A high-concentration urine purification treatment box

Abstract

This invention discloses a high-concentration urine purification and treatment box, relating to the field of locomotive sanitation equipment technology. It includes: a box body, the inner cavity of which is divided by a partition into an ammonia nitrogen stripping zone, a primary oxidation zone, a secondary oxidation zone, an electrode coupling zone, and an effluent treatment zone; a primary electrocatalytic oxidation device is installed at the lower part of the partition between the ammonia nitrogen stripping zone and the primary oxidation zone; a guide pipe and an overflow port are provided at the upper part of the partition between the primary oxidation zone and the secondary oxidation zone; a secondary electrocatalytic oxidation device is installed at the lower part of the partition between the secondary oxidation zone and the electrode coupling zone; scum collection tanks are provided in the ammonia nitrogen stripping zone, the primary oxidation zone, the secondary oxidation zone, and the electrode coupling zone; a scum discharge main pipe, from which all scum collection tanks converge via discharge pipelines; an electrocatalytic power supply; and an operation controller. This device can rapidly remove organic carbon, ammonia nitrogen, and color substances from high-concentration urine, while simultaneously clarifying the water quality, and the treatment effect is stable.

Description

Technical Field

[0001] This invention relates to the field of locomotive sanitation equipment technology, and more specifically, to a high-concentration urine purification and treatment box. Background Technology

[0002] Microbial degradation toilets, as energy-saving and environmentally friendly toilets, have enormous development potential and represent the mainstream development direction for future ecological toilets in locomotives.

[0003] The locomotive's microbial degradation toilet mainly consists of a toilet stall, squat toilet, urinal, and a microbial treatment tank control system. While microbial degradation toilets can harmlessly treat feces through microbial degradation, urine often cannot be treated. Currently, the approach follows fecal-urine separation, meaning urine can only be directly discharged or collected and discharged into the sewage network through special methods, consuming significant manpower and causing environmental pollution.

[0004] Existing technology discloses a novel fecal and urine treatment device. The purpose of this device is to filter out colloids and suspended solids in urine, reduce its color and turbidity, decrease COD, ammonia nitrogen, and phosphorus levels, and reduce antibiotic and other drug components, making the treated feces usable as fertilizer while ensuring the safety of the treated urine and preventing cross-infection. The filtration device is a membrane filtration device using a plate-type ceramic membrane with a pore size of 1µm. The urine treatment device includes an aeration device and a phosphorus recovery device. The aeration device uses ozone aeration to oxidize and decompose ammonia nitrogen in the wastewater. However, for high-concentration urine, ammonia nitrogen is in a dissolved ionic state, which cannot be removed by a ceramic membrane with a 1µm pore size. Furthermore, the ozone oxidation and decomposition of organic carbon and ammonia nitrogen in wastewater requires a long reaction time, making rapid oxidation of ammonia nitrogen impossible.

[0005] Existing technology also discloses a urine wastewater treatment device. For high-concentration urine, ammonia nitrogen exists in a dissolved ionic state, making it difficult to remove through adsorption and flocculation. Furthermore, the current generated by the iron-carbon galvanic cell is limited, resulting in a very low reaction rate, which cannot achieve rapid oxidation of ammonia nitrogen. Since the concentration of ammonia nitrogen in high-concentration urine wastewater exceeds 1000 mg / L, direct biological treatment is difficult because conventional nitrifying and nitrifying bacteria cannot grow rapidly, making it difficult to meet the ammonia nitrogen standards in the effluent. If chemical methods are used, such as the magnesium ammonium phosphate process, a large amount of sludge will be generated, making subsequent disposal difficult and unsuitable for locomotives. High-temperature evaporation or membrane distillation involves high temperatures, poses safety hazards, and has high energy consumption, making it unsuitable for locomotives as well.

[0006] In summary, how to quickly remove high concentrations of organic carbon, ammonia nitrogen, and color substances from urine, while rapidly clarifying the water and achieving stable treatment results, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a high-concentration urine purification treatment box that can quickly remove organic carbon, ammonia nitrogen and color substances from high-concentration urine, while rapidly clarifying the water quality and providing stable treatment results.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A high-concentration urine purification and treatment box, comprising:

[0010] The chamber is divided by partitions into an alkaline ammonia stripping zone, an acidic primary oxidation zone, an acidic secondary oxidation zone, an alkaline electrode coupling zone, and an effluent treatment zone. A primary electrocatalytic oxidation device is located at the lower part of the partition between the ammonia stripping zone and the primary oxidation zone, and a guide pipe and overflow port are located at the upper part of the partition. The guide pipe and overflow port are located at the upper part of the partition between the primary oxidation zone and the secondary oxidation zone. A secondary electrocatalytic oxidation device is located at the lower part of the partition between the secondary oxidation zone and the electrode coupling zone, and a flow hole is located at the lower part of the partition. The partitions separate the secondary oxidation zone from the effluent treatment zone, and also separate the electrode coupling zone from the effluent treatment zone.

[0011] A scum collection tank is used to collect foam scum. The scum collection tank is provided in the ammonia nitrogen stripping zone, the primary oxidation zone, the secondary oxidation zone, and the electrode coupling zone.

[0012] The scum discharge main pipe is connected to all the scum collection tanks via discharge pipelines.

[0013] An electrocatalytic power supply is used to provide direct current, and both the first-stage electrocatalytic oxidation device and the second-stage electrocatalytic oxidation device are connected to the electrocatalytic power supply.

[0014] The operating controller is connected to the electrocatalytic power source.

[0015] In one embodiment, the scum collection tank includes a first collection tank disposed on the partition between the primary oxidation zone and the secondary oxidation zone, a second collection tank disposed at the liquid surface of the ammonia nitrogen stripping zone, and a third collection tank disposed at the liquid surface of the electrode coupling zone.

[0016] In one embodiment, the box includes an inner box and an outer box fitted around the outer periphery of the inner box;

[0017] The outer casing is made of metal, while the inner casing is made of non-metallic material.

