CN106369584A - Low-temperature economizer - Google Patents
Low-temperature economizer Download PDFInfo
- Publication number
- CN106369584A CN106369584A CN201610744570.0A CN201610744570A CN106369584A CN 106369584 A CN106369584 A CN 106369584A CN 201610744570 A CN201610744570 A CN 201610744570A CN 106369584 A CN106369584 A CN 106369584A
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- CN
- China
- Prior art keywords
- casing
- heat exchange
- box body
- low
- exchange tube
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a low-temperature economizer which comprises a box body and a snakelike heat exchange pipe. A smoke inlet is formed in the top of the box body. A flow guide groove spirally downward is formed in the inner wall of the box body. The bottom of the box body is connected with a soot collecting bucket. A valve is arranged at the bottom of the soot collecting bucket. A smoke outlet discharging smoke horizontally is formed in the connecting position of the side wall of the box body and the soot collecting bucket. The snakelike heat exchange pipe is distributed in the box body in a zigzag reciprocating manner and is fixed to the box body through a supporting frame. The outer wall of the box body is provided with a shell, wherein a sealed cavity is formed between the shell and the outer wall of the box body. The snakelike heat exchange pipe is provided with a water inlet penetrating out of the side wall of the upper portion of the box body to communicate with the cavity, and a water outlet penetrating out of the side wall of the box body and the side wall of the shell in sequence from the lower portion of the box body. The lower portion of the shell is further provided with a water inlet pipe communicating with the cavity. The low-temperature economizer is simple in structure, high in heat exchange efficiency, long in service life, low in cost, capable of saving energy and environment-friendly.
Description
Technical field
The present invention relates to economizer is and in particular to a kind of low-level (stack-gas) economizer.
Background technology
Flue gas loss is a most important heat loss in boiler operatiopn, typically about 5%～12%, account for boiler heat loss
60%～70%.Install economizer additional in boiler back end ductwork, depth Mist heat recovering can be reached, increase generated energy, fall
Low coal consumption, the purpose saved desulfurization water consume, protect chimney.
Using common light pipe economizer, system complex, due to smoke evacuation in contain a large amount of dust, boiler overload operation
When, flying dust concentration and flue gas flow rate increase, and can produce abrasion to light pipe in high speed is washed away, thus reducing the intensity of tube bank,
Easily cause tube bank leakage accident, bring potential safety hazard.
And the snakelike heat exchange tube of common economizer is very big because of the water side coefficient of heat transfer, bigger than the coefficient of heat transfer of fume side
Many, close to water side temperature, the coolant-temperature gage in snakelike heat exchange tube is relatively low for the tube wall temperature of snakelike heat exchange tube, and therefore snakelike heat exchange tube holds
It is also easy to produce low temperature acid dew piont corrosion, the normal operation of this service life having severely impacted equipment and system.
Content of the invention
The technical problem to be solved is that a kind of structure of offer is simple, heat exchange efficiency is high, long service life, cost
Low, energy-conserving and environment-protective low-level (stack-gas) economizers.
The technical scheme is that a kind of low-level (stack-gas) economizer, including casing with snakelike change
Heat pipe, the top of described casing is provided with smoke inlet, and the inwall of described casing is provided with the guiding gutter of downward spiral, described casing
Bottom is connected with cigarette ash collecting bucket, and the bottom of described cigarette ash collecting bucket is provided with valve, the side wall of described casing and described flue dust
Collection bucket joint is provided with the outlet flue of horizontal smoke, and described snakelike heat exchange tube is in back and forth to be distributed in described casing in a zigzag
Portion is simultaneously fixed with casing by bracing frame, and the outer wall of described casing has formation sealing between a shell and the outer wall of described casing
Cavity, described snakelike heat exchange tube have pass casing upper portion side wall connect described cavity water inlet and from casing
Portion passes the outlet of wall box and housing sidewall successively, and the bottom of described housing is additionally provided with the water inlet connecting described cavity
Pipe.
Preferably, being welded with fin on described snakelike heat exchange tube.
Preferably, described fin is helical fin.
Preferably, described fin is H type fin.
Preferably, the inwall of described housing is provided with heat-insulation layer.
Preferably, wear-preventing paint is coated on described snakelike heat exchange tube.
Preferably, described smoke inlet is in up-small and down-big taper tubular.
The invention has the beneficial effects as follows: operationally, cold water enters cabinet exterior and inner walls from water inlet pipe to the present invention
Between cavity in, flow the water inlet from the snakelike heat exchange tube water inlet by snakelike heat exchange tube flows to snakelike changing from the bottom to top
The outlet of heat pipe, flue gas enters flowing under rear right in casing from smoke inlet and then discharges from outlet flue, is changed by snakelike
Heat pipe is by the heat transfer of flue gas to the water in snakelike heat exchange tube.The cold water entering inside cavity transmits flue gas by wall box
Heat preheated, so from water inlet enter snakelike heat exchange tube coolant-temperature gage will not be too low, such that it is able to improve snakelike changing
The tube wall temperature of heat pipe, prevents cold end corrosion from producing.The guiding gutter downward spiral of cabinet wall, on the one hand can play to flue gas
Guide effect, on the other hand can increase the time of contact of flue gas and wall box, to the pre-heat effect of casing inner cold water more
Good.The flue dust that flue gas drops after heat exchange cooling can fall in cigarette ash collecting bucket from the bottom of casing, and periodically opens valve
Door is cleared up to the flue dust in cigarette ash collecting bucket, it is to avoid soot build-up, in box bottom, results in blockage to outlet flue.
The present invention compared with prior art has the advantage that
1st, the present invention improves the water temperature of snakelike heat exchange tube water inlet, that is, improve the tube wall temperature of snakelike heat exchange tube, solution
Determine the cold end corrosion problem of snakelike heat exchange tube, improve the service life of snakelike heat exchange tube.
2nd, device structure is simple, difficulty of processing is little, and heat exchange efficiency is high, low cost of manufacture.
Brief description
Fig. 1 is the structural representation of the present invention；
In accompanying drawing, the list of parts representated by each label is as follows:
1st, casing, 2, snakelike heat exchange tube, 3, bracing frame, 4, housing, 5, water inlet pipe, 6, fin, 7, cigarette ash collecting bucket, 11,
Smoke inlet, 12, outlet flue, 21, water inlet, 22, outlet, 41, cavity.
Specific embodiment
Below in conjunction with accompanying drawing, the principle of the present invention and feature are described, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
As shown in figure 1, a kind of low-level (stack-gas) economizer, including casing 1 and snakelike heat exchange tube 2, the top of described casing 1 is provided with
Smoke inlet 11, the inwall of described casing 1 is provided with the guiding gutter of downward spiral, and described guiding gutter downward spiral is on the one hand permissible
Play the guide effect to flue gas, on the other hand can increase the time of contact of flue gas and casing 1 side wall, to casing 1 inner cold water
Pre-heat effect more preferable.
Described casing 1 bottom is connected with cigarette ash collecting bucket 7, and the bottom of described cigarette ash collecting bucket 7 is provided with valve, flue gas warp
The flue dust dropping after crossing heat exchange cooling can fall in cigarette ash collecting bucket 7 from the bottom of casing 1, and periodically opens valve to flue dust
Flue dust in collection bucket 7 is cleared up, it is to avoid soot build-up, in casing 1 bottom, results in blockage to outlet flue 12.
The side wall of described casing 1 and described cigarette ash collecting bucket 7 joint are provided with the outlet flue 12 of horizontal smoke, described Serpentiss
Shape heat exchanger tube 2 is back and forth distributed in described casing 1 inside and is fixed with casing 1 by bracing frame 3 in zigzag, described casing 1
Outer wall has the cavity 41 forming sealing between a shell and the outer wall of described casing 1, and described snakelike heat exchange tube 2 has and passes case
The upper portion side wall of body 1 connects the water inlet 21 of described cavity 41 and passes casing 1 side wall and housing successively from the bottom of casing 1
The outlet 22 of 4 side walls, the bottom of described housing 4 is additionally provided with the water inlet pipe 5 connecting described cavity 41.
It is welded with fin 6 on described snakelike heat exchange tube 2.The heat exchange efficiency of snakelike heat exchange tube 2 can be increased, preferably,
Described fin 6 is set to helical fin it is ensured that bigger with the area of smoke contacts.Described fin 6 may be arranged as H type wing
Piece, the area of H type fin opposed helical fin is less, but is not easy dust stratification.
The inwall of described housing 4 is provided with heat-insulation layer, can effectively place heat and leak.
Coat wear-preventing paint on described snakelike heat exchange tube 2, can effectively reduce the abrasion of snakelike heat exchange tube 2, improve snakelike
Heat exchanger tube 2 intensity.
Described smoke inlet 11 is in up-small and down-big taper tubular, the flowing speed after being entered in casing 1 with reducing smoke
Degree, makes flue gas longer with the time of contact of casing 1 inwall and snakelike heat exchange tube 2, heat exchange efficiency is higher.
Operationally, cold water enters in the cavity 41 between casing 1 outer wall and housing 4 inwall the present invention from water inlet pipe 5, by
Down to the upper flowing water inlet 21 from snakelike heat exchange tube 2 water inlet 21 by snakelike heat exchange tube 2 flows to going out of snakelike heat exchange tube 2
The mouth of a river 22, flue gas enters flowing under rear right in casing 1 from smoke inlet 11 and then discharges from outlet flue 12, by snakelike heat exchange
Pipe 2 is by the heat transfer of flue gas to the water in snakelike heat exchange tube 2.Enter the cold water within cavity 41 and pass through casing 1 side wall transmission
The heat of flue gas is preheated, so will not be too low from the coolant-temperature gage of water inlet 21 entrance snakelike heat exchange tube 2, such that it is able to improve
The tube wall temperature of snakelike heat exchange tube 2, prevents cold end corrosion from producing.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of low-level (stack-gas) economizer is it is characterised in that include casing (1) and snakelike heat exchange tube (2), the top of described casing (1)
It is provided with smoke inlet (11), the inwall of described casing (1) is provided with the guiding gutter of downward spiral, and described casing (1) bottom connects
There is cigarette ash collecting bucket (7), the bottom of described cigarette ash collecting bucket (7) is provided with valve, the side wall of described casing (1) and described flue dust
Collection bucket (7) joint is provided with the outlet flue (12) of horizontal smoke, and described snakelike heat exchange tube (2) is in back and forth to be distributed in a zigzag
Described casing (1) is internal and passes through bracing frame (3) and casing (1) fixation, the outer wall of described casing (1) have a shell with described
Form the cavity (41) of sealing, described snakelike heat exchange tube (2) has the upper side passing casing (1) between the outer wall of casing (1)
Wall connects the water inlet (21) of described cavity (41) and passes casing (1) side wall and housing (4) successively from the bottom of casing (1)
The outlet (22) of side wall, the bottom of described housing (4) is additionally provided with the water inlet pipe (5) connecting described cavity (41).
2. low-level (stack-gas) economizer according to claim 1 is it is characterised in that be welded with fin on described snakelike heat exchange tube (2)
(6).
3. low-level (stack-gas) economizer according to claim 2 is it is characterised in that described fin (6) is helical fin.
4. low-level (stack-gas) economizer according to claim 2 is it is characterised in that described fin (6) is H type fin.
5. low-level (stack-gas) economizer as claimed in any of claims 1 to 4 is it is characterised in that the inwall of described housing (4)
It is provided with heat-insulation layer.
6. low-level (stack-gas) economizer as claimed in any of claims 1 to 4 is it is characterised in that described snakelike heat exchange tube (2)
Upper coating wear-preventing paint.
7. low-level (stack-gas) economizer as claimed in any of claims 1 to 4 is it is characterised in that described smoke inlet (11) is in
Up-small and down-big taper tubular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744570.0A CN106369584A (en) | 2016-08-28 | 2016-08-28 | Low-temperature economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744570.0A CN106369584A (en) | 2016-08-28 | 2016-08-28 | Low-temperature economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106369584A true CN106369584A (en) | 2017-02-01 |
Family
ID=57903756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610744570.0A Pending CN106369584A (en) | 2016-08-28 | 2016-08-28 | Low-temperature economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106369584A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1599605A (en) * | 1977-03-22 | 1981-10-07 | Indukal Aps | Fire-tube boiler having an economizer |
| CN1609542A (en) * | 2004-11-03 | 2005-04-27 | 广西壮族自治区桂林化工机械厂 | Jacketed striated pipe deflection rod heat exchanger |
| CN201593782U (en) * | 2009-12-28 | 2010-09-29 | 抚顺石油机械有限责任公司 | Coal saver of residual heat boiler |
| CN201897209U (en) * | 2010-11-11 | 2011-07-13 | 大连熵立得传热技术有限公司 | Low-temperature smoke corrosion prevention coal economizer for hot-water backflow |
| CN204665686U (en) * | 2015-05-25 | 2015-09-23 | 苏州迪森生物能源有限公司 | A kind of biomass boiler energy saver |
| CN205402665U (en) * | 2016-03-02 | 2016-07-27 | 天津爱尔普科技发展有限公司 | Ultra -low temperature economizer |
-
2016
- 2016-08-28 CN CN201610744570.0A patent/CN106369584A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1599605A (en) * | 1977-03-22 | 1981-10-07 | Indukal Aps | Fire-tube boiler having an economizer |
| CN1609542A (en) * | 2004-11-03 | 2005-04-27 | 广西壮族自治区桂林化工机械厂 | Jacketed striated pipe deflection rod heat exchanger |
| CN201593782U (en) * | 2009-12-28 | 2010-09-29 | 抚顺石油机械有限责任公司 | Coal saver of residual heat boiler |
| CN201897209U (en) * | 2010-11-11 | 2011-07-13 | 大连熵立得传热技术有限公司 | Low-temperature smoke corrosion prevention coal economizer for hot-water backflow |
| CN204665686U (en) * | 2015-05-25 | 2015-09-23 | 苏州迪森生物能源有限公司 | A kind of biomass boiler energy saver |
| CN205402665U (en) * | 2016-03-02 | 2016-07-27 | 天津爱尔普科技发展有限公司 | Ultra -low temperature economizer |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170201 |
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| RJ01 | Rejection of invention patent application after publication |