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Mass transfer enhancing high-efficiency desulfurization absorption tower

A desulfurization absorption tower, high-efficiency technology, applied in chemical instruments and methods, using liquid separation agents, combined devices, etc., can solve the problems of plate resistance, surface tension changes, low pollutant removal efficiency, and unsatisfactory desulfurization efficiency, etc. problems, to achieve the effect of improving the uniformity of liquid holding, reducing liquid leakage and smoke escape, and improving the uniformity of gas-liquid distribution

Inactive Publication Date: 2015-07-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if it is directly applied to the wet flue gas desulfurization system, due to the change of mass transfer absorption liquid and flue gas flow rate, it will lead to changes in plate resistance, surface tension, etc. In addition, it is also limited by the operating elastic range, which may easily cause liquid leakage. , solid blockage, liquid flooding, excessive system resistance or low pollutant removal efficiency, etc.
With the improvement of my country's environmental protection standards, the conventional traditional desulfurization system is difficult to meet the increasingly stringent emission requirements due to the desulfurization efficiency. It is necessary to develop a more economical and efficient desulfurization system to meet the needs of existing thermal power plant emission standards or even higher emission standards.

Method used

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  • Mass transfer enhancing high-efficiency desulfurization absorption tower
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Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 2 As shown, the enhanced mass transfer and high-efficiency desulfurization absorption tower of the present invention includes a tower body 2, the tower body adopts an empty tower type spray tower structure, a flue gas inlet 1 and a flue gas outlet 6 are arranged on the tower body, and a spray layer 3 is arranged in the tower body , the demister 4 and the aeration pipe 5 arranged at the bottom of the tower body, the spray layer 3 of the desulfurization absorption tower includes 3 spray layers, the flue gas inlet 1 is arranged below the spray layer 3, and the flue gas outlet 6 is located at the desulfurization The top of the absorption tower; the demister 4 is installed between the upper spray layer 3 and the flue gas outlet 6 of the desulfurization absorption tower; a gas-liquid redistribution strengthening ring 7 and a Layer sieve plate 8. The sieve plate is located under the bottom spray layer, and the gas-liquid redistribution reinforcing ring is loca...

Embodiment 2

[0045] Such as image 3 The structure of the enhanced mass transfer and high-efficiency desulfurization absorption tower shown is the same as that of Example 1, except that two layers of sieve plates 8 are installed between the flue gas inlet 1 and the spray layer 3 . The upper end surface of the gas-liquid redistribution reinforcing ring forms an included angle of 15° with the horizontal direction ( Figure 11 α1 in the center), the lower end surface forms an angle of 20° with the horizontal direction ( Figure 11 in α2).

[0046] At this time, when the original flue gas SO 2 Concentration not exceeding 6000mg / Nm 3 , using a 3-layer spraying enhanced mass transfer and high-efficiency desulfurization absorption tower, which can realize SO 2 The emission concentration is lower than 35mg / Nm 3 .

Embodiment 3

[0048] Such as Figure 4 The structure of the enhanced mass transfer and high-efficiency desulfurization absorption tower shown is the same as that of Example 1, except that a layer of sieve plate 8 is installed between the flue gas inlet 1 and the spray layer 3, and the bottom spray layer and the middle spray layer A layer of sieve plate is installed between the layers. The upper end surface of the gas-liquid redistribution reinforcing ring forms an included angle of 5° with the horizontal direction, and the lower end surface forms an included angle of 15° with the horizontal direction.

[0049] At this time, when the original flue gas SO 2 Concentration not exceeding 6000mg / Nm 3 , using a 3-layer spraying enhanced mass transfer and high-efficiency desulfurization absorption tower, which can realize SO 2 The emission concentration is lower than 35mg / Nm 3 .

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Abstract

The invention relates to a mass transfer enhancing high-efficiency desulfurization absorption tower comprising a tower body; the tower body is provided with a flue gas inlet and a flue gas outlet, the tower body is internally provided with spray layers, a mist eliminator and an aerator pipe, the tower body is internally provided with at least one layer of sieve plate, the internal wall of the tower body is also provided with a gas-liquid reditribution reinforcement ring, and the gas-liquid reditribution reinforcement ring is located below the sieve plate and above the flue gas inlet. A function of the non-overflow sieve plate comprises that a liquid holding layer with stable height can be formed above the sieve plate and has the effects of improving gas-liquid distribution uniformity in the desulfurization absorption tower and enhancing the gas-liquid mass transfer effect; the gas-liquid reditribution reinforcement ring has the functions of improving flow field uniformity, preventing side wall flue gas from escaping and improving the gas-liquid contact area; through scientific combination of the sieve plate and the gas-liquid reditribution reinforcement ring, the gas-liquid mass transfer effect in the absorption tower can be effectively enhanced, the removal efficiency of SO2 pollutants is improved, the desulfurization efficiency can reach more than 99%, and the requirement of SO2 ultra-low emission is met.

Description

technical field [0001] The invention relates to an enhanced mass transfer and high-efficiency desulfurization absorption tower, belonging to flue gas SO 2 Pollutant control technology field. Background technique [0002] The newly promulgated GB13223-2011 "Emission Standards of Air Pollutants for Thermal Power Plants" issued by the Ministry of Environmental Protection has adjusted the emission limits of air pollutants. Newly built, rebuilt and expanded coal-fired thermal power boilers will implement 100mg / Nm 3 SO 2 emission concentration limit, while for key areas SO 2 Emission limit is 50mg / Nm 3 ; Some areas with serious environmental pollution even need to implement stricter emission standards, that is, to meet the limit requirements of natural gas gas turbine emission standards. [0003] The typical feature of the existing wet flue gas desulfurization empty-tower spray tower is that it contains SO 2 The flue gas of pollutants enters from the lower part of the spray t...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D53/68B01D47/06B01D50/00
Inventor 高翔郑成航骆仲泱倪明江岑可法张军李存杰施正伦周劲松方梦祥程乐鸣王勤辉王树荣余春江
Owner ZHEJIANG UNIV
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