Device for concentrating glufosinate-ammonium phosphorus-containing wastewater

Abstract

The utility model discloses a device for concentrating glufosinate-ammonium phosphorus-containing wastewater, and belongs to the technical field of wastewater treatment. The device comprises a feeding tank, two ends of the feeding tank are respectively connected with a feeding pipeline and a heat exchanger, the heat exchanger is connected with a filter, and the filter is connected with a plurality of membrane systems; each set of membrane system is provided with a concentrated solution outlet and a dialysate outlet, the concentrated solution outlets are connected with the evaporation system, all the dialysate outlets are connected with the first pipeline, the first pipeline is provided with two outlets, and one outlet is connected with the biochemical pool; and the other outlet is connected with the cleaning tank which is connected with the filter and the feeding pipeline. By using the device, the wastewater concentration efficiency can be improved, and the influence on the environment is reduced; and the membrane system can be cleaned on line and does not need to be disassembled, so that the energy consumption and the operation cost in the wastewater treatment process are remarkably reduced. The device is suitable for treating wastewater with high phosphorus content, high salt content and the like in the industries of chemical engineering, pharmacy and the like.

Description

Technical Field

[0001] The utility model patent relates to the technical field of wastewater treatment, and specifically to a device for concentrating phosphorus-containing wastewater containing glufosinate ammonium. Background Art

[0002] Wastewater with high phosphorus and salt content usually comes from the chemical and pharmaceutical industries. During the production and processing of glufosinate ammonium, a large amount of wastewater and waste alkali liquor and other industrial wastes are generated. These wastewaters contain a variety of organic matter. If they are directly discharged without effective treatment, they will cause serious pollution to the environment.

[0003] In order to treat high-phosphorus and high-salt wastewater, my country's scientific research institutions and chemical companies have carried out a series of studies, mainly focusing on wastewater recycling, wastewater treatment methods and the development of related equipment and technology. In the face of large-scale wastewater treatment challenges, traditional distillation technology is not ideal due to high energy consumption and expensive operating costs. In this context, achieving a significant reduction in wastewater volume has become a crucial link. Therefore, it is necessary to design a device to concentrate glufosinate-ammonium phosphorus-containing wastewater. Utility Model Content

[0004] The utility model provides a device for concentrating the glufosinate-ammonium phosphorus-containing wastewater in order to solve the problems of high energy consumption and high cost in the prior art for treating the glufosinate-ammonium phosphorus-containing wastewater.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model provides a device for concentrating phosphorus-containing wastewater of glufosinate ammonium, comprising a feed tank, a heat exchanger, a filter, a membrane system and a cleaning tank;

[0007] The inlet of the feed tank is connected to the feed pipeline, the outlet of the feed tank is connected to the inlet of the feed pump, the outlet of the feed pump is connected to the inlet of the heat exchanger, the outlet of the heat exchanger is connected to the inlet of the filter, and the outlet of the filter is connected to the inlets of several membrane systems; each membrane system is provided with a concentrated liquid outlet and a dialysate outlet, the concentrated liquid outlets of several membrane systems are connected to the evaporation system, and the dialysate outlets of several membrane systems are connected to the first pipeline, the first pipeline is provided with two outlets, one of the outlets of the first pipeline is connected to the biochemical pool, and the other outlet of the first pipeline is connected to the inlet of the cleaning tank, the outlet of the cleaning tank is connected to the inlet of the cleaning pump, and the outlet of the cleaning pump is connected to the inlet of the filter and the feed pipeline.

[0008] Nanofiltration membranes are used in several membrane systems, and the nanofiltration membranes adopt a rolled membrane structure.

[0009] An online pH meter is installed in the feed tank.

[0010] The heat exchanger adopts a cooling water heat exchange system, and a thermometer is set at the inlet of the heat exchanger.

[0011] Booster pumps are installed at the inlets of several membrane systems.

[0012] An inner coil type steam pipe is provided in the cleaning tank.

[0013] The feed pump, booster pump and cleaning pump are all equipped with control systems, and the control systems are equipped with frequency conversion controllers.

[0014] Connect the cleaning tank to the deionized water line.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a device for concentrating phosphorus-containing wastewater containing glufosinate ammonium. The pH value of the wastewater is adjusted by a feed tank, and then the wastewater is cooled and filtered by a heat exchanger and a filter. After the wastewater is sent to the membrane system, it is filtered and concentrated by the membrane, and the concentrated liquid goes to the evaporation system. A part of the dialysate directly enters the biochemical pool, and the other part is rinsed and cleaned by the cleaning tank to clean the membrane system. The use of this device can improve the wastewater concentration efficiency and reduce the wastewater treatment volume; reduce the volatilization and emission of organic solvents and reduce the impact on the environment; significantly reduce the energy consumption and operating costs in the wastewater treatment process; and can also clean the membrane system online without disassembly of the membrane system, reducing the maintenance cost of the device. The overall device has the advantages of energy saving, high efficiency and environmental protection, and is suitable for the treatment of high-phosphorus and high-salt wastewater in the chemical, pharmaceutical and other industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a device for concentrating phosphorus-containing wastewater containing glufosinate ammonium according to the utility model;

[0019] Among them: 1. Feed tank; 2. Heat exchanger; 3. Filter; 4. Membrane system; 5. Feed pump; 6. Booster pump; 7. Cleaning tank; 8. Evaporation system; 9. Biochemical pool; 10. Cleaning pump; 11. First pipeline. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The utility model is further described in detail below with reference to the accompanying drawings:

[0027] like Figure 1 As shown, a device for concentrating phosphorus-containing wastewater containing glufosinate ammonium includes a feed tank 1, a heat exchanger 2, a filter 3, a membrane system 4 and a cleaning tank 7; the inlet of the feed tank is connected to the feed pipeline, the outlet of the feed tank 1 is connected to the inlet of the feed pump 5, the outlet of the feed pump 5 is connected to the inlet of the heat exchanger 2, the outlet of the heat exchanger 2 is connected to the inlet of the filter 3, the outlet of the filter 3 is connected to the inlet of several booster pumps 6, the outlet of each booster pump 6 is connected to the inlet of a membrane system 4, each membrane system 4 is provided with a concentrated liquid outlet and a dialysate outlet, the concentrated liquid outlets of several membrane systems 4 are all connected to the evaporation system 8, the dialysate outlets of several membrane systems 4 are all connected to the first pipeline 11, the first pipeline 11 is provided with two outlets, one of the outlets of the first pipeline 11 is connected to the biochemical pool 9, the other outlet of the first pipeline 11 is connected to the inlet of the cleaning tank 7, the outlet of the cleaning tank 7 is connected to the inlet of the cleaning pump 10, and the outlet of the cleaning pump 10 is connected to the inlet of the filter 3 and the feed pipeline. The feed tank 1, the heat exchanger 2, the filter 3 and the cleaning tank 7 are all arranged at the same height, and there is a certain height difference between the membrane system 4 and other equipment.

[0028] This device adjusts the pH of wastewater in the feed pipeline, and then uses a heat exchanger and a filter to cool and filter the wastewater. After the wastewater is sent to the membrane system, it is filtered and concentrated by the membrane, and the concentrated liquid goes to the evaporation system. Part of the dialysate goes directly into the biochemical pool, and the other part is used to flush and clean the membrane system through the cleaning tank. The use of this device can improve the wastewater concentration efficiency and reduce the amount of wastewater treatment; reduce the volatilization and emission of organic solvents, and reduce the impact on the environment; significantly reduce the energy consumption and operating costs in the wastewater treatment process; and can also clean the membrane system online without disassembling the membrane system, reducing the maintenance cost of the device. The overall device has the advantages of energy saving, high efficiency, and environmental protection, and is suitable for the treatment of high-phosphorus and high-salt wastewater in the chemical, pharmaceutical and other industries.

[0029] The membrane system 4 uses a nanofiltration membrane, which adopts a roll-type membrane structure. The nanofiltration membrane has high anti-pollution performance and improves the service life of the equipment; the nanofiltration membrane adopts a roll-type membrane structure, which can improve the concentration effect.

[0030] An online pH meter is installed in the feed tank 1 to monitor the pH of the wastewater in the feed tank 1 in real time. The heat exchanger 2 adopts a cooling water heat exchange system. A thermometer is installed at the inlet of the heat exchanger 2 to ensure the subsequent treatment process of the wastewater by monitoring and controlling the pH and temperature.

[0031] The cleaning tank 7 is provided with an inner coil steam pipe; the steam pipe is provided with the following functions: first, the temperature can be effectively controlled by steam; second, the steam can be thermally sterilized, and the required steam temperature is 120-150°C and the pressure is 2-5bar.

[0032] The feed pump 5, the booster pump 6 and the cleaning pump 10 are all provided with a control system; the control system is equipped with a frequency conversion controller, which can realize the flexible start and shutdown of the device, avoiding the impact and damage of the pipeline system and the nanofiltration membrane during start and shutdown; different operating frequencies are set by the control system under different working conditions to achieve the optimal working pressure; the control system automatically adjusts the operating frequency according to the operating pressure to achieve constant pressure operation.

[0033] The cleaning tank 7 is connected to a deionized water pipeline, which can be used as a backup water source to supply water for the cleaning and rinsing processes.

[0034] The phosphorus-containing wastewater from the workshop contains ammonia nitrogen and organic solvents, and the pH is above 11. The above device is used to treat the wastewater. The wastewater is adjusted to pH 5-6 by adding sulfuric acid in the feed pipeline. The online pH meter in the feed tank 1 is monitored in real time. The feed pump 5 is used to transport the wastewater to the heat exchanger 2. The cooling water heat exchange system of the heat exchanger 2 is used for heat exchange. The cooling water is 7°C water. The thermometer monitors the temperature in real time to control the temperature of the wastewater. The wastewater is then sent to the filter 3 for filtration. The booster pump 6 is used to transport the wastewater to the membrane system 4. After being concentrated 5 times by the nanofiltration membrane of the membrane system 4, the concentrate flows into the evaporation system 8 through the concentrate outlet. A portion of the dialysate directly enters the biochemical pool 9 through the dialysate outlet, and the other portion enters the cleaning tank 7 as a cleaning liquid. The cleaning liquid is transported to the filter 3 by the cleaning pump 10 for filtration and then enters the membrane system 4 for flushing and cleaning.

[0035] When the water output of the membrane system 4 decreases or the operating pressure increases, it is automatically cleaned. The cleaning of the membrane system 4 is generally carried out by flushing first and then cleaning. The membrane system 4 is first flushed with dialysate as the cleaning liquid, and then enters the biochemical pool 9. The main purpose of flushing is to remove the pollutants in the wastewater from the deposition on the membrane surface; then the membrane system 4 is chemically cleaned, and after several cycles of sufficient cleaning, the cleaning liquid of the chemical cleaning is circulated back to the cleaning tank 7 and enters the feed line. The cleaning agent includes acidic cleaning agent and alkaline cleaning agent. The main function of the alkaline cleaning agent is to remove organic pollution, and the main function of the acidic cleaning agent is to remove inorganic pollution; steam is used for thermal disinfection when necessary.

[0036] This device for concentrating phosphorus-containing wastewater containing glufosinate ammonium can process 100m3 of liquid per batch. 3 , processing time is 20h per day.

[0037] Example 1

[0038] The device for concentrating glufosinate-ammonium phosphorus-containing wastewater in this embodiment comprises a feed tank 1, a heat exchanger 2, a filter 3, a membrane system 4 and a cleaning tank 7; the inlet of the feed tank is connected to the feed pipeline, the outlet of the feed tank 1 is connected to the inlet of the feed pump 5, the outlet of the feed pump 5 is connected to the inlet of the heat exchanger 2, the outlet of the heat exchanger 2 is connected to the inlet of the filter 3, the outlet of the filter 3 is connected to the inlet of two booster pumps 6, the outlet of each booster pump 6 is connected to the inlet of a membrane system 4, each membrane system 4 is provided with a concentrated liquid outlet and a dialysate outlet, the concentrated liquid outlets of the two membrane systems 4 are connected to the evaporation system 8, the dialysate outlets of the two membrane systems 4 are connected to the first pipeline 11, the first pipeline 11 is provided with two outlets, one of the outlets of the first pipeline 11 is connected to the biochemical pool 9, the other outlet of the first pipeline 11 is connected to the inlet of the cleaning tank 7, the outlet of the cleaning tank 7 is connected to the inlet of the cleaning pump 10, and the outlet of the cleaning pump 10 is connected to the inlet of the filter 3 and the feed pipeline.

[0039] The membrane system 4 selects a nanofiltration membrane, and the nanofiltration membrane adopts a roll membrane structure; an online pH meter is arranged in the feed tank 1, the heat exchanger 2 adopts a cooling water heat exchange system, a thermometer is arranged at the inlet of the heat exchanger 2, and an inner coil steam pipe is arranged in the cleaning tank 7; the feed pump 5, the booster pump 6 and the cleaning pump 10 are all provided with a control system, and the control system is equipped with a frequency conversion controller.

[0040] The device of this embodiment is used; the phosphorus-containing wastewater from the workshop has an initial pH of 11.1, a TDS content of 726 mg / L, and a phosphorus content of 27.12 mg / L; after the wastewater enters the feed pipeline, sulfuric acid is added to adjust the pH to 5.1 and then transported to the feed tank 1, and the feed pump 5 is used to transport the wastewater to the heat exchanger 2, the temperature is adjusted by the heat exchanger 2, and then the wastewater enters the membrane system 4 after preliminary filtration by the filter 3. After being concentrated 5 times by the nanofiltration membrane, the dialysate pH is 6.78, the TDS content is 230 mg / L, and the phosphorus content is less than 1 mg / L, which meets the standard for entering the biochemical pool; the concentrated solution has a pH of 5.06, a TDS content of 85670 mg / L, and a phosphorus content of 240.08 mg / L, and the concentrated solution enters the evaporation system 8.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A device for concentrating phosphorus-containing wastewater containing glufosinate ammonium, characterized in that: It comprises a feed tank (1), a heat exchanger (2), a filter (3), a membrane system (4) and a cleaning tank (7); The inlet of the feed tank is connected to the feed pipeline, the outlet of the feed tank (1) is connected to the inlet of the feed pump (5), the outlet of the feed pump (5) is connected to the inlet of the heat exchanger (2), the outlet of the heat exchanger (2) is connected to the inlet of the filter (3), and the outlet of the filter (3) is connected to the inlets of the plurality of membrane systems (4); each membrane system (4) is provided with a concentrated liquid outlet and a dialysate outlet, the concentrated liquid outlets of the plurality of membrane systems (4) are connected to the evaporation system (8), the dialysate outlets of the plurality of membrane systems (4) are connected to the first pipeline (11), the first pipeline (11) is provided with two outlets, one of the outlets of the first pipeline (11) is connected to the biochemical pool (9), and the other outlet of the first pipeline (11) is connected to the inlet of the cleaning tank (7), the outlet of the cleaning tank (7) is connected to the inlet of the cleaning pump (10), and the outlet of the cleaning pump (10) is connected to the inlet of the filter (3) and the feed pipeline.

2. A device for concentrating phosphorus-containing wastewater containing glufosinate ammonium according to claim 1, characterized in that: Nanofiltration membranes are used in several membrane systems (4), and the nanofiltration membranes adopt a roll-type membrane structure.

3. A device for concentrating phosphorus-containing wastewater containing glufosinate ammonium according to claim 1, characterized in that: An online pH meter is arranged in the feed tank (1).

4. The device for concentrating phosphorus-containing wastewater of glufosinate-ammonium according to claim 1, characterized in that: The heat exchanger (2) adopts a cooling water heat exchange system, and a thermometer is arranged at the inlet of the heat exchanger (2).

5. The device for concentrating phosphorus-containing wastewater of glufosinate ammonium according to claim 1, characterized in that: A booster pump (6) is provided at the inlet of each of the plurality of membrane systems (4).

6. The device for concentrating phosphorus-containing wastewater of glufosinate ammonium according to claim 1, characterized in that: An inner coil type steam pipeline is arranged in the cleaning tank (7).

7. A device for concentrating phosphorus-containing wastewater containing glufosinate ammonium according to any one of claims 1 or 5, characterized in that: The feed pump (5), the booster pump (6) and the cleaning pump (10) are all provided with a control system, and the control system is equipped with a frequency conversion controller.

8. The device for concentrating phosphorus-containing wastewater of glufosinate-ammonium according to claim 1, characterized in that: The cleaning tank (7) is connected to a deionized water pipeline.

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