Desulfurizing tower for gas desulfuration by using liquid phase catalytic oxidation

Abstract

The invention discloses a desulfurizing tower for gas desulfuration by liquid phase catalytic oxidation. The lower part of the washing segment of a desulfurizing tower is provided with an inlet for gas to be desulfurized, and the upper part of the washing segment of the desulfurizing tower is provided with a doctor solution spraying part. The desulfurizing tower is characterized in that a descending pipeline causing desulfurized gas to pass is arranged along the axis of the washing segment of the desulfurizing tower, and the top of the washing segment of the desulfurizing tower is provided with an entrainment capturing device and is communicated with a horizontal pipeline which can lead the desulfurized gas out of the lower part of the washing segment of the desulfurizing tower. The desulfurizing tower of the invention has simple structure and good stability and is easy to manufacture and install. The structure that sulfurous gas enters or leaves the desulfurizing tower is more reasonable, which is favourable for the even distribution of desulfurized gas which enters or leaves the desulfurizing tower; the entrainment capturing device arranged on the top reduces entrainment, is favourable for lowering tower height and is favourable for reducing the equivalent diameter of the washing segment of the desulfurizing tower so as to bring convenience for reducing amplification effect and improve desulfurizing efficiency; a vertical heavy-calibre gas pipeline which is connected out of the upper part of the washing section is cancelled, namely eccentric load, wind load and the like which are unfavorable for the desulfurizing tower are cancelled.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to a desulfurization tower for desulfurizing gas containing sulfide such as hydrogen sulfide by a liquid-phase catalytic oxidation method. Background technique [0002] In the past, the typical devices for desulfurization of gas containing hydrogen sulfide and other sulfides by liquid-phase catalytic oxidation method include desulfurization tower, liquid seal tank, reaction tank, liquid level regulator, regeneration tower (or use jet regeneration tank instead of regeneration tower) And other equipment, there are many unit operation equipment, large floor area, high project investment, high power consumption, and heavy secondary pollution. [0003] In recent years, a tower-type desulfurization process device has been adopted, that is, a desulfurization regeneration tower integrating desulfurization and regeneration. environmental pollution. [0004] However, whe...

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Problems solved by technology

[0004] However, when the sulfur-containing gas 1 of the desulfurization tower in the prior art enters and exits the desulfurization tower 2, it mostly enters and exits from the side, which is easy to cause the gas entering or leaving the desulfurization tower to have a bias flow, and the gas 3 after desulfurization is likely to be entrained with mist; in order to prevent mist Entrainment If a mist trapping device such as a baffle plate or a wire mesh is installed at the gas outlet, it is easy to block the tower due to the blockage of the mist trapping facility. Otherwise, it is necessary to install a swirl plate mist catcher or Fog trapping devices such as cyclone separators; the beam-type support structure 4 supported by the packing support plate has a large span. For large-diameter desulfurization towers that process large-flow gases, the rigidity and strength of the support structure are high; in desulfurization towers 2 In the process, the desulfurized gas 1 and the desulfurized liquid 5 travel countercurrently in the packing bed 6. Although regular packing is often used, it is still inevitable that the descending liquid in the packing layer will have bias flow, stream flow, wall flow and other amplification effects, which will affect the Desulfurization efficiency, especially the amplification effect of large-diameter desulfurization towers; it is unreasonable to arrange the liquid seal device 7 at the bottom of the desulfurization tower on the bottom side of the tower, because the non-cylindrical baffles 8 and 9 structures are prone to deformation; The upper part of the washing section is connected to the large-diameter gas pipeline 10 from top to bottom, which creates unfavorable eccentric loads and wind loads on the desulfurization tower.

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