Closed fuel oil discharge and reinjection system for fuel oil tank

Abstract

The utility model provides a closed fuel oil discharge and reinjection system for a fuel oil tank, which comprises the fuel oil tank, a fuel oil pump, a fuel oil pump inlet pipeline, a fuel oil pump outlet pipeline, an oil return pipeline, a return valve, a fuel oil tank oil filling pipeline and an oil discharge pipeline, the fuel oil pump is connected with the return valve through a fuel oil pump outlet pipeline, the return valve is connected with the fuel oil tank through the oil return pipeline, the fuel oil tank oil filling pipeline is connected with the fuel oil tank, one end of the oil discharge pipeline is connected with the fuel oil pump outlet pipeline, and the other end of the oil discharge pipeline is connected with the fuel oil tank. And the other end of the oil discharge pipeline is connected with the fuel oil tank oil filling pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel oil systems for heating furnaces in long-distance pipeline stations, and in particular to a closed-loop fuel oil discharge and reinjection system for fuel oil tanks. Background Technology

[0002] The fuel oil system for the pipeline heater is an auxiliary system of the heater. It mainly includes fuel oil tanks, fuel oil pumps, fuel oil pipelines, and valves. The fuel oil tanks store fuel oil, which is supplied to the heater through the pumps, pipelines, and valves. When major repairs are needed to address problems in the fuel oil tanks, the fuel oil inside must be emptied. Currently, the common method is to use tanker trucks to extract the fuel oil and then reinject it into other storage tanks or pipelines. This method requires renting tanker trucks, which is costly. Furthermore, it is quite dangerous, mainly due to the risks of fuel oil leaks and tanker truck fires. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a closed-loop fuel oil draining and reinjection system for fuel oil tanks, addressing the shortcomings of existing technologies.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A closed-loop fuel oil draining and reinjection system for fuel oil tanks includes: a fuel oil tank, a fuel oil pump, a fuel oil pump inlet pipe, a fuel oil pump outlet pipe, a return oil pipe, a reflux valve, a fuel oil tank refueling pipe, and a drain pipe. The fuel oil tank is connected to the fuel oil pump through the fuel oil pump inlet pipe. The fuel oil pump is connected to the reflux valve through the fuel oil pump outlet pipe. The reflux valve is connected to the fuel oil tank through the return oil pipe. The fuel oil tank refueling pipe is connected to the fuel oil tank. One end of the drain pipe is connected to the fuel oil pump outlet pipe, and the other end of the drain pipe is connected to the fuel oil tank refueling pipe.

[0005] The beneficial effects of adopting this utility model's technical solution are as follows: Utilizing the existing fuel oil system process, with the fuel oil pump as the reinjection power source, the fuel oil tank draining process is modified based on the existing fuel oil circulation supply system. The fuel oil pump outlet pipeline is connected to the fuel oil tank filling pipeline, the fuel oil pump is started, and the reinjection process is initiated, achieving efficient and safe fuel oil tank draining and reinjection. Increasing the fuel oil pump outlet pressure, when it exceeds the fuel oil tank filling pipeline pressure, enables the discharge of crude oil from the fuel oil tank. Through a simple modification to the existing fuel oil supply and circulation system, the discharge of fuel oil from the fuel tank is achieved, thus preparing for major fuel oil tank repairs.

[0006] Furthermore, a first valve is installed on the fuel oil pump inlet pipeline near the fuel oil tank, a second valve is installed on the return oil pipeline near the fuel oil tank, a third valve is installed on the fuel oil tank refueling pipeline near the fuel oil tank, and a fourth and a fifth valve are installed on the fuel oil tank refueling pipeline away from the fuel oil tank.

[0007] The beneficial effects of adopting the above-mentioned further technical solution are: the arrangement of the first to fifth valves facilitates the opening and closing of the connection between the fuel tank and various pipelines according to actual needs. It also facilitates the installation and maintenance of various pipelines and the fuel tank.

[0008] Furthermore, a sixth valve and a check valve are installed on the oil drain line.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: the sixth valve is used to open and close the drain line. The check valve is used to prevent fuel from flowing back into the drain line.

[0010] Furthermore, the sixth valve is a shut-off valve.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the sixth valve is used to open and close the oil drain pipeline.

[0012] Furthermore, an electric heating cable is installed on the oil drain line.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the electric heating tape facilitates the heating of the oil drain line and facilitates the temperature regulation of the fuel in the oil drain line.

