Drying system for flammable and explosive materials

Abstract

The utility model discloses a drying system for flammable and explosive materials, which comprises a drying machine, a primary air inlet assembly and a secondary air inlet assembly, an air outlet of the primary air inlet assembly is connected with an air inlet of the secondary air inlet assembly, an air outlet of the secondary air inlet assembly is connected with an air inlet of the drying machine, and the system further comprises a waste heat utilization tank. A hot water heating part and a first steam heating part are sequentially arranged between an air inlet and an air outlet of the first-stage air inlet assembly, a second steam heating part is arranged between an air inlet and an air outlet of the second-stage air inlet assembly, an inlet of the first steam heating part is connected with a first steam heating pipeline, and an outlet of the first steam heating part is connected with an inlet of the waste heat utilization tank. An inlet of the second steam heating component is connected with a second steam heating pipeline, an outlet of the second steam heating component is connected with an inlet of the waste heat utilization tank, and an outlet of the waste heat utilization tank is connected with an inlet of the hot water heating component. The device has the advantages of being reasonable in structure, beneficial to reducing energy consumption, meeting environment control requirements and the like.

Description

Technical Field

[0001] This utility model relates to production equipment used in the pharmaceutical and chemical industries, and more particularly to a drying system for flammable and explosive materials. Background Technology

[0002] Fine granular materials (e.g., those with a particle size of 250-300 μm) are densely packed and poorly permeable, resulting in exceptionally long drying times using conventional methods. This impacts production efficiency, significantly increases energy consumption, and further raises production costs for enterprises. Furthermore, dust particles containing energetic solids (flammable and explosive) are prone to explosion when subjected to compression and friction during drying, further complicating the drying process.

[0003] The earlier application CN 117190659 A disclosed a material dryer and its drying method. After the material carrier enters the shell, it is conveyed into position via a conveyor track. The hopper is vertically connected to the material carrier. An air inlet assembly provides hot air, which enters the shell through the air inlet and flows from top to bottom through the material in the material carrier, the screen, and the hopper, thus drying the material. The hopper can collect hot air from all directions, ensuring uniform and consistent drying. Finally, the hot air is exhausted to the outside by an exhaust assembly. This method offers good drying effect, high drying efficiency, and reduced energy consumption. Furthermore, the downward flow of hot air helps prevent dust particles from floating, reducing the risk of explosion. The conveyor track can accommodate multiple material carriers simultaneously, thus significantly increasing drying efficiency. However, existing air inlet assemblies mostly use electric heating, resulting in relatively high energy consumption. Additionally, multiple hoppers share the exhaust assembly, causing interference between the material carriers and hindering independent control of the drying effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a drying system for flammable and explosive materials that has a reasonable structure, is conducive to reducing energy consumption, and meets environmental control requirements.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A drying system for flammable and explosive materials includes a dryer, a primary air inlet assembly, and a secondary air inlet assembly. The outlet of the primary air inlet assembly is connected to the inlet of the secondary air inlet assembly, and the outlet of the secondary air inlet assembly is connected to the inlet of the dryer. The drying system for flammable and explosive materials also includes a waste heat recovery tank. A hot water heating component and a first steam heating component are sequentially arranged between the inlet and outlet of the primary air inlet assembly. A second steam heating component is arranged between the inlet and outlet of the secondary air inlet assembly. The inlet of the first steam heating component is connected to a first steam heating pipe, and its outlet is connected to the inlet of the waste heat recovery tank. The inlet of the second steam heating component is connected to a second steam heating pipe, and its outlet is connected to the inlet of the waste heat recovery tank. The outlet of the waste heat recovery tank is connected to the inlet of the hot water heating component.

[0007] As a further improvement to the above technical solution: the drying system for flammable and explosive materials also includes a hot water tank and a heat exchanger. The hot water tank is provided with a circulating water outlet and a circulating water return outlet. The circulating water outlet is connected to the low-temperature inlet of the heat exchanger, the low-temperature outlet of the heat exchanger is connected to the circulating water return outlet, the high-temperature inlet of the heat exchanger is connected to a third steam heating pipeline, and the high-temperature outlet is connected to the inlet of the waste heat utilization tank.

[0008] As a further improvement to the above technical solution: the shell of the dryer is provided with a heating jacket, one outlet of the hot water tank is connected to the inlet of the heating jacket, and the outlet of the heating jacket is connected to the inlet of the hot water tank.

[0009] As a further improvement to the above technical solution: an outlet of the hot water tank is connected to an online cleaning tank, a first spray assembly and a second spray assembly are provided inside the shell of the dryer, the height of the second spray assembly is less than that of the first spray assembly, the outlet of the online cleaning tank is connected to the inlet of the first spray assembly and the inlet of the second spray assembly, and a drain outlet is provided at the bottom of the shell.

[0010] As a further improvement to the above technical solution: the dryer has a conveying track inside its shell, and the conveying track has multiple hoppers along the conveying direction, with each hopper's outlet connected to a suction and discharge assembly.

[0011] As a further improvement to the above technical solution: the extraction and discharge assembly includes a water bath dust removal tank and a vacuum pumping component. The water bath dust removal tank has an air inlet at the bottom and an exhaust outlet at the top. The outlet of the hopper is connected to the air inlet, and the exhaust outlet is connected to the inlet of the vacuum pumping component.

[0012] As a further improvement to the above technical solution: the water bath dust removal tank is provided with a filter packing layer, which is located between the air inlet and the exhaust port.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model discloses a drying system for flammable and explosive materials. During material drying, outdoor fresh air sequentially passes through a primary air intake assembly and a secondary air intake assembly. A hot water heating component and a first steam heating component successively heat the fresh air, raising its temperature to approximately 25°C for preheating. Then, a second steam heating component further heats the fresh air to the required drying temperature. The high-temperature fresh air then enters the dryer to dry the material. The condensate generated after the heating steam exchanges heat with the fresh air in the first and second steam heating components is collected in a waste heat recovery tank and then transported to the hot water heating component to heat the fresh air, thus utilizing waste heat. Simultaneously, the drainage temperature of the condensate meets environmental control requirements. The system is simple and rationally designed, improving energy utilization efficiency, thereby reducing energy consumption and lowering the operating costs of drying systems for flammable and explosive materials.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the air intake component and waste heat utilization tank in this utility model.

[0017] Figure 2 This is a schematic diagram of the dryer in this utility model.

[0018] Figure 3 This is a structural schematic diagram of the hot water tank and the online cleaning tank in this utility model.

[0019] Figure 4 This is a schematic diagram of the extraction component in this utility model.

[0020] The labels in the diagram represent:

[0021] 1. Dryer; 11. Heating jacket; 12. First spray assembly; 13. Second spray assembly; 14. Conveying track; 15. Hopper; 16. Drain outlet; 21. Primary air inlet assembly; 211. Hot water heating component; 212. First steam heating component; 22. Secondary air inlet assembly; 221. Second steam heating component; 222. Fan; 3. Waste heat recovery tank; 41. First steam heating pipeline; 42. Second steam heating pipeline; 43. Third steam heating pipeline; 51. Hot water tank; 52. Heat exchanger; 6. Online cleaning tank; 7. Exhaust assembly; 71. Water bath dust collector; 711. Air inlet; 712. Exhaust outlet; 72. Vacuuming component; 73. Filter packing layer. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figures 1 to 4This invention illustrates an embodiment of a drying system for flammable and explosive materials. The system includes a dryer 1, a primary air inlet assembly 21, and a secondary air inlet assembly 22. The outlet of the primary air inlet assembly 21 is connected to the inlet of the secondary air inlet assembly 22, and the outlet of the secondary air inlet assembly 22 is connected to the inlet of the dryer 1. The system also includes a waste heat recovery tank 3. A hot water heating component 211 and a first steam heating component 212 are sequentially arranged between the inlet and outlet of the primary air inlet assembly 21. A second steam heating component 221 is arranged between the inlet and outlet of the secondary air inlet assembly 22. The inlet of the first steam heating component 212 is connected to a first steam heating pipe 41, and its outlet is connected to the inlet of the waste heat recovery tank 3. The inlet of the second steam heating component 221 is connected to a second steam heating pipe 42, and its outlet is connected to the inlet of the waste heat recovery tank 3. The outlet of the waste heat recovery tank 3 is connected to the inlet of the hot water heating component 211. Preferably, a fan 222 can be installed between the air inlet and the air outlet of the secondary air intake component 22 to drive the flow of fresh air. Of course, in other embodiments, the fan 222 can also be installed between the air inlet and the air outlet of the primary air intake component 21, or both the primary air intake component 21 and the secondary air intake component 22 can be equipped with a fan 222.

[0027] See details Figure 1 In this embodiment, the drying system for flammable and explosive materials involves the following steps: When the dryer 1 needs to dry the material, outdoor fresh air sequentially passes through the primary air intake assembly 21 and the secondary air intake assembly 22. The hot water heating component 211 and the first steam heating component 212 then heat the fresh air to approximately 25°C, achieving preheating. The second steam heating component 221 then further heats the fresh air to the required drying temperature before it enters the dryer 1 to dry the material. The heating steam transported by the first steam heating pipe 41 and the second steam heating pipe 42, after exchanging heat with the fresh air in the first steam heating component 212 and the second steam heating component 221, generates condensate which is collected in the waste heat utilization tank 3. This condensate is then transported to the hot water heating component 211 to heat the fresh air, achieving waste heat utilization. Simultaneously, the condensate drainage temperature meets environmental control requirements. The system is simple and reasonable in structure, improving energy utilization efficiency, thereby reducing energy consumption and lowering the operating cost of the drying system for flammable and explosive materials.

[0028] See details Figure 3In this embodiment, the drying system for flammable and explosive materials also includes a hot water tank 51 and a heat exchanger 52. The hot water tank 51 is provided with a circulating water outlet and a circulating water return outlet. The circulating water outlet is connected to the low-temperature inlet of the heat exchanger 52, and the low-temperature outlet of the heat exchanger 52 is connected to the circulating water return outlet. The high-temperature inlet of the heat exchanger 52 is connected to a third steam heating pipe 43, and the high-temperature outlet is connected to the inlet of the waste heat utilization tank 3. The hot water in the hot water tank 51 flows out through the circulating water outlet and then exchanges heat with the high-temperature steam input from the third steam heating pipe 43 in the heat exchanger 52. After being heated, the hot water flows back into the hot water tank 51 through the circulating water return outlet, realizing the circulating heating of the hot water with good heating effect. The steam condensate generated after the high-temperature steam exchanges heat with the hot water is also transported to the waste heat utilization tank 3, and then to the hot water heating component 211 to heat the fresh air, realizing the utilization of waste heat. At the same time, the drainage temperature of the steam condensate meets the environmental control requirements, further improving the energy utilization efficiency, thereby reducing energy consumption and reducing the operating cost of the drying system for flammable and explosive materials. Preferably, the heat exchanger 52 is a plate heat exchanger, which is beneficial to improving the heat exchange efficiency between hot water and high-temperature steam.

[0029] See details Figure 2 and Figure 3 In this embodiment, the dryer 1 has a heating jacket 11 in its shell. One outlet of the hot water tank 51 is connected to the inlet of the heating jacket 11, and the outlet of the heating jacket 11 is connected to the inlet of the hot water tank 51. The hot water tank 51 outputs hot water into the heating jacket 11 to heat the dryer 1, and then flows back from the outlet of the heating jacket 11 into the hot water tank 51, allowing the dryer 1 to quickly reach the drying temperature, further improving the heating efficiency of the dryer 1. Furthermore, the dryer 1 has good heat insulation properties, which helps reduce heat loss from the shell. Preferably, the inlet of the heating jacket 11 is located at the bottom, and the outlet of the heating jacket 11 is located at the top, with the hot water flowing from bottom to top, which helps improve the heating effect on the dryer 1.

[0030] See details Figure 3 In this embodiment, one outlet of the hot water tank 51 is connected to an online cleaning tank 6 (CIP tank). The dryer 1 housing is equipped with a first spray assembly 12 and a second spray assembly 13. The height of the second spray assembly 13 is less than that of the first spray assembly 12. The outlet of the online cleaning tank 6 is connected to the inlets of the first spray assembly 12 and the second spray assembly 13. A drain outlet 16 is provided at the bottom of the housing. When cleaning of the dryer 1 is required, the hot water tank 51 outputs hot water to the online cleaning tank 6, which then delivers the hot water to the first spray assembly 12 and the second spray assembly 13. The first spray assembly 12 primarily performs high-pressure spray cleaning on the upper space of the housing, while the second spray assembly 13 primarily performs high-pressure spray cleaning on the lower space of the housing. The hopper 15, in particular, helps improve the online cleaning effect, essentially eliminating dust inside the housing and enhancing safety.

[0031] See details Figure 2 In this embodiment, the dryer 1 has a conveying track 14 inside its casing. Multiple hoppers 15 are arranged along the conveying direction on the conveying track 14, and each hopper 15 has an outlet connected to a suction assembly 7. Each material carrier moves along the conveying track 14 and reaches above a hopper 15. High-temperature fresh air enters the dryer 1 to dry the material in the material carrier, and then passes through the hopper 15 and suction assembly 7 sequentially before being discharged. Since each suction assembly 7 operates independently and does not interfere with each other, it helps ensure a uniform drying effect for the material in each material carrier.

[0032] See details Figure 4 In this embodiment, the extraction assembly 7 includes a water bath dust collector 71 and a vacuum component 72. The water bath dust collector 71 has an air inlet 711 at its lower part and an exhaust outlet 712 at its upper part. The outlet of the hopper 15 is connected to the air inlet 711, and the exhaust outlet 712 is connected to the inlet of the vacuum component 72. The hot air discharged from the dryer 1 enters the water bath dust collector 71 through the air inlet 711 for water bath dust removal, preventing the dust carried in the hot air from being discharged outdoors and avoiding explosion. After water bath dust removal, the hot air is discharged outdoors through the exhaust outlet 712 and the vacuum component 72 in sequence.

[0033] Furthermore, in this embodiment, the water bath dust collector 71 is provided with a filter media layer 73, which is located between the air inlet 711 and the exhaust port 712. The hot air entering the water bath dust collector 71 is first subjected to water bath dust removal, and then filtered through the filter media layer 73 to prevent the dust carried in the hot air from being discharged outdoors, thus ensuring safety.

[0034] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A drying system for flammable and explosive materials, comprising a dryer (1), a primary air inlet assembly (21), and a secondary air inlet assembly (22), wherein the air outlet of the primary air inlet assembly (21) is connected to the air inlet of the secondary air inlet assembly (22), and the air outlet of the secondary air inlet assembly (22) is connected to the air inlet of the dryer (1), characterized in that: The drying system for flammable and explosive materials also includes a waste heat utilization tank (3). A hot water heating component (211) and a first steam heating component (212) are sequentially arranged between the air inlet and the air outlet of the first-stage air inlet assembly (21). A second steam heating component (221) is arranged between the air inlet and the air outlet of the second-stage air inlet assembly (22). The inlet of the first steam heating component (212) is connected to a first steam heating pipe (41), and the outlet is connected to the inlet of the waste heat utilization tank (3). The inlet of the second steam heating component (221) is connected to a second steam heating pipe (42), and the outlet is connected to the inlet of the waste heat utilization tank (3). The outlet of the waste heat utilization tank (3) is connected to the inlet of the hot water heating component (211).

2. The drying system for flammable and explosive materials according to claim 1, characterized in that: It also includes a hot water tank (51) and a heat exchanger (52). The hot water tank (51) is provided with a circulating water outlet and a circulating water return outlet. The circulating water outlet is connected to the low temperature inlet of the heat exchanger (52). The low temperature outlet of the heat exchanger (52) is connected to the circulating water return outlet. The high temperature inlet of the heat exchanger (52) is connected to a third steam heating pipeline (43), and the high temperature outlet is connected to the inlet of the waste heat utilization tank (3).

3. The drying system for flammable and explosive materials according to claim 2, characterized in that: The dryer (1) has a heating jacket (11) on its shell. One outlet of the hot water tank (51) is connected to the inlet of the heating jacket (11), and the outlet of the heating jacket (11) is connected to the inlet of the hot water tank (51).

4. The drying system for flammable and explosive materials according to claim 2, characterized in that: One outlet of the hot water tank (51) is connected to an online cleaning tank (6). The dryer (1) has a first spray assembly (12) and a second spray assembly (13) inside its housing. The height of the second spray assembly (13) is less than that of the first spray assembly (12). The outlet of the online cleaning tank (6) is connected to the inlet of the first spray assembly (12) and the second spray assembly (13). The bottom of the housing is provided with a drain outlet (16).

5. The drying system for flammable and explosive materials according to any one of claims 1 to 4, characterized in that: The dryer (1) has a conveying track (14) inside its shell. The conveying track (14) has multiple hoppers (15) along the conveying direction. The outlet of each hopper (15) is connected to a suction assembly (7).

6. The drying system for flammable and explosive materials according to claim 5, characterized in that: The extraction assembly (7) includes a water bath dust collector (71) and a vacuum component (72). The water bath dust collector (71) has an air inlet (711) at the bottom and an exhaust port (712) at the top. The outlet of the hopper (15) is connected to the air inlet (711), and the exhaust port (712) is connected to the inlet of the vacuum component (72).

7. The drying system for flammable and explosive materials according to claim 6, characterized in that: The water bath dust collector (71) is provided with a filter packing layer (73), which is located between the air inlet (711) and the exhaust port (712).

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