Organic wastewater evaporation crystallization bypass advanced oxidation device
Patent Information
- Application Number
- CN202522507872.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-26
AI Technical Summary
[0003]但是，由于常规的蒸发结晶是一个纯物理过程，废水中的水和盐分在蒸发结晶过程中，只有温度变化和相变化的过程
1、本实用新型在蒸发结晶系统上设置旁路氧化装置，在废水加热蒸发的同时，分流部分废水进行氧化分解，降低其中有机物含量，避免废水蒸发浓缩后，有机物含量过高造成粘度升高，影响设备运行；
Smart Images
Figure CN224869873U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an advanced oxidation device for evaporation crystallization bypass of organic wastewater. Background Technology
[0002] Evaporation crystallization is a commonly used wastewater treatment method. It refers to the process of separating the solvent from the solute in a solution by raising the temperature, ultimately causing the solute to polymerize into a solid (crystal). In wastewater treatment projects, evaporation crystallization is often used to treat high-salinity wastewater, achieving zero wastewater discharge while simultaneously recovering water resources and salts from the wastewater, ultimately achieving the goals of resource recovery, volume reduction, and harmless treatment of wastewater.
[0003] However, since conventional evaporation crystallization is a purely physical process, the water and salt in wastewater only undergo temperature changes and phase changes during the evaporation crystallization process.
[0004] In existing technologies, for wastewater containing a large amount of organic matter entering the evaporation crystallization system, the organic matter is simultaneously concentrated during the continuous concentration process of evaporation crystallization. The concentrated organic matter causes the viscosity of the wastewater to increase several times and increases the boiling point temperature of the wastewater. The increased viscosity leads to the generation of a large amount of foam in the evaporator crystallizer, which on the one hand deteriorates the quality of the distilled water and on the other hand reduces the evaporation efficiency. In addition, a large amount of organic matter will also generate scale and scale on the inner wall of the evaporator crystallizer, reducing its heat exchange efficiency, affecting the normal operation of evaporation crystallization, and increasing the difficulty of operation and management of evaporation crystallization. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an advanced oxidation device for organic wastewater evaporation and crystallization bypass.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: An advanced oxidation device for evaporation crystallization of organic wastewater includes a separator and a heater. The separator is connected to a low-pressure steam pipe, a discharge pipe, and a feed pipe. A discharge circulation pump is connected to the bottom of the separator, and a three-way ball valve is connected to the outlet of the discharge circulation pump. The two outlets of the three-way ball valve are respectively connected to a circulating low-temperature pipe and a bypass oxidation pipe. The circulating low-temperature pipe is connected to the bottom of the heater, and the upper part of the heater is connected to the separator through a circulating high-temperature pipe. A bubble generator is connected to the bypass oxidation pipe, and the outlet of the bubble generator is connected to an oxidation reaction tank through a pipe. The upper part of the oxidation reaction tank is connected to the separator through a pipe, and a steam recovery pipe is connected to the top of the oxidation reaction tank. The low-pressure steam pipe and the steam recovery pipe are connected to a compressor through a three-way connector. A heat exchange tube is provided inside the heater, and the heat exchange tube is connected to the compressor through a high-pressure steam pipe.
[0007] Preferably, control valves are installed on the discharge pipe and the feed pipe respectively, and the feed pipe is located on the upper side of the discharge pipe.
[0008] Preferably, the heater has a heat exchange cavity inside, the heat exchange tube is disposed inside the heat exchange cavity, the heater has an insulation layer outside, and the circulating high-temperature tube and the circulating low-temperature tube are both connected to the heat exchange cavity.
[0009] Preferably, the lower end of the heat exchange tube penetrates the side wall of the heater and is connected to a steam outlet, and a steam trap is provided on the steam outlet.
[0010] Preferably, the bubble generator has an air inlet on one side, the oxidation reaction tank is equipped with a heating device, and the pipeline connecting the oxidation reaction tank and the separator is equipped with a reflux control valve.
[0011] Preferably, the steam recovery pipe is equipped with a steam control valve, and the low-pressure steam pipe, the steam recovery pipe and the high-pressure steam pipe are covered with heat insulation covers.
[0012] Preferably, the three-way ball valve is replaced with a three-way diverter valve.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model sets up a bypass oxidation device on the evaporation crystallization system. While the wastewater is heated and evaporated, a portion of the wastewater is diverted for oxidation and decomposition to reduce the organic matter content. This avoids the high viscosity caused by excessive organic matter content after the wastewater is evaporated and concentrated, which would affect the operation of the equipment. 2. This utility model utilizes a compressor to recover and compress the steam generated by the evaporation and oxidation reaction of wastewater for wastewater heating, thereby improving heat utilization efficiency and reducing energy consumption. At the same time, a steam trap is installed on the steam outlet to prevent steam from escaping and draining water, ensuring that the heat exchange tubes of the heater deliver heat evenly. Attached Figure Description
[0014] Figure 1 This is a first-view three-dimensional structural diagram of an advanced oxidation device for evaporation crystallization bypass of organic wastewater proposed in this utility model. Figure 2 This is a second-view three-dimensional structural diagram of an advanced oxidation device for evaporation crystallization bypass of organic wastewater proposed in this utility model. Figure 3 This is a schematic diagram illustrating the working principle of an advanced oxidation device for evaporation and crystallization of organic wastewater proposed in this utility model.
