State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering of Zhejiang University, Hangzhou, 310027, Zhejiang, China.
State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering of Zhejiang University, Hangzhou, 310027, Zhejiang, China.
Environ Pollut. 2023 Oct 15;335:122249. doi: 10.1016/j.envpol.2023.122249. Epub 2023 Jul 22.
The tanning sludge (TS) and other tanning solid wastes are produced in significant quantities by the leather industry. To evaluate the combustion properties, acid gaseous pollutant conversion, and ash management, co-firing of TS with various wastes was investigated in a bubbling fluidized bed. TG-FTIR test indicated that tanning solid wastes had superior combustion properties and include more gaseous pollutants than TS. The leather mixed solid waste (LMSW) formed by mixing had better fuel characteristics than TS. The conversion rates of SO and HCl of LMSW incineration were 67% and 40%, respectively. The co-combustion of TS and solid wastes reduces the conversion rate of acid gas. Increasing the proportion of high-inorganic chlorine raw material could further reduce the conversion rate and increase the ash fusion temperature appropriately. Because ash and slag were primarily composed of Ca and Fe elements, the addition of calcium carbonate (CaCO) can increase ash melting point while reducing acid gas emissions. When CaCO was added at a calcium to sulfur (Ca/S) ratio of 2, the acid gas emission was reduced by more than 80% and the softening temperature was raised by 90 °C. When Ca/S is greater than 2, the economics of adding CaCO decreased.
制革工业会产生大量的鞣革污泥（TS）和其他鞣革固体废物。为了评估燃烧特性、酸气体污染物转化和灰分管理，在鼓泡流化床中对 TS 与各种废物的共燃进行了研究。TG-FTIR 测试表明，鞣革固体废物的燃烧性能优于 TS，且包含更多的气态污染物。由混合制成的皮革混合固体废物（LMSW）具有比 TS 更好的燃料特性。LMSW 焚烧过程中 SO 和 HCl 的转化率分别为 67%和 40%。TS 和固体废物的共燃烧降低了酸气的转化率。增加高无机氯原料的比例会进一步降低转化率并适当提高灰熔融温度。由于灰分和炉渣主要由 Ca 和 Fe 元素组成，添加碳酸钙（CaCO）可以在降低酸气排放的同时提高灰熔点。当 CaCO 的添加量为钙硫比（Ca/S）为 2 时，酸气排放量减少了 80%以上，软化温度提高了 90°C。当 Ca/S 大于 2 时，添加 CaCO 的经济性降低。
