2, 5-dimethoxy dihydrofuran purification and separation equipment

Abstract

The utility model relates to the technical field of purification and separation, in particular to 2, 5-dimethoxy dihydrofuran purification and separation equipment which comprises a purification kettle and a separation device arranged at the top end of the purification kettle, and a vacuumizing pipe fixedly connected to the top end of the purification kettle and communicated with the purification kettle is arranged on one side of the separation device. Through the arrangement of a condensation reflux device, a connecting pipe, a fixed cylinder, an L-shaped pipe, a purification cylinder, an air inlet valve, an air outlet valve, a feeding valve, a discharging valve, an air outlet pipe, an adsorption assembly, a fixed pipe and a vacuum pump, when the purification kettle is vacuumized, part of 2, 5-dimethoxy dihydrofuran enters the condensation reflux device and is liquefied and refluxed into the purification kettle; other gas enters the fixing cylinder and is discharged through the L-shaped pipe, harmful substances are absorbed by the organic solvent, then the residual harmful substances in the gas are absorbed by the adsorption block, and the design can fully absorb the harmful substances in the gas during vacuumizing and prevent the harmful substances from harming the external environment.

Description

Technical Field

[0001] This utility model relates to the field of purification and separation technology, specifically to a purification and separation device for 2,5-dimethoxydihydrofuran. Background Technology

[0002] When purifying and separating 2,5-dimethoxydihydrofuran, the difference in boiling points between 2,5-dimethoxydihydrofuran and impurities is usually utilized for separation. The boiling point of 2,5-dimethoxydihydrofuran is relatively fixed. By controlling the distillation temperature and pressure, it can be separated from impurities with different boiling points. In actual operation, a vacuum distillation apparatus is usually used because distilling 2,5-dimethoxydihydrofuran at atmospheric pressure may cause side reactions such as decomposition or polymerization.

[0003] Existing purification and separation equipment is widely used, but due to the need for a reduced pressure environment, vacuuming is often required before and during the use of the equipment. The vacuum pump extracts the gas containing 2,5-dimethoxydihydrofuran, which can lead to environmental pollution and harm the health of operators. Therefore, a 2,5-dimethoxydihydrofuran purification and separation device is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a 2,5-dimethoxydihydrofuran purification and separation device to solve the problem of environmental pollution caused by existing devices in the background art during vacuuming.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A purification and separation device for 2,5-dimethoxydihydrofuran includes a purification vessel and a separation device installed at the top of the purification vessel. A vacuum pipe is fixedly connected to and communicates with the top of the purification vessel on one side of the separation device. An inclined condenser is fixedly connected to the top of the vacuum pipe. A connecting pipe is fixedly connected to the top of the condenser. A vertically arranged fixed cylinder is fixedly connected to the bottom of the connecting pipe. An L-shaped pipe is fixedly connected to the outer wall of the fixed cylinder. A vertically arranged purification cylinder is located outside the fixed cylinder. An inlet valve is fixedly connected to the top of the purification cylinder. An inlet filter assembly is installed at the top of the inlet valve. An outlet valve is fixedly connected to the top of the purification cylinder on one side of the inlet valve. A symmetrically arranged feed valve and discharge valve are fixedly connected to the bottom of the purification cylinder. An outlet pipe is fixedly connected to the top of the outlet valve. An adsorption assembly is installed at the end of the outlet pipe away from the outlet valve. A fixed pipe is fixedly connected to the bottom of the adsorption assembly. A vacuum pump is fixedly connected to the bottom of the fixed pipe.

[0007] Preferably, multiple L-shaped tubes are provided, and the L-shaped tubes are distributed along the polar axis outside the fixed cylinder.

[0008] Preferably, the fixing cylinder is located at the bottom of the inner side of the purification cylinder, and the purification cylinder is fixedly connected to the outside of the connecting pipe.

[0009] Preferably, the air intake filter assembly includes an air intake cylinder fixedly connected to the top of the air intake valve, and an activated carbon block is provided inside the air intake cylinder.

[0010] Preferably, the activated carbon block has a threaded ring at the top that is threaded to the inside of the air inlet cylinder, and a filter screen is fixedly connected to the top of the threaded ring.

[0011] Preferably, the adsorption assembly includes an adsorption box fixedly connected to the bottom end of the air outlet pipe, a sealing ring fixedly connected to the front side of the adsorption box, an adsorption block provided inside the adsorption box, and a baffle provided in front of the adsorption block.

[0012] Preferably, the outer side of the adsorption block is in close contact with the inner side of the adsorption box, the front side of the sealing ring is in close contact with the rear side of the baffle, and the baffle is installed on the front side of the adsorption box.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, through the setting of a condenser reflux device, connecting pipe, fixed cylinder, L-shaped pipe, purification cylinder, air inlet valve, air outlet valve, feed valve, discharge valve, air outlet pipe, adsorption component, fixed pipe and vacuum pump, when the purification kettle is evacuated, part of 2,5-dimethoxydihydrofuran enters the condenser reflux device, liquefies and refluxes back into the purification kettle, and other gases enter the fixed cylinder and are discharged through the L-shaped pipe. Harmful substances are absorbed by organic solvents, and then the remaining harmful substances in the gas are absorbed by the adsorption block. This design can fully absorb the harmful substances in the gas during vacuuming and avoid harmful substances from harming the external environment.

[0015] 2. In this utility model, by setting up an air intake filter assembly, an air intake cylinder, an activated carbon block, a threaded ring, and a filter screen, when replacing the organic solvent, the organic solvent is discharged through the discharge valve and the pump, and the outside air enters the purification cylinder through the air intake cylinder. At this time, the filter screen and the activated carbon block can filter the air and prevent outside dust from entering the purification cylinder. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the activated carbon block installation structure of this utility model;

[0019] Figure 4This is a schematic diagram of the cross-sectional structure of the purification cylinder of this utility model;

[0020] Figure 5 This is a schematic diagram of the installation structure of the adsorption block of this utility model.

[0021] In the diagram: 1. Purification vessel; 2. Separation device; 3. Vacuum tube; 4. Condenser reflux device; 5. Connecting pipe; 6. Fixed cylinder; 7. L-shaped tube; 8. Purification cylinder; 9. Inlet valve; 10. Inlet filter assembly; 101. Inlet cylinder; 102. Activated carbon block; 103. Threaded ring; 104. Filter screen; 11. Outlet valve; 12. Feed valve; 13. Discharge valve; 14. Outlet pipe; 15. Adsorption assembly; 151. Adsorption box; 152. Sealing ring; 153. Adsorption block; 154. Baffle; 16. Fixed tube; 17. Vacuum pump. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] A purification and separation device for 2,5-dimethoxydihydrofuran includes a purification vessel 1 and a separation device 2 installed at the top of the purification vessel 1. A vacuum pipe 3 is fixedly connected to and communicates with the top of the purification vessel 1 on one side of the separation device 2. An inclined condenser reflux device 4 is fixedly connected to the top of the vacuum pipe 3. A connecting pipe 5 is fixedly connected to the top of the condenser reflux device 4. A vertically arranged fixed cylinder 6 is fixedly connected to the bottom of the connecting pipe 5. An L-shaped pipe 7 is fixedly connected to the outer wall of the fixed cylinder 6. A vertically arranged purification cylinder 8 is provided outside the fixed cylinder 6. An air inlet is fixedly connected to the top of the purification cylinder 8. Valve 9 has an intake filter assembly 10 installed at its top. An exhaust valve 11 is fixedly connected to the top of the purification cylinder 8 on one side of the intake valve 9. A feed valve 12 and an exhaust valve 13, arranged symmetrically, are fixedly connected to the bottom of the purification cylinder 8. An exhaust pipe 14 is fixedly connected to the top of the exhaust valve 11. An adsorption assembly 15 is installed at the end of the exhaust pipe 14 furthest from the exhaust valve 11. A fixed pipe 16 is fixedly connected to the bottom of the adsorption assembly 15. A vacuum pump 17 is fixedly connected to the bottom of the fixed pipe 16. Multiple L-shaped tubes 7 are provided, arranged along a polar axis on the outside of the fixed cylinder 6. The fixed cylinder 6 is located within the purification cylinder. The bottom inner side of the purification cylinder 8 is fixedly connected to the outside of the connecting pipe 5. The adsorption assembly 15 includes an adsorption box 151 fixedly connected to the bottom end of the outlet pipe 14. A sealing ring 152 is fixedly connected to the front side of the adsorption box 151. An adsorption block 153 is provided inside the adsorption box 151. A baffle 154 is provided in front of the adsorption block 153. The outer side of the adsorption block 153 is tightly fitted to the inner side of the adsorption box 151. The front side of the sealing ring 152 is tightly fitted to the rear side of the baffle 154. The baffle 154 is installed on the front side of the adsorption box 151. The adsorption assembly 151 is connected to the bottom inner side of the adsorption box 151 via a condenser reflux device 4, a connecting pipe 5, a fixed cylinder 6, and an L-shaped pipe 7. The purification cylinder 8, inlet valve 9, outlet valve 11, feed valve 12, discharge valve 13, outlet pipe 14, adsorption assembly 15, fixed pipe 16, and vacuum pump 17 are used to evacuate the purification vessel 1. When evacuating the purification vessel 1, some 2,5-dimethoxydihydrofuran enters the condenser reflux 4, liquefies and flows back into the purification vessel 1, and other gases enter the fixed cylinder 6 and are discharged through the L-shaped pipe 7. Harmful substances are absorbed by organic solvents, and the remaining harmful substances in the gas are then absorbed by the adsorption block 153. This design can fully absorb the harmful substances in the gas during vacuuming and prevent harmful substances from harming the external environment.

[0027] The air intake filter assembly 10 includes an air intake cylinder 101 fixedly connected to the top of the air intake valve 9. An activated carbon block 102 is provided inside the air intake cylinder 101. A threaded ring 103 is threadedly connected to the top of the activated carbon block 102 inside the air intake cylinder 101. A filter screen 104 is fixedly connected to the top of the threaded ring 103. Through the air intake filter assembly 10, air intake cylinder 101, activated carbon block 102, threaded ring 103 and filter screen 104, when the organic solvent is replaced, the organic solvent is discharged through the discharge valve 13 and the pump. Outside air enters the purification cylinder 8 through the air intake cylinder 101. At this time, the filter screen 104 and activated carbon block 102 can filter the air and prevent outside dust from entering the purification cylinder 8.

[0028] Workflow: Before use, power on the equipment and connect it to the external controller. First, install the various components of the device. Place the activated carbon block 102 inside the air inlet cylinder 101, and screw the threaded ring 103 at the bottom of the filter screen 104 inside the top of the air inlet cylinder 101, thus completing the installation of the air inlet filter assembly 10. Then, place the adsorption block 153 inside the adsorption box 151 and fix the baffle 154 so that the rear side of the baffle 154 is tightly fitted with the front side of the sealing ring 152, thus completing the installation of the adsorption assembly 15. Afterward, introduce the adsorption capacity into the purification cylinder 8 through the feed valve 12. After the organic solvent for 2,5-dimethoxydihydrofuran is introduced, the feed valve 12 is closed, and the device can be used normally. During the purification and separation of 2,5-dimethoxydihydrofuran, the vacuum pump 17 is started. At this time, the gas in the purification vessel 1 enters the condenser reflux unit 4 through the vacuum tube 3. Part of the 2,5-dimethoxydihydrofuran liquefies and refluxes back into the purification vessel 1, while the remaining gas enters the fixed cylinder 6 through the connecting pipe 5 and is discharged through the L-shaped tube 7. Harmful substances in the gas are absorbed by the organic solvent. The gas discharged through the L-shaped tube 7 causes the organic solvent to begin rotating, allowing the organic solvent to... The gas is fully absorbed by the adsorption unit. The gas then enters the adsorption tank 151 through the outlet valve 11 and outlet pipe 14. The adsorption block 153 absorbs any remaining harmful substances in the gas. Finally, the gas is discharged through the fixed pipe 16 and vacuum pump 17. After vacuuming, the purification vessel 1 can be heated. The heated 2,5-dimethoxydihydrofuran enters the separation device 2 to separate from other impurities. The design of the adsorption component 15 and its connecting members ensures that harmful substances in the gas are fully absorbed during vacuuming, preventing them from harming the external environment. After a period of use, the device can be... Replace the adsorption block 153 by opening the baffle 154 and replace the organic solvent in the purification cylinder 8. When replacing the organic solvent, connect the discharge valve 13 to an external pump, start the pump and open the air inlet valve 9. At this time, the organic solvent is discharged through the discharge valve 13 and the pump, and the outside air enters the purification cylinder 8 through the air inlet cylinder 101. At this time, the filter screen 104 and the activated carbon block 102 can filter the air to prevent outside dust from entering the purification cylinder 8. After all the organic solvent is discharged, an organic solvent that can absorb 2,5-dimethoxydihydrofuran can be introduced back into the purification cylinder 8, and the device can be used normally.

[0029] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0030] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 2,5-dimethoxydihydrofuran purification and separation device, comprising a purification kettle (1) and a separation device (2) installed at the top end of the purification kettle (1), characterized in that: One side of the separation device (2) is provided with the vacuum pipe (3) fixedly connected to the top of the purification kettle (1) and penetrating the purification kettle (1), the top of the vacuum pipe (3) is fixedly connected with the inclined condensation reflux device (4), the top of the condensation reflux device (4) is fixedly connected with the connecting pipe (5), the bottom of the connecting pipe (5) is fixedly connected with the vertical fixed cylinder (6), the outer wall of the fixed cylinder (6) is fixedly connected with the L-shaped pipe (7), the outer side of the fixed cylinder (6) is provided with the vertical purification cylinder (8), the top of the purification cylinder (8) is fixedly connected with the air inlet valve (9), the top of the air inlet valve (9) is mounted with the air inlet filter assembly (10), one side of the air inlet valve (9) is provided with the air outlet valve (11) fixedly connected to the top of the purification cylinder (8), the bottom of the purification cylinder (8) is fixedly connected with the symmetrically arranged feed valve (12) and discharge valve (13), the top of the air outlet valve (11) is fixedly connected with the air outlet pipe (14), the end away from the air outlet valve (11) of the air outlet pipe (14) is mounted with the adsorption assembly (15), the bottom of the adsorption assembly (15) is fixedly connected with the fixed pipe (16), and the bottom of the fixed pipe (16) is fixedly connected with the vacuum pump (17).

2. The 2,5-dimethoxydihydrofuran purification and separation apparatus of claim 1, wherein: The L-shaped pipe (7) is provided with a plurality of L-shaped pipes (7) which are distributed as polar axes outside the fixed cylinder (6).

3. A 2,5-dimethoxydihydrofuran purification and separation apparatus according to claim 2, wherein: The fixed cylinder (6) is located at the bottom of the purification cylinder (8) inside, and the purification cylinder (8) is fixedly connected outside the connecting pipe (5).

4. The 2,5-dimethoxydihydrofuran purification and separation apparatus of claim 3, wherein: The air inlet filter assembly (10) comprises an air inlet cylinder (101) fixedly connected to the top of the air inlet valve (9), and the inner side of the air inlet cylinder (101) is provided with an activated carbon block (102).

5. A 2,5-dimethoxydihydrofuran purification and separation apparatus according to claim 4, wherein: The top of the activated carbon block (102) is provided with a threaded ring (103) which is screwed inside the air inlet cylinder (101), and the top of the threaded ring (103) is fixedly connected with a filter screen (104).

6. The 2,5-dimethoxydihydrofuran purification and separation apparatus of claim 1, wherein: The adsorption assembly (15) comprises an adsorption box (151) fixedly connected to the bottom of the air outlet pipe (14), the front side of the adsorption box (151) is fixedly connected with a sealing ring (152), the inner side of the adsorption box (151) is provided with an adsorption block (153), and the front side of the adsorption block (153) is provided with a baffle (154).

7. A 2,5-dimethoxydihydrofuran purification separation apparatus according to claim 6, wherein: The outer side of the adsorption block (153) is tightly attached to the inner side of the adsorption box (151), the front side of the sealing ring (152) is tightly attached to the rear side of the baffle (154), and the baffle (154) is mounted on the front side of the adsorption box (151).

Images