WO2021027327A1 - 一种船用scr系统反应器导流装置 - Google Patents

一种船用scr系统反应器导流装置 Download PDF

Info

Publication number
WO2021027327A1
WO2021027327A1 PCT/CN2020/087228 CN2020087228W WO2021027327A1 WO 2021027327 A1 WO2021027327 A1 WO 2021027327A1 CN 2020087228 W CN2020087228 W CN 2020087228W WO 2021027327 A1 WO2021027327 A1 WO 2021027327A1
Authority
WO
WIPO (PCT)
Prior art keywords
inlet
outlet
flow guide
flow
ring
Prior art date
Application number
PCT/CN2020/087228
Other languages
English (en)
French (fr)
Inventor
杜军
陈伟
郑喜洋
李若男
吴鑫
赵航
薛亚菲
Original Assignee
江苏科技大学
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 江苏科技大学 filed Critical 江苏科技大学
Priority to KR1020207014045A priority Critical patent/KR102317275B1/ko
Publication of WO2021027327A1 publication Critical patent/WO2021027327A1/zh

Links

Images

Classifications

    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • 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

Definitions

  • the invention belongs to a reactor flow guiding device, and in particular relates to a marine SCR system reactor flow guiding device.
  • SCR Selective catalytic reduction technology
  • the gas guiding device in the expansion chamber of the front section of the reactor is very important, which directly affects the denitration efficiency and the service life of the catalyst.
  • the objective of the present invention is to provide a marine SCR system reactor flow guide device, the device outlet flow rate is uniform, pressure loss is small, on the basis of ensuring the normal operation of the SCR system, to ensure that the mixed gas through the pipe diameter from small to large During the process, the mixed gas at different positions can enter the catalyst layer of the reactor at the same speed, which effectively solves the problem of uneven flow velocity of the exhaust gas entering the catalyst pores.
  • the present invention is a marine SCR system reactor flow guide device, which is installed in a square-circular expansion cavity at the reactor inlet, and includes a hollow truncated cone-shaped inner flow guide tube.
  • An inlet flow guide ring, an intermediate flow guide ring and an outlet flow guide ring are provided coaxially with the inner flow guide cylinder, and there is a certain gap between the middle flow guide ring and the inlet flow guide ring and the outlet flow guide ring respectively, so
  • the side of the inlet deflector ring is provided with a plurality of groups of inlet deflector plates corresponding to the position of the inner deflector, the inlet deflector plates are distributed on the side of the inlet deflector ring in an annular array, and the inlet de
  • the space between the outer conical surface of the inner deflector and the inlet deflector ring, the intermediate deflector ring, and the outlet deflector ring is divided into groups of first regions with the same volume by groups of inner deflector plates;
  • the space between the inner wall of the expansion chamber where the inlet of the reactor is connected to the circle and the inlet flow guide ring, the middle flow guide ring and the outlet flow guide ring are divided into multiple sets of second regions with the same volume by multiple sets of inlet splitter plates and outlet splitter plates
  • the cavity of the inner deflector is the third area; the inlet and outlet area ratio of any one of the first areas in the plurality of groups, the inlet and outlet area ratio of any one of the second areas in the plurality of groups
  • the area ratio of the entrance and exit of the third area is equal, and the area of any one of the first areas in the plurality of groups of the first area, the area of any second area of the plurality of second areas in the plane perpendicular to the axis of the inner
  • the inlet and outlet splitter plate and the inner flow plate divide the square-circular expansion cavity of the reactor inlet into a plurality of areas of equal area in the circumferential direction, and the constant velocity mixed gas enters the first area, the second area and the second area with equal inlet and outlet area ratios.
  • the three zones ensure that the exhaust gas entering the square reactor is uniform and constant.
  • the inlet flow guide ring and the outlet flow guide ring are respectively located at both ends of the inner flow dividing plate, and the number of intermediate flow guide rings between the inlet flow guide ring and the outlet flow guide ring is one or more.
  • the number of intermediate guide rings varies with the size of the guide device.
  • the dimensions of the inlet flow guide ring, the middle flow guide ring and the outlet flow guide ring gradually increase in order, and the inlet flow guide ring, the middle flow guide ring and the outlet flow guide ring are all tapered curved surfaces.
  • Conical surface structure, coaxial arrangement, effectively reduces airflow resistance and pressure loss; the side surface of the inner deflector and the side surface of the deflector ring with a gap in the middle are all coaxial tapered surfaces, forming a multilayer curved structure , Reduce the disturbance of the exhaust gas flow, and improve the radial unevenness of the flow.
