CN108906794B - Cleaning device for non-gas-assisted SCR urea pipeline - Google Patents
Cleaning device for non-gas-assisted SCR urea pipeline Download PDFInfo
- Publication number
- CN108906794B CN108906794B CN201810811774.0A CN201810811774A CN108906794B CN 108906794 B CN108906794 B CN 108906794B CN 201810811774 A CN201810811774 A CN 201810811774A CN 108906794 B CN108906794 B CN 108906794B
- Authority
- CN
- China
- Prior art keywords
- urea
- pump
- liquid
- air
- cleaning
- 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.)
- Active
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 294
- 239000004202 carbamide Substances 0.000 title claims abstract description 294
- 238000004140 cleaning Methods 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 159
- 230000002000 scavenging effect Effects 0.000 claims description 14
- 239000000243 solution Substances 0.000 description 20
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 230000008018 melting Effects 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
- Treating Waste Gases (AREA)
Abstract
The cleaning device for the non-air-assisted SCR urea pipeline comprises a urea tank, a urea pump, a urea metering nozzle, a urea liquid supply pipe, a urea liquid return pipe and a cleaning pump, and is characterized in that the cleaning pump is an electric air pump, when the urea pipeline needs to be cleaned, the electric air pump starts to work, and air sucked from the atmosphere is pressurized and then blown into the urea pump, the urea pipe and the urea metering nozzle, so that liquid urea in the air pump is discharged to the urea tank or an engine exhaust pipe.
Description
Technical Field
The invention belongs to the field of engine emission control, and particularly relates to a urea solution supply metering system of an engine exhaust selective reduction (SCR) technology.
Background
With the increasing prominence of environmental problems, energy conservation and emission reduction have become ever-endless demands for vehicles and engines, and for this reason, a series of vehicle emission standards are being put out in various countries, and are becoming more and more strict. For this purpose, internal combustion engine powered vehicles require the installation of an exhaust aftertreatment system in order to meet the emission requirements. For example, SCR (Selective Catalytic Reduction) technology, which is mainly used for catalytic treatment of pollutants such as NOx in diesel engine exhaust gas, has become a technology that is required for diesel vehicles and the like.
SCR technology requires that NOx reduction reagent be quantitatively injected into diesel engine exhaust, mixed with the exhaust, and then introduced into an SCR catalytic converter. The reducing agent is a 32.5% strength by weight aqueous urea solution (also called diesel exhaust fluid def= Diesel Exhaust Fluid, or blue-added fluid AdBlue), or ammonia.
Due to the characteristics of the urea aqueous solution, after the injection is finished, the urea mixed solution remained in the closed urea system and the pipeline may be frozen below the freezing point (-11-12 ℃) of the urea solution, which not only can cause interruption of urea injection, but also can cause damage to the urea injection system due to expansion of the urea solution volume during freezing. Most of the existing SCR technology considers that an auxiliary heating device is additionally arranged to ensure that the system works normally. However, the existing devices for providing the injection power source are too large or other reasons, so that the system components are difficult to be integrated into the DEF liquid storage tank, and the ice melting device with complex design is often required, so that the system is more large, difficult to arrange and high in cost.
In addition, even if the environment temperature is higher than the freezing point of urea solution, the residual liquid may lose moisture to cause urea crystallization or crystals (diminution, lan) after chemical change in the high temperature area of the nozzle, which may cause serious consequences such as pipeline blockage or nozzle failure.
In order to comprehensively solve the problems of freezing of urea aqueous solution, expansion damage of parts due to freezing, crystallization blockage in a pipe and the like, a common solution is to discharge urea solution in a closed urea system pipeline before stopping for a long time. The method for discharging urea solution comprises the following steps: 1) A compressed air cleaning device is additionally arranged, and the compressed air on the vehicle is utilized to clean the urea aqueous solution remained in the pipeline or the nozzle; 2) The residual solution along the pipeline and the nozzle is pumped back into the urea tank in a vacuum pumping mode. However, other problems are brought to vehicles or other power devices by consuming the compressed air on the vehicles, instability of liquid injection and atomization is brought to the compressed air source, the exhaust pressure fluctuation of the engine and the like, and the injection and atomization of the system are easily influenced; in other cases, such as oil brake vehicles or off-road machinery, solving the source of compressed air itself is a problem. The urea solution is removed by adopting a vacuumizing mode, such as a diaphragm vacuum pump, and the vacuum pump has limited capacity due to the limitation of cost and volume, so that the low-pressure flowing air has low cleaning capacity on liquid, and the effect is not ideal. If the ejector vacuum pump is adopted, besides the limited capability of the vacuum pump, the air suction noise is difficult to reduce, and the complaint of users is easily caused.
