Carbon dioxide storage tank box with system monitoring function

Abstract

The invention relates to a carbon dioxide storage tank and provides a carbon dioxide storage tank with a system monitoring function in order to solve the technical problems that media cannot be loaded and unloaded at the two ends of an existing tank at the same time, and state information of the media in the tank cannot be obtained in real time. Comprising a tank container frame, a tank container body, an auxiliary adding and discharging pipeline, a main adding and discharging pipeline and a data monitoring system. The auxiliary adding and discharging pipeline comprises an auxiliary liquid inlet pipeline and an auxiliary gas-phase pipeline, and the auxiliary gas-phase pipeline is used for balancing gas-phase pressure between the tank box and an external facility; the main adding and discharging pipeline comprises an emptying pipeline, a liquid outlet pipeline, a main gas phase pipeline, a main liquid inlet pipeline, a pressure relief pipeline and a liquid level monitoring pipeline which are arranged on the outer side wall of the rear end of the tank body from bottom to top; the main gas-phase pipeline is used for balancing gas-phase pressure between the tank and an external facility; the liquid level monitoring pipeline is used for measuring pressure and liquid level information of a medium in the tank body; the data monitoring system is used for remotely controlling opening and closing of all the valve assemblies and collecting pressure and liquid level information of all the pipelines.

Description

Technical Field

[0001] The invention relates to a carbon dioxide storage tank box, in particular to a carbon dioxide storage tank box with a system monitoring function. Background Art

[0002] In recent years, with the development of multimodal transport equipment and the rise of green and low-carbon industries, the demand for transportation and storage equipment in the field of CCUS petrochemical industry has become increasingly apparent. CCUS technology refers to carbon capture, utilization and storage technology. For carbon dioxide produced in the industrial field, this technology is considered to be the most economical and feasible way to reduce carbon emissions and slow global warming on a large scale in the future.

[0003] Liquid carbon dioxide fixed storage tanks and mobile pressure tankers have a certain application market, and the use density of mobile carbon dioxide tank containers in the oil and gas well development process is increasing year by year. Compared with fixed storage tanks, mobile carbon dioxide tank containers are more widely used because they are easy to transport and store.

[0004] The existing carbon dioxide tank containers have their tank filling and discharge pipelines or loading and unloading liquid pipes set at one end of the container, and the other end of the container does not have the conditions for loading and unloading the medium. However, due to the high density of equipment in the fracturing construction area, it is often necessary to have the functions of filling and unloading the medium at both ends of the tank to meet the normal operation of the overall pipeline system during the oil fracturing process. In addition, the existing carbon dioxide tank containers do not have the functions of storing liquid carbon dioxide and matching with fracturing equipment, and cannot meet the container pressure bearing capacity during the CCUS fracturing process, and cannot guarantee the safe production of users; and the tanks cannot be used in conjunction with each other, cannot be regulated at the same time, and cannot obtain the medium status information in the tank in real time, making it difficult to conduct safety supervision of the tank status. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that the existing carbon dioxide tank container cannot realize the loading and unloading of the medium at both ends of the tank container at the same time, cannot store liquid carbon dioxide, cannot meet the pressure bearing capacity of the container during CCUS fracturing, and cannot obtain the medium status information in the tank container in real time, and proposes a carbon dioxide storage tank container with a system monitoring function.

[0006] In order to achieve the above purpose, the technical solution proposed by the present invention is:

[0007] A carbon dioxide storage tank with a system monitoring function, comprising a tank frame and a tank body installed in the tank frame, and having the special features of: further comprising auxiliary supply and discharge pipelines and main supply and discharge pipelines respectively arranged on the outer side walls at the front and rear ends of the tank body, and a data monitoring system;

[0008] The tank body is provided with a secondary liquid inlet and a secondary gas phase inlet at the top of the front side wall; the tank body is provided with a main liquid inlet, a main gas phase inlet and an upper liquid level inlet at the top of the rear side wall; and the tank body is provided with a liquid discharge inlet and a sewage discharge inlet at the bottom of the rear side wall.

[0009] The auxiliary addition and discharge pipeline includes an auxiliary liquid inlet pipeline and an auxiliary gas phase pipeline, one end of the auxiliary liquid inlet pipeline is connected to the auxiliary liquid inlet pipe port; one end of the auxiliary gas phase pipeline is connected to the auxiliary gas phase pipe port, which is used to balance the gas phase pressure between the tank container and the external facilities, and to increase the internal pressure of the tank container;

[0010] The main charging and discharging pipeline includes a venting pipeline arranged on the outer side wall of the rear end of the tank body, a liquid outlet pipeline, a main gas phase pipeline, a main liquid inlet pipeline, a pressure relief pipeline and a liquid level monitoring pipeline which are arranged on the outer side wall of the rear end of the tank body from bottom to top and are respectively connected to the venting pipeline; the venting pipeline is used to release the pressure in each pipeline; one end of the liquid outlet pipeline is connected to the liquid unloading pipe port; one end of the main liquid inlet pipeline is connected to the main liquid inlet pipe port; one end of the main gas phase pipeline is connected to the main gas phase pipe port to balance the gas phase pressure between the tank box and the external facilities; one end of the pressure relief pipeline is connected to the main gas phase pipe port; one end of the liquid level monitoring pipeline is connected to the upper liquid level pipe port, and the other end is connected to the sewage pipe port to measure the pressure and liquid level information of the medium in the tank body;

[0011] Valve assemblies are provided between each interconnected pipe opening and pipeline, and between pipelines;

[0012] The data monitoring system is used to remotely control the opening and closing of each valve assembly and to collect pressure and liquid level information of the liquid level monitoring pipeline in real time.

[0013] Furthermore, a pressure regulating pipeline is provided between the main gas phase pipeline and the liquid outlet pipeline, and a pressure regulating valve is provided on the pressure regulating pipeline for supplementing the pressure of the liquid outlet pipeline through the main gas phase pipeline.

[0014] Furthermore, the valve components between the interconnected pipe ports and pipelines include electric-controlled valves and manual-controlled valves, and the electric-controlled valves are electrically connected to a data monitoring system, and the data monitoring system is used to remotely control the opening or closing of each electric-controlled valve;

[0015] A safety valve is arranged between the electric control valve and the manual control valve to prevent the medium on the pipeline between the two sets of valves from damaging the valves and ensure the safety of the tank.

[0016] Furthermore, the data monitoring system includes an acquisition control system and a remote control system;

[0017] The acquisition control system is arranged on the outer side of the rear end of the tank container, and is used to collect the liquid level pressure information and liquid level change information on the liquid level monitoring pipeline, and convert the collected electrical signals into digital signals and transmit them to the remote control system;

[0018] The remote control system is used to control the valve opening of each electronically controlled valve and to monitor the liquid level and pressure status of the tank in real time.

[0019] Further, the liquid level monitoring pipeline includes a liquid level gauge and a differential pressure liquid level gauge;

[0020] The upper pipeline and the lower pipeline of the liquid level meter are respectively connected to the upper liquid level pipe port and the sewage discharge pipe port, and are used to measure the liquid level inside the tank body;

[0021] The upper differential pressure pipeline of the differential pressure level gauge is connected to the upper pipeline of the level gauge, and the lower differential pressure pipeline is connected to the lower pipeline of the level gauge, which is used to measure the liquid level pressure inside the tank body;

[0022] The liquid level meter is provided with a liquid level transmitter for transmitting the liquid level information inside the tank to the data monitoring system;

[0023] The differential pressure level gauge is provided with a pressure transmitter for transmitting the pressure information inside the tank to the data monitoring system.

[0024] Further, the tank container frame is a hollow rectangular parallelepiped frame, including a front frame, a rear frame, two top transverse connecting frames and two bottom transverse connecting frames for connecting the top and bottom of the front frame and the rear frame;

[0025] The four connecting corners of the front frame and the rear frame are provided with reinforcing diagonal bars, and the two vertical connecting rods on the front frame and the rear frame are connected to the bottom transverse connecting frame through reinforcing diagonal bars to ensure the stability of the tank container frame;

[0026] The two ends of the tank body are fixedly connected to the front frame and the rear frame through the secondary skirt and the main skirt respectively.

[0027] The inner sides of the two top transverse connecting frames are both provided with inwardly extending walkways for enabling operators to operate on the top of the tank frame.

[0028] Further, the rear end frame is provided with a rear end valve box, an operating platform and a ladder, the rear end valve box includes a left door panel, a right door panel and a door panel mounting frame, the height of the door panel mounting frame is lower than the height of the rear end frame, the door panel mounting frame is fixedly mounted on the rear end frame, and the left door panel and the right door panel are hinged on both sides of the door panel mounting frame;

[0029] The operating platform is installed on the rear end frame and is located above the rear end valve box. The lower end of the operating platform is hinged to the upper crossbeam of the door panel mounting frame, and the upper ends of both sides are connected to the upper crossbeam of the rear end frame through a lifting chain. When the lifting chain is stretched to a tensioned state, the operating platform is perpendicular to the rear end frame; when the lifting chain is retracted, the operating platform is parallel to the rear end frame.

[0030] A door lock assembly is also provided between the upper end of the operating platform and the upper crossbeam of the rear end frame, which is used to close or open the operating platform;

[0031] The ladder is fixed on one side of the rear end frame and is used for operators to climb from the bottom of the tank frame to the top to perform operations;

[0032] A safety rope is connected between the upper cross beams on the top of the front frame and the rear frame to ensure the life safety of the operator.

[0033] Furthermore, the outlet end of the venting pipeline is located at the top of the main charging and discharging pipeline, and an anti-blocking structure is provided on the outlet end to prevent ice blockage inside the main charging and discharging pipeline, which may lead to safety accidents caused by poor pressure release of the tank or pipeline;

[0034] The anti-clogging structure includes a transverse through pipe, a U-shaped through pipe and a vertical through pipe which are sequentially connected to the outlet end of the venting pipeline. The opening end of the U-shaped through pipe faces upward to prevent liquid or impurities from flowing back into the venting pipeline.

[0035] Furthermore, a heat preservation component is also provided on the outer surface of the tank body, for heat preservation and protection of the tank body;

[0036] The thermal insulation assembly comprises a foamed thermal insulation layer and a thermal insulation skin which are sequentially arranged on the outer surface of the tank body from the inside to the outside, and the thermal insulation skin is fixed to the tank body by a thermal insulation fixing belt;

[0037] The foam insulation layer is a polyurethane foam layer, and the insulation skin is an aluminum color plate insulation skin;

[0038] A manhole is provided at the front end cover of the tank container body for operators to inspect the inside of the tank body.

[0039] Further, a front-end valve box is provided on the front-end frame, and the front-end valve box includes a front-end valve frame and a front door plate fixed on the front-end frame, an upper crossbeam of the front-end valve frame is hinged to the upper end of the front door plate, and a door lock assembly is provided between the lower crossbeam of the front-end valve frame and the lower end of the front door plate;

[0040] A mirror observation plate is provided on the outer side wall at the front end of the tank body at the upper end of the auxiliary gas phase pipeline for observing the opening indication of the electric control valve on the auxiliary gas phase pipeline.

[0041] Beneficial effects of the present invention:

[0042] [1] The carbon dioxide storage tank with system monitoring function of the present invention can meet the various functional requirements of short-term storage of liquid carbon dioxide medium and CCUS fracturing process, realize the use requirements of user remote intelligent monitoring operation, further improve the safety and reliability of the storage tank, effectively reduce the intensity of on-site work and safety risks, ensure the life safety and property safety of operators, and reduce the labor intensity of operators through intelligent control, saving labor costs and improving work efficiency.

[0043] [2] The present invention provides reinforcing diagonal bars at four connecting corners of the front frame and the rear frame, which not only increases the overall rigidity and stability of the tank frame, but also facilitates welding the two ends of the tank body to the front frame and the rear frame through the secondary skirt and the main skirt, so that the tank and the tank frame are connected as one. At the same time, the gaps between the insulation layers can be shielded, making the tank body more beautiful as a whole.

[0044] [3] The present invention provides a safety rope on the top of the tank body as a safety protection device for operators working at heights, thereby ensuring the life safety of the operators and significantly improving the safety performance of the tank body structure.

[0045] [4] The present invention can effectively prevent liquid or impurities from flowing back into the blocked pipeline by arranging an anti-blocking structure at the outlet end of the venting pipeline, thereby ensuring the pressure relief performance of the venting pipeline and avoiding poor pressure release caused by blockage of the tank or loading and unloading pipeline, thereby greatly improving the safety and reliability of the loading and unloading pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of an embodiment of a carbon dioxide storage tank container with a system monitoring function of the present invention;

[0047] Figure 2 Schematic diagram of the installation position of the main addition and discharge pipeline in the embodiment of the present invention;

[0048] Figure 3 Schematic diagram of the installation position of the auxiliary addition and discharge pipeline in the embodiment of the present invention;

[0049] Figure 4 It is a structural schematic diagram of the main addition and discharge pipeline in an embodiment of the present invention;

[0050] Figure 5 is a schematic diagram of the structure of the auxiliary addition and discharge pipeline in an embodiment of the present invention;

[0051] Figure 6 Schematic diagram of the pipeline connection between the main adding and discharging pipeline, the auxiliary adding and discharging pipeline and the tank body in the embodiment of the present invention;

[0052] Figure 72 is a schematic structural diagram of a tank container body and a tank container frame according to an embodiment of the present invention;

[0053] Figure 8 This is a schematic diagram of the structure of the rear end valve box in an embodiment of the present invention;

[0054] Fig. 9 Schematic diagram of the external structure of the tank container body in an embodiment of the present invention;

[0055] Figure Number:

[0056] 1-tank frame, 2-tank body, 3-auxiliary charging and discharging pipeline, 4-main charging and discharging pipeline, 5-auxiliary liquid inlet pipe, 6-auxiliary gas phase pipe, 7-main liquid inlet pipe, 8-main gas phase pipe, 9-upper liquid level pipe, 10-liquid discharge pipe, 11-drain pipe, 12-auxiliary liquid inlet pipeline, 13-auxiliary gas phase pipeline, 14-venting pipeline, 15-liquid outlet pipeline, 16-main gas phase pipeline, 17-main liquid inlet pipeline, 18-pressure relief pipeline, 19- Pressure regulating pipeline, 20-level gauge, 21-differential pressure level gauge, 22-front end frame, 23-rear end frame, 24-top horizontal connecting frame, 25-bottom horizontal connecting frame, 26-reinforced diagonal rod, 27-walkway, 28-rear end valve box, 29-operating platform, 30-ladder, 31-safety rope, 32-anti-blocking structure, 33-front end valve box, 34-mirror observation panel, 35-insulation component, 36-collection control system. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The embodiment of the present invention provides a carbon dioxide storage tank box with a system monitoring function, such as Figure 1 As shown, it includes a tank frame 1 and a tank body 2 installed in the tank frame 1, and also includes an auxiliary supply and discharge pipeline 3 and a main supply and discharge pipeline 4 respectively arranged on the outer side walls of the front and rear ends of the tank body 2, and a data monitoring system;

[0059] like Figure 7 As shown, the tank container frame 1 is a hollow rectangular parallelepiped frame, including a front frame 22, a rear frame 23, two top transverse connecting frames 24 and two bottom transverse connecting frames 25 for connecting the top and bottom of the front frame 22 and the rear frame 23;

[0060] Reinforcing diagonal bars 26 are provided on the four connecting corners of the front end frame 22 and the rear end frame 23. The two vertical connecting rods on the front end frame 22 and the rear end frame 23 are connected to the bottom transverse connecting frame 25 through the reinforcing diagonal bars 26, which are used to ensure the stability of the tank frame 1, increase the overall rigidity and stability of the tank frame 1, and also facilitate the two ends of the tank body 2 to be welded together with the front end frame 22 and the rear end frame 23 through the secondary skirt and the main skirt, so that the tank and the tank frame 1 are connected as one, and at the same time, the gap between the insulation layers can be covered, making the tank body more beautiful as a whole; the inner sides of the two top transverse connecting frames 24 are provided with inwardly extending walkways 27, which are used for operators to be located on the top of the tank frame 1 for work.

[0061] like Figure 8 As shown, a rear end valve box 28, an operating platform 29 and a ladder 30 are provided on the rear end frame 23. The rear end valve box 28 includes a left door panel, a right door panel and a door panel mounting frame. The height of the door panel mounting frame is lower than the height of the rear end frame 23. The door panel mounting frame is fixedly mounted on the rear end frame 23. The left door panel and the right door panel are hinged on both sides of the door panel mounting frame. A door lock assembly is provided on the connecting end surfaces of the left door panel and the right door panel for opening and closing the rear end valve box 28. The rear end valve box 28 is used to protect the main charging and discharging pipeline 4 on the rear end outer wall of the tank container body 2.

[0062] The operating platform 29 is installed on the rear end frame 23 above the rear end valve box 28. The lower end of the operating platform 29 is hinged to the upper beam of the door panel mounting frame, and the upper ends of both sides are connected to the upper beam of the rear end frame 23 through lifting chains. When the lifting chain is stretched to a taut state, the operating platform 29 is perpendicular to the rear end frame 23; when the lifting chain is retracted, the operating platform 29 is parallel to the rear end frame 23; a door lock assembly is also provided between the upper end of the operating platform 29 and the upper beam of the rear end frame 23, which is used to close or open the operating platform 29; when the tank container is in the process of transporting and storing media, the operating table is in a vertically closed state; when the tank body is used in a stacked state at the fracturing site, the door lock assembly on the operating table is opened, and the operating table is rotated to be flat and the lifting chain is tightened, so that it can become a working platform for the operator to operate the upper equipment.

[0063] The ladder 30 is fixed to one side of the rear end frame 23, and is used for operators to climb from the bottom of the tank frame 1 to the top thereof to perform operations;

[0064] A safety rope 31 is connected between the upper crossbeams at the top of the front frame 22 and the rear frame 23 to ensure the life safety of the operator. The safety rope 31 includes a hanging ring, a heart ring, a steel wire rope and a steel wire rope clamp, and is a device for the operator to work safely on the top of the device;

[0065] A front valve box 33 is provided on the front frame 22. The front valve box 33 includes a front valve frame and a front door plate fixed on the front frame 22. The upper crossbeam of the front valve frame is hinged to the upper end of the front door plate. A door lock assembly is provided between the lower crossbeam of the front valve frame and the lower end of the front door plate.

[0066] A mirror observation plate 34 is provided on the outer side wall at the front end of the tank body 2 at the upper end of the auxiliary gas phase pipeline 13 for observing the opening indication of the electric control valve on the auxiliary gas phase pipeline 13 .

[0067] The tank body 2 includes a tank body and a tank head welded to the front and rear sides of the tank body. The tank body 2 is welded to the front frame 22 and the rear frame 23 through a secondary skirt and a main skirt. A manhole is provided at the front end head of the tank body 2 for operators to inspect the inside of the tank body.

[0068] like Figure 7 As shown, a thermal insulation component 35 is also provided on the outer surface of the tank body 2 for thermal insulation protection of the tank body 2; the thermal insulation component 35 includes a foamed thermal insulation layer and a thermal insulation skin which are arranged on the outer surface of the tank body 2 from the inside to the outside, and the thermal insulation skin is fixed on the outer surface of the tank body 2 by a thermal insulation fixing belt; the foamed thermal insulation layer is a polyurethane foam layer, and the thermal insulation skin is an aluminum color plate thermal insulation skin.

[0069] like Figure 6 , Fig. 9 As shown, the tank body 2 is provided with a secondary liquid inlet pipe port 5 and a secondary gas phase pipe port 6 at the top of the front side wall; the tank body 2 is provided with a main liquid inlet pipe port 7, a main gas phase pipe port 8 and an upper liquid level pipe port 9 at the top of the rear side wall; the tank body 2 is provided with a liquid discharge pipe port 10 and a sewage discharge pipe port 11 at the bottom of the rear side wall;

[0070] like Figure 3 and Figure 5 , Figure 6 As shown, the auxiliary addition and discharge pipeline 3 includes an auxiliary liquid inlet pipeline 12 and an auxiliary gas phase pipeline 13. When the medium discharge amount of the liquid outlet pipeline 15 in the main addition and discharge pipeline 4 is insufficient or the speed is slow, the tank body can be pressurized through the auxiliary addition and discharge pipeline 3 to increase the unloading rate of the liquid medium; one end of the auxiliary liquid inlet pipeline 12 is connected to the auxiliary liquid inlet pipe port 5, and the other end of the auxiliary liquid inlet pipeline 12 is provided with an auxiliary liquid infusion port for auxiliary filling of the medium into the tank body; one end of the auxiliary gas phase pipeline 13 is connected to the auxiliary gas phase pipe port 6, and the other end is provided with a pressure discharge port for balancing the gas phase pressure between the tank box and the external facilities and for internal pressurization of the tank box; in order to ensure the consistency and adaptability of the size of the auxiliary addition and discharge pipeline 3, the nominal sizes of the auxiliary liquid inlet pipeline 12 and the auxiliary gas phase pipeline 13 are DN50 and DN40 respectively, which can be adapted and connected with the external storage tank.

[0071] In order to protect the safe operation between the auxiliary supply and discharge pipeline 3 and the valve assembly, a front end valve box 33 is arranged outside the auxiliary supply and discharge pipeline 3.

[0072] A front-end valve box 33 is arranged on the front-end frame 22, and the front-end valve box 33 comprises a front-end valve frame and a front door panel fixed on the front-end frame 22, an upper crossbeam of the front-end valve frame is hinged to the upper end of the front door panel, and a door lock assembly is arranged between the lower crossbeam of the front-end valve frame and the lower end of the front door panel; the opening and closing angle of the front-end valve box 33 is not less than 180°, which can effectively ensure the convenience of operation of the auxiliary exhaust pipeline 3.

[0073] A mirror observation plate 34 is provided on the outer side wall at the front end of the tank body 2 at the upper end of the auxiliary gas phase pipeline 13 for observing the opening indication of the electric control valve on the auxiliary gas phase pipeline 13 .

[0074] like Figure 2 and Figure 4 , Figure 6 As shown, the main charging and discharging pipeline 4 includes a venting pipeline 14, a liquid outlet pipeline 15, a main gas phase pipeline 16, a main liquid inlet pipeline 17, a pressure relief pipeline 18 and a liquid level monitoring pipeline arranged on the outer side wall of the rear end of the tank from bottom to top;

[0075] The venting pipeline 14 is connected to the liquid outlet pipeline 15, the main gas phase pipeline 16, the main liquid inlet pipeline 17 and the sewage outlet 11 through multiple connecting pipelines, and is used to release the pressure in each pipeline. The multiple connecting pipelines are connected separately to facilitate the construction personnel to disassemble each pipeline, ensure the safety of operation, and can also be used for discharging residual liquid after the medium in the pipe is unloaded; the outlet end of the venting pipeline 14 is located at the top of the main charging and discharging pipeline 4, and an anti-blocking structure 32 is provided at the outlet for automatic discharge when rain, snow or impurities accumulate in the pipeline; the main gas phase pipeline 16 is used to balance the gas phase pressure between the tank container and external facilities.

[0076] The anti-clogging structure 32 includes a horizontal through pipe, a U-shaped through pipe and a vertical through pipe which are connected in sequence to the outlet end of the venting pipeline 14. The opening end of the U-shaped through pipe faces upward, which is used to prevent liquid or impurities from flowing back into the venting pipeline 14, and to prevent ice blockage inside the main filling and discharge pipeline 4, resulting in safety accidents caused by poor pressure release of the tank or pipeline.

[0077] One end of the liquid outlet pipeline 15 is connected to the liquid unloading pipe port 10, and the other end is provided with a liquid outlet. Two valve assemblies are connected in series on the liquid outlet pipeline 15, of which the end is a set of electric control valves for the convenience of remote control by the operator, and the root is a set of manual control valves. In order to increase the liquid unloading speed, the size of the liquid outlet pipeline 15 is generally DN100. Since the nominal size of the liquid outlet pipeline 15 is relatively large, when the tank container is placed on the ground, in order to facilitate connection with the ground loading and unloading pipeline, the height position of the liquid outlet pipeline 15 should be relatively low to ensure that the bending deformation of the loading and unloading pipeline is within a reasonable range after connection, and to prevent leakage from the connection surface during the liquid unloading process;

[0078] One end of the main liquid inlet pipeline 17 is connected to the main liquid inlet pipe port 7, and the other end is provided with a main liquid inlet;

[0079] One end of the main gas phase pipeline 16 is connected to the main gas phase pipe port 8, and the other end is connected to a pressure relief valve for balancing the pressure between the tank body and the main charging and discharging pipeline 4; a pressure regulating pipeline 19 is also provided between the main gas phase pipeline 16 and the liquid outlet pipeline 15, and a pressure regulating valve is provided on the pressure regulating pipeline 19 for supplementing the pressure of the liquid outlet pipeline 15 through the main gas phase pipeline 16 before unloading the liquid, so as to prevent the pressure gradient of the liquid carbon dioxide medium from being reduced too much when it is unloaded from the end of the pipeline in the early stage of unloading, and then sublimating into dry ice, resulting in pipeline blockage; the main liquid inlet pipeline 17 and the main gas phase pipeline 16 are conveniently connected to most of the liquid carbon dioxide tank trucks or fixed storage tanks in China, and the pipeline diameters are set to DN50 and DN40 respectively.

[0080] One end of the pressure relief pipeline 18 is connected to the main gas phase pipe port 8, and the other end is connected to the outlet end of the vent pipeline 14 through a pressure relief valve. The pressure relief pipeline 18 connects the gas phase space inside the tank container with the external atmosphere, and is used to actively release the pressure inside the tank. When the tank container is stored for too long, the liquid carbon dioxide medium vaporizes due to the increase in temperature, causing the internal pressure of the tank to increase to exceed the designed allowable pressure. The relevant valves of the pressure relief pipeline 18 are actively controlled to perform pressure relief operations to ensure the safe use of the tank.

[0081] The liquid level monitoring pipeline includes a liquid level gauge 20 and a differential pressure liquid level gauge 21. The upper pipeline and the lower pipeline of the liquid level gauge 20 are respectively connected to the upper liquid level pipe port 9 and the sewage pipe port 11, and are used to observe the liquid level inside the tank body; the upper differential pressure pipeline of the differential pressure liquid level gauge 21 is connected to the upper pipeline of the liquid level gauge 20, and the lower differential pressure pipeline is connected to the lower pipeline of the liquid level gauge 20, and is used to measure the liquid level pressure inside the tank body; the liquid level gauge 20 is a magnetic flap type liquid level gauge 20, which is arranged in the middle of the main filling and discharging pipeline 4, and the measuring range covers the maximum filling volume of the tank container, and It is also convenient to visually observe the changes of the medium in the tank during loading and unloading. A liquid level transmitter is provided on it to transmit the liquid level information inside the tank to the data monitoring system; a pressure transmitter is provided on the differential pressure level gauge 21 to transmit the pressure information inside the tank to the data monitoring system. A stop valve is provided at the root of the pipeline of the liquid level gauge 20 and the differential pressure level gauge 21. When the differential pressure level gauge 20 or the liquid level gauge 20 needs to be repaired, the stop valve can be actively closed to cut off the connection with the inside of the tank to ensure the safety of disassembly and assembly of related instruments.

[0082] The valve components between each interconnected pipe mouth and pipeline include an electric control valve and a manual control valve, which can prevent one valve from being abnormal while the other valve can ensure the normal use of the working performance of the entire pipeline; one electric control valve can be configured on the liquid outlet pipeline 15, the main gas phase pipeline 16, the main liquid inlet pipeline 17, the auxiliary liquid inlet pipeline 12 and the auxiliary gas phase pipeline 13 according to actual use requirements, and one or two manual control valves can be set on other pipelines, or one electric valve and one manual control valve can be set; the electric control valve is electrically connected to the data monitoring system, and the data monitoring system is used to remotely control the opening or closing of each electric control valve; a safety valve for pressure relief when the pipeline is abnormally over-pressured is also provided between each group of electric control valves and the manual control valve or between the manual control valve and the manual control valve, so as to prevent the medium on the pipeline between the two groups of valves from damaging the valve and ensure the safety of the tank;

[0083] The data monitoring system is used to remotely control the opening and closing of each electronically controlled valve, and to collect and monitor the pressure and liquid level information of the liquid level monitoring pipeline in real time. Each group of electronically controlled valves is used in conjunction with the data monitoring system to realize the linkage control of the auxiliary charging and discharging pipelines 3 and the main charging and discharging pipelines 4 on several interconnected tank containers, greatly improving the tank container operation efficiency. Each group of electronically controlled valves is a proportional control valve.

[0084] The data monitoring system includes an acquisition control system 36 and a remote control system. The remote control system is a PC terminal, which can be a desktop computer, a laptop computer, a tablet computer, etc. The PC terminal is installed with control software, and the control system realizes remote intelligent control and monitoring of multiple tank containers. The software backs up the terminal control instructions and valve component status, stores them in a database, and can be queried through the software. The software communicates with each tank container based on the TCP / IP protocol. The system has the functions of adding, editing, deleting, and viewing tank containers.

[0085] The acquisition control system 36 is arranged on the outer side of the rear end of the tank box, and is used to control the valve opening of each electronically controlled valve, as well as to collect the liquid level pressure information and liquid level change information on the liquid level monitoring pipeline, and convert the collected electrical signals into digital signals and transmit them to the remote control system, so as to monitor the liquid level status and pressure status of the tank body in real time. The acquisition control system 36 is composed of electrical components such as PLC, PLC analog expansion module, signal isolation fence, Ethernet switch, DC power supply, air switch, power indicator light, etc., which are installed in the electrical cabinet of the rear end valve box of the equipment. During operation, the external power supply outputs 24V DC power through the built-in DC power supply to supply power to various electrical components. The signal isolation fence isolates and processes the electrical signals output by various sensors at the operating layer, converts the electrical signals into digital signals through the PLC and PLC analog expansion modules, and transmits them to the remote control system. The remote control system outputs valve control signals, which are converted into digital signals through the isolation fence, PLC and PLC analog expansion modules, and then output to the proportional control electric valve. The proportional control valve can control the valve opening by different electrical signals. When the liquid level in the tank container reaches the set value, an audio and visual warning is given through the relay circuit. The pressure transmitter and liquid level transmitter can monitor the equipment status.

[0086] All the above-mentioned pipelines are connected with each other using seamless stainless steel pipes, which can be bent as a whole pipe or welded in combination with pipe fittings according to process conditions; all pipeline ends are equipped with joints connected to the loading and unloading system, and the interface form is not limited and can be set according to specific usage requirements.

[0087] When the carbon dioxide storage tank box in this embodiment is connected and filled with multiple tanks, it can be connected with the main liquid inlet pipeline 17 of the main filling and discharging pipeline 4 through the liquid phase loading and unloading hose, and the liquid can be slowly filled into the tank. Then the pressure relief pipeline 18 can be opened. During continuous filling, the medium in the box can also be exhausted to the outside. When it is confirmed that the purity of the discharged gas meets the requirements, the valve assembly on the pressure relief pipeline 18 is closed, and the gas phase loading and unloading pipeline is connected with the main gas phase pipeline 16 and the valve assembly on the main gas phase pipeline 16 is opened. At this time, the medium can be normally filled into the tank box until the end; the filling amount of the medium shall not exceed the maximum filling amount specified by the tank box design. The tank box liquid level and pressure indication should be continuously observed during the filling process to ensure the safety and stability of the filling process.

[0088] When the amount of liquid carbon dioxide in the tank is insufficient during use, the tank can be filled with emergency liquid through the auxiliary liquid inlet pipeline 12 and the auxiliary gas phase pipeline 13 in the auxiliary filling and discharging pipeline 3, and the filling method is the same as the above process.

[0089] When unloading liquid, the valve assembly on the pressure regulating pipeline 19 between the liquid outlet pipeline 15 and the main gas phase pipeline 16 on the main charging and discharging pipeline 4 should be opened first, and the liquid loading and unloading hose should be slowly inflated. When the internal pressure of the loading and unloading pipeline reaches the requirement, the valve assembly on the liquid outlet pipeline 15 can be opened to unload liquid. When the unloading rate is insufficient, the tank body can be pressurized through the auxiliary gas phase pipeline 13 to force the unloading rate to increase, but the pressure in the tank should be ensured not to exceed the maximum allowable working pressure.

[0090] During loading and unloading of liquid, the opening and closing of the electronically controlled valves on the relevant pipelines can be controlled by the data monitoring system. When the valve assembly is configured as a manual valve, the pipeline flow can also be flexibly controlled by controlling the opening of the manual valve.

Claims

1. A carbon dioxide storage tank container with a system monitoring function, comprising a tank container frame (1) and a tank container body (2) installed in the tank container frame (1), characterized in that: It also includes a secondary supply and discharge pipeline (3) and a main supply and discharge pipeline (4) respectively arranged on the outer side walls at the front and rear ends of the tank body (2), and a data monitoring system; The tank body (2) is provided with a secondary liquid inlet pipe opening (5) and a secondary gas phase pipe opening (6) at the top of the front end side wall; the tank body (2) is provided with a main liquid inlet pipe opening (7), a main gas phase pipe opening (8) and an upper liquid level pipe opening (9) at the top of the rear end side wall; and the tank body (2) is provided with a liquid discharge pipe opening (10) and a sewage discharge pipe opening (11) at the bottom of the rear end side wall. The auxiliary addition and discharge pipeline (3) comprises an auxiliary liquid inlet pipeline (12) and an auxiliary gas phase pipeline (13), one end of the auxiliary liquid inlet pipeline (12) is connected to the auxiliary liquid inlet pipe port (5); one end of the auxiliary gas phase pipeline (13) is connected to the auxiliary gas phase pipe port (6), and is used to balance the gas phase pressure between the tank container and the external facilities, and to increase the internal pressure of the tank container; The main adding and discharging pipeline (4) comprises a venting pipeline (14) arranged on the outer wall of the rear end of the tank body, a liquid outlet pipeline (15), a main gas phase pipeline (16), a main liquid inlet pipeline (17), a pressure relief pipeline (18) and a liquid level monitoring pipeline which are arranged on the outer wall of the rear end of the tank body from bottom to top; the venting pipeline (14) is used to release the pressure in each pipeline; one end of the liquid outlet pipeline (15) is connected to the liquid unloading pipe port (10); one end of the main liquid inlet pipeline (17) is connected to the main liquid inlet pipe port (7); one end of the main gas phase pipeline (16) is connected to the main gas phase pipe port (8); one end of the pressure relief pipeline (18) is connected to the main gas phase pipe port (8); one end of the liquid level monitoring pipeline is connected to the upper liquid level pipe port (9), and the other end is connected to the sewage outlet (11), and is used to measure the pressure and liquid level information of the medium in the tank body; Valve assemblies are provided between each interconnected pipe opening and pipeline, and between pipelines; The data monitoring system is used to remotely control the opening and closing of each valve component and to collect pressure and liquid level information of the liquid level monitoring pipeline in real time.

2. The carbon dioxide storage tank container with system monitoring function according to claim 1, characterized in that: A pressure regulating pipeline (19) is also provided between the main gas phase pipeline (16) and the liquid outlet pipeline (15), and a pressure regulating valve is provided on the pressure regulating pipeline (19) for increasing the pressure of the liquid outlet pipeline (15) through the main gas phase pipeline (16).

3. The carbon dioxide storage tank container with system monitoring function according to claim 2, characterized in that: The valve components between the interconnected pipe ports and pipelines include electric control valves and manual control valves, the electric control valves are electrically connected to a data monitoring system, and the data monitoring system is used to remotely control the opening or closing of each electric control valve; A safety valve is provided between the electric control valve and the manual control valve to prevent the medium in the pipeline between the two valve groups from being damaged by abnormal pressure increase caused by gasification due to temperature increase, thereby ensuring the safety of the tank.

4. The carbon dioxide storage tank container with system monitoring function according to claim 3, characterized in that: The data monitoring system includes a collection control system (36) and a remote control system; The collection control system (36) is arranged on the outer side of the rear end of the tank container, and is used to collect liquid level pressure information and liquid level change information on the liquid level monitoring pipeline, and convert the collected electrical signals into digital signals and transmit them to the remote control system; The remote control system is used to control the valve opening of each electronically controlled valve and to monitor the liquid level and pressure status of the tank in real time.

5. The carbon dioxide storage tank container with system monitoring function according to claim 4, characterized in that: The liquid level monitoring pipeline comprises a liquid level meter (20) and a differential pressure liquid level meter (21); The upper pipeline and the lower pipeline of the liquid level meter (20) are respectively connected to the upper liquid level pipe opening (9) and the sewage discharge pipe opening (11), and are used to measure the liquid level inside the tank body; The upper differential pressure pipeline of the differential pressure level gauge (21) is connected to the upper pipeline of the level gauge (20), and the lower differential pressure pipeline is connected to the lower pipeline of the level gauge (20), and is used to measure the liquid level pressure inside the tank body; The liquid level meter (20) is provided with a liquid level transmitter for transmitting the liquid level information inside the tank to the data monitoring system; The differential pressure level gauge (21) is provided with a pressure transmitter for transmitting the pressure information inside the tank to the data monitoring system.

6. The carbon dioxide storage tank container with system monitoring function according to claim 5, characterized in that: The tank container frame (1) is a hollow rectangular parallelepiped frame, comprising a front frame (22), a rear frame (23), two top transverse connecting frames (24) and two bottom transverse connecting frames (25) for connecting the top and bottom of the front frame (22) and the rear frame (23); The four connecting corners of the front frame (22) and the rear frame (23) are all provided with reinforcing diagonal bars (26), and the two vertical connecting bars on the front frame (22) and the rear frame (23) are connected to the bottom transverse connecting frame (25) through the reinforcing diagonal bars (26) to ensure the stability of the tank frame (1); The two ends of the tank body (2) are fixedly connected to the front frame (22) and the rear frame (23) through a secondary skirt and a main skirt respectively. The inner sides of the two top transverse connecting frames (24) are both provided with inwardly extending walkways (27) for enabling operators to operate on the top of the tank frame (1).

7. The carbon dioxide storage tank container with system monitoring function according to claim 6, characterized in that: The rear end frame (23) is provided with a rear end valve box (28), an operating platform (29) and a ladder (30); the rear end valve box (28) comprises a left door panel, a right door panel and a door panel mounting frame; the height of the door panel mounting frame is lower than the height of the rear end frame (23); the door panel mounting frame is fixedly mounted on the rear end frame (23); the left door panel and the right door panel are hinged on two sides of the door panel mounting frame; The operating platform (29) is mounted on the rear end frame (23) and is located above the rear end valve box (28). The lower end of the operating platform (29) is hinged to the upper crossbeam of the door panel mounting frame, and the upper ends of both sides thereof are connected to the upper crossbeam of the rear end frame (23) through a lifting chain. When the lifting chain is stretched to a tensioned state, the operating platform (29) is perpendicular to the rear end frame (23); when the lifting chain is retracted, the operating platform (29) is parallel to the rear end frame (23). A door lock assembly is also provided between the upper end of the operating platform (29) and the upper crossbeam of the rear end frame (23) for closing or opening the operating platform (29); The ladder (30) is fixed to one side of the rear end frame (23) and is used for an operator to climb from the bottom of the tank container frame (1) to the top thereof to perform operations; A safety rope (31) is connected between the upper cross beams at the top of the front frame (22) and the rear frame (23) to ensure the life safety of the operator.

8. The carbon dioxide storage tank container with system monitoring function according to claim 7, characterized in that: The outlet end of the venting pipeline (14) is located at the top of the main charging and discharging pipeline (4), and an anti-blocking structure (32) is provided on the outlet end to prevent ice blockage inside the main charging and discharging pipeline (4), which may lead to safety accidents caused by poor pressure release of the tank or pipeline; The anti-clogging structure (32) comprises a transverse through pipe, a U-shaped through pipe and a vertical through pipe which are sequentially connected to the outlet end of the venting pipeline (14), wherein the opening end of the U-shaped through pipe faces upwards and is used to prevent liquid or impurities from flowing back into the venting pipeline (14).

9. The carbon dioxide storage tank container with system monitoring function according to claim 8, characterized in that: A heat preservation component (35) is also provided on the outer surface of the tank body (2) for heat preservation and protection of the tank body (2); The thermal insulation component (35) comprises a foamed thermal insulation layer and a thermal insulation skin which are sequentially arranged on the outer surface of the tank body (2) from the inside to the outside, and the thermal insulation skin is fixed to the tank body (2) by a thermal insulation fixing belt; The foam insulation layer is a polyurethane foam layer, and the insulation skin is an aluminum color plate insulation skin; A manhole is provided at the front end cover of the tank container body (2) for operators to inspect and repair the inside of the tank body.

10. The carbon dioxide storage tank container with system monitoring function according to claim 9, characterized in that: The front end frame (22) is provided with a front end valve box (33), the front end valve box (33) comprises a front end valve frame and a front door plate fixed on the front end frame (22), an upper crossbeam of the front end valve frame is hinged to the upper end of the front door plate, and a door lock assembly is provided between the lower crossbeam of the front end valve frame and the lower end of the front door plate; A mirror observation plate (34) is provided on the outer side wall at the front end of the tank body (2) at the upper end of the auxiliary gas phase pipeline (13) for observing the opening indication of the electric control valve on the auxiliary gas phase pipeline (13).

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