Ceramic production link dust emissions will be reduced by 80%

Industry and media visited the production workshop of lysozhou no.2 factory for the preparation of ceramic powder by energy-saving dry method. Meng Weishe

Foshan ceramic enterprises in guangdong province, working with universities and institutes, have invented a new technology and related equipment, which will make the ceramic industry bid farewell to the "spray tower" and significantly reduce the energy consumption and pollution level of the ceramic industry. On June 21, China building materials association organized the appraisal of the scientific and technological achievements of the project "ceramic powder energy-saving dry preparation technology and complete set of equipment". The meeting thought that the comprehensive technology of this achievement reached the level, which is significant for the introduction of China's ceramic industry upgrading.

This lasted six years, by foshan dissolved state building ceramics factory joint of south China university of technology, Chinese Academy of Sciences and other colleges and universities jointly breached the technology and equipment has more than a dozen, the technology from the cost of investment, only for the traditional use of 60% of the spray drying powder production technology, but the application of this technology not only can let the spray tower "trace", make ceramic production environment of dust emissions fell by 80%, will also gave rise to a 26 billion environmental protection equipment market.

Cross - boundary innovation leads to the change of pulverizing process

The breakthrough of this key environmental protection technology in the ceramic industry originated from a "ridiculous" idea of luo shufen, assistant to the chairman of foshan city rongzhou construction ceramics co., LTD. (hereinafter referred to as "rongzhou no.2 factory").

For a long time, the wet powder technology of ceramic powder made of spray tower powder is a section with high energy consumption and heavy exhaust pollution in the production of building ceramics, and also a key link restricting the realization of clean production of building ceramics. There are many environmental pollution problems in this link, such as large amount of water, large amount of energy consumption, large amount of dust and large amount of sulfur dioxide and nitrogen oxide emissions.

One day in 2008, luo shufen suddenly had an idea in front of a pile of broken waste residue: "why must I wet the powder, can I not wet it?" She ran up to the professor with what she thought was a "ridiculous" idea and was told it was "totally achievable".

Encouraged, ms luo set about research and development. "The first developed reference is actually a capsule." 'if the powder can be made into particles without getting wet, why not ceramic materials?' she said.

Inspired by the capsules, the equipment used to make granules from the powder was placed in the research laboratory of the second plant. In fact, except for the reference capsule. In this dry granulation technique, many crossover elements are added. "We introduced the homogenization technology from the cement industry, and the crushing technology is based on the practice of the mining industry." Luo shufen says that with the integration of this crossover technology, the prototype of dry powder is beginning to emerge.

In the process of introducing crossover technology, luo shufen et al. continuously improved the tonnage and yield of equipment. So far, the granulator's tonnage has been increased to 2 tons.

From the perspective of the use effect of the entire technology and equipment, the second lysozhou factory developed and used the demonstration production line of this technology in 2012. In addition to the limitation of small capacity scale, the production line has a very strong production adaptability, and it is easy to adjust the powder required by various ceramic products, as well as a variety of color powder. It can be used as the production line of the main raw material processing workshop of small enterprises, and also as the color powder processing workshop of large enterprises.

As one of a group of users of this technology, some ceramic enterprise, located in nanhai district, foshan city, head Chang Rui in last January to dissolve two factory bought more than 350 tons with dry powder of legal system of ceramic powder, after use, he says use of the technology in building ceramic powder, in production when using liquidity is very good, suitable for press forming, strength and ordinary spray tower use effect is the same.

"In other words, one of the great things about this technology is that it allows ceramic companies to say goodbye to spray towers." Foshan city science and technology bureau deputy director li ju zhen said.

Dust emissions were reduced by 80%

10 billion environmental equipment market

This huge environmental benefit is based on the lower cost compared to the traditional wet process. According to luo, the dry powder requires less production equipment, and the investment is only 60% of the production technology of spray drying powder.

Less investment can achieve more obvious energy conservation and emission reduction effect. Luo sf said, compared with the spray drying powder to evaporate moisture content 31% - 35% of the slurry water, for water content is only 6% - 8% of the powder, dry powder production technology of legal system will only water content about 12% - 14% of the dry powder into water content 6% - 8% of the powder, a legal system that is dry powder production system of spray drying powder production technology to save energy and water 35% and 60% - 80%.

And once this technology can be widely used in the country, according to the current national building ceramic wall tile production of 8.992 billion square meters per year, can successfully save 35 percent of energy. If calculated according to the production time of 300 days in a year, it can save about 4.98 million tons of standard coal and 90.425 million tons of water. As a result, 13.44 million tons of carbon dioxide, 42,300 tons of sulfur dioxide, 36,800 tons of nitrogen oxides and 7,841 tons of atmospheric dust could be reduced each year.

Under the background that environmental protection is paid more and more attention, li juzhen believes that the breakthrough of energy-saving dry preparation technology and complete set of equipment for ceramic powder provides a good support for the survival and environmental protection of ceramic enterprises.

In addition, as the technology and equipment can gradually break through the production line system problems that adapt to different production capacity specifications, with the current average market price of 26 million yuan per set of equipment, according to the national ceramic enterprises 1000 spray tower production line calculation, will produce a ceramic environmental protection equipment market of 26 billion yuan.

"If this technology can be fully promoted in China, the economic benefits will be huge according to the size of China's ceramic power." "Said wu yiyue, chairman of the building materials industry association of guangdong province.