A hot air drying duct system for sludge drying

Abstract

The present invention relates to the field of hot air drying, and specifically to a hot air drying duct system for sludge drying, comprising a No. 1 feeding mechanism, which is used for preliminary conveying and processing of the sludge; a drying mechanism, which is used for rapid drying of the sludge; a No. 2 feeding mechanism, which is used for secondary drying and external output of the sludge; and an air delivery mechanism, which is used for regulating and controlling the secondary air drying of the sludge; a frame is fixedly installed on the outer sides of the No. 1 feeding mechanism, the drying mechanism, the No. 2 feeding mechanism and the air delivery mechanism, and a return pipe is fixedly installed on the top of the frame. The hot air drying duct system for sludge drying reduces the hot air drying intensity on the surface of the sludge during the conveying process of the sludge with a higher height and a larger volume, thereby avoiding rapid evaporation of moisture on the surface of the sludge due to high-temperature drying, which easily forms a hard shell.

Description

Technical Field

[0001] The invention relates to the technical field of hot air drying, in particular to a hot air drying duct system for sludge drying. Background Art

[0002] Hot air drying, also known as "flash drying", is a process in which the heating medium (air, inert gas, exhaust gas or other hot gas) is in direct contact with the solid particles to be dried, and the solid particles to be dried are suspended in the fluid. Therefore, the contact area between the two phases is large, which enhances the heat and mass transfer process and is widely used in the drying unit operation of bulk granular materials.

[0003] Existing hot air drying systems for sludge drying have the following problems: 1. For larger, taller sludge clumps, the hard shell impedes the continued migration of internal moisture. This reduces the channels for internal moisture to diffuse outward, making it difficult for internal moisture to reach the surface for evaporation. 2. The hot air drying intensity is always consistent across the sludge, resulting in some sludge being over-dried while others remain unevaporated. Summary of the Invention

[0004] The present invention provides a hot air drying duct system for sludge drying to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a hot air drying duct system for sludge drying, comprising a No. 1 feeding mechanism, which is used for preliminary conveying and processing of the sludge;

[0006] Air drying mechanism, which is used for rapid drying of sludge;

[0007] The second conveying mechanism is used to carry out secondary drying of the sludge and to output it for external processing;

[0008] An air delivery mechanism, which is used for regulating and controlling the secondary air drying of the sludge;

[0009] A frame is fixedly installed on the outside of the No. 1 feeding mechanism, the air-drying mechanism, the No. 2 feeding mechanism and the air-delivering mechanism; a return pipe is fixedly installed on the top of the frame; a closing plate and a filter are connected to both sides of the frame respectively; a hot water pan is fixedly installed on the side of the filter away from the closing plate; a No. 2 heat exchanger is fixedly installed on the hot water pan; a cold water pan is provided on the No. 2 heat exchanger; and a No. 1 heat exchanger is provided on the cold water pan;

[0010] The No. 1 feeding mechanism includes a feed pipe, the outer side of the feed pipe is fixedly connected to a mesh belt, the feed pipe and the mesh belt are fixedly connected to the top of the frame, a conveyor belt is arranged below the feed pipe, both sides of the inner cavity of the No. 1 conveyor belt are transmission-connected to a No. 1 transmission roller, both ends of the No. 1 transmission roller are installed with bearing seats, and the bearing seats are fixedly installed on the frame, the top of the inner cavity of the No. 1 conveyor belt is transmission-connected to a No. 1 support roller, both ends of the No. 1 support roller are installed on the frame through bearing seats, a traction plate is provided on the side of the No. 1 conveyor belt away from the feed pipe, and the traction plate is fixedly connected to the inner side of the frame.

[0011] Preferably, the air-drying mechanism includes a center frame, which is fixedly installed in the center part of the frame. The inner side of the center frame is fixedly connected to a frame rod, and the end of the frame rod away from the center frame is fixedly connected to a motor. The output end of the motor is connected to a fan through a coupling.

