SU1613805A1 - Method of preparing solid fuel to combustion - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to a power system and makes it possible to increase efficiency. For this, the fuel is divided into streams with high and low ash content, and before being fed to the combustion, the flow with low ash content is subjected to grinding. 1 hp f-ly, 2 ill.

Description

The invention relates to a power system and can be used on thermal power plants operating on solid fuel with refractory ash, clogged during extraction and transportation with rock impurities with ash having a chemical composition opposite to that of the initial fuel.

The purpose of the invention is to increase the economics by reducing the energy for grinding and ensuring a stable slag yield when burning fuel with a refractory ash.

FIG. 1 shows a boiler plant for implementing this method (option 1); in fig. 2 - boiler installation (option 2).

The boiler plant contains a bunker 1 for fuel with high ash content and a tank 2 for fuel with low ash content, connected respectively to the burner 3 of the upper floor of the smelting chamber 4 of combustion and to the mill 5 of fine grinding. Mill 5 is connected by dust pipe 6 to the burner 7 of the lower rus of the smelting chamber 4 combustion.

In option 2 (FIG. 2), the boiler plant further comprises a coarse grinding mill 8, through which the hopper 1

connected to the burner 3. Mill 8 is connected to the burner 3 dust pipe 9

The method of preparing solid fuels for combustion is carried out as follows.

Open-pit fuel entering the thermal power plant - COAL is divided into streams with high and low ash content. At the same time, the component with high ash content contains rock impurities with acid sols, for example, containing less than 209 main components (CaO), and the low ash content fuel stream contains organic matter from fuels with basic refractory ash, for example, OT P ° T, components (Cao). In the bunker I load fuel with high ash, and in the bunker 2 - with low ash. From the hopper 2, the fuel enters the mill 5, where v, nJ M ° - P comes to be dried. From mill 5, fuel with reduced ash content in the form of an air mixture enters through the dust pipe 6 into the melting chamber of the combustion chamber 4 through the burner 7. From bunker I, the fuel with high ash content enters the melting chamber 4 of the combustion through burner 3. Stability and early

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Г Г Г overshoes 3 due to illumination, below the located flow of fuel with a low sol – 1 ™ S as a result of the loss of heat. ü „„ „wet with ash souring of particles HUH f -« - i.

Eu: ng potg-g

 while ensuring the condition of their separation into fluxed slag.

Claims (2)

Invention Formula 1 A method of preparing solid fuel-, wunKHM slagTaSnu poroTyT impurities T with acidic ash remaining from the combustion products leaving the melting chamber 4, combustion products. The slag fluxing from combustion occurs, ".". fuel current with reduced ash content and combustion in a furnace with liquid slaglag melting ash of basic composition. Oflu-10 split fuel " poured low-melting slag, containing a stream with reduced and increased From 20% to 45% of the main component of the "" ° ° "" supplying them to the furnace, they pre-flow from the melting chamber 4C by grinding one of the options from the solid gas generator, - "/" - GkGomichgti pTem reduction of fuel for incineration is carried out -, comminution and assurance of the first, and characterized by the fact that the top-D. , at the slag removal, when burning fuel from the bunker 1 before feeding into the plaitoichi oloy, the preliminary combustion chamber 4 enters the mill: coarse grinding of the fuel HHuv 8 is subjected to coarse grinding. In a mill about piponically reduced ash content, the current of fuel with increased ash content from –20 "" g according to claim 1, or uuuc, will be reduced to the particle size determined by 2. bp increased due to the condition of their separation from the flue “door” to coarse grinding, gases in the smelting chamber 4 of the combustion, grinding particles HUH f - “- i. Eu: ng potg-g  while ensuring the condition of their separation into fluxed slag. Invention Formula 1 The method of preparing solid fuel-, wunKHM went, ".“.  burning in a firebox with a liquid went FI.1 t, i C4J CXI Oj