A pretreatment system for engine black carbon emission testing

Abstract

The present invention belongs to the technical field of engine detection, and discloses a pretreatment system for engine black carbon emission testing, the pretreatment system for engine black carbon emission testing comprises a reactor, an air intake pipe and an air outlet pipe, the reactor comprises a desulfurization adsorber and an oxidation catalyst, the desulfurization adsorber is used to remove sulfides in engine exhaust gas, the oxidation catalyst is used to remove organic compounds in engine exhaust gas, and the air intake pipe, the desulfurization adsorber, the oxidation catalyst and the air outlet pipe are connected in sequence. The pretreatment system for engine black carbon emission testing provided by the present invention effectively eliminates the influence of other components on the measurement of black carbon concentration in engine exhaust gas, so that the measurement of black carbon concentration in engine exhaust gas is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of engine detection, and in particular to a pretreatment system for engine black carbon emission testing. Background Art

[0002] At present, the International Maritime Organization is paying more and more attention to the black carbon emissions from ships, and the measurement and research of black carbon emissions are also becoming more and more important. The black carbon emissions can be obtained by measuring the black carbon content in the exhaust pipe.

[0003] However, during the combustion process of ship engine fuel, a large amount of particulate matter will be produced. In addition to black carbon, these particulate matter also includes a large amount of sulfate, water, semi-volatile organic compounds, volatile organic compounds and ash. When the engine exhaust gas is directly put into the test instrument for detection, these components will cause certain deviations in the measurement of black carbon. Summary of the invention

[0004] The purpose of the present invention is to provide a pretreatment system for engine black carbon emission testing, which can pretreat the engine exhaust gas so that the component of the engine exhaust gas finally entering the test instrument is relatively pure black carbon, thereby eliminating the influence of other components on the measurement of black carbon concentration in the engine exhaust gas.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A pretreatment system for engine black carbon emission testing comprises a reactor, an air intake pipe and an air outlet pipe. The reactor comprises a desulfurization adsorber and an oxidation catalyst. The desulfurization adsorber is used to remove sulfides in engine exhaust gas. The oxidation catalyst is used to remove organic compounds in engine exhaust gas. The air intake pipe, the desulfurization adsorber, the oxidation catalyst and the air outlet pipe are connected in sequence.

[0007] Optionally, the surface of the reactor is coated with a first high-temperature heating belt, and the first high-temperature heating belt is used to heat the desulfurization adsorber and the oxidation catalyst.

[0008] Optionally, the air intake pipe is covered with a second high-temperature heating belt, and the second high-temperature heating belt is used to heat the air intake pipe.

[0009] Optionally, a methane storage device is also included, which is connected to the desulfurization adsorber, and the methane in the methane storage device is used to reduce the desulfurization agent in the desulfurization adsorber.

[0010] Optionally, a nitrogen storage device is also included, which is connected to the desulfurization adsorber, and the nitrogen in the nitrogen storage device is used to prevent methane from chemically reacting with other components.

[0011] Optionally, both the methane storage device and the nitrogen storage device are connected to the desulfurization adsorber through a first pipeline, and a first valve is provided on the first pipeline.

[0012] Optionally, a second valve is provided on the air intake pipe, the first end of the first pipeline is connected to the air intake pipe, and the first end of the air intake pipe is installed on the air intake pipe between the second valve and the desulfurization adsorber.

[0013] Optionally, a diluter is also included, which is arranged on the exhaust pipe and is used to dilute the engine exhaust.

[0014] Optionally, a compressed air device is also included, which is connected to the diluter and can discharge compressed air into the diluter to dilute the engine exhaust.

[0015] Optionally, the compressed air device is connected to the diluter through a second pipeline, and a third valve is provided on the second pipeline.

[0016] Beneficial effects:

[0017] The present invention provides a pretreatment system for testing the emission of black carbon from an engine. The exhaust gas from the engine enters a desulfurization adsorber through an intake pipe, and enters an oxidation catalyst after the sulfide is removed from the exhaust gas from the desulfurization adsorber. After the organic compounds are removed from the exhaust gas from the oxidation catalyst, the black carbon in the exhaust gas from the engine is relatively pure. Finally, the exhaust gas from the engine flows through an exhaust pipe, is collected, and is placed in a testing instrument for testing the concentration of black carbon. The pretreatment system for testing the emission of black carbon from an engine can effectively eliminate the influence of other components on the measurement of the black carbon concentration in the exhaust gas from the engine, thereby making the measurement of the black carbon concentration in the exhaust gas from the engine more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a pretreatment system for engine black carbon emission testing provided by the present invention.

