Novel multi-stage enhanced treatment device for high-salinity wastewater

Abstract

The utility model discloses a novel multi-stage enhanced treatment device for high-salinity wastewater, which comprises a water inlet pipe, a pretreatment unit, a physicochemical treatment unit, a biochemical treatment unit, a filter tank advanced treatment unit and a water outlet pipe which are sequentially connected, and the pretreatment unit comprises a sedimentation tank, an air floatation tank and an oil-water separator which are sequentially communicated; the filter tank advanced treatment unit comprises a multi-medium filter tank, an activated carbon filter tank and ion exchange resin which are communicated in sequence. According to the utility model, the pretreatment unit, the physicochemical treatment unit, the biochemical treatment unit and the filter tank advanced treatment unit are arranged, and organic matters and inorganic salts in the high-salinity wastewater are gradually removed in a multi-stage enhanced treatment mode, so that advanced purification and recycling of the wastewater are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of high-salt wastewater treatment, in particular to a novel high-salt wastewater multi-stage enhanced treatment device. Background Art

[0002] High-salinity wastewater refers to industrial wastewater containing high concentrations of inorganic salts and organic matter, mainly from the chemical, pharmaceutical, agricultural, coal chemical and other industries. High-salinity wastewater has the characteristics of complex composition, difficult to degrade, and great harm to the environment. If it is discharged directly without treatment, it will cause serious pollution of surface water, groundwater and soil, affecting ecological balance and human health. Therefore, the safe, economical and effective disposal of high-salinity wastewater has become a bottleneck problem restricting the development of related industries. Utility Model Content

[0003] The purpose of the utility model is to provide a novel high-salinity wastewater multi-stage enhanced treatment device to solve the problems mentioned in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides a novel high-salt wastewater multi-stage enhanced treatment device, which includes an inlet pipe, a pretreatment unit, a physicochemical treatment unit, a biochemical treatment unit, a filter tank deep treatment unit and an outlet pipe connected in sequence, the pretreatment unit includes a sedimentation tank, a flotation tank and an oil-water separator connected in sequence, and the filter tank deep treatment unit includes a multi-media filter, an activated carbon filter and an ion exchange resin connected in sequence.

[0005] Furthermore, the physicochemical treatment unit includes an advanced oxidation reactor and a first membrane separator which are connected in sequence.

[0006] Furthermore, the first membrane separator is a reverse osmosis membrane separator or an ultrafiltration membrane separator.

[0007] Furthermore, the biochemical treatment unit includes a microbial reactor and a second membrane separator.

[0008] Furthermore, the second membrane separator is an ultrafiltration membrane separator or a microfiltration membrane separator.

[0009] Furthermore, the pretreatment unit also includes a cleaning component, which includes a scraper, a connecting rod, a screw and a motor. The scraper is arranged inside the sedimentation tank and contacts the bottom surface of the sedimentation tank. The connecting rod is detachably connected to the scraper. The screw is rotatably connected to one side of the sedimentation tank. The screw is threadedly connected to the connecting rod. The motor is used to drive the screw to rotate.

[0010] Furthermore, the cleaning assembly also includes a mounting plate and a first cylinder, the mounting plate is threadedly connected to the lead screw, the cylinder body of the first cylinder is fixedly mounted on the mounting plate, and the piston rod of the first cylinder is fixedly connected to the connecting rod.

[0011] Furthermore, the cleaning assembly also includes a movable plate, a collecting box and a second cylinder. The movable plate is arranged below the mounting plate and is slidably connected to the top of the flotation pool. The collecting box is adapted to the flotation pool and is detachably connected to the movable plate. The cylinder body of the second cylinder is fixedly mounted on the mounting plate, and the piston rod of the second cylinder is fixedly connected to the movable plate.

[0012] The beneficial effects of the utility model are as follows: the utility model gradually removes organic matter and inorganic salts in high-salt wastewater by setting a pretreatment unit, a physicochemical treatment unit, a biochemical treatment unit and a filter tank deep treatment unit through a multi-stage enhanced treatment method, thereby achieving deep purification and resource utilization of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0014] Figure 2 It is a schematic diagram of the local structure of an embodiment of the utility model.

[0015] Figure 3 It is a partial cross-sectional structural schematic diagram of an embodiment of the utility model.

[0016] Figure 4 It is a schematic diagram of the process of an embodiment of the utility model.

[0017] Among them: 1. Water inlet pipe; 2. Pretreatment unit; 3. Physical and chemical treatment unit; 4. Biochemical treatment unit; 5. Filter tank deep treatment unit; 6. Water outlet pipe.

[0018] 21. Sedimentation tank; 22. Air flotation tank; 23. Oil-water separator; 24. Cleaning assembly; 31. Advanced oxidation reactor; 32. First membrane separator; 41. Microbial reactor; 42. Second membrane separator; 51. Multi-media filter; 52. Activated carbon filter; 53. Ion exchange resin;

[0019] 241. Scraper; 242. Connecting rod; 243. Lead screw; 244. Motor; 245. Mounting plate; 246. First cylinder; 247 Moving plate; 248. Collecting box; 249. Second cylinder. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiment is only one embodiment of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0021] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] In the following description, references to "one embodiment", "an embodiment", "an example", "an example", etc. indicate that the embodiment or example described in this way may include specific features, structures, characteristics, properties, elements or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.

[0023] like Figure 1-4 As shown, the utility model discloses a novel multi-stage enhanced treatment device for high-salinity wastewater, which includes an inlet pipe 1, a pretreatment unit 2, a physicochemical treatment unit 3, a biochemical treatment unit 4, a filter tank deep treatment unit 5 and an outlet pipe 6 which are connected in sequence. The pretreatment unit 2 includes a sedimentation tank 21, an air flotation tank 22 and an oil-water separator 23 which are connected in sequence, and is used to pretreat the high-salinity wastewater, remove impurities such as suspended matter and grease, reduce the concentration of organic matter, and improve the efficiency of subsequent treatment. In the sedimentation tank 21, the high-salinity wastewater is allowed to stand or flow slowly, so that solid particles or suspended matter in the wastewater are precipitated to the bottom to form sediment. Clear water flows out from the top or side of the pool. In the air flotation tank 22, fine bubbles are generated in the water by injecting air or other gases, and these bubbles are floated to the water surface together with the suspended matter in the wastewater to form scum. In the oil-water separator 23, the water and oil after stratification can be further separated and removed through different devices of the separator by utilizing the difference in specific gravity of oil and water in high-salt wastewater and the characteristics of certain viscosity and surface tension. The filter depth treatment unit 5 includes a multi-media filter 51, an activated carbon filter 52 and an ion exchange resin 53 which are connected in sequence. In the present embodiment, the multi-media filter 51 utilizes a variety of media such as quartz sand and coal to remove trace organic matter and chromaticity in the wastewater. The activated carbon filter 52 utilizes the adsorption effect of activated carbon to remove residual organic matter and chromaticity in the wastewater. The ion exchange resin 53 utilizes a cation exchange resin 53 and an anion exchange resin 53 to separate the remaining inorganic salts, thereby realizing the deep purification and resource utilization of the wastewater.

[0024] The utility model provides a pretreatment unit 2, a physicochemical treatment unit 3, a biochemical treatment unit 4 and a filter tank deep treatment unit 5, and gradually removes organic matter and inorganic salts in high-salt wastewater through a multi-stage enhanced treatment method, thereby achieving deep purification and resource utilization of wastewater.

[0025] In one embodiment, the physicochemical treatment unit 3 includes an advanced oxidation reactor 31 and a first membrane separator 32 which are connected in sequence. In this embodiment, the advanced oxidation reactor 31 uses oxidants such as ozone, ultraviolet rays, and hydrogen peroxide to generate hydroxyl radicals to oxidize and degrade refractory organic matter. The first membrane separator 32 separates part of the inorganic salts to reduce the salinity and COD of the wastewater.

[0026] In one embodiment, the first membrane separator 32 is a reverse osmosis membrane separator or an ultrafiltration membrane separator. The reverse osmosis membrane has a higher retention accuracy than the ultrafiltration membrane, so it is suitable for removing finer soluble solids and dissolved salts in water, while the ultrafiltration membrane is more suitable for removing macromolecular substances and turbid substances. The staff can choose according to the actual situation to reduce the salinity and COD of the wastewater.

[0027] In one embodiment, the biochemical treatment unit 4 includes a microbial reactor 41 and a second membrane separator 42. In the embodiment, the microbial reactor 41 uses aerobic or anaerobic microorganisms to degrade the remaining organic matter. The second membrane separator 42 separates part of the inorganic salts and microbial sludge to further reduce the salinity and COD of the wastewater.

[0028] In one embodiment, the second membrane separator 42 is an ultrafiltration membrane separator or a microfiltration membrane separator. The ultrafiltration membrane reactor is suitable for the separation of larger molecular substances and colloids, while the microfiltration membrane reactor is more suitable for the separation of smaller particles and dissolved substances.

