scholarly journals Study of the Quality of Barley Cleaning with Indented Cylinder from Grain Impurities

2021 ◽  
Vol 16 (3) ◽  
pp. 321-325
Author(s):  
Nikolay Petrovich Tishaninov ◽  
Alexander Vitalyevich Anashkin ◽  
Haider Jameel Alshinayyin ◽  
Konstantin Nikolayevich Tishaninov

Results of the study on the separation of crushed barley grains from the grain mixture along the length of the cell surface of indented cylinder, depending on the initial impurity concentration (Zi), the speed mode of the indented cylinder (n) and the lifting angle of the upper edge of the front wall of the output tray (γn) relative to the horizon, are presented. The theoretical steadily decreasing trend in the intensity of the impurity component separation has been experimentally confirmed. The fact that crushed barley grains are a difficult-to-separate impurity has been established. When n increases, the intensity of impurity separation increases dramatically. The γn angle increases the dependence of the process dynamics on the speed mode. At γn =55°, the increase of n from 40 to 50 rpm increases the intensity of impurity separation from the grain mixture by 6.44 times. A decrease in the value of γn and an increase in the speed mode of operation lead to an increase in process losses. An increase in the initial contamination of the grain mixture under other equal operating conditions of the indented cylinder leads to a proportional increase in its residual contamination.

2021 ◽  
pp. 71-75
Author(s):  
Н.П. Тишанинов ◽  
А.В. Анашкин ◽  
К.Н. Тишанинов ◽  
Х.Д.Д. Альшинайиин

Представлены результаты исследований физико-механических свойств компонентов зерносмеси, динамики и качества выделения примеси из неё в зависимости от скоростного режима работы триера (n) и угла подъёма верхней кромки передней стенки выводного лотка (γn). Подтверждён лавинообразный характер выделения проса из ячменя в первых интервалах времени измерений за счёт эффекта динамической сегрегации примеси в циркулирующих слоях зерносмеси. Положительный вектор сегрегации проса (вниз – к ячеистой поверхности) объясняется значительной его насыпной плотностью, гладкой поверхностью – угол естественного откоса составляет 20,3° (в 1,8 раза меньше, чем у ячменя), компактными размерами зерновок и их округлой формой. Установлена высокая степень влияния на интенсивность выделения примеси скоростного режима – при приросте n на 12,5% (от 40 до 45 об/мин) выделенная масса примеси в первом интервале времени измерений (tи = 5 с) увеличилась на 125%. При γn= 35° степень выделения примеси (и остаточная засорённость) обеспечиваются на высоком уровне стандартной длиной ячеистого цилиндра (l = 2,2 м) во всём диапазоне скоростного режима работы стенда n = 40…55 об/мин. С ростом γn до 45º сужается диапазон скоростного режима работы по качественным показателям до n = 45…55 об/мин, а при γn= 55º качество работы обеспечивается только при n = 50…55 об/мин. При γn= 45…50º и n = 50…55 об/мин 100%-ное выделение примеси обеспечивается за 30…35 с смещения сегмента зерносмеси по длине ячеистого цилиндра. При этом его рабочая длина используется лишь на 55…64%. Технологические потери на всех исследуемых режимах работы не превышают 0,3% и носят случайный характер, что объясняется неопределённостью условий выброса зерновок ячменя ячеями. The research results of physical and mechanical properties of grain mixture components, dynamics and quality of impurity extraction from it are presented depending on the speed mode of operation of the trieur (n) and the lifting angle of the upper edge of the front wall of the lead tray (γn). Avalanche-like character of millet separation from barley in the first intervals of measurement time is confirmed due to effect of dynamic segregation of impurity in circulating layers of grain mixture. The positive vector of millet segregation (down to the cellular surface) is explained by its significant poured density, a smooth surface – the angle of friction is 20.3° (1.8 times less than that of barley), compact bruchid sizes and their rounded shape. A high degree of influence on the rate mode impurity release intensity was established – at an increase of n by 12.5% (from 40 to 45 rpm), the extracted impurity mass in the first measurement time interval (tи = 5 s) increased by 125%. At γn = 35°, the degree of impurity release (and residual content of impurities) is provided at a high level by the standard length of the cellular cylinder (l = 2.2 m) in the entire range of the speed mode of the bench n = 40...55 rpm. With an increase in γn to 45º the range of the high-speed mode of operation is narrowed to n = 45...55 rpm, and at γn = 55º the quality of operation is ensured only at n = 50...55 rpm. At γn = 45...50° and n = 50...55 rpm 100% impurity release is ensured by 30...35 second with displacement of the grain mixture segment along the length of the cellular cylinder. At the same time, its working length is used only on 55...64%. Technological losses in all investigated modes of operation do not exceed 0.3% and are random in nature, which is explained by the uncertainty of the conditions for the release of barley bruchids by cells.


1990 ◽  
Vol 22 (1-2) ◽  
pp. 347-352 ◽  
Author(s):  
C. Paffoni ◽  
B. Védry ◽  
M. Gousailles

The Paris Metropolitan area, which contains over eight million inhabitants, has a daily output of about 3 M cu.meters of wastewater, the purification of which is achieved by SIAAP (Paris Metropolitan Area Sewage Service) in both Achères and Valenton plants. The carbon pollution is eliminated from over 2 M cu.m/day at Achères. In order to improve the quality of output water, its tertiary nitrification in fixed-bed reactors has been contemplated. The BIOFOR (Degremont) and BIOCARBONE (OTV) processes could be tested in semi-industrial pilot reactors at the CRITER research center of SIAAP. At a reference temperature of 13°C, the removed load is approximately 0.5 kg N NH4/m3.day. From a practical point of view, it may be asserted that in such operating conditions as should be at the Achères plant, one cubic meter of filter can handle the tertiary nitification of one cubic meter of purified water per hour at an effluent temperature of 13°C.


1992 ◽  
Vol 25 (4-5) ◽  
pp. 399-400 ◽  
Author(s):  
L. Cingolani ◽  
M. Cossignani ◽  
R. Miliani

Statistical analyses were applied to data from a series of 38 samples collected in an aerobic treatment plant from November 1989 to December 1990. Relationships between microfauna structure and plant operating conditions were found. Amount and quality of microfauna groups and species found in activated sludge proved useful to suggest the possible causes of disfunctions.


Author(s):  
H.M. Magid

Purpose: In this study, plasma arc cutting (PAC) is an industrial process widely used for cutting various away types of metals in several operating conditions. Design/methodology/approach: It is carried out a systematic or an authoritative inquiry to discover and examine the fact, the plasma cutting process is to establish the accuracy and the quality of the cut in this current paper assessed a good away to better the cutting process. Findings: It found that the effect of parameters on the cutting quality than on the results performed to accomplish by statistical analysis. Research limitations/implications: The objective of the present work paper is to achieve cutting parameters, thus the quality of the cutting process depends upon the plasma gas pressure, scanning speed, cutting power, and cutting height. Practical implications: The product of the plasma cutting process experimentally has been the quality of the cutting equipment that was installed to monitor kerf width quality by exam the edge roughness, kerf width, and the size of the heat-affected zone (HAZ). Originality/value: The results reveal that were technically possessed of including all the relevant characteristics, then a quality control for the cutting and describe the consequence of the process parameters.


Author(s):  
R.A. Gasumov ◽  
◽  
E.R. Gasumov ◽  

The article discusses the modes of movement of gas-liquid flows in relation to the operating conditions of waterlogged gas wells at a late stage of field development. Algorithms have been developed for calculating gas well operation modes based on experimental work under conditions that reproduce the actual operating conditions of flooded wells of Cenomanian gas deposits. The concept of calculating the technological mode of operation of gas wells with a single-row elevator according to the critical velocity of the upward flow is considered based on the study of the equilibrium conditions of two oppositely directed forces: the gravity of water drops directed downward and the lifting force moving water drops with a gas flow directed upward. A calculation was made according to the method of the averaged physical parameters of formation water and natural gas in the conditions of flooded Cenomanian gas wells in Western Siberia. The results of a study of the dependence of the critical flow rate of Cenomanian wells on bottomhole pressure and diameter of elevator pipes are presented.


2015 ◽  
Vol 35 (6) ◽  
pp. 1042-1052 ◽  
Author(s):  
Jhonatan D. Cavalieri ◽  
Carlos G. Raetano ◽  
Ronaldo P. Madureira ◽  
Lais L. Q. Moreira

ABSTRACT Tractor traveling speed can influence the quality of spraying depending on the application technology used. This study aimed to evaluate the droplet spectrum, the deposition and uniformity of spray distribution with different spraying systems and traveling speeds of a self-propelled sprayer in two phenological stages of the cotton plant (B9 and F13). The experimental design was randomized blocks and treatments were three spraying techniques: common flat spray tips; tilted flat jet with air induction, at 120 L ha-1; and rotary atomizer disk, 20 L ha-1, combined with four traveling speeds: 12, 15, 18 and 25 km h-1, with four replications. Spraying deposition was evaluated for both leaf surfaces from the cotton plant apex and base (stage B9) and middle part of the plant (stage F13) with a cupric marker. A laser particle analyzer also assessed the droplet spectrum. The centrifugal power spray system produces more homogeneous droplet spectrum and increased penetration of droplets into the canopy in both phenological stages. Variation on the operating conditions necessary for increased traveling speed negatively influences the pattern of spraying deposits.


1993 ◽  
Vol 21 (3) ◽  
pp. 280-283 ◽  
Author(s):  
A. W. Ross ◽  
C. Greenhalgh ◽  
D. P. McGlade ◽  
I. G. Balson ◽  
S. C. Chester ◽  
...  

One hundred and forty-four patients receiving subarachnoid anaesthesia for caesarean section were prospectively analysed for quality of anaesthesia and the occurrence of post dural puncture headache (PDPH). Anaesthesia was administered via 24 gauge Sprotte (n = 104) and 26 gauge Quincke (n = 40) needles using hyperbaric bupivacaine 0.5% with morphine 0.2 mg. Anaesthesia was successful in 103 patients with the Sprotte needle and 38 patients with the Quincke needle, and the operating conditions were considered to be excellent. Of the 104 patients in the Sprotte needle group there were ten with PDPH (9.6%), two of which were considered severe. Of the 40 patients in the Quincke needle group there were eight with PDPH (20%), three of which were considered severe. Despite the lower incidence of headache in the Sprotte needle group, this was not statistically significant (P>0.05), due to the difference in population size. We conclude that the 24 gauge Sprotte needle is associated with a comparatively low but clinically relevant incidence of headache in the obstetric population.


2018 ◽  
Vol 14 (2) ◽  
pp. 141-148
Author(s):  
Deniss Brodņevs ◽  
Aleksandrs Kutins

AbstractWell-deployed cellular networks offer a cheap wireless solution for the control channel deployment of Remote-Control Vehicles (RCV) and Unmanned Aerial Vehicles (UAV). However, a cellular data transfer service performance is affected by a different kind of User Equipment (UE) mobility. Operating conditions of UAV imply working at different altitudes, variable velocities with accelerations/decelerations and rapidly changed antennas angular position, which lead the wireless signal to be prone to negative effects. Available field measurement studies are not sufficient to provide excessive information on degradation problem causes for UEs moving along a complex trajectory. This paper presents an evaluation of the service quality of live operational 3G and LTE networks for both ground moving and flying UE. It has been found that antennas angular position variations in 3D (for example, during UAV manoeuvers) increase data transfer latency and jitter. Moreover, this effect in conjunction with higher interference at high altitudes may partially or fully block the data transfer service. This paper has been prepared to draw attention to the problem that makes the cellular data transfer service unusable for highly-manoeuvrable UAVs.


2019 ◽  
Vol 26 (01) ◽  
pp. 157-162
Author(s):  
Davaasuren G ◽  
Gantulga G

It is vitally important for vehicle users that are to study the operating regime that may negative effect to the operation of the engine, to reduce its effect, to maintain the engine's reliability in accordance with the specific operating conditions. Quality of lubrication is one of the main factors that are improving of reliability and operational efficiency for any machinery their spare parts. So this paper presents to optimize of oil change intervals and to determine of wear rating of spare parts by content of metal particles in the internal combustion engine used oil. Дотоод шаталтат хөдөлгүүрийн тос солих хугацааг оновчлох нь Хураангуй:  Машин ашиглагчдын хувьд тухайн хөдөлгүүрийн ажиллагаанд сөрөг нөлөө үзүүлэх  ашиглалтын горимыг судалж, түүний хор нөлөөг багасгах болон ашиглалтын өвөрмөц  нөхцөлд тохируулан хөдөлгүүрийн найдварт ажиллагааг ханган зөв, ашигтай ажиллуулах  чадвартай байх нь асар их ач холбогдолтой юм. Аливаа машин техник , тэдгээрийн агрегат,  зангилаа эд ангийн удаан эдлэхүй, найдвартай ажиллагааг хангах, ашиглалтын үр ашгийг  дээшлүүлэх гол хүчин зүйлүүдийн нэг нь тосолгооны чанар байдаг учраас дотоод шаталтат  хөдөлгүүрийн ашигласан тосон дахь металлын агууламжыг илрүүлж, эд ангийн элэгдлийн  явцыг тодорхойлон, тос солих хугацааг оновчлох асуудлыг судалгааны хүрээнд авч үзлээ.  Түлхүүр үг: Хөдөлгүүрийн ашигласан тосны шинжилгээ, металл хольц, тосны бохирдол,  тортог, элэгдлийн элементийн хязгаар 


2012 ◽  
Vol 22 (4) ◽  
pp. 417-425 ◽  
Author(s):  
Jolanta Krystek ◽  
Marek Kozik

This paper presents a generalized job-shop problem taking into consideration transport time between workstations and setups machines in deadlock-free operating conditions. The automated transportation system, employing a number of automated guided vehicles is considered. The completion time of all jobs was applied as the optimization criterion. The created computational application was used to solve this problem in which chosen priority algorithms (FIFO, LIFO, LPT, SPT, EDD and LWR) were implemented. Various criteria were used to assess the quality of created schedules. Numerical results of the comparative research were presented for various criteria and rules of the priority


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