Protective system for liquefied hydrocarbon storage tank
By introducing components such as cavity design, circulating water coils, water mist nozzles, and fire water racks into liquefied hydrocarbon storage tanks, the safety issues of liquefied hydrocarbon storage tanks in emergency situations have been solved, enabling rapid response and stable storage, and ensuring the safe operation of the storage tanks and the continuity of production.
Patent Information
- Application Number
- CN202520142556.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing liquefied hydrocarbon storage tank designs lack effective protection systems in the face of emergencies, resulting in insufficient safety and emergency response capabilities. In particular, they cannot respond quickly and ensure the stability of the storage tanks in the event of liquefied hydrocarbon leaks or overpressure.
A protective system for liquefied hydrocarbon storage tanks was designed, including components such as the cavity between the inner tank and the outer wall, circulating water coils, water mist nozzles, fire hydrants, and a spare tank. Through the linkage and connection of these components, a rapid response and safety guarantee are achieved in emergency situations, ensuring the stability and cooling effect of the storage tank.
It effectively prevents overpressure accidents, provides dual fire protection, enhances the cooling effect of the storage tank, and can quickly switch to the backup tank in an emergency, ensuring the continuity and safety of production.
Smart Images
Figure CN223635914U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to liquefied hydrocarbon storage tank technical field, specifically relates to a kind of protection system for liquefied hydrocarbon storage tank. BACKGROUND
[0002] Liquefied hydrocarbon, as important raw material or product in petroleum chemical industry, has the characteristics of flammable, explosive and easy to diffuse, which brings severe test to the fire safety situation of enterprise.
[0003] CN221958647U discloses a kind of liquefied hydrocarbon vacuum low-temperature storage equipment, equipment is realized low-temperature storage by vacuum cavity and refrigeration coil, utilize the linkage of floating block, lifting column and lifting plate and pressure sensor, accurately control inner tank liquid level, prevent liquefied hydrocarbon overflow, by the overall design of storage equipment, improve the accuracy and safety of storage, reduce waste, however, it is mainly designed for vacuum low-temperature, in order to ensure low temperature, vacuum cavity is provided with heat preservation block, compresses the space of vacuum cavity, but it is not designed for the leakage of liquefied hydrocarbon in emergency, and water inlet, water outlet and other components are not designed, in the face of emergency, poor emergency response capability.
[0004] In summary, the existing design mainly aims at liquefied hydrocarbon storage tank, but the protection system is not further designed during design, resulting in poor practicability of liquefied hydrocarbon storage tank, therefore, it is particularly important to reasonably design the protection system technology of liquefied hydrocarbon storage tank, ensure the stable use of liquefied hydrocarbon storage tank, and have good response capability in emergency. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the above-mentioned defects existing in prior art, provide protection system for liquefied hydrocarbon storage tank, effectively prevent the occurrence of overpressure accident by the design of each device and connection relationship, ensure the safe operation of storage tank, set up fire-fighting water rack and standby tank, provide double protection for storage tank, can respond quickly in emergency, the cavity design between inner tank and outer wall and the use of circulating water coil and water mist spray head further enhance the cooling effect of storage tank, and ensure the safety of storage tank in emergency.
[0006] The protection system for liquefied hydrocarbon storage tank, including liquefied hydrocarbon storage tank, the liquefied hydrocarbon storage tank is provided with inner tank, cavity is formed between inner tank and the outer wall of liquefied hydrocarbon storage tank, a layer of heat insulation layer is arranged on the outside of liquefied hydrocarbon storage tank, circulating water coil is fixed on the outer wall of liquefied hydrocarbon storage tank along horizontal direction, water mist spray head is arranged on the top of circulating water coil and penetrates into inner tank, inner tank is connected with the outer wall of liquefied hydrocarbon storage tank through the fixed block on left and right sides, and connection channel is arranged in the center of fixed block.
