Honeycomb nozzle for eliminating noise of blast furnace hot blast stove

Abstract

The utility model relates to a honeycomb nozzle for eliminating noise of blast furnace hot blast furnace, belongs to metallurgical industry high pressure waste flue gas emission noise elimination technical field. Technical scheme is: this honeycomb nozzle is installed at the bottom of hot blast furnace chimney (9), it contains cylindrical barrel (1), one end of cylindrical barrel (1) is closed cylinder bottom (2), the other end is equipped with ring sealing plate (3), is equipped with connecting pipe (4) on ring sealing plate (3), connecting pipe (4) is connected with hot blast furnace waste gas pipeline (6), is equipped with a plurality of exhaust holes (5) on cylindrical barrel (1) and cylinder bottom (2);The diameter of exhaust hole (5) of cylindrical barrel (1) and cylinder bottom (2) is 2-10mm, and the interval is 20-100mm;Cylindrical barrel (1) is fixed at the bottom of hot blast furnace chimney (9) through support (8). The utility model has the beneficial effect that can make the noise of hot blast furnace discharge high pressure waste gas to be minimum.

Description

Technical Field

[0001] This utility model relates to a honeycomb nozzle for eliminating noise from blast furnace hot blast stoves, belonging to the technical field of noise elimination for high-pressure waste gas emissions in the metallurgical industry. Background Technology

[0002] In the blast furnace ironmaking process, the hot blast stove, as a device for heating cold air, needs to transition from the blast period to the combustion period. Before this transition, the high-pressure exhaust gas inside the hot blast stove needs to be discharged. At this time, the exhaust gas pressure inside the furnace reaches as high as 0.4-0.5 MPa, and the airflow velocity is relatively fast during the discharge process. The noise caused by the high-speed airflow can reach over 110 decibels, lasting for about 100 seconds. Each blast furnace discharges 20-30 times a day, and the enormous noise seriously affects the normal work of the employees.

[0003] To address this issue, silencers need to be installed at the outlet of the hot blast stove exhaust pipe to reduce noise generated during hot blast stove replacement. Some companies install general-purpose impedance silencers on the exhaust pipes, but the noise reduction effect is not significant due to the high airflow velocity. Other companies install flow-blocking and pressure-reducing small-hole injection silencers at the end of the exhaust pipes, but because the silencer outlet is still inside the flue made of hot blast stove steel pipes, the residual noise after noise reduction still accumulates and resonates within the flue, resulting in a poor overall noise reduction effect. To better reduce exhaust noise, this utility model provides a honeycomb nozzle for discharging high-pressure gas and its associated installation and usage methods. Utility Model Content

[0004] The purpose of this invention is to provide a honeycomb nozzle for eliminating noise from a blast furnace hot blast stove, which can minimize the noise from the high-pressure exhaust gas emitted by the hot blast stove and solve the problems existing in the background art.

[0005] The technical solution of this utility model is: A honeycomb nozzle for eliminating noise in a blast furnace hot blast stove is installed at the bottom of the hot blast stove chimney. It includes a cylindrical body, one end of which is a closed bottom, and the other end is provided with an annular sealing plate. A connecting pipe is provided on the annular sealing plate, and the connecting pipe is connected to the hot blast stove exhaust gas pipe. Multiple exhaust holes are provided on the cylindrical body and the bottom of the cylinder.

[0006] The diameter of the exhaust holes in the cylindrical body and bottom is 2-10mm, and the spacing is 20-100mm.

[0007] The cylindrical body is fixed to the bottom of the hot blast stove chimney by a bracket.

[0008] The cylindrical body is horizontal, and the distance between its centerline and the bottom of the hot blast stove chimney is greater than 1 meter.

[0009] The hot blast furnace exhaust gas pipeline is equipped with a main shut-off valve.

[0010] The beneficial effects of this utility model are: it can minimize the noise of high-pressure exhaust gas from hot blast stoves, thus meeting the requirements of occupational health standards. Attached Figure Description

[0011] Figure 1 This is a diagram showing the outline of a honeycomb nozzle. Figure 2 This is a cross-sectional view (AA) of a honeycomb nozzle. Figure 3 This is a schematic diagram of the honeycomb nozzle from direction A. Figure 4 This is a schematic diagram of the honeycomb nozzle from direction B. Figure 5 This is a plan view of the honeycomb nozzle installation. Figure 6 This is an elevation view of the honeycomb nozzle installation. In the diagram: 1. Cylindrical body; 2. Bottom of cylinder; 3. Annular sealing plate; 4. Connecting pipe; 5. Exhaust port; 6. Hot blast furnace exhaust gas pipe; 7. Main pipe shut-off valve; 8. Support; 9. Hot blast furnace chimney. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and examples.

