Blast furnace gas low-carbon smelting device

Abstract

The utility model relates to the technical field of smelting devices, in particular to a blast furnace gas low-carbon smelting device. According to the technical scheme, the boiler comprises a boiler body and a purification box, the purification box is arranged at the upper end of the boiler body, a heat exchange plate is arranged in the boiler body, a waste gas pipe is arranged at one end of the boiler body, a filter screen is arranged in the boiler body, an air pump is arranged at the rear end of the boiler body, and a cleaning pipe located in the lower end of the boiler body is arranged at the output end of the air pump. An air supply pipe is arranged at the rear end of the boiler, one end of the air supply pipe penetrates through the interior of the purification box, a first steam pipeline and a second steam pipeline are arranged at the two ends of the boiler respectively, a supporting net is arranged in the purification box, a flow guide frame is arranged above the supporting net, and steam openings distributed at equal intervals are formed in the lower end of the flow guide frame. Waste heat during blast furnace smelting is introduced, steam is generated through the boiler, desorption regeneration and low-carbon production are carried out on activated carbon, waste heat resources are comprehensively utilized, and resource consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting devices, in particular to a low-carbon smelting device for blast furnace gas. Background Art

[0002] The blast furnace smelting device is a device used to extract metallic iron from iron ore. After raw materials such as iron ore, coke, and limestone are fed into the blast furnace, air and coal are blown into the blast furnace to maintain the high temperature required for smelting.

[0003] A large amount of greenhouse gases such as carbon dioxide are generated in the traditional smelting process. Low-carbon smelting can significantly reduce these emissions and reduce pollutant emissions. In this process, activated carbon adsorption is used to adsorb and centrally store carbon dioxide. However, after the activated carbon is saturated, it needs to be replaced, which requires shutdown operations and causes waste of activated carbon. For this reason, we propose a low-carbon smelting device for blast furnace gas to solve the existing problems. Summary of the Utility Model

[0004] The purpose of the utility model is to propose a low-carbon smelting device for blast furnace gas aiming at the problems existing in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A low-carbon smelting device for blast furnace gas, including a boiler and a purification box. The purification box is arranged at the upper end of the boiler. A heat exchange plate is arranged inside the boiler. An exhaust pipe is arranged at one end of the boiler. A filter screen is arranged inside the boiler. An air pump is arranged at the rear end of the boiler. The output end of the air pump is provided with a cleaning pipe located inside the lower end of the boiler. A gas supply pipe is arranged at the rear end of the boiler. One end of the gas supply pipe penetrates through the inside of the purification box. Steam pipes one and two are respectively arranged at both ends of the boiler. A support net is arranged inside the purification box. A diversion frame is arranged above the support net. Equally spaced steam ports are opened at the lower end of the diversion frame.

[0006] Preferably, the heat exchange plate is wavy. The surface area of the heat exchange plate is increased, and the heat absorption effect is improved.

[0007] Preferably, a dust collection tank is connected and installed at the lower end of the boiler. A dust discharge pipe is arranged at the lower end of the dust collection tank, and a valve is arranged inside the dust discharge pipe. The filter screen intercepts the waste dust, which is collected through the dust collection tank and output through the dust discharge pipe. The valve controls the opening and closing of the dust discharge pipe.

[0008] Preferably, equally spaced blowing ports are arranged at one end of the cleaning pipe opposite to the filter screen. Four support legs are arranged at the lower end of the boiler. The support legs support the bottom of the boiler, and the high-pressure air flow conveyed by the cleaning pipe is ejected through the blowing ports.

[0009] Preferably, the steam port corresponds to the upper end of the support net, and an air outlet is arranged at the upper end of the purification box. The steam output from the steam port acts on the activated carbon above the support net at multiple points, and the air outlet conveys the purified gas.

[0010] Preferably, a flow guide plate is arranged on the inner wall of the lower end of the purification box, a sewage outlet is arranged at one end of the purification box, a valve is arranged inside the sewage outlet, the lower part of the inclined surface of the flow guide plate faces the sewage outlet, and a valve is arranged inside the second steam pipeline. The flow guide plate guides the dirt, which is output through the sewage outlet, and the opening and closing of the sewage outlet are controlled by the valve.

[0011] Preferably, a water inlet pipe is installed through one side of the upper end of the boiler, a liquid level sensor is arranged on the inner wall of the upper end of the boiler, a temperature sensor and a pressure sensor are arranged inside the boiler, and a maintenance door is arranged at the front end of the purification box. The water inlet pipe conveys water into the boiler. The liquid level sensor monitors the water level inside the boiler, the temperature sensor detects the temperature inside the boiler, and the pressure sensor detects the pressure condition inside the boiler. The maintenance door is opened when maintaining the purification box and closed at the front end of the purification box when not in use.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model introduces the waste gas of the blast furnace smelting furnace into the boiler to heat the water inside the boiler. The generated water steam can be used for power generation. The waste gas is filtered through the filter screen, and the filtered waste gas enters the purification box for carbon dioxide adsorption. At the same time, through the second steam pipeline, after the activated carbon is saturated, the high-temperature steam inside the boiler is introduced to perform desorption treatment on the saturated activated carbon, realizing low-carbon smelting processing, protecting the environment, comprehensively recycling and utilizing waste heat, improving the utilization efficiency, avoiding shutdown operations, and reducing the consumption of activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the main perspective structural schematic diagram of the present utility model;

[0015] Figure 2 is the bottom perspective structural schematic diagram of the present utility model;

[0016] Figure 3 is the main sectional perspective structural schematic diagram of the present utility model;

[0017] Figure 4 is the side sectional perspective structural schematic diagram of the boiler of the present utility model.

[0018] Reference numerals: 1, air outlet; 2, first steam pipe; 3, blowdown port; 4, water inlet pipe; 5, boiler; 6, waste gas pipe; 7, ash collecting tank; 8, ash discharge pipe; 9, support leg; 10, purification box; 11, inspection door; 12, second steam pipe; 13, heat exchange plate; 14, cleaning pipe; 15, filter screen; 16, air pump; 17, guide plate; 18, guide frame; 19, support net; 20, steam port; 21, air supply pipe; 22, injection port. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0020] As Figures 1-4 shown, a low-carbon smelting device for blast furnace gas proposed by the present invention includes a boiler 5 and a purification box 10. The purification box 10 is arranged at the upper end of the boiler 5. A heat exchange plate 13 is arranged inside the boiler 5. The heat exchange plate 13 is in a wavy shape. A waste gas pipe 6 is arranged at one end of the boiler 5. A filter screen 15 is arranged inside the boiler 5. A ash collecting tank 7 is connected and installed at the lower end of the boiler 5. A ash discharge pipe 8 is arranged at the lower end of the ash collecting tank 7, and a valve is arranged inside the ash discharge pipe 8. An air pump 16 is arranged at the rear end of the boiler 5. The output end of the air pump 16 is provided with a cleaning pipe 14 inside the lower end of the boiler 5. The cleaning pipe 14 is provided with injection ports 22 distributed at equal intervals at one end opposite to the filter screen 15. Four support legs 9 are arranged at the lower end of the boiler 5. An air supply pipe 21 is arranged at the rear end of the boiler 5. One end of the air supply pipe 21 penetrates inside the purification box 10. First steam pipe 2 and second steam pipe 12 are respectively arranged at both ends of the boiler 5.

[0021] Based on the implementation steps of Embodiment 1: When the blast furnace smelting furnace is smelting and producing, the waste gas enters the boiler 5 through the waste gas pipe 6. When passing through the filter screen 15, the dust in the waste gas is intercepted and gathers inside the ash collecting tank 7. During the process of the waste gas flowing inside the lower end of the boiler 5, the heat is heated by the heat exchange plate 13. The heat exchange plate 13 heats the water inside the upper end of the boiler 5. The water vapor is transported through the first steam pipe 2 and can be used for life production or power generation. After the filter screen 15 is used for a period of time, the air pump 16 transports high-pressure air flow into the cleaning pipe 14. The high-pressure air flow acts on the back of the filter screen 15 through the injection ports 22, and the blocked dust inside the filter screen 15 is separated, realizing automatic ash cleaning of the filter screen 15.