[0007] Preferably, the liquefied hydrocarbon storage tank is connected with a flare recovery device, the liquefied hydrocarbon storage tank is connected with a downstream device through a discharge pipeline, the discharge pipeline is connected with a standby tank, the liquefied hydrocarbon storage tank is provided with a pipeline connected with a circulating water device at the top, and the liquefied hydrocarbon storage tank is provided with a fire-fighting water rack outside.
[0008] Preferably, the liquefied hydrocarbon storage tank is provided with an inner tank, a cavity is formed between the inner tank and the outer wall of the liquefied hydrocarbon storage tank, a heat insulation layer is arranged outside the liquefied hydrocarbon storage tank, a circulating water coil is fixed to the outer wall of the liquefied hydrocarbon storage tank in the horizontal direction, the circulating water coil is provided with a water mist nozzle penetrating into the inner tank at the top, and the inner tank is connected with the outer wall of the liquefied hydrocarbon storage tank through fixing blocks on the left and right sides, and the fixing blocks are provided with a connecting channel in the center.
[0009] Preferably, the liquefied hydrocarbon storage tank is provided with a feed inlet, an alarm device and a top outlet at the top, the feed inlet is connected with a liquefied hydrocarbon conveying pipeline, the flare recovery device is connected with the top outlet of the liquefied hydrocarbon storage tank, and the top outlet is provided with pipelines connected with a downstream device and a standby tank.
[0010] Preferably, the fire-fighting water rack is arranged at four corners outside the liquefied hydrocarbon storage tank, the fire-fighting water rack has two specifications of high rack and low rack, fire-fighting water racks of the same specification are located on diagonal lines, and the fire-fighting water racks are all provided with spray guns.
[0011] Preferably, the fire-fighting water rack is provided with a pipeline connected with a circulating water device.
[0012] Preferably, the circulating water device and the fire-fighting water tank are both provided with pipelines connected with a standby tank, the outlet of the circulating water device is provided with a circulating water pump, and the outlet of the fire-fighting water tank is provided with a fire-fighting water pump.
[0013] Preferably, the liquefied hydrocarbon storage tank is provided with a fixing frame at the bottom, and the liquefied hydrocarbon storage tank is provided with a drain port pipeline at the bottom.
[0014] Preferably, the connection point of the top of the liquefied hydrocarbon storage tank and the circulating water device is an inlet of a circulating water coil fixed to the outer wall of the liquefied hydrocarbon storage tank, the inlet of the circulating water coil is provided with a pipeline connected with a fire-fighting water tank, and the outlet of the circulating water coil is connected with a circulating water inlet pipeline of a downstream device.
[0015] Preferably, the bottom of the standby tank is provided with a pipeline connected with a downstream device, and the bottom discharge outlet of the standby tank is provided with a pipeline connected with a feed inlet of a liquefied hydrocarbon storage tank.
[0016] Preferably, the liquefied hydrocarbon storage tank and the standby tank are both provided with the same internal structure.
[0017] Preferably, all pipelines of the feed inlet and the discharge outlet of the liquefied hydrocarbon storage tank penetrate into an inner tank of the liquefied hydrocarbon storage tank.
[0018] Specifically, the liquefied hydrocarbon storage tank protection system, during normal production work, the liquefied hydrocarbon transported from outside enters the inner tank of the liquefied hydrocarbon storage tank through the liquefied hydrocarbon delivery pipeline and the feed inlet, the liquefied hydrocarbon storage tank maintains a certain temperature under the action of the heat insulation layer and the circulating water, so as to ensure that the liquefied hydrocarbon is in a liquid state, in the liquefied hydrocarbon delivery process, a differential pressure liquid level sensor is arranged at the bottom of the alarm device to monitor the liquid level in the liquefied hydrocarbon storage tank in real time, and the liquid level is transmitted to the terminal through the alarm device, after the delivery of the liquefied hydrocarbon is completed, the liquefied hydrocarbon is delivered to the downstream device through the bottom discharge pipeline, a self-control three-way valve is arranged on the pipeline, the self-control three-way valve is also connected with a standby tank, in case of an emergency, the liquefied hydrocarbon can be quickly transferred to ensure safety, the standby tank has the same basic functions as the liquefied hydrocarbon storage tank, and also has heat insulation and cooling conditions, and the bottom of the standby tank is provided with a discharge pipeline, so that when the liquefied hydrocarbon storage tank cannot be used for a short time, the discharge pipeline can be used as a delivery device to continue to participate in production; in addition, during normal work, the circulating water coil of the liquefied hydrocarbon storage tank is connected with the circulating water device to realize low-temperature control of the device, and a three-way valve is also arranged on the pipeline connected with the circulating water device, and the three-way valve is connected with a fire water tank. When an emergency occurs, if a leakage point appears at the bottom of the inner tank, the circulating water coil is disconnected from the circulating water, the connection valve with the fire water tank is opened, the fire water pressure forces the water mist nozzle connected with the circulating water coil to open, high-pressure water is delivered into the inner tank of the liquefied hydrocarbon, so that the minimum liquid level of the liquefied hydrocarbon is higher than the leakage point, meanwhile, the bottom discharge pipeline valve is closed, and the liquefied hydrocarbon is not delivered to the downstream device any more, so as to ensure the safety of the device, and subsequent operations can be carried out, meanwhile, if the leakage point is too high, a large amount of fire water can be delivered to the inner tank, the liquefied hydrocarbon in the inner tank can overflow through the top discharge port to the standby tank for storage or enter the downstream device for use, after the liquefied hydrocarbon is transferred, the bottom drain port is opened to drain water; if the liquefied hydrocarbon storage tank is overpressured, no other reasonable measures can be taken, the overpressured liquefied hydrocarbon can be directly delivered to a flare recovery device through the top outlet, so as to ensure the safety of the tank area; when a leakage point appears at the top of the liquefied hydrocarbon storage tank, the fire water rack outside the liquefied hydrocarbon storage tank is automatically opened and connected with the fire water tank to spray a large amount of fire water to cut off the connection between the liquefied hydrocarbon storage tank and other devices, and the fire water rack can be connected with the circulating water device during normal work, when the external temperature is too high and the temperature in the tank decreases slowly, in order to prevent unexpected situations, the external circulating water can also be sprayed to quickly reduce the temperature.
[0019] Compared with the prior art, the beneficial effects of the utility model are: through the connection of the torch recovery device and the liquefied hydrocarbon storage tank, the occurrence of overpressure accidents is effectively prevented, and the safe operation of the storage tank is ensured; secondly, the setting of the water mist sprayer, the fire-fighting water stand and the connection with the circulating water device provide double fire-fighting protection for the storage tank, can rapidly respond in an emergency and reduce the fire risk. In addition, the cavity design between the inner tank and the outer wall and the use of the circulating water coil further enhance the cooling effect of the storage tank and ensure the stability of the liquefied hydrocarbon in the storage process; at the same time, the system also has high flexibility and reliability, and the setting of the standby tank enables the standby tank to be rapidly switched to in the case that the storage tank needs to be repaired or in an emergency, thereby ensuring the continuity of production. BRIEF DESCRIPTION OF DRAWINGS
[0020] Fig. 1 It is a structure schematic view of the protection system for the liquefied hydrocarbon storage tank in the utility model;
[0021] Fig. 2 It is a top view of the liquefied hydrocarbon storage tank in the utility model;
[0022] Fig. 3 It is a sectional view of the liquefied hydrocarbon storage tank in the utility model.
[0023] In the drawing: 1, liquefied hydrocarbon storage tank; 2, torch recovery device; 3, downstream device; 4, standby tank; 5, fire-fighting water tank; 6, fire-fighting water pump; 7, circulating water pump; 8, circulating water device; 9, liquefied hydrocarbon delivery pipeline; 10, low rack; 11, high rack; 12, spray gun; 13, fixing frame; 14, drain outlet pipeline; 15, discharge pipeline; 16, downstream device circulating water inlet pipeline; 101, feed inlet; 102, alarm device; 103, top outlet; 104, heat insulation layer; 105, circulating water coil; 106, water mist sprayer; 107, cavity; 108, connecting channel; 109, inner tank; 110, fixing block. DETAILED DESCRIPTION
[0024] The utility model will be further described below in combination with specific drawings.
[0025] As Figs. 1-3 Indicated, the protection system for the liquefied hydrocarbon storage tank, including liquefied hydrocarbon storage tank 1, torch recovery device 2, downstream device 3, standby tank 4, liquefied hydrocarbon storage tank 1 is connected with torch recovery device 2, and liquefied hydrocarbon storage tank 1 bottom is provided with discharge pipeline 15 and is connected with downstream device 3, and discharge pipeline 15 is connected with standby tank 4, and liquefied hydrocarbon storage tank 1 top is provided with the pipeline connected with circulating water device 8, and liquefied hydrocarbon storage tank 1 periphery is provided with fire-fighting water stand, and fire-fighting water stand is provided with the pipeline connected with fire-fighting water tank 5.
[0026] The liquefied hydrocarbon storage tank 1 is provided with an inner tank 109, and a cavity 107 is formed between the inner tank 109 and the outer wall of the liquefied hydrocarbon storage tank 1; a heat insulation layer 104 is arranged outside the liquefied hydrocarbon storage tank 1; a circulating water coil 105 is fixed to the outer wall of the liquefied hydrocarbon storage tank 1 along the horizontal direction; a water mist nozzle 106 is arranged on the top of the circulating water coil 105 and extends into the inner tank 109; the inner tank 109 is connected to the outer wall of the liquefied hydrocarbon storage tank 1 through fixing blocks 110 arranged on the left and right sides of the inner tank 109; and a connecting channel 108 is arranged in the center of each fixing block 110.
[0027] The liquefied hydrocarbon storage tank 1 is provided with a feed inlet 101, an alarm device 102 and a top outlet 103; the feed inlet 101 is connected to a liquefied hydrocarbon delivery pipeline 9; a flare recovery device 2 is connected to the top outlet 103 of the liquefied hydrocarbon storage tank 1; and the top outlet 103 is provided with pipelines connected to a downstream device 3 and a standby tank 4.
[0028] The fire-fighting water rack is arranged at four corners of the liquefied hydrocarbon storage tank 1; the fire-fighting water rack includes high racks 11 and low racks 10; fire-fighting water racks of the same specification are arranged on diagonal lines; and a spray gun 12 is arranged on each fire-fighting water rack; and the fire-fighting water rack is provided with a pipeline connected to a circulating water device 8.
[0029] The circulating water device 8 and the fire-fighting water tank 5 are both provided with pipelines connected to the standby tank 4; a circulating water pump 7 is arranged at the outlet of the circulating water device 8; and a fire-fighting water pump 6 is arranged at the outlet of the fire-fighting water tank 5.
[0030] The liquefied hydrocarbon storage tank 1 is provided with a fixing frame 13 at the bottom; and a drain pipe 14 is arranged at the bottom of the liquefied hydrocarbon storage tank 1.
[0031] The top of the liquefied hydrocarbon storage tank 1 is connected to the circulating water device 8; the connection point is the inlet of the circulating water coil 105 fixed to the outer wall of the liquefied hydrocarbon storage tank 1; the inlet of the circulating water coil 105 is provided with a pipeline connected to the fire-fighting water tank 5; and the outlet of the circulating water coil 105 is connected to a circulating water inlet pipeline 16 of a downstream device.
[0032] The bottom of the standby tank 4 is provided with a pipeline connected to the downstream device 3; and a pipeline connected to the feed inlet 101 of the liquefied hydrocarbon storage tank 1 is arranged at the bottom discharge outlet of the standby tank 4.
[0033] The liquefied hydrocarbon storage tank 1 and the standby tank 4 are both provided with the same internal structure.
[0034] The protection system for liquefied hydrocarbon storage tank, during normal production, the liquefied hydrocarbon from outside is transported into the inner tank 109 of the liquefied hydrocarbon storage tank 1 through the liquefied hydrocarbon transport pipeline 9 and the feed inlet 101, and the liquefied hydrocarbon storage tank 1 maintains a certain temperature under the action of the heat insulation layer 104 and the circulating water device 8 to ensure that the liquefied hydrocarbon is in liquid state. During the transport of the liquefied hydrocarbon, the differential pressure liquid level sensor at the bottom of the alarm device 102 monitors the liquid level in the liquefied hydrocarbon storage tank 1 in real time and transmits the liquid level to the terminal through the alarm device 102. After the transport of the liquefied hydrocarbon is completed, the liquefied hydrocarbon is transported to the downstream device 3 through the bottom discharge pipeline 15, and a self-control three-way valve is arranged on the pipeline, and the self-control three-way valve is also connected with the standby tank 4, so that the liquefied hydrocarbon can be quickly transferred in case of emergency to ensure safety. The standby tank 4 has the same functions as the liquefied hydrocarbon storage tank 1 and also has heat insulation and cooling conditions, and the bottom of the standby tank 4 is provided with a discharge port, so that when the liquefied hydrocarbon storage tank 1 cannot be used for a short time, the standby tank 4 can act as a transport device to continue to participate in production. In addition, during normal operation, the circulating water coil 105 of the liquefied hydrocarbon storage tank 1 is connected with the circulating water device 8 to realize low-temperature control of the device, and a three-way valve is also arranged on the pipeline connected with the circulating water device 8, and the three-way valve is connected with the fire water tank 5. When an emergency occurs, if a leakage point appears at the bottom of the inner tank 109, the circulating water coil 105 is immediately disconnected from the circulating water and the connecting valve of the fire water tank 5 is opened, and the fire water pressure forces the water mist sprayer 106 connected with the circulating water coil 105 to open, so that high-pressure water is transported into the liquefied hydrocarbon inner tank 109, to ensure that the minimum liquid level of the liquefied hydrocarbon is higher than the leakage point. At the same time, the valve of the bottom discharge pipeline 15 is closed, and the liquefied hydrocarbon is no longer transported to the downstream device 3, to ensure the safety of the device. When subsequent operations are performed, if the position of the leakage point is too high, a large amount of fire water can be transported to the inner tank 109, and the liquefied hydrocarbon in the tank can overflow through the top outlet 103 to the standby tank 4 for storage or to the downstream device 3 for use. After the liquefied hydrocarbon is transferred, the bottom drain port pipeline 14 is opened to drain water.
[0035] If the liquefied hydrocarbon storage tank 1 is over-pressured, no other reasonable measures can be taken, and the over-pressured liquefied hydrocarbon can be directly transported to the flare recovery device 2 through the top outlet 103 to ensure the safety of the tank area.
[0036] When a leakage point appears at the top of the liquefied hydrocarbon storage tank 1, the fire water frame (including the high frame 11 and the low frame 10) around the liquefied hydrocarbon storage tank 1 is automatically opened and connected with the fire water tank 5 to spray a large amount of fire water to cut off the connection between the liquefied hydrocarbon storage tank 1 and other devices, and the fire water frame can be connected with the circulating water device 8 during normal operation, so that the circulating water can be sprayed from outside to quickly reduce the temperature when the temperature of the tank is reduced slowly due to high external temperature to prevent unexpected situations.
Claims
1. A containment system for a liquefied hydrocarbon storage tank, characterized by, The application relates to a liquefied hydrocarbon storage tank (1), a flare recovery device (2), downstream devices (3) and a standby tank (4), wherein the liquefied hydrocarbon storage tank (1) is connected with the flare recovery device (2), the bottom of the liquefied hydrocarbon storage tank (1) is provided with a discharge pipeline (15) connected with the downstream devices (3), the discharge pipeline (15) is connected with the standby tank (4), the top of the liquefied hydrocarbon storage tank (1) is provided with a pipeline connected with a circulating water device (8), the periphery of the liquefied hydrocarbon storage tank (1) is provided with a fire-fighting water rack, and the fire-fighting water rack is provided with a pipeline connected with a fire-fighting water tank (5). The liquefied hydrocarbon storage tank (1) is internally provided with an inner tank (109), a cavity (107) is formed between the inner tank (109) and the outer wall of the liquefied hydrocarbon storage tank (1), a heat insulation layer (104) is arranged outside the liquefied hydrocarbon storage tank (1), circulating water coils (105) are fixed to the outer wall of the liquefied hydrocarbon storage tank (1) in the horizontal direction, water mist nozzles (106) are arranged on the top of the circulating water coils (105) and extend into the inner tank (109), the inner tank (109) is connected with the outer wall of the liquefied hydrocarbon storage tank (1) through fixing blocks (110) arranged on the left and right sides, and a connecting channel (108) is arranged in the center of the fixing blocks (110).
2. The protection system for liquefied hydrocarbon storage tanks according to claim 1, characterized in that, The top of the liquefied hydrocarbon storage tank (1) is provided with a feed inlet (101), an alarm device (102) and a top outlet (103), the feed inlet (101) is connected with a liquefied hydrocarbon conveying pipeline (9), the flare recovery device (2) is connected with the top outlet (103) of the liquefied hydrocarbon storage tank (1), and the top outlet (103) is provided with pipelines connected with the downstream devices (3) and the standby tank (4).
3. The protection system for liquefied hydrocarbon storage tanks according to claim 1, characterized in that, The fire-fighting water rack is arranged at four corners of the periphery of the liquefied hydrocarbon storage tank (1), the fire-fighting water rack has two specifications of high rack (11) and low rack (10), the fire-fighting water racks with the same specification are located on diagonal lines, and a spray gun (12) is arranged on the fire-fighting water rack.
4. The protection system for liquefied hydrocarbon storage tanks according to claim 1, characterized in that, The fire-fighting water rack is provided with a pipeline connected with the circulating water device (8).
5. The protection system for liquefied hydrocarbon storage tanks of claim 1, wherein, The circulating water device (8) and the fire-fighting water tank (5) are provided with pipelines connected with the standby tank (4), a circulating water pump (7) is arranged at the outlet of the circulating water device (8), and a fire-fighting water pump (6) is arranged at the outlet of the fire-fighting water tank (5).
6. The protection system for liquefied hydrocarbon storage tanks of claim 1, wherein, The bottom of the liquefied hydrocarbon storage tank (1) is provided with a fixing frame (13), and the bottom of the liquefied hydrocarbon storage tank (1) is provided with a drain port pipeline (14).
7. The protection system for liquefied hydrocarbon storage tanks of claim 1, wherein, The top of the liquefied hydrocarbon storage tank (1) is connected with the circulating water device (8), the connecting point is the inlet of the circulating water coil (105) fixed to the outer wall of the liquefied hydrocarbon storage tank (1), the inlet of the circulating water coil (105) is provided with a pipeline connected with the fire-fighting water tank (5), and the outlet of the circulating water coil (105) is connected with a circulating water inlet pipeline (16) of the downstream device.
8. The protection system for liquefied hydrocarbon storage tanks of claim 1, wherein, The bottom of the standby tank (4) is provided with a pipeline connected with the downstream devices (3), and the bottom discharge port of the standby tank (4) is provided with a pipeline connected with the feed inlet (101) of the liquefied hydrocarbon storage tank (1).
9. The protection system for liquefied hydrocarbon storage tanks of claim 1, wherein, The liquefied hydrocarbon storage tank (1) and the standby tank (4) are internally provided with the same structure.