CN111035968A - Film type continuous degassing system - Google Patents
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- CN111035968A CN111035968A CN201911409560.1A CN201911409560A CN111035968A CN 111035968 A CN111035968 A CN 111035968A CN 201911409560 A CN201911409560 A CN 201911409560A CN 111035968 A CN111035968 A CN 111035968A
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- 238000007872 degassing Methods 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 39
- 239000007789 gas Substances 0.000 description 22
- 239000000126 substance Substances 0.000 description 18
- 239000000047 product Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 150000004996 alkyl benzenes Chemical class 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 150000002191 fatty alcohols Chemical class 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000006277 sulfonation reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- -1 alkylbenzene sulfonate Chemical class 0.000 description 1
- 229940092714 benzenesulfonic acid Drugs 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a film type continuous degassing system which comprises a degasser, a slurry preheater and a gas lift air heater. Based on the degassing method, the invention also provides a degassing method based on the degassing system. The efficient film type continuous degassing system can realize continuous operation, has the advantages of stable system, good removal effect, low operation cost, low energy consumption, no pollution in the whole degassing process, unlimited recycling of hot water for heat preservation and the like.
Description
Technical Field
The invention relates to the field of surfactant processing, in particular to a high-efficiency film type continuous degassing system used in a surfactant production process and a degassing method using the same.
Background
With the progress of society, people increasingly demand the performance of various products, and pay more attention to the safety of the products. This requires that we improve the performance of the product in industrial production, and reduce the toxicity of the product itself and the residual amount of harmful substances. Surfactants (e.g., anionic surfactants) used in the daily chemical and industrial industries carry trace amounts of by-product harmful substances during the production process, the trace amounts of harmful substances affect the quality and use requirements of downstream products, such as acid gas in heavy alkylbenzene sulfonic acid, some trace amounts of harmful substances cause harm to human bodies, such as dioxane in fatty alcohol polyoxyethylene ether sulfate (AES), and are internationally recognized carcinogenic substances. It must be removed below safe limits during the production process.
In the current industrial production, the traditional method for removing acid gas in heavy alkylbenzene sulfonic acid adopts a water washing or gas back blowing mode, namely, materials are put into a storage tank, inert gas is blown in from the bottom of the storage tank, and harmful substances in the materials are taken away in a bubbling mode; or adding water into the storage tank to react with sulfur oxides in the materials to form sulfuric acid dissolved in the water, and separating a sulfuric acid-containing water layer from the materials after layering. The removal efficiency of the removal mode is only 30-40%, the energy consumption is high, secondary pollution and a large amount of acidic wastewater can be generated, and continuous stable operation cannot be realized. The dioxane in the fatty alcohol polyoxyethylene ether sulfate (AES) is removed mainly by adopting conventional film scraping removal and flash evaporation removal modes. The working principle of the conventional scraping and removing is that liquid is forcedly formed into a film through a scraping film sheet rotating at a high speed, the film flows at a high speed, and harmful substances carried in materials are removed under a vacuum condition; the working principle of the flash evaporation degasser is that under a vacuum state, high-temperature materials enter the flash evaporation degasser, the moisture in the materials is removed and harmful substances carried in the materials are taken away by utilizing the flash evaporation principle, the conventional film scraping removal mode has poor effect, and the flash evaporation removal mode has smaller application range.
Therefore, aiming at a large-scale industrial production device, how to develop a high-efficiency, energy-saving, continuous and stable harmful substance removal mode through improving production technical links such as equipment, process and the like has important significance for actual production.
Disclosure of Invention
In view of the above problems, the present invention provides a novel and efficient membrane type continuous degassing system and a degassing method using the same.
In order to achieve the purpose, the invention provides the following technical scheme:
a novel high-efficiency film type continuous degassing system comprises a film type continuous degasser, a slurry preheater and a gas stripping air heater. The slurry preheater is used for keeping/heating the slurry entering the deaerator at a certain temperature all the time, and the slurry enters the thin film type continuous deaerator in an optimal flowing state, and hot water can be used as a heat medium introduced into the slurry preheater. The air stripping air heater is used for keeping/heating air stripping air entering the deaerator at a proper temperature, the heated air stripping air enters the deaerator from an air inlet in the upper part of the cylinder body, the influence on the temperature of slurry in the deaerator is reduced, and a heat medium introduced into the air stripping air heater can be low-pressure steam or other heat sources. The action principle of the degassing system is as follows: the slurry and the stripping air are heated by a slurry preheater and a stripping air heater respectively and then enter a film type continuous degasser simultaneously, the slurry is in a film shape under the action of mechanical rolling, bubbles are broken under the action of a multilayer scraper of the degasser, harmful substances escape, and the escaping harmful substances can be quickly taken away by the stripping air.
Specifically, the degasser comprises a cylinder, a transmission device, a film forming device and a heat preservation device.
Wherein, the upper part of the cylinder body is provided with a feed inlet and an air inlet which are used for the entry of heated slurry and air stripping air; the lower part is provided with a discharge hole and an air outlet. Wherein, the discharge hole can be provided with a structure comprising an inner cone and an outer cone which respectively gradually reduce in diameter downwards along the wall of the cylinder. The lower opening of the inner cone is higher than that of the outer cone. The air outlet is arranged on the outer cone and is higher than the lower opening of the inner cone.
The preheated slurry enters the inner wall of the cylinder body from the feed inlet along the tangential direction, so that a film forming mechanism in an initial state is ensured, and a foundation is laid for subsequent removal efficiency.
The film forming device is arranged in the cylinder (preferably at the middle section position), is matched with the cylinder in shape, and forms a slurry thin layer with required thickness on the inner wall of the cylinder through relative movement between the film forming device and the cylinder.
Further, the film forming apparatus includes a rotor and a multilayer blade. The rotor is of a hollow cylinder structure (the upper surface and the lower surface of the cylinder are closed, but the cylinder is hollow, so that stripping air is forced to pass through a slit formed between the rotor and the cylinder to increase the wind speed), and the scrapers are uniformly and alternately arranged on the outer wall of the cylinder of the rotor. Preferably, the outer diameter of the rotor is 0.3 to 0.95 times the inner diameter of the cylinder. The increase of the diameter of the rotor of the deaerator can reduce the flow cross section of a slit (air stripping air channel) formed between the rotor and the inner wall of the cylinder, improve the flow velocity of air stripping air in the channel, improve the air stripping effect, reduce the consumption of air stripping air and reduce the production cost. Each layer of scraper is uniformly distributed on the circumference of the rotor, and the layers of scrapers are staggered in the axial direction of the rotor.
The film forming device also comprises a transmission shaft connected to the transmission device, and the transmission device is used for driving the film forming device to move relative to the cylinder body.
The heat preservation device wraps the barrel and is used for controlling the temperature in the barrel (particularly the temperature of slurry in the barrel).
The heat preservation device can comprise one section or a plurality of sections of heat preservation jackets, and each section of the heat preservation jacket comprises a water inlet and a water outlet.
The gas stripping air enters from the top of the deaerator, is uniformly distributed and blows from top to bottom, and is discharged from a gas stripping air outlet at the lower part of the deaerator to take away harmful substances in the slurry. The temperature and flow rate of the stripping air are controllable (the flow rate is increased through the air inlet, and/or the air outlet is vacuumized, etc.). The stripping air is dry gas, and can be air or inert gas.
In addition, the present invention also provides a degassing method comprising the steps of:
maintaining the product slurry at a temperature;
heating the air to be introduced to the air stripping to a certain temperature;
enabling the slurry to enter the inner wall of a cylindrical deaerator along the tangential direction, and enabling the slurry to flow to a film forming device arranged at the middle section of the deaerator through the action of gravity so as to form a thin layer flowing close to the inner wall of a cylinder body of the deaerator;
feeding heated stripping air to the deaerator while the slurry enters the deaerator;
at a film forming device of the deaerator, air stripping air is in full contact with slurry which is processed by the film forming device to form a thin layer, and gas impurities in the slurry are taken away; and
the treated slurry and stripping air are separated in the deaerator and discharged.
Wherein the degasser is the degasser in the degassing system.
Wherein, according to the properties of different slurries, in order to ensure the optimal flowing state of the slurry, the preheating temperatures of the slurry and the gas stripping air are respectively selected from 60-90 ℃, and preferably, the temperature of the gas stripping air at the gas inlet is slightly higher than the slurry feeding temperature; the rotating speed of the transmission device (rotor) is 60-120 r/min; the flow velocity of the stripping air in the deaerator is 1.0-3 m/s.
