How to carry out the energy-saving transformation of the cassava deep-processing process has always been a problem faced by small and medium-sized cassava ethanol companies. Recently, the reporter learned from the relevant government departments in Guangxi Guiping City that since the cassava was opened and pressed in November this year, Jinyuan Alcohol Industry Co., Ltd. located in the city has successfully solved this problem with cassava ethanol deep processing technology.
Jinyuan Company exchanges the waste heat of the main steam process such as cooking and distillation in the ethanol production process, changes the traditional water cooling to slurry cooling, and uses the spiral plate heat exchanger to heat the hot and cold mash at different temperatures. Exchange and reuse not only save a lot of steam, save 10% of coal, but also save a lot of cooling water, reducing water consumption by 8,000 cubic meters per day.
In addition, in the traditional ethanol production process, there will be high concentrations of high COD content of ethanol emissions. The company's existing biochemical treatment system cannot meet the waste processing needs. In order to comprehensively treat waste liquid, the company conducted a technical "consultation" and decided to implement wastewater treatment and biogas recovery power generation technology transformation projects. They used solid-liquid separation and upflow anaerobic sludge blanket reactor technology to carry out secondary anaerobic treatment of waste liquids, with a daily treatment capacity of 6,000 cubic meters, and to recover the large amount of biogas generated therefrom for boiler use. Sequencing Batch Activated Sludge technology is then used to perform secondary aerobic treatment of the anaerobic effluent to further treat COD and other organics in the effluent to achieve water quality standards.
Through the implementation of the above technologies, the company will reduce greenhouse gas CO2 emissions by 83,840 tons, cooling water consumption by nearly 2.64 million tons, COD emissions by 88,900 tons, annual coal consumption by 40%, annual coal saving by 32,000 tons, and reducing sulfur dioxide emissions. More than 400 tons.