In summary, the prior art solves the problems of cost, air source, vacuum pump capacity, noise and the like of cleaning residual solution in the SCR system, and a new technical scheme with simple structure, high reliability and convenient application is very necessary.
Disclosure of Invention
The invention aims at the problems and aims at providing the SCR urea pipeline cleaning device which has the advantages of simple structure, good adaptability and low cost and does not need to consume vehicle-mounted compressed air.
In order to achieve the purpose, the invention adopts the following technical scheme that the SCR pipeline cleaning device comprises a urea box, a urea pump, a urea metering nozzle, a urea liquid supply pipe, a urea liquid return pipe and a cleaning pump. The cleaning pump is an electric air pump, and when the urea pipeline needs to be cleaned, the electric air pump is started to work, air sucked from the atmosphere is pressurized and then blown into the urea pump, the urea pipe and the urea metering nozzle, so that liquid urea in the air pump is discharged to a urea tank or an engine exhaust pipe. The scavenging pump may be a diaphragm air pump. The urea metering nozzle can be an electric control nozzle, constant pressure liquid is provided by a urea pump, the metering nozzle controls the injection quantity through the power-on time, and the urea metering nozzle can also be a pulse pump nozzle, and the injection quantity is controlled through a given pulse signal.
An alternative scheme of the SCR pipeline cleaning device is that the urea pump is an external pump of the urea tank. The urea pump comprises a liquid inlet, the urea box is connected with the liquid inlet of the urea pump through a liquid suction pipe, a filtering device is arranged at the other end of the liquid suction pipe, urea solution enters the liquid suction pipe after being filtered, a urea liquid return pipe is also arranged between the urea pump and the urea box, a urea liquid supply pipe is connected with the urea pump and the urea metering nozzle, urea liquid in the urea box is extracted by the urea pump through the liquid suction pipe, and then is conveyed to the urea metering nozzle through the urea liquid supply pipe, a urea metering pump quantitatively injects the urea solution into an exhaust pipe according to the requirement, and reflux liquid generated in the working process of the urea pump flows back into the urea box through the urea liquid return pipe.
According to an improvement of the scheme, the cleaning pump is arranged on the urea pump body and arranged outside the urea box and comprises an air inlet and a pressurized air outlet. The air inlet of the cleaning pump is directly led to the atmosphere, the pressurized air outlet of the cleaning pump is connected with the liquid inlet of the urea pump, the air pumped by the cleaning pump enters from the liquid inlet of the urea pump after being pressurized, is output from the urea liquid return pipe and is led to the liquid supply pipe through the urea pump body, and is blown into the exhaust pipe through the urea metering nozzle, so that the purpose of cleaning residual urea liquid in the pipeline is achieved.
The pressurized air outlet of the scavenging pump is provided with a one-way valve to prevent urea liquid in the urea liquid supply pipe from flowing back into the scavenging pump when the urea pump works.
The other alternative scheme of the SCR pipeline cleaning device is that the urea pump is a built-in pump of the urea tank and is fixed on a urea liquid supply module, the urea pump extends into the bottom of the urea tank along with one end of the module, and a filter screen is arranged at a liquid inlet of the urea pump. The urea metering device is characterized in that a liquid outlet flow path and a urea liquid outlet nozzle are arranged at the upper end of the supply module and positioned at the top of the urea box, the liquid outlet flow path is communicated with the urea pump and the urea liquid outlet nozzle, and the urea liquid supply pipe is connected with the urea liquid outlet nozzle and the urea metering nozzle. The upper end of the supply module is also provided with a liquid return flow path and a liquid return connector, the urea metering nozzle is also provided with a urea liquid return connector, the urea liquid return pipe is connected with the two liquid return connectors, and the other end of the liquid return connector of the module is led into the upper space of the urea box. The urea solution filtered by the filter screen is pumped out by a urea pump and is conveyed to a metering nozzle through a liquid outlet flow path and a urea liquid supply pipe, the urea metering pump quantitatively injects the urea solution into an exhaust pipe according to the requirement, and reflux liquid generated in the working process flows back into the urea box through a liquid return joint and a urea liquid return flow path.
In the scheme, the cleaning pump is arranged on the supply module and arranged outside the urea box, and comprises an air inlet and a pressurized air outlet, an air suction pipeline and an air output pipeline are arranged inside the supply module, one end of the air suction pipeline is communicated with the upper space of the urea box, and the other end of the air suction pipeline is connected with the air inlet of the cleaning pump. One end of the air output pipeline is communicated with the liquid outlet flow path, and the other end of the air output pipeline is connected with a pressurized air outlet of the scavenging pump. When the cleaning pump is started, air is pumped from the upper space of the urea box, pressurized air is input into the air output pipeline, flows through the liquid outlet flow path, the urea liquid supply pipe, the urea metering nozzle, the liquid return nozzle and the liquid return flow path and returns to the urea box, so that urea liquid in the liquid return nozzle is removed, and normal use of each working pipeline is ensured. The cleaning pump drives air flow in the urea box to realize internal circulation, and cleaning of each pipeline is further promoted.
The air output pipeline of the scavenging pump is provided with a one-way valve to prevent urea liquid in the urea liquid supply pipe from flowing back into the scavenging pump when the urea pump works.
The supply module further comprises a bracket, a temperature sensor, a liquid level sensor and a urea quality sensor. The stand is integrated with an ice melting device, and the pipette or urea pump is arranged near the ice melting device in a manner that facilitates thawing. The ice melting device may be an engine coolant water pipe.
The invention has the advantages of small volume of each part, high integration level, no need of adding other devices, convenient arrangement, low cost and easy popularization and application.
The invention is described in further detail below with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of a second embodiment of the present invention.
FIG. 3 is a third schematic diagram of an embodiment of the present invention.
Detailed Description
The first embodiment of the present invention is schematically shown in fig. 1, and the SCR pipeline cleaning device 1 includes a supply module 15, a urea tank 2, a urea pump 6, a urea metering nozzle 9, a urea supply pipe 7, a urea return pipe 14, and a cleaning pump 4. The urea pump 6 comprises a liquid inlet 6a. The supply module 15 comprises an ice melting device 13, a temperature sensor 18, a level sensor 19, and a urea quality sensor 10. The urea metering nozzle 9 is a pulse pump nozzle, the injection quantity is controlled by a given pulse signal, and the urea metering nozzle 9 comprises a urea liquid return nozzle 9a.
Further, the SCR pipeline cleaning device 1 includes a liquid suction pipe 12, the liquid inlet 6a of the urea pump is connected with the urea tank 2 through the liquid suction pipe 12, a filtering device 11 is arranged at one end of the liquid suction pipe 12 immersed in the urea tank 2, and the liquid suction pipe 12 and the filtering device 11 are arranged near the ice melting device 13 in a thawing mode so as to ensure that the urea solution is normally supplied in the working state, and the liquid in the urea tank 2 enters the liquid suction pipe 12 after being filtered. The urea return pipe 14 is also arranged between the urea pump 6 and the urea tank 2, and the urea supply pipe 7 connects the urea pump 6 and the urea metering nozzle 9. The upper end of the supply module 15 is provided with a liquid return channel 17 and a liquid return nozzle 16, the urea metering nozzle 9 is also provided with a urea liquid return nozzle 9a, the urea liquid return channel 17 is connected with the two liquid return nozzles (9 a and 16), and the other end of the liquid return nozzle 16 of the module is led into the upper space of the urea box 2.
The cleaning pump 4 is arranged on the urea pump 6 body and is arranged outside the urea tank 2, and comprises an air inlet 4a and a pressurized air outlet 4b, an air suction pipeline 3 is arranged in the supply module 15, one end of the air suction pipeline 3 is communicated with the upper space of the urea tank 2, and the other end of the air suction pipeline is connected with the air inlet 4a of the cleaning pump 4. The pressurized air outlet 4b of the scavenging pump 4 is connected with the liquid inlet 6a of the urea pump 6, and the air in the upper space of the urea tank 2 is sucked and pressurized by the scavenging pump 4 and then enters the urea pump 6 from the pressurized air outlet 4b. The pressurized air outlet 4b of the scavenging pump 4 is provided with a non-return valve 5, which non-return valve 5 is located upstream of the urea pump 6, with the purpose of preventing urea liquid in the urea supply pipe 7 from flowing back into the scavenging pump 4 when the urea pump 6 is in operation.
When the SCR pipeline cleaning device 1 is in a liquid spraying state, the urea pump 6 pumps urea liquid in the urea box 2 through the liquid suction pipe 12 by self suction, and then the urea liquid is conveyed to the urea metering nozzle 9 through the urea liquid supply pipe 7, the urea metering nozzle 9 quantitatively sprays urea solution into the exhaust pipe according to the requirement, and reflux liquid generated in the working process flows back into the urea box 2 through the urea liquid return pipe 14 and the liquid return pipeline 17.
When the device needs to be cleaned, the cleaning pump 4 works, air sucked out of the urea tank 2 by the cleaning pump 4 is pressurized and then enters from the liquid inlet 6a of the urea pump 6, and then is output from the urea liquid return pipe 14 and is blown out to the urea tank 2 through the urea metering nozzle 9 and the urea liquid return pipeline 17 through the urea pump 6 body to the urea liquid supply pipe 7, so that the purpose of cleaning residual urea liquid in the pipeline is achieved. The cleaning pump 4 drives air flow in the urea box 2 to realize internal circulation and further pushes the cleaning of each pipeline.
The second embodiment of the present invention is shown in fig. 2, and one of the differences from the first embodiment of the present invention is that: the urea metering nozzle 9 can be an electric control nozzle, constant pressure liquid is supplied by the urea pump 6, and the metering nozzle 9 controls the injection quantity through the power-on time.
The second embodiment of the present invention is different from the first embodiment in that: the scavenging pump 4 is arranged on the urea pump 6 body and is arranged outside the urea tank 2, and comprises an air inlet 4a and a pressurized air outlet 4b. The air inlet of the scavenging pump 4 is directly opened to the atmosphere, and the pressurized air outlet 4b thereof is connected with the liquid inlet 6a of the urea pump 6.
When the SCR pipeline cleaning device 1 is in a liquid spraying state, the urea pump 6 pumps urea liquid in the urea box 2 through the liquid suction pipe 12 by self suction, and then the urea liquid is conveyed to the urea metering nozzle 9 through the urea liquid supply pipe 7, and the urea metering pump quantitatively sprays urea solution into the exhaust pipe according to the requirement.
When the device needs to be cleaned, the urea pump 6 stops working, but the urea metering nozzle 9 is opened, the cleaning pump 4 starts working, the cleaning pump 4 sucks air and pressurizes the air, then the air enters from the liquid inlet 6a of the urea pump 6, is output from the urea liquid return pipe 14 and passes through the urea pump 6 body to the urea liquid supply pipe 7, and is blown into the exhaust pipe through the urea metering nozzle 9, thereby achieving the purpose of cleaning residual urea liquid in the pipeline
The third embodiment of the present invention is shown in fig. 3, and one of the differences from the first embodiment of the present invention is that: the urea pump 6 is a built-in pump of the urea tank 2 and is fixed on a urea liquid supply module 15, the urea pump 6 penetrates into the bottom of the urea tank 2 along with one end of the module, and a filter screen 20 is arranged at a liquid inlet 6a of the urea pump 6. The urea pump 6 and the filter screen 20 are arranged near the ice melting device 13 in a manner that facilitates thawing, so as to ensure normal liquid supply of the urea pump 6 in a low-temperature environment. The upper end of the supply module 15 is provided with a liquid outlet flow path 21 and a urea liquid outlet nozzle 22 at the top of the urea box 2, the liquid outlet flow path 21 is communicated with the urea pump 6 and the urea liquid outlet nozzle 22, and the urea liquid supply pipe 7 is connected with the urea liquid outlet nozzle 22 and the urea metering nozzle 9.
The second difference between the structural diagram of the third embodiment of the present invention and the structural diagram of the first embodiment of the present invention is that: the cleaning pump 4 is arranged on the supply module 15 and is arranged outside the urea tank 2, and comprises an air inlet 4a and a pressurized air outlet 4b, an air suction pipeline 3 and an air output pipeline 23 are arranged inside the supply module 15, one end of the air suction pipeline 3 is communicated with the upper space of the urea tank 2, and the other end of the air suction pipeline is connected with the air inlet 4a of the cleaning pump 4. One end of the air output pipe 23 is connected to the liquid outlet channel 21, and the other end is connected to the pressurized air outlet 4b of the purge pump 4.
When the SCR pipeline cleaning device 1 is in a liquid spraying state, urea solution filtered by the filter screen 20 is pumped out by the urea pump 6 and is conveyed to the metering nozzle 9 through the liquid outlet flow path 21 and the urea liquid supply pipe 7, the urea metering nozzle 9 quantitatively sprays urea solution into the air inlet and outlet pipes according to the requirement, and reflux liquid generated in the working process flows back into the urea tank 2 through the liquid return joint 16 and the urea liquid return flow path 17.
When the SCR pipeline cleaning device 1 is in a cleaning state, the urea pump 6 stops working, the cleaning pump 4 is started, air is pumped from the upper space of the urea tank 2 through a suction pipeline, pressurized air is input into an air output pipeline 23, and flows through the liquid outlet flow path 21, the urea liquid supply pipe 7, the urea metering nozzle 9, the liquid return joint 16 and the liquid return flow path 17 to return to the urea tank 2, so that urea residual liquid in the urea liquid is cleaned.
The above examples are only for illustrating the essence of the present invention, but do not limit the present invention. Any modifications, simplifications, etc., which do not depart from the principles of the invention, are intended to be included within the scope of the invention.
The invention is not related in part to the same as or can be practiced with the prior art.
Claims (5)
1. The cleaning device for the non-gas-assisted SCR urea pipeline comprises a urea tank, a urea pump, a urea metering nozzle, a urea liquid supply pipe, a urea liquid return pipe and a cleaning pump, and is characterized in that when the urea pipeline needs to be cleaned, the cleaning pump starts to work, and sucked air is blown into the urea pump, the urea liquid supply pipe and the urea metering nozzle after being pressurized, so that liquid urea in the urea tank is discharged to the urea tank; the cleaning pump is an electric diaphragm type air pump; the cleaning pump is arranged outside the urea box and comprises an air inlet and a pressurized air outlet, an air suction pipeline is arranged in the supply module, one end of the air suction pipeline is communicated with the upper space of the urea box, and the other end of the air suction pipeline is connected with the air inlet of the cleaning pump; the pressurized air outlet of the scavenging pump is connected with the liquid inlet of the urea pump, and the air in the upper space of the urea box is pumped into the urea pump from the pressurized air outlet after being pressurized by the scavenging pump; the urea liquid collecting device is characterized in that a liquid return flow path and a urea liquid return connector are arranged on the supply module, a urea liquid return connector is also arranged on the urea metering nozzle, two ends of the urea liquid return pipe are respectively connected with the two urea liquid return connectors, and when the cleaning pump is started, cleaning air sucked from the urea tank and pressurized by the cleaning pump flows through the urea liquid supply pipe, the urea metering nozzle, the urea liquid return connector and the urea liquid return path and returns to the urea tank to clean urea liquid in the urea liquid return pipe.
2. The cleaning device for a non-air assisted SCR urea line of claim 1, wherein the urea pump is an external pump for the urea tank, the urea pump comprises a liquid inlet, a liquid suction pipe is connected to the urea tank and the liquid inlet of the urea pump, the urea liquid return pipe is also arranged between the urea pump and the urea tank, the urea liquid supply pipe is connected to the urea pump and the urea metering nozzle, the cleaning pump is arranged on the urea pump body, and when pressurized air pumped by the cleaning pump enters from the liquid inlet of the urea pump, the urea liquid in the urea pump body is removed when passing through the urea pump body to the urea liquid supply pipe.
3. A cleaning device for non-air assisted SCR urea pipelines as defined in claim 2, wherein a check valve is provided at the pressurized air outlet of the cleaning pump to inhibit urea liquid in the urea liquid supply pipe from flowing back into the cleaning pump.
4. The cleaning device for non-air assisted SCR urea pipeline according to claim 1, wherein the urea pump is a built-in pump of a urea tank, and is fixed on a urea liquid supply module, a liquid outlet flow path and a urea liquid outlet nozzle are arranged on the supply module, the liquid outlet flow path is communicated with the urea pump and the urea liquid outlet nozzle, a urea liquid supply pipe is connected with the urea liquid outlet nozzle and the urea metering nozzle, the cleaning pump is arranged on the supply module, an air suction pipeline and an air output pipeline are arranged inside the supply module, the air suction pipeline is communicated with the upper space of the urea tank, the air output pipeline is communicated with the liquid outlet flow path, and after the cleaning pump is started, urea liquid in the liquid outlet flow path and the urea liquid supply pipe is removed by air sucked from the urea tank.
5. The cleaning apparatus for a non-air assisted SCR urea line as defined in claim 4, wherein a check valve is provided in said air outlet line to inhibit reverse flow of urea solution in said solution outlet path to said cleaning pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811774.0A CN108906794B (en) | 2018-07-23 | 2018-07-23 | Cleaning device for non-gas-assisted SCR urea pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810811774.0A CN108906794B (en) | 2018-07-23 | 2018-07-23 | Cleaning device for non-gas-assisted SCR urea pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108906794A CN108906794A (en) | 2018-11-30 |
| CN108906794B true CN108906794B (en) | 2024-03-26 |
Family
ID=64414747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810811774.0A Active CN108906794B (en) | 2018-07-23 | 2018-07-23 | Cleaning device for non-gas-assisted SCR urea pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108906794B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975495A (en) * | 2019-04-30 | 2019-07-05 | 凯龙高科技股份有限公司 | A kind of integrated form urea level temperature quality sensor |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101048658B1 (en) * | 2010-03-24 | 2011-07-12 | (주)모토닉 | Adjust apparatus and method of urea water solution supply apparatus |
| ZA201202587B (en) * | 2012-04-11 | 2013-01-30 | Albert Jacobs | Sweeping filtration system for a cooling tower |
| CN103352745A (en) * | 2013-06-20 | 2013-10-16 | 厚德融智(北京)云计算技术研究院 | Air assisted type urea pump system |
| CN103949447A (en) * | 2014-04-22 | 2014-07-30 | 中国石油天然气第六建设公司 | Cleaning and oil flushing device and method for unit lubricating oil system pipeline |
| CN104005820A (en) * | 2014-05-19 | 2014-08-27 | 西南交通大学 | Hydraulic pipeline urea evacuation method for vapour-pressure type urea measurement injection system |
| CN105019987A (en) * | 2015-08-03 | 2015-11-04 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering, atomizing and supplying device |
| CN105626205A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Differential pressure type urea pump for SCR exhaust gas after-treatment |
| CN106837489A (en) * | 2017-03-10 | 2017-06-13 | 江苏大学 | A kind of SCR supplies spraying system crystallization prevention device and method |
| CN106837486A (en) * | 2016-12-27 | 2017-06-13 | 潍柴动力空气净化科技有限公司 | Gas helps formula urea injection system and gas to help formula method for urea injection control |
| CN107246302A (en) * | 2017-08-09 | 2017-10-13 | 华中科技大学无锡研究院 | A kind of urea pumping system |
| CN107687358A (en) * | 2016-08-04 | 2018-02-13 | 广州市新力汽车技术有限公司 | The control method of air-assisted gas drive SCR system |
| CN107701272A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
| CN209205954U (en) * | 2018-07-23 | 2019-08-06 | 浙江福爱电子有限公司 | A kind of non-gas helps the clearing apparatus of SCR urea pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004046881A1 (en) * | 2004-09-28 | 2006-04-13 | Robert Bosch Gmbh | Delivery system for a medium, in particular for the treatment of exhaust gases of an internal combustion engine, exhaust gas purification device and method for operating a delivery system |
| DE102009005790B4 (en) * | 2009-01-22 | 2023-05-17 | Albonair Gmbh | dosing system |
-
2018
- 2018-07-23 CN CN201810811774.0A patent/CN108906794B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101048658B1 (en) * | 2010-03-24 | 2011-07-12 | (주)모토닉 | Adjust apparatus and method of urea water solution supply apparatus |
| ZA201202587B (en) * | 2012-04-11 | 2013-01-30 | Albert Jacobs | Sweeping filtration system for a cooling tower |
| CN103352745A (en) * | 2013-06-20 | 2013-10-16 | 厚德融智(北京)云计算技术研究院 | Air assisted type urea pump system |
| CN103949447A (en) * | 2014-04-22 | 2014-07-30 | 中国石油天然气第六建设公司 | Cleaning and oil flushing device and method for unit lubricating oil system pipeline |
| CN104005820A (en) * | 2014-05-19 | 2014-08-27 | 西南交通大学 | Hydraulic pipeline urea evacuation method for vapour-pressure type urea measurement injection system |
| CN105019987A (en) * | 2015-08-03 | 2015-11-04 | 包头北大工道发动机技术有限公司 | Vehicle-mounted urea solution metering, atomizing and supplying device |
| CN105626205A (en) * | 2016-03-15 | 2016-06-01 | 茵卡排放控制系统（江苏）有限公司 | Differential pressure type urea pump for SCR exhaust gas after-treatment |
| CN107687358A (en) * | 2016-08-04 | 2018-02-13 | 广州市新力汽车技术有限公司 | The control method of air-assisted gas drive SCR system |
| CN106837486A (en) * | 2016-12-27 | 2017-06-13 | 潍柴动力空气净化科技有限公司 | Gas helps formula urea injection system and gas to help formula method for urea injection control |
| CN106837489A (en) * | 2017-03-10 | 2017-06-13 | 江苏大学 | A kind of SCR supplies spraying system crystallization prevention device and method |
| CN107246302A (en) * | 2017-08-09 | 2017-10-13 | 华中科技大学无锡研究院 | A kind of urea pumping system |
| CN107701272A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
| CN209205954U (en) * | 2018-07-23 | 2019-08-06 | 浙江福爱电子有限公司 | A kind of non-gas helps the clearing apparatus of SCR urea pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108906794A (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104053873B (en) | Dosing mechanism and dispensing method for the exhaust aftertreatment medium of liquid | |
| CN103975137B (en) | The metering device and metering method of liquid exhaust after-treatment agent | |
| CN102388208B (en) | System and process for storing an additive and injecting it into the exhaust gases of an engine | |
| WO2015154640A1 (en) | Scr injection metering module and control method | |
| CN105986860A (en) | Metering pump nozzle and engine exhaust post-treatment system with same | |
| CN105518266A (en) | Delivery module for use in a gas turbine exhaust gas purification system | |
| US9394818B2 (en) | Delivery unit for a liquid additive, method for operating a delivery unit and motor vehicle having a delivery unit | |
| CN207740067U (en) | A kind of urea pumping system | |
| CN108906794B (en) | Cleaning device for non-gas-assisted SCR urea pipeline | |
| CN101440737A (en) | Method and device for supplying gas for internal combustion engine exhaust gas processing | |
| US20150240683A1 (en) | Reductant supply system | |
| CN208153109U (en) | Urea injection system | |
| CN107476860B (en) | Urea solution supply system | |
| KR101317415B1 (en) | Urea pump module for selective catalyst reduction device | |
| CN113931721A (en) | Engine exhaust hydrocarbon injection system and control strategy thereof | |
| CN209205954U (en) | A kind of non-gas helps the clearing apparatus of SCR urea pipe | |
| CN210858877U (en) | Urea liquid supply module | |
| CN212337506U (en) | Heavy diesel engine high pressure common rail fuel system | |
| CN210289879U (en) | Fuel injection device of DPF regeneration system | |
| CN210858870U (en) | Gas explosion cleaning device of motor vehicle tail gas aftertreatment system | |
| JP6503742B2 (en) | Urea injector | |
| TWI813751B (en) | Internal combustion engine and control system | |
| CN110905633A (en) | Urea liquid supply module | |
| CN213088097U (en) | Novel anti-freezing SCR system | |
| CN220319653U (en) | Prevent cryogenic urea liquid feeding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |