VAREM聚合氯化铝计量泵在污水处理中的应用
目前，随着国内环保污水处理行业投资的不断加大，VAREM聚合氯化铝加药计量泵的市场需求也在不断增加。VAREM计量泵主要用于工业污水、自来水净化等领域，这两个领域的消耗量约占总消耗量的70%。工业污水40%以上用于工业污水净化；约30%用于自来水净化和生活污水处理；20%用于工业循环水和河水库净化；10%用于其他。VAREM聚合氯化铝计量泵输送的介质为聚合氯化铝，又称聚合氯化铝。是一种高效净水剂。它是一种多羟基、多核络合物的阳离子无机高分子絮凝剂。固体产品表面呈浅黄色。目前，氯化铝絮凝剂的研究与开发在我国水处理领域具有重要意义。目前，产品开发有两个方向。聚合氯化铝，又称聚合氯化铝，是一种高效的净水剂。它是一种多羟基、多核络合物的阳离子无机高分子絮凝剂。固体产品表面呈浅黄色。该产品净水效果显著，絮凝快，沉降快，活性好，无需添加碱性添加剂即可除菌、除臭、脱色。可有效去除水中的SS、COD、BOD、砷、汞等重金属。聚合氯化铝由于其突出的特性和广泛的应用范围，已成为国内外公认的优良净水剂，用量降低30%以上，成本节约40%以上。此外，它还可以用来去除饮用水的水质，如铁、镉和氟化物。近年来，聚合氯化铝已发展成为技术成熟、市场销售量大的净水剂，并有逐步取代传统净水剂的趋势。随着国家环保要求的进一步提高，工业污水处理量仍将大幅增加。聚合氯化铝是目前国际上广泛使用的一种新型高效无机高分子混凝剂。其化学通式为[Al2（OH）nCl6-n]m，通过压缩双层、吸附电中和、吸附架桥、沉淀网等作用，使水中细小悬浮颗粒和胶体颗粒失稳、聚集、絮凝、凝聚、沉淀。广泛用于自来水厂、发电厂（火电厂）的供水和工业水净化，以及化工厂、冶炼厂、石油化工厂、造纸厂、印染厂、印染厂、化工厂等各种工厂的工业废水处理。其性能优于传统的硫酸铝、硫酸亚铁等低分子无机盐。此外，它还具有投加量小、明矾量大、去除COD、色度和悬浮物性能好等优点。VAREM聚合氯化铝加药计量泵的应用范围：聚合氯化铝是国际上普遍使用的新型高效无机高分子混凝剂。它通过压缩双层、吸附中和、吸附架桥、沉淀网等作用机理，使水中细小悬浮颗粒和胶体颗粒失稳、聚集、絮凝、凝聚、沉淀。因此，VAREM聚合氯化铝加药计量泵也广泛应用于自来水厂、发电厂（火电厂）的供水和工业水净化，以及化工厂、冶炼厂、石油化工厂、造纸厂、印染厂、印染厂、印染厂、印染厂等各种工厂的给水和工业水净化化工厂。其性能优于传统的硫酸铝、硫酸亚铁等低分子无机盐。此外，它还具有投加量小、明矾量大、去除COD、色度和悬浮物性能好等优点。该工艺以铝土矿或副产铝灰、工业盐酸或废盐酸为原料，一步生产聚合氯化铝。产品质量符合gb15892-1995标准，达到同类产品的先进水平。
VAREM聚氯化铝加药计量泵在市场上的两大优势：
首先，我国聚合氯化铝生产的设备投资和成本远低于国外，产品在国际市场上具有很大的竞争优势。目前，PAC的年净出口量约为3.4万吨。国内企业可以在未来几年将产品推向国际市场。
第二，未来几年国内对聚合氯化铝的需求将大幅增长。我国提出的污水处理目标是2011年城市污水集中处理率达到50%。预计国家将投资6500亿元，用于处理工业废水和城市污水。
聚合氯化铝是国内外发展迅速的精细化工产品。它是一种高效的水处理絮凝剂，其研究开发对水处理和精细化工具有重要意义。目前，产品开发有两个方向。一是开发制备聚合氯化铝产品的新材料。用铝屑、铝灰、铝渣等原料制备聚合氯化铝产品工艺相对简单，早期发展较快。但近年来，由于铝屑、铝灰等含铝材料价格不断上涨，以及利用这些材料生产其他价值较高的含铝产品的出现，用这种原料生产聚合氯化铝的产量日益减少。由于氢氧化铝和氯化铝的生产成本太高，国内一般采用含铝矿物制备聚合氯化铝。近年来，利用工业废弃物（粉煤灰、煤矸石）作为原料的研究应引起足够的重视。以工业废料为原料生产聚合氯化铝，不仅节约了材料成本，而且实现了废弃物的回收利用，是一个具有很大市场应用前景的研究领域。另一个方向是将聚合氯化铝与无机或有机高分子絮凝剂复合或复合应用研究，复合或复合药剂可以弥补单一絮凝剂的不足，既有单一絮凝剂的优点，应用范围广，又能提高去除率有机物的存在，降低了残留金属离子的浓度，可以显著提高絮凝效果。另外，国内PAC生产过程多为间歇式生产，污染严重，原料利用率低，产品质量不稳定。开发高效、连续的生产工艺将成为未来工业生产研究的热点。
近年来，我国聚合氯化铝产业发展迅速，拥有300多家生产企业。2005年生产能力达到17万吨/年（按氧化铝含量30%的固体产品计）。但生产企业规模较小，年产量以2000-5000吨为主；产业发展的区域性特征明显，主要分布在河南、山东、江苏、浙江等地，河南省巩义地区有生产企业77家，占比超过50家占全国产量的30%。我国原料来源丰富，聚合氯化铝的生产成本相对较低。聚合氯化铝的生产工艺有很多种。首先以铝灰为原料，然后用粘土矿、高岭石、铝土矿等为原料。目前，由于国内外市场产品质量指标的不断提高，我国使用的原材料已逐渐转向氢氧化铝。目前，滚筒干燥在国内固体产品中得到广泛应用，其技术已接近或达到先进水平。
上海龙亚泵阀提供的VAREM聚氯化铝加药计量泵附件及应用：微计量泵的基本附件包包括：底阀、注射阀、2米吸入管和5米排出管（电机型无此配置）。液压端包括：泵头、隔膜、阀门、背板、安装螺栓等。
Application of VAREM polyaluminum chloride metering pump in wastewater treatment
At present, with the increasing investment of domestic environmental protection sewage treatment industry, the market demand of VAREM polyaluminum chloride dosing metering pump is also increasing. VAREM polyaluminum chloride dosing metering pump is mainly used in industrial sewage, tap water purification and other fields, the consumption of these two areas accounts for about 70% of the total consumption. More than 40% of industrial sewage is used for industrial sewage purification; about 30% is used for tap water purification and domestic sewage treatment; 20% is used for industrial circulating water and river reservoir purification; and 10% is used for other purposes. The medium conveyed by VAREM polyaluminum chloride metering pump is polyaluminum chloride, also known as polyaluminum chloride. It is a kind of high efficiency water purifying agent. It is a kind of cationic inorganic polymer flocculant with polyhydroxy and multinuclear complex. The surface of solid product is light yellow. At present, the research and development of aluminum chloride flocculant is of great significance in the field of water treatment in China. At present, there are two directions for product development. Polyaluminum chloride, also known as polyaluminum chloride, is a kind of high efficiency water purifying agent. It is a kind of cationic inorganic polymer flocculant with polyhydroxy and multinuclear complex. The surface of solid product is light yellow. The product has remarkable water purification effect, fast flocculation, fast sedimentation and good activity. It can remove bacteria, deodorization and decolorization without adding alkaline additives. It can effectively remove SS, COD, BOD, arsenic, mercury and other heavy metals in water. Due to its outstanding characteristics and wide range of application, polyaluminum chloride has become an excellent water purification agent recognized at home and abroad. The dosage is reduced by more than 30% and the cost is saved by more than 40%. In addition, it can be used to remove the quality of drinking water, such as iron, cadmium and fluoride. In recent years, polyaluminum chloride has developed into a kind of water purifying agent with mature technology and large market sales volume, and has the trend of gradually replacing the traditional water purifying agent. With the further improvement of national environmental protection requirements, the industrial sewage treatment capacity will still increase significantly. Polyaluminum chloride is a new type of inorganic polymer coagulant widely used in the world. The general chemical formula is [Al2 (OH) nCl6-n] m. The fine suspended particles and colloidal particles in water are unstable, agglomerated, flocculated, coagulated and precipitated by compressing double layers, neutralizing by adsorption, bridging by adsorption and sedimentation network. It is widely used for water supply and industrial water purification in waterworks, power plants (thermal power plants), and industrial wastewater treatment in chemical plants, smelters, petrochemical plants, paper mills, printing and dyeing plants, chemical plants and other factories. Its performance is better than the traditional aluminum sulfate, ferrous sulfate and other low molecular weight inorganic salts. In addition, it has the advantages of small dosage, large amount of alum, good performance of removing COD, chroma and suspended solids. Application scope of VAREM polyaluminum chloride dosing metering pump: polyaluminum chloride is a new type of high-efficiency inorganic polymer coagulant widely used in the world. Through the mechanism of compression double layer, adsorption neutralization, adsorption bridging and sedimentation network, the fine suspended particles and colloidal particles in water are unstable, agglomerated, flocculated and precipitated. Therefore, VAREM polyaluminum chloride dosing metering pump is also widely used in water supply and industrial water purification of waterworks, power plants (thermal power plants), as well as water supply and industrial water purification chemical plants of chemical plants, smelters, petrochemical plants, paper mills, printing and dyeing plants, printing and dyeing plants, printing and dyeing plants. Its performance is better than the traditional aluminum sulfate, ferrous sulfate and other low molecular weight inorganic salts. In addition, it has the advantages of small dosage, large amount of alum, good performance of removing COD, chroma and suspended solids. The process uses bauxite or by-product aluminum ash, industrial hydrochloric acid or waste hydrochloric acid as raw materials to produce polyaluminum chloride in one step. The product quality is in line with the GB 15892-1995 standard, reaching the some advanced level of similar products.
