CN118561496A - A sludge drying device - Google Patents

Abstract

The invention discloses a sludge drying device, which comprises an upper shell, a lower shell, a heat exchange tube and an outer sleeve, wherein an upper partition plate is arranged in the upper shell so as to divide the upper shell into a sludge inlet chamber and an exhaust chamber, the sludge inlet chamber is provided with a sludge inlet, the exhaust chamber is provided with an exhaust outlet, a lower partition plate is arranged in the lower shell so as to divide the lower shell into an air inlet chamber and a cooling chamber, the air inlet chamber is provided with an air inlet, the cooling chamber is provided with a refrigerant inlet and a refrigerant outlet, the upper end of the outer sleeve is connected with the lower end of the upper shell, the lower end of the outer sleeve is connected with the upper end of the lower shell and is communicated with the air inlet chamber, the heat exchange tube is arranged in the outer sleeve and has an annular gap therebetween, the upper end of the heat exchange tube penetrates into the exhaust chamber, a sludge inlet short tube is arranged in the exhaust chamber, the upper end of the sludge inlet short tube penetrates through the upper partition plate, the lower end of the heat exchange tube penetrates through the lower shell, and the wall of the lower shell is uniformly distributed with vent holes corresponding to the annular gap area, so that sludge can be directly contacted with hot air flow for drying, and dust in the hot air flow is not required to be increased after drying.

Description

A sludge drying device

Technical Field

The invention belongs to the technical field of sludge drying, and in particular relates to a sludge drying device.

Background Art

Common sludge drying devices can be divided into two types according to the heat exchange characteristics between the heating media: direct heat exchange type and indirect heat exchange type. Among them, disc dryers, thin layer dryers, paddle dryers, etc. are indirect heat exchange drying equipment; belt dryers, rotary dryers and fluidized bed dryers are direct heat exchange drying equipment.

The direct heat exchange method between the sludge and the heating medium has advantages in terms of overall heat exchange intensity and heat exchange effect, but at the same time, there are practical problems such as the large amount of fine sludge dust carried by the mixed gas, which increases the difficulty of subsequent separation of the mixed gas and dust and high operating energy consumption. In addition, there are also problems such as slow heat exchange speed between the heating medium and wet sludge, insufficient heat exchange uniformity between gas and solid, and long sludge drying cycle.

Summary of the invention

In order to solve the above technical problems, the object of the present invention is to provide a sludge drying device with a simple structure, which can directly contact the hot air flow with the sludge to heat and dry the sludge, and the dust content in the hot air flow discharged after drying is low.

In order to solve the above technical problems, the technical solution of the present invention is as follows: a sludge drying device, comprising an upper shell, a lower shell, a heat exchange tube and an outer sleeve, the upper shell is located above the lower shell, an upper partition is arranged in the upper shell to separate the upper shell into a mud inlet chamber located above and an exhaust chamber located below, a mud inlet connected to the mud inlet chamber is arranged on the upper end or side wall of the upper shell, an exhaust port connected to the exhaust chamber is arranged on the side wall of the upper shell, a lower partition is arranged in the lower shell to separate the lower shell into an air inlet chamber located above and a cooling chamber located below, an air inlet connected to the air inlet chamber and a refrigerant inlet and a refrigerant outlet connected to the cooling chamber are arranged on the side wall of the lower shell, and the outer sleeve is vertically arranged. The heat exchange tube is vertically arranged in the outer sleeve, and an annular gap is provided between the two. The upper end of the heat exchange tube passes through the exhaust chamber. A short mud inlet pipe is also provided in the exhaust chamber. The upper end of the short mud inlet pipe is connected to the upper partition plate and passes through the upper partition plate, and a mud outlet hole is formed on the upper partition plate corresponding to the penetration point of the short mud inlet pipe. The lower end of the short mud inlet pipe extends into the heat exchange tube, and the lower end of the heat exchange tube passes through the lower shell, and the lower end thereof passes out of the lower shell. A ventilation hole that passes through the annular gap is provided on the tube wall of the heat exchange tube.

The beneficial effect of the above technical solution is that the sludge can enter the mud inlet chamber through the mud inlet port, and be discharged into the heat exchange tube through the mud inlet short pipe to flow downward, while the hot air flow is introduced into the air inlet chamber, the hot air flow flows upward through the annular gap, and enters the heat exchange tube through multiple ventilation holes to contact the sludge to dry the sludge, and the hot air flow in the heat exchange tube flows upward, enters the exhaust chamber through the top of the heat exchange tube, and there is a fan at the exhaust port to form a negative pressure, which can prevent the hot air flow from flowing upward into the mud inlet chamber through the heat exchange tube, and after the sludge is dried in the heat exchange tube, during the process of downward discharge through the heat exchange tube, a cooling medium is introduced into the cooling chamber to cool the dried hot sludge at the lower end of the heat exchange tube, thereby realizing the reuse of the sensible heat contained in the hot sludge.

The above technical solution also includes a cylindrical shell vertically arranged between the upper shell and the lower shell, and the two ends of the cylindrical shell are respectively connected to the ends of the upper shell and the lower shell that are close to each other, and together they enclose a chamber, and the outer sleeve and the heat exchange tube are both located in the chamber.

The beneficial effect of the above technical solution is that it reduces the footprint and improves the overall thermal insulation performance of the equipment.

The above technical solution also includes a vertically arranged trumpet-shaped mud discharge bucket, the larger opening end of the mud discharge bucket faces upward and is connected to the lower end of the lower shell, the smaller opening end of the mud discharge bucket faces downward and forms a mud discharge port, and the mud discharge bucket is used to collect the sludge discharged from the lower end of the heat exchange tube after drying.

The beneficial effect of the above technical solution is that the dried sludge is discharged downward through the sludge discharge hopper.

In the above technical solution, heat dissipation fins are arranged on the outer wall of the heat exchange tube in the area corresponding to the cooling chamber; and heat exchange fins are evenly distributed on the outer wall of the mud inlet short tube.

The beneficial effect of the above technical solution is that: in this way, the sludge cooling and heat exchange effect at the lower end of the heat exchange tube is improved, and the sensible heat of the hot sludge after drying is recovered; and the heat exchange fins on the outer side of the mud inlet short tube are used to recover the waste heat brought out by the mixed hot air flow after drying, and heat the sludge that has just entered the mud inlet short tube, thereby realizing double energy recovery.

In the above technical solution, there are multiple heat exchange tubes and outer casings, and the multiple heat exchange tubes correspond to the multiple outer casings one by one. Each heat exchange tube is located in the corresponding outer casing, and the multiple outer casings are evenly distributed between the upper shell and the lower shell. The upper partition is provided with multiple mud outlet holes, and the multiple mud outlet holes correspond to the multiple heat exchange tubes one by one and are aligned with each other.

The beneficial effect of the above technical solution is that multiple heat exchange tubes can simultaneously dry the sludge, thus improving the sludge treatment efficiency.

The above technical solution also includes a sludge distributor arranged on the upper shell, and the sludge distributor is used to sweep the sludge in the sludge inlet chamber until the sludge in the sludge inlet chamber is discharged from the multiple sludge outlet holes through the multiple sludge inlet short pipes into the multiple heat exchange tubes.

The beneficial effect of the above technical solution is that the sludge in the sludge inlet chamber can be scraped into multiple heat exchange tubes through the sludge distributor and the sludge inlet short pipe, so that the sludge inlet amount in each heat exchange tube is uniform and stable.

The sludge distributor in the above technical solution includes a driving motor, a rotating shaft and a scraper pulp. The rotating shaft is vertically arranged in the mud inlet chamber, and its upper end passes through the upper end of the upper shell and is rotatably connected to the top wall of the upper shell. The driving motor is arranged at the upper end of the upper shell and is transmission-connected to the upper end of the rotating shaft. The scraper pulp is arranged at the lower end of the rotating shaft, and the lower end of the scraper pulp is in contact with the upper end of the upper partition. The driving motor drives the rotating shaft to drive the scraper pulp to scrape the sludge in the mud inlet chamber out through the mud outlet hole, and enter the heat exchange tube through the mud inlet short pipe.

The beneficial effects of the above technical solution are: it has a simple structure and a good effect on scraping out sludge.

In the above technical solution, a mud guide is also provided on the heat exchange tube, and the mud guide is used to guide the sludge in the heat exchange tube from top to bottom.

The beneficial effect of the above technical solution is that the sludge in the heat exchange tube can be discharged smoothly from top to bottom under the action of the sludge guide during the drying process.

The mud guiding member in the above technical scheme includes a hollow rotating driving member, a mud scraping member and a spiral conveying member, the hollow rotating driving member is coaxially installed at the lower end of the heat exchange tube, the mud scraping member and the spiral conveying member are both vertically arranged in the heat exchange tube, and the spiral conveying member is located at the lower end of the mud scraping member and connected to the mud scraping member, the lower end of the spiral conveying member is transmission-connected with the hollow rotating driving member, the lower end of the spiral conveying member is inserted into the hollow rotating driving member, the hollow rotating driving member is used to drive the corresponding mud scraping member and the spiral conveying member to rotate in the corresponding heat exchange tube, the mud scraping member is used to scrape the sludge adhered to the inner wall of the heat exchange tube downward, the spiral conveying member is used to crush the dried sludge at the lower end of the heat exchange tube and convey and output it downward, and can also dynamically adjust the sludge drying processing amount, processing speed, etc.

The beneficial effect of the above technical solution is that: since the water content of the sludge in the heat exchange tube gradually decreases during the process of being transported from top to bottom, and the sludge on the upper part of the heat exchange tube is like a paste, it has adhesiveness and will adhere to the inner wall of the heat exchange tube, so the sludge on the inner wall of the heat exchange tube is continuously scraped off by the scraper, and the sludge at the lower end of the heat exchange tube is relatively dry and easy to clump, so a spiral conveyor is used to break up the clumped sludge and send it downward, and both the scraper and the spiral conveyor are driven by the hollow rotating drive member to rotate.

The scraper member in the above technical solution is a cylindrical hollow frame, the upper end of the scraper member is rotatably connected to the lower end of the upper partition, and the scraper member and the lower end of the scraper member are coaxially connected to the spiral conveyor.

The beneficial effect of the above technical solution is that the scraper can scrape off the sludge on the inner wall of the heat exchange tube without affecting the normal downward flow of the sludge in the heat exchange tube.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional view of a sludge drying device according to Embodiment 1 of the present invention;

FIG2 is a top view of the scraping slurry in the mud inlet chamber in Embodiment 1 of the present invention;

FIG3 is a cross-sectional view of the sludge drying device according to Embodiment 2 of the present invention;

FIG4 is a schematic structural diagram of the outer sleeve, the heat exchange tube and the mud guide member in Example 2 of the present invention;

FIG5 is a vertical view of the mud guide member in Embodiment 2 of the present invention;

FIG6 is a vertical view of the scraper member according to Embodiment 2 of the present invention;

FIG. 7 is a vertical view of the spiral conveyor member in Embodiment 2 of the present invention.

In the figure: 1, upper shell; 11, upper partition; 111, mud outlet hole; 12, mud inlet chamber; 121, mud inlet port; 13, exhaust chamber; 131, exhaust port; 14, mud inlet short pipe; 141, heat exchange fin; 2, lower shell; 21, lower partition; 22, air inlet chamber; 221, air inlet port; 23, cooling chamber; 231, refrigerant inlet; 232, refrigerant outlet; 3, heat exchange tube; 31, ventilation hole; 32, heat dissipation fin; 4. Outer sleeve; 5. Cylinder shell; 6. Mud discharge bucket; 7. Sludge distributor; 71. Driving motor; 72. Rotating shaft; 73. Scraper slurry; 8. Mud guide member; 81. Hollow rotating driving member; 82. Mud scraper member; 821. First cylinder; 822. Second cylinder; 823. Scraper rod; 824. Connecting ring; 83. Screw conveyor member; 831. Third cylinder; 832. Fourth cylinder; 833. Screw; 84. Bearing member.

DETAILED DESCRIPTION

The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

Example 1

As shown in FIG1 , this embodiment provides a sludge drying device, comprising an upper shell 1, a lower shell 2, a heat exchange tube 3 and an outer sleeve 4, wherein the upper shell 1 is located above the lower shell 2, an upper partition 11 is provided in the upper shell 1 to separate the upper shell 1 into a mud inlet chamber 12 located above and an exhaust chamber 13 located below, a mud inlet 121 communicating with the mud inlet chamber 12 is provided on the upper end or side wall of the upper shell 1, an exhaust port 131 communicating with the exhaust chamber 13 is provided on the side wall of the upper shell 1, and a lower partition 21 is provided in the lower shell 2 to separate the lower shell 2 into an air inlet chamber 22 located above and an exhaust chamber 13 located below. The cooling chamber 23 is located below, and the side wall of the lower shell 2 is provided with an air inlet 221 communicating with the air inlet chamber 22, and a refrigerant inlet 231 and a refrigerant outlet 232 communicating with the cooling chamber 23. The outer sleeve 4 is vertically arranged between the upper shell 1 and the lower shell 2, and the upper end of the outer sleeve 4 is connected to the lower end of the upper shell 1 (the upper end of the outer sleeve is not connected to the exhaust chamber), and the lower end of the outer sleeve 4 is connected to the upper end of the lower shell 2 and is connected to the air inlet chamber 22. The heat exchange tube 3 is vertically arranged in the outer sleeve 4, and there is an annular gap between the two. The upper end of the heat exchange tube 3 passes through the In the exhaust chamber, a short mud inlet pipe 14 is also provided in the exhaust chamber 13, the upper end of the short mud inlet pipe 14 is connected to the upper partition 11 and penetrates the upper partition 11, and the penetration of the short mud inlet pipe 14 on the upper partition 11 forms a mud outlet hole 111, the lower end of the short mud inlet pipe 14 extends into the heat exchange tube 3 (the depth of the short mud inlet pipe inserted into the heat exchange tube can be 5-10cm), the lower end of the heat exchange tube 3 penetrates the lower shell 2, and the lower end thereof passes through the outside of the lower shell 2, and the tube wall of the heat exchange tube 3 is provided with a ventilation hole 31 that penetrates the annular gap, so that the sludge can pass through the short mud inlet pipe 14. The hot air flows upward through the annular gap and enters the heat exchange tube through the vents to contact with the sludge to dry the sludge. The hot air in the heat exchange tube flows upward and enters the exhaust chamber through the top of the heat exchange tube. A fan is used for suction at the exhaust port to form a negative pressure, which can prevent the hot air from flowing upward through the heat exchange tube into the mud inlet chamber. During the downward discharge of the sludge through the heat exchange tube, a cooling medium is introduced into the cooling chamber to cool the dried sludge at the lower end of the heat exchange tube (the sensible heat contained in the hot sludge can be reused during the cooling process).

The ventilation holes on the heat exchange tubes described in this embodiment are all arranged vertically and tilted, with one end close to the tube tilted downward, which can prevent sludge from overflowing through the ventilation holes. In addition, the pressure in the annular gap is higher than the pressure in the heat exchange tube, which makes it difficult for sludge to block the ventilation holes.

The ventilation holes on the wall of the heat exchange tube in this embodiment are arranged according to the following rules: on the wall of the heat exchange tube, the density of the ventilation holes gradually decreases from bottom to top, while the aperture of the ventilation holes gradually increases.

The above technical solution also includes a cylindrical shell 5 vertically arranged between the upper shell 1 and the lower shell 2, and the two ends of the cylindrical shell 5 are respectively connected to the ends of the upper shell 1 and the lower shell 2 that are close to each other, and together they enclose a chamber, and the outer sleeve 4 and the heat exchange tube 3 are both located in the chamber, so that the footprint is small and the overall thermal insulation performance of the equipment is good.

The above technical solution also includes a vertically arranged trumpet-shaped mud discharge bucket 6, the larger opening end of the mud discharge bucket 6 faces upward and is connected to the lower end of the lower shell 2, and the smaller opening end of the mud discharge bucket 6 faces downward and forms a mud discharge port. The mud discharge bucket 6 is used to collect the sludge after drying discharged from the lower end of the heat exchange tube 3, so that the dried sludge is discharged downward through the mud discharge bucket.

In the above technical solution, there are multiple heat exchange tubes 3 and multiple outer casings 4, and the multiple heat exchange tubes 3 correspond to the multiple outer casings 4 one by one. Each heat exchange tube 3 is located in the corresponding outer casing 4, and the multiple outer casings 4 are evenly distributed between the upper shell 1 and the lower shell 2. The upper partition 11 has multiple mud outlet holes 111, and the multiple mud outlet holes 111 correspond to the multiple heat exchange tubes 3 one by one and are aligned with each other, so that the multiple heat exchange tubes can dry the sludge at the same time, which makes the sludge treatment efficiency high.

As shown in Figure 2, the above technical solution also includes a sludge distributor 7 arranged on the upper shell 1, and the sludge distributor 7 is used to sweep the sludge in the mud inlet chamber 12 until the sludge in the mud inlet chamber 12 is discharged from the multiple mud outlet holes 111 through the multiple mud inlet short pipes 14 into the multiple heat exchange tubes 3, so that the sludge in the mud inlet chamber can be scraped into the multiple heat exchange tubes through the sludge distributor, so that the amount of mud entering each heat exchange tube is uniform and stable.

The sludge distributor 7 in the above technical solution includes a driving motor 71, a rotating shaft 72 and a scraper slurry 73. The rotating shaft 72 is vertically arranged in the mud inlet chamber 12, and its upper end passes through the upper end of the upper shell 1 and is rotatably connected to the top wall of the upper shell 1. The driving motor 71 is arranged at the upper end of the upper shell 1 and is transmission-connected to the upper end of the rotating shaft 72. The scraper slurry 73 is arranged at the lower end of the rotating shaft 72, and the lower end of the scraper slurry 73 is in contact with the upper end of the upper partition 11. The driving motor 71 drives the rotating shaft 72 to drive the scraper slurry 73 to scrape the sludge in the mud inlet chamber 12 through the mud outlet hole 111, and enter the heat exchange tube 3 through the mud inlet short tube. The structure is simple and the scraping effect of the sludge is good. The scraper slurry in this embodiment can be two rods cross-connected in a "cross" shape, and the intersection of the two is vertically connected to the lower end of the rotating shaft. Since the rotating shaft is located in the middle of the upper end of the upper shell 1, the mud inlet can be arranged at the edge position of the upper end of the upper shell.

The outer wall of the heat exchange tube 3 in the above technical solution is provided with heat dissipation fins 32 in the area corresponding to the cooling chamber 23, so that the sludge cooling and heat exchange effect at the lower end of the heat exchange tube is improved, and the sensible heat of the hot sludge after drying is recovered at the same time; the outer wall of the mud inlet short tube in the above technical solution is evenly distributed with heat exchange fins 141, which are used to recover the waste heat brought out by the mixed hot air flow after drying, heat the sludge just entering the mud inlet short tube, and realize double energy recovery.

The cooling medium in this embodiment can be air or water (which can be at room temperature), so that the cooling medium can be used to cool the dried sludge and recover heat, and the cooling medium is preheated after absorbing heat, and can be reused after preheating (taking the cooling medium as air as an example, it can continue to be heated and reused as a hot air flow after being preheated in the cooling chamber, and when the cooling medium is water, it becomes hot water after being heated and can be used for other purposes).

Preferably, in this embodiment, the hot air flow can be flue gas or hot air.

