CN220370476U - Liquid phase chloroethylene drying and purifying device - Google Patents
Liquid phase chloroethylene drying and purifying device Download PDFInfo
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- CN220370476U CN220370476U CN202321892120.8U CN202321892120U CN220370476U CN 220370476 U CN220370476 U CN 220370476U CN 202321892120 U CN202321892120 U CN 202321892120U CN 220370476 U CN220370476 U CN 220370476U
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- liquid
- purifier
- gas
- vinyl chloride
- drying
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- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000001035 drying Methods 0.000 title claims abstract description 37
- 239000007791 liquid phase Substances 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 239000007789 gas Substances 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000002912 waste gas Substances 0.000 claims abstract description 6
- 230000008929 regeneration Effects 0.000 claims description 20
- 238000011069 regeneration method Methods 0.000 claims description 20
- 230000008676 import Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 230000018044 dehydration Effects 0.000 abstract description 16
- 238000006297 dehydration reaction Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229920000915 polyvinyl chloride Polymers 0.000 description 10
- 239000004800 polyvinyl chloride Substances 0.000 description 10
- 239000003463 adsorbent Substances 0.000 description 9
- 239000003513 alkali Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000002808 molecular sieve Substances 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000005997 Calcium carbide Substances 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 3
- -1 vinyl chloride peroxide Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Drying Of Gases (AREA)
Abstract
The utility model belongs to the technical field of chemical gas treatment equipment, and particularly relates to a liquid-phase chloroethylene drying and purifying device. The device comprises an electric heater (1), a purifier (2), a heat exchanger (3), a gas-liquid separator (4) and a buffer tank (5); the raw material liquid conveying pipeline is connected with the bottom of the purifier (2), and the top of the purifier (2) is connected with the buffer tank (5); the regenerated gas conveying pipeline is connected with the top of the purifier (2) after passing through the electric heater (1), the bottom of the purifier (2) is connected with the heat exchanger (3) and then is connected with the gas-liquid separator (4), and the gas-liquid separator (4) is connected with the regenerated waste gas outlet. The device has the advantages of high automation degree, less investment, low operation cost, safety, environmental protection, energy saving, high and stable dehydration precision, the water content in the VCM product liquid after the drying treatment by the device can be lower than 100ppm, and the device can be widely applied to the PVC production industry.
Description
Technical Field
The utility model belongs to the technical field of chemical gas treatment equipment, and particularly relates to a liquid-phase chloroethylene drying and purifying device.
Background
The quality of vinyl chloride monomer directly affects the quality of PVC resin, and the production cost directly affects the economic benefit of PVC. The existence of water in the vinyl chloride monomer can lead to the hydrolysis reaction of the vinyl chloride peroxide to generate acidic substances such as hydrogen chloride (which is changed into hydrochloric acid when meeting water), formic acid, formaldehyde and the like, and corrode steel equipment, and the generated iron ions directly influence the quality of PVC resin, so that the quantity of black yellow spots and fish eyes in the PVC is increased. The existence of iron ions promotes the reaction of oxygen in the system and vinyl chloride monomer to generate peroxide, and the peroxide can repeatedly hydrolyze and initiate the polymerization of the vinyl chloride monomer to generate PVC with low polymerization degree, so that the rectification system is self-polymerized and blocked, and the normal production is seriously influenced. The harm to water in vinyl chloride at home and abroad is common, so that it is necessary to adopt dehydration and drying technology and equipment in the production process of vinyl chloride.
The application of the novel bar alkali in a VCM device purifier (polyvinyl chloride, 2003 (5)) is described in the text, and the existing drying method of vinyl chloride and polyvinyl chloride generally comprises solid alkali (NaOH) dehydration drying and molecular sieve dehydration drying, and the application of solid alkali dehydration drying is mainly described in combination with the characteristics of the technology for producing vinyl chloride and polyvinyl chloride by the calcium carbide method in China. The initial investment of the solid alkali dehydration and drying is relatively small, but the later operation cost is high, the method can be suitable for the dehydration and drying of vinyl chloride with high water content, and is more applied to the production process of producing vinyl chloride by a calcium carbide method and having an alkali washing process; the conventional molecular sieve dehydration and drying method has relatively large initial investment, but lower operation cost in the later stage, and is suitable for the dehydration and drying of vinyl chloride in the production process with lower water content and no alkaline washing process. The conventional molecular sieve dehydration is mainly used for removing trace moisture, and the molecular sieve can be recycled after being regenerated by using inert gases such as external nitrogen, so that the inert gases such as nitrogen are easy to introduce, the purity of chloroethylene in desorption gas is influenced, and the discharged nitrogen contains a large amount of chloroethylene components, so that the recovery rate of chloroethylene is reduced, the environment is polluted, and the operation cost is high. Under the condition of producing vinyl chloride by a calcium carbide method, the water content in the vinyl chloride is high, and most manufacturers adopt a solid alkali dehydration drying technology. Therefore, the method has the defects of higher running cost, easy equipment blockage and corrosion, difficult waste lye treatment, influence on product quality and the like.
Chinese patent publication No. CN200988828Y describes a high-efficiency dewatering device for vinyl chloride, which integrates novel high-efficiency liquid-phase coalescence technology, water-repellent separation technology and traditional sedimentation separation technology, and the residual liquid-phase water content of the dewatered vinyl chloride is less than or equal to 50 multiplied by 10 －6 However, it is practically only possible to partially remove water in the liquid phase in the free state (i.e., water droplets or water droplets which are free from vinyl chloride), and it is impossible to remove water dissolved in vinyl chloride. According to the information of the handbook of physical and chemical constants of chlor-alkali industry, the water content dissolved in the vinyl chloride can reach 1100 multiplied by 10 even if the temperature of the liquid-phase vinyl chloride is reduced to 25 DEG C －6 Above, and since these water components are completely miscible with vinyl chloride, it is almost impossible to separate and remove them except by means of rectification, adsorption separation or chemical reaction. Therefore, the method has low dehydration precision, and the filter element is easy to be blocked, thereby bringing trouble to maintenance.
Therefore, a reasonable method for drying vinyl chloride monomer is needed, the quality of vinyl chloride product is improved, the corrosion of equipment is reduced and eliminated, the running energy consumption is reduced, and the automation degree operation is realized.
Disclosure of Invention
Aiming at the technical problems, the utility model aims to provide the liquid-phase chloroethylene drying and purifying device which has the advantages of low operation cost, high automation degree, high safety performance, low investment, high dehydration precision and stability.
In order to achieve the purpose of the utility model, the specific technical scheme of the utility model is as follows:
the liquid phase chloroethylene drying and purifying device comprises a heat exchanger, an electric heater, a gas-liquid separator, a purifier, a buffer tank, a program control valve and a regulating valve. Wherein, the raw material liquid conveying pipeline is connected with the bottom of the purifier, and the top of the purifier is connected with the buffer tank; the regenerated gas conveying pipeline is connected with the top of the purifier after passing through the electric heater, the bottom of the purifier is connected with the heat exchanger and then connected with the gas-liquid separator, and the gas-liquid separator is connected with the regenerated waste gas outlet.
As a preferred embodiment in the present application, the other end of the buffer tank is connected to the product liquid outlet.
As a preferred embodiment in the present application, the purifier is connected to the heat exchanger and then to the recovery liquid device.
As a better implementation mode in this application, the clarifier on be provided with regeneration gas export, feed liquor import, regeneration gas import, product liquid export, wherein, regeneration gas export and feed liquor import all set up in the bottom of clarifier, regeneration gas import and product liquid export all set up at the top of clarifier.
As a better implementation mode in the application, the electric heater is connected with the regenerated gas inlet through a pipeline; the product liquid outlet is connected with the buffer tank through a pipeline and then connected with the liquid pump; the regenerated gas outlet is connected with the heat exchanger through a pipeline and then connected with the gas-liquid separator.
As a preferred embodiment in the application, the number of the purifiers is 2-5, and each purifier is connected in parallel.
As a preferred embodiment in the present application, a bypass is provided in the electric heater.
As a preferred embodiment in the present application, a programmable valve is provided on the purifier, and each programmable valve is connected with the control device.
As a preferred embodiment in the present application, the purifier is filled with a composite adsorbent filler consisting of alumina, activated carbon, silica gel and molecular sieve.
The working principle of the device is as follows:
the raw material liquid enters the device at the temperature of between 0.2 and 0.8MPa and 40 ℃, firstly enters the purifier from the bottom of the purifier, automatically enters the regenerated purifier through a preset program control system, is adsorbed and separated by an adsorbent filled in the purifier, and most of impurities such as water are adsorbed by the adsorbent, and the dried chloroethylene is discharged from the top of the tower, is buffered by a buffer tank and is then conveyed to a rear working section for use. After the adsorption of one purifier is finished, the regenerated gas enters from the top of the purifier after being heated by the electric heater, the purifier is heated and regenerated, and the water adsorbed in the tower and the residual monomer are taken out from the bottom of the tower, so that the regeneration of the adsorbent is realized, and the next drying process is ready to be carried out.
The whole process is circularly operated by 2-5 purifiers, the time is uniformly staggered, and the whole switching process is automatically controlled by a preset program system, so that the continuous, stable and safe operation of the device is ensured.
