CN1644651A - Production of heavy asphalt by refining thick oil of xinjiang mixed with oli oil - Google Patents

Abstract

This invention relates to a method for production of asphalt from Aoli cut oil 35m3/h, Xinjiang thick oil 7m3/h and light dirt oil 2.5m3/h. The procedure is regulated correspondently and the product is suitable for heavy highway.

Description

Oli oil is mixed the processing method of refining xinjiang viscous crude oil Development and Production heavy duty road asphalt

Technical field

The present invention relates to the production method of petroleum refining technology field heavy duty road asphalt, particularly oli oil and mix the processing method of refining xinjiang viscous crude oil Development and Production heavy duty road asphalt.

Background technology

Produce heavy traffic paving asphalt and mainly adopt four kinds of methods: steam slide method, solvent deasphalting method, oxidation style and blending method etc., no matter adopt which kind of production technique to produce heavy duty road asphalt, all must screen suitable crude oil, the crude oil of China more than 80% is not suitable for producing pitch, limited by crude resources, seeking and explore the novel method of producing heavy duty road asphalt as oil refining enterprise becomes inevitable requirement.

Emulsified orinoco crude oil is the oil-in-water emulsion from a kind of cycloalkyl extra-heavy oil of Venezuela's import, moisture 29.7% (main character sees Table 1); Be called oli oil behind the breaking emulsion and dewatering, its density is big, and kinematic viscosity is big, the asphalt content height, and wax content is low, and sulphur content height (main character sees Table 2) is to produce the bituminous high quality raw material.The system in Tahe Oilfield low viscous crude density of coagulating in Xinjiang is big, and viscosity is big, and wax content is low, and sulphur content height (main character sees Table 2) is to produce the bituminous high quality raw material.The system in Tahe Oilfield low viscous crude density of coagulating in Xinjiang is big, and viscosity is big, and wax content is low, and contain a large amount of colloids and bituminous matter and belong to sulfur-bearing intermediate base crude oil (main character sees Table 2), but can only be directly from No. 100 road bitumens of atmospheric and vacuum distillation unit production or heavy traffic asphaltum base oil.

The main character of table 1 emulsified orinoco crude oil

Density (20 ℃)/kg.m -3		????992.4
			Kinematic viscosity/mm 2.s -1	????80℃	????981.5
????100℃	????283.6
		Asphalt content, %		????5.4
Sulphur content, %					????2.12
		Nitrogen content/ug.g -1		????3008
Condensation point/℃					????4
		Flash-point/℃		????92
Water-content, %					????29.70

The main character of table 2 oli oil and xinjiang viscous crude oil

Project	Xinjiang viscous crude oil	Oli oil
			Density (20 ℃)/kg.m -3	????951.70	????1011.10
Kinematic viscosity/mm 2，s -180℃/100℃	????1810.2(50℃)/46.81	????1718.04/446.07
			Acid number/mgkoH.g -1	????0.07	????1.35
Carbon residue, %	????15.20	????7.0
			Condensation point/℃	????-6	????24
Sulphur content, %	????2.02	????2.85
			Nitrogen content, %	????3500	????5124
Wax content, %	????2.03	????0.40
			Compositional analysis, %
Stable hydrocarbon/aromatic hydrocarbons		????19.7/36.9
			Colloid/bituminous matter	????29.65/13.80	????35.40/9.9

In the laboratory oli oil and xinjiang viscous crude oil are carried out true boiling point distillation, its each cut yield sees Table 3

Each cut yield of table 3 oli oil and xinjiang viscous crude oil

Oli oil		Xinjiang viscous crude oil
				Boiling spread/℃	Yield %	Boiling spread/℃	Yield %
????HK～180	????0.92	????HK～180	????5.95
				????180～260	????4.36	????180～275	????8.84
????260～310	????1.74	????275～325	????5.91
				????310～370	????5.80	????325～375	????4.81
????370～390	????0.87	????375～425	????7.47
				????390～400	????1.76	????425～520	????11.60
????＞400	????83.99	????＞520	????54.80

But how utilizing oli oil and xinjiang viscous crude oil to produce satisfactory heavy duty road asphalt is one of direction of at present a lot of units research.

Summary of the invention

Purpose of the present invention overcomes above-mentioned technological deficiency exactly, and provides a kind of oli oil and xinjiang viscous crude oil to mix the processing method that satisfactory heavy duty road asphalt is produced in refining.

Technical scheme of the present invention is, on the basis to the existing apparatus scrap build, with emulsified orinoco crude oil 35m ³/ h mixes refining xinjiang viscous crude oil 7m ³/ h, light sump oil 2.5m ³/ h charging is produced qualified AH-90 heavy traffic passway pitch by adjusting process flow process and optimizing operation parameters, and it comprises:

1), the light sump oil that adds 4-5% in mixing crude oil adds the special-purpose emulsion splitter solution of 800-1000ppm concentration 2.5%HP-2301 type simultaneously, under 114 ℃ of electric desalting temperature, carry out, electrical desalter interface 50%,

2), set up special-purpose emulsion splitter inlet: former injection phase is in the former oil-in of electrical desalter, transform inlet as and moves forward to crude oil and go into the device place;

3), adopt atmospheric tower only to open a normal line, vacuum distillation tower is only opened vacuum 1st side cut, second line of distillation;

4), vacuum column operation conditions: subtract serious reciprocal of duty cycle through optimizing, be controlled at 90kPa,, stop the one-level evacuation, only open two, three grades of evacuation, set up two, three grades of voltage-controlled adjustings of steam according to this index;

5), 118 ℃ of fore-running tower top temperatures, 350 ℃ of atmospheric pressure kiln temperature outs, 136 ℃ of Atmospheric Tower temperature, 345 ℃ of vacuum furnace temperature outs subtract 55 ℃ of top temperature, subtract serious reciprocal of duty cycle 90kPa.

The invention has the beneficial effects as follows: after atmospheric and vacuum distillation unit simple technological transformation of process and the optimizing operation parameters, the mixing vacuum residuum of producing of emulsified orinoco crude oil and xinjiang viscous crude oil, after testing, the result meets the technical requirements of " heavy traffic paving asphalt technical requirements " AH-90 bituminous fully, has widened the oil variety of processing.See Table 4.

Table 4 vacuum residuum and AH-90 quality index compare:

Project	Vacuum residuum	The AH-90 quality index
			Penetration degree (25 ℃, 100g, 5s)/(1/10) mm	????80.5	????80-100
Ductility (15 ℃)/cm	????＞150	????＞100
			Softening temperature (ring and ball method)/℃	????44	????42-52
Solubleness (trieline), %	????99.81	????＞99.0
			Flash-point (coc)/℃	????262	????230
Density (15 ℃)/g.cm -3	????1.0258	Actual observation record
			Wax content (distillation method), %	????2.3	????＜3.0
Thin Film Oven Test TFOT (163 ℃, 5h)
			Mass loss, %	????0.60	????＜1.0
Penetration ratio, %	????62.40	????＞50
			Ductility (15 ℃) ,/cm	????＞150	????＞75

Embodiment

On the basis to the existing apparatus scrap build, with emulsified orinoco crude oil 35m ³/ h mixes refining xinjiang viscous crude oil 7m ³/ h, light sump oil 2.5m ³/ h charging is produced qualified AH-90 heavy duty road asphalt by adjusting process flow process and optimizing operation parameters, and it may further comprise the steps:

1), the light sump oil that adds 4-5% in mixing crude oil adds 800ppm-1000ppm concentration 2.5%HP-2301 type emulsion splitter solution simultaneously, under 114 ℃ of electric desalting temperature, carry out, electrical desalter interface 50%,

2), set up special-purpose emulsion splitter inlet: former injection phase is in the former oil-in of electrical desalter, transform inlet as and moves forward to crude oil and go into the device place;

3), adopt atmospheric tower only to open a normal line, vacuum distillation tower is only opened vacuum 1st side cut, second line of distillation;

4), vacuum column operation conditions: subtract serious reciprocal of duty cycle through optimizing, be controlled at 90kPa,, stop the one-level evacuation, only open two, three grades of evacuation, set up two, three grades of voltage-controlled adjustings of steam according to this index;

5), 118 ℃ of fore-running tower top temperatures, 350 ℃ of atmospheric pressure kiln temperature outs, 136 ℃ of Atmospheric Tower temperature, 345 ℃ of vacuum furnace temperature outs subtract 55 ℃ of top temperature, subtract serious reciprocal of duty cycle 90kPa.

Several Key Points is:

1), adopts the special-purpose emulsion splitter of oli oil

HP-2301 type emulsion splitter is a prior art, be exclusively used in the product of emulsified orinoco crude oil breaking emulsion and dewatering, the product that belongs to efficient nonionogenic tenside and high-efficiency dehydration agent complex class, its component has: aliphatic amide, Fatty Alcohol(C12-C14 and C12-C18), propylene oxide, oxyethane, solvent and water-removal additive, performance is: the pale brown look thick liquid of outward appearance, density (20 ℃) 0.85 ~ 0.99g.cm ^-3, effective content 〉=62%, colourity≤300APHA.

Because oli oil is overweight naphthenic base crude, density reaches 1011.1kg/m ³, differ minimum with the density of water, be unfavorable for oily water separation; Emulsified orinoco crude oil is moisture 29.7%, the stable emulsion that contains emulsifying agent 0.3-0.5%, belong to oil-in-water emulsion, use common emulsion splitter, the dewatering that employing is conventional is difficult to breakdown of emulsion crude oil and free water are separated, and adopts the light sump oil of adding 4% in mixing crude oil to add the special-purpose emulsion splitter solution of 800ppm lower concentration simultaneously, under 114 ℃ electric desalting, dehydration temperaturre, dehydrating effect is better.

2), set up special-purpose emulsion splitter inlet

Former injection phase is in the former oil-in of electrical desalter, and emulsion splitter is short action time, does not reach commingled crude dehydration required time.Therefore, inlet moves forward to crude oil and goes into the device place, has prolonged the action time of special-purpose emulsion splitter and crude oil, has dehydrating effect preferably, and water quality is more clear, and taking off back oil, to contain water lower, satisfies processing requirement.

3), adjusting process flow process

Because emulsified orinoco crude oil and the xinjiang viscous crude oil of mixing refining are heavy crude, light constituent is few, and device adopts atmospheric tower only to open a normal line, and vacuum distillation tower is only opened vacuum 1st side cut, second line of distillation, and flow process can be optimized, and systemic resistance reduces, and has reduced energy consumption.

4), optimize vacuum column operation conditions

When device is produced oil fuel, subtracting serious reciprocal of duty cycle is controlled at about 98kpa, as far as possible light constituents of extracting during the processing commingled crude, need be guaranteed the heavy duty road asphalt quality more, subtract serious reciprocal of duty cycle through optimizing, be controlled at about 90kPa,, stop the one-level evacuation according to this index, only open two, three grades of evacuation, set up two, three grades of voltage-controlled adjustings of steam.

5), device main operating parameters and vacuum residuum analytical data

After atmospheric and vacuum distillation unit process technological transformation and the Optimizing operation (operating parameters sees Table 5), the mixing vacuum residuum of producing of emulsified orinoco crude oil and xinjiang viscous crude oil entrusts Research Institute of Highway, Ministry of Communications to carry out comprehensive pitch analysis, analytical results (seeing Table 6) meets the technical requirements of " heavy traffic paving asphalt technical requirements " AH-90 bituminous fully.

Table 5 device main operating parameters

The electric desalting temperature/℃	????114
		The electrical desalter interface, %	????50
Special-purpose demulsifier concentration %	????2.5
		Emulsion splitter injection rate/ppm	????800
The fore-running tower top temperature/℃	????118
		The atmospheric pressure kiln temperature out/℃	????350
The Atmospheric Tower temperature/℃	????136
		The vacuum furnace temperature out/℃	????345
Subtract the top temperature/℃	????55
		Subtract serious reciprocal of duty cycle/kpa	????90

Table 6 commingled crude vacuum residuum analytical data

Project	Vacuum residuum	The AH-90 quality index
			Penetration degree (25 ℃, 100g, 5s)/(1/10) mm	????80.5	????80-100
Ductility (15 ℃)/cm	????＞150	????＞100
			Softening temperature (ring and ball method)/℃	????44	????42-52
Solubleness (trieline), %	????99.81	????＞99.0
			Flash-point (coc)/℃	????262	????230
Density (15 ℃)/g.cm -3	????1.0258	Actual observation record
			Wax content (distillation method), %	????2.3	????＜3.0
Thin Film Oven Test TFOT (163 ℃, 5h)
			Mass loss, %	????0.60	????＜1.0
Penetration ratio, %	????62.40	????＞50
			Ductility (15 ℃) ,/cm	????＞150	????＞75

Claims (1)

1, oli oil is mixed the processing method of refining xinjiang viscous crude oil Development and Production heavy duty road asphalt, it is characterized by, on the basis to the existing apparatus scrap build, with emulsified orinoco crude oil 35m ³/ h mixes refining xinjiang viscous crude oil 7m ³/ h, light sump oil 2.5m ³/ h charging is produced qualified AH-90 heavy duty road asphalt by adjusting process flow process and optimizing operation parameters, and it comprises:

1), the light sump oil that adds 4-5% in mixing crude oil adds the special-purpose emulsion splitter solution of 800-1000ppm concentration 2.5%HP-2301 type simultaneously, under 114 ℃ of electric desalting temperature, carry out, electrical desalter interface 50%,

2), set up special-purpose emulsion splitter inlet: former injection phase is in the former oil-in of electrical desalter, transform inlet as and moves forward to crude oil and go into the device place;

3), adopt atmospheric tower only to open a normal line, vacuum distillation tower is only opened vacuum 1st side cut, second line of distillation;

4), vacuum column operation conditions: subtract serious reciprocal of duty cycle through optimizing, be controlled at 90kPa,, stop the one-level evacuation, only open two, three grades of evacuation, set up two, three grades of voltage-controlled adjustings of steam according to this index;

5), 118 ℃ of fore-running tower top temperatures, 350 ℃ of atmospheric pressure kiln temperature outs, 136 ℃ of Atmospheric Tower temperature, 345 ℃ of vacuum furnace temperature outs subtract 55 ℃ of top temperature, subtract serious reciprocal of duty cycle 90kPa.