[0029] In one embodiment, the pretreatment unit 2 further includes a cleaning assembly 24, which includes a scraper 241, a connecting rod 242, a lead screw 243 and a motor 244. The scraper 241 is arranged inside the sedimentation tank 21 and contacts the bottom surface of the sedimentation tank 21. The connecting rod 242 is detachably connected to the scraper 241. The lead screw 243 is rotatably connected to one side of the sedimentation tank 21. The lead screw 243 is threadedly connected to the connecting rod 242. The motor 244 is used to drive the lead screw 243 to rotate. In an embodiment, a controller and a guide rod are also included. The controller is electrically connected to the motor 244. The controller is a prior art and is not described here. The guide rod is fixedly mounted on the other side of the sedimentation tank 21 and is slidably connected to the mounting plate 245.

[0030] That is, after the sedimentation tank 21 has been used for a long time, the sediment is easily adsorbed on the bottom of the sedimentation tank 21. At this time, the staff can use the controller to start the motor 244, and the motor 244 drives the screw 243 to rotate. The screw 243 drives the connecting rod 242 to move left and right, so that the scraper 241 moves left and right at the bottom of the sedimentation tank 21, and scrapes the sediment adsorbed on the bottom of the sedimentation tank 21 to the sewage outlet of the sedimentation tank 21.

[0031] In one embodiment, the cleaning assembly 24 also includes a mounting plate 245 and a first cylinder 246, the mounting plate 245 is threadedly connected to the lead screw 243, the cylinder body of the first cylinder 246 is fixedly mounted on the mounting plate 245, and the piston rod of the first cylinder 246 is fixedly connected to the connecting rod 242. The first cylinder 246 is electrically connected to the controller. When the scraper 241 is not in use, the scraper 241 is raised by the cylinder to prevent the scraper 241 from affecting the high-salinity wastewater treatment work, and to prevent the high-salinity wastewater from corroding the scraper 241 for a long time, affecting the service life of the scraper 241. At the same time, since the scraper 241 and the connecting rod 242 are detachably connected, different scrapers 241 can be replaced according to actual needs.

[0032] In one embodiment, the cleaning assembly 24 further includes a moving plate 247, a collecting box 248 and a second cylinder 249. The moving plate 247 is arranged below the mounting plate 245 and is slidably connected to the top of the flotation tank 22. The collecting box 248 is adapted to the flotation tank 22 and is detachably connected to the moving plate 247. The cylinder body of the second cylinder 249 is fixedly mounted on the mounting plate 245. The piston rod of the second cylinder 249 is fixedly connected to the moving plate 247. The second cylinder 249 is electrically connected to the controller. That is, the middle of the mounting plate 245 is connected to the lead screw 243, the first end of the mounting plate 245 is located above the sedimentation tank 21, and the second end of the mounting plate 245 is located above the flotation tank 22.

[0033] When the lead screw 243 rotates to drive the mounting plate 245 to move, the mounting plate 245 will drive the movable plate 247 to move, and then the second cylinder 249 is used to control the movable plate 247 to descend, so that the collecting box 248 is located in the flotation tank 22. The collecting box 248 can move with the mounting plate 245 to clean the scum on the water surface of the flotation tank 22. At the same time, the collecting box 248 and the movable plate 247 are detachably connected to facilitate the staff to clean the scum in the collecting box 248.

[0034] The workflow of this embodiment is as follows:

[0035] High-salinity wastewater is transported to the pretreatment unit 2 through the water inlet pipe 1. The unit includes a sedimentation tank 21, an air flotation tank 22 and an oil-water separator 23, which are used to remove impurities such as suspended matter and grease in the wastewater, reduce the concentration of organic matter, and improve the efficiency of subsequent treatment.

[0036] The effluent from the pretreatment unit 2 is transported to the physicochemical treatment unit 3 through a pipeline. The unit includes an advanced oxidation reactor 31 and a first membrane separator 32 for physicochemical treatment of the wastewater. The advanced oxidation reactor 31 uses oxidants such as ozone, ultraviolet rays, and hydrogen peroxide to generate hydroxyl radicals to oxidize and degrade refractory organic matter. The first membrane separator 32 uses a reverse osmosis membrane or a nanofiltration membrane to separate some inorganic salts to reduce the salinity and COD of the wastewater.

[0037] The effluent of the physicochemical treatment unit 3 is transported to the biochemical treatment unit 4 through a pipeline. The unit includes a microbial reactor 41 and a second membrane separator 42 for biochemical treatment of the wastewater. The microbial reactor 41 uses aerobic or anaerobic microorganisms to degrade the remaining organic matter. The second membrane separator 42 uses an ultrafiltration membrane or a microfiltration membrane to separate part of the inorganic salts and microbial sludge, further reducing the salinity and COD of the wastewater.

[0038] The effluent from the biochemical treatment unit 4 is transported to the filter deep treatment unit 5 through a pipeline. The unit includes a multi-media filter 51, an activated carbon filter 52 and an ion exchange resin 53, which are used to perform filter deep treatment on the wastewater. The multi-media filter 51 uses a variety of media such as quartz sand and coal to remove trace organic matter and color in the wastewater. The activated carbon filter 52 uses the adsorption effect of activated carbon to remove residual organic matter and color in the wastewater. The ion exchange resin 53 uses cation exchange resin and anion exchange resin to separate the remaining inorganic salts, thereby achieving deep purification and resource utilization of the wastewater. After passing through the filter deep treatment unit 5, the wastewater meets the national emission standards or reuse standards.

[0039] When it is necessary to clean the residual sediment at the bottom of the sedimentation tank 21 of the pretreatment unit 2, first use the controller to start the first cylinder 246 so that the scraper 241 contacts the bottom surface of the sedimentation tank 21, and then use the controller to start the motor 244 to drive the screw 243 to rotate, so that the mounting plate 245 moves left and right on the screw 243, thereby driving the scraper 241 to move along the bottom surface of the sedimentation tank 21 and scrape the residual sediment toward the sewage outlet of the sedimentation tank 21.

[0040] When it is necessary to clean the scum in the flotation pool 22, first use the controller to start the second cylinder 249 so that the collection box 248 is located in the flotation pool 22, and then use the controller to start the motor 244 to drive the screw 243 to rotate. When the screw 243 rotates and drives the mounting plate 245 to move, the mounting plate 245 will drive the movable plate 247 to move. At this time, the collection box 248 can move with the mounting plate 245 to clean the scum on the water surface of the flotation pool 22. At the same time, the collection box 248 and the movable plate 247 are detachably connected to facilitate the staff to clean the scum in the collection box 248.

[0041] The utility model provides a pretreatment unit 2, a physicochemical treatment unit 3, a biochemical treatment unit 4 and a filter tank deep treatment unit 5, and gradually removes organic matter and inorganic salts in high-salt wastewater through a multi-stage enhanced treatment method, thereby achieving deep purification and resource utilization of wastewater.

[0042] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new type of multi-stage enhanced treatment device for high-salinity wastewater, characterized by: It includes a water inlet pipe, a pretreatment unit, a physicochemical treatment unit, a biochemical treatment unit, a filter tank deep treatment unit and a water outlet pipe which are connected in sequence. The pretreatment unit includes a sedimentation tank, a flotation tank and an oil-water separator which are connected in sequence. The filter tank deep treatment unit includes a multi-media filter, an activated carbon filter and an ion exchange resin which are connected in sequence.

2. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 1, characterized in that: The physicochemical treatment unit comprises an advanced oxidation reactor and a first membrane separator which are connected in sequence.

3. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 2, characterized in that: The first membrane separator is a reverse osmosis membrane separator or an ultrafiltration membrane separator.

4. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 1, characterized in that: The biochemical treatment unit includes a microbial reactor and a second membrane separator.

5. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 4, characterized in that: The second membrane separator is an ultrafiltration membrane separator or a microfiltration membrane separator.

6. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 1, characterized in that: The pretreatment unit also includes a cleaning component, which includes a scraper, a connecting rod, a screw and a motor. The scraper is arranged inside the sedimentation tank and contacts the bottom surface of the sedimentation tank. The connecting rod is detachably connected to the scraper. The screw is rotatably connected to one side of the sedimentation tank. The screw is threadedly connected to the connecting rod. The motor is used to drive the screw to rotate.

7. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 6, characterized in that: The cleaning assembly also includes a mounting plate and a first cylinder, wherein the mounting plate is threadedly connected to the lead screw, a cylinder body of the first cylinder is fixedly mounted on the mounting plate, and a piston rod of the first cylinder is fixedly connected to the connecting rod.

8. A novel high-salinity wastewater multi-stage enhanced treatment device according to claim 7, characterized in that: The cleaning assembly also includes a movable plate, a collecting box and a second cylinder. The movable plate is arranged below the mounting plate and is slidably connected to the top of the flotation pool. The collecting box is adapted to the flotation pool and is detachably connected to the movable plate. The cylinder body of the second cylinder is fixedly mounted on the mounting plate, and the piston rod of the second cylinder is fixedly connected to the movable plate.

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