  • the size of the inlet manifold is larger than the size of the outlet manifold.
  • multiple sets of the inner flow dividing plates are all arranged perpendicular to the outer conical surface of the inner flow guide tube, multiple sets of inlet flow dividing plates are arranged perpendicular to the side of the inlet flow guiding ring, and multiple sets of outlet flow dividing plates and the side of the outlet flow guiding ring Vertical setting.
  • the inlet and outlet splitter plate and the inner flow plate divide the multi-layer curved structure into a plurality of areas of equal area in the circumferential direction, reduce the mutual disturbance of the airflow in the circumferential direction, and improve the circumferential unevenness of the exhaust gas airflow.
  • inlet splitter plate and the corresponding inner splitter plate are on the same plane, and the outlet splitter plate and the corresponding inner splitter plate are on the same plane.
  • multiple sets of the inlet splitter plates and multiple sets of outlet splitter plates are in a one-to-one correspondence and are arranged in parallel.
  • multiple sets of the inlet splitter plates and multiple sets of outlet splitter plates are all welded to the inner wall of the expansion cavity connected to the reactor inlet square.
  • the inlet flow guide ring, the middle flow guide ring and the outlet flow guide ring are all conical curved surfaces and arranged coaxially, which effectively reduces airflow resistance and pressure loss;
  • the sides of the deflector ring with a gap in the middle are all coaxial tapered surfaces, forming a multi-layer curved structure, reducing the disturbance of the exhaust gas flow, and improving the radial unevenness of the air flow;
  • the inlet and outlet flow dividers and the inner flow divider are multi-layered
  • the curved structure is divided into a number of circumferential areas of equal area to reduce the mutual disturbance of the airflow in the circumferential direction and improve the circumferential non-uniformity of the exhaust gas airflow;
  • the equal velocity mixed gas enters the first area with the same inlet and outlet area ratio,
  • the second zone and the third zone ensure that the exhaust gas entering the square reactor is uniform and constant.
  • Figure 1 is a schematic diagram of the structure of the present invention
  • Figure 2 is an axial view of the invention
  • Figure 3 is a sectional view of the present invention.
  • Figure 4 is a front view of Figure 3;
  • Figure 5 is a schematic diagram of the internal flow plate structure
  • Figure 6 is a top view of the present invention.
  • Figure 7 is a bottom view of the present invention.
  • Figure 8 is a schematic diagram of the present invention installed in the square connecting circle of the reactor inlet.
  • a marine SCR system reactor flow guide device of the present invention is installed in the expansion cavity of the reactor inlet side to the circle 11, and the size of the components in the device needs to be connected to the reactor inlet side.
  • the size of the expansion cavity of the circle 11 is customized to ensure that the diversion device can make the exhaust gas outlet flow rate uniformly enter the catalyst layer for different specifications of reactors.
  • the device includes the hollow truncated cone-shaped internal diversion tube 1 and the internal diversion tube 1
  • the outer conical surface is provided with a plurality of sets of inner flow dividers 2 distributed in an annular array.
  • the inner flow deflector 1 and sets of inner flow dividers 2 are integrally formed, and the plurality of sets of inner flow dividers 2 are all connected with the outer conical surface of the inner flow deflector 1 Vertically arranged, multiple sets of inner flow dividing plates 2 are all stepped, and the multiple sets of inner flow dividing plates 2 are fixedly sleeved with an inlet flow guide ring 3, an intermediate flow guide ring 4 and an outlet flow guide that are coaxially arranged with the inner flow guide tube 1
  • the dimensions of ring 5, inlet guide ring 3, middle guide ring 4 and outlet guide ring 5 gradually increase, and the inlet guide ring 3, middle guide ring 4 and outlet guide ring 5 are all tapered curved structures , Conical surface structure, coaxial arrangement, effectively reduce the air flow resistance and reduce the pressure loss;
  • the inlet flow guide ring 3 and the outlet flow guide ring 5 are respectively located at the two ends of the inner flow dividing plate 2, and the middle flow guide ring 4 is between the inlet flow guide ring 3 and the outlet flow guide ring 5 respectively There is a certain gap, and the number of intermediate guide rings 4 between the inlet guide ring 3 and the outlet guide ring 5 is one or more.
  • the specific number of the intermediate guide rings 4 varies with the size of the guide device.
  • the adjacent intermediate diversion rings 4 of the plurality of intermediate diversion rings 4 also have a certain gap.
  • the number of intermediate diversion rings 4 is one, and the internal diversion rings 4
  • the sides of the cylinder 1 and the inlet guide ring 3, the middle guide ring 4 and the outlet guide ring 5 with gaps in the middle are all coaxial tapered surfaces, forming a multi-layer curved structure, which can reduce the disturbance of the exhaust gas flow. Improve the radial unevenness of airflow;
  • the side of the inlet deflector ring 3 is provided with a plurality of groups of inlet deflector plates 6 corresponding to the position of the inner deflector 2, and the plural groups of inlet deflector plates 6 are arranged perpendicular to the side of the inlet deflector ring 3, and the groups of inlet deflector plates 6 are annular
  • the array is distributed on the side of the inlet deflector ring 3 and the inlet deflector 6 and the inlet deflector ring 3 are integrally formed.
  • the inlet deflector 6 and the corresponding inner deflector 2 are on the same plane, and the side of the outlet deflector ring 5 is provided with multiple Set of outlet splitter plates 7 corresponding to the position of the inner splitter plate 2, multiple sets of outlet splitter plates 7 are arranged perpendicular to the side of the outlet deflector ring 5, and multiple sets of outlet splitter plates 7 are distributed on the side of the outlet deflector ring 5 in an annular array And the outlet splitter plate 7 and the outlet guide ring 5 are integrally formed, the outlet splitter plate 7 and the corresponding inner splitter plate 2 are in the same plane, the size of the inlet splitter plate 6 is larger than the size of the outlet splitter plate 7, and multiple sets of inlet splitter The plate 6 and the multiple sets of outlet splitter plates 7 are arranged in a one-to-one correspondence and are arranged in parallel; the inlet and outlet splitter plates and the inner splitter plate 2 divide the multi-layer curved structure into a plurality of circumferential areas of equal area, reducing the
  • the space between the outer conical surface of the inner deflector cylinder 1 and the inlet deflector ring 3, the intermediate deflector ring 4 and the outlet deflector ring 5 is divided into multiple groups of inner deflector plates 2
  • the first area 8 with the same group volume; the space between the inner wall of the expansion cavity of the reactor inlet square and the circle 11 and the inlet deflector ring 3, the intermediate deflector ring 4 and the outlet deflector ring 5 are divided by multiple groups of inlet divider plates 6 and
  • the outlet splitter plate 7 is divided into multiple sets of second regions 9 with the same volume, and multiple sets of inlet splitter plates 6 and multiple sets of outlet splitter plates 7 are welded to the inner wall of the expansion cavity of the reactor inlet square connection circle 11; the internal flow deflector 1
  • the cavity of is the third region 10; the entrance and exit area ratio of any one of the first regions 8 in the multiple groups of first regions 8, the entrance and exit area ratio of any second region 9 in the multiple sets of second regions 9 and the third region
  • the main driving force of a ship is a low-speed diesel engine with a rated power of 13,200kW and a rated speed of 111r/min.
  • the expansion chamber inlet of the reactor inlet is connected to the circle 11 through the flange and the square connection circle. 13 and ⁇ 720 DN700 flange 12 are connected to the mixing pipeline, the outlet size of the reactor inlet square connection circle 11 is 1376 ⁇ 1348 connected to the reactor square inlet, the expansion ratio is about 4.56;
  • the diesel engine exhaust gas flows from the flange 12 and the flange
  • the section 13 between the square and the circle enters the expansion chamber of the square and circle 11 at the entrance of the reactor. Without this device, the gas is equivalent to the process of increasing the diameter of the pipe. At this time, the speed at different positions will change, so that The performance of the reactor drops;
  • This device is to ensure that the pipe diameter becomes larger, and the mixed gas at different positions can enter the catalyst layer of the reactor at the same speed.
  • the flow ring 5 is welded at the coaxial position by the inner flow plate 2, and then the inlet flow plate 6 and the outlet flow plate 7 are welded to the inner wall of the expansion chamber of the reactor inlet square connection circle 11, and the inner flow guide cylinder 1 has a gap between the sides and the middle
  • the sides of the inlet guide ring 3, the middle guide ring 4 and the outlet guide ring 5 are all coaxial tapered surfaces, thus forming a multi-layer curved structure, that is, the expansion cavity is radially divided into a multi-layer curved structure, reducing The disturbance of the small exhaust gas flow improves the radial non-uniformity of the air flow.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

一种船用SCR系统反应器导流装置，装置安装于反应器进口方接圆（11）的扩张腔中，包括空心圆锥台形状的内部导流筒（1），内部导流筒（1）的外圆锥面上设有多组呈环形阵列分布的内部分流板（2），内部导流筒（1）与多组内部分流板（2）一体成型，多组内部分流板（2）均呈阶梯状，多组内部分流板（2）上固定套设有与内部导流筒（1）同轴设置的进口导流环（3）、中间导流环（4）和出口导流环（5）。内部导流筒（1）的侧面和中间具有间隙的导流环的侧面均为同轴锥形面，形成多层曲面结构；进出口分流板和内部分流板（2）将多层曲面结构划分为周向的多个等面积的区域。

Description

一种船用SCR系统反应器导流装置 技术领域
本发明属于反应器导流装置，具体涉及一种船用SCR系统反应器导流装置。
背景技术
选择性催化还原技术(SCR)是船用柴油机NOx排放后处理的主流技术，衡量SCR脱硝系统性能的两个重要指标是脱硝效率和NH 3的逃逸率。这两个指标受诸多因素的综合影响，其中之一就是从扩张腔进入SCR反应器催化剂层的混合气体的出口速度均匀程度。没有气体导流装置，混合气体相当于经过管径由小变大的过程，这时不同位置的速度会发生变化，如果废气进入催化剂孔道的流速不均匀，那么速度过高的区域会有部分废气来不及反应就被排出，而速度过低区域的催化能力得不到充分利用，从而使反应器的性能下降。因此，反应器前段扩张腔内的气体导流装置至关重要，直接影响到脱硝效率和催化剂的使用寿命。
发明内容
发明目的：本发明目的是提供一种船用SCR系统反应器导流装置，该装置出口流速均匀，压力损失小，能在确保SCR系统正常运行基础上，保证混合气体经过管径由小变大的过程，不同位置处的混合气体能速度一致的进入反应器的催化剂层，有效解决了废气进入催化剂孔道的流速不均匀的问题。
技术方案：本发明一种船用SCR系统反应器导流装置，所述装置安装于反应器进口方接圆的扩张腔中，包括空心圆锥台形状的内部导流筒，所述内部导流筒的外圆锥面上设有多组呈环形阵列分布的内部分流板，内部导流筒与多组内部分流板一体成型，多组所述内部分流板均呈阶梯状，多组内部分流板上固定套设有与内部导流筒同轴设置的进口导流环、中间导流环和出口导流环，所述中间导流环分别与进口导流环和出口导流环之间具有一定间隙，所述进口导流环的侧面设有多组与内部分流板位置相对应的进口分流板，所述进口分流板呈环形阵列分布在进口导流环的侧面且进口分流板与进口导流环一体成型，所述出口导流环的侧面设有多组与内部分流板位置相对应的出口分流板，所述出口分流板呈环形阵列分布在出口导流环的侧面且出口分流板与出口导流环一体成型。
进一步的，所述内部导流筒的外圆锥面与进口导流环、中间导流环和出口导流环之间的空间被多组内部分流板分割成多组体积相同的第一区域；所述反应器进口方接圆的扩张腔内壁与进口导流环、中间导流环和出口导流环之间的空间被多组进口分流板和出口分流板分割成多组体积相同的第二区域；所述内部导流筒 的空腔为第三区域；多组所述第一区域中任意一个第一区域的进出口面积比、多组第二区域中任意一个第二区域的进出口面积比和第三区域的进出口面积比均相等，且垂直于内部导流筒轴线平面内的多组第一区域中任意一个第一区域的面积、多组第二区域中任意一个第二区域面积和第三区域的面积均相等。进出口分流板和内部分流板将反应器进口方接圆扩张腔划分为周向的多个等面积的区域，等速度混合气体分别进入进出口面积比相等的第一区域、第二区域和第三区域，保证进入方形反应器的废气是均匀等速度的。
