CN104234790A - Exhaust purifier - Google Patents
Exhaust purifier Download PDFInfo
- Publication number
- CN104234790A CN104234790A CN201410444707.1A CN201410444707A CN104234790A CN 104234790 A CN104234790 A CN 104234790A CN 201410444707 A CN201410444707 A CN 201410444707A CN 104234790 A CN104234790 A CN 104234790A
- Authority
- CN
- China
- Prior art keywords
- ceramic honeycomb
- honeycomb carrier
- exhaust
- next door
- exhaust purifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to an exhaust purifier. The exhaust purifier comprises a filter tank (1); a filter net (2), a ceramic honeycomb carrier (3) and a low temperature catalysis area are sequentially arranged in the filter tank (1) along the airflow direction; the left end of the filter tank (1) is provided with a gas supplementing device (8), and the right end of the filter tank (1) is provided with a drain hole (9). According to the exhaust purifier, exhaust which comprises main components of CO, HC and NOx is reacted into CO2, H2O, N2 and O2 under three levels of filtration of the filter net, the ceramic honeycomb carrier and the low temperature catalysis area; meanwhile, micropores in a partition can effectively filter soot particles in the exhaust, and the soot particles can be burned up under the function of a catalyst coating, so that the ceramic honeycomb carrier has a regenerative function and can continue filtering and purifying the soot particles, and the exhaust of a diesel engine cannot pollute environment.
Description
Technical field
The present invention relates to a kind of exhaust purifier, for purifying vehicle exhaust.Belong to automobile equipment technical field.
Background technique
At present, common automobile exhaust purifier 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 carbon soot particles in the tail gas of diesel engine, existing exhaust purifier effectively can not filter carbon soot particles, can cause environmental pollution like this; Existing purifier catalytic efficiency is low simultaneously, and tail gas clean-up is incomplete.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of exhaust purifier, this exhaust purifier CO, HC, NO in high efficiency filter vehicle exhaust
xalso can filter carbon soot particles while harmful gas, and at high temperature carbon soot particles can progressively burn and be oxidized, make ceramic honeycomb carrier have regeneration function.
The object of the present invention is achieved like this:
A kind of exhaust purifier, comprise Rose Box, be characterized in: in described Rose Box, be disposed with filter screen along airflow direction, ceramic honeycomb carrier and low-temperature catalyzed district, the left end of described Rose Box is provided with making-up air device, right-hand member has weep hole, described making-up air device is one-way valve, 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, described ceramic honeycomb carrier is corresponding with the inwall of Rose Box.
A kind of exhaust purifier of the present invention, the hole count of its pore is 600 holes/square inch.
A kind of exhaust purifier of the present invention, the thickness in its next door is 0.13 ~ 0.14mm.
Compared with prior art, the invention has the beneficial effects as follows:
Main component, under filter screen, ceramic honeycomb carrier and low-temperature catalyzed district three-stage filtration, is CO, HC, NO by a kind of exhaust purifier of the present invention
xtail gas, be reacted into CO
2, H
2o, N
2and O
2micropore simultaneously on next door can carbon soot particles effectively in filtering exhaust; and under the effect of catalyst coat carbon soot particles can burned fall; ceramic honeycomb carrier is made to have regeneration function; filtration and the purification of carbon soot particles can be proceeded, ensure that the diesel motor exhaust of discharge does not pollute the environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of exhaust purifier of the present invention.
Fig. 2 is the schematic cross-section of ceramic honeycomb carrier of the present invention.
Fig. 3 is the partial axial section figure of ceramic honeycomb carrier of the present invention.
Fig. 4 is the structural representation in the next door of ceramic honeycomb carrier of the present invention.
In figure:
Rose Box 1,
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,
Low-temperature catalyzed district 7,
Making-up air device 8,
Weep hole 9.
