Pulse cleaning system for four-hole smoke exhaust pipeline of electric furnace

Abstract

The utility model discloses a pulse cleaning system for a four-hole smoke exhaust pipeline of an electric furnace, which comprises a main pipeline (1), a plurality of water cooling pipelines (2) which are annularly distributed are uniformly arranged on the inner wall of the main pipeline (1), the pulse cleaning system further comprises an air inlet main pipe (3), and at least three air inlet branch pipes (4) which are distributed around the outer parts of the water cooling pipelines (2) are arranged on the air inlet main pipe (3). Nozzles (5) extending into the main pipeline (1) are arranged on the air inlet branch pipes (4), the nozzles (5) correspond to different positions of different water cooling pipelines (2), and annular heat insulation protective sleeves (51) are arranged outside the nozzles (5). The utility model has the characteristics that the efficiency of the nozzle (5) is high, and the nozzle (5) is not easy to damage.

Description

Technical Field

[0001] The utility model relates to a cleaning system for a smoke exhaust pipe, in particular to a pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace. Background Art

[0002] The four-hole smoke exhaust pipe of an electric arc furnace is an important part of the smoke exhaust system of the electric arc furnace. It is usually located on the furnace cover of the electric arc furnace, connected to the water-cooled pipe, and connected to the dust removal pipe, and is used to effectively discharge the smoke generated during the smelting process. In the design of the electric arc furnace, the setting of the four-hole smoke exhaust pipe helps to improve the smoke collection efficiency, reduce environmental pollution, and ensure the smooth progress of the smelting process.

[0003] During the melting process of the electric arc furnace, a large amount of soot and harmful gases are generated. The heavy metal dust and steel slag among them are easy to block the flue when settling on the wall of the water-cooled pipe, affecting the dust removal effect. Therefore, it is necessary to regularly remove the dust accumulation and blockage in the pipe to keep the smoke exhaust system running efficiently. The traditional cleaning work of the four-hole smoke exhaust pipe of the electric arc furnace requires hot shutdown for manual cleaning, which is easy to cause a reduction in the working efficiency of the electric arc furnace and a loss of man-hours; and the existing pulse blowing method has the nozzle fixedly arranged in the flue, with a single nozzle position and a limited nozzle range, resulting in a low blowing efficiency; moreover, due to the high temperature in the flue, it is easy to cause thermal damage to the nozzle and reduce the service life of the nozzle. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace. The utility model has the characteristics of high nozzle efficiency and not being easily damaged.

[0005] The technical solution of the utility model: The pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace includes a main pipe. A plurality of water-cooled pipes are evenly arranged on the inner wall of the main pipe in a circular distribution. It also includes a main intake pipe. At least 3 intake branch pipes are arranged on the main intake pipe and distributed around the outer part of the water-cooled pipes. Nozzles extending into the main pipe are arranged on the intake branch pipes. Each nozzle corresponds to a different position of a different water-cooled pipe, and an annular heat insulation protective sleeve is arranged outside the nozzle.

[0006] In the pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace described above, the intake branch pipes surround the outer periphery of the main pipe in all directions.

[0007] In the pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace described above, a pulse solenoid valve and a pulse air bag are arranged on the main intake pipe.

[0008] In the pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace described above, the intake branch pipes adopt flexible pipes. One end of the flexible pipe is connected to the main pipe, and the other end of the flexible pipe is connected to the nozzle through a clamp.

[0009] In the pulse cleaning system of the four-hole smoke exhaust pipeline of the electric furnace described above, an annular gap is formed between the heat insulation protective sleeve and the nozzle, and protective gas is introduced into the annular gap. The heat insulation protective sleeve is provided with a protective gas inlet pipe communicating with the annular gap.

[0010] In the pulse cleaning system of the four-hole smoke exhaust pipeline of the electric furnace described above, the protective gas includes nitrogen or air.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] By arranging intake branch pipes at multiple different positions and nozzles at different positions on different intake branch pipes, pulse jet blowing is carried out on multiple water-cooled pipes, thereby expanding the cleaning range of the water-cooled pipes; and a heat insulation protective sleeve is arranged outside the nozzle to protect the nozzle and reduce the damage caused to the nozzle by the high-temperature heat in the flue, and the service life of the nozzle is prolonged. Description of the Drawings

[0013] Figure 1 is the schematic plan view of the present utility model.

[0014] Figure 2 is the schematic end view of the present utility model.

[0015] Figure 3 is the schematic structural view of the nozzle.

[0016] The reference signs in the drawings are: 1, main pipeline; 2, water-cooled pipe; 3, intake main pipe; 31, pulse solenoid valve; 32, pulse gas bag; 4, intake branch pipe; 41, clamp; 5, nozzle; 51, heat insulation protective sleeve; 52, annular gap; 53, protective gas inlet pipe. Detailed Embodiment

[0017] The following further illustrates the present utility model in conjunction with the drawings and embodiments, but it shall not be used as the basis for limiting the present utility model.

[0018] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "arrange", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] Embodiment:

[0020] As Figures 1 - 3As shown in the figure, the pulse cleaning system of the four-hole smoke exhaust pipeline of the electric furnace includes a main pipeline 1. A plurality of water-cooling pipelines 2 are evenly arranged on the inner wall of the main pipeline 1 in a circular distribution. It also includes an intake main pipeline 3. At least three intake branch pipelines 4 are arranged on the intake main pipeline 3 and are distributed outside the water-cooling pipelines 2. Nozzles 5 extending into the main pipeline 1 are arranged on the intake branch pipelines 4. Each nozzle 5 corresponds to a different position of a different water-cooling pipeline 2. An annular heat insulation protective sleeve 51 is arranged outside the nozzle 5.

[0021] By setting a plurality of intake branch pipelines 4 at different positions and arranging nozzles 5 at different positions on different intake branch pipelines 4, pulse jetting is carried out corresponding to different positions of a plurality of water-cooling pipelines, so as to expand the cleaning range of the water-cooling pipelines 2; and an annular heat insulation protective sleeve 51 is arranged outside the nozzle 5 to protect the nozzle 5, reduce the damage caused by the high-temperature heat in the flue to the nozzle 5, and extend the service life of the nozzle 5.

[0022] The intake branch pipelines 4 surround the outer periphery of the main pipeline 1 in all directions. The jetting range is expanded and the jetting efficiency is improved.

[0023] A pulse solenoid valve 31 and a pulse air bag 32 are arranged on the intake main pipeline 3. The pulse solenoid valve 31 and the pulse air bag 32 arranged on the intake main pipeline 3, in cooperation with the electric control system, can adjust the jetting frequency and the jetting duration, so as to perform corresponding cleaning according to the actual situation.

[0024] The intake branch pipelines 4 adopt flexible pipelines. One end of the flexible pipeline is connected to the main pipeline 1, and the other end of the flexible pipeline is connected to the nozzle 5 through a clamp 41. The flexible pipeline can adopt a rubber hose with cloth. It has good flexibility, can be bent, and is convenient to install the nozzle 5 at different positions of the main pipeline 1 for jetting treatment. And the nozzle 5 is detachably connected to the flexible pipeline through the clamp 41, which is convenient for repairing and replacing the damaged nozzle 5.

[0025] An annular gap 52 is formed between the heat insulation protective sleeve 51 and the nozzle 5. A protective gas is introduced into the annular gap 52. A protective gas inlet pipe 53 communicating with the annular gap 52 is arranged on the heat insulation protective sleeve 51. A normally open protective gas is introduced into the annular gap 52 through the protective gas inlet pipe 53. The protective gas can be nitrogen or air. The protective gas is discharged into the smoke exhaust pipeline through the nozzle 5 to cool and protect the nozzle 5, and reduce the damage caused by the high temperature in the flue to the nozzle 5.

[0026] The parts not described in detail in the present invention are the prior art, so they will not be specifically described here.

Claims

1. A pulse cleaning system for a four-hole smoke exhaust pipe of an electric furnace, comprising a main pipe (1), wherein a plurality of water cooling pipes (2) are evenly arranged in an annular shape on the inner wall of the main pipe (1), and characterized in that: The invention also comprises an air intake main pipe (3), on which at least three air intake branch pipes (4) are arranged around the outside of the water cooling pipe (2), and on which nozzles (5) extending into the main pipe (1) are arranged, each nozzle (5) corresponding to a different position of a different water cooling pipe (2), and an annular heat insulation protective sleeve (51) is arranged outside the nozzle (5).

2. The pulse cleaning system for the four-hole smoke exhaust pipe of an electric furnace according to claim 1 is characterized in that: The air intake branch pipe (4) surrounds the outer periphery of the main pipeline (1) in all directions.

3. The pulse cleaning system for the four-hole smoke exhaust pipe of an electric furnace according to claim 1 is characterized in that: The air intake manifold (3) is provided with a pulse solenoid valve (31) and a pulse air bag (32).

4. The pulse cleaning system for the four-hole exhaust pipe of an electric furnace according to claim 1 is characterized in that: The air intake branch pipe (4) is a flexible pipe, one end of which is connected to the main pipe (1), and the other end of which is connected to the nozzle (5) via a clamp (41).

5. The pulse cleaning system for the four-hole smoke exhaust pipe of an electric furnace according to claim 1 is characterized in that: An annular gap (52) is formed between the heat-insulating protective sleeve (51) and the nozzle (5), and protective gas is introduced into the annular gap (52). The heat-insulating protective sleeve (51) is provided with a protective gas inlet pipe (53) that is in communication with the annular gap (52).

6. The pulse cleaning system for the four-hole smoke exhaust pipe of an electric furnace according to claim 5 is characterized in that: The protective gas includes nitrogen or air.

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