A purification tower for biogas purification

Abstract

The present invention relates to the technical field of purification towers, and specifically discloses a purification tower for biogas purification, comprising a purification tower, a packing layer is arranged in the middle of the purification tower, a support frame is arranged at the bottom of the purification tower; a trough-disc gas-liquid distributor, the trough-disc gas-liquid distributor is installed on the inner wall of the purification tower, the trough-disc gas-liquid distributor is located below the packing layer, an air intake assembly is arranged on the side wall of the purification tower, and the air intake assembly is located below the trough-disc gas-liquid distributor; an isobaric flow equalizing device, the isobaric flow equalizing device is located above the packing layer, the isobaric flow equalizing device comprises a support sleeve, and the support sleeve is fixedly installed on the inner wall of the purification tower. The present invention improves the uniform distribution effect of liquid by arranging multiple water diversion pipes and arranging multiple drainage holes on the side wall of a single water diversion pipe, has an isobaric flow equalizing conveying structure for liquid, and reduces the possibility of channel flow, bias flow, and wall flow.

Description

Technical Field

[0001] The invention relates to the technical field of purification towers, and in particular to a purification tower for biogas purification. Background Art

[0002] Biogas purification tower is a kind of equipment used to improve the purity of methane in biogas. It is usually used to remove carbon dioxide and other impurities in biogas and improve the calorific value during combustion. At present, the biogas purification methods at home and abroad are mainly divided into: adsorption method, absorption method, membrane separation method, low temperature separation method, methane in situ enrichment method and biotechnology purification method, among which pressurized water washing method is a kind of absorption method. During pressurized water washing, carbon dioxide dissolves in water, while the amount of methane dissolved in water is much less than that of carbon dioxide. It can be considered that methane is almost insoluble in water. Therefore, methane is enriched at the top of the water washing tower and collected. When the pressure is reduced, the carbon dioxide dissolved in the water is desorbed, realizing the separation of methane and carbon dioxide and completing the purification of biogas. At the same time, wastewater containing carbon dioxide and methane can be regenerated by air blowing for recycling.

[0003] A Chinese patent (CN216024022U) discloses a pressurized water washing device for purifying water-washed biogas, including a water washing tower, the water washing tower including a shell, a water pipe and a positioning cover are wound on the outer wall of the shell, the positioning cover is arranged on the outside of the water pipe, and thermal insulation cotton is bonded to the inner wall of the positioning cover, and also includes a waste gas treatment device, the waste gas treatment device includes a dehumidification box and an absorption box.

[0004] However, there are some disadvantages in the above-mentioned related technologies. For example, in a washing tower, since the liquid is generally transported into the tower through several points on the pipeline, the flow rate at the point close to the water inlet is greater than the flow rate at the point far from the water inlet, resulting in uneven liquid distribution, channeling, deviation and wall flow, which are prone to occur, resulting in the amplification effect and end effect of the packed tower. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a purification tower for biogas purification, which can solve the problems raised in the above background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A purification tower for biogas purification, comprising:

[0008] A purification tower, wherein a packing layer is disposed in the middle of the purification tower and a support frame is disposed at the bottom end of the purification tower;

[0009] A trough-disc type gas-liquid distributor, which is installed on the inner wall of the purification tower and is located below the packing layer. An air intake assembly is provided on the side wall of the purification tower and is located below the trough-disc type gas-liquid distributor;

[0010] An isobaric flow balancing device, the isobaric flow balancing device is located above the packing layer, the isobaric flow balancing device comprises a support sleeve, the support sleeve is fixedly mounted on the inner wall of the purification tower, the inner wall of the support sleeve is provided with a rubber layer, a top cover is installed at the top end of the support sleeve, a support box is fixedly installed at the bottom end of the top cover, a plurality of air ducts distributed in an array are penetrated between the support box and the support sleeve, a plurality of water ducts distributed in an array are penetrated through the bottom wall of the support box, a plurality of drainage holes are provided on the side wall of the water duct, a support block is provided on the top end of the water duct, and a water inlet assembly for conveying liquid to the water duct is provided on the side wall of the purification tower;

[0011] A flow regulating device, the flow regulating device is used to adjust the effective drainage area of ​​the drainage hole, the flow regulating device includes a slider, the slider is slidably installed in the drainage hole of the water diversion pipe, the end of the slider located on the outside of the water diversion pipe is fixedly installed with an outer sealing plate, the end of the slider located in the water diversion pipe is fixedly installed with an inner sealing plate, a plurality of support tubes are installed at the bottom end of the support block, a plug column is slidably installed on the support tube, a spring is arranged between the plug column and the support block, the plug column passes through and is fixedly installed with a support rod, a cross block is fixedly installed on the bottom end of the support rod, and the cross block is fixedly connected to the adjacent outer sealing plate.

[0012] Preferably, a liquid outlet is provided at the bottom end of the purification tower, and a gas outlet is provided at the top end of the purification tower.

[0013] Preferably, the air intake assembly includes an air intake pipe, the air intake pipe passes through and is installed on the side wall of the purification tower, an air pump is provided on the side wall of the air intake pipe, and a first solenoid valve is provided on the side wall of the air intake pipe.

[0014] Preferably, the support box and the support sleeve are sleeved together, a folding ring is provided on the inner wall of the support sleeve, and the bottom end of the support box is fitted with the folding ring.

[0015] Preferably, the top cover is slidably sleeved with the purification tower, and a plurality of fasteners are provided between the top cover and the supporting sleeve.

[0016] Preferably, the array spacing of the air ducts is the same as the array spacing of the water ducts, and the air ducts and the water ducts are arranged in a staggered distribution.

[0017] Preferably, the outer sealing plate and the inner sealing plate are slidably fitted to the outer wall and the inner wall of the water diversion pipe respectively, and the outer sealing plate and the inner sealing plate are provided with a sealing coating on the sides facing each other, and the sealing coating is made of chloroprene rubber.

[0018] Preferably, a plurality of reinforcing ribs are provided at the top end of the sliding block, and the outer sealing plate and the inner sealing plate are respectively fixedly connected to adjacent reinforcing ribs.

[0019] Preferably, the water inlet assembly comprises a water inlet pipe, one end of which extends into the support box, a water pump is provided at the reserve of the water inlet pipe, and a second solenoid valve is provided on the side wall of the water inlet pipe.

[0020] The beneficial effects of the present invention are:

[0021] 1. By setting an isobaric flow balancing device, the beneficial effect that can be obtained is that the isobaric flow balancing device includes a support sleeve, the support sleeve is fixedly installed on the inner wall of the purification tower, the inner wall of the support sleeve is provided with a rubber layer, the top of the support sleeve is provided with a top cover, the bottom of the top cover is fixedly provided with a support box, a plurality of air ducts distributed in an array are provided between the support box and the support sleeve, a plurality of water ducts distributed in an array are provided through the bottom wall of the support box, a plurality of drainage holes are provided on the side wall of the water duct, and a support block is provided at the top of the water duct;

[0022] In conjunction with the water pump and the second solenoid valve, circulating water enters between the support box and the top cover through the water inlet pipe. The support box and the top cover temporarily store the water flow. The effective area of ​​the drainage holes on multiple water diversion pipes for drainage is the same, which plays a role in evenly distributing the liquid. By setting up multiple water diversion pipes and multiple drainage holes on the side wall of a single water diversion pipe, the uniform distribution effect of the liquid is improved.

[0023] 2. By setting the flow regulating device, the beneficial effect that can be obtained is that the flow regulating device includes a slider, the slider is slidably installed in the drainage hole of the water diversion pipe, the end of the slider located outside the water diversion pipe is fixedly installed with an outer sealing plate, the end of the slider located inside the water diversion pipe is fixedly installed with an inner sealing plate, a plurality of support tubes are installed at the bottom end of the support block, a plug is slidably installed on the support tube, a spring is arranged between the plug and the support block, the plug passes through and is fixedly installed with a support rod, a cross block is fixedly installed at the bottom end of the support rod, and the cross block is fixedly connected to the adjacent outer sealing plate;

[0024] The support box and the top cover temporarily store the water flow. The water pressure drives the plug to slide upward in the support tube. The spring is compressed, and the support rod, cross block, outer sealing plate, slider and inner sealing plate rise synchronously with the plug. The effective area of ​​the drainage hole for drainage increases linearly. The plugs on multiple water diversion pipes are subjected to the same pressure difference and the same rising distance. The effective area of ​​the drainage holes on multiple water diversion pipes for drainage is the same, which plays a role in uniformly distributing the liquid. It has an isobaric and uniform flow conveying structure for the liquid, reducing the possibility of channel flow, bias flow and wall flow.

[0025] 3. By setting the water inlet assembly and the air inlet assembly, the beneficial effect that can be obtained is that the air inlet assembly includes an air inlet pipe, the air inlet pipe penetrates and is installed on the side wall of the purification tower, the side wall of the air inlet pipe is provided with an air pump, the side wall of the air inlet pipe is provided with a first solenoid valve, the water inlet assembly includes a water inlet pipe, one end of the water inlet pipe extends into the support box, the reserve of the water inlet pipe is provided with a water pump, and the side wall of the water inlet pipe is provided with a second solenoid valve;

[0026] In conjunction with the air pump and the first solenoid valve, the biogas enters the purification tower from the air inlet pipe, is distributed under the action of the trough-disc type gas-liquid distributor, and rises along the internal cavity of the purification tower; at the same time, the water flows out of the support box from the drainage hole of the water inlet pipe, and the distributed liquid and the rising gas in the packing layer are fully transferred to make the carbon dioxide fully dissolved in the water. The gas flows out of the purification tower from multiple air inlet pipes and air outlets, and the carbon dioxide dissolved in the water descends with the liquid phase and finally flows out from the liquid outlet, thus forming a pressure-adjustable water supply and gas structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is the installation structure diagram of the packing layer in the present invention;

[0030] Figure 3 It is a structural diagram of the installation of the support sleeve and the support box in the present invention;

[0031] Figure 4 This is a structural diagram of the water diversion pipe of the present invention;

[0032] Figure 5 This is a structural diagram of the installation of the support box and the water diversion pipe in the present invention;

[0033] Figure 6 It is the installation structure diagram of the flow regulating device in the present invention;

[0034] Figure 7 This is a structural diagram of the water diversion pipe of the present invention;

[0035] Figure 8 It is the installation structure diagram of the spring in the present invention;

[0036] Fig. 9 This is a structural diagram of the installation of the slider and the inner sealing plate in the present invention;

[0037] Fig.10 It is a structural diagram of the installation of the air intake assembly in the present invention;

[0038] Fig.11 This is a diagram of the installation structure of the water inlet assembly in the present invention.

[0039] Description of reference numerals:

[0040] In the figure: 1, purification tower; 11, liquid outlet; 12, gas outlet; 13, packing layer; 14, support frame; 2, trough-disc type gas-liquid distributor; 31, support sleeve; 32, top cover; 33, support box; 34, fastener; 35, air duct; 36, water duct; 37, drainage hole; 38, support block; 41, slider; 42, outer sealing plate; 43, inner sealing plate; 44, reinforcing rib; 45, support pipe; 46, plug; 47, spring; 48, support rod; 49, cross block; 51, air inlet pipe; 52, air pump; 53, first solenoid valve; 61, water inlet pipe; 62, water pump; 63, second solenoid valve. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0043] Reference Figure 1-Figure 11 , a purification tower for biogas purification disclosed in the present invention, comprising a purification tower 1, a liquid outlet 11 is arranged at the bottom end of the purification tower 1, a gas outlet 12 is arranged at the top end of the purification tower 1, a packing layer 13 is arranged in the middle of the purification tower 1, and a support frame 14 is arranged at the bottom end of the purification tower 1;

[0044] A trough-disc type gas-liquid distributor 2 is installed on the inner wall of the purification tower 1, and the trough-disc type gas-liquid distributor 2 is located below the packing layer 13. The side wall of the purification tower 1 is provided with an air intake assembly, and the air intake assembly is located below the trough-disc type gas-liquid distributor 2. The air intake assembly includes an air intake pipe 51, and the air intake pipe 51 passes through and is installed on the side wall of the purification tower 1. An air pump 52 is provided on the side wall of the air intake pipe 51, and a first solenoid valve 53 is provided on the side wall of the air intake pipe 51;

[0045] The isobaric flow balancing device includes a support sleeve 31, which is fixedly installed on the inner wall of the purification tower 1. The inner wall of the support sleeve 31 is provided with a rubber layer. A top cover 32 is installed on the top of the support sleeve 31. A support box 33 is fixedly installed on the bottom end of the top cover 32. The support box 33 is sleeved with the support sleeve 31. A folding ring is provided on the inner wall of the support sleeve 31. The bottom end of the support box 33 fits the folding ring. The top cover 32 is slidably sleeved with the purification tower 1. A plurality of fasteners 34 are provided between the top cover 32 and the support sleeve 31. A plurality of array-distributed fasteners 34 are provided between the support box 33 and the support sleeve 31. The air inlet pipe 35 is provided, and a plurality of water inlet pipes 36 distributed in an array are provided through the bottom wall of the support box 33. The array spacing of the air inlet pipe 35 is the same as the array spacing of the water inlet pipe 36. The air inlet pipe 35 and the water inlet pipe 36 are arranged in a staggered distribution. The side wall of the water inlet pipe 36 is provided with a plurality of drainage holes 37. The top of the water inlet pipe 36 is provided with a support block 38. The side wall of the purification tower 1 is provided with a water inlet assembly for conveying liquid to the water inlet pipe 36. The water inlet assembly includes a water inlet pipe 61. One end of the water inlet pipe 61 extends into the support box 33. The reserve of the water inlet pipe 61 is provided with a water pump 62. The side wall of the water inlet pipe 61 is provided with a second solenoid valve 63.

[0046] The flow regulating device is used to adjust the effective drainage area of ​​the drainage hole 37. The flow regulating device includes a slider 41. The slider 41 is slidably installed in the drainage hole 37 of the water diversion pipe 36. An outer sealing plate 42 is fixedly installed at one end of the slider 41 located outside the water diversion pipe 36. An inner sealing plate 43 is fixedly installed at one end of the slider 41 located inside the water diversion pipe 36. The outer sealing plate 42 and the inner sealing plate 43 are respectively slidably attached to the outer wall and the inner wall of the water diversion pipe 36. The outer sealing plate 42 and the inner sealing plate 43 are both provided with a sealing plate on the opposite side. The sealing coating is made of chloroprene rubber, a plurality of reinforcing ribs 44 are arranged on the top of the slider 41, the outer sealing plate 42 and the inner sealing plate 43 are respectively fixedly connected with the adjacent reinforcing ribs 44, a plurality of supporting tubes 45 are installed on the bottom end of the supporting block 38, a plug 46 is slidably installed on the supporting tube 45, a spring 47 is arranged between the plug 46 and the supporting block 38, the plug 46 passes through and is fixedly installed with a supporting rod 48, a cross block 49 is fixedly installed on the bottom end of the supporting rod 48, and the cross block 49 is fixedly connected with the adjacent outer sealing plate 42.

[0047] The working principle and use process of the present invention are as follows: with the air pump 52 and the first solenoid valve 53, the biogas enters the purification tower 1 from the air inlet pipe 51, is distributed under the action of the trough-plate gas-liquid distributor 2, and rises along the internal cavity of the purification tower 1; at the same time, with the water pump 62 and the second solenoid valve 63, the circulating water enters between the support box 33 and the top cover 32 from the water inlet pipe 61, and the support box 33 and the top cover 32 play a temporary storage role for the water flow, and the water pressure drives the plug 46 to slide upward in the support tube 45, the spring 47 is compressed, and the support rod 48, the cross block 49, the outer sealing plate 42, the slider 41 and the inner sealing plate 43 are the same as the plug 46 As the water rises step by step, the effective drainage area of ​​the drainage holes 37 increases linearly, the plugs 46 on the multiple water pipes 36 are subjected to the same pressure difference and the same rising distance, the effective drainage area of ​​the drainage holes 37 on the multiple water pipes 36 is the same, which plays a role in uniformly distributing the liquid, and the water flows out of the support box 33 from the drainage holes 37 of the water pipes 36. The distributed liquid and the rising gas in the packing layer 13 are fully transferred to make the carbon dioxide fully dissolved in the water, and the gas flows out of the purification tower 1 from the multiple air pipes 35 and the air outlet 12. The carbon dioxide dissolved in the water descends with the liquid phase and finally flows out from the liquid outlet 11.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A purification tower for biogas purification, characterized in that: include: A purification tower (1), wherein a packing layer (13) is arranged in the middle of the purification tower (1), and a support frame (14) is arranged at the bottom end of the purification tower (1); A trough-disc type gas-liquid distributor (2), the trough-disc type gas-liquid distributor (2) being installed on the inner wall of the purification tower (1), the trough-disc type gas-liquid distributor (2) being located below the packing layer (13), and an air intake assembly being provided on the side wall of the purification tower (1), the air intake assembly being located below the trough-disc type gas-liquid distributor (2); An isobaric flow balancing device, the isobaric flow balancing device being located above the packing layer (13), the isobaric flow balancing device comprising a support sleeve (31), the support sleeve (31) being fixedly mounted on the inner wall of the purification tower (1), the inner wall of the support sleeve (31) being provided with a rubber layer, a top cover (32) being mounted on the top end of the support sleeve (31), a support box (33) being fixedly mounted on the bottom end of the top cover (32), a plurality of air guide pipes (35) distributed in an array being intersected between the support box (33) and the support sleeve (31), a plurality of water guide pipes (36) distributed in an array being intersected through the bottom wall of the support box (33), a plurality of drainage holes (37) being disposed on the side wall of the water guide pipe (36), a support block (38) being disposed on the top end of the water guide pipe (36), and a water inlet assembly for conveying liquid to the water guide pipe (36) being disposed on the side wall of the purification tower (1); A flow regulating device, the flow regulating device is used to regulate the effective drainage area of ​​the drainage hole (37), the flow regulating device comprises a slider (41), the slider (41) is slidably mounted in the drainage hole (37) of the water diversion pipe (36), an outer sealing plate (42) is fixedly mounted on one end of the slider (41) located outside the water diversion pipe (36), an inner sealing plate (43) is fixedly mounted on one end of the slider (41) located inside the water diversion pipe (36), a plurality of support tubes (45) are mounted at the bottom end of the support block (38), a plug column (46) is slidably mounted on the support tube (45), a spring (47) is provided between the plug column (46) and the support block (38), a support rod (48) is passed through and fixedly mounted on the plug column (46), a cross block (49) is fixedly mounted on the bottom end of the support rod (48), and the cross block (49) is fixedly connected to the adjacent outer sealing plate (42).

2. A biogas purification tower according to claim 1, characterized in that: The bottom end of the purification tower (1) is provided with a liquid outlet (11), and the top end of the purification tower (1) is provided with a gas outlet (12).

3. A biogas purification tower according to claim 1, characterized in that: The air intake assembly comprises an air intake pipe (51), the air intake pipe (51) penetrates through and is installed on the side wall of the purification tower (1), an air pump (52) is provided on the side wall of the air intake pipe (51), and a first solenoid valve (53) is provided on the side wall of the air intake pipe (51).

4. A biogas purification tower according to claim 1, characterized in that: The support box (33) and the support sleeve (31) are sleeved together, the inner wall of the support sleeve (31) is provided with a folded ring, and the bottom end of the support box (33) is in contact with the folded ring.

5. A biogas purification tower according to claim 1, characterized in that: The top cover (32) is slidably sleeved with the purification tower (1), and a plurality of fasteners (34) are provided between the top cover (32) and the supporting sleeve (31).

6. A biogas purification tower according to claim 1, characterized in that: The array spacing of the air ducts (35) is the same as the array spacing of the water ducts (36), and the air ducts (35) and the water ducts (36) are arranged in a staggered distribution.

7. A biogas purification tower according to claim 1, characterized in that: The outer sealing plate (42) and the inner sealing plate (43) are respectively slidably fitted on the outer wall and the inner wall of the water diversion pipe (36); the outer sealing plate (42) and the inner sealing plate (43) are both provided with a sealing coating on the sides facing each other; the sealing coating is made of chloroprene rubber.

8. A biogas purification tower according to claim 1, characterized in that: A plurality of reinforcing ribs (44) are provided at the top end of the sliding block (41), and the outer sealing plate (42) and the inner sealing plate (43) are respectively fixedly connected to adjacent reinforcing ribs (44).

9. A biogas purification tower according to claim 1, characterized in that: The water inlet assembly comprises a water inlet pipe (61), one end of the water inlet pipe (61) extends into the support box (33), a water pump (62) is provided at the reserve of the water inlet pipe (61), and a second solenoid valve (63) is provided on the side wall of the water inlet pipe (61).

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