Intelligent control system and method for water supply treatment of power plant

Abstract

The invention provides a power plant feed water treatment intelligent control system and method, and belongs to the field of power plant water vapor system control. The control system comprises an ammonia adding device, a deoxidant adding device and a control module, the ammonia adding device is used for adding a standard ammonia solution into the condensed water and the feed water, so that the pH value of the feed water is within a preset pH value range; the deoxidant adding device is used for adding a standard deoxidant solution to the condensed water and the feed water, so that the dissolved oxygen concentration of the feed water is within a preset dissolved oxygen concentration range; the control module is used for controlling the flow of the standard ammonia solution added into the condensed water and the feed water by the ammonia adding device according to the real-time flow of the condensed water, the hydrogen conductivity of the feed water, the real-time flow of the feed water, the actual ammonia concentration value of the feed water and the concentration value of the standard ammonia solution; and controlling the flow of the standard deoxidant solution added into the condensed water and the feed water by the deoxidant adding device according to the actual deoxidant concentration value of the feed water and the concentration value of the standard deoxidant solution.

Description

Technical Field

[0001] The present invention relates to the field of water vapor system control in power plants, and in particular to an intelligent control system for feedwater treatment in power plants and a feedwater treatment control method in power plants. Background Art

[0002] In order to inhibit the corrosion of the water vapor system of power plants and ensure the safe and stable operation of the units, power plants mostly use the method of feed water full volatile treatment (AVT) or oxygen and ammonia combined treatment (CWT). For some power plants, the feed water full volatile treatment method is adopted. Different water chemical conditions are adopted under different water quality conditions. The chemical dosing medium mainly uses ammonia and deoxidizers. Common deoxidizers include: hydrazine, dimethyl ketoxime, sodium isoascorbate. Since each dosing equipment is currently in an independent operation state, the feed water treatment method cannot be adjusted in time according to the change of water quality, which is not conducive to improving the automation level of the power plant.

[0003] The existing technology relies on manual control of the amount of medicine added to the water feed according to the changes in the unit load, but this has two disadvantages: first, there is a certain lag in relying on the changes in the unit load to control the amount of medicine added to the water feed; second, the unit load changes frequently, and relying on manual control of the amount of medicine added to the water feed according to the changes in the unit load is cumbersome and has high labor costs. Summary of the invention

[0004] In order to solve the above-mentioned technical defects, the present invention provides an intelligent control system and method for feed water treatment in a power plant. The intelligent control system for feed water treatment in a power plant determines whether it is necessary to add a standard ammonia solution and a standard deoxidizer solution to the condensate or feed water according to the hydrogen conductivity of the feed water through a control module. The present invention realizes automatic dosing of the feed water through the control module to reduce labor costs; and the control module determines whether it is necessary to add chemicals to the feed water based on the hydrogen conductivity of the feed water, thereby solving the problem of a certain lag in controlling the amount of chemicals to be added to the feed water based on changes in the unit load.

[0005] The first aspect of the present invention provides an intelligent control system for feedwater treatment in a power plant, wherein the water vapor system of the power plant comprises: a condenser, a condensate polishing device, a low-pressure heater, a deaerator and a high-pressure heater, the condensate output by the condenser passes through the low-pressure heater and the deaerator in sequence to generate feedwater for heating the boiler of the power plant, and the intelligent control system for feedwater treatment in the power plant comprises: an ammonia adding device, a deoxidizer adding device and a control module;

[0006] The ammonia adding device is used to add standard ammonia solution to the condensate output by the condenser and the feed water generated after the condensate passes through the low-pressure heater and the deaerator in sequence, so that the pH value of the feed water is within a preset pH value range;

[0007] The deoxidizer adding device is used to add a standard deoxidizer solution to the condensate output by the condenser and the feed water generated after the condensate passes through the low-pressure heater and the deoxidizer in sequence, so that the dissolved oxygen concentration of the feed water is within a preset dissolved oxygen concentration range;

[0008] The control module is used to control the flow rate of the standard ammonia solution added to the condensate and the feed water by the ammonia adding device according to the real-time flow rate of the condensate, the hydrogen conductivity of the feed water, the real-time flow rate of the feed water, the actual ammonia concentration value of the feed water, and the concentration value of the standard ammonia solution, and to control the flow rate of the standard deoxidizer solution added to the condensate and the feed water by the deoxidizer adding device according to the actual deoxidizer concentration value of the feed water and the concentration value of the standard deoxidizer solution.

[0009] In the embodiment of the present invention, the ammonia adding device comprises: a condensate ammonia adding mechanism and a feed water ammonia adding mechanism;

[0010] The condensate ammonia adding mechanism comprises: a first standard ammonia solution storage tank, a condensate ammonia adding frequency conversion pump and a condensate ammonia adding flow detector, wherein the first standard ammonia solution storage tank stores a standard ammonia solution, the condensate ammonia adding frequency conversion pump is used to inject the standard ammonia solution stored in the first standard ammonia solution storage tank into the condensate, and the condensate ammonia adding flow detector is used to detect the flow of the standard ammonia solution injected into the condensate;

[0011] The water supply ammonia addition mechanism includes: a second standard ammonia solution storage tank, a water supply ammonia addition frequency conversion pump and a water supply ammonia addition flow detector. The second standard ammonia solution storage tank stores standard ammonia solution. The water supply ammonia addition frequency conversion pump is used to inject the standard ammonia solution stored in the second standard ammonia solution storage tank into the water supply. The water supply ammonia addition flow detector is used to detect the flow rate of the standard ammonia solution injected into the water supply.

[0012] In the embodiment of the present invention, the deoxidizer adding device comprises: a condensate water deoxidizer adding mechanism and a feed water deoxidizer adding mechanism;

[0013] The condensate water deoxidizer mechanism comprises: a first standard deoxidizer solution tank, a condensate water deoxidizer frequency conversion pump and a condensate water deoxidizer flow detector, wherein the first standard deoxidizer solution tank stores a standard deoxidizer solution, the condensate water deoxidizer frequency conversion pump is used to inject the standard deoxidizer solution in the first standard deoxidizer solution storage tank into the condensate, and the condensate water deoxidizer flow detector is used to detect the flow of the standard deoxidizer solution injected into the condensate;

[0014] The water supply and deoxygenator adding mechanism includes: a second standard deoxygenator solution tank, a water supply and deoxygenator adding frequency conversion pump and a water supply and deoxygenator adding flow detector. The second standard deoxygenator solution tank stores a standard deoxygenator solution. The water supply and deoxygenator adding frequency conversion pump is used to inject the standard deoxygenator solution in the second standard deoxygenator solution storage tank into the water supply. The water supply and deoxygenator adding flow detector is used to detect the flow of the standard deoxygenator solution injected into the water supply.

