阅读说明：本技术 锅炉汽包液位三冲量控制方法、系统、设备及存储介质 (Boiler drum liquid level three-impulse control method, system, equipment and storage medium ) 是由 张晋 张磊 谢红辉 徐�明 于 2021-07-30 设计创作，主要内容包括：本发明提供了一种锅炉汽包液位三冲量控制方法、系统、设备及存储介质,该控制方法包括如下步骤：获取锅炉汽包液位E3、锅炉汽包的蒸汽质量流量E1以及锅炉汽包的给水流量E2；根据所述蒸汽质量流量E1和所述给水流量E2获得三冲量控制的修正参数E4；根据所述修正参数E4及监测到的所述锅炉汽包液位E3获得修正后的汽包液位E；根据修正后的汽包液位E获得给水调节阀的给水控制参数；根据所述控制参数控制所述给水调节阀的开度。本发明的锅炉汽包液位三冲量控制方法通过汽包的汽包液位、给水流量、蒸汽质量流量校正汽包的虚假液位,调节控制汽包给水流量,实现锅炉汽包液位的稳定、精确控制,提高冶金工业锅炉运行的稳定性和安全性。(The invention provides a boiler drum liquid level three-impulse control method, a system, equipment and a storage medium, wherein the control method comprises the following steps: acquiring a boiler drum liquid level E3, a boiler drum steam mass flow E1 and a boiler drum feedwater flow E2; obtaining a correction parameter E4 of three-impulse control according to the steam mass flow E1 and the feedwater flow E2; obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3; obtaining a water supply control parameter of the water supply regulating valve according to the corrected drum liquid level E; and controlling the opening of the water supply regulating valve according to the control parameters. The boiler drum liquid level three-impulse control method corrects the false liquid level of the drum through the drum liquid level, the feed water flow and the steam mass flow of the drum, adjusts and controls the drum feed water flow, realizes the stable and accurate control of the boiler drum liquid level, and improves the stability and the safety of the operation of the boiler in the metallurgical industry.)

1. A boiler drum liquid level three-impulse control method is characterized by comprising the following steps:

acquiring a boiler drum liquid level E3, a boiler drum steam mass flow E1 and a boiler drum feedwater flow E2;

obtaining a correction parameter E4 of the boiler drum liquid level according to the steam mass flow E1 and the feedwater flow E2;

obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3;

obtaining a water supply control parameter of the water supply regulating valve according to the corrected drum liquid level E;

and controlling the opening of the water supply regulating valve according to the control parameters.

2. The boiler drum level three-pulse control method according to claim 1, wherein the corrected drum level E is obtained by:

E＝E3+C*E4；

wherein: e4 is the correction parameter, and E4 ═ E1-E2, and C is the adjustment factor.

3. The boiler drum liquid level three-impulse control method according to claim 1, wherein the obtaining of the feedwater control parameter of the feedwater regulating valve according to the corrected drum liquid level E comprises the steps of:

acquiring a set value of the liquid level of the steam drum;

inputting the corrected set values of the steam drum liquid level E and the steam drum liquid level into a steam drum liquid level PI regulator module to obtain the feed water flow required by the boiler steam drum;

and calculating the corresponding water supply control parameters of the water supply regulating valve according to the required water supply flow.

4. The boiler drum liquid level three-pulse control method according to claim 1, wherein the step of obtaining the steam mass flow E1 comprises:

acquiring real-time steam temperature, real-time steam pressure and real-time steam flow of a boiler steam drum;

obtaining a real-time steam density according to the real-time steam temperature and the real-time steam pressure;

and obtaining steam mass flow E1 according to the real-time steam density and the real-time steam flow.

5. The boiler drum liquid level three-pulse control method according to claim 1, wherein the feed water regulating valve is a pneumatic regulating valve.

6. A boiler drum liquid level three-impulse control system for realizing the boiler drum liquid level three-impulse control method of any one of claims 1 to 5, which is characterized by comprising a monitoring module, a calculating module and a control module, wherein:

the monitoring module is used for acquiring the liquid level E3 of the boiler drum, the steam mass flow E1 of the boiler drum and the water supply flow E2 of the boiler drum;

the calculation module is used for obtaining a correction parameter E4 of the liquid level of the boiler drum according to the steam mass flow E1 and the feedwater flow E2;

the calculation module is further used for obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3; and

the water supply control parameter of the water supply regulating valve is obtained according to the corrected drum liquid level E;

the control module is used for controlling the opening of the water supply regulating valve according to the control parameters.

7. The boiler drum liquid level three-pulse control system according to claim 6, wherein the boiler drum liquid level three-pulse control system is adapted for a boiler drum device;

the boiler steam drum device comprises a boiler steam drum, a water feeding pipe and a steam pipe which are connected with the boiler steam drum, a water feeding regulating valve arranged on the water feeding pipe, a liquid level sensor arranged on the boiler steam, a steam flow sensor, a temperature sensor and a pressure sensor which are arranged on the steam pipe, and a flow sensor arranged on the water outlet side of the water feeding regulating valve;

the monitoring module respectively obtains the boiler drum liquid level E3 and the boiler drum water supply flow E2 by reading the liquid level value of the liquid level sensor and the water supply flow value of the flow sensor;

the monitoring module obtains the steam mass flow E1 of the boiler drum through reading the steam flow value of the steam flow sensor, the temperature value of the temperature sensor and the pressure value of the pressure sensor and calculating by the calculating module.

8. An electronic device, comprising:

a processor;

a memory having stored therein executable instructions of the processor;

wherein the processor is configured to perform the steps of the boiler drum level triple-pulse control method of any one of claims 1 to 5 via execution of the executable instructions.

9. A computer readable storage medium storing a program, wherein the program when executed by a processor implements the steps of the boiler drum level triple-pulse control method of any one of claims 1 to 5.

Technical Field

The invention relates to the field of boiler control, in particular to a method, a system, equipment and a storage medium for controlling three impulse quantities of boiler drum liquid level.

Background

The common accidents of the industrial boiler are many, such as water shortage in a boiler, overpressure of the boiler, water full in the boiler, steam and water co-evaporation, explosion of a furnace tube and the like, wherein the proportion of the water shortage accidents of the boiler is the highest. If the water level of the steam drum is too low, the natural circulation of steam and water of the boiler is damaged, so that water wall pipes are burnt out, and accidents such as pipe explosion and the like can occur in case of serious water shortage; the steam drum has over high water level, which directly affects the steam-water separation effect, increases the humidity of saturated steam and increases the salt content. Therefore, maintaining the water level of the steam drum within a certain range is an important means for ensuring the safe production and the normal operation of the industrial boiler.

The steam drum water level three-impulse control system is a control system which is composed of a steam drum water level as a main control signal, a steam flow as a feedforward control signal and a water supply flow as a feedback control signal. One of the main adjusting means in the past of the water level of the steam drum is to control the opening degree of a water supply adjusting valve and change the water supply quantity.

Patent CN112066360A discloses a control method, a storage medium and an electronic device for drum liquid level display, which calculate the drum liquid level output value by using the following formula:

OP＝IP1+((IP2-50)*FSBFW/100)-IP3

wherein OP is the output value of the liquid level of the steam drum; IP1 is the target drum steam flow; IP2 is the target drum level; FSBFW is the target feed water inlet flow; IP3 is the outlet water flow of the quencher; and controlling the display of the steam drum liquid level according to the steam drum liquid level output value.

The core of the patent is as follows: the steam pocket state information still includes at least one quencher inflow, predetermine the steam pocket liquid level and include that first preset steam pocket liquid level and second predetermine the steam pocket liquid level, first preset steam pocket liquid level is greater than the second predetermines the steam pocket liquid level.

Chinese patent CN109780528A discloses a triple-impulse control method for reducing boiler liquid level overshoot, which determines a steam-water mismatch amplification factor K according to a steam-water mismatch, and the formula is as follows:

k＝0.08-0.3*f(x)/(1-f(x)+f2(x))；

calculating a feed forward signal, the formula being:

the feedforward signal is steam-water mismatch amplification coefficient K multiplied by steam-water mismatch rate;

by adopting the control method, on the basis of three-impulse control, a variable feedforward control signal is added, and the problem of poor dynamic feedforward anti-interference capability is avoided through a variable steam-water mismatch amplification coefficient, so that frequent actions of a feed water regulating valve are avoided, the dynamic balance of the feed water quantity and the steam flow is kept, and the phenomenon of liquid level overshoot is reduced.

However, modern metallurgical industry boilers are developed towards large capacity and high parameter, generally speaking, the larger the boiler capacity is, the smaller the water capacity of the steam drum is, and the less the water storage capacity is allowed to fluctuate. If the water supply is interrupted, dangerous water levels may occur within a short time; if the amount of feed water alone is not compatible with the amount of steam, water starvation and water flood may occur within minutes. Also, the modern metallurgical industry boiler has higher requirements on drum water level control. The metallurgical industry boiler is not provided with a water inlet pipe of a quencher generally, so the patent CN112066360A is not suitable for the metallurgical industry boiler; because the steam quantity change of the metallurgical industry boiler is relatively stable, and accordingly, the steam-water distribution rate does not need to be continuously corrected, the patent CN109780528A is not suitable for the metallurgical industry boiler.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a boiler drum liquid level three-impulse control method, a system, equipment and a storage medium, wherein the control method corrects the false liquid level of a drum through the drum liquid level, the feed water flow and the steam mass flow, adjusts and controls the drum feed water flow, realizes the stable and accurate control of the boiler drum liquid level, and improves the stability and the safety of the operation of a metallurgical industry boiler.

The embodiment of the invention provides a boiler drum liquid level three-impulse control method, which comprises the following steps:

acquiring a boiler drum liquid level E3, a boiler drum steam mass flow E1 and a boiler drum feedwater flow E2;

obtaining a correction parameter E4 of the boiler drum liquid level according to the steam mass flow E1 and the feedwater flow E2;

obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3;

obtaining a water supply control parameter of the water supply regulating valve according to the corrected drum liquid level E;

and controlling the opening of the water supply regulating valve according to the control parameters.

According to some examples of the invention, the modified drum level E is obtained by:

E＝E3+C*E4；

wherein: e4 is the correction parameter, and E4 ═ E1-E2, and C is the adjustment factor.

According to some examples of the invention, obtaining the feedwater control parameter of the feedwater regulating valve from the corrected drum level E comprises the steps of:

acquiring a set value of the liquid level of the steam drum;

inputting the corrected set values of the steam drum liquid level E and the steam drum liquid level into a steam drum liquid level PI regulator module to obtain the feed water flow required by the boiler steam drum;

and calculating the corresponding water supply control parameters of the water supply regulating valve according to the required water supply flow.

According to some examples of this invention, obtaining the steam mass flow E1 step includes:

acquiring real-time steam temperature, real-time steam pressure and real-time steam flow of a boiler steam drum;

obtaining a real-time steam density according to the real-time steam temperature and the real-time steam pressure;

and obtaining steam mass flow E1 according to the real-time steam density and the real-time steam flow.

According to some examples of the invention, the feed water regulating valve is a pneumatic regulating valve.

The embodiment of the invention also provides a boiler drum liquid level three-impulse control system, which is used for realizing the boiler drum liquid level three-impulse control method and comprises a monitoring module, a calculation module and a control module, wherein:

the monitoring module is used for acquiring the liquid level E3 of the boiler drum, the steam mass flow E1 of the boiler drum and the water supply flow E2 of the boiler drum;

the calculation module is used for obtaining a correction parameter E4 of the liquid level of the boiler drum according to the steam mass flow E1 and the feedwater flow E2;

the calculation module is further used for obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3; and

the water supply control parameter of the water supply regulating valve is obtained according to the corrected drum liquid level E;

the control module is used for controlling the opening of the water supply regulating valve according to the control parameters.

According to some examples of the invention, the boiler drum liquid level three-pulse control system is adapted for use with a boiler drum unit;

the boiler steam drum device comprises a boiler steam drum, a water feeding pipe and a steam pipe which are connected with the boiler steam drum, a water feeding regulating valve arranged on the water feeding pipe, a liquid level sensor arranged on the boiler steam, a steam flow sensor, a temperature sensor and a pressure sensor which are arranged on the steam pipe, and a flow sensor arranged on the water outlet side of the water feeding regulating valve;

the monitoring module respectively obtains the boiler drum liquid level E3 and the boiler drum water supply flow E2 by reading the liquid level value of the liquid level sensor and the water supply flow value of the flow sensor;

the monitoring module obtains the steam mass flow E1 of the boiler drum through reading the steam flow value of the steam flow sensor, the temperature value of the temperature sensor and the pressure value of the pressure sensor and calculating by the calculating module.

An embodiment of the present invention further provides an electronic device, including:

a processor;

a memory having stored therein executable instructions of the processor;

wherein the processor is configured to perform the steps of the boiler drum level three-pulse control method via execution of the executable instructions.

Embodiments of the present invention also provide a computer readable storage medium storing a program, wherein the program when executed implements the steps of the boiler drum level three-pulse control method.

The boiler drum liquid level three-impulse control method corrects the false liquid level of the drum through the drum liquid level, the feed water flow and the steam mass flow of the drum, adjusts and controls the drum feed water flow, realizes the stable and accurate control of the boiler drum liquid level, and improves the stability and the safety of the operation of the boiler in the metallurgical industry.

Drawings

Other features, objects, and advantages of the invention will be apparent from the following detailed description of non-limiting embodiments, which proceeds with reference to the accompanying drawings and which is incorporated in and constitutes a part of this specification, illustrating embodiments consistent with the present application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a flow chart of a boiler drum liquid level three-pulse control method according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a boiler drum liquid level three-pulse control system according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a boiler drum assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the invention;

fig. 5 is a schematic structural diagram of a computer-readable storage medium according to an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

FIG. 1 is a flow chart of a boiler drum liquid level three-pulse control method according to an embodiment of the present invention; specifically, the boiler drum liquid level three-impulse control method comprises the following steps:

s100: acquiring a boiler drum liquid level E3, a boiler drum steam mass flow E1 and a boiler drum feedwater flow E2;

s200: obtaining a correction parameter E4 of three-impulse control according to the steam mass flow E1 and the feedwater flow E2;

s300: obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3;

s400: obtaining a water supply control parameter of the water supply regulating valve according to the corrected drum liquid level E;

s500: and controlling the opening of the water supply regulating valve according to the control parameters.

Generally, the boiler drum liquid level E3 is obtained by reading a liquid level sensor arranged on a boiler drum, but the above method greatly affects the accuracy of liquid level measurement due to the balance between liquid and steam in the drum, i.e. the false liquid level of the drum, and the false liquid level as a parameter for adjusting the liquid level in the drum cannot ensure that the drum water level is maintained in a range for ensuring the safe production and normal operation of the industrial boiler, thereby causing boiler accidents. The boiler drum liquid level three-impulse control method corrects the false liquid level of the drum through the drum liquid level, the feed water flow and the steam mass flow of the drum from the step S100 to the step S300, takes the false liquid level as the basis for adjusting and controlling the drum feed water flow, and controls the opening of the feed water regulating valve through the step S400 to the step S500, thereby controlling the feed water flow of the drum, realizing the stable and accurate control of the boiler drum liquid level and improving the stability and the safety of the operation of the metallurgical industrial boiler.

The invention also provides a boiler drum liquid level three-impulse control system for realizing the boiler drum liquid level three-impulse control method, and FIG. 2 is a schematic structural diagram of the boiler drum liquid level three-impulse control system according to an embodiment of the invention; the boiler drum liquid level three-impulse control system specifically comprises a monitoring module M100, a calculating module M200 and a control module M300, wherein:

the monitoring module M100 is used for acquiring a boiler drum liquid level E3, a steam mass flow E1 of a boiler drum and a feedwater flow E2 of the boiler drum;

the calculation module M200 is used for obtaining a correction parameter E4 of three-impulse control according to the steam mass flow E1 and the feedwater flow E2;

the calculation module M200 is further configured to obtain a corrected drum liquid level E according to the correction parameter and the monitored boiler drum liquid level E3; and

the water supply control parameter of the water supply regulating valve is obtained according to the corrected drum liquid level E;

the control module M300 is used for controlling the opening of the water supply regulating valve according to the control parameters.

The function implementation manner of each function module in the boiler drum liquid level three-impulse control system of the embodiment can be implemented by adopting the specific implementation manner of each step in the boiler drum liquid level three-impulse control method. For example, the monitoring module M100, the calculating module M200 and the control module M300 may respectively adopt the specific implementation manners of the steps S100 to S500 to implement the functions thereof, which are not described herein again.

The boiler drum liquid level three-impulse control system is suitable for a boiler drum device; FIG. 3 is a schematic structural view of a boiler drum assembly according to an embodiment of the present invention;

the boiler steam drum device comprises a boiler steam drum, a water feeding pipe and a steam pipe which are connected with the boiler steam drum, and a steam drum liquid level PI regulator module LICA 03; a feed water regulating valve LV03 arranged on the feed water pipe and connected with the steam drum liquid level PI regulator module, a liquid level sensor LI03 arranged on the boiler steam, a steam flow sensor FIQ01, a temperature sensor and a pressure sensor (not shown in the figure) arranged on the steam pipe, and a flow sensor FIQ02 arranged on the water outlet side of the feed water regulating valve.

The level sensor LI03 may be a dual chamber balanced level gauge, a capacitive level gauge, or a radar level gauge, etc. The feed water regulating valve LV03 is a pneumatic regulating valve.

The monitoring module M100 respectively obtains the boiler drum liquid level E3 and the boiler drum water supply flow E2 by reading the liquid level value of the liquid level sensor and the water supply flow value of the flow sensor;

the monitoring module M100 obtains the steam mass flow E1 of the boiler drum by reading the steam flow value of the steam flow sensor, the temperature value of the temperature sensor and the pressure value of the pressure sensor and calculating through the calculating module M200.

The boiler drum liquid level three-impulse control system and the control method are used in boiler systems such as a copper synthesis furnace waste heat boiler, an oxygen-enriched top-blown smelting waste heat boiler, a bottom-blown furnace waste heat boiler and the like, namely, the boiler drum liquid level is used as a main control signal, the steam flow is used as a feedforward control signal, and the water supply flow is used as a feedback control signal. The stable and accurate control of the liquid level of the boiler drum is realized, and the stability, the high efficiency and the safety of the operation of the boiler in the metallurgical industry are improved.

Further, in some embodiments, the step of obtaining the steam mass flow rate E1 in step S100 includes:

acquiring real-time steam temperature, real-time steam pressure and real-time steam flow of a boiler steam drum; the real-time steam temperature, the real-time steam pressure and the real-time steam flow are respectively obtained by reading a temperature sensor, a pressure sensor and a steam flow sensor FIQ01 which are arranged on a steam pipe;

obtaining a real-time steam density according to the real-time steam temperature and the real-time steam pressure;

and obtaining a steam mass flow rate E1 according to the real-time steam density and the real-time steam flow rate, namely obtaining the steam mass flow rate E1 as the steam flow rate obtained through pressure compensation calculation.

Taking the embodiment of fig. 3 as an example, further, the corrected drum level E is obtained by:

E＝E3+C*E4；

wherein: e4 is the correction parameter, and E4 is E1-E2, i.e. in this embodiment, the correction parameter E4 is the difference between the feed water flow E1 and the steam mass flow E2, and C is the adjustment factor. Fig. 3 shows that the adjustment factor C is 0.3, and this value is merely an example, and the value of C may be selected as needed.

According to some examples of the invention, obtaining the feedwater control parameter of the feedwater regulating valve from the corrected drum level E comprises the steps of:

acquiring a set value of the liquid level of the steam drum;

the X end of the diagram in FIG. 3 is the value of the measurement input end of the drum liquid level PI regulator module, the setting input end of the W-end drum liquid level PI regulator module, and the corrected drum liquid level E and the drum liquid level setting value are respectively input into the X end and the W end of the drum liquid level PI regulator module to obtain the feed water flow rate required by the boiler drum;

and calculating the corresponding water supply control parameters of the water supply regulating valve according to the required water supply flow. Taking the feed-water regulating valve LV03 as an example of a pneumatic regulating valve, the control parameter is given as a parameter related to controlling the opening degree of the pneumatic regulating valve.

An electronic device 600 according to this embodiment of the invention is described below with reference to fig. 4. The electronic device 600 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.

As shown in fig. 4, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one memory unit 620, a bus 630 connecting the different platform components (including the memory unit 620 and the processing unit 610), a display unit 640, etc.

Wherein the storage unit stores program code which can be executed by the processing unit 610 such that the processing unit 610 performs the steps according to various exemplary embodiments of the present invention as described in the above-mentioned method section of the present specification. For example, processing unit 610 may perform the steps as shown in fig. 1.

The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.

The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.

Bus 630 may be one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.

The embodiment of the invention also provides a computer readable storage medium for storing a program, and the program is executed to realize the steps of the boiler drum liquid level three-impulse control method. In some possible embodiments, the various aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to the various exemplary embodiments of the invention described in the method part above of this description when said program product is run on the terminal device.

Referring to fig. 5, a program product 800 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).

In summary, the present invention provides a method, a system, a device and a storage medium for controlling three impulse of boiler drum liquid level, wherein the control method comprises the following steps: acquiring a boiler drum liquid level E3, a boiler drum steam mass flow E1 and a boiler drum feedwater flow E2; obtaining a correction parameter of three-impulse control according to the steam mass flow E1 and the feedwater flow E2; obtaining a corrected drum liquid level E according to the correction parameter E4 and the monitored boiler drum liquid level E3; obtaining a water supply control parameter of the water supply regulating valve according to the corrected drum liquid level E; and controlling the opening of the water supply regulating valve according to the control parameters. The boiler drum liquid level three-impulse control method corrects the false liquid level of the drum through the drum liquid level, the feed water flow and the steam mass flow of the drum, adjusts and controls the drum feed water flow, realizes the stable and accurate control of the boiler drum liquid level, and improves the stability, the efficiency and the safety of the operation of the boiler in the metallurgical industry.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.