Industrial wastewater desulfurization device

Abstract

The utility model discloses an industrial wastewater desulfurization device which comprises a fermentation container, a water inlet pipe is arranged on the upper portion of the fermentation container, a drainage pipe is arranged at the bottom of the fermentation container and provided with a drainage control valve, the fermentation container is provided with an air inlet pipe and an exhaust pipe, and the air outlet end of the air inlet pipe extends to the bottom of the fermentation container. The exhaust pipe is connected with the upper part of the fermentation container and is provided with an exhaust control valve; a partition plate is vertically arranged on the inner side of the fermentation container, a communication gap is formed between one side of the partition plate and the inner wall of the fermentation container, and a bacterium cultivation plate is arranged on the upper surface of the partition plate. The application is beneficial to reducing the influence of air on the activity of anaerobic microorganisms.

Description

Technical Field

[0001] The present application relates to the field of wastewater treatment technology, and in particular to an industrial wastewater desulfurization device. Background Art

[0002] Hydrogen sulfide exists in natural and industrial wastewater and in the absorption liquid of gaseous hydrogen sulfide. The wastewater containing sulfide comes from industrial production processes, such as wine fermentation production, aquaculture and slaughter waste treatment. Although hydrogen sulfide has a certain solubility in water, the amount of dissolved gas is limited, and the conversion of hydrogen sulfide into water-soluble sodium sulfide greatly increases the rate and amount of hydrogen sulfide absorbed into the liquid. One way to eliminate sulfides is to oxidize them into new compounds without odor or toxicity.

[0003] The current treatment method for wastewater containing hydrogen sulfide is to collect it in a designated area and then treat it with the "anaerobic + aerobic biochemical" process. Specifically, the mixed wastewater is first placed in an anaerobic tank (non-enclosed), and anaerobic fermentation is performed using anaerobic microorganisms (methanogens, etc.) to hydrolyze macromolecular substances, and then the mixed wastewater is pumped into an aerobic tank for aeration treatment, so that a large amount of oxygen enters to further reduce COD, and finally discharged.

[0004] For example, a Chinese patent with announcement number CN203451284U discloses a device for removing hydrogen sulfide from winery wastewater using air and water media, which is provided with a closed fermentation container, an air intake pipe and an exhaust pipe in the space above the fermentation container, a circulation container, and the exhaust pipe connected to the circulation container; there is water in the circulation container, the outlet of the exhaust pipe is located below the water surface, and the outlet of the gas discharge pipe is located above the water surface. This technical solution breaks the conventional fixed thinking that air cannot be added to anaerobic reactions. Without affecting the normal operation of the anaerobic treatment system, it can remove more than 99% of the hydrogen sulfide produced by sulfate-reducing bacteria during anaerobic methane fermentation, achieving desulfurization during anaerobic fermentation and avoiding subsequent desulfurization treatment of biogas.

[0005] The above technology promotes the removal of hydrogen sulfide by inputting a certain amount of air into the anaerobic fermentation container. However, since hydrogen sulfide gas can be dissolved in water, the air is mainly concentrated in the top space of the anaerobic fermentation container after entering the anaerobic fermentation container, making the removal efficiency of hydrogen sulfide dissolved in water low and needs to be improved. Utility Model Content

[0006] In order to improve the removal efficiency of hydrogen sulfide dissolved in water in the technology of anaerobic fermentation treatment of hydrogen sulfide, the present application provides an industrial wastewater desulfurization device.

[0007] The industrial wastewater desulfurization device provided in this application adopts the following technical solution:

[0008] An industrial wastewater desulfurization device comprises a fermentation container, wherein an inlet pipe is provided at the top of the fermentation container, a drain pipe is provided at the bottom of the fermentation container, the drain pipe is provided with a drain control valve, the fermentation container is provided with an air inlet pipe and an exhaust pipe, the air outlet end of the air inlet pipe extends to the bottom of the fermentation container, the exhaust pipe is connected to the top of the fermentation container, and the exhaust pipe is provided with an exhaust control valve; a partition is vertically arranged on the inner side of the fermentation container, a connecting gap is formed between one side of the partition and the inner wall of the fermentation container, the partition comprises a first partition and a second partition alternately arranged vertically, the connecting gap between the first partition and the inner wall of the fermentation container is a first connecting gap, the connecting gap between the second partition and the inner wall of the fermentation container is a second connecting gap, and the first connecting gap and the second connecting gap are respectively located on opposite sides of the fermentation container; and a bacteria culture plate is provided on the upper surface of the partition.

[0009] By adopting the above technical solution, the sewage containing hydrogen sulfide enters the fermentation container from the water inlet pipe for fermentation. After the air is transported to the bottom of the fermentation container through the air inlet pipe, it floats up in the form of bubbles. In this process, the first partition and the second partition have the function of guiding the floating path of the bubbles. Since the first connecting gap corresponding to the first partition and the second connecting gap corresponding to the second partition are respectively located on two opposite sides of the fermentation container, the bubbles rise as a whole in a serpentine path. During the rising process of the bubbles, they can directly react with the hydrogen sulfide in the water, or promote the escape of hydrogen sulfide, so that the hydrogen sulfide reacts with the air at the top of the fermentation container. On the other hand, anaerobic microorganisms mainly attach and grow on the culture plate, and the culture plate is located on the upper surface of the partition, so that the air is not easy to contact the anaerobic microorganisms, which is conducive to reducing the influence of air on the activity of anaerobic microorganisms.

[0010] Optionally, it also includes a water storage circulation container, wherein one end of the drain pipe away from the fermentation container is connected to the lower part of the water storage circulation container, the drain pipe is provided with a membrane filter, the bottom of the water storage circulation container is provided with an external discharge pipe, and the external discharge pipe is provided with an external discharge control valve; one end of the exhaust pipe away from the fermentation container is connected to the lower part of the water storage circulation container, the exhaust pipe is provided with an air circulation pump, the upper part of the water storage circulation container is provided with a gas exhaust pipe, and the gas exhaust pipe is provided with an exhaust switch valve; the upper part of the water storage circulation container and the upper part of the fermentation container are connected with an air connecting pipe.

[0011] By adopting the above technical solution, the treated water in the fermentation container can be discharged into the water storage circulation container through the drain pipe, and the water in the water storage circulation container can be discharged through the external discharge pipe. In the above process, the sewage is filtered by the membrane filter, so that the microorganisms remain in the fermentation container. The air circulation pump can pump the air at the top of the fermentation container into the water storage circulation container through the exhaust pipe, and then return it to the fermentation container from the air connecting pipe, thereby generating air circulation. When water is retained in the water storage circulation container and the water level is higher than the air inlet end of the exhaust pipe, the circulating air pump passes through the medium water during the process of pumping gas into the water storage circulation container, which is conducive to promoting the reaction of hydrogen sulfide.

[0012] Optionally, one end of the drain pipe close to the fermentation container is connected to a sewage pipe, the sewage pipe is provided with a sewage control valve, and the connection portion between the sewage pipe and the drain pipe is lower than the bottom wall of the fermentation container.

[0013] By adopting the above technical solution, the sewage pipe can be used to discharge the sediment in the fermentation container. The sewage pipe is lower than the bottom wall of the fermentation container, which is conducive to draining the sediment in the fermentation container as much as possible.

[0014] Optionally, an aeration head is provided at the air outlet end of the air inlet pipe.

[0015] By adopting the above technical solution, the aeration head can disperse the air into smaller bubbles, making it easier for the culture plate to trap the bubbles, increasing the amount of air in the water, and increasing the interface between air and water, so that the air and hydrogen sulfide in the water can be more fully contacted.

[0016] Optionally, each of the partitions is commonly connected to a series rod, and the partition can be detachably installed on the inner side of the fermentation container.

[0017] By adopting the above technical solution, each partition is connected into a whole through the serial rod, which is convenient for disassembly and assembly of the partition, and makes the bacteria culture plate on the partition easier to replace and clean.

[0018] Optionally, the connecting rod is a hollow tube structure, the lower end of the connecting rod is lower than the lowest partition, the air intake pipe passes through the connecting rod from top to bottom, and an annular sealing plug is provided between the outer circumference of the air intake pipe and the inner circumference of the connecting rod.

[0019] By adopting the above technical solution, the air inlet pipe passes from the serial rod to the bottom of the fermentation container, so that the air outlet end of the air inlet pipe can pass through the obstruction of the partition in a more convenient way to reach the bottom of the fermentation container. The annular sealing plug can prevent air from entering the gap between the serial rod and the air inlet pipe, so that the air bubbles output by the air inlet pipe rise along a serpentine path as much as possible.

[0020] Optionally, the inner wall of the fermentation container is provided with a limiting structure, and the limiting structure is used to support the partition at the lowest point.

[0021] By adopting the above technical solution, the limiting structure can support the lowest partition, so that a space capable of accommodating the aeration head is formed between the lowest partition and the bottom of the fermentation container, thereby reducing the situation where the partition squeezes the aeration head under the action of gravity.

[0022] Optionally, the partition is arranged at an angle, and the connecting gap is located on the high side of the partition.

[0023] By adopting the above technical solution, the communication gap between the partition and the inner wall of the fermentation container is set on the high side of the partition, so that the path of air bubbles moving to the communication gap follows the inclination direction of the partition.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. After the air is transported to the bottom of the fermentation container through the air inlet pipe, it floats up in the form of bubbles. The bubbles rise in a serpentine path. During the rising process, the bubbles can directly react with hydrogen sulfide in the water, or promote the escape of hydrogen sulfide, so that hydrogen sulfide reacts with the air at the top of the fermentation container. Anaerobic microorganisms mainly attach and grow on the culture plate, and the culture plate is located on the upper surface of the partition, making it difficult for air to contact anaerobic microorganisms, which is conducive to reducing the impact of air on the activity of anaerobic microorganisms.

[0026] 2. The air inlet pipe passes from the connecting rod to the bottom of the fermentation container, so that the air outlet of the air inlet pipe can pass through the barrier of the partition in a more convenient way to reach the bottom of the fermentation container. The annular sealing plug can prevent air from entering the gap between the connecting rod and the air inlet pipe, so that the air bubbles output by the air inlet pipe rise along the serpentine path as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0028] Figure 2 It is a schematic structural diagram of the fermentation tank of this embodiment.

[0029] Description of reference numerals:

[0030] 1. Fermentation container; 11. Limiting structure; 2. Water storage circulation container; 3. Water inlet pipe; 4. Drain pipe; 41. Membrane filter; 42. Drain control valve; 5. External discharge pipe; 51. External discharge control valve; 6. Air inlet pipe; 61. Aeration head; 7. Exhaust pipe; 71. Exhaust control valve; 72. Air circulation pump; 8. Gas discharge pipe; 81. Exhaust switch valve; 82. Flow meter; 9. Air connecting pipe; 10. Drain pipe; 101. Drain control valve; 20. Partition; 201. First partition; 202. Second partition; 30. Connecting gap; 301. First connecting gap; 302. Second connecting gap; 40. Culture plate; 50. Series rod; 501. Ring sealing plug. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-2 This application is described in further detail.

[0032] The present application discloses an industrial wastewater desulfurization device. Figure 1 The industrial wastewater desulfurization device includes a fermentation container 1 and a water storage circulation container 2. The fermentation container 1 and the water storage circulation container 2 are both closed tanks with detachable tops. A water inlet pipe 3 is provided at the top of the fermentation container 1, and a drain pipe 4 is provided at the bottom of the fermentation container 1. One end of the drain pipe 4 away from the fermentation container 1 is connected to the lower part of the water storage circulation container 2. The drain pipe 4 is provided with a membrane filter 41, and the drain pipe 4 is provided with a drain control valve 42; an external discharge pipe 5 is provided at the bottom of the water storage circulation container 2, and the external discharge pipe 5 is provided with an external discharge control valve 51.

[0033] The fermentation container 1 is provided with an air inlet pipe 6 and an exhaust pipe 7, one end of the exhaust pipe 7 is connected to the upper part of the fermentation container 1, and the other end of the exhaust pipe 7 is connected to the lower part of the water storage circulation container 2, and the exhaust pipe 7 is provided with an exhaust control valve 71 and an air circulation pump 72; the upper part of the water storage circulation container 2 is provided with a gas exhaust pipe 8, the gas exhaust pipe 8 is provided with an exhaust switch valve 81 and a flow meter 82, and the flow meter 82 is used to measure the amount of methane generated; the upper part of the water storage circulation container 2 and the upper part of the fermentation container 1 are connected with an air connecting pipe 9.

