Information technology helps the petrochemical industry to save energy
As we all know, the petroleum and chemical industry is a high-energy-consuming and highly-polluting industry. Its energy consumption ranks fifth among all energy-consuming industries in China. Its annual energy consumption accounts for about 15% of China's total annual consumption, and the “three wastes†emissions It is also in the forefront of various industries, and has major responsibility for energy conservation and emission reduction. The management and full use of energy is the primary task of energy and emission reduction in the petroleum and chemical industries. Recently, the “China Petroleum and Chemical Industry Integration Development Report†issued by the China Petroleum and Chemical Industry Federation shows that increasing the application of information technology in production equipment, process flow, and enterprise management can improve the efficiency of energy resource utilization. , Transform and upgrade the production level of traditional industries, and promote the transformation of economic development methods. In fact, in recent years, many chemical companies in China have actively used information technology to become a model for energy conservation and consumption reduction in the full use of electricity, water, steam, and natural gas, as well as the comprehensive management and utilization of energy.
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The energy management system enhances comprehensive energy monitoring and coordination. Energy management is a top priority in the production and management of petroleum and chemical companies. The content is also very complicated. The energy management system accurately grasps the proportion of the company's energy costs and development trends through various means such as energy planning, energy monitoring, and energy consumption analysis, so as to clarify the responsibility for energy conservation, reduce energy consumption per unit of product, and increase economic efficiency. For example, Sinopec has established an energy operation model for each company in the management system, covering various projects such as energy purchase, production, consumption, and sales, which can fully reflect the energy flow of the entire company, facilitating management personnel to identify problems in a timely manner and targeting them. Land rectification.
In terms of water resources utilization, the water resources gradient utilization system can achieve water saving and emission reduction. Repeated use of water and gradient water is an effective means to achieve water conservation and reduce wastewater discharge. Taking Xinjiang Tianye as an example, through the water resource gradient utilization system, the waste water is recycled through the polymerization mother liquid water, and the calcium carbide slag supernatant passes the closed circuit circulation, which greatly reduces the waste water discharge.
In terms of steam utilization, the steam pipe network optimization system can improve steam utilization efficiency. By optimizing the system, the operation and management level of the steam pipe network can be improved, and it will have a positive effect on safe production, energy conservation and consumption reduction. Steam pipe network strict online simulation and intelligent monitoring technology consists of data acquisition system, pipe network simulation system, real-time monitoring system and real-time database, can carry out on-line monitoring, off-line analysis and optimization of pipe network, and increase the operation of steam pipe network. Safety and reliability. It is understood that the “steam pipe network operation management and intelligent optimization system†organized and developed by Liaoyang Petrochemical Company can save 185,100 tons of steam and increase the economic benefit of 21.48 million yuan throughout the year.
The implementation of cogeneration system is also an effective means to increase the efficiency of energy utilization and reduce production costs. The 4 x 135MW cogeneration unit implemented by Xinjiang Tianye Company used calcium carbide slag as a desulfurizer to establish the domestic first-generation flue gas desulfurization demonstration unit for calcium carbide slag of large-scale thermal power units in China. Luxi Chemical Co., Ltd. began to implement a comprehensive utilization of resources for cogeneration projects in 2007, replacing three of the original six with three sets of 0.75-million UG-75/5.3-M19 circulating fluidized bed boilers supporting an extraction steam turbine generator set. The old-fashioned small-chain boiler, utilizing the gas slag produced by the company's synthetic ammonia plant and the fly ash blended bituminous coal as the boiler fuel for comprehensive utilization, not only solves the problem of waste residue accumulation and production steam, but also reduces the production cost, and can save 46,000 tons annually. Standard coal.
In addition, in addition to direct comprehensive management of various types of energy sources, the use of information technology to optimize production equipment and improve the performance of equipment systems is also one of the ways for petrochemical companies to save energy and reduce consumption.
On the one hand, frequency conversion speed control technology has become more and more widely used in a variety of petrochemical equipment and process equipment supporting power dragging equipment because of its advantages of energy saving, safety, and easy control. Tangshan Sanyou Group and its subsidiaries have conducted frequency conversion and energy-saving transformation of large-scale operating equipment for various production systems to achieve energy conservation and consumption reduction, accumulating an annual profit of 11.183 million yuan. Among them, the total number of frequency converters of the subsidiary companies is 99, the total motor capacity is 4755.5 kilowatts, and the total electricity cost is saved by about 9 million yuan each year. The chlor-alkali company installs inverters for the load of fans, achieving an annual profit of 958,000 yuan.
On the other hand, the application of advanced control APC technology is an effective way to use information technology to tap the potential of production equipment, ensure safe production, and improve and upgrade economic and technical indicators. It is applied to the 1800t/y sulphur yellow recovery unit in the sulfur plant of the Daqing Petrochemical Company's sulfur refinery. It can reduce the emission of sulfur dioxide into the atmosphere by about 330 tons, increase production of sulfur by nearly 165 tons, save steam by about 4,000 tons, and greatly reduce equipment failure rate. Extend the life of critical equipment.