Liquid hydrocarbon flow online monitoring equipment

Abstract

The present invention relates to a liquid hydrocarbon transportation technology, and in particular to a liquid hydrocarbon flow online monitoring device for monitoring the flow of liquid hydrocarbons, comprising a primary temperature controller, a primary flow detector, a secondary temperature controller, a secondary flow detector, and a tertiary temperature controller which are connected in sequence. The temperature of the liquid inlet of the primary flow detector is controlled by the primary temperature controller to reach a preset value. Under the preset value, the flow rate and weight corresponding to the liquid of the fixed component are in a linear relationship, so that a primary flow detection can be performed. The temperature of the liquid inlet of the secondary flow detector is controlled by the secondary temperature controller to reach a preset value. Under the preset value, the flow rate and weight corresponding to the liquid of the fixed component are also in a linear relationship, so that a secondary flow detection can be performed. The results of the primary flow detection and the secondary flow detection are compared, and correction can be performed.

Description

Technical Field

[0001] The invention relates to a liquid hydrocarbon transportation technology, in particular to a liquid hydrocarbon flow rate online monitoring device for monitoring the liquid hydrocarbon flow rate. Background Art

[0002] Liquid hydrocarbons refer to hydrocarbon compounds with 5 to 16 carbon atoms that are liquid at normal temperature and pressure. They are usually obtained through crude oil refining or coal pyrolysis.

[0003] Mainly includes kerosene, with an average molecular weight between 200-250 and a density of 0.8g / cm³, used as power kerosene, solvent kerosene, lamp kerosene, fuel kerosene, and washing kerosene;

[0004] Diesel, with a carbon number of about 10-22, is mainly used as fuel and is widely used in large vehicles, railway locomotives, and ships;

[0005] Gasoline, with a carbon number of about 5-12, is an important fuel for engines and has a density of 0.70-0.78g / cm³.

[0006] Liquid hydrocarbons are usually prepared by crude oil distillation, which is then stored in pressure vessels. During the distillation and filling process, flow detection is required.

[0007] Since liquid hydrocarbons are flammable, explosive and volatile, high-level security treatment is required during the preparation process. In addition, since the liquid hydrocarbons obtained after liquid hydrocarbon fractionation are a mixture, the compression ratio, density, etc. are greatly affected by temperature and pressure. In the process of detecting the flow of liquid hydrocarbons, a volumetric flow meter is usually used. During the flow detection process, temperature and pressure control are performed. For this purpose, corresponding national standards have been formulated, such as GB / T 17288-2009 / ISO 2714:1980, which specifies the liquid hydrocarbon volume measurement volumetric flow meter metering system, specifies the control liquid type, flow, pressure, temperature, and the selection of the flow meter, thereby ensuring the normal operation of the flow detection.

[0008] In the process of flow detection of liquid hydrocarbons, the temperature of the liquid hydrocarbon pipeline is usually controlled by controlling the overall environment, and the pressure and flow are controlled by combining a booster pump with an overflow valve, thereby providing a basis for flow meter detection. The flow detection specifically uses an oval gear flowmeter with high detection accuracy.

[0009] In actual use, it takes a long time for the overall temperature of the workshop to change, and fresh air needs to be circulated in the workshop to avoid the enrichment of volatile gases, which in turn leads to a reduction in temperature control ability. Summary of the invention

[0010] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an online monitoring device for liquid hydrocarbon flow that can quickly control temperature and pressure and can perform flow detection after two temperature and pressure controls to obtain more accurate data.

[0011] The present invention is realized by the following technical scheme: an online monitoring device for liquid hydrocarbon flow rate, comprising a primary temperature controller, a primary flow detector, a secondary temperature controller, a secondary flow detector, and a tertiary temperature controller connected in sequence.

[0012] The primary temperature controller is used to control the temperature of the liquid hydrocarbon to detection temperature one;

[0013] The secondary temperature controller is used to control the temperature of the liquid hydrocarbon to a second detection temperature, wherein the first detection temperature is different from the second detection temperature;

[0014] The three-stage temperature controller is used to control the temperature of the liquid hydrocarbon to the delivery temperature;

[0015] A pressure control device is arranged between the primary temperature controller, the secondary temperature controller and the tertiary temperature controller. The pressure control device includes a ventilation pipe arranged between the primary temperature controller, the secondary temperature controller and the tertiary temperature controller. The ventilation pipe is connected to a compressor, and the compressor is connected to a purification device. The primary temperature controller and the secondary temperature controller are connected to temperature sensors.

[0016] Furthermore, the primary temperature controller and the secondary temperature controller both include a liquid-passing inner cylinder, a sealing sleeve is provided outside the liquid-passing inner cylinder, a refrigerant cavity is formed between the sealing sleeve and the liquid-passing inner cylinder, and the refrigerant cavity is connected to the refrigeration system through a refrigerant pipe.

[0017] Furthermore, the detection head of the temperature sensor extends into the liquid-passing inner cylinder, and a sealing connection device is provided between the temperature sensor, the liquid-passing inner cylinder and the sealing sleeve. The sealing connection device includes a sealing ring 1 provided on the outer shell of the temperature sensor, and the sealing ring 1 is sealedly connected to the liquid-passing inner cylinder. A sealing ring 2 is also provided on the outer shell of the temperature sensor, and the sealing ring 2 is sealedly connected to the sealing sleeve.

[0018] Furthermore, the liquid-passing inner cylinder is provided with a liquid inlet pipe and a liquid outlet pipe, and both the liquid inlet pipe and the liquid outlet pipe extend into the liquid-passing inner cylinder. The length of the liquid inlet pipe in the liquid-passing inner cylinder is 3 / 5-4 / 5 of the length of the liquid-passing inner cylinder, and the length of the liquid outlet pipe in the liquid-passing inner cylinder is 3 / 5-4 / 5 of the length of the liquid-passing inner cylinder.

[0019] Furthermore, a sealing support device is arranged between the liquid inlet pipe and the liquid outlet pipe and the liquid passing inner cylinder and the sealing sleeve. The sealing support device includes a support sleeve arranged on the liquid passing inner cylinder. The liquid inlet pipe and the liquid outlet pipe seal through the corresponding support sleeves, and an elastic sealing ring is mounted on the outside of the support sleeve.

[0020] Furthermore, the three-stage temperature controller includes a liquid passage pipe, and heat exchange fins are arranged outside the liquid passage pipe.

[0021] Furthermore, the ventilation pipe is connected to the primary temperature controller, the secondary temperature controller and the tertiary temperature controller respectively through a manifold, a valve is provided on the manifold, the outlet end of the manifold extends to the upper part of the primary temperature controller and the secondary temperature controller, and the outlet end of the manifold extends to the lower part of the tertiary temperature controller.

[0022] Furthermore, the purification device includes a sedimentation bin, a floating purification device is arranged above the sedimentation bin, the floating purification device includes a base, the base is sealed and slidably connected to the side wall of the sedimentation bin, a primary purification layer and a secondary purification layer are arranged on the base from bottom to top, the sedimentation bin is connected to a sedimentation bin inlet pipe and a sedimentation bin outlet pipe, and the sedimentation bin inlet pipe is connected to a compressor.

[0023] Furthermore, a sampling device is also provided on the base, and the sampling device includes a deposition type sampling device, and the deposition type sampling device includes a sampling frame provided on the base, a plurality of sampling slots are provided in the sampling frame, and a sampling carrier is provided in the sampling slot.

[0024] Furthermore, the sampling device includes an instant sampling device, which includes an exhaust pipe, a exhaust piston is arranged in the exhaust pipe, an air inlet pipe is arranged at the bottom of the exhaust pipe, an air inlet is arranged on the air inlet pipe, a guide head is arranged at the lower end of the air inlet pipe, and a sampling sleeve is arranged on the outside of the air inlet pipe.

[0025] The beneficial effects of the present invention are as follows: the liquid hydrocarbon flow online monitoring equipment includes a primary temperature controller, a primary flow detector, a secondary temperature controller, a secondary flow detector, and a tertiary temperature controller which are connected in sequence. The temperature of the liquid inlet of the primary flow detector is controlled by the primary temperature controller to reach a preset value. Under the preset value, the flow rate and weight corresponding to the liquid of the fixed component are linearly related, so that a primary flow detection can be performed. The temperature of the liquid inlet of the secondary flow detector is controlled by the secondary temperature controller to reach a preset value. Under the preset value, the flow rate and weight corresponding to the liquid of the fixed component are also linearly related, so that a secondary flow detection can be performed. The results of the primary flow detection and the secondary flow detection are compared and corrected. The primary temperature controller and the secondary temperature controller are set to quickly control the temperature of the liquid hydrocarbon passing through the flow detector without changing the overall environment. The tertiary temperature controller is set to restore the temperature of the liquid hydrocarbon to the delivery temperature. The pressure control device is set to control the pressure through the compressor to meet the design pressure requirement and ensure the normal flow detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of Example 1;

[0027] Figure 2 This is a disassembly diagram of Example 1;

[0028] Figure 3 It is a schematic diagram of the structure of a primary temperature controller;

[0029] Figure 4 This is a disassembly diagram of the first-stage temperature controller;

[0030] Figure 5 It is a cross-sectional schematic diagram of a primary temperature controller;

[0031] Figure 6 for Figure 5 A partial enlarged schematic diagram in the middle;

[0032] Figure 7 This is a schematic diagram of the temperature sensor installation;

[0033] Figure 8 This is a schematic diagram of the manifold installation;

[0034] Fig. 9 It is a schematic diagram of the structure of a three-stage temperature controller;

[0035] Fig.10 It is a cross-sectional schematic diagram of a three-stage temperature controller;

[0036] Fig.11 This is a schematic diagram of the cross section of the sedimentation chamber;

[0037] Fig.12 It is a top view of the sampling framework;

[0038] Fig.13 It is a cross-sectional schematic diagram of the instant sampling device;

[0039] Among them: 1. Primary temperature controller; 2. Primary flow detector; 3. Ventilation pipe; 4. Manifold; 5. Electric control valve; 6. Pressure sensor; 7. Secondary temperature controller; 8. Secondary flow detector; 9. Third-level temperature controller; 10. Circulation pump 1; 11. Refrigerant tank; 12. Distribution valve; 13. Circulation pump 2; 14. Return pipe; 15. Sedimentation chamber; 16. Compressor; 17. Throttle valve; 18. Liquid inlet pipe; 19. Temperature sensor; 20. Manifold pipe; 21. Sealing sleeve; 22. Liquid outlet pipe; 23. Positioning ring; 24. Elastic sealing ring; 25. Support sleeve; 26. Liquid inner cylinder; 27 , refrigerant chamber; 28, sampling sleeve; 29, guide head; 30, sealing ring; 32, socket; 33, bolt; 34, threaded interface; 35, support ring; 36, sealing ring one; 37, sealing gasket one; 39, sealing ring two; 40, sealing gasket two; 41, auxiliary interface; 42, heat exchange fin; 43, sedimentation bin inlet pipe; 44, sedimentation bin outlet pipe; 45, support block; 46, bottom support; 47, guide ring; 48, sampling frame; 49, sampling trough; 50, primary purification layer; 51, secondary purification layer; 52, dust cover; 53, exhaust pipe; 54, exhaust piston; 55, intake pipe; 56, air inlet. DETAILED DESCRIPTION

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0042] Example 1

[0043] like Figure 1-13As shown, a liquid hydrocarbon flow online monitoring device includes a primary temperature controller 1, a primary flow detector 2, a secondary temperature controller 7, a secondary flow detector 8, and a tertiary temperature controller 9 which are connected in sequence.

[0044] Among them, the first-level temperature controller 1 is used to control the temperature of the liquid hydrocarbon to the detection temperature one, and the second-level temperature controller 7 is used to control the temperature of the liquid hydrocarbon to the detection temperature two. The detection temperature one and the detection temperature two are different. The liquid hydrocarbon mainly includes kerosene, diesel and gasoline. Among them, kerosene, diesel and gasoline have different densities under 20℃ and 0℃ environments. The detection temperature one is set to 0℃ and the detection temperature two is set to 20℃.

