The hottest Wuxi resin recycling economy to achiev

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Wuxi resin: achieve win-win in circular economy

in recent years, according to the concept of circular economy, Bluestar new material Wuxi resin factory has changed the way of simply treating pollution in the past, focusing on the implementation of six projects, recycling and reusing the waste and waste gas produced by production units, and determining the treatment of three wastes in the process of production. The six projects involve chronic diseases that have a great impact on the environment and are recognized as extremely difficult to deal with in the industry. At the same time, the solution of these problems has produced considerable economic benefits and truly achieved a win-win situation of economy and environmental protection

the first is to recover epichlorohydrin (ECH). Epichlorohydrin is the main raw material for the production of epoxy resin. The wastewater produced in the production process contains a certain amount of epichlorohydrin, which affects consumption and pollutes the environment. Through countless times of analysis and research, technicians have achieved effective recovery by using the principle of distillation. The actual deformation accuracy of the project not only solves the problem of reducing the pollution discharge of epichlorohydrin cutting water, but also reduces the consumption of raw materials and greatly reduces the discharge of COD because the recovered epichlorohydrin can be reused. Based on the annual output of 30000 tons of epoxy resin, 255 tons of epichlorohydrin can be recovered in the whole year, saving 2.56 million yuan, reducing the production of cod677 tons/year, saving 2.36 million yuan of COD sewage treatment fee in one year, and the total benefit of the two items can be increased by 4.92 million yuan/year, truly realizing the three improvements of environmental benefits, social benefits and economic benefits

their second project is to recover phenol from phenol containing wastewater. In the production of F-type epoxy resin, the phenol content of the wastewater cut out for a long time is high, which affects the COD treatment. After many studies and explorations, at the beginning of 2004, the scientific and technological personnel studied and developed a new process of rectification treatment of phenol containing wastewater from F-type epoxy resin by referring to the key technology of phenol containing water treatment unit in bisphenol a plant process imported from abroad with an interval of 15-20em for three horizontal bars. After putting into use, the phenol recovery rate is as high as 98%, which not only directly reduces the phenol content in the wastewater from the production of F-type epoxy resin, reduces the pressure of sewage treatment, but also enables the qualified phenol from distillation to be recycled for production. More than 30 tons of phenol can be recovered a year, with a value of 400000 yuan, reducing the COD treatment cost of 1226000 yuan. The total benefit can be increased by 1.5955 million yuan/year, and about 350 tons of COD can be reduced

then comes the comprehensive treatment of waste gas. Since the completion of the refinery in 1987, the process tail gas produced by the catalytic unit has been vented to the flare for combustion, causing certain pollution to the surrounding atmosphere, and many useful components in the tail gas have been wasted. The technical personnel of the plant constantly explored, learned from various sources, fully investigated and demonstrated, and implemented the project of comprehensive utilization of torch tail gas into heat-conducting oil furnace and small steam furnace in 2003. By reforming the oil fired boiler of bisphenol a plant, the former uses dry gas, the by-product of tail gas, instead of diesel as fuel, which effectively reduces flare emissions and saves diesel worth more than 3 million yuan. The latter makes full use of the refinery tail gas for steam generation through the last 6 t/h boiler, which on the one hand reduces the emission of sulfur dioxide and eliminates the pollution caused by the waste gas burning through the torch; On the other hand, through the reuse of tail gas, the consumption of coal is reduced, and good economic benefits are generated through boiler steam generation. More than 60000 tons of coal are used less a year, and the annual output of steam is more than 10000 tons. This has aroused the widespread attention of the surrounding public and established a good image of the company

they also implemented 27000 tons/year gas separation and recycling. In 2004, after many investigations and studies, and drawing on the advanced experience of brother refineries, it was decided to build a gas separation unit to further refine high-value propylene using the liquefied gas produced by the catalytic unit. The gas separation project with a total investment of 28.17 million yuan can produce 6000 tons of propylene a year after recycling and deep processing. After removing raw materials and processing costs, it can create a new profit of about 20million yuan a year. At the same time, the tail gas recovery system of the refinery flare was further improved. The dry gas in the tail gas entered the gasholder for the steam generation of the small steam furnace, which escorted the smooth operation of the small steam furnace, so the flare went out. The new process of straight run diesel deacidification and naphthenic acid recovery can recover 136.8 tons of crude naphthenic acid products per year and 100 tons of refined naphthenic acid products per year. The purpose of saving tap water is also to avoid more serious problems in Longmei 280000 tons/year, saving about 100000 yuan/year of sewage treatment fee, and saving treatment fee. The force measuring stability of the experimental machine is determined by the quality of the sensor, which is about 700000 yuan/year, and reduces the difficulty of sewage treatment. The comprehensive utilization project of aging resin implemented by the plant can recover 120 tons of toluene and 50 tons of finished resin every year, with an economic benefit of 1.5 million yuan/year

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