A sulfur-containing waste alkaline solution treatment device

Abstract

This utility model discloses a sulfur-containing waste alkaline solution treatment device, including a base, a central controller, a collection tank, a tank body, and a heterotrophic denitrification tank. Inside the tank body, from bottom to top, a water distributor, a support plate, and a water collector are fixedly connected. A sewage pipe is fixedly connected to one side of the tank body, with one end extending into the water distributor and the other end fixedly connected to the outlet of a fourth metering pump. This utility model, by setting up a water distributor, a support plate, sulfur autotrophic denitrification biological packing material, and a sewage pipe, allows two streams of wastewater to mix in the water distributor and then evenly pass upwards through the sulfur autotrophic denitrification biological packing material filled on the support plate. Under anaerobic conditions, these microorganisms use sulfur ions in the waste alkaline solution as electron donors to reduce nitrate ions in the wastewater to nitrogen gas. Simultaneously, sulfur ions are oxidized to stable sulfate ions. This process takes place at room temperature, achieving simultaneous removal of sulfur and nitrogen.

Description

Technical Field

[0001] This utility model relates to the field of sulfur-containing waste alkaline solution treatment technology, and in particular to a sulfur-containing waste alkaline solution treatment device. Background Technology

[0002] Each regeneration of the hydrogen sulfide adsorption unit causes a decrease in the sodium hydroxide concentration in the alkaline washing tower. Therefore, the alkaline solution in the alkaline washing tower needs to be replaced and rebalanced before each regeneration. The replaced alkaline solution is rich in components such as sodium sulfide and sodium hydrosulfide. This part of the alkaline solution is collectively referred to as sulfur-containing waste alkaline solution. In order to meet environmental protection requirements, the sulfur-containing waste alkaline solution generated in the propane dehydrogenation process needs to be treated.

[0003] However, in the current technology, wet air oxidation is used to treat high-alkalinity sulfur-containing wastewater, but this method has problems such as equipment corrosion, high energy consumption and high operating costs. Therefore, a sulfur-containing waste alkaline solution treatment device is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sulfur-containing waste alkaline solution treatment device.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a sulfur-containing waste alkaline solution treatment device, comprising a base, a central controller, a collection tank, a tank body, and a heterotrophic denitrification tank. Inside the tank body, from bottom to top, a water distributor, a support plate, and a water collector are fixedly connected in sequence. A sewage pipe is fixedly connected to one side of the tank body, one end of which extends into the water distributor, and the other end is fixedly connected to the outlet of a fourth metering pump. The fourth metering pump is located in the collection tank for tap water and sewage. Multiple holes are provided on the upper surface of the support plate. Sulfur autotrophic denitrification biological packing is filled between the support plate and the water collector. A guide pipe is fixedly connected to the inner bottom of the water collector. The bottom extends to the bottom of the water collector. A gas collection hood is fixedly connected to the upper surface of the heterotrophic denitrification tank. A gas delivery pump is fixedly connected to the upper surface of the gas collection hood. The gas delivery pump is electrically connected to the central controller. A gas delivery pipe is fixedly connected to the gas outlet of the gas delivery pump. One end of the gas delivery pipe passes through one side of the tank and is fixedly connected. The other end of the gas delivery pipe is located between the water distributor and the support plate. The gas collection hood collects these carbon dioxide-rich gases and sends them back to the water distributor area at the bottom of the tank through the gas delivery pump and gas delivery pipe. After the carbon dioxide dissolves in water, it provides the necessary inorganic carbon source for the autotrophic denitrifying bacteria in the tank, realizing the recycling of carbon in the system and directly reducing carbon emissions.

[0006] A support ring is fixedly connected to the outer wall of the tank. A plurality of first support columns are fixedly connected to the bottom of the support ring. The bottom of each first support column is fixedly connected to the upper surface of the base. An exhaust pipe is fixedly connected to the upper surface of the tank. A one-way valve is installed on the exhaust pipe. A small amount of waste gas such as nitrogen generated during the reaction is discharged through the exhaust pipe at the top.

[0007] A first metering pump is fixedly installed on one side of the tank. The first metering pump is electrically connected to the central controller. The inlet of the first metering pump extends to the inside of the water collector. The outlet of the first metering pump is fixedly connected to a first outlet pipe. One end of the first outlet pipe extends to one side of the heterotrophic denitrification tank and is fixedly connected. The treated water flows into the water collector through the top of the guide pipe and is then transported to the heterotrophic denitrification tank via the first metering pump and the first outlet pipe.

[0008] A second metering pump is fixedly connected to the other side of the heterotrophic denitrification tank. The second metering pump is electrically connected to the central controller. The outlet of the second metering pump extends to the inside of the heterotrophic denitrification tank, and a makeup pipe is fixedly connected to the inlet. An overflow plate is fixedly connected inside the heterotrophic denitrification tank. The left side of the overflow plate is a stirring chamber, and the right side is a sedimentation chamber. A baffle plate is fixedly connected to the upper surface of the sedimentation chamber. A sludge return pump is fixedly connected to one side of the sedimentation chamber of the overflow plate. The sludge return pump is electrically connected to the central controller. A stirring device is installed in the stirring chamber and is electrically connected to the central controller. A drain pipe is fixedly connected to one side of the heterotrophic denitrification tank. The wastewater entering the stirring chamber of the heterotrophic denitrification tank may still contain some nitrates. The second metering pump adds a carbon source as needed. The activated sludge flocs settle in the sedimentation chamber. The supernatant is further clarified after passing through the baffle plate and is discharged through the drain pipe to enter the subsequent treatment unit.

[0009] The bottom of the heterotrophic denitrification tank is fixedly connected to multiple second support columns. The bottom of each second support column is fixedly connected to the upper surface of the base. The stability of the heterotrophic denitrification tank is improved by the support of the second support columns.

[0010] A filter is fixedly connected to one side of the outlet of the collection tank, and a water supply pipe is fixedly connected to one side of the filter. A mounting base is fixedly connected to the upper surface of the base, and a third metering pump is fixedly connected to the upper surface of the mounting base. The third metering pump is electrically connected to the central controller. The inlet of the third metering pump is fixedly connected to one end of the water supply pipe, and a second outlet pipe is fixedly connected to the outlet. The second outlet pipe passes through the bottom of the tank and is fixedly connected to the bottom of the water distributor. After the wastewater is filtered to remove solid impurities, it is precisely pressurized by the third metering pump and transported to the water distributor at the bottom of the tank through the second outlet pipe.

[0011] A pH meter and a sulfide concentration analyzer are fixedly installed on one side of the inside of the collection tank. Both the pH meter and the sulfide concentration analyzer are electrically connected to the central controller. The sulfur-containing waste alkaline liquid generated by the propane dehydrogenation unit is first discharged into the collection tank. The pH meter and the sulfide concentration analyzer in the tank monitor the water quality in real time and transmit the data to the central controller.

[0012] This utility model has the following beneficial effects: 1. By setting up a water distributor, support plate, sulfur autotrophic denitrification biological packing, and sewage pipe, the wastewater is filtered to remove solid impurities and then precisely pressurized by the third metering pump. It is then transported to the water distributor at the bottom of the tank through the second outlet pipe. At the same time, nitrified liquid containing nitrates from the sewage treatment plant is also transported to the water distributor through the fourth metering pump and sewage pipe. After the two wastewater streams are mixed in the water distributor, they are evenly passed upward through the sulfur autotrophic denitrification biological packing filled on the support plate. Under anaerobic conditions, these microorganisms use sulfur ions in the waste alkaline solution as electron donors to reduce nitrate ions in the wastewater to nitrogen gas. At the same time, sulfur ions are oxidized to stable sulfate ions. This process is carried out at room temperature, achieving the simultaneous removal of sulfur and nitrogen.

[0013] 2. By setting up a gas collection hood, gas delivery pump, and gas delivery pipe, under the action of the stirring device, heterotrophic denitrifying bacteria use carbon source to completely reduce nitrate ions to nitrogen gas. This process will generate a large amount of carbon dioxide. The gas collection hood collects this carbon dioxide-rich gas and sends it back to the water distributor area at the bottom of the tank through the gas delivery pump and gas delivery pipe. After the carbon dioxide dissolves in water, it provides the necessary inorganic carbon source for the autotrophic denitrifying bacteria in the tank, realizing the recycling of carbon in the system and directly reducing carbon emissions. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the water collector of this utility model; Figure 5 This is a schematic diagram of the water distributor of this utility model.

