An MVR waste drying system

Abstract

The present application relates to the technical field of sludge treatment and provides an MVR sewage drying system, which includes: a material closed silo, the upper end of the material closed silo is provided with a material inlet, and the lower end of the material closed silo is provided with a material outlet; at least one group of heat exchange tube groups, the heat exchange tube group includes a multi-layer heat exchange pipe inside the material closed silo, the upper surface of the heat exchange pipe is used to support the material to be dried, the multi-layer heat exchange pipe is sequentially connected from top to bottom into a continuous pipeline, the continuous pipeline has a steam inlet and a steam outlet, and the steam outlet leads to the outside of the material closed silo; a steam compressor, the air inlet of the steam compressor is connected to the inside of the material closed silo, and the air outlet of the steam compressor is connected to the steam inlet of the continuous pipeline; an internal turbulence fan, the air inlet and air outlet of the internal turbulence fan both lead to the inside of the material closed silo. The MVR sewage drying system can improve the sewage drying efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of sludge treatment, and more specifically, to an MVR sewage drying system. Background Art

[0002] Mechanical vapor recompression (MVR) is a recently developed energy-saving technology. In an MVR system, secondary steam generated by the evaporator is drawn into a compressor and compressed, raising its temperature and pressure. This compressed steam is then returned to the evaporator, where it continues to function as a heat source in the evaporation process. Through this cyclical process, the evaporation process, which previously required significant energy consumption, now relies on this recycled steam, significantly reducing energy consumption. This technology has been widely used in the evaporation and concentration of liquids.

[0003] Chinese patent application number 202411585927.6 discloses a closed MVR sludge drying device, which records the technology of using MVR for sludge drying in the prior art. This prior art has the following defects: during the material (sludge) drying process, due to the large contact thermal resistance of the material, the heat transfer from the steam pipe to the material to be dried is seriously affected, resulting in low material drying efficiency and high energy consumption. Summary of the Invention

[0004] In view of this, the present application provides an MVR sewage drying system to solve the technical problems of low drying efficiency and high energy consumption of the MVR sludge drying device in the prior art.

[0005] The present application provides an MVR waste drying system, which includes:

[0006] A material closed bin body, wherein the upper end of the material closed bin body has a material inlet, and the lower end of the material closed bin body has a material outlet;

[0007] At least one heat exchange tube group, the heat exchange tube group including multiple layers of heat exchange pipes inside the material closed silo, the upper surface of the heat exchange pipes is used to support the material to be dried, the multiple layers of heat exchange pipes are sequentially connected from top to bottom to form a continuous pipeline, the continuous pipeline has a steam inlet and a steam outlet, and the steam outlet leads to the outside of the material closed silo;

[0008] a steam compressor, wherein the air inlet of the steam compressor is connected to the interior of the material closed bin, and the air outlet of the steam compressor is connected to the steam inlet of the continuous pipeline;

[0009] An internal turbulence fan, wherein the air inlet and the air outlet of the internal turbulence fan are both led to the interior of the material closed warehouse.

[0010] Furthermore, the MVR waste drying system includes a first internal turbulence ejection pipe arranged in the material closed bin body, the length direction of the first internal turbulence ejection pipe is arranged along the length direction of the material closed bin body, the air outlet of the internal turbulence fan is connected to the first internal turbulence ejection pipe, and the first internal turbulence ejection pipe has a plurality of internal turbulence output holes arranged at intervals along its length direction.

[0011] Furthermore, a first internal turbulence outlet pipe is arranged on the upper side of each of the heat exchange pipes, and the air outlet of the internal turbulence fan is connected to air outlet branch pipes corresponding to the number of the first internal turbulence outlet pipes, and each air outlet branch pipe is connected to each of the first internal turbulence outlet pipes one by one, and the internal turbulence output hole on each of the first internal turbulence outlet pipes faces directly above the corresponding heat exchange pipe.

[0012] Furthermore, a second inner turbulence outlet pipe is arranged on the upper side of each of the heat exchange pipes, and the second inner turbulence outlet pipe has a plurality of inner turbulence output holes arranged at intervals along its length direction. The second inner turbulence outlet pipe is connected to the corresponding first inner turbulence outlet pipe through a transverse connecting pipe, and the inner turbulence output hole on each of the second inner turbulence outlet pipes faces directly above the corresponding heat exchange pipe.

