CN106997213A - A kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems - Google Patents
A kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems Download PDFInfo
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- CN106997213A CN106997213A CN201710179784.2A CN201710179784A CN106997213A CN 106997213 A CN106997213 A CN 106997213A CN 201710179784 A CN201710179784 A CN 201710179784A CN 106997213 A CN106997213 A CN 106997213A
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- oxygen
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/139—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring a value related to the quantity of the individual components and sensing at least one property of the mixture
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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Abstract
The present invention relates to the operation method that a kind of oxygen-eliminating device automatically adjusts deoxygenation concentration systems, step includes setting up adder, setting up parameter acquiring unit, set up processing unit and set up driver element；Parameter acquiring unit first obtains oxygen content parameter from oxygen-eliminating device, then the oxygen content parameter regulation oxygen discharging door parameter that processing unit is obtained according to parameter acquiring unit, oxygen discharging door is adjusted according to the oxygen discharging door parameter after regulation for last driver element, controls oxygen content.Oxygen-eliminating device oxygen content is adjusted in real time by computer, oxygen discharging door aperture is adjusted for different confluents, so as to realize the regulation to oxygen content in oxygen-eliminating device, to cause the economy of water supply system under each different load operating mode of oxygen-eliminating device consumption vapour to reach preferable effect.
Description
Technical field
The present invention relates to the operation method that a kind of oxygen-eliminating device automatically adjusts deoxygenation concentration systems, belong to power field.
Background technology
Now with the growth of energy demand, some power plants are increasing to the oxygen scavenging ability demand of oxygen-eliminating device,
Seek more and more higher.Oxygen-eliminating device includes safety valve, exhaust outlet, condensation water inlet, pressure-measuring-point interface, startup exhaust in the prior art
Mouth, standby mouth, feedwater recycling interface, steam air heater drain port, manhole, heating steam inlet, high plus water delivery import, auxiliary steam
Import, feed pipe, standby mouth, liquid level sender interface, blowdown interface tube, feedwater recycling base, nitrogen charging base, probe tube,
Pressure gauge, dosing base, thermometer base, liquid-level switch interface, balance port, overfall, magnetic double level gauge base.Design
Automatic deaerations are installed on exhaust outlet.The displacement of deoxygenation head, be also influence one of oxygen-eliminating device oxygen scavenging ability it is very important
Factor, should ensure that the gas desorbed unobstructed can be drained, if the oxygen parsed in oxygen-eliminating device and other gases can not
Unobstructed drains, then because the oxygen amount remained in steam in oxygen-eliminating device is more, the speed that water oxygen can be influenceed to spread out, so that
Increase the residual oxygen content of water outlet.But, it is excessive that displacement can not be controlled, and this is due to that atomizing deoxygenation head itself is special
What point was determined；The deoxygenation head of this kind of mode, water is in oxygen removal process, and about 90% dissolved gas becomes minute bubbles effusion, its
Remaininging 10% will lean on diffusion, from water droplet diffusion inside to water drops surface after, could be taken away by steam, when water in it is vaporific when, for
The effusion of bubble is highly advantageous, and the water layer that bubble passes through is very thin, but very unfavorable for the diffusion process of dissolved gas, because
Small water droplet has very big surface tension, and dissolved gas is easily detected by the diffusion into the surface of small water droplet.Therefore excessive row
Vapour amount, is not necessarily that oxygen content is further reduced, substantial amounts of heat loss can be caused on the contrary.
Found after analyzing prior art, for oxygen-eliminating device, the oxygen-eliminating device oxygen content under different load operating mode
Difference is larger, the parameter such as it is with condensing water flow, feedwater flow, oxygen discharging door aperture, oxygen-eliminating device pressure, oxygen-eliminating device temperature exist compared with
Important Relations " are in the prior art when unit load is higher, and feedwater flow, condensing water flow typically also can be higher, now with machine
The increase of group load and oxygen-eliminating device oxygen discharging door is to maintain constant all the time, such result is exactly when unit load changes and change
The oxygen scavenging ability of oxygen-eliminating device declines to a great extent after change, influences deaerating effect, the security of unit, economy reduction.
