Drying system for flammable and explosive materials

Abstract

The invention 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 component and a first steam heating component are sequentially arranged between an air inlet and an air outlet of the first-stage air inlet assembly, and a second steam heating component is arranged between an air inlet and an air outlet of the second-stage air inlet assembly. An inlet of the first steam heating component is connected with a first steam heating pipeline, an outlet of the first steam heating component 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, and 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] The invention relates to production equipment used in medicine and chemical industries, and in particular to a drying system for flammable and explosive materials. Background Art

[0002] Tiny granular materials (e.g. materials with a particle size of 250-300μm) are very densely packed and difficult to ventilate, which results in a very long drying time using conventional drying methods, affecting production efficiency, while significantly increasing energy consumption and further increasing production costs. In addition, dust particles of energetic solid materials (flammable and explosive) are prone to explosion when squeezed and rubbed in a dry state, further increasing the difficulty of drying such materials.

[0003] Prior application CN 117190659 A discloses a material dryer and a drying method thereof. After the material carrier enters the shell, it is transported to its position through a conveying track. The hopper and the material carrier are connected up and down. The air inlet component provides hot air. After the hot air enters the shell through the air inlet, it can pass through the material, screen and hopper in the material carrier from top to bottom in turn, thereby drying the material. The hopper can collect hot air from all directions to ensure that the drying effect of the material at all places is uniform and consistent. Finally, the hot air is exhausted to the outside through the exhaust component, which has a good drying effect, high drying efficiency, and reduced energy consumption. The hot air flows from top to bottom, which is conducive to preventing dust particles from floating and reducing the risk of explosion. The conveying track can accommodate multiple material carriers at the same time, thereby doubling the drying efficiency. However, the existing air inlet components mostly use electric heating, resulting in the high energy consumption of the air inlet component itself, and multiple hoppers share the exhaust component, so that each material carrier will affect each other, which is not conducive to independently controlling the drying effect of the material carrier. Summary of the invention

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

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

[0006] A drying system for flammable and explosive materials comprises a dryer, a primary air inlet assembly and a secondary air inlet assembly, the air outlet of the primary air inlet assembly is connected to the air inlet of the secondary air inlet assembly, the air outlet of the secondary air inlet assembly is connected to the air inlet of the dryer, the drying system for flammable and explosive materials also comprises a waste heat utilization tank, a hot water heating component and a first steam heating component are arranged in sequence between the air inlet and the air outlet of the primary air inlet assembly, a second steam heating component is arranged between the air inlet and the air outlet of the secondary air inlet assembly, the inlet of the first steam heating component is connected to a first steam heating pipeline and the outlet is connected to the inlet of the waste heat utilization tank, the inlet of the second steam heating component is connected to a second steam heating pipeline and the outlet is connected to the inlet of the waste heat utilization tank, and the outlet of the waste heat utilization tank is connected to the inlet of the hot water heating component.

[0007] As a further improvement of 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 port, 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 port, 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 of the above technical solution: the housing of the dryer is provided with a heating jacket, an 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 of 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 in the shell of the dryer, the height of the second spray assembly is smaller than the first spray assembly, the outlet of the online cleaning tank is connected to the inlets of the first spray assembly and the second spray assembly, and a drain outlet is provided at the bottom of the shell.

[0010] As a further improvement of the above technical solution: a conveying track is provided in the shell of the dryer, and a plurality of hoppers are provided on the conveying track along the conveying direction, and an outlet of each hopper is respectively connected to an exhaust assembly.

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

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

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The drying system for flammable and explosive materials disclosed in the present invention, when drying the materials, outdoor fresh air passes through the first-level air inlet component and the second-level air inlet component in sequence, and the hot water heating component and the first steam heating component successively heat the fresh air to make the fresh air temperature reach about 25°C, realizing fresh air preheating, and then the second steam heating component continues to heat the fresh air to the required temperature for drying, and then the high-temperature fresh air enters the dryer to dry the materials. The steam condensate generated after the heated steam exchanges heat with the fresh air in the first steam heating component and the second steam heating component is collected in the waste heat utilization tank, and then transported to the hot water heating component to heat the fresh air, realizing waste heat utilization, and at the same time making the drainage temperature of the steam condensate meet the environmental control requirements, and the structure is simple and reasonable, improving the energy utilization efficiency, thereby reducing energy consumption and reducing the operating cost of the drying system for flammable and explosive materials.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the air inlet assembly and the waste heat utilization tank in the present invention.

[0017] Figure 2 It is a structural schematic diagram of the dryer in the present invention.

[0018] Figure 3 It is a schematic structural diagram of the hot water tank and the online cleaning tank in the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the extraction assembly in the present invention.

[0020] The symbols in the figure represent:

[0021] 1. Dryer; 11. Heating jacket; 12. First spray assembly; 13. Second spray assembly; 14. Conveying track; 15. Hopper; 16. Drain; 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 utilization 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 removal tank; 711. Air inlet; 712. Exhaust; 72. Vacuuming component; 73. Filter packing layer. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0026] Figures 1 to 4An embodiment of a drying system for inflammable and explosive materials of the present invention is shown. The drying system for inflammable and explosive materials of this embodiment includes a dryer 1, a first-level air inlet component 21 and a second-level air inlet component 22. The air outlet of the first-level air inlet component 21 is connected to the air inlet of the second-level air inlet component 22, and the air outlet of the second-level air inlet component 22 is connected to the air inlet of the dryer 1. The drying system for inflammable 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-level air inlet component 21, and a second steam heating component 221 is arranged between the air inlet and the air outlet of the second-level air inlet component 22. The inlet of the first steam heating component 212 is connected to the first steam heating pipeline 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 the second steam heating pipeline 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. Preferably, a fan 222 may be disposed between the air inlet and the air outlet of the secondary air inlet assembly 22 to drive the flow of fresh air. Of course, in other embodiments, the fan 222 may also be disposed between the air inlet and the air outlet of the primary air inlet assembly 21, or both the primary air inlet assembly 21 and the secondary air inlet assembly 22 may be equipped with a fan 222.

[0027] See Figure 1 In the drying system for inflammable and explosive materials of this embodiment, when the dryer 1 needs to dry the material, the outdoor fresh air passes through the first-level air inlet component 21 and the second-level air inlet component 22 in sequence, and the hot water heating component 211 and the first steam heating component 212 successively heat the fresh air to make the fresh air temperature reach about 25°C, realizing the fresh air preheating, and then the second steam heating component 221 continues to heat the fresh air to the required drying temperature, and then the high-temperature fresh air enters the dryer 1 to dry the material. The steam condensed water generated by the heating steam transported by the first steam heating pipeline 41 and the second steam heating pipeline 42 after heat exchange with the fresh air in the first steam heating component 212 and the second steam heating component 221 is collected in the waste heat utilization tank 3, and then transported to the hot water heating component 211 to heat the fresh air, realizing the waste heat utilization, and at the same time, the drainage temperature of the steam condensed water meets the environmental control requirements, and the structure is simple and reasonable, which improves the energy utilization efficiency, thereby reducing energy consumption and reducing the operating cost of the drying system for inflammable and explosive materials.

[0028] See Figure 3In this embodiment, the drying system for inflammable and explosive materials further 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 port. 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 port. The high-temperature inlet of the heat exchanger 52 is connected to the third steam heating pipeline 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 pipeline 43 in the heat exchanger 52. After the hot water is heated, it flows into the hot water tank 51 again through the circulating water return port, so as to realize the circulating heating of the hot water, and the heating effect is good; the steam condensate generated after the high-temperature steam and the hot water are heat-exchanged is also transported to the waste heat utilization tank 3, and then transported to the hot water heating component 211 to heat the fresh air, so as to realize the waste heat utilization, and 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 inflammable 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 Figure 2 and Figure 3 In this embodiment, the housing of the dryer 1 is provided with a heating jacket 11, an 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 to the heating jacket 11 to heat the dryer 1, and then flows back to the hot water tank 51 from the outlet of the heating jacket 11, so that the inside of the dryer 1 quickly reaches the drying temperature, further improving the heating efficiency of the dryer 1; and the housing of the dryer 1 has good thermal insulation performance, which is beneficial to reducing the heat loss of the housing. Preferably, the inlet of the heating jacket 11 is arranged at the bottom, and the outlet of the heating jacket 11 is arranged at the top, and the hot water flows from bottom to top, which is beneficial to improving the heating effect of the dryer 1.

[0030] See Figure 3 In this embodiment, an outlet of the hot water tank 51 is connected to an online cleaning tank 6 (CIP tank), a first spray assembly 12 and a second spray assembly 13 are provided in the housing of the dryer 1, the height of the second spray assembly 13 is smaller than 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, and a drain port 16 is provided at the bottom of the housing. When it is necessary to clean the inside of the dryer 1, the hot water tank 51 outputs hot water to the online cleaning tank 6, and the online cleaning tank 6 conveys the hot water to the first spray assembly 12 and the second spray assembly 13. The first spray assembly 12 mainly performs high-pressure spray cleaning on the upper space of the housing, and the second spray assembly 13 mainly performs high-pressure spray cleaning on the lower space of the housing, especially the hopper 15, which is conducive to improving the online cleaning effect, basically eliminating the dust in the housing, and improving safety.

[0031] See Figure 2 In this embodiment, a conveying track 14 is provided in the housing of the dryer 1. The conveying track 14 is provided with a plurality of hoppers 15 along the conveying direction. The outlets of the hoppers 15 are respectively connected to the exhaust assembly 7. Each material carrier moves along the conveying track 14 and reaches above a hopper 15. After the high-temperature fresh air enters the dryer 1 to dry the material in the material carrier, it is discharged through the hopper 15 and the exhaust assembly 7 in sequence. Since each group of exhaust assemblies 7 works independently and does not affect each other, it is conducive to ensuring that the drying effect of the materials in each material carrier is uniform.

[0032] See Figure 4 In this embodiment, the exhaust assembly 7 includes a water bath dust removal tank 71 and a vacuum pumping component 72. The water bath dust removal tank 71 is provided with 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 pumping component 72. The hot air discharged from the dryer 1 enters the water bath dust removal tank 71 through the air inlet 711, and performs water bath dust removal to prevent the dust carried in the hot air from being discharged to the outside and to avoid explosion. The hot air after water bath dust removal is discharged to the outside through the exhaust port 712 and the vacuum pumping component 72 in sequence.

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

[0034] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution 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-level air inlet component (21); a second steam heating component (221) is arranged between the air inlet and the air outlet of the second-level air inlet component (22); the inlet of the first steam heating component (212) is connected to a first steam heating pipeline (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 pipeline (42) and the outlet is connected to the inlet of the waste heat utilization tank (3); and 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), wherein the hot water tank (51) is provided with a circulating water outlet and a circulating water return port, wherein 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 port, 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 housing of the dryer (1) is provided with a heating jacket (11), an 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: An outlet of the hot water tank (51) is connected to an online cleaning tank (6); a first spray assembly (12) and a second spray assembly (13) are provided in a shell of the dryer (1); the height of the second spray assembly (13) is smaller 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); and a drain outlet (16) is provided at the bottom of the shell.

5. The drying system for flammable and explosive materials according to any one of claims 1 to 4, characterized in that: A conveying track (14) is provided in the housing of the dryer (1), and a plurality of hoppers (15) are provided on the conveying track (14) along the conveying direction, and the outlet of each hopper (15) is respectively connected to an exhaust assembly (7).

6. The drying system for flammable and explosive materials according to claim 5, characterized in that: The exhaust assembly (7) comprises a water bath dust removal tank (71) and a vacuum pumping component (72); the water bath dust removal tank (71) is provided with 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 pumping component (72).

7. The drying system for flammable and explosive materials according to claim 6, characterized in that: A filter packing layer (73) is provided in the water bath dust removal tank (71), and the filter packing layer (73) is located between the air inlet (711) and the air outlet (712).

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