TWM524746U - Automatic purifying device of engine exhaust gas - Google Patents

Description

Automatic purification device for engine exhaust

The present invention relates to a catalyst conversion device dedicated to an exhaust pipe of an engine, and more particularly to a device capable of effectively purifying exhaust gas discharged from an engine.

The exhaust gas of a typical automobile engine is discharged by an exhaust pipe. After the exhaust gas enters the exhaust pipe, it is treated by a catalytic catalyst (DOC) device and then silenced by a muffler to be discharged into the atmosphere, so that the unpurified exhaust carbon particles (PM) are discharged. hydrocarbon (the HC), carbon monoxide (CO), nitrogen oxides (NO _X) and carbon dioxide and other toxic waste gases CO2, nitrogen oxides (NO _X) and other greenhouse gases to the atmosphere which pollute the atmosphere in addition to the formation of fog In addition to the first-class carcinogenic air pollution and endangering human health, these toxic waste gases will form acid precipitates such as nitrates, sulfates and carbonates after being trapped and trapped by the water vapor evaporated in the atmosphere, causing acidification of the earth soil, which in turn leads to The human food crisis and ocean acidification have led to the death of marine life, the diversion of ocean currents, and the acceleration of extreme climate. Humanity is about to face an unprecedented century catastrophe.

At present, the world's major auto plants continue to develop and improve, from engine efficiency, from EGR (exhaust gas recirculation) or SCR (selective catalytic reduction) and diesel particulate filter (abbreviated to DPF) The method has become the mainstream of automobile exhaust smoke purification. The EU countries have actively set a timetable for reducing the emission reduction of gasoline and diesel vehicles, so that major auto manufacturers can follow it. As early as 2014, they will enter the EU6 stage, but the world is big. The depot also reversed the development of the EU5 phase in 2011 without any breakthroughs, which led to Foss Motors having to use software to deceive the century-old scandal.

The exhaust gas emitted by diesel vehicles contains nitrogen oxides (NOx) which pollute the environment in addition to carbon particles. Therefore, it is known to treat nitrogen oxides by selective catalytic reduction (SCR). The system of the reducer injects urea into the burned exhaust gas via a urea cylinder installed in the automobile to convert the hot exhaust gas into ammonia (Ammonia, NH3), and the ammonia and the nitrogen oxide (NOx) in the catalytic converter produce chemistry. The reduction is converted into nitrogen (Nitrogen) and water that do not affect the natural environment. Since the foregoing exhaust gas exhaust method is such that the exhaust gas passes through the exhaust pipe and the catalytic reducer at a constant speed, the temperature of the exhaust gas cannot be further and more effectively maintained, so that carbon particles, carbon monoxide and hydrocarbons in the discharged toxic exhaust gas cannot be It is completely effectively burned to further reduce environmental pollution.

The purpose of the present invention is to solve the conventional engine purification treatment device, because the exhaust gas passes through the exhaust pipe and the catalytic reducer at a constant speed, so that the temperature of the exhaust gas cannot be further and more effectively maintained, so that the carbon particles and carbon monoxide in the discharged toxic exhaust gas are exhausted. Problems such as the inability to be completely and effectively burned with hydrocarbons.

The automatic purifying device for exhausting exhaust gas of an engine provided by the present invention is characterized in that a necking portion and a flared opening are sequentially arranged in an exhaust pipe from an exhaust gas inlet at one end to an exhaust gas outlet at the opposite end in an axial direction. a plurality of metal catalyst carriers and at least a conventional ceramic filter or a wall flow filter; the exhaust gas enters the exhaust gas inlet and accelerates through the neck portion to maintain the temperature of the exhaust gas, and then the accelerated exhaust gas is diffused through the flared opening Through the metal catalyst carrier and the straight-through ceramic filter element or the wall flow filter element, the discharged toxic exhaust gas such as nitrogen oxides (NOx) collides with the metal catalyst carrier to generate carbon particles, carbon monoxide and carbon in the high heat ignition exhaust gas. Hydrogen compounds, etc., and when passing through a straight-through ceramic filter or a wall-flow filter, the added urea or ammonia is decomposed and reduced to nitrogen and moisture to reduce environmental pollution.

