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Zero water consumption wet process desulfurization device and desulfurization process thereof

A technology of wet desulfurization and desulfurization process, applied in separation methods, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as air pollution, misunderstanding of white plume visual effects, etc., to reduce water costs for enterprises and improve coordination Governance level, to achieve the effect of deep purification

Pending Publication Date: 2018-12-11
杭州蕴泽环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the previous gypsum rain treatment, although these acid-containing water vapors will not fall in the form of liquid droplets (gypsum) rain, these water vapors with relatively high acidity will still objectively pollute the atmosphere to a certain extent, while the white smoke Feather's visuals can also cause public misunderstanding

Method used

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  • Zero water consumption wet process desulfurization device and desulfurization process thereof
  • Zero water consumption wet process desulfurization device and desulfurization process thereof

Examples

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Effect test

Embodiment 2

[0035] Embodiment 2: refer to figure 1 . A desulfurization process of a zero-water consumption wet desulfurization device, comprising the following process steps:

[0036] 1) After the original flue gas enters the desulfurization tower 1, it performs a reverse contact reaction with the desulfurization liquid sprayed from the desulfurization spray layer 2, and removes most of the acid gases such as SO2, HF, HCl and dust particles in the original flue gas, and the flue gas cools down. to 50°C-60°C and reach saturation;

[0037] 2) After desulfurization, the high-humidity saturated flue gas passes through the liquid accumulation layer 3 upwards, and conducts reverse contact and heat exchange with the condensate sprayed from the cooling spray layer 4, and the temperature of the flue gas drops to 30°C-45°C. Most of the water vapor and residual acid gas condense into liquid droplets with slurry droplets, soluble salt droplets, and ultrafine dust particles as condensation nuclei; ...

Embodiment 3

[0044] A thermal power unit, a 300WM flue gas desulfurization renovation project adopts this process, the SO2 concentration in the inlet flue gas is 2338mg / m3, the dust concentration in the inlet flue gas is 28mg / m3, and the liquid-gas ratio of the cooling spray layer circulating fluid is 3L / Nm3, the coverage rate of the spray layer is 300%, the gas-liquid contact time is 1.3s, the flue gas cooling range is 15°C; the preparation pressure of the nozzle of the flushing layer of the demister is 0.20MPa, and the flushing liquid-gas ratio is 0.5L / Nm3, The cooling range of the flue gas is 3.2°C; the pH of the effluent is 8.2; the sedimentation area of ​​the packing layer 5 is an inclined tube packing with a diameter of 35mm, and the flow rate of the inlet water distribution pipe is 0.2m / s. The water pipeline is 1.1m away from the top of the packing layer, and the vertical flow velocity in the sedimentation area is 0.2mm / s. The concentration of SO2 in the outlet flue gas is 3.3mg / m3,...

Embodiment 4

[0046] A thermal power unit, a 135WM unit flue gas desulfurization reconstruction project adopts this process, the SO2 concentration in the inlet flue gas is 1879mg / m3, the dust concentration in the inlet flue gas is 22mg / m3, and the liquid-gas ratio of the cooling spray layer circulating fluid is 2.8L / Nm3, the coverage rate of the spray layer is 300%, the gas-liquid contact time is 1.2s, the temperature drop of the flue gas is 17℃; the preparation pressure of the nozzle of the flushing layer of the demister is 0.20MPa, and the ratio of flushing liquid to gas is 0.6L / Nm3 , the cooling range of the flue gas is 2.7°C; the pH of the effluent is 8.5; the sedimentation area of ​​the packing layer 5 is an inclined tube packing with a diameter of 35mm, the flow rate of the inlet water distribution pipe is 0.2m / s, the distance between the inlet water distribution pipe and the bottom of the packing layer is 0.8m, and the top The outlet pipe is 1.0m away from the top of the packing layer...

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Abstract

The invention discloses a zero water consumption wet process desulfurization device and a desulfurization process thereof. The desulfurization device comprises a desulfurization tower, wherein at least one desulfurization spraying layer, a temperature reduction liquid accumulation layer, a temperature lowering spraying layer, a demister flushing layer and a demister dewatering layer are sequentially distributed and arranged in the desulfurization tower from bottom to top; a coagulating pool, a regulating pool, a temperature lowering clarifying pool, a clean water pool and a temperature lowering spraying pump are arranged outside the desulfurization tower; a slurry pool is arranged under the desulfurization spraying layer in the desulfurization tower; a smoke inlet is formed in the tower wall of the desulfurization tower between the slurry pool and the desulfurization spraying layer; a smoke discharge opening is formed in one side of the top of the desulfurization tower. The temperatureof the smoke gas is lowered; the desulfurized smoke gas is subjected to condensation, temperature lowering and water collection, and the recovered water is treated and reused, so that the zero waterconsumption of the desulfurization system is realized; meanwhile, the circulation condensing liquid is subjected to tempering; the treatment volume of the circulation liquid on acidic gas is improved;the multi-contaminant deep purification is realized; the near-zero discharging is reached; the cooperated control level of multiple contaminants of high-humidity smoke gas is greatly improved.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and environmental protection, in particular to a zero-water consumption wet desulfurization device and a desulfurization process thereof. Background technique [0002] Coal-fired power generation is the main form of power generation in my country. As of now, the installed capacity of coal-fired power generation accounts for 59% of the total installed capacity of power generation in China, and the power generation of coal-fired power plants accounts for 67.9% of the total power generation in the country. , accounting for about 42% of the country's total coal consumption. As a large water and energy consumer, the huge water resources and energy consumption make coal-fired power stations the focus of energy conservation and emission reduction. my country's 2005-2020 electric power development plan clearly puts forward the issue of power generation and water conservation, and efforts must b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/80B01D53/40B01D53/96B01D53/00B01D53/26C02F9/04C02F103/18
CPCB01D53/002B01D53/26B01D53/40B01D53/75B01D53/80B01D53/96C02F1/52C02F1/5281C02F1/66C02F2103/18B01D2257/302B01D2257/2045B01D2257/2047B01D2258/0283
Inventor 张荣程磊俞钱永关向军
Owner 杭州蕴泽环境科技有限公司
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