Device capable of reducing CO content of hot rolling heating furnace

Abstract

The utility model discloses a device capable of reducing the CO content of a hot rolling heating furnace, which relates to the technical field of heating furnaces and comprises a heating furnace body and an air inlet box, a second smoke exhaust pipe, an air inlet pipe and an air supply pipe are fixedly communicated on the air inlet box, the air supply pipe is communicated with the heating furnace body, and an air mixing component for mixing smoke and fresh air is arranged in the air inlet box. According to the novel energy-saving and environment-friendly boiler, the design structure is reasonable, flue gas is divided into qualified flue gas and unqualified flue gas through the piston assembly and conveyed into the first flue gas exhaust pipe and the second flue gas exhaust pipe respectively, then the flue gas and fresh air are efficiently mixed and preheated through the air mixing assembly, the combustion efficiency is optimized, and the combustion efficiency is improved. And qualified smoke in the first smoke exhaust pipe can preheat fresh air through the reheating pipe, so that the problem that the temperature of the furnace body is reduced due to the fact that the fresh air is directly added is effectively avoided, the temperature balance in the heating furnace body is guaranteed, and the heating efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, in particular to a device capable of reducing the CO content of a hot rolling heating furnace. Background Art

[0002] Regenerative heating furnace is a heating equipment widely used in the metallurgical industry. During the metallurgical production process, one of the main components of the exhaust gas emitted by the heating furnace is carbon monoxide (CO). The large amount of CO emission not only causes energy waste, but also has adverse effects on the atmospheric environment. Therefore, it is of great significance to reduce the CO emission of the heating furnace.

[0003] A Chinese patent with announcement number CN210921399U discloses a heating furnace exhaust system that can reduce CO emissions. It sends the gas in the pipeline into the heating furnace through the backblowing of the flue gas, preventing the gas from being discharged into the atmosphere with the flue gas after reversing, thereby reducing the pollution caused by the gas to the environment and avoiding energy waste.

[0004] Although the above device uses multiple fans and valves to send the coal gas back into the heating furnace for re-combustion to reduce the CO content in the coal gas, fresh air still needs to be sent into the heating furnace when the coal gas is sent back into the heating furnace. The direct addition of fresh air will cause the furnace body temperature to drop, and the internal heat in the coal gas and exhaust gas directly transported into the heating furnace is not well utilized. To this end, we provide a device that can reduce the CO content of the hot rolling heating furnace to solve the above problems. Utility Model Content

[0005] 1) Technical issues solved

[0006] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a device that can reduce the CO content in a hot rolling heating furnace.

[0007] 2) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for reducing the CO content of a hot rolling heating furnace, comprising a heating furnace body and an air intake box, the air intake box is fixedly connected with a second smoke exhaust pipe, an air intake pipe and an air supply pipe, the air supply pipe is connected to the heating furnace body, the air intake box is provided with a mixing air component for mixing flue gas and fresh air, the second smoke exhaust pipe is fixedly connected with a diverter box, the diverter box is provided with an exhaust component for discharging the smoke in the heating furnace body into the diverter box, the diverter box is fixedly connected with a first smoke exhaust pipe, the first smoke exhaust pipe is fixedly connected with a reheat pipe, and the middle section of the reheat pipe is located in the air intake box, and the diverter box is provided with a piston assembly for gas diversion.

[0009] Furthermore, the air mixing component includes a motor installed on the air intake box, the output shaft of the motor passes through the air intake box and is fixedly connected to a stirring rod, and blades are installed on the stirring rod.

[0010] Furthermore, one end of the reheat pipe away from the first smoke exhaust pipe passes through the air intake box and extends to the outside of the air intake box, and a one-way valve is installed on the second smoke exhaust pipe.

[0011] Furthermore, the exhaust assembly includes an exhaust fan, a first smoke pipe is installed at the input end of the exhaust fan, and the first smoke pipe is fixedly connected to the heating furnace body, and a second smoke pipe is fixedly connected to the output end of the exhaust fan, and the second smoke pipe is fixedly connected to the diversion box.

[0012] Furthermore, the piston assembly includes a support fixedly connected to the diversion box, an electric push rod is installed on the support, and a CO content detector is installed on the second smoke pipe.

[0013] Furthermore, a sealing sleeve is embedded in the diversion box, a sliding rod is slidably connected inside the sealing sleeve, the telescopic end of the electric push rod is fixedly connected to the sliding rod, the end of the sliding rod away from the electric push rod is fixedly connected to a piston plate, and a high-temperature resistant rubber ring is fixedly connected to the piston plate.

[0014] 3) Beneficial effects:

[0015] Compared with the prior art, the device for reducing the CO content in the hot rolling heating furnace has the following beneficial effects:

[0016] The utility model divides the flue gas into qualified and unqualified ones through the piston assembly and transports them to the first smoke exhaust pipe and the second smoke exhaust pipe respectively, and then efficiently mixes and preheats the flue gas with fresh air through the air mixing assembly, which not only optimizes the combustion efficiency and reduces the generation of carbon monoxide, but the qualified flue gas in the first smoke exhaust pipe will also preheat the fresh air through the reheat pipe, effectively avoiding the problem of furnace temperature reduction caused by directly adding fresh air, ensuring the temperature balance in the heating furnace body, and improving the heating efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the diverter box of the utility model.

[0019] In the figure: 1. heating furnace body; 2. exhaust fan; 3. first smoke pipe; 4. second smoke pipe; 5. diverter box; 6. CO content detector; 7. first smoke exhaust pipe; 8. second smoke exhaust pipe; 9. sealing sleeve; 10. sliding rod; 11. piston plate; 12. high temperature resistant rubber ring; 13. support; 14. electric push rod; 15. one-way valve; 16. reheat pipe; 17. air intake box; 18. air intake pipe; 19. air supply pipe; 20. motor; 21. stirring rod; 22. blades. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-2 As shown, the utility model provides a technical solution: a device for reducing the CO content of a hot rolling heating furnace, comprising a heating furnace body 1 and an air intake box 17, the air intake box 17 is fixedly connected with a second smoke exhaust pipe 8, an air intake pipe 18 and an air supply pipe 19, the air intake pipe 18 serves as a pipeline for air intake to the air intake box 17, a blower is provided on the air intake pipe 18 to transport air into the air intake box 17, the air supply pipe 19 is connected to the heating furnace body 1, and the air in the air intake box 17 can be transported to the inside of the heating furnace body 1 through the air supply pipe 19.

[0022] An air mixing component for mixing flue gas and fresh air is provided in the air intake box 17. The air mixing component includes a motor 20 installed on the air intake box 17. The output shaft of the motor 20 passes through the air intake box 17 and is fixedly connected to a stirring rod 21. Blades 22 are installed on the stirring rod 21. The output shaft of the motor 20 drives the blades 22 on the stirring rod 21 to rotate, which can mix the air entering the air supply pipe 19, so that the flue gas and the fresh air can be fully mixed.

[0023] The second smoke exhaust pipe 8 is fixedly connected to a diverter box 5, and the diverter box 5 is provided with an exhaust component for discharging the smoke in the heating furnace body 1 into the diverter box 5. The exhaust component includes an exhaust fan 2, and a first smoke pipe 3 is installed at the input end of the exhaust fan 2, and the first smoke pipe 3 is fixedly connected to the heating furnace body 1. The output end of the exhaust fan 2 is fixedly connected to a second smoke pipe 4, and the second smoke pipe 4 is fixedly connected to the diverter box 5. The high-temperature smoke generated in the heating furnace body 1 can be transported to the diverter box 5 through the first smoke pipe 3 and the second smoke pipe 4 by the exhaust fan 2.

[0024] The splitter box 5 is fixedly connected with a first smoke exhaust pipe 7, and the first smoke exhaust pipe 7 is fixedly connected with a reheat pipe 16, and the middle section of the reheat pipe 16 is located in the air intake box 17. The reheat pipe 16 is arranged inside the air intake box 17, and the flue gas can be used to preheat the fresh air entering the air intake box 17 from the air intake pipe 18 in the reheat pipe 16, so as to avoid reducing the efficiency of the heating furnace due to the low temperature of the fresh air. The end of the reheat pipe 16 away from the first smoke exhaust pipe 7 passes through the air intake box 17 and extends to the outside of the air intake box 17. A one-way valve 15 is installed on the second smoke exhaust pipe 8. The gas flowing in the reheat pipe 16 is a gas with a qualified CO content. The one-way valve 15 can prevent the gas from entering the splitter box 5 from the air intake box 17.

[0025] A piston assembly for gas diversion is arranged in the diversion box 5, and the piston assembly includes a support 13 fixedly connected to the diversion box 5, and an electric push rod 14 is installed on the support 13. A CO content detector 6 is installed on the second smoke pipe 4. The CO content detector 6 can detect the CO content in the gas entering the diversion box 5 from the second smoke pipe 4.

[0026] The shunt box 5 is inlaid with a sealing sleeve 9, and a slide rod 10 is slidably connected inside the sealing sleeve 9. The telescopic end of the electric push rod 14 is fixedly connected to the slide rod 10, and the end of the slide rod 10 away from the electric push rod 14 is fixedly connected to a piston plate 11, and a high-temperature resistant rubber ring 12 is fixedly connected to the piston plate 11. The telescopic end of the electric push rod 14 can drive the slide rod 10 to move up and down, and after the slide rod 10 drives the piston plate 11 and the high-temperature resistant rubber ring 12 to move upward, the flue gas with high CO content can be discharged from the shunt box 5 through the second smoke exhaust pipe 8, and the slide rod 10 drives the piston plate 11 and the high-temperature resistant rubber ring 12 to move downward, and the qualified flue gas is discharged through the first smoke exhaust pipe 7.

[0027] It should be noted that, in this article, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected", and "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

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

Claims

1. A device for reducing the CO content in a hot rolling heating furnace, comprising a heating furnace body (1) and an air inlet box (17), characterized in that: The air intake box (17) is fixedly connected to a second smoke exhaust pipe (8), an air intake pipe (18) and an air supply pipe (19); the air supply pipe (19) is connected to the heating furnace body (1); an air mixing component for mixing smoke and fresh air is arranged in the air intake box (17); the second smoke exhaust pipe (8) is fixedly connected to a diverter box (5); the diverter box (5) is provided with an exhaust component for discharging smoke in the heating furnace body (1) into the diverter box (5); the diverter box (5) is fixedly connected to a first smoke exhaust pipe (7); the first smoke exhaust pipe (7) is fixedly connected to a reheat pipe (16), and the middle section of the reheat pipe (16) is located in the air intake box (17); and a piston component for gas diversion is arranged in the diverter box (5).

2. The device for reducing the CO content in a hot rolling heating furnace according to claim 1, characterized in that: The air mixing assembly comprises a motor (20) mounted on an air intake box (17); an output shaft of the motor (20) passes through the air intake box (17) and is fixedly connected to a stirring rod (21); and a blade (22) is mounted on the stirring rod (21).

3. The device for reducing CO content in a hot rolling heating furnace according to claim 1, characterized in that: One end of the reheat pipe (16) away from the first smoke exhaust pipe (7) passes through the air intake box (17) and extends to the outside of the air intake box (17), and a one-way valve (15) is installed on the second smoke exhaust pipe (8).

4. The device for reducing the CO content in a hot rolling heating furnace according to claim 1, characterized in that: The exhaust assembly comprises an exhaust fan (2), the input end of the exhaust fan (2) is equipped with a first smoke pipe (3), and the first smoke pipe (3) is fixedly connected to the heating furnace body (1), and the output end of the exhaust fan (2) is fixedly connected to a second smoke pipe (4), and the second smoke pipe (4) is fixedly connected to the diversion box (5).

5. The device for reducing the CO content in a hot rolling heating furnace according to claim 4, characterized in that: The piston assembly comprises a support (13) fixedly connected to the diversion box (5), an electric push rod (14) is installed on the support (13), and a CO content detector (6) is installed on the second smoke pipe (4).

6. The device for reducing the CO content in a hot rolling heating furnace according to claim 5, characterized in that: The diverter box (5) is inlaid with a sealing sleeve (9), a sliding rod (10) is slidably connected inside the sealing sleeve (9), the telescopic end of the electric push rod (14) is fixedly connected to the sliding rod (10), and one end of the sliding rod (10) away from the electric push rod (14) is fixedly connected to a piston plate (11), and a high-temperature resistant rubber ring (12) is fixedly connected to the piston plate (11).

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