WO2022037156A1 - Mixing apparatus having transversely arranged dual cyclone tubes - Google Patents

Mixing apparatus having transversely arranged dual cyclone tubes Download PDF

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Publication number
WO2022037156A1
WO2022037156A1 PCT/CN2021/095405 CN2021095405W WO2022037156A1 WO 2022037156 A1 WO2022037156 A1 WO 2022037156A1 CN 2021095405 W CN2021095405 W CN 2021095405W WO 2022037156 A1 WO2022037156 A1 WO 2022037156A1
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Prior art keywords
swirl
pipe
partition plate
blade
blades
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PCT/CN2021/095405
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French (fr)
Chinese (zh)
Inventor
何龙
张旭
陈增响
何伟娇
付细平
周磊
蒋海荣
马相雪
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无锡威孚力达催化净化器有限责任公司
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Publication of WO2022037156A1 publication Critical patent/WO2022037156A1/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
    • F01N3/24—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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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 relates to a horizontal mixing device with double swirl tubes, belonging to the field of diesel engine exhaust post-processing equipment.
  • SCR Selective Catalytic Reduction Converter
  • the purpose of the present invention is to overcome the deficiencies in the prior art, and provide a mixing device with horizontal double swirl tubes, which can improve ammonia mixing uniformity as much as possible, reduce urea crystallization, and ensure stable operation of SCR.
  • a mixing device with double swirl tubes horizontally arranged comprising a cylinder body, a base is arranged on the upper end of the cylinder body, a nozzle is connected to the base, a first swirl tube is arranged in the cylinder, and a first swirl tube is arranged in the cylinder.
  • the upper end of the flow pipe is provided with a urea injection port that is matched with the nozzle, and the first swirl pipes located on the front side and the rear side of the urea injection port are respectively provided with a first front baffle and a first rear baffle, and the first swirl pipe passes through.
  • the first front baffle and the first rear baffle are fixed in the cylinder, the bottom of the first front baffle is provided with a waist-shaped hole; the first swirl pipe is provided with a second swirl pipe, the second swirl pipe The second front baffle and the second rear baffle are fixed on the intake end of the first swirl tube; the first vane and the corresponding vane holes are arranged around the intake end of the first swirl tube.
  • the bottom of the flow pipe is provided with a second blade and a corresponding blade hole, the second blade is located between the first front baffle and the first rear baffle, the air outlet end of the first swirl pipe is provided with a swirl plate, and the swirl plate is connected to the swirl plate.
  • a mixing cavity is formed between the first front baffles; air inlets are evenly distributed on the second rear baffle, and fourth blades and corresponding blade holes are evenly distributed on the second swirling tube.
  • first blades there are 15-20 first blades, the blade length is 40-50 mm, the width is 15-20 mm, and the angle between the first blade and the first swirling tube is 30-60°.
  • the second blade is provided with 2-3 blades, the blade length is 30-45 mm, the width is 10-20 mm, and the angle with the first swirling tube is 30-45°.
  • a flanging hole is opened in the middle of the swirl plate, and the third vanes and the corresponding vane holes are evenly arranged along the circumference of the swirl plate.
  • the total airflow area should not be less than 6000 mm 2 .
  • the airflow circulation area of the waist-shaped hole is 200-400 mm 2 .
  • the present invention has the following advantages:
  • FIG. 1 is a cross-sectional view of the present invention.
  • FIG. 2 is a schematic structural diagram of the present invention.
  • FIG. 3 is a schematic structural diagram of a first swirling tube.
  • FIG. 4 is a schematic structural diagram of the second rear partition.
  • Figure 5 is a schematic view of the structure of the swirl plate.
  • FIG. 6 is a schematic structural diagram of the first front baffle.
  • FIG. 7 is a schematic structural diagram of the second swirling tube.
  • a mixing device with double swirling tubes horizontally arranged includes a cylinder body 7 , a base 3 is arranged on the upper end of the cylinder body 7 , a nozzle 4 is connected to the base 3 , and a first cylinder 7 is arranged in the cylinder body 7 .
