Steam pipeline layout structure of MVR drying system and MVR drying system

Abstract

The utility model relates to the technical field of material drying equipment, and provides a steam pipeline layout structure of an MVR drying system and the MVR drying system.The steam pipeline layout structure of the MVR drying system comprises a steam compressor, a condensate water discharging pipe, a condensate gas discharging pipe and multiple layers of material supporting pipes which are sequentially arranged from top to bottom; a steam heating cavity is defined by the material supporting pipes; the multiple layers of material supporting pipes are sequentially connected in series from top to bottom, and a gas outlet of the steam compressor and the condensed gas discharging pipe are both connected with any one of the multiple layers of material supporting pipes; or the multiple layers of material supporting pipes are divided into multiple material supporting pipe series connection sets, all the material supporting pipes in each material supporting pipe series connection set are sequentially connected in series from top to bottom, and the air outlet of the steam compressor and the condensed air discharging pipe are both connected with any material supporting pipe in each material supporting pipe series connection set; compared with the mode that all the material supporting pipes are connected with the steam compressor in parallel, the steam pipeline layout structure improves the steam flowability, and heat exchange is more uniform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material drying equipment, and more particularly to a vapor pipeline layout structure of an MVR drying system and the MVR drying system. BACKGROUND

[0002] Mechanical vapor recompression technology (MVR) is an energy-saving technology developed in recent years. In an MVR system, the secondary steam generated by an evaporator is sucked into a compressor and compressed, and the steam temperature and pressure are increased. These compressed steam is then sent back to the evaporator as a heat source to continue participating in the evaporation process. Through such a cycle, the evaporation operation that originally consumes a large amount of energy instead relies on the recycled steam, thereby greatly reducing energy consumption. This technology has good application in the evaporation of liquid with good flowability. However, the existing MVR drying system has the defects of low vapor pipeline heat exchange efficiency, uneven heat exchange, and low material drying efficiency. CONTENT OF THE INVENTION

[0003] Therefore, the present application provides a vapor pipeline layout structure of an MVR drying system to solve the technical problem of low vapor pipeline heat exchange efficiency, uneven heat exchange, and low material drying efficiency in the existing MVR drying system.

[0004] In one aspect, the present application provides a vapor pipeline layout structure of an MVR drying system, comprising:

[0005] a steam compressor, a condensate water discharge pipe, a condensate gas discharge pipe, and a plurality of layers of material support pipes arranged in sequence from top to bottom, wherein the material support pipes enclose a steam heating cavity;

[0006] The plurality of layers of material support pipes are connected in sequence from top to bottom, the gas outlet of the steam compressor and the condensate gas discharge pipe are connected to any material support pipe in the plurality of layers of material support pipes, and the lowermost material support pipe in the plurality of layers of material support pipes is connected to the condensate water discharge pipe; or the plurality of layers of material support pipes are divided into a plurality of groups of material support pipe series, the material support pipes in each group of material support pipe series are connected in sequence from top to bottom, the gas outlet of the steam compressor and the condensate gas discharge pipe are connected to any material support pipe in each group of material support pipe series, and the lowermost material support pipe in each group of material support pipe series is connected to the condensate water discharge pipe.

[0007] Further, the material support pipe comprises a plurality of steam channels arranged in sequence and spaced apart in the horizontal direction.

[0008] Further, the outer edge of the material support pipe is formed as a rectangular support table structure, and the plurality of steam channels are arranged in sequence along the width direction of the rectangular support table structure, and the steam flow direction of the steam channels is along the length direction of the rectangular support table structure.

[0009] Further, the same end of each steam channel in the material support pipe connected with the gas outlet of the steam compressor is connected with the gas outlet of the steam compressor.

[0010] Further, the two adjacent material support pipes in sequence are connected through the corresponding connecting pipe.

[0011] Further, the plurality of layers of material support pipes and the corresponding connecting pipes form a reciprocating bending extension structure.

[0012] In addition, the utility model also provides a kind of MVR drying system, including the steam pipe layout structure of above-mentioned MVR drying system, wherein, the MVR drying system further includes closed warehouse, the upper end of the closed warehouse has material inlet, the lower end of the closed warehouse has material outlet, the gas inlet of the steam compressor is communicated to the upper portion in the closed warehouse, the uppermost material support pipe in the plurality of layers of material support pipes is located in the just below of the material inlet, the lowermost material support pipe in the plurality of layers of material support pipes is located in the just side of the material outlet.

