CN104213957A

CN104213957A - Noise-reduction type tail gas filter

Info

Publication number: CN104213957A
Application number: CN201410434026.7A
Authority: CN
Inventors: 华国金
Original assignee: JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
Current assignee: JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority date: 2014-08-29
Filing date: 2014-08-29
Publication date: 2014-12-17

Abstract

The invention relates to a noise-reduction type tail gas filter, which comprises a filter box (1), a fire extinguisher (7) and a sound eliminator (8), wherein an outlet of the sound eliminator (8) is connected with an inlet of the fire extinguisher (7); an outlet of the fire extinguisher (7) is connected with a tail gas inlet (4) of the filter box (1); a filter screen (2) and a ceramic honeycomb carrier (3) are arranged in the filter box (1). According to the noise-reduction type tail gas filter, under the functions of the sound eliminator and the fire extinguisher, noise reduction and fire extinguishment can be carried out; the tail gas with main components of CO, HC, NOx is reacted to generate CO2, H2O, N2 and O2 through two-stage filtration of the filter screen and the ceramic honeycomb carrier; meanwhile, micropores in a partitioned wall can effectively filter out black smoke particles in exhaust gas, and the black smoke particles can be burned under the effect of a catalyst coating, so that the tail gas purifying effect is further improved.

Description

Noise-reducing type exhaust gas filter

Technical field

The present invention relates to a kind of noise-reducing type exhaust gas filter, for purifying vehicle exhaust.Belong to automobile equipment technical field.

Background technique

At present, common automobile exhaust filter uses NO, the NO in catalyzer and vehicle exhaust ₂react with CO, generate CO ₂and N ₂these two kinds of uncontaminated gases, but the automobile being equipped with diesel engine, owing to containing black smoke particle in the tail gas of diesel engine, existing exhaust gas filter can not effectively filter black smoke particle, can cause environmental pollution like this.

Summary of the invention

The object of the invention is to overcome above-mentioned deficiency; provide a kind of noise-reducing type exhaust gas filter; this exhaust gas filter energy noise reduction and fire extinguishing, also can filter black smoke particle, and at high temperature black smoke particle can progressively burn and be oxidized while filtering CO, HC, NOx harmful gas in vehicle exhaust.

The object of the present invention is achieved like this:

A kind of noise-reducing type exhaust gas filter, comprise Rose Box, be characterized in: described noise-reducing type exhaust gas filter also comprises fire extinguisher and silencing apparatus, the outlet of described silencing apparatus is connected with the import of fire extinguisher, the outlet of fire extinguisher is connected with the inlet exhaust gas of Rose Box, filter screen and ceramic honeycomb carrier is provided with in described Rose Box, described Rose Box comprises the first arc-shaped edges, second arc-shaped edges, first hypotenuse and the second hypotenuse, described first arc-shaped edges, second hypotenuse, second arc-shaped edges and the first hypotenuse join end to end successively, connecting place adopts round-corner transition, described ceramic honeycomb carrier is densely covered with pore in the axial direction, one end of described pore is opening, the other end is provided with shutoff face, described shutoff face and open space are arranged, described adjacent two pores are provided with next door, next door have in cellular micropore, next door is coated with catalyst coat.

A kind of noise-reducing type exhaust gas filter of the present invention, the hole count of its pore is 600 holes/square inch.

A kind of noise-reducing type exhaust gas filter of the present invention, the thickness in its next door is 0.13 ~ 0.14mm.

A kind of noise-reducing type exhaust gas filter of the present invention, its filter screen adopts sub-glass fibre membrane material to make.

Compared with prior art, the invention has the beneficial effects as follows:

A kind of noise-reducing type exhaust gas filter of the present invention, first under the effect of silencing apparatus and fire extinguisher, carries out noise reduction and fire extinguishing, under filter screen and ceramic honeycomb carrier double-filtration, is the tail gas of CO, HC, NOx, is reacted into CO by main component ₂, H ₂o, N ₂and O ₂, the micropore simultaneously on next door can black smoke particle effectively in filtering exhaust, and under the effect of catalyst coat black smoke particle can burned fall, further increase tail gas clean-up effect.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of noise-reducing type exhaust gas filter of the present invention.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the schematic cross-section of ceramic honeycomb carrier of the present invention.

Fig. 4 is the partial axial section figure of ceramic honeycomb carrier of the present invention.

Fig. 5 is the structural representation in the next door of ceramic honeycomb carrier of the present invention.

In figure:

Rose Box 1,

First arc-shaped edges 1.1,

Second arc-shaped edges 1.2,

First hypotenuse 1.3,

Second hypotenuse 1.4,

Filter screen 2,

Ceramic honeycomb carrier 3,

Pore 3.1,

Shutoff face 3.2,

Next door 3.3,

Micropore 3.4,

Catalyst coat 3.5

Opening 3.6,

Inlet exhaust gas 4,

Offgas outlet 5,

Tail gas 6,

Fire extinguisher 7,

Silencing apparatus 8.

Embodiment

See Fig. 1-5, the present invention relates to a kind of noise-reducing type exhaust gas filter, it comprises Rose Box 1, filter screen 2, ceramic honeycomb carrier 3, fire extinguisher 7 and silencing apparatus 8, the left end of Rose Box 1 is inlet exhaust gas 4, right-hand member is offgas outlet 5, the outlet of described silencing apparatus 8 is connected with the import of fire extinguisher 7, and the outlet of fire extinguisher 7 is connected with the inlet exhaust gas 4 of Rose Box 1.

Described filter screen 2 and ceramic honeycomb carrier 3 are arranged in Rose Box 1, filter screen 2 is near inlet exhaust gas 4 place, described Rose Box 1 comprises the first arc-shaped edges 1.1, second arc-shaped edges 1.2, first hypotenuse 1.3 and the second hypotenuse 1.4, described first arc-shaped edges 1.1, second hypotenuse 1.4, second arc-shaped edges 1.2 and the first hypotenuse 1.3 join end to end successively, connecting place adopts round-corner transition, the shape of described ceramic honeycomb carrier 3 is corresponding with Rose Box 1, and ceramic honeycomb carrier 3 is densely covered with pore 3.1 in the axial direction, one end of described pore 3.1 is opening 3.6, the other end is provided with shutoff face 3.2, described shutoff face 3.2 and opening 3.6 interval are arranged, described adjacent two pores 3.1 are provided with next door 3.3, next door 3.3 have in cellular micropore 3.4, next door 3.3 is coated with catalyst coat 3.5.

Wherein, the hole count of pore 3.1 is 600 holes/square inch, and the thickness in next door 3.3 is 0.13 ~ 0.14mm.

Described filter screen 2 adopts sub-glass fibre membrane material to make.

Working principle: the present invention adopts cordierite to be made into honeycomb ceramic carrier, and be built in exhaust purifier of diesel engine, the tail gas of the waste gas tail gas motor with black smoke particle that diesel engine is discharged is through silencing apparatus 8 noise reduction, then fire extinguisher 7 is entered, air-flow expands wherein, rotate, moisture in evaporation tail gas, Mars can be eliminated simultaneously, further reduction engine noise pollutes, harmful components in moisture are filtered in follow-up filter screen 2 and ceramic honeycomb carrier 3, the tail gas of discharging from fire extinguisher 7 enters from inlet exhaust gas 4, through the single filter of filter screen 2, then ceramic honeycomb carrier 3 is entered, enter from the opening 3.6 of pore 3.1, because pore 3.1 is at one end opening 3.6, then shutoff face 3.2 at the other end, therefore waste gas can by the next door 3.3 with micropore 3.4, then discharge from the opening 3.6 of adjacent air holes 3.1, due to the diameter of black smoke particle, comparatively micropore 3.4 is large, therefore the black smoke particle in waste gas will be filtered and catch on next door 3.3, air-flow then passes from micropore 3.4.

The active rare earth of described catalyst coat 3.5 containing precious metal, Main Ingredients and Appearance has Pt, Pd, Rh, Al ₂o ₃, Ce, La, Zr, Cu, Mn, when the waste gas (being mainly the harmful gases such as CO, HC, NOx) of diesel combustion is through micropore 3.4, the catalyst coat 3.5 be coated on next door 3.3 will strengthen CO, HC, NO _xthe activity of three kinds of gases, impel it to carry out certain oxidationreduction chemical reaction, wherein CO is at high temperature oxidized to colourless nontoxic carbon dioxide, and HC compound at high temperature resolves into water (H ₂o) and carbon dioxide, NO _xbe reduced into nitrogen and oxygen.

When diesel exhaust gas temperature reaches 375 degrees Celsius; under the effect of catalyst coat 3.5; black smoke particle on next door 3.3 can progressively burn and be oxidized; the purification ratio of black smoke particle about reaches more than 85%; catalyzer and black smoke particle reaction when reaction temperature reaches 500 degrees Celsius thus perfect combustion are fallen (catalytic combustion), and now the purification ratio of black smoke particle can reach more than 90%.

Claims

1. a noise-reducing type exhaust gas filter, comprise Rose Box (1), it is characterized in that: described noise-reducing type exhaust gas filter also comprises fire extinguisher (7) and silencing apparatus (8), the outlet of described silencing apparatus (8) is connected with the import of fire extinguisher (7), the outlet of fire extinguisher (7) is connected with the inlet exhaust gas (4) of Rose Box (1), filter screen (2) and ceramic honeycomb carrier (3) is disposed with in described Rose Box (1), described Rose Box (1) comprises the first arc-shaped edges (1.1), second arc-shaped edges (1.2), first hypotenuse (1.3) and the second hypotenuse (1.4), described first arc-shaped edges (1.1), second hypotenuse (1.4), second arc-shaped edges (1.2) and the first hypotenuse (1.3) join end to end successively, connecting place adopts round-corner transition, described ceramic honeycomb carrier (3) is densely covered with pore (3.1) in the axial direction, one end of described pore (3.1) is opening (3.6), the other end is provided with shutoff face (3.2), described shutoff face (3.2) and opening (3.6) interval are arranged, described adjacent two pores (3.1) are provided with next door (3.3), next door (3.3) has in cellular micropore (3.4), next door (3.3) is coated with catalyst coat (3.5).

2. a kind of noise-reducing type exhaust gas filter according to claim 1, is characterized in that: the hole count of described pore (3.1) is 600 holes/square inch.

3. a kind of noise-reducing type exhaust gas filter according to claim 1 and 2, is characterized in that: the thickness of described next door (3.3) is 0.13 ~ 0.14mm.

4. a kind of noise-reducing type exhaust gas filter according to claim 1, is characterized in that: described filter screen (2) adopts sub-glass fibre membrane material to make.