Power battery and processing system of combustion flue gas of electric vehicle

Abstract

The utility model discloses a kind of power battery and electric whole car combustion flue gas processing system of operation temperature suitable, energy consumption is low, tail gas clean, comprising: first heat exchange equipment, for heat exchange to air, combustion flue gas or mixture of two with hot oil medium, output first gas and cold oil medium;Heating equipment;Dust removal equipment;De-nitration equipment, for the de-nitration treatment of third gas, output fourth gas;Second heat exchange equipment, for the heat exchange treatment of fourth gas and cold oil medium, output fifth gas and hot oil medium;Deacidification equipment, for the deacidification treatment of fifth gas, output sixth gas;Wherein, the first heat exchange equipment and second heat exchange equipment are communicated by hot oil medium delivery pipeline and cold oil medium delivery pipeline;Flow sensor is equipped on combustion flue gas delivery pipeline, and first control valve is equipped on air delivery pipeline according to the value of flow sensor to adjust opening degree.

Description

Technical Field

[0001] This utility model relates to the technical field of combustion testing of power batteries and electric vehicles, and more specifically, to a system for treating combustion flue gas from power batteries and electric vehicles. Background Technology

[0002] Combustion tests on power batteries and electric vehicles under different conditions aim to deeply study their combustion characteristics and chemical reaction mechanisms. These tests not only provide crucial data support for battery design but also play a significant role in improving battery safety performance. However, during the tests, the combustibles in the power batteries and electric vehicles burn rapidly, producing high-temperature, high-concentration combustion fumes. In addition to particulate matter and dust, these fumes contain flammable, explosive, highly corrosive, and toxic components such as CO, H2, HF, PF5, C6H5F, C5H9NO, and non-methane hydrocarbons (NMHC). These combustion fumes not only seriously endanger the health of operators but also potentially cause severe pollution to the laboratory and surrounding environment. Therefore, it is essential to effectively purify the combustion fumes generated during the tests to ensure that the emitted exhaust gases meet environmental standards.

[0003] The existing main equipment and process for flue gas purification are: high-temperature dust collector → cyclone hybrid cyclone tower → water mist separator → VOCs treatment module → exhaust fan → chimney for compliant emissions. However, this flue gas purification system still has the following problems:

[0004] (1) The system operates at temperatures below the flue gas dew point (VOCs gas boiling point is between 50 and 250°C), causing some acids and hydrocarbons to precipitate, which in turn corrodes the filter cartridges, equipment and pipelines, causing blockage problems, resulting in system instability, shortening service life, and increasing engineering investment and system maintenance costs.

[0005] (2) The system has insufficient heat recovery, resulting in a large amount of energy waste.

[0006] (3) The system has not effectively treated nitrogen oxides and acidic components, which may lead to excessive emissions of exhaust pollutants. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a power battery and electric vehicle combustion flue gas treatment system with adjustable operating temperature, low energy consumption, and clean exhaust gas. The technical solution is as follows:

[0008] The system for treating combustion exhaust gases from power batteries and electric vehicles includes:

[0009] The first heat exchange device is used to exchange heat between air, combustion flue gas, or a mixture of the two and hot oil medium, and output a first gas and cold oil medium.

[0010] A heating device is used to heat the first gas and output the second gas;

[0011] Dust removal equipment is used to remove dust from the second gas and output the third gas;

[0012] Denitrification equipment is used to denitrify a third gas and output a fourth gas;

[0013] The second heat exchanger is used to exchange heat between the fourth gas and the cold oil medium, and outputs the fifth gas and the hot oil medium.

[0014] Acid removal equipment is used to remove acid from the fifth gas and output the sixth gas;

[0015] The first heat exchanger and the second heat exchanger are connected by a hot oil medium transport pipeline and a cold oil medium transport pipeline.

[0016] A flow sensor is installed on the combustion flue gas delivery pipeline, and a first control valve is installed on the air delivery pipeline to adjust the opening degree according to the value of the flow sensor.

[0017] The advantages of the treatment system of this utility model are: (1) By the layout and cooperation of the first heat exchanger, the heating equipment and the second heat exchanger, the system can operate at a temperature higher than the flue gas dew point with low energy consumption and the operating temperature field is stable, which can significantly improve the stability and life of the system. (2) By treating the flue gas with dust removal equipment, denitrification equipment and deacidification equipment, the exhaust gas meets the emission index requirements at all times. (3) By placing the dust removal equipment and denitrification equipment before the second heat exchanger, the dust removal and denitrification can operate at a higher temperature, thereby improving the dust removal and denitrification effect; by placing the deacidification equipment after the second heat exchanger, heat can be recovered and the deacidification effect can be improved. (4) The opening and closing degree of the first control valve changes according to the real-time data of the flow sensor, thereby adjusting the air inflow: when the system is started, only air is introduced to fully preheat the system; during normal operation, the amount of combustion flue gas increases until it stabilizes, and the introduction of air is gradually stopped; as the amount of combustion flue gas decreases, air is gradually introduced again until the combustion is completed and maintained for a period of time to ensure that the system is completely replaced.

[0018] As a further improvement to the aforementioned power battery and electric vehicle combustion gas treatment system: a temperature sensor is installed on the first gas delivery pipe, and a second control valve is installed on the combustion gas delivery pipe to adjust its opening degree based on the temperature sensor reading. This ensures that combustion gas is only introduced when the system temperature reaches the required range.

[0019] As a further improvement to the aforementioned power battery and electric vehicle combustion flue gas treatment system, the heating device is an electric heater.

[0020] As a further improvement to the aforementioned power battery and electric vehicle combustion flue gas treatment system: the dust removal equipment and denitrification equipment are integrated dust and denitrification dust collectors.

[0021] Further improvements to the aforementioned power battery and electric vehicle combustion exhaust treatment system also include:

[0022] VOCs gas concentration equipment is used to enrich VOCs gas in the sixth gas and output concentrated VOCs gas and qualified tail gas.

[0023] Catalytic combustion equipment is used to treat concentrated VOCs gas by catalytic combustion and output exhaust gas that meets the standards.

[0024] Chimneys are used to emit exhaust gases that meet emission standards.

[0025] Therefore, enriching VOCs gas before catalytic combustion can significantly reduce the energy consumption of catalytic combustion equipment.

[0026] As a further improvement to the aforementioned treatment system for combustion exhaust gases from power batteries and electric vehicles, the VOCs gas concentration equipment employs an activated carbon adsorption-desorption device to adsorb and desorb VOCs from a gas-liquid mixture. Therefore, after the activated carbon becomes saturated, a hot gas flow can be used to desorb high concentrations of VOCs from the activated carbon, resulting in low cost and good separation efficiency.

[0027] As a further improvement to the aforementioned treatment system for combustion flue gas from power batteries and electric vehicles: the deacidification equipment is a spray tower.

[0028] As a further improvement to the aforementioned treatment system for combustion exhaust gases from power batteries and electric vehicles, a condensation device is also included, located between the acid removal equipment and the VOCs gas concentration equipment. This removes water mist carried over from the wet acid removal process, thereby improving the VOCs gas removal efficiency.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention 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 present invention. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to aid in understanding this utility model. The content provided in the drawings and the related descriptions in this utility model can be used to explain this utility model, but do not constitute an undue limitation of this utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of an embodiment of the power battery and electric vehicle combustion flue gas treatment system of this utility model.

[0032] The relevant markings in the above figures are:

[0033] 110 - First heat exchanger, 120 - Second heat exchanger, 130 - Hot oil medium conveying pipeline, 140 - Cold oil medium conveying pipeline connection, 200 - Heating equipment, 300 - Dust collector (integrated dust and nitrate collector), 400 - Deacidification equipment, 510 - VOCs gas concentration equipment, 511 - VOCs concentrated gas outlet, 512 - Clean gas outlet, 520 - Catalytic combustion equipment, 600 - Chimney, 700 - Condensation equipment, 810 - T-junction pipe, 820 - Flow sensor, 830 - First control valve, 840 - Temperature sensor, 850 - Second control valve. Detailed Implementation

[0034] The present invention will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0035] The technical solutions and features provided in the various parts of this utility model, including the following description, can be combined with each other without conflict.

[0036] Furthermore, the embodiments of the present invention described below are generally only a part of the embodiments of the present invention, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the protection scope of the present invention.

[0037] Regarding the terminology and units used in this utility model: The terms "comprising," "having," and any variations thereof in the specification, claims, and related parts of this utility model are intended to cover non-exclusive inclusion.

[0038] Figure 1 This is a schematic diagram of an embodiment of the power battery and electric vehicle combustion flue gas treatment system of this utility model.

[0039] like Figure 1 The power battery and electric vehicle combustion flue gas treatment system shown includes a first heat exchanger 110, a heating device 200, a dust removal device, a denitrification device, a second heat exchanger 120, a deacidification device 400, a condensation device 700, a VOCs gas concentration device 510, a catalytic combustion device 520, and a chimney 600.

[0040] The first heat exchanger 110 is used to exchange heat between air, combustion flue gas, or a mixture of both and a hot oil medium, outputting a first gas and a cold oil medium. The air inlet, combustion flue gas delivery pipe, and air delivery pipe of the first heat exchanger 110 are connected by a T-junction pipe 810. A flow sensor 820 is installed on the combustion flue gas delivery pipe, and a first control valve 830 is installed on the air delivery pipe to adjust its opening degree based on the value of the flow sensor 820. A temperature sensor 840 is installed on the first gas delivery pipe, and a second control valve 850 is installed on the combustion flue gas delivery pipe to adjust its opening degree based on the value of the temperature sensor 840.

[0041] The heating device 200 is used to heat the first gas and output the second gas; the heating device 200 is an electric heater; the gas inlet of the heating device 200 is connected to the first gas outlet of the first heat exchange device 110.

[0042] The dust removal equipment is used to remove dust from the second gas and output the third gas; the denitrification equipment is used to denitrify the third gas and output the fourth gas; the dust removal equipment and the denitrification equipment are an integrated dust and denitrification dust collector 300, whose air inlet is connected to the second gas outlet of the heating equipment 200.

[0043] The second heat exchanger 120 is used to perform heat exchange treatment on the fourth gas and the cold oil medium, and outputs the fifth gas and the hot oil medium; the first heat exchanger 110 and the second heat exchanger 120 are connected to each other through the hot oil medium conveying pipeline 130 and the cold oil medium conveying pipeline 140; the air inlet of the second heat exchanger 120 is connected to the fourth gas outlet of the dust collector 300.

[0044] The deacidification device 400 is used to deacidify the fifth gas and output the sixth gas; the deacidification device 400 is a spray tower, and its inlet is connected to the fifth gas outlet of the second heat exchange device 120.

[0045] The condensing device 700 is used to remove water vapor carried by the sixth gas; the condensing device 700 is located between the deacidification device 400 and the VOCs gas concentration device 510, the inlet of the condensing device 700 is connected to the outlet of the sixth gas of the deacidification device 400, and the outlet is connected to the inlet of the VOCs gas concentration device 510.

[0046] The VOCs gas concentration device 510 is used to enrich VOCs gas in the sixth gas and output concentrated VOCs gas and qualified tail gas; the VOCs gas concentration device 510 adopts an activated carbon adsorption and desorption device for adsorption and desorption treatment of VOCs in gas-liquid mixture.

[0047] The catalytic combustion device 520 is used to perform catalytic combustion treatment on VOCs concentrated gas and output qualified exhaust gas; the inlet of the catalytic combustion device 520 is connected to the VOCs concentrated gas outlet 511 of the VOCs gas concentration device 510.

[0048] The chimney 600 is used to emit exhaust gas that meets the standards. The air inlet of the chimney 600 is connected to the air outlet of the catalytic combustion device 520 and the clean gas outlet 512 of the VOCs gas concentration device 510.

[0049] The foregoing has described the relevant content of this utility model. Those skilled in the art will be able to implement this utility model based on these descriptions. All other embodiments obtained by those skilled in the art based on the above description of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A system for treating combustion exhaust gases from power batteries and electric vehicles, characterized in that: include: The first heat exchange device (110) is used to exchange heat between air, combustion flue gas or a mixture of the two and hot oil medium, and output a first gas and cold oil medium. Heating equipment (200) is used to heat the first gas and output the second gas; Dust removal equipment is used to remove dust from the second gas and output the third gas; Denitrification equipment is used to denitrify a third gas and output a fourth gas; The second heat exchange device (120) is used to perform heat exchange treatment on the fourth gas and cold oil medium, and output the fifth gas and hot oil medium. Acid removal equipment (400) is used to remove acid from the fifth gas and output the sixth gas; The first heat exchanger (110) and the second heat exchanger (120) are connected (140) through a hot oil medium conveying pipeline (130) and a cold oil medium conveying pipeline; A flow sensor (820) is provided on the combustion flue gas delivery pipe, and a first control valve (830) is provided on the air delivery pipe to adjust the opening degree according to the value of the flow sensor (820).

2. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 1, characterized in that: A temperature sensor (840) is provided on the first gas delivery pipeline, and a second control valve (850) is provided on the combustion flue gas delivery pipeline to adjust the opening degree according to the value of the temperature sensor (840).

3. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 1, characterized in that: The heating device (200) is an electric heater.

4. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 1, characterized in that: The dust removal equipment and denitrification equipment are an integrated dust and denitrification dust collector (300).

5. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 1, characterized in that: Also includes: VOCs gas concentration equipment (510) is used to enrich VOCs gas in the sixth gas and output VOCs concentrated gas and qualified tail gas. Catalytic combustion equipment (520) is used to treat VOCs concentrated gas by catalytic combustion and output compliant exhaust gas; Chimney (600) is used to emit exhaust gas that meets emission standards.

6. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 5, characterized in that: The VOCs gas concentration equipment (510) uses an activated carbon adsorption-desorption device to adsorb and desorb VOCs in a gas-liquid mixture.

7. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 6, characterized in that: The deacidification equipment (400) is a spray tower.

8. The system for treating combustion exhaust gas from power batteries and electric vehicles as described in claim 7, characterized in that: It also includes a condensation and demisting device (700) located between the deacidification device (400) and the VOCs gas concentration device (510).

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