CN103672851A - Method and equipment for recycling demineralized water of thermal power plant - Google Patents
Method and equipment for recycling demineralized water of thermal power plant Download PDFInfo
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- CN103672851A CN103672851A CN201310645798.0A CN201310645798A CN103672851A CN 103672851 A CN103672851 A CN 103672851A CN 201310645798 A CN201310645798 A CN 201310645798A CN 103672851 A CN103672851 A CN 103672851A
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Abstract
The invention discloses a method for recycling demineralized water of a thermal power plant. The method includes the following steps that a collecting tank is built under a zero meter layer and used for recycling and storing the demineralized water; the recycle pressure of the demineralized water is divided into three grades, water return pipelines with different diameters are arranged respectively according to the different grades of the pressure of the demineralized water, and the pressure of the demineralized water entering the collecting tank is smaller than or equal to 0.05 MPa; a contracting-expanding nozzle and a recycle water pump are arranged above the zero meter layer of an outlet of the collecting tank, the demineralized water is recycled to a deaerator or other pressure containers. The invention further provides equipment for recycling the demineralized water of the thermal power plant. By utilizing the method and equipment to recycle the demineralized water of the thermal power plant, the situation that the demineralized water with different pressure and temperature grades of the thermal power plant can be recycled only in the deaerator can be changed, the problems of reboiling, the poor deaeration effect, overflowing and vibration of the deaerator are greatly mitigated, and the demineralized water of the thermal power plant can be fully recycled.
Description
Technical field
The present invention relates to thermal power plant boiler technology field, refer to particularly a kind of method and apparatus that reclaims steam power plant's demineralized water.
Background technology
Mainly bear the task of heat supply with supporting steam power plant of Chemical Manufacture enterprise, it is different that steam power plant need reclaim temperature and the pressure rating of demineralized water.
Chemical Manufacture relates to the steam of a plurality of different pressures grades with vapour, the pressure of the condensed water producing is also different, according to the supporting vapor flash tank that is equipped with of the pressure of condensed water, the steam of shwoot is personal or be incorporated to the steam pipe system of relevant pressure grade, and the condensed water (temperature is 60～120 ℃) 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 conventionally adopts demineralized water indirect heat exchange to absorb heat, absorbs the feedwater pumping boiler feed for demineralized water (temperature is 60～120 ℃) after heat.Boiler feed is positioned at the floor pot more than feed pump 10m layer, increases entrance of water-supplying pump pressure, guarantees not cavitation of feed pump.
The demineralized water of this all different pressures temperature grades can only be got back to just recoverable mode of oxygen-eliminating device, there are a lot of drawbacks, make oxygen-eliminating device need hardly to supplement the lower demineralized water of temperature, thus produce self-boiling, deaerating effect poor, even cause that oxygen-eliminating device overflow, oxygen-eliminating device play split the problems such as vibration.
After boiler overhaul, use feed pump that 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) is provided, water extraction condensing type Turbo-generator Set condenser cooling water pipe vapour side tank is used 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 that reclaims steam power plant's demineralized water.
For achieving the above object, the method that reclaims steam power plant's demineralized water provided by the invention, it comprises following steps:
A, below zero rice layer, building collecting-tank, for reclaiming, store 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 respectively the water return pipeline of different tube diameters, on water return pipeline, configure single-stage or multi-level throttle orifice plate, make demineralized water enter the pressure≤0.5MPa of collecting-tank;
C, more than collecting-tank outlet zero rice layer, configure contraction and enlargement nozzle and recovered water pump, demineralized water is recycled to oxygen-eliminating device or other pressure vessel.
As preferred version, in described step B, the demineralized water of pressure recovery≤0.5MPa directly enters collecting-tank by first order 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, by second level pipeline, enters collecting-tank; The desalination of pressure >=1.0MPa is installed multi-level throttle orifice plate entering 10～30 meters of of collecting-tank, by third level pipeline, enters collecting-tank.
The present invention also provides a kind of equipment that reclaims steam power plant's demineralized water, it is characterized in that: at zero rice layer to have for reclaiming, store the collecting-tank of 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, by second level demineralized water pipeline, enter collecting-tank; The third level demineralized water pipeline of pressure recovery >=1.0MPa, is provided with multi-level throttle orifice plate entering 10～30 meters of of collecting-tank, by third level demineralized water pipeline, enters collecting-tank; More than collecting-tank outlet zero rice layer, 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 comprises the equipment draining water source after heating steam condensate water, chemical industry heat transmission equipment demineralized water backwater and other use 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 is except for supplying sweet-water tank or other pressure vessel oxygen-eliminating device, therefore can greatly slow down that oxygen-eliminating device seethes with excitement again, deaerating effect is poor, the problem such as overflow and vibration.
2, can effectively recycle current boiler pressure testing leakage detection, extraction condensing type Turbo-generator Set condenser pressure testing leakage detection demineralized water afterwards.
