Electric furnace steelmaking flue gas monitoring device

Abstract

The utility model relates to the technical field of steelmaking flue gas monitoring, and discloses an electric furnace steelmaking flue gas monitoring device which comprises a base, a flue gas guide pipe, a front branch pipe, a rear branch pipe, a cooling water tank and a cooling water circulator, the flue gas guide pipe is fixedly installed above the base through a support, the front branch pipe and the rear branch pipe are both fixedly communicated with the flue gas guide pipe, and the cooling water circulator is fixedly communicated with the cooling water tank. A temperature sensor is arranged on the flue gas guide pipe, a first electromagnetic valve is arranged on the side, close to the front branch pipe, of the flue gas guide pipe, a second electromagnetic valve is arranged on the side, close to the rear branch pipe, of the flue gas guide pipe, a controller is arranged on the side portion of the support, and the cooling water tank and the cooling water circulator are both fixedly installed on the base. According to the flue gas dust removal device, high-temperature flue gas can be prevented from accidentally entering the flue gas dust removal device, meanwhile, flue gas flowing does not need to be paused, and therefore the situation that flue gas treatment is interrupted is avoided, and the flue gas treatment working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking flue gas monitoring technology, and more specifically, to a monitoring device for electric furnace steelmaking flue gas. Background Technology

[0002] Electric arc furnace steelmaking mainly utilizes the heat of the electric arc. In the arc zone, the temperature reaches as high as 4000℃. The smelting process is generally divided into melting, oxidation, and reduction phases. The furnace can create both oxidizing and reducing atmospheres, resulting in high efficiency in dephosphorization and desulfurization. Currently, the flue gas from electric arc furnace steelmaking needs to be cooled by cooling equipment before entering the flue gas dust removal equipment. To further prevent high-temperature flue gas from accidentally entering the dust removal equipment and damaging the components, a flue gas monitoring device is installed between the cooling equipment and the dust removal equipment to obtain the temperature of the flue gas before it enters the dust removal equipment. If the flue gas temperature is too high, the flow of flue gas into the dust removal equipment will be stopped, leading to frequent interruptions in flue gas treatment and affecting its efficiency. Based on this, this invention designs an electric arc furnace steelmaking flue gas monitoring device to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a monitoring device for flue gas from electric arc furnace steelmaking to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A flue gas monitoring device for electric arc furnace steelmaking includes a base, a flue gas duct, a front branch pipe, a rear branch pipe, a cooling water tank, and a cooling water circulator. The flue gas duct is fixedly installed above the base by a bracket. The front and rear branch pipes are both fixedly connected to the flue gas duct. A temperature sensor is installed on the flue gas duct. A first solenoid valve is installed on the side of the flue gas duct near the front branch pipe, and a second solenoid valve is installed on the side of the flue gas duct near the rear branch pipe. A controller is installed on the side of the bracket. The cooling water tank and the cooling water circulator are both fixedly installed on the base. The front and rear branch pipes pass through the front and rear sides of the cooling water tank, respectively. A heat exchange vent pipe is fixedly connected between the front and rear branch pipes within the cooling water tank. A third solenoid valve is installed on the front branch pipe, and a fourth solenoid valve is installed on the rear branch pipe. A water inlet pipe is fixedly connected between the inlet of the cooling water circulator and the cooling water tank, and a return water pipe is fixedly connected between the outlet of the cooling water circulator and the cooling water tank.

[0006] As a preferred embodiment of this utility model, a cooling connector is provided at one end of the flue gas duct, and a dust removal connector is provided at the other end of the flue gas duct.

[0007] As a preferred embodiment of this utility model, the controller is equipped with a temperature display screen, the output terminal of the temperature sensor is electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the input terminals of the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the cooling water circulator, and the temperature display screen.

[0008] As a preferred embodiment of this utility model, a buzzer alarm is provided on the side of the bracket near the controller, and the output terminal of the controller is electrically connected to the input terminal of the buzzer alarm.

[0009] As a preferred embodiment of this invention, the heat exchange vent pipe has a serpentine cross-sectional shape.

[0010] As a preferred technical solution of this utility model, the heat exchange vent pipe is a component made of copper.

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

[0012] 1. This utility model utilizes a temperature sensor to monitor the flue gas temperature passing through the flue gas duct in real time. If the flue gas temperature exceeds a preset value, the controller closes the first and second solenoid valves and opens the third and fourth solenoid valves and the cooling water circulator. The high-temperature flue gas in the flue gas duct enters the heat exchange ventilation pipe through the front branch pipe. The cooling water circulator sends cooling water into the cooling water tank through the water pipe and returns the cooling water to the cooling water circulator through the return pipe. The high-temperature flue gas passing through the heat exchange ventilation pipe can exchange heat with the cooling water in the cooling water tank, thus cooling the high-temperature flue gas. Finally, the flue gas enters the flue gas dust removal equipment through the rear branch pipe and the flue gas duct. This prevents high-temperature flue gas from accidentally entering the flue gas dust removal equipment without interrupting the flue gas flow, thereby avoiding interruptions in flue gas treatment and improving the efficiency of flue gas treatment.

[0013] 2. This utility model, by setting up a temperature display screen and a buzzer alarm, allows the flue gas temperature information to be displayed intuitively on the temperature display screen, making it convenient for staff to check the flue gas temperature information. If the flue gas temperature exceeds the preset value, the buzzer alarm will sound to remind staff to take timely action to address the abnormal situation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a flue gas monitoring device for electric furnace steelmaking according to the present invention;

[0015] Figure 2 This is a top view schematic diagram of the electric furnace steelmaking flue gas monitoring device of this utility model;

[0016] Figure 3 This is a cross-sectional structural schematic diagram of a flue gas monitoring device for electric furnace steelmaking according to the present invention;

[0017] Figure 4 This is a schematic block diagram of the controller in an electric arc furnace steelmaking flue gas monitoring device according to the present invention.

[0018] In the diagram: 1. Base; 101. Bracket; 2. Flue gas duct; 201. Temperature sensor; 202. First solenoid valve; 203. Second solenoid valve; 204. Cooling connector; 205. Dust removal connector; 3. Front branch pipe; 301. Third solenoid valve; 4. Rear branch pipe; 401. Fourth solenoid valve; 5. Cooling water tank; 501. Water inlet pipe; 502. Water outlet pipe; 6. Cooling water circulator; 7. Heat exchange vent pipe; 8. Controller; 801. Temperature display screen; 9. Buzzer alarm. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 4 As shown, this utility model provides a flue gas monitoring device for electric arc furnace steelmaking, including a base 1, a flue gas duct 2, a front branch pipe 3, a rear branch pipe 4, a cooling water tank 5, and a cooling water circulator 6. The flue gas duct 2 is fixedly installed above the base 1 by a bracket 101. The front branch pipe 3 and the rear branch pipe 4 are both fixedly connected to the flue gas duct 2. A temperature sensor 201 is installed on the flue gas duct 2 to monitor the temperature of the flue gas passing through the flue gas duct 2 in real time. A first solenoid valve 202 is installed on the side of the flue gas duct 2 near the front branch pipe 3, and a second solenoid valve 202 is installed on the side of the flue gas duct 2 near the rear branch pipe 4. The solenoid valve 203 and the controller 8 are provided on the side of the bracket 101. The cooling water tank 5 and the cooling water circulator 6 are both fixedly installed on the base 1. The front branch pipe 3 and the rear branch pipe 4 pass through the front and rear sides of the cooling water tank 5 respectively. The heat exchange vent pipe 7 is fixedly connected between the front branch pipe 3 and the rear branch pipe 4 inside the cooling water tank 5. The front branch pipe 3 is provided with a third solenoid valve 301 and the rear branch pipe 4 is provided with a fourth solenoid valve 401. The water inlet end of the cooling water circulator 6 is fixedly connected to the cooling water tank 5 with a water pipe 501, and the water outlet end of the cooling water circulator 6 is fixedly connected to the cooling water tank 5 with a return water pipe 502.

[0021] Among them, such as Figure 1 As shown, a cooling connector 204 is provided at one end of the flue gas duct 2, and a dust removal connector 205 is provided at the other end of the flue gas duct 2, which can connect the flue gas duct 2 between the cooling equipment and the flue gas dust removal equipment.

[0022] Among them, such as Figure 1 and Figure 4 As shown, the controller 8 is equipped with a temperature display screen 801. The output terminal of the temperature sensor 201 is electrically connected to the input terminal of the controller 8. The output terminal of the controller 8 is electrically connected to the input terminals of the first solenoid valve 202, the second solenoid valve 203, the third solenoid valve 301, the fourth solenoid valve 401, the cooling water circulator 6, and the temperature display screen 801. The temperature sensor 201 transmits the flue gas temperature information to the controller 8. The controller 8 controls the temperature display screen 801 to display the flue gas temperature information, making it convenient for staff to view the flue gas temperature information.

[0023] Among them, such as Figure 1 and Figure 4 As shown, a buzzer 9 is installed on the side of the bracket 101 near the controller 8. The output terminal of the controller 8 is electrically connected to the input terminal of the buzzer 9. If the flue gas temperature exceeds the preset value, the buzzer 9 will sound to remind the staff to perform timely maintenance in case of abnormality.

