CN110792489B - Urea solution supply system adopting pneumatic double-diaphragm pump - Google Patents
Urea solution supply system adopting pneumatic double-diaphragm pump Download PDFInfo
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- CN110792489B CN110792489B CN201911154787.6A CN201911154787A CN110792489B CN 110792489 B CN110792489 B CN 110792489B CN 201911154787 A CN201911154787 A CN 201911154787A CN 110792489 B CN110792489 B CN 110792489B
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- diaphragm pump
- pneumatic diaphragm
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- urea
- urea solution
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1426—Filtration means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/148—Arrangement of sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1493—Purging the reducing agent out of the conduits or nozzle
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to the field of diesel engine tail gas aftertreatment, and particularly discloses a urea solution supply system adopting a pneumatic double-diaphragm pump. This system includes first pneumatic diaphragm pump, the pneumatic diaphragm pump of second, urea case, air supply and urea nozzle, wherein: the liquid inlet ends of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are communicated and then connected with the urea box through a liquid inlet pipeline, the liquid outlet ends of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are communicated and then divided into two paths, one path is connected with the urea box through a liquid return pipeline, the other path is connected with the urea nozzle through a spraying pipeline, the gas source is divided into two paths, the other path is connected with the gas inlet ends of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump through two-position four-way electromagnetic valves, and the urea solution is blown. In one working cycle, the system is always sucked by one pneumatic diaphragm pump and is extruded by the other pneumatic diaphragm pump, so that the flow pulsation rate of the system is effectively reduced, and the flow stability and the metering precision of the urea solution supply system are improved.
Description
Technical Field
The invention belongs to the field of diesel engine tail gas aftertreatment, and particularly relates to a urea solution supply system adopting a pneumatic double-diaphragm pump.
Background
The exhaust gas sprayed after the combustion of the diesel engine contains a large amount of particulate matters and NOx, and has great threat to the quality of air. The existing internal purification technology cannot completely meet increasingly severe emission standards, so that the internal purification technology has a great application prospect in the aspect of additionally arranging a tail gas post-treatment device on a diesel engine.
At present, the main international technical methods for reducing the NOx emission of diesel vehicles comprise: exhaust Gas Recirculation (EGR), Selective Catalytic Reduction (SCR), NOx adsorption converter (LNT), and the like. The SCR technology has high NOx conversion efficiency, simple engine control, good fuel economy, and relatively easy technology upgrade, and has become a mainstream technical method for internationally reducing NOx emission of diesel vehicles. The SCR technology mainly uses urea solution as a reducing agent to purify NOx in exhaust gas, so the urea solution supply system is one of important components in the exhaust gas aftertreatment of a diesel engine.
In the existing air-assisted urea solution supply system applied in the market, a diaphragm pump driven by a motor or an electromagnet is generally adopted as a system power device, and the urea solution metering is realized by adjusting the rotating speed of the motor or the working frequency of an electromagnetic valve. However, the existing urea solution supply system has the defects of poor reliability, low efficiency, complex control system, narrow flow regulation range and the like.
Disclosure of Invention
In order to overcome the defects or the improvement requirements of the prior art, the invention provides a urea solution supply system adopting a pneumatic double-diaphragm pump, wherein a first pneumatic diaphragm pump and a second pneumatic diaphragm pump, of which the liquid inlet end and the liquid outlet end are communicated with each other, are correspondingly designed by combining the characteristics of the pneumatic diaphragm pump, so that one path of pneumatic diaphragm pump is always sucked and the other path of pneumatic diaphragm pump is extruded in one working cycle, the flow pulsation rate of the system can be correspondingly and effectively reduced, and the flow stability and the metering precision of the system are improved, so that the system is particularly suitable for application occasions of tail gas treatment of diesel engines.
In order to achieve the above object, the present invention provides a urea solution supply system using a pneumatic double diaphragm pump, the system comprising a first pneumatic diaphragm pump, a second pneumatic diaphragm pump, a urea tank, a gas source, and a urea nozzle, wherein:
the liquid inlet ends of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are communicated and then connected with the urea box through a liquid inlet pipeline, the liquid outlet ends of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are communicated and then divided into two paths, one path is connected with the urea box through a liquid return pipeline, the other path is connected with the urea nozzle through a spraying pipeline, so that the urea solution in the urea box is sprayed out from the urea nozzle, meanwhile, the stroke volumes of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump are equal and used for guaranteeing the stability of urea solution supply, the gas source is divided into two paths, one path is connected with the gas inlet ends of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump through two-position four-way solenoid valves respectively so as to provide power for the urea solution, and the other path is connected with the urea nozzle to realize the blowing of the urea solution.
As a further preferred option, a filter is installed on the liquid inlet pipeline and is used for filtering the urea solution.
As a further preferred, install first suction valve and second suction valve respectively on the feed liquor end pipeline of first pneumatic diaphragm pump and second pneumatic diaphragm pump, simultaneously all install first extruding valve and second extruding valve on the play liquid end pipeline of first pneumatic diaphragm pump and second pneumatic diaphragm pump to guarantee first pneumatic diaphragm pump and second pneumatic diaphragm pump are one-way to be pumped urea solution.
As a further preferred, a pressure switch is arranged on the liquid outlet end pipeline of the first pneumatic diaphragm pump and the second pneumatic diaphragm pump, and is used for detecting pipeline pressure.
Further preferably, a pressure sensor is disposed on the injection line for detecting a pressure of the injection line.
Preferably, the injection pipeline is provided with a liquid path back pressure valve for preventing compressed air from entering the liquid path.
Preferably, the gas source is connected with the first electromagnetic switch valve and the pressure reducing valve through connecting pipelines and then divided into two paths, one path is connected with the two-position four-way electromagnetic valve through the second electromagnetic switch valve, and the other path is connected with the injection pipeline through a gas path backpressure valve, so that the urea solution is prevented from entering a gas path.
As a further preferred, a third electromagnetic switch valve is installed on the liquid return pipeline, and is used for evacuating air inside the first pneumatic diaphragm pump and the second pneumatic diaphragm pump.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the invention adopts the pneumatic driving device and the air source to provide power, does not need to additionally install a motor or an electromagnetic driving device, does not need to consider the temperature rise of the motor or the electromagnetic driving, effectively reduces the complexity of a control system, simultaneously adopts the pneumatic diaphragm pump which has the advantages of long service life, high efficiency and wide flow regulation range, can effectively improve the reliability and the application range of the system, particularly adopts the pneumatic double diaphragm pump as a power source, compared with a single-action diaphragm pump, one path of pneumatic diaphragm pump is always sucked in one working cycle, the other path of pneumatic diaphragm pump is extruded out, effectively reduces the pulsation rate of the system flow, improves the stability and the metering precision of the system flow, adopts the air source to be connected with the urea nozzle, mixes the compressed air and the urea solution in the spraying stage, has good atomization effect, and the compressed air can sweep the residual urea solution of the spraying pipeline and the urea nozzle after the spraying is finished, the problems of blockage of an injection pipeline and a urea nozzle are effectively prevented;
2. meanwhile, the stability and the reliability of the urea solution supply system can be effectively improved by optimizing components of each pipeline in the system and arranging the filter, the pressure switch, the pressure sensor, the liquid path back pressure valve and the air path back pressure valve.
