WO2023284026A1 - Ultra-efficient low-pressure gas source micro-interface enhanced biological fermentation device and method - Google Patents

Abstract

An ultra-efficient low-pressure gas source micro-interface enhanced biological fermentation device, comprising a fermentation tank. A composite micro-interface generator is provided at the top of the fermentation tank; the composite micro-interface generator comprises a pneumatic micro-interface generator and a hydraulic micro-interface generator; the pneumatic micro-interface generator is connected to the hydraulic micro-interface generator by means of a connection channel; the composite micro-interface generator is connected to a CO inlet pipeline for breaking and dispersing CO into CO micro-bubbles.

Description

An ultra-high-efficiency low-pressure air source micro-interface enhanced biological fermentation device and method technical field

The invention belongs to the technical field of ethanol preparation, and in particular relates to an ultra-high-efficiency low-pressure air source micro-interface enhanced biological fermentation device and method.

Background technique

Ethanol is the fermentation industrial product with the longest production history and the largest output in the world. The industrialization of ethanol production began at the end of the 19th century and has a history of more than 100 years. It is widely used in food, chemical, pharmaceutical, dye, national defense and other industries, and it is also a very important clean resource - ethanol. Ethanol refers to anhydrous ethanol with a volume fraction above 99.5%. It can be blended with gasoline in a certain proportion to achieve blended ethanol gasoline with different octane numbers. The composition of the oxygen agent, the E10 gasoline popularized and used in my country is a blend of 10% ethanol and 90% gasoline by volume. Therefore, ethanol as a clean resource can not only replace tetraethyl lead as an anti-knock agent for gasoline, but also make Ethanol gasoline is used as vehicle fuel, which greatly reduces the pollution to the environment when gasoline is burned.

Ethanol production methods are divided into fermentation methods using plant-based substances as raw materials and chemical synthesis methods using petroleum-based substances as raw materials. Fermentative ethanol production is the most basic industry in today's bio-industry. It mainly uses starchy raw materials such as corn, rice, sorghum, wheat, and potatoes, sugary raw materials such as molasses, and fibrous raw materials such as corncobs. Ethanol is produced by fermentation and distillation.

In terms of industrial production, my country currently mainly uses fermentation to produce ethanol, that is, basically starchy raw materials, sugary raw materials or fibrous raw materials are used to produce ethanol through fermentation processes. According to statistics, more than 95% of factories in my country produce ethanol by fermentation. With the development of edible and industrial ethanol, especially the ethanol industry and the increase in demand, the shortage of raw materials has become increasingly prominent, resulting in increasingly tight domestic food supply, resulting in food shortages and sharp rises in prices, affecting national economic stability and social stability and harmony .

In the existing technology center, a large amount of resources are consumed in the process of producing ethanol, and the utilization rate of fermentation raw materials is low, resulting in waste of fermentation raw materials, and the fermentation tank occupies a large area, wasting land resources.

In view of this, the present invention is proposed.

Contents of the invention

The first purpose of the present invention is to provide an ultra-high-efficiency low-pressure air source micro-interface enhanced bio-fermentation device. This device breaks and disperses CO into micron-sized bubbles by installing a composite micro-interface generator on the top of the fermentation tank, increasing the Enlarging the mass transfer area of the phase boundary between CO and fermentation raw materials makes CO more easily absorbed by fermentation raw materials, improves the utilization rate of fermentation raw materials and CO in the production process, saves resources, and at the same time reduces the occupied area and saves land resources.

The second object of the present invention is to provide a method using the above device, which is easy to operate and saves resources.

In order to realize the above-mentioned purpose of the present invention, special adopt following technical scheme:

The invention provides an ultra-high-efficiency low-pressure air source micro-interface enhanced biological fermentation device, including a fermenter, the top of the fermenter is provided with a composite micro-interface generator, and the composite micro-interface generator includes a pneumatic micro-interface generator and a hydraulic microinterface generator, the pneumatic microinterface generator is connected to the hydraulic microinterface generator through a connecting channel;

The composite micro-interface generator is connected with a CO inlet pipe to break and disperse CO into CO microbubbles;

The bottom side wall of the fermenter is provided with a feed port for allowing the fermentation raw materials to enter the fermenter.

In the prior art, when CO is fermented to produce ethanol, the utilization rate of the fermentation raw material is low. Since the fermentation raw material is grain and the growth cycle of grain is long, the low utilization rate of the fermentation raw material causes waste and directly affects the domestic grain supply. Moreover, in the prior art, the reaction of CO and fermentation raw materials consumes a large amount of resources, which also causes a waste of resources.

In the present invention, the composite micro-interface generator is arranged on the top of the fermenter to break and disperse CO into micron-sized bubbles, thereby increasing the phase boundary mass transfer area between CO and fermentation raw materials, making CO more easily absorbed by fermentation raw materials , In the production process, the utilization rate of fermentation raw materials and CO is improved, resources are saved, and the occupied area is reduced at the same time, and land resources are saved.

The hydraulic micro-interface generator of the present invention is arranged directly above the pneumatic micro-interface generator, because most of the fermentation raw materials contain slag, which will cause blockage of micron-sized air bubbles on the pneumatic micro-interface generator, when the pneumatic micro-interface generator is blocked When the CO inlet pipe is connected to the gas valve of the pneumatic micro-interface generator, close the gas valve of the pneumatic micro-interface generator, and only rely on the gas and fermentation raw materials in the hydraulic micro-interface generator to wash the pneumatic micro-interface generator from top to bottom through the pipeline to clean the pneumatic micro-interface generator , when the clogging problem of the pneumatic micro-interface generator is solved, the CO inlet pipe can be opened to connect the gas valve of the pneumatic micro-interface generator, and the pneumatic micro-interface generator can be re-worked.

In order to save resources, it is also possible to close or turn off the gas valve and circulation pump between the CO inlet pipeline and the hydraulic micro-interface generator during operation, because the reaction materials and gases in the circulation pipeline will be affected by gravity and negative pressure Through the hydraulic micro-interface generator, this saves the resources of CO sent to the hydraulic micro-interface generator and circulation pump.

Preferably, the pneumatic micro-interface generator is arranged directly below the hydraulic micro-interface generator. The reason why the pneumatic micro-interface generator is arranged directly below the liquid micro-interface generator is that the fermentation raw materials may contain fine particles or residues, which will block the pneumatic micro-interface generator. When the pneumatic micro-interface generator is blocked, Close the gas valve connected to the pneumatic micro-interface generator, and use the downward fermentation material from the hydraulic micro-interface generator directly above to flush the inside of the pneumatic micro-interface generator. Work.

Those skilled in the art can understand that the micro-interface generator used in the present invention has been embodied in the inventor's previous patents, such as application numbers CN201610641119.6, CN201610641251.7, CN201710766435.0, CN106187660, CN105903425A, Patents of CN109437390A, CN205833127U and CN207581700U. The specific product structure and working principle of the micro-bubble generator (that is, the micro-interface generator) were introduced in detail in the prior patent CN201610641119.6. There is a cavity, the body is provided with an inlet communicating with the cavity, the opposite first end and second end of the cavity are open, and the cross-sectional area of the cavity is from the middle of the cavity to the first end and the second end of the cavity. The second end is reduced; the secondary broken piece is arranged at at least one of the first end and the second end of the cavity, a part of the secondary broken piece is set in the cavity, and the two ends of the secondary broken piece and the cavity are open An annular channel is formed between the through holes. The micron bubble generator also includes an inlet pipe and a liquid inlet pipe.” From the specific structure disclosed in the application document, it can be known that the specific working principle is: the liquid enters the micrometer tangentially through the liquid inlet pipe. In the bubble generator, the gas is rotated and cut at a super high speed, so that the gas bubbles are broken into micron-level micro-bubbles, thereby increasing the mass transfer area between the liquid phase and the gas phase, and the micro-bubble generator in this patent belongs to the pneumatic micro-interface generation device.

In addition, it is recorded in the prior patent 201610641251.7 that the primary bubble breaker has a circulating liquid inlet, a circulating gas inlet, and a gas-liquid mixture outlet, while the secondary bubble breaker connects the feed port with the gas-liquid mixture outlet, indicating that the bubble breaker is both It needs to be mixed with gas and liquid. In addition, it can be seen from the attached drawings that the primary bubble breaker mainly uses circulating fluid as power, so in fact, the primary bubble breaker is a hydraulic micro-interface generator, and the secondary bubble breaker is a gas-liquid breaker. At the same time, the mixture is passed into the elliptical rotating ball for rotation, so that the bubbles are broken during the rotation process, so the secondary bubble breaker is actually a gas-liquid linkage micro-interface generator. In fact, whether it is a hydraulic micro-interface generator or a gas-liquid linkage micro-interface generator, they all belong to a specific form of the micro-interface generator, but the micro-interface generator used in the present invention is not limited to the above-mentioned several forms The specific structure of the bubble breaker described in the prior patents is only one of the forms that the micro-interface generator of the present invention can adopt.

In addition, it is recorded in the previous patent 201710766435.0 that "the principle of the bubble breaker is high-speed jet flow to achieve gas collision", and it is also explained that it can be used in micro-interface strengthening reactors to verify the relationship between the bubble breaker and the micro-interface generator. and the prior patent CN106187660 also has relevant records for the specific structure of the bubble breaker, specifically see paragraphs [0031]-[0041] in the description, and the accompanying drawings, which describe the bubble breaker S-2 The specific working principle of the bubble breaker is described in detail. The top of the bubble breaker is the liquid phase inlet, and the side is the gas phase inlet. The liquid phase coming in from the top provides the entrainment power, so as to achieve the effect of crushing into ultra-fine bubbles, which can also be seen in the attached drawings. The bubble breaker has a conical structure, and the diameter of the upper part is larger than that of the lower part, which is also for the liquid phase to provide better entrainment power.

Since the micro-interface generator was just developed in the early stage of the patent application, it was named micro-bubble generator (CN201610641119.6) and bubble breaker (201710766435.0) in the early stage. With continuous technological improvement, it was later renamed as micro-interface generator Device, now the micro-interface generator in the present invention is equivalent to the previous micro-bubble generator, bubble breaker, etc., but the name is different. In summary, the micro-interface generator of the present invention belongs to the prior art.

Preferably, the top of the fermenter is provided with a gas recovery pipeline, one end of the gas recovery pipeline is connected to the top of the fermenter, and the other end is connected to a hydraulic micro-interface generator.

Preferably, the pneumatic micro-interface generator is connected with a delivery pipeline for delivering CO microbubbles to the bottom of the fermenter.

Preferably, the bottom end of the delivery pipeline is provided with a shunt pipe for uniformly dispersing CO into the interior of the fermenter.

Preferably, a gas valve is provided between the CO inlet pipe, the hydraulic micro-interface generator, and the pneumatic micro-interface generator.

Preferably, the interior of the fermenter is provided with multiple layers of sieve plates arranged in random order to slow down the flow rate of the fermentation material and the rise rate of the microbubbles.

Preferably, the top of the fermenter is provided with a tail gas outlet to discharge unreacted gas, the side wall of the fermenter is provided with a discharge port, and the bottom of the fermenter is provided with a waste outlet.

In addition, the present invention also provides a method for producing ethanol by CO atmospheric pressure micro-interface fermentation, comprising the following steps:

After the CO micro-interface is dispersed and crushed, it is mixed and fermented with the fermented product to produce ethanol;

The ethanol is collected and the waste and gas are vented.

Specifically, the method increases the mass transfer area of the phase boundary by dispersing and breaking CO into microbubbles, making CO more easily absorbed by fermentation raw materials, increasing the utilization rate of fermentation raw materials, and saving resources.

The method for producing ethanol by fermentation of the present invention is easy to operate and saves energy consumption.

Compared with prior art, the beneficial effect of the present invention is:

(1) In the present invention, by setting the composite micro-interface generator on the top of the fermenter, CO is broken and dispersed into micron-sized bubbles, which increases the mass transfer area of the phase boundary between CO and fermentation raw materials, making CO more easily absorbed The absorption of fermentation raw materials improves the utilization rate of fermentation raw materials and CO in the production process, saves resources, and at the same time reduces the occupied area and saves land resources.

Description of 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 embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

Fig. 1 is a schematic structural diagram of an ultra-high-efficiency low-pressure air source micro-interface enhanced biological fermentation device provided by an embodiment of the present invention.

in:

10-Fermentation tank; 101-Gas recovery pipeline;

102-sieve plate; 104-outlet;

103-exhaust gas outlet; 106-conveying pipeline;

105-waste outlet; 11-CO intake pipe;

1061-shunt; 20-composite micro-interface generator;

12-Material inlet; 202-Pneumatic micro-interface generator;

201-hydraulic micro-interface generator; 21-circulation pump;

203-communicating pipeline; 22-gas valve.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are some of the embodiments of the present invention, rather than all of them. It is only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In order to illustrate the technical solution in the present invention more clearly, the following will be described in the form of specific examples.

Example

Refer to FIG. 1 , which is a schematic structural diagram of an ultra-high-efficiency low-pressure air source micro-interface enhanced bio-fermentation device provided by an embodiment of the present invention. It includes a fermenter 10, a compound micro-interface generator 20, the compound micro-interface generator 20 is arranged on the top of the fermenter 10, the compound micro-interface generator 20 includes a hydraulic micro-interface generator 201 and a pneumatic micro-interface generator 202, the liquid The dynamic micro-interface generator 201 is arranged outside the top of the fermenter 10, the pneumatic micro-interface generator 202 is arranged on the inside of the top of the fermenter 10, the pneumatic micro-interface generator 202 and the liquid-dynamic micro-interface generator 201 are connected through a communication pipe 203, And the hydraulic micro-interface generator 201 is directly above the pneumatic micro-interface generator 202 . The reason why the pneumatic micro-interface generator 202 is arranged directly below the hydraulic micro-interface generator 201 is because the fermentation raw materials may contain fine particles or residues, which will block the pneumatic micro-interface generator 202. When the pneumatic micro-interface generator 202 is blocked At this time, close the gas valve 22 connected to the pneumatic micro-interface generator 202, and use the downward fermentation raw material of the hydraulic micro-interface generator 201 directly above to flush the interior of the pneumatic micro-interface generator 202. After flushing, the pneumatic micro-interface generator 202 no longer The blockage can open the gas valve 22 and work normally.

The bottom end of the pneumatic micro-interface generator 202 is connected with a delivery pipeline 106 for transporting the dispersed and crushed CO to the bottom of the fermenter 10, which can increase the residence time of CO in the fermenter 10 and increase the interaction between CO and fermentation raw materials. The contact time improves the utilization of fermentation raw materials and CO. The bottom end of the delivery pipe 106 is also provided with a distribution pipe 1061 for uniformly dispersing CO into the fermenter 10 to prevent the CO from being dispersed to one side of the fermenter 10 and not uniformly dispersed.

A circulation pump 21 is provided on the left side of the fermenter 10, and the unfermented fermentation raw material is returned to the liquid micro-interface generator 201 through the circulation pump 21, which improves the utilization rate.

There are two CO intake pipes, one leads into the hydraulic micro-interface generator 201, and the other leads into the pneumatic micro-interface generator 202. The liquid micro-interface generator 201 also leads into the top of the fermenter 10 due to negative The pressure affects the gas passing from the gas recovery pipeline 101 into the hydraulic micro-interface generator 201.

Both CO inlet pipes are provided with gas valves 22, which 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 the main working micro When the interface generator is used, fully open the gas valve 22 connected to the CO intake pipeline of the pneumatic microinterface generator 202, and properly close or close the gas valve 22 of the CO intake pipeline connected to the hydraulic microinterface generator 201. This can save certain resources. When the pneumatic micro-interface generator 202 is blocked, close the gas valve 22 connected to the pneumatic micro-interface generator 202, fully open the gas valve 22 connected to the hydraulic micro-interface generator 201, and use the hydraulic micro-interface The interface generator 201 flushes and cleans the pneumatic micro-interface generator 202 with the impact flow from top to bottom.

The interior of the fermenter 10 is provided with a multi-layer sieve plate 102 arranged in random order to slow down the flow rate of the fermentation raw material and the rise rate of the microbubbles.

The top of the fermenter 10 is provided with a tail gas outlet 103 and a gas recovery pipeline 101. Both the tail gas outlet 103 and the gas recovery pipeline 101 use the principle of negative pressure to discharge the gas. The micro-interface generator 201 can reuse the gas and improve the utilization rate of the gas.

Comparative example 1

Comparative Example 1 uses the same device and method as in Example 1, the only difference being that there is no return channel and composite micro-interface generator in Comparative Example 1.

Comparative example 2

In Comparative Example 2, the same device and method as in Example 1 were used, the only difference being that the composite micro-interface generator in Comparative Example 2 was replaced with an ordinary micro-interface generator.

The reaction materials and process of embodiment 1, comparative example 1 and comparative example 2 are all identical, at first the fermentation raw material that chooses is stalk 10kg, dries, cuts and pulverizes, soaks 24h with 100ml0.01mol/L sulfuric acid solution, temperature is At 40°C, add calcium carbonate to adjust the pH to 5.2.

During the fermentation process, Clostridium was selected for fermentation, and Clostridium was added to the biofilm on the sieve plate for fermentation. At this time, the temperature was adjusted to a fermentation temperature of 38°C, the pH value was adjusted to 6.2, and the live bacteria of Clostridium were The number was 0.4×10 ⁹ CFU/g. At this time, it is suitable for the fermentation of Clostridia, and it is fermented for 2 days.

The ethanol that embodiment 1 and comparative example 1, comparative example 2 generate are compared, obtain following data:

the	The amount of ethanol produced kg
Example 1	4.5
Comparative example 1	3.3
Comparative example 2	2.8

In comparative example 1, there is no backflow channel and gas-liquid linkage type micro-interface generator, so that the amount of ethanol generated is reduced, that is, the conversion rate is reduced; although comparative example 2 has a backflow channel, the composite micro-interface generator is changed to an ordinary micro-interface generator, The micro-interface generator of Comparative Example 2 was clogged during operation, resulting in a reduction in the amount of ethanol produced and a reduction in the conversion rate. Therefore, it can be concluded that by providing a return channel on the top of the side wall of the fermenter, the unreacted fermented product of the fermenter is returned to the bottom of the fermenter, which improves the utilization rate of the fermentation raw material and avoids the waste of the fermented raw material ;By installing a gas-liquid linkage micro-interface unit inside the reflux channel, the CO is broken and dispersed into micron-sized bubbles, which increases the mass transfer area of the phase boundary between CO and the fermentation raw material, making CO more easily absorbed by the fermentation raw material. Resources are saved in the production process.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (9)

1. An ultra-high-efficiency low-pressure air source micro-interface enhanced biological fermentation device is characterized in that it includes a fermenter, and the top of the fermenter is provided with a composite micro-interface generator, and the composite micro-interface generator includes a pneumatic micro-interface generator and a hydraulic microinterface generator, the pneumatic microinterface generator is connected to the hydraulic microinterface generator through a connecting channel;

   The composite micro-interface generator is connected with a CO inlet pipe to break and disperse CO into CO microbubbles;

   The bottom side wall of the fermenter is provided with a feed port for allowing the fermentation raw materials to enter the fermenter.
2. The device according to claim 1, wherein the pneumatic micro-interface generator is arranged directly below the hydraulic micro-interface generator.
3. The device according to claim 1, wherein the top of the fermenter is provided with a gas recovery pipeline, one end of the gas recovery pipeline is connected to the top of the fermenter, and the other end is connected to a liquid micro-interface generator .
4. The device according to claim 1, wherein the pneumatic micro-interface generator is connected with a delivery pipeline for delivering CO microbubbles to the bottom of the fermenter.
5. The device according to claim 4, characterized in that, the bottom end of the delivery pipeline is provided with a shunt pipe for uniformly dispersing CO into the interior of the fermenter.
6. The device according to claim 1, characterized in that a gas valve is arranged between the CO inlet pipe and the hydraulic micro-interface generator and the pneumatic micro-interface generator.
7. The device according to claim 1, characterized in that, the interior of the fermenter is provided with multi-layer sieve plates arranged in random order to slow down the flow rate of fermentation raw materials and the rising speed of microbubbles.
8. The device according to claim 1, characterized in that, the top of the fermentor is provided with a tail gas outlet to discharge the unreacted gas, the side wall of the fermenter is provided with a discharge port, the fermentor The bottom end of the tank is provided with a waste outlet.
9. The method for a kind of ultra-efficient low-pressure air source micro-interface strengthening biological fermentation device according to any one of claims 1-8, is characterized in that, comprises the steps:

   After the CO micro-interface is dispersed and crushed, it is mixed and fermented with the fermented product to produce ethanol;

   The ethanol is collected, and the waste and tail gas are discharged.

Images