[0034] When treating wastewater containing hydrogen sulfide, the sewage is discharged into the fermentation container 1 through the water inlet pipe 3, and a space margin is left at the top of the fermentation container 1; the water in the fermentation container 1 enters the water storage circulation container 2 through the open drainage control valve 42 and the membrane filter 41, the water level in the water storage circulation container 2 is higher than the outlet end of the exhaust pipe 7, and a space margin is left at the top of the water storage circulation container 2, and then the drainage control valve 42 is closed; then air is input into the fermentation container 1 through the air inlet pipe 6, and then the air circulation pump 72 is used to pump the gas at the top of the fermentation container 1 into the water storage circulation container 2, and then the gas flows back from the water storage circulation container 2 to the fermentation container 1 through the air connecting pipe 9, so that the gas circulates between the fermentation container 1 and the water storage circulation container 2 to promote the reaction between the hydrogen sulfide in the biogas and the oxygen in the air.

[0035] After the wastewater fermentation treatment is completed, the external discharge control valve 51 is opened, and the treated water in the fermentation container 1 is indirectly discharged through the external discharge pipe 5, and part of the water filtered by the membrane filter 41 is retained in the water storage circulation container 2.

[0036] Reference Figure 1 The end of the drain pipe 4 close to the fermentation container 1 is connected to a sewage pipe 10, which is closer to the fermentation container 1 than the membrane filter 41. The sewage pipe 10 is provided with a sewage control valve 101, and the connection between the sewage pipe 10 and the drain pipe 4 is lower than the bottom wall of the fermentation container 1. The precipitated sulfur and other precipitates formed by the reaction in the fermentation container 1 can be discharged through the sewage pipe 10.

[0037] Reference Figure 1 and Figure 2 A partition 20 is vertically arranged inside the fermentation container 1, and a communication gap 30 is formed between one side of the partition 20 and the inner wall of the fermentation container 1. The partition 20 is tilted, and the communication gap 30 is located on the high side of the partition 20. The partition 20 includes a first partition 201 and a second partition 202 arranged alternately along the vertical direction, the communication gap 30 between the first partition 201 and the inner wall of the fermentation container 1 is the first communication gap 301, and the communication gap 30 between the second partition 202 and the inner wall of the fermentation container 1 is the second communication gap 302. The first communication gap 301 and the second communication gap 302 are respectively located on opposite sides of the fermentation container 1; a culture plate 40 is provided on the upper surface of the partition 20, and the culture plate 40 is made of a material with loose gaps, such as biochemical cotton, porous ceramics, etc.

[0038] Each partition 20 is connected to a series rod 50, which is a hollow tube structure. The partition 20 can be detachably installed on the inner side of the fermentation container 1. The inner wall of the fermentation container 1 is provided with a plurality of limiting structures 11, which are used to jointly support the partition 20 located at the lowest position. The lower end of the series rod 50 is lower than the lowest partition 20. The air inlet pipe 6 passes through the series rod 50 from top to bottom and extends to the bottom of the fermentation container 1. The air outlet end of the air inlet pipe 6 is provided with an aeration head 61. An annular sealing plug 501 is provided between the outer circumference of the air inlet pipe 6 and the inner circumference of the series rod 50. The annular sealing plug 501 can prevent bubbles from moving straight upward directly through the inner cavity of the series rod 50.

