Glass rectification device with waste liquid recovery
By designing a glass distillation unit with a multi-jacketed vessel and condenser, the environmental pollution and resource waste problems of waste liquid containing DCM and methanol were solved, achieving efficient recovery and separation of waste liquid, and improving separation purity and equipment stability.
Patent Information
- Application Number
- CN202522668985.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-17
AI Technical Summary
In the existing technology, the direct discharge of mixed waste liquid containing DCM and methanol leads to environmental pollution and resource waste, and there is a lack of effective recycling devices.
Design a glass distillation apparatus comprising multiple jacketed vessels, distillation columns, and condensers. Through distillation and condensation processes, DCM and methanol are recovered into receiving bottles and collection tanks, respectively. Utilizing condensers of different materials and heat engines in conjunction with metering pumps, quantitative delivery and precise temperature control are achieved, and a material reflux loop is constructed to improve separation efficiency.
It achieves effective separation and recovery of DCM and methanol, protects the environment, reduces energy consumption, improves separation purity and product quality, and avoids equipment damage.
Smart Images
Figure CN224925624U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glass distillation experiments, and in particular to a glass distillation apparatus that allows for waste liquid recovery. Background Technology
[0002] Dichloromethane (DCM) and methanol are commonly used organic solvents in the chemical, pharmaceutical, fine chemical, and laboratory fields. During production processes and experimental operations, a large amount of mixed waste liquid containing DCM and methanol is generated. If this waste liquid is discharged directly, it will not only cause serious environmental pollution but also lead to resource waste. There is an urgent need for a glass distillation device that can recover waste liquid to treat the waste liquid. Utility Model Content
[0003] The purpose of this invention is to provide a glass distillation apparatus that can recycle waste liquid, so as to solve the problems existing in the prior art.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A glass distillation apparatus for waste liquid recovery includes a raw material tank, a first jacketed vessel, a second jacketed vessel, a third jacketed vessel, a first distillation column, a second distillation column, a first condenser, a second condenser, a receiving bottle, and a collection tank. Each of the first, second, and third jacketed vessels has three connection ports. The raw material tank is connected to the first connection port of the first jacketed vessel. The second connection port of the first jacketed vessel is connected to the middle section of the first distillation column. The top of the first distillation column is connected to the first connection end of the first condenser. The second connection end of the first condenser is connected to the receiving bottle. The third connection port of the second jacketed vessel is connected to the first connection port of the third jacketed vessel. The second connection port of the third jacketed vessel is connected to the bottom end of the second distillation column. The third connection port of the third jacketed vessel is connected to the collection tank. The top of the second distillation column is connected to the first input end of the second condenser. The second input end of the second condenser is connected to the receiving tank.
[0005] By adopting the above technical solution, the raw material is distilled through the first and second distillation columns, and condensed through the first and second condensers. The DCM and methanol in the raw material are then fed into the receiving bottle and the collection tank respectively, thereby separating the raw material, protecting the environment, and preventing environmental pollution.
[0006] In a further embodiment, the outer walls of the first jacketed vessel and the second jacketed vessel are both connected to the same first heat engine, and the outer wall of the third jacketed vessel is connected to a second heat engine. The first heat engine and the second heat engine are used to heat the first jacketed vessel, the second jacketed vessel and the third jacketed vessel. The first condenser and the second condenser are both connected to the same refrigeration unit, and the refrigeration unit is used to cool the first condenser and the second condenser.
[0007] By adopting the above technical solutions, the first heat engine is adapted to the similar pretreatment conditions of the first and second jacketed reactors, ensuring temperature synchronization. The second heat engine specifically meets the high-temperature requirements of the deep distillation of the third jacketed reactor, achieving precise temperature control. At the same time, the refrigerator provides cooling for both condensers, reducing equipment redundancy, lowering energy consumption, ensuring stable condensation medium temperature, improving the condensation efficiency of gaseous materials, and ensuring consistency of process parameters.
[0008] In a further embodiment, a first metering pump is connected between the first jacketed vessel and the raw material tank, a second metering pump is connected between the first jacketed vessel and the second jacketed vessel, and a third metering pump is provided between the second jacketed vessel and the third jacketed vessel. The first metering pump is used to transport the raw material in the raw material tank to the first jacketed vessel, the second metering pump is used to transport the material in the first jacketed vessel to the second jacketed vessel, and the third metering pump is used to transport the material in the second jacketed vessel to the third jacketed vessel.
[0009] By adopting the above technical solution, three metering pumps are used to achieve quantitative delivery of materials at each stage, avoiding the problems of material stagnation and delivery rate fluctuations during material transfer, ensuring the continuity and stability of raw material feeding and intermediate material transfer, and laying the foundation for efficient subsequent distillation and separation.
[0010] In a further embodiment, the third input terminal of the second condenser is connected to the first input terminal of the third condenser, the second input terminal of the third condenser is connected to a vacuum pump, a pressure regulating valve is provided between the vacuum pump and the third condenser, the vacuum pump is used to discharge exhaust gas, and the third condenser is also connected to a refrigeration unit.
[0011] By adopting the above technical solution, the third condenser receives the incompletely condensed gas phase from the second condenser for deep condensation, and in conjunction with the low-temperature cooling of the refrigerator, further improves the recovery rate of the target component.
[0012] In a further embodiment, the third input end of the third condenser is connected to the receiving tank, the first condenser is also provided with an exhaust port for discharging exhaust gas, the second connection end of the first condenser is also connected to the top of the first distillation column through a first pipe, and the second connection end of the second condenser is also connected to the top of the second distillation column through a second pipe.
[0013] By adopting the above technical solution, the first and second pipelines form a material reflux loop, allowing the incompletely separated gaseous material to flow back to the corresponding distillation column to re-participate in distillation, thereby improving the separation purity of DCM and methanol. The third condenser is directly connected to the receiving tank to achieve secondary purification and condensation of the finished product, further ensuring product quality. The exhaust port of the first condenser and the vacuum pump form a dual exhaust gas emission channel, ensuring that the exhaust gas from different process stages can be discharged in a standardized manner, avoiding pollution of the working environment, while improving the stability and controllability of the process.
[0014] In a further embodiment, the first condenser is made of glass, and the second and third condensers are made of high borosilicate glass.
[0015] By adopting the above technical solution, the first condenser processes the low-concentration gas phase that has undergone preliminary vaporization. The operating conditions are mild, and the glass material can meet the basic condensation requirements while controlling the overall cost of the device. The second and third condensers are located in the core distillation and deep condensation stages. They need to withstand drastic temperature differences and come into direct contact with high-concentration organic solvents such as DCM and methanol. The high borosilicate material has excellent thermal stability, corrosion resistance, and no impurity precipitation characteristics. This can not only avoid the risk of equipment explosion caused by sudden temperature changes, but also ensure that the purity of the finished product is not contaminated by the material.
[0016] In summary, this utility model has the following beneficial effects: 1. The first condenser processes the low-concentration gas phase that has undergone preliminary vaporization. The operating conditions are mild, and the glass material can meet the basic condensation requirements while controlling the overall cost of the device. The second and third condensers are located in the core distillation and deep condensation stages. They need to withstand drastic temperature differences and come into direct contact with high-concentration organic solvents such as DCM and methanol. High borosilicate glass has excellent thermal stability, corrosion resistance, and no impurity precipitation characteristics. It can avoid the risk of equipment cracking caused by sudden temperature changes and ensure that the purity of the finished product is not contaminated by the material. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection relationship of the first distillation column of this utility model; Figure 3 This is a schematic diagram of the connection relationship of the second distillation column of this utility model.
[0018] In the diagram, 1. Raw material tank; 2. First jacketed vessel; 3. Second jacketed vessel; 4. Third jacketed vessel; 5. First distillation column; 6. Second distillation column; 7. First condenser; 8. Second condenser; 9. Receiving bottle; 10. Collection tank; 11. First heat engine; 12. Second heat engine; 13. Refrigeration unit; 14. First metering pump; 15. Second metering pump; 16. Third metering pump; 17. Third condenser; 18. Vacuum pump; 19. Receiving tank. Detailed Implementation
[0019] The present invention will be further described in detail below with reference to the accompanying drawings.
[0020] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.
[0021] Example 1: like Figures 1-3 As shown, a glass distillation apparatus for waste liquid recovery includes a raw material tank 1, a first jacketed vessel 2, a second jacketed vessel 3, a third jacketed vessel 4, a first distillation column 5, a second distillation column 6, a first condenser 7, a second condenser 8, a receiving bottle 9, and a collection tank 10. Each of the first jacketed vessel 2, second jacketed vessel 3, and third jacketed vessel 4 has three connection ports. The raw material tank 1 is connected to the first connection port of the first jacketed vessel 2; the second connection port of the first jacketed vessel 2 is connected to the middle section of the first distillation column 5; the top of the first distillation column 5 is connected to the first connection end of the first condenser 7; the second connection end of the first condenser 7 is connected to the receiving bottle 9; the third connection port of the second jacketed vessel 3 is connected to the first connection port of the third jacketed vessel 4; the second connection port of the third jacketed vessel 4 is connected to the bottom end of the second distillation column 6; the third connection port of the third jacketed vessel 4 is connected to the collection tank 10; the top of the second distillation column 6 is connected to the first input end of the second condenser 8; and the second input end of the second condenser 8 is connected to the receiving tank 19.
