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碳质材料吸附法优势特点介绍

来源:http://www.yinyehuanbao.com     发布时间:2021-01-29   浏览次数:

(1)低温下脱硫率高(98%),脱氮率高(80%);
(1) At low temperature, the desulfurization rate is high (98%), and the denitrification rate is high (80%);
(2)烟气经处理后排放前不需加热;
(2) After treatment, the flue gas does not need to be heated before discharge;
(3)不用水,无二次污染;
(3) No water, no secondary pollution;
(4)吸附剂来源广泛,无中毒问题,只需补充耗尽部分;湿法脱除难脱除的SO2;
(4) The adsorbent has a wide range of sources, no poisoning problem, and only need to supplement the depleted part;
(5)脱除的SO2对废气中的HF、HCl、砷、汞等污染物进行深度处理是一项深部处理技术。具有除尘功能,出口排尘浓度小于10mg/m3。可回收高纯硫、浓硫酸、化肥等副产品,建设成本低,运行成本经济,占地面积小。
(5) The advanced treatment of HF, HCl, arsenic, mercury and other pollutants in waste gas by SO2 removal is a deep treatment technology. With dust removal function, the dust concentration at the outlet is less than 10mg / m3. It can recover high-purity sulfur, concentrated sulfuric acid, chemical fertilizer and other by-products with low construction cost, economic operation cost and small floor area.
活性炭纤维脱硫脱氮新工艺。制备出直径约为20μm的纤维状活性炭,大大增加了活性炭的吸附面积,提高了活性炭的吸附性能和催化性能。开发后,该技术的脱硫脱氮率可达90%。
A new process of desulfurization and denitrification with activated carbon fiber. Fibrous activated carbon with diameter of about 20 μ m was prepared, which greatly increased the adsorption area of activated carbon and improved the adsorption and catalytic performance of activated carbon. After development, the desulfurization and denitrification rate of this technology can reach 90%.
将活性炭吸附技术与微波技术相结合,提出了一种微波催化还原脱硫脱氮技术。该工艺采用活性炭作为氮氧化物载体,微波诱导法脱硫脱氮率可达90%以上。
催化燃烧设备
A microwave catalytic reduction desulfurization and denitrification technology was proposed by combining activated carbon adsorption technology with microwave technology. In this process, activated carbon is used as the carrier of nitrogen oxides, and the desulfurization and denitrification rate can reach more than 90% by microwave induction.
该方法的吸附剂是通过喷涂r-氧化铝作为载体,用碱或碱组分盐溶液喷射载体,然后加热和干燥浸泡的吸附剂以除去残留的水分来制备的。吸附剂在吸附和饱和后可以再生。再生过程是将吸附剂饱和吸附剂送至加热器,通过在约600℃的温度下加热释放NOx,然后将NOx循环送回锅炉的燃烧器。燃烧器中的NOx浓度达到稳定状态并形成化学平衡。这将不会产生nox且仅产生n2,从而抑制nox产生。当还原气体加入再生器时,产生高浓度的so2和h2s混合气体,并且Claus工艺可用于硫回收。
The adsorbent is prepared by spraying r-alumina as the carrier, spraying the carrier with alkali or alkali salt solution, then heating and drying the soaked adsorbent to remove the residual water. The adsorbent can be regenerated after adsorption and saturation. The regeneration process is to send the saturated adsorbent to the heater, release NOx by heating at about 600 ℃, and then recycle NOx back to the burner of the boiler. The NOx concentration in the burner reaches a stable state and forms a chemical equilibrium. This will not produce NO x, but only produce N2, thus inhibiting NO x production. When the reducing gas is added into the regenerator, the mixture of SO2 and H2S with high concentration is produced, and Claus process can be used for sulfur recovery.
CuO吸附脱硫脱硝工艺采用吸附剂进行脱硫脱硝,整个反应分为两个步骤:1)在吸附剂中,吸附剂在300~450的温度范围内与二氧化硫反应生成CuSO4;由于CuO和CuSO4对NH3还原具有很高的催化活性。氮氧化物,结合SCR法进行反硝化。2)再生器中:吸收饱和后产生的Cuso_4送再生器再生。再生过程通常会被h_2或ch_4减少。通过克劳斯装置回收再生的二氧化硫,制酸。在吸附剂处理装置中,还原铜或铜被烟气或空气氧化成氧化铜,生成的氧化铜再用于吸收和还原过程。该工艺可达到90%以上的二氧化硫去除率和75%-80%以上的氮氧化物去除率。
CuO adsorption desulfurization and denitrification process uses adsorbent for desulfurization and denitrification, the whole reaction is divided into two steps: 1) in the adsorbent, the adsorbent reacts with sulfur dioxide in the temperature range of 300 ~ 450 to produce CuSO4; because CuO and CuSO4 have high catalytic activity for NH3 reduction. Nitrogen oxides, combined with SCR process for denitrification. 2) In regenerator: absorption of CuSO after saturation_ 4 send to regenerator for regeneration. The regeneration process is usually controlled by H_ 2 or CH_ 4. The regenerated sulfur dioxide is recovered by Claus unit to produce acid. In the adsorbent treatment unit, reduced copper or copper is oxidized into copper oxide by flue gas or air, and the generated copper oxide is used for absorption and reduction process. The process can achieve more than 90% sulfur dioxide removal rate and 75% - 80% nitrogen oxide removal rate.
吸附法反应温度高,需要加热装置,吸附剂的制备成本高。随着研究的发展,活性炭/碳(Ac)与CuO的结合方法逐渐发展起来。将这两种方法相结合,可以制备出活性温度合适的催化剂,克服了Ac使用温度低、CuO/Al2O3活性温度高的缺点。
The reaction temperature of adsorption method is high, heating device is needed, and the preparation cost of adsorbent is high. With the development of research, the combination method of activated carbon / carbon (AC) and CuO is gradually developed. By combining the two methods, the catalyst with suitable activity temperature can be prepared, which overcomes the disadvantages of low AC application temperature and high CuO / Al2O3 activity temperature.

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