[0018] In one embodiment, the primary electrocatalytic oxidation device includes a first cathode electrode plate, a first anode electrode plate, a first ion exchange membrane device, a first fixing base, and fasteners, wherein the first ion exchange membrane device is fixed to the lower part of the partition plate by the fasteners;

[0019] The first fixing seat is located below the first ion exchange membrane device and at the bottom of the ammonia nitrogen stripping zone and the primary oxidation zone to fix the first cathode electrode plate and the first anode electrode plate.

[0020] In one embodiment, the secondary electrocatalytic oxidation device includes a second cathode electrode plate, a second anode electrode plate, a second ion exchange membrane device, a second fixing base, and fasteners, wherein the second ion exchange membrane device is fixed to the lower part of the partition plate by the fasteners;

[0021] The second fixing seat is located below the second ion exchange membrane device and at the bottom of the secondary oxidation zone and the electrode coupling zone to fix the second cathode electrode plate and the second anode electrode plate.

[0022] In one embodiment, the first cathode electrode plate and the first anode electrode plate are respectively located on both sides of the first ion exchange membrane device, and the distance between the first cathode electrode plate and the first anode electrode plate is less than or equal to 30 mm, and the first cathode electrode plate and the first anode electrode plate are both left with a gap from the first ion exchange membrane device.

[0023] The second cathode electrode plate and the second anode electrode plate are located on both sides of the second ion exchange membrane device, and the distance between the second cathode electrode plate and the second anode electrode plate is less than or equal to 30 mm. Both the second cathode electrode plate and the second anode electrode plate have gaps with the second ion exchange membrane device.

[0024] In one embodiment, the size of the second cathode electrode plate is smaller than the size of the first cathode electrode plate;

[0025] The size of the second anode electrode plate is smaller than the size of the first anode electrode plate;

[0026] The second ion exchange membrane device is smaller than the first ion exchange membrane device;

[0027] The size of the second fixing seat is smaller than the size of the first bottom fixing seat.

[0028] In one embodiment, the first ion exchange membrane device includes a first membrane fixing frame, a first cation exchange membrane, a first membrane pressure plate, and a PTFE gasket.

[0029] The first membrane clamping plate clamps and fixes the first cation exchange membrane within the first membrane fixing frame, and the PTFE gasket is located outside the first membrane clamping plate to press the separator between the separator and the first ion exchange membrane device.

[0030] In one embodiment, the second ion exchange membrane device includes a second membrane fixing frame, a second cation exchange membrane, and a second membrane pressure plate;

[0031] The second membrane plate clamps and fixes the second cation exchange membrane within the second membrane fixing frame.

[0032] In one embodiment, the first cathode electrode plate, the first anode electrode plate, the second cathode electrode plate, and the second anode electrode plate are all provided with a plurality of nipple-like protrusions on the electrode plate.

[0033] In one embodiment, the first anode electrode plate and the second anode electrode plate are both titanium-based metal parts, and the first cathode electrode plate and the second cathode electrode plate are both stainless steel parts.

[0034] In one embodiment, the system further includes a first suction pump for pumping water from the secondary oxidation zone to the primary oxidation zone, a second suction pump for pumping water from the secondary oxidation zone to the effluent treatment zone, a third suction pump for pumping water from the electrode coupling zone to the effluent treatment zone for acid-base neutralization, and a fourth suction pump, wherein the fourth suction pump is used to pump liquid out of the tank.

[0035] In one embodiment, the effluent treatment area is equipped with a pH sensor and a liquid level sensor, both of which are connected to the operation controller.

[0036] In one embodiment, it further includes an aeration device for stripping free ammonia, the aeration device comprising a perforated tubular aeration pipe and a blower;

[0037] The aeration pipe is located at the bottom of the inner cavity of the ammonia nitrogen stripping zone, and the end of the aeration pipe is connected to the blower through an air pipeline.

[0038] In one embodiment, a dechlorination packing material for removing residual oxides from the water is also included, the dechlorination packing material being disposed in the lower part of the effluent treatment zone.

[0039] The beneficial effects of this invention are that, when using the high-concentration urine purification treatment box provided by this invention, it follows the concept of electrocatalytic treatment, setting up a primary electrocatalytic oxidation device and a secondary electrocatalytic oxidation device inside the box. The cathode areas and anode areas of the two electrocatalytic oxidation devices correspond one-to-one, and the cathode and anode areas are separated by a partition. According to the treatment process, the inner cavity of the box is respectively set as an ammonia nitrogen stripping zone, a primary oxidation zone, a secondary oxidation zone, and an electrode coupling zone. The cathode areas of the two electrocatalytic oxidation devices are respectively located in the ammonia nitrogen stripping zone and the electrode coupling zone, and the water quality in this area is alkaline during operation. The anode areas of the two electrocatalytic oxidation devices are respectively located in the primary oxidation zone and the secondary oxidation zone, and the water quality in this area is acidic during operation, and oxidizing substances such as hydroxyl radicals and hypochlorite ions are generated on the surface of the anode plate in the anode area.

[0040] First, high-concentration urine from the outside enters the ammonia stripping zone of the chamber. Under alkaline conditions, the high-concentration urine undergoes an ammonification reaction, releasing free ammonia to partially remove ammonia nitrogen. Then, the liquid in the ammonia stripping zone overflows into the primary oxidation zone through the guide pipe and overflow port under the propulsion effect. Subsequently, under acidic conditions, oxidizing agents such as hydroxyl radicals and hypochlorite ions rapidly react with pollutants in the water, including organic carbon, ammonia nitrogen, and color substances, to produce harmless substances such as carbon dioxide, nitrogen, water, and inorganic salts, thus removing organic carbon, ammonia nitrogen, and color substances.

[0041] Considering the issue of secondary pollution, the ammonia nitrogen stripping zone has the highest concentration of pollutants. Therefore, a secondary oxidation zone and an electrode coupling zone are set up to further reduce the pollutant concentration, with the alkaline water mainly originating from the electrode coupling zone. To improve overall reaction efficiency, the liquids in the primary and secondary oxidation zones can undergo closed-loop circulation, creating a plug flow operation based on the pollutant concentration gradient. Subsequently, the secondary oxidation zone can oxidize and remove organic carbon, ammonia nitrogen, and color substances to meet the emission or reuse requirements.

[0042] Since both oxidation zones are anodic zones for electrocatalytic acid and oxidizing agents, an effluent treatment zone is designed to adjust the pH of the treated water to meet standards. The electrode coupling zone, corresponding to the secondary oxidation zone, has a cathode plate that serves as an alkali-producing zone, providing alkaline water for pH adjustment. Water is drawn from the secondary oxidation zone and electrode coupling zone and mixed in the effluent treatment zone to adjust the pH to the required level before being discharged. Furthermore, a flow hole is located at the bottom of the partition between the secondary oxidation zone and the electrode coupling zone to maintain liquid level balance and provide a flow channel for replenishing the liquid in the electrode coupling zone, thus enabling the treatment of high-concentration urine contaminants.

[0043] Meanwhile, when the controller operates the electrocatalytic power supply, which in turn controls the primary or secondary electrocatalytic oxidation unit, direct current is applied to the anode and cathode plates of the two units. This generates numerous microbubbles on the surface of the plates, and the oxidation and decomposition of pollutants also produces these microbubbles. As these bubbles rise, they adhere to colloidal pollutants and suspended solids in the water, forming flotation separation and generating a large amount of foamy scum on the surface. Scum collection tanks located in the ammonia nitrogen stripping zone, primary oxidation zone, secondary oxidation zone, and electrode coupling zone collect the foamy scum from the corresponding treatment areas.

[0044] Subsequently, by monitoring the changes in influent and effluent levels, the overflowing scum from different treatment areas is collected via overflow and then discharged through the discharge pipeline to the main scum discharge pipe. In other words, this device can collect and transfer foamy scum through the scum collection tank, effectively clarifying the water quality and achieving the goal of rapidly removing high concentrations of organic carbon, ammonia nitrogen, and color substances from urine, while simultaneously clarifying the water quality and maintaining stable treatment results.

[0045] This device follows the principle of graded and efficient treatment. The treatment zones are designed to effectively treat pollutants of specific properties, which not only shortens the entire treatment process but also achieves the expected purification effect for high-concentration urine. It is very suitable for on-board sewage treatment in locomotives, engineering vehicles, and other similar applications.

[0046] In summary, the high-concentration urine purification treatment box provided by this invention can quickly remove organic carbon, ammonia nitrogen, and color substances from high-concentration urine, while rapidly clarifying the water quality, and the treatment effect is stable. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0048] Figure 1 The process flow diagram of the high-concentration urine purification treatment box provided by the present invention;

[0049] Figure 2 A top view of a high-concentration urine purification treatment tank;

[0050] Figure 3 This is a front view of the high-concentration urine purification treatment box;

[0051] Figure 4 This is a schematic diagram of the first ion exchange membrane device.

[0052] Figure 5 This is a schematic diagram of the first ion exchange membrane device from another perspective.

[0053] Figure 6 This is a front view of the first ion exchange membrane device;

[0054] Figure 7 This is a cross-sectional view of the first ion exchange membrane device;

[0055] Figure 8 This is a schematic diagram of the second ion exchange membrane device;

[0056] Figure 9 This is a schematic diagram of the second ion exchange membrane device from another perspective.

[0057] Figure 10 This is a front view of the second ion exchange membrane device;

[0058] Figure 11 This is a cross-sectional view of the second ion exchange membrane device.

[0059] Figures 1-11 middle:

[0060] 1 is the housing, 2 is the inlet pipe, 3 is the primary electrocatalytic oxidation device, 31 is the first cathode electrode plate, 32 is the first anode electrode plate, 33 is the first ion exchange membrane device, 331 is the first membrane fixing frame, 332 is the first cation exchange membrane, 333 is the first membrane pressure plate, 334 is the PTFE gasket, 34 is the first fixing seat, 35 is the fastener, 4 is the partition plate, 5 is the secondary electrocatalytic oxidation device, 51 is the second cathode electrode plate, 52 is the second anode electrode plate, 53 is the second ion exchange membrane device, 531 is the second membrane fixing frame, 532 is the second cation exchange membrane, 533 is the second... 54 is the second fixed seat, 6 is the scum collection tank, 71 is the first suction pump, 72 is the second suction pump, 73 is the third suction pump, 74 is the fourth suction pump, 8 is the guide pipe, 9 is the aeration device, 10 is the electrocatalytic power supply, 11 is the operation controller, 12 is the pH sensor, 13 is the blower, 14 is the liquid level sensor, 15 is the scum discharge main pipe, 16 is the dechlorination packing, 17 is the aeration pipe, A is the ammonia nitrogen stripping zone, B is the primary oxidation zone, C1 is the first collection tank, C2 is the second collection tank, C3 is the third collection tank, D is the secondary oxidation zone, E is the electrode coupling zone, and F is the effluent treatment zone. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] The core of this invention is to provide a high-concentration urine purification treatment box that can quickly remove organic carbon, ammonia nitrogen and color substances from high-concentration urine, while rapidly clarifying the water quality and providing stable treatment results.

[0063] Please refer to Figures 1 to 11 .

[0064] This specific embodiment provides a high-concentration urine purification treatment box, including:

[0065] The chamber 1 is divided into an alkaline ammonia stripping zone A, an acidic primary oxidation zone B, an acidic secondary oxidation zone D, an alkaline electrode coupling zone E, and an effluent treatment zone F by a partition 4. A primary electrocatalytic oxidation device 3 is located at the lower part of the partition 4 between the ammonia stripping zone A and the primary oxidation zone B. A guide pipe 8 and an overflow port are located at the upper part of the partition 4. A guide pipe 8 and an overflow port are located at the upper part of the partition 4 between the primary oxidation zone B and the secondary oxidation zone D. A secondary electrocatalytic oxidation device 5 is located at the lower part of the partition between the secondary oxidation zone D and the electrode coupling zone E. A flow hole is located at the lower part of the partition. The secondary oxidation zone D and the effluent treatment zone F, as well as the electrode coupling zone E and the effluent treatment zone F, are all separated by partition 4.

[0066] Scum collection tank 6 is used to collect foam scum. Scum collection tank 6 is provided in ammonia nitrogen stripping zone A, primary oxidation zone B, secondary oxidation zone D and electrode coupling zone E.

