Methane purification equipment for biogas of sewage treatment plant

Abstract

The utility model relates to the technical field of methane purification, and discloses methane purification equipment for methane in a sewage treatment plant, which comprises a bottom plate, and further comprises a purification tower and a purification box which are respectively arranged on two sides of the top of the bottom plate, filter pipes are communicated with the front and the rear of the left side of the purification tower, and the other end of each filter pipe is communicated with a gas inlet pipe through a three-way pipe; the first electromagnetic valve is arranged on the surface of one end of the filtering pipe, a filtering net is arranged in the filtering pipe, a supporting plate is fixedly connected to the interior of the filtering pipe, a rotating rod is rotatably connected to the interior of the supporting plate, and a cleaning plate is fixedly connected to one end of the rotating rod; a driving structure for driving the rotating rod to rotate is arranged in the filtering pipe; according to the utility model, not only can the entering biogas be filtered, but also the biogas can enter from the other filter pipe under the condition that the device is not stopped, and meanwhile, the filter screen in the filter pipe can be cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of biogas purification, in particular to methane purification equipment for biogas in sewage treatment plants. Background Art

[0002] Biogas is a combustible gas with a high calorific value. Purified as needed, it can be converted into higher-value natural gas. This can be directly incorporated into the gas supply network or pressurized and liquefied to become compressed or liquefied natural gas (CNG), both of which offer greater utilization value and can generate greater economic benefits. Biogas has a complex composition, typically containing ammonia, nitrogen, oxygen, sulfur, alkanes, acids, benzene, oxides, salts, or their derivatives, as well as solid particles, which can significantly impact its application.

[0003] After searching, it was found that a device for biogas purification is disclosed in Chinese patent documents [Announcement No.: CN217628268U]. This device for biogas purification includes a purification tower, an air inlet pipe, a drying box and an air inlet branch pipe are connected to one side of the bottom of the purification tower, a desulfurization filler layer and a decarbonization filler layer are installed inside the purification tower, an air outlet and an activated carbon filter are installed on the top of the purification tower, a return air pipe is installed between the air outlet and the purification tower, a gas detector and a first electric control valve are installed on the air outlet, and a second electric control valve is installed on the return air pipe. The purification device disclosed in this patent can dry, desulfurize, decarbonize and filter and purify biogas, and the purification efficiency is relatively high. However, the device still has shortcomings in actual use. When the biogas enters, it will contain a lot of impurities, and these impurities will accompany the entry of the biogas, thereby affecting the effect of subsequent purification. Utility Model Content

[0004] The purpose of the utility model is to provide a methane purification device for biogas in a sewage treatment plant to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a methane purification device for biogas in a sewage treatment plant, comprising a bottom plate and:

[0006] A purification tower and a purification box are respectively arranged on both sides of the top of the bottom plate, and the front and rear sides of the left side of the purification tower are connected to a filter tube, and the other end of the filter tube is connected to the air inlet pipe through a tee pipe;

[0007] a first solenoid valve provided on one end surface of the filter tube, a filter screen provided inside the filter tube, a support plate fixedly connected to the inside of the filter tube, a rotating rod rotatably connected to the inside of the support plate, a cleaning plate fixedly connected to one end of the rotating rod, and a driving structure for driving the rotating rod to rotate provided inside the filter tube;

[0008] A desulfurization packing layer and a decarbonization packing layer are respectively arranged inside the purification tower. An air outlet pipe is connected between the top of the decarbonization packing layer and the purification box. A gas detector is arranged on the surface of the air outlet pipe. Activated carbon and a drying layer are respectively arranged inside the purification box.

[0009] Preferably, the driving structure includes a driving motor fixed to the top of the filter tube, a transmission rod fixed to the output end of the driving motor, a first bevel gear fixed to the other end of the transmission rod, and a second bevel gear fixed to the other end of the rotating rod, and the other side of the first bevel gear is meshed with one side of the second bevel gear.

[0010] Preferably, a collecting box is fixedly connected to the bottom of the filter tube, and a collecting box for collecting impurities is movably connected inside the collecting box.

[0011] Preferably, the rear of the air outlet pipe is connected to a return air pipe, and the other end of the return air pipe is connected to the rear of the purification tower.

[0012] Preferably, a second solenoid valve is provided on the surface of one end of the return air pipe, a third solenoid valve is provided on the surface of the outlet air pipe, and the third solenoid valve is located below the gas detector.

[0013] Preferably, the desulfurization filler layer is a biological filler layer, and the decarbonization filler layer is a propylene carbonate filler layer.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model is connected to a filter tube at the left end of each purification tower, and a filter screen is provided inside the filter tube, so that the filter screen can filter the incoming biogas. In addition, a first solenoid valve is provided on one end surface of the filter tube. When the filter screen inside the filter tube is clogged, the other first solenoid valve can be opened without stopping the device, so that the biogas enters and is filtered from the inside of the other filter tube.

[0016] 2. After the filter screen has filtered the biogas multiple times, in order not to affect the filtering effect, the utility model can drive the rotating rod to rotate through the driving structure, and drive the cleaning plate to rotate together, thereby facilitating the cleaning of the filter screen to facilitate better subsequent filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present utility model;

[0018] Figure 2 It is a rear view structural diagram of the present utility model;

[0019] Figure 3It is a schematic diagram of the cross-sectional structure of the present utility model;

[0020] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the present utility model;

[0021] Figure 5 For this utility model Figure 4 A partial enlarged view of point A in the middle.

[0022] In the figure: 1. bottom plate; 2. purification tower; 3. filter tube; 4. air inlet pipe; 5. filter screen; 6. second solenoid valve; 7. rotating rod; 8. cleaning plate; 9. driving structure; 91. driving motor; 92. transmission rod; 93. first bevel gear; 94. second bevel gear; 10. support plate; 11. collecting box; 12. collecting box; 13. first solenoid valve; 14. desulfurization packing layer; 15. decarbonization packing layer; 16. air outlet pipe; 17. gas detector; 18. third solenoid valve; 19. purification box; 20. activated carbon; 21. drying layer; 22. return air pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-5 As shown, the methane purification equipment for biogas in a sewage treatment plant includes a base plate 1, and a purification tower 2 and a purification box 19 are respectively provided on both sides of the top of the base plate 1. The front and rear sides of the left side of the purification tower 2 are connected with a filter pipe 3, and the other end of the filter pipe 3 is connected with an air inlet pipe 4 through a three-way pipe. A first solenoid valve 13 is provided on the surface of one end of the filter pipe 3, and a filter screen 5 is provided inside the filter pipe 3. The inside of the filter pipe 3 is fixedly connected with a support plate 10, and the inside of the support plate 10 is rotatably connected with a rotating rod 7, and one end of the rotating rod 7 is fixedly connected with a cleaning plate 8. A driving structure 9 for driving the rotating rod 7 to rotate is provided inside the filter pipe 3, and a desulfurization packing layer 14 and a decarbonization packing layer 15 are respectively provided inside the purification tower 2. An outlet pipe 16 is connected between the top of the decarbonization packing layer 15 and the purification box 19, and a gas detector 17 is provided on the surface of the outlet pipe 16. Activated carbon 20 and a drying layer 21 are respectively provided inside the purification box 19.

[0025] The driving structure 9 includes a driving motor 91, a transmission rod 92, a first bevel gear 93 and a second bevel gear 94. The driving motor 91 is fixed to the top of the filter tube 3, and the output shaft of the driving motor 91 is fixed to one end of the transmission rod 92. The other end of the transmission rod 92 extends to the interior of the filter tube 3 and is fixed to one side of the first bevel gear 93. The other side of the first bevel gear 93 is meshed with one side of the second bevel gear 94. One side of the second bevel gear 94 is fixed to the other end of the rotating rod 7. In this way, when the rotating rod 7 is driven to rotate, the driving motor 91 can be started, and the transmission rod 92 can be driven to rotate, and the first bevel gear 93 can be driven to rotate, thereby driving the second bevel gear 94 and the rotating rod 7 to rotate, so as to facilitate driving the cleaning plate 8 to clean the surface of the filter screen 5.

[0026] A collecting box 11 is fixedly connected to the bottom of the filter tube 3, and a collection box 12 for collecting impurities is movably connected inside the collecting box 11. In this way, after the surface of the filter screen 5 is cleaned, the cleaned impurities will fall into the inside of the collecting box 11, and then fall into the inside of the collection box 12 for collection, so as to facilitate subsequent pulling out and cleaning.

[0027] The rear of the outlet pipe 16 is connected to a return pipe 22, and the other end of the return pipe 22 is connected to the rear of the purification tower 2. In this way, after the gas detector 17 detects unqualified gas, it can be re-transported to the interior of the purification tower 2 through the return pipe 22 to facilitate subsequent purification, thereby improving the purification effect.

[0028] A second solenoid valve 6 is provided on the surface of one end of the return air pipe 22, and a third solenoid valve 18 is provided on the surface of the outlet pipe 16, and the third solenoid valve 18 is located below the gas detector 17. In this way, after the gas detector 17 detects unqualified gas, the second solenoid valve 6 is opened and the third solenoid valve 18 is closed. At this time, the gas will enter the interior of the purification tower 2 through the return air pipe 22.

[0029] The desulfurization filler layer 14 is a biological filler layer, and the decarbonization filler layer 15 is a propylene carbonate filler layer, which facilitates the desulfurization and decarbonization treatment of the biogas.

[0030] It is worth noting that: the technical features proposed in this technical solution should be regarded as prior art, and the specific structure, working principle, and possible control method and spatial layout method of these technical features can be selected by conventional options in the field, and this technical solution will not further elaborate on them.

[0031] Working principle: When in use, biogas can enter through the air inlet pipe 4, and then the first solenoid valve 13 at one end of the front filter pipe 3 is closed. At this time, the biogas will enter through the rear filter pipe 3 and filter the impurity particles in the biogas through the filter mesh 5. The filtered gas will enter the interior of the purification tower 2, and then pass through the desulfurization filler layer 14 and the decarbonization filler layer 15 to desulfurize and decarbonize the biogas. Then the biogas will enter the interior of the outlet pipe 16. At this time, the purified biogas can be tested by the gas detector 17. If it meets the purification requirements, it will be discharged into the interior of the purification box 19, and the moisture in the biogas will be adsorbed and filtered through the drying layer 21. It can then be discharged. When the biogas that does not meet the requirements is detected, the third solenoid valve 18 can be closed and the second solenoid valve 6 can be opened. At this time, the gas will enter the interior of the purification tower 2 through the return pipe 22 for re-purification, and so on.

[0032] When biogas continues to enter, in order to improve the filtering effect, the first solenoid valve 13 at the rear can be closed and the first solenoid valve 13 on the surface of the front filter tube 3 can be opened. At this time, the biogas will be filtered through the filter mesh 5 inside the front filter tube 3, and then can continue to be transported to the purification tower 2. After that, the driving structure 9 inside the rear filter tube 3 can be used to drive the rotating rod 7 to rotate, and at the same time drive the cleaning plate 8 to rotate, so that the cleaning plate 8 can clean the surface of the filter mesh 5, and the cleaned impurities can fall into the inside of the collection box 12 for collection.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A methane purification device for biogas in a sewage treatment plant, comprising a bottom plate (1), characterized in that: Also includes: A purification tower (2) and a purification box (19) are respectively arranged on both sides of the top of the bottom plate (1); the front and rear sides of the left side of the purification tower (2) are both connected to a filter tube (3); the other end of the filter tube (3) is connected to an air inlet pipe (4) through a three-way pipe; a first solenoid valve (13) provided on one end surface of the filter tube (3); a filter screen (5) provided inside the filter tube (3); a support plate (10) fixedly connected inside the filter tube (3); a rotating rod (7) rotatably connected inside the support plate (10); a cleaning plate (8) fixedly connected to one end of the rotating rod (7); and a driving structure (9) for driving the rotating rod (7) to rotate provided inside the filter tube (3); A desulfurization packing layer (14) and a decarbonization packing layer (15) are respectively arranged inside the purification tower (2), an outlet pipe (16) is connected between the top of the decarbonization packing layer (15) and the purification box (19), a gas detector (17) is provided on the surface of the outlet pipe (16), and activated carbon (20) and a drying layer (21) are respectively provided inside the purification box (19).

2. The methane purification equipment for biogas from sewage treatment plants according to claim 1, characterized in that: The driving structure (9) comprises a driving motor (91) fixed to the top of the filter tube (3), a transmission rod (92) fixed to the output end of the driving motor (91), a first bevel gear (93) fixed to the other end of the transmission rod (92), and a second bevel gear (94) fixed to the other end of the rotating rod (7), wherein the other side of the first bevel gear (93) is meshed with one side of the second bevel gear (94).

3. The methane purification equipment for biogas from sewage treatment plants according to claim 1, characterized in that: The bottom of the filter tube (3) is fixedly connected to a collecting box (11), and the interior of the collecting box (11) is movably connected to a collecting box (12) for collecting impurities.

4. The methane purification equipment for biogas in sewage treatment plants according to claim 1, characterized in that: The rear of the gas outlet pipe (16) is connected to a gas return pipe (22), and the other end of the gas return pipe (22) is connected to the rear of the purification tower (2).

5. The methane purification equipment for biogas in sewage treatment plants according to claim 4, characterized in that: A second solenoid valve (6) is provided on the surface of one end of the return air pipe (22), a third solenoid valve (18) is provided on the surface of the outlet air pipe (16), and the third solenoid valve (18) is located below the gas detector (17).

6. The methane purification equipment for biogas in sewage treatment plants according to claim 1, characterized in that: The desulfurization filler layer (14) is a biological filler layer, and the decarbonization filler layer (15) is a propylene carbonate filler layer.

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