the upper end and the lower end of the main shaft are provided with a steam inlet assembly and a steam outlet assembly respectively, the material distribution pipe assembly comprises a material distribution pipe, a material distribution pipe sleeve and a rotating handle, and the material distribution pipe is in clearance fit with the material distribution pipe sleeve. The scraper assembly comprises a plurality of scrapers, a scraper connecting shaft, a connector and a scraper support. The drying machine is small in occupied area, the water content is easy to control, sludge and the heating disc are not easy to adhere, and the efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge drying treatment and relates to a device for sludge drying, in particular to a vertical multi-layer heating disc sludge drying machine. Background Art

[0002] At present, the sludge drying equipment on the market mainly includes drum drying, paddle drying, fluidized bed drying, etc. The residence time between the particles of the drum drying material varies greatly, the moisture content of the mixed sludge is difficult to control, and the sludge is easy to stick to the lifting plate or the wall surface, which is difficult to fall off, making it impossible to further dry. Paddle drying has a large dead angle, which limits the effective volume of the dryer. There are also problems such as sludge sticking to the wall and short shaft life. Fluidized bed drying can cause short circuit of the material due to the high degree of mixing of particles in the bed, and there are problems such as back mixing and complex exhaust gas separation. The above-mentioned traditional dryers are prone to agglomeration when drying oily sludge, resulting in the inability to increase the load.

[0003] The vertical multi-layer heating disc sludge dryer can solve the problems existing in the above-mentioned drying equipment, such as oily sludge agglomeration, sludge adhesion and compaction, difficult to control moisture content, small effective volume, uneven drying, complex tail gas separation, and large footprint.

[0004] Patent CN204803212U discloses a sludge drying device and a disc dryer thereof. Through the provision of a heating disc and a vertical stirring mechanism, the dry and wet mixed sludge is remixed and dried under the heating of high-temperature steam in the disc and the action of a paddle. However, it is not clear how the sludge is quantitatively fed and how the wet sludge is spread on the heating disc. At the same time, there are problems such as agglomeration of oily sludge during the remixing process and uneven drying.

[0005] Patent CN217025735U discloses a vertical rotary copper-containing sludge drying device, which is in direct contact with high-temperature steam through the provision of multi-layer trays and a vertical stirring mechanism. The granular sludge is dried layer by layer under the action of stirring blades. The device has high requirements on the inlet sludge shape and dryness, has a narrow scope of application, and has low drying efficiency. Summary of the invention

[0006] In order to solve the technical problems existing in the prior art such as agglomeration of oily sludge, sludge adhesion and compaction, difficulty in controlling moisture content, uneven drying and low drying efficiency, the present invention provides a vertical multi-layer heating disc sludge dryer.

[0007] The present invention provides a vertical multi-layer heating disc sludge drying machine, comprising an outer cylinder, a main shaft heating disc assembly, a steam inlet assembly, a steam outlet assembly, a material distribution pipe assembly, a scraper assembly, a driving machine and a reduction mechanism and other components. The main shaft heating disc assembly is a whole, and is rotated at a relatively low speed under the drive of the driving machine and the reduction mechanism. The material distribution pipe assembly and the scraper assembly are respectively fixed on both sides of the outer cylinder through connecting devices; the main shaft heating disc assembly comprises a main shaft, a core tube, a shaft sleeve and a heating disc, and the upper and lower ends of the main shaft are respectively provided with a steam inlet assembly and a steam outlet assembly, a core tube is arranged inside the main shaft, and a plurality of shaft sleeves are arranged on the main shaft, and steam inlet holes, Exhaust hole and annular groove, steam enters the annular groove from the steam inlet hole and enters the heating plate flow channel, and is converted into steam condensate after heat exchange in the heating plate flow channel, and enters another annular groove from the exhaust hole and returns to the core tube; the distribution pipe assembly includes a distribution pipe, a distribution pipe sleeve and a rotating handle, the distribution pipe and the distribution pipe sleeve are clearance-matched, a plurality of discharge holes of equal width are opened on the distribution pipe sleeve, and a plurality of discharge holes of different widths are also opened on the distribution pipe, the distribution pipe sleeve is fixed, and the distribution pipe changes the overlap between the distribution pipe and the discharge holes of the distribution pipe sleeve under the action of the rotating handle, thereby controlling the sludge discharge amount of each discharge hole; the scraper assembly includes a plurality of scrapers, a scraper connecting shaft, a joint and a scraper support.

