CN202325771U - Diesel oxidationcatalytic converter with hydrocarbon trapping function - Google Patents
Diesel oxidationcatalytic converter with hydrocarbon trapping function Download PDFInfo
- Publication number
- CN202325771U CN202325771U CN201120313062XU CN201120313062U CN202325771U CN 202325771 U CN202325771 U CN 202325771U CN 201120313062X U CN201120313062X U CN 201120313062XU CN 201120313062 U CN201120313062 U CN 201120313062U CN 202325771 U CN202325771 U CN 202325771U
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- hydrocarbon
- converter
- oxidationcatalytic
- tank body
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Abstract
The utility model belongs to the filed of controlling pollution discharged by a diesel, and particularly relates to an oxidationcatalytic converter which is capable of reducing the discharge of hydrocarbon in a cold start stage of the diesel. The oxidationcatalytic converter is characterized in that an upstream oxidationcatalytic converter 7, a downstream oxidationcatalytic converter 8 and a hydrocarbon trap 10 are encapsulated in the same tank body 5 and are in a 120-degree distribution, and thus the ignition time of the downstream oxidationcatalytic converter 8 is facilitated to be shortened; through the design of an end cover 1, tail gas can pass through the upstream oxidationcatalytic converter 7, the hydrocarbon trap 10 and the downstream oxidationcatalytic converter 8 in sequence; the hydrocarbon can be trapped by the hydrocarbon trap 10 in a cold start stage and a warming-up stage; and when catalyst of the downstream oxidationcatalytic converter 8 is lighted, the trapped hydrocarbon can be released and can be oxidized in the downstream oxidationcatalytic converter 8. According to the oxidationcatalytic converter disclosed by the utility, lower discharge of the hydrocarbon in the cold start stage and the warming-up stage can be realized.
Description
Technical field
The utility model belongs to diesel engine vent gas post-processing technology field, relates in particular to a kind of oxidation catalysis reforming unit that can reduce diesel engine cold start-up hydrocarbon emissions.
Background technique
Diesel engine has the good and economic and the high thermal efficiency, is developed fast in recent years, and it all is diesel-oil vehicle that the new car more than 1/3rd is arranged in Europe.The fast development of diesel engine has been played important function for reducing energy consumption; But diesel emission is also given the air quality deleterious impact; Particularly in the cold start-up stage of diesel engine because start that rotating speed is lower, gas leakage and thermal loss increase the weight of, the compression temperature when causing the diesel engine cold start-up, compression pressure are than much lower under the normal operating condition; Spray into the unlikely normal immediately spontaneous combustion of fuel oil of firing chamber; Before the fuel oil spontaneous combustion, the fuel oil that sprays in the cylinder will be discharged cylinder with the form of unburned carbon hydrogen, makes that the hydrocarbon emission in diesel engine cold start-up stage is very serious; The hydrocarbon of the high concentration of discharging during cold start-up shows as white cigarette, is one of tedious environmental problem of diesel engine for automobile of often wanting cold start-up.
In existing diesel engine post-processing technology; The diesel oxidation converter can reduce particle emission through the SOF Soluble Organic Fraction SOF that consumes in the particulate; Also reduce simultaneously the discharging of hydrocarbon and carbon monoxide, convert this part waste gas into carbon dioxide and water, but when delivery temperature is lower than 150 ℃; Catalyzer on the oxidation catalytic converter is inoperative basically, makes the effect that the diesel oxidation converter can't be brought into normal play in the cold start-up stage of diesel engine.
Summary of the invention
The technical problem that the utility model will solve is to the deficiency of conventional diesel engine oxidation catalytic converter, to propose a kind of diesel oxidation converter that can reduce hydrocarbon emission in cold start-up and the warming-up process.
For achieving the above object; The technological scheme that the utility model adopts is: hydrocarbon catcher and upper reaches oxidation catalytic converter, downstream oxidation catalytic converter are encapsulated in the tank body 5, and the inner space of tank body 5 has been split into and has been 120 ° three parts, and externally is provided with three equally distributed attachment holes with the joint of end cap 1; Upper reaches oxidation catalytic converter 7, downstream oxidation catalytic converter 8, hydrocarbon catcher 10 are encapsulated in the tank body 5; Three's carrier all is 120 ° a fan-shaped cylinder, match with the inner space of tank body 5, and and tank body between bed course 9 is set separately; The inner space of end cap 1 is divided into two parts; Entrance space is 120 ° of fan-shaped parts, and all the other 240 ° of sector spaces are the space that is used for the air-flow transition, and the outside is provided with the attachment hole corresponding with tank body 5.Through design, make tail gas successively through upper reaches oxidation catalytic converter 7, hydrocarbon catcher 10 and downstream oxidation catalytic converter 8 to end cap.When cold start-up and warming-up; Hydrocarbon catcher 10 captures the hydrocarbon of discharging, and along with the rising of delivery temperature, upper reaches oxidation catalytic converter 7 at first is heated ignition; And follow-up tail gas carried out normal handling; Downstream oxidation catalytic converter 8 is ignition subsequently, and at this moment hydrocarbon catcher 10 discharges the hydrocarbon that captures, and oxidized in downstream oxidation catalytic converter 8.
Hydrocarbon trapping technique principle is in the utility model: zeolite molecular sieve has uniform micropore, and the aperture is suitable with general molecular size, can sieve various fluid molecules according to its working aperture.Act on solid surface through molecular attraction and produce surface force; When fluid flow through, a part of molecule in the fluid produced the dense of molecule and gathers because irrgular movement collides adsorbent surface; Make this molecule decreased number in the fluid; The purpose of reach separation, removing, when temperature rose to a certain degree, the dense molecule that gathers can be released out again.Utilize this specific character of molecular sieve, can be implemented under the low temperature hydrocarbon absorption, the purpose that behind the catalyzer ignition, more adsorbed hydrocarbon is discharged.
The good effect of the utility model is; Utilize absorption, the desorption characteristics of zeolite molecular sieve; And reduce the hydrocarbon emission during the cold start-up through rational Match with oxidation catalytic converter; Having does not need additional energy consumption, simple in structure, advantage that cost is low, has the potentiality that significantly reduce hydrocarbon emission.
Description of drawings
Fig. 1 is the utility model structural representation;
Among the figure: 1. end cap, 2. connecting bolt, 3. nut, 4. nut shim, 5. tank body, 6. end cap pad.
Fig. 2 is the side view after tank body, oxidation catalytic converter, hydrocarbon catcher, the bed course encapsulation;
Among the figure: 7. upper reaches oxidation catalytic converter, 8. downstream oxidation catalytic converter, 9. bed course, 10. hydrocarbon catcher.
Fig. 3 is the carrier coating structural representation;
Among the figure: 11. honeycomb ceramic monoliths, 12. water vapor adsorption coatings, 13. hydrocarbon absorbent coatings.
Fig. 4 is the flow process schematic representation;
Fig. 5 is the end cap cut-away view;
Fig. 6 is the tank interior structural drawing;
Fig. 7 is end cap pad figure.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further specified.
Like Fig. 1,5,6, shown in 7: connecting bolt 2, nut 3, nut shim 4 are connected end cap 1 with tank body 5, in order to guarantee sealing, are provided with end cap pad 6 between end cap 1 and the tank body 5, are convenient to dismounting.
Like Fig. 2,4, shown in 6: the inner space of tank body 5 has been split into and has been 120 ° three parts, and externally is provided with three equally distributed attachment holes with the joint of end cap 1.Upper reaches oxidation catalytic converter 7, downstream oxidation catalytic converter 8, hydrocarbon catcher 10 are encapsulated in the tank body 5; Three's carrier all is 120 ° a fan-shaped cylinder; Match with the inner space of tank body 5; And and tank body between bed course 9 is set separately, compact structure, be convenient to replacement, made things convenient for the quick ignition of downstream oxidation catalytic converter 8 simultaneously.The inner space of end cap 1 is divided into two parts, and entrance space is 120 ° of fan-shaped parts, and all the other 240 ° of sector spaces are the space that is used for the air-flow transition, and the outside is provided with the attachment hole corresponding with tank body 5.Through the design of end cap 1, make gas flow through successively: upper reaches oxidation catalytic converter 7, hydrocarbon catcher 10 and downstream oxidation catalytic converter 8.When cold start-up and warming-up; Hydrocarbon catcher 10 captures the hydrocarbon of discharging; Along with the rising of delivery temperature, upper reaches oxidation catalytic converter 7 at first is heated ignition follow-up tail gas is carried out normal handling, and downstream oxidation catalytic converter 8 is owing to receive the heat effect ignition as soon as possible of heating and the tank body dividing plate of air-flow; At this moment hydrocarbon catcher 10 discharges the hydrocarbon that captures, and oxidized in downstream oxidation catalytic converter 8.
As shown in Figure 3: hydrocarbon catcher 10 is made up of three parts: the hydrocarbon absorbent coating 13 of honeycomb ceramic monolith 11, bottom and the water vapor adsorption coating 12 on top.Double-deck absorbent coating is applied on the honeycomb ceramic monolith 11 of hydrocarbon catcher 10; The top coating is a water vapor adsorption coating 12; Because having water vapour during cold start-up produces; The existence of water vapour can influence the removal efficient of hydrocarbon, has selected for use water vapor adsorption coating 12 at first to remove the water vapour composition in the tail gas for this reason; Base coat is hydrocarbon absorbent coating 13, has big hydrocarbon absorbing capacity and higher desorption temperature, has good hydrothermal stability and high hydrophoby simultaneously, guarantees long-time reliable work.
Claims (2)
1. diesel oxidation converter with hydrocarbon capture function; It is characterized in that: the inner space of tank body (5) has been split into and has been 120 ° three parts; And externally be provided with three equally distributed attachment holes with the joint of end cap (1), and upper reaches oxidation catalytic converter (7), downstream oxidation catalytic converter (8), hydrocarbon catcher (10) are encapsulated in the tank body (5), and three's carrier all is 120 ° a fan-shaped cylinder; Match with the inner space of tank body (5); And and tank body between bed course (9) is set separately, the inner space of end cap (1) is divided into two parts, entrance space is 120 ° of fan-shaped parts; All the other 240 ° of sector spaces are the space that is used for the air-flow transition, and the outside is provided with and the corresponding attachment hole of tank body (5).
2. a kind of diesel oxidation converter with hydrocarbon capture function according to claim 1, it is characterized in that: said hydrocarbon catcher (10) is made up of three parts: the hydrocarbon absorbent coating (13) of honeycomb ceramic monolith (11), bottom and the water vapor adsorption coating (12) on top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120313062XU CN202325771U (en) | 2011-08-25 | 2011-08-25 | Diesel oxidationcatalytic converter with hydrocarbon trapping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120313062XU CN202325771U (en) | 2011-08-25 | 2011-08-25 | Diesel oxidationcatalytic converter with hydrocarbon trapping function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325771U true CN202325771U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120313062XU Expired - Fee Related CN202325771U (en) | 2011-08-25 | 2011-08-25 | Diesel oxidationcatalytic converter with hydrocarbon trapping function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202325771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110636893A (en) * | 2017-06-16 | 2019-12-31 | 优美科股份公司及两合公司 | Combined soot filter and urea hydrolysis |
-
2011
- 2011-08-25 CN CN201120313062XU patent/CN202325771U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110636893A (en) * | 2017-06-16 | 2019-12-31 | 优美科股份公司及两合公司 | Combined soot filter and urea hydrolysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20150825 |
|
| EXPY | Termination of patent right or utility model |