[0013] Further, the MVR drying system further includes multiple layers of material pushing mechanisms arranged in sequence from top to bottom inside the closed warehouse, each material pushing mechanism is located above each material support pipe one by one, and the material entering the closed warehouse from the material inlet can pass through the upper surface of each layer of material support pipes from top to bottom in sequence under the pushing of each layer of material pushing mechanisms and reach the material outlet.

[0014] Further, the pushing direction of each of the two adjacent material pushing mechanisms is opposite, and the two adjacent material support pipes in the multiple layers of material support pipes are arranged in vertical direction.

[0015] Further, the material pushing mechanism comprises a linear telescopic driving mechanism, a sliding frame, a scraper and a toothed plate, the sliding frame is connected with the linear telescopic driving mechanism to be able to reciprocate above the corresponding material support pipe, the scraper is hinged below the sliding frame, the toothed plate is fixedly connected below the sliding frame and the teeth thereof are arranged downward, when the sliding frame moves along the pushing execution direction, the scraper is stopped by the sliding frame at a pushing working position to scrape the material on the corresponding material support pipe along the pushing execution direction, when the sliding frame moves along the direction opposite to the pushing execution direction, the scraper is lifted by the material on the corresponding material support pipe to rotate from the pushing working position to a non-pushing working position.

[0016] The MVR drying system provided by the application has the beneficial effects that:

[0017] In the steam pipeline layout structure of the MVR drying system provided by the application, either the multi-layer material support pipes are connected in series from top to bottom, the gas outlet of the steam compressor is connected with any material support pipe in the multi-layer material support pipes, or the multi-layer material support pipes are divided into a plurality of material support pipe series connection groups, each material support pipe in each material support pipe series connection group is connected in series from top to bottom, and the gas outlet of the steam compressor is connected with any material support pipe in each material support pipe series connection group, so that the steam output by the gas outlet of the steam compressor can flow layer by layer along the connected path after entering the corresponding material support pipe, forming continuous and continuous flowing steam, compared with the parallel connection mode of the material support pipes and the steam compressor, the steam flowability is greatly improved, thereby improving the heat exchange efficiency between the steam in the material support pipe and outside the material support pipe, and the heat exchange is more uniform, and the drying efficiency of the material supported on the material support pipe can be greatly improved.

[0018] In the further scheme, the toothed plate can rake the material regardless of whether the sliding frame moves along the pushing execution direction or the direction opposite thereto, and the heat receiving property of the material is improved, and when the sliding frame moves along the direction opposite to the pushing execution direction, the scraper is lifted by the material on the corresponding material support pipe to rotate from the pushing working position to the non-pushing working position, so that the scraper cannot scrape the material along the direction opposite to the pushing execution direction at this time, and the material is scraped in the predetermined direction (the pushing execution direction) until falling into the material support pipe below from the end of the material support pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0020] Figure 1 Structure schematic diagram of the MVR drying system provided by an embodiment of the present application;

[0021] Figure 2 Stereogram of the material support pipe in the vapor pipeline layout structure of the MVR drying system provided by an embodiment of the present application;

[0022] Figure 3 Partial structure schematic diagram of the material pushing mechanism in the MVR drying system provided by an embodiment of the present application, in which the scraper is in the pushing working position;

[0023] Figure 4 Partial structure schematic diagram of the material pushing mechanism in the MVR drying system provided by an embodiment of the present application, in which the scraper is in the non-pushing working position;

[0024] Figure 5 Cross-sectional schematic diagram of the MVR drying system provided by an embodiment of the present application;

[0025] Figure 6 For Figure 5 Enlarged view of A in FIG. 6;

[0026] Figure 7 Stereogram of the material pushing mechanism in the MVR drying system provided by an embodiment of the present application;

[0027] Figure 8 Local stereogram of the material pushing mechanism in the MVR drying system provided by an embodiment of the present application.

[0028] The label details involved in the above drawings are as follows:

[0029] 1-vapor compressor; 2-condensed water discharge pipe; 3-condensed gas discharge pipe; 4-connection pipeline; 5-linear telescopic driving mechanism; 6-sliding frame; 7-scraper; 8-toothed plate; 9-oscillating plate; 10-stop plate; 11-first pulley; 12-second pulley; 13-guide rail; 14-first pipeline; 15-second pipeline; 100-material support pipe; 101-vapor channel; 102-baffle; 200-closed bin; 201-material inlet; 202-material outlet; 203-vapor outlet. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0031] 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.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0034] In order to illustrate the technical solutions described in the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0035] Referring to Figure 1 , Figure 2 and Figure 5 , according to one aspect of the present application, a steam pipeline layout structure of an MVR drying system is provided, comprising:

[0036] A steam compressor 1, a condensate discharge pipe 2, a condensate discharge pipe 3 and a plurality of layers of material support pipes 100 arranged in order from top to bottom, the material support pipes 100 are enclosed to form a steam heating cavity;

[0037] The multi-layer material supporting pipes 100 are connected in series from top to bottom, the outlet of the steam compressor 1 is connected with any (for example, the uppermost) material supporting pipe 100 in the multi-layer material supporting pipes 100, the condensed gas discharge pipe 3 is connected with any (for example, the lowermost or the second lowermost) material supporting pipe 100 in the multi-layer material supporting pipes 100, and the first pipeline 14 can be used to connect the corresponding material supporting pipe 100, and the lowermost material supporting pipe 100 in the multi-layer material supporting pipes 100 is connected to the condensed water discharge pipe 2; or the multi-layer material supporting pipes 100 are divided into a plurality of groups of material supporting pipe series, the material supporting pipes 100 in each group of material supporting pipe series are connected in series from top to bottom, the outlet of the steam compressor 1 is connected with any (for example, the uppermost) material supporting pipe 100 in each group of material supporting pipe series, the condensed gas discharge pipe 3 is connected with any (for example, the lowermost or the second lowermost in the corresponding group) material supporting pipe 100 in each group of material supporting pipe series, and the first pipeline 14 can be used to connect the corresponding material supporting pipe 100, and the lowermost material supporting pipe 100 in each group of material supporting pipe series is connected to the condensed water discharge pipe 2, and the condensed water discharge pipe 2 and the condensed gas discharge pipe 3 can be integrated on the same pipeline or can be different pipelines. In the case that the multi-layer material supporting pipes 100 are divided into a plurality of groups of material supporting pipe series, specifically, taking the figure as an example, the multi-layer material supporting pipes 100 are divided into two groups of material supporting pipe series, and there are ten layers in total, which can be that in the direction from top to bottom, the first layer, the fourth layer, the fifth layer, the eighth layer and the ninth layer of the material supporting pipes 100 form one group of material supporting pipe series, and the second layer, the third layer, the sixth layer, the seventh layer and the tenth layer form another group of material supporting pipe series, but the utility model is not limited to this grouping layout mode, and three groups, four groups or more groups of material supporting pipe series are also possible, and the total number of material supporting pipes 100 is not limited to ten layers, and the series grouping layout scheme of the multi-layer material supporting pipes 100 in these cases can be flexibly combined and designed according to the above examples.

[0038] The steam output by the steam outlet of the steam compressor 1 can flow layer by layer along the corresponding material support pipe 100 after entering the material support pipe 100, for example, when the steam outlet of the steam compressor 1 is connected with the uppermost material support pipe 100 in the multi-layer material support pipe 100, the steam can flow downward layer by layer, and continuous and continuous steam flow is formed. Compared with the parallel mode of the material support pipe 100 and the steam compressor 1, the steam flowability is greatly improved, thereby improving the heat exchange efficiency of the steam in the material support pipe 100 and outside the material support pipe 100, the heat exchange is more uniform, and the drying efficiency of the material supported on the material support pipe 100 can be greatly improved.

[0039] MVR (mechanical vapor recompression) is a short name of steam mechanical re-compression technology. MVR is an energy-saving technology that reuses the energy of secondary steam generated by itself, thereby reducing the demand for external energy. Studies have shown that if a ton of water is directly heated by electricity, about 700 degrees of electricity is consumed, and only 20-60 degrees of electricity is consumed by using MVR drying.

[0040] According to the specific embodiments of the present application, the material support pipe 100 includes a plurality of steam channels 101 arranged in sequence and spaced apart in the horizontal direction (which can be spaced apart by a partition 102). The steam heating cavity is divided into a plurality of steam channels 101. The outer edge of the material support pipe 100 is formed as a rectangular support table structure, the material support pipe 100 is preferably a rectangular pipe, the steam channel 101 is preferably a rectangular channel or a square channel, and the plurality of steam channels 101 are arranged in sequence and spaced apart along the width direction of the rectangular support table structure. The steam flow direction of the steam channel 101 is in the length direction of the rectangular support table structure. In addition, the same end of each steam channel 101 in the material support pipe 100 connected with the steam outlet of the steam compressor 1 is connected with the steam outlet of the steam compressor 1.

[0041] According to the preferred embodiments of the present application, the two adjacent material support pipes 100 in the material support pipe 100 connected in sequence are connected by a corresponding connecting pipe 4. The connecting pipe 4 is a U-shaped pipe, and the two arms of the U-shaped pipe are of different lengths. In this way, the upper and lower adjacent material support pipes 100 in the multi-layer material support pipe 100 mentioned later are arranged in the vertical direction.

[0042] According to one embodiment of the present application, the multi-layer material support pipe 100 and the corresponding connecting pipe 4 form a reciprocating bending extension structure, similar to extending along a continuous S-shaped path, so that the steam output from the outlet of the steam compressor 1 can flow along the reciprocating bending extension path to the lowermost material support pipe 100 in the multi-layer material support pipe 100 or the lowermost material support pipe 100 in the series of material support pipes, forming continuous and continuous steam flow along the reciprocating bending extension path, further improving the steam flow, thereby improving the heat exchange efficiency between the steam in the material support pipe 100 and the outside of the material support pipe 100, making the heat exchange more uniform, and can greatly improve the drying efficiency of the material supported on the material support pipe 100.

[0043] Referring to Figures 1 to 8 According to another aspect of the present application, an MVR drying system is also provided, which can be used for drying solid materials and also for drying liquids (liquid concentration), and includes the vapor pipe layout structure of the MVR drying system described above, wherein the MVR drying system further includes a closed warehouse 200, the upper end of the closed warehouse 200 has a material inlet 201, the lower end of the closed warehouse 200 has a material outlet 202, the gas inlet of the steam compressor 1 is connected to the upper part of the closed warehouse 200, specifically, the upper part of the closed warehouse 200 has a steam outlet 203, the gas inlet of the steam compressor 1 is connected to the upper part of the closed warehouse 200 through the steam outlet 203, specifically, the gas inlet of the steam compressor 1 is connected to the second pipe 15, one end of the second pipe 15 is connected to the steam outlet 203, one end of the uppermost material support pipe 100 in the multi-layer material support pipe 100 is located directly below the material inlet 201, one end of the lowermost material support pipe 100 in the multi-layer material support pipe 100 is located directly to the side of the material outlet 202, the steam compressor 1 is located outside the closed warehouse 200, the steam compressor 1 is a device that increases the temperature and pressure of the steam generated by the heat recovery system through compression, and its function is to pressurize and heat the low-pressure (or low-temperature) steam to meet the temperature and pressure requirements required by the process or engineering.

[0044] According to a specific embodiment of the present application, the MVR drying system further includes a plurality of material pushing mechanisms arranged from top to bottom inside the closed warehouse 200, each material pushing mechanism is located above each material support pipe 100, and the material entering the closed warehouse 200 from the material inlet 201 can pass through the upper surfaces of each layer of material support pipes 100 from top to bottom under the pushing of each layer of material pushing mechanisms and reach the material outlet 202.

[0045] The closed environment of the closed bin 200 itself can serve as a whole moisture evaporation cavity, so when the solid material enters the closed bin 200 from the material inlet 201 and moves from top to bottom through the upper surfaces of the material support pipes 100 of each layer under the pushing of the material pushing mechanism of each layer to reach the material outlet 202, the material on each material support pipe 100 is heated by the heat generated by the lower material support pipe 100 and subjected to the negative pressure evaporation effect of the whole moisture evaporation cavity formed in the closed bin 200 during the movement, and the internal moisture of the solid material is continuously evaporated and dried, and finally discharged from the material outlet 202. The vapor compressor continuously sucks vapor from the moisture evaporation cavity and pressurizes it into the material support pipe 100, and a large amount of heat is released in the secondary vapor condensation process to evaporate the moisture of the material. The MVR drying system makes the solid material "flow", ensures that the system can continuously produce while realizing continuous and efficient drying of solid materials, can utilize the latent heat of steam multiple times to implement material drying, and compared with direct electric heating to implement material drying, the energy-saving effect is obvious.

[0046] In addition, the closed bin 200 is a heat preservation material bin, that is, the bin wall of the closed bin 200 itself has a heat preservation function; or the MVR drying system comprises a heat preservation layer arranged on at least one of the outer surface and the inner surface of the closed bin 200, so that the closed bin 200 can lock the heat and improve the effect of heat on the drying of the solid material.

[0047] According to one embodiment of the present application, the pushing directions of the two material pushing mechanisms adjacent to each other in the vertical direction are opposite, and the upper and lower adjacent material support pipes 100 in the multi-layer material support pipe 100 are arranged in the vertical direction, which can make the space layout of the whole closed solid material MVR drying system reasonable and regular, save the layout space, and facilitate the continuous reciprocating "flow" of the material.

[0048] According to specific embodiments of the present application, the material pushing mechanism comprises a linear telescopic driving mechanism 5, a sliding frame 6, a scraper 7 and a toothed plate 8, the sliding frame 6 is connected with the linear telescopic driving mechanism 5 to be able to reciprocate above the corresponding material support pipe 100, the scraper 7 is hinged below the sliding frame 6, the toothed plate 8 is fixedly connected below the sliding frame 6 and the teeth thereof are arranged downward, when the sliding frame 6 moves along the pushing execution direction, the scraper 7 is stopped by the sliding frame 6 at the pushing working position to scrape the material on the corresponding material support pipe 100 along the pushing execution direction, when the sliding frame 6 moves along the direction opposite to the pushing execution direction, the scraper 7 is lifted by the material on the corresponding material support pipe 100 to rotate from the pushing working position to the non-pushing working position, since the toothed plate 8 is fixedly connected below the sliding frame 6 and the teeth thereof are arranged downward, no matter the sliding frame 6 moves along the pushing execution direction or the direction opposite thereto, the toothed plate 8 can turn the material to improve the material heating property, and when the sliding frame 6 moves along the direction opposite to the pushing execution direction, the scraper 7 is lifted by the material on the corresponding material support pipe 100 to rotate from the pushing working position to the non-pushing working position, which ensures that the scraper 7 cannot scrape the material along the direction opposite to the pushing execution direction at this time, and ensures that the material is scraped according to the predetermined direction (the pushing execution direction) until it falls into the material support pipe 100 below from the end of the material support pipe 100, specifically, the scraper 7 is arranged across the width direction of the sliding frame 6, a swing plate 9 is hinged on the sliding frame 6, the scraper 7 is fixedly connected with the swing plate 9, a stop plate piece 10 is arranged on the swing plate 9, when the sliding frame 6 moves along the pushing execution direction, the stop plate piece 10 contacts and abuts against the sliding frame 6, so that the scraper 7 is stopped by the sliding frame 6 at the pushing working position, and when the sliding frame 6 moves along the direction opposite to the pushing execution direction, the scraper 7 is lifted by the material on the corresponding material support pipe 100 to be driven to rotate from the pushing working position to the non-pushing working position through the rotation of the swing plate 9.

[0049] As other embodiments, the toothed plate 8 can also be replaced by other elements or structures with turning capability, the linear telescopic driving mechanism 5 can be a gas cylinder, the cylinder body of the gas cylinder is located outside the closed warehouse 200, the piston rod of the gas cylinder penetrates through the warehouse wall of the closed warehouse 200 and is connected with the sliding frame 6, but the linear telescopic driving mechanism 5 is not limited to the gas cylinder, but also can be a hydraulic cylinder, an electric push rod, a screw nut mechanism, etc., the sliding frame 6 can be slidably installed on the inner wall of the closed warehouse 200, or can be installed on other components in the closed warehouse 200, specifically, the inner wall of the closed warehouse 200 is provided with a guide rail 13, the sliding frame 6 is provided with a pulley, the pulley cooperates with the guide rail 13, specifically, the two sides of the sliding frame 6 comprise a plurality of pulley sets arranged along the length direction of the sliding frame 6, each pulley set comprises a first pulley 11 and a second pulley 12 arranged upward and downward, the guide rails 13 of the two side inner walls of the closed warehouse 200 are respectively arranged between the corresponding first pulley 11 and second pulley 12, and the first pulley 11 contacts and supports on the upper surface of the guide rail 13.

[0050] The above only is optional embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steam pipe layout structure for an MVR drying system, comprising: A steam compressor, a condensate drain pipe, a condensate drain pipe, and a multi-layered material support pipe arranged from top to bottom, the material support pipes forming a steam heating chamber; The multi-layer material support pipes are connected in series from top to bottom. The outlet of the steam compressor and the condensate discharge pipe are both connected to any one of the multi-layer material support pipes. The lowest material support pipe in the multi-layer material support pipes is connected to the condensate discharge pipe. Alternatively, the multi-layer material support pipes are divided into multiple groups of material support pipes connected in series. Each material support pipe in each group is connected in series from top to bottom. The outlet of the steam compressor and the condensate discharge pipe are both connected to any one of the material support pipes in each group. The lowest material support pipe in each group is connected to the condensate discharge pipe.

2. The steam pipe layout structure of the MVR drying system according to claim 1, characterized in that, The material support pipe includes multiple steam channels arranged at intervals along the horizontal direction.

3. The steam pipe layout structure of the MVR drying system according to claim 2, characterized in that, The outer edge of the material support pipe is formed into a rectangular support platform structure. The plurality of steam channels are arranged sequentially at intervals along the width direction of the rectangular support platform structure, and the steam flow direction of the steam channels is the same as the length direction of the rectangular support platform structure.

4. The steam pipe layout structure of the MVR drying system according to claim 3, characterized in that, The same end of each steam passage in the material support pipe connected to the outlet of the steam compressor is connected to the outlet of the steam compressor.

5. The steam pipe layout structure of the MVR drying system according to any one of claims 1 to 4, characterized in that, In a series of material support pipes connected in sequence, two adjacent material support pipes are connected by corresponding connecting pipes.

6. The steam pipe layout structure of the MVR drying system according to any one of claims 1 to 4, characterized in that, The multi-layer material support pipe and the corresponding connecting pipe form a reciprocating bending and extending structure.

7. An MVR drying system, comprising a steam pipe layout structure according to any one of claims 1 to 6, characterized in that, The MVR drying system also includes a closed chamber with a material inlet at the upper end and a material outlet at the lower end. The air inlet of the steam compressor is connected to the upper part of the closed chamber. One end of the uppermost material support pipe in the multi-layer material support pipe is located directly below the material inlet, and one end of the lowermost material support pipe in the multi-layer material support pipe is located on the side directly opposite the material outlet.

8. The MVR drying system according to claim 7, characterized in that, The MVR drying system also includes multiple layers of material pushing mechanisms arranged sequentially from top to bottom inside the closed chamber. Each material pushing mechanism is located above each material support tube. Material entering the closed chamber from the material inlet can pass through the upper surface of each layer of material support tube sequentially from top to bottom under the pushing of each layer of material pushing mechanism to reach the material outlet.

9. The MVR drying system according to claim 8, characterized in that, The pushing directions of two adjacent material pushing mechanisms are opposite, and the adjacent material support pipes in the multi-layer material support pipe are staggered in the vertical direction.

10. The MVR drying system according to claim 9, characterized in that, The material pushing mechanism includes a linear telescopic drive mechanism, a sliding frame, a scraper, and a toothed plate. The sliding frame is connected to the linear telescopic drive mechanism to reciprocate above the corresponding material support tube. The scraper is hinged below the sliding frame. The toothed plate is fixedly connected below the sliding frame with its teeth facing downwards. When the sliding frame moves along the pushing execution direction, the scraper is stopped by the sliding frame at the pushing working position to scrape the material on the corresponding material support tube along the pushing execution direction. When the sliding frame moves in the opposite direction to the pushing execution direction, the scraper is lifted by the material on the corresponding material support tube and rotates from the pushing working position to the non-pushing working position.

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