[0022] The first jacketed vessel 2 and the second jacketed vessel 3 have a volume of 5L, and the third jacketed vessel 4 has a volume of 10L. Temperature sensors are installed at the top, middle and bottom of the first jacketed vessel 2, the second jacketed vessel 3, the third jacketed vessel 4, the first distillation column 5 and the second distillation column 6. The temperature of the first jacketed vessel 2 is controlled at 60-63℃, the temperature inside the first distillation column 5 is controlled at 60-65℃, the temperature at the top of the first distillation column 5 is controlled at 38-40℃, a pressure sensor is installed inside the second distillation column 6, and the pressure inside the second distillation column 6 is controlled at 30000Pa. The receiving tank 19 has a volume of 50L, and the receiving bottle 9 has a volume of 5L.
[0023] The outer walls of the first jacketed vessel 2 and the second jacketed vessel 3 are both connected to the same first heat engine 11, and the outer wall of the third jacketed vessel 4 is connected to the second heat engine 12. The first heat engine 11 and the second heat engine 12 are used to heat the first jacketed vessel 2, the second jacketed vessel 3 and the third jacketed vessel 4. The first condenser 7 and the second condenser 8 are both connected to the same refrigerator 13, and the refrigerator 13 is used to cool the first condenser 7 and the second condenser 8.
[0024] A first metering pump 14 is connected between the first jacketed vessel 2 and the raw material tank 1. A second metering pump 15 is connected between the first jacketed vessel 2 and the second jacketed vessel 3. A third metering pump 16 is provided between the second jacketed vessel 3 and the third jacketed vessel 4. The first metering pump 14 is used to transport the raw material in the raw material tank 1 to the first jacketed vessel 2. The second metering pump 15 is used to transport the material in the first jacketed vessel 2 to the second jacketed vessel 3. The third metering pump 16 is used to transport the material in the second jacketed vessel 3 to the third jacketed vessel 4.
[0025] The third input terminal of the second condenser 8 is connected to the first input terminal of the third condenser 17. The second input terminal of the third condenser 17 is connected to a vacuum pump 18. A pressure regulating valve is provided between the vacuum pump 18 and the third condenser 17. The vacuum pump 18 is used to discharge exhaust gas. The third condenser 17 is also connected to the refrigerator 13.
[0026] The third input end of the third condenser 17 is connected to the receiving tank 19. The first condenser 7 is also provided with an exhaust port for discharging exhaust gas. The second connection end of the first condenser 7 is also connected to the top of the first distillation column 5 through a first pipe. The second connection end of the second condenser 8 is also connected to the top of the second distillation column 6 through a second pipe.
[0027] The first condenser 7 is made of glass, while the second condenser 8 and the third condenser 17 are made of high borosilicate glass. All connection ports, connection ends and pipes are equipped with valves to control their opening and closing.
[0028] Specific implementation process: The raw material in the raw material tank 1 is transported to the first jacketed vessel 2 by the first metering pump 14. The first heat engine 11 connected to the outer wall of the first jacketed vessel 2 is started to heat the material inside, controlling the temperature at 60-63℃. After the material in the first jacketed vessel 2 reaches the set temperature, it is transported to the second jacketed vessel 3 by the second metering pump 15. The material in the second jacketed vessel 3 is transported to the third jacketed vessel 4 by the third metering pump 16. The second heat engine 12 heats the material, and the temperature of the material is monitored and maintained in real time. The material in the third jacketed vessel 4... The material is transported to the bottom of the second distillation column 6. The pressure sensor inside the second distillation column 6 monitors the pressure in real time to ensure that the pressure inside the column is stable at 30,000 Pa. At the same time, the waste liquid generated by the third jacketed vessel 4 is transported to the collection tank 10 for recycling through the third connection port. The steam discharged from the top of the second distillation column 6 enters the first input end of the second condenser 8. The second condenser 8 is connected to the unified refrigeration unit 13. The material that does not meet the requirements flows back to the top of the second distillation column 6 through the second pipeline, while the material that meets the requirements is transported to the receiving tank 19 through the second input end of the second condenser 8.
[0029] The material in the first jacketed vessel 2 is transported to the middle section of the first distillation column 5 through the second connection port. Temperature sensors are installed at the top, middle and bottom of the first distillation column 5 to monitor and control the temperature in the column at 60~65℃ and the temperature at the top of the column at 38-40℃ in real time. The steam discharged from the top of the first distillation column 5 enters the first connection port of the first condenser 7. The material that does not meet the requirements flows back to the top of the first distillation column 5 through the first pipe, while the material that meets the requirements is transported to the receiving bottle 9. The exhaust port on the first condenser 7 discharges the tail gas in real time. The third input port of the second condenser 8 transports the incompletely condensed gas to the first input port of the third condenser 17. The second input port of the third condenser 17 is connected to the vacuum pump 18. After the gas pressure is adjusted by the pressure regulating valve, the vacuum pump 18 starts to discharge the tail gas. At the same time, the third input port of the third condenser 17 is connected to the receiving tank 19 to further collect the condensed material, thus completing the entire distillation and waste liquid recovery process.
[0030] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.
[0031] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A glass distillation apparatus capable of recovering waste liquid, characterized in that: The system includes a raw material tank (1), a first jacketed vessel (2), a second jacketed vessel (3), a third jacketed vessel (4), a first distillation column (5), a second distillation column (6), a first condenser (7), a second condenser (8), a receiving bottle (9), and a collecting tank (10). Each of the first jacketed vessel (2), the second jacketed vessel (3), and the third jacketed vessel (4) has three connection ports. The raw material tank (1) is connected to the first connection port of the first jacketed vessel (2), and the second connection port of the first jacketed vessel (2) is connected to the middle section of the first distillation column (5). The top of the first distillation column (5)... The first end of the first condenser (7) is connected to the first connection end of the first condenser (7), the second connection end of the first condenser (7) is connected to the receiving bottle (9), the third connection port of the second jacketed vessel (3) is connected to the first connection port of the third jacketed vessel (4), the second connection port of the third jacketed vessel (4) is connected to the bottom end of the second distillation column (6), the third connection port of the third jacketed vessel (4) is connected to the collecting tank (10), the top end of the second distillation column (6) is connected to the first input end of the second condenser (8), and the second input end of the second condenser (8) is connected to the receiving tank (19).
2. The glass distillation apparatus for waste liquid recovery according to claim 1, characterized in that: The outer walls of the first jacketed vessel (2) and the second jacketed vessel (3) are connected to the same first heat engine (11), and the outer wall of the third jacketed vessel (4) is connected to the second heat engine (12). The first heat engine (11) and the second heat engine (12) are used to heat the first jacketed vessel (2), the second jacketed vessel (3) and the third jacketed vessel (4). The first condenser (7) and the second condenser (8) are connected to the same refrigerator (13), and the refrigerator (13) is used to cool the first condenser (7) and the second condenser (8).
3. The glass distillation apparatus for waste liquid recovery according to claim 1, characterized in that: A first metering pump (14) is connected between the first jacketed vessel (2) and the raw material tank (1), a second metering pump (15) is connected between the first jacketed vessel (2) and the second jacketed vessel (3), and a third metering pump (16) is provided between the second jacketed vessel (3) and the third jacketed vessel (4). The first metering pump (14) is used to transport the raw material in the raw material tank (1) to the first jacketed vessel (2), the second metering pump (15) is used to transport the material in the first jacketed vessel (2) to the second jacketed vessel (3), and the third metering pump (16) is used to transport the material in the second jacketed vessel (3) to the third jacketed vessel (4).
4. The glass distillation apparatus for waste liquid recovery according to claim 1, characterized in that: The third input terminal of the second condenser (8) is connected to the first input terminal of the third condenser (17), and the second input terminal of the third condenser (17) is connected to a vacuum pump (18). A pressure regulating valve is provided between the vacuum pump (18) and the third condenser (17). The vacuum pump (18) is used to discharge exhaust gas, and the third condenser (17) is also connected to the refrigerator (13).
5. The glass distillation apparatus for waste liquid recovery according to claim 4, characterized in that: The third input end of the third condenser (17) is connected to the receiving tank (19). The first condenser (7) is also provided with an exhaust port for discharging exhaust gas. The second connection end of the first condenser (7) is also connected to the top of the first distillation column (5) through a first pipe. The second connection end of the second condenser (8) is also connected to the top of the second distillation column (6) through a second pipe.
6. The glass distillation apparatus for waste liquid recovery according to claim 4, characterized in that: The first condenser (7) is made of glass, while the second condenser (8) and the third condenser (17) are made of high borosilicate material.