CN201628391U - Integrated flue-gas condensing waste-heat recovery boiler - Google Patents
Integrated flue-gas condensing waste-heat recovery boiler Download PDFInfo
- Publication number
- CN201628391U CN201628391U CN2010201244072U CN201020124407U CN201628391U CN 201628391 U CN201628391 U CN 201628391U CN 2010201244072 U CN2010201244072 U CN 2010201244072U CN 201020124407 U CN201020124407 U CN 201020124407U CN 201628391 U CN201628391 U CN 201628391U
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- flue
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- gas
- flue gas
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
Disclosed is an integrated flue-gas condensing waste-heat recovery boiler, which belongs to the field of the heating equipment, in particular to a dual-return shell-type hot-water or steam condensing boiler for fuel oil and fuel gas. The technical scheme adopted by the utility model is as follows: an air inlet of a plate-fin type air pre-heater is connected to a blower and an air outlet thereof is connected to an air inlet of a burner; a flame port of the burner is connected with the left end of a hearth; a shell of the hearth is a corrugated internal furnace; the right end of the corrugated internal furnace is an internal furnace roof; the internal furnace roof is communicated with a front wall of a rear smoke box through a convection tube bundle; the rear smoke box is communicated with a convection heating surface which is communicated with a front smoke box; a flue-gas inlet of the air pre-heater is communicated with the front smoke box, and a flue-gas outlet thereof is communicated with a flue-gas inlet of a condenser; a flue-gas outlet of the condenser is communicated with a flue-gas exhaust port, and the above components are integrated with the shell of the boiler. The integrated flue-gas condensing waste-heat recovery boiler has the advantage that: the air pre-heater, the flue-gas condenser and the boiler are integrated into one body, therefore, the boiler has more-compact overall structure, strong corrosion resistance, safer device, high stability and reliability, and long service life.
Description
Technical field
The utility model belongs to the heating equipment field, the condensing two backhaul pan shell type hot water or the steam condenser boiler of particularly a kind of fuel oil, combustion gas.
Background technology
Boiler is a kind of heating equipment, and it utilizes oil or gas to be fuel, produces heat through burning and produces steam or hot water.With the natural gas is the boiler of fuel, and discharged flue gas has quite high temperature (150～250 ℃), contains about 15～19% (the volume compositions) of steam, is the main carrier of flue gas heat.If the exhaust gas temperature of boiler is dropped to enough low level, the steam that is superheat state so in the flue gas will condense and emit the latent heat of vaporization, and the boiler that the latent heat of vaporization in the flue gas is recycled is called condenser boiler.Traditional condenser boiler is installed flue gas waste heat recovery apparatus at smoke outlet usually, is used for the heating boiler feedwater, requires the boiler must continuous water feeding like this, and fluctuating temperature is big, and control is complicated.Perhaps flue gas waste heat recovery apparatus is installed and is used for heating water in the softened water tank at smoke outlet, because of steam boiler per hour water consumption equal boiler capacity, and the exhaust gas temperature of steam boiler is mostly at 230～250 ℃, after utilizing this cover flue gas waste heat recovery apparatus, water temperature will be raised to 65～75 ℃, consider the heat transfer temperature and pressure, and flue-gas temperature is more than 85 ℃, and gaseous fuel dew point temperature such as natural gas make this device can't absorb the latent heat of vaporization of steam in the flue gas at 55～62 ℃.In addition, also there is following shortcoming in present flue gas waste heat recovery apparatus:
1, condenser adopts coiled pipe, and heat exchange efficiency is low, and volume is big, and steel quantity consumption is big.
2, condenser adopts steel-aluminum composite fin tube, and inside is carbon steel, and the outside part that contacts with flue gas is an aluminium, adopts the mode of extruding to be compound to together, this finned tube corrosion resistance relatively poor (condensed water is faintly acid, and certain corrosion is arranged), and service life is short.
3, condenser adopts stainless steel finned tube, and service life is longer, but the cost height.
Summary of the invention
The purpose of this utility model is the overall structure that changes the condensing horizontal boiler, and the integrated flue gas condensing heat recovery technology of employing plate type heat exchanger modular combination design and equipment are to overcome the defective of aforementioned boiler.
The technical solution of the utility model is: the air air inlet of plate-fin air preheater is connected to air blast, its air air outlet is connected to the air inlet of burner, the flame hole of burner inserts the burner hearth left end, the shell of burner hearth is a corrugated flue, the right-hand member of corrugated flue is the flue top, the flue top is communicated with by convection bank with back smoke box antetheca, back smoke box is communicated with convection heating surface, convection heating surface is communicated with front smoke box, front smoke box is communicated with the flue gas air inlet of air preheater, its flue gas air outlet is communicated with the smoke inlet of condenser, and the exhanst gas outlet of condenser is communicated with exhaust opening, and above-mentioned parts and boiler shell are structure as a whole; The plate-fin air preheater constitutes each plane by dividing plate, fin and end socket, and by 20～50 stacking combining in plane, adjacent plane revolves and turn 90 degrees placement again; Condenser is formed by 5 types of asymmetric board-like flue gas condensing heat exchanger combinations, and each type all has exhaust gases passes and aquaporin, and the quantity difference of its heat exchange plate is 80～140.
The beneficial effects of the utility model: two fluids are the heat exchange of adverse current partition in the plate-fin air preheater, and heat transfer coefficient is generally 3 times of shell-and-tube heat exchanger, heat recovery when being more suitable for the little temperature difference (1.5～2 ℃), and effect is best when being used for gas-gas heat exchange.The recovering effect of the low potential energy heat of asymmetric board-like flue gas condenser is good, and employing separate unit plate type heat exchanger reaches the heat recovery rate more than 90%.Air preheater, flue gas condenser and boiler integrated design make the boiler overall structure compact more, and corrosion resistance is strong, equipment is safer, and is reliable and stable, longer service life.
Description of drawings
Accompanying drawing 1 is that the utility model is faced structural representation.
Accompanying drawing 2 is the right TV structure schematic diagrames of the utility model.
Accompanying drawing 3 is plate-fin air preheater structural representations.
The specific embodiment
The air air inlet of plate-fin air preheater 1 is connected to air blast 12, and the air air outlet is connected to the air inlet of burner 3.This air preheater 1 constitutes the plane by dividing plate 1-1, fin 1-3 and end socket 1-2,20～50 stacking combining in plane, and adjacent plane revolves and turn 90 degrees placement, and when fin inlet in one side was air duct, the another side fins inlet that is 90 degree was exhaust gases passes.Separator material is that siliceous 5～12% brazing filler metal alloy, block board thickness are 0.36～2mm at the about 0.1～0.4mm of base metal (aluminium manganese metal) surface coverage one bed thickness, and cover sheet thickness is 5～6mm.The flame hole of burner 3 inserts burner hearth 5 left ends, the shell of burner hearth 5 is a corrugated flue 6, and the right-hand member of corrugated flue 6 is the flue top, and the flue top is communicated with by convection bank 8 with back smoke box 9 antethecas, the effect of convection bank 8 is to stop the radiation damage of flame to the back smoke box, and it is long-pending to increase radiation heating-surface.Back smoke box 9 is communicated with convection heating surface 11, and convection heating surface 11 is communicated with front smoke box 4, and front smoke box 4 is communicated with the flue gas air inlet of air preheater 1, and the flue gas air outlet of air preheater 1 is communicated with the smoke inlet of condenser 2, and the exhanst gas outlet of condenser 2 is communicated with exhaust opening 13.Condenser 2 is according to modularized design, form by 5 types of asymmetric board-like flue gas condensing heat exchanger combinations, each type all has exhaust gases passes 2-4 and aquaporin 2-3, exhaust gases passes 2-4 is formed by the plate of varying number, quantity is 80～140, and the heat exchange area difference of dissimilar modules has formed different specified heat exchange amounts, module can make up according to the boiler needs, to satisfy the needs of flue gas waste heat recovery.Above-mentioned parts and boiler shell 7 are structure as a whole, and also are added with spring explosion proof door 10 on the boiler.
The utility model has adopted air preheater and flue gas condensing waste-heat recovery device simultaneously.By air preheater flue-gas temperature is reduced to about 145 ℃ by 230～240 ℃, with the burning usefulness air by 20～30 ℃, rise to 105～115 ℃, the flue gas of air preheater outlet enters the flue gas condensing waste-heat recovery device once more, and the water in the heating softened water tank makes water temperature be promoted to 35～45 ℃ by 10 ℃, and average exhaust gas temperature is reduced to below 70 ℃, make the part or all of condensation of steam in the flue gas, absorbed most of latent heat, reach the purpose of condensation waste heat recovery.
The utility model also has following advantage:
1, the shared space of plate type heat exchanger is littler. The plate type heat exchanger floor space only has 1/3～1/4 of shell-and-tube heat exchanger under same working condition, and weight is 1/5 of other condensers, can arrange in the assembling of the front of boiler, and the space that takies seldom.
2, less scaling. The formed special flow passage of plate ripple makes fluid media (medium) than low reynolds number (Re) Shi Jike strong erratic flow (turbulent flow) take place, and erratic flow has again the effect of self-purification to generate to prevent dirt.
3, hot transfer efficiency height. The flow-rate ratio excellent adds complete reverse flow, heat transfer temperature difference can be selected very lowly, therefore be very suitable for the recovery of low potential energy heat, employing separate unit plate type heat exchanger reaches the heat recovery rate more than 90%, heat transfer efficiency is higher 3～8 times than shell-and-tube heat exchanger, obtains bigger heat transfer area under the situation of small size.
4, corrosion resistance is strong, mechanical performance is remarkable.Adopt stainless steel, the brazing plate type heat exchanger of brazing or nickel weldering has good anti-corrosion capability and mechanical strength, can guarantee the safety of equipment, and is reliable, stable, long service life.
Claims (4)
1. integrated flue gas condensing waste heat recovery boiler, it is characterized in that: the air air inlet of plate-fin air preheater (1) is connected to air blast (12), its air air outlet is connected to the air inlet of burner (3), the flame hole of burner (3) inserts burner hearth (5) left end, the shell of burner hearth (5) is corrugated flue (6), the right-hand member of corrugated flue (6) is the flue top, the flue top is communicated with by convection bank (8) with back smoke box (9) antetheca, back smoke box (9) is communicated with convection heating surface (11), convection heating surface (11) is communicated with front smoke box (4), front smoke box (4) is communicated with the flue gas air inlet of air preheater (1), its flue gas air outlet is communicated with the smoke inlet of condenser (2), the exhanst gas outlet of condenser (2) is communicated with exhaust opening (13), and above-mentioned parts and boiler shell (7) are structure as a whole.
2. a kind of integrated flue gas condensing waste heat recovery boiler according to claim 1, it is characterized in that: plate-fin air preheater (1) constitutes each plane by dividing plate (1-1), fin (1-3) and end socket (1-2), again by 20～50 stacking combining in plane.
3. a kind of integrated flue gas condensing waste heat recovery boiler according to claim 1 is characterized in that: every layer of adjacent plane of plate-fin air preheater (1) revolves and turn 90 degrees placement.
4. a kind of integrated flue gas condensing waste heat recovery boiler according to claim 1, it is characterized in that: condenser (2) is combined by 5 types of asymmetric board-like flue gas condensing heat exchangers (2-1,2-2), each type all has exhaust gases passes (2-4) and aquaporin (2-3), the quantity difference of its heat exchange plate is 80～140.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201244072U CN201628391U (en) | 2010-02-02 | 2010-02-02 | Integrated flue-gas condensing waste-heat recovery boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201244072U CN201628391U (en) | 2010-02-02 | 2010-02-02 | Integrated flue-gas condensing waste-heat recovery boiler |
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| Publication Number | Publication Date |
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| CN201628391U true CN201628391U (en) | 2010-11-10 |
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| CN2010201244072U Expired - Lifetime CN201628391U (en) | 2010-02-02 | 2010-02-02 | Integrated flue-gas condensing waste-heat recovery boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226512A (en) * | 2011-06-07 | 2011-10-26 | 无锡中阳新能源科技有限公司 | Condensation type surface combustion boiler |
| CN103471078A (en) * | 2013-09-04 | 2013-12-25 | 无锡市沈能节能锅炉有限公司 | Special condensing steam boiler |
| CN104296380A (en) * | 2013-07-15 | 2015-01-21 | 北京恒盛春环保科技有限公司 | Combustion type heat supply system |
| CN105953260A (en) * | 2016-05-11 | 2016-09-21 | 中山普瑞玛实业有限公司 | Efficient centralized air inducing and distributing system for module furnace |
-
2010
- 2010-02-02 CN CN2010201244072U patent/CN201628391U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226512A (en) * | 2011-06-07 | 2011-10-26 | 无锡中阳新能源科技有限公司 | Condensation type surface combustion boiler |
| CN104296380A (en) * | 2013-07-15 | 2015-01-21 | 北京恒盛春环保科技有限公司 | Combustion type heat supply system |
| CN104296380B (en) * | 2013-07-15 | 2017-05-17 | 北京恒盛春环保科技有限公司 | Combustion type heat supply system |
| CN103471078A (en) * | 2013-09-04 | 2013-12-25 | 无锡市沈能节能锅炉有限公司 | Special condensing steam boiler |
| CN105953260A (en) * | 2016-05-11 | 2016-09-21 | 中山普瑞玛实业有限公司 | Efficient centralized air inducing and distributing system for module furnace |
| CN105953260B (en) * | 2016-05-11 | 2018-06-29 | 广东普瑞玛实业有限公司 | Efficient centralized air inducing and distributing system for module furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101110 Effective date of abandoning: 20110928 |