CN219252557U - External-compensation reformate heat exchange system of aromatic hydrocarbon combined device - Google Patents
External-compensation reformate heat exchange system of aromatic hydrocarbon combined device Download PDFInfo
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- CN219252557U CN219252557U CN202223453984.8U CN202223453984U CN219252557U CN 219252557 U CN219252557 U CN 219252557U CN 202223453984 U CN202223453984 U CN 202223453984U CN 219252557 U CN219252557 U CN 219252557U
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Abstract
The utility model belongs to the field of chemical industry, and particularly relates to an external repair reforming oil heat exchange system of an aromatic hydrocarbon combined device, which comprises an external repair reforming oil pipeline and a reforming oil heat exchange pipeline; an outlet of the external repair reformate pipeline is connected to a reformate heat exchange pipeline, the reformate heat exchange pipeline is sequentially connected with a reformate steam heater, a xylene deoxidizing tower and an external repair reformate heat exchanger, and an outlet of the reformate heat exchange pipeline is connected to a reformate tower; and the external-repair reformate heat exchanger is connected with an outlet pipeline of the finished product tower. According to the utility model, the temperature of the externally-supplemented reformate is raised by the material at the outlet of the xylene product finished product tower, so that the heat is reused, and the aim of saving energy consumption can be achieved.
Description
Technical Field
The utility model belongs to the field of chemical industry, and particularly relates to an external repair and reforming oil heat exchange system of an aromatic hydrocarbon combined device.
Background
According to the production process of the aromatic hydrocarbon combined device, because the temperature of the external-compensation reformed oil material is low, the material needs to be fed after heat exchange by a heat exchanger, if an independent heat exchange system is arranged for the external-compensation reformed oil material to heat the external-compensation reformed oil material, the pipeline arrangement is complicated, and particularly when the external-compensation material is more, the energy consumption is higher.
Disclosure of Invention
According to the defects of the prior art, the utility model aims to provide an external repair reformate heat exchange system of an aromatic hydrocarbon combined device, which exchanges heat between the outlet material of a heat exchanger at the bottom of a finished product tower and the external repair reformate of an N7 boundary region, recycles heat and can achieve the aim of saving energy consumption.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the external repair reforming oil heat exchange system of the aromatic hydrocarbon combined device comprises an external repair reforming oil pipeline and a reforming oil heat exchange pipeline; an outlet of the external repair reformate pipeline is connected to a reformate heat exchange pipeline, the reformate heat exchange pipeline is sequentially connected with a reformate steam heater, a xylene deoxidizing tower and an external repair reformate heat exchanger, and an outlet of the reformate heat exchange pipeline is connected to a reformate tower; and the external-repair reformate heat exchanger is connected with an outlet pipeline of the finished product tower.
Further, the external-repair reformate heat exchanger is connected to the outlet pipeline of the finished product tower through an external-repair reformate heat exchanger inlet pipeline and an external-repair reformate heat exchanger outlet pipeline, a heat exchange bypass valve is arranged on the outlet pipeline of the finished product tower, the external-repair reformate heat exchanger inlet pipeline is connected to the front of the heat exchange bypass valve, the external-repair reformate heat exchanger outlet pipeline is connected to the rear of the heat exchange bypass valve, an inlet valve is arranged on the external-repair reformate heat exchanger inlet pipeline, and an outlet valve is arranged on the external-repair reformate heat exchanger outlet pipeline.
Further, the reformate heat exchange pipeline is connected with the shell side of the external-complement reformate heat exchanger, and the inlet pipeline of the external-complement reformate heat exchanger and the outlet pipeline of the external-complement reformate heat exchanger are connected with the tube side of the external-complement reformate heat exchanger.
Further, the outlet pipeline of the finished product tower is connected to the bottom outlet of the finished product tower of the xylene product, the bottom outlet of the finished product tower of the xylene product is provided with an outlet valve, the outlet pipeline of the finished product tower is sequentially connected with a finished product bottom pump, a finished product tower heat exchanger, a finished product tower top air cooler and a p-xylene product aftercooler after the outlet valve, and the outlet of the outlet pipeline of the finished product tower is connected to a PX product inspection tank; and an adjusting valve group is arranged at the outlet of the outlet pipeline of the finished product tower, and the heat exchange bypass valve is arranged between the heat exchanger of the finished product tower and the air cooler at the top of the finished product tower.
