CN218465722U - Alcohol gas recovery system for fuel ethanol - Google Patents
Alcohol gas recovery system for fuel ethanol Download PDFInfo
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- CN218465722U CN218465722U CN202222459183.6U CN202222459183U CN218465722U CN 218465722 U CN218465722 U CN 218465722U CN 202222459183 U CN202222459183 U CN 202222459183U CN 218465722 U CN218465722 U CN 218465722U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The application relates to the biological fermentation equipment field of synthetic gas, especially relates to a wine gas recovery system of fuel ethanol for absorb the wine gas liquid in the nitrogen gas replacement system of nitrogen gas replacement system, recovery system includes: the ethanol temporary storage tank is connected with the gas outlet end of the nitrogen displacement system; the wine gas treatment unit comprises a wine gas conveying pipe and a wine gas washing tank, wherein the gas inlet end of the wine gas conveying pipe is connected with the gas outlet end of the ethanol temporary storage tank, and the gas outlet end of the wine gas conveying pipe is arranged in the wine gas washing tank; the tail gas treatment unit is connected with the gas outlet end of the wine gas washing tank; the wine gas treatment unit comprising the wine gas conveying pipe and the wine gas washing box is arranged at the gas outlet end of the nitrogen gas replacement system, so that residual wine gas enters the wine gas washing box through the wine gas conveying pipe under the action of the nitrogen gas replacement system, and is fully absorbed by water, and then the wine gas is fully recovered through the wine gas treatment part, and the wine gas in the nitrogen gas replacement system is prevented from forming a liquid seal.
Description
Technical Field
The application relates to the field of biological fermentation equipment for synthesis gas, in particular to a liquor gas recovery system for fuel ethanol.
Background
With the increasing demand of fuel ethanol, the rapid development of ethanol gasoline has been very slow, and currently, fuel ethanol is mainly prepared by a syngas biological fermentation method, which is a new fermentation technology, wherein specific microbial strains (such as clostridium ethanolate) are adopted to convert carbon monoxide into compounds such as ethanol by the self biological metabolism in a bioreactor by using carbon monoxide, hydrogen and the like in industrial tail gas or biomass synthesis gas as carbon sources and energy sources.
In the process of producing fuel ethanol by using industrial tail gas or biomass synthesis gas through a biological fermentation method, SO (SO) can be generated in the fermentation link 2 、SO 3 、NO 2 And CO 2 When acid gases are removed through a negative pressure system of a distillation dehydration working section at present, but the fluctuation of the deacidification effect is large, the pH value of the product is low, unqualified products are easy to produce, and if the acid gases are directly treated by adopting a nitrogen displacement system, along with the increase of the system operation time, wine gas liquid brought out by the gases is gathered in a pipeline to form a liquid seal phenomenon in the gas displacement process, the subsequent nitrogen displacement effect is influenced, and the pH value of fuel ethanol is further influenced; therefore, how to provide a recycling system for controlling the alkalinity of the glycolic acid of the fuel so as to avoid the liquid seal phenomenon generated in the nitrogen replacement stage.
Disclosure of Invention
The application provides a wine gas recovery system of fuel ethanol to solve the technical problem that the liquid seal phenomenon is easily generated in the nitrogen replacement stage in the prior art.
In a first aspect, the present application provides a alcohol recovery system for fuel ethanol for absorbing alcohol liquid in a nitrogen displacement system, the recovery system comprising:
the gas inlet end of the ethanol temporary storage tank is connected with the gas outlet end of the nitrogen displacement system;
the alcohol gas treatment unit comprises an alcohol gas conveying pipe and an alcohol gas washing tank, wherein the air inlet end of the alcohol gas conveying pipe is connected with the air outlet end of the ethanol temporary storage tank, and the air outlet end of the alcohol gas conveying pipe is arranged in the alcohol gas washing tank;
and the air inlet end of the tail gas treatment unit is connected with the air outlet end of the wine gas washing tank.
Optionally, the wine gas processing unit still includes sediment pump and shower head, the inlet of sediment pump is connected the bottom of wine gas washing case, the liquid outlet of sediment pump communicates the shower head, the shower head is located the top of wine gas washing case to realize the abundant absorption of liquid to wine gas in the wine gas washing case.
Optionally, the wine gas processing unit further comprises a conveying pipeline, and a liquid inlet of the conveying pipeline is communicated with a liquid outlet of the bottom material pump.
