CN202176360U - Rotary flow type gas drainage dilution mixer for coal mines - Google Patents
Rotary flow type gas drainage dilution mixer for coal mines Download PDFInfo
- Publication number
- CN202176360U CN202176360U CN2011203088618U CN201120308861U CN202176360U CN 202176360 U CN202176360 U CN 202176360U CN 2011203088618 U CN2011203088618 U CN 2011203088618U CN 201120308861 U CN201120308861 U CN 201120308861U CN 202176360 U CN202176360 U CN 202176360U
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- housing
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- inlet tube
- divergent channel
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Abstract
The utility model relates to a rotary flow type gas drainage dilution mixer for coal mines, which comprises a casing, an inlet pipe and an expansion pipe, wherein the inlet pipe is a 90-degree bent pipe. An inlet end of the inlet pipe is arranged outside the casing, a straight pipe section arranged at the inlet end vertically penetrates into the casing, a straight pipe section arranged at an outlet end is horizontally arranged in the casing and connected with the expansion pipe to face to an outlet end of the casing. The rotary flow type gas drainage dilution mixer for the coal mines is characterized in that inner helical blades, outer helical blades, reinforcing ribs and a flow-guiding cone are additionally arranged, the flow-guiding cone is in a cone structure and is located in the expansion pipe, and a sharp head of the flow-guiding cone backs on an outlet end of the expansion pipe. The expansion pipe, the casing and the flow-guiding cone are fixedly connected with each other through the reinforcing ribs, the inlet pipe is close to the straight pipe section arranged at the outlet end, the axis of the expansion pipe and the axis of the flow-guiding cone are located at the axial center of the casing, the inner helical blades are installed in the straight pipe section of the inlet pipe close to the outlet end, and the outer helical blades are installed in a ring-shaped cavity surrounded by a casing inner wall and an outer wall of the straight pipe section of the inlet pipe arranged close to the outlet end. The rotary flow type gas drainage dilution mixer for the coal mines has the advantages of being safe in protection, low in gas drainage conveying energy consumption and the like.
Description
Technical field
The utility model relates to the air feed equipment of coal mine methane gas oxidation device; Relate in particular to a kind of helical blade spiral-flow type diluted mixture device of mash gas extraction, ventilation air gas or air of coal mine methane gas oxidation device, belong to super low concentration methane thermal counter flow oxidation and low-density technical field of energy recovery.
Background technology
The about 49Mt of methane content that mines in the global range and discharge every year accounts for about 9% of the interior discharge of methane total amount of global range.The concentration of methane in atmosphere is in each greenhouse gases fastest-rising one, and because of its strong greenhouse effect, the discharging of methane must receive effective control.The annual mash gas extraction of China is about billion cubic meter more than 50.The mash gas extraction that wherein utilizes only accounts for 1/4～1/3, and all the other all are in emptying state.Particularly concentration is lower than 8% low concentration mash gas extraction and can't carries out civilian or generating utilizes, and has only emptying.These methane that are discharged to the atmosphere not only cause serious atmosphere pollution, and have greatly wasted the energy.
The hot counter flow oxidation device of coal mine methane is the advanced technology that super low concentration methane is utilized, and can carry out the oxidation utilization in the oxidation unit with sending into behind mash gas extraction and air or the coal mine wind-lack gas mixed diluting.In order to guarantee the coal mine methane gas oxidation device safe operation, in general the methane gas concentration that requires to get into the oxidation unit oxidation bed will be less than 1.5% well below the explosion limit of gas, local overrich phenomenon can not occur.The helical blade cyclone mixer is the critical component that guarantees mash gas extraction and air or coal mine wind-lack gas mixing uniformity in this oxidation unit; Can make methane concentration and be 0.3%～1.2% gaseous mixture, its performance quality influences stability, economy and the safety of methane conversion, device to a great extent.
Patent " oxidation unit Device in Gas blending gas handling system " (CN200920025062.2) in; The person in charge of gas blender and looped pipeline design more complicated; And get into the gas air inlet person in charge from very thin looped pipeline in 360 ° of scopes of the methane gas of high concentration, increased the danger that high concentration gas and wall friction are blasted.In patent " blender of colliery mash gas extraction and ventilation air gas " (CN 201010274136.3), the circular cone tail pipe that the complex structure of blender and its are uniformly distributed with the gas induction tunnel of aperture can bring very big flow resistance, increases the energy consumption that transports gas.In addition, also do not see the gas diluted mixture device that has structure and performance all fairly perfect at present.
