CN101574695A - Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant - Google Patents
Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant Download PDFInfo
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- CN101574695A CN101574695A CNA2009103032003A CN200910303200A CN101574695A CN 101574695 A CN101574695 A CN 101574695A CN A2009103032003 A CNA2009103032003 A CN A2009103032003A CN 200910303200 A CN200910303200 A CN 200910303200A CN 101574695 A CN101574695 A CN 101574695A
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Abstract
The invention discloses a method and a device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant. The valves of the normal drainage conduit and the emergency drainage conduit of a high-low pressure heater system are closed before adjusting; and water is fed into a vapor side pipe of the high-low pressure heater system through a vapor side exit; when the water pressure is close to the biggest bearable pressure of the high-low pressure heater system, the valve of the emergency drainage conduit is opened to drain water. By adopting the probability of blocking the filtering nets at the inlets of a condensate pump and a boiler water feed pump and unexpected stoppage caused by water-level accident are reduced greatly; the reliability of the equipment is improved; the debugging time is shortened; compared with other set of the same type, by adopting the technique, the filtering net blockage is greatly improved, the times for washing the filtering net at the inlet of the condensate pump are decreased by 8 times; if the expense of stopping a large-sized heat-engine set is 600,000 RMB, 4,800,000 RMB can be saved.
Description
Technical field
The present invention relates to a kind of flushing vapor side method and device of large thermal power plant high and low pressure heater, belong to large thermal power plant high and low pressure heater technical field.
Background technology
Thermal power plant's high and low pressure heater is the abbreviation to high-pressure heater and low-pressure heater.
Between the large thermal power plant limber up period, the big restraining factors that puzzlement steam turbine side starts process are exactly that condensate pump inlet and boiler feed pump inlet screen stop up, the filter screen obstruction can cause pump and feed pump water outlet interruption with fixed attention, causes the boiler replenishing water difficulty, and boiler also can be forced to blowing out because of lack of water when serious.The applicant is at the soft flocks, machine oil etc. that through the main component of finding these materials after the material that stops up filter screen has been carried out long-term follow-up investigation and sample analysis are iron rust, dust, welding slag, machining.The source of further analyzing these materials again then is the high and low pressure heater heat regenerative system of drawing gas, because of have the normal drain water piping between a large amount of extraction lines, the heater, the critical drain water piping and the high and low pressure heater device itself of heater in the high and low pressure heater draws gas heat regenerative system, these pipelines can unavoidably produce soft flocks, machine oil, welding slag, iron rust and the dust stratification etc. of machining in production, installation and transportation; Start the back at steam turbine like this and drop into the high and low pressure heater heat regenerative system of drawing gas, steam and hydrophobic washing away down these materials can be flushed in condenser hotwell or the oxygen-eliminating device, cause tying the obstruction of pump entrance and boiler feed pump inlet screen; Can influence security, reliability and the economy of boiler plant so greatly; Large electric power plant unit start and stop total cost once is up to RMB about 600,000 according to statistics, and the number of times that causes filter screen to stop up cleaning because of the soft flocks of the iron rust in the high-low pressure heater, dust, welding slag, machining, machine oil etc. just up to 8 times about, cause a large amount of consumption of manpower and materials, reduce the reliability of equipment; Also prolonged simultaneously the debugging duration of unit.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of system simple, can effectively solve condensate pump inlet and boiler feed pump inlet screen and stop up and cause the flushing vapor side method and the device of the large thermal power plant high and low pressure heater of pump and the not water outlet of feed pump pump with fixed attention, to overcome the deficiencies in the prior art.
Technical scheme of the present invention is: the large thermal power plant height, the flushing vapor side method of low-pressure heater comprises one or more height, the low-pressure heater system, height more than one, the vapour side of low-pressure heater system connects by the normal drain water piping of band valve, this method is to close normal drain water piping and height before debugging, the critical hydrophobic pipeline valve of low-pressure heater system, and remove high, the vapour side safety door of low-pressure heater system connects water injecting pipeline, water injecting pipeline utilizes vapour side safety door to height, the lateral steam tube of low-pressure heater system injects, when the approaching height of hydraulic pressure, open critical hydrophobic pipeline valve when low-pressure heater system maximum is born pressure and carry out draining, it is high until every to repeat above-mentioned steps, the entry of low-pressure heater system is consistent with effluent quality.
