(Daily Question) Coal-to-oil and olefins forum, 2018.1.30
Thread Content
3.jpg Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: What is the function of the insulation material surrounding the turbine cylinder in the (DMTO) olefin separation unit? In the insulation layer surrounding the turbine cylinder, during the heat transfer process from steam to air, due to poor insulation quality in certain areas of this layer, large local temperature differences occur; as a result, thermal resistance exists within this insulation layer. If the insulation of the outer wall of the cylinder is of high quality, the temperatures of both the inner and outer walls of the cylinder are close to the steam temperature; thus, the temperature difference between these walls is small, and no thermal deformation occurs. If the insulation layer of the turbine is damaged or comes off during operation, it will increase heat loss and raise the temperature difference between the inner and outer walls of the cylinder. When this temperature difference is large, thermal stress will be generated, leading to deformation of the cylinder. Therefore, the insulation material surrounding the cylinder serves a dual purpose of reducing heat loss and minimizing thermal deformation. Note: The answers will be announced automatically in two days!
Reduce the temperature difference between the inner and outer walls of the cylinder to prevent deformation of the cylinder
Reduce the temperature difference between the inner and outer walls of the cylinder to prevent deformation of the cylinder.
In the insulation layer surrounding the turbine cylinder, during the heat transfer process from steam to air, due to poor insulation quality in certain areas of this layer, large local temperature differences occur; as a result, thermal resistance exists within this insulation layer. If the insulation of the outer wall of the cylinder is of high quality, the temperatures of both the inner and outer walls of the cylinder are close to the steam temperature; thus, the temperature difference between these walls is small, and no thermal deformation occurs. If the insulation layer of the turbine is damaged or comes off during operation, it will increase heat loss and raise the temperature difference between the inner and outer walls of the cylinder. When this temperature difference is large, thermal stress will be generated, leading to deformation of the cylinder. Therefore, the insulation material surrounding the cylinder serves a dual purpose of reducing heat loss and minimizing thermal deformation.
In the insulation layer surrounding the turbine cylinder, during the heat transfer process from steam to air, due to poor insulation quality in certain areas of this layer, large local temperature differences occur; as a result, thermal resistance exists within this insulation layer. If the insulation of the outer wall of the cylinder is of high quality, the temperatures of both the inner and outer walls of the cylinder are close to the steam temperature; thus, the temperature difference between these walls is small, and no thermal deformation occurs. If the insulation layer of the turbine is damaged or comes off during operation, it will increase heat loss and raise the temperature difference between the inner and outer walls of the cylinder. When this temperature difference is large, thermal stress will be generated, leading to deformation of the cylinder. Therefore, the insulation material surrounding the cylinder serves a dual purpose of reducing heat loss and minimizing thermal deformation