Optimizing the energy efficiency of the chemical and energy engineering process of drying of a moving dense multilayer mass of phosphorite pellets

Мешалкин, В. П.; Бобков, В. И.; Дли, М. И.; Ходченко, С. М.

doi:10.1134/s0012500817120059

Cited by 17 publications

(7 citation statements)

References 3 publications

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“…The works of Russian scientists have also made a significant contribution to solving the issues of increasing the energy efficiency of industrial enterprises. The influence of structural changes in industry on energy efficient development has been investigated (Malysheva et al, 2016;Razumovskaya et al, 2018), the dependence of energy consumption costs on external factors is formalized (Mokhov and Demyanenko, 2019); energy efficiency optimization models are built (Meshalkin et al, 2017;Dovì and Meshalkin, 2017); the trends and prospects of reducing the specific energy consumption of enterprises and industrial clusters have been identified (Dyrdonova and Lin'kova, 2019).…”

Section: Literature Reviewmentioning

confidence: 99%

Optimization of Energy-Efficient Functioning of the Oil and Gas Sector of the Economy Through Digitalization and Resource Conservation

Shinkevich¹,

Kostyukhin²,

Savon³

et al. 2021

IJEEP

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Section: Literature Reviewmentioning

confidence: 99%

Optimization of Energy-Efficient Functioning of the Oil and Gas Sector of the Economy Through Digitalization and Resource Conservation

Shinkevich¹,

Kostyukhin²,

Savon³

et al. 2021

IJEEP

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“…The main reason for the violation of the roasting condition for the pelletized material is a change in the raw pellets properties: humidity, strength, granulometric compositon [6,7]. If the pellets with high humidity are fed for roasting with a steady roasting condition this leads to excessive heat and incomplete removal of moisture in the drying zone [8,9].…”

Section: Technogen-2019mentioning

confidence: 99%

“…The authors developed and presented in [5][6][7] the multiscale mathematical and computer models and algorithms for the optimal control of the chemical and power engineering system (CPES) of the phosphorite pellets production and multilevel optimization DOI 10.18502/kms.v6i1.8098…”

Section: Kne Materials Sciencementioning

confidence: 99%

Power and Resourse Efficient Envoronmentally Safe Technology for Processing Dumps of Technogenic Waste From Ore-Dressing and Processing Enterprises

Мешалкин

Бобков

2020

Kms

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This research proposes a systematic approach for the analysis of volumes, physicochemical, granulometric, lithologic and thermal characteristics of waste from ore-dressing and processing enterprises stored in the dumps (tailing dumps) of ore-dressing and processing plants to assess the economic potential of its use in the system of complex power and resource efficient environmentally safe processing including palletizing machines, conveyor indurating machines and ore–thermal furnaces. The obtained results allow the authors to formulate the basic engineering, technological, economic and environmental requirements for complex chemical and power engineering systems of processing technogenic waste from ore-dressing and processing plants, these results make it also possible to define the degree of variability for the characteristics of the waste lots from various dumps. The paper describes the developed intensional and mathematical formulations for the multiscale problem of optimizing chemical and power engineering processes of technogenic raw materials processing in a complex chemical and power engineering system as a problem for discrete dynamic programming. The distinctive feature of this problem is to take into account the spatio-temporal multistage processing in a moving multilayer mass of pelletized raw material, the intensity of the process of internal moisture transfer and the variables for the control flow of the heat carrier gas. It allows increasing power efficiency by intensifying heat and mass transfer processes of multilayer drying, calcination and sintering. The criterion of the efficiency is the minimum cost of electric and thermal energy spent on processing. The obtained results were used to calculate power efficient environmentally safe processing of technogenic waste from ore-dressing and processing enterprises dumps. It was defined that heat and mass transfer processes are intensified, power consumption is reduced and the quality of the finished product is increased in the conditions of optimal power and resource efficient operation for the processing system. Keywords: tecnhogenic waste, waste processing, ore-dressing and processing plant, power and resource efficiency, optimization, system analysis, environmentally safety

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“…Expression (14) can be determined by discretizing the   , τ y domain into   , τ ij y  intervals and solving, for each space-time interval, the heat equation for each separate pellet using an implicit finite-difference scheme obtained by splitting the radius R into N intervals Δxn, n = 1, ..., N, as shown in Figure 4. i j can be determined from the solution of the entire system of partial differential equations (PDE) using the drying process computer simulation developed by the authors [20]. The solution of the dynamic programming problem begins with the last stage.…”

Section:  mentioning

confidence: 99%

“…The set of equations makes it possible to determine the temperature values of the pellets Tm(x, y, τ) = Tm i j,n , and consequently of the temperature gradient (∂Tm/∂x) i j,n and heating rate (∂Tm/∂τ) i j,n , the temperature of the heat-carrier gas at the exit of the vertical multilayer laying of pellets Tg i J , the moisture content U i j , moisture transfer intensity I i j and the relative degree of drying ψ i j can be determined from the solution of the entire system of partial differential equations (PDE) using the drying process computer simulation developed by the authors [20]. The solution of the dynamic programming problem begins with the last stage.…”

Section:  mentioning

confidence: 99%

Optimization of Energy and Resource Efficiency in a Multistage Drying Process of Phosphate Pellets

Мешалкин

Бобков²,

Дли³

et al. 2019

Energies

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The roasting of phosphate pellets is an energy-intensive process the optimization of which can give rise to considerable efficiency improvements. To this purpose, the mathematical modeling and the computer-aided simulation of a multi-stage process of phosphate pellets roasting have been developed. This process includes drying, dissociation reaction of carbonates and a sintering process in a moving, dense, multilayer mass of phosphate pellets in a special horizontal grate apparatus. A theoretical model for the physical-chemical processes of a mass of phosphate pellets moving in a multistage process and subject to external operation variables (i.e., temperatures and flowrates of the drying gas at different positions of the conveyor length) has been developed. By letting these control variables vary over suitable ranges limited by technical constraints, it is possible to construct an algorithm that minimizes the overall energy consumption subject to the attainment of the required quality indicators of the pellets. Therefore, the set of constraints includes bounds on both the operational variables and quality indicators of the final product. A dynamic programming algorithm subject to suitable penalty functions for avoiding constraints violation has been used. The results obtained show that the scientifically based operation described in this paper achieves the goal of attaining considerable energy savings while assuring the quality of the finished pellets. Furthermore, the results highlight the convenience of extending the general strategy developed in this article to other chemical energy engineering processes.

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Optimizing the energy efficiency of the chemical and energy engineering process of drying of a moving dense multilayer mass of phosphorite pellets

Cited by 17 publications

References 3 publications

Optimization of Energy-Efficient Functioning of the Oil and Gas Sector of the Economy Through Digitalization and Resource Conservation

Optimization of Energy-Efficient Functioning of the Oil and Gas Sector of the Economy Through Digitalization and Resource Conservation

Power and Resourse Efficient Envoronmentally Safe Technology for Processing Dumps of Technogenic Waste From Ore-Dressing and Processing Enterprises

Optimization of Energy and Resource Efficiency in a Multistage Drying Process of Phosphate Pellets

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