CN113546556A - Solid heavy oil-containing storage tank device and oil storage method - Google Patents
Solid heavy oil-containing storage tank device and oil storage method Download PDFInfo
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- CN113546556A CN113546556A CN202110998622.8A CN202110998622A CN113546556A CN 113546556 A CN113546556 A CN 113546556A CN 202110998622 A CN202110998622 A CN 202110998622A CN 113546556 A CN113546556 A CN 113546556A
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Abstract
The invention discloses a solid heavy oil-containing storage tank device and an oil storage method, wherein the solid heavy oil-containing storage tank device comprises a heavy oil tank, a main shaft is rotatably connected in an inner cavity of the heavy oil tank, a plurality of stirring blades are fixedly connected to the main shaft, the stirring blades are arranged in parallel along the length direction of the main shaft, one end of the main shaft is connected with a rotating device at the top of the heavy oil tank, and the other end of the main shaft is not contacted with the bottom of the heavy oil tank. The invention can effectively reduce the deposition of solid particles at the bottom of the storage tank and ensure the continuous long-period operation of the heavy oil tank.
Description
Technical Field
The invention belongs to the technical field of petrochemical industry and coal chemical industry production, and particularly belongs to a solid heavy oil storage tank device and an oil storage method.
Background
With the continuous development of the processing technology of the heavy crude oil and the breakthrough of the direct coal liquefaction technology. The proportion of heavy crude oil processing enterprises and coal tar processing enterprises in chemical enterprises is increasing year by year, and the application technology of slurry bed processing technology is continuously approved and popularized. The production, storage and transportation technology of the oil phase medium with high solid content and slurry state faces a great challenge, and the storage mode of the traditional crude oil storage tank cannot meet the storage requirements of high-viscosity and high-solid content heavy oil (such as pyrolysis tar, coal oil slurry, solid-containing dirty oil, pressure reduction residue oil and the like). When the traditional heavy oil storage tank is used for storing high-viscosity and high-solid heavy oil, accidents such as deposition and blockage at the bottom of the storage tank, sudden boiling of a medium in the storage tank, tank roof collapse and the like are easy to occur;
specifically, the conventional crude oil storage tank has the following disadvantages: 1. the problem of storage tank deposition blockage: in order to prevent heavy oil from condensing in a traditional heavy oil storage tank during design, a steam heating coil is usually arranged at the bottom of the storage tank, the coil is arranged at the bottom of the storage tank, the arrangement mode is usually a snake shape, a heating medium is low-pressure steam, and a water delivery valve is arranged at an outlet of the heating coil to control the temperature of the medium in the tank to be 80-100 ℃. However, these technical measures are far from sufficient for heavy oil containing solid, such as: (the pyrolysis tar contains mineral salt dust, the coal oil slurry contains coal dust and additives, and different fractions in the solid dirty oil are mixed to form complex mixture with high solid content), the media can deposit a large amount of solid media at the bottom of the storage tank in the static storage process to cause serious blockage of the storage tank. As for the pyrolysis tar and the cooked oil coal slurry, the medium is a high-temperature reaction product, the generated oil and the incompletely converted coal powder have high associativity, and the generated oil can be hung on the wall of a storage tank or a heating coil to form lumps. For raw oil coal slurry and dirty oil containing solids, the affinity ratio between the oil medium and the solids is poor, the layering phenomenon can occur when the raw oil coal slurry and the dirty oil containing the solids are static, and a large amount of solids can be deposited at the bottommost part of the storage tank.
The large amount of solid media deposited on the bottom of the tank can have the following consequences: firstly, the heating coil at the bottom of the storage tank is covered by deposited solid accumulation, and the deposited solid layer is accumulated to closely prevent the heat of the medium of the heating coil from diffusing and transferring outwards, so that the temperature of the oil phase medium of the storage tank is reduced, the fluidity is poor, and the risk of agglomeration is caused. Secondly, a large amount of solid media in the storage tank are deposited at the bottom of the tank, so that an extraction port of the tank body is blocked, a large amount of heavy oil in the tank cannot be conveyed outwards, and an additional oil unloading mode is required to be adopted, so that serious safety risks are caused to a great extent.
2. The problem of cleaning sediments in the storage tank is as follows: the cleaning work of the deposited solids at the bottom of the tank body is very difficult when the high-viscosity solid-containing storage tank is overhauled. Firstly, the flowing heavy oil above the solid layer deposited at the bottom of the storage tank cannot be completely discharged when the storage tank is discharged, and the flowing heavy oil above the sediment needs to be manually bagged and cleaned before the sediment at the bottom of the storage tank is cleaned. Meanwhile, the solid accumulated at the bottom of the storage tank is not hard and blocky but is high-viscosity oil-containing solid, and when the coke is cleared by a high-pressure water gun, the viscous solid can be scattered by water and splashed everywhere, and the splashed heavy oil can be stuck to other positions. The high-viscosity oil-containing solid is difficult to mechanically clean coke, and no professional company can effectively clean the oil-containing solid coke at the bottom of the high-viscosity storage tank at present. The most effective cleaning of the deposited solid layer at the bottom of the high-viscosity solid heavy oil storage tank can only be realized by adopting the most original manual 'digging ground' mode for bagging operation. Secondly, the deposit at the bottom of the storage tank cannot be cleaned by mechanical block cutting, the heating coil is arranged at the bottom of the storage tank, the heating coil can be thoroughly damaged when mechanical cutting is adopted, and metal sparks can be generated when the mechanical cutting is adopted. Finally, the workload of carrying a large amount of sediments through a manhole of the storage tank is very large, so that the cleaning period is very long, even a part of the tank body needs to be carried in a mode of cutting a large hole at the lower part of the pipe wall, and the required economic cost is higher. Therefore, when the sediment at the bottom of the storage tank is cleaned, the cleaning difficulty is high, the period is long, the cost is high, and meanwhile, higher safety risk is faced.
3. The risk of roof fall in the storage tank oil receiving and purging processes is as follows: the conventional heavy oil storage tank is simple in design structure, a conveying pipeline is not required to be swept or inert gas is not required to be swept after heavy oil is transferred into the storage tank, however, steam or high-temperature inert gas is required to be used for sweeping the pipeline after solid heavy oil-containing medium is transferred into the storage tank, the high-temperature inert gas is used for sweeping the pipeline, the pipeline sweeping operation cost is too high, and the steam is usually used for sweeping the solid heavy oil-containing pipeline. However, when the steam is used for purging, the possibility that steam carries water or the amount of purged steam is too large and the like can occur during the heavy oil pipeline, so that a water phase medium is vaporized in the high-temperature heavy oil tank, oil injection is performed through a breather valve at the top of the storage tank, and a roof collapse accident of the storage tank can be caused in serious cases.
4. The bumping phenomenon of the medium in the storage tank is as follows: the existing transfer feeding pipe designed by the conventional heavy oil storage tank enters the storage tank from the upper part of the tank body, and a downcomer is arranged at the position close to the tank wall after the feeding pipe enters the tank and extends to the lower part of the tank body to prevent liquid from splashing. However, the same transportation mode is adopted for the storage tank of the high solid content heavy sump oil, and the bumping of the medium in the tank is easy to occur. The components of the solid heavy dirty oil are complicated because the solid heavy dirty oil is collected in the production plant due to abnormal production operation or during shutdown. Secondly, the delivery temperature of the solid dirty oil is usually higher, and the heavy oil pipeline fed into the storage tank must be subjected to steam purging, at this time, if the medium liquid level in the storage tank is in a higher operation state, after a high-temperature mixed medium or a mixed medium with water enters the bottom of the storage tank, part of condensed water or light oil components in the medium are gasified under the heat transfer effect of the heating steam coil pipe at the bottom of the storage tank, and the phenomenon of oil phase medium bumping can occur when a large amount of gas moves upwards at the bottom of the storage tank, so that oil injection and other accidents at the breather valve at the top of the tank are caused.
In summary, the conventional heavy oil storage tank is not suitable for storing the solid heavy oil, and the most serious of the solid heavy oil storage tank is that the solid heavy oil storage tank can cause the solid heavy oil to deposit on the bottom of the storage tank to generate a large amount of accumulated solid substances, and a large amount of oily auxiliary pollutants (oil-containing woven bags, waste oil barrels, a large amount of protective plastic cloths and the like) can be generated in the whole process of overhauling and cleaning the accumulated solid substances on the bottom of the storage tank. Meanwhile, a large amount of deposited oily solid waste which is cleaned up is difficult to treat harmlessly, which is the most serious environmental problem which must be faced at present. In order to solve the problem that solid heavy oil is stored in a storage tank to cause the accumulation of fixed substances at the bottom of the storage tank, although an external floating roof storage tank or a fixed roof storage tank is usually adopted in the conventional heavy oil storage at present, a heating coil is adopted in the tank body to heat a medium, so that the heavy oil is prevented from being condensed in the tank due to the fact that the temperature of the medium in the tank is reduced and the fluidity is poor. However, a large amount of sediments are still deposited at the bottom of the storage tank, and the maintenance cost is high and the cycle is long after the sediments inside the storage tank are deposited, so that the continuous long-cycle operation of the storage tank is seriously influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a solid heavy oil containing storage tank device and an oil storage method, which solve the problem that the continuous long-period operation of the storage tank is seriously influenced because the bottom of the conventional solid heavy oil containing storage tank is easy to deposit and block.
In order to achieve the purpose, the invention provides the following technical scheme: the storage tank device for the solid heavy oil comprises a heavy oil tank, wherein a main shaft is rotatably connected in an inner cavity of the heavy oil tank, a plurality of stirring blades are fixedly connected to the main shaft and are arranged in parallel with each other along the length direction of the main shaft, one end of the main shaft is connected with rotating equipment at the top of the heavy oil tank, and the other end of the main shaft is not in contact with the bottom of the heavy oil tank.
Further, the rotating equipment comprises a stirring motor, the stirring motor is arranged on the outer wall of the top of the heavy oil tank, an output shaft of the stirring motor is connected with a gearbox, and the gearbox is fixedly connected with the main shaft;
still overlap on the length direction along the main shaft and be equipped with the fixed cover of a plurality of, main shaft and fixed cover roll connection, a plurality of location branch of fixedly connected with on the fixed cover, location branch still with the inner wall connection of heavy oil tank, location branch is 120 with the lateral wall contained angle of heavy oil tank, the opening of the 120 contained angles of location branch and heavy oil tank is towards the inner wall vertical direction of heavy oil tank.
Furthermore, a plurality of fixed mounting brackets are arranged on the inner wall of the side edge of the heavy oil tank, a steam coil pipe is fixedly connected to the fixed mounting brackets, and the steam coil pipe is not in contact with the inner wall of the side edge of the heavy oil tank.