[0067] The scum discharge main pipe 15 is used to collect scum from each scum collection tank 6 through discharge pipelines to the scum discharge main pipe 15.

[0068] Electrocatalytic power supply 10 is used to provide direct current. The first-stage electrocatalytic oxidation device 3 and the second-stage electrocatalytic oxidation device 5 are both connected to the electrocatalytic power supply 10.

[0069] The operation controller 11 is connected to the electrocatalytic power supply 10.

[0070] It should be noted that an inlet pipe 2 can be installed at the top of tank 1, connecting to the ammonia nitrogen stripping zone A of tank 1 to introduce high-concentration urine into tank 1. This device follows the concentration characteristics of substances at different treatment stages, setting up corresponding process treatment zones. Utilizing the characteristic that urine easily undergoes ammoniation in alkaline zones to precipitate free ammonia, an ammoniation stripping zone is set up to achieve the first-step treatment of high-concentration ammonia nitrogen wastewater, reducing the load on subsequent treatments. Furthermore, based on the characteristic that hypochlorite ions easily generate hypochlorous acid with strong oxidizing properties under acidic conditions, separate anodic oxidation zones (primary oxidation zone B and secondary oxidation zone D) are set up, separately from the cathode zone, to oxidize and decompose organic carbon, ammonia nitrogen, and color substances in the water, achieving rapid treatment.

[0071] In other words, this device, based on the characteristics of electrocatalytic oxidation treatment of high-concentration urine, is equipped with ammoniation stripping, two-stage electrocatalytic oxidation and other methods to quickly remove organic carbon, ammonia nitrogen, color substances and suspended solids from the water, and quickly clarify the water quality. Finally, the pH value is adjusted in the effluent treatment zone F to make the effluent meet the requirements for toilet flushing, effectively shortening the sewage treatment process and achieving the expected purification effect for high-concentration urine treatment.

[0072] In practical applications, the shape, structure, location, and type of the following components can be determined based on actual conditions and needs: tank 1, ammonia nitrogen stripping zone A, primary oxidation zone B, secondary oxidation zone D, electrode coupling zone E, effluent treatment zone F, scum discharge main pipe 15, electrocatalytic power supply 10, operation controller 11, primary electrocatalytic oxidation device 3, and secondary electrocatalytic oxidation device 5.

[0073] When using the high-concentration urine purification treatment box provided by this invention, it follows the concept of electrocatalytic treatment. A primary electrocatalytic oxidation device 3 and a secondary electrocatalytic oxidation device 5 are installed inside the box body 1. The cathode areas and anode areas of the two electrocatalytic oxidation devices correspond one-to-one, and the cathode and anode areas are separated by a partition 4. According to the treatment process, the inner cavity of the box body 1 is respectively set as an ammonia nitrogen stripping zone A, a primary oxidation zone B, a secondary oxidation zone D, and an electrode coupling zone E. The cathode areas of the two electrocatalytic oxidation devices are respectively located in the ammonia nitrogen stripping zone A and the electrode coupling zone E, where the water quality is alkaline during operation. The anode areas of the two electrocatalytic oxidation devices are respectively located in the primary oxidation zone B and the secondary oxidation zone D, where the water quality is acidic during operation, and oxidizing substances such as hydroxyl radicals and hypochlorite ions are generated on the surface of the anode plates in the anode areas.

[0074] First, high-concentration urine from the outside enters the ammonia nitrogen stripping zone A of chamber 1. Under alkaline conditions, the high-concentration urine undergoes an ammonification reaction, releasing free ammonia to partially remove ammonia nitrogen. Then, the liquid in ammonia nitrogen stripping zone A overflows into the primary oxidation zone B through the guide pipe 8 and overflow port under a push-flow action. Subsequently, under acidic conditions, oxidizing agents such as hydroxyl radicals and hypochlorite ions rapidly react with pollutants in the water, including organic carbon, ammonia nitrogen, and color substances, to produce harmless substances such as carbon dioxide, nitrogen, water, and inorganic salts, thus achieving the removal of organic carbon, ammonia nitrogen, and color substances.

[0075] Considering the issue of secondary pollution, the concentration of pollutants in the ammonia nitrogen stripping zone A is the highest. Therefore, a secondary oxidation zone D and an electrode coupling zone E are set up to further reduce the pollutant concentration, with the alkaline water mainly originating from the electrode coupling zone E. To improve the overall reaction efficiency, the liquids in the primary oxidation zone B and the secondary oxidation zone D can undergo a closed-loop circulation reaction, creating a plug flow operation based on the pollutant concentration difference. Subsequently, the secondary oxidation zone D can oxidize and remove organic carbon, ammonia nitrogen, and color substances to the required emission or reuse standards.

[0076] Since both oxidation zones are anodic zones that electrocatalytically produce acid and oxidizing substances, an effluent treatment zone F is designed to adjust the pH of the treated water to meet the required standards. The electrode coupling zone E, corresponding to the secondary oxidation zone D, has a cathode plate that serves as an alkali-producing zone, providing alkaline water for pH adjustment. Water is drawn from the secondary oxidation zone D and electrode coupling zone E and mixed in the effluent treatment zone F to adjust the pH of the liquid in F to the required level before being discharged. Furthermore, a flow hole is provided at the bottom of the partition between the secondary oxidation zone D and the electrode coupling zone E to maintain liquid level balance and provide a flow channel for replenishing the liquid in the electrode coupling zone E, thus enabling the treatment of contaminants in high-concentration urine.

[0077] Meanwhile, when the controller 11 controls the electrocatalytic power supply 10, and in turn controls the operation of the primary electrocatalytic oxidation device 3 or the secondary electrocatalytic oxidation device 5, direct current is applied to the anode and cathode plates of the two electrocatalytic oxidation devices. A large number of microbubbles are generated on the surface of the anode and cathode plates, and the oxidation and decomposition of pollutants also produces microbubbles. These bubbles adhere to colloidal pollutants and suspended solids in the water during their ascent, forming flotation separation and generating a large amount of foam scum on the liquid surface. Scum collection tanks 6, located in the ammonia nitrogen stripping zone A, primary oxidation zone B, secondary oxidation zone D, and electrode coupling zone E, can collect the foam scum from the corresponding treatment zones.

