MVR dirt drying system

Abstract

The invention relates to the technical field of sludge treatment, and provides an MVR (mechanical vapor recompression) sewage drying system which comprises a material closed bin body, a material inlet, a material outlet, a material inlet, a material outlet, a material outlet, a material inlet and a material outlet, and is characterized in that the upper end of the material closed bin body is provided with a material inlet; the heat exchange pipe set comprises multiple layers of heat exchange pipelines in the material closed bin body, the upper surfaces of the heat exchange pipelines are used for supporting materials to be dried, the multiple layers of heat exchange pipelines are sequentially connected from top to bottom to form a continuous pipeline, a steam inlet and a steam outlet are formed in the continuous pipeline, and the steam outlet leads to the outside of the material closed bin body; an air inlet of the steam compressor is communicated with the interior of the material sealing bin body, and an air outlet of the steam compressor is communicated with the steam inlet in the continuous pipeline; and an air inlet and an air outlet of the inner turbulent flow fan both lead to the interior of the material sealing bin body, and the MVR dirt drying system can improve the dirt drying efficiency.

Description

Technical Field

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

[0002] Mechanical vapor recompression technology (MVR) is an energy-saving technology developed in recent years. In an MVR system, the secondary steam generated by the evaporator is sucked in and compressed by the compressor, and the steam temperature and pressure are increased. These compressed steams are then sent back to the evaporator and continue to participate in the evaporation process as a heat source. Through such a cyclic process, the evaporation operation that originally required a large amount of energy consumption now relies on these recycled steams, thus greatly reducing energy consumption. This technology has been widely applied in the evaporation and concentration of liquids.

[0003] Chinese Patent Application No. 202411585927.6 discloses a closed MVR sludge drying device, which records the technology of using MVR for sludge drying in the prior art. The following defects exist in this prior art: During the drying process of the material (sludge), due to the large contact thermal resistance of the material, the heat transfer from the steam pipeline 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, this 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] This application provides an MVR sewage drying system, which includes: A material closed bin body, 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 group of heat exchange tube groups, the heat exchange tube groups include multiple layers of heat exchange pipelines inside the material closed bin body, the upper surface of the heat exchange pipelines is used to support the material to be dried, the multiple layers of heat exchange pipelines are sequentially connected into a continuous pipeline from top to bottom, and the continuous pipeline has a steam inlet and a steam outlet, and the steam outlet leads to the outside of the material closed bin body; A steam compressor, the air inlet of the steam compressor is communicated with the inside of the material closed bin body, and the air outlet of the steam compressor is communicated with the steam inlet on 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 bin body.

[0006] Further, the MVR sewage drying system includes a first internal turbulence ejection pipe disposed 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 communicated with the first internal turbulence ejection pipe, and the first internal turbulence ejection pipe is provided with a plurality of internal turbulence output holes arranged at intervals along its length direction.

[0007] Further, one first internal turbulence ejection pipe is arranged on one side above each of the heat exchange pipes. The air outlet of the internal turbulence fan is connected with air outlet branch pipes corresponding to the number of the first internal turbulence ejection pipes. Each air outlet branch pipe is correspondingly connected to each of the first internal turbulence ejection pipes, and the internal turbulence output holes on each of the first internal turbulence ejection pipes face directly above the corresponding heat exchange pipe.

[0008] Further, one second internal turbulence ejection pipe is arranged on one side above each of the heat exchange pipes. The second internal turbulence ejection pipe is provided with a plurality of internal turbulence output holes arranged at intervals along its length direction. The second internal turbulence ejection pipe is communicated with the corresponding first internal turbulence ejection pipe through a transverse communication pipe, and the internal turbulence output holes on each of the second internal turbulence ejection pipes face directly above the corresponding heat exchange pipe.

[0009] Further, far-infrared coatings are provided below each of the heat exchange pipes.

[0010] Further, the top of the material closed bin body has a bin body air outlet. The air inlet of the steam compressor is communicated with the bin body air outlet through a compressor input pipe, and the air outlet of the steam compressor is communicated with the uppermost heat exchange pipe in each group of heat exchange pipe groups through a compressor output pipe.

[0011] Further, the heat exchange pipes include a plurality of rows of pipes arranged along the width direction of the material closed bin body. The rows of pipes of each layer of the heat exchange pipes are sequentially connected from top to bottom, and the air outlet of the steam compressor is communicated with each row of pipes in the uppermost heat exchange pipe in each group of heat exchange pipe groups through a compressor output pipe.

[0012] Further, the MVR sewage drying system includes a first horizontal pipe and a second horizontal pipe disposed in the material closed bin body. Both the first horizontal pipe and the second horizontal pipe extend along the width direction of the material closed bin body and are communicated with each other. The second horizontal pipe is communicated with each row of pipes in the uppermost heat exchange pipe in each group of heat exchange pipe groups, and the air outlet of the compressor output pipe is respectively communicated with the first horizontal pipe and the second horizontal pipe through a compressor output pipe.

[0013] Further, one side of the second horizontal pipe is communicated with each row of pipes through a plurality of first diversion holes, and the number of the plurality of first diversion holes corresponds to the number of the rows of pipes communicated with the second horizontal pipe. The other side of the second horizontal pipe is communicated with the first horizontal pipe through a plurality of second diversion holes. The number and position of the second diversion holes correspond one by one to those of the plurality of first diversion holes, and the aperture of the second diversion hole is larger than that of the corresponding first diversion hole, and the position of the center of the second diversion hole is lower than the position of the center of the first diversion hole.

[0014] Further, the MVR sewage drying system further includes a plurality of layers of material pushing mechanisms arranged in sequence from top to bottom inside the material closed bin. Each of the material pushing mechanisms is located above each of the heat exchange pipes correspondingly. The material entering the material closed bin from the material inlet can reach the material outlet after passing through the upper surfaces of each layer of the heat exchange pipes in sequence under the pushing of each layer of the material pushing mechanisms from top to bottom.

[0015] The beneficial effects of the MVR sewage drying system provided by this application are as follows: In the MVR sewage drying system provided by this application, on the one hand, after the steam compressor injects compressed steam into the steam inlet of the continuous pipeline, the compressed steam flows through the continuous pipeline and exchanges heat with the material supported by the upper surfaces of each heat exchange pipe. The closed environment of the material closed bin itself can serve as an entire moisture evaporation chamber. The evaporated steam then returns to the steam compressor through the air inlet of the steam compressor and is compressed again and output to the heat exchange pipe, thereby realizing continuous and efficient drying of the material. The latent heat of the steam can be utilized multiple times to dry the material. Compared with technologies such as directly using electric heating to dry the material, the energy-saving effect is obvious. On the other hand, both the air inlet and the air outlet of the internal turbulence fan lead to the inside of the material closed bin. After starting the internal turbulence fan, forced heat convection can be carried out on the steam formed during the material drying process inside the material closed bin, and the heat on the lower surface of the steam pipeline can be quickly transferred to the material through the steam convection effect, increasing a heat transfer path between the heat inside the heat exchange pipe and the material, which is beneficial to the evaporation of the moisture in the material.

[0016] In a further solution, far-infrared coatings are provided below each of the heat exchange pipes. The far-infrared coatings below each layer of heat exchange pipes form heat radiation on the material to be dried supported by the lower layer of heat exchange pipes, making full use of the heat of the upper layer of heat exchange pipes to conduct heat radiation heating on the material supported by the lower layer of heat exchange pipes, improving the energy utilization rate of the compressed steam, and further improving the drying efficiency of the material in the material closed bin.

[0017] In a further solution, the material pushing mechanism can push and turn the material, reducing the thermal resistance, accelerating the heat conduction between the heat exchange pipe and the material supported thereon, and further improving the drying efficiency of the material.

[0018] In summary, although there is a technology in the prior art to dry materials by passing steam into the steam pipe for heat exchange with the materials, the heat exchange method between the steam pipe and the materials to be dried in the prior art is heat conduction. During the heat conduction process, strong contact thermal resistance will be generated in the materials, seriously affecting the transfer of heat through the steam pipe to the materials to be dried. In the present invention, the internal turbulent flow fan conducts forced heat convection during the drying process of the materials in the closed material bin, that is, the present invention changes the heat exchange method between the traditional steam pipe and the materials from "heat conduction" to "heat convection". The heat exchange efficiency of heat convection itself is much higher than that of heat conduction. Combining with the thermal radiation generated by the far-infrared coating further improves the heat exchange efficiency between the steam pipe and the materials to be dried. Therefore, compared with the heat exchange method of only using traditional heat conduction between the steam pipe and the materials to be dried, the heat exchange efficiency between the steam pipe and the materials to be dried is greatly improved. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A three-dimensional schematic diagram of the MVR sewage drying system provided by an embodiment of the present application; Figure 2 A side view of the internal structure of the MVR sewage drying system provided by an embodiment of the present application; Figure 3 For Figure 2 The enlarged view of part A in; Figure 4 A partial three-dimensional view of some components of the MVR sewage drying system provided by an embodiment of the present application; Figure 5 For Figure 4 The enlarged view of part B in; Figure 6 A three-dimensional schematic diagram of some structures of the MVR sewage drying system provided by an embodiment of the present application; Figure 7 For Figure 6 The enlarged view of part C in; Figure 8Schematic perspective view of some components of the MVR sewage drying system provided by an embodiment of the present application; Figure 9 is Figure 8 The enlarged view of part D in Figure 10 Schematic perspective view of some components in the MVR sewage drying system provided by an embodiment of the present application; Figure 11 Schematic perspective view of some structures of the MVR sewage drying system provided by an embodiment of the present application; Figure 12 is Figure 11 The enlarged view of part E in Figure 13 Partial schematic perspective view of some components in the MVR sewage drying system provided by an embodiment of the present application.

[0021] Explanation of the reference numerals in the drawings: 1 - Steam compressor; 2 - Internal turbulence fan; 3 - First internal turbulence ejection pipe; 4 - Internal turbulence output hole; 5 - Air outlet branch pipe; 6 - Air outlet main pipe; 7 - Air outlet riser; 8 - Air inlet pipe; 9 - Second internal turbulence ejection pipe; 10 - Horizontal connecting pipe; 11 - Air outlet pipe; 12 - Compressor input pipeline; 13 - Compressor output pipeline; 14 - Y-shaped branch pipe; 15 - Connecting pipe; 16 - First horizontal pipe; 17 - Second horizontal pipe; 18 - First diversion hole; 19 - Second diversion hole; 20 - Sliding frame; 21 - Scraper; 22 - Stop frame; 23 - Push rod; 24 - Exhaust main pipe; 100 - Material closed bin body; 101 - Frame; 102 - Sealing plate; 103 - Material inlet; 104 - Discharge pipe; 200 - Heat exchange pipeline; 201 - Steam inlet; 202 - Steam outlet; 203 - Drain pipe. Detailed implementation manners

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0026] In order to illustrate the technical solutions described in the present application, the following will be described in detail with reference to specific drawings and embodiments.