The technical means of this creation include: an exhaust pipe, a plurality of metal catalyst carriers and At least the general-purpose ceramic filter element; wherein the exhaust pipe comprises an exhaust gas inlet and an exhaust gas outlet which are located at two ends in the axial direction and communicate with each other, and the exhaust gas inlet is provided with a necking in the axial direction of the exhaust gas outlet. And a flared enlarged opening, the radial diameter of the necked portion is smaller than a radial diameter of the flared enlarged opening; the plurality of metal catalyst carriers are sequentially arranged axially behind the flared enlarged; The outer diameter of the conventional ceramic filter element is coated with ceramic wool and disposed between the last one of the metal catalyst carrier and the exhaust gas outlet.

Preferably, the present invention is provided with an air inlet hole communicating with the inside and the outside of the exhaust pipe at a side wall of the exhaust pipe corresponding to the position of the neck portion, so that the exhaust gas is accelerated through the neck portion while the exhaust pipe is being exhausted. A negative pressure is generated inside, thereby drawing air into the exhaust pipe through the intake hole to improve combustion efficiency.

Alternatively, the straight-through ceramic filter element provided in the exhaust pipe can be replaced by a wall flow filter.

Preferably, the metal catalyst carriers are disposed in spaced relation to the straight-through ceramic filter element or the wall flow filter element in the exhaust pipe.

Preferably, the present invention is provided with a drain port on the side wall of the exhaust pipe between the straight-through ceramic filter elements, and the drain port is provided with a bolt for closing the drain port.

Preferably, the metal catalyst carrier of the present invention is coated with a platinum and palladium gasification catalyst.

The advantage of this creation is that after the exhaust pipe of the present invention is installed in the vehicle, when the vehicle is running, the exhaust gas enters through the neck portion to accelerate and maintain the temperature of the exhaust gas, and even the air can be sucked through the air inlet. The trachea is mixed with the exhaust gas, and then the accelerated exhaust gas is diffused through the flared opening to pass through the metal catalyst carrier and the straight-through ceramic filter or the wall flow filter to discharge the toxic exhaust gas such as nitrogen oxides (NOx). Colliding with the metal catalyst carrier to generate carbon particles, carbon monoxide and hydrocarbons in the high heat ignition exhaust gas, and when passing through the straight-through ceramic filter element or the wall flow filter element, the added urea or ammonia is decomposed and reduced to nitrogen. With moisture, To reduce pollution to the environment.

1‧‧‧Exhaust pipe

10‧‧‧Air intake

11‧‧‧Exhaust gas inlet

12‧‧‧Exhaust gas export

13‧‧‧neck

14‧‧‧ flared mouth

15‧‧‧Drainage

16‧‧‧Bolts

2‧‧‧Metal catalyst carrier

3‧‧‧through-through ceramic filter

31‧‧‧Ceramic cotton

1 is a schematic cross-sectional view showing a first embodiment of the present invention; a second view showing a first embodiment of the present invention; and a third view showing a plan view showing a second embodiment of the present invention; schematic diagram.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present invention after reading this specification.

As shown in the first and second figures, the first embodiment of the present invention provides an automatic purification device for exhausting exhaust gas of an engine, the first embodiment of which includes an exhaust pipe 1 including both ends in the axial direction and mutual An exhaust gas inlet 11 and an exhaust gas outlet 12 are connected, and the exhaust gas inlet 11 is provided with a necking portion 13 and a flared opening 14 in the axial direction of the exhaust gas outlet 12, and the radial diameter of the neck portion 13 It is smaller than the radial diameter of the flared enlarged opening 14; the side wall of the exhaust pipe 1 corresponding to the position of the necked portion 13 is provided with an intake hole 10 that communicates the inside and the outside of the exhaust pipe 1.

A plurality of metal catalyst carriers 2 and at least a conventional ceramic filter element 3 are disposed in the axial direction of the flared expansion port 14 in the exhaust pipe 1, and the metal catalyst carrier 2 and the straight-through ceramic filter element 3 are The exhaust pipe 1 is disposed at intervals, and the metal catalyst carrier 2 is coated with a platinum and palladium gasification catalyst; the outer diameter of the straight-through ceramic filter element 3 is covered with ceramic wool 31 and disposed at the end of the arrangement. A metal catalyst carrier 2 is interposed between the exhaust gas outlet 12. The straight-through ceramic filter element 3 can also be replaced by a wall-flow filter element (not shown), and the outer diameter of the wall-flow filter element is covered with ceramic wool 31; the ceramic wool 31 can be used for impregnating absorption of urea water or ammonia water.

The present invention can further provide a drain port 15 on the side wall of the exhaust pipe 1 between one of the metal catalyst carrier 2 and the straight-through ceramic filter element 3, and is disposed at the drain port 15 for closing the A bolt 16 of the drain port 15.

After the exhaust pipe of the present invention is installed in the vehicle, when the vehicle enters, the exhaust gas enters from the exhaust gas inlet 11 and accelerates through the neck portion 13 to maintain the temperature of the exhaust gas, and the exhaust gas is accelerated in the neck portion while being in the exhaust pipe 1 A negative pressure is formed to draw air outside the exhaust pipe into the exhaust pipe through the intake hole 10 to mix the exhaust gas, and then the accelerated exhaust gas of the mixed air is diffused through the flared opening 14 to pass through the metal catalyst carrier 2 The straight-through ceramic filter element 3 or the wall-flow type filter element causes the discharged toxic exhaust gas such as nitrogen oxides (NOx) to collide with the metal catalyst carrier 2 to generate carbon particles, carbon monoxide and hydrocarbons in the high heat ignition exhaust gas, and the like. When passing through the straight-through ceramic filter element 3 or the wall-flow type filter element, the added urea or ammonia is decomposed and reduced into nitrogen and moisture, and the generated moisture can be discharged from the drain hole 15 to reduce environmental pollution.

The third figure shows a second embodiment of the automatic purifying device for exhausting the exhaust gas of the present engine, which basically has the same structure as the foregoing first embodiment, the only difference being that the exhaust pipe 1 may not be provided with the aforementioned intake air. Hole 10. Thereby, after the exhaust gas enters from the exhaust gas inlet 11 , the neck portion 13 accelerates and maintains the exhaust gas temperature, and then the accelerated exhaust gas is diffused through the flared opening 14 to pass through the metal catalyst carrier 2 and the straight-through ceramic filter element 3 . Or a wall-flow filter element, such that the discharged toxic exhaust gas such as nitrogen oxides (NOx) collides with the metal catalyst carrier 2 to generate carbon particles, carbon monoxide and hydrocarbons in the high-heat ignition exhaust gas, and passes through the straight-through ceramic filter element. 3 or the wall-flow filter element is added to the urea or ammonia to be decomposed and reduced into nitrogen and water, and the generated moisture can be discharged from the drain hole 15 to reduce environmental pollution.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any limitation on the present creation, so that any modifications or changes to the creation made in the same creative spirit are made. , should still be included in the scope of protection of this creative intent.

1‧‧‧Exhaust pipe

10‧‧‧Air intake

11‧‧‧Exhaust gas inlet

12‧‧‧Exhaust gas export

13‧‧‧neck

14‧‧‧ flared mouth

15‧‧‧Drainage

16‧‧‧Bolts

2‧‧‧Metal catalyst carrier

3‧‧‧through-through ceramic filter

31‧‧‧Ceramic cotton

Claims (5)

An automatic purifying device for exhausting exhaust gas of an engine includes: an exhaust pipe comprising an exhaust gas inlet and an exhaust gas outlet which are located at both ends of the axial direction and communicate with each other, and the exhaust gas inlet is directed to the axial direction of the exhaust gas outlet a neck portion and a flared enlarged opening are formed, the radial diameter of the neck portion is smaller than a radial diameter of the flared enlarged opening; and a plurality of metal catalyst carriers are sequentially arranged axially on the flared opening The rear side; at least the conventional ceramic filter element has an outer diameter covered with ceramic wool and disposed between the last one of the metal catalyst carrier and the exhaust gas outlet. The automatic purifying device for exhausting exhaust gas of an engine according to claim 1, wherein the side wall of the exhaust pipe corresponding to the position of the neck portion is provided with an air inlet hole communicating with the inside and the outside of the exhaust pipe. The automatic purifying apparatus for exhausting exhaust gas of an engine according to claim 1 or 2, wherein the straight-through ceramic filter element can be replaced by a wall-flow type filter element. The automatic purifying apparatus for exhausting exhaust gas of an engine according to claim 3, wherein the metal catalyst carrier and the straight-through ceramic filter or the wall-flow filter are disposed at intervals in the exhaust pipe. An automatic purifying device for exhausting exhaust gas of an engine according to claim 4, wherein a side wall of the exhaust pipe between the straight-through ceramic filter elements is provided with a drain port, and the drain port is provided with a bolt for closing the drain port.