CN101423282A - Station boiler and water and oxygen supply apparatus and method thereof - Google Patents
Station boiler and water and oxygen supply apparatus and method thereof Download PDFInfo
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- CN101423282A CN101423282A CNA200810180552XA CN200810180552A CN101423282A CN 101423282 A CN101423282 A CN 101423282A CN A200810180552X A CNA200810180552X A CN A200810180552XA CN 200810180552 A CN200810180552 A CN 200810180552A CN 101423282 A CN101423282 A CN 101423282A
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 294
- 239000001301 oxygen Substances 0.000 title claims abstract description 294
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 290
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000001706 oxygenating effect Effects 0.000 claims abstract description 75
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000001502 supplementing effect Effects 0.000 claims description 41
- 230000001112 coagulating effect Effects 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000006213 oxygenation reaction Methods 0.000 abstract description 17
- 238000013461 design Methods 0.000 abstract description 8
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 230000009469 supplementation Effects 0.000 abstract 1
- 239000008400 supply water Substances 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- 150000002926 oxygen Chemical class 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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Abstract
The invention discloses an oxygenating device for a station boiler and water supply and an oxygenating method thereof. The oxygenating device comprises an oxygen content measurement module, an oxygen supply and an oxygen flow regulation module, wherein, the oxygen content measurement module is used for measuring the dissolved oxygen content of condensed water at an entrance of a pump package of a condensed water pump for a station boiler; the oxygen supply is used for supplying oxygen required by oxygen supplementation; and the oxygen flow regulation module is connected with the oxygen supply, can be inserted into the entrance of the pump package of a condensed water pump, and is used for controlling the flow oxygenating to condensed water according to the dissolved oxygen content output by the oxygen content measurement module. The method and the device are used in the mode of water supply weak oxidizing treatment (or AVT(O)) of a high parameter machine set of a station so as to supply, regulate and control the dissolved oxygen of the condensed water and economizer supply water, which is in accordance with the requirements of weak oxidizing treatment. By the regulation and the design of oxygenating points and flow, the invention simplifies a system, increases the safe reliability of the system, stabilizes the oxygenation differential pressure and simplifies control.
Description
Technical field
The present invention relates to station boiler and give water technology, relate in particular to a kind of station boiler and water-supply oxygen supplementing device thereof and method.
Background technology
Dissolved oxygen is considered to be in an important chemical index in the Power Plant Water Vapor circulatory monitoring.The chemical process that oiler feed is handled comprises reductibility processing (the Reducing All-VolatileTreatment that volatilizees entirely, AVT (R)), oxidisability processing (the Oxidizing All-VolatileTreatment that volatilizees entirely, AVT (O)) and oxygenation handle (Oxygenated Treatment, OT).The system that uses OT and AVT (O) is reliable in the world at present and operating performance water treatment system preferably.Under the condition of aerobic, the hole of Z 250 protective layer can be filled by the ferric oxide hydrate (FeOOH) of some low-solubilities or ferric oxide (Fe2O3).Sometimes ferric oxide even can cover whole Z 250 protective layer.Like this, the iron concentration in the feedwater just may reach minimum standard.For the oxygen concn in the feedwater, AVT (R) general requirement≤7ppb of system is low more good more; The OK range of OT system can be tens of to hundreds of ppb; And AVT (O) general requirement≤10ppb of system is limited on leaning on.
Feedwater AVT (O) mode is a kind of new oiler feed processing mode.This processing mode is carried out oxidisability to water feeding system and is handled by precisely adjusting economizer inlet ug/L magnitude trace oxygen.In the AVT of prior art (O) mode, condensed water and economizer are given the uncontrollable leakage of water-soluble oxygen from condenser, to exceeding the part of demand, regulate by adjusting deaerator exhaust; But if natural leak dissolved oxygen deficiency, the AVT of prior art (O) mode is not given consideration.Practice shows, progress with modern high pressure high temperature turbosets, most unit condenser tightness excellences, the nature dissolved oxygen is few, condensed water almost is in anaerobic state, the dissolved oxygen control method of the AVT of prior art (O) mode is powerless, can not guarantee best dissolved oxygen control, therefore needs a kind of corresponding oxygenating mode.
The OT mode of prior art has corresponding oxygenation method.Fig. 1 is the synoptic diagram that the oxygenation of prior art is handled.As shown in Figure 1, station boiler comprises (can also comprise low pressure heater, high pressure heater, water wall, superheater, reheater, gas-turbine etc., not shown in Fig. 1) such as condensate pump pump group 10, precision processing 11, deoxygenator 12, service pump 13, condensers 14.In the ingress of condensate pump pump group 10 pump intake oxygen table 15 is with fixed attention arranged, deoxygenator outlet oxygen table 16 is arranged in the exit of deoxygenator 12.First of OT mode adds the exit that oxygen point 17 is positioned at precision processing 11, and second adds the exit that oxygen point 18 is positioned at deoxygenator 12.Add oxygen point corresponding to MPa level system pressure, select the oxygenation system component of respective level parameter for use, feedwater is carried out 10
2Ug/L magnitude oxygenation.But the OT mode of prior art is in all inapplicable AVT (O) mode that maybe can not be used for of many aspects, for example, 1) the oxygenation point pressure is higher, the corresponding raising of system design installation requirement, and safety coefficient descends; 2) after the oxygenation point pressure improved, for the required micro-oxygen-adding amount of AVT (O) mode, volumetric flow rate was the order of magnitude and descends, and all brought obvious difficulty for selection, correction and the Flow-rate adjustment control of oxygenation system component; 3) be accurately to detect 2 oxygenations of control, need add first and second increases oxygen table and sampling spot thereof between oxygen point; 4) operating pressure that adds oxygen point is with the load noticeable change, and its pressure reduction variation tendency with the oxygenation system is just in time opposite with the required direction variation of oxygenation, unfavorable adjustment; 5) to promptly and accurately adjust oxygenation, need the complicated interlock TT﹠C system of design with load.
Summary of the invention
The technical problem that the present invention will solve provides a kind of water-supply oxygen supplementing device of station boiler, has higher security.
The invention provides a kind of water-supply oxygen supplementing device of station boiler, comprising: the measurement of oxygen content module is used to measure the dissolved oxygen content of ingress condensed water of the condensate pump pump group of station boiler; The oxygen that provides oxygenating required is provided oxygen source; The oxygen flow adjustment module is connected with oxygen source, can insert the ingress of condensate pump pump group, and the dissolved oxygen content that is used for exporting according to the measurement of oxygen content module is controlled the flow to the condensed water oxygenating.
According to an embodiment of oxygen supplementing device of the present invention, the oxygen source of described oxygen supplementing device comprises: oxygen cylinder is used to store oxygen; Oxygen pressure regulator is used to regulate the pressure from the Oxygen Flow of described oxygen cylinder output.Described oxygen flow adjustment module comprises: spinner-type flowmeter is used to measure the oxygen flow from oxygen source; The oxygen flow variable valve is used to regulate the oxygen flow from oxygen source; Oxygenating point segregaion valve links to each other with the ingress of the condensate pump pump group of described station boiler, is used for on/off oxygenating operation.
Further, above-mentioned oxygen flow variable valve is the oxygen flow motor-driven control valve.The measurement of oxygen content module comprises: coagulate pump intake oxygen table, be used to measure the dissolved oxygen content of pump intake place condensed water with fixed attention; Deoxygenator outlet oxygen table is used to measure the dissolved oxygen content of deoxygenator exit feedwater; The oxygenating controller is used for controlling described oxygen flow motor-driven control valve according to the dissolved oxygen content that the dissolved oxygen content and the described deoxygenator outlet oxygen table of the measurement of described pump intake oxygen table are with fixed attention measured.
The water-supply oxygen supplementing device of station boiler provided by the invention by the oxygenating point is reelected in the ingress of condensate pump pump group, is stable negative pressure, and total system is the normal pressure system, has high security.
The present invention also provides a kind of station boiler that comprises above-mentioned oxygen supplementing device.
