本文主要叙述燃料中含水的普遍性和水在燃料中的作用和热损失，以及油掺水必须乳化的必要性和乳化油应有的颗粒粒径、粘度、破乳温度等技术指标；也指出了评价乳化重油中所加的乳化剂的原则和评价乳化重油的节能原则；简述了油掺水的燃烧机理和能改善环保的演算；进而提出以造纸黑液代水，以利节能、节水、改善环保的建议。 This paper describes the prevalence of water in the fuel and the role of water in the fuel and heat loss, as well as the necessity of emulsification of oil and water must be emulsified oil particle size, viscosity, demulsification temperature and other technical indicators; also pointed out The principle of emulsifier added in emulsified heavy oil and the energy-saving principle of emulsified heavy oil were reviewed. The combustion mechanism of oil-doping and the calculation to improve the environmental protection were briefly described. Then, Water, suggestions to improve the environment.