Solid material MVR drying system

Abstract

The utility model relates to the technical field of solid material drying equipment, and provides a solid material MVR drying system which comprises a multi-layer material horizontal conveying mechanism, the material horizontal conveying mechanism comprises a shell forming a conveying cavity and a pushing piece located in the conveying cavity, and a material inlet is formed in the upper portion of the first end of the shell; a material outlet is formed in the lower portion of the second end of the shell, and the pushing piece can push materials to the material outlet. The steam heating cavities are connected to the lower portions of the shells of the material horizontal conveying mechanisms in a one-to-one correspondence mode; the moisture evaporation cavities are connected to the upper portions of the shells of the material horizontal conveying mechanisms in a one-to-one correspondence mode; and an air inlet of the steam compressor communicates with all the water evaporation cavities, and an air outlet of the steam compressor communicates with all the steam heating cavities. According to the system, continuous efficient drying of solid materials can be achieved while continuous production is conducted, latent heat of steam can be used for multiple times to conduct material drying, and the energy-saving effect is obvious.

Description

Technical Field

[0001] The present application relates to the technical field of solid material drying equipment, and more specifically, to a 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 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. 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, low material drying efficiency, high drying energy consumption, and inconvenience for continuous production. Summary of the Utility Model

[0003] In view of this, the present application provides a 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] On the one hand, the present application provides a solid material MVR drying system, including:

[0005] A multi-layer material horizontal conveying mechanism arranged successively from top to bottom. The material horizontal conveying mechanism includes a housing forming a conveying cavity and a pushing member located in the conveying cavity. The upper part of the first end of the housing has a material inlet, and the lower part of the second end of the housing has a material outlet. The pushing member can push the material entering from the material inlet to the material outlet. The material inlet of the lower material horizontal conveying mechanism in the upper and lower adjacent two material horizontal conveying mechanisms is communicated with the material outlet of its upper material horizontal conveying mechanism;

[0006] A plurality of steam heating cavities, each of which is connected to the lower part of the housing of each material horizontal conveying mechanism one by one and is isolated from the conveying cavity of the corresponding material horizontal conveying mechanism;

[0007] A plurality of moisture evaporation cavities, each of which is connected to the upper part of the housing of each material horizontal conveying mechanism one by one and is communicated with the conveying cavity of the corresponding material horizontal conveying mechanism;

[0008] A steam compressor, the air inlet of which is communicated with each moisture evaporation cavity, and the air outlet of which is communicated with each steam heating cavity.

[0009] Furthermore, the solid material MVR drying system includes a heating chamber outer shell connected to the lower part of the housing of each of the material horizontal conveying mechanisms, and the heating chamber outer shell and the lower part of the housing of the corresponding material horizontal conveying mechanism enclose the corresponding steam heating chamber.

[0010] Furthermore, the solid material MVR drying system includes an evaporation chamber outer shell connected to the upper part of the housing of each of the material horizontal conveying mechanisms, and the evaporation chamber outer shell and the upper part of the housing of the corresponding material horizontal conveying mechanism enclose the corresponding moisture evaporation chamber.

[0011] Furthermore, an air vent is provided in the upper part of the housing, and the air vent communicates the conveying chamber with the moisture evaporation chamber above it.

[0012] Furthermore, a plurality of air vents are arranged along the axial direction of the housing, and also arranged in a direction around the axis of the housing.

[0013] Furthermore, the conveying directions of two adjacent material horizontal conveying mechanisms, one above the other, are opposite to each other.

[0014] Furthermore, a feeding valve is connected to the material inlet of the topmost material horizontal conveying mechanism in the multi-layer material horizontal conveying mechanisms, and a discharging valve is connected to the material outlet of the bottommost material horizontal conveying mechanism in the multi-layer material horizontal conveying mechanisms.

[0015] Furthermore, the solid material MVR drying system includes a plurality of input branch pipes and an input main pipe connected to the air inlet of the steam compressor. Each of the input branch pipes communicates with the input main pipe and communicates with each moisture evaporation chamber in a one-to-one correspondence; the solid material MVR drying system also 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 a one-to-one correspondence.

[0016] Furthermore, the material horizontal conveying mechanism is a screw conveyor, and the pushing member is a blade extending spirally.

[0017] Furthermore, the screw conveyor is a shaftless screw conveyor.

[0018] The beneficial effects of the solid material MVR drying system provided by this application are as follows:

[0019] In the solid material MVR drying system provided by the present application, due to the setting of a multi-layer material horizontal conveying mechanism, a moisture evaporation chamber, a steam heating chamber, and a steam compressor, when the solid material enters from the material inlet of the top-layer material horizontal conveying mechanism and moves forward under the pushing of the pusher (specifically, from the first end of the housing to the second end of the housing in the conveying chamber), and falls into the material inlet of the lower-layer material horizontal conveying mechanism from the material outlet of the upper-layer material horizontal conveying mechanism. Since the solid material moves from the first end of the housing to the second end of the housing in the conveying chamber, during the operation process, it is heated by the heat generated by the steam heating chamber below and undergoes negative pressure evaporation by the moisture evaporation chamber above. The moisture inside the solid material continuously evaporates and dries, and finally is discharged from the bottom-layer material horizontal conveying mechanism. The steam compressor continuously sucks steam from the moisture evaporation chamber and pressurizes it and sends 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 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 technologies such as direct electric heating or other fuel heating methods for material drying, the energy-saving effect is more obvious. The drying system provided by the present 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 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.

[0021] Figure 1 It is a schematic structural diagram of the solid material MVR drying system provided by an embodiment of the present application;

[0022] Figure 2 It is a cross-sectional view of the material horizontal conveying mechanism in the solid material MVR drying system provided by an embodiment of the present application.

[0023] The details of the reference numerals involved in the above drawings are as follows:

[0024] 1 - Pusher; 2 - Steam compressor; 3 - Motor; 4 - Feeding valve; 5 - Discharging valve; 6 - Input branch pipe; 7 - Input main pipe; 8 - Output main pipe; 9 - Output branch pipe; 10 - Condensate discharge pipe; 11 - Condensate gas discharge pipe; 100 - Material horizontal conveying mechanism; 101 - Conveying cavity; 102 - Housing; 103 - Material inlet; 104 - Material outlet; 105 - Vent port; 200 - Heating cavity housing; 201 - Steam heating cavity; 300 - Evaporation cavity housing; 301 - Moisture evaporation cavity. Detailed implementation manners

[0025] 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 accompanying 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.

[0026] 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.

[0027] 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 accompanying 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.

[0028] 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 of" means two or more unless otherwise specifically defined.

[0029] 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.

[0030] See Figure 1 and Figure 2 , an embodiment of the present utility model provides a solid material MVR drying system, including:

[0031] A multi-layer material horizontal conveying mechanism 100 arranged successively from top to bottom can be specifically erected layer by layer on a support frame (not shown). The material horizontal conveying mechanism 100 includes a housing 102 forming a conveying cavity 101 and a pushing member 1 located in the conveying cavity 101. The upper part of the first end of the housing 102 has a material inlet 103, and the lower part of the second end of the housing 102 has a material outlet 104. The pushing member 1 can push the material entering from the material inlet 103 to the material outlet 104. The material inlet 103 of the lower material horizontal conveying mechanism 100 among two adjacent upper and lower material horizontal conveying mechanisms 100 is communicated with the material outlet 104 of the upper material horizontal conveying mechanism 100;

[0032] A plurality of steam heating chambers 201, each steam heating chamber 201 is connected to the lower part of the housing 102 of each material horizontal conveying mechanism 100 in a one-to-one correspondence and is isolated from the conveying cavity 101 of the corresponding material horizontal conveying mechanism 100;

[0033] A plurality of moisture evaporation chambers 301, each moisture evaporation chamber 301 is connected to the upper part of the housing 102 of each material horizontal conveying mechanism 100 in a one-to-one correspondence and is communicated with the conveying cavity 101 of the corresponding material horizontal conveying mechanism 100;

[0034] A steam compressor 2, the inlet of the steam compressor 2 is communicated with each moisture evaporation chamber 301, and the outlet of the steam compressor 2 is communicated with each steam heating chamber 201. The steam compressor 2 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 of the process or project.

