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Device for indirect catalytic oxidation of diesel vehicle tail gas pollutants by air micro-nano bubbles

A technology of micro-nano bubbles and catalytic oxidation, which is applied in chemical instruments and methods, separation of dispersed particles, separation methods, etc., can solve the problems of gas volume limitation, etc., and achieve increased gas-liquid mass transfer efficiency, low energy consumption, and improved The effect of throughput

Inactive Publication Date: 2020-04-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device for indirect catalytic oxidation of diesel vehicle exhaust pollutants by air micro-nano bubbles, so as to overcome the defect that the micro-nano-bubble treatment gas is limited by the amount of gas in the prior art

Method used

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  • Device for indirect catalytic oxidation of diesel vehicle tail gas pollutants by air micro-nano bubbles
  • Device for indirect catalytic oxidation of diesel vehicle tail gas pollutants by air micro-nano bubbles
  • Device for indirect catalytic oxidation of diesel vehicle tail gas pollutants by air micro-nano bubbles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment provides a device for indirect catalytic oxidation of various gases in diesel vehicle exhaust by micro-nano bubbles, such as figure 1 As shown, the device includes: an air collection bag 8 and a computer 1 are respectively connected to the micro-nano bubble generator 2, the upper part of the micro-nano bubble generator 2 is connected to the upper part of the reaction tower 5 through a glass tank 3, and the lower part of the micro-nano bubble generator 2 It is connected to the lower part of the reaction tower 5, the top of the reaction tower 5 is connected to the glass tank 3, the glass tank 3 is connected to the flue gas analyzer 4, and the bottom of the reaction tower 5 is connected to the diesel vehicle exhaust gas collection bag 7 through the gas pump 6, wherein the reaction tower The distribution plate 9 is arranged at the bottom of the 5, the connection between the bottom of the micro-nano bubble generator 2 and the bottom of the reaction tower 5 is...

Embodiment 2

[0051] For example, to adjust the salinity factor, use distilled water to prepare absorption solutions with NaCl concentrations of 0.1g / L, 0.3g / L, 0.5g / L, 0.7g / L, and 0.9g / L to explore the system’s response to NO and SO 2 removal efficiency.

[0052] S1: Use diesel engine, collect exhaust gas, measure its NO and SO 2 The concentrations are 200ppm and 300ppm respectively.

[0053] S2: Connect the device in Example 1, use the micro-nano bubble machine, the rated water flow rate of the micro-nano bubble generator is 300mL / min, the rated air intake volume is 50mL / min, and the gas-liquid mixture of air and absorption liquid is 350mL / min. The min micro-nano bubble liquid enters the reaction column from 10cm above the distribution plate 9 below the reaction tower 5, and the reaction column is filled with absorption liquid and circulates with the liquid in the micro-nano bubble instrument, and the tail gas is pumped through the gas pump 6 at an air intake of 1.1L / min. Enter below th...

Embodiment 3

[0057] S1: Urea promotes NO and SO 2 The treatment efficiency increases, and distilled water is used to configure the absorption solution with 2%, 4%, 6%, and 8% concentration of urea.

[0058] S2: Use diesel engine, collect exhaust gas, measure its NO and SO 2 The concentrations are 200ppm and 300ppm respectively.

[0059] S3: Connect the device in Example 1, use the micro-nano bubble generator, the rated water flow rate of the micro-nano bubble generator is 300mL / min, the rated air intake volume is 50mL / min, inject 350mL / min, the air and the absorption liquid generate gas The liquid is mixed into a micro-nano bubble liquid, from the bottom of the reaction tower 5 to 10cm above the distribution plate 9, the reaction column is filled with the absorption liquid and the liquid in the micro-nano bubble instrument circulates, and the tail gas is pumped into the bottom of the distribution plate 9 through the gas pump 6 at 1.1L / min , the generated bubbles are also mixed with the m...

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Abstract

The invention relates to a device for indirect catalytic oxidation of diesel vehicle tail gas pollutants by air micro-nano bubbles. The device comprises: an air collecting bag (8) is connected with amicro-nano bubble generator (2); the upper portion of the micro-nano bubble generator (2) is connected with the upper portion of a reaction tower (5) through a glass tank (3), the lower portion of themicro-nano bubble generator (2) is connected with the lower portion of a reaction tower (5), the top end of the reaction tower (5) is connected with a glass tank (3), and the bottom end of the reaction tower (5) is connected with a diesel vehicle tail gas collecting bag (7). The device is simple in composition, low in energy consumption, easy to operate, capable of improving the gas treatment capacity and more suitable for diesel vehicle tail gas treatment.

Description

technical field [0001] The invention belongs to the field of diesel vehicle exhaust treatment systems, in particular to a device for indirect catalytic oxidation of diesel vehicle exhaust pollutants by air micronano bubbles. Background technique [0002] my country is paying more and more attention to the exhaust pollution of heavy-duty diesel vehicles, and the regulations and standards have become more and more stringent. In July 2019, my country's "Heavy-duty Diesel Vehicle Pollutant Emission Limits and Measurement Methods (China Phase VI)" was issued. It will be implemented in 2021, among which HC, NO X , PM requirements are more stringent. my country's current automobile exhaust control situation is only equivalent to the level of developed countries in the mid-1970s, and my country's exhaust control indicators are 2-6 times higher than that of the United States. The exhaust control situation of heavy-duty diesel vehicles is even more disparate compared with other models...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/94B01D53/60
CPCB01D53/8637B01D53/94
Inventor 李登新马梦蝶王凡郭媛媛吴思成叶志伟段佳男何苑静许威
Owner DONGHUA UNIV
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