Energy-saving device for smelting furnace

Abstract

The utility model relates to an energy-saving device for a smelting furnace. The device comprises a heat exchange bin, a baffle, a waste heat recovery pipe, an exhaust fan and an air return pipe, the heat exchange bin is of a funnel-shaped structure, one side of the heat exchange bin is connected with a smelting furnace through an air inlet pipe, the other side of the heat exchange bin is connected with a bag-type dust collector through an exhaust pipe, the waste heat recovery pipe is further fixedly installed in the heat exchange bin, and one end of the waste heat recovery pipe is communicated with the external environment and used for absorbing air; an air outlet of the exhaust fan is connected with the smelting furnace through an air return pipe, and the bottom of the heat exchange bin is further connected with a baffle in a sliding mode. According to the scheme, air can be preheated through high-temperature flue gas of the smelting furnace and then guided into the burner, extra heat is provided for the combustion process, and therefore the combustion efficiency is improved, and the temperature in the furnace is increased.

Description

Technical Field

[0001] This application relates to the technical field of mineral smelting, and particularly to an energy-saving device for a smelting furnace. Background Art

[0002] A burner, also known as a combustor, is a device on a smelting furnace used to achieve the fuel combustion process. Its main function is to send fuel and air into the furnace for combustion according to a certain ratio and mixing conditions, and meet the requirements of the flame for the heating process in the furnace. During the smelting process, air needs to be continuously supplied to the burner to ensure the normal progress of the combustion process.

[0003] The traditional method is to directly introduce ambient normal-temperature air into the burner. Since the temperature of the air in the environment is relatively low, it cannot provide additional heat energy to assist fuel combustion, easily resulting in the combustion temperature being lower than the ideal level, thereby affecting the complete combustion of fuel and thermal efficiency. This problem is more prominent in colder winter climates. Utility Model Content

[0004] To solve or partially solve the problems existing in the related technologies, this application provides an energy-saving device for a smelting furnace. This device can first preheat the air using the high-temperature flue gas of the smelting furnace and then introduce it into the burner, providing additional heat for the combustion process, thereby improving the combustion efficiency and the temperature in the furnace.

[0005] This application provides an energy-saving device for a smelting furnace, including a heat exchange chamber, a baffle, a waste heat recovery pipe, a suction fan, and a return pipe. The heat exchange chamber has a funnel-shaped structure. One side is connected to the smelting furnace through an intake pipe, and the other side is connected to a bag filter through an exhaust pipe. A waste heat recovery pipe is also fixedly installed in the heat exchange chamber. One end of the waste heat recovery pipe communicates with the external environment for absorbing air, and the other end is connected to the intake port of the suction fan. The outlet of the suction fan is connected to the burner of the smelting furnace through a return pipe. A baffle is also slidably connected to the bottom of the heat exchange chamber.

[0006] Optionally, in some embodiments, the waste heat recovery pipe has a corrugated structure.

[0007] Optionally, in some embodiments, an air cannon corresponding to the waste heat recovery pipe is installed on the side wall of the heat exchange chamber for cleaning the soot attached to the surface of the waste heat recovery pipe.

[0008] Optionally, in some embodiments, a vibration motor is installed on the side wall of the heat exchange chamber.

[0009] Optionally, in some embodiments, the heat exchange chamber and the baffle are connected through a movable buckle.

[0010] The technical solution provided by this application may include the following beneficial effects:

[0011] In this application, the high-temperature flue gas generated by the smelting furnace can be recycled through the heat exchange chamber. The waste heat is used to preheat the air, and then the preheated air is introduced into the burner to provide additional heat for the combustion process, thereby improving the combustion efficiency and the temperature in the furnace, achieving the purpose of energy conservation. Moreover, the temperature on the surface of the waste heat recovery pipe can be cleaned by the air cannon in cooperation with the vibration motor to ensure the heat exchange efficiency.

[0012] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0013] By describing the exemplary embodiments of this application in more detail in combination with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.

[0014] Figure 1 is a three-dimensional schematic diagram of the overall structure of this application;

[0015] Figure 2 is a schematic diagram of the working process of this application;

[0016] Figure 3 is a front sectional view of a partial structure of this application.

[0017] Reference Numerals:

[0018] 1 - Smelting furnace, 11 - Burner, 2 - Heat exchange chamber, 21 - Intake pipe, 22 - Exhaust pipe, 23 - Support, 24 - Baffle, 25 - Movable lock, 3 - Bag filter, 4 - Chimney, 5 - Waste heat recovery pipe, 51 - Suction end, 52 - Connection end, 6 - Exhaust fan, 7 - Return pipe, 8 - Air cannon, 81 - Solenoid valve, 82 - Compressed air pipe, 9 - Vibration motor. Detailed Embodiments

[0019] The embodiments of this application will be described in more detail below with reference to the drawings. Although the embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0020] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0021] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application 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 thus should not be construed as a limitation of this application.

[0022] Unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] See Figure 1, An energy-saving device for a smelting furnace, comprising a heat exchange chamber 2, a baffle 24, a waste heat recovery pipe 5, a suction fan 6, and a return air pipe 7. The heat exchange chamber 2 is of a funnel-shaped structure. One side thereof is connected to the smelting furnace 1 through an intake pipe 21, and the other side is connected to a bag filter 3 through an exhaust pipe 22. A waste heat recovery pipe 5 is fixedly installed in the heat exchange chamber 2. The waste heat recovery pipe 5 is of a corrugated structure, thereby increasing the contact area with the high-temperature flue gas and improving the heat exchange effect. The two ends of the waste heat recovery pipe 5 are respectively an air intake end 51 and a connection end 52. The air intake end 51 passes through the side wall of the heat exchange chamber 2 and is connected to the external environment for sucking air, and the connection end 52 passes through the side wall of the heat exchange chamber 2 and is connected to the intake port of the suction fan 6. The outlet of the suction fan 6 is connected to the burner 11 of the smelting furnace 1 through a return air pipe 7. During use, the high-temperature flue gas in the smelting furnace 1 enters the heat exchange chamber 2 through the intake pipe 21 and heats the waste heat recovery pipe 5. The suction fan 6 is started, and normal-temperature air in the external environment is continuously sucked through the suction fan 6. The normal-temperature air is heated after entering the waste heat recovery pipe 5, and the heated air is introduced into the burner 11 through the return air pipe 7 to be mixed with the fuel, providing additional heat for the combustion process, thereby improving the combustion efficiency and the temperature in the furnace and achieving the purpose of energy saving.

[0024] Furthermore, since there is a lot of dust in the high-temperature flue gas of the smelting furnace, after long-term use, some dust will adhere to the surface of the waste heat recovery pipe 5, reducing the heating effect of the high-temperature flue gas on the waste heat recovery pipe 5 and thus reducing the preheating effect on the air. Therefore, it is necessary to regularly clean the dust in the heat exchange chamber 2. To facilitate the collection of the cleaned dust, a baffle 24 is slidably connected to the heat exchange chamber 2. The baffle 24 is connected to the heat exchange chamber 2 through a movable lock 25. During normal production, the baffle 24 is fixed to the bottom of the heat exchange chamber 2 through the movable lock 25; when it is necessary to collect and process the dust, the movable lock 25 is opened, the baffle 24 is slid, and the dust falls out of the heat exchange chamber 2 under the action of gravity.

[0025] In some embodiments, a bracket 23 is fixedly installed on the side wall of the heat exchange chamber 2, and an air cannon 8 corresponding to the waste heat recovery pipe 5 is fixedly installed on the bracket 23. The air cannon 8 is connected to an air compressor through a compressed air pipe 82. Compressed air is provided to the air cannon 8 through the air compressor, and a solenoid valve 81 is provided on the nozzle of the air cannon 8. During use, when the solenoid valve 81 is opened, the compressed air in the air cannon 8 can quickly spray out from the nozzle, forming a shock wave to knock down the dust adhering to the surface of the waste heat recovery pipe 5. The fallen dust accumulates at the bottom of the heat exchange chamber 2 under the action of gravity. When the accumulated dust is relatively large, the baffle 24 is opened for unified collection and cleaning. Furthermore, to clean the dust adhering to the inner wall of the heat exchange chamber 2, a vibration motor 9 is also fixedly installed on the side wall of the heat exchange chamber 2. By cooperating the air cannon 8 with the vibration motor 9, the heat exchange chamber 2 can be dust-removed to ensure the cleanliness of the heat exchange chamber 2.

[0026] Specific working process:

[0027] The high-temperature flue gas generated in the smelting furnace 1 enters the heat exchange chamber 2 through the intake pipe 21 and heats the waste heat recovery pipe 5. The induced draft fan 6 continuously sucks external normal-temperature air into the waste heat recovery pipe 5. The normal-temperature air is heated during the process of flowing through the waste heat recovery pipe 5. The heated air is introduced into the burner 11 through the return pipe 7 to be mixed with the fuel, providing additional heat for the combustion process, thereby improving the combustion efficiency and the temperature inside the furnace, achieving the purpose of energy conservation. The flue gas after heat exchange is introduced into the bag filter 3 through the exhaust pipe 22 for dust removal, and the finally up-to-standard tail gas is discharged through the chimney 4.

[0028] After running for a period of time, the dust in the heat exchange chamber 2 is cleaned by the air cannon 8 in cooperation with the vibration motor 9 to ensure the heat exchange efficiency. When the dust accumulates to a certain amount, the baffle 24 is opened to collect and process the dust uniformly.

[0029] Finally, it should also be noted that in this article, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms including, containing or any other variant are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.

Claims

1. An energy-saving device for a smelting furnace, characterized in that: The heat exchange chamber (2) comprises a heat exchange chamber (2), a baffle (24), a waste heat recovery pipe (5), an exhaust fan (6), and a return pipe (7). The heat exchange chamber (2) is a funnel-shaped structure, one side of which is connected to a smelting furnace (1) via an air inlet pipe (21), and the other side of which is connected to a bag filter (3) via an exhaust pipe (22). A waste heat recovery pipe (5) is also fixedly installed in the heat exchange chamber (2). One end of the waste heat recovery pipe (5) is connected to the external environment for absorbing air, and the other end is connected to the air inlet of the exhaust fan (6). The air outlet of the exhaust fan (6) is connected to the burner (11) of the smelting furnace (1) via the return pipe (7). The bottom of the heat exchange chamber is also slidably connected to a baffle.

2. The energy-saving device for a smelting furnace according to claim 1, characterized in that: The waste heat recovery pipe (5) has a corrugated structure.

3. The energy-saving device for a smelting furnace according to claim 1, characterized in that: An air cannon (8) corresponding to the waste heat recovery pipe (5) is installed on the side wall of the heat exchange chamber (2) and is used to clean the smoke and dust attached to the surface of the waste heat recovery pipe (5).

4. The energy-saving device for a smelting furnace according to claim 3, characterized in that: A vibration motor (9) is installed on the side wall of the heat exchange chamber (2).

5. The energy-saving device for a smelting furnace according to claim 1, characterized in that: The heat exchange chamber (2) and the baffle (24) are connected via a movable lock (25).

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