  • a swirl pipe 1, the upper end of the first swirl pipe 1 is provided with a urea injection port 12 matched with the nozzle 4, and the first swirl pipe 1 located on the front side and the rear side of the urea injection port 12 is respectively provided with a first front partition
  • the plate 8 and the first rear partition 5, the first swirl pipe 1 is fixed in the cylinder 7 through the first front partition 8 and the first rear partition 5, and the bottom of the first front partition 8 is provided with a waist
  • a second swirl pipe 9 is arranged in the first swirl pipe 1, and the second swirl pipe 9 is fixed on the first swirl pipe 1 through the second front baffle 10 and the second rear baffle 2 Air inlet end; the air inlet end of the first swirl tube 1 is provided with a first vane 14 and corresponding vane holes, and the bottom of the first swirl tube 1 is provided with a second vane 13 and corresponding vane holes.
  • the two blades 13 are located between the first front baffle 8 and the first rear baffle 5 , and the swirl plate 6 is provided at the air outlet end of the first swirl pipe 1 , and a mixture is formed between the swirl plate 6 and the first front baffle 8 Cavity 11 ; air inlets 21 are uniformly distributed on the second rear baffle 2 , and fourth blades 15 and corresponding blade holes are uniformly distributed on the second swirling tube 9 .
  • first blades 14 There are 15-20 first blades 14, the length of the blades is 40-50 mm, the width is 15-20 mm, and the angle between the first blades 14 and the first swirling tube 1 is 30-60°.
  • the second blade 13 is provided with 2-3 pieces, the blade length is 30-45 mm, the width is 10-20 mm, and the angle with the first swirling tube 1 is 30-45°.
  • the middle of the swirl plate 6 is provided with a flanging hole 62, the diameter of which is 40-60 mm, and the flanging height should not be greater than 15 mm.
  • the number of the third blades 61 and the corresponding blade holes evenly arranged along the circumference on the swirl plate 6 is 8-12, the angle between the blades and the plate is 30-60°C, the length is 20-30mm, and the width is 10 ⁇ 20mm.
  • the air flow area of the waist-shaped hole 81 is 200-400 mm 2 .
  • the second swirl tube 9 is first welded and fixed with the partition plate 10, and then the whole is put into the swirl tube 1 and welded and fixed; And it is fixed by welding; the swirl plate 6 is inserted into the swirl pipe 1 and welded and fixed, the first rear partition 5 and the first front partition 8 are loaded into the above-mentioned formed parts and welded and fixed, pay attention to the urea injection port 12 and The relative position of the waist-shaped groove 81; finally, the whole part is stuffed into the mixer barrel 7, and welded and fixed. After welding the nozzle, the whole mixer is completed.
  • the upward airflow prevents the urea particles from accumulating in the mixing chamber 11. At the bottom, crystals form.
  • the 3-way airflow finally merges in the mixing chamber 11, and after the urea particles are continuously mixed, the third blade 61 on the swirl plate 6 strengthens the swirl effect, and finally the urea particles are evenly distributed on the front end of the SCR.
  • the flanged holes 62 of the swirl plate 6 can reduce part of the back pressure.

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

Abstract

A mixing apparatus having transversely arranged dual cyclone tubes, comprising a barrel body (7). A base (3) is provided at the upper end of the barrel body (7). The base (3) is connected to a nozzle (4). A first cyclone tube (1) is provided within said barrel body (7). The upper end of the first cyclone tube (1) is provided with a urea spray inlet (12) matching the nozzle (4). A first front partition plate (8) and a first rear partition plate (5) are respectively provided at the front side and the rear side of the urea spray inlet (12) on the first cyclone tube (1). The first cyclone tube (1) is fixed within the barrel body (7) by means of the first front partition plate (8) and the first rear partition plate (5). A second cyclone tube (9) is provided within the first cyclone tube (1). The second cyclone tube (9) is fixed at the air inlet end of the first cyclone tube (1) by means of a second front partition plate (10) and a second rear partition plate (2). First blades (14) and corresponding blade holes are provided around the air inlet end of the first cyclone tube (1). The air outlet end of the first cyclone tube (1) is provided with a cyclone plate (6). A mixing cavity (11) is formed between the cyclone plate (6) and the first front partition plate (8). The present mixing apparatus improves the mixing uniformity of ammonia, reduces urea crystallization, and ensures the stable operation of SCR.

Description

一种双旋流管橫置的混合装置A kind of mixing device with double swirling tubes horizontally arranged 技术领域technical field
本发明涉及一种双旋流管橫置的混合装置，属于柴油机尾气后处理设备领域。The invention relates to a horizontal mixing device with double swirl tubes, belonging to the field of diesel engine exhaust post-processing equipment.
背景技术Background technique
随着国家柴油车尾气污染物排放标准发展到欧六阶段，SCR(选择性催化还原转化器)技术已经成为国内各大主机厂的首选。SCR技术要求在SCR前端布置尿素混合器，尿素水溶液喷射进入混合器，经混合器的破碎、混合作用，使尿素均匀的分布在SCR前端面。With the development of the national diesel vehicle exhaust pollutant emission standard to the Euro VI stage, SCR (Selective Catalytic Reduction Converter) technology has become the first choice of major domestic OEMs. SCR technology requires a urea mixer to be arranged at the front end of the SCR, and the urea aqueous solution is injected into the mixer, and the urea is evenly distributed on the front end of the SCR through the crushing and mixing action of the mixer.
现有的混合器通常存在混合均匀性较差的问题，从而影响整车的性能。因此，如何将氨气均匀的带到SCR载体端面成为SCR技术中的关键环节。Existing mixers usually suffer from poor mixing uniformity, which affects the performance of the entire vehicle. Therefore, how to uniformly bring ammonia to the end face of the SCR carrier has become a key link in the SCR technology.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于克服现有技术中存在的不足，提供一种双旋流管橫置的混合装置，能够尽量提高氨混合均匀性、减少尿素结晶的SCR混合装置，保证SCR的稳定运行。The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a mixing device with horizontal double swirl tubes, which can improve ammonia mixing uniformity as much as possible, reduce urea crystallization, and ensure stable operation of SCR.
按照本发明提供的技术方案：一种双旋流管橫置的混合装置，包括筒体，筒体的上端设置底座，底座上连接喷嘴，所述筒体内设置第一旋流管，第一旋流管的上端设有与喷嘴配合的尿素喷入口，位于尿素喷入口前侧和后侧的第一旋流管上分别设置第一前隔板和第一后隔板，第一旋流管通过第一前隔板和第一后隔板固定在筒体内，所述第一前隔板的底部设有腰形孔；所述第一旋流管内设置第二旋流管，第二旋流管通过第二前隔板和第二后隔板固定在第一旋流管的进气端；所述第一旋流管的进气端环设第一叶片及相对应的叶片孔，第一旋流管的底部设置第二叶片及相对应的叶片孔，第二叶片位于第一前隔板和第一后隔板之间，第一旋流管的出气端设置旋流板，旋流板与第一前隔板之间形成混合腔；所述第二后隔板上均布进气口，所述第二旋流管上均布第四叶片及相对应的叶片孔。According to the technical solution provided by the present invention: a mixing device with double swirl tubes horizontally arranged, comprising a cylinder body, a base is arranged on the upper end of the cylinder body, a nozzle is connected to the base, a first swirl tube is arranged in the cylinder, and a first swirl tube is arranged in the cylinder. The upper end of the flow pipe is provided with a urea injection port that is matched with the nozzle, and the first swirl pipes located on the front side and the rear side of the urea injection port are respectively provided with a first front baffle and a first rear baffle, and the first swirl pipe passes through. The first front baffle and the first rear baffle are fixed in the cylinder, the bottom of the first front baffle is provided with a waist-shaped hole; the first swirl pipe is provided with a second swirl pipe, the second swirl pipe The second front baffle and the second rear baffle are fixed on the intake end of the first swirl tube; the first vane and the corresponding vane holes are arranged around the intake end of the first swirl tube. The bottom of the flow pipe is provided with a second blade and a corresponding blade hole, the second blade is located between the first front baffle and the first rear baffle, the air outlet end of the first swirl pipe is provided with a swirl plate, and the swirl plate is connected to the swirl plate. A mixing cavity is formed between the first front baffles; air inlets are evenly distributed on the second rear baffle, and fourth blades and corresponding blade holes are evenly distributed on the second swirling tube.
