A raw water heating system for a boiler feed water system, an intelligent control method and a system

Abstract

The present invention discloses a raw water heating system of a boiler feed water system, an intelligent control method and a system, comprising a steam pipe, a steam-water mixing heater, a heater water inlet pipe, a steam-water mixing heater and a filter; the steam pipe is connected to the steam inlet of the steam-water mixing heater, the heater water inlet pipe is connected to the water inlet of the steam-water mixing heater, the water outlet of the steam-water mixing heater is connected to the water inlet pipe of the filter, a steam flow meter, a steam pressure transmitter, a steam temperature transmitter, a steam inlet pneumatic valve, a steam regulating valve and a steam exhaust valve are installed on the steam pipe, a raw water flow meter, a raw water pressure transmitter, a raw water temperature transmitter and a water inlet pneumatic valve are installed on the heater water inlet pipe, and the system, the intelligent control method and the system effectively control the steam quantity and temperature of the raw water heating system.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment, and relates to a raw water heating system of a boiler feed water system, and an intelligent control method and system. Background Art

[0002] At present, most boiler feed water treatment systems use the "ultrafiltration + reverse osmosis + electric desalination" membrane process for desalination. Whether it is reservoir water, seawater, urban water, wastewater, etc., the water temperature fluctuates greatly due to the influence of seasons. Water temperature is the main factor affecting pretreatment coagulation and clarification, membrane system water output, membrane pollution, etc. The operating temperature of the membrane system is greatly affected by the season. Water temperature fluctuations lead to increased system operating pressure, decreased water output, and shortened membrane service life. It is very important to stabilize the inlet temperature of the membrane system. The "Design Specification for Softening and Desalination of Industrial Water" (GB / T 50109) stipulates that the optimal design water temperature of membrane equipment such as reverse osmosis and electric desalination should be controlled at 20℃-25℃. If it is lower than the lower limit of the suitable temperature range, the system output will be insufficient, endangering the safe and stable operation of the unit and heating.

[0003] In order to meet the requirements of the desalted water preparation system, a raw water heater is required. Common ways to heat raw water in the boiler feed water system include hot water heating, electric heating, steam heating, etc. Hot water heating is easy to install and inspect, but it is easy to scale, has low thermal efficiency utilization, a narrow temperature control range, and high cost. Electric heating converts electrical energy into thermal energy, and then transfers the thermal energy to the pipes and equipment that need to be heated. It works stably and has high reliability, but the operating electricity cost is high, maintenance is not convenient, and there are safety hazards. Steam heating is easy to operate and has a wide range, but in actual operation, as the inlet flow and temperature change, the steam volume and temperature fluctuate greatly, affecting the safe and stable operation of the boiler feed water treatment system.

[0004] Therefore, it is necessary to set up a raw water heating system for the boiler feed water system with intelligent temperature control to effectively control the steam volume and temperature of the raw water heating system. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a raw water heating system, an intelligent control method and a system for a boiler feed water system, which effectively control the steam volume and temperature of the raw water heating system.

[0006] To achieve the above object, the present invention discloses a raw water heating system for a boiler feed water system, comprising a steam pipe, a steam-water mixing heater, a heater water inlet pipe, a steam-water mixing heater and a filter;

[0007] The steam pipe is connected to the steam inlet of the steam-water mixing heater, the heater water inlet pipe is connected to the water inlet of the steam-water mixing heater, the water outlet of the steam-water mixing heater is connected to the water inlet pipe of the filter, a steam flow meter, a steam pressure transmitter, a steam temperature transmitter, a steam inlet pneumatic valve, a steam regulating valve and a steam exhaust valve are installed on the steam pipe, and a raw water flow meter, a raw water pressure transmitter, a raw water temperature transmitter and a water inlet pneumatic valve are installed on the heater water inlet pipe.

[0008] Furthermore, a filter water inlet flow meter, a filter pressure transmitter and a filter temperature transmitter are installed on the water outlet pipe of the steam-water mixing heater.

[0009] Furthermore, it also includes an intelligent control system, which is connected to a steam flow meter, a steam pressure transmitter, a steam temperature transmitter, a steam inlet pneumatic valve, a steam regulating valve, a raw water flow meter, a raw water pressure transmitter, a raw water temperature transmitter, a water inlet pneumatic valve, a filter water inlet pressure transmitter, a filter water inlet temperature transmitter and a steam exhaust valve.

[0010] The present invention discloses an intelligent control method for a raw water heating system of a boiler feed water system, comprising:

[0011] According to the online calculation mathematical model, determine the steam flow Q m ;

[0012] According to the steam flow Q m , according to the steam flow and steam control valve opening curve, the opening F of the steam control valve is calculated by using the median interpolation method;

[0013] The steam regulating valve is controlled according to the opening F of the steam regulating valve.

[0014] Furthermore, the expression of the online calculation mathematical model is:

[0015]

[0016] Among them, Q w is the raw water volume monitored online, t 1 is the raw water temperature monitored online, t m is the steam temperature monitored online, t 2 is the heater outlet water temperature monitored online, h m , m and C w The steam temperature is t m The corresponding enthalpy value, steam density and specific heat of water at constant pressure.

[0017] Furthermore, it also includes:

[0018] During the debugging stage of the heating system, the steam flow rate at different steam regulating valve openings is measured with a steam regulating valve opening of 5% as the interval, and the steam flow rate and steam regulating valve opening curve is drawn based on this.

[0019] Furthermore, a filter water inlet flow meter, a filter pressure transmitter and a filter temperature transmitter are installed on the water outlet pipe of the steam-water mixing heater.

[0020] The invention discloses an intelligent control system, comprising:

[0021] Determination module, used to determine the steam flow Q according to the online calculation mathematical model m ;

[0022] Calculation module for calculating the steam flow Q m , according to the steam flow and steam control valve opening curve, the opening F of the steam control valve is calculated by using the median interpolation method;

[0023] The control module is used to control the steam regulating valve according to the opening F of the steam regulating valve.

[0024] Furthermore, the expression of the online calculation mathematical model is:

[0025]

[0026] Among them, Q w is the raw water volume monitored online, t 1 is the raw water temperature monitored online, t m is the steam temperature monitored online, t 2 is the heater outlet water temperature monitored online, h m , m and C w The steam temperature is t m The corresponding enthalpy value, steam density and specific heat of water at constant pressure.

[0027] Furthermore, it also includes:

[0028] The drawing module is used to measure the steam flow rate under different steam regulating valve openings with a steam regulating valve opening of 5% as an interval during the debugging stage of the heating system, and to draw a steam flow rate and steam regulating valve opening curve based on this.

[0029] The present invention has the following beneficial effects:

[0030] The raw water heating system, intelligent control method and system of the boiler feed water system described in the present invention determine the steam flow rate according to the online calculation mathematical model during specific operation, and based on the steam flow rate, determine the opening of the steam regulating valve according to the steam flow rate and the steam regulating valve opening curve, so as to realize the real-time feedback adjustment of the steam regulating valve opening and the intelligent and precise automatic temperature control of the heating system, improve the control effect of the steam flow rate and the outlet water temperature of the heating system, make the temperature of the boiler feed water treatment system more stable, and greatly reduce the influence of temperature changes on the performance of subsequent membrane treatment equipment such as ultrafiltration, reverse osmosis, and electric desalination. At the same time, it effectively avoids the situation of excessive temperature control, reduces the waste of high-quality steam, and improves the overall energy-saving effect of the system, which is in line with the environmental protection concept of green energy saving and the intelligent development of water management. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 is a flow chart of the method of the present invention;

[0034] Figure 3 It is a system structure diagram of the present invention.

[0035] Among them, 1 is a steam pipe, 2 is a steam flow meter, 3 is a steam pressure transmitter, 4 is a steam temperature transmitter, 5 is a steam inlet pneumatic valve, 6 is a steam regulating valve, 7 is a steam-water mixing heater, 8 is a heater water inlet pipe, 9 is a raw water flow meter, 10 is a raw water pressure transmitter, 11 is a raw water temperature transmitter, 12 is a water inlet pneumatic valve, 13 is a filter water inlet pressure transmitter, 14 is a filter water inlet temperature transmitter, 15 is a filter, 16 is a steam exhaust valve, 17 is a heater drain outlet, and 18 is an intelligent control system. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0038] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0039] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0040] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0041] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0044] Embodiment 1

[0045] refer to Figure 1 The raw water heating system of the boiler feed water system with intelligent temperature control of the present invention comprises a steam pipe 1, a steam flow meter 2, a steam pressure transmitter 3, a steam temperature transmitter 4, a steam inlet pneumatic valve 5, a steam regulating valve 6, a steam-water mixing heater 7, a heater inlet pipe 8, a raw water flow meter 9, a raw water pressure transmitter 10, a raw water temperature transmitter 11, a water inlet pneumatic valve 12, a filter inlet water pressure transmitter 13, a filter inlet water temperature transmitter 14, a filter 15, a steam exhaust valve 16, a heater drain port 17 and an intelligent control system 18;

[0046] The steam-water mixing heater 7 is provided with a steam inlet, a water inlet, a water outlet and a sewage outlet. The steam pipe 1 is connected to the steam inlet of the steam-water mixing heater 7, the heater water inlet pipe 8 is connected to the water inlet of the steam-water mixing heater 7, the water outlet of the steam-water mixing heater 7 is connected to the water inlet pipe of the filter 15, and the heater sewage outlet 17 is arranged at the bottom of the shell of the steam-water mixing heater 7, and is used to discharge impurities and sewage in the steam-water mixing heater 7 when starting and stopping.

[0047] A steam flow meter 2, a steam pressure transmitter 3 and a steam temperature transmitter 4 are installed on the steam pipe 1 for online monitoring of steam flow, pressure and temperature; a steam inlet pneumatic valve 5, a steam regulating valve 6 and a steam exhaust valve 16 are also provided on the steam pipe 1, which are respectively used to control the start and stop of steam inlet, the amount of steam inlet and the discharge of water accumulated in the pipeline; the steam flow meter 2, the steam pressure transmitter 3, the steam temperature transmitter 4, the steam inlet pneumatic valve 5, the steam regulating valve 6 and the steam exhaust valve 16 are connected to the intelligent control system 18.

[0048] The heater water inlet pipe 8 is installed with a raw water flow meter 9, a raw water pressure transmitter 10 and a raw water temperature transmitter 11 for online monitoring of the raw water flow, pressure and temperature; the heater water inlet pipe 8 is also provided with a water inlet pneumatic valve 12 for controlling the start and stop of water inlet; the raw water flow meter 9, the raw water pressure transmitter 10, the raw water temperature transmitter 11 and the water inlet pneumatic valve 12 are connected to the intelligent control system 18.

[0049] A filter water inlet flowmeter 13, a filter pressure transmitter 14 and a filter temperature transmitter 15 are installed on the water outlet pipe of the steam-water mixing heater 7 for online monitoring of the filter water inlet flow, pressure and temperature.

[0050] Embodiment 2

[0051] refer to Figure 2 The intelligent control method for heating raw water in a boiler feed water system with intelligent temperature control of the present invention comprises the following steps:

[0052] 1) Online signal data collection mainly collects online instrument, valve and other related signal data through the intelligent control system 18, wherein the online instrument signals include the pressure data, flow data and temperature data of raw water, steam and filter 15 inlet water, and the valve signals include the signal data of steam inlet pneumatic valve 5, steam regulating valve 6, steam exhaust valve 16 and water inlet pneumatic valve 12;

[0053] 2) During the debugging stage of the heating system, the steam flow rate at different steam regulating valve 6 openings is measured with the steam regulating valve 6 opening of 5% as the interval, and a steam flow rate and steam regulating valve 6 opening curve is drawn and stored in the intelligent control system 18;

[0054] 3) According to the raw water volume Q monitored online w , Raw water temperature t 1 , steam temperature t m , Heater outlet water temperature t 2 , and the steam temperature t m The corresponding enthalpy value h m , steam density ρ m , water specific heat at constant pressure C w , calculated by steam flow meter 2 formula Construct an online calculation mathematical model to determine the steam flow rate;

[0055] 4) Determine the steam flow rate Q based on the online calculation mathematical model m According to the steam flow rate and the opening curve of the steam control valve 6, according to the opening data of the steam control valve 6 under adjacent steam flow rates, the opening F of the steam control valve 6 is calculated online by the median interpolation method;

[0056] 5) The intelligent control system 18 controls the steam regulating valve 6 according to the opening degree F of the steam regulating valve 6 .

[0057] Embodiment 3

[0058] refer to Figure 3 The present invention discloses an intelligent control system, comprising:

[0059] A drawing module is used to measure the steam flow rate under different steam control valve 6 openings with 5% steam control valve 6 opening as an interval during the heating system debugging stage, and to draw a steam flow rate and steam control valve 6 opening curve based on this;

[0060] Determination module, used to determine the steam flow Q according to the online calculation mathematical model m ;

[0061] Calculation module for calculating the steam flow Q m , according to the steam flow and the opening curve of the steam control valve 6, the opening F of the steam control valve 6 is calculated by using the median interpolation method;

[0062] The control module is used to control the steam regulating valve 6 according to the opening degree F of the steam regulating valve 6.

[0063] Furthermore, the expression of the online calculation mathematical model is:

[0064]

[0065] Among them, Q w is the raw water volume monitored online, t 1 is the raw water temperature monitored online, t m is the steam temperature monitored online, t 2 is the heater outlet water temperature monitored online, h m , m and C w The steam temperature is t m The corresponding enthalpy value, steam density and specific heat of water at constant pressure.

[0066] The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0067] Embodiment 4

[0068] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the intelligent control method when executing the computer program, for example, including: determining the steam flow rate Q according to an online calculation mathematical model; m ; According to the steam flow Q m , according to the steam flow and the opening curve of the steam regulating valve 6, the opening F of the steam regulating valve 6 is calculated by the median interpolation method; the steam regulating valve 6 is controlled according to the opening F of the steam regulating valve 6. Wherein, the memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc.; the processor, the network interface, and the memory are interconnected through an internal bus, and the internal bus can be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0069] Embodiment 5

[0070] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of implementing the intelligent control method include: determining the steam flow rate Q according to an online calculation mathematical model; m ; According to the steam flow Q m , according to the steam flow and the opening curve of the steam regulating valve 6, the opening F of the steam regulating valve 6 is calculated by the median interpolation method; the steam regulating valve 6 is controlled according to the opening F of the steam regulating valve 6. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.

[0071] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0072] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0073] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0075] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention is indicated by the following claims.

[0076] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0077] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A raw water heating system for a boiler feed water system, characterized in that: It comprises a steam pipe (1), a steam-water mixing heater (7), a heater water inlet pipe (8), a steam-water mixing heater (7) and a filter (15); The steam pipe (1) is connected to the steam inlet of the steam-water mixing heater (7), the heater water inlet pipe (8) is connected to the water inlet of the steam-water mixing heater (7), and the water outlet of the steam-water mixing heater (7) is connected to the water inlet pipe of the filter (15). The steam pipe (1) is equipped with a steam flow meter (2), a steam pressure transmitter (3), a steam temperature transmitter (4), a steam inlet pneumatic valve (5), a steam regulating valve (6) and a steam exhaust valve (16), and the heater water inlet pipe (8) is equipped with a raw water flow meter (9), a raw water pressure transmitter (10), a raw water temperature transmitter (11) and a water inlet pneumatic valve (12).

2. The raw water heating system for boiler feed water system according to claim 1, characterized in that: A filter water inlet flow meter (13), a filter pressure transmitter (14) and a filter temperature transmitter (15) are installed on the water outlet pipe of the steam-water mixing heater (7).

3. The raw water heating system for boiler feed water system according to claim 2, characterized in that: The invention also comprises an intelligent control system (18), wherein the intelligent control system (18) is connected to a steam flow meter (2), a steam pressure transmitter (3), a steam temperature transmitter (4), a steam inlet pneumatic valve (5), a steam regulating valve (6), a raw water flow meter (9), a raw water pressure transmitter (10), a raw water temperature transmitter (11), a water inlet pneumatic valve (12), a filter water inlet pressure transmitter (13), a filter water inlet temperature transmitter (14) and a steam exhaust valve (16).

4. An intelligent control method for the raw water heating system of the boiler feed water system according to claim 1, characterized in that: include: According to the online calculation mathematical model, determine the steam flow Q m ; According to the steam flow Q m , according to the steam flow rate and the opening curve of the steam control valve (6), the opening F of the steam control valve (6) is calculated by using the median interpolation method; The steam regulating valve (6) is controlled according to the opening degree F of the steam regulating valve (6).

5. The intelligent control method for the raw water heating system of the boiler feed water system according to claim 4 is characterized in that: The expression of the online calculation mathematical model is: Among them, Q w is the raw water volume monitored online, t1 is the raw water temperature monitored online, t m is the online monitored steam temperature, t2 is the online monitored heater outlet water temperature, h m , m and C w The steam temperature is t m The corresponding enthalpy value, steam density and specific heat of water at constant pressure.

6. The intelligent control method for the raw water heating system of the boiler feed water system according to claim 4 is characterized in that: Also includes: During the commissioning phase of the heating system, the steam flow rate at different steam regulating valve (6) openings is measured with a steam regulating valve (6) opening of 5% as an interval, and a steam flow rate and steam regulating valve (6) opening curve is drawn based on the measurement.

7. The intelligent control method for the raw water heating system of the boiler feed water system according to claim 4 is characterized in that: A filter water inlet flow meter (13), a filter pressure transmitter (14) and a filter temperature transmitter (15) are installed on the water outlet pipe of the steam-water mixing heater (7).

8. An intelligent control system, characterized in that: include: Determination module, used to determine the steam flow Q according to the online calculation mathematical model m ; Calculation module for calculating the steam flow Q m , according to the steam flow rate and the opening curve of the steam control valve (6), the opening F of the steam control valve (6) is calculated by using the median interpolation method; The control module is used to control the steam regulating valve (6) according to the opening degree F of the steam regulating valve (6).

9. The intelligent control system according to claim 8, characterized in that: The expression of the online calculation mathematical model is: Among them, Q w is the raw water volume monitored online, t1 is the raw water temperature monitored online, t m is the online monitored steam temperature, t2 is the online monitored heater outlet water temperature, h m , m and C w The steam temperature is t m The corresponding enthalpy value, steam density and specific heat of water at constant pressure.

10. The intelligent control system according to claim 4, characterized in that: Also includes: The drawing module is used to measure the steam flow rate at different steam control valve (6) openings at a 5% steam control valve (6) opening interval during the heating system debugging phase, and to draw a steam flow rate and steam control valve (6) opening curve based on the measurement.

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