进一步的，所述进口导流环和出口导流环分别位于内部分流板的两端，且进口导流环和出口导流环之间的中间导流环数量为一或多个。中间导流环的数量随着导流装置的大小而变化。
进一步的，多个所述中间导流环中相邻的中间导流环之间具有一定间隙。
进一步的，所述进口导流环、中间导流环和出口导流环的尺寸依次逐渐递增，且进口导流环、中间导流环和出口导流环均为锥形曲面结构。锥形曲面结构，同轴布置，有效降低了气流阻力，减小了压力损失；内部导流筒的侧面和中间具有间隙的导流环的侧面均为同轴锥形面，形成多层曲面结构，减小废气气流的扰动，改善气流的径向不均匀性。
进一步的，所述进口分流板的尺寸大于出口分流板的尺寸。
进一步的，多组所述内部分流板均与内部导流筒的外圆锥面垂直设置，多组进口分流板与进口导流环的侧面垂直设置，多组出口分流板与出口导流环的侧面垂直设置。进出口分流板和内部分流板将多层曲面结构划分为周向的多个等面积的区域，减小气流在周向上的相互扰动，改善废气气流的周向不均匀性。
进一步的，所述进口分流板与相对应的内部分流板处于同一平面，所述出口分流板与相对应的内部分流板处于同一平面。
进一步的，多组所述进口分流板与多组出口分流板均一一对应且平行设置。
进一步的，多组所述进口分流板和多组出口分流板均与反应器进口方接圆的扩张腔内壁焊接。
有益效果：本发明中进口导流环、中间导流环和出口导流环均为锥形曲面结构，同轴布置，有效降低了气流阻力，减小了压力损失；内部导流筒的侧面和中间具有间隙的导流环的侧面均为同轴锥形面，形成多层曲面结构，减小废气气流的扰动，改善气流的径向不均匀性；进出口分流板和内部分流板将多层曲面结构划分为周向的多个等面积的区域，减小气流在周向上的相互扰动，改善废气气流的周向不均匀性；等速度混合气体分别进入进出口面积比相等的第一区域、第二 区域和第三区域，保证进入方形反应器的废气是均匀等速度的。
附图说明
图1为本发明结构示意图；
图2为本发明轴视图；
图3为本发明剖视图；
图4为图3主视图；
图5为内部分流板结构示意图；
图6为本发明俯视图；
图7为本发明仰视图；
图8为本发明安装于反应器进口方接圆内示意图。
具体实施例
下面结合附图和实施例对本发明做进一步描述：
如图1和图2所示，本发明一种船用SCR系统反应器导流装置，该装置安装于反应器进口方接圆11的扩张腔中，装置中各部件尺寸需要与反应器进口方接圆11的扩张腔尺寸来定制，保证导流装置可以针对不同规格反应器使废气出口流速均匀的进入催化剂层，其中该装置包括空心圆锥台形状的内部导流筒1，内部导流筒1的外圆锥面上设有多组呈环形阵列分布的内部分流板2，内部导流筒1与多组内部分流板2一体成型，多组内部分流板2均与内部导流筒1的外圆锥面垂直设置，多组内部分流板2均呈阶梯状，多组内部分流板2上固定套设有与内部导流筒1同轴设置的进口导流环3、中间导流环4和出口导流环5，进口导流环3、中间导流环4和出口导流环5的尺寸依次逐渐递增，且进口导流环3、中间导流环4和出口导流环5均为锥形曲面结构，锥形曲面结构，同轴布置，有效降低了气流阻力，减小了压力损失；
如图3至图5所示，进口导流环3和出口导流环5分别位于内部分流板2的两端，中间导流环4分别与进口导流环3和出口导流环5之间具有一定间隙，且进口导流环3和出口导流环5之间的中间导流环4数量为一或多个，中间导流环4的具体数量随着导流装置的大小而变化，当中间导流环4为多个时，多个中间导流环4中相邻的中间导流环4之间也具有一定间隙，本实施例中中间导流环4数量为一个，其中内部导流筒1的侧面和中间具有间隙的进口导流环3、中间导流环4和出口导流环5的侧面均为同轴锥形面，形成多层曲面结构，可减小废气气流的扰动，改善气流的径向不均匀性；
