CN204786501U - Flue gas hot swap structure - Google Patents
Flue gas hot swap structure Download PDFInfo
- Publication number
- CN204786501U CN204786501U CN201520406209.8U CN201520406209U CN204786501U CN 204786501 U CN204786501 U CN 204786501U CN 201520406209 U CN201520406209 U CN 201520406209U CN 204786501 U CN204786501 U CN 204786501U
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- flue gas
- temperature section
- exchange module
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 46
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 5
- 230000023556 desulfurization Effects 0.000 claims abstract description 4
- 239000003517 fume Substances 0.000 claims abstract description 4
- 229920002313 fluoropolymer Polymers 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract 1
- 239000012717 electrostatic precipitator Substances 0.000 abstract 1
- 239000002918 waste heat Substances 0.000 abstract 1
- 235000019504 cigarettes Nutrition 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a flue gas hot swap structure belongs to waste heat recovery and utilizes technical field. Including the hot switching module of high temperature section, the medium temperature hot switching module of section and the hot switching module of low temperature section: flue gas heat exchange structure sets up between air heater and the electrostatic precipitator or between desulfurization, wet -type electric precipitation system and chimney, the hot switching module of high temperature section sets up in flue gas high temperature section, the hot switching module of low temperature section sets up in flue gas low temperature section. The utility model discloses a novel heat exchange structure can reach the fume emission level of environmental protection more, reduces economic cost simultaneously, is fit for popularizing and applying in china's coal fired power plant.
Description
Technical field
The utility model relates to a kind of flue gas heat exchange mechanism, belongs to heat recovery technical field.
Background technology
Along with the enforcement of " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011), the dust emission mass concentration control criterion of China's fired power generating unit reduces to 30mg/Nm
3, key area 20mg/Nm
3, even 5mg/Nm
3.More and more high to the requirement of cleaner, the cigarette temperature that the reduction of flue gas heat-exchange device enters electric cleaner is installed additional before electric precipitation in increasing power plant at present, and before chimney, install the cigarette temperature that the rising of flue gas heat-exchange device enters chimney additional, reach the Air Pollutant Emission requirement of new environmental protection.Due to sulfureous in flue gas element, too low cigarette temperature can produce corrosiveness to flue gas heat-exchange device itself, affects the service life of flue gas heat-exchange device.Therefore, flue gas heat-exchange device need adopt special resistant material.Traditional at present flue gas heat-exchange device adopt all with ND steel and above equivalent material or all with fluoroplastics material as heat-exchange tube, the cigarette temperature that the former enters electric cleaner is higher, affects dust collection efficiency, and costly, financial cost is higher for latter material.Therefore, the flue gas heat-exchange device of simple a kind of material is difficult to reach not only environmental protection but also economic requirement.
Based on this, make subject application.
Utility model content
Technical problem to be solved in the utility model is: the deficiency for existing flue gas hot swapping provides a kind of not only environmental protection but also economic flue gas heat exchange structure.
The technical solution adopted in the utility model is:
A kind of flue gas heat exchange mechanism, comprises high temperature section heat exchange module, middle-temperature section heat exchange module and low-temperature zone heat exchange module, described flue gas heat exchange structure is arranged between air preheater and electric cleaner or in desulfurization, between Wet-type electric dust removal system and chimney, described high temperature section heat exchange module is arranged on fume high-temperature section, described low-temperature zone heat exchange module is arranged on flue gas low-temperature section, described middle-temperature section heat exchange module is arranged between high temperature section heat exchange module and low-temperature zone heat exchange module, described high temperature section heat exchange module and middle-temperature section heat exchange module include the base tube of ND steel and above equivalent material and the pipe of double H-shaped fins module of fin formation, heat transferring medium water is passed in described base tube, described fin is parallel to the outer surface that high-temperature flue gas ventilation direction symmetry is installed in described adjacent two foundation pipes, described low-temperature zone heat exchange module comprises the pipe of fluoroplastics material, heat transferring medium water is passed in described pipe.
Further, as preferably:
Described high temperature section heat exchange module, middle-temperature section heat exchange module and low-temperature zone heat exchange module are connected by pipe.
Described pipe of double H-shaped fins module and fluoroplastics pipe are fixed on by tube sheet in the exhaust gases passes in housing.
Described fin is fixed by welding on base tube.
All base tubes of described pipe of double H-shaped fins module are connected by bend pipe.
Described fluoroplastics pipe connects into fluoroplastics tube bank by honeycomb tubesheet.
Described fluoroplastics tube bank is by liaison tube and flange series connection.
The heat-transfer pipe of unlike material is selected in flue gas heat exchange in the utility model in different temperatures, the temperature entering electric cleaner can be made to be low to moderate 80 DEG C, thus the exhaust gas volumn making to enter electric precipitation reduces, fly ash resistivity reduces, electric field breakdown voltage rise, and then improve efficiency of dust collection.
In the utility model, the heat-transfer pipe of unlike material is selected in flue gas heat exchange in different temperatures, effectively can reduce the impact of cold end corrosion on flue gas heat-exchange device, thus improve the service life of flue gas heat-exchange device, and simultaneously also can cost saving, reduce financial cost.
In sum, the flue gas heat exchange structure that the utility model adopts has outstanding advantage, can be used as the first-selected technique of Environmental-protection coal-fired power plant, is adapted at applying in coal-burning power plant of China.
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is flue gas heat-exchange system figure;
Fig. 2 is flue gas heat exchange structure schematic diagram;
Fig. 3 is base tube and rib structure schematic diagram.
Number in the figure: 1-flue gas heat exchange structure, 2-water circulation system, 3-electric dust removing system, 4-desulfurization, Wet-type electric dust removal system.
Detailed description of the invention
Embodiment 1
A kind of flue gas heat exchange mechanism of the present embodiment, composition graphs 1, Fig. 2 and Fig. 3, comprise high temperature section heat exchange module, middle-temperature section heat exchange module and low-temperature zone heat exchange module, described flue gas heat exchange structure 1 is arranged between air preheater 5 and electric cleaner 3 or in desulfurization, between Wet-type electric dust removal system 4 and chimney 6, high temperature section heat exchange module 7 is arranged on fume high-temperature section, low-temperature zone heat exchange module 9 is arranged on flue gas low-temperature section, middle-temperature section heat exchange module 8 is arranged between high temperature section heat exchange module 7 and low-temperature zone heat exchange module 9, described high temperature section heat exchange module 7, middle-temperature section heat exchange module 8 and low-temperature zone heat exchange module 9 are connected by pipe 12, high temperature section heat exchange module 7 and middle-temperature section heat exchange module 8 include the base tube 20 of ND steel and above equivalent material and the pipe of double H-shaped fins module 10 of fin 21 formation, heat transferring medium water is passed in base tube 20, fin 21 is parallel to the outer surface that high-temperature flue gas ventilation direction is symmetrically welded at described adjacent two foundation pipes 20, specifically as shown in Figure 3, all base tubes of pipe of double H-shaped fins module 10 are connected by bend pipe 15, low-temperature zone heat exchange module 9 comprises the pipe 11 of fluoroplastics material, pipe of double H-shaped fins module 10 and fluoroplastics pipe 11 are fixed in the exhaust gases passes in housing 14 by tube sheet 13, fluoroplastics pipe 11 connects into fluoroplastics tube bank 17 by honeycomb tubesheet 16, fluoroplastics tube bank 17 is connected by liaison tube 18 and flange 19, heat transferring medium water is passed in fluoroplastics pipe 11.
As shown in Figure 2, flue gas is successively through high temperature section heat exchange module, middle-temperature section heat exchange module, low-temperature zone heat exchange module or successively through low-temperature zone heat exchange module, middle-temperature section heat exchange module, high temperature section heat exchange module, this arrangement effectively can reduce the corrosiveness of low-temperature flue gas to flue gas heat-exchange device itself, reduces financial cost simultaneously.
As shown in Figure 2, low-temperature zone heat exchange module have employed fluoroplastics material, fluoroplastics corrosion resistance is strong, the cigarette temperature entering electric precipitation can be made lower, the exhaust gas volumn making to enter electric cleaner reduces, fly ash resistivity reduces, electric field breakdown voltage rise, for electric precipitation high-efficient purification creates good condition.
Above content is the further description done provided technical scheme in conjunction with preferred embodiment of the present utility model; can not assert that the utility model is specifically implemented to be confined to these explanations above-mentioned; for the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.
Claims (7)
1. a flue gas heat exchange mechanism, is characterized in that: comprise high temperature section heat exchange module, middle-temperature section heat exchange module and low-temperature zone heat exchange module, described flue gas heat exchange structure is arranged between air preheater and electric cleaner or in desulfurization, between Wet-type electric dust removal system and chimney, described high temperature section heat exchange module is arranged on fume high-temperature section, described low-temperature zone heat exchange module is arranged on flue gas low-temperature section, described middle-temperature section heat exchange module is arranged between high temperature section heat exchange module and low-temperature zone heat exchange module, described high temperature section heat exchange module and middle-temperature section heat exchange module include the base tube of ND steel and above equivalent material and the pipe of double H-shaped fins module of fin formation, described fin is parallel to the outer surface that high-temperature flue gas ventilation direction symmetry is installed in described adjacent two foundation pipes, described low-temperature zone heat exchange module comprises the pipe of fluoroplastics material.
2. a kind of flue gas heat exchange mechanism as claimed in claim 1, is characterized in that: described high temperature section heat exchange module, middle-temperature section heat exchange module and low-temperature zone heat exchange module are connected by pipe.
3. a kind of flue gas heat exchange mechanism as claimed in claim 1, is characterized in that: described pipe of double H-shaped fins module and fluoroplastics pipe are fixed on by tube sheet in the exhaust gases passes in housing.
4. a kind of flue gas heat exchange mechanism as claimed in claim 1, is characterized in that: described fin is fixed by welding on base tube.
5. a kind of flue gas heat exchange mechanism as claimed in claim 1, is characterized in that: all base tubes of described pipe of double H-shaped fins module are connected by bend pipe.
6. a kind of flue gas heat exchange mechanism as claimed in claim 1, is characterized in that: described fluoroplastics pipe connects into fluoroplastics tube bank by honeycomb tubesheet.
7. a kind of flue gas heat exchange mechanism as claimed in claim 1, is characterized in that: described fluoroplastics tube bank is by liaison tube and flange series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520406209.8U CN204786501U (en) | 2015-06-12 | 2015-06-12 | Flue gas hot swap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520406209.8U CN204786501U (en) | 2015-06-12 | 2015-06-12 | Flue gas hot swap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204786501U true CN204786501U (en) | 2015-11-18 |
Family
ID=54526547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520406209.8U Expired - Fee Related CN204786501U (en) | 2015-06-12 | 2015-06-12 | Flue gas hot swap structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204786501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220002A (en) * | 2018-11-26 | 2020-06-02 | 宁波方太厨具有限公司 | Heat exchanger and water heater comprising same |
-
2015
- 2015-06-12 CN CN201520406209.8U patent/CN204786501U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220002A (en) * | 2018-11-26 | 2020-06-02 | 宁波方太厨具有限公司 | Heat exchanger and water heater comprising same |
| CN111220002B (en) * | 2018-11-26 | 2021-11-12 | 宁波方太厨具有限公司 | Heat exchanger and water heater comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |