Dimethylacetamide purification device

Abstract

The utility model relates to the technical field of purification devices, and discloses a dimethylacetamide purification device which comprises an inlet pipe, a flange is fixedly connected to one side face of the inlet pipe, a positioning hole is formed in one outer side face of the flange, and the arrangement of the flange and the positioning hole can improve the inlet stability of dimethylacetamide and prevent leakage. One end of the inlet pipe is fixedly connected with a fractionating tower, the lower surface of the fractionating tower is fixedly connected with a mounting seat, and a hot gas inlet end is fixedly connected below one side surface of the fractionating tower. The device has the following advantages and effects that by arranging the fractionating tower, the cooler and the filtering bin, dimethylacetamide is fractionated through the fractionating tower, part of impurities are discharged from the reactant discharge port, dimethylacetamide is separated from water through the cooler and injected into the temporary storage cylinder, certain pressure is provided through the pump, and the impurities in the dimethylacetamide are separated through the filter bin. Residual water is separated out from the filtering bin, dimethylacetamide is discharged from the discharging pipe, and the simple and efficient effects are achieved through fractionation and filtration.

Description

Technical Field

[0001] The utility model relates to the technical field of purification devices, in particular to a dimethylacetamide purification device. Background Art

[0002] Dimethylacetamide (DMAc), short for N,N-dimethylacetamide, is an important chemical raw material and excellent organic solvent. It is widely used in petrochemicals, organic synthesis, plastic films, acrylonitrile spinning, polyethersulfone spinning, pharmaceuticals, pesticides, and dyes. DMAc is in high demand, and after use, it often exists in the form of a dilute aqueous solution. Economically and efficiently recovering it and reducing unit energy consumption has important economic, social, and environmental benefits.

[0003] According to Chinese patent number CN218076417U, a dimethylacetamide purification device is provided, including a preheating unit, a light removal unit, a heavy removal unit and a finished product recovery unit; the preheating unit, the light removal unit, the heavy removal unit and the finished product recovery unit are connected in sequence; the light removal unit includes a light removal tower, a primary reboiler and a compressor. The technical solution of the utility model adopts energy-saving mechanical vapor recompression technology in combination, and the energy consumption of evaporating 1 ton of water is approximately 1 / 4 to 1 / 3 of that of a traditional evaporator, with high thermal efficiency and low power consumption. The mechanical vapor recompression technology is adopted, and a smaller amount of fresh steam is used for heating, which reduces dependence on boiler equipment, reduces pollutants, is pollution-free to the environment, and is more energy-saving and environmentally friendly. At the same time, the process flow of the device is simple, easy to implement, has a high degree of automation, low operating costs, meets the requirements of sustainable development, and can be widely used in actual industrial production processes.

[0004] The above patent has the advantage of low cost, but the process is relatively complicated and the procedures are troublesome during use, which is very inconvenient. Utility Model Content

[0005] The purpose of the utility model is to provide a dimethylacetamide purification device with simple and efficient effects.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: a dimethylacetamide purification device, including an inlet pipe, one end of the inlet pipe is fixedly connected to a distillation tower, the middle part of the lower surface of the distillation tower is fixedly connected to a reactant discharge port, the upper surface of the distillation tower is fixedly connected to a cooler, the lower part of the cooler is fixedly connected to a material discharge pipe, the bottom of the material discharge pipe is fixedly connected to a temporary storage cylinder, one end of the temporary storage cylinder is fixedly connected to a pump, the output end of the pump is fixedly connected to a filter bin, one end of the filter bin is fixedly connected to a drain pipe, the lower surface of the filter bin is fixedly connected to a discharge pipe, and the lower surface of the discharge pipe is fixedly connected to a valve.

[0007] By adopting the above technical solution, through the arrangement of the fractionation tower, the cooler and the filter chamber, dimethylacetamide is first fractionated by the fractionation tower, and a portion of impurities is discharged from the reactant discharge port. Dimethylacetamide is separated from water by the cooler and injected into a temporary storage cylinder. A certain pressure is provided by a pump to separate the residual water from the filter chamber, and dimethylacetamide is discharged from the discharge pipe. Through fractionation and filtration, a simple and efficient effect is achieved.

[0008] The present invention is further configured as follows: a flange is fixedly connected to one side of the inlet pipe, and a positioning hole is provided on an outer side of the flange.

[0009] By adopting the above technical solution, the arrangement of the flange and the positioning hole can improve the stability of dimethylacetamide introduction and prevent leakage.

[0010] The present invention is further configured as follows: a mounting seat is fixedly connected to the lower surface of the fractionating tower, and a hot air inlet end is fixedly connected to the lower portion of one side surface of the fractionating tower.

[0011] By adopting the above technical solution, the arrangement of the mounting base improves the installation stability of the fractionation tower, and the arrangement of the hot gas inlet end ensures a normal fractionation effect.

[0012] The present invention is further configured as follows: a grid plate structure is fixedly connected to the inner wall of the fractionating tower, and the number of the grid plate structures is five.

[0013] By adopting the above technical solution, the setting of the grid plate structure can ensure the distillation effect and improve the efficiency of the distillation effect.

[0014] The present invention is further configured as follows: the grid plate structure includes a folding plate, and one end of the folding plate is fixedly connected to a sieve plate.

[0015] By adopting the above technical solution, the arrangement of the folding plates can facilitate the stratification of the liquid, the sieve plates can allow the liquid to pass through, and the device can be fully fractionated.

[0016] The present invention is further configured as follows: one end of the reactant discharge port passes through the mounting seat and is arranged on the front side of the mounting seat.

[0017] By adopting the above technical solution, the setting of the reactant discharge port can recover the reactants, which can be recovered while preventing pollution and reducing costs.

[0018] The present invention is further configured as follows: one end of the cooler is fixedly connected to an exhaust hole.

[0019] By adopting the above technical solution, the setting of the exhaust hole can discharge water vapor and improve the purity.

[0020] The present invention is further configured as follows: one end of the material discharge pipe is fixedly connected to a reflux end, and the reflux end is fixedly connected above a side surface of the distillation tower.

[0021] By adopting the above technical solution, the setting of the reflux end can ensure normal reflux of the device and improve the distillation accuracy.

[0022] The present invention is further configured as follows: a rubber pad is fixedly connected to the lower surface of the temporary storage cylinder, and anti-slip grooves are provided on the lower surface of the rubber pad.

[0023] By adopting the above technical solution, the provision of the rubber pad can improve the stability of the temporary storage tube and prevent it from tipping over.

[0024] The present invention is further configured as follows: the filter chamber comprises a shell, and one end of the shell is fixedly connected to a special membrane separation layer.

[0025] By adopting the above technical solution, the setting of the filtration chamber can utilize a special membrane separation layer to fully separate dimethylacetamide and water.

[0026] The beneficial effects of the utility model are as follows: through the arrangement of the fractionating tower, the cooler and the filtering bin, dimethylacetamide is first fractionated by the fractionating tower, a portion of impurities are discharged from the reactant discharge port, dimethylacetamide is separated from water by the cooler and injected into a temporary storage cylinder, a certain pressure is provided by a pump to separate the residual water from the filtering bin, and dimethylacetamide is discharged from the discharge pipe, and a simple and efficient effect is achieved through fractional distillation and filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the shaft side structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure of the fractionating tower of the utility model;

[0030] Figure 3 For this utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter bin of the present utility model.

[0032] In the figure, 1. inlet pipe; 2. distillation tower; 3. reactant outlet; 4. cooler; 5. material discharge pipe; 6. temporary storage cylinder; 7. pump; 8. filter bin; 9. drain pipe; 10. discharge pipe; 11. valve; 12. flange; 13. positioning hole; 14. mounting seat; 15. hot air inlet end; 16. grid structure; 17. exhaust hole; 18. reflux end; 19. rubber pad; 801. shell; 802. special membrane separation layer; 1601. folded plate; 1602. sieve plate. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0034] Reference Figure 1-4A dimethylacetamide purification device includes an inlet pipe 1, a flange 12 is fixedly connected to one side of the inlet pipe 1, and a positioning hole 13 is opened on the outer side of the flange 12. The arrangement of the flange and the positioning hole can improve the stability of dimethylacetamide introduction and prevent leakage. One end of the inlet pipe 1 is fixedly connected to a distillation tower 2, and a mounting seat 14 is fixedly connected to the lower surface of the distillation tower 2. A hot gas inlet end 15 is fixedly connected to the lower side of one side of the distillation tower 2. The arrangement of the mounting seat improves the installation stability of the distillation tower. The arrangement of the hot gas inlet end ensures a normal fractionation effect. The inner wall of the distillation tower 2 is fixedly connected to the A grid structure 16 is connected, and the number of grid structures 16 is five. The setting of the grid structure can ensure the fractionation effect and improve the efficiency of the fractionation effect. The grid structure 16 includes a folding plate 1601, and one end of the folding plate 1601 is fixedly connected to a sieve plate 1602. The setting of the folding plate can facilitate the stratification of the liquid. The sieve plate 1602 can pass the liquid, which promotes the device to fully fractionate. The middle part of the lower surface of the distillation tower 2 is fixedly connected to a reactant discharge port 3. One end of the reactant discharge port 3 passes through the mounting seat 14 and is arranged on the front of the mounting seat 14. The setting of the reactant discharge port can recover the reactant. While preventing pollution, it can be recycled and reduce costs. The upper surface of the distillation tower 2 is fixedly connected to a cooler 4, and one end of the cooler 4 is fixedly connected to an exhaust hole 17. The setting of the exhaust hole can discharge water vapor to improve the purity. The lower part of the cooler 4 is fixedly connected to a material discharge pipe 5, and one end of the material discharge pipe 5 is fixedly connected to a reflux end 18. The reflux end 18 is fixedly connected to the top of one side of the distillation tower 2. The setting of the reflux end can ensure normal reflux of the device and improve the fractionation accuracy. The bottom of the material discharge pipe 5 is fixedly connected to a temporary storage tube 6, and the lower surface of the temporary storage tube 6 is fixedly connected to a rubber pad 19. The lower surface of the rubber pad 19 is provided with anti-slip grooves. The setting of the rubber pad can improve the stability of the temporary storage tube and prevent it from tipping over. One end of the temporary storage tube 6 is fixedly connected to the pump 7, and the output end of the pump 7 is fixedly connected to the filter bin 8. The filter bin 8 includes a shell 801, and one end of the shell 801 is fixedly connected to the special membrane separation layer 802. The setting of the filter bin can utilize the special membrane separation layer to fully separate dimethylacetamide and water. One end of the filter bin 8 is fixedly connected to a drain pipe 9, and the lower surface of the filter bin 8 is fixedly connected to a discharge pipe 10, and the lower surface of the discharge pipe 10 is fixedly connected to a valve 1.

