CN103672851B - Reclaim the method and apparatus of steam power plant's demineralized water - Google Patents
Reclaim the method and apparatus of steam power plant's demineralized water Download PDFInfo
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- CN103672851B CN103672851B CN201310645798.0A CN201310645798A CN103672851B CN 103672851 B CN103672851 B CN 103672851B CN 201310645798 A CN201310645798 A CN 201310645798A CN 103672851 B CN103672851 B CN 103672851B
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Abstract
The invention discloses a kind of method reclaiming steam power plant's demineralized water, it comprises following steps: A, build collecting-tank below at zero meter of layer, for reclaiming, storing demineralized water; B, demineralized water pressure recovery is divided into three grades, according to different brackets demineralized water pressure, configures the water return pipeline of different tube diameters respectively, make demineralized water enter the pressure≤0.5MPa of collecting-tank; C, export zero meter of layer at collecting-tank and configure contraction and enlargement nozzle and recovered water pump above, demineralized water is recycled to oxygen-eliminating device or other pressure vessel.The present invention also provides a kind of equipment reclaiming steam power plant's demineralized water.Use the present invention to reclaim steam power plant's demineralized water, the demineralized water that can change steam power plant's different pressures temperature grade can only enter the situation that oxygen-eliminating device could be recycled, and greatly alleviates that oxygen-eliminating device seethes with excitement again, deaerating effect is poor, the problem such as overflow and vibration; The demineralized water of steam power plant can be fully recycled.
Description
Technical field
The present invention relates to thermal power plant boiler technology field, refer to a kind of method and apparatus reclaiming steam power plant's demineralized water particularly.
Background technology
The steam power plant supporting with Chemical Manufacture enterprise mainly bears the task of heat supply, steam power plant need reclaim the temperature of demineralized water and pressure rating different.
Chemical Manufacture vapour relates to the steam of multiple different pressures grade, the pressure of the condensed water produced is also different, according to the pressure of condensed water is supporting, vapor flash tank is housed, the steam of shwoot is used by oneself or is incorporated to the steam pipe system of relevant pressure grade, and the condensed water (temperature is 60 ~ 120 DEG C) that flash evaporation tank produces is again with feedwater pumping boiler feed; In chemical process, the caloric requirement that many technical process produce is absorbed, and usually adopts demineralized water indirect heat exchange to absorb heat, absorbs the feedwater of the demineralized water (temperature is 60 ~ 120 DEG C) after heat pumping boiler feed.Boiler feed is positioned at the floor of more than pot feed pump 10m layer, increases entrance of water-supplying pump pressure, ensures feed pump not cavitation.
The demineralized water of this all different pressures temperature grade can only get back to oxygen-eliminating device just recoverable mode, there is a lot of drawback, make oxygen-eliminating device need the demineralized water that supplementary temperature is lower hardly, thus produce self-boiling, deaerating effect poor, even cause oxygen-eliminating device overflow, oxygen-eliminating device play splits the problems such as vibration.
Feed pump is used to provide high pressure desalination deaerated water leak detection pressure testing (as 3.8MPa medium-pressure boiler leak detection pressure testing 6.0MPa water under high pressure, 9.8MPa high-pressure boiler leak detection pressure testing 15MPa water under high pressure) after boiler overhaul, water extraction condensing type Turbo-generator Set condenser cooling water pipe vapour side tank uses demineralized water leak detection pressure testing, demineralized water after leak detection pressure testing directly discharges, and causes the waste of demineralized water.
Summary of the invention
For above-mentioned deficiency, the object of this invention is to provide a kind of method and apparatus reclaiming steam power plant's demineralized water.
For achieving the above object, the method for recovery steam power plant provided by the invention demineralized water, it comprises following steps:
A, build collecting-tank below at zero meter of layer, for reclaiming, storing demineralized water;
B, demineralized water pressure recovery is divided into three grades, be respectively pressure recovery≤0.5MPa, 0.5 < pressure < 1.0MPa and pressure >=1.0MPa, according to different brackets demineralized water pressure, configure the water return pipeline of different tube diameters respectively, water return pipeline configures single-stage or multi-level throttle orifice plate, makes demineralized water enter the pressure≤0.5MPa of collecting-tank;
C, export zero meter of layer at collecting-tank and configure contraction and enlargement nozzle and recovered water pump above, demineralized water is recycled to oxygen-eliminating device or other pressure vessel.
Preferably, in described step B, the demineralized water of pressure recovery≤0.5MPa directly enters collecting-tank by first order demineralized water pipeline; The demineralized water of 0.5 < pressure < 1.0MPa, before entering collecting-tank, single-stage restricting orifice is installed at 10 ~ 15 meters of, enters collecting-tank by second level demineralized water pipeline; Multi-level throttle orifice plate is installed at demineralized water 10 ~ 30 meters of before entering collecting-tank of pressure >=1.0MPa, enters collecting-tank by third level demineralized water pipeline.
