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Plant purification method for reducing SO2 concentration in air of industrial area

A plant purification and SO2 technology, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve problems such as environmental pollution, and achieve the effects of low operating costs, high absorption and enrichment, and low investment and maintenance costs.

Inactive Publication Date: 2010-04-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, sulfur dioxide will be released in the process of non-ferrous metal dressing and smelting, causing environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The concentration of sulfur dioxide in the atmosphere around a smelter ranges from 0.2 to 3 mg / m 3 about. Plant oleander and sycamore in rows around the factory area as street trees. Auxiliary watering foliage fertilizer, its main component is a liquid fertilizer composed of ammonium bicarbonate and potassium dihydrogen phosphate mixed with water, which can promote its survival, strengthen photosynthesis, and increase plant biomass by prolonging the life of leaves. Harvest the leaves that fall off naturally at any time, and harvest them at one time after the leaves fall in autumn. After analysis and determination, the range of sulfur dioxide concentration in the atmosphere is reduced to 0.1-1.3mg / m 3 , while the atmospheric sulfur dioxide concentration in the adjacent area without plants is still 0.2-2.6mg / m 3 , which is equivalent to reducing the sulfur dioxide content in the atmosphere by 50%. In addition, the sulfur content in the body of oleander and sycamore pla...

Embodiment 2

[0030] The annual average concentration of sulfur dioxide in the atmosphere around a smelter is 2mg / m 3 about. Gardenia shrubs and grasses are planted in large open spaces in and around the factory area, and oleander, sycamore and weeping willow are interspersed with each other. During the planting period, loosen and plow the substrate every half a month, and properly introduce animals such as earthworms to loosen the substrate. Followed by spraying and watering to wash the excessive dust on the surface of the leaves to increase the photosynthesis of plants and the ability to absorb sulfur dioxide. In addition, increase the aeration and water permeability of the soil, increase the redox potential of the soil, so as to promote the sulfur dioxide dust to form sulfate in the soil and move to the soil solution, and accelerate the absorption and accumulation of sulfur by plants. Sulfides will become unstable and easily oxidized, which is conducive to the uptake of sulfate by plan...

Embodiment 3

[0032] The average content of sulfur dioxide in the atmosphere around a thermal power plant is 3.5mg / m 3 . Plant saplings of sycamore and oleander about 20-50cm high along both sides of the road at intervals of about 200cm, and transplant the seedlings of the following plants in a large area such as a dump site, including sycamore, weeping willow, oleander and Gardenia etc. Fertilize moderately every other month and water as needed. And the introduction of microbial preparations can increase the amount of symbiotic fungi in the roots of Platanus and oleander, which is beneficial to the improvement of the rhizosphere environment and the absorption and accumulation of sulfur dioxide by photosynthesis. And after 5 months, cut the branches for the first time to harvest part of the branches and leaves, and then harvest all the leaves before the leaves of the plane tree turn yellow and fall off, and cut off the large branches to promote the germination of new branches in the secon...

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Abstract

The invention discloses a plant purification method for reducing SO2 concentration in air of an industrial area, which comprises the following process steps: planting one or a combination of oleanders, sycamores and weeping willows serving as roadside tree species at intervals of between 150 and 200 cm in plant areas and peripheral regions, performing lawn planting on Lucerne, gardenias, China roses in a hunk of space areas or planting the combination of the Lucerne, the gardenias, the China roses into a lawn, planting the oleanders, the sycamores and the weeping willows alternately for matching, and planting small trees among the plants sporadically; loosening and ploughing a ground substance at intervals of half a month during planting, appropriately introducing animals, such as earthworms and the like to loosen the ground substance, spraying and washing the dust on leaves of the planted plants, adding biological growth promoters into the plants or inoculating part of mycorrhiza organisms, watering fertilizers of leaf surfaces supplementarily, and harvesting the leaves shed naturally at any time. The plant purification method has the characteristics of no secondary pollution to environment and high absorption enrichment amount of the sulfur dioxide, soil and water loss prevention and control, environment beautification and the like.

Description

technical field [0001] The invention relates to environmental protection, in particular to reducing SO in the air in industrial areas of smelters 2 concentration of plant purification methods. Background technique [0002] Sulfur dioxide is a gaseous pollutant with a relatively large content and a wide range of influences in the current air pollutants. It mainly comes from the combustion process of fossil fuels (coal, oil, and natural gas), as well as the roasting and smelting of sulfide ores. According to the polluting industrial sectors, the order is thermal power plants, chemical plants, and smelters. Waste gas from non-ferrous metal smelters, SO 2 The content is 1%~12% (volume); boiler exhaust gas, SO 2 The content is 0.05% to 0.5% (volume). [0003] low concentration SO 2 Smoke is one of the main gases that cause air pollution. At present, some power plants, smelters, coking plants, and oil refineries discharge flue gas with a sulfur dioxide content of 0.3%-1%, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/50
CPCY02A50/20
Inventor 宁平王海娟瞿广飞
Owner KUNMING UNIV OF SCI & TECH
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