CN108300415B - High-efficiency multifunctional environment-friendly formate snow-melting agent - Google Patents
High-efficiency multifunctional environment-friendly formate snow-melting agent Download PDFInfo
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- CN108300415B CN108300415B CN201810149349.XA CN201810149349A CN108300415B CN 108300415 B CN108300415 B CN 108300415B CN 201810149349 A CN201810149349 A CN 201810149349A CN 108300415 B CN108300415 B CN 108300415B
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Abstract
The invention relates to an efficient multifunctional environment-friendly formate snow-melting agent, belonging to the field of chemical salt. The environment-friendly snow-melting agent is prepared by taking formate as a main raw material and mainly comprising sodium formate, calcium formate and calcium nitrate which are mixed according to a certain proportion and a small amount of corrosion inhibitor. The formate snow-melting agent has good snow-melting effect and low freezing point, and can be used at the low temperature of minus 35 ℃. The product does not contain substances harmful to the environment, such as chloride ions and the like, and has low corrosion to the road surface and the bridge surface. And the solution formed by the snow melting agent after snow melting is rich in various trace elements such as calcium element, nitrogen element and the like which can provide nutrition for green lands and plants. Compared with the common environment-friendly snow-melting agent, the formate of the main raw material of the snow-melting agent also has price advantage compared with other raw materials of the environment-friendly snow-melting agent. And the preparation process of the formate snow-melting agent is simple, so that the product cost is very low, and the formate snow-melting agent has all favorable conditions for large-area popularization in the north of China.
Description
The technical field is as follows: the invention relates to an efficient multifunctional environment-friendly formate snow-melting agent and a preparation process and a preparation method thereof, belonging to the field of composite salt.
Background art: in the north of China, snowfall in winter is always a great hidden danger influencing urban traffic in winter. With the economic development of China, urban traffic is increasingly crowded, and how to solve the problem of ice and snow on the road surface in the northern China is a major topic.
Conventional snow removal methods currently include both mechanical snow removal and snow melting agents. But both of them have certain deficiencies, wherein mechanical snow removal has the problems of easy damage to the road surface or unclean cleaning, etc. The existing snow-melting agent is divided into two categories, one is a traditional chlorine salt snow-melting agent, the cost is low, the snow removal effect is good, but the snow-melting agent has strong corrosivity and can strongly damage road surfaces, bridge surfaces, airport runways and vegetation on two sides; the other is a novel environment-friendly snow-melting agent, and the existing environment-friendly snow-melting agent has the defects of high price and high freezing point although the corrosivity is lower than that of the traditional chlorine salt snow-melting agent, and is not suitable for large-scale popularization. With the rapid development of infrastructure construction in China, various large bridges, high-speed rails, highways and airport runway projects emerge endlessly, and in order to ensure that key projects of the kind can safely and efficiently remove snow and reduce the cost, an environment-friendly snow-melting agent with lower cost and high snow removal efficiency is urgently needed to be developed. The formate snow-melting agent provided by the invention can just meet the requirement.
The invention content is as follows:
the purpose of the invention is as follows: the invention relates to a high-efficiency multifunctional environment-friendly formate snow-melting agent, which aims to solve the problems of high corrosion of the traditional snow-melting agent and the problems of high cost, low freezing point, unsuitability for popularization and the like of the existing environment-friendly snow-melting agent.
The technical scheme is as follows:
an efficient multifunctional environment-friendly formate snow-melting agent is characterized in that:
the snow-melting agent is in the form of irregular particles with the diameter of 0.5mm to 5 mm;
comprises the following components in proportion:
the efficient multifunctional environment-friendly formate snow-melting agent is preferably:
the corrosion inhibitor comprises the following components in proportion:
the preparation method of the snow-melting agent is characterized by comprising the following steps:
the method comprises the following steps:
(1) taking the raw materials according to a certain proportion, and putting the raw materials into a special grinding machine for grinding;
(2) putting the powder into a stirrer for fully stirring to ensure that various materials are fully mixed and uniformly distributed;
(3) adding 2.5-5% of corrosion inhibitor into the mixed material, stirring uniformly, conveying to a granulator, curing and forming to reach the standard of irregular particles with the diameter of 0.5-5 mm, and finishing the preparation.
The advantages and effects are as follows:
compared with the traditional snow-melting agent, the snow-melting agent has the following advantages:
(1) the snow melting effect is good. The snow-melting agent has good water solubility, can generate a large amount of hydration heat after melting water, can quickly remove snow, and ensures that the problem of ice and snow on the road surface in the north is quickly solved.
(2) The freezing point is low. The snow-melting agent can be used at a low temperature of 35 ℃ below zero, and can ensure that the aqueous solution is not frozen and the side effect of melting snow into ice is not generated at the low temperature, so the snow-melting agent can be used in the most severe cold region.
(3) The environmental protection effect is good. Compared with the snow-melting agent commonly used at present, the snow-melting agent has low corrosion to the road surface and the bridge deck. In the process of melting snow on the metal bridge surface, a layer of oxidation film can be formed on the metal surface to protect the metal bridge surface, so that the corrosion of the metal bridge surface to the metal surface can be ignored. Meanwhile, strong acid radical ions are not contained in the solution after the snow is melted by the snow melting agent, so that the corrosion of the snow melting agent on a concrete pavement and a bridge deck can be ignored. And the solution formed by the snow melting agent after snow melting is rich in various trace elements such as calcium element, nitrogen element and the like which can provide nutrition for green lands and plants.
(4) The cost is low. Compared with the common environment-friendly snow-melting agent, the formate snow-melting agent not only has the characteristics of high snow-melting efficiency, lower corrosivity and the like, but also has the price advantage compared with the raw materials of other environment-friendly snow-melting agents. And the preparation process of the formate snow-melting agent is simple, so the cost is very low, and the formate snow-melting agent has all favorable conditions for large-area popularization in the north of China.
Description of the drawings:
FIG. 1 shows the preparation process of the snow-melting agent.
The specific implementation mode is as follows:
the working principle of the formate snow-melting agent is as follows:
the principle of the formate snow-melting agent for melting snow and ice is mainly that a large amount of heat can be released after the formate is melted and the snow and ice can be melted. After the formate is dissolved in water, the concentration of ions in the water increases, lowering the vapor pressure of the liquid phase of the water, but not the vapor pressure of the solid phase of the ice. In order to achieve a state where the vapor pressures of the solid phase and the liquid phase are equal when the ice-water mixture coexists in equilibrium, the ice melts. The formate snow-melting agent dissolves to lower the freezing point of the salt-containing snow water, and thus it is difficult to form ice cubes again after the salt is dissolved in the snow water. Thus, the secondary damage that the snow is melted into water and then is melted into ice can be prevented.
The formate snow-melting agent takes formate as a main raw material and mainly comprises sodium formate, calcium formate and calcium nitrate. During production, putting various raw materials into a special grinding machine in proportion for grinding; putting the powder into a stirrer for fully stirring to ensure that various materials are fully mixed and uniformly distributed; adding 2.5-5% of slow release agent into the mixed material, stirring uniformly, and then conveying to a granulator for solidification and forming to enable the mixed material to reach the standard of irregular particles with the diameter of 0.5-5 mm.
The formate snow-melting agent comprises the following components in percentage by weight:
the composition of the formate snow-melting agent is shown in table 1, and the components of the corrosion inhibitor are shown in table 2.
The high-efficiency multifunctional environment-friendly formate snow-melting agent is characterized in that: irregular particles with the diameter of 0.5mm to 5mm are prepared from the following raw materials: sodium formate (NaCOOH), calcium formate (Ca (COOH)2) Calcium nitrate (Ca (NO)3)2) And a corrosion inhibitor.
The corrosion inhibitor comprises the following components: sodium hexametaphosphate ((NaPO)3)6) Sodium molybdate (Na)2MoO4) Sodium metasilicate (Na)2SiO3) Thiourea (CH)4N2S), calcium hypochlorite (Ca (ClO)2) And sodium benzoate (C)6H5COONa)。
TABLE 1 composition ratio of formate snow-melting agent
TABLE 2 component ratios of corrosion inhibitors
Although the proportion of the corrosion inhibitor in the invention is small, the corrosion inhibitor can well protect the road surface and the bridge deck, and the snow-melting agent can become a green and environment-friendly product.
