CN213421917U - Novel rapid cooling heat exchanger - Google Patents
Novel rapid cooling heat exchanger Download PDFInfo
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- CN213421917U CN213421917U CN202021490989.6U CN202021490989U CN213421917U CN 213421917 U CN213421917 U CN 213421917U CN 202021490989 U CN202021490989 U CN 202021490989U CN 213421917 U CN213421917 U CN 213421917U
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Abstract
The utility model provides a novel rapid cooling heat exchanger, include: the device comprises an inlet connecting piece, a lower water vapor header, a shell, an upper water vapor header, an inner pipe and a pyrolysis gas header; the inlet connecting piece is connected with the lower steam header, the lower steam header is connected with the shell, the shell is connected with the upper steam header, one end of the inner pipe penetrates through the lower steam header, the shell and the upper steam header, the other end of the inner pipe is connected with the pyrolysis gas header, the shell is of a box body structure with two uncovered ends and is arranged between the lower steam header and the upper steam header, a steam inlet is formed in the lower steam header, a steam outlet is formed in the upper steam header, a high-temperature medium enters the inner pipe through the inlet connecting piece, a low-temperature medium enters the lower steam header 2 through the steam inlet, the high-temperature medium moves towards the upper steam header through a gap between the inner pipe and the shell 3 and is discharged from the steam outlet, and the high-temperature medium after heat exchange flows into the pyrolysis gas header through the inner pipe and flows out of the pyrolysis gas header to finish heat exchange.
Description
Technical Field
The utility model relates to a rapid cooling heat transfer field, concretely relates to novel rapid cooling heat exchanger.
Background
Cracking furnaces are key pieces of equipment for ethylene plants. Cracking raw materials are subjected to high-temperature cracking in a furnace tube of a cracking furnace and then enter a quenching heat exchanger for rapid cooling. At present, the quenching heat exchanger for the cracking furnace is mostly a linear quenching heat exchanger.
The traditional linear quenching heat exchanger consists of a water vapor feeding header, a water vapor feeding header connecting piece, a water vapor feeding header connecting pipe, a water vapor discharging header connecting piece, a water vapor discharging header connecting pipe, a cracking gas header, an inlet connecting piece, an outer pipe, an inner pipe and the like; the inner pipe is concentrically arranged in the outer pipe in a penetrating way, the medium of the inner pipe is cracked gas at about 800 ℃, and the medium of the outer pipe is water-vapor mixture (saturated steam) at about 350 ℃. Each inner pipe is connected with an outlet furnace tube of the cracking furnace through an inlet connecting piece, and each outer pipe is connected with the upper header and the lower header through the upper header connecting piece, the lower header connecting pipe and the upper header connecting pipe.
The operation condition of the rapid cooling heat exchanger is harsh, the rapid cooling heat exchanger is in a high-temperature difference and high-pressure difference environment, and the heat exchange tube bears axial deformation pressure; the linear quenching heat exchanger of traditional design is complicated in structure, and upper and lower connecting piece can't absorb thermal expansion, and the inner tube needs to reduce thermal expansion difference through pretensioning, and the manufacturing degree of difficulty is great.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a novel rapid cooling heat exchanger. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to the embodiment of the utility model, a novel rapid cooling heat exchanger is provided, include: the device comprises an inlet connecting piece, a lower water vapor header, a shell, an upper water vapor header, an inner pipe and a pyrolysis gas header; the inlet connecting piece is connected with the lower steam header, the lower steam header is connected with the shell, the shell is connected with the upper steam header, one end of the inner tube is connected with the inlet connecting piece, the inner tube penetrates through the lower steam header, the shell and the upper steam header, the other end of the inner tube is connected with the cracking gas header, the shell is a box body structure with two uncovered ends and is arranged between the lower steam header and the upper steam header, a steam inlet is arranged on the lower steam header, a steam outlet is arranged on the upper steam header, high-temperature media enter the inner tube through the inlet connecting piece, low-temperature media enter the lower steam header through the steam inlet, move to the upper steam header through a gap between the inner tube and the shell and are discharged from the steam outlet, and the high-temperature media after heat exchange flow into the cracking gas header through the inner tube and flow out of the cracking gas header, and finishing heat exchange.
Preferably, the inlet connector comprises an outer pipe and a central pipe, the central pipe is connected with the inner pipe, and the outer pipe is connected with the lower steam header.
Preferably, a bottom groove is formed between the outer side pipe and the central pipe, and a heat-resistant block is arranged in the bottom groove.
Preferably, the steam inlet is arranged at the top of the lower steam header, and the steam outlet is arranged at the top of the upper steam header.
Preferably, a sewage draining outlet is formed in the bottom of the upper water vapor header.
Preferably, a coke cleaning interface is uniformly arranged at one end of the pyrolysis gas header in the longitudinal direction.
Preferably, the inner pipes are arranged in a plurality of groups and are longitudinally and uniformly arranged in the shell in parallel, and the cross sections of the upper steam header and the lower steam header are long circular hole types.
Preferably, the sewage draining exit is a sewage draining exit protruding downwards.
Preferably, one uncovered end of the shell is fixedly connected with the lower steam header through welding.
Preferably, one side of the upper steam header, which is far away from the shell, is fixedly connected with the outer side of the inner pipe through welding.
The embodiment of the utility model provides a technical scheme can include following beneficial effect:
according to the above embodiment, the utility model provides a novel rapid cooling heat exchanger, the utility model discloses optimize the integration to the outer tube that sets up with traditional concentric row for the casing, very big reduction manufacturing cost, increased the volume ratio of low temperature medium and high temperature medium simultaneously, improved heat exchange efficiency. The utility model discloses cancelled traditional design outer tube and upper and lower steam header connecting piece, takeover between, simple structure, good reliability, low in manufacturing cost, the thermal energy error between steam header can automatic compensation casing and the inner tube about simultaneously avoids thermal stress to produce destruction, protective apparatus, the life of extension equipment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the associated components of the header tank of an embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of the associated components of the header of the drain tank of the embodiment of the present invention;
in the figure: 1-an inlet connection; 2-a steam header; 3-a shell; 4-feeding water vapor header; 5-inner tube; 6-cracking gas header; 7-a coke cleaning interface; 8-a water vapor inlet; 9-a sewage draining outlet; 10-vapor outlet.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
The following detailed description of the present invention is made with reference to the following examples:
the utility model discloses a provide a novel rapid cooling heat exchanger, as shown in fig. 1-3, include: the device comprises an inlet connecting piece 1, a lower water vapor header 2, a shell 3, an upper water vapor header 4, an inner pipe 5 and a pyrolysis gas header 6; the inlet connecting piece 1 is connected with a lower steam header 2, the lower steam header 2 is connected with a shell 3, the shell 3 is connected with an upper steam header 4, one end of the inner tube 5 is connected with the inlet connecting piece 1, the inner tube penetrates through the lower steam header 2, the shell 3 and the upper steam header 4, the other end of the inner tube is connected with a pyrolysis gas header 6, the shell 3 is of a box structure with two uncovered ends and is arranged between the lower steam header 2 and the upper steam header 4, a steam inlet 8 is arranged on the lower steam header 2, a steam outlet 10 is arranged on the upper steam header 4, a high-temperature medium enters the inner tube 5 through the inlet connecting piece 1, a low-temperature medium enters the lower steam header 2 through the steam inlet 8, moves to the upper steam header 4 through a gap between the inner tube 5 and the shell 3 and is discharged from the steam outlet 10, the high-temperature medium after heat exchange flows into the pyrolysis gas header 6 through the inner pipe 5 and flows out of the pyrolysis gas header 6 to finish heat exchange.
In the concrete embodiment, as shown in fig. 2, 2 tops of offal steam header are provided with steam inlet 8, as shown in fig. 3 go up 4 bottoms of steam header and be provided with drain 9, when the device parks and overhauls, intake from steam inlet 8, decoking the clearance between casing 3 and inner tube 5, get rid of impurity, sewage is discharged from drain 9, as shown in fig. 3, drain 9 is bellied drain downwards, is favorable to the blowdown to flow.
Further, 2 one sides of offal vapour header vertically evenly are provided with a plurality of entry connecting pieces 1, and entry connecting piece 1 includes outside pipe and center tube, and the center tube is connected with inner tube 5, and the outside pipe is connected with offal vapour header 2, is provided with the kerve between outside pipe and the center tube, is provided with heat-resisting piece in the kerve, through setting up heat-resisting piece, can effectually prevent that entry connecting piece 1 from warping, prolongs the life of entry connecting piece 1, reduces into manufacturing cost.
According to the above scheme, further, as shown in fig. 1, the other side of the lower steam header 2 is longitudinally provided with a heat exchange box, the heat exchange box assembly comprises an inner pipe 5 and a shell 3, the inner pipe 5 is longitudinally and uniformly distributed inside the shell 3, a gap is formed between the inner pipe 5 and the shell 3, a low-temperature medium is convenient to enter, and the inner pipe 5 separates the high-temperature medium from the low-temperature medium, so that heat exchange is convenient.
The inner pipe 5 is connected with the inlet connecting piece 1, one end of the shell 3 is fixedly connected with the lower steam header 2 through welding, and as shown in figures 1-3, the cross sections of the upper steam header and the lower steam header are of long circular hole type.
Specifically, 3 other ends of casing are fixed with last steam header 4, and inner tube 5 passes last steam header 4 and sets up, and 4 tops of going up steam header are provided with steam outlet 10, and it is fixed with the inner tube 5 outside through the welding to go up steam header 4 and keep away from 3 one side of casing.
Further, the other end of the inner pipe 5 is provided with a pyrolysis gas header 6, and the other end of the pyrolysis gas header 6 is longitudinally and uniformly provided with a plurality of coke cleaning interfaces 7.
According to the above embodiment, in the specific implementation, the high temperature medium enters the inner pipe 5 through the inlet connector 1, wherein the temperature of the high temperature medium is set to 750-900 ℃; a low-temperature medium enters the lower water vapor header 2 through the water vapor inlet 8, wherein the temperature of the low-temperature medium is set to be 250-300 ℃, the low-temperature medium passes through a gap between the inner pipe 5 and the shell 3 in the heat exchange pipe unit, moves to the upper water vapor header 4 and is discharged from the water vapor outlet 10, and the flow rate of the low-temperature medium is far greater than that of a high-temperature medium; the high-temperature medium and the low-temperature medium exchange heat through the inner pipe 5, and after heat exchange, the temperature of the high-temperature medium is 350-450 ℃, and the temperature of the low-temperature medium is 300-350 ℃; the high-temperature medium after heat exchange flows into the pyrolysis gas header 6 through the inner pipe 5 and flows out of the pyrolysis gas header 6 to finish heat exchange; after long-time use, the device needs to be stopped for maintenance, the inner pipe is cleaned by connecting the coke cleaning water pipe through the coke cleaning interface 7, impurities or dirt in the inner pipe are removed, water enters from the water vapor outlet 10, a gap between the shell 3 and the inner pipe 5 is cleaned, the impurities are removed, sewage is discharged from the sewage discharge outlet 9, the device is protected, the service life of the device can be effectively prolonged, and the production cost is reduced; the efficiency of quenching and heat exchange can be effectively improved.
The utility model discloses an useful part lies in: the utility model discloses optimize the integration to casing 3 with the concentric outer tube that sets up of tradition, very big reduction manufacturing cost, increased the volume ratio of low temperature medium and high temperature medium simultaneously, improved heat exchange efficiency.
The utility model discloses cancelled traditional design outer tube and upper and lower steam header 2 within a definite time connecting piece, takeover, simple structure, good reliability, low in manufacturing cost, the thermal energy error between automatic compensation casing 3 and the inner tube 5 can be well to steam header 2 about simultaneously, avoids thermal stress to produce destruction, protective apparatus, the life of extension equipment.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but also to cover any modifications or equivalent changes made in the technical spirit of the present invention, which fall within the scope of the present invention.
Claims (10)
1. A novel quenching heat exchanger is characterized by comprising: the device comprises an inlet connecting piece, a lower water vapor header, a shell, an upper water vapor header, an inner pipe and a pyrolysis gas header; the inlet connecting piece is connected with the lower steam header, the lower steam header is connected with the shell, the shell is connected with the upper steam header, one end of the inner tube is connected with the inlet connecting piece, the inner tube penetrates through the lower steam header, the shell and the upper steam header, the other end of the inner tube is connected with the cracking gas header, the shell is a box body structure with two uncovered ends and is arranged between the lower steam header and the upper steam header, a steam inlet is arranged on the lower steam header, a steam outlet is arranged on the upper steam header, high-temperature media enter the inner tube through the inlet connecting piece, low-temperature media enter the lower steam header through the steam inlet, move to the upper steam header through a gap between the inner tube and the shell and are discharged from the steam outlet, and the high-temperature media after heat exchange flow into the cracking gas header through the inner tube and flow out of the cracking gas header, and finishing heat exchange.
2. The novel quench heat exchanger of claim 1 wherein the inlet connection comprises an outer tube and a center tube, the center tube being connected to the inner tube, the outer tube being connected to a lower steam header.
3. The novel quench heat exchanger of claim 2 wherein a bottom groove is provided between the outer tube and the center tube, and a heat resistant block is provided in the bottom groove.
4. The novel quench heat exchanger of any of claims 1-3 wherein the steam inlet is disposed at the top of the lower steam header and the steam outlet is disposed at the top of the upper steam header.
5. The novel quench heat exchanger as claimed in any of claims 1-3, characterized in that the bottom of the upgas header is provided with a drain.
6. The novel quenching heat exchanger as claimed in any one of claims 1-3, wherein one end of the pyrolysis gas header is longitudinally and uniformly provided with a decoking interface.
7. The novel quenching heat exchanger as claimed in any one of claims 1-3, wherein the inner tubes are in multiple groups and are arranged in parallel longitudinally and uniformly in the shell, and the cross sections of the upper steam header and the lower steam header are in the shape of long round holes.
8. The novel quench heat exchanger of claim 5 wherein the drain is a downwardly convex drain.
9. The novel quench heat exchanger of any of claims 1-3 wherein the uncovered end of the shell is fixedly connected to the lower steam header by welding.
10. The novel quench heat exchanger of claim 9 wherein the side of the moisture header remote from the shell is fixedly attached to the outside of the inner tube by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021490989.6U CN213421917U (en) | 2020-07-26 | 2020-07-26 | Novel rapid cooling heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021490989.6U CN213421917U (en) | 2020-07-26 | 2020-07-26 | Novel rapid cooling heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213421917U true CN213421917U (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021490989.6U Active CN213421917U (en) | 2020-07-26 | 2020-07-26 | Novel rapid cooling heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213421917U (en) |
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2020
- 2020-07-26 CN CN202021490989.6U patent/CN213421917U/en active Active
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