Device for blending coal mine gas by using static mixer

Abstract

The utility model provides a device for mixing coal mine gas by utilizing a static mixer, which relates to the technical field of gas auxiliary mixing and comprises a static mixing pipe body, flanges are fixed on two end faces of the static mixing pipe body, round angle discs are fixed between the static mixing pipe body and the flanges, and a mixing cylinder is fixed inside the static mixing pipe body. An air outlet pipe is fixed on one side wall of the static mixing pipe body, an air inlet is formed between the static mixing pipe body and the mixing barrel, rotating sticks are fixed on the side end face of the air inlet and the top of the fillet disc, the top rotating stick is rotationally connected with a forward-rotating spiral blade, the bottom rotating stick is rotationally connected with a reverse-rotating spiral blade, and the forward-rotating spiral blade and the reverse-rotating spiral blade are oppositely arranged; by means of the flow guiding effect of the spiral blades, gas rotates while flowing, then air flow is scattered between the mixing barrel and the static mixing pipe body disorderly, flows upwards and is further mixed when reaching the air outlet pipe, and therefore the uniformity of the mixed gas is improved, and the mixed gas with the stable concentration is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of gas auxiliary mixing, in particular to a device for mixing coal mine gas by using a static mixer. Background Art

[0002] The mixing process of the static mixer is carried out by a series of mixing units of different specifications installed in a hollow pipe. Due to the action of the mixing units, the fluid sometimes rotates to the left and sometimes rotates to the right, constantly changing the direction of the flow mixer, which can not only push the central fluid to the periphery, but also push the peripheral fluid to the center, thus creating a good radial mixing effect.

[0003] In the existing technology, my country generally adopts two methods for gas extraction. The first is ground drilling extraction, and the second is underground coal mine gas extraction. The gas extracted from ground drilling has a high concentration and can be used directly, but the gas concentrations extracted from different drillings are different. Mixing them together can easily cause concentration fluctuations, which has a certain impact on utilization. The gas concentrations extracted from underground coal mine gas vary greatly. The high concentration can be used directly, while the low concentration cannot be used directly, which reduces the utilization rate of coalbed gas and affects the use effect. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a device for mixing coal mine gas by using a static mixer.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for mixing coal mine gas by using a static mixer, comprising a static mixing tube body, flanges are fixed on both end faces of the static mixing tube body, a rounded disc is fixed between the static mixing tube body and the flange, a mixing cylinder is fixed inside the static mixing tube body, an air outlet pipe is fixed on one side wall of the static mixing tube body, an air inlet is opened between the static mixing tube body and the mixing cylinder, a rotating stick is fixed on the side end face of the air inlet and the top of the rounded disc, the rotating stick on the top is rotatably connected with a forward-rotating spiral blade, and the rotating stick on the bottom is rotatably connected with a reverse-rotating spiral blade, the forward-rotating spiral blade and the reverse-rotating spiral blade are arranged opposite to each other, in the prior art, There are generally two ways to extract gas in my country: the first is ground drilling extraction, and the second is underground coal mine gas extraction. The gas extracted by ground drilling has a high concentration and can be used directly, but the gas concentrations extracted by different drillings are different. Mixing them together can easily cause concentration fluctuations, which has a certain impact on utilization. The gas concentrations extracted from underground coal mine gas extraction vary greatly. The high concentration can be used directly, while the low concentration cannot be used directly, which reduces the utilization rate of coal seam gas and affects the use effect. To address this problem, the utility model adopts a static mixing tube. A mixing cylinder is fixed inside the body, so that when the gas enters the mixing cylinder from the air inlet, it blows the positive-rotating spiral blades and the counter-rotating spiral blades to rotate around the rotating rod. At this time, the mixed gas passes through the guiding effect of the positive-rotating spiral blades, causing the gas to rotate while flowing downward, and then passes through the guiding effect of the counter-rotating spiral blades to produce a rotational motion in the opposite direction, thereby causing the airflow to be disorderly dispersed between the mixing cylinder and the static mixing tube body, and flow upward. When it reaches the outlet pipe, it will be further mixed, thereby improving the uniformity of the mixed gas and achieving a mixed gas with a stable concentration.