进口导流环3的侧面设有多组与内部分流板2位置相对应的进口分流板6， 多组进口分流板6与进口导流环3的侧面垂直设置，多组进口分流板6呈环形阵列分布在进口导流环3的侧面且进口分流板6与进口导流环3一体成型，进口分流板6与相对应的内部分流板2处于同一平面，出口导流环5的侧面设有多组与内部分流板2位置相对应的出口分流板7，多组出口分流板7与出口导流环5的侧面垂直设置，多组出口分流板7呈环形阵列分布在出口导流环5的侧面且出口分流板7与出口导流环5一体成型，出口分流板7与相对应的内部分流板2处于同一平面，其中进口分流板6的尺寸大于出口分流板7的尺寸，且多组进口分流板6与多组出口分流板7均一一对应且平行设置；进出口分流板和内部分流板2将多层曲面结构划分为周向的多个等面积的区域，减小气流在周向上的相互扰动，改善废气气流的周向不均匀性；
如图6和图7所示，内部导流筒1的外圆锥面与进口导流环3、中间导流环4和出口导流环5之间的空间被多组内部分流板2分割成多组体积相同的第一区域8；反应器进口方接圆11的扩张腔内壁与进口导流环3、中间导流环4和出口导流环5之间的空间被多组进口分流板6和出口分流板7分割成多组体积相同的第二区域9，且多组进口分流板6和多组出口分流板7均与反应器进口方接圆11的扩张腔内壁焊接；内部导流筒1的空腔为第三区域10；多组第一区域8中任意一个第一区域8的进出口面积比、多组第二区域9中任意一个第二区域9的进出口面积比和第三区域10的进出口面积比均相等，且垂直于内部导流筒1轴线平面内的多组第一区域8中任意一个第一区域8的面积、多组第二区域9中任意一个第二区域9面积和第三区域10的面积均相等；进出口分流板和内部分流板2将反应器进口方接圆11扩张腔划分为周向的多个等面积的区域，同时等速度混合气体分别进入进出口面积比相等的第一区域8、第二区域9和第三区域10，保证进入方形反应器的废气是均匀等速度的；
如图8所示，工作原理：某船舶主推动力为额定功率为13200kW，额定转速为111r/min的低速柴油机，其中反应器进口方接圆11的扩张腔入口通过法兰与方接圆间段13和Φ720的DN700法兰12与混合管道连接，反应器进口方接圆11的出口尺寸为1376×1348与反应器方形进口连接，扩张比约为4.56；柴油机废气气流从法兰12和法兰与方接圆间段13进入反应器进口方接圆11的扩张腔中，如果没有本装置，气体相当于经过管径由小变大的过程，这时不同位置的速度会发生变化，从而使反应器的性能下降；
本装置就是保证管径变大，不同位置处的混合气体能速度一致的进入反应器的催化剂层，该装置中的内部导流筒1与进口导流环3、中间导流环4和出口导 流环5通过内部分流板2焊接在同轴位置，再用进口分流板6和出口分流板7与反应器进口方接圆11的扩张腔内壁焊接，内部导流筒1的侧面和中间具有间隙的进口导流环3、中间导流环4和出口导流环5的侧面均为同轴锥形面，从而形成多层曲面结构，即将扩张腔腔体呈放射状分割形成多层曲面结构，减小废气气流的扰动，改善气流的径向不均匀性；同时内部分流板2、进口分流板6和出口分流板7将多层曲面结构划分为周向的多个等面积的区域，减小气流在周向上的相互扰动，改善废气气流的周向均匀性；同时等速度混合气体分别进入进出口面积比相等的第一区域8、第二区域9和第三区域10，保证进入方形反应器的废气是均匀等速度的；其类似于将一个大的方接圆切割划分为多个小的等面积的区域，再分为多级扩大，即将气流划分成很多股，保证气体在扩散的过程中互不干扰，均速进入反应器催化剂层，进行催化还原反应。

Claims (10)

  1. 一种船用SCR系统反应器导流装置，所述装置安装于反应器进口方接圆的扩张腔中，其特征在于：包括空心圆锥台形状的内部导流筒，所述内部导流筒的外圆锥面上设有多组呈环形阵列分布的内部分流板，内部导流筒与多组内部分流板一体成型，多组所述内部分流板均呈阶梯状，多组内部分流板上固定套设有与内部导流筒同轴设置的进口导流环、中间导流环和出口导流环，所述中间导流环分别与进口导流环和出口导流环之间具有一定间隙，所述进口导流环的侧面设有多组与内部分流板位置相对应的进口分流板，所述进口分流板呈环形阵列分布在进口导流环的侧面且进口分流板与进口导流环一体成型，所述出口导流环的侧面设有多组与内部分流板位置相对应的出口分流板，所述出口分流板呈环形阵列分布在出口导流环的侧面且出口分流板与出口导流环一体成型。
  2. 根据权利要求1所述的一种船用SCR系统反应器导流装置，其特征在于：所述内部导流筒的外圆锥面与进口导流环、中间导流环和出口导流环之间的空间被多组内部分流板分割成多组体积相同的第一区域；所述反应器进口方接圆的扩张腔内壁与进口导流环、中间导流环和出口导流环之间的空间被多组进口分流板和出口分流板分割成多组体积相同的第二区域；所述内部导流筒的空腔为第三区域；多组所述第一区域中任意一个第一区域的进出口面积比、多组第二区域中任意一个第二区域的进出口面积比和第三区域的进出口面积比均相等，且垂直于内部导流筒轴线平面内的多组第一区域中任意一个第一区域的面积、多组第二区域中任意一个第二区域面积和第三区域的面积均相等。
  3. 根据权利要求1所述的一种船用SCR系统反应器导流装置，其特征在于：所述进口导流环和出口导流环分别位于内部分流板的两端，且进口导流环和出口导流环之间的中间导流环数量为一或多个。
  4. 根据权利要求3所述的一种船用SCR系统反应器导流装置，其特征在于：多个所述中间导流环中相邻的中间导流环之间具有一定间隙。
  5. 根据权利要求1所述的一种船用SCR系统反应器导流装置，其特征在于：所述进口导流环、中间导流环和出口导流环的尺寸依次逐渐递增，且进口导流环、中间导流环和出口导流环均为锥形曲面结构。
  6. 根据权利要求1所述的一种船用SCR系统反应器导流装置，其特征在于：所述进口分流板的尺寸大于出口分流板的尺寸。
  7. 根据权利要求1所述的一种船用SCR系统反应器导流装置，其特征在于：多组所述内部分流板均与内部导流筒的外圆锥面垂直设置，多组进口分流板与进口导流环的侧面垂直设置，多组出口分流板与出口导流环的侧面垂直设置。
  8. 根据权利要求7所述的一种船用SCR系统反应器导流装置，其特征在于：所述进口分流板与相对应的内部分流板处于同一平面，所述出口分流板与相对应的内部分流板处于同一平面。
  9. 根据权利要求7所述的一种船用SCR系统反应器导流装置，其特征在于：多组所述进口分流板与多组出口分流板均一一对应且平行设置。
  10. 根据权利要求2所述的一种船用SCR系统反应器导流装置，其特征在于：多组所述进口分流板和多组出口分流板均与反应器进口方接圆的扩张腔内壁焊接。
PCT/CN2020/087228 2019-08-14 2020-04-27 一种船用scr系统反应器导流装置 WO2021027327A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020207014045A KR102317275B1 (ko) 2019-08-14 2020-04-27 선박용 scr 시스템 반응기 도류 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910748545.3A CN110420560A (zh) 2019-08-14 2019-08-14 一种船用scr系统反应器导流装置
CN201910748545.3 2019-08-14

Publications (1)

Publication Number Publication Date
WO2021027327A1 true WO2021027327A1 (zh) 2021-02-18

Family

ID=68414593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/087228 WO2021027327A1 (zh) 2019-08-14 2020-04-27 一种船用scr系统反应器导流装置

Country Status (3)

