SU11837A1 - Coal Burner - Google Patents

Description

The invention relates to furnaces for coal dust intended for high pressure boilers, in which steam is produced due to the heat of steam taken from the steam space of the boiler and overheated before entering the water space of the same boiler. In the firing space of the proposed furnace, there is a superheater composed of a series of F-shaped tubes, the vertical branches of which form flat walls and knees are located at heights in order to form passages for combustion products to adjacent chimneys.

In FIG. 1 shows a vertical section of a boiler equipped with the proposed furnace; FIG. 2-section of the wall formed by the vertical branches of the superheater tubes.

In the furnace space 1, the tubes of the superheater are placed, attached in the upper part to the collectors 3, 4 and arranged in such a way that their vertical branches by themselves or with the matching bands 5 (Fig. 2), ILI and

with refractory bricks, it forms a solid wall covering the combustion space to a depth marked with letters aa. At the same time, the knees of the 15 tubes are located at different heights, thus allowing the flow of flue gases free passage to adjacent chimneys. In the second chimney, tubular coils 6 and 7 connected in parallel are located, of which the coil 6 located below is an additional superheater, and the coil 7 located next to it is used to heat the feed water.

Steam comes from boiler 8 and pump 9 is supplied to co-collector 3, and then to V-shaped tubes of the superheater. The latter may be included in parallel, and the bundles of such tubes are in series with each other along the furnace space. Upon passage of the collector, 4 and 10 steam enters an additional superheater 6, and then into the collector 11. From there, part of the steam is discharged through line D to operate in a steam engine, and the rest of the steam enters the drum 8 to form steam from the water contained in it.

The feed water coming in - through the pipeline &, is heated in the preheating oil 7, consisting of parallel-connected pipes and sent to the drum 8. Part of the preheater 7 may also be located in the third chimney. In the general case, it is advisable to place in the third chimney only an air heater 12, into which air enters the pipeline 4. From the air heater, the irradiated air-production required for combustion through the collector 14 into the nozzle-13 for coal dust. The flue gases come from the third chimney to the bora and then to the chimney.

Pr. Submet-patent Combustion for coal dust, designed for high-pressure boilers, in which steam production occurs due to the introduction of steam into the water space of the boiler, taken from the steam space of the same boiler and overheated along the way, characterized with use in fire area 1 The furnaces (Fig. 1) of a superheater composed of a row of V-shaped tubes, the vertical branch of which 2 form solid walls (Fig. 2), and the elbows 15 are located at different heights, in order to form for the products of burning neighboring chimney.

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