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Directly ventilated type flue gas adverse current cleaning treatment method

A purification treatment and flue gas purification technology, applied in the fields of electric power, environmental protection, chemical industry, and metallurgy, can solve problems such as the production impact of units or boilers or sintering machines, the difficulty of updating anti-corrosion materials, and the long construction period.

Inactive Publication Date: 2008-10-08
娄爱娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For new units, the enhanced anti-corrosion will greatly prolong the construction period, and the enhanced anti-corrosion will increase the cost of chimney construction, and it will be very difficult to maintain and update anti-corrosion materials
For old factories, if a new anti-corrosion treatment is carried out on the original chimney, the construction will be difficult and the construction period will be long. More importantly, it will have a great impact on the production of the unit, boiler or sintering machine, and it lacks application value in practice.

Method used

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  • Directly ventilated type flue gas adverse current cleaning treatment method
  • Directly ventilated type flue gas adverse current cleaning treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 1 , the flue gas purification and discharge integrated purification treatment tower of the utility model is a cylindrical or square tower, comprising: a tower body (1); a bubbling section (2 ), the bubbling section (2) is provided with an air distributor and a side inlet shaft agitator; the flue gas inlet (3) is arranged in the middle or lower part of the tower body (1); it is arranged in the middle and upper part of the tower body (1) The spray section (4) located in the tower body is provided with a gas distributor, a multi-stage absorption liquid sprayer and a liquid wall flow stop ring in the spray section (4); the upper part of the tower body (1) is arranged to be located in the tower body The packing section (5) of the packing section (5) is provided with two sections of packing, and a sprinkler is arranged above each section of packing; the outlet for purifying flue gas (6) is arranged on the top of the tower body (1); Above the flue gas outlet (6) an...

Embodiment 2

[0046] A kind of direct exhaust countercurrent purification treatment containing SO 2 For fumes of noxious gases, see figure 2 , the specific process design is as follows:

[0047] Blast equipment (30) puts SO 2 (content is 800mg / Nm 3 ), and the original flue gas with a temperature of 130° C. is blown from the flue gas inlet (3) into the purification treatment tower (10) with integrated purification and emission. The desulfurization raw material is liquefied synthetic ammonia, and the circulating washing and absorbing liquid is ammonium sulfate and ammonium chloride slurry aqueous solution containing ammonium sulfate crystalline solid, and the circulating absorbing liquid also contains fly ash washed from flue gas. Under the action of the circulating pump (40), the washing and absorbing liquid realizes the up and down of the tower body (1) and the inside and outside of the tower body (1) between the bubbling section (2) and the spraying section (4) of the purification trea...

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Abstract

The invention discloses a treatment method for straight-line smoke through inverse-flowing and cleaning. Raw gas enters purifying equipment via a smoke inlet, is inversely contacted with a scrub absorption liquid sprayed from a spray thrower after flowing upwards via a spraying section and has a chemical reaction of gas-liquid mass transfer and liquid phase, thus removing various contaminants. The smoke goes on to enter a packing section upwards from the spraying section, removing the liquid drops brought by the spraying section; the purified smoke passing through the packing section enters a straight-line chimney via a smoke outlet arranged at the top of the purifying equipment and is directly discharged into the atmosphere. The method leads the contaminants in the smoke removed from the purifying equipment, in particular to SO2, to be directly discharged from the straight-line chimney (7) rather than from an original chimney, which avoids the problem in the prior art that the original chimney requires enhancing the corrosion protection.

Description

technical field [0001] The invention relates to an integrated treatment method for direct discharge flue gas countercurrent purification and emission, in particular to a process for recovering sulfur oxides from flue gas, which is applicable to the technical fields of electric power, metallurgy, environmental protection and chemical industry. Background technique [0002] Boilers or power plants that use coal or oil as fuel, or sintering machines in metallurgical plants emit a large amount of flue gas, which is directly discharged to the atmosphere through the chimney. The height of the discharge chimney is between 120 and 250m, and reinforced concrete materials are generally used as the strength shell. Since the flue gas contains acidic gaseous substances such as SOx, NOx, HCl and HF, especially the SO 3 Gas, so that the flue gas exhibits acid dew point corrosion. The acid dew point of the flue gas varies with the SO in the flue gas 3 It increases with the increase of wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60B01D53/68B01D47/06
Inventor 娄爱娟
Owner 娄爱娟