Hot air drying air duct system for sludge drying

Abstract

The invention relates to the field of hot air drying, in particular to a hot air drying air duct system for sludge drying, which comprises a first conveying mechanism used for preliminary conveying treatment of sludge; the air drying mechanism is used for quickly drying the sludge; the second conveying mechanism is used for carrying out secondary drying and outward output treatment on the sludge; the air conveying mechanism is used for regulating and controlling secondary air drying of the sludge; the outer sides of the first conveying mechanism, the air drying mechanism, the second conveying mechanism and the air conveying mechanism are fixedly provided with frame bodies, and the tops of the frame bodies are fixedly provided with backflow pipelines. According to the hot air drying air duct system for sludge drying, in the conveying process of high and large-size sludge, the hot air drying strength on the surface of the sludge is reduced, and the drying efficiency of the sludge is improved; rapid evaporation of moisture on the surface of the sludge due to high-temperature drying is avoided, and a layer of hard shell is easy to form.

Description

Technical Field

[0001] The invention relates to the technical field of hot air drying, in particular to a hot air drying air 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 strengthens the heat and mass transfer process and is widely used in the drying unit operation of bulk granular materials.

[0003] The existing hot air drying duct system for sludge drying has the following problems: 1. For large and high sludge, this hard shell will hinder the continued migration of internal moisture. The formation of the hard shell reduces the channels for internal moisture to diffuse outward, and it is difficult for the internal moisture to reach the surface for evaporation; 2. The hot air drying intensity of the sludge is always consistent, resulting in excessive drying of part of the sludge, while the moisture in the other part of the sludge has not yet evaporated. 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 sludge; An air drying mechanism, which is used for rapid drying of sludge; A second conveying mechanism, which is used for secondary drying of the sludge and external output processing; An air conveying mechanism, which is used for regulating and controlling the secondary air drying of the sludge; The outer sides of the No. 1 feeding mechanism, the air-drying mechanism, the No. 2 feeding mechanism and the air-conveying mechanism are all fixedly installed with a frame, the top of the frame is fixedly installed with a return pipe, the two sides of the frame are respectively connected with a closing plate and a filter screen, a hot water pan is fixedly installed on the side of the filter screen away from the closing plate, a No. 2 heat exchanger is fixedly installed on the hot water pan, a cold water pan is arranged on the No. 2 heat exchanger, and a No. 1 heat exchanger is arranged on the cold water pan; The No. 1 feeding mechanism includes a feed pipe, the outer side of the feed pipe is fixedly connected with 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 drivingly 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 drivingly 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 arranged 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.

[0006] Preferably, the air-drying mechanism includes a center frame, which is fixedly installed in the central part of the frame, and a frame rod is fixedly connected to the inner side of the center frame. The end of the frame rod away from the center frame is fixedly connected to a motor, and the output end of the motor is connected to a fan through a coupling.

[0007] Preferably, the top of the center frame is fixedly connected to a top plate, the bottom of the top plate is fixedly connected to an inclined plate, wherein the number of the inclined plates is several and the lengths are different, a fixed tube is provided on the side of the inclined plate, the fixed tube is fixedly connected to the bottom of the top plate, a connecting strip is fixedly connected to the inner side of the fixed tube, and a stamping rod is fixedly connected to the bottom of the connecting strip.

[0008] Preferably, one 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 plate, the top of the slide plate is fixedly connected to an insertion rope, the bottom of the slide plate 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.

[0009] Preferably, the bottom of the bottom rod is fixedly connected with an annular seat, the interior of the annular seat is rotatably connected with a transition block through a ring shaft, the end of the transition block away from the annular seat is fixedly connected with a flow blocking plate, the top of the flow blocking plate is fixedly connected with 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.

[0010] 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 return spring, the top of the return 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Preferably, a second magnet is fixedly connected to one end of the rail fixing inner cavity away from the sliding disk, a first magnet is arranged at one end of the second magnet away from the rail fixing, the first magnet is fixedly connected to the outer side of the sliding disk, an extension bar is fixedly connected to the outer side of the sliding disk, the extension bar is slidably adapted to the outer side of the square frame, an insertion plate is fixedly connected to one end of the extension bar away from the sliding disk, the insertion plate is inserted into the inner side of the closing plate and extends to the outside thereof.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the sludge with a high height and a large volume is being transported, the intensity of hot air drying on its surface should be reduced to avoid the rapid evaporation of the water on the sludge surface due to high temperature drying, which easily forms a hard shell. For the sludge with large pieces and a high height, this hard shell will hinder the continued migration of the internal water. This will prevent the formation of a hard shell, reduce the channels for the internal water to diffuse outward, and make it difficult for the internal water to reach the surface for evaporation.