[0019] In the figure:

[0020] 100, reactor; 110, desulfurization adsorber; 120, oxidation catalyst; 130, first high-temperature heating zone;

[0021] 210, air intake pipe; 211, second valve; 220, second high-temperature heating zone;

[0022] 300, air outlet pipe; 310, fourth valve;

[0023] 410, methane storage device; 420, nitrogen storage device; 430, first pipeline; 431, first valve; 510, diluter; 520, compressed air device; 530, second pipeline; 531, third valve. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] Reference Figure 1 As shown, this embodiment provides a pretreatment system for engine black carbon emission testing, including a reactor 100, an intake pipe 210 and an outlet pipe 300, the reactor 100 includes a desulfurization adsorber 110 and an oxidation catalyst 120, the desulfurization adsorber 110 is used to remove sulfides in the engine exhaust, the oxidation catalyst 120 is used to remove organic compounds in the engine exhaust, the intake pipe 210, the desulfurization adsorber 110, the oxidation catalyst 120 and the outlet pipe 300 are connected in sequence.

[0029] The engine exhaust gas enters the desulfurization adsorber 110 through the intake pipe 210, and enters the oxidation catalyst 120 after the sulfide is removed in the desulfurization adsorber 110. After the organic compounds are removed in the oxidation catalyst 120, the black carbon in the engine exhaust gas is relatively pure. Finally, the engine exhaust gas flows through the exhaust pipe 300 and is collected and placed in a testing instrument for black carbon concentration testing. The pretreatment system for engine black carbon emission testing can effectively eliminate the influence of other components on the black carbon concentration measurement in the engine exhaust gas, making the black carbon concentration measurement in the engine exhaust gas more accurate.

[0030] Specifically, a desulfurization agent is provided in the desulfurization adsorber 110, under the action of the desulfurization agent, the sulfide in the engine exhaust reacts with the desulfurization agent, thereby achieving the purpose of removing the sulfide in the engine exhaust. Further, the desulfurization agent can be copper oxide or other desulfurization reaction agents, which will not be described in detail here.

[0031] Specifically, a precious metal oxidation catalyst carrier is installed in the oxidation catalyst 120, and the organic compounds in the engine exhaust are oxidized into carbon dioxide and water, thereby achieving the purpose of removing the organic compounds in the engine exhaust. In addition, in the oxidation catalyst 120, the precious metal oxidation catalyst carrier acts as a catalyst to convert carbon monoxide and hydrocarbons in the engine exhaust into harmless water and carbon dioxide through an oxidation reaction.

[0032] Furthermore, the surface of the reactor 100 is coated with a first high-temperature heating belt 130, and the first high-temperature heating belt 130 is used to heat the desulfurization adsorber 110 and the oxidation catalyst 120. In this embodiment, after the desulfurization adsorber 110 and the oxidation catalyst 120 are heated to the required operating temperature by the first high-temperature heating belt 130, the engine exhaust gas is transported from the intake pipe 210 into the reactor 100 for treatment. Specifically, the operating temperatures of the desulfurization adsorber 110 and the oxidation catalyst 120 are both greater than or equal to 400°C. Preferably, the first high-temperature heating belt 130 heats the desulfurization adsorber 110 and the oxidation catalyst 120 to 400°C, 420°C or 450°C.

[0033] Furthermore, the intake pipe 210 is coated with a second high-temperature heating belt 220, and the second high-temperature heating belt 220 is used to heat the intake pipe 210. In this embodiment, the intake pipe 210 is heated by the second high-temperature heating belt 220 to preheat the engine exhaust gas flowing through the intake pipe 210. When the engine exhaust gas flows into the desulfurization adsorber 110, the engine exhaust gas temperature can be effectively made to quickly reach the reaction temperature for removing sulfides in the engine exhaust gas. Specifically, the second high-temperature heating belt 220 can heat the intake pipe 210 to 100°C-200°C. Preferably, the second high-temperature heating belt 220 heats the intake pipe 210 to 120°C, 150°C, 180°C or 200°C.

[0034] In this embodiment, the pretreatment system for engine black carbon emission test further includes a methane storage device 410, which is connected to the desulfurization adsorber 110, and the methane in the methane storage device 410 is used to reduce the desulfurization agent in the desulfurization adsorber 110. In this embodiment, after the pretreatment system for engine black carbon emission test has processed the engine exhaust, the methane storage device 410 transports methane to the desulfurization adsorber 110, and the desulfurization agent is reduced by the methane for next use.

[0035] Furthermore, the pretreatment system for the engine black carbon emission test also includes a nitrogen storage device 420, which is connected to the desulfurization adsorber 110, and the nitrogen in the nitrogen storage device 420 is used to prevent methane from chemically reacting with other components. In this embodiment, after the pretreatment system for the engine black carbon emission test has processed the engine exhaust, the methane storage device 410 delivers methane to the desulfurization adsorber 110, while the nitrogen storage device 420 delivers nitrogen to the desulfurization adsorber 110 to remove other gas components in the desulfurization adsorber 110. Nitrogen, as a balancing gas, is not easy to chemically react with other substances, thereby effectively preventing methane from chemically reacting with other components, avoiding contamination of the desulfurization adsorber 110, and affecting the next use.

[0036] Further, the methane storage device 410 and the nitrogen storage device 420 are both connected to the desulfurization adsorber 110 through the first pipeline 430, and the first valve 431 is provided on the first pipeline 430. Specifically, the first end of the first pipeline 430 is connected to the desulfurization adsorber 110, and the second end is provided with an interface connected to the methane storage device 410 and an interface connected to the nitrogen storage device 420. In this embodiment, the methane storage device 410 and the nitrogen storage device 420 are both connected to the desulfurization adsorber 110 through the first pipeline 430, so that in the whole process from the transportation of methane to the reduction of the desulfurization agent, the nitrogen protects the methane from the beginning to the end to prevent the chemical reaction of methane with other components. When the pretreatment system for the engine black carbon emission test treats the engine exhaust, the first valve 431 is closed; when the desulfurization agent in the desulfurization adsorber 110 needs to be reduced, the first valve 431 is opened. Further, the first valve 431 can be a solenoid valve or other switch valve, which will not be described in detail here.

[0037] Furthermore, a second valve 211 is provided on the intake pipe 210, the first end of the first pipe 430 is connected to the intake pipe 210, and the first end of the intake pipe 210 is installed on the intake pipe 210 between the second valve 211 and the desulfurization adsorber 110. In this embodiment, when the pretreatment system for the engine black carbon emission test treats the engine exhaust, the second valve 211 is opened; when the desulfurization agent in the desulfurization adsorber 110 needs to be reduced, the second valve 211 is closed. Furthermore, the second valve 211 can be a solenoid valve or other switch valve, which will not be described in detail here.

[0038] In this embodiment, the pretreatment system for the engine black carbon emission test further includes a diluter 510, which is disposed on the outlet pipe 300 and is used to dilute the engine exhaust. In this embodiment, due to different test requirements of the test instrument for black carbon concentration, the engine exhaust treated by the reactor 100 is diluted in the diluter 510 on the outlet pipe 300, so that the treated engine exhaust can be placed in a test instrument with different test concentration requirements for black carbon concentration testing.

[0039] Furthermore, the pretreatment system for the engine black carbon emission test also includes a compressed air device 520, which is connected to the diluter 510, and the compressed air device 520 can deliver compressed air to the diluter 510 to dilute the engine exhaust. Specifically, the air inlet end of the diluter 510 is provided with a compressed air connection port, and the compressed air device 520 is connected to the compressed air connection port. When the engine exhaust gas treated by the reactor 100 flows to the air inlet end of the diluter 510 through the air outlet pipe 300, the compressed air device 520 delivers compressed air to the compressed air connection port, and then the compressed air disperses and dilutes the engine exhaust gas. After the diluted engine exhaust gas is fully mixed with the compressed air in the diluter 510, it is collected at the air outlet pipe 300 on one side of the air outlet end of the diluter 510.

[0040] Specifically, the compressed air device 520 is connected to the diluter 510 through the second pipe 530, and the second pipe 530 is provided with a third valve 531. Specifically, the second pipe 530 is connected to the compressed air connection port. In this embodiment, when the pretreatment system for the engine black carbon emission test processes the engine exhaust gas, the compressed air device 520 works, and the amount of compressed air entering the diluter 510 is controlled by controlling the opening of the third valve 531 to dilute the engine exhaust gas to different concentrations, so that the diluted engine exhaust gas can be placed in a test instrument corresponding to the test concentration requirement to perform a black carbon concentration test.

[0041] Further, when the desulfurizing agent in the desulfurizing adsorber 110 needs to be reduced, the third valve 531 is closed, and the compressed air device 520 does not work. Further, the third valve 531 may be a solenoid valve or other switch valve, which will not be described in detail here.

[0042] Furthermore, a fourth valve 310 is provided on the air outlet pipe 300. Specifically, the fourth valve 310 is provided on the air outlet pipe 300 between the oxidation catalyst 120 and the diluter 510. In the present embodiment, when the pretreatment system for the engine black carbon emission test processes the engine exhaust gas or needs to reduce the desulfurizer in the desulfurization adsorber 110, the fourth valve 310 is opened; when the pretreatment system for the engine black carbon emission test is not working, the second valve 211 and the fourth valve 310 are both closed to prevent outside air from entering the reactor 100. Furthermore, the fourth valve 310 can be a solenoid valve or other switch valve, which will not be described in detail here.

[0043] Exemplarily, when the pretreatment system for engine black carbon emission test treats engine exhaust, the second valve 211 and the fourth valve 310 are opened and the first valve 431 is closed, and the desulfurization adsorber 110 and the oxidation catalyst 120 are heated by the first high-temperature heating belt 130 at the same time, and the intake pipe 210 is heated by the second high-temperature heating belt 220. When the intake pipe 210, the desulfurization adsorber 110 and the oxidation catalyst 120 all reach the required temperature, the engine exhaust is introduced from the intake pipe 210. After the engine exhaust is preheated by the intake pipe 210, it enters the desulfurization adsorber 110. The engine exhaust quickly reaches the reaction temperature for removing sulfides in the engine exhaust in the desulfurization adsorber 110. The engine exhaust is heated by the second high-temperature heating belt 220. After the desulfurization adsorber 110 removes sulfides, it enters the oxidation catalyst 120. After the organic compounds are removed in the oxidation catalyst 120, the engine exhaust gas enters the diluter 510 through the outlet pipe 300. At the air inlet end of the diluter 510, the opening of the third valve 531 is adjusted so that the compressed air device 520 can place an appropriate amount of compressed air into the compressed air connection port of the diluter 510 through the second pipe 530, thereby allowing the compressed air to disperse and dilute the engine exhaust gas. After the engine exhaust gas is fully mixed with the compressed air in the diluter 510, it is collected in the outlet pipe 300 on one side of the outlet end of the diluter 510. The diluted engine exhaust gas is placed in a test instrument corresponding to the test concentration requirement to perform a black carbon concentration test.

[0044] After the pretreatment system for engine black carbon emission testing has processed the engine exhaust, it is necessary to reduce the desulfurizer in the desulfurization adsorber 110, the first valve 431 and the fourth valve 310 are opened, the second valve 211 and the third valve 531 are closed, and the methane storage device 410 transports methane to the desulfurization adsorber 110 through the first pipeline 430, while the nitrogen storage device 420 transports nitrogen to the desulfurization adsorber 110 through the first pipeline 430. After the methane and nitrogen are fully mixed in the first pipeline 430, they enter the desulfurization adsorber 110 to reduce the desulfurizer for next use.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pretreatment system for engine black carbon emission testing, characterized in that: The invention comprises a reactor (100), an air intake pipe (210) and an air outlet pipe (300), wherein the reactor (100) comprises a desulfurization adsorber (110) and an oxidation catalyst (120), wherein the desulfurization adsorber (110) is used to remove sulfides in engine exhaust gas, and the oxidation catalyst (120) is used to remove organic compounds in the engine exhaust gas, and the air intake pipe (210), the desulfurization adsorber (110), the oxidation catalyst (120) and the air outlet pipe (300) are sequentially connected; The surface of the reactor (100) is coated with a first high-temperature heating belt (130), and the first high-temperature heating belt (130) is used to heat the desulfurization adsorber (110) and the oxidation catalyst (120); The air intake pipe (210) is coated with a second high-temperature heating belt (220), and the second high-temperature heating belt (220) is used to heat the air intake pipe (210).

2. The pretreatment system for engine black carbon emission testing according to claim 1, characterized in that: It also includes a methane storage device (410), which is in communication with the desulfurization adsorber (110), and the methane in the methane storage device (410) is used to reduce the desulfurization agent in the desulfurization adsorber (110).

3. The pretreatment system for engine black carbon emission testing according to claim 2, characterized in that: It also includes a nitrogen storage device (420), which is in communication with the desulfurization adsorber (110), and the nitrogen in the nitrogen storage device (420) is used to prevent the methane from chemically reacting with other components.

4. The pretreatment system for engine black carbon emission testing according to claim 3, characterized in that: The methane storage device (410) and the nitrogen storage device (420) are both connected to the desulfurization adsorber (110) via a first pipeline (430), and a first valve (431) is provided on the first pipeline (430).

5. The pretreatment system for engine black carbon emission testing according to claim 4, characterized in that: The air intake pipe (210) is provided with a second valve (211), the first end of the first pipeline (430) is in communication with the air intake pipe (210), and the first end of the air intake pipe (210) is installed on the air intake pipe (210) between the second valve (211) and the desulfurization adsorber (110).

6. The pretreatment system for engine black carbon emission testing according to any one of claims 1 to 5, characterized in that: It also includes a diluter (510), which is arranged on the exhaust pipe (300) and is used to dilute the engine exhaust.

7. The pretreatment system for engine black carbon emission testing according to claim 6, characterized in that: It also includes a compressed air device (520), which is in communication with the diluter (510), and the compressed air device (520) can discharge compressed air into the diluter (510) to dilute the engine exhaust.

8. The pretreatment system for engine black carbon emission testing according to claim 7, characterized in that: The compressed air device (520) is in communication with the diluter (510) via a second pipeline (530), and a third valve (531) is provided on the second pipeline (530).

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