Alkali liquor circulating desulfurization biological reaction tower

Abstract

The utility model relates to the technical field of biogas treatment, and particularly discloses an alkali liquor circulating desulfurization biological reaction tower. The device comprises a PLC control system and a tower body, a spraying system is arranged in the tower body and comprises a cylinder installed on a stirring shaft in a pivoted mode, the lower end of the cylinder is connected with a hollow disc in a pivoted mode, the hollow disc is fixedly connected with the stirring shaft, and the hollow disc is connected with an annular pipe and an inner ring pipe through connecting pipes. The annular pipe, the connecting pipe, the inner ring pipe and the hollow disc are all provided with a plurality of liquid spraying openings. According to the utility model, the rotating annular pipe, the connecting pipe, the inner annular pipe and the hollow turntable are respectively provided with the liquid spraying ports facing different directions, and desulfurizer liquid separated from the liquid spraying ports intersects and rotates, so that the covering is tight, the gas-liquid contact effect is enhanced, and the removal effect of hydrogen sulfide is improved. And the operation cost is reduced through cyclic utilization of the vulcanizing agent solution. The device is simple in structure, convenient to operate, easy to maintain and suitable for biogas treatment projects of various scales.

Description

Technical Field

[0001] This utility model relates to the field of biogas treatment technology, and in particular to an alkaline solution circulating desulfurization bioreactor. Background Technology

[0002] As a renewable resource, the removal of hydrogen sulfide is a crucial step in the utilization of biogas. Existing biogas desulfurization technologies mainly include wet desulfurization and dry desulfurization, with wet desulfurization being widely used due to its high efficiency and ease of operation. However, in traditional wet desulfurization units, the desulfurizing agent solution directly enters the circulation tank for recirculation, resulting in inconsistent alkalinity of the circulating solution. Simultaneously, the spray layer sprays directly from top to bottom, creating blind spots and short gas-liquid contact time. Therefore, problems such as uneven desulfurizing agent distribution, insufficient gas-liquid contact, and low desulfurization efficiency exist. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides an alkaline circulating desulfurization bioreactor tower with uniform desulfurizing agent distribution and low desulfurization efficiency.

[0004] This utility model is achieved through the following technical solution:

[0005] An alkaline circulating desulfurization bioreactor includes a PLC control system and a tower body. The tower body contains a spray system and a circulation zone. The tower body has a stirring device extending into the circulation zone. The spray system includes several cylinders rotatably connected to the stirring shaft of the stirring device. Each cylinder is rotatably connected to a hollow disc, which is fixedly connected to the stirring shaft. Several connecting pipes are arranged circumferentially around the hollow discs, and the outer ends of the connecting pipes are connected to an annular pipe. The annular pipe contacts the inner wall of the tower body. The circulation zone has a circulation pipe, the upper end of which extends into the tower body and is fixedly connected to a cylinder. The annular pipe has downward and side-down spray nozzles facing the stirring shaft. The connecting pipes have downward and obliquely downward spray nozzles. The hollow disc has a downward spray nozzle. The system also includes a desulfurizing agent addition tank, which is connected to the circulation zone via a pipe equipped with a solenoid valve. A pH meter is installed in the circulation zone. The pH meter and the solenoid valve are electrically connected to the PLC control system.

[0006] The inner wall of the tower body is provided with an annular groove, and the annular pipe is located inside the annular groove.

[0007] The cross-section of the annular groove is an arc shape that matches the annular tube.

[0008] A circulation pump is installed on the circulation pipe.

[0009] The connecting pipes are connected together through an inner ring pipe, and the inner ring pipe is provided with the same spray nozzle as the connecting pipe.

[0010] The utility model discloses the beneficial effect is:

[0011] The utility model discloses a rotating annular pipe, connecting pipe, inner ring pipe and hollow turntable are set up respectively to different liquid injection port, these liquid injection port divide out the desulfurizer liquid cross and add the effect of rotation, cover tightly, strengthen the gas-liquid contact effect, improve the removal effect of hydrogen sulfide.

[0012] The recycling of the vulcanizing agent solution reduces the operation cost.

