Thermal Energy Consumption in the Heat-Technology Production of Solid Composite Fuel From Low-Grade Raw Materials

Roman Tabakaev,Alexander Zavorin,Alexander Kazakov,Alexander Astafev,G.V Kuznetsov,A.O Zhdanova,E.E Bulba,P.A Strizhak

doi:10.1051/epjconf/201611001057

Abstract

An evaluation is made of the thermal energy consumed in the heat-technology production of solid composite fuel from low-grade organic raw materials. It is shown that the heat of decomposition of the organic mass and the combustion of the by-products of heat-technology may be sufficient to cover all the energy needs for processing peat, brown coal and wood chips. Producing solid composite fuel from sapropel requires external resources to compensate for part of the heat consumed. Calculations show that it is possible for the thermal processing of raw materials to proceed autothermally due to the heat of decomposition when the moisture content at the reactor inlet is limited: for peat it should be no more than 35%, 54% for brown coal, and 37% for wood chips. The low heat of decomposition of the sapropel organic mass means that its thermal processing cannot proceed autothermally.

Highlights

IntroductionThe gradual depletion of high-quality energy resources such as natural gas and coal, as well as the need to use them in the chemical industry and metallurgy, has made it necessary to take a new look at the future of the energy industry
Calculations show that it is possible for the thermal processing of raw materials to proceed autothermally due to the heat of decomposition when the moisture content at the reactor inlet is limited: for peat it should be no more than 35%, 54% for brown coal, and 37% for wood chips
The gradual depletion of high-quality energy resources such as natural gas and coal, as well as the need to use them in the chemical industry and metallurgy, has made it necessary to take a new look at the future of the energy industry

Summary

Introduction

The gradual depletion of high-quality energy resources such as natural gas and coal, as well as the need to use them in the chemical industry and metallurgy, has made it necessary to take a new look at the future of the energy industry. As a model for the evolution of the energy industry, the Russian Federation has developed a program called “Russia's Strategy for Energy Development up to 2030”, which was approved by the government and envisages a gradual decrease in natural gas and replacing that energy with renewable resources, low-grade organic raw materials (LR), such as peat, biomass, low-grade brown coal, sapropel, etc. It has been noted that it would be advantageous to use LR in areas with a decentralized energy supply that receive energy from stand-alone power plants running on fuel that has been brought in. Most of this fuel is supplied by commercial organizations of the secondary market after resale, which, along with the annual increase in transportation fees, raises its costs.

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