CN107542527A - Trapezoidal exhaust gas filter - Google Patents

Abstract

The present invention relates to a kind of trapezoidal exhaust gas filter.It includes Rose Box（1）, the Rose Box（1）Inside it is provided with screen pack（2）And ceramic honeycomb carrier（3）, ceramic honey comb surface is coated with acid-proof coating.A kind of trapezoidal exhaust gas filter of the present invention, acid resistance is good, under screen pack and ceramic honeycomb carrier double-filtration, by the tail gas that main component is CO, HC, NOx, reacts into CO₂、H₂O、N₂And O₂, while the micropore on next door can effectively filter the black smoke particle in waste gas, and black smoke particle can be burned off in the presence of catalyst coat, further increase tail gas clean-up effect.

Description

Trapezoidal exhaust gas filter

Technical field

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

Background technology

At present, common car tail-gas filter, it is using catalyst and NO, NO in vehicle exhaust₂Reacted with CO, it is raw Into CO₂And N₂Both uncontaminated gases, but the automobile of diesel engine is equipped with, due to containing in the tail gas of diesel engine Black smoke particle, existing exhaust gas filter can not effectively filter black smoke particle, can so cause environmental pollution, existing cellular set Body can not be effectively acidproof, causes its service life short, can not meet the needs of client.

The content of the invention

It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of trapezoidal exhaust gas filter, this exhaust gas filter exist Black smoke particle, and black smoke particle meeting at high temperature can be also filtered while filtering CO, HC, NOx pernicious gas in vehicle exhaust Progressively burn and aoxidize, honeycomb substrate can be effectively acidproof.

The object of the present invention is achieved like this：

A kind of trapezoidal exhaust gas filter, including Rose Box, are characterized in：Screen pack and ceramic honeycomb are provided with the Rose Box Carrier, the Rose Box include the first arc-shaped edges, the second arc-shaped edges, the first hypotenuse and the second hypotenuse, first arc-shaped edges, Two hypotenuses, the second arc-shaped edges and the first hypotenuse join end to end successively, and connecting place uses round-corner transition, the ceramic honeycomb carrier edge Axis direction is densely covered with stomata, and one end of the stomata is opening, and the other end is provided with closure face, between the closure face and opening Every arrangement, the two neighboring stomata is provided with next door, is provided with next door in cellular micropore, and catalyst is coated with next door Coating, the honeycomb substrate surface are coated with acid-proof coating, and this acid-proof coating is mainly matched by following raw materials by weight portion and made Into：13 parts of quartz sand, 12 parts of petroleum coke, 9 parts of wood chip, 8 parts of sodium chloride, 1 part of titanium dioxide, 13 parts of ethanol, 30 parts of water；

The preparation method of the acid-proof coating, is comprised the steps of：

（1）Quartz sand, petroleum coke and wood chip are pulverized, powder diameter is 400 mesh；

（2）By step（1）In powder and sodium chloride powder the input high temperature resistance furnace of acquisition, radiant heating, temperature is maintained at 1000 DEG C, 0.5 hour；

（3）Through step（2）Powder after pyrolytic semlting is with titania powder by weight 3:It is added to the water after 1 mixing, while stirring Mix side and add ethanol thereto, microelectronics surface acid-proof coating can be obtained to all dissolvings.

A kind of trapezoidal exhaust gas filter of the present invention, the hole count of its stomata is 600 holes/square inch.

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

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

A kind of trapezoidal exhaust gas filter of the present invention, under screen pack and ceramic honeycomb carrier double-filtration, by main component be CO, HC, NOx tail gas, react into CO₂、H₂O、N₂And O₂, while the micropore on next door can effectively filter the black smoke particle in waste gas, And black smoke particle can be burned off in the presence of catalyst coat, tail gas clean-up effect is further increased；The present invention passes through The method that Raw material processing is sprayed into aqua, one kind, which is prepared, can be sprayed directly on ceramic honey comb surface, form one layer of cause Close, consolidation protective layer.

Brief description of the drawings

Fig. 1 is a kind of structural representation of trapezoidal exhaust gas filter of the present invention.

Fig. 2 is Fig. 1 left view.

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

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

Fig. 5 is the structural representation in the next door of the 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,

Screen pack 2,

Ceramic honeycomb carrier 3,

Stomata 3.1,

Closure 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.

Embodiment

Referring to Fig. 1-5, the present invention relates to a kind of trapezoidal exhaust gas filter, and it includes Rose Box 1, screen pack 2 and ceramic honeybee Nest carrier 3, the left end of Rose Box 1 is inlet exhaust gas 4, and right-hand member is offgas outlet 5, and the screen pack 2 and ceramic honeycomb carrier 3 are set Put in Rose Box 1, for screen pack 2 at inlet exhaust gas 4, the Rose Box 1 includes the first arc-shaped edges 1.1, the second arc-shaped edges 1.2nd, the first hypotenuse 1.3 and the second hypotenuse 1.4, first arc-shaped edges 1.1, the second hypotenuse 1.4, the second arc-shaped edges 1.2 and One hypotenuse 1.3 joins end to end successively, and connecting place uses round-corner transition, and the shape and Rose Box 1 of the ceramic honeycomb carrier 3 are right Should, and ceramic honeycomb carrier 3 is densely covered with stomata 3.1 in the axial direction, one end of the stomata 3.1 is opening 3.6, and the other end is set The closure face of being equipped with 3.2, the closure face 3.2 and the arranged for interval of opening 3.6, the two neighboring stomata 3.1 are provided with next door 3.3, it is provided with next door 3.3 in cellular micropore 3.4, catalyst coat 3.5 is coated with next door 3.3.

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

The ceramic honey comb surface is coated with acid-proof coating, and this acid-proof coating is mainly matched by following raw materials by weight portion It is made：13 parts of quartz sand, 12 parts of petroleum coke, 9 parts of wood chip, 8 parts of sodium chloride, 1 part of titanium dioxide, 13 parts of ethanol, 30 parts of water.

The preparation method of the acid-proof coating, is comprised the steps of：

（1）Quartz sand, petroleum coke and wood chip are pulverized, powder diameter is 400 mesh；

（2）By step（1）In powder and sodium chloride powder the input high temperature resistance furnace of acquisition, radiant heating, temperature is maintained at 1000 DEG C, 0.5 hour；

（3）Through step（2）Powder after pyrolytic semlting is with titania powder by weight 3:It is added to the water after 1 mixing, while stirring Mix side and add ethanol thereto, microelectronics surface acid-proof coating can be obtained to all dissolvings.

Operation principle：The present invention is fabricated to honeycomb ceramic carrier using cordierite, and is built in diesel engine vent gas purification In device, the waste gas inlet exhaust gas 4 with black smoke particle of diesel engine discharge enters, by the by-pass filtration of screen pack 2, so Enter ceramic honeycomb carrier 3 afterwards, enter from the opening 3.6 of stomata 3.1, because stomata 3.1 is opening 3.6 at one end, and another One end is then closure face 3.2, therefore waste gas can be by the next door 3.3 with micropore 3.4, then from the opening of adjacent air holes 3.1 3.6 discharges, because the diameter of black smoke particle is big compared with micropore 3.4, therefore the black smoke particle in waste gas will catch next door by filtering On 3.3, air-flow then passes through from micropore 3.4.

Active rare earth of the catalyst coat 3.5 containing noble metal, Main Ingredients and Appearance have Pt, Pd, Rh, Al₂O₃、Ce、La、 Zr, Cu, Mn, the waste gas of diesel combustion（The predominantly pernicious gas such as CO, HC, NOx）During through micropore 3.4, next door is coated Catalyst coat 3.5 on 3.3 will strengthen CO, HC, NO_xThe activity of three kinds of gas, it is promoted to carry out certain oxidationreduction Reaction is learned, wherein CO is oxidized to colourless nontoxic carbon dioxide at high temperature, and HC compounds resolve into water at high temperature （H₂O）And carbon dioxide, NO_xIt is reduced into nitrogen and oxygen.

When diesel exhaust gas temperature reaches 375 degrees Celsius, in the presence of catalyst coat 3.5, on next door 3.3 Black smoke particle can progressively burn and aoxidize, and the purifying rate of black smoke particle about reaches more than 85%, is taken the photograph when reaction temperature reaches 500 Catalyst and black smoke particle reaction when family name spends are so that completely burned is fallen（Catalysis burning）, now the purifying rate of black smoke particle is reachable More than 90%.

Claims (3)

1. a kind of trapezoidal exhaust gas filter, including Rose Box（1）, it is characterised in that：The Rose Box（1）Inside it is provided with screen pack （2）And ceramic honeycomb carrier（3）, the Rose Box（1）Including the first arc-shaped edges（1.1）, the second arc-shaped edges（1.2）, it is first oblique Side（1.3）With the second hypotenuse（1.4）, first arc-shaped edges（1.1）, the second hypotenuse（1.4）, the second arc-shaped edges（1.2）With One hypotenuse（1.3）Join end to end successively, connecting place uses round-corner transition, the ceramic honeycomb carrier（3）Gather in the axial direction There is stomata（3.1）, the stomata（3.1）One end be opening（3.6）, the other end is provided with closure face（3.2）, the closure face （3.2）And opening（3.6）Arranged for interval, the two neighboring stomata（3.1）It is provided with next door（3.3）, next door（3.3）On be provided with In cellular micropore（3.4）, next door（3.3）It is upper to be coated with catalyst coat（3.5）, the ceramic honey comb surface is coated with resistance to Acid coated, this acid-proof coating is mainly made up of following raw materials by weight portion proportioning：13 parts of quartz sand, 12 parts of petroleum coke, wood chip 9 Part, 8 parts of sodium chloride, 1 part of titanium dioxide, 13 parts of ethanol, 30 parts of water；

The preparation method of the acid-proof coating, is comprised the steps of：

（1）Quartz sand, petroleum coke and wood chip are pulverized, powder diameter is 400 mesh；

（2）By step（1）In powder and sodium chloride powder the input high temperature resistance furnace of acquisition, radiant heating, temperature is maintained at 1000 DEG C, 0.5 hour；

（3）Through step（2）Powder after pyrolytic semlting is with titania powder by weight 3:It is added to the water after 1 mixing, while stirring Mix side and add ethanol thereto, microelectronics surface acid-proof coating can be obtained to all dissolvings.

A kind of 2. trapezoidal exhaust gas filter according to claim 1, it is characterised in that：The stomata（3.1）Hole count be 600 holes/square inch.

A kind of 3. trapezoidal exhaust gas filter according to claim 1 or 2, it is characterised in that：The next door（3.3）Thickness For 0.13 ~ 0.14mm.