[0027] See Figures 1 to 13 , an embodiment of the present invention provides an MVR sewage drying system, which can be used to dry sewage such as sludge and manure, but is not limited to drying these sewage, and can also be used for sewage concentration and drying, as well as drying of objects such as feed and grains. Drying any object or material adapted to the system with this MVR sewage drying system will fall within the protection scope of the present invention. Among them, the MVR sewage drying system includes: A material closed bin 100, the upper end of the material closed bin 100 has a material inlet 103, the lower end of the material closed bin 100 has a material outlet, and the material outlet is connected to a discharge pipe 104. The material closed bin 100 may specifically include a frame 101 and a sealing plate 102 provided on the frame 101. The frame 101 and the sealing plate 102 jointly enclose a closed material drying space; At least one set of heat exchange tube groups, the heat exchange tube groups include multiple layers of heat exchange pipes 200 inside the material closed bin 100. The upper surface of the heat exchange pipes 200 is used to support the material to be dried. The multiple layers of heat exchange pipes 200 are sequentially connected into a continuous pipeline from top to bottom. 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 bin 100; A steam compressor 1, the air inlet of the steam compressor 1 is communicated with the inside of the material closed bin 100, and the air outlet of the steam compressor 1 is communicated with the steam inlet 201 on the continuous pipeline; An internal turbulence fan 2, the air inlet and air outlet of the internal turbulence fan 2 both lead to the inside of the material closed bin 100.

[0028] 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 materials supported by the upper surface of each heat exchange pipe 200, and the closed environment of the material closed bin 100 itself can be used as a whole water evaporation chamber, and the evaporated steam returns to the steam compressor 1 through the air inlet of the steam compressor 1 to be compressed again and output to the heat exchange pipe 200, thereby realizing continuous and efficient drying of the material, and the latent heat of the 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 the air outlet of the internal turbulence fan 2 are both connected to the interior of the material closed bin 100. After the internal turbulence fan 2 is started, the steam formed in the material drying process can be forced to perform heat convection in the material closed bin 100, and the heat on the lower surface of the steam pipe can be quickly transferred to the material through steam convection, which greatly improves the heat transfer efficiency between the hot air in the heat exchange pipe 200 and the material supported by the heat exchange pipe 200.

[0029] According to one embodiment of the present application, the MVR waste drying system includes a first inner turbulence ejection pipe 3 disposed in a closed material bin 100, the length direction of the first inner turbulence ejection pipe 3 is arranged along the length direction of the closed material bin 100, the air outlet of the inner turbulence fan 2 is connected to the first inner turbulence ejection pipe 3, and the first inner turbulence ejection pipe 3 has a plurality of inner turbulence output holes 4 arranged at intervals along its length direction. Further, a first inner turbulence ejection pipe 3 is arranged on one side above each heat exchange pipe 200, and the air outlet of the inner turbulence fan 2 is connected to an outlet branch pipe 5 corresponding to the number of the first inner turbulence ejection pipes 3, and each outlet branch pipe 5 is connected to each first inner turbulence ejection pipe 3 one by one. Specifically, each outlet branch pipe 5 is connected to the pipe opening 31 on the first inner turbulence ejection pipe 3 one by one, and the inner turbulence output hole 4 on each first inner turbulence ejection pipe 3 faces directly above the corresponding heat exchange pipe 200, and the inner turbulence fan 2 forms The forced convection airflow passes through the multiple inner turbulence output holes 4 arranged at intervals along the length direction of the first inner turbulence ejection pipe 3 on the upper side of each layer of the 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 inner turbulence fan 2 densely covers the entire space of the material closed bin 100, further enhancing the effect of forced convection.

[0030] In this embodiment, specifically, the air outlet of the internal spoiler fan 2 is connected to the main air outlet pipe 6. The main air outlet pipe 6 is equipped with a heater. The main air outlet pipe 6 is connected to the vertical air outlet pipe 7. Each air outlet branch pipe 5 is connected to the vertical air outlet pipe 7 from top to bottom. The air outlet branch pipe 5 penetrates through the wall of the material closed bin 100. Of course, as other embodiments, it is not necessary to arrange the first internal spoiler ejection pipes 3 on one side and the other side above each layer of heat exchange pipes 200. For example, it is also possible not to set the first internal spoiler ejection pipe 3 above the topmost layer of heat exchange pipes 200. The positions of a column of air outlet branch pipes 5 from top to bottom can be arranged in the middle of the length direction of the material closed bin 100. The air inlet of the internal spoiler fan 2 can be connected to a position adjacent to the length direction of the lower part of the material closed bin 100. Specifically, an air inlet pipe 8 communicating inside and outside the material closed bin 100 is installed on the material closed bin 100, and the air inlet of the internal spoiler fan 2 is connected to the air inlet pipe 8.

[0031] According to an embodiment of the present application, a second internal spoiler ejection pipe 9 is arranged on one side above each heat exchange pipe 200. The second internal spoiler ejection pipe 9 has a plurality of internal spoiler output holes 4 arranged at intervals along its length direction. The second internal spoiler ejection pipe 9 is connected to the corresponding first internal spoiler ejection pipe 3 through a transverse communication pipe 10. The internal spoiler output holes 4 on each second internal spoiler ejection pipe 9 face directly above the corresponding heat exchange pipe 200. Airflows are ejected from the internal spoiler output holes 4 on both sides above each layer of heat exchange pipes 200, further enhancing the ability of the internal spoiler fan 2 to promote forced steam convection in the material closed bin 100.

[0032] According to a preferred embodiment of the present application, far-infrared coatings are provided below each heat exchange pipe 200. The far-infrared coatings below each layer of heat exchange pipes 200 form thermal radiation on the materials to be dried supported by the lower-layer heat exchange pipes 200, making full use of the heat of the upper-layer heat exchange pipes 200 to conduct heat exchange drying on the materials supported by the lower-layer heat exchange pipes 200, improving the energy utilization rate of the compressed steam, further enhancing the drying efficiency of the materials in the material closed bin 100, and combining with the forced heat convection of the steam formed during the drying process of the materials in the material closed bin 100 by the internal spoiler fan 2, the heat on the lower surface of the multi-layer heat exchange pipes 200 can be quickly transferred to the materials.

[0033] According to an embodiment of the present application, the top of the material closed bin 100 has a bin air outlet, and an air outlet pipe 11 is installed at the bin air outlet. The air inlet of the steam compressor 1 is connected to the bin air outlet through the compressor input pipe 12 and thus connected to the inside of the material closed bin 100. The compressor input pipe 12 is connected to the air outlet pipe 11. The air outlet of the steam compressor 1 is connected to the uppermost heat exchange pipe 200 in each group of heat exchange pipe groups through the compressor output pipe 13. For example, an embodiment of the present application shows that there are two groups of heat exchange pipe groups, then 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 uppermost heat exchange pipes 200 in each group of heat exchange pipe groups, that is, a steam inlet 201 is provided on the uppermost heat exchange pipe 200 in each group of heat exchange pipe groups. Specifically, the multi-layer heat exchange pipes 200 are sequentially connected into a continuous pipeline from top to bottom through the connecting pipes 15. In addition, the steam outlet 202 can be provided at the end of the lowermost heat exchange pipe 200 in each group of heat exchange pipe groups and connected to the exhaust main pipe 24. The exhaust main pipe 24 penetrates through the material closed bin 100 so that the steam at the steam outlet 202 can be discharged to the outside of the material closed bin 100 through the exhaust main pipe 24, which is convenient for the steam entering from the steam inlet 201 to pass through the entire continuous pipeline.

[0034] As other embodiments, it is also possible to have 3 groups, 4 groups or more groups of heat exchange pipe groups. The number of layers of the heat exchange pipes 200 in each group of heat exchange pipe groups is at least greater than 2, and the number of layers of the heat exchange pipes 200 in each group of heat exchange pipe groups can be the same or different.

