Ash content self-cleaning wall-flow type spherical DPF

Abstract

The invention provides an ash content self-cleaning wall-flow type spherical DPF (diesel particulate filter). The ash content self-cleaning wall-flow type spherical DPF specifically structurally and mainly comprises a spherical shell, a wall-flow type drum-shaped filter carrier, a spherical-surface-shaped gasket, a steering driving mechanism and a carrier supporting body. Key grooves are formed in the vertical upper surface and the vertical lower surface of the drum-shaped filter carrier, a transmission shaft for driving the drum-shaped filter carrier to reversely rotate by 180 degrees is mounted in the key groove in the upper surface, and the supporting body for supporting most of the weight of the drum-shaped filter carrier is mounted in the key groove in the lower surface. The radial periphery of the drum-shaped filter carrier is a spherical surface, and the spherical gasket is arranged between the drum-shaped filter carrier and the spherical DPF shell and plays a role in buffering and sealing; and the front portion and the rear portion of the drum-shaped filter carrier are each provided with a cavity in the longitudinal direction, and the cavities are connected with an upstream exhaust pipe and a downstream exhaust pipe of the spherical DPF respectively. When ash is deposited to a certain degree, the working back pressure in a clean state can be gradually increased to reach a specific threshold value, and according to a control method, the steering driving mechanism can drive the drum-shaped filter carrier to rotate by 180 degrees, and the spherical DPF shell does not rotate. According to ash self-cleaning, ash is blown out of a filtering hole channel through exhaust airflow of a diesel engine.

Description

technical field [0001] The invention belongs to the field of emission and pollution control of internal combustion power devices, which can reduce the discharge of particulate matter from internal combustion power devices, and can also automatically remove the ash deposited in the trap. [0002] technical background [0003] Diesel engines are widely used in automobiles, engineering machinery, ships, agricultural machinery, and military industry because of their high thermal efficiency and good economy. Composed of organic matter (SOF, Soluble Organic Fractions) and a small amount of ash [1] . Studies have shown that the diameter of most particles emitted by motor vehicles is below 10um [2] . Particulate matter with a particle size below 10 microns is usually called inhalable particulate matter, also known as PM10. Respirable particles can be inhaled by the human body and deposited in the respiratory tract, alveoli and other parts to cause diseases [3] . In addition, di...

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Problems solved by technology

[0013] Aiming at the defect that the current DPF is easily blocked by ash, the present invention proposes an ash self-cleaning wall-flow spherical DPF. When the pores of the spherical DPF wall-flow filter body are blocked, the drum-shaped filter carrier inside the spherical DPF rotates 180 °, the original intake channel is transformed into an exhaust channel, and then the exhaust itself is used to blow back to remove the ash and incompletely burned carbon particles deposited in the drum-shaped filter carrier

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