CN106369585A - Energy-saving low-temperature economizer - Google Patents
Energy-saving low-temperature economizer Download PDFInfo
- Publication number
- CN106369585A CN106369585A CN201610747083.XA CN201610747083A CN106369585A CN 106369585 A CN106369585 A CN 106369585A CN 201610747083 A CN201610747083 A CN 201610747083A CN 106369585 A CN106369585 A CN 106369585A
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- CN
- China
- Prior art keywords
- casing
- heat exchange
- box
- energy
- side wall
- 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.)
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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
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
- F22D1/08—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement
- F22D1/10—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement in horizontal arrangement
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
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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 an energy-saving low-temperature economizer. The economizer comprises a box and a snake-shaped heat exchange pipe; a smoke inlet is formed in the top of the box, and is in a conical cylinder shape with the small upper portion and the large lower portion, the bottom of the box is closed, a smoke outlet for horizontal smoke outputting is formed in the connecting position of the side wall and the bottom of the box, the smoke outlet for horizontal smoke outputting is formed in the connecting position of the side wall of the box and a smoke ash collection hopper, a venturi pipe is connected to the smoke outlet, the snake-shaped heat exchange pipe is distributed in the box in a zigzag reciprocating manner and is fixed to the box through a supporting frame, a shell is arranged on the outer wall of the box, a sealed cavity is formed between the outer wall of the box and the shell, the snake-shaped heat exchange pipe is provided with a water inlet which penetrates out of the side wall of the upper portion of the box to be communicated with the cavity and a water outlet sequentially penetrating out of the side wall of the box and the side wall of the shell from the lower portion of the box, and the lower portion of the shell is further provided with a water inlet pipe communicating the cavity. The energy-saving low-temperature economizer is simple in structure, high in heat exchange efficiency, long in service life, low in cost, energy-saving and environment-friendly.
Description
Technical field
The present invention relates to economizer is and in particular to a kind of energy-saving low-temperature 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 energy-saving low-temperature economizer.
The technical scheme is that a kind of energy-saving low-temperature economizer, including casing and Serpentiss
Shape heat exchanger tube, the top of described casing is provided with smoke inlet, and described smoke inlet is in up-small and down-big taper tubular, described casing
It is provided with outlet flue, the side wall of described casing and the institute of horizontal smoke at bottom lock, the side wall of described casing and bottom connection
State the outlet flue that cigarette ash collecting bucket joint is provided with horizontal smoke, at described outlet flue, be connected with Venturi tube, described snakelike
Heat exchanger tube is in back and forth to be distributed in described box house and fixed with casing by bracing frame in a zigzag, and the outer wall of described casing has
Form the cavity of sealing, described snakelike heat exchange tube has the upper portion side wall passing casing between the outer wall of one shell and described casing
Connect the water inlet of described cavity and the outlet passing wall box and housing sidewall from the bottom of casing successively, described shell
The bottom of body is additionally provided with the water inlet pipe connecting described cavity.
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, the inwall of described casing is provided with the guiding gutter of downward spiral.
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.Described smoke inlet is in up-small and down-big taper tubular, can be entered with reducing smoke
Flowing velocity after in cartonning body, makes flue gas longer with the time of contact of cabinet wall and snakelike heat exchange tube, heat exchange efficiency
Higher.The Venturi tube connecting at outlet flue makes flue gas stream from the coarse to fine, so that flue gas is formed in the rear side of Venturi exit
One " vacuum " area, the adsorption that this region of no pressure produces, accelerate the flue gas flow rate at outlet flue, make after heat exchange is lowered the temperature
Drop box bottom flue dust by air-flow drive together at exhaust opening discharge casing outside, it is to avoid soot build-up is at casing bottom
Portion, 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, Venturi tube, 11, enter
Mouth, 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 energy-saving low-temperature economizer, including casing 1 and snakelike heat exchange tube 2, the top of described casing 1 sets
It is equipped with smoke inlet 11, described smoke inlet 11 is in up-small and down-big taper tubular, the stream after can entering in casing 1 with reducing smoke
Dynamic speed, makes flue gas longer with the time of contact of casing 1 inwall and snakelike heat exchange tube 2, heat exchange efficiency is higher.
It is provided with the outlet flue of horizontal smoke at the bottom lock of described casing 1, the side wall of described casing 1 and bottom connection
12, the side wall of described casing 1 and described cigarette ash collecting bucket joint are provided with the outlet flue 12 of horizontal smoke, described outlet flue 12
Place is connected with Venturi tube 7, and Venturi tube 7 makes flue gas stream from the coarse to fine, so that the rear side that flue gas exports in Venturi tube 7 is formed
One " vacuum " area, the adsorption that this region of no pressure produces, accelerate the flue gas flow rate at outlet flue 12, make to lower the temperature through heat exchange
Drop afterwards casing 1 bottom flue dust by air-flow drive together at exhaust opening discharge casing 1 outside, it is to avoid soot build-up is in casing
1 bottom, results in blockage to outlet flue 12.
Described snakelike heat exchange tube 2 is back and forth distributed in described casing 1 inside and passes through bracing frame 3 with casing 1 admittedly in zigzag
Fixed, the outer wall of described casing 1 has a cavity 41 forming sealing between a shell and the outer wall of described casing 1, described snakelike changes
Heat pipe 2 has the water inlet 21 of the upper portion side wall described cavity 41 of connection passing casing 1 and passes successively from the bottom of casing 1
Casing 1 side wall and the outlet 22 of housing 4 side wall, the bottom of described housing 4 is additionally provided with the water inlet pipe connecting described cavity 41
5.
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.
The inwall of described casing 1 is provided with the guiding gutter of downward spiral, described guiding gutter downward spiral, on the one hand can rise
To the guide effect to flue gas, the time of contact of flue gas and casing 1 side wall on the other hand can be increased, to casing 1 inner cold water
Pre-heat effect is more preferable.
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 energy-saving low-temperature economizer is it is characterised in that include casing (1) and snakelike heat exchange tube (2), described casing (1)
Top is provided with smoke inlet (11), and described smoke inlet (11) is in up-small and down-big taper tubular, the bottom envelope of described casing (1)
Close, at the side wall of described casing (1) and bottom connection, be provided with the outlet flue (12) of horizontal smoke, the side wall of described casing (1)
It is provided with the outlet flue (12) of horizontal smoke with described cigarette ash collecting bucket joint, described outlet flue (12) place is connected with venturi
Pipe (7), described snakelike heat exchange tube (2) is in back and forth to be distributed in described casing (1) inside in a zigzag and pass through bracing frame (3) and casing
(1) fixing, the outer wall of described casing (1) has the cavity (41) forming sealing between a shell and the outer wall of described casing (1),
Described snakelike heat exchange tube (2) have pass casing (1) upper portion side wall connect described cavity (41) water inlet (21) and from
The bottom of casing (1) passes casing (1) side wall and the outlet (22) of housing (4) side wall successively, and the bottom of described housing (4) is also
It is provided with the water inlet pipe (5) connecting described cavity (41).
2. energy-saving low-temperature economizer according to claim 1 is it is characterised in that be welded with described snakelike heat exchange tube (2)
Fin (6).
3. energy-saving low-temperature economizer according to claim 2 is it is characterised in that described fin (6) is helical fin.
4. energy-saving low-temperature economizer according to claim 2 is it is characterised in that described fin (6) is H type fin.
5. energy-saving low-temperature economizer as claimed in any of claims 1 to 4 is it is characterised in that described housing (4)
Inwall is provided with heat-insulation layer.
6. energy-saving low-temperature economizer as claimed in any of claims 1 to 4 is it is characterised in that described snakelike heat exchange
Pipe (2) is upper to coat wear-preventing paint.
7. energy-saving low-temperature economizer as claimed in any of claims 1 to 4 is it is characterised in that described casing (1)
Inwall is provided with the guiding gutter of downward spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610747083.XA CN106369585A (en) | 2016-08-28 | 2016-08-28 | Energy-saving low-temperature economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610747083.XA CN106369585A (en) | 2016-08-28 | 2016-08-28 | Energy-saving low-temperature economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106369585A true CN106369585A (en) | 2017-02-01 |
Family
ID=57903090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610747083.XA Pending CN106369585A (en) | 2016-08-28 | 2016-08-28 | Energy-saving low-temperature economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106369585A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702084A (en) * | 2017-11-06 | 2018-02-16 | 江阴德耐特重工科技有限公司 | A kind of power plant's low-level (stack-gas) economizer |
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 CN201610747083.XA patent/CN106369585A/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 |
Non-Patent Citations (1)
| Title |
|---|
| 卢啸风: "《石灰石湿法烟气脱硫系统设备运行与事故处理》", 31 May 2009 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702084A (en) * | 2017-11-06 | 2018-02-16 | 江阴德耐特重工科技有限公司 | A kind of power plant's low-level (stack-gas) economizer |
| CN107702084B (en) * | 2017-11-06 | 2022-12-20 | 江阴德耐特重工科技有限公司 | Low-temperature economizer of power plant |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170201 |