CN207113682U - A kind of high-efficiency and energy-saving type phase-change heat-exchanger - Google Patents
A kind of high-efficiency and energy-saving type phase-change heat-exchanger Download PDFInfo
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- CN207113682U CN207113682U CN201720500745.3U CN201720500745U CN207113682U CN 207113682 U CN207113682 U CN 207113682U CN 201720500745 U CN201720500745 U CN 201720500745U CN 207113682 U CN207113682 U CN 207113682U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses a kind of high-efficiency and energy-saving type phase-change heat-exchanger, belongs to high-sulfur, high ash content fume afterheat utilizes field.The direction of the phase-change heat-exchanger interior edge sweep of gases is disposed with guiding region, abrasionproof sacrificial region, high-temperature flue gas phase inversion hot-zone, low-temperature flue gas phase inversion hot-zone and regulatory region.The utility model is effectively taken precautions against and controlled the presence and harm of corrosion, wear, dust stratification operating mode by setting different regions, and structure different in different zones, fully, efficiently make use of fume afterheat to be exchanged heat；The application of this phase-change heat-exchanger, particularly high-sulfur, ash content coal area are improved simultaneously, it is ensured that phase-change heat-exchanger is run steadily in the long term.
Description
Technical field
The utility model belongs to high-sulfur, high ash content fume afterheat utilizes field, especially a kind of high-efficiency and energy-saving type phase inversion
Hot device, it for a long time, stably can effectively be widely used in fume afterheat utilization.
Background technology
For Thermal generation unit at present still for the main generating set in China, flue gas caused by fire coal has taken away substantial amounts of cigarette
Gas waste heat, improve the heat loss due to exhaust gas of boiler.This not only reduces boiler thermal efficiency of cycle, also exacerbates atmosphere pollution.With
The serious and boiler smoke discharge standard year by year of atmosphere pollution improves increasingly, and energy-saving and emission-reduction and minimum discharge are carried by country
A high new height.Therefore, the common technology of energy-saving and emission-reduction is effectively already turned into using fume afterheat by heat exchanger.
The energy-saving and emission-reduction that phase-change heat-exchanger is widely used in thermal power plant as a kind of fume afterheat using technology are transformed, and
Obtain good effect.Due in flue gas contain higher concentration in the form of flying dust existing for solid particle, easily cause to exchange heat
The abrasion of device；In addition, the also sulfuric acid vapor containing higher concentration in flue gas, if flue-gas temperature drop is too low, the water in flue gas steams
Vapour and sulfuric acid vapor combine and will cause low-temperature corrosion to equipment；Secondly, substantial amounts of flying dust is contained in flue gas, it is easy to be deposited on
On heat exchanger, the thermal resistance of heat exchanger is caused, reduces the heat exchange efficiency of heat exchanger.Therefore, it is necessary to which cigarette can effectively be prevented by developing
Gas heat exchanging device cause corrosion, wear and reduce dust stratification New-type phase change heat exchanger, can for a long time, stably effectively utilize cigarette
Gas waste heat.
At present, there are a variety of improvement type heat exchangers, but often only possess one of which feature, this is difficult that satisfaction is existing at present
Fume afterheat utilizes, and the utility model then devises a set of effectively can prevent and control flue gas corrosion, abrasion and reduction
The New-type phase change heat exchanger of dust stratification.
Utility model content
It is difficult to solve flue gas heat exchanging device simultaneously to cause burn into solve a variety of improvement type heat exchangers existing for prior art
Abrasion and dust stratification problem, it is impossible to which the defects of meeting existing fume afterheat utilization at present, the utility model offer is a kind of efficiently
Energy-saving phase-change heat-exchanger.
