CN202868656U - Reusable device of super low-temperature flue gas and waste heat of utility boiler - Google Patents
Reusable device of super low-temperature flue gas and waste heat of utility boiler Download PDFInfo
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- CN202868656U CN202868656U CN2012205769878U CN201220576987U CN202868656U CN 202868656 U CN202868656 U CN 202868656U CN 2012205769878 U CN2012205769878 U CN 2012205769878U CN 201220576987 U CN201220576987 U CN 201220576987U CN 202868656 U CN202868656 U CN 202868656U
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- flue gas
- boiler
- heat exchanger
- utility
- waste heat
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- 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
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Abstract
The utility model relates to a reusable device of super low-temperature flue gas and waste heat of an utility boiler. The reusable device of the super low-temperature flue gas and waste heat of the utility boiler comprises a flue gas heat exchanger, a positioning piece, a water distribution pipe, a spray pipe, pipelines, a boiler feed water preheater, a dust remover, an air preheater, a boiler, a hearth, a superheater, an economizer, a desulfurizing tower and a chimney. The reusable device of the super low-temperature flue gas and waste heat of the utility boiler is characterized in that the flue gas heat exchanger is connected with the boiler feed water preheater. The flue gas heat exchanger is respectively connected with the dust remover and the desulfurizing tower. The dust remover is connected with the air preheater. The superheater and the economizer are arranged inside the hearth which is formed by the boiler. The positioning piece is arranged inside the flue gas heat exchanger. The water distribution pipe is arranged under the positioning piece. The spray pipe is arranged below the water distribution pipe. One end of the spray pipe is connected with the water distribution pipe, and the other end of the spray pipe is arranged in a gap between the pipelines. The reusable device of the super low-temperature flue gas and waste heat of the utility boiler utilizes the technical improvement of heat exchanging materials. The flue gas heat exchanger uses modified fluoroplastics (polytetrafluoroethylene plus (PTFE+) ) as main materials of heat exchanger, so that dew point corrosion is avoided, service life of the device is prolonged and energy conservation and beneficiation are achieved in a real sense.
Description
Technical field
The utility model relates to a kind of station boiler utmost point low-temperature flue gas waste heat reusing appts.
Background technology
Discharge smoke temperature of power station boiler for a long time can't dive in the prior art, and the exhaust gas temperature design load is at 125-150 ℃, and the difference actual exhaust gas temperature that the collaborative impact that is subject to flue gas acid dew point and dust stratification merges service condition often is higher than design load 20-50 ℃.Power plant soot is in combustion process, sulphur powder in the fuel is transformed into S02, wherein a part is oxidized to again SO3, the SO3 H2S04 solution that becomes soluble in water, be down to the salt acid dew point when following when any flue surface temperature, very serious corrosion will occur, the salt acid dew point is near the dew point of water and sulfurous acid, even the chloride of very small amount of sulphur powder and other condensations acid combination all can produce serious etching problem, metal heat exchanger can't solve the flue gas corrosion problem.Equipment investment reclaim to need 2-3, without the investment return phase, does not have investment value at 2-3 the heat exchanger tube life-span under the oepration at full load.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of station boiler utmost point low-temperature flue gas waste heat reusing appts is provided, the technical scheme that its technical problem that solves the utility model adopts is: structure of the present utility model comprises flue gas heat-exchange unit, keeper, water distributor, sparge pipe, pipeline, feedwater preheater, deduster, air preheater, boiler, burner hearth, superheater, economizer, desulfurizing tower, chimney, it is characterized in that flue gas heat-exchange unit is connected with feedwater preheater, flue gas heat-exchange unit is arranged between deduster and the desulfurizing tower, flue gas heat-exchange unit is connected with desulfurizing tower with deduster respectively, deduster is connected with air preheater, air preheater is connected with boiler, be provided with superheater and economizer in the burner hearth that is formed by boiler, be provided with keeper in the flue gas heat-exchange unit, the keeper below arranges water distributor, be provided with sparge pipe below the water distributor, sparge pipe one end is connected with water distributor, the sparge pipe other end is arranged on the gap between the pipeline, is provided with aperture on the sparge pipe.
Operation principle and operation instruction: the utility model passes through the internal system water circulation system with the heat transferred boiler feedwater in the flue gas; Can increase power station overall efficiency 1.5%, reduce coal-fired consumption; Can also in acid dew point and following temperature environment, move.Smoke gas afterheat heat exchanger adopts modification fluoroplastics (PTFE
+) make, corrosion-resistant, have the non-sticky surface effect, thereby easy to clean, antifouling capability is strong.Fly ash granule, condensation acid can at the heat exchanger tube surface scale, in order to remove these deposits, need the gas cooler of installation period to carry out the low-pressure water cleaning.The water purging system is positioned at the upstream (flow of flue gas direction) of heat exchanger, is comprised of sparge pipe and water distributor.Sparge pipe is positioned at the alignment layers below, and flushing is carried out from top to bottom.Aperture on the sparge pipe can guarantee rinse water uniformity in whole heat exchange module.Can guarantee simultaneously that so also locator does not stop up, pipe has the space of free-extension and does not get clogged.A hole water spray is arranged, to clean this zone on the every sparge pipe.System can control automatically by DCS, or selects a time sequencing, or automatically controls according to the leaving water temperature of cooler.But the operation of purging system automatic or manual, each module scavenging period is about 4 minutes most, cleans every day twice.The clean cloth water pipe of each module is supplied water by the fresh water (FW) loop.Cleaned a module, next module capable of washing.Each about 4.5m of water consumption that cleans each module
3In order to clean each gas cooler heat exchange module, each module has independently rinse water dish valve.Can examine by the DCS system the separately cleaning operation interval of preliminary election.If signal shows " cleaning procedure carry out in ", next rinse water dish valve enters boot sequence.The group control down periods, final step must recover internal memory, so that program is proceeded next step after again activating.
The beneficial effects of the utility model are that the utility model is taked the innovation of heat exchange material technology, flue gas heat-exchange unit employing modification fluoroplastics (PTFE
+) be heat exchanger master material, avoided acid dew piont corrosion, prolonged the service life of equipment, truly realize energy efficiency.Modification fluoroplastics (PTFE
+) material, have excellent corrosion resistance, strengthened thermal conductivity, improved wearability, without specific (special) requirements, corrosion, applicability are not strong to flue gas composition, wall temperature, acid dew point.Recyclable 170-75 ℃ fume afterheat is far longer than " low-level (stack-gas) economizer " recyclable 170-120 ℃ fume afterheat.Grow to 15 years service life, the investment repayment phase is as short as 3-5, and material self has the automatically cleaning characteristic, anti-is stained with glutinously, and easy cleaning, antifouling capability are strong.Stress crack can not occur in tubing, and without risk of leakage, rate of return on investment is high, system's mature and reliable, long service life.Generally be applicable to conventional power generation usage factory, especially the high fire coal of sulfur content.
Description of drawings
Fig. 1: the utility model example structure schematic diagram.
Fig. 2: the utility model embodiment fume afterheat reusing system structural representation.
Among the figure: flue gas heat-exchange unit 1, keeper 2, water distributor 3, sparge pipe 4, pipeline 5, feedwater preheater 6, deduster 7, air preheater 8, boiler 9, burner hearth 10, superheater 11, economizer 12, desulfurizing tower 13, chimney 14.
The specific embodiment
With reference to description of drawings the utility model is done following concrete detailed description.As shown in drawings, structure of the present utility model comprises flue gas heat-exchange unit 1, keeper 2, water distributor 3, sparge pipe 4, pipeline 5, feedwater preheater 6, deduster 7, air preheater 8, boiler 9, burner hearth 10, superheater 11, economizer 12, desulfurizing tower 13, chimney 14, it is characterized in that flue gas heat-exchange unit 1 is connected with feedwater preheater 6, flue gas heat-exchange unit 1 is arranged between deduster 7 and the desulfurizing tower 13, flue gas heat-exchange unit 1 is connected with desulfurizing tower with deduster 7 respectively and is connected, deduster 7 is connected with air preheater 8, air preheater 8 is connected with boiler 9, be provided with superheater 11 and economizer 12 in the burner hearth 10 that is formed by boiler 9, be provided with keeper 2 in the flue gas heat-exchange unit 1, keeper 2 belows arrange water distributor 3, be provided with sparge pipe 4 below the water distributor 3, sparge pipe 4 one ends are connected with water distributor 3, sparge pipe 4 other ends are arranged on the gap between the pipeline 5, are provided with aperture on the sparge pipe 4.
Embodiment recited above is described preferred embodiment of the present utility model; be not that design of the present utility model and scope are limited; under the prerequisite that does not break away from the utility model design concept; common engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.
Claims (1)
1. station boiler utmost point low-temperature flue gas waste heat reusing appts, comprise flue gas heat-exchange unit (1), keeper (2), water distributor (3), sparge pipe (4), pipeline (5), feedwater preheater (6), deduster (7), air preheater (8), boiler (9), burner hearth (10), superheater (11), economizer (12), desulfurizing tower (13), chimney (14), it is characterized in that flue gas heat-exchange unit (1) is connected with feedwater preheater (6), flue gas heat-exchange unit (1) is arranged between deduster (7) and the desulfurizing tower (13), flue gas heat-exchange unit (1) is connected 13 with deduster (7) with desulfurizing tower respectively) be connected, deduster (7) is connected with air preheater (8), air preheater (8) is connected with boiler (9), be provided with superheater (11) and economizer (12) in the burner hearth (10) that is formed by boiler (9), be provided with keeper (2) in the flue gas heat-exchange unit (1), keeper (2) below arranges water distributor (3), be provided with sparge pipe (4) below the water distributor (3), sparge pipe (4) one ends are connected with water distributor (3), sparge pipe (4) other end is arranged on the gap between the pipeline (5), and sparge pipe is provided with aperture on (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205769878U CN202868656U (en) | 2012-10-31 | 2012-10-31 | Reusable device of super low-temperature flue gas and waste heat of utility boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205769878U CN202868656U (en) | 2012-10-31 | 2012-10-31 | Reusable device of super low-temperature flue gas and waste heat of utility boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202868656U true CN202868656U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205769878U Expired - Fee Related CN202868656U (en) | 2012-10-31 | 2012-10-31 | Reusable device of super low-temperature flue gas and waste heat of utility boiler |
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| Country | Link |
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| CN (1) | CN202868656U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203154A (en) * | 2013-04-24 | 2013-07-17 | 北京新世翼节能环保科技股份有限公司 | Water-cooled tube type condensate dust collector |
| CN104566427A (en) * | 2014-03-27 | 2015-04-29 | 黑龙江国德节能服务有限公司 | Gas boiler smoke treatment system and method |
| CN105091613A (en) * | 2014-12-02 | 2015-11-25 | 芜湖三峰节能设备有限公司 | Flue gas sensible heat recovery device used for smelting flue gas acid-making device |
-
2012
- 2012-10-31 CN CN2012205769878U patent/CN202868656U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203154A (en) * | 2013-04-24 | 2013-07-17 | 北京新世翼节能环保科技股份有限公司 | Water-cooled tube type condensate dust collector |
| CN103203154B (en) * | 2013-04-24 | 2015-01-21 | 北京新世翼节能环保科技股份有限公司 | Water-cooled tube type condensate dust collector |
| CN104566427A (en) * | 2014-03-27 | 2015-04-29 | 黑龙江国德节能服务有限公司 | Gas boiler smoke treatment system and method |
| CN104566427B (en) * | 2014-03-27 | 2017-03-01 | 黑龙江国德节能服务有限公司 | Gas fired-boiler smoke gas treatment system and smoke treating method |
| CN105091613A (en) * | 2014-12-02 | 2015-11-25 | 芜湖三峰节能设备有限公司 | Flue gas sensible heat recovery device used for smelting flue gas acid-making device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing FW M & E Engineering Tech Co.,Ltd. Document name: Notification to Pay the Fees |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20191031 |