Acrylonitrile tail gas treatment device of rotary evaporator
By designing the coordinated system of oxidation treatment and activated carbon adsorption device in the rotary evaporator, the problem of difficulty reducing the acrylonite concentration in the tail gas in the tail gas, and realizing a more efficient tail gas treatment and a safer operating environment.
Patent Information
- Application Number
- CN202421102133.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-20
AI Technical Summary
When rotary evaporators treat polymer polyol synthesis products, it is difficult to effectively reduce the acrylonitrile concentration in the exhaust gas, resulting in the emission of highly toxic chemicals, endangering air pollution and operator safety.
A rotating evaporates acryline -tail gas treatment device, including oxidative treatment device, anti -inverted suction device, and activated carbon adsorption device. The coordinated effect of oxidation reactions and activated carbon adsorption is reduced to reduce the concentration of acrylic.
Effectively reduce the concentration of propylene pheasant in the acryllene exhaust gas, improve the effect of tail gas treatment, and protect the safety of the atmospheric environment and operator.
Smart Images
Figure CN222400930U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tail gas treatment, in particular to a rotary evaporator acrylonitrile tail gas treatment device. Background Art
[0002] Rotary evaporator, also known as rotary evaporator, is a distillation instrument widely used in experimental fields such as biology, chemistry, and medicine. It consists of a drive motor, a transmission shaft, a distillation flask, a heater, a condenser, a receiver, a vacuum pump, and other components. Rotary evaporator is mostly used for continuous distillation of volatile components under reduced pressure conditions. Currently, diaphragm vacuum pumps are mostly used for reduced pressure operation.
[0003] Currently, when performing stripping operations on polymer polyol (POP) synthesis products in the laboratory, it is necessary to use a rotary evaporator to perform steam distillation on materials containing residual acrylonitrile monomer (content 10-100 mg / kg). The gaseous acrylonitrile monomer dissipated in the tail gas is difficult to be reduced to below the acrylonitrile waste gas emission limit of 0.5 mg / m3 by the rotary evaporator condensation device (GB31572-2015, Synthetic Resin Industry Pollutant Emission Standard). In addition to causing air pollution, the excessive acrylonitrile gas emissions, as it is a highly toxic chemical, will also cause serious toxic effects on operators when accumulated in the air. Utility Model Content
[0004] The utility model aims to provide a rotary evaporator acrylonitrile tail gas treatment device to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary evaporator acrylonitrile tail gas treatment device, comprising an oxidation treatment device, an anti-backflow device and an activated carbon adsorption device, wherein the anti-backflow device and the activated carbon adsorption device are respectively located on both sides of the oxidation treatment device, a sodium hypochlorite aqueous solution is arranged in the oxidation treatment device, an exhaust gas inlet pipe is arranged in the anti-backflow device, and the anti-backflow device is connected to the oxidation treatment device through a connecting pipe 1, the oxidation treatment device is connected to the activated carbon adsorption device through a connecting pipe 2, and an exhaust pipe is connected to the bottom of the activated carbon adsorption device.
[0006] Preferably, the pH value of the sodium hypochlorite aqueous solution is >10.
[0007] Preferably, the oxidation treatment device is a box-type structure, a water injection port is provided at the top of the oxidation treatment device, and a drainage port is provided at the bottom of the oxidation treatment device.
[0008] Preferably, a temperature control coil is wound around the oxidation treatment device.
[0009] Preferably, the connecting tube 1 and the connecting tube 2 are both inverted U-shaped structures, and one end of the connecting tube 1 extends to the bottom of the oxidation treatment device, the other end of the connecting tube 1 extends to the bottom of the anti-backflow device, one end of the connecting tube 2 extends to the upper part of the oxidation treatment device, and the other end of the connecting tube 2 extends to the upper part of the activated carbon adsorption device.
[0010] Preferably, a liquid level indicating window is provided on one side of the oxidation treatment device.
[0011] Preferably, the exhaust gas intake pipe, connecting pipe 1, connecting pipe 2 and exhaust pipe are all polytetrafluoroethylene flexible conduits.
[0012] Compared with the prior art, the utility model has the following beneficial effects: through the synergistic effect of the oxidation reaction device and the activated carbon adsorption device, the acrylonitrile tail gas of the rotary evaporator is treated, the concentration of acrylonitrile in the acrylonitrile waste gas is effectively reduced, the effectiveness of the oxidation reaction device is guaranteed through temperature monitoring and control, and the safety of the entire device is improved through the anti-backflow device.
[0013] The advantages and technical effects of the utility model are as follows:
[0014] 1. It is an additional device for the extended function of the rotary evaporator, which improves the tail gas treatment effect of the rotary evaporator, reduces the emission concentration of the highly toxic pollutant acrylonitrile, and protects the atmospheric environment and the safety of operators;
[0015] 2. The device is compatible with the currently used rotary evaporator, and is easy to add. No changes are required to the existing instrument. The components are added as a whole, and plug and play is possible.
[0016] 3. The temperature control system of the oxidation reaction device with temperature detection and adjustment can effectively ensure the effective progress of the acrylonitrile oxidation reaction;
[0017] 4. The exhaust gas transfer duct has a convenient connection interface for quick connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the utility model.
[0019] In the figure: 1. oxidation treatment device; 2. anti-backflow device; 3. activated carbon adsorption device; 4. temperature control coil; 5. water injection port; 6. drainage port; 7. liquid level indicator window; 8. exhaust gas inlet pipe; 9. connecting pipe 1; 10. connecting pipe 2; 11. exhaust pipe. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1 The utility model provides a technical solution: a rotary evaporator acrylonitrile tail gas treatment device, comprising an oxidation treatment device 1, an anti-backflow device 2 and an activated carbon adsorption device 3, the anti-backflow device 2 and the activated carbon adsorption device 3 are respectively located on both sides of the oxidation treatment device 1, a sodium hypochlorite aqueous solution is arranged in the oxidation treatment device 1, a waste gas intake pipe 8 is arranged in the anti-backflow device 2, and the anti-backflow device 2 is connected to the oxidation treatment device 1 through a connecting pipe 1 9, the oxidation treatment device 1 is connected to the activated carbon adsorption device 3 through a connecting pipe 2 10, and an exhaust pipe 11 is connected to the bottom of the activated carbon adsorption device 3.
[0022] In the utility model, the pH value of the sodium hypochlorite aqueous solution is greater than 10, which facilitates reducing the concentration of acrylonitrile in the acrylonitrile waste gas.
[0023] In the utility model, the oxidation treatment device 1 is a box-type structure, a water injection port 5 is arranged at the top of the oxidation treatment device 1, and a drainage port 6 is arranged at the bottom of the oxidation treatment device 1, so as to facilitate the inlet and outlet of liquid to the oxidation treatment device 1.
[0024] In the utility model, a temperature control coil 4 is wound around the outside of the oxidation treatment device 1, and the temperature of the oxidation treatment device 1 is adjusted by the coil wound around the outside.
[0025] In the utility model, connecting pipe 1 9 and connecting pipe 2 10 are both inverted U-shaped structures, and one end of connecting pipe 1 9 extends to the bottom of the oxidation treatment device 1, and the other end of connecting pipe 1 9 extends to the bottom of the anti-backflow device 2, one end of connecting pipe 2 10 extends to the upper part of the oxidation treatment device 1, and the other end of connecting pipe 2 10 extends to the upper part of the activated carbon adsorption device 3. The setting of the inverted U-shaped pipeline facilitates the mutual connection of the oxidation treatment device 1, the anti-backflow device 2 and the activated carbon adsorption device 3.
[0026] In the utility model, a liquid level indicating window 7 is provided on one side of the oxidation treatment device 1, which is convenient for observing the internal situation of the oxidation treatment device 1 and has the functions of internal water volume detection and liquid level display.
[0027] In the utility model, the exhaust gas intake pipe 8, the connecting pipe 1 9, the connecting pipe 2 10 and the exhaust pipe 11 are all polytetrafluoroethylene flexible conduits, which are corrosion-resistant and have a longer service life.
[0028] The utility model: waste gas enters the anti-backflow device 2 through the waste gas inlet pipe 8, the anti-backflow device 2 transports the waste gas to the oxidation treatment device 1 through the connecting pipe 1 9, the waste gas passes through the sodium hypochlorite solution with a pH value greater than 10, enters the activated carbon adsorption device 3 through the connecting pipe 2 10 for filtration, and is discharged through the exhaust pipe 11. The utility model treats the acrylonitrile tail gas of the rotary evaporator through the synergistic effect of the oxidation reaction device and the activated carbon adsorption device, effectively reduces the concentration of acrylonitrile in the acrylonitrile waste gas, ensures the effectiveness of the oxidation reaction device through temperature monitoring and control, and improves the safety of the entire device through the anti-backflow device.
[0029] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the utility model have been shown and described, it is understandable to those of ordinary skill in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.
Claims
1. A rotary evaporator acrylonitrile tail gas treatment device, characterized in that: The invention comprises an oxidation treatment device (1), an anti-backflow device (2) and an activated carbon adsorption device (3), wherein the anti-backflow device (2) and the activated carbon adsorption device (3) are respectively located on both sides of the oxidation treatment device (1), a sodium hypochlorite aqueous solution is arranged in the oxidation treatment device (1), an exhaust gas intake pipe (8) is arranged in the anti-backflow device (2), and the anti-backflow device (2) is connected to the oxidation treatment device (1) through a connecting pipe 1 (9), and the oxidation treatment device (1) is connected to the activated carbon adsorption device (3) through a connecting pipe 2 (10), and the The bottom of the activated carbon adsorption device (3) is connected to an exhaust pipe (11), the oxidation treatment device (1) is wound with a temperature control coil (4), the connecting pipe 1 (9) and the connecting pipe 2 (10) are both inverted U-shaped structures, and one end of the connecting pipe 1 (9) extends to the bottom of the oxidation treatment device (1), the other end of the connecting pipe 1 (9) extends to the bottom of the anti-backflow device (2), one end of the connecting pipe 2 (10) extends to the upper part of the oxidation treatment device (1), and the other end of the connecting pipe 2 (10) extends to the upper part of the activated carbon adsorption device (3).
2. A rotary evaporator acrylonitrile tail gas treatment device according to claim 1, characterized in that: The pH value of the sodium hypochlorite aqueous solution is greater than 10.
3. A rotary evaporator acrylonitrile tail gas treatment device according to claim 1, characterized in that: The oxidation treatment device (1) is a box-type structure. A water injection port (5) is provided at the top of the oxidation treatment device (1), and a drainage port (6) is provided at the bottom of the oxidation treatment device (1).
4. A rotary evaporator acrylonitrile tail gas treatment device according to claim 1, characterized in that: A liquid level indicating window (7) is provided on one side of the oxidation treatment device (1).
5. A rotary evaporator acrylonitrile tail gas treatment device according to claim 1, characterized in that: The exhaust gas intake pipe (8), the first connecting pipe (9), the second connecting pipe (10) and the exhaust pipe (11) are all polytetrafluoroethylene flexible conduits.