Drawings
Fig. 1 is a schematic view of a urea solution supply system using a pneumatic double diaphragm pump constructed in accordance with a preferred embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-urea box, 2-liquid inlet pipeline, 3-filter, 4-first diaphragm pump, 41-first diaphragm, 42-first suction valve, 43-first extrusion valve, 5-second diaphragm pump, 51-second diaphragm pump, 52-second suction valve, 53-second extrusion valve, 6-pressure switch, 7-third electromagnetic switch valve, 8-liquid channel back pressure valve, 9-pressure sensor, 10-gas channel back pressure valve, 11-injection pipeline, 12-pressure reducing valve, 13-first electromagnetic switch valve, 14-urea nozzle, 15-gas source, 16-second electromagnetic switch valve, 17-two-position four-way electromagnetic valve and 18-liquid return pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the embodiment of the present invention provides a urea solution supply system using a pneumatic double diaphragm pump, the system including a first pneumatic diaphragm pump 4, a second pneumatic diaphragm pump 5, a urea tank 1, a gas source 15, and a urea nozzle 14, wherein:
the liquid inlet ends of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5 are communicated and then connected with the urea box 1 through a liquid inlet pipeline 2, the liquid outlet ends of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5 are communicated and then divided into two paths, one path is connected with the urea box 1 through a liquid return pipeline 18, the other path is connected with a urea nozzle 14 through a spraying pipeline 11, so that urea solution in the urea box 1 is sprayed out of the urea nozzle 14, a third electromagnetic switch valve 7 is installed on the liquid return pipeline 18 and used for exhausting air in the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5, and meanwhile, a liquid path back pressure valve 8 is arranged on the spraying pipeline 11 and used for preventing compressed air from entering a liquid path; the stroke volumes of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5 are equal, and one path of suction and one path of extrusion are always performed in one working cycle, so that the flow pulsation rate of the system is reduced, and the flow stability of the system is improved; a first suction valve 42 and a second suction valve 52 are respectively arranged on liquid inlet end pipelines of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5, and a first extrusion valve 43 and a second extrusion valve 53 are respectively arranged on liquid outlet end pipelines of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5, so that the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5 can pump urea solution in one direction;
the air source 15 is connected with the first electromagnetic switch valve 13 and the pressure reducing valve 12 through a connecting pipeline and then divided into two paths, one path is connected with the air inlet ends of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5 respectively after passing through the second electromagnetic switch valve 16 and the two-position four-way electromagnetic valve 17 so as to provide power for the two paths, meanwhile, the first diaphragm 41 and the second diaphragm 51 are arranged in the first diaphragm pump 4 and the second diaphragm pump 5 to separate compressed air and urea solution, the urea solution supply system adopts a pneumatic driving device without additional electrodes or electromagnetic driving devices, and has the advantages of simple control, convenient maintenance, wide flow regulation range and high system efficiency, the other path is connected with the injection pipeline 11 through the air path back pressure valve 10 and then connected with the urea nozzle 14, the urea solution is prevented from entering the air path and simultaneously realizing the purging of the urea solution, and the compressed air always passes through the urea nozzle 14 when working, the blockage problem of the injection pipeline 11 and the urea nozzle 14 can be effectively prevented, and the reliability of the system is improved.
Further, install filter 3 on the liquid inlet pipe way 2 for filter urea solution, thereby avoid impurity to cause its inefficacy in getting into first diaphragm pump 4 and the second diaphragm pump 5, and keep the inside cleanness of urea solution feed system.
Further, the liquid outlet end pipelines of the first pneumatic diaphragm pump 4 and the second pneumatic diaphragm pump 5 are provided with pressure switches 6 for detecting whether the first diaphragm pump 4 and the second diaphragm pump 5 successfully evacuate air in the pipelines and establish liquid path pressure in the initial working process, and system faults can be pre-judged.
Further, a pressure sensor 9 is provided on the injection line 11 for detecting the pressure of the injection line 11.
The operation of the urea solution supply system using the pneumatic double diaphragm pump according to the present invention will be described in detail.
The working process of the urea solution supply system provided by the invention is divided into four modes, namely a pressure building mode, an injection mode, an emptying mode and a shutdown mode, wherein in the pressure building mode, a first electromagnetic switch valve 13, a second electromagnetic switch valve 16 and a third electromagnetic switch valve 7 are simultaneously powered on, a two-position four-way electromagnetic valve 17 works according to the maximum frequency, a first diaphragm pump 4 and a second diaphragm pump 5 suck urea solution from a urea box 1 and return to the urea box 1, the system runs for a period of time to exhaust air in a pipeline, at the end of the period, the third electromagnetic switch valve 7 is powered off, a liquid return pipeline 18 is closed, when a pressure switch 6 detects that the system pressure reaches a preset value, the pressure building of the system is successful, the two-position four-way electromagnetic valve 17 is powered off, and the urea solution supply system is ready to carry out the injection mode; in the injection mode, the two-position four-way electromagnetic valve 17 works according to the required frequency, at the moment, the first electromagnetic switch valve 13 and the second electromagnetic switch valve 16 are continuously electrified, the first diaphragm pump 4 and the second diaphragm pump 5 pump the urea solution to the liquid path backpressure valve 8 to be mixed with the compressed air, and the mixture of the compressed air and the urea solution is sprayed into the catalyst through the injection pipeline 11 and the urea nozzle 14; in an emptying mode, the second electromagnetic switch valve 16 and the two-position four-way electromagnetic valve 17 are powered off simultaneously, the compressed air empties the residual urea solution from the injection pipeline 11, the urea solution in the pipeline is drained after a period of time in the emptying stage, the first electromagnetic switch valve 13 is powered off, and the system is closed; in the shutdown mode, the urea solution supply system is in a shutdown state.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (8)
1. A urea solution feeding system using a pneumatic double diaphragm pump, characterized in that the system comprises a first pneumatic diaphragm pump (4), a second pneumatic diaphragm pump (5), a urea tank (1), an air source (15) and a urea nozzle (14), wherein: the liquid inlet ends of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5) are communicated and then connected with the urea box (1) through a liquid inlet pipeline (2), the liquid outlet ends of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5) are communicated and then divided into two paths, one path is connected with the urea box (1) through a liquid return pipeline (18), the other path is connected with the urea nozzle (14) through a spraying pipeline (11), so that urea solution in the urea box (1) is sprayed out from the urea nozzle (14), meanwhile, the stroke volumes of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5) are equal, the stability of urea solution supply is ensured, the air source (15) is divided into two paths, and one path is respectively connected with the gas inlet ends of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5) through a two-position four-way electromagnetic valve (17), thereby providing power for the urea solution, and the other path is connected with the urea nozzle (14) to realize the purging of the urea solution.
2. A urea solution feeding system with a pneumatic double diaphragm pump according to claim 1, characterized in that a filter (3) is installed on the liquid inlet line (2) for filtering the urea solution.
3. The urea solution feeding system using a pneumatic double diaphragm pump according to claim 1, wherein a first suction valve (42) and a second suction valve (52) are respectively installed on the inlet end pipes of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5), and a first extrusion valve (43) and a second extrusion valve (53) are respectively installed on the outlet end pipes of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5), so as to ensure that the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5) pump the urea solution in one direction.
4. The urea solution feeding system using a pneumatic double diaphragm pump according to claim 1, wherein a pressure switch (6) is provided on the liquid outlet side piping of the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5) for detecting the piping pressure.
5. A urea solution feeding system with a pneumatic double diaphragm pump according to claim 1, characterized in that said injection line (11) is provided with a pressure sensor (9) for detecting the pressure of said injection line (11).
6. A urea solution feeding system using a pneumatic double diaphragm pump according to claim 1, characterized in that a liquid path back pressure valve (8) is provided on said injection line (11) for preventing compressed air from entering the liquid path.
7. The urea solution supply system using a pneumatic double diaphragm pump according to claim 1, wherein the gas source (15) is connected to the first solenoid switch valve (13) and the pressure reducing valve (12) through connecting lines and then divided into two paths, one path is connected to the two-position four-way solenoid valve (17) through the second solenoid switch valve (16), and the other path is connected to the injection line (11) through the gas path back pressure valve (10), thereby preventing the urea solution from entering the gas path.
8. A urea solution feeding system with a pneumatic double diaphragm pump according to any of claims 1 to 7, characterized in that a third electromagnetic on-off valve (7) is installed on the return line (18) for evacuating the air inside the first pneumatic diaphragm pump (4) and the second pneumatic diaphragm pump (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911154787.6A CN110792489B (en) | 2019-11-22 | 2019-11-22 | Urea solution supply system adopting pneumatic double-diaphragm pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911154787.6A CN110792489B (en) | 2019-11-22 | 2019-11-22 | Urea solution supply system adopting pneumatic double-diaphragm pump |
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| CN110792489A CN110792489A (en) | 2020-02-14 |
| CN110792489B true CN110792489B (en) | 2020-10-30 |
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| CN111569653A (en) * | 2020-05-09 | 2020-08-25 | 江苏科技大学 | Urea supply module based on marine exhaust denitration system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100852459B1 (en) * | 2007-02-12 | 2008-08-18 | 정영옥 | Cleaning & removing equipment for sludge and substance between inclined plate at clarifier |
| EP2157295A1 (en) * | 2008-08-21 | 2010-02-24 | Robert Bosch GmbH | Metering system for a fluid medium, in particular urea-water solution |
| CN202768118U (en) * | 2012-07-17 | 2013-03-06 | 金浩 | Selective catalytic reduction (SCR) air auxiliary type injection system based on pneumatic diaphragm pump |
| DE102012207181A1 (en) * | 2012-04-30 | 2013-10-31 | Robert Bosch Gmbh | Diaphragm pump for use as metering device, for conveying e.g. aqueous urea water solution, for exhaust gas after-treatment device in motor car, has working piston whose end is connected with membrane based on deformation |
| DE102012210631A1 (en) * | 2012-06-22 | 2013-12-24 | Robert Bosch Gmbh | Dosing system for injecting a reducing agent into an exhaust pipe of an internal combustion engine |
| EP2505804B1 (en) * | 2011-03-28 | 2015-09-09 | Robert Bosch GmbH | Metering system for a fluid medium, in particular urea-water solution |
| CN107476860A (en) * | 2017-09-15 | 2017-12-15 | 华中科技大学无锡研究院 | A kind of urea liquid feed system |
| CN207740067U (en) * | 2017-08-09 | 2018-08-17 | 华中科技大学无锡研究院 | A kind of urea pumping system |
| DE102017218418A1 (en) * | 2017-10-16 | 2019-04-18 | Robert Bosch Gmbh | Tank, arrangement for the aftertreatment of the exhaust gas of an internal combustion engine with such a tank and operating method |
-
2019
- 2019-11-22 CN CN201911154787.6A patent/CN110792489B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100852459B1 (en) * | 2007-02-12 | 2008-08-18 | 정영옥 | Cleaning & removing equipment for sludge and substance between inclined plate at clarifier |
| EP2157295A1 (en) * | 2008-08-21 | 2010-02-24 | Robert Bosch GmbH | Metering system for a fluid medium, in particular urea-water solution |
| EP2505804B1 (en) * | 2011-03-28 | 2015-09-09 | Robert Bosch GmbH | Metering system for a fluid medium, in particular urea-water solution |
| DE102012207181A1 (en) * | 2012-04-30 | 2013-10-31 | Robert Bosch Gmbh | Diaphragm pump for use as metering device, for conveying e.g. aqueous urea water solution, for exhaust gas after-treatment device in motor car, has working piston whose end is connected with membrane based on deformation |
| DE102012210631A1 (en) * | 2012-06-22 | 2013-12-24 | Robert Bosch Gmbh | Dosing system for injecting a reducing agent into an exhaust pipe of an internal combustion engine |
| CN202768118U (en) * | 2012-07-17 | 2013-03-06 | 金浩 | Selective catalytic reduction (SCR) air auxiliary type injection system based on pneumatic diaphragm pump |
| CN207740067U (en) * | 2017-08-09 | 2018-08-17 | 华中科技大学无锡研究院 | A kind of urea pumping system |
| CN107476860A (en) * | 2017-09-15 | 2017-12-15 | 华中科技大学无锡研究院 | A kind of urea liquid feed system |
| DE102017218418A1 (en) * | 2017-10-16 | 2019-04-18 | Robert Bosch Gmbh | Tank, arrangement for the aftertreatment of the exhaust gas of an internal combustion engine with such a tank and operating method |
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| CN110792489A (en) | 2020-02-14 |
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