[0035] According to a specific embodiment of the present application, the heat exchange pipe 200 includes a plurality of rows of pipes 203 arranged along the width direction of the material closed bin 100. The rows of pipes 203 of each layer of heat exchange pipes 200 are sequentially connected from top to bottom, and the corresponding upper and lower rows of pipes 203 are all connected by a connecting pipe 15. The air outlet of the steam compressor 1 is connected to each row of pipes 203 in the uppermost heat exchange pipe 200 in each group of heat exchange pipe groups through the compressor output pipe 13. The shape of the row of pipes 203 is rectangular, so that the entire heat exchange pipe 200 forms a rectangular structure similar to a flat plate. The upper surface of the rectangular structure is a plane, which can better support the material to be dried. Of course, the row of pipes 203 is not limited to being a rectangular pipe. Each row of pipes 203 in the uppermost heat exchange pipe 200 in each group of heat exchange pipe groups has a steam inlet 201, and each row of pipes 203 in the lowermost heat exchange pipe 200 in each group of heat exchange pipe groups has a steam outlet 202. The steam outlets 202 of each row of pipes 203 are connected to the exhaust main pipe 24.

[0036] According to an embodiment of the present application, the MVR dirt drying system includes a first horizontal pipe 16 and a second horizontal pipe 17 disposed within the material closed bin 100. Both the first horizontal pipe 16 and the second horizontal pipe 17 extend along the width direction of the material closed bin 100 and are communicated with each other. The second horizontal pipe 17 is communicated with each row pipe 203 in the uppermost heat exchange pipe group among each group of heat exchange pipe groups. The air outlet of the steam compressor 1 is respectively communicated with the first horizontal pipe 16 and the second horizontal pipe 17 through the compressor output pipe 13. The number of the first horizontal pipe 16 and the second horizontal pipe 17 corresponds to the number of groups of the heat exchange pipe groups. For example, when there are two groups of heat exchange pipe groups, there are two groups of the first horizontal pipe 16 and the second horizontal pipe 17. Then the compressor output pipe 13 is connected to a Y-shaped branch pipe 14, and the Y-shaped branch pipe 14 is respectively connected to each group of the first horizontal pipe 16 and the second horizontal pipe 17.

[0037] According to a preferred embodiment of the present application, one side of the second horizontal pipe 17 is communicated with each row pipe 203 of the corresponding heat exchange pipe 200 through a plurality of first diversion holes 18. Specifically, each first diversion hole 18 is communicated with the steam inlet 201 of the row pipe 203 having the steam inlet 201. Specifically, the first diversion hole 18 leads to the steam inlet 201. The number of the plurality of first diversion holes 18 corresponds to the number of the row pipes 203 communicated with the second horizontal pipe 17. The other side of the second horizontal pipe 17 is communicated with the first horizontal pipe 16 through a plurality of second diversion holes 19. The second diversion holes 19 correspond one-to-one in number and position to the plurality of first diversion holes 18. And the aperture of the second diversion hole 19 is larger than the aperture of the corresponding first diversion hole 18. The position of the center of the second diversion hole 19 is lower than the position of the center of the first diversion hole 18. Both the first horizontal pipe 16 and the second horizontal pipe 17 extend along the width direction of the material closed bin 100, and the row pipes 203 extend along the length direction of the material closed bin 100.

[0038] According to an embodiment of the present application, the MVR dirt drying system further includes multiple layers of material pushing mechanisms arranged in sequence from top to bottom inside the material closed bin 100. Each material pushing mechanism is correspondingly located above each heat exchange pipe 200. The material entering the material closed bin 100 from the material inlet 103 can sequentially pass through the upper surfaces of each layer of heat exchange pipes 200 from top to bottom under the pushing of each layer of material pushing mechanisms and reach the material outlet. The material pushing mechanism can push and turn the material, reducing the thermal resistance, accelerating the heat conduction between the heat exchange pipe 200 and the material supported thereon, and further improving the drying efficiency of the material.

[0039] According to an embodiment of the present application, the pushing directions of two adjacent material pushing mechanisms above and below are opposite to each other, and the adjacent heat exchange pipes 200 above and below are arranged staggeredly in the vertical direction.

[0040] According to a specific embodiment of the present application, the material pushing mechanism includes a sliding frame 20, a scraping plate 21 and a stop frame 22. The sliding frame 20 is horizontally reciprocally slidably installed in the material closed bin 100. The scraping plate 21 is hinged below the sliding frame 20. The stop frame 22 is arranged below the sliding frame 20 and on one side of the scraping plate 21. When the sliding frame 20 moves horizontally in the first direction, the scraping plate 21 is blocked 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 the second direction opposite to the first direction, the scraping plate 21 is lifted by the material on the heat exchange pipe 200 and does not scrape the material. Push rods 23 extending out of the material closed bin 100 are respectively connected to both ends of the sliding frame 20. It is also possible that only one end of the sliding frame 20 is connected to the push rod 23. The push rod 23 can drive the sliding frame 20 to reciprocally move horizontally through manual operation, or can be driven by mechanical automation equipment such as air cylinders, hydraulic cylinders, etc., or can be driven by a motor to drive mechanisms such as gear racks, lead screw mechanisms, etc. that can convert rotational motion into linear motion to drive the push rod 23 to reciprocally move horizontally.

[0041] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope 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 group of heat exchange tube groups, the heat exchange tube group includes multiple layers of heat exchange pipes inside the material closed bin, the upper surface of the heat exchange pipes is used to support the material to be dried, the multiple layers of the heat exchange pipes are 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 bin; 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 on 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.

2. The MVR waste drying system according to claim 1, characterized in that: The MVR waste drying system includes a first inner turbulence spray pipe arranged in the material closed bin body, the length direction of the first inner turbulence spray pipe is arranged along the length direction of the material closed bin body, the air outlet of the inner turbulence fan is connected to the first inner turbulence spray pipe, and the first inner turbulence spray pipe has a plurality of inner 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 inner turbulence outlet pipe is arranged on one side above each of the heat exchange pipes, and the air outlet of the inner turbulence fan is connected to air outlet branch pipes corresponding to the number of the first inner turbulence outlet pipes, and each air outlet branch pipe is connected to each of the first inner turbulence outlet pipes one by one, and the inner turbulence output hole on each of the first inner 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 ejection pipe is arranged on one side above each of the heat exchange pipes, and the second inner turbulence ejection pipe has a plurality of inner turbulence output holes arranged at intervals along its length direction, and the second inner turbulence ejection pipe is connected to the corresponding first inner turbulence ejection pipe through a transverse connecting pipe, and the inner turbulence output holes on each of the second inner turbulence ejection pipes face 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 arranged 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 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 pipeline, and the air outlet of the steam compressor is connected to the uppermost heat exchange pipeline in each group of heat exchange tube groups through a compressor output pipeline.

7. The MVR waste drying system according to claim 6, characterized in that: The heat exchange pipe includes a plurality of row pipes arranged along the width direction of the material closed bin, 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 uppermost layer of the heat exchange pipe in each group of heat exchange pipe groups through the compressor output pipe.

8. The MVR waste drying system according to claim 7, characterized in that: 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 uppermost layer of the heat exchange pipe in each group of heat exchange pipe groups, and the air outlet of the compressor output pipe is respectively connected to the first transverse tube and the second transverse tube through the compressor output pipe.

9. The MVR waste drying system according to claim 8, characterized in that: One side of the second transverse pipe is connected with each row of pipes through a plurality of first flow guide holes, and the plurality of first flow guide holes corresponds to the number of the plurality of row of pipes connected with the second transverse pipe. The other side of the second transverse pipe is connected with the first transverse pipe through a plurality of second flow guide holes, and the number and position of the second flow guide holes correspond to the plurality of first flow guide holes one by one, and the aperture of the second flow guide hole is larger than the aperture of the corresponding first flow guide hole, and the position of the hole center of the second flow guide hole is lower than the position of the hole center of the first flow guide hole.

10. The MVR waste drying system according to any one of claims 1 to 5, characterized in that: 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, each of the material pushing mechanisms being located one by one above each of the heat exchange pipes, and 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 in sequence to reach the material outlet.

Images