KR20130078515A - Soot blower eject nozzle for ship - Google Patents

Soot blower eject nozzle for ship Download PDF

Info

Publication number
KR20130078515A
KR20130078515A KR1020110147509A KR20110147509A KR20130078515A KR 20130078515 A KR20130078515 A KR 20130078515A KR 1020110147509 A KR1020110147509 A KR 1020110147509A KR 20110147509 A KR20110147509 A KR 20110147509A KR 20130078515 A KR20130078515 A KR 20130078515A
Authority
KR
South Korea
Prior art keywords
injection
nozzle
injection hole
soot blower
hole
Prior art date
Application number
KR1020110147509A
Other languages
Korean (ko)
Inventor
김경재
한승한
조영진
Original Assignee
현대비앤지스틸 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 현대비앤지스틸 주식회사 filed Critical 현대비앤지스틸 주식회사
Priority to KR1020110147509A priority Critical patent/KR20130078515A/en
Publication of KR20130078515A publication Critical patent/KR20130078515A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • 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
    • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • 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

Abstract

A marine soot blow nozzle is disclosed. Ship soot blower injection nozzle according to an embodiment of the present invention is a soot blower having a filter module integrally mounted with a plurality of unit block filters arranged in a matrix; And an injection nozzle including an injection nozzle having a central injection hole opened toward the rear center of the unit block filter and a side injection hole spaced outwardly from the center injection hole.

Description

Soot blower eject nozzle for ship

The present invention relates to an injection nozzle, and more particularly, to a block filter in which particulate matter (particulate matter) and soot, ammonium sulfate, etc. contained in exhaust gas discharged from a marine engine are adsorbed, It relates to a marine soot blower injection nozzle for injecting steam to maintain the optimum performance of the block filter.

In general, exhaust gas has various air pollutants, and a technology for reducing nitrogen oxides in the air pollutants has not been established yet.

Nitrogen oxide reduction technologies developed or developed so far are improved combustion method by low temperature multistage combustion method and method of directly reducing nitrogen oxide in the process using low concentration NOx combustor, selective catalytic reduction method (SCR) and selective non-catalyst There is a reduction method (SNCR). Recently, a technology for reducing NOx by using an electric discharge, an electron beam, X-ray, plasma, etc. has been researched and developed.

The improvement of the combustion method or the use of low concentration NOx combustor is a method of directly reducing nitrogen oxide in the process, so the installation and operation cost is low, but it is fundamentally limited to the application of NOx.

The selective non-catalytic reduction method does not use a catalyst and reduces NOx by injecting ammonia into the exhaust gas or combustion convection zone at a molar concentration ratio (NH3: NOx = 1: 1 or 2: 1) at a reaction temperature of 900 to 1000 ° C. Reduction efficiency is 40-60% by the method. The selective non-catalytic reduction method is inexpensive to install and thus useful nitrogen oxide reduction method, but there are many difficulties in operation such as the appropriate amount of NH3 injection and maintaining the proper reaction temperature.

The selective catalytic reduction method has used ammonia as a reducing agent so far, and a technique for reducing NOx using hydrocarbons has recently been researched and developed.

Selective catalytic reduction is a technique for converting NOx to N2 using a reducing agent such as NH3, CO, hydrocarbons and the like under a catalyst. Selective catalytic reduction has been developed to commercial nitrogen oxide treatment technology with high reliability and high purification efficiency.

The selective catalytic reduction method is a NOx reduction technique using a catalyst. The catalyst is largely classified into a metal oxide catalyst and a zeolite, and is classified into a hydrocarbon reaction method and an ammonia reaction method depending on the reducing agent.

Selective catalytic reduction is an effective nitrogen oxide treatment facility and commercialized as a system suitable for treating nitrogen oxides emitted from automobiles and ships as well as incinerators and power plants. However, the soot produced by incomplete combustion of fuel and various ash contained in the exhaust gas are deposited on the catalyst, which is a main part of the selective catalytic reduction method, to block the gas flow passage of the catalytic reactor, thereby reducing the flow of exhaust gas. It acts as a factor causing the pressure drop by interfering with it.

In addition, the sulfur component contained in the combustion fuel forms water-soluble sulfide by combining with alkali metal and is discharged together with soot. When combined with moisture, it is fixed on the catalyst to cover the active point on the surface of the catalyst or elute the active component to remove nitrogen oxides. It may cause the drop.

A conventional soot blower installed in a ship will be described with reference to the drawings.

Referring to FIG. 1, the economizer 20 is installed on a flow path through which waste gas is discharged, and a soot blower 22 is positioned at one side, and a plurality of injections are performed along the length direction of the soot blower 22. A nozzle (not shown) is installed and includes a steam opening / closing valve 23 which opens and closes to supply steam to the soot blower 22.

And the inlet and outlet of the economizer 20 is provided with a thermometer (Thermometer, 24), respectively, is provided with a manometer (Manometer, 25) to check the pressure difference between the inlet and outlet of the economizer (20).

Therefore, when the temperature difference between the inlet and the outlet of the economizer 20 decreases, and the pressure difference increases, the steam opening / closing valve 23 is opened to supply steam to the soot blower 22 through the injection nozzle of the soot blower 22. Steam is removed by removing the soot stuck on the heat exchanger tube 21 of the economizer 20.

However, the soot blower 22 used as described above simply does not implement additional functions in addition to the function of injecting steam into the economizer 20 through the injection nozzle, which causes a problem that it is difficult to easily remove a large amount of the soot.

In addition, the injection nozzle has a problem that a stable injection to the soot blower 22 does not occur as the steam injected from a plurality of opening injection holes interfere with each other and overlap each other.

Republic of Korea Patent Registration 10-1053517 (Published: July 27, 2011)

Embodiments of the present invention are to change the structure of the injection nozzle installed in the soot blower to provide a marine soot blower nozzle having no loss of compressed air, easy to remove the contaminants stacked in the unit block filter.

According to an aspect of the present invention, a plurality of unit block filters are arranged in a matrix array soot blower having a filter module integrally mounted; And an injection nozzle including an injection nozzle having a central injection hole opened toward the rear center of the unit block filter and a side injection hole spaced outwardly from the center injection hole.

The injection nozzle comprises a nozzle header in which the central injection hole and the side injection hole are formed; And a body portion extending toward the rear of the nozzle header and coupled to the spraying portion.

The nozzle header may be a flat portion having a central injection hole located in the center and having a flat surface; It includes an inclined portion having a side injecting hole has an inclined surface inclined upward toward the rear of the flat portion, wherein the side injection holes are spaced at equal intervals in the diagonal direction with respect to the center injection hole, characterized in that spaced apart.

The side injection holes are first, second side injection holes spaced apart in the upper left and right diagonal directions with respect to the center injection hole; It includes a third, fourth side injection hole spaced apart in the lower left, right diagonal direction based on the central injection hole.

The side injection hole is characterized in that the top, bottom, left, right symmetrical arrangement with respect to the center injection hole.

The central injection hole covers a central area having a predetermined size among the entire rear area of the block filter, and the side injection hole covers each corner area and a part of the central area of the entire rear area of the unit block filter. It is done.

The nozzle header is characterized in that the inclination angle of the inclined portion is inclined at an angle within a minimum of 10 ° to a maximum of 45 °.

The central injection hole and the side injection hole is characterized in that having a diameter within a minimum of 0.5mm to a maximum of 1.5mm.

The spraying unit extends toward the inside of the soot blower and extends in the row direction of the unit block filter, respectively; It includes a branch pipe located outside the soot blower and connected to a plurality of injection pipes.

Embodiments of the present invention can effectively remove the contaminants deposited on the unit block filter through the injection nozzle, and can prevent the occurrence of unnecessary dead zone in the unit block filter to reduce the back pressure generation of the soot blower. have.

Embodiments of the present invention can prevent the loss of compressed air by injecting the interference of the compressed air injected through the unit block filter is minimized.

1 is a view schematically showing a conventional marine soot blower.
2 is a perspective view showing a filter module according to an embodiment of the present invention.
Figure 3 is a perspective view showing a state in which a soot blower injection nozzle for ships according to an embodiment of the present invention is installed.
Figure 4 (a) is a view showing a rear view of the soot blower is equipped with a spray nozzle according to an embodiment of the present invention, (b) is a view showing a plan view.
Figure 5 is a longitudinal cross-sectional view of the soot blow injection nozzle for ships according to an embodiment of the present invention.
Figure 6 is a plan view of a soot blow injection nozzle for ships according to an embodiment of the present invention.
FIG. 7 is a view illustrating a rear region of a unit block filter covered by compressed air injected by a marine soot blower injection nozzle according to an exemplary embodiment of the present invention. FIG.
8 to 9 is a state of use of the soot blow injection nozzle for ships according to an embodiment of the present invention.
Figure 10 (a) is a view showing a marine soot blower injection nozzle injection state according to an embodiment of the present invention, (b) is compared to the injection nozzle of the present invention according to the same separation distance of the conventional injection nozzle Figure showing a comparison of the spray area.
Figure 11 (a) is a view showing the injection state of the marine soot blower injection nozzle according to an embodiment of the present invention, (b) is the same injection area of the conventional injection nozzle compared to the injection nozzle of the present invention Figure comparing the injection distance according to.

A soot blower injection nozzle for ships according to an embodiment of the present invention will be described with reference to the drawings. Figure 2 is a perspective view showing a filter module according to an embodiment of the present invention, Figure 3 is a perspective view showing a state in which a soot blower injection nozzle for ships according to an embodiment of the present invention is installed.

2 to 3, the soot blower injection nozzle according to the exemplary embodiment of the present invention is arranged in the soot blower 100 in a matrix of the filter module 120 in which a plurality of unit block filters 110 are mounted. Is installed in the rear, the injection having a central injection hole 220 opened toward the center of the rear of the unit block filter 110 and the side injection hole 230 spaced outward with respect to the central injection hole 220 It includes a spray unit 200 is provided with a nozzle 210.

The unit block filter 110 has a size corresponding to the inside of the divided filter module 120 and the filter 111 is installed therein. The filter 111 may include platinum (Pt, platinum), rhodium (Rh, rhodium), zeolite, vanadium on the surface of the filter 111 to adsorb particulate matter and soot in the exhaust gas. A coating layer including any one of (V, vanadium) is formed.

The filter 111 is prefabricated into an insertable size inside the rectangular filter housing 112, and then inserted into the filter housing 112 and then fixed by brazing welding.

In the filter module 120 according to the present embodiment, all nine unit block filters 110 may be installed in the form of 3 * 3. The number of unit block filters 110 installed in) may be changed. In addition, the filter module 120 and the unit block filter 110 are fixed in close contact with each other by a fixing member provided separately.

A soot blower according to an embodiment of the present invention and an injection unit installed in the soot blower will be described with reference to the drawings.

3 to 4 (a) to (b), the soot blower 100 has a plurality of unit block filters 110 mounted on the filter module 120 as described above. The filter module is bolted to the front and rear respectively via the soot blower housing 102 between each other.

The injection unit 200 includes a branch pipe 250 extending from the outside of the soot blower 100 to the inside of the soot blower housing 102 and the injection pipe 240 provided with the above-described injection nozzle 210. The branch pipe 250 includes a first branch pipe 253, a second branch pipe 252, and a third injection pipe 251.

The arrangement of the injection pipe and the injection nozzle provided in the injection pipe according to an embodiment of the present invention will be described.

Referring to FIG. 5, since all nine unit blocks are installed in the filter module 120 in the form of 3 * 3, all three injection pipes (when viewed from the rear of the filter module 120) 240 is installed to be located at the center spaced apart a predetermined distance to the rear of the unit block filter 110.

In addition, the injection nozzle 210 is installed in the injection pipe 240 to be positioned in the center of the back of each unit block filter 110.

The injection nozzle 210 includes a nozzle header 212 and a body 214, and the nozzle header 212 is formed with a central injection hole 220 and a side injection hole 230.

The nozzle header 212 has a flat surface portion 212a having a center spray hole 220 in the center and a flat surface, and a side spray hole 230 having an inclined surface inclined upward toward the rear of the flat portion 212a. Inclined portion 212b.

The reason why the nozzle header 212 has the inclined portion 212b according to the present embodiment is that the compressed air injected from the side injection holes 230 does not interfere with or overlap each other to reach the unit block filter 110. This is to keep the air volume constant at all times. As a result, the unit block filter 110 is sprayed in a state in which the compressed air injected through the injection nozzle 210 is not generated and the initial injection pressure is maintained, so that the particulate matter laminated to the unit block filter 110 is formed. Or ash is removed more efficiently.

Body portion 214 is threaded along the longitudinal direction in order to be coupled to the injection pipe 240, helix is coupled to the opening hole 241 opened in the injection pipe 240. The body portion 214 includes a flow passage 214a communicated with the inside of the nozzle header 212 therein, and the high pressure compressed air supplied through the injection pipe 240 through the flow passage 214a receives the nozzle header. Supplied to 212.

The flow path 214a is formed to extend toward the nozzle header 212 so that air is supplied to the side injection hole 230, and no specific dimension is limited.

The nozzle header 212 is inclined at an angle in which the inclination angle θ of the inclined portion 212b is at least 10 ° to at most 45 °. The inclination angle θ may vary according to the size of the unit block filter 110. As the size of the unit block filter 110 is smaller, the inclination angle θ is decreased, and the size of the unit block filter 110 is increased. As it is larger, the inclination angle θ is increased.

The inclination angle θ is proportional to the radiation angle of air injected through the side injection hole 230, and the larger the inclination angle θ, the greater the radiation angle injected outward through the side injection hole 230. Therefore, when the size of the unit block filter 110 is large, the fabrication is performed by designing the inclination angle θ of the side injection hole 230 at the maximum inclination angle. What is necessary is just to design and manufacture by the inclination-angle (theta).

The center injection hole 220 and the side injection hole 230 is made of a diameter within a minimum of 0.5mm to a maximum of 1.5mm. In addition, the diameter of the central injection hole 220 and the side injection hole 230 may be different.

An arrangement state of side injection holes according to an embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 6, the side injection holes 230 may include first and second side injection holes 231 and 232 spaced apart from each other in the upper left and right diagonal directions with respect to the central injection hole 220 and the central injection hole ( 220, the third and fourth side injection holes 233 and 234 spaced apart from each other in the lower left and right diagonal directions.

The first to fourth side injection holes 231, 232, 233, and 234 are all spaced diagonally with the same separation distance d based on the central injection hole 220.

The side injection holes 230 are disposed symmetrically with respect to the top, bottom, left, and right sides of the center injection hole 220. The reason for this arrangement is that the separation distance d or the position of any one of the first to fourth side injection holes 231, 232, 233, and 234 is toward the unit block filter 110 when the position is not located at the symmetrical position. This is to prevent the phenomenon that the injection angle of the compressed air to be injected is changed to prevent the injection to the unit block filter 110 accurately.

Referring to FIG. 7, the central injection hole 220 according to the present exemplary embodiment covers the central area C having a predetermined size among the entire rear area of the block filter 110 and the side injection hole 230. Covers each corner region and a portion of the central region of the entire rear region of the unit block filter 110 at the same time.

In more detail, when the high pressure compressed air is injected toward the unit filter module 110 through the central injection hole 220, the central injection hole 220 is the unit block filter 110 as shown in a circular shape. An area is formed to remove particulate matter and soot that are stacked on the substrate), and the area corresponds to the central area (C). Therefore, when compressed air is injected to the outside of the injection nozzle 210 through the central injection hole 220, the particulate matter with respect to the area corresponding to the central region C of the rectangular unit filter module 110 is stable. Can be removed.

In addition, the area covered by the first side injection hole 231 may remove the particulate matter while the upper left corner region S1 and the central region C of the unit block filter 110 overlap with each other. have.

The area covered by the second side injection hole 232 may remove the particulate matter while the upper right corner region S2 and the center region C of the unit block filter 110 overlap each other.

The area covered by the third side injection hole 233 overlaps a part of the lower left corner area S3 of the unit block filter 110 and the center area C, and is formed by the fourth side injection hole 234. The covered area may be removed to remove particulate matter while the lower right corner region S4 and the central region C of the unit block filter 110 overlap each other.

Therefore, the injection nozzle 210 according to the present invention can inject high pressure compressed air to all regions of the unit block filter 110 without any loss, thereby removing the removal of particulate matter more reliably.

A state of use of the soot blower injection nozzle for ships according to the embodiment of the present invention configured as described above will be described with reference to the accompanying drawings.

8 to 9, when the engine E installed in the ship is operated, the exhaust gas discharged from the engine E may have a large amount of particulate matter and ash through the exhaust pipe 10 soot blower 100. Is moved towards.

The high pressure compressed air supplied from the air tank (not shown) is sprayed after being supplied to the plurality of injection pipes 240 installed in the soot blower 100 through the first to third branch pipes 253, 252 and 251 at a predetermined pressure. It is sprayed through the center injection hole 220 and the side injection hole 30 formed in the nozzle 210 is injected directly to the rear center, left and right corners of the unit block filter 110 is stacked on the unit block filter 110 Removes harmful substances and soot.

The soot blower injection nozzle and the conventional soot blower injection nozzle according to one embodiment of the present invention will be described with reference to the drawings. For reference, the experimental conditions were compared with the area (A) that the compressed air injected from each injection nozzle (210, 30) reaches the filter 40 while maintaining the separation distance (d) the same.

10 (a) to 10 (b), the injection nozzle 210 according to an embodiment of the present invention faces the filter 40 while maintaining the separation distance d shown in the drawing. When compressed air is injected, the area A covered by the compressed air injected through the central injection hole 220 and the side injection hole 230 is shown in the state shown in the drawing.

In contrast, when the compressed air is injected through the injection hole 32 while maintaining the same separation distance d using the conventional injection nozzle 30, the area A 'to cover the injection nozzle of the present invention. It can be seen that the reference numeral 210 becomes relatively smaller than the area A to cover.

In addition, looking at the movement trajectory of the compressed air injected through the conventional injection nozzle 30, it can be seen that the flow of the individual compressed air injected toward the front through the injection hole 32 interferes or overlaps with each other, causing unnecessary loss. Can be.

Therefore, it can be seen that the injection nozzle 210 according to the present embodiment covers a relatively large area when the compressed air is injected to the filter 40 at the same separation distance d.

The soot blower injection nozzle and the conventional soot blower injection nozzle according to one embodiment of the present invention will be compared and explained in the state of maintaining the same area, respectively.

Referring to (a) to (b) of FIG. 11, the conventional injection nozzle 30 has a separation distance d 'when the injection area A is the same as the present invention. It can be seen that the relative increase compared to d).

Therefore, the injection nozzle 210 according to the present invention can be a compact design of the soot blower because the separation distance (d) is relatively short compared to the conventional injection nozzle (30).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: suit blower
110: unit block filter
120: filter module
200:
210: injection nozzle
212: nozzle header
212a: flat part
212b: slope
214 body
220: central injection hole
230: side injection hole
240: injection pipe
250: branch pipe

Claims (9)

A soot blower having a filter module in which a plurality of unit block filters are arranged in a matrix; And
And a spraying part having a spraying nozzle having a center spraying hole opened toward the center of a rear surface of the unit block filter and a side spraying hole spaced outwardly from the center spraying hole. The method according to claim 1,
The spray nozzle
A nozzle header in which the center injection hole and the side injection hole are formed;
A soot blow injection nozzle for ships comprising a body portion extending toward the rear of the nozzle header and coupled to the injection portion. The method of claim 2,
The nozzle header
A planar part of which the central injection hole is located at the center and formed of a plane;
It includes an inclined portion having a side injection hole has a slope inclined upward toward the rear of the flat portion,
The side injection hole is a soot blow injection nozzle for ships, characterized in that spaced apart at equal intervals in the diagonal direction with respect to the center injection hole. The method of claim 3,
The side injection hole,
First and second side injection holes spaced apart from each other in the upper left and right diagonal directions with respect to the central injection hole;
Soot blower injection nozzle for a ship comprising a third, fourth side injection hole spaced in the lower left and right diagonal direction with respect to the central injection hole. The method of claim 3,
The side injection hole,
Soot blower injection nozzle for ships, characterized in that the upper, lower, left, right symmetrically arranged based on the central injection hole. The method according to claim 1,
The central injection hole covers a central region having a predetermined size of the entire rear region of the block filter,
The side injection hole is a soot blow injection nozzle for a ship, characterized in that for covering the corners and a part of the central region of the entire rear area of the unit block filter. The method of claim 3,
The nozzle header,
The soot blow injection nozzle for ships, characterized in that the inclination angle of the inclined portion is inclined at an angle within a minimum of 10 ° to a maximum of 45 °. The method according to claim 1,
The center injection hole and the side injection hole is a marine soot blow nozzle injection nozzle, characterized in that having a diameter within a maximum of 0.5mm. The method according to claim 1,
The injection unit
An injection tube extending toward the inside of the soot blower and extending in a row direction of the unit block filter, and having injection nozzles installed therein;
A soot blower injection nozzle for ships located on the outside of the soot blower and including a branch pipe connected to a plurality of injection pipes.
KR1020110147509A 2011-12-30 2011-12-30 Soot blower eject nozzle for ship KR20130078515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110147509A KR20130078515A (en) 2011-12-30 2011-12-30 Soot blower eject nozzle for ship

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110147509A KR20130078515A (en) 2011-12-30 2011-12-30 Soot blower eject nozzle for ship

Publications (1)

Publication Number Publication Date
KR20130078515A true KR20130078515A (en) 2013-07-10

Family

ID=48991446

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110147509A KR20130078515A (en) 2011-12-30 2011-12-30 Soot blower eject nozzle for ship

Country Status (1)

Country Link
KR (1) KR20130078515A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112807902A (en) * 2021-01-05 2021-05-18 雷刚 Green is water spray dust collecting equipment for construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112807902A (en) * 2021-01-05 2021-05-18 雷刚 Green is water spray dust collecting equipment for construction
CN112807902B (en) * 2021-01-05 2023-11-24 重庆天舟建筑有限公司 Water spray dust collecting equipment for green construction

Similar Documents

Publication Publication Date Title
US8079211B2 (en) Bypass purge for protecting against formation of reductant deposits
US11465108B2 (en) Dosing and mixing arrangement for use in exhaust aftertreatment
CN103270266B (en) Exhaust line of motor vehicle
US9976470B2 (en) Aftertreatment module having replaceable catalyst housing
RU127405U1 (en) EXHAUST GAS TREATMENT SYSTEM CONTAINING A LIQUID JET SPRAY
US10767527B2 (en) Exhaust system for a combustion engine
US20200032692A1 (en) Mixer and Exhaust Aftertreatment System
CN104271914A (en) Emissions cleaning module
KR101608720B1 (en) Exhaust gas purification system
JP2009156077A (en) Exhaust emission control device for internal combustion engine
JP2009062928A (en) Additive distribution board structure for exhaust passage
KR102150227B1 (en) Catalyst Integrated Dust Collector with Ammonia Injection
KR102150213B1 (en) Catalyst Integrated Dust Collector
KR20130078515A (en) Soot blower eject nozzle for ship
KR20180076685A (en) DeSOx and DeNOx system
JP2018112183A (en) Exhaust gas aftertreatment system and internal combustion engine
KR102232267B1 (en) An apparatus for reducing nitrogen oxide
KR101684624B1 (en) Catalytic Reactor with rotating typed catalyst cleaner
KR20170063120A (en) Selective catalytic reduction reactor
KR20220066641A (en) Reaction for selective catalytic reduction
KR102602501B1 (en) Reactor for selective catalytic reduction
KR101353942B1 (en) Exhaust gas filter assembly for ship
KR102158731B1 (en) Exhaust gas cleaning device
KR20130049285A (en) Method for exhaust gas cleaning soot blower of ship engine and cleaning apparatus for exhaust gas cleaning soot blower of ship engine
KR102398490B1 (en) Complex removing system for air contaminant

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application