Environment-friendly treatment system for erlotinib intermediate production wastewater

Abstract

The utility model discloses an environment-friendly treatment system for erlotinib intermediate production wastewater. The environment-friendly treatment system comprises a triethylamine recovery kettle, a condenser and a tail gas absorber, an exhaust port of the triethylamine recovery kettle is communicated with a shell pass of the condenser, a tail gas exhaust port of the condenser is communicated with a gas inlet pipe of the tail gas absorber, a cold and hot medium coil pipe is arranged outside the triethylamine recovery kettle, and a tail gas outlet is further formed in the top end of the tail gas absorber. Preferably, a stirrer is arranged in the triethylamine recovery kettle, and the stirrer is driven by a first rotating motor to rotate. Preferably, a discharge port is formed in the bottom end of the triethylamine recovery kettle, a liquid separation observer is mounted on the discharge port, and a transparent observation window is arranged on the liquid separation observer. According to the utility model, the absorption capacity of the absorption liquid to organic gas in the tail gas is enhanced, the tail gas can be discharged after reaching the standard after being treated, and the pollution to the atmospheric environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of erlotinib intermediate production, in particular to an environmentally friendly treatment system for erlotinib intermediate production wastewater. Background Art

[0002] The production process of erlotinib intermediates includes several environments: condensation reaction, reduction reaction, elimination reaction and purification reaction. During the condensation reaction, the wastewater after the condensation reaction contains triethylamine, which needs to be recovered.

[0003] When recovering triethylamine by distillation, in the tail gas treatment link, existing technologies are often unable to effectively treat the non-condensable waste gas discharged from the condenser. The gas is not in sufficient contact with the absorption liquid, resulting in the organic gas in the tail gas not being fully absorbed. Direct discharge into the air will cause serious pollution to the atmospheric environment, endangering human health and ecological balance. Utility Model Content

[0004] In order to solve the problems mentioned in the above background technology, the utility model provides an environmentally friendly treatment system for wastewater produced by the production of erlotinib intermediates.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An environmentally friendly treatment system for wastewater from the production of erlotinib intermediates, comprising a triethylamine recovery kettle, a condenser, and a tail gas absorber;

[0007] The exhaust port of the triethylamine recovery kettle is connected to the shell side of the condenser, the tail gas discharge port of the condenser is connected to the air inlet pipe of the tail gas absorber, the outside of the triethylamine recovery kettle is provided with a cold and hot medium coil, and the top of the tail gas absorber is also provided with a tail gas outlet.

[0008] Preferably, an agitator is installed in the triethylamine recovery kettle, and the agitator is driven to rotate by a first rotary motor.

[0009] Preferably, a discharge port is provided at the bottom end of the triethylamine recovery kettle, a liquid separation observer is installed on the discharge port, and a transparent observation window is provided on the liquid separation observer.

[0010] Preferably, a vertically arranged gas guide pipe is rotatably installed in the exhaust gas absorber, the gas guide pipe is connected to the intake pipe through a rotary joint, the gas guide pipe is driven to rotate by a second rotary motor, and a gas distribution mechanism is provided at the bottom end of the gas guide pipe.

[0011] Preferably, the gas distribution mechanism includes multiple mounting brackets, a gas distribution box is fixed on the top of the mounting bracket, the gas distribution box and the gas guide pipe are connected by a connecting pipe, a plurality of vertical branch pipes are rotatably installed on the top of the gas guide pipe, a plurality of horizontal branch pipes are fixed on the outside of the vertical branch pipes, and a gas outlet is opened on the horizontal branch pipe.

[0012] Preferably, a first spur gear is fixed to the outside of the vertical branch pipe, a second spur gear is rotatably installed between adjacent first spur gears on the gas distribution box, the first spur gear and the second spur gear are meshed in sequence, a gear ring is fixed on the top inner wall of the exhaust gas absorber through a bracket, and the first spur gear closest to the gas guide pipe is meshed with the gear ring.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. After the non-condensable exhaust gas flowing out of the exhaust outlet of the condenser enters the exhaust absorber, it is first connected to the gas guide pipe through the rotary joint. This ensures that when the gas guide pipe is driven by the second rotary motor, the exhaust gas can stably flow into the gas guide pipe and be guided to the bottom of the absorption liquid.

[0015] 2. The combined design of the gas distribution box, vertical branch pipes and horizontal branch pipes in the gas distribution mechanism drives the gas distribution box to rotate when the gas guide pipe rotates, causing the positions of the vertical branch pipes and horizontal branch pipes to change continuously, thus achieving uniform distribution of the exhaust gas in the absorption liquid, greatly increasing the contact area between the exhaust gas and the absorption liquid, and improving the absorption efficiency of organic gases in the exhaust gas;

[0016] 3. The first spur gear on the outside of the vertical branch pipe, the second spur gear on the gas distribution box and the gear ring on the inner wall of the top of the exhaust absorber cooperate with each other. During the rotation of the gas guide pipe, the vertical branch pipe rotates synchronously, which not only further optimizes the gas distribution effect, but also drives the horizontal branch pipe to stir the absorption liquid, making the absorption liquid concentration more uniform, and enhancing the absorption capacity of the absorption liquid for organic gases in the exhaust gas, ensuring that the exhaust gas can meet the emission standards after treatment, reducing pollution to the atmospheric environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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.

[0018] Figure 1 This is a schematic diagram of the connection relationship between the triethylamine recovery kettle and the condenser of the utility model from the first perspective;

[0019] Figure 2 This is a schematic diagram of the connection relationship between the triethylamine recovery kettle and the condenser of the utility model from a second perspective;

[0020] Figure 3 This is a schematic diagram of the structure of the exhaust gas absorber of the utility model;

[0021] Figure 4 This is a schematic diagram of the gas distribution mechanism of the present invention from a first perspective;

[0022] Figure 5 This is a schematic diagram of the gas distribution mechanism of the present invention from a second perspective;

[0023] In the figure: 3 triethylamine recovery kettle, 301 cold and hot medium coil, 302 discharge port, 303 exhaust port, 304 first rotating motor, 305 stirrer, 306 liquid separation observer, 9 condenser, 901 tail gas discharge port, 10 tail gas absorber, 1001 air inlet pipe, 1002 tail gas outlet, 1003 gas guide pipe, 1004 second rotating motor, 1005 rotary joint, 11 mounting bracket, 12 gas distribution box, 1201 vertical branch pipe, 1202 horizontal branch pipe, 1203 first spur gear, 1204 second spur gear. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example

[0026] Reference Figure 1-5 , an environmentally friendly treatment system for wastewater from the production of erlotinib intermediates, comprising a triethylamine recovery kettle 3, a condenser 9 and a tail gas absorber 10;

[0027] The exhaust port 303 of the triethylamine recovery kettle 3 is connected to the shell side of the condenser 9, and the tail gas discharge port 901 of the condenser 9 is connected to the air inlet pipe 1001 of the tail gas absorber 10. The outside of the triethylamine recovery kettle 3 is provided with a cold and hot medium coil 301, and the top of the tail gas absorber 10 is also provided with a tail gas outlet 1002;

[0028] The waste water after the condensation reaction contains triethylamine, which needs to be recovered. The aqueous phase is first transferred to the triethylamine recovery kettle 3, stirred and neutralized with 30% liquid caustic soda, and separated into layers. The lower liquid phase is discharged. The organic phase is distilled last time to distill out triethylamine, which is discharged through the exhaust port 303 and condensed and liquefied through the condenser 9 to obtain triethylamine liquid. The non-condensable waste gas flowing out of the tail gas discharge port 901 of the condenser 9 will cause air pollution and needs to be absorbed by an absorption liquid before it can be discharged. The tail gas enters the tail gas absorber 10, which is equipped with an absorption liquid.

[0029] The triethylamine recovery kettle 3 is provided with an agitator 305, which is driven to rotate by a first rotating motor 304;

[0030] Stirring by the stirrer 305 can improve the mixing effect, thereby accelerating neutralization.

[0031] The bottom of the triethylamine recovery kettle 3 is provided with a discharge port 302, and a liquid separation observer 306 is installed on the discharge port 302, and a transparent observation window is provided on the liquid separation observer 306;

[0032] The lower aqueous phase is discharged through the discharge port 302. The liquid state inside the discharge port 302 is observed in real time through the liquid separation observer 306. When the oil phase is found, the valve of the discharge port 302 is immediately closed to prevent the oil phase from being discharged.

[0033] A vertically arranged gas guide pipe 1003 is rotatably installed in the exhaust gas absorber 10. The gas guide pipe 1003 is connected to the intake pipe 1001 via a rotary joint 1005. The gas guide pipe 1003 is driven to rotate by a second rotating motor 1004. A gas distribution mechanism is provided at the bottom end of the gas guide pipe 1003.

[0034] The exhaust gas enters the exhaust absorber 10 through the intake pipe 1001 and flows into the gas guide pipe 1003 through the rotary joint 1005. Due to the existence of the rotary joint 1005, the second rotating motor 1004 drives the gas guide pipe 1003 to rotate without affecting the connectivity between the two. The exhaust gas is guided to the bottom of the absorption liquid through the gas guide pipe 1003, dispersed and flows out through the gas distribution mechanism, and fully contacts with the absorption liquid, thereby absorbing the organic gas in the exhaust gas.

[0035] The gas distribution mechanism includes multiple mounting brackets 11, with a gas distribution box 12 fixed to the top of the mounting bracket 11. The gas distribution box 12 is connected to the gas guide pipe 1003 via a connecting pipe 13. The top of the gas guide pipe 1003 is rotatably mounted with multiple vertical branch pipes 1201. The outside of the vertical branch pipes 1201 is fixed with multiple horizontal branch pipes 1202, and the horizontal branch pipes 1202 are provided with gas outlets.

[0036] When the gas guide pipe 1003 rotates, it can drive the gas distribution box 12 to rotate accordingly, so that the positions of the vertical branch pipe 1201 and the horizontal branch pipe 1202 can be continuously changed during the exhaust process to further improve the gas distribution effect.

[0037] A first spur gear 1203 is fixed to the outside of the vertical branch pipe 1201. A second spur gear 1204 is rotatably mounted between adjacent first spur gears 1203 on the gas distribution box 12. The first spur gears 1203 and the second spur gears 1204 are meshed in sequence. A gear ring 14 is fixed to the inner wall of the top end of the exhaust absorber 10 via a bracket. The first spur gear 1203 closest to the gas guide pipe 1003 is meshed with the gear ring 14.

[0038] When the gas guide tube 1003 rotates, since the gear ring 14 is stationary, one of the first straight gears 1203 will rotate while moving around the gear ring 14, and then through the transmission of the second straight gear 1204, drive multiple first straight gears 1203 to rotate synchronously, and then drive multiple vertical branch pipes 1201 to rotate synchronously, further improving the gas distribution effect, and can also drive the horizontal branch pipe 1202 to stir the absorption liquid, thereby improving the uniformity of the absorption liquid and improving the absorption effect.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation to the present invention.

[0040] In this utility model, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to mechanical connection, direct connection, or indirect connection through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0041] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0042] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An environmentally friendly treatment system for wastewater produced by the production of erlotinib intermediates, characterized by: It includes a triethylamine recovery kettle (3), a condenser (9) and a tail gas absorber (10); The exhaust port (303) of the triethylamine recovery kettle (3) is connected to the shell side of the condenser (9), and the tail gas discharge port (901) of the condenser (9) is connected to the air inlet pipe (1001) of the tail gas absorber (10). A cooling and heating medium coil (301) is provided on the outside of the triethylamine recovery kettle (3), and a tail gas outlet (1002) is also provided at the top of the tail gas absorber (10).

2. An environmentally friendly treatment system for erlotinib intermediate production wastewater according to claim 1, characterized in that: The triethylamine recovery kettle (3) is provided with an agitator (305), and the agitator (305) is driven to rotate by a first rotating motor (304).

3. The environmentally friendly treatment system for erlotinib intermediate production wastewater according to claim 1, characterized in that: The bottom end of the triethylamine recovery kettle (3) is provided with a discharge port (302), a liquid separation observer (306) is installed on the discharge port (302), and a transparent observation window is provided on the liquid separation observer (306).

4. The environmentally friendly treatment system for erlotinib intermediate production wastewater according to claim 1, characterized in that: A vertically arranged gas guide pipe (1003) is rotatably installed in the exhaust gas absorber (10); the gas guide pipe (1003) is connected to the air intake pipe (1001) via a rotary joint (1005); the gas guide pipe (1003) is driven to rotate by a second rotating motor (1004); and a gas distribution mechanism is provided at the bottom end of the gas guide pipe (1003).

5. The environmentally friendly treatment system for erlotinib intermediate production wastewater according to claim 4, characterized in that: The gas distribution mechanism comprises a plurality of mounting brackets (11), a gas distribution box (12) being fixed to the top of the mounting brackets (11), the gas distribution box (12) being connected to the gas guide pipe (1003) via a connecting pipe (13), a plurality of vertical branch pipes (1201) being rotatably mounted on the top of the gas guide pipe (1003), a plurality of horizontal branch pipes (1202) being fixed to the outside of the vertical branch pipes (1201), and a gas outlet being provided on the horizontal branch pipes (1202).

6. The environmentally friendly treatment system for erlotinib intermediate production wastewater according to claim 5, characterized in that: A first spur gear (1203) is fixed to the outside of the vertical branch pipe (1201), and a second spur gear (1204) is rotatably installed between adjacent first spur gears (1203) on the gas distribution box (12), and the first spur gear (1203) and the second spur gear (1204) are meshed in sequence. A gear ring (14) is fixed to the inner wall of the top end of the exhaust absorber (10) through a bracket, and the first spur gear (1203) closest to the gas guide pipe (1003) is meshed with the gear ring (14).

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