Theoretically no matter under which kind of load condition the oxygen discharging door of oxygen-eliminating device to remain a suitable respective value just favourable
In raising oxygen-eliminating device deaerating effect, but at present in most power plant, the fortune of oxygen-eliminating device oxygen discharging door not with unit load
Row regulation is consistent.
Chinese patent 201010546302.0 discloses a kind of engine control system, and the system compares mould including oxygen
Block and regeneration control module.The oxygen concentration of engine exhaust is compared by oxygen comparison module with oxygen threshold value.Regeneration control module
Start the regeneration of particulate filter, and based on oxygen comparative result, and particulate filter load, particulate filter temperature and hair
In motivation speed at least one come control regeneration.The program can not be used in deoxygenation device in power field and design.
The content of the invention
It is an object of the invention to overcome above shortcomings in the prior art, and one kind is provided and passes through the row of automatically adjusting
Oxygen door aperture makes the corresponding random groups load variations of deoxygenation content, and overcomes remaining to disturb the influence that discharge oxygen content is brought, with
Unit loss is reduced, so that the oxygen-eliminating device for improving unit efficiency automatically adjusts the operation method of deoxygenation concentration systems.
The present invention the used technical scheme that solves the above problems is：A kind of oxygen-eliminating device automatically adjusts deoxygenation concentration systems
Operation method, it is characterised in that：Step includes setting up adder, sets up parameter acquiring unit, sets up processing unit and set up and drive
Moving cell；Parameter acquiring unit first obtains oxygen content parameter from oxygen-eliminating device, and then processing unit is according to parameter acquiring unit
The oxygen content parameter regulation oxygen discharging door parameter of acquisition, last driver element enters according to the oxygen discharging door parameter after regulation to oxygen discharging door
Row regulation, controls oxygen content；The oxygen content parameter that parameter acquiring unit is obtained includes oxygen-eliminating device internal liquid level overhead gas
In oxygen content, oxygen-eliminating device condensed in being fed water at oxygen content and low pressure feed water entrance at water inlet in condensate
Oxygen content in oxygen content, oxygen-eliminating device internal liquid level overhead gas is master variable, and oxygen-eliminating device condenses condensate at water inlet
In oxygen content and feedwater at low pressure feed water entrance in oxygen content be secondary variable；The signal of secondary variable is used as feedforward
Signal；By introducing FC in measurement process, oxygen-eliminating device is condensed into the variable quantity of Oxygen Dissolved in Condensate Gas content, low pressure at water inlet and given
The change of the variable quantity and the oxygen content in oxygen-eliminating device internal liquid level overhead gas of oxygen content in the feedwater of waterpipe porch
Amount imports adder, and the output result of adder acts on oxygen discharging door, and oxygen discharging door is used to adjust the oxygen content in oxygen-eliminating device.This
Parameter of the invention from the oxygen content in oxygen-eliminating device acquisition oxygen-eliminating device；Oxygen content parameter regulation oxygen discharging door in oxygen-eliminating device
The content of oxygen in aperture, control oxygen-eliminating device.Parameter acquiring unit is used to obtain the oxygen content in oxygen-eliminating device from oxygen-eliminating device
Parameter；Processing unit is used for the regulation parameter that oxygen discharging door is obtained according to oxygen content parameter；Driver element is used for according to deoxygenation
Oxygen discharging door is adjusted the regulation parameter of door, controls oxygen content.Parameter acquiring unit includes operational factor collection system of power plant
System.Oxygen content in condensate converts by condensing water flow, and the oxygen content in feedwater converts by feedwater flow.Oxygen discharging door is used
Oxygen content or oxygen concentration in regulation oxygen-eliminating device.
The present invention, which sets up processing unit, to be included setting up regulating system, and regulating system is used to drive actuator, and actuator is used for
Control oxygen discharging door；Processing unit is calculated as below：When the oxygen content that parameter acquiring unit is obtained from oxygen-eliminating device is micro- more than 7
G/l when, regulating system ﹢ signal codes increase, oxygen discharging door aperture increase, actuator action frequency is per minute to be no more than
5 times, until when the oxygen content that parameter acquiring unit is obtained from oxygen-eliminating device is equal to 7 micrograms per litre, the ﹢ signals of regulating system
Electric current and ﹣ signal codes are changed into 0, the stopping action of oxygen discharging door；The oxygen obtained when parameter acquiring unit from oxygen-eliminating device
When content is less than 7 micrograms per litre, the ﹣ signal codes increase of regulating system, oxygen discharging door is closed automatically, and actuator action frequency is every
Minute is no more than 5 times, until when the oxygen content that parameter acquiring unit is obtained from oxygen-eliminating device is equal to 7 micrograms per litre, regulating system
﹢ signal codes and ﹣ signal codes be changed into 0, the stopping action of oxygen discharging door.
Present invention regulation oxygen discharging door parameter includes the switching speed of regulation oxygen discharging door, and the switching speed of oxygen discharging door is by following step
Suddenly it is adjusted：When oxygen content is more than 24 micrograms per litre in oxygen-eliminating device, oxygen discharging door switching speed is oxygen content in oxygen-eliminating device
Five times of oxygen discharging door switching speed when being less than 24 micrograms per litre more than 7 micrograms per litres, actuator action frequency is per minute to be no more than 5
It is secondary, until when the oxygen content that parameter acquiring unit is obtained from oxygen-eliminating device is equal to 7 micrograms per litre, the ﹢ signal electricity of regulating system
Stream and ﹣ signal codes are 0, the stopping action of oxygen discharging door.According to the switching speed of oxygen content parameter regulation oxygen discharging door, from
And carry out row's Control for Oxygen Content.
The present invention, which sets up regulating system, to be included setting up hand-held block and sets up automatic module, and automatic mold is switched to by hand-held block
During block, the aperture disturbance quantity of oxygen discharging door is less than the 1% of deoxygenation gate valve position range, the output signal tracking oxygen discharging door of regulating system
Opening amount signal, tracking accuracy is less than the 1% of deoxygenation gate valve position range.When being switched to " automatic " state by " manual " state, oxygen discharging door is opened
Degree should keep constant, realize switching undisturbed, and disturbance quantity should be less than ± the 1% of deoxygenation gate valve position range.Meanwhile, regulating system is defeated
Oxygen discharging door valve opening signal should be tracked by going out signal, and tracking accuracy should be less than deoxygenation gate valve position range ± 1%.
Compared with prior art, the present invention can in real time be adjusted by computer to oxygen-eliminating device oxygen content, for difference
Load Regulation oxygen discharging door, so as to realize the regulation to deoxygenation content, improves deaerating effect, reduces steam discharge medium-loss and heat waste
Lose, improve the economy of unit.
Brief description of the drawings
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Fig. 2 is the system schematic of the embodiment of the present invention.
Fig. 3 is the parameter acquiring unit algorithm flow schematic diagram of the embodiment of the present invention.
Fig. 4 is the processing unit algorithm flow schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, following examples are to this hair
Bright explanation and the invention is not limited in following examples.
Embodiment.
Referring to Fig. 1 to Fig. 4.
The oxygen-eliminating device of the present embodiment automatically adjusts the operation method of deoxygenation concentration systems, initially sets up adder, sets up ginseng
Acquiring unit is counted, processing unit is set up and sets up driver element, is run as follows after the completion of foundation：1st, oxygen-eliminating device is passed through
Operational factor obtains the parameter of oxygen content in oxygen-eliminating device, wherein, this deoxygenation content is also generally all by periodic calibrating；
2nd, the parameter of oxygen content is calculated into processing unit in oxygen-eliminating device；3rd, the result calculated according to processing unit adjusts deoxygenation
Door 1, controls deoxygenation amount.Setting up processing unit includes setting up regulating system, and regulating system is used to drive actuator, and actuator is used for
Control oxygen discharging door 1.
According to the aperture of oxygen content parameter regulation oxygen discharging door 1 in oxygen-eliminating device, so as to carry out row's oxygen content control.Concrete operations root
It is adjusted according to following steps:When oxygen content is more than 7 micrograms per litre in oxygen-eliminating device, the ﹢ signal codes of regulating system increase
Greatly, the aperture of oxygen discharging door 1 is opened greatly automatically, actuator action frequency answer it is per minute be no more than 5 times, until oxygen-eliminating device in oxygen content
During equal to 7 micrograms per litre, the ﹢ signal codes and ﹣ signal codes of regulating system are changed into " 0 ", the stopping of oxygen discharging door 1 action；When
When oxygen content is less than 7 micrograms per litre in oxygen-eliminating device, " ﹣ " number signal code increase of regulating system, oxygen discharging door 1 is closed automatically,
Actuator action frequency answer it is per minute be no more than 5 times, until oxygen-eliminating device in oxygen content be equal to 7 micrograms per litre when, regulating system
﹢ signal codes and ﹣ signal codes are changed into " 0 ", the stopping of oxygen discharging door 1 action.
According to the switching speed of parameter regulation oxygen discharging door 1 of deoxygenation content, so as to carry out row's Control for Oxygen Content.Concrete operations root
It is adjusted according to following steps：When oxygen content is more than 24 micrograms per litre in oxygen-eliminating device, each opening speed of oxygen discharging door 1 is
5 times of each opening speed when oxygen content is more than 7 micrograms per litres less than 24 micrograms per litre in oxygen-eliminating device, actuator action frequency should
It is per minute to be no more than 5 times.The definite value of processing unit can be according to the concrete condition of unit by setting the big of biasing adjustment definite value
It is small.
Regulating system includes hand-held block and automatic module.When being switched to " automatic " state by " manual " state, the valve of oxygen discharging door 1
Door aperture should keep constant, realize switching undisturbed, and disturbance quantity should be less than the 1% of the valve of oxygen discharging door 1 position range.Meanwhile, regulating system
Output signal should track the valve opening signal of oxygen discharging door 1, tracking accuracy answers the 1% of the small valve of oxygen discharging door 1 position range.
The oxygen-eliminating device that the present embodiment is set up, which automatically adjusts deoxygenation concentration systems, includes parameter acquiring unit, processing unit and drive
Moving cell.Driver element drives oxygen discharging door 1.
Parameter acquiring unit is used for the parameter that deoxygenation content is obtained from the operational factor of oxygen-eliminating device, wherein, parameter acquiring
Unit can be power plant's operational factor acquisition system；Real-time deoxygenation content parameter, parameter acquiring list can be automatically obtained by system
Oxygen content parameter includes oxygen content, the oxygen-eliminating device in collection oxygen-eliminating device internal liquid level overhead gas in the oxygen-eliminating device that member is obtained
Condense Oxygen Dissolved in Condensate Gas content at water inlet（Condensing water flow）, feed water at low pressure feed water entrance in oxygen content（Give
Water-carrying capacity）, the oxygen content in oxygen-eliminating device internal liquid level overhead gas is master variable, and oxygen-eliminating device is condensed at water inlet in condensate
Oxygen content is secondary variable in being fed water at oxygen content, low pressure feed water entrance.The signal of secondary variable draws as feed-forward signal
Enter to make fluctuation of the system to oxygen content in condensate and feedwater to have and stronger overcome ability.Oxygen-eliminating device condensate incoming condensing water
Middle oxygen content（Condensing water flow）, low pressure feed water entrance feedwater in oxygen content（Feedwater flow）Fluctuation be to cause to remove
One factor of oxygen device oxygen content change, is interference effect, and FC is introduced by measurement process, and oxygen-eliminating device condenses and coagulated at water inlet
Bear water middle oxygen content（Condensing water flow）Difference, low pressure feed water entrance feedwater in oxygen content（Feedwater flow）Change
The positive interaction regulation of the difference of change amount and the difference of the oxygen content in oxygen-eliminating device internal liquid level overhead gas enters adder, plus
Musical instruments used in a Buddhist or Taoist mass output result acts on the regulation oxygen-eliminating device oxygen content of oxygen discharging door 1（Concentration）.
Processing unit is used for the parameter that adjusted oxygen discharging door 1 is calculated according to the parameter of deoxygenation content, wherein, processing unit
It can rely on as computer.
Driver element is used to oxygen discharging door 1 is adjusted according to the parameter of oxygen discharging door 1, controls deoxygenation content, wherein, driving
Unit directly drives oxygen discharging door 1.
By above-described embodiment, oxygen-eliminating device deoxygenation content can in real time be adjusted by computer, it is negative for difference
Lotus and unit disturbance adjusting oxygen discharging door 1, so that the regulation to deoxygenation content is realized, to cause oxygen-eliminating device to consume the economy of steam turbine group
Reach preferable effect.
Furthermore, it is necessary to explanation, the specific embodiment described in this specification, is named the shape of its parts and components
Title etc. can be different, and the above content described in this specification is only to structure example explanation of the present invention.It is all according to
The equivalence changes or simple change done according to the construction described in inventional idea of the present invention, feature and principle, are included in this hair
In the protection domain of bright patent.Those skilled in the art can do various to described specific embodiment
The modification of various kinds or supplement or using similar mode substitute, without departing from the present invention structure or surmount present claims
Scope defined in book, all should belong to protection scope of the present invention.
Claims (4)
1. a kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems, it is characterised in that：Step include set up adder,
Parameter acquiring unit is set up, processing unit is set up and sets up driver element；Parameter acquiring unit first obtains oxygen from oxygen-eliminating device
Content parameter, the oxygen content parameter regulation oxygen discharging door parameter that then processing unit is obtained according to parameter acquiring unit, most rear-guard
Oxygen discharging door is adjusted according to the oxygen discharging door parameter after regulation for moving cell, controls oxygen content；What parameter acquiring unit was obtained
Oxygen content, the oxygen-eliminating device that oxygen content parameter is included in oxygen-eliminating device internal liquid level overhead gas are condensed at water inlet in condensate
Oxygen content and low pressure feed water entrance at feed water in oxygen content, the oxygen in oxygen-eliminating device internal liquid level overhead gas
Content is master variable, and oxygen-eliminating device is condensed in the oxygen content at water inlet in condensate and the feedwater at low pressure feed water entrance
Oxygen content is secondary variable；The signal of secondary variable is used as feed-forward signal；By introducing FC in measurement process, by oxygen-eliminating device condensate
The variable quantity of Oxygen Dissolved in Condensate Gas content at import, fed water at low pressure feed water entrance in oxygen content variable quantity and deoxygenation
The variable quantity of oxygen content in device internal liquid level overhead gas imports adder, and the output result of adder acts on deoxygenation
Door, oxygen discharging door is used to adjust the oxygen content in oxygen-eliminating device.
2. oxygen-eliminating device according to claim 1 automatically adjusts the operation method of deoxygenation concentration systems, it is characterised in that：Set up
Processing unit includes setting up regulating system, and regulating system is used to drive actuator, and actuator is used to control oxygen discharging door；Processing unit
It is calculated as below：When the oxygen content that parameter acquiring unit is obtained from oxygen-eliminating device is more than 7 micrograms per litre, the ﹢ of regulating system
The increase of number signal code, the aperture increase of oxygen discharging door, actuator action frequency is per minute to be no more than 5 times, until parameter acquiring list
When the oxygen content that member is obtained from oxygen-eliminating device is equal to 7 micrograms per litre, the ﹢ signal codes and ﹣ signal codes of regulating system are equal
It is changed into 0, the stopping action of oxygen discharging door；When the oxygen content that parameter acquiring unit is obtained from oxygen-eliminating device is less than 7 micrograms per litre,
The ﹣ signal codes increase of regulating system, oxygen discharging door is closed automatically, and actuator action frequency is per minute to be no more than 5 times, until ginseng
When the oxygen content that number acquiring unit is obtained from oxygen-eliminating device is equal to 7 micrograms per litre, the ﹢ signal codes of regulating system and No. ﹣ letter
Number electric current is changed into 0, the stopping action of oxygen discharging door.
3. oxygen-eliminating device according to claim 2 automatically adjusts the operation method of deoxygenation concentration systems, it is characterised in that：Regulation
Oxygen discharging door parameter includes the switching speed of regulation oxygen discharging door, and the switching speed of oxygen discharging door is adjusted as follows：Work as deoxygenation
When oxygen content is more than 24 micrograms per litre in device, oxygen discharging door switching speed is less than for oxygen content in oxygen-eliminating device more than 7 micrograms per litres
Five times of oxygen discharging door switching speed during 24 micrograms per litre, actuator action frequency is per minute to be no more than 5 times, until parameter acquiring list
When the oxygen content that member is obtained from oxygen-eliminating device is equal to 7 micrograms per litre, the ﹢ signal codes and ﹣ signal codes of regulating system are equal
For 0, the stopping action of oxygen discharging door.
4. oxygen-eliminating device according to claim 3 automatically adjusts the operation method of deoxygenation concentration systems, it is characterised in that：Set up
Regulating system includes setting up hand-held block and sets up automatic module, when being switched to automatic module by hand-held block, the aperture of oxygen discharging door
Disturbance quantity is less than the 1% of deoxygenation gate valve position range, and the output signal of regulating system tracks the opening amount signal of oxygen discharging door, tracking accuracy
Less than the 1% of deoxygenation gate valve position range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179784.2A CN106997213A (en) | 2017-03-23 | 2017-03-23 | A kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179784.2A CN106997213A (en) | 2017-03-23 | 2017-03-23 | A kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems |
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| CN106997213A true CN106997213A (en) | 2017-08-01 |
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|---|---|---|---|
| CN201710179784.2A Pending CN106997213A (en) | 2017-03-23 | 2017-03-23 | A kind of oxygen-eliminating device automatically adjusts the operation method of deoxygenation concentration systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484013A (en) * | 2019-09-11 | 2021-03-12 | 上海梅山钢铁股份有限公司 | Deaerator exhaust steam automatic regulation and waste heat utilization device |
| CN112960723A (en) * | 2021-02-22 | 2021-06-15 | 西安热工研究院有限公司 | Control system for dynamically switching into deaerator heating system based on time |
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| CN100999338A (en) * | 2006-12-29 | 2007-07-18 | 哈尔滨双龙水处理技术开发有限公司 | Power generator internal cooling water oxygen removal or electrolemma microalkalination treatment device and its treatment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112484013A (en) * | 2019-09-11 | 2021-03-12 | 上海梅山钢铁股份有限公司 | Deaerator exhaust steam automatic regulation and waste heat utilization device |
| CN112484013B (en) * | 2019-09-11 | 2022-10-14 | 上海梅山钢铁股份有限公司 | Deaerator exhaust steam automatic regulation and waste heat utilization device |
| CN112960723A (en) * | 2021-02-22 | 2021-06-15 | 西安热工研究院有限公司 | Control system for dynamically switching into deaerator heating system based on time |
| CN112960723B (en) * | 2021-02-22 | 2023-01-10 | 西安热工研究院有限公司 | Control system for dynamically switching into deaerator heating system based on time |
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Application publication date: 20170801 |