scholarly journals Investigation of the influence of the properties of the pressed material on the energy consumption and design parameters of the oil press

2021 ◽  
Vol 937 (3) ◽  
pp. 032047
Author(s):  
T Maltseva ◽  
A Olshevskaia
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Granulometric Composition ◽  
Microwave Treatment ◽  
Acid Number ◽  
Heating Power ◽  
Design Parameters ◽  
Technological Parameters ◽  
Material Heating ◽  
Insect Biomass

Abstract The article presents ways to obtain alternative sources of protein and fat from perennial crops and insects. The main properties of the material influencing the process of extracting fat from insects are considered. According to the results of the studies, the optimal technological parameters of the dried Hermetia illucens larva were revealed when pressing the fat. The optimum mass fraction of moisture is 15%. At a moisture content of insect biomass of 15%, fat filtration occurs at a pressure of 2.5 MPa. Microwave treatment of the material before pressing reduces the pressure at which the fat is squeezed out – 1.9 MPa at a material heating power of 1000 W. The intensity of heating does not significantly affect the acid number of the fat. Therefore, the most optimal heating power is 1000 W. The granulometric composition of the insect biomass also influences the fat squeezing process. Before pressing the fat, it is necessary to grind the larva to the size of particles passing through a 1 mm sieve in an amount of at least 60% of the total mass. The preparation of the material for the squeezing process has a significant effect on the energy consumption of the process. With a granulometric composition of particles of 1 mm, a moisture content of 15% and heating with a microwave power of 1000 W to 60° C, it provides a process that is 2 times less energy-intensive compared to pressing fat from an unprepared material.

Optimal Design for Rice Straw Briquetting Process Based on Experiments

2016 ◽  
Author(s):  
Yu Wang ◽  
Yu Sun ◽  
Kai Wu ◽  
Xianfei Xia
Keyword(s):  
Experimental Data ◽  
Energy Consumption ◽  
Moisture Content ◽  
Rice Straw ◽  
Lower Energy ◽  
Optimization Design ◽  
Specific Energy Consumption ◽  
Agricultural Crop ◽  
Technological Parameters ◽  
Test Platform

Ineffective utilization of agricultural crop straw is a big problem in agricultural developing countries. In this study, optimization design was carried out for the rice straw briquetting process based on experiments. A briquetting test platform designed by the authors was used to measure the specific energy consumption, extrusion pressure, as well as the density and compressive strength of the products made by rice straw under different technological parameters. These parameters included moisture content, temperature, pressure and pressing speed. Finally, optimal technological parameters were provided based on the experimental data. Results show that, lower energy consumption and better products quality are achieved when the moisture content is within 15% ∼ 20%, the temperature is within 110 °C ∼ 120 °C, the pressure is within 50 MPa ∼ 60 MPa and the pressing speed is within 40 mm/min ∼ 60 mm/min.

scholarly journals THE DESIGN PARAMETERS OF A BOOT NODE OF THE DISINTEGRATOR AT INSTALLATION OF PIPE RECYCLE MATERIAL

2019 ◽  
Vol 4 (5) ◽  
pp. 165-169
Author(s):  
И. Семикопенко ◽  
Igor' Semikopenko ◽  
В. Воронов ◽  
Vitaliy Voronov ◽  
Д. Смирнов ◽  
...  
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Granulometric Composition ◽  
Branch Pipe ◽  
Discharge Zone ◽  
Design Parameters ◽  
Radius Of Curvature ◽  
Technological Parameters ◽  
Analytical Expression

