A stripping tower for epoxy resin

Abstract

This application discloses a stripping tower for epoxy resin, comprising a liquid phase collection tower bottom, a separation tower body, and a gas phase collection tower top. The separation tower body has a material distribution layer and a steam distribution layer installed sequentially from top to bottom. Material nozzles on the material distribution layer and steam nozzles on the steam distribution layer are arranged opposite each other. The sulfide, potassium brine, and epoxy materials to be separated are fed into the separation tower body from the top and pressurized. After being pressurized with steam from the bottom steam distribution layer, they are ejected through the steam nozzles and material nozzles, rapidly evaporating the components with lower boiling points into gases, thus completing the stripping process. This application separates the mixture into smaller droplets, which, upon rapid contact with steam, evaporate the gases with lower boiling points. These droplets can then quickly pass through the material distribution layer for condensation and reuse. During the stripping process, the heat exchange rate is high, and the gas flow efficiency is high. The tower pressure can be appropriately reduced to lower the steam temperature and consumption, thereby achieving energy savings.

Description

Technical Field

[0001] This utility model relates to the field of pesticide intermediate production technology, and in particular to a stripping tower for epoxy resin. Background Technology

[0002] Epoxy (2-[2-(4-chlorophenyl)ethyl]-2-(1,1-dimethylethyl)-epoxyethylene) is an intermediate of the triazole fungicide tebuconazole. Currently, the main production method of epoxy is to use p-chlorobenzaldehyde as the main raw material, which is processed through condensation, hydrogenation and cyclization, and then purified. The main energy consumption in the production process is steam consumption, with each ton of steam consuming the equivalent of 0.437 tons of standard coal.

[0003] In the stripping process of epoxy resin, sulfide, potassium brine, and epoxy materials enter the tower at the top and come into contact with steam. The components with lower boiling points evaporate into gas, while the components with higher boiling points remain liquid. The gas rises to the top of the tower as exhaust gas, which is then condensed in a condenser and recovered to the sulfide receiving tank for reuse. The liquid is collected at the bottom of the tower for further separation. Improving steam utilization efficiency during this process can reduce steam consumption. Therefore, we propose a stripping tower for epoxy resin to address these issues. Utility Model Content

[0004] This application provides a stripping tower for epoxy resin production, which can reduce the amount of steam used in the epoxy resin production process, thereby reducing production energy consumption.

[0005] This application provides a stripping tower for epoxy resin, comprising a liquid phase collection tower bottom, a separation tower body, and a gas phase collection tower top. The separation tower body is provided with a material distribution layer and a steam distribution layer from top to bottom, and the material nozzles on the material distribution layer and the steam nozzles on the steam distribution layer are arranged opposite to each other.

[0006] Preferably, a buffer layer is provided between the material distribution layer and the steam distribution layer.

[0007] Preferably, the buffer layer includes a buffer groove fixed inside the separation tower body by a mounting rod.

[0008] Preferably, the edges of the buffer groove are serrated.

[0009] Preferably, the bottom of the buffer groove is arc-shaped.

[0010] Preferably, the steam distribution layer includes an external steam connection pipe for connecting to an external steam pipeline and a steam distribution pipe connected to the external steam connection pipe, and the steam nozzle is connected to the steam distribution pipe through a steam distribution branch pipe; The corresponding material distribution layer includes a material connecting pipe for connecting materials and a material distribution pipe connected to the material connecting pipe, and the material nozzle is connected to the material distribution pipe through a material distribution branch pipe.

[0011] Preferably, both the steam nozzle and the material nozzle are umbrella-shaped nozzles.

[0012] Preferably, the bottom of the liquid phase collection tower, the body of the separation tower, and the top of the gas phase collection tower are all provided with heat insulation layers.

[0013] Preferably, a demister plate is also installed inside the top of the gas collection tower.

[0014] As can be seen from the above technical solution, this application provides a stripping tower for epoxy resin. In use, the sulfide, potassium brine, and epoxy materials to be separated are fed into the separation tower from the top and pressurized. After being pressurized, they are sprayed out through steam nozzles and material nozzles, which can quickly bring the mixture and steam into contact. After being pressurized and sprayed out, the droplets of the mixture are small, which can quickly evaporate the components with lower boiling points into gas, while the components with higher boiling points remain in liquid state. The gas passes through the material distribution layer and rises to the top of the gas phase collection tower, becoming the tower exhaust gas. After being condensed by the condenser, it is recovered to the sulfide receiving tank for reuse. The liquid is collected at the bottom of the liquid phase collection tower and the separation process continues.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up material distribution layer and steam distribution layer, epoxy mixture and steam can be evenly distributed in the separation tower body, thereby improving heat exchange efficiency. In addition, the material distribution layer and steam distribution layer have little impact on gas flow efficiency, and the tower pressure can be appropriately reduced. 2. By setting up steam nozzles and material nozzles, the contact efficiency between steam and the mixture can be improved, thereby achieving rapid separation of low-boiling-point sulfides and improving stripping efficiency.

[0016] In summary, this application separates the mixture into smaller droplets, which evaporate after rapid contact with steam at their lowest boiling points. These droplets can then quickly pass through the material distribution layer for condensation and reuse. During the stripping process, the heat exchange rate is high and the gas flow efficiency is high, which can appropriately reduce the tower pressure to reduce the steam temperature and usage, thereby achieving the goal of energy saving. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0018] Figure 1This is a schematic diagram of the external structure of a stripping tower for epoxy resin according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a stripping tower for epoxy resin according to the present invention; Figure 3 This is a schematic diagram of the installation structure of the steam distribution layer and material connection pipe of the stripping tower for epoxy resin proposed in this utility model. In the diagram: 1. Bottom of liquid phase collection tower; 2. Separation tower body; 3. Steam distribution layer; 31. External steam connection pipe; 32. Steam distribution pipe; 33. Steam distribution branch pipe; 34. Steam nozzle; 4. Buffer layer; 41. Mounting rod; 42. Buffer tank; 5. Material distribution layer; 51. Material connection pipe; 52. Material distribution pipe; 53. Material distribution branch pipe; 54. Material nozzle; 6. Top of gas phase collection tower; 7. Demister plate. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0020] See Figure 1-3An epoxy stripping tower includes a liquid phase collection tower bottom 1, a separation tower body 2, and a gas phase collection tower top 6. This application aims to reduce the amount of steam used to separate sulfides in epoxy mixtures. The boiling point of sulfides differs significantly from that of potassium brine and epoxy materials; therefore, a smaller amount of steam can be used to separate and reuse sulfides. Specifically, the separation tower body 2 is equipped with a material distribution layer 5 and a steam distribution layer 3 from top to bottom. The mixture is added from the top and moves downwards, while steam is introduced from the bottom and moves upwards, completing convection and rapidly separating sulfides. Material nozzles 54 on the material distribution layer 5 and steam nozzles 34 on the steam distribution layer 3 are arranged opposite each other. Both nozzles can be umbrella-shaped to quickly pass smaller amounts of liquid mixture through the steam, separating the sulfides and allowing them to move upwards. The temperature field between the material distribution layer 5 and the steam distribution layer 3 is higher at the bottom and lower at the top, causing droplets to pass through the steam... The steam distribution layer 3 can quickly separate sulfides. During the upward movement of the gas, the sprayed mixture comes into contact with other gases, liquefying them and ensuring the purity of the sulfides. Thus, the separation of sulfides is completed quickly within the separation tower 2. During the separation process, since the pressure drop of the gas flow is small, the amount and temperature of steam can be appropriately reduced to complete the separation of sulfides. Furthermore, a demister plate 7 can be installed in the top 6 of the gas phase collection tower. It is worth noting that the temperature of the demister plate 7 is slightly higher than the boiling point of sulfides but lower than the boiling point of other materials, thereby performing secondary purification of the vaporized sulfides. The temperature field of the demister plate 7 and the stripping tower can be monitored by a temperature sensor, as detailed in the prior art. It should be understood that this application can also adjust the amount of steam in the steam distribution layer 3 according to the flow rate of the material distribution layer 5, achieving the purpose of reducing energy consumption and improving stripping quality through dynamic monitoring.

[0021] In this invention, a convection + spraying method is adopted for vaporization separation, which has a high vaporization efficiency. Therefore, a buffer layer 4 is also provided between the material distribution layer 5 and the steam distribution layer 3. When the amount of steam in the steam distribution layer 3 is large, the pre-liquefied epoxy and brine are aggregated into larger droplets and pass through the steam distribution layer 3. Specifically, the buffer layer 4 includes a buffer tank 42 fixed inside the separation tower body 2 by a mounting rod 41. The collected droplets fall into the buffer tank 42, and while absorbing heat to evaporate the sulfide, they are discharged from the buffer tank 42 through overflow and fall into the bottom 1 of the liquid phase collection tower. Furthermore, the edge of the buffer tank 42 is serrated, and the liquid drips out from the gaps between the teeth, improving the uniformity of the droplets. When passing through the steam distribution layer 3, the sulfide can be vaporized again, improving the separation quality. The bottom of the buffer tank 42 is arc-shaped to reduce the influence of steam flow. The steam can also be re-aggregated in the buffer tank 42 and exchange heat with the droplets passing through the buffer tank 42, further evaporating the sulfide, thereby improving the separation efficiency and quality.

[0022] In this utility model, the steam distribution layer 3 includes an external steam connection pipe 31 for connecting to an external steam pipe and a steam distribution pipe 32 connected to the external steam connection pipe 31. The steam nozzle 34 is connected to the steam distribution pipe 32 through a steam distribution branch pipe 33. The external steam connection pipe 31 is connected to an external steam pipe for introducing steam into this application. It should be understood that the pipe is equipped with a valve for controlling the closure of the pipe and the control of the flow rate. The corresponding material distribution layer 5 includes a material connecting pipe 51 for connecting materials and a material distribution pipe 52 connected to the material connecting pipe 51. The material nozzle 54 is connected to the material distribution pipe 52 through the material distribution branch pipe 53. The pipeline of the mixture of sulfide, potassium brine, epoxy and other materials coming down from the previous stage is connected to the material connecting pipe 51 and enters the stripping tower through the material distribution pipe 52 and the material nozzle 54. The steam nozzle 34 and the material nozzle 54 are both umbrella-shaped nozzles. The mixture and steam enter the stripping tower by spraying. The mixture comes into rapid contact with the steam to achieve the purpose of rapid heat exchange and vaporization of sulfide. This not only has high processing efficiency, but also reduces the amount of steam used. Furthermore, since this application is installed in a factory, and in order to reduce heat loss in the stripping tower, the bottom 1 of the liquid phase collection tower, the body 2 of the separation tower, and the top 6 of the gas phase collection tower are all provided with heat insulation layers. The inside of the heat insulation layer is insulation cotton, and the outside is tin foil material, which wraps the above structures to achieve the purpose of heat insulation.

[0023] As can be seen from the above technical solution, when this application is used, the sulfide, potassium salt water and epoxy materials to be separated are fed into the separation tower 2 from the top and pressurized. After being pressurized with the steam in the steam distribution layer 3 at the bottom, they are sprayed out through the steam nozzle 34 and the material nozzle 54, which can quickly bring the mixture into contact with the steam. After the mixture is pressurized and sprayed out, the droplet mass is small, which can quickly evaporate the components with lower boiling points into gas, while the components with higher boiling points remain in liquid state. The gas passes through the material distribution layer and rises to the top 6 of the gas phase collection tower, becoming the tower exhaust gas. After being condensed by the condenser, it is recovered to the sulfide receiving tank for use. The liquid is collected at the bottom 1 of the liquid phase collection tower and the separation process continues.

[0024] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0025] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. An epoxy stripping column comprising a liquid phase collection column bottom (1), a separation column body (2) and a gas phase collection column top (6), characterized in that: The separation tower body (2) is equipped with a material distribution layer (5) and a steam distribution layer (3) from top to bottom. The material nozzles (54) on the material distribution layer (5) and the steam nozzles (34) on the steam distribution layer (3) are arranged opposite to each other.

2. A stripping column for epoxy according to claim 1, characterized in that A buffer layer (4) is also provided between the material distribution layer (5) and the steam distribution layer (3).

3. A stripping column for epoxy according to claim 2, characterized in that The buffer layer (4) includes a buffer groove (42) fixed inside the separation tower body (2) by a mounting rod (41).

4. A stripping column for epoxy according to claim 3, characterized in that The edges of the buffer groove (42) are serrated.

5. A stripping column for epoxy according to claim 4, characterized in that The bottom of the buffer groove (42) is arc-shaped.

6. The stripping column for epoxy according to claim 1, wherein The steam distribution layer (3) includes an external steam connection pipe (31) for connecting to an external steam pipe and a steam distribution pipe (32) connected to the external steam connection pipe (31). The steam nozzle (34) is connected to the steam distribution pipe (32) through a steam distribution branch pipe (33). The corresponding material distribution layer (5) includes a material connecting pipe (51) for connecting materials and a material distribution pipe (52) connected to the material connecting pipe (51). The material nozzle (54) is connected to the material distribution pipe (52) through a material distribution branch pipe (53).

7. A stripping column for epoxy according to claim 6, characterized in that Both the steam nozzle (34) and the material nozzle (54) are umbrella-shaped nozzles.

8. The stripping column for epoxy according to claim 1, wherein The bottom (1) of the liquid phase collection tower, the body (2) of the separation tower, and the top (6) of the gas phase collection tower are all provided with heat insulation layers.

9. A stripping tower for epoxy resin according to claim 1, characterized in that, A demister plate (7) is also installed inside the top (6) of the gas collection tower.

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