Device for recovering organic matters in wastewater
By setting up a combination device of a primary cleaning tower, a secondary cleaning tower, a third cleaning tower, a coalescer and a red water separator, multiple cleaning and separation and recovery of organic matter in nitrification wastewater are achieved, and the problem of high organic matter content in nitrification wastewater is solved and the treatment cost is reduced.
Patent Information
- Application Number
- CN202422273634.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The content of organic matter in nitrification wastewater is high, resulting in higher treatment costs.
The combination device of a primary cleaning tower, a secondary cleaning tower, a third cleaning tower, a coalescer and a red water separator is used to reduce water resource consumption and organic matter content through multiple cleaning and separation.
Through multiple cleaning and separation, the organic content in nitrification wastewater is reduced, water resources are saved, and treatment costs are reduced.
Smart Images
Figure CN223210071U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of chemical production, and in particular relates to a device for recovering organic matter from waste water. Background Art
[0002] Dinitrotoluene (DNT) is a key raw material in the production of toluene diisocyanate (TDI). The crude DNT product, produced through the nitration reaction of toluene and nitric acid, contains a small amount of phenolate impurities. This phenolate can be removed by water washing. During this refining process, the resulting nitration wastewater is opaque, deep red, with high chroma and COD values, earning it the nickname "red water." The nitration reaction requires a large amount of water, generating a significant amount of nitration wastewater. This nitration wastewater contains nitrobenzenes, nitrophenols, and inorganic salts, with high levels of organic compounds such as nitrobenzenes and nitrophenols, leading to high treatment costs. Utility Model Content
[0003] The purpose of the utility model is to provide a wastewater organic matter recovery device, aiming to solve the problem of high organic matter content and high treatment cost in nitrification wastewater.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an organic matter recovery device in wastewater, comprising: a primary cleaning tower, a secondary cleaning tower, a tertiary cleaning tower, a coalescer and a red water separator, the primary cleaning tower being provided with a primary feeding pipe suitable for discharging DNT products, a first connecting pipe suitable for the flow of DNT products being provided between the primary cleaning tower and the secondary cleaning tower, a second connecting pipe suitable for the flow of DNT products being provided between the secondary cleaning tower and the tertiary cleaning tower, the coalescer being provided on the second connecting pipe, a tertiary discharge pipe suitable for discharging DNT products being provided on the tertiary cleaning tower, a separation pipe suitable for the flow of red water being provided between the tertiary cleaning tower and the red water separator, a red water return pipe suitable for returning red water to the secondary cleaning tower being provided between the tertiary cleaning tower and the secondary cleaning tower, the red water separator being further provided with a collection pipe suitable for discharging deposited DNT products, and the red water separator being further provided with a red water discharge pipe.
[0005] In one possible implementation, the red water separator includes a separation tank and a collection tank, the separation pipe and the red water discharge pipe are arranged on the separation tank, a collection pipe suitable for the flow of deposited DNT products is arranged between the separation tank and the collection tank, and the collection pipe is arranged on the collection tank.
[0006] In a possible implementation, a vertical drainage pipe is provided in the separation tank, the upper end of the drainage pipe is connected to the separation pipe, and the lower end of the drainage pipe is located at the lower end of the separation tank.
[0007] In a possible implementation, the red water discharge pipe is horizontally arranged to pass through the side wall of the upper end of the separation tank, and a filter is provided at one end of the red water discharge pipe located in the separation tank.
[0008] In a possible implementation, the outer side wall of the separation tank is provided with a heating component for heating.
[0009] In a possible implementation, the heating assembly includes an upper jacket heating component and a tower bottom coil heating component, and the upper jacket heating component and the tower bottom coil heating component are suitable for passing circulating water / circulating hot water.
[0010] In one possible implementation, a first observation mirror for observing the internal DNT product is provided at the lower end of the outer wall of the separation tank, and a second observation mirror for observing the internal DNT product is provided at the upper end of the outer wall of the collection tank.
