Hydrogen metallurgical reaction furnace

Abstract

This utility model relates to a hydrogen metallurgical reactor, including a furnace body and a hydrogen supply system. The furnace body consists of an upper reduction section and a lower cooling section. The upper end of the reduction section is provided with a feed inlet and an exhaust outlet, and the lower end of the cooling section is provided with a discharge outlet. The hydrogen supply system is located at the lower end of the reduction section and includes a driving component and a hydrogen injection component. The hydrogen injection component consists of an outer pipe, a pulverized coal pipe, and a hydrogen-rich gas pipe. The outer pipe is connected to the movable end of the driving component. The pulverized coal pipe is coaxially arranged inside the outer pipe. The outlet end of the pulverized coal pipe is located in the middle part of the outer pipe, and the inlet end is connected to the pulverized coal source. One end of the outer pipe is sealed to the inlet end of the pulverized coal pipe. This utility model delivers hydrogen-rich gas into the central part of the furnace by setting the driving component around the furnace body and driving the hydrogen injection component to extend into the furnace. In addition, after the hydrogen supply is completed, the hydrogen injection component can be withdrawn from the furnace, reducing the corrosion of hot air and improving its service life.

Description

Technical Field

[0001] This utility model relates to hydrogen metallurgical reactors, and more particularly to a hydrogen metallurgical reactor. Background Technology

[0002] In the ironmaking process, to reduce the coke-to-iron ratio, pulverized coal or gaseous fuels are typically injected to replace some of the coke. In recent years, with increasingly stringent environmental regulations, the use of hydrogen-rich gaseous fuels for injection has gained growing attention. Hydrogen-rich gaseous fuels not only provide heat and reducing agents for blast furnace smelting but also improve the reduction process of the furnace charge, promote the development of indirect reduction, reduce the degree of direct reduction, and thus reduce CO2 emissions and fuel consumption in blast furnace smelting.

[0003] Currently, the most common method for injecting hydrogen-rich gas is to use multiple nozzles around the furnace body to inject hydrogen-rich gas into the furnace. However, after the hydrogen-rich gas enters the vertical furnace, it is difficult to reach the center of the furnace body, resulting in a very uneven metallization rate of the metallized furnace charge. In addition, the front end of the traditional gas nozzle is in continuous contact with hot air, which is prone to deformation, thus affecting the service life of the nozzle. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned background technology, the present invention provides a hydrogen metallurgical reactor that can make hydrogen-rich gas reach the center of the furnace body, improve the metallization rate of the metallized furnace charge, and extend the service life of the hydrogen-rich gas nozzle.

[0005] A hydrogen metallurgical reactor includes a furnace body and a hydrogen supply system. The furnace body consists of an upper reduction section and a lower cooling section. The upper end of the reduction section is provided with a feed inlet and an exhaust outlet, and the lower end of the cooling section is provided with a discharge outlet. The hydrogen supply system is located at the lower end of the reduction section and includes a drive component and a hydrogen injection component. The hydrogen injection component consists of an outer pipe, a pulverized coal pipe, and a hydrogen-rich gas pipe. The outer pipe is connected to the movable end of the drive component. The pulverized coal pipe is coaxially arranged inside the outer pipe. The outlet end of the pulverized coal pipe is located in the middle part of the outer pipe, and the inlet end is connected to a pulverized coal source. One end of the outer pipe is sealed to the inlet end of the pulverized coal pipe, and the other end of the outer pipe is a mixed gas injection end. The hydrogen-rich gas pipe is connected to the end of the outer pipe near the inlet end of the pulverized coal pipe. A vent is provided on the furnace wall of the reduction section to allow the mixed gas injection end of the outer pipe to extend into the furnace. A one-way flip-up cover is provided at the vent.

[0006] Optionally, the length of the pulverized coal pipe located inside the outer pipe is between one-half and two-thirds of the overall length of the outer pipe.

[0007] Optionally, a ring channel is formed between the pulverized coal pipe and the outer pipe, and multiple through holes are provided on the side wall of the outer pipe in the ring channel section.

[0008] Optionally, multiple vents and hydrogen supply systems are provided circumferentially along the lower end of the reduction section.

[0009] Optionally, check valves are installed on the pulverized coal pipe and the hydrogen-rich gas pipe respectively.

[0010] Optionally, the one-way flip cover includes a frame with a transverse hole communicating with a vent. One side of the frame is hinged to a cover body via a pin. A torsion spring is provided on the pin, with one end of the torsion spring fixed to the pin and the other end fixed to the cover body. The torsion spring acts on the pin, keeping the transverse hole in a normally closed state.

[0011] The beneficial effects of this utility model are: by setting a driving component around the furnace body and driving the hydrogen injection component to extend into the furnace, the hydrogen-rich gas is sent into the central part of the furnace. In addition, after the hydrogen supply is completed, the hydrogen injection component can be withdrawn from the furnace, reducing the corrosion of hot air and improving service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the furnace body and hydrogen supply system of this utility model, wherein the furnace body is a longitudinal section.

[0013] Figure 2 This is a schematic diagram of the hydrogen supply system and vent of this utility model.

[0014] Figure 3 This is an exploded view of the one-way flip cover of this utility model.

[0015] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the structure of the outer tube of this utility model with a through hole.

[0017] Explanation of reference numerals in the attached drawings: 1: Furnace body, 11: Reduction section, 12: Cooling section, 13: Feed inlet, 14: Exhaust port, 15: Discharge port, 2: Drive component, 3: Hydrogen injection component, 31: Outer pipe, 311: Mixed gas injection end, 312: Through hole, 32: Pulverized coal pipe, 33: Hydrogen-rich gas pipe, 4: Vent nozzle, 5: One-way flip cover plate, 51: Frame, 52: Horizontal hole, 53: Pin, 54: Cover plate body, 55: Torsion spring, 6: Ring track, 7: Check valve. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The implementation of this utility model will be described below with reference to the accompanying drawings.

[0019] like Figure 1 The hydrogen metallurgical reactor shown includes a furnace body 1 and a hydrogen supply system. The furnace body 1 consists of a reduction section 11 located at the top and a cooling section 12 located at the bottom. A feed inlet 13 and an exhaust outlet 14 are provided at the upper end of the reduction section 11, and a discharge outlet 15 is provided at the lower end of the cooling section 12. A hydrogen supply system for providing reducing gas is also provided at the lower end of the reduction section 11. The furnace charge enters the furnace body 1 through the feed inlet 13 and undergoes a reduction reaction with the introduced hydrogen-rich gas in the reduction section 11. The gas after the reaction is discharged from the exhaust outlet 14, and the furnace charge after the reaction is discharged from the discharge outlet 15.

[0020] refer to Figure 2 The hydrogen supply system specifically includes a drive component 2 and a hydrogen injection component 3. In this embodiment, the drive component 2 uses a lead screw linear module. The hydrogen injection component 3 consists of an outer pipe 31, a pulverized coal pipe 32, and a hydrogen-rich gas pipe 33. The outer pipe 31 is connected to the movable end (slide table of the lead screw linear module) of the drive component 2. The pulverized coal pipe 32 is coaxially arranged inside the outer pipe 31. The pulverized coal pipe 32 has an inlet end and an outlet end. Its inlet end is connected to the pulverized coal source. One end of the outer pipe 31 is sealed to the inlet end of the pulverized coal pipe 32 by welding. The other end of the outer pipe 31 is a mixed gas injection end 311. The outlet end of the pulverized coal pipe 32 is located in the middle part of the outer pipe 31. Specifically, the outlet end of the pulverized coal pipe 32 is located at one-half to two-thirds of the length of the outer pipe 31. In addition, the hydrogen-rich gas pipe 33 is connected to one end of the outer pipe 31 near the inlet end of the pulverized coal pipe 32, and check valves 7 are respectively installed on the pulverized coal pipe 32 and the hydrogen-rich gas pipe 33; the hydrogen-rich gas and pulverized coal are jointly ejected from the outer pipe 31 at the mixed gas injection end 311.

[0021] Correspondingly, a vent 4 is provided on the furnace wall of the reduction section 11, which allows the mixed gas injection end 311 of the outer tube 31 to extend into the furnace. A one-way flip cover 5 is provided at the vent 4, which is used to close or open the vent 4.

[0022] refer to Figure 3The one-way flip cover 5 includes a frame 51, with the drive component 2 fixed to the frame 51 by bolts. The frame 51 has a transverse hole 52 communicating with the vent 4. A cover body 54 is hinged to one side of the frame 51 via a pin 53. A torsion spring 55 is mounted on the pin 53, with one end fixed to the pin 53 and the other end fixed to the cover body 54. The torsion spring 55 acts on the pin 53, keeping the transverse hole 52 normally closed. Pushing the cover body 54 causes it to flip along the pin 53, opening the vent 4.

[0023] like Figure 4 As shown, in a preferred embodiment, multiple vent nozzles 4 and hydrogen supply systems are arranged circumferentially along the lower end of the reduction section 11; specifically, four vent nozzles 4 and four hydrogen supply systems are arranged, and they are evenly distributed circumferentially along the lower end of the reduction section 11.

[0024] In another preferred embodiment, the length of the pulverized coal pipe 32 within the outer pipe 31 is between one-half and two-thirds of the overall length of the outer pipe 31, specifically two-thirds of its length. An annular channel 6 is formed between the pulverized coal pipe 32 and the outer pipe 31 for the flow of hydrogen-rich gas. Multiple through holes 312 are provided on the sidewall of the outer pipe 31 within the annular channel 6. (See reference for details.) Figure 2 and Figure 5 As the hydrogen-rich gas flows along the annular channel 6, it is ejected from the through-hole 312, resulting in a more uniform distribution of the hydrogen-rich gas within the furnace body. This is beneficial for improving the metallization rate of the furnace charge.

[0025] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A hydrogen metallurgical reactor, comprising a furnace body (1) and a hydrogen supply system, wherein the furnace body (1) consists of an upper reduction section (11) and a lower cooling section (12), wherein the upper end of the reduction section (11) is provided with a feed inlet (13) and an exhaust outlet (14), and the lower end of the cooling section (12) is provided with a discharge outlet (15), characterized in that, The hydrogen supply system is located at the lower end of the reduction section (11), and includes a drive component (2) and a hydrogen injection component (3). The hydrogen injection component (3) consists of an outer pipe (31), a pulverized coal pipe (32), and a hydrogen-rich pipe (33). The outer pipe (31) is connected to the movable end of the drive component (2), and the pulverized coal pipe (32) is coaxially arranged inside the outer pipe (31). The outlet end of the pulverized coal pipe (32) is located in the middle part of the outer pipe (31), and the inlet end is connected to the pulverized coal source. One end of the outer pipe (31) is sealed to the inlet end of the pulverized coal pipe (32). The other end of the outer pipe (31) is a mixed gas injection end (311), and the hydrogen-rich pipe (33) is connected to the end of the outer pipe (31) near the inlet end of the pulverized coal pipe (32). The furnace wall of the reduction section (11) is provided with a vent (4) that allows the mixed gas injection end (311) of the outer tube (31) to extend into the furnace. A one-way flip cover (5) is provided at the vent (4).

2. The hydrogen metallurgical reactor according to claim 1, characterized in that, The length of the pulverized coal pipe (32) inside the outer pipe (31) is between one-half and two-thirds of the overall length of the outer pipe (31).

3. The hydrogen metallurgical reactor according to claim 2, characterized in that, A ring channel (6) is formed between the pulverized coal pipe (32) and the outer pipe (31), and multiple through holes (312) are provided on the side wall of the outer pipe (31) located in the ring channel (6).

4. The hydrogen metallurgical reactor according to claim 3, characterized in that, Check valves (7) are respectively installed on the pulverized coal pipe (32) and the hydrogen-rich gas pipe (33).

5. The hydrogen metallurgical reactor according to claim 1, characterized in that, The vent (4) and hydrogen supply system are provided in multiple circumferential directions at the lower end of the reduction section (11).

6. The hydrogen metallurgical reactor according to claim 1, characterized in that, The one-way flip cover (5) includes a frame (51), on which a transverse hole (52) communicating with the vent (4) is provided. One side of the frame (51) is hinged to the cover body (54) by a pin (53). A torsion spring (55) is provided on the pin (53). One end of the torsion spring (55) is fixed on the pin (53), and the other end is fixed on the cover body (54). The torsion spring (55) acts on the pin (53) to keep the transverse hole (52) in a normally closed state.

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