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Corrosion inhibitors, fungicides in the circulating water treatment in the dominant position is difficult to shake

2016-10-15 22:46:16

         In the field of water resources protection and recycling, in recent years, membrane technology, zero emissions, new technologies continue to emerge, but the effect is not as good as imagined. At present, large-scale use of corrosion inhibitors, fungicides can still meet the basic requirements of circulating water, it is closely related with the water-saving and reuse, irreplaceable. 2015 China Water Treatment Technology Symposium, experts pointed out that the water treatment of chemical treatment is still the protection and reuse of cooling water on the basis of its mainstream position is difficult to change, fungicides and inhibitors of the variety of innovation will be the main direction of water treatment .

        There are three main problems in microcirculation, sedimentation, and corrosion. These three problems are different in circulating cooling water systems, but they are all directly or indirectly related to the cooling water system to solve these three problems. A problem, the best way is to join the agent. China Chemical Industry Association Industrial Water Treatment Professional Committee, Bao Qi-resistant vice president pointed out that the practice has proved that microbes in the circulating cooling water system cause trouble the fastest and most obvious, it may lead to rapid deterioration of water quality. Once a large number of sludge, corrosion and scale inhibitor immediate failure, which will directly damage the entire system, which is one of the three major problems of water treatment. Both zero-discharge directly into the cooling water system, or for the reclaimed water membrane system, the need to address microbial problems, so the prevention and control of microbial contamination of fungicides (1227 fungicide) development bear the brunt.
        Historically, oxidative and nonoxidizing fungicides (slime strippers) have alternately used two oxidizing biocides for the cooling water system, the earliest of which have been available for over half a century, inexpensive, broad-spectrum, highly efficient and high performance prices Than it is still in the circulating cooling water system control of microbial dominance. But the other drugs will have a negative impact on oxidant killer, and even destroy the equipment in the system, so kill the development of high efficiency, small negative impact of oxidizing biocides, is an important goal of innovation; in some aspects of non-oxidation It is more convenient and effective than the oxidizing biocide to seek synergistic effect in its recent development and application of the mainstream direction of the killing ability of the two drugs combined than single agent to kill capacity.
        According to Sinopec Qilu Branch victory on behalf of the refinery, fungicide, long-term use will make microbial resistance to affect the killing effect. In order to effectively control microorganisms and bio-slime, there are frequent alternation of increasing amounts and adding various fungicides to maintain the water treatment effect. Therefore, he believes that should develop a highly efficient, broad-spectrum, low toxicity, fast, lasting effect, with strong permeability, easy to use, suitable temperature and PH value range, and has other non-oxidative fungicidal properties .
       Not only the development of the application of oxidizing and non-oxidizing fungicides to the innovation and quality improvement of fungicide varieties should also include the monitoring of biodegradable agents, synergist killing, shellfish and fouling, and improvement of dosing systems .
        Reverse osmosis desalination technology has been widely used in wastewater reuse, wastewater zero emissions. Due to the characteristics of reverse osmosis desalination, reverse osmosis membrane in the concentrated water side of the surface is easy to deposit a variety of inorganic scale, reverse osmosis membrane desalination performance, shorten the service life of reverse osmosis membrane, serious, can cause reverse osmosis membrane Component waste. Bacteria and microbial breeding problems have been affecting the reverse osmosis system. In recent years, 80% to 70% of reverse osmosis system failure is caused by organic biological pollution. Therefore, the application of scale inhibitor has become an important part of reverse osmosis seawater desalination process, and the choice of scale inhibitor is directly related to the safety and economic operation of reverse osmosis plant.
        Phosphorus compounds commonly used inhibitors, corrosion inhibitors, as phosphorus emissions can cause eutrophication of water bodies. Therefore, the experts pointed out that the scale of phosphorus treatment and corrosion inhibitors in the context of production and application of the limitations and environmental protection requirements, there is no phosphorus or phosphorus, nitrogen, biodegradable and environmentally friendly scale inhibitor is water treatment pharmaceutical industry And the main direction. According to Sinopec Shanghai Petrochemical Co., Ltd. Tao Wu Rong engineers, in recent years the new development of the new agent (PESA) on the polyepoxysuccinic acid and thermal stability of the dual function of corrosion inhibitors, phosphorus-free nitrogen, Environmental protection, known as green water treatment agent.

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