Optionally, the wine gas processing unit still includes level gauge and control valve, the level gauge is located the inner wall of wine gas washing case, the level gauge passes through electric signal connection the control valve, the control valve is located on the pipeline.
Optionally, the recycling system further includes: and the liquid inlet end of the rectifying tower is communicated with the liquid outlet of the conveying pipeline.
Optionally, the tail gas treatment unit comprises a gas-liquid separation tank, the gas inlet end of the gas-liquid separation tank is connected with the gas outlet end of the wine-gas washing tank, and the liquid outlet end of the gas-liquid separation tank is communicated with the liquid inlet end of the wine-gas washing tank.
Optionally, the tail gas processing unit includes the draught fan, the inlet end of draught fan is connected the end of giving vent to anger of gas-liquid separation jar to the realization is discharged the tail gas of separating.
Optionally, the liquid outlet end of the gas-liquid separation tank and the gas outlet end of the wine gas conveying pipe are consistent in distance from the bottom of the wine gas washing tank, and the liquid outlet end of the gas-liquid separation tank and the gas outlet end of the wine gas conveying pipe are both located below the lowest liquid level of the wine gas washing tank.
Optionally, the ethanol temporary storage tank comprises a gas distributor, and the gas inlet end of the gas distributor is communicated with the gas outlet end of the nitrogen displacement system.
Optionally, the nitrogen gas replacement system comprises a nitrogen gas supply pipeline and a manual ball valve, and an air outlet end of the nitrogen gas supply pipeline is connected with the ethanol temporary storage tank.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the embodiment of the application provides a wine gas recovery system of fuel ethanol, realize connecing of the wine gas liquid seal phenomenon in nitrogen gas replacement system to fuel ethanol and remove, compare with the ordinary ammonia gas replacement system that adopts among the prior art, can effectively reduce fuel ethanol because of the wine gas that the nitrogen gas replacement produced, avoid wine gas to form the liquid seal and influence the quality of fuel ethanol product, set up the wine gas processing unit including wine gas conveyer pipe and wine gas washing case through the end of giving vent to anger at nitrogen gas replacement system, make nitrogen gas replacement system keep in the jar after the acid gas of ethanol solution is exhausted to the greatest extent, remaining wine gas gets into the wine gas washing case through the wine gas conveyer pipe under nitrogen gas replacement system's effect, thereby it is abundant by water absorption, the acid gas that discharges simultaneously also is by water absorption part, final water-insoluble tail gas is discharged after the processing of tail gas processing unit, and then fully retrieve wine gas through the wine gas processing portion that sets up, avoid wine gas to form the liquid seal in the nitrogen gas replacement system.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a recovery system and a nitrogen displacement system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating the operational logic of a recycling system according to an embodiment of the present disclosure;
FIG. 3 is a graph illustrating the acidity and alkalinity of fuel ethanol as a function of time during the use of a recovery system according to an embodiment of the present disclosure;
the system comprises a nitrogen replacement system 1, a nitrogen supply pipeline 11, a manual ball valve 12, an ethanol temporary storage tank 2, a gas distributor 21, a wine gas treatment unit 3, a wine gas conveying pipe 31, a wine gas washing tank 32, a bottom material pump 33, a spray header 34, a conveying pipeline 35, a liquid level meter 36, a control valve 37, a tail gas treatment unit 4, a gas-liquid separation tank 41, an induced draft fan 42 and a rectifying tower 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present application are commercially available or can be prepared by an existing method.
As shown in fig. 1, the present embodiment provides a alcohol gas recovery system for fuel ethanol, which is used for absorbing alcohol gas liquid in a nitrogen substitution system 1, and the recovery system includes:
the gas inlet end of the ethanol temporary storage tank 2 is connected with the gas outlet end of the nitrogen displacement system 1;
the alcohol gas treatment unit 3 comprises an alcohol gas conveying pipe 31 and an alcohol gas washing tank 32, the air inlet end of the alcohol gas conveying pipe 31 is connected with the air outlet end of the ethanol temporary storage tank 2, and the air outlet end of the alcohol gas conveying pipe 31 is arranged in the alcohol gas washing tank 32;
and the gas inlet end of the tail gas treatment unit 4 is connected with the gas outlet end of the wine gas washing tank 32.
