CN109737377A - Control device, method and boiler system - Google Patents
Control device, method and boiler system Download PDFInfo
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- CN109737377A CN109737377A CN201811468406.7A CN201811468406A CN109737377A CN 109737377 A CN109737377 A CN 109737377A CN 201811468406 A CN201811468406 A CN 201811468406A CN 109737377 A CN109737377 A CN 109737377A
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Abstract
The embodiment of the present application provides a kind of control device, method and boiler system.The device is applied to the boiler plant including drum, which includes detection unit, control unit and the regulating valve of communication connection.Regulating valve is arranged between the small pump and drum for supplying water for drum, for controlling the refill flow for carrying out moisturizing to drum.Control unit and detection unit and regulating valve communicate to connect, for being adjusted according to the water level value in the current aperture of regulating valve, the refill flow value of the boiler plant of detection unit transmission, steam stream magnitude and drum to the aperture of regulating valve, so that the water level in drum is within the scope of preset height.The aperture of regulating valve is controlled according to the current aperture of regulating valve, refill flow value, steam stream magnitude and water level value, it is ensured that the water level in drum maintains within the limits prescribed, and then guarantees that steam output is stablized.
Description
Technical field
This application involves control technology fields, in particular to a kind of control device, method and boiler system.
Background technique
Steam boiler all plays an increasingly important role in industry, life as steam driven device is provided.
Can the control system of boiler be related to that can boiler normally run, steadily export steam.Currently, the control about boiler
Technology is more original, typically when steam water-level is extremely low, directly controls small pump and is worked with maximum power to carry out moisturizing；
When water level reaches the upper limit because of moisturizing in drum, control small pump stops working.Above-mentioned control mode transports boiler in production
In row other than steam output is unstable, it can also cause energy waste, a series of problems, such as disposal of pollutants is serious.Steam output
It is unstable gently then influence to produce, cause the operation of the equipment such as air conditioner, steam turbine to be fluctuated, it is heavy then lead to pressure in boiler drum
It goes beyond the limit of, explosion accident occurs.The stabilization of steam output or not depend primarily on the control of boiler drum level.Therefore steam
Can boiler drum level be effectively controlled, and export steam steadily in the range of a guarantee technique and equipment safety,
For automatic control profession for be one must in face of the problem of.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the embodiment of the present application be designed to provide a kind of control device,
Method and boiler system, can be according to the current aperture of regulating valve, refill flow value, steam stream magnitude and water level value to adjusting
The aperture of valve is controlled, and to guarantee that the water level in drum maintains within the limits prescribed, and then guarantees that steam output is stablized.
In a first aspect, the embodiment of the present application provides a kind of control device, it is applied to boiler plant, the boiler plant includes
Drum, described device include detection unit, control unit and the regulating valve of communication connection；
The detection unit is arranged on pipeline, obtains refill flow value, the steam stream of the boiler plant for detecting
Water level value in magnitude and the drum, and obtained the refill flow value, steam stream magnitude and water level value are sent to control
Unit processed；
The regulating valve is arranged between the small pump and the drum for supplying water for the drum, for controlling to institute
State the refill flow that drum carries out moisturizing；
Described control unit and the regulating valve communicate to connect, for the current aperture according to the regulating valve, moisturizing stream
Magnitude, steam stream magnitude and water level value are adjusted the aperture of the regulating valve, so that the water level in the drum is default
In altitude range.
Optionally, in the embodiment of the present application, the detection unit includes water level detecting subelement,
The water level detecting subelement is used to detect the water position status in the drum, to obtain the water level value, and will
The water level value is sent to described control unit.
Optionally, in the embodiment of the present application, the detection unit further includes steam flowrate testing subelement and moisturizing stream
Measure detection sub-unit；
The steam outlet of the drum is arranged in the steam flowrate testing subelement, for detecting steam flow shape
The steam stream magnitude to obtain the steam stream magnitude, and is sent to described control unit by state；
The refill flow detection sub-unit is arranged between the regulating valve and the drum, for detecting through the tune
Refill flow state of the valve to the drum moisturizing is saved, to obtain the refill flow value, and the refill flow value is sent
To described control unit.
Optionally, in the embodiment of the present application, described control unit includes adjuster and controller；
The adjuster and the water level detecting subelement, steam flowrate testing subelement, refill flow detection sub-unit,
Regulating valve and controller communication connection, for according to the current of the water level value, steam stream magnitude, refill flow value and regulating valve
Aperture generates control instruction, and the control instruction is sent to the controller；
The controller and the regulating valve communicate to connect, for controlling opening for the regulating valve according to the control instruction
Degree.
Optionally, in the embodiment of the present application, the adjuster includes master selector and secondary controller；
The master selector and the water level detecting subelement and secondary controller communicate to connect, for according to the water level value
The first control instruction is generated, and first control instruction is sent to the secondary controller；
The secondary controller and the master selector, refill flow detection sub-unit, are adjusted steam flowrate testing subelement
Valve and controller communication connection, for according to the current aperture of the refill flow value, steam stream magnitude and regulating valve to described
Control parameter relevant to the aperture of the regulating valve is adjusted in first control instruction, to generate the second control instruction, and
Second control instruction is sent to the controller；
The controller, for being adjusted according to second control instruction to the aperture of the regulating valve.
Optionally, in the embodiment of the present application, described control unit further includes square root extractor；
The square root extractor and the steam flowrate testing subelement, refill flow detection sub-unit and secondary controller communication link
It connects, for handling the steam stream magnitude and refill flow value, and processing result is sent to the secondary controller；
The secondary controller, for the current aperture according to the processing result and the regulating valve to first control
Instruction is adjusted.
Optionally, in the embodiment of the present application, the detection unit further includes transmitter；
The transmitter and the water level detecting subelement and master selector communicate to connect, for the water level detecting is sub
The water level value that unit is sent is sent to the master selector after being converted to electric signal.
Optionally, in the embodiment of the present application, the control device further includes alarm；
The alarm and the controller communicate to connect, for what is generated according to the controller based on the water level value
Alarm command is alarmed.
Second aspect, the embodiment of the present application also provide a kind of control method, applied to above-mentioned control device, the method
Include:
Obtain the water level value in refill flow value, steam stream magnitude and the drum of the boiler plant；
According to the current aperture of regulating valve and the refill flow value, steam stream magnitude and water level value to the regulating valve
Aperture is adjusted, so that the water level in drum is within the scope of preset height.
The third aspect, the embodiment of the present application provide a kind of boiler system, and the boiler system includes boiler plant and above-mentioned
Control device, the control device be used for according to the current aperture of the regulating valve, refill flow value, steam stream magnitude and water
Place value is adjusted the aperture of the regulating valve, and the water level in the drum of the boiler plant is made to be in preset height range
It is interior.
In terms of existing technologies, the application has the advantages that
The embodiment of the present application provides a kind of control device, method and boiler system.The control device is used for including drum
Boiler plant controlled.The control device includes detection unit, control unit and regulating valve.Detection unit is arranged in boiler
On the pipeline of equipment, connect with control unit unit communication, for by detection obtain the boiler plant refill flow value,
Water level value in steam stream magnitude and the drum, and the obtained refill flow value, steam stream magnitude and water level value are sent out
Give control unit.The regulating valve is arranged between the small pump and the drum for the drum moisturizing, for controlling
Make the refill flow that moisturizing is carried out to the drum.Described control unit and the detection unit and regulating valve communicate to connect, and use
According to the current aperture of the regulating valve, refill flow value, steam stream magnitude and water level value to the aperture of the regulating valve into
Row adjustment, so that the water level in the drum is within the scope of preset height.It can currently opening according to regulating valve using above-mentioned apparatus
Degree, refill flow value, steam stream magnitude and water level value control the aperture of regulating valve, to guarantee that the water level in drum maintains
Within the limits prescribed, and then guarantee that steam output is stablized.
For enable application above objects, features, and advantages be clearer and more comprehensible, the application preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is one of the block diagram of control device provided by the embodiments of the present application.
Fig. 2 is the two of the block diagram of control device provided by the embodiments of the present application.
Fig. 3 is the three of the block diagram of control device provided by the embodiments of the present application.
Fig. 4 is the flow diagram of control method provided by the embodiments of the present application.
Fig. 5 is the structural schematic diagram of boiler system provided by the embodiments of the present application.
Icon: 10- boiler system；100- control device；110- detection unit；111- water level detecting subelement；112- becomes
Send device；114- steam flowrate testing subelement；115- refill flow detection sub-unit；120- control unit；121- adjuster；
122- master selector；123- secondary controller；125- controller；127- square root extractor；130- regulating valve；140- alarm；210- vapour
Packet；220- burner hearth；230- burner；250- small pump.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Ground description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Usually exist
The component of the embodiment of the present application described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on embodiments herein, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Application product using when the orientation or positional relationship usually put, be merely for convenience of description the application and simplify description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as the limitation to the application.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
With reference to the accompanying drawing, it elaborates to some embodiments of the application.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Fig. 1 is please referred to, Fig. 1 is one of the block diagram of control device 100 provided by the embodiments of the present application.The control
Device 100 is applied to boiler plant, which includes drum.The control device 100 includes detection unit 110, control
Unit 120 and regulating valve 130.The associated conduit of boiler plant is arranged in (for example, sending to the drum in the detection unit 110
The pipeline of water) on, it is communicated to connect with described control unit 120, for detecting the refill flow value for obtaining the boiler plant, steaming
The water level value of steam flow magnitude and the water in the drum, and the refill flow value, steam stream magnitude and the water level value that will be obtained
It is sent to described control unit 120.Regulating valve 130 is arranged between the small pump for supplying water for drum and the drum, uses
The flow of the water of drum is flowed in control, i.e. control refill flow.Described control unit 120 and the detection unit 110 and tune
It saves valve 130 to communicate to connect, for obtaining the current aperture of the regulating valve 130, and for according to the current of the regulating valve 130
Aperture, refill flow value, steam stream magnitude and water level value are adjusted the aperture of the regulating valve 130.It can make in drum as a result,
Water level maintain within the scope of preset height, and then guarantee steam output stablize.
Wherein, drum is the critical component of boiler plant, for storing certain water, increases the water capacity of evaporation equipment
Product, it is ensured that the safety of water circulation.
Incorporated by reference to referring to Fig. 2, Fig. 2 is the two of the block diagram of control device 100 provided by the embodiments of the present application.At this
In embodiment, the detection unit 110 may include water level detecting subelement 111.The water level detecting subelement 111 is for examining
The water position status in the drum is surveyed, to obtain the water level value, and the water level value is sent to and water level detecting
The described control unit 120 that unit 111 communicates to connect.
Wherein, specific device and setting as long as the water level value can be obtained, as the water level detecting subelement 111
It position can be determines according to actual conditions.The setting position of the water level detecting subelement 111 can be according to the device actually used
Part determines.For example, the water level detecting subelement 111 uses float level meter in an embodiment of the present embodiment.
Referring once again to Fig. 2, in the present embodiment, the detection unit 110 can also include that steam flowrate testing is single
Member 114 and refill flow detection sub-unit 115.The steaming in the drum can be set in the steam flowrate testing subelement 114
At vapor outlet, for detecting steam flow state, to obtain the steam stream magnitude, and the steam stream magnitude is sent to
With the described control unit 120 of the steam flowrate testing subelement 114 communication connection.
The pipeline between the regulating valve 130 and the drum can be set in the refill flow detection sub-unit 115
On, for detecting the flow status for flowing to the water of the drum through the regulating valve 130, to obtain refill flow value, and will
The refill flow value is sent to the described control unit 120 with the refill flow detection sub-unit 115 communication connection.
It is detected at the different location of the boiler plant using the detection unit 110 as a result, so that the control
Unit 120 processed obtains the water level value, steam stream magnitude, refill flow value.Simultaneously because described control unit 120 and the tune
Section valve 130 is directly connected to, therefore described control unit 120 can directly obtain the current aperture of the regulating valve 130.By upper
Mode is stated, described control unit 120 obtains multiple related datas with the aperture of adjustment regulating valve 130.
Optionally, the detection unit 110 can also include temperature detection subelement, and temperature detection subelement setting exists
The steam outlet of boiler plant is sent to described control unit 120 for detecting vapor (steam) temperature, and by the vapor (steam) temperature.It should
Control unit 120 can show the vapor (steam) temperature.
Referring once again to Fig. 2, in the present embodiment, the adjustable device 121 of described control unit 120 and controller 125.Institute
State adjuster 121 and the water level detecting subelement 111, steam flowrate testing subelement 114, refill flow detection sub-unit
115, regulating valve 130 and controller 125 communicate to connect, for according to the water level value, steam stream magnitude, refill flow value and tune
The current aperture for saving valve 130 generates control instruction, and the control instruction is sent to the controller 125.The controller
125 communicate to connect with the regulating valve 130, for controlling the aperture of the regulating valve 130 according to the control instruction.
Further, incorporated by reference to referring to Fig. 3, Fig. 3 is the block diagram of control device 100 provided by the embodiments of the present application
Three.In the present embodiment, the adjuster 121 may include master selector 122 and secondary controller 123, master selector 122 with
Secondary controller 123 is cascaded structure.The master selector 122 is communicated with the water level detecting subelement 111 and secondary controller 123
First control instruction for generating the first control instruction according to the water level value, and is sent to the secondary adjusting by connection
Device 123.The secondary controller 123 and the master selector 122, steam flowrate testing subelement 114, refill flow detection are single
Member 115, regulating valve 130 and controller 125 communicate to connect, for according to the refill flow value, steam stream magnitude and regulating valve
130 current aperture is adjusted control parameter relevant to the aperture of the regulating valve 130 in first control instruction,
To generate the second control instruction, and second control instruction is sent to the controller 125.The controller 125, is used for
It is adjusted according to aperture of second control instruction to the regulating valve 130.
It can thus be seen that the master selector 122 can be according to the water level value when the water level value is lower than certain value
The first control instruction for carrying out larger adjustment to regulating valve 130 is generated, greatly to be adjusted to regulating valve 130
It is whole.It include control parameter relevant to 130 aperture of regulating valve in first control instruction.For example, regulating valve 130 at this time
Aperture is 10%, include in the first control instruction that the master selector 122 generates 130 aperture of regulating valve is adjusted to 50% this
One information.
The secondary controller 123, can be according to the refill flow value, steam flow after receiving the first control instruction
The current aperture of value and regulating valve 130 judges whether to need to be finely adjusted the control parameter in the first control instruction.If being not required to
It wants, the secondary controller 123 is directly sent to the controller for first control instruction as second control instruction
125.If desired, the secondary controller 123 can then be finely adjusted the control parameter in first control instruction, for example,
Control parameter is adjusted in ± 2% 50%, i.e., control parameter adjusted is 48%~52%.It will be understood
, for carrying out level-one regulation according to the water level value, secondary controller 123 is used for according to the moisturizing stream master selector 122
The current aperture of magnitude, steam stream magnitude and regulating valve 130 carries out second level regulation, and specific control methods can be according to the actual situation
It determines.
Referring once again to Fig. 3, in the present embodiment, described control unit 120 can also include square root extractor 127.It is described to open
Square device 127 and 123 communication link of the steam flowrate testing subelement 114, refill flow detection sub-unit 115 and secondary controller
It connects, for handling the steam stream magnitude and refill flow value, and processing result is sent to the secondary controller
123.The secondary controller 123, for the current aperture according to the processing result and the regulating valve 130 to first control
System instruction is adjusted.For example, the processing result and the regulating valve 130 can be previously stored in the secondary controller 123
Current aperture ratio and the corresponding relationship of processing mode can be according to place corresponding with the ratio after obtaining the ratio
The determination of reason mode does not adjust the control parameter in first control instruction, or the adjustment increased, or reduced
Adjustment.
Wherein, square root extractor 127 is the output device proportional to the root of input variable, for carrying out to obtained signal
Extracting operation, linearly to reflect the numerical value of variable.
Referring once again to Fig. 3, in the present embodiment, the detection unit 110 can also include transmitter 112.The change
It send device 112 and the water level detecting subelement 111 and master selector 122 to communicate to connect, is used for the water level detecting subelement
111 water level values sent are sent to the master selector 122 after being converted to electric signal.Wherein, transmitter
(transmitter) 112 be that the output signal of sensor is changed into (or to be inputted sensor by the signal that controller identifies
Non electrical quantity be converted into electric signal simultaneously amplify so as to for a distant place measure and control signal source) converter.
Referring once again to Fig. 3, in the present embodiment, the control device 100 can also include alarm 140.The master
The water level value can be sent to controller through the secondary controller 123 after receiving the water level value by adjuster 122
125, which can also be transmitted directly to the controller 125.The controller 125 is determining vapour based on the water level value
When water level in packet is too high or too low or is in other state of emergency, alarm command can be generated, and alarm command is sent to
The alarm 140 is alarmed.Optionally, which can be combined aural and visual alarm.
In an embodiment of the present embodiment, the controller 125 can also carry out the working condition of small pump
Control.Optionally, the instruction that is controlled the small pump can be to be generated by master selector 122, is also possible to by pair
What adjuster 123 generated, it can also be by controller 125 itself generation.
Optionally, in an embodiment of the present embodiment, the steam flowrate testing subelement 114 is orifice flow
Meter, the refill flow detection sub-unit 115 are vortex-shedding meter, and the controller 125 is PLC (Programmable
Logic Controller, programmable logic controller (PLC)).
Referring to figure 4., Fig. 4 is the flow diagram of control method provided by the embodiments of the present application.The control method is answered
For the control device 100.The method includes the steps S110 and step S120.
Step S110 obtains the water level value in refill flow value, steam stream magnitude and the drum of the boiler plant.
Step S120, according to the current aperture of regulating valve and the refill flow value, steam stream magnitude and water level value to institute
The aperture for stating regulating valve is adjusted, so that the water level in drum is within the scope of preset height.
It can currently opening based on refill flow value, steam stream magnitude, water level value and regulating valve using above-mentioned control device 100
Degree is adjusted control valve opening, to adjust refill flow, maintains steam water-level within the limits prescribed, and then maintains to steam
Stripping temperature is stablized, and guarantees the economic row of burning, maintains vapour pressure constant, can exercise supervision to production process.
It is the structural representation of boiler system 10 provided by the embodiments of the present application incorporated by reference to referring to Fig.1~Fig. 3 and Fig. 5, Fig. 5
Figure.The boiler system 10 includes the control device 100 and boiler plant.The boiler plant includes drum 210.The control
Device 100 is used for according to the current aperture of the regulating valve 130, refill flow value, steam stream magnitude and water level value to the tune
The aperture of section valve 130 is adjusted, and is in the water level in the drum 210 of the boiler plant within the scope of preset height.
The boiler plant can also include burner hearth 220 and burner 230.The burner 230 and the controller 125
Communication connection, for the control according to controller 125 and with burner hearth 220 with the offer of drum 210 being combined on burner hearth 220
Heat, to obtain steam.
The small pump 250 and the controller 125 communicate to connect, for being that drum 210 mentions according to the control of controller 125
For the water for generating steam.
The concrete composition of boiler system 10 is illustrated below.
The parameter of the boiler plant are as follows: operating pressure 1MPa, evaporation capacity 20T/h, normal duty 10T/h, peak load wave
Dynamic 240kg/min, maximum stage fluctuate 30mm, water level tolerance ± 10mm, and dynamic characteristic is thought of as single order, and time constant is
5s, static amplification factor are 8.
Small pump 250: for centrifugal multistage pump multiple centrifugal pump, feed pressure 0.5Mpa, discharge capacity 25T/h, constant speed operating, by regulating valve
130 adjust flow.Refill flow detection sub-unit 115: for vortex-shedding meter, range 0-25m3/ h, output signal 4-
20mADC, model E+H PROWIRL 72F40.Steam flowrate testing subelement 114: for orifice flowmeter, range 0-30T/
H, output signal 4-20mADC, on from+1151 transmitter of instrument.Temperature detection subelement: 0-300 DEG C of thermocouple, output signal 4-
20mADC.230: Li Ya road RS130 gas burner of burner.Water level detecting subelement 111: from instrument on float level meter
200.Regulating valve 130: the electronic two-way control valve of Siemens VVF31.50+SKD60.Controller 125: siemens PLC series
PLC。
It is the most important most important device of influence operated normally for it in entire boiler system 10 above.Secondary controller
123 select proportional controller, proportionality coefficient P=-4；Master selector 122 selects proportional and integral controller, proportionality coefficient P=3.5, integral
Coefficient I=10.
In conclusion the embodiment of the present application provides a kind of control device, method and boiler system.The control device for pair
Boiler plant including drum is controlled.The control device includes detection unit, control unit and regulating valve.Detection unit is set
It sets on the pipeline of boiler plant, is connect with control unit unit communication, for obtaining the benefit of the boiler plant by detection
Water level value in water flow value, steam stream magnitude and the drum, and by the obtained refill flow value, steam stream magnitude and
Water level value is sent to control unit.The regulating valve be arranged in for for the drum moisturizing small pump and the drum it
Between, for controlling the refill flow for carrying out moisturizing to the drum.Described control unit and the detection unit and regulating valve are logical
Letter connection, for according to the current aperture of the regulating valve, refill flow value, steam stream magnitude and water level value to the regulating valve
Aperture be adjusted so that the water level in the drum is within the scope of preset height.It can be according to regulating valve using above-mentioned apparatus
Current aperture, refill flow value, steam stream magnitude and water level value the aperture of regulating valve is controlled, to guarantee in drum
Water level maintains within the limits prescribed, and then guarantees that steam output is stablized.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of control device is applied to boiler plant, the boiler plant includes drum, which is characterized in that described device packet
Include the detection unit, control unit and regulating valve of communication connection；
The detection unit is arranged on pipeline, for detecting the refill flow value for obtaining the boiler plant, steam stream magnitude
And the water level value in the drum, and obtained the refill flow value, steam stream magnitude and water level value are sent to control list
Member；
The regulating valve is arranged between the small pump and the drum for supplying water for the drum, for controlling to the vapour
Packet carries out the refill flow of moisturizing；
Described control unit and the regulating valve communicate to connect, for according to the current aperture of the regulating valve, refill flow value,
Steam stream magnitude and water level value are adjusted the aperture of the regulating valve, so that the water level in the drum is in preset height model
In enclosing.
2. control device according to claim 1, which is characterized in that the detection unit includes water level detecting subelement,
The water level detecting subelement is used to detect the water position status in the drum, to obtain the water level value, and will be described
Water level value is sent to described control unit.
3. control device according to claim 2, which is characterized in that the detection unit further includes steam flowrate testing
Unit and refill flow detection sub-unit；
The steam outlet of the drum is arranged in the steam flowrate testing subelement, for detecting steam flow state, with
The steam stream magnitude is obtained, and the steam stream magnitude is sent to described control unit；
The refill flow detection sub-unit is arranged between the regulating valve and the drum, for detecting through the regulating valve
To the refill flow state of the drum moisturizing, to obtain the refill flow value, and the refill flow value is sent to institute
State control unit.
4. control device according to claim 3, which is characterized in that described control unit includes adjuster and controller；
The adjuster and the water level detecting subelement, refill flow detection sub-unit, are adjusted steam flowrate testing subelement
Valve and controller communication connection, for the current aperture according to the water level value, steam stream magnitude, refill flow value and regulating valve
Control instruction is generated, and the control instruction is sent to the controller；
The controller and the regulating valve communicate to connect, for controlling the aperture of the regulating valve according to the control instruction.
5. control device according to claim 4, which is characterized in that the adjuster includes master selector and secondary adjusting
Device；
The master selector and the water level detecting subelement and secondary controller communicate to connect, for being generated according to the water level value
First control instruction, and first control instruction is sent to the secondary controller；
The secondary controller and the master selector, steam flowrate testing subelement, refill flow detection sub-unit, regulating valve and
Controller communication connection, for according to the current aperture of the refill flow value, steam stream magnitude and regulating valve to described first
Control parameter relevant to the aperture of the regulating valve is adjusted in control instruction, to generate the second control instruction, and by institute
It states the second control instruction and is sent to the controller；
The controller, for being adjusted according to second control instruction to the aperture of the regulating valve.
6. control device according to claim 5, which is characterized in that described control unit further includes square root extractor；
The square root extractor and the steam flowrate testing subelement, refill flow detection sub-unit and secondary controller communicate to connect,
For handling the steam stream magnitude and refill flow value, and processing result is sent to the secondary controller；
The secondary controller, for the current aperture according to the processing result and the regulating valve to first control instruction
It is adjusted.
7. control device according to claim 5, which is characterized in that the detection unit further includes transmitter；
The transmitter and the water level detecting subelement and master selector communicate to connect, and are used for the water level detecting subelement
The water level value sent is sent to the master selector after being converted to electric signal.
8. control device according to claim 4, which is characterized in that the control device further includes alarm；
The alarm and the controller communicate to connect, the alarm for being generated according to the controller based on the water level value
Instruction is alarmed.
9. a kind of control method, which is characterized in that described applied to control device described in any one of claim 1-8
Method includes:
Obtain the water level value in refill flow value, steam stream magnitude and the drum of the boiler plant；
According to the current aperture of regulating valve and the refill flow value, steam stream magnitude and water level value to the aperture of the regulating valve
It is adjusted, so that the water level in drum is within the scope of preset height.
10. a kind of boiler system, which is characterized in that the boiler system includes any one in boiler plant and claim 1-8
Control device described in, the control device is for current aperture, the refill flow value, steam flow according to the regulating valve
Value and water level value are adjusted the aperture of the regulating valve, and the water level in the drum of the boiler plant is made to be in preset height
In range.
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