The utility model content
The purpose of the utility model provides and a kind ofly can overcome above-mentioned defective; Remedy the deficiency of existing coal mine methane gas oxidation device supply technology; Provide a kind of mash gas extraction, ventilation air gas or even air are mixed, and be reduced to the spiral-flow type colliery mash gas extraction diluted mixture device of safe concentration.Its technical scheme is:
A kind of spiral-flow type colliery mash gas extraction diluted mixture device; The housing and the gas induction tunnel that comprise tubulose; The gas induction tunnel comprises inlet tube and is installed in the convergent divergent channel of the inlet tube port of export, and wherein inlet tube is that 90 ° of bend pipes, arrival ends are arranged on outside the housing, and inlet tube vertically penetrates in the housing, is horizontally set in the housing near the straight length of the port of export near the straight length of arrival end; Link to each other with convergent divergent channel and towards the port of export of housing; It is characterized in that: set up internal helical blades, external spiral blade, reinforcing rib and deflection cone, wherein deflection cone is a cone structure, is positioned at convergent divergent channel, the tip port of export of convergent divergent channel dorsad; Be fixedly connected through reinforcing rib between convergent divergent channel, housing and the deflection cone; Inlet tube is positioned at the axle center of housing near the axis of straight length, convergent divergent channel and the deflection cone of the port of export, and internal helical blades is installed in the straight length of inlet tube near the port of export, and the external spiral blade installation is in the toroidal cavity that inlet tube surrounds near the straight length and the inner walls of the port of export.
Described spiral-flow type colliery mash gas extraction diluted mixture device; The caliber of housing and inlet tube is constant; Convergent divergent channel adopts the gradually big reducer pipe of internal diameter, and the expansion angle of convergent divergent channel is between 30 ° to 90 °, and the port of export sectional area of convergent divergent channel is between the 50%-80% of housing sectional area.
Described spiral-flow type colliery mash gas extraction diluted mixture device, the axial distance between the elbow of inlet tube to the convergent divergent channel port of export is not less than 6 times of inlet tube caliber.Described spiral-flow type colliery mash gas extraction diluted mixture device is characterized in that: the axial distance between the port of export of convergent divergent channel and the housing port of export is not less than 2 times of housing caliber.
Described spiral-flow type colliery mash gas extraction diluted mixture device; It is characterized in that: internal helical blades is identical with the direction of rotation of external spiral blade; The inwall of the straight length of the internal helical blades and the inlet tube port of export is tangent, and the outer wall of the straight length of the external spiral blade and the inlet tube port of export and the inwall of housing are tangent.
Described spiral-flow type colliery mash gas extraction diluted mixture device is characterized in that: housing and upstream and downstream pipeline welding, inlet gas are air or ventilation air gas, inlet tube arrival end and upstream line welding, and inlet gas is a mash gas extraction.
The utility model compared with prior art, its advantage is:
1, inside and outside helical blade makes the inboard high concentration gas of convergent divergent channel outlet and the air or the coal mine methane gas in the outside that tangential swirl speed in the same way arranged; The centrifugal force that tangential rotation produces helps the high concentration gas of center is transported to periphery, air or the coal mine methane gas that makes the inboard mash gas extraction and the outside the very short time and apart from reach and mix.
2. this blender can be installed on the entrance pipe of air-introduced machine; Utilize pipeline negative pressure suction mash gas extraction; Convergent divergent channel makes pipe gas flow rate interior and that pipe is outer draw back gap simultaneously, and the mash gas extraction flow velocity in air outside the pipe or the coal mine methane gas flow rate ratio pipe is high, has ejector action to managing interior mash gas extraction; Reduce the conveying power consumption of mash gas extraction, reduced the cost of improvement on Ventilation System under the coal mine.
3, mash gas extraction is introduced from the pipeline center, and air or ventilation air gas are introduced from pipeline is peripheral, and near the gas density before mixing the wall is very low, has avoided the danger of high local concentrations methane gas and wall friction blast.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is that A embodiment illustrated in fig. 1 is to lateral view.
Fig. 3 is a B-B sectional view embodiment illustrated in fig. 1.
Among the figure: 1, housing 2, reinforcing rib 3, deflection cone 4, convergent divergent channel 5, inlet tube 6, external spiral blade 7, internal helical blades
The specific embodiment
In the embodiment shown in Fig. 1-3: the housing 1, gas induction tunnel, internal helical blades 7, external spiral blade 6, reinforcing rib 2 and the deflection cone 3 that comprise tubulose; The gas induction tunnel comprises inlet tube 5 and the convergent divergent channel 4 that is installed in inlet tube 5 ports of export; The caliber of its middle shell 1 and inlet tube 5 is constant; It is 60 ° that convergent divergent channel 4 adopts gradually big reducer pipe, the expansion angle of internal diameter; The port of export sectional area of convergent divergent channel 4 be housing 1 sectional area 65%, the axial distance between the port of export and housing 1 port of export is 3 times of housing 1 caliber, inlet tube 5 is 6 times that the axial distance between 90 ° of bend pipes, elbow to convergent divergent channel 4 ports of export is not less than inlet tube 5 calibers; The arrival end of inlet tube 5 is arranged on outside the housing 1, and inlet tube 5 vertically penetrates in the housing 1, is horizontally set in the housing 1 near the straight length of the port of export near the straight length of arrival end, links to each other with convergent divergent channel 4 and towards the port of export of housing 1; Deflection cone 3 is a cone structure; Be positioned at convergent divergent channel 4, the tip port of export of convergent divergent channel 4 dorsad; Be fixedly connected through reinforcing rib 2 between convergent divergent channel 4, housing 1 and the deflection cone 3; Inlet tube 5 is positioned at the axle center of housing 1 near the axis of straight length, convergent divergent channel 4 and the deflection cone 3 of the port of export, and internal helical blades 7 is installed in the straight length of inlet tube 5 near the port of export, and external spiral blade 6 is installed in the toroidal cavity that inlet tube 5 surrounds near the straight length and housing 1 inwall of the port of export.
Internal helical blades 7 is identical with the direction of rotation of external spiral blade 6, and internal helical blades 7 is tangent with the inwall of the straight length of inlet tube 5 ports of export, and the outer wall of the straight length of the external spiral blade 6 and inlet tube 5 ports of export and the inwall of housing 1 are tangent.
Claims (6)
1. spiral-flow type colliery mash gas extraction diluted mixture device; The housing (1) and the gas induction tunnel that comprise tubulose; The gas induction tunnel comprises inlet tube (5) and is installed in the convergent divergent channel (4) of inlet tube (5) port of export; Wherein inlet tube (5) is that 90 ° of bend pipes, arrival ends are arranged on outside the housing (1); Inlet tube (5) vertically penetrates in the housing (1), is horizontally set in the housing (1) near the straight length of the port of export near the straight length of arrival end, links to each other with convergent divergent channel (4) and towards the port of export of housing (1), it is characterized in that: set up internal helical blades (7), external spiral blade (6), reinforcing rib (2) and deflection cone (3); Wherein deflection cone (3) is a cone structure; Be positioned at convergent divergent channel (4), the tip port of export of convergent divergent channel (4) dorsad, be fixedly connected through reinforcing rib (2) between convergent divergent channel (4), housing (1) and the deflection cone (3), inlet tube (5) is positioned at the axle center of housing (1) near the axis of straight length, convergent divergent channel (4) and the deflection cone (3) of the port of export; Internal helical blades (7) is installed in the straight length of inlet tube (5) near the port of export, and external spiral blade (6) is installed in the toroidal cavity that inlet tube (5) surrounds near the straight length and housing (1) inwall of the port of export.
2. spiral-flow type as claimed in claim 1 colliery mash gas extraction diluted mixture device; It is characterized in that: the caliber of housing (1) and inlet tube (5) is constant; Convergent divergent channel (4) adopts the gradually big reducer pipe of internal diameter; The expansion angle of convergent divergent channel (4) is between 30 ° to 90 °, and the port of export sectional area of convergent divergent channel (4) is between the 50%-80% of housing (1) sectional area.
3. spiral-flow type as claimed in claim 1 colliery mash gas extraction diluted mixture device is characterized in that: the axial distance between elbow to convergent divergent channel (4) port of export of inlet tube (5) is not less than 6 times of inlet tube (5) caliber.
4. spiral-flow type as claimed in claim 1 colliery mash gas extraction diluted mixture device is characterized in that: the axial distance between the port of export of convergent divergent channel (4) and housing (1) port of export is not less than 2 times of housing (1) caliber.
5. spiral-flow type as claimed in claim 1 colliery mash gas extraction diluted mixture device; It is characterized in that: internal helical blades (7) is identical with the direction of rotation of external spiral blade (6); Internal helical blades (7) is tangent with the inwall of the straight length of inlet tube (5) port of export, and the outer wall of the straight length of the external spiral blade (6) and inlet tube (5) port of export and the inwall of housing (1) are tangent.
6. spiral-flow type as claimed in claim 1 colliery mash gas extraction diluted mixture device; It is characterized in that: housing (1) and upstream and downstream pipeline welding; Inlet gas is air or ventilation air gas, inlet tube (5) arrival end and upstream line welding, and inlet gas is a mash gas extraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203088618U CN202176360U (en) | 2011-08-23 | 2011-08-23 | Rotary flow type gas drainage dilution mixer for coal mines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203088618U CN202176360U (en) | 2011-08-23 | 2011-08-23 | Rotary flow type gas drainage dilution mixer for coal mines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176360U true CN202176360U (en) | 2012-03-28 |
Family
ID=45866245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203088618U Withdrawn - After Issue CN202176360U (en) | 2011-08-23 | 2011-08-23 | Rotary flow type gas drainage dilution mixer for coal mines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176360U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278135A (en) * | 2011-08-23 | 2011-12-14 | 山东理工大学 | Vortex type extracted gas dilution mixer for coal mine |
-
2011
- 2011-08-23 CN CN2011203088618U patent/CN202176360U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278135A (en) * | 2011-08-23 | 2011-12-14 | 山东理工大学 | Vortex type extracted gas dilution mixer for coal mine |
| CN102278135B (en) * | 2011-08-23 | 2013-06-19 | 山东理工大学 | Vortex type extracted gas dilution mixer for coal mine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120328 Effective date of abandoning: 20130619 |
|
| RGAV | Abandon patent right to avoid regrant |