[0035] In the solid material MVR drying system provided by the present application, since a multi-layer material horizontal conveying mechanism 100, a water evaporation chamber 301, a steam heating chamber 201 and a steam compressor 2 are provided, when the solid material enters from the material inlet 103 of the uppermost material horizontal conveying mechanism 100, it moves forward (specifically, from the first end of the shell 102 to the second end of the shell 102 in the conveying chamber 101) under the pushing of the pushing member 1, and falls from the material outlet 104 of the upper material horizontal conveying mechanism 100 into the material inlet 103 of the lower material horizontal conveying mechanism 100. Since the solid material moves from the first end of the shell 102 to the second end of the shell 102 in the conveying chamber 101, during operation, it is heated by the heat generated by the steam heating chamber 201 below and the negative pressure evaporation effect of the water evaporation chamber above, and the water inside the solid material is continuously evaporated and dried, and finally discharged from the lowermost material horizontal conveying mechanism 100. The steam compressor continuously inhales steam from the water evaporation chamber and pressurizes it into the steam heating chamber, and the secondary steam condensation process releases a large amount of heat for the evaporation of the material water. The solid material MVR drying system makes the solid material "flow", ensuring that the system can achieve continuous and efficient drying of solid materials while achieving continuous production. It can use the latent heat of steam to dry materials multiple times. Compared with technologies such as direct electric heating to dry materials, it has obvious energy-saving effects.

[0036] MVR (mechanical vapor recompression) is the abbreviation of mechanical vapor recompression 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 direct electric heating is used to evaporate one ton of water, it will consume about 700 degrees of electricity, while using MVR drying only consumes 20-60 degrees of electricity.

[0037] According to one embodiment of the present application, the horizontal material conveying mechanism 100 is an auger (also commonly known as a screw conveyor), and the pushing member 1 is a blade extending in a spiral shape, and the blade is transmission-connected to a motor 3 installed outside the shell 102. More specifically, the blade extends in a spiral shape from a first end of the shell 102 to its second end.

[0038] Of course, the material horizontal conveying mechanism 100 in this embodiment is not limited to being an auger, but may also be any suitable horizontal conveying device with similar structure and function.

[0039] According to a preferred embodiment of the present application, the auger is a shaftless auger, but the case of a shafted auger is not excluded.

[0040] According to specific embodiments of the present application, the solid material MVR drying system includes a heating chamber outer shell 200 connected below the housing 102 of each material horizontal conveying mechanism 100. The heating chamber outer shell 200 and the lower part of the housing 102 of the corresponding material horizontal conveying mechanism 100 enclose a corresponding steam heating chamber 201.

[0041] According to specific embodiments of the present application, the solid material MVR drying system includes an evaporation chamber outer shell 300 connected above the housing 102 of each material horizontal conveying mechanism 100. The evaporation chamber outer shell 300 and the upper part of the housing 102 of the corresponding material horizontal conveying mechanism 100 enclose a corresponding moisture evaporation chamber 301.

[0042] According to an embodiment of the present application, an air vent 105 is provided in the upper part of the housing 102. The air vent 105 communicates the conveying chamber 101 with the moisture evaporation chamber 301 above it. Specifically, a plurality of air vents 105 may be arranged along the axial direction of the housing 102, and a plurality of air vents 105 may also be arranged along the direction of surrounding the axis of the housing 102, so as to better communicate the conveying chamber 101 with the moisture evaporation chamber 301 above it.

[0043] According to an embodiment of the present application, the conveying directions of two adjacent material horizontal conveying mechanisms 100 above and below are opposite to each other. In this way, it is convenient for the material horizontal conveying mechanism 100 below the uppermost material horizontal conveying mechanism 100 in the multi-layer material horizontal conveying mechanism 100 to be arranged directly below the uppermost material horizontal conveying mechanism 100, which can make the spatial layout of the entire solid material MVR drying system reasonable and regular, and save layout space.

[0044] In addition, a feeding valve 4 is connected to the material inlet 103 of the uppermost material horizontal conveying mechanism 100 in the multi-layer material horizontal conveying mechanism 100, and a discharging valve 5 is connected to the material outlet 104 of the lowermost material horizontal conveying mechanism 100 in the multi-layer material horizontal conveying mechanism 100.

[0045] According to specific embodiments of the present application, the solid material MVR drying system includes a plurality of input branch pipes 6 and an input main pipe 7 connected to the air inlet of the steam compressor 2. Each input branch pipe 6 is communicated with the input main pipe 7 and is correspondingly communicated with each moisture evaporation chamber 301; the solid material MVR drying system further includes a plurality of output branch pipes 9 and an output main pipe 8 connected to the air outlet of the steam compressor 2. Each output branch pipe 9 is communicated with the output main pipe 8 and is correspondingly communicated with each steam heating chamber 201.

[0046] One end of each steam heating chamber 201 far away from the corresponding output branch pipe 9 can also be connected to a condensate discharge pipe 10 and a condensate gas discharge pipe 11, so as to discharge the condensate water and condensate gas in the steam heating chamber 201. At the same time, in order to further save drying energy consumption, the condensate water discharge pipe and the condensate gas discharge pipe can also be connected to a heat exchanger, and the incoming materials can be preheated by using the condensate water and cold and warm air in the heat exchanger to achieve the purpose of energy conservation.

[0047] 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 solid material MVR drying system, comprising: A multi-layer material horizontal conveying mechanism arranged successively from top to bottom. The material horizontal conveying mechanism includes a housing forming a conveying cavity and a pushing member located in the conveying cavity. The upper part of the first end of the housing has a material inlet, and the lower part of the second end of the housing has a material outlet. The pushing member can push the material entering from the material inlet to the material outlet. The material inlet of the lower material horizontal conveying mechanism among two adjacent material horizontal conveying mechanisms is communicated with the material outlet of its upper material horizontal conveying mechanism; A plurality of steam heating cavities, each of which is correspondingly connected below the housing of each material horizontal conveying mechanism and is isolated from the conveying cavity of the corresponding material horizontal conveying mechanism; A plurality of moisture evaporation cavities, each of which is correspondingly connected above the housing of each material horizontal conveying mechanism and is communicated with the conveying cavity of the corresponding material horizontal conveying mechanism; A steam compressor, the inlet of which is communicated with each moisture evaporation cavity, and the outlet of which is communicated with each steam heating cavity.

2. The solid material MVR drying system according to claim 1, wherein The solid material MVR drying system includes a heating cavity housing connected below the housing of each material horizontal conveying mechanism, and the heating cavity housing and the lower part of the housing of the corresponding material horizontal conveying mechanism enclose the corresponding steam heating cavity.

3. The solid material MVR drying system according to claim 1, characterized in that, The solid material MVR drying system includes an evaporation cavity housing connected above the housing of each material horizontal conveying mechanism, and the evaporation cavity housing and the upper part of the housing of the corresponding material horizontal conveying mechanism enclose the corresponding moisture evaporation cavity.

4. The solid material MVR drying system according to claim 3, wherein, An air vent is provided in the upper part of the housing, and the air vent communicates the conveying cavity with the moisture evaporation cavity above it.

5. The solid material MVR drying system according to claim 4, wherein A plurality of air vents are arranged along the axial direction of the housing, and a plurality of air vents are also arranged along the direction of surrounding the axis of the housing.

6. The solid material MVR drying system according to any one of claims 1 to 5, characterized in that, The conveying directions of two adjacent material horizontal conveying mechanisms from top to bottom are opposite.

7. The solid material MVR drying system according to any one of claims 1 to 5, characterized in that, A feeding valve is connected to the material inlet of the uppermost material horizontal conveying mechanism in the multi-layer material horizontal conveying mechanism, and a discharging valve is connected to the material outlet of the lowermost material horizontal conveying mechanism in the multi-layer material horizontal conveying mechanism.

8. The solid material MVR drying system according to any one of claims 1 to 5, characterized in that The solid material MVR drying system includes a plurality of input branch pipes and an input main pipe connected to the inlet of the steam compressor. Each input branch pipe is communicated with the input main pipe and is correspondingly communicated with each moisture evaporation cavity; the solid material MVR drying system further includes a plurality of output branch pipes and an output main pipe connected to the outlet of the steam compressor. Each output branch pipe is communicated with the output main pipe and is correspondingly communicated with each steam heating cavity.

9. The solid material MVR drying system according to any one of claims 1 to 5, characterized in that, The material horizontal conveying mechanism is a screw conveyor, and the pushing member is a blade extending spirally.

10. The solid material MVR drying system according to claim 9, wherein The screw conveyor is a shaftless screw conveyor.

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