Fuel supply system of diesel power station

Abstract

The utility model relates to a fuel oil supply system of a diesel power station, which comprises a rack, a main oil inlet pipeline and a main oil return pipeline are arranged on the rack, and a duplex filter, a parallel pumping device, a main filter and a first cooler are sequentially arranged on the main oil inlet pipeline in the direction from a diesel oil cabinet to an oil inlet of a diesel engine. A back pressure valve and a second cooler are sequentially arranged on the main oil return pipeline in the direction from an oil return opening of the diesel engine to the diesel oil cabinet, a branch pipeline is arranged on the main oil return pipeline and located between the back pressure valve and the second cooler, the other end of the branch pipeline is connected between the parallel pumping device and the main filter, and a pressure adjusting valve is arranged on the branch pipeline. The main filter is connected with a dirty oil collecting tank and a compressed air pipeline. According to the utility model, coarse impurities can be removed, the operation of the screw delivery pumps is prevented from being damaged, the two screw delivery pumps are standby for each other and can be maintained without shutdown, the main filter can ensure that the maximum particle diameter in diesel oil passing through does not exceed 10 microns, and the safety of a unit is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel fuel supply systems, and particularly to a fuel supply system for a diesel power station. Background Art

[0002] A diesel generator set is a power generation device fueled by diesel. It uses a diesel engine as the prime mover to drive a generator to generate electricity, which is a mechanical device that converts kinetic energy into electrical energy and heat energy. The diesel generator set has a fuel supply system that injects diesel into the combustion chamber regularly, at a constant pressure, and in a fixed quantity. In the existing fuel supply system, there is only one pumping device. Once a problem occurs, it needs to be shut down for maintenance. Moreover, if impurities in the diesel directly enter the generator set without being filtered, it will cause damage. Content of the Utility Model

[0003] The utility model aims to solve the deficiencies of the existing technology and provides a fuel supply system for a diesel power station.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A fuel supply system for a diesel power station includes a frame. On the frame, there are a main inlet pipeline connected between a diesel tank and the diesel engine inlet, and a main return pipeline connected between the diesel tank and the diesel engine return port. On the main inlet pipeline, in the direction from the diesel tank to the diesel engine inlet, there are successively a duplex filter, a parallel pumping device, a main filter, and a first cooler. On the main return pipeline, in the direction from the diesel engine return port to the diesel tank, there are successively a back pressure valve and a second cooler. A branch pipeline is provided between the back pressure valve and the second cooler on the main return pipeline, and the other end of the branch pipeline is connected between the parallel pumping device and the main filter. A pressure regulating valve is provided on the branch pipeline. The main filter is connected to a waste oil collection tank, and the waste oil collection tank is connected to an external return oil collection cabinet through a pneumatic pump. The main filter and the pneumatic pump are connected to a compressed air pipeline.

[0006] The parallel pumping device includes two parallel pumping pipelines. Each pumping pipeline is provided with a screw conveyor pump. The screw conveyor pump is provided with a pressure relief valve. The pumping pipeline is provided with an inlet stop valve at the front end of the screw conveyor pump and successively a check valve and an outlet stop valve at the rear end of the screw conveyor pump.

[0007] The main filter includes a manually operated filter and an automatic backwashing filter arranged in parallel. The automatic backwashing filter is connected to the compressed air pipeline.

[0008] Both the first cooler and the second cooler are connected to a seawater cooling water inlet pipeline and a seawater cooling water discharge pipeline. A Y-shaped filter is provided on the seawater cooling water inlet pipeline.

[0009] It also includes an electrical control box, which is electrically connected to the parallel pumping device, back pressure valve, pressure regulating valve, and pneumatic pump.

[0010] An oil collecting tray is provided below the main oil inlet pipe and the main oil return pipe on the frame, and an oil collecting tray sewage discharge outlet is provided at the bottom of the oil collecting tray.

[0011] The beneficial effects of the present utility model are as follows: The present utility model can remove some coarse impurities generated in the pipeline or during the installation process, prevent damage to the operation of the screw conveyor pump. The two screw conveyor pumps are used as backups for each other, enabling maintenance without shutting down the machine. The main filter can ensure that the maximum particle diameter of the diesel passing through does not exceed 10 μm, ensuring the safety of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] In the figure: 1 - diesel tank; 2 - diesel engine oil inlet; 3 - main oil inlet pipe; 4 - diesel engine oil return port; 5 - main oil return pipe; 6 - duplex filter; 7 - parallel pumping device; 8 - main filter; 9 - first cooler; 10 - back pressure valve; 11 - second cooler; 12 - branch pipe; 13 - pressure regulating valve; 14 - waste oil collection tank; 15 - pneumatic pump; 16 - external return oil collection cabinet; 17 - compressed air pipe; 18 - electrical control box; 19 - oil collecting tray; 20 - oil collecting tray sewage discharge outlet;

[0014] 71 - pumping pipeline; 72 - screw conveyor pump; 73 - pressure relief valve; 74 - inlet stop valve; 75 - check valve; 76 - outlet stop valve;

[0015] 81 - manual operation filter; 82 - automatic backwash filter;

[0016] The following will describe in detail with reference to the embodiments of the present utility model with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The embodiments are only used to explain the present utility model and are not intended to limit the scope of the present utility model. In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the embodiments of the present utility model.

[0018] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used herein in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0020] The following further describes this utility model in conjunction with the drawings and embodiments:

[0021] As Figure 1 shown, a fuel supply system for a diesel power station includes a frame. A main fuel inlet pipe 3 connected between a diesel tank 1 and a diesel engine fuel inlet 2 and a main fuel return pipe 5 connected between the diesel tank 1 and a diesel engine fuel return port 4 are provided on the frame. A duplex filter 6, a parallel pumping device 7, a main filter 8 and a first cooler 9 are successively provided on the main fuel inlet pipe 3 in the direction from the diesel tank 1 to the diesel engine fuel inlet 2. A back pressure valve 10 and a second cooler 11 are successively provided on the main fuel return pipe 5 in the direction from the diesel engine fuel return port 4 to the diesel tank 1. A branch pipe 12 is provided between the back pressure valve 10 and the second cooler 11 on the main fuel return pipe 5. The other end of the branch pipe 12 is connected between the parallel pumping device 7 and the main filter 8. A pressure regulating valve 13 is provided on the branch pipe 12. A waste oil collection tank 14 is connected to the main filter 8. The waste oil collection tank 14 is connected to an external return oil collection cabinet 16 through a pneumatic pump 15. A compressed air pipe 17 is connected to the main filter 8 and the pneumatic pump 15.

[0022] The back pressure valve 10 is used for post-pump pressure adjustment, and the adjustment range is: 2 - 5 bar. The pressure regulating valve 13 is used for main engine return pressure adjustment, and the adjustment range is: 4 - 12 bar.

[0023] It further includes an electrical control box 18. The electrical control box 18 is electrically connected to the parallel pumping device 7, the back pressure valve 10, the pressure regulating valve 13 and the pneumatic pump 15. The electrical control box 18 is connected to relevant power devices and control valves, and controls the opening and closing of the power devices.

[0024] Below the main oil inlet pipe 3 and the main oil return pipe 5 on the frame, there is an oil collecting tray 19, and an oil collecting tray sewage discharge outlet 20 is provided at the bottom of the oil collecting tray 19.

[0025] The main components of the utility model are installed on the frame and are jointly composed of a completed pipe system, valve parts, cables and other accessories and a control system.

[0026] The parallel pumping device 7 includes two parallel pumping pipes 71. A screw conveyor pump 72 is provided on each pumping pipe 71. The screw conveyor pump 72 is provided with a pressure relief valve 73. An inlet stop valve 74 is provided at the front end of the screw conveyor pump 72 on the pumping pipe 71, and a check valve 75 and an outlet stop valve 76 are successively provided at the rear end of the screw conveyor pump 72.

[0027] Each supply pump, that is, the screw conveyor pump 72, is equipped with a pressure relief valve 73, and the adjustable setting is 6 bar. The two screw conveyor pumps 72 are integrated together on a common base, equipped with a motor, an inlet stop valve 74, and a check valve 75 and an outlet stop valve 76 at the outlet of each pump.

[0028] The two screw conveyor pumps 72 are in standby for each other. The pressure of the screw conveyor pump 72: 6 bar, the rotational speed: 1440 rpm, the normal power <1 kW, and the rated power does not exceed 2.2 kW.

[0029] The main filter 8 includes a manually operated filter 81 and an automatic backwashing filter 82 arranged in parallel. The automatic backwashing filter 82 is connected to the compressed air pipe 17. The automatic backwashing filter 82 is backwashed by a pneumatic motor. The discharge of the main filter 8 is set at intervals by the electrical control box 18 of the control unit. The slag is discharged into the waste oil collection tank 14, and the output of the pneumatic pump 15 is controlled by a liquid level switch, and the output pressure is not greater than 4 bar. A three-way conversion valve is provided between the manually operated filter 81 and the automatic backwashing filter 82.

[0030] The accuracy of the main filter 8: 10 μm, the material: the outer shell is ductile iron, the pressure drop: <0.06 MPa.

[0031] Temperature gauges, pressure gauges, temperature transmitters, pressure transmitters, etc. are equipped at corresponding positions on the main oil inlet pipe 3 and the main oil return pipe 5.

[0032] The first cooler 9 and the second cooler 11 are used for cooling the host return temperature. The first cooler 9 and the second cooler 11 are both connected with a seawater cooling water inlet pipe and a seawater cooling water discharge pipe. A Y-shaped filter is provided on the seawater cooling water inlet pipe. The seawater cooling water inlet pipe ensures that the particle size does not exceed 200 μm.

[0033] When the utility model is working, the diesel (with a certain pressure) in the diesel tank 1 passes through a double filter 6 (used to remove some coarse impurities generated in the pipeline or during the installation process to prevent damage to the operation of the screw delivery pump 72) and enters the parallel pumping device 7 for pressurization, and then passes through a main filter 8 (used to ensure that the maximum particle diameter of the diesel passing through does not exceed 10μm), is cooled by a plate cooler, i.e., the first cooler 9, and enters the main engine. The return oil of the main engine is cooled again by a reflux plate cooler, i.e., the second cooler 11, and returns to the diesel tank 1.

[0034] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A fuel supply system for a diesel power station, characterized in that: The invention comprises a frame, on which a main oil inlet pipeline (3) connected between a diesel tank (1) and a diesel engine oil inlet (2) and a main oil return pipeline (5) connected between the diesel tank (1) and a diesel engine oil return port (4) are provided, the main oil inlet pipeline (3) being provided with a double filter (6), a parallel pumping device (7), a main filter (8) and a first cooler (9) in sequence from the diesel tank (1) to the diesel engine oil inlet (2), and the main oil return pipeline (5) being provided with a back pressure valve (10), a second cooler (9) in sequence from the diesel engine oil return port (4) to the diesel tank (1). A main oil return pipeline (5) is provided with a branch pipeline (12) between the back pressure valve (10) and the second cooler (11); the other end of the branch pipeline (12) is connected between the parallel pumping device (7) and the main filter (8); a pressure regulating valve (13) is provided on the branch pipeline (12); the main filter (8) is connected to a dirty oil collection tank (14); the dirty oil collection tank (14) is connected to an external return oil material collection cabinet (16) through a pneumatic pump (15); and the main filter (8) and the pneumatic pump (15) are connected to a compressed air pipeline (17).

2. A fuel supply system for a diesel power station according to claim 1, characterized in that: The parallel pumping device (7) comprises two parallel pumping pipelines (71), each of which is provided with a screw delivery pump (72), the screw delivery pump (72) being provided with a pressure relief valve (73), the pumping pipeline (71) being provided with an inlet stop valve (74) at the front end of the screw delivery pump (72) and a check valve (75) and an outlet stop valve (76) in sequence at the rear end of the screw delivery pump (72).

3. A fuel supply system for a diesel power station according to claim 2, characterized in that: The main filter (8) comprises a manually operated filter (81) and an automatic backflushing filter (82) which are arranged in parallel, and the automatic backflushing filter (82) is connected to the compressed air pipeline (17).

4. A fuel supply system for a diesel power station according to claim 3, characterized in that: The first cooler (9) and the second cooler (11) are both connected to a seawater cooling water inlet pipe and a seawater cooling water outlet pipe, and a Y-shaped filter is provided on the seawater cooling water inlet pipe.

5. A fuel supply system for a diesel power station according to claim 4, characterized in that: It also includes an electrical control box (18), which is electrically connected to the parallel pumping device (7), the back pressure valve (10), the pressure regulating valve (13), and the pneumatic pump (15).

6. A fuel supply system for a diesel power station according to claim 5, characterized in that: An oil collecting pan (19) is provided on the frame below the main oil inlet pipeline (3) and the main oil return pipeline (5), and an oil collecting pan sewage discharge outlet (20) is provided at the bottom of the oil collecting pan (19).

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