Denitration high-temperature flue pull rod fixing structure

Abstract

The invention provides a denitration high-temperature flue pull rod fixing structure arranged outside a nonmetal expansion joint connecting a denitration reactor and an inlet flue. The inlet flue comprises a vertical-section flue positioned on the lower portion and a horizontal-section flue positioned at the top. The denitration high-temperature flue pull rod fixing structure comprises two pull rod components symmetrically arranged on two sides of the denitration reactor and the inlet flue, and each pull rod component comprises a first pull rod fixing member fixedly arranged outside the denitration reactor, a second pull rod fixing member fixedly arranged outside the inlet flue and a pull rod with two ends respectively connected with the pull rod fixing members through shear bolts; one shear bolt is coaxial with an intersecting line of a vertical bisecting face of the vertical-section flue and a horizontal bisecting face of the horizontal-section flue, and another shear bolt is coaxial with an intersecting line of the horizontal bisecting face of the horizontal-section flue and a vertical bisecting face of a supporting leg, close to one side of the inlet flue, of the denitration reactor. By the structure, the supporting problem of a denitration flue in front of an inlet of the denitration reactor can be solved without designing a steel-structure frame beam individually.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a fixing structure for a denitrification high-temperature flue tie rod. Background technique [0002] In the SCR flue gas denitrification equipment of the power station using vertical air flow, the inlet flue of the denitrification reactor is generally a vertical flue, which is generally made of steel structure. It is usually connected with the reactor by a non-metallic expansion joint. The temperature of the denitration flue is generally above 300°C, and the expansion joint can absorb the thermal displacement caused by the temperature change of the high temperature flue. But at the same time, it will also change the force, and the most influential one is the internal pressure thrust of the expansion joint. In order to overcome the force of this part, an external force must be overcome to ensure the stability of the flue. The internal pressure thrust of the ex...

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Problems solved by technology

For this reason, it is necessary to design and install an independent guide bracket to support the vertical flue at the entrance, so as to ensure the stability of the flue while bearing the horizontal thrust of the internal pressure of the non-metallic expansion joint 200. At the same time, in order to support the guide bracket, the span of the fixed bracket at the bottom It is also necessary to completely cover the inlet flue and the denitrification reactor. This will not only increase the structural load, but also increase the amount of work, resulting in increased investment and increased construction period.

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