[0008] The sludge drying machine also includes a base, which is convenient for placement in a desired location; the driving machine and the reduction mechanism are a motor and a reduction box respectively.

[0009] The interior of the heating plate is a cavity structure, and a number of partitions are evenly and radially arranged between the upper and lower discs. These partitions divide the cavity inside the heating plate into a number of flow channels and also have the function of reinforcing ribs.

[0010] The main shaft rotates at a very low speed under the transmission of the driving machine and the reduction mechanism. The very low speed is generally 0.1-0.2 r / min.

[0011] The main shaft adopts a thick-walled tube, and a plurality of shaft sleeves are arranged on the main shaft, wherein the number of the shaft sleeves is 2 to 8.

[0012] The scraper is a plough-type scraper, including 5 to 7 scrapers.

[0013] The material distribution pipe sleeve adopts a jacket structure, and cooling water is passed through the interior to prevent the sludge from drying in the material distribution pipe and blocking the material distribution pipe, thereby affecting material discharge.

[0014] The connection between the scraper and the connecting shaft, and the connection between the connecting shaft and the joint are all fixed connections. After the joint drives the connecting shaft and the scraper to adjust the angle, it is fixed to the scraper support through a connecting device with the connecting piece. The scraper support also has the function of supporting the fabric pipe assembly.

[0015] The fixed connection between the scraper and the connecting shaft is welding, the fixed connection between the connecting shaft and the joint is fixed by a cylindrical pin, and the connecting piece and the connecting device are nuts and threads.

[0016] A spring hole is provided on the upper part of the connecting shaft, and a spring is fixed inside the joint. The diameter of the spring hole matches the outer diameter of the spring. The upper part of the connecting shaft is inserted into the joint, and the scraper is tightly fitted to the upper surface of the heating plate through the spring force.

[0017] The dryer can improve the sludge processing capacity of the dryer by increasing the number of layers of the heating plate, the length of the main shaft, the number of the scraper assemblies and the distribution pipe assemblies.

[0018] When working, the sludge pump starts, and the sludge is evenly spread on the heating plate through the distribution pipe. The discharge amount of the sludge is controlled by adjusting the frequency conversion of the pump and the size of the discharge port. Then the steam is passed into the heating plate, and after heating, it is condensed into water and discharged through the steam trap. The tail gas fan discharges the evaporated gas in the drying barrel in time. Cooling water is passed through the water jacket of the distribution pipe to prevent the sludge from drying and clogging in the pipe.

[0019] The sludge drying device can control the steam flow rate to ensure that the steam undergoes phase change in the heating plate, and utilizes the latent heat of phase change to release a large amount of heat to dry the sludge.

[0020] In one rotation cycle, the sludge on the upper surface of the disc is heated and dried, then moves from the inside of the disc to the gap between the outside of the disc and the outer cylinder through the multi-stage scraper and falls to the bottom of the disc. The sweeping plate at the bottom of the disc sweeps the material out from the discharge port after one rotation cycle.

[0021] The present invention has the following beneficial effects:

[0022] 1) The vertical multi-layer heating disc sludge dryer of the present invention increases the processing capacity of the dryer by increasing the number of layers of the heating discs, thereby greatly reducing the floor space occupied;

[0023] 2) The speed of the dryer is very low, about 0.125r / min, which does not require high bearings and seals, thus increasing the service life of the equipment;

[0024] 3) The steam external interface is one in and one out, which greatly reduces the number of steam pipes on the multi-layer heating plate;

[0025] 4) The scraper is tightly attached to the upper surface of the heating plate by the spring force, and the sludge is rolled to the edge of the heating plate by the multi-stage scraper to avoid the adhesion and compaction of the sludge and the heating plate;

[0026] 5) By controlling the opening of the steam inlet regulating valve, the steam flow rate is adjusted to ensure that the steam undergoes phase change in the heating plate to release a large amount of heat, thereby reducing steam consumption;

[0027] 6) Use frequency conversion to control the feed amount of sludge, coordinate the size of the feed opening of the distribution pipe assembly to control the thickness of the sludge auxiliary material, and accurately control the moisture content of the sludge after drying;

[0028] 7) The evaporated mixed exhaust gas in the dryer is discharged in time through the exhaust fan, so that the inside of the dryer is in a slightly negative pressure, ensuring the temperature difference between the upper and lower surfaces of the sludge, thereby accelerating the drying rate of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the heating plate of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the material distribution pipe assembly of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the scraper assembly of the present invention;

[0033] Figure 5 for Figure 4 Side view of

[0034] Figure 6 It is a schematic diagram of the process of the present invention.

