CN217421263U - Enhanced ventilation air methane processing system - Google Patents

Abstract

The utility model relates to an enhancement mode ventilation air methane processing system, be equipped with the gas blender, the gas blender includes pipy casing, be equipped with air injection grid and gas mixing device along the axial in the casing, the air injection grid sets up in gas mixing device's front side, the gas mixing device is equipped with a plurality of water conservancy diversion fin, the water conservancy diversion fin is platelike, install respectively on the horizontal branch that corresponds separately, the extending direction of horizontal branch is perpendicular with the axial of casing, the quantity of horizontal branch is a plurality of, set up to two-layer, vertical dislocation set is followed to two-layer horizontal branch, water conservancy diversion fin slope sets up, be on a parallel with the extending direction of horizontal branch and be an acute angle with the axial of casing, the slope opposite direction of installing the adjacent water conservancy diversion fin on same horizontal branch. The utility model discloses a gas mixer can make ventilation air methane and the abundant homogeneous mixing of air, reduces gas concentration, and the gaseous medium after mixing can be handled by safe sending into the epilogue exhaust treatment device and recycle.

Description

Enhanced ventilation air methane processing system

Technical Field

The utility model relates to a processing system of the gas that contains low concentration gas especially relates to an enhancement mode ventilation air methane processing system.

Background

In the coal mining process, low-concentration gas is generally mixed in the underground air draft, when the gas concentration reaches 5% -16%, the gas can explode when meeting open fire, potential safety hazards exist, and the gas is the root of coal mine gas explosion accidents.

The air exhaust gas (ventilation air methane) is generally directly exhausted into the atmosphere, and along with the increase of the coal yield and the mining depth in China, the gas exhaust amount and the air exhaust gas amount of a coal mine are increased year by year, so that accidents are easily caused, meanwhile, the atmospheric environment is also seriously polluted, and the greenhouse effect is caused.

SUMMERY OF THE UTILITY MODEL

For overcoming the above defect of the prior art, the utility model provides an enhancement mode ventilation air methane processing system can make ventilation air methane and air homogeneous mixing, effectively reduces gas concentration, reduces the potential safety hazard.

The utility model discloses realize above-mentioned purpose's technical scheme is: an enhanced ventilation air methane processing system comprises a ventilation air methane extraction pump, a gas mixer and a waste gas processing device, wherein the ventilation air methane extraction pump, the gas mixer and the waste gas processing device are arranged on the ground, an air inlet pipe of the ventilation air methane extraction pump extends to an underground gas extraction area, an air inlet of the gas mixer is connected with a ventilation air outlet of the ventilation air methane extraction pump, an air outlet of the gas mixer is connected with an air inlet of the waste gas processing device, the gas mixer comprises a tubular shell, an air injection grid and a gas mixing device are arranged in the shell along the axial direction, the air injection grid is arranged on the front side (air inlet direction side) of the gas mixing device and is provided with a plurality of nozzles facing the gas mixing device, the gas mixing device is provided with a plurality of flow guide fins, and the flow guide fins are plate-shaped, are respectively arranged on the corresponding transverse supporting rods, the extending direction of the transverse supporting rods is vertical to the axial direction of the shell, the number of the transverse supporting rods is a plurality of, the transverse supporting rods are arranged into two layers, the transverse supporting rods in the same layer are parallel to each other and have equal intervals, the transverse supporting rods in the two layers are parallel, the transverse supporting rods in the two layers are arranged along the longitudinal direction (the direction vertical to the transverse direction in the plane where each layer of transverse supporting rods is positioned) in a staggered way, the water conservancy diversion fin slope sets up (for the axial tilt of casing, the contained angle that has a slope to produce between the two), be on a parallel with the extending direction of horizontal branch and with the axial of casing is an acute angle, installs the opposite direction of slope of the adjacent water conservancy diversion fin on same horizontal branch, is located the water conservancy diversion fin mirror symmetry setting on the horizontal branch of the symmetry axis both sides parallel with horizontal branch in the front layer, and the water conservancy diversion fin in the rear layer sets up with the water conservancy diversion fin in the front layer on vertical dislocation.

According to the cross section size of the shell and the number and the interval arrangement condition of each layer of transverse struts, the guide fins in the rear layer and the guide fins in the front layer can be completely staggered in the longitudinal direction, namely the guide fins in the rear layer completely block all gaps between the guide fins in the front layer in the longitudinal direction in the axial direction of the shell; the guide vanes in the rear layer and the guide vanes in the front layer may also be partially arranged in a staggered manner in the longitudinal direction, that is, the guide vanes in the rear layer block part of the longitudinal gap between the guide vanes in the front layer in the axial direction of the housing, and a smaller gap still exists between the guide vanes in the front layer in the longitudinal direction.

Preferably, the guide fin is rectangular, and two side edges of the guide fin are perpendicular to the extending direction of the transverse support rod.

Preferably, the guide vanes extend obliquely rearward, with their front side edges fixed (e.g. welded) to the respective transverse struts.

Preferably, the guide vanes are densely distributed on the transverse strut, that is, adjacent guide vanes mounted on the same transverse strut are close to each other in the transverse direction (close together) or have a gap (small gap), and when the gap is left, the gap between adjacent guide vanes is not greater than 1/4, which is the transverse dimension of the guide vanes.

Preferably, the guide vanes on each transverse strut are distributed in a uniform manner in the transverse direction.

Preferably, the longitudinal (direction perpendicular to the transverse direction in the plane of each transverse strut) spacing between the opposite ends of the guide vanes on opposite sides (sides facing the other transverse strut) on two adjacent transverse struts is no greater than 1/4 of the transverse dimension of the guide vanes.

Preferably, the transverse strut is angle steel.

Preferably, the angle steel is equilateral angle steel with equal thickness, and the angle steel faces to the right front or the coming direction of ventilation air in actual use.

Preferably, the front side edge of the guide vane is positioned on the inner side surface of the angle iron. The front parts of the guide fins can be attached to the corresponding inner side surfaces of the angle steel, so that the included angle between the guide fins and the axial direction of the shell is 45 degrees, and the included angle between two adjacent guide fins (the planes where the guide fins are located) which are reversely inclined on the same transverse supporting rod is 90 degrees.

The front part of the guide wing piece can be inserted to the bottom along the inner surface of the corresponding side of the angle steel, so that the end surface of the front side edge of the guide wing piece is abutted against the inner surface of the other side edge of the angle steel, the positioning of the guide wing piece is realized, and the guide wing piece can be welded on the angle steel.

Preferably, the front side of the transverse strut in the same layer is provided with a longitudinal support beam, and the number of the support beams is one or more.

Preferably, the middle part of the shell is an equal-diameter circular pipe, and two ends of the shell are conical pipes.

Preferably, the gas mixer is provided with a thermometer and a gas concentration detection device (e.g., a gas concentration sensor) which are located behind the gas mixing device.

The exhaust gas treatment device may be a regenerative high-temperature oxidation device.

The utility model has the advantages that:

1) the methane gas mixer can fully and uniformly mix ventilation air (air exhaust gas) and air in a short distance or an ultra-short distance (less than 4 meters), so that the concentration of the methane in the medium is always kept below the explosion concentration of the methane (below 5 percent or even lower, such as below 3 percent), the mixed gas medium cannot explode even if dangerous factors such as open fire exist, the safety of the system is ensured, and the mixed gas medium can be safely sent to a subsequent waste gas treatment device for treatment and reutilization, so that the methane gas mixer is particularly suitable for occasions with compact system structure requirements and short ventilation air transmission distance (the distance between a ventilation air extraction pump/pump room and the waste gas treatment device);

