A natural gas tail gas exhaust device

Abstract

The present application relates to natural gas tail gas treatment technical field, disclose a kind of natural gas tail gas emission device, including tail gas conveying mechanism, gas storage tank and gas collecting disc, the top of gas storage tank is inserted with first gas pipe, and gas hole is formed in first gas pipe;Gas storage tank is communicated with the lower part of gas supplement pipe;The upper portion of gas storage tank is communicated with second gas pipe;Tail gas conveying mechanism includes box, gas inlet pipe, adjusting column and drive unit, adjusting column is rotatably connected in the inside of box, drive unit can drive adjusting column rotation, adjusting column is equipped with gas inlet groove, adjusting column is equipped with first gas outlet groove, which is communicated with gas inlet groove, the number of first gas outlet groove is less than the number of gas storage tank by one;Second gas outlet groove is formed in the side of box, and the number of second gas outlet groove is same with the number of gas storage tank, and second gas outlet groove is respectively communicated with the second gas pipe of gas storage tank.The present application is simultaneously convenient to overhaul and replace gas storage tank while carrying out sufficient combustion to natural gas tail gas.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas tail gas treatment, and in particular to a natural gas tail gas emission device. Background Art

[0002] At present, the tail gas of natural gas extracted from oil fields is generally directly treated by combustion after being processed. However, because the tail gas still contains a certain amount of natural gas, this direct combustion method causes a large amount of natural gas waste. For this reason, people gradually adopt the method of generating electricity by burning the tail gas to realize the reuse of natural gas tail gas. However, this utilization method still has the following shortcomings in actual use:

[0003] 1. When the existing natural gas exhaust is burned, although the staff will blow a certain amount of oxygen or air into the combustion furnace to achieve exhaust combustion, the ratio of the blown oxygen or air to the exhaust does not meet the requirements of full combustion, and the exhaust combustion problem still exists in the actual use process;

[0004] 2. Existing storage tanks for collecting exhaust gas need to meet certain pressure resistance requirements. Therefore, regular maintenance and replacement are particularly important during the use of the storage tanks. However, when inspecting or replacing existing gas storage tanks, it is necessary to shut off the exhaust gas inlet and discharge the exhaust gas stored in the gas storage tank for combustion, which is inconvenient and causes a certain waste of resources.

[0005] Therefore, it is necessary to improve the existing technology to solve the above technical problems. Summary of the Invention

[0006] The present invention aims to provide a natural gas tail gas emission device, which can fully burn the natural gas tail gas and facilitate the inspection and replacement of the gas storage tank.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical solution: a natural gas exhaust emission device, comprising an exhaust gas conveying mechanism, a gas storage tank and a gas collecting plate, wherein at least two gas storage tanks are provided, a first gas delivery pipe is inserted into the top of the gas storage tank, one end of the first gas delivery pipe is connected to the gas collecting plate, and the other end of the first gas delivery pipe is connected to the lower part extending into the gas storage tank, an air outlet is formed on the first gas delivery pipe inside the gas storage tank, and the top of the gas collecting plate is connected to the air outlet pipe;

[0008] The lower part of the gas storage tank is connected to an air supply pipe, and a first solenoid valve is installed on the air supply pipe;

[0009] A second solenoid valve and an air pump are also installed on the first gas pipeline. The air pump is connected to the top surface of the gas storage tank. The second solenoid valve is used to control the on and off of the first gas pipeline.

[0010] The upper portion of the gas storage tank is connected to a second gas delivery pipe, and a third solenoid valve is installed on the second gas delivery pipe;

[0011] The exhaust gas conveying mechanism includes a box body, an air intake pipe, an adjusting column, and a driving unit. The adjusting column is rotatably connected to the inside of the box body. The driving unit can drive the adjusting column to rotate. The adjusting column is provided with an air intake groove with an open lower end along its axial direction. The adjusting column is provided with a first air outlet groove communicating with the air intake groove. The number of the first air outlet grooves is one less than the number of the air storage tanks. One end of the air intake pipe is connected to the air intake groove.

[0012] A second air outlet groove that can be aligned with and connected to the first air outlet groove is opened on the side of the box body. The number of the second air outlet grooves is the same as the number of the gas storage tanks, and the second air outlet grooves are respectively connected to the second gas pipes of the gas storage tanks.

[0013] The principle and advantage of this solution are: in actual application, the natural gas tail gas of the present invention enters the gas storage tank through the air inlet pipe, and oxygen or air enters the gas storage tank through the air inlet pipe. The tail gas and oxygen or air entering the gas storage tank enter the gas collection plate from the first gas pipe through the vacuum pump, and then are input into the combustion boiler through the air outlet pipe connected to the top of the gas collection plate for combustion.

[0014] The present invention ensures that the number of first air outlet grooves provided on the adjustment column is one less than the number of gas storage tanks, thereby ensuring that among two or more gas storage tanks, there is always one gas storage tank in a non-working state. When the gas storage tank needs to be inspected or replaced, it is only necessary to drive the adjustment column to rotate through the driving unit so that the second air outlet groove connected to the gas storage tank that needs to be inspected or replaced is not connected to the first air outlet groove on the adjustment column, while the remaining gas storage tanks are in use, and exhaust gas and oxygen / air can enter the gas storage tanks normally.

[0015] In this solution, some gas tanks are always in use, while one gas tank is in an out-of-use state. This makes it convenient for the staff to inspect or replace one of the gas tanks while the remaining gas tanks can still perform exhaust gas emission and power generation operations. The setting of the vacuum pump can fully evacuate the gas tank to be inspected or replaced and transport it to the gas collection plate, avoiding the need to clean the exhaust gas in the gas tank by combustion.

[0016] Preferably, as an improvement, the exhaust gas conveying mechanism further includes a regulating unit, the regulating unit including a rubber column, a first rotating shaft and a first motor, the first rotating shaft being coaxially fixedly connected to the rubber column, the rubber column being located at the first air outlet groove, the axial length of the rubber column being greater than the diameter of the first air outlet groove, the rubber column being provided with a notch groove along its circumference, and when the notch groove on the rubber column is directly opposite to one of the first air outlet grooves, the side wall of the rubber column can block the remaining first air outlet grooves;

[0017] One end of the first rotating shaft passes through the adjustment column and the box in sequence and extends to the top of the box, and the first rotating shaft rotates in conjunction with the adjustment column and the box. The first motor is connected to the box, and the output shaft of the first motor is connected to the first rotating shaft.

[0018] Beneficial Effects: In this solution, the adjustment unit uses a first motor to drive the first rotating shaft to rotate, thereby driving the rubber column to rotate, so that the notch of the rubber column is aligned with the gas tanks in use, so that the gas tanks in use can be stored in sequence and then used in sequence. This method can better utilize the gas storage and backup function of multiple gas tanks, making it easier to use the gas stored in each gas tank in sequence according to actual needs, which is more flexible and practical.

[0019] Compared with inputting exhaust gas into multiple gas tanks at the same time, this solution can store gas in each gas tank one by one before storing gas in the next gas tank. In this way, a single gas tank can store gas faster than storing gas in multiple tanks at the same time.

[0020] Preferably, as an improvement, a first sealing groove coaxially arranged with the air inlet groove is opened on the upper portion of the adjustment column, and a first sealing ring that is gap-matched with the first sealing groove is connected to the lower portion of the first rotating shaft.

[0021] Beneficial effects: This solution can achieve relative sealing protection between the adjustment column and the first rotating shaft, and make the rotation of the first rotating shaft more stable.

[0022] Preferably, as an improvement, there are four gas storage tanks, which are evenly distributed around the exhaust gas conveying mechanism; the box body is a rectangular box, and there are four second air outlet grooves on the box body, which are respectively located on the four sides of the box body; there are three first air outlet grooves opened on the adjusting column, and the three first air outlet grooves are arranged at 90° intervals in the same clockwise direction.

[0023] Beneficial Effects: This solution utilizes four gas tanks, which are distributed around the exhaust gas delivery mechanism. The three first gas outlet slots on the regulating column ensure that at least three of the four gas tanks are always in use, leaving the remaining tank easily accessible for inspection and maintenance. This allows power generation to continue while inspecting or replacing a gas tank.

[0024] Preferably, as an improvement, the drive unit includes a gear ring, a gear plate and a second motor, the bottom of the adjustment column is connected to the gear ring, the gear plate is connected to the output shaft of the second motor, and the gear ring and the gear plate are meshed with each other.

[0025] Beneficial effect: The driving unit in this solution uses a second motor to drive the gear plate to rotate, thereby driving the gear ring that is meshed with the gear plate to rotate, and then driving the adjusting column connected to the gear ring to rotate, so that it is convenient to change the position of the first air outlet groove on the adjusting column and the second air outlet groove on the box body, thereby facilitating the switching of the use status and maintenance status of the gas tank.

[0026] Preferably, as an improvement, the bottom end of the first gas pipe is a closed end, and the air outlet includes a first air outlet and a second air outlet, the first air outlet is located at the upper part of the first gas pipe inside the gas tank, and the second air outlet is located at the lower part of the first gas pipe inside the gas tank.

[0027] Beneficial effect: In this solution, the bottom end of the first gas pipe is a closed end, which can prevent the gas in the gas tank from entering through the bottom end of the first gas pipe. Since the relative molecular mass of natural gas is smaller than that of air, the natural gas and air or oxygen in the storage tank are stratified. Therefore, the gas outlet holes on the first gas pipe include a first gas outlet hole and a second gas outlet hole arranged in upper and lower layers, which makes it easier for the stratified natural gas and air or oxygen to be extracted in a certain ratio to achieve sufficient combustion.

[0028] Preferably, as an improvement, n first air outlet holes are provided at equal diameters along the circumference of the first air pipe, and m second air outlet holes are provided at equal diameters along the circumference of the first air pipe, and the values ​​of n and m are both greater than two.

[0029] Preferably, as an improvement, when the gas blown into the air supply pipe is oxygen, n:m=1:2.

[0030] Preferably, as an improvement, when the gas blown into the air supply pipe is air, n:m=1:10.

[0031] Beneficial effect: The setting of the first air outlet and the second air outlet on the first gas pipeline can extract natural gas and air or oxygen according to the ratio of n:m, and can still achieve full combustion of natural gas. This setting can fully and thoroughly burn the natural gas exhaust in the fuel boiler, thereby improving energy utilization.

[0032] When the gas blown into the air supply pipe is air, the oxygen concentration in the air is about 20%. Therefore, when the gas blown into the air supply pipe is air, the number of the second air outlet holes is greater than that when the gas blown into the air supply pipe is oxygen.

[0033] Preferably, as an improvement, a controller is further included, and the first solenoid valve, the second solenoid valve and the third solenoid valve are all electrically connected to the controller.

[0034] Beneficial effect: In this solution, the controller is used to automatically control the on and off of each electrical component, which is more automated.

[0035] Preferably, as an improvement, a pressure sensor and a natural gas concentration detection sensor are embedded on the top of the gas storage tank, and both the pressure sensor and the natural gas concentration detection sensor are electrically connected to the controller.

[0036] Beneficial effects: The pressure sensor is used to detect changes in the pressure value in the gas tank. The setting of the natural gas concentration detection sensor can detect the natural gas concentration in the gas tank, and then control the on and off of the first solenoid valve and the second solenoid valve through the controller, thereby controlling whether natural gas and air or oxygen enter the gas tank.

[0037] Preferably, as an improvement, an annular second sealing groove is provided on the inner side wall of the air inlet groove, and a second sealing ring is connected to the outer side wall of the air inlet pipe and is loosely matched with the second sealing groove.

[0038] Beneficial effect: The cooperation between the second sealing groove and the second sealing ring in this solution can achieve a sealed connection between the air intake pipe and the air intake groove.

[0039] Preferably, as an improvement, the bottom end of the adjusting column is connected to a plurality of connecting columns, and ends of the plurality of connecting columns away from the adjusting column are all connected to the end surface of the gear ring;

[0040] An annular third sealing groove is provided at the bottom end of the adjusting column, and a fixing ring is connected to the bottom end of the adjusting column. A through hole is provided in the center of the fixing ring, and the connecting column is located in the through hole of the fixing ring. A third sealing ring that is gap-matched with the third sealing groove is connected to the top surface of the fixing ring, and the fixing ring is fixedly connected to the bottom end of the box body.

[0041] Beneficial effect: The setting of the connecting column can achieve the effect of indirect connection between the adjusting column and the end face of the gear ring, and facilitate the connection of the fixing ring. The setting of the fixing ring in this scheme can, on the one hand, realize the limitation between the adjusting column and the box body, and on the other hand, realize the sealing between the fixing ring and the bottom of the adjusting column.

[0042] Preferably, as an improvement, an annular limiting groove is provided on the inner top wall of the box body, and a positioning block that is loosely matched with the limiting groove is connected to the top end of the adjusting column.

[0043] Beneficial effect: Such an arrangement can realize the positioning of the adjustment column relative to the box body, making the cooperation between the adjustment column and the box body more stable.

[0044] Preferably, as an improvement, a bottom plate is provided below the box body, and a support column is connected between the box body and the bottom plate.

[0045] Beneficial effect: The box body is connected to the bottom plate through the support column, and the bottom plate can make the entire exhaust gas conveying mechanism more stable.

[0046] Preferably, as an improvement, a treatment cylinder is provided in the first air outlet groove, and a dust removal net and a drying layer are sequentially provided inside the treatment cylinder along its axial direction.

[0047] Beneficial effects: The dust removal net can intercept the dust in the exhaust gas, and the setting of the drying layer can absorb the water in the exhaust gas.

[0048] Preferably, as an improvement, the processing cylinder and the first air outlet groove are detachably matched.

[0049] Beneficial effect: This arrangement makes it easy to disassemble and replace the treatment cylinder.

[0050] Preferably, as an improvement, a connecting ring is provided in the first air outlet groove, bolt rods are evenly distributed along the circumference on one side wall of the connecting ring, and a socket is provided on the processing cylinder, and the bolt rods can be inserted into the socket of the processing cylinder.

[0051] Beneficial effect: In this solution, the processing tube is plugged into the bolt rod in the first air outlet groove through the insertion hole opened thereon, so that the processing tube and the first air outlet groove can be detachably matched, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0053] Figure 2 A vertical cross-sectional view of the present invention;

[0054] Figure 3 Schematic diagram of the overall structure of the exhaust gas conveying mechanism in the present invention;

[0055] Figure 4 1 is an exploded view of the exhaust gas conveying mechanism of the present invention;

[0056] Figure 5 It is a vertical cross-sectional view of the box body in the present invention;

[0057] Figure 6 Schematic diagram of the overall structure of the regulating column in the present invention;

[0058] Figure 7 An axial cross-sectional view of the adjustment column of the present invention;

[0059] Figure 8 Schematic diagram of the overall structure of the fixing ring in the present invention;

[0060] Figure 9 Schematic diagram of the overall structure of the rubber column in the present invention;

[0061] Figure 10 It is an axial cross-sectional view of the treatment cylinder in the present invention;

[0062] Figure 11 It is a vertical cross-sectional view of the connection body between the gas storage tank and the first gas pipeline in the present invention. DETAILED DESCRIPTION

[0063] The following is further described in detail through specific implementation methods:

[0064] The reference numerals in the drawings of the specification include:

[0065] Box 1, gas storage tank 2, air inlet pipe 3, first air delivery pipe 4, air collecting plate 5, adjusting column 6, rubber column 7, fixing ring 8, treatment cylinder 9, second air outlet groove 101, support column 102, bottom plate 103, gear plate 104, limit groove 105, bolt hole 106, air supply pipe 201, second air delivery pipe 202, pressure sensor 203, natural gas concentration detection sensor 204, second sealing ring 301, second solenoid valve 401, air pump 402, first air outlet 403, second air outlet 404, air outlet pipe 501, positioning Block 601, first air outlet groove 602, gear ring 603, third sealing groove 604, air inlet groove 605, second sealing groove 606, first sealing groove 607, first rotating shaft 701, first motor 702, first sealing ring 703, notch groove 704, third sealing ring 801, dust removal net 901, drying layer 902, jack 903, second rotating shaft 1041, second motor 1042, first solenoid valve 2011, third solenoid valve 2021, connecting ring 6021, bolt rod 6022, connecting column 6031.

[0066] like Figures 1-11 As shown, this embodiment 1 provides a natural gas exhaust emission device, including an exhaust gas conveying mechanism, a gas storage tank 2 and a gas collecting plate 5. There are at least two gas storage tanks 2. In this embodiment, four gas storage tanks 2 are set as an example for explanation. The four gas storage tanks 2 are evenly distributed around the exhaust gas conveying mechanism.

[0067] The gas collecting plate 5 is located in the central position above the four gas storage tanks 2. An air outlet pipe 501 is connected to the top of the gas collecting plate 5. The end of the air outlet pipe 501 away from the gas collecting plate 5 is connected to the air inlet of the existing combustion boiler, so that the mixed gas in the gas storage tank 2 can enter the combustion boiler for combustion.

[0068] Combine Figure 1 and Figure 2As shown, a first gas pipe 4 is inserted into the top of the gas tank 2, one end of the first gas pipe 4 is connected to the gas collecting plate 5, and the other end of the first gas pipe 4 extends to the lower part of the gas tank 2. An air outlet is provided on the first gas pipe 4 inside the gas tank 2. In this embodiment, the bottom end of the first gas pipe 4 is a closed end. The closed setting of the first gas pipe 4 can prevent the gas in the gas tank 2 from entering through the bottom end of the first gas pipe 4.

[0069] The air outlet includes a first air outlet 403 and a second air outlet 404. The first air outlet 403 is located at the upper part of the first air pipe 4 inside the gas storage tank 2, and the second air outlet 404 is located at the lower part of the first air pipe 4 inside the gas storage tank 2. There are n first air outlets 403 with equal diameters along the circumference of the first air pipe 4, and there are m second air outlets 404 with equal diameters along the circumference of the first air pipe 4. The values ​​of n and m are both greater than two, and the ratio of n and m can meet the standard of full combustion of natural gas. In this embodiment, when the gas blown into the air supply pipe 201 is oxygen, n:m=1:2, and when the gas blown into the air supply pipe 201 is air, n:m=1:10.

[0070] The lower parts of the four gas storage tanks 2 are all connected to the gas supply pipe 201 , and the gas supply pipe 201 is installed with a first solenoid valve 2011 . The setting of the first solenoid valve 2011 facilitates the on-off control of the gas supply pipe 201 .

[0071] A second solenoid valve 401 and an air pump 402 are also installed on the first gas pipe 4. The air pump 402 is fixedly connected to the top surface of the gas storage tank 2. The second solenoid valve 401 is installed close to the gas collecting plate 5. The second solenoid valve 401 is used to control the on and off of the first gas pipe 4.

[0072] The upper portion of the gas storage tank 2 is connected to a second gas delivery pipe 202, and a third solenoid valve 2021 is installed on the second gas delivery pipe 202;

[0073] The exhaust gas conveying mechanism includes a box body 1, an air intake pipe 3, an adjusting column 6 and a driving unit. The adjusting column 6 is rotatably connected to the inside of the box body 1, and the driving unit can drive the adjusting column 6 to rotate. The adjusting column 6 is provided with an air intake groove 605 with an opening at the lower end along its axial direction, and a first air outlet groove 602 communicating with the air intake groove 605 is provided on the adjusting column 6. The first air outlet groove 602 is arranged perpendicular to the air intake groove 605, and the number of the first air outlet grooves 602 is one less than the number of the gas storage tank 2. In this embodiment, there are three first air outlet grooves 602 provided on the adjusting column 6, and the three first air outlet grooves 602 are arranged at 90° intervals in the same clockwise direction; one end of the air intake pipe 3 is connected to the air intake groove 605 and rotates relative to the air intake groove 605, specifically: Figure 7 As shown, an annular second sealing groove 606 is provided on the inner side wall of the air inlet groove 605. The second sealing groove 606 is located at the lower part of the air inlet groove 605. Figure 4As shown, a second sealing ring 301 is connected to the outer wall of the intake pipe 3, which is gap-matched with the second sealing groove 606. The second sealing ring 301 and the intake pipe 3 are integrally formed. Through the cooperation between the second sealing ring 301 and the second sealing groove 606, the intake pipe 3 can achieve relative rotation between the adjusting column 6 and the intake pipe 3, and at the same time, the intake pipe 3 can be connected with the intake groove 605.

[0074] A second air outlet groove 101 that can be aligned with and connected to the first air outlet groove 602 is provided on the side of the box body 1. The number of the second air outlet grooves 101 is the same as the number of the gas storage tanks 2. The box body 1 in this embodiment is a rectangular box, and there are four second air outlet grooves 101. The four second air outlet grooves 101 are respectively located on the four sides of the box body 1. The four second air outlet grooves 101 are respectively connected to the second gas pipes 202 on the four gas storage tanks 2. The setting of the second gas pipe 202 can realize the exhaust gas conveying mechanism to input gas into the gas storage tank 2, and the setting of the third solenoid valve 2021 can control the on and off of the second gas pipe 202.

[0075] When the above arrangement is in use, the collected exhaust gas enters the exhaust gas conveying mechanism and is input into the gas storage tank 2 through the second gas pipe 202 for gas mixing. The mixed gas is then pumped into the gas collecting plate 5 through the vacuum pump 402 to realize the processing, transportation and combustion of the entire exhaust gas.

[0076] like Figure 3 As shown, in this embodiment, a bottom plate 103 is provided below the box body 1 , support columns 102 are connected between the box body 1 and the bottom plate 103 , and the four corners of the bottom surface of the box body 1 are fixedly connected to the bottom plate 103 through the support columns 102 .

[0077] The exhaust gas conveying mechanism in this embodiment also includes an adjusting unit, which includes a rubber column 7, a first rotating shaft 701 and a first motor 702. The rubber column 7 is made of rubber material and has deformation ability. The first rotating shaft 701 is coaxially fixedly connected to the rubber column 7. The rubber column 7 is circumferentially slidably sleeved in the air inlet groove 605, and the rubber column 7 is located at the first air outlet groove 602. The axial length of the rubber column 7 is greater than the diameter of the first air outlet groove 602. This setting can enable the rubber column 7 to play a blocking and sealing role on the first air outlet groove 602.

[0078] A 90° notch 704 is formed along the circumference of the rubber column 7. The notch 704 facilitates exhaust gas entering the air inlet groove 605 to be discharged through one of the first air outlet grooves 602. When the notch 704 on the rubber column 7 is aligned with one of the first air outlet grooves 602, the sidewall of the rubber column 7 can block the remaining first air outlet grooves 602.

[0079] One end of the first rotating shaft 701 passes through the adjusting column 6 and the box body 1 in sequence and extends to the top of the box body 1, and the first rotating shaft 701 rotates in coordination with the adjusting column 6 and the box body 1. The first motor 702 is connected to the top of the box body 1, and the output shaft of the first motor 702 is fixedly connected to the first rotating shaft 701 through a coupling, so that the first motor 702 drives the rubber column 7 connected to the first rotating shaft to rotate, thereby changing the position of the notch groove 704 on the rubber column 7.

[0080] like Figure 7 and Figure 9 As shown, a first sealing groove 607 coaxially arranged with the air inlet groove 605 is provided on the upper part of the adjusting column 6, and a first sealing ring 703 is connected to the lower part of the first rotating shaft 701, which is loosely matched with the first sealing groove 607. After the first sealing ring 703 on the first rotating shaft 701 is inserted into the first sealing groove 607, it can not only achieve sealing protection between the adjusting column 6 and the first rotating shaft 701, but also ensure the stable rotation effect of the first rotating shaft 701.

[0081] During use, the rotation of the first motor 702 can drive the rubber column 7 to rotate. When the rubber column 7 rotates, any one of the three first air outlet grooves 602 can be located at the notch groove 704, thereby facilitating the exhaust gas to enter the first air outlet groove 602, and enter the second air pipe 202 connected to the second air outlet groove 101 through the first air outlet groove 602, and finally enter the corresponding air storage tank 2 for mixing.

[0082] Combine Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, in this embodiment, the driving unit includes a gear ring 603, a gear plate 104 and a second motor 1042. The bottom of the adjusting column 6 is connected to the gear ring 603. In this embodiment, the bottom end of the adjusting column 6 is fixedly connected to a plurality of connecting columns 6031. The plurality of connecting columns 6031 are evenly distributed along the circumference of the adjusting column 6. The ends of the plurality of connecting columns 6031 away from the adjusting column 6 are all connected to the end face of the same gear ring 603. The gear plate 104 is connected to the output shaft of the second motor 1042. In this embodiment, the bottom surface of the gear plate 104 is coaxially fixedly connected to the second rotating shaft 1041. The second rotating shaft 1041 is embedded and fixed on the output shaft of the second motor 1042. The gear ring 603 and the gear plate 104 are engaged with each other, and the second motor 1042 is fixed on the base plate 103.

[0083] When the above arrangement is in use, the gear plate 104 can be driven to rotate by the operation of the second motor 1042. Due to the meshing arrangement between the gear ring 603 and the gear plate 104, the gear ring 603 drives the adjusting column 6 to rotate. When the adjusting column 6 rotates, the three first air outlet grooves 602 on the adjusting column 6 can be selectively aligned with three of the four second air outlet grooves 101. In this way, there are always three gas tanks 2 in a usable state, and one gas tank 2 can be in a state of inspection and maintenance. In this way, when inspecting and maintaining one of the gas tanks 2, there is always a gas tank 2 that can discharge exhaust gas and generate electricity.

[0084] like Figure 6 and Figure 7 As shown, the bottom end of the adjusting column 6 is provided with an annular third sealing groove 604. Figure 8 As shown, the bottom end of the adjusting column 6 is connected to a fixing ring 8, and a through hole is opened in the center of the fixing ring 8. The connecting column 6031 is located in the through hole of the fixing ring 8, so that the connecting column 6031 connected to the bottom end of the adjusting column 6 can pass through the through hole. The top surface of the fixing ring 8 is connected to a third sealing ring 801 that is loosely matched with the third sealing groove 604. The fixing ring 8 is fixedly connected to the bottom end of the box body 1, and is combined with the fixing ring 8. Figure 5 and Figure 8 As shown, in this embodiment, bolt holes 106 are circumferentially provided on the fixing ring 8 and the bottom of the box body 1, and the third sealing ring 801 on the fixing ring 8 is inserted into the third sealing groove 604 at the bottom end of the adjusting column 6. The adjusting column 6 can rotate coaxially along the fixing ring 8, and the end face of the fixing ring 8 is sealed with the bottom end of the box body 1, and the fixing ring 8 and the bottom end of the box body 1 are connected and fixed by screwing bolts into the bolt holes 106 at the bottom of the fixing ring 8 and the box body 1. Such an arrangement can realize the limitation between the adjusting column 6 and the box body 1 on the one hand, and can also realize the sealing between the fixing ring 8 and the adjusting column 6 at the same time.

[0085] like Figure 4 and Figure 5 As shown, an annular limiting groove 105 is provided on the inner top wall of the box body 1, and a positioning block 601 is connected to the top end of the adjusting column 6, which is loosely matched with the limiting groove 105. In this way, the adjusting column 6 and the box body 1 can be rotated together, and the cooperation between the limiting groove 105 and the positioning block 601 can guide the rotation of the adjusting column 6.

[0086] Example 2 Figure 4 、 Figure 7 and Figure 10As shown, a treatment cylinder 9 is provided in the first air outlet groove 602, and a dust removal net 901 and a drying layer 902 are sequentially provided inside the treatment cylinder 9 along its axial direction, wherein the dust removal net 901 is close to the side of the air inlet groove 605. The dust removal net 901 can intercept dust in the exhaust gas, and the setting of the drying layer 902 can adsorb water in the exhaust gas.

[0087] The treatment cylinder 9 is detachably matched with the first gas outlet groove 602. Specifically, a connecting ring 6021 is provided in the first gas outlet groove 602. Bolt rods 6022 are evenly distributed along the circumference on one side wall of the connecting ring 6021. In this embodiment, the bolt rods 6022 are located on the side of the connecting ring 6021 away from the gas inlet groove 605. Figure 10 As shown, a socket 903 is provided on the processing cylinder 9, and the bolt rod 6022 can be inserted into the socket 903 of the processing cylinder 9, thereby realizing a detachable matching relationship between the processing cylinder 9 and the first air outlet groove 602, which makes it more convenient to disassemble and replace the processing cylinder 9 and more practical.

[0088] The difference between Example 3 and Example 1 is that a natural gas exhaust emission device in this embodiment also includes a controller, and the first solenoid valve 2011, the second solenoid valve 401 and the third solenoid valve 2021 are all electrically connected to the controller. The controller in this embodiment is set to facilitate the control of various electrical components in this device.

[0089] like Figure 1 and Figure 11 As shown, a pressure sensor 203 and a natural gas concentration detection sensor 204 are embedded on the top of the gas storage tank 2 , and the pressure sensor 203 and the natural gas concentration detection sensor 204 are respectively located on both sides of the air extraction pump 402 .

[0090] The pressure sensor 203 and the natural gas concentration detection sensor 204 are both electrically connected to the controller. The pressure sensor 203 is used to detect changes in the pressure value in the gas tank 2. The natural gas concentration detection sensor 204 is set to detect the natural gas concentration in the gas tank 2. Specifically, when the pressure sensor 203 detects that the concentration in the gas tank 2 reaches a predetermined value, the controller will control the third solenoid valve 2021 to close. The natural gas concentration detection sensor 204 is set so that when the gas concentration reaches a predetermined value, the controller will control the first solenoid valve 2011 to close.

[0091] The present invention also provides a method for generating electricity using a natural gas tail gas emission device according to the above embodiment, the method specifically comprising the following steps:

[0092] S1: The natural gas tail gas purified by the natural gas purification device enters the air inlet groove 605 of the regulating column 6 through the air inlet pipe 3;

[0093] S2: The exhaust gas entering the air inlet groove 605 enters one of the first air outlet grooves 602 through the notch groove 704 on the rubber column 7;

[0094] S3: The exhaust gas entering the first gas outlet groove 602 passes through the second gas outlet groove 101 and the second gas transmission pipe 202 in sequence and enters the corresponding gas storage tank 2 for storage;

[0095] S4: When the pressure sensor 203 detects that the gas pressure in the gas storage tank 2 reaches a predetermined value, the third solenoid valve 2021 is controlled to close the exhaust gas from the gas storage tank 2 and continue to be input;

[0096] S5: Blowing oxygen or air into the gas tank 2 through the gas supply pipe 201 to mix with the tail gas in the gas tank 2, and detecting the natural gas concentration in the gas tank 2 through the natural gas concentration detection sensor 204, so that the natural gas tail gas in the gas tank 2 and oxygen are mixed to achieve a sufficient combustion ratio;

[0097] S6: The mixed gas in the gas storage tank 2 is then pumped into the gas collecting plate 5 through the first gas pipe 4 by the gas pump 402;

[0098] S7: The gas drawn into the gas collecting plate 5 is input into the combustion boiler through the gas outlet pipe 501 for combustion, and the heat energy generated by the combustion is used to generate electricity through the thermal power generation device;

[0099] S8: When the gas in any one of the gas storage tanks 2 is fully stored, the first motor 702 is rotated to drive the rubber column 7 to rotate 90°, so that the notch 704 on the rubber column 7 is matched with any one of the remaining two first gas outlet grooves 602, and then steps S1-S7 are repeated to operate.

[0100] The present invention cooperates with the air supply pipe 201 and the natural gas concentration detection sensor 204 to perform real-time detection of the natural gas concentration in the gas tank 2 when air or oxygen is blown into the air supply pipe 201, so that the concentration ratio of natural gas to air or oxygen in the gas tank 2 meets the requirements of full combustion. At the same time, because the relative molecular mass of natural gas is smaller than that of air, there is a stratification phenomenon between the natural gas and the air or oxygen in the storage tank. The first air outlet 403 and the second air outlet 404 on the first gas transmission pipe 4 can extract the natural gas and air or oxygen according to the ratio of n:m, and can still achieve full combustion of natural gas. This setting can fully and thoroughly burn the natural gas exhaust in the fuel boiler, thereby improving energy utilization.

[0101] The present invention adjusts the column 6 by providing the three first air outlet grooves 602. When the gas tank 2 needs to be repaired or replaced, the gear plate 104 can be rotated by rotating the second motor 1042, thereby driving the gear ring 603 to rotate to facilitate the rotation of the adjustment column 6 in the box body 1.

[0102] When the adjusting column 6 rotates, there are always three gas tanks 2 in use, and the remaining one is in a state of waiting for inspection or replacement. In this way, when the staff is inspecting or replacing the gas tank 2, the remaining gas tanks 2 can still perform power generation operations, and the setting of the vacuum pump 402 can fully evacuate the gas tank 2 to be inspected or replaced, and transport it to the gas collecting plate 5, avoiding the need to clean the exhaust gas in the gas tank 2 by combustion.

[0103] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A natural gas tail gas emission device, characterized by: It includes an exhaust gas conveying mechanism, an air storage tank and an air collecting plate. There are at least two air storage tanks. A first air delivery pipe is inserted into the top of the air storage tank. One end of the first air delivery pipe is connected to the air collecting plate. The other end of the first air delivery pipe extends to the lower part of the air storage tank. An air outlet is opened on the first air delivery pipe inside the air storage tank. The top of the air collecting plate is connected to the air outlet pipe. The lower part of the gas storage tank is connected to an air supply pipe, and a first solenoid valve is installed on the air supply pipe; A second solenoid valve and an air pump are also installed on the first gas pipeline. The air pump is connected to the top surface of the gas storage tank. The second solenoid valve is used to control the on and off of the first gas pipeline. The upper portion of the gas storage tank is connected to a second gas delivery pipe, and a third solenoid valve is installed on the second gas delivery pipe; The exhaust gas conveying mechanism includes a box body, an air intake pipe, an adjusting column, and a driving unit. The adjusting column is rotatably connected to the inside of the box body. The driving unit can drive the adjusting column to rotate. The adjusting column is provided with an air intake groove with an open lower end along its axial direction. The adjusting column is provided with a first air outlet groove communicating with the air intake groove. The number of the first air outlet grooves is one less than the number of the air storage tanks. One end of the air intake pipe is connected to the air intake groove. The side of the box body is provided with a second air outlet groove that can be aligned with and connected to the first air outlet groove. The number of the second air outlet grooves is the same as the number of the gas storage tanks, and the second air outlet grooves are respectively connected to the second gas pipes of the gas storage tanks; The exhaust gas conveying mechanism also includes a regulating unit, the regulating unit including a rubber column, a first rotating shaft and a first motor, the first rotating shaft being coaxially fixedly connected to the rubber column, the rubber column being located at the first air outlet groove, the axial length of the rubber column being greater than the diameter of the first air outlet groove, the rubber column being provided with a notch groove along its circumference, and when the notch groove on the rubber column is directly opposite to one of the first air outlet grooves, the side wall of the rubber column can block the remaining first air outlet grooves; One end of the first rotating shaft passes through the adjustment column and the box in sequence and extends to the top of the box, and the first rotating shaft rotates in conjunction with the adjustment column and the box. The first motor is connected to the box, and the output shaft of the first motor is connected to the first rotating shaft.

2. A natural gas tail gas emission device according to claim 1, characterized in that: A first sealing groove coaxially arranged with the air inlet groove is formed on the upper portion of the regulating column, and a first sealing ring with a clearance fit with the first sealing groove is connected to the lower portion of the first rotating shaft.

3. The natural gas tail gas emission device according to claim 1, characterized in that: There are four air storage tanks, which are evenly distributed around the exhaust gas conveying mechanism; the box body is a rectangular box, and there are four second air outlet grooves on the box body, which are respectively located on the four sides of the box body; there are three first air outlet grooves on the adjusting column, and the three first air outlet grooves are arranged at 90° intervals in the same clockwise direction.

4. The natural gas tail gas emission device according to claim 1, characterized in that: The driving unit includes a gear ring, a gear plate and a second motor. The bottom of the adjusting column is connected to the gear ring. The gear plate is connected to the output shaft of the second motor. The gear ring and the gear plate are meshed with each other.

5. The natural gas tail gas emission device according to claim 1, characterized in that: The bottom end of the first gas pipe is a closed end, and the gas outlet includes a first gas outlet and a second gas outlet. The first gas outlet is located at the upper part of the first gas pipe inside the gas tank, and the second gas outlet is located at the lower part of the first gas pipe inside the gas tank.

6. The natural gas tail gas emission device according to claim 5, characterized in that: There are n first air outlet holes arranged at equal diameters along the circumference of the first air pipe, and there are m second air outlet holes arranged at equal diameters along the circumference of the first air pipe, and the values ​​of n and m are both greater than two.

7. The natural gas tail gas emission device according to claim 6, characterized in that: When the gas blown into the air supply pipe is oxygen, n:m=1:

2.

8. The natural gas tail gas emission device according to claim 6, characterized in that: When the gas blown into the air supply pipe is air, n:m=1:

10.

9. The natural gas tail gas emission device according to claim 1, characterized in that: A controller is also included, and the first solenoid valve, the second solenoid valve and the third solenoid valve are all electrically connected to the controller.

10. The natural gas tail gas emission device according to claim 9, characterized in that: A pressure sensor and a natural gas concentration detection sensor are embedded on the top of the gas storage tank, and both the pressure sensor and the natural gas concentration detection sensor are electrically connected to the controller.

11. The natural gas tail gas emission device according to claim 1, characterized in that: An annular second sealing groove is provided on the inner side wall of the air intake groove, and a second sealing ring is connected to the outer side wall of the air intake pipe and is loosely matched with the second sealing groove.

12. The natural gas tail gas emission device according to claim 4, characterized in that: The bottom end of the adjusting column is connected to a plurality of connecting columns, and ends of the connecting columns away from the adjusting column are all connected to the end surface of the gear ring; An annular third sealing groove is provided at the bottom end of the adjusting column, and a fixing ring is connected to the bottom end of the adjusting column. A through hole is provided in the center of the fixing ring, and the connecting column is located in the through hole of the fixing ring. A third sealing ring that is gap-matched with the third sealing groove is connected to the top surface of the fixing ring, and the fixing ring is fixedly connected to the bottom end of the box body.

13. The natural gas tail gas emission device according to claim 1, characterized in that: An annular limiting groove is provided on the inner top wall of the box body, and a positioning block which is loosely matched with the limiting groove is connected to the top end of the adjusting column.

14. The natural gas tail gas emission device according to claim 1, characterized in that: A bottom plate is provided below the box body, and a support column is connected between the box body and the bottom plate.

15. A natural gas tail gas discharge device according to any one of claims 1 to 14, characterized in that: A processing cylinder is provided in the first air outlet groove, and a dust removal net and a drying layer are sequentially provided inside the processing cylinder along the axial direction thereof.

16. The natural gas tail gas emission device according to claim 15, characterized in that: The processing cylinder and the first air outlet groove are detachably matched.

17. The natural gas tail gas emission device according to claim 16, characterized in that: A connecting ring is provided in the first air outlet groove, and bolt rods are evenly distributed along the circumference on one side wall of the connecting ring. An insertion hole is provided on the processing cylinder, and the bolt rods can be inserted into the insertion hole of the processing cylinder.

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