[0006] Preferably, a detection port is opened on the other side wall of the static mixing tube body, a detection tube is fixed on the inner wall of the detection port, and a gas detection sensor is electrically connected to the top of the detection tube. In the prior art, when gas of different concentrations enters the interior of the mixing cylinder, it can then flow out through the outlet pipe. However, before flowing out, it is necessary to ensure that the mixed gas is not doped with other substances to avoid potential risks. To address such problems, the utility model adopts a gas detection sensor electrically connected to the detection tube, so that when the mixed gas contacts the sensitive material on the surface of the sensor, it will cause changes in the properties of the material, thereby changing the electrical signal output of the gas detection sensor, and then monitoring the gas concentration in the mixing cylinder in real time. Thereby achieving the effect of detecting the mixing effect of the gas.

[0007] Preferably, the forward-rotating spiral blade and the reverse-rotating spiral blade are both composed of a plurality of split spiral blades of different shapes, and the two end surfaces of the split spiral blade are respectively provided with arc surfaces, and the arc sizes of the plurality of arc surfaces are inconsistent. In the prior art, when the mixed gas enters the mixing tube, it needs to pass through the guiding effect of the spiral blades to drive the gas to rotate while flowing downward. At this time, the split spiral blades need to rotate to produce a guiding effect. However, if the arc surfaces of the two end surfaces of the split spiral blades are of the same shape and size, this will cause the wind directions generated by the split spiral blades during the rotation process to be consistent, which will cause the gas of different concentrations to be mixed unevenly, thereby resulting in a situation where the utilization rate is reduced. To address this problem, the utility model adopts spiral blades composed of split spiral blades of different shapes, and the arc surfaces of the split spiral blades are of inconsistent sizes, so that when the mixed gas enters the mixing tube, it drives the split spiral blades to rotate, so that during the rotation of the split spiral blades, the guiding effect generated by the arc end surfaces of different sizes can drive gases of different degrees to achieve a mixing effect.

[0008] Preferably, the flange is provided with a plurality of annularly distributed fastening screw grooves, and the inner walls of the plurality of fastening screw grooves are fixed with fastening bolts, thereby achieving the effect of fastening the flange.

[0009] Preferably, a plurality of protective rings are fixed on the outer surfaces of the flanges, and protective materials are fixed inside the protective rings to prevent the bottom of the static mixing tube from being worn during use.

[0010] Preferably, the detection tube is arranged in parallel with the gas outlet pipe to facilitate better detection of the mixed gas.

[0011] Preferably, the shapes of the multiple split spiral leaves adopt an axisymmetric structure, which strengthens the rotation effect of the split spiral leaves and achieves a stable effect of the split spiral leaves without causing shape changes due to flipping.

[0012] Beneficial Effects

[0013] 1. In the prior art, my country generally adopts two methods for gas extraction. The first is ground drilling extraction, and the second is underground coal mine gas extraction. The gas extracted by ground drilling has a high concentration and can be used directly, but the gas concentrations extracted by different drillings are different. Mixing them together can easily cause concentration fluctuations, which has a certain impact on utilization. The gas concentrations extracted by underground coal mine gas extraction vary greatly. The gas with high concentration can be used directly, while the gas with low concentration cannot be used directly, which reduces the utilization rate of coal seam gas and affects the use effect. In view of such problems, the utility model adopts a static mixing tube. A mixing cylinder is fixed inside the body, so that when the gas enters the mixing cylinder from the air inlet, it blows the positive-rotating spiral blades and the counter-rotating spiral blades to rotate around the rotating rod. At this time, the mixed gas passes through the guiding effect of the positive-rotating spiral blades, causing the gas to rotate while flowing downward, and then passes through the guiding effect of the counter-rotating spiral blades to produce a rotational motion in the opposite direction, thereby causing the airflow to be disorderly dispersed between the mixing cylinder and the static mixing tube body, and flow upward. When it reaches the outlet pipe, it will be further mixed, thereby improving the uniformity of the mixed gas and achieving a mixed gas with a stable concentration.

[0014] 2. In the prior art, when gas of different concentrations enters the interior of the mixing cylinder, it can then flow out through the outlet pipe. However, before it flows out, it is necessary to ensure that the mixed gas is not doped with other substances, so as to avoid the occurrence of potential risks. To address this problem, the utility model uses a gas detection sensor electrically connected to the detection tube, so that when the mixed gas contacts the sensitive material on the surface of the sensor, it will cause changes in the properties of the material, thereby changing the electrical signal output of the gas detection sensor, and then monitoring the gas concentration in the mixing cylinder in real time. Thereby achieving the effect of detecting the mixing effect of the gas.

[0015] 3. In the prior art, when the mixed gas enters the mixing tube, it needs to pass through the guiding effect of the spiral blades to drive the gas to rotate while flowing downward. At this time, the split spiral blades need to be rotated to produce a guiding effect. However, if the arc surfaces at both end faces of the split spiral blades are of the same shape and size, this will cause the wind direction generated by the split spiral blades to be consistent during the rotation process, which will cause the gas of different concentrations to be mixed unevenly, thereby causing a decrease in utilization rate. To address this problem, the utility model adopts a spiral blade composed of split spiral blades of different shapes, and the arc surfaces of the split spiral blades are of different sizes, so that when the mixed gas enters the mixing tube, it drives the split spiral blades to rotate, so that during the rotation of the split spiral blades, the guiding effect generated by the arc end faces of different sizes can drive gases of different degrees to achieve a mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the static mixing tube body of the utility model;

[0017] Figure 2 It is a cross-sectional three-dimensional structural schematic diagram of the utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the spiral blade of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.

[0020] Legend:

[0021] 1. Static mixing tube body; 2. Flange; 3. Rounded disc; 4. Mixing cylinder; 5. Exhaust pipe; 6. Inlet; 7. Rotating stick; 8. Forward-rotating spiral blade; 9. Reverse-rotating spiral blade; 10. Detection port; 11. Detection tube; 12. Gas detection sensor; 13. Split spiral blade; 14. Arc surface; 15. Fastening bolt; 16. Protective ring. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0023] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment:

[0025] Reference Figure 1-4A device for mixing coal mine gas using a static mixer comprises a static mixing tube body 1, flanges 2 are fixed on both end surfaces of the static mixing tube body 1, a rounded disc 3 is fixed between the static mixing tube body 1 and the flange 2, a mixing barrel 4 is fixed inside the static mixing tube body 1, an air outlet pipe 5 is fixed on one side wall of the static mixing tube body 1, an air inlet 6 is opened between the static mixing tube body 1 and the mixing barrel 4, a rotating rod 7 is fixed on the side end surface of the air inlet 6 and the top of the rounded disc 3, the top rotating rod 7 is rotatably connected with a forward-rotating spiral blade 8, the bottom rotating rod 7 is rotatably connected with a reverse-rotating spiral blade 9, the forward-rotating spiral blade 8 and the reverse-rotating spiral blade 9 are arranged opposite to each other, and a detection port is opened on the other side wall of the static mixing tube body 1 10, a detection tube 11 is fixed to the inner wall of the detection port 10, and a gas detection sensor 12 is electrically connected to the top of the detection tube 11. The positive spiral leaf 8 and the reverse spiral leaf 9 are composed of a plurality of split spiral leaves 13 of different shapes. The two end surfaces of the split spiral leaf 13 are respectively provided with arc surfaces 14, and the arc sizes of the plurality of arc surfaces 14 are inconsistent. A plurality of annularly distributed fastening screw grooves are opened on the flange 2, and fastening bolts 15 are fixed to the inner walls of the plurality of fastening screw grooves. A plurality of protective rings 16 are fixed to the outer surfaces of the flanges 2, and protective materials are fixed inside the protective rings 16. The detection tube 11 is arranged in parallel with the gas outlet pipe 5, and the shape of the plurality of split spiral leaves 13 adopts an axisymmetric structure. In the prior art, There are generally two ways to extract gas in my country. The first is ground drilling extraction, and the second is underground coal mine gas extraction. The gas extracted by ground drilling has a high concentration and can be used directly, but the gas concentrations extracted by different drillings are different. Mixing them together can easily cause concentration fluctuations, which has a certain impact on utilization. The gas concentrations extracted by underground coal mine gas extraction vary greatly. The high concentration can be used directly, while the low concentration cannot be used directly, which reduces the utilization rate of coal seam gas and affects the use effect. To address this problem, the utility model adopts a method of fixing the static mixing tube 1 inside the static mixing tube 1. There is a mixing cylinder 4, which enables the gas to enter the mixing cylinder 4 from the air inlet 6, and at the same time blow the positive-rotating spiral blades 8 and the reverse-rotating spiral blades 9 to rotate around the rotating rod 7. At this time, the mixed gas passes through the guiding action of the positive-rotating spiral blades 8, causing the gas to rotate while flowing downward, and then passes through the guiding action of the reverse-rotating spiral blades 9 to produce a rotational motion in the opposite direction, thereby causing the airflow to be disorderly dispersed between the mixing cylinder 4 and the static mixing tube body 1, and flow upward, and will be further mixed when reaching the outlet pipe 5, thereby improving the uniformity of the mixed gas and achieving a mixed gas with a stable concentration.

[0026] The working principle of the utility model is as follows: a mixing cylinder 4 is fixed inside a static mixing tube body 1, so that when the gas enters the mixing cylinder 4 from the air inlet 6, the positive spiral blades 8 and the reverse spiral blades 9 are blown to rotate around the rotating rod 7. At this time, the mixed gas passes through the guiding effect of the positive spiral blades 8, so that the gas rotates while flowing downward, and again passes through the guiding effect of the reverse spiral blades 9 to produce a rotational motion in the opposite direction, so that the airflow is disorderly dispersed between the mixing cylinder 4 and the static mixing tube body 1, and flows upward. When it reaches the air outlet pipe 5, it will be further mixed, thereby improving the uniformity of the mixed gas and achieving a mixed gas with a stable concentration. In addition, by electrically connecting a gas detection sensor 12 to the detection tube 11, when the mixed gas contacts the sensitive material on the surface of the sensor, it will cause a change in the material properties, thereby changing the electrical signal output of the gas detection sensor 12, and then real-time monitoring of the gas concentration in the mixing cylinder 4. Thereby achieving the effect of detecting the mixing effect of the gas.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for mixing coal mine gas using a static mixer, comprising a static mixing tube body (1), flanges (2) being fixed to both end surfaces of the static mixing tube body (1), and a rounded plate (3) being fixed between the static mixing tube body (1) and the flange (2), characterized in that: A mixing cylinder (4) is fixed inside the static mixing tube body (1), an air outlet pipe (5) is fixed to one side wall of the static mixing tube body (1), an air inlet (6) is provided between the static mixing tube body (1) and the mixing cylinder (4), a rotating rod (7) is fixed to the side end surface of the air inlet (6) and the top of the rounded disc (3), the rotating rod (7) at the top is rotatably connected to a forward-rotating spiral blade (8), and the rotating rod (7) at the bottom is rotatably connected to a reverse-rotating spiral blade (9), and the forward-rotating spiral blade (8) and the reverse-rotating spiral blade (9) are arranged opposite to each other.

2. The device for mixing coal mine gas using a static mixer according to claim 1, characterized in that: The other side wall of the static mixing tube body (1) is provided with a detection port (10), a detection tube (11) is fixed to the inner wall of the detection port (10), and a gas detection sensor (12) is electrically connected to the top of the detection tube (11).

3. The device for mixing coal mine gas using a static mixer according to claim 1, characterized in that: The forward-rotating spiral blade (8) and the reverse-rotating spiral blade (9) are both composed of a plurality of split spiral blades (13) of different shapes, and arc surfaces (14) are respectively provided on both end surfaces of the split spiral blade (13), and the arc sizes of the plurality of arc surfaces (14) are inconsistent.

4. The device for mixing coal mine gas using a static mixer according to claim 1, characterized in that: The flange (2) is provided with a plurality of annularly distributed fastening screw grooves, and the inner walls of the plurality of fastening screw grooves are fixed with fastening bolts (15).

5. The device for mixing coal mine gas using a static mixer according to claim 1, characterized in that: A protective ring (16) is fixed on the outer surface of the plurality of flanges (2), and a protective material is fixed inside the protective ring (16).

6. The device for mixing coal mine gas using a static mixer according to claim 2, characterized in that: The detection tube (11) is arranged in parallel with the air outlet pipe (5).

7. The device for mixing coal mine gas using a static mixer according to claim 3, characterized in that: The plurality of split spiral leaves (13) are shaped in an axisymmetric structure.

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