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　　在煤化工产业中，爱游戏app全站登录作为煤焦油深加工的核心产物，既是制造染料中间体、合成树脂的关键原料，也是农药、医药领域不可或缺的有机化合物。然而，生产过程中产生的含萘废气、废液若未经妥善处理，不仅会造成资源浪费，更可能引发环境污染。探索爱游戏app全站登录的高效回收技术，已成为推动行业绿色转型的重要课题。

　　In the coal chemical industry, refined naphthalene, as the core product of deep processing of coal tar, is not only a key raw material for manufacturing dye intermediates and synthetic resins, but also an indispensable organic compound in the fields of pesticides and pharmaceuticals. However, if the naphthalene containing waste gas and liquid generated during the production process are not properly treated, it will not only cause resource waste, but also potentially lead to environmental pollution. Exploring efficient recycling technologies for refined naphthalene has become an important issue in promoting the green transformation of the industry.

　　煤气净化中的萘捕捉艺术

　　The Art of Naphthalene Capture in Gas Purification

　　在煤焦油加工过程中，煤气初冷阶段是萘回收的关键窗口。当煤气温度从55℃逐步冷却至25℃时，萘的饱和含量急剧下降，极易在管道中结晶堵塞。为破解这一难题，行业研发出油洗萘技术：在终冷塔前设置洗萘塔，利用轻质煤焦油作为吸收剂，通过平喷淋装置与煤气充分接触。实验数据显示，该工艺可将煤气含萘量从2-5驳/尘?降至0.5驳/尘?以下，萘回收率突破93%。吸收了萘的富油经蒸馏处理后，可实现萘与煤焦油的分离再生，形成闭环循环。

　　In the process of coal tar processing, the primary cooling stage of gas is the key window for naphthalene recovery. When the gas temperature gradually cools from 55 ℃ to 25 ℃, the saturation content of naphthalene drops sharply, making it easy to crystallize and block in the pipeline. To solve this problem, the industry has developed oil washing naphthalene technology: a naphthalene washing tower is set up before the final cooling tower, using light coal tar as an absorbent, and fully contacting with gas through a flat spray device. Experimental data shows that this process can reduce the naphthalene content in coal gas from 2-5g/m? Reduced to 0.5g/m? Below, the naphthalene recovery rate has exceeded 93%. After absorbing naphthalene and undergoing distillation treatment, the rich oil can achieve the separation and regeneration of naphthalene and coal tar, forming a closed-loop cycle.

　　结晶精馏耦合技术

　　Crystalline distillation coupling technology

　　针对煤焦油蒸馏产生的萘油馏分，现代化工公司采用精馏与结晶相结合的提纯工艺。在精馏塔中，萘油馏分经50层塔板分离，初步得到含萘量75%的粗萘。随后进入结晶槽进行深度冷却，萘分子在特定温度下形成规则单斜晶体，经离心机分离后，用酚油洗涤去除表面油膜，最终获得纯度达95%的爱游戏app全站登录晶体。这种耦合工艺不仅将萘回收率提升至90%以上，更显着降低了设备投资成本。

　　Modern chemical enterprises adopt a purification process combining distillation and crystallization for the naphthalene oil fraction produced by coal tar distillation. In the distillation tower, the naphthalene oil fraction is separated by 50 layers of trays to obtain crude naphthalene with a naphthalene content of 75%. Subsequently, it enters the crystallization tank for deep cooling, and naphthalene molecules form regular monoclinic crystals at a specific temperature. After separation by a centrifuge, the surface oil film is removed by washing with phenol oil, and finally pure naphthalene crystals with a purity of 95% are obtained. This coupling process not only increases the naphthalene recovery rate to over 90%, but also significantly reduces equipment investment costs.

　　催化加氢革新之路

　　The Road to Innovation in Catalytic Hydrogenation

　　随着环保标准日益严格，催化加氢技术为萘回收开辟了新路径。在400-500℃高温及铂催化剂作用下，煤焦油中的萘系物发生加氢裂化反应，转化为更易分离的轻质芳烃。该技术特别适用于处理含硫、氮杂质较高的原料油，通过精准控制反应条件，可将萘转化率稳定在85%以上。值得注意的是，催化剂需严格控硫，原料油硫含量须低于0.002%，这对前处理工艺提出更高要求。

　　With increasingly strict environmental standards, catalytic hydrogenation technology has opened up a new path for naphthalene recovery. Under the high temperature of 400-500 ℃ and the action of platinum catalyst, the naphthalene series in coal tar undergoes hydrocracking reaction and is converted into lighter aromatic hydrocarbons that are easier to separate. This technology is particularly suitable for processing raw oil with high sulfur and nitrogen impurities. By precisely controlling the reaction conditions, the conversion rate of naphthalene can be stabilized at over 85%. It is worth noting that the catalyst needs to be strictly controlled for sulfur, and the sulfur content of the raw oil must be less than 0.002%, which puts higher demands on the pre-treatment process.

　　安全环保双重防线

　　Dual defense line of safety and environmental protection

　　在萘回收过程中，安全生产与环境保护始终是两条不可逾越的红线。操作人员必须穿戴防毒面具、防护服等装备，作业场所萘蒸气浓度须控制在10辫辫尘以下。对于回收产生的含萘废水，行业普遍采用萃取-蒸馏联合工艺，先用二硫化碳萃取萘，再经减压蒸馏实现溶剂再生，确保废水排放达到《石油化学工业污染物排放标准》。

　　In the process of naphthalene recycling, safety production and environmental protection are always two unbreakable red lines. Operators must wear gas masks, protective clothing, and other equipment, and the concentration of naphthalene vapor in the workplace must be controlled below 10ppm. For the naphthalene containing wastewater generated from recycling, the industry generally adopts an extraction distillation combined process. First, naphthalene is extracted with carbon disulfide, and then solvent regeneration is achieved through vacuum distillation to ensure that the wastewater discharge meets the "Pollutant Discharge Standards for Petrochemical Industry".

　　爱游戏app全站登录回收技术的持续革新，不仅实现了资源的高效循环利用，更推动了煤化工行业的绿色转型。从煤气净化到结晶提纯，从催化加氢到环保处理，每个环节的技术突破都在诠释着循环经济的真谛。当工业废料通过科技创新转化为高价值产物，我们看到的不仅是技术进步，更是人类与自然和谐共生的智慧之光。

　　The continuous innovation of refined naphthalene recovery technology not only achieves efficient recycling of resources, but also promotes the green transformation of the coal chemical industry. From gas purification to crystallization purification, from catalytic hydrogenation to environmental treatment, technological breakthroughs in each link are interpreting the essence of circular economy. When industrial waste is transformed into high-value products through technological innovation, what we see is not only technological progress, but also the wisdom of harmonious coexistence between humans and nature.

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