进一步地，所述第一叶片设有15～20个,叶片长度为40～50mm，宽度为15～20mm，第一叶片与第一旋流管的角度为30～60°。Further, there are 15-20 first blades, the blade length is 40-50 mm, the width is 15-20 mm, and the angle between the first blade and the first swirling tube is 30-60°.
进一步地，所述第二叶片设有2～3个，叶片长度30～45mm，宽度为10～20mm，与第一旋流管的角度为30～45°。Further, the second blade is provided with 2-3 blades, the blade length is 30-45 mm, the width is 10-20 mm, and the angle with the first swirling tube is 30-45°.
进一步地，所述旋流板的中部开有翻边孔，旋流板上沿圆周均匀布置的第三叶片及相对应的叶片孔。Further, a flanging hole is opened in the middle of the swirl plate, and the third vanes and the corresponding vane holes are evenly arranged along the circumference of the swirl plate.
进一步地，所述第二后隔板上的进气口设有4～8个，总的气流流通面积不得小于6000mm 2。 Further, there are 4 to 8 air inlets on the second rear baffle, and the total airflow area should not be less than 6000 mm 2 .
进一步地，所述腰形孔的气流流通面积为200～400mm 2。 Further, the airflow circulation area of the waist-shaped hole is 200-400 mm 2 .
本发明与现有技术相比，具有如下优点：Compared with the prior art, the present invention has the following advantages:
通过双旋流管进气，在进气端加强气流的旋转效果，使尿素水溶液在腔体内能充分混合，再经旋流板的旋转后，扩散到SCR前端面，具有3重旋流，能充分改善尿素的混合效果，提升混合器的氨混合均匀性指标。Intake through the double swirl tube, strengthen the rotation effect of the airflow at the intake end, so that the urea aqueous solution can be fully mixed in the cavity, and then spread to the front end of the SCR after the rotation of the swirl plate, with triple swirl flow, which can Fully improve the mixing effect of urea and improve the ammonia mixing uniformity index of the mixer.
附图说明Description of drawings
图1为本发明的剖视图。FIG. 1 is a cross-sectional view of the present invention.
图2为本发明的结构示意图。FIG. 2 is a schematic structural diagram of the present invention.
图3为第一旋流管的结构示意图。FIG. 3 is a schematic structural diagram of a first swirling tube.
图4为第二后隔板的结构示意图。FIG. 4 is a schematic structural diagram of the second rear partition.
图5为旋流板的结构示意图。Figure 5 is a schematic view of the structure of the swirl plate.
图6为第一前隔板的结构示意图。FIG. 6 is a schematic structural diagram of the first front baffle.
图7为第二旋流管的结构示意图。FIG. 7 is a schematic structural diagram of the second swirling tube.
附图标记说明：1-第一旋流管、2-第二后隔板、3-底座、4-喷嘴、5-第一后隔板、6-旋流板、7-筒体、8-第一前隔板、9-第二旋流管、10-第二前隔板、11-混合腔、12-尿素喷入口、13-第二叶片、14-第一叶片、21-进气口、61-第三叶片、62-翻边孔、81-腰形孔。Description of reference numerals: 1-first swirl pipe, 2-second rear baffle, 3-base, 4-nozzle, 5-first rear baffle, 6-swirl plate, 7-cylinder, 8- First front baffle, 9-second swirl pipe, 10-second front baffle, 11-mixing chamber, 12-urea injection port, 13-second vane, 14-first vane, 21-air inlet , 61-the third blade, 62-flanging hole, 81-waist hole.
具体实施方式detailed description
下面结合具体附图对本发明作进一步说明。The present invention will be further described below in conjunction with the specific drawings.
如图1到图7所示，一种双旋流管橫置的混合装置，包括筒体7，筒体7的上端设置底座3，底座3上连接喷嘴4，所述筒体7内设置第一旋流管1，第一旋流管1的上端设有与喷嘴4配合的尿素喷入口12，位于尿素喷入口12前侧和后侧的第一旋流管1上分别设置第一前隔板8和第一后隔板5，第一旋流管1通过第一前隔板8和第一后隔板5固定在筒体7内，所述第一前隔板8的底部设有腰形孔81；所述第一旋流管1内设置第二旋流管9，第二旋流管9通过第二前隔板10和第二后隔板2固定在第一旋流管1的进气端；所述第一旋流管1的进气端环设第一叶片14及相对应的叶片孔，第一旋流管1的底部设置第二叶片13及相对应的叶片孔，第二叶片13位于第一前隔板8和第一后隔板5之间，第一旋流管1的出气端设置旋流板6，旋流板6与第一前隔板8之间形成混合腔11；所述第二后隔板2上均布进气口21，所述第二旋流管9上均布第四叶片15及相对应的叶片孔。As shown in FIGS. 1 to 7 , a mixing device with double swirling tubes horizontally arranged includes a cylinder body 7 , a base 3 is arranged on the upper end of the cylinder body 7 , a nozzle 4 is connected to the base 3 , and a first cylinder 7 is arranged in the cylinder body 7 . A swirl pipe 1, the upper end of the first swirl pipe 1 is provided with a urea injection port 12 matched with the nozzle 4, and the first swirl pipe 1 located on the front side and the rear side of the urea injection port 12 is respectively provided with a first front partition The plate 8 and the first rear partition 5, the first swirl pipe 1 is fixed in the cylinder 7 through the first front partition 8 and the first rear partition 5, and the bottom of the first front partition 8 is provided with a waist A second swirl pipe 9 is arranged in the first swirl pipe 1, and the second swirl pipe 9 is fixed on the first swirl pipe 1 through the second front baffle 10 and the second rear baffle 2 Air inlet end; the air inlet end of the first swirl tube 1 is provided with a first vane 14 and corresponding vane holes, and the bottom of the first swirl tube 1 is provided with a second vane 13 and corresponding vane holes. The two blades 13 are located between the first front baffle 8 and the first rear baffle 5 , and the swirl plate 6 is provided at the air outlet end of the first swirl pipe 1 , and a mixture is formed between the swirl plate 6 and the first front baffle 8 Cavity 11 ; air inlets 21 are uniformly distributed on the second rear baffle 2 , and fourth blades 15 and corresponding blade holes are uniformly distributed on the second swirling tube 9 .
所述第一叶片14设有15～20个,叶片长度为40～50mm，宽度为15～20mm，第一叶片14与第一旋流管1的角度为30～60°。There are 15-20 first blades 14, the length of the blades is 40-50 mm, the width is 15-20 mm, and the angle between the first blades 14 and the first swirling tube 1 is 30-60°.
所述第二叶片13设有2～3个，叶片长度30～45mm，宽度为10～20mm，与第一旋流管1的角度为30～45°。The second blade 13 is provided with 2-3 pieces, the blade length is 30-45 mm, the width is 10-20 mm, and the angle with the first swirling tube 1 is 30-45°.
所述旋流板6的中部开有翻边孔62，其直径为40～60mm，翻边高度不得大于15mm。旋流板6上沿圆周均匀布置的第三叶片61及相对应的叶片孔，其个数为8～12个，叶片与板的角度为30～60℃，长度为20～30mm，宽度为10～20mm。The middle of the swirl plate 6 is provided with a flanging hole 62, the diameter of which is 40-60 mm, and the flanging height should not be greater than 15 mm. The number of the third blades 61 and the corresponding blade holes evenly arranged along the circumference on the swirl plate 6 is 8-12, the angle between the blades and the plate is 30-60°C, the length is 20-30mm, and the width is 10 ~20mm.
所述第二后隔板2上的进气口21设有4～8个，总的气流流通面积不得小于6000mm 2。 There are 4 to 8 air inlets 21 on the second rear baffle 2, and the total air flow area should not be less than 6000 mm 2 .
所述腰形孔81的气流流通面积为200～400mm 2。 The air flow area of the waist-shaped hole 81 is 200-400 mm 2 .
