SU85084A1 - Cyclone pulverized firebox - Google Patents

Description

The subject of the invention is a cyclone pulverized furnace with a rotationally rotating movement of a burning air-air mixture and supplying secondary air to the combustion chamber through tangential channels.

A distinctive feature of the invention is that to enhance the vortex gas flow, increase the slagging ability and supply additional secondary air, a hollow cylinder is concentrically installed in the furnace, the walls of which are provided with tangential channels for supplying air to the furnace. For removal of molten slag in the lower part of the chamber, it is arranged underneath with tap holes, and for removal of the products of combustion above the hearth a window is provided covered with a grid of screen tubes.

FIG. 1 is a cross-sectional view of a hollow cylinder for supplying additional secondary air; FIG. 2 is the same in terms of FIG. 3 a furnace with an axial turbulent pulverized coal burner; and FIG. 4 is the same in terms of.

The cyclone pulverized furnace is a vertical cylindrical chamber 1 (Fig. 1). The chamber is shielded by tubes with welded spikes, covered with a coating.

Tangentially to the periphery of the cyclone chamber, at some height, there are slit mountains 5 (Fig. 2) through which pulverized coal or dust-air mixture is supplied.

The combustion products are removed from the cyclone chamber into the cooling and afterburning chamber 4 (Figures 1, 3 and 4), which has a funnel to remove the ash.

The removal of the gas flow from the cyclone chamber 1 into the cooling chamber and the burning out 4 takes place through an opening 7, which is shielded by pipes 13. These pipes, arranged in several rows, increase the slag-trapping ability of a single-stage cyclone furnace.

No. 85084- 2 To enhance the vortex-like rotation of the gas flow, increase the slag-trapping ability and supply x Extra secondary air inside the chamber / concentrically mounted shielded to the coated side. cylinder 2 (fng. 1), the walls of the cylinder are provided with channels 8 (Fig. 2), which are located tangentially along its periphery and are intended to supply secondary air to the furnace.

The upper part of cylinder 2 is connected to the air-supplying highway, and the LOWER one is tightly attached to the bottom of the chamber. In order to remove the liquid slag in the lower part of the chamber, hot under 5 is installed. In the center of which there is a tap 6 (Fig. 3) in the form of a nozzle. Under the firebox, you can also have two tap holes, one of which is located in the center, and the other - near the wall of the firebox. If there are two notches in the hearth and when closing the hole

7, in the grid of pipes 13, the products of combustion can be removed from the cyclone chamber through an axial entrance notch (5, and a notch 10 located closer to the wall of the cylinder is used to discharge molten slag.

Work pulverized furnace is as follows.

Through the slit burners 3 (FIG. 2), the dust-air mixture enters the cyclonic chamber /, which in the inner part of the chamber makes a turbulent motion. At the same time, additional secondary air is supplied through the cylinder 2 (Fig. 1), which exits the tangential channels 8 outside the ignition zone of the dust-air mixture. In the thinnant, there is a "hawkish" movement of the dusty airflow, which ignites. When coal dust burns out under the action of the centrifugal effect, maximum ash collection occurs in the molten form within the furnace with dust burning and a film of molten slag. The molten slag flowing onto the hot under 5 is discharged through a tap-hole 5, and the combustion products are sent from the furnace through the opening 7 to the cooling chamber and burning down 4.

Dusty air and secondary air can be fed into the firebox in two ways:

1. A dusting mixture is fed into the cyclone chamber through slot burners 3 of high capacity. Simultaneously, secondary air is supplied through the slots in the chamber. The main amount of air enters from cylinder 2 through tangential channels 8 (Fig. 1 and 2).

2. The air-dried s. Mixture is fed into the cyclone chamber through an axial turbulent lean-burner 12 of high capacity.

In this case, a pulverized coal burner directs all the dust-air mixture entering it to the periphery of the cylindrical chamber. On the periphery of the cyclone chamber, secondary air is supplied through partitioned channels //, located tangentially (Figs. 3 and 4).

One or several cyclone chambers are connected to one cooling and burnout chamber.

Subject invention

Claims (3)

I. Cyclone pulverized furnace with a rotationally spiraling movement of a burning dust-air mixture and supplying secondary air through tangential channels located along the cylinder-forming furnace, characterized in that, in order to enhance the vortex rotation of the gas stream, increase slag-trapping ability and supply the secondary heat source it employs a hollow cylinder located axially inside the furnace with tangential channels in its walls to direct air into the furnace. 2. A cyclone pulverized furnace according to claim 1, characterized in that it is provided with a hole covered with a screen tube network and located in the lower part of the furnace to dispose of the Combustion Products. 3. The form of the firebox according to claims. 1 and 2, characterized in that, in order to remove molten slag, in the lower part of the cyclone chamber is installed under the axial notch in the form of a nozzle and With the notch, near the wall of the cylinder.