CN102913896A - Coal economizer for power station boiler - Google Patents
Coal economizer for power station boiler Download PDFInfo
- Publication number
- CN102913896A CN102913896A CN2012104700969A CN201210470096A CN102913896A CN 102913896 A CN102913896 A CN 102913896A CN 2012104700969 A CN2012104700969 A CN 2012104700969A CN 201210470096 A CN201210470096 A CN 201210470096A CN 102913896 A CN102913896 A CN 102913896A
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- China
- Prior art keywords
- temperature
- bypass
- valve
- economizer
- station boiler
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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
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- 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
- F22D1/12—Control devices, e.g. for regulating steam temperature
Abstract
The invention discloses a coal economizer for a power station boiler. The coal economizer comprises a water supply pipeline (4), an inlet header (1), a heat transfer face (2), an outlet header (3) and an outlet pipeline (8), wherein flue gas flows outside the heat transfer face to heat up water, a first bypass duct (5) which is used for connecting the water supply pipeline (4) and the outlet pipeline (8) is arranged between the water supply pipeline (4) and the outlet pipeline (8), and a bypass temperature adjusting device (9) is arranged on the first bypass duct (5). According to a system of the coal economizer, the traditional system design is improved, and the coal economizer has a function of temperature adjustment at the same time when the coal economizer can reduce the temperature of the flue gas at an outlet of the boiler and increase the water supply temperature.
Description
Technical field
The present invention relates to a kind of station boiler economizer.
Background technology
Economizer is exactly to be arranged in the heating surface that in the station boiler flue boiler feedwater is heated, and is flue gas than lower temperature because its absorbs, has reduced the exhaust gas temperature of flue gas, has saved the energy, has improved efficient, so be referred to as economizer.
Usually economizer can be divided into arranged in series, be arranged in parallel or system that connection in series-parallel has concurrently according to the difference of flow process, and different systems is applied to namely reduce the flue-gas temperature of boiler export in the different steam generator systems, has heated again the feedwater of boiler.
But no matter be to adopt above which kind of system of putting forward, the heating surface that is referred to as economizer of the process that feeds water is arranged in the flue, and by from the fume side heat exchange, namely the heat of economizer medium comes from flue gas.
But present economizer does not have the function of temperature adjustment.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can fluid medium carry out thermoregulator station boiler economizer.
For achieving the above object, technical scheme of the present invention is, a kind of station boiler economizer, comprise feedwater piping, import header, heat-transfer surface, outlet header and outlet conduit, flue gas flows through outside heat-transfer surface feedwater is heated, between feedwater piping and outlet conduit, be provided with the first bypass duct that connects both, also be provided with the bypass temperature control device on described the first bypass duct.The present invention can suitably regulate the temperature by the fluid media (medium) in the container as required when the former economizer of realization system reduces the function of boiler export flue-gas temperature, raising feed temperature, its temperature is controlled in certain scope.
Feedwater piping divides two-way by threeway, and one the road goes to the first bypass duct, and one the tunnel is the trunk line of going to heat-transfer surface, is provided with control valve on described trunk line or the bypass duct.
Described bypass temperature control device can by the heat-transfer surface of flue gas, also be provided with shut-off valve on trunk line or the bypass duct.
Described threeway is solenoid directional control valve.
Described bypass temperature control device comprises container, import header, heat-transfer surface and outlet header; Container flow cross by the flue gas of temperature adjustment.
One temperature survey and feedback device are set behind the point of the first bypass duct and outlet conduit, be used for the MEASUREMENT OF STEAM coolant-temperature gage, one feedback device is set, and so that when temperature low temperature temperature, the first bypass valve aperture diminishes between the first bypass valve and temperature measuring equipment.
Outlet at container arranges a temperature survey and feedback device, is used for measuring flue-gas temperature, a feedback device is set between the first bypass valve and temperature measuring equipment, and so that when temperature low temperature temperature, the first bypass valve aperture diminishes.