Further, the product column outlet line is provided with an outlet leg connected to the raffinate column side surge tank and the adsorption feed surge tank.
Further, the reformate tower is provided with a reformate tower heat exchanger, an outlet of the reformate heat exchange pipeline is connected to the reformate tower heat exchanger, and the reformate tower is connected to the reformate tower after heat exchange by the reformate tower heat exchanger.
Furthermore, the inlet of the reformate steam heater is provided with a regulating valve group, the reformate heat exchange pipeline is connected with an external reformate filter in front of the regulating valve group, the reformate heat exchange pipeline is provided with a filter bypass valve, the external reformate filter is connected with the reformate heat exchange pipeline through a filter inlet pipeline and a filter outlet pipeline, the filter inlet pipeline is connected with the front of the filter bypass valve, and the filter outlet pipeline is connected with the rear of the filter bypass valve.
Further, the xylene deoxidizing tower is provided with a xylene deoxidizing tower heat exchanger, and the reformate heat exchange pipeline is connected with the xylene deoxidizing tower after heat exchange of the xylene deoxidizing tower heat exchanger.
Further, the inlet of the xylene deoxidizing tower is connected with the tube side of the xylene deoxidizing tower heat exchanger, and the outlet of the xylene deoxidizing tower is connected with the shell side of the xylene deoxidizing tower heat exchanger.
Furthermore, the reforming oil heat exchange pipeline is provided with a regulating valve group on the front road of the external repair reforming oil heat exchanger, the reforming oil heat exchange pipeline is provided with a crossing pipeline on the front road of the regulating valve group, the crossing pipeline is used for leading out the external repair reforming oil, and the crossing pipeline is provided with the regulating valve group.
The beneficial effects of the utility model are as follows: the material at the outlet of the xylene product finished product tower is externally supplemented with reformate to heat, so that the heat is reused, and the aim of saving energy consumption can be achieved.
Drawings
FIG. 1 is a process flow diagram of an external-supply reformate heat exchange system of an aromatic hydrocarbon combination unit of the utility model:
in the figure: 1. an external reforming oil pipeline, 2, a reforming oil steam heater, 3, a xylene deoxidizing tower, 4, an external reforming oil heat exchanger, 5, a crossing pipeline, 6, a xylene product finished product tower, 7, a finished product tower outlet pipeline, 8, an external reforming oil heat exchanger inlet pipeline, 9, an external reforming oil heat exchanger outlet pipeline, 11, a heat exchange bypass valve, 12, an inlet valve, 13, an outlet valve, 14, a finished product tower bottom pump, 15, a finished product tower heat exchanger, 16, a finished product tower top air cooler, 17, a para-xylene product aftercooler, 18, an outlet branch pipe, 19, a reforming oil tower heat exchanger, 20, an external reforming oil filter, 21, a filter bypass valve, 22, a xylene deoxidizing tower heat exchanger, FV1-FV5 and a regulating valve group;
A. PX product inspection tank, B, raffinate tower side line buffer tank, C, adsorption feed buffer tank, D, reformate tower, E, disproportionation stabilizer, F, heavy aromatic tower, G, depentanizer bottom heat exchanger, H, deheptanizer, I, from/to C9 storage tank, J, mixed aromatic, K, external supply reformate (gridlines), L, refund reformate line, M, C/C7, N, external supply reformate (not gridlines).
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
Referring to fig. 1, an aromatic hydrocarbon combination unit external repair reformate heat exchange system comprises an external repair reformate pipeline 1 and a reformate heat exchange pipeline; the outlet of the external repair reformate pipeline 1 is connected to a reformate heat exchange pipeline, the reformate heat exchange pipeline is sequentially connected with a reformate steam heater 2, a xylene deoxidization tower 3 and an external repair reformate heat exchanger 4, and the outlet of the reformate heat exchange pipeline is connected to the reformate tower; the external-repair reformate heat exchanger 4 is connected with a finished product tower outlet pipeline 7.
Based on the technical scheme, after the externally-supplemented reformate enters the device, the advanced reformate steam heater 2 exchanges heat with 0.46MPA steam and then enters the xylene deoxidization tower 3.
Further, the external-repair reformate heat exchanger 4 is connected to the outlet pipeline 7 of the product tower through the inlet pipeline 8 of the external-repair reformate heat exchanger and the outlet pipeline 9 of the external-repair reformate heat exchanger, the outlet pipeline 7 of the product tower is provided with a heat exchange bypass valve 11, the inlet pipeline 8 of the external-repair reformate heat exchanger is connected to the front of the heat exchange bypass valve 11, the outlet pipeline 9 of the external-repair reformate heat exchanger is connected to the rear of the heat exchange bypass valve 11, the inlet pipeline 8 of the external-repair reformate heat exchanger is provided with an inlet valve 12, and the outlet pipeline 9 of the external-repair reformate heat exchanger is provided with an outlet valve 13.
Further, the reformate heat exchange pipeline is connected with the shell side of the external-repair reformate heat exchanger 4, and the external-repair reformate heat exchanger inlet pipeline 8 and the external-repair reformate heat exchanger outlet pipeline 9 are connected with the external-repair reformate heat exchanger tube side.
Further, the outlet pipeline 7 of the finished product tower is connected to the outlet of the bottom of the finished product tower 6 of the xylene product, the outlet valve UV1 is arranged at the outlet of the bottom of the finished product tower 6 of the xylene product, the outlet pipeline 7 of the finished product tower is sequentially connected with the bottom pump 14 of the finished product tower, the heat exchanger 15 of the finished product tower, the air cooler 16 of the top of the finished product tower and the aftercooler 17 of the para-xylene product after the outlet valve, and the outlet of the outlet pipeline 7 of the finished product tower is connected to the PX product inspection tank; the outlet of the outlet pipeline 7 of the finished product tower is provided with a regulating valve group FV1, and the heat exchange bypass valve 11 is arranged between the heat exchanger 15 of the finished product tower and the air cooler 16 at the top of the finished product tower.
Further, the outlet pipeline 7 of the finished product tower is provided with an outlet branch pipe 18, the outlet branch pipe 18 is connected to the side line buffer tank of the raffinate tower and the adsorption feed buffer tank, and the outlet branch pipe 18 is provided with a regulating valve group FV2.
Based on the above technical scheme, the medium of the outlet branch pipe 18 is PX, and during normal production, the flow of the outlet branch pipe to the buffer tank is closed, and only before shutdown and startup, the flow is changed to the buffer tank, and the C8 circulation of the system is established. The buffer tank is not involved in the reaction, and is one purpose of maintaining the material circulation of the device.
Further, the reformate tower is provided with a reformate tower heat exchanger 19, and an outlet of the reformate heat exchange pipeline is connected to the reformate tower heat exchanger 19, and is connected to the reformate tower after heat exchange by the reformate tower heat exchanger.
Further, an inlet of the reformate steam heater 19 is provided with a regulating valve bank FV3, a reformate heat exchange pipeline is connected with an external reformate filter 20 in front of the regulating valve bank FV3, a filter bypass valve 21 is arranged on the reformate heat exchange pipeline, the external reformate filter 20 is connected with the reformate heat exchange pipeline through a filter inlet pipeline and a filter outlet pipeline, the filter inlet pipeline is connected with the front of the filter bypass valve 21, the filter outlet pipeline is connected with the rear of the filter bypass valve 21, and both the inlet and the outlet of the external reformate filter 20 are controlled by valves.
Further, the xylene deoxidizing tower 3 is provided with a xylene deoxidizing tower heat exchanger 22, and the reformate heat exchange pipeline is connected with the xylene deoxidizing tower 3 after heat exchange of the xylene deoxidizing tower heat exchanger 22; the inlet of the xylene deoxidizing tower 3 is connected with the tube side of the xylene deoxidizing tower heat exchanger 22, and the outlet of the xylene deoxidizing tower 3 is connected with the shell side of the xylene deoxidizing tower heat exchanger 22.
Further, the reformate heat exchange pipeline is provided with a regulating valve bank FV4 on the front road of the external supplementing reformate heat exchanger 4, the reformate heat exchange pipeline is provided with a spanning pipeline 5 on the front road of the regulating valve bank FV4, the spanning pipeline 5 is connected to the reformate tower D1, and the spanning pipeline 5 is provided with the regulating valve bank FV5.
