CN103712195A - Flue gas temperature adjusting method, device and system - Google Patents
Flue gas temperature adjusting method, device and system Download PDFInfo
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- CN103712195A CN103712195A CN201410004247.0A CN201410004247A CN103712195A CN 103712195 A CN103712195 A CN 103712195A CN 201410004247 A CN201410004247 A CN 201410004247A CN 103712195 A CN103712195 A CN 103712195A
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Abstract
The invention provides a flue gas temperature adjusting method, device and system. The method comprises the steps of receiving a boiler load signal to be used as a feedforward signal, receiving a turbidity signal of an outlet of a dust remover to be used as a feedback signal, generating an adjusting signal according to the feedforward signal and the feedback signal, and adjusting the water amount of a heat exchange loop and the operation mode and the parameter of dust remover control equipment through the adjusting signal. The water amount on the heat exchange loop and the temperature of flue gas are adjusted according to the adjusting signal, and meanwhile the operation mode and the parameter of the dust remover control equipment are adjusted according to the adjusting signal. The flue gas temperature of an inlet of the dust remover can directly influence the working efficiency of the dust remover, and thus the flue gas temperature of the inlet of the dust remover can not be too high. In order to achieve environment-friendly emission reduction, the turbidity of the outlet of the dust remover further needs to be limited, and the turbidity of the outlet of the dust remover is used as highest priority feedback information for conducting closed-loop control. The working state of a flue gas waste heat utilization device is considered, and the working state of the dust remover is also considered.
Description
Technical field
The present invention relates to energy-conserving and environment-protective control technology field, particularly a kind of flue-gas temperature control method, Apparatus and system.
Background technology
The reasons such as in prior art, heat power plant boiler is due to actual coal-fired and design coal deviation to some extent, and unit is aging cause exhaust gas temperature up to 130 ℃-150 ℃; Can install flue gas waste heat utilization device (claiming again low-level (stack-gas) economizer) additional at air preheater and deduster porch like this.
Flue gas waste heat utilization device is only considered Mist heat recovering, and there is no to consider the impact on downstream deduster.If because the cigarette temperature of deduster entrance is too high, the fly ash resistivity in deduster is 10
11～10
12between Ω cm; The violent spark discharge of so easy appearance, the unfavorable operating mode such as anti-corona, the operating efficiency of deduster is not good.
After flue gas waste heat utilization device has reclaimed heat, although flue-gas temperature is reduced, be conducive to the work of gathering dust of deduster, not necessarily make deduster be operated in optimum Working.Deduster long-term work, under off-design operating mode, will have a strong impact on efficiency of dust collection and the service life of deduster.
In order to solve above technical problem, there are at present following two kinds of solutions:
The first: detect the flue-gas temperature of deduster entrance, control and spray into the water yield in deduster inlet flue duct according to the flue-gas temperature of measuring, reduce the flue-gas temperature of deduster entrance, more manually adjust the running parameter of deduster;
The second: detect the flue-gas temperature of deduster entrance, directly regulate the operational factor of deduster control appliance according to the flue-gas temperature of measuring.
Above two kinds of methods all can not make deduster be operated in preferably duty, can not make flue gas waste heat utilization device be operated in preferably duty.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of flue-gas temperature control method, Apparatus and system, can make flue gas waste heat utilization device and deduster be operated in preferably duty.
The embodiment of the present invention provides a kind of flue-gas temperature control method, comprises the following steps:
Receive boiler load signal as feed-forward signal;
Receive the turbidity signal of deduster outlet as feedback signal;
According to described feed-forward signal and feedback signal, generate conditioning signal;
By described conditioning signal, regulate the water yield size and the method for operation and the parameter that regulate deduster control appliance on heat-exchanging loop.
Preferably, described feedback signal also comprises: the entrance flue gas temperature signal of flue gas waste heat utilization device and exit gas temperature signal.
Preferably, describedly by described conditioning signal, regulate the water yield on heat-exchanging loop size, be specially:
The size that regulates the water yield on heat-exchanging loop by the aperture of electric control valve on adjusting heat-exchanging loop or the frequency of freq uency conversion supercharging pump;
The described method of operation and the parameter that is regulated deduster control appliance by conditioning signal, is specially:
Regulate the method for operation and the current limitation of deduster mesohigh control appliance.
Preferably, described according to described feed-forward signal and feedback signal generation conditioning signal, be specially:
Described feed-forward signal and feedback signal are controlled to generate conditioning signal through fuzzy.
Preferably, also comprise: receive the water yield signal of flue gas waste heat utilization device import and the water yield signal that flue gas waste heat utilization device is come in and gone out;
When abnormal, reporting to the police appears in the water yield signal of the water yield signal of described flue gas waste heat utilization device import and flue gas waste heat utilization device outlet.
The embodiment of the present invention also provides a kind of flue gas temperature regulating device, comprising: feed-forward signal receiver module, feedback signal receiver module, conditioning signal generation module and control module;
Described feed-forward signal receiver module, for receiving boiler load signal, described boiler load signal is as feed-forward signal;
Described feedback signal receiver module, for receiving the turbidity signal of deduster outlet, described turbidity signal is as feedback signal;
Described conditioning signal generation module, for generating conditioning signal according to described feed-forward signal and described feedback signal;
Described control module, for being regulated the water yield size and the method for operation and the parameter that regulate deduster control appliance on heat-exchanging loop by described conditioning signal.
Preferably, also comprise: entrance flue gas temperature detection module and exit gas temperature detection module;
Described entrance flue gas temperature detection module, for detection of flue gas waste heat utilization device entrance flue gas temperature, generates flue gas waste heat utilization device entrance flue gas temperature signal;
Described exit gas temperature detection module, for detection of flue gas waste heat utilization device exit gas temperature, generates flue gas waste heat utilization device exit gas temperature signal;
Described feedback signal receiver module, also for receiving entrance flue gas temperature signal and the exit gas temperature signal of described flue gas waste heat utilization device.
Preferably, described control module comprises control submodule, be used for the size that regulates the water yield on heat-exchanging loop by the aperture of electric control valve on adjusting heat-exchanging loop or the frequency of freq uency conversion supercharging pump, also for regulating the method for operation and the current limitation of deduster high voltage control equipment.
The embodiment of the present invention also provides a kind of smoke temperature adjusting system, comprising: flue gas waste heat utilization device, deduster, boiler and controller;
Described flue gas waste heat utilization device is exported to described deduster for the flue gas of boiler emission is carried out to waste heat recovery later;
Described deduster, for carrying out dust removal process by the flue gas of described flue gas waste heat utilization device output;
Described controller, for receiving boiler load signal as feed-forward signal; Receive the turbidity signal of deduster outlet as feedback signal; According to described feed-forward signal and feedback signal, generate conditioning signal; By described conditioning signal, regulate the size of the water yield on heat-exchanging loop and the method for operation and the current limitation that regulate deduster high voltage control equipment in flue gas waste heat utilization device.
Preferably, described feedback signal also comprises: the entrance flue gas temperature signal of flue gas waste heat utilization device and exit gas temperature signal;
Described turbidity signal is measured by the flue dust transmissometer or the dust concentration instrument that are arranged on deduster outlet;
The entrance flue gas temperature signal of described flue gas waste heat utilization device and exit gas temperature signal are by being separately positioned on the temperature element of flue gas waste heat utilization device entrance and the temperature element of outlet measures.
Compared with prior art, the present invention has the following advantages:
In the present embodiment, pass through boiler load signal as feed-forward signal, and the turbidity signal of deduster outlet is realized the closed-loop control of flue-gas temperature as feedback signal, by feed-forward signal and feedback signal, generate conditioning signal, the size of the water yield in conditioning signal adjusting flue gas waste heat utilization device on heat-exchanging loop, thereby regulate the temperature of flue gas, according to conditioning signal, adjust the method for operation and the parameter of deduster control appliance simultaneously.Because the flue-gas temperature of deduster entrance directly can affect the operating efficiency of deduster, therefore, the flue-gas temperature of deduster entrance can not be too high.In addition, in order to realize the reduction of discharging of environmental protection, also need to limit the turbidity of deduster outlet, in the present embodiment, the turbidity of deduster outlet is carried out to closed-loop control as the highest feedback information of priority.Both take into account the duty of flue gas waste heat utilization device, considered again the duty of deduster.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is flue-gas temperature control method embodiment provided by the invention mono-flow chart;
Fig. 2 is flue-gas temperature control method embodiment provided by the invention bis-flow charts;
Fig. 3 is flue gas temperature regulating device embodiment mono-schematic diagram provided by the invention;
Fig. 4 is flue gas temperature regulating device embodiment bis-schematic diagrames provided by the invention;
Fig. 5 is smoke temperature adjusting system embodiment mono-schematic diagram provided by the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Embodiment of the method one:
Referring to Fig. 1, this figure is flue-gas temperature control method embodiment provided by the invention mono-flow chart.
The flue-gas temperature control method that the present embodiment provides, comprises the following steps:
S101: receive boiler load signal as feed-forward signal;
It should be noted that, boiler load signal is generally directly obtained by boiler control system, and boiler control system sends to by boiler load signal the controller that flue gas waste heat utilization device is corresponding.
In the present embodiment, using boiler load signal as feed-forward signal, because the unit of boiler is in different size, the load of operation is different, and boiler operatiopn operating mode is also different, and correspondingly corresponding flue-gas temperature and the water yield is not identical yet.For example, the unit of boiler can be 200MW unit, 300MW unit or 600MW unit.
Generally, the load of boiler is metastable, using boiler load signal as feed-forward signal to controller as controlling parameter, improve the rapid response speed of controller.
S102: receive the turbidity signal of deduster outlet as feedback signal;
Because environmental protection is at present as top priority, therefore, need to consider the outlet turbidity of deduster, in the present embodiment, be that the turbidity signal of deduster outlet is done to closed-loop control as feeding back signal to controller.
S103: generate conditioning signal according to described feed-forward signal and feedback signal;
S104: regulate the water yield size and the method for operation and the parameter of adjusting deduster control appliance on heat-exchanging loop by described conditioning signal.
According to the difference of actual device, in some devices, be by electric control valve, to realize the adjusting of the water yield, in some devices, be by freq uency conversion supercharging pump, to realize the adjusting of the water yield.Concrete regulative mode can be realized according to the distinct device in actual device.
In device, install be electric control valve time, can be by regulating the aperture of electric control valve can realize the adjusting of water yield size.
In device, install be freq uency conversion supercharging pump time, can be by regulating the frequency of freq uency conversion supercharging pump realize the big or small adjusting of the water yield.It should be noted that, by regulating the size of the water yield on heat-exchanging loop can realize the adjusting of flue-gas temperature.Thereby control the temperature of flue gas waste heat utilization device outlet and the temperature of deduster entrance.
In the present embodiment, pass through boiler load signal as feed-forward signal, and the turbidity signal of deduster outlet is realized the closed-loop control of flue-gas temperature as feedback signal, by feed-forward signal and feedback signal, generate conditioning signal, the size of the water yield in conditioning signal adjusting flue gas waste heat utilization device on heat-exchanging loop, thereby regulate the temperature of flue gas, according to conditioning signal, adjust the method for operation and the parameter of deduster control appliance simultaneously.Because the flue-gas temperature of deduster entrance directly can affect the operating efficiency of deduster, therefore, the flue-gas temperature of deduster entrance can not be too high.In addition, in order to realize the reduction of discharging of environmental protection, also need to limit the turbidity of deduster outlet, in the present embodiment, the turbidity of deduster outlet is carried out to closed-loop control as the highest feedback information of priority.Take into account the duty of flue gas waste heat utilization device, considered again the duty of deduster.
Embodiment of the method two:
Referring to Fig. 2, this figure is flue-gas temperature control method embodiment provided by the invention bis-flow charts.
S201 is identical with S101, does not repeat them here.
S202: the entrance flue gas temperature signal and the exit gas temperature signal that receive flue gas waste heat utilization device;
S203 is identical with S102, does not repeat them here.
It should be noted that, S203 and S202 do not have sequencing.
S204: generate conditioning signal by described boiler load signal, the turbidity signal of deduster outlet, entrance flue gas temperature and the exit gas temperature signal of flue gas waste heat utilization device;
In some devices, being by electric control valve, to realize the adjusting of the water yield, is by freq uency conversion supercharging pump, to realize the adjusting of the water yield in some devices
S205: realize the adjusting of the water yield size on heat-exchanging loop by the adjusting aperture of electric control valve or the frequency of freq uency conversion supercharging pump, also need to regulate the method for operation and the current limitation of deduster high voltage control equipment.
Described in S204, according to described feed-forward signal and feedback signal, generate conditioning signal, be specially: described feed-forward signal and feedback signal are controlled to generate conditioning signal through fuzzy.
In the embodiment of the present invention, can also comprise: receive the water yield signal of flue gas waste heat utilization device import and the water yield signal of flue gas waste heat utilization device outlet;
When abnormal, reporting to the police appears in the water yield signal of coming in and going out when the water yield signal of described flue gas waste heat utilization device import and flue gas waste heat utilization device.
It should be noted that, detect the water yield of flue gas waste heat utilization device import and the water yield of outlet, is for whether the duty of monitoring arrangement is normal, rather than in order to control its duty.
Correspondingly, whether the duty for monitoring arrangement in the present embodiment is normal, also needs to measure inlet water temperature and the outlet water temperature of flue gas waste heat utilization device.
It should be noted that, in the present embodiment, after considering the turbidity information of deduster outlet, also consider entrance flue gas temperature and the exit gas temperature of flue gas waste heat utilization device, both considered energy-conservationly, considered again reduction of discharging.So-called energy-saving and emission-reduction pattern that Here it is, and embodiment corresponding to Fig. 1 is reduction of discharging pattern.
A kind of flue-gas temperature control method providing based on above embodiment, the embodiment of the present invention also provides a kind of flue gas temperature regulating device, below in conjunction with accompanying drawing, is described in detail.
Device embodiment mono-:
Referring to Fig. 3, this figure is flue gas temperature regulating device embodiment mono-schematic diagram provided by the invention.
The flue gas temperature regulating device that the present embodiment provides, comprising: feed-forward signal receiver module 301, feedback signal receiver module 302, conditioning signal generation module 303 and control module 304;
Described feed-forward signal receiver module 301, for receiving boiler load signal, described boiler load signal is as feed-forward signal;
It should be noted that, boiler load signal is generally directly obtained by boiler control system, and boiler control system sends to by boiler load signal the controller that flue gas waste heat utilization device is corresponding.
In the present embodiment, using boiler load signal as feed-forward signal, because the unit of boiler is in different size, the load of operation is different, and boiler operatiopn operating mode is also different, and correspondingly corresponding flue-gas temperature and the water yield is not identical yet.For example, the unit of boiler can be 200MW unit, 300MW unit or 600MW unit.
Generally, the load of boiler is metastable, using boiler load signal as feed-forward signal to controller as controlling parameter, improve the rapid response speed of controller.
Described feedback signal receiver module 302, for receiving the turbidity signal of deduster outlet, described turbidity signal is as feedback signal;
Because environmental protection is at present as top priority, therefore, need to consider the outlet turbidity of deduster, in the present embodiment, be that the turbidity signal of deduster outlet is done to closed-loop control as feedback signal to controller.
Described conditioning signal generation module 303, for generating conditioning signal according to described feed-forward signal and described feedback signal;
Described control module 304, for being regulated the water yield size and the method for operation and the parameter of adjusting deduster control appliance on heat-exchanging loop by described conditioning signal.
According to the difference of actual device, in some devices, be by electric control valve, to realize the adjusting of the water yield, in some devices, be by freq uency conversion supercharging pump, to realize the adjusting of the water yield.Concrete regulative mode can be realized according to the distinct device in actual device.
In device, install be electric control valve time, can be by regulating the aperture of electric control valve can realize the adjusting of water yield size.
In device, install be freq uency conversion supercharging pump time, can be by regulating the frequency of freq uency conversion supercharging pump realize the big or small adjusting of the water yield.
It should be noted that, by regulating the size of the water yield on heat-exchanging loop can realize the adjusting of flue-gas temperature.Thereby control the temperature of flue gas waste heat utilization device outlet and the temperature of deduster entrance.
In the present embodiment, pass through boiler load signal as feed-forward signal, and the turbidity signal of deduster outlet is realized the closed-loop control of flue-gas temperature as feedback signal, by feed-forward signal and feedback signal, generate conditioning signal, the size of the water yield in conditioning signal adjusting flue gas waste heat utilization device on heat-exchanging loop, thereby regulate the temperature of flue gas, according to conditioning signal, adjust the method for operation and the parameter of deduster control appliance simultaneously.Because the flue-gas temperature of deduster entrance directly can affect the operating efficiency of deduster, therefore, the flue-gas temperature of deduster entrance can not be too high.In addition, in order to realize the reduction of discharging of environmental protection, also need to limit the turbidity of deduster outlet, in the present embodiment, the turbidity of deduster outlet is carried out to closed-loop control as the highest feedback information of priority.Take into account the duty of flue gas waste heat utilization device, considered again the duty of deduster.
Device embodiment bis-:
Referring to Fig. 4, this figure is flue gas temperature regulating device embodiment bis-schematic diagrames provided by the invention.
It should be noted that, device embodiment mono-provides the flue gas temperature regulating device that works in reduction of discharging pattern, and that introduces that the embodiment of the present invention provides below can reduce discharging and flue gas temperature regulating device that can be energy-conservation.
Be understandable that, what the turbidity signal of the deduster of take outlet was adjustment criteria is reduction of discharging pattern, and existing turbidity signal has flue gas waste heat utilization device entrance and exit temperature, is energy-saving and emission-reduction patterns.
The device that the present embodiment provides, also comprises: entrance flue gas temperature detection module 401 and exit gas temperature detection module 402;
Described entrance flue gas temperature detection module 401, for detection of flue gas waste heat utilization device entrance flue gas temperature, generates flue gas waste heat utilization device entrance flue gas temperature signal;
Described exit gas temperature detection module 402, for detection of flue gas waste heat utilization device exit gas temperature, generates flue gas waste heat utilization device exit gas temperature signal;
Described feedback signal receiver module 302, also for receiving entrance flue gas temperature signal and the exit gas temperature signal of described flue gas waste heat utilization device.
Described conditioning signal generation module 303, for generating conditioning signal according to described turbidity signal and described flue gas waste heat utilization device entrance flue gas temperature signal and flue gas waste heat utilization device exit gas temperature signal;
Described conditioning signal generation module 303 controls to generate conditioning signal by described feed-forward signal and feedback signal through fuzzy.
Described control module comprises controls submodule 304a, be used for the size that regulates the water yield on heat-exchanging loop by the aperture of electric control valve on adjusting heat-exchanging loop or the frequency of freq uency conversion supercharging pump, according to conditioning signal, regulate the method for operation and the current limitation of deduster high voltage control equipment simultaneously.
In the embodiment of the present invention, can also comprise: receive the water yield signal of flue gas waste heat utilization device import and the water yield signal of flue gas waste heat utilization device outlet;
When abnormal, reporting to the police appears in the water yield signal of coming in and going out when the water yield signal of described flue gas waste heat utilization device import and flue gas waste heat utilization device.
It should be noted that, detect the water yield of flue gas waste heat utilization device import and the water yield of outlet, is for whether the duty of monitoring arrangement is normal, rather than in order to control its duty.
Correspondingly, whether the duty for monitoring arrangement in the present embodiment is normal, also needs to measure inlet water temperature and the outlet water temperature of flue gas waste heat utilization device.
It should be noted that, in the present embodiment, after considering the turbidity information of deduster outlet, also consider entrance flue gas temperature and the exit gas temperature of flue gas waste heat utilization device, both considered energy-conservationly, considered again reduction of discharging.
A kind of flue-gas temperature control method and the device that based on above embodiment, provide, the embodiment of the present invention also provides a kind of smoke temperature adjusting system, below in conjunction with accompanying drawing, is described in detail.
System embodiment one:
Referring to Fig. 5, this figure is smoke temperature adjusting system embodiment mono-schematic diagram provided by the invention.
The smoke temperature adjusting system that the present embodiment provides, comprising: flue gas waste heat utilization device 500, deduster 600, boiler 700 and controller 800;
Described flue gas waste heat utilization device 500 is exported to described deduster for the flue gas of boiler 700 discharges is carried out to waste heat recovery later;
Described deduster 600, for carrying out dust removal process by the flue gas of described flue gas waste heat utilization device 500 outputs;
Described controller 800, for the load signal that receives boiler 700 as feed-forward signal; Receive the turbidity signal of deduster 600 outlets as feedback signal; According to described feed-forward signal and feedback signal, generate conditioning signal; By described conditioning signal, regulate the size of the water yield on heat-exchanging loop and the method for operation and the parameter of adjusting deduster control appliance in flue gas waste heat utilization device 500.
It should be noted that, the load signal of boiler 700 is generally directly obtained by boiler control system, and boiler control system sends to by boiler load signal the controller that flue gas waste heat utilization device is corresponding.
In the present embodiment, using boiler load signal as feed-forward signal, because the unit of boiler is in different size, the load of operation is different, and boiler operatiopn operating mode is also different, and correspondingly corresponding flue-gas temperature and the water yield is not identical yet.For example, the unit of boiler can be 200MW unit, 300MW unit or 600MW unit.
Generally, the load of boiler is metastable, using boiler load signal as feed-forward signal to controller as controlling parameter, improve the rapid response speed of controller.
Because environmental protection is at present as top priority, therefore, need to consider the outlet turbidity of deduster, in the present embodiment, be that the turbidity signal of deduster outlet is done to closed-loop control as feedback signal to controller.
According to the difference of actual device, in some devices, be by electric control valve, to realize the adjusting of the water yield, in some devices, be by freq uency conversion supercharging pump, to realize the adjusting of the water yield.Concrete regulative mode can be realized according to the distinct device in actual device.
In device, install be electric control valve time, can be by regulating the aperture of electric control valve can realize the adjusting of water yield size.
In device, install be freq uency conversion supercharging pump time, can be by regulating the frequency of freq uency conversion supercharging pump realize the big or small adjusting of the water yield.
It should be noted that, by regulating the size of the water yield on heat-exchanging loop can realize the adjusting of flue-gas temperature.Thereby control the temperature of flue gas waste heat utilization device outlet and the temperature of deduster entrance.
In the present embodiment, pass through boiler load signal as feed-forward signal, and the turbidity signal of deduster outlet is realized the closed-loop control of flue-gas temperature as feedback signal, by feed-forward signal and feedback signal, generate conditioning signal, the size of the water yield in conditioning signal adjusting flue gas waste heat utilization device on heat-exchanging loop, thereby regulate the temperature of flue gas, according to conditioning signal, adjust the method for operation and the parameter of deduster control appliance simultaneously.Because the flue-gas temperature of deduster entrance directly can affect the operating efficiency of deduster, therefore, the flue-gas temperature of deduster entrance can not be too high.In addition, in order to realize the reduction of discharging of environmental protection, also need to limit the turbidity of deduster outlet, in the present embodiment, the turbidity of deduster outlet is carried out to closed-loop control as the highest feedback information of priority.Take into account the duty of flue gas waste heat utilization device, considered again the duty of deduster.
It should be noted that, be that the flue gas of reduction of discharging pattern regulates in system embodiment one, and another embodiment of the present invention also provides a kind of flue gas of energy-saving and emission-reduction pattern to regulate.
The smoke temperature adjusting system that the present embodiment provides, described feedback signal also comprises: the entrance flue gas temperature signal of flue gas waste heat utilization device and exit gas temperature signal;
Described turbidity signal is measured by the flue dust transmissometer or the dust concentration instrument that are arranged on deduster outlet;
The entrance flue gas temperature signal of described flue gas waste heat utilization device and exit gas temperature signal are by being separately positioned on the temperature element of flue gas waste heat utilization device entrance and the temperature element of outlet measures.
Described controller 800, for the turbidity signal of the load signal by boiler 700, deduster 600 outlets, and the entrance flue gas temperature signal of flue gas waste heat utilization device and exit gas temperature signal generation conditioning signal; By described conditioning signal, regulate the size of the water yield on heat-exchanging loop and the method for operation and the current limitation of adjusting deduster high voltage control equipment in flue gas waste heat utilization device 500.
It should be noted that, in the present embodiment, after considering the turbidity information of deduster outlet, also consider entrance flue gas temperature and the exit gas temperature of flue gas waste heat utilization device, both considered energy-conservationly, considered again reduction of discharging.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (10)
1. a flue-gas temperature control method, is characterized in that, comprises the following steps:
Receive boiler load signal as feed-forward signal;
Receive the turbidity signal of deduster outlet as feedback signal;
According to described feed-forward signal and feedback signal, generate conditioning signal;
By described conditioning signal, regulate the water yield size and the method for operation and the parameter that regulate deduster control appliance on heat-exchanging loop.
2. flue-gas temperature control method according to claim 1, is characterized in that, described feedback signal also comprises: the entrance flue gas temperature signal of flue gas waste heat utilization device and exit gas temperature signal.
3. flue-gas temperature control method according to claim 1 and 2, is characterized in that, describedly by described conditioning signal, regulates the water yield on heat-exchanging loop size, is specially:
The size that regulates the water yield on heat-exchanging loop by the aperture of electric control valve on adjusting heat-exchanging loop or the frequency of freq uency conversion supercharging pump;
The described method of operation and the parameter that is regulated deduster control appliance by conditioning signal, is specially:
Regulate the method for operation and the current limitation of deduster mesohigh control appliance.
4. flue-gas temperature control method according to claim 1 and 2, is characterized in that, described according to described feed-forward signal and feedback signal generation conditioning signal, is specially:
Described feed-forward signal and feedback signal are controlled to generate conditioning signal through fuzzy.
5. flue-gas temperature control method according to claim 1, is characterized in that, also comprises: receive the water yield signal of flue gas waste heat utilization device import and the water yield signal that flue gas waste heat utilization device is come in and gone out;
When abnormal, reporting to the police appears in the water yield signal of the water yield signal of described flue gas waste heat utilization device import and flue gas waste heat utilization device outlet.
6. a flue gas temperature regulating device, is characterized in that, comprising: feed-forward signal receiver module, feedback signal receiver module, conditioning signal generation module and control module;
Described feed-forward signal receiver module, for receiving boiler load signal, described boiler load signal is as feed-forward signal;
Described feedback signal receiver module, for receiving the turbidity signal of deduster outlet, described turbidity signal is as feedback signal;
Described conditioning signal generation module, for generating conditioning signal according to described feed-forward signal and described feedback signal;
Described control module, for being regulated the water yield size and the method for operation and the parameter that regulate deduster control appliance on heat-exchanging loop by described conditioning signal.
7. flue gas temperature regulating device according to claim 6, is characterized in that, also comprises: entrance flue gas temperature detection module and exit gas temperature detection module;
Described entrance flue gas temperature detection module, for detection of flue gas waste heat utilization device entrance flue gas temperature, generates flue gas waste heat utilization device entrance flue gas temperature signal;
Described exit gas temperature detection module, for detection of flue gas waste heat utilization device exit gas temperature, generates flue gas waste heat utilization device exit gas temperature signal;
Described feedback signal receiver module, also for receiving entrance flue gas temperature signal and the exit gas temperature signal of described flue gas waste heat utilization device.
8. according to the flue gas temperature regulating device described in claim 6 or 7, it is characterized in that, described control module comprises control submodule, be used for the size that regulates the water yield on heat-exchanging loop by the aperture of electric control valve on adjusting heat-exchanging loop or the frequency of freq uency conversion supercharging pump, also for regulating the method for operation and the current limitation of deduster high voltage control equipment.
9. a smoke temperature adjusting system, is characterized in that, comprising: flue gas waste heat utilization device, deduster, boiler and controller;
Described flue gas waste heat utilization device is exported to described deduster for the flue gas of boiler emission is carried out to waste heat recovery later;
Described deduster, for carrying out dust removal process by the flue gas of described flue gas waste heat utilization device output;
Described controller, for receiving boiler load signal as feed-forward signal; Receive the turbidity signal of deduster outlet as feedback signal; According to described feed-forward signal and feedback signal, generate conditioning signal; By described conditioning signal, regulate the size of the water yield on heat-exchanging loop and the method for operation and the current limitation that regulate deduster high voltage control equipment in flue gas waste heat utilization device.
10. smoke temperature adjusting system according to claim 9, is characterized in that, described feedback signal also comprises: the entrance flue gas temperature signal of flue gas waste heat utilization device and exit gas temperature signal;
Described turbidity signal is measured by the flue dust transmissometer or the dust concentration instrument that are arranged on deduster outlet;
The entrance flue gas temperature signal of described flue gas waste heat utilization device and exit gas temperature signal are by being separately positioned on the temperature element of flue gas waste heat utilization device entrance and the temperature element of outlet measures.
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| CN114384797A (en) * | 2022-01-05 | 2022-04-22 | 内蒙古大唐国际锡林浩特发电有限责任公司 | Steam temperature control method for thermal power plant |
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