CN113583822A - Device and method for strengthening biological fermentation of atmospheric gas source micro-interface - Google Patents
Device and method for strengthening biological fermentation of atmospheric gas source micro-interface Download PDFInfo
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/12—Bioreactors or fermenters specially adapted for specific uses for producing fuels or solvents
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
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- C12M27/18—Flow directing inserts
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
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- C12M39/00—Means for cleaning the apparatus or avoiding unwanted deposits of microorganisms
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
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- 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
Abstract
The invention provides a device for strengthening biological fermentation of a micro-interface of a normal-pressure gas source, which comprises a fermentation tank, wherein a backflow channel for backflow of fermentation raw materials is arranged on the side surface of the fermentation tank, a composite micro-interface generator is arranged in the backflow channel, the composite micro-interface generator comprises a pneumatic micro-interface generator and a hydraulic micro-interface generator, and the hydraulic micro-interface generator is connected with the pneumatic micro-interface generator through a communicating pipeline; the composite micro-interface generator is connected with a CO gas inlet pipeline; the bottom of the backflow channel is connected with a feeding pipeline for feeding fermentation raw materials into the fermentation tank. The top of the side wall of the fermentation tank is provided with the backflow channel, so that the utilization rate of fermentation raw materials is improved, and the waste of the fermentation raw materials is avoided; through being provided with the little interface unit of gas-liquid linkage formula for CO is absorbed more by fermentation raw materials more easily, has practiced thrift the resource in process of production.
Description
Technical Field
The invention belongs to the technical field of ethanol preparation, and particularly relates to a device and a method for strengthening biological fermentation of a normal-pressure gas source micro-interface.
Background
Ethanol is the fermentation industrial product with longest production history and the largest yield in the world at present. The industrialization of ethanol production begins at the end of the 19 th century and has been in the past for hundreds of years. It is widely used in food, chemical, medicine, dye, national defense and other industries, and is also an important clean resource, namely ethanol. The ethanol is absolute ethanol with the volume fraction of more than 99.5 percent, can be mixed with gasoline according to a certain proportion to reach mixed ethanol gasoline with different octane numbers, is a good component for octane number mixing, can also be combusted and oxygenated to be used as a component of a gasoline oxygenator, and E10 gasoline popularized and used in China is formed by mixing ethanol with the volume fraction of 10 percent and gasoline with the volume fraction of 90 percent, so that the ethanol serving as a clean resource can replace tetraethyl lead to be used as an explosion-proof agent of the gasoline and can also be used for manufacturing ethanol gasoline to be used as automobile fuel, and the pollution to the environment during the combustion of the gasoline is greatly reduced.
Methods for producing ethanol are classified into fermentation methods using plant-based substances as raw materials and chemical synthesis methods using petroleum-based substances as raw materials. The production of ethanol by fermentation is the largest industry in the current biological industry, and mainly utilizes starch raw materials such as corn, rice, sorghum, wheat and potatoes, sugar raw materials such as molasses and cellulose raw materials such as corncobs to prepare the ethanol by fermentation and distillation under the action of microorganisms.
In industrial production, at present, ethanol is mainly produced by adopting a fermentation method in China, namely, the ethanol is basically produced by adopting a starchy raw material, a sugar raw material or a cellulose raw material through a fermentation process. According to statistics, more than 95 percent of factories in China adopt a fermentation method to produce ethanol. With the development and increasing demand of edible and industrial ethanol, especially ethanol industry, the problem of raw material shortage is increasingly prominent, so that the domestic food supply is gradually tightened, the food shortage and the price are rapidly increased, and the national economic stability and the social stability harmony are influenced.
In the center of the prior art, a large amount of resources are consumed in the process of producing ethanol, the utilization rate of fermentation raw materials is low, and the waste of the fermentation raw materials is caused.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a device for strengthening biological fermentation of a normal-pressure gas source micro-interface, which is characterized in that a backflow channel is arranged at the top of the side wall of a fermentation tank, so that a fermentation product which is not completely reacted in the fermentation tank flows back to the bottom of the fermentation tank, the utilization rate of fermentation raw materials is improved, and the waste of the fermentation raw materials is avoided; the composite micro-interface generator is arranged in the backflow channel, so that CO is broken and dispersed into micron-sized bubbles, the mass transfer area of a phase boundary between the CO and the fermentation raw material is increased, the CO is more easily absorbed by the fermentation raw material, and resources are saved in the production process.
The second purpose of the invention is to provide a method using the device, which is simple and convenient to operate and saves resources.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a device for strengthening biological fermentation of a micro-interface of a normal-pressure gas source, which comprises a fermentation tank, wherein a backflow channel for backflow of fermentation raw materials is arranged on the side surface of the fermentation tank, a composite micro-interface generator is arranged in the backflow channel, the composite micro-interface generator comprises a pneumatic micro-interface generator and a hydraulic micro-interface generator, and the hydraulic micro-interface generator is connected with the pneumatic micro-interface generator through a communicating pipeline;
the composite micro-interface generator is connected with a CO gas inlet pipeline;
the bottom of the backflow channel is connected with a feeding pipeline for feeding fermentation raw materials into the fermentation tank.
In the prior art, when ethanol is produced by CO fermentation, the utilization rate of fermentation raw materials is low, and as the fermentation raw materials are grains, the growth cycle of the grains is longer, the waste is caused by the low utilization rate of the fermentation raw materials, and the domestic grain supply is directly influenced. Therefore, in the prior art, a large amount of resources are consumed by the reaction of CO and fermentation raw materials, and waste is caused on resources.
According to the invention, the reflux channel is arranged at the top of the side wall of the fermentation tank, so that the fermentation material which is not completely reacted in the fermentation tank is refluxed to the bottom of the fermentation tank, the utilization rate of fermentation raw materials is improved, and the waste of the fermentation raw materials is avoided; through being provided with gas-liquid linkage formula micro-interface unit in return channel inside, break the dispersion with CO and become micron order bubble, increase the phase boundary mass transfer area between CO and the fermentation raw materials for CO is more easily absorbed by the fermentation raw materials, has practiced thrift the resource in process of production.
The hydraulic micro-interface generator is arranged right above the pneumatic micro-interface generator, micron-sized bubbles on the pneumatic micro-interface generator can be blocked because most of fermentation raw materials contain crushed slag, when the pneumatic micro-interface generator is blocked, a CO gas inlet pipeline is closed to be connected with a gas valve of the pneumatic micro-interface generator, the pneumatic micro-interface generator is cleaned only by flushing the pneumatic micro-interface generator from top to bottom through the pipeline by gas in the hydraulic micro-interface generator and the fermentation raw materials, and after the blockage problem of the pneumatic micro-interface generator is solved, the gas valve of the CO gas inlet pipeline connected with the pneumatic micro-interface generator can be opened to enable the pneumatic micro-interface generator to work again.
In order to save resources, a gas valve and a circulating pump between the CO gas inlet pipeline and the hydraulic micro-interface generator can be closed or reduced during operation, and reaction materials and gases in the circulating pipeline can penetrate through the hydraulic micro-interface generator under the influence of gravity and negative pressure, so that the resources of CO conveyed to the hydraulic micro-interface generator and the circulating pump are saved.
Preferably, the pneumatic micro-interface generator is arranged right below the hydraulic micro-interface generator. The pneumatic micro-interface generator is arranged right below the hydraulic micro-interface generator, because fermentation raw materials possibly contain fine particles or residues, the pneumatic micro-interface generator can be blocked, when the pneumatic micro-interface generator is blocked, the gas valve connected with the pneumatic micro-interface generator is closed, the fermentation raw materials downward from the hydraulic micro-interface generator right above are used for flushing the inside of the pneumatic micro-interface generator, and the gas valve can be opened after the pneumatic micro-interface generator is flushed, so that the pneumatic micro-interface generator can normally work.
It will be appreciated by those skilled in the art that the micro-interface generator used in the present invention is described in the prior patents of the present inventor, such as the patents of application numbers CN201610641119.6, CN201610641251.7, CN201710766435.0, CN106187660, CN105903425A, CN109437390A, CN205833127U and CN 207581700U. The detailed structure and operation principle of the micro bubble generator (i.e. micro interface generator) is described in detail in the prior patent CN201610641119.6, which describes that "the micro bubble generator comprises a body and a secondary crushing member, wherein the body is provided with a cavity, the body is provided with an inlet communicated with the cavity, the opposite first end and second end of the cavity are both open, and the cross-sectional area of the cavity decreases from the middle of the cavity to the first end and second end of the cavity; the secondary crushing member is disposed at least one of the first end and the second end of the cavity, a portion of the secondary crushing member is disposed within the cavity, and an annular passage is formed between the secondary crushing member and the through holes open at both ends of the cavity. The micron bubble generator also comprises an air inlet pipe and a liquid inlet pipe. "the specific working principle of the structure disclosed in the application document is as follows: liquid enters the micro-bubble generator tangentially through the liquid inlet pipe, and gas is rotated at a super high speed and cut to break gas bubbles into micro-bubbles at a micron level, so that the mass transfer area between a liquid phase and a gas phase is increased, and the micro-bubble generator in the patent belongs to a pneumatic micro-interface generator.
In addition, the first patent 201610641251.7 describes that the primary bubble breaker has a circulation liquid inlet, a circulation gas inlet and a gas-liquid mixture outlet, and the secondary bubble breaker communicates the feed inlet with the gas-liquid mixture outlet, which indicates that the bubble breakers all need to be mixed with gas and liquid, and in addition, as can be seen from the following drawings, the primary bubble breaker mainly uses the circulation liquid as power, so that the primary bubble breaker belongs to a hydraulic micro-interface generator, and the secondary bubble breaker simultaneously introduces the gas-liquid mixture into an elliptical rotating ball for rotation, thereby realizing bubble breaking in the rotating process, so that the secondary bubble breaker actually belongs to a gas-liquid linkage micro-interface generator. In fact, the micro-interface generator is a specific form of the micro-interface generator, whether it is a hydraulic micro-interface generator or a gas-liquid linkage micro-interface generator, however, the micro-interface generator adopted in the present invention is not limited to the above forms, and the specific structure of the bubble breaker described in the prior patent is only one of the forms that the micro-interface generator of the present invention can adopt.
Furthermore, the prior patent 201710766435.0 states that the principle of the bubble breaker is that high-speed jet flows are used to achieve mutual collision of gases, and also states that the bubble breaker can be used in a micro-interface strengthening reactor to verify the correlation between the bubble breaker and the micro-interface generator; moreover, in the prior patent CN106187660, there is a related description on the specific structure of the bubble breaker, see paragraphs [0031] to [0041] in the specification, and the accompanying drawings, which illustrate the specific working principle of the bubble breaker S-2 in detail, the top of the bubble breaker is a liquid phase inlet, and the side of the bubble breaker is a gas phase inlet, and the liquid phase coming from the top provides the entrainment power, so as to achieve the effect of breaking into ultra-fine bubbles, and in the accompanying drawings, the bubble breaker is also seen to be of a tapered structure, and the diameter of the upper part is larger than that of the lower part, and also for better providing the entrainment power for the liquid phase.
Since the micro-interface generator was just developed in the early stage of the prior patent application, the micro-interface generator was named as a micro-bubble generator (CN201610641119.6), a bubble breaker (201710766435.0) and the like in the early stage, and is named as a micro-interface generator in the later stage along with the continuous technical improvement, and the micro-interface generator in the present invention is equivalent to the micro-bubble generator, the bubble breaker and the like in the prior art, and has different names. In summary, the micro-interface generator of the present invention belongs to the prior art.
Preferably, a Y-shaped pipeline is arranged at the top of the hydraulic micro-interface generator, one side of the Y-shaped pipeline is connected with the CO inlet pipeline, and the other side of the Y-shaped pipeline is connected with the top of the fermentation tank, so as to recycle and mix CO and the top gas of the fermentation tank. The top of the hydraulic micro-interface generator is provided with a Y-shaped pipeline, and two short-side pipelines at the upper end of the Y-shaped pipeline are respectively connected with a CO gas inlet pipeline and the top of the fermentation tank. Because the relation of negative pressure at fermentation tank top can deliver to the return flow channel through Y type pipeline with the gas that does not react completely, is sent back the bottom of fermentation cylinder and continues the fermentation reaction behind the return flow channel, has practiced thrift the quantity of fermentation raw materials and CO.
Preferably, the upper port of the backflow channel is flush with the liquid level at the top of the fermentation tank, and the lower port of the backflow channel is arranged at the bottom of the fermentation tank.
Preferably, a circulating pump is arranged on the outer side of the backflow channel and used for refluxing materials to the hydraulic micro-interface generator.
Preferably, a gas valve is arranged between the CO gas inlet pipeline and the hydraulic micro-interface generator and between the CO gas inlet pipeline and the pneumatic micro-interface generator.
Preferably, the inside of the fermentation tank is provided with a plurality of layers of sieve plates which are arranged in a staggered mode so as to reduce the liquid flow rate and the rising speed of the bubbles.
Preferably, the top end of the fermentation tank is provided with a gas outlet for discharging unreacted gas, the other side of the fermentation tank is provided with a discharge hole on the side wall parallel to the upper port of the return channel, and the bottom end of the fermentation tank is provided with a waste outlet.
In addition, the invention also provides a method for strengthening the biological fermentation device by the normal-pressure gas source micro-interface, which comprises the following steps:
dispersing and crushing CO micro-interface, and mixing with a fermented product for fermentation to produce ethanol;
collecting ethanol, and discharging waste materials and gas.
Specifically, the method repeatedly utilizes the fermentation raw materials by refluxing the fermentation raw materials, so that the utilization rate of the fermentation raw materials is increased, and the CO is dispersed and crushed into micro bubbles, so that the phase boundary mass transfer area is increased, the CO is more easily absorbed by the fermentation raw materials, and the resources are saved.
The method for preparing the ethanol by fermentation is simple and convenient to operate and saves energy.
Compared with the prior art, the invention has the beneficial effects that:
(1) the reflux channel is arranged at the top of the side wall of the fermentation tank, so that the fermentation material which is not completely reacted in the fermentation tank is refluxed to the bottom of the fermentation tank, the utilization rate of fermentation raw materials is improved, and the waste of the fermentation raw materials is avoided; through being provided with gas-liquid linkage formula micro-interface unit in return channel inside, break the dispersion with CO and become micron order bubble, increase the phase boundary mass transfer area between CO and the fermentation raw materials for CO is more easily absorbed by the fermentation raw materials, has practiced thrift the resource in process of production.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a device for reinforcing biological fermentation by a normal-pressure gas source micro interface according to an embodiment of the present invention.
Wherein:
11-CO inlet duct; 12-a feed conduit;
10-a fermentation tank; 101-a gas recovery port;
102-a screen deck; 104-discharge hole;
103-gas outlet; 20-a return channel;
105-a waste outlet; 202-a pneumatic micro-interface generator;
201-hydraulic micro-interface generator; 204-Y type pipeline
203-a communication pipe; 206-lower port;
205-upper port; 22-a gas valve;
21-circulating pump.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. 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. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly illustrate the technical solution of the present invention, the following description is made in the form of specific embodiments.
Example 1
Fig. 1 is a schematic structural diagram of an apparatus for microbial fermentation enhancement at a normal-pressure gas source micro interface according to an embodiment of the present invention. Including fermentation cylinder 10, return channel 20's last port 205 sets up at the top of fermentation cylinder 10, and with fermentation cylinder 10 inside upper liquid level parallel and level, return channel 20's lower port 206 sets up in fermentation cylinder 10's bottom, lets in fermentation raw materials fermentation cylinder 10 bottom for fermentation raw materials can more complete reaction, improves fermentation raw materials's utilization ratio.
The composite micro-interface generator is arranged inside the return channel 20 and consists of a hydraulic micro-interface generator 201, a pneumatic micro-interface generator 202 and a communication pipeline 203 for connecting the hydraulic micro-interface generator 201 and the pneumatic micro-interface generator 202. The pneumatic micro-interface generator 202 is arranged right below the hydraulic micro-interface generator 201, mainly because fermentation raw materials may contain fine particles or residues and can block the pneumatic micro-interface generator 202, when the pneumatic micro-interface generator 202 is blocked, the gas valve 22 connected with the pneumatic micro-interface generator 202 is closed, the fermentation raw materials downwards from the hydraulic micro-interface generator 201 right above are used for flushing the inside of the pneumatic micro-interface generator 202, and after flushing, the pneumatic micro-interface generator 202 is not blocked any more, the gas valve 22 can be opened, and the pneumatic micro-interface generator can work normally.
The outside of the return pipe is also provided with a circulation pump 21 for pumping the fermentation raw material from the return channel 20 to the hydraulic micro-interface generator 201.
The top of the hydraulic micro-interface generator 201 is provided with a Y-shaped pipeline 204, one side of the Y-shaped pipeline 204 is connected with a CO inlet pipeline 11, and the other side of the Y-shaped pipeline 204 is connected with the top of the fermentation tank 10, so that CO and the top gas of the fermentation tank 10 are recycled and mixed. The top of the hydraulic micro-interface generator 201 is provided with a Y-shaped pipeline 204, and two short-side pipelines at the upper end of the Y-shaped pipeline 204 are respectively connected with the CO inlet pipeline 11 and the top of the fermentation tank 10. Due to the negative pressure at the top of the fermentation tank 10, the gas which is not completely reacted is sent to the backflow channel 20 through the Y-shaped pipeline 204 and then sent back to the bottom of the fermentation tank 10 after passing through the backflow channel 20 to continue the fermentation reaction, so that the consumption of fermentation raw materials and CO is saved.
The other CO inlet pipeline 11 is directly communicated into the pneumatic micro-interface generator 202, the pneumatic micro-interface generator 202 serves as a main micro-interface generator, CO is dispersed and broken into CO micro-bubbles, the phase boundary mass transfer area between the fermentation raw material and CO is increased, and the utilization rate of the CO and the utilization rate of the fermentation raw material are increased.
The two CO gas inlet pipelines 11 are respectively provided with a gas valve 22, the gas valves 22 can control the amount of CO entering the hydraulic micro-interface generator 201 and the pneumatic micro-interface generator 202, when the pneumatic micro-interface generator 202 is used as a main working micro-interface generator, the gas valve 22 of the CO gas inlet pipeline 11 connected with the pneumatic micro-interface generator 202 is completely opened, and the gas valve 22 of the CO gas inlet pipeline 11 connected with the hydraulic micro-interface generator 201 is properly closed or reduced. Therefore, certain resources can be saved, when the pneumatic micro-interface generator 202 is blocked, the gas valve 22 connected with the pneumatic micro-interface generator 202 is closed, the gas valve 22 connected with the hydraulic micro-interface generator 201 is completely opened, and the pneumatic micro-interface generator 202 is flushed and cleaned by utilizing the impact flow of the hydraulic micro-interface generator 201 from top to bottom.
The lower half part of the return line and one side lower than the pneumatic micro-interface generator 202 are also provided with a feeding line 12 for supplementing fermentation raw materials and water, so as to ensure that the reaction can be carried out stably. The fermentation raw material enters the bottom of the fermentation tank 10 through a return pipeline, and sieve plates 102 are arranged on the inner side of the fermentation tank 10 in a staggered mode. Sieve plate 102 sets up in fermentation cylinder 10 inboard by mistake, for example a sieve plate 102 is placed in the left side wall of fermentation cylinder 10, and its adjacent sieve plate 102 just sets up the right side wall at fermentation cylinder 10, can slow down the rising speed of fermentation raw materials like this, has improved the utilization ratio of fermentation raw materials, prevents simultaneously that the fermentation raw materials accumulation from leading to the too fast safety problem that the increase of fermentation cylinder 10 internal gas pressure causes.
The top end of the fermentation tank 10 is provided with a gas outlet 103 and a gas recovery port 101, the gas outlet 103 and the gas recovery port 101 both discharge gas by using the negative pressure principle, one is discharged to the outside, and the other is used for improving the gas utilization rate, recovering the gas, and introducing the gas into the Y-shaped pipeline 204 of the return channel 20, so that the gas utilization rate is improved.
Comparative example 1
Comparative example 1 the same apparatus and method as in example 1 was used except that there was no return channel and composite micro-interfacial generator in comparative example 1.
Comparative example 2
Comparative example 2 the same apparatus and method as in example 1 were used except that the composite micro-interfacial generator of comparative example 2 was replaced with a conventional micro-interfacial generator.
The reaction materials and processes of example 1, comparative example 1 and comparative example 2 are the same, firstly, 10kg of straw is selected as the fermentation raw material, dried in the sun, cut and crushed, and soaked in 100ml of 0.01mol/L sulfuric acid solution for 24 hours at the temperature of 40 ℃, calcium carbonate is added, and the pH value is adjusted to be 6.2.
During the fermentation, Clostridium is selected for fermentation, and the Clostridium is added to the biological membrane on the sieve plate for fermentation, wherein the fermentation temperature is adjusted to 38 ℃, the pH value is adjusted to 6.2, and the viable count of the Clostridium is 0.4 multiplied by 109CFU/g. The fermentation is suitable for clostridium fermentation for 2 days.
The ethanol produced in example 1 was compared with that produced in comparative examples 1 and 2 to obtain the following data:
| amount of ethanol produced kg | |
| Example 1 | 4.5 |
| Comparative example 1 | 3.3 |
| Comparative example 2 | 2.8 |
Comparative example 1 in the absence of a return channel and a gas-liquid linkage type micro-interface generator, the amount of ethanol produced was reduced, i.e., the conversion rate was reduced; comparative example 2 has a backflow channel, but the composite micro-interface generator is changed into a common micro-interface generator, and the micro-interface generator of comparative example 2 is blocked during operation, so that the amount of ethanol generated is reduced, and the conversion rate is reduced. Therefore, the conclusion can be drawn that the fermentation material which is not completely reacted in the fermentation tank flows back to the bottom of the fermentation tank by arranging the backflow channel at the top of the side wall of the fermentation tank, so that the utilization rate of the fermentation raw material is improved, and the waste of the fermentation raw material is avoided; through being provided with gas-liquid linkage formula micro-interface unit in return channel inside, break the dispersion with CO and become micron order bubble, increase the phase boundary mass transfer area between CO and the fermentation raw materials for CO is more easily absorbed by the fermentation raw materials, has practiced thrift the resource in process of production.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The device for strengthening biological fermentation of the atmospheric-pressure gas source micro-interface is characterized by comprising a fermentation tank, wherein a backflow channel for backflow of fermentation raw materials is arranged on the side surface of the fermentation tank, a composite micro-interface generator is arranged in the backflow channel, the composite micro-interface generator comprises a pneumatic micro-interface generator and a hydraulic micro-interface generator, and the hydraulic micro-interface generator is connected with the pneumatic micro-interface generator through a communicating pipeline;
the composite micro-interface generator is connected with a CO gas inlet pipeline;
the bottom of the backflow channel is connected with a feeding pipeline for feeding fermentation raw materials into the fermentation tank.
2. The apparatus of claim 1, wherein the pneumatic micro-interface generator is disposed directly below the hydraulic micro-interface generator.
3. The device of claim 1, wherein a Y-shaped pipeline is arranged at the top of the hydraulic micro-interface generator, one side of the Y-shaped pipeline is connected with the CO gas inlet pipeline, and the other side of the Y-shaped pipeline is connected with a gas recovery port at the top end of the fermentation tank, so that CO and the top gas of the fermentation tank are recovered and mixed.
4. The apparatus of claim 1, wherein the upper port of the return channel is flush with the liquid level at the top of the fermentation tank and the lower port of the return channel is disposed at the bottom of the fermentation tank.
5. The apparatus of claim 1, wherein a circulation pump is disposed outside the return channel to return the material to the hydraulic micro-interface generator.
6. The apparatus of claim 1, wherein a gas valve is disposed between the CO inlet conduit and the hydraulic and pneumatic micro-interface generators.
7. The apparatus of claim 1, wherein the interior of the fermenter is provided with a plurality of sieve plates arranged in staggered arrangement for reducing liquid flow rate and bubble rising speed.
8. The apparatus according to any one of claims 1 to 7, wherein the top of the fermentation tank is provided with a gas outlet for discharging unreacted gas, the side wall of the fermentation tank on the other side parallel to the upper port of the return channel is provided with a discharge port, and the bottom of the fermentation tank is provided with a waste outlet.
9. The method for the micro-interface enhanced biological fermentation device with the atmospheric gas source according to any one of claims 1 to 8, comprising the following steps:
dispersing and crushing CO micro-interface, and mixing with a fermented product for fermentation to produce ethanol;
collecting ethanol, and discharging waste materials and gas.
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| CN202110793883.6A CN113583822A (en) | 2021-07-14 | 2021-07-14 | Device and method for strengthening biological fermentation of atmospheric gas source micro-interface |
| PCT/CN2021/109755 WO2023284025A1 (en) | 2021-07-14 | 2021-07-30 | Apparatus and method for enhancing biological fermentation by using atmospheric air source micro-interface |
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| CN202110793883.6A CN113583822A (en) | 2021-07-14 | 2021-07-14 | Device and method for strengthening biological fermentation of atmospheric gas source micro-interface |
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