CN204962711U - Supercritical unit or super supercritical unit do not have oxygen -eliminating device heat regenerative system - Google Patents
Supercritical unit or super supercritical unit do not have oxygen -eliminating device heat regenerative system Download PDFInfo
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- CN204962711U CN204962711U CN201520622956.5U CN201520622956U CN204962711U CN 204962711 U CN204962711 U CN 204962711U CN 201520622956 U CN201520622956 U CN 201520622956U CN 204962711 U CN204962711 U CN 204962711U
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Abstract
The utility model relates to a supercritical unit or super supercritical unit do not have oxygen -eliminating device heat regenerative system, the pipeline and the valve that are connected between steam turbine, condenser, condensate pump, low pressure feed water heater, high pressure feed water heater, water -feeding pump and each equipment are equipped with the chemistry and add the oxygen device on the condensate water pipeline to the oxygen content of aquatic is given in control. Because when this type supercritical unit or super supercritical unit heat regenerative system normal operating, the oxygen content of giving the aquatic chemistry on by the condensate water pipeline adds the oxygen device to be controlled, and it is unnecessary that the deoxidization function of original heat regenerative system becomes, and the setting of oxygen -eliminating device is cancelled in the event, can reduce the cost of heating power thermal power plant engineering and the economic performance of improvement unit.
Description
1. technical field
The utility model relates to a kind of supercritical unit or extra-supercritical unit without oxygen-eliminating device heat regenerative system.
2. background technology
In the production procedure of conventional heat generating, take water as condensate system and the water supply system that working medium enters thermodynamic cycle, can be dissolved with a small amount of oxygen in working medium, this oxygen is under the high temperature conditions to the oxide etch of boiler feedwater pipeline, boiler heating surface and heat exchanger.
In the prior art, for eliminating the incondensable gases such as the oxygen that dissolves in condensate water and water supply system, in circulation system, being generally designed with thermal de-aeration and chemical deoxidization apparatus, ensure that the Steam-water Quality of circulation system.
With thermal de-aeration, general employing to be arranged between low pressure condensate water system and high-pressure feed water system oxygen-eliminating device to complete deoxygenation function.Oxygen-eliminating device adopts contact(-type) heater, utilize extracted steam from turbine that boiler feedwater is heated to the saturation temperature under relevant pressure, like this, the partial pressure of water vapour will close to the total pressure on the water surface, along with the continuous discharge of gas, on the water surface, the partial pressure of various gas will level off to zero, and the gases such as the oxygen be dissolved in the water will be overflowed and be removed from water.
Along with thermal power generation technology develops to the aspect such as Large Copacity, high parameter, after particularly thermal parameter enters overcritical and ultra supercritical, research finds that the deoxygenation treatment process of original feedwater exists flowing accelerated corrosion, the tri-iron tetroxide short texture that metal erosion generates under this reproducibility environment, cannot make metal enter passivation region.By new Feedwater Oxygenated Treatment, make the reproducibility environmental transformation of feedwater deaeration be oxidative environment, original tri-iron tetroxide film is become fine and close di-iron trioxide diaphragm, the generation of pipeline and equipment flowing accelerated corrosion can be suppressed.
After supercritical unit or extra-supercritical unit adopt feed water oxygenation technology, the deoxygenation function of the oxygen-eliminating device of originally heat regenerative system standard configuration weakens and even becomes unnecessary.And due to the existence of oxygen-eliminating device in original heat regenerative system, condensate pump type selecting needs employing high-lift, to overcome the on-way resistance of condensate line to oxygen-eliminating device.Feed pump needs to increase fore pump for preventing cavitation erosion simultaneously, and in order to ensure fore pump safe operation, oxygen-eliminating device high-orderly must arrange to there is larger energy loss.A high position for oxygen-eliminating device arranges the civil engineering cost adding Thermal Power Station.
3. summary of the invention
The utility model provide a kind of supercritical unit or extra-supercritical unit without oxygen-eliminating device heat regenerative system; the oxygen-eliminating device of original heat regenerative system routine configuration can be cancelled; when Turbo-generator Set is normally run; the oxygen content in feedwater is controlled by the chemical aeration device that condensing water conduit is arranged; thus reach the di-iron trioxide diaphragm forming densification, suppress the generation of pipeline and equipment flowing accelerated corrosion.
For this reason, the supercritical unit that the utility model proposes or extra-supercritical unit without oxygen-eliminating device heat regenerative system, comprise steam turbine, condenser, condensate pump, low-pressure heater, high-pressure heater, the pipeline be connected between feed pump and each equipment and valve, described steam turbine is provided with multichannel extraction line, described low-pressure heater is connected with condensate pump by condensing water conduit, described high-pressure heater is connected with feed pump by feedwater piping, it is characterized in that, oxygen content during unit normally runs in feedwater is controlled by the chemical aeration device on condensing water conduit.
