Environmental protection analysis of the hottest s

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Environmental protection analysis of steel barrel production

quality and environmental protection of steel barrel

the most serious quality problem of steel barrel is leakage, which has attracted the attention of many barrel making experts, but it has not been completely solved so far. The contents of steel drums are diverse, including food, petroleum products, chemical raw materials, drugs, etc. Some of them are highly toxic, some are easy to react with the outside world to produce corrosion or pollution, and some are flammable and explosive... Accidents caused by steel barrel leakage or environmental pollution events occur from time to time

the leakage of the steel barrel is mainly caused by the quality problems of the barrel body weld and the sealing of the barrel bottom and top. In order to solve this problem, China's steel barrel structure has been improved from the original five layer rectangular crimping to seven layer arc crimping. Since 2013, the welding machine has been improved from manual semi-automatic to full-automatic, thus improving the sealing quality of the steel barrel and reducing leakage. Moreover, all products have been tested by air pressure, and the leakage of steel drums has been basically eliminated

steel drum structure and environmental protection

the closed steel drum structure specified in the national standard GB "steel drums for packaging containers" has the problem of residual materials, which not only causes waste, but also pollutes the environment. After the steel drums with residues are discarded, some residues may pollute the environment. If the steel barrel is renovated and reused, cleaning the steel barrel will bring greater pollution. In recent years, there have been several steel barrel structures without residues in the world, such as arched barrel top or groove drainage structure, which can compare the properties measured by different materials, such as arched barrel top or groove drainage structure. Closed steel drums with this structure should be advocated

steel barrel coating materials and environmental protection

over the years, China's steel barrel coating has not developed much, but it has been improved from the coating process. Although environmental pollution has been reduced, it will still cause some pollution in the process of steel barrel coating. In recent years, many new environmental protection coatings have appeared at home and abroad. The domestic steel barrel industry should increase the use and popularity of these new coatings

in addition, pre coating is a great change in coating, which changes the coating of steel barrels from the final finished product to the coating of raw materials, thus reducing the pollution in the coating process

water based coating is a new type of white swimming coating developed after cathodic and anodic electrophoretic coating. Its characteristics are that it uses water as the dispersion system, does not contain any organic solvents, complies with international management regulations, and is conducive to environmental protection

adhesive coating is a kind of polymer film coated with color coating and binder. Because of its good durability and weather resistance, it can be easily pasted on the outer surface of the barrel. Because it replaces solvent based liquid coating, it belongs to environmental protection coating

powder coating has achieved solvent-free dry coating production for the first time, fundamentally eliminating the dispersion of harmful solvents, and the powder sprayed can be recycled. It not only has good coating quality and high efficiency, but also reduces or eliminates environmental pollution, improves working conditions and saves energy, which is a new trend in the development of steel barrel coating

improvement of steel barrel production process

due to the limitations of equipment and technology, there are still a large number of processes that are not conducive to environmental protection in the production process of most barrel factories in China. Some are not recognized by people, and some are even promoted as advanced technology. Some have set up corresponding environmental protection facilities, but they have been idle for a long time. This situation will gradually improve with the improvement of national awareness of environmental protection and technological progress

improvement of barrel body welding edge treatment process

barrel body welding edge treatment is to pretreat the lap joint of barrel body plate before seam welding, and its purpose is mainly to eliminate oxides, oil stains, etc. on the lap edge, so as to facilitate seam welding. At present, the main process method in China is edge grinding, that is, grinding the welding edge with a group grinder

people who see edging production with their own eyes will be shocked, because the working environment here is too bad, deafening noise, dust, toxic gas... Such a working environment, the environmental protection department often requires rectification as soon as possible

in recent years, a variety of new welding edge treatment processes have emerged in China, such as edge milling process, cleaning process, flexible grinding wheel edge grinding process, fully automatic high-frequency welding process, etc. The milling process and cleaning process eliminate noise and dust, but the cleaning process will produce toxic and harmful gases due to the corrosion of oxides and oil stains on the welding edge by hydrochloric acid, and there is also the problem of cleaning waste liquid, which is still detrimental to environmental protection. Only the fully automatic high-frequency welding process saves the processing process, which not only reduces the labor intensity, reduces the production cost, but also reduces the environmental pollution

