Anti-corrosion cooling flow guide device for liquid ammonia spherical tank

Abstract

The utility model belongs to the technical field of liquid ammonia spherical tank protection, and particularly relates to an anti-corrosion cooling flow guide device for a liquid ammonia spherical tank. The liquid ammonia spherical tank anti-corrosion cooling flow guiding device comprises a spherical tank body, a leaching device and a flow guiding device, the leaching device and the flow guiding device are both located outside the spherical tank body, the spherical tank body is fixed through a supporting frame, the leaching device is connected with a conveying pump, the conveying pump is provided with a pipeline connected with the bottom of a collecting tank, and a control valve D is arranged on the pipeline. The collecting tank is positioned at the bottom of the filter tank; water-permeable bricks are paved on the upper surface of the filter tank; the flow guiding device is composed of a first-stage water retaining ring and a second-stage water retaining ring. According to the anti-corrosion cooling flow guide device for the liquid ammonia spherical tank, the detachable water retaining ring is arranged on the liquid ammonia spherical tank, corrosion of water to components at the bottom of the tank body is reduced, flowing water forms a water curtain, ammonia diffusion during bottom leakage is further prevented, meanwhile, rainwater can be collected in rainy seasons, water resources are utilized, and the resource waste phenomenon is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of liquid ammonia spherical tank protection technology, specifically relating to a liquid ammonia spherical tank anti-corrosion cooling and flow guiding device. Background Technology

[0002] As a critical facility for storing highly hazardous chemicals, the safety technology of liquid ammonia spherical tanks focuses on fire prevention, cooling, and leakage control. Currently, external spray systems combined with heat-insulating cooling paint are commonly used to cool the tank. The spray water curtain reduces surface temperature and dilutes leaked ammonia through evaporation and heat absorption. The tank surface is coated with a high-reflectivity cooling paint to reduce temperature rise caused by solar radiation and avoid traditional insulation materials hindering the spray effect. Furthermore, the tank layout must strictly adhere to fire separation standards and fire dikes must be installed to prevent the spread of leaks. The tanks are equipped with multi-parameter monitoring instruments for pressure, liquid level, and temperature, as well as an ammonia concentration-linked alarm system. However, existing liquid ammonia spherical tanks do not further recycle spray water or rainwater, resulting in significant water waste. Simultaneously, spray water or rainwater, due to gravity and inertia, easily flows into bottom valves, flanges, and other connections on the tank surface, causing further damage to the tank.

[0003] CN211215073U discloses a high-efficiency and energy-saving fire-fighting and cooling spray device for spherical tanks. This device has an installation box at the bottom of the spherical tank to collect the water generated by the spraying, and a water collection chamber and a sedimentation chamber inside the installation box. A protective box is installed at the top to transport the spraying water. Multiple spray pipes are arranged sequentially from top to bottom of the spherical tank for cooling. Through reasonable design of the above components, the spraying water is recycled, effectively reducing water waste. However, this device only focuses on the recycling of spraying water and does not consider that the spraying water may carry acidic substances (such as CO2, SO2) from the air or residual ammonia on the tank surface during its flow, forming a weakly alkaline or corrosive water film, accelerating the corrosion of metal components such as bottom flanges and bolts. Simultaneously, when the spraying water flows naturally down the surface of the spherical tank, the curvature of the tank easily forms local water accumulation areas at the bottom, leading to long-term aging of valve seals. Therefore, it is necessary to propose a corrosion-resistant cooling and diversion device for liquid ammonia spherical tanks to solve the corrosion problem of bottom components in liquid ammonia spherical tanks. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned defects in the existing technology and provide a corrosion-resistant, cooling and flow-guiding device for liquid ammonia spherical tanks. By setting a detachable water-blocking ring on the liquid ammonia spherical tank, the corrosion of the bottom components of the tank by water is reduced, and the flowing water forms a water curtain, which can further prevent the diffusion of ammonia gas when leaking from the bottom. At the same time, rainwater can be collected during the rainy season by using the collection tank and the filter tank, realizing the utilization of water resources and reducing resource waste.

