Arc furnace flue dust removal device

Abstract

This utility model discloses a dust removal device for electric arc furnace flues, comprising a flue connected to the exhaust port of the electric arc furnace. The flue includes a connecting section, a heat exchange section, a first dust removal section, and a second dust removal section connected sequentially, with the connecting section connected to the exhaust port of the electric arc furnace. A first opening is provided below the first dust removal section, and a dust removal chamber is connected below the first opening. A dust removal bag is installed inside the dust removal chamber, with its opening connected to the first opening. A flow divider is provided on the inner wall of the first dust removal section to the right of the first opening. An arched cavity is provided above the second dust removal section, with a second opening at the top of the second dust removal section connecting to the arched cavity. A spray assembly is provided at the center of the top of the arched cavity. This utility model achieves multi-stage purification of flue gas, uses spiral heat exchange tubes to improve cooling efficiency, and employs a detachable sealing structure to ensure convenient equipment maintenance, effectively solving the problem of direct emission pollution from electric arc furnace flue gas.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology for electric arc furnace flues, and in particular to a dust removal device for electric arc furnace flues. Background Technology

[0002] Electric arc furnaces are commonly used equipment in the field of metal smelting. Currently, electric arc furnaces present significant environmental problems during operation. Existing electric arc furnaces typically lack effective flue gas dust removal mechanisms, generating large amounts of hot gas and dust during metal smelting. However, current technology often involves directly venting the dust-laden hot gas outdoors.

[0003] This method of disposal results in large amounts of dust being directly released into the atmosphere, causing severe air pollution. With increasingly stringent environmental protection requirements, this environmentally unfriendly emission method can no longer meet the needs of social development. The emission of large amounts of dust also exacerbates the PM2.5 concentration in the air, posing a threat to human health and contradicting the principles of sustainable development.

[0004] Therefore, developing a device that can effectively remove dust from the flue of electric arc furnaces, reduce atmospheric pollution, and improve air quality is of urgent practical significance. Utility Model Content

[0005] The main objective of this invention is to provide a dust removal device for electric arc furnace flues, which addresses the problems mentioned in the background section.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A dust removal device for an electric arc furnace flue includes a flue connected to the furnace exhaust port. The flue includes a connecting section, a heat exchange section, a first dust removal section, and a second dust removal section connected sequentially. The connecting section is connected to the furnace exhaust port. The first dust removal section is inclined, with a first opening at its lower part, and a dust removal chamber connected below the first opening. A dust collector bag is installed inside the dust removal chamber, with its opening connected to the first opening. A flow divider is installed on the inner wall of the first dust removal section to the right of the first opening. The second dust removal section is horizontally positioned, with an arched cavity above it. A second opening at the top of the second dust removal section connects to the arched cavity. A spray assembly is installed at the center of the top of the arched cavity, and a second exhaust pipe connects to the top of the arched cavity.

[0008] Furthermore, the heat exchange section is embedded with a spiral heat exchange tube, with an inlet pipe connected to the right end of the heat exchange tube and an outlet pipe connected to the left end of the heat exchange tube.

[0009] Furthermore, the spray assembly includes a water supply pipe and an atomizing nozzle, with the water supply pipe extending downwards into the top of the arched cavity and communicating with the atomizing nozzle.

[0010] Furthermore, a sealing cover is provided at the right end of the second dust removal section.

[0011] Furthermore, a first row of empty pipes is connected to one side of the dust removal chamber.

[0012] Furthermore, the tilt angle of the first dust removal section is 45° to 60°.

[0013] This utility model also includes other components that enable the electric arc furnace flue dust removal device to function normally. These devices or components all employ conventional techniques in the art. Furthermore, devices and components not specified in this utility model all employ conventional techniques in the art, such as the dust collector bags mentioned in this application. In specific implementation, appropriate equipment or component models can be selected according to the specific working scenario.

[0014] The working principle of this invention is as follows: When the flue gas generated by the electric arc furnace enters the flue, it first flows through the heat exchange section. At this time, flowing tap water is introduced into the heat exchange tubes to cool the high-temperature flue gas. Subsequently, the flue gas enters the inclined first dust removal section. Under the action of the diversion plate, part of the flue gas enters the dust removal bag through the first opening to complete the filtration and dust removal. The separated particulate matter is retained in the bag, and the purified gas is discharged through the first exhaust pipe. The other part of the flue gas enters the second dust removal section through the gap above the diversion plate, rises through the second opening into the arched cavity, and is sprayed with dust by the atomizing nozzle. The purified gas is discharged through the second exhaust pipe. The detachable design of the sealing cover facilitates the periodic removal of dirt deposited in the second dust removal section, and the spiral heat exchange tube structure effectively improves the heat exchange efficiency.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Achieved graded dust removal treatment: The flue gas is diverted by a diversion plate and a dual purification method of bag filter dust removal and atomized spray dust removal is adopted to effectively reduce the concentration of particulate matter in the flue gas.

[0017] 2. Improved heat exchange efficiency: The spiral heat exchange tube structure increases the heat exchange area, and the forced heat exchange is carried out in conjunction with flowing tap water, which significantly reduces the initial temperature of the flue gas.

[0018] 3. Facilitates system maintenance: The removable sealing cover design provides a convenient operating channel for cleaning sediment in the second dust removal section, ensuring the continuous and stable operation of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a dust removal device for an electric arc furnace flue according to the present invention.

[0020] In the diagram: 1. Electric arc furnace; 2. Connecting section; 3. Heat exchange section; 4. First dust removal section; 41. First opening; 42. Diverter plate; 5. Second dust removal section; 51. Second opening; 52. Sealing cover; 6. Arched cavity; 61. Water supply pipe; 62. Atomizing nozzle; 63. Second drain pipe; 7. Heat exchange tube; 71. Water inlet pipe; 72. Water outlet pipe; 8. Dust removal chamber; 81. Dust collector bag; 82. First drain pipe. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Example:

[0023] like Figure 1 As shown, a dust removal device for an electric arc furnace flue includes a flue connected to the exhaust port of the electric arc furnace 1. The flue includes a connecting section 2, a heat exchange section 3, a first dust removal section 4, and a second dust removal section 5 connected in sequence. The connecting section 2 is connected to the exhaust port of the electric arc furnace 1. The first dust removal section 4 is inclined, and a first opening 41 is opened below the first dust removal section 4. A dust removal chamber 8 is connected below the first opening 41. A dust removal bag 81 is installed in the dust removal chamber 8, and the opening of the dust removal bag 81 is connected to the first opening 41. A flow divider 42 is installed on the inner wall of the first dust removal section 4 to the right of the first opening 41. The second dust removal section 5 is horizontally arranged, and an arched cavity 6 is installed above the second dust removal section 5. A second opening 51 is opened at the top of the second dust removal section 5 and communicates with the arched cavity 6. A spray assembly is installed at the center of the top of the arched cavity 6, and a second exhaust pipe 63 is connected to the top of the arched cavity 6.

[0024] Specifically, the spray assembly includes a water supply pipe 61 and an atomizing nozzle 62. The water supply pipe 61 extends downward into the top of the arched cavity 6 and communicates with the atomizing nozzle 62. The inclination angle of the first dust removal section 4 is 45°.

[0025] In addition, a spiral heat exchange tube 7 is embedded in the heat exchange section 3. The right end of the heat exchange tube 7 is connected to a water inlet pipe 71, and the left end of the heat exchange tube 7 is connected to a water outlet pipe 72. A sealing cover 52 is provided at the right end of the second dust removal section 5. A first exhaust pipe 82 is connected to one side of the dust removal chamber 8.

[0026] The working principle of this utility model's electric arc furnace flue dust removal device is as follows: When the flue gas generated by the electric arc furnace 1 enters the flue, it first flows through the heat exchange section 3. At this time, flowing tap water is introduced into the heat exchange tube 7 to cool the high-temperature flue gas. Subsequently, the flue gas enters the inclined first dust removal section 4. Under the action of the diversion plate 42, part of the flue gas enters the dust removal bag 81 through the first opening 41 to complete the filtration and dust removal. The separated particulate matter is retained in the bag, and the purified gas is discharged through the first exhaust pipe 82. The other part of the flue gas enters the second dust removal section 5 through the gap above the diversion plate 42, rises through the second opening 51 to the arched cavity 6, and is sprayed with dust by the atomizing nozzle 62. The purified gas is discharged through the second exhaust pipe 63. The detachable design of the sealing cover 52 facilitates the periodic removal of dirt deposited in the second dust removal section 5, and the spiral heat exchange tube 7 structure effectively improves the heat exchange efficiency.

[0027] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.

Claims

1. An electric arc furnace flue dust removal device comprising a flue communicating with a smoke outlet of an electric arc furnace (1), characterized in that: The flue includes a connecting section (2), a heat exchange section (3), a first dust removal section (4), and a second dust removal section (5) connected in sequence. The connecting section (2) is connected to the exhaust port of the electric arc furnace (1). The first dust removal section (4) is inclined and has a first opening (41) below it. A dust removal chamber (8) is connected below the first opening (41). A dust removal bag (81) is installed in the dust removal chamber (8), and the mouth of the dust removal bag (81) is connected to the first opening (41). A diversion plate (42) is installed on the inner wall of the first dust removal section (4) to the right of the first opening (41). The second dust removal section (5) is horizontal and has an arched cavity (6) above it. A second opening (51) is opened at the top of the second dust removal section (5) and is connected to the arched cavity (6). A spray assembly is installed at the center of the top of the arched cavity (6), and a second exhaust pipe (63) is connected to the top of the arched cavity (6).

2. The electric arc furnace flue dedusting device according to claim 1, characterized in that: The heat exchange section (3) is embedded with a spiral heat exchange tube (7). The right end of the heat exchange tube (7) is connected to a water inlet pipe (71), and the left end of the heat exchange tube (7) is connected to a water outlet pipe (72).

3. The dust removal device for electric arc furnace flue gas according to claim 1, characterized in that: The spray assembly includes a water supply pipe (61) and an atomizing nozzle (62). The water supply pipe (61) extends downward into the top of the arched cavity (6) and communicates with the atomizing nozzle (62).

4. The dust removal device for electric arc furnace flue gas according to claim 1, characterized in that: A sealing cover (52) is provided at the right end of the second dust removal section (5).

5. The dust removal device for electric arc furnace flue gas according to claim 1, characterized in that: The dust removal chamber (8) is connected to a first exhaust pipe (82) on one side.

6. The dust removal device for electric arc furnace flue gas according to claim 1, characterized in that: The tilt angle of the first dust removal section (4) is 45° to 60°.

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