[0039] The wastewater containing hydrogen sulfide enters the fermentation container 1 from the water inlet pipe 3 for fermentation. After the air is transported to the bottom of the fermentation container 1 through the air inlet pipe 6 and the aeration head 61, it floats up in the form of bubbles. In this process, the first partition 201 and the second partition 202 have the function of guiding the bubble floating path. Since the first connecting gap 301 corresponding to the first partition 201 and the second connecting gap 302 corresponding to the second partition 202 are respectively located on two opposite sides of the fermentation container 1, the bubbles rise as a whole in a serpentine path. During the rising process of the bubbles, they can directly react with the hydrogen sulfide in the water, or promote the escape of hydrogen sulfide, so that the hydrogen sulfide reacts with the air at the top of the fermentation container 1. On the other hand, the anaerobic microorganisms mainly attach and grow on the bacterial culture plate 40, and the bacterial culture plate 40 is located on the upper surface of the partition 20, so that the air is not easy to contact the anaerobic microorganisms, which is conducive to reducing the influence of air on the activity of anaerobic microorganisms.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An industrial wastewater desulfurization device, characterized in that: The fermentation container (1) comprises a fermentation container (1), wherein a water inlet pipe (3) is provided at the top of the fermentation container (1), a drainage pipe (4) is provided at the bottom of the fermentation container (1), and the drainage pipe (4) is provided with a drainage control valve (42); the fermentation container (1) is provided with an air inlet pipe (6) and an exhaust pipe (7), wherein the air outlet end of the air inlet pipe (6) extends to the bottom of the fermentation container (1), the exhaust pipe (7) is connected to the top of the fermentation container (1), and the exhaust pipe (7) is provided with an exhaust control valve (71); a partition (20) is vertically provided on the inner side of the fermentation container (1), and one side of the partition (20) is in contact with the inner wall of the fermentation container (1). A connecting gap (30) is formed between the first and second partitions (201 and 202) arranged alternately in the vertical direction; the connecting gap (30) between the first partition (201) and the inner wall of the fermentation container (1) is the first connecting gap (301); the connecting gap (30) between the second partition (202) and the inner wall of the fermentation container (1) is the second connecting gap (302); the first connecting gap (301) and the second connecting gap (302) are respectively located on opposite sides of the fermentation container (1); and a bacteria culture plate (40) is provided on the upper surface of the partition (20).

2. An industrial wastewater desulfurization device according to claim 1, characterized in that: It also comprises a water storage circulation container (2), wherein one end of the drainage pipe (4) away from the fermentation container (1) is connected to the lower part of the water storage circulation container (2), the drainage pipe (4) is provided with a membrane filter (41), the bottom of the water storage circulation container (2) is provided with an external discharge pipe (5), and the external discharge pipe (5) is provided with an external discharge control valve (51); one end of the exhaust pipe (7) away from the fermentation container (1) is connected to the lower part of the water storage circulation container (2), the exhaust pipe (7) is provided with an air circulation pump (72), the upper part of the water storage circulation container (2) is provided with a gas exhaust pipe (8), and the gas exhaust pipe (8) is provided with an exhaust switch valve (81); the upper part of the water storage circulation container (2) and the upper part of the fermentation container (1) are connected by an air communication pipe (9).

3. An industrial wastewater desulfurization device according to claim 2, characterized in that: One end of the drainage pipe (4) close to the fermentation container (1) is connected to a sewage pipe (10), the sewage pipe (10) is provided with a sewage control valve (101), and the connection portion between the sewage pipe (10) and the drainage pipe (4) is lower than the bottom wall of the fermentation container (1).

4. The industrial wastewater desulfurization device according to claim 1, characterized in that: An aeration head (61) is provided at the air outlet end of the air inlet pipe (6).

5. The industrial wastewater desulfurization device according to claim 1, characterized in that: Each of the partitions (20) is commonly connected to a serial rod (50), and the partitions (20) are detachably mounted on the inner side of the fermentation container (1).

6. An industrial wastewater desulfurization device according to claim 5, characterized in that: The connecting rod (50) is a hollow tube structure. The lower end of the connecting rod (50) is lower than the lowermost partition (20). The air intake pipe (6) passes through the connecting rod (50) from top to bottom. An annular sealing plug (501) is provided between the outer peripheral surface of the air intake pipe (6) and the inner peripheral surface of the connecting rod (50).

7. An industrial wastewater desulfurization device according to claim 6, characterized in that: The inner wall of the fermentation container (1) is provided with a limiting structure (11), and the limiting structure (11) is used to support the partition (20) at the lowest point.

8. An industrial wastewater desulfurization device according to claim 1, characterized in that: The partition plate (20) is arranged at an angle, and the connecting gap (30) is located on the high side of the partition plate (20).

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