Coal drying and dewatering device

Abstract

The utility model provides a coal drying and dewatering device which comprises a dewatering tank, a dewatering cavity, a feed port arranged at the top of the dewatering tank, a discharge port arranged at the bottom of the dewatering tank and a gas injection port arranged on the dewatering tank and close to the discharge port, the gas injection port is used for injecting high-temperature water vapor so as to heat and dehydrate the coal in the dehydration cavity; the auxiliary heating part comprises a heating piece, an air inlet pipeline and an air supply pipeline, the air inlet pipeline is connected with the heating piece and the dehydration cavity, the air supply pipeline is connected with the heating piece and the dehydration cavity, and the auxiliary heating part can heat the low-temperature water vapor in the dehydration tank. According to the technical scheme provided by the utility model, the problem of poor water vapor resource utilization rate in the coal drying process in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal drying and dehydration, in particular to a coal drying and dehydration device. Background Art

[0002] In the field of coal drying and dehydration, steam is typically used as the drying medium. Using steam as a drying medium offers low energy consumption, high safety, and environmental friendliness. Existing coal steam drying processes primarily perform solid-gas separation after drying, focusing on evaporated water and volatilized solid particles. Low-temperature steam is not recycled, resulting in poor resource utilization in existing dehydration processes. Utility Model Content

[0003] The utility model provides a coal drying and dehydrating device to solve the problem of poor utilization rate of water vapor resources in the coal drying process in the prior art.

[0004] The utility model provides a coal drying and dehydration device, which includes: a dehydration tank, which has a dehydration chamber, a feed port is provided at the top of the dehydration tank, a discharge port is provided at the bottom of the dehydration tank, and an air injection port is also provided on the dehydration tank, which is arranged close to the discharge port and is used to inject high-temperature water vapor to heat and dehydrate the coal in the dehydration chamber; an auxiliary heating part, which includes a heating element, an air inlet pipeline and an air supply pipeline, the air inlet pipeline is connected to the heating element and the dehydration chamber respectively, and the air supply pipeline is connected to the heating element and the dehydration chamber respectively, and the auxiliary heating part can heat the low-temperature water vapor in the dehydration tank.

[0005] Furthermore, the auxiliary heating portion further includes a low-temperature air storage portion and a high-temperature air storage portion. The low-temperature air storage portion is arranged on the air intake pipeline, and the high-temperature air storage portion is arranged on the air delivery pipeline.

[0006] Furthermore, the dehydration tank includes a feed gate and a discharge gate. The feed gate is arranged at the feed port, and the discharge gate is arranged close to the discharge port. The feed gate, the discharge gate and the dehydration tank cooperate to form a dehydration chamber.

[0007] Furthermore, the coal drying and dehydration device also includes a material basket, which is arranged in the dehydration chamber. The material basket is arranged corresponding to the feed port. The material basket is used to place and unload coal, and water filter holes are evenly distributed on the material basket.

[0008] Furthermore, the dehydration tank also has a discharge chamber, which is located at the bottom of the dehydration chamber. The bottom of the discharge chamber has a discharge port. A recovery port is provided on the side wall of the dehydration tank. The recovery port is connected to the dehydration chamber and is provided close to the discharge gate. The coal drying and dehydration device also includes a recovery component, which is connected to the recovery port. The recovery component is used to collect the solid-liquid mixture in the coal.

[0009] Furthermore, the recovery component includes: a recovery pipeline, one end of which is connected to the recovery port; a recovery pump, which is arranged on the recovery pipeline and is used to absorb the solid-liquid mixture in the dehydration chamber; and a liquid storage part, which is connected to the other end of the recovery pipeline and can store the solid-liquid mixture.

[0010] Furthermore, the cross-sectional size of the discharge chamber gradually decreases in the direction away from the dehydration chamber.

[0011] Furthermore, the coal drying and dehydration device further includes a storage bin, which is arranged at the bottom of the discharge port and is used to store the dehydrated coal.

[0012] Furthermore, the coal drying and dehydration device further includes a steam generator, which is connected to the gas injection port and is used to inject high-temperature steam into the dehydration chamber.

[0013] Furthermore, the dehydration tank is provided with a pressure detection element and a temperature detection element. The pressure detection element is used to detect the pressure in the dehydration chamber, and the temperature detection element is used to detect the temperature in the dehydration chamber. The coal drying and dehydration device also includes a controller, which is electrically connected to the pressure detection element, the temperature detection element, the steam generator and the heating element respectively.

[0014] Using the technical solution of this utility model, the auxiliary heating unit heats the low-temperature steam in the dehydration tank, converting the low-temperature steam and the steam generated during the coal drying process into high-temperature steam, which can then be reintroduced into the dehydration tank for coal drying. This arrangement allows for a significant degree of steam recovery and reuse, promoting recycling, reducing environmental pollution, lowering production costs, enhancing economic benefits, and improving the utilization rate of steam resources in the coal drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 The figure shows the structural diagram of the coal drying and dehydration device provided by the present invention.

[0017] The above drawings include the following reference numerals:

[0018] 10. Dehydration tank;

[0019] 11. Feed gate;

[0020] 12. Discharge gate;

[0021] 20. Auxiliary heating unit;

[0022] 21. Heating element;

[0023] 22. Intake pipe;

[0024] 23. Air supply pipeline;

[0025] 24. Low temperature gas storage unit;

[0026] 25. High temperature gas storage unit;

[0027] 30. Material basket;

[0028] 40. Recycling components;

[0029] 41. Recovery pipeline;

[0030] 42. Recovery pump;

[0031] 43. Liquid storage part;

[0032] 50. Storage silo;

[0033] 60. Steam generator;

[0034] 70. Pressure testing parts;

[0035] 80. Temperature detection components;

[0036] 90. Controller. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a coal drying and dehydration device, which includes a dehydration tank 10 and an auxiliary heating unit 20. The dehydration tank 10 has a dehydration chamber, a feed port is provided at the top of the dehydration tank 10, a discharge port is provided at the bottom of the dehydration tank 10, and an air injection port is also provided on the dehydration tank 10. The air injection port is provided near the discharge port, and the air injection port is used to inject high-temperature water vapor to heat and dehydrate the coal in the dehydration chamber. The auxiliary heating unit 20 includes a heating element 21, an air inlet pipe 22 and an air supply pipe 23. The air inlet pipe 22 is connected to the heating element 21 and the dehydration chamber respectively, and the air supply pipe 23 is connected to the heating element 21 and the dehydration chamber respectively. The auxiliary heating unit 20 can heat the low-temperature water vapor in the dehydration tank 10.

[0039] By applying the technical solution of the present invention, the auxiliary heating unit 20 can heat the low-temperature steam in the dehydration tank 10, converting the low-temperature steam and the steam generated during the coal drying process into high-temperature steam, which can then be reintroduced into the dehydration tank 10 for coal drying. This arrangement allows for a significant degree of water vapor recovery and reuse, promoting recycling, reducing environmental pollution, lowering production costs, enhancing economic benefits, and improving the utilization rate of water vapor resources in the coal drying process.

[0040] The auxiliary heating unit 20 further includes a low-temperature gas storage unit 24 and a high-temperature gas storage unit 25. The low-temperature gas storage unit 24 is disposed on the air inlet line 22, and the high-temperature gas storage unit 25 is disposed on the air delivery line 23. By placing the low-temperature gas storage unit 24 and the high-temperature gas storage unit 25 on separate lines, mixing of water vapors at different temperatures can be avoided, reducing potential safety risks. Separate monitoring and maintenance of the gas storage units is also possible, facilitating the storage and control of water vapor at different temperature requirements, thereby improving the reliability of the device and facilitating maintenance.

[0041] Furthermore, the dehydration tank 10 includes a feed gate 11 and a discharge gate 12. The feed gate 11 is arranged at the feed port, and the discharge gate 12 is arranged near the discharge port. The feed gate 11, the discharge gate 12 and the dehydration tank 10 cooperate to form a closed dehydration chamber. Through the above arrangement, the feed gate 11 and the discharge gate 12 are arranged on the dehydration tank 10, and the undehydrated coal enters the dehydration tank 10 from the feed port through the feed gate 11. After the feed gate 11 and the discharge gate 12 are closed, the dehydration tank 10 is in a sealed state to achieve the necessary environmental conditions for drying the dehydrated coal using high-temperature steam in the dehydration tank 10. After dehydration and drying are completed in the dehydration tank 10, the coal passes through the discharge gate 12 from the discharge port to the storage bin 50. In addition, the gate can be automatically operated by being electrically connected to the controller 90, which can prevent accidental leakage during the dehydration process, reduce the risk of accidents, and improve the safety and efficiency of operation.

[0042] Specifically, the coal drying and dehydration device also includes a material basket 30, which is arranged in the dehydration chamber. The material basket 30 is arranged corresponding to the feed port. The material basket 30 is used to place and unload coal, and the material basket 30 is evenly distributed with water filter holes. Through the above-mentioned arrangement, the arrangement of the material basket 30 can make the input and output of coal more convenient, prevent the coal from directly contacting the tank wall of the dehydration tank 10 and damaging the inner wall of the dehydration tank 10, and the material basket 30 is easy to disassemble and clean, which is beneficial to the cleaning and maintenance of the equipment. In addition, the material basket 30 effectively isolates the dried coal from the solid-liquid mixture, prevents the dried coal from being cleaned twice, and affects production efficiency. In an embodiment of the present application, the material basket 30 is composed of a steel body with circular holes, the diameter of the water filter holes is 1 mm, and the porosity of the steel body reaches 50%, thereby ensuring sufficient contact between steam and coal and improving the coal drying effect.

[0043] like Figure 1 As shown, the dehydration tank 10 also has a discharge chamber, which is located at the bottom of the dehydration chamber. The bottom of the discharge chamber has a discharge port. A recovery port is provided on the side wall of the dehydration tank 10. The recovery port is connected to the dehydration chamber and is provided close to the discharge gate 12. The coal drying and dehydration device also includes a recovery component 40, which is connected to the recovery port. The recovery component 40 can collect solid-liquid mixtures in the coal.

[0044] The solid-liquid mixture consists of liquid water condensed from a small amount of water vapor after drying and dehydration, mixed with small particles of pulverized coal to form a coal-water mixture. This arrangement allows the recovery assembly 40 to collect the solid-liquid mixture from the coal deposited at the bottom of the dehydration chamber in the dehydration tank 10, thereby promoting the clean and efficient use of coal, reducing environmental pollution from the solid-liquid mixture in the coal, and improving coal quality.

[0045] Specifically, the recovery assembly 40 includes a recovery line 41, a recovery pump 42, and a liquid storage unit 43. One end of the recovery line 41 is connected to the recovery port. The recovery pump 42 is mounted on the recovery line 41 and is used to draw the solid-liquid mixture from the dehydration chamber. The liquid storage unit 43 is connected to the other end of the recovery line 41 and is capable of storing the solid-liquid mixture.

[0046] Furthermore, a recovery pump 42 provided on the recovery line 41 sucks the solid-liquid mixture from the bottom of the dehydration chamber and then transports the solid-liquid mixture to the liquid storage portion 43 through the recovery line 41. The liquid storage portion 43 can be used to store the solid-liquid mixture. Furthermore, a coagulant, flocculant, etc. can be added to the liquid storage portion 43 to separate the solid-liquid mixture into usable coal powder and water, which is conducive to the clean and efficient use of coal. The purified water can be reused, reducing resource waste and further improving resource utilization.

[0047] The cross-sectional dimensions of the discharge chamber gradually decrease as it moves away from the dewatering chamber. This gradually decreasing cross-sectional area accelerates coal flow, reducing the likelihood of coal being trapped in the discharge chamber and shortening its stagnation time, thereby improving coal handling efficiency. Furthermore, this reduced cross-sectional area reduces the contact area between the coal and the chamber walls, reducing wear and extending the equipment's service life.

[0048] Furthermore, the coal drying and dehydration device also includes a storage bin 50, which is disposed at the bottom of the discharge port. The storage bin 50 can store the dehydrated coal, facilitating the collection and storage of the dehydrated coal. In other embodiments of the present application, the storage bin 50 can also be a product bin or a coal storage shed, as long as it can store the dried coal products.

[0049] Specifically, the coal drying and dehydration apparatus also includes a steam generator 60, which is connected to the air injection port and is used to inject high-temperature steam into the dehydration chamber. Through this arrangement, the high-temperature steam generated by the steam generator 60 is introduced into the dehydration chamber through the air injection port on the dehydration tank 10. The high-temperature steam generated by the steam generator 60 dries the coal in the dehydration tank 10. The steam generator 60 has a simple structure, low cost, and is easy to operate.

[0050] Among them, the dehydration tank 10 is provided with a pressure detection component 70 and a temperature detection component 80. The pressure detection component 70 is used to detect the pressure in the dehydration chamber, and the temperature detection component 80 is used to detect the temperature in the dehydration chamber. The coal drying and dehydration device also includes a controller 90, which is electrically connected to the pressure detection component 70, the temperature detection component 80, the steam generator 60 and the heating component 21 respectively.

[0051] Through the above-mentioned setting, the pressure detection component 70 can detect the pressure in the dehydration chamber in real time, and the temperature detection component 80 can detect the temperature in the dehydration chamber in real time. The preset drying temperature in the dehydration tank 10 can reach 198°C to 234°C. The pressure detection component 70 detects the amount of high-temperature water vapor required to enter the dehydration tank 10, so that the dehydration tank 10 reaches the pressure conditions for coal drying, and after reaching the preset temperature, the drying is completed after maintaining it for 20 to 30 minutes.

[0052] Furthermore, the controller 90 is electrically connected to the pressure detection element 70, the temperature detection element 80, the steam generator 60, and the heating element 21. With this arrangement, the controller 90 can automatically monitor and adjust the relevant parameters of the pressure detection element 70, the temperature detection element 80, the steam generator 60, and the heating element 21, thereby improving the level of automation, accurately controlling the pressure and temperature, and ensuring the stability of the industrial process and the quality of the product. The controller 90 monitors and records relevant data in real time, making it easier for maintenance personnel to perform fault diagnosis and equipment maintenance. In addition, the controller 90 is also electrically connected to the feed gate 11 and the discharge gate 12 of the dehydration tank 10, as well as various valves, pumps, etc. on the pipeline, and is uniformly controlled by the controller 90, thereby improving the level of production automation and the reliability and safety of the entire device.

[0053] The working process of the device is as follows: first, the feed gate 11 is opened, and the coal to be dried and dehydrated is passed through the chute into the material basket 30 in the dehydration tank 10. After the coal enters the dehydration tank 10, the controller 90 controls the feed gate 11 to automatically close, so that the dehydration tank 10 reaches the sealed environment required for coal drying. The steam generator 60 generates high-temperature steam, so that the drying preset temperature in the dehydration tank 10 can reach 198°C to 234°C. The pressure detection component 70 detects the amount of high-temperature steam required to be introduced, so that the dehydration tank 10 reaches the pressure condition for coal drying, and maintains the temperature for 20 to 30 minutes after reaching the preset temperature to complete the drying. At this time, the coal drying and dehydration is completed. First, the recovery pump 42 is used to pass the solid-liquid mixture at the bottom of the dehydration tank 10 through the recovery pipeline 41 into the liquid storage part 43. Subsequently, coagulants and flocculants can be added to the liquid storage part 43 to separate the solid-liquid mixture into usable coal powder and water, thereby realizing resource recycling. Then the discharge gate 12 is automatically opened, and the dried coal enters the storage bin 50 from the bottom of the dehydration tank 10 through the chute. During this process, the moisture in the coal will evaporate and be removed in the form of water vapor during the drying and dehydration process. This water vapor and the water vapor originally used for drying enter the low-temperature gas storage part 24 through the air inlet pipe 22. The water vapor in the low-temperature gas storage part 24 can be sent to the heating element 21 for heating, so that it is converted into high-temperature water vapor that can dry the coal. It is then transported to the high-temperature gas storage part 25 for storage through the air supply pipe 23. When the coal needs to be dried next time, it will be sent to the dehydration tank 10 through the air supply pipe 23 for coal drying.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0056] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A coal drying and dehydration device, characterized in that: The coal drying and dehydration device comprises: A dehydration tank (10) has a dehydration chamber, a feed port is provided at the top of the dehydration tank (10), a discharge port is provided at the bottom of the dehydration tank (10), and an air injection port is provided on the dehydration tank (10), the air injection port is provided near the discharge port, and the air injection port is used to inject high-temperature steam to heat and dehydrate the coal in the dehydration chamber; An auxiliary heating unit (20) includes a heating element (21), an air intake pipeline (22), and an air supply pipeline (23). The air intake pipeline (22) is connected to the heating element (21) and the dehydration chamber, respectively. The air supply pipeline (23) is connected to the heating element (21) and the dehydration chamber, respectively. The auxiliary heating unit (20) is capable of heating the low-temperature water vapor in the dehydration tank (10).

2. The coal drying and dehydration device according to claim 1, characterized in that: The auxiliary heating portion (20) further comprises a low-temperature gas storage portion (24) and a high-temperature gas storage portion (25); the low-temperature gas storage portion (24) is arranged on the air intake pipeline (22), and the high-temperature gas storage portion (25) is arranged on the air delivery pipeline (23).

3. The coal drying and dehydration device according to claim 1, characterized in that: The dehydration tank (10) comprises a feed gate (11) and a discharge gate (12), wherein the feed gate (11) is arranged at the feed port, and the discharge gate (12) is arranged close to the discharge port. The feed gate (11), the discharge gate (12) and the dehydration tank (10) cooperate to form the dehydration chamber.

4. The coal drying and dehydration device according to claim 3, characterized in that: The coal drying and dehydration device further comprises a material basket (30), the material basket (30) being arranged in the dehydration chamber, the material basket (30) being arranged corresponding to the feed port, the material basket (30) being used for placing and unloading coal, and the material basket (30) being evenly distributed with water filter holes.

5. The coal drying and dehydration device according to claim 3, characterized in that: The dehydration tank (10) further comprises a discharge cavity, the discharge cavity being located at the bottom of the dehydration cavity, the bottom of the discharge cavity being provided with the discharge port, a recovery port being provided on the side wall of the dehydration tank (10), the recovery port being communicated with the dehydration cavity and being provided close to the discharge gate (12), the coal drying and dehydration device further comprising a recovery component (40), the recovery component (40) being connected to the recovery port, and the recovery component (40) being used to collect a solid-liquid mixture in the coal.

6. The coal drying and dehydration device according to claim 5, characterized in that: The recovery assembly (40) comprises: a recovery pipeline (41), one end of the recovery pipeline (41) being in communication with the recovery port; a recovery pump (42), arranged on the recovery pipeline (41), and used for sucking the solid-liquid mixture in the dehydration chamber; The liquid storage part (43) is communicated with the other end of the recovery pipeline (41), and the liquid storage part (43) can store the solid-liquid mixture.

7. The coal drying and dehydration device according to claim 5, characterized in that: The cross-sectional size of the discharge cavity gradually decreases in a direction away from the dehydration cavity.

8. The coal drying and dehydration device according to claim 7, characterized in that: The coal drying and dehydration device further comprises a storage bin (50), wherein the storage bin (50) is arranged at the bottom of the discharge port, and the storage bin (50) is used to store the dehydrated coal.

9. The coal drying and dehydration device according to claim 1, characterized in that: The coal drying and dehydration device further comprises a steam generator (60), the steam generator (60) being in communication with the gas injection port, and the steam generator (60) being used to inject high-temperature steam into the dehydration chamber.

10. The coal drying and dehydration device according to claim 9, characterized in that: The dehydration tank is provided with a pressure detection component (70) and a temperature detection component (80), wherein the pressure detection component (70) is used to detect the pressure in the dehydration chamber, and the temperature detection component (80) is used to detect the temperature in the dehydration chamber. The coal drying and dehydration device further comprises a controller (90), wherein the controller (90) is electrically connected to the pressure detection component (70), the temperature detection component (80), the steam generator (60), and the heating component (21), respectively.

Images