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Multistage spray absorbing device with high efficiency

An absorption device and high-efficiency technology, applied in the field of multi-stage spray high-efficiency absorption devices, can solve the problems of high energy consumption, high investment and operating costs, scaling and clogging, etc.

Active Publication Date: 2013-06-26
JIANGSU LANSHAN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently widely used limestone / lime-gypsum wet spray desulfurization process, the absorbent limestone / lime and SO in the flue gas 2 Calcium sulfite and calcium sulfate liquid, the products of the reaction, are prone to saturated crystallization, and a large amount of supersaturated slurry is easy to deposit in the tower, causing scaling and blockage, making the limestone / (lime)-gypsum flue gas wet spray desulfurization device mostly desulfurization efficiency Low energy consumption, large equipment, high investment and operating costs

Method used

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  • Multistage spray absorbing device with high efficiency
  • Multistage spray absorbing device with high efficiency
  • Multistage spray absorbing device with high efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as figure 1 and Figure 5 As shown, the absorption tower 1 of the absorption device is provided with a raw gas inlet pipe 3, a slurry pool 8 at the bottom of the tower, a net gas outlet at the top of the tower, and a cooling water nozzle 4 is installed at the mouth of the raw gas inlet pipe 3. The tower body of the absorption tower 1 is composed of multiple stages, and each stage is separated by a tower-level partition plate 2; two adjacent stages are connected by a U-shaped gas conduit 5; Figure 5 It is a cross-sectional view of the outlet section of the U-shaped gas conduit of a certain tower body. It can be seen in the figure that the direction of the nozzle of the U-shaped gas conduit 5 deviates from the diameter direction of the tower body θ Each absorbent nozzle 6 is arranged at the outlet of each U-shaped gas conduit 5 . The direction of the gas in the U-shaped gas conduit 5 deviates from the direction of the tower end nozzle to the other side ...

Embodiment 2

[0029] Embodiment 2: basically the same as Embodiment 1, as figure 2 As shown, this embodiment is also provided with a slurry pool 9 outside the tower. Slightly different from Example 1, the included angle of the inlet section of the gas conduit in this example relative to the horizontal plane α It varies between 0° and 75°, and the nozzle of the original gas inlet pipe 3 is not provided with a cooling water nozzle 4 .

Embodiment 3

[0030] Embodiment 3: substantially the same as Embodiment 1, as image 3 shown. Slightly different from Embodiment 1, this embodiment does not have a slurry tank 9 outside the tower, and each absorbent nozzle 6 is arranged at the inlet and outlet of each U-shaped gas conduit 5, and the mouth of the original gas inlet pipe 3 is not provided with cooling. Water nozzle 4.

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Abstract

The invention relates to a multistage spray absorption device with high efficiency, which comprises an absorbing tower, an original gas inlet pipe provided at the tower body, a slurry pond at the tower bottom and a gas outlet on the tower top. The present invention is characterized in that the tower body is a multistage tower divided into an upper part and a lower part; a plurality of gas conduits between each stage which are distributed along the circumferential wall of the tower body are communicated; a plurality of absorbent nozzles are provided in each tower body. Gas from each stage is penetrated through the absorbent spray zone formed by the nozzles and forms a spiral air-flow with a certain rotary strength, gas / liquid double phases form a state of high turbulence, multi-whirlpool, great interphase relative speed, the retention time of gas is long, gas and liquid are fully contacted, the total reaction efficiency can exceed 99%, and the liquid-gas ratio of each stage can decrease to 1-3L / Nm<3>, so that the energy consumption for conveying liquid can be greatly saved. The invention is especially suitable for the equipment of flue gas desulphurization by a wet method.

Description

technical field [0001] The invention relates to a multi-stage spraying high-efficiency absorption device, which belongs to the field of chemical gas-liquid two-phase mass transfer and heat transfer, and is especially suitable for flue gas wet desulfurization equipment. Background technique [0002] At present, chemical towers are mainly plate towers and packed towers, which are used for close contact between gas-liquid or liquid-liquid two phases to achieve the purpose of mass transfer and heat transfer between phases, and can be used for rectification, absorption, desorption and Extraction etc. The existing packed tower has the advantages of high efficiency, large flow rate, and corrosion resistance, but has the disadvantages of large resistance, easy scaling and blockage, and high engineering cost; the plate tower has the advantages of small resistance, not easy to block, and convenient cleaning, but has the advantages of high efficiency Low, not corrosion-resistant and o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 黄盛珠凌斌聂江宁
Owner JIANGSU LANSHAN ENVIRONMENT TECH