CN211384578U - Novel static mixer suitable for liquid - Google Patents

Abstract

The utility model discloses a novel static mixer suitable for liquid, including the blender shell, be provided with the first spiral mixing unit, first spiral inner rib pipe, second spiral mixing unit, the inner rib pipe of second spiral that connect gradually in the blender shell, the rotation of first spiral inner rib pipe is different to revolving to with the inner rib pipe of second spiral, the rotation of first spiral mixing unit and first spiral inner rib pipe is the same, the rotation of second spiral mixing unit and second spiral inner rib pipe is the same. The beneficial effects of the utility model reside in that, the utility model discloses under the prerequisite of having realized high mixing efficiency, through introducing two sections spiral inner rib pipes, reduced the resistance of blender, be favorable to the mixture of the liquid phase solution of low pressure head source.

Description

Novel static mixer suitable for liquid

Technical Field

The utility model relates to a clean coal power generation technical field, concretely relates to novel static mixer suitable for liquid.

Background

The static mixer is a mixer which is developed in the beginning of the 70 th 20 th century, the static mixer which is developed and developed by the Kaneys company in the United states in 1970 is firstly introduced, and domestic enterprises do not introduce themselves after the 80 th 20 th century. Static mixers are advanced unit devices that, unlike agitators, have no moving parts inside and use mainly fluid flow and internal units to achieve mixing of various fluids.

In a static mixer, the motion of the fluid follows a "split-shift-overlap" law, with the shift being the primary contributor to the mixing process. The static mixer is widely applied to a plurality of industries such as plastics, chemical industry, medicine, mining and metallurgy, food, daily chemicals, pesticides, cables, petroleum, papermaking, chemical fibers, biology, environmental protection and the like.

The existing static mixer usually adopts different types of fixed static mixing modules placed in a pipeline, particularly the rotating piece is the most common. However, mixers using this configuration typically have a lower mixing efficiency and require longer mixing sections to achieve better mixing, which in turn can result in a significant increase in the drag pressure drop across the mixer section.

For a non-catalytic reduction (SNCR) system adopting an ammonia water solution or a urea solution as a denitration reducing agent, the mixing of the ammonia water solution or the urea solution and demineralized water has obvious influence on the subsequent SNCR denitration effect. For some existing coal-fired boilers, the pressure head of an ammonia water conveying pump which is configured is low or a pipeline is long, so that the injection pressure of the reducing agent solution which is mixed by a mixer and reaches an SNCR spray gun is too low, and a good SNCR denitration effect cannot be achieved. Therefore, a static mixer with good mixing effect and low resistance per unit length is urgently needed.

The mixing action of the existing static mixer for placing the twisted belt type rotating piece mainly occurs in a central area, and the mixing effect of fluid in a boundary layer area close to a pipe wall is insufficient, so that the whole mixing effect of the static mixer is influenced.

The dispersed phase of the existing mixer is usually arranged in the upper area of a static mixing unit and enters a mixer pipeline, for the dispersed phase mixing of various viscosity physical properties, each dispersed phase is connected to the same mixing position, and some mixed substances can generate chemical reaction in advance without entering the static mixer, so that the final mixing effect is not ideal.

SUMMERY OF THE UTILITY MODEL

To the not enough among the prior art, the utility model aims at providing a novel static mixer suitable for liquid, the resistance of static mixer is high among the solution prior art, problem that mixing efficiency is low.

In order to achieve the above object, the utility model provides a novel static mixer suitable for liquid, including the blender shell, be provided with the first spiral mixing element, first spiral inner rib pipe, second spiral mixing element, the inner rib pipe of second spiral that connect gradually in the blender shell, the rotation of first spiral mixing element and first spiral inner rib pipe is the same, the rotation of first spiral inner rib pipe is different to the rotation with second spiral mixing element, the rotation of second spiral mixing element and second spiral inner rib pipe is the same.

Further, the inner diameters of the first spiral inner rib pipe and the second spiral inner rib pipe are the same; the diameter of the first spiral mixing unit is the same as the maximum inner diameter of the first spiral inner ribbed pipe, and the diameter of the second spiral mixing unit is the same as the maximum inner diameter of the second spiral inner ribbed pipe.

Further, the rotation direction of the first spiral mixing unit is a left spiral or a right spiral, and the rotation direction of the second spiral mixing unit is different from the rotation direction of the first spiral mixing unit;

the values of the spiral lifting angles of the first spiral mixing unit and the second spiral mixing unit are both 30-65 degrees.

Furthermore, the first spiral mixing unit and the first spiral inner ribbed pipe have the same spiral angle direction, and the second spiral mixing unit and the second spiral inner ribbed pipe have the same spiral angle direction.

Furthermore, the values of the spiral inclination angles of the first spiral mixing unit and the second spiral mixing unit are both 55-75 degrees.

Further, the inner diameters of the first spiral inner rib pipe and the second spiral inner rib pipe are the same.

Further, the mixer also comprises an inlet flange and an outlet flange which are arranged at two ends of the mixer shell; the inlet flange is provided with a first dispersed phase fluid inlet.

Further, the first spiral mixing unit, the first spiral inner rib pipe, the second spiral mixing unit, the second spiral inner rib pipe that connect gradually constitute a set of mixing module, the blender is provided with a plurality of groups of mixing modules that connect gradually, and the second spiral inner rib pipe in the mixing module of current group is connected with the first spiral mixing unit in the lower group of mixing module.

Preferably, a plurality of second dispersed phase fluid inlets are formed in the mixer shell close to the inlet flange, and one ends of the second dispersed phase fluid inlets extend into the first spiral inner ribbed pipes or the second spiral inner ribbed pipes.

Preferably, the mixer housing, the first spiral mixing unit, the first spiral inner ribbed pipe, the second spiral mixing unit and the second spiral inner ribbed pipe are all made of stainless steel materials.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

the utility model provides a novel static mixer suitable for liquid, and the friction resistance coefficient of the common inner ribbed pipe is usually between 0.03 and 0.15; and to common torsion piece formula mixing unit, its frictional resistance coefficient is usually between 1.5 ~ 4, the utility model discloses a set up the different spiral inner rib pipe of spiral direction, under same internal diameter, the resistance that the liquid of equal average velocity of flow flows through the inner rib pipe of unit length is far less than the torsion piece formula mixing unit of unit length, has reduced the resistance of blender, is favorable to the mixture of the liquid phase solution of low pressure head source, especially solves the problem that the injection pressure that reducing agent solution reachs the SNCR spray gun after the blender mixes is too low and can not reach good SNCR denitration effect;

furthermore, in the existing static mixer, the mixing action mainly occurs in the central area of the pipe body, and the mixing effect of the fluid in the boundary layer area close to the pipe wall is not sufficient, which affects the overall mixing effect of the static mixer; the utility model discloses a static mixer on the basis that the central region's that has kept current blender fluid can the intensive mixing, through the screw rib cooperation spiral unit of inner rib pipe, the intensive mixing has pressed close to the fluid in pipe wall boundary layer region to further improved mixing efficiency, strengthened mixed effect.

Further, when the workplace that requires low to the pressure drop when mixing effectually, the utility model discloses a static mixer improves mixed effect through the mode of rib pipe in the first spiral of a plurality of alternate connection and the rib pipe in the second spiral.

Further, the utility model discloses a rib pipe all adopts stainless steel material in blender shell, first spiral mixing unit, first spiral, second spiral mixing unit and the second spiral, and overall structure has the anticorrosion function.

The utility model discloses a static mixer has seted up second disperse phase fluid entry on being close to the blender shell of entry flange, has realized continuing to introduce the purpose of new disperse phase fluid on the blender shell, and the disperse phase of having avoided taking place chemical reaction mixes in advance, can not reach the mixed effect of experimental requirement, and the mode that different disperse phases added in different regions is favorable to being arranged by the flexibility of disperse phase pipeline in the practical application simultaneously.

Drawings

FIG. 1 is a schematic view of the present invention in a partial cross-sectional structure;

fig. 2 is a schematic view of a partial cross-sectional structure according to an embodiment of the present invention.

In the drawings: 1-mixer housing, 2-first spiral mixing unit, 3-second spiral mixing unit, 4-first spiral inner ribbed pipe, 5-second spiral inner ribbed pipe, 6-inlet flange, 7-outlet flange, 8-second dispersed phase fluid inlet.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings and examples.

As shown in fig. 1, the utility model provides a novel static mixer suitable for liquid, which comprises a mixer housing 1, wherein the mixer housing 1 is a circular pipeline; a first spiral mixing unit 2, a first spiral inner ribbed pipe 4, a second spiral mixing unit 3 and a second spiral inner ribbed pipe 5 which are connected in sequence are arranged in the mixer shell, the rotating directions of the first spiral mixing unit 2 and the first spiral inner ribbed pipe 4 are the same, and the rotating directions of the second spiral mixing unit 3 and the second spiral inner ribbed pipe 5 are the same; the spiral direction of the first spiral inner ribbed pipe 4 is different from that of the second spiral mixing unit 3. Wherein, in a certain embodiment of the present invention, the first spiral mixing unit 2 and the second spiral mixing unit 3 of the present invention are helical blades. Wherein, in a certain embodiment of the present invention, the first spiral mixing unit 2 and the second spiral mixing unit 3 of the present invention are helical blades.

The inner diameters of the first spiral inner ribbed tube 4 and the second spiral inner ribbed tube 5 are the same; the diameter of the first spiral mixing unit 2 is the same as the maximum inner diameter of the first spiral inner ribbed pipe 4, and the diameter of the second spiral mixing unit 3 is the same as the maximum inner diameter of the second spiral inner ribbed pipe 5; the screw ribs of the first spiral internally ribbed tube 4 and the second spiral internally ribbed tube 5 respectively fit the screw blades of the first spiral unit 2 and the screw blades of the second spiral unit 3.

The utility model also comprises an inlet flange 6 and an outlet flange 7 which are arranged at the two ends of the mixer shell; the inlet flange 6 is a first dispersed phase fluid inlet.

The rotating direction of the first spiral mixing unit 2 is a left spiral or a right spiral, and the rotating direction of the second spiral mixing unit 3 is different from that of the first spiral mixing unit 2; the values of the spiral lifting angles of the first spiral mixing unit 2 and the second spiral mixing unit 3 are both 30-65 degrees, and the spiral lifting angle directions of the first spiral mixing unit 2 and the first spiral inner rib pipe 4 are consistent; the helix angle directions of the second helical mixing unit 3 and the second helical inner ribbed tube 5 are consistent.

The values of the spiral inclination angles of the first spiral mixing unit 2 and the second spiral mixing unit 3 are both 55-75 degrees.

The utility model discloses a material that rib pipe 5 chooseed for use in blender shell 1, first spiral mixing unit 2, first spiral inner rib pipe 4, second spiral mixing unit 3 and the second spiral is corrosion-resistant stainless steel material.

In one embodiment of the present invention, the first spiral mixing unit 2 and the first spiral inner rib pipe 4 have the same length, and the second spiral mixing unit 3 and the second spiral inner rib pipe 5 have the same length.

The utility model discloses an in certain embodiment, when requiring insensitive workplace to the pressure drop simultaneously to mixing effectual, first spiral mixing unit 2, first spiral inner rib pipe 4, second spiral mixing unit 3, second spiral inner rib pipe 5 constitute a set of mixing module, the blender is provided with a plurality of groups of mixing modules that connect gradually, and second spiral inner rib pipe 5 in the mixing module of present group is connected with first spiral mixing unit 2 in the mixing module of lower group.

In an embodiment of the present invention, 3 sets of mixing modules connected in sequence are disposed in the mixer housing, and the lengths of the three sets of mixing modules are different.

The utility model discloses seted up a plurality of second dispersed phase fluid entry 8 on the blender shell 1 that is close to entry flange 6, second dispersed phase fluid entry 8 one end stretches into in first spiral inner rib pipe 4 or the second spiral inner rib pipe 5.

