CN210088826U - Low-pressure economizer - Google Patents
Low-pressure economizer Download PDFInfo
- Publication number
- CN210088826U CN210088826U CN201920214785.0U CN201920214785U CN210088826U CN 210088826 U CN210088826 U CN 210088826U CN 201920214785 U CN201920214785 U CN 201920214785U CN 210088826 U CN210088826 U CN 210088826U
- Authority
- CN
- China
- Prior art keywords
- low
- economizer
- pressure
- pressure economizer
- low pressure
- 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.)
- Active
Links
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses a low pressure economizer, including the low pressure economizer, the condensate inlet fixedly connected with inlet tube of low pressure economizer, the inlet tube is kept away from the one end fixedly connected with low pressure backheat system of low pressure economizer, the outlet end fixedly connected with outlet pipe of low pressure economizer, the outlet pipe is kept away from the one end fixedly connected with oxygen-eliminating device of low pressure economizer, the export of low pressure backheat system pass through the connecting pipe with the oxygen-eliminating device links. Lead to the utility model discloses an application on steel mill superhigh pressure is reheat gas boiler once, effectively solve gas boiler and discharge fume the loss problem, utilize boiler flue gas waste heat heating steam turbine condensate water, improved the thermal efficiency of electricity generation, increased the generated energy, working medium and flue gas are against the current, have improved low pressure economizer heat transfer coefficient and have reduced heat transfer area, the low pressure economizer overall arrangement of being convenient for adopts imported working medium to be 90 ℃ condensate water, effectively avoids gas boiler flue gas low temperature acid dew corrosion problem.
Description
Technical Field
The utility model belongs to super high pressure is reheat gas boiler flue gas waste heat recovery economizer once, concretely relates to can reduce the low pressure economizer of steel enterprise gas boiler exhaust temperature.
Background
The smoke discharge loss of the boiler is a difficult problem of improving the boiler efficiency, the incomplete combustion loss of the gas-fired boiler can be ignored, the heat dissipation loss accounts for about 1%, and the smoke discharge loss of the gas-fired boiler accounts for about 99% of the heat loss of the boiler, so that the smoke discharge loss of the gas-fired boiler is particularly important for reducing the smoke discharge loss of the gas-fired boiler. At present, the smoke discharge loss can be reduced by methods of increasing the areas of an economizer and an air preheater and the like, but the measures are often limited by factors such as structure, space and the like. Therefore, the low-pressure economizer is arranged in the tail flue and has unique advantages as a flue gas waste heat recovery device, the exhaust gas temperature can be reduced by 20-30 ℃, and the energy-saving effect is obvious. Meanwhile, the phenomenon of low-temperature corrosion caused by unstable tail smoke temperature due to load change is solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to prior art not enough, the utility model provides a one set of superhigh pressure is reheat coal gas boiler low pressure economizer once, as gas boiler flue gas waste heat recovery.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low pressure economizer, includes the low pressure economizer, the condensate water entrance fixedly connected with inlet tube of low pressure economizer, the inlet tube is kept away from the one end fixedly connected with low pressure backheat system of low pressure economizer, the play water end fixedly connected with outlet pipe of low pressure economizer, the outlet pipe is kept away from the one end fixedly connected with oxygen-eliminating device of low pressure economizer, the export of low pressure backheat system pass through the connecting pipe with the oxygen-eliminating device intercommunication.
The water inlet pipe is provided with a first electric isolating valve and an electric regulating valve;
and the water outlet pipe is provided with a second electric isolating valve and a manual regulating valve.
Preferably, the inner cavity of the first electric isolating valve and the inner cavity of the electric regulating valve are communicated with the inner cavity of the water inlet pipe, and the electric regulating valve is positioned on the right side of the first electric isolating valve.
Preferably, the inner cavity of the second electric isolating valve and the inner cavity of the manual regulating valve are communicated with the inner cavity of the water outlet pipe, and the manual regulating valve is positioned on the right side of the second electric isolating valve.
Preferably, the low-pressure regenerative system includes a first low-pressure heater, a second low-pressure heater, and a third low-pressure heater, an inlet end of the second low-pressure heater is communicated with an outlet end of the first low-pressure heater, and an outlet end of the second low-pressure heater is communicated with an inlet end of the third low-pressure heater.
Preferably, the low-pressure economizer comprises an economizer tube panel, a heat exchange tube bundle, an inlet header and an outlet header, wherein the inlet end of the heat exchange tube bundle is communicated with the inlet header, the outlet end of the heat exchange tube bundle is communicated with the outlet header, and the economizer tube panel is arranged on the heat exchange tube bundle.
Preferably, the low-pressure economizer is composed of an economizer tube bundle composed of ND steel spiral fin tubes, the transverse pitch is 80mm, a thermal resistor is arranged at a flue gas inlet and a flue gas outlet of the low-pressure economizer, and a thermal resistor is arranged at a condensed water inlet and a condensed water outlet of the low-pressure economizer.
Advantageous effects
The utility model provides a low pressure economizer. The method has the following beneficial effects:
1. the utility model discloses an application on steel mill superhigh pressure is reheat gas boiler once, effectively solve gas boiler and discharge fume the loss problem, utilize boiler flue gas waste heat heating steam turbine condensate water, improved the thermal efficiency of electricity generation, increased the generated energy, working medium and flue gas are against the current, have improved low pressure economizer heat transfer coefficient and have reduced heat transfer area, the low pressure economizer overall arrangement of being convenient for adopts imported working medium to be 90 ℃ condensate water, effectively avoids gas boiler flue gas low temperature acid dew corrosion problem.
2. The utility model discloses ND steel is chooseed for use to low temperature economizer material, the corrosion resistance of tubular product has been improved, low temperature economizer heat exchange tube adopts spiral fin pipe, horizontal pitch is 80mm, on furthest's reduction spiral fin pipe deposition basis, further improve the coefficient of heat transfer of low pressure economizer, set up automatic regulating apparatus at economizer condensate water entrance side, adjust the condensate water control temperature of discharging fume, make the boiler exhaust fume temperature move at suitable within range, prevent that the flue gas temperature from crossing low can corrode low temperature economizer and draught fan impeller.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
In the figure: 1 low-pressure economizer, 2 outlet pipes, 3 deaerators, 4 second electric isolating valves, 5 manual regulating valves, 6 water inlet pipes, 7 first electric isolating valves, 8 electric regulating valves, 9 third low-pressure heaters, 10 second low-pressure heaters and 11 first low-pressure heaters.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a technical solution: the utility model provides a low pressure economizer, includes low pressure economizer 1, and the condensate water entrance fixedly connected with inlet tube 6 of low pressure economizer 1, the one end fixedly connected with low pressure backheat system that low pressure economizer 1 was kept away from to inlet tube 6, and the play water end fixedly connected with outlet pipe 2 of low pressure economizer 1, the one end fixedly connected with oxygen-eliminating device 3 of low pressure economizer 1 is kept away from to outlet pipe 2, and the export of low pressure backheat system is passed through connecting pipe and 3 intercommunications of oxygen-eliminating device.
A first electric isolating valve 7 and an electric regulating valve 8 are arranged on the water inlet pipe 6; the first electrically operated isolating valve 7 and the electrically operated regulating valve 8 are capable of regulating the flow of the condensed water.
The water outlet pipe 2 is provided with a second electric isolating valve 4 and a manual regulating valve 5.
Specifically, the inner cavity of the first electric isolating valve 7 and the inner cavity of the electric regulating valve 8 are both communicated with the inner cavity of the water inlet pipe 6, and the electric regulating valve 8 is positioned on the right side of the first electric isolating valve 7.
