SU1567605A1 - Unit for heat reprocessing offinely ground material - Google Patents

Abstract

This invention relates to the gasification of solid fuels and improves productivity. The installation contains a vertical two-section cyclone chamber (CC) 1 having the shape of two cylinders interconnected by side surfaces, a melt collector / CP / 9 connected to the CC by pinch 8, estrus (T) 2 for introducing material installed so that its geometrical axis is located at the junction of the CK cylinders. T is provided with a preheater 3 and a nozzle 13 for supplying a reducing gas. The oxidizer supply nozzles (CO) are located perpendicular to the T axis and relative to them on both sides at an angle of 60 ° to the vertical plane passing through the T axis and dividing the chamber into two identical sections, nozzles are installed to supply the fuel with the oxidant mixture. The CP is divided by a water seal 11, forming an additional afterburning chamber 12, in which there are openings connected to the oxidizer supply collector. 1 hp f-ly, 2 ill.

Description

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60 ° to the vertical plane passing through the axis T and dividing the chamber into two identical sections, nozzles are installed to supply the mixture of fuel and oxidizer. The CP is divided by a hydroprotection partition 11, forming an additional afterburning chamber 12, in which there are openings connected to the oxidizer supply manifold. 1 hp f-ly, 2 ill.

The invention relates to devices for the thermal processing of finely divided raw materials and can be used for the gasification of solid fuels, mainly coal.

The purpose of the invention is to increase the performance of the installation.

FIG. 1 shows the installation section; in fig. 2 shows a section A-A in FIG.

The device works as follows.

In multisection cyclone chamber 1 through the chute 2 enters a swirling gas stream containing finely ground coal. The flow of gas and coal is swirled in the swirler 3, where it also carries out the gas and coal by electric current up to the ignition temperature, which varies between 00-600 ° C for different types of coal.

The oxidizer heated in heater A, air or air enriched with oxygen above 21%, enters the cyclone chamber 1 through tangentially mounted nozzles 5. Natural gas and oxidant mixture flows through nozzle 6, the specific consumption of which is 0.95-1.05 from stoichiometric. During the combustion of gas in the intersectional space between the double nozzle 7 and the chute 2, a stable flare core is formed, and the particles of coal that fall into this nucleus instantly flare. Due to the tangential installation of nozzles 5 and 7, two swirling high-turbulent vortices form in the cyclone chamber, and particles of coal that fall into these vortices undergo gasification, since the total oxidizer consumption coefficient is much less than unity and maintained at a level that ensures the gas temperature at 150 -200 C above the ash melting point. At this temperature, the ash melt is in a fluid state, which prevents its solidification and the formation of

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these zones in all elements of the installation.

The coal gasification produces a large amount of carbon monoxide, a reducing gas,

In the cyclone chamber, the inorganic part of the coal (ash) is melted and, due to the centrifugal forces created by the vortexes, is thrown onto the walls of the cyclone chamber, where a crust is formed. Coal particles are also thrown onto the chamber walls. Thus, the gasification process, which began in the volume of the cyclone chamber, continues on its walls in the flowing ash and coal melt. From the cyclone chamber, swirling gas vortices with suspended ash particles and coal in them, together with the melt, enter the restriction device. where intensive mixing of gas, suspended particles and melt occurs due to a significant (in times) increase in the average velocity of the gas stream. At the exit from the clamp, the melt and solid particles are sprayed, that is. Pinch works as a centrifugal mechanical nozzle. Here is the final phase of coal gasification.

In the melt cr-ed1 collector, the gas flow rate is cut off, and the melt particles are precipitated from the reducing gas stream, which is then sent to the shaft 10, and the melt containing a small amount of carbon flows through the hydrolock 11 into the chamber 12 afterburning, where the afterburning of carbon remaining in the melt occurs, by bubbling the heated oxidant through the melt layer. In the afterburner, the consumption rate of the oxidizer is greater than one. The gaseous gases formed in the afterburning chamber are used in the preheater to heat the oxidizer to 00-500 ES.

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A portion of the reducing gas is directed through the nozzle 13 into the chute for sawing finely divided coal.

Claims (2)

Invention Formula 1 "Thermal processing facility for finely ground material, mainly solid fuel, comprising a vertical two-section chamber having the form of two cylinders interconnected by side surfaces, a melt collector connected to the chamber with a pinch, a chute for insertion of material installed in the upper part of the chamber to supply a mixture of fuel and oxidizer, tl i5676056 In order to increase productivity, it is installed at the junction of the cylinders and the nozzles for feeding the fuel / oxidizer mixture are located on both sides of a vertical plane passing through the axis of the chute and dividing the chamber into two identical sections, and installed at an angle of 60 ° to the specified plane. 2. Installation according to Claim 1, characterized in that it is provided with nozzles for supplying an oxidizing agent located perpendicular to the axis of the chute at the junction of the chamber sections. Aa Heated oxidizing agent FIG. 2 Natural gas I