CN113521961A - Ultra-clean high-purity absolute ethyl alcohol extraction device - Google Patents
Ultra-clean high-purity absolute ethyl alcohol extraction device Download PDFInfo
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- CN113521961A CN113521961A CN202110886075.4A CN202110886075A CN113521961A CN 113521961 A CN113521961 A CN 113521961A CN 202110886075 A CN202110886075 A CN 202110886075A CN 113521961 A CN113521961 A CN 113521961A
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- adsorption tower
- cooling
- piece
- molecular sieve
- ethanol
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000000605 extraction Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 238000001179 sorption measurement Methods 0.000 claims abstract description 57
- 239000002808 molecular sieve Substances 0.000 claims abstract description 29
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 6
- 235000019441 ethanol Nutrition 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000005192 partition Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002481 ethanol extraction Methods 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000003204 osmotic effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000000895 extractive distillation Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000010533 azeotropic distillation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/116—Molecular sieves other than zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Abstract
The invention discloses an ultra-clean high-purity absolute ethanol extraction device, which comprises an adsorption tower, wherein the top of the adsorption tower is provided with an air inlet, the bottom of the adsorption tower is provided with an air outlet, a screening piece is arranged in the adsorption tower, the screening piece can control the path pair of the ethanol steam to enter, so that the ethanol steam can flow along a first partition plate and a third partition plate, the ethanol steam can circulate along an S shape to be completely reacted with molecular sieve particles, the problems that the ethanol is not fully contacted with the molecular sieve particles due to the straight line shape in the prior art and the water removal effect is influenced are solved, the water removal quality is effectively improved, in addition, the temperature is increased due to the fact that the ethanol steam is reacted with the molecular sieve to generate heat during the reaction of a cooling piece and a circulating piece, the adsorption quantity of the molecular sieve to water is reduced, and after the molecular sieve is cooled externally, the use circulation will carry out the reciprocating motion to it, make its cooling that can be abundant even, guaranteed to improve the efficiency of molecular sieve dewatering.
Description
Technical Field
The invention relates to the technical field of absolute ethyl alcohol extraction, in particular to an ultra-clean high-purity absolute ethyl alcohol extraction device.
Background
Absolute Ethanol (Ethanol absolute) refers to an Ethanol aqueous solution with high purity, and generally, an Ethanol solution with a concentration of 99.5% is generally called absolute Ethanol, and the absolute Ethanol is a mixture of Ethanol and water.
The absolute ethyl alcohol production is mainly carried out by adopting a molecular sieve method, a small factory adopts extractive distillation or azeotropic distillation, a part of factories adopts an osmotic membrane for treatment, the extractive distillation is highest in energy consumption, the osmotic method is lower, the osmotic membrane is generally not used for large-scale production, domestic absolute ethyl alcohol manufacturers are more, the content is generally 99.5 percent and 99.7 percent, absolute pure absolute ethyl alcohol to be prepared needs to be improved through equipment, purification, gasification and impurity removal to enable the content to reach 99.99 percent, other technical indexes reach import high-purity ultra-clean absolute ethyl alcohol extraction, the equipment for original absolute ethyl alcohol production is improved, and high-filler automatic control is realized.
When impurities are removed, the two towers are used for distilling and adding the molecular sieve to produce the anhydrous ethanol, the ethanol in the regenerated airflow is recovered in the distillation tower, and the two towers are directly connected with the molecular sieve for dehydration after the flow of the two towers, however, in the process of dehydrating the molecular sieve, the adsorption capacity of the molecular sieve to water is reduced along with the increase of the temperature, the water absorption effect of the molecular sieve is influenced, and the flow direction of the vaporized ethanol introduced into the molecular sieve is linear, so that the ethanol is not fully contacted with the molecular sieve, and the content of removed water is reduced. Therefore, an ultra-clean high-purity absolute ethyl alcohol extraction device is provided.
Disclosure of Invention
The invention aims to provide an ultra-clean high-purity absolute ethyl alcohol extraction device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an ultraclean high-purity absolute ethyl alcohol extraction element, includes the adsorption tower, the top of adsorption tower is equipped with the air inlet, just the bottom of adsorption tower is equipped with the gas outlet, be equipped with branch sieve spare in the adsorption tower, divide the sieve spare to be used for moving along certain route to make it carry out abundant reaction with the molecular sieve granule in removing, the outside of adsorption tower is equipped with the pipeline, be equipped with the cooling piece between pipeline and the adsorption tower, the heat that its reaction produced is taken away in the reaction is carried out with ethanol to the cooling piece, one side of cooling piece is equipped with the circulation piece, the circulation piece carries out reciprocating lift removal to the cooling piece, realizes evenly cooling to the adsorption tower ambient temperature.
