Phenylenediamine rectification purification tower

Abstract

The invention relates to the technical field of chemical manufacturing, in particular to a phenylenediamine rectification purification tower. According to the technical scheme, the device comprises a rectifying section and a stripping section fixed to the lower portion of the rectifying section, a rectifying plate structure is arranged on the inner wall of the rectifying section, and a filter opening mechanism is arranged at the top end of the rectifying plate structure and comprises a plurality of fixed bases fixed to the top end of the rectifying plate structure; the top ends of the multiple fixed bases are fixedly connected with steam guide blocks, the outer walls of the multiple steam guide blocks are slidably connected with airflow guide structures, the top ends of the multiple steam guide blocks are provided with air guide ports in a penetrating manner, the stripping section comprises a stripping tank, and the inner wall of the stripping tank is provided with a filtrate mechanism and a filter guide mechanism. According to the phenylenediamine rectification purification tower, the purification rate of phenylenediamine is increased, repeated purification and rectification are not needed any more, time is saved, and the phenylenediamine rectification purification tower has the functions of being better in phenylenediamine purification effect and higher in efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of chemical product manufacturing, in particular to a phenylenediamine distillation and purification tower. Background Art

[0002] Phenylenediamine is an organic compound with three isomers: o-phenylenediamine, m-phenylenediamine and p-phenylenediamine. Phenylenediamine is a colorless monoclinic crystal at room temperature. It is slightly soluble in cold water, but easily soluble in ethanol, ether and chloroform. It is an important organic synthetic raw material, widely used in the manufacture of dyes, pesticides, additives and photosensitive materials, and can also be used to prepare compounds such as polyamide, polyurethane, carbendazim and thiophanate. In the preparation of phenylenediamine, because its raw materials contain more mixed chemical substances, phenylenediamine needs to be distilled and purified before the next step of operation can be carried out. However, the existing phenylenediamine distillation and purification adopts the gas-liquid conversion of the raw materials of phenylenediamine, distills and purifies the substances with lower boiling points, and collects the condensate. However, the purification rate of phenylenediamine is slow, and the steam condensed thereon is not well guided, so that when the steam is used to gasify phenylenediamine, it is often mixed with most of the microparticles of other chemical substances. The excess liquid produced by condensation requires multiple purification and distillation to obtain qualified phenylenediamine raw materials, which wastes energy and purification efficiency. Therefore, the present application proposes a phenylenediamine distillation and purification tower. Summary of the invention

[0003] The purpose of the present invention is to propose a phenylenediamine distillation and purification tower to address the problem that in the background technology, when phenylenediamine is gasified, it is often mixed with microparticles of water droplets of most other chemical substances, so that the excess liquid produced by condensation requires multiple purification and distillation to obtain qualified phenylenediamine raw materials, which wastes energy and purification efficiency.

[0004] The technical solution of the present invention is: a phenylenediamine distillation and purification tower, comprising a distillation section and a stripping section fixed below the distillation section, wherein the inner wall of the distillation section is provided with a distillation plate structure, and the top of the distillation plate structure is provided with a filter mechanism;

[0005] The filter mechanism includes a plurality of fixed bases fixed to the top of the distillation plate structure, the tops of the plurality of fixed bases are fixedly connected with steam guide blocks, the outer walls of the plurality of steam guide blocks are slidably connected with airflow guide structures, and the tops of the plurality of steam guide blocks are penetrated with air guide ports.

[0006] The stripping section comprises a stripping tank, the inner wall of which is provided with a filtrate mechanism and a filter guide mechanism, wherein the filtrate mechanism is located at the top of the filter guide mechanism.

[0007] The filtrate mechanism includes a second connecting frame, the inner wall of the second connecting frame is fixedly connected with a plurality of support plates, the outer walls of the plurality of support plates are fixedly connected with a plurality of guide plates at equal intervals on both sides, and the upper and lower ends of the plurality of support plates are fixedly connected with filter ports.

[0008] Optionally, a spraying mechanism is provided on one side of the distillation section, and the spraying mechanism includes a material conduit 1, a plurality of transmission pipes are fixedly connected to the outer wall of the material conduit 1, an annular conduit is fixedly connected to one end of the plurality of transmission pipes away from the material conduit 1, a plurality of material conduits 2 are fixedly connected to the outer wall of the annular conduit, and a nozzle is fixedly connected to one end of the material conduit 2 away from the annular conduit.

