Improved solvent recovery tower

Abstract

The utility model relates to an improved solvent recovery tower which comprises a solvent filter cartridge, a plurality of condensing towers and a heating assembly, the solvent filter cartridge comprises a cartridge body and a filter assembly, the cartridge body is provided with an inner cavity, the filter assembly is installed in the inner cavity, the upper end of the inner cavity is provided with a liquid inlet pipe, and the liquid inlet pipe extends to the position above the filter end of the filter assembly. The filtering assembly is used for filtering solids in liquid, a first air outlet is formed in the upper portion of the barrel, the condensing towers and the first air outlet are communicated together through a pipeline, the heating assembly is used for heating the barrel, a mixed solvent is filtered through the filtering assembly when entering the barrel, and the residual solids are fixed in the filtering assembly. And then the heating assembly heats the cylinder body, and the corresponding condensing towers are opened according to the corresponding temperatures of the solvents, so that the evaporated gas enters the corresponding condensing towers to be condensed and liquefied.

Description

Technical Field

[0001] The utility model belongs to the technical field of recovery towers, and specifically relates to an improved solvent recovery tower. Background Art

[0002] Polyurethane is an important polymer material, and solvents are often needed in the preparation process. Commonly used polyurethane solvents include DME, NMP, THE, toluene, methyl chloride, etc. These solvents play the role of dissolving, promoting reaction, and adjusting molecular weight in the polyurethane synthesis process; these solvents need to be recovered after use, and are generally recovered by distillation. However, during the distillation process, due to some residual solids in the solvent, the presence of some solids will affect the distillation effect during distillation, and the solids are difficult to clean up after distillation. In view of this, this solution was created. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an improved solvent recovery tower, which can.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an improved solvent recovery tower, including a solvent filter cartridge, multiple condensation towers and a heating assembly, the solvent filter cartridge includes a barrel and a filter assembly, the barrel has an inner cavity, the filter assembly is installed in the inner cavity, the upper end of the inner cavity has a liquid inlet pipe, the liquid inlet pipe extends above the filter end of the filter assembly, the filter assembly is used to filter solids in the liquid, the top of the barrel has a first air outlet, the multiple condensation towers and the first air outlet are connected together through a pipeline, and the heating assembly is used to heat the barrel.

[0005] Furthermore, the filter assembly includes a centrifugal cylinder, which is located in the inner cavity. The lower axial end of the centrifugal cylinder extends into the bottom of the inner cavity and is rotatably connected. The side wall and the bottom of the centrifugal cylinder are formed with filter holes, and the side wall of the cylinder body forms an opening. A cover plate is provided at the opening, and the cover plate and the opening are sealed and connected.

[0006] Furthermore, the filter assembly includes a filter screen, a side wall of the cylinder forms a mounting groove, one end of the filter screen is connected to a sealing plate, the filter screen is inserted into the cylinder from the mounting groove, and the sealing plate is sealed and connected at the opening of the mounting groove.

[0007] Furthermore, the heating component includes a steam engine, a temperature control cavity is provided in the side wall of the cylinder, the temperature control cavity has an inlet and an outlet, and the output end of the steam engine is connected to the inlet.

[0008] Furthermore, a first solenoid valve is arranged between adjacent condensation towers, a connecting pipe is provided between the output end of the condensation tower and the pipeline, and a second solenoid valve is arranged on the connecting pipe.

[0009] Furthermore, an air intake fan is also provided in the connecting pipe, and the air intake fan is located below the second solenoid valve.

[0010] Furthermore, the recovery tower also includes a cylinder mounting frame, and the cylinder mounting frame includes two side frames, the two side frames are located on both sides of the cylinder, and the upper ends of the two side frames are connected by a connecting rod.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. In the utility model, when the mixed solvent enters the cylinder, it will be filtered through the filtering component to fix the residual solid in the filtering component, and then the heating component heats the cylinder. The corresponding condensation tower is opened according to the corresponding temperature of each solvent, so that the evaporated gas enters the corresponding condensation tower for condensation and liquefaction.

[0013] 2. The filtration component includes a centrifugal cylinder, and the residual solids are thrown to both sides of the centrifugal cylinder through the centrifugal rotation of the centrifugal cylinder. This arrangement will not affect the solvent passing through the centrifugal cylinder, and is also convenient for the subsequent collection and cleaning of the residual solids.

[0014] 3. The filter assembly includes a filter screen. When the solvent passes through the filter screen, the residual solids will be blocked above the filter screen, and a sealing plate is connected to one end of the filter screen. The filter screen and the sealing plate are detachably connected to the cylinder. The residual solids can be cleaned by regularly pulling out the filter screen to prevent blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic cross-sectional view of the structure of Embodiment 1 of the present utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the solvent filter cartridge in Example 1 of the utility model;

[0017] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 2 of the present utility model;

[0018] Figure 4 This is a schematic cross-sectional view of the solvent filter cartridge in Example 2 of the present utility model;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the solvent filter cartridge in the utility model.

[0020] Markings in the figure: 1. Cylinder mounting frame; 2. Solvent filter cylinder; 21. Temperature control chamber; 22. Centrifugal cylinder; 221. Filter hole; 23. Filter screen; 231. Mounting plate; 232. Screen body; 24. Liquid inlet pipe; 3. Condensation tower; 31. First solenoid valve; 32. Second solenoid valve; 33. Intake fan; 34. Pipeline; 4. Heating component; 41. Steam engine. DETAILED DESCRIPTION

[0021] In order to make the above features and advantages of the present invention more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0022] Example 1

[0023] like Figure 1 , 2 As shown in Figures 5 and 6, this embodiment provides an improved solvent recovery tower, including a cylinder mounting frame 1, a solvent filter cylinder 2, a plurality of condensation towers 3 and a heating component 4.

[0024] The solvent filter cartridge 2 comprises a cartridge body and a filter assembly, wherein the cartridge body has an inner cavity, a temperature control cavity 21 is provided in the side wall of the cartridge body, the temperature control cavity 21 has an inlet and an outlet, and a first air outlet is provided above the cartridge body. The cartridge mounting frame comprises two side frames, the two side frames are located on both sides of the cartridge body, and the upper ends of the two side frames are connected by a connecting rod.

[0025] The filter assembly is installed in the inner cavity, and the upper end of the inner cavity is provided with a liquid inlet pipe 24, and the liquid inlet pipe 24 extends to the top of the filter end of the filter assembly. The filter assembly is used to filter solids in the liquid. Specifically, the filter assembly includes a centrifugal cylinder 22, and the centrifugal cylinder 22 is located in the inner cavity. The lower end of the centrifugal cylinder 22 extends into the bottom of the inner cavity and is rotatably connected. The centrifugal cylinder 22 and the lower end of the shaft end are detachably connected. The side wall and the bottom of the centrifugal cylinder 22 are formed with filter holes 221, and the side wall of the cylinder body forms an opening. A cover plate is provided at the opening, and the cover plate and the opening are sealed. Through the centrifugal rotation of the centrifugal cylinder 22, the residual solids are thrown to both sides of the centrifugal cylinder 22. Such a setting will not affect the solvent passing through the centrifugal cylinder 22, and it is also convenient for the subsequent collection and cleaning of the residual solids. When it is necessary to clean the residual solids, open the cover plate, take out the centrifugal cylinder 22, and clean the residual solids inside. In this scheme, the height of the mixed solvent liquid does not exceed sixty percent of the height of the centrifugal cylinder 22.

[0026] Multiple condensation towers 3 and the first air outlet are connected together through a pipeline 34. Specifically, a first solenoid valve 31 is arranged between adjacent condensation towers 3, a connecting pipe is provided between the output end of the condensation tower 3 and the pipeline 34, a second solenoid valve 32 is provided on the connecting pipe, and an air intake fan 33 is also provided in the connecting pipe, and the air intake fan 33 is located below the second solenoid valve 32.

[0027] The heating assembly 4 is used to heat the cylinder. Specifically, the heating assembly 4 includes a steam engine 41, the output end of the steam engine 41 is connected to the inlet, and the heating efficiency is high by steam heating.

[0028] Working principle: the mixed solvent enters the inner cavity of the cylinder from the liquid inlet pipe 24 and is located above the centrifugal cylinder 22. The mixed solvent is discharged into the centrifugal cylinder 22, and the centrifugal cylinder 22 starts to rotate, and the residual solid is centrifugally thrown to the side wall of the centrifugal cylinder 22. The steam engine 41 rushes hot air into the temperature control chamber 21, so that the inner cavity is heated, and the solvent in this temperature range is evaporated. The second solenoid valve 32 on the corresponding condensation tower 3 is opened, and the adjacent and rear first solenoid valve 31 is closed, and the intake fan 33 is started to suck the gas into the condensation tower 3 for liquefaction and collection, and the steam temperature in the temperature control chamber 21 is increased in turn. The first solenoid valve 31, the second solenoid valve 32 and the intake fan 33 at the condensation tower 3 are opened and closed accordingly until all the solvent is recovered.

[0029] Example 2

[0030] like Figure 3-5 As shown, the difference between this embodiment and embodiment 1 is that the structure of the filter assembly is different. The filter assembly includes a filter screen 23. Specifically, the filter screen 23 includes a mounting plate 231 and a screen body 232. The mounting plate 231 has a mounting hole in the middle, and the screen body 232 is located at a lower position in the mounting hole. The thickness of the screen body 232 is lower than the thickness of the mounting hole. A mounting groove is formed on one side wall of the cylinder. A sealing plate is connected to one end of the filter screen 23. The filter screen 23 is inserted into the cylinder from the mounting groove. The sealing plate is sealed at the opening of the mounting groove. The filter screen 23 is fixed to the cylinder in a pull-out manner to facilitate cleaning of residual solids.

[0031] Working principle: the mixed solvent enters the inner cavity of the cylinder from the liquid inlet pipe 24 and is located above the filter 23. The mixed solvent is discharged onto the filter 23 for filtration, and the residual solids are filtered by the filter 23. The steam engine 41 rushes hot air into the temperature control chamber 21 to heat the inner cavity, and the solvent in this temperature range is evaporated. The corresponding second solenoid valve 32 on the condensation tower 3 is opened, and the adjacent and rear first solenoid valve 31 is closed, and the intake fan 33 is started to suck the gas into the condensation tower 3 for liquefaction and collection, and the steam temperature in the temperature control chamber 21 is increased in turn. The first solenoid valve 31, the second solenoid valve 32 and the intake fan 33 at the condensation tower 3 are opened and closed accordingly until all the solvent is recovered.

[0032] The above shows and describes the basic principles and main features of the invention and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the invention, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. An improved solvent recovery tower, characterized in that: It includes a solvent filter cartridge, multiple condensation towers and a heating component. The solvent filter cartridge includes a barrel and a filter component. The barrel has an inner cavity. The filter component is installed in the inner cavity. The upper end of the inner cavity has a liquid inlet pipe. The liquid inlet pipe extends above the filter end of the filter component. The filter component is used to filter solids in the liquid. The top of the barrel has a first air outlet. The multiple condensation towers and the first air outlet are connected together through pipelines. The heating component is used to heat the barrel.

2. The improved solvent recovery tower according to claim 1, characterized in that: The filter assembly includes a centrifugal cylinder, which is located in the inner cavity. The lower axial end of the centrifugal cylinder extends into the bottom of the inner cavity and is rotatably connected. The side wall and the bottom of the centrifugal cylinder are formed with filter holes, and the side wall of the cylinder body forms an opening. A cover plate is provided at the opening, and the cover plate and the opening are sealed.

3. The improved solvent recovery tower according to claim 1, characterized in that: The filter assembly includes a filter screen, a mounting groove is formed on one side wall of the cylinder, one end of the filter screen is connected to a sealing plate, the filter screen is inserted into the cylinder through the mounting groove, and the sealing plate is sealed and connected at the opening of the mounting groove.

4. The improved solvent recovery tower according to claim 1, characterized in that: The heating component comprises a steam engine. A temperature control cavity is provided in the side wall of the cylinder. The temperature control cavity has an inlet and an outlet. The output end of the steam engine is connected to the inlet.

5. The improved solvent recovery tower according to claim 1, characterized in that: A first solenoid valve is arranged between adjacent condensation towers, a connecting pipe is provided between the output end of the condensation tower and the pipeline, and a second solenoid valve is arranged on the connecting pipe.

6. The improved solvent recovery tower according to claim 5, characterized in that: An air intake fan is also arranged in the connecting pipe, and the air intake fan is located below the second solenoid valve.

7. The improved solvent recovery tower according to claim 1, characterized in that: The recovery tower also includes a cylinder mounting frame, and the cylinder mounting frame includes two side frames, the two side frames are located on both sides of the cylinder, and the upper ends of the two side frames are connected by a connecting rod.

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