[0035] In the utility model, dimethylacetamide is first fractionated through a fractionating tower 2, and a portion of impurities is discharged from a reactant discharge port 3. Dimethylacetamide is separated from water through a cooler 4 and injected into a temporary storage cylinder 6. A certain pressure is provided by a pump 7 to separate the residual water from a filter bin 8, and dimethylacetamide is discharged from a discharge pipe 10. Through fractionation and filtration through a special membrane separation layer, a simple and efficient effect is achieved.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dimethylacetamide purification device, comprising an inlet pipe (1), characterized in that: One end of the inlet pipe (1) is fixedly connected to a fractionating tower (2), the middle portion of the lower surface of the fractionating tower (2) is fixedly connected to a reactant discharge port (3), the upper surface of the fractionating tower (2) is fixedly connected to a cooler (4), the lower portion of the cooler (4) is fixedly connected to a material discharge pipe (5), the bottom of the material discharge pipe (5) is fixedly connected to a temporary storage cylinder (6), one end of the temporary storage cylinder (6) is fixedly connected to a pump (7), the output end of the pump (7) is fixedly connected to a filter bin (8), one end of the filter bin (8) is fixedly connected to a drain pipe (9), the lower surface of the filter bin (8) is fixedly connected to a discharge pipe (10), and the lower surface of the discharge pipe (10) is fixedly connected to a valve (11).

2. A dimethylacetamide purification device according to claim 1, characterized in that: A flange (12) is fixedly connected to one side of the inlet pipe (1), and a positioning hole (13) is provided on an outer side of the flange (12).

3. A dimethylacetamide purification device according to claim 1, characterized in that: A mounting seat (14) is fixedly connected to the lower surface of the fractionating tower (2), and a hot gas inlet end (15) is fixedly connected below one side surface of the fractionating tower (2).

4. A dimethylacetamide purification device according to claim 3, characterized in that: The inner wall of the fractionating tower (2) is fixedly connected with a grid structure (16), and the number of the grid structures (16) is five.

5. A dimethylacetamide purification device according to claim 4, characterized in that: The grid structure (16) comprises a folding plate (1601), and one end of the folding plate (1601) is fixedly connected to a sieve plate (1602).

6. A dimethylacetamide purification device according to claim 1, characterized in that: One end of the reactant discharge port (3) passes through the mounting seat (14) and is arranged on the front side of the mounting seat (14).

7. A dimethylacetamide purification device according to claim 1, characterized in that: One end of the cooler (4) is fixedly connected to an exhaust hole (17).

8. A dimethylacetamide purification device according to claim 1, characterized in that: One end of the material discharge pipe (5) is fixedly connected to a reflux end (18), and the reflux end (18) is fixedly connected above one side of the fractionation tower (2).

9. A dimethylacetamide purification device according to claim 1, characterized in that: A rubber pad (19) is fixedly connected to the lower surface of the temporary storage cylinder (6), and the lower surface of the rubber pad (19) is provided with anti-slip grooves.

10. A dimethylacetamide purification device according to claim 1, characterized in that: The filtration chamber (8) comprises a shell (801), and a special membrane separation layer (802) is fixedly connected to one end of the shell (801).

Images