[0011] In a possible implementation, an air inlet pipe suitable for introducing an external air source is provided at the upper end of the collection tank.
[0012] In a possible implementation, the collection pipe is connected to the secondary cleaning tower.
[0013] In a possible implementation, a coalescing and separating pipe suitable for the flow of red water is provided between the coalescer and the red water separator.
[0014] The beneficial effects of the wastewater organic matter recovery device provided by the utility model are:
[0015] Compared with the prior art, the present invention is provided with a primary cleaning tower, a secondary cleaning tower, a tertiary cleaning tower, a coalescer and a red water separator. The DNT product is discharged into the primary cleaning tower through a primary feeding pipe for primary cleaning and then into the secondary cleaning tower for secondary cleaning. The DNT product after the secondary cleaning and the red water enter the coalescer. The coalescer separates the DNT product. The separated DNT product enters the tertiary cleaning tower to wash away heavy metal salts and other impurities. The DNT product after the three washes is discharged from the tertiary cleaning tower. Part of the red water generated in the cleaning process of the tertiary cleaning tower is returned to the secondary cleaning tower, saving water resources. The remaining part of the red water generated in the cleaning process of the tertiary cleaning tower enters the red water separator. The red water separator separates and recovers organic matter in the red water, reducing the organic matter content in the nitrification wastewater finally discharged from the red water separator and reducing the treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 A schematic diagram of the structure of an organic matter recovery device for wastewater provided in an embodiment of the utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of the separation tank used in the embodiment of the present utility model.
[0019] In the figure: 1. Primary cleaning tower; 2. Secondary cleaning tower; 3. Tertiary cleaning tower; 4. Coalescer; 5. Primary feeding pipe; 6. First connecting pipe; 7. Second connecting pipe; 8. Tertiary discharge pipe; 9. Separation pipe; 10. Red water return pipe; 11. Separation tank; 12. Collection tank; 13. Collection pipe; 14. Red water discharge pipe; 15. Collection pipe; 16. Drainage pipe; 17. Filter; 18. Upper jacket heating component; 19. Middle jacket heating component; 20. Tower bottom coil heating component; 21. First observation mirror; 22. Second observation mirror; 23. Third observation mirror; 24. Air inlet pipe; 25. Coalescing and separation pipe; 26. Yellow water treatment system. DETAILED DESCRIPTION
[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0021] Please refer to Figure 1 as well as Figure 2A specific embodiment of a wastewater organic matter recovery device provided by the utility model is now described. The device includes: a primary cleaning tower 1, a secondary cleaning tower 2, a tertiary cleaning tower 3, a coalescer 4, and a red water separator. The primary cleaning tower 1 is provided with a primary feeding pipe 5 suitable for discharging DNT products. A first connecting pipe 6 suitable for the flow of DNT products is provided between the primary cleaning tower 1 and the secondary cleaning tower 2. A second connecting pipe 7 suitable for the flow of DNT products is provided between the secondary cleaning tower 2 and the tertiary cleaning tower 3. The coalescer 4 is provided on the second connecting pipe 7. A tertiary discharge pipe 8 suitable for discharging DNT products is provided on the tertiary cleaning tower 3. A separation pipe 9 suitable for the flow of red water is provided between the tertiary cleaning tower 3 and the red water separator. A red water return pipe 10 suitable for returning red water to the secondary cleaning tower 2 is provided between the tertiary cleaning tower 3 and the secondary cleaning tower 2. The red water separator is also provided with a collection pipe 13 suitable for discharging deposited DNT products. The red water separator is also provided with a red water discharge pipe 14.
[0022] The utility model provides a wastewater organic matter recovery device. Compared with the prior art, the device is provided with a primary cleaning tower 1, a secondary cleaning tower 2, a tertiary cleaning tower 3, a coalescer 4 and a red water separator. The DNT product is discharged into the primary cleaning tower 1 through a primary feeding pipe 5 for primary cleaning and then discharged into the secondary cleaning tower 2 for secondary cleaning. The DNT product after the secondary cleaning and the red water enter the coalescer 4. The coalescer 4 separates the DNT product. The separated DNT product enters the tertiary cleaning tower 3 to wash away heavy metal salts and other impurities. The DNT product after the three washes is discharged from the tertiary cleaning tower 3. Part of the red water generated in the cleaning process of the tertiary cleaning tower 3 is returned to the secondary cleaning tower 2, saving water resources. The remaining part of the red water generated in the cleaning process of the tertiary cleaning tower 3 enters the red water separator. The red water separator separates and recovers organic matter in the red water, reducing the organic matter content in the nitrification wastewater finally discharged from the red water separator and reducing the treatment cost.
[0023] For details, please refer to Figure 1 as well as Figure 2, including a primary cleaning tower 1, a secondary cleaning tower 2, a tertiary cleaning tower 3, a coalescer 4 and a red water separator, and connected by pipelines, the DNT product is discharged into the primary cleaning tower 1 through a primary feeding pipeline 5, and desalted water is added to the primary cleaning tower 1 as needed to perform a primary cleaning of the DNT product, and yellow water is obtained after the primary cleaning, and the yellow water enters the yellow water treatment system 26, and acidic condensate is obtained through the yellow water, and the acidic condensate returns to the primary cleaning tower 1 to wash away the inorganic acid contained in the DNT product in the primary cleaning tower 1, and the DNT product is discharged into the secondary cleaning tower 2 through a first connecting pipeline 6, and an alkaline washing solution (sodium carbonate solution can be used as the alkaline washing solution) is added to the secondary cleaning tower 2, and desalted water is added as needed to neutralize organic acids such as phenols, and the DNT product is discharged into the coalescer 4 through a second connecting pipeline 7, and the coalescer The device 4 separates the DNT product from the red water, and the separated DNT product is discharged into the tertiary washing tower 3. Desalted water is added to the secondary washing tower 2 for three washings to remove heavy metal salts and other impurities. The DNT product that has completed the three washings is discharged through the tertiary discharge pipe 8 and enters the DNT product storage tank. Part of the red water in the tertiary washing tower 3 is discharged into the red water separator through the separation pipe 9. The residual DNT product in the red water is removed from the red water in the red water separator. The DNT product accumulated in the red water separator is discharged through the collection pipe 13. The red water from which the DNT product is removed in the red water separator is discharged through the red water discharge pipe 14, thereby reducing the content of organic matter in the nitrification wastewater. The remaining red water in the tertiary washing tower 3 is returned to the secondary washing tower 2 through the red water return pipe 10, saving water resources and reducing treatment costs.
[0024] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 The red water separator includes a separation tank 11 and a collection tank 12. The separation pipe 9 and the red water discharge pipe 14 are arranged on the separation tank 11. A collection pipe 15 suitable for the flow of deposited DNT products is arranged between the separation tank 11 and the collection tank 12. The collection pipe 13 is arranged on the collection tank 12.
[0025] For details, please refer to Figure 1 as well as Figure 2 The red water separator includes a separation tank 11 and a collection tank 12. The separation pipe 9 is arranged at the upper end of the separation tank 11. Part of the red water in the tertiary cleaning tower 3 is discharged into the red water separator through the separation pipe 9. The red water discharge pipe 14 is arranged on the separation tank 11. The red water from the separation tank 11 that removes the DNT product is discharged through the red water discharge pipe 14. The DNT product is deposited at the bottom of the separation tank 11 and is discharged into the collection tank 12 through the collection pipe 15 arranged at the bottom of the separation tank 11. The DNT product in the collection tank 12 is discharged through the collection pipe 13.
[0026] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 A vertical drainage pipe 16 is provided in the separation tank 11 , the upper end of the drainage pipe 16 is connected to the separation pipe 9 , and the lower end of the drainage pipe 16 is located at the lower end of the separation tank 11 .
