Efficient and stable solvent recovery and nitrogen recovery device
By designing an efficient and stable solvent recovery and nitrogen recovery device including an insulation shell and a condenser tube, the problems of low solvent recovery efficiency and high cost in drug production are solved, and efficient recovery and separation of solvent and nitrogen are achieved.
Patent Information
- Application Number
- CN202421566940.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-04
AI Technical Summary
In pharmaceutical production, low boiling point solvents are difficult to recover during drying, and the existing recycling methods are inefficient and costly, and lack full utilization of inert gases.
An efficient and stable solvent recovery and nitrogen recovery device was designed. By setting up an insulation shell and a condensing tube, the water vapor and organic solvent were captured at low temperature by using the condenser tube, and the solvent separation and recycling were carried out in combination with the treatment box.
The recovery rate of solvent and nitrogen is improved, production costs are reduced, and the effective utilization of inert gas is achieved.
Smart Images
Figure CN222788841U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pharmaceutical machinery, in particular to a highly efficient and stable solvent recovery and nitrogen recovery device. Background Art
[0002] In pharmaceutical production, drying is a necessary stage in the production process. At present, the drying method of materials is mainly carried out in a dryer, and the drying medium is directly in contact with the material and dried by heat conduction, such as air flow drying, and the material is dried by jacket heating. For some materials that require low-boiling point solvents in the production process, the solvents will evaporate after heating and are difficult to recover. In addition, inert gas is required in the drying process to isolate the air and avoid the explosion of the solvent during the high-temperature drying process of the material.
[0003] The commonly used spraying method for solvent recovery is not only inefficient, but also requires further separation and purification of the recovered solvent, resulting in high processing costs. In addition, the inert gas is not fully utilized, resulting in high production costs.
[0004] To this end, we propose an efficient and stable solvent recovery and nitrogen recovery device. Summary of the invention
[0005] The purpose of the utility model is to provide an efficient and stable solvent recovery and nitrogen recovery device to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an efficient and stable solvent recovery and nitrogen recovery device, comprising an insulation shell, a condensing agent inlet pipe is fixedly installed on the bottom of one side of the insulation shell, a dispersion pipe located above the condensing agent inlet pipe is fixedly installed on one side of the insulation shell, a condensing agent outlet pipe is fixedly installed on the top of the other side of the insulation shell, a guide plate is provided at the bottom of the insulation shell, a nitrogen outlet is provided on the top of the insulation shell, a guide hole is provided in the middle of the bottom of the insulation shell, one end of the condensing agent inlet pipe and the condensing agent outlet pipe are fixedly installed with a dispersion pipe located inside the insulation shell, an air inlet pipe is fixedly installed on one end of the dispersion pipe, a condensing pipe is connected between the two dispersion pipes, a connecting pipe is fixedly installed at the bottom of the guide hole, a treatment box is provided on the top of the connecting pipe, and a discharge pipe is provided on one side of the treatment box.
[0007] Optionally, two ends of the condenser are respectively connected to two dispersion pipes and fixedly installed, the condenser is in a reciprocating "X" shape, and a plurality of guide plates are fixedly installed inside the insulation shell.
[0008] Optionally, the top of the air dispersing duct is located below the guide plate, the connection between the air dispersing duct and the insulation shell is rectangular, and the length of the connection between the air dispersing duct and the insulation shell is not greater than the length of the dispersing pipe.
[0009] Optionally, a liquid inlet pipe is provided on one side of the bottom of the connecting pipe, the bottom of the liquid inlet pipe is fixedly installed through the top of the processing box, and a drain pipe is provided on the other side of the bottom of the connecting pipe.
[0010] Optionally, the middle parts of the drainage pipe and the liquid inlet pipe are respectively provided with electric control valves, and the interior of the processing box is provided with a filter screen and a water absorption plate in sequence from top to bottom.
[0011] Optionally, the connection between the discharge pipe and the processing box is located at the bottom of one side of the processing box, and a stop valve is provided in the middle of the discharge pipe.
[0012] Optionally, the guide plates are located between the bent condensing tubes, the guide plates are arranged to be inclined downward, and adjacent guide plates are arranged in a staggered manner inside the heat-insulating shell.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The efficient and stable solvent recovery and nitrogen recovery device is provided with an insulation shell. The refrigerant enters the condenser tube from the condenser inlet pipe and then returns to the external compressor from the condenser outlet. The temperature of the condenser tube is reduced to dozens of degrees below zero through the refrigerant heat exchange. The nitrogen mixed with the organic solvent enters the insulation shell through the diffuser duct. The water vapor is captured by the condenser tube with extremely low temperature and frosts on the surface of the condenser tube. The organic solvent condenses into droplets under the influence of the low temperature of the condenser tube. The droplets fall onto the guide plate and the guide plate under the influence of gravity and flow to the guide holes, and then flow out from the connecting pipe to the processing box to complete the recovery of the organic solvent. The nitrogen is discharged through the nitrogen outlet for recovery. The nitrogen and the solvent are separated and recovered by the different liquefaction temperatures, thereby improving the recovery rate of the solvent and the nitrogen.
[0015] The efficient and stable solvent recovery and nitrogen recovery device is provided with a processing box, and the liquefied solvent flows into the connecting pipe, while the electric control valve of the drain pipe is closed and the electric control valve of the liquid inlet pipe is opened, and the solvent flows into the processing box through the liquid inlet pipe and is processed through a filter screen and a water absorption plate, and the processed solvent stays at the bottom of the processing box and is discharged and collected through a discharge pipe. After the solvent is collected, the electric control valve of the liquid inlet pipe is closed, the electric control valve of the drain pipe is opened, and the defrost water is discharged through the drain pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of a highly efficient and stable solvent recovery and nitrogen recovery device of the utility model;
[0017] Figure 2This is a schematic diagram of the structure of an insulation shell of a highly efficient and stable solvent recovery and nitrogen recovery device of the utility model;
[0018] Figure 3 This is a schematic structural diagram of a condenser tube of a highly efficient and stable solvent recovery and nitrogen recovery device of the utility model;
[0019] Figure 4 The utility model is a schematic diagram of the structure of a processing box of a highly efficient and stable solvent recovery and nitrogen recovery device.
[0020] In the figure: 1. insulation shell; 2. treatment box; 3. condenser inlet pipe; 4. dispersion pipe; 5. air inlet pipe; 6. condenser outlet pipe; 7. dispersion pipe; 8. condenser pipe; 9. guide plate; 10. guide plate; 11. guide hole; 12. connecting pipe; 13. filter screen; 14. water absorption plate; 15. discharge pipe; 16. stop valve; 17. nitrogen outlet; 18. liquid inlet pipe; 19. drain pipe; 20. electric control valve. DETAILED DESCRIPTION
[0021] 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 in 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.
[0022] See also Figures 1 to 4The utility model provides an efficient and stable solvent recovery and nitrogen recovery device, comprising an insulation shell 1, a condensing agent inlet pipe 3 is fixedly installed through the bottom of one side of the insulation shell 1, a dispersion pipe 4 located above the condensing agent inlet pipe 3 is fixedly installed on one side of the insulation shell 1, a condensing agent outlet pipe 6 is fixedly installed through the top of the other side of the insulation shell 1, a guide plate 10 is arranged at the bottom of the insulation shell 1, a nitrogen outlet 17 is arranged at the top of the insulation shell 1, a guide hole 11 is opened in the middle of the bottom of the insulation shell 1, a dispersion pipe 7 located inside the insulation shell 1 is fixedly installed at one end of the condensing agent inlet pipe 3 and the condensing agent outlet pipe 6, an air inlet pipe 5 is fixedly installed at one end of the dispersion pipe 4, a condensing pipe 8 is arranged between the two dispersion pipes 7, a connecting pipe 12 is fixedly installed at the bottom of the guide hole 11, and a processing Box 2, a discharge pipe 15 is arranged on one side of the treatment box 2. By arranging the insulation shell 1, the refrigerant enters the condenser 8 from the condenser inlet pipe 3, and then comes out from the condenser outlet to return to the external compressor. The temperature of the condenser 8 is reduced to dozens of degrees below zero through the refrigerant heat exchange, and the nitrogen mixed with the organic solvent enters the insulation shell 1 through the air dispersion pipe 4. The water vapor is captured by the extremely low temperature of the condenser 8 and frost is formed on the surface of the condenser 8. The organic solvent is condensed into droplets due to the low temperature of the condenser 8. The droplets fall onto the guide plate 9 and the guide plate 10 due to gravity, and flow to the guide hole 11, and then flow out from the connecting pipe 12 to the treatment box 2 to complete the recovery of the organic solvent, and the nitrogen is discharged through the nitrogen outlet 17 for recovery. The nitrogen and the solvent are separated and recovered due to the different liquefaction temperatures, thereby improving the recovery rate of the solvent and the nitrogen.
[0023] The two ends of the condenser tube 8 are respectively connected and fixedly installed with two dispersion tubes 7. The shape of the condenser tube 8 is a reciprocating "X" shape. A plurality of guide plates 9 are fixedly installed inside the insulation shell 1. The guide plates 9 are located between the bent condenser tubes 8. The guide plates 9 are arranged obliquely downward. Adjacent guide plates 9 are arranged in an interlaced manner inside the insulation shell 1. The top of the dispersion pipe 4 is located below the guide plates 9. The connection between the dispersion pipe 4 and the insulation shell 1 is rectangular. The length of the connection between the dispersion pipe 4 and the insulation shell 1 is not greater than the length of the dispersion pipe.
[0024] A liquid inlet pipe 18 is connected to one side of the bottom of the connecting pipe 12, and the bottom of the liquid inlet pipe 18 is fixedly installed through the top of the processing box 2. A drain pipe 19 is connected to the other side of the bottom of the connecting pipe 12. The middle of the drain pipe 19 and the liquid inlet pipe 18 are respectively provided with an electric control valve 20. The inside of the processing box 2 is provided with a filter screen 13 and a water absorption plate 14 from top to bottom. The connection between the discharge pipe 15 and the processing box 2 is located at the bottom of one side of the processing box 2. A stop valve 16 is provided in the middle of the discharge pipe 15. By setting up the processing box 2, the liquefied solvent flows into the connecting pipe 12, and at the same time the electric control valve 20 of the drain pipe 19 is closed, and the electric control valve 20 of the liquid inlet pipe 18 is opened, and the solvent flows into the processing box 2 through the liquid inlet pipe 18 and is processed through the filter screen 13 and the water absorption plate 14. The processed solvent stays at the bottom of the processing box 2 and is discharged and collected through the discharge pipe 15. After the solvent is collected, the electric control valve 20 of the liquid inlet pipe 18 is closed, and the electric control valve 20 of the drain pipe 19 is opened, and the defrost water is discharged through the drain pipe 19.
[0025] Working principle:
[0026] The refrigerant enters the condenser tube 8 from the condenser inlet pipe 3, and then comes out from the condenser outlet and returns to the external compressor. The temperature of the condenser tube 8 is reduced to dozens of degrees below zero through the refrigerant heat exchange. The nitrogen mixed with the organic solvent enters the interior of the insulation shell 1 through the diffuser duct 4. The water vapor is captured by the extremely low temperature condenser tube 8 and frosts on the surface of the condenser tube 8. The organic solvent is condensed into droplets under the influence of the low temperature of the condenser tube 8. The droplets fall to the guide plate 9 and the guide plate 10 under the influence of gravity, and flow to the guide hole 11, and then from the connection The defrost water flows out of the pipe 12, and the liquefied solvent flows into the connecting pipe 12. At the same time, the electric control valve 20 of the drain pipe 19 is closed, and the electric control valve 20 of the liquid inlet pipe 18 is opened. The solvent flows into the processing box 2 through the liquid inlet pipe 18 and is processed through the filter screen 13 and the water absorption plate 14. The processed solvent stays at the bottom of the processing box 2 and is discharged and collected through the discharge pipe 15. After the solvent is collected, the electric control valve 20 of the liquid inlet pipe 18 is closed, and the electric control valve 20 of the drain pipe 19 is opened, and the defrost water is discharged through the drain pipe 19.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated 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 that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An efficient and stable solvent recovery and nitrogen recovery device, comprising a heat-insulating shell (1), characterized in that: A condensing agent inlet pipe (3) is fixedly mounted through the bottom of one side of the insulation shell (1), a dispersing pipe (4) located above the condensing agent inlet pipe (3) is fixedly mounted on one side of the insulation shell (1), a condensing agent outlet pipe (6) is fixedly mounted through the top of the other side of the insulation shell (1), a guide plate (10) is arranged at the bottom of the insulation shell (1), a nitrogen outlet (17) is arranged at the top of the insulation shell (1), a guide hole (11) is opened in the middle of the bottom of the insulation shell (1), a dispersing pipe (7) located inside the insulation shell (1) is fixedly mounted at one end of the condensing agent inlet pipe (3) and the condensing agent outlet pipe, an air inlet pipe (5) is fixedly mounted at one end of the dispersing pipe (4), a condensing pipe (8) is arranged between the two dispersing pipes (7), a connecting pipe (12) is fixedly mounted at the bottom of the guide hole (11), a processing box (2) is arranged at the top of the connecting pipe (12), and a discharge pipe (15) is arranged at one side of the processing box (2).
2. The highly efficient and stable solvent recovery and nitrogen recovery device according to claim 1, characterized in that: The two ends of the condenser pipe (8) are respectively connected to two dispersion pipes (7) and fixedly installed. The shape of the condenser pipe (8) is a reciprocating "X" shape. A plurality of guide plates (9) are fixedly installed inside the heat-insulating shell (1).
3. The highly efficient and stable solvent recovery and nitrogen recovery device according to claim 2, characterized in that: The top of the air dispersion pipe (4) is located below the guide plate (9); the connection between the air dispersion pipe (4) and the heat-insulating shell (1) is rectangular; and the length of the connection between the air dispersion pipe (4) and the heat-insulating shell (1) is not greater than the length of the dispersion pipe.
4. The highly efficient and stable solvent recovery and nitrogen recovery device according to claim 1, characterized in that: One side of the bottom of the connecting pipe (12) is connected to a liquid inlet pipe (18), the bottom of the liquid inlet pipe (18) penetrates and is fixedly installed with the top of the processing box (2), and the other side of the bottom of the connecting pipe (12) is connected to a drain pipe (19).
5. The highly efficient and stable solvent recovery and nitrogen recovery device according to claim 4, characterized in that: The middle parts of the drainage pipe (19) and the liquid inlet pipe (18) are respectively provided with electric control valves (20), and the interior of the processing box (2) is provided with a filter screen (13) and a water absorption plate (14) in sequence from top to bottom.
6. The highly efficient and stable solvent recovery and nitrogen recovery device according to claim 5, characterized in that: The connection point between the discharge pipe (15) and the processing box (2) is located at the bottom of one side of the processing box (2), and a stop valve (16) is provided in the middle of the discharge pipe (15).
7. The highly efficient and stable solvent recovery and nitrogen recovery device according to claim 2, characterized in that: The guide plates (9) are located between the bent condensing tubes (8); the guide plates (9) are arranged to be inclined downward; and adjacent guide plates (9) are arranged in a staggered manner inside the heat-insulating shell (1).