CN213947389U - Extruder vacuumizing device for polycarbonate production - Google Patents
Extruder vacuumizing device for polycarbonate production Download PDFInfo
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- CN213947389U CN213947389U CN202022780098.0U CN202022780098U CN213947389U CN 213947389 U CN213947389 U CN 213947389U CN 202022780098 U CN202022780098 U CN 202022780098U CN 213947389 U CN213947389 U CN 213947389U
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- heat exchanger
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- separation tank
- vacuum pump
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Abstract
The utility model discloses an extruder vacuumizing device used in polycarbonate production, which comprises a gas extruder (1), an ejector (2), a condenser (3), a liquid ring vacuum pump (4), a heat exchanger (5) and a gas-liquid separation tank (6); the gas extruder (1), the ejector (2), the condenser (3), the liquid ring vacuum pump (4) and the gas-liquid separation tank (6) are sequentially connected; the gas-liquid separation tank (6) is connected with a heat exchanger (5), and the heat exchanger (5) is connected with a liquid ring vacuum pump (4). The utility model carries out a certain degree of thermal cleaning to the heat exchanger after the steam enters the heat exchanger, thus solving the problem that the residual monomer is accumulated in the heat exchanger pipeline; meanwhile, the pressure of low-pressure steam is also higher, so that the vacuumizing effect of the ejector is increased, and the pressure requirement of the liquid ring vacuum pump can be met by removing the fan.
Description
Technical Field
The utility model relates to an extruder evacuating device, concretely relates to extruder evacuating device for in the polycarbonate production.
Background
In a polycarbonate production plant, depending on the application, different grades need to be produced, which requires the use of different additives. Mixing the additive and the polycarbonate melt in an extruder, wherein a part of monomer residues of the additive are inevitably generated in the mixing process, and the quality of the polycarbonate product is influenced; in order to ensure the product quality, residual monomers and water vapor of additives in materials need to be removed, and therefore, a vacuum-pumping system is designed above the extruder;
as shown in fig. 1, the extruder vacuumizing device comprises a gas extruder 21, a condenser 12, a fan 13, an ejector 14, a liquid ring vacuum pump 15, a heat exchanger 16 and a gas-liquid separation tank 17; the gas extruder 11, the condenser 12, the fan 13, the ejector 14, the liquid ring vacuum pump 15 and the gas-liquid separation tank 17 are sequentially connected; the gas-liquid separation tank 17 is connected with a heat exchanger 16, the heat exchanger 16 is connected with a liquid ring vacuum pump 15, and the upper part of the gas-liquid separation tank 17 is connected with the upper part of the ejector 14; a cooling medium 18 is arranged on one side below the condenser 12, and a condensate outlet 19 is arranged on the other side below the condenser 12; a tail gas outlet 20 is arranged above the gas-liquid separation tank 17, and a waste liquid outlet 22 is arranged below the gas-liquid separation tank 6;
the water vapor carries residual monomers to enter a separation tank, one part of the water vapor is condensed in the separation tank, the other part of the water vapor enters a heat exchanger to be condensed with water at 85 ℃, and the condensed liquid is discharged from the bottom of the heat exchanger; the low-boiling-point non-condensable gas enters a subsequent fan and a liquid ring vacuum system with an ejector so as to meet the vacuum requirement; an ejector is adopted at the inlet of the liquid ring vacuum system, so that a liquid ring pump can work under lower pressure, and the motive gas of the ejector is the gas of a separation tank behind a vacuum pump;
in the heat exchanger, condensed additives participate in monomers and the like and are easily accumulated on the pipe wall of the heat exchanger, so that the efficiency of the heat exchanger is reduced, and the operation of a fan and a liquid ring vacuum system of the heat exchanger is threatened.
Disclosure of Invention
The technical problem to be solved by the utility model is to carry out a certain degree of thermal cleaning on the heat exchanger after the steam enters the heat exchanger, thus solving the problem that the residual monomer is accumulated on the heat exchanger pipeline; meanwhile, the pressure of low-pressure steam is also higher, so that the vacuumizing effect of the ejector is increased, and the pressure requirement of the liquid ring vacuum pump can be met by removing the fan.
The utility model discloses an extruder evacuating device for in polycarbonate production realizes through following technical scheme: comprises a gas extruder, an ejector, a condenser, a liquid ring vacuum pump, a heat exchanger and a gas-liquid separation tank;
the gas extruder, the ejector, the condenser, the liquid ring vacuum pump and the gas-liquid separation tank are sequentially connected; the gas-liquid separation tank is connected with a heat exchanger, and the heat exchanger is connected with a liquid ring vacuum pump.
According to the preferable technical scheme, medium-pressure steam is arranged above the ejector, a cooling medium is arranged on one side below the condenser, and a condensate outlet is arranged on the other side below the condenser; a tail gas outlet is arranged above the gas-liquid separation tank, and a waste liquid outlet is arranged below the gas-liquid separation tank.
As a preferred technical scheme, a gas extruder, an ejector, a condenser, a liquid ring vacuum pump and a gas-liquid separation tank are sequentially connected through pipelines; the gas-liquid separation tank and the heat exchanger, and the heat exchanger and the liquid ring vacuum pump are also connected through pipelines.
The utility model has the advantages that: the utility model carries out a certain degree of thermal cleaning to the heat exchanger after the steam enters the heat exchanger, thus solving the problem that the residual monomer is accumulated in the heat exchanger pipeline; meanwhile, the pressure of low-pressure steam is also higher, so that the vacuumizing effect of the ejector is increased, and the pressure requirement of the liquid ring vacuum pump can be met by removing the fan.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a connection structure of a vacuum extractor of a conventional extruder;
fig. 2 is a schematic view of the connection structure of the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "the outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms herein such as "upper," "above," "lower," "below," and the like in describing relative spatial positions is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "set", "coupled", "connected", "penetrating", "plugging", and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 2, the extruder vacuum pumping device for polycarbonate production of the present invention comprises a gas extruder 1, an ejector 2, a condenser 3, a liquid ring vacuum pump 4, a heat exchanger 5 and a gas-liquid separation tank 6;
the gas extruder 1, the ejector 2, the condenser 3, the liquid ring vacuum pump 4 and the gas-liquid separation tank 6 are sequentially connected; the gas-liquid separation tank 6 is connected with a heat exchanger 5, and the heat exchanger 5 is connected with a liquid ring vacuum pump 4.
In the embodiment, medium-pressure steam 7 is arranged above the ejector 2, and the steam enters the heat exchanger 5 and then carries out heat cleaning on the heat exchanger 5 to a certain extent, so that the problem that residual monomers are accumulated in a heat exchanger pipeline is solved; because the pressure of the low-pressure steam is higher, the vacuum pumping effect of the ejector 2 is increased, and the pressure requirement that the blower is removed and the liquid ring vacuum pump 4 can be met is met; a cooling medium 8 is arranged on one side below the condenser 3, and a condensate outlet 9 is arranged on the other side below the condenser 3; a tail gas outlet 10 is arranged above the gas-liquid separation tank 6, and a waste liquid outlet 11 is arranged below the gas-liquid separation tank 6.
In addition, the gas extruder 1, the ejector 2, the condenser 3, the liquid ring vacuum pump 4 and the gas-liquid separation tank 6 are sequentially connected through pipelines; the gas-liquid separation tank 6 is connected with the heat exchanger 5, and the heat exchanger 5 is also connected with the liquid ring vacuum pump 4 through pipelines.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (3)
1. An extruder evacuating device for polycarbonate production is characterized in that: comprises a gas extruder (1), an ejector (2), a condenser (3), a liquid ring vacuum pump (4), a heat exchanger (5) and a gas-liquid separation tank (6);
the gas extruder (1), the ejector (2), the condenser (3), the liquid ring vacuum pump (4) and the gas-liquid separation tank (6) are sequentially connected; the gas-liquid separation tank (6) is connected with a heat exchanger (5), and the heat exchanger (5) is connected with a liquid ring vacuum pump (4).
2. The extruder vacuum extractor for use in the production of polycarbonate of claim 1, wherein: medium-pressure steam (7) is arranged above the ejector (2), a cooling medium (8) is arranged on one side below the condenser (3), and a condensate outlet (9) is arranged on the other side below the condenser (3); a tail gas outlet (10) is arranged above the gas-liquid separation tank (6), and a waste liquid outlet is arranged below the gas-liquid separation tank (6).
3. The extruder vacuum extractor for use in the production of polycarbonate of claim 1, wherein: the gas extruder (1), the ejector (2), the condenser (3), the liquid ring vacuum pump (4) and the gas-liquid separation tank (6) are sequentially connected through pipelines; the gas-liquid separation tank (6) is connected with the heat exchanger (5), and the heat exchanger (5) is also connected with the liquid ring vacuum pump (4) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022780098.0U CN213947389U (en) | 2020-11-25 | 2020-11-25 | Extruder vacuumizing device for polycarbonate production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022780098.0U CN213947389U (en) | 2020-11-25 | 2020-11-25 | Extruder vacuumizing device for polycarbonate production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213947389U true CN213947389U (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022780098.0U Active CN213947389U (en) | 2020-11-25 | 2020-11-25 | Extruder vacuumizing device for polycarbonate production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213947389U (en) |
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2020
- 2020-11-25 CN CN202022780098.0U patent/CN213947389U/en active Active
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