Country Link
KR (1) KR102317275B1 (zh)
CN (1) CN110420560A (zh)
WO (1) WO2021027327A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230057647A1 (en) * 2021-08-17 2023-02-23 Purem GmbH Exhaust gas system for an internal combustion engine
US12025045B2 (en) * 2021-08-17 2024-07-02 Purem GmbH Exhaust gas system for an internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110420560A (zh) * 2019-08-14 2019-11-08 江苏科技大学 一种船用scr系统反应器导流装置
CN111589377A (zh) * 2020-05-29 2020-08-28 德艾柯工程技术（上海）有限公司 一种用于卧式反应器的气体分布器
CN113217154B (zh) * 2021-05-26 2022-06-24 河南柴油机重工有限责任公司 一种用于scr系统的混合装置
CN113405368A (zh) * 2021-06-23 2021-09-17 四川士达特种炭材有限公司 一种单体焙烧炉用导流锥
CN115532057B (zh) * 2022-10-31 2023-10-27 连云港虹洋热电有限公司 一种热电厂烟气的净化脱硝装置及其方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1990513A1 (de) * 2007-05-08 2008-11-12 Friedrich Boysen GmbH & Co. KG Vorrichtung zum Verteilen von fließfähigen Zusatzstoffen in Abgasanlagen
CN202021015U (zh) * 2011-03-18 2011-11-02 中国船舶重工集团公司第七一一研究所 用于船用柴油机scr系统的混合导流装置
CN102852607A (zh) * 2012-09-26 2013-01-02 中国船舶重工集团公司第七一一研究所 船用柴油机scr反应器导流装置
CN103585908A (zh) * 2013-11-20 2014-02-19 哈尔滨工程大学 多级导流叶片式静态混合器
KR20140024082A (ko) * 2012-08-17 2014-02-28 세종공업 주식회사 디젤 엔진의 배기가스 후처리 시스템용 믹싱 모듈
CN110420560A (zh) * 2019-08-14 2019-11-08 江苏科技大学 一种船用scr系统反应器导流装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110063965A (ko) * 2009-12-07 2011-06-15 한양대학교 산학협력단 배기가스 저감 장치
CN106321520B (zh) * 2016-10-20 2018-11-23 珠海格力电器股份有限公司 导流圈结构、轴流风机及空调器
CN210584503U (zh) * 2019-08-14 2020-05-22 江苏科技大学 一种船用scr系统反应器导流装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1990513A1 (de) * 2007-05-08 2008-11-12 Friedrich Boysen GmbH & Co. KG Vorrichtung zum Verteilen von fließfähigen Zusatzstoffen in Abgasanlagen
CN202021015U (zh) * 2011-03-18 2011-11-02 中国船舶重工集团公司第七一一研究所 用于船用柴油机scr系统的混合导流装置
KR20140024082A (ko) * 2012-08-17 2014-02-28 세종공업 주식회사 디젤 엔진의 배기가스 후처리 시스템용 믹싱 모듈
CN102852607A (zh) * 2012-09-26 2013-01-02 中国船舶重工集团公司第七一一研究所 船用柴油机scr反应器导流装置
CN103585908A (zh) * 2013-11-20 2014-02-19 哈尔滨工程大学 多级导流叶片式静态混合器
CN110420560A (zh) * 2019-08-14 2019-11-08 江苏科技大学 一种船用scr系统反应器导流装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230057647A1 (en) * 2021-08-17 2023-02-23 Purem GmbH Exhaust gas system for an internal combustion engine
US12025045B2 (en) * 2021-08-17 2024-07-02 Purem GmbH Exhaust gas system for an internal combustion engine

Also Published As

Publication number Publication date
KR20210020859A (ko) 2021-02-24
CN110420560A (zh) 2019-11-08
KR102317275B1 (ko) 2021-10-26

Similar Documents

Publication Publication Date Title
WO2021027327A1 (zh) 一种船用scr系统反应器导流装置
US9534781B2 (en) System and method having multi-tube fuel nozzle with differential flow
US3964875A (en) Swirl exhaust gas flow distribution for catalytic conversion
RU2515566C2 (ru) Узел нейтрализации отработавшего газа с отклоняющей поверхностью и способ его изготовления
RU2014139269A (ru) Система выпуска для двигателя (варианты) и способ работы системы выпуска
JP2011236897A (ja) ガスタービンシステム用のディフューザ
CN102852607B (zh) 船用柴油机scr反应器导流装置
CN112922678B (zh) 一种用于汽轮机的轴向出汽的进汽室
CN210584503U (zh) 一种船用scr系统反应器导流装置
CN211819593U (zh) 一种scr排气混合装置
JP2005226640A (ja) エンジンの燃焼室冷却システム
US20180163968A1 (en) Fuel Nozzle Assembly with Inlet Flow Conditioner
CN111760476A (zh) 航空发动机高空舱气体混合方法及基于文丘里管的气体混合器
CN113107650A (zh) 一种用于柴油机urea-SCR系统的动态混合器
CN217632626U (zh) 一种尿素喷嘴用雾化片
CN212644682U (zh) 燃气混合装置
WO2021196671A1 (zh) 燃气发动机混合器
CN101124391A (zh) 用于催化转化器的分流器
CN214745903U (zh) 燃烧器进口整流结构
CN113795653B (zh) 环形催化转化器
CN208281024U (zh) 管道内喷液快速蒸发装置
CN113091093A (zh) 燃气轮机的空气整流罩及喷嘴
CN210660361U (zh) 一种进气混合装置及发动机
CN219262531U (zh) 一种用于涡扇发动机排气系统的管板式混合器
CN213777704U (zh) 一种分流导向燃烧器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20852756

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20852756

Country of ref document: EP

Kind code of ref document: A1