CN216081110U - Waste heat reutilization device and methylaniline preparation system - Google Patents
Waste heat reutilization device and methylaniline preparation system Download PDFInfo
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- CN216081110U CN216081110U CN202121291737.5U CN202121291737U CN216081110U CN 216081110 U CN216081110 U CN 216081110U CN 202121291737 U CN202121291737 U CN 202121291737U CN 216081110 U CN216081110 U CN 216081110U
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Abstract
The utility model discloses a waste heat recycling device and a preparation system of methylaniline, wherein the waste heat recycling device comprises a steam inlet pipeline, a preheater, a steam return pipeline, a steam return collecting tank and a hot water supply pipeline; the first steam inlet end of the steam inlet pipeline is used for being communicated with a steam outlet of a reduction device in the methylaniline preparation system, and the steam outlet end of the steam inlet pipeline is communicated with a steam inlet of the preheater; the steam inlet end and the steam outlet end of the steam return pipeline are respectively communicated with a steam outlet of the preheater and a steam inlet of the steam return collecting tank; the water inlet end of the hot water supply pipeline is communicated with the water outlet of the steam return collecting tank, and the water outlet end of the hot water supply pipeline is communicated with a pipeline heat-insulating jacket of a refining device in the methylaniline preparation system. In the technical scheme provided by the utility model, a large amount of steam waste heat is utilized to carry out heat preservation on the toluidine refining jacket during the reduction reaction, and the flow design is optimized by configuring a recovery device so as to improve the waste heat utilization rate, reduce the production cost and improve the economic benefit and the social benefit.
Description
Technical Field
The utility model relates to the technical field of chemical industry, in particular to a waste heat recycling device and a preparation system of methylaniline.
Background
In the p-methylaniline industry, a large amount of steam is used to heat the preheater during the reduction reaction, and a large amount of waste heat is generated. In the traditional method, the heat is generally radiated by a condenser and then changed into condensed water for recycling, so that the heat energy is wasted. In the refining process of the p-methylaniline, external steam is needed for pipeline heat preservation to prevent the solidification of the material (the refining pipeline is usually provided with a jacket), and the temperature of the material is increased (the solidifying point of the p-methylaniline is 43 ℃).
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a waste heat recycling device and a preparation system of methylaniline, and aims to effectively utilize the waste heat of steam in the reduction reaction.
In order to achieve the purpose, the utility model provides a waste heat recycling device for a methylaniline preparation system, which comprises a steam inlet pipeline, a preheater, a steam return pipeline, a steam return collecting tank and a hot water supply pipeline;
the first steam inlet end of the steam inlet pipeline is used for being communicated with a steam outlet of a reduction device in the methylaniline preparation system, and the steam outlet end of the steam inlet pipeline is communicated with a steam inlet of the preheater;
the steam inlet end and the steam outlet end of the steam return pipeline are respectively communicated with the steam outlet of the preheater and the steam inlet of the steam return collecting tank;
the water inlet end of the hot water supply pipeline is communicated with the water outlet of the steam return collecting tank, and the water outlet end of the hot water supply pipeline is communicated with a pipeline heat-insulating jacket of a refining device in the methylaniline preparation system.
Optionally, the steam inlet pipeline has a second steam inlet end, and the second steam inlet end of the steam inlet pipeline is used for communicating with an external steam source.
Optionally, a hot water delivery pump is disposed on the hot water supply pipeline.
Optionally, the preheater is arranged to heat steam to 95 ℃.
Optionally, the return steam collection tank is arranged to heat the water to 85 ℃ by steam.
The utility model also provides a preparation system of the methylaniline, which comprises the waste heat recycling device.
Optionally, the system further comprises a reduction device and a refining device, wherein the refining device is provided with a pipeline heat-preservation jacket; a first steam inlet end of a steam inlet pipeline in the waste heat recycling device is communicated with a steam outlet of the reduction device; and the water outlet end of the hot water supply pipeline in the waste heat reutilization device is communicated with the water inlet of the pipeline heat-insulation jacket.
Optionally, a water outlet of the pipeline heat-insulating jacket is communicated with a condensed water inlet of the reduction device.
In the technical scheme provided by the utility model, a large amount of steam waste heat is utilized to carry out heat preservation on the toluidine refining jacket during the reduction reaction, and the flow design is optimized by configuring a recovery device so as to improve the waste heat utilization rate, reduce the production cost and improve the economic benefit and the social benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a waste heat recycling device provided in the present invention;
the reference numbers illustrate: the system comprises an air inlet pipeline 1, a preheater 2, an air return pipeline 3, an air return collecting tank 4, a hot water supply pipeline 5, a hot water delivery pump 51 and a pipeline heat-insulating jacket 6.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a preparation system of methylaniline, which comprises a waste heat recycling device, as shown in figure 1, wherein the waste heat recycling device comprises a steam inlet pipeline 1, a preheater 2, a steam return pipeline 3, a steam return collecting tank 4 and a hot water supply pipeline 5.
The system for preparing methylaniline usually also comprises a reduction device and a refining device, as shown in fig. 1, a first steam inlet end of a steam inlet pipeline 1 is communicated with a steam outlet of the reduction device, and a steam outlet end of the steam inlet pipeline 1 is communicated with a steam inlet of a preheater 2. The reduction unit generates a large amount of steam during the reduction reaction, and the steam can enter the preheater 2 through the steam inlet line 1 and be heated to a first preset temperature, for example, in the embodiment, the preheater 2 is configured to heat the steam to 95 ℃.
As shown in fig. 1, the steam inlet and the steam outlet of the steam return pipeline 3 are respectively communicated with the steam outlet of the preheater 2 and the steam inlet of the steam return collecting tank 4. The steam heated by the preheater 2 enters the return steam collecting tank 4 through the return steam pipeline 3, and heats the water in the return steam collecting tank 4 to a second preset temperature, for example, in the embodiment, the return steam collecting tank 4 is configured to heat the water to 85 ℃ through the steam, and the temperature of the steam is reduced from 95 ℃ to 85 ℃ after the steam enters the return steam collecting tank 4, and the temperature is reduced by about 10 ℃.
As shown in figure 1, the water inlet end of the hot water supply pipeline 5 is communicated with the water outlet of the steam-return collecting tank 4, and the water outlet end of the hot water supply pipeline 5 is communicated with the pipeline heat-preservation jacket 6 of the refining device. Wherein, a hot water supply pipeline 5 is provided with a hot water delivery pump 51, and hot water at about 85 ℃ in the return steam collecting tank 4 is delivered to a pipeline heat-insulating jacket 6 of the methylaniline refining pipeline by the pump for heat insulation.
In addition, in this embodiment, the water outlet of the pipe thermal insulation jacket 6 is communicated with the condensed water inlet of the reduction device, and the condensed water after thermal insulation of the pipe thermal insulation jacket 6 can be recycled to the reduction device.
In the technical scheme provided by the utility model, a large amount of steam waste heat is utilized to carry out heat preservation on the toluidine refining jacket during the reduction reaction, and the flow design is optimized by configuring a recovery device so as to improve the waste heat utilization rate, reduce the production cost and improve the economic benefit and the social benefit.
Optionally, in this embodiment, the steam inlet pipeline 1 has a second steam inlet end, and the second steam inlet end of the steam inlet pipeline 1 is used for communicating with an external steam source, so that when the amount of steam generated by the reduction reaction is insufficient, the supply amount of steam can be ensured by the external steam source.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A waste heat reutilization device is used for a preparation system of methylaniline and is characterized by comprising a steam inlet pipeline, a preheater, a steam return pipeline, a steam return collecting tank and a hot water supply pipeline;
the first steam inlet end of the steam inlet pipeline is used for being communicated with a steam outlet of a reduction device in the methylaniline preparation system, and the steam outlet end of the steam inlet pipeline is communicated with a steam inlet of the preheater;
the steam inlet end and the steam outlet end of the steam return pipeline are respectively communicated with the steam outlet of the preheater and the steam inlet of the steam return collecting tank;
the water inlet end of the hot water supply pipeline is communicated with the water outlet of the steam return collecting tank, and the water outlet end of the hot water supply pipeline is communicated with a pipeline heat-insulating jacket of a refining device in the methylaniline preparation system.
2. The waste heat recycling device of claim 1, wherein the steam inlet pipe has a second steam inlet end, and the second steam inlet end of the steam inlet pipe is used for being communicated with an external steam source.
3. The waste heat recycling device according to claim 1, wherein a hot water feed pump is provided on the hot water supply line.
4. The waste heat recovery device of claim 1, wherein the preheater is configured to heat steam to 95 ℃.
5. The waste heat recovery device of claim 1, wherein the return steam collection tank is configured to heat the water to 85 ℃ with steam.
6. A system for producing methylaniline, comprising the residual heat recycling apparatus according to any one of claims 1 to 5.
7. The system for producing methylaniline according to claim 6 further comprising a reduction apparatus and a refining apparatus, wherein the refining apparatus is provided with a pipe heat-insulating jacket;
a first steam inlet end of a steam inlet pipeline in the waste heat recycling device is communicated with a steam outlet of the reduction device;
and the water outlet end of the hot water supply pipeline in the waste heat reutilization device is communicated with the water inlet of the pipeline heat-insulation jacket.
8. The system for preparing methylaniline according to claim 7, wherein a water outlet of the pipeline heat-insulating jacket is communicated with a condensed water inlet of the reduction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121291737.5U CN216081110U (en) | 2021-06-10 | 2021-06-10 | Waste heat reutilization device and methylaniline preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121291737.5U CN216081110U (en) | 2021-06-10 | 2021-06-10 | Waste heat reutilization device and methylaniline preparation system |
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| Publication Number | Publication Date |
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| CN216081110U true CN216081110U (en) | 2022-03-18 |
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| CN202121291737.5U Active CN216081110U (en) | 2021-06-10 | 2021-06-10 | Waste heat reutilization device and methylaniline preparation system |
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- 2021-06-10 CN CN202121291737.5U patent/CN216081110U/en active Active
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