Further, a feed port is arranged on the side wall of the heavy oil tank and connected with a feed pipeline, and the distance between the inner wall of the bottom of the feed port and the inner wall of the top of the heavy oil tank is smaller than the distance between the liquid level of the top of the heavy oil tank and the inner wall of the top of the heavy oil tank;
the distance between the central line of the feed port and the inner wall of the top of the heavy oil tank is 60-70 cm.
Further, fixedly connected with ejection of compact strikes the reinforcing plate on the top inner wall of feed inlet, the reinforcing plate slope is arranged is strikeed in the ejection of compact, the ejection of compact strikes the export direction of the directional feed inlet of reinforcing plate.
Further, be equipped with expansion hose, feeding trip valve and row's material hand valve on the inlet pipe line, it is located the horizontal segment between expansion hose and the feeding trip valve to arrange the material hand valve, the feeding trip valve is located the vertical section of expansion hose outlet side.
Further, an oil unloading main opening is formed in the side wall of the heavy oil tank, an oil unloading main pipeline is connected to the oil unloading main opening, and an oil unloading hand valve and an oil unloading stop valve are sequentially arranged on the oil unloading main pipeline from an inlet of the oil unloading main pipeline to an outlet of the oil unloading main pipeline;
the side wall of the heavy oil tank is also provided with a spare oil unloading opening, the spare oil unloading opening is connected with a spare oil unloading pipeline, the spare oil unloading pipeline is also connected with an oil unloading main pipeline, the spare oil unloading pipeline is connected between an oil unloading hand valve and an oil unloading cut-off valve, and a hand valve before oil unloading and a hand valve after oil unloading are sequentially arranged on the spare oil unloading pipeline along the inlet of the spare oil unloading pipeline and the outlet of the spare oil unloading pipeline;
the distance between the center of the spare oil unloading opening and the center of the oil unloading main opening is 1.5m, and the distance between the oil unloading main opening and the inner wall of the bottom of the heavy oil tank is smaller than the distance between the spare oil unloading opening and the inner wall of the bottom of the heavy oil tank.
Further, an oil gas collecting port is formed in the top wall surface of the heavy oil tank, an oil gas collecting pipeline is connected to the oil gas collecting port and used for collecting water vapor and oil gas in the heavy oil tank, an outlet of the oil gas collecting pipeline is connected with an oil gas cooler, a circulating water feeding pipeline and a circulating water returning pipeline are connected to the oil gas cooler, the oil gas cooler is used for cooling the steam and oil gas to generate liquid and non-condensable gas, an outlet of the oil gas cooler is connected with an oil gas condensation separation storage tank, the oil gas condensation separation storage tank is used for separating the liquid and the non-condensable gas, a torch inlet is formed in the top of the oil gas condensation separation storage tank, the torch inlet is connected with a torch pipeline, and the bottom of the oil gas condensation separation storage tank is connected with a sewage external feeding pump.
Furthermore, the top of the oil-gas condensation separation storage tank is also connected with a production water pipeline, and the production water pipeline is used for inputting production water into the oil-gas condensation separation storage tank and establishing a water seal;
and the production water in the oil-gas condensation separation storage tank is used for plugging a cold oil-gas pipeline liquid outlet in the oil-gas condensation separation storage tank.
The invention also provides an oil storage method of the solid heavy oil-containing storage tank device, which comprises the following steps: after solid heavy oil is input into the heavy oil tank, the main shaft rotates, the stirring blades rotate along with the main shaft, acting force extending towards the top of the heavy oil tank is generated on solid heavy oil-containing media when the stirring blades rotate, the solid heavy oil positioned at the bottom of the heavy oil tank is lifted and rolled towards the top of the heavy oil tank, and when fixed particles in the solid heavy oil sink due to self weight, the fixed particles are forced to be lifted by the stirring blades, so that the solid heavy oil is lifted and circulated up and down in the heavy oil tank, and the oil storage process of the solid heavy oil tank is maintained.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention provides a solid heavy oil containing storage tank device, wherein a main shaft capable of rotating is arranged in an inner cavity of a heavy oil tank, a stirring blade is connected to the main shaft, and can rotate along with the main shaft, so that solid heavy oil in the inner cavity of the heavy oil tank can be stirred, an upward extending acting force is generated on a heavy oil medium when the blade on the main shaft rotates, the medium at the bottom of the heavy oil tank is lifted upwards and rolled, and solid particles are forced to be lifted by the stirring blade when sinking under the dead weight, so that the vertical lifting and the horizontal lifting are circularly operated, and the bottom deposition of the heavy oil tank is reduced. Finally, the rotation of the stirring blades can enhance the emulsification of the oil phase medium, avoid the layering of the mixed heavy oil when the mixed heavy oil is static, and simultaneously prevent the viscosity reduction of the heavy oil (the viscosity of the oil product reduces and the carrying capacity of the oil product reduces.) through practical application, the arrangement of the multilayer stirring blade stirring equipment can effectively reduce the deposition of solid particles at the bottom of the storage tank, and ensure the continuous long-period operation of the heavy oil tank.
Furthermore, a fixing sleeve is arranged on the main shaft and is supported in the inner cavity of the heavy oil tank through a positioning support rod, so that the deformation of the main shaft can be reduced, a certain support is provided for the main shaft, and the service life of the main shaft is ensured.
Further, the heating coil of conventional heavy oil storage tank arranges for snakelike bottom, can cause the heat transfer when appearing solid particle and deposit in the bottom inadequately, brings the inconvenience for overhauing clearance deposit simultaneously. And the coil pipe can not be horizontally arranged after the internal stirring facility is adopted, the heating coil pipe is a snakelike bent pipe and is arranged along the circumference of the storage tank, so that the arrangement can increase the vertical heat transfer gradient of oil products in the heavy oil tank, and meanwhile, convenience is provided for maintenance.
Furthermore, a feed inlet of the heavy oil tank is arranged above a cornice close to the top of the storage tank and the liquid level, the roof collapse risk and the bumping phenomenon in the prior art can be solved, and the action mechanism of the arrangement is that the surface temperature of the medium of the heavy oil tank is far lower than the temperature of the medium at the bottom of the medium of the heavy oil tank close to the heating coil. When the solid heavy oil containing feed pipeline carries out steam sweeping, part of condensate water carried by the solid heavy oil containing feed pipeline stays on the surface of a relatively low-temperature medium, because the medium temperature is not very high, the vaporization rate of the condensate water cannot be very high, water vapor after slow vaporization can continuously overflow from an oil gas collecting port at the top of the storage tank, the contact between the condensate water and a bottom high-temperature medium after the condensate water directly enters the bottom of the storage tank can be avoided, the storage tank heavy oil bumping or roof collapse accident can be avoided, the same is also true for mixed dirty oil mixed with part of light and heavy components, light oil can be rapidly gasified when the light oil directly contacts the heavy oil at the bottom of the storage tank, bubbles can vertically overflow from the bottom of the medium to the liquid level, a large amount of mist foam is carried with a large amount of oil mist and discharged from the oil gas collecting port at the top of the heavy oil tank, and large-area oil mist pollution of the storage tank area is caused.
Furthermore, the discharging impact reinforcing plate which is obliquely arranged on the feeding port can enable solid heavy oil to directly impact on the discharging impact reinforcing plate and then enter the heavy oil tank, and after the solid heavy oil impacts the discharging impact reinforcing plate, water-in-oil or oil-in-water in the solid heavy oil can be scattered, so that liquid water entering the solid heavy oil in the heavy oil tank can be distributed on the liquid level of the storage tank in a dispersing way, the vaporization effect of the liquid water is improved, the liquid water is discharged from an oil gas port at the top of the heavy oil tank, and lighter oil gas components in the solid heavy oil falling onto the liquid level.
Furthermore, the problem of pipeline blockage must be considered in the heavy oil conveying pipeline with high solid content, and the existing heavy oil storage tank feeding pipeline stop valve is usually installed at a horizontal pipeline at a lower position outside the storage tank, but the key of the problem of such arrangement is that when the feeding pipeline is briefly purged by steam, after the feeding stop valve is closed, the wall-hanging solid content in the feeding vertical pipe behind the feeding stop valve falls to the feeding vertical pipe behind the feeding stop valve, and the pipeline blockage phenomenon occurs. In order to solve the problems, the feeding cut-off valve is specially arranged on the vertical section of the outlet side of the expansion hose, the feeding cut-off valve is arranged on the feeding vertical pipe in a suspended mode, after the heavy oil tank receives the solid heavy oil, the heavy oil is blown into the tank by steam for a short time, then the feeding cut-off valve which is vertically arranged is closed, at the moment, the solid wall-hanging medium contained in the feeding pipe wall after the feeding cut-off valve can fall to the lowest position of the feeding pipeline vertical pipe by self weight, the blow-down valve at the horizontal low point is opened simultaneously, the medium falling by self weight in the pipeline is discharged into the special blow-down tank in a lump, and therefore the pipeline on the upper portion of the feeding cut-off valve cannot be blocked.
Furthermore, a spare oil discharge pipeline is arranged above the oil discharge main pipeline, and the spare oil discharge pipeline is arranged to prevent more oil above a settled layer in the heavy oil tank from being discharged by the spare oil discharge pipeline if the oil discharge main pipeline at the bottom of the heavy oil tank is blocked by the sediment and the oil cannot be discharged. If the heavy oil tank is not provided with an oil discharge pipeline for standby use but the oil discharge main pipeline at the bottom of the storage tank is blocked, oil above a settled layer in the heavy oil tank cannot be discharged outwards (without any oil discharge mode), and finally, a temporary storage tank oil discharge outlet can be additionally arranged only by adopting the heavy oil tank online drilling technology, but the online drilling technology is expensive in cost and has higher safety risk. Therefore, more choices can be provided when the main oil discharge pipeline is blocked through the spare oil discharge pipeline, and the spare oil discharge pipeline is respectively provided with the hand valve before oil discharge and the hand valve after oil discharge, so that solid heavy oil can be prevented from entering the spare oil discharge pipeline to block the spare oil discharge pipeline when the main oil discharge pipeline is discharged.
Further, the collection storage medium component that contains solid dirty oil storage tank is complicated, may contain the light oil component that the part was used for washing, and may contain the comdenstion water after the steam sweeps when parking, when light oil or comdenstion water got into high temperature heavy oil storage tank, a large amount of light oil and comdenstion water can be passed heat by high temperature medium, make partial light oil and comdenstion water vaporized, form malleation oil gas group above the liquid level in the heavy oil tank, a large amount of oil gas can be followed the breather valve of traditional design heavy oil tank and spilled over, cause oil storage tank district large tracts of land oil mist to pollute, and the storage tank suppresses the pressure accident. Therefore, the top of the solid heavy oil-containing storage tank designed by the invention is provided with the oil-gas collecting pipeline, oil gas is collected in the downstream container for condensation and separation, the separated non-condensable gas is combusted through the torch, and the separated liquid is conveyed to the outside through the sewage external conveying pump, so that the pollution of oil spilling at the top of the storage tank and pressure holding accidents can be effectively avoided.
Furthermore, the production water is introduced into the oil-gas condensation separation storage tank, the condensed oil-gas pipeline liquid discharge port can be sealed in a water manner, meanwhile, the incondensable gas is not influenced to be discharged into the torch pipeline, the incondensable gas in the torch pipeline can be prevented from flowing back to the upper space of the liquid level of the heavy oil tank, and the safe and reliable operation of the whole device is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a stirring blade provided on a main shaft according to the present invention;
FIG. 3 is a schematic top view of the structure of FIG. 2;
in the drawings: 1-heavy oil tank, 2-stirring motor, 3-feeding cut-off valve, 4-expansion hose, 5-feeding pipeline, 6-discharging hand valve, 7-hand valve before oil discharge, 8-spare oil discharge pipeline, 9-hand valve after oil discharge, 10-oil discharge cut-off valve, 11-main oil discharge pipeline, 12-oil discharge hand valve, 13-main shaft, 14-fixed sleeve, 15-positioning support rod, 16-stirring blade, 17-heating steam inlet pipeline, 18-heating steam outlet pipeline, 19-oil gas collecting pipeline, 20-oil gas cooler, 21-oil gas condensation separation storage tank, 22-sewage outward-feeding pump and 23-torch pipeline.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, the present invention provides a storage tank device containing solid heavy oil, which includes a heavy oil tank 1, a rotating device is disposed at the top of the heavy oil tank 1, in this embodiment, the rotating device is a stirring motor 2, an output shaft of the stirring motor 2 is connected with a gear box, the gear box is fixedly connected with one end of a main shaft 13, the main shaft 13 is rotatably connected in an inner cavity of the heavy oil tank 1, one end of the main shaft 13 is rotatably connected with the top of the heavy oil tank 1 through a bearing, and the other end of the main shaft 13 extends to the bottom of the heavy oil tank 1 and keeps a certain distance from the bottom of the heavy oil tank 1, as shown in fig. 2 and fig. 3, in this embodiment, the other end of the main shaft 13 is 70cm away from the bottom of the heavy oil tank 1, a plurality of stirring blades 16 are fixedly connected to the main shaft 13, and the plurality of stirring blades 16 are horizontally disposed along the length direction of the main shaft 13; in the present embodiment, the stirring vane 16 is a three-blade impeller, and the left and right side lines of the single impeller have a certain inclination angle, wherein the stirring vane 16 has two layers.
Preferably, a plurality of fixing sleeves 14 are further sleeved along the length direction of the main shaft 13, the main shaft 13 is in rolling connection with the fixing sleeves 14 through bearings, a plurality of positioning support rods 15 are fixedly connected to the fixing sleeves 14, the positioning support rods 15 are further connected with the inner wall of the heavy oil tank 1, the horizontal included angle between adjacent positioning support rods 15 and the wall of the heavy oil tank is 120 degrees, and the opening of the 120-degree included angle between the positioning support rods 15 and the wall of the heavy oil tank faces the vertical direction of the side wall of the heavy oil tank 1. In this embodiment, two fixing sleeves 14 are provided.
Specifically, when the heavy oil containing solid is stored in the heavy oil tank 1, the stirring blade device must be provided, and the stirring blade device is used for firstly preventing solid particles in the heavy oil from freely settling relatively to static, and when the solid particles are in the absence of external force, the solid particles can be deposited on the bottom of the heavy oil tank 1 under the action of gravity in a short time even if the initial position is above the liquid surface. The stirring blades 16 in the heavy oil tank 1 can keep the solid particles moving and reduce the free sedimentation effect. Secondly, when the stirring blades 16 rotate, acting force extending upwards is generated on the heavy oil medium, so that the medium at the bottom of the heavy oil tank 1 is lifted upwards and rolled, and when the solid particles sink due to self weight, the solid particles are forced to be lifted by the rotating impeller, so that the solid particles lift up and down circularly, and the bottom deposition of the heavy oil tank 1 is reduced. Finally, the rotation of the stirring blades 16 can enhance the emulsification of the oil phase medium, avoid the layering of the mixed heavy oil when the mixed heavy oil is static, and simultaneously prevent the viscosity reduction of the heavy oil (the viscosity of the oil product reduces the carrying capacity of the oil product), and the practical application proves that the deposition of solid particles at the bottom of the storage tank can be effectively reduced by arranging the multiple layers of stirring blades 16. The problem of sediment blockage of the heavy oil tank 1 and the problem of cleaning sediment in the heavy oil tank 1 can be solved through the design of the stirring blades 16.
In this embodiment, the heating coil of the conventional heavy oil storage tank is arranged in a serpentine bottom, which causes insufficient heat transfer when solid particles are deposited on the bottom, and brings inconvenience to the maintenance and cleaning of the deposits. And the coil pipe can not be horizontally arranged after the internal stirring facility is adopted, the heating coil pipe is arranged along the circumference of the storage tank in a serpentine bent pipe mode, so that the arrangement can increase the vertical heat transfer gradient of oil products in the heavy oil tank 1, and meanwhile, convenience is brought to maintenance. Specifically, a plurality of fixed mounting supports are arranged on the inner side wall of the heavy oil tank 1, a steam coil is fixedly connected to the fixed mounting supports and is not in contact with the inner side wall of the heavy oil tank, wherein an inlet of the steam coil is connected with a heating steam inlet pipeline 17, an outlet of the steam coil is connected with a heating steam outlet pipeline 18, and a continuous heat source is provided for the heavy oil tank 1 through the heating steam inlet and outlet pipelines.
In the embodiment, the feed inlet is arranged at the middle upper part (ensured above the liquid level) of the heavy oil tank 1, the action mechanism of the arrangement is that the surface temperature of the medium of the heavy oil tank is relatively lower than the temperature of the medium at the bottom of the heavy oil tank close to the heating coil, when part of condensed water carried by the feed pipeline containing the solid heavy oil during steam purging stays on the surface of the medium with relatively lower temperature, because the medium temperature is not very high, the vaporization rate of the condensed water is not very high, the water vapor after slow vaporization can continuously overflow from the oil gas collecting opening at the top of the storage tank, thus avoiding the occurrence of the accident that the condensed water is rapidly vaporized after directly entering the bottom of the storage tank and contacts with the high-temperature medium at the bottom, the same is true for part of dirty oil mixed with light and heavy components, and the rapid vaporization can also occur when the lighter oil directly contacts with the high-temperature heavy oil at the bottom of the storage tank, bubbles can vertically overflow from the bottom of the medium to the liquid level, a large amount of mist entrainment is caused, a large amount of oil mist is discharged from an oil gas collecting port at the top of the heavy oil tank, and large-area oil mist pollution in a storage tank area is caused.
Specifically, a feeding hole is formed in the side wall of the heavy oil tank 1 and connected with a feeding pipeline 5, and the distance between the inner wall of the bottom of the feeding hole and the inner wall of the top of the heavy oil tank 1 is smaller than the distance between the liquid level of the top of the heavy oil tank 1 and the inner wall of the top of the heavy oil tank 1; the distance between the central line of the feeding hole and the inner wall of the top of the heavy oil tank 1 is 60-70 cm, preferably, a discharging impact reinforcing plate is fixedly connected to the inner wall of the top of the feeding hole, the discharging impact reinforcing plate is obliquely arranged, and the discharging impact reinforcing plate points to the outlet direction of the feeding hole, so that solid heavy oil can impact on the discharging impact reinforcing plate before entering the heavy oil tank 1, oil-in-oil and oil-in-water in the solid heavy oil can be scattered, the solid heavy oil is gasified when entering the heavy oil tank 1, liquid water in the solid heavy oil can be scattered on the liquid level of the storage tank when entering the liquid level of the heavy oil tank 1, and the vaporization effect of the liquid water is improved.
In this embodiment, the feeding pipeline 5 is provided with an expansion hose 4, a feeding cut-off valve 3 and a discharge hand valve 6, the discharge hand valve 6 is located on the horizontal section between the expansion hose 4 and the feeding cut-off valve 3, and the feeding cut-off valve 3 is located on the vertical section at the outlet side of the expansion hose 4. The problem that a pipeline is blocked must be considered in a high solid heavy oil conveying pipeline, a feed pipeline stop valve of an existing heavy oil storage tank is usually installed at a horizontal pipeline at a lower position outside the storage tank, but the key of the problem of the arrangement is that when the feed pipeline is briefly purged by steam, after the feed stop valve 3 is closed, wall-hanging solid-containing objects in a feed vertical pipe behind the feed stop valve 3 fall to the feed vertical pipe behind the feed stop valve 3, and the pipeline blocking phenomenon occurs. In order to solve the problems, the feeding cut-off valve 3 is specially arranged on the vertical section of the outlet side of the expansion hose, the feeding cut-off valve 3 is arranged on the feeding vertical pipe in a suspended mode, after the heavy oil tank 1 receives the solid heavy oil, the heavy oil is blown into the tank by steam for a short time, then the vertically arranged feeding cut-off valve 3 is closed, at the moment, the solid wall hanging medium contained in the feeding pipe wall after the feeding cut-off valve 3 falls to the lowest position of the feeding pipeline vertical pipe through self weight, then the purging valve at the lower point of the feeding pipeline is opened to discharge the medium falling in the pipeline into the special purging tank, and therefore the pipeline on the upper portion of the feeding cut-off valve 3 cannot be blocked.
In the embodiment, an oil unloading main opening is formed in the side wall of the heavy oil tank 1, an oil unloading main pipeline 11 is connected to the oil unloading main opening, and an oil unloading hand valve 12 and an oil unloading cut-off valve 10 are sequentially arranged on the oil unloading main pipeline 11 from the inlet of the oil unloading main pipeline 11 to the outlet of the oil unloading main pipeline 11; a spare oil discharge opening is further formed in the side wall of the heavy oil tank 1, a spare oil discharge pipeline 8 is connected to the spare oil discharge opening, the spare oil discharge pipeline 8 is further connected with an oil discharge main pipeline 11, the spare oil discharge pipeline 8 is connected between an oil discharge hand valve 12 and an oil discharge cut-off valve 10, and an oil discharge front hand valve 7 and an oil discharge rear hand valve 9 are sequentially arranged on the spare oil discharge pipeline 8 along an inlet of the spare oil discharge pipeline 8 and an outlet of the spare oil discharge pipeline 8; the distance between the center of the spare oil discharge opening and the center of the main oil discharge opening is 1.5m, and the distance between the main oil discharge opening and the inner wall of the bottom of the heavy oil tank 1 is smaller than the distance between the spare oil discharge opening and the inner wall of the bottom of the heavy oil tank 1.
Specifically, the spare oil discharge pipeline 8 is arranged to prevent oil from being discharged more than oil deposited on the heavy oil tank 1 by adopting the spare oil discharge pipeline 8 if the main oil discharge pipeline 11 at the bottom of the heavy oil tank is blocked by the deposit and the oil cannot be discharged. If the heavy oil tank 1 is not provided with the spare oil discharge pipeline 8 but the oil discharge main pipeline 11 at the bottom of the storage tank is blocked, oil above a settled layer in the heavy oil tank 1 cannot be discharged outwards (without any oil discharge mode), and finally, a temporary storage tank oil discharge outlet can be additionally arranged by adopting the online drilling technology of the heavy oil tank 1, but the online drilling technology is expensive, and the safety risk is higher. Therefore, a spare oil unloading pipeline is required to be arranged for the high-viscosity and high-solid heavy oil storage tank.
In the embodiment, an oil gas collecting port is formed in the top wall surface of the heavy oil tank 1, a breather valve is not arranged on the oil gas collecting port, an oil gas collecting pipeline 19 is connected to the oil gas collecting port, the oil gas collecting pipeline 19 is used for collecting water vapor and oil gas in the heavy oil tank 1, an outlet of the oil gas collecting pipeline 19 is connected with an oil gas cooler 20, a circulating water feeding pipeline CWS and a circulating water returning pipeline CWR are connected to the oil gas cooler 20, the oil gas cooler 20 is used for cooling the steam and the oil gas to generate liquid and non-condensable gas, an outlet of the oil gas cooler 20 is connected with an oil gas condensation separation storage tank 21, the oil gas condensation separation storage tank 21 is used for separating the liquid and the non-condensable gas, a torch inlet is formed in the top of the oil gas condensation separation storage tank 21 and is connected with a torch pipeline 23, and the bottom of the oil gas condensation separation storage tank 21 is connected with a sewage outward-feeding pump 22. Preferably, the top of the oil-gas condensation separation storage tank 21 is further connected with a production water pipeline, and the production water pipeline is used for inputting production water into the oil-gas condensation separation storage tank 21; the produced water in the oil-gas condensation separation storage tank 21 plugs the cold oil-gas pipeline liquid outlet.
Specifically, it is complicated to contain the collection storage medium component of solid dirty oil storage tank, may contain the light oil component that the part is used for washing, and may contain the comdenstion water after the steam sweeps when parking, when light oil or comdenstion water get into high temperature heavy oil storage tank, a large amount of light oil and comdenstion water can be passed heat by high temperature medium, make partial light oil and comdenstion water by the vaporization, form malleation oil pocket above the liquid level in heavy oil tank 1, a large amount of oil gas can be followed the oil gas collecting port of traditional design heavy oil tank 1 and is spilled over, cause oil storage tank district large tracts of land oil mist to pollute, and the storage tank suppresses the pressure accident. So contain the top of solid heavy oil storage tank at novel design and set up oil gas collection pipeline 19, collect oil gas and carry out condensation and separation in the container, make the noncondensable gas of isolating burn through the torch, the liquid of separation is carried to the external world through sewage delivery pump outward, can effectively avoid storage tank top oil spilling to pollute like this and suppress the pressure accident.
In another embodiment of the present invention, there is provided a method for storing oil in a storage tank containing heavy oil, comprising the steps of: after the solid heavy oil is input into the heavy oil tank 1, the main shaft 13 rotates, the plurality of stirring blades 16 rotate along with the main shaft 13, acting force which extends towards the top of the heavy oil tank 1 is generated on the solid heavy oil-containing medium when the plurality of stirring blades 16 rotate, the solid heavy oil positioned at the bottom of the heavy oil tank 1 is lifted and rolled towards the top of the heavy oil tank 1, and when fixed particles in the solid heavy oil sink due to self weight, the fixed particles are forced to be lifted by the stirring blades, so that the solid heavy oil is lifted and lowered in the heavy oil tank 1 to circularly run, and the oil storage process of the solid heavy oil-containing storage tank is maintained.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The storage tank device for the solid heavy oil is characterized by comprising a heavy oil tank (1), wherein a main shaft (13) is rotatably connected in an inner cavity of the heavy oil tank (1), a plurality of stirring blades (16) are fixedly connected to the main shaft (13), the stirring blades (16) are arranged in parallel with each other along the length direction of the main shaft (13), one end of the main shaft (13) is connected with a rotating device at the top of the heavy oil tank (1), and the other end of the main shaft (13) is not in contact with the bottom of the heavy oil tank (1).
2. The storage tank device for the heavy oil containing the solid according to claim 1, wherein the rotating device comprises a stirring motor (2), the stirring motor (2) is arranged on the outer wall of the top of the heavy oil tank (1), an output shaft of the stirring motor (2) is connected with a gearbox, and the gearbox is fixedly connected with the main shaft (13);
still overlap on the length direction of main shaft (13) and be equipped with the fixed cover of a plurality of (14), main shaft (13) and fixed cover (14) roll connection, a plurality of location branch (15) of fixedly connected with on fixed cover (14), location branch (15) still with the inner wall connection of heavy oil tank (1), location branch (15) are 120 with the lateral wall contained angle of heavy oil tank (1), the opening of the 120 contained angles of location branch (15) and heavy oil tank (1) is towards the inner wall vertical direction of heavy oil tank (1).
3. The storage tank device for heavy oil containing solid according to claim 1, wherein a plurality of fixed mounting brackets are arranged on the inner side wall of the heavy oil tank (1), a steam coil is fixedly connected to the fixed mounting brackets, and the steam coil is not in contact with the inner side wall of the heavy oil tank (1).
4. The storage tank device for the heavy oil containing solid according to claim 1, wherein a feed port is arranged on the side wall of the heavy oil tank (1), the feed port is connected with a feed pipeline (5), and the distance between the bottom inner wall of the feed port and the top inner wall of the heavy oil tank (1) is smaller than the distance between the top liquid level of the heavy oil tank (1) and the top inner wall of the heavy oil tank (1);
the distance between the central line of the feed port and the inner wall of the top of the heavy oil tank (1) is 60-70 cm.
5. The storage tank device for heavy oil containing solid of claim 4, wherein a discharging impact reinforcement plate is fixedly connected to the inner wall of the top of the feeding port, the discharging impact reinforcement plate is obliquely arranged, and the discharging impact reinforcement plate points to the outlet direction of the feeding port.
6. The storage tank device for heavy oil containing solid content according to claim 4, wherein the feeding pipeline (5) is provided with an expansion hose (4), a feeding cut-off valve (3) and a discharge hand valve (6), the discharge hand valve (6) is arranged on a horizontal section between the expansion hose (4) and the feeding cut-off valve (3), and the feeding cut-off valve (3) is arranged on a vertical section at the outlet side of the expansion hose (4).
7. The storage tank device for heavy oil containing solid according to claim 1, wherein the sidewall of the heavy oil tank (1) is provided with a main oil discharge opening, the main oil discharge opening is connected with a main oil discharge pipe (11), and an oil discharge hand valve (12) and an oil discharge cut-off valve (10) are sequentially arranged on the main oil discharge pipe (11) from an inlet of the main oil discharge pipe (11) to an outlet of the main oil discharge pipe (11);
a spare oil discharge opening is further formed in the side wall of the heavy oil tank (1), a spare oil discharge pipeline (8) is connected to the spare oil discharge opening, the spare oil discharge pipeline (8) is further connected with an oil discharge main pipeline (11), the spare oil discharge pipeline (8) is connected between an oil discharge hand valve (12) and an oil discharge stop valve (10), and an oil discharge front hand valve (7) and an oil discharge rear hand valve (9) are sequentially arranged on the spare oil discharge pipeline (8) along the inlet of the spare oil discharge pipeline (8) and the outlet of the spare oil discharge pipeline (8);
the distance between the center of the spare oil unloading opening and the center of the main oil unloading opening is 1.5m, and the distance between the main oil unloading opening and the inner wall of the bottom of the heavy oil tank (1) is smaller than the distance between the spare oil unloading opening and the inner wall of the bottom of the heavy oil tank (1).
8. The storage tank device containing the solid heavy oil according to claim 1, wherein an oil gas collecting port is formed in the top wall surface of the heavy oil tank (1), an oil gas collecting pipeline (19) is connected to the oil gas collecting port, the oil gas collecting pipeline (19) is used for collecting water vapor and oil gas in the heavy oil tank (1), an outlet of the oil gas collecting pipeline (19) is connected with an oil gas cooler (20), a circulating water feeding pipeline and a circulating water returning pipeline are connected to the oil gas cooler (20), the oil gas cooler (20) is used for cooling the steam and the oil gas to generate liquid and non-condensable gas, an outlet of the oil gas cooler (20) is connected with an oil gas condensation separation storage tank (21), the oil gas condensation separation storage tank (21) is used for separating the liquid and the non-condensable gas, a torch inlet is formed in the top of the oil gas condensation separation storage tank (21), and a torch pipeline (23) is connected to the torch inlet, the bottom of the oil-gas condensation separation storage tank (21) is connected with a sewage delivery pump (22).
9. The storage tank device for heavy oil containing solid according to claim 8, wherein the top of the oil-gas condensation separation storage tank (21) is further connected with a production water line, and the production water line is used for inputting production water into the oil-gas condensation separation storage tank (21) to establish water seal;
and the produced water in the oil-gas condensation separation storage tank (21) is used for plugging a cold oil-gas pipeline liquid outlet in the oil-gas condensation separation storage tank (21).
10. The method for storing oil in the storage tank facility containing the heavy oil as claimed in any one of claims 1 to 9, comprising the steps of: after solid heavy oil is input into the heavy oil tank (1), the main shaft (13) rotates, the plurality of stirring blades (16) rotate along with the main shaft (13), acting force which extends towards the top of the heavy oil tank (1) is generated on solid heavy oil-containing media when the plurality of stirring blades (16) rotate, the solid heavy oil positioned at the bottom of the heavy oil tank (1) is lifted and rolled towards the top of the heavy oil tank (1), and when fixed particles in the solid heavy oil are forcedly lifted by the stirring blades (16) when sinking under self weight, the solid heavy oil is enabled to lift up and down in the heavy oil tank (1) to circularly run, and the oil storage process of the solid heavy oil tank (1) is maintained.
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| CN202110998622.8A CN113546556A (en) | 2021-08-27 | 2021-08-27 | Solid heavy oil-containing storage tank device and oil storage method |
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| CN202110998622.8A CN113546556A (en) | 2021-08-27 | 2021-08-27 | Solid heavy oil-containing storage tank device and oil storage method |
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