Experimental device capable of realizing absorption and regeneration combination based on wetted wall tower, and regeneration tower

Abstract

The invention provides an experimental device capable of realize absorption and regeneration combination based on a wetted wall tower, and a regeneration tower, wherein exhaust gas and absorbing liquid which is in the wetted wall tower (6) perform gas-liquid reaction; waste liquid out of the wetted wall tower (6) is conveyed to the regeneration tower (10) through a peristaltic pump (14) arranged at a waste liquid outlet; absorbing liquid in a liquid storage tank (11) is supplemented into the wetted wall tower (6) through a peristaltic pump (14) arranged at an absorbing liquid inlet of the wetted wall tower (6); the exhaust gas out of the wetted wall tower (6) enters an ice bath device (7), and then enters an absorbing bottle (8) after being subjected to heat exchange by the ice bath device (7); and after water vapor and ammonia gas in the exhaust gas are removed by the absorbing bottle (8), the exhaust gas enters an exhaust gas analyzer (12). The wetted wall tower serves as a reactor and can control gas-liquid reaction efficiency and gas-liquid reaction rate; and the regeneration tower takes a filling layer as mass transfer equipment between a gas phase and a liquid phase, and the gas phase and the liquid phase are in differential contact, and are continuously changed in the regeneration process, so the regeneration efficiency of waste liquid is adequately guaranteed and energy sources are recycled.

Description

technical field [0001] The invention relates to mechanical equipment for removing harmful gases in flue gas, in particular to an experimental device and a regeneration tower based on the combination of absorption and regeneration of a wet wall tower. Background technique [0002] During the combustion of coal, a large amount of harmful gases such as nitrogen oxides, sulfur oxides, and carbon dioxide will be emitted. These harmful gases can cause environmental problems such as acid rain, photochemical smog, and greenhouse effect. Therefore, it is necessary to take certain measures to remove harmful gases in the flue gas. [0003] At present, wet methods are mainly used in industry to remove harmful gases in flue gas. It fills the equipment with absorption liquid, the flue gas passes through the absorption liquid, and performs a gas-liquid two-phase reaction between the absorption liquid and the flue gas to achieve the purpose of removing harmful gases in the flue gas. [00...

AI Technical Summary

Problems solved by technology

[0005] Since this bubble reactor has no heat exchange area, the reaction temperature cannot be controlled, and the residence time of gas in the bubble reactor is inconsistent

The gas stays in the absorption liquid for a short time, which cannot meet the requirements of slow reaction, and with the progress of the reaction, there are problems such as uneven distribution of liquid up and down. After the gas enters the bubbling reactor, the pressure drop will be large, resulting in The gas pressure is reduced, and sometimes it is necessary to increase the pump pressure, which will inevitably cause a waste of energy

Bubble reactor has low liquid storage capacity and low absorption liquid mass transfer coefficient, and the reaction rate drops significantly after continuous operation. In a single bubble reactor, it is difficult to achieve a high gas-liquid conversion rate

In addition, since the absorption liquid is directly in contact with the intake pipe, when the experiment is stopped, it is easy to cause the phenomenon of sucking back in the intake pipe, which will affect the absorption efficiency and other data of the next experiment.

[0006] It can be seen that when the harmful gas in the flue gas is absorbed by the bubbling reactor, the absorption efficiency is low, and the removal rate is difficult to guarantee.

[0007] Moreover, the waste liquid after the reaction in the bubbling reactor cannot be recycled, resulting in a waste of energy

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