Corn Flour Cooking Mash In A Vertical Tube Falling Film Flow And Distribution Of Research

The basic theory and technology of biology have being advanced and efficient biocatalysts constantly have emerged since 1970s', which lead to that the heat and mass transfer of the biological solution become limit factors in the process of the biology technology industrialization, especially in the aspect of the throughput of biology reactors. Besides, the latest progresses of bioengineering focus on the genetic engineering mostly, the lower processing engineering isn t paid enough attention to, but the lower extraction processing engineering constitutes more than 60% of the production cost. As is known to all, the concentration of biology substance which can be extracted in the culture solution is often very low, moreover, the culture solution often shows non-Newtonian fluid characteristics, its apparent viscosity is higher, the products are mostly thermal sensitive and very unsteady, they are easy to devitalize or decompose in the operations such as vaporization or enrichment. Therefore, it is very important to research the non-Newtonian fluid characteristics of the bioengineering solution and develop the equipment that is suitable to vaporize and concentrate the solution.In the modern industries, corn powder which has taken place of cassava powder becomes the basic part of the liquid culture medium, and the non-Newtonian fluid characteristics of its cooking liquor shows no difference from that of the culture solution. Its non-Newtonian-liquid characteristics have a great effect on the delivery, heat transfer and main fermentation course of the culture solution. In the chemical industry, the falling-film evaporator that is used widely has the unique performance of heat and mass transfer, and it is more suitable to treat the thermal sensitive and high viscosity solution. So, the a new methods is put forward in the article, that is taking corn powder cooking liquor as the biology solution and using the falling-film evaporator to evaporate, concentrate the solution and process, extract the final fermented products. The core of the falling-film evaporator is the liquid distributor, therefore, it is the key to the new methods to develop or research the distributor suited to distribute the non-Newtonian liquid of the biology culture solution. From this, in the experiment, the corn powder used by He Nan Tian Guan group to ferment to produce alcoholic, is taken as thematerial. On the term of the intermittent cooking process, corn powder cooking liquor is made, and its non-Newtonian fluid characteristics are researched. It is taken as the falling-film liquor, and some liquid distributors are developed and researched in the experiment, in expectation of providing the theory guidance for the practical productions.The experiment includes two main parts and a prolongation part, the main parts include the rheology research of the corn powder cooking liquor and development research of the liquor distributor; the prolongation part includes the rheology research of cassava powder cooking liquor and the applied research of the liquor distributor. The rheology experiment of the corn powder cooking liquor mainly analyses and research the rheology relation, the relation between the rheology parameters and the partition solution concentration, the temperature of the corn powder cooking liquor of which concentration is respectively 6 percent, 8 percent, 10 percent, 12 percent and 14 percent on different temperatures. The experiment of the liquid distributor mainly researches the distributing performance of three types, ten different structure dimension distributor and the effect which the vertical forced interval and the horizontal forced interval respectively has on the distributing performance, besides, the experiment analyses the effect which the rheological parameters have on the distributing performance by generalized Reynolds number. The rheology experiment and the liquid distributor applied experiment of cassava powder cooking liquor mainly research the rheological characteristics and the distributing performance of...