[0045] The primary temperature controller 1 and the secondary temperature controller 7 both include a liquid-passing inner cylinder 26, which is made of stainless steel and has good thermal conductivity and corrosion resistance. The outer sealing sleeve of the liquid-passing inner cylinder 26 is provided with a sealing sleeve 21, and the outer sealing sleeve 21 is provided with a heat-insulating layer. It is worth noting that the control temperature of the secondary temperature controller 7 is 20°C, which is close to the room temperature, and no heat-insulating layer is required. A refrigerant cavity 27 is formed between the sealing sleeve 21 and the liquid-passing inner cylinder 26, and the refrigerant cavity 27 is connected to the refrigeration system through a refrigerant pipe. In this embodiment, the refrigeration system includes a classic air-conditioning system consisting of an evaporator, a condenser, a compressor, and a liquid storage tank. The evaporator is connected to the refrigerant tank 11 to cool the refrigerant in the refrigerant tank 11. The refrigerant tank 11 is wrapped with a heat-insulating layer, and the refrigerant is filled in the refrigerant. The refrigerant is a sodium chloride solution with a concentration of 15%. The temperature in the refrigerant tank 11 is controlled at -2°C, and it still remains in liquid state, with low cost. The refrigerant tank 11 can also be connected to the fire extinguishing nozzle to extinguish the fire faster. The refrigerant tank 11 is connected to the primary temperature controller 1 through a pipeline with a circulating pump 10 and a throttle valve 17, specifically connected to the refrigerant chamber 27 of the primary temperature controller 1, and the liquid passing through the primary temperature controller 1 is cooled to 0°C, and then the flow rate in a 0°C environment is detected. The refrigerant chamber 27 of the primary temperature controller 1 is connected to the refrigerant chamber 27 of the secondary temperature controller 7 through a pipeline with a distribution valve 12 and a circulation pump 2 13. The second outlet of the distribution valve 12 is connected to the refrigerant tank 11 through the reflux pipe 14. By controlling the opening of the distribution valve 12, the refrigerant flow entering the secondary temperature controller 7 is controlled, and then the temperature in the secondary temperature controller 7 is controlled to 20°C.

[0046] Both the primary flow detector 2 and the secondary flow detector 8 use elliptical gear flow meters with high detection accuracy and the ability to upload data. Due to the complex composition of liquid hydrocarbons, the flow is detected under different temperature environments, and the two flow data are compared to reduce errors, especially by first lowering the temperature to 0°C. At this temperature, the internal energy of the liquid hydrocarbons is reduced, and the stability is improved, thereby achieving high detection stability.

[0047] The primary temperature controller 1 and the secondary temperature controller 7 are connected with a temperature sensor 19. Specifically, the detection head of the temperature sensor 19 extends into the liquid-passing inner cylinder 26. A sealing connection device is installed between the temperature sensor 19, the liquid-passing inner cylinder 26 and the sealing sleeve 21. The sealing connection device includes a sealing ring 1 36 fixed on the outer shell of the temperature sensor 19. The sealing ring 1 36 is sealed with the liquid-passing inner cylinder 26. A sealing ring 2 39 is also installed on the outer shell of the temperature sensor 19. The sealing ring 2 39 is sealed with the sealing sleeve 21. Specifically, the temperature sensor 19 first uses a PT100 temperature sensor, and a sealing ring 1 36 is fixedly welded on the outer shell of the temperature sensor 19. An interface is stamped inwardly on the liquid-passing inner cylinder 26, and threads are processed at the interface to form a threaded interface 34. The outer shell of the temperature sensor 19 is threadedly connected to the threaded interface 34. A sealing gasket 1 37 is installed between the sealing ring 1 36 and the liquid-passing inner cylinder 26. The temperature sensor 19 is twisted to allow a sealing ring 1 36 to pass through the liquid-passing inner cylinder 26. The sealing gasket 37 is sealed, and a support ring 35 is stamped inwardly at the corresponding threaded interface 34 on the sealing sleeve 21. The inner diameter of the support ring 35 is greater than the outer diameter of the sealing ring 36, so that the sealing ring 36 can pass through the support ring 35 inwardly, and a support can be formed between the liquid inner cylinder 26 and the sealing sleeve 21 through the support ring 35, thereby avoiding local deformation of the liquid inner cylinder 26 and the sealing sleeve 21 during the installation of the temperature sensor 19, thereby ensuring the sealing performance. There is also a seal ring 39 between the sealing ring 2 and the sealing sleeve 21. A sealing gasket 2 40 is installed, and a sealing ring 2 39 is threadedly connected to the outer shell of the temperature sensor 19. During the installation process, the sealing gasket 1 37 and the sealing gasket 2 40 are first installed, and the temperature sensor 19 is screwed inward to make the sealing gasket 1 37, the sealing ring 1 36, and the liquid-passing inner cylinder 26 press and seal tightly, and then the sealing ring 2 39 is screwed. The sealing ring 2 39 brings the sealing sleeve 21 and the liquid-passing inner cylinder 26 close to each other, and is supported by the support ring 35, so that the sealing gasket 2 40, the sealing ring 2 39, and the sealing sleeve 21 are pressed tightly.

[0048] In this embodiment, the liquid-passing inner cylinder 26 is equipped with a liquid inlet pipe 18 and a liquid outlet pipe 22, and the liquid inlet pipe 18 and the liquid outlet pipe 22 both extend into the liquid-passing inner cylinder 26. The length of the liquid inlet pipe 18 in the liquid-passing inner cylinder 26 is 3 / 5-4 / 5 of the length of the liquid-passing inner cylinder 26, and the length of the liquid outlet pipe 22 in the liquid-passing inner cylinder 26 is 3 / 5-4 / 5 of the length of the liquid-passing inner cylinder 26. In this way, the flow path length of the liquid hydrocarbon in the primary temperature controller 1 and the secondary temperature controller 7 can be extended, and the temperature control effect can be improved. The liquid inlet pipe 18 is located at the upper part of the liquid-passing inner cylinder 26, and the liquid outlet pipe 22 is located at the lower part of the liquid-passing inner cylinder 26, which can ensure that the liquid hydrocarbon passing through the primary flow detector 2 and the secondary flow detector 8 is sufficient and avoid the introduction of bubbles.

[0049] A sealing support device is installed between the liquid inlet pipe 18 and the liquid outlet pipe 22 and the liquid passing inner cylinder 26 and the sealing sleeve 21. The sealing support device includes a support sleeve 25 installed on the liquid passing inner cylinder 26. The liquid inlet pipe 18 and the liquid outlet pipe 22 pass through the corresponding support sleeves 25 in a sealed manner. An elastic sealing ring 24 is sleeved on the outer surface of the support sleeve 25. Specifically, the sealing ring of the support sleeve 25 is welded on the liquid passing inner cylinder 26. A sealing ring 30 is installed on the inner wall of the support sleeve 25. A socket 32 ​​is processed on the sealing sleeve 21 at the position corresponding to the support sleeve 25. The outer diameter value of the socket 32 ​​is between the outer diameter value of the support sleeve 25 and the outer diameter value of the elastic sealing ring 24. A socket 32 ​​is fixed on the liquid inlet pipe 18 and the liquid outlet pipe 22. The support sleeve 25 corresponds to the positioning ring 23, and the positioning ring 23 and the support sleeve 25 are connected by bolts 33. The outer diameter of the positioning ring 23 is greater than the outer diameter of the socket 32. During installation, one of the end faces of the sealing sleeve 21 is not installed, and the liquid-passing contents are inserted into the sealing sleeve 21. After adjusting the position, the end face of the sealing sleeve 21 is installed, sealed and welded, and then the liquid inlet pipe 18 and the liquid outlet pipe 22 are inserted. Through the cooperation of the bolts 33, the support sleeve 25 and the positioning ring 23, the liquid-passing inner cylinder 26 and the sealing sleeve 21 are brought close to each other, and are sealed and supported by the elastic sealing ring 24. The installation is convenient, and the elastic sealing ring 24 is made of vulcanized rubber and has good elasticity and hardness.

[0050] The three-stage temperature controller 9 is used to control the temperature of the liquid hydrocarbon to the conveying temperature, that is, to restore the temperature of the liquid hydrocarbon to room temperature for conveying and filling operations. The three-stage temperature controller 9 includes a liquid passing pipe, and a heat exchange fin 42 is fixed to the outside of the liquid passing pipe. The structure is simple. An auxiliary interface 41 is also installed on the three-stage temperature controller 9 for connecting to component detection equipment, emergency discharge equipment, etc.

