Distribution device and distribution method for high-operating-flexibility liquid

Abstract

The invention discloses a distribution device and a distribution method for high-operating-flexibility liquid. The distribution device comprises a liquid distributor and a liquid distribution control system. The liquid distributor comprises a first feeding tube, a first liquid dispensing tube, a first liquid distributing tube, a second feeding tube, a second liquid dispensing tube and a second liquid distributing tube. Liquid distribution holes are evenly and equidistantly formed in the central line of the bottom side of each of the first liquid distributing tube and the second liquid distributing tube. The liquid distribution control system comprises a first control valve, a second control valve, a flow meter and a flow control interlocking system. The distribution device and the distribution method have the advantages that high-efficiency initial distribution of liquid in a rectification tower can be realized, high filling efficiency is achieved, the operating flexibility is high, the maximum operating flexibility of the liquid distributor can reach 1:13, stable operation can be realized in full load, the occupancy height is low, and the tower height and the manufacturing cost are reduced.

Description

technical field [0001] The invention relates to a liquid distribution device with high operational flexibility and a distribution method, in particular to a liquid distribution device with high operational flexibility used in the field of liquid distribution in packed rectification towers. Background technique [0002] The liquid distributor is located at the upper end of the packing layer, which evenly distributes the liquid to the packing surface to form the initial liquid distribution. In the packed rectification tower, the initial distribution of liquid plays a vital role in the performance of the tower. When the quality of the initial distribution of liquid drops by 40%, the theoretical level of the packing layer is reduced by about 50%. Therefore, the liquid distributor is the most important column. Trim. [0003] Liquid distributors can be divided into gravity type and pressure type according to the driving force of the liquid. The gravity type liquid distributor di...

AI Technical Summary

Problems solved by technology

However, the gravity-type liquid level pipe still needs a height of 200-500mm, which leads to an increase in the height of the tower and increases the cost of the equipment

A double-layer pipe-type liquid distributor with sleeve-type liquid level pipes has the characteristics of increasing operating elasticity, but as the load increases, there is an unstable operating point, that is, the flow rate increases to just beyond the upper part of the inner liquid pipe Along, when the flow rate no longer increases, the liquid level of the outer liquid level pipe is very low, which is not enough to make the liquid flow out evenly from the upper liquid distribution hole, and the quality of liquid distribution becomes worse at this time

The pressure type liquid distributor relies on the pressure head of the pump to send the liquid into the liquid distributor. The pressure type liquid distributor has lower requirements for installation level, small space occupation and simple structure, but the operation flexibility is small, generally 1:3

[0004] CN203778051U has introduced a kind of compound tube type liquid distribution device, and its essence is two-stage tube type liquid distributor, belongs to gravity type liquid distributor, although its structure has greater operating flexibility, but there is a secondary tube type liquid distributor Unstable point where operation is prone to uneven liquid distribution

[0005] CN106390863A introduces a high-distribution-uniform calandria-type liquid distributor with unequal-diameter liquid outlets, which can realize high-uniform distribution of liquid through its liquid distributor, but still has the disadvantage of insufficient operating flexibility. It is difficult to obtain high-quality distribution under small, medium and high return flow rates when the load fluctuation range of this working condition is relatively large

[0006] CN206027379U has introduced a kind of liquid distributor for absorption tower, and its structural form can realize the uniform distribution of liquid when absorption tower operation changes, but for batch rectification tower, especially the batch rectification tower with reactor, There is still the problem of insufficient operational flexibility

[0007] In the batch production process, especially when the distillation column is connected with the batch reactor, the load of the distillation column changes greatly with time, and it is difficult for conventional liquid distributors to achieve high-quality liquid distribution throughout the production process

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