Atmospheric and vacuum distillation unit for processing crude oil

Abstract

The utility model discloses an atmospheric and vacuum distillation unit for processing crude oil. The atmospheric and vacuum distillation unit at least comprises a crude oil component tank; an inlet of the mixer is connected to an outlet of the crude oil component tank; an inlet of the crude oil blending storage tank is connected to an outlet of the mixer; an inlet of the middle crude oil tank area is connected to an outlet of the crude oil blending storage tank; an inlet of the electric desalting equipment is connected to an outlet of the middle crude oil tank area; an inlet of the atmospheric and vacuum equipment is connected to an outlet of the electric desalting equipment; the first demulsifier filling pipeline is arranged at an inlet of the mixer; and the second demulsifier filling pipeline is arranged at an inlet of the electric desalting equipment. According to the atmospheric and vacuum distillation device provided by the utility model, the dehydration and desalination depth of crude oil can be increased, stable operation of the atmospheric and vacuum distillation device and downstream devices thereof is maintained, and the service lives of the atmospheric and vacuum distillation device and the downstream devices thereof are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to a constant pressure reduction device for processing crude oil. Background Art

[0002] Crude oil has a complex composition, which contains a considerable amount of impurities such as water, inorganic salts and organic salts. The presence of water and salts not only affects the smooth operation and energy consumption of the atmospheric and vacuum devices, but also corrodes the equipment and affects the production and operation of the downstream devices of the atmospheric and vacuum devices. Therefore, in the current atmospheric and vacuum devices, there are problems such as incomplete removal of water and salt from crude oil, and unstable production and operation of the atmospheric and vacuum devices and their downstream devices. Utility Model Content

[0003] The utility model aims to provide a constant pressure reduction device for processing crude oil, which can increase the depth of crude oil dehydration and desalination, maintain the stable operation of the constant pressure reduction device and its downstream devices, reduce the corrosion of salt in the crude oil to the equipment, and extend the service life of the constant pressure reduction device and its downstream devices.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model is implemented through the following technical solutions.

[0005] The utility model provides a normal and low pressure device for processing crude oil, which at least comprises:

[0006] Crude oil component tanks;

[0007] a mixer, the inlet of the mixer being connected to the outlet of the crude oil component tank;

[0008] a crude oil blending storage tank, wherein the inlet of the crude oil blending storage tank is connected to the outlet of the mixer;

[0009] An intermediate crude oil tank farm, wherein the inlet of the intermediate crude oil tank farm is connected to the outlet of the crude oil blending storage tank;

[0010] an electric desalter, wherein the inlet of the electric desalter is connected to the outlet of the intermediate crude oil tank farm;

[0011] A constant pressure reduction device, wherein the inlet of the constant pressure reduction device is connected to the outlet of the electric desalination device;

[0012] a first demulsifier filling pipeline, arranged at the inlet of the mixer; and

[0013] The second demulsifier filling pipeline is arranged at the inlet of the electric desalination equipment.

[0014] In an embodiment of the present invention, the demulsifier first filling pipeline comprises a filling pump, and the demulsifier is input into the inlet of the filling pump.

[0015] In an embodiment of the present invention, the demulsifier first filling pipeline comprises a demulsifier tank, and the inlet of the demulsifier tank is connected to the outlet of the filling pump.

[0016] In an embodiment of the present invention, the first demulsifier filling pipeline includes at least one filling branch line, the inlet of the filling branch line is connected to the outlet of the demulsifier tank, and the outlet of the filling branch line is connected to the inlet of the mixer.

[0017] In an embodiment of the present invention, the demulsifier first filling pipeline includes a calibration column, and the calibration column is arranged between the demulsifier tank and the filling branch line.

[0018] In an embodiment of the present invention, when there are multiple filling branch lines, the multiple filling branch lines are connected in parallel, and the multiple filling branch lines are arranged on a side of the calibration column away from the demulsifier tank.

[0019] In one embodiment of the utility model, the demulsifier first filling pipeline includes a filling pump, and the filling pump is arranged on the filling branch line. When there are multiple filling branch lines, at least one filling pump is arranged on each filling branch line.

[0020] In one embodiment of the utility model, a first filter and a blending pump are arranged between the crude oil component tank and the mixer, and a blending pump bypass line is also arranged at the inlet of the first filter and the outlet of the blending pump. The first filter and the blending pump are connected in series and are arranged in parallel with the blending pump bypass line.

[0021] In one embodiment of the utility model, a second filter and a transfer pump are arranged between the crude oil blending storage tank and the intermediate crude oil tank area, and a transfer pump bypass line is also arranged at the inlet of the second filter and the outlet of the transfer pump. The second filter and the transfer pump are connected in series and are arranged in parallel with the transfer pump bypass line.

[0022] In one embodiment of the utility model, a third filter and a feed pump are arranged between the intermediate crude oil tank area and the electric desalter, and a feed pump bypass line is also arranged at the inlet of the third filter and the outlet of the feed pump. The third filter and the feed pump are connected in series and are arranged in parallel with the feed pump bypass line.

[0023] In summary, the utility model proposes a vacuum device for processing crude oil, which can increase the depth of crude oil dehydration and desalination, fully reduce the water and salt content in crude oil, and maintain the stable operation of the vacuum device and its downstream devices. Moreover, the vacuum device provided by the utility model can reduce the corrosion of salt in crude oil to equipment and extend the service life of the device.

[0024] Of course, any method of implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 The present invention is a schematic structural diagram of a crude oil processing device according to an embodiment of the present invention.

[0027] Marking Description:

[0028] 11. Crude oil component tank; 12. First filter; 13. Blending pump; 14. Blending pump main line; 15. Blending pump auxiliary line; 16. Reflux main line; 17. Reflux auxiliary line; 18. Drain valve; 19. Blending flow meter; 20. Blending tank inlet line; 21. Mixer; 22. Mixer auxiliary line; 23. Demulsifier first filling pipeline; 231. Filling pump; 232. Demulsifier tank; 2321. Manhole; 2322. Flame arrester; 2323. Liquid level measuring instrument; 233. Calibration column; 234 , the first filling branch line; 2341, the first filling pump; 235, the second filling branch line; 2351, the second filling pump; 236, the pressure measuring instrument; 24, the crude oil blending storage tank; 25, the transfer pump main line; 26, the second filter; 27, the transfer pump; 28, the transfer pump branch line; 29, the intermediate crude oil tank area; 30, the feed pump main line; 31, the third filter; 32, the feed pump; 33, the feed pump branch line; 34, the electric desalting equipment; 35, the demulsifier second filling pipeline; 36, the constant pressure reduction equipment. DETAILED DESCRIPTION

[0029] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations. The details in the present invention can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0031] In the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first" and "second" appear, they are only used for description and distinction purposes, and cannot be understood as indicating or implying relative importance.

[0032] In the atmospheric and vacuum device, the impure water in the crude oil needs to be heated and gasified to be removed in order to obtain a product of qualified purity. When the water is heated and gasified, it needs to absorb a large amount of heat energy, which increases the energy consumption of the atmospheric and vacuum device, and also increases the gas phase load of the atmospheric and vacuum device, causing fluctuations in the operation of the atmospheric and vacuum device. Moreover, the salt in the crude oil will corrode the equipment in the atmospheric and vacuum device, shortening the service life of the atmospheric and vacuum device. The atmospheric and vacuum device for processing crude oil provided by the utility model can increase the contact time between the demulsifier and the crude oil, increase the depth of crude oil dehydration and desalination, fully reduce the water and salt content in the crude oil, and is conducive to reducing the operating energy consumption of the atmospheric and vacuum device, maintaining the stable operation of the atmospheric and vacuum device and its downstream devices, and extending the service life of the atmospheric and vacuum device and its downstream devices.

[0033] See also Figure 1As shown, the utility model provides a normal and low pressure device for processing crude oil, for example, including a crude oil component tank 11, a mixer 21, a crude oil blending storage tank 24, an intermediate crude oil tank area 29, an electric desalter 34, a normal and low pressure device 36, a first demulsifier filling pipeline 23 and a second demulsifier filling pipeline 35, etc. Among them, the crude oil component tank 11, the mixer 21, the crude oil blending storage tank 24, the intermediate crude oil tank area 29, the electric desalter 34 and the normal and low pressure device 36 are connected in sequence, the first demulsifier filling pipeline 23 is arranged at the inlet of the mixer 21, and the second demulsifier filling pipeline 35 is arranged at the inlet of the electric desalter 34. The atmospheric and vacuum device for processing crude oil provided by the utility model can increase the contact time between crude oil and demulsifier through the first demulsifier filling pipeline 23, the mixer 21, the crude oil blending storage tank 24 and the intermediate crude oil tank area 29, so that the water content and salt in the crude oil can be fully settled and removed in the crude oil blending storage tank 24 and the intermediate crude oil tank area 29, thereby reducing the water content and salt content in the crude oil, reducing the operating energy consumption of the atmospheric and vacuum device 36, maintaining the stable operation of the atmospheric and vacuum device 36 and its downstream devices, and extending the service life of the atmospheric and vacuum device 36 and its downstream devices.

[0034] See also Figure 1 As shown, in one embodiment of the utility model, the raw material of the atmospheric and vacuum device is stored in the crude oil component tank 11. Among them, the crude oil component tank 11, for example, contains at least one of high-quality crude oil, medium-quality crude oil and low-quality crude oil. In this embodiment, the crude oil component tank 11, for example, contains high-quality crude oil, medium-quality crude oil and low-quality crude oil at the same time. By adding low-quality crude oil to high-quality crude oil and medium-quality crude oil and mixing them, and then using the mixed crude oil as the raw material of the atmospheric and vacuum device, the utilization rate of the low-quality crude oil can be improved. However, if the proportion of low-quality crude oil in the mixed crude oil is too high, the quality of the mixed crude oil will deteriorate, thereby affecting the operation of the atmospheric and vacuum device and the purity of the product. At this time, the mixed crude oil will no longer be suitable as a raw material for the atmospheric and vacuum device.

[0035] See also Figure 1 As shown, in one embodiment of the utility model, the inlet of the mixer 21 is connected to the outlet of the crude oil component tank 11. The mixer 21 is, for example, a static mixer or a dynamic mixer. The mixed crude oil in the crude oil component tank 11 enters the mixer 21, and the mixed crude oil is mixed to obtain a uniform mixed crude oil, so as to improve the utilization rate of inferior crude oil in the mixed crude oil. The inlet and outlet of the mixer 21 are each provided with at least one valve, for example, to control whether the crude oil flows into the mixer 21. In this embodiment, the inlet and outlet of the mixer 21 are each provided with a valve, and the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve, a manual valve, etc.

[0036] See also Figure 1As shown, in one embodiment of the utility model, a blending pump 13 is provided between the mixer 21 and the crude oil component tank 11 to increase the pressure of the crude oil at the outlet of the crude oil component tank 11 so that the crude oil can flow smoothly into the mixer 21. In this embodiment, the blending pump 13 is, for example, a centrifugal pump, an axial flow pump, a diaphragm pump or a reciprocating pump, and the flow rate of the blending pump 13 is, for example, 800-1500m 3 / h, the head of the blending pump 13 is, for example, 40-80m.

[0037] See also Figure 1 As shown, in one embodiment of the utility model, the outlet of the crude oil component tank 11 and the inlet of the blending pump 13 are connected by setting a blending pump main line 14 to connect the crude oil component tank 11 and the blending pump 13. Among them, at least one valve is set on the blending pump main line 14, for example, to control whether the crude oil is connected between the crude oil component tank 11 and the blending pump 13. In this embodiment, four valves are set on the blending pump main line 14, for example, and the valves include at least one of an electric valve, a solenoid valve, a pneumatic valve, and a manual valve. If only one valve is set on the blending pump main line 14, when the valve fails, it is impossible to control whether the crude oil is connected between the crude oil component tank 11 and the blending pump 13 through the valve. Therefore, by setting multiple valves, when one valve fails, other valves can be used to control whether the crude oil is connected between the crude oil component tank 11 and the blending pump 13, so as to improve the operational flexibility of the atmospheric and vacuum device.

[0038] See also Figure 1 As shown, in one embodiment of the utility model, a first filter 12 is further provided on the blending pump main line 14, and the first filter 12 filters the crude oil at the outlet of the crude oil component tank 11. By providing the first filter 12, mechanical impurities in the crude oil at the outlet of the crude oil component tank 11 can be filtered out, so as to avoid mechanical impurities clogging subsequent pipelines and equipment, and ensure the smooth operation of the atmospheric and vacuum device.

[0039] See also Figure 1 As shown, in one embodiment of the utility model, the atmospheric and vacuum device further includes a blending pump auxiliary line 15, and the blending pump auxiliary line 15 is connected to the inlet of the first filter 12 and the outlet of the blending pump 13. Among them, the blending pump 13 and the first filter 12 are connected in series and connected in parallel with the blending pump auxiliary line 15. When the blending pump 13 fails and cannot transport crude oil, the blending pump auxiliary line 15 is set as a backup, so that the crude oil in the crude oil component tank 11 can continue to be transported to subsequent equipment to increase the stability of the atmospheric and vacuum device operation. Among them, at least one valve is set on the blending pump auxiliary line 15, for example, to control the circulation of crude oil in the blending pump auxiliary line 15. In this embodiment, a valve is set on the blending pump auxiliary line 15, for example, the valve is an electric valve, a solenoid valve, a pneumatic valve, a manual valve, etc.

[0040] See also Figure 1As shown, in one embodiment of the utility model, the blending tank inlet line 20 is provided to connect the outlet of the blending pump 13 and the inlet of the mixer 21, so as to connect the blending pump 13 and the mixer 21. Among them, at least one valve is provided on the blending tank inlet line 20, for example, to control the circulation of crude oil in the blending tank inlet line 20. In this embodiment, four valves are provided on the blending tank inlet line 20, for example. Among them, one valve is provided on the side of the blending tank inlet line 20 close to the blending pump 13, and the valve is, for example, a check valve, to prevent the crude oil in the blending tank inlet line 20 from flowing back to the blending pump 13, so as to protect the blending pump 13. The remaining three valves are provided on the side of the check valve away from the blending pump 13, and by providing multiple valves, when one valve fails, the circulation of crude oil in the blending tank inlet line 20 can be controlled by other valves, thereby improving the operational flexibility of the atmospheric and vacuum pressure reducing device. In this embodiment, the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve, and a manual valve.

[0041] See also Figure 1 As shown, in one embodiment of the utility model, a blending flowmeter 19 is further provided on the blending inlet tank line 20 to adjust the flow rate of the crude oil flowing in the blending inlet tank line 20. In this embodiment, the blending flowmeter 19 is, for example, an orifice flowmeter, an electromagnetic flowmeter, a turbine flowmeter, a venturi flowmeter or a rotor flowmeter.

[0042] See also Figure 1 As shown, in one embodiment of the utility model, the atmospheric and vacuum device further includes a reflux main line 16, which connects the outlet of the blending pump auxiliary line 15 and the crude oil component tank 11. Since the blending pump 13 has a minimum restricted flow rate, if the flow rate demand of the subsequent atmospheric and vacuum equipment 36 for crude oil is still less than the minimum restricted flow rate of the blending pump 13, by setting the reflux main line 16, the blending pump 13 can be stably operated at the minimum restricted flow rate, and the reflux main line 16 refluxes part of the crude oil at the outlet of the blending pump 13 to the crude oil component tank 11, and sends the remaining crude oil that meets the flow rate demand of the atmospheric and vacuum equipment 36 to the subsequent atmospheric and vacuum equipment 36, thereby protecting the blending pump 13. In this embodiment, at least one valve is provided on the reflux main line 16, for example, to control whether the crude oil flows in the reflux main line 16. In this embodiment, six valves are provided on the reflux main line 16, such as electric valves, solenoid valves, pneumatic valves and manual valves. By providing multiple valves, when one valve fails, the circulation of crude oil in the reflux main line 16 can be controlled by other valves, thereby improving the operational flexibility of the atmospheric and vacuum device. Moreover, in this embodiment, the drain valve 18 is provided between two valves of the reflux main line 16. When the atmospheric and vacuum device is shut down for maintenance, the crude oil in the reflux main line 16 can be discharged through the drain valve 18, so as to facilitate the maintenance of valves and pipelines.

[0043] See also Figure 1As shown, in one embodiment of the utility model, the atmospheric and vacuum device further includes a reflux secondary line 17, and the reflux secondary line 17 connects any two points on the reflux main line 16. In this embodiment, the reflux secondary line 17 and the reflux main line 16 have two connections. When the reflux main line 16 between the two connections cannot flow smoothly, by setting the reflux secondary line 17 as a backup for the reflux main line 16, the crude oil at the outlet of the blending pump 13 can continue to flow back to the crude oil component tank 11, so as to improve the operating stability of the atmospheric and vacuum device. Among them, at least one valve is set on the reflux secondary line 17, for example, to control whether the crude oil flows in the reflux secondary line 17. In this embodiment, a valve is set on the reflux secondary line 17, and the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve or a manual valve.

[0044] See also Figure 1 As shown, in one embodiment of the present utility model, the atmospheric and vacuum device further includes a mixer sub-line 22, and the mixer sub-line 22 connects the inlet and outlet of the mixer 21. If the mixer 21, the valve at the outlet of the mixer 21, or the valve at the inlet of the mixer 21 fails, resulting in the crude oil before and after the mixer 21 not being able to flow smoothly in the pipeline to the subsequent crude oil blending storage tank 24, by setting the mixer sub-line 22 as a backup, the crude oil before the inlet of the mixer 21 can continue to be transported to the outlet of the mixer 21, thereby improving the operating stability of the atmospheric and vacuum device.

[0045] See also Figure 1 As shown, in one embodiment of the utility model, a first demulsifier filling pipeline 23 is provided at the inlet of the mixer 21. In this embodiment, the first demulsifier filling pipeline 23 is connected to the blending tank inlet line 20 at the inlet of the mixer 21. Among them, the demulsifier includes, for example, at least one of a polymer demulsifier, a surfactant demulsifier, an electrolyte demulsifier, a biological demulsifier, and a reverse demulsifier. By providing the first demulsifier filling pipeline 23 at the inlet of the mixer 21, the contact time between the demulsifier and the crude oil can be increased, and the depth of dehydration and desalination in the crude oil can be increased. In this embodiment, the first demulsifier filling pipeline 23 includes, for example, a filling pump 231, a demulsifier tank 232, a calibration column 233, a filling branch line, and a pressure measuring instrument 236.

[0046] See also Figure 1As shown, in one embodiment of the utility model, the inlet of the filling pump 231 inputs the demulsifier, and the outlet of the filling pump 231 is connected to the demulsifier tank 232. By setting the filling pump 231, the pressure of the demulsifier is increased, so that the demulsifier can be smoothly added to the demulsifier tank 232. Among them, the filling pump 231 is, for example, a centrifugal pump, an axial flow pump, a diaphragm pump or a reciprocating pump, and is also, for example, a pneumatic diaphragm pump. Among them, at least one valve is set between the filling pump 231 and the demulsifier tank 232, so as to control the flow of the demulsifier between the filling pump 231 and the demulsifier tank 232. In this embodiment, the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve or a manual valve.

[0047] See also Figure 1 As shown, in one embodiment of the utility model, the inlet of the demulsifier tank 232 is connected to the outlet of the filling pump 231 for storing the demulsifier. In this embodiment, the demulsifier tank 232 includes, for example, a manhole 2321, a flame arrester 2322, and a liquid level measuring instrument 2323. Among them, the manhole 2321 is, for example, arranged on the demulsifier tank 232. In this embodiment, the manhole 2321 is, for example, arranged on the tank top of the demulsifier tank 232. Through the manhole 2321, the operator can smoothly enter the demulsifier tank 232 for maintenance work. In this embodiment, the flame arrester 2322 is, for example, arranged on the demulsifier tank 232. Since the demulsifier is a hazardous chemical, the flame arrester 2322 is arranged to prevent the heat and flame outside the demulsifier tank 232 from propagating to the inside of the demulsifier tank 232, thereby improving the safety of the constant pressure reduction device. Among them, the flame arrester 2322 is, for example, a flame arrester of an anti-explosion type or a flame arrester of an anti-detonation type. In this embodiment, the liquid level measuring instrument 2323 is, for example, disposed on the demulsifier tank 232, and is used to measure the liquid level of the demulsifier stored in the demulsifier tank 232, so as to remind the operator to replenish the demulsifier in time. The liquid level measuring instrument 2323, for example, includes at least one of an on-site liquid level transmitter and an on-site display glass plate type liquid level gauge. In this embodiment, the liquid level measuring instrument 2323, for example, includes both an on-site liquid level transmitter and an on-site display glass plate type liquid level gauge.

[0048] See also Figure 1As shown, in one embodiment of the utility model, the inlet of the filling branch line is connected to the outlet of the demulsifier tank 232, and the outlet of the filling branch line is connected to the inlet of the mixer 21. Among them, there is at least one filling branch line, for example, and when there are multiple filling branches, the multiple filling branches are connected in parallel. In this embodiment, there are two filling branches, for example, the two filling branches include a first filling branch line 234 and a second filling branch line 235, etc. The first filling branch line 234 and the second filling branch line 235 are arranged in parallel, and one end of the first filling branch line 234 and the second filling branch line 235 in parallel is connected to the outlet of the demulsifier tank 232, and the other end of the parallel connection is connected to the inlet of the mixer 21. By setting two filling branches, when one filling branch line fails and cannot transmit the demulsifier, the demulsifier can continue to be transmitted through the other filling branch line, thereby improving the operating stability of the constant pressure reduction device. Moreover, by using two filling branches, the efficiency of injecting demulsifier into crude oil can be improved.

[0049] See also Figure 1 As shown, in one embodiment of the utility model, each filling branch line includes, for example, a filling pump, a valve, or a pressure gauge, and each filling branch line may be the same or different. In this embodiment, each filling branch line is, for example, the same, so when there are multiple filling branches, the filling pump, valve, or pressure gauge are respectively arranged on multiple filling branches. In this embodiment, the first filling branch line 234 and the second filling branch line 235 are exactly the same, so the filling branch line is described by taking the first filling branch line 234 as an example. In this embodiment, the first filling branch line 234 includes, for example, a first filling pump 2341, a valve, and a pressure gauge. Among them, the first filling pump 2341 is, for example, arranged on the first filling branch line 234 to increase the demulsifier pressure at the outlet of the demulsifier tank 232 so that the demulsifier can flow smoothly into the mixer 21. In this embodiment, the first filling pump 2341 is, for example, a centrifugal pump, an axial flow pump, a diaphragm pump, or a reciprocating pump.

[0050] See also Figure 1 As shown, in one embodiment of the utility model, at least one valve is provided on the first filling branch line 234, for example, to control the circulation of the demulsifier in the first filling branch line 234. In this embodiment, there are three valves, for example, and the valves are electric valves, solenoid valves, pneumatic valves or manual valves. Among them, one valve is provided at the inlet of the first filling pump 2341, for example, and two valves are provided at the outlet of the first filling pump 2341, for example. Among them, one valve located at the outlet of the first filling pump 2341 is, for example, a check valve, to prevent the demulsifier in the outlet of the first filling pump 2341 from flowing back to the first filling pump 2341, thereby protecting the first filling pump 2341.

[0051] See also Figure 1As shown, in one embodiment of the utility model, a pressure gauge is provided at the outlet of the first filling pump 2341, for example, to detect the pressure of the demulsifier at the outlet of the first filling pump 2341. The pressure gauge includes, for example, at least one of a pressure transmitter and an on-site pressure gauge.

[0052] See also Figure 1 As shown, in one embodiment of the utility model, the constant pressure reduction device further includes a calibration column 233, and the calibration column 233 is arranged between the demulsifier tank 232 and the filling branch line. In this embodiment, there are multiple filling branches, and the calibration column 233 is arranged between the multiple filling branches and the demulsifier tank 232. By setting the calibration column 233, the total instantaneous amount of demulsifiers transmitted in the multiple filling branches, that is, the instantaneous amount of demulsifiers transmitted in the first demulsifier filling pipeline 23, can be measured to facilitate the calculation of the usage of the demulsifier. Among them, the calibration column 233 is, for example, a static calibration column, a dynamic calibration column, a bucket-type calibration column, or a gravity-type calibration column.

[0053] See also Figure 1 As shown, in one embodiment of the utility model, after multiple filling branches are connected in parallel, a valve and a pressure measuring instrument 236 are set between the inlet of the mixer 21. Among them, there is one valve, for example, and the valve is an electric valve, a solenoid valve, a pneumatic valve or a manual valve, etc., to control the flow of the demulsifier into the mixer 21. In this embodiment, there is one pressure measuring instrument 236, for example, and the pressure measuring instrument 236 includes at least one of a pressure transmitter and an on-site pressure gauge, etc., to detect the pressure of the demulsifier input into the mixer 21.

[0054] See also Figure 1 As shown, the atmospheric and vacuum device also includes a crude oil blending storage tank 24 and an intermediate crude oil tank area 29, the inlet of the crude oil blending storage tank 24 is connected to the outlet of the mixer 21, and the outlet of the crude oil blending storage tank 24 is connected to the inlet of the intermediate crude oil tank area 29. After the crude oil and the demulsifier are mixed in the mixer 21, they enter the crude oil blending storage tank 24. In the crude oil blending storage tank 24, the brine is statically settled, and the brine and oil are stratified, with the oil in the upper layer and the brine in the lower layer. The bottom of the crude oil blending storage tank 24 is cut off to remove water and salt. Among them, at least one valve is set between the outlet of the mixer 21 and the inlet of the crude oil blending storage tank 24, and the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve or a manual valve, etc., to control the flow of materials between the mixer 21 and the crude oil blending storage tank 24. In this embodiment, three valves are provided between the outlet of the mixer 21 and the inlet of the crude oil blending storage tank 24, for example. When one valve fails, the flow of materials between the mixer 21 and the crude oil blending storage tank 24 can be controlled by other valves.

[0055] See also Figure 1As shown, a transfer pump 27 is provided between the crude oil blending storage tank 24 and the intermediate crude oil tank area 29 to increase the pressure of the crude oil at the outlet of the crude oil blending storage tank 24 so that the crude oil can flow smoothly into the intermediate crude oil tank area 29. In this embodiment, the transfer pump 27 is, for example, a centrifugal pump, an axial flow pump, a diaphragm pump or a reciprocating pump, and the flow rate of the transfer pump 27 is, for example, 700-1600m 3 / h, the lift of the transfer pump 27 is, for example, 80-120m.

[0056] See also Figure 1 As shown, in one embodiment of the utility model, the atmospheric and vacuum pressure reducing device further includes a transfer pump main line 25, and the transfer pump main line 25 connects the outlet of the crude oil blending storage tank 24 and the inlet of the transfer pump 27 to connect the crude oil blending storage tank 24 and the transfer pump 27. Among them, at least one valve is provided on the transfer pump main line 25, for example, to control whether the crude oil is connected between the crude oil blending storage tank 24 and the transfer pump 27. In this embodiment, four valves are provided on the transfer pump main line 25, for example, and the valves include at least one of an electric valve, a solenoid valve, a pneumatic valve, and a manual valve. If only one valve is provided on the transfer pump main line 25, when the valve fails, it is impossible to control whether the crude oil is connected between the crude oil blending storage tank 24 and the transfer pump 27 through the valve. Therefore, by providing multiple valves, when one valve fails, other valves can be used to control whether the crude oil is connected between the crude oil blending storage tank 24 and the transfer pump 27, so as to improve the operational flexibility of the atmospheric and vacuum pressure reducing device.

[0057] See also Figure 1 As shown, in one embodiment of the utility model, a second filter 26 is provided on the transfer pump main line 25, and the second filter 26 filters the crude oil at the outlet of the crude oil blending storage tank 24. By providing the second filter 26, mechanical impurities in the crude oil at the outlet of the crude oil blending storage tank 24 can be filtered out, so as to avoid mechanical impurities clogging subsequent pipelines and equipment, and ensure the smooth operation of the atmospheric and vacuum decompression device.

[0058] See also Figure 1 As shown, in one embodiment of the present utility model, the atmospheric and vacuum device further includes a transfer pump sub-line 28, and the transfer pump sub-line 28 is connected to the inlet of the second filter 26 and the outlet of the transfer pump 27. The transfer pump 27 is connected in series with the second filter 26 and connected in parallel with the transfer pump sub-line 28. When the transfer pump 27 fails and cannot transport crude oil, the transfer pump sub-line 28 is set as a backup, so that the crude oil in the crude oil blending storage tank 24 can continue to be transported to the subsequent equipment to increase the stability of the atmospheric and vacuum device. For example, at least one valve is set on the transfer pump sub-line 28 to control the circulation of crude oil in the transfer pump sub-line 28. In this embodiment, for example, a valve is set on the transfer pump sub-line 28, and the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve, and a manual valve.

[0059] See also Figure 1 As shown, in one embodiment of the utility model, the atmospheric and vacuum device further includes an intermediate crude oil tank area 29 and an electric desalter 34, the inlet of the intermediate crude oil tank area 29 is connected to the outlet of the crude oil blending storage tank 24, and the outlet of the intermediate crude oil tank area 29 is connected to the electric desalter 34. In this embodiment, the inlet of the intermediate crude oil tank area 29 is connected to the outlet of the transfer pump 27. In the intermediate crude oil tank area 29, due to the effect of the demulsifier, the brine settles statically, and the brine and oil continue to be stratified, with the oil in the upper layer and the brine in the lower layer. The bottom of the intermediate crude oil tank area 29 is cut off to remove water and salt. Among them, at least one valve is set between the outlet of the transfer pump 27 and the inlet of the intermediate crude oil tank area 29, and the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve or a manual valve, etc., to control the circulation of crude oil between the transfer pump 27 and the intermediate crude oil tank area 29. In this embodiment, four valves are set between the outlet of the transfer pump 27 and the inlet of the intermediate crude oil tank area 29. Among them, one valve is, for example, arranged on a side close to the transfer pump 27, and the valve is, for example, a check valve, to prevent the crude oil between the transfer pump 27 and the intermediate crude oil tank area 29 from flowing back to the transfer pump 27, thereby protecting the transfer pump 27. The other three valves are, for example, arranged on a side of the check valve away from the transfer pump 27. By arranging multiple valves, when one valve fails, the flow of crude oil between the transfer pump 27 and the intermediate crude oil tank area 29 can be controlled by other valves, thereby improving the operational flexibility of the atmospheric and vacuum distillation device.

[0060] See also Figure 1 As shown, a feed pump 32 is provided between the intermediate crude oil tank area 29 and the electric desalter 34 to increase the pressure of the crude oil at the outlet of the intermediate crude oil tank area 29 so that the crude oil can flow smoothly into the electric desalter 34. In this embodiment, the feed pump 32 is, for example, a centrifugal pump, an axial flow pump, a diaphragm pump or a reciprocating pump, and the flow rate of the feed pump 32 is, for example, 600-1400m 3 / h, and the lift of the feed pump 32 is, for example, 100-500m.

[0061] See also Figure 1As shown, in one embodiment of the utility model, the atmospheric and vacuum device further includes a feed pump main line 30, which connects the outlet of the intermediate crude oil tank area 29 and the inlet of the feed pump 32 to connect the intermediate crude oil tank area 29 and the feed pump 32. Among them, at least one valve is provided on the feed pump main line 30, for example, to control whether the crude oil is connected between the intermediate crude oil tank area 29 and the feed pump 32. In this embodiment, three valves are provided on the feed pump main line 30, for example, and the valves include at least one of an electric valve, a solenoid valve, a pneumatic valve, and a manual valve. If only one valve is provided on the feed pump main line 30, when the valve fails, it is impossible to control whether the crude oil is connected between the intermediate crude oil tank area 29 and the feed pump 32 through the valve. Therefore, by providing multiple valves, when one valve fails, other valves can be used to control whether the crude oil is connected between the intermediate crude oil tank area 29 and the feed pump 32, so as to improve the operational flexibility of the atmospheric and vacuum device.

[0062] See also Figure 1 As shown, in one embodiment of the utility model, a third filter 31 is provided on the main line 30 of the feed pump, and the third filter 31 filters the crude oil at the outlet of the intermediate crude oil tank area 29. By providing the third filter 31, mechanical impurities in the crude oil at the outlet of the intermediate crude oil tank area 29 can be filtered out, so as to avoid mechanical impurities clogging subsequent pipelines and equipment, and ensure the smooth operation of the atmospheric and vacuum decompression device.

[0063] See also Figure 1 As shown, in one embodiment of the utility model, the constant pressure reduction device also includes a feed pump auxiliary line 33, and the feed pump auxiliary line 33 is connected to the inlet of the third filter 31 and the outlet of the feed pump 32. Wherein, the feed pump 32 and the third filter 31 are connected in series, and are connected in parallel with the feed pump auxiliary line 33. When the feed pump 32 fails and cannot transport crude oil, the feed pump auxiliary line 33 is set as a backup, and the crude oil in the intermediate crude oil tank area 29 can continue to be transported to the subsequent equipment to increase the stability of the operation of the constant pressure reduction device. Wherein, at least one valve is set on the feed pump auxiliary line 33, for example, to control the circulation of crude oil in the feed pump auxiliary line 33. In this embodiment, a valve is set on the feed pump auxiliary line 33, for example, and the valve is an electric valve, a solenoid valve, a pneumatic valve, a manual valve, etc.

[0064] See also Figure 1As shown, in one embodiment of the utility model, the inlet of the electric desalter 34 is connected to the outlet of the intermediate crude oil tank area 29. In this embodiment, the inlet of the electric desalter 34 is connected to the outlet of the feed pump 32, and at least one valve is provided between the inlet of the electric desalter 34 and the outlet of the feed pump 32, and the valve is, for example, an electric valve, a solenoid valve, a pneumatic valve or a manual valve, etc., to control the flow of materials between the inlet of the electric desalter 34 and the outlet of the feed pump 32. In this embodiment, three valves are provided between the inlet of the electric desalter 34 and the outlet of the feed pump 32, for example. Among them, one valve is provided on a side close to the feed pump 32, for example, and the valve is a check valve to prevent the crude oil between the feed pump 32 and the electric desalter 34 from flowing back into the feed pump 32, so as to protect the feed pump 32. The remaining three valves are, for example, arranged on the side of the check valve away from the feed pump 32. By setting multiple valves, when one valve fails, the flow of crude oil between the feed pump 32 and the electric desalting equipment 34 can be controlled by other valves, thereby improving the operational flexibility of the constant pressure reduction device.

[0065] See also Figure 1 As shown, in one embodiment of the utility model, the constant pressure reduction device also includes a second demulsifier filling pipeline 35, and the second demulsifier filling pipeline 35 is connected to the inlet of the electric desalter 34. Among them, at least one valve is set on the second demulsifier filling pipeline 35, for example, to control the circulation of the demulsifier on the second demulsifier filling pipeline 35. In this embodiment, a valve is set on the second demulsifier filling pipeline 35, for example, and the valve is an electric valve, a solenoid valve, a pneumatic valve or a manual valve. Purified water is added to the crude oil through the electric desalter 34, and the salts in the crude oil are dissolved in the purified water, so that the salts in the crude oil are further diluted. Under the combined action of the high-voltage electric field of the electric desalter 34 and the demulsifier added to the second demulsifier filling pipeline 35, the tiny water droplets are aggregated into large water droplets, which are removed from the crude oil by gravity, thereby achieving the purpose of dehydration and desalination.

[0066] See also Figure 1 As shown, in one embodiment of the utility model, the atmospheric and vacuum device further includes atmospheric and vacuum equipment 36, and the inlet of the atmospheric and vacuum equipment 36 is connected to the outlet of the electric desalter 34. In this embodiment, the crude oil that has been dehydrated and desalted by the electric desalter 34 enters the atmospheric and vacuum equipment 36, and the crude oil is distilled according to the different boiling points of the components in the crude oil to obtain different products, and the products are sent from the outlet of the atmospheric and vacuum equipment 36 to the downstream device for utilization. Among them, the atmospheric and vacuum equipment 36 includes, for example, a primary distillation tower, an atmospheric distillation tower, and a vacuum distillation tower, and the products include, for example, naphtha, kerosene, diesel, wax oil, and residual oil.

[0067] See also Figure 1As shown, the constant pressure reduction device provided by the utility model can significantly reduce the salt content in the crude oil before the inlet of the electric desalter 34 (the salt content is at least below 6wt%) by jointly injecting a demulsifier at the inlet of the mixer 21 and the inlet of the electric desalter 34, reduce the amount of purified water used by the electric desalter 34, increase the proportion of inferior oil in the mixed crude oil raw material (from the original 25%-30% to the current 60%-70%), and improve the utilization rate of the inferior oil.

[0068] In summary, the utility model proposes a vacuum device for processing crude oil, which can deepen the depth of crude oil dehydration and desalination by adding a demulsifier before the mixer inlet and the electric desalter inlet, fully reduce the salt and water content in the crude oil, reduce the energy consumption of the vacuum device, and maintain the stable operation of the vacuum device and its downstream devices. Moreover, the vacuum device provided by the utility model can reduce the corrosion of salt to equipment and pipelines, and extend the service life of the vacuum device and its downstream devices.

[0069] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that the specific features, structures, or characteristics described in conjunction with the embodiment are included in at least one embodiment of the utility model, and not necessarily in all embodiments. Thus, the various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics of any specific embodiment of the utility model may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the utility model embodiments described and shown herein may be based on the teachings herein and will be considered part of the spirit and scope of the utility model.

[0070] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the utility model, such as the technical solution formed by replacing the above-mentioned features with the technical features with similar functions disclosed in this application (but not limited to). In addition to the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the remaining technical features will not be repeated here.

Claims

1. A crude oil processing atmospheric and vacuum device, characterized in that: At least: Crude oil component tanks; a mixer, the inlet of the mixer being connected to the outlet of the crude oil component tank; a crude oil blending storage tank, wherein the inlet of the crude oil blending storage tank is connected to the outlet of the mixer; An intermediate crude oil tank farm, wherein the inlet of the intermediate crude oil tank farm is connected to the outlet of the crude oil blending storage tank; an electric desalter, wherein the inlet of the electric desalter is connected to the outlet of the intermediate crude oil tank farm; A constant pressure reduction device, wherein the inlet of the constant pressure reduction device is connected to the outlet of the electric desalination device; A first demulsifier filling pipeline is arranged at the inlet of the mixer; as well as The second demulsifier filling pipeline is arranged at the inlet of the electric desalination equipment.

2. The atmospheric and vacuum device according to claim 1, characterized in that: The demulsifier first filling pipeline comprises a filling pump, and the demulsifier is input into the inlet of the filling pump.

3. The atmospheric and vacuum device according to claim 2, characterized in that: The first demulsifier filling pipeline comprises a demulsifier tank, and the inlet of the demulsifier tank is connected to the outlet of the filling pump.

4. The atmospheric and vacuum device according to claim 3, characterized in that: The demulsifier first filling pipeline includes at least one filling branch line, the inlet of the filling branch line is connected to the outlet of the demulsifier tank, and the outlet of the filling branch line is connected to the inlet of the mixer.

5. The atmospheric and vacuum device according to claim 4, characterized in that: The demulsifier first filling pipeline comprises a calibration column, and the calibration column is arranged between the demulsifier tank and the filling branch line.

6. The atmospheric and vacuum device according to claim 5, characterized in that: When there are multiple filling branch lines, the multiple filling branch lines are connected in parallel, and the multiple filling branch lines are arranged on a side of the calibration column away from the demulsifier tank.

7. The atmospheric and vacuum device according to claim 6, characterized in that: The first demulsifier filling pipeline comprises a filling pump, and the filling pump is arranged on the filling branch line. When there are multiple filling branch lines, at least one filling pump is arranged on each filling branch line.

8. The atmospheric and vacuum device according to claim 1, characterized in that: A first filter and a blending pump are arranged between the crude oil component tank and the mixer, and a blending pump secondary line is also arranged at the inlet of the first filter and the outlet of the blending pump. The first filter and the blending pump are connected in series and are arranged in parallel with the blending pump secondary line.

9. The atmospheric and vacuum device according to claim 1, characterized in that: A second filter and a transfer pump are arranged between the crude oil blending storage tank and the intermediate crude oil tank area. A transfer pump secondary line is also arranged at the inlet of the second filter and the outlet of the transfer pump. The second filter is connected in series with the transfer pump and is arranged in parallel with the transfer pump secondary line.

10. The atmospheric and vacuum device according to claim 1, characterized in that: A third filter and a feed pump are arranged between the intermediate crude oil tank area and the electric desalter, and a feed pump sub-line is also arranged at the inlet of the third filter and the outlet of the feed pump. The third filter is connected in series with the feed pump and is arranged in parallel with the feed pump sub-line.

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