三室炉烟气内外循环结构

Abstract

本实用新型涉及再生铝加工技术领域，涉及一种三室炉烟气内外循环结构。本实用新型的高温室与加热室之间通过铝液流道相连通，裂解室用于将熔化铝液经由导向流道传输至加热室内，外循环机构将裂解室内的有机烟气输送至高温室或者加热室内进行二次燃烧，内循环机构将高温室或者加热室内的高温烟气进行烟气循环以对投入到裂解室内的铝料进行加热，可让高温烟气可以尽量长的在炉内高温环境中停留，提高余热利用率，节约能源，可燃物和有害物质将被完全燃烧和分解，提高烟气温度，减少烟气中的有害物质排放，同时有效地抑制有害物的二次合成，可以综合治理烟气排放问题，节省了大量的投资及运行成本。

Claims

1. A three-chamber furnace flue gas internal-external circulation structure, characterized in that, include: A melting furnace is provided with a melting chamber, and a partition wall is provided in the melting chamber to divide the melting chamber into a high-temperature chamber and a heating chamber. The high-temperature chamber and the heating chamber are connected by an aluminum liquid flow channel. A pyrolysis chamber is provided on the melting furnace. A guide channel is provided between the pyrolysis chamber and the heating chamber. The pyrolysis chamber is used to transfer molten aluminum liquid to the heating chamber through the guide channel. An external circulation mechanism is installed on the melting furnace. The external circulation mechanism is used to transport the high-temperature flue gas in the pyrolysis chamber to the high-temperature chamber or the heating chamber. An internal circulation mechanism is installed on the melting furnace. The internal circulation mechanism is used to circulate the high-temperature flue gas in the high-temperature chamber or heating chamber to heat the aluminum material put into the pyrolysis chamber.

2. The three chamber furnace flue gas internal and external circulation structure of claim 1, wherein, The external circulation mechanism includes a first pipeline and an external circulation fan. The first pipeline is connected to the flue gas outlet at the top of the pyrolysis chamber. The external circulation fan is connected to the first pipeline and the external circulation fan. The outlet of the external circulation fan is connected to the main pipeline. The main pipeline is connected to two branch pipelines. The two branch pipelines are respectively connected to the high-temperature chamber and the heating chamber. The external circulation fan transmits the high-temperature flue gas in the pyrolysis chamber to the high-temperature chamber or the heating chamber through the branch pipelines via the first pipeline.

3. The three chamber furnace flue gas internal and external circulation structure according to claim 2, characterized in that, A waste discharge pipe is installed on the first pipeline, and the waste discharge pipe is located below the first pipeline. A control valve is installed on the branch pipeline.

4. The three chamber furnace flue gas internal and external circulation structure of claim 1, wherein, The internal circulation mechanism includes an exhaust pipe and a circulation pipeline. The circulation pipeline is installed on the melting furnace. The exhaust pipe is connected to the exhaust port of the melting furnace wall and to an internal circulation fan. The internal circulation fan is connected to the circulation pipeline through a connecting pipe. The internal circulation fan transmits high-temperature flue gas from the high-temperature chamber or heating chamber to the circulation pipeline through the exhaust pipe, and forms an upward high-temperature flue gas turbulence in the pyrolysis chamber at the exhaust end of the circulation pipeline.

5. The three chamber furnace flue gas internal and external circulation structure according to claim 4, characterized in that, The circulation pipeline includes a guide duct, on which an upper air outlet component, a middle air outlet component, and a lower air outlet component are provided. The upper air outlet component, the middle air outlet component, and the lower air outlet component are arranged sequentially from top to bottom on the pyrolysis chamber. The air outlet end of the upper air outlet component is located above the flue gas outlet, the air outlet end of the middle air outlet component is located below the flue gas outlet, and the air outlet end of the lower air outlet component is located above the melting tank at the bottom of the pyrolysis chamber. The high-temperature flue gas transported by the internal circulation fan is blown out synchronously or asynchronously through the upper air outlet component, the middle air outlet component, and the lower air outlet component to form a high-temperature flue gas turbulence.

6. The three chamber furnace flue gas internal and external circulation structure of claim 5, wherein, The upper air outlet component includes an upper duct, which has a U-shaped structure. The middle part of the upper duct is connected to the air guide duct. Multiple upward blowing pipes are evenly arranged on the three inner sides of the upper duct. The three side walls of the pyrolysis chamber have upper openings that match the upward blowing pipes. The upward blowing pipes pass through the upper openings. The upper duct is used to synchronously circulate and blow out high-temperature flue gas through the upward blowing pipes on the three side walls of the pyrolysis chamber.

7. The three chamber furnace flue gas internal and external circulation structure as claimed in claim 5, wherein, The central air outlet component includes a central duct, the middle of which is connected to the air guide duct, and central blowing air pipes are provided at both ends of the central duct. The inner wall of the pyrolysis chamber is provided with an installation groove that matches the central blowing air pipe. The central blowing air pipe is embedded in the installation groove, and a smoke outlet is provided on the central blowing air pipe.

8. The three chamber furnace flue gas internal and external circulation structure as claimed in claim 5, wherein, The lower air outlet component includes a lower pipe, the middle of which is connected to the air guide pipe. Multiple downward blowing pipes are evenly arranged on the lower pipe, and a lower opening matching the downward blowing pipe is provided on the side wall of the pyrolysis chamber.

9. The three chamber furnace flue gas internal and external circulation structure as claimed in claim 1, wherein, The bottom of the pyrolysis chamber is provided with a melting tank, and the heating chamber is provided with an aluminum liquid tank. The bottom of the melting tank is connected to the aluminum liquid tank through a guide channel. The bottom surface of the melting tank is higher than the bottom surface of the aluminum liquid tank, so that the guide channel is inclined towards the aluminum liquid tank.

10. The three chamber furnace flue gas internal and external circulation structure as claimed in claim 8, wherein, An inclined air duct is installed on the lower air duct, and the air outlet of the inclined air duct faces upward towards the pyrolysis chamber.

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