Closed solid material MVR drying system
The closed-loop MVR drying system addresses inefficiencies in solid-state material drying by using multiple heating chambers and steam compression for continuous, energy-efficient drying.
Patent Information
- Application Number
- CN202421703936.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The existing solid material drying technology has the problems of low drying efficiency, high energy consumption and inconvenient continuous production, especially for materials with shapes between plastic and solid.
The closed solid material MVR drying system is adopted, including a multi-layer heating chamber shell, a multi-layer material push mechanism and a steam compressor. By forming a steam heating chamber and a negative pressure evaporation chamber in the closed chamber, the steam compressor is used to circulate heating and evaporate moisture to achieve continuous and efficient drying of the material.
It realizes continuous and efficient drying of solid materials, has significant energy saving effects, and can utilize the latent heat of steam multiple times to reduce energy consumption.
Smart Images
Figure CN223106623U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of solid material drying equipment, and more specifically, to a closed solid material MVR drying system. Background Art
[0002] Dryers are mainly used to evaporate the moisture in materials, and the drying of materials is of great significance for the next-step utilization of materials. The material dryers in the prior art mainly include drum dryers, paddle dryers, multi-layer mesh belt dryers, shelf dryers, etc., and there are also vacuum dryers, etc. Mechanical vapor recompression technology (MVR) is a new drying technology developed in recent years, but this technology currently has good applications in the evaporation of flowing liquid moisture. At present, many solid materials to be dried in production are basically unable to flow because their shapes are between plastic and solid, and it is difficult to use the existing MVR process. The existing solid material drying technology also has disadvantages such as small contact area, resulting in low drying efficiency of materials, high drying energy consumption, and inconvenience for continuous production. Summary of the Utility Model
[0003] In view of this, this application provides a closed solid material MVR drying system to solve the technical problems of low drying efficiency, high energy consumption, and inconvenience for continuous production in the existing solid material drying technology.
[0004] This application provides a closed solid material MVR drying system, which includes:
[0005] A closed bin, the upper end of the closed bin has a material inlet, and the lower end of the closed bin has a material outlet;
[0006] Multiple layers of heating chamber shells arranged in sequence from top to bottom inside the closed bin, and the heating chamber shells enclose a steam heating chamber;
[0007] Multiple layers of material pushing mechanisms arranged in sequence from top to bottom inside the closed bin, each of the material pushing mechanisms is located above each of the heating chamber shells correspondingly, and the material entering the closed bin from the material inlet can reach the material outlet through the upper surfaces of each layer of the heating chamber shells in sequence under the pushing of each layer of the material pushing mechanisms;
[0008] A steam compressor, the inlet of the steam compressor is connected to the upper part inside the closed bin, and the outlet of the steam compressor is connected to each of the steam heating chambers.
[0009] Further, the upper part of the closed bin has a steam outlet, and the inlet of the steam compressor is connected to the upper part inside the closed bin through the steam outlet.
[0010] Further, the pushing directions of two adjacent material pushing mechanisms above and below are opposite to each other, and the adjacent heating chamber casings in the multi-layer heating chamber casing are arranged offset in the vertical direction.
[0011] Further, the material pushing mechanism includes a sliding frame, a scraper and a stop block. The sliding frame is horizontally reciprocatingly slidably mounted in the closed bin. The scraper is hinged below the sliding frame. The stop block is arranged below the sliding frame and on one side of the scraper. When the sliding frame moves horizontally in the first direction, the scraper is blocked by the stop block to scrape the material on the heating chamber casing in the first direction. When the sliding frame moves horizontally in the second direction opposite to the first direction, the scraper is lifted by the material on the heating chamber casing and does not scrape the material.
[0012] Further, the closed bin is a heat-insulating material bin; or, the closed solid material MVR drying system includes a heat-insulating layer provided on at least one of the outer surface and the inner surface of the closed bin.
[0013] Further, the sliding frame corresponding to the uppermost material pushing mechanism in the multi-layer material pushing mechanism is horizontally reciprocatingly slidably mounted below the upper bin wall of the closed bin, and the sliding frames corresponding to the material pushing mechanisms below the uppermost material pushing mechanism are horizontally reciprocatingly slidably mounted below each layer of heating chamber casings in one-to-one correspondence.
[0014] Further, suspension rails are installed below the upper bin wall and below each layer of heating chamber casings, and suspension wheels that are horizontally reciprocatingly slidably mounted in the corresponding suspension rails are provided above the sliding frame.
[0015] Further, a push rod extending out of the closed bin is connected to the sliding frame.
[0016] Further, a feeding valve is connected to the material inlet, and a discharging valve is connected to the material outlet.
[0017] Further, the closed solid material MVR drying system includes an input pipe. One end of the input pipe communicates with the upper part inside the closed bin, and the other end of the input pipe communicates with the air inlet of the steam compressor; the closed solid material MVR drying system further includes a plurality of output branch pipes and an output main pipe connected to the air outlet of the steam compressor. Each of the output branch pipes communicates with the output main pipe and communicates with each steam heating chamber in one-to-one correspondence.
[0018] The beneficial effects of the closed solid material MVR drying system provided by this application are as follows:
[0019] In the closed solid material MVR drying system provided by this application, since multiple layers of heating chamber shells (which form steam heating chambers), multiple layers of material pushing mechanisms, and a steam compressor are arranged in the closed bin, and the closed environment of the closed bin itself can serve as an entire moisture evaporation chamber, when the solid material enters the closed bin from the material inlet and is pushed by each layer of the material pushing mechanisms to sequentially pass through the upper surfaces of each layer of the heating chamber shells from top to bottom and reach the material outlet, the material on each layer of the heating chamber shell is heated by the heat generated by the steam heating chamber below it and undergoes negative pressure evaporation in the entire moisture evaporation chamber formed in the closed bin during the movement process. The moisture inside the solid material continuously evaporates and dries, and finally is discharged from the material outlet. The steam compressor continuously sucks steam from the moisture evaporation chamber and pressurizes it into the steam heating chamber. A large amount of heat is released during the secondary steam condensation process to supply the evaporation of the material moisture. This closed solid material MVR drying system enables the solid material to "flow", ensuring continuous production of the system while achieving continuous and efficient drying of the solid material. It can utilize the latent heat of steam multiple times to implement material drying. Compared with methods such as direct electric heating or other fuel heating to implement material drying, the energy-saving effect is more obvious. The drying system provided by this application can also add other heat sources, such as a steam generator, to achieve the complementary advantages of different heating methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of this 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 this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0021] Figure 1 Structural schematic diagram of the closed solid material MVR drying system provided by an embodiment of this application;
[0022] Figure 2 Schematic diagram of the sliding frame moving horizontally in the first direction in the closed solid material MVR drying system provided by an embodiment of this application;
[0023] Figure 3 Schematic diagram of the sliding frame moving horizontally in the second direction in the closed solid material MVR drying system provided by an embodiment of this application;
[0024] Figure 4 Top view of the material pushing mechanism in the closed solid material MVR drying system provided by an embodiment of this application;
[0025] Figure 5Schematic diagram of a longitudinal section of a closed solid material MVR drying system provided by an embodiment of the present application.
[0026] The details of the reference numerals involved in the above drawings are as follows:
[0027] 1 - Steam compressor; 2 - Suspension rail; 3 - Push rod; 4 - Suspension wheel; 5 - Feeding valve; 6 - Discharging valve; 7 - Input pipe; 8 - Output branch pipe; 9 - Output main pipe; 10 - Condensate discharge pipe; 11 - Condensing gas discharge pipe; 100 - Closed bin; 101 - Material inlet; 102 - Material outlet; 103 - Chamber; 200 - Heating chamber housing; 201 - Steam heating chamber; 300 - Material pushing mechanism; 301 - Sliding frame; 302 - Scraper; 303 - Stopper. Detailed implementation manners
[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, 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.
[0029] 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.
[0030] It should be understood that the orientation or positional relationship indicated by the terms "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, and 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 therefore should not be construed as a limitation to the present application.
[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number 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" means two or more unless otherwise specifically defined.
[0032] 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.
[0033] See Figure 1 、 Figure 4 andFigure 5 , an embodiment of the present utility model provides a closed solid material MVR drying system, including:
[0034] A closed bin 100, the upper end of the closed bin 100 has a material inlet 101, the lower end of the closed bin 100 has a material outlet 102, and the space (chamber 103) formed by the closed bin 100 serves both as the accommodation chamber for the multi-layer heating chamber outer shell 200 and the multi-layer material pushing mechanism 300, and the closed environment of the chamber 103 is equivalent to forming an entire moisture evaporation chamber;
[0035] The multi-layer heating chamber outer shells 200 arranged in sequence from top to bottom inside the closed bin 100, and the heating chamber outer shells 200 enclose a steam heating chamber 201;
[0036] The multi-layer material pushing mechanisms 300 arranged in sequence from top to bottom inside the closed bin 100, each material pushing mechanism 300 is located above each heating chamber outer shell 200 in a one-to-one correspondence, and the material entering the closed bin 100 from the material inlet 101 can reach the material outlet 102 through the upper surfaces of each layer of heating chamber outer shells 200 in sequence from top to bottom under the pushing of each layer of material pushing mechanisms 300;
[0037] A steam compressor 1, the air inlet of the steam compressor 1 is communicated with the upper part inside the closed bin 100, the air outlet of the steam compressor 1 is communicated with each steam heating chamber 201, the steam compressor 1 is located outside the closed bin 100, and the steam compressor 1 is a device that improves the steam temperature and pressure through compression in the heat recovery system. Its function is to pressurize and heat up the low-pressure (or low-temperature) steam to meet the temperature and pressure requirements required by the process or project.
[0038] In the closed solid material MVR drying system provided by the present application, since multiple layers of heating chamber shells 200 (forming steam heating chambers 201), multiple layers of material pushing mechanisms 300 and a steam compressor 1 are arranged in the closed chamber 100, and the closed environment of the closed chamber 100 itself can serve as an entire moisture evaporation chamber. Therefore, when the solid material enters the closed chamber 100 from the material inlet 101 and is pushed by each layer of the material pushing mechanism 300 to sequentially pass through the upper surfaces of each layer of heating chamber shells 200 from top to bottom and reach the material outlet 102, during the movement process, the material on each layer of heating chamber shell 200 is heated by the heat generated by the steam heating chamber 201 below it and undergoes negative pressure evaporation in the entire moisture evaporation chamber formed in the closed chamber 100. The moisture inside the solid material continuously evaporates and dries, and finally is discharged from the material outlet 102. The steam compressor continuously sucks steam from the moisture evaporation chamber and pressurizes it into the steam heating chamber. A large amount of heat is released during the condensation process of the secondary steam to supply the evaporation of the material moisture. This closed solid material MVR drying system makes the solid material "flow", ensuring continuous production of the system while achieving continuous and efficient drying of the solid material. It can utilize the latent heat of steam multiple times to dry the material, and has obvious energy-saving effects compared with technologies such as directly using electric heating to dry the material.
[0039] Among them, MVR (mechanical vapor recompression) is the abbreviation of steam mechanical recompression technology. MVR is an energy-saving technology that re-uses the energy of the secondary steam it generates itself, thereby reducing the demand for external energy. Research shows that: to evaporate one ton of water, if directly using electric heating, it requires consuming about 700 degrees of electricity, while using MVR drying only requires consuming 20 - 60 degrees of electricity.
[0040] According to an embodiment of the present application, the upper part of the closed chamber 100 has a steam outlet. The air inlet of the steam compressor 1 is connected to the upper part inside the closed chamber 100 through the steam outlet. The position of the steam outlet is higher than the uppermost heating chamber shell 200 among the multiple layers of heating chamber shells 200, so as to discharge the steam formed by the evaporation of the material moisture.
[0041] According to an embodiment of the present application, the pushing directions of the two adjacent material pushing mechanisms 300 above and below are opposite to each other, and the adjacent heating chamber shells 200 above and below among the multiple layers of heating chamber shells 200 are arranged offset in the vertical direction, which can make the spatial layout of the entire closed solid material MVR drying system reasonable and regular, and save layout space.
[0042] In addition, the closed bin 100 is a heat-insulating material bin, that is, the bin wall of the closed bin 100 itself has a heat-insulating function; alternatively, the closed solid material MVR drying system includes a heat-insulating layer provided on at least one of the outer surface and the inner surface of the closed bin 100, which facilitates the closed bin 100 to lock in heat and improve the effect of drying the solid material with heat.
[0043] See Figures 1 to 3 , according to an embodiment of the present application, the material pushing mechanism 300 includes a sliding frame 301, a scraper 302, and a stop block 303. The sliding frame 301 is horizontally reciprocally slidably installed in the closed bin 100. The scraper 302 is hinged below the sliding frame 301. The stop block 303 is provided below the sliding frame 301 and on one side of the scraper 302. When the sliding frame 301 moves horizontally along the first direction S1 (specifically visible in Figure 2 ), the scraper 302 is blocked by the stop block 303 to scrape the material on the heating chamber housing 200 along the first direction S1. When the sliding frame 301 moves horizontally along the second direction S2 opposite to the first direction S1 (specifically visible in Figure 3 ), the scraper 302 is lifted by the material on the heating chamber housing 200 and does not scrape the material.
[0044] According to another embodiment of the present application, the material pushing mechanism 300 includes a sliding frame 301, a scraper 302, and a stop member (not shown) provided on the scraper 302. The sliding frame 301 is horizontally reciprocally slidably installed in the closed bin 100. The scraper 302 is hinged below the sliding frame 301. The stop block 303 is provided below the sliding frame 301 and on one side of the scraper 302. When the sliding frame 301 moves horizontally along the first direction, the stop member stops against the sliding frame 301 to make the scraper 302 scrape the material on the heating chamber housing 200 along the first direction. When the sliding frame 301 moves horizontally along the second direction opposite to the first direction, the scraper 302 is lifted by the material on the heating chamber housing 200 and does not scrape the material.
[0045] According to a specific embodiment of the present application, the sliding frame 301 corresponding to the uppermost material pushing mechanism 300 in the multi-layer material pushing mechanism 300 is horizontally reciprocally slidably installed below the upper bin wall of the closed bin 100. The sliding frames 301 corresponding to the material pushing mechanisms 300 below the uppermost material pushing mechanism 300 are horizontally reciprocally slidably installed below the respective heating chamber housings 200 in a one-to-one correspondence.
[0046] According to a specific embodiment of the present application, suspension rails 2 are installed below the upper bin wall and below the respective heating chamber housings 200. Suspension wheels 4 that can be horizontally reciprocally slidably installed in the corresponding suspension rails 2 are provided above the sliding frame 301. Of course, the installation positions of the suspension rails 2 and the suspension wheels 4 can be interchanged.
[0047] SeeFigure 1 and Figure 4 In addition, the sliding frame 301 is connected with a push rod 3 extending out of the closed bin 100. Specifically, the two ends of the sliding frame 301 may be respectively connected with a push rod 3 extending out of the closed bin 100, or only one end of the sliding frame 301 may be connected with the push rod 3. The push rod 3 can drive the sliding frame 301 to reciprocate 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 a gear rack mechanism, a lead screw mechanism, etc. that can convert rotational motion into linear motion to drive the push rod 3 to reciprocate horizontally.
[0048] See Figure 1 , in order to prevent air from being mixed into the closed bin 100 through the material inlet 101 and the material outlet 102, a feeding valve 5 may be connected to the material inlet 101, and a discharging valve 6 may be connected to the material outlet 102.
[0049] See Figure 1 , according to a specific embodiment of the present application, the closed solid material MVR drying system includes an input pipe 7. One end of the input pipe 7 communicates with the upper part inside the closed bin 100, and the other end of the input pipe 7 communicates with the air inlet of the steam compressor 1; the closed solid material MVR drying system further includes a plurality of output branch pipes 8 and an output main pipe 9 connected to the air outlet of the steam compressor 1. Each output branch pipe 8 communicates with the output main pipe 9 and corresponds to and communicates with each steam heating chamber 201 one by one.
[0050] See Figure 1 , in addition, one end of each steam heating chamber 201 away from the corresponding output branch pipe 8 may also communicate with a condensate discharge pipe 10 and a condensate gas discharge pipe 11 for discharging condensate water and condensate gas in the steam heating chamber 201. The condensate water discharge pipe 10 and the condensate gas discharge pipe 11 may be integrated on the same pipe or may be different pipes. At the same time, in order to further save drying energy consumption, the condensate water discharge pipe and the condensate gas discharge pipe may also be connected to a heat exchanger, and the condensate water and cold and warm air are used in the heat exchanger to preheat the incoming material to achieve the purpose of energy saving.
[0051] 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. A closed solid material MVR drying system, characterized in that, Comprising: A closed bin, the upper end of the closed bin is provided with a material inlet, and the lower end of the closed bin is provided with a material outlet; A plurality of layers of heating chamber outer shells arranged in sequence from top to bottom inside the closed bin, and the heating chamber outer shells enclose a steam heating chamber; A plurality of layers of material pushing mechanisms arranged in sequence from top to bottom inside the closed bin, each of the material pushing mechanisms is correspondingly located above each of the heating chamber outer shells, and the material entering the closed bin from the material inlet can reach the material outlet from top to bottom in sequence through the upper surfaces of each layer of the heating chamber outer shells under the pushing of each layer of the material pushing mechanisms; A steam compressor, the air inlet of the steam compressor is communicated with the upper part inside the closed bin, and the air outlet of the steam compressor is communicated with each of the steam heating chambers.
2. The closed solid material MVR drying system according to claim 1, wherein, The upper part of the closed bin is provided with a steam outlet, and the air inlet of the steam compressor is connected with the upper part inside the closed bin through the steam outlet.
3. The closed solid material MVR drying system according to claim 1, wherein, The pushing directions of two adjacent material pushing mechanisms up and down are opposite to each other, and two adjacent heating chamber outer shells in the plurality of layers of heating chamber outer shells are arranged in a staggered manner in the vertical direction.
4. The closed solid material MVR drying system according to claim 1, wherein The material pushing mechanism includes a sliding frame, a scraping plate and a stop block. The sliding frame is horizontally reciprocatingly slidably installed inside the closed bin. The scraping plate is hinged below the sliding frame. The stop block is arranged below the sliding frame and on one side of the scraping plate. When the sliding frame moves horizontally in the first direction, the scraping plate is blocked by the stop block to scrape the material on the heating chamber outer shell in the first direction. When the sliding frame moves horizontally in the second direction opposite to the first direction, the scraping plate is lifted by the material on the heating chamber outer shell and does not scrape the material.
5. The closed solid material MVR drying system according to claim 1, wherein The closed bin is a heat-insulating material bin; or, the closed solid material MVR drying system includes a heat-insulating layer provided on at least one of the outer surface and the inner surface of the closed bin.
6. The closed solid material MVR drying system according to claim 4, wherein The sliding frame corresponding to the uppermost layer of the material pushing mechanisms in the plurality of layers of material pushing mechanisms is horizontally reciprocatingly slidably installed below the upper bin wall of the closed bin, and the sliding frames corresponding to the material pushing mechanisms below the uppermost layer of the material pushing mechanisms are horizontally reciprocatingly slidably installed below each layer of heating chamber outer shells correspondingly and one by one.
7. The closed solid material MVR drying system according to claim 6, characterized in that, Railings are installed below the upper bin wall and below each layer of heating chamber outer shells, and a hanging wheel that can be horizontally reciprocatingly slidably installed in the corresponding railing is provided above the sliding frame.
8. The closed solid material MVR drying system according to claim 4, wherein, The sliding frame is connected with a push rod extending out of the closed bin.
9. The closed solid material MVR drying system according to any one of claims 1 to 8, characterized in that, The material inlet is connected with a feeding valve, and the material outlet is connected with a discharging valve.
10. The closed solid material MVR drying system according to any one of claims 1 to 8, characterized in that, The closed solid material MVR drying system includes an input pipe, one end of the input pipe is communicated with the upper part inside the closed bin, and the other end of the input pipe is communicated with the air inlet of the steam compressor; the closed solid material MVR drying system further includes a plurality of output branch pipes and an output main pipe connected to the air outlet of the steam compressor. Each of the output branch pipes is communicated with the output main pipe and is correspondingly communicated with each steam heating chamber one by one.