Specifically, the inner cavity of the second electric isolation valve 4 and the inner cavity of the manual regulating valve 5 are both communicated with the inner cavity of the water outlet pipe 2, and the manual regulating valve 5 is located on the right side of the second electric isolation valve 4.
Specifically, the low-pressure regenerative system includes a first low-pressure heater 11, a second low-pressure heater 10 and a third low-pressure heater 9, an inlet end of the second low-pressure heater 10 is communicated with an outlet end of the first low-pressure heater 11, and an outlet end of the second low-pressure heater 10 is communicated with an inlet end of the third low-pressure heater 9.
Specifically, the low-pressure economizer 1 comprises an economizer tube panel, a heat exchange tube bundle, an inlet header and an outlet header, wherein the inlet end of the heat exchange tube bundle is communicated with the inlet header, the outlet end of the heat exchange tube bundle is communicated with the outlet header, and the economizer tube panel is arranged on the heat exchange tube bundle.
Specifically, the low-pressure economizer 1 is composed of an economizer tube bundle composed of ND steel spiral fin tubes, the transverse pitch is 80mm, a thermal resistor is arranged at a flue gas inlet and a flue gas outlet of the low-pressure economizer 1, and a thermal resistor is arranged at a condensed water inlet and a condensed water outlet of the low-pressure economizer 1. On the basis of reducing the dust deposition of the spiral finned tube to the maximum extent, the heat exchange coefficient of the low-pressure economizer 1 is further improved.
The working principle is as follows: when in use, the low-pressure economizer 1 is arranged behind a vertical shaft air preheater at the tail part of a boiler and is placed on a ventilation beam, the ventilation beam penetrates through a boiler wall and is supported on a boiler wall protection plate, the low-pressure economizer is arranged in a single-stage and in-line manner, and a working medium and smoke are in counter-flow. The condensed water of the steam turbine passes through the third low-pressure heater 9, the second low-pressure heater 10 and the first low-pressure heater 11 in sequence, the condensed water is heated to 90 ℃, all the condensed water is introduced to the boiler low-pressure economizer 1 and is heated to 130 ℃, and then the condensed water is sent to the deaerator 3. Under different working conditions, the purpose of reducing the exhaust gas temperature is achieved by changing the inlet flow of the low-pressure economizer 1 and controlling the outlet temperature of the working medium, and the outlet water temperature of the low-pressure economizer 1 is controlled to be lower than the saturation temperature under the corresponding pressure during operation.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A low-pressure economizer comprising a low-pressure economizer (1), characterized in that: a condensed water inlet (6) is fixedly connected to a condensed water inlet of the low-pressure economizer (1), one end, far away from the low-pressure economizer (1), of the water inlet (6) is fixedly connected with a low-pressure heat recovery system, a water outlet end of the low-pressure economizer (1) is fixedly connected with a water outlet pipe (2), one end, far away from the low-pressure economizer (1), of the water outlet pipe (2) is fixedly connected with a deaerator (3), and an outlet of the low-pressure heat recovery system is communicated with the deaerator (3) through a connecting pipe;
a first electric isolating valve (7) and an electric regulating valve (8) are arranged on the water inlet pipe (6);
and a second electric isolating valve (4) and a manual regulating valve (5) are arranged on the water outlet pipe (2).
2. A low-pressure economizer as claimed in claim 1, wherein: the inner cavity of the first electric isolating valve (7) and the inner cavity of the electric regulating valve (8) are communicated with the inner cavity of the water inlet pipe (6), and the electric regulating valve (8) is positioned on the right side of the first electric isolating valve (7).
3. A low-pressure economizer as claimed in claim 1, wherein: the inner cavity of the second electric isolating valve (4) and the inner cavity of the manual regulating valve (5) are communicated with the inner cavity of the water outlet pipe (2), and the manual regulating valve (5) is positioned on the right side of the second electric isolating valve (4).
4. A low-pressure economizer as claimed in claim 1, wherein: the low-pressure heat recovery system comprises a first low-pressure heater (11), a second low-pressure heater (10) and a third low-pressure heater (9), wherein the inlet end of the second low-pressure heater (10) is communicated with the outlet end of the first low-pressure heater (11), and the outlet end of the second low-pressure heater (10) is communicated with the inlet end of the third low-pressure heater (9).
5. A low-pressure economizer as claimed in claim 1, wherein: the low-pressure economizer (1) comprises an economizer tube panel, a heat exchange tube bundle, an inlet header and an outlet header, wherein the inlet end of the heat exchange tube bundle is communicated with the inlet header, the outlet end of the heat exchange tube bundle is communicated with the outlet header, and the economizer tube panel is arranged on the heat exchange tube bundle.
6. A low-pressure economizer as claimed in claim 1, wherein: the low-pressure economizer (1) is composed of an economizer tube bundle composed of ND steel spiral fin tubes, the transverse pitch is 80mm, a smoke inlet and a smoke outlet of the low-pressure economizer (1) are provided with thermal resistors, and a condensed water inlet and a condensed water outlet of the low-pressure economizer (1) are provided with thermal resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920214785.0U CN210088826U (en) | 2019-02-20 | 2019-02-20 | Low-pressure economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920214785.0U CN210088826U (en) | 2019-02-20 | 2019-02-20 | Low-pressure economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210088826U true CN210088826U (en) | 2020-02-18 |
Family
ID=69470831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920214785.0U Active CN210088826U (en) | 2019-02-20 | 2019-02-20 | Low-pressure economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210088826U (en) |
-
2019
- 2019-02-20 CN CN201920214785.0U patent/CN210088826U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102454980B (en) | Method for recycling flue gas waste heat of thermal power plant boiler | |
| CN102607010B (en) | Composite phase-change heat exchange system | |
| CN107687634A (en) | The denitration of boiler full load couples fume afterheat gradient utilization system | |
| CN111981465A (en) | Flue gas waste heat utilization system | |
| CN104006401A (en) | Power station boiler smoke waste heat deep recycling and emission reducing system | |
| CN206989172U (en) | The denitration of boiler full load couples fume afterheat gradient utilization system | |
| CN202791972U (en) | Boiler tail flue gas waste heat utilization system | |
| CN203771380U (en) | Condensation waste heat recovery steam boiler | |
| CN105841180A (en) | Horizontal type phase change smoke waste heat recovering and double-effect heating system and control method thereof | |
| CN100520268C (en) | Fume-fume hot pipe heater exchanger for fume desulphurization in heat-engine plant | |
| CN210088826U (en) | Low-pressure economizer | |
| CN205048411U (en) | Gas boiler | |
| CN206608968U (en) | A kind of power plant's heat reclaiming system | |
| CN201206829Y (en) | Liquid phase intermediate medium heat exchanging type heat exchanger | |
| CN202660525U (en) | Composite phase-change heat exchange system | |
| CN205939096U (en) | Send out power boiler flue gas, steam heat recovery utilizes device | |
| CN204962841U (en) | Energy -conserving anticorrosive type boiler low temperature waste heat from flue gas recovery unit | |
| CN205191617U (en) | Flue gas is thermal system again based on phase transition heat transfer and fluoroplastics technique | |
| CN211552560U (en) | Flue gas waste heat degree of depth recovery system | |
| CN204301104U (en) | Cigarette temperature and smoke waste heat utilization system fall in boiler for deeply | |
| CN107345656A (en) | A kind of steam raising plant using residual heat from boiler fume | |
| CN107062613A (en) | A kind of method that wall-hung boiler is changed condensing by on-condensing | |
| CN209196907U (en) | Air preheater mentions the association system of effect coupling low-grade flue gas heat recovery and utilization | |
| CN205782834U (en) | A kind of residual heat from boiler fume utilizes combining heating system | |
| CN205208538U (en) | Boiler waste heat adds hot water economizer system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |