Blast furnace heat energy recovery device

Abstract

The utility model discloses a blast furnace heat energy recovery device which comprises a furnace body, a feeding device is arranged at the top of the furnace body, a hot air device is arranged on the side face of the furnace body, a waste gas treatment barrel is arranged on one side of the furnace body, and an upper surrounding barrel surrounding the periphery of the feeding device is arranged at the top of the furnace body. The top of the upper surrounding cylinder is communicated with the waste gas treatment cylinder through an exhaust pipe, and an exhaust port leading to the upper surrounding cylinder is formed in the top of the furnace body. According to the utility model, high-temperature waste gas discharged passes through the periphery of the feeding device, the feeding device is heated, the temperature of the feeding device is increased, mineral aggregate added into the feeding device can be preheated and the temperature of the mineral aggregate is increased, and the mineral aggregate can reach the reaction temperature more quickly after being sprayed into a blast furnace, so that the ironmaking efficiency is accelerated, the utilization rate of waste gas heat energy is increased, and the production cost is reduced. And heat resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace ironmaking, in particular to a blast furnace heat energy recovery device. Background Art

[0002] The blast furnace is an important device in the metallurgical industry, mainly used for the smelting of iron ore. During the production process of the blast furnace, a large amount of high-temperature waste gas is generated, and its heat energy has the potential for recovery and utilization. Therefore, establishing a blast furnace heat energy recovery device is of great significance for improving resource utilization efficiency and reducing energy consumption. Content of the Utility Model

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a blast furnace heat energy recovery device, thereby effectively solving the deficiencies existing in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a blast furnace heat energy recovery device, including a furnace body. A feeding device is arranged at the top of the furnace body, a hot air device is arranged on the side of the furnace body, an exhaust gas treatment cylinder is arranged on one side of the furnace body. An upper surrounding cylinder surrounding the feeding device is arranged at the top of the furnace body. The top of the upper surrounding cylinder is communicated with the exhaust gas treatment cylinder through an exhaust pipe, and an exhaust port leading to the upper surrounding cylinder is arranged at the top of the furnace body.

[0005] Further, a spiral exhaust gas duct is arranged in the upper surrounding cylinder. The bottom of the exhaust gas duct is communicated with the exhaust port, and the top of the exhaust gas duct is communicated with the exhaust pipe.

[0006] Further, an air inlet pipe and an air outlet pipe communicated with the furnace body are arranged on the hot air device. A side surrounding cylinder is arranged on the outer periphery of the furnace body. The air inlet pipe is communicated at the bottom of the side surrounding cylinder, and an air inlet is arranged at the upper part of the side surrounding cylinder.

[0007] Further, the air inlet is arranged on the upper side surface of the side surrounding cylinder.

[0008] Further, a spiral air duct is arranged in the side surrounding cylinder.

[0009] The above technical solution of the utility model has the following beneficial effects: when the high-temperature waste gas is discharged from the utility model, it will pass through the outer periphery of the feeding device, heating the feeding device, increasing the temperature at the feeding device, and the ore materials added to the feeding device can be preheated first, increasing the temperature of the ore materials. After the ore materials are sprinkled into the blast furnace, they can reach the reaction temperature faster, thereby accelerating the ironmaking efficiency, improving the utilization rate of the waste gas heat energy, and saving heat resources. Description of the Drawings

[0010] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model. Detailed Embodiment

[0011] The following will give a preferred and detailed description of the implementation mode of the present utility model in conjunction with the attached drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0012] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 to the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0013] As Figure 1 shown, a blast furnace heat energy recovery device in this embodiment includes a furnace body 1. A feeding device 2 is arranged at the top of the furnace body 1. A hot air device 3 is arranged on the side of the furnace body 1. An exhaust gas treatment cylinder 4 is arranged on one side of the furnace body 1. An upper surrounding cylinder 5 surrounding the outer periphery of the feeding device 2 is arranged at the top of the furnace body 1. The top of the upper surrounding cylinder 5 is communicated with the exhaust gas treatment cylinder 4 through an exhaust pipe 6. An exhaust port 7 leading to the upper surrounding cylinder 5 is arranged at the top of the furnace body 1. The high-temperature exhaust gas generated in the blast furnace flows upward, passes through the exhaust port 7 into the upper surrounding cylinder 5, and then is discharged into the exhaust gas treatment cylinder 4 through the exhaust pipe 6 for anti-pollution treatment. During this period, the high-temperature exhaust gas passing through the upper surrounding cylinder 5 will heat the feeding device 2, increasing the temperature at the feeding device 2. Since the feeding device 2 uses a uniform spreading method to feed materials into the blast furnace, there is often ore accumulation at the feeding device 2. The ore in the feeding device 2 can be preheated first to increase the ore temperature. After the ore is sprinkled into the blast furnace, it can reach the reaction temperature faster, thereby accelerating the iron-making efficiency, improving the utilization rate of exhaust gas heat energy, and saving heat resources;

[0014] Preferably, a spiral exhaust gas duct 8 is arranged in the upper surrounding cylinder 5. The bottom of the exhaust gas duct 8 is communicated with the exhaust port 7, and the top of the exhaust gas duct 8 is communicated with the exhaust pipe 6. After the high-temperature exhaust gas enters the upper surrounding cylinder 5, it can be spirally discharged along the exhaust gas duct 8, increasing the flow path of the high-temperature exhaust gas in the upper surrounding cylinder 5, thereby increasing the heat exchange time between the high-temperature exhaust gas and the feeding device 2 and improving the heat recovery effect;

[0015] Preferably, an intake pipe 9 and an outlet pipe 10 communicating with the furnace body 1 are provided on the hot air device 3. A side enclosure cylinder 11 is provided on the outer periphery of the furnace body 1. The intake pipe 9 communicates with the bottom of the side enclosure cylinder 11. An air inlet 12 is provided at the upper part of the side enclosure cylinder 11. The side enclosure cylinder 11 surrounds the outer periphery of the furnace body 1. The heat of the furnace body 1 can heat the gas in the side enclosure cylinder 11. The intake pipe 9 of the hot air device 3 can absorb the hot air in the side enclosure cylinder 11 and then heat it and introduce it into the blast furnace, reducing the consumption of heating air, improving the recovery effect of heat energy, and reducing waste of resources;

[0016] Preferably, the air inlet 12 is provided on the upper side surface of the side enclosure cylinder 11, which can prevent dust on the upper side from directly falling into the side enclosure cylinder 11;

[0017] Preferably, a spiral air inlet duct 13 is provided in the side enclosure cylinder 11. After the air enters the side enclosure cylinder 11, it can flow along the spiral air inlet duct 13, increasing the flow path of the air in the side enclosure cylinder 11, thereby increasing the heat exchange time between the air and the furnace body 1 and improving the utilization effect of the heat of the furnace body 1.

[0018] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present invention and its practical applications, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A blast furnace heat recovery device, comprising a furnace body, a charging device is arranged on the top of the furnace body, a hot air device is arranged on the side of the furnace body, and an exhaust gas treatment cylinder is arranged on one side of the furnace body, characterized in that: The top of the furnace body is provided with an upper shroud surrounding the outer periphery of the feeding device, the top of the upper shroud is connected with the exhaust gas treatment tube through an exhaust pipe, and the top of the furnace body is provided with an exhaust port leading to the upper shroud.

2. A blast furnace heat recovery device according to claim 1, characterized in that: A spiral exhaust duct is provided in the upper enclosure, the bottom of the exhaust duct is connected to the exhaust port, and the top of the exhaust duct is connected to the exhaust pipe.

3. A blast furnace heat recovery device according to claim 1, characterized in that: The hot air device is provided with an air inlet pipe and an air outlet pipe connected to the furnace body, the outer periphery of the furnace body is provided with a side enclosure tube, the air inlet pipe is connected to the bottom of the side enclosure tube, and the upper part of the side enclosure tube is provided with an air inlet.

4. A blast furnace heat recovery device according to claim 3, characterized in that: The air inlet is arranged on the upper end side of the side enclosure tube.

5. A blast furnace heat recovery device according to claim 3, characterized in that: A spiral air inlet duct is arranged in the side enclosure tube.

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