Airflow impact type gas-liquid-solid three-phase mixer for fermentation tank

Abstract

The utility model discloses an airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank, and relates to the technical field of mixers. The device comprises a mixing pipe, a diffusion port, three conical nozzles, an L-shaped connecting pipe and an incidence pipe, a three-nozzle structure is adopted, the center lines of the conical nozzles are subjected to hedging and impacting according to an oblique angle of 45 degrees, a large mixing pipe is adopted to provide a higher liquid-gas ratio, three air flows are wound upwards in the mixing pipe after being impacted with liquid, fully-mixed three-phase flow is discharged from a diffusion opening, and optimal transfer of momentum is achieved; first-time jet shearing is achieved through high-speed flow of the conical nozzle, second-time impact fragmentation is completed through mixed flow impact, and third-time dragging shearing is completed through cyclone flow formed by winding up three strands of flow in the mixing pipe; the maximum transfer of momentum is realized at an outlet flaring of the mixer; the impact type fermentation gas-liquid-solid three-phase mixer can realize higher turbulent flow mixing and shearing, crush bubbles to a lower scale, and improve a higher mass transfer coefficient KLa for a fermentation reactor.

Description

Technical Field

[0001] The utility model belongs to the technical field of mixers, in particular to an airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank. Background Art

[0002] With the innovation and progress of strains and processes of various fermentation products, the fermentation level has been greatly improved; especially at the molecular level and cellular level, there have been certain breakthroughs. However, due to the constraints of engineering level, the traditional stirred ventilation fermentation reactor has obviously restricted the progress of fermentation; with the development of engineered bacteria and the progress of synthetic biology, the ventilation fermentation characterized by high-density development of Escherichia coli, Bacillus subtilis and yeast has higher and higher requirements on engineering level, and the traditional stirred ventilation reactor has become more and more constrained.

[0003] Therefore, this technical solution relies on the practical advancement of high mass transfer circulating fermenters and self-mixing circulating fermenters in various products, and has developed a fermentation impact-type fermentation gas-liquid-solid three-phase mixer to meet the needs of high-intensity fermentation, which has better mixing and mass transfer characteristics. Utility Model Content

[0004] The utility model provides an airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank, which adopts a three-nozzle structure, and the center lines of the conical nozzles collide at a 45-degree angle. A large mixing tube is used to provide a higher liquid-gas ratio. After the three airflows collide with liquid, they spiral upward in the mixing tube, and the fully mixed three-phase flow is discharged from the diffuser port, thereby achieving the best transfer of momentum; the high-speed flow of the conical nozzle realizes the first injection shearing, the collision of the mixed flow completes the second impact fragmentation, and the cyclone flow of the three flows spiraling upward in the mixing tube completes the third drag shearing; the maximum transfer of momentum is achieved at the expansion port of the mixer outlet; the impact type fermentation gas-liquid-solid three-phase mixer can achieve higher turbulent mixing shear, crush the bubbles to a lower scale, and increase the mass transfer coefficient KLa for the fermentation reactor; in summary, the problems in the background technology are solved.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses an airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank, comprising a mixing tube, an outward-expanding pressure expansion port arranged at the upper part of the mixing tube, three conical nozzles arranged around the bottom of the mixing tube, an L-shaped connecting pipe connected to the conical nozzle, and an incident pipe arranged at the center of the bottom of the mixing tube and connected to the three L-shaped connecting pipes;

[0007] The conical nozzle is tapered from the end connected to the L-shaped connecting pipe forward, and the central axis of the conical nozzle forms an angle of 45° with the central axis of the mixing pipe.

[0008] Furthermore, the bottom of the mixing tube is an open nozzle.

[0009] Furthermore, the upper edge of the conical nozzle is flush with the inner diameter of the mixing tube.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The impact-type fermentation gas-liquid-solid three-phase mixer of the utility model adopts a three-nozzle structure, and the center lines of the conical nozzles collide at a 45° angle. A large mixing tube is used to provide a higher liquid-gas ratio. After the three airflows collide with liquid, they spiral upward in the mixing tube and discharge the fully mixed three-phase flow from the diffuser port, thereby achieving the best transfer of momentum. The high-speed flow of the conical nozzle realizes the first injection shearing, the collision of the mixed flow completes the second impact fragmentation, and the cyclone flow spiraling upward of the three flows in the mixing tube completes the third drag shearing. The maximum transfer of momentum is achieved at the expansion port of the mixer outlet. The impact-type fermentation gas-liquid-solid three-phase mixer can achieve higher turbulent mixing shear, crush the bubbles to a lower scale, and increase the mass transfer coefficient KLa for the fermentation reactor.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic structural diagram of an airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank of the utility model;

[0015] Figure 2 for Figure 1 A top view of the structure;

[0016] Figure 3 for Figure 1 Middle AA section;

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1-mixing tube, 2-diffuser, 3-conical nozzle, 4-L-type connecting pipe, 5-injection pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that terms such as "upper", "bottom", "peripheral", "surrounding", "central position", "central axis" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present invention.

