This article touches upon the preliminary results of determining the coefficient of relative abrasiveness of various bulk materials. An experimental setup for determining the abrasiveness of various bulk materials is described, which makes it possible to set the abrasiveness of a material with different physical properties and fractions of the frayed material.It is noted that during experiments it is necessary to ensure the stability of fractions. It is scheduled to determine the critical speed of movement of bulk solids, which eliminates the change in fraction size through grinding when the test material is abraded by samples. It is emphasized that the abrasiveness of the test material is determined on the material recognized as a reference.
The theoretical and practical introduction of this kind of firing boiler units in coal thermal power plants is considered in the article. The results of an experimental study of three types of coals are presented in order to obtain the required gaseous fuel. The aim of the study is to develop a new, economically and ecologically more acceptable method for firing boilers at thermal power plants, which is able to exclude the use of expensive and inconvenient fuel oil. The tasks of the experiment are to develop a technological scheme of kindling of boilers at thermal power plants, using as a type of ignition fuel volatile combustible substances released during the heating of coal, and to investigate three types of coal for the suitability of obtaining gaseous fuels, in sufficient volume and with the required heat of combustion. The research methods include the analysis of technical and scientific-methodological literature on the problem of the present study, the study of the experience of scientists of other countries, the full-scale experiment on the production of volatile combustible substances. During the full-scale experiment, the coal of 3 fields of Kazakhstan has been studied: Shubarkul, Maikuben and Saryadyr. The analysis has been performed and the choice of the most convenient technology for boiler kindling and maintenance of steady burning of the torch has been made according to the proposed method, as well as the corresponding technological scheme has been developed. As a result of the experiment, it can be stated that from coal in the process of its heating (without access to oxygen), it is possible to obtain a sufficient amount of combustible volatile substances. The released gaseous fuel has the necessary parameters and is quite capable of replacing an expensive fuel oil. The resulting gaseous fuel is quite convenient to use and environmentally cleaner. The piloting scheme developed as a result of the experiment can be introduced in pulverized-coal thermal power plants, as a result of which they become single-fuel.
The article substantiates the necessity and possibility of preserving coal in the power industry as a fuel of the future, using the appropriate technology, based, to a large extent, on the use of layered combustion technology. The advantages and disadvantages of coal combustion in a layer are analyzed. The need to switch to flaring coal combustion to increase the unit capacity of the boiler is noted. The universality of this method of coal combustion in relation to its thermal properties is indicated. The sources of problems with emissions into the atmosphere during coal flaring are given. Shown is the substitution of the concept of "dirty technology" with the concept of "dirty fuel" in relation to coal fuel. The ways of returning to the layered combustion of coal are indicated, with the provision of the required capacity of the power facility through the installation of an increased number of boilers with lower productivity. It is noted that at the Almaty University of Energy and Communications named after Gumakrbek Daukeev, a coal combustion technology with reduced disadvantages is being developed The possibility of using flammable volatiles contained in coal for kindling a boiler and for stabilizing the ignition of a coal flame is noted. the possibility of supplying residents of a remote village with their own gaseous fuel for cooking was considered. The possibility of using this gaseous substance for the generation of electrical energy with the installation of low-power gas turbine units on a boiler with coal layer combustion is indicated. Based on such a comprehensive analysis of the advantages and disadvantages of coal, a conclusion was made about the long-term preservation of coal in the power industry.
The article considers the option of increasing the representativeness of tariffs, through the allocation of a part related to ensuring the readiness of an object for operation and a part due to the cost of producing the required volume of products (services), It is also shown that the use of the reduced value of losses per unit (of surface or per unit of length) is more consistent with the process of product losses during delivery to the Consumer. A variant of determining the cost of heat and electrical energy in their joint production (cogeneration), which improves their reliability, is considered.
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