A multi-fuel combustion test method with replaceable combustion chamber

Abstract

A kind of replaceable combustion chamber multi-fuel combustion test method, the test device for realizing the method mainly includes filter, pressure stabilizing valve, flowmeter, exhaust valve, pressure-regulating valve, turbine, air compressor, replaceable combustion chamber, liquid fuel pipeline, gaseous fuel pipeline, lubricating oil pipeline etc..The combustion chamber is provided with liquid fuel inlet and gaseous fuel inlet, and supports multiple air inlets simultaneously.According to different fuel compositions, different forms of combustion chamber can be replaced for combustion chamber and fuel combustion test.The combustion chamber outlet is connected to the expansion turbine for exhaust gas utilization, and the turbine drives the air compressor to work to generate high-pressure gas, which enters the combustion chamber through parallel pipeline.

Description

Technical Field

[0001] This invention relates to the field of fuel testing, and more particularly to a multi-fuel combustion testing method with a replaceable combustion chamber. Background Technology

[0002] Currently, the existing testing methods in China all involve burning fuel in a single combustion chamber. This method not only limits the types of fuel that can be tested, but also results in low utilization of exhaust energy, with most of the fuel combustion energy being directly dissipated into the external environment in the form of exhaust gas. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems in the prior art and provide a multi-fuel combustion test method with replaceable combustion chambers and self-circulating energy utilization. Different types of combustion chambers can be replaced for different fuel compositions for combustion testing of the combustion chamber and fuel. At the same time, an expansion turbine is used to form a self-circulating working condition to utilize exhaust gas and reduce energy loss.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-fuel combustion test method with a replaceable combustion chamber includes the following two operating conditions:

[0006] Under main operating conditions: The compressor at the main air intake works, and high-pressure gas enters the filter. The filtered air is then divided into multiple paths and enters the combustion chamber after passing through the pressure regulating valve and the first flow meter to meet the combustion characteristics of different fuels and ensure complete combustion of fuel in the combustion chamber. At the same time, liquid fuel and gaseous fuel enter the combustion chamber through the liquid fuel pipeline and the gaseous fuel pipeline to start combustion. The exhaust gas generated in the combustion chamber drives the turbine to rotate and is then discharged through the pipeline. The compressor, as a power-consuming component, is driven by the turbine to draw air into the pipeline and then discharge it through the compressor exhaust port.

[0007] In self-circulation mode: the exhaust gas generated in the combustion chamber drives the turbine, which in turn drives the compressor to do work, drawing air into the pipeline. After passing through the back pressure regulating valve and the second flow meter, the air enters the filter through the second valve. The filtered air is then divided into multiple paths and enters the combustion chamber after passing through the pressure regulating valve and the first flow meter. The exhaust gas generated continues to drive the turbine, thus forming a self-circulation process.

[0008] The apparatus used in the testing method of this invention includes a filter, a pressure regulating valve, a first flow meter, a combustion chamber, a turbine, a compressor, a back pressure regulating valve, a second flow meter, and an exhaust valve. A first valve is provided at the main air inlet, which is connected to the filter via a pipeline. A pressure regulating valve is arranged after the filter and connected in series with the first flow meter via a pipeline. Subsequently, multiple pipelines connect to the combustion chamber, which also has liquid fuel pipelines and gaseous fuel pipelines. The combustion chamber is connected to the turbine via a pipeline. A pipeline is connected to one side of the turbine to discharge exhaust gas, and a compressor is arranged on the other side of the turbine. One side of the compressor is a bypass air inlet, and the other side of the compressor is connected to the back pressure regulating valve via a pipeline. A second flow meter is arranged after the back pressure regulating valve, and an exhaust valve is provided between the second flow meter and the second valve. Finally, the second valve is connected to the filter via a pipeline.

[0009] The invention also includes a lubricating oil system and lubricating oil pipelines, wherein the lubricating oil system delivers engine oil to the bearings of the rotors of the turbine and compressor through the lubricating oil pipelines to provide lubrication.

[0010] The combustion chamber is a barrel-shaped combustion chamber, and flanges are installed at the connection between the combustion chamber and other components. The entire combustion chamber can be replaced by removing and installing the flanges.

[0011] Compared with the prior art, the beneficial effects achieved by the technical solution of this invention are:

[0012] 1. This test method can be used to conduct combustion tests on different single fuels and blended fuels by changing different combustion chambers.

[0013] 2. The self-circulation mode of this test method can utilize the energy carried by the exhaust gas generated in the main combustion chamber, thereby saving operating costs and meeting energy-saving requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0015] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0016] Figure 3 This is a diagram of the testing method of the present invention. Detailed Implementation

[0017] To make the technical problems, technical solutions and beneficial effects of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1-2As shown, the apparatus used in the test method of the present invention includes a first valve 1, a filter 3, a pressure regulating valve 4, a first flow meter 6, a combustion chamber 8, a turbine 13, a compressor 14, a back pressure regulating valve 16, a second flow meter 19, an exhaust valve 20, and a second valve 21.

[0019] The first valve 1 is connected to the filter 3 via pipe 2. A pressure regulating valve 4 is arranged after the filter 3 and connected in series with the first flow meter 6 via pipe 5. Then, it is connected to the combustion chamber 8 via multiple pipes. The combustion chamber 8 is also provided with a liquid fuel pipe 7 and a gaseous fuel pipe 17. The combustion chamber 8 is connected to the turbine 13 via pipe 9. One side of the turbine 13 is connected to a pipe 12 to discharge exhaust gas. A compressor 14 is arranged on the other side of the turbine 13. One side of the compressor 14 is connected to a bypass air inlet via pipe 15. The other side of the compressor 14 is connected to the back pressure regulating valve 16 via pipe. A second flow meter 19 is arranged after the back pressure regulating valve 16. An exhaust valve 20 is provided between the second flow meter 19 and the second valve 21. Finally, the second valve 21 is connected to the filter 3 via pipe 22.

[0020] The present invention also includes a lubricating oil system 10 and a lubricating oil pipeline 11, wherein the lubricating oil system 10 introduces engine oil to the bearings of the rotors of the turbine 13 and the compressor 14 through the lubricating oil pipeline 11 to provide lubrication.

[0021] The combustion chamber 8 is a barrel-shaped combustion chamber. Flanges are installed at the connection points between the combustion chamber 8 and other components. The entire combustion chamber can be replaced by removing and installing the flanges.

[0022] See Figure 3 The testing method of this invention includes the following two working conditions:

[0023] I. Under the main operating condition: First valve 1 is open, second valve 21 is closed, and exhaust valve 20 is open;

[0024] The compressor at the main air intake starts working, and the high-pressure gas enters the filter 3 through pipe 2 to filter impurities in the air;

[0025] The filtered air enters pipe 5, and the pressure and flow rate in the pipe are maintained by pressure regulating valve 4 and first flow meter 6. Then it is divided into multiple paths to enter combustion chamber 8 to meet the combustion characteristics of different fuels and ensure that the fuel in the combustion chamber is fully burned.

[0026] Simultaneously, liquid fuel and gaseous fuel enter the combustion chamber 8 through liquid fuel pipeline 7 and gaseous fuel pipeline 17 to begin combustion;

[0027] Combustion chamber 8 can be replaced according to different fuel compositions to conduct combustion tests on different fuels;

[0028] The exhaust gas generated in the combustion chamber 8 drives the turbine 13 through the pipe 9 and is then discharged through the pipe 12; the first valve 1 is always open, the second valve 21 is closed, and the exhaust valve 20 is open; the compressor 14, as a power-consuming component, is driven by the turbine 13 to draw air into the pipe 15 and then discharge it through the compressor 14 exhaust port.

[0029] II. Under self-circulation operation: First valve 1 is closed, second valve 21 is open, and exhaust valve 20 is closed;

[0030] The exhaust gas generated in combustion chamber 8 drives turbine 13, which in turn drives compressor 14 to perform work, drawing air into pipe 15 and then into pipe 18. The back pressure regulating valve 16 and the second flow meter 19 maintain the pipe pressure and regulate the air flow. The air then enters pipe 22 through the second valve 21 and is filtered by filter 3 to remove impurities. The filtered air enters pipe 5, where the pressure regulating valve 4 and the first flow meter 6 ensure the pressure and flow rate. The air is then divided into multiple streams and enters combustion chamber 8. The exhaust gas generated continues to drive turbine 13, thus forming a self-circulation process.

Claims

1. A multi-fuel combustion test method with a replaceable combustion chamber, characterized in that: Under the main operating condition: the compressor at the main air intake works, and the high-pressure gas enters the filter (3). The filtered air is divided into multiple paths and enters the combustion chamber (8) after passing through the pressure regulating valve (4) and the first flow meter (6) to meet the combustion characteristics of different fuels and ensure that the fuel in the combustion chamber is fully burned. At the same time, liquid fuel and gaseous fuel enter the combustion chamber (8) through the liquid fuel pipeline (7) and the gaseous fuel pipeline (17) to start combustion. The exhaust gas generated in the combustion chamber (8) drives the turbine (13) to run and is then discharged through the pipeline. The compressor (14) is driven by the turbine (13) as a power-consuming component. It draws air into the pipeline and then discharges it through the compressor (14) exhaust port. Under self-circulation operation: the exhaust gas generated in the combustion chamber (8) drives the turbine (13), the turbine (13) drives the compressor (14) to work, draws air into the pipeline, and then enters the filter (3) through the back pressure regulating valve (16) and the second flow meter (19) and the second valve (21). The filtered air enters the combustion chamber (8) through multiple paths after passing through the pressure regulating valve (4) and the first flow meter (6). The generated exhaust gas continues to drive the turbine (13), thus forming a self-circulation process. The apparatus used in the test method includes a first valve (1), a filter (3), a pressure regulating valve (4), a first flow meter (6), a combustion chamber (8), a turbine (13), a compressor (14), a back pressure regulating valve (16), a second flow meter (19), an exhaust valve (20), and a second valve (21). The first valve (1) is connected to the filter (3) via a pipe. The pressure regulating valve (4) is arranged after the filter (3) and connected in series with the first flow meter (6) via a pipe. Subsequently, the combustion chamber (8) is connected by multiple pipes. The combustion chamber (8) is also equipped with a liquid fuel pipe (7) and... A gaseous fuel pipeline (17) is connected to a combustion chamber (8) via a pipeline to a turbine (13). A pipeline is connected to one side of the turbine (13) to discharge exhaust gas. A compressor (14) is arranged on the other side of the turbine (13). A bypass air inlet is located on one side of the compressor (14). The other side of the compressor (14) is connected to a back pressure regulating valve (16) via a pipeline. A second flow meter (19) is arranged after the back pressure regulating valve (16). An exhaust valve (20) is provided between the second flow meter (19) and the second valve (21). Finally, the second valve (21) is connected to a filter (3) via a pipeline. The combustion chamber (8) is a barrel-shaped combustion chamber. Flanges are installed at the connection between the combustion chamber (8) and other components. The combustion chamber can be replaced as a whole by removing and installing the flanges.

2. The multi-fuel combustion test method with a replaceable combustion chamber as described in claim 1, characterized in that: It also includes a lubrication system (10) and a lubrication line (11), the lubrication system (10) introducing oil through the lubrication line (11) to the bearings of the rotor on the turbine (13) and compressor (14) to provide lubrication.

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