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Dealing with chemical waste such as PTA is a very difficult technical problem. Most foreign developed countries use underground deep landfill or the use of oil furnace high-temperature incineration methods for disposal. The PTA residue treatment technology adopts a fully automatic control incineration device. This type of incineration device fully utilizes the calorific value of the chemical waste slag without requiring auxiliary fuels such as coal and fuel to perform high-temperature harmless incineration. The volume of chemical waste has been reduced by more than 99%. The flue gas purifiers used in the installations also skillfully utilize the flow of high-temperature flue gas, and the efficiency of dust removal and desulfurization are 96% and 80% respectively, and the emission concentrations of two pollutants such as 2-oxin are eliminated without power consumption. All better than national standards. In addition, after being improved, this technology can dehydrate the PTA residue, and then return the separated rinsing water to the PTA production equipment as the residue's beating water, successfully achieving the recycling of the wastewater and reducing the sewage treatment process. . According to statistics, with this new technology, an enterprise with an annual output of 600,000 tons of PTA can reduce waste water discharge by more than 2,000 tons per day and reduce sludge emissions by nearly 30 tons. At present, this new technology has been successfully applied in large chemical companies such as Sinopec Zhejiang Yisheng Petrochemical Company and Shanghai Yadong Petrochemical Company.
It has been estimated that a PTA waste incinerator with a daily capacity of 20 to 30 tons will produce 40 tons of waste steam per year, saving more than 13,000 tons of coal annually and recovering a large amount of waste from the residue. Metal cobalt and manganese metal, the annual comprehensive utilization of 2.5 million yuan. This technology is not only applicable to the recycling of PTA residues, but also applicable to organic chemical wastes such as trimellitic anhydride waste, acrylic waste oil, dye coating waste residue, resin waste, waste mineral oil and waste organic solvents, and various types of medical waste. Harmless treatment. This technology has filled the domestic gap and has been listed as a national key environmental protection practical technology promotion project.
PTA residue treatment technology energy efficient
The resource treatment technology for refined terephthalic acid (PTA) residue developed by Jiangsu Fuchang Environmental Protection Technology Group Co., Ltd. is an incineration and resource recycling technology that does not require any fuel. The heat energy generated during the incineration process can be fully recycled.