[0014] Furthermore, the fuel tank refueling pipeline is connected to a storage tank, and the reflux valve is connected in parallel to a heating furnace via a pipeline.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are: the installation of the oil storage tank facilitates the collection and storage of fuel oil; the return valve is connected in parallel to the heater through a pipeline, facilitating the supply of oil from the fuel tank to the heater.

[0016] Furthermore, the fuel oil pump is equipped with a fuel oil pump inlet valve and a fuel oil pump outlet valve. The fuel oil pump inlet valve is connected to the fuel oil pump inlet pipeline, and the fuel oil pump outlet valve is connected to the fuel oil pump outlet pipeline.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the fuel oil pump inlet valve and the fuel oil pump outlet valve facilitates the opening and closing of the fuel oil pump inlet and outlet, and facilitates the installation and maintenance of the fuel oil pump.

[0018] Furthermore, the fuel oil pump is a positive displacement pump, and there are three fuel oil pumps connected in parallel.

[0019] The beneficial effects of adopting the above-mentioned further technical solutions are: multiple fuel oil pumps are connected in parallel, which improves working efficiency, prevents the failure of one fuel oil pump from affecting normal operation, and improves the stability and reliability of the fuel oil tank closed-loop discharge and reinjection system.

[0020] Furthermore, two filter mechanisms are installed on the fuel oil pump inlet pipe, and the two filter mechanisms are connected in parallel.

[0021] The beneficial effects of adopting the above-mentioned further technical solutions are: the filter mechanism is used to filter the fuel oil, prevent impurities in the fuel oil from entering the heating furnace, and improve the stability and reliability of the fuel oil tank closed-loop fuel oil discharge and reinjection system.

[0022] Furthermore, the filtration mechanism includes: a pair of seventh valves and a filter, wherein the pair of seventh valves are connected to the filter via pipelines, and the filter is located between the pair of seventh valves.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the filter is used to filter the fuel oil, preventing impurities in the fuel oil from entering the heating furnace, and improving the stability and reliability of the fuel oil tank's closed-loop fuel oil drain and reinjection system. The installation and maintenance of the filter are facilitated by the pair of seventh valves.

[0024] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the fuel oil tank closed-loop oil discharge and reinjection system provided in an embodiment of the present utility model.

[0026] Explanation of reference numerals: 1. Fuel tank; 2. Fuel pump; 3. Fuel pump inlet pipe; 4. Fuel pump outlet pipe; 5. Return pipe; 6. Return valve; 7. Fuel tank refueling pipe; 8. Discharge pipe; 9. First valve; 10. Second valve; 11. Third valve; 12. Fourth valve; 13. Fifth valve; 14. Sixth valve; 15. Check valve; 16. Heating furnace; 17. Fuel pump inlet valve; 18. Fuel pump outlet valve; 19. Seventh valve; 20. Filter. Detailed Implementation

[0027] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0028] like Figure 1 As shown in the figure, this utility model embodiment provides a closed-loop fuel oil draining and reinjection system for a fuel oil tank, including: a fuel oil tank 1, a fuel oil pump 2, a fuel oil pump inlet pipe 3, a fuel oil pump outlet pipe 4, a return oil pipe 5, a reflux valve 6, a fuel oil tank filling pipe 7, and a drain pipe 8. The fuel oil tank 1 is connected to the fuel oil pump 2 through the fuel oil pump inlet pipe 3. The fuel oil pump 2 is connected to the reflux valve 6 through the fuel oil pump outlet pipe 4. The reflux valve 6 is connected to the fuel oil tank 1 through the return oil pipe 5. The fuel oil tank filling pipe 7 is connected to the fuel oil tank 1. One end of the drain pipe 8 is connected to the fuel oil pump outlet pipe 4, and the other end of the drain pipe 8 is connected to the fuel oil tank filling pipe 7.

[0029] The beneficial effects of adopting this utility model's technical solution are as follows: Utilizing the existing fuel oil system process, with the fuel oil pump as the reinjection power source, the fuel oil tank draining process is modified based on the existing fuel oil circulation supply system. The fuel oil pump outlet pipeline is connected to the fuel oil tank filling pipeline, the fuel oil pump is started, and the reinjection process is initiated, achieving efficient and safe fuel oil tank draining and reinjection. Increasing the fuel oil pump outlet pressure, when it exceeds the fuel oil tank filling pipeline pressure, enables the discharge of crude oil from the fuel oil tank. Through a simple modification to the existing fuel oil supply and circulation system, the discharge of fuel oil from the fuel tank is achieved, thus preparing for major fuel oil tank repairs.

[0030] This utility model provides a closed-loop fuel oil draining and reinjection system for fuel oil tanks. Utilizing the existing fuel oil system process, it designs the fuel oil tank refueling process in reverse through reverse thinking. Using the heater fuel oil pump as the reinjection power source, it modifies the draining process of the heater fuel oil tank based on the existing fuel oil circulation supply system. The fuel oil pump outlet manifold is connected to the fuel oil tank refueling pipeline, and the fuel oil pump is started to conduct the reinjection process, achieving efficient and safe fuel oil tank draining and reinjection.

[0031] like Figure 1 As shown, further, a first valve 9 is installed on the fuel oil pump inlet pipe 3 near the fuel oil tank 1, a second valve 10 is installed on the return oil pipe 5 near the fuel oil tank 1, a third valve 11 is installed on the fuel oil tank filling pipe 7 near the fuel oil tank 1, and a fourth valve 12 and a fifth valve 13 are installed on the fuel oil tank filling pipe 7 away from the fuel oil tank 1.

[0032] The beneficial effects of adopting the above-mentioned further technical solution are: the arrangement of the first to fifth valves facilitates the opening and closing of the connection between the fuel tank and various pipelines according to actual needs. It also facilitates the installation and maintenance of various pipelines and the fuel tank.

[0033] like Figure 1 As shown, the oil drain line 8 is further equipped with a sixth valve 14 and a check valve 15.

[0034] The beneficial effects of adopting the above-mentioned further technical solution are: the sixth valve is used to open and close the drain line. The check valve is used to prevent fuel from flowing back into the drain line.

[0035] like Figure 1 As shown, the sixth valve 14 is further described as a shut-off valve.

[0036] The beneficial effect of adopting the above-mentioned further technical solution is that the sixth valve is used to open and close the oil drain pipeline.

[0037] like Figure 1 As shown, an electric heating tape is further installed on the oil drain line 8.

[0038] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the electric heating tape facilitates the heating of the oil drain line and facilitates the temperature regulation of the fuel in the oil drain line.

[0039] like Figure 1 As shown, the fuel oil tank filling pipeline 7 is further connected to an oil storage tank, and the return valve 6 is connected in parallel to a heating furnace 16 through a pipeline.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are: the installation of the oil storage tank facilitates the collection and storage of fuel oil; the return valve is connected in parallel to the heater through a pipeline, facilitating the supply of oil from the fuel tank to the heater.

[0041] like Figure 1 As shown, the fuel oil pump 2 is further equipped with a fuel oil pump inlet valve 17 and a fuel oil pump outlet valve 18. The fuel oil pump inlet valve 17 is connected to the fuel oil pump inlet pipeline 3, and the fuel oil pump outlet valve 18 is connected to the fuel oil pump outlet pipeline 4.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are: the setting of the fuel oil pump inlet valve and the fuel oil pump outlet valve facilitates the opening and closing of the fuel oil pump inlet and outlet, and facilitates the installation and maintenance of the fuel oil pump.

[0043] like Figure 1 As shown, the fuel oil pump 2 is a positive displacement pump, and there are three fuel oil pumps 2 connected in parallel.

[0044] The beneficial effects of adopting the above-mentioned further technical solutions are: multiple fuel oil pumps are connected in parallel, which improves working efficiency, prevents the failure of one fuel oil pump from affecting normal operation, and improves the stability and reliability of the fuel oil tank closed-loop discharge and reinjection system.

[0045] like Figure 1 As shown, further, two filter mechanisms are installed on the fuel oil pump inlet pipe 3, and the two filter mechanisms are connected in parallel.

[0046] The beneficial effects of adopting the above-mentioned further technical solutions are: the filter mechanism is used to filter the fuel oil, prevent impurities in the fuel oil from entering the heating furnace, and improve the stability and reliability of the fuel oil tank closed-loop fuel oil discharge and reinjection system.

[0047] like Figure 1 As shown, the filtration mechanism further includes a pair of seventh valves 19 and a filter 20, wherein the pair of seventh valves 19 are connected to the filter 20 via pipelines, and the filter 20 is located between the pair of seventh valves 19.

[0048] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the filter is used to filter the fuel oil, preventing impurities in the fuel oil from entering the heating furnace, and improving the stability and reliability of the fuel oil tank's closed-loop fuel oil drain and reinjection system. The installation and maintenance of the filter are facilitated by the pair of seventh valves.

