A gas distributor for a circulation scrubber and its design method

Abstract

The invention provides a gas distributor for a circulating-flow scrubbing tower and a design method of the gas distributor. The gas distributor is of a branch-shaped distributor structure and is provided with a central gas inlet pipe and at least one branch pipe, wherein the branch pipes are connected with the central gas inlet pipe, a blind plate is arranged at the tail end of the central gas inlet pipe, liquid discharging holes are formed in the blind plate at the tail end of the central gas inlet pipe, and liquid discharging holes are also formed near the lowest ends or the tail ends of thebranch pipes; gas spraying holes are formed in the pipe walls of the branch pipes, and blind plate holes are formed in the tail ends of the branch pipes, or Venturi-type spraying nozzles are arrangedin the branch pipes. The pressure drop and the gas velocity of the spraying holes are adopted as the overall design and control indexes of the gas distributor, the design process is simple and easy to implement, and the diameter distribution and phase interface of bubbles can be controlled; a circulating flow can be formed in a flow guiding canister of the scrubbing tower, the standing time of gas at a liquid layer is prolonged, and the humidity of the gas at the liquid layer and the scrubbing efficiency are improved; even distribution of the gas flow is ensured, discharging of liquid and solid sediments is facilitated at the same time, and the gas distributor is applicable to large-scale gas-liquid-solid three-phase separation equipment.

Description

technical field [0001] The invention relates to a gas distributor for a circulation washing tower and a design method thereof, belonging to the technical field of chemical industry. Background technique [0002] 1. Dust removal process [0003] In the process of gas processing, the dust in the gas will block the process pipeline, cause fouling and deactivation of the catalyst, increase the fouling thermal resistance of the heat exchanger, reduce the heat transfer efficiency, and reduce the performance of the end product, etc., which restrict the clean production and even the stability of the device. The key factor for long production must be solved first in the gas processing process. [0004] The effect of gas purification is related to the particle size distribution and mechanical strength of dust. For the separation of micron-sized solid dust particles, bag dust removal and electrostatic dust removal are more commonly used in non-hydrocarbon systems at normal temperatur...

AI Technical Summary

Problems solved by technology

[0010] 2. The ash wrapped in some large bubbles in the bubbling bed has a short residence time and cannot be wetted and transferred to the water phase for removal

Because the gas in the bubbling bed is a one-pass type and cannot circulate, the bubbles stay for a short time under the action of buoyancy, which is not conducive to the collapse of the bubbles and the discharge of ash and wetting.

[0011] 3. Wet dust removal involves gas-liquid-solid three-phase, and the continuous discharge of solid residue is difficult

The gas distributor still adopts ring pipes outside, and the multi-layer gas distribution branch pipe structure is not suitable for conveying complex systems containing solid particle deposition

Moreover, the liquid sealing effect of the liquid sealing tank at the bottom of the gas collecting pipe is related to the height of the liquid layer in the tower. For the gas to go back and forth, there must be a considerable liquid sealing height in the liquid sealing tank, and due to the design of the upper and lower layers of the gas distribution branch pipe , the space occupied by the sparger is relatively large, and it is not suitable for wet dust removal that requires rapid phase separation in the sparger

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