[0013] Furthermore, a far-infrared coating is provided below each of the heat exchange pipes.

[0014] Furthermore, the top of the material closed silo has a silo air outlet, the air inlet of the steam compressor is connected to the silo air outlet through the compressor input pipe, and the air outlet of the steam compressor is connected to the topmost heat exchange pipe in each group of heat exchange tube groups through the compressor output pipe.

[0015] Furthermore, the heat exchange pipe includes a plurality of row pipes arranged along the width direction of the material closed warehouse, and the row pipes of the multiple layers of heat exchange pipes are connected in sequence from top to bottom. The air outlet of the steam compressor is connected to each row pipe in the topmost layer of the heat exchange pipe in each group of heat exchange pipes through the compressor output pipe.

[0016] Furthermore, the MVR waste drying system includes a first transverse tube and a second transverse tube arranged in the material closed bin body, the first transverse tube and the second transverse tube both extend along the width direction of the material closed bin body and are connected to each other, the second transverse tube is connected to each row tube in the topmost heat exchange pipe in each group of heat exchange tube groups, and the air outlet of the compressor output pipe is connected to the first transverse tube and the second transverse tube respectively through the compressor output pipe.

[0017] Furthermore, one side of the second transverse pipe is connected to each row of pipes through a plurality of first guide holes, and the plurality of first guide holes corresponds to the number of the plurality of row of pipes connected to the second transverse pipe. The other side of the second transverse pipe is connected to the first transverse pipe through a plurality of second guide holes, and the number and position of the second guide holes correspond one-to-one to the plurality of first guide holes, and the aperture of the second guide hole is larger than the aperture of the corresponding first guide hole, and the position of the hole center of the second guide hole is lower than the position of the hole center of the first guide hole.

[0018] Furthermore, the MVR waste drying system also includes a plurality of layers of material pushing mechanisms arranged in sequence from top to bottom inside the material closed bin body, and each of the material pushing mechanisms is located one by one above each of the heat exchange pipes. The material entering the material closed bin body from the material inlet can be pushed by the material pushing mechanisms of each layer and pass through the upper surface of each layer of the heat exchange pipe from top to bottom to reach the material outlet.

[0019] The beneficial effects of the MVR waste drying system provided in this application are:

[0020] The MVR waste drying system provided by the present application is characterized by, on the one hand, a steam compressor injects compressed steam into the steam inlet of the continuous pipeline. The compressed steam then flows through the continuous pipeline to exchange heat with the material supported by the upper surface of each heat exchange pipe. The enclosed environment of the material enclosed silo itself serves as an entire moisture evaporation chamber. The evaporated steam then returns to the steam compressor through the air inlet and is compressed again and output to the heat exchange pipe, thereby achieving continuous and efficient drying of the material. The latent heat of steam can be repeatedly utilized to dry the material, which significantly saves energy compared to technologies such as direct electric heating for material drying. On the other hand, the air inlet and air outlet of the internal turbulence fan both lead to the interior of the material enclosed silo. When the internal turbulence fan is activated, the steam generated during the material drying process can be forced to undergo thermal convection within the material enclosed silo. Heat from the lower surface of the steam pipe can be quickly transferred to the material through steam convection, thereby providing a heat transfer pathway between the heat exchange pipe and the material, which is beneficial to moisture evaporation of the material.

[0021] In a further solution, a far-infrared coating is provided under each of the heat exchange pipes. The far-infrared coating under each layer of heat exchange pipe forms thermal radiation to the material to be dried supported by the lower layer of heat exchange pipe, and fully utilizes the heat of the upper layer of heat exchange pipe to perform thermal radiation heating on the material supported by the lower layer of heat exchange pipe, thereby improving the energy utilization rate of compressed steam and further improving the drying efficiency of the material in the closed material bin.

[0022] In a further solution, the material pushing mechanism can push and flip the material, reducing thermal resistance, accelerating heat conduction between the heat exchange pipe and the supporting material, and further improving the drying efficiency of the material.

