CN202012939U - Drainage system of boiler air heater of heat-engine plant - Google Patents
Drainage system of boiler air heater of heat-engine plant Download PDFInfo
- Publication number
- CN202012939U CN202012939U CN2011200107481U CN201120010748U CN202012939U CN 202012939 U CN202012939 U CN 202012939U CN 2011200107481 U CN2011200107481 U CN 2011200107481U CN 201120010748 U CN201120010748 U CN 201120010748U CN 202012939 U CN202012939 U CN 202012939U
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- China
- Prior art keywords
- air heater
- heat
- condenser
- water
- steam air
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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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- 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
The utility model discloses a drainage system of a boiler air heater of a heat-engine plant. The drainage system comprises a boiler air heater and a drainage regulating device which is connected therewith; an air heater drainage waste heat recycling device is arranged between the drainage regulating device and a condenser. The drainage system of the boiler air heater of the heat-engine plant disclosed by the utility model employs a technical scheme which, before drained water of the air heater enters the condenser, firstly recycles effective heat energies of the drained water by using a raw water heater and then enables cooled drained water of the air heater to return the condenser, so that consumption of steams for heating raw water is reduced by heating the raw water and saved steam can generate power externally; or consumption of coals is reduced in a condition of fixed generated energies, so thermal economical efficiency of the heat-engine plant is increased. In comparison with a direct-return condenser system, the system is only added with a first-level water-water heat exchange (a waste heat recycling device of drained water of the air heater), however, reliability of the system is equal to that of the direct-return condenser system, and thermal efficiency of a machine set of the proposal is almost 1% higher than that of the direct-return condenser system proposal.
Description
Technical field
The utility model relates to a kind of draining system that is used for the power plant boiler steam air heater.
Background technology
Steam air heater is arranged in the air preheater import air channel in the used steam generator system of thermal power plant, utilizes drawing gas of steam turbine that air is carried out preheating, can improve the tube wall temperature of heated surface at the end of boiler, effectively prevents cold end corrosion and stifled ash.When adopting steam air heater,, need the hydrophobic of steam air heater reclaimed for reducing the loss of working medium and heat.The at present domestic mode that generally adopts for drainage pump with hydrophobic certain the one-level low-pressure heater that is delivered to of steam air heater, its exemplary configurations is " drainage pump → oxygen-eliminating device " scheme, sees accompanying drawing 1.This scheme need be provided with equipment such as lower water box, drainage pump, water level transmitter, regulon and recirculation control valve, because control logic complexity, equipment work under bad environment, faults such as water level control is malfunctioning, drainage pump cavitation, steam air heater leakage often take place, at a puss have to be with hydrophobic to the trench discharging even the steam air heater of stopping using, cause the loss of working medium and heat, adopt the scheme system reliability of " drainage pump → oxygen-eliminating device " lower, the workload of repair and maintenance is bigger.
Also there is employing " automatic steam trap (or drain regulating valve) → condenser " the hydrophobic improvement project of steam air heater in some power plant at present, sees accompanying drawing 2,3.The characteristics of this scheme are to have replaced hydrophobic equipment such as drainage pump with automatic steam trap (or drain regulating valve), and the hydrophobic oxygen-eliminating device that goes is changed condenser, make system be simplified, improve the reliability of system.But this scheme shortcoming is that this part hydrophobic energy is recycled water and takes away behind hydrophobic time condenser of steam air heater, causes energy loss, thereby has reduced the full factory heat-economy of power plant.As calculated, than returning the oxygen-eliminating device scheme, the generatine set heat efficiency of this scheme will descend about 0.4%.
Summary of the invention
The purpose of this utility model is that a kind of reliability that can guarantee draining system for steam air heater of utility will be provided, and can improve the power plant boiler draining system for steam air heater of utility of power plant's heat-economy again.
The purpose of this utility model is achieved in that a kind of power plant boiler draining system for steam air heater of utility, comprises the boiler steam air heater, and the hydrophobic adjusting device that is connected with the boiler steam air heater is provided with the hydrophobic waste-heat recovery device of steam air heater between hydrophobic adjusting device and condenser.Described hydrophobic adjusting device is automatic steam trap or drain regulating valve.The hydrophobic waste-heat recovery device of described steam air heater adopts the unboiled water heater.
The power plant boiler draining system for steam air heater of utility that the utility model provides, since taked with steam air heater hydrophobic remove condenser before, by the unboiled water heater its efficient heat is reclaimed earlier, the hydrophobic technical scheme of returning condenser at last again of steam air heater after being cooled, can reduce the steam consumption quantity that is used to heat unboiled water by the heating unboiled water, how the steam of saving can externally generate electricity; Perhaps under the certain situation of generating, can reduce the consumption of coal, thereby improve the heat-economy of full factory.In addition because the unboiled water temperature is lower, the steam air heater drain temperature can be cooled to the temperature also lower than condenser condensed water saturation temperature, behind hydrophobic time condenser of the steam air heater of low temperature, pass through other heat hydrophobic or steam discharge of absorption, thereby can reduce the thermal efficiency of cold junction loss more raising unit of condenser.Native system has only increased one-level water water-to-water heat exchanger (being the unboiled water heater) than directly returning condenser system, so its reliability is with directly to return condenser system suitable, but the generatine set heat efficiency of this scheme compares and directly returns condenser scheme height nearly 1%.
With the subcritical heat supply unit of certain engineering 330MW is example, adopts to set and returns condenser after the steam air heater drain temperature reduces by 10 degree.As calculated, every about 3.3MW of the callable heat of unit like this, can save the about 4t/h of auxiliary steam amount that is used to heat unboiled water, can reduce gross coal consumption rate thus is 2g/kwh approximately, save about 2.5 kilotons of mark coal (utilizing the time to consider) year by 5 months promptly 3600 hours, the income of bringing of economizing on coal is 1,400,000 yuan (the mark coal price is by 570 yuan of considerations) approximately, and two units are exactly 2,800,000 yuan.Table 1 is the economic comparison of the utility model with existing other two kinds of draining system for steam air heater of utility:
Table 1
| ? | Return the oxygen-eliminating device scheme | Directly return the condenser scheme | This programme |
| Coal consumption (g/kw.h) | Benchmark | +0.9 | -1.0 |
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structure principle chart that adopts " drainage pump → oxygen-eliminating device " scheme.
Fig. 2 and Fig. 3 are the structure principle charts that adopts " automatic steam trap → condenser " scheme.
Fig. 4 and Fig. 5 are structure principle charts of the present utility model.
Among the figure, 1, the boiler steam air heater, 2, hydrophobic adjusting device, 3, condenser, 4, the hydrophobic waste-heat recovery device of steam air heater, 5, drain tank, 6, drainage pump, 7, oxygen-eliminating device.
The specific embodiment
As Fig. 4, shown in 5, the technical solution of the utility model is as follows: a kind of power plant boiler draining system for steam air heater of utility comprises boiler steam air heater 1, the hydrophobic adjusting device 2 that is connected with boiler steam air heater 1 is provided with the hydrophobic waste-heat recovery device 4 of steam air heater between hydrophobic adjusting device 2 and condenser 3.Hydrophobic waste-heat recovery device 4 adopts the unboiled water heater.Described hydrophobic adjusting device 2 is automatic steam trap or drain regulating valve.
Operation principle of the present utility model is as follows:
At first 1 heating steam of boiler steam air heater in the boiler steam air heater 1 be cooled into by heat exchange hydrophobic, hydrophobic again by hydrophobic adjusting device 2, be sent to the hydrophobic waste-heat recovery device 4 of steam air heater, the hydrophobic waste-heat recovery device 4 of steam air heater is the unboiled water heater the utility model employing, steam air heater is hydrophobic in the hydrophobic waste-heat recovery device 4 of steam air heater is cooled to than the also low temperature of condenser 3 condensate water saturation temperatures, get back to condenser 3 at last, finish hydrophobic energy recovery of whole steam air heater and working medium and reclaim.
Claims (3)
1. power plant boiler draining system for steam air heater of utility, comprise boiler steam air heater (1), the hydrophobic adjusting device (2) that is connected with boiler steam air heater (1) is characterized in that: be provided with the hydrophobic waste-heat recovery device of steam air heater (4) between hydrophobic adjusting device (2) and condenser (3).
2. power plant boiler draining system for steam air heater of utility according to claim 1 is characterized in that: described hydrophobic adjusting device (2) is automatic steam trap or drain regulating valve.
3. power plant boiler draining system for steam air heater of utility according to claim 1 is characterized in that: the hydrophobic waste-heat recovery device of described steam air heater (4) adopts the unboiled water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200107481U CN202012939U (en) | 2011-01-14 | 2011-01-14 | Drainage system of boiler air heater of heat-engine plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200107481U CN202012939U (en) | 2011-01-14 | 2011-01-14 | Drainage system of boiler air heater of heat-engine plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202012939U true CN202012939U (en) | 2011-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200107481U Expired - Fee Related CN202012939U (en) | 2011-01-14 | 2011-01-14 | Drainage system of boiler air heater of heat-engine plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN202012939U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953615A (en) * | 2016-05-11 | 2016-09-21 | 中国能源建设集团广东省电力设计研究院有限公司 | Two-channel heat exchange system and air temperature adjusting method thereof |
| CN107062298A (en) * | 2017-05-26 | 2017-08-18 | 华北电力大学 | The system and heat exchange module of vapor and its heat in a kind of embrane method recovered flue gas |
| CN109611814A (en) * | 2018-12-29 | 2019-04-12 | 湖南鸿远高压阀门有限公司 | The measurement method and measuring system of pipe valve arrangement draining system heat-energy losses |
| CN109681904A (en) * | 2019-01-29 | 2019-04-26 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of rotary air heater and its adjusting method of hydrophobic side automatic adjustment |
-
2011
- 2011-01-14 CN CN2011200107481U patent/CN202012939U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953615A (en) * | 2016-05-11 | 2016-09-21 | 中国能源建设集团广东省电力设计研究院有限公司 | Two-channel heat exchange system and air temperature adjusting method thereof |
| CN107062298A (en) * | 2017-05-26 | 2017-08-18 | 华北电力大学 | The system and heat exchange module of vapor and its heat in a kind of embrane method recovered flue gas |
| CN109611814A (en) * | 2018-12-29 | 2019-04-12 | 湖南鸿远高压阀门有限公司 | The measurement method and measuring system of pipe valve arrangement draining system heat-energy losses |
| CN109611814B (en) * | 2018-12-29 | 2019-12-20 | 湖南鸿远高压阀门有限公司 | Measuring method and measuring system for heat energy loss of pipe valve arrangement drainage system |
| CN109681904A (en) * | 2019-01-29 | 2019-04-26 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of rotary air heater and its adjusting method of hydrophobic side automatic adjustment |
| CN109681904B (en) * | 2019-01-29 | 2024-02-06 | 中国电力工程顾问集团西北电力设计院有限公司 | Rotary type heater with automatically-adjusted drainage side and adjusting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20180114 |