Currently, disintegrators are equipment used for grinding, mixing and activation of a number of materials. The possibility of obtaining a grinding product with a given granulometric composition is one of the advantages of disintegrators. An experimental unit with a recycling pipe is created to obtain a narrow granulometric composition of the grinding product. It provides unloading of the finished product and returning the grits for additional grinding to the chamber. The branch pipe of the recycle is a rubber-fabric pipe of circular cross-section with a radius of curvature, which ensures the movement of a two-phase medium from the discharge zone to the loading part of the disintegrator. When performing theoretical studies of the grinding process, it is necessary to coordinate the throughput of the loading unit and the node of the disintegrator recycle. In addition, the mass flow rate of the material through the feeder and the mass flow rate of the material (throughput) passing through the rows of percussion elements must be the same for the balanced operation of the disintegrator and the feeder. The mass flow capacity of the coarse material moving in the recycling pipe is determined based on the assumption of the linear nature of the change in bulk density when the material moves inside the recycling pipe. In result of theoretical researches, the analytical expression is received allowing to define a radius of a pipe of the modernized feeder proceeding from constructive and technological parameters of a disintegrator with a branch pipe of a recycle. A calculation scheme for determining the radius of the pipe of an improved disintegrator is presented. The analysis of obtained analytical expression allows to conclude that the radius of the pipe of the modernized unit is associated with the design and technological parameters of the disintegrator

Determination of grinding parameters of fenugreek seed

1970 ◽  
Vol 26 (1) ◽  
pp. 16 ◽  
Author(s):  
S Balasubramanian ◽  
Rajkumar Rajkumar ◽  
K K Singh
Keyword(s):  
Particle Size ◽  
Energy Consumption ◽  
Moisture Content ◽  
Specific Energy ◽  
Feed Rate ◽  
Average Particle Size ◽  
Specific Energy Consumption ◽  
Average Particle ◽  
Fenugreek Seeds ◽  
Fenugreek Seed

Experiment to identify ambient grinding conditions and energy consumed was conducted for fenugreek. Fenugreek seeds at three moisture content (5.1%, 11.5% and 17.3%, d.b.) were ground using a micro pulverizer hammer mill with different grinding screen openings (0.5, 1.0 and 1.5 mm) and feed rate (8, 16 and 24 kg h-1) at 3000 rpm. Physical properties of fenugreek seeds were also determined. Specific energy consumptions were found to decrease from 204.67 to 23.09 kJ kg-1 for increasing levels of feed rate and grinder screen openings. On the other hand specific energy consumption increased with increasing moisture content. The highest specific energy consumption was recorded for 17.3% moisture content and 8 kg h-1 feed rate with 0.5 mm screen opening. Average particle size decreased from 1.06 to 0.39 mm with increase of moisture content and grinder screen opening. It has been observed that the average particle size was minimum at 0.5 mm screen opening and 8 kg h-1 feed rate at lower moisture content. Bond’s work index and Kick’s constant were found to increase from 8.97 to 950.92 kWh kg-1 and 0.932 to 78.851 kWh kg-1 with the increase of moisture content, feed rate and grinder screen opening, respectively. Size reduction ratio and grinding effectiveness of fenugreek seed were found to decrease from 4.11 to 1.61 and 0.0118 to 0.0018 with the increase of moisture content, feed rate and grinder screen opening, respectively. The loose and compact bulk densities varied from 219.2 to 719.4 kg m-3 and 137.3 to 736.2 kg m-3, respectively.  

Технологические аспекты обезвоживания осадков промышленно-дождевых сточных вод автотранспортных предприятий

2019 ◽  
pp. 25-30
Author(s):  
G. Variushina
Keyword(s):  
Wastewater Treatment ◽  
Moisture Content ◽  
Vacuum Filter ◽  
Operational Parameters ◽  
Technological Parameters ◽  
Wastewater Treatment Process ◽  
Motor Transport ◽  
Cationic Flocculant ◽  
Residual Sludge ◽  
Treatment Facilities

