A stirring method for improving the dissolved oxygen of fermented liquid in a liquid fermenter

A liquid fermentation and stirring method technology, applied in the field of fermentation tanks, can solve the problems of small gas specific gravity, low dissolved oxygen efficiency, low efficiency, etc., and achieve the effects of reducing shear damage and enhancing dissolved oxygen efficiency.

Active Publication Date: 2022-05-13
河北乐开节能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the existing agitator, mainly low dissolved oxygen efficiency and high energy consumption. The stronger the dispersion effect is, when the center of the fermenter gets enough dissolved oxygen, the outer edge of the stirring blade must have been in a state of excessive waste, and the transitional shearing action will also cause damage to the bacteria in the fermenter
Furthermore, due to the small specific gravity of the gas, relying on the stirring paddle to shear the bubbles to make the bubbles plug into the liquid is also very inefficient.

Method used

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  • A stirring method for improving the dissolved oxygen of fermented liquid in a liquid fermenter
  • A stirring method for improving the dissolved oxygen of fermented liquid in a liquid fermenter
  • A stirring method for improving the dissolved oxygen of fermented liquid in a liquid fermenter

Examples

Experimental program
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Effect test

Embodiment 1

[0031] see figure 2 As shown, it is a fermenter high-efficiency dissolved oxygen stirrer 10 of a preferred embodiment of the present invention, which is installed in the fermenter 20 and includes a stirring shaft 11, and the stirring shaft 11 is installed at an inclination angle α relative to the central axis L of the fermenter In the fermenter 20, the inclination angle α is 1~2° or 2~4° or 4~5°, such as figure 2 2° shown.

[0032] combine figure 1 , Figure 4 , Figure 5 As shown, the agitator 10 also includes a multi-layer blade 12, and the blade 12 is a multi-layer propeller blade. The multi-layer propeller blade 12 is that the blades 121 of each layer are arranged into one layer along the helical line, but each layer is a separate shape (such as Figure 4 ); or each blade 121 is arranged in a form connected end to end from top to bottom along a helical line (such as Figure 5 ), the paddle 12 can be provided with 1 to 10 layers, preferably 2 to 5 layers. Preferabl...

Embodiment 2

[0036] see image 3 As shown, it is a high-efficiency dissolved oxygen stirrer 10 for a fermenter in a preferred embodiment of the present invention, which is installed in a fermenter 20 and includes a stirring shaft 11. The stirring shaft 11 is relatively deviated from the central axis L of the fermenter and installed in the fermenter. In 40, the deviation D is about 2%-3% or 3-4% of the diameter of the fermenter, more preferably 1 / 40.

[0037] combinefigure 1 , Figure 4 , Figure 5 As shown, the agitator 10 of this embodiment includes multi-layer paddles 12, and the paddles 12 are multi-layer propeller blades. The multi-layer propeller blade 12 is that the blades 121 of each layer are arranged into one layer along the helical line, but each layer is a separate shape (such as Figure 4 ); or each blade 121 is arranged in a form connected end to end from top to bottom along a helical line (such as Figure 5 ), the paddle 12 can be provided with 1 to 10 layers, preferably ...

Embodiment 3

[0042] For the structural design, size and rotational speed of the blade 12 and blade 121 in this embodiment, refer to Embodiment 1-2. In this embodiment, on the basis of the above-mentioned embodiments, the stirring shaft 11 is deviated from the central axis L of the fermenter by a certain distance and installed at an inclination angle α relative to the central axis L at the same time, and the inclination angle is 1-2° or 2-4° Or 4-5°, the deviation distance D is about 2%-3% or 3-4% of the diameter of the fermenter. Since these two technical features can be combined without conflicting, conflicting or counteracting effects, the technical effects and working principles of this embodiment can be superimposed with reference to the relevant descriptions of Embodiment 1-2, which will not be tolerated here. Let me repeat.

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Abstract

The invention relates to a stirring method for increasing the dissolved oxygen of a fermented liquid in a liquid fermentation tank. A stirrer is installed in the fermenter. The stirrer is arranged in the fermenter and includes a stirring shaft, and the stirring shaft is opposite to the The central axis is installed at an inclined angle; or, the stirring shaft is installed away from the central axis of the fermenter; or, the stirring shaft is deviated from the central axis of the fermenter and installed at an inclined angle relative to the central axis. The high-efficiency oxygen-dissolving stirrer for the fermenter of the present invention greatly reduces power consumption and saves production costs for the enterprise under the condition that the dissolved oxygen degree is comparable to that of the existing stirrer.

Description

technical field [0001] The invention relates to the technical field of fermentation tanks, in particular to a stirring method for increasing the dissolved oxygen of fermentation liquid in a liquid fermentation tank. Background technique [0002] Fermentation tanks are very common equipment in the food processing industry, pharmaceutical manufacturing industry, and microalgae energy industry. Fermentation tank refers to the device used in industry for microbial fermentation. Its main body is generally a columnar cylinder made of stainless steel plate, with a volume ranging from 1 cubic meter to hundreds of cubic meters. Fermentation often has temperature requirements, so a heating or cooling device is installed outside the fermenter. Generally, a jacket is installed outside the fermenter or a heat exchange coil is installed inside and outside the fermenter. The inlet and outlet of the cold and hot medium, through the heat exchange between the heat medium and the outer wall ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/02C12M1/00
CPCC12M27/06
Inventor 赖庚音张建中陆伟新陈斌周洪杰漆旻华吕朝辉陈书菊
Owner 河北乐开节能科技股份有限公司
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