焊接时，第二旋流管9先与隔板10焊接固定后，将其整体装入旋流管1内并焊接固定；然后将第二后隔板2从旋流管1出气端塞入，并与其焊接固定；将旋流板6塞入旋流管1并焊接固定，将第一后隔板5、第一前隔板8装入上述形成的部件并焊接固定，注意尿素喷入口12和腰形槽81的相对位置；最后将整个部件塞入混合器筒体7内，并焊接固定，焊上喷嘴后，整个混合器就制作完成了。When welding, the second swirl tube 9 is first welded and fixed with the partition plate 10, and then the whole is put into the swirl tube 1 and welded and fixed; And it is fixed by welding; the swirl plate 6 is inserted into the swirl pipe 1 and welded and fixed, the first rear partition 5 and the first front partition 8 are loaded into the above-mentioned formed parts and welded and fixed, pay attention to the urea injection port 12 and The relative position of the waist-shaped groove 81; finally, the whole part is stuffed into the mixer barrel 7, and welded and fixed. After welding the nozzle, the whole mixer is completed.
工作原理：气流进入混合装置时，形成3路气流，第1路气流从第二旋流管9进入，由于第二后隔板2的存在，使气流强制经过第二旋流管9的叶片形成转旋气流；第2路气流经第一旋流管1的第一叶片14进入后形成旋转气流；这两路气流混合后形成强烈的旋转气流，经第二后隔板2上的进气口21进入混合腔11，该气流带动尿素颗粒不断旋转混合。第3路气流经第一前隔板8上的腰形孔81进入，然后经过第一旋流管1上的第二叶片13进入混合腔11，向上的气流防止尿素颗粒聚集在混合腔11的底部，形成结晶。3路气流最终汇合在混合腔11内，并使尿素颗粒不断混合后，再次经过旋流板6上的第三叶片61加强旋流效果，最终使尿素颗粒均匀分布到SCR的前端面上，同时旋流板6的翻边孔62可以减小部分背压。Working principle: When the air flow enters the mixing device, 3 air flows are formed. The first air flow enters from the second swirl tube 9. Due to the existence of the second rear baffle 2, the airflow is forced to pass through the blades of the second swirl tube 9. Swirl airflow; the second airflow enters through the first blade 14 of the first swirl tube 1 to form a swirling airflow; the two airflows are mixed to form a strong swirling airflow, which passes through the air inlet on the second rear baffle 2 21 enters the mixing chamber 11, and the airflow drives the urea particles to rotate and mix continuously. The third air flow enters through the waist-shaped hole 81 on the first front baffle 8, and then enters the mixing chamber 11 through the second blade 13 on the first swirling tube 1. The upward airflow prevents the urea particles from accumulating in the mixing chamber 11. At the bottom, crystals form. The 3-way airflow finally merges in the mixing chamber 11, and after the urea particles are continuously mixed, the third blade 61 on the swirl plate 6 strengthens the swirl effect, and finally the urea particles are evenly distributed on the front end of the SCR. The flanged holes 62 of the swirl plate 6 can reduce part of the back pressure.
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, without departing from the spirit and essence of the present invention, various modifications and improvements can be made, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (6)

  1. 一种双旋流管橫置的混合装置，包括筒体(7)，筒体(7)的上端设置底座(3)，底座(3)上连接喷嘴(4)，其特征在于，所述筒体(7)内设置第一旋流管(1)，第一旋流管(1)的上端设有与喷嘴(4)配合的尿素喷入口(12)，位于尿素喷入口(12)前侧和后侧的第一旋流管(1)上分别设置第一前隔板(8)和第一后隔板(5)，第一旋流管(1)通过第一前隔板(8)和第一后隔板(5)固定在筒体(7)内，所述第一前隔板(8)的底部设有腰形孔(81)；所述第一旋流管(1)内设置第二旋流管(9)，第二旋流管(9)通过第二前隔板(10)和第二后隔板(2)固定在第一旋流管(1)的进气端；所述第一旋流管(1)的进气端环设第一叶片(14)及相对应的叶片孔，第一旋流管(1)的底部设置第二叶片(13)及相对应的叶片孔，第二叶片(13)位于第一前隔板(8)和第一后隔板(5)之间，第一旋流管(1)的出气端设置旋流板(6)，旋流板(6)与第一前隔板(8)之间形成混合腔(11)；所述第二后隔板(2)上均布进气口(21)，所述第二旋流管(9)上均布第四叶片(15)及相对应的叶片孔。A mixing device with double swirl tubes horizontally arranged, comprising a cylinder body (7), a base (3) is arranged on the upper end of the cylinder body (7), and a nozzle (4) is connected to the base (3), characterized in that the cylinder A first swirl pipe (1) is arranged in the body (7), and the upper end of the first swirl pipe (1) is provided with a urea injection port (12) that cooperates with the nozzle (4), and is located on the front side of the urea injection port (12). A first front baffle (8) and a first rear baffle (5) are respectively provided on the first swirl pipe (1) on the rear side, and the first swirl pipe (1) passes through the first front baffle (8) and the first rear partition plate (5) are fixed in the cylinder body (7), the bottom of the first front partition plate (8) is provided with a waist-shaped hole (81); A second swirl pipe (9) is provided, and the second swirl pipe (9) is fixed on the intake end of the first swirl pipe (1) through the second front baffle (10) and the second rear baffle (2). The inlet end of the first swirl pipe (1) is provided with a first blade (14) and corresponding blade holes, and the bottom of the first swirl pipe (1) is provided with a second blade (13) and corresponding The second vane (13) is located between the first front baffle (8) and the first rear baffle (5), and the air outlet end of the first swirl pipe (1) is provided with a swirl plate (6), A mixing chamber (11) is formed between the swirl plate (6) and the first front partition plate (8); air inlets (21) are uniformly distributed on the second rear partition plate (2), and the second swirl flow Fourth blades (15) and corresponding blade holes are uniformly distributed on the pipe (9).
  2. 如权利要求1所述的双旋流管橫置的混合装置，其特征在于，所述第一叶片(14)设有15～20个,叶片长度为40～50mm，宽度为15～20mm，第一叶片(14)与第一旋流管(1)的角度为30～60°。The horizontal mixing device with double swirl tubes according to claim 1, characterized in that, the first blades (14) are provided with 15-20 blades, the length of the blades is 40-50 mm, the width is 15-20 mm, and the The angle between a blade (14) and the first swirling tube (1) is 30-60°.
  3. 如权利要求1所述的双旋流管橫置的混合装置，其特征在于，所述第二叶片(13)设有2～3个，叶片长度30～45mm，宽度为10～20mm，与第一旋流管(1)的角度为30～45°。The horizontal mixing device with double swirl tubes according to claim 1, characterized in that, the second blades (13) are provided with 2-3 blades, the blade length is 30-45 mm, and the width is 10-20 mm, which is the same as the second blade (13). The angle of a swirl pipe (1) is 30-45°.
  4. 如权利要求1所述的双旋流管橫置的混合装置，其特征在于，所述旋流板(6)的中部开有翻边孔(62)，旋流板(6)上沿圆周均匀布置的第三叶片(61)及相对应的叶片孔。The mixing device with double swirling tubes horizontally arranged according to claim 1, characterized in that, a flanging hole (62) is opened in the middle of the swirling plate (6), and the swirling plate (6) is evenly distributed along the circumference. Arranged third vanes (61) and corresponding vane holes.
  5. 如权利要求1所述的双旋流管橫置的混合装置，其特征在于，所述第二后隔板(2)上的进气口(21)设有4～8个，总的气流流通面积不得小于6000mm 2。 The horizontal mixing device with double swirl tubes according to claim 1, characterized in that, the air inlets (21) on the second rear partition plate (2) are provided with 4 to 8 air inlets, and the total airflow is circulated The area shall not be less than 6000mm 2 .
  6. 如权利要求1所述的双旋流管橫置的混合装置，其特征在于，所述腰形孔(81)的气流流通面积为200～400mm 2。 The mixing device with horizontal double swirling tubes according to claim 1, characterized in that, the air flow area of the waist-shaped hole (81) is 200-400 mm 2 .
PCT/CN2021/095405 2020-08-18 2021-05-24 Mixing apparatus having transversely arranged dual cyclone tubes WO2022037156A1 (en)

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