[0035] In the figure: 1-base, 2-outer cylinder, 3-side sealing plate, 4-distribution pipe assembly, 5-top cover, 6-packing, 7-packing gland, 8-stud, 9-nut, 10-transition flange, 11-steam inlet assembly, 12-stud, 13-nut, 14-spindle heating plate assembly, 15-exhaust port flange, 16-scraper assembly, 17-sweeping plate, 18-discharge port assembly, 19-reduction box, 20-rotary seal, 21-steam outlet assembly, 22-motor, 401-cooling jacket, 402- Distribution pipe sleeve, 403-distribution pipe, 404-feeding hole, 405-rotating handle, 141-spindle, 142-heating plate, 143-core tube, 144-steam inlet, 145-steam exhaust hole, 146-steam flow channel inlet of heating plate, 147-steam flow channel outlet of heating plate, 148-heating plate flow channel baffle, 149-annular groove, 150-sleeve, 161-nut, 162-scraper joint, 163-scraper connecting shaft, 164-scraper, 165-scraper support, 166-spring. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings.

[0037] like Figures 1 to 5As shown, a vertical multi-layer heating disc sludge dryer of the present invention mainly includes a main shaft heating disc assembly 14, a material distribution pipe assembly 4, and a scraper assembly 16. The steam inlet assembly 11 and the steam outlet assembly 21 are connected to the main shaft heating disc assembly 14 through a rotary seal 20; the material distribution pipe assembly 4 and the scraper assembly 16 are connected to the outer cylinder 2 through a side sealing plate 3 by bolts; the steam inlet assembly 11 is welded to the transition flange 10 as a whole, and is fixed to the top cover 5 through a stud 8 and a nut 9; the packing gland 7 tightly fits the packing 6 to the main shaft heating disc assembly 14 through a stud 12 and a nut 13 to prevent the volatile gas in the dryer from leaking from the gap between the main shaft heating disc assembly 14 and the top cover 5. The exhaust port flange 15 is welded to the top cover 5 as a whole, and the volatile gas is discharged through an external induced draft fan. The sweeping plate 17 is welded to the bottommost heating disc as a whole, and the falling material on the heating disc is discharged from the discharge port assembly 18. The discharge port assembly 18 is welded to the outer cylinder 2 as a whole and contains a cooling water jacket to reduce the discharge temperature.

[0038] like Figure 1 As shown, steam enters the spindle heating disk assembly 14 through the steam inlet assembly 11, and the spindle 141 and the heating disk 142 are designed with steam inlets and exhaust ports and steam flow channels. After sufficient heat exchange, the steam is discharged from the steam outlet assembly 21 in the form of condensed water. A rotating mechanical seal 20 is designed between the steam inlet assembly 11, the steam outlet assembly 21 and the spindle heating disk assembly 14 to prevent steam from leaking into the atmosphere.

[0039] like Figure 1 As shown, the motor 22 drives the spindle heating disc assembly 14 to rotate slowly through the reduction box 19, and the material distribution pipe assembly 4 and the scraper assembly 16 are both fixed. In one rotation cycle, the sludge on the upper surface of the heating disc 142 is heated and dried, and then moves from the inner side of the heating disc 142 to the gap between the outer side of the heating disc 142 and the outer cylinder 2 through the multi-stage scraper 164 and falls to the bottom of the disc. The sweeping plate 17 at the bottom of the disc sweeps the material out from the discharge port assembly 18 after one rotation cycle.

[0040] like Figure 1 As shown, the distribution pipe assembly 4 is connected to the outer cylinder 2 by bolts through the side sealing plate 3. The distribution pipe 403 and the distribution pipe sleeve 402 are clearance-matched. The distribution pipe sleeve 402 is provided with a plurality of discharge holes 404 of equal width, and the distribution pipe 403 is provided with a plurality of discharge holes 404 of different widths. The distribution pipe sleeve 402 is fixed, and the distribution pipe 403 changes the overlap between the distribution pipe 403 and each discharge hole 404 of the distribution pipe sleeve 402 under the action of the rotating handle 405, thereby controlling the sludge discharge amount of each discharge hole 404. The distribution pipe sleeve 402 adopts a jacket structure 401, and cooling water is passed inside to prevent the sludge from drying in the distribution pipe and blocking the distribution pipe, thereby affecting the discharge.

