CN115072722A - Edible carbon dioxide liquefaction preparation method and device - Google Patents
Edible carbon dioxide liquefaction preparation method and device Download PDFInfo
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- CN115072722A CN115072722A CN202210794778.9A CN202210794778A CN115072722A CN 115072722 A CN115072722 A CN 115072722A CN 202210794778 A CN202210794778 A CN 202210794778A CN 115072722 A CN115072722 A CN 115072722A
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Abstract
The invention belongs to the technical field of edible carbon dioxide liquefaction processes, and provides a method and a device for preparing edible carbon dioxide through liquefaction. The method of the invention comprises the following steps: s1: adsorbing carbon dioxide gas by a dry method; s2: hydrolyzing carbon dioxide gas; s3: removing impurities in the carbon dioxide by low-temperature rectification to obtain a rectification liquid; s4: the obtained distillate was cooled and liquefied to a liquid. The device of the invention comprises at least one integrated tower; the integrated tower comprises an energy supply cylinder, a reaction cylinder and a distillation cylinder; one end of the reaction cylinder is fixedly connected with the energy supply cylinder, and the other end of the reaction cylinder is fixedly connected with the distillation cylinder; the energy supply cylinder is fixedly arranged in the direction close to the ground; the energy supply cylinder is provided with a feeding hole and an air vent; in conclusion, the invention provides a method and a device for preparing edible carbon dioxide by liquefaction, which can improve the operability, increase the liquefaction rate, reduce the investment and facilitate the transportation and storage.
Description
Technical Field
The invention relates to the technical field of edible carbon dioxide liquefaction processes, in particular to a method and a device for preparing edible carbon dioxide through liquefaction.
Background
Carbon dioxide (Carbon dioxide), molecular formula CO2, relative molecular mass 44.01. Carbon dioxide is a colorless, odorless, tasteless, non-toxic gas. Melting point-56, 6 deg.C (526.89kPa), boiling point-78.6 deg.C (sublimation), density 1.977 g/L. Dissolved in water, 0.14499/1009(25 ℃ C.). The aqueous solution is acidic. The carbon dioxide was pressurized to 5978.175kPa at 20 ℃ and was liquefied to a relative density of 1.0310.
Since CO2 has the advantages of high refrigeration speed, good operation performance, no wetting, no pollution to food, and capability of inhibiting botulinum (botulinum), the dry ice is widely used in the ice cream industry, and the dry ice and liquid CO2 are widely used in the fresh-keeping, freezing and refrigerating of various foods.
The traditional preparation process mostly adopts a medium-pressure preparation method, wherein the operation pressure is 1.6-2.8 MPa, the refrigeration power consumption is correspondingly low, and the liquefaction temperature is also high, so that the whole equipment is complex and the process is complicated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a device for liquefying edible carbon dioxide, which are used for improving the operability, increasing the liquefying rate, reducing the investment and being convenient to transport and store.
In a first aspect, the invention provides a method for preparing edible carbon dioxide by liquefaction, which comprises the following steps:
step 1: adsorbing carbon dioxide gas by a dry method to obtain carbon dioxide gas with the humidity lower than atmospheric humidity;
step 2: filling carbon dioxide gas with the humidity lower than the atmospheric humidity into the liquid, and hydrolyzing until the carbon dioxide gas is completely filled into the liquid;
and step 3: removing impurities in carbon dioxide by adopting integrated double-tower low-temperature rectification to obtain a rectification liquid;
and 4, step 4: the obtained rectification liquid is cooled and liquefied into a liquid.
Further, the first step and the second step can be performed simultaneously. In actual operation, the operation is carried out simultaneously, so that the efficiency is improved, and the process steps and devices are reduced;
further, the first step and the second step are operated at atmospheric pressure of 1.2MPa to 3.4 MPa.
Furthermore, the cooling liquefaction in the fourth step adopts a two-stage freon circulating compression refrigeration mode.
According to the technical scheme, the edible carbon dioxide liquefaction preparation method provided by the invention has the beneficial effects that:
(1) firstly, the product has high purity, and before dehydration, the carbon dioxide gas is firstly subjected to filling drying treatment to obtain gas with low humidity, so that impurities adsorbed in water molecules are subjected to adsorption treatment at the same time, and the dry adsorption is common solid carbonate, which is a conventional technology and is not described herein any more;
(2) the liquefaction rate is high, and the integrated double-tower cryogenic rectification is adopted, so that the effect of circulating liquefaction can be formed by the integrated double towers, and the integrated double towers are not described herein; the design of circulation liquefaction can greatly improve the liquefaction efficiency.
(3) And the characteristic of convenient storage in the preparation of liquefied carbon dioxide by the medium-pressure method is kept, so that the prepared carbon dioxide liquid by the medium-pressure liquefaction method is still kept, and the transportation are convenient.
(4) And from a commercial perspective, the improved intermediate pressure liquefaction process also saves cost by integrating the two-column and low temperature process preparation.
In a second aspect, the invention provides an edible carbon dioxide liquefaction preparation device, which comprises at least one integrated tower;
the integrated tower comprises an energy supply cylinder, a reaction cylinder and a distillation cylinder; one end of the reaction cylinder is fixedly connected with the energy supply cylinder, and the other end of the reaction cylinder is fixedly connected with the distillation cylinder; the energy supply cylinder is fixedly arranged in the direction close to the ground; the energy supply cylinder is provided with a feeding hole and an air vent;
the reaction cylinder comprises a cylinder body, a bottom sealing tank body, a liquid inlet pipe and an air inlet pipe; the cylinder body is arranged on the energy supply cylinder and is fixedly connected with the energy supply cylinder; the bottom sealing tank body is arranged on the cylinder body and is fixedly connected with the cylinder body;
one end of the air inlet pipe is arranged at the bottom of the bottom sealing tank body and is communicated with the bottom sealing tank body, and the other end of the air inlet pipe extends towards the cylinder body and penetrates through the cylinder wall on one side of the cylinder body until being communicated with the outside;
the liquid inlet pipe is arranged in the bottom sealing tank body, penetrates through one side wall of the bottom sealing tank body, is communicated with the bottom sealing tank body and extends out of the side wall of the bottom sealing tank body;
the distillation barrel comprises a main barrel and a condensation taper sleeve; the main cylinder is arranged on the back cover tank body and is fixedly connected with the back cover tank body; the condensation taper sleeve is arranged in the main cylinder; wherein the condensation taper sleeve has two sets, and in the axis direction of condensation taper sleeve, be relative setting from top to bottom.
Further, the drying air inlet box body is also included; the drying air inlet box body is fixedly connected with the air inlet pipe and communicated with the air inlet pipe. In practical application, in the dry adsorption, the used drying agent is arranged in the drying air inlet box body, wherein the drying air inlet box body adopts a bolt fixing mode, so that the detachable fixation is realized; the drying agent is convenient to replace integrally; thus being convenient for industrial application.
Further, the distillation cylinder also comprises a condensation mechanism and a condensation spiral pipe; the condensation mechanism is arranged outside the main cylinder; the main cylinder is also provided with a condensation inlet pipe and a condensation outlet pipe; the condensation spiral pipe is arranged in the condensation taper sleeve and is positioned in the condensation taper sleeve far away from the bottom-sealed tank body; one end of the condensation spiral pipe is connected and communicated with the condensation inlet pipe; the other end of the condensation spiral pipe is connected and communicated with the condensation outlet pipe; the condensation mechanism is used for refrigerating, and is connected and communicated with the condensation spiral pipe through a condensation inlet pipe and a condensation outlet pipe. In practical application, the cooling liquid is filled in the condensation taper sleeve, and the condensation mechanism adopts two-stage Freon circulating compression refrigeration, so that the refrigeration effect is better; the adopted condensation spiral pipe increases the cooling area and facilitates the aggregation of liquid drops; eventually forming a liquid.
Further, the distillation cylinder also comprises a heat transfer pipe, one end of the heat transfer pipe is installed in the bottom-sealed tank body, and the other end of the heat transfer pipe is arranged in the condensation taper sleeve and is positioned in the condensation taper sleeve close to the bottom-sealed tank body; the heat transfer pipe is provided with a connecting section, a heat conducting section and a heat transfer section; one end of the connecting section is connected with the heat conducting section, and the other end of the connecting section is connected with the heat transferring section; the heat conduction section is arranged in the back cover tank body; the heat transfer section is arranged in the condensation taper sleeve close to the bottom sealing tank body. In the actual application, this design has guaranteed during heat transmission to the condensation taper sleeve of below, has realized that the condensation taper sleeve of top is cold, and the condensation taper sleeve of below is hot, and under cold and hot in turn, more conveniently forms the liquid drop gathering.
Furthermore, the heat conducting section is in a conical tower shape, and at least one honeycomb structure is arranged in the heat conducting section; the heat transfer section is provided with at least one radiating fin. In practical application, the design ensures the heat transfer efficiency and saves energy.
Furthermore, the collecting pipe is arranged in the distillation barrel, extends outwards to the outside of the distillation barrel and is used for collecting liquid drops formed on the condensation taper sleeve. In practice, one end of the collecting pipe is provided with a collecting disc which is arranged below the condensation taper sleeve.
According to the technical scheme, the edible carbon dioxide liquefaction preparation device provided by the invention has the beneficial effects that:
the adopted grading refrigeration technology perfectly solves the problem of cold and hot energy consumption; the key heat exchange equipment adopts a fin heat dissipation technology by adopting unique heat and cold utilization measures, so that the cold and hot temperature difference is accurately controlled within 2 ℃, and the product consumption is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention, reference will now be made briefly to the embodiments or to the accompanying drawings that are needed in the description of the prior art. The elements or parts are not necessarily drawn to scale in all figures.
FIG. 1 is a schematic flow chart of a method for liquefying edible carbon dioxide according to the present invention;
FIG. 2 is a schematic structural view of an apparatus for liquefying edible carbon dioxide according to the present invention;
FIG. 3 is an enlarged schematic view of the point A shown in FIG. 2;
FIG. 4 is a schematic structural view of a heat transfer tube according to the present invention;
reference numerals:
the device comprises an integrated tower 1, an energy supply cylinder 2, a feed hole 21, a vent hole 22, a reaction cylinder 3, a cylinder body 31, a bottom sealing tank body 33, a liquid inlet pipe 34, an air inlet pipe 35, a distillation cylinder 4, a main cylinder 41, a condensation inlet pipe 411, a condensation outlet pipe 412, a condensation taper sleeve 42, a condensation mechanism 43, a condensation spiral pipe 44, a heat transfer pipe 45, a connecting section 451, a heat conduction section 452, a heat transfer section 453, a drying air inlet box body 5, a honeycomb structure 4521, a radiating fin 4531, a collecting pipe 6, a collecting tray 61 and a connecting pipe 7.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
The embodiment is basically as shown in the attached figures 1 to 4:
example 1:
as shown in fig. 1-4, the method and the apparatus for liquefying edible carbon dioxide provided in this embodiment can improve operability, increase liquefaction rate, reduce investment, and facilitate transportation and storage.
The preparation method for liquefying the edible carbon dioxide comprises the following steps:
step 1: adsorbing carbon dioxide gas by a dry method to obtain carbon dioxide gas with the humidity lower than atmospheric humidity;
step 2: filling carbon dioxide gas with humidity lower than atmospheric humidity into liquid, and hydrolyzing until the carbon dioxide gas is completely filled into the liquid;
and step 3: removing impurities in the carbon dioxide by adopting integrated double-tower low-temperature rectification to obtain a rectification liquid;
and 4, step 4: the obtained rectification liquid is cooled and liquefied into a liquid.
Further, the first step and the second step can be performed simultaneously. In actual operation, the operation is carried out simultaneously, so that the efficiency is improved, and the process steps and devices are reduced;
further, the first step and the second step are operated at atmospheric pressure of 1.2MPa to 3.4 MPa.
Furthermore, the cooling liquefaction in the fourth step adopts a two-stage freon circulating compression refrigeration mode. In actual operation, the product purity is high, and before dehydration, the carbon dioxide gas is firstly subjected to filling drying treatment to obtain gas with low humidity, so that impurities adsorbed in water molecules are subjected to adsorption treatment at the same time, and the dry adsorption is common solid carbonate, because the dry adsorption is a conventional technology, the process is not repeated; the liquefaction rate is high, and the integrated double-tower cryogenic rectification is adopted, so that the effect of circulating liquefaction can be formed by the integrated double towers, and the integrated double towers are not described herein; the design of circulation liquefaction can greatly improve the liquefaction efficiency. And the characteristic of convenient storage in the preparation of liquefied carbon dioxide by the medium-pressure method is kept, so that the prepared carbon dioxide liquid by the medium-pressure liquefaction method is still kept, and the transportation are convenient. And from a commercial perspective, the improved intermediate pressure liquefaction process also saves cost by integrating the two-column and low temperature process preparation.
Example 2:
as shown in fig. 1-4, the present invention provides an apparatus for liquefying and preparing edible carbon dioxide, which comprises at least one integrated tower 1; in practical application, a double-tower structure is adopted to carry out a carbon dioxide liquefaction process; meanwhile, the integrated tower 1 comprises an energy supply cylinder 2, a reaction cylinder 3 and a distillation cylinder 4; one end of the reaction cylinder 3 is fixedly connected with the energy supply cylinder 2, and the other end of the reaction cylinder 3 is fixedly connected with the distillation cylinder 4; the energy supply cylinder 2 is fixedly arranged in the direction close to the ground; the energy supply cylinder 2 is provided with a feeding hole 21 and a vent hole 22; thus, the heat radiation effect of air heating is conveniently formed. The distillation column 4 is heated sufficiently. The reaction cylinder 3 comprises a cylinder body 31, a bottom sealing tank body 33, a liquid inlet pipe 34 and an air inlet pipe 35; the cylinder body 31 is mounted on the energy supply cylinder 2 and is fixedly connected with the energy supply cylinder 2; the bottom sealing tank body 33 is arranged on the cylinder body 31 and is fixedly connected with the cylinder body 31; one end of the air inlet pipe 35 is arranged at the bottom of the bottom sealing tank body 33 and is communicated with the bottom sealing tank body 33, and the other end of the air inlet pipe 35 extends towards the cylinder body 31 and penetrates through the cylinder wall on one side of the cylinder body 31 until being communicated with the outside; the liquid inlet pipe 34 is arranged in the bottom sealing tank 33, penetrates through one side wall of the bottom sealing tank 33, is communicated with the bottom sealing tank 33 and extends out of the side wall of the bottom sealing tank 33; the distillation barrel 4 comprises a main barrel 41 and a condensation taper sleeve 42; the main cylinder 41 is mounted on the bottom sealing tank 33 and is fixedly connected with the bottom sealing tank 33; the condensation cone 42 is installed in the main cylinder 41; the condensation taper sleeves 42 are provided with two sets, and are arranged in the axial direction of the condensation taper sleeves 42 in an up-down opposite mode. In practical application, the adopted grading refrigeration technology perfectly solves the problem of cold and heat energy consumption; the key heat exchange equipment adopts a fin heat dissipation technology by adopting unique heat and cold utilization measures, so that the cold and hot temperature difference is accurately controlled within 2 ℃, and the product consumption is effectively reduced.
In the embodiment, the drying device further comprises a drying air inlet box body 5; the drying air inlet box body 5 is fixedly connected with the air inlet pipe 35 and communicated with the air inlet pipe. In practical application, in the dry adsorption, the used drying agent is arranged in the drying air inlet box body 5, wherein the drying air inlet box body 5 adopts a bolt fixing mode, so that the detachable fixation is realized; the drying agent is convenient to replace integrally; thus being convenient for industrial application.
In this embodiment, the distillation cylinder 4 further comprises a condensing mechanism 43 and a condensing spiral tube 44; the condensing mechanism 43 is installed outside the main cylinder 41; the main drum 41 also has a condensation inlet pipe 411 and a condensation outlet pipe 412; the condensation spiral pipe 44 is arranged in the condensation taper sleeve 42 and is positioned in the condensation taper sleeve 42 away from the direction of the bottom-sealed tank body 33; one end of the condensation spiral pipe 44 is connected and communicated with the condensation inlet pipe 411; the other end of the condensing spiral pipe 44 is connected and communicated with the condensing outlet pipe 412; the condensing mechanism 43 is used for cooling, and is connected and communicated with the condensing spiral 44 through a condensing inlet pipe 411 and a condensing outlet pipe 412. In practical application, the cooling liquid is filled in the condensation taper sleeve 42, and the condensation mechanism 43 adopts two-stage Freon cyclic compression refrigeration, so that the refrigeration effect is better; the adopted condensation spiral pipe 44 increases the cooling area, and facilitates the aggregation of liquid drops; eventually forming a liquid.
