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Direct discharging flue gas treatment method

A flue gas treatment, direct-exhaust technology, applied in the field of recovering sulfur oxides from flue gas and integrated treatment of direct-exhaust flue gas purification and emission, can solve the problem of increased chimney construction costs, lack of application value, and prolonged construction period, etc. question

Inactive Publication Date: 2008-11-19
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 units, 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, this will have a great impact on the production of the unit or boiler, and it lacks application value in practice

Method used

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Examples

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Effect test

Embodiment 1

[0059] see figure 1 , the flue gas purification and emission integrated purification treatment tower proposed by the present invention is a cylindrical or square tower, including:

[0060] The tower body (1); the bubbling section (2) which is arranged in the lower part of the tower body (1) and is located in the tower body, and the bubbling section (2) is provided with an air distributor and a side-inlet shaft agitator; it is arranged on the tower body (1) The flue gas inlet (3) in the middle or middle and lower part; the spray section (4) located in the tower body located in the upper middle part of the tower body (1), and the spray section (4) is provided with a gas distributor. absorbing liquid sprayer and liquid wall flow blocking ring; the packing section (5) located in the tower body on the upper part of the tower body (1) is set, and two sections of packing are arranged in the packing section (5), and each section of packing is arranged with Water sprayer; the outlet o...

Embodiment 2

[0062] A kind of in-line purification treatment containing SO 2 For fumes of noxious gases, see figure 2 , the specific process design is as follows:

[0063] Blast equipment (30) puts SO 2 (content is 1000mg / Nm 3 ), and the boiler 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 treatment tower (10). two ...

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Abstract

The invention relates to a direct discharging type flue gas treatment method, which comprises eight major process steps of flue gas entering, spray washing absorption, circulation of washing absorption liquid, multi-layer spray by parallel connection of sprayers, foam removing of flue gas, direct discharge of the flue gas, oxidation treatment and solid separation. Specifically, the untreated waste gas enters a purification device from a flue gas inlet and goes upward to pass through a spray section, so as to be in counter-flow contact with a washing absorption liquid sprayed downward from the sprayers, and generate the gas-liquid mass transfer and the chemical reaction in liquid phase for removing various pollutants. Flue gas continually goes upward from the spray section to enter a packing section for removing liquid drops brought from the spray section; the purified flue gas after passing through the packing section enters a direct discharging chimney from a flue gas outlet arranged at the top part of the purification device, thereby directly discharging the purified flue gas to the atmosphere from the direct discharging chimney. The direct discharging type flue gas treatment method enables the pollutants in the flue gas in the purification device to be removed, SO2 is particularly and directly discharged from the direct discharging chimney after that, thereby not needing of discharge form the original chimney and greatly improving the purifying treatment efficiency of the flue gas.

Description

technical field [0001] The invention relates to a straight exhaust flue gas purification and emission integrated treatment method, in particular to a process for recovering sulfur oxides from flue gas, and belongs to the technical field of environmental protection chemical industry. Background technique [0002] Tall chimneys have long been a must-have for boilers, power plants or metallurgical plants. Moreover, the construction process of chimneys is very complicated, and maintenance, reinforcement, and reinforcement construction that affect industrial production are generally rejected. For example, thermal power plants that use coal or petroleum as fuel, and sintering machines in iron and steel plants emit a large amount of flue gas, which is directly discharged into 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60B01D53/68B01D47/06
CPCY02A50/20
Inventor 娄爱娟
Owner 娄爱娟