Preparation process
The general preparation process of the formate snow-melting agent is shown in the attached drawing. Taking the raw materials according to a certain proportion, and putting the raw materials into a special grinding machine for grinding; putting the powder into a stirrer for fully stirring to ensure that various materials are fully mixed and uniformly distributed; adding 2.5-5% of slow release agent into the mixed material, stirring uniformly, and then conveying to a granulator for solidification and forming to enable the mixed material to reach the standard of irregular particles with the diameter of 0.5-5 mm. The preparation of the present invention is completed.
The performance of the formate snow-melting agent is shown in the requirements of table 3.
TABLE 3 formate snow-melting agent Performance
The invention is illustrated below with reference to specific examples:
the high-efficiency multifunctional environment-friendly formate snow-melting agent is characterized in that: irregular particles with the diameter of 0.5mm to 5mm are prepared from the following raw materials: 70-85% of sodium formate (NaCOOH), 5-20% of calcium formate (Ca (COOH)2), 5-7.5% of calcium nitrate (Ca (NO3)2) and 2.5-5% of corrosion inhibitor.
The corrosion inhibitor comprises the following components: 25-30% of sodium hexametaphosphate ((NaPO3)6), 20-25% of sodium molybdate (Na2MoO4), 18-20% of sodium metasilicate (Na2SiO3), 10-12% of thiourea (CH4N2S), 10-12% of calcium hypochlorite (Ca (ClO)2) and 8-10% of sodium benzoate (C6H5 COONa).
Example 1
Weather: the lowest temperature of snow: -15 ℃ snow reduction: 1.8mm
Road conditions are as follows: on the provincial highway, the vegetation is dense on two sides, the road surface is provided with an ice and snow layer, and the traffic vehicles are dense on the road. The composition of the formate snow-melting agent in this example is shown in Table 4, and the composition of the corrosion inhibitor is shown in Table 5.
TABLE 4 composition ratio of formate snow-melting agent
TABLE 5 component ratios of corrosion inhibitors
Example 2
Weather: the lowest temperature of snow: -25 ℃ snow reduction: 2.0mm
Road conditions are as follows: on the expressway, vegetation on two sides is dense, an ice and snow layer is arranged on the road surface, and a plurality of vehicles are on the road. The composition of the formate snow-melting agent in this example is shown in Table 6, and the composition of the corrosion inhibitor is shown in Table 7.
TABLE 6 composition ratio of formate snow-melting agent
TABLE 7 component ratios of corrosion inhibitors
Example 3
Weather: the lowest temperature of snow: -35 ℃ snow reduction: 2.2mm
Road conditions are as follows: the urban road has dense vegetation on two sides, an ice and snow layer on the road surface and heavy traffic on the road. The composition of the formate snow-melting agent in this example is shown in Table 8, and the composition of the corrosion inhibitor is shown in Table 9.
TABLE 8 composition ratio of formate snow-melting agent
TABLE 9 component ratios of corrosion inhibitors
And (4) conclusion:
the formate snow-melting agent has a good snow-melting effect; the freezing point is low, the snow-melting agent can be used at the low temperature of 35 ℃ below zero, and the water solution can be ensured not to freeze at the low temperature; compared with the snow-melting agent commonly used at present, the snow-melting agent has low corrosion to the road surface and the bridge deck. In the process of melting snow on the metal bridge surface, a layer of oxidation film can be formed on the metal surface to protect the metal bridge surface, so that the corrosion of the metal bridge surface to the metal surface can be ignored. Meanwhile, strong acid radical ions are not contained in the solution after the snow is melted by the snow melting agent, so that the corrosion of the snow melting agent on a concrete pavement and a bridge deck can be ignored. And the production and preparation process is simple.
Compared with the common environment-friendly snow-melting agent, the formate snow-melting agent not only has the characteristics of high snow-melting efficiency, lower corrosivity and the like, but also has the price advantage compared with the raw materials of other environment-friendly snow-melting agents. Has wide application prospect.
Claims (2)
1. The high-efficiency multifunctional environment-friendly formate snow-melting agent comprises a corrosion inhibitor and is characterized in that:
the snow-melting agent is in the form of irregular particles with the diameter of 0.5mm to 5 mm;
comprises the following components in proportion:
70% -85% of sodium formate;
5% -20% of calcium formate;
5 to 7.5 percent of calcium nitrate;
2.5 to 5 percent of corrosion inhibitor;
the corrosion inhibitor comprises the following components in proportion:
25 to 30 percent of sodium hexametaphosphate;
20% -25% of sodium molybdate;
18 to 20 percent of sodium metasilicate;
10% -12% of thiourea;
10 to 12 percent of calcium hypochlorite;
8 to 10 percent of sodium benzoate.
2. A method for producing a snow-melting agent as claimed in claim 1, wherein:
the method comprises the following steps:
(1) taking the raw materials according to a certain proportion, and putting the raw materials into a special grinding machine for grinding;
(2) putting the powder into a stirrer for fully stirring to ensure that various materials are fully mixed and uniformly distributed;
(3) adding 2.5-5% of corrosion inhibitor into the mixed material, stirring uniformly, conveying to a granulator, curing and forming to reach the standard of irregular particles with the diameter of 0.5-5 mm, and finishing the preparation.
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| CN108300415B true CN108300415B (en) | 2020-07-03 |
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Citations (7)
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| CN1417283A (en) * | 2002-11-06 | 2003-05-14 | 天津渤海化工有限责任公司天津碱厂 | Snow thawing agent |
| CN1667080A (en) * | 2005-04-15 | 2005-09-14 | 杨毅男 | Ice-melting snow-removing agent |
| CN101735770A (en) * | 2008-11-18 | 2010-06-16 | 熊长宏 | Efficient composite anti-corrosive snow melt agent |
| CN102399534A (en) * | 2011-12-01 | 2012-04-04 | 北京化工大学 | Organic/inorganic composite environment-friendly snow melting agent and preparation method thereof |
| CN103342988A (en) * | 2013-07-04 | 2013-10-09 | 沈阳工业大学 | Environment-friendly snow melting agent and preparation method thereof |
| CN104073221A (en) * | 2014-06-25 | 2014-10-01 | 陕西省建筑材料工业设计研究院 | Environment-friendly non-chlorine-salt snow melting and deicing agent and preparation method thereof |
| CN106190034A (en) * | 2016-07-27 | 2016-12-07 | 中盐金坛盐化有限责任公司 | A kind of high-efficient corrosion inhibition type compound chloride-based type Snow Agent and preparation method thereof |
-
2018
- 2018-02-13 CN CN201810149349.XA patent/CN108300415B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1417283A (en) * | 2002-11-06 | 2003-05-14 | 天津渤海化工有限责任公司天津碱厂 | Snow thawing agent |
| CN1667080A (en) * | 2005-04-15 | 2005-09-14 | 杨毅男 | Ice-melting snow-removing agent |
| CN101735770A (en) * | 2008-11-18 | 2010-06-16 | 熊长宏 | Efficient composite anti-corrosive snow melt agent |
| CN102399534A (en) * | 2011-12-01 | 2012-04-04 | 北京化工大学 | Organic/inorganic composite environment-friendly snow melting agent and preparation method thereof |
| CN103342988A (en) * | 2013-07-04 | 2013-10-09 | 沈阳工业大学 | Environment-friendly snow melting agent and preparation method thereof |
| CN104073221A (en) * | 2014-06-25 | 2014-10-01 | 陕西省建筑材料工业设计研究院 | Environment-friendly non-chlorine-salt snow melting and deicing agent and preparation method thereof |
| CN106190034A (en) * | 2016-07-27 | 2016-12-07 | 中盐金坛盐化有限责任公司 | A kind of high-efficient corrosion inhibition type compound chloride-based type Snow Agent and preparation method thereof |
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