[0023] In summary, although there is a technology in the prior art that dries materials by passing steam into a steam pipe to exchange heat with the material, the heat exchange method between the steam pipe and the material to be dried in the prior art is heat conduction. During the heat conduction process, the material will produce a very strong contact thermal resistance, which seriously affects the transfer of heat through the steam pipe to the material to be dried. The present invention uses an internal turbulence fan to perform forced heat convection on the material drying process in the closed material bin, that is, the present invention changes the traditional heat exchange method between the steam pipe and the material from "heat conduction" to "heat convection". The heat exchange efficiency of heat convection itself is much higher than that of heat conduction. Combined with the heat radiation generated by the far-infrared coating, the heat exchange efficiency between the steam pipe and the material to be dried is further improved. Therefore, compared with the steam pipe and the material to be dried using only the traditional heat conduction heat exchange method, the heat exchange efficiency between the steam pipe and the material to be dried is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A three-dimensional schematic diagram of an MVR waste drying system provided in one embodiment of the present application;

[0026] Figure 2 A side view of the internal structure of an MVR waste drying system provided in accordance with one embodiment of the present application;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 A partial perspective view of some components of an MVR waste drying system provided in one embodiment of the present application;

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 A schematic perspective view of a partial structure of an MVR waste drying system provided in one embodiment of the present application;

[0031] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0032] Figure 8 A schematic perspective view of some components of an MVR waste drying system provided in one embodiment of the present application;

[0033] Figure 9 for Figure 8 Enlarged view of point D in the middle;

[0034] Figure 10 A schematic perspective view of some components of an MVR waste drying system provided in one embodiment of the present application;

[0035] Figure 11 A schematic perspective view of a partial structure of an MVR waste drying system provided in one embodiment of the present application;

[0036] Figure 12 for Figure 11 Enlarged view of point E in the middle;

[0037] Figure 13 This is a partial three-dimensional schematic diagram of some components of an MVR waste drying system provided in one embodiment of the present application.

[0038] Description of Figure Numbers:

[0039] 1-steam compressor; 2-internal turbulence fan; 3-first internal turbulence outlet pipe; 4-internal turbulence output hole; 5-outlet branch pipe; 6-outlet main pipe; 7-outlet riser; 8-inlet pipe; 9-second internal turbulence outlet pipe; 10-transverse connecting pipe; 11-outlet pipe; 12-compressor input pipe; 13-compressor output pipe; 14-Y-branch pipe; 15-connecting pipe; 16-first transverse pipe; 17-second transverse pipe; 18-first guide hole; 19-second guide hole; 20-sliding frame; 21-scraper; 22-stop frame; 23-push rod; 24-exhaust main pipe; 100-material closed silo; 101-frame; 102-sealing plate; 103-material inlet; 104-discharge pipe; 200-heat exchange pipe; 201-steam inlet; 202-steam outlet; 203-discharge pipe. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] It should be noted that when an element is referred to as being “fixed to” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0044] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0045] See also Figures 1 to 13 The present invention provides an MVR sewage drying system that can be used to dry sewage, feces, and other sewage, but is not limited to drying these sewage. The system can also be used for sewage concentration and drying, as well as for drying objects such as feed and grain. Any object or material suitable for drying the MVR sewage drying system falls within the scope of protection of the present invention. The MVR sewage drying system includes:

[0046] A material-enclosed silo 100 is provided with a material inlet 103 at its upper end and a material outlet at its lower end, which is connected to a discharge pipe 104. The material-enclosed silo 100 may specifically include a frame 101 and a sealing plate 102 disposed on the frame 101. The frame 101 and the sealing plate 102 together enclose a sealed material drying space.

[0047] At least one heat exchange tube group, the heat exchange tube group includes a multi-layer heat exchange pipe 200 inside the material closed silo 100, the upper surface of the heat exchange pipe 200 is used to support the material to be dried, and the multi-layer heat exchange pipe 200 is sequentially connected from top to bottom to form a continuous pipeline, and the continuous pipeline has a steam inlet 201 and a steam outlet 202, and the steam outlet 202 leads to the outside of the material closed silo 100;

[0048] A steam compressor 1, wherein the air inlet of the steam compressor 1 is connected to the interior of the material closed silo 100, and the air outlet of the steam compressor 1 is connected to the steam inlet 201 on the continuous pipeline;

[0049] The internal turbulence fan 2 has an air inlet and an air outlet both leading to the interior of the material closed bin 100 .

[0050] In the MVR waste drying system provided by the present invention, on the one hand, after the steam compressor 1 introduces compressed steam into the steam inlet 201 on the continuous pipeline, the compressed steam flows through the continuous pipeline to exchange heat with the material supported by the upper surface of each heat exchange pipe 200. The closed environment of the material closed silo 100 itself can serve as an entire moisture evaporation chamber. The evaporated steam returns to the steam compressor 1 through the air inlet of the steam compressor 1 and is compressed again and output to the heat exchange pipe 200, thereby achieving continuous and efficient drying of the material. The latent heat of steam can be used multiple times to implement material drying. Compared with technologies such as direct electric heating to implement material drying, the energy saving effect is obvious. On the other hand, the air inlet and air outlet of the internal turbulence fan 2 are both connected to the interior of the material closed silo 100. After the internal turbulence fan 2 is started, forced heat convection can be performed on the steam generated during the material drying process in the material closed silo 100, and the heat on the lower surface of the steam pipe can be quickly transferred to the material through steam convection, greatly improving the heat transfer efficiency between the hot gas in the heat exchange pipe 200 and the material supported by the heat exchange pipe 200.

[0051] According to one embodiment of the present application, the MVR waste drying system includes a first internal turbulence ejection pipe 3 provided in a closed material bin 100. The length direction of the first internal turbulence ejection pipe 3 is arranged along the length direction of the closed material bin 100. The air outlet of the internal turbulence blower 2 is connected to the first internal turbulence ejection pipe 3. The first internal turbulence ejection pipe 3 has a plurality of internal turbulence output holes 4 arranged at intervals along its length direction. Furthermore, a first internal turbulence ejection pipe 3 is arranged on one side above each heat exchange pipe 200. The air outlet of the internal turbulence blower 2 is connected to an air outlet branch pipe 5 corresponding to the number of the first internal turbulence ejection pipes 3. Each air outlet branch pipe 5 is connected to each first internal turbulence ejection pipe 3 in a one-to-one correspondence. Specifically, each air outlet branch pipe 5 is connected to the pipe opening 31 on the first internal turbulence ejection pipe 3 in a one-to-one correspondence. The internal turbulence output hole 4 on each first internal turbulence ejection pipe 3 faces directly above the corresponding heat exchange pipe 200. The internal turbulence blower 2 forms The forced convection airflow passes through the multiple internal turbulence output holes 4 arranged at intervals along the length direction on the first internal turbulence ejection pipe 3 on the upper side of each layer of heat exchange pipe 200, forming a three-dimensional matrix of airflow ejection points densely distributed along the height direction and length direction of the material closed bin 100, forming a three-dimensional space dense airflow sweep, so that the forced convection generated by the internal turbulence fan 2 densely covers the entire space of the material closed bin 100, further enhancing the effect of forced convection.

[0052] In this embodiment, specifically, the air outlet of the internal turbulence fan 2 is connected to the main air outlet pipe 6, which is equipped with a heater. The main air outlet pipe 6 is connected to the air outlet riser 7, and the air outlet riser 7 is connected to each air outlet branch pipe 5 from top to bottom. The air outlet branch pipe 5 passes through the wall of the material closed silo 100. Of course, as other embodiments, it is not necessary to arrange the first internal turbulence ejection pipe 3 on one side and the other side above each layer of heat exchange pipe 200. For example, it is also possible not to arrange the first internal turbulence ejection pipe 3 above the topmost layer of heat exchange pipe 200. The position of the row of air outlet branch pipes 5 from top to bottom can be arranged in the middle of the length direction of the material closed silo 100, and the air inlet of the internal turbulence fan 2 can be connected to the lower part of the material closed silo 100, adjacent to the length direction of the material closed silo 100. Specifically, the material closed silo 100 is installed with an air inlet pipe 8 that connects the inside and outside of the material closed silo 100, and the air inlet of the internal turbulence fan 2 is connected to the air inlet pipe 8.

