CN102235661B - Drainage connecting system and method for steam turbine regeneration system - Google Patents
Drainage connecting system and method for steam turbine regeneration system Download PDFInfo
- Publication number
- CN102235661B CN102235661B CN201010156467.7A CN201010156467A CN102235661B CN 102235661 B CN102235661 B CN 102235661B CN 201010156467 A CN201010156467 A CN 201010156467A CN 102235661 B CN102235661 B CN 102235661B
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- Prior art keywords
- heater
- drainage
- pump
- steam turbine
- hydrophobic
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Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000008929 regeneration Effects 0.000 title abstract 5
- 238000011069 regeneration method Methods 0.000 title abstract 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 28
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 18
- 230000001172 regenerating effect Effects 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- KEUKAQNPUBYCIC-UHFFFAOYSA-N ethaneperoxoic acid;hydrogen peroxide Chemical compound OO.CC(=O)OO KEUKAQNPUBYCIC-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a steam turbine regeneration system, and in particular relates to a drainage connecting system and a drainage connecting method for the steam turbine regeneration system. The drainage connecting system comprises a condenser, a condensate water pump, a boiler and a regeneration heater, and is characterized in that: a jet water mixer is arranged behind the regeneration heater; and a steam jet pump is arranged behind a last-stage high-pressure heater and is connected with a main water supply pipeline. The drainage connecting system achieves the effect of a mixed heater, but a boost pump is not used, so that the structure is simplified, and the heating temperature difference of cold and hot media is greatly reduced; the heat economy of the drainage connecting system is higher than that of a drainage pump system, but the equipment investment of the drainage connecting system is smaller than that of the drainage pump system; and compared with a system with a drainage cooler, the drainage connecting system has the advantages that: the drainage cooler is removed, so that the structure of the heater is simplified.
Description
Technical field
The present invention relates to a kind of Steam Turbine Regenerative System, particularly relate to a kind of drainage connection system for steam turbine regenerative system and method.
Background technology
Modern Thermal Power Station, in order to improve heat utilization rate, is generally used heat regenerative system in Steam Power Circulation, with extracted steam from turbine heating boiler, feeds water to reduce cold source energy.Back heating system is comprised of a plurality of heaters.Heating steam hydrophobic has different mode of connection between a plurality of heaters, and the different efficiency of mode of connection is not identical yet.Conventional mode has hydrophobic backflow step by step and two kinds of modes of drainage pump at present.Hydrophobic backflow is step by step hydrophobic mobile to the low heater of pressure from the high heater of pressure, at low-pressure heater, emits hydrophobic heat, so just reduces drawing gas of low-pressure heater, increased the cold source energy of steam turbine, reduced cycle efficieny.Drainage pump mode of connection is the heater of getting to elevated pressures by hydrophobic, can make like this efficiency improve, but every one-level will add a booster, has increased the complexity of system.Also increased power consumption, two kinds of modes are all undesirable, and using at present more is the pressure heater and drainage pump that refluxes step by step.In order to reduce the hydrophobic thermal discharge that refluxes step by step, in bleeder heater, install drain cooler additional.
These all systems all also do not reach thermodynamic (al) optimum boundary, also have further improved necessity.The boundary of thermodynamics optimum is to utilize contact(-type) heater to replace surface heater, and the heating temperature difference that makes cold and hot medium is zero.Contact(-type) heater fills booster after also needing every grade, has also increased the complexity of system.
Summary of the invention
The present invention is exactly in order to solve the problems of the technologies described above, and a kind of drainage connection system for steam turbine regenerative system and method are provided, and object is in order to reduce the heating temperature difference of cold and hot medium, simplied system structure.
In order to achieve the above object, the present invention is achieved through the following technical solutions:
A kind of drainage connection system for steam turbine regenerative system, it comprises condenser, condensate pump, boiler and bleeder heater, injecting type water-water jet is set after bleeder heater, after final stage high-pressure heater, steam jet pump is set, steam jet pump is connected with main feed line.
On described condensate pump, variable-frequency power sources is installed.
Described injecting type water-water jet is arranged on 1.2-2.5m place, bleeder heater delivery port below.
The hydrophobic linking method of a kind of Steam Turbine Regenerative System, injecting type water-water jet is set after bleeder heater, utilize ejector mixing by hydrophobic supercharging step by step, by the hydrophobic oxygen-eliminating device of sending into of low-pressure heater, high-pressure heater is hydrophobic to boost step by step with injecting type water-water jet, after final stage high-pressure heater, with steam jet pump, sends into main feed line.
Advantage of the present invention and effect are as follows:
The present invention makes the link of draining system reach the effect of contact(-type) heater, but without booster, simplifies the structure, and greatly reduces the heating temperature difference of cold and hot medium.Heat-economy of the present invention is higher than drainage pump system, but equipment investment is lower than drainage pump system.Than having removed drain cooler with the system of drain cooler, simplified the structure of heater.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing drainage connection system for steam turbine regenerative system.
Fig. 2 is the structural representation of drainage connection system for steam turbine regenerative system of the present invention.
In figure, 1, condenser, 2, condensate pump, 3, boiler, 4, bleeder heater, 5, injecting type water-water jet, 6, steam jet pump, 7, oxygen-eliminating device, 8, feed pump.
The specific embodiment
Face is described in further details the present invention by reference to the accompanying drawings, but protection scope of the present invention is not limit by embodiment.
As shown in Figure 1, a kind of drainage connection system for steam turbine regenerative system of the present invention, its structure is as follows: it comprises condenser 1, condensate pump 2, boiler 3, bleeder heater 4, oxygen-eliminating device 7 and feed pump 8, injecting type water-water jet 5 is set after bleeder heater 4, steam jet pump 6 is set after final stage high-pressure heater, and steam jet pump 6 is connected with main feed line.
The hydrophobic linking method of a kind of Steam Turbine Regenerative System of the present invention, in order further to improve the efficiency of draining system, an injecting type water-water jet is set after each bleeder heater, utilize ejector mixing by hydrophobic supercharging step by step, by the hydrophobic oxygen-eliminating device of sending into of low-pressure heater, high-pressure heater is hydrophobic to boost step by step with injecting type water-water jet, after final stage high-pressure heater, with steam jet pump, sends into main feed line.
Innovative point of the present invention is as follows:
The present invention is at injecting type water-water jet 5 of the rear installation of each bleeder heater 4.With the hydrophobic next stage heater (heater that pressure is higher) of sending into that condensate water is used as power in injection heater, in next stage heater, be heated.In next stage heater, hydrophobic being heated is directly to heat with steam, and hydrophobic temperature can improve, and can raise than temperature in main condensate pipeline, so heat-economy increases than drainage pump mode by the part condensate water being used as power.
The stability of steam jet heat exchanger work is more responsive to operating mode, in order to guarantee that it can steady operation when the steam turbine working conditions change, tackles its operating mode and controls.When steam turbine working conditions change, the outlet pressure of condensate pump changes, and another is that the hydrophobic amount of bleeder heater also changes, and bleeder heater is all equipped with water-level control apparatus at present, and the variation of hydrophobic amount is realized by water-level control apparatus.The hydrophobic amount of each bleeder heater is controlled with water level, and the pressure of condensate pump and feed pump is controlled with rotating speed.
As the condensing capacity of power, should control and remain unchanged, in order to keep condensing capacity constant, should keep condensate pump outlet pressure constant, condensate pump can be filled to variable-frequency power sources, realize frequency control, keep exit of pump pressure constant.In order to make injecting type water-water jet that cavitation not occur, injecting type water-water jet can be arranged on to 1.2-2.5m place, below, the bleeder heater outlet mouth of a river, when best, be arranged on 1.5m place.Make injecting type water admixing device water sucking mouth keep certain net positive suction head.
Before low-pressure heater afterbody oxygen-eliminating device, available whole masters are to the hydrophobic oxygen-eliminating device of sending into of water jet.
In the end one-level high-pressure heater is hydrophobic, with steam jet pump, boiler is sent into in the hydrophobic service main of being incorporated to road, and the driving steam of steam jet pump is the steam that one-level is drawn gas.
According to the situation of unit, also can after part bleeder heater, arrange and add injecting type water-water jet, for example, can arrange at interval, namely after a bleeder heater, arrange one and add injecting type water-water jet.
Injecting type water-water jet 5 of the present invention and steam jet pump 6 are existing product.
Claims (4)
1. a drainage connection system for steam turbine regenerative system, it comprises condenser, condensate pump, boiler and bleeder heater, it is characterized in that arranging injecting type water-water jet after bleeder heater, after final stage high-pressure heater, steam jet pump is set, steam jet pump is connected with main feed line.
2. drainage connection system for steam turbine regenerative system according to claim 1, is characterized in that, on described condensate pump, variable-frequency power sources is installed.
3. drainage connection system for steam turbine regenerative system according to claim 1, is characterized in that described injecting type water-water jet is arranged on 1.2-2.5m place, bleeder heater delivery port below.
4. the hydrophobic linking method of Steam Turbine Regenerative System, it is characterized in that arranging injecting type water-water jet after bleeder heater, utilize ejector mixing by hydrophobic supercharging step by step, by the hydrophobic oxygen-eliminating device of sending into of low-pressure heater, high-pressure heater is hydrophobic to boost step by step with injecting type water-water jet, after final stage high-pressure heater, with steam jet pump, sends into main feed line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010156467.7A CN102235661B (en) | 2010-04-27 | 2010-04-27 | Drainage connecting system and method for steam turbine regeneration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010156467.7A CN102235661B (en) | 2010-04-27 | 2010-04-27 | Drainage connecting system and method for steam turbine regeneration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102235661A CN102235661A (en) | 2011-11-09 |
| CN102235661B true CN102235661B (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010156467.7A Expired - Fee Related CN102235661B (en) | 2010-04-27 | 2010-04-27 | Drainage connecting system and method for steam turbine regeneration system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537935B (en) * | 2012-02-28 | 2013-08-14 | 西安交通大学 | Heat regenerative system adopting jet-type heat pumps |
| CN203395908U (en) * | 2013-04-19 | 2014-01-15 | 冯伟忠 | Improved water supply, heat regeneration and water drainage system with medium-pressure heaters and water drainage pump |
| CN112818516B (en) * | 2021-01-06 | 2024-08-20 | 中国神华能源股份有限公司国华电力分公司 | Drainage optimization method for heat regeneration system of full-high-position steam turbine generator unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1344918A1 (en) * | 1985-05-24 | 1987-10-15 | Предприятие П/Я А-1469 | Steam heat-utilising circuit of combination power plant |
| CN2581928Y (en) * | 2002-09-18 | 2003-10-22 | 赵永民 | Adjustable water mixer |
| CN2766213Y (en) * | 2005-01-12 | 2006-03-22 | 马古柏 | Water mixing and jetting type heat exchanger |
| CN100504160C (en) * | 2007-03-26 | 2009-06-24 | 上海喆能电力工程技术有限公司 | Waste heat power generation system for a dry process cement production line |
| CN101131234A (en) * | 2007-09-05 | 2008-02-27 | 李福生 | Waste-heat recovery technology for turbine exhaust steam in electric power plant |
| CN101260815B (en) * | 2008-04-24 | 2010-06-02 | 华北电力大学 | Hybrid thermal power generation system for coal-fired boilers assisted by parabolic trough solar collectors |
| CN201652319U (en) * | 2010-04-27 | 2010-11-24 | 王汝武 | Drainage connection system for steam turbine regenerative system |
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- 2010-04-27 CN CN201010156467.7A patent/CN102235661B/en not_active Expired - Fee Related
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| CN102235661A (en) | 2011-11-09 |
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