Ice blockage preventing device for carbon dioxide conveying pipeline

Abstract

The utility model discloses an ice blockage preventing device for a carbon dioxide conveying pipeline, and belongs to the technical field of safety detection of carbon dioxide long-distance conveying pipelines. According to the method, the carbon dioxide long-distance pipeline is divided into a plurality of monitoring sections at equal intervals for monitoring, so that the fault monitoring range is quickly narrowed; the head end data collector and the tail end data collector collect temperature data and pressure wave signals through the data collectors at the two ends of the monitoring section and send the temperature data and the pressure wave signals to the central control center for analysis and processing, and an ice blockage detection result is determined. And the wind and light heating module is controlled by the central control center according to a detection result, so that indirect control on the heating sleeve is realized, and ice blockage is eliminated through heat energy of the heating sleeve. Compared with the prior art, manual participation is reduced, the efficiency is improved, and the cost of human resources is saved; the ice blockage is eliminated through the heating sleeve, excavation of the carbon dioxide buried pipeline is avoided, the ice blockage eliminating work is simplified, and the ice blockage eliminating efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety detection of long-distance carbon dioxide pipelines, and in particular relates to an anti-icing and blocking device for carbon dioxide transmission pipelines. Background Art

[0002] During the transportation of long-distance carbon dioxide pipelines, ice blockages are prone to occur. Since carbon dioxide pipelines are primarily buried after commissioning, ice blockages are difficult to address directly. Existing methods for detecting and addressing ice blockages often rely on manual searches to identify ice blockages. Once the ice blockage is located, the nearby carbon dioxide pipeline is excavated and the ice is removed through methods such as hot water spraying and temporary external electric heating. In severe cases, production may even need to be stopped for cleaning. This maintenance work is labor-intensive, inefficient, and subject to constraints imposed by construction conditions.

[0003] In summary, existing methods for preventing and controlling ice blockage in carbon dioxide pipelines have problems such as difficulty in positioning and low elimination efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a device for preventing ice blockage in a carbon dioxide delivery pipeline in view of the above-mentioned deficiencies in the prior art, which has a novel and reasonable design, a simple structure, strong practicality and is easy to promote and use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A carbon dioxide transmission pipeline anti-icing and blockage device includes a central control center, a head-end data collector and a terminal data collector respectively disposed at both ends of a monitoring section of the carbon dioxide pipeline, a first temperature flowmeter for collecting head-end temperature data, a first pressure detector for collecting head-end pressure wave data, a second temperature flowmeter for collecting terminal temperature data, a second pressure detector for collecting terminal pressure wave data, a wind-solar heating module, a heating sleeve disposed on the carbon dioxide pipeline, and a wind-solar power generation assembly for powering the heating sleeve;

[0007] The central control center is respectively connected to the head-end data collector, the terminal data collector and the wind-solar heating module, and the wind-solar heating module is connected to the heating sleeve;

[0008] The head-end data collector is respectively connected to the first pressure detector and the first temperature flow meter for data transmission to obtain the temperature data and pressure wave data of the head-end; the terminal data collector (8) is respectively connected to the second pressure detector and the second temperature flow meter to obtain the temperature data and pressure wave data of the terminal; the head-end data collector and the terminal data collector are used to send the obtained pressure wave data and temperature data to the central control center;

[0009] The central control center is used to determine whether the carbon dioxide pipeline is blocked by ice based on the received pressure wave data and temperature data, and to control the heating of the wind and solar heating module when ice blockage occurs in the carbon dioxide pipeline;

[0010] The carbon dioxide pipeline is divided into multiple monitoring sections according to set intervals.

[0011] Furthermore, it also includes a first optical terminal and a second optical terminal; the first optical terminal is communicatively connected to the head-end data collector, the second optical terminal is communicatively connected to the end-end data collector, and the first optical terminal and the second optical terminal are connected via an optical cable laid on the carbon dioxide pipeline;

[0012] The central control center sends an optical inspection signal to the optical cable via the head-end data collector and the first optical terminal, and receives a first optical signal returned by the optical cable via the first optical terminal and the head-end data collector, and a second optical signal returned via the second optical terminal and the end-end data collector; the central control center determines whether the carbon dioxide pipeline is blocked by ice based on the first optical signal and the second optical signal.

[0013] Furthermore, the wind-solar power generation component includes a wind turbine, a solar panel, a battery and an inverter; the wind turbine and the solar panel are connected to the battery through wires, and the battery is used to store the electricity converted by the wind turbine and the solar panel; the battery is connected to the heating sleeve for power supply through the inverter.

[0014] Furthermore, it also includes a temperature control component for connecting to the wind and solar heating module, the temperature control component is used to control the temperature of the heating sleeve, and the temperature control component is controlled and connected to the controller of the battery.