As shown in fig. 2 is the structural schematic diagram of a certain embodiment of the utility model, second disperse phase fluid entry 8 has been seted up on the first spiral inner rib pipe that is close to entry flange 6, the purpose of continuing to introduce new disperse phase fluid on blender shell 1 has been realized, the disperse phase that can take place chemical reaction mixes in advance, can not reach the mixed effect of experimental requirement, the mode of different disperse phases joining in different regions has been realized, be favorable to in practical application by the nimble arrangement of disperse phase pipeline.

For common inner ribbed pipes, the friction resistance coefficient is usually between 0.03 and 0.15; and to common torsion sheet formula mixing unit, its frictional resistance coefficient is usually between 1.5 ~ 4, the utility model discloses a set up the spiral inner rib pipe of turning to the difference, under same internal diameter, the resistance that the liquid of equal average velocity of flow flowed through the inner rib pipe of unit length is far less than the torsion sheet formula mixing unit of unit length, has reduced the resistance of blender, is favorable to the mixture of the liquid phase solution of low pressure head source, especially solves the problem that the injection pressure that reducing agent solution reachs the SNCR spray gun after the blender mixes crosses lowly and can not reach good SNCR denitration effect.

Claims (9)

1. The utility model provides a novel static mixer suitable for liquid, its characterized in that, includes blender shell (1), be provided with first spiral mixing unit (2), first spiral inner rib pipe (4), second spiral mixing unit (3), second spiral inner rib pipe (5) that connect gradually in blender shell (1), the direction of turning round of first spiral mixing unit (2) and first spiral inner rib pipe (4) is the same, the direction of turning round of first spiral inner rib pipe (4) is different with the direction of turning round of second spiral mixing unit (3), the direction of turning round of second spiral mixing unit (3) and second spiral inner rib pipe (5) is the same.

2. The new static mixer for liquids according to claim 1, characterized by the fact that the internal diameter of the first helical internally ribbed tube (4) and of the second helical internally ribbed tube (5) is the same;

the diameter of the first spiral mixing unit (2) is the same as the maximum inner diameter of the first spiral inner ribbed pipe (4), and the diameter of the second spiral mixing unit (3) is the same as the maximum inner diameter of the second spiral inner ribbed pipe (5).

3. The new static mixer for liquids according to claim 1 is characterized by the fact that the direction of rotation of the first spiral mixing unit (2) is either left or right spiral and the direction of rotation of the second spiral mixing unit (3) is opposite to the direction of rotation of the first spiral mixing unit (2);

the values of the helix angles of the first helical mixing unit (2) and the second helical mixing unit (3) are both 30-65 degrees.

4. A new static mixer for liquids as in claim 3, characterized by the fact that the helix angle direction of the first helical mixing unit (2) and the first helical internally ribbed tube (4) is identical, and the helix angle direction of the second helical mixing unit (3) and the second helical internally ribbed tube (5) is identical.

5. A new static mixer for liquids as claimed in claim 3, characterized by the fact that the angles of inclination of the spirals of said first spiral mixing element (2) and of said second spiral mixing element (3) both range from 55 ° to 75 °.

6. The new static mixer for liquids as claimed in claim 1, characterized by further comprising an inlet flange (6) and an outlet flange (7) mounted at both ends of the mixer housing (1); the inlet flange (6) is provided with a first dispersed phase fluid inlet.

7. The new static mixer for liquid as claimed in claim 1, wherein the first spiral mixing unit (2), the first spiral inner ribbed tube (4), the second spiral mixing unit (3) and the second spiral inner ribbed tube (5) connected in sequence form a group of mixing modules, several groups of mixing modules connected in sequence are arranged in the mixer housing (1), and the second spiral inner ribbed tube (5) in the current group of mixing modules is connected with the first spiral mixing unit (2) in the next group of mixing modules.

8. A new static mixer for liquids as defined in claim 6 or 7, characterised by that the mixer housing (1) near the inlet flange (6) is provided with several second dispersed phase fluid inlets (8), one end of the second dispersed phase fluid inlets (8) extending into the first (4) or second (5) spiral internally ribbed tubes.

9. The new static mixer for liquids as claimed in claim 1, characterized by that, the mixer housing (1), the first helical mixing unit (2), the first helical inner ribbed tube (4), the second helical mixing unit (3) and the second helical inner ribbed tube (5) are made of stainless steel material.

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