Also comprise a switching device, described switching device comprises: the shut-off valve in the control valve in the first bypass, the control valve on the trunk line, the shut-off valve on the outlet conduit, the second bypass; When the control valve on the trunk line, the shut-off valve on the outlet conduit are opened, when the shut-off valve in the control valve in the first bypass, the second bypass cuts out, the economizer counter-flow arrangement; Shut-off valve in the control valve in the first bypass, the second bypass is opened, the control valve on the trunk line, when the shut-off valve on the outlet conduit cuts out, economizer following current.
At the economizer smoke outlet one temperature measuring equipment is set, is used for measuring flue-gas temperature, a feedback device is set between switching device and temperature measuring equipment, and so that when temperature low temperature temperature, switching device is carried out the switching of time and tide.The technical program can by the switching of co-current flow and counter-current flow, change the temperature of economizer exit flue gas.When the economizer adverse current, the heat transfer temperature and pressure are high, and caloric receptivity is large, and the flue-gas temperature of economizer exit is low; When the economizer following current, the heat transfer temperature and pressure are low, and it is little to recept the caloric, and the flue-gas temperature of economizer exit is high.
Economizer system involved in the present invention improves the system of routine, make economizer exercise reduce the boiler export flue-gas temperature, improve the function of feed temperature in, hold concurrently and have the function of temperature adjustment.
Description of drawings
Fig. 1 is the economizer system schematic;
Fig. 2 is bypass temperature control device schematic diagram;
Fig. 3 is that time and tide switches schematic diagram.
Among the figure: economizer import header 1, conventional economizer system (can be parallel connection, series connection or connection in series-parallel pattern) 2, economizer exit header 3, feedwater piping 4, the first bypass duct 5, trunk line control valve 6, the first bypass valves 7, economizer exit pipeline 8, bypass temperature control device 9, import header 10, heat-transfer surface 11, outlet header 12, container (pipeline or header) 13, outlet conduit shut-off valve 14, the second bypass shut-off valve 15.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments, but the present invention is not limited to following embodiment.
The economizer system comprises: economizer import header, economizer surface and economizer exit header, economizer exit pipeline.In economizer import header import connection is feedwater piping.
The zone that Fig. 1 draws dotted line is conventional economizer system, the system that can combine in parallel, series connection or connection in series-parallel, and dotted line institute region can be not merely economizer surface, also can comprise header and pipeline.
The first bypass duct 5 flow processs start from feedwater piping 4, flow process is got back to economizer exit pipeline 8, actual flow process is not limited to this, the approach of drawing can be feedwater piping 4, also can be economizer import header 1, flow process can be got back to economizer exit pipeline 8 after finishing, and also can get back to economizer exit header 3.
Trunk line control valve 6 and the first bypass valve 7 can be installed simultaneously, also one of them can only be installed.
This advantage of system is when realizing that former economizer system reduces the boiler export flue-gas temperature, improves the function of feed temperature, and can be as required suitable adjusting is controlled in certain scope it by the temperature of the fluid media (medium) in the container 13.
Can be parallel with the medium in the heat-transfer surface 11 by its flow direction of temperature control medium in the bypass temperature control device 9, also can be vertical, it can flow with direction as shown, also can flow with the direction as shown rightabout.
System Working Principle:
Carry out in the situation of temperature adjustment not needing, the first bypass valve 7 is closed, do not have flow to pass through in the first bypass duct, bypass temperature control device 9 is not worked, and is had a higher phenomenon of temperature by temperature control medium in the bypass temperature control device, in the time of need to carrying out adjustment, can make the work of bypass temperature control device by opening the first bypass valve 7, reduce by the temperature of temperature control medium, the first bypass valve 7 apertures larger, the speed of cooling is faster.Because the first bypass valve 7 has been shunted the flow that enters trunk line (namely entering economizer in the dotted line), therefore the economizer exit flue-gas temperature also can change.
Bypass temperature control device operation principle:
In the container in flowing through the bypass temperature control device need to be carried out adjustment by temperature control medium the time, it is temperature drift, need to lower the temperature, then the adjusting by control valve is so that there is water to flow through (being the medium that enters economizer originally) in the first bypass duct, water is by heat-transfer surface 11, and water flows being cooled off by temperature control medium in heat-transfer surface 11 outsides, the container 13 in heat-transfer surface 11.
Can enter by the aperture adjustment of control valve the flow of the water in the heat-transfer surface 11, thereby obtain desirable cooling-down effect.
Fig. 3 is that time and tide switches schematic diagram.Co-current flow and counter-current flow refers to the relative flow direction between working medium (steam, feedwater and air etc.) and the flue gas.When the flow direction of flue gas and working medium is identical, claim following current; When the flow direction of flue gas and working medium is opposite, claim adverse current.As shown in Figure 3, on the basis of Fig. 1, after the point of outlet header 3 and the first bypass duct, be provided with outlet conduit shut-off valve 14, behind control valve 6, draw the second bypass duct, the second bypass duct links to each other with pipeline valve 14 outlet conduit 8 afterwards, at the second bypass duct shut-off valve 15 is set.
Suppose that flue gas is to be flowed downward by the economizer exit place.During adverse current, open control valve 6 and shut-off valve 14, close shut-off valve 15, working medium flows into from economizer import header 1, flows out from the economizer exit header, and at this moment the flow direction of flue gas and working medium is opposite, is adverse current.During following current, control valve 6 and shut-off valve 14 are closed, and open control valve 7 and shut-off valve 15, working medium enters from outlet header, after the heating, flows out from the import header in heating surface 2, flow to outlet conduit 8 through behind the shut-off valve 15, at this moment the flow direction of flue gas and working medium is all following current mutually.
Therefore by the switching of these four valves, realize the switching of following current and adverse current.When the carbonated drink medium total amount that enters economizer is constant, can by the switching of co-current flow and counter-current flow, change the temperature of economizer exit flue gas.When the economizer adverse current, the heat transfer temperature and pressure are high, and caloric receptivity is large, and the flue-gas temperature of economizer exit is low; When the economizer following current, the heat transfer temperature and pressure are low, and it is little to recept the caloric, and the flue-gas temperature of economizer exit is high.
Claims (9)
1. station boiler economizer, comprise feedwater piping (4), import header (1), heat-transfer surface (2), outlet header (3) and outlet conduit (8), flue gas flows through outside heat-transfer surface feedwater is heated, it is characterized in that: between feedwater piping (4) and outlet conduit (8), be provided with the first bypass duct (5) that connects both, also be provided with bypass temperature control device (9) on described the first bypass duct (5).
2. station boiler economizer according to claim 1 is characterized in that:
Feedwater piping (4) is by threeway, divide two-way, one the road goes to the first bypass duct, and one the tunnel is the trunk line of going to heat-transfer surface (2), is provided with on the described trunk line on trunk line control valve (6) or the first bypass duct (5) and is provided with the first bypass valve (7).
3. station boiler economizer according to claim 2 is characterized in that:
Described bypass temperature control device (9) can be by the heat-transfer surface of flue gas.
4. station boiler economizer according to claim 2 is characterized in that:
Described threeway is solenoid directional control valve.
5. station boiler economizer according to claim 3 is characterized in that:
Described bypass temperature control device (9) comprises container (13), import header (10), heat-transfer surface (11) and outlet header (12); Container (13) flow through by the flue gas of temperature adjustment.
6. station boiler economizer according to claim 5 is characterized in that:
Behind the point of the first bypass duct and outlet conduit (8), a temperature measuring equipment is set, be used for the MEASUREMENT OF STEAM coolant-temperature gage, between the first bypass valve (7) and temperature measuring equipment, a feedback device is set, and so that when temperature low temperature temperature, the first bypass valve (7) aperture diminishes.
7. station boiler economizer according to claim 5 is characterized in that:
Outlet at container (13) arranges a temperature measuring equipment, be used for measuring flue-gas temperature, between the first bypass valve (7) and temperature measuring equipment, a feedback device is set, and so that when temperature low temperature temperature, the first bypass valve (7) aperture diminishes.
8. it is characterized in that according to claim 2 or 3 described station boiler economizers:
Also comprise a switching device, described switching device comprises: the control valve (6) on the control valve in the first bypass (7), the trunk line, the shut-off valve (14) on the outlet conduit, the shut-off valve (15) in the second bypass;
When the control valve on the trunk line, the shut-off valve on the outlet conduit are opened, when the shut-off valve in the control valve in the first bypass, the second bypass cuts out, the economizer counter-flow arrangement;
Shut-off valve in the control valve in the first bypass, the second bypass is opened, the control valve on the trunk line, when the shut-off valve on the outlet conduit cuts out, and the economizer following current is arranged.
9. station boiler economizer according to claim 8 is characterized in that:
At the economizer smoke outlet one temperature measuring equipment is set, is used for measuring flue-gas temperature, a feedback device is set between switching device and temperature measuring equipment, and so that when temperature low temperature temperature, switching device is carried out the switching of time and tide.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104700969A CN102913896A (en) | 2012-11-20 | 2012-11-20 | Coal economizer for power station boiler |
| PL409129A PL234394B1 (en) | 2012-11-20 | 2013-08-27 | Tankless water heater for the power boiler |
| PCT/CN2013/082334 WO2014079247A1 (en) | 2012-11-20 | 2013-08-27 | Power station boiler economizer |
| MYPI2014703864A MY186040A (en) | 2012-11-20 | 2013-08-27 | Utility boiler economizer |
| ZA2014/06662A ZA201406662B (en) | 2012-11-20 | 2014-09-11 | Utility boiler economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104700969A CN102913896A (en) | 2012-11-20 | 2012-11-20 | Coal economizer for power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102913896A true CN102913896A (en) | 2013-02-06 |
Family
ID=47612384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104700969A Pending CN102913896A (en) | 2012-11-20 | 2012-11-20 | Coal economizer for power station boiler |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN102913896A (en) |
| MY (1) | MY186040A (en) |
| PL (1) | PL234394B1 (en) |
| WO (1) | WO2014079247A1 (en) |
| ZA (1) | ZA201406662B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079247A1 (en) * | 2012-11-20 | 2014-05-30 | 上海锅炉厂有限公司 | Power station boiler economizer |
| CN103939885A (en) * | 2014-03-28 | 2014-07-23 | 上海发电设备成套设计研究院 | Feedwater replacement type economizer system for whole commissioning of denitration device |
| CN104482527A (en) * | 2014-12-10 | 2015-04-01 | 广东电网有限责任公司电力科学研究院 | Regulating system and method for regulating heat exchange area of heated surface of boiler coal economizer capable of ensuring SCR (selective catalytic reduction) safe smoke temperature |
| CN107990299A (en) * | 2017-10-25 | 2018-05-04 | 山西潞安煤基精细化学品有限公司 | A kind of water supply line for converting feedwater preheater |
| CN108397762A (en) * | 2018-06-04 | 2018-08-14 | 周舒丹 | A kind of system promoting economizer exit smoke temperature |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504477A (en) * | 2016-06-14 | 2017-12-22 | 天津华赛尔传热设备有限公司 | A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer |
| CN108592004A (en) * | 2018-06-26 | 2018-09-28 | 江苏太湖锅炉股份有限公司 | Economizer heat exchange regulating system |
| CN109084319B (en) * | 2018-08-01 | 2023-12-19 | 中国电建集团江西省电力设计院有限公司 | Flue gas recirculation system adopting two stages for heat exchange |
| CN108844058A (en) * | 2018-08-16 | 2018-11-20 | 杭州华电能源工程有限公司 | A kind of economizer heat water recirculation system and its working method suitable for subcritical drum boiler generating set |
| CN110500572A (en) * | 2019-09-02 | 2019-11-26 | 南通万达锅炉有限公司 | A kind of modular condensate heater |