Example 2

The embodiment 1 is the same as that in which, as shown in FIG3 , a mud guide 8 is further provided on the heat exchange tube 3 in the technical solution. The mud guide 8 is used to fully mix the sludge and hot air flow in the heat exchange tube 3 for heat exchange, and to guide the sludge in the heat exchange tube 3 from top to bottom, so that the sludge in the heat exchange tube is fully dried, and can be discharged smoothly from top to bottom under the action of the mud guide during the drying process.

As shown in Figures 3 to 5, the mud guide member 8 in the above technical solution includes a hollow rotating drive member 81, a mud scraper member 82 and a spiral conveyor member 83. The hollow rotating drive member is coaxially installed at the lower end of the heat exchange tube 3. The mud scraper member and the spiral conveyor member are both vertically arranged in the heat exchange tube, and the spiral conveyor member is located at the lower end of the mud scraper member and is connected to the mud scraper member. The lower end of the spiral conveyor member 83 is transmission-connected to the hollow rotating drive member 81, and the lower end of the spiral conveyor member 83 penetrates into the hollow rotating drive member 81. The hollow rotating drive member 81 is used to drive the corresponding mud scraper member 82 and the spiral conveyor member 83 to rotate in the corresponding heat exchange tube 3. The scraper 82 is used to scrape the sludge adhered to the inner wall of the heat exchange tube 3 downward, and the spiral conveyor 83 is used to crush the dried sludge at the lower end of the heat exchange tube 3 and convey it downward for output. Since the water content of the sludge in the heat exchange tube gradually decreases during the downward conveying process, and the sludge on the upper part of the heat exchange tube is like a paste, it has adhesion and will adhere to the inner wall of the heat exchange tube, so the scraper continuously scrapes the sludge on the inner wall of the heat exchange tube, and the sludge at the lower end of the heat exchange tube is relatively dry and easy to agglomerate, so a spiral conveyor is used to break up the agglomerated sludge and send it downward, and the scraper and the spiral conveyor are both driven by the hollow rotating drive member to rotate.

As shown in Figures 5 to 7, the scraper member 82 in the above technical solution is a cylindrical hollow frame, the upper end of the scraper member 82 is rotatably connected to the lower end of the upper partition 11, and the scraper member 82 and the lower end of the scraper member 82 are coaxially connected to the spiral conveyor 83, so that the scraper member can scrape off the sludge on the inner wall of the heat exchange tube without affecting the normal downward flow of the sludge in the heat exchanger. Specifically, the mud inlet short pipe is located at the upper end of the scraper member, and there is a gap between the upper end of the heat exchange tube and the mud inlet short pipe to facilitate the hot air flow through the gap between the two and enter the exhaust chamber.

The upper end of the scraper is rotatably connected to the lower end of the upper partition through a bearing member 84. The driving end of the hollow rotating driving member has an inner hole to connect with the lower end of the spiral conveying member, and the scraper and the spiral conveying member are coaxially connected at one end close to each other. At this time, the scraper will scrape off the sludge attached to the inner wall of the heat exchange tube and convey it downward, while the spiral conveying member will crush the dried sludge and send it downward from the inner hole of the driving end of the hollow rotating driving member. By adjusting the rotation speed of the spiral conveying member, the sludge drying processing volume, processing speed, etc. can also be dynamically controlled.

As shown in FIGS. 5 and 6 , the scraper member of this embodiment includes a first cylinder 821, a second cylinder 822, a plurality of scraper rods 823 and a plurality of connecting rings 824. The first cylinder 821 and the second cylinder 822 are both vertically arranged and vertically spaced apart. The plurality of scraper rods 823 are both vertically arranged and circumferentially spaced apart between the first cylinder 821 and the second cylinder 822. Both ends of each scraper rod 823 are respectively connected to one end of the first cylinder 821 and the second cylinder 822 that is close to each other. The connecting rings 824 are horizontally arranged between the multiple scraper rods 823 and vertically spaced between the multiple scraper rods 823. The edge of each connecting ring 824 is connected to the side of the multiple scraper rods 823 that are close to each other. The upper end of the first cylinder 821 is rotatably connected to the lower end of the upper partition through the bearing member 84. The second cylinder 822 is coaxially connected to the upper end of the spiral conveyor. The multiple scraper rods are in contact with the inner wall of the heat exchange tube to scrape off the sludge attached to the inner wall of the heat exchange tube.

As shown in Fig. 5 and Fig. 7, the spiral conveyor comprises a third cylinder 831, a fourth cylinder 832 and a screw 833, wherein the screw 833 is arranged vertically, and the third cylinder 831 and the fourth cylinder 832 are arranged vertically and coaxially fixedly mounted on the two ends of the screw 833, respectively. The third cylinder 831 is coaxially fixedly connected or integrally formed with the second cylinder 822, and the inner diameter and outer diameter of the first cylinder 821, the second cylinder 822, the third cylinder 831 and the fourth cylinder 832 are consistent and coaxially distributed, and the diameter of the center track of the outer edge of the screw 833 is not greater than the outer diameter of the third cylinder 831 or the fourth cylinder 832. The lower end of the fourth cylinder 832 extends below the heat exchange tube and is coaxially connected to the inner hole of the driving end of the hollow rotating drive member. The hollow rotating drive member can adopt a DD motor.

In this embodiment, the connection between the scraper and the spiral conveyor is aligned with the height position of the lower partition.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (10)

1. A sludge drying device, characterized in that it comprises an upper shell (1), a lower shell (2), a heat exchange tube (3) and an outer sleeve (4), wherein the upper shell (1) is located above the lower shell (2), an upper partition (11) is arranged in the upper shell (1) to separate the upper shell (1) into a mud inlet chamber (12) located above and an exhaust chamber (13) located below, a mud inlet (121) communicating with the mud inlet chamber (12) is arranged on the upper end or side wall of the upper shell (1), and the upper shell (1) is provided with a heat exchange tube (3) and an outer sleeve (4). ) is provided with an exhaust port (131) on the side wall thereof and is communicated with the exhaust chamber (13); a lower partition (21) is provided in the lower shell (2) to divide the lower shell (2) into an air inlet chamber (22) located above and a cooling chamber (23) located below; an air inlet (221) communicating with the air inlet chamber (22) and a refrigerant inlet (231) and a refrigerant outlet (232) communicating with the cooling chamber (23) are provided on the side wall of the lower shell (2); the outer sleeve (4 ) is vertically arranged between the upper shell (1) and the lower shell (2), the upper end of the outer sleeve (4) is connected to the lower end of the upper shell (1), the lower end of the outer sleeve (4) is connected to the upper end of the lower shell (2) and is connected to the air inlet chamber (22), the heat exchange tube (3) is vertically arranged in the outer sleeve (4), and there is an annular gap between the two, the upper end of the heat exchange tube (3) passes through the exhaust chamber, and the exhaust chamber (13) is also provided with a short mud inlet pipe (14), the inlet The upper end of the short mud tube (14) is connected to the upper partition (11) and penetrates the upper partition (11), and a mud outlet hole (111) is formed on the upper partition (11) corresponding to the penetration point of the short mud tube (14). The lower end of the short mud tube (14) extends into the heat exchange tube (3). The lower end of the heat exchange tube (3) penetrates the lower shell (2), and the lower end thereof passes out of the lower shell (2). A ventilation hole (31) that penetrates the annular gap is provided on the tube wall of the heat exchange tube (3). 2. The sludge drying device according to claim 1 is characterized in that it also includes a cylindrical shell (5) vertically arranged between the upper shell (1) and the lower shell (2), and the two ends of the cylindrical shell (5) are respectively connected to the ends of the upper shell (1) and the lower shell (2) that are close to each other, and together form a chamber, and the outer sleeve (4) and the heat exchange tube (3) are both located in the chamber. 3. The sludge drying device according to claim 1 is characterized in that it also includes a vertically arranged trumpet-shaped mud discharge bucket (6), the larger opening end of the mud discharge bucket (6) faces upward and is connected to the lower end of the lower shell (2), and the smaller opening end of the mud discharge bucket (6) faces downward and forms a mud discharge port, and the mud discharge bucket (6) is used to collect the sludge discharged from the lower end of the heat exchange tube (3) after drying. 