To achieve the above object, the utility model uses following technical proposals：
A kind of high-efficiency and energy-saving type phase-change heat-exchanger, the direction of the phase-change heat-exchanger interior edge sweep of gases are disposed with water conservancy diversion
Area, abrasionproof sacrificial region, high-temperature flue gas phase inversion hot-zone, low-temperature flue gas phase inversion hot-zone and regulatory region；
Guiding region includes flue gas expanding reach and guide vane；
Abrasionproof sacrificial region includes false tube and the heat-exchange finned tube with anti-abrasion cover, at false tube and heat-exchange finned tube with anti-abrasion cover
In the windward side of sweep of gases；
High-temperature flue gas phase inversion hot-zone includes the first flue gas heat-exchange unit, the second flue gas heat-exchange unit, the 3rd flue gas heat-exchange unit, the
H types fin heat exchange pipe, the first finned tube saturated vapor that one wrong arrangement is put rise header and the first finned tube saturation water declines
Header；
Low-temperature flue gas phase inversion hot-zone includes the 4th flue gas heat-exchange unit, the 5th flue gas heat-exchange unit, the 6th flue gas heat-exchange unit, the
H types fin heat exchange pipe, the second finned tube saturated vapor that two wrong arrangements are put rise header and the second finned tube saturation water declines
Header；
Regulatory region includes light pipe, light pipe saturated vapor rises header and light pipe saturation water declines header.
Using above-mentioned technical proposal, guiding region contacts and controls flue gas at first, so as to get up to the flue gas flow field (temperature of heat-transfer surface
Spend field and velocity field) more uniformly, avoid the occurrence of smoke corridor, flue gas bias current and produce flue gas vortex, reduce abrasion and dust stratification
The probability of generation.Abrasionproof sacrificial region is in the windward side of sweep of gases, reduces flue gas and is worn to caused by equipment.As flue gas leads to
Temperature is gradually reducing after crossing heat exchanger, and high-temperature flue gas phase inversion hot-zone and low-temperature flue gas phase inversion hot-zone can carry out different cigarettes
Effective heat exchange at a temperature of gas, i.e., the heat transfer zone according to the grade of fume afterheat by different temperatures section, different H type fin knots
Structure (fin height, spacing, thickness) fully efficiently utilizes residual heat resources.High-temperature flue gas phase inversion hot-zone and low-temperature flue gas phase inversion
H type fins are fitted with the heat exchanger tube of hot-zone, effectively increase heat exchange area, increase the flow area of flue gas so that flue gas
Turbulent flow is formed, reduces flow of flue gas speed, controls its flue gas flow rate in 8-10m/s or so, reduction heating surface wear.End is set
There is regulatory region, phase inversion heat is adjusted according to the size of exhaust gas volumn at any time, improve heat exchanger wall temperature and be higher than acid dew point, reduce excessive
Low-temperature corrosion occurs so as to cause flue-gas temperature to decline to a great extent using fume afterheat.It is different from other directly changing using flue gas
Hot device, the phase-change heat-exchanger absorb fume afterheat by flue gas heat-exchange unit and produce saturated vapor, utilize saturated vapor and saturation water
The latent heat undergone phase transition realizes heat exchange, avoids the occurrence of heat exchanger leakage so as to which cause can to need to heat low-temperature receiver pollution
Energy.
Further, the first flue gas heat-exchange unit, the second flue gas heat-exchange unit, the 3rd flue gas heat-exchange unit, the 4th flue gas heat-exchange unit,
5th flue gas heat-exchange unit, the 6th flue gas heat-exchange unit are obliquely installed along the trend of flue gas, inclination angle=15 °.
Using above-mentioned technical proposal, the first to the 6th flue gas heat-exchange unit mounting design is tilts 15 degree, using heated upper
Between lift-off and not heated down-comer composition Natural Circulation, carrys out forced conveyance Cooling and Heat Source without other power-equipments, reduces energy consumption,
It is non-maintaining, while effectively rate of circulating flow can be controlled to avoid separation of two.
Further, phase-change heat-exchanger uses steel design as framework, equal with the region of smoke contacts in phase-change heat-exchanger
Made using ND steel.
Using above-mentioned technical proposal, steel design is used to strengthen the structural strength of phase-change heat-exchanger for framework.Using ND steel
Corrosion resistance can be improved with the low-temperature dew point corrosion of resistance to sulfuric acid.
Further, guiding region is tubaeform, abrasionproof sacrificial region, high-temperature flue gas phase inversion hot-zone, low-temperature flue gas phase inversion
Hot-zone and regulatory region are rectangle.
Beneficial effect：
The utility model is effectively taken precautions against and controlled by setting different regions, and structure different in different zones
The presence and harm of corrosion, wear, dust stratification operating mode, fully, efficiently fume afterheat make use of to be exchanged heat；Improve simultaneously
The application of this phase-change heat-exchanger, particularly high-sulfur, ash content coal area, it is ensured that phase-change heat-exchanger is run steadily in the long term.