[0016] 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 achieving preliminary drying of the sludge.

[0017] 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 transporting heat to one fixed tube.

[0018] 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 avoiding excessive heat accumulation in the square frame, which not only reduces the impact on the hot air drying of the sludge, but also reduces the heat dissipation effect of the high heat on the blower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 2 It is a schematic diagram of the structure of the filter screen of the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the present invention as a whole.

[0022] Figure 4 It is a structural schematic diagram of the No. 1 feeding mechanism of the present invention.

[0023] Figure 5 This is a schematic diagram of the full cross-section structure of the No. 1 feeding mechanism of the present invention.

[0024] Figure 6 It is a schematic cross-sectional structural diagram of the air-drying mechanism of the present invention.

[0025] Figure 7 It is a schematic cross-sectional structural diagram of some components of the air-drying mechanism of the present invention.

[0026] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0027] Fig. 9 It is a structural schematic diagram of the insertion rope of the present invention.

[0028] Fig.10 It is a schematic cross-sectional structural diagram of the remaining components of the air-drying mechanism of the present invention.

[0029] Fig.11 It is a schematic cross-sectional structural diagram of the No. 2 feeding mechanism of the present invention.

[0030] Fig.12 It is a schematic cross-sectional structural diagram of the air delivery mechanism of the present invention.

[0031] Fig.13 It is a schematic diagram of the longitudinal section structure of some components of the air delivery mechanism of the present invention.

[0032] Fig.14 It is a schematic diagram of the vertical section structure of some components of the air delivery mechanism of the present invention.

[0033] In the figure: 1, frame; 2, return pipe; 3, closing plate; 4, filter screen; 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, transmission 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, interlaced 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, triangular plate; 123, square frame; 124, perforation; 125, air blower; 126, fixed track; 127, sliding plate; 128, No. 1 magnet; 129, No. 2 magnet; 120, extension strip; 1201, interlaced plate. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. 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.

[0035] 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 feeding and processing of sludge; An air drying mechanism 10, which is used for rapid drying of sludge; A second conveying mechanism 11, which is used for secondary drying of the sludge and external output processing; An air delivery mechanism 12, the air delivery mechanism 12 is used for regulating and processing the secondary air drying of the sludge; 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 installed with a frame 1, the top of the frame 1 is fixedly installed with a return pipe 2, the two sides of the frame 1 are respectively connected with a closing plate 3 and a filter screen 4, the side of the filter screen 4 away from the closing plate 3 is fixedly installed with a hot water pan 8, the No. 2 heat exchanger 7 is fixedly installed on the hot water pan 8, the No. 2 heat exchanger 7 is provided with a cold water pan 6, and the No. 1 heat exchanger 5 is provided on the cold water pan 6. By starting the air blower 125, the heat generated by the hot water pan 8 will be sent into the square frame 123 by the air blower 125, and then the hot air will pass through the perforation 124 and be transported to the No. 2 conveyor belt 112 along the triangular plate 122, so as to realize the secondary hot air drying treatment of 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 No. 2 conveyor belt 112 through the blower 125, and then the hot air will float upward and enter the No. 1 conveyor belt 93, and then the No. 1 conveyor belt 93 will pass through the filter 4 and enter the No. 1 heat exchanger 5, and the hot air discharged from the No. 1 heat exchanger 5 will enter the cold water tray 6 for cooling and water removal, and then enter the hot water tray 8 through the No. 2 heat exchanger 7 for heating, and finally the high-temperature hot air discharged from the hot water tray 8 will be transported to the No. 2 conveyor belt 112 by the blower 125 again, and the cycle will be repeated. The other is that 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 to the fan 104 again, and the cycle will be repeated.

[0036] The No. 1 feeding mechanism 9 includes a feed pipe 91, the outer side of the feed pipe 91 is fixedly connected with 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 arranged below the feed pipe 91, both sides of the inner cavity of the No. 1 conveyor belt 93 are drivingly 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 drivingly 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, and a traction plate 96 is arranged 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 sludge is transported from the top of the feed pipe 91, and a conveyor belt No. 1 93 is set just below the feed pipe 91, so the sludge will fall onto the conveyor belt No. 1 93. At this time, the external power equipment is started, causing the transmission roller No. 1 94 to rotate, and the conveyor belt No. 1 93 connected to the transmission roller No. 1 94 will move to the right with the sludge. The sludge is not completely spread on the conveyor belt No. 1 93, so the sludge is unevenly arranged on the conveyor belt No. 1 93.

[0037] like Figure 6, Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the air-drying mechanism 10 includes a center frame 101, which is fixedly installed in the central part of the frame body 1. A rack rod 102 is fixedly connected to the inner side of the center frame 101. An end of the rack rod 102 away from the center 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.

[0038] The top of the central 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 arranged 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, so that the fan 104 connected to its output end through a coupling will rotate, so that the heat emitted by the hot water tray 8 will be blown into the central frame 101 by the fan 104, and the top of the central 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 the top thereof to the No. 1 conveyor belt 93, thereby playing a preliminary drying effect on the sludge. The bottom of the connecting strip 108 is fixedly connected to It is connected to a stamping 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 an insertion rope 1001, the bottom of the slide plate 100 is fixedly connected to a 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, the interior of the annular seat 1004 is rotatably connected with a transition block 1005, 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 with the stamping rod 1002. There are several inclined plates 106 fixedly connected to the bottom of the top plate 105 , and the lengths thereof are increased in a step-by-step manner, so that heat can enter the interiors of several fixed tubes 107 instead of transferring heat to only one fixed tube 107 .

[0039] 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 high 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 plate 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 inside of the annular seat 1004 is 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 punching rod 1002 that originally squeezed the top of the blocking plate 1006 will be relatively far 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, so that the circulation space inside the fixed pipe 107 will 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 to avoid the rapid evaporation of the water on the sludge surface due to high temperature drying, which is easy to form a hard shell. For larger and taller sludge, this hard shell will hinder the continued migration of internal water, thereby preventing the formation of a hard shell and reducing the channels for internal water to diffuse outward, making it difficult for internal water to reach the surface for evaporation.

[0040] like Fig.11 , Fig.12 , Fig.13 and Fig.14As shown, the No. 2 feeding mechanism 11 includes a No. 2 transmission roller 111, both ends of which are installed on the frame 1 through bearing seats, and the outer side of the No. 2 transmission roller 111 is connected to the No. 2 conveyor belt 112, and 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 is started, causing the No. 2 transmission roller 111 to rotate, so that the No. 2 conveyor belt 112 connected to the outer side of the No. 2 transmission roller 111 will move to the left with the sludge, until 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 for transmission. 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, and the base plate 121 is fixedly installed at the bottom of the frame 1. The top of the base plate 121 is respectively 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.

[0041] The top of the square frame 123 and one side close to the triangular plate 122 are provided with through holes 124, a blower 125 is fixedly installed inside the square frame 123, a fixed rail 126 is arranged beside the blower 125, the fixed rail 126 is fixedly connected to the bottom of the inner cavity of the square frame 123, the inner sliding adaptor of the fixed rail 126 is equipped with a sliding plate 127, a second magnet 129 is fixedly connected to the end of the inner cavity of the fixed rail 126 away from the sliding plate 127, a first magnet 128 is arranged at the end of the second magnet 129 away from the fixed rail 126, the first magnet 128 is fixedly connected to the outer side of the sliding plate 127, an extension bar 120 is fixedly connected to the outer side of the sliding plate 127, the extension bar 120 is slidably adapted to the outer side of the square frame 123, the extension bar 120 is fixedly connected to the end away from the sliding plate 127 with an interleaving plate 1201, the interleaving plate 1201 is interleaved with the inner side of the closing plate 3 and extends to the outside thereof. 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, wherein the fixed rail 126 is fixedly connected with the second magnet 129 inside, and the sliding plate 127 is connected with the first magnet 128, and the two magnets are mutually repelled, thereby playing a role in 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, so the insertion plate 1201 will extend outward along the closing plate 3, causing the number of perforations 124 to increase, thereby playing a role in increasing the outward transmission of heat when the wind force of the blower 125 increases, and at the same time avoiding excessive accumulation of heat in the square frame 123, which not only reduces the impact on the hot air drying of the sludge, but also reduces the heat dissipation effect of the high heat on the blower 125.

[0042] 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 arranged just below the feed pipe 91, so the sludge will fall on 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 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, and the top of the transfer 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 plate 100, so the slide plate 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 plate 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 a ring shaft, so the flow 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 flow blocking plate 1006 will move away from the flow blocking plate 1006, and then the flow blocking plate 1006 will gradually be in a horizontal state under the action of the reset spring bar 1007. The flow blocking plate 1006 is gradually in a horizontal state, so that the flow space inside the fixed pipe 107 will be reduced, and then the motor 103 is started, so that the fan 104 connected to its output end through a coupling will rotate, so that the heat generated 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 the top to the No. 1 conveyor belt 93 for preliminary drying treatment.

[0043] The sludge discharged 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 to cause the No. 2 transmission roller 111 to rotate, causing the No. 2 conveyor belt 112 connected to the outer side to move to the left with the sludge until it is transported out.