Another technical problem that the present invention will solve provides a kind of water-supply oxygen supplementing method of station boiler, has higher security.
Oxygen replenishing method provided by the invention comprises: measure the dissolved oxygen content that coagulates the pump intake condensed water; According to the dissolved oxygen content that coagulates the pump intake condensed water condensed water is carried out oxygenating coagulating the pump intake place.
According to an embodiment of oxygen replenishing method of the present invention, this oxygen replenishing method also comprises: the dissolved oxygen content of measuring deoxygenator outlet feedwater.Coagulating the pump intake place, according to the dissolved oxygen content of pump intake condensed water and the dissolved oxygen content of deoxygenator outlet feedwater carry out oxygenating to condensed water with fixed attention.
Further, this oxygen replenishing method also comprises: provide oxygen by oxygen cylinder, public oxygen system or oxygenerator, regulated the pressure of output oxygen by the atmosphere gas pressure-regulator; Regulate oxygen supplying flow by the oxygen flow variable valve.
The oxygen replenishing method of station boiler provided by the invention by the oxygenating point being selected in pump intake place with fixed attention, is stable negative pressure, has high security.
Description of drawings
Fig. 1 is the synoptic diagram that the oxygenation of the station boiler of prior art is handled;
Fig. 2 is the synoptic diagram of the oxygenating point of station boiler of the present invention;
Fig. 3 is the block diagram of an embodiment of oxygen supplementing device of the present invention;
Fig. 4 is the block diagram of another embodiment of oxygen supplementing device of the present invention;
Fig. 5 is the block diagram of another embodiment of oxygen supplementing device of the present invention;
Fig. 6 is the schema of an example of oxygenating control of the present invention;
Fig. 7 is the schema of an embodiment of oxygen replenishing method of the present invention;
The schema of another embodiment of Fig. 8 oxygen replenishing method of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention wherein is described.In the accompanying drawings, identical label is indicated identical or similar element or assembly.
The present invention proposes a kind of new weak oxide processing (WOT) oxygenating mode.WOT oxygenating mode is followed two target upper limits of AVT (O) mode to the control of dissolved oxygen: condensed water dissolved oxygen≤30ug/L and deoxygenator outlet (or economizer inlet)≤10ug/L.Owing to above-mentioned two place's dissolved oxygens are too high corrosion risk is arranged all, thus oxygenating is formed following requirement: 1) at first control condensed water dissolved oxygen≤30ug/L, take precautions against corrosion risk; 2) deoxygenator outlet (or economizer inlet) should be controlled dissolved oxygen near upper limit 10ug/L, guarantees weak oxide treatment effect and conversion process as soon as possible.
Fig. 2 is the synoptic diagram of the oxygenating point of method and apparatus of the present invention.As shown in Figure 2,21 places are put in the oxygenating that the oxygenating point has been selected in before the condensate pump pump group 10, rather than first shown in Fig. 1 adds the position that oxygen point 17 and second adds oxygen point 18 places.
Fig. 3 is the block diagram of an embodiment of oxygen supplementing device of the present invention.As shown in Figure 3, the oxygen supplementing device 30 of station boiler of the present invention comprises oxygen source 31, oxygen flow adjustment module 32 and measurement of oxygen content module 33.Wherein, measurement of oxygen content module 33 links to each other with the ingress of condensate pump pump group, is used to measure the dissolved oxygen content of condensate pump pump group 10 ingress condensed water.Measurement of oxygen content module 33 can be a condensate pump inlet oxygen table.Oxygen source 31 is used to provide oxygen, can be oxygen cylinder, public oxygen system or oxygenerator.Oxygen flow adjustment module 32 links to each other with the inlet of oxygen source 31 with condensate pump pump group 10 respectively, is used for regulating oxygen supplying flow according to the dissolved oxygen content that measurement of oxygen content module 33 is measured.
According to another embodiment of oxygen supplementing device of the present invention, above-mentioned measurement of oxygen content module also is used to measure the dissolved oxygen content of station boiler economizer feedwater; Above-mentioned oxygen flow adjustment module is according to the dissolved oxygen content control of the condensed water dissolved oxygen content of the ingress of the condensate pump pump group of measurement of oxygen content module output and the economizer feedwater flow to the condensed water oxygenating.
Fig. 4 is the block diagram of another embodiment of oxygen supplementing device of the present invention.The water extraction pump pump group 10 of station boiler only is shown for the sake of brevity.As shown in Figure 4, the oxygen supplementing device 40 of station boiler of the present invention comprises oxygen cylinder 411, oxygen pressure regulator 412, rotor gauger 423, oxygen flow variable valve 422 and the oxygenating point segregaion valve 421 that connects successively.Oxygenating point segregaion valve links to each other with the inlet of condensate pump pump group 10.Oxygen supplementing device 40 also comprises pump intake oxygen table 43 with fixed attention.Oxygen cylinder 411 and oxygen pressure regulator 412 are formed the indefiniteness example of oxygen source 42.Rotor gauger 423, oxygen flow variable valve 422 and oxygenating point segregaion valve 421 are formed the indefiniteness example of oxygen flow adjustment module 42.The oxygenating point is positioned at the female tube inlet of condensate pump pump group, is provided with oxygenating point segregaion valve 421.Utilize this oxygen supplementing device, can put segregaion valve 421 by oxygenating and carry out the oxygenating on/off, manually carry out Flow-rate adjustment by oxygen flow variable valve 422.When carrying out Flow-rate adjustment, determine the oxygenating amount of needs, adjust oxygen flow variable valve 422 according to the oxygen flow shown in the spinner-type flowmeter 423 according to coagulating pump intake oxygen table 43.For example, the scope of oxygen pressure regulator 412 is a normal pressure, such as between 0.05-0.5MP, is preferably the special-purpose voltate regulator of 0.1MPa, and spinner-type flowmeter 423 is a float-type minimum gas under meter.This oxygen supplementing device is applicable to the continous-stable oxygenating.
WOT mode of the present invention in the transformation stage, can export oxygen according to deoxygenator and represent number when carrying out oxygenating control, and control condensed water dissolved oxygen is taken precautions against corrosion risk by standard max (30ug/L) operation, and the fastest conversion rate is provided simultaneously; Stable operation stage after conversion can export oxygen according to deoxygenator and represent number, adjusts control condensed water dissolved oxygen content, keeps deoxygenator outlet dissolved oxygen at standard max scope (as 7-10ug/L).
The oxygenating point of above-mentioned oxygen supplementing device is selected in fixed attention stablizes the negative pressure place on the preceding condensate pipe that flows of pump, selects the atmosphere gas pressure-regulator for use, and flow control valve is in the pressure-regulator downstream, makes its operating pressure and correcting state approaching; Above-mentioned design makes that pressure reduction keeps relative stability between SOS and condensed water, can not cause oxygen-adding amount and condensing water flow inverse change because of load variations; The work of under meter normal pressure, volumetric flow rate reaches 10
2The ml/min magnitude has enough accuracy and guarantees accurately regulation and control; The normal pressure system, safe.
According to another embodiment of oxygen supplementing device of the present invention, regulate the magnetic valve group with oxygen flow and come oxygen flow variable valve in the alternate figures 4.Oxygen flow is regulated the magnetic valve group between spinner-type flowmeter and oxygenating point segregaion valve.For example, be made up of the magnetic valve (K1, K2, K3) of three groups of flows through adjusting flow respectively in advance in proportion, ratio is K1:K2:K3=1:2:5 between the three, the oxygen supplying flow that realizes in proportion capable of being combined is than 0,1, and 2,3,5,6,7,8 (or 0%, 12.5%, 25%, 27.5%, 50%, 75%, 87.5%, 100%) 8 kinds of combinations.The on/off of oxygen and Flow-rate adjustment can manually be finished in a watchroom distant place, are applicable to according to condensing water flow, dissolved oxygen level to change distant place manual regulation.Those skilled in the art will appreciate that the oxygen supplying flow beguine can adopt other numerical value according to the needs of using.
Fig. 5 is the block diagram of another embodiment of oxygen supplementing device of the present invention.As shown in Figure 5, oxygen supplementing device 50 comprises oxygen cylinder 411, oxygen pressure regulator 412, rotor gauger 423, oxygen flow motor-driven control valve 522 and the oxygenating point segregaion valve 421 that connects successively.Oxygenating point segregaion valve 421 links to each other with the inlet of condensate pump pump group 10.Oxygen supplementing device 50 also comprises pump intake oxygen table 531, deoxygenator outlet oxygen table 532 and oxygenating controller 534 with fixed attention.Coagulate pump intake oxygen table 531 and be used to measure the dissolved oxygen amount of condensate pump pump inlet place condensed water, and export to oxygenating controller 534.Deoxygenator outlet oxygen table 532 is used to measure the dissolved oxygen amount of deoxygenator exit feedwater, and exports to oxygenating controller 534.Oxygenating controller 534 bases are come the input of self-solidifying pump intake oxygen table 531 and deoxygenator outlet oxygen table 532, definite oxygenating amount that needs, and oxygenating amount is as required adjusted oxygen flow motor-driven control valve 522 automatically.In addition, oxygen supplementing device 50 can also comprise condensing water flow meter 533, is used to measure the data on flows at condensate pump pump group place, and this data on flows is exported to oxygenating controller 534.Oxygenating controller 534 is according to the input that comes self-solidifying pump intake oxygen table 531, deoxygenator outlet oxygen table 532 and condensing water flow meter 533, and definite oxygenating amount that needs is regulated oxygen flow motor-driven control valve 522.Those skilled in the art will appreciate that in some applications oxygen supplementing device 50 can not comprise spinner-type flowmeter 423; Perhaps use other oxygen source alternate standard oxygen cylinder 411 and oxygen pressure regulators 412.By oxygen supplementing device 50, the on/off of oxygen and Flow-rate adjustment are carried out by the parameter of setting automatically by oxygenating controller 534, and control signal input is come the output of self-solidifying pump intake oxygen table 531, deoxygenator outlet oxygen table 532 and condensing water flow meter 533.Be applicable to that a distant place regulates automatically.
When WOT mode of the present invention is carried out oxygenating control, in the transformation stage, can export the dissolved oxygen data of oxygen table, the output of condensed water oxygen table and the data on flows of condensing water flow meter output according to deoxygenator, control condensed water dissolved oxygen is by standard max (30ug/L) operation, take precautions against corrosion risk, the fastest conversion rate is provided simultaneously; Stable operation stage after conversion, can export the dissolved oxygen data of oxygen table, the output of condensed water oxygen table and the data on flows of condensing water flow meter output according to deoxygenator, adjust control condensed water dissolved oxygen content, keep deoxygenator outlet dissolved oxygen at standard max scope (as 7-10ug/L).
Fig. 6 is the schema that carries out an example of oxygenating control according to oxygen supplementing device shown in Figure 5.
As shown in Figure 6, in step 602, gather O
EconomizeData.
In step 604, judge O
EconomizeWhether greater than 10 μ g/L, if, then continue performing step 610, otherwise, performing step 606 continued.
In step 606, input Q
Coagulate, set k, C
0, N
In step 608, regulate and control the oxygenating amount by following formula:
V
O2=(30-C
0, N) * Q
Coagulate* k (1).
In step 610, input O
Coagulate, Q
Coagulate, set k.
In step 612, regulate and control the oxygenating amount by following formula:
V
O2=(O
Coagulate-5) * Q
Coagulate* k (2).
In above-mentioned step, O
EconomizeBe economizer (deoxygenator outlet) dissolved oxygen meter reading, unit is μ g/L; O is condensed water dissolved oxygen meter reading with fixed attention, and unit is μ g/L; Q is condensing water flow with fixed attention, and unit is m3/h; K is O2 volumetric flow rate and a mass rate gain factor under 1 standard atmospheric pressure and the standard temperature (25 ℃); C0, N are condensed water dissolved oxygen amount baseline values, and unit is μ g/L, and it is the function of load N, get its history average and set.Above-mentioned steps 602 to 612 can circulate and carry out.
Fig. 7 is the schema of an embodiment of the oxygen replenishing method of station boiler of the present invention.
As shown in Figure 7, in step 702, measure the dissolved oxygen content that coagulates the pump intake condensed water.For example, measure dissolved oxygen content by coagulating pump intake oxygen table.
In step 704, coagulating the pump intake place, according to the dissolved oxygen content that coagulates the pump intake condensed water condensed water is carried out the oxygenating operation.According to the dissolved oxygen content that coagulates the pump intake condensed water, and the target of the dissolved oxygen content that reaches of expectation, need to determine the amount of oxygenating, and make the condensed water dissolved oxygen be no more than the condensed water dissolved oxygen level of standard code.For example control oxygen flow, thereby regulate the oxygenating amount from oxygen source by the oxygen flow variable valve.Above-mentioned steps 702 to 704 can circulate and carry out.
According to an embodiment of oxygen replenishing method of the present invention, above-mentioned oxygenating point is selected in fixed attention stablizes the negative pressure place on the preceding condensate pipe that flows of pump.Provide oxygen by standard oxygen gas cylinder, public oxygen system or oxygenerator as oxygen source, regulate the pressure of output oxygen by gas regulator.The gas regulator scope is a normal pressure, and scope is generally between 0.05-0.5MP.The oxygen flow variable valve is in the gas regulator downstream, makes its operating pressure and correcting state approaching.Above-mentioned design makes that pressure reduction keeps relative stability between SOS and condensed water, can not cause oxygen-adding amount and condensing water flow inverse change because of load variations.
Fig. 8 is the schema of another embodiment of the oxygen replenishing method of station boiler of the present invention.
As shown in Figure 8, in step 802, measure the dissolved oxygen content that coagulates the pump intake condensed water by the oxygen table.
In step 804, measure the dissolved oxygen content of deoxygenator outlet feedwater by the oxygen table.
In step 806, determine the oxygen supplying flow of needs according to the dissolved oxygen content of dissolved oxygen content that coagulates the pump intake condensed water and deoxygenator outlet feedwater.
In step 808, coagulating the pump intake place, by the oxygen flow of gas flow regulating valve adjusting, it is in the desired range of values from oxygen source.Other flow control valves can be various manually, magnetic valve or motor-driven control valve.Above-mentioned steps 802 to 808 can circulate and carry out.
The oxygen replenishing method of station boiler provided by the invention and device are used for feedwater weak oxide processing (or AVT (the O)) mode of power plant's high pressure high temperature turbosets, in order to replenish, adjust, the dissolved oxygen of control condensed water and economizer feedwater meets working condition requirement.The present invention has simplified system by selecting oxygenating point and flow adjustment design, has improved the security of system reliability; Stablize oxygenation pressure reduction, added oxygen flow and be not subjected to the unit load variable effect, simplified control; System component uses the normal pressure standard component, and flow control is accurate; Dissolved oxygen level safety does not have influence to system material.
WOT mode of the present invention is compared with the OT mode, has following characteristics: 1) oxygenating amount is little, and normal pressure only is 10
2The ml/min magnitude needs bigger volumetric flow rate to guarantee to adjust control accuracy; 2) oxygenating concentration is low, with the same magnitude of the normal dissolved oxygen content of condensed water, can consider its influence to materials such as precision processing resins, needn't consider it to coagulating the influence of pump operation, and the oxygenating point needn't design the medium voltage network after precision processing; 3) it is relatively stable that weak oxide processing oxygenating requires flow.The problem that the OT mode of prior art exists mainly comes from the oxygenation point selection.The pressure rating that adds oxygen point is brought a series of problems with load variations.The present invention is according to the oxygenating characteristics of WOT, change the oxygenating point, the oxygenating point is selected in fixed attention on the condensate pipe that flows before the pump, overcome the subject matter that the OT oxygenation of prior art exists, has following advantage: 1), be stable negative pressure by the oxygenating point being reelected on the condensate pipe that before coagulating pump, flows; 2) select normal pressure oxygen pressure-regulator for use, flow control valve is in the pressure-regulator downstream, make its operating pressure and correcting state approaching, it is comparatively accurate to show: 3) pressure reduction keeps relative stability between oxygen supplementing device and condensed water, can not make oxygen-adding amount and condensing water flow inverse change because of load variations; 4) under the normal pressure, the oxygenating volumetric flow rate reaches 10
2Ml/min magnitude, under meter have enough accuracy and guarantee accurately regulation and control; 5) be the normal pressure system, safe.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for specific end use.
