The problem of the spacing of the flue reinforcement ribs, there will be prizes for replying
Thread Content
The spacing of the flue reinforcement ribs calculated according to the "DLT 5121-2000 Technical Specification for the Design of Flue, Air and Pulverized Coal Pipelines in Thermal Power Plants + Supporting Design Calculation Methods" standard is too small, which means they are arranged too densely. Looking at the calculation in the picture below, the spacing of the reinforcing ribs determined from the standard smoke gauge specification is 928, which is too small. Here comes the problem: The spacing between the flue reinforcement ribs installed by other manufacturers on site is very large and does not meet the standard specifications. How can I increase the spacing? After increasing the spacing, how to verify whether the spacing is safe through calculation? How is it calculated? Or am I misunderstanding this standard? Is it possible to increase this spacing by adjusting parameters?
Determined through strength calculation according to design specifications
There is no strength problem with the flue, just consider the stiffness design.
The maximum spacing between strength and stiffness you checked refers to the maximum spacing when the strength and stiffness of the corresponding steel plates meet the conditions. The design of the flue needs to take into account the influence of internal pressure, wind pressure, ash load, temperature and other factors. The maximum spacing queried is the minimum requirement. Generally, when other factors are added, this value will be much smaller. In addition, the maximum spacing between steel plates needs to be checked on pages 122 to 129 of the specification.
Is there any kind of calculation flange that can increase this distance? Or if I increase the spacing, is there any calculation to verify that the spacing is safe?
What is the purpose of increasing the spacing?
This method is not feasible. If you look at the maximum spacing for a single steel plate, the design specifications do have margins, but other factors of the flue gas, such as the resonance design of the plate, are not considered. Your idea is basically unfeasible and the reduction is very small. The solution is to make a circular flue or use professional structural software to calculate it.