CN109331748B - Manufacturing method of tube bundle type external heat collector device - Google Patents
Manufacturing method of tube bundle type external heat collector device Download PDFInfo
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- CN109331748B CN109331748B CN201811346420.XA CN201811346420A CN109331748B CN 109331748 B CN109331748 B CN 109331748B CN 201811346420 A CN201811346420 A CN 201811346420A CN 109331748 B CN109331748 B CN 109331748B
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- collecting tube
- pipe
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000605 extraction Methods 0.000 claims description 31
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 9
- 230000007547 defect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A manufacturing approach of tube bundle type external heat collector device, evenly distribute the heat-collecting tube in the body, set up the tie rod between the end of the said heat-collecting tube, set up the downcomer in the heat-collecting tube, the downcomer couples to heat-collecting tube as an organic whole through the support, the peripheral lower end of the downcomer sets up the annular choke collar, evenly distribute the drain hole on the choke collar, one side of upper end of the heat-collecting tube sets up the water outlet, the lower part periphery of the heat-collecting tube evenly distributes the little heat-collecting tube, two adjacent small heat-collecting tube's both ends are not in the same level, the both ends of the little heat-collecting tube communicate with heat-collecting tube; compared with the existing sheet heat collector, the sheet heat collector has the advantages of high heat collecting capacity, high deformation resistance, stable steam-water circulation, reliable safety performance, simpler and more convenient equipment manufacture, easier guarantee of processing quality, long service life and capability of realizing long-period safe and stable operation.
Description
Technical Field
The invention relates to the field of external heat extractors, in particular to a manufacturing method of a tube bundle type external heat extractor device.
Background
At present, the flow direction of the catalyst in the external heat collector can be divided into two forms: a down-flow dense-phase heat transfer external heat collector and an up-flow dilute-phase heat transfer external heat collector. Because of the characteristics of high heat transfer coefficient of high-temperature catalyst particles, large heat-taking load and operation elastic range, low energy consumption and the like in a fluidization state, the catalyst is widely used in a heavy oil catalytic cracking device and becomes an indispensable key device.
The heat-collecting device is characterized in that a certain number of independent heat-collecting units are arranged in the outer heat collector, a thermal catalyst flows outside a tube, the enthalpy-deficient water is introduced to the inner bottom of the heat-collecting tube from top to bottom through a descending tube arranged in the heat-collecting tube, then flows from bottom to top through an annular gap between the heat-collecting tube and the descending tube, and saturated water and saturated steam are generated after heat exchange and flow out of the heat-collecting tube.
In order to enhance heat transfer, a plurality of longitudinal fins are arranged on all the heat-collecting pipes along the circumferential direction, the lengths of the fins are different from 5 meters to 8 meters, automatic welding is difficult to perform due to the dense arrangement of the fins, the welding seam is too long and too dense, the pipes deform along the axial direction of the heat-collecting pipes due to heating in the welding process, and flaw detection is difficult, so that a large number of welding stress and defects are generated on the heat-collecting pipes, the manufacturing quality of the heat-collecting pipes is greatly influenced, and hidden hazards are buried for the safe operation of an external heat collector.
The external heat collector is vertically arranged, the high-temperature catalyst flows in from the upper part of the external heat collector, flows out from the bottom after heat exchange of the heat collecting pipe, and the fins and the heat collecting pipe are subjected to thermal expansion in two directions due to longitudinal temperature difference and radial temperature difference, so that the heat collecting pipe is distorted and deformed, the normal water circulation of the heat collecting system is deteriorated, the heat collecting pipe is finally burst, the service life of equipment is greatly prolonged, and the production cost is increased; how to make the outer heat collector run safely and reliably for a long period, and at the same time, the heat collecting capacity of the outer heat collector can be improved, which is a technical problem which is difficult to solve for a long time.
For the above reasons, a method for manufacturing a tube bundle type external heat collector device has been developed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a manufacturing method of a tube bundle type external heat collector device.
In order to achieve the above purpose, the invention adopts the following technical scheme: a manufacturing approach of the external heater device of a tube bundle, a said external heater device of tube bundle, by: the device comprises a shell, a heat-collecting pipe, a small heat-collecting pipe, a connecting rod, a descending pipe, a throttle ring and a bracket; the heat-collecting pipes are uniformly distributed in the shell, connecting rods are arranged between the tail ends of the heat-collecting pipes, the upper ends of the heat-collecting pipes are exposed out of the shell, descending pipes are arranged in the heat-collecting pipes and are connected with the heat-collecting pipes into a whole through a support, the tail ends of the descending pipes are positioned at the lower ends of the heat-collecting pipes, annular throttling rings are arranged at the lower ends of the periphery of the descending pipes, drain holes are uniformly distributed on the throttling rings, a drain outlet is formed in one side of the upper end of each heat-collecting pipe, small heat-collecting pipes are uniformly distributed at the periphery of the lower part of each heat-collecting pipe, two adjacent small heat-collecting pipes are staggered in the height direction of each heat-collecting pipe, the two ends of each small heat-collecting pipe are communicated with each heat-collecting pipe, and the heat-collecting pipes, the descending pipes and the throttling rings are concentric circles;
a manufacturing method of a tube bundle type external heat collector device comprises the following steps: the lower extreme periphery welding throttle circle of downcomer, evenly distributed wash port on the throttle circle, the upper end one side of heat-collecting tube sets up the outlet, insert the downcomer that has the throttle circle in the heat-collecting tube, weld the support between the inner wall of downcomer periphery and heat-collecting tube, the lower part periphery evenly distributed little heat-collecting tube of heat-collecting tube, the both ends welding of little heat-collecting tube is in the periphery of heat-collecting tube, the both ends and the heat-collecting tube that communicate with each other of little heat-collecting tube, the heat-collecting tube, little heat-collecting tube, the downcomer, the throttle circle and support constitute single heat-collecting mechanism, the lower extreme of the heat-collecting tube of a plurality of single heat-collecting mechanisms passes through the connecting rod and links as an organic wholely constitutes tube bundle heat-collecting mechanism, install tube bundle heat-collecting mechanism in the casing, set up various import, export according to actual conditions on the casing.
The minimum distance between the periphery of the throttling ring and the inner wall of the heat-collecting pipe is 2mm.
The small heat-taking pipe is formed by symmetrically arranging transverse pipes at two ends of the vertical pipe, the joint of the vertical pipe and the transverse pipes is arc-shaped, the ports of the transverse pipes are communicated with the heat-taking pipe, and a gap is reserved between the vertical pipe and the outer wall of the heat-taking pipe.
The specification of the heat-collecting pipe is as follows: DN 50-phi 60mm tube.
The beneficial effects of the invention are as follows: catalyst flow and air flow patterns: the catalyst passes through the dense bed of the external heat collector from top to bottom, the flowing air passes through the dense zone and the dilute zone of the bubbling bed from bottom to top at an apparent airspeed of 0.3-05 m/s, the gas with a small amount of catalyst is returned to the dilute zone of the regenerator from the balance tube at the upper part of the external heat collector, and the circulation quantity of the catalyst is controlled through the slide valve on the outlet pipeline, so that the change of the heat collecting load of the external heat collector is realized; the structural form of the steam and water circulation loop and the heat taking pipe is as follows: each heat-collecting pipe is taken as an independent unit, water flows from top to bottom to the inner bottom of the heat-collecting pipe from top to bottom through an annular gap between the heat-collecting pipe and the lower pipe, meanwhile, part of the water at the bottom of the heat-collecting pipe flows into the small heat-collecting pipe, and the diameter and the number of drain holes are arranged on a throttling ring at the lower end of the lower pipe after calculation according to the pressure drop between the heat-collecting pipe and the small heat-collecting pipe, so that the water flow rates of the heat-collecting pipe and the small heat-collecting pipe are consistent, and pipe explosion is avoided; the gasification rate of the heat-collecting pipe is the same as that of the small heat-collecting pipe, the wall temperature difference between the heat-collecting pipe and the small heat-collecting pipe is not more than 10 degrees, the temperature stress is reduced, and the safety of the heat-collecting pipe is ensured; the shell reduces or increases various inlets and outlets according to actual application conditions; compared with the existing sheet heat collector, the sheet heat collector has the advantages of high heat collecting capacity, high deformation resistance, stable steam-water circulation, reliable safety performance, simpler and more convenient equipment manufacture, easier guarantee of processing quality, long service life and capability of realizing long-period safe and stable operation.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a general assembly structure;
FIG. 2 is a schematic cross-sectional view of a heat extraction tube;
in fig. 1 and 2: the heat-collecting device comprises a shell 1, a heat-collecting tube 2, a small heat-collecting tube 3, a connecting rod 4, a descending tube 5, a throttling ring 6 and a bracket 7.
Detailed Description
The invention is further described in detail below with reference to examples and embodiments:
example 1
The heat-collecting tube 2 is uniformly distributed in the shell 1, a connecting rod 4 is arranged between the tail ends of the heat-collecting tube 2, the upper end of the heat-collecting tube 2 is exposed out of the shell 1, a descending tube 5 is arranged in the heat-collecting tube 2, the descending tube 5 is connected with the heat-collecting tube 2 into a whole through a bracket 7, the tail end of the descending tube 5 is positioned at the lower end of the heat-collecting tube 2, a circular throttling ring 6 is arranged at the lower end of the periphery of the descending tube 5, drain holes are uniformly distributed on the throttling ring 6, a drain outlet is arranged at one side of the upper end of the heat-collecting tube 2, small heat-collecting tubes 3 are uniformly distributed at the periphery of the lower part of the heat-collecting tube 2, two adjacent small heat-collecting tubes 3 are staggered in the height direction of the heat-collecting tube 2, and two ends of the small heat-collecting tube 3 are communicated with the heat-collecting tube 2, and the heat-collecting tube 2, the descending tube 5 and the throttling ring 6 are concentric circles;
a manufacturing method of a tube bundle type external heat collector device comprises the following steps: the lower extreme periphery of drop tube 5 welds throttle 6, evenly distributed wash port on the throttle 6, upper end one side of heat extraction tube 2 sets up the outlet, insert the drop tube 5 that has throttle 6 in the heat extraction tube 2, weld support 7 between the inner wall of drop tube 5 periphery and heat extraction tube 2, the lower part periphery evenly distributed little heat extraction tube 3 of heat extraction tube 2, the both ends welding of little heat extraction tube 3 are in the periphery of heat extraction tube 2, the both ends and the heat extraction tube 2 of little heat extraction tube 3 communicate with each other, heat extraction tube 2, little heat extraction tube 3, drop tube 5, throttle 6 and support 7 constitute single heat extraction mechanism, the lower extreme of a plurality of single heat extraction tube 2 links into an organic whole through connecting rod 4 and constitutes tube bank type heat extraction mechanism, install tube type heat extraction mechanism in casing 1, set up various import, export according to actual conditions on the casing 1.
Example 2
The minimum distance between the periphery of the throttling ring 6 and the inner wall of the heat-collecting pipe 2 is 2mm.
Example 3
The small heat-taking pipe 3 is formed by symmetrically arranging transverse pipes at two ends of a vertical pipe, the joint of the vertical pipe and the transverse pipes is arc-shaped, the port of the transverse pipe is communicated with the heat-taking pipe 2, and a gap is reserved between the vertical pipe and the outer wall of the heat-taking pipe 2.
Example 4
The specification of the heat-collecting pipe 2 is as follows: DN 50-phi 60mm tube.
Claims (4)
1. A method of manufacturing a tube bundle type external heat collector device, the tube bundle type external heat collector device comprising: the device comprises a shell (1), a heat-collecting pipe (2), a small heat-collecting pipe (3), a connecting rod (4), a descending pipe (5), a throttle ring (6) and a bracket (7); the method is characterized in that: the heat-collecting tube (2) is uniformly distributed in the shell (1), a connecting rod (4) is arranged between the tail ends of the heat-collecting tubes (2), the shell (1) is exposed from the upper end of the heat-collecting tube (2), the descending tube (5) is arranged in the heat-collecting tube (2) and is connected with the heat-collecting tube (2) into a whole through a bracket (7), the tail end of the descending tube (5) is positioned at the lower end of the heat-collecting tube (2), a circular throttling ring (6) is arranged at the lower end of the periphery of the descending tube (5), drain holes are uniformly distributed on the throttling ring (6), a drain outlet is arranged at one side of the upper end of the heat-collecting tube (2), small heat-collecting tubes (3) are uniformly distributed at the periphery of the lower part of the heat-collecting tube (2), two adjacent small heat-collecting tubes (3) are staggered in the height direction of the heat-collecting tube (2), and two ends of the small heat-collecting tubes (3) are communicated with the heat-collecting tube (2), and the descending tube (5) and the throttling ring (6) are concentric circles;
a manufacturing method of a tube bundle type external heat collector device comprises the following steps: the lower extreme periphery welding throttle circle (6) of drop tube (5), evenly distributed wash port on throttle circle (6), upper end one side of heat extraction tube (2) sets up the outlet, insert in heat extraction tube (2) drop tube (5) with throttle circle (6), weld support (7) between the inner wall of drop tube (5) periphery and heat extraction tube (2), the lower part periphery evenly distributed little heat extraction tube (3) of heat extraction tube (2), the both ends welding of little heat extraction tube (3) are in the periphery of heat extraction tube (2), the both ends and the heat extraction tube (2) of little heat extraction tube (3) communicate with each other, heat extraction tube (2) are little heat extraction tube (3), drop tube (5), throttle circle (6) and support (7) constitute single heat extraction mechanism, the lower extreme of a plurality of single heat extraction mechanisms is through connecting rod (4) links as an organic wholely to constitute tube bundle heat extraction mechanism, install tube bundle heat extraction mechanism in casing (1), set up various import, export according to actual conditions on casing (1).
2. A method of manufacturing a tube bundle type external heat collector device according to claim 1, wherein: the minimum distance between the periphery of the throttling ring (6) and the inner wall of the heat-taking pipe (2) is 2mm.
3. A method of manufacturing a tube bundle type external heat collector device according to claim 1, wherein: the small heat-taking pipe (3) is formed by symmetrically arranging transverse pipes at two ends of a vertical pipe, the joint of the vertical pipe and the transverse pipes is arc-shaped, the port of the transverse pipe is communicated with the heat-taking pipe (2), and a gap is reserved between the vertical pipe and the outer wall of the heat-taking pipe (2).
4. A method of manufacturing a tube bundle type external heat collector device according to claim 1, wherein: the specification of the heat-collecting pipe (2) is as follows: DN 50-phi 60mm tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346420.XA CN109331748B (en) | 2018-11-13 | 2018-11-13 | Manufacturing method of tube bundle type external heat collector device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346420.XA CN109331748B (en) | 2018-11-13 | 2018-11-13 | Manufacturing method of tube bundle type external heat collector device |
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| CN109331748A CN109331748A (en) | 2019-02-15 |
| CN109331748B true CN109331748B (en) | 2023-12-08 |
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