Low-corrosive snow melting agents gradually recognized
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It is understood that the low cost of sodium chloride and urea as the snow melting agent caused by road and bridge corrosion has become more and more concerned. In recent years, local companies have made great efforts to develop and promote low-corrosive snow melting agent products. However, a large part of these products are exported to foreign countries. The users of major snowmelt decontamination companies in the country are concentrated in the United States, Europe, Japan, and other countries and regions. The promotion in the domestic market is not yet widespread enough.
"Not our products are not good, but the price and cost factors have hindered the promotion of products with environmental performance," Wang Xiling said. The person in charge of Tangshan Jieyou Fine Biochemical Co., Ltd. said in an interview with reporters that calcium chloride snow-melting agents containing inhibitors and other substances are significantly superior to industrial salts in terms of snow-melting time, effect, and environmental performance. This part of the additive accounted for most of the cost of the product, resulting in higher prices. If there is no local government's strong support, it is difficult to get promotion.
According to report, snow-melting agents containing calcium chloride as the main ingredient currently include corrosion inhibitors and additives that can make plants salt-tolerant. This kind of product, which is called “environmental snow melting agentâ€, has become the mainstream product of the production companies. Since Beijing formulated the local standard for snow melting agent in 2002, the compliance standard for selecting related products is environmental performance. This year, in accordance with the list of products recommended by Beijing for the use of snow melting agents, the 21 products of 13 companies are mostly products containing additives such as corrosion inhibitors. Although this type of product has not reached a completely non-corrosive, non-polluting level, significant progress has been made relative to traditional industrial salt and urea. Shenyang and other places have used this type of product as the main snow melting agent for snow removal on the urban pavement.
The company's feedback shows that the domestic snow melting agent market has great potential to be tapped. Compared with last year, the sales volume of snowmelt products containing additives such as corrosion inhibitors has further increased this year, and products with strong environmental performance have become the focus of choice in various regions. The relevant person in charge of Weifang Changda Chemical Co., Ltd. stated that although the company's snow melting agent products are mainly export-oriented, in recent years, the development of the domestic market has been intensified, and the application of the products in the northern regions has expanded. Moreover, since the company obtained a patent for a snow melting agent product in 2002, the domestic sales of the product have increased year by year and are expected to increase by 2% to 3% this year. At present, Beijing, Hebei, Shandong and other places have successively put forward requirements for ensuring the reserve of snowmelt agent products.
Wang Xiling said that with the increase in the environmental performance requirements for snow melting agents in China in recent years, the traditional method of sodium salt snow is gradually being replaced by calcium chloride, and the use of snow melting agents is gradually shifting from the original salt snow melting agent to low salt. And halogen-free snow melting agent conversion. However, highly environmental-friendly organic snow melting agents are currently only used in airports, golf courses, and other areas. Due to price and other reasons, they have not yet been widely promoted. Urban roads mainly use snow melting agent products recommended by the government, and are still mainly based on chloride. . Chloride is hardly a perfect environmental product. It is still corrosive. Scientific and rational application is the key to reducing the environmental damage caused by snow melting agents.
The person in charge of Tangshan Jieyou Fine Biochemical Co., Ltd. stated that as long as the application method is reasonable, it can be cleaned in a timely manner. The low-corrosive products can significantly reduce the harm of the snow melting agent to the environment and achieve the environmental protection effect.
According to the Wang Researcher of the Urban Greening Department of the Beijing Municipal Bureau of Landscape and Landscaping, in the past two years, the environmental performance of chlorine salt snow melting products has been continuously strengthened, and the impact on the environment and plants has been continuously reduced, but after all, it is still a chemical product, after sowing. It's impossible to say that no influence is necessary. The trees must be shielded when necessary.
Researcher Wang told reporters that the Landscaping Bureau will take effective measures for the use of snow melting agents on a large number of roads, such as city roads, to regulate the application of snow melting agents, minimize the use of snow melting agents and harm to garden plants. This year, they established the operating standards for snow melting agents used on roads, that is, they should be at least 1 to 1.5 meters away from tree pools or green areas when sprayed with snow melting agents to avoid directly spraying snow melting agents into tree pools to contaminate soil or cause direct damage to garden plants. . In particular, it is strictly forbidden to store residual snow containing residual snow melting agent in tree pools or green areas, and to eliminate or minimize the use of snow melting agents on pedestrian walkways, on the edge of green areas, in residential quarters, and in unit gardens. Beijing Sanitation Group is currently the main operating unit for road cleaning work. According to Zhang Zhiqiang, head of the Group’s operations department, they are currently spreading snow melting agents scientifically in accordance with the standard of no more than 10 grams of snow melting agent per square meter of road.