CN110699114A - Petroleum refining atmospheric and vacuum distillation device with improved water removal method - Google Patents
Petroleum refining atmospheric and vacuum distillation device with improved water removal method Download PDFInfo
- Publication number
- CN110699114A CN110699114A CN201911008773.3A CN201911008773A CN110699114A CN 110699114 A CN110699114 A CN 110699114A CN 201911008773 A CN201911008773 A CN 201911008773A CN 110699114 A CN110699114 A CN 110699114A
- Authority
- CN
- China
- Prior art keywords
- oil
- rubber
- atmospheric
- core tube
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
Abstract
The invention relates to a petroleum refining atmospheric and vacuum device with an improved water removal method. The technical scheme is as follows: a dehydrator is additionally arranged at the main oil supply pipeline at the front end of the atmospheric heating furnace to further remove the moisture in the crude oil entering the atmospheric distillation tower; and a fuel gas circulation pipeline is arranged at the top of the atmospheric distillation tower, one end of the circulation pipeline is communicated with the top of the atmospheric distillation tower, and the other end of the circulation pipeline is connected to the main oil supply pipeline behind the dehydrator in parallel, so that the fluidity of the main oil supply pipeline is increased. The beneficial effects are that: through the dehydrator that adds at the front end of original desalination dewatering device to add the circulating line, its one end and atmospheric distillation tower top intercommunication, the other end links to the oil supply main line behind the dehydrator on, has improved the temperature that gets into the atmospheric distillation tower, has increased the mobility of the crude oil of oil supply main line, like this, under the condition of less change oil refinery's structure, just effectual realization crude oil precipitation's purpose, great improvement follow-up atmospheric distillation and the efficiency of vacuum distillation.
Description
Technical Field
The invention relates to an improved petroleum refining atmospheric and vacuum device and a method thereof, in particular to a petroleum refining atmospheric and vacuum device with an improved water removal method.
Background
During the refining of petroleum, the crude oil produced from the formation contains mechanical impurities C in various quantities2Light hydrocarbon gas, water and NaCl, MgCl2、CaCl2When the inorganic salt crude oil is firstly treated by a dewatering device of an oil field, the water content is required to be reduced to<0.5% of salt content<50 mg/L. However, because the desalting and dewatering facilities of the oil field are imperfect or a large amount of water is mixed in the crude oil for convenience of crude oil transportation, the crude oil entering the oil refinery still contains unequal amounts of salt and water, the salt except a small part is in a crystalline state and suspended in the crude oil, and the large part is dissolved in water; most of the water is dispersed in the oil in the form of fine particles, forming a relatively stable water-in-oil emulsion.
In the refining of petroleum, atmospheric and vacuum distillation refers to the atmospheric distillation and vacuum distillation of crude oil, which are used for the first processing of crude oil, the crude oil is separated into oil products with different boiling point ranges according to the evaporation capacity in a distillation tower, some of the oil products are blended and added with additives and then delivered out in the form of products, and a considerable part of the oil products are raw materials of subsequent processing devices. The atmospheric and vacuum distillation is the first process of petroleum processing in a refinery and is a core part in the refinery, crude oil enters the refinery through pipelines, railways, tank cars and the like and is firstly desalted and dehydrated, and after desalting, the crude oil needs to enter atmospheric and vacuum equipment to separate heavy oil and light oil, so the atmospheric and vacuum distillation is a core part in oil refining. The method specifically comprises three working procedures: a. desalting and dehydrating crude oil; b. distilling under normal pressure; c. and (5) distilling under reduced pressure. Because crude oil generally contains salt and water, which can cause corrosion of equipment, crude oil is firstly subjected to desalting and dewatering pretreatment before entering atmospheric pressure and vacuum pressure, and crude oil dewatering equipment is also a representation of dewatering technology, and plays an important role in the crude oil dewatering process. Whether the structure of the dehydration equipment is reasonable or not is directly related to the dehydration effect, efficiency, crude oil quality and production and operation cost, and further the total economic benefit of crude oil dehydration production is influenced.
At present, pressure-resistant settling separation equipment, an advanced large-scale dehydration pressure-resistant container and an electric dehydrator are adopted, so that the efficiency is highest, the treatment capacity is high, and crude oil is dehydrated under the action of an electric field.
The two methods have the following problems: in the settling separation, a drying agent is generally adopted for water removal, so that the drying agent after water absorption needs to be continuously treated on site to recover the water absorption capacity, and a large workload is brought to the site work; the electric dehydration needs to consume a large amount of electric energy, has large energy consumption, is not in line with the energy-saving and environment-friendly idea advocated at present, and has certain problems in both the electric dehydration and the energy-saving and environment-friendly idea, so that the invention carries out local improvement on the process based on the process of adopting sedimentation separation and subsequent drying agent dehydration, reduces the process difficulty of the subsequent drying agent dehydration, improves the efficiency and greatly reduces the energy consumption.
Disclosure of Invention
The invention aims to provide a petroleum refining atmospheric and vacuum device with an improved water removal method aiming at the defects in the prior art, and the water removal device is additionally arranged at the front end of the existing desalting and dewatering device, so that the water content is further reduced, the subsequent drying and dewatering are easier, and the dewatering efficiency is greatly improved.
