A mine explosion-proof diesel engine tail gas purification device and method

Abstract

The invention discloses a mine explosion-proof diesel engine tail gas purification device and method. The device includes a purification chamber, a metal filter element, a spherical bottom cover, a purification cylinder and legs, and the purification chamber is provided with a particulate matter trapping chamber and a particle collection chamber. The metal baffle of the gas catalytic chamber, one side of the particulate matter trapping chamber is provided with an air inlet, the side of the gas catalytic chamber is provided with an air outlet, the metal filter element is disposed in the particulate matter trapping chamber, the purification cylinder is disposed in the gas catalytic chamber, and the purification chamber There is a high-temperature and high-pressure manhole on the body, which is used to take and place the metal filter element. The main advantages are as follows: 1) The metal filter element has large dirt holding capacity and low resistance; the surface is coated with PTFE coating, which is easy to clean and overcomes the shortcomings of traditional filter elements that are difficult to clean; 2) Utilizes the reducing and oxidizing hazards in the exhaust gas According to the characteristics of the coexistence of substances, transition metal oxide catalysts are prepared to eliminate "harms"; 3) avoiding the use of external reducing agents such as urea and electrical equipment, and simplifying the device structure.

Description

technical field [0001] The invention relates to a tail gas purification device and method, in particular to a mine explosion-proof diesel engine tail gas purification device and method suitable for underground air purification. Background technique [0002] Vehicle exhaust is one of the important sources of air pollution. For this reason, all countries in the world have made strict regulations on the emission of vehicle exhaust. Therefore, how to make motor vehicle exhaust meet the emission standards and reduce the emission of particulate matter and harmful gases is an important research focus. . Ground diesel engine exhaust purification technology is relatively mature, but due to the particularity of the coal mine operating environment, it cannot be directly applied to underground explosion-proof diesel engine exhaust purification. Due to frequent climbing and high-load operation, the amount of carbon black particles emitted by mine diesel engines is much higher than that ...

AI Technical Summary

Problems solved by technology

The traditional diesel engine exhaust gas purification technology uses honeycomb ceramics to purify carbon black particles, which has a small pollution capacity, is easy to block, and the regeneration process is complicated and difficult (high-temperature calcination, high-pressure gas injection), which is not suitable for mine diesel engine exhaust gas purification; coal mine underground electrical equipment needs Strictly comply with coal safety standards, and the SCR system commonly used for NOx purification requires the use of urea metering injection devices, which does not meet the requirements for the use of coal mine electrical equipment, so it is necessary to design a new NOx purification technology that meets coal mine safety standards; the environment of coal mines is complex , the discharge of hazardous substances, especially flammable gases, may lead to safety accidents

The urea additive for vehicles can effectively degrade NOx, but it will cause ammonia (flammable and explosive) leakage

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