CN111054229A - Ventilation air methane and low-concentration gas static mixer with suction function - Google Patents
Ventilation air methane and low-concentration gas static mixer with suction function Download PDFInfo
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- CN111054229A CN111054229A CN201910082430.5A CN201910082430A CN111054229A CN 111054229 A CN111054229 A CN 111054229A CN 201910082430 A CN201910082430 A CN 201910082430A CN 111054229 A CN111054229 A CN 111054229A
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- concentration gas
- shell
- ventilation air
- static mixer
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- 238000009423 ventilation Methods 0.000 title claims abstract description 49
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 230000003068 static effect Effects 0.000 title claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 44
- 238000004378 air conditioning Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 101100008050 Caenorhabditis elegans cut-6 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
Abstract
The invention provides a static mixer of ventilation air methane and low-concentration gas with a suction function, wherein one end of a shell is a ventilation air methane inlet, and the other end of the shell is a mixed gas outlet; at least one low-concentration gas suction pipe is inserted into the shell along the radial direction of the shell; at least one mixing disturbance plate is correspondingly arranged on an extension line of a central axis of the low-concentration gas suction pipe one by one, an included angle of 45 +/-3 degrees is formed between the plane of the mixing disturbance plate and the central axis of the shell, and the outlet end of the low-concentration gas suction pipe is arranged in a vortex area on the back surface of the mixing disturbance plate.
Description
Technical Field
The invention relates to a static mixer for ventilation air methane and low-concentration gas.
Background
In the field of coal mine ventilation air methane oxidation power generation, in the process of conveying and mixing ventilation air methane and low-concentration gas, a mixer is a core device of the whole mixing system and is used for uniformly mixing the ventilation air methane and the low-concentration gas so as not to generate a layering phenomenon and enable the concentration of the mixed gas to meet the design requirement.
Through research and development, some mixers used in the engineering field at present have some defects, for example, a double-helical-blade mixer is arranged at the downstream of a ventilation air and low-concentration gas mixing system pipeline, and the resistance of a mixer body is extremely large, so that the full pressure of a fan is greatly increased, the mixer is completely not energy-saving, and even sometimes the system cannot run; there is also a grid type (or vortex type) mixer which is not ideal in blending effect (for example, the distance required for blending to be uniform and not to be layered is relatively long), and such a mixer is arranged with enough space for a pipeline downstream of a blending system to be used, or is not used, so that if the arrangement length is increased, the investment cost is increased, and some projects cannot use such a mixer due to limited space.
Disclosure of Invention
The invention provides a static mixer for ventilation air methane and low-concentration gas with a suction function, and aims to reduce the body resistance and shorten the mixing distance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a static mixer of ventilation air and low-concentration gas with suction function, comprising:
the air-conditioning system comprises a shell, a fan air inlet, a mixed gas outlet and a fan, wherein one end of the shell is provided with the fan air inlet, the other end of the shell is provided with the mixed gas outlet, the shell is provided with an axial direction from the fan air inlet to the mixed gas outlet, and the shell is also provided with a radial direction perpendicular to the axial direction;
the low-concentration gas suction pipes are distributed at intervals along the axial direction of the shell and are inserted into the shell along the radial direction of the shell, one end, positioned outside the shell, of each low-concentration gas suction pipe is a gas inlet, and one end, inserted into the shell, of each low-concentration gas suction pipe is an open end;
and the mixed disturbance plate is fixed in the shell and is arranged on an extension line of the central axis of the at least one low-concentration gas suction pipe in a one-to-one correspondence mode, the plane where the mixed disturbance plate is located and the central axis of the shell form an included angle of 45 +/-3 degrees, and the inclination direction of the mixed disturbance plate is that the corresponding low-concentration gas suction pipe and the ventilation air inlet are respectively positioned on two sides of the mixed disturbance plate.
The static mixer for ventilation air methane and low-concentration gas with the suction function is characterized in that the plane geometric center point of the mixing disturbance plate is positioned on the extension line of the central axis of the corresponding low-concentration gas suction pipe.
The static mixer for ventilation air methane and low-concentration gas with the pumping function is characterized in that the distance between the geometric center point of the plane of the mixing disturbance plate and the end face of the open end of the corresponding low-concentration gas suction pipe is 0.8-1 times of the inner diameter of the low-concentration gas suction pipe.
The static mixer for ventilation air and low-concentration gas with the pumping function is provided with a plurality of mixing disturbance plates, and adjacent mixing disturbance plates form mutual shielding without contact at adjacent end positions.
The ventilation air methane and low-concentration gas static mixer with the suction function is characterized in that the low-concentration gas suction pipes are parallel to each other.
