Multi-section combination type non-uniform-division separation plate rectification tower with gas and liquid regulating controller

Abstract

The invention discloses a multi-section combination type non-uniform-division separation plate rectification tower with a gas and liquid regulating controller. The multi-section combination type non-uniform-division separation plate rectification tower device comprises a multi-section non-uniform-division rectification tower segment, one or multi-group gas and liquid regulating controllers, a matched body flange at top of a rectifying tower, and a matched material inlet / outlet pipe. The multi-section combination type non-uniform-division separation plate rectification tower device with the gas and liquid regulating controller solves the problems that the operation elasticity of the rectification tower is low; the production technical scheme regulation is difficult; the investment of multi-ingredient material separation tower is high; and the energy consumption is high.

Description

technical field [0001] The invention relates to a rectification tower in the fractionation process in petrochemical production, and belongs to the technical field of petrochemical industry. Background technique [0002] In the chemical separation process, the rectification tower is the most widely used fractionation separation equipment, but its disadvantages are large investment and high energy consumption. In oil refining, petrochemical and other industries, its energy consumption accounts for even up to 70% of the whole process. Equipment investment exceeds 50%. [0003] As a new type of rectification column, the partition column has great advantages of low energy consumption and low cost for multi-component rectification. At present, it is mainly used for the separation of three-component mixtures. The partition tower is a partition plate installed along the longitudinal direction of the tower in an ordinary rectification tower. In an ordinary rectification tower, the ...

AI Technical Summary

Problems solved by technology

The main disadvantages of this technical solution are: firstly, since the gas phase extraction and gas phase re-entry into the tower both need to set the gas phase redistribution in the tower, so the tower height and the complexity of the internal parts are increased; For plate towers, the diameter of the bypass gas phase pipeline will be large, and the installation and maintenance of related components will be inconvenient; again, for the bypass gas phase pipeline with regulating valves and flow meters, not only the tower height will be increased, but the characteristics of the pressure drop of the gas flow will also be affected. It will become very complicated, the pressure drop will be too large to cause the downcomer to flood under the diaphragm, and the system will not work properly; finally, the size of the control valve will change with the size, the investment will become very expensive, and it will not work at a relatively large scale. Sensitive and accurate regulation of gas phase flow in the low resistance drop range

The main design flaws are: regulating the gas flow has irregular regulation performance curves, it is not easy to realize fine-tuning, the regulation control is poor, and the gas volume is non-linear; With the fine-tuning feature, it is difficult for the square valve plate adjustment mechanism to achieve stable adjustment; due to the transmission parts in the tower, the lubrication and wear problems are difficult to solve, which will affect the long-term normal operation of the equipment

[0010] The thermal coupling process of the above-mentioned clapboard rectification column has many operating variables, and many parameters are coupled with each other. The physical relationship between the gas flow rate on both sides of the clapboard and other variables is complex. The effective distribution and robust control of the gas on both sides of the clapboard is the guarantee. Product indicators and an important means of reducing energy consumption urgently need advanced technical means to solve this industrial problem

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