The use of fossil energy is often accompanied by a large amount of carbon emissions, and has become a key area of carbon emission reduction. How to use fossil energy while achieving energy saving, carbon reduction and even recycling is a university question. On April 29, the theme interview activity of "Walking in the Pilot Zone to See Green, Low-Carbon and High-quality Development" walked into Xinfa Group in Liaocheng to understand how enterprises can achieve energy conservation and carbon reduction by doing a good job in circular economy.
In Xinfa Modern Agricultural Industrial Park, four strawberry glass intelligent greenhouses of about 150 acres are blowing air conditioners. As the weather got hotter and the greenhouse temperature exceeded the optimal temperature for strawberry growth, the staff began to cool the greenhouse.
It is reported that the unique greenhouse heating and cooling function of the strawberry glass intelligent greenhouse can make the strawberries here go on the market in advance and extend the picking period by 3 to 4 months, and the output is more than 5 times that of the ordinary glass greenhouse, and the energy of the control greenhouse comes from the industrial waste heat of Xinfa Group.
In the cherry planting demonstration facility greenhouse in the agricultural industrial park, the big cherries are delicate. Through 11 intelligent control functions such as heating or cooling, supplemental lighting, and carbon dioxide supplementation, the large cherries here can be produced all year round, with an annual output of 3 million catties.
Liu Liping, technical director of Xinfa Group Agriculture Co., Ltd., told reporters that the walls of the cherry greenhouses are all made of fly ash of power plants, and the carbon dioxide supplemented by cherry growth is also captured from the exhaust gas emitted by coal-fired power plants.
The industrial waste heat, carbon dioxide and environmental protection blocks used in the agricultural industrial park all come from the industrial projects of Xinfa Group. Li Lei, head of the carbon and nitrogen joint project of Xinfa Group, said that in view of the current situation that fossil energy cannot be completely replaced, the group has invested in the construction of a boiler flue gas CCUS project with an annual output of 300,000 tons of carbon and nitrogen co-generation. The project adopts energy-saving technologies such as synchronous recovery of carbon dioxide and nitrogen, a large amount of waste heat recovery, and residual pressure recovery, "nitrogen is used for protection and replacement of chemical enterprises in the industrial park, and carbon dioxide is used for agricultural smart greenhouse projects." It realizes the cascade utilization and effective recovery of energy, greatly improves the energy utilization efficiency, and reduces the 'secondary carbon emissions' in the operation process. ”
How to deal with the solid waste generated by the use of fossil energy?" Bai Guolin, the person in charge of the new environmental protection building materials project of Xinfa Group, introduced that Xinfa Group vigorously develops the circular economy, increases the comprehensive utilization of solid waste, and uses the fly ash and desulfurization gypsum discharged from the power plant to build four 4 million cubic block production lines.
The reporter saw in the block project of Xinyuan Environmental Protection Building Materials Co., Ltd., a subsidiary of Xinfa Group, that the fly ash and desulfurization gypsum that were originally treated as solid waste have become the raw materials of the block production line, and the blocks have been produced through a certain proportion of mixed grouting, steaming, cutting and other processes.
"This block is a new type of energy-saving wall material, which has the effect of small bulk density, heat preservation, heat insulation, energy saving, and sound insulation, and can be used to build buildings. Bai Guolin introduced that at present, block products are also used in cherry planting greenhouses, which not only increases the land utilization rate to more than 93.3%, but also greatly extends the service life of greenhouses.
Xinfa Group's circular economy is not only that. Limestone is used to produce lime, lime is used to produce calcium carbide, calcium carbide is produced to produce polyvinyl chloride, and the waste calcium carbide mud produced by the production of polyvinyl chloride can replace lime to produce alumina, and at the same time replace lime for efficient desulfurization of power plants, and the waste desulfurization gypsum produced by desulfurization is used to produce gypsum powder, which can be widely used in the manufacture of building materials, so as to realize the six cycles of small stones. In addition to the six cycles of pebbles, Xinfa Group has also realized cogeneration, which not only supplies electricity and heat to processes such as alumina and electrolytic aluminum and industrial parks, but also provides heating to urban residents. Today, this circular chain has expanded beyond industry to a wider range of fields such as agriculture.
"The waste gas, waste water, and solid waste generated in the production process of the previous enterprise can be turned into the energy and raw materials required for the production of the next enterprise, and the secret of the circular economy is to turn waste into treasure. Zhang Xuexin, chairman of the board of directors of Xinfa Group, once introduced the circular economy of the enterprise.
(Popular Daily, Popular News Client Reporter Xiu Congtao, Yu Xinyue, Zhang Huanchen, Planner, Ma Yufeng)