| CN111256506A (en) * | 2020-03-30 | 2020-06-09 | 西安热工研究院有限公司 | Maintenance-free heat pipe type low-temperature economizer system convenient to assemble and disassemble and working method thereof |
| CN116734232B (en) * | 2023-06-16 | 2024-03-19 | 武汉光谷蓝焰新能源股份有限公司 | Three-return-stroke membrane wall biomass steam boiler system and temperature regulation and control method thereof |
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| US3910236A (en) * | 1974-10-10 | 1975-10-07 | Applied Eng Co | Economizer for steam boiler |
| JP2002364802A (en) * | 2001-06-12 | 2002-12-18 | Toshiba Corp | Exhaust heat recovery system |
| CN200940825Y (en) * | 2006-08-17 | 2007-08-29 | 中国船舶重工集团公司第七一一研究所 | Wall temperature adjustable heat pipe coal saving device |
| CN101074771A (en) * | 2006-05-09 | 2007-11-21 | 巴布考克及威尔考克斯公司 | Multi-channel fuel-saving device and method for temperature controlling used for selective catalystic reactor |
| CN101738137A (en) * | 2009-11-26 | 2010-06-16 | 上海大学 | Device and process for automatically cleaning heat exchanger and switching flow direction of heat exchanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913896A (en) * | 2012-11-20 | 2013-02-06 | 上海锅炉厂有限公司 | Coal economizer for power station boiler |
-
2012
- 2012-11-20 CN CN2012104700969A patent/CN102913896A/en active Pending
-
2013
- 2013-08-27 PL PL409129A patent/PL234394B1/en unknown
- 2013-08-27 WO PCT/CN2013/082334 patent/WO2014079247A1/en active Application Filing
- 2013-08-27 MY MYPI2014703864A patent/MY186040A/en unknown
-
2014
- 2014-09-11 ZA ZA2014/06662A patent/ZA201406662B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3910236A (en) * | 1974-10-10 | 1975-10-07 | Applied Eng Co | Economizer for steam boiler |
| JP2002364802A (en) * | 2001-06-12 | 2002-12-18 | Toshiba Corp | Exhaust heat recovery system |
| CN101074771A (en) * | 2006-05-09 | 2007-11-21 | 巴布考克及威尔考克斯公司 | Multi-channel fuel-saving device and method for temperature controlling used for selective catalystic reactor |
| CN200940825Y (en) * | 2006-08-17 | 2007-08-29 | 中国船舶重工集团公司第七一一研究所 | Wall temperature adjustable heat pipe coal saving device |
| CN101738137A (en) * | 2009-11-26 | 2010-06-16 | 上海大学 | Device and process for automatically cleaning heat exchanger and switching flow direction of heat exchanger |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079247A1 (en) * | 2012-11-20 | 2014-05-30 | 上海锅炉厂有限公司 | Power station boiler economizer |
| CN103939885A (en) * | 2014-03-28 | 2014-07-23 | 上海发电设备成套设计研究院 | Feedwater replacement type economizer system for whole commissioning of denitration device |
| CN103939885B (en) * | 2014-03-28 | 2016-03-09 | 上海发电设备成套设计研究院 | A kind of feedwater displaced type economizer system put into operation for denitration device whole process |
| CN104482527A (en) * | 2014-12-10 | 2015-04-01 | 广东电网有限责任公司电力科学研究院 | Regulating system and method for regulating heat exchange area of heated surface of boiler coal economizer capable of ensuring SCR (selective catalytic reduction) safe smoke temperature |
| CN104482527B (en) * | 2014-12-10 | 2016-06-08 | 广东电网有限责任公司电力科学研究院 | Ensure the adjustment system and method for the boiler economizer heating surface heat exchange area of SCR safe cigarette temperature |
| CN107990299A (en) * | 2017-10-25 | 2018-05-04 | 山西潞安煤基精细化学品有限公司 | A kind of water supply line for converting feedwater preheater |
| CN108397762A (en) * | 2018-06-04 | 2018-08-14 | 周舒丹 | A kind of system promoting economizer exit smoke temperature |
| CN108397762B (en) * | 2018-06-04 | 2023-10-31 | 周舒丹 | System for promote economizer export cigarette temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014079247A1 (en) | 2014-05-30 |
| ZA201406662B (en) | 2020-12-23 |
| PL234394B1 (en) | 2020-02-28 |
| MY186040A (en) | 2021-06-16 |
| PL409129A1 (en) | 2015-07-20 |
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Application publication date: 20130206 |