CN217489775U - Vacuum system for devolatilization - Google Patents
Vacuum system for devolatilization Download PDFInfo
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- CN217489775U CN217489775U CN202221104104.3U CN202221104104U CN217489775U CN 217489775 U CN217489775 U CN 217489775U CN 202221104104 U CN202221104104 U CN 202221104104U CN 217489775 U CN217489775 U CN 217489775U
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Abstract
The utility model provides a vacuum system for take off and wave relates to chemical industry equipment technical field. The utility model discloses a vacuum system includes: the devolatilization device is provided with a material inlet, a material outlet and a volatile component outlet; the inlet of the condensing device is communicated with the volatile component outlet; the vacuum device comprises a vacuum fan, a liquid ring vacuum pump and a sealing liquid tank; the liquid ring vacuum pump is provided with a gas inlet, a liquid inlet and a mixed liquid outlet; the sealed liquid tank is provided with a mixed liquid inlet, a sealed liquid outlet and a tail gas outlet; the inlet of the vacuum fan is connected with the outlet of the condensing device, and the outlet of the vacuum fan is connected with the gas inlet; the mixed liquid outlet is connected with the mixed liquid inlet; the sealing liquid outlet is connected with the liquid inlet; the tail gas outlet is connected with a tail gas treatment device. The utility model discloses a vacuum system can increase and take off the air exhaust volume, reduces and remains monomer content, makes the product reach higher requirement for quality, improves product quality stability.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field especially relates to a vacuum system for taking off and wave.
Background
In the production of high molecular weight polymers, the process of removing volatiles from the bulk of the polymer is known as devolatilization. The devolatilization device is a device for removing small molecular substances in the polymer, and after the polymer is introduced into the devolatilization device, the surface area of the polymer is increased by utilizing the characteristic that different mediums of the polymer have different boiling points, and different components of the polymer are gasified and separated. The vacuum system is adopted for devolatilization, so that the residual monomer content in the devolatilized and separated product is lower, and the product quality is better.
In traditional devolatilization system, the devolatilizer is equipped with a condenser and a vacuum fan, the condenser is used for condensing volatile components, the vacuum fan is used for providing vacuum environment, but the vacuum degree that can provide is not enough, residual monomer content in devolatilized products is on the high side, resulting in unstable product quality.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to provide a vacuum system for devolatilization, which can increase the amount of air extracted from devolatilization, reduce the content of residual monomers, achieve higher quality requirements of products, and improve the stability of product quality.
A vacuum system for devolatilization comprising:
the devolatilization device is provided with a material inlet, a material outlet and a volatile component outlet;
the inlet of the condensing device is communicated with the volatile component outlet; and
the vacuum device comprises a vacuum fan, a liquid ring vacuum pump and a sealing liquid tank; the liquid ring vacuum pump is provided with a gas inlet, a liquid inlet and a mixed liquid outlet; the sealed liquid tank is provided with a mixed liquid inlet, a sealed liquid outlet and a tail gas outlet; an inlet of the vacuum fan is connected with an outlet of the condensing device, and an outlet of the vacuum fan is connected with the gas inlet; the mixed liquid outlet is connected with the mixed liquid inlet; the sealing liquid outlet is connected with the liquid inlet; and the tail gas outlet is connected with a tail gas treatment device.
Among the above-mentioned vacuum system, vacuum device is bigger including the vacuum fan and the liquid ring vacuum pump of establishing ties, compares in the vacuum that traditional single vacuum fan can produce, and the air exhaust volume greatly increased can take away the volatile in the devolatilization device as far as possible, reduces the content of residual monomer in the polymer, improves the quality and the stability of product.
In one embodiment, the devolatilization device comprises a first devolatilizer and a second devolatilizer which are connected with each other through materials, and the volatile component outlets are arranged at the upper ends of the first devolatilizer and the second devolatilizer. The two devolatilization devices connected in series can further improve the devolatilization efficiency.
In one embodiment, a vacuum booster fan is arranged on a pipeline between the second devolatilizer and the condensing device. Generally speaking, to improve the devolatilization effect, the second devolatilizer has a higher vacuum degree than the first devolatilizer, and the vacuum degree in the second devolatilizer can be improved by providing a vacuum booster fan.
In one embodiment, the condensing device comprises a first condenser and a second condenser connected in series, the first condenser is connected with the devolatilization device, and the second condenser is connected with the vacuum device. Two condensers connected in series are arranged, so that the condensation effect is further improved.
In one embodiment, the vacuum device further comprises a cooler, one end of the cooler is connected with the sealing liquid outlet of the sealing liquid tank, and the other end of the cooler is connected with the liquid inlet of the liquid ring vacuum pump.
The lower the working temperature of the sealing liquid, the larger the vacuum degree which can be generated by the liquid ring vacuum pump, so that the cooler is arranged to cool the sealing liquid, and the vacuum effect of the whole system can be further improved.
In one embodiment, the sealing liquid tank is further provided with a liquid supplementing port for supplementing sealing liquid.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a vacuum system for taking off and waving, vacuum apparatus are bigger including the vacuum fan and the liquid ring vacuum pump of establishing ties in the vacuum that traditional single vacuum fan can produce, and the extraction air volume greatly increased can take away the volatile in taking off and waving the device as far as possible, reduces the residual monomeric content in the polymer, improves the quality and the stability of product.
Drawings
Fig. 1 is a schematic structural view of a conventional devolatilization system.
Wherein, 1, devolatilization device, 2, condenser, 3, vacuum blower.
FIG. 2 is a schematic structural view of a devolatilization system in an example.
The system comprises a first devolatilizer, a second devolatilizer, a vacuum booster fan, a first condenser, a second condenser, a vacuum pump, a liquid ring vacuum pump, a sealing liquid tank, a cooling device and a cooling device, wherein the first devolatilizer is 100, the second devolatilizer is 200, the second devolatilizer is 300, the vacuum booster fan is 400, the first condenser is 500, the second condenser is 600, the vacuum fan is 700, the liquid ring vacuum pump is 800, the sealing liquid tank is 900 and the cooling device is used.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
A vacuum system for devolatilization, as shown in FIG. 2, comprises a devolatilization device for separating volatile substances such as residual monomers from a product, a condensing device for condensing the volatile substances, and a vacuum device for generating vacuum to draw out the volatile substances from the devolatilization device and the condensing device.
In this embodiment, the devolatilization apparatus comprises a first devolatilizer 100 and a second devolatilizer 200 which are connected in series by materials, wherein a material outlet of the first devolatilizer 100 is connected to a material inlet of the second devolatilizer 200, and the materials are subjected to a first devolatilization and a second devolatilization in the first devolatilizer 100 and the second devolatilizer 200, respectively, and the devolatilization efficiency can be improved by performing the two devolatilizations. The upper ends of the first devolatilizer 100 and the second devolatilizer 200 are both provided with volatile outlets for discharging volatile gas. Generally speaking, the required vacuum degree of devolatilization for the second time is bigger than the required vacuum degree of devolatilization for the first time to reach better impurity removal effect, therefore, in order to guarantee the vacuum degree of the second devolatilization device 200, the vacuum booster fan 300 is arranged on the pipeline between the second devolatilization device 200 and the condensing device, and the vacuum degree in the second devolatilization device 200 is improved.
The condensing equipment includes first condenser 400 and second condenser 500 of establishing ties, and first condenser 400 with take off and wave the device and be connected, and second condenser 500 is connected with vacuum apparatus, sets up the condenser of two series connections and can further improve condensation effect. It can be understood that the condensing device needs to be introduced with a cooling medium to condense volatile components during operation. After condensation, part of volatile matters with lower liquefaction temperature are condensed into liquid state and can be directly discharged for recovery treatment, and the residual volatile matters enter a vacuum device.
The vacuum device of this embodiment includes a vacuum blower 600, a liquid ring vacuum pump 700, and a sealing liquid tank 800, which are connected in sequence. An inlet of the vacuum fan 600 is connected to an outlet of the second condenser 500, and an exhaust gas outlet of the seal liquid tank 800 is connected to an exhaust gas treatment device (not shown).
The liquid ring vacuum pump 700 is provided with a gas inlet, a liquid inlet and a mixed liquid outlet. The outlet of the vacuum fan 600 is connected with the gas inlet of the liquid ring vacuum pump 700, and the gas inlet is used for introducing volatile components. The liquid inlet is used for introducing sealing liquid, and the introduction of the sealing liquid is required for the operation of the liquid ring vacuum pump 700. The mixed liquid outlet is used for discharging the mixture of volatile components and the sealing liquid. .
The upper end of the sealing liquid tank 800 is provided with a mixed liquid inlet and a tail gas outlet, and the lower end is provided with a sealing liquid outlet. The mixed liquid inlet of the sealed liquid tank 800 is connected with the mixed liquid outlet of the liquid ring vacuum pump 700, and the mixture of the sealed liquid and the volatile component discharged from the liquid ring vacuum pump 700 is led into the sealed liquid tank 800. The tail gas outlet is connected with a tail gas treatment device, and the tail gas is guided into the tail gas treatment device and is discharged after being treated to be qualified. The sealing liquid outlet is communicated with the liquid inlet of the liquid ring vacuum pump 700, and the sealing liquid in the sealing liquid tank 800 is introduced into the liquid ring vacuum pump 700. The sealing liquid tank 800 is further provided with a liquid supplementing port, and the liquid supplementing port is used for supplementing sealing liquid in the sealing liquid tank 800.
The lower the operating temperature of the sealing liquid, the greater the degree of vacuum that the liquid ring vacuum pump 700 can generate, and therefore the present embodiment is further provided with a cooler 900 for cooling the sealing liquid. Specifically, one end of the cooler 900 is connected to a sealing liquid outlet of the sealing liquid tank 800, and the other end is connected to a liquid inlet of the liquid ring vacuum pump 700, so that the temperature of the sealing liquid passing through the cooler 900 is reduced, and the sealing liquid enters the liquid ring vacuum pump 700. Cooler 900 may alternatively be a shell and tube heat exchanger or a jacketed heat exchanger.
The following is a working example of the vacuum system of the present embodiment:
the valves on the respective connecting lines are opened and the vacuum apparatus is operated for a period of time to bring the pressure in the first devolatilizer 100 to 3kPa and the pressure in the second devolatilizer 200 to near full vacuum. The volatile components in the first devolatilizer 100 and the second devolatilizer 200 are pumped out and introduced into a condensing unit. The cooling medium of the first condenser 400 is cooling water with the temperature of 25-30 ℃, and the cooling medium of the second condenser 500 is chilled water with the temperature of 4-10 ℃, so that most of substances in volatile matters can be condensed. The volatile components which are not condensed into liquid state enter a vacuum device and then enter a tail gas treatment device to be treated. The sealing liquid tank 800 stores sealing liquid, the sealing liquid enters the cooler 900, a cooling medium of the cooler 900 is chilled water at 4-10 ℃, and the low-temperature sealing liquid enters the liquid ring vacuum pump 700 to generate a larger vacuum degree.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. A vacuum system for devolatilization comprising:
the devolatilization device is provided with a material inlet, a material outlet and a volatile component outlet;
the inlet of the condensing device is communicated with the volatile component outlet; and
the vacuum device comprises a vacuum fan, a liquid ring vacuum pump and a sealing liquid tank; the liquid ring vacuum pump is provided with a gas inlet, a liquid inlet and a mixed liquid outlet; the sealing liquid tank is provided with a mixed liquid inlet, a sealing liquid outlet and a tail gas outlet; an inlet of the vacuum fan is connected with an outlet of the condensing device, and an outlet of the vacuum fan is connected with the gas inlet; the mixed liquid outlet is connected with the mixed liquid inlet; the sealing liquid outlet is connected with the liquid inlet; and the tail gas outlet is connected with a tail gas treatment device.
2. The vacuum system of claim 1, wherein said devolatilization apparatus comprises a first devolatilizer and a second devolatilizer connected to a material, and said volatile component outlets are disposed at upper ends of said first devolatilizer and said second devolatilizer.
3. The vacuum system of claim 2, wherein a vacuum booster fan is disposed on the conduit between the second devolatilizer and the condensing unit.
4. The vacuum system of claim 1, wherein said condensing means comprises a first condenser and a second condenser connected in series, said first condenser being connected to said devolatilizer device, said second condenser being connected to said vacuum device.
5. The vacuum system of claim 1, wherein the vacuum apparatus further comprises a cooler, one end of the cooler is connected with the sealing liquid outlet of the sealing liquid tank, and the other end of the cooler is connected with the liquid inlet of the liquid ring vacuum pump.
6. The vacuum system according to any one of claims 1 to 5, wherein the sealing liquid tank is further provided with a liquid supplementing port for supplementing sealing liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104104.3U CN217489775U (en) | 2022-05-09 | 2022-05-09 | Vacuum system for devolatilization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221104104.3U CN217489775U (en) | 2022-05-09 | 2022-05-09 | Vacuum system for devolatilization |
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| CN217489775U true CN217489775U (en) | 2022-09-27 |
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| CN202221104104.3U Active CN217489775U (en) | 2022-05-09 | 2022-05-09 | Vacuum system for devolatilization |
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