Ventilation air methane and low concentration gas static mixer with suction function, wherein, the scarf is established in one side of the mist outlet of open end orientation casing, the scarf has striden at least half area of open end, moreover the scarf with the contained angle that has 30 + -5 degrees between the end plane of open end.
The static mixer for ventilation air methane and low-concentration gas with the suction function is characterized in that the mixing disturbance plate is provided with a circular base plate, and two circular arc-shaped protruding pieces are respectively formed at two ends of the base plate in an inclined position.
The static mixer for ventilation air and low-concentration gas with the suction function is characterized in that the diameter of the base plate is 0.6-0.8 times of the inner diameter of the shell, and the diameter of the circular arc lug is 0.4-0.6 times of the inner diameter of the shell.
The ventilation air methane and low-concentration gas static mixer with the suction function is characterized in that a plurality of supporting pieces are arranged on the inner wall of the shell, each supporting piece is provided with a bayonet, and the mixing disturbance plate is embedded into the bayonet and fixed.
The static mixer for ventilation air and low-concentration gas with the suction function is characterized in that one end, opposite to the mixing disturbance plate, of the supporting piece is fixedly connected with the backing plate, and the backing plate is welded and fixed on the inner wall of the shell.
Therefore, the invention provides the ventilation air methane and low-concentration gas static mixer with the pumping function, the resistance of the body is greatly reduced (not more than 200Pa), and the low-concentration gas pumping function (providing new kinetic energy) is realized, so that the energy is greatly saved (becoming an energy-saving and environment-friendly mixer); on the other hand, the blending effect is obviously improved (the distance required for blending uniformity is greatly shortened, and the investment cost is saved), so that a solution is provided for a blending system with insufficient space arrangement.
Drawings
FIG. 1 is a longitudinal sectional view of a static mixer for ventilation air and low-concentration gas with a pumping function provided by the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic plan view of a hybrid turbulator plate;
fig. 4 is a side view of an open end of a gas suction pipe;
FIG. 5 is a schematic view of a combination structure of the hybrid spoiler and the support member.
Description of reference numerals: a housing 1; a ventilation air inlet 2; a mixed gas outlet 3; a low-concentration gas suction pipe 4; an open end 5; a chamfer cut 6; a mixing disturbance plate 7; a vortex region 8; a substrate 9; a circular arc-shaped lug 10; a support 11; a bayonet 12; a backing plate 13.
Detailed Description
Some specific embodiments of the invention will be described in detail below, by way of example and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
The low-concentration gas in the invention refers to coal mine gas with methane volume concentration more than or equal to 3% and less than 30%; the ventilation air methane refers to coal mine gas with volume concentration lower than 0.75% discharged from a coal mine ventilation shaft.
As shown in fig. 1 and 2, the present invention provides a static mixer for ventilation air and low-concentration gas with a suction function, comprising:
a casing 1, preferably a cylindrical body, having flanges at both ends thereof for being butted against a ventilation air supply pipe and a mixed gas exhaust pipe (both not shown), wherein one end is a ventilation air inlet 2 and the other end is a mixed gas outlet 3, so that the casing 1 has an axial direction from the ventilation air inlet 2 to the mixed gas outlet 3 and a radial direction perpendicular to the axial direction; the wall thickness of the shell 1 is generally 5-7mm, the diameter is determined according to the total air volume after the ventilation air methane and the low-concentration gas are mixed and the given economic flow rate, the wall thickness is generally between 4500 and 5500mm, and the economic flow rate is between 12 and 15 m/s;
at least one low-concentration gas suction pipe 4 with the diameter of 750 and 850mm, which is distributed along the axial direction of the shell 1 at intervals, wherein the at least one low-concentration gas suction pipe 4 is inserted into the shell 1 along the radial direction of the shell 1 in parallel, one end of the low-concentration gas suction pipe outside the shell 1 is provided with a flange so as to be convenient for butt joint with a low-concentration gas supply pipeline (not shown), one end inserted into the shell 1 is an open end 5, and one side of the open end 5 facing the mixed gas outlet 3 of the shell 1 is provided with a bevel notch 6;
mixing turbulence plates 7, the number of which is equal to that of the at least one low-concentration gas suction pipe 4, are fixed in the housing 1 and are arranged in one-to-one correspondence with the at least one low-concentration gas suction pipe 4, the geometric center point of the plane of the mixing turbulence plates 7 is located on the extension line of the central axis of the corresponding low-concentration gas suction pipe 4 (the distance is 0.8-1 times the inner diameter of the low-concentration gas suction pipe 4), the plane of the mixing turbulence plates 7 is at an included angle of 45 +/-3 degrees with the central axis of the housing 1, and the inclination direction of the mixing turbulence plates 7 is such that the corresponding low-concentration gas suction pipe 4 and the ventilation air inlet 2 are respectively located at two sides of the mixing turbulence plates 7;
in the case of a plurality of mixing baffles 7, adjacent mixing baffles 7 are preferably shielded from each other at adjacent end positions, thereby improving mixing efficiency.
When the mixed gas mixing device is used, when ventilation air flows from the direction of the ventilation air inlet 2 of the shell 1 to the direction of the mixed gas outlet 3 at a high speed, negative pressure is formed on one surface of the mixed disturbance plate 7, which is back to the ventilation air inlet 2, namely a vortex region 8 is generated at the geometric central point of the plane of the surface of the mixed disturbance plate 7, which is back to the ventilation air inlet 2, so that gas of the low-concentration gas suction pipe 4 is sucked into the shell 1 and is mixed with the ventilation air strongly and quickly in the vortex region 8, the ventilation air and the low-concentration gas are not layered, and the mixed gas mixing device has the advantages of good mixing effect, short mixing distance and small resistance (about 180 Pa).
Referring to fig. 3, which is a schematic plan view of the hybrid spoiler 7, the hybrid spoiler 7 has a circular base plate 9, the diameter of the base plate 9 is 0.6 to 0.8 times the inner diameter of the housing 1, circular arc-shaped protruding pieces 10 are respectively formed at both ends of the base plate 9 at an inclined position, and the diameter of the circular arc-shaped protruding pieces 10 is 0.4 to 0.6 times the inner diameter of the housing 1. Through fluid mechanics simulation, the mixing disturbing plate 7 with the shape can improve the mixing efficiency by 1-2 times compared with a circular disturbing plate.
Fig. 4 shows a side view of the open end 5 of the gas suction pipe 4, the side of the open end 5 facing the mixed gas outlet 3 of the housing 1 is further provided with a chamfered notch 6, the chamfered notch 6 spans at least half of the area of the open end 5, and the chamfered notch 6 forms an angle of 30 ± 5 degrees with the end plane of the open end 5. By means of the chamfered notch 6, it is possible to better guide the flow of low-concentration gas along the front surface of the mixing disturbance plate 7.
As shown in fig. 5, which is a schematic view of a fixing structure of the hybrid disturbance plate 7, a plurality of support members 11 are provided on an inner wall of the housing 1, the support members 11 are preferably steel pipes, a bayonet 12 is provided on the support members 11, and the hybrid disturbance plate 7 is fitted into the bayonet 12 and fixed; wherein, one end of the support member 11 opposite to the hybrid disturbance plate 7 is fixedly connected with a backing plate 13, and the backing plate 13 is welded and fixed on the inner wall of the shell 1, so as to ensure that the whole installation system is firm and reliable.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A static mixer of ventilation air and low-concentration gas with suction function, comprising:
the air-conditioning system comprises a shell, a fan air inlet, a mixed gas outlet and a fan, wherein one end of the shell is provided with the fan air inlet, the other end of the shell is provided with the mixed gas outlet, the shell is provided with an axial direction from the fan air inlet to the mixed gas outlet, and the shell is also provided with a radial direction perpendicular to the axial direction;
the low-concentration gas suction pipes are distributed at intervals along the axial direction of the shell and are inserted into the shell along the radial direction of the shell, one end, positioned outside the shell, of each low-concentration gas suction pipe is a gas inlet, and one end, inserted into the shell, of each low-concentration gas suction pipe is an open end;
and the mixed disturbance plate is fixed in the shell and is arranged on an extension line of the central axis of the at least one low-concentration gas suction pipe in a one-to-one correspondence mode, the plane where the mixed disturbance plate is located and the central axis of the shell form an included angle of 45 +/-3 degrees, and the inclination direction of the mixed disturbance plate is that the corresponding low-concentration gas suction pipe and the ventilation air inlet are respectively positioned on two sides of the mixed disturbance plate.
2. The ventilation air methane and low concentration gas static mixer with suction function according to claim 1, wherein the plane geometric center point of the mixing spoiler is located on an extension line of the central axis of the corresponding low concentration gas suction pipe.
3. The ventilation air-methane and low-concentration gas static mixer with suction function according to claim 2, wherein the distance between the geometrical center point of the plane of the mixing baffle plate and the end surface of the open end of the corresponding low-concentration gas suction pipe is 0.8 to 1 times the inner diameter of the low-concentration gas suction pipe.
4. The ventilation air-methane and low-concentration gas static mixer with suction function according to claim 1, wherein there are a plurality of said mixing spoiler, and adjacent mixing spoiler form mutual shielding without contact at adjacent end position.