4. The sludge drying device according to claim 1 is characterized in that heat dissipation fins (32) are provided on the outer wall of the heat exchange tube (3) in the area corresponding to the cooling chamber (23); and heat exchange fins (141) are evenly distributed on the outer wall of the sludge inlet short pipe. 5. The sludge drying device according to any one of claims 1 to 4 is characterized in that a plurality of the heat exchange tubes (3), outer casings (4) and mud inlet short tubes (14) are provided, and the plurality of heat exchange tubes (3), the plurality of outer casings (4) and the plurality of mud inlet short tubes correspond to each other one by one, each heat exchange tube (3) is located in the corresponding outer casing (4), and the plurality of outer casings (4) are evenly distributed between the upper shell (1) and the lower shell (2). 6. The sludge drying device according to claim 5 is characterized in that it also includes a sludge distributor (7) arranged on the upper shell (1), and the sludge distributor (7) is used to sweep the sludge in the sludge inlet chamber (12) until the sludge in the sludge inlet chamber (12) is discharged from the multiple mud outlet holes (111) through the multiple mud inlet short pipes (14) to the multiple heat exchange tubes (3). 7. The sludge drying device according to claim 6 is characterized in that the sludge distributor (7) comprises a driving motor (71), a rotating shaft (72) and a scraper slurry (73); the rotating shaft (72) is vertically arranged in the mud inlet chamber (12), and its upper end passes through the upper end of the upper shell (1) and is rotatably connected to the top wall of the upper shell (1); the driving motor (71) is arranged at the upper end of the upper shell (1) and is transmission-connected to the upper end of the rotating shaft (72); the scraper slurry (73) is arranged at the lower end of the rotating shaft (72), and the lower end of the scraper slurry (73) is in contact with the upper end of the upper partition (11); the driving motor (71) drives the rotating shaft (72) to drive the scraper slurry (73) to scrape the sludge in the mud inlet chamber (12) through the mud outlet hole (111), and enter the heat exchange tube (3) through the mud inlet short pipe (14). 8. The sludge drying device according to claim 1 is characterized in that a sludge guide (8) is also provided on the heat exchange tube (3), and the sludge guide (8) is used to guide the sludge in the heat exchange tube (3) from top to bottom. 9. The sludge drying device according to claim 8 is characterized in that the mud guide member (8) comprises a hollow rotating driving member (81), a mud scraping member (82) and a spiral conveying member (83), the hollow rotating driving member is coaxially installed at the lower end of the heat exchange tube (3), the mud scraping member and the spiral conveying member are both vertically arranged in the heat exchange tube, and the spiral conveying member is located at the lower end of the mud scraping member and is connected to the mud scraping member, and the lower end of the spiral conveying member (83) is connected to the hollow rotating driving member. The hollow rotating driving member (81) is connected to the heat exchange tube (3) by transmission, the lower end of the spiral conveying member (83) is inserted into the hollow rotating driving member (81), the hollow rotating driving member (81) is used to drive the corresponding scraping member (82) and the spiral conveying member (83) to rotate in the corresponding heat exchange tube (3), the scraping member (82) is used to scrape the sludge adhered to the inner wall of the heat exchange tube (3) downward, and the spiral conveying member (83) is used to crush the dried sludge at the lower end of the heat exchange tube (3) and convey it downward and output it. 10. The sludge drying device according to claim 9 is characterized in that the scraper member (82) is a cylindrical hollow frame, the upper end of the scraper member (82) is rotatably connected to the lower end of the upper partition (11), and the scraper member (82) and the lower end of the scraper member (82) are coaxially connected to the spiral conveyor (83).