2 = SimHei technological innovation and high-tech industrial heating furnace cold feed uses cold feed to recover flue gas heat, the furnace convection section is short, the furnace structure is simple, no additional equipment and media are needed, and the operation and management is simple, which is the recovery of flue gas waste heat Good way.
The preheated air and the preheated air temperature are suitable for a variety of process media, but the air heat transfer coefficient is small, requiring a high temperature of the heat flow medium and a moderate flow viscosity; at the same time, it should not be too light to prevent spontaneous combustion of oil during leakage. Normal oil meets these requirements and also meets the process conditions.
The oil and gas at the top of the top cycle is not used for preheating crude oil, and the method of top cycle reflux is used to recover the remaining heat temperature at the top of the tower. 60% of the recoverable heat at the top of the tower is recovered, and the investment is low and the benefit is high.
Make full use of the heat of the residual oil. The oil flow rate is large and the temperature is high. After multiple split heat exchanges, the final heat exchange temperature of the cold flow is fully improved.
The final designed heat transfer area is 13465,2, the enhanced heat transfer area accounts for 31.2, the heat recovery is 139422, the recovery rate is 79.8, and the heat intensity is 10.35kWm2. The various heat exchange technical indicators are at an advanced level. Before the crude oil enters the heating furnace, the heat exchange reaches 294, reaching the advanced level of similar domestic devices.
The energy consumption of the device is 12.3 standard oil. Compared with the distillation of the same imported crude oil, the standard oil is reduced by more than 1 standard oil.
The device was successfully steamed twice, and a good level was achieved. The device operates smoothly and has a strong adaptability. The production data shows that the energy recovery system of the device has reached the expected goal and the design of the heat exchange network is satisfactory. However, the temperature of crude desalination and the temperature of softened water entering the furnace before the desalination were sometimes lower, and a lesson was proposed for the rectification of the heat exchange network.
Senior Director, Deputy Director of the Technical Department of the Institute of Accounting. The main design projects include the refining and transformation of lubricating clay and the furfural refining and transformation of lubricating oil, the distillation device of olefin synthesis pour point depressant device, etc. Address: No. 1, Hongqi North Road, Maoming City, Guangdong Province, non-008 aqueous cleaning technology for telephone vacuum electronic components Liu Wanli, Li Wei, Yuan Yuefen, Li Yuxiang, Liu Jianqiang, Hu Chengxiang Electronic Industry is the largest user of 008 solvent, during the processing of pin 001 The dirt composition is complex, and there are blind holes in the workpiece, which are relatively difficult to clean. Originally, all were cleaned by Han, and redundant people have been listed as controlled substances in the 1990 Montreal Protocol Amendment. After inquiry, it is known that there is no foreign agent cleaning technology that can meet the requirements of this workpiece abroad.
The aqueous cleaning system composed of aqueous cleaning agent dirt and metal components is a complex multi-phase system, the dispersion medium is a solution containing multiple components, and the system involves multiple interfaces and surfaces. Complexity, its cleaning function becomes a very complicated process. Aqueous detergents are water-based solutions formulated with surfactants as the main active components and formulated with builders or other additives. Nonionic surfactants are the most used surfactants in cleaning at present. They are composed of hydroxyl, thorium and ether bonds, and they are used as hydrophilic surfactants.
In order to select a suitable surfactant, we first make a 15-value determination of the oil stain to be cleaned. In order to obtain a very clean level of workpiece surface, we screened the main components of the compound aqueous detergent including fatty alcohol, polyvinyl ether, alkyl alcohol amide, and other surfactants and additives, which are non-toxic to humans and environmentally friendly. No depletion of the ozone layer and low or no impact on global warming. It does not contain comprehensive requirements such as phosphate and nonylphenol ethyl salt. Through the experiment, it is preferred to determine the process parameters as temperature 60, concentration 33.5, time 15. For the evaluation of the cleanliness of the workpiece after cleaning, the water film rupture method is generally used at the production site. We also use 0 to analyze the process performance, and regard carbon as a sign of residual oily dirt on the surface. The test results show that the cleaning ability and rinsing performance of the 8-aqueous agent cleaning process are equal to or better than the original sink cleaning process.
Chief Engineer and Grade Engineer of Component Factory of Gem Electronics Group Co., Ltd.
Mainly engaged in materials science and process technology, vacuum thin film process research. Note this lesson by phone. 1 Projects funded by the United Nations Judging Development Agency 0, 96, 62. This article was published in the Journal of Vacuum Science and Technology. A preliminary study on the standard of wooden series handicrafts Meng Gang Guo Chunying entered the 1980s. There is a forest resource crisis and economic crisis in the district. In the process of actively exploring ways to alleviate crisis and alleviate difficulties throughout the city, various places introduced wooden crafts production technology in a timely manner, and on the basis of the original, the wooden spelling, wooden stickers, wooden carvings, etc. have been rapidly developed and become the city ’s economic development. Alternative industries. At present, there are more than 400 wooden handicraft production enterprises in the city, with fixed assets of 320 million yuan. In 1998, the output value reached 279 million yuan. The products are sold to all parts of the country and Japan, the United States, South Korea, Russia, Hong Kong, Macao and other countries and regions. It has an important place in the composition of the national economy, and it has become a new hotspot for stimulating economic growth and placing employees in our city, and has gradually developed into a leading industry.
With the continuous progress of society, this is a rare development opportunity for wooden crafts production enterprises. The wooden handicrafts in our city are in the decentralized industry. Except for the leading enterprises such as Qiaoyi Guangmingsenhao and other leading enterprises that have formed a fixed scale and guaranteed product quality, most of the enterprises are producing without standards and the products are not available. Quality assurance. This has a lot to do with the absence of standards for wooden series crafts from the country to the provinces and cities for many years. The production enterprises have no standards to follow, and even some are crudely manufactured, reduced grades, lack of work and less order, etc., in order to promote the quality and consumption reduction of wooden handicraft enterprises, improve product quality, raise the quality of wooden handicrafts to a higher level, enhance products and enterprises Competitiveness in the market increases the economic benefits of the enterprise; at the same time, it strengthens the management of the wooden handicraft market, regulates the economic order of wooden handicrafts, protects the legitimate rights and interests of national enterprises and consumers; establishes unified standards to fill gaps in domestic standards It is of great and far-reaching significance for the market competition mechanism and the state to eliminate non-standard production enterprises, and to promote the industrialization of wooden crafts in our city as soon as possible.
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