Three-tower energy-saving differential pressure alcohol distillation production system and technological process thereof

Abstract

The invention discloses a three-tower energy-saving differential pressure alcohol distillation production system and a technological process thereof. The three-tower energy-saving differential pressure alcohol distillation production system comprises a two-tower atmospheric distillation system formed by an existing mash tower, an atmospheric rectification tower and accessory equipment, and a pressurization rectification system formed by a pressurization rectification tower and accessory equipment. According to the invention, on the basis of the existing two-tower atmospheric distillation equipment, a pressurization rectification tower is additionally arranged, the operating pressure of the original two-tower is unchanged, the pressurization rectification tower is used for processing dilute alcohol from the bottom of the original atmospheric rectification tower, and the dilute alcohol accounts for 1 / 3 of the total output; and compared with the two-tower atmospheric distillation, the steam is saved by more than 20 percent, the cooling water is saved by more than 30 percent, the steam and water saving effect is obvious, the consumption of steam is greatly reduced, the production cost of enterprises is reduced, and the transformation cost of the enterprises is greatly reduced simultaneously.

Description

technical field [0001] The invention relates to alcohol distillation technology. Background technique [0002] Since entering the 21st century, my country's alcohol industry has developed rapidly, and the society has higher and higher requirements for alcohol quality and energy saving, and the new national standard for edible alcohol GB10343-2008 has been implemented. In order to adapt to the changes in this new situation, alcohol production enterprises have carried out transformations on their distillation sections. Most of my country's alcohol production enterprises use the traditional two-tower atmospheric distillation system with vapor phase passing through the tower. The system consists of a mash tower, an atmospheric rectification tower and ancillary equipment. [0003] Due to the low investment in equipment and low operating costs of this process, it has been favored by the majority of alcohol production enterprises for many years. However, because the two-tower at...

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Problems solved by technology

However, because the two-tower atmospheric distillation equipment adopts the vapor phase to pass through the towers, there are few opportunities to remove impurities. In addition, the vapor phases between the towers are directly connected to each other, and the mutual influence is large. When the operation of any tower is unstable, the alcohol quality will be affected. Influence, low product qualification rate, large steam consumption

[0004] At present, some use multi-effect thermal coupling distillation technology, although it can effectively reduce the energy consumption of the distillation section, but the current general alcohol multi-effect distillation process at home and abroad requires the crude distillation tower to be operated under negative pressure, and the rectification tower to be pressurized operation, but the equipment of the two towers of atmospheric distillation does not meet the requirements of negative pressure and pressurized operation, all equipment needs to be replaced, and the huge investment discourages the majority of alcohol manufacturers

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