CN115869730A - Oil gas treatment device - Google Patents

Abstract

The application provides an oil gas processing apparatus, includes: the oil gas treatment component is used for treating oil gas to obtain liquid gasoline; the liquid gasoline enters the oil-gas separator through the liquid inlet; the control valve is connected with the liquid outlet, and when the control valve is opened, the liquid gasoline in the oil-gas separator flows out of the liquid outlet; a controller for controlling at least the control valve to open and/or close. The oil gas processing apparatus of this application, oil and gas separator can automatic flowing back, and the flowing back is rapid, smooth, is favorable to improving vapor recovery's efficiency, avoids causing the damage to the membrane module of being connected with oil and gas separator.

Description

Oil gas treatment device

Technical Field

The application relates to the field of oil gas recovery, in particular to an oil gas treatment device.

Background

In the oil storage in-process at filling station, utilize cubic vapor recovery system to handle the oil gas (being the mixture of petrol and air) of exhaling in the oil storage tank, can separate out and retrieve the petrol in the oil gas, and discharge remaining clean air to the atmosphere, so not only can reduce the petrol loss, can also avoid causing the pollution in the oil gas gets into the atmosphere. When the oil gas recovery device operates for three times, gasoline obtained by oil gas treatment can enter the oil-gas separator for caching, then flows out through the liquid outlet of the oil-gas separator and returns to the oil storage tank again to achieve the purpose of recovery. Wherein, the oil-gas separator discharges liquid rapidly and smoothly at a proper time, which is beneficial to improving the recovery efficiency of the tertiary oil-gas recovery device.

Therefore, it is desirable to provide an oil gas treatment device which can control the oil gas separator to automatically drain liquid at an appropriate time, and drain liquid quickly and smoothly, thereby improving the efficiency of oil gas recovery.

Disclosure of Invention

The embodiment of the application provides an oil gas processing apparatus, includes: the oil gas treatment component is used for treating oil gas to obtain liquid gasoline; the liquid gasoline enters the oil-gas separator through the liquid inlet; the control valve is connected with the liquid outlet, and when the control valve is opened, the liquid gasoline in the oil-gas separator flows out of the liquid outlet; a controller for at least controlling the control valve to open and/or close.

In some embodiments, the controller is connected to the hydrocarbon treatment assembly and the control valve; when the oil gas recovery device is started, the controller controls the control valve to be closed; when the oil gas recovery device stops working, the controller controls the control valve to be opened.

In some embodiments, a monitoring assembly is disposed within the gas-oil separator for monitoring a level of liquid gasoline within the gas-oil separator; the controller is connected with the monitoring assembly and the control valve, and the control valve has preset opening time; when the monitoring assembly monitors that the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height, the controller controls the control valve to be opened; and when the opening time of the control valve reaches the preset opening time, the controller controls the control valve to be closed.

In some embodiments, the controller comprises a processing module, a timing module, and a counting module; when the monitoring assembly monitors that the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height, the processing module generates a control signal for controlling the control valve to be opened and sends the control signal to the control valve to enable the control valve to be in an open state, and the liquid gasoline in the oil-gas separator flows out of the liquid outlet; the timing module is used for acquiring the opening time of the control valve, the processing module is used for judging whether the opening time of the control valve reaches the preset opening time of the control valve, and if the opening time of the control valve reaches the preset opening time, the processing module generates a control signal for controlling the control valve to be closed and sends the control signal to the control valve to enable the control valve to be in a closed state; the counting module is used for acquiring the opening times of the control valve.

In some embodiments, the monitoring assembly comprises a float and a sensor for detecting the float; wherein the floating piece can float on the liquid gasoline in the oil-gas separator; when the sensor detects the floating piece, the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height.

In some embodiments, the sensor is a proximity switch and the float is constructed of a metallic material.

In some embodiments, the upper end of the oil-gas separator is provided with a cover plate, and the sensor is mounted on one side of the cover plate close to the oil-gas separator; the side, close to the oil-gas separator, of the cover plate is also provided with an installation rod, and the floating piece is connected with the installation rod in a sliding manner; when the floating piece floats on the liquid gasoline in the oil-gas separator, the floating piece can slide along the length direction of the mounting rod along with the change of the liquid level of the liquid gasoline.

In some embodiments, a cover plate is arranged at the upper end of the oil-gas separator, and a gas outlet is formed in the cover plate and used for being connected with the membrane assembly.

In some embodiments, the preset opening time of the control valve is not less than the predicted liquid discharge time of the gas-oil separator, the predicted liquid discharge time of the gas-oil separator t = V/(S · V); and V is the volume of the liquid gasoline when the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height, S is the valve port area of the control valve, and V is the speed of the liquid gasoline in the oil-gas separator when passing through the valve port of the control valve.

In some embodiments, the processing module is further configured to determine the volume of liquid gasoline recovered by the oil and gas recovery device based on the number of times the control valve is opened and the volume of liquid gasoline at which the level of gasoline in the oil and gas separator reaches a preset height.

In the oil gas processing apparatus that this application embodiment provided, open and/or close by controller control valve, can realize oil and gas separator's automatic flowing back, the condition of jam can not appear in the control valve, and the flowing back is rapid, smooth, is favorable to improving oil gas recovery's efficiency, avoids causing the damage to the membrane module.

Drawings

The following drawings describe in detail exemplary embodiments disclosed in the present application. Wherein like reference numerals refer to similar structures throughout the several views of the drawings. Those of ordinary skill in the art will understand that the present embodiments are non-limiting, exemplary embodiments and that the accompanying drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of the present application, as other embodiments may equally fulfill the inventive intent of the present application. It should be understood that the figures are not drawn to scale.

Wherein:

FIG. 1 is a schematic illustration of an oil and gas treatment device according to some embodiments herein;

FIG. 2 is a schematic illustration of a portion of an oil and gas treatment device provided in accordance with some embodiments herein;

FIG. 3 is a schematic illustration of a partial cross-sectional configuration of an oil and gas treatment device provided in accordance with some embodiments herein;

fig. 4 is a block diagram of a controller in accordance with some embodiments described herein.

Detailed Description

The following description is presented to enable any person skilled in the art to make and use the present disclosure, and is provided in the context of a particular application and its requirements. Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present application. Thus, the present application is not limited to the embodiments shown, but is to be accorded the widest scope consistent with the claims.

The tertiary oil gas recovery device is equipment for treating oil gas exhaled from an oil storage tank in the oil product storage process, the oil gas is a mixture of gasoline and air, after the oil gas is treated by the tertiary oil gas recovery device, the gasoline in the oil gas enters the oil-gas separator, then flows out from a liquid outlet on the oil-gas separator and returns to the oil storage tank again, and the rest clean air is discharged into the atmosphere. A more key process flow also exists in the process of three times of oil gas recovery, namely, the separation of gasoline (liquid state) and oil gas (gas state) in the oil-gas separator, and because the oil-gas separator is connected with the membrane component when the three times of oil gas recovery device operates, the membrane component can reprocess the oil gas in the oil-gas separator so as to separate and recover the gasoline in the oil-gas mixture. In order to achieve an ideal treatment effect, the tertiary oil-gas recovery device has better oil-gas recovery efficiency, a certain pressure (about 300-400 KPa) needs to be kept in the oil-gas separator, so that the oil-gas mixture in the oil-gas separator can enter the membrane module, and therefore a liquid outlet on the oil-gas separator needs to discharge the gasoline in the oil-gas separator at a proper time and return the gasoline to the oil storage tank again, for example, the liquid outlet is completely closed or only has a small exhaust oil discharge flow rate when the tertiary oil-gas recovery device (a component in charge of oil-gas treatment in the tertiary oil-gas recovery device, such as a compressor and the like) runs; the liquid outlet can discharge oil normally and smoothly when the tertiary oil gas recovery device does not operate; for another example, when the gasoline in the oil-gas separator reaches a certain volume, the liquid discharge port can discharge oil normally and smoothly, and when the gasoline in the oil-gas separator does not reach the certain volume, the liquid discharge port is completely closed or only has a small exhaust oil discharge flow rate.

In some embodiments, a mechanical structure flow limiting valve can be adopted to control the liquid discharging port on the oil-gas separator to discharge liquid. The air inlet of the flow limiting valve is provided with a filter screen, the flow limiting valve is internally provided with a narrow channel, when the internal pressure of the oil-gas separator reaches about 50KPa, a spring in the flow limiting valve is jacked up to close the liquid discharge port, when the three-time oil-gas recovery device stops running, the spring is reset, and gasoline in the oil-gas separator can flow out by means of the gravity of the gasoline in the oil-gas separator to finish liquid discharge action. However, because the gasoline flows out from the liquid outlet by means of the gravity of the gasoline during liquid drainage, the internal channel of the flow limiting valve is narrow, the precision required for processing the flow limiting valve is high, meanwhile, the gasoline has certain viscosity and surface tension, the situation that the gasoline is attached to the inside of the flow limiting valve and cannot be discharged can occur, the gasoline cannot be discharged for a long time and can be stored in the oil-gas separator, the gasoline is volatilized again to enter the pipeline to cause the concentration to be higher, when the gasoline is excessively accumulated, the gasoline can be filled in the oil-gas separator and even enters the membrane assembly, and the membrane assembly is damaged. In addition, when the pipeline of the tertiary oil gas recovery device is installed, the gas circuit is guaranteed to be sealed by adopting a thread sealant, related equipment (such as a compressor) in the tertiary oil gas recovery device is also sealed by adopting silicon rubber, and after the tertiary oil gas recovery device runs for a long time, the sealant can fall off, so that impurities in gasoline can be gathered at the filter screen of the flow limiting valve to block the filter screen, and the gasoline cannot be discharged through the flow limiting valve, thereby causing the problems.

The embodiment of the application provides an oil gas processing apparatus, this oil gas processing apparatus includes: oil gas processing assembly, oil and gas separator, control valve and controller. Wherein, the oil gas processing assembly is used for handling oil gas in order to obtain liquid petrol, is provided with inlet and liquid outlet on the oil gas separator, and the inlet is connected with the oil gas processing assembly, and in the liquid petrol that oil gas processing assembly handled oil gas and obtained can get into the oil gas separator through the inlet, the control valve was connected with the liquid outlet, when the control valve was opened, the liquid petrol in the oil gas separator can flow out from the liquid outlet, accomplished the flowing back action, got back to the oil storage tank again in, realized the purpose that petrol was retrieved. Oil gas provided in the application

In the treatment device, the controller can be used for controlling the control valve to be opened and/or closed, so that the oil-gas separator can be realized 5 at a proper time (for example, when the oil-gas treatment component is not operated or the oil-gas separator is closed

When the volume of the liquid gasoline in the separator reaches the preset volume), the automatic liquid drainage can be carried out, the control valve can not be blocked, and the influence on the oil-gas recovery efficiency and the oil-gas treatment device in the oil-gas separator caused by the accumulation of the gasoline in the oil-gas separator due to untimely liquid drainage or unsmooth liquid drainage can be avoided

Other components (e.g., membrane components) cause damage. In some embodiments, the oil and gas treatment 0 assembly cannot completely treat oil and gas, namely only part of the oil and gas in the oil and gas is treated into liquid

The residual oil gas and the residual oil gas still enter the oil-gas separator along with the liquid gasoline in a gas state, and the residual oil gas and the liquid gasoline are separated in the oil-gas separator due to gravity settling. It should be noted that the oil and gas referred to in this specification are not specifically described

Generally refers to a mixture of gaseous gasoline and air. It will be appreciated that the liquid gasoline referred to in this specification 5 may be pure gasoline, but in some cases, the presence of moisture in the air may result in the liquid gasoline being a mixture of gasoline and water as a result of the treatment by the hydrocarbon treatment assembly.

The oil and gas treatment device provided by the embodiment of the application will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic illustration of an oil and gas treatment device according to some embodiments of the present disclosure

Figure (a). FIG. 2 is a schematic illustration of a portion of an oil and gas treatment device provided in accordance with some embodiments herein. FIG. 3 is a schematic illustration of a partial cross-sectional structure of an oil and gas treatment device provided in accordance with some embodiments herein. Wherein the arrows in fig. 1 may indicate connections between different structures

The arrow direction may indicate the flow direction of the oil and gas and/or the liquid gasoline. The oil storage tank 2005 can be an oil storage tank for storing gasoline in a gas station, and the oil and gas processing device provided by the embodiment of the application

The device 100 can process oil gas generated in the oil storage tank 200 so as to recover gasoline in the oil gas, thereby bringing economic benefits to gas stations.

As shown in fig. 1, the hydrocarbon treatment device 100 may include a hydrocarbon treatment assembly 110, a gas-oil separator 120, a control valve 130, and a controller 140.

The hydrocarbon treatment assembly 110 may be used to treat hydrocarbons to obtain liquid gasoline. In some embodiments, the oil gas treatment assembly 110 may include a compression device 111 and a cooling device 112, when the oil gas treatment assembly 110 is started (or referred to as working), that is, when the compression device 111 and/or the cooling device 112 are working, the compression device 111 (e.g., a compressor) may suck oil gas from the oil storage tank 200, the compression device 111 may process the oil gas to obtain high-temperature and high-pressure oil gas, and the cooling device 112 may perform incomplete cooling processing on the high-temperature and high-pressure oil gas, that is, part of the oil gas is cooled to liquid gasoline, and the rest of the oil gas also remains in a gaseous state. In some embodiments, the cooling device 112 may be air-cooled (e.g., a radiator fan) or water-cooled (e.g., a water-cooled tube). It should be noted that the structure of the oil and gas treatment assembly 110 and the way of the oil and gas treatment assembly 110 treating the oil and gas to obtain the liquid gasoline are only examples, and the present application is not intended to be limited thereto, and any structure and way of treating the oil and gas to obtain the liquid gasoline should be within the protection scope of the present application.

Liquid gasoline obtained after the oil gas is treated by the oil gas treatment component 110 and the residual oil gas can enter the oil-gas separator 120. In some embodiments, the liquid inlet 121 and the liquid outlet 122 may be disposed on the oil-gas separator 120, the liquid inlet 121 may be connected to the oil-gas treatment assembly 110 (the cooling device 112), and the liquid gasoline obtained through the cooling treatment by the cooling device 112 and the remaining oil-gas may enter the oil-gas separator 120 through the liquid inlet 121. The liquid gasoline and the residual oil gas can be separated in the oil-gas separator 120 due to gravity settling, that is, the residual oil gas is distributed above the liquid gasoline, and the liquid gasoline can flow out from the liquid outlet 122 under the action of the gravity of the liquid gasoline and finally returns to the oil storage tank 200 again, so that the gasoline recovery in the true sense is realized. In some embodiments, in order to treat the remaining oil gas to recover the gasoline therein, the oil-gas separator 120 may further be connected with a membrane module 150, the remaining oil gas in the oil-gas separator 120 may enter the membrane module 150 through the action of the pressure difference, and the membrane module 150 may treat the remaining oil gas to recover the gasoline therein. Further description of the membrane assembly 150 may be found elsewhere in this specification (e.g., fig. 3 and its associated description), and will not be redundantly described here.

In some embodiments, the liquid inlet 121 may be disposed on a side surface of the oil separator 120, and may also be disposed at an upper end or a lower end of the oil separator 120. In some embodiments, the liquid outlet 122 may be disposed at the lower end of the gas-oil separator 120 (or referred to as the bottom of the gas-oil separator 120), so as to facilitate the liquid gasoline in the gas-oil separator 120 to be discharged from the liquid outlet 122 under the action of its own weight. In some embodiments, the liquid outlet 122 may also be disposed at other positions (e.g., the upper end, the side surface, etc.) of the gas-oil separator 120, and the liquid gasoline may be extracted from the gas-oil separator 120 by additionally disposing a negative pressure device (e.g., a vacuum pump, an oil pump, etc.) in connection with the liquid outlet 122. It is understood that the liquid inlet 121 and the liquid outlet 122 referred to in the present specification may refer to an opening provided on the gas-oil separator 120, a pipe communicating with the inside of the gas-oil separator 120, or a combination of the two. Illustratively, the oil and gas treatment assembly 110 may be in communication with the inlet port 121 via tubing, and the outlet port 122 may be in communication with a control valve 130, described below.

The control valve 130 can be connected with the liquid outlet 122, the opening or closing of the control valve 130 can control the liquid gasoline in the oil-gas separator 120 to flow out of the liquid outlet 122, the automatic liquid drainage of the oil-gas separator 120 can be realized by controlling the opening or closing of the control valve 130, the control valve 130 cannot be blocked, the liquid drainage is rapid, the oil-gas recovery efficiency can be improved, and meanwhile, the condition that the membrane module 150 is damaged because the liquid gasoline is stored in the oil-gas separator 120 and enters the membrane module 150 is avoided. In some embodiments, as shown in fig. 2, one end of the control valve 130 and the liquid outlet 122 may communicate through a first clamp 160, and by using a clamp connection, a quick connection between the liquid outlet 122 and the control valve 130 may be achieved, and the connection is reliable and has good sealing performance. In some embodiments, one end of the control valve 130 may be connected to the liquid outlet 122 by gluing, clamping, screwing, or the like. In some embodiments, the control valve 130 may be a solenoid valve or an electrically operated valve.

The controller 140 may be used at least to control the control valve 130 to open and/or close.

In some embodiments, the control valve 130 may be opened or closed under the control of the controller 140. In some embodiments, the controller 140 may control the control valve 130 to open and/or close based on the operating state of the hydrocarbon treatment assembly 110 (compression device 111 and/or cooling device 112). Further, the controller 140 may be connected to the oil gas treatment assembly 110 and the control valve 130, when the oil gas treatment assembly 110 is started (starts to work), the controller 140 may control the control valve 130 to close, and at this time, the liquid gasoline in the oil-gas separator 120 cannot flow out from the liquid outlet 122; when the oil gas treatment assembly 110 stops working, the controller 140 can control the control valve 130 to open, and at this time, the liquid gasoline in the gas-oil separator 120 can flow out from the liquid outlet 122 to start the liquid discharging action. Wherein the control valve 130 may be a normally open control valve (i.e., the control valve 130 is in an open state when not energized). Illustratively, when hydrocarbon treatment assembly 110 needs to be started, controller 140 may provide a voltage of 24V to the solid state relay connected to hydrocarbon treatment assembly 110, causing the solid state relay to operate to provide a voltage of 380V to the motor in hydrocarbon treatment assembly 110, causing hydrocarbon treatment assembly 110 to start, while control valve 130 is connected to the same solid state relay as hydrocarbon treatment assembly 110, and 380V is also provided to the control valve. The 380V voltage is three-phase power, the control valve adopts 220V voltage, and the three lines are respectively a 220V positive line, a 220V negative line and a grounding line. The 220V positive is connected with any one phase of three-phase power, the 220V negative is connected with the N line, and the ground wire is connected with the ground wire of the explosion-proof box. When the controller 140 controls the solid-state relay to provide 380V voltage, the oil and gas processing assembly 110 is started, three phases are connected electrically, and the control valve 130 is closed; when the controller 140 controls the solid state relay to stop providing 380V voltage, the oil and gas processing assembly 110 stops working, the three-phase power is cut off, and the control valve 130 is opened. The controller 140 controls the control valve 130 to open and/or close based on the start and stop of the oil-gas processing assembly 110, so that the automatic liquid discharge of the oil-gas separator 120 can be realized, the situation that the control valve 130 is blocked is not needed to be worried about, the liquid gasoline in the oil-gas separator 120 can rapidly and smoothly flow out from the liquid outlet 122, the oil-gas recovery efficiency can be improved, and the cost is low.

In some embodiments, the controller 140 can also control the control valve 130 to open based on the volume of liquid gasoline in the oil separator 120 reaching a preset value, so that the gasoline in the oil separator 120 can flow out from the liquid outlet 122 (referred to as liquid discharge of the oil separator 120 for short). Wherein the control valve 130 may have a preset opening time, the controller 140 may control the control valve to be closed based on the opening time of the control valve 130 reaching the preset opening time.

The controller controls the control valve 130 to be opened based on the volume of the liquid gasoline in the oil-gas separator 120 reaching a preset value and controls the control valve 130 to be closed based on the opening time of the control valve 130 reaching a preset opening time, so that not only can automatic liquid drainage of the oil-gas separator 120 be realized, but also the volume of the gasoline recovered by the oil-gas treatment device 100 (the volume of the liquid gasoline flowing back into the oil storage tank 200 from the liquid outlet 122) can be measured, and the method has high accuracy, so that the economic benefit brought to the oil station by the oil-gas treatment device 100 can be calculated based on the volume of the recovered liquid gasoline.

Further, during the period from the opening to the closing of the control valve 130, the volume of the gasoline flowing out from the liquid outlet 122 is equal to the preset value. When the volume of the gasoline recovered by the oil-gas recovery device entering the oil-gas separator 120 reaches the preset value again, the controller controls the control valve 130 to repeat the operation, the liquid drainage times of the oil-gas separator 120 can be obtained by recording the opening times of the control valve 130, and the gasoline volume of the oil-gas recovery device can be obtained by multiplying the liquid drainage times by the preset value, so that the purpose of metering the gasoline recovered by the oil-gas recovery device is realized. In some embodiments, the controller may be a single chip, a PLC controller, or the like. Further description of the controller 140 may be found elsewhere in this specification (e.g., fig. 4 and its associated description), and will not be described here too much. It should be noted that the opening time of the control valve 130 refers to a timing time for each opening of the control valve 130.

In some embodiments, as shown in FIG. 3, whether the volume of liquid gasoline in the gas-oil separator 120 reaches a preset value may be determined by a monitoring assembly 170 disposed in the gas-oil separator 120, and the controller 140 may be connected to the monitoring assembly 170 and the control valve 130. When the monitoring component 170 monitors that the volume of the liquid gasoline in the gas-oil separator 120 reaches a preset value, a corresponding detection signal is sent to the controller 140, and the controller 140 may generate a control signal for controlling the control valve 130 to be opened based on the received detection signal and send the control signal to the control valve 130 so that the control valve 130 is opened. In some embodiments, the monitoring component 170 may determine whether the volume of liquid gasoline in the gas-oil separator 120 reaches a preset value by monitoring the liquid gasoline level in the gas-oil separator 120, that is, when the liquid gasoline level in the gas-oil separator 120 reaches a preset height, the volume of gasoline in the gas-oil separator 120 reaches the preset value. The height of the gasoline level in the oil-gas separator 120 may refer to a distance between the liquid gasoline level in the oil-gas separator 120 and the bottom surface inside the oil-gas separator 120.

In some embodiments, as shown in fig. 3, the monitoring assembly 170 may include a float 171 and a sensor 172 for detecting the float 171. Wherein, the floating member 171 can float on the liquid gasoline in the oil-gas separator 120, and the position of the floating member 171 can be used for reflecting the liquid gasoline level in the oil-gas separator 120. When the sensor 172 detects the floating member 171, or the floating member 171 enters the detection range of the sensor 172, the liquid level of the liquid gasoline in the oil-gas separator 120 reaches a preset height, at this time, the sensor 172 may send a detection signal corresponding to the liquid level of the liquid gasoline in the oil-gas separator 120 reaching the preset height to the controller, and the controller may generate a control signal for controlling the control valve 130 to be opened based on the received detection signal and send the control signal to the control valve 130 so that the control valve 130 is opened.

In some embodiments, the sensor 172 may be a proximity switch, and the float member 171 may be made of a metal material such as iron, aluminum, or the like, in order to ensure that the float member 171 can be detected by the proximity switch. In some embodiments, the proximity switch may include a passive proximity switch, a vortex proximity switch, a hall proximity switch, a capacitive proximity switch, an electro-optical proximity switch, or the like. The proximity switch is cheap, the cost pressure for metering the gasoline recovered by the oil-gas recovery device can be reduced, the liquid level of the liquid gasoline in the oil-gas separator 120 is monitored by detecting the position of the floating piece 171 through the proximity switch, and high precision can be achieved. In this embodiment, in order to ensure that the floating member 171 can float on gasoline, the floating member 171 is preferably made of a metal material (e.g., aluminum) having a relatively low density. In some embodiments, the float member 171 may be provided in a hollow structure so that the float member 171 can float on gasoline. In some embodiments, the overall shape of the float member 171 may be a sphere, cylinder, cube, or other regular or irregular shape. In some embodiments, the float 171 may also be a sheet-like structure.

In some embodiments, the monitoring assembly 170 may be replaced with a liquid level sensor, which can directly measure the gasoline level without an additional float. Specifically, the liquid level sensor may be based on the principle that the gasoline static pressure in the oil-gas separator 120 is proportional to the gasoline liquid level height, and an isolated diffused silicon sensor or a ceramic capacitance pressure sensor is used to convert the static pressure into an electrical signal, and then the electrical signal is converted into a standard electrical signal (generally 4 to 20mA/1 to 5 VDC) through temperature compensation and linear correction. In some embodiments, the liquid level sensor may include a float level sensor, a ball level sensor, a static pressure level sensor.

In some embodiments, continuing to refer to fig. 3, the upper end of the oil separator 120 may be provided with a cover plate 180, i.e., the upper end of the oil separator 120 has an opening, and the cover plate 180 is connected with the opening to close the opening. In some embodiments, the cover plate 180 may be connected to the upper opening of the oil separator 120 by a second clamp 181, and by means of the clamp connection, the cover plate 180 may be stably connected to the upper opening of the oil separator 120, and good sealing performance may be ensured. Further, the gasket in the second clamp 181 may be a teflon gasket to ensure a good sealing effect between the cover plate 180 and the upper opening of the oil-gas separator 120. In some embodiments, the cover plate 180 and the upper opening of the oil-gas separator 120 may be connected by screwing, clamping, gluing, or the like. By detachably connecting the cover plate 180 to the upper end opening of the oil separator 120, it is possible to facilitate the installation of the monitoring assembly 170 inside the oil separator 120.

In some embodiments, the sensor 172 may be mounted to a side of the cover plate 180 adjacent to the oil separator 120. As an exemplary illustration, the cover plate 180 is opened with a mounting hole, the sensor 172 can be mounted on one side of the cover plate 180 close to the oil separator 120 through the mounting hole, and the mounting surfaces of the sensor 172 and the cover plate 180 can be fixed with the cover plate 180 by means of threaded connection (i.e. screw and nut), and are sealed by using threaded glue, so as to ensure the tightness inside the oil separator 120. Meanwhile, a mounting rod 190 may be further disposed on one side of the cover plate 180 close to the oil-gas separator 120, the floating member 171 may be slidably connected to the mounting rod 190, and when the floating member 171 floats on the liquid gasoline in the oil-gas separator 120, the floating member 171 may slide along the length direction of the mounting rod 190 along with the change of the liquid level of the gasoline. Wherein, the length direction of the installation rod 190 is parallel to the liquid level change (ascending or descending) direction of the liquid gasoline in the oil separator 120. Illustratively, the float member 171 has mounting holes (not shown) extending through the float member 171 through which mounting rods 190 may be passed for sliding connection with the float member 171. Wherein, the mounting rod 190 is provided with a limiting portion 191 at one end away from the cover plate 180, and the diameter of the limiting portion 191 can be larger than the aperture of the mounting hole of the floating member 171, so as to prevent the floating member 171 from falling off from the mounting rod 190. In some embodiments, the diameter of the mounting hole may be slightly smaller than the diameter of the mounting rod 190. In some embodiments, the difference ratio between the aperture of the mounting hole and the diameter of the mounting rod 190 may be between 1% and 5%, so as to ensure that the floating member 171 can slide smoothly along the length direction of the mounting rod 190, and avoid the situation that the floating ball tilts during the sliding process due to an excessively large gap between the mounting rod 190 and the mounting hole, thereby affecting the detection accuracy of the sensor.

In some embodiments, the cover plate 180 may further have a gas outlet 182, and the gas outlet 182 may be used to connect the membrane assembly 150, so as to treat the oil gas in the oil-gas separator 120 to recover the gasoline therein. Further, the membrane module 150 may be communicated with the inside of the gas-oil separator 120 through the air outlet 182, the oil gas in the gas-oil separator 120 may enter the membrane module 150 under the action of the pressure difference, the membrane module 150 may separate the oil gas into gasoline and air, the gasoline is recovered to the oil storage tank 200, and the air is discharged to the atmosphere. As an exemplary description, the membrane module may include a membrane shell and a membrane core located in the membrane shell, where the membrane core is a polymer membrane, the polymer membrane has a preferential permeability to gasoline, when oil gas enters a gap between the membrane shell and the membrane core in the membrane module, gasoline or super-saturated oil gas in the oil gas may permeate from an outer side of the polymer membrane to an inner side of the polymer membrane to enter the membrane core, the membrane core may be connected to a vacuum pump, the super-saturated oil gas and gasoline in the membrane core may be pumped back into the oil storage tank 200 by the vacuum pump, and air in the oil gas may be repelled by a surface of the polymer membrane to continue to remain in the gap between the membrane shell and the membrane core, and the gap between the membrane shell and the membrane core is communicated with the external atmosphere to discharge the air to the atmosphere.

The controller in the embodiments of the present specification will be described in detail with reference to the accompanying drawings.

FIG. 4 is a block diagram of a controller according to some embodiments of the present description.

In some embodiments, the controller 140 may include a processing module 141, a timing module 142, and a counting module 143.

The processing module 141 may be used to control the control valve 130 to open. Specifically, when the monitoring component 170 monitors that the liquid level of the liquid gasoline in the oil separator 120 reaches the preset height, the monitoring component 170 may send a detection signal related to the liquid level of the liquid gasoline in the oil separator 120 reaching the preset height to the processing module 141, and the processing module 141 may generate a control signal for controlling the control valve 130 to open based on the detection signal and send the control signal to the control valve 130 to open the control valve 130, so that the liquid gasoline in the oil separator 120 may flow out from the liquid outlet.

The timing module 142 may be used to obtain the open time of the control valve 130, i.e., the timing module 142 may count from when the control valve 130 is open. In some embodiments, the processing module 141 may further determine whether the opening time of the control valve reaches a preset opening time of the control valve 130, and if so, the processing module 141 may generate a control signal for controlling the control valve 130 to close and send the control signal to the control valve 130 to close the control valve 130. When the processing module 141 controls the control valve 130 to open and close once, the oil-gas separator 120 completes one-time liquid discharge, and the volume of the gasoline discharged once by the oil-gas separator 120 is the volume of the gasoline when the liquid level of the gasoline in the oil-gas separator 120 reaches the preset height. In some embodiments, the preset opening time of the control valve 130 should be no less than the expected drain time of the gas-oil separator 120. The predicted liquid discharge time of the oil-gas separator 120 may refer to a predicted time required for the gasoline to completely flow out of the liquid outlet 122 when the gasoline level in the oil-gas separator 120 reaches a preset height. By setting the preset opening time of the control valve 130 to be not less than the expected liquid drainage time of the oil-gas separator 120, it is ensured that all gasoline in the oil-gas separator 120 can flow out from the liquid outlet 122 during the opening period of the control valve 130, so that the gasoline volume of the primary liquid drainage of the oil-gas separator 120 is just the gasoline volume when the gasoline liquid level in the oil-gas separator 120 reaches the preset height, and a large error is avoided when the gasoline volume recovered by the oil-gas treatment device 100 is counted finally. In some embodiments, the expected drain time of the oil separator 120 may be determined by equation (1):

t＝V/(S·v) (1)

wherein t is the predicted liquid discharge time of the oil-gas separator 120, V is the volume of the liquid gasoline when the liquid level of the liquid gasoline in the oil-gas separator 120 reaches the preset height, S is the valve port area of the control valve 130, and V is the rate of the liquid gasoline in the oil-gas separator 120 passing through the valve port of the control valve 130.

In some embodiments, the velocity v of the gasoline in the gas-oil separator 120 when passing through the valve port of the control valve 130 can be determined by equation (2):

wherein g is the gravitational acceleration and h is the preset height of the gasoline level in the oil-gas separator 120.

In some embodiments, since gasoline has viscosity and friction during flowing, the total flowing time from the liquid outlet 122 when the gasoline level in the gas-oil separator 120 reaches a preset height is longer than the expected liquid discharge time of the gas-oil separator 120, and the preset opening time of the control valve 130 should be longer than the expected liquid discharge time of the gas-oil separator 120 in order to ensure that the gasoline can be completely discharged.

The counting module 143 may be used to obtain the number of times the control valve 130 is opened, i.e., each time the control valve 130 is opened, the count module 143 may record the number of times. The number of times of opening the control valve 130 is recorded by the counting module 143, so that the liquid discharge number of the oil-gas separator 120 can be obtained, and since the volume of the gasoline discharged by the oil-gas separator 120 each time is determined (i.e., the volume of the gasoline when the gasoline level in the oil-gas separator 120 reaches the preset height), in some embodiments, the processing module 141 may determine the total liquid discharge volume of the oil-gas separator 120 (i.e., the product of the liquid discharge number of the oil-gas separator 120 and the volume of the gasoline when the gasoline level in the oil-gas separator reaches the preset height) based on the liquid discharge number of the oil-gas separator 120 and the volume of the gasoline when the gasoline level in the oil-gas separator reaches the preset height, where the total liquid discharge volume of the oil-gas separator 120 is the volume of the gasoline recovered by the oil-gas recovery device.

In some embodiments, the controller 140 may further include a display module (not shown), which may be used to display the number of times the control valve 130 is opened, the volume of gasoline recovered by the vapor recovery device, and the like.

In some embodiments, the controller 140 may be connected to the monitoring assembly 170 and the control valve 130 by a wired or wireless connection, which is not limited in this application. Further, the controller 140 may further include a signal transmitting and receiving module (not shown), and the signal transmitting and receiving module may be configured to receive a detection signal related to the gasoline level in the gas-oil separator 120 reaching a preset height, which is transmitted by the monitoring assembly 170, and transmit a control signal for controlling the control valve 130 to be opened and closed to the control valve.

It should be noted that the above description of the modules of the controller 140 is only for convenience of description and does not limit the present application to the scope of the illustrated embodiments, and it is understood that, after understanding the principle of the controller 140, a person skilled in the art can arbitrarily combine the modules without departing from the principle. In some embodiments, the processing module 141, the timing module 142 and the counting module 143 in the controller 140 may be different modules, or may be a module that implements the functions of two or more modules. For example, the processing module 141 may implement the functions of the timing module 142 and the counting module 143. Such variations are within the scope of the present application.

The beneficial effects that may be brought by the embodiments of the present application include, but are not limited to: (1) In the oil-gas treatment device provided by the embodiment of the application, the controller is used for controlling the control valve to be opened or closed so as to control the oil-gas separator to automatically drain liquid, the control valve cannot be blocked, the liquid drainage is rapid and smooth, the oil-gas recovery efficiency is improved, and the damage of a membrane component is avoided; (2) The controller controls the control valve to be opened when monitoring that the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height based on the monitoring assembly and controls the control valve to be closed when the opening time of the control valve reaches a preset opening time based on the monitoring assembly, so that not only can automatic liquid drainage of the oil-gas separator be realized, but also the volume of the gasoline recovered by the oil-gas treatment device can be measured, and the economic benefit of the oil-gas treatment device for an oil station can be calculated based on the volume of the recovered gasoline; (3) The monitoring assembly has low cost and high detection precision, can effectively reduce the cost pressure when the volume of the gasoline recovered by the oil gas recovery device is measured, and improves the accuracy of measurement; (4) The oil-gas separator in the oil-gas treatment device provided by the embodiment of the application is also connected with a membrane group, so that oil gas in the oil-gas separator can be treated to recover gasoline in the oil-gas separator, and the oil-gas recovery efficiency of the oil-gas treatment device is facilitated; (5) The cover plate is connected with the opening at the upper end of the oil-gas separator and the liquid outlet is connected with the control valve through the clamping hoop, so that the connection is reliable, and the sealing effect is good; (6) The preset opening time of the control valve is not less than the predicted liquid drainage time of the oil-gas separator, so that the gasoline in the oil-gas separator can completely flow out of the liquid outlet when reaching the preset height, a large error is avoided when the volume of the gasoline recovered by the oil-gas treatment device is finally counted, and the metering accuracy of the volume of the gasoline recovered by the oil-gas treatment device is ensured.

It is to be noted that different embodiments may produce different advantages, and in different embodiments, any one or combination of the above advantages may be produced, or any other advantages may be obtained.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be regarded as illustrative only and not as limiting the present specification. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, though not expressly described herein. Such modifications, improvements and adaptations are proposed in the present specification and thus fall within the spirit and scope of the exemplary embodiments of the present application.

It should be noted that, in the description of the present application, unless specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; can be in a rotating connection or a sliding connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood in conjunction with the specific situation for a person of ordinary skill in the art.

In addition, when terms such as "first," "second," "third," etc., are used in this specification to describe various features, these terms are used merely to distinguish one feature from another, and are not to be construed as indicating or implying any relationship, relative importance, or implied indication of the number of features indicated.

In addition, the present specification describes example embodiments with reference to idealized example cross-sectional and/or plan and/or perspective views. Thus, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, example embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

Also, the present application uses specific words to describe embodiments of the specification. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this application are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to imply that more features are required than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations are also possible within the scope of the present application. Thus, by way of example, and not limitation, alternative configurations of the embodiments of the present application can be viewed as being consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to only those embodiments explicitly described and depicted herein.

Claims (10)

1. An oil and gas treatment device, comprising:

the oil gas treatment component is used for treating oil gas to obtain liquid gasoline;

the liquid gasoline enters the oil-gas separator through the liquid inlet;

the control valve is connected with the liquid outlet, and when the control valve is opened, the liquid gasoline in the oil-gas separator flows out of the liquid outlet;

a controller at least for controlling the control valve to open and/or close.

2. The oil and gas treatment device according to claim 1, wherein said controller is connected to said oil and gas treatment assembly and said control valve; wherein,

when the oil gas recovery device is started, the controller controls the control valve to be closed;

when the oil gas recovery device stops working, the controller controls the control valve to be opened.

3. The oil and gas treatment device according to claim 1, wherein a monitoring assembly is arranged in the oil and gas separator and used for monitoring the liquid gasoline level in the oil and gas separator; the controller is connected with the monitoring assembly and the control valve, and the control valve has a preset opening time; wherein,

when the monitoring assembly monitors that the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height, the controller controls the control valve to be opened;

and when the opening time of the control valve reaches the preset opening time, the controller controls the control valve to be closed.

4. The hydrocarbon processing apparatus of claim 3, wherein the controller includes a processing module, a timing module, and a counting module; wherein,

when the monitoring assembly monitors that the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height, the processing module generates a control signal for controlling the control valve to be opened and sends the control signal to the control valve to enable the control valve to be in an open state, and the liquid gasoline in the oil-gas separator flows out of the liquid outlet;

the timing module is used for acquiring the opening time of the control valve, the processing module is used for judging whether the opening time of the control valve reaches the preset opening time of the control valve, and if the opening time of the control valve reaches the preset opening time, the processing module generates a control signal for controlling the control valve to be closed and sends the control signal to the control valve to enable the control valve to be in a closed state;

the counting module is used for acquiring the opening times of the control valve.

5. The oil and gas treatment device according to claim 3, wherein said monitoring assembly comprises a float and a sensor for detecting said float; wherein the floating piece can float on the liquid gasoline in the oil-gas separator; when the sensor detects the floating piece, the gasoline liquid level in the oil-gas separator reaches a preset height.

6. The oil and gas treatment device according to claim 5, wherein said sensor is a proximity switch and said float is constructed of a metallic material.

7. The oil and gas treatment device as claimed in claim 5, wherein a cover plate is arranged at the upper end of the oil-gas separator, and the sensor is mounted on one side of the cover plate close to the oil-gas separator; the side, close to the oil-gas separator, of the cover plate is also provided with an installation rod, and the floating piece is connected with the installation rod in a sliding manner; when the floating piece floats on the gasoline in the oil-gas separator, the floating piece can slide along the length direction of the mounting rod along with the change of the liquid level of the liquid gasoline.

8. The oil and gas treatment device according to claim 2 or 3, wherein a cover plate is arranged at the upper end of the oil-gas separator, and a gas outlet is formed in the cover plate and used for connecting the membrane assembly.

9. The oil and gas treatment device according to claim 3, wherein the preset opening time of the control valve is not less than the predicted liquid discharge time of the oil and gas separator, and the predicted liquid discharge time of the oil and gas separator t = V/(S-V); and V is the volume of the liquid gasoline when the liquid level of the liquid gasoline in the oil-gas separator reaches a preset height, S is the valve port area of the control valve, and V is the speed of the liquid gasoline in the oil-gas separator when passing through the valve port of the control valve.

10. The oil and gas treatment device according to claim 4, wherein the processing module is further configured to determine the volume of liquid gasoline recovered by the oil and gas recovery device based on the number of times the control valve is opened and the volume of liquid gasoline at which the liquid level of liquid gasoline in the oil and gas separator reaches a preset height.

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