Mix And Smelt The Russian Crude Oil And Fit Equipment Corroding And Safeguard Procedures In Often Reducing Pressure

Daqing petro-chemical corporation oil plant reduce pressure the device be designed by the designing institute of Beijing often, built and put into production in October of 1963, designed capacity was 1 million tons per year, pass bigger technological transformation four times, the working ability of crude oil is 2,500,000 tons at present every year. The working ability of crude oil is 2,500,000 tons at present per year.. Raw materials are the crude oil in Daqing. Because the crude oil in Daqing is the crude oil of paraffin base, low in sulphur content ( including sulphur 0.12%), the oil is fine, with domestic to reduce pressure device compare , corrode light, so equipment material is it pay on the low side to select for use when design often while being other. As the economic trade in the world is strengthened in recent years, the petrochemical industry trade, in order to lower costs further, pursue profits to maximize, introduce the foreign crude oil and mix smelting one after another. The petro-chemical corporation of Daqing is under this kind of background , mixed and smelted Russian crude oil experiment.Before mix and smelt, we smelted Kazakhstan, Ji Hua and forest source oil plant often reduce pressure the device is investigated, found finally, after mixing and smelting the Russian crude oil according to certain proportion, within 2-5 months of production, equipment take place more serious corrosion phenomenon, these is it happen in for the first time , carry the condensation system often mainly to corrode, one section of boiler tubes of convection of heating furnace , transfering to the oil line , high-temperature pipeline and transporting on the high-temperature wax oil and machine pump of the residual oil. These have corroded and threatened the safety in production of the device seriously.Can be divided into three kinds briefly to the corrosion that often reduces pressure: One kind is low-temperature H2S-HCL -H2O corrode, take place in top of the tower condensation system mainly, namely top of the tower volatilize line , oil gas volatilize line, empty cold device , water- cooling device and backset current pot ,etc. position; Second corrode , is it happen in 240 above wax oil , residual oil ,etc. high-temperature pipeline and transport high-temperature medium machine at the pump mainly to take place mainly high-temperature sulphur; The third kind is corroded, take place in the position , such as one section of stoves of convection of heating furnace, oven board and flue ,etc. mainly by dew point of exhaust gas . In study Daqing crude oil mix at smelting Russian crude oil with a heavy sulfur content issuing of corroding, adopt data analysis mainly , to corrode result composition analysis and equipment disintegrate method of measuring etc., on the basis of using others' experience for reference , study corrosion mechanism , find out the suitable antiseptic measure of devices .