[0009] Optionally, a guide port is fixedly connected to the bottom end of the nozzle, and the outer wall of the nozzle is fixed to the annular conduit through a fixing frame.

[0010] Optionally, the distillation plate structure includes a fixed plate, a plurality of the fixed plates have a water weir fixedly connected to one side of the top of the fixed plates, a baffle fixedly connected to one side of the top of the water weir, a water inlet is opened on the other side of the top of the fixed plates, and a guide water weir is fixedly connected to the bottom end of the fixed plates at a position corresponding to the water inlet.

[0011] Optionally, the airflow guide mechanism includes a hood head, which is slidably connected to the outer wall of the steam guide block, and the inner top end of the hood head is fixedly connected to a connecting frame, both sides of the outer wall of the hood head are fixedly connected to airflow guide frames, the inner wall of the airflow guide frame is fixedly connected to a plurality of guide plates, and both sides of the outer wall of the hood head are fixedly connected to a plurality of jet ports, and the plurality of jet ports correspond to the guide plates.

[0012] Optionally, the inner wall of the distillation section is provided with an airflow optimization mechanism, and the airflow optimization mechanism includes a connecting plate fixed to the bottom end of the inner wall of the distillation section, and a plurality of steam guide plates are fixedly connected to the top end of the connecting plate.

[0013] Optionally, a plurality of guide boxes are fixedly connected to the inner wall of the second connecting frame, a plurality of guide boxes are fixedly connected to a connecting column at a center position, and a plurality of guide plates are passed through the outer walls of the plurality of guide boxes.

[0014] Optionally, the filter guide mechanism comprises a liquid storage box fixed to the inner wall of the distillation tank, and a plurality of filter blocks at different positions are fixedly connected to the top of the liquid storage box.

[0015] Optionally, a gas outlet is fixedly connected to the top of the distillation section, and a material inlet pipe is fixedly connected to one side of the outer wall of the distillation section, the bottom end of the inner wall of the distillation section is located below the distillation plate structure, and a steam inlet is penetrated at the position corresponding to the airflow optimization mechanism, and a reheat steam inlet is penetrated on one side of the outer wall of the stripping section.

[0016] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0017] The present invention transmits water layer by layer through a water inlet and a guide water weir, thereby increasing the contact area between the material and the steam. When the steam is transmitted upward, the steam is guided to the airflow guide frames on both sides through a connecting frame fixed at the top of the hood head, and other chemical droplets in the steam are blocked and filtered through a guide plate fixedly connected to the airflow guide frame. The vaporized steam is transmitted out through the bottom of the hood head and transmitted to the condensation section through the gas outlet for condensation and purification, thereby improving the purification rate of phenylenediamine, eliminating the need for repeated purification and distillation, and saving time.

[0018] The material is further transferred to the filter block below through the guide box to filter out larger particles of fixed impurities, and the vaporized steam is filtered through the filter ports fixedly connected at the upper and lower ends of the support plate to filter the droplets therein, so that the vaporized phenylenediamine can be purified, and then the secondary filtration is carried out through the filter port mechanism above, so that the purification effect of phenylenediamine is better and the efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional structural diagram of a phenylenediamine distillation and purification tower is provided;

[0020] Figure 2 A schematic diagram of the internal structure of a phenylenediamine distillation and purification tower is provided;

[0021] Figure 3 It is a schematic diagram of the spraying mechanism structure;

[0022] Figure 4 It is a schematic diagram of the structure of the distillation plate mechanism;

[0023] Figure 5 Schematic diagram of the filter mechanism structure;

[0024] Figure 6 Schematic diagram of the internal structure of the stripping section;

[0025] Figure 7 It is a schematic diagram of the structure of the filtrate mechanism and the filter guide mechanism;

[0026] Figure 8 Schematic diagram of the internal structure of the filtrate mechanism.