The invention provides a petroleum refining atmospheric and vacuum device with an improved water removal method, which adopts the technical scheme that: the device comprises an oil supply main pipeline (1), an atmospheric heating furnace (2), an atmospheric distillation tower (3), a reduced pressure distillation tower (4) and a reduced pressure suction pump (5), wherein the oil supply main pipeline (1) is connected to the atmospheric distillation tower (3) through the atmospheric heating furnace (2), the outlet of the atmospheric distillation tower (3) is connected to the reduced pressure heating furnace (6) and the reduced pressure distillation tower (4) through a heavy oil conveying pipe (20), the upper end of the atmospheric distillation tower (3) is connected with a fuel gas storage tank below C4 through a third liquid inlet valve (10), the lateral lines of the atmospheric distillation tower (3) are respectively provided with a C5-C11 fuel oil storage tank, a C11-C16 fuel oil storage tank and a C15-C18 fuel oil storage tank, and the bottom discharge is heavy oil above C39; the upper end of the reduced pressure distillation tower (4) is provided with a reduced pressure suction pump (5), the lateral line is respectively provided with a fuel oil storage tank, a lubricating oil storage tank and a paraffin storage tank, and the bottom discharge is asphalt; the improvement is as follows: a dehydrator (7) is additionally arranged at the main oil supply pipeline (1) at the front end of the atmospheric heating furnace (2) to further remove the moisture in the crude oil entering the atmospheric distillation tower (3); the top of the atmospheric distillation tower (3) is provided with a fuel gas circulating pipeline (21), one end of the circulating pipeline is communicated with the top of the atmospheric distillation tower (3), and the other end of the circulating pipeline is connected to the main oil supply pipeline (1) behind the dehydrator (7) in parallel, so that the fluidity of the main oil supply pipeline (1) is improved.
Preferably, a heavy oil circulating delivery pipe (22) is arranged on the heavy oil delivery pipe (20), one end of the heavy oil circulating delivery pipe (22) is connected to the heavy oil delivery pipe (20), the other end of the heavy oil circulating delivery pipe is connected to the C15-C18 fuel oil storage tank (15), and C15-C18 fuel oil molecules generated in the fractionation of the atmospheric distillation tower (3) are added into the heavy oil delivery pipe (20), so that the fluidity of the heavy oil delivery pipe (20) is enhanced.
Preferably, the dehydrator (7) comprises a connecting flange (7.1), a central sieve tube (7.2), a power cylinder sleeve (7.3), water storage expansion rubber (7.4), a rubber bearing frame (7.5), water absorption expansion rubber (7.6), a pressurizing piston (7.7), a liquid discharge hole (7.9) and a pressure sensor (7.10), wherein the connecting flange (7.1) is respectively arranged at two ends of the central sieve tube (7.2) and is used for being connected with the main oil supply pipeline (1), and a water absorption sieve hole is arranged in the middle of the central sieve tube (7.2); a power cylinder sleeve (7.3) is fixedly arranged on the outer side of the central sieve tube (7.2), the power cylinder sleeve (7.3) is provided with a liquid inlet hole (7.8) and a liquid outlet hole (7.9), two groups of water storage expansion rubber (7.4), a rubber bearing frame (7.5), water absorption expansion rubber (7.6) and a pressurizing piston (7.7) are arranged in a cavity formed between the power cylinder sleeve (7.3) and the central sieve tube (7.2), the two groups of rubber bearing frames (7.5) are respectively arranged on two sides of a water absorption sieve hole in the middle of the central sieve tube (7.2), the water absorption expansion rubber (7.6) is arranged between the two groups of rubber bearing frames (7.5), the water storage expansion rubber (7.4) is arranged between the rubber bearing frame (7.5) and the pressurizing piston (7.7), the water absorption expansion rubber (7.6) absorbs water in the crude oil main pipe of the oil supply line (1) through the water absorption sieve hole, and the water storage expansion rubber (7.4) further absorbs the water absorption expansion rubber (7.6) through, further removal of water in crude oil of the oil supply main pipeline (1) is realized by reciprocating extrusion of the water storage expansion rubber (7.4) through the pressurizing piston (7.7).
Preferably, the outer sides of the end covers at the two ends of the power cylinder sleeve (7.3) are respectively provided with a sensor switch (7.10) and a liquid inlet hole (7.8), and after the pressurizing piston (7.7) touches the sensor switch (7.10), high-pressure liquid is started and enters a cavity between the end cover and the pressurizing piston (7.7) through the liquid inlet hole (7.8), so that the pressurizing piston (7.7) is pushed to move inwards to extrude the water storage expansion rubber (7.4).
Preferably, the middle part of the power cylinder sleeve (7.3) is provided with a limit switch (7.23), and the pressurizing piston (7.7) stops pressurizing the liquid inlet hole (7.8) after moving inwards to the limit switch (7.23).
Preferably, the inner end of the power cylinder sleeve (7.3) is provided with a liquid discharge hole (7.9) close to the rubber bearing frame (7.5).
Preferably, the oil absorption core pipe is arranged in the middle of the central sieve pipe (7.2), the oil absorption core pipe comprises a core pipe main body (7.12), oil swelling rubber (7.13), rubber support frames (7.14), side oil inlets (7.15), side oil outlets (7.16), side adsorption holes (7.17) and a liquid passing channel (7.18), the inner cavity of the core pipe main body (7.12) is fixedly connected with the oil swelling rubber (7.13) through two groups of rubber support frames (7.14), the middle of the core pipe main body (7.12) is provided with a groove area, the groove area is communicated with the inner cavity of the core pipe main body (7.12) through the side oil inlets (7.15), one end of the liquid passing channel (7.18) is communicated with the inner cavity of the core pipe main body (7.12) through the side oil inlets (7.16), the other end of the core pipe between the two groups of rubber support frames (7.14) is provided with a plurality of side adsorption holes (7.17), and crude oil enters the liquid passing channel (7.18) through the side oil outlets (7.15), an annular liquid passing area is formed, the oil swelling rubber (7.13) on the inner side adsorbs crude oil of crude oil through the side adsorption holes (7.17), and the water swelling rubber (7.6) of the central sieve tube (7.2) adsorbs water in the crude oil.
Preferably, the core pipe main body (7.12) is provided with an external thread, and is matched and connected with the internal thread of the center screen pipe (7.2) through the external thread.
Preferably, the inner cavity of the central sieve tube (7.2) is provided with an oil absorption core tube, the oil absorption core tube comprises a core tube main body (7.12), rubber (7.13) capable of expanding when encountering oil, rubber support frames (7.14), a side oil inlet (7.15), a side oil outlet (7.16), a side oil suction hole (7.17), a liquid passing channel (7.18), a core tube sleeve (7.19), a core tube piston (7.20), a core tube liquid inlet hole (7.21) and a core tube pressure sensor (7.22), the inner cavity of the core tube main body (7.12) is provided with two groups of rubber support frames (7.14), the outer side of the left rubber support frame (7.14) is connected with the core tube sleeve (7.19) with an opening at the right end, the core tube piston (7.20) and rubber (7.13) capable of expanding when encountering oil are arranged in the core tube sleeve (7.19), the rubber (7.13) capable of expanding when encountering oil is filled in a cavity between the two groups of rubber support frames (7.14), and a, a liquid passing channel (7.18) is formed between the groove area and the central sieve tube (7.2), one end of the liquid passing channel (7.18) is communicated with the inner cavity of the core tube main body (7.12) through a side oil inlet (7.15), and the other end of the liquid passing channel is communicated with the inner cavity of the core tube main body (7.12) through a side oil outlet (7.16); a core pipe liquid inlet hole (7.21) is arranged between the core pipe sleeve (7.19) and the core pipe piston (7.20), and the core pipe piston (7.20) can be pushed to move, so that the rubber (7.13) which expands when meeting oil is extruded; the rubber (7.13) which expands when meeting oil absorbs crude oil from the liquid passing channel (7.18) through the side oil sucking hole (7.17); a core tube pressure sensor (7.22) is arranged at the left end part of the core tube sleeve (7.19).
Preferably, the water absorption capacity of the water-retaining swelling rubber (4) is larger than that of the water-absorbing swelling rubber (6), and the ratio of the water absorption capacity to the water absorption capacity is 2: 5, so that a large amount of water is stored in the impoundment expansion rubber (4).
The invention has the beneficial effects that: firstly, through the dehydrator additionally arranged at the front end of the original desalting and dewatering device and the circulating pipeline additionally arranged, one end of the circulating pipeline is communicated with the top of the atmospheric distillation tower, and the other end of the circulating pipeline is connected to the oil supply main pipeline behind the dehydrator in parallel, so that the temperature of the crude oil entering the atmospheric distillation tower is improved, and the flowability of the crude oil of the oil supply main pipeline is increased, therefore, under the condition of slightly changing the structure of an oil refinery, the purpose of crude oil precipitation is effectively realized, and the efficiency of subsequent atmospheric distillation and reduced pressure distillation is greatly improved; the adopted dehydrator is a brand new dehydration device, the crude oil liquid flowing through the dehydrator firstly forms an annular overflowing channel, then, water absorption expansion rubber is arranged on the outer side of the annular overflowing channel, continuous water absorption is realized in a mechanical mode, and oil absorption expansion rubber is arranged in the inner cavity of the annular overflowing channel, and continuous oil absorption can also be realized in a mechanical mode, so that the crude oil passing through the dehydrator can be dehydrated for one time firstly, the pressure of subsequent dehydration is reduced, and the dehydration device can be effectively matched with a subsequent desalting and dehydrating device to control the water content of the petroleum entering the atmospheric and vacuum distillation device to be less than 0.5%; thirdly, in order to realize effective dehydration, water absorption expansion rubber and water storage expansion rubber are arranged in the dehydrator, the water absorption capacity of the water storage expansion rubber is greater than that of the water absorption expansion rubber, and the water absorption capacity ratio is 2: 5, a large amount of water is stored in the water storage expansion rubber, and then the water of the water storage expansion rubber is discharged in time through the extrusion of the pressurizing piston, so that the continuous water absorption is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a first embodiment of the dehydrator;
FIG. 3 is a schematic structural view of a water absorbing part of the dehydrator;
FIG. 4 is a schematic view of the A-A structure of FIG. 3;
FIG. 5 is a schematic structural view of a second embodiment of the dehydrator;
FIG. 6 is a schematic structural view of a third embodiment of the dehydrator;
in the upper diagram: the system comprises an oil supply main pipeline 1, an atmospheric heating furnace 2, an atmospheric distillation tower 3, a reduced pressure distillation tower 4, a reduced pressure suction pump 5, a reduced pressure heating furnace 6, a dehydrator 7, a first liquid inlet valve 8, a second liquid inlet valve 9, a third liquid inlet valve 10, a fourth liquid inlet valve 11, an atmospheric liquid outlet valve 12, a C5-C11 fuel oil storage tank 13, a C11-C16 fuel oil storage tank 14 and a C15-C18 fuel oil storage tank 15, a fuel oil storage tank 16, a lubricating oil storage tank 17, a paraffin storage tank 18, asphalt 19, a heavy oil conveying pipe 20, a fuel gas circulating pipeline 21, a heavy oil circulating conveying pipe 22, a diesel oil storage tank 23, a petroleum gas storage tank 24 below C4, a desalting and dehydrating device 25, and a heavy oil outlet 26;
the device comprises a connecting flange 7.1, a central sieve tube 7.2, a power cylinder sleeve 7.3, water storage expansion rubber 7.4, a rubber bearing frame 7.5, water absorption expansion rubber 7.6, a pressurizing piston 7.7, a liquid inlet hole 7.8, a liquid discharge hole 7.9, a pressure sensor 7.10, a central sieve hole 7.11, a core tube main body 7.12, oil encountering expansion rubber 7.13, a rubber support frame 7.14, a side oil inlet 7.15, a side oil outlet 7.16, a side adsorption hole 7.17, a liquid passing channel 7.18, a core tube sleeve 7.19, a core tube piston 7.20, a core tube liquid inlet hole 7.21, a core tube pressure sensor 7.22, a limit switch 7.23 and a water absorption bulge 7.24.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Wherein, the heavy oil conveying pipe 20 is provided with a heavy oil circulating conveying pipe 22, one end of the heavy oil circulating conveying pipe 22 is connected to the heavy oil conveying pipe 20, and the other end is connected to the C15-C18 fuel oil storage tank 15, and C15-C18 fuel oil molecules generated in the fractionation of the atmospheric distillation tower 3 are added into the heavy oil conveying pipe 20, so as to enhance the mobility of the heavy oil conveying pipe 20.
Wherein, the C5-C11 fuel oil storage tank 13 is mainly used as gasoline engine fuel, the C11-C16 fuel oil storage tank 14 is mainly used as kerosene fuel, and the C15-C18 fuel oil storage tank 15 is mainly used as diesel fuel.
Referring to the attached figure 2, the dehydrator 7 provided by the invention comprises a connecting flange 7.1, a central sieve tube 7.2, a power cylinder sleeve 7.3, water storage expansion rubber 7.4, a rubber bearing frame 7.5, water absorption expansion rubber 7.6, a pressurizing piston 7.7, a liquid discharge hole 7.9 and a pressure sensor 7.10, wherein the two ends of the central sieve tube 7.2 are respectively provided with the connecting flange 7.1 for being connected with an oil supply main pipeline 1, and the middle part of the central sieve tube 7.2 is provided with a water absorption sieve hole; a power cylinder sleeve 7.3 is fixedly arranged on the outer side of the central sieve tube 7.2, the power cylinder sleeve 7.3 is provided with a liquid inlet hole 7.8 and a liquid outlet hole 7.9, water storage expansion rubber 7.4, a rubber bearing frame 7.5, water absorption expansion rubber 7.6 and a pressurizing piston 7.7 are arranged in a cavity formed between the power cylinder sleeve 7.3 and the central sieve tube 7.2, two groups of rubber bearing frames 7.5 are respectively arranged at two sides of a water-absorbing sieve pore at the middle part of the central sieve tube 7.2, and water-absorbing expansion rubber 7.6 is arranged between the two groups of rubber bearing frames 7.5, a water storage expansion rubber 7.4 is arranged between the rubber bearing frame 7.5 and the pressurizing piston 7.7, the water absorption expansion rubber 7.6 absorbs water in the crude oil of the oil supply main pipeline 1 through a water absorption sieve pore, the water storage expansion rubber 7.4 further absorbs the water absorption expansion rubber 7.6, further removal of water in crude oil of the main oil supply pipeline 1 is realized by reciprocating extrusion of the water storage expansion rubber 7.4 through the pressurizing piston 7.7.
Wherein, the outer side of the end cover at both ends of the power cylinder sleeve 7.3 is respectively provided with a sensor switch 7.10 and a liquid inlet hole 7.8, after the pressurizing piston 7.7 touches the sensor switch 7.10, high-pressure liquid is started and enters a cavity between the end cover and the pressurizing piston 7.7 through the liquid inlet hole 7.8, thereby pushing the pressurizing piston 7.7 to move inwards to extrude the water storage expansion rubber 7.4.
In addition, the middle part of the power cylinder sleeve 7.3 is provided with a limit switch 7.23, and the pressurizing piston 7.7 stops pressurizing to the liquid inlet hole 7.8 after moving inwards to the limit switch 7.23.
Preferably, a liquid discharge hole 7.9 is arranged at the inner end of the power cylinder sleeve 7.3 close to the rubber bearing frame 7.5, and water of the impounded water expansion rubber is discharged through the liquid discharge hole.
Referring to the attached figure 2, the oil absorption core pipe is arranged in the middle of the central sieve pipe 7.2, the oil absorption core pipe comprises a core pipe main body 7.12, oil swelling rubber 7.13, rubber support frames 7.14, a side oil inlet 7.15, a side oil outlet 7.16, a side adsorption hole 7.17 and a liquid passing channel 7.18, the inner cavity of the core pipe main body 7.12 is fixed with the oil swelling rubber 7.13 through two groups of rubber support frames 7.14, the middle of the core pipe main body 7.12 is provided with a groove area, the liquid passing channel 7.18 is formed between the groove area and the central sieve pipe 7.2, one end of the liquid passing channel 7.18 is communicated with the inner cavity of the core pipe main body 7.12 through the side oil inlet 7.15, the other end is communicated with the inner cavity of the core pipe main body 7.12 through the side oil outlet 7.16, a plurality of side adsorption holes 7.17 are arranged on the core pipe between the two groups of rubber support frames 7.14, crude oil enters the liquid passing channel 7.18 through the oil inlet 7.15 to form a side liquid passing area, and the side oil, the water swellable rubber 7.6 of the central screen 7.2 absorbs water therein.
Preferably, the core tube main body 7.12 is provided with an external thread, and is matched and connected with the internal thread of the center screen tube 7.2 through the external thread,
in addition, it should be noted that: the water storage expansion rubber and the water absorption expansion rubber are water expansion rubber sold in the market, the water absorption capacity of the water storage expansion rubber 4 is required to be larger than that of the water absorption expansion rubber 6, and the water absorption capacity ratio is 2: 5, the water absorption expansion rubber 6 can continuously absorb water from the crude oil, the water storage expansion rubber 4 continuously absorbs the water of the water absorption expansion rubber to the water storage expansion rubber, and then the water of the water storage expansion rubber is extruded in an extrusion mode to realize continuous water absorption.
The invention provides a using method of a petroleum refining atmospheric and vacuum device with an improved water removal method, which comprises the following steps:
firstly, crude oil enters a dehydrator through a main oil supply pipeline 1, the crude oil firstly enters an annular liquid passing channel 7.18 through a side oil inlet 7.15, oil swelling rubber 7.13 absorbs the crude oil of the crude oil through a side absorption hole 7.17, and water swelling rubber 7.6 absorbs water in the crude oil through a water absorption sieve pore, so that the crude oil and the water are separated;
secondly, as the adsorption force of the water-absorbing expansion rubber is smaller than that of the impounded expansion rubber, the adsorbed water is continuously absorbed by the impounded expansion rubber on the two sides, the impounded expansion rubber is arranged in the inner cavity of the power cylinder sleeve, the outer sides of the end covers at the two ends of the power cylinder sleeve 7.3 are respectively provided with a sensor switch 7.10 and a liquid inlet hole 7.8, after the pressurizing piston 7.7 touches the sensor switch 7.10, high-pressure liquid is started and enters a cavity between the end cover and the pressurizing piston 7.7 through the liquid inlet hole 7.8, so that the pressurizing piston 7.7 is pushed to move inwards to extrude the impounded expansion rubber 7.4, moisture in the impounded expansion rubber 7.4 is discharged through a liquid outlet hole 7.9, when the pressurizing piston 7.7 touches the limit switch 7.23, the pressurizing piston 7.7 starts to move to the end cover of the power cylinder sleeve 7.3 in the process of continuous water-absorbing expansion rubber 7.4 until touching the sensor switch 7.10 to stop, and the high-pressure liquid is started again, the pressurizing piston 7.7 extrudes the water storage expansion rubber 7.4 again, the reciprocating motion is realized, and the continuous water absorption of the crude oil is realized;
the water content of the crude oil after passing through the dehydrator is greatly reduced, the crude oil enters the atmospheric distillation tower through the desalting and dehydrating device 25, a fuel gas circulating pipeline 21 is arranged at the top of the atmospheric distillation tower 3, one end of the circulating pipeline is communicated with the top of the atmospheric distillation tower 3, the other end of the circulating pipeline is connected to the oil supply main pipeline 1 after the dehydrator 7 in parallel, high-temperature fuel gas flows to the oil supply main pipeline 1, the flowability of the crude oil of the oil supply main pipeline 1 is improved, and after the crude oil is distilled by the atmospheric distillation tower 3, C5-C11 fuel oil, C11-C16 fuel oil and C15-C18 fuel oil can be obtained from the side line;
and fourthly, the outlet end of the atmospheric distillation tower is connected with a reduced pressure distillation tower 4 through a heavy oil conveying pipe 20, the upper end of the reduced pressure distillation tower 4 is provided with a reduced pressure suction pump 5, the heavy oil conveying pipe 20 is provided with a heavy oil circulating conveying pipe 22, one end of the heavy oil circulating conveying pipe 22 is connected to the heavy oil conveying pipe 20, and the other end of the heavy oil circulating conveying pipe 22 is connected to a C15-C18 fuel oil storage tank, so that the fluidity of the heavy oil conveying pipe 20 is increased, and the fuel oil, the lubricating oil, the paraffin and the asphalt are obtained from the lateral line of the.
The invention has the advantages that: firstly, through the dehydrator additionally arranged at the front end of the original desalting and dewatering device and the circulating pipeline additionally arranged, one end of the circulating pipeline is communicated with the top of the atmospheric distillation tower, and the other end of the circulating pipeline is connected to the oil supply main pipeline behind the dehydrator in parallel, so that the temperature of the crude oil entering the atmospheric distillation tower is improved, and the flowability of the crude oil of the oil supply main pipeline is increased, therefore, under the condition of slightly changing the structure of an oil refinery, the purpose of crude oil precipitation is effectively realized, and the efficiency of subsequent atmospheric distillation and reduced pressure distillation is greatly improved; the adopted dehydrator is a brand new dehydration device, the liquid of the flowing crude oil firstly forms an annular overflow channel, then, water absorption expansion rubber is arranged on the outer side of the annular overflow channel, continuous water absorption is realized in a mechanical mode, the oil absorption expansion rubber is arranged in the inner cavity of the annular overflow channel, and continuous oil absorption can also be realized in a mechanical mode, so that the crude oil passing through the dehydrator can be dehydrated for one time, the pressure of subsequent dehydration is reduced, and the water content of the petroleum can be effectively controlled to be less than 0.5%; thirdly, in order to realize effective dehydration, water absorption expansion rubber and water storage expansion rubber are arranged in the dehydrator, the water absorption capacity of the water storage expansion rubber is greater than that of the water absorption expansion rubber, and the water absorption capacity ratio is 2: 5, a large amount of water is stored in the water storage expansion rubber, and then the water of the water storage expansion rubber is discharged in time through the extrusion of the pressurizing piston, so that the continuous water absorption is realized.
Example 2, the difference of the invention from example 1 is:
referring to the attached figure 5, the inner cavity of the central sieve tube 7.2 of the invention is provided with an oil absorption core tube, the oil absorption core tube comprises a core tube main body 7.12, oil swelling rubber 7.13, rubber support frames 7.14, a side oil inlet 7.15, a side oil outlet 7.16, a side oil suction hole 7.17, a liquid passing channel 7.18, a core tube sleeve 7.19, a core tube piston 7.20, a core tube liquid inlet 7.21 and a core tube pressure sensor 7.22, the inner cavity of the core tube main body 7.12 is provided with two groups of rubber support frames 7.14, the outer side of the left rubber support frame 7.14 is connected with the core tube sleeve 7.19 with an open right end, the core tube piston 7.20 and the oil swelling rubber 7.13 are arranged in the core tube sleeve 7.19, the oil swelling rubber 7.13 is filled in a cavity between the core tube sleeve 7.19 and the two groups of rubber support frames 7.14, the middle part of the core tube main body 7.12 is provided with a groove area, the liquid passing channel 7.18 is communicated with the inner cavity of the central sieve tube main body 7.2, the other end is communicated with the inner cavity of the core tube main body 7.12 through a side oil outlet 7.16; a core pipe liquid inlet hole 7.21 is arranged between the core pipe sleeve 7.19 and the core pipe piston 7.20, and can push the core pipe piston 7.20 to move, so that the rubber 7.13 which expands when being exposed to oil is extruded; the rubber 7.13 expanded with oil absorbs the crude oil from the liquid passing channel 7.18 through the side oil absorption hole 7.17; a core tube pressure sensor 7.22 is provided at the left end of the core tube sleeve 7.19.
According to the invention, by adding the core tube piston and the core tube sleeve, the rubber 7.13 expanding when meeting oil can be extruded back and forth, so that continuous oil absorption and oil discharge of the rubber expanding when meeting oil are realized, the crude oil separation capacity is improved, and the water removal effect is further improved.
Example 3, the difference of the invention from example 2 is:
in order to improve the water absorption capacity, the power cylinder sleeve can adopt a whole cylinder, and the middle part of the power cylinder sleeve is provided with a water absorption bulge part 7.24, so that the volume of an inner cavity is increased, more water absorption expansion rubber is arranged, and the water absorption effect is better; the power cylinder sleeve is connected to the outer side of the rubber bearing frame 7.5 through threads, the rubber bearing frame 7.5 is welded on the outer wall of the central sieve tube, and the two rubber bearing frames 7.5 are positioned on two sides of the water absorption sieve pore.
Example 4, the difference of the invention from example 3 is:
in order to improve the water absorption capacity, the power cylinder sleeve still adopts two sleeve structures, and the middle part of the power cylinder sleeve is connected to the two power cylinder sleeves through the water absorption convex shell in a threaded manner, so that the volume of a formed water absorption inner cavity is increased, more water absorption expansion rubber is arranged, and the water absorption effect is better; the two split power cylinder sleeves are connected to the outer sides of the rubber bearing frames 7.5 through threads and are easy to assemble, the rubber bearing frames 7.5 are welded on the outer wall of the central sieve tube, and the two rubber bearing frames 7.5 are located on two sides of the water absorption sieve hole.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (10)
1. A petroleum refining atmospheric and vacuum device for improving a water removal method comprises an oil supply main pipeline (1), an atmospheric heating furnace (2), an atmospheric distillation tower (3), a vacuum distillation tower (4) and a vacuum suction pump (5), wherein the oil supply main pipeline (1) is connected to the atmospheric distillation tower (3) through the atmospheric heating furnace (2), an outlet of the atmospheric distillation tower (3) is connected to the vacuum heating furnace (6) and the vacuum distillation tower (4) through a heavy oil conveying pipe (20), the upper end of the atmospheric distillation tower (3) is connected with a fuel gas storage tank below C4 through a third liquid inlet valve (10), the side lines of the atmospheric distillation tower (3) are respectively provided with a C5-C11 fuel oil storage tank (13), a C11-C16 fuel oil storage tank (14) and a C15-C18 fuel oil storage tank (15), and the bottom discharge is heavy oil above C20; the upper end of the reduced pressure distillation tower (4) is provided with a reduced pressure suction pump (5), the lateral line is respectively provided with a fuel oil storage tank (16), a lubricating oil storage tank (17) and a paraffin storage tank (18), and the bottom discharge is asphalt (19); the method is characterized in that: a dehydrator (7) is additionally arranged at the main oil supply pipeline (1) at the front end of the atmospheric heating furnace (2) to further remove the moisture in the crude oil entering the atmospheric distillation tower (3); the top of the atmospheric distillation tower (3) is provided with a fuel gas circulating pipeline (21), one end of the circulating pipeline is communicated with the top of the atmospheric distillation tower (3), and the other end of the circulating pipeline is connected to the main oil supply pipeline (1) behind the dehydrator (7) in parallel, so that the fluidity of the main oil supply pipeline (1) is improved.
2. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 1, wherein: the heavy oil conveying pipe (20) is provided with a heavy oil circulating conveying pipe (22), one end of the heavy oil circulating conveying pipe (22) is connected to the heavy oil conveying pipe (20), the other end of the heavy oil circulating conveying pipe is connected to a C15-C18 fuel oil storage tank (15), and C15-C18 fuel oil molecules generated in the fractionation of the atmospheric distillation tower (3) are added into the heavy oil conveying pipe (20), so that the fluidity of the heavy oil conveying pipe (20) is enhanced.
3. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 1, wherein: the dehydrator (7) comprises a connecting flange (7.1), a central sieve tube (7.2), a power cylinder sleeve (7.3), water storage expansion rubber (7.4), a rubber bearing frame (7.5), water absorption expansion rubber (7.6), a pressurizing piston (7.7), a liquid discharge hole (7.9) and a pressure sensor (7.10), wherein the connecting flange (7.1) is arranged at each of two ends of the central sieve tube (7.2) and used for being connected with the main oil supply pipeline (1), and a water absorption sieve hole is arranged in the middle of the central sieve tube (7.2); a power cylinder sleeve (7.3) is fixedly arranged on the outer side of the central sieve tube (7.2), the power cylinder sleeve (7.3) is provided with a liquid inlet hole (7.8) and a liquid outlet hole (7.9), two groups of water storage expansion rubber (7.4), a rubber bearing frame (7.5), water absorption expansion rubber (7.6) and a pressurizing piston (7.7) are arranged in a cavity formed between the power cylinder sleeve (7.3) and the central sieve tube (7.2), the two groups of rubber bearing frames (7.5) are respectively arranged on two sides of a water absorption sieve hole in the middle of the central sieve tube (7.2), the water absorption expansion rubber (7.6) is arranged between the two groups of rubber bearing frames (7.5), the water storage expansion rubber (7.4) is arranged between the rubber bearing frame (7.5) and the pressurizing piston (7.7), the water absorption expansion rubber (7.6) absorbs water in the crude oil main pipe of the oil supply line (1) through the water absorption sieve hole, and the water storage expansion rubber (7.4) further absorbs the water absorption expansion rubber (7.6) through, further removal of water in crude oil of the oil supply main pipeline (1) is realized by reciprocating extrusion of the water storage expansion rubber (7.4) through the pressurizing piston (7.7).
4. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 3, wherein: and sensor switches (7.10) and liquid inlet holes (7.8) are respectively arranged on the outer sides of the end covers at the two ends of the power cylinder sleeve (7.3), and after the pressurizing piston (7.7) touches the sensor switches (7.10), high-pressure liquid is started and enters a cavity between the end cover and the pressurizing piston (7.7) through the liquid inlet holes (7.8), so that the pressurizing piston (7.7) is pushed to move inwards to extrude the water storage expansion rubber (7.4).
5. The atmospheric and vacuum petroleum refining apparatus with improved water removal method as set forth in claim 4, wherein: and a limit switch (7.23) is arranged in the middle of the power cylinder sleeve (7.3), and the pressurizing piston (7.7) stops pressurizing the liquid inlet hole (7.8) after moving inwards to the limit switch (7.23).
6. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 3, wherein: and a liquid discharge hole (7.9) is formed at the inner end of the power cylinder sleeve (7.3) close to the rubber bearing frame (7.5).
7. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 3, wherein: the middle part of the central sieve tube (7.2) is provided with an oil absorption core tube, the oil absorption core tube comprises a core tube main body (7.12), oil swelling rubber (7.13), rubber support frames (7.14), side oil inlets (7.15), side oil outlets (7.16), side adsorption holes (7.17) and a liquid passing channel (7.18), the inner cavity of the core tube main body (7.12) is fixedly provided with the oil swelling rubber (7.13) through two groups of rubber support frames (7.14), the middle part of the core tube main body (7.12) is provided with a groove area, the groove area and the central sieve tube (7.2) form the liquid passing channel (7.18), one end of the liquid passing channel (7.18) is communicated with the inner cavity of the core tube main body (7.12) through the side oil inlets (7.15), the other end of the liquid passing channel is communicated with the inner cavity of the core tube main body (7.12) through the side oil outlets (7.16), a plurality of side adsorption holes (7.17) are arranged on the core tube between the two groups of rubber support frames (7.14), and crude oil, an annular liquid passing area is formed, the oil swelling rubber (7.13) on the inner side adsorbs crude oil of crude oil through the side adsorption holes (7.17), and the water swelling rubber (7.6) of the central sieve tube (7.2) adsorbs water in the crude oil.
8. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 3, wherein: the core pipe main body (7.12) is provided with external threads, and is connected with the internal threads of the central sieve pipe (7.2) in a matched mode through the external threads.
9. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 3, wherein: the inner cavity of the central sieve tube (7.2) is provided with an oil absorption core tube, the oil absorption core tube comprises a core tube main body (7.12), rubber (7.13) expanding when encountering oil, rubber support frames (7.14), a side oil inlet (7.15), a side oil outlet (7.16), a side oil suction hole (7.17), a liquid passing channel (7.18), a core tube sleeve (7.19), a core tube piston (7.20), a core tube liquid inlet (7.21) and a core tube pressure sensor (7.22), the inner cavity of the core tube main body (7.12) is provided with two groups of rubber support frames (7.14), the outer side of the left rubber support frame (7.14) is connected with the core tube sleeve (7.19) with an opening at the right end, the core tube piston (7.20) and the rubber (7.13) expanding when encountering oil are arranged in the core tube sleeve (7.19), the rubber (7.13) expanding when encountering oil is filled in a cavity between the core tube sleeve (7.19) and the two groups of rubber support frames (7, a liquid passing channel (7.18) is formed between the groove area and the central sieve tube (7.2), one end of the liquid passing channel (7.18) is communicated with the inner cavity of the core tube main body (7.12) through a side oil inlet (7.15), and the other end of the liquid passing channel is communicated with the inner cavity of the core tube main body (7.12) through a side oil outlet (7.16); a core pipe liquid inlet hole (7.21) is arranged between the core pipe sleeve (7.19) and the core pipe piston (7.20), and the core pipe piston (7.20) can be pushed to move, so that the rubber (7.13) which expands when meeting oil is extruded; the rubber (7.13) which expands when meeting oil absorbs crude oil from the liquid passing channel (7.18) through the side oil sucking hole (7.17); a core tube pressure sensor (7.22) is arranged at the left end part of the core tube sleeve (7.19).
10. The atmospheric and vacuum petroleum refining plant with improved water removal method as set forth in claim 3, wherein: the water absorption capacity of the water storage expansion rubber (4) is greater than that of the water absorption expansion rubber (6), and the water absorption capacity ratio is 2: 5, so that a large amount of water is stored in the impoundment expansion rubber (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008773.3A CN110699114B (en) | 2019-10-23 | 2019-10-23 | Petroleum refining atmospheric and vacuum distillation device with improved water removal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008773.3A CN110699114B (en) | 2019-10-23 | 2019-10-23 | Petroleum refining atmospheric and vacuum distillation device with improved water removal method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110699114A true CN110699114A (en) | 2020-01-17 |
| CN110699114B CN110699114B (en) | 2020-12-29 |
Family
ID=69201046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911008773.3A Active CN110699114B (en) | 2019-10-23 | 2019-10-23 | Petroleum refining atmospheric and vacuum distillation device with improved water removal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110699114B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159474A (en) * | 1995-12-04 | 1997-09-17 | 多塔乐精制销售有限公司 | Process for degreasing viscosity of fed heavy hydrocarbon and equipment improvement |
| CN1454965A (en) * | 2003-05-08 | 2003-11-12 | 中国石化集团洛阳石油化工工程公司 | Petroleum atmospheric vacuum distillation process and unit |
| CN101624535A (en) * | 2009-08-03 | 2010-01-13 | 中海石油炼化有限责任公司 | Atmospheric and vacuum distillation device and atmospheric and vacuum distillation method of high acid-content crude oil |
| CN101993722A (en) * | 2010-11-11 | 2011-03-30 | 陕西国力能源有限公司 | Oil refining process |
| CN103102926A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Crude oil electric desalting, and electric desalting sewage treatment method |
| CN103289729A (en) * | 2013-06-28 | 2013-09-11 | 华东理工大学 | Crude oil desalting method and device of electric field-rotational flow combination |
| CN204281685U (en) * | 2014-09-09 | 2015-04-22 | 上海博荟化工有限公司 | A kind of vacuum distillation apparatus |
| CN106246143A (en) * | 2016-08-26 | 2016-12-21 | 中国石油化工股份有限公司 | The water control method of a kind of water outlet oil reservoir and control water sand control pipe thereof |
| CN208136165U (en) * | 2018-04-27 | 2018-11-23 | 洛阳维达石化工程有限公司 | A kind of atmospheric and vacuum distillation unit |
| CN108911032A (en) * | 2018-07-30 | 2018-11-30 | 刘玉友 | The no filtrate sewage-treatment plant of oil field gathering and transportation |
-
2019
- 2019-10-23 CN CN201911008773.3A patent/CN110699114B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159474A (en) * | 1995-12-04 | 1997-09-17 | 多塔乐精制销售有限公司 | Process for degreasing viscosity of fed heavy hydrocarbon and equipment improvement |
| CN1454965A (en) * | 2003-05-08 | 2003-11-12 | 中国石化集团洛阳石油化工工程公司 | Petroleum atmospheric vacuum distillation process and unit |
| CN101624535A (en) * | 2009-08-03 | 2010-01-13 | 中海石油炼化有限责任公司 | Atmospheric and vacuum distillation device and atmospheric and vacuum distillation method of high acid-content crude oil |
| CN101993722A (en) * | 2010-11-11 | 2011-03-30 | 陕西国力能源有限公司 | Oil refining process |
| CN103102926A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Crude oil electric desalting, and electric desalting sewage treatment method |
| CN103289729A (en) * | 2013-06-28 | 2013-09-11 | 华东理工大学 | Crude oil desalting method and device of electric field-rotational flow combination |
| CN204281685U (en) * | 2014-09-09 | 2015-04-22 | 上海博荟化工有限公司 | A kind of vacuum distillation apparatus |
| CN106246143A (en) * | 2016-08-26 | 2016-12-21 | 中国石油化工股份有限公司 | The water control method of a kind of water outlet oil reservoir and control water sand control pipe thereof |
| CN208136165U (en) * | 2018-04-27 | 2018-11-23 | 洛阳维达石化工程有限公司 | A kind of atmospheric and vacuum distillation unit |
| CN108911032A (en) * | 2018-07-30 | 2018-11-30 | 刘玉友 | The no filtrate sewage-treatment plant of oil field gathering and transportation |
Non-Patent Citations (1)
| Title |
|---|
| 曾坚贤等: "《化工实习》", 30 June 2014, 中国矿业大学出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110699114B (en) | 2020-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103980934B (en) | Deep dehydrating method and device for oil product | |
| WO2016127273A1 (en) | Method and apparatus for strengthening oil-water separation and coupled desalting functions in cold low pressure separator | |
| CN103739175A (en) | Method for processing oil sludge | |
| CN101967390A (en) | Method and equipment for dehydrating crude oil | |
| CN106590731B (en) | SAGD Produced Liquid closed processes devices and treatment process | |
| CN102504851B (en) | Equipment and process for producing light tar by controlling QI (Quality Index) value of tar | |
| CN104531327A (en) | Environmental regeneration device for waste oil | |
| CN110699114B (en) | Petroleum refining atmospheric and vacuum distillation device with improved water removal method | |
| CN110699110B (en) | Water trap is used in petroleum refining atmospheric and vacuum | |
| CN105776704A (en) | Super-high power ultrasonic sump oil emulsion breaking dehydration method | |
| CN210140556U (en) | High-efficient dewatering device of ageing crude oil vacuum flash distillation | |
| CN111040805A (en) | Crude oil pre-dehydration, deep dehydration and sewage oil removal integrated device and method | |
| CN208340176U (en) | A kind of novel bicyclic pentadiene dehydration refining system | |
| CN201526306U (en) | Energy-saving type separating, heating, precipitating and buffering integrated device | |
| CN202297545U (en) | Oil reclaimer | |
| CN105327527A (en) | Rapid demulsification dehydration method used for water-in-oil emulsion | |
| CN101676366A (en) | Thermoelectric composite crude oil processor | |
| CN101353592B (en) | Method and apparatus for diesel acid stripping | |
| CN114922607B (en) | Oil field crude oil dehydration desalination collection and transportation process package | |
| CN107619170B (en) | A kind of curing and drying processing method of paper mill sludge | |
| CN204661634U (en) | A kind of Mobile lubrication oil three combined dehydration devices | |
| CN111349457B (en) | High-voltage pulse electric field-cyclone centrifugal field combined lubricating oil demulsification dehydration device | |
| CN205241285U (en) | Oi contg sewage treatment system | |
| CN105148565B (en) | A kind of method of the super oleophylic of ultrasonic assistant/super hydrophobic material breaking emulsion and dewatering | |
| CN211814283U (en) | Refinery sump oil and scum decompression dewatering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |