KR200181272Y1 - Apparatus for removing dust on metal seat of lower seal valve of furnace top - Google Patents

Abstract

The present invention relates to an apparatus for facilitating sealing of rubber packing by preventing foreign matter from adhering to the metal seat mounted on the lower seal valve of the blast furnace. In more detail, the present invention relates to a device for preventing adhesion of foreign matter to the lower seal valve metal seat to enable smooth charging of the lower seal valve by completely removing the foreign material by spraying nitrogen (N ₂ ) at a high pressure on the metal sheet.

The present invention is a device for preventing the adhesion of foreign matter to the metal seat attached to the lower seal valve of the blast furnace to facilitate the sealing of the louver packing, a plurality of devices disposed adjacent to the metal seat of the lower seal valve A nitrogen injection nozzle is provided, and a nitrogen pipe connected to the nitrogen injection nozzle is provided with an automatic opening and closing valve, and the automatic opening and closing valve is connected to an air pilot valve operated by a striker rotated when the disk of the lower chamber valve is rotated. In the opening and closing of the lower chamber valve, nitrogen gas is injected into the metal sheet to provide a top lower seal valve metal sheet foreign matter adhesion prevention device for preventing foreign matters from sticking.

Description

APASSATUS FOR REMOVING DUST ON METAL SEAT OF LOWER SEAL VALVE OF FURNACE TOP}

The present invention relates to an apparatus for facilitating sealing of rubber packing by preventing foreign matter from adhering to the metal seat mounted on the lower seal valve of the blast furnace. In more detail, the present invention relates to a device for preventing adhesion of foreign matter to the lower seal valve metal seat to enable smooth charging of the lower seal valve by completely removing the foreign material by spraying nitrogen (N ₂ ) at a high pressure on the metal sheet.

In general, the blast furnace facility 100 is first put into the receiving chute dampa 112 and the top bunker (TOP BUNKER) 120 through the charging belt conveyor 110 of the top to charge the ore therein, The ore is controlled by the raw material control gate 122 at the lower side thereof, and is evenly distributed according to the rotational speed and the tilt angle while passing through the drive unit 125 located at the lower side thereof. The charging in the blast furnace 130 is made.

In order to charge the ore into the top bunker 120 from the charging valve conveyor 110 from the charging valve conveyor 110 in the blast furnace installation 100, the internal pressure of the top bunker 120 should be at atmospheric pressure, When charging into the blast furnace 130 from the top bunker 120, the pressure in the top bunker 120 and the blast furnace 130 must be the same, the charge of the ore is made.

As such, when the ore is charged into the blast furnace 130, the pressure adjustment between the top bunker 120 and the blast furnace 130 is made in a uniform back pressure system. Valves 135a and 135b are provided.

Among the plurality of upper and lower seal valves 135a and 135b, the lower seal valve 135b has a nominal diameter of 1001100mm, two installations, a swing type, and a hydraulic cylinder driving method many times per day (approximately 120 times). In order to smoothly load the contents into the blast furnace in which the pressure of approximately 2.4kg / ㎠ acts, it is opened to perform the equalization back pressure, and the first pressure during the charging in the state of storing the contents in the top bunker 120 is performed. The charging pressure is a semi-clean gas, and the secondary charging is performed with nitrogen (N ₂ ). The first charge of the equalization pressure is performed with a semi-clean gas at the rear end of the first venturi scrubber (not shown). The semi-clean gas contains a large amount of moisture and dust, and the moisture containing dust is stored in the primary pressure-filling pipe ( It flows through the wall of the top bunker 120 through the primary pressure side (not shown), the dust discharge side, and reaches the lower seal valve 135b. As the lower seal valve 135b is installed at an angle of about 30 degrees, as shown in FIG. 2, water and dust 140 are accumulated on the lower seal valve 135b. In this state, when the secondary pressure is reduced to the secondary pressure side, when the lower seal valve 135b is opened downward, most of the human body falls into the furnace, and water containing a small amount of dust is 30 degrees in the metal sheet 150. Since it is installed inclined, the water is evaporated and the dust is fixed while flowing down the metal sheet 150.

This phenomenon is repeated a number of times as the foreign matter is stuck to the metal sheet 150 over a portion in a few days, as shown in Figure 3 in the rubber packing 162 of the disk 160 in contact with the metal sheet 150 Damage will result in poor sealing and impossible.

In addition, the rubber packing 162, which is poorly sealed in this manner, requires frequent repairs, thereby degrading maintenance workability.