The efficient film continuous degassing system can realize continuous operation, is stable, has good removal effect, low operation cost and low energy consumption, and has no pollution in the whole degassing process. The hot water for heat preservation can be recycled infinitely.
The high-efficiency film type continuous degassing system is mainly suitable for removing alkylbenzene, heavy alkylbenzene, fatty alcohol, alcohol ether and the like through a gas phase film type SO3The sulfonation process is used for preparing harmful substances (such as acid gas or dioxane) in various anionic surfactant products such as fatty alcohol polyoxyethylene ether sulfate (AES), heavy alkylbenzene sulfonate and the like, and can also be applied to other types of surfactants or other industrial fields needing to remove gas impurities or harmful substances. The high-efficiency film continuous degassing technology is suitable for removing dioxane and alkyl benzene sulfonic acid (the number of carbon molecules is C) in fatty alcohol-polyoxyethylene ether sodium sulfate (AES)12～C24) And removing acid gas. The system is an independent impurity removal system independent of preparation production equipment, can be directly added behind a membrane type sulfonation or neutralization system (or behind other production equipment), is convenient to assemble, does not need to modify equipment in the original preparation process, and is wide in application and strong in maneuverability.
The film degassing system provided by the invention adds gas stripping air, the gas stripping air disturbs the surface of the slurry film, and harmful substances in the slurry are separated from the slurry at a certain temperature and gas speed, so that the purpose of removing trace harmful substances in the slurry is achieved. The diameter of the rotor of the film degasser is increased, the rotor is of a tubular internal hollow structure, and two ends of the rotor are sealed, so that the flow cross section of a stripping air channel formed between the rotor and the inner cylinder is reduced, the flow velocity of the stripping air in the channel can be improved, the stripping effect is improved, the consumption of the stripping air is reduced, and the production cost is reduced.
Drawings
FIG. 1 is a schematic view of the structure of the high-efficiency membrane degassing system of the present invention.
FIG. 2 is a schematic longitudinal cross-sectional view of a degasser of the present invention
FIG. 3 is a schematic top view of a high efficiency membrane continuous degasser of the present invention.
Detailed Description
In order to make the purpose and technical scheme of the embodiments of the present invention clearer, the following takes the heavy alkylbenzene sulfonic acid product as an example and combines with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical scheme of the embodiments of the present invention, and obviously, the described embodiments are a part of the embodiments of the present invention, but not all the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
An efficient thin film continuous degassing system is provided.
First, as can be seen from the structure of fig. 1 and 2, the system mainly includes three parts, namely, a deaerator 500, a slurry preheater 600, and a stripping air heater 700.
A slurry preheater 600 is added in the incoming material path at the end near the feed inlet of the deaerator 500 for heating the slurry to a temperature at which the slurry has better flowability and the hazardous substances are more easily evaporated.
A stripping air heater 700 is added at the end of the stripping air supply path near the deaerator air inlet 2 for heating the stripping air to a temperature slightly higher than the slurry temperature.
The degasser 500 is mainly a cylinder 3, the top of the degasser is provided with a transmission device 1, the middle of the degasser is provided with a film forming device, and the outside of the cylinder 3 is wrapped with a heat preservation device.
In addition, the upper part of the cylinder 3 is also provided with a stripping air inlet 2, stripping air (for example, dry air or inert gas) with certain temperature and flow velocity after being heated by the stripping air heater 700 passes from top to bottom, and is discharged from a stripping air outlet 9 arranged at the lower part of the cylinder 3. In addition, the upper part of the cylinder body 3 is also provided with a feed inlet 100, slurry enters the deaerator from the feed inlet 100 (with certain temperature and speed) along the tangential direction, a film forming mechanism in an initial state is ensured, and a foundation is laid for the subsequent removal efficiency; the bottom of the cylinder 3 is also provided with a discharge port 101, which can be configured to include an inner cone 11 and an outer cone 10, respectively, which are gradually reduced in diameter downward along the cylinder wall. The lower opening of the inner cone 11 is higher than the lower opening of the outer cone 10. The air outlet 9 is arranged on the outer cone 10 and is higher than the lower opening of the inner cone 11. The device is used for separating entrained products in stripping air; the slurry product is discharged through the outer cone 10.
