How does the largest phosphorus chemical industry base in the country address the issue of three types of waste?
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Some time ago, it seems that **2,087 enterprises were shut down, under the pretext of energy conservation and emission reduction. How is the emission of current phosphorus compound fertilizers addressed? Do you know anything about Guizhou?
It can be said that the emission solutions for phosphorus-based compound fertilizers are now quite mature; the best of them involve closed-loop systems, which are both environmentally friendly and cost-effective.
Thank you, are there any relevant materials? Recently, several phosphorus chemical companies have come to our company to inquire about wastewater treatment processes. According to them, they received a request from the environmental protection authorities to carry out modifications as their emissions did not meet the standards.
It is possible to consult reputable domestic design institutes specializing in phosphorus chemical engineering, such as Sichuan University, Wuhuan, and Donghua University.
Near-zero emissions can be achieved; the technology is actually quite mature, though the initial investment is relatively high
Zero wastewater discharge in the phosphorus chemicals industry is no longer a problem; I was the one who developed our company’s zero-discharge plan back in 2007. It works fine, and the water quality is pretty good too! Except it cannot be used in the cooling water of equipment!
Reply to 6# huang2864: What technology do you use? Multi-effect evaporation? Are the operating costs high?
There is one in Guizhou as well; for example, the Tianfeng Phosphatic Ammonium Plant, a joint venture of Chitianhua, was shut down
Reply to 7# zh_51982: What products do you produce?
Regarding the current treatment processes for the three types of waste, wastewater and waste gas can meet the required standards; the key lies in the treatment and recycling of waste residue and phosphogypsum.
Wastewater can be recycled, through both large-scale and small-scale cycles. As for waste gases, measures need to be taken from a management perspective, including the installation of additional washing and dust removal equipment. Waste residues can be utilized in various ways: pyrite slag can be used for iron extraction, while phosphogypsum can be used to produce gypsum boards, cement retarders, lime via co-production with ammonium sulfate, as well as phosphogypsum-based cardboard.