The flushing vapor side device of large thermal power plant high and low pressure heater comprises one or more high and low pressure heater system, on the high and low pressure heater system, be provided with the critical hydrophobic pipeline of vapour side safety door and band valve, the vapour side of the high and low pressure heater system more than interconnects by the normal drain water piping of band valve, is connected with water injecting pipeline on the vapour side safety door of one or every high and low pressure heater system therein.
On water injecting pipeline, be connected with valve.
Water injecting pipeline is connected along on first high and low pressure heater system of the hydrophobic flow direction.
Water injecting pipeline is connected with condensate pipe.
Water injecting pipeline is connected on the condensate pipe that has valve.
Compared with the prior art, the present invention is by closing normal drain water piping and height before debugging, the critical hydrophobic pipeline valve of low-pressure heater system, and remove high, the vapour side safety door of low-pressure heater system connects water injecting pipeline, water injecting pipeline utilizes vapour side safety door to height, the lateral steam tube of low-pressure heater system injects, when the approaching height of hydraulic pressure, open critical hydrophobic pipeline valve when low-pressure heater system maximum is born pressure and carry out draining, it is high until every to repeat above-mentioned steps, the entry of low-pressure heater system is consistent with effluent quality, allow the demineralized water of certain pressure to extraction line like this, normal drain water piping between the heater, the critical drain water piping and the height of heater, low-pressure heater equipment itself effectively washes, the pressure and the quick critical hydrophobic door of opening that utilize water pump to produce, form the big flow of moment and cause bigger instantaneous momentum, just can before debugging, effectively remove the iron rust in the former pipeline, dust, welding slag, the soft flocks of machining, machine oil etc.Can reduce the probability that condensate pump enters the mouth and the boiler feed pump inlet screen stops up greatly after adopting the present invention, reduce the unplanned stoppage in transit that unit causes because of the water level accident.Can improve the reliability of equipment, shorten the debugging duration.Once on unit of the same type, compared discovery, the filter screen stopping state takes on a new look greatly after adopting present technique, cleaning the condensate pump inlet screen less 8 times, is 600,000 RMB by expense of large electric power plant unit start and stop, can save RMB up to 4,800,000 yuan.
On water injecting pipeline, be connected with valve, can conveniently control water filling like this; Water injecting pipeline is connected with condensate pipe, because of just be provided with condensate pipe near vapour side safety door, can further simplify the present invention like this, can utilize intrinsic system and pipeline, only connects a spot of pipeline and valve can be finished layout of the present invention when improving; Water injecting pipeline is connected on the condensate pipe that has valve, can directly utilize the valve on the condensate pipe like this, further reduces engineering cost.The present invention simultaneously also has advantages such as simple in structure, that construction is quick, construction costs is low, has the practicality and the generalization that also have.
Description of drawings
Fig. 1 is a high-pressure heater flushing vapor side structural representation;
Fig. 2 is a low-pressure heater flushing vapor side structural representation.
The specific embodiment
Embodiment 1: with three high-pressure heater systems 1 is that the vapour side water flushing of example is taken over the road system by the mode of Fig. 1, the vapour side of an above high-pressure heater system 1 connects by the normal drain water piping 2 of band valve, (this example is selected on the vapour side safety door 3 of first high-pressure heater system 1 and connects a water injecting pipeline 5 to connect a water injecting pipeline 5 therein on the vapour side safety door 3 of one or every or every high-pressure heater system 1, promptly along first high-pressure heater system 1 of the hydrophobic flow direction), water injecting pipeline 5 is connected on the condensate pipe that has valve, also can be on water injecting pipeline 5 independent mounted valve, hydrophobic door before draw gas Electrically operated gate and non-return flap and the Electrically operated gate of drawing gas of each high-pressure heater system 1 of steam turbine the time are closed in flushing earlier, close the valve of the critical hydrophobic pipeline 4 of the normal drain water piping 2 that connects first high-pressure heater system 1 and second high-pressure heater system 1 and first high-pressure heater system 1, start the condensate pump that is connected with condensate pipe, adjust below the operating pressure that pump discharge pressure can bear to each high-pressure heater system 1, open valve on the water injecting pipeline 5 to 1 water filling of high-pressure heater system, after treating that high-pressure heater is filled with water, open the valve of the critical hydrophobic pipeline 4 of high-pressure heater system 1, a large amount of bands presses condensate water can each pipeline and the body of high-pressure heater system 2 be washed, repeat above process and rinse (inlet outlet water quality unanimity) well up to first high-pressure heater system 1, close the valve of the critical hydrophobic pipeline 4 of first and second high-pressure heater system 1 then, open high-pressure heater at the corresponding levels system 1 to the valve of the normal drain water piping 2 of next stage high-pressure heater system 1 to 1 water filling of next stage high-pressure heater system, after treating that next stage high-pressure heater system 1 fills with water, open the valve of the critical hydrophobic pipeline 4 of second high-pressure heater system 1, a large amount of bands presses condensate water can each pipeline and the body of second high-pressure heater system 2 be washed, and repeats above process and rinses (inlet outlet water quality unanimity) well up to second high-pressure heater system 1.All the other high-pressure heater system 1 flushing processes are similar; Each critical hydrophobic pipeline 4 interconnects by pipeline.
With four low-pressure heater systems 6 is that the vapour side water flushing of example is taken over the road system by the mode of Fig. 1, the vapour side of an above low-pressure heater system 6 connects by the normal drain water piping 2 of band valve, (this example is selected on the vapour side safety door 3 of first low-pressure heater system 6 and connects a water injecting pipeline 5 to connect a water injecting pipeline 5 therein on the vapour side safety door 3 of one or every low-pressure heater system 1, promptly along first low-pressure heater system 6 of the hydrophobic flow direction), water injecting pipeline 5 is connected on the condensate pipe that has valve, also can be on water injecting pipeline 5 independent mounted valve, hydrophobic door before draw gas Electrically operated gate and non-return flap and the Electrically operated gate of drawing gas of each low-pressure heater system 6 of steam turbine the time are closed in flushing earlier, close the valve of the critical hydrophobic pipeline 4 of the normal drain water piping 2 that connects first low-pressure heater system 6 and second low-pressure heater system 6 and first low-pressure heater system 6, start the condensate pump that is connected with condensate pipe, adjust below the operating pressure that pump discharge pressure can bear to each low-pressure heater system 6, open valve on the water injecting pipeline 5 to 6 water fillings of low-pressure heater system, after treating that high-pressure heater is filled with water, open the valve of the critical hydrophobic pipeline 4 of low-pressure heater system 6, a large amount of bands presses condensate water can each pipeline and the body of high-pressure heater system 2 be washed, repeat above process and rinse (inlet outlet water quality unanimity) well up to first low-pressure heater system 6, close the valve of the critical hydrophobic pipeline 4 of first and second low-pressure heater system 6 then, open low-pressure heater at the corresponding levels system 6 to the valve of the normal drain water piping 2 of next stage low-pressure heater system 6 to 6 water fillings of next stage low-pressure heater system, after treating that next stage low-pressure heater system 6 fills with water, open the valve of the critical hydrophobic pipeline 4 of second low-pressure heater system 6, a large amount of bands presses condensate water can each pipeline and the body of second high-pressure heater system 2 be washed, and repeats above process and rinses (inlet outlet water quality unanimity) well up to second low-pressure heater system 6.All the other low-pressure heater system 6 flushing processes are similar; Each critical hydrophobic pipeline 4 interconnects by pipeline.
Claims (6)
1. large thermal power plant height, the flushing vapor side method of low-pressure heater, it comprises one or more height, the low-pressure heater system, height more than one, the vapour side of low-pressure heater system connects by the normal drain water piping of band valve, it is characterized in that: this method is to close normal drain water piping and height before debugging, the critical hydrophobic pipeline valve of low-pressure heater system, and remove high, the vapour side safety door of low-pressure heater system connects water injecting pipeline, water injecting pipeline utilizes vapour side safety door to height, the lateral steam tube of low-pressure heater system injects, when the approaching height of hydraulic pressure, open critical hydrophobic pipeline valve when low-pressure heater system maximum is born pressure and carry out draining, it is high until every to repeat above-mentioned steps, the entry of low-pressure heater system is consistent with effluent quality.