[0015] Furthermore, the heating sleeve is arranged at a section of the carbon dioxide pipeline where accidents are prone to occur.

[0016] Furthermore, the accident-prone sections of the carbon dioxide pipeline are high-drop sections and equipment-intensive sections of the carbon dioxide pipeline, and the equipment includes a pressure regulating valve.

[0017] Furthermore, a graphene layer for heat conduction is provided on the inner side of the thermal insulation layer of the heating sleeve.

[0018] Furthermore, the outer side of the insulation layer of the heating sleeve is covered with alumina ceramics.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The present invention's carbon dioxide transmission pipeline anti-icing and blocking device divides the carbon dioxide pipeline into multiple monitoring sections for monitoring, thereby facilitating and quickly narrowing the fault monitoring range. The device collects pressure wave data at data collectors at both ends of the monitoring section, and calculates the pressure sensor data information received by the central control center to monitor and locate pipeline ice blockages. The device controls the wind and solar heating module based on the monitoring results, thereby indirectly controlling the heating sleeve and eliminating ice blockages through the heat energy of the heating sleeve. Compared to existing technologies, the present invention reduces manual intervention, thereby improving efficiency and saving human resource costs. By eliminating ice blockages through pre-set heating sleeves, there is no need to excavate the perimeter of the carbon dioxide pipeline to eliminate ice blockages, simplifying the ice blockage elimination process and further improving the efficiency of eliminating ice blockages.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of an embodiment of a device for preventing ice blockage in a carbon dioxide delivery pipeline according to the present invention;

[0023] Figure 2 This is a schematic structural diagram of a wind-solar heating module of an embodiment of the carbon dioxide delivery pipeline anti-icing and blocking device of the present utility model;

[0024] Figure 3 This is a schematic diagram of the ice blockage monitoring and positioning principle of the carbon dioxide transmission pipeline anti-ice blockage device embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of a heating sleeve section of a carbon dioxide pipeline according to an embodiment of the carbon dioxide delivery pipeline anti-icing and blocking device of the present invention;

[0026] Description of the accompanying drawings:

[0027] 1. Central control center; 2. Head-end data collector; 3. First temperature flow meter;

[0028] 4. First pressure detector; 5. First optical terminal; 6. Wind and solar heating module; 7. Heating sleeve;

[0029] 8. Terminal data collector; 9. Second pressure detector; 10. Second temperature flow meter;

[0030] 11. Second optical terminal; 12. Carbon dioxide pipeline. DETAILED DESCRIPTION

[0031] Example of a device for preventing ice blockage in a carbon dioxide transmission pipeline:

[0032] like Figure 1-Figure 4As shown, the carbon dioxide transmission pipeline anti-icing and blockage device includes a central control center 1, a head-end data collector 2 and a terminal data collector 8 respectively installed at both ends of the monitoring section of the carbon dioxide pipeline 12, a first temperature flowmeter 3 for collecting head-end temperature data, a first pressure detector 4 for collecting head-end pressure wave data, a second temperature flowmeter 10 for collecting terminal temperature data, a second pressure detector 9 for collecting terminal pressure wave data, a wind-solar heating module 6, a heating sleeve 7 installed on the carbon dioxide pipeline 12, and a wind-solar power generation component for powering the heating sleeve 7. Specifically, the central control center 1 is respectively connected to the head-end data collector 2, the terminal data collector 8, and the wind-solar heating module 6; the head-end data collector 2 and the terminal data collector 8 are connected to the central control center 1 via pipelines or radio signals. The wind-solar heating module 6 is connected to the heating sleeve 7.

[0033] The head-end data collector 2 is connected to the first pressure detector 4 and the first temperature flowmeter 3 for data transmission to obtain head-end temperature and pressure wave data. The terminal data collector 8 is connected to the second pressure detector 9 and the second temperature flowmeter 10 to obtain terminal temperature and pressure wave data. The head-end data collector 2 and the terminal data collector 8 are used to transmit the obtained pressure wave and temperature data to the central control center 1. Preferably, the heating sleeves 7 should be spaced at least 20 meters apart; the heating power of a single heating sleeve 7 is 40 watts.

[0034] The central control center 1 is used to determine whether the carbon dioxide pipeline 12 is ice-blocked based on the received pressure wave data and temperature data, and to control the heating of the wind-solar heating module 6 when ice-blocked carbon dioxide pipeline 12 occurs. Determining ice blockage based on the received pressure wave data and temperature data is a prior art.

[0035] Specifically, the acquired pressure wave propagation velocity is corrected using the acquired temperature data, and the correction formula is:

[0036] v=v0+0.607×Q

[0037] Where v is the corrected pressure wave propagation velocity, v0 is the pressure wave velocity at zero degrees, and Q is the actual temperature (degrees Celsius).

