Vertical multi-layer heating disc sludge drier

Abstract

The application provides a vertical multi-layer heating disc sludge drier, which comprises an outer cylinder, a main shaft heating disc assembly, a steam inlet assembly, a steam outlet assembly, a material pipe assembly, a scraper assembly, a driving machine and a speed reduction mechanism, the main shaft heating disc assembly is an integral whole, rotates at a low speed under the transmission of the driving machine and the speed reduction mechanism, the material pipe assembly and the scraper assembly are fixed on the two sides of the outer cylinder through connecting devices respectively, the main shaft heating disc assembly comprises a main shaft, a core pipe, a shaft sleeve and a heating disc, the upper and lower ends of the main shaft are respectively provided with the steam inlet assembly and the steam outlet assembly, the material pipe assembly comprises a material pipe, a material pipe sleeve and a rotating handle, the material pipe and the material pipe sleeve are in gap fit, and the scraper assembly comprises a plurality of scraper blades, a scraper connecting shaft, a joint and a scraper support. The drier has a small floor space, a good water content control, a low sludge and heating disc adhesion and a high efficiency.

Description

TECHNICAL FIELD

[0001] The present application 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

[0002] At present, the sludge drying equipment on the market mainly includes rotary drum drying, paddle drying, fluidized bed drying and the like. The residence time of material particles in the rotary drum drying is greatly different, the moisture content of mixed sludge is not easy to control, and the sludge is easy to stick to the scoop or wall, and it is difficult to fall off, so that the drying cannot be further carried out. The paddle drying has a large dead angle, which limits the effective volume of the dryer, and at the same time, there are problems such as sludge sticking to the wall and short service life of the rotating shaft. The fluidized bed drying can cause short circuit of the material due to high mixing of particles in the bed, and there are problems such as back mixing and complex tail gas separation. When the above-mentioned traditional drying machines dry the oily sludge, the oily sludge is easy to form a ball, which causes the load to be unable to be improved.

[0003] The vertical multi-layer heating disc sludge drying machine can solve the problems of oily sludge balling, sludge sticking and hardening, difficult control of moisture content, small effective volume, uneven drying, complex tail gas separation and large occupied area existing in the above-mentioned drying equipment.

[0004] Patent CN204803212U discloses a sludge drying device and a disc dryer thereof, which performs back mixing and drying on dry-wet mixed sludge under the action of high-temperature steam heating and a poking piece in the disc through the setting of a heating disc and a vertical stirring mechanism, but does not clearly show how the sludge is quantitatively discharged and how the wet sludge is laid on the heating disc, and at the same time, there are problems such as oily sludge balling in the back mixing process and uneven drying.

[0005] Patent CN217025735U discloses a vertical rotary disc copper-containing sludge drying device, which directly contacts with high-temperature steam through the setting of a multi-layer tray and a vertical stirring mechanism, and makes the granular sludge dry layer by layer under the action of stirring blades, the device has high requirements for the shape and dryness of the inlet sludge, has a narrow application range and low drying efficiency. SUMMARY

[0006] In order to solve the technical problems of oily sludge balling, sludge sticking and hardening, difficult control of moisture content, uneven drying and low drying efficiency existing in the prior art, the present application provides a vertical multi-layer heating disc sludge drying machine.

[0007] The application provides a vertical multi-layer heating disc sludge drier, which comprises an outer cylinder, a main shaft heating disc assembly, a steam inlet assembly, a steam outlet assembly, a distributing pipe assembly, a scraper assembly, a driving machine and a speed reduction mechanism and the like components, the main shaft heating disc assembly is an entirety, rotates at a low speed under the transmission of the driving machine and the speed reduction mechanism, the distributing 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 pipe, a shaft sleeve and a heating disc, the upper and lower ends of the main shaft are respectively provided with the steam inlet assembly and the steam outlet assembly, the core pipe is arranged in the main shaft, a plurality of shaft sleeves are arranged on the main shaft, steam enters an annular groove through steam inlets, enters the heating disc flow channel, is converted into steam condensate after heat exchange in the heating disc flow channel, enters another annular groove from the steam outlet and returns to the core pipe, the distributing pipe assembly comprises a distributing pipe, a distributing pipe sleeve and a rotating handle, the distributing pipe and the distributing pipe sleeve are in gap fit, a plurality of equal-width discharging holes are arranged on the distributing pipe sleeve, a plurality of discharging holes with different widths are arranged on the distributing pipe, the distributing pipe sleeve is fixed, and the distributing pipe changes the overlapping degree of the discharging holes of the distributing pipe and the distributing pipe sleeve under the action of the rotating handle, so that the sludge discharging amount of each discharging hole is controlled, and the scraper assembly comprises a plurality of scraper blades, a scraper connecting shaft, a joint and a scraper support.

[0008] The sludge drier further comprises a base, which is convenient to arrange in a required place, and the driving machine and the speed reduction mechanism are respectively a motor and a speed reduction box.

[0009] The heating disc is internally hollow, a plurality of partitions are uniformly and radially arranged between upper and lower discs, the partitions divide the internal cavity of the heating disc into a plurality of flow channels, and simultaneously 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 speed reduction mechanism, and the very low speed is generally 0.1-0.2 r / min.

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

[0012] The scraper adopts a plow-type scraper, and comprises 5-7 scraper blades.

[0013] The distributing pipe sleeve adopts a jacket structure, and cooling water is circulated in the jacket structure, so that the sludge is prevented from drying in the distributing pipe and blocking the distributing pipe and affecting discharging.

[0014] The connection between the scraper and the connecting shaft and the connection between the connecting shaft and the joint all adopt fixed connection, the joint drives the connecting shaft and the scraper to be adjusted to a proper angle, and then the connecting member is fixed on the scraper support through the connecting device, and the scraper support simultaneously has the function of supporting the distributing pipe assembly.

[0015] The fixed connection of the scraper with the connecting shaft is welding, the fixed connection of the connecting shaft with the joint adopts cylindrical pin fixing, and the connecting piece and the connecting device are nut and thread.

[0016] A spring hole is arranged on the upper portion of the connecting shaft, and a spring is fixed in the joint, the diameter of the spring hole matches the outer diameter of the spring, the upper portion of the connecting shaft is inserted into the joint, and the scraper is tightly attached to the upper surface of the heating disc through the spring force.

[0017] The drying machine can improve the sludge treatment capacity of the drying machine by increasing the number of layers of the heating disc, the length of the main shaft, the number of scraper assemblies and the number of distribution pipes.

[0018] During operation, the sludge pump is started, the sludge is evenly laid on the heating disc through the distribution pipe, the discharge amount of the sludge is controlled through frequency adjustment of the pump and size adjustment of the discharge port, then steam is introduced into the heating disc, and after heating, the steam is condensed into water through a drain valve and discharged, and the tail gas fan timely discharges the evaporated gas in the drying machine cylinder.

[0019] The sludge drying device can control the steam flow to ensure that the steam undergoes phase change in the heating disc and releases a large amount of heat through latent heat of phase change, so that the sludge is dried.

[0020] During one rotation period, the sludge on the upper surface of the disc is dried by heating, and then moves to the gap between the disc and the outer cylinder through the multi-stage scraper in the disc, and then falls to the bottom of the disc, and the sweep plate at the bottom of the disc sweeps the material out of the discharge port after one rotation period.

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

[0022] 1) The vertical multi-layer heating disc sludge drying machine can improve the treatment capacity of the drying machine by increasing the number of layers of the heating disc, and greatly reduces the floor area;

[0023] 2) The rotating speed of the drying machine is very low, about 0.125r / min, the requirement for bearings and seals is not high, and the service life of the equipment is improved;

[0024] 3) The steam external interface is one inlet and one outlet, which greatly reduces the number of steam pipelines of the multi-layer heating disc;

[0025] 4) The scraper is tightly attached to the upper surface of the heating disc under the action of the spring force, the sludge moves to the edge of the heating disc through the rolling of the multi-stage scraper, and the adhesion and hardening of the sludge and the heating disc are avoided;

[0026] 5) The opening of the steam inlet regulating valve is controlled to adjust the steam flow, so that the steam undergoes phase change in the heating disc to release a large amount of heat, and the steam consumption is reduced;

[0027] 6) Adopt variable frequency mode to control the feeding amount of sludge, cooperate with the size of the discharge port of the distribution pipe assembly to control the auxiliary material thickness of sludge, and accurately control the moisture content of dried sludge;

[0028] 7) The mixed exhaust gas evaporated in the dryer is discharged in time by the exhaust fan, so that the inside of the dryer is in micro negative pressure, the temperature difference between the upper and lower surfaces of the sludge is ensured, and the drying rate of the sludge is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present application;

[0030] Figure 2 It is a structural schematic diagram of the heating disc of the present application;

[0031] Figure 3 It is a structural schematic diagram of the distribution pipe assembly of the present application;

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

[0033] Figure 5 It is a side view of Figure 4 ;

[0034] Figure 6 It is a flow chart of the present application.

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

[0036] The present application will be further described below in combination with the drawings.

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

[0038] As shown, Figure 1 The steam enters the main shaft heating disc assembly 14 through the steam inlet assembly 11, and the main shaft 141 and the heating disc 142 are designed with steam inlet 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, and the rotary mechanical seal 20 is designed between the steam inlet assembly 11, the steam outlet assembly 21 and the main shaft heating disc assembly 14 to prevent the leakage of steam into the atmosphere.

[0039] As shown, Figure 1 The motor 22 drives the main shaft heating disc assembly 14 to rotate slowly through the speed reducer 19, and the distributing pipe assembly 4 and the scraper assembly 16 are fixed. During one rotation period, the sludge on the upper surface of the heating disc 142 is dried and heated, and then moves from the inside of the heating disc 142 to the outside of the heating disc 142 through multiple scrapers 164 to fall into the gap between the heating disc 142 and the outer cylinder 2, and the sweep plate 17 at the bottom of the disc sweeps the material out of the discharge port assembly 18 after one rotation period.

[0040] As shown, Figure 1 The distributing pipe assembly 4 is bolted with the outer cylinder 2 through the side sealing plate 3. The distributing pipe 403 is gap-fitted with the distributing pipe sleeve 402. A plurality of discharge holes 404 of equal width are opened on the distributing pipe sleeve 402, and a plurality of discharge holes 404 of different widths are opened on the distributing pipe 403. The distributing pipe sleeve 402 is fixed, and the distributing pipe 403 changes the overlapping degree of the discharge holes 404 of the distributing pipe 403 and the distributing pipe sleeve 402 under the action of the rotating handle 405, so as to control the sludge discharge amount of each discharge hole 404. The distributing pipe sleeve 402 adopts a jacket structure 401, and cooling water is circulated in the inside to avoid the blockage of the distributing pipe due to the drying of the sludge in the distributing pipe, which affects the discharge.

[0041] As shown, Figure 1As shown, the scraper assembly 16 is composed of a plurality of scraper blades 164, a plurality of scraper connecting shafts 163, scraper joints 162, and scraper supports 165. The scraper blades 164 are plow-shaped, and the scraper blades 164 are welded to the scraper connecting shafts 163, which are fixed to the scraper joints 162 by cylindrical pins. After the scraper joints 162 drive the scraper connecting shafts 163 and the scraper blades 164 to be adjusted to the proper angle, the scraper joints 162 are fixed to the scraper supports 165 by threaded connection with the nuts 161. The scraper supports 165 also support the fabric tube assembly 4. The scraper connecting shafts 163 have spring holes in the upper portions, and the scraper joints 162 have springs fixed inside. The diameters of the spring holes match the outer diameters of the springs, and the upper portions of the scraper connecting shafts 163 are inserted into the inside of the scraper joints 162, so that the scraper blades 164 are tightly attached to the upper surfaces of the heating discs 162 by the spring force.

[0042] The above description is only typical embodiments of the present application, and does not limit the present application in any form. Any modification or change made by those skilled in the art based on the above description without departing from the technical solution of the present application shall be regarded as equivalent examples. Any equivalent change made to the above embodiments based on the technical essence of the present application without departing from the technical solution of the present application shall be regarded as within the scope of the present application.

Claims

1. A vertical multi-layer heating disc sludge dryer, characterized in that: The drying machine comprises an outer cylinder, a main shaft heating disc assembly, a steam inlet assembly, a steam outlet assembly, a cloth pipe assembly, a scraper assembly, a driving machine and a speed reduction mechanism, the main shaft heating disc assembly is an integral whole, rotates at a low speed under the transmission of the driving machine and the speed reduction mechanism, and the cloth 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 pipe, a shaft sleeve and a heating disc, the upper and lower ends of the main shaft are respectively provided with the steam inlet assembly and the steam outlet assembly, the core pipe is arranged in the main shaft, a plurality of shaft sleeves are arranged on the main shaft, steam inlet holes, steam outlet holes and annular grooves are arranged on the shaft sleeves; the cloth pipe assembly comprises a cloth pipe, a cloth pipe sleeve and a rotating handle, the cloth pipe and the cloth pipe sleeve are in gap fit, a plurality of equal-width discharge holes are arranged on the cloth pipe sleeve, a plurality of discharge holes with different widths are arranged on the cloth pipe, and the cloth pipe sleeve adopts a jacket structure and is internally provided with cooling water to prevent the sludge from being dried in the cloth pipe and blocking the cloth pipe; the scraper assembly comprises a plurality of scraper blades, a scraper connecting shaft, a joint and a scraper support.

2. The vertical multi-heating stage drying disc sludge drier according to claim 1, characterized in that: The sludge drying machine further comprises a base, and the driving machine and the speed reduction mechanism are respectively a motor and a speed reduction box.

3. The vertical multi-heating stage drying disc sludge drier according to claim 1, characterized in that: The heating disc is internally provided with a cavity structure, and a plurality of partitions are uniformly and radially arranged between the upper and lower discs, the partitions divide the cavity of the heating disc into a plurality of flow channels and simultaneously have the function of reinforcing ribs.

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

5. The vertical multi-heating stage drying disc sludge drier according to claim 1, characterized in that: The main shaft adopts a thick-walled pipe, and a plurality of shaft sleeves are arranged on the main shaft, and the number of the shaft sleeves is 2-8.

6. The vertical multi-heating stage drying disc sludge drier according to claim 1, characterized in that: The scraper adopts a plow-shaped scraper and comprises 5-7 scraper blades.

7. The vertical multi-heating stage drying disc sludge drier according to claim 1, characterized in that: The connection between the scraper and the connecting shaft, the connection between the connecting shaft and the joint and the connection between the connecting piece and the connecting device are all fixed connections, the joint drives the connecting shaft and the scraper to adjust the angle, the connecting piece is fixed on the scraper support through the connecting device after the angle is adjusted, and the scraper support also has the function of supporting the cloth pipe assembly.

8. The vertical multi-heating stage disc sludge dryer according to claim 7, characterized in that: The fixed connection between the scraper and the connecting shaft is welding, the fixed connection between the connecting shaft and the joint adopts cylindrical pin fixing, and the connecting piece and the connecting device are a nut and a thread.

9. The vertical multi-heating stage disc sludge dryer according to claim 1, characterized in that: A spring hole is arranged on the upper portion of the connecting shaft, a spring is fixed in the joint, the diameter of the spring hole matches the outer diameter of the spring, the upper portion of the connecting shaft is inserted into the joint, and the scraper is tightly attached to the upper surface of the heating disc through the spring force.

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