[0051] A pressure control device is installed between the primary temperature controller 1, the secondary temperature controller 7, and the tertiary temperature controller 9. The pressure control device includes a vent pipe 3 connected between the primary temperature controller 1, the secondary temperature controller 7, and the tertiary temperature controller 9. The vent pipe 3 is connected to a compressor 16, and the compressor 16 is connected to a purification device. Specifically, the vent pipe 3 is connected to the primary temperature controller 1, the secondary temperature controller 7, and the tertiary temperature controller 9 through a manifold 4. A valve is installed on the manifold 4. The valve is an electrically controlled valve 5. The outlet end of the manifold 4 extends to the upper part of the primary temperature controller 1 and the secondary temperature controller 7, and the outlet end of the manifold 4 extends to the lower part of the tertiary temperature controller 9. A pressure sensor 6 is installed on the vent pipe 3. During use, According to needs, the primary temperature controller 1, the secondary temperature controller 7, and the tertiary temperature controller 9 can be controlled by valves to be independent of each other or partially connected. When connected, the primary temperature controller 1, the secondary temperature controller 7, and the tertiary temperature controller 9 have the same pressure, which provides a basis for the stability of flow detection. A compressor 16 can also be installed on each temperature controller separately to control the pressure separately. The manifold 4 is connected to the primary temperature controller 1 and the secondary temperature controller 7 through the manifold pipe 20. A sealing connection device is installed between the manifold pipe 20 and the liquid-passing inner cylinder 26 and the sealing sleeve 21. The sealing connection device includes a sealing ring 36 fixed on the manifold pipe 20. The sealing connection between the sealing ring 36 and the liquid-passing inner cylinder 26 is A sealing ring 29 is also installed on the manifold pipe 20, and the sealing ring 29 is sealed and connected with the sealing sleeve 21. Specifically, a sealing ring 36 is fixed and welded on the manifold pipe 20, and an interface is punched inwardly on the liquid-passing inner cylinder 26. A thread is processed at the interface to form a threaded interface 34. The manifold pipe 20 and the threaded interface 34 are threadedly connected. A sealing gasket 37 is installed between the sealing ring 36 and the liquid-passing inner cylinder 26. The manifold pipe 20 is twisted to make the sealing ring 36 and the liquid-passing inner cylinder 26 sealed by the sealing gasket 37. A support ring 35 is punched inwardly at the corresponding threaded interface 34 on the sealing sleeve 21. The inner diameter of the support ring 35 is greater than the outer diameter of the sealing ring 36, so that the sealing ring 36 can pass through the support ring 35 inward. The support ring 35 can form a support between the liquid-passing inner cylinder 26 and the sealing sleeve 21, thereby avoiding local deformation of the liquid-passing inner cylinder 26 and the sealing sleeve 21 during the installation of the manifold pipe 20, thereby ensuring the sealing performance. A sealing gasket 240 is also installed between the sealing ring 39 and the sealing sleeve 21, and the sealing ring 39 and the manifold pipe 20 are threadedly connected. During the installation process, the sealing gasket 1 37 and the sealing gasket 240 are first installed, and the manifold pipe 20 is twisted inward to make the sealing gasket 1 37, the sealing ring 1 36 and the liquid-passing inner cylinder 26 pressed and sealed, and then the sealing ring 2 39 is twisted. The sealing ring 2 39 brings the sealing sleeve 21 and the liquid-passing inner cylinder 26 close to each other, and is supported by the support ring 35, thereby making the sealing gasket 240, the sealing ring 2 39 and the sealing sleeve 21 pressed tightly.

[0052] The pressure control device provided in this embodiment, after being connected, can regularly draw negative pressure through the compressor 16, so that the volatile gas enriched in the upper part of the primary temperature controller 1 and the secondary temperature controller 7 can be drawn out and enter the purification device. The purification device includes a sedimentation bin 15, and a floating purification device is installed above the sedimentation bin 15. The floating purification device includes a base 46. A support block 45 for lifting the base 46 is installed on the side wall of the sedimentation bin 15. A guide ring 47 that matches the inner wall of the sedimentation bin 15 is provided at the edge of the base 46. The guide ring 47 is made of nylon material and has a good lubrication effect. There is a sampling device on the base 46. The sampling device includes a sampling frame 48 placed on the base 46. The sampling frame 48 is made of polystyrene board, which is light in weight. A sampling trough 49 is provided in which a sampling carrier is laid. The sampling carrier is a sponge or cotton cloth. Adsorption particles, such as quartz sand, are filled in the sponge or cotton cloth. "Study on Factors Affecting the Adsorption Process of Petroleum Hydrocarbons by Mineral Particles in Seawater", Xia Wenxiang et al., July 2006, or porous granules disclosed in application No. 2011102913504. The adsorption particles are taken out regularly, dissolved in 50% alcohol, filtered, and then the components are detected by solvent analysis gas chromatography, and then the gas components extracted by the compressor 16 are judged to obtain the volatile gas components in the liquid hydrocarbons, and then the liquid hydrocarbon components are auxiliary judged. The judgment standard is generally that the more volatile gas components, the more the content of the component in the liquid hydrocarbons, which plays an auxiliary judgment role for subsequent packaging and quality control.

[0053] A primary purification layer 50 is laid on top of the sampling frame 48. The primary purification layer 50 includes two sponge layers. There is a paraffin layer between the two sponge layers. The paraffin layer is paraffin particles with a particle size of 1-2 mm and a thickness of 10 mm. It can absorb liquid hydrocarbon volatile gases very well. To further improve the absorption effect, there can be three sponge layers with two paraffin layers between the three sponge layers. A secondary purification layer 51 is arranged above the primary purification layer 50. The secondary purification layer 51 is composed of porous particles with a thickness of 20 mm. The porous particles are selected from activated carbon, pumice, volcanic rock, etc., and have a good adsorption effect, so as to absorb a small amount of volatile gases that escape. The primary purification layer 50 and the secondary purification layer 51 need to be replaced regularly.

[0054] A dust cover 52 is installed above the sedimentation bin 15 to protect the sedimentation bin 15. The sedimentation bin 15 is connected to a sedimentation bin inlet pipe 43 and a sedimentation bin outlet pipe 44. The sedimentation bin inlet pipe 43 is connected to the compressor 16. The sedimentation bin outlet pipe 44 is used to discharge the deposited liquid hydrocarbons.

[0055] The sampling device includes an instant sampling device, which includes an exhaust pipe 53, an exhaust piston 54 is installed in the exhaust pipe 53, an air inlet pipe 55 is integrally formed at the bottom of the exhaust pipe 53, an air inlet port 56 is processed on the air inlet pipe 55, a guide head 29 is integrally formed at the lower end of the air inlet pipe 55, and a sampling sleeve 28 is mounted on the outer cover of the air inlet pipe 55. The exhaust pipe 53, the air inlet pipe 55 and the guide head 29 are integrally formed of glass for easy cleaning. The air inlet pipe 55 can be inserted downward into the sedimentation bin 15 through the guide head 29 to extract the gas in the sedimentation bin 15. The sampling sleeve 28 is made of sponge. The sampling sleeve 28 is made of polyurethane foam cotton and can absorb hydrocarbon volatile gases. The polyurethane foam cotton is treated with high-temperature wind at 70°C for 10 minutes before use to remove unstable components. The gas in the sedimentation bin 15 is extracted through the exhaust piston 54, and the gas is extracted and discharged 10 times. After being absorbed by the polyurethane foam cotton, the polyurethane foam cotton is heated to 50°C after being taken out, and the volatile gas is collected for component detection.

[0056] During use, the compressor 16 extracts the gas in the ventilation pipe 3 and fills it into the sedimentation bin 15. Under the action of air pressure, the floating purification device is pushed upward, and the compressor 16 stops working. Under the action of gravity, the gas is discharged upward, and the floating purification device falls and resets, which can maintain the pressure and improve the liquefaction and sedimentation effect of the gas. In order to better improve the effect, the sedimentation bin 15 can be cooled to 0°C.

[0057] The primary flow detector, the electric control valve, the pressure sensor, the secondary flow detector, the circulation pump 1, the circulation pump 2, the compressor, and the temperature sensor are all connected to the controller, and the controller is connected to the host computer for online monitoring.

[0058] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid hydrocarbon flow online monitoring device, characterized in that: It includes a primary temperature controller, a primary flow detector, a secondary temperature controller, a secondary flow detector, and a tertiary temperature controller which are connected in sequence. The primary temperature controller is used to control the temperature of the liquid hydrocarbon to detection temperature one; The secondary temperature controller is used to control the temperature of the liquid hydrocarbon to a second detection temperature, wherein the first detection temperature is different from the second detection temperature; The three-stage temperature controller is used to control the temperature of the liquid hydrocarbon to the delivery temperature; A pressure control device is provided between the primary temperature controller, the secondary temperature controller and the tertiary temperature controller. The pressure control device includes a vent pipe connected between the primary temperature controller, the secondary temperature controller and the tertiary temperature controller. The vent pipe is respectively connected with the primary temperature controller, the secondary temperature controller and the tertiary temperature controller through a manifold. A valve is provided on the manifold. The vent pipe is connected with a compressor. The compressor is connected with a purification device. The primary temperature controller and the secondary temperature controller are connected with temperature sensors. The primary temperature controller and the secondary temperature controller both include a liquid inner cylinder, a sealing sleeve is provided on the outer sealing sleeve of the liquid inner cylinder, a refrigerant cavity is formed between the sealing sleeve and the liquid inner cylinder, the refrigerant cavity is connected to the refrigeration system through a refrigerant pipe, and the detection head of the temperature sensor extends into the liquid inner cylinder. The three-stage temperature controller comprises a liquid-passing pipe, and heat exchange fins are arranged outside the liquid-passing pipe.

2. The liquid hydrocarbon flow online monitoring device according to claim 1, characterized in that: A sealing connection device is provided between the temperature sensor, the liquid-passing inner cylinder and the sealing sleeve. The sealing connection device includes a sealing ring 1 provided on the outer shell of the temperature sensor, and the sealing ring 1 is sealedly connected to the liquid-passing inner cylinder. A sealing ring 2 is also provided on the outer shell of the temperature sensor, and the sealing ring 2 is sealedly connected to the sealing sleeve.

3. The liquid hydrocarbon flow online monitoring device according to claim 1, characterized in that: The liquid-passing inner cylinder is provided with a liquid inlet pipe and a liquid outlet pipe, and both the liquid inlet pipe and the liquid outlet pipe extend into the liquid-passing inner cylinder. The length of the liquid inlet pipe in the liquid-passing inner cylinder is 3 / 5-4 / 5 of the length of the liquid-passing inner cylinder, and the length of the liquid outlet pipe in the liquid-passing inner cylinder is 3 / 5-4 / 5 of the length of the liquid-passing inner cylinder.

4. The liquid hydrocarbon flow rate online monitoring device according to claim 3, characterized in that: A sealing support device is arranged between the liquid inlet pipe and the liquid outlet pipe and the liquid passing inner cylinder and the sealing sleeve. The sealing support device includes a support sleeve arranged on the liquid passing inner cylinder. The liquid inlet pipe and the liquid outlet pipe seal through the corresponding support sleeves, and an elastic sealing ring is mounted on the outer side of the support sleeve.

5. The liquid hydrocarbon flow online monitoring device according to claim 1, characterized in that: The outlet end of the manifold extends to the upper part of the primary temperature controller and the secondary temperature controller, and the outlet end of the manifold extends to the lower part of the tertiary temperature controller.

6. The liquid hydrocarbon flow online monitoring device according to claim 1, characterized in that: The purification device includes a sedimentation bin, a floating purification device is arranged above the sedimentation bin, the floating purification device includes a base, the base is sealed and slidably connected to the side wall of the sedimentation bin, a primary purification layer and a secondary purification layer are arranged on the base from bottom to top, the sedimentation bin is connected to a sedimentation bin inlet pipe and a sedimentation bin outlet pipe, and the sedimentation bin inlet pipe is connected to a compressor.

7. The liquid hydrocarbon flow online monitoring device according to claim 6, characterized in that: A sampling device is also provided on the base, and the sampling device includes a deposition type sampling device, and the deposition type sampling device includes a sampling frame provided on the base, a plurality of sampling slots are provided in the sampling frame, and a sampling carrier is provided in the sampling slots.

8. The liquid hydrocarbon flow rate online monitoring device according to claim 7, characterized in that: The sampling device comprises an instant sampling device, which comprises an air extraction pipe, a suction piston is arranged in the air extraction pipe, an air inlet pipe is arranged at the bottom of the air extraction pipe, an air inlet is arranged on the air inlet pipe, a guide head is arranged at the lower end of the air inlet pipe, and a sampling sleeve is arranged outside the air inlet pipe.

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