High-temperature smoke dust separation device for submerged arc furnace

Abstract

The utility model discloses a submerged arc furnace high-temperature smoke dust separation device which comprises a separation tank, and a dust removal assembly is arranged in the separation tank. The dust removal assembly comprises a liquid injection pipe welded to the top end of one side wall of the separation tank, a spraying pipe vertically connected to one end of the liquid injection pipe and atomizing nozzles distributed on the outer side wall of the spraying pipe in a circumferential array mode. The smoke dust separation device has the beneficial effects that an original vertical spraying mode is changed into a horizontal spraying mode, namely, the spraying direction of liquid medicine is vertical to the flowing direction of smoke gas, so that the liquid medicine can change the flowing direction of the smoke gas, the contact time of the liquid medicine and the smoke gas is prolonged, and the smoke dust separation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke and dust separation devices, in particular to a high-temperature smoke and dust separation device for an electric arc furnace. Background Art

[0002] The production of submerged arc furnaces in the metallurgical industry is a high-energy and high-material consumption industry, and is a key industry for national environmental protection and energy-saving transformation. In order to respond to the requirements of governments at all levels for environmental protection and clean transformation of high-energy-consuming metallurgical industries, it is the inevitable development direction of submerged arc furnaces to continuously improve the research on clean production technology of submerged arc furnaces and the resource utilization of submerged arc furnace emissions. A smoke separation device is required when submerged arc furnaces are discharged.

[0003] The existing high-temperature smoke and dust separation device for an electric arc furnace removes dust from the flue gas by means of a spray tower during use, that is, the sprayed liquid reacts with the tiny particles in the flue gas to achieve smoke and dust separation. During the separation process, the smoke has a high flow rate under the action of the induced draft fan, and the flow direction of the smoke in the tower is fixed, which results in a limited contact time with the liquid medicine, thereby affecting the separation effect of the smoke and dust. Therefore, a high-temperature smoke and dust separation device for an electric arc furnace is urgently needed to solve the above problem. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is aimed at the current status of the existing technology. Now a high-temperature smoke dust separation device for a submerged arc furnace is provided, which changes the original vertical spray into a horizontal spray, can apply external force to the flowing smoke, change its flow direction, increase the contact time between the liquid medicine and the smoke, and has a good smoke dust separation effect.

[0006] (II) Technical solution

[0007] The utility model is implemented through the following technical scheme: the utility model proposes a high-temperature smoke separation device for an electric arc furnace, comprising a separation tank, in which a dust removal component is arranged, and the dust removal component comprises an injection pipe welded to the top of one side wall of the separation tank, a spray pipe vertically connected to one end of the injection pipe, and atomizing nozzles distributed in a circular array on the outer side wall of the spray pipe.

[0008] Furthermore, the injection pipe is welded to the spray pipe, the atomizing nozzle is installed on the outer side wall of the spray pipe through threads, and the spray pipe is arranged along the central axis of the separation tank.

[0009] By adopting the above technical scheme, during the process of dust removal from flue gas, the medicine liquid is sprayed through the injection pipe and the atomizing nozzle on the spray pipe to contact with the flue gas, and can react with the tiny particles in the flue gas, thereby removing the dust from the flue gas. In addition, since the spraying direction of the medicine liquid is perpendicular to the flow direction of the flue gas, the medicine liquid can change the flow direction of the flue gas, thereby increasing the contact time between the medicine liquid and the flue gas, and achieving a good smoke and dust separation effect.

[0010] Furthermore, the dust removal assembly also includes a gas distribution plate obliquely arranged at the bottom of the separation tank, and the surface of the gas distribution plate is covered with micropores.

[0011] By adopting the above technical solution, the gas distribution plate can evenly distribute the flue gas in the separation tank.

[0012] Furthermore, the dust removal assembly also includes a demister fixed to the top of the separation tank, and the demister contains hygroscopic material.

[0013] By adopting the above technical solution, the demister can dehumidify the flue gas after dust removal.

[0014] Furthermore, a liquid collecting cylinder is welded to the bottom end of the separation tank, and the liquid collecting cylinder is in communication with the separation tank.

[0015] By adopting the above technical solution, the reacted liquid falls into the liquid collecting cylinder for collection.

[0016] Furthermore, a reflux pipe is led out from one side wall of the liquid collecting cylinder, and a solenoid valve is installed on the reflux pipe through a thread.

[0017] By adopting the above technical solution, the medicine liquid in the liquid collecting barrel can also settle naturally, that is, the particles in the smoke and dust settle in the liquid collecting barrel at the bottom, and the settled medicine liquid is reused through the reflux pipe, and the solenoid valve controls the opening and closing of the reflux pipe.

[0018] Furthermore, an air inlet pipe is led out from a side wall of the bottom end of the separation tank, and a connecting flange is reserved at one end of the air inlet pipe.

[0019] By adopting the above technical solution, the flue gas after cooling enters the separation tank through the air inlet pipe.

[0020] Furthermore, an exhaust pipe is led out from the top of the separation tank.

[0021] By adopting the above technical solution, the smoke after dehumidification and dust removal is discharged through the exhaust pipe.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] In order to solve the problem that the existing high-temperature smoke and dust separation device of the electric arc furnace removes dust from the flue gas by means of a spray tower during use, that is, the sprayed medicine liquid reacts with the tiny particles in the flue gas to achieve smoke and dust separation. During the separation process, the above method has a high flow rate under the action of the induced draft fan, and the flow direction of the flue gas in the tower is fixed, which leads to a limited contact time between the flue gas and the medicine liquid, thereby affecting the separation effect of the smoke and dust. The utility model converts the original vertical spraying method into a horizontal spraying method, that is, the spraying direction of the medicine liquid is perpendicular to the flow direction of the smoke, so that the medicine liquid can change the circulation direction of the smoke, increase the contact time between the medicine liquid and the smoke, and achieve a good smoke and dust separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a high-temperature smoke and dust separation device for a submerged arc furnace described in the utility model;

[0026] Figure 2 It is a main cross-sectional view of a separation tank in a high-temperature smoke and dust separation device for an electric arc furnace described in the utility model.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Separation tank; 2. Dust removal assembly; 201. Liquid injection pipe; 202. Spray pipe; 203. Atomizing nozzle,

[0029] 204. Gas distribution plate; 205. demister; 3. exhaust pipe; 4. air inlet pipe; 5. liquid collecting cylinder; 6. solenoid valve; 7. reflux pipe. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] like Figure 1-Figure 2 As shown, a high-temperature smoke dust separation device for an electric arc furnace in this embodiment includes a separation tank 1, in which a dust removal component 2 is arranged, and the dust removal component 2 includes an injection pipe 201 welded to the top of one side wall of the separation tank 1, a spray pipe 202 vertically connected to one end of the injection pipe 201, and atomizing nozzles 203 distributed in a circular array on the outer wall of the spray pipe 202. In the process of dust removal from the flue gas, the medicine liquid is sprayed out through the injection pipe 201 and the atomizing nozzle 203 on the spray pipe 202 to contact with the flue gas, and can react with tiny particles in the flue gas, thereby removing dust from the flue gas. In addition, since the spraying direction of the medicine liquid is perpendicular to the flow direction of the flue gas, the medicine liquid can change the flow direction of the flue gas, thereby increasing the contact time between the medicine liquid and the flue gas, and the smoke dust separation effect is good.

[0032] like Figure 1-Figure 2 As shown, in this embodiment, the injection pipe 201 is welded to the spray pipe 202, the atomizing nozzle 203 is installed on the outer wall of the spray pipe 202 by means of threads, the spray pipe 202 is arranged along the central axis of the separation tank 1, and the dust removal component 2 also includes a gas distribution plate 204 obliquely arranged at the bottom of the separation tank 1, and the surface of the gas distribution plate 204 is covered with micropores. The gas distribution plate 204 can evenly distribute the flue gas in the separation tank 1, and the dust removal component 2 also includes a demister 205 fixed on the top of the separation tank 1, and the demister 205 contains hygroscopic material, and the demister 205 can dehumidify the flue gas after dust removal.

[0033] like Figure 1-Figure 2 As shown, in this embodiment, a liquid collecting cylinder 5 is welded to the bottom end of the separation tank 1, and the liquid collecting cylinder 5 is connected to the separation tank 1. The reacted medicine liquid falls into the liquid collecting cylinder 5 for collection. A reflux pipe 7 is led out from one side wall of the liquid collecting cylinder 5, and an electromagnetic valve 6 is installed on the reflux pipe 7 through a thread. The medicine liquid in the liquid collecting cylinder 5 can also settle naturally, that is, the particles in the smoke and dust settle in the liquid collecting cylinder 5 at the bottom, and the settled medicine liquid is reused through the reflux pipe 7. The electromagnetic valve 6 controls the on-off of the reflux pipe 7. An air inlet pipe 4 is led out from one side wall of the bottom end of the separation tank 1, and a connecting flange is reserved at one end of the air inlet pipe 4. The cooled flue gas enters the separation tank 1 through the air inlet pipe 4, and an exhaust pipe 3 is led out from the top of the separation tank 1. The dehumidified and dust-removed flue gas is discharged through the exhaust pipe 3.

[0034] The specific implementation process of this embodiment is as follows: when in use, the flue gas after cooling enters the separation tank 1 through the air inlet pipe 4. At this time, the gas distribution plate 204 evenly distributes it in the separation tank 1 so that it flows upward. During the flow process, the liquid medicine is sprayed out through the injection pipe 201 and the atomizing nozzle 203 on the spray pipe 202 to contact the flue gas, and can react with the tiny particles in the flue gas, thereby removing dust from the flue gas. Since the spraying direction of the liquid medicine is perpendicular to the flow direction of the flue gas, the liquid medicine can change the flow direction of the flue gas, increase the contact time between the liquid medicine and the flue gas, and achieve good smoke and dust separation effect. Then the demister 205 dehumidifies the flue gas after dust removal, and the dehumidified and dusted flue gas is discharged through the exhaust pipe 3. At the same time, the reacted liquid medicine falls into the liquid collecting barrel 5 for collection. The liquid medicine in the liquid collecting barrel 5 can also be naturally settled, that is, the particles in the smoke are settled in the liquid collecting barrel 5 at the bottom, and the settled liquid medicine is reused through the reflux pipe 7. The solenoid valve 6 controls the on and off of the reflux pipe 7.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-temperature smoke and dust separation device for a submerged arc furnace, characterized in that: The invention comprises a separation tank (1), wherein a dust removal assembly (2) is arranged in the separation tank (1), and the dust removal assembly (2) comprises a liquid injection pipe (201) welded to the top end of a side wall of the separation tank (1), a spray pipe (202) vertically connected to one end of the liquid injection pipe (201), and atomizing nozzles (203) distributed in a circular array on the outer side wall of the spray pipe (202).

2. The high-temperature smoke separation device for a submerged arc furnace according to claim 1, characterized in that: The injection pipe (201) is welded to the spray pipe (202), the atomizing nozzle (203) is installed on the outer wall of the spray pipe (202) by means of threads, and the spray pipe (202) is arranged along the central axis of the separation tank (1).

3. The high-temperature smoke separation device for a submerged arc furnace according to claim 1, characterized in that: The dust removal assembly (2) further comprises a gas distribution plate (204) obliquely arranged at the bottom of the separation tank (1), and the surface of the gas distribution plate (204) is covered with micropores.

4. The high-temperature smoke separation device for a submerged arc furnace according to claim 1, characterized in that: The dust removal assembly (2) further comprises a demister (205) fixed to the top of the separation tank (1), wherein the demister (205) contains a hygroscopic material.

5. The high-temperature smoke separation device for a submerged arc furnace according to claim 1, characterized in that: A liquid collecting cylinder (5) is welded to the bottom end of the separation tank (1), and the liquid collecting cylinder (5) is in communication with the interior of the separation tank (1).

6. The high-temperature smoke separation device for a submerged arc furnace according to claim 5, characterized in that: A reflux pipe (7) is led out from a side wall of the liquid collecting cylinder (5), and a solenoid valve (6) is installed on the reflux pipe (7) via a thread.

7. The high-temperature smoke and dust separation device for a submerged arc furnace according to claim 5, characterized in that: An air inlet pipe (4) is led out from a side wall of the bottom end of the separation tank (1), and a connection flange is reserved at one end of the air inlet pipe (4).

8. The high-temperature smoke separation device for a submerged arc furnace according to claim 6, characterized in that: An exhaust pipe (3) is led out from the top end of the separation tank (1).

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