Research on the Research on Colored Smooth Tonor Desein Devinion and Nitrile Research

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Research on the Research on Colored Smooth Tonor Desein Devinion and Nitrile Research

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Abstract: This article is mainly based on the analysis of non -color smelting flue gas and desulfurization and denitration technology. It has considered the content of non -ferrous smelting flue gas and decarnation and denitration technology. The application of non -color smelting flue gas and desulfurization and denitration technology provides a reference.

Foreword

For how to better use the color smelting flue gas and desulfurization and denitrification technology, we need to study more in -depth, think about its actual application and current application requirements, in order to launch better technical methods, improve the overall effect as a whole Essence

1. Overview of technology and advantages of flue gas desulfurization, dehydration, denitration, dust removal and dust removal

1.1 Overview

At this stage, there are a large number of countries that study the integrated technology of flue gas dehydration and denitration, dehydration and dust removal, but the stage of most countries is experimental research, and it takes a long time to make the technology be promoted on a large scale. In traditional desulfurization, denitration, and dust removal technologies, each processing work is separated, and each processing work has a complex process. At the same time, the relevant mechanical removal equipment used is large, whether it is operating costs, or management costs, both It is relatively high, and the management difficulty is relatively large, which leads to the existence of defects, which affects the actual desulfurization, denitration, and dust removal effects, and also limits the promotion and application of these technologies. On the basis of traditional technologies, after a large number of studies, the integrated technology of flue gas desulfurization, dehydration, denitration and dust removal technology is proposed. This technology contains a variety of specific methods, such as pulse electric halo method, activated carbon or activated scorching method. Nitty and dust removal effects are more ideal and more suitable for extensive promotion and application.

1.2 advantage

In the actual use of traditional flue gas desulfurization technology, it can be effectively controlled by SO2 pollution to reduce environmental pollution, but it often wastes sulfur resources, and solid waste will occur during treatment, causing secondary pollution. The integrated technology of flue gas desulfurization, dehydration, and dust removal is based on traditional flue gas desulfurization technology. This technology not only has the advantages of traditional technologies, but also has its own unique advantages. ; Under the low temperature conditions of 110 ° C to 120 ° C, the denitration rate is also relatively high, which can exceed 80%; the abandoned HCI, HF, arsenic, and mercury can be effectively removed to achieve the effect of in -depth treatment; , After applying this technology, it can be removed; with the dust removal function, exported smoke will not exceed 30 mg/nm2; the use of water resources is small, avoid wasting water resources, and the problem of secondary pollution will not occur; The running costs are relatively small; adsorbent poisoning does not occur; high -purity sulfur, sulfuric acid, high -purity liquid SO2 can be recycled; heating operations do not need to be carried out before discharging flue gas. After recycling, after transformation, it becomes hot water to achieve secondary utilization and promote economic benefits.

2. The generation and characteristics of sintering flue gas

The sintering process is a complex physical chemistry process with high temperature combustion as a chemical condition. In this process, first of all, through the combustion response generated by air and mixed materials, the heat released by combustion was used for the energy required for the sintering process, and the flue gas generated by the combustion process was discharged as an exhaust gas. The principle of sintering is through the connection of the chemical bonds between solid particles, which prompts the crystal to gradually grow, thereby effectively reducing the gap between the crystals, increasing the density between particles, and finally forming a dense polycrystalline sintering body. The gas generated in the reaction is sintering flue gas, which can cause severe pollution to the air. The main characteristics of sintering flue gas:

2.1 High temperature

Since the entire sintering process is performed under high temperature conditions, the temperature of the discharged sintering flue gas will be very high. Generally speaking, the temperature of the flue gas after sintering reaction is between 120 ° C and 180 ° C.

2.2 Large emissions

Because the mineral contains a large amount of sulfur and nitrogen elements, most of them exist in the form of compounds, a large amount of gases such as sulfur dioxide will be generated during the combustion process. Although with the gradual completion of the process, the sulfur dioxide in flue gas will gradually decrease, but the overall emissions are still very large.

2.3 Large wet content

Before sintering, it is generally necessary to add water to the burning material to improve the breathability of the material. Therefore, during the sintering process, the smoke generated will have a lot of water, and the moisture content will be large. Generally, the humidity in sintering flue gas is about 15%.

2.4 High dust concentration

Because the main material of the participation of the reaction is minerals, the main component is iron and iron compounds, and some other heavy metal elements. Therefore, during the combustion process, sintering flue gas will contain a large amount of metal elements, that is, a large amount of dust in flue gas.

2.5 Status is unstable

Because sintering flue gas often has the characteristics of high temperature and high emissions during the discharge process, it is easy to cause secondary reactions in the discharge process, which further increases the emissions of harmful gases such as sulfur dioxide. Unstable.

3. Joint desulfurization and denitrification technology

3.1 Carbon material adsorption method

Carbon adsorption materials mainly refer to activated charcoal and activity coke. In fact, the activity coke is similar to the activated carbon system, but the prominent feature of the former is that it is smaller than the surface area, high strength, and unique pore structure. Compared with activated carbon, it has better desulfurization and denitration performance. SO in the smoke, sulfuric acid is generated under the adsorption catalytic action of the active coke microporous; NOX is catalytic to generate water and N2 under the catalytic restore of the active coke under the condition of ammonia. This process is mainly composed of three parts: adsorption, resolution and regeneration. The flue gas first entered the first paragraph of the active focus absorption tower. The S02 was removed here. When the Ⅱ of the absorption tower was flowed, the ammonia was sprayed to remove NOX.

3.2Cuo adsorption method

The CUO absorption reduction method generally uses a load type CUO as an absorbent, and the common ones are CUO/Al2O3. The processed process of this method is: Inject an appropriate amount of NH3 in the flue gas, when the mixed flue gas is filled with the bed layer of the CU0/Al2O3 absorbent, the CUO and SO2 will react to generate CUSO4 in the oxidative atmosphere, and CUSO4 And CUO has a high catalytic activity for the selection of ammonia. The absorbent after absorption is sent to the regeneration, and the regeneration SO2 can be recycled through the CLAUS device. The advantage of the CUO/Al2O3 method is that it can be combined with desulfurization and denitration, without producing dry or wet waste residues without secondary pollution. This process can reach more than 90%of the SO2 removal rate and 75%-80%NOX removal rate. However, after a long -term operation, the surface of the absorbent will decrease due to aluminum alumina sulfate. After many cycles, it will lose its effect. This is the main reason why there is still no industrialized report so far.

3.3 Electronic beam method

Electronic beam shooting method is a type developed by the development of electronic beams (800KEV-1MEV) developed in the 1970s to illuminate flue gas, removes SO2 and NOX in flue gas and eventually converted into ammonium sulfate and ammonium nitrate. The smoke removal technology has good adaptability to the conditions of flue gas, and by -products can be used as chemical fertilizer. The electronic beam radiation method greatly reduces the energy required for the oxidation process during the removal of the flue gas, which can reduce the conditions of the oxidation reaction, and the wastewater and waste residue will not be generated after the reaction. The desulfurization and denitration rates are above 80%and 18%, respectively.

3.4 Pulse electric halo method

The pulse electrical dizziness is the discharge bipolar with high voltage, so that the gas medium near the electrode is discharged by local breakdown, thereby obtaining non -thermal balance plasma. There are a large amount of high -energy active particles inside non -thermal balance plasma, which can promote some chemical reactions that are difficult to perform under normal conditions, and make the removal of flue gas pollutants. In recent years, the technology has made great progress. Zhao Junke and others conducted a research device for the processing device of a pulse electromotive electro-dizziness of a vein electromotine of 12,000-20000nm/pH. About 85%and 50%, respectively.

3.5 Metal oxide catalytic method

The metal oxide catalytic method is a flue gas desulfurization and denitration process under the action of metal oxide catalysts. The existing catalysts include CUO and Al2O3. New catalysts are also continuously tested. Liang Junfang and others have studied the heating and reduction process of SNO2-TIO2, which catalyzed the integrated desulfurization and denitration, and did not catalyze the SNO2 and TIO2 alone. Xu Yunlong and others studied the performance of the V2O5/TIO2 SO2 and NOX in the simultaneous removal of the flue gas. The results showed that the V2O5/TIO2 catalyst can improve the desulfurization and denitration activity. ℃.

4 Conclusion

In summary, in order to ensure the application effect of non -color smelting flue gas and decarcus denitration technology at the same time, this article summarizes the specific methods of color smelting flue gas and desulfurization and denitration technology, as well as some key measures. Reference reference for denitration technology.

有色冶炼烟气脱硫脱硝技术研究

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