CN202853459U - Top plate of tubular gas-to-gas heat exchanger - Google Patents
Top plate of tubular gas-to-gas heat exchanger Download PDFInfo
- Publication number
- CN202853459U CN202853459U CN201220456516.3U CN201220456516U CN202853459U CN 202853459 U CN202853459 U CN 202853459U CN 201220456516 U CN201220456516 U CN 201220456516U CN 202853459 U CN202853459 U CN 202853459U
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- China
- Prior art keywords
- fluoroplastics
- orifice plate
- heat exchanger
- pole plate
- carbon steel
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Abstract
The utility model relates to a top plate of a tubular gas-to-gas heat exchanger. The top plate comprises the top fluoroplastics pole plate, a carbon steel pole plate, and a bottom fluoroplastics pole plate, wherein the top fluoroplastics pole plate naturally adjoins the top of the carbon steel pole plate, the bottom fluoroplastics pole plate is arranged below the carbon steel pole plate. The top fluoroplastics pole plate, the carbon steel pole plate, and the bottom fluoroplastics pole plate are fixed between a top framework and a wallboard. Due to the fact that a special structure is adopted, the top plate comprises the top fluoroplastics pole plate has the advantages of avoiding corrosion to a tubular gas-to-gas heat exchanger metal tube plate by the smoke on one hand, achieving effective sealing between the top plate and a heat exchange tube on the other hand, and meanwhile solving problems that common sealing device are prone to lose effectiveness under corrosion of the smoke and needs to be changed frequently.
Description
Technical field
The utility model relates to a kind of tubular type gas-gas heat exchanger (GGH), relates in particular to the top board with a kind of tubular type gas-gas heat exchanger (GGH).
Background technology
Utilize wet limestone-gypsum FGD to be widely used on the Chinese large-sized generating plant pulverized coal boiler.But, because the flue-gas temperature of processing through wet desulphurization is all lower, when the flue gas that temperature is excessively low is discharged from chimney, the buoyance lift height descends, the simultaneously also corresponding decline of the velocity of discharge of flue gas, be that chimney relative efficiency height reduces, cause to spread fully from the remaining harmful substance that chimney is discharged that ambient atmosphere is subject to severe contamination.Desulfurizer arranges heat exchanger and desulfuration absorbing tower can be exported the cigarette temperature and bring up to about 80 ℃, both can improve atmosphere hoist height, can reduce again flue, chimney dewing corrosion behind the desulphurization plant simultaneously.The desulphurization system of more domestic large-scale power station units adopts steam one flue gas heat-exchange unit (SGH) or swinging GGH to improve clean flue gas exhaust gas temperature more at present, but therefore higher, the easy leakage of such heat exchanger energy consumption, poor reliability have become one of factor that affects the normal operation of unit.
Tubular type gas-gas heat exchanger (GGH) is a kind of heat transmission equipment that utilizes high temperature fluid waste-heat cryogen.Tubular type GGH mainly is comprised of housing (wallboard) and hundreds and thousands of heat exchanger tubes.Wherein, the wallboard bottom is former exhaust gases passes, and top is clean exhaust gases passes, and the centre is separated by tube sheet.Tube sheet comprises top board, middle orifice plate and bottom orifice plate etc.Take sealing device sealing between tube sheet pore and the heat exchanger tube, formed effectively the cutting apart of former flue gas, clean flue gas and air, make their mutually not blowby.
Because, the SO of Wet Fgd By Limestone technique
3Removal efficiency only has about 30%, thereby, SO in the flue gas after the desulfurization
3Concentration is approximately 25～45mg/m
3There is data to show, generally speaking, works as SO
3Concentration reaches 10～20mg/m
3The time, flue gas dew point will sharply be elevated to more than 100 ℃, like this, even flue gas is heated to about 80 ℃ through GGH, corrodes still inevitable.
And the tube sheet in the tubular type gas-gas heat exchanger (GGH) contacts with flue gas with heat exchanger tube for a long time.At present, people improve for the material of heat exchanger tube, can effectively avoid flue gas to corrode, and corrode not fully research but how effectively to avoid being subject to flue gas for tube sheet.In the prior art, only adopt metal tube sheets to cut apart flue gas, easily metal tube sheets is caused corrosion.And sealing device exposes to the open air for a long time under flue gas, also loses efficacy easily, thereby leaks.Flue gas is to the corrosion of metal tube sheets, and the leakage that causes thus is the key factor that restriction tubular type gas-gas heat exchanger (GGH) uses.
The utility model content
The purpose of this utility model provides a kind of novel top panel of tubular type gas-gas heat exchanger, and described top board comprises that described top board comprises top fluoroplastics orifice plate, carbon steel orifice plate and bottom fluoroplastics orifice plate.Wherein, described top fluoroplastics orifice plate by gravity naturally depend on described carbon steel orifice plate above, described bottom fluoroplastics orifice plate be positioned at described carbon steel orifice plate below; Described top fluoroplastics orifice plate, described carbon steel orifice plate and described bottom fluoroplastics orifice plate are fixed between top frame and the wallboard.
Preferably, in described top board, described top fluoroplastics orifice plate, described carbon steel orifice plate and described bottom fluoroplastics orifice plate are connected with the bolt that is fixedly connected as between described top frame and the described wallboard.
Preferably, in described top board, between described top fluoroplastics orifice plate and the described heat exchanger tube for being fixedly connected with.
Preferably, in described top board, be fixedly connected as welding between described top fluoroplastics orifice plate and the described heat exchanger tube.
Preferably, in described top board, the described pore internal diameter size of described bottom fluoroplastics orifice plate is less than the outside dimension of described heat exchanger tube.
Top board described in the utility model has the pore that matches with heat exchanger tube, there is minor face at the place at described pore, join with described top fluoroplastics orifice plate, described bottom fluoroplastics orifice plate respectively, described minor face and described heat exchanger tube near, fix by frictional force between described minor face and the described heat exchanger tube.
The utility model is by described roof construction, so that flue gas can not contact with metal perforated plate, but contacts corrosion resistant fluoroplastics orifice plate, thereby avoided flue gas attack metal orifice plate, prolonged the service life of top board; And, do not have other sealing device between top board pore and the heat exchanger tube, be minor face by the fluoroplastics orifice plate and heat exchanger tube near the sealing that realizes, thereby avoided owing to flue gas lost efficacy and frequent for the sealing device that the erosion of sealing device causes.
Since the minor face of bottom fluoroplastics orifice plate and heat exchanger tube near, and the pore internal diameter size of bottom fluoroplastics orifice plate is less than the outside dimension of heat exchanger tube, thereby fixes by frictional force between the minor face of bottom fluoroplastics orifice plate and the heat exchanger tube.When equipment moves, bottom fluoroplastics orifice plate expanded by heating, the pore internal diameter further dwindles, and behind the heat exchanger tube expanded by heating, external diameter further enlarges, both can realize effective sealing.Thereby avoided on the one hand flue gas attack metal orifice plate, avoided on the other hand smoke spillage, realize the effective sealing between top board pore and the heat exchanger tube, solved simultaneously common sealing device and under flue gas corrodes, lost efficacy easily, needed the difficult problem of frequent.
The utility model is by the special construction of this top board, avoided on the one hand the corrosion of flue gas for tubular type gas-gas heat exchanger (GGH) metal tube sheets, can realize on the other hand the effective sealing between top board pore and the heat exchanger tube, solve simultaneously sealing device commonly used and under flue gas corrodes, lost efficacy easily, needed the difficult problem of frequent.
Description of drawings
Fig. 1 is the cutaway view of the top board of tubular type gas-gas heat exchanger of the present utility model
Description of reference numerals is as follows:
Top fluoroplastics orifice plate 1, carbon steel orifice plate 2, top frame 3, bottom fluoroplastics orifice plate 4, heat exchanger tube 5, wallboard 6.
The specific embodiment
For making the auditor can further understand structure of the present utility model, feature and other purposes, now being accompanied by accompanying drawing in conjunction with appended preferred embodiment is described in detail as follows, the illustrated embodiment of this accompanying drawing only is used for the explanation the technical solution of the utility model, and non-limiting the utility model.
As shown in Figure 1, Figure 1 shows that the cutaway view of the top board of tubular type gas-gas heat exchanger of the present utility model.Wherein, the top board of tubular type gas-gas heat exchanger is comprised of top fluoroplastics orifice plate 1, carbon steel orifice plate 2, bottom fluoroplastics orifice plate 4, wherein top fluoroplastics orifice plate 1 be positioned at carbon steel orifice plate 2 above, bottom fluoroplastics orifice plate 4 be positioned at carbon steel orifice plate 2 below; Top fluoroplastics orifice plate 1, carbon steel orifice plate 2 and bottom fluoroplastics orifice plate 4 and are bolted between top frame 3 and wallboard 6.In the top board of tubular type gas-gas heat exchanger of the present utility model, be welding between top fluoroplastics orifice plate 1 and the heat exchanger tube 5; Bottom fluoroplastics orifice plate 4 is because its pore internal diameter size is less than the outside dimension of heat exchanger tube, so rely on frictional force to fix between minor face and the heat exchanger tube 5.
The top board of tubular type gas-gas heat exchanger of the present utility model, when work, top board and heat exchanger tube 5 temperature rise, and the temperature of bottom fluoroplastics orifice plate 4 also rises.Thus, bottom fluoroplastics orifice plate 4 expanded by heating, its pore internal diameter size further dwindles, and with its minor face near heat exchanger tube 5, because expanded by heating, its outside dimension further increases, and has increased the frictional force between minor face and the heat exchanger tube 5, thereby has realized the effective sealing between bottom fluoroplastics orifice plate 4 pores and the heat exchanger tube 5.This sealing means effectively reduces cost, need not simultaneously manually-operated, has improved production efficiency and sealing reliability.
Described top board of the present utility model has the pore that matches with heat exchanger tube 5, there is minor face at the place at described pore, join with described top fluoroplastics orifice plate 1, described bottom fluoroplastics orifice plate 4 respectively, described minor face and described heat exchanger tube 5 near, fix by frictional force between described minor face and the described heat exchanger tube 5.The top board of tubular type gas-gas heat exchanger of the present utility model, adopt said structure, prevented that on the one hand flue gas from corroding carbon steel orifice plate 2, realized on the other hand the effective sealing between top board pore and the heat exchanger tube 5, avoided simultaneously because inefficacy and the frequent of the sealing device that flue gas causes for the erosion of sealing device.
What need statement is that above-mentioned utility model content and the specific embodiment are intended to prove the practical application of technical scheme that the utility model provides, and should not be construed as the restriction to the utility model protection domain.Those skilled in the art are in spirit of the present utility model and principle, when doing various modifications, being equal to and replacing or improve.Protection domain of the present utility model is as the criterion with appended claims.
Claims (6)
1. the top board of a tubular type gas-gas heat exchanger is characterized in that, described top board comprises top fluoroplastics orifice plate (1), carbon steel orifice plate (2) and bottom fluoroplastics orifice plate (4); Wherein, described top fluoroplastics orifice plate (1) by gravity naturally depend on described carbon steel orifice plate (2) above, described bottom fluoroplastics orifice plate (4) be positioned at described carbon steel orifice plate (2) below; Described top fluoroplastics orifice plate (1), described carbon steel orifice plate (2) and described bottom fluoroplastics orifice plate (4) are fixed between top frame (3) and the wallboard (6).
2. top board according to claim 1, it is characterized in that described top fluoroplastics orifice plate (1), described carbon steel orifice plate (2) and described bottom fluoroplastics orifice plate (4) are connected with the bolt that is fixedly connected as between described top frame (3) and the described wallboard (6).
3. top board according to claim 1 is characterized in that, between described top fluoroplastics orifice plate (1) and the described heat exchanger tube (5) for being fixedly connected with.
4. top board according to claim 3 is characterized in that, is fixedly connected as welding between described top fluoroplastics orifice plate (1) and the described heat exchanger tube (5).
5. top board according to claim 2 is characterized in that, the described pore internal diameter size of described bottom fluoroplastics orifice plate (4) is less than the outside dimension of described heat exchanger tube (5).
6. arbitrary described top board according to claim 1 ~ 5, it is characterized in that, described top board has the pore that matches with heat exchanger tube (5), there is minor face at the place at described pore, join with described top fluoroplastics orifice plate (1), described bottom fluoroplastics orifice plate (4) respectively, described minor face and described heat exchanger tube (5) near, fix by frictional force between described minor face and the described heat exchanger tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220456516.3U CN202853459U (en) | 2012-09-07 | 2012-09-07 | Top plate of tubular gas-to-gas heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220456516.3U CN202853459U (en) | 2012-09-07 | 2012-09-07 | Top plate of tubular gas-to-gas heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202853459U true CN202853459U (en) | 2013-04-03 |
Family
ID=47984645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220456516.3U Expired - Lifetime CN202853459U (en) | 2012-09-07 | 2012-09-07 | Top plate of tubular gas-to-gas heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202853459U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486741A (en) * | 2020-04-22 | 2020-08-04 | 御隆膜科技南通有限公司 | Connecting structure of prefabricated joint type fluoroplastic heat exchange tube and tube plate and installation method thereof |
-
2012
- 2012-09-07 CN CN201220456516.3U patent/CN202853459U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486741A (en) * | 2020-04-22 | 2020-08-04 | 御隆膜科技南通有限公司 | Connecting structure of prefabricated joint type fluoroplastic heat exchange tube and tube plate and installation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |