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Twisting crossover-type static mixer

A static mixer and leap-forward technology, which is applied in the direction of fluid mixers, mixers, chemical instruments and methods, etc., can solve the problems of long mixer length and large pressure loss, and achieve short mixer length and reduced pressure loss Effect

Inactive Publication Date: 2014-03-05
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing static mixer achieves the ideal mixing effect, the required length of the mixer is longer, resulting in a larger pressure loss, such as the SK static mixer

Method used

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  • Twisting crossover-type static mixer
  • Twisting crossover-type static mixer
  • Twisting crossover-type static mixer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] combine Figure 1~3 , the axis of the present invention coincides with the axis of the pipeline 1, and the mixer is fixed on the inner wall of the pipeline 1 by the fixing part 2. The mixer is high temperature resistant, corrosion resistant metal or non-metal. The mixer is connected by several identical torsion blades 3 according to their rotation axes to form a helix with a certain lead and direction of rotation. The cross-section of the twisted blade 3 is rectangular or curved. The outer contour line of the twisted blade 3 is connected by several identical arcs 4, and the twisted blade 3 forms an arc-shaped groove 5 at the junction of the arcs 4, and the starting point to the end point of each arc 4 is on the radial plane. The relationship between the projection angle and the number of twisted blades 3 satisfies: projection angle=1800 / number of twisted blades. Several uniform and identical spiral channels are formed between several identical twisted blades 3 and th...

Embodiment approach 2

[0019] The twisted straddle static mixer is placed in the pipeline 1, and its central axis coincides with the axis of the pipeline 1, and the mixer is clamped and fixed on the inner wall of the pipeline 1 by the fixing member 2. The twisted straddling static mixer is composed of four identical twisted blades 3 connected according to their rotation axes to form a helix with a certain lead and direction of rotation. Between the four twisted blades 3 and the inner wall of the pipe 1, four uniform and identical spiral flow channels are formed. The twisted blade 3 is right-handed, and its cross section is rectangular, such as figure 2 shown. The outer contour line of each twisted blade 3 is composed of 4 identical arcs 4 connected, and arc grooves 5 are formed at the junctions of the arcs 4, and the starting point to the end point of each arc 4 is on the radial plane. The projection angle is 45 degrees. The helix angle of the twisted blades is 37 degrees.

[0020] When the flu...

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Abstract

The invention aims to provide a twisting crossover-type static mixer. The twisting crossover-type static mixer comprises twist blades which are fixedly arranged in a pipeline for mixing, wherein N twist blades are arranged; an outline line of each twist blade comprises an arc part on the upper part, and line section parts on the lower part and the two ends; the twist blades are connected by the respective line section parts on the lower parts; each arc part on the upper part comprises four sections of arcs and an arc-shaped groove is formed in the connection part of the adjacent arcs; each arc part is wholly rotated leftwards or rightwards along an inlet of a pipeline; a projection angle of each arc part in a radial plane is equal to 180 degrees / N; N spiral runners which are uniformly distributed along the periphery are formed among the N twist blades and the inner wall of the pipeline. According to the twisting crossover-type static mixer, for the twist blades, the arc-shaped grooves are formed in the connection parts of the arcs, so that the pressure loss of the mixture is reduced; meanwhile, fluid is collected and collided on the arc-shaped grooves and is split again, so that the fluid is mixed uniformly, the same mixing effect is realized and the needed length of the mixer is short.

Description

technical field [0001] The invention relates to a fluid mixing device, in particular to a fluid mixing device used in front of an SCR system reactor. Background technique [0002] With the increasingly stringent emission regulations of ships, how to reduce the content of nitrogen oxides (NOx) in diesel engine flue gas has become a global hot issue. The denitrification rate of SCR technology can reach more than 80%. The principle is that the reducing agent injected into the flue gas reacts with NOx under the action of the catalyst to form nitrogen and water. Therefore, the primary consideration in the application of SCR technology is the mixing of reducing agent and flue gas. For this reason, many SCR systems are equipped with static mixers in the pipeline before the reactor. [0003] For existing static mixers, when the ideal mixing effect is achieved, the length of the required mixer is relatively long, resulting in relatively large pressure loss, such as the SK type stati...

Claims

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Application Information

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IPC IPC(8): B01F5/00
Inventor 张文平田新娜肖友洪
Owner HARBIN ENG UNIV