[0015] Legend: 1. Base; 2. Central controller; 3. Collection tank; 4. Tank body; 5. Heterotrophic denitrification tank; 6. Gas collection hood; 7. Gas transfer pump; 8. Gas supply pipe; 9. Second metering pump; 10. Second support column; 11. Drainage pipe; 12. Overflow plate; 13. Baffle plate; 14. Stirring device; 15. Sludge return pump; 16. Water distributor; 17. Support plate; 18. Sulfate autotrophic denitrification biological packing; 19. Water collector; 20. Guide pipe; 21. First metering pump; 22. First outlet pipe; 23. Support ring; 24. First support column; 25. Filter; 26. Water supply pipe; 27. Third metering pump; 28. Mounting base; 29. ​​Second outlet pipe; 30. pH meter; 31. Sulfide concentration analyzer; 32. Exhaust pipe; 33. One-way valve; 34. Sewage pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1 to 5This sulfur-containing waste alkaline solution treatment device includes a base 1, a central controller 2, a collection tank 3, a tank body 4, and a heterotrophic denitrification tank 5. A filter 25 is fixedly connected to one side of the outlet of the collection tank 3, and a water supply pipe 26 is fixedly connected to one side of the filter 25. A pH meter 30 and a sulfide concentration analyzer 31 are fixedly installed inside the collection tank 3. Both the pH meter 30 and the sulfide concentration analyzer 31 are electrically connected to the central controller 2. A support ring 23 is fixedly connected to the outer wall of the tank body 4. Multiple first support columns 24 are fixedly connected to the bottom of the support ring 23. The bottom of each first support column 24 is fixedly connected to the upper surface of the base 1. An exhaust pipe 32 is fixedly connected to the upper surface of the tank body 4. A one-way valve is installed on the exhaust pipe 32. Valve 33, inside the tank 4, from bottom to top, a water distributor 16, a support plate 17, and a water collector 19 are fixedly connected. A guide pipe 20 is fixedly connected to the bottom of the water collector 19, extending to the bottom of the water collector 19. A first metering pump 21 is fixedly installed on one side of the tank 4, electrically connected to the central controller 2. The inlet of the first metering pump 21 extends to one side of the inside of the water collector 19. A first outlet pipe 22 is fixedly connected to the outlet of the first metering pump 21, extending to one side of the heterotrophic denitrification tank 5 and fixedly connected. The treated water flows into the water collector 19 through the top of the guide pipe 20, and then flows through the first metering pump 21 and the first outlet pipe 22. The wastewater is transported to the heterotrophic denitrification tank 5. A small amount of nitrogen and other waste gases produced during the reaction are discharged through the exhaust pipe 32 at the top. A second metering pump 9 is fixedly connected to the other side of the heterotrophic denitrification tank 5. The second metering pump 9 is electrically connected to the central controller 2. The outlet of the second metering pump 9 extends to the inside of the heterotrophic denitrification tank 5, and a makeup pipe is fixedly connected to the inlet. The wastewater entering the mixing chamber of the heterotrophic denitrification tank 5 may still contain some nitrates. The second metering pump 9 adds a carbon source as needed. An overflow plate 12 is fixedly connected inside the heterotrophic denitrification tank 5. The left side of the overflow plate 12 is the mixing chamber, and the right side is the sedimentation chamber. A sludge return pump 15 is fixedly connected to one side of the sedimentation chamber of the overflow plate 12. The sludge return pump 15 is connected to the central controller 2. Electrically connected, the concentrated sludge settled at the bottom of the tank is continuously pumped back to the mixing chamber by the sludge return pump 15, thereby maintaining a high concentration of microbial community in the heterotrophic denitrification tank 5 and ensuring stable treatment efficiency. A stirring device 14 is installed in the mixing chamber and is electrically connected to the central controller 2. A baffle plate 13 is fixedly connected to the upper surface of the sedimentation chamber. A drain pipe 11 is fixedly connected to one side of the heterotrophic denitrification tank 5. The activated sludge flocs settle in the sedimentation chamber, and the supernatant is further clarified after passing through the baffle plate 13 and discharged through the drain pipe 11 to enter the subsequent treatment unit. Multiple second support columns 10 are fixedly connected to the bottom of the heterotrophic denitrification tank 5, and the bottom of each second support column 10 is fixedly connected to the upper surface of the base 1.

[0018] To remove sulfur and nitrogen, a sewage pipe 34 is fixedly connected to one side of the tank 4. One end of the sewage pipe 34 extends into the interior of the water distributor 16, and the other end is fixedly connected to the outlet of the fourth metering pump. The fourth metering pump is located in the collection tank for tap water and sewage. Multiple holes are provided on the upper surface of the support plate 17. The space between the support plate 17 and the water collector 19 is filled with sulfur autotrophic denitrification biological packing material 18. An mounting base 28 is fixedly connected to the upper surface of the base 1. A third metering pump 27 is fixedly connected to the upper surface of the mounting base 28. The third metering pump 27 is electrically connected to the central controller 2. The inlet of the third metering pump 27 is fixedly connected to one end of the water delivery pipe 26, and the outlet is fixedly connected to a second outlet pipe 29, which penetrates the tank. The bottom of tank 4 is fixedly connected to the bottom of water distributor 16. After the wastewater passes through filter 25 to remove solid impurities, it is precisely pressurized by the third metering pump 27 and transported to water distributor 16 at the bottom of tank 4 through the second outlet pipe 29. At the same time, nitrified liquid containing nitrate from the sewage treatment plant is also transported to water distributor 16 through the fourth metering pump and sewage pipe 34. After the two streams of wastewater are mixed in water distributor 16, they pass evenly upward through sulfur autotrophic denitrification biological packing 18 filled on support plate 17. Under anaerobic conditions, these microorganisms use sulfur ions in waste alkali liquid as electron donors to reduce nitrate ions in wastewater to nitrogen gas. At the same time, sulfur ions are oxidized to stable sulfate ions. This process is carried out at room temperature, realizing the simultaneous removal of sulfur and nitrogen. To achieve the purpose of gas transportation, a gas collection hood 6 is fixedly connected to the upper surface of the heterotrophic denitrification tank 5. A gas delivery pump 7 is fixedly connected to the upper surface of the gas collection hood 6. The gas delivery pump 7 is electrically connected to the central controller 2. A gas delivery pipe 8 is fixedly connected to the gas outlet end of the gas delivery pump 7. One end of the gas delivery pipe 8 passes through one side of the tank 4 and is fixedly connected. The other end of the gas delivery pipe 8 is located between the water distributor 16 and the support plate 17. Under the action of the stirring device 14, the heterotrophic denitrifying bacteria use carbon source to completely reduce nitrate ions to nitrogen gas. This process will generate a large amount of carbon dioxide. The gas collection hood 6 collects this carbon dioxide-rich gas and sends it back to the water distributor 16 area at the bottom of the tank 4 through the gas delivery pipe 8 by the gas delivery pump 7. After the carbon dioxide dissolves in water, it provides the necessary inorganic carbon source for the autotrophic denitrifying bacteria in the tank 4, realizing the recycling of carbon in the system and directly reducing carbon emissions.

[0019] Working principle: The sulfur-containing alkaline wastewater generated by the propane dehydrogenation unit is first discharged into the collection tank 3. A pH meter 30 and a sulfide concentration analyzer 31 in the tank monitor the water quality in real time and transmit the data to the central controller 2. After the wastewater passes through the filter 25 to remove solid impurities, it is precisely pressurized by the third metering pump 27 and transported to the water distributor 16 at the bottom of the tank 4 through the second outlet pipe 29. Simultaneously, nitrate-containing nitrate solution from the wastewater treatment plant is also transported to the water distributor 16 through the fourth metering pump and wastewater pipe 34. The two wastewater streams flow together in the water distributor 16. After mixing, the mixture is evenly fed upwards through the sulfur autotrophic denitrification biological packing 18 filled on the support plate 17. Under anaerobic conditions, these microorganisms use sulfur ions from the waste alkaline solution as electron donors to reduce nitrate ions in the wastewater to nitrogen gas. Simultaneously, the sulfur ions are oxidized to stable sulfate ions. This process takes place at room temperature, achieving simultaneous removal of sulfur and nitrogen. The treated water flows into the water collector 19 through the top of the guide pipe 20 and is then transported to the heterotrophic denitrification tank 5 via the first metering pump 21 and the first outlet pipe 22. During the reaction... The small amount of nitrogen and other waste gases produced are discharged through the exhaust pipe 32 at the top. The wastewater entering the mixing chamber of the heterotrophic denitrification tank 5 may still contain some nitrates. The second metering pump 9 adds carbon source as needed. Under the action of the stirring device 14, the heterotrophic denitrifying bacteria use the carbon source to completely reduce nitrate ions to nitrogen gas. This process produces a large amount of carbon dioxide. The gas collection hood 6 collects these carbon dioxide-rich gases and sends them back to the water distributor 16 area at the bottom of the tank 4 through the gas delivery pump 7 and the gas delivery pipe 8. After the carbon dioxide dissolves in water, it becomes part of the tank. The autotrophic denitrifying bacteria in tank 4 provide the necessary inorganic carbon source, realizing the recycling of carbon within the system and directly reducing carbon emissions. The sludge-water mixture that has completed the reaction passes over the overflow plate 12 and enters the sedimentation chamber. The activated sludge flocs settle in the sedimentation chamber, and the supernatant is further clarified after passing through the baffle plate 13 and discharged through the drain pipe 11 to enter the subsequent treatment unit. The concentrated sludge settled at the bottom of the tank is continuously pumped back to the mixing chamber by the sludge return pump 15, thereby maintaining a high concentration of microbial community in the heterotrophic denitrification tank 5 and ensuring stable treatment efficiency.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sulfur-containing waste alkaline solution treatment device, comprising a base (1), a central controller (2), a collection tank (3), a tank body (4), and a heterotrophic denitrification tank (5), characterized in that: The tank (4) is fixedly connected from bottom to top to a water distributor (16), a support plate (17), and a water collector (19). A sewage pipe (34) is fixedly connected to one side of the tank (4). One end of the sewage pipe (34) extends into the water distributor (16), and the other end is fixedly connected to the outlet of the fourth metering pump. The fourth metering pump is located in the collection tank for tap water and sewage. The upper surface of the support plate (17) has multiple holes. The space between the support plate (17) and the water collector (19) is filled with sulfur autotrophic denitrification biological packing material (18). The inside of the water collector (19) A guide pipe (20) is fixedly connected to the bottom, and the bottom of the guide pipe (20) extends to the bottom of the water collector (19). A gas collection hood (6) is fixedly connected to the upper surface of the heterotrophic denitrification tank (5). A gas delivery pump (7) is fixedly connected to the upper surface of the gas collection hood (6). The gas delivery pump (7) is electrically connected to the central controller (2). A gas delivery pipe (8) is fixedly connected to the gas outlet end of the gas delivery pump (7). One end of the gas delivery pipe (8) passes through one side of the tank (4) and is fixedly connected. One end of the gas delivery pipe (8) is located between the water distributor (16) and the support plate (17).