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, reduces 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.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in the figure, reclaim the equipment of steam power plant's demineralized water, at zero rice layer to have for reclaiming, store the collecting-tank 6 of 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, by second level demineralized water pipeline 1, enter collecting-tank 6; The third level demineralized water pipeline 3 of pressure recovery >=1.0MPa, is provided with multi-level throttle orifice plate 4 at 10～30 meters of entering collecting-tank 6, by third level demineralized water pipeline 3, enters collecting-tank 6; More than collecting-tank 6 outlet zero rice layers, be provided with contraction and enlargement nozzle 7 and recovered water pump 8, recovered water pump 8 outlet pipe arrangements are 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, below zero rice layer, building collecting-tank, for reclaiming, store 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 respectively the water return pipeline of different tube diameters, on water return pipeline, configure single-stage or multi-level throttle orifice plate, make demineralized water enter the pressure≤0.5MPa of collecting-tank;
C, more than collecting-tank outlet zero rice layer, configure contraction and enlargement nozzle and recovered water pump, 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 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, by second level pipeline 1, enters collecting-tank 6; The desalination of pressure >=1.0MPa is installed multi-level throttle orifice plate 4 at 10～30 meters of entering collecting-tank 6, by third level pipeline 3, enters collecting-tank 6.
Operation principle of the present invention and the course of work are as follows:
Zero rice layer (± 0) contraction and enlargement nozzle of configuration and a recovered water pump more than collecting-tank.If demineralized water water temperature≤50 ℃ in collecting-tank, only need be with can normally moving after aqueduct air-discharging when starting recovered water pump; If demineralized water water temperature is at 60～120 ℃ in collecting-tank, the cold demineralized water that contraction and enlargement nozzle adopts pressure 0.7～1.0MPa, the water yield to fetch to receive water pump water outlet flow 1/5～1/12 as power source (as exit of pump flow 90m
3/ h, the cold demineralized water 10t/h left and right at the water source that is used as power); Power water source forms negative pressure at nozzle place, the demineralized water of collecting-tank is extracted out, then after recovered water pump, sent into oxygen-eliminating device, sweet-water tank or other pressure vessel.
Claims (3)
1. a method that reclaims steam power plant's demineralized water, it comprises the steps:
A, below zero rice layer, building collecting-tank, for reclaiming, store 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 respectively the water return pipeline of different tube diameters, on water return pipeline, configure single-stage or multi-level throttle orifice plate, make demineralized water enter the pressure≤0.5MPa of collecting-tank;
C, more than collecting-tank outlet zero rice layer, configure contraction and enlargement nozzle and recovered water pump, demineralized water is recycled to oxygen-eliminating device or other pressure vessel.
2. the method that reclaims steam power plant's demineralized water according to claim 1, is characterized in that: in described step B, the demineralized water of pressure recovery≤0.5MPa directly enters collecting-tank (6) by first order pipeline (5); The demineralized water of 0.5 < pressure < 1.0MPa, installs single-stage restricting orifice (2) in 10～15 meters of before entering collecting-tank (6), by second level pipeline (1), enters collecting-tank (6); The desalination of pressure >=1.0MPa is installed multi-level throttle orifice plate (4) entering (6) 10～30 meters of of collecting-tank, by third level pipeline (3), enters collecting-tank (6).
3. the equipment of recovery according to claim 1 and 2 steam power plant demineralized water, is characterized in that: at zero rice layer to have the collecting-tank (6) for reclaiming, store 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); The second level demineralized water pipeline (1) of 0.5 < pressure recovery < 1.0MPa, described second level demineralized water pipeline (1) is provided with single-stage restricting orifice (2) in 10～15 meters of before entering collecting-tank (6), by second level demineralized water pipeline (1), enters collecting-tank (6); The third level demineralized water pipeline (3) of pressure recovery >=1.0MPa, is provided with multi-level throttle orifice plate (4) entering (6) 10～30 meters of of collecting-tank, by third level demineralized water pipeline (3), enters collecting-tank (6); More than collecting-tank (6) outlet zero rice 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436866A (en) * | 2016-07-26 | 2017-02-22 | 华电电力科学研究院 | Recovery system and method for desalting water leaked from rotor cooling water generator water-intake water ring sleeve |
| 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 |
| CN107957475A (en) * | 2017-11-17 | 2018-04-24 | 广西华银铝业有限公司 | A kind of method for improving backwater receipts rate in aluminium oxide backwater technique |
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| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436866A (en) * | 2016-07-26 | 2017-02-22 | 华电电力科学研究院 | Recovery system and method for desalting water leaked from rotor cooling water generator water-intake water ring sleeve |
| 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 |
| CN107957475A (en) * | 2017-11-17 | 2018-04-24 | 广西华银铝业有限公司 | A kind of method for improving backwater receipts rate in aluminium oxide backwater technique |
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