A dividing-wall column or divided-wall column is a type of new column to be used in separating a multicomponent mixture. It is however not widely used in industry as people are still doing some researches on that topic.
It looks exactly similar to the normal distillation column. The only noticeable and probably main difference is that a vertical wall is installed or welded inside the column that separates the internal column into two regions.
Since distillation is responsible for the largest fraction of huge amount of energy consumed in process industries, it then becomes a major concern and primary target of energy saving effort in industrially developed countries. This separation process also is the most widely used in industry compared to other unit operations and needs most of the time a large expenditure of capital.
It is important to do many improvements in this area as the distillation applications will definitely increase from year to year. Therefore distillation systems that are sustainable and economically feasible must designed and if they are proven to be successful, they must be introduced. This is the reason why a dividing-wall column is introduced as it is said that this type of column is capable of reducing both capital and operating costs.
The welded wall separates the column into two sections namely a feed section and a side draw section. The former acts as a prefractionator and the latter allows the separation of high purity intermediate-boiling component in a ternary mixture, for example.
Example of a dividing-wall column:
So only one column is required to separate a mixture that contains A,B and C. Since we know that we need at least two columns to separate a ternary mixture via ordinary distillation, a dividing-wall column is obviously advantageous in terms of capital cost. The capital cost can be reduced by installing this type of column. In addition to that it has been proven that this type of column also consumes relatively less energy than the two-column system. The operating cost is said to be reduced up to 10%.
le and economically feasible must be designed and introduced
Therefore distillation systems that are
It looks exactly similar to the normal distillation column. The only noticeable and probably main difference is that a vertical wall is installed or welded inside the column that separates the internal column into two regions.
Since distillation is responsible for the largest fraction of huge amount of energy consumed in process industries, it then becomes a major concern and primary target of energy saving effort in industrially developed countries. This separation process also is the most widely used in industry compared to other unit operations and needs most of the time a large expenditure of capital.
It is important to do many improvements in this area as the distillation applications will definitely increase from year to year. Therefore distillation systems that are sustainable and economically feasible must designed and if they are proven to be successful, they must be introduced. This is the reason why a dividing-wall column is introduced as it is said that this type of column is capable of reducing both capital and operating costs.
The welded wall separates the column into two sections namely a feed section and a side draw section. The former acts as a prefractionator and the latter allows the separation of high purity intermediate-boiling component in a ternary mixture, for example.
Example of a dividing-wall column:
le and economically feasible must be designed and introduced
Therefore distillation systems that are
sustaina
ble and economically feasible must be designed and introduced.
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