In an embodiment of the present utility model, condenser internal placement has thermal de-aeration water tank.
In an embodiment of the present utility model, condensing water conduit is provided with chemical deoxidization device.
In an embodiment of the present utility model, feed pump prevents the pressure head cavitated from having described condensate pump to provide.
In an embodiment of the present utility model, Turbo-generator Set is supercritical unit.
In an embodiment of the present utility model, Turbo-generator Set is extra-supercritical unit.
The supercritical unit that the utility model proposes or extra-supercritical unit without oxygen-eliminating device heat regenerative system, comprising:
When Turbo-generator Set startup stage and when running lower than a generation load upper limit, reach deaerating effect by the deaerating plant on the thermal de-aeration water tank of condenser inside and condensate line; And
When running higher than a generation load upper limit during Turbo-generator Set is normally run, control the oxygen content in feedwater by the chemical aeration device that condensing water conduit is arranged.
Accompanying drawing explanation
Fig. 1 be the supercritical unit of embodiment 1 or extra-supercritical unit without oxygen-eliminating device heat regenerative system schematic diagram.
Fig. 2 be the supercritical unit of embodiment 2 or extra-supercritical unit without oxygen-eliminating device heat regenerative system schematic diagram.
4. detailed description of the invention
Embodiment 1, see Fig. 1.Present embodiments provide a kind of thermal power plant supercritical unit or extra-supercritical unit without oxygen-eliminating device heat regenerative system schematic diagram.In the present embodiment, Turbo-generator Set can comprise without oxygen-eliminating device heat regenerative system the pipeline and valve that are connected between steam turbine 10, condenser 12, condensate pump 13, low-pressure heater (1-6), high-pressure heater (7-8), feed pump 16 and each equipment.Steam turbine is provided with multichannel extraction line, and 6 low-pressure heaters are connected with condensate pump 13 by condensing water conduit successively, and 2 high-pressure heaters are connected with feed pump 16 by feedwater piping successively.The feature of the present embodiment is, condensing water conduit is provided with chemical aeration device 17, accurately can control the oxygen content in feeding water.
It is worthy of note, condenser 12 internal placement has thermal de-aeration water tank.
It is worthy of note, condensing water conduit is provided with chemical deoxidization device 14.
The supercritical unit that the utility model proposes or extra-supercritical unit without oxygen-eliminating device heat regenerative system, its device uses as follows:
When Turbo-generator Set startup stage and when running lower than a generation load upper limit, reach deaerating effect by the thermal de-aeration water tank of condenser 12 inside and chemical deoxidization device 14;
When running higher than a generation load upper limit during Turbo-generator Set is normally run, control the oxygen content in feedwater by the chemical aeration device 17 that condensing water conduit is arranged.
With an embodiment, the utility model is described again below, see Fig. 2, in the present embodiment, Turbo-generator Set can comprise without oxygen-eliminating device heat regenerative system the pipeline and valve that are connected between steam turbine 10, condenser 12, condensate pump 13, low-pressure heater (1-5), high-pressure heater (6-8), feed pump 16 and each equipment.Steam turbine is provided with multichannel extraction line, 5 low-pressure heaters are connected with condensate pump 13 by condensing water conduit successively, 2 high-pressure heaters are connected with feed pump 16 by feedwater piping successively, condensing water conduit is provided with chemical aeration device 17, accurately can control the oxygen content in feeding water.The feature that the present embodiment 2 is different from enforcement 1 is, low-pressure heater configures 5, and high-pressure heater configures 3.
In sum, supercritical unit or extra-supercritical unit adopt without after oxygen-eliminating device heat regenerative system, this device is compared with the mode being originally provided with oxygen-eliminating device, can reduce the on-way resistance of condensate line to oxygen-eliminating device, optimizes condensate pump type selecting and reduces condensate pump power consumption.Eliminate fore pump and oxygen-eliminating device simultaneously, save civil engineering cost, improve the economic performance of unit.
Claims (7)
1. the utility model relates to a kind of supercritical unit or extra-supercritical unit without oxygen-eliminating device heat regenerative system, comprise steam turbine, condenser, condensate pump, low-pressure heater, high-pressure heater, the pipeline be connected between feed pump and each equipment and valve, described steam turbine is provided with multichannel extraction line, described low-pressure heater is connected with condensate pump by condensing water conduit, described high-pressure heater is connected with feed pump by feedwater piping, it is characterized in that, oxygen content during unit normally runs in feedwater is controlled by the chemical aeration device on condensing water conduit.
2. supercritical unit according to claim 1 or extra-supercritical unit are without oxygen-eliminating device heat regenerative system, it is characterized in that, described condenser internal placement has thermal de-aeration water tank.
3. supercritical unit according to claim 1 or extra-supercritical unit are without oxygen-eliminating device heat regenerative system, it is characterized in that, described condensing water conduit are provided with chemical deoxidization device.
4. supercritical unit according to claim 1 or extra-supercritical unit are without oxygen-eliminating device heat regenerative system, it is characterized in that, described feed pump prevents the pressure head cavitated from being provided by described condensate pump.
5. supercritical unit according to claim 1 or extra-supercritical unit are without oxygen-eliminating device heat regenerative system, it is characterized in that, described Turbo-generator Set is supercritical unit.
6. supercritical unit according to claim 1 or extra-supercritical unit are without oxygen-eliminating device heat regenerative system, it is characterized in that, described Turbo-generator Set is extra-supercritical unit.
7. the supercritical unit according to any one of claim 2-6 or extra-supercritical unit, without oxygen-eliminating device heat regenerative system, comprising:
When described Turbo-generator Set starts and run lower than a generation load upper limit, reach deaerating effect by the deaerating plant on the thermal de-aeration water tank of condenser inside and condensate line;
Normally run when described Turbo-generator Set and prescribe a time limit higher than on a generation load, control the oxygen content in feedwater by the chemical aeration device that condensing water conduit is arranged.
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| CN201520622956.5U CN204962711U (en) | 2015-08-13 | 2015-08-13 | Supercritical unit or super supercritical unit do not have oxygen -eliminating device heat regenerative system |
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| CN201520622956.5U CN204962711U (en) | 2015-08-13 | 2015-08-13 | Supercritical unit or super supercritical unit do not have oxygen -eliminating device heat regenerative system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927965A (en) * | 2016-06-22 | 2016-09-07 | 西安热工研究院有限公司 | Wide-load regenerative system and operating method thereof |
| CN106247312A (en) * | 2016-08-30 | 2016-12-21 | 山东电力工程咨询院有限公司 | A kind of extra-supercritical unit double reheat two-shipper backheat thermodynamic system without deaerator |
| CN106382620A (en) * | 2016-08-30 | 2017-02-08 | 山东电力工程咨询院有限公司 | Low-pressure water supply system for steam extraction and backheating of power station unit |
| CN106988807A (en) * | 2017-03-22 | 2017-07-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Turbo-generator Set, duty control method and the primary frequency modulation method of extraction regulation |
| CN108592005A (en) * | 2018-05-25 | 2018-09-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Without deaerator feedwater unit and heat energy system |
| CN109960289A (en) * | 2019-03-15 | 2019-07-02 | 广东核电合营有限公司 | The control method and system of condensed water oxygen content |
| CN110030547A (en) * | 2019-05-13 | 2019-07-19 | 华润电力（沧州运东）有限公司 | Once-through Boiler thermodynamic system without deaerator and its oxygen content control method |
| CN113339779A (en) * | 2021-04-21 | 2021-09-03 | 华能国际电力股份有限公司井冈山电厂 | Feed water treatment method for supercritical generator set or supercritical generator set boiler |
-
2015
- 2015-08-13 CN CN201520622956.5U patent/CN204962711U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927965A (en) * | 2016-06-22 | 2016-09-07 | 西安热工研究院有限公司 | Wide-load regenerative system and operating method thereof |
| CN105927965B (en) * | 2016-06-22 | 2018-01-16 | 西安热工研究院有限公司 | A kind of wide load heat regenerative system and method for work |
| CN106247312A (en) * | 2016-08-30 | 2016-12-21 | 山东电力工程咨询院有限公司 | A kind of extra-supercritical unit double reheat two-shipper backheat thermodynamic system without deaerator |
| CN106382620A (en) * | 2016-08-30 | 2017-02-08 | 山东电力工程咨询院有限公司 | Low-pressure water supply system for steam extraction and backheating of power station unit |
| CN106988807A (en) * | 2017-03-22 | 2017-07-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Turbo-generator Set, duty control method and the primary frequency modulation method of extraction regulation |
| CN106988807B (en) * | 2017-03-22 | 2019-08-20 | 中国能源建设集团广东省电力设计研究院有限公司 | Turbo-generator Set, duty control method and the primary frequency modulation method of extraction regulation |
| CN108592005A (en) * | 2018-05-25 | 2018-09-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Without deaerator feedwater unit and heat energy system |
| CN109960289A (en) * | 2019-03-15 | 2019-07-02 | 广东核电合营有限公司 | The control method and system of condensed water oxygen content |
| CN109960289B (en) * | 2019-03-15 | 2022-03-01 | 广东核电合营有限公司 | Method and system for controlling oxygen content of condensed water |
| CN110030547A (en) * | 2019-05-13 | 2019-07-19 | 华润电力（沧州运东）有限公司 | Once-through Boiler thermodynamic system without deaerator and its oxygen content control method |
| CN113339779A (en) * | 2021-04-21 | 2021-09-03 | 华能国际电力股份有限公司井冈山电厂 | Feed water treatment method for supercritical generator set or supercritical generator set boiler |
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