The hottest automation technology accelerates the

2022-08-03
  • Detail

Automation technology accelerates the change of "times"

"five years is basically a development stage since the birth of DCS, and the update speed of technologies derived from the development of DCS in recent years is even more amazing." Lin Rong, deputy chief engineer of Sinopec engineering construction company, described the development of automation technology in China's petroleum and petrochemical industry in an interview. From the panel mounted instruments in the 1950s and 1960s to the intelligent instruments that can be simply programmed in the 1970s, and then to the gradual development of DCS in the 1980s, the "era" change of automation technology in the petroleum and petrochemical industry in domestic enterprises is also accelerating with the improvement of the overall demand of the industry

the prospect of fieldbus technology is promising

when many domestic petroleum and petrochemical enterprises are still taking a wait-and-see attitude towards fieldbus technology, the SECCO ethylene project of Sinopec and BP, the Nanhai Shell project of CNOOC and shell, and the Fujian Refining ethylene project that will start soon have adopted fieldbus technology. Is the era of 4 ~ 20mA instruments and equipment coming to an end? "DCS is PCs (process control system) But it is not omnipotent. For example, in case of sudden overtemperature and overpressure, the regulating valve loses its function, and the regulating circuit can no longer control the whole system, which depends on the safety instrument system. Then the application of fieldbus technology is also a reason. Compared with a pair of air quality ammonia determination ion selective electrode method gb/t 14669 ⑼ 3 point-to-point data transmission mode, the current transmission of temperature, pressure and other data has been inadequate in practical application. Fieldbus just solves this problem. But the real problem is that fieldbus technology has not been widely used in China. " President Lin said to the introduction

the application of Fieldbus not only means the reduction of cables, cable trays, junction boxes, cards and other hardware facilities, but also means the reduction of investment and the reduction of hardware failure rate. What are the domestic enterprises that take a wait-and-see attitude towards fieldbus worried about? "The Tianjin and Zhenhai projects under construction in China are all large projects with an investment of more than 20billion yuan and do not use fieldbus technology. From this point of view, the crux of the problem is not a shortage of funds. Compared with the fact that most of the Sino foreign joint venture projects under construction in China use fieldbus technology, this is related to the mode of operation of domestic enterprises." President Lin explained. It is understood that foreign enterprises attach great importance to the problem of staffing. They pay more attention to reducing engineering quantities and maintenance costs, and also to reducing manpower. However, from the perspective of manpower, the advantages of applying Fieldbus Technology in China are not very obvious. President Lin said: "In large refineries such as Zhenhai Refining & Chemical Co., Ltd. and Yangzi Petrochemical Co., Ltd., there are about twoorthree instrument maintenance personnel. However, in Foreign Refineries of the same scale, there are only a few dozen such technicians. All they do is determine the scheme and technology, and all the specific work is outsourced to the equipment manufacturer. However, domestic enterprises are also discussing relevant issues. The South China Sea Shell ethylene project has signed a framework agreement and a long-term agreement with the supplier Maintenance contract for the period. "

the successful application of Fieldbus Technology in domestic and foreign joint venture projects has also brought a lot of enlightenment to domestic enterprises. Lin Zong believes that the greatest advantage of fieldbus is that it is fully digital, and the maintenance can be completed on the computer without going to the field for calibration; Factory diagnosis can perform pre diagnosis, not only measurement and control data, but also diagnostic data can be displayed. The data in the intelligent fieldbus positioner can be transmitted to DCS, so that DCs can judge and generate maintenance report. From this point of view, fieldbus technology not only saves a lot of labor and material costs, but also improves the maintenance level. According to the Research Report of arc, the application of Fieldbus can save 20% of the maintenance cost of the whole factory instrument and automatic control system

considering comprehensively, the application experience of fieldbus technology has become mature. Talking about the future development of fieldbus technology, President Lin said optimistically: "by 2015, fieldbus technology will play a leading role in China's petroleum and petrochemical industry."

there is a huge space for the development of domestic safety control products.

the development of safety technology is the basis for the stable production of the petroleum and petrochemical industry. The ESD system based on PLC once "escorted" many petroleum and petrochemical projects. "ESD refers to the safety controller itself, that is, the PLC that completes the emergency shutdown should be powered on and operated once a month. In recent years, the ESD system has been greatly expanded in concept. Sis is derived from the original ESD system. It includes the input source sensor, output terminal components and SIS controller (also known as' arithmetic unit ') for shutdown." Mr. Lin introduced to you

at present, there are a few safety certification bodies in the world that have released many latest test results for thermoplastic composites tri Mack, and the German t ü V safety certification is more recognized in China. The so-called security certification is to test the entire security system and carry out SIL level certification. President Lin explained: "in the petroleum and petrochemical industry, SIS system is generally applied to sil3 at the highest level. Compared with the safety instrument system used in the past, the design standard of the current safety system has been improved. The products can only be sold in the industrial field after they are tested and certified by the safety organization and the safety level is confirmed, which actually standardizes the market access of automation products." Whether a product can have good market sales depends not only on its price, but also on a standardized market access policy. This may be the reason why domestic automation products have been suppressed by foreign brands in the petroleum and petrochemical field for a long time. Mr. Lin believes that a large number of automation products of foreign brands will be used in domestic large-scale projects, and only a few domestic products will be used in some small petrochemical projects. Since China does not have a complete and internationally recognized safety certification standard, it is impossible to talk about the export of domestic automatic safety system products

is the quality really the problem of domestic safety control products? President Lin said: "I think the domestic industrial automation instrument industry still has a long way to go. For example, why did the United States and Europe choose the home appliances exported from China? It is because the price is cheap and the quality is reliable. In fact, the products of Wuzhong instrument, Zheda zhongkong and other companies have been greatly improved in recent years. For example, the products of Zheda zhongkong have a large market share in China, but they are only geared to one market." The performance and quality of some small and medium-sized chemical enterprises are weaker than that of some foreign products applied in large-scale projects. " Compared with the monopoly of Honeywell, Emerson, Yokogawa, Siemens and other large international companies, the application of domestic automation products in several domestic oil giant enterprises is just beginning

the revitalization plan promotes the application of new technologies

for the revitalization plan of the petroleum and petrochemical industry in which the products promoted by the State Council recently are produced according to national standards, President Lin believes that there can be two improvements from the perspective of engineering. One is to achieve the effect of energy saving and consumption reduction by optimizing the layout; Second, the optimization technology of process flow is used to make the upstream and downstream process units reasonably configured and achieve a balance between material distribution and recycling

in terms of new automation technologies, President Lin believes that the development of wireless network technology has gradually entered the application stage, and it is very outstanding in energy saving, consumption reduction and installation material saving. "As an extension of fieldbus technology, it has been rising rapidly since 2005. Most foreign Petroleum and petrochemical enterprises have begun to use wireless network technology. In China, SECCO projects have also adopted wireless temperature transmitters from Emerson and other companies in occasions where transmission rate requirements are not too high." Mr. Lin introduced to you. Due to wireless transmission, the investment in most installation materials can be saved, and the energy consumption can be greatly reduced. Because the wireless network signal transmission mainly depends on the battery, the performance of the battery directly affects the transmission rate. President Lin believes that with the improvement of wireless product technology and battery performance, the application range of wireless products will be further expanded. Now, the data transmission speed of some foreign wireless products is close to that of fieldbus technology

when it comes to the development of wireless technology, President Lin is very optimistic about its development prospects. He said: "it will take up to ten years for wireless technology to be widely used in the petroleum and petrochemical industry, because once the technology is mature, its advantages are quite obvious. In a word, the popularization of wireless technology will push the automation technology of the entire petroleum and petrochemical industry into a new era." (Zhaoxu) - interview with LINRONG, deputy chief engineer of Sinopec engineering construction company

Copyright © 2011 JIN SHI