CN114085753A - Forced circulation flow energy-saving fermentation tank - Google Patents

Forced circulation flow energy-saving fermentation tank Download PDF

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CN114085753A
CN114085753A CN202111388073.9A CN202111388073A CN114085753A CN 114085753 A CN114085753 A CN 114085753A CN 202111388073 A CN202111388073 A CN 202111388073A CN 114085753 A CN114085753 A CN 114085753A
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sleeve
fermentation
fermentation tank
tank
pump
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徐亲民
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Shijiazhuang Jirui Energy Saving Technology Co ltd
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Shijiazhuang Jirui Energy Saving Technology Co ltd
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    • C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
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    • C—CHEMISTRY; METALLURGY
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    • 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
    • C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
    • 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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    • 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
    • C12M29/26—Conditioning fluids entering or exiting the reaction vessel
    • 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
    • C12M37/00—Means for sterilizing, maintaining sterile conditions or avoiding chemical or biological contamination
    • C12M37/04—Seals
    • 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
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/02—Means for regulation, monitoring, measurement or control, e.g. flow regulation of foam
    • 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
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/40—Means for regulation, monitoring, measurement or control, e.g. flow regulation of pressure

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Abstract

The invention relates to an energy-saving fermentation tank which is provided with a fluid pump outside the tank to replace stirring and force fermentation liquor to flow circularly, wherein a sleeve concentric with the fermentation tank is arranged inside the fermentation tank, the lower part of the sleeve is fixed at the bottom of the fermentation tank, and the upper part of the sleeve is opened and is positioned below the liquid level; a venturi tube for mixing fermentation liquor and air is arranged below the sleeve, the upper part of the venturi tube is communicated with the sleeve, the lower part of the venturi tube is connected with the outlet end of a fluid pump, and the inlet end of the pump is connected with a heat exchanger in series and is communicated with the fermentation liquor outside the sleeve; the top of the fermentation tank is provided with a small cylinder, the lower part of the cylinder is provided with a defoaming paddle, the side surface of the upper end of the cylinder is led out of an exhaust pipe, and a foam probe inserted into the fermentation tank is arranged beside the cylinder. The foam reaching the small cylinder body on the top of the tank is crushed by the defoaming paddle in the operation process, the liquid is separated and returned into the sleeve, and the gas is discharged out of the tank through the exhaust pipe. The advantages of this new fermentation tank are that it can greatly reduce aeration and stirring power cost, strengthen mixing, mass transfer and cooling of fermentation liquor, simplify fermentation tank structure and raise charging coefficient.

Description

Forced circulation flow energy-saving fermentation tank
Technical Field
The invention belongs to the field of biological engineering subject bioreactors, and more particularly relates to main equipment for producing fermentation products or culturing cells in the fields of biological pharmacy, biochemical engineering, biological products, biological energy and food industries.
Background
The fermentation tank for fermentation product production and cell culture has eight doors, and generally speaking, there are two major types of aerobic fermentation tank and anaerobic fermentation tank, and the aerobic fermentation tank is divided into mechanical stirring fermentation tank and air-lift fermentation tank.
As is known, an aerobic fermentation tank is a biological chemical and mechanical device which consumes large energy, and mainly consumes a large amount of electric energy by ventilation, stirring and cooling water circulation, accounting for about 80% of the total energy consumption of fermentation production and accounting for about 30% of the fermentation production cost. Especially, the electric energy consumption of the ventilation air compressor accounts for about 2/3 of the total electric energy consumption. In order to save energy, an air-lift fermentation tank is used for replacing a mechanical stirring fermentation tank, but although the stirring electric energy is saved, the ventilation resistance is increased due to the increase of the height-diameter ratio of the fermentation tank and the depth of a liquid layer, so that the pressure of an air compressor has to be increased, the ventilation power consumption is obviously increased, the liquid mixing effect is obviously lower than that of the mechanical stirring fermentation tank, and the consumption of manufacturing steel with the same volume is obviously higher than that of the mechanical stirring fermentation tank. Therefore, other than cell culture that is not resistant to shear, airlift fermenters are rarely used in other fermentation processes.
