Coal drying device in hopper scale based on freeze drying principle

Abstract

The invention relates to the technical field of coal drying, in particular to a coal drying device in a bucket scale based on the freeze drying principle, which comprises a coal weighing assembly, a coal conveying assembly, a coal conveying assembly, a coal conveying assembly, a coal conveying assembly, a coal conveying assembly and a coal conveying assembly, the temperature adjusting assembly comprises a cooling part and a pressure reducing part, the cooling part is arranged on the transfer part, and the pressure reducing part is arranged on the transfer part; and the drying assembly comprises a coal storage part, a heating part and a condensation part, the coal storage part is arranged on the transfer part, the heating part is arranged on the transfer part, the transfer part is arranged on the transfer part, and the coal weighing assembly, the temperature adjusting assembly and the drying assembly are matched with one another to form the complete drying device. The improved process can thoroughly solve the problem of freezing of the coal in winter, does not influence the coal, and realizes drying of the coal by utilizing the three-phase equilibrium characteristic of water in vacuum and low-temperature environments.

Description

Technical Field

[0001] The invention relates to the technical field of coal drying, and in particular to a coal drying device in a bucket scale based on the freeze drying principle. Background Art

[0002] During the actual coal verification, large-scale freezing often occurs in winter due to the high moisture content of coal. This situation is more serious during the actual coal verification. The bucket scale for actual coal verification is a closed environment and is difficult to enter. When freezing occurs, the coal can only be loosened by multiple vibrations and adjustment of the discharge door, which is a "symptomatic treatment". It can still play a certain role when the coal freezing is relatively light, but when the amount of coal put in is too much (more than 20t) and it stays in the bucket for a long time, it may cause large-scale freezing. At this time, it is difficult to lower the coal by vibration or adjusting the discharge door. If the operation is too frequent, it is easy to overheat the vibration device and the discharge door, and even cause a large amount of coal to rush into the belt below in a short time, causing damage to the equipment. Therefore, this problem needs to be solved. Summary of the invention

[0003] In view of the above-mentioned problem that the moisture content of coal is high during actual coal verification in winter, large-scale freezing often occurs, and the coal is difficult to be lowered, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a device for drying coal in a bucket based on the freeze drying principle.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0006] A coal weighing assembly comprises a transporting member, a transfer member and a rotating member, wherein the transfer member and the rotating member are arranged on the transporting member;

[0007] a temperature regulating component, comprising a cooling component and a vacuum component, wherein the cooling component is arranged on the transport component, and the vacuum component is arranged on the transport component; and

[0008] The drying component comprises a coal storage component, a heating component and a condensing component. The coal storage component is arranged on the transfer component, the heating component is arranged on the transfer component, and the transfer component is arranged on the transfer component.

[0009] As a preferred solution of the coal drying device in a bucket scale based on the freeze-drying principle described in the present invention, the transport component includes a coal pipeline for transporting coal, a belt scale fixedly connected to the coal pipeline, and a first belt arranged on the belt scale.

[0010] As a preferred solution of the freeze-drying principle-based coal drying device in the bucket scale described in the present invention, the transfer component includes a transfer pipeline and a coal plow disposed on the coal pipeline, and a coal storage bin disposed on the transfer pipeline.

[0011] As a preferred solution of the coal drying device in bucket scale based on freeze drying principle described in the present invention, the rotating part includes a bucket wheel machine arranged on the coal storage bin, and the bucket wheel machine directly transfers the coal back to the coal pipeline.

[0012] As a preferred solution of the coal drying device in the bucket scale based on the freeze-drying principle described in the present invention, the cooling component includes a liquid nitrogen delivery pipe arranged in the coal storage bin, a liquid nitrogen electric door arranged on the liquid nitrogen delivery pipe, and a liquid nitrogen tank fixedly connected to the liquid nitrogen delivery pipe.

[0013] As a preferred solution of the coal drying device in a bucket scale based on the freeze-drying principle described in the present invention, the vacuum component includes a suction pipe arranged in the coal storage bin, a vacuum electric door arranged on the suction pipe, and a vacuum pump fixedly connected to the suction pipe.

[0014] As a preferred solution of the freeze-drying principle-based coal drying device in the bucket according to the present invention, turning on the vacuum pump will reduce the pressure in the coal storage bin to between 20Pa-30Pa, and air is sucked into the coal storage bin to form a vacuum state.

[0015] As a preferred solution of the freeze-drying principle-based coal drying device in the bucket scale of the present invention, the coal storage part includes a coal conveying pipeline arranged in the coal storage bin and an electric coal conveying door arranged on the coal conveying pipeline.

[0016] As a preferred solution of the freeze-drying principle-based coal drying device in the bucket scale of the present invention, the heating element includes a heating wire arranged on the coal storage bin, and the heating wire is evenly arranged in a ring shape around the coal storage bin.

[0017] As a preferred solution of the coal drying device in a bucket scale based on the freeze-drying principle described in the present invention, the condensing component includes a condensing pipe arranged on the coal storage bin, a condensing electric door arranged on the condensing pipe, and a condensing box fixedly connected to the condensing pipe.

[0018] The beneficial effects of the present invention are as follows: a complete drying device is formed by the mutual cooperation between the coal weighing component, the temperature regulating component and the drying component. The improved process can completely solve the problem of coal freezing in winter and will not affect the coal itself. The improved process innovatively uses the "freeze-drying" technology in the food and other fields, and utilizes the three-phase equilibrium characteristics of water in a vacuum and low-temperature environment to achieve coal drying, which contributes to ensuring the operation of the equipment, reducing the calibration pressure, improving work efficiency, and reducing the burden on the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 The present invention is a schematic diagram of the overall structure of a coal drying device in a bucket scale based on the freeze drying principle.

[0021] Figure 2 The present invention is a schematic diagram of the structure of a coal weighing component of a coal drying device in a bucket weighing scale based on the freeze drying principle.

[0022] Figure 3 It is a schematic diagram of a partial structure of a half-section of a coal drying device in a bucket scale based on the freeze-drying principle of the present invention.

[0023] Figure 4 The present invention is a three-phase diagram of water in a bucket scale coal drying device based on the freeze drying principle. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Example 1

[0029] Reference Figure 1 - Figure 3 , which is the first embodiment of the present invention, provides a coal drying device in a bucket scale based on the freeze-drying principle, the device includes a coal weighing assembly 100, including a transport part 101, a transfer part 102 and a rotating part 103, the transport part 102 and the rotating part 103 are arranged on the transport part 101, and through the interaction and cooperation between the transport part 101, the transfer part 102 and the rotating part 103, the actual coal verification of the belt scale 101b can be realized.

[0030] Specifically, the transport component 101 includes a coal pipeline 101a for transporting coal. There are several belts in the coal pipeline 101a for circulating coal. The coal pipeline 101a is a semi-enclosed space, so that the coal will not be exposed to the outside, increasing the water content in the coal. A belt scale 101b is fixedly connected to the coal pipeline 101a. The belt scale 101b is fixed on one side of the coal pipeline 101a to continuously weigh the coal. A first belt 101c is arranged on the belt scale 101b. The first belt 101c is arranged in the coal pipeline 101a and will allow the belt scale 101b to weigh the coal thereon when it is in operation.

[0031] Furthermore, the transfer member 102 includes a transfer pipe 102a and a coal plow 102b disposed on the coal pipe 101a. The transfer pipe 102a is fixedly connected to the bottom of the coal pipe 101a, so that the coal on the first belt 101c can fall onto the transfer pipe 102a for subsequent operations. The coal plow 102b is fixedly connected to the coal pipe 101a and disposed on one side of the belt scale 101b. After the coal passes through the belt scale 101b, the coal plow 102b plows the coal into the transfer pipe. In the transfer pipeline 102a, a coal storage bin 102c is arranged on the transfer pipeline 102a. The coal storage bin 102c is fixedly connected to the transfer pipeline 102a, and the coal storage bin 102c is located at the lower side of the transfer pipeline 102a, so that the coal in the transfer pipeline 102a can fall into the coal storage bin 102c. The coal storage bin 102c is also a bucket scale, which is used to store the coal falling from the transfer pipeline 102a. The coal that needs to be dried is stored in the coal storage bin 102c, and the coal storage electric door is closed after it is determined to be completely sealed.

[0032] Furthermore, the rotating member 103 includes a bucket wheel machine 103a disposed on the coal storage bin 102c. The bucket wheel machine 103a directly transfers the coal back to the coal pipeline 101a. After the metering and weighing in the coal storage bin 102c is completed, the coal is transported back to the coal pipeline 101a through the bucket wheel machine 103a.

[0033] During operation, the actual coal verification of the belt scale 101b is roughly to lay two belts in the coal pipeline 101a of the first belt 101c. After the coal passes through the belt scale 101b, the coal plow 102b plows the coal through the transfer pipeline 102a into the coal storage bin 102c below. After the measurement and weighing are completed, it is put back into the coal pipeline 101a through the bucket wheel excavator 103a. The coal that needs to be dried can be stored in the coal storage bin 102c, and the electric door of the coal storage is closed after it is confirmed to be completely sealed.

[0034] Example 2

[0035] Reference Figure 1 - Figure 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: this device includes a temperature adjustment component 200, including a cooling component 201 and a vacuum component 202. The cooling component 201 is arranged on the transfer component 102, and the vacuum component 202 is arranged on the transfer component 102. The coal containing a large amount of water can be cooled and frozen into a solid in advance by the cooling component 201 and the vacuum component 202, and then the water vapor is sublimated directly from the solid under vacuum conditions, while the substance itself remains in the frozen ice shelf, so that the dried product does not lose the original solid skeleton structure and maintains the original shape of the material.

[0036] Specifically, the cooling component 201 includes a liquid nitrogen delivery pipe 201a arranged in the coal storage bin 102c, a liquid nitrogen electric door 201b arranged on the liquid nitrogen delivery pipe 201a, and a liquid nitrogen tank 201c fixedly connected to the liquid nitrogen delivery pipe 201a. The liquid nitrogen in the liquid nitrogen tank 201c can be controlled by the liquid nitrogen electric door 201b on the liquid nitrogen delivery pipe 201a. When it is opened, the liquid nitrogen can flow into the coal storage bin 102c to quickly cool the coal so that the moisture between the coal quickly turns into ice crystals. The purpose of rapid freezing is to turn the water content in the coal into small ice crystals in a short time. Generally speaking, the faster the cooling speed and the lower the supercooling temperature, the more crystal nuclei are formed, and the crystals are frozen before they have time to grow. At this time, the more grains are formed and the finer the grains; on the contrary, the fewer the grains, the larger the grains, and the finer the ice particles are more conducive to the sublimation step.

[0037] Furthermore, the vacuum component 202 includes an air suction pipe 202a disposed on the coal storage bin 102c, the air suction pipe 202a is fixedly connected to the left or right side of the coal storage bin 102c, so that it will not affect the coal entering the coal storage bin 102c, a vacuum electric door 202b disposed on the air suction pipe 202a, a vacuum pump 202c fixedly connected to the air suction pipe 202a, the vacuum pump 202c is fixedly connected to one side of the coal storage bin 102c, and is installed on the same side as the liquid nitrogen tank 201c, so that it is convenient to save space and facilitate synchronous maintenance for long-term use. By opening the vacuum electric door 202b, the air suction pipe 202a fixedly connected to one side of the coal storage bin 102c can be controlled to perform vacuum treatment in the coal storage bin 102c via the vacuum pump 202c.

[0038] Among them, turning on the vacuum pump 202c will reduce the pressure in the coal storage bin 102c to between 20Pa-30Pa, making it easier to suck air into the coal storage bin 102c to form a vacuum state.

[0039] The remaining structure is the same as that of the embodiment.

[0040] Operation process: Open the liquid nitrogen electric door 201b to allow the liquid nitrogen tank 201c to allow liquid nitrogen to enter the coal storage bin 102c from the liquid nitrogen delivery pipe 201a, quickly cool the coal so that the moisture between the coal quickly turns into ice crystals. After a period of time, the vacuum electric door 202b can be opened to start the vacuum pump 202c through the suction pipe 202a to reduce the pressure in the coal storage bin 102c to between 1Pa and 10Pa.

[0041] Example 3

[0042] Reference Figure 1 - Figure 4 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: this device includes a drying component 300, including a coal storage component 301, a heating component 302 and a condensing component 303. The coal storage component 301 is arranged on the transfer component 102, the heating component 302 is arranged on the transfer component 102, and the transfer component 102 is arranged on the transfer component 102. Through the interaction among the coal storage component 301, the heating component 302 and the condensing component 303, the improved process can completely solve the problem of coal freezing in winter without affecting the coal itself.

[0043] Specifically, the coal storage part 301 includes a coal conveying pipeline 301a arranged in the coal storage bin 102c, the coal conveying pipeline 301a is fixedly connected to the upper side of the coal storage bin 102c, and an electric coal conveying door 301b is arranged on the coal conveying pipeline 301a. The electric coal conveying door 301b controls whether the coal in the coal storage pipeline continues to fall into the coal storage bin 102c.

[0044] Furthermore, the heating element 302 includes a heating wire 302a disposed on the coal storage bin 102c. The heating wire 302a is evenly arranged in a ring shape around the coal storage bin 102c. When the heating wire 302a is turned on, the ice crystals formed by the coal can be quickly sublimated into water vapor through a liquid nitrogen pump, while the coal itself remains in the frozen ice shelf, so that the dried product retains its original solid skeleton structure and maintains the original shape of the coal.

[0045] Furthermore, the condensation element 303 includes a condensation pipe 303a arranged on the coal storage bin 102c, and the condensation pipe 303a is fixedly connected to one side of the coal storage bin 102c and is opposite to the vacuum pump 202c, because this also serves as a distinguishing function, and a condensation electric door 303b is arranged on the condensation pipe 303a, and the condensation electric door 303b has a filter screen inside, which is used to filter impurities that may exist in the water vapor, and a condensation box 303c fixedly connected to the condensation pipe 303a, through the heating wire 302a, the ice crystals sublimate into water vapor and can enter the condensation box 303c through the condensation pipe 303a, thereby completing the drying process of the coal;

[0046] Among them, according to the attached Figure 4 As shown in the state equilibrium diagram of water (H2O), substances have three states: solid, liquid and vapor. The state of a substance is related to its temperature and pressure. The three curves OA, OB and OC in the figure respectively represent the relationship between pressure and temperature when ice and water, water and water vapor, and ice and water vapor coexist. They are called melting line, boiling line and sublimation line respectively. These three curves divide the graph into three regions, namely solid phase region, liquid phase region and gas phase region. The intersection point O of the three curves is the state where solid, liquid and vapor exist, called triple point. Its temperature is 0.01℃ and pressure is 610Pa. Below the triple point, there is no liquid phase. If the pressure of the ice surface is kept below 610Pa and the ice is heated, the ice will directly turn into vapor phase without passing through the liquid phase. This process is called sublimation.

[0047] The remaining structure is the same as that of the embodiment.

[0048] Operation steps: Turn on the heating wire 302a to make the ice crystals sublime quickly into water vapor. After the drying is completed, open the condensation electric door 303b, export the ice to the condenser tube and collect it in the condenser box to achieve drying. The product absorbs heat during sublimation drying. It takes about 670 calories of heat to turn one gram of ice into steam. Therefore, the product must be heated during the sublimation stage. This improved process innovatively uses the "freeze-drying" technology in the food and other fields, and uses the three-phase equilibrium characteristics of water in vacuum and low-temperature environments to achieve coal drying, which contributes to ensuring the operation of equipment, reducing calibration pressure, improving work efficiency, and reducing equipment burden.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A coal drying device in a bucket based on the freeze drying principle, characterized in that: include, A coal assembly (100) comprises a transport member (101), a transfer member (102) and a rotating member (103), wherein the transport member (102) and the rotating member (103) are arranged on the transport member (101); A temperature adjustment component (200) comprises a temperature reduction component (201) and a vacuum component (202), wherein the temperature reduction component (201) is arranged on the transport component (102), and the vacuum component (202) is arranged on the transport component (102); and The drying component (300) comprises a coal storage component (301), a heating component (302) and a condensing component (303), wherein the coal storage component (301) is arranged on the transfer component (102), the heating component (302) is arranged on the transfer component (102), and the transfer component (102) is arranged on the transfer component (102).

2. The device for drying coal in a bucket based on the freeze drying principle according to claim 1 is characterized in that: The transport component (101) comprises a coal pipeline (101a) for transporting coal, a belt scale (101b) fixedly connected to the coal pipeline (101a), and a first belt (101c) arranged on the belt scale (101b).

3. The device for drying coal in a bucket based on the freeze drying principle according to claim 2 is characterized in that: The transfer member (102) comprises a transfer pipeline (102a) and a coal plow (102b) arranged on the coal pipeline (101a), and a coal storage bin (102c) arranged on the transfer pipeline (102a).

4. The device for drying coal in a bucket based on the freeze drying principle according to claim 3 is characterized in that: The rotating member (103) includes a bucket wheel machine (103a) disposed on the coal storage bin (102c), and the bucket wheel machine (103a) directly transfers the coal back to the coal pipeline (101a).

5. The device for drying coal in a bucket based on the freeze drying principle according to claim 4 is characterized in that: The cooling element (201) comprises a liquid nitrogen delivery pipe (201a) arranged on the coal storage bin (102c), a liquid nitrogen electric door (201b) arranged on the liquid nitrogen delivery pipe (201a), and a liquid nitrogen tank (201c) fixedly connected to the liquid nitrogen delivery pipe (201a).

6. The device for drying coal in a bucket based on the freeze drying principle according to claim 4 or 5, characterized in that: The vacuum component (202) comprises an air suction pipe (202a) arranged on the coal storage bin (102c), a vacuum electric door (202b) arranged on the air suction pipe (202a), and a vacuum pump (202c) fixedly connected to the air suction pipe (202a).

7. The device for drying coal in a bucket based on the freeze drying principle according to claim 6, characterized in that: Turning on the vacuum pump (202c) will reduce the pressure in the coal storage bin (102c) to between 20Pa and 30Pa, and the coal storage bin (102c) will be inhaled to form a vacuum state.

8. The device for drying coal in a bucket based on the freeze drying principle according to claim 7, characterized in that: The coal storage part (301) comprises a coal conveying pipeline (301a) arranged in the coal storage bin (102c), and a coal conveying electric door (301b) arranged on the coal conveying pipeline (301a).

9. The device for drying coal in a bucket based on the freeze drying principle according to claim 8, characterized in that: The heating element (302) comprises a heating wire (302a) arranged on the coal storage bin (102c), and the heating wire (302a) is evenly arranged in a ring shape around the coal storage bin (102c).

10. The device for drying coal in a bucket based on the freeze drying principle according to claim 9, characterized in that: The condensation component (303) includes a condensation pipe (303a) arranged on the coal storage bin (102c), a condensation electric door (303b) arranged on the condensation pipe (303a), and a condensation box (303c) fixedly connected to the condensation pipe (303a).

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