[0038] The formula for calculating the pressure wave velocity at zero degrees is:

[0039]

[0040] Where v0 is the pressure wave velocity at zero degrees, in m / s; k is the volume expansion coefficient of the liquid, in pa; p is the density of the liquid, in kg / m 3; e represents the elasticity of the pipeline material, in pa; d represents the diameter of the pipeline, in m; b represents the wall thickness of the carbon dioxide pipeline 12, in m; c1 represents the correction coefficient related to the constraint conditions of the carbon dioxide pipeline 12.

[0041] When ice blockage occurs, the head end of the carbon dioxide pipe 12 continuously inputs carbon dioxide, while the tail end does not receive carbon dioxide, or only receives a trace amount of carbon dioxide. At this time, the carbon dioxide input from the head end will occasionally impact the ice blockage location, causing vibration, sound, and forming sound waves. In other words, when ice blockage occurs, the pressure detector can detect a specific pressure wave. Based on the time difference between the pressure wave's propagation to the head end and the tail end and the pressure wave's propagation speed, the location of the ice blockage can be calculated.

[0042] Specifically, in Figure 3 In the example, the total length of the monitored section is L, the ice blockage point is Z, the distance from Z to the head end is A, and the distance from Z to the tail end is B. The first pressure detector 4 detects the pressure wave at time T1, and the second pressure detector 9 detects the pressure wave at time T2. Therefore, the distance from the head end of the CO2 pipeline 12 to the leak point Z can be expressed as:

[0043]

[0044] Where v is the corrected pressure wave propagation velocity, ΔT = T2 - T1, and the corresponding B is equal to LA.

[0045] To improve the reliability of ice blockage detection results, the present application not only relies on pressure waves for detection, but also uses optical cable signals for ice blockage detection. Specifically, it also includes a first optical terminal 5 and a second optical terminal 11; the first optical terminal 5 is communicatively connected to the head-end data collector 2, and the second optical terminal 11 is communicatively connected to the end-end data collector 8. The first and second optical terminals 5 and 11 are connected via an optical cable laid along the carbon dioxide pipeline 12. The central control center 1 transmits an optical inspection signal to the optical cable via the head-end data collector and the first optical terminal 5, and receives a first optical signal returned by the optical cable via the first optical terminal 5 and the head-end data collector 2, and a second optical signal returned via the second optical terminal 11 and the end-end data collector 8. The central control center 1 determines whether ice blockage exists in the carbon dioxide pipeline 12 based on the first and second optical signals. In other words, by systematically analyzing changes in the phase and polarization state of the received first and second optical signals, the presence of ice blockage can be determined. Specifically, the method of analyzing ice blockage through optical signals is an existing technology, which can be referred to Liu Liang, Zhao Bao, and Zhang Nannan. Application of distributed optical fiber sensors in ice blockage positioning in long-distance natural gas pipelines [J]. China Petroleum and Chemical Standards and Quality, 2020(017):040.

[0046] To quickly locate the faulty section and reduce the requirements on the central control center 1, the CO2 pipeline 12 is divided into multiple monitoring sections at set intervals. This segmented monitoring of the CO2 pipeline 12 ensures accurate ice blockage location. Preferably, the interval is 10 km.

[0047] like Figure 2 As shown, since the CO2 pipeline 12 is typically installed outdoors, the wind-solar power generation assembly 6 includes a wind turbine, solar panels, batteries, and an inverter. Providing power to the heating sleeve 7 through the wind turbine and solar panels is not only energy-efficient and environmentally friendly, but also reduces the cost of laying power lines. Specifically, the wind turbine and solar panels are connected to the battery via electrical wires. The battery is used to store the electricity converted by the wind turbine and solar panels. The battery is then connected to the heating sleeve 7 via the inverter.

[0048] To improve ice blockage removal efficiency, a temperature control assembly is included for detecting the temperature of the CO2 pipeline 12 at the heating sleeve 7. This temperature control assembly is controllably connected to the battery controller. The temperature control assembly controls the battery's discharge, thereby controlling the temperature of the heating sleeve 7. This allows the heating sleeve 7 to release varying amounts of heat based on specific needs, ensuring efficient ice blockage removal.

[0049] To reduce the number of wind power heating modules 5 installed without compromising detection effectiveness, the wind power heating modules 6 are installed in accident-prone sections of the CO2 pipeline 12. This placement ensures the effectiveness of ice blockage location and elimination, conserving resources. Specifically, these accident-prone sections of the CO2 pipeline 12 are high-drop sections and sections with dense equipment, including a pressure-regulating valve.

[0050] In order to enhance the heat energy transfer efficiency of the heating sleeve 7. The heating sleeve 7 is composed of a graphene layer, a thermal insulation layer, and an alumina ceramic layer from the inside to the outside. Due to the physical properties of carbon dioxide, ice blockage accidents occur quickly and cause great harm. Graphene material is selected as the conductive medium. With its good electrical conductivity and excellent thermal conductivity, the pipeline can be quickly heated to the preset temperature; the thermal insulation layer prevents rapid temperature loss. The outer covering material is selected from alumina ceramic due to its light weight, wear resistance and pressure resistance, high melting point, and stable insulation. By increasing thermal conductivity, the efficiency of eliminating ice blockage is improved.

[0051] The device can not only locate ice blockages and eliminate ice blockages, but can also be used to prevent ice blockages. When the temperature is low, the central control center 1 controls the battery to power the heating sleeve 7, and the heat energy of the heating sleeve 7 prevents ice blockages from forming on the carbon dioxide pipeline 12.

[0052] Each embodiment in this specification is described in a related manner. Similar parts between the embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A device for preventing ice blockage in a carbon dioxide delivery pipeline, characterized in that: The invention comprises a central control center (1), a head-end data collector (2) and a terminal data collector (8) respectively arranged at both ends of a monitoring section of a carbon dioxide pipeline (12), a first temperature flow meter (3) for collecting head-end temperature data, a first pressure detector (4) for collecting head-end pressure wave data, a second temperature flow meter (10) for collecting terminal temperature data, a second pressure detector (9) for collecting terminal pressure wave data, a wind-solar heating module (6), a heating sleeve (7) for being arranged on the carbon dioxide pipeline (12), and a wind-solar power generation component for supplying power to the heating sleeve (7); The central control center (1) is respectively connected to the head-end data collector (2), the end-end data collector (8) and the wind-solar heating module (6), and the wind-solar heating module (6) is connected to the heating sleeve (7); The head-end data collector (2) is respectively connected to the first pressure detector (4) and the first temperature flow meter (3) for data transmission to obtain temperature data and pressure wave data of the head-end; the terminal data collector (8) is respectively connected to the second pressure detector (9) and the second temperature flow meter (10) to obtain temperature data and pressure wave data of the terminal; the head-end data collector (2) and the terminal data collector (8) are used to send the obtained pressure wave data and temperature data to the central control center (1); The central control center (1) is used to determine whether the carbon dioxide pipeline (12) is blocked by ice based on the received pressure wave data and temperature data, and to control the heating of the wind and solar heating module (6) when ice blockage occurs in the carbon dioxide pipeline (12); The carbon dioxide pipeline (12) is divided into multiple monitoring sections according to set intervals.

2. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 1, characterized in that: It also includes a first optical terminal (5) and a second optical terminal (11); The first optical terminal (5) is in communication connection with the head-end data collector (2), the second optical terminal (11) is in communication connection with the end-end data collector (8), and the first optical terminal (5) and the second optical terminal (11) are connected via an optical cable laid on the carbon dioxide pipeline (12); The central control center (1) sends an optical inspection signal to the optical cable via the head-end data collector and the first optical terminal (5), and receives a first optical signal returned by the optical cable via the first optical terminal (5) and the head-end data collector (2), and a second optical signal returned via the second optical terminal (11) and the end-end data collector (8); the central control center (1) determines whether the carbon dioxide pipeline (12) is blocked by ice based on the first optical signal and the second optical signal.

3. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 1, characterized in that: The wind-solar power generation assembly includes a wind turbine, a solar panel, a battery and an inverter; The wind turbine generator and the solar panel are both connected to a storage battery via electric wires. The storage battery is used to store the electricity converted by the wind turbine generator and the solar panel. The storage battery is connected to the heating sleeve (7) for power supply via an inverter.

4. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 3, characterized in that: It also includes a temperature control component for connecting to the wind and solar heating module (6), the temperature control component is used to control the temperature of the heating sleeve (7), and the temperature control component is connected to the controller of the battery.

5. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 1, characterized in that: The heating sleeve (7) is arranged at an accident-prone section of the carbon dioxide pipeline (12).

6. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 5, characterized in that: The accident-prone section of the carbon dioxide pipeline (12) is a high-drop section and a device-intensive section of the carbon dioxide pipeline (12), and the device includes a pressure regulating valve.

7. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 1, characterized in that: A graphene layer for heat conduction is provided on the inner side of the heat insulation layer of the heating sleeve (7).

8. The device for preventing ice blockage in a carbon dioxide transmission pipeline according to claim 1, characterized in that: The outer side of the heat-insulating layer of the heating sleeve (7) is covered with alumina ceramics.

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