Embodiment
See Fig. 1-4, the present invention relates to a kind of exhaust purifier, it comprises Rose Box 1, filter screen 2, ceramic honeycomb carrier 3 and low-temperature catalyzed district 7, Rose Box 1 two ends are thin segment, middle part is thick section, the left end of Rose Box 1 is inlet exhaust gas 4, right-hand member is offgas outlet 5, described filter screen 2, ceramic honeycomb carrier 3 and low-temperature catalyzed district 7 are arranged in Rose Box 1, filter screen 2 and ceramic honeycomb carrier 3 are near inlet exhaust gas 4 place, low-temperature catalyzed district 7 is arranged on the thick section of Rose Box 1, low temperature catalyst is filled in low-temperature catalyzed district 7, described Rose Box 1 is in tubular shape, described ceramic honeycomb carrier 3 is corresponding with the inwall of 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.
The left end of described Rose Box 1 is provided with making-up air device 8, right-hand member has weep hole 9, making-up air device 8 is one-way valve, without the need to other any power plant, namely the conducting of one-way valve relies on the pressure difference of air inlet and air outlet slit with closing completely, when cylinder exhaust stroke completes and starts suction stroke, air pressure in cylinder is less than barometric pressure, extraneous air is made to enter inlet exhaust gas 4 by one-way valve, and successively by filter screen 2 together with tail gas, ceramic honeycomb carrier 3 and low-temperature catalyzed district 7, the gas produced through catalytic reaction is discharged finally by offgas outlet 5, the water that reaction produces is discharged through weep hole 9.
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.
Working principle: the waste gas with carbon soot particles that diesel engine is discharged enters filter screen 2 through inlet exhaust gas 4 and carries out single filter to nonreactive impurity, then enter ceramic honeycomb carrier 3 and carry out cascade filtration, tail gas enters 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 carbon soot particles, comparatively micropore 3.4 is large, therefore the carbon soot particles in waste gas will be filtered and catch on next door 3.3, air-flow then passes from micropore 3.4, enter low-temperature catalyzed district 7 from the waste gas of ceramic honeycomb carrier 3 discharge and carry out three-stage filtration, the harmful gas that further purification is residual.
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; carbon soot particles on next door 3.3 can progressively burn and be oxidized; the purification ratio of carbon soot particles about reaches more than 85%; catalyzer and carbon soot particles reaction when reaction temperature reaches 500 degrees Celsius thus perfect combustion are fallen (catalytic combustion), and now the purification ratio of carbon soot particles can reach more than 90%.
First filter screen 2 will not participate in the partial impurities of reaction through collecting in tail gas, then ceramic nest carrier 3 is entered, because ceramic honeycomb carrier 3 is near motor, higher delivery temperature can be obtained, it is mainly used in the carbon soot particles caught on next door 3.3 to burn, ceramic honeycomb carrier 3 does not purify tail gas completely and purifies further through low-temperature catalyzed district 7, only need regularly replace filter screen 5 at ordinary times.
Claims (3)
1. an exhaust purifier, comprise Rose Box (1), it is characterized in that: in described Rose Box (1), be disposed with filter screen (2) along airflow direction, ceramic honeycomb carrier (3) and low-temperature catalyzed district (7), the left end of described Rose Box (1) is provided with making-up air device (8), right-hand member has weep hole (9), described making-up air device (8) is one-way valve, 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), described ceramic honeycomb carrier (3) is corresponding with the inwall of Rose Box (1).
2. a kind of exhaust purifier 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 exhaust purifier according to claim 1 and 2, is characterized in that: the thickness of described next door (3.3) is 0.13 ~ 0.14mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410444707.1A CN104234790A (en) | 2014-09-03 | 2014-09-03 | Exhaust purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410444707.1A CN104234790A (en) | 2014-09-03 | 2014-09-03 | Exhaust purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104234790A true CN104234790A (en) | 2014-12-24 |
Family
ID=52223584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410444707.1A Pending CN104234790A (en) | 2014-09-03 | 2014-09-03 | Exhaust purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104234790A (en) |
-
2014
- 2014-09-03 CN CN201410444707.1A patent/CN104234790A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |
|
| WD01 | Invention patent application deemed withdrawn after publication |