Suspension type chimney inner barrel weldless supporting system and chimney

Abstract

The invention discloses a suspension type chimney inner barrel weldless supporting system and a chimney, wherein the supporting system comprises an inner barrel thickened convex edge, a supporting ring beam, a supporting platform and a placing structure arranged between the supporting ring beam and the supporting platform; a chimney inner barrel is supported on the supporting ring beam through the inner barrel thickened convex edge; and the supporting ring beam is supported on the supporting platform through the placing structure. The chimney inner barrel weldless supporting system of the chimney disclosed by the invention is reasonable in stress, reliable for force transfer, free of welding construction and easy for construction.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a chimney in a thermal power plant. Background technique [0002] With the implementation of environmental protection policies, multi-pipe hanging chimney inner tubes have been widely used in large-capacity thermal power generation unit projects. [0003] The flue gas emitted by the thermal power plant through the chimney is often high in humidity and low in temperature, and the flue gas is easy to condense on the inner wall of the chimney, and the residual sulfur trioxide in the flue gas dissolves to form highly corrosive sulfuric acid. Under the action of flue gas pressure, the corrosive gas and liquid in the flue will seriously corrode the structural materials inside the chimney, which directly affects the durability and safety of the chimney structure. In order to prevent smoke from corroding the load-bearing reinforced concrete outer cylinder, a smoke exhaust inner c...

AI Technical Summary

Problems solved by technology

[0008] 3. Due to the narrow gap between the outer side of the inner tube and the support beam when the inner tube is hoisted, if the inner tube stiffener and corbels are pre-welded on the ground, the inner tube will not be able to pass through the support beam during hoisting, so the stiffeners and corbels can only be inside Welding on the outer side of the inner cylinder can only be started after the hoisting cylinder is basically in place

The supporting beam of the inner cylinder is usually set at 100-160m, and welding a large number of steel plates at high altitude will increase the difficulty of construction technology, and there are hidden dangers of high altitude safety;

[0009] 4. Stiffened corbels are welded at high altitude on site. Due to the many and thick welds, the steel plate is heated and deformed during welding. Once there is an error in the welding process, the surface of the corbel steel plate at the support will be deformed greatly, resulting in the elevation of the inner cylinder support. There is a height difference, and the inner cylinder with multi-point support will produce a vertical deviation, which will increase the difficulty of installing the inner cylinder;

[0010] 5. The installation of the inner cylinder often needs to be interleaved with the processes of spraying paint and covering insulation materials. On-site welding requires the use of open flames, which will increase the hidden danger of fire during the construction process;

[0011] 6. The welding connection requires that the inner cylinder material can withstand high temperature and have weldability, so it is mainly suitable for inner cylinders made of metal materials, and the scope of application is small

For inner cylinders made of non-metallic materials with superior anti-corrosion properties, such as chimneys, welding connections are not feasible because the materials are not resistant to high temperatures and are not weldable.

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