The present invention has been proposed to solve the above problems, the purpose is to remove the foreign material by spraying nitrogen (N ₂ ) at high pressure on the metal sheet to remove the foreign matter in the bottom of the road to achieve a seamless charging of the lower seal valve It is an object of the present invention to provide a seal valve metal seat foreign matter sticking prevention device.

1 is an external view of a top equipment;

2 is a cross-sectional view showing a state in which water and dust are accumulated on a metal seat in a lower chamber valve of a top equipment;

3 is a detailed view showing a state in which dust is attached on the metal seat in the lower chamber valve of the top equipment;

Figure 4 is a mounting configuration of the striker for detecting the rotation of the metal seat in the lower chamber valve of the top equipment;

Figure 5 is a block diagram showing a device for preventing foreign matter stuck to the lower seal valve metal seat according to the present invention;

Figure 6 is a pneumatic circuit diagram of the lower seal valve metal seat foreign matter adhesion prevention device according to the present invention;

7 is a nozzle mounting state of the lower seal valve metal seat foreign matter adhesion prevention device according to the present invention.

Explanation of symbols on the main parts of the drawings

10 ..... Striker 20 ..... Frame

30 ..... air pilot valve 37 ..... conduit

40 ..... Nitrogen nozzle 45 ..... Nitrogen tube

50 ..... Automatic opening and closing valve 100 .... Blast furnace equipment

120 .... Top Bunker 130 ....

135a, 135b ... upper and lower sealing valve

The present invention to achieve the above object,

In the device for preventing the sealing of the louver packing by preventing foreign matter from adhering to the metal seat mounted on the lower seal valve of the blast furnace,

A plurality of nitrogen injection nozzles disposed adjacent to the metal seat of the lower chamber valve, the nitrogen pipe connected to the nitrogen injection nozzle is provided with an automatic opening and closing valve, and the automatic opening and closing valve rotates a disk of the lower chamber valve. An air pilot valve operated by a striker rotated to the lower seal valve metal seat foreign matter adhesion prevention device, characterized in that when opening and closing the lower chamber valve, by spraying nitrogen gas to the metal seat to prevent foreign matters from sticking By providing.

Hereinafter, with reference to the accompanying drawings, the lower seal valve metal seat foreign matter adhesion prevention device (1) according to the present invention as follows.

First, the lower chamber valve in which the striker 10 for operating the foreign matter attachment prevention apparatus 1 of the present invention is described as follows.

As shown in FIG. 4, the lower chamber valve 135b is rotated to the lower side to open the disk 160 equipped with the louver packing 162 around the arm 170. In this case, the hydraulic cylinder 165 rotates the arm 170 so that the disk 160 mounted at the tip of the arm 170 is rotated to the lower side, as shown in FIG. It descends from the metal seat 150 of the port to open the valve 135b port. However, in contrast to the above, when the hydraulic cylinder 165 rotates the arm 170, the rubber packing 162 of the disk 160 contacts the metal sheet 150 to achieve a sealing function.

In operation of the lower chamber valve 135b, the striker 10 is welded to the striker base 14, as shown in FIG. 4, and the striker base 14 swings with the striker base fixing bolt 16. When the lower seal valve 135b is coupled to the arm 170 and is downwardly opened and closed, the pilot valve striker 10 is configured to move at the same time.

The striker 10 opens and closes the air pilot valve 30 connected to one side of the frame 20 to which the arm 170 is fixed through the bracket 22.

Therefore, the striker 10 is rotated at the same time when the arm 170 is rotated downward to touch the operation period 32 of the air pilot valve 30, the air pilot valve 30 is air flows through the inside To do that.

Meanwhile, as illustrated in FIG. 5, a plurality of nitrogen injection nozzles 40 are mounted while maintaining a predetermined angle near the port of the lower chamber valve 135b, and nitrogen pipes 45 are respectively provided to the nitrogen injection nozzles 40. ) Is connected. In addition, the nitrogen pipe 45 has an automatic opening and closing valve 50 in the middle thereof, and the automatic opening and closing valve 135b has a conduit 37 of the air pilot valve 30 for giving a pressure to open and close the signal. ) Is connected.

This pneumatic piping is shown in FIG. The nitrogen nozzle 40 is connected to the nitrogen pipe 45 to which the pressure of 10-14 Kgf / cm 2 is supplied, respectively, and extends toward the metal seat 150 of the first and second lower chamber valves 135b. The nitrogen pipe 45 has an automatic opening and closing valve 50 for each lower chamber valve 135b, and an air pilot valve 30 provided for each lower chamber valve 135b for the automatic opening and closing valve 50 side. Conduit 37 is connected.

The lower seal valve metal seat foreign matter sticking prevention device 1 of the present invention configured as described above, when the lower seal valve 135b is opened and closed as shown in FIG. 4, the striker 10 for the pilot valve 30 is rotated as air. By opening the pilot valve 30, the air passes through the air pilot valve 30 at the outlet side of the air line 37 to operate the pneumatic automatic shutoff valve 50 and supply nitrogen to the nitrogen nozzle 40 to supply the metal sheet ( Remove and prevent foreign matter (D) attached to the 150).

Table 1 below is a table showing the pressure, flow rate and injection time of nitrogen gas injected from the nitrogen nozzle (40).

Pressure (kg / ㎠) 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Foreign matter remaining in 1 second injection (mm) 8 7 6 5 4 3 2 2 One 0 0 0 0 0 Residual Foreign Matter in 2 Second Injection (mm) 8 5 4 3 2 One 0 0 0 0 0 0 0 0 Residual amount of foreign substance in 3 seconds injection (mm) 8 5 4 2 One 0 0 0 0 0 0 0 0 0 Flow rate (nm ³ / min) 1.29 2.11 2.70 3.17 3.59 3.96 4.29 4.61 4.90 5.18 5.44 5.69 5.93 6.16

Nitrogen pressure of the present invention is the top pressure + 5.61kg / ㎠ ~ top pressure + 11.6kg / ㎠ (flow rate: 4.29nm ³ / min or more), as shown in Table 1, during the lower chamber valve 135b operating time (titration) 2-3 seconds) to be sprayed on the metal sheet 150 in principle.

The reason is that 13kg / cm2 (5.44nm ³ / min) or more continuously sprayed on the metal sheet 150 for two weeks, the gas cutting (GAS CUTTING) is fine because the blast furnace gas (BFG) contains a large amount of dust (DUST) Woke up. Accordingly, if the lower chamber valve 135b is operated 420 times a day for 2 or 3 seconds, the replacement cycle of the metal seat 150 becomes about 2 years, so 9-11 kg / cm 2 (flow rate: 4.29-4.90 nm ³ / min), the spraying time is sprayed on the metal sheet 150 for 2-3 seconds, there is no risk of gas cutting (GAS CUTTING) for at least two years.

Since the operation time of the lower seal valve 135b takes about 4 seconds to open and close, the striker 10 operates to prevent the foreign matter sticking preventing device from operating while opening or closing the louver packing 162 of the disc 160. Adjust the position.

As shown in (a) b) of FIG. 7, the angle of the nozzle 40 for removing the foreign matter of the metal sheet 150 is 14-16 ° at the front side and the angle θ2 at the side cross section. As shown by 9), it is ideally possible to remove foreign matters at 9-11 °.

As described above, the foreign material adhesion preventing device of the metal seat 150 of the lower lower seal valve 135b is mechanically sprayed with nitrogen (N ₂ ) to the metal seat 150 to form the metal seat 150 of the lower seal valve 135b. By preventing foreign matter from adhering to the), the sealing of the louver packing 162 is facilitated.

As described above, according to the present invention, the foreign matter is fixed to the metal seat 150 of the lower seal valve 135b when the lower seal valve 135b operates, the automatic removal through the nitrogen injection is possible by the lower seal valve ( The perfect sealing of 135b) ensures a smooth ore loading into the blast furnace.

Claims (2)

In the device for preventing the foreign matter from adhering to the metal seat 150 mounted on the lower seal valve 135b of the blast furnace to facilitate the sealing of the louver packing 162, A plurality of nitrogen injection nozzles 40 disposed adjacent to the metal seat 150 of the lower chamber valve 135b, and the nitrogen pipe 45 connected to the nitrogen injection nozzles 40, the automatic opening and closing valve 50 Is provided, the automatic opening and closing valve 50 is connected to the air pilot valve 30 which is operated by the striker 10 is rotated when the disk 160 of the lower chamber valve (135b) is connected to the lower chamber valve When the opening and closing of the 135b, the metal seat 150 is sprayed with nitrogen gas to prevent the foreign matter stuck to the lower seal valve metal seat foreign matter adhesion prevention device. The angle of the nozzle 40 for removing the foreign matter of the metal sheet 150 is 14-16 ° from the front and 9-11 ° from the side cross section. The lower seal valve metal seat foreign matter seizure prevention device, characterized in that configured to hold.