Safe oil discharge storage device

Abstract

The utility model relates to the technical field of modified asphalt production, in particular to a safe oil discharge storage device. The safe oil discharging and storing device comprises an oil discharging pool, the oil discharging pool is connected with a filter through a discharging variable frequency pump, the filter is connected with an oil storage tank through a reciprocating variable frequency pump, a heat conduction oil coil pipe is arranged in the oil discharging pool, a filter heat preservation sleeve is arranged on the outer side of the filter, and the heat conduction oil coil pipe is connected with the filter heat preservation sleeve through a heating pipeline. A tuning fork type liquid level monitor is arranged on the inner side of the vertical wall of the oil discharging pool. According to the device, the tuning fork type liquid level monitor and the liquid level meter are arranged in the oil discharge pool, so that the purposes of improving the liquid level monitoring reliability, avoiding oil spilling or insufficient oil discharge and guaranteeing the oil discharge safety and the production continuity are achieved.

Description

Technical Field

[0001] This utility model relates to the field of modified asphalt production technology, specifically to a safe oil unloading and storage device. Background Technology

[0002] Modified asphalt is an asphalt binder made by adding admixtures (modifiers) such as rubber, resin, polymer, finely ground rubber powder, or other fillers to ordinary asphalt, or by taking measures such as slight oxidation processing of the asphalt, so as to improve the performance of the asphalt or asphalt mixture. Modified asphalt has the characteristics of good high-temperature stability, strong low-temperature crack resistance, excellent fatigue resistance, and high resistance to water damage, and is widely used in engineering fields such as high-grade highways, airport runways, and bridge deck paving.

[0003] The stable operation of the unloading and storage unit is crucial in the production of modified asphalt. However, existing unloading and storage units have several problems. First, the unloading pool level monitoring device is simplistic, relying on only one type of equipment. If this device malfunctions, it cannot obtain timely and accurate information about the unloading pool level, potentially leading to oil spills or insufficient unloading, affecting the continuity and safety of production. Second, the discharge pump is connected to the unloading pool via only one pipeline. Due to the high viscosity of asphalt, the pipeline is highly susceptible to blockage during unloading due to external factors, such as temperature drops causing asphalt solidification or the presence of impurities in the pipeline. Once the pipeline is blocked, the unloading operation will be forced to stop, severely impacting production progress. Furthermore, the quality of externally sourced asphalt varies greatly, with some containing significant impurities. Existing units typically only use simple mesh filters for filtration. Over time, impurities easily accumulate on the filter, causing blockage. This not only affects normal unloading but also allows impurities to enter subsequent production stages, severely impacting the quality of the modified asphalt. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a safe oil unloading and storage device. By setting a tuning fork level monitor and a level gauge in the oil unloading pool, the reliability of level monitoring is improved, oil spills or insufficient unloading are avoided, and the safety of unloading and production continuity are ensured.

[0005] This utility model is achieved using the following technical solution:

[0006] The aforementioned safe oil unloading and storage device includes an oil unloading tank, which is connected to a filter via a discharge variable frequency pump. The filter is connected to an oil storage tank via a reciprocating variable frequency pump. The oil unloading tank is equipped with a heat transfer oil coil inside, and a filter insulation sleeve is provided on the outside of the filter. The heat transfer oil coil is connected to the filter insulation sleeve via a heating pipe. A tuning fork-type liquid level monitor is provided on the inner side of the vertical wall of the oil unloading tank.

[0007] The pool walls are equipped with tuning fork level monitors and level gauges, enabling dual level monitoring to improve reliability and prevent oil spills or insufficient unloading. The unloading pool also features an unloading port and a safety valve. The unloading port is used for asphalt input, and the safety valve automatically releases pressure when the pressure inside the pool is too high, ensuring the pool's safety. The emergency discharge port is located 2 / 3 to 4 / 5 of the way from the bottom of the unloading pool and has a heat-conducting oil jacket on its outer side. In emergencies, the heat-conducting oil jacket can be used to heat the asphalt, allowing it to flow smoothly through the emergency discharge port and preventing unloading failure due to asphalt solidification.

[0008] The unloading pool is equipped with an oil unloading port and a safety valve, and a level gauge is installed on the vertical wall of the unloading pool.

[0009] The unloading tank is equipped with an emergency discharge port on its vertical wall. The bottom of the unloading tank is connected to the discharge variable frequency pump through an unloading tank pipeline, and the emergency discharge port is connected to the unloading tank pipeline through a connecting pipeline.

[0010] The emergency discharge port is located at 2 / 3-4 / 5 of the distance from the bottom of the oil unloading pool, and an emergency discharge port heat-conducting oil jacket is provided on the outside of the emergency discharge port.

[0011] The filter has a filter plate inside and an impurity outlet on the vertical wall of the filter, which is located above the filter plate.

[0012] The discharge variable frequency pump is provided with an inlet pipe between itself and the filter. The connection between the inlet pipe and the filter is located above the filter plate, while the connection between the reciprocating variable frequency pump and the filter is located below the filter plate.

[0013] The filter is equipped with an external insulation jacket, which is connected to the heat transfer oil coil via a heating pipe. This allows for heating and insulation of the filter, preventing asphalt from solidifying inside and affecting filtration efficiency. Furthermore, the filter can be backwashed via a reciprocating variable frequency pump and inlet / outlet pipes, extending its service life and ensuring continuous and stable filtration operation.

[0014] The reciprocating variable frequency pump is connected to the oil storage tank via an inlet pipe, and an outlet pipe is connected to the inlet pipe. The oil storage tank is equipped with an agitator.

[0015] The working principle of this utility model is as follows:

[0016] Preparation for unloading and feeding: Before unloading, turn on the heat transfer oil coil in the unloading tank and set the heat transfer oil temperature to 160-170℃ to preheat the unloading tank. Through the circulation of the heat transfer oil, maintain a stable temperature of 130-140℃ in the unloading tank to ensure good fluidity of the subsequently entering asphalt. Check that the unloading port, discharge variable frequency pump, reciprocating variable frequency pump, filter, level gauge, and tuning fork level monitor are operating normally, and ensure that all valves are closed. After confirming that the equipment is normal, connect the external asphalt delivery pipeline to the unloading port and slowly open the unloading valve to allow the asphalt to flow into the unloading tank. During the unloading process, closely monitor the readings of the level gauge and tuning fork level monitor, and control the unloading speed to ensure that the rise rate of the liquid level in the unloading tank does not exceed 5cm / min to prevent oil spills caused by excessively high liquid levels.

[0017] Filtration Process: When the asphalt level in the unloading tank reaches a certain height (approximately 1 / 3 of the tank bottom), the discharge variable frequency pump is started to transport the asphalt from the unloading tank to the filter through the unloading tank outlet pipe and the filter inlet pipe. The discharge variable frequency pump flow rate is set to 20-25 cubic meters per hour, and the pressure is controlled at 0.3-0.4 MPa to ensure a stable asphalt delivery to the filter. The filter plates inside the filter filter remove impurities. To ensure filtration effectiveness, the pressure inside the filter is maintained at 0.2-0.3 MPa. During the filtration process, the pressure difference between the filter inlet and outlet is continuously monitored. When the pressure difference reaches 0.1 MPa, it indicates that the filter plates may be clogged, requiring backwashing. When backwashing is deemed necessary, the discharge variable frequency pump is stopped, and the reciprocating variable frequency pump is started. The reciprocating variable frequency pump transports the flushing asphalt in reverse through the inlet / outlet pipe and the oil storage tank inlet pipe to the filter to flush the filter plates. The flow rate of the reciprocating variable frequency pump is set to 30-35 cubic meters per hour, the pressure is controlled at 0.4-0.5 MPa, and the backwashing time is 15-20 minutes. During the backwashing process, impurities are discharged through the impurity outlet, which can be cleaned periodically to ensure its unobstructed flow.

[0018] Storage and Mixing: Filtered asphalt is pumped into the storage tank via a reciprocating variable frequency pump. The storage temperature in the tank is maintained at 120-130℃ through continuous heating via a heat transfer oil coil. After the asphalt enters the storage tank, the agitator is activated at a speed of 30-40 rpm to ensure uniform mixing, prevent sedimentation and stratification, and guarantee the stability of the asphalt quality.

[0019] Emergency Handling: If the unloading tank pipeline becomes blocked, immediately stop the discharge variable frequency pump and the reciprocating variable frequency pump. Open the emergency discharge port valve and use the connecting pipe to discharge the asphalt from the unloading tank. Simultaneously, start the emergency discharge port heat transfer oil jacket and set the heat transfer oil temperature to 160-170℃ to heat the asphalt near the emergency discharge port, ensuring smooth discharge. When the unloading tank level reaches the warning height (approximately 20cm from the top of the tank), the tuning fork level monitor and level gauge will sound an alarm. At this time, close the unloading port valve, stop the unloading operation, and simultaneously open the emergency discharge port valve to perform emergency unloading through the connecting pipe until the level drops to the normal range. Compared with the prior art, the beneficial effects of this utility model are:

[0020] (1) By installing tuning fork level monitors and level gauges in the unloading pool, the reliability of level monitoring was improved, oil spills or insufficient unloading were avoided, and the safety of unloading and production continuity were ensured. Through the coordination of the discharge variable frequency pump, the reciprocating variable frequency pump and the inlet and outlet pipelines, the filter was backwashed, ensuring smooth unloading and reducing production interruptions.

[0021] (2) By using the filter plate inside the filter and the impurity outlet above, combined with the backwashing function, the goal of efficiently filtering asphalt impurities and ensuring the quality of modified asphalt products is achieved. By setting up an emergency discharge port and connecting pipeline, as well as a heat-conducting oil jacket for the emergency discharge port, the goal of enhancing emergency oil unloading capacity and reducing safety risks is achieved. Through the heating and insulation system connecting the heat-conducting oil coil of the oil unloading pool to the filter insulation jacket, the goal of optimizing the heating and insulation of the device, improving operating efficiency, and reducing energy consumption is achieved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the safe oil unloading and storage device of this utility model;

[0023] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0024] In the diagram: 1. Oil unloading tank; 2. Filter; 3. Oil storage tank; 4. Oil unloading port; 5. Safety valve; 6. Heat transfer oil coil; 7. Tuning fork level monitor; 8. Emergency discharge port; 9. Level gauge; 10. Discharge frequency converter pump; 11. Reciprocating frequency converter pump; 12. Oil unloading tank outlet pipe; 13. Connecting pipe; 14. Filter inlet pipe; 15. Filter plate; 16. Filter insulation jacket; 17. Impurity outlet; 18. Oil storage tank inlet pipe; 19. Agitator; 20. Heating pipe; 21. Inlet and outlet pipes; 22. Emergency discharge port heat transfer oil jacket. Detailed Implementation

[0025] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1 As shown, the safe oil unloading and storage device includes an oil unloading tank 1. The oil unloading tank 1 is connected to a filter 2 via a discharge variable frequency pump 10. The filter 2 is connected to an oil storage tank 3 via a reciprocating variable frequency pump 11. A heat transfer oil coil 6 is installed inside the oil unloading tank 1. A filter insulation sleeve 16 is installed outside the filter 2. The heat transfer oil coil 6 is connected to the filter insulation sleeve 16 via a heating pipe 20. A tuning fork type liquid level monitor 7 is installed on the inner side of the vertical wall of the oil unloading tank 1. Figure 2 As shown, the unloading tank 1 is equipped with an oil unloading port 4 and a safety valve 5, and a level gauge 9 is installed on the vertical wall of the unloading tank 1. An emergency discharge port 8 is located on the vertical wall of the unloading tank 1. The bottom of the unloading tank 1 is connected to the discharge variable frequency pump 10 via an oil unloading tank outlet pipe 12, and the emergency discharge port 8 is connected to the oil unloading tank outlet pipe 12 via a connecting pipe 13. The emergency discharge port 8 is located at 2 / 3-4 / 5 of the distance from the bottom surface of the unloading tank 1, and an emergency discharge port heat-conducting oil jacket 22 is installed on the outside of the emergency discharge port 8. The filter 2 has a filter plate 15 inside, and an impurity discharge port 17 is located on the vertical wall of the filter 2, above the filter plate 15. An inlet pipe 14 is provided between the discharge variable frequency pump 10 and the filter 2. The connection between the inlet pipe 14 and the filter 2 is located above the filter plate 15, and the connection between the reciprocating variable frequency pump 11 and the filter 2 is located below the filter plate 15. The filter plate 15 inside the filter can effectively intercept impurities in the asphalt and improve the purity of the asphalt. The filter wall has an impurity outlet 17 located above the filter plate to facilitate the discharge of impurities intercepted during the filtration process. An insulation sleeve 16 is installed on the outside of the filter and connected to the heat transfer oil coil 6 via a heating pipe 20. This allows for heating and insulation of the filter, preventing asphalt from solidifying inside and affecting the filtration effect. Furthermore, the filter can be backwashed via a reciprocating variable frequency pump 11 and inlet / outlet pipes 21, extending its service life and ensuring continuous and stable filtration operation. An inlet pipe 18 connects the reciprocating variable frequency pump 11 to the oil storage tank 3, and the inlet / outlet pipes 21 are connected to the inlet pipe 18. An agitator 19 is installed inside the oil storage tank 3.

[0028] The above-mentioned safe oil unloading and storage device includes the following steps during operation:

[0029] (1) Before unloading the oil, set the temperature of the heat transfer oil coil 6 in the unloading tank 1 to 160-170℃ and preheat it to 130-140℃. After checking that the equipment is normal and the valves are closed, connect the external pipeline to unload the oil. During unloading, pay attention to the level gauge 9 and the tuning fork level monitor 7, and control the rise rate of the liquid level to not exceed 5cm / min. (2) When the liquid level in the unloading tank reaches 1 / 3 of the bottom of the tank, start the discharge variable frequency pump 10 with a flow rate of 20-25 cubic meters / hour and a pressure of 0.3-0.4MPa to send the asphalt to the filter 2. During filtration, maintain the pressure in the filter at 0.2-0.3MPa, monitor the pressure difference, and backwash when it reaches 0.1MPa. When backwashing is required, stop the discharge variable frequency pump 10 and start the reciprocating variable frequency pump 11. The reciprocating frequency pump has a flow rate of 30-35 cubic meters per hour and a pressure of 0.4-0.5 MPa. Backwashing takes 15-20 minutes, and impurities are discharged from the impurity outlet 17. (3) The filtered asphalt is sent to the oil storage tank 3 by the reciprocating frequency pump 11. The temperature inside the tank is maintained at 120-130℃. At the same time, the stirring paddle 19 is started at a speed of 30-40 revolutions per minute to prevent asphalt from settling and separating. When the unloading oil tank pipeline 12 is blocked or the oil level in the unloading oil tank reaches the warning height (20cm from the top of the tank), the relevant equipment alarms. In the former case, the pump is stopped, the emergency outlet 8 is opened, the oil is unloaded through the connecting pipeline 13, and the heat-conducting oil jacket 22 of the emergency outlet is turned on for heating; in the latter case, the unloading outlet 4 is closed, the emergency outlet 8 is opened, and the oil is unloaded to the normal level.

Claims

1. A safe oil unloading and storage device, characterized in that, It includes an oil unloading tank (1), which is connected to a filter (2) via a discharge variable frequency pump (10). The filter (2) is connected to an oil storage tank (3) via a reciprocating variable frequency pump (11). The inside of the oil unloading tank (1) is equipped with a heat transfer oil coil (6), and the outside of the filter (2) is equipped with a filter insulation sleeve (16). The heat transfer oil coil (6) is connected to the filter insulation sleeve (16) via a heating pipe (20). The inner side of the vertical wall of the oil unloading tank (1) is equipped with a tuning fork liquid level monitor (7).

2. The safe oil unloading and storage device according to claim 1, characterized in that, The unloading pool (1) is equipped with an unloading port (4) and a safety valve (5), and a level gauge (9) is installed on the vertical wall of the unloading pool (1).

3. The safe oil unloading and storage device according to claim 1, characterized in that, The unloading tank (1) is provided with an emergency discharge port (8) on its vertical wall. The bottom of the unloading tank (1) is connected to the discharge variable frequency pump (10) through the unloading tank pipeline (12). The emergency discharge port (8) is connected to the unloading tank pipeline (12) through the connecting pipeline (13).

4. The safe oil unloading and storage device according to claim 3, characterized in that, The emergency discharge port (8) is located 2 / 3-4 / 5 of the distance from the bottom surface of the oil unloading pool (1), and an emergency discharge port heat-conducting oil jacket (22) is provided on the outside of the emergency discharge port (8).

5. The safe oil unloading and storage device according to claim 1, characterized in that, The filter (2) is provided with a filter plate (15) inside, and an impurity outlet (17) is provided on the vertical wall of the filter (2), which is located above the filter plate (15).

6. The safe oil unloading and storage device according to claim 5, characterized in that, The discharge variable frequency pump (10) and the filter (2) are provided with an inlet pipe (14). The connection between the inlet pipe (14) and the filter (2) is located above the filter plate (15), and the connection between the reciprocating variable frequency pump (11) and the filter (2) is located below the filter plate (15).

7. The safe oil unloading and storage device according to claim 1, characterized in that, The reciprocating variable frequency pump (11) is provided with an oil inlet pipe (18) between it and the oil storage tank (3). The oil inlet pipe (18) is connected to an inlet and outlet pipe (21). The oil storage tank (3) is provided with an agitator (19).

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