Storage tank online real-time protection system

Abstract

The utility model discloses a storage tank on-line real-time protection system which comprises a PLC control unit, a weather early warning system, a nitrogen making unit and a gas detection part, the output end of the weather early warning system and the output end of the gas detection part are electrically connected with the input end of the PLC control unit, the output end of the PLC control unit is electrically connected with the input end of the nitrogen making unit, and the output end of the PLC control unit is electrically connected with the input end of the nitrogen making unit. The output end of the nitrogen generation unit is electrically connected with the input end of the gas detection part; the gas detection part comprises a tank area, a plurality of storage tank pipe walls are arranged on the outer wall of one side of the tank area, a secondary sealing scraper is arranged on the outer wall of one side of each storage tank pipe wall, and a sensor connector is arranged on the outer wall of one side of each secondary sealing scraper.

Description

Technical Field

[0001] The utility model relates to the technical field of crude oil storage, in particular to an online real-time protection system for storage tanks. Background Art

[0002] Crude oil is a flammable and explosive dangerous good with great fire risks. Since 1950, there have been more than 500 tank fire accidents worldwide. According to API statistics, fire accidents caused by seals account for 72.8%, and lightning strikes are the main cause of seal fires. At present, both mechanically sealed tanks and soft-sealed tanks are at risk of seal explosion and fire. The main preventive measures are water sprinkler system cooling, foam fire extinguishing system, fire truck fire extinguishing, etc. However, these devices are only activated after the fire occurs, and cannot achieve early monitoring and early warning of accident signs. They are passive fire fighting after the fire, so the actual effect is difficult to predict.

[0003] For example, a tank inerting active protection system with application number CN202020465407.2 and authorization announcement date 20201229 includes a DCS control center, a management workstation, multiple field monitoring stations and multiple inerting protection stations. The inerting protection stations correspond to the field monitoring stations one by one. The management workstation is connected to the DCS control center through a local area network. The inerting protection station is used to inject inert gas into the tank. The field monitoring station is used to collect the concentration of harmful gases inside the tank and generate a concentration signal, and transmit the concentration signal to the management workstation at the same time. When the concentration of harmful gases exceeds the set value, the field monitoring station controls the inerting protection station to start injecting inert gas into the tank. This system can start the on-site environmentalization function by performing real-time online analysis of the flammable, explosive, toxic and harmful body components in the gas phase space / confined space inside the tank, and perform environmentalized gas protection on the gas phase space / confined space of the tank. At the same time, this system can be remotely maintained, which greatly improves the level of automated management of safe operation of the tank and has low maintenance costs.

[0004] The traditional way for storage tanks to deal with lightning weather is that after receiving a lightning warning signal, the operator uses a portable combustible gas detector to test the combustible gas concentration in the tank sealing ring. If it exceeds the lower explosion limit, a wooden board is used to open a certain gap between the secondary seal and the tank wall to reduce the combustible gas concentration in the sealing ring through air convection. However, the above process can only perform detection and analysis point by point, and does not have multiple input and signal processing functions. In addition, manual data collection and analysis is time-consuming and labor-intensive, with slow response speed and low efficiency, and it is difficult to reflect working condition information in a timely manner. Therefore, it is urgent to design an online real-time protection system for storage tanks to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an online real-time protection system for a storage tank to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An online real-time protection system for a storage tank comprises a PLC control unit, a weather warning system, a nitrogen generator unit and a gas detection part, wherein the output end of the weather warning system and the gas detection part are electrically connected to the input end of the PLC control unit, the output end of the PLC control unit is electrically connected to the input end of the nitrogen generator unit, and the output end of the nitrogen generator unit is electrically connected to the input end of the gas detection part;

[0008] The gas detection part includes a tank area, a plurality of tank pipe walls are arranged on the outer wall of one side of the tank area, a primary seal is arranged inside the tank pipe wall, and the primary seal divides the inside of the tank pipe wall into two areas: an oil and gas space and a sealed space. A secondary sealing scraper is arranged on the outer wall of one side of the tank pipe wall, and a microcirculation system is arranged on the outer side of the secondary sealing scraper;

[0009] The microcirculation system includes a sensor joint, which is installed on the outer wall of one side of the secondary sealing scraper. A support leg is installed on the outer wall of one side of the tank pipe wall by bolts, and a gas detector is provided on the outer wall of one side of the top of the support leg. An exhaust metal hose and an exhaust metal hose are respectively connected to the outer wall of one side of the gas detector, and the other ends of the exhaust metal hose and the exhaust metal hose are connected to the sensor joint.

[0010] Furthermore, connecting wires are provided between the pipe walls of the plurality of storage tanks, and the connecting wires are connected to the wiring terminals of the gas detector.

[0011] Furthermore, the nitrogen generating unit comprises a base plate and a nitrogen storage tank. A plurality of nitrogen generating tanks are arranged on the outer wall of the top of the base plate, and the plurality of nitrogen generating tanks are connected together by pipelines. The nitrogen storage tank is connected to one of the nitrogen generating tanks by a pipeline.

[0012] Furthermore, a delivery pipe is inserted into the outer wall of one side of the nitrogen storage tank, and the other end of the delivery pipe is connected to the pipe walls of multiple storage tanks through the pipeline.

[0013] According to the claim, an online real-time protection system for storage tanks is characterized in that an air compressor is installed on the outer wall on one side of the top of the bottom plate by bolts, and the air compressor is connected to one of the nitrogen production tanks through a pipeline.

[0014] Furthermore, the weather warning system is a lightning weather warning system, and the signal of the weather warning system is transmitted to the PLC control unit via a network signal.

[0015] Furthermore, an opening is provided on one side of the top of the secondary sealing scraper, and the sensor connector is installed at the opening.

[0016] Furthermore, the gas detector is a flameproof oil and gas concentration detector, an oxygen concentration detector and a nitrogen concentration detector, and a sensor is provided inside the gas detector, and the sensor has a built-in air pump.

[0017] In the above technical scheme, the utility model provides an online real-time protection system for storage tanks, which has the following beneficial effects:

[0018] (1) Through the weather warning system and gas detector, the weather warning system can monitor the weather and predict thunderstorms, while the gas detector can automatically monitor the internal conditions of the tank wall and realize real-time monitoring of the tank wall, thereby predicting the potential explosion hazard in the sealing ring of the tank wall, making it convenient for workers to take corresponding measures for inert protection and timely ensure the safety of the tank wall.

[0019] (2) Through the PLC control unit and nitrogen generator set, according to the monitoring of the weather warning system and gas detector, the PLC control unit will control the operation of the nitrogen generator set, so that nitrogen flows into the tank wall, greatly improving the explosion-proof and explosion-suppression capabilities of the tank wall itself.

[0020] (3) A secondary sealing scraper and a sensor joint are provided. An opening is provided on the secondary sealing scraper. The opening is provided at the edge-sealed secondary scraper. This method can avoid hot work. A hole is opened on the XPE or rubber material to fix the sensor joint interface. The sensor joint has a built-in air pump, which can force the gas in the oil and gas space to circulate, so as to achieve the purpose of full detection. The sensor joint is a fiber optic sensor, which can realize the intrinsic safety monitoring of the tank pipe wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 The present invention is a schematic diagram of the overall structure of a system provided in accordance with an embodiment of an online real-time protection system for storage tanks.

[0023] Figure 2 A schematic diagram of the top view structure of the gas detection part provided in an embodiment of an online real-time protection system for storage tanks of the utility model.

[0024] Figure 3 A schematic diagram of a storage tank pipe wall structure provided in an embodiment of an online real-time protection system for storage tanks of the utility model.

[0025] Figure 4A schematic structural diagram of a nitrogen generator unit provided in an embodiment of an online real-time protection system for storage tanks of the utility model.

[0026] Description of reference numerals:

[0027] 1. PLC control unit; 2. Weather warning system; 3. Nitrogen generator; 4. Gas detection part; 5. Tank area; 6. Storage tank pipe wall; 7. Connecting line; 8. Secondary sealing scraper; 9. Support leg; 10. Gas detector; 11. Suction metal hose; 12. Exhaust metal hose; 13. Sensor connector; 14. Bottom plate; 15. Air compressor; 16. Nitrogen generator; 17. Nitrogen storage tank; 18. Delivery pipe; 19. Primary seal. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-4 As shown, an online real-time protection system for a storage tank provided by an embodiment of the utility model includes a PLC control unit 1, a weather warning system 2, a nitrogen generator unit 3 and a gas detection part 4, the output end of the weather warning system 2 and the gas detection part 4 are electrically connected to the input end of the PLC control unit 1, the output end of the PLC control unit 1 is electrically connected to the input end of the nitrogen generator unit 3, and the output end of the nitrogen generator unit 3 is electrically connected to the input end of the gas detection part 4;

[0030] The gas detection part 4 includes a tank area 5, a plurality of tank pipe walls 6 are arranged on the outer wall of one side of the tank area 5, a primary seal 19 is arranged inside the tank pipe wall 6, and the primary seal 19 divides the inside of the tank pipe wall 6 into two areas: an oil and gas space and a sealed space. A secondary sealing scraper 8 is arranged on the outer wall of one side of the tank pipe wall 6, and a microcirculation system is arranged on the outer side of the secondary sealing scraper 8;

[0031] The microcirculation system includes a sensor joint 13, which is installed on the outer wall of one side of the secondary sealing scraper 8. A support leg 9 is installed on the outer wall of one side of the tank pipe wall 6 by bolts, and a gas detector 10 is provided on the outer wall of one side of the top of the support leg 9. An exhaust metal hose 11 and an exhaust metal hose 12 are respectively connected to the outer wall of one side of the gas detector 10, and the other ends of the exhaust metal hose 11 and the exhaust metal hose 12 are connected to the sensor joint 13.

[0032] Specifically, in this embodiment, a PLC control unit 1, a weather warning system 2, a nitrogen generator unit 3 and a gas detection part 4 are included, the output end of the weather warning system 2 and the gas detection part 4 are electrically connected to the input end of the PLC control unit 1, the output end of the PLC control unit 1 is electrically connected to the input end of the nitrogen generator unit 3, and the output end of the nitrogen generator unit 3 is electrically connected to the input end of the gas detection part 4;

[0033] The gas detection part 4 includes a tank area 5, and a plurality of tank pipe walls 6 are arranged on the outer wall of one side of the tank area 5. The inside of the tank pipe wall 6 is divided into two areas: an oil and gas space and a sealed space. A secondary sealing scraper 8 is arranged on the outer wall of one side of the tank pipe wall 6. An opening is arranged on the secondary sealing scraper 8. The opening is opened at the secondary scraper with edge sealing. This method can avoid hot work. A hole is opened on the XPE or rubber material to fix the sensor connector 13 interface, and a sensor connector 13 is arranged on the outer wall of one side of the secondary sealing scraper 8. A support leg 9 is installed on the outer wall of one side of the tank pipe wall 6 by bolts, and a gas detector 10 is arranged on the outer wall of one side of the top of the support leg 9. The gas detector 10 is an explosion-proof oil and gas concentration detector, an oxygen concentration detector and a nitrogen concentration detector. The gas detector 10 is provided inside The sensor has an air pump built in it, which can force the gas in the oil and gas space to circulate, so as to achieve the purpose of full detection. The sensor is an optical fiber sensor, which can realize intrinsically safe monitoring of the tank pipe wall 6. The outer wall on one side of the gas detector 10 is respectively connected with an exhaust metal hose 11 and an exhaust metal hose 12. When the gas detector 10 is detecting, the oil and gas inside the tank pipe wall 6 will enter the gas detector 10 through the exhaust metal hose 11, and the oil and gas after detection will flow back into the tank pipe wall 6 through the exhaust metal hose 12, and the other ends of the exhaust metal hose 11 and the exhaust metal hose 12 are connected to the sensor connector 13, and a connecting line 7 is provided between multiple tank pipe walls 6, and the connecting line 7 is connected to the wiring terminal of the gas detector 10.

[0034] The utility model provides an online real-time protection system for storage tanks. The weather warning system 2 can monitor the weather, thereby predicting thunderstorms, and the gas detector 10 can automatically monitor the internal conditions of the storage tank pipe wall 6, realizing real-time monitoring of the storage tank pipe wall 6, thereby predicting potential explosion hazards in the sealing ring of the storage tank pipe wall 6, making it convenient for workers to take corresponding measures for inert protection and timely ensure the safety of the storage tank pipe wall 6.

[0035] In one embodiment provided by the present utility model, Figure 4As shown, the nitrogen making unit 3 includes a base plate 14 and a nitrogen storage tank 17. A plurality of nitrogen making tanks 16 are arranged on the outer wall at the top of the base plate 14, and the plurality of nitrogen making tanks 16 are connected together by pipelines. The nitrogen storage tank 17 is connected to one of the nitrogen making tanks 16 through a pipeline. A delivery pipe 18 is inserted into the outer wall on one side of the nitrogen storage tank 17. The delivery pipe 18 facilitates the flow of nitrogen into the storage tank pipe wall 6, and the other end of the delivery pipe 18 is connected to the plurality of storage tank pipe walls 6 through the pipeline; an air compressor 15 is installed on the outer wall on one side of the top of the base plate 14 by bolts. The air compressor 15 can compress the air to facilitate the nitrogen making of the air nitrogen making tank 16, and the air compressor 15 is interconnected with one of the nitrogen making tanks 16 through a pipeline.

[0036] In another embodiment provided by the present utility model, Figure 1 As shown, the weather warning system 2 is a lightning weather warning system, which can provide thunderstorm weather information, and then feed it back to the PLC control unit 1, send an adjustment signal to the nitrogen production system, so that the tank pipe wall 6 forms an inert environment to prevent fire, and the signal of the weather warning system 2 is transmitted to the PLC control unit 1 via a network signal.

[0037] In another embodiment provided by the present utility model, Figure 3 As shown, an opening is provided on one side of the top of the secondary sealing scraper 8, and the opening facilitates the installation of the sensor connector 13 on the secondary sealing scraper 8. The sensor connector 13 is installed at the opening. The gas detector 10 is an explosion-proof oil and gas concentration detector, an oxygen concentration detector and a nitrogen concentration detector. The explosion-proof oil and gas concentration detector, the oxygen concentration detector and the nitrogen concentration detector can monitor the oil and gas concentration, oxygen concentration and nitrogen concentration inside the tank pipe wall 6. A sensor is provided inside the gas detector 10, and the sensor has a built-in air pump. The air pump can force the circulation of gas in the oil and gas space to achieve the purpose of full detection. In combination with the oil and gas concentration of the tank pipe wall 6, according to the threshold range of different gas concentrations of the tank pipe wall 6, the nitrogen generator unit 3 is started, and an adjustment signal is sent to the nitrogen generation system to form an inert environment on the tank pipe wall 6 to reduce safety risks.

[0038] Example 1

[0039] An online real-time protection system for a storage tank comprises a PLC control unit 1, a weather warning system 2, a nitrogen generator unit 3 and a gas detection part 4, wherein the output ends of the weather warning system 2 and the gas detection part 4 are electrically connected to the input end of the PLC control unit 1, the output end of the PLC control unit 1 is electrically connected to the input end of the nitrogen generator unit 3, and the output end of the nitrogen generator unit 3 is electrically connected to the input end of the gas detection part 4;

[0040] The gas detection part 4 includes a tank area 5, and a plurality of tank pipe walls 6 are arranged on the outer wall of one side of the tank area 5. The inside of the tank pipe wall 6 is divided into two areas: an oil and gas space and a sealed space. A secondary sealing scraper 8 is arranged on the outer wall of one side of the tank pipe wall 6. An opening is arranged on the secondary sealing scraper 8. The opening is opened at the secondary scraper with edge sealing. This method can avoid hot work. A hole is opened on the XPE or rubber material to fix the sensor connector 13 interface, and a sensor connector 13 is arranged on the outer wall of one side of the secondary sealing scraper 8. A support leg 9 is installed on the outer wall of one side of the tank pipe wall 6 by bolts, and a gas detector 10 is arranged on the outer wall of one side of the top of the support leg 9. The gas detector 10 is an explosion-proof oil and gas concentration detector, an oxygen concentration detector and a nitrogen concentration detector. The gas detector 10 is provided inside The sensor has an air pump built in it, which can force the gas in the oil and gas space to circulate, so as to achieve the purpose of full detection. The sensor is an optical fiber sensor, which can realize intrinsically safe monitoring of the tank pipe wall 6. The outer wall on one side of the gas detector 10 is respectively connected with an exhaust metal hose 11 and an exhaust metal hose 12. When the gas detector 10 is detecting, the oil and gas inside the tank pipe wall 6 will enter the gas detector 10 through the exhaust metal hose 11, and the oil and gas after detection will flow back into the tank pipe wall 6 through the exhaust metal hose 12, and the other ends of the exhaust metal hose 11 and the exhaust metal hose 12 are connected to the sensor connector 13, and a connecting line 7 is provided between multiple tank pipe walls 6, and the connecting line 7 is connected to the wiring terminal of the gas detector 10.

[0041] Example 2

[0042] This embodiment is further limited on the basis of embodiment 1, wherein the nitrogen making unit 3 comprises a bottom plate 14 and a nitrogen storage tank 17, a plurality of nitrogen making tanks 16 are arranged on the outer wall at the top of the bottom plate 14, and the plurality of nitrogen making tanks 16 are connected together by pipelines, the nitrogen storage tank 17 is connected to one of the nitrogen making tanks 16 through a pipeline, a delivery pipe 18 is inserted into the outer wall on one side of the nitrogen storage tank 17, the delivery pipe 18 facilitates the flow of nitrogen into the storage tank pipe wall 6, and the other end of the delivery pipe 18 is connected to the plurality of storage tank pipe walls 6 through the pipeline; an air compressor 15 is installed on the outer wall on one side of the top of the bottom plate 14 by bolts, the air compressor 15 can compress the air to facilitate the nitrogen making of the air nitrogen making tank 16, and the air compressor 15 is interconnected with one of the nitrogen making tanks 16 through a pipeline; the weather warning system 2 is a lightning weather warning system, which can provide thunderstorm weather information, and then react It is fed to the PLC control unit 1, and combined with the oil and gas concentration of the tank pipe wall 6, an adjustment signal is sent to the nitrogen production system to form an inert environment on the tank pipe wall 6 to prevent fire, and the signal of the weather warning system 2 is transmitted to the PLC control unit 1 through the network signal; an opening is provided on one side of the top of the secondary sealing scraper 8, and the opening is convenient for the sensor connector 13 to be installed on the secondary sealing scraper 8, and the sensor connector 13 is installed at the opening. The gas detector 10 is an explosion-proof oil and gas concentration detector, an oxygen concentration detector and a nitrogen concentration detector. The explosion-proof oil and gas concentration detector, the oxygen concentration detector and the nitrogen concentration detector can monitor the oil and gas concentration, oxygen concentration and nitrogen concentration inside the tank pipe wall 6. A sensor is provided inside the gas detector 10, and the sensor has a built-in air pump. The air pump can force the circulation of gas in the oil and gas space to achieve the purpose of full detection.

[0043] Working principle: The weather warning system 2 can monitor the weather. When a thunderstorm occurs, the lightning warning signal issued by the weather warning system 2 will be transmitted to the PLC control unit 1 through the network signal. The PLC control unit 1 will control the gas detector 10 and the sensor connector 13 to start, so that the oil and gas inside the tank pipe wall 6 enter the gas detector 10 through the exhaust metal hose 11, and the detected oil and gas will flow back into the tank pipe wall 6 through the exhaust metal hose 12. The subsequent detection results will be transmitted to the PLC control unit 1 through the connecting line 7, and then the PLC control unit 1 will conduct a comprehensive analysis of various information through its internal algorithm, and send out control information to control the nitrogen generator unit 3. Subsequently, the nitrogen generator unit 3 will deliver nitrogen into the tank pipe wall 6 through the delivery pipe 18, so that an inert environment is formed in the tank pipe wall 6, thereby preventing fire.

[0044] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A storage tank online real-time protection system, comprising a PLC control unit (1), a weather warning system (2), a nitrogen generator (3) and a gas detection part (4), characterized in that: The output ends of the weather warning system (2) and the gas detection part (4) are electrically connected to the input end of the PLC control unit (1), the output end of the PLC control unit (1) is electrically connected to the input end of the nitrogen generator (3), and the output end of the nitrogen generator (3) is electrically connected to the input end of the gas detection part (4); The gas detection part (4) comprises a tank area (5), a plurality of tank pipe walls (6) are provided on the outer wall of one side of the tank area (5), a primary seal (19) is provided inside the tank pipe wall (6), and the primary seal (19) divides the inside of the tank pipe wall (6) into two areas, namely, an oil and gas space and a sealed space; a secondary sealing scraper (8) is provided on the outer wall of one side of the tank pipe wall (6), and a microcirculation system is provided on the outer side of the secondary sealing scraper (8); The microcirculation system comprises a sensor joint (13), wherein the sensor joint (13) is mounted on the outer wall of one side of the secondary sealing scraper (8), a support leg (9) is mounted on the outer wall of one side of the storage tank pipe wall (6) by means of bolts, and a gas detector (10) is provided on the outer wall of one side of the top of the support leg (9), and an exhaust metal hose (11) and an exhaust metal hose (12) are respectively plugged into the outer wall of one side of the gas detector (10), and the other ends of the exhaust metal hose (11) and the exhaust metal hose (12) are plugged into the sensor joint (13).

2. The online real-time protection system for storage tanks according to claim 1 is characterized in that: A connecting line (7) is provided between the plurality of storage tank pipe walls (6), and the connecting line (7) is connected to a wiring terminal of a gas detector (10).

3. The online real-time protection system for storage tanks according to claim 1 is characterized in that: The nitrogen generating unit (3) comprises a bottom plate (14) and a nitrogen storage tank (17); a plurality of nitrogen generating tanks (16) are arranged on the top outer wall of the bottom plate (14); the plurality of nitrogen generating tanks (16) are connected together through pipelines; and the nitrogen storage tank (17) is connected to one of the nitrogen generating tanks (16) through a pipeline.

4. The online real-time protection system for storage tanks according to claim 3 is characterized in that: A delivery pipe (18) is inserted into the outer wall of one side of the nitrogen storage tank (17), and the other end of the delivery pipe (18) is connected to a plurality of storage tank pipe walls (6) through a pipeline.

5. The online real-time protection system for storage tanks according to claim 3 is characterized in that: An air compressor (15) is installed on the outer wall of one side of the top of the bottom plate (14) by means of bolts, and the air compressor (15) is connected to one of the nitrogen production tanks (16) through a pipeline.

6. The online real-time protection system for storage tanks according to claim 1 is characterized in that: The weather warning system (2) is a lightning weather warning system, and the signal of the weather warning system (2) is transmitted to the PLC control unit (1) via a network signal.

7. The online real-time protection system for storage tanks according to claim 1 is characterized in that: An opening is provided on one side of the top of the secondary sealing scraper (8), and the sensor connector (13) is installed at the opening.

8. The online real-time protection system for storage tanks according to claim 1 is characterized in that: The gas detector (10) is a flameproof oil and gas concentration detector, an oxygen concentration detector and a nitrogen concentration detector. A sensor is provided inside the gas detector (10), and the sensor has an air pump built in it.

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