[0012] Preferably, the top of the center frame is fixedly connected to a top plate, and the bottom of the top plate is fixedly connected to an inclined plate, wherein the number of inclined plates is several and the lengths are different, and a fixed tube is provided on the side of the inclined plate, and the fixed tube is fixedly connected to the bottom of the top plate, and the inner side of the fixed tube is fixedly connected to a connecting strip, and the bottom of the connecting strip is fixedly connected to a stamping rod.

[0013] Preferably, the end of the connecting strip away from the fixed tube is fixedly connected to the inner tube, the interior of the inner tube is slidably adapted with a slide, the top of the slide is fixedly connected to an insertion rope, the bottom of the slide is fixedly connected to a bottom rod, and the bottom rod is inserted into the bottom of the inner tube and extends into the interior thereof.

[0014] Preferably, the bottom of the bottom rod is fixedly connected to an annular seat, the interior of the annular seat is rotatably connected to a transition block through a ring shaft, the end of the transition block away from the annular seat is fixedly connected to a flow blocking plate, the top of the flow blocking plate is fixedly connected to a reset spring bar, the end of the reset spring bar away from the flow blocking plate is fixedly connected to the bottom of the inner tube, and the top of the flow blocking plate is extruded and adapted to the stamping rod.

[0015] Preferably, the bottom of the mesh belt is fixedly connected to a fixed seat, the interior of the fixed seat is rotatably connected to an adapter plate via a rotating shaft, the top of the adapter plate is fixedly connected to a reset spring, the top of the reset spring is fixedly connected to the top of the mesh belt, and the top of the adapter plate is fixedly connected to the insertion rope.

[0016] Preferably, the No. 2 feeding mechanism includes a No. 2 transmission roller, both ends of which are mounted on the frame through bearing seats, the outer side of the No. 2 transmission roller is transmission-connected to the No. 2 conveyor belt, the top of the inner cavity of the No. 2 conveyor belt is transmission-connected to the No. 2 support roller, and both ends of the No. 2 support roller are mounted on the frame through bearing seats.

[0017] Preferably, the air supply mechanism includes a base plate, which is fixedly mounted on the bottom of the frame, and a triangular plate and a square frame are fixedly mounted on the top of the base plate, wherein the triangular plate is arranged at the center of the top of the base plate, and the square frame is symmetrically arranged on both sides of the triangular plate.

[0018] Preferably, the top of the square frame and one side close to the triangle plate are provided with perforations, a blower is fixedly installed inside the square frame, a fixed rail is provided next to the blower, the fixed rail is fixedly connected to the bottom of the inner cavity of the square frame, and the inner sliding of the fixed rail is adapted with a sliding plate.

[0019] Preferably, the end of the fixed rail inner cavity away from the sliding disk is fixedly connected to a No. 2 magnet, the end of the No. 2 magnet away from the fixed rail is provided with a No. 1 magnet, the No. 1 magnet is fixedly connected to the outer side of the sliding disk, the outer side of the sliding disk is fixedly connected to an extension bar, the extension bar is slidably adapted on the outer side of the square frame, the end of the extension bar away from the sliding disk is fixedly connected to an interleaving plate, the interleaving plate is interleaved on the inner side of the closing plate and extends to the outside thereof.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When conveying tall and large sludge, reduce the intensity of the hot air drying on the surface to prevent rapid evaporation of surface moisture due to high temperatures, which can easily form a hard crust. For large, tall sludge, this hard crust can hinder the continued migration of internal moisture. This prevents the formation of a hard crust, reducing the channels for internal moisture to diffuse outward, making it difficult for internal moisture to reach the surface for evaporation.

[0022] 2. By starting the motor, the fan connected to its output end through the coupling will rotate, causing the heat generated by the hot water pan to be blown into the center frame by the fan. The top of the center frame is connected to the fixed pipe through the top plate, so the hot air will enter the fixed pipe and then be transmitted from the top to the No. 1 conveyor belt, thereby playing a preliminary drying role for the sludge.

[0023] 3. There are several inclined plates fixedly connected to the bottom of the top plate, and their lengths increase in a step-by-step manner, so that heat can enter the interiors of several fixed tubes instead of only transferring heat to one fixed tube.

[0024] 4. By extending the through-plate outward along the closed plate, the number of perforations becomes larger, thereby increasing the heat transfer outward when the wind force of the blower becomes stronger, and preventing excessive heat accumulation in the square frame, which not only reduces the impact on the hot air drying process of the sludge, but also reduces the heat dissipation effect of high heat on the blower. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the external structure of a hot air drying duct system for sludge drying according to the present invention.

[0026] Figure 2 It is a structural schematic diagram of the filter screen of the present invention.

[0027] Figure 3 It is a schematic diagram of the internal structure of the present invention as a whole.

[0028] Figure 4 This is a schematic structural diagram of the No. 1 feeding mechanism of the present invention.

[0029] Figure 5 This is a schematic diagram of the full cross-section structure of the No. 1 feeding mechanism of the present invention.

[0030] Figure 6 It is a schematic cross-sectional structural diagram of the air-drying mechanism of the present invention.

[0031] Figure 7 It is a schematic cross-sectional structural diagram of some components of the air-drying mechanism of the present invention.

[0032] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0033] Figure 9 It is a structural schematic diagram of the insertion rope of the present invention.

[0034] Figure 10 It is a schematic cross-sectional structural diagram of the remaining components of the air-drying mechanism of the present invention.

[0035] Figure 11 It is a schematic cross-sectional view of the second feeding mechanism of the present invention.

[0036] Figure 12 It is a schematic cross-sectional structural diagram of the air delivery mechanism of the present invention.

[0037] Figure 13 It is a schematic diagram of the longitudinal structure of some components of the air delivery mechanism of the present invention.

[0038] Figure 14 It is a schematic diagram of the vertical cross-section structure of some components of the air delivery mechanism of the present invention.

[0039] In the figure: 1, frame; 2, return pipe; 3, closing plate; 4, filter; 5, heat exchanger No. 1; 6, cold water tray; 7, heat exchanger No. 2; 8, hot water tray; 9, feeding mechanism No. 1; 10, air drying mechanism; 11, feeding mechanism No. 2; 12, air feeding mechanism; 91, feeding pipe; 92, mesh belt; 93, conveyor belt No. 1; 94, conveyor roller No. 1; 95, support roller No. 1; 96, traction plate; 101, center frame; 102, frame rod; 103, motor; 104, fan; 105, top plate; 106, inclined plate; 107, fixed pipe; 108, connecting strip; 109, inner pipe; 100 , slide plate; 1001, insertion rope; 1002, punching rod; 1003, bottom rod; 1004, annular seat; 1005, transition block; 1006, flow blocking plate; 1007, reset spring bar; 1008, adapter plate; 1009, fixed seat; 1000, reset spring; 111, No. 2 transmission roller; 112, No. 2 conveyor belt; 113, No. 2 support roller; 121, bottom plate; 122, triangle plate; 123, square frame; 124, perforation; 125, blower; 126, fixed track; 127, slide plate; 128, No. 1 magnet; 129, No. 2 magnet; 120, extension bar; 1201, insertion plate. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 14 , the present invention provides a technical solution: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a No. 1 feeding mechanism 9, which is used for preliminary transportation and treatment of sludge;

[0042] An air drying mechanism 10, which is used for rapid drying of sludge;

[0043] The second conveying mechanism 11 is used for secondary drying of the sludge and external output processing;

[0044] An air delivery mechanism 12, which is used for regulating and processing the secondary air drying of the sludge;

[0045] The outer sides of the No. 1 feeding mechanism 9, the air drying mechanism 10, the No. 2 feeding mechanism 11, and the air delivery mechanism 12 are all fixedly mounted with a frame 1. A return duct 2 is fixedly mounted on the top of the frame 1. A closing plate 3 and a filter screen 4 are connected to both sides of the frame 1. A hot water pan 8 is fixedly mounted on the side of the filter screen 4 away from the closing plate 3. A No. 2 heat exchanger 7 is fixedly mounted on the hot water pan 8. A cold water pan 6 is provided on the No. 2 heat exchanger 7. A No. 1 heat exchanger 5 is provided on the cold water pan 6. By starting the blower 125, the heat generated by the hot water pan 8 is fed into the square frame 123 by the blower 125. The hot air then passes through the perforations 124 and is transported along the triangular plate 122 to the No. 2 conveyor belt 112, thereby achieving secondary hot air drying of the sludge. The overall flow of the air duct system can be divided into two types: one is that hot air is transported to the second conveyor belt 112 by the blower 125, then the hot air floats upward and enters the first conveyor belt 93. The first conveyor belt 93 then passes through the filter 4 and enters the first heat exchanger 5. The hot air discharged from the first heat exchanger 5 enters the cold water tank 6 for cooling and dehydration. It then passes through the second heat exchanger 7 and enters the hot water tank 8 for heating. Finally, the hot air discharged from the hot water tank 8 is transported to the second conveyor belt 112 by the blower 125 again, and the cycle repeats. The other is that the motor 103 drives the fan 104 to rotate. At this time, the fan 104 draws the overflow or excess heat from the device into the first conveyor belt 93. The residual heat that floats on the top of the device cavity is then conducted by the mesh belt 92 until it is drawn back to the fan 104, and the cycle repeats.

[0046] The feeding mechanism No. 1 9 includes a feed pipe 91, and a mesh belt 92 is fixedly connected to the outside of the feed pipe 91. The feed pipe 91 and the mesh belt 92 are both fixedly connected to the top of the frame 1. A conveyor belt No. 1 93 is arranged below the feed pipe 91. Both sides of the inner cavity of the No. 1 conveyor belt 93 are transmission-connected to a No. 1 transmission roller 94. Both ends of the No. 1 transmission roller 94 are installed with bearing seats, and the bearing seats are fixedly installed on the frame 1. The top of the inner cavity of the No. 1 conveyor belt 93 is transmission-connected to a No. 1 support roller 95. Both ends of the No. 1 support roller 95 are installed on the frame 1 through bearing seats. A traction plate 96 is provided on the side of the No. 1 conveyor belt 93 away from the feed pipe 91, and the traction plate 96 is fixedly connected to the inner side of the frame 1. By transporting the sludge from the top of the feed pipe 91, and a No. 1 conveyor belt 93 is set just below the feed pipe 91, the sludge will fall onto the No. 1 conveyor belt 93. At this time, the external power equipment is started, causing the No. 1 transmission roller 94 to rotate, and the No. 1 conveyor belt 93 connected to the No. 1 transmission roller 94 will carry the sludge to the right. The sludge is not completely spread on the No. 1 conveyor belt 93, so the sludge is unevenly arranged on the No. 1 conveyor belt 93.

[0047] like Figure 6、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, the air-drying mechanism 10 includes a central frame 101, which is fixedly installed in the central part of the frame 1. The inner side of the central frame 101 is fixedly connected to a frame rod 102. The end of the frame rod 102 away from the central frame 101 is fixedly connected to a motor 103. The output end of the motor 103 is connected to a fan 104 through a coupling.

[0048] The top of the center frame 101 is fixedly connected to a top plate 105, and the bottom of the top plate 105 is fixedly connected to an inclined plate 106, wherein the number of inclined plates 106 is several and the lengths are different. A fixed pipe 107 is provided on the side of the inclined plate 106, and the fixed pipe 107 is fixedly connected to the bottom of the top plate 105. The inner side of the fixed pipe 107 is fixedly connected to a connecting strip 108. Then the motor 103 is started, causing the fan 104 connected to its output end through a coupling to rotate, causing the heat emitted by the hot water tray 8 to be blown into the center frame 101 by the fan 104, and the top of the center frame 101 is connected to the fixed pipe 107 through the top plate 105, so that the hot air will enter the fixed pipe 107, and then be transmitted from its top to the No. 1 conveyor belt 93, thereby playing a preliminary drying effect on the sludge. It is connected to a punching rod 1002, and the end of the connecting strip 108 away from the fixed tube 107 is fixedly connected to the inner tube 109. The inner tube 109 is slidably adapted with a slide plate 100. The top of the slide plate 100 is fixedly connected to the insertion rope 1001, and the bottom of the slide plate 100 is fixedly connected to the bottom rod 1003. The bottom rod 1003 is inserted into the bottom of the inner tube 109 and extends into the interior thereof. The bottom of the bottom rod 1003 is fixedly connected to an annular seat 1004, and the interior of the annular seat 1004 is rotatably connected to a transition block 1005 through a ring axis. The end of the transition block 1005 away from the annular seat 1004 is fixedly connected to a flow blocking plate 1006, and the top of the flow blocking plate 1006 is fixedly connected to a reset spring bar 1007. The end of the reset spring bar 1007 away from the flow blocking plate 1006 is fixedly connected to the bottom of the inner tube 109, and the top of the flow blocking plate 1006 is squeezed and adapted to the punching rod 1002. There are several inclined plates 106 fixedly connected to the bottom of the top plate 105 , and their lengths increase in a step-by-step manner, so that heat can enter the interiors of several fixed tubes 107 instead of only transferring heat to one fixed tube 107 .

[0049] The bottom of the mesh belt 92 is fixedly connected to a fixed seat 1009, the interior of the fixed seat 1009 is rotatably connected to an adapter plate 1008 via a rotating shaft, the top of the adapter plate 1008 is fixedly connected to a return spring 1000, the top of the return spring 1000 is fixedly connected to the top of the mesh belt 92, and the top of the adapter plate 1008 is fixedly connected to the insertion rope 1001. In addition, when the sludge with a higher height is transported on the No. 1 conveyor belt 93, it will collide and squeeze the transfer plate 1008, and the squeezed transfer plate 1008 will be deflected upward through the rotating shaft inside the fixed seat 1009 and compress the return spring 1000, wherein the return spring 1000 plays a role in resetting the transfer plate 1008. In addition, there is enough conveying space between the bottom end of the transfer plate 1008 and the No. 1 conveyor belt 93, and the top of the transfer plate 1008 is connected to the insertion rope 1001, and the other end of the insertion rope 1001 is connected to the slide plate 100, so the slide plate 100 will be affected by the insertion rope 1001. The bottom of the slide 100 is loosened and moves downward along the inner wall of the inner tube 109, wherein the bottom of the slide 100 is connected to the bottom rod 1003, and the bottom of the bottom rod 1003 is connected to the annular seat 1004, and the interior of the annular seat 1004 is rotatably connected to the transition block 1005 through the ring shaft, so the blocking plate 1006 connected to the other end of the transition block 1005 will move downward along with the bottom rod 1003. At this time, the punching rod 1002 that originally squeezed the top of the blocking plate 1006 will be relatively away from the blocking plate 1006, and then the blocking plate 1006 will gradually be in a horizontal state under the action of the reset spring bar 1007. The blocking plate 1006 is gradually in a horizontal state, causing the circulation space inside the fixed tube 107 to be reduced. Therefore, when the sludge with a high height and a large volume is being transported, the hot air drying strength on its surface is reduced, avoiding the rapid evaporation of water on the sludge surface due to high temperature drying, which easily forms a hard shell. For larger and taller sludge blocks, this hard shell will hinder the continued migration of internal moisture, thereby preventing the formation of a hard shell and reducing the channels for internal moisture to diffuse outward, making it difficult for internal moisture to reach the surface for evaporation.

[0050] like Figure 11 、 Figure 12 、 Figure 13 and Figure 14As shown, the No. 2 feeding mechanism 11 includes a No. 2 conveying roller 111. Both ends of the No. 2 conveying roller 111 are installed on the frame 1 through bearing seats. The outer side of the No. 2 conveying roller 111 is connected to the No. 2 conveyor belt 112. The sludge output from the tail of the No. 1 conveyor belt 93 will fall into the No. 2 conveyor belt 112 along the traction plate 96. Then, the external power equipment is started to cause the No. 2 conveying roller 111 to rotate, causing the No. 2 conveyor belt 112 connected to the outer side of the No. 2 conveyor belt to move to the left with the sludge. To transport it outward, the top of the inner cavity of the No. 2 conveyor belt 112 is connected to the No. 2 support roller 113. Both ends of the No. 2 support roller 113 are installed on the frame 1 through bearing seats. The air supply mechanism 12 includes a base plate 121, which is fixedly installed on the bottom of the frame 1. The top of the base plate 121 is fixedly installed with a triangular plate 122 and a square frame 123, wherein the triangular plate 122 is arranged at the center of the top of the base plate 121, and the square frame 123 is symmetrically arranged on both sides of the triangular plate 122.

[0051] The top of the square frame 123 and one side close to the triangular plate 122 are provided with through holes 124, and a blower 125 is fixedly installed inside the square frame 123, and a fixed rail 126 is provided next to the blower 125. The fixed rail 126 is fixedly connected to the bottom of the inner cavity of the square frame 123, and the inner sliding adaptation of the fixed rail 126 is equipped with a sliding disk 127. The end of the inner cavity of the fixed rail 126 away from the sliding disk 127 is fixedly connected to the second magnet 129, and the end of the second magnet 129 away from the fixed rail 126 is provided with the first magnet 128, and the first magnet 128 is fixedly connected to the outer side of the sliding disk 127. The outer side of the sliding disk 127 is fixedly connected to an extension bar 120, which is slidably adapted to the outer side of the square frame 123, and the end of the extension bar 120 away from the sliding disk 127 is fixedly connected to an interleaving plate 1201. The interleaving plate 1201 is inserted into the inner side of the closing plate 3 and extends to its outside. When the wind force of the blower 125 increases, the hot air will impact the sliding plate 127, and the impacted sliding plate 127 will move outward along the fixed rail 126. The fixed rail 126 has a second magnet 129 fixedly connected to it, and the sliding plate 127 is connected to the first magnet 128. At the same time, the two magnets repel each other, thereby resetting the sliding plate 127. In addition, the outer side of the sliding plate 127 is connected to the insertion plate 1201 through the extension bar 120. Therefore, the insertion plate 1201 will extend outward along the closing plate 3, causing the number of perforations 124 to increase. This will increase the heat transfer outward when the wind force of the blower 125 increases, while preventing excessive heat from accumulating in the square frame 123. This not only reduces the impact on the hot air drying process of the sludge, but also reduces the heat dissipation effect of the blower 125.

[0052] When the present invention is in use: first, the sludge is transported from the top of the feed pipe 91, and a No. 1 conveyor belt 93 is provided just below the feed pipe 91, so the sludge will fall onto the No. 1 conveyor belt 93, then the external power equipment is started, causing the No. 1 transmission roller 94 to rotate, and the No. 1 conveyor belt 93 connected to the No. 1 transmission roller 94 will carry the sludge to the right for transportation, wherein the No. 1 support roller 95 plays a role in stabilizing the support of the No. 1 conveyor belt 93, and the sludge is not completely spread on the No. 1 conveyor belt 93, and in the process of being transported on the No. 1 conveyor belt 93, the sludge will collide and squeeze the adapter plate 1008, and the squeezed adapter plate 1008 will be deflected upward through the rotating shaft inside the fixed seat 1009, and compress the return spring 1000, and the top of the adapter plate 1008 The bottom of the slide 100 is connected to the insertion rope 1001, and the other end of the insertion rope 1001 is connected to the slide 100, so the slide 100 will be loosened downward by the insertion rope 1001 and move downward along the inner wall of the inner tube 109, wherein the bottom of the slide 100 is connected to the bottom rod 1003, and the bottom of the bottom rod 1003 is connected to the annular seat 1004, and the interior of the annular seat 1004 is rotatably connected to the transition block 1005 through the ring shaft, so the blocking plate 1006 connected to the other end of the transition block 1005 will move downward with the bottom rod 1003. At this time, the stamping rod 1002 that originally squeezed the top of the blocking plate 1006 will move away from the blocking plate 1006, and then the blocking plate 1006 will gradually be in a horizontal state under the action of the reset spring bar 1007. By gradually horizontalizing the flow blocking plate 1006, the flow space inside the fixed pipe 107 will be reduced, and then the motor 103 will be started, causing the fan 104 connected to its output end through a coupling to rotate, so that the heat emitted by the hot water tray 8 will be blown into the center frame 101 by the fan 104. The top of the center frame 101 is connected to the fixed pipe 107 through the top plate 105, so the hot air will enter the fixed pipe 107, and then be transmitted from its top to the No. 1 conveyor belt 93 for preliminary drying treatment.

[0053] The sludge output from the tail of the No. 1 conveyor belt 93 will fall onto the No. 2 conveyor belt 112 along the traction plate 96, and then the external power equipment will be started, causing the No. 2 transmission roller 111 to rotate, causing the No. 2 conveyor belt 112 connected to its outer side to move to the left with the sludge until it is transported out.

[0054] By starting the blower 125, the heat generated by the hot water pan 8 will be sent into the square frame 123 by the blower 125, and then the hot air will pass through the perforation 124 and be transported along the triangular plate 122 to the second conveyor belt 112, thereby achieving a secondary hot air drying treatment for the sludge. The overall process of the air duct system is divided into two types: one is that the hot air is transported to the second conveyor belt 112 by the blower 125, and then the hot air will float upward and enter the first conveyor belt 93, and then the first conveyor belt 93 will pass through the filter 4 and enter the first heat exchanger 5. The hot air discharged from the first heat exchanger 5 will enter the cold water pan 6 for cooling and dehydration treatment, and then pass through the second heat exchanger 7 to enter the hot water pan 8 for heating treatment. Finally, the high-temperature hot air discharged from the hot water pan 8 will be transported to the second conveyor belt 112 by the blower 125 again, and the cycle will repeat. The other is: the motor 103 drives the fan 104 to rotate, and at this time the fan 104 will introduce the overflow or excess heat inside the device to the No. 1 conveyor belt 93, and then the residual heat floating on the top of the inner cavity of the device will be conducted by the mesh belt 92 until it is introduced into the fan 104 again, and the cycle repeats.

[0055] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Various changes made by ordinary technicians in this field based on the above concepts without creative work fall within the scope of protection of the present invention.

Claims

1. A hot air drying duct system for sludge drying, characterized in that: include: The first feeding mechanism (9) is used for the preliminary transportation and treatment of the sludge; An air drying mechanism (10) is used for rapid drying of the sludge; The second feeding mechanism (11) is used for secondary drying of the sludge and external output processing; An air conveying mechanism (12) is used for regulating and treating the secondary air drying of the sludge; The No. 1 feeding mechanism (9), the air drying mechanism (10), the No. 2 feeding mechanism (11) and the air delivery mechanism (12) are all mounted on the frame (1); a return pipe (2) is fixedly mounted on the top of the frame (1); a closing plate (3) and a filter (4) are connected to both sides of the frame (1); a hot water pan (8) is fixedly mounted on the side of the filter (4) away from the closing plate (3); a No. 2 heat exchanger (7) is fixedly mounted on the hot water pan (8); a cold water pan (6) is arranged on the No. 2 heat exchanger (7); and a No. 1 heat exchanger (5) is arranged on the cold water pan (6); The No. 1 feeding mechanism (9) includes a feed pipe (91), the outer side of the feed pipe (91) is fixedly connected to a mesh belt (92), the feed pipe (91) and the mesh belt (92) are both fixedly connected to the top of the frame (1), a No. 1 conveyor belt (93) is provided below the feed pipe (91), both sides of the inner cavity of the No. 1 conveyor belt (93) are driven and connected to a No. 1 transmission roller (94), both ends of the No. 1 transmission roller (94) are installed on the frame (1) through bearing seats, the top of the inner cavity of the No. 1 conveyor belt (93) is driven and connected to a No. 1 support roller (95), both ends of the No. 1 support roller (95) are installed on the frame (1) through bearing seats, a traction plate (96) is provided on the side of the No. 1 conveyor belt (93) away from the feed pipe (91), and the traction plate (96) is fixedly connected to the inner side of the frame (1); The air-drying mechanism (10) comprises a central frame (101), the central frame (101) being fixedly mounted on the central portion of the frame body (1), the inner side of the central frame (101) being fixedly connected to a frame rod (102), one end of the frame rod (102) away from the central frame (101) being fixedly connected to a motor (103), and the output end of the motor (103) being connected to a fan (104) via a coupling; The top of the center frame (101) is fixedly connected to a top plate (105), and the bottom of the top plate (105) is fixedly connected to an inclined plate (106), wherein the number of inclined plates (106) is several and the lengths are different. A fixed tube (107) is provided on the side of the inclined plate (106), and the fixed tube (107) is fixedly connected to the bottom of the top plate (105). The inner side of the fixed tube (107) is fixedly connected to a connecting strip (108), and the bottom of the connecting strip (108) is fixedly connected to a punching rod (1002); One end of the connecting strip (108) away from the fixed tube (107) is fixedly connected to the inner tube (109); the inner tube (109) is slidably adapted to be fitted with a slide plate (100); the top of the slide plate (100) is fixedly connected to a threading rope (1001); the bottom of the slide plate (100) is fixedly connected to a bottom rod (1003); the bottom rod (1003) is inserted through the bottom of the inner tube (109) and extends into the interior thereof; The bottom of the bottom rod (1003) is fixedly connected to an annular seat (1004), the interior of the annular seat (1004) is rotatably connected to a transition block (1005) via a ring shaft, the end of the transition block (1005) away from the annular seat (1004) is fixedly connected to a flow blocking plate (1006), the top of the flow blocking plate (1006) is fixedly connected to a reset spring bar (1007), the end of the reset spring bar (1007) away from the flow blocking plate (1006) is fixedly connected to the bottom of the inner tube (109), and the top of the flow blocking plate (1006) is extruded and adapted to the punching rod (1002); The bottom of the mesh belt (92) is fixedly connected to a fixing seat (1009), the interior of the fixing seat (1009) is rotatably connected to an adapter plate (1008) via a rotating shaft, the top of the adapter plate (1008) is fixedly connected to a return spring (1000), the top of the return spring (1000) is fixedly connected to the top of the mesh belt (92), and the top of the adapter plate (1008) is fixedly connected to the insertion rope (1001).

2. The hot air drying duct system for sludge drying according to claim 1, characterized in that: The No. 2 feeding mechanism (11) comprises a No. 2 transmission roller (111), both ends of the No. 2 transmission roller (111) are mounted on the frame (1) via bearing seats, the outer side of the No. 2 transmission roller (111) is connected to the No. 2 conveyor belt (112) via transmission, the top of the inner cavity of the No. 2 conveyor belt (112) is connected to the No. 2 support roller (113) via transmission, and both ends of the No. 2 support roller (113) are mounted on the frame (1) via bearing seats.

3. The hot air drying duct system for sludge drying according to claim 1, characterized in that: The air delivery mechanism (12) includes a bottom plate (121), the bottom plate (121) is fixedly mounted on the bottom of the frame (1), and a triangular plate (122) and a square frame (123) are fixedly mounted on the top of the bottom plate (121), wherein the triangular plate (122) is arranged at the center of the top of the bottom plate (121), and the square frame (123) is symmetrically arranged on both sides of the triangular plate (122).

4. The hot air drying duct system for sludge drying according to claim 3, characterized in that: The top of the square frame (123) and one side close to the triangular plate (122) are both provided with a perforation (124). A blower (125) is fixedly installed inside the square frame (123). A fixed rail (126) is provided beside the blower (125). The fixed rail (126) is fixedly connected to the bottom of the inner cavity of the square frame (123). The interior of the fixed rail (126) is slidably adapted to be equipped with a sliding plate (127).

5. The hot air drying duct system for sludge drying according to claim 4, characterized in that: The end of the inner cavity of the fixed rail (126) away from the sliding disk (127) is fixedly connected to a second magnet (129), and the end of the second magnet (129) away from the fixed rail (126) is provided with a first magnet (128), and the first magnet (128) is fixedly connected to the outside of the sliding disk (127). The outside of the sliding disk (127) is fixedly connected to an extension bar (120), and the extension bar (120) is slidably adapted on the outside of the square frame (123). The end of the extension bar (120) away from the sliding disk (127) is fixedly connected to an insertion plate (1201), and the insertion plate (1201) is inserted into the inner side of the closing plate (3) and extends to the outside thereof.

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