二氧化氯发生器在循环冷却水与冷冻水处理工艺中的使用情况介绍
ClO2二氧化氯是一种强氧化剂，也是高效、广谱、安全的杀菌剂。自20世纪70年代中期以来，国外已将二氧化氯用于循环冷却水系统的微生物控制。二氧化氯在改善循环冷却水系统污泥沉降、控制腐蚀、控制细菌和藻类等方面具有重要作用。20世纪90年代以来，二氧化氯产品在我国循环冷却水处理中得到了广泛的应用，并取得了良好的效果。1、 根据二氧化氯的杀灭特性，控制冷却水系统微生物生长的方法是添加杀菌剂。常用的杀菌剂有液氯、次氯酸钠、二氧化氯等氧化性杀菌剂和季铵盐、氯酚、有机胺等非氧化性杀菌剂。氯气应用广泛，但碱性环境会使氯气的杀菌效果严重下降，水中的氯和有机物会产生致癌物，加氯设备存在潜在的腐蚀和泄漏，促使人们寻求更好的替代产品。
二氧化氯作为一种替代产品，具有以下特点：
1、二氧化氯具有广谱高效杀菌能力，其有效氯是氯的2.63倍，杀菌效果是氯的5倍。
2、ClO2不受pH值的影响，在碱性条件下，ClO2更有优势。此外，二氧化氯不与氨和氨基化合物发生反应，因此可以保持杀灭能力。这一特性使二氧化氯非常适合于氨厂和炼油厂的冷却水处理。3、二氧化氯不仅能杀灭微生物，还能分解残留的细胞结构，有效控制细菌、藻类和黏液，具有泥剥效果，提高传热效率。
4、二氧化氯的杀菌作用持续时间长，长期使用不会对微生物产生耐药性。同时，二氧化氯的杀菌能力随着温度的升高而增强。
二氧化氯在工业循环冷却水中的应用：
1、石化总厂腈纶装置循环水系统2套，循环水量5500t/h，截留水量2600t，浓缩倍数3.0，采用稳态二氧化氯代替氯气工业试验，一次性冲击加药2%稳态二氧化氯250kg，有效二氧化氯浓度为0.3mg/l，给药后24小时异养菌总数为1.13×102/ml，给药后48小时异养菌总数为3.73×102/ml。2某炼油厂循环水系统采用2%稳态二氧化氯，投加量为20ppm，每三天投加一次，历时半年以上。
异养菌总数一般控制在103个/ml，生物泥为1ml/m3，浊度小于10mg/L，清洗汽提时加2%稳态二氧化氯2100mg/L，循环24小时后水质变化效果明显。浊度从4mg/L逐渐上升到47mg/L，总铁从04mg/L上升到38mg/L。3、二氧化氯在工业循环冷却水处理中应用多年的发展趋势证明，二氧化氯具有良好的杀藻杀菌和控制生物泥的作用，对漏氨、漏油的碱处理方案和循环系统更有效。因此，操作成本低、操作简单、安全的二氧化氯产品将更容易被用户接受。化学二氧化氯发生器：是一种成熟的产品，常用规格为30g/H~20000g/H，二氧化氯发生器由二氧化氯发生系统、计量控制系统、加药泵系统等组成，设备类型为负压吸入式。反应过程为氯酸钠+盐酸。该设备结构合理，设计精巧，操作方便，安全可靠，使用寿命长，可连续加药或间歇冲击加药，并可配置在线检测和自动控制系统，实现无人值守操作。化学二氧化氯发生器特别适用于大型循环水系统。在相同投加量下，沃特桑尼二氧化氯发生器的成本比稳态二氧化氯发生器低93%，其标准配置中采用VAREM加药计量泵与ALIWATER控制系统。一般来说，二氧化氯发生器在一年内的运行成本会降低。以上是沃特桑尼二氧化氯发生器在工业循环冷却水处理中的应用。二氧化氯消毒剂的杀菌效果如何？二氧化氯是一种广谱高效杀菌剂。国外许多研究结果表明，二氧化氯在极低浓度（0.1ppm）下能杀灭大肠杆菌、金黄色葡萄球菌等多种致病菌。即使在有机物的干扰下，当浓度为几十ppm时，细菌繁殖体、肝炎病毒、噬菌体和细菌孢子等sy微生物也能被完全杀灭。
Application of chlorine dioxide generator in treatment process of circulating cooling water and chilled water
ClO2 chlorine dioxide is a kind of strong oxidant, and it is also an efficient, broad-spectrum and safe bactericide. Since the mid-1970s, chlorine dioxide has been used in the microbial control of circulating cooling water system abroad. Chlorine dioxide plays an important role in improving sludge sedimentation, controlling corrosion, controlling bacteria and algae in circulating cooling water system. Since the 1990s, chlorine dioxide products have been widely used in the treatment of circulating cooling water in China, and achieved good results. 1. According to the killing characteristics of chlorine dioxide, the way to control the growth of microorganisms in cooling water system is to add fungicides. The commonly used bactericides are oxidizing bactericides such as liquid chlorine, sodium hypochlorite and chlorine dioxide, and non oxidizing bactericides such as quaternary ammonium salt, Chlorophenol and organic amine. Chlorine is widely used, but its germicidal efficacy will be seriously reduced in alkaline environment. Chlorine and organic matter in water will produce carcinogens. There is potential corrosion and leakage in chlorination equipment, which urges people to seek better alternative products.
As an alternative product, chlorine dioxide has the following characteristics: 1. Chlorine dioxide has a broad-spectrum and efficient bactericidal ability. Its effective chlorine is 2.63 times of chlorine and its bactericidal effect is 5 times of chlorine. 2clo2 is not affected by pH value, and ClO2 is more advantageous in alkaline condition. In addition, chlorine dioxide does not react with ammonia and amino compounds, so it can maintain its killing ability. This characteristic makes chlorine dioxide very suitable for ammonia plant and refinery cooling water treatment. Three. Chlorine dioxide can not only kill microorganisms, but also decompose the residual cell structure, effectively control bacteria, algae and mucus, with mud stripping effect and improve heat transfer efficiency. The bactericidal effect of chlorine dioxide lasts for a long time, and long-term use will not produce drug resistance to microorganisms. At the same time, the bactericidal ability of chlorine dioxide increased with the increase of temperature. 2. Application of chlorine dioxide in industrial circulating cooling water 1. There are 2 sets of circulating water system in acrylic fiber plant of general petrochemical plant, with circulating water 5500t / h, intercepted water 2600t and concentration multiple of 3.0. Steady state chlorine dioxide is used to replace chlorine gas in industrial test. 2% steady state Chlorine Dioxide 250kg is added at one time. The effective chlorine dioxide concentration is 0.3mg/l. The total number of heterotrophic bacteria is 1.13 × 102 / ml 24 hours after administration and 3.73 × 102 / ml 48 hours after administration. 2. The circulating water system of a refinery adopts 2% stable chlorine dioxide with a dosage of 20ppm, which is added every three days for more than half a year.
The total number of heterotrophic bacteria is generally controlled at 103 / ml, the biological sludge is 1ml / m3, the turbidity is less than 10mg / L, and 2% stable chlorine dioxide 2100mg / L is added during cleaning stripping. The effect of water quality change is obvious after 24 hours of circulation. Turbidity increased from 4mg / L to 47mg / L, and total iron increased from 04mg / L to 38mg / L. 3. The development trend of chlorine dioxide used in industrial circulating cooling water treatment for many years has proved that chlorine dioxide has a good function of killing algae and controlling biological sludge, and is more effective for alkali treatment scheme and circulating system with ammonia leakage and oil leakage. Therefore, chlorine dioxide products with low operation cost, simple operation and safety will be more easily accepted by users. Chemical chlorine dioxide generator: it is a mature product, with the common specification of 30g / H ~ 20000g / h. It is composed of chlorine dioxide generation system, metering control system, dosing system, etc., and the equipment type is negative pressure suction type. The reaction process is sodium chlorate + hydrochloric acid. The equipment has reasonable structure, exquisite design, convenient operation, safe and reliable, long service life, continuous dosing or intermittent impact dosing, and can be equipped with online detection and automatic control system to realize unattended operation. Chemical chlorine dioxide generator is especially suitable for large circulating water system. At the same dosage, the cost of watersunny chlorine dioxide generator is 93% lower than that of steady-state chlorine dioxide generator. In its standard configuration, Varem dosing metering pump and alwater control system are used. Generally speaking, the operation cost of chlorine dioxide generator will be reduced within one year. The above is the application of watersunny chlorine dioxide generator in industrial circulating cooling water treatment. What is the germicidal efficacy of chlorine dioxide disinfectant? Chlorine dioxide is a broad-spectrum and efficient bactericide. Many studies abroad have shown that chlorine dioxide can kill many pathogenic bacteria such as Escherichia coli and Staphylococcus aureus at very low concentration (0.1ppm). Even under the interference of organic matter, sy microorganisms such as bacterial propagules, hepatitis virus, bacteriophages and bacterial spores can be completely killed when the concentration is tens of ppm.