CN215521021U - Diesel engine tail gas purification device - Google Patents
Diesel engine tail gas purification device Download PDFInfo
- Publication number
- CN215521021U CN215521021U CN202120971231.2U CN202120971231U CN215521021U CN 215521021 U CN215521021 U CN 215521021U CN 202120971231 U CN202120971231 U CN 202120971231U CN 215521021 U CN215521021 U CN 215521021U
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- CN
- China
- Prior art keywords
- flue gas
- purifier
- electric heater
- diesel engine
- shunt
- Prior art date
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- 238000000746 purification Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000003546 flue gas Substances 0.000 claims abstract description 50
- 230000003197 catalytic effect Effects 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 23
- WWHFPJVBJUJTEA-UHFFFAOYSA-N n'-[3-chloro-4,5-bis(prop-2-ynoxy)phenyl]-n-methoxymethanimidamide Chemical compound CONC=NC1=CC(Cl)=C(OCC#C)C(OCC#C)=C1 WWHFPJVBJUJTEA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 15
- 229910000510 noble metal Inorganic materials 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000010970 precious metal Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 230000008929 regeneration Effects 0.000 abstract description 6
- 238000011069 regeneration method Methods 0.000 abstract description 6
- 238000007084 catalytic combustion reaction Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 11
- 229910052763 palladium Inorganic materials 0.000 description 6
- 229910052697 platinum Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000013618 particulate matter Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a diesel engine tail gas cleanup unit, includes electric heater, flue gas shunt and flue gas purifier, the electric heater air inlet passes through the pipeline and links to each other with the chimney, flue gas purifier passes through the flue gas shunt and links to each other with electric heater, and diesel engine tail gas is the evacuation after electric heater, flue gas shunt and flue gas purifier purify in proper order, wherein flue gas purifier including the oxidation type catalytic converter DOC and the catalytic type particle trap CDPF of establishing ties in order. The temperature during catalytic combustion is controlled by the electric heater and the temperature transmitter, so that catalytic oxidation is more sufficient, and HC, CO and carbon particles in tail gas can be more effectively removed; the regeneration of the particulate filter is realized by depending on the temperature of the tail gas of the diesel engine, so that the service life of the filter is prolonged; flue gas purifier can increase and decrease quantity according to actual demand to reduce the flue gas resistance, improve purification efficiency.
Description
Technical Field
The utility model relates to a device for filtering and purifying tail gas discharged by a diesel engine by adopting an electric heater and a smoke purifier.
Background
Because the diesel engine has high thermal efficiency, economical efficiency and low CO compared with the gasoline engine2The amount of emissions, and therefore, diesel engines have bright future. However, with the increasing awareness of environmental protection, the serious pollution of diesel engine exhaust to the environment is receiving wide attention. Harmful gas generated by insufficient combustion in the process of load operation of the diesel engine not only pollutes the environment, but also can be inhaled by human bodies, so that the health of people can be seriously influenced, the emission of tail gas of the diesel vehicle is reduced, the health of people is ensured, and the sustainable development of economy, environment and the living standard of people is realized. In recent years, the emission of diesel engine pollution has been greatly reduced by exhaust gas treatment systems with catalytic function. But still has the disadvantages of 1. the temperature during catalytic combustion cannot be controlled, and particulate matters and NO in the tail gas cannot be completely removedxHC, CO and harmful gases; 2. the flue gas resistance is large, and the purification efficiency is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, HC, CO and organic matters (SOF) in PM in the tail gas are oxidized and removed by DOC after the front end is heated, and simultaneously, the precious matters in CDPF are utilizedMetal and NO2The reaction with carbon can remove NO, and noble metal and NO are used2The combustion temperature of tail gas is reduced, the regeneration of the particulate filter is realized by depending on the temperature of the tail gas of the diesel engine, the purification efficiency is high, the use is convenient, and the like, and the environment is well protected.
The technical scheme of the utility model is as follows:
the utility model provides a diesel engine tail gas cleanup unit, includes electric heater, flue gas shunt and gas purifier, the electric heater air inlet passes through the pipeline and links to each other with the chimney, gas purifier passes through the flue gas shunt and links to each other with electric heater, and diesel engine tail gas is in proper order through evacuation after electric heater, flue gas shunt and the gas purifier purifies, wherein
The flue gas purifier comprises an oxidation type catalytic converter DOC and a catalytic type particle catcher CDPF which are connected in series in sequence.
Furthermore, the electric heating device also comprises an electric cabinet and a temperature transmitter, wherein the temperature transmitter is electrically connected with the electric cabinet and controls the start and stop of the heater through the electric cabinet.
Further, the smoke diverter further comprises a pressure transmitter, the pressure transmitter is electrically connected with the electric cabinet, and the pressure transmitter transmits pressure signals in the smoke diverter to a display screen of the electric cabinet.
Further, the electric heater gas vent is linked together with flue gas shunt air inlet, the flue gas shunt with gas purifier is linked together, gas purifier is a plurality of.
Further, smoke purifier is two, first smoke purifier and second smoke purifier air inlet are linked together with smoke diverter gas vent respectively.
Furthermore, the oxidation type catalytic converter DOC is internally provided with precious metal as a catalyst, and when the temperature is increased to more than 180 ℃, harmful gases such as HC and CO in the tail gas are catalyzed to generate H2O and CO2. The catalytic particle trap CDPF is internally provided with a precious metal coating and NO2Carbon particles into CDPF on noble metal coating and NO2Is oxidized into gaseous CO2。
The noble metal catalyst in the oxidation type catalytic converter is platinum or rhodium or palladium.
The noble metal catalyst in the catalytic particle catcher is platinum or rhodium or palladium.
Further, still include the cabinet body, electric heater, flue gas shunt, electric cabinet, gas cleaning ware, temperature transmitter, pressure transmitter all install in the cabinet internally.
Compared with the prior art, the utility model has the advantages that:
1. the temperature during catalytic combustion is controlled by the electric heater and the temperature transmitter, so that catalytic oxidation is more sufficient, and HC, CO and carbon particles in tail gas can be more effectively removed;
2. the regeneration of the particulate filter is realized by depending on the temperature of the tail gas of the diesel engine, so that the service life of the filter is prolonged;
3. flue gas purifier can increase and decrease quantity according to actual demand to reduce the flue gas resistance, improve purification efficiency.
Drawings
Fig. 1 is a schematic structural view of an exhaust gas purifying apparatus according to embodiment 1.
The system comprises an electric heater 1, a smoke diverter 2, an electric cabinet 3, a first smoke purifier 4, a second smoke purifier 5, a temperature transmitter 6 and a pressure transmitter 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in figure 1, the diesel engine tail gas purification device provided by the utility model comprises an electric heater, a flue gas splitter and a flue gas purifier, wherein an air inlet of the electric heater is connected with a chimney through a pipeline, the electric heater is 15W, the flue gas purifier is connected with the electric heater through the flue gas splitter, diesel engine tail gas is purified and then emptied through the electric heater, the flue gas splitter and the flue gas purifier in sequence, and the diesel engine tail gas is purified and then emptied
The flue gas purifier comprises an oxidation type catalytic converter DOC and a catalytic type particle catcher CDPF which are mechanically connected in series in sequence. In particular to a 303mmDOC oxidation type catalytic converter and a CDPF catalytic type particle catcher, which are called filter elements for short.
The catalyst consists of a carrier and a noble metal catalytic coating; can greatly treat harmful gases such as CO, HC, NOx and the like, and has good filtering effect on PM particles.
The requirement on the temperature of the outlet waste gas is high, and the cost of the filter element is high; the noble metal is used as a catalyst and reacts with HC, CO and harmful gases in the tail gas to generate H at the temperature of more than 180 ℃ (the optimal reaction temperature is 350 ℃ and 500 ℃)2O and CO2。
DOC (oxidation catalytic converter) mainly uses precious metals such as Pt and Pd as catalysts, and mainly reduces HC, CO, soot and the like in exhaust emission.
CDPF (catalytic particle trap), function: a. capturing particulate matter; b. reducing the activation reaction of the particles; c. in NO2The particles are oxidized under the action of the catalyst to achieve the passive regeneration of the CDPF; d. and simultaneously, CO and HC are further catalyzed and oxidized, and the emission of CO and HC is reduced.
Carbon particles trapped in CDPF in NO2And noble metal coating platinum and palladium to oxidize carbon particles into gaseous CO2And completing the trapping of the carbon particles and the passive regeneration of the particle catcher. The passive regeneration is to coat a catalyst on a DPF carrier, reduce the activation reaction energy of particulate matter using the catalyst, lower the natural temperature of particulate matter to about 350 ℃, and perform combustion (combustion in a filter) at the normal exhaust temperature of a diesel engine.
And a temperature transmitter is arranged above the electric heater.
The temperature transmitter is electrically connected with the electric cabinet, and the start and stop of the heater can be controlled by the electric cabinet.
The electric heater gas vent is linked together with flue gas shunt air inlet, flue gas shunt top is provided with pressure transmitter, pressure transmitter is connected with the electric cabinet electricity, pressure transmitter conveys flue gas shunt internal pressure signal to the display screen of electric cabinet, shows pressure and reports to the police, and flue gas shunt high pressure then cuts off the power supply, dismantles flue gas shunt filter screen and washs.
The temperature controlled by the electric heater is between 70 and 220 ℃.
Preferably, the gas purifier is two, first gas purifier and second gas purifier air inlet are linked together with the flue gas shunt gas vent respectively.
The smoke purifier comprises an oxidation type catalytic converter DOC, precious metals are arranged in the oxidation type catalytic converter as catalysts, and when the temperature rises to over 180 ℃, harmful gases such as HC, CO and the like in tail gas are catalyzed to generate H2O and CO2. The flue gas purifier also includes a catalytic particle trap CDPF having a precious metal coating and NO therein2Carbon particles into CDPF on noble metal coating and NO2Is oxidized into gaseous CO2。
The noble metal catalyst in the oxidation-type catalytic converter is platinum.
The noble metal catalyst in the catalytic particle trap is platinum.
Example 2
The present embodiment is different from embodiment 2 in that:
the flue gas purifier is three and is connected in parallel.
The noble metal catalyst in the oxidation type catalytic converter is palladium.
The noble metal catalyst in the catalytic particle trap is palladium.
The rest is the same as in example 2.
Claims (7)
1. A diesel engine tail gas cleanup unit which characterized in that: comprises an electric heater, a flue gas flow divider and a flue gas purifier, wherein the flue gas purifier is connected with the electric heater through the flue gas flow divider, the tail gas of the diesel engine is purified and then emptied by the electric heater, the flue gas flow divider and the flue gas purifier in sequence, wherein
The flue gas purifier comprises an oxidation type catalytic converter DOC and a catalytic type particle catcher CDPF which are connected in series in sequence.
2. The exhaust gas purification apparatus according to claim 1, characterized in that: the temperature transmitter is electrically connected with the electric cabinet, and the electric cabinet controls the start and stop of the heater.
3. The exhaust gas purification device according to claim 2, characterized in that: the smoke diverter is characterized by further comprising a pressure transmitter, wherein the pressure transmitter is electrically connected with the electric cabinet and transmits pressure signals in the smoke diverter to the display screen of the electric cabinet.
4. The exhaust gas purification device according to claim 1, characterized in that: the electric heater gas vent is linked together with flue gas shunt air inlet, the flue gas shunt with smoke purifier is linked together, smoke purifier is a plurality of.
5. The exhaust gas purification device according to claim 1, characterized in that: flue gas purifier is two, is first flue gas purifier and second flue gas purifier respectively, first flue gas purifier and second flue gas purifier air inlet are linked together with flue gas shunt gas vent respectively.
6. The exhaust gas purification device according to claim 5, characterized in that: noble metals are used as catalysts in the oxidation type catalytic converter DOC; the catalytic particle trap CDPF is internally provided with a precious metal coating and NO2。
7. The diesel engine exhaust gas purification device according to any one of claims 1 to 6, characterized in that: still include the cabinet body, electric heater, flue gas shunt, electric cabinet, gas cleaning ware, temperature transmitter, pressure transmitter all install in the cabinet internally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120971231.2U CN215521021U (en) | 2021-05-08 | 2021-05-08 | Diesel engine tail gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120971231.2U CN215521021U (en) | 2021-05-08 | 2021-05-08 | Diesel engine tail gas purification device |
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| Publication Number | Publication Date |
|---|---|
| CN215521021U true CN215521021U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120971231.2U Active CN215521021U (en) | 2021-05-08 | 2021-05-08 | Diesel engine tail gas purification device |
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| Country | Link |
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| CN (1) | CN215521021U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163258A (en) * | 2022-07-12 | 2022-10-11 | 得州排放控制技术(无锡)有限公司 | Novel parking type diesel engine tail gas low temperature purification station |
| CN115234345A (en) * | 2022-07-12 | 2022-10-25 | 得州排放控制技术(无锡)有限公司 | Heated Modular Mobile Diesel Exhaust Zero Emission Purification Device |
-
2021
- 2021-05-08 CN CN202120971231.2U patent/CN215521021U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163258A (en) * | 2022-07-12 | 2022-10-11 | 得州排放控制技术(无锡)有限公司 | Novel parking type diesel engine tail gas low temperature purification station |
| CN115234345A (en) * | 2022-07-12 | 2022-10-25 | 得州排放控制技术(无锡)有限公司 | Heated Modular Mobile Diesel Exhaust Zero Emission Purification Device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |