CN217233625U - White smoke purifier for diesel engine - Google Patents
White smoke purifier for diesel engine Download PDFInfo
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- CN217233625U CN217233625U CN202220195643.6U CN202220195643U CN217233625U CN 217233625 U CN217233625 U CN 217233625U CN 202220195643 U CN202220195643 U CN 202220195643U CN 217233625 U CN217233625 U CN 217233625U
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- electric heating
- control box
- white smoke
- heating control
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- 239000000779 smoke Substances 0.000 title claims abstract description 40
- 238000005485 electric heating Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000000746 purification Methods 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 19
- 239000003546 flue gas Substances 0.000 abstract description 18
- 239000002283 diesel fuel Substances 0.000 abstract description 12
- 238000002309 gasification Methods 0.000 abstract description 4
- 230000003313 weakening effect Effects 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 11
- 239000007789 gas Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 6
- 235000019504 cigarettes Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a diesel engine white smoke purification device, which comprises an electric heater, wherein the front end of the electric heater is provided with a smoke inlet, and the rear end of the electric heater is provided with a DOC reactor; a DOC catalyst is arranged in the DOC reactor; the electric heater is connected with the electric heating control box. An electric heating pipe is arranged in the electric heater and is connected with the electric heating control box. The electric heating control box is connected with the electric heating pipe through a heating control line. And a flow guide device is arranged at the inlet of the DOC reactor. End of the DOC reactorIs a smoke outlet. The heater is used for raising the temperature of the flue gas to the gasification temperature of the diesel oil, so that the diesel oil droplets are gasified into HC molecules, and the aim of weakening or completely eliminating the white smoke is fulfilled. The heater is coupled with the DOC reactor, the heater enables the temperature of the flue gas to rise to the active temperature range of the DOC reactor, and the DOC reactor oxidizes HC into H 2 O and CO 2 And the pollution of white smoke to the environment is thoroughly eliminated.
Description
Technical Field
The utility model relates to a diesel engine exhaust purification handles technical field, especially relates to a diesel engine white smoke purifier.
Background
With the continuous upgrade of emission regulations, the exhaust gas purification system gradually becomes an indispensable ring of the engine, and DOC, DPF and SCR are key technologies of the exhaust gas purification system of the vehicle and non-road engines.
DOC is used for oxidizing CO, NMHC and SOF in diesel engine tail gas and simultaneously can adjust NO in NOx 2 The SCR efficiency at low temperature is proportionally improved, and the passive regeneration of the DPF is promoted.
The DPF technology is used for filtering Particulate Matter (PM) in the diesel engine exhaust, DPF working process, when the pressure differential of both ends reaches certain threshold value, the dynamic property and the economic nature of engine can receive the influence, the engine switches to DPF regeneration mode this moment, controller (ACU) drive HC injection system sprays diesel oil to the exhaust, diesel oil passes through DOC oxidation heat release, thereby promote the exhaust temperature to above 555 ℃ with Particulate Matter (PM) oxidation one-tenth H2O and CO2 in the DPF, realize the thermal regeneration of DPF.
The SCR technology is used for reducing nitrogen oxides (NOx) in the tail gas of a diesel engine, the controller tracks the change of the working condition of the engine at all times in the SCR working process, a urea metering pump is driven to inject 32.5% urea aqueous solution into the tail gas based on a control strategy, the urea aqueous solution is decomposed into NH3 under the high-temperature condition, and the NH3 reduces the NOx into N2 under the action of a catalyst, so that the SCR meets the regulation requirements.
The DOC and SCR need proper temperature for efficient work, and under the working conditions of cold start, idling or no load of an engine, the temperature of tail gas is low, and an aftertreatment device cannot play a role, so that a tail gas purification system cannot control low-temperature working conditions NMHC and NOx. The engine industry stipulates standard emission test circulation according to the operation characteristics of working conditions in different application fields, emission regulations perform emission evaluation by the test circulation, and emission of a certain working condition point, such as cold start working condition, idling, no load or low load, is not strictly controlled. However, in some special fields, the engine can often operate under a low-temperature working condition, and the black smoke and white smoke engine body under a low-load working condition is extremely difficult to control and needs an auxiliary treatment of an exhaust gas purification device. For example, in the standby generator set industry, the high-load external output power can be normally output when the generator set is powered off, whether the engine is normal or not is checked every month at ordinary times, customers do not have power requirements, the engine can run under no-load low-temperature working conditions of about 35min after being cold started, and the engine is very easy to burn insufficiently to generate black smoke or white smoke under the working conditions.
The black smoke and the white smoke are both products which cannot be completely combusted by diesel, the main cost of the black smoke is solid carbon particles, and the main component of the white smoke is liquid oil drop particles which cannot be combusted. Adopt DPF filter can filter the purification that black cigarette realized black cigarette in tail gas purification device with black cigarette, however white cigarette handles comparatively difficultly, and liquid granule can not be filtered to DPF filter, and low temperature operating mode DOC also can not realize the oxidation that liquid drips, and adsorption techniques such as the active carbon in fixed source field also can satisfy high temperature resistant demand, can not be used for the diesel engine field. Therefore, the diesel engine white smoke treatment device needs to be designed to achieve the aim of white smoke purification.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem, providing a diesel engine white smoke purification device, utilizing the heater to promote the flue gas temperature to diesel oil gasification temperature, making the diesel oil liquid drop gasify into the HC molecule to the realization weakens or eliminates the purpose of white cigarette completely.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a diesel engine white smoke purification device comprises an electric heater, wherein the front end of the electric heater is provided with a smoke inlet, and the rear end of the electric heater is provided with a DOC (document information System) reactor;
a DOC catalyst is arranged in the DOC reactor;
the electric heater is connected with the electric heating control box. The electric heater raises the temperature of the flue gas to the gasification temperature of the diesel oil, so that the diesel oil droplets are gasified into HC molecules, thereby achieving the purpose of weakening or completely eliminating the white smoke. The electric heater is coupled with the DOC reactor, the electric heater enables the temperature of the smoke to rise to be within an active temperature range of the DOC reactor, and the DOC reactor oxidizes the HC into H2O and CO2, so that the pollution of the white smoke to the environment is thoroughly eliminated.
An electric heating pipe is arranged in the electric heater and is connected with the electric heating control box.
The electric heating control box is connected with the electric heating pipe through a heating control line.
And a flow guide device is arranged at the inlet of the DOC reactor. After entering the DOC reactor, the high-temperature flue gas forms uniformly flowing air flow at the front end of the DOC catalyst through the flow guide device.
And the tail end of the DOC reactor is a flue gas outlet.
An outlet temperature sensor is arranged between the electric heater and the DOC reactor, and the outlet temperature sensor is connected with the electric heating control box. And a hearth temperature sensor is arranged in the electric heater and is connected with the electric heating control box. Two paths of temperature sensors are adopted to accurately control the starting and stopping of the heater, so that unnecessary heating consumption is avoided, and the running cost of the system is reduced.
The electric heating control box is provided with a control box power supply line.
The beneficial effects of the utility model are that:
1. the heater is used for raising the temperature of the flue gas to the gasification temperature of the diesel oil, so that the diesel oil droplets are gasified into HC molecules, and the aim of weakening or completely eliminating the white smoke is fulfilled.
2. The heater is coupled with the DOC reactor, the heater enables the temperature of the flue gas to rise to the active temperature range of the DOC reactor, and the DOC reactor oxidizes HC into H 2 O and CO 2 And the pollution of white smoke to the environment is thoroughly eliminated.
3. Two paths of temperature sensors are adopted to accurately control the starting and stopping of the heater, so that unnecessary heating consumption is avoided, and the running cost of the system is reduced.
4. For the application in the field of generator sets, the electric heating is directly used as the load of the generator sets, so that the generator sets can avoid the no-load working condition, the exhaust temperature of an engine is improved, the heating power is reduced, and the operation cost is saved.
Drawings
FIG. 1 is a view of the structure of the present invention;
the system comprises a flue gas inlet 1, an electric heater 2, an electric heating pipe 3, a DOC reactor 4, a flow guide device 5, a DOC catalyst 6, a flue gas outlet 7, a hearth temperature sensor 8, an outlet temperature sensor 9, a heating control line 15, a control box power supply line 11 and an electric heating control box 12.
The specific implementation mode is as follows:
the invention will be further explained with reference to the following embodiments and drawings:
as shown in fig. 1, the diesel white smoke purification device comprises an electric heater 2, wherein a smoke inlet 1 is arranged at the front end of the electric heater 2, and a DOC reactor 4 is arranged at the rear end of the electric heater 2;
a DOC catalyst 6 is arranged in the DOC reactor 4;
the electric heater 2 is connected with an electric heating control box 12.
An electric heating pipe 3 is arranged in the electric heater 2, and the electric heating pipe 3 is connected with the electric heating control box 12.
The electric heating control box 12 is connected with the electric heating pipe 3 through a heating control line 15.
And a flow guide device 5 is arranged at the inlet of the DOC reactor 4.
The tail end of the DOC reactor 4 is a flue gas outlet 7.
An outlet temperature sensor 9 is arranged between the electric heater and the DOC reactor, and the outlet temperature sensor 9 is connected with the electric heating control box 12.
A hearth temperature sensor 8 is arranged in the electric heater 2, and the hearth temperature sensor 8 is connected with the electric heating control box 12.
The electric heating control box 12 is provided with a control box power supply line 11.
The working process of the utility model is as follows:
after the diesel engine is started, low-temperature flue gas enters the electric heater 2 through the flue gas inlet 1, and the flue gas is heated and the temperature of the flue gas is increased to be higher than 355 ℃ in the electric heater 2. The high-temperature smoke makes unburned diesel oil liquid drops absorb heat and gasify into HC molecules, thereby achieving the aim of weakening or completely eliminating white smoke.
The DOC reactor 4 is arranged at the rear end of the electric heater 2, high-temperature flue gas enters the DOC reactor 4 and then passes through the flow guide device 5 to form uniformly flowing air flow at the front end of the DOC catalyst 6, and NMHC and a small amount of unburned diesel oil liquid drops in the flue gas are oxidized under the action of the DOC catalyst 6 to generate CO 2 And finally discharged to the atmosphere through the flue gas outlet 7.
In order to avoid unnecessary heating and reduce the system operation cost, the control method of the electric heater 2 is as follows: when the temperature detected by the hearth temperature sensor 8 or the outlet temperature sensor 9 is lower than a set threshold value, the electric heating control box 12 outputs a heating starting signal, the electric heating pipe 3 is powered through a heating control line 15, and the flue gas heating function is started; when the temperature detected by the hearth temperature sensor 8 or the outlet temperature sensor 9 is higher than a set threshold value, the electric heating control box 12 outputs a heating stop signal, the electric heating pipe 3 stops supplying power, and the smoke heating function is closed.
The electric heating control box 12 obtains a 225V or 385V power supply through the control box power supply line 11, and for the application in the generator set field, the electric heating can be directly used as the load of the generator set, so that the generator set can avoid the no-load working condition, the exhaust temperature of the engine is improved, the heating power is reduced, and the operation cost is saved.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (7)
1. A diesel engine white smoke purification device is characterized by comprising an electric heater, wherein the front end of the electric heater is provided with a smoke inlet, and the rear end of the electric heater is provided with a DOC reactor;
a DOC catalyst is arranged in the DOC reactor;
the electric heater is connected with the electric heating control box;
and a flow guide device is arranged at the inlet of the DOC reactor.
2. The diesel engine white smoke purifying device of claim 1, wherein an electric heating tube is arranged in the electric heater, and the electric heating tube is connected with the electric heating control box.
3. The diesel engine white smoke purifying device of claim 2, wherein the electric heating control box is connected with the electric heating pipe through a heating control line.
4. The diesel white smoke purifying device of claim 1, wherein the DOC reactor is terminated with a smoke outlet.
5. The diesel engine white smoke purifying device of claim 1, wherein an outlet temperature sensor is arranged between the electric heater and the DOC reactor, and the outlet temperature sensor is connected with the electric heating control box.
6. The diesel engine white smoke purifying device of claim 5, wherein a hearth temperature sensor is arranged in the electric heater, and the hearth temperature sensor is connected with the electric heating control box.
7. A diesel white smoke purifying device according to any one of claims 1 to 6, characterized in that said electric heating control box is provided with control box power supply lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220195643.6U CN217233625U (en) | 2022-01-24 | 2022-01-24 | White smoke purifier for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220195643.6U CN217233625U (en) | 2022-01-24 | 2022-01-24 | White smoke purifier for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217233625U true CN217233625U (en) | 2022-08-19 |
Family
ID=82830998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220195643.6U Active CN217233625U (en) | 2022-01-24 | 2022-01-24 | White smoke purifier for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217233625U (en) |
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2022
- 2022-01-24 CN CN202220195643.6U patent/CN217233625U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231027 Address after: Room 801-3, Gaoxin Building, North of Yuqing East Street, Yuqing Community, Xincheng Street, Gaoxin District, Weifang City, Shandong Province, 261041 Patentee after: Shandong Xiushi Environmental Protection Technology Co.,Ltd. Address before: 262711 south of 1000m east of the intersection of North Ring Road and Tegang Road, Gucheng street, Shouguang City, Weifang City, Shandong Province Patentee before: SHANDONG KANGJUN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |