Improving energy efficiency of cyclone circuits in coal beneficiation plants by pump-storage systems

Lijun Zhang, Xiaohua Xia, Jiangfeng Jeff Zhang

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A pump storage system (PSS) is introduced to the coal preparation dense medium cyclone (DMC) plants to improve their energy efficiency while maintaining the required medium supply. The DMC processes are very energy intensive and inefficient because the medium supply pumps are constantly over-pumping. The PSS presented is to reduce energy consumption and cost by introducing an addition medium circulation loop. The corresponding pump operation optimization problem in the PSS scheme under time-based electricity tariff is formulated and solved, based on which the financial benefits of the design is investigated using life cycle cost analysis. A case study based on the operation status of a South African coal mine is carried out to verify the effectiveness of the proposed approach. It is demonstrated that the energy cost can be reduced by more than 50% in the studied case by introducing a 160 m3 storage tank. According to life cycle analysis, the PSS Option 1 yields an annual 38% reduction of the overall cost for the beneficiation plant with a payback period of 2.68 years.
LanguageEnglish
Pages306-316
Number of pages11
JournalApplied Energy
Volume119
DOIs
Publication statusPublished - 15 Apr 2014

Fingerprint

Beneficiation
energy efficiency
cyclone
Energy efficiency
pump
Coal
Pumps
coal
Networks (circuits)
Costs
Life cycle
cost
life cycle analysis
Coal preparation
cost analysis
storage tank
Coal mines
coal mine
energy
pumping

Keywords

  • coal beneficiation
  • pump-storage system
  • operation optimization
  • energy efficiency
  • life cycle cost analysis

Cite this

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title = "Improving energy efficiency of cyclone circuits in coal beneficiation plants by pump-storage systems",
abstract = "A pump storage system (PSS) is introduced to the coal preparation dense medium cyclone (DMC) plants to improve their energy efficiency while maintaining the required medium supply. The DMC processes are very energy intensive and inefficient because the medium supply pumps are constantly over-pumping. The PSS presented is to reduce energy consumption and cost by introducing an addition medium circulation loop. The corresponding pump operation optimization problem in the PSS scheme under time-based electricity tariff is formulated and solved, based on which the financial benefits of the design is investigated using life cycle cost analysis. A case study based on the operation status of a South African coal mine is carried out to verify the effectiveness of the proposed approach. It is demonstrated that the energy cost can be reduced by more than 50{\%} in the studied case by introducing a 160 m3 storage tank. According to life cycle analysis, the PSS Option 1 yields an annual 38{\%} reduction of the overall cost for the beneficiation plant with a payback period of 2.68 years.",
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Improving energy efficiency of cyclone circuits in coal beneficiation plants by pump-storage systems. / Zhang, Lijun; Xia, Xiaohua; Zhang, Jiangfeng Jeff.

In: Applied Energy, Vol. 119, 15.04.2014, p. 306-316.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Improving energy efficiency of cyclone circuits in coal beneficiation plants by pump-storage systems

AU - Zhang, Lijun

AU - Xia, Xiaohua

AU - Zhang, Jiangfeng Jeff

PY - 2014/4/15

Y1 - 2014/4/15

N2 - A pump storage system (PSS) is introduced to the coal preparation dense medium cyclone (DMC) plants to improve their energy efficiency while maintaining the required medium supply. The DMC processes are very energy intensive and inefficient because the medium supply pumps are constantly over-pumping. The PSS presented is to reduce energy consumption and cost by introducing an addition medium circulation loop. The corresponding pump operation optimization problem in the PSS scheme under time-based electricity tariff is formulated and solved, based on which the financial benefits of the design is investigated using life cycle cost analysis. A case study based on the operation status of a South African coal mine is carried out to verify the effectiveness of the proposed approach. It is demonstrated that the energy cost can be reduced by more than 50% in the studied case by introducing a 160 m3 storage tank. According to life cycle analysis, the PSS Option 1 yields an annual 38% reduction of the overall cost for the beneficiation plant with a payback period of 2.68 years.

AB - A pump storage system (PSS) is introduced to the coal preparation dense medium cyclone (DMC) plants to improve their energy efficiency while maintaining the required medium supply. The DMC processes are very energy intensive and inefficient because the medium supply pumps are constantly over-pumping. The PSS presented is to reduce energy consumption and cost by introducing an addition medium circulation loop. The corresponding pump operation optimization problem in the PSS scheme under time-based electricity tariff is formulated and solved, based on which the financial benefits of the design is investigated using life cycle cost analysis. A case study based on the operation status of a South African coal mine is carried out to verify the effectiveness of the proposed approach. It is demonstrated that the energy cost can be reduced by more than 50% in the studied case by introducing a 160 m3 storage tank. According to life cycle analysis, the PSS Option 1 yields an annual 38% reduction of the overall cost for the beneficiation plant with a payback period of 2.68 years.

KW - coal beneficiation

KW - pump-storage system

KW - operation optimization

KW - energy efficiency

KW - life cycle cost analysis

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SN - 0306-2619

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