柴油机尾气NO_x机内净化新技术

The NO_x Purification New Technology in Diesel Engine Research

为了减少柴油机尾气中的NOx含量和不降低柴油机的热效率,对NOx形成机理和对柴油机尾气净化现有技术进行研究,提出了一种在柴油机气缸内部,在无催化剂的条件下,在柴油机燃烧温度下降到有效反应温度范围内时喷入还原剂液氨NOx的净化新技术。通过与普通典型汽车柴油机4102BZLQ配机试验,验证了新技术的可行性,并且测得了标定工况下的NOx含量值,该值低于欧V标准值。其创新之处:①不须对燃烧温度进行限制。为柴油机热效率的提高和燃烧技术的组织提供了条件;②不使用催化剂。采用气缸内直接喷氨技术。充分利用了柴油机自身废气中的氧化还原物的活化能,并解决了现有技术难以解决的效率、结构、寿命、可靠性等难题。

In order to reduce NOx in diesel tail gas without reducing the thermal efficiency,NOx formation mechanism and existing technology of diesel tail gas purification are researched,a NOx purification technology is presented,in which the liquid ammonia is injected into a cylinder in the engine-house,without catalyst,when the diesel engine burning temperature lowers to an effective reaction temperature range.This new technology is tested on a typical automotive diesel 4102BZLQ,its feasibility is verified,and the NOx content value is measured under rated operating condition,it is below the Euro V standard value.The innovations are：No limit to the burning temperature.② No catalyst is used and the liquid ammonia is injected directly.The activation energy of oxidation reduction matter in the waste gas of diesel engine itself is utilized fully,and the efficiency,structure,life and reliability problems unable to be solved by other technologies are solved.