2) when the ventilation air and the air are mixed in the gas mixer, the air is sprayed into the shell from the air spraying grid and continues to flow linearly along the original spraying angle, the ventilation air flows through the shell from front to back along the axial direction, the air is primarily mixed with the ventilation air, when the air and the ventilation air pass through the front layer flow guide fins of the gas mixing device, the air and the ventilation air are further intensively mixed, the air and the ventilation air are divided into a plurality of small air flows by the front layer flow guide fins, the small air flows pass through the gaps between the front layer flow guide fins and flow along the surfaces of the front layer flow guide fins and are turned to generate a plurality of small eddy currents, the directions of the eddy currents formed by two adjacent flow guide fins are opposite, meanwhile, the flow velocity also generates violent fluctuation along with the change of the flow area, the small air flows mutually interpenetrate and collide in the axial direction and the radial direction and then pass through the rear layer flow guide fins of the gas mixing device, and performing intensive mixing again, wherein each small airflow is divided into a plurality of smaller airflows (generating smaller vortexes) by the rear-side layer flow guide fin again to turn and mutually penetrate and collide in the axial direction and the radial direction, and the small airflows and the smaller airflows are continuously shunted, convoluted and converged again, so that the ventilation air and the air are fully and uniformly mixed in a short distance or an ultra-short distance, and the gas concentration in the air is reduced.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view showing the construction of the gas mixer of FIG. 1;

FIG. 3 is a schematic sectional view A-A of FIG. 2;

FIG. 4 is a right side view of the guide vanes on the anterior lateral strut in FIG. 2;

FIG. 5 is a right side view of the guide vanes on the posterior lateral strut of FIG. 2;

FIG. 6 is a schematic cross-sectional view B-B of FIG. 4;

fig. 7 is a partially enlarged view of a portion I in fig. 6, showing an attachment structure between the guide vane, the angle iron, and the support beam.

Detailed Description

All directional indicators (such as front, back, horizontal, vertical, longitudinal, etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the drawings), and do not constitute the limitation of the actual using direction, and if the specific posture is changed, the directional indicator is changed accordingly.

Referring to fig. 1-7, the utility model discloses an enhancement mode ventilation air methane processing system, take out pump (or take out pump house) 14, gas blender 1 and exhaust treatment device 15 including the ventilation air methane, the ventilation air methane takes out the pump gas blender with exhaust treatment device all locates subaerially, the intake pipe that the pump was taken out in the ventilation air methane extends to underground gas and takes out the district, gas blender's (front end) air inlet is connected the ventilation air methane of pump is taken out in the ventilation air methane exports, can be equipped with the valve on the connecting tube, gas blender's (rear end) gas outlet is connected exhaust treatment device's air inlet, exhaust treatment device can adopt heat accumulation formula high temperature oxidation device (for example high temperature oxidation ware), utilizes low concentration gas medium to carry out oxidation power generation. The gas mixer comprises a tubular shell 2, an air injection grid 3 and a gas mixing device 4 are arranged in the shell along the axial direction, the air injection grid is arranged on the front side (air inlet direction side) of the gas mixing device and is provided with a plurality of nozzles 5 facing the gas mixing device, the gas mixing device is provided with a plurality of guide vanes 6, the guide vanes are plate-shaped and are fixedly mounted on corresponding transverse supporting rods 7, the extending direction of the transverse supporting rods is vertical to the axial direction of the shell, the number of the transverse supporting rods is a plurality of and is arranged into two layers, the transverse supporting rods in the same layer are parallel to each other and have equal intervals, the two layers of transverse supporting rods are parallel, the two layers of transverse supporting rods are staggered and arranged along the longitudinal direction (the plane where each layer of transverse supporting rods is located and the transverse vertical direction), and generally, the rear layer (or called as second) between two adjacent transverse supporting rods of the front layer (or called as first layer) is arranged on the longitudinal direction Layer) transverse strut with longitudinal spacing between two adjacent transverse struts on the front side layer is the same, water conservancy diversion fin slope sets up (for the axial tilt of casing, there is the contained angle that a slope produced between the two), is on a parallel with transverse strut's extending direction and with the axial of casing is an acute angle, installs adjacent water conservancy diversion fin staggered arrangement on same transverse strut, and the incline direction is opposite, each transverse strut of any layer be located with the axis vertically coplanar of casing, the water conservancy diversion fin mirror symmetry setting on the transverse strut of the symmetry axis both sides parallel with transverse strut in the front side layer, water conservancy diversion fin in the rear side layer and the water conservancy diversion fin in the front side layer are along vertical dislocation set.

According to the cross section size of the shell and the number and the interval arrangement condition of each layer of transverse struts, the guide fins in the rear layer and the guide fins in the front layer can be completely staggered in the longitudinal direction, namely the guide fins in the rear layer completely block all gaps between the guide fins in the front layer in the longitudinal direction in the axial direction of the shell; the guide vanes in the rear layer and the guide vanes in the front layer may also be partially arranged in a staggered manner in the longitudinal direction, that is, the guide vanes in the rear layer block part of the longitudinal gap between the guide vanes in the front layer in the axial direction of the housing, and a smaller gap still exists between the guide vanes in the front layer in the longitudinal direction.

When the number of the transverse supporting rods of the front side layer is odd, one transverse supporting rod is positioned on a symmetrical shaft parallel to the transverse supporting rods of the plane where the transverse supporting rods of the front side layer are positioned, the other transverse supporting rods are uniformly distributed on two sides of the symmetrical shaft, and the flow guide fins on the transverse supporting rods on the two sides of the symmetrical shaft are arranged in a mirror symmetry mode by taking the symmetrical shaft as a symmetrical axis; when the number of the transverse supporting rods of the front side layer is even, the transverse supporting rods are uniformly distributed on two sides of a symmetry axis parallel to the transverse supporting rods on the plane where the transverse supporting rods of the front side layer are located, and the guide wing pieces on the transverse supporting rods on the two sides of the symmetry axis are arranged in a mirror symmetry mode by taking the symmetry axis as the symmetry axis.

Typically, the number of transverse struts of the anterior layer is an odd number, the number of transverse struts of the posterior layer is an even number, and the number of transverse struts of the posterior layer is one less than the number of transverse struts of the anterior layer, e.g., the number of transverse struts of the anterior layer is 5 and the number of transverse struts of the posterior layer is 4.

The guide fin is preferably rectangular, rectangular steel plates with the same specification can be adopted, and the edges of two sides of the guide fin are perpendicular to the extending direction of the transverse supporting rod.

The guide vanes preferably extend obliquely rearward, with their front side edges fixed (e.g. welded) to the respective transverse struts. The included angle α between the guide fin and the plane of each transverse strut is preferably 45 °, and other included angles may be adopted according to actual needs, for example, 30 ° or 60 °, and the included angle between the guide fin and the plane of each transverse strut is usually selected (inclusive) within the range of 30 ° to 60 ° in consideration of the influence on the airflow disturbance effect and resistance.

The guide vanes are preferably densely distributed on the transverse strut, i.e. adjacent guide vanes mounted on the same transverse strut are laterally close together or have gaps (small gaps), and when gaps are left, the gaps between adjacent guide vanes are not larger than 1/4 of the transverse dimension of the guide vanes, and generally, the gaps can be limited to the assembly gaps required for assembly.

The transverse distribution mode of the guide vanes on each transverse strut is preferably consistent. The opposite ends (opposite or staggered and opposite) of the guide fins on the opposite sides (facing to the other transverse strut) on the two adjacent transverse struts in any layer of transverse struts can be longitudinally spaced, or can not be spaced (in consideration of convenience in assembly and machining precision, at least a tiny assembly gap can be usually reserved), when the spacing is reserved, the spacing is not larger than 1/4 of the transverse dimension of the guide fins, and the size of the spacing can be determined by comprehensively considering the disturbance effect and the resistance influence on the airflow.

The guide vanes on any one layer of transverse struts may be longitudinally aligned or misaligned or partially aligned or partially misaligned. When the guide fins on different transverse supporting rods are aligned in the longitudinal direction, a plurality of rows of guide fins are formed, two opposite guide fin pairs (two guide fins with opposite rear side edges arranged on the same transverse position on the adjacent transverse supporting rods) are arranged between the adjacent transverse supporting rods on the same row, or no guide fin gaps are formed, and the guide fin pairs and the no guide fin gaps are distributed in a staggered mode.

The transverse strut can be angle steel, the angle steel is preferably equilateral angle steel with equal thickness, and the angle steel faces to the right front (the direction of the air inlet of the gas mixer) or the direction of the ventilation air in actual use.

The front side edge of each guide wing piece is preferably located on the inner side face of the angle steel, the front part of each guide wing piece can be attached to the corresponding inner side face of the angle steel, therefore, the guide wing pieces and the axial included angle of the shell is 45 degrees, the included angle beta between two adjacent guide wing pieces (planes where the guide wing pieces are located) which are inclined reversely on the same transverse supporting rod is 90 degrees, the guide wing pieces are in central (rotational) symmetry, the front parts of the guide wing pieces can be inserted to the bottom along the inner surfaces of the corresponding sides of the angle steel, the end faces of the front side edges of the guide wing pieces are abutted against the inner surface of the other side edge of the angle steel, and therefore the positioning of the guide wing pieces is achieved, and the guide wing pieces can be welded on the angle steel.

Every two adjacent guide vanes which are inclined reversely on the same transverse supporting rod form a group, which can be called as a guide vane group, each guide vane group on the front side layer transverse supporting rod can respectively correspond to one nozzle of the air jet grid, and the nozzle is positioned right ahead of the symmetric center of two guide vanes in the same guide vane group, so as to obtain better air flow disturbance effect.

The plurality of guide fins arranged on the same angle steel can be regarded as one row, the guide fins in the same row are fixed on the angle steel in a welding mode, and two ends of the angle steel are welded with the inner wall of the shell.

The front side of the transverse struts of the same layer is preferably provided with longitudinal support beams 8 arranged perpendicularly to the transverse struts of the layer for additional fixing or support of the transverse struts of the layer. The number of the supporting beams of the same layer of transverse supporting rods can be one or more according to actual needs, and when the number of the supporting beams of the same layer of transverse supporting rods is multiple, the supporting beams are parallel to each other and have equal intervals.

The supporting beam can adopt a channel steel, and two ends of the channel steel are welded with the inner wall of the shell.

Can set up the microgroove 9 that corresponds with the angle of angle steel along supporting beam's last edge (for example, when adopting the backward channel-section steel of notch as a supporting beam, the top edge of the both sides board of channel-section steel), insert the angle of angle steel in corresponding microgroove, realize the stability of angle steel to make things convenient for the operation.

The air injection grid can be composed of a plurality of air injection pipes, the air injection pipes are provided with nozzles, the nozzles can adopt any suitable form, for example, the simplest form is that through holes are arranged on the pipe walls of the air injection pipes, the air injection pipes are positioned in the shell, the air delivery branch pipes outside the shell are connected and positioned through connecting pipe fittings penetrating through the shell, the other ends of the air delivery branch pipes are connected with an air delivery main pipe 10, and the air delivery main pipe is connected with a fan 11. The air injection pipe and the corresponding air delivery branch pipe can also adopt a pipe, the pipe wall of the part positioned in the shell is provided with a nozzle, and the pipe wall of the part positioned outside the shell is not provided with a nozzle.

The air supply manifolds may be provided with respective regulating valves 12, which may be manual, electric or pneumatic. The governing valve can adopt the butterfly valve that is equipped with the calibrated scale to convenient demonstration and air flow rate of regulation, the governing valve also can adopt the valve of other suitable forms, can adjust and balance the air flow in each air transportation branch pipe through the governing valve on each air transportation branch pipe, eliminate because of resistance difference or on each branch pipe (branch road) the unbalanced flow that leads to of the intake air velocity in the casing is uneven or with the unmatched phenomenon of intake air flow, realize better mixed effect.

The air delivery manifold is preferably provided with an expansion joint 13, which may be a metal expansion joint, to absorb thermal displacement caused by expansion of the housing or changes in the axial dimension of the air delivery manifold due to other causes (e.g., gas flow).

The middle part of the shell is preferably an equal-diameter round pipe, and the two ends of the shell are preferably taper pipes, so that the shell is conveniently connected with front-end equipment or pipelines and rear-end equipment or pipelines.

The gas mixer is preferably provided with a thermometer and a gas concentration detecting means (e.g., a gas concentration sensor) at the rear of the gas mixing means for observing and monitoring the temperature and gas concentration of the gas medium after the ventilation air is mixed with the air, so as to adjust the amount of air sprayed from the air spray grill according to the detection result.

In practical application, the gas mixer is preferably arranged at one side close to the ventilation air methane extraction pump or the extraction pump room, namely a pipeline connecting the gas inlet of the gas mixer and the ventilation air methane outlet of the ventilation air methane extraction pump or the extraction pump room is as short as possible, so that the gas concentration can be diluted as early as possible in the ventilation air methane conveying process, and the safety of the system is ensured.

The utility model has the characteristics of simple structure, simple to operate, occupation space are little, do not need extra kinetic energy can realize that ventilation air methane and the abundant homogeneous mixing of air and security height etc, are particularly useful for the system architecture and require compactly, and ventilation air methane transmission distance (the ventilation air methane is taken out and is adopted the distance between pump house and the exhaust-gas treatment device) shorter occasion is used.

The preferred and optional technical means disclosed in the present invention can be combined arbitrarily to form a plurality of different technical solutions, except for the specific description and the further limitation that one preferred or optional technical means is another technical means.

Claims (10)

1. The enhanced ventilation air methane processing system is characterized by comprising a ventilation air methane extracting pump, a gas mixer and a waste gas processing device, wherein the ventilation air methane extracting pump, the gas mixer and the waste gas processing device are all arranged on the ground, an air inlet pipe of the ventilation air methane extracting pump extends to an underground gas extraction area, an air inlet of the gas mixer is connected with a ventilation air outlet of the ventilation air methane extracting pump, an air outlet of the gas mixer is connected with an air inlet of the waste gas processing device, the gas mixer comprises a tubular shell, an air injection grid and a gas mixing device are arranged in the shell along the axial direction, the air injection grid is arranged on the front side of the gas mixing device and is provided with a plurality of nozzles facing the gas mixing device, the gas mixing device is provided with a plurality of flow guide fins, and the flow guide fins are plate-shaped, install respectively on the horizontal branch that corresponds separately, the extending direction of horizontal branch with the axial vertical of casing, the quantity of horizontal branch is a plurality of, sets up to two-layer, and each horizontal branch parallel to each other and the interval in the same layer equals, and two-layer horizontal branch is parallel, and two-layer horizontal branch is along vertical dislocation set, water conservancy diversion fin slope sets up, is on a parallel with the extending direction of horizontal branch and with the axial of casing is an acute angle, installs the opposite direction of slope of adjacent water conservancy diversion fin on same horizontal branch, is located the water conservancy diversion fin mirror symmetry setting on the horizontal branch with the parallel symmetry axis both sides of horizontal branch in the front layer, and the water conservancy diversion fin in the rear layer and the water conservancy diversion fin in the front layer are along vertical dislocation set.

2. The enhanced ventilation air methane processing system of claim 1 wherein said guide vanes are rectangular with two side edges perpendicular to the direction of extension of said transverse struts.

3. The enhanced ventilation air methane treatment system of claim 1 wherein said deflector vanes extend diagonally rearward with leading edges thereof secured to respective ones of said transverse struts.

4. The enhanced ventilation air methane treatment system of claim 1 wherein adjacent guide vanes mounted on the same transverse strut are laterally abutted or gapped.

5. The enhanced ventilation air methane processing system of claim 1 wherein the guide vanes on each of said transverse struts are disposed in a uniform transverse pattern.

6. The enhanced ventilation air methane processing system of claim 1 wherein said guide vanes are angled at 45 ° to the axial direction of said shell and wherein the angle between two adjacent guide vanes that are oppositely inclined on the same transverse strut is 90 °.

7. The enhanced ventilation air methane treatment system of claim 1 wherein said transverse strut is an angle steel.

8. The enhanced ventilation air methane treatment system according to claim 7, wherein the angle is an equilateral constant thickness angle, the angle faces straight ahead, and the leading edge of the deflector vane is located on the inner side of the angle.

9. An enhanced ventilation air methane treatment system according to claim 1, wherein the front side of the transverse struts in the same layer is provided with one or more longitudinal support beams.

10. The enhanced ventilation air methane processing system according to claim 1, wherein the shell has a substantially cylindrical shape with a constant diameter at a central portion and tapered portions at opposite ends.

Images