阅读说明：本技术 一种带肋片热管及带肋片热管式外取热器 (Heat pipe with fins and heat pipe type external heat collector with fins ) 是由 杨宏伟 于 2019-02-26 设计创作，主要内容包括：本发明公开了一种带肋片式热管和一种带肋片热管式外取热器,包括一个垂直设置的圆筒形壳体,其特征在于：所述圆筒形壳体的顶部设有汽水分离器,所述汽水分离器和取热器壳体通过盲法兰连接；在圆筒形壳体内垂直设置有带肋片热管式取热管。所述肋片为通长肋片,相邻两个肋片两端在基管的轴向上错开布置。采用本发明具有以下优点：解决了一个取热单元泄露影响外取热器运行、破坏相邻取热元件的问题；简化了取热系统；强化了传热,以显著降低的材料耗量取得相同的取热效果。大幅降低了工程投资。(The invention discloses a finned heat pipe and a finned heat pipe type external heat collector, which comprise a vertically arranged cylindrical shell, and are characterized in that: the top of the cylindrical shell is provided with a steam-water separator, and the steam-water separator is connected with the heat collector shell through a blind flange; a heat pipe type heat-taking pipe with fins is vertically arranged in the cylindrical shell. The fins are all long fins, and two ends of two adjacent fins are arranged in a staggered mode in the axial direction of the base pipe. The invention has the following advantages: the problems that the operation of an external heat collector is influenced and adjacent heat collecting elements are damaged due to the leakage of one heat collecting unit are solved; the heat taking system is simplified; the heat transfer is enhanced, and the same heat extraction effect is achieved with obviously reduced material consumption. Greatly reducing the engineering investment.)

1. The utility model provides a take fin heat pipe, by the heat pipe with locate on the heat pipe evaporation zone surface, with the surface looks vertically of heat pipe evaporation zone and vertically the fin that sets up constitute its characterized in that: the fin is logical long fin, and both ends are low fin, and height H is 18 ~ 24 millimeters, and the mid portion is high fin, and height H is 15 ~ 300 millimeters, and two adjacent fin both ends stagger in the axial of parent tube and arrange.

2. A finned heat pipe according to claim 1 wherein: the length M of the low fins is 300-400 mm.

3. A finned heat pipe according to claim 1 wherein: the staggered length b of the two ends of the two adjacent fins is 50-100 mm.

4. A finned heat pipe according to claim 1 wherein: the distance between two adjacent fins is 15-20 millimeters, and the thickness of fin is 5-30 millimeters.

5. A finned heat pipe according to claim 1 wherein: the cross section of the rib is rectangular, isosceles triangle or hyperbolic.

6. A finned heat pipe according to claim 5 wherein: when the cross section of the rib is rectangular, the length H of the rectangle is 15-300 mm, and the width W of the rectangle is 5-30 mm.

7. A finned heat pipe according to claim 5 wherein: when the cross section of the rib is an isosceles triangle, the size of the bottom side of the isosceles triangle is 5-30 mm, and the height of the bottom side is 15-300 mm.

8. A finned heat pipe according to claim 5 wherein: the fin cross section is the hyperbola type, the minimum thickness T of hyperbola fin is 5 ~ 30mm, and bottom thickness T is 30 ~ 100mm, highly is 20 ~ 300 mm.

9. The utility model provides a take fin heat pipe formula external heat collector, includes the cylinder casing of a perpendicular setting, its characterized in that: the top of the cylindrical shell is provided with a steam-water separator, and the steam-water separator is connected with the heat collector shell through a blind flange; a heat taking unit of the external heat collector is a heat taking pipe with fins, one end of the heat taking pipe with fins is an evaporation section with fins, and the evaporation section is inserted into a limiting hole of the guide bracket through a limiting pipe; the other end of the heat pipe with the fins is sequentially provided with a heat insulation section and a condensation section without fins, the heat insulation section is fixed on a blind flange of the vertical steam-water separator, the condensation section extends into the steam-water separator, the condensation section and the evaporation section of the heat pipe are positioned at two ends of the heat pipe, and the heat insulation section is positioned in the middle.

10. The finned heat pipe external heat collector of claim 9, wherein: the steam-water separator is positioned at the top end of the external heat collector and has a vertical structure; the steam-water separator is in a vertical cylinder shape, the upper part of the steam-water separator is provided with an end enclosure, the lower part of the steam-water separator is provided with a blind flange, the end enclosure, the cylinder and the blind flange form a closed cavity, and a steam-water separation element in the cavity consists of a steel wire mesh, a gap baffle and an underwater orifice plate.

11. The finned heat pipe external heat collector of claim 9, wherein: the clear distance between the heat pipe with the fins and the wall of the cylindrical shell is 30-500 mm; the distance between two adjacent heat pipe type heat pipes with fins is 30-500 mm.

12. The finned heat pipe external heat collector of claim 9, wherein: the heat pipe is got to take fin heat pipe the fin is logical long fin, and the fin both ends are low fin, and height H is 18 ~ 24 millimeters, and the mid portion is high fin, and height H is 15 ~ 300 millimeters, and two adjacent fin both ends stagger in the axial of parent tube and arrange.

13. The finned heat pipe external heat collector of claim 9, wherein: the length M of the low fins is 300-400 mm.

14. The finned heat pipe external heat collector of claim 9, wherein: the staggered length b of the two ends of the two adjacent fins is 50-100 mm.

15. The finned heat pipe external heat collector of claim 9, wherein: the distance between two adjacent fins is 15-20 millimeters, and the thickness of fin is 5-30 millimeters.

16. The finned heat pipe external heat collector of claim 9, wherein: the cross section of the rib is rectangular, isosceles triangle or hyperbolic.

17. The finned heat pipe external heat collector of claim 16, wherein: when the cross section of the rib is rectangular, the length H of the rectangle is 15-300 mm, and the width W of the rectangle is 5-30 mm.

18. The finned heat pipe external heat collector of claim 16, wherein: when the cross section of the rib is an isosceles triangle, the size of the bottom side of the isosceles triangle is 5-30 mm, and the height of the bottom side is 15-300 mm.

19. The finned heat pipe external heat collector of claim 16, wherein: the fin cross section is the hyperbola type, the minimum thickness T of hyperbola fin is 5 ~ 30mm, and bottom thickness T is 30 ~ 100mm, highly is 20 ~ 300 mm.

Technical Field

The invention belongs to the technical field of heat exchange, and particularly relates to a finned heat pipe type external heat collector.

Background

In a catalytic cracking unit in the petrochemical industry, a catalyst circulates between a reactor and a regenerator; the deactivated catalyst is burnt and regenerated in the regenerator, and the regenerated catalyst is circulated back to the reactor. Typically a heavy oil catalytic cracking unit. The coking reaction of the catalyst in the regenerator needs to release a large amount of heat, and when the heat exceeds the heat required by the catalytic reaction, an external heat exchanger is required to absorb the excessive heat, so that the smooth operation of the process is ensured. Meanwhile, the external heat collector also utilizes the surplus heat to generate steam, and an external heat-taking steam generation system becomes an important energy-saving measure in the catalytic cracking device. The external heat collector has wide industrial application due to large heat collection quantity and flexible and convenient operation.

The existing external heat exchangers have various types, but are all water tube type heat exchangers. Chinese patent ZL201220342676.5 discloses a finned tube external heat collector, which comprises a vertically arranged cylindrical shell, wherein a plurality of sleeve-type heat collecting tubes are vertically arranged in the shell. Each sleeve type heat taking pipe is of a closed structure and mainly comprises a water supply pipe and a steam-water mixture sleeve pipe arranged around the outer surface of the water supply pipe. Each sleeve type heat taking pipe is an independent heat transfer element and forms a heat transfer unit with an independent water-steam loop. Although the sleeve type heat extraction pipe and the external heat extractor adopting the sleeve type heat extraction pipe have the problems in the form of the sleeve type heat extraction pipe with one unit, the heat extraction unit can be cut off by closing the valves of the ascending pipe and the descending pipe of the heat extraction unit, and the leakage of high-pressure water cannot be avoided. There are major problems: high pressure water leaks are always a major concern for all parties. Because intraductal water pressure is higher than regeneration gas pressure, if one gets the heat pipe and reveals, at first can influence regenerator internal pressure, secondly if the processing time is longer slightly, the leakage point play water impact of a pipe gets adjacent hot unit to can lead to the pipeline to reveal on every side, secondly the ascending pipeline is numerous with descending pipeline quantity, arranges the difficulty, overhauls the difficulty, and the investment is great, increases operation danger and work load.

Disclosure of Invention

The invention aims to provide a heat pipe with fins and an external heat collector, which are used for solving various problems caused by leakage of a heat collecting unit of the external heat collector in the prior art, strengthening heat transfer, saving material consumption and reducing engineering investment; the operation workload is avoided.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a take fin formula heat pipe, by the heat pipe with locate on the heat pipe evaporation zone surface, with the surface looks vertically of heat pipe evaporation zone and the fin of vertical setting constitutes its characterized in that: the fins are full-length fins, namely the total length of each fin is basically the same as the length of the evaporation section of the heat pipe, the two ends of each fin are low fins, the height H is 18-24 mm, the middle part of each fin is a high fin, the height H is 15-300 mm, and the two ends of each two adjacent fins are arranged in the axial direction of the base pipe in a staggered mode.

The invention relates to a heat pipe with fins, which is further characterized in that: the length M of the low fins is 300-400 mm.

The invention relates to a heat pipe with fins, which is further characterized in that: the staggered length b of the two ends of the two adjacent fins is 50-100 mm.

The invention relates to a heat pipe with fins, which is further characterized in that: the distance between two adjacent fins (the distance between two welding seams welded on the heat pipe) is 15-20 mm, and the thickness of the fins is 5-30 mm.

The invention relates to a heat pipe with fins, which is further characterized in that: the cross section of the rib is rectangular, isosceles triangle or hyperbolic.

The invention relates to a heat pipe with fins, which is further characterized in that: when the cross section of the rib is rectangular, the length H of the rectangle is 15-300 mm, and the width W of the rectangle is 5-30 mm.

The invention relates to a heat pipe with fins, which is further characterized in that: when the cross section of the rib is an isosceles triangle, the size of the bottom side of the isosceles triangle is 5-30 mm, and the height of the bottom side is 15-300 mm.

The invention relates to a heat pipe with fins, which is further characterized in that: the fin cross section is the hyperbola type, the minimum thickness T of hyperbola fin is 5 ~ 30mm, and bottom thickness T is 30 ~ 100mm, highly is 20 ~ 300 mm.

The invention also provides an external heat collector adopting the heat pipe with the fins, which comprises the following specific steps:

the utility model provides a take fin heat pipe formula external heat collector, includes the cylinder casing of a perpendicular setting, its characterized in that: the top of the cylindrical shell is provided with a steam-water separator, and the steam-water separator is connected with the heat collector shell through a blind flange; a heat taking unit of the external heat collector is a heat taking pipe with fins, one end of the heat taking pipe with fins is an evaporation section with fins, and the evaporation section is inserted into a limiting hole of the guide bracket through a limiting pipe; the other end of the heat pipe with the fins is sequentially provided with a heat insulation section and a condensation section without fins, the heat insulation section is fixed on a blind flange of the vertical steam-water separator, the condensation section extends into the steam-water separator, the condensation section and the evaporation section of the heat pipe are positioned at two ends of the heat pipe, and the heat insulation section is positioned in the middle.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the steam-water separator is also called a steam pocket, is positioned at the top end of the external heat collector and has a vertical structure. The steam-water separator is characterized in that the steam-water separator is a vertical cylinder, the upper part of the steam-water separator is a sealing head, the lower part of the steam-water separator is a blind flange, the sealing head, the cylinder and the blind flange form a closed cavity, and steam-water separation elements in the cavity comprise steam-water separation elements such as a steel wire mesh (also called a foam breaking mesh), a gap baffle, an underwater pore plate and the like, so that the steam quality requirements of medium pressure and lower pressure levels of a boiler can be met, and if the operating pressure of the steam side is sub-high pressure or.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: at least one heat pipe type heat taking pipe with fins is vertically arranged in the cylindrical shell. The evaporation section end socket of the heat taking pipe is provided with a limiting pipe, and a guide support is arranged below the heat taking pipe. The ribbed end of each heat pipe with fins is inserted into the limiting hole of the guide bracket through the limiting pipe, is limited by the guide bracket and can freely stretch out and draw back. The heat insulation section and the condensation section are light pipe ends without fins, the heat insulation section is fixed on a blind flange of the vertical steam-water separator, and the condensation section extends into the steam-water separator. The ribbed segments of the ribbed heat pipe are located below such a cross section of the external heat collector: the cross section is a plane where the intersection point of the outer diameter of the catalyst inlet pipe and the lowest part of the outer diameter of the cylinder body of the outer heat collector is located in the use state of the outer heat collector.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the net distance between the heat pipe with the fins and the wall of the cylindrical shell (the top end of the fins closest to the wall) is 30-500 mm; the distance between two adjacent heat pipe type heat pipes with fins (the top ends of the two nearest fins) is 30-500 mm.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the heat pipe is got to take fin heat pipe the fin is logical long fin, and the fin both ends are low fin, and height H is 18 ~ 24 millimeters, and the mid portion is high fin, and height H is 15 ~ 300 millimeters, and two adjacent fin both ends stagger in the axial of parent tube and arrange.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the length M of the low fins is 300-400 mm.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the staggered length b of two ends of two adjacent fins in the fin tube is 50-100 mm.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the distance between two adjacent fins in the fin heat pipe (the distance between two welding seams welded on the heat pipe) is 15-20 mm, and the thickness of the fins is 5-30 mm.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the cross section of the rib is rectangular, isosceles triangle or hyperbolic.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: when the cross section of the rib is rectangular, the length of the rectangle is 15-300 mm, and the width of the rectangle is 5-30 mm.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: when the cross section of the rib is an isosceles triangle, the size of the bottom side of the isosceles triangle is 5-30 mm, and the height of the bottom side is 15-300 mmmm.

The invention relates to a heat pipe type external heat collector with fins, which is further characterized in that: the fin cross section is the hyperbola type, the minimum thickness T of hyperbola fin is 5 ~ 30mm, and bottom thickness T is 30 ~ 100mm, highly is 20 ~ 300 mm.

The invention relates to a heat pipe type external heat collector with fins, which mainly comprises a heat pipe type heat collector with fins, an external heat collecting shell and a vertical steam-water separator (steam drum). The device is used for taking out heat of a high-temperature catalyst, and is commonly used for a catalytic cracking unit regenerator in the petrochemical industry, an HCC (direct cracking of heavy oil to olefin) and an MTO (methanol to olefins) unit in the coal chemical industry and the like. The basic heat taking unit is a heat pipe, the heat pipe with fins is fixed on a blind flange of the vertical steam-water separator, a condensing end (end without fins) of the heat pipe is positioned in the vertical steam-water separator, an evaporating end (end with fins) is positioned on the catalyst side of the outer heat taking shell, and below the catalyst inlet pipe. One or more heat-taking heat pipes, an external heat-taking shell and the vertical steam-water separator form the heat-pipe external heat collector with the fins.

The invention adopts the heat pipe as the heat taking unit, the heat taken by the heat pipe is directly transmitted to the saturated water in the vertical steam-water separator, a large number of ascending pipes and descending pipes and large-caliber high-medium pressure valves of the traditional sleeve-type external heat collector are saved, and the frame of the external heat collector is reduced by about 10 meters, thereby greatly reducing the investment; and meanwhile, even if one heat pipe leaks, because the water vapor and the catalyst side are mutually isolated, the regenerator and the adjacent heat pipe are not affected, manual intervention is not needed, the operation of the whole external heat collector is not affected, and only the failed heat pipe needs to be replaced during maintenance.

The finned heat pipe type heat collector is mainly used for regenerators of catalytic cracking units in petrochemical industry and regenerators of other catalytic cracking units similar to the technical process, such as MTO (methanol to olefin) units and HCC (direct cracking of heavy oil to olefin) units; but also can be applied to other powdery high-temperature material heat transfer places with similar requirements.

Compared with the prior art, the finned heat pipe external heat collector has the following beneficial effects:

compared with the prior art, the invention has the following advantages:

1. the problems that the operation of an external heat collector is influenced and adjacent heat collecting elements are damaged due to the leakage of one heat collecting unit are solved, and no operation workload is generated;

2. the heat extraction system is simplified, the numerous ascending pipes and descending pipes of the sleeve-type external heat extractor and the large-caliber high-pressure valves on the pipelines are removed, and the external heat extraction frame is reduced by about 10 meters; the heat transfer is enhanced, and the same heat extraction effect is achieved with obviously reduced material consumption.

3. Greatly reducing the engineering investment.

The present invention will be described in further detail with reference to the following drawings and detailed description, but the present invention is not limited to the scope of the present invention.

Drawings

FIG. 1 is a schematic diagram of a fin structure of a heat pipe with fins according to the present invention;

FIG. 2 is an enlarged schematic view of a fin with a heat pipe according to the present invention;

FIG. 3 is a schematic view of a cross-section rectangle of a heat pipe A-A with fins according to the present invention;

FIG. 4 is a schematic cross-sectional triangular view of a heat pipe with fins A-A according to the present invention;

FIG. 5 is a schematic view of a heat pipe with fins of the present invention with a hyperbolic cross section A-A;

FIG. 6 is a schematic view of a heat pipe with fins according to the present invention;

FIG. 7 is a schematic structural view of a heat pipe type external heat exchanger with fins according to the present invention;

FIG. 8 is a schematic cross-sectional view taken along line A-A of FIG. 7 according to the present invention.

Wherein the reference symbols shown are: 1-finned heat pipe, 11-fins, 111-low fins, 112-high fins, 121-condensation section, 131-insulation section, 141-evaporation section, 15-

A limiting pipe, 201-a vertical steam-water separator, 202-an outer heat collector shell, 203-a blind flange,

3-degassing port, 4-catalyst inlet, 5-catalyst outlet, 6-guide support and 7-fluidized air distributor.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

referring to fig. 1 and 2, the finned heat pipe of the present invention is composed of a base pipe 1 and fins 11 having a rectangular, triangular or hyperbolic cross section, which are provided on an outer surface of the base pipe, are vertically arranged with respect to the outer surface of the base pipe, and are longitudinally arranged, and fig. 3, 4 and 5 are schematic cross-sectional views of the fins having a rectangular, triangular or hyperbolic cross section, respectively. Fins 11 are welded to the outer surface of the base pipe 1. The fins 11 are arranged longitudinally, that is, the length direction is arranged along the axial line of the base pipe 1. The fins 11 are full-length fins, namely the total length of each fin is basically the same as the length of a fin tube, the two ends of each fin are low fins 111, the height H is 18-24 mm, the length M is 300-400 mm, the middle part of each fin is a high fin 112, the height H is 15-300 mm, the two ends of each two adjacent fins are arranged in a staggered mode in the axial direction of the base tube, the staggered length b is 50-100 mm, and the thickness of each fin is 5-30 mm.

The number of the fins 11 and the total length of the fins 11 on the finned tube of the present invention are determined by calculation according to the heat transfer requirement. The ribbed tube is made using conventional materials and methods.

FIG. 6 shows a heat pipe with fins according to the present invention. The whole finned heat pipe is divided into a condensation section 121 of the light pipe, an insulation section 131 of the light pipe and an evaporation section 141 with fins, wherein the condensation section 121 is positioned in a steam-water separator (steam drum) 201 and transfers the heat of working media in the heat pipe to water in the steam-water separator (steam drum) 201; the heat insulation section is fixed on the blind flange 203 and is used for positioning the heat pipe; the evaporation section 141 absorbs heat of the medium outside the heat pipe.

Fig. 7 and 8 show a heat pipe type external heat exchanger with fins (simply referred to as external heat exchanger) according to the present invention. It comprises a vertically arranged cylindrical shell 202, and a steam-water separator (steam drum) 201 is arranged at the top of the shell 202. A plurality of heat pipe type heat pipes 1 with fins are vertically arranged in the shell 202, and a guide bracket 6 is arranged below the heat pipe type heat pipes 1 with fins. The finned heat pipe type heat pipe 1 is of the type shown in fig. 6. At least one heat pipe 1 with fins is arranged on the external heat collector. The heat insulation section 131 of each heat pipe 1 with fins is fixed on the blind flange 203, and the other end of the heat pipe inserts the limiting pipe 15 into the limiting hole of the guide support 6, is limited by the guide support 6 and can freely stretch out and draw back. The shell 202 is provided with a catalyst inlet 4, a catalyst outlet 5 and a degassing port 3, and a fluidized air distributor 7 is arranged at the lower part in the shell 202 and below the guide bracket 6. The inner wall of the shell 202 is lined with a heat-insulating and wear-resistant lining. As shown in fig. 7, the evaporation section of each finned heat pipe type heat pipe 1 is located below such a cross section of the external heat collector: the cross section is a plane where the intersection point of the outer diameter of the catalyst inlet pipe and the lowest part of the outer diameter of the cylinder body of the outer heat collector is located in the use state of the outer heat collector. Above this plane is a light pipe section. The clear distance S1 (the top end of the rib closest to the wall) between the heat pipe with the rib and the wall of the shell 202 is 30-500 mm; the distance (the top ends of two adjacent fins) S2 between two adjacent heat pipe type heat pipes with fins is 30-500 mm.

The finned heat pipe type external heat collector (202) and the steam-water separator (steam drum) (201) are integrally arranged and connected through a blind flange 203, and the steam-water separator (steam drum) (201) is located at the top end of the external heat collector and is of a vertical structure. The steam-water separation element in the steam-water separator (steam drum) 201 consists of a gap baffle, an underwater pore plate and a steel wire mesh (also called a foam breaking mesh), can meet the steam quality requirements of medium pressure and lower pressure levels of a boiler, and can be added with a corresponding external steam-water separation element if the steam side operating pressure is sub-high pressure or higher.

The operation of the external heat exchanger shown in FIG. 7 as an external heat exchanger of a catalytic cracking unit is as follows: the high temperature catalyst from the regenerator of the catalytic cracking unit enters the external heat remover through the catalyst inlet pipe 4, and forms a section of dense phase catalyst bed in the external heat remover. The fluidized air enters the catalyst bed layer through the fluidized air distributor 7, so that the catalyst is in a fluidized state, and the heat release effect of the high-temperature catalyst on the heat pipe type fin heat taking pipe 1 is enhanced. The exothermically cooled catalyst is discharged into a regenerator of the catalytic cracking unit through a catalyst outlet pipe 5, so that the cooling circulation process of the catalyst in an external heat remover is completed. The flue gas entrained in the fluidized catalyst is discharged back to the regenerator through degassing port 3. Each heat pipe takes heat to transfer the heat of the catalyst to the water in the steam drum. The surplus heat brought by the high-temperature catalyst from the regenerator of the catalytic cracking unit is continuously taken away through the heat pipe type heat taking pipe 1. The external heat collector shown in the attached figure 7 mainly adopts various finned heat pipe type heat pipes 1 shown in the attached figure 6, and the finned pipe sections of the finned heat pipe type heat pipes 1 adopt the finned heat pipes. The rest of the structure of the external heat collector shown in FIG. 7 and the heat-removing operation process thereof for the catalytic cracking unit are basically the same as those of the external heat collector of the prior sleeve-type fin heat-removing pipe.

The invention has been described in detail with reference to the drawings and the detailed description. In fig. 1 to 8 of the present invention, like reference numerals denote like features.

The external heat collector is mainly used for catalytic cracking units in the petroleum processing industry and other catalytic cracking units similar to the technical process of the external heat collector, such as MTO (methanol to olefin) units and HCC (direct cracking of heavy oil to olefin) units; but also to other heat transfer locations with similar requirements. The finned heat pipe of the present invention may be used as a stand-alone heat transfer element, for example in a heat exchanger operating similarly to the external heat exchanger of the present invention. The ribbed heat pipe may be used in outer heat collector or inner heat collector of the catalytic cracking unit or in tubular boiler in similar operation.