KR101678836B1 - Urea dosing apparatus for handling exhaust gas for auxiliary engine of ship - Google Patents

Urea dosing apparatus for handling exhaust gas for auxiliary engine of ship Download PDF

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Publication number
KR101678836B1
KR101678836B1 KR1020150101155A KR20150101155A KR101678836B1 KR 101678836 B1 KR101678836 B1 KR 101678836B1 KR 1020150101155 A KR1020150101155 A KR 1020150101155A KR 20150101155 A KR20150101155 A KR 20150101155A KR 101678836 B1 KR101678836 B1 KR 101678836B1
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KR
South Korea
Prior art keywords
urea water
air
flow pipe
pressure
pipe member
Prior art date
Application number
KR1020150101155A
Other languages
Korean (ko)
Inventor
이창희
Original Assignee
학교법인 송원대학교
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Priority to KR1020150101155A priority Critical patent/KR101678836B1/en
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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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • 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]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • 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
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1808—Pressure
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1821—Injector parameters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ocean & Marine Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A urea injection apparatus for an engine exhaust gas treatment vessel is disclosed.
The urea water injection apparatus for an engine for treating a marine vessel disclosed in the present invention comprises: a urea water supply tank member to which urea can be supplied for injection; A urea water flow pipe member in which the urea water flows for injection in the urea water supply tank member; A urea water pressure sensing member for sensing a pressure of the urea water flowing along the urea water pipe member; An air supply tank member through which air can be supplied for injection; An air flow pipe member in which the air flows for injection in the air supply tank member; An air adjusting member for adjusting the pressure of the air in the air flow pipe member according to the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member; And an injection nozzle in which the air flowing along the air flow pipe member at a pressure controlled by the air adjusting member and the urea water flowing along the urea water flow pipe member are mixed and injected.
According to the marine vessel engine exhaust gas treatment water injection apparatus disclosed in the publication, the urea water injection apparatus for treating marine vessel engine exhaust gas includes a urea water supply tank member, a urea water flow pipe member, a urea water pressure sensing member, Wherein the air regulating member includes a supply tank member, an air flow pipe member, an air regulating member, and an injection nozzle, wherein the air regulating member flows through the air flow pipe member, Wherein the pressure of the air supplied through the air flow pipe member in the air supply tank member and the pressure of the air flowing through the urea water flow pipe detected by the urea water pressure sensing member are reduced by returning the air to the air supply tank member through the air return pipe member, So that the pressure difference of the pressure of the number of the elements in the member can be adjusted to the predetermined required pressure difference And, there is an advantage that can prevent the air consumption is not increased even if the flow rate of the urea water reduced accordingly.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a Urea dosing apparatus for handling exhaust gas,

The present invention relates to a urea water injection device for treating a marine engine exhaust gas.

In order to minimize the environmental pollution caused by the exhaust gas generated during the operation of the marine vessel engine, the marine vessel engine is used as an exhaust gas Is injected with urea containing ammonia for nitrogen oxide treatment.

The following documents can be presented as patent documents related to the exhaust gas treatment of such a marine vessel engine.

However, according to the conventional umbrella-type urea water treatment injecting apparatus for injecting urea water, the urea water and air are mixed and injected through the two-phase nozzle. When the flow rate of the urea water is reduced, There is a problem that the air pressure increases and the air consumption increases.

In addition, when the ship viewing engine is not used for a long period of time, the urea water hardens in the pipe due to the sintering phenomenon, thereby causing a smooth flow of urea water.

Published Japanese Patent Application No. 10-2014-0077231, published on June 24, 2014, entitled " Exhaust gas purifier " Registered Patent No. 10-1180961, Date of Registration: September 3, 2012. Title of the Invention: Internal combustion engine system for ships and exhaust gas purification system suitable thereto Registered Patent No. 10-0836261, Date of Registration: June 02, 2008 Title of Invention: Burner for regenerating diesel engine exhaust gas filter device and diesel engine exhaust filter device using the same Registered Patent No. 10-1022018, Registered Date: Mar 07, 2011 Title of the Invention: Exhaust gas purifying system for engines and marine engine including the same

An object of the present invention is to provide a urea water injecting apparatus for treating a marine vessel engine exhaust gas which can prevent an increase in air consumption even when the flow rate of urea water is reduced.

It is another object of the present invention to provide a urea water injection apparatus for exhaust gas treatment of a marine vessel engine, in which sintering of urea water can be prevented even if the marine vessel engine is not used for a long period of time.

A urea water injection device for treating a marine vessel engine exhaust gas according to one aspect of the present invention includes a urea water supply tank member to which urea can be supplied for injection; A urea water flow pipe member in which the urea water flows for injection in the urea water supply tank member; A urea water pressure sensing member for sensing a pressure of the urea water flowing along the urea water pipe member; An air supply tank member through which air can be supplied for injection; An air flow pipe member in which the air flows for injection in the air supply tank member; An air adjusting member for adjusting the pressure of the air in the air flow pipe member according to the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member; And an injection nozzle in which the air flowing along the air flow pipe member at a pressure controlled by the air adjusting member and the urea water flowing along the urea water flow pipe member are mixed and injected.

According to one aspect of the present invention, there is provided a urea water injection apparatus for treating exhaust gas of a marine vessel engine, comprising a urea water supply tank member, a urea water flow pipe member, A portion of the air flowing through the air flow pipe member and passing through the air flow control member is discharged to the outside through the sensing member, the air supply tank member, the air flow pipe member, the air adjusting member, The air flow regulating member is returned to the air supply tank member through the air return pipe member so that the pressure of the air supplied through the air flow pipe member in the air supply tank member and the pressure of the air The pressure difference of the pressure of the urea water in the urea water flow tube member is equal to the predetermined required pressure difference So that it is possible to prevent the amount of air consumption from being increased even if the flow rate of the urea water is reduced accordingly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a urea water injecting apparatus for treating a marine vessel engine exhaust gas according to a first embodiment of the present invention; FIG.
2 is a view showing a configuration of a urea water injecting apparatus for treating exhaust gas of a ship viewing engine according to a second embodiment of the present invention.
3 is a view showing a configuration of a urea water injecting apparatus for treating exhaust gas of a ship viewing engine according to a third embodiment of the present invention.

Hereinafter, the urea water injecting apparatus for treating exhaust gas of a marine vessel engine according to embodiments of the present invention will be described with reference to the drawings.

1 is a view showing a configuration of a urea water injecting apparatus for treating exhaust gas of a ship viewing engine according to a first embodiment of the present invention.

Referring to FIG. 1, the urea water injection apparatus 100 for exhausting a marine vessel engine exhaust gas according to the present embodiment includes a urea water supply tank member 110, a urea water flow pipe member 115, An air flow pipe member 135, an air regulating member 150, and an injection nozzle 105. The air flow control member 150 includes a member 151, an air supply tank member 130, an air flow pipe member 135,

The urea water supply tank member 110 is accommodated in urea and can be supplied for injection.

The urea water flow pipe member 115 flows in the urea water supply tank member 110 toward the injection nozzle 105 for injection of the urea water.

Reference numeral 120 denotes a urea water supply pump installed on the urea water flow pipe member 115 and numeral 125 denotes a part of urea water from the urea water supply pump 120 toward the urea water supply tank member 110 Is a urea water reflux pipe member capable of refluxing the urea water.

The urea water pressure sensing member 151 senses a pressure of the urea water flowing along the urea water flow pipe member 115. A pressure sensing sensor or the like applied to the urea water flow pipe member 115 Can be presented.

The air supply tank member 130 is configured such that air can be received and supplied for injection.

The air flow pipe member 135 is such that the air in the air supply tank member 130 flows toward the injection nozzle 105 for injection.

The air regulating member 150 is installed on the air flow pipe member 135 and detects the pressure of the urea water flowing in the urea water flow pipe member 115 sensed by the urea water pressure sensing member 151 By adjusting the pressure of the air in the air flow pipe member 135, a flow rate control valve or the like can be given as an example.

The pressure sensing value of the urea water sensed by the urea water pressure sensing member 151 is transmitted to the air conditioning member 150 and the pressure sensing value of the urea water is transmitted to the air conditioning member 150, Adjusts the pressure of the air flowing along the air flow pipe member 135. [

The air regulating member 150 is provided with an air return pipe member 155 capable of refluxing part of the air from the air regulating member 150 to the air supply tank member 130 .

The injection nozzle 105 is connected to the air flow pipe member 135 and the urea water flow pipe member 115 so that the air flow pipe member 135 is connected to the air flow pipe member 135 at a pressure regulated by the air adjusting member 150, And the urea water flowing along the urea water flow pipe member 115 is mixed and injected.

