Automatic regulation output control method and system for boiler make-up water treatment system of thermal power plant

Abstract

The invention discloses an automatic output regulation control method and system for a boiler make-up water treatment system of a thermal power plant. The automatic output regulation control method comprises the following steps: controlling an ultrafiltration water feed pump according to ultrafiltration water production flow and primary reverse osmosis water inlet flow; a first-stage reverse osmosis high-pressure pump is controlled according to the first-stage reverse osmosis water production flow and the second-stage reverse osmosis water inlet flow; controlling a second-stage reverse osmosis high-pressure pump according to the second-stage reverse osmosis water production flow and the EDI water inlet flow; an ultrafiltration water feeding pump and a first-stage reverse osmosis high-pressure pump are controlled according to the liquid level of the ultrafiltration water producing tank; the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump are controlled according to the liquid level of the first-stage reverse osmosis water production tank; and the second-stage reverse osmosis high-pressure pump and the EDI water feeding pump are controlled according to the liquid level of the second-stage reverse osmosis water production tank, and the method can automatically output power of the pumps.

Description

Technical Field

[0001] The present invention belongs to the field of automatic control of boiler make-up water in thermal power plants, and relates to an automatic regulation output control method and system for a boiler make-up water treatment system in a thermal power plant. Background Art

[0002] The boiler make-up water treatment system is an important part of a thermal power plant. Its function is to purify raw water through a series of purification processes to produce make-up water that meets the requirements of the water vapor system cycle.

[0003] This system usually includes multiple technological processes, such as filtration, reverse osmosis, ion exchange, etc., to remove impurities, hardness ions, dissolved solids, etc. in the raw water, and ensure the safe and stable operation of the boiler. Its technological process is generally as follows: The raw water first undergoes pretreatment, and the pretreatment link may include multi-media filters, ultrafiltration, activated carbon filters, etc., which are used to remove suspended solids, colloids, organic matter and other pollutants in the water to prevent them from fouling and damaging subsequent treatment equipment. The water after pretreatment may enter the reverse osmosis device, and reverse osmosis can remove most of the inorganic salt ions. Finally, the water will undergo ion exchange treatment to further remove the salts in the water so that the product water meets the requirements of boiler water use.

[0004] Currently, most of the control of the boiler make-up water treatment system adopts DCS control, which can realize the sequential control start and stop of single-stage subsystem equipment and the basic interlock protection of the equipment. However, it still relies on manual operation by the operating personnel. The operating personnel need to always pay attention to the operation of the boiler make-up water treatment system equipment and adjust the equipment output by manually increasing or decreasing the pump frequency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provide an automatic regulation output control method and system for a boiler make-up water treatment system in a thermal power plant, which can automatically regulate the output of relevant centrifugal pumps.

[0006] To achieve the above purpose, the present invention discloses an automatic regulation output control method for a boiler make-up water treatment system in a thermal power plant, including:

[0007] Controlling the ultrafiltration feed pump according to the ultrafiltration product water flow rate and the first-stage reverse osmosis inlet water flow rate;

[0008] Controlling the first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis inlet water flow rate;

[0009] Controlling the second-stage reverse osmosis high-pressure pump according to the second-stage reverse osmosis product water flow rate and the EDI inlet water flow rate;

[0010] Controlling the ultrafiltration feed pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration product water tank;

[0011] Control the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump according to the liquid level of the first-stage reverse osmosis product water tank;

[0012] Control the second-stage reverse osmosis high-pressure pump and the EDI feed water pump according to the liquid level of the second-stage reverse osmosis product water tank.

[0013] Furthermore, compare the difference between the ultrafiltration product water flow rate and the first-stage reverse osmosis influent water flow rate with the preset range interval 1. When the difference between the ultrafiltration product water flow rate and the first-stage reverse osmosis influent water flow rate is not within the preset range interval 1, issue a frequency increase or decrease command to the ultrafiltration feed water pump.

[0014] Furthermore, compare the difference between the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis influent water flow rate with the preset range interval 2. When the difference between the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis influent water flow rate is not within the preset range interval 2, issue a frequency increase or decrease command to the first-stage reverse osmosis high-pressure pump.

[0015] Furthermore, compare the difference between the second-stage reverse osmosis product water flow rate and the EDI influent water flow rate with the preset range interval 3. When the difference between the second-stage reverse osmosis product water flow rate and the EDI influent water flow rate is not within the preset range interval 3, issue a frequency increase or decrease command to the second-stage reverse osmosis high-pressure pump.

[0016] Furthermore, compare the liquid level of the ultrafiltration product water tank with the preset range interval 4. When the liquid level of the ultrafiltration product water tank is not within the preset range interval 4, issue a frequency increase or decrease command to the ultrafiltration feed water pump and the first-stage reverse osmosis high-pressure pump.

[0017] Furthermore, compare the liquid level of the first-stage reverse osmosis product water tank with the preset range interval 5. When the liquid level of the first-stage reverse osmosis product water tank is not within the preset range interval 5, issue a frequency increase or decrease command to the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump.

[0018] Furthermore, compare the liquid level of the second-stage reverse osmosis product water tank with the preset range interval 6. When the liquid level of the second-stage reverse osmosis product water tank is not within the preset range interval 6, issue a frequency increase or decrease command to the second-stage reverse osmosis high-pressure pump and the EDI feed water pump.

[0019] The present invention discloses an automatic regulating output control system for a boiler make-up water treatment system in a thermal power plant, including:

[0020] A first control module for controlling the ultrafiltration feed water pump according to the ultrafiltration product water flow rate and the first-stage reverse osmosis influent water flow rate;

[0021] A second control module for controlling the first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis influent water flow rate;

[0022] A third control module for controlling the second-stage reverse osmosis high-pressure pump according to the second-stage reverse osmosis product water flow rate and the EDI influent water flow rate;

[0023] The fourth control module is used to control the ultrafiltration feed water pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration water production tank;

[0024] The fifth control module is used to control the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump according to the liquid level of the first-stage reverse osmosis water production tank;

[0025] The sixth control module is used to control the second-stage reverse osmosis high-pressure pump and the EDI feed water pump according to the liquid level of the second-stage reverse osmosis water production tank.

[0026] The present invention discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the automatic regulation output control method for the make-up water treatment system of the thermal power plant boiler are realized.

[0027] The present invention discloses a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the automatic regulation output control method for the make-up water treatment system of the thermal power plant boiler are realized.

[0028] The present invention has the following beneficial effects:

[0029] When the automatic regulation output control method and system for the make-up water treatment system of the thermal power plant boiler according to the present invention are specifically operated, an automatic control method is adopted to automatically control the ultrafiltration feed water pump, the first-stage reverse osmosis high-pressure pump, the second-stage reverse osmosis high-pressure pump, and the EDI feed water pump according to the detected parameters, realizing the automatic operation and monitoring of the system, making the water production process simple and efficient, reducing the complicated labor burden of the operation personnel, and accurately controlling the operation output of the equipment in real time, which has a positive effect on ensuring the stable operation of the make-up water system. Description of the Drawings

[0030] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 is the method flow chart of the present invention;

[0032] Figure 2 is the schematic diagram of the internal signal processing of the instruction in the present invention. Detailed Embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying 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 them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the presence of the 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 their combinations.

[0035] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0036] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the contextually related objects.

[0037] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range can also be referred to as the second preset range, and similarly, the second preset range can also be referred to as the first preset range.

[0038] Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0039] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components described and shown in the accompanying drawings here can 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0040] Schematic diagrams of various structures according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0041] Embodiment 1

[0042] It should be noted that the process flow of the boiler make-up water treatment system is divided into ultrafiltration → ultrafiltration product water tank → primary reverse osmosis → primary reverse osmosis product water tank → secondary reverse osmosis → secondary reverse osmosis product water tank → EDI (continuous electrodeionization module) → demineralized water tank according to the flow direction of the medium.

[0043] Reference Figure 1 and Figure 2 , the automatic regulation of output power control method for the boiler make-up water treatment system of the thermal power plant described in the present invention includes the following steps:

[0044] Compare the difference between the ultrafiltration product water flow rate and the primary reverse osmosis inlet water flow rate with the preset range interval 1. When the difference between the ultrafiltration product water flow rate and the primary reverse osmosis inlet water flow rate is not within the preset range interval 1, a frequency increase or decrease command is issued to the ultrafiltration feed pump.

[0045] Compare the difference between the primary reverse osmosis product water flow rate and the secondary reverse osmosis inlet water flow rate with the preset range interval 2. When the difference between the primary reverse osmosis product water flow rate and the secondary reverse osmosis inlet water flow rate is not within the preset range interval 2, a frequency increase or decrease command is issued to the primary reverse osmosis high-pressure pump.

[0046] Compare the difference between the secondary reverse osmosis product water flow rate and the EDI inlet water flow rate with the preset range interval 3. When the difference between the secondary reverse osmosis product water flow rate and the EDI inlet water flow rate is not within the preset range interval 3, issue a frequency increase or decrease command to the secondary reverse osmosis high-pressure pump.

[0047] Compare the liquid level of the ultrafiltration product water tank with the preset range interval 4. When the liquid level of the ultrafiltration product water tank is not within the preset range interval 4, issue a frequency increase or decrease command to the ultrafiltration feed pump and the primary reverse osmosis high-pressure pump.

[0048] Compare the liquid level of the primary reverse osmosis product water tank with the preset range interval 5. When the liquid level of the primary reverse osmosis product water tank is not within the preset range interval 5, issue a frequency increase or decrease command to the primary reverse osmosis high-pressure pump and the secondary reverse osmosis high-pressure pump.

[0049] Compare the liquid level of the secondary reverse osmosis product water tank with the preset range interval 6. When the liquid level of the secondary reverse osmosis product water tank is not within the preset range interval 6, issue a frequency increase or decrease command to the secondary reverse osmosis high-pressure pump and the EDI feed pump.

[0050] In this embodiment, the frequency increase or decrease command is +1Hz or -1Hz.

[0051] In this embodiment, when the flow rate deviation adjustment command is to increase the frequency and the liquid level deviation adjustment command is to decrease the frequency, the flow rate deviation adjustment command is invalid.

[0052] In this embodiment, each water pump has its own allowable frequency range. When the frequency increase or decrease command exceeds the allowable frequency range, the frequency increase or decrease command is not triggered and the corresponding water pump is not adjusted.

[0053] In this embodiment, the allowable frequency adjustment range of the ultrafiltration feed pump is the preset range interval 7.

[0054] In this embodiment, the allowable frequency adjustment range of the primary reverse osmosis high-pressure pump is the preset range interval 8.

[0055] In this embodiment, the allowable frequency adjustment range of the secondary reverse osmosis high-pressure pump is the preset range interval 9.

[0056] In this embodiment, the allowable frequency adjustment range of the EDI feed pump is the preset range interval 10.

[0057] Embodiment 2

[0058] In this embodiment, the present invention is applied to a certain 2×660MW coal-fired thermal power unit. The boiler make-up water treatment system of this plant adopts the full-film method, that is, ultrafiltration + first-stage reverse osmosis + second-stage reverse osmosis + EDI. The output of the ultrafiltration device in this plant is 100t / h, the output of the first-stage reverse osmosis device is 92t / h, the output of the second-stage reverse osmosis device is 78t / h, and the output of the EDI device is 70t / h. The total height of the ultrafiltration product water tank is 5.5m, the height of the first-stage reverse osmosis product water tank is 5.5m, and the height of the second-stage reverse osmosis product water tank is 5m. Refer to Figure 1 The controller makes a judgment every 60 seconds.

[0059] The difference between the ultrafiltration product water flow rate and the first-stage reverse osmosis inlet water flow rate is compared with the preset range interval 1. When the judgment is negative, a corresponding frequency increase or decrease command is issued to the ultrafiltration feed pump.

[0060] The difference between the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis inlet water flow rate is compared with the preset range interval 2. When the judgment is negative, a corresponding frequency increase or decrease command is issued to the first-stage reverse osmosis high-pressure pump.

[0061] The difference between the second-stage reverse osmosis product water flow rate and the EDI inlet water flow rate is compared with the preset range interval 3. When the judgment is negative, a corresponding frequency increase or decrease command is issued to the second-stage reverse osmosis high-pressure pump.

[0062] The ultrafiltration product water tank liquid level is compared with the preset range interval 4. When the judgment is negative, a corresponding frequency increase or decrease command is issued to the ultrafiltration feed pump and the first-stage reverse osmosis high-pressure pump.

[0063] The first-stage reverse osmosis product water tank liquid level is compared with the preset range interval 5. When the judgment is negative, a corresponding frequency increase or decrease command is issued to the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump.

[0064] The second-stage reverse osmosis product water tank liquid level is compared with the preset range interval 6. When the judgment is negative, a corresponding frequency increase or decrease command is issued to the second-stage reverse osmosis high-pressure pump and the EDI feed pump.

[0065] The frequency increase or decrease command is +1Hz or -1Hz.

[0066] The range interval 1 is [-10,10], with the unit of t / h.

[0067] The range interval 2 is [-10,10], with the unit of t / h.

[0068] The range interval 3 is [-10,10], with the unit of t / h.

[0069] The range interval 4 is [2,4], with the unit of m.

[0070] The range interval 5 is [2,4], with the unit of m.

[0071] The range of range interval 6 is [2, 4], with the unit of m.

[0072] The range of range interval 7 is [25, 45], with the unit of Hz.

[0073] The range of range interval 8 is [30, 45], with the unit of Hz.

[0074] The range of range interval 9 is [30, 45], with the unit of Hz.

[0075] The range of range interval 10 is [35, 45], with the unit of Hz.

[0076] After the instruction is issued, the following Figure 2 shown logical judgment process is carried out. When the flow deviation adjustment instruction is to increase the frequency and the liquid level deviation adjustment instruction is to decrease the frequency; or when the flow deviation adjustment instruction is to decrease the frequency and the liquid level deviation adjustment instruction is to decrease the frequency, the flow deviation adjustment instruction is invalid.

[0077] Each water pump has its own allowable frequency range. When the instruction exceeds the allowable frequency range, the instruction is not triggered and the corresponding water pump is not adjusted.

[0078] Embodiment III

[0079] The automatic regulating output control system of the boiler make-up water treatment system of the thermal power plant described in the present invention includes:

[0080] The first control module is used to control the ultrafiltration feed water pump according to the ultrafiltration product water flow rate and the first-stage reverse osmosis inlet water flow rate;

[0081] The second control module is used to control the first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis inlet water flow rate;

[0082] The third control module is used to control the second-stage reverse osmosis high-pressure pump according to the second-stage reverse osmosis product water flow rate and the EDI inlet water flow rate;

[0083] The fourth control module is used to control the ultrafiltration feed water pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration product water tank;

[0084] The fifth control module is used to control the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump according to the liquid level of the first-stage reverse osmosis product water tank;

[0085] The sixth control module is used to control the second-stage reverse osmosis high-pressure pump and the EDI feed water pump according to the liquid level of the second-stage reverse osmosis product water tank.

[0086] In the embodiments of the present application, the division of modules is illustrative and is only a logical function division. In actual implementation, there may be other division methods. In addition, in each embodiment of the present application, each functional module may be integrated in a processor, may exist separately physically, or two or more modules may be integrated in one module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0087] Embodiment 4

[0088] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the automatic regulation output control method of the thermal power plant boiler make-up water treatment system. For example, it includes: controlling the ultrafiltration feed pump according to the ultrafiltration product water flow rate and the first-stage reverse osmosis inlet water flow rate; controlling the first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis inlet water flow rate; controlling the second-stage reverse osmosis high-pressure pump according to the second-stage reverse osmosis product water flow rate and the EDI inlet water flow rate; controlling the ultrafiltration feed pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration product water tank; controlling the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump according to the liquid level of the first-stage reverse osmosis product water tank; controlling the second-stage reverse osmosis high-pressure pump and the EDI feed pump according to the liquid level of the second-stage reverse osmosis product water tank. Among them, the memory may include internal memory, such as high-speed random access memory, and may also include non-volatile memory, such as at least one disk memory, etc.; the processor, network interface, and memory are interconnected through an internal bus, and this internal bus may be an Industry Standard Architecture bus, a Peripheral Component Interconnect standard bus, an Extended Industry 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 program code, and the program code includes computer operation instructions. The memory may include internal memory and non-volatile memory and provide instructions and data to the processor.

[0089] Embodiment 5

[0090] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the steps of the automatic regulation output control method for the boiler make-up water treatment system of a thermal power plant. For example, it includes: controlling an ultrafiltration feed pump according to the ultrafiltration product water flow rate and the first-stage reverse osmosis inlet water flow rate; controlling a first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis product water flow rate and the second-stage reverse osmosis inlet water flow rate; controlling a second-stage reverse osmosis high-pressure pump according to the second-stage reverse osmosis product water flow rate and the EDI inlet water flow rate; controlling the ultrafiltration feed pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration product water tank; controlling the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump according to the liquid level of the first-stage reverse osmosis product water tank; controlling the second-stage reverse osmosis high-pressure pump and the EDI feed pump according to the liquid level of the second-stage reverse osmosis product water tank. 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 random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disc, magnetic disk, etc.

[0091] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0092] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one or more of these processes or multiple processes and / or blocks Figure 1 one or more of these blocks or multiple blocks.

[0093] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one or more of these processes or multiple processes and / or blocksFigure 1 The functions specified in one or more boxes.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 process or multiple processes and / or boxes Figure 1 or more boxes.

[0095] Those skilled in the art will readily conceive of other embodiments of the present invention upon considering the specification and the 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 known common knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0096] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

[0097] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant, characterized in that: include: Control the ultrafiltration water pump according to the ultrafiltration water production flow and the first-stage reverse osmosis water inlet flow; Control the first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis water production flow and the second-stage reverse osmosis water inlet flow; Control the secondary reverse osmosis high-pressure pump according to the secondary reverse osmosis water production flow and EDI water inlet flow; Control the ultrafiltration water supply pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration water production tank; Control the first-stage reverse osmosis high-pressure pump and the second-stage reverse osmosis high-pressure pump according to the liquid level of the first-stage reverse osmosis water production tank; The secondary reverse osmosis high-pressure pump and EDI water feed pump are controlled according to the liquid level of the secondary reverse osmosis water production tank.

2. The method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant according to claim 1 is characterized in that: The difference between the ultrafiltration water production flow rate and the first-stage reverse osmosis water inlet flow rate is compared with the preset range interval 1. When the difference between the ultrafiltration water production flow rate and the first-stage reverse osmosis water inlet flow rate is not within the preset range interval 1, a frequency increase or decrease instruction is issued to the ultrafiltration water feed pump.

3. The method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant according to claim 1, characterized in that: The difference between the primary reverse osmosis water production flow and the secondary reverse osmosis water inlet flow is compared with the preset range interval 2. When the difference between the primary reverse osmosis water production flow and the secondary reverse osmosis water inlet flow is not within the preset range interval 2, a frequency increase or decrease instruction is issued to the primary reverse osmosis high-pressure pump.

4. The method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant according to claim 1, characterized in that: The difference between the secondary reverse osmosis water production flow and the EDI water inlet flow is compared with the preset range interval 3. When the difference between the secondary reverse osmosis water production flow and the EDI water inlet flow is not within the preset range interval 3, a frequency increase or decrease instruction is issued to the secondary reverse osmosis high-pressure pump.

5. The method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant according to claim 1, characterized in that: The liquid level of the ultrafiltration water production tank is compared with the preset range interval 4. When the liquid level of the ultrafiltration water production tank is not within the preset range interval 4, a frequency increase or decrease instruction is issued to the ultrafiltration water feed pump and the first-stage reverse osmosis high-pressure pump.

6. The method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant according to claim 1, characterized in that: The liquid level of the primary reverse osmosis water production tank is compared with the preset range interval 5. When the liquid level of the primary reverse osmosis water production tank is not within the preset range interval 5, a frequency increase or decrease instruction is issued to the primary reverse osmosis high-pressure pump and the secondary reverse osmosis high-pressure pump.

7. The method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant according to claim 1, characterized in that: The liquid level of the secondary reverse osmosis water production tank is compared with the preset range interval 6. When the liquid level of the secondary reverse osmosis water production tank is not within the preset range interval 6, a frequency increase or decrease instruction is issued to the secondary reverse osmosis high-pressure pump and the EDI water supply pump.

8. An automatic output control system for boiler feed water treatment system in thermal power plant, characterized in that: include: The first control module is used to control the ultrafiltration water pump according to the ultrafiltration water production flow rate and the first-stage reverse osmosis water inlet flow rate; The second control module is used to control the first-stage reverse osmosis high-pressure pump according to the first-stage reverse osmosis water production flow rate and the second-stage reverse osmosis water inlet flow rate; The third control module is used to control the secondary reverse osmosis high-pressure pump according to the secondary reverse osmosis water production flow rate and the EDI water inlet flow rate; The fourth control module is used to control the ultrafiltration water supply pump and the first-stage reverse osmosis high-pressure pump according to the liquid level of the ultrafiltration water production tank; A fifth control module, used for controlling the primary reverse osmosis high-pressure pump and the secondary reverse osmosis high-pressure pump according to the liquid level of the primary reverse osmosis water production tank; The sixth control module is used to control the secondary reverse osmosis high-pressure pump and the EDI water supply pump according to the liquid level of the secondary reverse osmosis water production tank.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, the steps of the method for automatically adjusting the output of a boiler feed water treatment system in a thermal power plant as described in any one of claims 1 to 7 are implemented.

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