Claims (11)
1. the water-supply oxygen supplementing device of a station boiler is characterized in that, comprising:
The measurement of oxygen content module is used to measure the dissolved oxygen content of ingress condensed water of the condensate pump pump group of station boiler;
The oxygen that provides oxygenating required is provided oxygen source;
The oxygen flow adjustment module is connected with described oxygen source, can insert the ingress of condensate pump pump group, and the dissolved oxygen content that is used for exporting according to described measurement of oxygen content module is controlled the flow to the condensed water oxygenating.
2. the water-supply oxygen supplementing device of station boiler according to claim 1 is characterized in that, described measurement of oxygen content module also is used to measure the dissolved oxygen content of station boiler economizer feedwater;
Described oxygen flow adjustment module is according to the dissolved oxygen content control of the condensed water dissolved oxygen content of the ingress of the condensate pump pump group of described measurement of oxygen content module output and the economizer feedwater flow to the condensed water oxygenating.
3. the water-supply oxygen supplementing device of station boiler according to claim 1 is characterized in that, described oxygen source comprises:
Oxygen cylinder is used to store oxygen;
Oxygen pressure regulator is used to regulate the pressure from the Oxygen Flow of described oxygen cylinder output.
4. the water-supply oxygen supplementing device of station boiler according to claim 1 is characterized in that, described oxygen flow adjustment module comprises:
Spinner-type flowmeter is used to measure the oxygen flow from oxygen source;
The oxygen flow variable valve is used to regulate the oxygen flow from oxygen source;
Oxygenating point segregaion valve links to each other with the ingress of the condensate pump pump group of described station boiler, is used for on/off oxygenating operation.
5. the water-supply oxygen supplementing device of station boiler according to claim 4 is characterized in that, described oxygen flow variable valve is that oxygen flow is regulated the magnetic valve group.
6. the water-supply oxygen supplementing device of station boiler according to claim 4 is characterized in that, described oxygen flow variable valve is the oxygen flow motor-driven control valve.
7. the water-supply oxygen supplementing device of station boiler according to claim 6 is characterized in that, described measurement of oxygen content module comprises:
Coagulate pump intake oxygen table, be used to measure the dissolved oxygen content of pump intake place condensed water with fixed attention;
Deoxygenator outlet oxygen table is used to measure the dissolved oxygen content of deoxygenator exit feedwater;
The oxygenating controller is used for controlling described oxygen flow motor-driven control valve according to the dissolved oxygen content that the dissolved oxygen content and the described deoxygenator outlet oxygen table of the measurement of described pump intake oxygen table are with fixed attention measured.
8. a station boiler is characterized in that, comprises as any described oxygen supplementing device in the claim 1 to 6.
9. the water-supply oxygen supplementing method of a station boiler is characterized in that, comprising:
Measure the dissolved oxygen content that coagulates the pump intake condensed water;
According to the dissolved oxygen content that coagulates the pump intake condensed water condensed water is carried out oxygenating at the described pump intake place of coagulating.
10. the water-supply oxygen supplementing method of station boiler according to claim 9 is characterized in that, also comprises:
Measure the dissolved oxygen content of deoxygenator outlet condensed water;
Comprise according to the step that the dissolved oxygen content that coagulates the pump intake condensed water carries out oxygenating to condensed water at the described pump intake place of coagulating:
At the described pump intake place of coagulating, according to the dissolved oxygen content of pump intake condensed water and the dissolved oxygen content of deoxygenator outlet feedwater carry out oxygenating to condensed water with fixed attention.