[0015] In an embodiment of the present invention, the control module includes: a parameter acquisition unit, a calculation unit and a control unit;

[0016] The parameter acquisition unit is used to acquire the feed water hydrogen conductivity, the real-time flow rate of condensed water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, the concentration value of the standard ammonia solution, the actual deoxidizer concentration value of feed water and the concentration value of the standard deoxidizer solution;

[0017] The calculation unit is used to calculate the real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution, and is used to calculate the real-time deoxidizer addition flow value of condensate water and the real-time deoxidizer addition flow value of feed water according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water, and the concentration value of standard deoxidizer solution;

[0018] The control unit is used to control the ammonia adding device to add standard ammonia solution to the condensate water according to the calculated real-time ammonia adding flow rate value of the condensate water according to the hydrogen conductivity of the feed water, control the ammonia adding device to add standard ammonia solution to the feed water according to the calculated real-time ammonia adding flow rate value of the feed water, control the deoxidizer device to add standard deoxidizer solution to the condensate water according to the calculated real-time deoxidizer adding flow rate value of the condensate water, and control the deoxidizer device to add deoxidizer solution to the feed water according to the calculated real-time deoxidizer adding flow rate value of the feed water.

[0019] A second aspect of the present invention provides a power plant feedwater treatment control method, comprising:

[0020] The real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water are calculated according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution;

[0021] According to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water and the concentration value of standard deoxidizer solution, the real-time flow rate value of condensate water plus deoxidizer and the real-time flow rate value of feed water plus deoxidizer are calculated;

[0022] According to the hydrogen conductivity of the feed water, the ammonia adding device is controlled to add standard ammonia solution to the condensate output by the condenser according to the real-time ammonia adding flow rate value of the condensate water; the ammonia adding device is controlled to add standard ammonia solution to the feed water generated after the condensate water passes through the low-pressure heater and the deaerator in sequence according to the real-time ammonia adding flow rate value of the feed water; the deoxidizer device is controlled to add standard deoxidizer solution to the condensate output by the condenser according to the real-time deoxidizer adding flow rate value of the condensate water; and the deoxidizer device is controlled to add standard deoxidizer solution to the feed water generated after the condensate water passes through the low-pressure heater and the deaerator in sequence according to the real-time deoxidizer adding flow rate value of the feed water.

[0023] In an embodiment of the present invention, the method further includes:

[0024] Obtain the hydrogen conductivity of the feed water, the real-time flow rate of the condensed water, the real-time flow rate of the feed water, the actual ammonia concentration value of the feed water, the concentration value of the standard ammonia solution, the actual deoxidizer concentration value of the feed water, and the concentration value of the standard deoxidizer solution.

[0025] In an embodiment of the present invention, the method further includes:

[0026] The actual ammonia concentration value of the feed water is calculated according to the actual conductivity value of the feed water.

[0027] In the embodiment of the present invention, the real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water are calculated according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution, including:

[0028] Calculating a target ammonia concentration value of the feed water according to a preset pH value range of the feed water;

[0029] Calculate the difference between the actual ammonia concentration of the feed water and the target ammonia concentration of the feed water to obtain the supplementary value of the ammonia concentration of the feed water;

[0030] The real-time ammonia addition flow value of condensate water is calculated according to the real-time flow rate of condensate water, the supplementary value of feed water ammonia concentration and the concentration value of standard ammonia solution;

[0031] The real-time ammonia addition flow value of the water supply is calculated based on the real-time flow rate of the water supply, the ammonia concentration supplement value of the water supply and the concentration value of the standard ammonia solution.

[0032] In the embodiment of the present invention, the real-time flow rate of condensate water plus deoxidizer and the real-time flow rate of feed water plus deoxidizer are calculated according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water and the concentration value of the standard deoxidizer solution, including:

[0033] Calculating a target deoxygenator concentration value for the feed water according to a preset dissolved oxygen concentration range of the feed water;

[0034] Calculate the difference between the actual deoxidizer concentration value of the feed water and the target deoxidizer concentration value of the feed water to obtain the feed water deoxidizer concentration supplement value;

[0035] Calculate the real-time deoxidizer flow rate of condensate water according to the real-time flow rate of condensate water, the supplementary value of deoxidizer concentration in feed water and the concentration value of standard ammonia solution;

[0036] The real-time feed water deoxidizer flow rate value is calculated based on the real-time feed water flow rate, the feed water deoxidizer concentration supplement value and the concentration value of the standard ammonia solution.

[0037] In an embodiment of the present invention, the method of controlling the ammonia adding device according to the hydrogen conductivity of the feed water to add a standard ammonia solution to the condensate output by the condenser according to the real-time ammonia adding flow value of the condensate, controlling the ammonia adding device to add a standard ammonia solution to the feed water generated after the condensate passes through the low-pressure heater and the deaerator in sequence according to the real-time ammonia adding flow value of the feed water, controlling the deoxidizer device to add a standard deoxidizer solution to the condensate output by the condenser according to the real-time deoxidizer adding flow value of the condensate, and controlling the deoxidizer device to add a standard deoxidizer solution to the feed water generated after the condensate passes through the low-pressure heater and the deoxidizer in sequence according to the real-time deoxidizer adding flow value of the feed water, includes:

[0038] When the hydrogen conductivity of the feed water is less than a first preset value, the ammonia adding device is controlled to add a standard ammonia solution to the condensate outputted from the condenser according to the calculated real-time ammonia adding flow rate value of the condensate water, and it is judged whether the pH value of the feed water generated after the condensate water passes through the low-pressure heater and the deaerator in sequence within a preset time period after the standard ammonia solution is added to the condensate water can be within a preset pH value range; if the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add the standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water;

[0039] When the hydrogen conductivity of the feed water is greater than or equal to the first preset value and less than the second preset value, the ammonia adding device is controlled to add the standard ammonia solution to the condensate output by the condenser according to the calculated real-time ammonia adding flow rate value of the condensate, and the deoxidizer adding device is controlled to add the standard deoxidizer solution to the condensate according to the calculated real-time deoxidizer adding flow rate value of the condensate, and it is judged whether the pH value of the feed water generated after the condensate passes through the low-pressure heater and the deoxidizer in sequence within the preset time period after the addition of the standard ammonia solution and the standard deoxidizer solution to the condensate is within the preset pH value range and whether the dissolved oxygen concentration value is within the preset dissolved oxygen concentration range; if the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add the standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water; if the dissolved oxygen concentration value of the feed water is not within the preset dissolved oxygen concentration range, the deoxidizer adding device is controlled to add the standard deoxidizer solution to the feed water according to the real-time deoxidizer adding flow rate value of the feed water.

[0040] The present invention uses a control module to determine whether it is necessary to add a standard ammonia solution and a standard deoxidizer solution to the condensate or the feed water according to the hydrogen conductivity of the feed water. The present invention uses the control module to realize automatic dosing of the feed water, thereby reducing labor costs. The control module relies on the hydrogen conductivity of the feed water to determine whether it is necessary to add chemicals to the feed water, thereby solving the problem of a certain lag in controlling the amount of chemicals added to the feed water by relying on changes in the unit load.

[0041] Other features and advantages of the technical solution of the present invention will be described in detail in the specific implementation section below. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present invention and constitute a part 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 drawings:

[0043] Figure 1 It is a structural schematic diagram of an intelligent control system for water treatment in a power plant provided by an embodiment of the present invention;

[0044] Figure 2 It is a flow chart of a feed water treatment control method for a power plant provided by an embodiment of the present invention.

[0045] Description of Reference Numerals

[0046] 1- condenser, 2- condensate polishing device, 3- low-pressure heater, 4- deaerator, 5- feed water pump, 6- high-pressure heater, 7- condensate ammonia adding mechanism, 701- first standard ammonia solution storage tank, 702- condensate ammonia adding frequency conversion pump, 703- condensate ammonia adding flow detector, 8- feed water ammonia adding mechanism, 801- second standard ammonia solution storage tank, 802- feed water ammonia adding frequency conversion pump, 803- feed water ammonia adding flow detector, 9- condensate adding deoxidant mechanism, 901- first standard deoxidant solution tank, 902- condensate adding deoxidant frequency conversion pump, 903- condensate adding deoxidant flow detector, 10- feed water adding deoxidant mechanism, 1001- second standard deoxidant solution tank, 1002- feed water adding deoxidant frequency conversion pump, 1003- feed water adding deoxidant flow detector, 11- control module. DETAILED DESCRIPTION

[0047] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the process of realizing the present invention, the inventors found that in order to inhibit the corrosion of the water vapor system of the power plant and ensure the safe and stable operation of the unit, the power plant mostly adopts the method of full volatile treatment (AVT) or combined treatment of oxygen and ammonia (CWT) for water supply. For some power plants, the full volatile treatment method for water supply is adopted, and different water chemical conditions are adopted under different water quality conditions. The chemical dosing medium mainly uses ammonia and deoxidizers. Common deoxidizers include: hydrazine, dimethyl ketoxime, sodium isoascorbate. Since each dosing equipment is currently in an independent operation state, the water supply treatment method cannot be adjusted in time according to the change of water quality, which is not conducive to the improvement of the automation degree of the power plant. The existing technology relies on manual control of the dosing amount of water supply according to the change of unit load, but this has two disadvantages: first, there is a certain hysteresis in relying on the change of unit load to control the dosing amount of water supply; second, the unit load changes frequently, and it is cumbersome to rely on manual control of the dosing amount of water supply according to the change of unit load, and the labor cost is high.

[0052] In view of the above problems, an embodiment of the present invention provides an intelligent control system for feedwater treatment in a power plant, wherein the water vapor system of the power plant comprises: a condenser, a condensate polishing device, a low-pressure heater, a deaerator and a high-pressure heater, and the condensate output by the condenser passes through the low-pressure heater and the deaerator in sequence to generate feedwater for heating the boiler of the power plant, and the intelligent control system for feedwater treatment in the power plant comprises: an ammonia adding device, a deoxidizer adding device and a control module;

[0053] The ammonia adding device is used to add standard ammonia solution to the condensate output by the condenser and the feed water generated after the condensate passes through the low-pressure heater and the deaerator in sequence, so that the pH value of the feed water is within a preset pH value range;

[0054] The deoxidizer adding device is used to add a standard deoxidizer solution to the condensate output by the condenser and the feed water generated after the condensate passes through the low-pressure heater and the deoxidizer in sequence, so that the dissolved oxygen concentration of the feed water is within a preset dissolved oxygen concentration range;

[0055] The control module is used to control the flow rate of the standard ammonia solution added to the condensate and the feed water by the ammonia adding device according to the real-time flow rate of the condensate, the hydrogen conductivity of the feed water, the real-time flow rate of the feed water, the actual ammonia concentration value of the feed water, and the concentration value of the standard ammonia solution, and to control the flow rate of the standard deoxidizer solution added to the condensate and the feed water by the deoxidizer adding device according to the actual deoxidizer concentration value of the feed water and the concentration value of the standard deoxidizer solution. The power plant feed water treatment intelligent control system determines whether it is necessary to add standard ammonia solution and standard deoxidizer solution to the condensate or feed water according to the hydrogen conductivity of the feed water through the control module. The present invention realizes automatic dosing of the feed water through the control module, reducing labor costs; and the control module relies on the hydrogen conductivity of the feed water to determine whether it is necessary to add agents to the feed water, solving the problem of a certain hysteresis in controlling the dosing amount of the feed water by relying on the load change of the unit.

[0056] Figure 1 Schematic diagram of the structure of the intelligent control system for water treatment in a power plant provided by an embodiment of the present invention. Figure 1 As shown, the power plant feed water treatment intelligent control system provided in this embodiment is used to process the feed water required by the power plant, wherein the power plant water steam system includes: a condenser 1, a condensate polishing device 2, a low-pressure heater 3, a deaerator 4, a feed water pump 5 and a high-pressure heater 6 connected in sequence, the condensate output by the condenser 1 is purified by the condensate polishing device 2, and then deoxygenated by the low-pressure heater 3 and the deaerator 4 in sequence to generate feed water, and the feed water pump 5 heats the feed water through the high-pressure heater 6 and then transports it to the boiler of the power plant.

[0057] The power plant feed water treatment control system provided in this embodiment includes: an ammonia adding device, a deoxidizer adding device and a control module 11; wherein the ammonia adding device includes: a condensate water ammonia adding mechanism 7 and a feed water ammonia adding mechanism 8; the deoxidizer adding device includes: a condensate water deoxidizer adding mechanism 9 and a feed water deoxidizer adding mechanism 10; the control module 11 includes: a parameter acquisition unit, a calculation unit and a control unit.

[0058] Among them, the condensate ammonia adding mechanism 7 includes: a first standard ammonia solution storage tank 701, a condensate ammonia adding frequency conversion pump 702 and a condensate ammonia adding flow detector 703. The first standard ammonia solution storage tank 701 stores standard ammonia solution. The condensate ammonia adding frequency conversion pump 702 is used to inject the standard ammonia solution stored in the first standard ammonia solution storage tank 701 into the condensate. The condensate ammonia adding flow detector 703 is used to detect the flow of the standard ammonia solution injected into the condensate.

[0059] The water supply ammonia adding mechanism 8 includes: a second standard ammonia solution storage tank 801, a water supply ammonia adding frequency conversion pump 802 and a water supply ammonia adding flow detector 803. The second standard ammonia solution storage tank 801 stores standard ammonia solution. The water supply ammonia adding frequency conversion pump 802 is used to inject the standard ammonia solution stored in the second standard ammonia solution storage tank 801 into the water supply. The water supply ammonia adding flow detector 803 is used to detect the flow rate of the standard ammonia solution injected into the water supply.

[0060] The condensate water adding deoxidizer mechanism 9 includes: a first standard deoxidizer solution tank 901, a condensate water adding deoxidizer frequency conversion pump 902 and a condensate water adding deoxidizer flow detector 903. The first standard deoxidizer solution tank 901 stores a standard deoxidizer solution. The condensate water adding deoxidizer frequency conversion pump 902 is used to inject the standard deoxidizer solution in the first standard deoxidizer solution storage tank into the condensate. The condensate water adding deoxidizer flow detector 903 is used to detect the flow of the standard deoxidizer solution injected into the condensate.

[0061] The water supply deoxygenator adding mechanism 10 comprises: a second standard deoxygenator solution tank 1001, a water supply deoxygenator adding frequency conversion pump 1002 and a water supply deoxygenator adding flow detector 1003. The second standard deoxygenator solution tank 1001 stores a standard deoxygenator solution. The water supply deoxygenator adding frequency conversion pump 1002 is used to inject the standard deoxygenator solution in the second standard deoxygenator solution storage tank into the water supply. The water supply deoxygenator adding flow detector 1003 is used to detect the flow rate of the standard deoxygenator solution injected into the water supply.

[0062] In this embodiment, the ammonia adding device is used to add standard ammonia solution to the condensate output after the condenser 1 and the condensate polishing device 2 are processed in sequence, and the feed water generated after the condensate passes through the low-pressure heater 3 and the deaerator 4 in sequence, so that the pH value of the feed water is within the preset pH value range, including:

[0063] The condensate output after being processed in sequence by the condensate ammonia adding mechanism 7 is added with standard ammonia solution, so that the pH value of the feed water is within the preset pH value range.

[0064] The feed water ammonia adding mechanism 8 generated by the condensed water passing through the low-pressure heater 3 and the deaerator 4 in sequence adds standard ammonia solution to the feed water, so that the pH value of the feed water is within the preset pH value range.

[0065] Furthermore, the output ends of the condensate ammonia adding mechanism 7 and the feed water ammonia adding mechanism 8 are connected to the pipeline between the condensate polishing device 2 and the low-pressure heater 3 through a connecting pipe, so as to add standard ammonia solution to the condensate flowing from the condensate polishing device 2 to the low-pressure heater 3.

[0066] In this embodiment, the deoxidizer adding device is used to add a standard deoxidizer solution to the condensate output after the condenser 1 and the condensate polishing device 2 are processed in sequence, and the feed water generated after the condensate passes through the low-pressure heater 3 and the deoxidizer 4 in sequence, so that the dissolved oxygen concentration of the feed water is within a preset dissolved oxygen concentration range, including:

[0067] The condensate output after being processed in sequence by the condenser 1 and the condensate polishing device 2 is added with a standard deoxidizer solution by the condensate adding deoxidizer mechanism 9, so that the dissolved oxygen concentration of the feed water is within a preset dissolved oxygen concentration range.

[0068] The feed water deoxidizer adding mechanism 10 adds a standard deoxidizer solution to the feed water generated after the condensate passes through the low-pressure heater 3 and the deoxidizer 4 in sequence, so that the dissolved oxygen concentration of the feed water is within a preset solution oxygen concentration range.

[0069] Furthermore, the output ends of the condensate adding deoxidizer mechanism 9 and the feed water adding deoxidizer mechanism 10 are connected to the pipeline between the deoxidizer 4 and the feed water pump 5 through a connecting pipeline, so as to add a standard deoxidizer solution to the feed water flowing from the deoxidizer 4 to the feed water pump 5.

[0070] In this embodiment, the control module 11 is used to control the flow rate of the standard ammonia solution added to the condensate and the feed water by the ammonia adding device according to the real-time flow rate of the condensate, the hydrogen conductivity of the feed water, the real-time flow rate of the feed water, the actual ammonia concentration value of the feed water, and the concentration value of the standard ammonia solution, and control the flow rate of the standard deoxidizer solution added to the condensate and the feed water by the deoxidizer adding device according to the actual deoxidizer concentration value of the feed water and the concentration value of the standard deoxidizer solution, including:

[0071] The parameter acquisition unit is used to acquire the feed water hydrogen conductivity, the real-time flow rate of condensed water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, the concentration value of the standard ammonia solution, the actual deoxidizer concentration value of feed water and the concentration value of the standard deoxidizer solution;

[0072] Furthermore, the parameter acquisition unit is also used to obtain real-time pH value of the feed water and dissolved oxygen concentration value of the feed water.

[0073] The calculation unit is used to calculate the real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution, and is used to calculate the real-time deoxidizer addition flow value of condensate water and the real-time deoxidizer addition flow value of feed water according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water, and the concentration value of standard deoxidizer solution;

[0074] Specifically, the computing unit is specifically used for:

[0075] Calculating a target ammonia concentration value of the feed water according to a preset pH value range of the feed water;

[0076] Calculate the difference between the actual ammonia concentration of the feed water and the target ammonia concentration of the feed water to obtain the supplementary value of the ammonia concentration of the feed water;

[0077] The real-time ammonia addition flow value of condensate water is calculated according to the real-time flow rate of condensate water, the supplementary value of feed water ammonia concentration and the concentration value of standard ammonia solution;

[0078] The real-time ammonia addition flow value of the water supply is calculated based on the real-time flow rate of the water supply, the ammonia concentration supplement value of the water supply and the concentration value of the standard ammonia solution.

[0079] Calculating a target deoxygenator concentration value for the feed water according to a preset dissolved oxygen concentration range of the feed water;

[0080] Calculate the difference between the actual deoxidizer concentration value of the feed water and the target deoxidizer concentration value of the feed water to obtain the feed water deoxidizer concentration supplement value;

[0081] Calculate the real-time deoxidizer flow rate of condensate water according to the real-time flow rate of condensate water, the supplementary value of deoxidizer concentration in feed water and the concentration value of standard ammonia solution;

[0082] The real-time feed water deoxidizer flow rate value is calculated based on the real-time feed water flow rate, the feed water deoxidizer concentration supplement value and the concentration value of the standard ammonia solution.

[0083] The control unit is used to control the ammonia adding device to add standard ammonia solution to the condensate water according to the calculated real-time ammonia adding flow rate value of the condensate water according to the hydrogen conductivity of the feed water, control the ammonia adding device to add standard ammonia solution to the feed water according to the calculated real-time ammonia adding flow rate value of the feed water, control the deoxidizer device to add standard deoxidizer solution to the condensate water according to the calculated real-time deoxidizer adding flow rate value of the condensate water, and control the deoxidizer device to add deoxidizer solution to the feed water according to the calculated real-time deoxidizer adding flow rate value of the feed water.

[0084] Furthermore, the control unit is specifically used for:

[0085] When the hydrogen conductivity of the feed water is less than a first preset value, the ammonia adding device is controlled to add a standard ammonia solution to the condensate outputted from the condenser 1 and purified by the condensate polishing device 2 according to the calculated real-time ammonia adding flow rate value of the condensate, and it is judged whether the pH value of the feed water generated after the condensate passes through the low-pressure heater 3 and the deaerator 4 in sequence within a preset time period after the standard ammonia solution is added to the condensate is within a preset pH value range; if the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add the standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water;

[0086] When the hydrogen conductivity of the feed water is greater than or equal to the first preset value and less than the second preset value, the ammonia adding device is controlled to add standard ammonia solution to the condensate output by the condenser 1 and purified by the condensate polishing device 2 according to the calculated real-time ammonia adding flow rate value of the condensate, and the deoxidizer adding device is controlled to add standard deoxidizer solution to the condensate according to the calculated real-time deoxidizer adding flow rate value of the condensate, and it is judged whether the pH value of the feed water generated after the condensate passes through the low-pressure heater 3 and the deoxidizer 4 in sequence within the preset pH value range and whether the dissolved oxygen concentration value is within the preset dissolved oxygen concentration range within the preset time period after the standard ammonia solution and the standard deoxidizer solution are added to the condensate. If the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water. If the dissolved oxygen concentration value of the feed water is not within the preset dissolved oxygen concentration range, the deoxidizer adding device is controlled to add standard deoxidizer solution to the feed water according to the real-time deoxidizer adding flow rate value of the feed water.

[0087] When the hydrogen conductivity of the feed water is greater than the second preset value, the condensate ammonia adding mechanism 7 is controlled to add standard ammonia solution to the condensate purified by the condensate polishing device 2 according to the calculated real-time ammonia adding flow rate of the condensate, and the condensate deoxidizer adding mechanism 9 is controlled to add standard deoxidizer solution to the condensate according to the calculated real-time deoxidizer adding flow rate of the condensate, and the feed water deoxidizer adding mechanism 10 is controlled to add standard deoxidizer solution to the feed water output by the deaerator 4 according to the obtained real-time deoxidizer adding flow rate of the feed water, so as to change the hydrogen conductivity of the feed water; it is judged whether the hydrogen conductivity of the feed water is still greater than the second preset value within the preset time period after the standard ammonia solution and the standard deoxidizer solution are added to the condensate. If the hydrogen conductivity of the feed water is still greater than the second preset value, the power plant is controlled to shut down according to the three-level treatment requirements when the water vapor quality deteriorates. When the unit is shut down, the condensate flow rate is 0m 3 / h, according to the theoretical dosage calculation formula of ammonia water Q a =(Q×C a ) / C and the theoretical dosage calculation formula of deoxidizer Q L =(Q×C h ) / C L , the dosage is 0m 3 / h, the control module 11 promptly shuts down the ammonia adding and deoxidizer adding variable frequency pumps.

[0088] In this embodiment, the control module 11 is a PLC control system.

[0089] In this embodiment, the first preset value is 0.15 μS / cm, and the second preset value is 0.3 μS / cm.

[0090] In this embodiment, in a copper-free water supply system, the preset pH value range is: 9.2-9.6, and in a copper-containing water supply system, the preset pH value range is: 8.8-9.3.

[0091] In this embodiment, the preset time period is within 20 minutes.

[0092] In this embodiment, the dissolved oxygen concentration range of the feed water is: ≤7 μg / L.

[0093] Figure 2 FIG. 1 is a flow chart of a power plant feedwater treatment control method provided by an embodiment of the present invention. Figure 2 As shown, the power plant feed water treatment control method provided in this embodiment includes:

[0094] S1. Calculate the real-time ammonia flow rate of condensate and the real-time ammonia flow rate of feed water according to the real-time flow rate of condensate, the real-time flow rate of feed water, the actual ammonia concentration of feed water, and the concentration value of the standard ammonia solution;

[0095] S2. According to the real-time flow rate of condensate, the real-time flow rate of water supply, the actual deoxidizer concentration of water supply and the concentration value of the standard deoxidizer solution, the real-time condensate plus deoxidizer flow rate value and the real-time deoxidizer flow rate value of water supply are calculated;

[0096] S3. Control the ammonia adding device according to the hydrogen conductivity of the feed water to add standard ammonia solution to the condensate output from the condenser 1 according to the real-time ammonia adding flow rate value of the condensate, control the ammonia adding device to add standard ammonia solution to the feed water generated after the condensate passes through the low-pressure heater 3 and the deaerator 4 in sequence according to the real-time ammonia adding flow rate value of the feed water, control the deoxidizer device to add standard deoxidizer solution to the condensate output from the condenser 1 according to the real-time deoxidizer adding flow rate value of the condensate, and control the deoxidizer device to add standard deoxidizer solution to the feed water generated after the condensate passes through the low-pressure heater 3 and the deoxidizer 4 in sequence according to the real-time deoxidizer adding flow rate value of the feed water.

[0097] In this embodiment, the method further includes:

[0098] Obtain feed water hydrogen conductivity, real-time flow of condensed water, real-time flow of feed water, actual ammonia concentration value of feed water, concentration value of standard ammonia solution, actual deoxidizer concentration value of feed water and concentration value of standard deoxidizer solution.

[0099] In this embodiment, the method further includes:

[0100] The actual ammonia concentration value of the feed water and the actual pH value of the feed water are calculated based on the actual conductivity value of the feed water.

[0101] Specifically, the actual ammonia concentration of the feed water is calculated by the following formula:

[0102] C = (13.2 × K2 + 62.7 × K) × 10 -3 (mg / L)

[0103] Where K is the actual conductivity value of the feed water.

[0104] Under pure water conditions (hydrogen conductivity less than 0.3μS / cm), the conductivity value K required to maintain the water supply is calculated based on pH=8.57+logK.

[0105] Furthermore, the concentration of the standard ammonia solution in the first standard ammonia solution tank and the concentration of the standard ammonia solution in the second standard ammonia solution tank can be calculated by the above formula. The conductivity value corresponding to the preset pH value range of the feed water.

[0106] In this embodiment, the real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water are calculated according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution, including:

[0107] Calculating a target ammonia concentration value of the feed water according to a preset pH value range of the feed water;

[0108] Calculate the difference between the actual ammonia concentration of the feed water and the target ammonia concentration of the feed water to obtain the supplementary value of the ammonia concentration of the feed water;

[0109] The real-time ammonia addition flow value of condensate water is calculated according to the real-time flow rate of condensate water, the supplementary value of feed water ammonia concentration and the concentration value of standard ammonia solution;

[0110] The real-time ammonia addition flow value of the water supply is calculated based on the real-time flow rate of the water supply, the ammonia concentration supplement value of the water supply and the concentration value of the standard ammonia solution.

[0111] Specifically, according to the theoretical dosage calculation formula of ammonia water, Q a =(Q×C a ) / C, the theoretical dosage Q can be derived a It changes with the change of the real-time flow rate Q of the condensate. Therefore, in the present invention, the real-time flow rate value of adding ammonia to the condensate and the real-time flow rate value of adding ammonia to the water can be calculated by calculating the supplementary value of the feed water ammonia concentration. a The theoretical dosage of ammonia water, Q is the real-time flow rate of condensate water, C a The target ammonia concentration of the feed water is C, which is the standard ammonia solution concentration.

[0112] In this embodiment, the real-time flow rate of condensate water plus deoxidizer and the real-time flow rate of feed water plus deoxidizer are calculated based on the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water, and the concentration value of the standard deoxidizer solution, including:

[0113] Calculating a target deoxygenator concentration value for the feed water according to a preset dissolved oxygen concentration range of the feed water;

[0114] Calculate the difference between the actual deoxidizer concentration value of the feed water and the target deoxidizer concentration value of the feed water to obtain the feed water deoxidizer concentration supplement value;

[0115] Calculate the real-time deoxidizer flow rate of condensate water according to the real-time flow rate of condensate water, the supplementary value of deoxidizer concentration in feed water and the concentration value of standard ammonia solution;

[0116] The real-time feed water deoxidizer flow rate value is calculated based on the real-time feed water flow rate, the feed water deoxidizer concentration supplement value and the concentration value of the standard ammonia solution.

[0117] Similarly, according to the theoretical dosage formula of deoxidizer Q L =(Q×C h ) / C L , it can be deduced that the theoretical dosage of deoxidizer Q LIt changes with the change of the real-time flow rate Q of the condensate. Therefore, in the present invention, the real-time flow rate value of adding deoxidizer to the condensate and the real-time flow rate value of adding deoxidizer to the water can be calculated by calculating the supplementary value of the deoxidizer concentration of the water feed. Q L The theoretical dosage of deoxidizer, Q is the real-time flow rate of condensate, C h is the target deoxidizer concentration value for feed water, C L is the concentration value of standard deoxidizer solution.

[0118] In this embodiment, the method of controlling the ammonia adding device according to the hydrogen conductivity of the feed water to add a standard ammonia solution to the condensate outputted from the condenser 1 according to the real-time ammonia adding flow value of the condensate, controlling the ammonia adding device to add a standard ammonia solution to the feed water generated after the condensate passes through the low-pressure heater 3 and the deaerator 4 in sequence according to the real-time ammonia adding flow value of the feed water, controlling the deoxidizer device to add a standard deoxidizer solution to the condensate outputted from the condenser 1 according to the real-time deoxidizer adding flow value of the condensate, and controlling the deoxidizer device to add a standard deoxidizer solution to the feed water generated after the condensate passes through the low-pressure heater 3 and the deoxidizer 4 in sequence according to the real-time deoxidizer adding flow value of the feed water, includes:

[0119] When the hydrogen conductivity of the feed water is less than a first preset value, the ammonia adding device is controlled to add a standard ammonia solution to the condensate outputted from the condenser 1 and purified by the condensate polishing device 2 according to the calculated real-time ammonia adding flow rate value of the condensate, and it is judged whether the pH value of the feed water generated after the condensate passes through the low-pressure heater 3 and the deaerator 4 in sequence within a preset time period after the standard ammonia solution is added to the condensate is within a preset pH value range; if the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add the standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water;

[0120] When the hydrogen conductivity of the feed water is greater than or equal to the first preset value and less than the second preset value, the ammonia adding device is controlled to add standard ammonia solution to the condensate output by the condenser 1 and purified by the condensate polishing device 2 according to the calculated real-time ammonia adding flow rate value of the condensate, and the deoxidizer adding device is controlled to add standard deoxidizer solution to the condensate according to the calculated real-time deoxidizer adding flow rate value of the condensate, and it is judged whether the pH value of the feed water generated after the condensate passes through the low-pressure heater 3 and the deoxidizer 4 in sequence within the preset pH value range and whether the dissolved oxygen concentration value is within the preset dissolved oxygen concentration range within the preset time period after the standard ammonia solution and the standard deoxidizer solution are added to the condensate. If the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water. If the dissolved oxygen concentration value of the feed water is not within the preset dissolved oxygen concentration range, the deoxidizer adding device is controlled to add standard deoxidizer solution to the feed water according to the real-time deoxidizer adding flow rate value of the feed water.

[0121] When the feed water hydrogen conductivity is greater than the second preset value, the condensate ammonia adding mechanism 7 is controlled to add standard ammonia solution to the condensate output by the condensate polishing device 2 according to the calculated real-time condensate ammonia adding flow rate value, and the condensate deoxidizer adding mechanism 9 is controlled to add standard deoxidizer solution to the condensate according to the calculated real-time condensate adding flow rate value, and the feed water deoxidizer adding mechanism 10 is controlled to add standard deoxidizer solution to the feed water output by the deaerator 4 according to the obtained real-time feed water deoxidizer adding flow rate value, so as to change the feed water hydrogen conductivity; it is judged whether the hydrogen conductivity of the feed water is still greater than the second preset value within the preset time period after the standard ammonia solution and the standard deoxidizer solution are added to the condensate. If the hydrogen conductivity of the feed water is still greater than the second preset value, the power plant is controlled to shut down according to the three-level treatment requirements when the water vapor quality deteriorates. When the unit is shut down, the condensate flow rate is 0m 3 / h, according to the theoretical dosage calculation formula of ammonia water Q a =(Q×C a ) / C and the theoretical dosage calculation formula of deoxidizer Q L =(Q×C h ) / C L , the dosage is 0m 3 / h, the control module 11 promptly shuts down the ammonia and deoxidizer adding variable frequency pumps.

[0122] Specifically, when the hydrogen conductivity of the feed water is ≤0.15μS / cm, the PLC control system only starts the condensate adding ammonia mechanism 7, and uses the real-time condensate flow rate as feedforward and the measured value of the feed water conductivity as feedback to perform PID control on the condensate adding ammonia variable frequency pump 702, and control the feed water pH at 9.2-9.6 (copper-free water supply system) or 8.8-9.3 (copper water supply system). When the feed water pH cannot reach the target value within 20 minutes, the feed water adding ammonia variable frequency pump 802 is started in time at a fixed frequency to make the feed water pH reach the target value as soon as possible.

[0123] When the feed water hydrogen conductivity is ≥0.15μS / cm and <0.3μS / cm, the PLC control system starts the condensate water ammonia adding mechanism 7 and the condensate water deoxidizer adding mechanism 9, and uses the real-time flow rate of the condensate water as the feedforward, and the measured value of the feed water conductivity as the feedback to perform PID control on the condensate water ammonia adding frequency conversion pump 702, and the measured value of the feed water deoxidizer concentration as the feedback to perform PID control on the condensate water deoxidizer adding frequency conversion pump 902, and controls the feed water pH to be between 9.2 and 9.6 (copper-free feed water system). system) or 8.8~9.3 (with copper water supply system), the deoxidizer concentration is 10~30μg / L, the dissolved oxygen concentration is ≤7μg / L. When the water supply pH cannot reach the target value within 20min, start the water supply ammonia frequency conversion pump 5 in time to make the water supply pH reach the target value as soon as possible at a fixed frequency. When the water supply dissolved oxygen concentration cannot be ≤7μg / L within 20min, start the water supply deoxidizer frequency conversion pump 1002 in time to make the water supply dissolved oxygen concentration ≤7μg / L as soon as possible at a fixed frequency.

[0124] When the feed water hydrogen conductivity is ≥0.3μS / cm, the PLC control system starts the condensate adding ammonia mechanism 7, the condensate adding deoxidizer mechanism 9 and the feed water adding deoxidizer mechanism 10 to perform reductive total volatile treatment (AVT(R)), controls the feed water pH at 9.2-9.6 (copper-free feed water system) or 8.8-9.3 (copper feed water system), and the dissolved oxygen concentration is ≤7μg / L. According to the three-level treatment requirements when the water vapor quality deteriorates, the system will be shut down if the water quality cannot return to normal within the specified time.

[0125] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0126] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0127] The optional implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings. However, the implementation modes of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the implementation modes of the present invention, a variety of simple modifications can be made to the technical solutions of the implementation modes of the present invention, and these simple modifications all belong to the protection scope of the implementation modes of the present invention. It should also be noted that the various specific technical features described in the above specific implementation modes can be combined in any suitable manner without contradiction, and as long as the combination does not violate the concept of the implementation modes of the present invention, it should also be regarded as the content disclosed in the implementation modes of the present invention.

Claims

1. An intelligent control system for water treatment in a power plant, the water vapor system of the power plant comprising: Condenser, low-pressure heater and deaerator, the condensate output from the condenser passes through the low-pressure heater and deaerator in sequence to generate feed water for heating the boiler of the power plant, characterized in that the power plant feed water treatment intelligent control system includes: an ammonia adding device, a deoxidizer adding device and a control module; The ammonia adding device is used to add standard ammonia solution to the condensate output by the condenser and the feed water generated after the condensate passes through the low-pressure heater and the deaerator in sequence, so that the pH value of the feed water is within a preset pH value range; The deoxidizer adding device is used to add a standard deoxidizer solution to the condensate output by the condenser and the feed water generated after the condensate passes through the low-pressure heater and the deoxidizer in sequence, so that the dissolved oxygen concentration of the feed water is within a preset dissolved oxygen concentration range; The control module is used to control the flow rate of the standard ammonia solution added to the condensate and the feed water by the ammonia adding device according to the real-time flow rate of the condensate, the hydrogen conductivity of the feed water, the real-time flow rate of the feed water, the actual ammonia concentration value of the feed water, and the concentration value of the standard ammonia solution, and to control the flow rate of the standard deoxidizer solution added to the condensate and the feed water by the deoxidizer adding device according to the actual deoxidizer concentration value of the feed water and the concentration value of the standard deoxidizer solution.

2. The intelligent control system for water treatment in a power plant according to claim 1, characterized in that: The ammonia adding device comprises: a condensate ammonia adding mechanism and a feed water ammonia adding mechanism; The condensate ammonia adding mechanism comprises: a first standard ammonia solution storage tank, a condensate ammonia adding frequency conversion pump and a condensate ammonia adding flow detector, wherein the first standard ammonia solution storage tank stores a standard ammonia solution, the condensate ammonia adding frequency conversion pump is used to inject the standard ammonia solution stored in the first standard ammonia solution storage tank into the condensate, and the condensate ammonia adding flow detector is used to detect the flow of the standard ammonia solution injected into the condensate; The water supply ammonia addition mechanism includes: a second standard ammonia solution storage tank, a water supply ammonia addition frequency conversion pump and a water supply ammonia addition flow detector. The second standard ammonia solution storage tank stores standard ammonia solution. The water supply ammonia addition frequency conversion pump is used to inject the standard ammonia solution stored in the second standard ammonia solution storage tank into the water supply. The water supply ammonia addition flow detector is used to detect the flow rate of the standard ammonia solution injected into the water supply.

3. The intelligent control system for water treatment in a power plant according to claim 1, characterized in that: The deoxidizer adding device comprises: a condensate water deoxidizer adding mechanism and a feed water deoxidizer adding mechanism; The condensate water deoxidizer mechanism comprises: a first standard deoxidizer solution tank, a condensate water deoxidizer frequency conversion pump and a condensate water deoxidizer flow detector, wherein the first standard deoxidizer solution tank stores a standard deoxidizer solution, the condensate water deoxidizer frequency conversion pump is used to inject the standard deoxidizer solution in the first standard deoxidizer solution storage tank into the condensate, and the condensate water deoxidizer flow detector is used to detect the flow of the standard deoxidizer solution injected into the condensate; The water supply and deoxygenator adding mechanism includes: a second standard deoxygenator solution tank, a water supply and deoxygenator adding frequency conversion pump and a water supply and deoxygenator adding flow detector. The second standard deoxygenator solution tank stores a standard deoxygenator solution. The water supply and deoxygenator adding frequency conversion pump is used to inject the standard deoxygenator solution in the second standard deoxygenator solution storage tank into the water supply. The water supply and deoxygenator adding flow detector is used to detect the flow of the standard deoxygenator solution injected into the water supply.

4. The intelligent control system for water treatment in a power plant according to claim 1, characterized in that: The control module includes: a parameter acquisition unit, a calculation unit and a control unit; The parameter acquisition unit is used to acquire the feed water hydrogen conductivity, the real-time flow rate of condensed water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, the concentration value of the standard ammonia solution, the actual deoxidizer concentration value of feed water and the concentration value of the standard deoxidizer solution; The calculation unit is used to calculate the real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution, and is used to calculate the real-time deoxidizer addition flow value of condensate water and the real-time deoxidizer addition flow value of feed water according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water, and the concentration value of standard deoxidizer solution; The control unit is used to control the ammonia adding device to add standard ammonia solution to the condensate water according to the calculated real-time ammonia adding flow rate value of the condensate water according to the hydrogen conductivity of the feed water, control the ammonia adding device to add standard ammonia solution to the feed water according to the calculated real-time ammonia adding flow rate value of the feed water, control the deoxidizer device to add standard deoxidizer solution to the condensate water according to the calculated real-time deoxidizer adding flow rate value of the condensate water, and control the deoxidizer device to add deoxidizer solution to the feed water according to the calculated real-time deoxidizer adding flow rate value of the feed water.

5. A method for controlling feedwater treatment in a power plant, characterized in that: include: The real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water are calculated according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution; According to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water and the concentration value of standard deoxidizer solution, the real-time flow rate value of condensate water plus deoxidizer and the real-time flow rate value of feed water plus deoxidizer are calculated; According to the hydrogen conductivity of the feed water, the ammonia adding device is controlled to add standard ammonia solution to the condensate output by the condenser according to the real-time ammonia adding flow rate value of the condensate water; the ammonia adding device is controlled to add standard ammonia solution to the feed water generated after the condensate water passes through the low-pressure heater and the deaerator in sequence according to the real-time ammonia adding flow rate value of the feed water; the deoxidizer device is controlled to add standard deoxidizer solution to the condensate output by the condenser according to the real-time deoxidizer adding flow rate value of the condensate water; and the deoxidizer device is controlled to add standard deoxidizer solution to the feed water generated after the condensate water passes through the low-pressure heater and the deaerator in sequence according to the real-time deoxidizer adding flow rate value of the feed water.

6. The power plant feed water treatment control method according to claim 5, characterized in that: The method further comprises: Obtain the hydrogen conductivity of the feed water, the real-time flow rate of the condensed water, the real-time flow rate of the feed water, the actual ammonia concentration value of the feed water, the concentration value of the standard ammonia solution, the actual deoxidizer concentration value of the feed water, and the concentration value of the standard deoxidizer solution.

7. The power plant feed water treatment control method according to claim 6, characterized in that: The method further comprises: The actual ammonia concentration value of the feed water is calculated according to the actual conductivity value of the feed water.

8. The power plant feed water treatment control method according to claim 5, characterized in that: The real-time ammonia addition flow value of condensate water and the real-time ammonia addition flow value of feed water are calculated according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual ammonia concentration value of feed water, and the concentration value of standard ammonia solution, including: Calculating a target ammonia concentration value of the feed water according to a preset pH value range of the feed water; Calculate the difference between the actual ammonia concentration of the feed water and the target ammonia concentration of the feed water to obtain the supplementary value of the ammonia concentration of the feed water; The real-time ammonia addition flow value of condensate water is calculated according to the real-time flow rate of condensate water, the supplementary value of feed water ammonia concentration and the concentration value of standard ammonia solution; The real-time ammonia addition flow value of the water supply is calculated based on the real-time flow rate of the water supply, the ammonia concentration supplement value of the water supply and the concentration value of the standard ammonia solution.

9. The power plant feed water treatment control method according to claim 5, characterized in that: The method of calculating the real-time flow rate of condensate water plus deoxidizer and the real-time flow rate of feed water plus deoxidizer according to the real-time flow rate of condensate water, the real-time flow rate of feed water, the actual deoxidizer concentration value of feed water and the concentration value of the standard deoxidizer solution includes: Calculating a target deoxygenator concentration value for the feed water according to a preset dissolved oxygen concentration range of the feed water; Calculate the difference between the actual deoxidizer concentration value of the feed water and the target deoxidizer concentration value of the feed water to obtain the feed water deoxidizer concentration supplement value; Calculate the real-time deoxidizer flow rate of condensate water according to the real-time flow rate of condensate water, the supplementary value of deoxidizer concentration in feed water and the concentration value of standard ammonia solution; The real-time feed water deoxidizer flow rate value is calculated based on the real-time feed water flow rate, the feed water deoxidizer concentration supplement value and the concentration value of the standard ammonia solution.

10. The power plant feed water treatment control method according to claim 5, characterized in that: The method of controlling the ammonia adding device according to the hydrogen conductivity of the feed water to add a standard ammonia solution to the condensate outputted from the condenser according to the real-time ammonia adding flow value of the condensate, controlling the ammonia adding device to add a standard ammonia solution to the feed water generated after the condensate sequentially passes through the low-pressure heater and the deaerator according to the real-time ammonia adding flow value of the feed water, controlling the deoxidizer device to add a standard deoxidizer solution to the condensate outputted from the condenser according to the real-time deoxidizer adding flow value of the condensate, and controlling the deoxidizer device to add a standard deoxidizer solution to the feed water generated after the condensate sequentially passes through the low-pressure heater and the deoxidizer according to the real-time deoxidizer adding flow value of the feed water, includes: When the hydrogen conductivity of the feed water is less than a first preset value, the ammonia adding device is controlled to add a standard ammonia solution to the condensate outputted from the condenser according to the calculated real-time ammonia adding flow rate value of the condensate water, and it is judged whether the pH value of the feed water generated after the condensate water passes through the low-pressure heater and the deaerator in sequence within a preset time period after the standard ammonia solution is added to the condensate water can be within a preset pH value range; if the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add the standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water; When the hydrogen conductivity of the feed water is greater than or equal to the first preset value and less than the second preset value, the ammonia adding device is controlled to add the standard ammonia solution to the condensate output by the condenser according to the calculated real-time ammonia adding flow rate value of the condensate, and the deoxidizer adding device is controlled to add the standard deoxidizer solution to the condensate according to the calculated real-time deoxidizer adding flow rate value of the condensate, and it is judged whether the pH value of the feed water generated after the condensate passes through the low-pressure heater and the deoxidizer in sequence within the preset time period after the addition of the standard ammonia solution and the standard deoxidizer solution to the condensate is within the preset pH value range and whether the dissolved oxygen concentration value is within the preset dissolved oxygen concentration range; if the pH value of the feed water is not within the preset pH value range, the ammonia adding device is controlled to add the standard ammonia solution to the feed water according to the obtained real-time ammonia adding flow rate value of the feed water; if the dissolved oxygen concentration value of the feed water is not within the preset dissolved oxygen concentration range, the deoxidizer adding device is controlled to add the standard deoxidizer solution to the feed water according to the real-time deoxidizer adding flow rate value of the feed water.

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