Preferably, the separating sieve comprises a plurality of groups of first separating plates, second separating plates and third separating plates which are arranged in the adsorption tower, filtering holes are formed in the first separating plates and the third separating plates, the second separating plates are arranged between the first separating plates and the third separating plates, and the second separating plates are used for controlling the flow path of the ethanol steam to fully react and obviously remove moisture.
Preferably, the cooling piece is including installing the cooling shell in the adsorption tower outside, the pipe-line mounting is in the cooling shell, and one side of cooling shell is equipped with the water tank, one side of water tank is equipped with first water pump, the one end intercommunication of first water pump is in the pipeline bottom, the one end of first water pump is connected on the water tank, one side of water tank is equipped with the second water pump, the top at the water pipe is connected to the one end of second water pump, the one end that the water pipe was kept away from to the second water pump is connected in the water tank, be equipped with multiunit cooling head on the water pipe, the cooling head is used for increasing the area of contact with the adsorption tower, one side of water tank is equipped with compressor, just be equipped with electric contact between cooling shell and the adsorption tower, can cool down the temperature rising that molecular sieve granule and ethanol reaction produced, guarantee its dewatering effect.
Preferably, the pipe is threaded so as to increase the contact area.
Preferably, the circulation piece is including installing the motor in cooling shell one side, the output of motor is connected with the connecting rod, be connected with two sets of cams on the connecting rod, be equipped with the ejector pin on the cam, one side of cooling shell is equipped with the fixed plate, the ejector pin passes fixed plate and water pipe swing joint, just be equipped with the gag lever post between cooling shell and the water pipe for it steadily circulates and reciprocates.
Preferably, the cam is provided with a track, the ejector rod is provided with a first roller, the first roller is matched with the track, the abrasion of the cam can be reduced, and the service life of the cam can be prolonged.
Preferably, a spring is arranged between the jacking rod and the fixed plate.
Preferably, a second roller is arranged between the adsorption towers of the cooling head, so that the second roller can be tightly attached to the outer wall of the adsorption tower and does not influence the up-and-down movement of the pipeline
Preferably, the ratio of the height to the diameter of the adsorption tower is as follows, and the gas velocity of the adsorption tower is set to be-m/s, so that the flow velocity is fastest.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the path pair of the ethanol steam entering can be controlled through the arranged screening piece, so that the ethanol steam flows along the first partition plate and the third partition plate, and flows along the S shape, so that the ethanol steam can completely react with the molecular sieve particles, the problems that the ethanol is not fully contacted with the molecular sieve particles due to the existing straight line shape and the dewatering effect is influenced are solved, and the dewatering quality is effectively improved.
2. According to the invention, during the reaction, the temperature is raised due to the reaction of the ethanol steam and the molecular sieve to generate heat, so that the adsorption capacity of the molecular sieve to water is reduced, and after the molecular sieve is cooled externally, the molecular sieve is circulated to move back and forth, so that the molecular sieve can be cooled fully and uniformly, and the efficiency of molecular sieve dewatering is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of an adsorption column of the present invention;
FIG. 3 is a schematic sectional view of an adsorption column according to the present invention;
FIG. 4 is a schematic cross-sectional view of an integral portion of the present invention;
FIG. 5 is a schematic cross-sectional view of a cooling housing according to the present invention;
FIG. 6 is a schematic view of the piping structure of the present invention;
FIG. 7 is a partial structural view of the circulating member of the present invention.
In the figure: 1-an adsorption column; 2-an air inlet; 3-air outlet; 4-screening the components; 41-a first divider plate; 42-a second divider panel; 43-a third divider; 44-filtration pores; 5-a pipeline; 6-cooling; 61-cooling the shell; 62-a water tank; 63-a first water pump; 64-a second water pump; 65-cooling head; 651-second roller; 66-a refrigeration compressor; 67-electric contact thermometer; 7-a circulating member; 71-a motor; 72-a connecting rod; 73-cam; 731-track; 74-jack rod; 741 — a first roller; 75-a fixed plate; 751-a spring; 76-limiting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides an ultraclean high-purity absolute ethyl alcohol extraction element, includes adsorption tower 1, the top of adsorption tower 1 is equipped with air inlet 2, just the bottom of adsorption tower 1 is equipped with gas outlet 3, be equipped with branch sieve spare 4 in the adsorption tower 1, divide sieve spare 4 to be used for moving along certain route to make it carry out abundant reaction with the molecular sieve granule in removing, the outside of adsorption tower 1 is equipped with pipeline 5, be equipped with cooling piece 6 between pipeline 5 and the adsorption tower 1, cooling piece 6 takes away the heat that its reaction produced in the molecular sieve granule reacts with ethanol, one side of cooling piece 6 is equipped with circulation piece 7, circulation piece 7 carries out reciprocating lift to cooling piece 6 and removes, realizes evenly cooling to adsorption tower 1 surrounding temperature.
The screening device 4 comprises a plurality of groups of first partition plates 41, second partition plates 42 and third partition plates 43 which are arranged in the adsorption tower 1, 44-filtering holes 44 are arranged on the first partition plates 41 and the third partition plates 43, the second partition plates 42 are arranged between the first partition plates 41 and the third partition plates 43, the second partition plates 42 are used for controlling the flow path of the ethanol steam, so that the ethanol steam enters from the inlet of the adsorption tower 1 and flows into the third partition plates 43 from the other ends of the ethanol steam for circulation due to the blocking effect of the second partition plates 42 after flowing through the first partition plates 41, and the flow path is S-shaped, so that the circulated ethanol steam can be fully reacted, and the moisture removal is obvious.
The cooling part 6 comprises a cooling shell 61 installed outside the adsorption tower 1, the pipeline 5 is installed in the cooling shell 61, a water tank 62 is arranged on one side of the cooling shell 61, a first water pump 63 is arranged on one side of the water tank 62, one end of the first water pump 63 is communicated with the bottom of the pipeline 5, one end of the first water pump 63 is connected onto the water tank 62, a second water pump 64 is arranged on one side of the water tank 62, one end of the second water pump 64 is connected onto the top of a water pipe, one end, far away from the water pipe, of the second water pump 64 is connected into the water tank 62, a plurality of groups of cooling heads 65 are arranged on the water pipe, the cooling heads 65 are used for increasing the contact area with the adsorption tower 1, a refrigeration compressor 66 is arranged on one side of the water tank 62, an electric contact thermometer 67 is arranged between the cooling shell 61 and the adsorption tower 1, a cooling agent is added into the water tank 62, so that the temperature of the cooling shell can be reduced, and when the moisture in the water pipe carries out continuous exchange through the circulation effect of first water pump 63 and second water pump 64 to the refrigeration compressor 66 that uses in coordination carries out refrigeration effect to it, thereby can reduce the temperature rise that molecular sieve granule and ethanol reaction produced, guarantees its dewatering effect.
The pipeline 5 is in a threaded shape, so that the contact area is increased conveniently, and the cooling treatment is facilitated.
The cam 73 is provided with a rail 731, the ejector rod 74 is provided with a first roller 741, the first roller 741 is matched with the rail 731 and becomes sliding friction, abrasion of the cam 73 can be reduced, and the service life of the cam 73 can be prolonged.
A spring 751 is arranged between the pushing rod 74 and the fixed plate 75, and the spring 751 has certain elasticity, so that the spring 751 has buffering and rebounding functions and reduces the vibration of the water pipe.
And a second roller 651 is arranged between the cooling head 65 and the adsorption tower 1, so that the second roller 651 can be tightly attached to the outer wall of the adsorption tower 1 and the pipeline 5 is not influenced to move up and down.
