Flue gas waste heat recycling device and recycling system for blast furnace
A flue gas waste heat and recovery device technology, which is applied to cleaning heat transfer devices, furnaces, waste heat treatment, etc., can solve the problem of insufficient recovery and maintenance frequency of flue gas waste heat, so as to ensure economical and environmental protection, simple structure, and high efficiency. The effect of combustion efficiency
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Embodiment 1
[0030] A flue gas waste heat recovery device for a blast furnace, comprising a recovery device body 1 , a flue gas cavity 2 , an air cavity 3 and several heat pipes 4 are arranged in the body 1 . Specifically, the body 1 has a cavity inside, and the cavity inside the body 1 is divided into an air cavity 3 and a smoke cavity 2 by a partition 30 .
[0031] The flue gas cavity 2 is provided with a flue gas inlet 17 and a flue gas outlet 18, and the flue gas inlet 17 is used to connect with the blast furnace gas outlet or the blower outlet connected to the blast furnace gas outlet, in order to increase the amount of smoke The residence time of the gas in the flue gas cavity 2 can be set on the flue gas outlet 18 or the pipe connected to the flue gas outlet 18 with back pressure elements or structures, such as back pressure valves, damping holes, etc.
[0032] The air cavity 3 is provided with an air inlet 12 and an air outlet 13, and the air outlet 13 is used for connecting the in...
Embodiment 2
[0043] Based on the first embodiment, the air cavity 3 is provided with an air cavity dividing part 9 ; the air cavity dividing part 9 divides the air cavity 3 into an air inlet cavity 10 and an air outlet cavity 11 .
[0044] Correspondingly, the air inlet 12 is arranged on the sidewall of the air inlet chamber 10 , the air outlet 13 is arranged on the sidewall of the air outlet chamber 11 , and the cold end of the heat pipe 4 is located in the air inlet chamber 10 .
[0045] Described air inlet chamber 10 is far away from an end of air inlet 12, communicates with air outlet chamber 11 away from an end of air outlet 13; The air extracted by the blast furnace blower is filled with air chamber 3, and then heat pipe 4 cold ends are carried out Sufficient cooling ensures that the oxidant gas fed into the blast furnace has sufficient initial temperature to ensure the melting efficiency of the blast furnace.
[0046] In order to prevent heat exchange between the air in the air inle...
Embodiment 3
[0048] Based on Embodiment 1 or 2, the smoke chamber 2 is provided with a smoke chamber dividing portion 14; the smoke chamber dividing portion 14 divides the smoke chamber into a smoke inlet chamber 15 and a smoke outlet chamber 16 .
[0049] Correspondingly, the flue gas inlet 17 is arranged on the side wall of the flue gas inlet chamber 15, the flue gas outlet 18 is arranged on the side wall of the flue gas outlet chamber 16, and the hot end of the heat pipe 4 is located at the side wall of the flue gas In the air inlet cavity 10 , the dust scraper 5 is also located in the flue gas air inlet cavity 15 .
[0050] The end of the flue gas inlet chamber 15 far away from the flue gas inlet 17 is connected with the end of the flue gas outlet chamber 16 far away from the flue gas outlet 18; so that the flue gas and the heat pipe 4 are discharged after sufficient heat exchange, In turn, the recovery efficiency of waste heat from flue gas is improved.
[0051] In order to prevent ...
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