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Multistage guide vane static mixer

A technology of static mixer and guide vane, applied in fluid mixer, mixer, mixing method, etc., can solve problems such as large pressure loss, and achieve the effect of reducing pressure loss

Active Publication Date: 2015-05-27
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current commercial static mixers, such as SV and SK types, produce a large pressure loss, and the length of the mixer required to achieve a uniform mixing effect is relatively long, generally about 6 times the pipe diameter, and for diesel engine SCR system pipes In the case of high flow rates and large differences in component ratios, longer mixer lengths are required

Method used

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  • Multistage guide vane static mixer
  • Multistage guide vane static mixer
  • Multistage guide vane static mixer

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Embodiment approach 1

[0020] combine Figure 1~3 , the technical scheme adopted in the present invention is:

[0021] A multi-stage guide vane static mixer, which is composed of a mixer body and a bracket, and is made of high temperature and corrosion resistant metal or nonmetal; the mixer body consists of several blades from small to large along the axial direction of the pipeline Arranged and fixed by a connecting rod based on the center of the blade body, where the angle of rotation of each two adjacent blade bodies along the axis of the connecting rod and the number of blade edges on the central plane satisfy the relationship: rotation angle = 180° / Number of edges of blades on the center plane; the blade body is a polygonal sheet structure with a certain thickness, the blades on the center plane are equilateral polygons, and the side blades are triangles, rectangles, polygons, or curves based on the sides of the blades on the center plane shape. The central plane blade and the side blades ar...

Embodiment approach 2

[0025] combine figure 1 and image 3 , the multi-stage guide vane static mixer is placed in the pipeline 1, which is composed of a mixer body and a bracket, and both are solid bodies; the mixer body consists of 6 blade bodies 3 arranged at equal intervals from small to large, and the blades The center of the body 3 is a reference, which is welded and fixed by the connecting rod 4. Wherein every adjacent two blade bodies 3 rotate 60 degrees along connecting rod 4 axle centers; The isosceles trapezoidal blades are bent and connected, and the bending angle is 120 degrees; the shape and size of the central plane blades of the six blade bodies 3 are the same, while the side blades of the first three blade bodies 3 gradually increase in size, and the last three blades The diameter of the circumscribed circle of the apex of the side blades of the body 3 is the same as the inner diameter of the pipe 1 . The mixer is integrally formed into a truncated cone with a certain taper, such...

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Abstract

The invention aims at providing a multistage guide vane static mixer. Each vane body comprises a central surface vane and N side vanes; the central surface vanes are in regular n-gon shapes; the N edges of the central surface vanes are the lower bottom edges of the N side vanes; the N side vanes face towards the same direction; and angles between the side vanes and the central surface vane are the same and between 100 degrees and 170 degrees; a connecting rod is fixedly sleeved with the vane bodies by the respective central surface vanes; the central surface vanes of the different vane bodies are the same in size; angles between the central surface vanes of the adjacent vane bodies are 180 degrees / N; the central surface vane of the first vane body is fixed with a support ring by support ribs; and the support ring is connected with an internal wall of a pipeline for mixing. The mixer is matched with a mode of injecting a reducer from the center of the pipeline, so that the reducer and smoke can be effectively mixed, the reducer at the center of the pipeline is dispersed outwards gradually, and a uniform state is finally achieved.

Description

technical field [0001] The invention relates to a fluid mixing device, in particular to a fluid mixing device suitable for the way that the reductant of the SCR system is injected from the center of the pipeline. Background technique [0002] The pollution of the atmospheric environment caused by nitrogen oxides (NOx) in the exhaust gas of marine diesel engines has aroused widespread concern in the international community. In order to limit the environmental pollution caused by marine diesel engine emissions, the International Maritime Organization (IMO) adopted the International Convention for the Prevention of Air Pollution from Ships in 1997 and promulgated it as Annex VI of the MARPOL73 / 78 Convention. For Tier III emission regulations, marine diesel engines can meet the requirements of regulations through SCR technology. [0003] In order to fully atomize the reducing agent sprayed by the nozzle in front of the reactor and prevent the reducing agent from condensing and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F5/00B01F3/04B01D53/92B01D53/56
Inventor 肖友洪田新娜张文平张新玉明平剑柳贡民曹贻鹏
Owner HARBIN ENG UNIV