11. the water-supply oxygen supplementing method according to claim 9 or 10 described station boilers is characterized in that, also comprises:
Provide oxygen by oxygen cylinder, public oxygen system or oxygenerator, regulate the pressure of output oxygen by the atmosphere gas pressure-regulator;
Regulate oxygen supplying flow by the oxygen flow variable valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810180552XA CN101423282B (en) | 2008-12-01 | 2008-12-01 | Station boiler and water and oxygen supply apparatus and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810180552XA CN101423282B (en) | 2008-12-01 | 2008-12-01 | Station boiler and water and oxygen supply apparatus and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101423282A true CN101423282A (en) | 2009-05-06 |
| CN101423282B CN101423282B (en) | 2010-12-01 |
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| CN101851020A (en) * | 2010-04-29 | 2010-10-06 | 浙江省电力试验研究院 | DC boiler feed water selective oxidation treatment process |
| CN101880092A (en) * | 2010-05-27 | 2010-11-10 | 江苏省电力试验研究院有限公司 | Intrinsically-safe water-feeding and oxygen-adding treatment method of once-through boiler |
| CN102745753A (en) * | 2012-06-28 | 2012-10-24 | 浙江浙能能源技术有限公司 | Draining and oxygen adding device for full-automatic heater |
| WO2013138993A1 (en) * | 2012-03-20 | 2013-09-26 | 浙江省电力试验研究院 | Water-feeding and oxygen-adding treatment process for power station boiler |
| CN103387292A (en) * | 2013-06-08 | 2013-11-13 | 宁波富仕达电力工程有限责任公司 | Boiler supply water oxygenation process |
| CN106168814A (en) * | 2016-08-26 | 2016-11-30 | 浙江浙能嘉华发电有限公司 | A kind of feed water oxygenation system and simulation artificial intelligence's feed water oxygenation autocontrol method |
| CN113149119A (en) * | 2021-03-10 | 2021-07-23 | 华电电力科学研究院有限公司 | Accurate oxygenation control system of thermal power factory condensate water |
| 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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| RU2243165C1 (en) * | 2003-11-11 | 2004-12-27 | Ульяновский государственный технический университет | Method of vacuum deaeration of water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101851020A (en) * | 2010-04-29 | 2010-10-06 | 浙江省电力试验研究院 | DC boiler feed water selective oxidation treatment process |
| CN101851020B (en) * | 2010-04-29 | 2012-02-01 | 浙江省电力试验研究院 | DC boiler feed water selective oxidation treatment process |
| CN101880092A (en) * | 2010-05-27 | 2010-11-10 | 江苏省电力试验研究院有限公司 | Intrinsically-safe water-feeding and oxygen-adding treatment method of once-through boiler |
| CN101880092B (en) * | 2010-05-27 | 2012-07-04 | 江苏省电力试验研究院有限公司 | Intrinsically-safe water-feeding and oxygen-adding treatment method of once-through boiler |
| WO2013138993A1 (en) * | 2012-03-20 | 2013-09-26 | 浙江省电力试验研究院 | Water-feeding and oxygen-adding treatment process for power station boiler |
| US9714179B2 (en) | 2012-03-20 | 2017-07-25 | Z (P) Epc Electric Power Research Institute | Process for feed-water oxygenating treatment in boiler in power station |
| CN102745753A (en) * | 2012-06-28 | 2012-10-24 | 浙江浙能能源技术有限公司 | Draining and oxygen adding device for full-automatic heater |
| CN102745753B (en) * | 2012-06-28 | 2013-07-31 | 浙江浙能能源技术有限公司 | Draining and oxygen adding method for full-automatic heater |
| CN103387292A (en) * | 2013-06-08 | 2013-11-13 | 宁波富仕达电力工程有限责任公司 | Boiler supply water oxygenation process |
| CN106168814A (en) * | 2016-08-26 | 2016-11-30 | 浙江浙能嘉华发电有限公司 | A kind of feed water oxygenation system and simulation artificial intelligence's feed water oxygenation autocontrol method |
| CN113149119A (en) * | 2021-03-10 | 2021-07-23 | 华电电力科学研究院有限公司 | Accurate oxygenation control system of thermal power factory condensate water |
| 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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