Rectification system, ventilator calculation depends on the presence or absence of reflux. When the cooling medium is stopped, the remaining cold is usually not considered, because the time during which this part of the cooling occurs is very limited and depends on the actual arrangement of the piping. If the process piping system is very large and not insulated, then heat loss should be considered. Uvc Lamp,Uv Germicidal Bulb,Uv Germicidal Lamp,Uvc Tube Changxing leboom lighting product CO.Ltd. , https://www.leboomuvs.com
In a rectification system, the ventilator calculation depends on the presence or absence of backflow. When the cooling medium is stopped, the remaining cold is usually not considered, because the time during which this part of the cooling occurs is very limited and depends on the actual arrangement of the piping. If the process piping system is very large and not insulated, then heat loss should be considered. Due to the usual case, detailed heat balance and material balance calculations are difficult. Therefore, a generally accepted simplified principle for determining the amount of bleed is listed.
(1) full coagulation
The amount of bleed is the total amount of steam entering the condenser, and the venting amount is recalculated according to the temperature under the new gas phase composition and the heat input under the discharge condition. The buffering capacity of the top stream 191 is sprinkled according to its normal capacity. The residence time of the bit is less than 10%. If the rushing medium fails for more than this time and there is no flow, the composition, temperature and amount of steam in the overhead will vary greatly.
(2) Partial condensation
The amount of bleed is the difference between the amount of steam entering and exiting under venting conditions. The amount of steam entering should be calculated on the basis of (1). If the composition of the reflux or the flow rate changes, the amount of steam entering the condenser should be determined according to the new conditions.
(3) The air cooler fan is faulty
The effect of white convection, even if the fan fails. If there is no major change in the venting conditions, the air cooler usually has 20% to 30% condensation, so the venting control of the two conditions of full or partial condensation is considered to be 70% to 80% condensation. However, the actual load usually depends on the design performance of the air cooler. If a mechanical failure occurs using a variable pitch fan and a variable pitch device of the fan, the cooling capacity of the air cooler is reduced.
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