CN210441711U - All-welded plate type gas-gas heat exchanger - Google Patents
All-welded plate type gas-gas heat exchanger Download PDFInfo
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- CN210441711U CN210441711U CN201920725758.XU CN201920725758U CN210441711U CN 210441711 U CN210441711 U CN 210441711U CN 201920725758 U CN201920725758 U CN 201920725758U CN 210441711 U CN210441711 U CN 210441711U
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- 238000003825 pressing Methods 0.000 claims description 28
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000000994 depressogenic effect Effects 0.000 claims 3
- 239000003546 flue gas Substances 0.000 abstract description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 39
- 239000007789 gas Substances 0.000 abstract description 15
- 230000008021 deposition Effects 0.000 abstract description 8
- 239000000428 dust Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000002087 whitening effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- MXWHMTNPTTVWDM-NXOFHUPFSA-N mitoguazone Chemical compound NC(N)=N\N=C(/C)\C=N\N=C(N)N MXWHMTNPTTVWDM-NXOFHUPFSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to an all-welded plate heat exchanger technical field especially relates to an all-welded plate-type gas heat exchanger for flue gas and air heat transfer, including air inlet pipe case, air outlet pipe case, flue gas inlet pipe case, flue gas outlet pipe case, plate bundle, telescoping parts, the utility model discloses flue gas heat exchanger runner jam, deposition, thermal energy inefficacy scheduling problem have effectively been solved.
Description
Technical Field
The utility model relates to an all-welded plate heat exchanger application especially relates to an all-welded plate gas heat exchanger application for flue gas heat transfer.
Background
The smoke exhaust loss is important heat loss in the use of an industrial boiler, the smoke exhaust temperature is reduced, energy can be effectively saved, the economical efficiency is improved, remarkable environmental protection benefits and social benefits can be brought, and an important device for recovering the waste heat of the smoke is a smoke heat exchanger.
With the implementation of environmental protection policies, reducing the exhaust gas temperature and recycling waste heat are no longer the only requirements. At present, the requirement for whitening of flue gas in various industries gradually appears, wherein flue gas of wet desulphurization (including wet flue gas with the exhaust gas temperature of 45-75 ℃) is required to be discharged after whitening so as to reduce the pollution to air, and the existing whitening technical route mainly comprises the following steps: the process comprises a wet flue gas condensation and white light elimination process, a wet flue gas heating and white light elimination process and an MGGH (flue gas cooling-desulfurization-flue gas heating) white light elimination technology process, wherein in the process systems, flue gas heat exchangers are very key heat exchange equipment.
Due to the complexity of the components of the flue gas, most of the flue gas contains a large amount of dust, NOx, SO2 and SO3, and the problems of low-temperature corrosion, dust deposition, blockage, low heat transfer efficiency, low resistance and the like of the flue gas heat exchanger are common.
For the existing all-welded plate heat exchanger applied to the gas-gas heat exchanger, the difference between the wall thickness of the heat transfer element and the wall thickness of the external reinforcing part is large, and the corresponding heat capacity difference is large, so that the problem of thermal expansion difference generated due to the thermal response problem in the processes of temperature rise and temperature drop becomes a key problem influencing the safety and reliability of equipment.
SUMMERY OF THE UTILITY MODEL
Aiming at a gas-gas heat exchanger, in particular to a gas-gas heat exchanger, under the premise of solving the problems of dust deposition and blockage of flue gas, in order to solve the problem of poor thermal expansion between a heat transfer element and a structural member, the invention provides an all-welded plate type gas-gas heat exchanger for heat exchange of the flue gas.
To the flue gas deposition, block up the problem, the utility model discloses a straight passageway structure solves, use flue gas air heat exchanger as an example, air dust content is little under the normal conditions, volume flow is less, it is higher to allow the resistance to fall, and flue gas dust content is big, volume flow is big, it is less to allow the resistance to fall, consequently when the structure design, the air flows along the longer passageway of journey, the flue gas flows along the shorter passageway of journey, in the aspect of control flue gas passageway deposition, reduce the deposition through eliminating flue gas stream or mobile stagnation point on the one hand, simultaneously through setting up the vortex ripple, can strengthen heat transfer on the one hand, can play vortex and cleaning action on the other hand, kill many birds with one stone.
To the thermal energy problem, based on the structure particularity of all-welded plate heat exchanger, can't set up outside rectangle expansion joint and inside rectangle expansion joint according to shell and tube heat exchanger (shell and tube heat exchanger tube bank has certain axial rigidity, simultaneously under the reinforcing effect of baffling board, can be independent of outside casing, so can adopt outside rectangle expansion joint and inside rectangle expansion joint to absorb thermal expansion, and the corrugated sheet rigidity of welded plate heat exchanger is poor, almost not have the bearing capacity, can not break away from the pressure strip and exist alone, and the pressure strip does not have the casing outward again, so can not directly adopt the thermal expansion structure of shell and tube heat exchanger), the utility model discloses a thermal energy is solved to stiff end and slip end mode, has not only solved corrugated sheet pressure-bearing and support problem, has still solved the thermal energy problem.
To sum up, the creativity and novelty of the utility model are as follows:
(1) the utility model discloses creatively directly says structure gas heat exchanger structure, promptly, along flue gas flow direction (medium B flow direction), the flue gas loops through heat exchanger flue gas inlet reducer, the flue gas runner that forms after the heat transfer element folds, when heat exchanger exhanst gas outlet reducer, the flow direction of flue gas remains unchanged basically, simultaneously in the flue gas runner, leave the clearance between the protruding ripple of two liang of relative ripple slabs and the protruding ripple, do not have the flow field stagnation point that ripple contact and contact produced promptly along the direction that the flue gas flows, the deposition problem because the flow field stagnation point produced has been eliminated.
(2) The utility model discloses creatively proposes: the plate stack forming the plate bundle is connected with one end of the compression plate to form a fixed end, the other end of the plate stack is connected with the other end of the compression plate to form a sliding end through the telescopic component, the telescopic component can absorb the expansion difference between the heat transfer element and the compression plate, and the compression plate plays a role in supporting and reinforcing the telescopic component due to the fact that the operating pressure of the medium B is higher than that of the medium A, and the pressure bearing capacity of the telescopic component is improved.
(3) Adopt the utility model provides a structural scheme through multiple means such as adjustment ripple slab length, width, board bundle quantity, guarantees that flue gas passageway (medium B passageway) is under the prerequisite of direct passageway, can realize the medium combination under the different operating parameter condition, and to a great extent has improved equipment application scope.
The utility model discloses a realize through following technical scheme:
an all-welded plate type gas-gas heat exchanger comprises a medium A inlet pipe box, a medium A outlet pipe box, a medium B inlet pipe box, a medium B outlet pipe box, a plate bundle and a telescopic component, wherein,
the plate bundle comprises a plate stack and a pressing plate, wherein the plate stack is composed of corrugated plate sheets, every two corrugated plate sheets are buckled to form a plate pair, a plurality of plate pairs are stacked to form the plate stack with a rectangular cross section, and a medium A flow channel and a medium B flow channel are arranged on two sides of each corrugated plate sheet;
the medium A inlet channel box and the medium A outlet channel box are respectively communicated with an inlet and an outlet of the medium A flow channel, and the medium B inlet channel box and the medium B outlet channel box are respectively communicated with an inlet and an outlet of the medium B flow channel;
the pressure strip folds fixed connection with the board along the both ends of ripple slab axis direction, one end, forms the stiff end, and the other one end corresponding with the stiff end is folded through flexible part and is connected with the board, forms the slip end, and when the board folded and pressure strip had the inflation difference, the slip end slided to the outside along ripple slab axis direction.
According to the technical scheme, preferably, the telescopic part is a rectangular expansion joint, one end of the pressing plate is connected with the plate stack through the rectangular expansion joint, and when expansion difference exists between the plate stack and the pressing plate, the sliding end slides along the axial direction of the corrugated plate; the rectangular expansion joint is of a reverse waveform structure, namely the corrugation of the rectangular expansion joint is concave relative to the connecting straight edge of the rectangular expansion joint.
According to the above technical scheme, preferably, the corrugated plate sheet includes equally spaced raised support corrugations, recessed pressure-bearing corrugations, and raised heat transfer corrugations, the sum of the heights of the raised support corrugations is equal to the height of the medium B flow channel, the sum of the depths of the recessed pressure-bearing corrugations is equal to the height of the medium a flow channel, the sum of the heights of the raised heat transfer corrugations is less than the height of the medium B flow channel, and a channel of the medium B in the flow direction is a straight channel.
According to the above technical solution, preferably, a plurality of parallel plate stacks are arranged along the flow direction of the medium B, and one ends of the plate stacks adjacent to each other up and down are communicated through a medium B pipe box to form an inverted header of the medium B.
According to the above technical solution, preferably, the plate bundle further includes a medium a inlet side plate, a medium a outlet side plate, a medium B inlet side plate, and a medium B outlet side plate connected to the outer end of the pressing plate, wherein,
the medium A inlet side plate and the pressing plate form a rectangular interface of a medium A inlet, and the medium A inlet pipe box is connected with the plate stack through the rectangular interface;
the medium A outlet side plate and the pressing plate form a rectangular interface of a medium A outlet, and a medium A outlet pipe box is connected with the plate stack through the rectangular interface;
the medium B inlet side plate and the pressing plate form a rectangular interface of a medium B inlet, and the medium B inlet pipe box is connected with the plate stack through the rectangular interface;
the medium B outlet side plate and the pressing plate form a rectangular interface of a medium B outlet, and the medium B outlet pipe box is connected with the plate stack through the rectangular interface.
According to the technical scheme, preferably, the inner opening of the rectangular expansion joint is provided with a reinforcing plate.
The utility model has the advantages that:
(1) the corrugated plates form a plate stack, and a medium A flow channel and a medium B flow channel are arranged on two sides of each corrugated plate, so that the heat exchange efficiency is high; the built-in sliding end (on the basis of the structure of the telescopic part) is utilized, so that the problem of thermal expansion of the all-welded plate heat exchanger is effectively solved;
(2) the problems of dust accumulation, blockage and resistance reduction commonly existing in gas-gas heat exchangers, particularly flue gas/air heat exchangers in the prior art are solved;
(3) the length, the width, the plate bundle number and other various combination modes of the corrugated plate are utilized to meet different application requirements.
Drawings
Fig. 1 is an embodiment of an example of the present invention.
Fig. 2 is a longitudinal sectional view of an embodiment of the invention.
Fig. 3 and 4 show two other embodiments of the present invention.
Fig. 5 is a schematic structural view of a corrugated sheet constituting the present invention.
Fig. 6 is a schematic diagram of a straight channel structure constituting the plate bundle of the present invention.
In the figure: 1. a medium A inlet header; 2. a compression plate; 3. a corrugated sheet; 301. heat transfer corrugations; 302. pressure-bearing corrugation; 303. supporting the corrugations; 4. a medium B outlet pipe box; 5. a rectangular expansion joint; 6. a medium B outlet side plate; 7. a medium A outlet side plate; 8. a medium A outlet pipe box; 9. a medium B inlet channel box; 10. a medium B inlet side plate; 11. a medium A inlet side plate; 12. turning over the header; 13. a rectangular expansion joint reinforcing plate;
H1. media B flow channel height, h2, media B flow channel side corrugation lobe height, H3. media B flow channel other side corrugation lobe height, H4. raised corrugation gap.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in figure 1, the utility model comprises a medium A inlet pipe box 1, a pressing plate 2, corrugated plates 3, a medium B outlet pipe box 4, a rectangular expansion joint 5, a medium B outlet side plate 6, a medium A outlet side plate 7, a medium A outlet pipe box 8, a medium B inlet pipe box 9, a medium B inlet side plate 10 and a medium A inlet side plate 11, wherein, after every two corrugated plates 3 are buckled, a plate pair is formed after a plurality of plates are oppositely overlapped, the plate stack with rectangular cross section is formed, a medium A flow channel and a medium B flow channel are respectively formed at two sides of the corrugated plates 3, the plate stack is in the length direction of the corrugated plates 3 along the medium A flow direction, the width direction of the corrugated plates 3 along the medium B flow direction, the pressing plate 2 is arranged at the outermost side of the plate stack, the pressing plate 2 plays a role in pressing and reinforcing roles, the pressing plate 2 is in the length direction and/width direction, one end is directly connected with the plate, the other end is connected with the plate stack through a telescopic component, correspondingly, the directly connected end is used as a fixed end of the plate stack, and the end connected with the telescopic component is used as a sliding end of the plate stack.
According to the above embodiment, preferably, the expansion member is a reversed rectangular expansion joint 5 (with respect to the welding straight edge, the corrugation is concave toward the medium a side), one end of the pressure plate 2 is directly connected to the plate stack, the other end is connected to the plate stack through the rectangular expansion joint 5, accordingly, the directly connected end serves as a fixed end (left end in the drawing) of the plate stack, and the end connected to the rectangular expansion joint 5 serves as a sliding end of the plate stack.
Referring to fig. 2, the plate stack and the rectangular expansion joint 5 are both attached to the pressing plate 2, and in the other direction, a medium a outlet side plate 7 is arranged on the outer side of the rectangular expansion joint 5, the pressing plate 2 and the medium a outlet side plate 7 support and reinforce the rectangular expansion joint 5, the pressing plate 2 is attached to the plate stack, so that the overall rigidity of the plate stack is ensured, and when an expansion difference occurs between the plate stack and the pressing plate 2, the plate stack can slide in the axial direction to eliminate the problem of thermal expansion; as shown in fig. 1, the medium a inlet side plate 11 and the pressing plate 2 form a rectangular interface of the medium a inlet, and the medium a inlet channel box 1 is connected with the plate stack through the rectangular interface; the medium A outlet side plate 7 and the pressing plate 2 form a rectangular interface of a medium A outlet, and a medium A outlet pipe box 8 is connected with the plate stack through the rectangular interface; a medium B inlet side plate 10 and the pressing plate 2 form a rectangular interface of a medium B inlet, and a medium B inlet pipe box 9 is connected with the plate stack through the rectangular interface; the medium B outlet side plate 6 and the pressing plate 2 form a rectangular interface of a medium B outlet, and the medium B outlet pipe box 4 is connected with the plate stack through the rectangular interface. In general, the operating pressure of the medium A is greater than that of the medium B, and because the outside of the rectangular expansion joint 5 is adjacent to the pressing plate 2 and the medium A outlet side plate 7, the pressing plate 2 and the medium A outlet side plate 7 play a role in reinforcing the rectangular expansion joint 5, and the pressure-bearing capacity of the rectangular expansion joint 5 is ensured.
Preferably, the medium a inlet side plate 11 may be integrated with the medium a inlet channel box 1, the medium a outlet side plate 7 may be integrated with the medium a outlet channel box 8, the medium B inlet side plate 10 may be integrated with the medium B inlet channel box 9, and the medium B outlet side plate 6 may be integrated with the medium B outlet channel box 4, so as to effectively enhance the sealing effect and the structural rigidity.
As shown in fig. 3, it is explained with reference to fig. 1 that two parallel plate stacks are arranged along the flow direction of the medium B, the tails of the two plate stacks are connected by an overturning header 12, and by adjusting the width, length and number of the plate stacks of the corrugated plate 3, on the premise of ensuring the straight channel structure of the medium B, the operation requirements of different flow rates and different operation parameters are met, and the application range of the heat exchanger is expanded.
As shown in fig. 4, in conjunction with fig. 1, when the operating pressure of the medium a is smaller than the operating pressure of the medium B, a reinforcing plate 13 of the rectangular expansion joint 5 is provided at the inner opening of the rectangular expansion joint 5 for ensuring the pressure-bearing capacity of the rectangular expansion joint 5.
As shown in fig. 5 and 6, in order to solve the problems of dust accumulation and blockage in the flow channel of the medium B and simultaneously take heat transfer efficiency into consideration, the corrugated plate 3 comprises raised supporting corrugations 303, recessed pressure-bearing corrugations 302 and raised heat transfer corrugations 301 which are at equal intervals, every two corrugated plates 3 are buckled to form a plate pair, a flue gas flow channel and an air flow channel are respectively formed at two sides of the corrugated plate 3 after the plate pairs are overlapped, the recessed pressure-bearing corrugations 302 form contacts in the air flow channel, the contacts play a role in supporting and bearing, the sum of the heights of the raised supporting corrugations 303 is equal to the height of the flue gas flow channel, namely, a supporting and pressure-bearing point at the flue gas side is formed, the raised heat transfer corrugations 301 protrude into the flue gas flow channel, the sum of the heights of the raised heat transfer corrugations 301 is less than the height of the flue gas flow channel, namely, the sum of the height H2 of the corrugated bulge height at one side of the flow channel of the medium B and, the raised ripple gap H4 is larger than zero, so that the gas inlet and outlet reducer of the gas-gas heat exchanger is not only arranged, but also no other contact points are arranged in the flue gas flow channel except the contact of the supporting ripples 303, thereby ensuring the basically unchanged flow direction and the uniformity of the flow field of the flue gas, and having ideal effects on eliminating the problems of dust deposition, blockage, abrasion and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An all-welded plate type gas-gas heat exchanger is characterized by comprising a medium A inlet pipe box, a medium A outlet pipe box, a medium B inlet pipe box, a medium B outlet pipe box, a plate bundle and a telescopic component, wherein,
the plate bundle comprises a plate stack and a pressing plate, wherein the plate stack is composed of corrugated plate sheets, every two corrugated plate sheets are buckled to form a plate pair, a plurality of plate pairs are stacked to form the plate stack with a rectangular cross section, and a medium A flow channel and a medium B flow channel are arranged on two sides of each corrugated plate sheet;
the medium A inlet channel box and the medium A outlet channel box are respectively communicated with an inlet and an outlet of the medium A flow channel, and the medium B inlet channel box and the medium B outlet channel box are respectively communicated with an inlet and an outlet of the medium B flow channel;
the pressure strip folds fixed connection with the board along the both ends of ripple slab axis direction, one end, forms the stiff end, and the other one end corresponding with the stiff end is folded through flexible part and is connected with the board, forms the slip end, and when the board folded and pressure strip had the inflation difference, the slip end slided to the outside along ripple slab axis direction.
2. The all-welded plate type gas-gas heat exchanger according to claim 1, wherein the telescopic member is a rectangular expansion joint, one end of the compression plate is connected with the plate stack through the rectangular expansion joint, and when the plate stack and the compression plate have expansion difference, the sliding end slides along the axial direction of the corrugated plate; the rectangular expansion joint is of a reverse waveform structure, namely the corrugation of the rectangular expansion joint is concave relative to the connecting straight edge of the rectangular expansion joint.
3. An all-welded plate type gas-gas heat exchanger according to claim 1 or 2, wherein the corrugated plate sheet comprises equally spaced raised support corrugations, depressed bearing corrugations and raised heat transfer corrugations, the plates are arranged in a medium A flow channel and a medium B flow channel formed by stacking, the sum of the heights of the raised support corrugations is equal to the height of the medium B flow channel, the sum of the depths of the depressed bearing corrugations is equal to the height of the medium A flow channel, the sum of the heights of the depressed heat transfer corrugations is less than the height of the medium B flow channel, and the channel of the medium B in the flow direction is a straight channel.
4. An all-welded plate type gas-gas heat exchanger according to claim 1 or 2, wherein a plurality of parallel plate stacks are arranged along the flow direction of the medium B, and one ends of the upper and lower adjacent plate stacks are communicated through a medium B pipe box to form an overturning header tank of the medium B.
5. An all-welded plate gas-gas heat exchanger according to claim 1 or 2, wherein the plate bundle further comprises a medium A inlet side plate, a medium A outlet side plate, a medium B inlet side plate and a medium B outlet side plate connected to the outer ends of the hold-down plates, wherein,
the medium A inlet side plate and the pressing plate form a rectangular interface of a medium A inlet, and the medium A inlet pipe box is connected with the plate stack through the rectangular interface;
the medium A outlet side plate and the pressing plate form a rectangular interface of a medium A outlet, and a medium A outlet pipe box is connected with the plate stack through the rectangular interface;
the medium B inlet side plate and the pressing plate form a rectangular interface of a medium B inlet, and the medium B inlet pipe box is connected with the plate stack through the rectangular interface;
the medium B outlet side plate and the pressing plate form a rectangular interface of a medium B outlet, and the medium B outlet pipe box is connected with the plate stack through the rectangular interface.
6. An all-welded plate type gas-gas heat exchanger according to claim 2, wherein the inner opening of the rectangular expansion joint is provided with a reinforcing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920725758.XU CN210441711U (en) | 2019-05-17 | 2019-05-17 | All-welded plate type gas-gas heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920725758.XU CN210441711U (en) | 2019-05-17 | 2019-05-17 | All-welded plate type gas-gas heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN210441711U true CN210441711U (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920725758.XU Withdrawn - After Issue CN210441711U (en) | 2019-05-17 | 2019-05-17 | All-welded plate type gas-gas heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220400A (en) * | 2019-05-17 | 2019-09-10 | 天津华赛尔传热设备有限公司 | A kind of full-welding plate-type gas-gas heat exchanger |
-
2019
- 2019-05-17 CN CN201920725758.XU patent/CN210441711U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220400A (en) * | 2019-05-17 | 2019-09-10 | 天津华赛尔传热设备有限公司 | A kind of full-welding plate-type gas-gas heat exchanger |
| CN110220400B (en) * | 2019-05-17 | 2024-03-29 | 天津华赛尔传热设备有限公司 | All-welded plate type gas-gas heat exchanger |
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