[0049] By simply modifying the existing fuel oil supply and circulation system, the fuel oil (fuel oil) in the fuel tank can be discharged, thus preparing for major overhauls of the fuel tank. This method offers advantages such as simple operation, economy, safety, and high efficiency.

[0050] This utility model provides a closed-loop fuel oil draining and reinjection system for fuel oil tanks. The system (closed-loop fuel oil draining and reinjection system for fuel oil tanks) specifically includes: a fuel oil tank, a fuel oil pump, fuel oil pipelines, and valves.

[0051] Add a drain line to the fuel pump outlet pipeline and connect it to the fuel tank refueling pipeline. Install one shut-off valve and one check valve. Install electric heating tape on the newly installed fuel pipeline (drain line) and ensure proper insulation (an insulation layer can be added to the outside of the heating tape). Provide several pipe supports to support each pipeline. Two hot work openings are required: one on the fuel pump outlet pipeline and one on the fuel tank refueling pipeline.

[0052] Fuel tank draining procedure: Fully open valves #1 (first valve) and #2 (second valve) at the bottom of the fuel tank. Close valve #3 (third valve) at the fuel tank's refueling root valve. Open valves #4 (fourth valve) and #5 (fifth valve, fuel tank root valve or low-pressure side pipeline refueling valve, etc.) at the upstream of the fuel tank's refueling pipeline. Fully open the fuel pump's inlet and outlet valves (fuel pump inlet and outlet valves; the fuel pump is a positive displacement pump, open the valves before starting the pump) to start the fuel pump, putting the fuel system into circulation. Gradually close the return valve in the circulation pipeline to increase the outlet pressure of the fuel pump. When the fuel pump outlet pressure is higher than the fuel tank refueling pipeline pressure, the crude oil draining function of the fuel tank is achieved.

[0053] Fuel oil tank discharge completion process recovery operation: Shut down the fuel oil pump, close the return valve #6 (sixth valve), close the return valve #4 (fourth valve) and valve #5 (fifth valve), close the fuel oil tank valve #3 (third valve), and adjust the fuel oil system return valve (return valve) to the valve position required for normal heating furnace operation.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A closed-loop fuel oil draining and reinjection system for fuel oil tanks, characterized in that, include: The system includes a fuel tank, a fuel pump, a fuel pump inlet pipe, a fuel pump outlet pipe, a return pipe, a reflux valve, a fuel tank refueling pipe, and a drain pipe. The fuel tank is connected to the fuel pump via the fuel pump inlet pipe. The fuel pump is connected to the reflux valve via the fuel pump outlet pipe. The reflux valve is connected to the fuel tank via the return pipe. The fuel tank refueling pipe is connected to the fuel tank. One end of the drain pipe is connected to the fuel pump outlet pipe, and the other end of the drain pipe is connected to the fuel tank refueling pipe.

2. The fuel oil tank closed-loop oil discharge and reinjection system according to claim 1, characterized in that, A first valve is installed on the fuel oil pump inlet pipeline near the fuel oil tank, a second valve is installed on the return oil pipeline near the fuel oil tank, a third valve is installed on the fuel oil tank filling pipeline near the fuel oil tank, and a fourth and a fifth valve are installed on the fuel oil tank filling pipeline away from the fuel oil tank.

3. The fuel oil tank closed-loop oil discharge and reinjection system according to claim 1, characterized in that, The oil drain line is equipped with a sixth valve and a check valve.

4. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 3, characterized in that, The sixth valve is a stop valve.

5. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 1, characterized in that, An electric heat tracing cable is installed on the oil drain line.

6. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 1, characterized in that, The fuel tank refueling pipeline is connected to a storage tank, and the reflux valve is connected in parallel to a heating furnace via a pipeline.

7. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 1, characterized in that, The fuel oil pump is equipped with a fuel oil pump inlet valve and a fuel oil pump outlet valve. The fuel oil pump inlet valve is connected to the fuel oil pump inlet pipeline, and the fuel oil pump outlet valve is connected to the fuel oil pump outlet pipeline.

8. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 1, characterized in that, The fuel oil pump is a positive displacement pump, and there are three fuel oil pumps connected in parallel.

9. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 1, characterized in that, Two filter mechanisms are installed on the fuel oil pump inlet pipe, and the two filter mechanisms are connected in parallel.

10. A closed-loop fuel oil draining and reinjection system for fuel oil tanks according to claim 9, characterized in that, The filtration mechanism includes a pair of seventh valves and a filter, wherein the pair of seventh valves are connected to the filter via pipelines, and the filter is located between the pair of seventh valves.

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