SU1209720A1 - Device for controlling flow of dust-like materials in blast furnace tuyeres - Google Patents

Description

This invention relates to ferrous metallurgy, in particular to smelting iron using pulverized fuel.

The aim of the invention is to improve the accuracy of monitoring and controlling the consumption of a coal pipe.

Figure 1 presents a diagram of the device j in figure 2 - node I in figure 1; lengthwise cut; on fig.Z - the same, cross section

The device (Fig. 1) contains a supply tank 1, an aerofowder 2. (their number corresponds to the number of tuyeres) air pipe 3. To transport dust, transport dust pipe 4 to the tuyere, air flow meter 5 including a chamber diaphragm, - flow meter 6 . of charts on a pipe piping and including a segment - iiyio diaphragm, concentrate ohm} 7 dusty air mixture, multiplication unit 8, air flow regulator 9, flow meter 10 coal dust and control valve 11. A feature of the segment diaphragm 12 flow meter 6- allows The main thing that makes it possible to use the flow of air mixtures is the presence of a partition (segment) located in the upper part of the cross section of the dust pipe 4 (Figures 2 and 3) of transportation of the pulverized coal mixture to the tuyeres of the blast furnace.

The device works in the following way.

Pshevidny material from pitakzhi her capacity 1 enters the aeropicat (Gl

2, where it is fluidized by compressed air supplied through air conduit 3, and through delivery ports (not shown in the drawing) enters transport dust pipelines 4, and then is supplied to the blast furnace tuyeres. The air consumption for dust transport is measured by the flow meter 5, the flow of the air-dust mixture in the transport pipe 4 is measured by the flow meter 6, and the concentration of the dust-air mixture is by the concentration meter 7. The multiplication unit 8 multiplies the signals proportional to the concentration of coal dust and the air-dust mixture and gives a signal equal to the consumption of coal dust. This signal from multiplication unit 8 is fed to regulator 9, which acts on the adjustments valve 11 of the transport air supply and with its help maintains the specified value of the coal dust consumption, which is measured by the flow meter 10. Similarly, the specified value of the coal discharge on the remaining aerofeaters is maintained. .

Thus, in comparison with the known, the proposed device improves the accuracy of controlling the consumption of coal dust and makes it possible to control its distribution in the blast furnace tuyeres by introducing dust and air mass meters and coal dust, which directly control parameters in transport dust pipes.

Fig, 1

FIG. 2

ff) U9.3

Claims (1)

DEVICE FOR CONTROL OF DUSTY MATERIAL CONSUMPTIONS BY DOMAIN FURNACE LONGS, containing a supply tank, air conditioners, transport dust pipelines with concentrators, air ducts with control valves, air flow regulators, coal dust flow meters, multiplication units, - moreover, the outputs of the concentration meter inputs are connected to which are connected to the inputs of the air flow regulators, characterized in that, in order to increase the accuracy of control and regulation of the flow of coal dust, it additionally dust-air mixture flow meters are introduced, installed on dust pipes, the outputs of which are connected to the second inputs of the multiplication units, the outputs of which are connected to the coal dust flow meters.