Приводятся сведения об условиях формирования, объемах, химическом составе и свойствах осадков очистных сооружений производственных сточных вод автотранспортных предприятий. Даны примеры технологических решений по обезвоживанию образующихся в процессе очистки шламов. Рассмотрены технологические аспекты процесса интенсификации механического обезвоживания уплотненных осадков с использованием высокомолекулярных полиэлектролитов. Представлены данные лабораторных экспериментов по выбору типа флокулянта, его дозы, технологических параметров процесса, а также результаты определения влажности обезвоженных осадков, полученные на модели барабанного вакуум-фильтра. Приведены примеры эффективных обезвоживающих аппаратов отечественного производства и их технические характеристики, рекомендации и критерии их выбора, а также факторы, оказывающие влияние на эксплуатационные параметры обезвоживающего оборудования. Установлено, что наилучшая обезвоживающая способность барабанных вакуум-фильтров (остаточная влажность шламов от 66 до 83) может быть достигнута при применении катионного флокулянта ВПК-402 для осадков различных производственных цехов автотранспортного предприятия.Information on the conditions of generation, volumes, chemical composition and properties of sludge generated at the industrial wastewater treatment facilities of motor transport enterprises is provided. Examples of process engineering solutions for dewatering sludge generated during the wastewater treatment process are given. The technological aspects of enhancing mechanical dewatering of thickened sludge using high-molecular polyelectrolytes are considered. The data of laboratory experiments on choosing the type of flocculant, its dose, technological parameters of the process, as well as the results of determining the moisture content of dewatered sludge obtained in a model of a drum vacuum filter are presented. Examples of effective domestically produced dewatering apparatus and their technical characteristics, recommendations and criteria for their selection, as well as factors influencing the operational parameters of the dewatering equipment are given. It is found that the highest dewatering capacity of drum vacuum filters (residual sludge moisture content from 66 to 83) can be achieved by using VPK-402 cationic flocculant for processing sludge generated at the workshop premises of a motor transport enterprise.

The Simulation Experiments Research of Plow Bit Cutting Coal Rock Basing on Ls-Dyna

2011 ◽  
Vol 228-229 ◽  
pp. 1035-1038
Author(s):  
Zhi Yong Hao ◽  
Jun Mao
Keyword(s):  
Energy Consumption ◽  
Coal Seam ◽  
Separation Distance ◽  
Design Parameters ◽  
Cutting Depth ◽  
Element Analysis ◽  
Cutting Resistance ◽  
Cutting Energy ◽  
3D Simulation Model ◽  
Depth Separation

Using finite element analysis software ANSYS/ LS-DYNA, establishing the plow cutting coal seam 3D simulation model, simulating plow bit cutting coal seam dynamic process. under study, obtaining plow bit the cutting resistance, plow speed of time process curve, analyzing the influence on cutting energy consumption of the different cutting depth, separation distance and width, reaching the rule of cutting energy consumption changing with plow bits’ structure parameter and design parameters, in order to reduce the energy consumption and resistance, cutting depth and plow bits spacing ought to be selected by the real coal seam face conditions.

scholarly journals Simulations and Experiments of the Soil Temperature Distribution after 2.45-GHz Short-Time Term Microwave Treatment

Agriculture ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 933
Author(s):  
Xiaohe Sun ◽  
Changyuan Zhai ◽  
Shuo Yang ◽  
Haolin Ma ◽  
Chunjiang Zhao
Keyword(s):  
Soil Moisture ◽  
Field Strength ◽  
Moisture Content ◽  
Soil Temperature ◽  
Output Power ◽  
Soil Moisture Content ◽  
Microwave Treatment ◽  
Soil Treatment ◽  
Internal Temperature ◽  
Soil Disinfection

