CN1140764C - Scaling tube full counterflow double shell side axial flow heat exchanger and its heat transfer method - Google Patents
Scaling tube full counterflow double shell side axial flow heat exchanger and its heat transfer method Download PDFInfo
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- CN1140764C CN1140764C CNB011076712A CN01107671A CN1140764C CN 1140764 C CN1140764 C CN 1140764C CN B011076712 A CNB011076712 A CN B011076712A CN 01107671 A CN01107671 A CN 01107671A CN 1140764 C CN1140764 C CN 1140764C
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- 238000000034 method Methods 0.000 title abstract description 11
- 239000012530 fluid Substances 0.000 claims description 17
- 230000008676 import Effects 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009342 intercropping Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
本发明是缩放管全逆流双壳程轴流式换热器及其换热方法。本换热器主要由壳体、隔板、缩放传热管、栅板式管间支承物、两端管板、两端封头盖、壳程及管程进出口管共同连接构成，采用缩放管作为强化传热管，用栅板作为管间支承物，用纵向隔板将壳体分隔为双壳程，壳程流体流道由传热管外壁、壳体内壁、纵向隔板及两端管板构成双壳程轴上往返流道并通过两端管板与封头盖构成双壳程全逆流轴流式换热器。本发明具有传热温差利用率高，流阻小，操作能耗低，传热强化性能好，设备材耗少，投资省，体积紧凑的优点和效果。
The invention relates to a full-counter-current double-shell-side axial flow heat exchanger with zoom tubes and a heat exchange method thereof. The heat exchanger is mainly composed of a shell, a partition, a zoom heat transfer tube, a grid-type tube support, a tube plate at both ends, a head cover at both ends, a shell side and a tube side inlet and outlet tubes. As an enhanced heat transfer tube, the grille is used as the support between the tubes, and the shell is divided into double shells by the longitudinal partition. The plates form double-shell side shaft up-and-coming flow passages, and the double-shell side full-counterflow axial flow heat exchanger is formed through the tube sheets at both ends and the head cover. The invention has the advantages and effects of high heat transfer temperature difference utilization rate, small flow resistance, low operating energy consumption, good heat transfer enhancement performance, less equipment material consumption, less investment, and compact volume.
Description
The present invention is convergent-divergent tube, full counterflow bivalve journey axial flow-type heat exchanger and heat-exchange method thereof, belongs to heat conduction reinforced technical equipment, particularly the shell-and-tube heat transmission equipment.
The shell side structure of shell-and-tube heat exchanger has multiple, what use always in industry is the shell-and-tube heat exchanger of arc baffling dividing plate supporting tube bank, abbreviate baffling dividing plate shell-and-tube heat exchanger as, shell-side fluid comes and goes the baffling motion in the intercropping of baffling dividing plate, the shell-and-tube heat exchanger that screen supporting tube bank is also arranged, China Patent No. is: the shell-and-tube heat exchanger of ZL93243442.8 and cavity ring supporting tube bank, China Patent No. is: 89218385.3, the shell-side fluid of the two kinds of heat exchangers in back is an axial flow, abbreviates shell side axial flow type shell-and-tube heat exchanger as.When cold and hot two logistics volume flows little, and temperature rise and temperature drop are bigger, and cold and hot both sides heat transfer temperature difference hour, above-mentioned heat exchanger all exists following different defective, (1) the heat transfer temperature difference utilization rate of its baffling dividing plate shell-and-tube heat exchanger is low, and often monoshell journey even bivalve journey also are difficult to finish the heat transmission tasks; (2) common shell side axial flow type shell-and-tube heat exchanger mostly is monoshell journey structure, and heat-transfer pipe mostly is plain tube, and therefore when shell both sides logistics capacity is little, if will obtain suitable flow velocity, shell directly will be very little, and the heat exchanger draw ratio is too big, can't settle in industrial system.Owing to above reason, often need many baffling dividing plate shell-and-tube heat exchanger series connection just can finish the heat exchange task in the industry, the equipment investment height, floor space is many, and fluid impedance losses is big.
Purpose of the present invention is exactly in order to solve and to overcome existing heat exchanger heat transfer temperature difference effective rate of utilization under above-mentioned special operation condition condition low, be difficult to finish the heat transfer task, demand is with a plurality of heat exchanger series operations, thereby cause the heat exchanger fluid drag losses big, the operation energy consumption height, equipment investment is big, perhaps the housing draw ratio is excessive, the problem that can't in industrial system, settle and shortcoming, a kind of heat transfer temperature difference effective rate of utilization height that has is invented in research, only need separate unit or two heat exchanger operations, the heat exchanger fluid resistance is little, operation energy consumption is low, low equipment investment, be easy in industrial system, implement the convergent-divergent tube, full counterflow bivalve journey axial flow-type heat exchanger and the heat-exchange method thereof of arrangement.
The present invention realizes by following technical proposals, the structural representation of convergent-divergent tube, full counterflow bivalve journey axial flow-type heat exchanger as shown in Figure 1, its A-A to view as shown in Figure 2, the convergent-divergent pipe as shown in Figure 3, support is shown in Fig. 4～5 between screen formula pipe, and this heat exchanger longitudinally is divided into double-current journey with heat exchanger shell by longitudinal baffle on diameter, and the shell-side fluid runner is the outer wall by heat-transfer pipe, the inwall of housing, the bivalve journey that longitudinal baffle and two ends tube sheet constitute axially come and go runner; It is mainly by heat exchanger shell 1, longitudinal baffle 2, scaling type heat-transfer pipe 3, support 4 between screen formula pipe, two ends tube sheet 5, sealing two ends lid 6, shell side is imported and exported pipe 7,8 and tube side import and export pipe 9,10 connect and compose jointly, its mutual alignment and annexation are: in heat exchanger shell 1, many convergent-divergent heat-transfer pipe 3 is uniform vertically, and weld mutually or expanded joint with housing 1 two ends tube sheet 5, longitudinal baffle 2 is imported and exported pipe 7 near shell side, the tube sheet of 8 one ends, and the inner walls of pasting mutually at the diameter place of tube sheet is tightly connected, housing is divided into two journeys, and longitudinal baffle 2 is having one section breach with other end tube sheet junction stream, constitute the return flow path of shell side runner, two ends end socket lid 6 is connected to form the backflow route of tube side runner and imports and exports pipe 9 with two ends tube sheet 5,10, support 4 equidistantly is placed in interbank vertically and is connected with convergent-divergent heat-transfer pipe 3 between screen formula pipe becomes support between the pipe of heat-transfer pipe, support is divided into vertical grid and two kinds of horizontal grid between screen formula pipe, when shell side is axially settled with two kinds of screens alternate lay with realize to heat-transfer pipe laterally and longitudinal register, prevent tube bundle vibration; Wherein: convergent-divergent heat-transfer pipe 3 is to constitute with continuous contraction and expansion pipeline section by repeating, the pipe thickness uniformity, and the inside and outside both sides of pipe scaled waveform symmetry, support is that convergent-divergent Guan Shangyi the lath more than the rib spacing constitutes by width between screen formula pipe.
The heat-exchange method of this heat exchanger: shell-side fluid is along import and suction casing 1, flow passage vertically, afterbody indentation, there baffling at longitudinal baffle 2 returns, flow passage vertically again, flow out housing from exporting 8 then, tube side fluid enters end socket lid 6 along import 9, and enter tube side from tube sheet 5, making inverse axial flow with shell-side fluid flows, turn back at another end socket lid place, make the two-tube-pass axial flow, flow out tube side from exporting 10 then, tube side and shell-side fluid are done full counter-current flow heat exchange in heat transfer process; Its key is to adopt the convergent-divergent pipe of the concavo-convex finned surface symmetry in the inside and outside both sides of pipe, to two side liquids while augmentation of heat transfer, and by bivalve journey structure, make shell two side liquids when volume flow is not high, also can obtain suitably flow velocity, make that heat transmitter also can obtain higher overall heat-transfer coefficient under full counter-current condition, and the heat transfer temperature difference utilization rate of heat exchanger can reach 100%, by screen as support between the pipe of convergent-divergent tube bank, fluid resistance is little, and shell-side pressure drop is low.
The present invention compared with prior art, have following advantage and beneficial effect: (1) this heat exchanger is the full contra-flow heat exchanger that adopts enhanced type convergent-divergent heating surface bank and bivalve pass heat exchanger structure to form, tube side and shell-side fluid are full countercurrent flow in heat transfer process in the heat exchanger, the heat transfer temperature difference utilization rate reaches 100%, has avoided the little shortcoming of the effective heat transfer temperature difference of cross-flow heat exchange in the prior art; Keep high flow velocities simultaneously, obtain higher overall heat-transfer coefficient; (2) owing to support convection cell drag losses between the screen pipe is little, the heat exchanger shell pass pressure drop is low, required fluid carries power consumption little, so it is little that this heat exchanger shell pass axial flow structure has fluid impedance losses, the operation advantage of low energy consumption, avoid the high-drag that baffling dividing plate convection cell causes in prior art loss, can save operation energy consumption greatly; (3) heat exchanger adopts the convergent-divergent pipe as heat-transfer pipe, can also can obtain the good heat transfer strengthening effect under the not high condition of flow velocity, and this helps to shorten heat-transfer pipe length, and the long shortcoming of pipe range when avoiding using plain tube is easy to settle in industrial system; (4) owing to adopted efficient heat conducting tube and the full countercurrent heat exchange method of bivalve journey axial flow, the heat transfer property of heat exchanger significantly improves, especially under turbulent-flow conditions (Re number＞5000), adopt the vertical fluid that flows in the inside and outside both sides of scaling type heat-transfer pipe of the concavo-convex finned surface symmetry in the inside and outside both sides of pipe to make to strengthen heat convection, can obtain two-sided good heat transfer strengthening effect, both sides fluid heat transferring film coefficient is higher; Can significantly reduce required heat exchange area, invest can have by a relatively large margin than the heat transmission equipment of prior art and reduce, volume compact is convenient to the I﹠M of equipment simultaneously.
Below Figure of description is further specified as follows: Fig. 1 is the structural representation of convergent-divergent tube, full counterflow bivalve journey axial flow-type heat exchanger; Fig. 2 is that the A-A of Fig. 1 is to view; Fig. 3 is a convergent-divergent pipe schematic diagram; Fig. 4, Fig. 5 all are support schematic diagrames between screen formula pipe.
Embodiments of the present invention are comparatively simple, can select for use stainless steel or carbon steel to make material, can adopt common sheet metal technology and machine-tooled method and equipment to process.Implement the present invention,, and be linked and packed by the described interconnected relationship of top specification and constitute flow passage structure shown in Figure 1, just can implement the present invention preferably as long as by design shown in Fig. 1～5, add each parts of cost device.For example, the inventor recommends the housing of design by φ 500 * 6 * 6000mmmm, vertically housing is divided into two journeys with 488 * 5750mm longitudinal baffle, the convergent-divergent pipe of 300 φ 19 * 2 * 6000mm of every Cheng Junbu, pipe joins with two ends φ 560 * 20mm tube sheet by square arrangement, locatees with the supporting of screen formula support between pipe, prevent tube bundle vibration, tube sheet place in two ends seals with φ 500 * 500mm end socket lid.
Claims (3)
1, a kind of convergent-divergent tube, full counterflow bivalve journey axial flow-type heat exchanger, it is characterized in that: this heat exchanger longitudinally is divided into double-current journey with heat exchanger shell by longitudinal baffle on diameter, the shell-side fluid runner is the outer wall by heat-transfer pipe, the inwall of housing, the bivalve journey that longitudinal baffle and two ends tube sheet constitute axially come and go runner; It is mainly by heat exchanger shell (1), longitudinal baffle (2), scaling type heat-transfer pipe (3), support (4) between screen formula pipe, two ends tube sheet (5), sealing two ends lid (6), shell side is imported and exported pipe (7), (8) and tube side import and export pipe (9), (10) connect and compose jointly, its mutual alignment and annexation are: in heat exchanger shell (1), many convergent-divergent heat-transfer pipes (3) are uniform vertically, and weld mutually or expanded joint with housing (1) two ends tube sheets (5), longitudinal baffle (2) is imported and exported pipe (7) near shell side, the tube sheet of (8) one ends, and the inner walls of pasting mutually at the diameter place of tube sheet is tightly connected, housing is divided into two journeys, and longitudinal baffle (2) is having one section breach with other end tube sheet junction stream, constitute the return flow path of shell side runner, two ends end socket lids (6) are connected to form the backflow route of tube side runner and import and export pipe (9) with two ends tube sheet (5), (10), support (4) equidistantly is placed in interbank vertically and is connected with convergent-divergent heat-transfer pipe (3) between screen formula pipe becomes support between the pipe of heat-transfer pipe, support is divided into vertical grid and two kinds of horizontal grid between screen formula pipe, when shell side is axially settled with two kinds of screens alternate lay with realize to heat-transfer pipe laterally and longitudinal register, prevent tube bundle vibration.
2,, it is characterized in that described convergent-divergent pipe heat-transfer pipe (3) is by repeating to constitute the pipe thickness uniformity with continuous contraction and expansion pipeline section by the described a kind of convergent-divergent tube, full counterflow of claim 1 bivalve journey axial flow-type heat exchanger.
3, by the described a kind of convergent-divergent tube, full counterflow of claim 1 bivalve journey axial flow-type heat exchanger, its feature is also between described screen formula pipe that support is is that convergent-divergent Guan Shangyi the lath more than the rib spacing constitutes by width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011076712A CN1140764C (en) | 2001-03-24 | 2001-03-24 | Scaling tube full counterflow double shell side axial flow heat exchanger and its heat transfer method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB011076712A CN1140764C (en) | 2001-03-24 | 2001-03-24 | Scaling tube full counterflow double shell side axial flow heat exchanger and its heat transfer method |
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| CN1320802A CN1320802A (en) | 2001-11-07 |
| CN1140764C true CN1140764C (en) | 2004-03-03 |
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| CNB011076712A Expired - Fee Related CN1140764C (en) | 2001-03-24 | 2001-03-24 | Scaling tube full counterflow double shell side axial flow heat exchanger and its heat transfer method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111878A (en) * | 2010-09-17 | 2016-11-16 | 肖特股份有限公司 | For the method manufacturing ring-type element or plate element |
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| CN100334416C (en) * | 2004-02-10 | 2007-08-29 | 华南理工大学 | Shell and tube type heat exchanger with sharply enlarged accelerated flow zooming tube bundle and hollow ring |
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2001
- 2001-03-24 CN CNB011076712A patent/CN1140764C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111878A (en) * | 2010-09-17 | 2016-11-16 | 肖特股份有限公司 | For the method manufacturing ring-type element or plate element |
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| CN1320802A (en) | 2001-11-07 |
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