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Operation steps of alcohol recovery tower

1. The recovered alcohol is added to the distillation kettle to 1 / 2-2 / 3 tanks before operation. 2. Open the steam valve for heating (0.2-0.5MPa gauge pressure) to make the ethanol vapor enter the tower. 3. Turn on the column condenser cooling water and coil cooler cooling water to make the ethanol vapor in the tower condense into liquid after entering the condenser, and open the reflux valve to make all the condensate return to the tower. 4. When the temperature at the top of the tower is stable below 78.5 ℃, open the discharge valve and observe from the flow meter to control the reflux ratio of 1: 2-1: 3, and keep the concentration of recovered ethanol above 93%. 5. During the distillation operation, do not leave the position at will. Observe the ethanol concentration at any time and adjust the reflux ratio in time. When the concentration is high, the reflux ratio is smaller, and when the concentration is low, the reflux ratio is larger. Make the recovered ethanol reach the required concentration. 6. If the amount of recovered ethanol is large, you can use the continuous feeding method. After the distillation kettle is heated to boiling, a small amount of continuous feed into the distillation kettle is added. 7. When the distillation is about to end, when the temperature in the distillation rises to 100 ~ 102 ℃, the temperature at the top of the tower will also rise accordingly. At this time, the reflux valve should be closed, and the heating steam flow of the distillation kettle should be appropriately increased to distill out the residual ethanol in the kettle and the tower. Collect in dilute ethanol storage tank and distill together in the next batch of dilute ethanol.

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Three methods let you choose a good heat exchanger easily

1. The plate type or corrugated type should be determined according to the actual needs of heat exchange occasions. For the case where the flow rate is large and the pressure drop is small, the plate type with low resistance should be selected; otherwise, the plate type with high resistance should be used. According to the fluid pressure and temperature, determine the choice of removable or brazed. When determining the plate type, it is not advisable to select plates with too small veneer area, so as to avoid too many plates, small flow velocity between plates, and low heat transfer coefficient. This problem should be paid more attention to for larger heat exchangers. 2. Regarding the design and selection of plate heat exchangers, generally there are certain requirements for pressure drop, so they should be checked. If the check pressure drop exceeds the allowable pressure drop, the design selection calculation shall be performed again until the process requirements are met. 3. The heat exchanger process refers to a group of parallel flow channels in the same flow direction of a medium in the plate heat exchanger, and the flow channel refers to the medium flow channel composed of two adjacent plates in the plate heat exchanger. Generally, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels. The flow combination form should be calculated based on heat exchange and fluid resistance, and determined when the process conditions are met. Try to make the convection heat transfer coefficients in the cold and hot water channels equal or close to obtain the best heat transfer effect. Although the flow rate between the plates of the plate heat exchanger is not equal, in the calculation of heat transfer and fluid resistance, the average flow rate is still used.

2020-04-16

 发布时间 : 2020-04--16  点击量 : 0

Brief introduction of vertical alcohol recovery tower

The utility model belongs to a purification device for distilling and recovering solvents such as dilute alcohol, methanol and acetone. It includes distillation kettle, distillation tower, splitter, condenser, cooler, instrument rack and equipped instruments. The distillation tower stands upright on the instrument rack, the splitter is stacked on top of the distillation tower, and the condenser is stacked on the cooler. It is also standing on the instrument rack, and a distillation tube is connected to the bottom of the distillation tower on the top of the distillation kettle, and a reflux pipe is also connected to the bottom of the bottom of the distillation tower to the distillation kettle, on the top of the splitter Connect a communication pipe to the condenser, and each instrument is installed on the instrument rack. It has the characteristics of fast installation, energy saving and recovery rate. A distillation recovery tower for solvents such as dilute alcohol, methanol and acetone, including a distillation kettle, a distillation tower, a diverter, a condenser, a cooler, an instrument rack, and the equipped instruments, characterized by: The connection is as follows: the distillation tower stands upright on the instrument rack, the splitter is stacked on top of the distillation tower, the condenser is stacked on the cooler, and the condenser is also upright on the instrument rack. A distillation tube is connected to the distillation tower on the top of the distillation kettle The bottom of the base of the distillation tower is connected with a reflux pipe to the inside of the distillation kettle, and a communication pipe is connected to the top of the splitter to the condenser, and each instrument is installed on the instrument rack.

2020-04-16

 发布时间 : 2020-04--16  点击量 : 0

Operation steps of alcohol recovery tower

2020-04-16

 发布时间 : 2020-04--16  点击量 : 0

A1 level pressure vessel forensics review meeting

ASME renewal meeting

ASME "U" Steel Seal Joint Inspection Association

ASME inspector students from China Special Inspection Institute come to Yubo for training and learning

Operation steps of alcohol recovery tower

Three methods let you choose a good heat exchanger easily

Brief introduction of vertical alcohol recovery tower

Operation steps of alcohol recovery tower