Especially in Gucheng Tailong, although there is no mandatory requirement for ultra-low emission in Hubei, the enterprise still upholds the concept of green development of Tailong Group and achieves ultra-low emission of pollutants. According to Guo Yan, Gucheng Tailong has achieved dust and sulfur dioxide emissions of less than 10 mg/m ³ and nitrogen oxide emissions of less than 50 mg/m ³.
It is worth mentioning that in terms of the most difficult treatment of nitrogen oxides, unlike many domestic cement enterprises that choose the "simple and crude" end treatment method, Tailong Cement's treatment ideas are more worthy of reference.
Guo Yan: "The generation of nitrogen oxides is inevitable. The current end treatment methods mainly include SCR and SNCR, but these two treatment methods will consume ammonia, and the production of ammonia will also consume a lot of resources and emit pollutants.".
Therefore, Guo Shuo believes that the emission reduction of nitrogen oxides in cement enterprises should first pay attention to the front-end treatment, reduce the generation of nitrogen oxides from the source, and then adopt SCR, SNCR and other end-treatment methods when the front-end treatment can not achieve ultra-low emissions.
In the process of nitrogen oxide treatment, Tailong Cement has perfectly practiced this idea. Nitrogen reduction technologies such as low-carbon burners and staged combustion are selected at the front end, while the number of coal injection pipes is increased at the effective position in the calciner, and the layout of coal injection pipes is optimized. Through a series of optimization of the burning system, the initial emission of nitrogen oxides is minimized.
environmental protection is not only a cost, but also a responsibility.". In addition to pollutant treatment, Tailong Group invests a lot of money in environmental treatment of mines and factories every year. Thanks to continuous investment in environmental protection, today's Tailong Cement has been transformed into a garden-style factory.
Reducing energy consumption and enhancing market competitiveness
Energy cost is a key component of cement production cost.
Taking coal as an example, the cost of coal accounts for 50% -70% of the cost of cement production. If the energy consumption per ton of clinker is 150 kg of physical coal, the cost of clinker will increase by about 15 yuan for every 100 yuan increase in the price of coal.
In 2022, due to the imbalance between supply and demand in the market, there are two peaks in the coal price, one is that the coal price continued to rebound from January to March and reached the highest point of the year, reaching 1669 yuan/ton; the other is that the price was 1620 yuan/ton at the end of October. The annual average price of coal in China is about 1280 yuan/ton, so the cost of coal per ton of clinker is close to 200 yuan.
At the peak of coal price in 2022, the cost of coal accounts for two-thirds of the total production cost of cement. Reducing energy consumption is not only the need to reduce resource consumption, but also can directly reduce the production cost of cement enterprises and enhance market competitiveness.
"Energy saving and consumption reduction is the key to sustainable development of enterprises, but also the core of reducing production costs and enhancing market competitiveness, especially in the current market environment, energy saving and consumption reduction is very important." Guo Shuo pointed out that in recent years, in order to reduce the energy consumption of enterprises, Tailong Cement has done a lot of work in saving electricity and coal.
According to Guo Yan, Tailong Cement will continue to strengthen the renewal and management of electrical equipment in the plant, and tap the potential of power saving through continuous optimization and upgrading. In terms of coal
saving, Tailong Cement has established hardware conditions for energy saving and consumption reduction by optimizing the layout of coal injection pipes, improving the thermal insulation performance of the firing system and improving the heat recovery efficiency of the system; At the same time, in terms of operation, we focus on training the technical level of employees, and according to the flame state, the change of raw materials and fuels and other working conditions, combined with expert optimization system to reduce production energy consumption.
Thanks to the continuous efforts in the field of energy saving and consumption reduction, the energy efficiency technical indicators of Tailong Cement are at the advanced level in the industry.
Cement is known as the "grain" of the construction industry, which is very important to ensure the quality of construction.
In the past, some cement enterprises simply emphasized the early strength in terms of cement quality, and tried to improve the fineness of cement, resulting in high hydration heat and large water demand of cement. Although the early strength was improved, it was easy to crack, and the adaptability of cement was reduced, and the later strength was insufficient, which was not conducive to the improvement of building quality.
Guo Yan: "As an important basic building material product, cement involves the quality and safety of buildings, so we attach great importance to the quality of cement. In Tailong Cement, the pursuit of quality is cost-free.". According to Guo Yan, in terms of cement quality control, improving cement strength is only one aspect, and more attention should be paid to the balance of cement quality to provide downstream customers with cement products that best meet the construction requirements.
For this reason, Tailong cement has the characteristics of high strength, low water demand, low hydration heat, high adaptability and durability.
Guo Yan: "Cement quality must not only look at a certain aspect of the indicators, must be considered comprehensively, not only to ensure the balance of the indicators, but also to maintain stability and avoid quality fluctuations", and in order to ensure the stability of product quality, Tailong Cement from mining, batching, pre-homogenization, calcination to clinker cooling. Cement grinding and other links have achieved the fine control of the whole process.
Thanks to good quality, Tailong Cement has a good reputation in the regional market, and a large number of cement products are used in major national construction projects.
Future Road: Green Development and Intelligent Manufacturing
"The subject of energy conservation and environmental protection is endless, which requires our enterprises to continue to explore and optimize in the future. Green and intelligent development is our core development direction in the future," Guo Yan said.
After the "double carbon" goal has been raised to the national strategic goal and incorporated into the "14th Five-Year Plan", the cement industry, as a major carbon emitter, must develop low-carbon.
On the one hand, the coal consumption and power consumption are reduced through the production line technology upgrade and continuous system optimization; on the other hand, the raw material batching link is optimized to reduce carbon emissions. In this regard, a lot of research has been done at home and abroad, and certain results have been achieved, which is believed to play an important role in reducing resource consumption and carbon emissions in the cement industry in the future.
At the same time, Guo also said that the current rapid development of automation and intelligent technology in the cement industry is expected to play a key role in reducing energy consumption and pollutant emissions for enterprises and helping the industry achieve green development in the future. For example, based on the application of intelligent laboratory, cement enterprises can take quality control as a breakthrough point, plan whole process control from mining to cement grinding as a whole, and greatly improve the fine management level of each production link of enterprises. In addition, the application of the expert optimization control system will greatly improve the efficiency of the firing system and greatly reduce the production energy consumption of the enterprise; the application of the unmanned loading system will greatly reduce the work intensity of workers, improve the delivery efficiency, and fundamentally avoid occupational hazards.
Guo Yan said that the cement industry is ushering in a critical period of technological upgrading, and the application of a large number of intelligent technologies will greatly change the face of cement enterprises. Tailong Cement will promote the intelligent upgrading of enterprises in a timely manner based on comprehensive attention and consideration of the development progress of relevant technologies.
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