CN101275738A - After heat power station heat system for performing vacuum deoxidization using steam turbine condenser - Google Patents
After heat power station heat system for performing vacuum deoxidization using steam turbine condenser Download PDFInfo
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- CN101275738A CN101275738A CNA2007100541500A CN200710054150A CN101275738A CN 101275738 A CN101275738 A CN 101275738A CN A2007100541500 A CNA2007100541500 A CN A2007100541500A CN 200710054150 A CN200710054150 A CN 200710054150A CN 101275738 A CN101275738 A CN 101275738A
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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
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Abstract
A waste heat power station thermodynamic system processing the vacuum deoxygenation with a steam turbine condensator is a vacuum deoxygenatiom system using the chemical deionization water inside a condensator (2) connected with a stream filling and condensing steam turbine (1) for entering an AQC waste heat boiler (13) and a SP waste heat boiler (12) for water supply, which can markedly raise the waste heat utilance. The condensed water of 41-36 degrees can enter the water heating zone of the water heat boiler, heat the condensed water higher than 170 degrees, and reduce the discharging temperature of the waste gas to 100 degrees or so, which reasonably increases the recovery waste heat utilance.
Description
Affiliated technical field:
The present invention relates to a kind of deaeration in condenser waste heat Power Plant Thermal System, especially a kind of steam turbine condenser that utilizes carries out deaeration in condenser waste heat Power Plant Thermal System.
Background technology:
1., National Development and Reform Committee requires the 3rd regulation of ten measures of industry energy conservation " waste heat that produces in the production process, overbottom pressure etc. to be reclaimed and utilization rationally ".Utilize the CDQ sensible heat to reclaim generating, the generating of State of Blast Furnace roof pressure difference as iron and steel enterprise, reclaim blast furnace, coke oven, coal gas of converter generating, new type nonaqueous cement production line kiln hood, kiln tail gas cogeneration etc.Energy-conserving and environment-protective, the theory of realization recycling economy, corresponding principles and policies are progressively formulated and are implemented.Numerous enterprises need be built the cogeneration station, and is in the ascendant.
2., utilize the waste heat boiler recovery waste heat, produce steam and promote the Turbo-generator Set generating, waste heat boiler and steam turbine are the visual plants in waste heat power station.For preventing that waste heat boiler heating surface fouling and steam borne impurities from causing the turbine blade fouling, thereby reduce the thermal efficiency, the moisturizing of waste heat boiler feedwater and boiler circuit needs to handle through chemical deionization (or softening).
Normal dissolved oxygen content is 9～14mg/L in the water, the boiler feedwater standard code, and the steam supply turbine must carry out deoxygenation with the boiler feedwater oxygen content≤0.05mg/L of vapour.
3., the boiler supply water deaerating method has: thermal de-aeration, chemical deoxidization, parsing deoxygenation and deaeration in condenser etc.
Thermal de-aeration needs steam pumping, is steam power plant's method commonly used, and does not generally adopt in the waste heat power station.Waste heat power station chemical deoxidization commonly used and deaeration in condenser.And the ubiquity deaerating effect is relatively poor, finds that through operation in several years boiler element metal forms shellfish shape oxygen corrosion hole, jeopardizes boiler safety.Trace it to its cause:
A, chemical deoxidization require coolant-temperature gage higher (about 70 ℃), require simultaneously to guarantee to be no less than 5 minutes reaction time, and require timely dosing.The chemical deoxidization expense is higher, and operating technology is had relatively high expectations.These require often to can not get guaranteeing in the waste heat power station.
B, deaeration in condenser are to utilize vacuum extractor, make to form negative pressure in the oxygen-eliminating device, and oxygen partial pressure is gone to zero, and water is removed the dissolved oxygen in the water in the low boiling state evaporation of relevant pressure.Vacuum means is equipped with water ejector and steam jet ejector.Water ejector system capital equipment has cyclic water tank, water pump, injector and pipeline etc.System complex increases power consumption.The above steam of 1.0MPa need be taken out by the steam jet ejector system, has reduced the cogeneration amount, and system is complicated.And operating technology is had relatively high expectations.
Summary of the invention:
The invention provides interior chemical deionization (or softening) water of a kind of condenser (3) that utilizes filling condensing turbine (1) to connect and enter the deaeration in condenser system of AQC waste heat boiler (13) and SP waste heat boiler (12) moisturizing.
Technical scheme provided by the invention is, the technological process of waste heat Steam-Water System in Power Plant is: the chemical deionization in the condenser (3) (or softening) water connects condensate pump (5) by pipeline and water tank (6) enters the economizer (14) that is arranged in AQC waste heat boiler (13) with water pump (7), being divided into two the tunnel then connects feed-regulating valve (8) by pipeline respectively and enters the AQC waste heat boiler drum (9) that is installed on the AQC waste heat boiler (13) and the SP waste heat boiler drum (11) on another work system SP waste heat boiler (12), be heated into superheated steam through inner loop, the superheated steam of two boilers connects by pipeline, in collection cylinder (10), compile, enter filling condensing turbine (1) by pipeline then and drive generator (2) generating, it is in the 0.007MPa condenser (3) that exhaust steam after the acting has connecting pipe to enter absolute pressure, being cooled off the condensed water that becomes is rapidly therein focused in the hot well (4), the condensed water water pump (5) that is condensed is squeezed into water tank (6) by pipeline, chemical deionization in the water tank (6) (or softening) water is squeezed into economizer (14) by pipeline through feed pump (7) again, finishes a circulation.For guaranteeing the water quality of water in waste heat boiler (9.11) stove, need dosing and blowdown in the stove, in addition, system also can leak, and all can cause the water of waste heat boiler (9.11) boiler circuit constantly to reduce.Need be to the moisturizing of cogeneration boiler circuit.Moisturizing not only needs chemical deionization (or softening) to handle, and also needs to remove the dissolved oxygen in the water, to prevent metal generation oxygen corrosion.Moisturizing mends in condenser (3).
2., for improving the cycle efficieny of power plant, can take to improve steam pressure and temperature, reduce the exhaust steam pressure of filling condensing turbine (1) simultaneously.General cogeneration steam parameter is elected 1.0～1.6MPa as, and 300～350 ℃, the exhaust steam parameter that vapour condensing turbine (1) steam discharge parameter promptly enters in the condenser is elected 0.008～0.006MPa as, and corresponding saturation temperature is 41.16 ℃～35.82 ℃.The condenser (3) of filling condensing turbine (1) is the highest equipment of vacuum in this waste heat Power Plant Thermal System.The water of mending in the condenser (3) in the spray mode only is 2～5% of quantity of steam, and is very little to its normal operating condition influence.
3., send the moisturizing in the shell side space of condenser (3) to, be in high vacuum system, make moisturizing be in the low boiling state, the dissolved oxygen in the water is separated out, and reaches deaerating effect in the spray mode.
Description of drawings:
Further specify below in conjunction with accompanying drawing;
Fig. 1 is a deaeration in condenser System planes structure chart: 1 utilizes the filling condensing turbine, 2 generators, 3 condensers, 4 hot wells, 5 condensate pumps, 6 water tanks, 7 feed pumps, 8 feed-regulating valves, 9AQC waste heat boiler drum, 10 collection cylinders, 11SP waste heat boiler drum, the 12SP waste heat boiler, 13AQC waste heat boiler, 14 economizers.
Beneficial effect:
1., greatly simplified the therrmodynamic system of Waste Heat Power Station, can cancel vacuum deaerator and water-steam system, reduced investment outlay.
2., condenser (3) normal operation do not need the deoxygenation operation, as long as just can guarantee deaerating effect.
3., can significantly improve the waste heat interest rate. 41 ℃～36 ℃ condensed water enters the water bringing-up section of waste heat boiler, can be with condensed water Be heated to more than 170 ℃, this section waste heat recovery amount accounts for this waste heat boiler and reclaims more than 40% of heat, can waste heat boiler is useless The gas exhaust temperature is down to about 100 ℃, has rationally improved the heat recovery rate.
Embodiment one:
Utilize the filling condensing turbine to connect (2) generator and (3) condenser by pipeline, (4) hot well and (5) condensate pump, (6) water tank, (7) feed pump connects, (8) feed-regulating valve is by pipeline and (9) AQC waste heat boiler drum, and (10) collect cylinder, (11) SP waste heat boiler drum and (12) SP waste heat boiler, (13) AQC waste heat boiler, (14) are connected with economizer.
The specific embodiment:
Utilize the filling condensing turbine to connect (2) generator and (3) condenser by pipeline, (4) hot well and (5) condensate pump, (6) water tank, (7) feed pump connects, (8) feed-regulating valve is by pipeline and (9) AQC waste heat boiler drum, and (10) collect cylinder, (11) SP waste heat boiler drum and (12) SP waste heat boiler, (13) AQC waste heat boiler, (14) are connected with economizer.
Claims (2)
1. one kind is utilized steam turbine condenser to carry out deaeration in condenser waste heat Power Plant Thermal System, it is characterized in that: the filling condensing turbine connects (2) generator and (3) condenser by pipeline, (4) hot well and (5) condensate pump, (6) water tank, (7) feed pump connects, and (8) feed-regulating valve is by pipeline and (9) AQC waste heat boiler drum, (10) collection cylinder, (11) SP waste heat boiler drum and (12) SP waste heat boiler, (13) AQC waste heat boiler, (14) are connected with economizer.
2. a kind of steam turbine condenser that utilizes according to claim 1 carries out deaeration in condenser waste heat Power Plant Thermal System, it is characterized in that: send the moisturizing in the shell side space of condenser (3) in the spray mode, be in high vacuum system, make moisturizing be in the low boiling state, dissolved oxygen in the water is separated out, and reaching deaerating effect is to set up a moisturizing adapter and chemical water pipe at condenser (3) shell side or well throat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100541500A CN101275738A (en) | 2007-03-27 | 2007-03-27 | After heat power station heat system for performing vacuum deoxidization using steam turbine condenser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100541500A CN101275738A (en) | 2007-03-27 | 2007-03-27 | After heat power station heat system for performing vacuum deoxidization using steam turbine condenser |
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| CN101275738A true CN101275738A (en) | 2008-10-01 |
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| CNA2007100541500A Pending CN101275738A (en) | 2007-03-27 | 2007-03-27 | After heat power station heat system for performing vacuum deoxidization using steam turbine condenser |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN102425779A (en) * | 2011-07-21 | 2012-04-25 | 中信重工机械股份有限公司 | Vacuum deoxidation method for condenser of waste heat utilization steam turbine of power station thermodynamic system |
| CN103453518A (en) * | 2013-09-17 | 2013-12-18 | 辽宁调兵山煤矸石发电有限责任公司 | Water filling device and method for subcritical and above pressure boiler |
| CN103851924A (en) * | 2014-02-27 | 2014-06-11 | 中冶华天工程技术有限公司 | Waste heat full-recovery recycling integration system for heating furnace |
| CN104456521A (en) * | 2014-11-13 | 2015-03-25 | 张德志 | Novel integrated and energy-saving thermodynamic system |
| CN111780091A (en) * | 2020-06-16 | 2020-10-16 | 大唐绥化热电有限公司 | Thermal power plant hot water heating management system based on waste heat of thermal power plant engine furnace |
-
2007
- 2007-03-27 CN CNA2007100541500A patent/CN101275738A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN102425779A (en) * | 2011-07-21 | 2012-04-25 | 中信重工机械股份有限公司 | Vacuum deoxidation method for condenser of waste heat utilization steam turbine of power station thermodynamic system |
| CN103453518A (en) * | 2013-09-17 | 2013-12-18 | 辽宁调兵山煤矸石发电有限责任公司 | Water filling device and method for subcritical and above pressure boiler |
| CN103851924A (en) * | 2014-02-27 | 2014-06-11 | 中冶华天工程技术有限公司 | Waste heat full-recovery recycling integration system for heating furnace |
| CN104456521A (en) * | 2014-11-13 | 2015-03-25 | 张德志 | Novel integrated and energy-saving thermodynamic system |
| CN111780091A (en) * | 2020-06-16 | 2020-10-16 | 大唐绥化热电有限公司 | Thermal power plant hot water heating management system based on waste heat of thermal power plant engine furnace |
| CN111780091B (en) * | 2020-06-16 | 2021-12-10 | 大唐绥化热电有限公司 | Thermal power plant hot water heating management system based on waste heat of thermal power plant engine furnace |
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Open date: 20081001 |