5. The ventilation air methane and low-concentration gas static mixer with suction function according to claim 1, wherein the low-concentration gas suction pipes are parallel to each other.
6. The static mixer of ventilation air and low-concentration gas with suction function according to claim 1, wherein a chamfer is further provided on a side of the open end facing the mixed gas outlet of the housing, the chamfer spanning at least half of the area of the open end, and the chamfer has an angle of 30 ± 5 degrees with respect to an end plane of the open end.
7. The static mixer of ventilation air and low concentration gas with suction function according to claim 1, wherein the mixing disturbing plate has a circular base plate on which a circular arc-shaped lug is formed at both ends in an inclined position.
8. The ventilation air methane and low-concentration gas static mixer with suction function according to claim 7, wherein the base plate has a diameter of 0.6-0.8 times the inner diameter of the housing, and the circular arc-shaped lug has a diameter of 0.4-0.6 times the inner diameter of the housing.
9. The static mixer of ventilation air and low concentration gas with suction function according to claim 1, wherein a plurality of support members are provided on an inner wall of the housing, the support members being provided with bayonets into which the mixing disturbing plate is inserted to be fixed.
10. The static mixer of ventilation air and low concentration gas with suction function according to claim 9, wherein the end of the support member opposite to the mixing disturbing plate is fixedly connected with a backing plate, and the backing plate is welded and fixed on the inner wall of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082430.5A CN111054229A (en) | 2019-01-28 | 2019-01-28 | Ventilation air methane and low-concentration gas static mixer with suction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082430.5A CN111054229A (en) | 2019-01-28 | 2019-01-28 | Ventilation air methane and low-concentration gas static mixer with suction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111054229A true CN111054229A (en) | 2020-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910082430.5A Pending CN111054229A (en) | 2019-01-28 | 2019-01-28 | Ventilation air methane and low-concentration gas static mixer with suction function |
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| Country | Link |
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| CN (1) | CN111054229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117899687A (en) * | 2024-03-20 | 2024-04-19 | 艾仁曼环境技术(上海)有限公司 | Gao Xiaowa S mixing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003039099A (en) * | 2001-07-27 | 2003-02-12 | Mitsubishi Heavy Ind Ltd | Methane fermentation tank |
| CN103623723A (en) * | 2013-12-12 | 2014-03-12 | 中国矿业大学 | Self-absorption spiral-flow type coal mine pumped gas and ventilation air methane mixing device |
| CN203525581U (en) * | 2013-10-09 | 2014-04-09 | 株洲凯天环保科技有限公司 | Pipe-plate type gas injection mixing device |
| CN105381694A (en) * | 2015-12-07 | 2016-03-09 | 兴边富民（北京）清洁能源技术有限公司 | Blending and treating system for ventilation air methane and drainage methane in coal mine |
| CN205269428U (en) * | 2015-12-29 | 2016-06-01 | 中煤科工集团重庆研究院有限公司 | Coal mine gas mixes system of disposition all |
| CN209885605U (en) * | 2019-01-28 | 2020-01-03 | 河北寰球工程有限公司 | Ventilation air methane and low-concentration gas static mixer with suction function |
-
2019
- 2019-01-28 CN CN201910082430.5A patent/CN111054229A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003039099A (en) * | 2001-07-27 | 2003-02-12 | Mitsubishi Heavy Ind Ltd | Methane fermentation tank |
| CN203525581U (en) * | 2013-10-09 | 2014-04-09 | 株洲凯天环保科技有限公司 | Pipe-plate type gas injection mixing device |
| CN103623723A (en) * | 2013-12-12 | 2014-03-12 | 中国矿业大学 | Self-absorption spiral-flow type coal mine pumped gas and ventilation air methane mixing device |
| CN105381694A (en) * | 2015-12-07 | 2016-03-09 | 兴边富民（北京）清洁能源技术有限公司 | Blending and treating system for ventilation air methane and drainage methane in coal mine |
| CN205269428U (en) * | 2015-12-29 | 2016-06-01 | 中煤科工集团重庆研究院有限公司 | Coal mine gas mixes system of disposition all |
| CN209885605U (en) * | 2019-01-28 | 2020-01-03 | 河北寰球工程有限公司 | Ventilation air methane and low-concentration gas static mixer with suction function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117899687A (en) * | 2024-03-20 | 2024-04-19 | 艾仁曼环境技术(上海)有限公司 | Gao Xiaowa S mixing device |
| CN117899687B (en) * | 2024-03-20 | 2024-05-31 | 艾仁曼环境技术(上海)有限公司 | Gao Xiaowa S mixing device |
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