2. The sulfur-containing waste alkaline solution treatment device according to claim 1, characterized in that: The outer wall of the tank (4) is fixedly connected to a support ring (23), and the bottom of the support ring (23) is fixedly connected to a plurality of first support columns (24). The bottom of each first support column (24) is fixedly connected to the upper surface of the base (1). The upper surface of the tank (4) is fixedly connected to an exhaust pipe (32), and a one-way valve (33) is installed on the exhaust pipe (32).

3. The sulfur-containing waste alkaline solution treatment device according to claim 1, characterized in that: A first metering pump (21) is fixedly installed on one side of the tank (4). The first metering pump (21) is electrically connected to the central controller (2). The inlet of the first metering pump (21) extends to the inside of the water collector (19). The outlet of the first metering pump (21) is fixedly connected to a first outlet pipe (22). One end of the first outlet pipe (22) extends to one side of the heterotrophic denitrification tank (5) and is fixedly connected.

4. The sulfur-containing waste alkaline solution treatment device according to claim 1, characterized in that: A second metering pump (9) is fixedly connected to the other side of the heterotrophic denitrification tank (5). The second metering pump (9) is electrically connected to the central controller (2). The outlet of the second metering pump (9) extends to the inside of the heterotrophic denitrification tank (5). A replenishment pipe is fixedly connected to the inlet. An overflow plate (12) is fixedly connected inside the heterotrophic denitrification tank (5). The left side of the overflow plate (12) is a stirring chamber, and the right side is a sedimentation chamber. A baffle plate (13) is fixedly connected to the upper surface of the sedimentation chamber. A sludge return pump (15) is fixedly connected to one side of the sedimentation chamber of the overflow plate (12). The sludge return pump (15) is electrically connected to the central controller (2). A stirring device (14) is installed in the stirring chamber. The stirring device (14) is electrically connected to the central controller (2). A drain pipe (11) is fixedly connected to one side of the heterotrophic denitrification tank (5).

5. The sulfur-containing waste alkaline solution treatment device according to claim 1, characterized in that: The bottom of the heterotrophic denitrification tank (5) is fixedly connected to a plurality of second support columns (10), and the bottom of each second support column (10) is fixedly connected to the upper surface of the base (1).

6. The sulfur-containing waste alkaline solution treatment device according to claim 1, characterized in that: A filter (25) is fixedly connected to one side of the outlet of the collection tank (3), and a water supply pipe (26) is fixedly connected to one side of the filter (25). An installation seat (28) is fixedly connected to the upper surface of the base (1), and a third metering pump (27) is fixedly connected to the upper surface of the installation seat (28). The third metering pump (27) is electrically connected to the central controller (2). The inlet of the third metering pump (27) is fixedly connected to one end of the water supply pipe (26), and a second outlet pipe (29) is fixedly connected to the outlet. The second outlet pipe (29) passes through the bottom of the tank (4) and is fixedly connected to the bottom of the water distributor (16).

7. The sulfur-containing waste alkaline solution treatment device according to claim 1, characterized in that: A pH meter (30) and a sulfide concentration analyzer (31) are fixedly installed on one side of the inside of the collection tank (3). Both the pH meter (30) and the sulfide concentration analyzer (31) are electrically connected to the central controller (2).

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