Based on the above technical scheme, the reformate tower D1 and the reformate tower D are not the same reaction tower, the system runs in two devices, and the two device flows are basically identical, but the flow of the reformate tower D1 and the reformate tower D is sent, and the reformate tower D1 connected across the pipeline belongs to the other device.
Working principle: as shown in figure 1, according to the fact that the outlet temperature of the tube side of the finished product tower heat exchanger 15 at the bottom of the finished product tower 6 for xylene products is higher, the temperature reaches about 144 ℃, the temperature is stable, the temperature of the finished product tower top air cooler 16 is set to 77 ℃ at present (the set temperature can be reduced after transformation), the temperature drop reaches at least 67 ℃, the temperature drop can be utilized to exchange heat with external reformed oil, but the finished product tower top air cooler 16 (containing variable frequency air cooling) and the para-xylene product aftercooler 17 continue to remain, when the external feed flow changes, the variable frequency air cooling can stabilize the temperature after cooling, the temperature of a tank removing area is ensured to be 30 ℃ and stable, and the variable frequency is lower than before, so that the purpose of saving electricity is achieved.
The working process comprises the following steps: confirm that the external reforming oil heat exchanger 4 and the relevant valve pipeline are put into service normally.
The flow is as follows: from external repair reformate line→external repair reformate filter→regulating valve group FV3→reformate steam heater→xylene deoxidizer heat exchanger (tube pass) →xylene deoxidizer→xylene deoxidizer heat exchanger (shell pass) →regulating valve group FV4→external repair reformate heat exchanger shell pass→reforming tower oil heat exchanger (shell pass) →reformate tower.
According to the temperature of 144 ℃ and stability of the tube side outlet of the heat exchanger 15 of the tower bottom of the finished product tower 6 of the xylene product, when the external-supplement reformate is introduced into the external-supplement reformate heat exchanger 4 for heat exchange, the external-supplement reformate enters the reformate tower, the inlet valve 12 and the outlet valve 13 are slowly opened (the clamping amount of the outlet valve 13 is used) when the external-supplement reformate is put into use, then the heat exchange bypass valve 11 is slowly closed, the temperature and the frequency conversion change after the frequency conversion air cooling in the air cooler 16 of the tower top of the finished product are observed, the temperature after the cooling is ensured to be not lower than 50 ℃, the temperature of the external-supplement reformate entering the PX inspection tank is lower than 40 ℃, and the temperature can be adjusted by the inlet and outlet of the external-supplement reformate heat exchanger 4 and the bypass valve.
The improvement has the advantages that: according to the heat exchange temperature condition, the steam of the reforming oil steam heater 2 can be stopped, and the steam is saved. After the heat exchange temperature is increased, the fuel gas is saved by feeding the fuel gas into the reformate tower. After the heat of the outlet temperature of the tube side of the finished product tower heat exchanger 15 is taken away, the frequency conversion of the finished product tower top air cooler 16 can be reduced, and the power consumption is saved.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The foregoing list is only the preferred embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.
Claims (10)
1. The heat exchange system for the externally-replenished reformed oil of the aromatic hydrocarbon combination device is characterized in that: comprises an external complement reformed oil pipeline and a reformed oil heat exchange pipeline; an outlet of the external repair reformate pipeline is connected to a reformate heat exchange pipeline, the reformate heat exchange pipeline is sequentially connected with a reformate steam heater, a xylene deoxidizing tower and an external repair reformate heat exchanger, and an outlet of the reformate heat exchange pipeline is connected to a reformate tower; and the external-repair reformate heat exchanger is connected with an outlet pipeline of the finished product tower.
2. The aromatics complex external make-up oil heat exchange system of claim 1, wherein: the external repair reformate heat exchanger is connected to the outlet pipeline of the finished product tower through an external repair reformate heat exchanger inlet pipeline and an external repair reformate heat exchanger outlet pipeline, a heat exchange bypass valve is arranged on the outlet pipeline of the finished product tower, the external repair reformate heat exchanger inlet pipeline is connected to the front of the heat exchange bypass valve, the external repair reformate heat exchanger outlet pipeline is connected to the rear of the heat exchange bypass valve, an inlet valve is arranged on the external repair reformate heat exchanger inlet pipeline, and an outlet valve is arranged on the external repair reformate heat exchanger outlet pipeline.
3. The aromatics complex external make-up oil heat exchange system of claim 2, wherein: the reformate heat exchange pipeline is connected with the shell pass of the external-complement reformate heat exchanger, and the inlet pipeline of the external-complement reformate heat exchanger and the outlet pipeline of the external-complement reformate heat exchanger are connected with the tube pass of the external-complement reformate heat exchanger.
4. The aromatics complex external make-up oil heat exchange system of claim 2, wherein: the outlet pipeline of the finished product tower is connected to the outlet of the bottom of the finished product tower of the dimethylbenzene product, the outlet of the bottom of the finished product tower of the dimethylbenzene product is provided with an outlet valve, and the outlet pipeline of the finished product tower is sequentially connected with a finished product bottom pump, a finished product tower heat exchanger, a finished product tower top air cooler and a p-dimethylbenzene product aftercooler after the outlet valve, and the outlet of the outlet pipeline of the finished product tower is connected to a PX product inspection tank; and an adjusting valve group is arranged at the outlet of the outlet pipeline of the finished product tower, and the heat exchange bypass valve is arranged between the heat exchanger of the finished product tower and the air cooler at the top of the finished product tower.
5. The aromatics complex external make-up oil heat exchange system of claim 1, wherein: the outlet pipeline of the finished product tower is provided with an outlet branch pipe, and the outlet branch pipe is connected to the lateral line buffer tank of the raffinate tower and the adsorption feeding buffer tank.
6. The aromatics complex external make-up oil heat exchange system of claim 1, wherein: the reformate tower is provided with a reformate tower heat exchanger, an outlet of the reformate heat exchange pipeline is connected to the reformate tower heat exchanger, and the reformate tower is connected to the reformate tower after heat exchange by the reformate tower heat exchanger.
7. The aromatics complex external make-up oil heat exchange system of claim 1, wherein: the inlet of the reformate steam heater is provided with a regulating valve group, a reformate heat exchange pipeline is connected with an external reformate filter in the front of the regulating valve group, a filter bypass valve is arranged on the reformate heat exchange pipeline, the external reformate filter is connected with the reformate heat exchange pipeline through a filter inlet pipeline and a filter outlet pipeline, the filter inlet pipeline is connected with the front of the filter bypass valve, and the filter outlet pipeline is connected with the rear of the filter bypass valve.
8. The aromatics complex external make-up oil heat exchange system of claim 1, wherein: the xylene deoxidization tower is provided with a xylene deoxidization tower heat exchanger, and the reformate heat exchange pipeline is connected with the xylene deoxidization tower after heat exchange of the xylene deoxidization tower heat exchanger.
9. The aromatics complex external make-up oil heat exchange system of claim 8, wherein: the inlet of the xylene deoxidizing tower is connected with the tube side of the xylene deoxidizing tower heat exchanger, and the outlet of the xylene deoxidizing tower is connected with the shell side of the xylene deoxidizing tower heat exchanger.
10. The aromatics complex external make-up oil heat exchange system of claim 1, wherein: the reforming oil heat exchange pipeline is provided with a regulating valve group on the front road of the external repair reforming oil heat exchanger, the reforming oil heat exchange pipeline is provided with a crossing pipeline on the front road of the regulating valve group, the crossing pipeline is used for leading out the external repair reforming oil, and the crossing pipeline is provided with the regulating valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223453984.8U CN219252557U (en) | 2022-12-23 | 2022-12-23 | External-compensation reformate heat exchange system of aromatic hydrocarbon combined device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223453984.8U CN219252557U (en) | 2022-12-23 | 2022-12-23 | External-compensation reformate heat exchange system of aromatic hydrocarbon combined device |
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| CN219252557U true CN219252557U (en) | 2023-06-27 |
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| CN202223453984.8U Active CN219252557U (en) | 2022-12-23 | 2022-12-23 | External-compensation reformate heat exchange system of aromatic hydrocarbon combined device |
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