A sludge low-temperature drying device

Abstract

The present application relates to the technical field of sludge drying, and discloses a sludge low-temperature drying device, which comprises a pretreatment box and a drying box, a conveying mechanism, an air supply mechanism and a dehumidification mechanism are arranged in the drying box, the drying box comprises a feeding port and a discharging port, the conveying mechanism is used for conveying sludge at the feeding port end to the discharging port end, the conveying mechanism comprises a conveying belt, a first material guide and a second material guide, the conveying belt comprises a first conveying section and a second conveying section, the first conveying section is located below the feeding port, the first material guide is arranged on the first conveying section and is used for guiding sludge on the first conveying section to the second conveying section, and the second material guide is arranged on the second conveying section and is used for guiding sludge on the second conveying section to the discharging port. The present application is used for solving the problem that in the prior art, a plurality of conveying belts need to be arranged in the drying box so as to cooperate with the overturning mechanism to overturn the sludge, and the cost is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge drying, in particular to a sludge low-temperature drying device. BACKGROUND

[0002] Sludge low-temperature drying is a method of removing water from sludge through low-temperature treatment. This treatment method uses relatively low temperatures, usually between 60°C and 120°C, to reduce energy consumption and environmental impact. The process of sludge low-temperature drying mainly includes pretreatment, drying and dewatering steps.

[0003] As disclosed in a filter type sludge low-temperature drying device capable of turning over sludge of Chinese patent

publication number: CN115259599A

[0004] However, this patent needs to set multiple groups of conveying belts in the drying box to cooperate with the turning mechanism to turn over the sludge, which is high in cost. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a sludge low-temperature drying device to solve the problem in the prior art that multiple groups of conveying belts need to be set in the drying box to cooperate with the turning mechanism to turn over the sludge, which is high in cost.

[0006] The present application solves the above technical problems through the following technical means:

[0007] A sludge low-temperature drying device, comprising a pretreatment box and a drying box, wherein the drying box is provided with a conveying mechanism, an air supply mechanism and a dehumidification mechanism, the drying box comprises a feeding port and a discharging port, the conveying mechanism is used to convey the sludge at the feeding port end to the discharging port end, the conveying mechanism comprises a conveying belt, a first material guide and a second material guide, the conveying belt comprises a first conveying section and a second conveying section, the first conveying section is located below the feeding port, the first material guide is arranged on the first conveying section and used to guide the sludge on the first conveying section to the second conveying section, and the second material guide is arranged on the second conveying section and used to guide the sludge on the second conveying section to the discharging port.

[0008] Further, the first material guide and the second material guide are structurally identical, the first material guide comprises a material guide box and a material guide plate, the material guide box is fixedly connected with the drying box, the material guide box is provided with a material receiving port and a material discharging port, the material guide plate is arranged above the conveying belt, the material guide plate is provided with an inclined surface, the inclined surface is used for guiding the sludge in the first conveying section into the material receiving port, and the material discharging port is located above the second conveying section.

[0009] Further, the inclined surface is provided with two inclined surfaces, the two inclined surfaces are symmetrically arranged, and guide inclined surfaces are arranged on both sides in the material guide box.

[0010] Further, the drying box comprises an upper box body and a lower box body, the lower box body is provided with a first mounting groove, the conveying belt is mounted in the first mounting groove, the upper box body is sealingly connected to the lower box body, the upper box body and the conveying belt form a first channel, the first conveying section is located in the first channel, the lower box body and the conveying belt form a second channel, the second conveying section is located in the second channel, and the first channel is communicated with the second channel through the first material guide.

[0011] Further, one end of the first mounting groove is provided with a second mounting groove, the other end is provided with a third mounting groove, the first material guide is mounted in the second mounting groove, and the second material guide is mounted in the third mounting groove.

[0012] Further, the material inlet is arranged at one end of the top of the upper box body, the material outlet is arranged at one end of the bottom of the lower box body, one end of the lower box body close to the material outlet is provided with an air inlet, the air supply mechanism is communicated with the air inlet, one end of the upper box body close to the material inlet is provided with an air outlet, the dehumidifying mechanism is communicated with the air outlet, and the airflow blown out by the air supply mechanism enters the dehumidifying mechanism in sequence through the air inlet, the first channel, the first material guide and the second channel.

[0013] Further, the air supply mechanism comprises a warm air blower and an air supply pipe, the warm air blower is fixedly installed on the lower box body, one end of the air supply pipe is communicated with the warm air blower, and the other end is communicated with the air inlet.

[0014] Further, the dehumidifying mechanism comprises a dehumidifier, the dehumidifier is fixedly connected with the upper box body, the dehumidifier is communicated with the air outlet, the bottom of the dehumidifier is provided with a drain pipe, and the top of the dehumidifier is provided with an exhaust pipe.

[0015] Further, the side wall of the first mounting groove is abutted with the second conveying section, the ventilation cavities are arranged in the two side walls of the first mounting groove, the air inlet is communicated with the ventilation cavities through a connecting pipeline, a plurality of ventilation grooves are arranged on the two side walls of the first mounting groove, and the ventilation grooves are communicated with the second channel.

[0016] Further, the first channel and the second channel are provided with a material turning assembly, the material turning assembly comprises a material turning support and a plurality of material turning rods, the material turning support is fixedly connected with the drying box, and the plurality of material turning rods are fixedly connected with the material turning support.

[0017] Effects of the present application:

[0018] 1. By dividing the conveying belt into a first conveying section and a second conveying section, and cooperating the first material guide and the second material guide, the first material guide guides the sludge on the first conveying section to the second conveying section, so that the sludge is turned over, and a plurality of conveying belts are not additionally arranged, thereby effectively reducing the cost.

[0019] 2. By arranging the upper box and the lower box, the upper box and the conveying belt form a first channel, the lower box and the conveying belt form a second channel, the first channel is communicated with the second channel through the first material guide, and the hot air flow blown by the air feeding mechanism enters the dehumidifying mechanism through the air inlet, the first channel, the first material guide and the second channel in sequence, so that the sludge on the first conveying section and the second conveying section is dried.

[0020] 3. By arranging the material turning assembly in the first channel and the second channel, when the conveying belt conveys the sludge, the material turning assembly can turn over the sludge on the conveying belt, so that the sludge can be uniformly dried, and the drying effect of the sludge is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of a sludge low-temperature drying device;

[0022] Figure 2 is a sectional structural schematic view of a sludge low-temperature drying device;

[0023] Figure 3 is a structural schematic view of a lower box in a sludge low-temperature drying device;

[0024] Figure 4 is a structural schematic view of a conveying mechanism in a sludge low-temperature drying device;

[0025] Figure 5 is a structural schematic view of a first material guide in a sludge low-temperature drying device;

[0026] Figure 6 is a structural schematic view of a material turning mechanism in a sludge low-temperature drying device;

[0027] Among them,

[0028] 1, the upper box; 11, the feed inlet; 12, the air outlet;

[0029] 2, lower box; 21, discharge port; 22, support leg; 23, first mounting groove; 231, ventilation cavity; 232, ventilation groove; 24, second mounting groove; 25, third mounting groove; 26, air inlet; 261, connecting pipeline;

[0030] 31, conveying belt; 311, first conveying section; 312, second conveying section; 32, first material guide; 321, material guide box; 322, material guide plate; 323, material receiving port; 324, material discharging port; 325, inclined surface; 33, second material guide; 341, driving roller; 342, driven roller; 35, driving motor;

[0031] 41, air heater; 42, air supply pipe;

[0032] 5, dehumidifier; 51, liquid discharge pipe; 52, exhaust pipe;

[0033] 61, first channel; 62, second channel;

[0034] 71, material turning support; 711, horizontal rod; 72, material turning rod. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] As shown in the drawings, Figures 1-6 A sludge low-temperature drying device provided by the present application includes a pretreatment box and a drying box, and the drying box is provided with a conveying mechanism, an air supply mechanism and a dehumidifying mechanism. The pretreatment box is used for pretreating sludge, and is usually provided with a breaking roller and a shaping roller to break, cut and block the sludge, so as to improve the drying effect of the sludge. The internal structure of the pretreatment box has been fully disclosed in the prior art, and thus will not be described in detail in the present embodiment. The conveying mechanism is used for conveying the sludge at the inlet end 11 to the outlet end 21. The air supply mechanism is used for supplying dry hot air into the drying box, and the dry hot air blows the sludge on the conveying mechanism to dry the sludge. The dehumidifying mechanism is used for absorbing the humid hot air in the drying box and the moisture in the absorbed humid hot air.

[0037] In the embodiment, the drying box comprises an upper box body 1 and a lower box body 2, the upper box body 1 is sealingly connected to the lower box body 2, one end of the top of the upper box body 1 is provided with an inlet 11, a pretreatment box is communicated with the inlet 11, one end of the bottom of the lower box body 2 is provided with an outlet 21, and the inlet 11 and the outlet 21 are located on the same side of the drying box. A plurality of supporting legs 22 are arranged on the lower box body 2, the drying box is supported by the plurality of supporting legs 22 to be high, so that the container is placed below the outlet 21 to receive the material, or the outlet 21 is matched with the outlet device to discharge the material.

[0038] In the embodiment, the conveying mechanism comprises a conveying belt 31, a first material guiding member 32 and a second material guiding member 33. The lower box body 2 is provided with a first installation groove 23, and the conveying belt 31 is installed in the first installation groove 23. Specifically, the conveying belt 31 is provided with a driving roller 341 and a driven roller 342, the driving roller 341 and the driven roller 342 are rotatably installed at two ends of the lower box body 2, the conveying belt 31 is tensioned between the driving roller 341 and the driven roller 342, the lower box body 2 is provided with a driving motor 35, and the driving motor 35 is in transmission connection with the driving roller 341. The conveying belt 31 comprises a first conveying section 311 and a second conveying section 312, the first conveying section 311 is located below the inlet 11, the second conveying section 312 is located above the outlet 21, the first material guiding member 32 is arranged on the first conveying section 311, the second material guiding member 33 is arranged on the second conveying section 312, and the second material guiding member 33 is communicated with the outlet 21. When the driving motor 35 works, the driving roller 341 drives the conveying belt 31 to work, when the sludge on the first conveying section 311 moves to the first material guiding member 32, the first material guiding member 32 guides the sludge to the second conveying section 312, so that the sludge is turned over. When the sludge on the second conveying section 312 moves to the second material guiding member 33, the second material guiding member 33 guides the sludge to the outlet 21.

[0039] In the embodiment, the first installation groove 23 of the lower box body 2 is provided with a second installation groove 24 and a third installation groove 25 on both sides, the first material guiding member 32 is arranged in the second installation groove 24, and the second material guiding member 33 is arranged in the third installation groove 25. The first material guiding member 32 and the second material guiding member 33 are the same in structure, and the first material guiding member 32 is taken as an example for detailed description:

[0040] The first material guiding member 32 comprises a material guiding box 321 and a material guiding plate 322. The material guiding box 321 is arranged in the first mounting groove 23 and fixedly connected with the lower box body 2. The material guiding box 321 is provided with a material receiving port 323 and a material discharging port 324. The material guiding plate 322 is arranged above the conveying belt 31 and the lower surface of the material guiding plate 322 is attached to the conveying belt 31. The material guiding plate 322 is provided with an inclined surface 325. The material discharging port 324 is located above the second conveying section 312. When the sludge on the first conveying section 311 moves to the material guiding plate 322, the inclined surface 325 guides the sludge on the conveying belt 31 into the material receiving port 323 and then falls from the material discharging port 324 to the second conveying section 312, thereby realizing the overturning of the sludge. In other embodiments, the first material guiding member 32 and the second material guiding member 33 can also only be provided with the material guiding plate 322. In this embodiment, the material guiding box 321 can collect the sludge guided by the material guiding plate 322, thereby avoiding the random scattering of the sludge.

[0041] In this embodiment, the inclined surface 325 is provided with two inclined surfaces 325 which are symmetrically arranged. By guiding the sludge to both sides, the sludge is prevented from being blocked due to the accumulation of the sludge at one end. The two sides of the material guiding box 321 are provided with guide inclined surfaces so that the sludge in the material receiving port 323 slides down along the guide inclined surfaces to the material discharging port 324. It should be noted that the end surface of the material guiding plate 322 is arranged downwardly from the side away from the conveying belt 31 to the side close to the conveying belt 31, thereby facilitating the shoveling of the sludge on the conveying belt 31 away from the conveying belt 31, ensuring the guiding effect and preventing the sludge from remaining on the conveying belt 31.

[0042] In this embodiment, the air supply mechanism comprises a warm air blower 41 and an air supply pipe 42. One end of the lower box body 2 close to the discharge port 21 is provided with an air inlet 26. The warm air blower 41 is fixedly installed on one end of the lower box body 2 close to the air inlet 26. One end of the air supply pipe 42 is in communication with the warm air blower 41 and the other end is in communication with the air inlet 26. One end of the upper box body 1 close to the material inlet 11 is provided with an air outlet 12. The dehumidifying mechanism comprises a dehumidifier 5 which is fixedly installed on one end of the upper box body 1 close to the air outlet 12. The dehumidifier 5 is in communication with the air outlet 12. The bottom of the dehumidifier 5 is provided with a liquid discharge pipe 51 and the top of the dehumidifier 5 is provided with an exhaust pipe 52. The liquid discharged from the liquid discharge pipe 51 is sterilized and filtered and then recycled. The gas discharged from the exhaust pipe 52 is filtered and purified and then discharged. A dehumidifying mechanism with sterilization and filtration functions can also be directly used.

[0043] In the embodiment, the upper box body 1 and the conveying belt 31 form a first channel 61, the first conveying section 311 is located in the first channel 61, the lower box body 2 and the conveying belt 31 form a second channel 62, the second conveying section 312 is located in the second channel 62, and the first channel 61 is communicated with the second channel 62 through the first material guiding piece 32. The airflow blown by the air supply mechanism enters the dehumidification mechanism through the air inlet 26, the first channel 61, the first material guiding piece 32 and the second channel 62 in sequence, and dries the sludge on the first conveying section 311 and the second conveying section 312, and the airflow (dry hot air) blows from the discharge port 21 end to the feeding port 11 end, effectively improving the drying efficiency. In other embodiments, the air supply mechanism can be directly arranged at the bottom of the drying box, the dehumidification mechanism can be arranged at the top of the drying box, and the drying can be realized by arranging through holes on the conveying belt 31 for the airflow to pass through.

[0044] In the embodiment, the side wall of the first mounting groove 23 abuts against the second conveying section 312, and the side wall of the upper box body 1 abuts against the first conveying section 311, so as to guarantee the sealing performance of the first channel 61 and the second channel 62, avoid the dry hot air from escaping, and also avoid the sludge on the first conveying section 311 and the second conveying section 312 from falling off.

[0045] In the embodiment, the ventilation cavities 231 are arranged in the two side walls of the first mounting groove 23, the air inlet 26 is communicated with the ventilation cavities 231 through the connecting pipelines 261, and the ventilation grooves 232 are arranged on the two side walls of the first mounting groove 23. The ventilation grooves 232 communicate the ventilation cavities 231 with the second channel 62. The dry hot air can be blown into the second channel 62 through the ventilation cavities 231 and the ventilation grooves 232 by the warm air blower 41, so as to reduce the escape of the dry hot air entering through the air inlet 26 from the discharge port 21.

[0046] In the embodiment, the first channel 61 and the second channel 62 are both provided with a material turning assembly, the material turning assembly comprises a material turning support 71 and a plurality of material turning rods 72, the material turning support 71 is fixedly connected with the drying box, and the plurality of material turning rods 72 are fixedly connected with the material turning support 71. It should be noted that the material turning support 71 comprises a plurality of cross bars 711, the plurality of material turning rods 72 are uniformly fixedly installed on the plurality of cross bars 711, and the material turning rods 72 on adjacent cross bars 711 are arranged in a staggered manner. When the conveying belt 31 conveys the sludge, the plurality of material turning rods 72 can turn the sludge on the conveying belt 31, so that the sludge can be uniformly dried, and the drying effect of the sludge is improved.

[0047] The working principle of the present application is as follows:

[0048] Firstly, the driving motor 35 is controlled to work, and the driving motor 35 drives the conveying belt 31 to move through the driving roller 341;

[0049] Then, the sludge is pretreated by breaking, cutting and dicing in the pretreatment box, and the pretreated sludge falls onto the first conveying section 311 of the conveying belt 31 through the feeding port 11, and the conveying belt 31 conveys the sludge to the first guide member 32.

[0050] When the sludge on the first conveying section 311 is conveyed to the first guide member 32, the guide plate 322 of the first guide member 32 shovels the sludge on the conveying belt 31 away from the conveying belt 31 and guides the sludge to the receiving port 323, and the sludge passes through the guide box 321 and falls onto the second conveying section 312 from the discharging port 324 of the guide box 321. The conveying belt 31 works to convey the sludge on the second conveying section 312 to the direction of the second guide member 33.

[0051] When the sludge on the second conveying section 312 is conveyed to the second guide member 33, the guide plate 322 of the second guide member 33 shovels the sludge on the conveying belt 31 away from the conveying belt 31 and guides the sludge to the discharging port 21, and finally the sludge is discharged from the drying box through the discharging port 21.

[0052] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application. The technical, shape and structure parts not described in detail in the present application are all known technologies.

Claims

1. A sludge low-temperature drying device, comprising a pretreatment box and a drying box, wherein the drying box is provided with a conveying mechanism, an air supply mechanism and a dehumidification mechanism, the drying box includes an inlet (11) and an outlet (21), the conveying mechanism being used to convey sludge from the inlet (11) end to the outlet (21) end, characterized in that, The conveying mechanism includes a conveyor belt (31), a first guide (32), and a second guide (33). The conveyor belt (31) includes a first conveying section (311) and a second conveying section (312). The first conveying section (311) is located below the inlet (11). The first guide (32) is disposed on the first conveying section (311) and is used to guide the sludge in the first conveying section (311) to the second conveying section (312). The second guide (33) is disposed on the second conveying section (312) and is used to guide the sludge on the second conveying section (312) to the outlet (21). The first guide component (32) and the second guide component (33) have the same structure. The first guide component (32) includes a guide box (321) and a guide plate (322). The guide box (321) is fixedly connected to the drying box. The guide box (321) is provided with a receiving port (323) and a discharging port (324). The guide plate (322) is located above the conveyor belt (31). The guide plate (322) is provided with an inclined surface (325). The inclined surface (325) is used to guide the sludge from the first conveying section (311) into the receiving port (323). The discharging port (324) is located above the second conveying section (312). Two inclined surfaces (325) are provided, and the two inclined surfaces (325) are symmetrically arranged. The inclined surfaces (325) are used to guide the sludge to both sides. Both sides of the feed box (321) are provided with guide inclined surfaces. The sludge in the receiving port (323) slides down the guide inclined surfaces to the discharge port (324).

2. The sludge low-temperature drying device according to claim 1, characterized in that, The drying box includes an upper box (1) and a lower box (2). The lower box (2) has a first mounting groove (23) and the conveyor belt (31) is installed in the first mounting groove (23). The upper box (1) is sealed to the lower box (2). The upper box (1) and the conveyor belt (31) form a first channel (61). The first conveying section (311) is located in the first channel (61). The lower box (2) and the conveyor belt (31) form a second channel (62). The second conveying section (312) is located in the second channel (62). The first channel (61) is connected to the second channel (62) through a first guide (32).

3. The sludge low-temperature drying device according to claim 2, characterized in that, The first mounting groove (23) has a second mounting groove (24) at one end and a third mounting groove (25) at the other end. The first guide (32) is installed in the second mounting groove (24), and the second guide (33) is installed in the third mounting groove (25). The second guide (33) is connected to the discharge port (21).

4. The sludge low-temperature drying device according to claim 3, characterized in that, The feed inlet (11) is located at one end of the top of the upper box (1), the discharge port (21) is located at one end of the bottom of the lower box (2), the lower box (2) is provided with an air inlet (26) near the discharge port (21), the air supply mechanism is connected to the air inlet (26), the upper box (1) is provided with an air outlet (12) near the feed inlet (11), the dehumidification mechanism is connected to the air outlet (12), and the hot air flow blown out by the air supply mechanism enters the dehumidification mechanism through the air inlet (26), the first channel (61), the first guide (32) and the second channel (62) in sequence.

5. The sludge low-temperature drying device according to claim 4, characterized in that, The air supply mechanism includes a heater (41) and an air supply pipe (42). The heater (41) is fixedly installed on the lower housing (2). One end of the air supply pipe (42) is connected to the heater (41), and the other end is connected to the air inlet (26).

6. The sludge low-temperature drying device according to claim 4, characterized in that, The dehumidification mechanism includes a dehumidifier (5), which is fixedly connected to the upper housing (1), and is connected to the air outlet (12). A drain pipe (51) is provided at the bottom of the dehumidifier (5), and an exhaust pipe (52) is provided at the top of the dehumidifier (5).

7. The sludge low-temperature drying device according to claim 4, characterized in that, The side wall of the first mounting groove (23) abuts against the second conveying section (312). Ventilation chambers (231) are provided in both side walls of the first mounting groove (23). The air inlet (26) is connected to the ventilation chamber (231) through the connecting pipe (261). Several ventilation slots (232) are provided on both side walls of the first mounting groove (23). The ventilation slots (232) connect the ventilation chamber (231) to the second channel (62).

8. The sludge low-temperature drying device according to claim 2, characterized in that, Both the first channel (61) and the second channel (62) are equipped with a material turning assembly. The material turning assembly includes a material turning bracket (71) and a plurality of material turning rods (72). The material turning bracket (71) is fixedly connected to the drying box, and the plurality of material turning rods (72) are fixedly connected to the material turning bracket (71).

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