Thin-layer sludge drying machine for sludge treatment

Abstract

The invention provides a thin-layer sludge drying machine for sludge treatment, and relates to the technical field of sludge treatment. The thin-layer sludge drying machine for sludge treatment comprises a drying machine body, a first sealing cover is installed at one end of the drying machine body, a second sealing cover is installed at the end, away from the first sealing cover, of the drying machine body, a bottom plate is arranged at the bottom end of the drying machine body, and a supporting frame is fixed to the top end of the bottom plate; a driving mechanism is mounted at one end of the drying machine main body, a first heating cavity is formed in the drying machine main body, and a second heating cavity is formed beside the first heating cavity. Steam can uniformly enter the heating cavity, so that uniform heat distribution is ensured, local overheating or insufficient heat exchange is avoided, a stable drying effect is maintained, and uniform steam distribution enables the wall surface temperature of the heating cavity to be consistent, a sludge thin layer to be uniformly heated, moisture evaporation to be more thorough and drying efficiency to be higher.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and more particularly to a thin-layer sludge dryer for sludge treatment. Background Technology

[0002] In industrial and municipal wastewater treatment, sludge treatment has always been a concern for industry professionals. High-volume, high-moisture sludge is extremely inconvenient to store, transport, and handle, making sludge drying essential. Steam drying utilizes steam heat energy, which, through heat exchange in the heat exchanger shell, evaporates the moisture in the sludge, thus drying it. When the temperature of low-pressure steam is between 150-230℃, the safety of sludge drying becomes one of the most critical issues, especially when the sludge dryer operates under high-temperature, dusty conditions, making oxygen content control particularly important. Summary of the Invention

[0003] This invention provides a thin-layer sludge dryer for sludge treatment, addressing the problem mentioned in the background art. In existing thin-layer sludge dryers, sludge is typically dried by pouring it into the dryer and heating it with steam. However, during operation, the steam enters the heating cavity through a single pipe, leading to uneven steam distribution. This can cause excessive heat load in some areas, potentially causing scaling, while reducing heat exchange efficiency in other areas, thus affecting the drying quality and efficiency of the sludge.

[0004] This invention provides a thin-layer sludge dryer for sludge treatment, comprising a dryer body, a first sealing cover installed at one end of the dryer body, a second sealing cover installed at the end of the dryer body away from the first sealing cover, a base plate provided at the bottom of the dryer body, a support frame fixed at the top of the base plate, a drive mechanism installed at one end of the dryer body, a first heating cavity opened inside the dryer body, a second heating cavity opened at one end of the first heating cavity, a baffle plate installed between the first heating cavity and the second heating cavity, and a drive mechanism installed on one side of the dryer body. The dryer is equipped with a feeding mechanism, a heat-conducting mechanism at the top of the dryer body, a heat-conducting pipe at the top of the dryer body, a partition plate inside the heat-conducting pipe, sealing plugs at both ends of the partition plate, a return spring fixed to the bottom of the sealing plug, a moving piston connected to the bottom of the return spring, a first air outlet pipe at one end of the heat-conducting pipe, a second air outlet pipe at the end of the heat-conducting pipe away from the first air outlet pipe, a purification exhaust mechanism at the top of the dryer body, a discharge port at the bottom of the dryer body, and a water outlet at the bottom of the dryer body.

[0005] Preferably, the driving mechanism includes a drive motor installed at one end of the dryer body, a reducer installed at one end of the drive motor, and a transmission shaft installed at one end of the reducer.

[0006] Preferably, one end of the drive shaft is connected to a rotor, a solid scraper is installed on the outer wall of one end of the rotor, a pusher is installed on the outer wall of the end of the rotor away from the solid scraper, and a limit rod is fixed to the end of the rotor away from the drive shaft.

[0007] Preferably, a first bearing seal is installed at one end of the first sealing cover, and a second bearing seal is fixed at one end of the second sealing cover.

[0008] Preferably, the feeding mechanism includes a feeding pipe installed on one side of the dryer body, a preheating pipe sleeved on the outer wall of the feeding pipe, and a heat-conducting cavity opened inside the preheating pipe.

[0009] Preferably, the heat conduction mechanism includes a connector installed at the top of the heat conduction pipe, and a limit stop is fixed at the bottom of the movable piston.

[0010] Preferably, a constant pressure hole is provided at the middle of the partition plate, and a constant pressure pipe is installed on one side of both the first and second air outlet pipes, and a one-way valve is installed on one side of the constant pressure pipe.

[0011] Preferably, the purification and exhaust mechanism includes an exhaust box installed at the top of the dryer body, an exhaust pipe connected to the top of the exhaust box, and a purification pipe connected to one end of the exhaust pipe.

[0012] Preferably, a filter plate is installed inside the purification pipe, a spray head is installed at the top of the filter plate, and a water inlet pipe is connected to the top of the spray head.

[0013] Preferably, the top end of the purification pipe is connected to a connecting pipe, one end of the connecting pipe is equipped with an air pump, one end of the air pump is equipped with a discharge pipe, and the bottom end of the purification pipe is connected to a drain pipe.

[0014] Beneficial effects: Considering the existing thin-layer sludge dryer used for sludge treatment, the sludge is generally poured into the dryer and heated and dried by steam heat exchange to achieve the sludge drying operation. However, during use, because the steam enters the heating cavity through a single pipe, the steam is prone to uneven distribution in the pipe. This can cause some areas to have excessive heat load, which may lead to scaling, while the heat exchange efficiency in other areas decreases, thus affecting the drying quality and efficiency of the sludge.

[0015] This invention uses a drive mechanism to stir and push the sludge, thereby completing the sludge drying process. By turning on the drive motor, the gear transmission of the reducer drives the drive shaft and rotor to rotate. The rotation of the rotor drives the solid scraper and propeller on the outer wall of the rotor to rotate. The scraper on the rotor evenly mixes and conducts heat through the sludge, and the propeller pushes the sludge towards the discharge port, thereby completing the sludge drying process.

[0016] This invention uses a feeding mechanism to pour the sludge to be dried into the interior of the dryer body for drying. The sludge to be dried is poured into the interior of the dryer body through the feeding pipe. During the introduction process, hot steam in the first heating cavity enters the heat conduction cavity through the bottom end of the preheating pipe. The heat conduction cavity surrounds the feeding pipe, thereby preheating the sludge passing through the feeding pipe. In actual use, the length of the feeding pipe and the preheating pipe can be increased according to the degree of preheating.

[0017] In the sludge drying process of this invention, hot steam is introduced into the first and second heating cavities via a heat conduction mechanism for heat transfer. By connecting the hot steam pipe to a connector, hot steam is introduced into the heat-conducting pipe during use. After entering the heat-conducting pipe, the hot steam is separated by a partition plate. Under the pressure of the gas, it pushes down on the two sets of sealing plugs until it is discharged into the first and second heating cavities through the first and second vent pipes. When the pressure inside the first and second heating cavities differs, the gas in the cavity with higher pressure will push the piston on the opposite side upwards through the cavity inside the limiting block, thereby causing the heat-conducting pipe to... The increased pressure required when the steam injected from the top compresses the sealing plug, while the gas compresses the sealing plug at the other end, thus achieving pressure balance between the first and second heating cavities. Simultaneously, as the gas pressure increases, it is also released through the first or second outlet pipe towards the space between the sealing plug and the moving piston. The gas released between the sealing plug and the moving piston flows through the constant pressure orifice to the constant pressure pipe at the lower pressure end, and then flows through the one-way valve into the first or second outlet pipe, thus achieving pressure equalization. Pressure equalization between the first and second heating cavities indicates that the heat conducted by the gas inside both cavities is the same, resulting in uniform temperature between the two cavities and preventing temperature differences from reducing the sludge drying effect.

[0018] To avoid harmful substances in the steam generated during the drying process of wet sludge, this invention filters the steam generated during sludge drying using a purification exhaust mechanism. During the drying process, the moisture in the wet sludge evaporates, generating steam. The steam enters the air guide pipe through the exhaust box and is then guided into the interior of the purification pipe. By turning on the air pump, the steam inside the purification pipe is drawn upwards. During the extraction process, the steam first passes through a filter plate, which filters out large particulate impurities. Simultaneously, by connecting a water inlet pipe to a water pipe, purified water is injected into the water inlet pipe. The water is atomized and sprayed out through a spray nozzle, thus flushing down small particulate impurities in the steam. The purified steam is then discharged through the exhaust pipe, thereby completing the purification and discharge of the steam generated during sludge drying.

[0019] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of the main body of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0023] Figure 3 This is a schematic diagram of the drive mechanism of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0024] Figure 4 This is a schematic diagram of the rotor structure of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0025] Figure 5 This is a schematic diagram of the feeding mechanism of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0026] Figure 6 This is a schematic diagram of the heat-conducting cavity structure of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0027] Figure 7 This is a schematic diagram of the heat conduction mechanism of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0028] Figure 8 This is a schematic diagram of the internal structure of the heat pipe of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0029] Figure 9 This is a schematic diagram of the heating cavity structure of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0030] Figure 10 This is a schematic diagram of the purification and exhaust mechanism of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0031] Figure 11 This is a schematic diagram of the air duct structure of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0032] Figure 12 This is a schematic diagram of the internal structure of the purification pipe of a thin-layer sludge dryer for sludge treatment according to the present invention.

[0033] Explanation of reference numerals in the attached figures: 1. Dryer body; 2. First sealing cover; 3. Second sealing cover; 4. Base plate; 5. Support frame; 6. Drive mechanism; 601. Drive motor; 602. Reducer; 603. Transmission shaft; 604. First bearing shaft seal; 605. Rotor; 606. Solid scraper; 607. Propeller; 608. Limiting rod; 609. Second bearing shaft seal; 7. First heating cavity; 8. Second heating cavity; 9. Baffle plate; 10. Feeding mechanism; 1001. Feed pipe; 1002. Preheating pipe; 1003. Heat conduction cavity; 11. Heat conduction mechanism; 1101. Heat conduction pipe; 1102. Connector; 103. Divider plate; 1104. Sealing plug; 1105. Return spring; 1106. Moving piston; 1107. Limiting block; 1108. First air outlet pipe; 1109. Second air outlet pipe; 1110. Constant pressure hole; 1111. Constant pressure pipe; 1112. One-way valve; 12. Purification and exhaust mechanism; 1201. Exhaust box; 1202. Air guide pipe; 1203. Purification pipe; 1204. Filter plate; 1205. Water inlet pipe; 1206. Spray head; 1207. Through pipe; 1208. Air pump; 1209. Discharge pipe; 1210. Drain pipe; 13. Material outlet; 14. Water outlet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this invention are intended to cover non-exclusive inclusion.

[0036] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the present invention. For example, in the description of the present invention, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" of a mechanical structure can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0040] This invention provides, for example Figure 1-12The thin-layer sludge dryer shown includes a dryer body 1, a first sealing cover 2 installed at one end of the dryer body 1, a second sealing cover 3 installed at the end of the dryer body 1 away from the first sealing cover 2, a base plate 4 provided at the bottom of the dryer body 1, a support frame 5 fixed at the top of the base plate 4, a drive mechanism 6 installed at one end of the dryer body 1, a first heating cavity 7 opened inside the dryer body 1, a second heating cavity 8 opened at one end of the first heating cavity 7, a baffle plate 9 installed between the first heating cavity 7 and the second heating cavity 8, a feeding mechanism 10 installed on one side of the dryer body 1, a heat conduction mechanism 11 installed at the top of the dryer body 1, and a heat conduction pipe 1101 installed at the top of the dryer body 1. The heat pipe 1101 has a partition plate 1103 installed inside. Both ends of the partition plate 1103 are fitted with sealing plugs 1104. A return spring 1105 is fixed to the bottom of the sealing plug 1104, and a moving piston 1106 is connected to the bottom of the return spring 1105. A first exhaust pipe 1108 is installed at one end of the heat pipe 1101, and a second exhaust pipe 1109 is installed at the end of the heat pipe 1101 away from the first exhaust pipe 1108. A purification exhaust mechanism 12 is installed at the top of the dryer body 1, a discharge port 13 is installed at the bottom of the dryer body 1, and a water outlet 14 is installed at the bottom of the dryer body 1. In use, the hot steam pipe is connected to the connector 1102, and during operation, the hot steam is transported through the hot steam pipe. The hot steam is introduced into the heat pipe 1101. After entering the heat pipe 1101, it is separated by the partition plate 1103. Under the pressure of the gas, it will squeeze the two sets of sealing plugs 1104 downwards until it is discharged into the first heating cavity 7 and the second heating cavity 8 through the first vent pipe 1108 and the second vent pipe 1109. When the pressure inside the first heating cavity 7 and the second heating cavity 8 is different, the gas in the cavity with higher pressure will push the piston 1106 on the opposite side upwards through the cavity inside the limiting block 1107. This increases the pressure required for the steam injected into the upper end of the heat pipe 1101 to squeeze the sealing plug 1104. The gas will then squeeze the sealing plug 1104 at the other end, thereby achieving the first heating. The pressure inside cavity 7 and the second heating cavity 8 is balanced. Simultaneously, when the gas pressure increases, it is also released through the first outlet pipe 1108 or the second outlet pipe 1109 towards the space between the sealing plug 1104 and the moving piston 1106. The gas released between the sealing plug 1104 and the moving piston 1106 flows through the constant pressure orifice 1110 to the constant pressure pipe 1111 at the lower pressure end, and then flows through the one-way valve 1112 into the first outlet pipe 1108 or the second outlet pipe 1109, thus achieving pressure balance. The pressure balance between the first heating cavity 7 and the second heating cavity 8 indicates that the heat conducted by the gas inside the first heating cavity 7 and the second heating cavity 8 is the same, resulting in uniform temperature in the first heating cavity 7 and the second heating cavity 8.There will be no reduction in sludge drying effect due to temperature difference. The sludge to be dried is then poured into the dryer body 1 through the feed pipe 1001. During the introduction process, the hot steam in the first heating cavity 7 enters the heat conduction cavity 1003 through the bottom end of the preheating pipe 1002. The heat conduction cavity 1003 wraps around the feed pipe 1001, thus preheating the sludge passing through the feed pipe 1001. In actual use, the length of the feed pipe 1001 and the preheating pipe 1002 can be increased according to the degree of preheating. By turning on the drive motor 601, the gear transmission of the reducer 602 drives the drive shaft 603 and the rotor 605 to rotate. The rotation of the rotor 605 drives the solid scraper 606 and the propeller 607 on the outer wall of the rotor 605 to rotate. The scraper on the rotor 605 evenly mixes and conducts heat, and the propeller 607 propels the sludge towards... The discharge port 13 is pushed in the direction to complete the sludge drying process. During the drying of wet sludge, the water in the wet sludge evaporates to generate steam. The steam enters the air guide pipe 1202 through the exhaust box 1201, and then the air guide pipe 1202 guides the steam into the interior of the purification pipe 1203. By turning on the air pump 1208, the steam inside the purification pipe 1203 is drawn upward. During the extraction process, the steam first passes through the filter plate 1204, which filters out large particulate impurities contained in the steam. At the same time, by connecting the water receiving pipe 1205 to the water pipe, purified water is injected into the water receiving pipe 1205. The water is atomized and sprayed out through the spray head 1206 through the water receiving pipe 1205, thereby flushing down the small particulate impurities in the steam. The purified steam is discharged through the discharge pipe 1209 along the through pipe 1207, thus completing the purification and discharge of the steam generated during sludge drying.

[0041] This solution uses a drive mechanism 6 to stir and propel the sludge, thereby completing the sludge drying process. The drive mechanism 6 includes a drive motor 601 installed at one end of the dryer body 1, a reducer 602 installed at one end of the drive motor 601, a drive shaft 603 installed at one end of the reducer 602, a rotor 605 connected to one end of the drive shaft 603, a solid scraper 606 installed on the outer wall of one end of the rotor 605, a propeller 607 installed on the outer wall of the end of the rotor 605 away from the solid scraper 606, and a limit rod 608 fixed to the end of the rotor 605 away from the drive shaft 603. The first sealing cover 2 has a first bearing shaft seal 604 installed at one end, and the second sealing cover 3 has a second bearing shaft seal 609 fixed at one end. When the drive motor 601 is turned on, the gear transmission of the reducer 602 drives the transmission shaft 603 and the rotor 605 to rotate. The rotation of the rotor 605 will drive the solid scraper 606 on the outer wall of the rotor 605 and the pusher 607 to rotate. The scraper on the rotor 605 will evenly mix and conduct heat, and the pusher 607 will push the sludge towards the discharge port 13, thereby completing the sludge drying process.

[0042] This solution uses a feeding mechanism 10 to pour the sludge to be dried into the interior of the dryer body 1 for drying. The feeding mechanism 10 includes a feeding pipe 1001 installed on one side of the dryer body 1. A preheating pipe 1002 is sleeved on the outer wall of the feeding pipe 1001. A heat-conducting cavity 1003 is opened inside the preheating pipe 1002. The sludge to be dried is poured into the interior of the dryer body 1 through the feeding pipe 1001. During the introduction process, the hot steam in the first heating cavity 7 will enter the interior of the heat-conducting cavity 1003 through the bottom end of the preheating pipe 1002. The heat-conducting cavity 1003 wraps around the feeding pipe 1001, thereby preheating the sludge that has passed through the feeding pipe 1001. In actual use, the length of the feeding pipe 1001 and the preheating pipe 1002 can be increased according to the degree of preheating.

[0043] In this scheme, during the sludge drying process, hot steam is introduced into the first heating cavity 7 and the second heating cavity 8 through a heat conduction mechanism 11 for heat transfer. The heat conduction mechanism 11 includes a connector 1102 installed at the top of the heat conduction pipe 1101, a limit stop 1107 fixed at the bottom of the moving piston 1106, a constant pressure hole 1110 in the middle of the partition plate 1103, and constant pressure pipes 1111 installed on one side of both the first air outlet pipe 1108 and the second air outlet pipe 1109. A one-way valve 1112 is installed on one side of the heat pipe 1. A hot steam pipe is connected to a connector 1102. During use, hot steam is introduced into the interior of the heat pipe 1101 through the hot steam pipe. After entering the heat pipe 1101, the hot steam is separated by a partition plate 1103. Under the pressure of the gas, it will push down on two sets of sealing plugs 1104 until it is discharged into the first heating cavity 7 and the second heating cavity 8 through the first vent pipe 1108 and the second vent pipe 1109. When the pressure inside the first heating cavity 7 and the second heating cavity 8 is not... Simultaneously, the gas in the cavity with higher pressure will push the moving piston 1106 on the opposite side upward through the cavity inside the limiting block 1107. This increases the pressure required for the steam injected into the upper end of the heat pipe 1101 to compress the sealing plug 1104, while the gas compresses the sealing plug 1104 at the other end, thus achieving pressure balance between the first heating cavity 7 and the second heating cavity 8. At the same time, as the gas pressure increases, it will also be discharged through the first vent pipe 1108 or the second vent pipe 1109 between the sealing plug 1104 and the moving piston 1106. The gas between the sealing plug 1104 and the moving piston 1106 flows through the constant pressure hole 1110 to the constant pressure pipe 1111 at the lower pressure end, and then flows through the one-way valve 1112 into the first outlet pipe 1108 or the second outlet pipe 1109, thereby balancing the pressure. The pressure balance between the first heating cavity 7 and the second heating cavity 8 indicates that the heat conducted by the gas inside the first heating cavity 7 and the second heating cavity 8 is the same, thus making the temperature of the first heating cavity 7 and the second heating cavity 8 uniform and preventing the temperature difference from reducing the sludge drying effect.

[0044] To avoid harmful substances in the steam generated during the drying process of wet sludge, this solution uses a purification and exhaust mechanism 12 to filter the steam. The purification and exhaust mechanism 12 includes an exhaust box 1201 installed at the top of the dryer body 1. A guide pipe 1202 is connected to the top of the exhaust box 1201, and a purification pipe 1203 is connected to one end of the guide pipe 1202. A filter plate 1204 is installed inside the purification pipe 1203, and a spray head 1206 is installed at the top of the filter plate 1204. A water inlet pipe 1205 is connected to the top of the spray head 1206. A connecting pipe 1207 is connected to the top of the purification pipe 1203, and an air pump 1208 is installed at one end of the connecting pipe 1207. A discharge pipe 1209 is installed at one end of the air pump 1208, and a drain pipe 1210 is connected to the bottom of the purification pipe 1203. During the wet sludge drying process... During the process, the water in the wet sludge evaporates to generate steam. The steam enters the air guide pipe 1202 through the exhaust box 1201, and then the air guide pipe 1202 guides the steam into the interior of the purification pipe 1203. By turning on the air pump 1208, the steam inside the purification pipe 1203 is drawn upward. During the extraction process, the steam first passes through the filter plate 1204, which filters out large particulate impurities contained in the steam. At the same time, by connecting the water receiving pipe 1205 to the water pipe, purified water is injected into the water receiving pipe 1205. The water is atomized and sprayed out through the spray head 1206 through the water receiving pipe 1205, thereby flushing down the small particulate impurities in the steam. The purified steam is discharged through the discharge pipe 1209 along the through pipe 1207, thus completing the purification and discharge of the steam generated during sludge drying.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thin-layer sludge dryer for sludge treatment, comprising a dryer body (1), characterized in that: A first sealing cover (2) is installed at one end of the main body (1) of the drying machine, and a second sealing cover (3) is installed at the end of the main body (1) away from the first sealing cover (2). A base plate (4) is provided at the bottom end of the main body (1), and a support frame (5) is fixed at the top of the base plate (4). A drive mechanism (6) is installed at one end of the main body (1). A first heating cavity (7) is opened inside the main body (1), and a second heating cavity (8) is opened next to the first heating cavity (7). A baffle plate (9) is installed between the first heating cavity (7) and the second heating cavity (8). A feeding mechanism (10) is installed on one side of the main body (1), and a heat conduction mechanism (11) is installed at the top of the main body (1). A heat-conducting pipe (1101) is installed at the top of the dryer body (1). A partition plate (1103) is installed inside the heat-conducting pipe (1101). A sealing plug (1104) is installed at both ends of the partition plate (1103). A return spring (1105) is fixed at the bottom end of the sealing plug (1104). A moving piston (1106) is connected to the bottom end of the return spring (1105). A first air outlet pipe (1108) is installed at one end of the heat-conducting pipe (1101). A second air outlet pipe (1109) is installed at the end of the heat-conducting pipe (1101) away from the first air outlet pipe (1108). A purification exhaust mechanism (12) is installed at the top of the dryer body (1). A discharge port (13) is installed at the bottom end of the dryer body (1). A water outlet (14) is installed at the bottom of the dryer body (1).

2. A thin-layer sludge dryer for sludge treatment according to claim 1, characterized in that: The drive mechanism (6) includes a drive motor (601) installed at one end of the dryer body (1), a reducer (602) is installed at one end of the drive motor (601), and a transmission shaft (603) is installed at one end of the reducer (602).

3. A thin-layer sludge dryer for sludge treatment according to claim 2, characterized in that: One end of the drive shaft (603) is connected to a rotor (605), a solid scraper (606) is installed on the outer wall of one end of the rotor (605), a pusher (607) is installed on the outer wall of the end of the rotor (605) away from the solid scraper (606), and a limit rod (608) is fixed to the end of the rotor (605) away from the drive shaft (603).

4. A thin-layer sludge dryer for sludge treatment according to claim 1, characterized in that: The first sealing cover (2) is equipped with a first bearing shaft seal (604) at one end, and the second sealing cover (3) is fixed with a second bearing shaft seal (609) at one end.

5. A thin-layer sludge dryer for sludge treatment according to claim 4, characterized in that: The feeding mechanism (10) includes a feeding pipe (1001) installed on one side of the dryer body (1). A preheating pipe (1002) is sleeved on the outer wall of the feeding pipe (1001), and a heat-conducting cavity (1003) is opened inside the preheating pipe (1002).

6. A thin-layer sludge dryer for sludge treatment according to claim 1, characterized in that: The heat conduction mechanism (11) includes a connector (1102) installed at the top of the heat conduction pipe (1101), and a limit stop (1107) is fixed at the bottom of the moving piston (1106).

7. A thin-layer sludge dryer for sludge treatment according to claim 1, characterized in that: The partition plate (1103) has a constant pressure hole (1110) at the middle end. A constant pressure pipe (1111) is installed on one side of the first air outlet pipe (1108) and the second air outlet pipe (1109). A one-way valve (1112) is installed on one side of the constant pressure pipe (1111).

8. A thin-layer sludge dryer for sludge treatment according to claim 1, characterized in that: The purification and exhaust mechanism (12) includes an exhaust box (1201) installed at the top of the dryer body (1), the top of the exhaust box (1201) is connected to an air guide pipe (1202), and one end of the air guide pipe (1202) is connected to a purification pipe (1203).

9. A thin-layer sludge dryer for sludge treatment according to claim 8, characterized in that: The purification pipe (1203) is equipped with a filter plate (1204), and a spray head (1206) is installed at the top of the filter plate (1204). A water inlet pipe (1205) is connected to the top of the spray head (1206).

10. A thin-layer sludge dryer for sludge treatment according to claim 8, characterized in that: The top end of the purification pipe (1203) is connected to a through pipe (1207), one end of the through pipe (1207) is equipped with an air pump (1208), one end of the air pump (1208) is equipped with a discharge pipe (1209), and the bottom end of the purification pipe (1203) is connected to a drain pipe (1210).

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