Compared with the prior art, the utility model has the following positive effects:
firstly, by designing 2-5 purifiers, wherein 1-4 purifiers are used for drying and the other purifier is used for regenerating, the dehydration precision of the chloroethylene can be effectively controlled below 100 ppm.
And secondly, the regenerated gas of the device can be nitrogen or waste gas discharged by other working sections, so that the consumption of the nitrogen can be effectively reduced.
And thirdly, the device can not bring impurities into the chloroethylene product, but can further purify other trace impurities in the chloroethylene, and finally, the product quality is effectively improved.
And fourthly, the whole device has low operation cost, high automation degree, high safety performance, less investment, convenient installation, safety, environmental protection, energy conservation, high and stable dehydration precision and can be widely applied to the PVC production industry.
Drawings
FIG. 1 is a schematic diagram showing the connection relation of all components in the liquid-phase chloroethylene drying and purifying device.
Wherein, 1 is an electric heater; 2-a purifier; 3-a heat exchanger; 4, a gas-liquid separator; 5-buffer tank; 6-an adjusting valve; 7-a regeneration gas outlet; 8, a raw material liquid inlet; 9-a regeneration gas inlet; 10-product liquid outlet; 11-program control valve.
Detailed Description
The liquid phase chloroethylene drying and purifying device comprises a heat exchanger, an electric heater, a gas-liquid separator, a purifier, a buffer tank, a program control valve and a regulating valve. Wherein, the raw material liquid conveying pipeline is connected with the bottom of the purifier, and the top of the purifier is connected with the buffer tank; the regenerated gas conveying pipeline is connected with the top of the purifier after passing through the electric heater, the bottom of the purifier is connected with the heat exchanger and then connected with the gas-liquid separator, and the gas-liquid separator is connected with the regenerated waste gas outlet.
The other end of the buffer tank is connected with a product liquid outlet.
The purifier is connected with the heat exchanger and then connected with the recovery liquid device.
The purifier on be provided with regeneration gas export, raw material liquid import, regeneration gas import, product liquid export, wherein, regeneration gas export and raw material liquid import all set up in the bottom of purifier, regeneration gas import and product liquid export all set up at the top of purifier.
The electric heater is connected with the regenerated gas inlet through a pipeline; the product liquid outlet is connected with the buffer tank through a pipeline and then connected with the liquid pump; the regenerated gas outlet is connected with the heat exchanger through a pipeline and then connected with the gas-liquid separator.
The electric heater is provided with a bypass.
The number of the purifiers is 2-5, and the number of the purifiers can be specifically 2, 3, 4 and 5, and each purifier is connected in parallel.
The purifier is provided with program control valves, and each program control valve is connected with the control device.
The purifier is filled with composite adsorbent filler consisting of alumina, active carbon, silica gel and molecular sieve.
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that, for the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, in the present utility model, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present utility model can be known by those skilled in the art without any creative effort.
Example 1:
the liquid phase chloroethylene drying and purifying device has a structure shown in figure 1, and comprises a heat exchanger, an electric heater, a gas-liquid separator, a purifier, a buffer tank, a program control valve and a regulating valve. Wherein, the raw material liquid conveying pipeline is connected with the bottom of the purifier, and the top of the purifier is connected with the buffer tank; the regenerated gas conveying pipeline is connected with the top of the purifier after passing through the electric heater, the bottom of the purifier is connected with the heat exchanger and then connected with the gas-liquid separator, and the gas-liquid separator is connected with the regenerated waste gas outlet.
The other end of the buffer tank is connected with a product liquid outlet.
The purifier is connected with the heat exchanger and then connected with the liquid recovery device.
The purifier on be provided with regeneration gas export, raw material liquid import, regeneration gas import, product liquid export, wherein, regeneration gas export and raw material liquid import all set up in the bottom of purifier, regeneration gas import and product liquid export all set up at the top of purifier.
The electric heater is connected with the regenerated gas inlet through a pipeline; the product liquid outlet is connected with the buffer tank through a pipeline and then connected with the liquid pump; the regenerated gas outlet is connected with the heat exchanger through a pipeline and then connected with the gas-liquid separator.
The electric heater is provided with a bypass, so that the regenerated gas can be conveniently recycled.
The number of the purifiers is 2, and the two purifiers are connected in parallel.
The purifier is provided with program control valves, and each program control valve is connected with the control device.
The purifier is filled with composite adsorbent filler consisting of alumina, activated carbon, silica gel and molecular sieve, and the technology is not repeated in the prior art.
The process steps for drying the liquid-phase chloroethylene by using the device are as follows:
the pressure of the liquid phase chloroethylene is 0.4MPa, the temperature of the raw material liquid is 40 ℃, the flow is about 2t/h, and the components of the raw material liquid are as follows: liquid phase vinyl chloride+water (1.6%).
The raw material liquid enters the device through a raw material liquid conveying pipe at the temperature of minus 0.4MPa and 40 ℃, enters the purifier from the bottom of the purifier after being cooled and separated, automatically enters the regenerated purifier through a preset program control system, is adsorbed and separated through an adsorbent filled in the purifier, and most of impurities such as water are adsorbed by the adsorbent, and the dried chloroethylene is discharged from the top of the tower, is buffered by a buffer tank and is then sent to a rear working section for use. After the adsorption of one purifier is finished, the regenerated gas enters from the top of the purifier after being heated by the electric heater, the purifier is heated and regenerated, and the water adsorbed in the tower and the residual monomer are taken out from the bottom of the tower, so that the regeneration of the adsorbent is realized, and the next drying process is ready to be carried out.
2 purifiers in the whole process circularly work and are staggered uniformly in time, and the whole switching process is automatically controlled by a preset program system, so that the continuous, stable and safe operation of the device is ensured. The circulating unit process of each purifier is as follows: g (dry) -S (recovery) -Z (displacement) -H (hot blow) -C (cold blow) -FR (boost).
Therefore, the device is simple, has high automation degree, low investment, low operation cost, safety, environmental protection, energy conservation, high and stable dehydration precision, and the total moisture content in the VCM product liquid after the drying treatment by the device can be lower than 100ppm, thereby being widely applied to the PVC production industry.
Example 2:
the liquid-phase vinyl chloride drying and purifying apparatus was the same as in example 1 except that the number of the purifiers was changed to 2, 4 or 5, and the remaining connection relations were adaptively adjusted.
This embodiment is verified to achieve similar technical effects as those of embodiment 1.
The foregoing basic embodiments of the utility model, as well as various further alternative embodiments thereof, may be freely combined to form numerous embodiments, all of which are contemplated and claimed by the present utility model. In the scheme of the utility model, each selection example can be arbitrarily combined with any other basic example and selection example. Numerous combinations will be apparent to those skilled in the art.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The liquid-phase chloroethylene drying and purifying device comprises an electric heater (1), a purifier (2), a heat exchanger (3), a gas-liquid separator (4) and a buffer tank (5); the method is characterized in that: the raw material liquid conveying pipeline is connected with the bottom of the purifier (2), and the top of the purifier (2) is connected with the buffer tank (5); the regenerated gas conveying pipeline is connected with the top of the purifier (2) after passing through the electric heater (1), the bottom of the purifier (2) is connected with the heat exchanger (3) and then is connected with the gas-liquid separator (4), and the gas-liquid separator (4) is connected with the regenerated waste gas outlet.
2. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 1, wherein: the other end of the buffer tank (5) is connected with a product liquid outlet.
3. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 1, wherein: the purifier (2) is connected with the heat exchanger (3) and then is connected with the recovery liquid device.
4. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 1, wherein: and a bypass is arranged on the electric heater (1).
5. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 1, wherein: the purifier (2) on be provided with regeneration gas export (7), raw materials liquid import (8), regeneration gas import (9), product liquid export (10), wherein, regeneration gas export (7) and raw materials liquid import (8) all set up in the bottom of purifier (2), regeneration gas import (9) and product liquid export (10) all set up at the top of purifier (2).
6. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 5, wherein: the electric heater (1) is connected with the regenerated gas inlet (9) through a pipeline.
7. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 5, wherein: the product liquid outlet (10) is connected with the buffer tank (5) through a pipeline.
8. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 5, wherein: the regenerated gas outlet (7) is connected with the heat exchanger (3) through a pipeline and then connected with the gas-liquid separator (4).
9. The liquid-phase vinyl chloride drying and purifying apparatus according to any one of claims 1 to 8, wherein: the number of the purifiers (2) is 2-5, and the purifiers (2) are connected in parallel.
10. The liquid-phase vinyl chloride drying and purifying apparatus according to claim 9, wherein: the purifier (2) is provided with program control valves (11), and each program control valve (11) is connected with a control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321892120.8U CN220370476U (en) | 2023-07-18 | 2023-07-18 | Liquid phase chloroethylene drying and purifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321892120.8U CN220370476U (en) | 2023-07-18 | 2023-07-18 | Liquid phase chloroethylene drying and purifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220370476U true CN220370476U (en) | 2024-01-23 |
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ID=89563296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321892120.8U Active CN220370476U (en) | 2023-07-18 | 2023-07-18 | Liquid phase chloroethylene drying and purifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220370476U (en) |
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2023
- 2023-07-18 CN CN202321892120.8U patent/CN220370476U/en active Active
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