China's petrochemical companies still have great potential for the use of spent steam and moderate and low temperature waste heat

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“Energy-saving diagnosis is a zero-distance, face-to-face technology promotion model for energy-using companies to treat patients with the disease. Its purpose is to promote those energy-saving technologies that have been tested and proved to be effective, and to tap the energy-saving potential of key energy-consuming companies. On April 12, Fang Xiaokai, deputy director of the China Chemical Industry Energy Technology Association, spoke of the energy-saving diagnosis. At the end of March, after the industry experts of the Chemical Energy Conservation Association organized the systemic free energy-saving diagnosis of Sinopec Yizheng Chemical Fibre Co., Ltd. and Sinopec Yangzi Chemical Co., Ltd., the association has opened a “prescription” for 30 chemical companies. Advanced technology has its place.

Fang Xiaoji told reporters that the "12th Five-Year Plan" industrial energy-saving situation is severe and difficult, and the energy conservation in the chemical industry has also entered a critical stage. The reduction in energy consumption in the entire industry has to rely on the promotion and application of advanced energy-saving technologies, so that the technology can truly enter the grassroots level and penetrate into the enterprise. And landed roots.

Since the "Eleventh Five-Year Plan" period, the National Development and Reform Commission has released three batches of energy-saving technologies. The Chemical Energy Conservation Association also launched two hundred energy-saving technologies in the petroleum and chemical industries in 2009 and 2011 respectively. "But the general lack of energy management personnel, lack of professional knowledge, information channels are not open and other factors, the penetration rate of these technologies is still very low, the application of technology is still in its infancy." Fang Xiaoyu said.

In order to solve the problem of advanced technology and practical application of “two skins”, the Chemical Energy Conservation Association has been engaged in energy conservation diagnosis since last year, organizing industry experts, companies that jointly possess excellent energy-saving technologies, and energy-saving service companies that use contract energy management. Intensively conduct energy-saving diagnostics for enterprises and recommend the best energy-saving technologies, projects and products to companies.

“Conference promotion is a form. Publishing books and publications is a form. The state publishes a technical catalogue is also a form. However, how to get technology to land and let companies understand that the intermediate process is very important. Some technology companies do not know enough about it. In fact, this kind of technology has been applied to better applications.For example, the micro-oil ignition technology has been published in the Catalogue of the National Development and Reform Commission, but our company is still not quite aware.The energy-saving diagnosis process is to go deep into the field and let Senior managers, department heads, and energy-saving technicians all participate in the research. Everyone will soon define an energy-saving technology. Its level, effects, economic benefits, and energy-saving benefits are also more intuitive. It is also easier to make decisions when making decisions. "Fang Xiaoyun believes that energy-saving diagnosis is an extremely important intermediate process that connects advanced technology and enterprise connection.

Zhang Qitong, a senior advisor of the Chemical Energy Conservation Association, occasionally presented a report on the energy saving diagnosis made to the actual situation of the company. It was in the form of a doctor’s diagnosis for the patient and diagnosed both the “disease” and the “disease”. The process has diagnostic conclusions. The energy-saving diagnosis made by Henan Jinkai Group Rucheng Jinxin Chemical Co., Ltd. showed that the company's synthetic ammonia process system is not suitable for the use of thermal deaerators, and Yu Shen brand redox resin is used for deoxygenation at room temperature, which can save 5,885 tons of standard coal. The energy-saving benefit reached 6,473,500 yuan. In the recent energy-saving diagnosis made by Yizheng Chemical Fiber and Yangzi Chemicals, through investigation and diagnosis, the experts pointed out the technical renovation of the circulating water system, boiler micro-oil ignition, water supply and oxygen removal, energy saving, desulphurization, and denitrification. It is suggested that according to the technical reform proposals and plans, both companies can save over 100,000 tons of standard coal annually.

Xiaofang Fang told reporters that the energy-saving diagnosis of the company's on-site inspection, there are measured results, the implementation of the project will be able to achieve the actual energy-saving effect. He explained that in the Sinopec Beijing Yanshan Petrochemical Company's energy-saving diagnosis of circulating water cooling towers and the energy-saving diagnosis of ethylene crackers, the expert group gave the diagnosis conclusion: The company has two cooling towers with a flow rate of 3000 cubic meters per hour. It is possible to replace the original two 160-kilowatt motors with mixed-flow double volute high-efficiency turbine driving fans, which can save 2 million kilowatt-hours per year. With blackbody-enhanced radiant heat transfer technology, the energy-saving rate is more than 4%, which has a good energy saving. And economic effect.

Zhang Qitong also told reporters that in the energy conservation diagnosis process, they found that companies are doing a good job in the utilization of high temperature waste heat, but there are still great potentials for the use of some steam and medium and low temperature waste heat.

“From the perspective of the 30 companies that have passed through, the scope of coverage includes a wide range of key energy-consuming enterprises such as petrochemicals, ethylene, chlor-alkali, soda ash, fertilizers, synthetic ammonia, and calcium carbide. The technical promotion focuses on thermal systems and electricity. The system, water circulation system and product process system have achieved remarkable results and are welcomed by enterprises and have produced very good demonstration effects.” Fang Xiaolu said that the next step will be to continue to promote energy saving diagnostics. At present, they are studying how to make energy-saving. Diagnosed normalization, mechanism, and innovation of energy-saving technology promotion models, such as the promotion model of integrated energy-saving technologies for industrial furnaces and heat exchangers, and application of heat-integrated energy system integration optimization and demonstration models, to fully promote the application of energy-saving technologies for petrochemical enterprises.

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