应用重力热管组成换热器用于小型工业锅炉进行余热回收,具有体积小、重量轻、结构紧凑、气侧阻力小、耐低温腐蚀性能较好、布置灵活方便等特点。经在浙江富阳县三个企业的示范点应用测试,小型锅炉效率可以提高3～4％以上,投资回收年限在一年或一年以内。表明该换热器有良好的经济及社会效益,在城乡企业中有广阔应用前景。 Application of gravity heat pipe heat exchanger for small industrial boilers for waste heat recovery, with small size, light weight, compact structure, gas-side resistance, low temperature corrosion resistance is good, flexible and convenient layout and so on. After the demonstration test of three enterprises in Fuyang County, Zhejiang Province, the efficiency of small boilers can be increased by 3 ~ 4% and the investment recovery period can be within one year or less. Show that the heat exchanger has good economic and social benefits, urban and rural enterprises have broad application prospects.