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This post was last edited by sdwfsgyykai on 2020-9-5 at 08:05. Xiabaofeng Energy recognized as a benchmark enterprise for energy efficiency in coal-based olefin production. Author/Source: Modern Coal Chemical Industry; Date: 2020-09-04; Clicks: 9. On September 4, 2020, the China Petroleum and Chemical Industry Federation announced the list of benchmark enterprises for energy efficiency in key energy-consuming products within the petroleum and chemical industry for the year 2019, during the “2019 Annual Petroleum and Chemical Industry Energy Efficiency ‘Leader’ Announcement and Energy-Saving Technology Exchange and Promotion Conference.” Ningxia Baofeng Energy Group Co., Ltd. was selected as a benchmark enterprise for energy efficiency in coal-based olefin production. Ningxia Baofeng Energy Group Co., Ltd. is located in the core area of the **-level Ningdong Energy and Chemical Industry Base. With a planned total investment of 72.7 billion yuan, it has built a \"Baofeng Energy Circular Economy Industrial Base\" covering an area of 14,000 mu. Since 2005, the company has adhered to the green and sustainable development concept of \"resource conservation and environmental friendliness.\" By relying on technological innovation, it has pursued a path of development characterized by high-end standards, intensification, cleanliness, and scale. Using coal as raw material, it has built an integrated high-end coal-based new materials circular economy industrial cluster. This cluster includes facilities capable of producing 8.1 million tons of coal, 7 million tons of coke, 14.6 million tons of washed coal, 6.4 million tons of methanol, 2.4 million tons of olefins, 1.2 million tons of polyethylene, 1.2 million tons of polypropylene, 400,000 tons of tar products, 100,000 tons of needle coke, 120,000 tons of benzene hydrogenation products, and 200,000 tons of butane. In addition, it produces various fine chemical products such as 1-butene, modified asphalt, phenol, naphthalene, washed oil, anthracene oil, pure benzene, xylene, MTBE, and liquefied gas. The company’s annual sales revenue can reach 40 billion yuan, with annual tax payments exceeding 6 billion yuan; it employs nearly 20,000 people. The circular economy industrial chain enables the complete utilization of coal and its clean and efficient use; nearly a hundred high-end chemical products are produced using coal as a substitute for oil, with comprehensive indicators such as energy consumption and environmental protection reaching leading levels in the country. The company ranks among the leaders in the industry in terms of scale of operations, technological capabilities, and operational efficiency; it has become a leading enterprise in the production of high-end coal-based new materials and chemicals in China. It was listed on the Shanghai Stock Exchange’s A-share market in May 2019. Baofeng Energy utilizes internationally and domestically leading technologies, processes, and equipment to develop a high-end coal-based new materials circular economy industrial cluster that integrates coal, coke, gas, methanol, olefins, polyethylene, polypropylene, and fine chemicals. A circular economy industrial park is centered on the efficient use and recycling of resources; it represents an economic growth model that aligns with the principles of sustainable development, and it constitutes a fundamental shift away from the traditional growth model of \"mass production, mass consumption, and mass disposal\". In circular industrial parks, the power stations and wastewater treatment plants are shared by all facilities, enabling the centralized use of utility services ； Waste gases and residues from various units are reused for each other, enabling comprehensive energy utilization; for example, the vent gases from methanol units and the fuel gases from olefin units are sent to coking furnaces for combustion. According to statistics, in 2019, 59.47 million cubic meters of flare gas and 48.42 million cubic meters of fuel gas were reused, equivalent to 67,700 tons of standard coal ； The ammonia vaporization wastewater from chemical production processes has high levels of oil and ammonia nitrogen, making direct treatment costly and inefficient. The fine residues resulting from gasification possess a porous structure with a large specific surface area; by mixing this gasification black water with the ammonia vaporization wastewater, the oil and ammonia nitrogen concentrations are significantly reduced due to adsorption by these residues. This reduces the costs associated with wastewater treatment and improves its efficiency. By tapping into energy-saving potential and taking various measures to improve energy efficiency, Baofeng Energy uses its energy management system as a framework to fully identify the factors that affect major energy consumption, thereby unlocking greater opportunities for energy savings. Following the approach of \"improving some systems while reserving others,\" energy management plans are formulated from three aspects: energy management in operations, technical upgrades, and research on new technologies, to ensure coordinated implementation of energy-saving measures. Among them, energy management focuses on equipment operation management, process optimization, improvement of operational skills, and optimization of energy use in various areas ； Technical upgrades focus on the utilization of waste heat and energy, the phasing out of outdated mechanical and electrical equipment, and the adoption of new technologies and equipment ； Technical efforts focus on the utilization of low-grade thermal energy and production bottleneck issues. Improving the utilization rate of coal fed into the methanol production plant is a key focus of energy-saving efforts. By carrying out research on the technology of \"reducing residual carbon in fine slag\", it is possible to adjust the calorific value of the feed coal while ensuring the gas production per ton of coal. This approach reduces the total amount of carbon that enters the reaction chamber of the gasifier per unit time, which is beneficial for increasing the overall carbon conversion rate and improving the utilization efficiency of the feed coal. The calorific value of the feed coal was optimized from 5400 kcal/kg to 4800 kcal/kg. While maintaining a stable gas production per ton of coal, the carbon content in the fine slag was effectively controlled and reduced to 27.38%, a decrease of 5.31% compared to the previous level. The utilization efficiency of the feed coal improved significantly, with the amount of feed coal required for producing methanol dropping to 1.19 tons of standard coal per ton of pure methanol. Through modifications that involve the recycling of nitrogen gas used during startup, the olefin plant is able to save 2,577 tons of standard coal equivalent in nitrogen usage per startup. Additionally, this project won the first prize in the 2019 Yinchuan Third Workers’ \"Top Ten Innovative Ideas\" competition ； Through the technical renovation project of installing salt spraying dust removal tanks on MTO vertical exchangers, 15,200 tons of steam are saved annually, generating benefits of 1.1372 million yuan ； By optimizing the temperature of the extruder barrel, 2.88 million kWh of electricity can be saved annually, resulting in savings of 1.5552 million yuan. Through the implementation of various measures, the energy consumption of the olefin plant was reduced to 503.82 kg of standard coal per ton of diolefins. 03 Apply energy-saving technologies to reduce energy consumption through multiple methods. While carrying out energy-saving efforts, Baofeng Energy pays close attention to the development of new energy-saving technologies. Every year, new energy-saving technologies are acquired through various channels such as participating in industry technical exchanges and sending staff for training*, and these technologies are then promoted throughout the company; they are applied after thorough evaluation. The application models include not only purchasing but also the contract energy management approach, which reduces the risks associated with the use of new technologies, alleviates financial pressure, and enables access to long-term, high-quality services. In the coal-to-methanol plant, the hydraulic coupler of the gasification circulation fan was removed and replaced with a bearing connection; a high-voltage frequency converter was added to the circulation fan motor to enable frequency control, allowing the load on the circulation fan to be adjusted by changing the motor frequency. After the implementation of this project, each wind turbine can save 970,500 kWh of electricity per year, resulting in benefits of 428,800 yuan ； The accompanying sewage treatment plant replaced the centrifugal fans with magnetic suspension fans, resulting in energy savings of 2.688 million kWh per year and economic benefits of 1.4515 million yuan.