improvement of coating production technology

steel barrel coating is the most harmful link to the environment in the process of steel barrel production. A large amount of waste gas, waste water and waste residue (three wastes) produced by steel barrel coating mainly come from chemical treatments such as surface degreasing, derusting, phosphating and passivation before coating, as well as the flying of organic solvents and paint mist during coating, solvent volatilization during coating drying, etc

if the three wastes in the coating process are not effectively treated, the harm to the environment and operators is serious. In the past, the treatment of the three wastes in China was remedial, which made the environmental protection work fall into a vicious circle of pollution before treatment. Therefore, adopting pollution-free or low pollution production technology is the real way out. At present, the environmental protection coating technology at home and abroad has developed rapidly. Now, a variety of advanced coating methods such as high-pressure airless spraying, electrophoretic spraying, electrostatic spraying and powder coating, which are mechanized and automated assembly lines, have been widely used. In these modern advanced coating methods, the technologies of automatic coating and robot operation controlled by microcomputer program and closed-circuit motor are introduced. The new coating and diluent with high protection, high decoration, low toxicity and low pollution are matched with the coating methods of dip coating, spray coating, roll coating, light curing and radiation curing coating produced by semi mechanized, mechanized and automated assembly lines. With the large number of new technologies and processes, the pollution caused by the steel barrel production process is gradually reducing

environmental protection problems in the use of steel drums

due to the improper use of steel drums, environmental pollution is often caused. Most of our common pollution causes are caused by improper selection of steel barrel types and unreasonable storage and transportation methods

compatibility of steel barrel materials

there may be compatibility problems when some materials are contained in steel barrels. Commonly seen problems include internal coating, sealant and sealing ring

the inner coating, sealant and sealing ring shall be compatible with the contents and shall not react. If incompatible, the contents will be polluted and the sealing performance of the steel barrel will be lost, resulting in unpredictable consequences. Many cases of serious seawater pollution caused by the leakage of a large number of chemical substances on the sea cargo are caused by compatibility problems. Therefore, when producing and ordering steel drum packaged products, both parties should clarify this problem to avoid irreparable consequences

environmental protection during storage and transportation

the leakage of steel drums in use is mostly related to uncivilized loading and unloading. Due to improper loading and unloading, the steel drum collides, falls, deforms and leaks, resulting in pollution. At present, some domestic enterprises have adopted automatic assembly line operation for the filling and decoration of steel drums, thus reducing the leakage pollution caused by man-made uncivilized loading and unloading

steel drums should be stored and transported correctly. It is not allowed to put the steel drums in the open air, especially not allowed to put the steel drums vertically in the open air, that is, the barrel mouth is upward. When the steel barrel is placed in the open air, in addition to the damage to the steel barrel due to wind, sun and rain, what is more important is the influence of thermal expansion and contraction on the sealing performance of the steel barrel. In addition, when standing in the open air, it is easy to accumulate water on the top of the barrel and penetrate into the barrel through the poorly sealed barrel mouth, causing content pollution. When the contents are polluted and cannot be used, they become new waste

recycling of waste steel drums

there are generally two methods for recycling waste steel drums. One is to continue to use the waste steel drums after cleaning, paint removal, shaping and re coating; The second is to use the old barrel board to manufacture other products

old barrel renovation and environmental protection

at present, domestic enterprises engaged in old barrel renovation are gradually increasing, and technology and equipment are also being developed, but the main problem is that there are still a large number of three wastes in the cleaning, paint removal and recoating processes. At present, the three wastes treatment technology is quite mature. As long as we pay attention to treatment, environmental pollution can be better controlled

the environmental protection effect of mechanical method is significantly better than that of chemical method; The environmental protection effect of the cleaning process of reusing and discharging residual waste liquid is also significantly better than that of direct discharge. Therefore, whether the treatment methods of three wastes are advanced or not is directly related to the effect of environmental protection

make other products with old barrels and slabs

some enterprises chisel and flatten old barrels in today's rapid development of the construction industry, and use stamping and other methods to make other products. Some will make plates into barrels with smaller capacity, etc. In the process of recycling, if the waste board still needs cleaning and paint removal, attention should be paid to the treatment of the three wastes to reduce the pollution to the environment

information source: Packaging Papers

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