[0044] 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 to the No. 2 conveyor belt 112 along the triangular plate 122 to achieve the secondary hot air drying treatment of 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 No. 2 conveyor belt 112 by the blower 125, and then the hot air will float upward and enter the No. 1 conveyor belt 93, and then the No. 1 conveyor belt 93 will pass through the filter screen 4 and enter the No. 1 heat exchanger 5, and the hot air discharged from the No. 1 heat exchanger 5 will enter the cold water pan 6 for cooling and dehydration treatment, and then enter the hot water pan 8 through the No. 2 heat exchanger 7 for heating treatment, and finally the high-temperature hot air discharged from the hot water pan 8 will be transported to the No. 2 conveyor belt 112 by the blower 125 again, and the cycle will be repeated. The other is: the motor 103 drives the fan 104 to rotate, and then 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 to the fan 104 again, and the cycle repeats.

[0045] The above-mentioned 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-mentioned concepts without creative work all 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: A first conveying mechanism (9), used for preliminary conveying and processing of sludge; An air drying mechanism (10) is used for quickly drying 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 controlling the secondary air drying of the sludge; The first feeding mechanism (9), the air drying mechanism (10), the second feeding mechanism (11) and the air delivery mechanism (12) are all mounted on a frame (1); a return pipe (2) is fixedly mounted on the top of the frame (1); a closing plate (3) and a filter screen (4) are respectively connected to two 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 second heat exchanger (7) is fixedly mounted on the hot water pan (8); a cold water pan (6) is arranged on the second heat exchanger (7); and a first heat exchanger (5) is arranged on the cold water pan (6); The No. 1 feeding mechanism (9) comprises 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 arranged below the feed pipe (91), both sides of the inner cavity of the No. 1 conveyor belt (93) are drivingly connected to a No. 1 transmission roller (94), both ends of the No. 1 transmission roller (94) are mounted on the frame (1) via bearing seats, the top of the inner cavity of the No. 1 conveyor belt (93) is drivingly connected to a No. 1 support roller (95), both ends of the No. 1 support roller (95) are mounted on the frame (1) via bearing seats, and a traction plate (96) is arranged 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).

2. A hot air drying duct system for sludge drying according to claim 1, characterized in that: The air-drying mechanism (10) comprises a central frame (101), the central frame (101) being fixedly mounted at the central part 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.

3. A hot air drying duct system for sludge drying according to claim 2, characterized in that: The top of the central 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 multiple and the lengths are different. A fixed tube (107) is arranged on the side of the inclined plate (106), and the fixed tube (107) is fixedly connected to the bottom of the top plate (105). A connecting strip (108) is fixedly connected to the inner side of the fixed tube (107), and a punching rod (1002) is fixedly connected to the bottom of the connecting strip (108).

4. The hot air drying duct system for sludge drying according to claim 3 is characterized in that: 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 provided with a slide plate (100); the top of the slide plate (100) is fixedly connected to an insertion rope (1001); the bottom of the slide plate (100) is fixedly connected to a bottom rod (1003); the bottom rod (1003) is inserted into the bottom of the inner tube (109) and extends into the interior thereof.

5. The hot air drying duct system for sludge drying according to claim 4, characterized in that: 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, one 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), one 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).

6. The hot air drying duct system for sludge drying according to claim 1, characterized in that: 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).

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

8. The hot air drying duct system for sludge drying according to claim 1, characterized in that: The air delivery mechanism (12) comprises a bottom plate (121), the bottom plate (121) being fixedly mounted on the bottom of the frame (1), and a triangular plate (122) and a square frame (123) being 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).

9. A hot air drying duct system for sludge drying according to claim 8, characterized in that: The top of the square frame (123) and a side close to the triangular plate (122) are provided with a perforation (124); a blower (125) is fixedly installed inside the square frame (123); a fixed rail (126) is arranged beside the blower (125); the fixed rail (126) is fixedly connected to the bottom of the inner cavity of the square frame (123); and a sliding plate (127) is slidably adapted inside the fixed rail (126).

10. A hot air drying duct system for sludge drying according to claim 9, characterized in that: A second magnet (129) is fixedly connected to one end of the inner cavity of the fixed rail (126) away from the sliding disk (127); a first magnet (128) is arranged at one end of the second magnet (129) away from the fixed rail (126); the first magnet (128) is fixedly connected to the outer side of the sliding disk (127); an extension bar (120) is fixedly connected to the outer side of the sliding disk (127); the extension bar (120) is slidably adapted to the outer side of the square frame (123); an insertion plate (1201) is fixedly connected to one end of the extension bar (120) away from the sliding disk (127); 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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