[0022] As Figures 1-4As shown in the figure, a low-carbon smelting device for blast furnace gas proposed by the present utility model, compared with the first embodiment, this embodiment further includes: a flow guide plate 17 is provided on the inner wall of the lower end of the purification box 10, a support net 19 is provided inside the purification box 10, a flow guide frame 18 is provided above the support net 19, and equidistantly distributed steam ports 20 are opened at the lower end of the flow guide frame 18. The steam ports 20 correspond to the upper end of the support net 19. An air outlet 1 is provided at the upper end of the purification box 10, a sewage outlet 3 is provided at one end of the purification box 10, a valve is provided inside the sewage outlet 3, the lower slope of the flow guide plate 17 faces the sewage outlet 3, a valve is provided inside the steam pipeline two 12, a water inlet pipe 4 penetrates and is installed on one side of the upper end of the boiler 5, and a liquid level sensor is provided on the inner wall of the upper end of the boiler 5, and a temperature sensor and a pressure sensor are provided inside the boiler 5. A maintenance door 11 is provided at the front end of the purification box 10.

[0023] In this embodiment, the waste gas enters the inside of the purification box 10 through the air supply pipe 21. When the waste gas rises, it contacts the activated carbon at the upper end of the support net 19. The activated carbon adsorbs the harmful substances inside the waste gas and purifies the waste gas. The carbon dioxide inside is adsorbed, realizing low-carbon production in the blast furnace smelting process. During the production process, after the adsorption capacity of the activated carbon is saturated, the valve of the steam pipeline two 12 is opened. The steam inside the boiler 5 is transported to the inside of the flow guide frame 18 through the steam pipeline two 12, and acts on the activated carbon from top to bottom through the steam ports 20 for desorption treatment of the activated carbon with high-temperature moisture. The cleaned dirt is output through the sewage outlet 3. During the blast furnace smelting process, waste heat is comprehensively utilized, and the activated carbon resources are recycled, which conforms to the concept of low-carbon environmental protection.

[0024] The above specific embodiments are only several preferred embodiments of the present utility model. Based on the technical solution of the present utility model and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0025] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A blast furnace gas low-carbon smelting device, comprising a boiler (5) and a purification box (10), characterized in that: The upper end of the boiler (5) is provided with a purification box (10), the interior of the boiler (5) is provided with a heat exchange plate (13), one end of the boiler (5) is provided with an exhaust pipe (6), the interior of the boiler (5) is provided with a filter screen (15), the rear end of the boiler (5) is provided with an air pump (16), the output end of the air pump (16) is provided with a cleaning pipe (14) located inside the lower end of the boiler (5), the rear end of the boiler (5) is provided with an air supply pipe (21), one end of the air supply pipe (21) passes through the interior of the purification box (10), the two ends of the boiler (5) are respectively provided with a steam pipe 1 (2) and a steam pipe 2 (12), the interior of the purification box (10) is provided with a support net (19), a guide frame (18) is provided above the support net (19), and the lower end of the guide frame (18) is provided with steam outlets (20) distributed at equal intervals.

2. A blast furnace gas low-carbon smelting device according to claim 1, characterized in that: The heat exchange plate (13) is wavy.

3. A blast furnace gas low-carbon smelting device according to claim 1, characterized in that: The lower end of the boiler (5) is connected to an ash collecting trough (7), and an ash discharge pipe (8) is arranged at the lower end of the ash collecting trough (7), and a valve is arranged inside the ash discharge pipe (8).

4. A blast furnace gas low-carbon smelting device according to claim 1, characterized in that: The cleaning pipe (14) is provided with equidistantly distributed blowing ports (22) at one end opposite to the filter screen (15), and the lower end of the boiler (5) is provided with four supporting legs (9).

5. The blast furnace gas low-carbon smelting device according to claim 1, characterized in that: The steam port (20) corresponds to the upper end of the support net (19), and the upper end of the purification box (10) is provided with a gas outlet (1).

6. The blast furnace gas low-carbon smelting device according to claim 1, characterized in that: A guide plate (17) is provided on the inner wall of the lower end of the purification box (10), a sewage outlet (3) is provided at one end of the purification box (10), a valve is provided inside the sewage outlet (3), the lower part of the inclined surface of the guide plate (17) faces the sewage outlet (3), and a valve is provided inside the second steam pipe (12).

7. The blast furnace gas low-carbon smelting device according to claim 1, characterized in that: A water inlet pipe (4) is installed through one side of the upper end of the boiler (5), a liquid level sensor is arranged on the inner wall of the upper end of the boiler (5), and a temperature sensor and a pressure sensor are arranged inside the boiler (5), and an inspection door (11) is arranged at the front end of the purification box (10).

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