Flue device for thermal power generation

Abstract

The invention discloses a flue device for thermal power generation and belongs to the field of steel structures. The flue device is characterized in that multiple support surface plates are connectedto form four flue walls of the flue device, a plurality of steel frame bars are arranged on the outer wall face of each flue wall along the flowing direction of flue gas at first preset intervals, thesteel frame bars of every two adjacent outer wall faces are connected, a plurality of steel beams are fixedly arranged between every two adjacent steel frame bars along a direction vertical to the flowing direction of the flue gas at second preset intervals, and a plurality of rib plates are fixedly arranged between every two adjacent steel beams along the flowing direction of the flue gas at third preset intervals. The flue device has the advantages that by using the steel beams and the rib plates to replace part of the steel frame bars, the use number of the steel frame bars and corresponding inner support rods can be reduced, flue gas flowing resistance is reduced, internal area, which needs corrosion preventing, of the flue device is reduced, and operation and maintenance costs are reduced.

Description

technical field [0001] The invention relates to the field of steel structures, in particular to a flue device for thermal power generation. Background technique [0002] During the power generation process of coal-fired, gas-fired or oil-fired power generation units in thermal power plants, a large amount of smoke will be generated due to the combustion of fuel. The flue gas generated by the combustion of the unit will pass through the flue gas treatment equipment such as desulfurization, dust removal and desulfurization successively under the drive of induced draft fan, blower fan and other equipment. Exhaust to atmosphere through chimney. With the continuous increase of domestic power supply demand, domestic 1000MW-class thermal power plants are increasing day by day, and the flue gas volume generated by high-power units makes the cross-section of the flue devices on both sides of the chimney larger and larger. [0003] The flue device in the prior art usually adopts fou...

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Problems solved by technology

[0005] The amount of steel structure used in the flue device in the prior art is large. Due to the large number of inner struts used, not only the area inside the flue device that requires anti-corrosion is increased, but also the corrosion leakage between the inner struts and the support panel is increased. At the same time, it is easy to cause the increase of flue gas flow resistance, resulting in the increase of fan power, waste of energy, and increase of operation and maintenance costs

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