In the urea water injection apparatus 100 for a marine vessel engine exhaust gas treatment configured as described above, the pressure of the air supplied through the air flow pipe member 135 from the air supply tank member 130 and the pressure of the urea water pressure When the pressure difference of the pressure of the urea water in the urea water flow pipe member 115 sensed by the member 151 is equal to or larger than a predetermined required pressure difference, 135) and the pressure of the urea water in the urea water flow pipe member (115) sensed by the urea water pressure sensing member (151) is greater than the pressure difference between the predetermined required pressure difference A portion of the air flowing through the air flow conduit member 135 and passing through the air regulating member 150 is guided by the air regulating member 150 to the upper And is returned to the air supply tank member 130 through the air return pipe member 155.

Hereinafter, the urea water injection apparatus 100 for treating a marine vessel engine exhaust gas according to the present embodiment will be described with reference to the drawings.

The urea water pressure sensing member 151 is moved along the urea water supply pipe member 115 while the urea water is flowing through the urea water supply tank member 110 in accordance with the operation of the urea water supply pump 120. [ The pressure of the urea water flowing as described above is sensed.

Meanwhile, in the air supply tank member 130, the air flows through the air flow pipe member 135 and flows into the air conditioning member 150.

Using the pressure sensing value of the urea water delivered to the air regulating member 150, the air regulating member 150 is supplied through the air flow pipe member 135 from the air supply tank member 130 The pressure difference between the pressure of the air and the pressure of the urea water in the urea water flow pipe member 115 sensed by the urea water pressure sensing member 151 is calculated, The air regulating member 150 flows through the air flow pipe member 155 to a part of the air flowing through the air regulating member 150 through the air flow pipe member 135, The pressure of the air supplied through the air flow pipe member 135 from the air supply tank member 130 to the pressure of the urea water pressure sensing member 130, The number of the elements detected in 151 is able to have a pressure difference between the pressure of the urea water in the flow tube member 115, be fitted to the pressure difference required for the preset.

The air whose pressure has been adjusted as described above flows through the air flow pipe member 135 and is mixed with the urea water that has flowed through the urea water flow pipe member 115 and flows through the injection nozzle 105 .

As described above, the umbrella-viewing engine exhaust gas treatment urea water injection apparatus 100 includes the urea water supply tank member 110, the urea water flow pipe member 115, the urea water pressure sensing member 151, The air flowing through the air flow pipe member 135 and flowing through the air flow pipe member 135 as it includes the air supply tank member 130, the air flow pipe member 135, the air conditioning member 150 and the injection nozzle 105, A part of the air passing through the regulating member 150 is refluxed to the air supply tank member 130 through the air return pipe member 155 so that the air supply tank member 130), and a pressure difference between the pressure of the air supplied through the air flow pipe member (135) and the pressure of the urea water in the urea water flow pipe member (115) sensed by the urea water pressure sensing member Lt; RTI ID = 0.0 > So that the amount of air consumption can be prevented from increasing even if the flow rate of the urea water is reduced.

Hereinafter, a urea water injection apparatus for treating exhaust gas of a ship viewing engine according to another embodiment of the present invention will be described with reference to the drawings. In carrying out these explanations, the description overlapping with the contents already described in the first embodiment of the present invention described above will be replaced by them, and will not be described here.

2 is a view showing a configuration of a urea water injecting apparatus for treating exhaust gas of a ship viewing engine according to a second embodiment of the present invention.

Referring to FIG. 2, the urea water injection apparatus 200 for a ship viewing engine exhaust gas treatment according to the present embodiment includes a water supply member 260 for supplying water into the urea water flow pipe member 215 do.

The water supply member 260 may be a water supply pump or the like.

Reference numeral 265 denotes a water supply pipe member that connects the water supply member 260 and the urea water flow pipe member 215 and reference numeral 261 denotes an on-off valve that can open and close the water supply pipe member 265 .

When it is determined that the supply amount of urea water through the urea water flow pipe member 215 is reduced through sensing by the urea water pressure sensing member 251, Supplies water into the urea water flow tube member 215 by a reduced supply amount of the urea water. The pressure of the air supplied through the air flow pipe member 235 in the air supply tank member 230 and the pressure of the urea water in the urea water flow pipe member 215 sensed by the urea water pressure sensing member 251 The sintering of the urea water in the urea water flow pipe member 215 and the like can be prevented even if the ship viewing engine is not used for a long period of time do.

3 is a view showing a configuration of a urea water injecting apparatus for treating exhaust gas of a ship viewing engine according to a third embodiment of the present invention.

Referring to FIG. 3, the urea water injecting apparatus for treating exhaust gas of a ship viewing engine according to the present embodiment can be applied as it is in the first embodiment, except for the following description.

In the present embodiment, a plurality of ship viewing engines are provided, and a plurality of injection nozzles 305 are formed, thereby constituting a plurality of urea water flow pipe members 315 and air flow pipe members 335, respectively.

A plurality of urea water branch pipe members 316 are connected between the urea water flow pipe member 315 and each of the injection nozzles 305 and connected to the respective injection nozzles 305, A urea water distributor 301 for connecting the water pipe member 316 and the urea water pipe member 315 is applied.

A plurality of air branch pipe members 336 connected to the respective injection nozzles 305 are provided between the air flow pipe member 335 and the respective injection nozzles 305, And the air branch pipe 302 connecting the air flow pipe member 335 are applied.

Reference numeral 375 denotes a flow rate sensor for sensing the flow rate of each of the elementary number branch pipe members 316. Reference numeral 370 denotes a flow rate control valve for controlling the flow rates of the respective elementary branch pipe members 316.

The opening degree of each flow control valve 370 is adjusted according to the branch flow rate of the number of elements detected by the flow sensor 375, The flow rate can be adjusted appropriately to the required flow rate.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the following claims And can be changed. However, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

According to one aspect of the present invention, the urea water injection device for treating exhaust gas of a marine vessel engine can prevent an increase in the amount of air consumption even if the flow rate of urea water is reduced. Even if the marine vessel engine is not used for a long period of time, And therefore, it is highly likely to be used industrially.

100: Vessel view Elements injection equipment for engine exhaust treatment
105: injection nozzle 110: urea water supply tank member
115: Urea water flow pipe member 130: Air supply tank member
135: air flow pipe member 150: air adjusting member
151: Urea water pressure sensing member

Claims (4)

delete A urea water supply tank member in which urea can be supplied for injection;
A urea water flow pipe member in which the urea water flows for injection in the urea water supply tank member;
A urea water pressure sensing member for sensing a pressure of the urea water flowing along the urea water pipe member;
An air supply tank member through which air can be supplied for injection;
An air flow pipe member in which the air flows for injection in the air supply tank member;
An air adjusting member for adjusting the pressure of the air in the air flow pipe member according to the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member;
An injection nozzle in which the air flowing along the air flow pipe member at a pressure controlled by the air adjusting member and the urea water flowing along the urea water flow pipe member are mixed and injected; And
And an air return pipe member capable of refluxing part of the air from the air adjusting member to the air supply tank member,
Wherein the pressure difference between the pressure of the air supplied through the air flow pipe member in the air supply tank member and the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member is less than a predetermined pressure The difference in pressure between the pressure of the air supplied through the air flow pipe member in the air supply tank member and the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member, Wherein the air regulating member flows through the air flow pipe member and passes through the air regulating member so that the air regulating member can pass through the air return pipe member to the air supply tank member, For refining the exhaust gas. Urea water injection device. delete A urea water supply tank member in which urea can be supplied for injection;
A urea water flow pipe member in which the urea water flows for injection in the urea water supply tank member;
A urea water pressure sensing member for sensing a pressure of the urea water flowing along the urea water pipe member;
An air supply tank member through which air can be supplied for injection;
An air flow pipe member in which the air flows for injection in the air supply tank member;
An air adjusting member for adjusting the pressure of the air in the air flow pipe member according to the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member;
An injection nozzle in which the air flowing along the air flow pipe member at a pressure controlled by the air adjusting member and the urea water flowing along the urea water flow pipe member are mixed and injected; And
And a water supply member capable of supplying water into the urea water flow pipe member,
When it is determined that the supply amount of the urea water through the urea water flow pipe member is reduced through sensing by the urea water pressure sensing member, the air supplied from the air supply tank member through the air flow pipe member And the pressure difference of the pressure of the urea water in the urea water flow pipe member sensed by the urea water pressure sensing member can be adjusted to a predetermined required pressure difference, Wherein the water supply unit supplies water into the urea water flow pipe member by a supply amount of the urea water.
KR1020150101155A 2015-07-16 2015-07-16 Urea dosing apparatus for handling exhaust gas for auxiliary engine of ship KR101678836B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114645760A (en) * 2022-02-28 2022-06-21 东风商用车有限公司 Air-assisted urea nozzle blockage diagnosis system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100839949B1 (en) 2007-01-17 2008-06-20 (주)모토닉 Dosing system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100839949B1 (en) 2007-01-17 2008-06-20 (주)모토닉 Dosing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114645760A (en) * 2022-02-28 2022-06-21 东风商用车有限公司 Air-assisted urea nozzle blockage diagnosis system and method

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