Wherein, the film forming apparatus includes: a transmission shaft 6 connected to the transmission 1; the rotor 7 (a hollow cylinder structure with closed upper and lower surfaces) is connected with the transmission shaft 6 through a connecting rib 12 (optional); and a multilayer doctor blade 5 connected to the rotor 7. The diameter of the rotor is preferably increased, so that the flow cross section area of a stripping air channel 13 formed between the rotor and the inner cylinder is reduced, the flow velocity of stripping air in the channel can be improved, the stripping effect is improved, and the consumption of the stripping air is reduced. The scrapers 5 are parallel to the inner wall of the cylinder 3, the spacing distance is 0.5-2.5mm, slurry is distributed into a uniform film along the inner wall of the equipment cylinder 3 through the rotating multilayer scrapers 5, the slurry film flows from top to bottom under the action of gravity, the slurry is arranged from top to bottom, a strong vortex disturbance area is formed in front of each scraper, a film area is formed at the back of each scraper, and bubbles formed by harmful substances carried in the slurry in the areas are broken and escaped and are taken out by air stripping air.
A heat preservation device: an insulating jacket 8 is formed between the cylinder 3 and the jacket shell 4, the insulating jacket is multi-section, hot water with certain temperature is introduced into the jacket (preferably, the hot water inlet 50 of each jacket is arranged at the lower part and the hot water outlet 51 is arranged at the upper part; the supply temperature is 45-90 ℃, the supply temperature is related to the property of slurry; and each section of jacket is provided with a temperature detection port 60 independently), so that the slurry is ensured to be at the optimal flowing temperature, and the effects of optimal escaping temperature and uniform film forming are achieved.
The implementation of the efficient thin film continuous degassing technology is as follows: the slurry used in the experiment was a slurry of heavy alkylbenzene sulfonic acid. The active content of the slurry was 84.1% and the free acid gas content was 5%.
Based on this example, the working process of the high-efficiency film continuous degassing system, namely the degassing method, of the invention is as follows (refer to the attached figures 1 and 2):
controlling the temperature of the product slurry of the heavy alkylbenzene sulfonic acid to be 60-75 ℃;
heating the air to be introduced into the air stripping air to the temperature of 70-90 ℃ at the air inlet 2 of the air stripping air;
the slurry enters the inner wall of the cylindrical degasser 500 along the tangential direction and flows to a film forming device arranged at the middle section of the degasser 500 through the action of gravity to form a thin layer flowing close to the inner wall of the cylinder 3;
feeding heated stripping air into the degasser 500 while the slurry enters the degasser 500;
at a film forming device (a scraper 5) of the deaerator, air stripping air is in full contact with slurry which is processed by the film forming device to form a thin layer, and gas impurities in the slurry are taken away; and
the treated slurry and stripping air are separated in a deaerator 500 and discharged.
Wherein, three sections of heat preservation jackets are arranged, and the heat transfer area of the heat preservation jackets is 0.1m2(ii) a The temperature of hot water in the jacket is 60-90 ℃, the flow and the temperature of the hot water are adjusted to ensure that the temperature of slurry in the deaerator is 60-75 ℃, and the outlet temperature of air stripping air is 40-60 ℃ (the vacuum degree in the cylinder is controlled between-0.06 MPa and-0.095 MPa). And (4) introducing the stripping air at the air outlet of the degasser into a waste gas treatment system to remove acid gas in the gas, and discharging after reaching the standard. Fig. 3 is a top cross-sectional view of the degasser. Wherein each diameter represents:
d1 — rotor 7 diameter;
d2 — equipment barrel 3 inside diameter;
d3 — jacket shell 4 diameter;
d4-drive shaft 6 (conventional degasser drive shaft) diameter;
the flow cross-sectional area S of the air stripping air channel is as follows: (D2)2-D12)*π/4
The flow velocity u of the stripping air is as follows: u is Q/S, and Q is the air stripping air flow
It follows that increasing the diameter of the rotor (relative to the drive shaft of a conventional deaerator) effectively reduces the cross-sectional flow area, with flow rate inversely proportional to flow area and the smaller the flow area the greater the flow rate.
Referring to fig. 2 and 3, the heat transfer area F is 12m2The deaerator of (1) is exemplified, and the deaerator cylinder 3 generally has an inner diameter of 900mm and a cylinder height of 4800 mm. The diameter of the drive shaft of a conventional deaerator is 270mm, and no rotor is provided. The rotor of the deaerator of the present invention had an outer diameter of 800mm, and the sectional area of the air-stripping air passage formed between the rotor of the deaerator of the present invention and the jacket shell was 0.133m2The flow area of a conventional deaerator is 0.579m2The deaerator of the present invention is reduced by about 0.446m over a conventional deaerator2When the flow speed of stripping air in the stripping air channel is 1.5m/s, the new type deaerator needs less stripping air quantity than the traditional deaerator, Q is 0.446 multiplied by 1.5 multiplied by 3600 is 2403m3The consumption of air stripping air can be greatly reduced, and the energy consumption is saved.
The embodiments described above were chosen and described in order to best explain the principles of the invention, but are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and many modifications and variations are possible to those skilled in the art to best utilize the invention, the scope of which is defined by the appended claims.
Claims (10)
1. A membrane-type continuous degassing system, characterized in that the degassing system comprises a degasser, a slurry preheater and a gas lift heater.
2. The membrane-type continuous degassing system according to claim 1, wherein the degasser comprises a cylinder, a transmission device, a film forming device and a heat preservation device.
3. The membrane-type continuous degassing system according to claim 2, wherein the cylinder has a feed inlet and a gas inlet at an upper portion thereof, and a discharge outlet and a gas outlet at a lower portion thereof.
4. The membrane-type continuous degassing system according to claim 2 or 3, wherein said film forming means is disposed in said cylinder so as to be form-fitted to said cylinder, and forms a thin layer of slurry of a desired thickness on the inner wall of said cylinder by relative movement with said cylinder.
5. The membrane-type continuous degassing system according to any one of claims 2 to 4, wherein the film-forming device comprises a rotor and a plurality of layers of scrapers, the rotor is of a hollow cylindrical structure, and the scrapers are uniformly and alternately arranged on the cylindrical outer wall of the rotor.
6. The continuous degassing system of any one of claims 2-5, wherein said film forming apparatus further comprises a drive shaft connected to said drive means for driving said film forming apparatus relative to said barrel via said drive means.
7. The membrane-type continuous degassing system according to any one of claims 2 to 6, wherein said heat-insulating means is wrapped around said cylinder for controlling the temperature inside the cylinder.
8. The membrane-type continuous degassing system according to any one of claims 2 to 7, wherein said thermal insulation means comprises one or more sections of thermal insulation jacket, each of said sections of thermal insulation jacket comprising a water inlet and a water outlet.
9. A degassing process, characterized in that it comprises the following steps:
maintaining the product slurry at a temperature;
heating the air to be introduced to the air stripping to a certain temperature;
enabling slurry to enter the inner wall of a cylinder of the deaerator along the tangential direction, enabling the slurry to flow to a film forming device arranged at the middle section of the deaerator through the action of gravity, and processing the slurry to form a thin layer flowing close to the inner wall of the cylinder of the deaerator;
feeding heated stripping air into the deaerator while the slurry enters the deaerator;
at a film forming device of the deaerator, air stripping air is in full contact with slurry which is processed by the film forming device to form a thin layer, and gas impurities in the slurry are taken away; and
the treated slurry and stripping air are separated in the deaerator and discharged.
10. The method of claim 9, wherein the degasser is the degasser of claims 2-8.
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| CN201911409560.1A CN111035968A (en) | 2019-12-31 | 2019-12-31 | Film type continuous degassing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718434A (en) * | 2020-06-29 | 2020-09-29 | 天华化工机械及自动化研究设计院有限公司 | Polymer powder degassing bin |
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| CN107321008A (en) * | 2017-08-03 | 2017-11-07 | 江西塑星材料有限公司 | A kind of continuous removing chlorine in chlorinated paraffin hydrogen and the method for chlorine residue |
| CN208660442U (en) * | 2018-05-25 | 2019-03-29 | 天津市康帕斯润滑油销售有限公司 | A kind of environment-friendly lubricating oil degassing tank |
| CN212262465U (en) * | 2019-12-31 | 2021-01-01 | 北京紫晶石精细化工技术有限公司 | Film type continuous degassing system |
| CN212262462U (en) * | 2019-12-31 | 2021-01-01 | 北京紫晶石精细化工技术有限公司 | Film type degasser |
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| CN111718434A (en) * | 2020-06-29 | 2020-09-29 | 天华化工机械及自动化研究设计院有限公司 | Polymer powder degassing bin |
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