[0013] The utility model discloses simple structure, convenient operation, easy maintenance is applicable to various scale's marsh gas treatment project. DRAWINGS

[0014] The utility model makes further detailed description from the following combined with the drawings:

[0015] Figure 1 It is the main view structural schematic drawing of the utility model;

[0016] Figure 2 It is the cross section structural schematic drawing of the utility model;

[0017] Figure 3 It is Figure 2 The enlarged structural schematic drawing of B place;

[0018] Figure 4 It is Figure 2 The cross section structural schematic drawing of A-A direction;

[0019] Figure 5 It is Figure 3 The cross section structural schematic drawing of C-C direction.

[0020] In the drawing, 1 tower body, 2 circulation area, 3 stirring shaft, 4 cylinder, 5 hollow disc, 6 connecting pipe, 7 annular pipe, 8 annular groove, 9 inner ring pipe, 10 liquid injection port, 11 circulating pipe, 12 circulating pump, 13 pH value tester, 14 desulfurizer adding pool, 15 pipeline, 16 electromagnetic valve, 17 biogas import, 18 biogas export, 19 motor, 20 demisting system. DETAILED DESCRIPTION

[0021] The drawings are the specific embodiment of the utility model.

[0022] In order to can more clearly understand the above -mentioned purpose, feature and advantage of the utility model, the utility model is further detailed below with the drawings and specific embodiment, it is to explain that, in the non-conflict situation, the embodiment of the present application and the feature in the embodiment can be combined mutually.

[0023] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be described in detail herein, and the present application is not limited to the specific embodiments described herein.

[0024] As shown in the figure, the lye circulating desulfurization biological reaction tower comprises a PLC control system and a tower body 1, and the whole device is controlled to run by the PLC. Figures 1 to 5

[0025] A stirring device, a spraying system and a circulating area 2 are arranged in the tower body 1, and a biogas inlet 17 and a biogas outlet 18 are arranged on the tower body 1; the stirring device comprises a stirring shaft 3, and the stirring shaft 3 is driven to rotate by a motor 19.

[0026] The spraying system comprises: a plurality of cylinders 4 are arranged on the stirring shaft 3, the cylinders 4 are connected to the stirring shaft 3 in a shaft rotation mode, preferably in a sealed connection mode, and the lower end of the cylinder 4 is connected to a hollow disc 5 in a shaft rotation mode, preferably in a sealed connection mode; the hollow disc 5 is fixedly connected to the stirring shaft 3 or is connected to the stirring shaft 3 in a key connection mode, a plurality of connecting pipes 6 are connected to the hollow disc 5 in a radial mode, the outer end of the connecting pipe 6 is connected to a ring-shaped pipe 7, the ring-shaped pipe 7 is tightly attached to the inner wall of the tower body 1 and can rotate, preferably a ring-shaped groove 8 is formed in the tower body 1 or is arranged in the tower body 1, and the cross section of the ring-shaped groove 8 is matched with the curvature of the ring-shaped pipe 7.

[0027] The lower end of the cylinder 4 is open and is communicated with the hollow disc 5.

[0028] An inner ring pipe 9 is further arranged on the inner side of the ring-shaped pipe 7, and the inner ring pipe 9 is communicated with the connecting pipe 6.

[0029] The hollow disc 5, the ring-shaped pipe 7, the connecting pipe 6 and the inner ring pipe 9 are communicated and are provided with liquid spraying ports 10 which spray downward.

[0030] The inner lower side of the ring-shaped pipe 7 is also provided with the liquid spraying port 10.

[0031] The liquid spraying ports 10 are also arranged on the two sides of the inner ring pipe 9 and the connecting pipe 6, and the three liquid spraying ports 10 spray desulfurizing agent liquid in three directions.

[0032] The liquid spraying ports 10 on the sides can not be arranged on a straight line, that is, the angle between the radius of the liquid spraying ports 10 on the sides and the up-down direction can not be the same.

[0033] A circulating pipe 11 is arranged on the tower body 1 at the circulating area 2, a circulating pump 12 is arranged on the circulating pipe 11, and the upper end of the circulating pipe 11 is bifurcated and respectively extends into the tower body 1 and is fixedly connected to the cylinder 4.

[0034] A pH value tester 13 is arranged in the circulating area 2, and the pH value tester 13 is electrically connected to the PLC control system.​

[0035] There is also a desulfurizer adding tank 14 which can be placed beside the tower body 1 but its position is higher than the circulating area 2, the desulfurizer adding tank 14 is connected with a pipeline 15, the pipeline 15 is provided with an electromagnetic valve 16, and the pipeline 15 is connected into the circulating area 2.

[0036] The electromagnetic valve 16 is electrically connected with the LC control system.

[0037] The working process is as follows:

[0038] The PLC control system is started, the biogas enters from the biogas inlet 17 and rises in the tower body 1, meets the desulfurizer liquid sprayed by the spraying system, the spraying system rotates with the rotation of the stirring shaft 3 at the same time of self-spraying, the spiral-shaped liquid is sprayed out from the liquid spraying port 10 and forms the cross full coverage without dead angle, and the biogas is fully contacted, the desulfurized biogas rises and removes the liquid drops in the mist removing system 20, and then is discharged from the biogas outlet 18; the desulfurizer flowing down enters the circulating area 2 and is fully mixed under the stirring of the stirring device, and then enters the hollow disc 5 through the circulating pipe 11 and the cylinder 4 to be recycled and desulfurized.

[0039] If the pH value tester 13 detects that the pH value of the desulfurizer solution in the circulating area 2 is lower than the limited value, the electromagnetic valve 16 is opened, the desulfurizer is added into the circulating area 2 and is stirred and mixed until the pH value reaches the set high point, and then the electromagnetic valve 16 is closed.

[0040] In the utility model, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0041] In the description of the utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or implied that the indicated device or unit must have a specific direction, a specific orientation and operation, therefore, it cannot be understood as a limitation on the utility model.

[0042] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0044] In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art.

Claims

1. A lye circulating desulfurization biological reaction tower, comprising a PLC control system and a tower body (1), wherein a spraying system and a circulating area (2) are arranged in the tower body (1), characterized in that, The tower body (1) is provided with a stirring device extending into the circulating zone (2), the spraying system comprises a plurality of cylinders (4) connected with the stirring shaft (3) of the stirring device in rotation, each cylinder (4) is connected with a hollow disc (5) in rotation, the hollow disc (5) is fixedly connected with the stirring shaft (3), the hollow disc (5) is circumferentially provided with a plurality of connecting pipes (6), the outer end of the connecting pipe (6) is connected with an annular pipe (7), the annular pipe (7) is in contact with the inner wall of the tower body (1), the circulating zone (2) is provided with a circulating pipe (11), the upper end of the circulating pipe (11) extends into the tower body (1) and is fixedly connected with the cylinder (4), the annular pipe (7) is provided with a liquid spraying port (10) downward and laterally downward and towards the stirring shaft (3), the connecting pipe (6) is provided with a liquid spraying port (10) downward and obliquely downward, the hollow disc (5) is provided with a liquid spraying port (10) downward; further comprising a desulfurizer adding tank (14), the desulfurizer adding tank (14) is communicated with the circulating zone (2) through a pipeline (15), the pipeline (15) is provided with a solenoid valve (16); the circulating zone (2) is provided with a pH tester (13), the pH tester (13) and the solenoid valve (16) are respectively electrically connected with a PLC control system.

2. The alkaline circulating desulfurization biological reaction tower according to claim 1, characterized in that, The inner wall of the tower body (1) is provided with an annular groove (8), and the annular pipe (7) is located in the annular groove (8).

3. The alkaline circulating desulfurization biological reaction tower according to claim 2, characterized in that, The cross section of the annular groove (8) is arc-shaped, which is consistent with the annular pipe (7).

4. The alkaline circulating desulfurization biological reaction tower according to claim 1, characterized in that, The circulating pipe (11) is provided with a circulating pump (12).

5. The alkaline circulating desulfurization biological reaction tower according to claim 1, characterized in that, The connecting pipes (6) are connected together through an inner ring pipe (9), and the inner ring pipe (9) is provided with the same liquid spraying port (10) as the connecting pipe (6). The connecting pipes (6) are connected together through an inner ring pipe (9), and the inner ring pipe (9) is provided with the same liquid spraying port (10) as the connecting pipe (6).

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