CN1128338C - By-pass type complex phase-change heat exchanger - Google Patents
By-pass type complex phase-change heat exchanger Download PDFInfo
- Publication number
- CN1128338C CN1128338C CN01105959A CN01105959A CN1128338C CN 1128338 C CN1128338 C CN 1128338C CN 01105959 A CN01105959 A CN 01105959A CN 01105959 A CN01105959 A CN 01105959A CN 1128338 C CN1128338 C CN 1128338C
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- pipe
- temperature
- change heat
- section
- 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.)
- Expired - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 20
- 230000009466 transformation Effects 0.000 claims description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Air Supply (AREA)
Abstract
The present invention relates to a by-pass type complex phase change heat exchanger for a high smoke gas acid dew point oil-fired boiler. One end of a by-pass pipe is communicated with a low temperature heating air outlet pipe, the other end of the by-pass pipe is communicated with a hot wind outlet by an electric regulating gate plate, and the electric regulating gate plate is controlled by a temperature signal of a surface thermometer. Fin pipes arranged in an inclined way are communicated with a connecting box, part of the fin pipes is positioned in a smoke gas channel, and the other part of the fin pipes is positioned in an air channel. Water is put in the lower part of each fin pipe, and steam is put in the upper part of each fin pipe. The surface thermometer is arranged on the tail row of fin pipes of an outlet of the smoke gas channel, and the top of a phase change segment is added with a steam drum. The by-pass type complex phase change heat exchanger has the advantages of low cost, compact structure and high running performance.
Description
The present invention is a kind of by-pass type complex phase-change heat exchanger that is applied to high flue gas dew point oil burning boiler, particularly to the improvement of its air preheater structure.
The oil burning boiler flue gas dew point can be up to more than 145 ℃.For fear of heating surface low temperature dewfall, the oil burning package boiler exhaust gas temperature reaches 240 ℃ or higher.For energy-conservation, big-and-middle-sized oil burning boiler exhaust gas temperature is about 165 ℃.At this moment, the heating surface wall temperature of conventional air preheater low-temperature zone will suffer serious cold end corrosion about 90-110 ℃.Existing a kind of hot air reflow formula complex phase-change heat exchanger, though can when exhaust gas temperature is 165 ℃ minimum heating surface wall temperature be brought up to more than 150 ℃, its structure exists not enough: in order to improve the air preheater wall temperature, adopted the hot air reflow tubular construction; But hot air reflow has caused the rising of air blast flow and temperature; During the boiler oepration at full load, exhaust gas temperature is higher, and boiler efficiency is decreased; Its hot air reflow has increased the burden of air blast aspect temperature and flow; Structures such as its adjusting section, hot air reflow pipe and cold air bypass pipe are big and complicated simultaneously, increased the difficult arrangement and the equipment cost of structure.
The objective of the invention is, provide a kind of both energy-conservation and prevent that thoroughly dewfall from causing cold end corrosion, device structure is simplified, cost reduces, and moves more cost effective high acid dew point oil burning boiler by-pass type complex phase-change heat exchanger.
The object of the present invention is achieved like this.By-pass type complex phase-change heat exchanger includes phase transformation section 9, middle-temperature section 8, high temperature section 7, finned tube 23, upper header 16, lower collecting box 10, gas flue 24, exhanst gas outlet 12, air channel 25; High temperature section has hot-blast outlet 4, smoke inlet 5; Bypass pipe 3 one ends connect low-temperature heat air outlet slit pipe 22, and the other end connects hot-blast outlet 4.
The phase transformation section is a phase-change heat-exchanger; Tilted-putted finned tube 23 connects lower collecting box 10 and upper header 16, and the finned tube part that is in the below is in gas flue 24, and the finned tube part that is in the top is then in air channel 25; Bottom in the finned tube is a water, and top is steam; Land surface pyrometer is installed on end row's finned tube of smoke outlet.It is in order to satisfy the needs on the boiler structure, to make it rational in infrastructure that phase transformation section finned tube tilts to place.
Operation principle: high-temperature flue gas 6 enters by-pass type complex phase-change heat exchanger by smoke inlet 5, successively heat is passed to high temperature section, middle-temperature section and phase transformation section after, discharge boilers (promptly discharging fume 13) through exhanst gas outlet 12; Cold air 15 enters by-pass type complex phase-change heat exchanger by cool air inlet 14, absorbs flue gas successively and emit heat in phase transformation section, middle-temperature section and high temperature section, becomes hot blast 1 at last and discharges from hot-blast outlet 4.Importantly, the air after the 9 preliminary heating of phase transformation section, a part wherein directly enters hot-blast outlet 4 by bypass pipe 3 as required, mixes with hot blast 1.What of bypath air amount have close ties with the height of each section of air preheater minimum wall temperature, and this also is one of characteristics of the present invention.
The present invention is under low exhaust gas temperature and higher flue gas acid dew point temperature conditions, increases substantially the heating surface wall temperature, thoroughly eliminates the dewfall phenomenon.Key problem in technology is, adopted the measure of phase-change heat-exchanger and bypass pipe simultaneously, replaces return duct with bypass pipe, and the minimum wall temperature of low-temperature zone heating surface wall temperature and middle-temperature section heating surface is risen.This point is even more important when the boiler sub-load.Calculate proof, this substituting not only reduced the air blast load, and increased the optimization space of design, makes the heat exchanger fluid resistance littler, more compact structure, the decline degree of air preheater middle-temperature section and low-temperature zone wall temperature when having improved boiler at low load greatly; Being arranged in the coil pipe in the drum has the boiler water-filling that is under the environment temperature to pass through, and the water after the heating is delivered to oxygen-eliminating device, and this can improve boiler efficiency effectively when the boiler oepration at full load.The wall temperature signal that utilizes land surface pyrometer to provide is in time adjusted the bypass amount of air and is entered the water yield in the drum coil pipe by motorized adjustment flashboard and automatic regulating valve.When wall temperature descends, at first turn down the automatic regulating valve of water, drive the motorized adjustment flashboard of big air then, the automatic regulating valve of water cuts out fully when boiler at low load moves, and the motorized adjustment flashboard of air then reaches maximum; Otherwise, when wall temperature rises, at first turn down the motorized adjustment flashboard of air, drive the automatic regulating valve of big flood then, during the boiler oepration at full load, motorized adjustment flashboard aperture minimum, the automatic regulating valve of water is the aperture maximum then.Guarantee that like this under any boiler working condition, the heating surface wall temperature is all greater than dew-point temperature, and boiler can move under economic potimum, make boiler design and operation have bigger optimization space.The phase-change heat-exchanger that adopts, all finned tube, header are communicated with into a seal-off pressure container with drum.Because inner phase-change working substance is under the certain pressure, corresponding working medium saturation temperature is higher, has guaranteed that the heating surface wall temperature reaches set-point.In order to prevent that phase-change heat-exchanger from causing wearing out because of on-condensible gas occurring, be provided with at the drum top to have the sealed tube of degasification topping up function repeatedly.Because the heating surface dried and clean is difficult for stifled ash, and is safe and reliable.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is prior art structural representations.
1 hot blast, 2 motorized adjustment flashboards, 3 bypass pipes, 4 hot-blast outlets, 5 smoke inlets, 6 high-temperature flue gas, 7 high temperature section, 8 middle-temperature sections, 9 phase transformation sections, 10 lower collecting box, 11 land surface pyrometers, 12 exhanst gas outlets, 13 smoke evacuations, 14 cool air inlets, 15 cold airs, 16 upper headers, 17 tube connectors, 18 automatic regulating valves, 19 coil pipes, 20 drums, 21 sealed tubes, 22 low-temperature heat air outlet slit pipes, 23 finned tubes, 24 gas flues, 25 air channels.
Embodiment: see Fig. 1.By-pass type complex phase-change heat exchanger includes phase transformation section 9, middle-temperature section 8, high temperature section 7, gas flue 24, exhanst gas outlet 12, air channel 25; High temperature section 7 has hot air outlet 4, smoke inlet 5; The phase transformation section has exhanst gas outlet 12, cool air inlet 14 and low-temperature heat air outlet slit pipe 22; Bypass pipe 3 one ends are communicated with hot-blast outlet 4; The other end is communicated with low-temperature heat air outlet slit pipe 22 from phase transformation section 9 by motorized adjustment flashboard 2.The structure of high temperature section and middle-temperature section all is the thread groove tube heat exchanger, and it is horizontally disposed that pipe is.The structure of phase transformation section is that finned tube 23 is communicated with upper header 16 and lower collecting box 10.The finned tube that more radical is arranged in gas flue 24 then has the finned tube of less radical in air channel 25.Place an amount of phase-change working substance in the finned tube; At the top of phase transformation section drum 20 is set, tube connector 17 is communicated with drum with upper header; Sealed tube 21 is equipped with at the top of drum, and coil pipe 19 is housed in the drum.In the porch of coil pipe automatic regulating valve 18 is housed, land surface pyrometer 11 is installed on end row's finned tube at exhanst gas outlet 12 places.
Claims (4)
1, a kind of by-pass type complex phase-change heat exchanger includes phase transformation section (9), high temperature section (7), middle-temperature section (8), finned tube (23), lower collecting box (10), upper header (16); High temperature section (7) has smoke inlet (5), hot-blast outlet (4); Phase transformation section (9) has exhanst gas outlet (12), cool air inlet (14) and low-temperature heat air outlet slit pipe (22); It is characterized in that high-temperature flue gas (6) enters by-pass type complex phase-change heat exchanger by smoke inlet (5), successively heat is passed to high temperature section, middle-temperature section and phase transformation section after, discharge boiler through exhanst gas outlet (12); Cold air (15) enters by-pass type complex phase-change heat exchanger by cool air inlet (14), absorbs flue gas successively and emit heat in phase transformation section, middle-temperature section and high temperature section, becomes hot blast 1 at last and discharges from hot-blast outlet 4; Air after the preliminary heating of phase transformation section (9), a part wherein directly enters hot-blast outlet (4) by bypass pipe (3) as required, mixes with hot blast (1); Bypass pipe (3) one ends connect low-temperature heat air outlet slit pipe, and the other end connects hot-blast outlet.
2, according to the described by-pass type complex phase-change heat exchanger of claim 1, it is characterized in that bypass pipe one end connects low-temperature heat air outlet slit pipe, the other end connects hot-blast outlet by motorized adjustment flashboard (2).
3,, it is characterized in that the phase transformation section is a phase-change heat-exchanger according to the described by-pass type complex phase-change heat exchanger of claim 2; Tilted-putted finned tube connects lower collecting box and upper header, and the finned tube part that is in the below is in gas flue (24), and the finned tube part that is in the top is then in air channel (25); Bottom in the finned tube is a water, and top is steam; Land surface pyrometer is installed on end row's finned tube of smoke outlet.
4, according to the described by-pass type complex phase-change heat exchanger of claim 3, it is characterized in that drum (20) is arranged at the top of phase transformation section, tube connector (17) is communicated with drum with upper header; Coil pipe (19) is arranged in the drum, and stream has adjusting water in the coil pipe, and the coil pipe porch is provided with regulates water automatic regulating valve (18); Automatic regulating valve is controlled by the temperature signal of land surface pyrometer; Sealed tube (21) is equipped with at the top of drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01105959A CN1128338C (en) | 2001-04-12 | 2001-04-12 | By-pass type complex phase-change heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01105959A CN1128338C (en) | 2001-04-12 | 2001-04-12 | By-pass type complex phase-change heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1363798A CN1363798A (en) | 2002-08-14 |
| CN1128338C true CN1128338C (en) | 2003-11-19 |
Family
ID=4655019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01105959A Expired - Fee Related CN1128338C (en) | 2001-04-12 | 2001-04-12 | By-pass type complex phase-change heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128338C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398266B (en) * | 2007-09-28 | 2010-08-04 | 杨本洛 | Double wall temperature composite phase change heat exchanger |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012036B (en) * | 2010-11-02 | 2012-09-05 | 杨本洛 | Composite phase-transition heat exchanging device for warming clean gas fume and recovering exhaust heat after wet desulphurization |
| CN103557532B (en) * | 2013-11-14 | 2015-09-09 | 哈尔滨工业大学 | Phase-change heat-exchange is utilized to avoid the system and method for low-temperature corrosion of air preheater |
| CN104567476B (en) * | 2015-01-05 | 2017-01-18 | 洛阳瑞昌石油化工设备有限公司 | Plate type air preheating device with adjusting function |
-
2001
- 2001-04-12 CN CN01105959A patent/CN1128338C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398266B (en) * | 2007-09-28 | 2010-08-04 | 杨本洛 | Double wall temperature composite phase change heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1363798A (en) | 2002-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201582842U (en) | Combined air preheater | |
| CN102997267B (en) | Smoke reheating device of combining phase-change heat exchanger with net gas heater | |
| CN102901225B (en) | A kind of pressure helical fin coil condensation Heat supply and heat exchange device | |
| CN203949198U (en) | The multistage retracting device of natural gas fume afterheat | |
| CN102141253A (en) | Phase transition combined air preheater | |
| CN2368001Y (en) | Integrated heat-pipe type compound phase transition heat exchanger | |
| CN101261008B (en) | Liquid phase intermediate medium heat exchanging type heat exchanger | |
| CN1128338C (en) | By-pass type complex phase-change heat exchanger | |
| CN2417388Y (en) | Non low temp. corrosion type air preheater | |
| CN200989662Y (en) | Condensation heat exchanger for gas water heater | |
| CN2483615Y (en) | Bypass type composite phase transformation heat exchanger | |
| CN2395243Y (en) | Hot air backflow compound phase changing heat exchanger | |
| CN102721308B (en) | Phase-change heat exchanger with dust self-blowing function | |
| CN102012039B (en) | Forced circulation air preheat system | |
| CN204962841U (en) | Energy -conserving anticorrosive type boiler low temperature waste heat from flue gas recovery unit | |
| CN205679106U (en) | A kind of phase-change thermal energy recovery system | |
| CN201593800U (en) | Air preheater with vertically-flowing smoke reducing from high temperature to low temperature | |
| CN111853845A (en) | Accurate control system of phase change heat exchanger working medium side temperature | |
| CN202002140U (en) | Forced circulation air preheating system | |
| CN1412475A (en) | Separated composite phase-change heat-exchanger | |
| CN205939218U (en) | Energy -efficient air preheater of combined type hydrothermal matchmaker | |
| CN105423550B (en) | A kind of high-efficiency heat pump couples Condensing Gas-fired Hot Water Boiler | |
| CN220119352U (en) | WNS micro-superheated steam boiler and heating system thereof | |
| CN212205772U (en) | Split type phase change heat exchanger | |
| CN116678007B (en) | Boiler provided with low-energy-consumption flue gas waste heat recovery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 1105959.1 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 1238824.6 utility model patent to be given up, and in the 19 volume of the 47 issue of the new type of communique on the patent right to abandon the announcement. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN ZHONGXIN KEYANG ENERGY CONSERVATION AND Free format text: FORMER OWNER: YANG BENLUO Effective date: 20071116 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071116 Address after: 518057 building, Zhongxing building, Zhongxing South Road, South tech Road, Nanshan District hi tech Industrial Park, Shenzhen, four Patentee after: Shenzhen Zhongxing Keyang Energy Saving & Environment Protection Co., Ltd. Address before: 200240, room 75, No. 880, Lane 301, Cangyuan Road, Shanghai, Minhang District Patentee before: Yang Benluo |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031119 Termination date: 20160412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |