Epoxy resin intermediate phase recovery system

Abstract

The utility model relates to an epoxy resin intermediate phase recovery system which comprises a split-phase kettle (1), a clear liquid tank (2), a saline water tank (3) and an aged resin drying machine (4), the input end of the split-phase kettle (1) is provided with an epoxy resin intermediate phase feed port and a solvent feed port, the output end of the split-phase kettle (1) is connected with a resin clear liquid conveying pipeline (5) and a liquid separation pipeline (6), the resin clear liquid conveying pipeline (5) is connected with the clear liquid tank (2), and the liquid separation pipeline (6) is connected with the clear liquid tank (2), the saline water tank (3) and the aged resin dryer (4). The system disclosed by the utility model can be used for separating aged resin and saline water while recovering resin clear liquid.

Description

Technical Field

[0001] This utility model relates to the field of epoxy resin mesophase recycling technology, and in particular to an epoxy resin mesophase recycling system. Background Technology

[0002] Epoxy resin is a bisphenol A diglycidyl ether produced by the reaction of epichlorohydrin and bisphenol A in the presence of liquid alkali. During the refining process of epoxy resin production, an epoxy resin mesophase is generated. The main components of the epoxy resin mesophase are resin slurry, aged resin, and brine. To improve resin yield and reduce material waste and aged resin solid waste, it is necessary to extract the resin slurry from the epoxy resin mesophase for reuse in the next batch of epoxy resin production; and simultaneously separate the aged resin and brine. Utility Model Content

[0003] The purpose of this invention is to provide an epoxy resin mesophase recovery system that can recover the resin clear liquid in the epoxy resin mesophase.

[0004] The objective of this utility model can be achieved through the following technical solution: an epoxy resin mesophase recovery system, comprising a phase separation vessel, a clear liquid tank, a brine tank, and an aging resin dryer;

[0005] The phase separation vessel has an epoxy resin mesophase feed port and a solvent feed port at its input end, and a resin clear liquid conveying pipe and a liquid separating pipe at its output end. The resin clear liquid conveying pipe is connected to the clear liquid tank, and the liquid separating pipe is connected to the clear liquid tank, the brine tank, and the aging resin dryer.

[0006] Preferably, the solvent inlet is a toluene inlet.

[0007] Preferably, the phase separation vessel is provided with an epoxy resin mesophase inlet and a solvent inlet at the top, an outlet at the bottom, and multiple resin clear liquid outlets at different heights on the side. The outlets are connected to a liquid separation pipe, and the resin clear liquid outlets are connected to a resin clear liquid conveying pipe.

[0008] More preferably, each resin clear liquid outlet is equipped with a liquid separating valve.

[0009] Preferably, the side of the phase separation vessel is provided with a liquid separation viewing window.

[0010] Preferably, the phase separation vessel is provided with an outer steam pipe.

[0011] Preferably, the phase separation vessel is a vertical phase separation vessel with a conical lower end cap at the bottom, which is connected to a liquid separation pipe.

[0012] Preferably, the liquid distribution pipeline includes an aged resin conveying pipeline, a brine conveying pipeline, and a resin clear liquid conveying branch pipe;

[0013] The aging resin conveying pipeline is connected to the aging resin dryer, the brine conveying pipeline is connected to the brine tank, and the resin clear liquid conveying branch pipe is connected to the clear liquid tank.

[0014] More preferably, the aging resin conveying pipe, the brine conveying pipe, and the resin clear liquid conveying branch pipe are all equipped with liquid distribution valves.

[0015] Preferably, the liquid distribution pipe is provided with a liquid distribution viewing window.

[0016] More preferably, the liquid distribution window is located on the main pipe of the liquid distribution pipeline.

[0017] In this invention, the material is separated into layers by gravity in the phase separation vessel. The material condition can be observed through the separation window, and the brine, aged resin, and resin clear liquid can be controlled to enter their respective pipes by opening and closing the separation valve.

[0018] Preferably, the liquid distribution pipe is a 304 or 316L stainless steel pipe. Preferably, the clear liquid tank is connected to a clear liquid output pipe, and a clear liquid delivery pump is installed on the clear liquid output pipe.

[0019] Preferably, the brine tank is connected to a brine output pipe, and a brine delivery pump is installed on the brine output pipe.

[0020] Preferably, the aging resin dryer is connected in sequence to a drying condenser and a drying condensate tank.

[0021] Preferably, the aging resin dryer is equipped with a steam jacket.

[0022] In this invention, the material is heated and evaporated in the dryer, and the resulting gas phase is condensed by the dryer condenser and enters the dryer condensate tank. The residual aged resin solid waste in the dryer is discharged after drying.

[0023] More preferably, the input end of the phase separation vessel is also provided with a drying condensate inlet, the drying condensate tank is connected to the drying condensate inlet through a drying condensate conveying pipe, and a drying condensate conveying pump is provided on the drying condensate conveying pipe.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This utility model can recover the resin clear liquid in the intermediate phase of epoxy resin and reuse it in the next batch of epoxy resin production, thereby improving the resin yield;

[0026] 2. This utility model effectively reduces the discharge of aged resin solid waste after recovering the resin clear liquid;

[0027] 3. This invention solves the problem of sticky aged resin after recovering the resin liquid;

[0028] 4. This invention separates aged resin and brine while recovering resin liquid, which is beneficial for the subsequent separate treatment of wastes with different properties.

[0029] 5. The solvent used in the epoxy resin mesophase recovery process of this utility model can be recycled through a drying condensate tank and a condensate transfer pump, thus saving solvent consumption. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the epoxy resin mesophase recovery system of this utility model;

[0031] Figure 2 This is a process flow diagram for the recovery of the epoxy resin mesophase according to this utility model.

[0032] In the diagram: 1-Separation vessel, 2-Clear liquid tank, 3-Brine tank, 4-Aging resin dryer, 5-Clear resin conveying pipeline, 6-Separation pipeline, 61-Aging resin conveying pipeline, 62-Brine conveying pipeline, 63-Clear resin conveying branch pipe, 7-Clear liquid output pipeline, 8-Clear liquid conveying pump, 9-Brine output pipeline, 10-Brine conveying pump, 11-Drying condenser, 12-Drying condensate tank, 13-Drying condensate conveying pipeline, 14-Drying condensate conveying pump, a-Separation valve, b-Separation window. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] Example 1

[0037] An epoxy resin mesophase recovery system, such as Figure 1 As shown, it includes a phase separation vessel 1, a clear liquid tank 2, a brine tank 3, an aging resin dryer 4, a resin clear liquid conveying pipeline 5, and a liquid separation pipeline 6.

[0038] The phase separation vessel 1 has an epoxy resin mesophase feed port and a solvent feed port at its input end, and its output end is connected to the clear liquid tank 2 through the resin clear liquid conveying pipe 5, and to the clear liquid tank 2, brine tank 3 and aging resin dryer 4 through the liquid separation pipe 6.

[0039] When using the system of this embodiment to recover the epoxy resin mesophase, the epoxy resin mesophase is fed into the phase separation vessel 1 through the epoxy resin mesophase inlet, and toluene is fed into the phase separation vessel 1 through the solvent inlet. The epoxy resin mesophase separates into layers in the phase separation vessel 1. The resin clear liquid is fed into the clear liquid tank 2 through the resin clear liquid conveying pipe 5. The brine and aged resin are fed into the brine tank 3 and the aged resin dryer 4 through the separating pipe 6, respectively.

[0040] Example 2

[0041] An epoxy resin mesophase recovery system is provided. The phase separation vessel 1 is provided with an epoxy resin mesophase inlet and a solvent inlet at the top, an outlet at the bottom, and multiple resin clear liquid outlets at different heights on the side. The bottom outlet is connected to a liquid separation pipe 6, and each resin clear liquid outlet on the side is provided with a liquid separation valve a and connected to a resin clear liquid conveying pipe 5.

[0042] Specifically, the main pipe of the separating pipe 6 is equipped with a separating window b. The main pipe is connected to an aging resin conveying pipe 61, a brine conveying pipe 62, and a resin clear liquid conveying branch pipe 63. The aging resin conveying pipe 61 is connected to the aging resin dryer 4 and is equipped with a separating valve a. The brine conveying pipe 62 is connected to the brine tank 3 and is equipped with a separating valve a. The resin clear liquid conveying branch pipe 63 is connected to the clear liquid tank 2 and is equipped with a separating valve a. The rest is the same as in Example 1.

[0043] When using the system of this embodiment to recover the epoxy resin mesophase, the epoxy resin mesophase is fed into the phase separation vessel 1 through the epoxy resin mesophase inlet, and toluene is fed into the phase separation vessel 1 through the solvent inlet. The epoxy resin mesophase separates into layers in the phase separation vessel 1. The resin clear liquid is fed into the clear liquid tank 2 through the resin clear liquid conveying pipe 5. The brine and aged resin enter the separation pipe 6. The brine is fed into the brine tank 3 through the brine conveying pipe 62. The aged resin is fed into the aged resin dryer 4 through the aged resin conveying pipe 61. The residual resin clear liquid is fed into the clear liquid tank 2 through the resin clear liquid conveying branch pipe 63.

[0044] Example 3

[0045] An epoxy resin mesophase recovery system is provided, wherein a separation window b is provided on the side of the phase separation vessel 1, and a steam outer half-pipe is provided on the phase separation vessel 1.

[0046] The clarified liquid tank 2 is connected to a clarified liquid output pipe 7, and a clarified liquid delivery pump 8 is installed on the clarified liquid output pipe 7. The brine tank 3 is connected to a brine output pipe 9, and a brine delivery pump 10 is installed on the brine output pipe 9. The aging resin dryer 4 is sequentially connected to a drying condenser 11 and a drying condensate tank 12. The drying condensate tank 12 is connected to the drying condensate inlet at the input end of the phase separation vessel 1 through a drying condensate delivery pipe 13, and a drying condensate delivery pump 14 is installed on the drying condensate delivery pipe 13. The rest is the same as in Example 2.

[0047] In this embodiment, the clear liquid in the clear liquid tank 2 can be reused for the production of the next batch of epoxy resin, the brine in the brine tank 3 can be transported to the brine treatment system, the aging resin dryer 4 dries the aging resin and discharges it as solid waste, and the drying condensate is temporarily stored in the drying condensate tank 12 and can be recycled.

[0048] Example 4

[0049] An apparatus and method for extracting and recovering resin supernatant from the mesophase of epoxy resin, and simultaneously separating and treating aged resin and brine. The specific technical solution is as follows:

[0050] I. The epoxy resin mesophase treatment device consists of a phase separation vessel 1, a dryer (aging resin dryer 4), a clear liquid tank 2, a brine tank 3, a drying condensate tank 12, a drying condenser 11, and a transfer pump. The above equipment is connected by pipelines.

[0051] II. A liquid separation viewing window is provided on the side of the phase separation vessel 1.

[0052] III. The phase separation vessel 1 is equipped with an outer steam pipe, a feed inlet at the top, a discharge outlet at the bottom, and multiple clear liquid outlets at different heights on the side.

[0053] IV. A separation viewing window b is provided on the liquid separation pipe 6 at the bottom of the phase separation vessel 1.

[0054] V. The phase separation vessel 1 adopts a batch-multiple extraction process to extract the resin clear liquid, which is then reused in the production of the next batch of epoxy resin.

[0055] VI. The brine discharged from the phase separation vessel 1 is collected and temporarily stored in the brine tank 3 and then transported to the brine treatment system.

[0056] VII. The aged resin discharged from the phase separation reactor 1 is dried by the dryer and discharged as solid waste; the dried condensate is temporarily stored in the dried condensate tank 12 and recycled.

[0057] The epoxy resin mesophase recovery process described in this embodiment includes two steps: phase separation and drying, as follows.

[0058] (1) Phase separation process

[0059] First phase separation: The epoxy resin mesophase and the first batch of toluene (or the circulating dried condensate) are fed into phase separation reactor 1. The mass ratio of toluene (or the circulating dried condensate) to the epoxy resin mesophase is 0.5–2. Phase separation reactor 1 is heated by the outer half-pipe, with the temperature controlled at 60–80°C, and operated at atmospheric pressure. The mixture is first stirred, then allowed to settle and separate. The separation is observed through the separation window b on the side of phase separation reactor 1. Based on the location of the separation interface, the clear liquid outlet valve on the side of phase separation reactor 1 is opened to discharge the clear resin liquid into clear liquid tank 2 for temporary storage and reuse in the next batch of epoxy resin production.

[0060] Second phase separation: The second batch of toluene (or the circulating dried condensate) is fed into phase separation reactor 1. The mass ratio of toluene (or the circulating dried condensate) to the epoxy resin mesophase is 0.5–2. Phase separation reactor 1 is heated by the outer half-pipe, with the temperature controlled at 60–80°C, and operated at atmospheric pressure. The mixture is first stirred, then allowed to settle and separate into layers. The separation is observed through the separation window b on the side of phase separation reactor 1. Based on the location of the separation interface, the clear liquid outlet valve on the side of phase separation reactor 1 is opened to discharge the resin clear liquid into clear liquid tank 2 for temporary storage and reuse in the production of the next batch of epoxy resin.

[0061] Third phase separation: The third batch of toluene (or the circulating dried condensate) is fed into phase separation vessel 1. The mass ratio of toluene (or the circulating dried condensate) to the epoxy resin intermediate phase is 0.5–2. Phase separation vessel 1 is heated by the outer half-pipe, with the temperature controlled at 60–80°C, and operated at atmospheric pressure. The mixture is first stirred, then allowed to stand for phase separation.

[0062] Separation is performed through the separating pipe 6 at the bottom of the phase separation vessel 1, first discharging brine, then aging resin, and finally resin clear liquid. The brine is collected and temporarily stored in the brine tank 3 and then transported to the brine treatment system; the aging resin enters the drying process; the resin clear liquid is temporarily stored in the clear liquid tank 2 and reused in the production of the next batch of epoxy resin.

[0063] (2) Drying process

[0064] The aged resin enters the dryer for evaporation and drying, and is discharged as solid waste. The evaporated gas phase is condensed by the condenser and temporarily stored in the drying condensate tank 12, and then recycled to the phase separation process.

[0065] The flow chart of the epoxy resin mesophase recycling process described in this embodiment is shown below. Figure 2 .

[0066] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. An epoxy resin mesophase recovery system, characterized in that, It includes a phase separation vessel (1), a clear liquid tank (2), a brine tank (3), and an aging resin dryer (4); The phase separation vessel (1) has an epoxy resin mesophase feed port and a solvent feed port at its input end, and a resin clear liquid conveying pipe (5) and a liquid separation pipe (6) at its output end. The resin clear liquid conveying pipe (5) is connected to the clear liquid tank (2), and the liquid separation pipe (6) is connected to the clear liquid tank (2), the brine tank (3), and the aging resin dryer (4).

2. The epoxy resin mesophase recovery system according to claim 1, characterized in that, The phase separation vessel (1) is provided with an epoxy resin mesophase inlet and a solvent inlet at the top, an outlet at the bottom, and multiple resin clear liquid outlets at different heights on the side. The outlet is connected to the liquid separation pipe (6), and the resin clear liquid outlet is connected to the resin clear liquid conveying pipe (5).

3. The epoxy resin mesophase recovery system according to claim 2, characterized in that, Each resin clear liquid outlet is equipped with a liquid separating valve (a).

4. The epoxy resin mesophase recovery system according to claim 1, characterized in that, The phase separation vessel (1) is provided with a liquid separation viewing window (b) on its side and a steam outer half-pipe on its top.

5. The epoxy resin mesophase recovery system according to claim 1, characterized in that, The liquid distribution pipeline (6) includes an aging resin conveying pipeline (61), a brine conveying pipeline (62), and a resin clear liquid conveying branch pipe (63); The aging resin conveying pipe (61) is connected to the aging resin dryer (4), the brine conveying pipe (62) is connected to the brine tank (3), and the resin clear liquid conveying branch pipe (63) is connected to the clear liquid tank (2).

6. The epoxy resin mesophase recovery system according to claim 5, characterized in that, The liquid distribution pipe (6) is provided with a liquid distribution viewing window (b); Each of the aging resin conveying pipe (61), brine conveying pipe (62), and resin clear liquid conveying branch pipe (63) is equipped with a liquid distribution valve (a).

7. The epoxy resin mesophase recovery system according to claim 1, characterized in that, The clear liquid tank (2) is connected to a clear liquid output pipe (7), and a clear liquid delivery pump (8) is provided on the clear liquid output pipe (7).

8. The epoxy resin mesophase recovery system according to claim 1, characterized in that, The brine tank (3) is connected to a brine output pipe (9), and a brine delivery pump (10) is installed on the brine output pipe (9).

9. The epoxy resin mesophase recovery system according to claim 1, characterized in that, The aging resin dryer (4) is connected in sequence to a drying condenser (11) and a drying condensate tank (12).

10. The epoxy resin mesophase recovery system according to claim 9, characterized in that, The input end of the phase separation vessel (1) is also provided with a dry condensate inlet. The dry condensate tank (12) is connected to the dry condensate inlet through a dry condensate conveying pipe (13). A dry condensate conveying pump (14) is provided on the dry condensate conveying pipe (13).

Images