In the present embodiment, the distillation column 4 further includes a heat transfer pipe 45, one end of the heat transfer pipe 45 is installed in the bottom-sealed tank 33, and the other end of the heat transfer pipe 45 is disposed in the condensation cone 42 and located in the condensation cone 42 near the bottom-sealed tank 33; the heat transfer pipe 45 has a connection section 451, a heat conducting section 452, and a heat transfer section 453; one end of the connecting section 451 is connected to the heat conducting section 452, and the other end of the connecting section 451 is connected to the heat transferring section 453; the heat conducting section 452 is disposed in the bottom can 33; the heat transfer section 453 is disposed in the condensation cone 42 adjacent the back-cover tank 33. In practical application, this design has guaranteed that heat transfer to in the condensation taper sleeve 42 of below, has realized that the condensation taper sleeve 42 of top is cold, and the condensation taper sleeve 42 of below is hot, and under cold and hot alternation, more conveniently forms the liquid drop gathering.
In this embodiment, the heat conducting section 452 is in a shape of a conical tower, and at least one honeycomb structure 4521 is arranged in the heat conducting section 452; the heat transfer section 453 has not less than one heat radiating fin 4531. In practical application, the design ensures the heat transfer efficiency and saves energy.
In the embodiment, the liquid-collecting device further comprises a collecting pipe 6, wherein the collecting pipe 6 is arranged in the distillation barrel 4, and the collecting pipe 6 extends outwards to the outside of the distillation barrel 4 and is used for collecting liquid drops formed on the condensation cone 42. In practice, the collecting pipe has a collecting tray 61 at one end, and the collecting tray 61 is arranged below the condensation cone 42. Of course, in order to achieve double column rectification, a connecting pipe 7 is also included for connection between the double columns.
In summary, the edible carbon dioxide liquefaction preparation method and the device thereof have the advantages of reasonable structural design, simple and easy operation of the device, high liquefaction rate, high product purity, good quality, investment saving and convenient transportation and storage, and are suitable for industrial popularization.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The method for preparing the edible carbon dioxide by liquefaction is characterized by comprising the following steps:
the method comprises the following steps: adsorbing carbon dioxide gas by using a dry method to obtain carbon dioxide gas with the humidity lower than the atmospheric humidity;
step two: filling carbon dioxide gas with humidity lower than atmospheric humidity into liquid, and hydrolyzing until the carbon dioxide gas is completely filled into the liquid;
step three: removing impurities in the carbon dioxide by adopting integrated double-tower low-temperature rectification to obtain a rectification liquid;
step four: the obtained rectification liquid is cooled and liquefied into a liquid.
2. The method for preparing edible carbon dioxide by liquefaction according to claim 1, wherein the first step and the second step are performed simultaneously.
3. The method for preparing edible carbon dioxide by liquefaction according to claim 1, wherein the first step and the second step are carried out at atmospheric pressure of 1.2MPa to 3.4 MPa.
4. The method for preparing edible carbon dioxide by liquefaction according to claim 1, wherein a two-stage freon cycle compression refrigeration method is adopted for cooling and liquefaction in the fourth step.
5. An edible carbon dioxide liquefaction preparation device, which utilizes the edible carbon dioxide liquefaction preparation method of any one of claims 1 to 4, and is characterized by comprising not less than one integrated tower;
the integrated tower comprises an energy supply cylinder, a reaction cylinder and a distillation cylinder; one end of the reaction cylinder is fixedly connected with the energy supply cylinder, and the other end of the reaction cylinder is fixedly connected with the distillation cylinder; the energy supply cylinder is fixedly arranged in the direction close to the ground; the energy supply cylinder is provided with a feeding hole and an air vent;
the reaction cylinder comprises a cylinder body, a bottom sealing tank body, a liquid inlet pipe and an air inlet pipe; the cylinder body is arranged on the energy supply cylinder and is fixedly connected with the energy supply cylinder; the bottom sealing tank body is arranged on the cylinder body and is fixedly connected with the cylinder body;
one end of the air inlet pipe is arranged at the bottom of the bottom sealing tank body and is communicated with the bottom sealing tank body, and the other end of the air inlet pipe extends towards the cylinder body and penetrates through the cylinder wall on one side of the cylinder body until being communicated with the outside;
the liquid inlet pipe is arranged in the bottom sealing tank body, penetrates through one side wall of the bottom sealing tank body, is communicated with the bottom sealing tank body and extends out of the side wall of the bottom sealing tank body;
the distillation barrel comprises a main barrel and a condensation taper sleeve; the main cylinder is arranged on the back cover tank body and is fixedly connected with the back cover tank body; the condensation cone sleeve is arranged in the main cylinder; wherein the condensation taper sleeve has two sets, and in the axis direction of condensation taper sleeve, is relative setting from top to bottom.
6. The apparatus for liquefied preparation of edible carbon dioxide as claimed in claim 5, further comprising a drying inlet box; the drying air inlet box body is fixedly connected with the air inlet pipe and communicated with the air inlet pipe.
7. The apparatus for liquefied preparation of edible carbon dioxide as claimed in claim 5, wherein the distillation drum further comprises a condensing mechanism and a condensing spiral pipe; the condensation mechanism is arranged outside the main cylinder; the main cylinder is also provided with a condensation inlet pipe and a condensation outlet pipe; the condensation spiral pipe is arranged in the condensation taper sleeve and is positioned in the condensation taper sleeve far away from the bottom-sealed tank body; one end of the condensation spiral pipe is connected and communicated with the condensation inlet pipe; the other end of the condensation spiral pipe is connected and communicated with the condensation outlet pipe; the condensation mechanism is used for refrigerating, and is connected and communicated with the condensation spiral pipe through a condensation inlet pipe and a condensation outlet pipe.
8. The edible carbon dioxide liquefaction preparation device as claimed in claim 5, wherein the distillation cylinder further comprises a heat transfer pipe, one end of the heat transfer pipe is installed in the bottom-sealed tank body, and the other end of the heat transfer pipe is arranged in the condensation taper sleeve and is positioned in the condensation taper sleeve close to the bottom-sealed tank body; the heat transfer pipe is provided with a connecting section, a heat conducting section and a heat transfer section; one end of the connecting section is connected with the heat conducting section, and the other end of the connecting section is connected with the heat transferring section; the heat conduction section is arranged in the back cover tank body; the heat transfer section is arranged in the condensation taper sleeve close to the bottom sealing tank body.
9. The device for preparing edible carbon dioxide by liquefaction according to claim 8, wherein the heat conducting section is in a conical tower shape, and the heat conducting section is internally provided with at least one honeycomb structure; the heat transfer section is provided with at least one heat radiating fin.
10. The apparatus for liquefied preparation of edible carbon dioxide as claimed in claim 8, further comprising a collecting pipe disposed in the distillation column for collecting the liquid droplets formed on the condensation cone.
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| CN202210794778.9A CN115072722B (en) | 2022-07-05 | 2022-07-05 | Edible carbon dioxide liquefaction preparation method and device thereof |
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| CN101040674A (en) * | 2007-04-29 | 2007-09-26 | 湖南凯美特气体有限公司 | Method for producing food level liquid carbon dioxide product |
| CN104654739A (en) * | 2015-02-02 | 2015-05-27 | 河南心连心深冷能源股份有限公司 | Device and method for preparing food-grade liquid carbon dioxide by rectification and purification with double towers |
| CN109163504A (en) * | 2018-10-11 | 2019-01-08 | 欧中电子材料（重庆）有限公司 | The preparation process and device of electronics grade carbon-dioxide |
| CN112357923A (en) * | 2020-11-10 | 2021-02-12 | 杨意斌 | Production process and device of high-purity liquid carbon dioxide |
| CN214620294U (en) * | 2021-09-26 | 2021-11-05 | 河南心连心深冷能源股份有限公司 | Device for producing industrial grade and food grade carbon dioxide by adopting double-tower rectification |
-
2022
- 2022-07-05 CN CN202210794778.9A patent/CN115072722B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040674A (en) * | 2007-04-29 | 2007-09-26 | 湖南凯美特气体有限公司 | Method for producing food level liquid carbon dioxide product |
| CN104654739A (en) * | 2015-02-02 | 2015-05-27 | 河南心连心深冷能源股份有限公司 | Device and method for preparing food-grade liquid carbon dioxide by rectification and purification with double towers |
| CN109163504A (en) * | 2018-10-11 | 2019-01-08 | 欧中电子材料（重庆）有限公司 | The preparation process and device of electronics grade carbon-dioxide |
| CN112357923A (en) * | 2020-11-10 | 2021-02-12 | 杨意斌 | Production process and device of high-purity liquid carbon dioxide |
| CN214620294U (en) * | 2021-09-26 | 2021-11-05 | 河南心连心深冷能源股份有限公司 | Device for producing industrial grade and food grade carbon dioxide by adopting double-tower rectification |
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