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Fermentation liquor de-foaming and stirring device and fermentation tank provided with fermentation liquor de-foaming and stirring device

A stirring device and fermentation tank technology, which is applied in the fields of fermentation tanks, defoaming devices, and fermentation liquid defoaming and stirring devices, and can solve problems such as poor effect

Inactive Publication Date: 2013-05-15
王晓军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is to add low-carbon alcohol, mineral oil, organic polar compounds or silicone resin chemical defoamers to the fermentation broth to reduce the surface tension of the fermentation broth, thereby inhibiting or reducing the formation of foam, but due to the biological reaction to the bacteria or products There are strict requirements, and it is often impossible or undesirable to add chemical defoamers
The latter physical method is to use the principle of mechanical collision to break the foam. The commonly used one is the rake type defoaming stirring paddle. The structure is as follows: figure 1 As shown, the rake-type defoaming stirring paddle is installed on the fermentation liquid surface A above the stirring shaft 6, and the foam is broken through the rake needle B, but this method has a poor effect on the fermentation liquid surface with a lot of foam and rapid foam development

Method used

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  • Fermentation liquor de-foaming and stirring device and fermentation tank provided with fermentation liquor de-foaming and stirring device
  • Fermentation liquor de-foaming and stirring device and fermentation tank provided with fermentation liquor de-foaming and stirring device
  • Fermentation liquor de-foaming and stirring device and fermentation tank provided with fermentation liquor de-foaming and stirring device

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Experimental program
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Effect test

Embodiment 1

[0036] The fermented liquid defoaming stirring device of the present embodiment has a structure such as Figure 7 As shown, the power of the defoaming stirring system is provided by the motor 1 at the top, and the motor 1 transmits the power to the stirring shaft 6 through the reducer 2, and the stirring shaft 6 drives the defoaming paddle 8 to rotate. The frame 3 plays the role of supporting the motor and fixing the stirring shaft. The bearing assembly 4 plays the role of positioning and reducing rotation resistance. The boss 5 on the fermenter or bioreactor is an installation platform for supporting the defoaming stirring system. The keyway 7 on the stirring shaft can prevent the defoaming paddle from slipping, and the paddle locking screw 9 has the function of adjusting and positioning the defoaming paddle up and down.

[0037] The top view of the structure of the stirring shaft and the defoaming paddle is as follows: Figure 8 As shown, the main view is as Figure 9 As...

Embodiment 2

[0041] This embodiment is a fermenter equipped with the fermentation liquid defoaming and stirring device of Embodiment 1. The diameter of the fermenting tank of this embodiment is 2 meters, and the manufacturing of its defoaming and stirring blades is carried out according to the parameters in Table 1.

[0042] Table 1 Design parameters of blade rotation diameter of 300mm (unit: mm)

[0043] Blade Rotation Diameter D 300 Propeller shaft seat diameter H 37.50 blade height Q 100.00 Chord length of the small end of the blade expansion surface r 13.13 Radius of paddle circle around shaft seat m 38.20 Chord arc length of propeller unfolded surface L 220.77 Chord arc height of propeller unfolded surface h 90.85 Radius of the chord arc of the propeller unfolded surface R 112.48

[0044] In this embodiment, the fermentation liquid defoaming and stirring device is installed at 400 mm from the center of the fermenter, and ...

Embodiment 3

[0049] This embodiment is a fermenter equipped with the fermentation liquid defoaming and stirring device of Embodiment 1. The diameter of the fermenting tank of this embodiment is 5 meters, and the manufacture of its defoaming and stirring blades is carried out according to the parameters in Table 3.

[0050] Table 3 Design parameters of blade rotation diameter of 600mm (unit: mm)

[0051] Blade Rotation Diameter D 600.00 Propeller shaft seat diameter H 75.00 blade height Q 200.00 Chord length of the small end of the blade expansion surface r 26.25 Radius of paddle circle around shaft seat m 76.39 Chord arc length of propeller unfolded surface L 441.54 Chord arc height of propeller unfolded surface h 181.70 Radius of the chord arc of the propeller unfolded surface R 224.97

[0052] In this embodiment, the fermentation liquid defoaming and stirring device is installed at the center of the fermenter, and the struct...

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Abstract

The invention relates to a de-foaming device in the field of fermentation and biological engineering, and provides a fermentation liquor de-foaming and stirring device and a fermentation tank provided with the fermentation liquor de-foaming and stirring device. The fermentation liquor de-foaming and stirring device comprises a de-foaming blade mounted on a stirring shaft; the de-foaming blade consists of two same blade sheets shaped like a butterfly wing, and a blade shaft base for connecting the two blade sheets shaped like the butterfly wing; the unfolded faces of the blade sheets shaped like the butterfly wing are arc faces; one half circle is lacked at the eccentric part of each arc face; two symmetrical blade mounting curves winding the blade shaft base for 180 degrees are arranged on the blade shaft base; the lengths of the blade mounting curves are equal to the half circumference length of the eccentric half circles of the unfolded faces of the blade sheets shaped like the butterfly wing; and the blade sheets shaped like the butterfly wing are pressed to form one curve face, and are symmetrically fixed on the blade shaft base left and right along the mounting curves on the blade shaft base. The fermentation liquor de-foaming and stirring device provided by the invention can be used for effectively de-forming fermentation liquor and has a good de-foaming effect. The fermentation liquor de-foaming and stirring device has the stirring function besides the de-foaming function.

Description

technical field [0001] The invention relates to a defoaming device in the fields of fermentation and bioengineering, in particular to a defoaming and stirring device for fermented liquid and a fermenter equipped with the device. Background technique [0002] The most widely used equipment in fermentation and bioengineering is fermenter or bioreactor. During fermentation, the fermentation liquid in the tank will produce a large number of bubbles and foam due to the chemical properties of the substrate or microbial foaming bacteria. If it is not processed in time , the foam will rise rapidly and overflow the tank, causing pollution or loss of fermentation broth. This phenomenon is especially serious in the aerobic fermentation process. The general defoaming process adopts chemical or physical methods. The former is to add low-carbon alcohol, mineral oil, organic polar compounds or silicone resin chemical defoamers to the fermentation broth to reduce the surface tension of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/02C12M1/00
Inventor 王晓军
Owner 王晓军