The development of chlor-alkali industry should seek both internal and external harmony

China has surpassed the United States as the largest producer of chlor-alkali industry, but there is still a certain distance from the goal of a chloro-alkali powerhouse. The chlor-alkali industry is not only an important basic chemical raw material industry, but also an industry that has high energy consumption and has a certain impact on the environment. Therefore, it is of utmost importance to seek the harmonious development of the industry. The harmonious development of the chlor-alkali industry mainly includes external harmony and internal harmony.
The external harmony of the chlor-alkali industry is first and foremost the harmony between the development of the industry and the development of resources and environmental protection. The chlor-alkali industry is a traditional resource conversion industry. China's energy shortage in general, while the chlor-alkali industry consumes a lot of energy in the production process, in addition, calcium carbide calcium carbide slurry slurry, excessive crude vinyl chloride in the production process Emissions of waste acids from hydrochloric acid and water washing with hydrogen chloride, fractionation of vinyl chloride and tail gas emissions from polymerization, and soot emissions all have a considerable impact on the environment. Therefore, the development of the chlor-alkali industry must promote the recycling economy. As the first batch of circular economy pilot units in the industry, Xinjiang Tianye Group has achieved significant results in this regard, forming a resource (coal, salt, limestone) - power - calcium carbide - cement, PVC - water-saving equipment And all kinds of plastic products recycling industry chain. To improve the comprehensive utilization of resources, reduce environmental pollution, and take the road of circular economy development is the future direction of development of the chlor-alkali industry.
Second, the development of the chlor-alkali industry is inseparable from safe production. The main products of the chlor-alkali industry, such as liquid chlorine and caustic soda, are hazardous chemicals, and there are major risks during production and transportation. According to statistics, among the safety accidents caused by hazardous chemical substances in China, 22% of all accidents caused by chlorine and chlorine-containing compounds accounted for the largest proportion of safety accidents. Among them, 66% were due to accidents caused by the company’s production personnel operating in violation of regulations and negligence. To effectively prevent the occurrence of safety accidents in chlor-alkali enterprises requires a full and effective combination of technology and management. Technically, through the continuous improvement of processes and equipment, the essential problems that threaten the safe production and use of chlorine are eliminated as much as possible; in management, the system is continuously improved and perfected, and the compulsory implementation of laws and regulations addresses the production, storage, transportation, and use of chlorine gas. The entire process of effective supervision issues.
The harmonious development of the chlor-alkali industry is mainly due to the harmonious development of chlorine and alkali and the harmonious development of the two main production methods: polyvinyl chloride calcium carbide and ethylene.
The imbalance between "chlorine" and "alkali" in the chlor-alkali industry has always been a problem. The shortage of chlorine and excess alkali is a manifestation of a certain level of development of chlor-alkali in a country. Alkaline chlorine is rare in the history of the chlor-alkali industry. Due to the relatively high added value of chlorine-consuming products, the main purpose of the new or expanded projects of domestic chlor-alkali enterprises in recent years was to obtain chlorine. Therefore, even if there has been a significant excess of caustic soda, many enterprises still choose to expand production. Among all the chlorine-consuming products, the chlorine consumption of PVC accounted for about 40%. However, due to the slower growth rate of PVC downstream industries, when the market for PVC is decreasing, some companies also produce caustic soda. Because of the decrease in the operating rate of PVC, the sales of caustic soda products in the market of chlor-alkali products sold in 2006 was far better than the sales of PVC products. This was a relatively weak sales of caustic soda in previous years. The situation is exactly the opposite. The balance between "chlorine" and "alkali" is not only reflected in the two products of polyvinyl chloride and caustic soda, but should be reflected in the harmonious development of all chlorine-consuming products and alkali products. At present, there are more than 3,000 types of chlorine products in China, and chlor-alkali companies only account for a small proportion, and there are relatively few products for industrialization and mature applications. Therefore, chlor-alkali enterprises should strive to make a good balance between chlor-alkali and organic chlorine products. We will vigorously develop chlorine-containing fine chemicals and special chemical products. Chlorine products that can be developed include high molecular compounds and chlorinated polymers (chlorinated rubber, polyvinylidene chloride and its copolymers, chlorinated polyethylene, chlorinated polypropylene), epoxy compounds, phosgene products , methane chloride, chlorine intermediates, etc., to develop chlorine products, which is conducive to the formation of chlor-alkali balance, but also to avoid the PVC industry's concentrated expansion, blind competition, increase the added value of chlor-alkali products.
The polyvinyl chloride calcium carbide method and the ethylene method coexist, and it is the "Chinese characteristics" of the chlor-alkali industry. Foreign countries basically eliminated the production process of calcium carbide process in the 1960s. At that time, the background of the era was that the price of crude oil was relatively low, and there was a certain cost advantage in the production cost of ethylene. China's polyvinyl chloride industry started relatively late and has been in the state of coexistence of ethylene and calcium carbide. Today, with the rise of crude oil, the calcium carbide process polyvinyl chloride has advantages in cost, and the ethylene process has advantages in environmental protection and quality. In recent years, the substantial increase in the cost of ethylene-based polyvinyl chloride has led to the expansion of chlor-alkali enterprises mainly using the calcium carbide method. In recent years, the new large-scale calcium carbide-based polyvinyl chloride companies have made great efforts in environmental protection and product quality. In the production process, the application of large-scale polymerizers, and automatic control technologies, etc., all of them are also applied to high-tech applications. Therefore, the calcium carbide-based polyvinyl chloride produced by the large-scale enterprises and the ethylene-based polyvinyl chloride are almost the same in terms of product quality. And from the perspective of development scale, the production capacity and output of the calcium carbide process have far exceeded that of the ethylene process. From the perspective of the development of the PVC industry in the future, the ethylene process is a global development trend. However, due to the special conditions in China, the calcium carbide process PVC process with cost advantages will exist for a long time, and the state will be in line with the industrial policy to form the upstream and downstream. The calcium carbide process polyvinyl chloride enterprises in the industrial chain also have supportive attitudes. In general, the ethylene law and the calcium carbide law should form a situation of dislocation competition and common prosperity.

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