[0013] See attached document Figure 1-6 A honeycomb nozzle for eliminating noise in a blast furnace hot blast stove is installed at the bottom of the hot blast stove chimney 9. It includes a cylindrical body 1, one end of which is a closed bottom 2, and the other end is provided with an annular sealing plate 3. A connecting pipe 4 is provided on the annular sealing plate 3, and the connecting pipe 4 is connected to the hot blast stove exhaust gas pipe 6. Multiple exhaust holes 5 are provided on the cylindrical body 1 and the bottom 2.

[0014] In this embodiment, refer to the appendix Figure 1-6 The honeycomb-shaped nozzle includes a cylindrical body 1, a bottom 2, an annular sealing plate 3, and a connecting pipe 4. The cylindrical body 1 and the bottom 2 have multiple vent holes 5, wherein: The cylindrical body 1 has a diameter of φ1000mm and a length of 3000mm. The bottom 2 has a diameter of φ1000mm. The annular sealing plate 3 has an outer diameter of φ1000mm and an inner hole diameter of φ500mm. The connecting pipe 4 has a diameter of φ500mm. Multiple vent holes 5 are opened on the cylindrical body 1 and the bottom 2. The diameter of the vent holes is 3mm and the spacing between the vent holes is 30mm.

[0015] The honeycomb nozzle is installed at the bottom of the hot blast stove chimney 9 and is supported and fixed to the ground inside the chimney by the bracket 8. The net distance between the honeycomb nozzle and the ground is 1 meter. The connecting pipe 4 of the honeycomb nozzle is connected to the original hot blast stove exhaust pipe through the hot blast stove waste pipe 6. The hot blast stove exhaust pipe 6 has a main shut-off valve 7 installed before entering the hot blast stove flue.

[0016] During the hot blast stove exhaust gas emission process, first open the hot blast stove exhaust gas valve and hold for 10 seconds until the high-pressure exhaust gas fills the hot blast stove exhaust gas pipe. Then, open the main shut-off valve 7. The hot blast stove exhaust gas enters the hot blast stove chimney 9 through the exhaust gas emission pipe 6 and honeycomb nozzles, completing the exhaust gas emission. The exhaust gas flow is divided and depressurized by the vent holes in the honeycomb nozzles, and the remaining noise is isolated by the chimney. At this point, the noise generated by the exhaust gas pressure meets the requirements of occupational health standards. After the exhaust gas is completely discharged, close the main shut-off valve 7.

Claims

1. A honeycomb nozzle for eliminating noise in a blast furnace hot blast stove, characterized in that: The honeycomb nozzle is installed at the bottom of the hot blast stove chimney (9). It includes a cylindrical body (1), one end of which is a closed bottom (2), and the other end is provided with an annular sealing plate (3). A connecting pipe (4) is provided on the annular sealing plate (3), and the connecting pipe (4) is connected to the hot blast stove exhaust pipe (6). Multiple exhaust holes (5) are provided on the cylindrical body (1) and the bottom (2).

2. The honeycomb nozzle for eliminating noise in a blast furnace hot blast stove according to claim 1, characterized in that: The diameter of the exhaust holes (5) of the cylindrical body (1) and the bottom (2) is 2-10 mm, and the spacing is 20-100 mm.

3. A honeycomb nozzle for eliminating noise in a blast furnace hot blast stove according to claim 2, characterized in that: The cylindrical body (1) is fixed to the bottom of the hot blast stove chimney (9) by a bracket (8).

4. A honeycomb nozzle for eliminating noise in a blast furnace hot blast stove according to claim 3, characterized in that: The cylindrical body (1) is horizontal, and its center line is more than 1 meter away from the bottom of the hot air furnace chimney (9).

5. A honeycomb nozzle for eliminating noise in a blast furnace hot blast stove according to claim 1, characterized in that: The hot air furnace exhaust gas pipeline (6) is equipped with a main shut-off valve (7).

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