[0021] The application scenarios of the impact type gas-liquid-solid three-phase mixer of this technical solution are:

[0022] In the experimental tank device, under the conditions of constant air volume, constant temperature and constant pressure, the sodium sulfite solution oxidation experiment was carried out, and the mixer performance was determined; DO (dissolved oxygen) and tail gas oxygen concentration were continuously measured, and the continuous characteristic curve of the impact three-phase mixer was drawn, as well as the curves of OTR (oxygen supply), KLa, DO, tail gas oxygen concentration, sodium sulfite consumption rate, and oxygen utilization rate; the excellent performance further broadened the suitability of fermentation products, and according to the characteristics of different fermentation products for shear requirements, it can better adapt to and meet the further improvement of the fermentation level of some fermentation products.

[0023] Relying on the practical promotion of high mass transfer circulating fermenters and self-mixing circulating fermenters in various products, we have developed a fermentation impact fermentation gas-liquid-solid three-phase mixer to meet the needs of high-intensity fermentation, and completed series standardization. This series of three-phase mixers has better mixing and mass transfer characteristics.

[0024] See also Figure 1-3 As shown, the utility model is an airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank, comprising a mixing tube 1, an outward expansion pressure expansion port 2 arranged at the upper part of the mixing tube 1, three conical nozzles 3 arranged around the bottom side of the mixing tube 1, an L-shaped connecting pipe 4 connected to the conical nozzle 3, and an incident pipe 5 arranged at the center of the bottom of the mixing tube 1 and connected to the three L-shaped connecting pipes 4;

[0025] The conical nozzle 3 is tapered from the end connected to the L-shaped connecting pipe 4 to the front, and the central axis of the conical nozzle 3 forms an angle of 45° with the central axis of the mixing pipe 1 .

[0026] The bottom of the mixing tube 1 is an open nozzle.

[0027] The upper edge of the conical nozzle 3 is flush with the inner diameter of the mixing tube 1;

[0028] The impact-type fermentation gas-liquid-solid three-phase mixer adopts a three-nozzle structure. The center lines of the conical nozzles collide at a 45° angle. A large mixing tube is used to provide a higher liquid-gas ratio. After the three airflows collide with liquid, they spiral upward in the mixing tube and discharge the fully mixed three-phase flow from the diffuser port, achieving the best transfer of momentum. The high-speed flow of the nozzle realizes the first injection shearing, the collision of the mixed flow completes the second impact fragmentation, and the cyclone flow of the three flows spiraling upward in the mixing tube completes the third drag shearing; the maximum transfer of momentum is achieved at the expansion of the mixer outlet. The impact-type fermentation gas-liquid-solid three-phase mixer can achieve higher turbulent mixing shear, crush the bubbles to a lower scale, and increase the mass transfer coefficient KLa for the fermentation reactor.

[0029] The conical nozzle of this design adopts CNC machined precision parts, the welding opening adopts laser drilling, the mixing tube and pipe fittings adopt polished stainless steel pipes and pipe fittings of national standard series, the parameters are centered on KLa and OTR, and the manufacturing cost is minimized. A series of impact-type gas-liquid-solid three-phase mixers are established, including 5 series of impact-type special three-phase mixer standards: ZJ70-3X (6-10mm series), ZJ80-3X (6-11mm series), ZJ100-3X (6-12mm series), ZJ125-3X (6-13mm series), and ZJ150-3X (6-14mm series); the corresponding mm in brackets is the size of the front and rear diameters of the conical nozzle. According to the fermentation characteristics and air volume of various products, multiple branches are arranged at the bottom of the self-mixing circulation fermenter or the high mass transfer circulation fermenter, which can fully meet the aerobic needs of the whole fermentation process of different biological kingdoms, different bacterial genera, and different products.

[0030] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank, characterized in that: It comprises a mixing tube (1), an outward-expanding pressure diffusion port (2) arranged at the upper part of the mixing tube (1), three conical nozzles (3) arranged around the bottom side of the mixing tube (1), an L-shaped connecting tube (4) connected to the conical nozzle (3), and an injection tube (5) arranged at the center of the bottom of the mixing tube (1) and connected to the three L-shaped connecting tubes (4); The conical nozzle (3) is tapered from the end connected to the L-shaped connecting pipe (4) to the front, and the central axis of the conical nozzle (3) forms an angle of 45° with the central axis of the mixing pipe (1).

2. The airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank according to claim 1, characterized in that: The bottom of the mixing tube (1) is an open tube opening, and solid and liquid enter from the bottom of the mixing tube (1).

3. The airflow impact type gas-liquid-solid three-phase mixer for a fermentation tank according to claim 1, characterized in that: The upper edge of the conical nozzle (3) is flush with the inner diameter of the mixing tube (1).

Images