The present invention also provides a kind of equipment reclaiming steam power plant's demineralized water, it is characterized in that: at zero meter of layer to have the collecting-tank for reclaiming, storing demineralized water; Also be provided with three grades of demineralized water recovery channels, be respectively: the first order demineralized water pipeline of pressure recovery≤0.5MPa, described first order demineralized water pipeline directly enters collecting-tank; The second level demineralized water pipeline of 0.5 < pressure recovery < 1.0MPa, demineralized water pipeline 10 ~ 15 meters of before entering collecting-tank in the described second level are provided with single-stage restricting orifice, enter collecting-tank by second level demineralized water pipeline; The third level demineralized water pipeline of pressure recovery >=1.0MPa, before entering collecting-tank, 10 ~ 30 meters of are provided with multi-level throttle orifice plate, enter collecting-tank by third level demineralized water pipeline; Export more than zero meter of layer at collecting-tank and be provided with contraction and enlargement nozzle and recovered water pump, recovered water pump outlet pipe arrangement is connected with oxygen-eliminating device and other pressure vessel.
Demineralized water described in the present invention comprise heating steam condensate water, chemical industry heat transmission equipment demineralized water backwater and other use the equipment draining water source after demineralized water pressure testing, leakage detection.
The invention has the advantages that:
1, in collecting-tank, demineralized water water temperature decreases, and the demineralized water in collecting-tank can also supply sweet-water tank or other pressure vessel except for except oxygen-eliminating device, therefore, it is possible to greatly slow down, oxygen-eliminating device seethes with excitement again, deaerating effect is poor, the problem such as overflow and vibration.
2, the demineralized water after current boiler pressure testing leakage detection, extraction condensing type Turbo-generator Set condenser pressure testing leakage detection can effectively be recycled.
3, the demineralized water of other approach of steam power plant can be fully recycled, and can reduce steam power plant's chemistry water yield processed and acid and alkali consumption, reduce the discharge of acidic and alkaline waste water.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
In figure: second level demineralized water pipeline 1, single-stage restricting orifice 2, third level demineralized water pipeline 3, multi-level throttle orifice plate 4, first order demineralized water pipeline 5, collecting-tank 6, open flow mouth 7, recovered water pump 8.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in the figure, the equipment of steam power plant's demineralized water is reclaimed, at zero meter of layer to have the collecting-tank 6 for reclaiming, storing demineralized water; Also be provided with three grades of demineralized water recovery channels, be respectively: the first order demineralized water pipeline 5 of pressure recovery≤0.5MPa, first order demineralized water pipeline 5 directly enters collecting-tank 6; The second level demineralized water pipeline 1 of 0.5 < pressure recovery < 1.0MPa, second level demineralized water pipeline 1 10 ~ 15 meters of before entering collecting-tank 6 are provided with single-stage restricting orifice 2, enter collecting-tank 6 by second level demineralized water pipeline 1; The third level demineralized water pipeline 3 of pressure recovery >=1.0MPa, is provided with multi-level throttle orifice plate 4 entering before collecting-tank 6 10 ~ 30 meters of, enters collecting-tank 6 by third level demineralized water pipeline 3; Export more than zero meter of layer at collecting-tank 6 and be provided with contraction and enlargement nozzle 7 and recovered water pump 8, recovered water pump 8 exports pipe arrangement and is connected with oxygen-eliminating device and other pressure vessel.
The present invention reclaims the method for steam power plant's demineralized water, and it comprises the steps:
A, build collecting-tank below at zero meter of layer, for reclaiming, storing demineralized water;
B, demineralized water pressure recovery is divided into three grades, be respectively pressure recovery≤0.5MPa, 0.5 < pressure < 1.0MPa and pressure >=1.0MPa, according to different brackets demineralized water pressure, configure the water return pipeline of different tube diameters respectively, water return pipeline configures single-stage or multi-level throttle orifice plate, makes demineralized water enter the pressure≤0.5MPa of collecting-tank;
C, export zero meter of layer at collecting-tank and configure contraction and enlargement nozzle and recovered water pump above, demineralized water is recycled to oxygen-eliminating device or other pressure vessel.
In step B, the demineralized water of pressure recovery≤0.5MPa directly enters collecting-tank 6 by first order demineralized water pipeline 5; The demineralized water of 0.5 < pressure < 1.0MPa, before entering collecting-tank 6, single-stage restricting orifice 2 is installed at 10 ~ 15 meters of, enters collecting-tank 6 by second level demineralized water pipeline 1; Multi-level throttle orifice plate 4 is installed at 10 ~ 30 meters of that demineralized water is entering collecting-tank 6 of pressure >=1.0MPa, enters collecting-tank 6 by third level demineralized water pipeline 3.
Operation principle of the present invention and the course of work as follows:
Zero meter of layer (± 0) configuration contraction and enlargement nozzle and a recovered water pump more than collecting-tank.If demineralized water water temperature≤50 DEG C in collecting-tank, only need when starting recovered water pump with aqueduct air-discharging after can normally run; If demineralized water water temperature is at 60 ~ 120 DEG C in collecting-tank, contraction and enlargement nozzle adopts pressure 0.7 ~ 1.0MPa, the water yield fetch receive water pump water outlet flow 1/5 ~ 1/12 cold demineralized water as power source (as exit of pump flow 90m
3/ h, cold demineralized water about the 10t/h at the water source that is used as power); Power water source forms negative pressure at nozzle place, is extracted out by the demineralized water of collecting-tank, then after recovered water pump, sends into oxygen-eliminating device, sweet-water tank or other pressure vessel.
Claims (2)
1. reclaim a method for steam power plant's demineralized water, it comprises the steps:
A, build collecting-tank below at zero meter of layer, for reclaiming, storing demineralized water;
B, demineralized water pressure recovery is divided into three grades, be respectively pressure recovery≤0.5MPa, 0.5 < pressure < 1.0MPa and pressure >=1.0MPa, according to different brackets demineralized water pressure, configure the water return pipeline of different tube diameters respectively, water return pipeline configures single-stage or multi-level throttle orifice plate, makes demineralized water enter the pressure≤0.5MPa of collecting-tank;
C, export zero meter of layer at collecting-tank and configure contraction and enlargement nozzle and recovered water pump above, demineralized water is recycled to oxygen-eliminating device or other pressure vessel;
In described step B, the demineralized water of pressure recovery≤0.5MPa directly enters collecting-tank (6) by first order demineralized water pipeline (5); The demineralized water of 0.5 < pressure < 1.0MPa, before entering collecting-tank (6), single-stage restricting orifice (2) is installed at 10 ~ 15 meters of, enters collecting-tank (6) by second level demineralized water pipeline (1); Multi-level throttle orifice plate (4) is installed at demineralized water 10 ~ 30 meters of before entering collecting-tank (6) of pressure >=1.0MPa, enters collecting-tank (6) by third level demineralized water pipeline (3).
2. adopt an equipment for the method reclaiming steam power plant's demineralized water described in claim 1, it is characterized in that: at zero meter of layer to have the collecting-tank (6) for reclaiming, storing demineralized water; Also be provided with three grades of demineralized water recovery channels, be respectively: the first order demineralized water pipeline (5) of pressure recovery≤0.5MPa, described first order demineralized water pipeline (5) directly enters collecting-tank (6); Second level demineralized water pipeline (1) of 0.5 < pressure recovery < 1.0MPa, described second level demineralized water pipeline (1) was provided with single-stage restricting orifice (2) in 10 ~ 15 meters of before entering collecting-tank (6), entered collecting-tank (6) by second level demineralized water pipeline (1); The third level demineralized water pipeline (3) of pressure recovery >=1.0MPa, before entering collecting-tank (6), 10 ~ 30 meters of are provided with multi-level throttle orifice plate (4), enter collecting-tank (6) by third level demineralized water pipeline (3); More than collecting-tank (6) outlet zero meter of layer, be provided with contraction and enlargement nozzle (7) and recovered water pump (8), recovered water pump (8) outlet pipe arrangement is connected with oxygen-eliminating device and other pressure vessel.
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| CN106436866B (en) * | 2016-07-26 | 2019-04-09 | 华电电力科学研究院 | The cooling water generator water inlet water ring set leakage desalination water reclamation system of rotor and method |
| CN106678772A (en) * | 2016-12-27 | 2017-05-17 | 安徽海螺川崎工程有限公司 | Waste heat boiler system for electricity generation through waste incineration |
| CN107957475B (en) * | 2017-11-17 | 2021-01-05 | 广西华银铝业有限公司 | Method for improving return water recovery rate in alumina return water process |
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| US3813037A (en) * | 1972-06-13 | 1974-05-28 | M Bekedam | Closed condensate system |
| CN2421518Y (en) * | 2000-04-07 | 2001-02-28 | 蒋艺 | Device for recovering and storing condensed mater |
| CN101290087A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Vapour condensation water and its indirect steam recovery method and equipment |
| CN101498438A (en) * | 2009-03-03 | 2009-08-05 | 石狮市亿祥染整有限公司 | Condensed water reclaiming system |
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2013
- 2013-12-04 CN CN201310645798.0A patent/CN103672851B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3813037A (en) * | 1972-06-13 | 1974-05-28 | M Bekedam | Closed condensate system |
| CN2421518Y (en) * | 2000-04-07 | 2001-02-28 | 蒋艺 | Device for recovering and storing condensed mater |
| CN101290087A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Vapour condensation water and its indirect steam recovery method and equipment |
| CN101498438A (en) * | 2009-03-03 | 2009-08-05 | 石狮市亿祥染整有限公司 | Condensed water reclaiming system |
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