In the design of fermenter stirrers, a combination of radial and axial paddles has been used in recent years to achieve certain mixing enhancement and energy saving effects, for example, an anaerobic fermenter stirrer disclosed as CN210193850U and a high-efficiency fermenter stirrer disclosed as CN 211947004U; but the consumption of the stirring electric energy is still high due to the wide adoption of the high-density culture process. In addition, the flow velocity of the fermentation liquor forms an obvious gradient in the radial or axial distance, and particularly, with the continuous increase of the volume of the fermentation tank, the stirring and mixing effect influenced by the gradient is also a problem to be solved urgently.
In the aspect of the design of the vent pipe in the fermentation tank, a porous type, a multi-branch pipe type or a plurality of venturi tube types are preferred in the past, so that the ventilation resistance is increased in spite of the effect of increasing the air dispersity to a certain extent, the ventilation resistance is increased, the cleaning is inconvenient, even dead corners which are not clean and can discharge feed liquid are generated, and the hidden danger of mixed bacteria pollution is generated. And to the haplopore ventilation, although avoided the stock dead angle, reduced the resistance of ventilating, the breather pipe of arranging in the fermentation cylinder has one and blows or the entanglement problem of blowing down: although most of the air bubbles blown upwards can be broken by the stirring blades at the bottom of the tank, the dispersion degree of the air is increased, the oxygen transfer is facilitated, and the solid matters in the fermentation liquor are easy to deposit at the bottom of the tank; although the downward blowing air bubbles can avoid the deposition of solid matters, the bubbles bypass the stirring blade and are not broken, and the dispersion of air and the transmission efficiency of oxygen are influenced.
In addition, no matter what kind of combination of the stirring paddles and the vent pipe is adopted, a relatively static dead angle always exists in the fermentation tank between the two stirring paddles and around the tank bottom, the growth and metabolism of cells are influenced, the larger the volume of the tank is, the larger the relatively static dead angle area is, and the more serious the problem of poor mixing is.
Based on the analysis of the defects of the background technology, the method of forcing the fermentation liquor to flow circularly by using the fluid pump is adopted, the gas-liquid dispersion and stirring mixing effects are enhanced, the pressure required by aeration is reduced, and the condition of moving the fermentation liquor to the outside of the tank and cooling by using the efficient heat exchanger is created, so that the consumption of aeration, stirring electric energy and cooling water is greatly reduced, the electric energy consumption of the overall cooling water circulation is also reduced, the design of a fermentation tank is simplified, and the manufacturing cost is reduced.
Disclosure of Invention
The invention aims to provide a novel energy-saving fermentation tank which reduces the pressure required by ventilation, reduces the electric energy consumption of ventilation and stirring, strengthens the gas-liquid dispersion and fermentation liquor mixing effect, improves the loading volume rate and reduces the manufacturing cost of the fermentation tank.
The energy-saving fermentation tank with forced circulation flow is internally provided with a sleeve concentric with the fermentation tank, the outside of the fermentation tank below the sleeve is provided with a venturi tube for sucking air and fully mixing with fermentation liquor, the upper outlet of the venturi tube is connected with the bottom of the fermentation tank sleeve, the lower inlet of a venturi pump is connected with the outlet of a fluid pump, the inlet of the fluid pump is connected with the outlet of a fermentation liquor channel of a heat exchanger, and the inlet of the fermentation liquor channel of the heat exchanger is connected with the bottom of the fermentation tank outside the sleeve, so that the fermentation liquor inside and outside the fermentation tank sleeve forms a circulation loop.
The bottom of the sleeve is provided with one or a plurality of pairs of symmetrical square-round or other-shaped notches, and then the notches are concentrically fixed at the bottom of the fermentation tank, the inner sectional area of the sleeve is smaller than the annular sectional area between the sleeve and the wall of the fermentation tank, so that the ascending flow speed of the fermentation liquid in the sleeve is larger than the returning flow speed outside the sleeve, the fermentation liquid can be forced to ascend along the inner section of the sleeve, the returning is avoided on the outer side of the sleeve, and the fermentation liquid is prevented from being detained in the sleeve. The height of the fixed sleeve is lower than that of the fermentation cylinder body, so that the upper edge of the opening can be positioned below the liquid level of the fermentation liquid.
The venturi tube is designed according to general design specifications, the inlet and outlet caliber of the venturi tube is matched with the outlet pipe diameter of the fluid pump, a nozzle is arranged in the venturi tube, fermentation liquor is pressurized by the fluid pump and then passes through the nozzle at a high speed, negative pressure is generated in the venturi tube, sterile air from a fan is sucked in, the sterile air and the fermentation liquor are fully mixed and then enter a fermentation tank sleeve, and the sterile air is not introduced by means of high pressure of a compressor like a common fermentation tank. The air suction inlet on the side surface of the Venturi tube is provided with a one-way valve, so that sterile air can be sucked into the Venturi tube, and fermentation liquor cannot flow back into a sterile air pipeline. Because the venturi tube has no dead angle inside, fermentation liquor can not be reserved after the fermentation tank is emptied.
The fluid pump arranged at the lower part of the energy-saving fermentation tank with forced circulation flow is a high-temperature resistant variable-speed pump or a displacement pump with no leakage at a sealing part, such as a high-temperature centrifugal pump, an axial flow pump, a rotor pump, a gear pump, a screw pump, a piston pump, a corresponding shield pump, a magnetic pump and the like, and can resist sterilization of high-temperature steam or high-temperature superheated water. Generally, for fermentation processes that are shear-resistant, a rate-type pump is selected, while for fermentation processes that are shear-sensitive, a volumetric pump is selected.
The heat exchanger arranged between the tank bottom outside the sleeve of the forced circulation flowing energy-saving fermentation tank and the inlet of the fluid pump is a sleeve type, a tube type, a baffle plate type, a spiral plate type and other high-efficiency heat exchangers, and is respectively provided with two independent convection channels of fermentation liquor and cooling water, so that the cooling effect of the fermentation liquor can be enhanced, the fermentation liquor channel has no material storage dead angle, the cleaning and the sterilization are convenient, and more importantly, the fermentation liquor channel and the cooling water channel must not cross materials.
The diameter of the small cylinder arranged at the top of the energy-saving fermentation tank with forced circulation flow is required to be several times larger than the diameter of the exhaust pipe, the lower part of the cylinder is provided with a propeller, a folding blade paddle, a screw paddle or other defoaming paddles with a downward propelling function, a rotating shaft of the defoaming paddles is directly connected with a small motor at the top end of the cylinder, an exhaust pipe is led out from the side surface of the upper end of the cylinder, and a foam probe inserted into the fermentation tank is arranged outside the cylinder. When the foam probe detects a foam signal, the motor is automatically started to drive the defoaming paddle to rotate at a high speed, so that foam is crushed, gas-liquid separation is carried out, and the separated liquid is forcibly sent back to the liquid level by the propelling paddle.
The exhaust pipeline on the side surface of the upper end of the small barrel at the top of the energy-saving fermentation tank with forced circulation flow is provided with the exhaust valve, and the inlet end of the exhaust valve is provided with the small exhaust valve, so that small amount of exhaust is convenient during empty tank sterilization of the fermentation tank, and the consumption of sterilization steam is reduced.
The venturi tube fermentation liquor discharge valve at the lower part of the venturi tube and the inlet end of the heat exchanger fermentation liquor discharge valve at the lower part of the heat exchanger are also provided with small steam discharge valves, which can facilitate the sterilization of equipment and pipelines and reduce the consumption of sterilization steam or superheated water,
when the energy-saving fermentation tank with forced circulation flow is operated, the fermentation liquor outside the sleeve is cooled by the heat exchanger under the driving action of the fluid pump, is pressurized by the fluid pump, is pumped into the sleeve through the venturi tube, simultaneously carries air in, performs sufficient gas-liquid dispersion and liquid-liquid and solid-liquid mixing, rises along the inner section of the sleeve, is sucked into the pump after returning from the outer side of the sleeve after reaching the top of the sleeve, enters the sleeve of the fermentation tank through the venturi tube again, and is circulated repeatedly. When the foam is more in the fermentation process, the foam carries the fermentation liquor and possibly reaches the bottom of the small cylinder body on the top of the tank, according to a signal detected by the foam probe, the small motor is automatically started to drive the defoaming paddle to rotate at a high speed to separate gas from liquid, liquid drops are pushed by the push type defoaming paddle to return to the liquid level, and the gas is discharged out of the fermentation tank from the exhaust pipe.
Compared with the common mechanical stirring fermentation tank and the airlift fermentation tank, the forced circulation flowing energy-saving fermentation tank has the advantages that:
1. because of the negative pressure suction function of the Venturi tube with the nozzle, the air can be supplied by an air compressor, and only a fan which can generate air quantity required by the process, is low in energy consumption and low in price is required, so that the cost of ventilation equipment and the electric energy consumption are greatly reduced.
2. The venturi tube sucks air to generate gas-liquid dispersion effect which is obviously superior to that of a common vent pipe, and meanwhile, the venturi tube has no dead angle inside, so that the defect that fermentation liquor is easy to remain inside a porous vent pipe or a branch vent pipe of a fermentation tank and cannot be discharged, scaling is caused, and the venturi tube is difficult to clean, so that the venturi tube becomes a potential risk of contamination to bacteria is overcome.
3. Because the fluid pump is used for forcing the fermentation liquor to circularly flow, a stirrer is omitted, the mixing effect better than that of the stirrer can be achieved, the flow gradient and the mixing dead angle are eliminated, the energy consumption is obviously lower than that of the stirrer, and meanwhile, the shearing effect can be reduced.
4. The little barrel that installs additional at the fermentation cylinder top and the high-speed rotatory defoaming oar that directly links with the motor can the shutoff little barrel end opening, prevents overflowing of foam, increases the charge capacity of fermentation cylinder, saves the use of defoaming agent.
5. The heat exchanger is used for replacing a cooling coil or a jacket, so that the fermentation liquor cooling effect can be enhanced, the cooling water consumption is reduced, the fermentation tank structure is simplified, and the fermentation tank manufacturing cost is reduced.
Drawings
In order to better understand the characteristics and beneficial effects of the forced circulation flow energy-saving fermentation tank of the invention, the structural characteristics are further clarified below by combining the attached drawings. It should be noted that the components and shapes of the apparatus and its accessories shown in the drawings are only given as a specific example for convenience of description and should not be taken as technical limitations of the present invention. Those skilled in the art can make certain additions or modifications based on the general technical knowledge, but cannot break through or deny the technical rights of the invention.
FIG. 1 is a schematic structural diagram of an energy-saving fermentation tank with forced circulation flow;
fig. 2 is a schematic view of the construction of the sleeve.
The system comprises an exhaust valve 1, an exhaust valve 2, a pressure gauge 3, a small exhaust valve 4, a motor 5, a small cylinder 6, a foam probe 7, a defoaming paddle 8, a sleeve 8, a fermentation tank outer wall 9, a fermentation tank and heat exchanger connecting pipe 10, a heat exchanger 11, a heat exchanger 12, a heat exchanger cooling water return valve 13, a heat exchanger cooling water valve 14, a venturi tube 15, a one-way valve 16, a venturi tube fermentation liquor discharge valve 17, a fluid pump 18 and a heat exchanger fermentation liquor discharge valve.
Detailed Description
To more clearly illustrate the technical problems, technical solutions and advantageous effects of the present invention, an embodiment of the present invention is described below. It is also to be understood that many embodiments are possible and not possible, and that these embodiments are not to be construed as limiting the scope of the invention.
Example 1
As shown in figures 1 and 2 of the drawings,
an energy-saving fermentation tank with forced circulation flow comprises an outer wall 9 of the fermentation tank, a sleeve 8 concentric with the fermentation tank is arranged in the fermentation tank, the lower part of the sleeve is fixed at the bottom of the fermentation tank, and the upper part of the sleeve is open and is positioned below the liquid level; a Venturi tube 14 and a fluid pump for mixing fermentation liquor and air are arranged below the sleeve 8, the upper part of the Venturi tube is communicated with the sleeve, the lower part of the Venturi tube is connected with the outlet end of the fluid pump, a heat exchanger is connected in series with the inlet end of the pump and is communicated with the fermentation liquor outside the sleeve, a small barrel 5 is arranged at the top of the fermentation tank, a defoaming paddle 7 is arranged at the lower part of the small barrel 5, an exhaust pipe is led out from the side surface of the upper part of the small barrel, the fermentation liquor inside and outside the sleeve is forced to be mixed with gas-liquid and flow circularly through the fluid pump and the Venturi tube and is forced to be cooled through the heat exchanger, when foam formed in the process reaches the small barrel on the top of the tank, the foam is crushed by the defoaming paddle and is subjected to gas-liquid separation, the liquid goes down to return to the liquid level, and the gas is exhausted out of the tank through the exhaust pipe.
Furthermore, a nozzle is arranged in the venturi tube below the fermentation tank sleeve, fermentation liquor outside the sleeve strongly passes through the nozzle through pressurization of the fluid pump 17, negative pressure is formed under the action of high-speed injection, air from the fan is sucked in, a generated gas-liquid mixture enters the fermentation tank sleeve, and the gas-liquid mixture is forced to circularly flow in the sleeve from bottom to top and outside the sleeve from top to bottom and then is sucked into the fluid pump.
Furthermore, the fluid pump arranged below the venturi tube is a pump which has no leakage, is resistant to cavitation and is resistant to high-temperature sterilization, such as a centrifugal pump, an axial flow pump, a rotor pump, a gear pump, a screw pump and a piston pump which have high-temperature sealing, or a corresponding canned motor pump, an electromagnetic pump and the like.
Furthermore, one or more pairs of symmetrical notches are formed in the bottom of the concentric sleeve in the fermentation tank, so that fermentation liquid inside and outside the sleeve can circulate.
Furthermore, a fermentation tank and heat exchanger connecting pipe 10, which connects the fermentation liquid outside the sleeve and the inlet end of the fluid pump, is connected in series with a heat exchanger 11 provided with a fermentation liquid and cooling water channel, and is used for performing forced cooling outside the fermentation liquid. And a heat exchanger cooling water return valve 12 and a heat exchanger cooling water valve 13 are connected to the heat exchanger 11.
The fermentation liquor channel of the heat exchanger is required to have small flow resistance, no material storage dead angle and easy cleaning, and steam or high-temperature superheated water can be introduced for sterilization, such as a sleeve-type heat exchanger, a tubular heat exchanger, a baffle-plate type heat exchanger, a spiral plate type heat exchanger and the like.
Further, a small cylinder is arranged at the top of the fermentation tank, a defoaming paddle is arranged at the lower end of the cylinder, a motor 4 directly connected with a rotating shaft of the defoaming paddle is arranged at the top of the fermentation tank, an exhaust pipe is arranged on the side surface of the upper end of the fermentation tank, an exhaust valve 1 with a small exhaust valve at the inlet end is arranged on the exhaust pipe, and a pressure gauge 2 is arranged on the exhaust pipe between the exhaust valve 1 and the small cylinder 5 on the top of the tank; the defoaming paddle is a propeller, a folding paddle, a screw paddle and other paddles with propelling function, and presses foam close to the sleeve under the action of high-speed rotation, separates gas from liquid, propels the liquid to return to the liquid surface, and prevents the liquid from entering the exhaust pipe.
Furthermore, a foam probe 6 inserted into the fermentation tank is arranged beside the small cylinder body on the top of the tank, a detection signal is coupled with a motor switch which drives the defoaming paddle to rotate above the cylinder body, the motor is automatically started once a foam signal exists, the defoaming paddle rotates at a high speed, foam is pressed and eliminated, and the motor is automatically turned off after the foam descends.
Example 2
The energy-saving fermentation tank with forced circulation flow is further optimized on the basis of embodiment 1, and a one-way valve 15 is arranged at the joint of the side surface of the Venturi tube and an air pipeline at the outlet of a fan, so that fermentation liquor is prevented from entering the air pipeline and the fan.
The check valve with connecting tube below between the venturi is equipped with a venturi zymotic fluid blow-down valve, heat exchanger with connecting tube below between the fluid pump entry is equipped with an exchanger zymotic fluid blow-down valve, and the entry end of two blow-down valves has little steam extraction valve for after the fermentation is finished with the inside and outside zymotic fluid of sleeve emit and when making things convenient for the sterilization little steam extraction.
Example 3:
the invention designs 100m with the structure consistent with that of the attached figure 13The basic parameters of the forced circulation flow energy-saving fermentation tank are as follows: the external diameter of the tank is 4m, the height of the cylinder is 8m, the wall thickness is 10mm, and the nominal volume is equal to the volume of the cylinder and the volume of the end socket at the bottom of the tank is equal to 107.8m3. The charging coefficient is set to be 80 percent, namely the charging quantity is 86.2m3And the height of the liquid layer is 6.5 m. The diameter of the sleeve is 2.5m, the height is 6.5m, the wall thickness is 3mm, and the upper end opening of the sleeve is 0.75m below the static liquid level.
Calculating the peak fermentation heat to be about 38 MJ/(m) according to professional knowledge3H) according to a fermentation broth volume of 87m3The peak cooling load is about 900kW, so the heat exchange area is 40m2The flow rate of the spiral plate type heat exchanger is 400m3A chemical process pump with a delivery head of 20m and a motor with 30kW standard is matched, and the fermentation liquid can be circulated once in 13 minutes, so that the requirement of mixing time required in the fermentation process is fully met. 0.13MPa and 100m3Multistage high pressure centrifugation at/minAnd the power of a fan and a standard motor is 72 kW. The total power of the two items is 30+ 72-102 kW. As for the small motor of defoaming oar that sets up on the little barrel of tank deck, compare with the power consumptive of fan and pump, can ignore.
Conventional 100m3Power allocation of mechanical stirred fermenter according to the charge 80m3The meter is provided with a 160kW stirring motor, 0.2MPa and 80m3Min of compressed air. The outlet pressure of the air compressor needs to be redundant to 0.25MPa, and the air compressor is prepared for 1m each time3The compressed air consumes about 0.05kWh, the ventilation consumes 240kW of power, plus 20% of air loss, and the actual ventilation power is 288 kW. The total power consumption of the two items is 160+ 288-448 kW.
Compared with the two phases, the forced circulation flow energy-saving fermentation tank of the invention saves 488-one 102-346 kW of power in the aspects of ventilation and stirring, and the power saving rate reaches 70%. 8000 hours per year working day, 2768000kWh annual energy conservation, and 166 ten thousand yuan converted into RMB. This does not account for the cooling power savings due to the increased cooling efficiency and the manufacturing costs savings due to the simplified construction of the fermenter.
In addition, the forced circulation flow energy-saving fermentation tank of the invention can also improve the charging coefficient, such as 100m of the above embodiment3The charging amount of the fermentation tank is 80m3Increased to 87m3And the escape loss of fermentation liquor caused by exhaust is reduced, and the additional yield increase benefit of about 10 percent is generated while the power consumption is reduced.

Claims (10)

1. The utility model provides a forced circulation energy-conserving fermentation cylinder that flows which characterized in that: a sleeve concentric with the fermentation tank is arranged in the fermentation tank; the lower part of the sleeve is fixed at the bottom of the fermentation tank, and the upper part of the sleeve is open and is positioned below the liquid level;
the device comprises a sleeve, a Venturi tube and a fluid pump which are used for mixing fermentation liquor and air are arranged below the sleeve, the upper portion of the Venturi tube is communicated with the sleeve, the lower portion of the Venturi tube is connected with the outlet end of the fluid pump, the inlet end of the fluid pump is connected with a heat exchanger in series and communicated with the fermentation liquor outside the sleeve, a small barrel is arranged at the top of a fermentation tank, a defoaming paddle is arranged at the lower portion of the small barrel, an exhaust pipe is led out from the side face of the upper portion of the small barrel, the fermentation liquor inside and outside the sleeve is forced to be subjected to gas-liquid mixing and circulating flow through the fluid pump and the Venturi tube and is subjected to forced cooling through the heat exchanger, when foam formed in the process reaches the small barrel on the top of the tank, the foam is broken by the defoaming paddle and is subjected to gas-liquid separation, liquid goes down to return to the liquid level, and the gas is exhausted out of the tank through the exhaust pipe.
2. The forced circulation energy-saving fermenter according to claim 1, wherein: the venturi tube below the sleeve is internally provided with a nozzle, fermentation liquor outside the sleeve strongly passes through the nozzle by pressurization of the fluid pump, negative pressure is formed under the action of the injection, air from the fan is sucked, the generated gas-liquid mixture enters the sleeve of the fermentation tank, and the gas-liquid mixture is forced to circularly flow in the sleeve from bottom to top and outside the sleeve and then sucked into the fluid pump.
3. The forced circulation energy-saving fermenter according to claim 1, wherein: the fluid pump arranged below the Venturi tube adopts a centrifugal pump, an axial flow pump, a rotor pump, a gear pump, a screw pump and a piston pump which are provided with high-temperature-resistant seals, or a corresponding canned motor pump and an electromagnetic pump.
4. The forced circulation energy-saving fermenter according to claim 1, wherein: at least one pair of symmetrical notches is formed in the bottom of the sleeve in the fermentation tank, so that fermentation liquor inside and outside the sleeve can circulate.
5. The forced circulation energy-saving fermenter according to claim 1, wherein: and a heat exchanger of fermentation liquor and a cooling water channel is connected in series on a pipeline connecting the fermentation liquor outside the sleeve and the inlet end of the fluid pump and is used for carrying out forced cooling outside the tank on the fermentation liquor.
6. The forced circulation energy-saving fermenter according to claim 5, wherein: the heat exchanger is a double-pipe heat exchanger, a tubular heat exchanger, a baffle plate heat exchanger or a spiral plate heat exchanger.
7. The forced circulation energy-saving fermenter according to claim 1, wherein: the top of the small cylinder body is provided with a small motor directly connected with the rotating shaft of the defoaming paddle, the side surface of the upper end of the small cylinder body is provided with an exhaust pipe, and the exhaust pipe is provided with an exhaust valve with an inlet end provided with a small exhaust valve.
8. The forced circulation energy-saving fermenter according to claim 7, wherein: a foam probe inserted into the fermentation tank is arranged beside the small cylinder body on the tank top, a detection signal is coupled with a motor switch which drives the defoaming paddle to rotate above the small cylinder body, the motor is automatically started once a foam signal exists, the defoaming paddle rotates at a high speed, foam is pressed and eliminated, and the motor is automatically turned off after the foam descends.
9. The forced circulation energy-saving fermenter according to claim 1, wherein: the lateral surface of the Venturi tube is connected with an air pipeline at the outlet of the fan through a check valve, so that fermentation liquor is prevented from entering the air pipeline and the fan.
10. The forced circulation energy saving fermenter according to claim 9, wherein: the check valve with connecting tube below between the venturi is equipped with a venturi zymotic fluid blow-down valve, heat exchanger with connecting tube below between the fluid pump entry is equipped with an exchanger zymotic fluid blow-down valve, and the entry end of two blow-down valves has little steam extraction valve for after the fermentation is finished with the inside and outside zymotic fluid of sleeve emit and when making things convenient for the sterilization little steam extraction.
CN202111388073.9A 2021-11-22 2021-11-22 Forced circulation flow energy-saving fermentation tank Pending CN114085753A (en)

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