Exhaust aftertreatment device for diesel vehicles in underground coal mines based on swirl structure

By adopting a cyclonic structure and a circulating catalytic system in the exhaust after-treatment device for diesel vehicles under coal mines, the problems of difficulty in reducing NOx and PM concentrations in the exhaust gas and the device blockage and secondary pollution are solved, and efficient exhaust purification and long-life use of the device are achieved.

CN116357432BActive Publication Date: 2025-03-25SHANDONG UNIV OF SCI & TECH
2 Cites 0 Cited by

Patent Information

Application Number
CN202310332173.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-31
Publication Date
2025-03-25
Estimated Expiration
2043-03-31

AI Technical Summary

Technical Problem

The concentration of toxic and harmful components such as NOx and PM in the exhaust gas of diesel vehicles underground in coal mines is difficult to reduce, and the exhaust gas purification device is prone to blockage and failure due to the accumulation of particulate matter, and the leakage of toxic gases in the catalytic system leads to secondary pollution.

Method used

The exhaust gas after-treatment device based on the cyclone structure is adopted, including a water tank, particulate matter collector, high-speed rotary exhaust gas separator, exhaust catalyst and circulating NOx selective catalytic reduction system. Through the combination of high-speed rotary separator and catalyst, the effective reduction of NOx and PM is achieved, and the use of NH3 is optimized through the circulating catalytic system to avoid its leakage.

Benefits of technology

The concentration of NOx and PM in the exhaust gas is significantly reduced, the device is prevented from failing due to particulate accumulation, the secondary pollution of toxic gases is reduced, and the exhaust gas purification efficiency and the service life of the device are improved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses an exhaust post-treatment device for diesel vehicles in coal mines based on a cyclone structure, comprising a water tank, a particulate matter trap, an intake pipe, a high-speed rotating exhaust gas separator, an exhaust gas catalyst, a circulating NOx selective catalytic reduction system, and an exhaust pipe; the high-speed rotating exhaust gas separator comprises a Laval pipe, a throat pipe, a cyclone pipe, and a first deposition pipe; the exhaust gas catalyst is provided with a wavy channel and a straight channel; the circulating NOx selective catalytic reduction system comprises an NH3 storage tank, an NH3 recovery tank, and a multi-component mixing pipe, a cyclone reactor, and a second deposition pipe connected in sequence from front to back. The concentration of toxic and harmful components such as NOx and PM in the exhaust gas emitted by diesel vehicles in coal mines is reduced to below the concentration limit, the pipeline blockage caused by the accumulation of particulate matter in the exhaust post-treatment device is avoided, and the secondary pollution caused by NH3 leakage is avoided, so as to achieve the purpose of reducing the exhaust emission of diesel vehicles in coal mines and improving the exhaust purification efficiency.
Need to check novelty before this filing date? Find Prior Art