Two advantages of VAREM polyaluminum chloride dosing metering pump in the market:
First of all, the equipment investment and cost of polyaluminum chloride production in China are far lower than those in foreign countries, and the products have great competitive advantages in the international market. At present, the annual net export volume of PAC is about 34000 tons. Domestic enterprises can push their products to the international market in the next few years.
Second, the domestic demand for polyaluminum chloride will increase substantially in the next few years. The goal of sewage treatment proposed by China is to achieve 50% centralized treatment rate of urban sewage in 2011. It is estimated that the state will invest 650 billion yuan to treat industrial wastewater and urban sewage.
Polyaluminum chloride is a fine chemical product with rapid development at home and abroad. It is an efficient flocculant for water treatment, and its research and development is of great significance to water treatment and fine chemical industry. At present, there are two directions for product development. A new product of aluminum chloride is developed. The preparation process of polyaluminum chloride from aluminum chips, aluminum ash, aluminum slag and other raw materials is relatively simple, and its early development is rapid. However, in recent years, due to the rising prices of aluminum chips, aluminum ash and other aluminum containing materials, and the emergence of using these materials to produce other high value aluminum products, the production of polyaluminum chloride with this raw material is decreasing. Due to the high production cost of aluminum chloride and aluminum chloride in China, aluminum chloride is widely used in production. In recent years, the research on using industrial waste (fly ash, coal gangue) as raw materials should be paid enough attention to. The production of polyaluminum chloride from industrial waste not only saves the material cost, but also realizes the recycling of waste. It is a research field with great market application prospect. The other direction is to study the composite or composite application of polyaluminum chloride and inorganic or organic polymer flocculant. The composite or composite agent can make up for the deficiency of single flocculant. It has the advantages of single flocculant, has a wide range of application, and can improve the removal rate of organic matter, reduce the concentration of residual metal ions, and significantly improve the flocculation effect. In addition, the domestic PAC production process is mostly intermittent production, which causes serious pollution, low utilization rate of raw materials and unstable product quality. The development of efficient and continuous production process will become the hot spot of industrial production research in the future.
In recent years, China's polyaluminum chloride industry has developed rapidly, with more than 300 production enterprises. In 2005, the production capacity reached 170000 tons / year (based on solid products with 30% alumina content). However, the scale of production enterprises is small, and the annual output is mainly 2000-5000 tons; the regional characteristics of industrial development are obvious, mainly distributed in Henan, Shandong, Jiangsu, Zhejiang and other places. There are 77 production enterprises in Gongyi area of Henan Province, accounting for more than 50, accounting for 30% of the national output. China is rich in raw materials, and the production cost of polyaluminum chloride is relatively low. There are many production processes of polyaluminum chloride. Firstly, aluminum ash is used as raw material, and then clay ore, kaolinite and bauxite are used as raw materials. At present, due to the continuous improvement of product quality index at home and abroad, the raw material used in China has gradually turned to aluminum hydroxide. At present, drum drying has been widely used in domestic solid products, and its technology has approached or reached advanced level.
VAREM polyaluminum chloride dosing metering pump accessories and applications provided by Shanghai Longya pump valve: the basic accessories of micro metering pump include: bottom valve, injection valve, 2 m suction pipe and 5 m discharge pipe (no such configuration for motor type). Hydraulic end includes: pump head, diaphragm, valve, back plate, mounting bolt, etc.