Brief description of the drawings
Fig. 1 is each area schematic of the present utility model；
Fig. 2 is guiding region schematic diagram of the present utility model；
Fig. 3 is abrasionproof sacrificial region of the present utility model and high-temperature flue gas phase inversion hot-zone schematic diagram；
Fig. 4 is low-temperature flue gas phase inversion hot-zone of the present utility model and regulatory region schematic diagram.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
As Figure 1-4, a kind of high-efficiency and energy-saving type phase-change heat-exchanger, the direction of the phase-change heat-exchanger interior edge sweep of gases according to
It is secondary to be provided with guiding region 1, abrasionproof sacrificial region 2, high-temperature flue gas phase inversion hot-zone 3, low-temperature flue gas phase inversion hot-zone 4 and regulatory region 5；
Guiding region 1 includes flue gas expanding reach 6 and guide vane 7；
Abrasionproof sacrificial region 2 includes false tube 8 and the heat-exchange finned tube 9 with anti-abrasion cover, false tube 8 and the heat exchange fin with anti-abrasion cover
Pipe 9 is in the windward side of sweep of gases；
High-temperature flue gas phase inversion hot-zone 3 includes the first flue gas heat-exchange unit 10, the second flue gas heat-exchange unit 11, the 3rd flue gas heat exchange
H types fin heat exchange pipe 13, the first finned tube saturated vapor that the wrong arrangement of device 12, first is put rise the finned tube of header 14 and first
Saturation water declines header 15；
Low-temperature flue gas phase inversion hot-zone 4 includes the 4th flue gas heat-exchange unit 16, the 5th flue gas heat-exchange unit 17, the 6th flue gas heat exchange
H types fin heat exchange pipe 19, the second finned tube saturated vapor that the wrong arrangement of device 18, second is put rise the finned tube of header 20 and second
Saturation water declines header 21；
Regulatory region 5 includes light pipe 22, light pipe saturated vapor rises header 23 and light pipe saturation water declines header 24.
The utility model phase-change heat-exchanger uses steel design as framework, and ND steels are used with the region of smoke contacts
Make, guiding region 1 is tubaeform, and remaining region is rectangle.Flue gas passes sequentially through guiding region 1, abrasionproof sacrificial region 2, high-temperature flue gas
Phase inversion hot-zone 3, low-temperature flue gas phase inversion hot-zone 4 and regulatory region 5, high effective flue gas is carried out by the heat exchanger tube of different structure designs
With the heat exchange of device of working medium, so as to produce saturated vapor, efficient phase transformation is realized by the steam rising space and underwater drop space.Cigarette
After the flue gas expanding reach 6 and guide vane 7 of guiding region 1, the flue gas flow field (temperature field and velocity field) after water conservancy diversion becomes gas
Must be more uniform, avoid and smoke corridor, flue gas bias current and generation flue gas vortex occur.Subsequently flow to the vacation of abrasionproof sacrificial region 2
Pipe 8 and the heat-exchange finned tube 9 with anti-abrasion cover, wear to sacrifice by material object and complete the anti-wear function of second.Flue gas this moment
Flow field is sufficiently stable and uniform, and particularly the flow control of flue gas is just right, in addition the H type wings in phase inversion hot-zone
Piece special construction, so that can efficiently be utilized by high-temperature flue gas phase inversion hot-zone 3 and low-temperature flue gas phase inversion hot-zone 4
Fume afterheat is exchanged heat, while turn avoid the corrosion, wear and dust stratification of flue gas.End sets regulatory region 5, according to exhaust gas volumn
Size adjust phase inversion heat at any time, timely adjustment heat exchanger wall temperature, cause wall temperature be higher than acid dew point all the time, reduce excessively sharp
Low-temperature corrosion occurs so as to cause flue-gas temperature to decline to a great extent with fume afterheat.
This phase-change heat-exchanger excellent performance, flue gas exhaust gas temperature was both reduced, has improved dedusting and desulfuration efficiency, had been realized
Emission reduction, while fume afterheat heat-setting water (low-temperature receiver) is make use of again, steam pumping heating low-temperature receiver is reduced, improves boiler thermal effect
Rate, realize energy-conservation.To improve environmental quality as core, pollution emission reduction is important means, carries forward vigorously reality for active response country
Coal-burning power plant's minimum discharge transformation is applied, the long-range strategy and policy of energy-saving and emission-reduction is realized, possesses the stronger market competitiveness.
Limitation to scope of protection of the utility model, one of ordinary skill in the art should be understood that in skill of the present utility model
On the basis of art scheme, those skilled in the art need not pay the various modifications that creative work can make or deformation still exists
Within the scope of protection of the utility model.
Claims (4)
- A kind of 1. high-efficiency and energy-saving type phase-change heat-exchanger, it is characterised in that：The direction of the phase-change heat-exchanger interior edge sweep of gases according to It is secondary be provided with guiding region (1), abrasionproof sacrificial region (2), high-temperature flue gas phase inversion hot-zone (3), low-temperature flue gas phase inversion hot-zone (4) and Regulatory region (5)；The guiding region (1) includes flue gas expanding reach (6) and guide vane (7)；The abrasionproof sacrificial region (2) includes false tube (8) and the heat-exchange finned tube (9) with anti-abrasion cover, false tube (8) and with anti-abrasion cover Heat-exchange finned tube (9) is in the windward side of sweep of gases；The high-temperature flue gas phase inversion hot-zone (3) includes the first flue gas heat-exchange unit (10), the second flue gas heat-exchange unit (11), the 3rd cigarette H types fin heat exchange pipe (13), the first finned tube saturated vapor that gas heat exchanger (12), the first wrong arrangement are put rise header (14) Decline header (15) with the first finned tube saturation water；The low-temperature flue gas phase inversion hot-zone (4) includes the 4th flue gas heat-exchange unit (16), the 5th flue gas heat-exchange unit (17), the 6th cigarette H types fin heat exchange pipe (19), the second finned tube saturated vapor that gas heat exchanger (18), the second wrong arrangement are put rise header (20) Decline header (21) with the second finned tube saturation water；The regulatory region (5) includes light pipe (22), light pipe saturated vapor rises header (23) and light pipe saturation water down-comer collection Case (24).
- 2. high-efficiency and energy-saving type phase-change heat-exchanger according to claim 1, it is characterised in that：First flue gas heat-exchange unit (10), the second flue gas heat-exchange unit (11), the 3rd flue gas heat-exchange unit (12), the 4th flue gas heat-exchange unit (16), the 5th flue gas heat-exchange unit (17), the 6th flue gas heat-exchange unit (18) is obliquely installed along the trend of flue gas, inclination angle=15 °.
- 3. high-efficiency and energy-saving type phase-change heat-exchanger according to claim 1, it is characterised in that：The phase-change heat-exchanger uses steel Structure processed is framework, and phase-change heat-exchanger is interior to be made with the region of smoke contacts using ND steel.
- 4. high-efficiency and energy-saving type phase-change heat-exchanger according to claim 1, it is characterised in that：The guiding region (1) is loudspeaker Shape, abrasionproof sacrificial region (2), high-temperature flue gas phase inversion hot-zone (3), low-temperature flue gas phase inversion hot-zone (4) and regulatory region (5) are square Shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720500745.3U CN207113682U (en) | 2017-05-08 | 2017-05-08 | A kind of high-efficiency and energy-saving type phase-change heat-exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720500745.3U CN207113682U (en) | 2017-05-08 | 2017-05-08 | A kind of high-efficiency and energy-saving type phase-change heat-exchanger |
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| CN207113682U true CN207113682U (en) | 2018-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404954A (en) * | 2018-12-06 | 2019-03-01 | 南京国能环保工程有限公司 | Pinch-point temperature difference automatic regulation type phase-change heat-exchanger |
-
2017
- 2017-05-08 CN CN201720500745.3U patent/CN207113682U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404954A (en) * | 2018-12-06 | 2019-03-01 | 南京国能环保工程有限公司 | Pinch-point temperature difference automatic regulation type phase-change heat-exchanger |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.23, Liuzhou North Road, Jiangbei new district, Nanjing, Jiangsu Province, 211500 Patentee after: Nanjing Zhongdian environmental protection water Co., Ltd Address before: 211100 room 420 of Pukou District high and New Development Zone, Nanjing City, Nanjing, Jiangsu Patentee before: NANJING GUONENG ENVIRO-PROTECTION PROJECT Co.,Ltd. |