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When it comes to air pollution, the most widely known is PM2.
5
.
In recent years, the concentration of PM2.
Relying on the important technological support and industry leading role in the in-depth treatment of industrial flue gas and air pollution control, Tsinghua University, China Metallurgical Changtian International Engineering Co.
, Ltd.
and other companies have jointly completed industrial flue gas multi-pollutant collaborative deep treatment technology and application projects.
Won the first prize of the 2020 National Science and Technology Progress Award
.
Around 2013, non-electric industries with high production capacity and large emissions, including industrial sectors such as steel, building materials, and coking, became the biggest “culprit” of smog pollution in China
.
In order to win the battle to defend the blue sky, the project team faced the major national needs of China's iron and steel, building materials and other industries for flue gas upgrading and transformation, and proposed complex and in-depth treatment of unconventional pollutants such as sulfur, nitrate, dust, conventional pollutants, and mercury.
The core material of this technology is activated carbon for desulfurization and denitration and its catalyst products
.
Desulfurization and denitration activated carbon products are an important branch of the activated carbon series
China North Industries Corporation Shanxi Xinhua Chemical Defense Equipment Research Institute Co.
, Ltd.
undertook the development of activated carbon for desulfurization and denitration and carbon-based multifunctional materials, as well as small-scale, pilot-scale, and large-scale industrial production, and completed the removal of sulfur dioxide and nitrogen oxides in conjunction with Tsinghua University.
Major theoretical breakthroughs and rich results have been obtained in the study of mechanism, activated carbon adsorption and process flow
.
Activated carbon removes nitrogen oxides through catalytic reduction, and the denitration efficiency reaches 60%~70%; through adsorption to remove dioxins, the removal rate reaches 95%; through adsorption and oxidation to remove heavy metals, the removal rate reaches 90%
In 2014, Shanxi Xinhua Chemical Defense Equipment Research Institute provided more than 70 tons of carbon-based adsorbent materials for pilot and industrial application tests at Baosteel, and a set of 30,000 standard cubic meters per hour medium-sized industrial application device was operated
.
The operating results show that the various indicators meet or exceed similar foreign technical indicators
Another core material of the award-winning project, the dual-function catalyst is impregnated with related chemicals in the desulfurization and denitrification carbon, and the desulfurization performance of the product is greatly improved, and the denitrification efficiency is doubled at the same time
.
Its formula design, simulation, process design, parameter setting, sample trial production, test verification and other stages are critical
Because the desulfurization and denitration activated carbon has high abrasion resistance and compression strength and unique pore structure, there are not many chemical components in the desulfurization and denitration activated carbon impregnated by the solution, resulting in a relative increase in the particle surface and superficial layer, so rotary drying and moving Bed applications are two unfavorable processing and use conditions
.
To this end, members of the project team produced an electronically controlled vertical high-temperature dryer, which solved the problem of processing conditions
Compared with the traditional domestic technology, this project has truly realized the simultaneous removal of multiple pollutants and the resource utilization of by-products, and it has better cost performance and lower carbon emissions
.
Compared with similar foreign technologies, the removal efficiency is higher, the investment is reduced by about 40%, the operating cost is lower, and the overall technology has reached the international leading level
At present, this technology has been listed first in the category of atmospheric prevention and control in the "Catalogue of Major Environmental Protection Technology and Equipment Encouraged by the State" issued by the Ministry of Industry and Information Technology, and won the Ministry of Education Science and Technology Progress Special Award and the China Environmental Protection Industry Association Special Environmental Science and Technology Progress Award in 2019.
Award
.