Smelting furnace heat recovery device

Abstract

The utility model relates to a smelting furnace heat recovery device. The device comprises a furnace body, a collecting cover, a chimney, an air inlet pipe, an exhaust pipe, a waste heat recovery assembly and a tail gas treatment chamber, the chimney connected with the exhaust pipe is arranged at the top end of the furnace body, the collecting cover is arranged outside the furnace body and connected with the exhaust pipe through the air inlet pipe, the end of the exhaust pipe is connected with the waste heat recovery assembly, and the waste heat recovery assembly is connected with the tail gas treatment chamber. According to the scheme, tail gas heat can be fully utilized, and the resource utilization rate is increased.

Description

Technical Field

[0001] This application relates to the technical field of waste heat recovery, and particularly to a heat recovery device for a smelting furnace. Background Art

[0002] Smelting furnaces are mainly used for smelting and heating metals such as gold, platinum, silver, copper, iron, stainless steel, aluminum alloy, and aluminum. For the tail gas of smelting furnaces, direct emission is mostly adopted. Since the tail gas of smelting furnaces has relatively high heat energy, if directly emitted, it is easy to cause waste of resources. And when using traditional direct coal-fired smelting furnaces to process materials, due to poor sealing of the furnace door or low negative pressure inside the furnace, some materials are likely to generate dust and smoke from the inside out, polluting the working environment. Utility Model Content

[0003] To solve or partially solve the problems existing in the related technologies, this application provides a heat recovery device for a smelting furnace. By using two suction fans to collect the tail gas inside the furnace and the hot gas emitted outside the furnace respectively, and then using a waste heat recovery component to recover the heat of the tail gas inside the furnace and the hot gas emitted outside the furnace, the energy utilization rate is improved.

[0004] This application provides a heat recovery device for a smelting furnace, including a furnace body, a collection hood, a chimney, an intake pipe, an exhaust pipe, a waste heat recovery component, and a tail gas treatment chamber. A chimney connected to the exhaust pipe is provided at the top of the furnace body. A collection hood is provided outside the furnace body, and the collection hood is connected to the exhaust pipe through the intake pipe. The end of the exhaust pipe is connected to the waste heat recovery component, and the waste heat recovery component is connected to the tail gas treatment chamber.

[0005] Optionally, in some embodiments, a first suction fan is installed in the chimney, and a second suction fan is installed in the intake pipe.

[0006] Optionally, in some embodiments, the waste heat recovery component includes a heat exchange outer shell, heat exchange tubes, a connecting pipe, a cold water tank, and a heat storage pool. One end of the heat exchange outer shell is connected to the exhaust pipe, and the other end is connected to the tail gas treatment chamber through the connecting pipe. And heat exchange tubes for heat recovery are arranged inside the heat exchange outer shell. The beginning of the heat exchange tubes is connected to the cold water tank, and the end is connected to the heat storage pool.

[0007] Optionally, in some embodiments, a secondary recovery component is arranged in the connecting pipe. The secondary recovery component includes a recovery hood, a temperature detector, and a recovery pipe. The recovery hood is arranged in the connecting pipe. One end of the recovery pipe is connected to the recovery hood, and the other end is connected back to the exhaust pipe. A temperature detector for real-time monitoring of the temperature inside the connecting pipe is also arranged at the recovery hood.

[0008] Optionally, in some embodiments, a suction fan is installed at the inlet end of the recovery pipe.

[0009] Optionally, in some embodiments, an exhaust hood is provided at the top of the tail gas treatment chamber, and a sprayer is installed on the exhaust hood. The treatment liquid is sprayed from top to bottom through the sprayer to treat the tail gas.

[0010] Optionally, in some embodiments, an exhaust fan is installed on the exhaust hood.

[0011] Optionally, in some embodiments, a sewage discharge pipe is provided at the bottom of the tail gas treatment chamber.

[0012] The technical solution provided by this application may include the following beneficial effects:

[0013] By setting the first suction fan in this application, the negative pressure in the furnace is increased, the problem of dust and smoke generated by some materials in the smelting furnace from the inside to the outside is alleviated, and environmental pollution is reduced. By setting a collection hood on the outer layer of the smelting furnace, the heat dissipated from the smelting furnace is collected, and the recovered preheat is utilized through the waste heat recovery component, improving the resource utilization rate. The tail gas of the smelting furnace is treated through the tail gas treatment chamber, reducing the pollution caused by the tail gas to the environment.

[0014] 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

[0015] By describing the exemplary embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. Among them, in the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0016] Figure 1 is a schematic structural diagram of a heat recovery device for a smelting furnace shown in an embodiment of the present application;

[0017] Figure 2 is a partial schematic structural diagram of a heat recovery device for a smelting furnace shown in an embodiment of the present application.

[0018] Reference Numerals:

[0019] 1 - furnace body, 2 - collection hood, 3 - chimney, 31 - first suction fan, 4 - intake pipe, 41 - second suction fan, 5 - exhaust pipe, 6 - waste heat recovery component, 60 - heat exchange housing, 61 - heat exchange tube, 62 - recovery hood, 63 - temperature detector, 64 - recovery pipe, 65 - outlet valve, 66 - outlet pipe, 67 - exhaust fan, 68 - connecting pipe, 7 - mounting plate, 8 - cold water tank, 9 - heat storage pool, 10 - tail gas treatment chamber, 101 - treatment liquid, 102 - exhaust hood, 103 - exhaust fan, 104 - sewage discharge pipe, 105 - sprayer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present 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 the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in the present 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 the present 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 the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0022] In the description of the present 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, and is only for the convenience of describing the present 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 the present application.

[0023] Unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral body; 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 internal communication of 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 the present application can be understood according to specific circumstances.

[0024] See Figure 1, in this embodiment, the heat recovery device of the smelting furnace includes a furnace body 1, a collection hood 2, a chimney 3, an intake pipe 4, an exhaust pipe 5, a waste heat recovery component 6, and a tail gas treatment chamber 10. A chimney 3 connected to the exhaust pipe 5 is provided at the top of the furnace body 1. A first suction fan 31 is installed at the chimney 3 to suck the flue gas generated in the smelting furnace, thereby alleviating the problem of dust and smoke generated by some materials in the smelting furnace from the inside to the outside, and reducing environmental pollution; A collection hood 2 is also provided outside the furnace body 1, and the collection hood 2 is connected to the exhaust pipe 5 through the intake pipe 4. A second suction fan 41 is installed at the intake pipe 4. The heat dissipated from the smelting furnace can be collected through the collection hood 2, and the hot air is sucked into the exhaust pipe 5 by the second suction fan 41. The outlet end of the exhaust pipe 5 is connected to the waste heat recovery component 6, and the waste heat recovery component 6 is connected to the tail gas treatment chamber 10.

[0025] During use, the tail gas in the furnace is sucked into the exhaust pipe 5 by the first suction fan 31, and the hot air dissipated outside the furnace is sucked into the exhaust pipe 5 from the intake pipe 4 by the second suction fan 41, so that the tail gas with a large amount of heat can enter the waste heat recovery component 6 through the exhaust pipe 5, improving the energy utilization rate of the smelting furnace.

[0026] See Figure 2 , in this embodiment, the waste heat recovery component 6 includes a heat exchange outer shell 60, heat exchange tubes 61, a connecting pipe 68, a cold water tank 8, and a heat storage pool 9. The heat exchange outer shell 60 is made of heat-insulating material. One end is connected to the exhaust pipe 5, and the other end is connected to the tail gas treatment chamber 10. Heat exchange tubes 61 for heat recovery are arranged inside the heat exchange outer shell 60. A mounting plate 7 is fixedly provided above the heat exchange outer shell 60, and a cold water tank 8 and a heat storage pool 9 are fixedly installed on the mounting plate 7. The cold water tank 8 is connected to the beginning of the heat exchange tubes 61, and the heat storage pool 9 is connected to the end of the heat exchange tubes 61, so that a large amount of heat energy carried by the tail gas in the exhaust pipe 5 is stored in the heat storage pool 9 after heat exchange for use in the factory area, improving the energy utilization rate.

[0027] See Figure 2, in this embodiment, a secondary recovery component is provided in the connecting pipe 68. If the waste heat exhaust gas still carries a large amount of heat after passing through the heat exchange pipe 61, the waste heat exhaust gas can be guided back to the exhaust pipe 5 through the secondary recovery component for secondary waste heat utilization. The secondary recovery component includes a recovery cover 62, a temperature detector 63, and a recovery pipe 64. The recovery cover 62 is arranged in the connecting pipe 68. One end of the recovery pipe 64 is connected to the recovery cover 62, and the other end is connected back to the exhaust pipe 5. A temperature detector 63 for real-time monitoring of the temperature in the connecting pipe 68 is also arranged at the recovery cover 62. A suction fan 67 is installed at the inlet end of the recovery pipe 64. When the temperature detector 63 detects that the heat of the exhaust gas after waste heat recovery is still sufficient, the suction fan 67 is controlled to start, and the exhaust gas is sucked back to the exhaust pipe 5 for secondary waste heat absorption. Further, to prevent the exhaust gas from directly bypassing the heat exchange pipe 61 when flowing normally, an electromagnetic valve can be installed on the recovery pipe 64 to control the opening and closing of the recovery pipe 64. The electromagnetic valve will only open when the suction fan 67 starts.

[0028] The connecting pipe 68 is connected to the tail gas treatment chamber 10 through an outlet pipe 66. An outlet valve 65 is also arranged on the outlet pipe 66 to facilitate pipeline maintenance.

[0029] See Figure 1 , on the basis of the above embodiment, the waste heat recovery component 6 is connected to the tail gas treatment chamber 10. An exhaust hood 102 is provided at the top of the tail gas treatment chamber 10. A sprayer 105 is installed on the exhaust hood 102, and the treatment liquid 101 is sprayed from top to bottom through the sprayer 105 to treat the tail gas.

[0030] Further, an exhaust fan 103 is installed on the exhaust hood 102. Through the exhaust fan 103, the exhaust hood 102 can be assisted in sucking the treated tail gas in the tail gas treatment chamber 10 to discharge it.

[0031] A sewage discharge pipe 104 is arranged at the bottom of the tail gas treatment chamber 10. By opening the sewage discharge pipe 104, the waste treatment liquid 101 at the bottom of the tail gas treatment chamber 10 can be discharged.

[0032] Specific working process:

[0033] The high-temperature tail gas and dissipated heat from the furnace can be sucked into the exhaust pipe 5 through the first suction fan 31 and the second suction fan 41. The high-temperature exhaust gas is transported to the waste heat recovery component 6 through the exhaust pipe 5 for heat exchange. If the temperature of the exhaust gas is still high after heat exchange, it can be guided back to the exhaust pipe 5 through the secondary recovery component for secondary heat exchange, so as to make full use of the heat of the exhaust gas. Finally, the tail gas is centrally collected and treated through the tail gas treatment chamber 10.

[0034] Finally, it should also be noted that in this text, 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 actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" 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 expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art 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 to understand the embodiments disclosed herein.

Claims

1. A heat recovery device for a smelting furnace, characterized in that: The heat recovery device of the smelting furnace comprises a furnace body (1), a collecting hood (2), a chimney (3), an air inlet pipe (4), an exhaust pipe (5), a waste heat recovery component (6), and an exhaust gas treatment chamber (10). The top of the furnace body (1) is provided with a chimney (3) connected to the exhaust pipe (5). A collecting hood (2) is provided outside the furnace body (1), and the collecting hood (2) is connected to the exhaust pipe (5) through the air inlet pipe (4). The end of the exhaust pipe (5) is connected to the waste heat recovery component (6), and the waste heat recovery component (6) is connected to the exhaust gas treatment chamber (10).

2. The heat recovery device for a smelting furnace according to claim 1, characterized in that: A first suction fan (31) is installed in the chimney (3), and a second suction fan (41) is installed in the air inlet pipe (4).

3. The heat recovery device for a smelting furnace according to claim 1, characterized in that: The waste heat recovery component (6) comprises a heat exchange shell (60), a heat exchange pipe (61), a connecting pipe (68), a cold water tank (8), and a heat storage tank (9). One end of the heat exchange shell (60) is connected to the exhaust pipe (5), and the other end is connected to the exhaust gas treatment chamber (10) through the connecting pipe (68). A heat exchange pipe (61) for heat recovery is arranged inside the heat exchange shell (60). The open end of the heat exchange pipe (61) is connected to the cold water tank (8), and the end is connected to the heat storage tank (9).

4. The heat recovery device for a smelting furnace according to claim 3, characterized in that: A secondary recovery component is arranged in the connecting pipe (68), and the secondary recovery component comprises a recovery cover (62), a temperature detector (63), and a recovery pipe (64). The recovery cover (62) is arranged in the connecting pipe (68), one end of the recovery pipe (64) is connected to the recovery cover (62), and the other end is connected back to the exhaust pipe (5). A temperature detector (63) for real-time monitoring of the temperature in the connecting pipe (68) is also arranged at the recovery cover (62).

5. The heat recovery device for a smelting furnace according to claim 4, characterized in that: An exhaust fan (67) is installed at the inlet end of the recovery pipe (64).

6. The heat recovery device for a smelting furnace according to claim 1, characterized in that: An exhaust hood (102) is provided on the top of the exhaust hood (10), and a sprayer (105) is installed on the exhaust hood (102). The sprayer (105) sprays the treatment liquid (101) from top to bottom, thereby treating the exhaust gas.

7. The heat recovery device for a smelting furnace according to claim 6, characterized in that: An exhaust fan (103) is installed on the exhaust hood (102).

8. The heat recovery device for a smelting furnace according to claim 6, characterized in that: A sewage discharge pipe (104) is provided at the bottom of the tail gas treatment chamber (10).

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