[0041] like Figure 1As shown, the scraper assembly 16 is composed of a plurality of scrapers 164, a plurality of scraper connecting shafts 163, a scraper joint 162, and a scraper support 165. The scraper 164 is a plow-type scraper, and the scraper 164 is welded to the scraper connecting shaft 163. The scraper connecting shaft 163 and the scraper joint 162 are fixed by cylindrical pins. After the scraper joint 162 drives the scraper connecting shaft 163 and the scraper 164 to adjust the angle, it is fixed to the scraper support 165 through a threaded connection with the nut 161. The scraper support 165 also has the function of supporting the material distribution tube assembly 4. A spring hole is opened on the upper part of the scraper connecting shaft 163, and a spring is fixed inside the scraper joint 162. The diameter of the spring hole matches the outer diameter of the spring. The upper part of the scraper connecting shaft 163 is inserted into the scraper joint 162, and the scraper 164 is tightly fitted to the upper surface of the heating plate 162 by the spring force.

[0042] The above description is only a typical embodiment of the present invention, and does not impose any form of limitation on the present invention. Any changes or modifications made by any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, using the above content should be regarded as equivalent examples of equivalent changes. Any equivalent changes made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A vertical multi-layer heating disc sludge drying machine, characterized by: The dryer comprises an outer cylinder, a main shaft heating plate assembly, a steam inlet assembly, a steam outlet assembly, a distribution pipe assembly, a scraper assembly, a driving machine and a reduction mechanism. The main shaft heating plate assembly is a whole, and rotates at a relatively low speed under the drive of the driving machine and the reduction mechanism. The distribution pipe assembly and the scraper assembly are respectively fixed on both sides of the outer cylinder through connecting devices; the main shaft heating plate assembly comprises a main shaft, a core tube, a sleeve and a heating plate. The upper and lower ends of the main shaft are respectively provided with a steam inlet assembly and a steam outlet assembly. A core tube is arranged inside the main shaft, and a plurality of sleeves are arranged on the main shaft. The sleeves are provided with steam inlet holes, steam exhaust holes and annular grooves; the distribution pipe assembly comprises a distribution pipe, a distribution pipe sleeve and a rotating handle. The distribution pipe and the distribution pipe sleeve are clearance-matched. A plurality of feeding holes of equal width are opened on the distribution pipe sleeve, and a plurality of feeding holes of different widths are also opened on the distribution pipe; the scraper assembly comprises a plurality of scrapers, a scraper connecting shaft, a joint and a scraper support.

2. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The sludge drying machine also includes a base; the driving machine and the reduction mechanism are a motor and a reduction box respectively.

3. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The interior of the heating plate is a cavity structure, and a number of partitions are evenly and radially arranged between the upper and lower discs. These partitions divide the cavity inside the heating plate into a number of flow channels and also have the function of reinforcing ribs.

4. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The main shaft rotates at a very low speed under the transmission of the driving machine and the reduction mechanism. The very low speed is 0.1-0.2 r / min.

5. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The main shaft adopts a thick-walled tube, and a plurality of shaft sleeves are arranged on the main shaft, wherein the plurality of shaft sleeves is 2 to 8.

6. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The scraper is a plough-type scraper, including 5 to 7 scrapers.

7. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The material distribution pipe sleeve adopts a jacket structure, and cooling water is passed through the interior to prevent the sludge from drying in the material distribution pipe and blocking the material distribution pipe.

8. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: The connection between the scraper and the connecting shaft, and the connection between the connecting shaft and the joint are all fixed connections. After the joint drives the connecting shaft and the scraper to adjust the angle, it is fixed to the scraper support through a connecting device with the connecting piece. The scraper support also has the function of supporting the fabric pipe assembly.

9. The vertical multi-layer heating disc sludge drying machine according to claim 8 is characterized by: The fixed connection between the scraper and the connecting shaft is welding, the fixed connection between the connecting shaft and the joint is fixed by a cylindrical pin, and the connecting piece and the connecting device are nuts and threads.

10. The vertical multi-layer heating disc sludge drying machine according to claim 1 is characterized by: A spring hole is provided on the upper part of the connecting shaft, and a spring is fixed inside the joint. The diameter of the spring hole matches the outer diameter of the spring. The upper part of the connecting shaft is inserted into the joint, and the scraper is tightly fitted to the upper surface of the heating plate through the spring force.

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