Tunnel kiln smoke-gas heat exchanging dust-removal emission reduction device

Abstract

The invention relates to a tunnel kiln smoke-gas heat exchanging dust-removal emission reduction device, which is characterized in that a main body of the device is a vertical round-shell straight-pipe convection heat exchanger, the straight pipes are arranged on the concentric circumferences inside the vertical round shell, the straight pipes are fixed on an upper pipe sheet and a lower pipe sheet, a guide separation plate is arranged on the middle of the straight pipes, and the upper end of the round shell is connected with a smoke-gas distributing box; the lower part of the round shell is fixedly connected with a cold air introduction box, the upper part is fixedly connected with a hot air discharging box, the middle part of the round shell is fixedly connected with the air guide box, the side wall of the smoke-gas distributing box is connected with a smoke discharging main pipe, the lower end of the round shell is connected with a smoke-gas collecting box, and the smoke-gas collecting box is connected with a suction elbow of a smoke ventilator. The device is provided with a water sprinkler which is convenient for the periodic washing, so dirt of the smoke gas can be prevented from scaffolding not to block the smoke flue. An atomizer with a nozzle facing downwards is provided and is used for atomizing to remove the dust or for spraying magnesium hydroxide solution to remove the sulfur, so the dust can be removed and the emission of the harmful gases such as sulfur dioxide can be reduced while the smoke flue is free from being blocked during the heat exchanging process.

Description

technical field [0001] The invention belongs to a kiln flue gas heat exchange device, in particular to a tunnel kiln flue gas heat exchange, dust removal and emission reduction device. Background technique [0002] At present, the flue gas temperature of high-temperature oil-fired tunnel kilns used for firing refractory products in China is generally above 300°C, or even as high as 700°C. The existing technology is to install a flue multi-tube heat exchanger, the flue gas flows outside the tube, and the air flows inside the tube, so that the air is preheated, used for combustion or drying green embryos, and reduces fuel consumption. However, because the flue gas contains a large amount of compounds of magnesium, calcium, sulfur, potassium, sodium and other elements and moisture, as well as carbon particles and dust that have not been completely burned, nodules are deposited on the outer wall of the heat exchange tube when the flue is cold, gradually blocking the flue gas. R...

AI Technical Summary

Problems solved by technology

However, because the flue gas contains a large amount of compounds of magnesium, calcium, sulfur, potassium, sodium and other elements and moisture, as well as carbon particles and dust that have not been completely burned, nodules are deposited on the outer wall of the heat exchange tube when the flue is cold, gradually blocking the flue gas. and it is difficult to unblock, which has become a technical problem for the flue gas heat exchange device to fail to operate normally

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