Acetate solvent recycling system

Abstract

The utility model discloses an acetic ester solvent recycling system, relates to the field of acetic ester solvent recycling, and aims to solve the technical problems that in the prior art, an existing acetic ester solvent is generally recycled by a distillation tower after being used, but a filtering mechanism is not arranged at the front end of the existing distillation tower, so that the cost is low. The problem that the internal structure of the distillation tower is damaged by residual metal scraps in the solvent is solved. A plurality of supporting rods are arranged at the upper end of the interior of the filtering device at equal intervals in an array mode, an electromagnetic iron rod is arranged at the upper end of each supporting rod, bevel guide plates are fixedly connected to the front end and the rear end of the lower end of the interior of the filtering device, and the lower ends of the two bevel guide plates are jointly and fixedly connected with a semicircular filtering net; by arranging the electromagnetic iron rod, the semicircular filter screen and the conical filter screen, separation of metal impurities in a solvent is achieved, and the problem that equipment is damaged by metal scraps due to the fact that the front end of a traditional distillation tower is free of magnetic filtration is solved.

Description

Technical Field

[0001] This utility model relates to the field of acetate solvent recovery, specifically an acetate solvent recovery and reuse system. Background Technology

[0002] Acetate solvents are a class of organic solvents produced by the esterification reaction of acetic acid (acetic acid) with alcohols, mainly including ethyl acetate, butyl acetate, and propyl acetate. These solvents are characterized by strong solubility, moderate evaporation rate, and low toxicity, and are widely used in the coatings, inks, and adhesives industries. In coatings, they effectively dissolve resins and regulate drying time; in inks, they help disperse pigments and improve print quality; and in adhesives, they act as diluents, optimizing application performance. Furthermore, acetate solvents are also used in the pharmaceutical, cosmetic, and food industries, such as in drug extraction and fragrance formulation. Their low residue and environmentally friendly properties make them ideal substitutes for many traditional solvents, aligning with modern industry's pursuit of green chemistry.

[0003] For example, patent announcement number CN 105712873 B discloses a control method for the synthesis of ethyl acetate via esterification. The method includes the following steps: a) controlling the molar ratio of acetic acid to ethanol in a mixer to 1:1, and conveying the uniformly stirred mixture to an esterification tower; b) placing sulfuric acid at the bottom of the esterification tower, and only at the bottom of the esterification tower; c) heating the esterification reaction via an esterification reboiler to generate gaseous ethyl acetate and water; d) the gaseous ethyl acetate and water passing through an esterification condenser and an esterification cooler into an esterification phase separator to obtain ethyl acetate. This invention simplifies the existing ethyl acetate synthesis system by controlling the ratio of acetic acid and ethanol, the catalyst sulfuric acid, and the reaction temperature, thereby solving the technical problem of low ethyl acetate production rate in traditional processes. Simultaneously, it simplifies the subsequent separation system, reducing steam consumption by 50% and improving product production efficiency.

[0004] When acetate solvents are used and recycled, metal debris remains inside the solvent due to carbonization during the production process and corrosion inside tank trucks or pipelines. Currently, acetate solvents are usually recycled and reused using distillation towers. However, existing distillation towers do not have a filtration mechanism at the front end, which causes the metal debris remaining inside the solvent to damage the internal structure of the distillation tower. Therefore, there is an urgent need in the market to develop an acetate solvent recycling system to help people solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a system for the recovery and reuse of acetate solvents, in order to solve the problem mentioned in the background art that existing acetate solvents are usually recovered and reused using distillation columns, but the existing distillation columns do not have a filtration mechanism at the front end, which causes metal debris remaining inside the solvent to damage the internal structure of the distillation column.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an acetate solvent recovery and reuse system, comprising a filtration device. Multiple support rods are arranged in an equally spaced array at the upper end of the filtration device. Each support rod has an electromagnet rod at its upper end. Angle-bent guide plates are fixedly connected to both ends of the lower end of the filtration device. A semi-circular filter screen is fixedly connected to the lower ends of two angle-bent guide plates. A conical filter screen is fixedly connected to one side of the semi-circular filter screen. A spiral blade is rotatably connected inside the semi-circular filter screen. One side of the spiral blade extends into the conical filter screen and is fixedly connected to a conical spiral blade.

[0007] Preferably, the filter device has a liquid outlet at its lower end.

[0008] Preferably, each of the support rods is provided with a semi-circular support groove at its upper end, and the lower end of the electromagnet rod slides into the semi-circular support groove at the upper end of the support rod.

[0009] Preferably, one end of each electromagnet rod extends out of one side face of the filter device and is fixedly connected to a fixing member. Both ends of the fixing member are fixedly connected to wing plates, and the two wing plates are fixedly connected to the side face of the filter device by screws.

[0010] Preferably, the spiral blades and the conical spiral blades are fixedly connected to a rotating shaft in the middle, a slag discharge pipe is fixedly connected to the lower end of one side of the filter device, and a drive device is fixedly connected to the lower end of the other side of the filter device, with a drive motor fixedly installed inside the drive device.

[0011] Preferably, a support ring is fixedly connected to the middle of the slag discharge pipe, and one end of the rotating shaft extends into the slag discharge pipe and is inserted into the middle of the support ring.

[0012] Preferably, the other end of the rotating shaft extends into the drive device and is connected to the output end of the drive motor via a coupling.

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

[0014] (1) In this utility model, by setting up a magnetic filter layer composed of multiple electromagnet rod arrays, it can effectively adsorb magnetic metal impurities such as iron filings in the solvent, thus solving the problem of metal debris damaging the equipment due to the lack of magnetic filtration at the front end of the traditional distillation tower.

[0015] (2) In this utility model, a dual mechanical filtration structure of semi-circular filter screen and conical filter screen is adopted, combined with the automatic slag discharge design of spiral blades and conical spiral blades, which realizes efficient interception and automatic cleaning of non-magnetic metal particles, avoids the problem of filter screen clogging, and ensures continuous production.

[0016] (3) In this utility model, the electromagnet rod fixing structure with modular design allows the electromagnet rod to be quickly removed for cleaning and maintenance simply by unscrewing the screws, which greatly simplifies the equipment maintenance process. Attached Figure Description

[0017] Figure 1 This is a front view of the acetate solvent recovery and reuse system of this utility model.

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the present invention;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Filter device; 101. Support rod; 102. Semicircular support groove; 103. Angled guide plate; 104. Semicircular filter screen; 105. Conical filter screen; 106. Slag discharge pipe; 107. Support ring; 108. Liquid outlet; 2. Electromagnetic rod; 201. Fixing component; 202. Wing plate; 203. Screw; 3. Spiral blade; 301. Conical spiral blade; 302. Rotating shaft; 4. Drive device; 401. Drive motor. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of an acetate solvent recovery and reuse system, including a filter device 1. Multiple support rods 101 are arranged in an equally spaced array at the upper end of the filter device 1. Each support rod 101 has an electromagnet rod 2 at its upper end and a semi-circular support groove 102 at its upper end. The lower end of the electromagnet rod 2 slides into the semi-circular support groove 102 at the upper end of the support rod 101. One end of each electromagnet rod 2 extends out of one side of the filter device 1 and is fixedly connected to a fixing member 201. Both ends of the filter 201 are fixedly connected to wing plates 202. Both wing plates 202 are fixedly connected to the side end face of the filter device 1 by screws 203. When the acetate solvent recovery liquid is added from the top of the filter device 1, it first passes through the gap between multiple arrays of electromagnet rods 2. The multiple electromagnet rods 2 adsorb the magnetic metals such as iron filings in the solvent. By removing the screws 203, the electromagnet rods 2 can be pulled out from one side of the filter device 1 through the fixing part 201, which makes it easy to clean the magnetic metals adsorbed on the electromagnet rods 2.

[0024] Please see Figure 2 and Figure 3 Both ends of the lower part of the filter device 1 are fixedly connected to angled guide plates 103. A semi-circular filter screen 104 is fixedly connected to the lower ends of the two angled guide plates 103. A conical filter screen 105 is fixedly connected to one side of the semi-circular filter screen 104. A spiral blade 3 is rotatably connected inside the semi-circular filter screen 104. One side of the spiral blade 3 extends into the conical filter screen 105 and is fixedly connected to a conical spiral blade 301. A rotating shaft 302 is fixedly connected to the middle of the spiral blade 3 and the conical spiral blade 301. A slag discharge pipe 106 is fixedly connected to the lower end of one side of the filter device 1. A drive device 4 is fixedly connected to the lower end of the other side of the filter device 1. A drive motor 401 is fixedly installed inside the drive device 4. A support ring 107 is fixedly connected to the middle of the slag discharge pipe 106. One end of the rotating shaft 302 extends into the slag discharge pipe 106 and is inserted into... The rotating shaft 302 extends into the drive device 4 and is connected to the output of the drive motor 401 via a coupling. The acetate solvent recovery liquid falls through the gaps between multiple electromagnet rods 2 and flows into the semi-circular filter screen 104 through the angled guide plate 103. The semi-circular filter screen 104 filters the acetate solvent recovery liquid, blocking the non-magnetic metal in the acetate solvent recovery liquid. The drive motor 401 drives the spiral blade 3 and the conical spiral blade 301 to rotate synchronously, so that the spiral blade 3 and the conical spiral blade 301 drive the non-magnetic metal inside the semi-circular filter screen 104 to move through the conical filter screen 105 to the slag discharge pipe 106 and finally discharge from the slag discharge pipe 106. The filter device 1 is provided with a liquid outlet 108 at the lower end, and the filtered acetate solvent recovery liquid falls and is discharged through the liquid outlet 108.

[0025] Working Principle: During operation, the acetate solvent recovery solution containing metal fragments is injected from the top of the filter device 1. The solution first passes through a magnetic filter layer composed of multiple arrayed electromagnets 2. When energized, the electromagnets 2 generate a strong magnetic field, effectively adsorbing magnetic metal impurities such as iron filings in the solvent. The solution then flows through the angled guide plate 103 into the semi-circular filter screen 104, where non-magnetic metal particles are intercepted through the mesh. The drive motor 401 drives the spiral blades 3 and conical spiral blades 301 to rotate synchronously via the rotating shaft 302, pushing the solid impurities deposited on the filter screen towards the slag discharge pipe 106, where they are finally discharged. The filtered pure solvent, after double filtration through the semi-circular filter screen 104 and the conical filter screen 105, flows out from the outlet 108 into the subsequent distillation process. Periodically disconnecting the power and disassembling the fixing parts 201 of the electromagnets 2 allows for the removal of adsorbed magnetic impurities, achieving continuous and automated solvent purification and recovery.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A system for recovering and reusing acetic acid ester solvents, comprising a filtering device (1), characterized in that: The filter device (1) has multiple support rods (101) arranged in an evenly spaced array at the upper end. Each support rod (101) has an electromagnet rod (2) at its upper end. The filter device (1) has angled guide plates (103) fixedly connected to both ends at the lower end. The two angled guide plates (103) are fixedly connected to a semi-circular filter screen (104) at their lower ends. A conical filter screen (105) is fixedly connected to one side of the semi-circular filter screen (104). A spiral blade (3) is rotatably connected inside the semi-circular filter screen (104). One side of the spiral blade (3) extends into the conical filter screen (105) and is fixedly connected to a conical spiral blade (301).

2. The acetate solvent recycling system according to claim 1, characterized by: The filter device (1) is provided with a liquid outlet (108) at its lower end.

3. The acetate ester solvent recycling system according to claim 1, characterized by: Each of the support rods (101) has a semi-circular support groove (102) at its upper end, and the lower end of the electromagnet rod (2) slides into the semi-circular support groove (102) at the upper end of the support rod (101).

4. The acetate ester solvent recycling system according to claim 1, characterized by: Each of the electromagnet rods (2) extends out of one side of the filter device (1) and is fixedly connected to a fastener (201). Both ends of the fastener (201) are fixedly connected to wing plates (202). The two wing plates (202) are fixedly connected to the side of the filter device (1) by screws (203).

5. The acetate ester solvent recycling system according to claim 1, characterized by: The spiral blade (3) and the conical spiral blade (301) are fixedly connected to a rotating shaft (302) in the middle. A slag discharge pipe (106) is fixedly connected to the lower end of one side of the filter device (1). A drive device (4) is fixedly connected to the lower end of the other side of the filter device (1). A drive motor (401) is fixedly installed inside the drive device (4).

6. The acetate ester solvent recycling system according to claim 5, characterized by: A support ring (107) is fixedly connected to the middle of the slag discharge pipe (106), and one end of the rotating shaft (302) extends into the slag discharge pipe (106) and is inserted into the middle of the support ring (107).

7. The acetate solvent recovery and reuse system according to claim 6, characterized in that: The other end of the rotating shaft (302) extends into the drive device (4) and is connected to the output end of the drive motor (401) via a coupling.

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