P-phenylenediamine distillation extraction device

Abstract

The utility model discloses a p-phenylenediamine distillation and extraction device, which belongs to the field of chemical production and comprises a distillation kettle and a condenser shell, a corrugated pipe communicated with the distillation kettle is arranged at the top of the distillation kettle through a connecting pipe, a condenser pipe is arranged in the condenser shell, and a condenser is arranged in the condenser shell. The condenser shell is provided with an adjusting assembly used for adjusting the contact area of steam and the condensation pipe, the corrugated pipe is communicated with the interior of the condenser shell through the adjusting assembly, the top of the condenser shell is provided with a positioning assembly, and the bottom of the condenser shell is provided with a discharging pipe communicated with the interior of the condenser shell. According to the p-phenylenediamine distillation and extraction device, the fractionation effect in the distillation process can be optimized by adjusting the condensation area, target components can be more effectively condensed in the condensation pipe through the proper condensation area, meanwhile, condensation of non-target components is reduced, and therefore the purity and yield of products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a p-phenylenediamine distillation and extraction device. Background Art

[0002] p-phenylenediamine is an organic compound and a widely used intermediate. It can be used to make azo dyes, high molecular polymers, fur dyes, rubber antioxidants and photo developers. In addition, p-phenylenediamine is also a commonly used sensitive reagent for testing iron and copper. In the industrial production process, p-phenylenediamine may be mixed with other substances. Through distillation extraction, impurities in p-phenylenediamine can be removed to improve the purity and quality of the product.

[0003] When p-phenylenediamine is subjected to a distillation extraction device to remove impurities, the impurity components are different, and different impurities have different boiling points. For impurities with lower boiling points, a small-area condenser is required during distillation to ensure that the impurities can be quickly condensed and separated. For impurities with higher boiling points, a large-area condenser is required to extend the residence time of the steam in the condenser. Since the condensation area of ​​the condenser in the condenser of the current p-phenylenediamine distillation extraction device is fixed, impurities with different boiling points cannot be quickly and effectively separated during distillation, which leads to the problem of low distillation extraction efficiency. Utility Model Content

[0004] The utility model aims to solve the problem that the existing distillation extraction device has a fixed condensation area, impurities with different boiling points cannot be separated quickly and effectively, and the distillation extraction efficiency is low, and a p-phenylenediamine distillation extraction device is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technology: a p-phenylenediamine distillation and extraction device, including a distillation kettle and a condenser shell, the top of the distillation kettle is provided with a bellows connected to it through a connecting pipe, the interior of the condenser shell is provided with a condenser, the condenser shell is provided with an adjustment component for adjusting the contact area between steam and the condenser, and the bellows is connected to the interior of the condenser shell through the adjustment component, the top of the condenser shell is provided with a positioning component, and the bottom of the condenser shell is provided with a discharge pipe connected to the interior.

[0006] As a further description of the above technical solution: the adjustment component includes a piston movably installed inside the condenser shell, a fixed tube connected to the bellows is arranged in the middle position of the piston, an air guide plate is arranged at the bottom of the piston through a connecting tube, and air guide holes are opened on the air guide plate, and an adjustment plate that penetrates the condenser shell is arranged on the upper side of the piston at positions on both sides of the fixed tube, and a handle is arranged on the top of the adjustment plate.

[0007] As a further description of the above technical solution: the positioning assembly includes a positioning sleeve fixed to the top of the condenser shell, and a positioning bolt is arranged on one side of the positioning sleeve through a bolt seat;

[0008] The adjusting plate passes through the positioning sleeve and is movably connected thereto, and a positioning screw hole matched with a positioning bolt is provided on the adjusting plate.

[0009] As a further description of the above technical solution: the number of the positioning screw holes is several and they are evenly arranged along the height direction of the adjustment plate.

[0010] As a further description of the above technical solution: the air guide hole is in a truncated cone shape, and the cross-section of the air guide hole toward the top of the condenser shell is larger than the cross-section of the air guide hole toward the bottom of the condenser shell.

[0011] As a further description of the above technical solution: one end of the bellows is detachably connected to the connecting pipe through a first flange, and the other end of the bellows is detachably connected to the fixed pipe through a second flange.

[0012] As a further description of the above technical solution: the condenser tube includes a plurality of middle sections arranged along the height direction of the condenser shell, and both ends of the middle sections are provided with annular sections connected thereto, and joints are provided on the annular sections through mounting pipes.

[0013] As a further description of the above technical solution: the condenser shell is arranged on one side of the distillation kettle through a bracket, and the bottom of the bracket and the bottom of the distillation kettle are located in the same plane.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] 1. By adjusting the condensation area, the fractionation effect in the distillation process can be optimized. When separating impurities with lower boiling points, the condensation area can be reduced so that the impurities can be quickly condensed and separated. When separating impurities with higher boiling points, the condensation area can be increased to extend the residence time of steam in the condenser and improve the condensation efficiency, thereby greatly improving the distillation extraction efficiency.

[0016] 2. The steam generated by distillation enters the condenser evenly through the air guide holes on the air guide plate, making the steam more dispersed in the condenser shell, so that the steam can fully and evenly contact the condenser tube, which can effectively increase the condensation speed and thus improve the distillation efficiency of p-phenylenediamine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure schematic diagram provided according to the embodiment of the utility model is shown;

[0018] Figure 2 A partial structural schematic diagram according to an embodiment of the utility model is shown;

[0019] Figure 3 A schematic diagram of the structure of an adjustment component provided according to an embodiment of the utility model is shown;

[0020] Figure 4 A schematic diagram of the structure of a positioning assembly provided according to an embodiment of the utility model is shown;

[0021] Figure 5 A schematic diagram of the structure of an air guide plate provided according to an embodiment of the utility model is shown;

[0022] Figure 6 A schematic diagram of the structure of a bellows provided according to an embodiment of the utility model is shown;

[0023] Figure 7 A schematic structural diagram of a condenser provided according to an embodiment of the utility model is shown.

[0024] Legend:

[0025] 1. Distillation kettle; 2. Connecting pipe; 3. Bellows; 31. First flange; 32. Second flange; 4. Condenser shell; 5. Condenser tube; 51. Middle section; 52. Ring section; 53. Mounting tube; 54. Connector; 6. Adjustment assembly; 61. Piston; 62. Fixing tube; 63. Connecting tube; 64. Air guide plate; 65. Air guide hole; 66. Adjustment plate; 661. Positioning screw hole; 67. Handle; 7. Positioning assembly; 71. Positioning sleeve; 72. Bolt seat; 73. Positioning bolt; 8. Discharge pipe; 9. Bracket. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Reference Figure 1-Figure 7The present embodiment provides a p-phenylenediamine distillation and extraction device, comprising a still 1 and a condenser shell 4, wherein the condenser shell 4 is arranged on one side of the still 1 through a bracket 9, a bellows 3 connected to the still 1 is arranged on the top of the still 1 through a connecting pipe 2, a condenser 5 is arranged inside the condenser shell 4, an adjustment component 6 for adjusting the contact area between steam and the condenser 5 is arranged on the condenser shell 4, and the bellows 3 is connected to the inside of the condenser shell 4 through the adjustment component 6, a positioning component 7 is arranged on the top of the condenser shell 4, and a discharge pipe 8 connected to the inside of the condenser shell 4 is arranged at the bottom of the condenser shell 4.

[0028] In the utility model, the bottom of the bracket 9 and the bottom of the distillation kettle 1 are located in the same plane, and the condenser shell 4 is fixed to one side of the distillation kettle 1 by the bracket 9, and the p-phenylenediamine to be distilled and purified is placed in the distillation kettle 1 for distillation, and the steam generated by the distillation passes through the connecting pipe 2 and the bellows 3 and then enters the condenser shell 4 through the regulating component 6, and the condenser tube 5 in the condenser shell 4 is circulated with coolant through an external circulating pump, and the steam entering the condenser shell 4 is condensed after contacting the condenser tube 5, and the condensed p-phenylenediamine solution can be discharged through the discharge pipe 8;

[0029] It should be noted that the condensation area of ​​the condenser 5 is adjusted by the cooperation of the adjusting component 6 and the positioning component 7. When separating impurities with a lower boiling point, the adjusting component 6 is pressed down to reduce the condensation area, and the impurities can be quickly condensed and separated. When separating impurities with a higher boiling point, the adjusting component 6 is moved up to increase the condensation area, thereby extending the residence time of steam in the condenser, thereby improving the condensation efficiency.

[0030] Specifically, Figure 1-Figure 3 As shown, the adjustment assembly 6 includes a piston 61 movably mounted inside the condenser housing 4, a fixed tube 62 connected to the bellows 3 is provided at the middle position of the piston 61, an air guide plate 64 is provided at the bottom of the piston 61 through a connecting tube 63, and an air guide hole 65 is opened on the air guide plate 64, and an adjustment plate 66 penetrating the condenser housing 4 is provided on the upper side of the piston 61 at positions on both sides of the fixed tube 62, and a handle 67 is provided on the top of the adjustment plate 66.

[0031] When the condensation area needs to be adjusted, the operator holds the handle 67 and then pulls the adjustment plate 66 to move up and down. The adjustment plate 66 drives the piston 61 to move in the condenser housing 4. The piston 61 divides the interior of the condenser housing 4 into an upper adjustment space and a lower condensation space. When the adjustment plate 66 drives the piston 61 to move up and down, the condensation space will increase or decrease accordingly, thereby realizing the adjustment of the condensation area, and then when targeting impurities with different boiling points, the low-boiling-point impurities can be quickly separated, and the high-boiling-point impurities can be fully condensed. The lower end of the fixed pipe 62 passes through the piston 61 and is connected to the connecting tube 63. The steam generated by the distillation kettle 1 passes through the bellows 3 and then enters the connecting tube 63 through the fixed pipe 62. Then, the steam is evenly entered into the condensation space by the air guide holes 65 on the air guide plate 64, so that it is fully and evenly in contact with the condenser tube 5, thereby improving the condensation efficiency.

[0032] It should be noted that the condenser 5 passes through the air guide plate 64 and the piston 61 and is movably connected with the air guide plate 64 and the piston 61, so as to ensure that the piston 61 can move up and down in the condenser housing 4, and further ensure that the adjustment component 6 can adjust the condensation area in the condenser housing 4.

[0033] Specifically, Figure 2 and Figure 3 As shown, the positioning assembly 7 includes a positioning sleeve 71 fixed to the top of the condenser housing 4, and a positioning bolt 73 is provided on one side of the positioning sleeve 71 through a bolt seat 72. The number of positioning screw holes 661 is several and evenly arranged along the height direction of the adjustment plate 66;

[0034] The adjusting plate 66 passes through the positioning sleeve 71 and is movably connected thereto. A positioning screw hole 661 matched with the positioning bolt 73 is formed on the adjusting plate 66 .

[0035] Among them, when the adjustment plate 66 is used to drive the piston 61 to adjust the condensation area, the positioning bolt 73 of the bolt seat 72 on the positioning sleeve 71 is first loosened to disengage the positioning bolt 73 from the positioning screw hole 661 of the adjustment plate 66. Then the operator can pull the adjustment plate 66 to drive the piston 61 to move. After the piston 61 is adjusted to a good position, the positioning bolt 73 can be screwed into the positioning screw hole 661 at the corresponding position to fix the adjustment plate 66, thereby freeing the operator's hands and eliminating the need to hold the fixed adjustment plate 66 all the time.

[0036] Specifically, Figure 3 and Figure 5 As shown, the air guide hole 65 is in a truncated cone shape, and the cross section of the air guide hole 65 toward the top of the condenser shell 4 is larger than the cross section of the air guide hole 65 toward the bottom of the condenser shell 4.

[0037] Among them, the expanded end of the truncated cone-shaped air guide hole 65 faces the inside of the connecting tube 63. When the steam enters the condenser shell 4 through the air guide hole 65, the steam enters from the wide mouth and sprays out from the narrow mouth, which can increase the speed of the steam and increase the contact frequency between the steam and the condenser tube 5, thereby accelerating the condensation speed of the steam and improving the distillation efficiency.

[0038] Specifically, Figure 1 and Figure 6 As shown, one end of the bellows 3 is detachably connected to the connecting pipe 2 through the first flange 31, and the other end of the bellows 3 is detachably connected to the fixing pipe 62 through the second flange 32. The bellows 3 can be easily disassembled through the first flange 31 and the second flange 32, thereby facilitating the separation of the condenser from the distillation kettle 1 and facilitating the maintenance and repair of the condenser.

[0039] Specifically, Figure 2 and Figure 7 As shown, the condenser tube 5 includes a plurality of middle sections 51 arranged along the height direction of the condenser shell 4 , and both ends of the middle section 51 are provided with annular sections 52 connected thereto, and joints 54 are provided on the annular sections 52 through mounting tubes 53 .

[0040] Among them, the condenser 5 is connected to the circulation pump of the coolant through the joint 54 of the installation pipe 53, so that the coolant can circulate into the condenser 5, and several intermediate sections 51 can increase the contact area between the condenser 5 and the steam, thereby increasing the condensation speed during condensation.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A p-phenylenediamine distillation and extraction device, characterized in that: The invention comprises a distillation kettle (1) and a condenser shell (4), wherein the top of the distillation kettle (1) is provided with a bellows (3) connected thereto via a connecting pipe (2), a condenser (5) is provided inside the condenser shell (4), an adjustment component (6) for adjusting the contact area between steam and the condenser (5) is provided on the condenser shell (4), and the bellows (3) is connected to the interior of the condenser shell (4) via the adjustment component (6), a positioning component (7) is provided on the top of the condenser shell (4), and a discharge pipe (8) connected to the interior of the condenser shell (4) is provided at the bottom of the condenser shell (4).

2. A p-phenylenediamine distillation and extraction device according to claim 1, characterized in that: The adjustment assembly (6) comprises a piston (61) movably mounted inside the condenser housing (4); a fixed tube (62) connected to the bellows (3) is arranged at the middle position of the piston (61); an air guide plate (64) is arranged at the bottom of the piston (61) through a connecting tube (63); and an air guide hole (65) is opened on the air guide plate (64); an adjustment plate (66) penetrating the condenser housing (4) is arranged at positions on both sides of the fixed tube (62) on the upper side of the piston (61); and a handle (67) is arranged on the top of the adjustment plate (66).

3. A p-phenylenediamine distillation and extraction device according to claim 2, characterized in that: The positioning assembly (7) comprises a positioning sleeve (71) fixed to the top of the condenser housing (4), and a positioning bolt (73) is provided on one side of the positioning sleeve (71) via a bolt seat (72); The adjustment plate (66) passes through the positioning sleeve (71) and is movably connected thereto. The adjustment plate (66) is provided with a positioning screw hole (661) matched with the positioning bolt (73).

4. A p-phenylenediamine distillation and extraction device according to claim 3, characterized in that: The number of the positioning screw holes (661) is several and they are evenly arranged along the height direction of the adjustment plate (66).

5. A p-phenylenediamine distillation and extraction device according to claim 2, 3 or 4, characterized in that: The air guide hole (65) is in a truncated cone shape, and the cross section of the air guide hole (65) at one end facing the top of the condenser shell (4) is larger than the cross section of the air guide hole (65) at one end facing the bottom of the condenser shell (4).

6. A p-phenylenediamine distillation and extraction device according to claim 2, characterized in that: One end of the bellows (3) is detachably connected to the connecting pipe (2) via a first flange (31), and the other end of the bellows (3) is detachably connected to the fixing pipe (62) via a second flange (32).

7. The p-phenylenediamine distillation and extraction device according to claim 1, characterized in that: The condenser tube (5) comprises a plurality of middle sections (51) arranged along the height direction of the condenser shell (4), and an annular section (52) connected thereto is provided at both ends of the middle section (51), and a joint (54) is provided on the annular section (52) via a mounting tube (53).

8. The p-phenylenediamine distillation and extraction device according to claim 1, characterized in that: The condenser shell (4) is arranged on one side of the distillation kettle (1) via a bracket (9), and the bottom of the bracket (9) and the bottom of the distillation kettle (1) are located in the same plane.

Images