[0027] For details, please refer to Figure 1 as well as Figure 2 A drainage pipe 16 is provided in the separation tank 11. The drainage pipe 16 is vertically arranged. The separation pipe 9 passes through the upper top wall of the separation tank 11 and enters the separation tank 11. The upper end of the drainage pipe 16 is connected to the lower end of the separation pipe 9. The lower end opening of the drainage pipe 16 is located at the lower end of the internal space of the separation tank 11, which is convenient for the discharge of red water and the deposition of DNT products.
[0028] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 The red water discharge pipe 14 is horizontally arranged to pass through the side wall of the upper end of the separation tank 11, and a filter screen 17 is arranged at one end of the red water discharge pipe 14 located in the separation tank 11.
[0029] For details, please refer to Figure 1 as well as Figure 2 The red water discharge pipe 14 is arranged horizontally, and the first end of the red water discharge pipe 14 passes through the side wall of the upper end of the separation tank 11 and is located inside the separation tank 11. The filter screen 17 is arranged at the first end of the red water discharge pipe 14. The filter screen 17 is funnel-shaped. The filtered red water on the upper layer is discharged from the separation tank 11 through the red water discharge pipe 14, reducing the DNT product condensed and precipitated in the red water, reducing the organic matter content in the red water, and recovering the DNT product.
[0030] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 The outer side wall of the separation tank 11 is provided with a heating component for heating.
[0031] For details, please refer to Figure 1 as well as Figure 2 The outer wall of the separation tank 11 is provided with a heating component, which is used to heat the outer wall of the separation tank 11. When a large amount of DNT products are deposited in the separation tank 11, the heating component heats the outer wall of the separation tank 11. The DNT products condensed on the outer wall of the separation tank 11 are melted by the heat and deposited at the bottom of the separation tank 11. After the temperature at the bottom of the separation tank 11 stabilizes, it is discharged into the collection tank 12 through the collection pipe 15 at the bottom of the separation tank 11.
[0032] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 The heating assembly includes an upper jacket heating component 18 and a tower bottom coil heating component 20. The upper jacket heating component 18 and the tower bottom coil heating component 20 are suitable for passing circulating water / circulating hot water.
[0033] For details, please refer to Figure 1 as well as Figure 2 The heating assembly includes an upper jacket heating component 18, a middle jacket heating component 19 and a tower bottom coil heating component 20. The upper jacket heating component 18 is arranged around the outer wall of the upper part of the separation tank 11, the middle jacket heating component 19 is arranged around the outer wall of the middle part of the separation tank 11, and the tower bottom coil heating component 20 is arranged around the outer wall of the bottom of the separation tank 11. The upper jacket heating component 18 and the tower bottom coil heating component 20 can be introduced into the circulating water or circulating hot water as needed. When the circulating water is introduced, the temperature in the separation tank 11 is relatively low, which helps the DNT product to condense in the red water. When the circulating hot water is introduced, the temperature in the separation tank 11 increases, which helps the DNT product to melt by heat and deposit at the bottom of the separation tank 11.
[0034] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 The lower end of the outer wall of the separation tank 11 is provided with a first observation mirror 21 for observing the internal DNT product situation, and the upper end of the outer wall of the collection tank 12 is provided with a second observation mirror 22 for observing the internal DNT product situation.
[0035] For details, please refer to Figure 1 as well as Figure 2 A first observation mirror 21 is provided at the lower end of the outer wall of the separation tank 11, a second observation mirror 22 is provided at the upper end of the outer wall of the collection tank 12, and a third observation mirror 23 is provided on the collection pipe 15 between the separation tank 11 and the collection tank 12, so as to facilitate observation of the DNT product in the device.
[0036] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 The upper end of the collecting tank 12 is provided with an air inlet pipe 24 suitable for introducing an external air source.
[0037] For details, please refer to Figure 1 as well as Figure 2 An air inlet pipe 24 is provided at the upper end of the collecting tank 12. The air inlet pipe 24 is connected to an external gas source, which can be low-pressure nitrogen. The low-pressure nitrogen enters the collecting tank 12 and can press the DNT product in the collecting tank 12 out of the collection pipe 13 of the collecting tank 12.
[0038] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 , the collection pipe 13 is connected to the secondary cleaning tower 2.
[0039] For details, please refer to Figure 1 as well as Figure 2 The collection pipe 13 is connected to the secondary cleaning tower 2, so that the DNT product in the collection tank 12 can be returned to the secondary cleaning tower 2 for recovery of the DNT product.
[0040] As a specific embodiment of the wastewater organic matter recovery device provided by the utility model, please refer to Figure 1 as well as Figure 2 A coalescing and separating pipe 25 suitable for the flow of red water is provided between the coalescer 4 and the red water separator.
[0041] For details, please refer to Figure 1 as well as Figure 2 A coalescing and separating pipe 25 is connected between the coalescer 4 and the red water separator to facilitate the discharge of the red water in the coalescer 4 into the red water separator for the recovery of the DNT product in the red water.
[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A device for recovering organic matter from wastewater, characterized in that: It includes a primary cleaning tower, a secondary cleaning tower, a tertiary cleaning tower, a coalescer and a red water separator. The primary cleaning tower is provided with a primary feeding pipe suitable for discharging DNT products. A first connecting pipe suitable for the flow of DNT products is provided between the primary cleaning tower and the secondary cleaning tower. A second connecting pipe suitable for the flow of DNT products is provided between the secondary cleaning tower and the tertiary cleaning tower. The coalescer is provided on the second connecting pipe. The tertiary cleaning tower is provided with a tertiary discharge pipe suitable for discharging DNT products. A separation pipe suitable for the flow of red water is provided between the tertiary cleaning tower and the red water separator. A red water return pipe suitable for returning red water to the secondary cleaning tower is provided between the tertiary cleaning tower and the secondary cleaning tower. The red water separator is also provided with a collection pipe suitable for discharging deposited DNT products. The red water separator is also provided with a red water discharge pipe.
2. The device for recovering organic matter from wastewater according to claim 1, characterized in that: The red water separator includes a separation tank and a collection tank. The separation pipe and the red water discharge pipe are arranged on the separation tank. A collection pipe suitable for the flow of deposited DNT products is arranged between the separation tank and the collection tank. The collection pipe is arranged on the collection tank.
3. The device for recovering organic matter from wastewater according to claim 2, characterized in that: A vertical drainage pipe is provided in the separation tank, the upper end of the drainage pipe is connected to the separation pipe, and the lower end of the drainage pipe is located at the lower end of the separation tank.
4. The device for recovering organic matter from wastewater according to claim 3, characterized in that: The red water discharge pipe is horizontally arranged to pass through the side wall of the upper end of the separation tank, and a filter screen is arranged at one end of the red water discharge pipe located in the separation tank.
5. The device for recovering organic matter from wastewater according to claim 2, characterized in that: The outer side wall of the separation tank is provided with a heating component for heating.
6. The device for recovering organic matter from wastewater according to claim 5, characterized in that: The heating assembly includes an upper jacket heating component and a tower bottom coil heating component. The upper jacket heating component and the tower bottom coil heating component are suitable for passing circulating water / circulating hot water.
7. The device for recovering organic matter from wastewater according to claim 2, characterized in that: The lower end of the outer side wall of the separation tank is provided with a first observation mirror for observing the internal DNT product situation, and the upper end of the outer side wall of the collection tank is provided with a second observation mirror for observing the internal DNT product situation.
8. The device for recovering organic matter from wastewater according to claim 2, characterized in that: The upper end of the collecting tank is provided with an air inlet pipe suitable for introducing an external air source.
9. The device for recovering organic matter from wastewater according to claim 2, characterized in that: The collection pipeline is connected to the secondary cleaning tower.
10. The device for recovering organic matter from wastewater according to claim 1, characterized in that: A coalescing and separating pipeline suitable for the flow of red water is provided between the coalescer and the red water separator.