Waste heat recycling system and method of baked brick tunnel kiln

Abstract

The invention discloses a waste heat recycling system and method of a baked brick tunnel kiln. The system contains a drying kiln chamber, wherein at least one of contiguous waste heat recycling kiln chambers are arranged on one side of the drying kiln chamber, the upper side of each waste heat recycling kiln chamber is provided with a branched air channel, two exhaust ducts and a branched induced fan, the main air channel on the top of the drying kiln chamber is communicated with the branched air channels, two exhaust ducts and a branched induced fan are separately arranged on the two sides of the waste heat recycling kiln chamber, the bottom of each branched air channel is provided with a plurality of exhaust vents which are arranged regularly with uniform spacing, two side walls of each waste heat recycling kiln chamber are provided with a plurality of exhaust vents or a plurality of groups of exhaust vents, two sides of each waste heat recycling kiln chamber are provided with a plurality of exhaust shafts, the exhaust vents are communicated with the exhaust shafts through air inlet ducts, the bottoms of the exhaust shafts on one side of each waste heat recycling kiln chamber are communicated so as to form a main air outlet duct and one exhaust shaft on one side of the waste heat recycling kiln chamber is communicated with the exhaust ducts on the same side. The invention can reach the aim of ensuring raw bricks not to collapse and fracture and reducing cracks.

Description

technical field [0001] The invention relates to a flue gas waste heat utilization technology, in particular to a sintered brick tunnel kiln waste heat recovery system and method. Background technique [0002] At present, in the process of producing sintered bricks in the existing sintered brick tunnel kiln, the heat emitted by the bricks in the roasting kiln is directly sent into the drying kiln room, and the wet bricks sent into the drying kiln room are dried, and the remaining heat is passed through The induced draft fan is directly discharged from the pipe on the roof of the drying kiln chamber. Since the temperature of the exhausted flue gas waste heat is between 95 and 125°C, it is of great use value. Therefore, the direct discharge will cause heat energy waste and environmental pollution. Savings are bad. In addition, if the hot air directly introduced into the drying kiln chamber from the roasting kiln is too large, the wet bricks placed on the kiln car in the drying...

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Problems solved by technology

[0002] At present, in the process of producing sintered bricks in the existing sintered brick tunnel kiln, the heat emitted by the bricks in the roasting kiln is directly sent into the drying kiln room, and the wet bricks sent into the drying kiln room are dried, and the remaining heat is passed through The induced draft fan is directly discharged from the pipe on the roof of the drying kiln chamber. Since the temperature of the exhausted flue gas waste heat is between 95 and 125°C, it is of great use value. Therefore, the direct discharge will cause heat energy waste and environmental pollution. saving is bad

In addition, if the hot air directly introduced into the drying kiln chamber from the roasting kiln is too large, the wet bricks placed on the kiln car in the drying kiln chamber will become soft, lose their support, and cause collapse, fracture, and cracks. Because there are wet bricks at the front of the drying kiln and half-dried bricks at the back, the temperature is too high, and the operators cannot enter, so they have to pull out the kiln car and rearrange the bricks, which is time-consuming, laborious, and wastes fuel. The rate is also high; if the heat is too small, the adobe cannot be completely dried, which will affect the roasting quality and output, resulting in an increase in production costs

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