[0024] Among them, such as Figure 3 As shown, the heat exchange vent pipe 7 has a serpentine cross-sectional shape, which helps to increase the heat exchange contact area between the heat exchange vent pipe 7 and the cooling water in the cooling water tank 5. The heat exchange vent pipe 7 is a component made of copper, which gives it good thermal conductivity.

[0025] The working principle of this utility model:

[0026] The flue gas duct 2 is connected between the cooling equipment and the flue gas dust removal equipment. The first solenoid valve 202 and the second solenoid valve 203 are opened, while the third solenoid valve 301, the fourth solenoid valve 401, and the cooling water circulator 6 are closed. The flue gas treated by the cooling equipment enters the flue gas dust removal equipment through the flue gas duct 2. The temperature sensor 201 monitors the temperature of the flue gas passing through the flue gas duct 2 in real time and transmits the flue gas temperature information to the controller 8. The controller 8 controls the temperature display screen 801 to display the flue gas temperature information. If the flue gas temperature exceeds the preset value, the buzzer alarm 9 sounds to remind the staff to perform timely maintenance in case of an abnormality. The controller 8 controls the first solenoid valve 202 and the second solenoid valve 203 to close. When solenoid valve 202 and second solenoid valve 203 are closed, and third solenoid valve 301, fourth solenoid valve 401 and cooling water circulator 6 are opened, the high-temperature flue gas in flue gas duct 2 enters heat exchange ventilation pipe 7 through front branch pipe 3. Cooling water circulator 6 sends cooling water into cooling water tank 5 through water pipe 501. Cooling water returns to cooling water circulator 6 through return water pipe 502. The high-temperature flue gas passing through heat exchange ventilation pipe 7 can exchange heat with the cooling water in cooling water tank 5, so that the high-temperature flue gas is cooled down. Finally, the flue gas enters the flue gas dust removal equipment through rear branch pipe 4 and flue gas duct 2. This can prevent high-temperature flue gas from accidentally entering the flue gas dust removal equipment without stopping the flue gas flow.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A monitoring device for flue gas from electric arc furnace steelmaking, characterized in that: It includes a base (1), a flue gas duct (2), a front branch pipe (3), a rear branch pipe (4), a cooling water tank (5), and a cooling water circulator (6); The flue gas duct (2) is fixedly installed above the base (1) by a bracket (101). The front branch pipe (3) and the rear branch pipe (4) are both fixedly connected to the flue gas duct (2). A temperature sensor (201) is provided on the flue gas duct (2). A first solenoid valve (202) is provided on the side of the flue gas duct (2) near the front branch pipe (3). A second solenoid valve (203) is provided on the side of the flue gas duct (2) near the rear branch pipe (4). A controller (8) is provided on the side of the bracket (101). The cooling water tank (5) and the cooling water circulator (6) are both fixedly installed on the base (1). The front branch pipe (3) and the rear branch pipe (4) pass through the front and rear sides of the cooling water tank (5) respectively. A heat exchange vent pipe (7) is fixedly connected between the front branch pipe (3) and the rear branch pipe (4) inside the cooling water tank (5). A third solenoid valve (301) is provided on the front branch pipe (3), and a fourth solenoid valve (401) is provided on the rear branch pipe (4). A water inlet pipe (501) is fixedly connected between the water inlet of the cooling water circulator (6) and the cooling water tank (5). A return water pipe (502) is fixedly connected between the water outlet of the cooling water circulator (6) and the cooling water tank (5).

2. The electric arc furnace steelmaking flue gas monitoring device according to claim 1, characterized in that: A cooling connector (204) is provided at one end of the flue gas duct (2), and a dust removal connector (205) is provided at the other end of the flue gas duct (2).

3. The electric arc furnace steelmaking flue gas monitoring device according to claim 1, characterized in that: The controller (8) is equipped with a temperature display screen (801). The output terminal of the temperature sensor (201) is electrically connected to the input terminal of the controller (8). The output terminal of the controller (8) is electrically connected to the input terminals of the first solenoid valve (202), the second solenoid valve (203), the third solenoid valve (301), the fourth solenoid valve (401), the cooling water circulator (6), and the temperature display screen (801).

4. The electric arc furnace steelmaking flue gas monitoring device according to claim 3, characterized in that: A buzzer alarm (9) is provided on the side of the bracket (101) near the controller (8), and the output terminal of the controller (8) is electrically connected to the input terminal of the buzzer alarm (9).

5. The electric arc furnace steelmaking flue gas monitoring device according to claim 1, characterized in that: The heat exchange vent pipe (7) has a serpentine cross-sectional shape.

6. The electric arc furnace steelmaking flue gas monitoring device according to claim 5, characterized in that: The heat exchange vent pipe (7) is a component made of copper.

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