CN219502689U - Energy-saving VDF cracking furnace system - Google Patents
Energy-saving VDF cracking furnace system Download PDFInfo
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- CN219502689U CN219502689U CN202223553737.5U CN202223553737U CN219502689U CN 219502689 U CN219502689 U CN 219502689U CN 202223553737 U CN202223553737 U CN 202223553737U CN 219502689 U CN219502689 U CN 219502689U
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Abstract
The utility model relates to an energy-saving VDF cracking furnace system, which comprises a cracking furnace, a heat exchanger and an air cooler, wherein the cracking furnace comprises a cracking furnace body, a support frame and a cracking tube are arranged in the cracking furnace body, the cracking tube surrounds the support frame from top to bottom, and a cracking furnace feed inlet and a cracking furnace discharge outlet are respectively arranged at the top and the bottom of the cracking tube; the heat exchanger is a U-shaped heat exchanger, the U-shaped heat exchanger comprises a tube side and a shell side, a discharge port of the tube side is communicated with a feed port of the cracking furnace, a discharge port of the shell side is communicated with an inlet end of an air cooler, the feed port of the shell side is communicated with a discharge port of the cracking furnace, and an outlet end of the air cooler is connected to a product collecting procedure; the high-temperature pyrolysis gas is cooled by the U-shaped tube heat exchanger and enters the air cooler, the material is cooled by the air until the next working procedure, the whole system does not adopt cooling liquid, the energy is saved, and meanwhile, the possibility that the cooling water contacts the material and serious corrosion is avoided.
Description
Technical Field
The utility model relates to a cracking furnace, in particular to an energy-saving VDF cracking furnace system.
Background
Vinylidene fluoride (CH 2CF 2), namely VDF, is one of the important monomers in the fluoride industry, and is mainly used for producing polyvinylidene fluoride and fluororubber, the preparation method of the vinylidene fluoride is more, and currently, 1-chloro-1, 1-difluoroethane (HCFC 142b or R142 a) is mainly used as a raw material in industry to prepare the vinylidene fluoride through high-temperature pyrolysis; the cracking reaction is usually carried out in a cracking furnace, after the cracking is finished, the product subjected to the cracking is required to be cooled by matching with a cooling system, the existing cooling system is usually cooled by cooling water, the cooling efficiency can be improved by cooling the cooling water, but the condition that the cooling water contacts materials exists, the possibility of serious corrosion can be generated in the condition, and production accidents are caused.
Disclosure of Invention
The utility model aims to provide an energy-saving VDF cracking furnace system, which solves the problem that a cooling structure in the VDF cracking furnace system can be corroded with materials.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an energy-saving VDF cracking furnace system, which comprises a cracking furnace, a heat exchanger and an air cooler, wherein the cracking furnace comprises a cracking furnace body, a supporting frame and a cracking tube are arranged in the cracking furnace body, the cracking tube surrounds the supporting frame from top to bottom, and a cracking furnace feed port and a cracking furnace discharge port are respectively arranged at the top and the bottom of the cracking tube; the heat exchanger is a U-shaped heat exchanger, the U-shaped heat exchanger comprises a tube side and a shell side, a discharge port of the tube side is communicated with a feed inlet of the cracking furnace, a discharge port of the shell side is communicated with an inlet end of the air cooler, the feed inlet of the shell side is communicated with a discharge port of the cracking furnace, and an outlet end of the air cooler is connected to a product collecting procedure.
Preferably, the air cooler is a fin type air cooler.
Preferably, a ceramic fiber folding cotton layer is arranged on the inner wall of the cracking furnace body.
Preferably, a heating belt is arranged on the ceramic fiber folding cotton layer, and the heating belt surrounds the ceramic fiber folding cotton layer.
Preferably, the furnace body is also provided with an air inlet pipe and an air outlet pipe for inert gas to enter and exit.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model relates to an energy-saving VDF cracking furnace system, which comprises a cracking furnace, a heat exchanger and an air cooler, wherein the cracking furnace comprises a cracking furnace body, a support frame and a cracking tube are arranged in the cracking furnace body, the cracking tube surrounds the support frame from top to bottom, and a cracking furnace feed port and a cracking furnace discharge port are respectively arranged at the top and the bottom of the cracking tube; the heat exchanger is a U-shaped heat exchanger, the U-shaped heat exchanger comprises a tube side and a shell side, a discharge hole of the tube side is communicated with a feed inlet of the cracking furnace, a discharge hole of the shell side is communicated with an inlet end of the air cooler, a feed inlet of the shell side is communicated with a discharge hole of the cracking furnace, an outlet end of the air cooler is connected to a product collecting procedure, the U-shaped tube heat exchanger is used for heating cold materials, uncleaved cold materials pass through the tube side, high-temperature cracked cold materials pass through the shell side, the temperature difference between cracked gas and the cold materials is large, the U-shaped heat exchange tube can be freely stretched, normal operation of the heat exchanger is guaranteed, the high-temperature cracked gas enters the air cooler after being cooled by the U-shaped tube heat exchanger, the air cooler is different from the existing cooling system, the whole system does not adopt cooling water, the possibility that the cooling water contacts the materials is avoided, and meanwhile, part of energy can be saved by using air.
Drawings
Some specific embodiments of the utility model will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic diagram of the structure of one embodiment of the present utility model;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;
fig. 3 is a schematic illustration of the circulation of a medium within a heat exchange tube.
Wherein reference numerals are as follows:
1. a pyrolysis furnace; 2. a heat exchanger; 3. fin type air cooler;
11. a pyrolysis furnace body; 12. a support frame; 13. a pyrolysis tube;
21. a discharge port of the tube side, 22, a feed port of the tube side; 23. a feed inlet of the shell side; 24. a discharge port of the shell side; 25. u-shaped pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 and 2, the utility model comprises a cracking furnace 1, a heat exchanger 2 and an air cooler, wherein the cracking furnace 1 comprises a cracking furnace body 11, a support frame 12 and a cracking tube 13 are arranged in the cracking furnace body 11, the cracking tube 13 surrounds the support frame 12 from top to bottom, and a charging port of the cracking furnace 1 and a discharging port of the cracking furnace 1 are respectively arranged at the top and the bottom of the cracking tube 13; the heat exchanger 2 is a U-shaped heat exchanger 2, the U-shaped heat exchanger 2 comprises a tube side and a shell side, a discharge hole 21 of the tube side is communicated with a feed inlet of the cracking furnace 1, a discharge hole 24 of the shell side is communicated with an inlet end of an air cooler, a feed inlet 23 of the shell side is communicated with a discharge hole of the cracking furnace 1, an outlet end of the air cooler is connected to a product collecting procedure, so that media firstly enter the feed inlet 22 of the tube side, firstly pass through the feed inlet of the cracking tube 13 after being heated in advance in the tube side, then pass through the surrounding cracking tube 13 for cracking, then exit from the discharge hole, enter the feed inlet 23 of the shell side, flow in the shell side and realize heat exchange with uncleaved media, firstly, the temperature of the uncleaved media is reduced, secondly, the media subjected to heat exchange enter the inlet end of the air cooler, the media are further cooled, and the media enter the product collecting procedure after being cooled to a proper temperature.
The heat exchanger 2 is a U-shaped heat exchanger, and because the temperature difference between the cracked gas and the medium before cracking is large, the heat exchanger 2 with other structures is easy to deform, but the U-shaped pipe 25 is not fixed with the inner wall of the heat exchanger 2, and can freely stretch and retract, so that the normal operation of the heat exchanger 2 is ensured.
The air cooler is a fin type air cooler 3, the fin type air cooler 3 belongs to a type of reinforced heat exchange heat exchanger, heat transfer of the air side is reinforced mainly by virtue of outer fins of a pipe, air is forced to pass through the outer fins of the pipe through a fan, heat of medium in the pipe is taken away by ambient air, the temperature of the medium is reduced, cooling by using air is avoided, cooling by using cold area liquid is avoided, and the possibility that the cooling liquid contacts with materials is avoided.
The cracking furnace is characterized in that a ceramic fiber folding cotton layer is arranged on the inner wall of the cracking furnace body 11, a heating belt is arranged on the ceramic fiber folding cotton layer, the heating belt surrounds the ceramic fiber folding cotton layer, the ceramic fiber folding cotton layer is used for heat preservation in the furnace body, the heating belt is used for heating the furnace body, the heating power of an electric heating system is automatically adjusted according to the temperature of a furnace chamber, and the temperature of the furnace chamber and the cracking temperature are automatically controlled.
The furnace body is also provided with an air inlet pipe and an air outlet pipe for inert gas to enter and exit, and the inert gas enters the furnace body to ensure that the furnace body is in a stable state, so that the cracking pipe 13 can work normally.
During specific work, the uncleaved medium is preheated through the U-shaped tube heat exchanger 2, the preheated medium enters the cracking tube 13 for cracking, cracked gas enters the U-shaped tube heat exchanger 2 for precooling, the precooled gas enters the air cooler for continuous cooling, and finally the gas enters the product collecting procedure.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.
Claims (3)
1. The energy-saving VDF cracking furnace system is characterized by comprising a cracking furnace, a heat exchanger and an air cooler, wherein the cracking furnace comprises a cracking furnace body, a supporting frame and a cracking tube are arranged in the cracking furnace body, the cracking tube surrounds the supporting frame from top to bottom, and a cracking furnace feed port and a cracking furnace discharge port are respectively arranged at the top and the bottom of the cracking tube; the heat exchanger is a U-shaped heat exchanger, the U-shaped heat exchanger comprises a tube side and a shell side, a discharge port of the tube side is communicated with a feed port of the cracking furnace, a discharge port of the shell side is communicated with an inlet end of an air cooler, the feed port of the shell side is communicated with a discharge port of the cracking furnace, and an outlet end of the air cooler is connected to a product collecting procedure;
the air cooler is a fin type air cooler;
the inner wall of the cracking furnace body is provided with a ceramic fiber folding cotton layer.
2. An energy efficient VDF pyrolysis furnace system according to claim 1, wherein: the heating belt is arranged on the ceramic fiber folding cotton layer, and the heating belt surrounds the ceramic fiber folding cotton layer.
3. An energy efficient VDF pyrolysis furnace system according to claim 1, wherein: and the furnace body is also provided with an air inlet pipe and an air outlet pipe for inert gas to enter and exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223553737.5U CN219502689U (en) | 2022-12-30 | 2022-12-30 | Energy-saving VDF cracking furnace system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223553737.5U CN219502689U (en) | 2022-12-30 | 2022-12-30 | Energy-saving VDF cracking furnace system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219502689U true CN219502689U (en) | 2023-08-11 |
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ID=87523593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223553737.5U Active CN219502689U (en) | 2022-12-30 | 2022-12-30 | Energy-saving VDF cracking furnace system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219502689U (en) |
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2022
- 2022-12-30 CN CN202223553737.5U patent/CN219502689U/en active Active
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