[0053] According to one embodiment of the present application, a second inner turbulence ejection pipe 9 is arranged on one side above each heat exchange pipe 200, and the second inner turbulence ejection pipe 9 has a plurality of inner turbulence output holes 4 arranged at intervals along its length direction, and the second inner turbulence ejection pipe 9 is connected to the corresponding first inner turbulence ejection pipe 3 through a transverse connecting pipe 10, and the inner turbulence output holes 4 on each second inner turbulence ejection pipe 9 face directly above the corresponding heat exchange pipe 200, and there are inner turbulence output holes 4 on both sides above each layer of heat exchange pipe 200 to eject airflow, further enhancing the ability of the inner turbulence fan 2 to promote forced convection of steam in the material closed warehouse 100.

[0054] According to a preferred embodiment of the present application, a far-infrared coating is provided under each heat exchange pipe 200. The far-infrared coating under each layer of heat exchange pipe 200 forms thermal radiation for the material to be dried supported by the lower layer of heat exchange pipe 200, and fully utilizes the heat of the upper layer of heat exchange pipe 200 to perform heat exchange drying on the material supported by the lower layer of heat exchange pipe 200, thereby improving the energy utilization rate of compressed steam and further improving the drying efficiency of the material in the closed material bin 100. Combined with the internal turbulence fan 2, the steam formed during the material drying process is forced to undergo heat convection in the closed material bin 100, which can quickly transfer the heat from the lower surface of the multi-layer heat exchange pipe 200 to the material.

[0055] According to one embodiment of the present application, the top of the material-enclosed silo 100 has a silo air outlet, and an air outlet pipe 11 is installed at the silo air outlet. The air inlet of the steam compressor 1 is connected to the silo air outlet through the compressor input pipe 12 and thus connected to the interior of the material-enclosed silo 100. The compressor input pipe 12 is connected to the air outlet pipe 11, and the air outlet of the steam compressor 1 is connected to the topmost heat exchange pipe 200 in each group of heat exchange pipe groups through the compressor output pipe 13. For example, one embodiment of the present application shows that there are two groups of heat exchange tube groups, and the compressor output pipe 13 is connected to the Y-shaped branch pipe 14, and the Y-shaped branch pipe 14 is respectively connected to the topmost heat exchange pipe 200 in each group of heat exchange tube groups, that is, a steam inlet 201 is provided on the topmost heat exchange pipe 200 in the heat exchange tube group. Specifically, the multiple layers of heat exchange pipes 200 are connected into a continuous pipeline through the connecting pipe 15 from top to bottom. In addition, the steam outlet 202 can be opened at the end of the bottommost heat exchange pipe 200 in each group of heat exchange tube groups and connected to the exhaust main pipe 24. The exhaust main pipe 24 passes through the material closed bin body 100 so that the steam at the steam outlet 202 can be discharged to the outside of the material closed bin body 100 through the exhaust main pipe 24, so that the steam entering from the steam inlet 201 can pass through the entire continuous pipeline.

[0056] As other embodiments, it is also possible to have 3, 4 or more groups of heat exchange tube groups, the number of layers of heat exchange pipes 200 in each group of heat exchange tube groups is at least greater than 2, and the number of layers of heat exchange pipes 200 in each group of heat exchange tube groups can be the same or different.

[0057] According to a specific embodiment of the present application, the heat exchange pipe 200 includes a plurality of row pipes 203 arranged along the width direction of the material closed silo 100. The row pipes 203 of each layer of heat exchange pipes 200 are connected sequentially from top to bottom, and the corresponding row pipes 203 on the upper and lower layers are connected by a connecting pipe 15. The outlet of the steam compressor 1 is connected to each row pipe 203 in the uppermost layer of heat exchange pipes 200 in each heat exchange pipe group through the compressor output pipe 13. The row pipes 203 are rectangular in shape, so that the entire heat exchange pipe 200 forms a flat rectangular structure. The upper surface of the rectangular structure is flat, which can better support the material to be dried. Of course, the row pipes 203 are not limited to rectangular tubes. Each row pipe 203 of the uppermost layer of heat exchange pipes 200 in each heat exchange pipe group has a steam inlet 201, and each row pipe 203 of the lowermost layer of heat exchange pipes 200 in each heat exchange pipe group has a steam outlet 202. The steam outlet 202 of each row pipe 203 is connected to the exhaust manifold 24.

[0058] According to one embodiment of the present application, the MVR waste drying system includes a first transverse pipe 16 and a second transverse pipe 17 arranged in a material closed bin 100. The first transverse pipe 16 and the second transverse pipe 17 both extend along the width direction of the material closed bin 100 and are connected to each other. The second transverse pipe 17 is connected to each row pipe 203 in the topmost heat exchange pipe 200 in each group of heat exchange tube groups. The air outlet of the steam compressor 1 is connected to the first transverse pipe 16 and the second transverse pipe 17 respectively through the compressor output pipe 13. The number of the first transverse pipe 16 and the second transverse pipe 17 corresponds to the number of groups of heat exchange tube groups. For example, when there are two groups of heat exchange tube groups, there are two groups of first transverse pipes 16 and second transverse pipes 17. The compressor output pipe 13 is connected to the Y-shaped branch pipe 14, and the Y-shaped branch pipe 14 is connected to each group of the first transverse pipe 16 and the second transverse pipe 17 respectively.

[0059] According to a preferred embodiment of the present application, one side of the second transverse pipe 17 is connected to each row pipe 203 of the corresponding heat exchange pipe 200 through a plurality of first guide holes 18, specifically, each first guide hole 18 is connected to the steam inlet 201 of the row pipe 203 having a steam inlet 201, specifically, the first guide hole 18 leads to the steam inlet 201, and the number of the plurality of first guide holes 18 and the plurality of row pipes 203 connected to the second transverse pipe 17 corresponds to each other, and the other side of the second transverse pipe 17 is connected to the first transverse pipe 16 through a plurality of second guide holes 19, the number and position of the second guide holes 19 correspond one-to-one to the plurality of first guide holes 18, and the aperture of the second guide holes 19 is larger than the aperture of the corresponding first guide holes 18, and the position of the hole center of the second guide hole 19 is lower than the position of the hole center of the first guide hole 18, and the first transverse pipe 16 and the second transverse pipe 17 both extend along the width direction of the material enclosed bin body 100, and the row pipe 203 extends along the length direction of the material enclosed bin body 100.

[0060] According to one embodiment of the present application, the MVR waste drying system also includes a multi-layer material pushing mechanism arranged in sequence from top to bottom inside the material closed bin 100, and each material pushing mechanism is located one by one above each heat exchange pipe 200. The material entering the material closed bin 100 from the material inlet 103 can pass through the upper surface of each layer of heat exchange pipe 200 from top to bottom under the push of each layer of material pushing mechanism to reach the material outlet. The material pushing mechanism can push and flip the material, reduce thermal resistance, accelerate heat conduction between the heat exchange pipe 200 and the material supported thereon, and further improve the drying efficiency of the material.

[0061] According to an embodiment of the present application, the pushing directions of the two upper and lower adjacent material pushing mechanisms are opposite, and the upper and lower adjacent heat exchange pipes 200 are staggered in the vertical direction.

[0062] According to a specific embodiment of the present application, the material pushing mechanism includes a sliding frame 20, a scraper 21 and a stop frame 22. The sliding frame 20 can be installed in the material closed bin 100 in a horizontal reciprocating sliding manner. The scraper 21 is hinged below the sliding frame 20. The stop frame 22 is set below the sliding frame 20 and is located on one side of the scraper 21. When the sliding frame 20 moves horizontally in a first direction, the scraper 21 is stopped by the stop frame 22 to scrape the material on the heat exchange pipe 200 in the first direction. When the sliding frame 20 moves horizontally in a second direction opposite to the first direction, the scraper 21 is stopped by the stop frame 22. The materials on the heat exchange pipe 200 are lifted up without scraping the materials. Both ends of the sliding frame 20 are connected to push rods 23 extending out of the material sealing bin 100. Alternatively, only one end of the sliding frame 20 may be connected to the push rod 23. The push rod 23 can be manually operated to drive the sliding frame 20 to reciprocate in the horizontal direction. Alternatively, the push rod 23 can be driven by mechanical automation equipment such as a cylinder or a hydraulic cylinder, or by a motor driving a gear rack mechanism, a screw mechanism, or other mechanisms that can convert rotational motion into linear motion to drive the push rod 23 to reciprocate in the horizontal direction.

[0063] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An MVR waste drying system, characterized in that: include: A material closed bin body, wherein the upper end of the material closed bin body has a material inlet, and the lower end of the material closed bin body has a material outlet; At least one heat exchange tube group, the heat exchange tube group including multiple layers of heat exchange pipes inside the material closed silo, the upper surface of the heat exchange pipes is used to support the material to be dried, the multiple layers of heat exchange pipes are sequentially connected from top to bottom to form a continuous pipeline, the continuous pipeline has a steam inlet and a steam outlet, and the steam outlet leads to the outside of the material closed silo; a steam compressor, wherein the air inlet of the steam compressor is connected to the interior of the material closed bin, and the air outlet of the steam compressor is connected to the steam inlet of the continuous pipeline; An internal turbulence fan, wherein the air inlet and the air outlet of the internal turbulence fan are both connected to the interior of the material closed bin; The top of the material closed silo is provided with a silo air outlet, the air inlet of the steam compressor is connected to the silo air outlet through a compressor input pipe, and the air outlet of the steam compressor is connected to the uppermost heat exchange pipe in each heat exchange tube group through a compressor output pipe; The heat exchange pipe includes a plurality of pipes arranged along the width direction of the material closed silo, and the pipes of the multiple layers of heat exchange pipes are connected in sequence from top to bottom. The air outlet of the steam compressor is connected to the pipes of the uppermost layer of the heat exchange pipe in each group of heat exchange pipes through the compressor output pipe. The MVR waste drying system includes a first transverse pipe and a second transverse pipe disposed in the material enclosed silo. The first transverse pipe and the second transverse pipe both extend along the width direction of the material enclosed silo and are connected to each other. The second transverse pipe is connected to each row of pipes in the uppermost heat exchange pipe in each heat exchange pipe group. The air outlet of the compressor output pipe is connected to the first transverse pipe and the second transverse pipe respectively through the compressor output pipe. One side of the second transverse pipe is connected to each row of pipes through a plurality of first guide holes, and the plurality of first guide holes corresponds to the number of the plurality of row of pipes connected to the second transverse pipe. The other side of the second transverse pipe is connected to the first transverse pipe through a plurality of second guide holes, and the number and position of the second guide holes correspond to the plurality of first guide holes one-to-one, and the aperture of the second guide hole is larger than the aperture of the corresponding first guide hole, and the position of the hole center of the second guide hole is lower than the position of the hole center of the first guide hole.

2. The MVR waste drying system according to claim 1, characterized in that: The MVR waste drying system includes a first internal turbulence ejection pipe arranged in the material closed bin body, the length direction of the first internal turbulence ejection pipe is arranged along the length direction of the material closed bin body, the air outlet of the internal turbulence fan is connected to the first internal turbulence ejection pipe, and the first internal turbulence ejection pipe has a plurality of internal turbulence output holes arranged at intervals along its length direction.

3. The MVR waste drying system according to claim 2, characterized in that: A first internal turbulence outlet pipe is arranged on the upper side of each of the heat exchange pipes, and the air outlet of the internal turbulence fan is connected to air outlet branch pipes corresponding to the number of the first internal turbulence outlet pipes, and each air outlet branch pipe is connected to each of the first internal turbulence outlet pipes one by one, and the internal turbulence output hole on each of the first internal turbulence outlet pipes faces directly above the corresponding heat exchange pipe.

4. The MVR waste drying system according to claim 3, characterized in that: A second inner turbulence outlet pipe is arranged on one side above each of the heat exchange pipes, and the second inner turbulence outlet pipe has a plurality of inner turbulence output holes arranged at intervals along its length direction. The second inner turbulence outlet pipe is connected to the corresponding first inner turbulence outlet pipe through a transverse connecting pipe, and the inner turbulence output hole on each of the second inner turbulence outlet pipes faces directly above the corresponding heat exchange pipe.

5. The MVR waste drying system according to claim 1, characterized in that: A far-infrared coating is provided below each of the heat exchange pipes.

6. The MVR waste drying system according to any one of claims 1 to 5, characterized in that: The MVR waste drying system also includes multiple layers of material pushing mechanisms arranged sequentially from top to bottom inside the material closed bin body, and each of the material pushing mechanisms is correspondingly located above each of the heat exchange pipes. The material entering the material closed bin body from the material inlet can be pushed by the material pushing mechanisms of each layer and pass through the upper surface of each layer of the heat exchange pipe from top to bottom to reach the material outlet.

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