CN101354102A - Expansion node - Google Patents
Expansion node Download PDFInfo
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- CN101354102A CN101354102A CNA2008100612727A CN200810061272A CN101354102A CN 101354102 A CN101354102 A CN 101354102A CN A2008100612727 A CNA2008100612727 A CN A2008100612727A CN 200810061272 A CN200810061272 A CN 200810061272A CN 101354102 A CN101354102 A CN 101354102A
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- expansion joint
- breathing zone
- adopts
- honeycomb duct
- expansion
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Abstract
The invention discloses an expansion joint which comprises a frame. The upper part of the frame is provided with a top expansion area, while the lower part thereof is provided with a bottom expansion area opened with a diversion trench, and a honeycomb duct is positioned in the diversion trench. The frame adopts carbon steel materials, the top expansion area adopts nonmetal fabric materials, and the bottom expansion area and the honeycomb duct adopt alloy materials. Different materials are adopted at different areas of the expansion joint and the angle and size of each part are adjusted reasonably, thus being capable of avoiding water accumulation at the bottom of the expansion joint, the corrosion and perforation of expansion material at the bottom as well as the deposition of solid matters in condensate; having the function of corrosion resistance and leakage resistance; prolonging the service life of the expansion joint and improving the reliability of the device.
Description
[technical field]
The present invention relates to the system that removes of sulfur dioxide in the coal-fired power station boiler tail flue gas, promptly the limestone/gypsum wet method fume desulfurizing system specifically is the improvement to expansion joint in this system.
[technical background]
China is that a few coal is one of country of main energy sources in the world, coal in the production of the primary energy of China and consumption ratio always more than 70%, the coal-fired dioxide emissions that produces has formed huge environmental pollution, and it is imperative fundamentally to administer the environmental pollution that dioxide emissions causes.
The limestone/gypsum wet fuel gas desulfurizing technology is that various countries, the world today use at most and the most ripe technology, also is domestic heat-engine plant desulfurized leading technology.The main flow process of this technology is that the flue gas of boiler enters flue gas desulfurization (FGD) system from the flue interface of induced draught fan outlet side.Before entering desulfuration absorbing tower, flue gas boosts through booster fan, then by flue gas one flue gas heater (GGH), with the heat delivered of flue gas flue gas to the absorption tower outlet, the absorption tower entrance flue gas temperature is reduced, help the absorption tower safe operation, the cleaning flue gases of absorption tower outlet simultaneously is then by the GGH heat temperature raising, and flue-gas temperature raises, and helps the Flue Gas Diffusion discharging., can make chimney outlet reach better diffusion conditions and avoid flue gas to form white mist generally about 80 ℃ through flue-gas temperature after the GGH heater heats.The booster fan of establishing before the GGH, in order to overcome the resistance of desulphurization system, the cleaning flue gases after the heating enters chimney by the force feed of booster fan.When not establishing GGH heater heats system, flue-gas temperature is generally at 40～50 ℃.
After power plant's wet desulphurization, enter from absorption tower outlet that the flue-gas temperature of the bypass flue before clean flue gas flue and the chimney inlet is lower, water content increases.After flue gas after the desulfurization was removed droplet through demister, the bypass flue before clean flue gas flue and chimney inlet entered atmosphere by chimney; When system does not establish GGH, from the clean flue gas that desulfurizing tower comes out, contain the sulfur trioxide gas of a large amount of water vapors and trace, behind demister, still contain a spot of drop.After the flue gas of low temperature entered bypass flue before clean flue gas flue and the chimney inlet, along with the reduction of cigarette temperature, water vapor can dewfall become drop, with sulfur trioxide in smoke gas chemical combination, forms the sulfuric acid liquid film.
Flue gas is through after the desulfurization, though the content of sulfur in smoke significantly reduce,, the method for washing is to removing a spot of sulfur trioxide effect and bad in the flue gas.Because through wet desulphurization, smoke moisture increases, temperature reduces, flue gas after remaining sulfur trioxide dissolves in the flue gas, forms the very strong dilute sulfuric acid solution of corrosivity very easily in the inwall dewfall of chimney.On the bypass flue before clean flue gas flue and chimney inlet expansion joint must be set, simultaneously, the bottom of expansion joint is in the working environment of the very strong dilute sulfuric acid solution of corrosivity.
Present expansion joint all adopts nonmetallic material, and its structure is continued to use old-fashioned mentality of designing basically with design, do not consider the wet environment of inwall meeting dewfall, from the situation that reality is used, there are the following problems: 1) traditional non-metal expansion joint is short working life; 2) there is the run, drip, leak phenomenon in traditional non-metal expansion joint, run, emit flue gas and drip, the cold draining lime set causes equipment, surrounding environment and the personnel of patrolling and examining of periphery and has a strong impact on; 3) reduced the reliability of system equipment.
[summary of the invention]
Purpose of the present invention is exactly to propose a kind of expansion joint in order to solve problems of the prior art, can corrosion protection, anti-leak, and have longer working life.
For achieving the above object, patent of the present invention has proposed a kind of expansion joint, comprise framework, the top of described framework is provided with the top breathing zone, and the bottom is provided with the bottom breathing zone, have guiding gutter on the breathing zone of bottom, honeycomb duct is set in the guiding gutter, and framework adopts carbon steel material, and the top breathing zone adopts the non-metallic fabrics material, the bottom breathing zone adopts alloy material, and described honeycomb duct adopts alloy material.
As preferably, described top breathing zone adopts carbon steel bolt and carbon steel press strip to be attached on the framework, and the bottom breathing zone adopts the mode of welding to be attached on the framework.
As preferably, described alloy material is 316 stainless steels or 904 alloys or 926 alloys or C276 alloy.
As preferably, described guiding gutter is arranged on the middle part of bottom breathing zone.
As preferably, the two ends of described bottom breathing zone are lineal shape, and the middle part is an arc section, and the arc section two ends are 77 °-120 ° to the angle α in the center of circle,
As preferably, described angle α is 90 °.
As preferably, the caliber of described honeycomb duct 6 is between DN50-DN150.
As preferably, the caliber of described honeycomb duct 6 is DN80.
The beneficial effect of patent of the present invention: the present invention adopts different materials in the zones of different of expansion joint, and the angle of each parts, size done rationally to adjust, can prevent the generation of expansion joint bottom hydrops, avoid the bottom expanding material not corrode mashed wearing, prevent solid matter deposition in the condensed fluid, function with corrosion protection, anti-leak has prolonged working life of expansion joint, has improved the reliability of equipment.
[description of drawings]
Fig. 1 is the structural representation sectional view of expansion joint of the present invention;
Fig. 2 is the side structure schematic representation of expansion joint of the present invention;
Fig. 3 is the structural representation of honeycomb duct in the expansion joint of the present invention;
Fig. 4 is the alloy and the non-metallic fabrics linkage structure schematic representation of side breathing zone in the expansion joint of the present invention.
[embodiment]
Consult Fig. 1, expansion joint, comprise framework 1, the top of described framework 1 is provided with top breathing zone 2, and the bottom is provided with bottom breathing zone 3, have guiding gutter on the breathing zone 3 of bottom, honeycomb duct 6 is set in the guiding gutter, and framework 1 adopts carbon steel material, and top breathing zone 2 adopts the non-metallic fabrics material, bottom breathing zone 3 adopts alloy material, and described honeycomb duct 6 adopts alloy material.Described top breathing zone 2 adopts carbon steel bolt 4 and carbon steel press strip 5 to be attached on the framework 1, and bottom breathing zone 3 adopts the mode of welding to be attached on the framework 1.Described alloy material is 316 stainless steels or 904 alloys or 926 alloys or C276 alloy.Described guiding gutter is arranged on the middle part of bottom breathing zone 3.The two ends of described bottom breathing zone 3 are lineal shape, and the middle part is an arc section, and the arc section two ends are 77 °-120 ° to the angle α in the center of circle, are generally 90 °.The caliber of described honeycomb duct 6 is generally DN80 between DN50-DN150.
Course of working:
1) zones of different of expansion joint is carried out selection: shown in the accompanying drawing 1, the framework 1 of expansion joint adopts Ordinary Steel; The top breathing zone 2 of expansion joint adopts the non-metallic fabrics material; The bottom breathing zone 3 of expansion joint adopts alloy material (316 stainless steels, 904 alloys, 926 alloys, C276 alloy etc.); The non-metallic fabrics material adopts carbon steel bolt 4 and carbon steel press strip 4 to connect; Honeycomb duct 6 adopts alloy material (316 stainless steels, 904 alloys, 926 alloys, C276 alloy etc.); The side breathing zone is made of jointly alloy and non-metallic fabrics, and non-metallic fabrics material and alloy material adopt alloy press strip 8 and alloy bolt 7 to connect.
2) determine the width of expansion joint:
Shown in the accompanying drawing 1, W1 generally between 200mm-600mm, gets 250mm usually; W2 generally between 100mm-200mm, gets 135mm usually; W3 generally between 15mm-50mm, gets 20mm usually; W4 generally between 40mm-80mm, gets 60mm usually.
3) determine the aperture position of expansion joint bottom guiding gutter:
Shown in the accompanying drawing 1, the aperture position of expansion joint bottom guiding gutter is mainly determined according to making things convenient for honeycomb duct to arrange away always, is generally driveed the middle part at bottom breathing zone 3.
4) determine the angle of expansion joint breathing zone;
Shown in the accompanying drawing 1, the two ends of described bottom breathing zone 3 are lineal shape, and the middle part is an arc section, and the arc section two ends are 77 °-120 ° to the angle α in the center of circle, are generally 90 °.
5) determine guiding gutter bottom, expansion joint bottom honeycomb duct caliber;
Shown in the accompanying drawing 3, between the general DN50-DN150 of caliber d of the honeycomb duct 6 of expansion joint bottom, get DN80 usually.
6) determine the Placement of expansion joint side breathing zone non-metallic fabrics and alloy.
Shown in the accompanying drawing 4, expansion joint side breathing zone comprises non-metallic fabrics and alloy, adopts alloy press strip 8 and alloy bolt 7 to connect between described non-metallic fabrics and the alloy.
The foregoing description is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (8)
1. expansion joint, it is characterized in that: comprise framework (1), the top of described framework (1) is provided with top breathing zone (2), the bottom is provided with bottom breathing zone (3), and the bottom breathing zone has guiding gutter on (3), and honeycomb duct (6) is set in the guiding gutter, framework (1) adopts carbon steel material, top breathing zone (2) adopts the non-metallic fabrics material, and bottom breathing zone (3) adopts alloy material, and described honeycomb duct (6) adopts alloy material.
2. a kind of expansion joint as claimed in claim 1 is characterized in that: described top breathing zone (2) adopts carbon steel bolt (4) and carbon steel press strip (5) to be attached on the framework (1), and bottom breathing zone (3) adopts the mode of welding to be attached on the framework (1).
3. a kind of expansion joint as claimed in claim 2 is characterized in that: described alloy material is 316 stainless steels or 904 alloys or 926 alloys or C276 alloy.
4. a kind of expansion joint as claimed in claim 1 is characterized in that: described guiding gutter is arranged on the middle part of bottom breathing zone (3).
5. a kind of expansion joint as claimed in claim 1 is characterized in that: the two ends of described bottom breathing zone (3) are lineal shape, and the middle part is an arc section, and the arc section two ends are 77 °-120 ° to the angle α in the center of circle.
6. a kind of expansion joint as claimed in claim 5 is characterized in that: described angle α is 90 °.
7. a kind of expansion joint as claimed in claim 1 is characterized in that: the caliber of described honeycomb duct (6) is between DN50-DN150.
8. a kind of expansion joint as claimed in claim 7 is characterized in that: the caliber of described honeycomb duct (6) is DN80.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100612727A CN101354102B (en) | 2008-03-20 | 2008-03-20 | Expansion node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100612727A CN101354102B (en) | 2008-03-20 | 2008-03-20 | Expansion node |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101354102A true CN101354102A (en) | 2009-01-28 |
| CN101354102B CN101354102B (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100612727A Active CN101354102B (en) | 2008-03-20 | 2008-03-20 | Expansion node |
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| Country | Link |
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| CN (1) | CN101354102B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620098A (en) * | 2012-03-31 | 2012-08-01 | 南通三创机械制造有限公司 | Novel fiber expansion joint |
| CN102913710A (en) * | 2012-10-31 | 2013-02-06 | 上海迪夫格环境科技有限公司 | Chimney expansion joint |
| CN110314453A (en) * | 2018-03-29 | 2019-10-11 | 中国电力工程顾问集团华北电力设计院有限公司 | Drop collects the compensator of discharge after wet desulphurization |
| CN114593302A (en) * | 2022-03-29 | 2022-06-07 | 诸暨市沣泽动力机械有限公司 | Nonmetal expansion joint capable of realizing double-layer drainage |
-
2008
- 2008-03-20 CN CN2008100612727A patent/CN101354102B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620098A (en) * | 2012-03-31 | 2012-08-01 | 南通三创机械制造有限公司 | Novel fiber expansion joint |
| CN102913710A (en) * | 2012-10-31 | 2013-02-06 | 上海迪夫格环境科技有限公司 | Chimney expansion joint |
| CN110314453A (en) * | 2018-03-29 | 2019-10-11 | 中国电力工程顾问集团华北电力设计院有限公司 | Drop collects the compensator of discharge after wet desulphurization |
| CN114593302A (en) * | 2022-03-29 | 2022-06-07 | 诸暨市沣泽动力机械有限公司 | Nonmetal expansion joint capable of realizing double-layer drainage |
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| Publication number | Publication date |
|---|---|
| CN101354102B (en) | 2011-12-07 |
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