Study On Low-carbon Manufacturing System Mode And Its Assessment Methodology

Low-carbon manufacturing is a new manufacturing model, committing to the efficient use of energy and resources, thus reducing the carbon emission intensity of the whole life cycle, and emphasizing the carbon emissions reduction and control in the whole life cycle, from the raw material acquisition, energy production, product design, manufacture, use to scrap. Low-carbon is one fundamental way to relieve the pressure of national manufacturing, meeting the national responses to climate change and major projects, the development of circular economy, the implementation of energy-saving and emission-reduction development strategies. For the characteristics of the ceramic enterprises, the high energy consumption, high materials consumption and high emission, the promotion of the implementation of low-carbon manufacturing system model is very significant. This paper is proposed based on a series of scientific problems encountered in the implementation of low-carbon manufacturing system model in ceramic enterprises, and studies the low-carbon manufacturing system model of ceramic enterprises and supported technology.Firstly, based on the analysis of the current situation with high energy consumption, high emission of ceramic enterprises, the low-carbon manufacturing system of ceramic enterprises is proposed. From the view of the material flow, energy flow, the connotation of the low-carbon manufacturing system of ceramic enterprises is expounded. The overall framework of low-carbon manufacturing system model of ceramic enterprises is established, focusing on the whole life cycle of ceramic product and including four-story structure, such as the goal layer, energy conservation strategy layer, the life cycle layer and support layer, then focus on the analysis of the goal layer, energy conservation strategy layer, the life cycle layer and support layer respectively. For providing a method for decision analysis on the implementation of low-carbon manufacturing system of ceramic enterprises, a decision-making framework model of low-carbon manufacturing system of ceramic enterprises is established with the target of carbon emissions, time, quality and cost.Secondly, based on the proposed low-carbon manufacturing system model of ceramic enterprises, the carbon emissions characteristics of ceramic product life cycle and the assessment techniques for carbon footprint are studied. Recalling the concept of carbon footprint and the basic theory of carbon footprint methods and life cycle assessment evaluation methods, and calculating the carbon emission factors of primary energy and secondary energy used in China and common materials of ceramic production, based on the theory of life cycle. The material balance model and energy balance model of ceramic enterprises are established for the quantifying the material and energy consumption of ceramic enterprises. Based on the carbon emissions factors of material and energy and the balance models of material and energy consumption, a new calculation method of carbon footprint of ceramic products is proposed, then, used to the analysis of carbon footprint of ceramic products.Thirdly, for the characteristics that ceramic enterprises are the typical process-based industries and the modeling requirement of low-carbon manufacturing of ceramic enterprises, and according to the basic theory of fuzzy Petri nets, seizing the continuity of its running state and the effects of its discrete state on continuous process, the fuzzy Petri nets is applied to the modeling of low-carbon manufacturing process of ceramic enterprises successfully. This paper introduces the basic principles of Petri nets and gives the formal definition and rule description. According to the characteristics of ceramic production process, the fuzzy Petri nets framework model of production of enterprises and associated nested sub-models are established. The production process, resource allocation, waste heat recycling can be integrated by this model. For the foundation of the implementation of low-carbon manufacturing in enterprises, illustrating the application of this model with an example, the typical ceramic firing system, simulating the dynamic behavior of energy consumption of ceramic enterprises and highlighting the value of the model.Finally, the low-carbon manufacturing system of ceramic enterprises and key technology are preliminarily applied in a ceramic company in Jiangxi, achieving good results and providing guidance and reference to the implementation of low-carbon manufacturing in ceramic enterprises.