[0005] The anti-corrosion and cooling diversion device for liquid ammonia spherical tanks of this utility model includes a spherical tank body, a rinsing device, and a diversion device. Both the rinsing device and the diversion device are located outside the spherical tank body. The rinsing device includes a primary rinsing frame and a secondary rinsing frame. The primary rinsing frame is arranged in three layers from bottom to top along the spherical tank body, starting from the middle. The secondary rinsing frame is a single layer located at the bottom of the spherical tank. Both the primary and secondary rinsing frames are fixed to the spherical tank body via connecting frames. The spherical tank body is fixed by a support frame. The rinsing device is connected to a delivery pump. The delivery pump has a pipeline connected to the bottom of a collection tank, and a control valve D is installed on the pipeline. The collection tank is located at the bottom of a filter tank, and the upper surface of the filter tank is covered with permeable bricks. The diversion device consists of a primary water-blocking ring and a secondary water-blocking ring, both located on the spherical tank body, forming a ring-shaped diversion space.

[0006] Preferably, both the primary and secondary rinsing racks are equipped with water spray guns, the spray angle of which is adjustable and they are evenly distributed in a ring on the primary and secondary rinsing racks.

[0007] Preferably, the secondary rinsing rack is located between the primary and secondary water-blocking rings. The primary and secondary rinsing racks are connected to the delivery pump through different pipelines. A control valve A is installed on the pipeline connecting the primary rinsing rack to the delivery pump, and a control valve B is installed on the pipeline connecting the secondary rinsing rack to the delivery pump.

[0008] Preferably, the primary and secondary water-blocking rings have the same structure, both consisting of three silicone water-blocking strips. Each silicone water-blocking strip consists of a handle guide structure and a bottom base, with the bottom base bonded to the main body of the spherical tank via an integrated adhesive backing. Furthermore, the silicone water-blocking strips are bendable, making them easy to attach to the surface of the spherical tank after bending. They can also be adaptively adjusted within a certain range according to the position of the water spraying device, and can be increased or decreased if the length is unsuitable.

[0009] Preferably, the connecting part of the silicone water-blocking strip is equipped with a magnetic structure for magnetic connection of two silicone water-blocking strips; furthermore, the magnetic structure is detachable, and the silicone water-blocking strip can be re-embedded in the magnetic structure after being divided due to length.

[0010] Preferably, a drainage pipe is provided on one side of the collection tank, and a control valve C is provided on the drainage pipe. The inlet of the delivery pump is provided with a pipe connected to the fire water. Furthermore, the pipe connecting the inlet of the delivery pump to the fire water is controlled by the control valve D.

[0011] Preferably, the bottom of the filter tank is provided with a square filter mechanism, which is provided with a surface primary filter layer, an internal activated carbon layer and a bottom filter plate from top to bottom.

[0012] Preferably, the primary filter screen in the surface primary filter layer is fixed as a cuboid frame structure by a bracket and covers the outside of the activated carbon layer; the filter plate includes a support grid and a composite filter screen, the composite filter screen is fixed to the surface of the support grid, the filter plate is detachably connected to the collection tank, and is located in the central area of ​​the bottom of the collection tank.

[0013] Specifically, the process of using the liquid ammonia spherical tank corrosion prevention, cooling, and diversion device is as follows: When a leak is detected in the liquid ammonia spherical tank or when cooling is required, the transfer pump switch is turned on, control valves A and B are opened, and control valve C is closed. Water in the collection tank is transferred to the rinsing device, and water is sprayed through the spray guns on the primary and secondary rinsing frames to cool the main body of the spherical tank. The rinsing water flows down along the main body of the spherical tank. The rinsing water sprayed from the primary rinsing frame is guided by the primary water baffle ring, forming a water curtain. Part of the rinsing water sprayed from the secondary rinsing frame falls naturally, and the other part is guided by the secondary water baffle ring to prevent ammonia-containing wastewater from entering the bottom valve and causing corrosion. The ammonia-containing wastewater enters the bottom filter tank through the permeable bricks, and after multi-stage filtration through the primary filter, activated carbon, and composite filter, it enters the bottom collection tank for recycling. When the amount of rinsing water in the collection tank is insufficient, control valve D is adjusted to connect the pipeline connecting the transfer pump and the fire water supply to ensure a stable water volume. When the leak point is located at the upper end of the spherical tank, the adjustable control valve A opens and the control valve B closes, reducing the waste of rinsing water. The water curtain formed by the first-stage water barrier can effectively isolate the leaked ammonia gas.

[0014] When the rainy season occurs, rainwater dripping onto the main body of the spherical tank can pass through the permeable bricks into the filter tank under the action of the first-stage water-blocking ring, and then enter the collection tank for collection. When it is used later, it can be directly transported by the transfer pump. When the amount of rainwater is large, the water storage in the collection tank is limited. At this time, the control valve C is opened, and the water is sent to the sewage network through the drainage pipe at the bottom of the collection tank.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model combines a detachable water-blocking ring with a showering device to form a guiding water curtain, effectively blocking the spread of liquid ammonia leakage and reducing corrosion of tank bottom components. At the same time, the spray range can be adjusted to accurately respond to leakage scenarios, taking into account both safety and water conservation needs. Secondly, the rainwater guiding structure combined with a multi-stage filter tank realizes the automatic collection, purification and recycling of rainwater, and controls the discharge of stored water or the replenishment of fire-fighting water through valves, significantly improving resource utilization and environmental benefits. Finally, the water-blocking ring can be bent and adjusted and magnetically spliced, adapting to the curvature of the spherical tank and is easy to disassemble and assemble, greatly reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the anti-corrosion, cooling and diversion device for liquid ammonia spherical tank in this utility model;

[0017] Figure 2This is an enlarged view of the bonding point between the water-retaining strip and the main body of the spherical tank in this utility model;

[0018] Figure 3 This is a schematic diagram of the surface primary filter layer in the filtration mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the filter plate in the filtration mechanism of this utility model.

[0020] In the diagram: 1. Main body of the spherical tank; 2. Washing device; 201. Primary washing rack; 202. Secondary washing rack; 203. Water spray gun; 204. Connecting frame; 3. Primary water baffle ring; 301. Base; 302. Flow guiding structure; 303. Magnetic suction structure; 304. Adhesive backing; 4. Secondary water baffle ring; 5. Support frame; 6. Control valve A; 7. Control valve B; 8. Transfer pump; 9. Control valve C; 10. Filter tank; 11. Collection tank; 12. Permeable brick; 13. Control valve D; 14. Activated carbon layer; 15. Drainage pipe; 16. Surface primary filter layer; 1601. Primary filter screen; 1602. Support; 17. Filter plate; 1701. Support grid; 1702. Composite filter screen. Detailed Implementation

[0021] The specific implementation scheme of this utility model will be further described below with reference to the accompanying drawings.

[0022] like Figures 1-4 As shown, the anti-corrosion and cooling diversion device for the liquid ammonia spherical tank includes a spherical tank body 1, a rinsing device 2, and a diversion device. The spherical tank body 1 is fixed by a support frame 5. The rinsing device 2 is installed on the outside of the spherical tank body 1. The rinsing device 2 is connected to a transfer pump 8. The transfer pump 8 is provided with a pipeline connected to the bottom of the collection tank 11. A control valve D13 is installed on the pipeline. The collection tank 11 is located at the bottom of the filter tank 10. The upper surface of the filter tank 10 is covered with permeable bricks 12. The diversion device consists of a primary water-blocking ring 3 and a secondary water-blocking ring 4. Both the primary water-blocking ring 3 and the secondary water-blocking ring 4 are located on the spherical tank body 1, forming an annular diversion space.

[0023] The rinsing device 2 includes a primary rinsing rack 201 and a secondary rinsing rack 202. The primary rinsing rack 201 is arranged in three layers from bottom to top along the main body of the spherical tank 1, starting from the middle position of the tank body 1. The secondary rinsing rack 202 is arranged in one layer at the bottom of the spherical tank.

[0024] Both the primary rinsing rack 201 and the secondary rinsing rack 202 are fixed to the main body 1 of the spherical tank via a connecting frame 204. Both the primary rinsing rack 201 and the secondary rinsing rack 202 are equipped with water spray guns 203. The spray angle of the water spray guns 203 is adjustable and they are evenly distributed in a ring on the primary rinsing rack 201 and the secondary rinsing rack 202.

[0025] The secondary rinsing rack 202 is located between the primary water baffle ring 3 and the secondary water baffle ring 4. The primary rinsing rack 201 and the secondary rinsing rack 202 are respectively connected to the delivery pump 8 through different pipelines. A control valve A6 is installed on the pipeline connecting the primary rinsing rack 201 to the delivery pump 8, and a control valve B7 is installed on the pipeline connecting the secondary rinsing rack 202 to the delivery pump 8.

[0026] The primary water-blocking ring 3 and the secondary water-blocking ring 4 have the same structure, both consisting of three silicone water-blocking strips. Each silicone water-blocking strip consists of a handle guide structure 302 and a bottom base 301. The bottom base 301 is bonded to the main body 1 of the spherical tank via an integrated adhesive backing 304.

[0027] The connecting part of the silicone water-blocking strip is equipped with a magnetic structure 303 for magnetic connection of two silicone water-blocking strips.

[0028] A drainage pipe 15 is provided on one side of the collection tank 11. A control valve C9 is provided on the drainage pipe 15. A pipe connected to the fire water is provided at the inlet of the delivery pump 8. A control valve D13 is provided on the pipe.

[0029] The bottom of the filter tank 10 is provided with a square filter mechanism, which consists of a surface primary filter layer 16, an internal activated carbon layer 14, and a bottom filter plate 17 arranged sequentially from top to bottom.

[0030] The primary filter 1601 in the surface primary filter layer 16 is fixed as a cuboid frame structure by the bracket 1602 and covers the outside of the activated carbon layer 14; the filter plate 17 includes a support grid 1701 and a composite filter 1702. The composite filter 1702 is fixed to the surface of the support grid 1701. The filter plate 17 is detachably connected to the collection tank 11 and is located in the central area at the bottom of the collection tank 11.

[0031] During use, turn on the transfer pump 8 switch, open control valves A6 and B7, and close control valve C9 to transport the water in the collection tank 11 to the rinsing device 2. Water is sprayed through the water spray guns 203 on the primary rinsing frame 201 and the secondary rinsing frame 202 to cool the spherical tank body 1. The rinsing water flows down along the spherical tank body 1. The rinsing water sprayed from the primary rinsing frame 201 is guided by the primary water baffle ring 3, forming a water curtain. The rinsing water sprayed from the secondary rinsing frame 202... Part of the water flows naturally, while the other part is guided by the secondary water-blocking ring 4 to prevent ammonia-containing wastewater from entering the bottom valve and causing corrosion. The ammonia-containing wastewater enters the bottom filter tank 10 through the permeable brick 12, and undergoes multi-stage filtration through the primary filter screen 1601, activated carbon layer 14, and composite filter screen 1702 before entering the bottom collection tank 11 for recycling. When the amount of washing water in the collection tank 11 is insufficient, the control valve D13 is adjusted to connect the pipeline between the transfer pump 8 and the fire water supply to ensure a stable water volume. When the leak point is located at the upper end of the spherical tank body 1, the adjustable control valve A6 can be opened and the control valve B7 closed to reduce the waste of washing water. The guiding structure 302 formed by the primary water-blocking ring 3 can effectively isolate the leaked ammonia gas.

[0032] When the rainy season occurs, rainwater dripping onto the main body 1 of the spherical tank can be guided by the flow structure 302 of the secondary water-blocking ring 4, pass through the permeable brick 12 and enter the filter tank 10. After filtration, it enters the collection tank 11 for collection. When it is used later, it can be directly transported by the transfer pump 8. When the amount of rainwater is large, the water storage in the collection tank 11 is limited. At this time, the control valve C9 is opened, and the water is sent to the sewage network through the drainage pipe 15 at the bottom of the collection tank 11.

Claims

1. A kind of liquid ammonia spherical tank anticorrosion cooling flow guide device, it is characterized in that, The utility model relates to a ball tank, which comprises a ball tank body (1), a rinsing device (2) and a flow guide device, wherein the ball tank body (1) is fixed by a support frame (5), the ball tank body (1) is externally provided with the rinsing device (2), the rinsing device (2) is connected with a delivery pump (8), the delivery pump (8) is provided with a pipeline connected with the bottom of a collecting tank (11), the pipeline is provided with a control valve D (13), the collecting tank (11) is located at the bottom of a filtering tank (10), and the upper surface of the filtering tank (10) is paved with water-permeable bricks (12). The flow guide device is composed of a first water retaining ring (3) and a second water retaining ring (4), and the first water retaining ring (3) and the second water retaining ring (4) are both located on the ball tank body (1) to form a ring-shaped flow guide space.

2. The ammonia tank anti-corrosion cooling flow guide device according to claim 1, characterized in that, The rinsing device (2) comprises a first rinsing frame (201) and a second rinsing frame (202), the first rinsing frame (201) is sequentially arranged in three layers from the middle of the ball tank body (1) to the top along the ball tank body (1), and the second rinsing frame (202) is arranged on the lower part of the ball tank.

3. The ammonia tank corrosion prevention cooling flow guide device according to claim 2, characterized in that, The first rinsing frame (201) and the second rinsing frame (202) are both fixed on the ball tank body (1) through a connecting frame (204), the first rinsing frame (201) and the second rinsing frame (202) are both provided with water spray guns (203), the water spray angle of the water spray guns (203) is adjustable, and the water spray guns (203) are evenly distributed in a ring shape on the first rinsing frame (201) and the second rinsing frame (202).

4. The ammonia tank corrosion prevention cooling flow guide device according to claim 2, characterized in that, The second rinsing frame (202) is located between the first water retaining ring (3) and the second water retaining ring (4), the first rinsing frame (201) and the second rinsing frame (202) are connected with the delivery pump (8) through different pipelines, the pipeline connected with the first rinsing frame (201) and the delivery pump (8) is provided with a control valve A (6), and the pipeline connected with the second rinsing frame (202) and the delivery pump (8) is provided with a control valve B (7).

5. The ammonia tank corrosion prevention cooling flow guide device according to claim 1, characterized in that, The first water retaining ring (3) and the second water retaining ring (4) are the same in structure and are both composed of three sections of silica gel water retaining strips, the silica gel water retaining strip is composed of a handle flow guide structure (302) and a bottom base (301), and the bottom base (301) is bonded with the ball tank body (1) through an integral back adhesive (304).

6. The ammonia tank corrosion prevention cooling flow guide device according to claim 5, characterized in that, A magnetic attraction structure (303) is embedded at the connecting position of the silica gel water retaining strip, which is used for magnetic attraction connection of two sections of silica gel water retaining strips.

7. The ammonia tank corrosion prevention cooling flow guide device according to claim 1, characterized in that, A drainage pipeline (15) is arranged on one side of the collecting tank (11), the drainage pipeline (15) is provided with a control valve C (9), and the inlet of the delivery pump (8) is provided with a pipeline connected with a fire-fighting water.

8. The ammonia tank corrosion prevention cooling flow guide device according to claim 1, characterized in that, The bottom of the filtering tank (10) is provided with a square filtering mechanism, and the filtering mechanism is sequentially provided with a surface primary filtering layer (16), an internal activated carbon layer (14) and a bottom filter plate (17) from top to bottom.

9. The ammonia tank corrosion prevention cooling flow guide device according to claim 8, characterized in that, The primary filter screen (1601) in the surface primary filter layer (16) is fixed as a cuboid frame structure by a support (1602) and is wrapped outside the activated carbon layer (14); the filter plate (17) comprises a support grid (1701) and a composite filter screen (1702), the composite filter screen (1702) is fixed on the surface of the support grid (1701), and the filter plate (17) is detachably connected with the collecting groove (11) and is located at the center area of the bottom of the collecting groove (11).

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