[0027] Reference numerals: 1, distillation section; 11, injection mechanism; 12, distillation plate structure; 13, filter port mechanism; 14, airflow optimization mechanism;

[0028] 1101, material conduit 1; 1102, transmission pipe; 1103, annular conduit; 1104, material conduit 2; 1105, nozzle; 1106, guide port; 1107, fixing frame;

[0029] 1201, fixed plate; 1202, water weir; 1203, baffle; 1204, water inlet; 1205, water guide weir;

[0030] 1301, hood head; 1302, fixed base; 1303, steam guide block; 1304, air guide port; 1305, connecting frame 1; 1306, air flow guide frame; 1307, guide plate; 1308, air jet port;

[0031] 1401, connecting plate; 1402, steam guide plate;

[0032] 2. stripping section; 21. stripping tank; 22. filtrate mechanism; 23. filter guide mechanism;

[0033] 2201, connecting frame 2; 2202, guide box; 2203, connecting column; 2204, support plate; 2205, guide plate; 2206, filter port;

[0034] 2301, liquid storage tank; 2302, filter block;

[0035] 3. Gas outlet; 4. Material inlet; 5. Reheat steam inlet; 6. Steam inlet. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0038] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figure 1 , Figure 2 and Figure 4 As shown, a distillation and purification tower for phenylenediamine proposed in the present invention comprises a distillation section 1 and a distillation section 2 fixed below the distillation section 1, the inner wall of the distillation section 1 is provided with a distillation plate structure 12, the top of the distillation plate structure 12 is provided with a filter mechanism 13, the filter mechanism 13 comprises a plurality of fixed bases 1302 fixed to the top of the distillation plate structure 12, the tops of the plurality of fixed bases 1302 are fixedly connected with steam guide blocks 1303, the outer walls of the plurality of steam guide blocks 1303 are all slidably connected with an airflow guide structure, and the tops of the plurality of steam guide blocks 1303 are all penetrated with air guide ports 1304.

[0045] As described above, the vaporized steam passes through the steam guide block 1303 and the air guide port 1304 on the fixed base 1302, and guides the gasified phenylenediamine to the air flow guide mechanism, so as to facilitate the subsequent filtering of the droplets inside the vaporized phenylenediamine.

[0046] like Figure 6 , Figure 7 and Figure 8The distillation section 2 shown includes a distillation tank 21, and the inner wall of the distillation tank 21 is provided with a filtrate mechanism 22 and a filter guide mechanism 23. The filtrate mechanism 22 is located at the top of the filter guide mechanism 23. The filtrate mechanism 22 includes a second connecting frame 2201, and the inner wall of the second connecting frame 2201 is fixedly connected with a plurality of support plates 2204, and a plurality of guide plates 2205 are fixedly connected at equal intervals on both sides of the outer walls of the plurality of support plates 2204, and the upper and lower ends of the plurality of support plates 2204 are fixedly connected with filter ports 2206.

[0047] Through the above arrangement, the ungasified materials flow downward, and are transferred to the guide box 2202 through the multiple support plates 2204 and guide plates 2205 connected by the connecting frame 2201. The materials are then transferred to the filter block 2302 below through the guide box 2202 to filter out larger particles of fixed impurities.

[0048] Example 2

[0049] like Figure 1-Figure 8 As shown, based on Example 1, a spraying mechanism 11 is provided on one side of the distillation section 1, and the spraying mechanism 11 includes a material conduit 1101, a plurality of transmission pipes 1102 are fixedly connected to the outer wall of the material conduit 1101, an annular conduit 1103 is fixedly connected to one end of the plurality of transmission pipes 1102 away from the material conduit 1101, a plurality of material conduits 2 1104 are fixedly connected to the outer wall of the annular conduit 1103, and a nozzle 1105 is fixedly connected to one end of the material conduit 2 1104 away from the annular conduit 1103.

[0050] It should be emphasized that the material is transmitted to the transmission pipe 1102 through the material conduit 1101, and the material is transmitted to the annular conduit 1103 through the transmission pipe 1102, and the material is diverted through the annular conduit 1103 and transmitted to the material conduit 2 1104 and the nozzle 1105, and the material is transmitted to the inside of the distillation section 1 through the nozzle 1105.

[0051] The bottom end of the nozzle 1105 is fixedly connected with a guide port 1106 , and the outer wall of the nozzle 1105 is fixed to the annular conduit 1103 via a fixing frame 1107 .

[0052] Through the above arrangement, by providing the fixing frame 1107, the nozzle 1105 can be fixed to the annular conduit 1103 to prevent the sprayed material from falling due to excessive pressure.

[0053] The distillation plate structure 12 includes a fixed plate 1201, a water weir 1202 is fixedly connected to one side of the top of the multiple fixed plates 1201, a baffle 1203 is fixedly connected to one side of the top of the multiple water weirs 1202, a water inlet 1204 is opened on the other side of the top of the multiple fixed plates 1201, and a guide water weir 1205 is fixedly connected to the bottom end of the multiple fixed plates 1201 corresponding to the position of the water inlet 1204.

[0054] In summary, the material is transported into the distillation section 1 through the material inlet pipe 4, the material is transported to the fixed plate 1201 through the water weir 1202, and is transported downward layer by layer through the water inlet 1204 and the guide water weir 1205, thereby increasing the contact area between the material and the steam.

[0055] The airflow guide mechanism includes a hood head 1301, which is slidably connected to the outer wall of the steam guide block 1303, and the inner top of the hood head 1301 is fixedly connected to a connecting frame 1305, both sides of the outer wall of the hood head 1301 are fixedly connected to airflow guide frames 1306, the inner wall of the airflow guide frame 1306 is fixedly connected to a plurality of guide plates 1307, and both sides of the outer wall of the hood head 1301 are fixedly connected to a plurality of jet ports 1308, and the plurality of jet ports 1308 correspond to the guide plates 1307.

[0056] It should be noted that when the steam is transmitted upward, the material is heated to vaporize the diphenylenediamine. However, the vaporized steam is often mixed with many other chemical droplets due to the airflow. The vaporized diphenylenediamine is transmitted to the hood head 1301 through the steam guide block 1303 and the air guide port 1304 on the fixed base 1302. The steam is guided to the airflow guide frames 1306 on both sides through the connecting frame 1305 fixed at the top of the hood head 1301. The other chemical droplets in the steam are blocked and filtered through the guide plate 1307 fixedly connected to the airflow guide frame 1306. The vaporized steam is transmitted out through the bottom of the hood head 1301 and transmitted to the condensation section through the gas outlet 3 for condensation and purification, thereby improving the purification rate of diphenylenediamine. Repeated purification and distillation are no longer necessary, saving time.

[0057] The inner wall of the rectifying section 1 is provided with an airflow optimization mechanism 14 , which includes a connecting plate 1401 fixed to the bottom end of the inner wall of the rectifying section 1 , and a plurality of steam guide plates 1402 are fixedly connected to the top end of the connecting plate 1401 .

[0058] By providing the steam guide plate 1402 , when hot steam enters the device, it can be guided by the steam guide plate 1402 and transmitted upward.

[0059] The inner wall of the connecting frame 2201 is fixedly connected with a plurality of guide boxes 2202, the plurality of guide boxes 2202 are fixedly connected with a connecting column 2203 at the center position, and the outer walls of the plurality of guide boxes 2202 are penetrated by a plurality of guide plates 2205, the filter guide mechanism 23 includes a liquid storage box 2301 fixed on the inner wall of the distillation tank 21, and the top of the liquid storage box 2301 is fixedly connected with a plurality of filter blocks 2302 at different positions.

[0060] As mentioned above, the material is transferred to the filter block 2302 below through the guide box 2202 to filter out the larger particles of fixed impurities.

[0061] A gas outlet 3 is fixedly connected to the top of the distillation section 1, and a material inlet pipe 4 is fixedly connected to one side of the outer wall of the distillation section 1. The bottom end of the inner wall of the distillation section 1 is located below the distillation plate structure 12, and a steam inlet 6 is penetrated at the position corresponding to the airflow optimization mechanism 14. A reheat steam inlet 5 is penetrated on one side of the outer wall of the stripping section 2. Through the above arrangement, materials and steam can enter the device.

[0062] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A phenylenediamine distillation and purification tower, comprising a distillation section (1) and a stripping section (2) fixed below the distillation section (1), characterized in that: The inner wall of the rectifying section (1) is provided with a rectifying plate structure (12), and the top of the rectifying plate structure (12) is provided with a filter mechanism (13); The filter mechanism (13) comprises a plurality of fixed bases (1302) fixed to the top of the distillation plate structure (12); the tops of the plurality of fixed bases (1302) are fixedly connected with steam guide blocks (1303); the outer walls of the plurality of steam guide blocks (1303) are slidably connected with airflow guide structures; and the tops of the plurality of steam guide blocks (1303) are penetrated with air guide ports (1304). The stripping section (2) comprises a stripping tank (21), the inner wall of the stripping tank (21) is provided with a filtrate mechanism (22) and a filter guide mechanism (23), and the filtrate mechanism (22) is located at the top of the filter guide mechanism (23). The filtrate mechanism (22) comprises a second connecting frame (2201), the inner wall of the second connecting frame (2201) being fixedly connected to a plurality of support plates (2204), the outer walls of the plurality of support plates (2204) being fixedly connected to a plurality of guide plates (2205) at equal intervals on both sides, and the upper and lower ends of the plurality of support plates (2204) being fixedly connected to filter ports (2206).

2. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: A spray mechanism (11) is provided on one side of the distillation section (1), and the spray mechanism (11) comprises a material conduit 1 (1101), a plurality of transmission pipes (1102) are fixedly connected to the outer wall of the material conduit 1 (1101), a ring-shaped conduit (1103) is fixedly connected to one end of the plurality of transmission pipes (1102) away from the material conduit 1 (1101), a plurality of material conduits 2 (1104) are fixedly connected to the outer wall of the ring-shaped conduit (1103), and a nozzle (1105) is fixedly connected to one end of the material conduit 2 (1104) away from the ring-shaped conduit (1103).

3. A phenylenediamine distillation and purification tower according to claim 2, characterized in that: The bottom end of the nozzle (1105) is fixedly connected to a guide port (1106), and the outer wall of the nozzle (1105) is fixed to the annular conduit (1103) via a fixing frame (1107).

4. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: The distillation plate structure (12) comprises a fixed plate (1201), a water weir (1202) is fixedly connected to one side of the top of the plurality of fixed plates (1201), a baffle (1203) is fixedly connected to one side of the plurality of water weirs (1202), a water inlet (1204) is provided on the other side of the top of the plurality of fixed plates (1201), and a guide water weir (1205) is fixedly connected to the bottom end of the plurality of fixed plates (1201) at a position corresponding to the water inlet (1204).

5. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: The airflow guide mechanism comprises a hood head (1301), the hood head (1301) is slidably connected to the outer wall of the steam guide block (1303), and the inner top end of the hood head (1301) is fixedly connected to a connecting frame (1305), both sides of the outer wall of the hood head (1301) are fixedly connected to airflow guide frames (1306), the inner wall of the airflow guide frame (1306) is fixedly connected to a plurality of guide plates (1307), and both sides of the outer wall of the hood head (1301) are fixedly connected to a plurality of jet ports (1308), and the plurality of jet ports (1308) correspond to the guide plates (1307).

6. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: The inner wall of the distillation section (1) is provided with an airflow optimization mechanism (14), and the airflow optimization mechanism (14) comprises a connecting plate (1401) fixed to the bottom end of the inner wall of the distillation section (1), and a plurality of steam guide plates (1402) are fixedly connected to the top end of the connecting plate (1401).

7. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: The inner wall of the second connecting frame (2201) is fixedly connected with a plurality of guide boxes (2202), the plurality of guide boxes (2202) are fixedly connected with a connecting column (2203) at a central position, and the outer walls of the plurality of guide boxes (2202) are penetrated by a plurality of guide plates (2205).

8. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: The filter guide mechanism (23) comprises a liquid storage box (2301) fixed to the inner wall of the distillation tank (21), and a plurality of filter blocks (2302) at different positions are fixedly connected to the top of the liquid storage box (2301).

9. A phenylenediamine distillation and purification tower according to claim 1, characterized in that: The top of the distillation section (1) is fixedly connected to a gas outlet (3), and one side of the outer wall of the distillation section (1) is fixedly connected to a material inlet pipe (4), the bottom end of the inner wall of the distillation section (1) is located below the distillation plate structure (12), and a steam inlet (6) is penetrated at a position corresponding to the airflow optimization mechanism (14), and a reheat steam inlet (5) is penetrated on one side of the outer wall of the stripping section (2).

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