[0015] In the diagram: 1. Separator; 11. Low-pressure steam pipe; 12. Discharge circulation pump; 13. Three-way ball valve; 14. Discharge pipe; 15. Feed pipe; 2. Oxidation reactor; 21. Steam recovery pipe; 22. Steam control valve; 23. Heating device; 3. Bubble generator; 31. Air inlet; 32. Bypass oxidation pipe; 4. Heater; 41. High-pressure steam pipe; 42. Circulating high-temperature pipe; 43. Circulating low-temperature pipe; 44. Steam outlet; 5. Compressor. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0017] Reference Figure 1-3 An advanced oxidation device for evaporation crystallization of organic wastewater includes a separator 1 and a heater 4. The separator 1 and the heater 4 form an externally heated evaporator. The separator 1 is connected to a low-pressure steam pipe 11, a discharge pipe 14 and a feed pipe 15. Control valves are installed on the discharge pipe 14 and the feed pipe 15 respectively. The feed pipe 15 is located above the discharge pipe 14 and is used to add the organic wastewater to be treated. The discharge pipe 14 discharges the concentrated liquid after evaporation crystallization and oxidation treatment. Separator 1 is connected to a discharge circulation pump 12 at the bottom. The outlet of discharge circulation pump 12 is connected to a three-way ball valve 13. The two outlets of the three-way ball valve 13 are respectively connected to a circulating low-temperature pipe 43 and a bypass oxidation pipe 32. The three-way ball valve 13 is used to switch between the heating pipe or the oxidation pipe to achieve multi-functional wastewater treatment. In addition, the three-way ball valve 13 can be replaced by a three-way diverter valve to enable the heating pipeline and the oxidation pipeline to work simultaneously, diverting the evaporating and heated wastewater in a certain proportion and sending it into the oxidation pipeline to decompose the organic matter in the wastewater through oxidation reaction. Heating pipeline: The circulating low temperature pipe 43 is connected to the bottom of the heater 4. The heater 4 has a heat exchange chamber inside and an insulation layer outside. The upper part of the heater 4 is connected to the separator 1 through the circulating high temperature pipe 42. Both the circulating high temperature pipe 42 and the circulating low temperature pipe 43 are connected to the heat exchange chamber. Wastewater is fed into the heater 4 for heating and evaporated and crystallized in the separator 1. Oxidation Piping: A bypass oxidation pipe 32 is connected to a bubble generator 3. To improve the oxidation effect, a micro-nano bubble generator can be used. The bubble generator 3 has an air inlet 31 on one side for introducing an oxidant, such as ozone. Hydrogen peroxide can also be used as needed. The corresponding bubble generator 3 is replaced by a liquid mixer. The outlet of the bubble generator 3 is connected to an oxidation reaction tank 2 through a pipe. Wastewater mixed with oxidant is introduced into the oxidation reaction tank 2 for oxidation reaction to decompose the organic matter. The oxidation reaction tank 2 is equipped with a heating device 23 to quickly heat the wastewater when the equipment starts working to ensure the oxidation effect. After working for a period of time, the temperature of the wastewater in the oxidation reaction tank 2 rises, and the heating device 23 can be turned off to reduce energy consumption. The upper part of the oxidation reaction tank 2 is connected to the separator 1 through a pipe. The treated wastewater is reintroduced into the separator 1 for evaporation. A reflux control valve is provided on the pipe connecting the oxidation reaction tank 2 and the separator 1 to control the wastewater flow rate. The top of the oxidation reactor 2 is connected to a steam recovery pipe 21 for recovering the heat of the steam and reducing energy consumption. A steam control valve 22 is installed on the steam recovery pipe 21. The low-pressure steam pipe 11 and the steam recovery pipe 21 are connected to a compressor 5 through a three-way connector. The steam is compressed by the mechanical compressor to increase its pressure and temperature, thereby realizing the recycling of steam energy. The heat exchange chamber of the heater 4 is equipped with a heat exchange tube, which transfers the heat of the steam to the wastewater. The heat exchange tube is connected to the compressor 5 through a high-pressure steam pipe 41. The lower end of the heat exchange tube penetrates the side wall of the heater 4 and is connected to a steam outlet 44. A steam trap is installed on the steam outlet 44 to automatically remove steam condensate and non-condensable gases such as air, and prevent steam leakage. The low-pressure steam pipe 11, the steam recovery pipe 21 and the high-pressure steam pipe 41 are covered with a heat insulation cover to reduce heat loss.
[0018] In this embodiment, the wastewater to be treated is added to the separator 1 through the feed pipe 15. At this time, the temperature of the wastewater is not high. Therefore, the outlet of the three-way ball valve 13 or the three-way diverter valve to the side of the bypass oxidation pipe 32 is opened. The wastewater is sent out through the discharge circulation pump 12, passes through the bubble generator 3, mixes with the oxidant, and is sent into the oxidation reaction tank 2. The heating device 23 heats the wastewater to improve the efficiency of the oxidation reaction until the oxidation heats up and reaches a sufficient temperature. Then the heating device 23 is turned off, and the oxidized wastewater flows back to the separator 1 from the top of the oxidation reaction tank 2. After multiple cycles, the temperature inside the oxidation reaction tank 2 and separator 1 rises, generating steam. This steam is pressurized by the compressor 5 and fed into the heat exchange tubes to heat the heater 4. Simultaneously, the three-way ball valve 13 or the three-way diverter valve opens one outlet of the circulating low-temperature pipe 43, allowing wastewater to flow into the heat exchange chamber. The wastewater is then heated through the heat exchange tubes. The heated wastewater flows back to the separator 1 through the circulating high-temperature pipe 42 to increase the wastewater temperature and ensure evaporation efficiency. Finally, the concentrated liquid is discharged from the discharge pipe 14. A three-way ball valve 13 can be used to switch between the heating pipeline and the oxidation pipeline at a time, or a three-way diverter valve can be used to distribute the flow of the heating pipeline and the oxidation pipeline in proportion, so that heating and oxidation can work simultaneously, decompose the organic matter in the wastewater, and finally evaporate and crystallize.
[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
Claims
1. An advanced oxidation device for evaporation crystallization bypass of organic wastewater, comprising a separator (1) and a heater (4), characterized in that, The separator (1) is connected to a low-pressure steam pipe (11), a discharge pipe (14) and a feed pipe (15). The bottom of the separator (1) is connected to a discharge circulation pump (12). The outlet of the discharge circulation pump (12) is connected to a three-way ball valve (13). The two outlets of the three-way ball valve (13) are respectively connected to a circulating low-temperature pipe (43) and a bypass oxidation pipe (32). The circulating low-temperature pipe (43) is connected to the bottom of the heater (4). The upper part of the heater (4) is connected to the separator (1) through a circulating high-temperature pipe (42). The bypass oxidation pipe (32) is connected to a bubble generator (3). The outlet of the bubble generator (3) is connected to an oxidation reaction tank (2) through a pipe. The upper part of the oxidation reaction tank (2) is connected to the separator (1) through a pipe. The top of the oxidation reaction tank (2) is connected to a steam recovery pipe (21). The low-pressure steam pipe (11) and the steam recovery pipe (21) are connected to a compressor (5) through a three-way connector. The heater (4) is equipped with a heat exchange pipe. The heat exchange pipe is connected to the compressor (5) through a high-pressure steam pipe (41).
2. The advanced oxidation device for evaporation crystallization bypass of organic wastewater according to claim 1, characterized in that, Control valves are installed on the discharge pipe (14) and the feed pipe (15), respectively, and the feed pipe (15) is located on the upper side of the discharge pipe (14).
3. The advanced oxidation device for evaporation crystallization bypass of organic wastewater according to claim 1, characterized in that, The heater (4) has a heat exchange cavity inside, the heat exchange tube is located inside the heat exchange cavity, the heater (4) has an insulation layer outside, and the circulating high temperature tube (42) and circulating low temperature tube (43) are both connected to the heat exchange cavity.
4. The advanced oxidation device for evaporation crystallization bypass of organic wastewater according to claim 3, characterized in that, The lower end of the heat exchange tube penetrates the side wall of the heater (4) and is connected to a steam outlet (44), on which a steam trap is provided.
5. The advanced oxidation device for evaporation crystallization bypass of organic wastewater according to claim 1, characterized in that, The bubble generator (3) has an air inlet (31) on one side, the oxidation reaction tank (2) is equipped with a heating device (23), and the connection pipe between the oxidation reaction tank (2) and the separator (1) is equipped with a reflux control valve.
6. The advanced oxidation device for evaporation crystallization bypass of organic wastewater according to claim 5, characterized in that, A steam control valve (22) is provided on the steam recovery pipe (21), and a heat insulation cover is provided on the outside of the low-pressure steam pipe (11), the steam recovery pipe (21) and the high-pressure steam pipe (41).
7. An advanced oxidation device for evaporation crystallization bypass of organic wastewater according to any one of claims 1 to 6, characterized in that, The three-way ball valve (13) is replaced with a three-way diverter valve.