[0078] Subsequently, by controlling the changes in the influent and effluent levels, the overflowing scum from different treatment areas is collected via overflow and discharged through the discharge pipeline to the scum discharge main pipe 15. In other words, this device can collect and transfer foam scum through the scum collection tank 6, effectively clarifying the water quality and achieving the goal of rapidly removing high concentrations of organic carbon, ammonia nitrogen, and color substances from urine, while simultaneously clarifying the water quality and maintaining stable treatment results.

[0079] This device follows the principle of graded and efficient treatment. The treatment zones are designed to effectively treat pollutants of specific properties, which not only shortens the entire treatment process but also achieves the expected purification effect for high-concentration urine. It is very suitable for on-board sewage treatment in locomotives, engineering vehicles, and other similar applications.

[0080] In summary, the high-concentration urine purification treatment box provided by this invention can quickly remove organic carbon, ammonia nitrogen, and color substances from high-concentration urine, while rapidly clarifying the water quality, and the treatment effect is stable.

[0081] In one embodiment, the scum collection tank 6 includes a first collection tank C1 located on a partition 4 between the primary oxidation zone B and the secondary oxidation zone D, a second collection tank C2 located at the liquid surface of the ammonia nitrogen stripping zone A, and a third collection tank C3 located at the liquid surface of the electrode coupling zone E.

[0082] It should be noted that the first collection tank C1 can be used as a shared scum collection tank for both the primary oxidation zone B and the secondary oxidation zone D. The second collection tank C2 is used to collect scum near the liquid surface in the ammonia-nitrogen stripping zone A, and the third collection tank C3 is used to collect scum near the liquid surface in the electrode coupling zone E. Furthermore, the three collection tanks for collecting scum can each be connected to the scum discharge main pipe 15 via discharge pipelines to discharge the collected scum externally.

[0083] In one embodiment, the housing 1 includes an inner box and an outer box fitted around the outer periphery of the inner box; the outer box is made of metal and the inner box is made of non-metallic material.

[0084] It should be noted that the housing 1 consists of two layers, an outer and an inner. The outer housing is made of metal to effectively enhance the mechanical strength of the housing 1. The inner housing is made of non-metallic material, which serves as an insulating barrier to prevent the anode electrode plate of the electrocatalytic oxidation device inside the housing 1 from becoming conductive with the outer housing, thus avoiding electrochemical corrosion.

[0085] In one embodiment, the primary electrocatalytic oxidation device 3 includes a first cathode electrode plate 31, a first anode electrode plate 32, a first ion exchange membrane device 33, a first fixing base 34, and fasteners 35. The first ion exchange membrane device 33 is fixed to the lower part of the partition plate 4 by the fasteners 35.

[0086] The first fixing seat 34 is located below the first ion exchange membrane device 33 and at the bottom of the ammonia-nitrogen stripping zone A and the primary oxidation zone B, to fix the first cathode electrode plate 31 and the first anode electrode plate 32. That is, the first fixing seat 34 is placed directly below the first ion exchange membrane device 33, and the two ends of the first fixing seat 34 are respectively placed on both sides of the first ion exchange membrane device 33. The first fixing seat 34 can be fixed to the bottom of the ammonia-nitrogen stripping zone A and the primary oxidation zone B by welding.

[0087] In one embodiment, the secondary electrocatalytic oxidation device 3 includes a second cathode electrode plate 51, a second anode electrode plate 52, a second ion exchange membrane device 53, a second fixing base 54, and fasteners 35. The second ion exchange membrane device 53 is fixed to the lower part of the partition plate 4 by the fasteners 35.

[0088] The second fixing seat 54 is located below the second ion exchange membrane device 53 and at the bottom of the secondary oxidation zone D and the electrode coupling zone E to fix the second cathode electrode plate 51 and the second anode electrode plate 52. That is, the second fixing seat 54 is placed directly below the second ion exchange membrane device 53, and the two ends of the second fixing seat 54 are respectively placed on both sides of the ion exchange membrane device 53. The second fixing seat 54 can be fixed to the bottom of the secondary oxidation zone D and the electrode coupling zone E by welding.

[0089] In one embodiment, the first cathode electrode plate 31 and the first anode electrode plate 32 are located on opposite sides of the first ion exchange membrane device 33. For example, a toothed groove can be provided on the upper part of the first fixing base 34 to respectively receive and fix the first cathode electrode plate 31 and the first anode electrode plate 32, ensuring that the first cathode electrode plate 31 and the first anode electrode plate 32 are positioned on opposite sides of the first ion exchange membrane device 33. Moreover, the distance between the first cathode electrode plate 31 and the first anode electrode plate 32 is less than or equal to 30 mm, and a gap is left between the first cathode electrode plate 31 and the first anode electrode plate 32 and the first ion exchange membrane device 33 to ensure the electrocatalytic oxidation effect of the first-stage electrocatalytic oxidation device 3.

[0090] The second cathode electrode plate 51 and the second anode electrode plate 52 are respectively located on both sides of the second ion exchange membrane device 53. For example, a toothed groove can be provided on the upper part of the second fixing seat 54 to respectively receive and fix the second cathode electrode plate 51 and the second anode electrode plate 52, ensuring that the second cathode electrode plate 51 and the second anode electrode plate 52 are positioned on both sides of the second ion exchange membrane device 53. Moreover, the distance between the second cathode electrode plate 51 and the second anode electrode plate 52 is less than or equal to 30 mm, and both the second cathode electrode plate 51 and the second anode electrode plate 52 have gaps with the second ion exchange membrane device 53 to ensure the electrocatalytic oxidation effect of the secondary electrocatalytic oxidation device 3.

[0091] In one embodiment, the size of the second cathode electrode plate 51 is smaller than the size of the first cathode electrode plate 31;

[0092] The size of the second anode electrode plate 52 is smaller than the size of the first anode electrode plate 32;

[0093] The size of the second ion exchange membrane device 53 is smaller than the size of the first ion exchange membrane device 33;

[0094] The size of the second fixing seat 54 is smaller than the size of the first bottom fixing seat 34.

