On-line monitoring system for oil gas recovery of oil tank truck

Abstract

The utility model discloses an oil tank truck oil gas recovery on-line monitoring system which comprises a manhole cover, a vent valve, an oil gas recovery valve and an emergency cut-off valve, the manhole cover is arranged on a tank body, and a temperature sensor and a pressure sensor are arranged on the manhole cover; the vent valve is connected with a gas phase pipeline of the tank body, and is provided with a first on-off state monitoring sensor and a VOCs concentration real-time monitoring sensor; the oil gas recovery valve is arranged on the manhole cover, and a second opening and closing state monitoring sensor is arranged on the oil gas recovery valve; the emergency cut-off valve is arranged on the tank body, and a third on-off state monitoring sensor is arranged on the emergency cut-off valve. The online monitoring system is adopted, oil and gas leakage at any moment in the starting state of the oil tank truck can be monitored, detection is complementary with standing state detection, and all-time oil and gas leakage detection is achieved; oil and gas leakage in the transportation process is effectively controlled, closed transportation and recovery of oil and gas are guaranteed, and VOCs leakage or disordered emission is restrained.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of oil and gas recovery, in particular to an online monitoring system for oil and gas recovery of tank trucks. BACKGROUND

[0002] Gasoline is a mixture of various hydrocarbons, and has strong volatility. During storage and transportation, light component oil and gas, i.e. volatile organic compounds (VOCs), are easily volatilized. VOCs refer to organic compounds that participate in atmospheric photochemical reactions, or are determined by measurement or accounting according to a specified method. Strongly active VOCs can react with NOx under certain conditions to cause an increase in the concentration of surface ozone (O3), forming photochemical smog, and can also react with some free radicals in the atmosphere to form secondary organic aerosols. VOCs are important precursors of fine particulate matter (PM2.5) and O3 pollution, and the key to improving atmospheric environmental quality is to control VOCs.

[0003] At present, existing research on oil and gas recovery of tank trucks still remains in the detection stage, which is the detection of the overall sealing performance of the tank body when the tank truck is in a stationary and empty state, and cannot monitor the oil and gas leakage caused by accidental opening of the valve due to jolting, sudden braking and the like during transportation. CONTENT OF THE INVENTION

[0004] The present application provides an online monitoring system for oil and gas recovery of tank trucks to solve the problem that real-time monitoring of oil and gas leakage during transportation is not possible in the prior art, and to achieve monitoring of oil and gas leakage of tank trucks at all times, effectively inhibiting the leakage or disordered emission of VOCs.

[0005] The present application provides an online monitoring system for oil and gas recovery of tank trucks, comprising:

[0006] A manhole cover is arranged on the tank body, and a temperature sensor and a pressure sensor are arranged thereon;

[0007] A breather valve is connected to the gas phase pipeline of the tank body, and a first opening and closing state monitoring sensor and a VOCs concentration real-time monitoring sensor are arranged thereon;

[0008] An oil and gas recovery valve is arranged on the manhole cover, and a second opening and closing state monitoring sensor is arranged thereon;

[0009] An emergency shut-off valve is arranged on the tank body, and a third opening and closing state monitoring sensor is arranged thereon;

[0010] A master control screen and a master controller, the master controller is used for collecting signals transmitted by the temperature sensor, the pressure sensor, the first opening and closing state monitoring sensor, the VOCs concentration real-time monitoring sensor, the second opening and closing state monitoring sensor and the third opening and closing state monitoring sensor of the terminal controller, and displaying on the master control screen.

[0011] In the oil tank truck oil gas recovery online monitoring system provided by the at least one embodiment of the present disclosure, the temperature sensor and the pressure sensor on the manhole cover are installed through a reserved hole.

[0012] In the oil tank truck oil gas recovery online monitoring system provided by the at least one embodiment of the present disclosure, the first opening and closing state monitoring sensor and the VOCs concentration real-time monitoring sensor of the breather valve are respectively installed above and on the side of a fixing seat installed on the valve body shell of the breather valve, a signal feedback source first magnet matched with the first opening and closing state monitoring sensor and the VOCs concentration real-time monitoring sensor is installed on the movable valve rod of the breather valve, and the inductive effect is realized by the distance of the movement of the first magnet.

[0013] In the oil tank truck oil gas recovery online monitoring system provided by the at least one embodiment of the present disclosure, the second opening and closing state monitoring sensor is fixedly installed inside a small valve cover on the top of the valve body of the oil gas recovery valve, and a signal feedback source second magnet matched with the second opening and closing state monitoring sensor is installed on the movable valve rod of the oil gas recovery valve, and the inductive effect is realized by the distance of the movement of the second magnet.

[0014] In the oil tank truck oil gas recovery online monitoring system provided by the at least one embodiment of the present disclosure, the third opening and closing state monitoring sensor is fixedly installed inside the middle cover of the emergency cut-off valve, and a signal feedback source third magnet matched with the third opening and closing state monitoring sensor is installed on the movable valve rod of the emergency cut-off valve, and the inductive effect is realized by the distance of the movement of the third magnet.

[0015] In the oil tank truck oil gas recovery online monitoring system provided by the at least one embodiment of the present disclosure, the master control screen is provided with an Internet of Things interface and a maintenance interface.

[0016] The one or more technical solutions provided in the embodiments of the present disclosure have at least the following technical effects or advantages:

[0017] 1. The utility model discloses an online monitoring system, through the real -time monitoring of temperature sensor, pressure sensor and the real -time monitoring of VOCs concentration real -time monitoring sensor on the manhole cover, the oil tank truck starting state oil gas leakage of any time can be monitored, and the static state detection is complementary, realizes the oil gas leakage detection of all time period, effectively controls the oil gas leakage in the transportation process, guarantees oil gas closed transportation recovery, restrains VOCs leakage or disorderly discharge.

[0018] 2, the main control screen reserves the internet of things interface, can realize the platform real -time monitoring, provides technical support for ecological environment department. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is oil tank truck oil gas recovery device structure diagram in the embodiment of the application;

[0020] Figure 2 It is oil tank truck oil gas recovery device front view in the embodiment of the application;

[0021] Figure 3 It is oil tank truck oil gas recovery device side view in the embodiment of the application;

[0022] Figure 4a It is oil tank truck oil gas recovery device manhole cover plan view in the embodiment of the application;

[0023] Figure 4b It is oil tank truck oil gas recovery device manhole cover side view in the embodiment of the application;

[0024] Figure 5a It is oil tank truck oil gas recovery device breather valve schematic view in the embodiment of the application;

[0025] Figure 5b It is oil tank truck oil gas recovery device breather valve section view in the embodiment of the application;

[0026] Figure 6a It is oil tank truck oil gas recovery device oil gas recovery valve schematic view in the embodiment of the application;

[0027] Figure 6b It is oil tank truck oil gas recovery device oil gas recovery valve section view in the embodiment of the application;

[0028] Figure 7a It is oil tank truck oil gas recovery device emergency stop valve schematic view in the embodiment of the application;

[0029] Figure 7b It is oil tank truck oil gas recovery device emergency stop valve section view in the embodiment of the application. DETAILED DESCRIPTION

[0030] This application provides an online monitoring system for oil and gas recovery in tank trucks to solve the problem that existing technologies cannot monitor oil and gas leaks during transportation in real time, thereby enabling real-time monitoring of oil and gas leaks in tank trucks and effectively suppressing VOCs leakage or disorderly emissions.

[0031] The technical solution in this application embodiment is to solve the aforementioned crosstalk problem, and the overall approach is as follows:

[0032] By configuring temperature and pressure sensors on manhole cover 5, a first open / closed status monitoring sensor and a VOCs concentration real-time monitoring sensor on vent valve 2, a second open / closed status monitoring sensor on oil and gas recovery valve 3, and a third open / closed status monitoring sensor on emergency shut-off valve 7, an online monitoring system is formed to ensure the detection of oil and gas leaks in tank trucks at all times.

[0033] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0034] Example 1

[0035] like Figure 1 As shown, the oil tanker oil vapor recovery device in this embodiment includes a tank body 1, a vent valve 2, an oil vapor recovery valve 3, an overflow prevention probe 4, a manhole cover 5, an overflow prevention socket 6, an emergency shut-off valve 7, a drain valve 8, an oil vapor recovery connector 9, a power switch 10, a main control panel 11, an air compressor 12, and a main control system 13.

[0036] The manhole cover 5 is installed on the tank body 1, and a temperature sensor and a pressure sensor are installed on it.

[0037] The vent valve 2 is connected to the gas phase pipeline of the tank 1, and is equipped with a first opening and closing status monitoring sensor and a VOCs concentration real-time monitoring sensor.

[0038] The oil and gas recovery valve 3 is installed on the manhole cover 5, and a second opening and closing status monitoring sensor is configured on it.

[0039] The emergency shut-off valve 7 is installed on the tank body 1, and a third opening and closing status monitoring sensor is configured on it.

[0040] The main controller is used to integrate the terminal controller to collect signals transmitted by the temperature sensor, pressure sensor, first open / closed state monitoring sensor, VOCs concentration real-time monitoring sensor, second open / closed state monitoring sensor, and third open / closed state monitoring sensor, and display them on the main control screen 11.

[0041] In some embodiments, the manhole cover 5 is retrofitted to be configured with temperature and pressure sensors to determine whether the tank has abnormal overpressure or pressure loss by monitoring the temperature and pressure in the tank in real time. Figure 4a , 4b As shown in the drawings, preferably, the temperature and pressure sensors are installed at the reserved hole of the manhole cover.

[0042] In some embodiments, the main function of the vent valve 2 in the oil vapor recovery system is to exhaust the residual gas in the gas phase pipeline after loading and unloading is completed. The vent valve is closed during the loading and unloading process to ensure the airtightness of the system. During normal transportation, the vent valve 2 is opened to prevent the accumulation of oil vapor in the gas phase pipeline. In this embodiment, the vent valve 2 is configured with a first opening and closing state monitoring sensor and a VOCs concentration real-time monitoring sensor, so that it has the ability to monitor the opening and closing state and the VOCs concentration in real time. The existence of abnormal leakage in the oil vapor recovery system can be determined by monitoring the concentration of the vent valve 2. As shown in the drawings, Figure 5a , 5b The first opening and closing state monitoring sensor is composed of small line board component probes, and the VOCs concentration real-time monitoring sensor is composed of line board component probes. Both are installed above and on the side of the fixed seat, and the fixed seat is integrally installed on the valve body shell. The signal feedback source magnet matched with the sensor is installed on the movable valve stem, the inductive magnet is installed in the magnet fixed seat, the magnet fixed seat is installed on the movable valve stem, and the movable valve stem is moved back and forth. The distance between the two is used to achieve the inductive effect, and the collected data is transmitted to the main control.

[0043] In some embodiments, the oil vapor recovery valve 3 is the valve connecting the tank and the gas phase pipeline of the oil vapor recovery system. In this embodiment, the oil vapor recovery valve 3 is configured with a second opening and closing state monitoring sensor, so that it has the function of monitoring the opening and closing state. If the oil vapor recovery valve 3 is closed and the VOCs value of the vent valve is abnormal, it can be determined that the sealing performance of the oil vapor recovery valve 3 has been lost. As shown in the drawings, Figure 6a , 6b The second opening and closing state monitoring sensor is composed of small line board component probes and is fixedly installed in the small valve cover on the top of the valve body. The signal feedback source magnet matched with the sensor is installed on the movable valve stem, the inductive magnet is installed in the magnet fixed seat, the magnet fixed seat is installed on the movable valve stem, and the movable valve stem is moved back and forth. The distance between the two is used to achieve the inductive effect, and the collected data is transmitted to the main control.

[0044] In some embodiments, the emergency shut-off valve 7 belongs to the bottom loading system component of the oil vapor recovery system and is the valve connecting the tank and the liquid phase loading and unloading pipeline. In this embodiment, the emergency shut-off valve 7 is configured with a third opening and closing state monitoring sensor, so that it has the function of monitoring the opening and closing state to monitor whether the tank truck is in the loading / unloading state. As shown in the drawings, Figure 7a , 7bAs shown, the third opening and closing state monitoring sensor is a small circuit board component probe and the like, fixedly installed in the inner cover, and the circuit board fixing support is made of 304 stainless steel sheet metal part. The signal feedback source magnet matched with the sensor is installed on the movable valve rod, and the movable valve rod is moved back and forth to realize the inductive effect according to the distance between the two, and the collected data is transmitted to the main control.

[0045] In some embodiments, the main control screen 11 is a human-computer interaction terminal, which integrates a terminal controller to collect signals transmitted by various valve sensors, analyzes the signals, and displays the signals on the main control screen 11. The main control screen 11 reserves an Internet of Things interface and a maintenance interface, and can be connected to various environmental protection platforms in the future.

[0046] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0047] The online monitoring system in the embodiments of the present application can effectively monitor the oil tank after the oil tank truck oil gas recovery system is detected, so as to prevent oil gas from escaping. The Internet of Things interface reserved by the main control screen can realize platformized real-time monitoring and provide effective technical support for the ecological environment department.

[0048] The running alarm logic of the main control screen and the main controller is described according to the oil tank truck loading / unloading operation state and the normal transportation operation state to elaborate the action process of the application scheme:

[0049] (1) Oil tank truck loading / unloading operation state

[0050] In the loading / unloading state, the oil gas recovery valve 3 is in an open state, connecting the gas phase space of the oil tank and the oil tank truck; the emergency shut-off valve 7 is in an open state, connecting the liquid phase space of the oil tank and the oil tank truck; and the breather valve 2 is in a closed state, cutting off the connection between the gas phase pipeline and the atmosphere. The VOCs sensor of the breather valve 2 should collect a value not greater than 500 μmol / mol at all times in the loading / unloading state.

[0051] At this time, if the oil tank truck is loading oil in the oil storage depot, when the pressure of the manhole cover 5 pressure sensor exceeds 6 kPa, the main control screen issues a warning: the oil loading rate is too fast, and the pressure in the tank will exceed the opening pressure of the breather valve, please reduce the oil loading rate or increase the recovery rate; if the oil tank truck is unloading oil at the gas station, when the pressure of the manhole cover 5 pressure sensor exceeds -2 kPa, the main control screen issues a warning: the oil unloading rate is too fast, and the pressure in the tank will exceed the opening pressure of the breather valve, please reduce the oil unloading rate or increase the pressure of the inert gas supplement (if the breather valve is continuously opened under negative pressure, a high-concentration mixture of air and oil gas will be formed in the tank, which will cause serious safety hazards).

[0052] When the loading / unloading state ends, the oil vapor recovery valve 3 is in the closed state, cutting off the gas phase space of the oil tank and the tank truck; the emergency cut-off valve 7 is in the closed state, cutting off the liquid phase space of the oil tank and the tank truck; and the breather valve 2 is in the open state, connecting the gas phase pipeline with the atmosphere. When the loading / unloading state ends, the VOCs sensor of the breather valve 2 should have a short-term high concentration, and at this time, no alarm is needed, and the value should not be greater than 500 μmol / mol after 5 minutes.

[0053] (2) Normal transportation operation state

[0054] The normal transportation operation state is the state after the loading / unloading ends, and each valve should keep the state at the end of loading / unloading until the next oil loading / unloading. When the normal transportation operation state is in the normal transportation operation state, the temperature and pressure sensors of the manhole cover 5 collect the temperature and pressure in the tank in real time. When the temperature and pressure curves are highly positively correlated, it is assumed that the pressure abnormality of the tank is caused by the change of the ambient temperature, and no alarm is needed. When the temperature is basically unchanged and the pressure is abnormal (the pressure is reduced due to the tank leakage), if the VOCs sensor of the breather valve 2 collects a value not greater than 500 μmol / mol, the main control screen issues a warning: the sealing performance of the tank is invalid, please stop transportation immediately, and after the tank is safely emptied, the airtightness detection of the oil vapor recovery system is performed; if the VOCs sensor of the breather valve 2 collects a value greater than 500 μmol / mol, the main control screen issues a warning: the sealing performance of the oil vapor recovery valve 3 is invalid, please stop transportation immediately, and after the tank is safely emptied, the airtightness detection of the oil vapor recovery system is performed.

[0055] Although the preferred embodiments of the present disclosure have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present disclosure.

[0056] Obviously, those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these modifications and variations.

Claims

1. An online monitoring system for oil tank truck vapor recovery, characterized in that, It comprises: a manhole cover provided on the tank body, on which a temperature sensor and a pressure sensor are arranged; a breather valve connected with the gas phase pipeline of the tank body, on which a first opening and closing state monitoring sensor and a VOCs concentration real-time monitoring sensor are arranged; an oil gas recovery valve provided on the manhole cover, on which a second opening and closing state monitoring sensor is arranged; an emergency shut-off valve provided on the tank body, on which a third opening and closing state monitoring sensor is arranged; a main control screen and a main controller, which is used to integrate the terminal controller to collect the signals transmitted by the temperature sensor, the pressure sensor, the first opening and closing state monitoring sensor, the VOCs concentration real-time monitoring sensor, the second opening and closing state monitoring sensor and the third opening and closing state monitoring sensor, and display on the main control screen.

2. The tank truck vapor recovery online monitoring system of claim 1, wherein, The temperature sensor and the pressure sensor on the manhole cover are installed through the reserved holes.

3. The tank truck vapor recovery online monitoring system of claim 1, wherein, The first opening and closing state monitoring sensor and the VOCs concentration real-time monitoring sensor of the breather valve are respectively installed above and on the side of the fixed seat installed on the valve body shell of the breather valve, the signal feedback source first magnet matched with the first opening and closing state monitoring sensor and the VOCs concentration real-time monitoring sensor is installed on the movable valve rod of the breather valve, and the inductive effect is realized by the back and forth movement of the movable valve rod and the distance of the first magnet movement.

4. The tank truck vapor recovery online monitoring system of claim 1, wherein, The second opening and closing state monitoring sensor is fixedly installed inside the small valve cover on the top of the valve body of the oil gas recovery valve, and the signal feedback source second magnet matched with the second opening and closing state monitoring sensor is installed on the movable valve rod of the oil gas recovery valve, which moves back and forth, and the inductive effect is realized by the distance of the second magnet movement.

5. The tank truck vapor recovery online monitoring system of claim 1, wherein, The third opening and closing state monitoring sensor is fixedly installed inside the middle cover of the emergency shut-off valve, and the signal feedback source third magnet matched with the third opening and closing state monitoring sensor is installed on the movable valve rod of the emergency shut-off valve, which moves back and forth, and the inductive effect is realized by the distance of the third magnet movement.

6. The tank truck vapor recovery online monitoring system of claim 1, wherein, The main control screen is provided with an Internet of Things interface and a maintenance interface.

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