Wet flue gas desulfurization device and method for enhancing gas-liquid mass transfer reaction

A wet flue gas desulfurization and mass reaction technology, applied in chemical instruments and methods, measuring devices, separation methods, etc., can solve the problems of large floor space, high operating cost of desulfurization equipment, and low desulfurization efficiency. Save energy, reduce usage, highly disperse and mix fast results

Active Publication Date: 2019-01-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of the above-mentioned existing production technologies, especially for the current small and medium-sized coal-fired boilers, the applicant provides a wet flue gas desulfurization device and method with a reasonable structure and enhanced gas-liquid mass transfer reaction, so as to solve the problem of desulfurization equipment operation High cost, large floor area, low desulfurization efficiency and failure to meet ultra-low emission standards

Method used

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  • Wet flue gas desulfurization device and method for enhancing gas-liquid mass transfer reaction
  • Wet flue gas desulfurization device and method for enhancing gas-liquid mass transfer reaction
  • Wet flue gas desulfurization device and method for enhancing gas-liquid mass transfer reaction

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Experimental program
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Effect test

Embodiment 1

[0056] Using air compressor and SO 2 Gas cylinders (pure SO2, purity 99.99%) pass the flow ratio of the two to obtain different SO 2 Concentration of simulated flue gas;

[0057] Structural parameters: the diameter of the cutting blade mounting rod of the static spiral cutter 9 is 25 mm, and the compression index is 0.5;

[0058] Process parameters: desulfurizer mass fraction 20wt%, flue gas flow rate 18Nm 3 / h, under the condition that the desulfurizer circulation flow rate is 300mL / min 2 The mass concentration is 1860-6440mg / m 3 The flue gas is treated, and the SO of the flue gas after the reaction 2 The concentration is detected online by the flue gas analyzer and the analysis results are given on the display screen. The desulfurization results are as follows: image 3 shown.

[0059] Depend on image 3 It can be seen that when the inlet flue gas SO 2 The mass concentration is lower than 3000mg / m 3 The whole system exhibits excellent desulfurization performance. Th...

Embodiment 2

[0061] Equipped with SO in flue gas 2 The concentration is 2960mg / L;

[0062] Structural parameters: the diameter of the cutting blade mounting rod of the static spiral cutter 9 is 80 mm, and 10 static spiral cutters 9 with a compression ratio of 0.5 are connected in parallel;

[0063] Process parameters: desulfurizer mass fraction 20wt%, flue gas outflow pressure 0.3MPa, flow rate 2100 Nm3 / h, desulfurizer circulation flow rate 30L / min. SO in the flue gas after the reaction of the first-stage spiral cutter 2 With a concentration of 38-50mg / L, the SO in the flue gas after the reaction of the secondary helical cutter (two helical cutters connected in series) 2 The concentration is 18-30mg / L, meeting the standard of ultra-low emission.

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Abstract

The invention relates to a wet flue gas desulfurization device and method for enhancing a gas-liquid mass transfer reaction. The device comprises a gas compressor, an inlet end of the gas compressor is connected to a flue gas conveying pipe, an outlet end of the gas compressor is orderly connected to a gas storage tank and a Venturi jet device, an upper inlet of the Venturi jet device is connectedto a discharge port at the lower end of a desulfurizer liquid storage tank, an outlet end of the Venturi jet device is connected to a static spiral cutter, an outlet of the static spiral cutter is connected to a gas/liquid inlet at the middle of a gas-liquid separation tank, a desulfurizer reflux inlet at the lower part of the gas-liquid separation tank is connected to the top of the desulfurizerliquid storage tank so that desulfurizer circulation is realized, a gas outlet at the upper part of the gas-liquid separation tank is connected to an exhaust gas absorption tank through a pipe, and the device also comprises a flue gas analyzer. The device has high efficiency, saves energy, realizes micro-nanoization and high-dispersion mixing of the desulfurizer droplets under a small liquid-gasratio, finishes the ultra-purification treatment for flue gas desulfurization and realizes miniaturization and economy of flue gas desulfurization equipment.

Description

technical field [0001] The invention relates to the technical field of wet desulfurization equipment, in particular to a wet flue gas desulfurization device and method for strengthening gas-liquid mass transfer reaction. Background technique [0002] China is one of the largest coal producers and consumers in the world, and coal resources have always played an irreplaceable role in my country's energy structure. According to the preliminary accounting of the State Environmental Protection Administration, coal resources accounted for 60.4% of my country's total energy consumption in 2017, a decrease of 1.6 percentage points from 2016, but the total coal consumption is still as high as 4.49 billion tons. As an essential primary energy source, coal has low calorific value, high sulfur content, and large pollutant emissions after combustion. Among them, SO2, as the main pollutant in the atmosphere, is the main substance that causes environmental problems such as acid rain and ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/78B01D53/96G01N33/00
CPCB01D53/50B01D53/78B01D53/96B01D2258/0283G01N33/0042
Inventor 崔政伟赵枫高哲俞建峰崔捷
Owner JIANGNAN UNIV
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