A new structure of a combined dust collector, in the unified energy field of which suspended particles are separated in interacting swirling flows, with subsequent aftercleaning of the gas by filtration has been developed. The hydraulic resistance of the combined dust collector has been investigated. The change in the pressure loss as a function of the total rate of flow of the gas in the apparatus and the flow-rate ratio has been determined. The dependence for calculation of the hydraulic resistance of this dust collector has been obtained.Inertial gas collectors, mechanical and electric filters, and apparatuses whose action is based on the use of thermal, magnetic, diffusional, acoustic, and other mechanisms of deposition and their different combinations are used in aspiration and pneumatic-transport systems at enterprises of the food industry and other industries of the national economy [1,2]. The most widespread are inertial apparatuses for dry and wet cleaning of the gas from dust; preference is given to dry dust collectors.Among the existing principles of inertial dust collecting, the most efficient and perfect is that of separation of dust in the centrifugal field. Cyclones in which this technique is realized are representative of the most widespread dust-collecting equipment at present. They are easy to manufacture, operate, and maintain.The required efficiency of cleaning of gases in collection of a coarse fraction (30-40 µm) is ensured in cyclones. In separation of a fine dust, particularly when its concentration is high, they act as the apparatus of precleaning of the gas and are used as the first stage of a gas-cleaning unit.The technique of separation of suspended particles in swirling counterflows enables one to overcome the energy level of centrifugal cleaning of gases in a traditional cyclone. Numerous vortex dust collectors different in structure and having a number of advantages over cyclones have been created based on it [3][4][5][6][7][8]. However, in collection of particles less than 8 µm, the efficiency of cleaning of the gas in vortex gas collectors is reduced.Combined dust collectors -filter cyclones -and dust-collecting systems consisting of two or more apparatuses placed in series are used at enterprises of the food industry to isolate a fine dust from a gas flow. Inertial dust collectors of differential structures are used as the first stage of cleaning. At the final stage, filters are placed for fine cleaning of the gas. Such systems ensure the required efficiency but are characterized by a large specific quantity of metal and a high energy consumption, most of which is accounted for by the filters. This is attributed to their structural complexity, the limited service life of the filter material, and the necessity of regenerating it [9,10].Filter cyclones are less metal-intensive. However, the dust load on the filter cloth in the cyclone remains fairly large at the first stage because of the comparatively low efficiency of collecting of dust.We have developed a fundamentally new struc...
The need to develop the technology of liquid acid-forming ferments using bacterial concentrates for the production of national types of bread in discrete mode was shown. The choice of bacterial concentrates was based on the optimal pH (4.5 – 5.5) and temperature (30ºC – 40ºC) of flour nutrient substrates, which are necessary to ensure the directed cultivation of microorganisms in the technology of liquid acid-forming ferments. The choice of bacterial concentrates was based on the maximum acidity that microorganisms could provide after two days of cultivation and which should be in the range of 100 to 180 degrees of Turner. The use of Belarusian bacterial concentrates on the basis of the comparative characteristics was proposed. Flour nutrient substrates for the cultivation of microorganisms from bacterial substrates have been proposed. They contained traditional components (rye flour, rye malt) and components for stimulation of activity of microorganisms from bacterial concentrates (dairy whey in liquid form, Echinaceae purpurea herba). The choice of the ratio between the components was based on the peculiarities of the technology of production of national types of bread and the possibility of providing microorganisms from bacterial concentrates with the necessary nutrients. Microorganisms of bacterial concentrate "IM-pro 1" (a consortium of dried lactic acid bacteriums and bifidobacteriums) using the proposed flour nutrient substrates during cultivation had the best activity for a shorter period of cultivation. This made it possible to propose the use of this bacterial concentrate as a source of microorganisms in liquid acid-forming ferments for national types of bread and to ensure the preparation in one stage.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.