The height to diameter ratio of the adsorption tower 1 is 2:3, the gas velocity of the adsorption tower 1 is set to be 0.05-0.20m/s, the velocity of the adsorption tower 1 determines the diameter of the tower body, and the flow velocity in the tower, the two-phase contact time between the fluid and the filler, the fluid resistance and the like are determined under a certain filling amount, so that the penetration speed is higher when the ratio is 2: 3.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides an ultra-clean high-purity absolute ethyl alcohol extraction element, includes adsorption tower (1), the top of adsorption tower (1) is equipped with air inlet (2), just the bottom of adsorption tower (1) is equipped with gas outlet (3), its characterized in that: a screening piece (4) is arranged in the adsorption tower (1), and the screening piece (4) is used for moving along a certain path and enabling the screening piece to fully react with molecular sieve particles in the moving process;
a pipeline (5) is arranged on the outer side of the adsorption tower (1), a cooling piece (6) is arranged between the pipeline (5) and the adsorption tower (1), and the cooling piece (6) takes away heat generated by the reaction of the molecular sieve particles and ethanol in the reaction;
one side of cooling piece (6) is equipped with circulation piece (7), circulation piece (7) carry out reciprocating motion to cooling piece (6), realize evenly cooling adsorption tower (1) ambient temperature.
2. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 1, wherein: the separating sieve (4) comprises a plurality of groups of first separating plates (41), second separating plates (42) and third separating plates (43) which are arranged in the adsorption tower (1), 44-filtering holes (44) are formed in the first separating plates (41) and the third separating plates (43), the second separating plates (42) are arranged between the first separating plates (41) and the third separating plates (43), and the second separating plates (42) are used for controlling the flow path of ethanol steam.
3. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 1, wherein: the cooling part (6) comprises a cooling shell (61) arranged on the outer side of the adsorption tower (1), the pipeline (5) is arranged in the cooling shell (61), a water tank (62) is arranged on one side of the cooling shell (61), a first water pump (63) is arranged on one side of the water tank (62), one end of the first water pump (63) is communicated with the bottom of the pipeline (5), one end of the first water pump (63) is connected to the water tank (62), a second water pump (64) is arranged on one side of the water tank (62), one end of the second water pump (64) is connected to the top of the pipeline (5), one end, far away from a water pipe, of the second water pump (64) is connected into the water tank (62), a plurality of groups of cooling heads (65) are arranged on the water pipe, and the cooling heads (65) are used for increasing the contact area with the adsorption tower (1);
one side of the water tank (62) is provided with a refrigeration compressor (66), and an electric contact thermometer (67) is arranged between the cooling shell (61) and the adsorption tower (1).
4. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 1, wherein: the pipe (5) is threaded.
5. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 1, wherein: circulation piece (7) are including installing motor (71) in cooling shell (61) one side, the output of motor (71) is connected with connecting rod (72), be connected with two sets of cams (73) on connecting rod (72), be equipped with on cam (73) and be equipped with ejector rod (74), one side of cooling shell (61) is equipped with fixed plate (75), ejector rod (74) pass fixed plate (75) and pipeline (5) swing joint, just be equipped with gag lever post (76) between cooling shell (61) and the water pipe for it steadily circulates and reciprocates.
6. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 5, wherein: a track (731) is formed in the cam (73), a first roller (741) is arranged on the jacking rod (74), and the first roller (741) is matched with the track (731).
7. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 5, wherein: a spring (751) is arranged between the jacking rod (74) and the fixed plate (75).
8. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 3, wherein: and a second roller (651) is arranged between the cooling head (65) and the adsorption tower (1).
9. The apparatus for extracting ultra-clean high-purity anhydrous ethanol as claimed in claim 1, wherein: the ratio of the height to the diameter of the adsorption tower (1) is 2:3, and the gas velocity of the adsorption tower (1) is set to be 0.05-0.20 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110886075.4A CN113521961A (en) | 2021-08-03 | 2021-08-03 | Ultra-clean high-purity absolute ethyl alcohol extraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110886075.4A CN113521961A (en) | 2021-08-03 | 2021-08-03 | Ultra-clean high-purity absolute ethyl alcohol extraction device |
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| Publication Number | Publication Date |
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| CN113521961A true CN113521961A (en) | 2021-10-22 |
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|---|---|---|---|
| CN202110886075.4A Pending CN113521961A (en) | 2021-08-03 | 2021-08-03 | Ultra-clean high-purity absolute ethyl alcohol extraction device |
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2021
- 2021-08-03 CN CN202110886075.4A patent/CN113521961A/en active Pending
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| CN205948857U (en) * | 2016-07-08 | 2017-02-15 | 深圳坤易泰建材有限公司 | Reation kettle cooling system |
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| CN208340176U (en) * | 2018-03-16 | 2019-01-08 | 广东新华粤石化集团股份公司 | A kind of novel bicyclic pentadiene dehydration refining system |
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Application publication date: 20211022 |