Microwave treatment is a green and pollution-free soil disinfection method. The application of microwaves to disinfect soil before cultivation is highly important to increase crop yields and protect the ecological environment. The electromagnetic field is an important parameter influencing the soil temperature field in the process of microwave soil treatment, and the change in soil temperature directly affects soil disinfection. Therefore, this article carried out research on the heating pattern in North China loess due to microwave treatment. First, COMSOL software was employed to simulate the microwave soil treatment process to analyze microwave penetration into soil. Second, with the application of microwaves at the designed frequency produced with a 2.45-GHz tunable microwave generating microdevice, soil with water contents of 0%, 10%, 20%, and 30% was treated for 10~60 s (at 10-s time intervals), and experiments on the influence of the microwave output power, treatment time, and soil moisture content on the soil temperature were performed via the controlled variable method. The simulation results indicate that with increasing soil moisture content, the microwave frequency inside the soil model increases, and the electric field intensity value decreases in the model at the same depth. After microwaves traverse through the 20-cm soil model, the incident field strength is three orders of magnitude lower than the outgoing field strength. The results of the microwave soil treatment experiment reveal that: (1) Compared to microwave output power levels of 1.8 and 1.6 kW, a level of 2 kW is more suitable for microwave soil disinfection. (2) After treatment, the highest temperature occurs on the soil surface, not within the soil. (3) The location of the highest soil internal temperature after microwave treatment increasingly approaches the soil surface with increasing soil moisture content, and the microwave output power does not affect the location of the highest soil internal temperature. Combining the electromagnetic field simulation and microwave soil treatment experiment results, it was found that the higher the field strength is, the higher the temperature value, and the highest soil internal temperature after microwave treatment often occurs at the first electromagnetic wave peak.

scholarly journals Mathematical Model of Pressure Formation Process along the Helix Channel Length of Screw Grinder

2020 ◽  
Author(s):  
Valery Pelenko ◽  
Ilkhom Usmanov ◽  
Vyacheslav Pokholchenko ◽  
Irina Smirnova
Keyword(s):  
Energy Consumption ◽  
Mathematical Description ◽  
Analytical Description ◽  
High Energy ◽  
Channel Length ◽  
Operating Conditions ◽  
Technical Equipment ◽  
Mining Equipment ◽  
Technological Parameters ◽  
Total Energy Consumption

The improvement of the technical equipment effectiveness is currently becoming particularly important. This applies not only to large and high-energy-intensive machines, but also to household appliances, the total energy consumption of which often exceeds the energy consumption of the overall equipment. These types of devices include, in particular, grinding and cutting equipment. The mathematical description of the processes carried out on this equipment is generalized and can be extended to a wider class of machines, including waste processing and mining equipment. The technological parameters, the design of screw grinders, and the processes of movement, deformation, extrusion and cutting carried out in them are characterized by a significant number of factors affecting the energy intensity. The main ones are the geometric parameters of the screw, machine’s body, cross knife, grinding plate’s thickness, the number and diameter of holes in it, as well as the product’s physical-mechanical characteristics and operating conditions. The most important for the mathematical description are the zones and processes where the main share of the consumed power is spent. The complexity of their analytical description is due to a simplified consideration of either individual technological zones of grinders’ existing designs, or the use of unreasonable simplifications.

scholarly journals RESEARCH OF THE PROCESS OF EXTRACTION OF BLACK CUMIN OIL WITH PRELIMINARY HEAT TREATMENT

2021 ◽  
pp. 66-69
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Acid Number ◽  
Oil Yield ◽  
Preliminary Heat Treatment ◽  
Heat Treatment Process ◽  
Drying Process ◽  
Technological Parameters ◽  
Variable Parameters ◽  
Black Cumin

The aim of the study is to increase the yield of oil from black cumin seeds. The results of studies of the influence of technological parameters - temperature and duration of drying of black cumin seeds on indicators of the yield of oil, cake and moisture removal from seeds are presented. The optimal technological parameters of the influence of the preliminary heat treatment process on the indicators of the maximum oil yield, acid number, color, and oil moisture have been established. The variable parameters were the temperature from 80 to 130 °C and the duration of the heat treatment process from 5 to 60 minutes. The possibility of increasing the oil yield by 6,11% has been shown. For this, the drying process must be carried out at a temperature of 100 °C and a process duration of 15 minutes. At the same time, the degree of oil extraction increases from 59,13% to 75,24%, the acid number decreases to 2,98, humidity to 0,12%, and color to 40.

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