[0095] It should be noted that the ammonia nitrogen stripping zone A has the highest concentration of pollutants, so the primary electrocatalytic oxidation device 3, located between the ammonia nitrogen stripping zone A and the primary oxidation zone B, serves as the main electrocatalytic oxidation device. Conversely, the pollutant concentration in the secondary oxidation zone D is relatively low, so the secondary electrocatalytic oxidation device 5, located between the secondary oxidation zone D and the electrode coupling zone E, serves as the secondary electrocatalytic oxidation device. Therefore, the dimensions of the second cathode electrode plate 51, the second anode electrode plate 52, the second ion exchange membrane device 53, and the second fixing base 54 are all smaller than those of the first cathode electrode plate 31, the first anode electrode plate 32, the first ion exchange membrane device 33, and the first bottom fixing base 34. This satisfies the requirements of electrocatalytic oxidation while also making the device structure more compact and the layout more rational.

[0096] In one embodiment, the first ion exchange membrane device 33 includes a first membrane fixing frame 331, a first cation exchange membrane 332, a first membrane pressure plate 333, and a PTFE gasket 334.

[0097] The first membrane clamping plate 333 clamps and fixes the first cation exchange membrane 332 within the first membrane fixing frame 331. The PTFE gasket 334 is located outside the first membrane clamping plate 333 to press the separator 4 against the first ion exchange membrane device 33. This prevents the liquid in the ammonia nitrogen stripping zone A from flowing into the primary oxidation zone B below the separator 4.

[0098] In one embodiment, the second ion exchange membrane device 53 includes a second membrane fixing frame 531, a second cation exchange membrane 532, and a second membrane clamping plate 533; the second membrane clamping plate 533 clamps and fixes the second cation exchange membrane 532 within the second membrane fixing frame 531. This prevents large-scale exchange of liquid between the secondary oxidation zone D and the electrode coupling zone E when the liquid level is balanced, and avoids the passage of suspended matter with a particle size greater than 1 mm. Simultaneously, it provides a flow channel with a certain throughput while maintaining a liquid level difference between the secondary oxidation zone D and the electrode coupling zone E.

[0099] In one embodiment, the first cathode electrode plate 31, the first anode electrode plate 32, the second cathode electrode plate 51, and the second anode electrode plate 52 are all provided with a plurality of nipple-like protrusions on the electrode plate.

[0100] It should be noted that the first cathode electrode plate 31, the first anode electrode plate 32, the second cathode electrode plate 51, and the second anode electrode plate 52 are all electrically connected to the electrocatalytic power supply 10. That is, the electrocatalytic power supply 10 can apply direct current to the first cathode electrode plate 31, the first anode electrode plate 32, the second cathode electrode plate 51, and the second anode electrode plate 52, causing the cathode and anode electrode plates to undergo an electrocatalytic oxidation reaction. A large number of microbubbles will be generated on the electrode plate surface, and the oxidation and decomposition of pollutants will also produce microbubbles. Simultaneously, these bubbles, during their ascent, will adhere to colloidal pollutants and suspended solids in the water, forming a flotation separation and generating a large amount of foam scum on the liquid surface. Finally, the foam scum can be collected by the scum collection tank 6 in the ammonia nitrogen stripping zone A, the primary oxidation zone B, the secondary oxidation zone D, and the electrode coupling zone E, and discharged externally.

[0101] It should also be noted that designing a large number of milky protrusions on the electrode plate can increase the conductive surface area of ​​the electrode plate, enhance the generation and desorption of microbubbles, and reduce the probability of collision and merging between bubbles.

[0102] In one embodiment, the first anode electrode plate 32 and the second anode electrode plate 52 are both titanium-based metal parts, and the first cathode electrode plate 31 and the second cathode electrode plate 51 are both stainless steel parts.

[0103] It should be noted that conductive rods can be welded to flat electrode plates to guide the current from the electrocatalytic power supply 10 into the underwater electrode plates. The anode electrode plates can be made of titanium-based metal with iridium dioxide and ruthenium dioxide sintered on the surface, while the cathode electrode plates can be made of stainless steel.

[0104] In one embodiment, the system further includes a first suction pump 71 for pumping water from the secondary oxidation zone D to the primary oxidation zone B, a second suction pump 72 for pumping water from the secondary oxidation zone D to the effluent treatment zone F, a third suction pump 73 for pumping water from the electrode coupling zone E to the effluent treatment zone F for acid-base neutralization, and a fourth suction pump 74, the fourth suction pump 74 being used to pump liquid out of the tank 1.

[0105] Specifically, the first suction pump 71 is used to pump water from the secondary oxidation zone D and transport it to the primary oxidation zone B to achieve plug-flow circulation between the two oxidation zones. The second suction pump 72 is used to pump water from the secondary oxidation zone D and transport it to the effluent treatment zone F. The third suction pump 73 is used to pump water from the electrode coupling zone E and transport it to the effluent treatment zone F to neutralize the liquid's acidity and alkali and adjust the pH value of the effluent. The fourth suction pump 74 is used to pump the liquid out of the tank 1 for external discharge or recycling.

[0106] In one embodiment, the effluent treatment area F is equipped with a pH sensor 12 and a liquid level sensor 14, both of which are connected to the operation controller 11.

[0107] It should be noted that after the high-concentration urine is treated in the primary oxidation zone B and the secondary oxidation zone D, the pH value of the wastewater does not meet the discharge requirements. Therefore, an effluent treatment zone F is set up to adjust the pH value of the wastewater. The alkaline water for acid-base neutralization must originate from the cathode zone. Considering the issue of secondary pollution, the ammonia nitrogen stripping zone A has the highest concentration of pollutants and is clearly unsuitable. Therefore, a secondary oxidation zone D and an electrode coupling zone E (i.e., the cathode zone) are set up, where the pollutant concentration needs to be lower. The alkaline water mainly originates from the electrode coupling zone E.

[0108] It should also be noted that by setting pH sensor 12 and liquid level sensor 14 in the effluent treatment area F, the pH sensor 12 and liquid level sensor 14 can transmit the signals they measure to the operation controller 11. The operation controller 11 can regulate the operation of the second suction pump 72, the third suction pump 73 and the fourth suction pump 74 to ensure that the effluent water quality meets the standards and maintains the stability of operation.

[0109] In one embodiment, the device further includes an aeration device 9 for stripping free ammonia. The aeration device 9 includes a perforated tubular aeration pipe 17 and a blower 13. The aeration pipe 17 is located at the bottom of the inner cavity of the ammonia nitrogen stripping zone A, and the end of the aeration pipe 17 is connected to the blower 13 through an air pipeline.

[0110] It should be noted that the aeration device 9 installed at the bottom of the inner cavity of the ammonia nitrogen stripping zone A is used for the stripping of free ammonia. The aeration device 9 includes a perforated tubular aeration pipe 17 and a blower 13. One end of the aeration pipe 17 is connected to the blower 13 via an air line, so that compressed air generated by the blower 13 is input into the aeration device 9 for aeration, thereby stripping free ammonia from the water. That is, high-concentration urine from the outside first enters the ammonia nitrogen stripping zone A. Under alkaline conditions, the urine undergoes ammonification, releasing free ammonia. By installing the perforated aeration pipe 17 in the ammonia nitrogen stripping zone A and injecting compressed air through the blower 13 for aeration, free ammonia in the water can be continuously carried to the surface, causing continuous precipitation of free ammonia in the water, ultimately achieving the goal of partially removing ammonia nitrogen.

[0111] In one embodiment, a dechlorination packing 16 for removing residual oxides from the water is also included, and the dechlorination packing 16 is disposed in the lower part of the effluent treatment zone F. That is, by installing the dechlorination packing 16 in the lower part of the effluent treatment zone F, residual oxides in the water can be effectively removed, reducing the corrosion of pipeline materials by the discharged water.

[0112] The high-concentration urine purification treatment tank provided by this invention aims to treat high-concentration urine wastewater. Based on the characteristics of electrocatalytic oxidation, it incorporates ammoniation stripping, two-stage electrocatalytic oxidation, and microbubble flotation to rapidly remove organic carbon, ammonia nitrogen, color substances, and suspended solids from the water, quickly clarifying the water quality. Finally, by adjusting the pH value and removing residual oxides, the effluent meets the requirements for toilet flushing.

[0113] This device is designed according to the concentration characteristics of substances at different treatment stages, with corresponding process treatment zones. Taking advantage of the ease with which urine readily ammonifies and releases free ammonia in alkaline conditions, an ammonia stripping zone A is established to achieve the first-stage treatment of high-concentration ammonia nitrogen wastewater, reducing the load on subsequent treatments. Based on the characteristic that hypochlorite ions readily generate highly oxidizing hypochlorous acid under acidic conditions, separate anodic oxidation zones (primary oxidation zone B and secondary oxidation zone D) are set up to oxidize and decompose organic carbon, ammonia nitrogen, and color substances in the water, achieving rapid treatment.

[0114] Based on the characteristic that high-concentration urine is prone to foaming, an electrode plate with a papillary structure was designed. This not only increases the conductive area but also facilitates the generation and rapid detachment of microbubbles, reducing the probability of bubble collision and fusion, thus enhancing the flotation effect. Simultaneously, scum collection tanks 6 are installed in the microbubble generation area to facilitate the removal of organic pollutants and suspended solids floated by the bubbles, thereby rapidly clarifying the water quality.

[0115] This device utilizes an electrocatalytic process to generate alkaline water in the cathode region. An electrode coupling zone E, designed to complement the secondary oxidation zone, provides alkaline water for acid neutralization in the effluent treatment zone F, eliminating the need for an external alkaline dosing device and reducing the daily maintenance workload of replenishing chemicals.

[0116] In addition, in order to ensure that the treated effluent can be reused for toilet flushing, dechlorination packing 16 is designed in the effluent treatment area F to remove most of the residual oxides in the water and reduce corrosion to the subsequent water pipeline materials.

[0117] The treatment process of this device follows the principle of tiered and efficient treatment. Each treatment process is highly effective against specific pollutants, fully considering the operating environment and mode of locomotives and track maintenance vehicles, and meeting the special requirements of the rail transit sector. In terms of structural design, a simple and practical double-layer box structure was chosen to ensure structural strength and vibration and impact resistance, which conforms to the principle of compactness while enhancing the impact resistance of box 1. This ensures reliable safety of the device during actual use.

[0118] It should be noted that the first collection tank C1, the second collection tank C2, the third collection tank C3, the first cathode electrode plate 31, the second cathode electrode plate 51, the first anode electrode plate 32, the second anode electrode plate 52, the first ion exchange membrane device 33, the second ion exchange membrane device 53, the first fixing seat 34, the second fixing seat 54, the first membrane fixing frame 331, the second membrane fixing frame 531, the first cation exchange membrane 332, the second cation exchange membrane 532, the first membrane pressing plate 333, and the second membrane pressing plate 533 mentioned in this invention are only distinguished by their different positions and do not have any order of precedence.

[0119] In addition, it should be noted that the orientation or positional relationship indicated by "up and down" in this invention is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the purpose of simplifying the description and making it easier to understand, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0120] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this invention is within the scope of protection of this invention and will not be elaborated upon here.

[0121] The high-concentration urine purification treatment box provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A high concentration urine purification treatment tank characterized by comprising: It comprises: a box (1), the inner cavity of which is divided into ammonia-nitrogen blow-off area (A) which is alkaline, primary oxidation area (B) which is acidic, secondary oxidation area (D) which is acidic, electrode coupling area (E) which is alkaline and water outlet finishing area (F) by a partition plate (4); the lower part of the partition plate (4) between the ammonia-nitrogen blow-off area (A) and the primary oxidation area (B) is provided with a primary electro-catalytic oxidation device (3), and the upper part of the partition plate is provided with a flow guide pipe (8) and an overflow port; the upper part of the partition plate (4) between the primary oxidation area (B) and the secondary oxidation area (D) is provided with the flow guide pipe (8) and the overflow port; the lower part of the partition plate between the secondary oxidation area (D) and the electrode coupling area (E) is provided with a secondary electro-catalytic oxidation device (5), and the lower part of the partition plate is provided with a flow-through hole; the secondary oxidation area (D) and the water outlet finishing area (F) and the electrode coupling area (E) and the water outlet finishing area (F) are all isolated by the partition plate (4); a scum collecting tank (6) for collecting foam scum, which is provided in the ammonia-nitrogen blow-off area (A), the primary oxidation area (B), the secondary oxidation area (D) and the electrode coupling area (E), and the scum collecting tank (6) comprises a first collecting tank (C1) provided on the partition plate (4) between the primary oxidation area (B) and the secondary oxidation area (D), a second collecting tank (C2) provided at the liquid level of the ammonia-nitrogen blow-off area (A) and a third collecting tank (C3) provided at the liquid level of the electrode coupling area (E); a scum discharge main pipe (15), each of the scum collecting tanks (6) is collected into the scum discharge main pipe (15) through a discharge pipeline; an electro-catalytic power supply (10) for providing direct current, the primary electro-catalytic oxidation device (3) and the secondary electro-catalytic oxidation device (5) are connected with the electro-catalytic power supply (10); an operation controller (11) connected with the electro-catalytic power supply (10); It also comprises a first suction pump (71) for pumping water from the secondary oxidation area (D) to the primary oxidation area (B), a second suction pump (72) for pumping water from the secondary oxidation area (D) to the water outlet finishing area (F), a third suction pump (73) and a fourth suction pump (74) for pumping water from the electrode coupling area (E) to the water outlet finishing area (F) for acid-base neutralization, and the fourth suction pump (74) is used to pump liquid out of the box (1); It also comprises an aeration device (9) for blowing off free ammonia, which comprises a perforated tubular aeration pipe (17) and a fan (13); the aeration pipe (17) is arranged at the bottom of the inner cavity of the ammonia-nitrogen blow-off area (A), and the end of the aeration pipe (17) is connected with the fan (13) through an air pipeline.

2. The high concentration urine purification processing tank according to claim 1, wherein The box (1) comprises an inner box and an outer box sleeved on the outer peripheral part of the inner box; The outer box is a metal material piece, and the inner box is a non-metal material piece.

3. The high concentration urine purification processing tank according to claim 1 or 2, characterized by The primary electro-catalytic oxidation device (3) comprises a first cathode electrode plate (31), a first anode electrode plate (32), a first ion exchange membrane device (33), a first fixing seat (34) and a fastener (35), and the first ion exchange membrane device (33) is fixed to the lower part of the partition plate (4) through the fastener (35); The first fixing seat (34) is arranged below the first ion exchange membrane device (33) and at the bottom of the ammonia nitrogen stripping area (A) and the primary oxidation area (B) to fix the first cathode electrode plate (31) and the first anode electrode plate (32).

4. The high concentration urine purification processing tank according to claim 3, characterized by The secondary electro-catalytic oxidation device (5) comprises a second cathode electrode plate (51), a second anode electrode plate (52), a second ion exchange membrane device (53), a second fixing seat (54) and a fastener (35), and the second ion exchange membrane device (53) is fixed to the lower part of the partition plate (4) through the fastener (35); The second fixing seat (54) is arranged below the second ion exchange membrane device (53) and at the bottom of the secondary oxidation area (D) and the electrode coupling area (E) to fix the second cathode electrode plate (51) and the second anode electrode plate (52).

5. The high concentration urine purification treatment tank according to claim 4, wherein The first cathode electrode plate (31) and the first anode electrode plate (32) are respectively located on the two sides of the first ion exchange membrane device (33), and the distance between the first cathode electrode plate (31) and the first anode electrode plate (32) is less than or equal to 30 mm, and the first cathode electrode plate (31) and the first anode electrode plate (32) are both spaced apart from the first ion exchange membrane device (33); The second cathode electrode plate (51) and the second anode electrode plate (52) are respectively located on the two sides of the second ion exchange membrane device (53), and the distance between the second cathode electrode plate (51) and the second anode electrode plate (52) is less than or equal to 30 mm, and the second cathode electrode plate (51) and the second anode electrode plate (52) are both spaced apart from the second ion exchange membrane device (53).

6. The high concentration urine purification processing tank according to claim 4, wherein The size of the second cathode electrode plate (51) is smaller than that of the first cathode electrode plate (31); The size of the second anode electrode plate (52) is smaller than that of the first anode electrode plate (32); The size of the second ion exchange membrane device (53) is smaller than that of the first ion exchange membrane device (33); The size of the second fixing seat (54) is smaller than that of the first fixing seat (34).

7. The high concentration urine purification processing tank according to claim 3, wherein The first ion exchange membrane device (33) comprises a first membrane fixing frame (331), a first cation exchange membrane (332), a first membrane pressing plate (333) and a tetrafluoro gasket (334); The first membrane pressing plate (333) clamps and fixes the first cation exchange membrane (332) in the first membrane fixing frame (331), and the four-fluorine gasket (334) is located outside the first membrane pressing plate (333) to press the separator (4) and the first ion exchange membrane device (33).

8. The high concentration urine purification processing tank according to claim 4, wherein The second ion exchange membrane device (53) comprises a second membrane fixing frame (531), a second cation exchange membrane (532) and a second membrane pressing plate (533). The second membrane pressing plate (533) clamps and fixes the second cation exchange membrane (532) in the second membrane fixing frame (531).

9. The high concentration urine purification processing tank according to claim 4, wherein The first cathode electrode plate (31), the first anode electrode plate (32), the second cathode electrode plate (51) and the second anode electrode plate (52) are all provided with a plurality of milky protrusions on the electrode plate.

10. The high concentration urine purification processing tank according to claim 4, characterized by The first anode electrode plate (32) and the second anode electrode plate (52) are both titanium-based metal pieces, and the first cathode electrode plate (31) and the second cathode electrode plate (51) are both stainless steel pieces.

11. The high concentration urine purification processing tank according to claim 1 or 2, characterized by The water outlet finishing area (F) is provided with a pH sensor (12) and a liquid level sensor (14), and the pH sensor (12) and the liquid level sensor (14) are connected with the operation controller (11).

12. The high concentration urine purification processing tank according to claim 1 or 2, characterized by Further comprising a dechlorination filler (16) for removing residual oxides in water, and the dechlorination filler (16) is arranged at the lower part of the water outlet finishing area (F).

Images