SCR脫硝即選擇性催化復(fù)原技術(shù)，是指在催化劑的作用和在氧氣存在條件下，NH3優(yōu)先和NOx發(fā)作復(fù)原脫除反響，生成氮?dú)夂退?/div>
SCR denitration, namely selective catalytic reduction technology, refers to the reduction and removal reaction of NH3 with NOx preferentially under the action of catalyst and the presence of oxygen to generate nitrogen and water.
SCR脫硝的反響中心是脫硝催化劑，SCR催化壽命約為3-5年，2014年我國(guó)燃煤電廠開(kāi)端大范圍啟用SCR催化劑達(dá)成脫硝目的，隨著SCR脫硝系統(tǒng)在全國(guó)范圍內(nèi)火電和非電范疇催化劑運(yùn)用量的遞增，從今年往后的1-2年，我國(guó)將有大量脫硝催化劑面臨報(bào)廢。預(yù)測(cè)以為，到2025年脫硝催化劑廢棄量將到達(dá)40.01萬(wàn)立方米，年報(bào)廢量到達(dá)20萬(wàn)噸。
The reaction core of SCR denitration is the denitration catalyst. The service life of SCR catalyst is about 3-5 years. In 2014, China's coal-fired power plants began to use SCR catalyst on a large scale to achieve the denitration goal. With the increasing use of SCR denitration system catalyst in thermal power and non electric fields nationwide, a large number of denitration catalysts will be scrapped in China in the next 1-2 years from this year. It is predicted that by 2025, the waste volume of denitration catalyst will reach 40100 cubic meters, and the annual waste volume will reach 200000 tons.
SCR催化劑一旦到達(dá)運(yùn)用壽命，因其自身組成而被定義為風(fēng)險(xiǎn)固廢，而此前企業(yè)的處置辦法大多為填埋或無(wú)害化處置等，對(duì)環(huán)境仍有一定的毀壞，對(duì)資源也是糜費(fèi)。
Once the service life of SCR catalyst is reached, it is defined as hazardous solid waste due to its own composition. Before, most of the treatment methods of enterprises were landfill or harmless treatment, which still has a certain damage to the environment and a waste of resources.
隨著新固廢法的實(shí)行，迫切請(qǐng)求開(kāi)展脫硝催化劑再生技術(shù)，將來(lái)脫硝催化劑再生將愈加向資源化的方向轉(zhuǎn)變，從傳統(tǒng)的資源開(kāi)采、生成、運(yùn)用、報(bào)廢的線(xiàn)性工藝，逐漸轉(zhuǎn)變?yōu)樾麓呋瘎┫M(fèi)、再生、回收的循環(huán)工藝，完成原料再應(yīng)用。另外，脫硝技術(shù)也將更多的應(yīng)用大數(shù)據(jù)、人工智能等技術(shù)完成智能化脫硝，愈加精準(zhǔn)地對(duì)過(guò)程完成管控，以至可以開(kāi)發(fā)除塵、脫硫、脫硝等一體技術(shù)。
With the implementation of the new solid waste method, it is urgent to develop the regeneration technology of denitration catalyst. In the future, the regeneration of denitration catalyst will change to the direction of resource utilization, from the traditional linear process of resource exploitation, generation, use and scrapping to the recycling process of new catalyst production, regeneration and recovery, so as to realize the reuse of raw materials. In addition, denitration technology will also make more use of big data, artificial intelligence and other technologies to realize intelligent denitration, control the process more accurately, and even develop integrated technologies such as dust removal, desulfurization and denitration.
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