A kind of energy-saving method for biological fermentation tank

Abstract

The invention belongs to the field of biological fermentation and discloses an energy-saving device and method for a biological fermentation tank. At present, in an air and fermentation liquid mixingprocess, oxygen dissolving efficiency is low, a great quantity of oxygen in air is discharged when not dissolved, and consequently, high compressed air waste and high compressor energy consumption accounting for 60% of total fermentation energy consumption are caused; in order to realize uniform distribution of air in fermentation liquid, the fermentation liquid needs to be stirred by a stirrer, and energy consumption of the stirrer accounts for 30% of the total fermentation energy consumption. In traditional fermentation equipment, dissolving efficiency is improved by reducing an opening diameter of an air distributor, reducing bubble generation diameter and increasing contact area of oxygen and the fermentation liquid; resistance is reduced by optimizing stirring blade shapes. Accordingto the energy-saving method, air is injected into the boundary of each blade and the fermentation liquid to form an air layer, so that viscosity of the fermentation liquid and resistance generated bythe fermentation liquid to the blades are reduced; by processing of pores in the blades, air passes through the pores to generate microbubbles, so that dissolving efficiency of oxygen in air is improved.

Description

Technical field: [0001] The invention discloses an energy-saving device and a method used in the field of biological fermentation and pharmacy. Background technique: [0002] The fermentation process is the process of producing specific products through microbial metabolism under artificial control. Most industrial microbial processes are aerobic. Oxygen, as a key substrate, plays a role in meeting the needs of microbial growth, maintenance and metabolites, and directly affects the yield of fermentation products. [0003] The solubility of oxygen in water is small, and the microorganisms in the fermentation broth continuously consume the oxygen in the water, so that the dissolved oxygen decreases. Therefore, oxygen needs to be continuously supplemented during the fermentation process. Air is usually injected into the fermentation broth to generate a large number of bubbles, so that oxygen dissolves into the fermentation broth through the surface of the bubbles. Under the p...

AI Technical Summary

Problems solved by technology

Under the pressure of the fermentation liquid, an air compressor needs to be used to pressurize the air before it is injected. At present, in the process of mixing the air with the fermentation liquid, the oxygen dissolution efficiency is low, and a large amount of oxygen in the air is discharged before it is dissolved, resulting in a large waste of compressed air. , The energy consumption of the compressor is high, accounting for more than 60% of the total energy consumption of fermentation

On the other hand, the distribution of air in the fermentation liquid is not uniform, so it is necessary to use a stirrer to stir the fermentation liquid to make the air evenly distributed, and the energy consumption of the stirrer accounts for 30% of the total energy consumption of fermentation

Images