In some optional embodiments, the wine gas treatment unit 3 further includes a base material pump 33 and a spray header 34, an inlet of the base material pump 33 is connected to the bottom of the wine gas washing tank 32, an outlet of the base material pump 33 is communicated with the spray header 34, and the spray header 34 is arranged at the top of the wine gas washing tank 32 to realize sufficient absorption of the wine gas by the liquid in the wine gas washing tank 32.
In the embodiment of the application, through the collocation of base material pump 33 and shower head 34, can utilize base material pump 33 to turn into the liquid drop with the solution in the wine gas washing case 32 to fully absorb the wine gas that nitrogen gas was taken out through the form of liquid drop, cooperate wine gas washing case 32 to the abundant absorption of wine gas, thereby avoid in the nitrogen gas wine gas to form the liquid seal phenomenon.
In some optional embodiments, the wine gas treatment unit 3 further comprises a conveying pipe 35, and a liquid inlet of the conveying pipe 35 is communicated with a liquid outlet of the base material pump 33.
In the embodiment of the application, through the liquid outlet that sets up conveying pipeline 35 and connect bottom material pump 33, can discharge the solution in absorbing the wine gas washing case 32 that finishes through bottom material pump 33 to subsequent processing flow in, consequently can effectual recovery wine gas to form light wine product, avoid wine gas to form the liquid seal phenomenon.
In some optional embodiments, the wine gas treatment unit 3 further comprises a liquid level meter 36 and a control valve 37, the liquid level meter 36 is disposed on the inner wall of the wine gas washing tank 32, the liquid level meter 36 is connected to the control valve 37 through an electric signal, and the control valve 37 is disposed on the conveying pipeline 35.
In the embodiment of the application, through introducing level gauge 36 and control valve 37 in wine gas processing unit 3, utilize level gauge 36 to measure wine gas washing case 32's liquid level height, when reaching anticipated liquid level, the data of level gauge 36 is handled in the PLC of control valve 37 through the electric wire of laying, cable, wiFi signal or bluetooth signal with data transmission, make control valve 37 open, make the liquid in wine gas washing case 32 transport the flow of handling through pipeline 35, effectual recovery wine gas.
In some optional embodiments, the recycling system further comprises: and the liquid inlet end of the rectifying tower 5 is communicated with the liquid outlet of the conveying pipeline 35.
In the embodiment of the application, the rectifying tower 5 is arranged in the control recovery system, and when the nitrogen replacement system 1 replaces the acidic gas in the fuel ethanol, part of the acidic gas can be dissolved in water, so that impurities are contained in the alcohol water washing tank 32, and the aqueous solution formed by the part of the acidic gas is different from the solubility of the alcohol gas, so that the part of the acidic gas dissolved in the water can be separated from the alcohol gas through the rectifying tower 5, a light alcohol product is obtained, and the effective recovery of the alcohol gas is realized.
In some optional embodiments, the tail gas treatment unit 4 includes a gas-liquid separation tank 41, an air inlet end of the gas-liquid separation tank 41 is connected to the air outlet end of the wine gas washing water tank 32, and an outlet end of the gas-liquid separation tank 41 is communicated with the liquid inlet end of the wine gas washing water tank 32.
In the embodiment of the present application, the gas-liquid separation tank 41 is designed in the tail gas treatment unit 4, the gas of the nitrogen gas replacement system 1 passing through the wine gas washing water tank is treated by using the gas-liquid separation tank 41, and the treated liquid phase returns to the wine gas washing water tank 32, so that the effective recovery of the wine gas is ensured.
In some optional embodiments, the tail gas treatment unit 4 includes an induced draft fan 42, and an air inlet end of the induced draft fan 42 is connected to an air outlet end of the gas-liquid separation tank 41, so as to discharge the separated tail gas.
In the embodiment of this application, control tail gas unit still includes draught fan 42, can not only take out the gaseous phase in the gas-liquid separation jar 41 and arrange to the atmosphere in, can also promote the work efficiency of nitrogen gas replacement system 1 through draught fan 42 for the absorption of wine gas, and then the pH valve of fuel ethanol deacidification effect in order to control.
In some optional embodiments, the liquid outlet end of the gas-liquid separation tank 41 and the gas outlet end of the wine gas conveying pipe 31 are at the same distance from the bottom of the wine gas washing tank 32, and the liquid outlet end of the gas-liquid separation tank 41 and the gas outlet end of the wine gas conveying pipe 31 are both located below the lowest liquid level of the wine gas washing tank 32.
In the embodiment of the present application, the port distance between the gas-liquid separation tank 41 and the wine gas conveying pipe 31 is controlled below the lowest liquid level of the wine gas washing tank 32, and the port position of the extending port of the wine gas conveying pipe 31 ensures that the gas discharged from the nitrogen gas replacement system 1 flows through the whole product sufficiently, so that the nitrogen gas replacement is sufficient.
In some optional embodiments, the ethanol temporary storage tank 2 comprises a gas distributor 21, and the gas inlet end of the gas distributor 21 is communicated with the gas outlet end of the nitrogen substitution system 1.
In the embodiment of the application, set up gas distributor 21 in ethanol is kept in storage tank 2 temporarily, utilize gas distributor 21 to make the gaseous even fuel ethanol product that lets in ethanol is kept in storage tank 2 temporarily of letting in of nitrogen gas replacement system 1, guarantee nitrogen gas with the acid gas replacement play where, and then guarantee that the pH value of fuel ethanol accords with the expectation.
In some optional embodiments, the nitrogen substitution system 1 comprises a nitrogen supply pipe 11 and a manual ball valve 12, and an air outlet end of the nitrogen supply pipe 11 is connected with the ethanol temporary storage tank 2.
In the embodiment of the application, through setting up nitrogen gas replacement system 1 including nitrogen gas supply pipeline 11 and manual ball valve 12, utilize the pressure size of nitrogen gas in the manual ball valve 12 control nitrogen gas supply pipeline 11, guarantee that the pressure size of ethanol scratch tank 2 is in this within range of 0.3MPa ~ 0.6MPa among the nitrogen gas entering recovery system to guarantee that nitrogen gas is abundant replaced the acid gas in ethanol scratch tank 2, guarantee that the pH value of fuel ethanol accords with the expectation.
In conclusion, through the recovery system of this application, on the one hand can retrieve the wine gas that nitrogen gas replacement system 1 brought out, avoid forming the liquid seal, guarantee that the pH value of fuel ethanol is in the expectation scope, on the other hand can also produce light wine product, realizes the effective utilization of wine gas, guarantees the yield of finished product wine.
The embodiment of the application provides a wine gas recovery system of fuel ethanol, the realization is to connecing of fuel ethanol in nitrogen gas replacement system 1 wine gas liquid seal phenomenon to be relieved, compare with the ordinary ammonia gas replacement system that adopts among the prior art, can effectively reduce the wine gas that fuel ethanol produced because of nitrogen gas replacement, avoid wine gas to form the liquid seal and influence the quality of fuel ethanol product, set up wine gas processing unit 3 including wine gas conveyer pipe 31 and wine gas washing case 32 through the end of giving vent to anger at nitrogen gas replacement system 1, make nitrogen gas replacement system 1 keep in the jar 2 interior alcohol solution's of ethanol acid gas exhaust completely, remaining wine gas passes through wine gas conveyer pipe 31 under nitrogen gas replacement system 1's effect and gets into in wine gas washing case 32, thereby it is abundant to be absorbed by water, the acid gas who discharges simultaneously also is partly absorbed by water, ultimate tail gas that is insoluble in water is discharged after tail gas processing unit 4 handles, and then fully retrieves wine gas through the wine gas processing portion that sets up, avoid wine gas to form the liquid seal in nitrogen gas replacement system 1.
Meanwhile, the recovery system is utilized to carry out actual measurement, and along with the change of the ventilation time of the nitrogen replacement system 1, the acidity and the pH value of the fuel ethanol in the ethanol temporary storage tank 2 are shown in the table 1.
TABLE 1
As can be seen from Table 1 and FIG. 3, the recovery system of the present application can effectively stabilize the efficiency of nitrogen gas replacement by using measures such as a gas distributor, a gas-liquid separation tank and an induced draft fan, and can effectively recover alcohol gas and control the pH value of fuel ethanol by matching with an alcohol gas treatment part.
Various embodiments of the application may exist in a range; it is to be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the application; accordingly, the described range descriptions should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, it is contemplated that the description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the stated range, such as 1, 2, 3, 4, 5, and 6, as applicable regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any number (fractional or integer) recited within the range so indicated.
In this document, 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. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
It should be noted that all directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "fixed" and the like are to be understood in a broad sense, and for example, "fixed" may be a fixed connection, a detachable connection, or an integral body, a mechanical connection, or an electrical connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fuel ethanol's wine gas recovery system for absorbing wine gas liquids in a nitrogen substitution system (1) of a nitrogen substitution system (1), the recovery system comprising:
the gas inlet end of the ethanol temporary storage tank (2) is connected with the gas outlet end of the nitrogen displacement system (1);
the alcohol gas treatment unit (3) comprises an alcohol gas conveying pipe (31) and an alcohol gas washing tank (32), the air inlet end of the alcohol gas conveying pipe (31) is connected with the air outlet end of the ethanol temporary storage tank (2), and the air outlet end of the alcohol gas conveying pipe (31) is arranged in the alcohol gas washing tank (32) so as to treat the alcohol gas and maintain the stability of the alkalinity of the glycolic acid of the fuel;
and the air inlet end of the tail gas treatment unit (4) is connected with the air outlet end of the wine gas washing tank (32).
2. The recycling system of claim 1, wherein the wine gas treatment unit (3) further comprises a bottom material pump (33) and a spray header (34), wherein a liquid inlet of the bottom material pump (33) is connected with the bottom of the wine gas water washing tank (32), a liquid outlet of the bottom material pump (33) is communicated with the spray header (34), and the spray header (34) is arranged at the top of the wine gas water washing tank (32) so as to realize the sufficient absorption of the liquid in the wine gas water washing tank (32) to the wine gas.
3. A recovery system according to claim 2, wherein the liquor gas treatment unit (3) further comprises a transfer duct (35), a liquid inlet of the transfer duct (35) being in communication with a liquid outlet of the base pump (33).
4. A recovery system as claimed in claim 3, characterized in that said wine gas treatment unit (3) further comprises a level meter (36) and a control valve (37), said level meter (36) being arranged on the inner wall of said wine gas washing tank (32), said level meter (36) being connected to said control valve (37) by an electric signal, said control valve (37) being arranged on said delivery duct (35).
5. A recycling system according to claim 3, further comprising: the liquid inlet end of the rectifying tower (5) is communicated with the liquid outlet of the conveying pipeline (35).
6. The recycling system according to claim 1, wherein the tail gas treatment unit (4) comprises a gas-liquid separation tank (41), the gas inlet end of the gas-liquid separation tank (41) is connected with the gas outlet end of the wine-gas water washing tank (32), and the liquid outlet end of the gas-liquid separation tank (41) is communicated with the liquid inlet end of the wine-gas water washing tank (32).
7. The recovery system according to claim 6, wherein the tail gas treatment unit (4) comprises an induced draft fan (42), and the gas inlet end of the induced draft fan (42) is connected with the gas outlet end of the gas-liquid separation tank (41) so as to discharge the separated tail gas.
8. The recycling system according to claim 6, wherein the outlet end of the gas-liquid separation tank (41) and the outlet end of the wine gas conveying pipe (31) are at the same distance from the bottom of the wine gas washing tank (32), and the outlet end of the gas-liquid separation tank (41) and the outlet end of the wine gas conveying pipe (31) are both located below the lowest liquid level of the wine gas washing tank (32).
9. The recovery system according to claim 1, wherein the ethanol temporary storage tank (2) comprises a gas distributor (21), and the gas inlet end of the gas distributor (21) is communicated with the gas outlet end of the nitrogen displacement system (1).
10. A recovery system according to claim 1 or 9, characterized in that the nitrogen displacement system (1) comprises a nitrogen supply line (11) and a manual ball valve (12), the outlet end of the nitrogen supply line (11) being connected to the ethanol buffer tank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222459183.6U CN218465722U (en) | 2022-09-16 | 2022-09-16 | Alcohol gas recovery system for fuel ethanol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222459183.6U CN218465722U (en) | 2022-09-16 | 2022-09-16 | Alcohol gas recovery system for fuel ethanol |
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| Publication Number | Publication Date |
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| CN218465722U true CN218465722U (en) | 2023-02-10 |
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| CN202222459183.6U Active CN218465722U (en) | 2022-09-16 | 2022-09-16 | Alcohol gas recovery system for fuel ethanol |
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- 2022-09-16 CN CN202222459183.6U patent/CN218465722U/en active Active
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