Crushing feed grain involves hammer crushers, which are characterized by high specific energy consumption and its uneven fractional composition. It is possible to obtain high-quality shredded grain with less energy when using a centrifugal-impact crusher of the new design with a hole in the loading neck to supply the chopping chamber with additional air at a rate of up to 4.8 m/s. An additional hole provides a 1.8...13-time increase in the airspeed through the unloading neck when the rotor's rotation frequency changes from 3,750 to 2,250 min-1 , thereby enabling the timely evacuation of the shredded material from the crusher. The regression equations have been derived to determine the structural and regime parameters of the shredder, which ensure the maximal performance and minimal unit energy costs. The greatest impact on crusher productivity is exerted by the diameter of the sieve holes and the area of the bunker's unloading window. The greatest effect on the specific energy intensity of the grinding process is exerted by the diameter of the sieve holes. The maximal performance of the crusher, 1,440 kg/h, and the minimal energy capacity, taking into consideration the achieved grinding degree, of 2.1 W•s/(kg•grinding degree unit), are observed when using a sieve with the holes' diameter of 7 mm, the rotor's rotation frequency of 3,500 min-1 , and the maximally open unloading window of the bunker, at F = 1.458 m 2 •10-3. The specific energy consumption for chopping barley is less by 1.22...1.89 times than that of the hammer crushers RVO 35, DB-5, KD-2A. The dust-like fraction is less than 5.74 %, which is half the amount of the hammer crusher DM-6. The rational crusher operation modes have been determined in order to prepare feed grain for feeding farm animals of different species and ages
The use of powdered concentrates increases the digestibility of feed components by the animal body. The biological activity of organic products increases due to the intensification of the process of useful substances extraction from them. The scientific basis for the formation of nanotechnologies is system effects, as well as features of physical, mechanical and biochemical phenomena that occur in powdered materials at the atomic and molecular levels and provide a synergistic effect. Using modern analytical tools in the field of nanoparticle research, a method for conducting search experiments has been developed, which provides for the possibility of studying the transformations occurring in the deep layers of substances and trace elements. Fine fractions participate in the formation of the structure of the final product, act as its leavening agents and sweeteners, as well as absorbers of excess moisture contained in raw materials. Hypersonic grinding using quantum aerogravity technology has shown the applicability, scientific and technical significance and prospects of this direction in the development of the powder industry.
Drinking water is the most valuable resource for human life and for the existence of all life on Earth. Scientists predict that about half of the world's population will experience water shortages by 2030. Purification of fresh water from contamination to the required quality standards is one of the most demanded engineering tasks. Taking into account the prevailing hydrogeological conditions, the removal of dissolved iron from the water of underground horizons is more in demand. Iron removal technology includes the use of oxidizing agents: oxygen, chlorine, potassium permanganate and ozone. It is ozone, due to its high oxidizing potential - 2.07 V, that has become worldwide in industrial water treatment systems, where it is generated using a corona discharge. But in water purification systems of low productivity, up to 1000 l / h, ozone is practically not used, due to the high cost of such generators. The Sterlight S8Q-OZ lamp was proposed as an alternative for ozone generation. According to the manufacturer's data, the lamp can produce ozone in a concentration of 1.59 to 2.82 mg / l when an air flow of 141.5 to 28.3 liters per hour passes through it. A new technological scheme was developed for deferrization of water in a stream using ozone generated by an ultraviolet lamp or a block of lamps. The installation contains an injector, an improved mixing chamber with a bottom inlet of the ozone-air mixture with Pall rings, a sand-gravel filter, an ultraviolet sterilizer lamp. The design feature was that small doses of ozone produced from the air under the influence of ultraviolet radiation with a length of 185 nm oxidized the iron dissolved in water. As a result of the tests carried out, the iron content in the source water was reduced from 2.58 mg / l to 0.02 mg / l, which is 10.0 times lower than the maximum permissible values of the EU sanitary requirements and 15.0 times lower than the maximum permissible values of sanitary requirements of the Russian Federation and the USA. It has also been noted that iron oxidation is significantly improved in the presence of 10% STIROX catalyst based on total backfill.
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