Esterification condenser tube plate protection method

Abstract

The method for protecting the tube plate of the esterification condenser of the present invention comprises the following steps: 1) after the esterification reaction, the alcohol vapor is transported through the liquid alcohol area; 2) the liquid alcohol is pressurized and atomized, and the atomized liquid alcohol and the alcohol Steam contact for mass transfer and heat transfer; 31) through step 2), the alcohol vapor whose temperature drops to 103°C-130°C is transported to the condenser; 32) in step 31), the secondary alcohol is added synchronously, and the addition The secondary alcohol is carried out in step 2); 4) the alcohol vapor whose temperature drops to 103°C-130°C is in contact with the condensing tube to continue cooling. In the present invention, the liquid alcohol absorbs the heat of gaseous alcohol and then enters the condenser for condensation, thereby reducing the temperature of the alcohol vapor in contact with the tubes and avoiding the large stress caused by the instantaneous contact of the high-temperature alcohol vapor with the tubes and causing the weld seam of the tube sheet to fall off; Reduce the temperature of the tube side and the shell side to ensure the stability and service life of the equipment; the heat absorbed by the liquid alcohol can be reused for the esterification reaction, reducing energy waste.

Description

technical field [0001] The invention relates to the technical field of chemical product preparation, in particular to the plasticizer preparation technology and its preparation equipment. Specifically, it shows a method for protecting a tube plate of an esterification condenser. Background technique [0002] Plasticizer is one of the basic materials in the field of chemical technology, and its preparation process needs to be condensed through an esterification condenser; [0003] The current condensation method is that when the temperature of the alcohol vapor is between 220°C and 225°C, it directly contacts with the tube sheet of the esterification condenser to condense and cool down to 50°C; the high-temperature alcohol vapor instantly contacts with the tubes to easily generate stress, causing the tube sheet to weld. The cracks fall off, which seriously restricts normal production, and the temperature difference between the tube side and the shell side is large, causing st...

AI Technical Summary

Problems solved by technology

[0003] The current condensation method is that when the temperature of the alcohol vapor is between 220°C and 225°C, it directly contacts with the tube sheet of the esterification condenser to condense and cool down to 50°C; the high-temperature alcohol vapor instantly contacts with the tubes to easily generate stress, causing the tube sheet to weld. The cracks fall off, seriously restricting normal production, and the large temperature difference between the tube side and the shell side causes stress concentration and damages equipment; at the same time, a large amount of heat energy of alcohol vapor is removed by water, which is a serious waste