2. large thermal power plant height, the flushing vapor side device of low-pressure heater, it comprises one or more height, low-pressure heater system (1), (6), it is characterized in that: at height, low-pressure heater system (1), (6) be provided with vapour side safety door (3) and the band valve critical hydrophobic pipeline (4), height more than one, low-pressure heater system (1), (6) vapour side interconnects by the normal drain water piping (2) of band valve, and one or every are high therein, low-pressure heater system (1), (6) be connected with water injecting pipeline (5) on the vapour side safety door (3).
3. the flushing vapor side device of large thermal power plant high and low pressure heater according to claim 2 is characterized in that: be connected with valve on water injecting pipeline (5).
4. the flushing vapor side device of large thermal power plant high and low pressure heater according to claim 2 is characterized in that: water injecting pipeline (5) is connected along on first high and low pressure heater system (1) of the hydrophobic flow direction, (6).
5. the flushing vapor side device of large thermal power plant high and low pressure heater according to claim 2 is characterized in that: water injecting pipeline (5) is connected with condensate pipe.
6. the flushing vapor side device of large thermal power plant high and low pressure heater according to claim 5 is characterized in that: water injecting pipeline (5) is connected on the condensate pipe that has valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103032003A CN101574695A (en) | 2009-06-12 | 2009-06-12 | Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009103032003A CN101574695A (en) | 2009-06-12 | 2009-06-12 | Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant |
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| CN101574695A true CN101574695A (en) | 2009-11-11 |
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| CNA2009103032003A Pending CN101574695A (en) | 2009-06-12 | 2009-06-12 | Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618321A (en) * | 2012-04-20 | 2012-08-01 | 江苏联东化工股份有限公司 | Method for synthesizing oil modifier by hydrogenating washing oil |
| CN102817644A (en) * | 2012-08-08 | 2012-12-12 | 上海电力建设启动调整试验所 | Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit |
| CN102899676A (en) * | 2012-11-07 | 2013-01-30 | 贵州电力试验研究院 | Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method |
| CN109441579A (en) * | 2018-10-17 | 2019-03-08 | 郑州赛为机电设备有限公司 | Heat recovery apparatus and energy conserving system are abandoned in a kind of power station |
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| CN1695829A (en) * | 2005-05-27 | 2005-11-16 | 江苏省电力试验研究院有限公司 | Method for washing pipe by using steam from boiler |
| CN101157083A (en) * | 2007-09-10 | 2008-04-09 | 孙启玉 | A method for hot dipping cleaning scorch air pipe |
| CN201423375Y (en) * | 2009-06-12 | 2010-03-17 | 贵州电力试验研究院 | Steam side washing device for high and low pressure heaters in large-scale thermal power plant |
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2009
- 2009-06-12 CN CNA2009103032003A patent/CN101574695A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1695829A (en) * | 2005-05-27 | 2005-11-16 | 江苏省电力试验研究院有限公司 | Method for washing pipe by using steam from boiler |
| CN101157083A (en) * | 2007-09-10 | 2008-04-09 | 孙启玉 | A method for hot dipping cleaning scorch air pipe |
| CN201423375Y (en) * | 2009-06-12 | 2010-03-17 | 贵州电力试验研究院 | Steam side washing device for high and low pressure heaters in large-scale thermal power plant |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618321A (en) * | 2012-04-20 | 2012-08-01 | 江苏联东化工股份有限公司 | Method for synthesizing oil modifier by hydrogenating washing oil |
| CN102817644A (en) * | 2012-08-08 | 2012-12-12 | 上海电力建设启动调整试验所 | Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit |
| CN102817644B (en) * | 2012-08-08 | 2014-12-31 | 上海电力建设启动调整试验所 | Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit |
| CN102899676A (en) * | 2012-11-07 | 2013-01-30 | 贵州电力试验研究院 | Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method |
| CN102899676B (en) * | 2012-11-07 | 2014-12-10 | 贵州电力试验研究院 | Connecting method and structure of temporary pipes of chemical cleaning system of thermal equipment and washing method |
| CN109441579A (en) * | 2018-10-17 | 2019-03-08 | 郑州赛为机电设备有限公司 | Heat recovery apparatus and energy conserving system are abandoned in a kind of power station |
| CN109441579B (en) * | 2018-10-17 | 2024-01-09 | 郑州赛为机电设备有限公司 | Power station abandons heat recovery unit and economizer system |
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Application publication date: 20091111 |