Condensate water hydrogen conductivity exceeds standard diagnosis system and method

Abstract

The application relates to the technical field of power plant water quality monitoring, and discloses a condensate water hydrogen conductivity over-standard diagnosis system and method. The condensate water hydrogen conductivity over-standard diagnosis system comprises a sample feeding assembly, a cation exchanger, a degassing device, a conductivity meter, a total organic carbon analyzer and a control system. The hydrogen conductivity value of the condensate water of a generator set before degassing, the degassing hydrogen conductivity value of the condensate water after degassing and the total organic carbon value can be sequentially obtained. Then, whether the condensate water hydrogen conductivity is abnormal is diagnosed according to one or more of the hydrogen conductivity value, the degassing hydrogen conductivity value and the total organic carbon value. When the condensate water hydrogen conductivity is abnormal, the abnormal reason is determined. The condensate water hydrogen conductivity over-standard rapid intelligent diagnosis is realized. The water vapor abnormal diagnosis efficiency and accuracy are greatly improved, and the dependence on the technical ability and experience of technical personnel of a power generation enterprise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power plant water quality monitoring, and in particular to a condensate water hydrogen conductivity over-standard diagnosis system and method. BACKGROUND

[0002] Water vapor hydrogen conductivity over-standard will directly lead to corrosion, fouling and salt accumulation in the thermal system, threatening the safe and stable operation of the unit. For some units that are not equipped with a polishing system or cannot process condensate water at full flow, the deterioration of condensate water will quickly affect the water vapor quality of the entire thermal system.

[0003] At present, most units are frequently started and stopped, and the rapid start and stop of the unit makes it difficult for the vacuum pump to well adapt to the state of rapid switching of the unit, and there may be a situation that the condenser vacuum extraction is not in place, the content of dissolved carbon dioxide in the condensate water increases, the condensate water hydrogen conductivity increases, the heat supply unit has a larger water supply than the non-heat supply unit, and a large amount of organic matter in the desalted water enters the thermal system with the increase of the water supply, resulting in an increase in water vapor hydrogen conductivity. Condenser leakage will also cause condensate water hydrogen conductivity to exceed the standard. When the condenser is obviously leaking, hardness, sodium, silicon and other indicators can be combined to diagnose in addition to hydrogen conductivity. At present, there are few cases of obvious condenser leakage and obvious abnormality of condensate water indicators, and the situation of obvious over-standard of condensate water indicators is also relatively easy to diagnose. Instead, the situation of continuous slight over-standard of condensate water hydrogen conductivity and no obvious abnormality of other indicators is more common and difficult to diagnose. Condenser micro-leakage, carbon dioxide dissolution, increased water supply, and resin failure will all cause slight over-standard of condensate water hydrogen conductivity.

[0004] The prior art can only detect hydrogen conductivity, degassing hydrogen conductivity and total organic carbon content (TOC) individually and combine the experience of technical personnel to make a judgment one by one, and the diagnosis result is not accurate enough. SUMMARY

[0005] Therefore, the present application provides a condensate water hydrogen conductivity over-standard diagnosis system and method to solve or partially solve the technical problem of the inaccurate diagnosis result of the existing condensate water hydrogen conductivity diagnosis scheme.

[0006] The technical scheme of the present application is as follows:

[0007] The first aspect of the present application provides a condensate water hydrogen conductivity over-standard diagnosis system, comprising a sample inlet assembly, a cation exchanger, a degassing device, a conductivity meter, a total organic carbon analyzer and a control system; the sample inlet assembly is connected to the cation exchanger and the total organic carbon analyzer through pipelines respectively, and is used for sampling the condensate water of a generator set and conveying the sampled condensate water to the cation exchanger and the total organic carbon analyzer respectively; the cation exchanger is used for removing cations in the condensate water; the degassing device is connected to the cation exchanger through a pipeline at an inlet end, and is used for degassing the received condensate water; the conductivity meter is connected to the outlet end of the degassing device and the outlet end of the cation exchanger respectively, and is used for detecting the hydrogen conductivity value of the condensate water output by the cation exchanger and the degassed hydrogen conductivity value of the condensate water after degassing by the degassing device; the total organic carbon analyzer is used for detecting the total organic carbon value of the condensate water; the control system is connected to the conductivity meter and the total organic carbon analyzer respectively, and obtains the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value by controlling the operation of the sample inlet assembly, the cation exchanger, the degassing device, the conductivity meter and the total organic carbon analyzer, diagnoses whether the condensate water hydrogen conductivity is abnormal according to one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value, and determines the abnormal reason when the condensate water hydrogen conductivity is abnormal.

[0008] Optionally, the sample inlet assembly comprises a sample inlet pipe, and the condensate water hydrogen conductivity over-standard diagnosis system further comprises a first three-way valve and a second three-way valve; one interface of the first three-way valve is connected to the sample inlet pipe, and the other two interfaces of the first three-way valve are connected to the inlet end of the cation exchanger and the total organic carbon analyzer through pipelines respectively; the three interfaces of the second three-way valve are connected to the outlet end of the cation exchanger, the inlet end of the degassing device and the conductivity meter through pipelines respectively; and the control system is connected to the first three-way valve and the second three-way valve respectively to control the operation states of the first three-way valve and the second three-way valve.

[0009] Optionally, the control system comprises a PLC control cabinet and a computer device; the PLC control cabinet is connected to the first three-way valve, the second three-way valve and the conductivity meter respectively, and is used for controlling the operation states of the first three-way valve and the second three-way valve according to the mode instruction output by the computer device and obtaining the hydrogen conductivity value and the degassed hydrogen conductivity value detected by the conductivity meter; the computer device is connected to the PLC control cabinet and the total organic carbon analyzer respectively, is used for generating a mode switching instruction and sending it to the PLC control cabinet, receiving the hydrogen conductivity value and the degassed hydrogen conductivity value sent by the PLC control cabinet and obtaining the total organic carbon value detected by the total organic carbon analyzer, diagnosing whether the condensate water hydrogen conductivity is abnormal according to one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value, and determining the abnormal reason when the condensate water hydrogen conductivity is abnormal.

[0010] Optionally, the cation exchanger is an electrically automatic regenerated cation exchanger.

[0011] The second aspect of the present application provides a method for diagnosing that the hydrogen conductivity of the condensate water exceeds the standard, which is applied to the system for diagnosing that the hydrogen conductivity of the condensate water exceeds the standard according to any one of the first aspect of the present application, and comprises: generating a first mode instruction, controlling the cation exchanger and the conductivity meter to start running based on the first mode instruction, and making the condensate water pass through the sampling assembly and the cation exchanger in sequence to enter the conductivity meter, and obtaining the hydrogen conductivity value of the condensate water through the conductivity meter; diagnosing whether the hydrogen conductivity of the condensate water has a first abnormality based on the hydrogen conductivity value, if the first abnormality does not occur, the hydrogen conductivity of the condensate water is normal, if the first abnormality occurs, a second mode instruction is generated, and the degassing device is controlled to start running based on the second mode instruction, and the condensate water passes through the sampling assembly, the cation exchanger and the degassing device in sequence to enter the conductivity meter, and the degassed hydrogen conductivity value of the condensate water after being degassed by the degassing device is obtained through the conductivity meter; diagnosing whether the hydrogen conductivity of the condensate water has a second abnormality based on the degassed hydrogen conductivity value, if the second abnormality occurs, it is determined that the abnormality is caused by the condenser leakage, if the second abnormality does not occur, a third mode instruction is generated, and the total organic carbon analyzer is controlled to start running based on the third mode instruction, and the condensate water passes through the sampling assembly to enter the total organic carbon analyzer, and the total organic carbon value of the condensate water is obtained through the total organic carbon analyzer; diagnosing whether the hydrogen conductivity of the condensate water has a third abnormality based on the total organic carbon value, if the third abnormality does not occur, it is determined that the abnormality is caused by the condenser vacuum being not tight, if the third abnormality occurs, it is determined that the abnormality is caused by the high total organic carbon content of the make-up water.

[0012] Optionally, the cation exchanger and the conductivity meter are controlled to start running based on the first mode instruction, and the condensate water passes through the sampling assembly and the cation exchanger in sequence to enter the conductivity meter, and the hydrogen conductivity value of the condensate water is obtained through the conductivity meter, which comprises: sending the first mode instruction to the PLC control cabinet, and controlling the running states of the first three-way valve and the second three-way valve based on the first mode instruction through the PLC control cabinet, so that the condensate water passes through the sampling assembly, the first three-way valve, the cation exchanger and the second three-way valve in sequence to enter the conductivity meter, and the hydrogen conductivity value of the condensate water is obtained through the conductivity meter.

[0013] Optionally, the degassing device is controlled to start running based on the second mode instruction, and the condensate water passes through the sampling assembly, the cation exchanger and the degassing device in sequence to enter the conductivity meter, and the degassed hydrogen conductivity value of the condensate water after being degassed by the degassing device is obtained through the conductivity meter, which comprises: sending the second mode instruction to the PLC control cabinet and controlling the degassing device to start running, and controlling the running states of the first three-way valve and the second three-way valve based on the second mode instruction through the PLC control cabinet, so that the condensate water passes through the sampling assembly, the first three-way valve, the cation exchanger, the degassing device and the second three-way valve in sequence to enter the conductivity meter, and the degassed hydrogen conductivity value of the condensate water after being degassed by the degassing device is obtained through the conductivity meter.

[0014] Optionally, based on the third mode instruction, the total organic carbon analyzer is controlled to start running, the condensed water passes through the sampling assembly to enter the total organic carbon analyzer, and the total organic carbon value of the condensed water is obtained through the total organic carbon analyzer, including: sending the third mode instruction to the PLC control cabinet and controlling the total organic carbon analyzer to start running, controlling the running state of the first three-way valve and the second three-way valve based on the third mode instruction through the PLC control cabinet, so that the condensed water passes through the sampling assembly and the first three-way valve in turn to enter the total organic carbon analyzer, and the total organic carbon value of the condensed water is obtained through the total organic carbon analyzer.

[0015] Optionally, whether the hydrogen conductivity of the condensed water occurs the first abnormality is diagnosed based on the hydrogen conductivity value, including: comparing the sizes of the hydrogen conductivity value, the first set value and the second set value, if the hydrogen conductivity value is less than or equal to the first set value, the second abnormality does not occur, if the hydrogen conductivity value is greater than the first set value and less than or equal to the second set value, the first abnormality occurs; and / or, whether the hydrogen conductivity of the condensed water occurs the second abnormality is diagnosed based on the degassed hydrogen conductivity value, including: comparing the sizes of the degassed hydrogen conductivity value, the third set value and the fourth set value, if the degassed hydrogen conductivity value is less than or equal to the third set value, the second abnormality does not occur, if the hydrogen conductivity value is greater than the third set value and less than or equal to the fourth set value, the second abnormality occurs; and / or, whether the hydrogen conductivity of the condensed water occurs the third abnormality is diagnosed based on the total organic carbon value, including: comparing the sizes of the total organic carbon value and the fifth set value, if the total organic carbon value is less than or equal to the fifth set value, the third abnormality does not occur, if the total organic carbon value is greater than the fifth set value, the third abnormality occurs.

[0016] The third aspect of the present application provides a computer device, including: a memory and a processor, the memory and the processor are connected to each other in communication, the memory stores computer instructions, and the processor executes the computer instructions, thereby the condensed water hydrogen conductivity over standard diagnosis method of any one of the second aspect of the present application.

[0017] From the above technical solutions, the present application has the following advantages:

[0018] The condensed water hydrogen conductivity over standard diagnosis system and method provided by the present application can control the running of the sampling assembly, the cation exchanger, the degassing device, the conductivity meter and the total organic carbon analyzer through the control system, can sequentially obtain the hydrogen conductivity value of the condensed water before degassing, the degassed hydrogen conductivity value of the condensed water after degassing and the total organic carbon value of the condensed water, and can diagnose whether the hydrogen conductivity of the condensed water is abnormal according to one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value, and determine the abnormal reason when the hydrogen conductivity of the condensed water is abnormal, so that the condensed water hydrogen conductivity over standard rapid intelligent diagnosis is realized, the water vapor abnormal diagnosis efficiency and accuracy are greatly improved, and the dependence on the technical ability and experience of the technical personnel of the power generation enterprise is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings needed to be used for describing the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 The structural schematic diagram of the condensate water hydrogen conductivity over-standard diagnosis system in the embodiment of the present application is shown in the figure.

[0021] Figure 2 The flow chart of the condensate water hydrogen conductivity over-standard diagnosis system method in the embodiment of the present application is shown in the figure.

[0022] Figure 3 The structural schematic diagram of the computer device in the embodiment of the present application is shown in the figure.

[0023] Reference signs:

[0024] 1-inlet tube, 2-first three-way valve, 3-first pipeline, 4-fourth pipeline, 5-cation exchanger, 6-second pipeline, 7-second three-way valve, 8-third pipeline, 9-fifth pipeline, 10-degassing device, 11-sixth pipeline, 12-conductivity meter, 13-control cabinet, 14-computer device, 15-total organic carbon analyzer. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements, it can be wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict between them.

[0029] At present, for the abnormal working condition of the condensate water hydrogen removal electric conductivity trace exceeding (less than or equal to 1 μS / cm), other indicators have no obvious abnormalities, the previous judgment mode detects single indicators such as hydrogen conductivity, degassing hydrogen conductivity and total organic carbon content and judges one by one combined with the experience of technical personnel, which has the problems of being not comprehensive, being unreliable, being highly dependent on the experience of technical personnel, being long in diagnosis period and the like. And the current large combustion engine power generation enterprises have the problems of fast failure of online hydrogen conductivity meter, low degassing hydrogen conductivity equipment rate and lack of total organic carbon content detection capability.

[0030] Therefore, the embodiment of the present application provides a condensate water hydrogen conductivity exceeding diagnosis system and method, which is mainly suitable for fault diagnosis of a condenser of a thermal power generating unit with large and unstable heat supply water supply amount in the running stage, and is especially suitable for abnormal diagnosis of condensate water hydrogen removal electric conductivity trace exceeding. For example, the condensate water online hydrogen conductivity of a certain thermal power plant slightly exceeds, and fluctuates greatly. The thermal power plant is a heat supply unit, the heat supply amount is large, and the raw water quality is unstable, the online hydrogen conductivity meter often fails, and the online sodium standard qualified rate is low and cannot be referred. During daily operation, the online hydrogen conductivity slightly exceeds, but the hardness and silicon have no obvious change, it is basically impossible to judge the reason for the slight hydrogen conductivity exceeding, the power plant has no related professional equipment, and lacks experienced professional technicians, and the total organic carbon content is sent out for detection in the later period, and the real abnormal reason cannot be diagnosed in time. The unit is operated with disease for a long time, and the low-pressure rotor blade corrosion is found to be serious during the overhaul of the cylinder, the plant urgently needs a condensate water hydrogen conductivity exceeding diagnosis system as in the present application.

[0031] The condensate hydrogen conductivity over-standard diagnosis system and method can help the thermal power generation enterprise to quickly diagnose the specific reason of the condensate abnormality, the whole diagnosis process is less than 5 minutes, and the system module is automatically put into operation or withdrawn according to the diagnosis requirement, so that the automatic, efficient, accurate, reliable and energy-saving remote intelligent diagnosis mode is realized, the related professional can quickly respond to the treatment according to the diagnosis conclusion and suggestion, even if the technical personnel do not have rich field experience, the condensate hydrogen conductivity over-standard problem can also be quickly and accurately handled, the unqualified condensate entering the thermal system can be greatly reduced, the probability of a major equipment accident caused by corrosion and fouling is reduced, and the safe and stable operation of the equipment is ensured.

[0032] As shown in Figure 1 The condensate hydrogen conductivity over-standard diagnosis system provided by the embodiment of the present application comprises a sampling assembly, a cation exchanger 5, a degassing device 10, a conductivity meter 12, a total organic carbon analyzer 15 and a control system. The sampling assembly is connected with the cation exchanger 5 and the total organic carbon analyzer 15 through pipelines respectively, is used for sampling the condensate of a power generating unit, and sends the sampled condensate to the cation exchanger 5 and the total organic carbon analyzer 15 respectively. The cation exchanger 5 is used for removing cations in the condensate. The degassing device 10 is connected with the cation exchanger 5 through a pipeline at an inlet end, and is used for degassing the received condensate. The conductivity meter 12 is connected with the outlet end of the degassing device 10 and the outlet end of the cation exchanger 5 respectively, and is used for detecting the hydrogen conductivity value of the condensate output by the cation exchanger 5 and the degassed hydrogen conductivity value of the condensate degassed by the degassing device 10. The total organic carbon analyzer 15 is used for detecting the total organic carbon value of the condensate. The control system is connected with the conductivity meter 12 and the total organic carbon analyzer 15 respectively, acquires the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value by controlling the operation of the sampling assembly, the cation exchanger 5, the degassing device 10, the conductivity meter 12 and the total organic carbon analyzer 15, diagnoses whether the condensate hydrogen conductivity is abnormal according to one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value, and determines the abnormal reason when the condensate hydrogen conductivity is abnormal.

[0033] Specifically, the degassing device 10 can use any one of the boiling method, the vacuum method or the nitrogen purging method for degassing.

[0034] The conductivity meter 12 adopts an online meter, which is convenient for the control system to collect data and control. The conductivity meter 12 comprises an electrode and a meter head, and can measure the online conductivity when used alone. After the condensate enters the cation exchanger 5, there are two output routes. One output route directly enters the conductivity meter 12, and the hydrogen conductivity value is obtained by measuring the conductivity meter 12. The other output route enters the conductivity meter 12 after being degassed by the degassing device 10, and the degassed hydrogen conductivity value is obtained by measuring the conductivity meter 12. The two output routes of the cation exchanger 5 can be switched by the output instruction of the control system.

[0035] The total organic carbon analyzer 15 adopts an online meter, facilitating the control system to collect data and control. The total organic carbon analyzer 15 can detect the total organic carbon value of the condensed water and send it to the control system.

[0036] The operation of the sampling assembly, the cation exchanger 5, the degassing device 10, the conductivity meter 12 and the total organic carbon analyzer 15 has three modes to obtain the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value respectively. Specifically, in the first mode, the control system controls the condensed water sampled by the sampling assembly to enter the conductivity meter 12 directly after entering the cation exchanger 5, to detect the hydrogen conductivity value.

[0037] In the second mode, the control system controls the condensed water sampled by the sampling assembly to enter the degassing device 10 for degassing after entering the cation exchanger 5, and then enter the conductivity meter 12 to detect the degassed hydrogen conductivity value. In the first mode, the control system controls the condensed water sampled by the sampling assembly to enter the total organic carbon analyzer 15 to detect the total organic carbon value.

[0038] The control system diagnoses whether the hydrogen conductivity of the condensed water is abnormal according to one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value, and determines the abnormal reason when the hydrogen conductivity of the condensed water is abnormal.

[0039] In an example, the control system includes a computer, and the final processing result can be output on the computer display screen. The corresponding processing suggestion can also be given according to the abnormal reason, to realize fast and intelligent diagnosis of the hydrogen conductivity exceeding the standard of the condensed water.

[0040] The control system can also be combined with online intelligent diagnosis technology of water and steam indicators such as hydrogen conductivity exceeding the standard of the feed water, hydrogen conductivity exceeding the standard of the steam, and abnormal water quality of the boiler water. Meanwhile, the control system can realize intelligent feed water and boiler water chemical addition adjustment through the diagnosis result, to further improve the efficiency and accuracy of the water and steam indicator abnormal diagnosis and adjust the water treatment chemical addition.

[0041] The condensed water hydrogen conductivity exceeding the standard diagnosis system of the embodiment of the application can obtain the hydrogen conductivity value of the condensed water of the generator set before degassing, the degassed hydrogen conductivity value of the condensed water after degassing and the total organic carbon value in sequence through the control system controlling the operation of the sampling assembly, the cation exchanger 5, the degassing device 10, the conductivity meter 12 and the total organic carbon analyzer 15. Then, the control system diagnoses whether the hydrogen conductivity of the condensed water is abnormal according to one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value and the total organic carbon value, and determines the abnormal reason when the hydrogen conductivity of the condensed water is abnormal. Thus, the control system realizes fast and intelligent diagnosis of the hydrogen conductivity exceeding the standard of the condensed water, greatly improves the efficiency and accuracy of the water and steam abnormal diagnosis, and reduces the dependence on the technical ability and experience of the technical personnel of the power generation enterprise.

[0042] In some embodiments, the sample feeding assembly comprises a sample feeding pipe 1, and the condensed water hydrogen conductivity over-standard diagnosis system further comprises a first three-way valve 2 and a second three-way valve 7; one interface of the first three-way valve 2 is connected with the sample feeding pipe 1, and the other two interfaces of the first three-way valve 2 are connected with the inlet end of the cation exchanger 5 and the total organic carbon analysis meter 15 through pipes respectively; the three interfaces of the second three-way valve 7 are connected with the outlet end of the cation exchanger 5, the inlet end of the degassing device 10 and the conductivity meter 12 through pipes respectively; and the control system is connected with the first three-way valve 2 and the second three-way valve 7 respectively to control the operating states of the first three-way valve 2 and the second three-way valve 7.

[0043] Further, the control system comprises a PLC control cabinet 13 and a computer device 14; the PLC control cabinet 13 is connected with the first three-way valve 2, the second three-way valve 7 and the conductivity meter 12 respectively to control the operating states of the first three-way valve 2 and the second three-way valve 7 according to the mode instructions output by the computer device 14, and to obtain the hydrogen conductivity values detected by the conductivity meter 12 and the degassed hydrogen conductivity values; the computer device 14 is connected with the PLC control cabinet 13 and the total organic carbon analysis meter 15 respectively to generate mode switching instructions and send them to the PLC control cabinet 13, to receive the hydrogen conductivity values and the degassed hydrogen conductivity values sent by the PLC control cabinet 13 and to obtain the total organic carbon values detected by the total organic carbon analysis meter 15, to diagnose whether the condensed water hydrogen conductivity is abnormal according to one or more of the hydrogen conductivity values, the degassed hydrogen conductivity values and the total organic carbon values, and to determine the abnormal reasons when the condensed water hydrogen conductivity is abnormal.

[0044] Specifically, the first three-way valve 2 and the second three-way valve 7 are both electromagnetic three-way valves.

[0045] By setting the first three-way valve 2 and the second three-way valve 7, the hydrogen conductivity values of the condensed water can be detected by the conductivity meter 12 first, and when the condensed water hydrogen conductivity values are diagnosed to be normal, the degassing device 10 and the total organic carbon analysis meter 15 are automatically out of operation. When the condensed water hydrogen conductivity values are over-standard, the degassing device 10 is automatically started and the degassed hydrogen conductivity values are detected by the conductivity meter 12. Further, the hydrogen conductivity values and the degassed hydrogen conductivity values are combined to make a judgment, such as diagnosing the leakage reasons such as condenser leakage, and then the total organic carbon analysis meter 15 is not started, or if the reasons are not diagnosed, the total organic carbon analysis meter 15 is started by controlling the first three-way valve 2 and the second three-way valve 7 to make a final diagnosis. If only condenser micro-permeation occurs, it can be determined within 3 minutes or so, and the whole diagnosis system is fully automatic, which has the effects of intelligence, high efficiency and energy saving.

[0046] In some embodiments, the cation exchanger 5 is an electrically automatic regenerating cation exchanger 5.

[0047] Compared with the ion exchange resin used by the ordinary online hydrogen conductivity meter, the electric automatic regeneration cation exchanger 5 can continuously remove cations, automatically regenerate and never fail, and avoid the frequent failure of the hydrogen conductivity ion exchange resin affecting the diagnosis.

[0048] The embodiment of the present application also provides a condensed water hydrogen conductivity over-standard diagnosis method, which is applied to the condensed water hydrogen conductivity over-standard diagnosis system in the above embodiment, as shown in the figure, the method comprises the following steps: Figure 2

[0049] In step S201, a first mode instruction is generated, and the cation exchanger 5 and the conductivity meter 12 are controlled to start running based on the first mode instruction, the condensed water passes through the sampling assembly and the cation exchanger 5 in turn and enters the conductivity meter 12, and the hydrogen conductivity value of the condensed water is obtained through the conductivity meter 12.

[0050] Specifically, the first mode instruction is sent to the PLC control cabinet 13, the running state of the first three-way valve 2 and the second three-way valve 7 is controlled by the PLC control cabinet 13 based on the first mode instruction, the condensed water passes through the sampling assembly, the first three-way valve 2, the cation exchanger 5 and the second three-way valve 7 in turn and enters the conductivity meter 12, and the hydrogen conductivity value of the condensed water is obtained through the conductivity meter 12.

[0051] In step S202, whether the condensed water hydrogen conductivity has a first abnormality is diagnosed based on the hydrogen conductivity value, if the first abnormality does not occur, the condensed water hydrogen conductivity is normal, if the first abnormality occurs, a second mode instruction is generated, the degassing device 10 is controlled to start running based on the second mode instruction, the condensed water passes through the sampling assembly, the cation exchanger 5 and the degassing device 10 in turn and enters the conductivity meter 12, and the degassed hydrogen conductivity value of the condensed water after being degassed by the degassing device 10 is obtained through the conductivity meter 12.

[0052] Specifically, the sizes of the hydrogen conductivity value, the first set value and the second set value are compared, if the hydrogen conductivity value is less than or equal to the first set value, the second abnormality does not occur, if the hydrogen conductivity value is greater than the first set value and less than or equal to the second set value, the first abnormality occurs.

[0053] The second mode instruction is sent to the PLC control cabinet 13 and the degassing device 10 is controlled to start running, the running state of the first three-way valve 2 and the second three-way valve 7 is controlled by the PLC control cabinet 13 based on the second mode instruction, the condensed water passes through the sampling assembly, the first three-way valve 2, the cation exchanger 5, the degassing device 10 and the second three-way valve 7 in turn and enters the conductivity meter 12, and the degassed hydrogen conductivity value of the condensed water after being degassed by the degassing device 10 is obtained through the conductivity meter 12.

[0054] ​Step S203, based on the degassing hydrogen conductivity value to diagnose whether the condensate hydrogen conductivity occurs the second abnormal, if the second abnormal occurs, determine the cause of the abnormal condenser leakage, if not the second abnormal occurs, generate the third mode instruction, based on the third mode instruction control total organic carbon analyzer 15 start running, condensate through the sample assembly into the total organic carbon analyzer 15, through the total organic carbon analyzer 15 to obtain the total organic carbon value of condensate.

[0055] Specifically, the size of the degassing hydrogen conductivity value, the third set value and the fourth set value are compared, if the degassing hydrogen conductivity value is less than or equal to the third set value, the second abnormal does not occur, if the hydrogen conductivity value is greater than the third set value and less than or equal to the fourth set value, the second abnormal occurs.

[0056] The third mode instruction is sent to the PLC control cabinet 13 and controls the total organic carbon analyzer 15 to start running, and the running state of the first three-way valve 2 and the second three-way valve 7 is controlled by the PLC control cabinet 13 based on the third mode instruction, so that the condensate passes through the sample assembly and the first three-way valve 2 into the total organic carbon analyzer 15 in turn, and the total organic carbon value of the condensate is obtained through the total organic carbon analyzer 15.

[0057] Step S204, based on the total organic carbon value to diagnose whether the condensate hydrogen conductivity occurs the third abnormal, if not the third abnormal occurs, determine the cause of the abnormal condenser vacuum is not strict, if the third abnormal occurs, determine the cause of the abnormal water total organic carbon content is high.

[0058] Specifically, the size of the total organic carbon value and the fifth set value are compared, if the total organic carbon value is less than or equal to the fifth set value, the third abnormal does not occur, if the total organic carbon value is greater than the fifth set value, the third abnormal occurs.

[0059] Further, when the cause of the abnormal is condenser vacuum not strict or condenser leakage and other condenser failures, the computer equipment 14 outputs an alarm signal, and the fault cause and treatment suggestion are presented on the computer equipment 14 display screen, all technical personnel and management personnel of the power generation enterprise can remotely view through data access. If the condenser leaks or the condenser vacuum is not strict, the turbine personnel can directly view the determination result and process it, without the need for chemical personnel to take samples for testing multiple times, and some still need to be detected externally, and then combined with online and offline data for manual judgment.

[0060] In an example, the first set value is 0.3 μS / cm, the second set value is 1 μS / cm, the third set value is 0.3 μS / cm, the fourth set value is 1 μS / cm, and the fifth set value is 400 / (N×100), wherein N is the water supply rate, which can be accessed from the water supply rate data of the power generation enterprise production monitoring platform. The condensate hydrogen conductivity exceeding diagnosis method is described in detail below.

[0061] The first step, adjust the first three-way valve 2, make the condensate water sample first through the sample tube 1, flow through the first three-way valve 2 and the first pipeline 3 into the cation ion exchanger 5, after removing the cation, from the second pipeline 6, through the second three-way valve 7 adjustment, through the third pipeline 8 into the conductivity meter 12, the measured conductivity data is transmitted to the computer equipment 14 through the PLC control cabinet 13, after the software system logical judgment, the diagnostic results are displayed on the display screen of the computer equipment 14. At this time, the data measured by the conductivity meter 12 is the hydrogen conductivity value CC of the condensate water, if the hydrogen conductivity value CC is less than or equal to 0.3 μS / cm, it is diagnosed as normal operation, the condensate water does not pass through the fourth pipeline 4 and the fifth pipeline 9, the degassing device 10 and the total organic carbon analyzer 15 are not put into operation.

[0062] The second step, if the hydrogen conductivity value CC is greater than 0.3 μS / cm and less than or equal to 1 μS / cm, the PLC control cabinet 13 controls the second three-way valve 7, the third pipeline 8 is closed, the water sample from the cation ion exchanger 5 flows into the degassing device 10 through the fifth pipeline 9, at this time, the degassing device 10 is automatically put into operation, the degassing device 10 can use the boiling method or the vacuum method or the nitrogen blowing method for degassing, the degassed water sample enters the conductivity meter 12 through the sixth pipeline 11, at this time, the data measured by the conductivity meter 12 is the degassed hydrogen conductivity value DCC of the condensate water, the measured conductivity data is transmitted to the computer equipment 14 through the PLC control cabinet 13, if 0.3 μS / cm < DCC ≤ 1 μS / cm, the computer equipment 14 will determine that the condenser leaks and display the diagnostic results on the display, the power plant turbine professional carries out online leakage detection and plugging according to the results. At this time, the total organic carbon analyzer 15 remains in the state of not being put into operation.

[0063] The third step, if the hydrogen conductivity value CC is greater than 0.3 μS / cm and less than 1 μS / cm, the degassed hydrogen conductivity value DCC is less than or equal to 0.3 μS / cm, the PLC control cabinet 13 will control the first three-way valve 2 to act, so that the condensate water enters the total organic carbon analyzer 15 through the first three-way valve 2 and the fourth pipeline 4, at this time, the total organic carbon analyzer 15 is automatically put into operation, if TOC ≤ 400 / (N×100) at this time, the computer equipment 14 diagnoses that the condenser vacuum is not tight and displays the diagnostic results on the display, the turbine professional can process the condenser according to the diagnostic results.

[0064] In the fourth step, if the hydrogen conductivity value CC is greater than 0.3 μS / cm and less than 1 μS / cm, and the degassed hydrogen conductivity value DCC is less than or equal to 0.3 μS / cm, the PLC control cabinet 13 controls the first three-way valve 2 to act, so that the condensed water enters the total organic carbon analyzer 15 through the first three-way valve 2 and the fourth pipeline 4. At this time, the total organic carbon analyzer 15 is automatically put into operation. If the TOC is greater than 400 / (N*100) at this time, the computer equipment 14 diagnoses that the total organic carbon content of the make-up water is high, and the chemical professional adjusts the water treatment according to the diagnosis result to reduce the introduction of organic matter.

[0065] The above equipment is automatically operated. The staff can read the diagnosis result of the condensed water hydrogen conductivity abnormality from the computer equipment 14 within 5 minutes and make corresponding processing, which greatly shortens the diagnosis time and manual troubleshooting risk and avoids a large amount of deteriorated water entering the thermal system to cause corrosion, scaling and salt accumulation of the blade and four pipes and other thermal equipment.

[0066] The condensed water hydrogen conductivity over-standard diagnosis method can help the thermal power generation enterprise to quickly and accurately diagnose the specific reason for the condensed water abnormality. The relevant professional can quickly respond to the processing according to the diagnosis conclusion and suggestion. Even if the technical personnel do not have rich field experience, they can also quickly and accurately handle the problem of the condensed water hydrogen conductivity over-standard. The water vapor abnormality diagnosis efficiency and accuracy are greatly improved, and the dependence on the technical ability and experience of the technical personnel of the power generation enterprise is reduced.

[0067] The condensed water hydrogen conductivity over-standard diagnosis method first detects the hydrogen conductivity value of the condensed water through the conductivity meter 12. When the hydrogen conductivity value of the condensed water is diagnosed to be normal, the degassing device 10 and the total organic carbon analyzer 15 automatically exit operation. When the hydrogen conductivity value of the condensed water is over-standard, the degassing device 10 is automatically started and the degassed hydrogen conductivity value is detected through the conductivity meter 12. The hydrogen conductivity value and the degassed hydrogen conductivity value are further judged in combination. If the leakage reason such as the condenser leakage is diagnosed, the total organic carbon analyzer 15 is not started. If the reason is not diagnosed, the total organic carbon analyzer 15 is put into operation through the control of the first three-way valve 2 and the second three-way valve 7 for final diagnosis. If only the condenser micro-permeation occurs, it can be determined within 3 minutes. The entire diagnosis system is automatically operated, and the degassing device 10 and the total organic carbon analyzer 15 do not need to be operated every time. The system has the effects of intelligence, high efficiency and energy saving.

[0068] The condensed water hydrogen conductivity over-standard diagnosis method can greatly reduce the unqualified condensed water entering the thermal system, reduce the probability of major equipment accidents caused by corrosion and scaling, and ensure the safe and stable operation of the equipment.

[0069] In summary, this invention provides a novel, practical, sensitive, and reliable diagnostic system and method for excessive hydrogen conductivity in condensate, providing strong protection for the safe operation of thermal power plants.

[0070] It should be noted that the implementation of this invention is not limited to thermal power generating units. It can be widely applied to situations where the hydrogen conductivity of condensate in gas turbines or coal-fired power plants is slightly excessive, providing strong support for improving the safety and stability of power generation equipment.

[0071] The present invention also provides a computer device 14, such as Figure 3 As shown, the computer device 14 includes one or more processors, memory, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processor can process instructions executed within the computer device 14, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices 14 can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 3 Let's take a processor as an example.

[0072] The processor can be a central processing unit, a network processor, or a combination thereof. The processor may further include hardware chips. These hardware chips can be application-specific integrated circuits (ASICs), programmable logic devices (PLDs), or combinations thereof. The programmable logic devices can be complex programmable logic devices (CLPs), field-programmable gate arrays (FPGAs), general-purpose array logic (GDAs), or any combination thereof.

[0073] The memory stores instructions executable by at least one processor to cause the at least one processor to perform the method shown in the above embodiments.

[0074] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device 14. Furthermore, the memory may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory may include memory remotely located relative to the processor, which can be connected to the computer device 14 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0075] The memory may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory may also include a combination of the above types of memory.

[0076] The computer device 14 also includes input and output devices. The processor, memory, input and output devices can be connected via a bus or other means. Figure 3 Taking the example of a connection between China and Israel via a bus.

[0077] The input device can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device 14, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. The output device may include a display device, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0078] While exemplary embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions and modifications to these embodiments without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined herein.

Claims

1. A diagnostic system for excessive hydrogen conductivity in condensed water, characterized in that, It includes a sample introduction assembly, a cation exchanger, a degassing device, a conductivity meter, a total organic carbon analyzer, and a control system; The sampling assembly is connected to the cation exchanger and the total organic carbon analyzer via pipelines, and is used to sample the condensate of the generator set and deliver the sampled condensate to the cation exchanger and the total organic carbon analyzer, respectively. The cation exchanger is used to remove cations from condensate; The degassing device has its inlet end connected to the cation exchanger via a pipe, and is used to degas the received condensate. A conductivity meter is connected to the outlet end of the degassing device and the outlet end of the cation exchanger, respectively, to detect the hydrogen conductivity value of the condensate output by the cation exchanger and the degassed hydrogen conductivity value of the condensate after degassing by the degassing device. The total organic carbon analysis table is used to detect the total organic carbon value of condensate. The control system is connected to the conductivity meter and the total organic carbon analyzer, respectively. By controlling the operation of the sample injection assembly, the cation exchanger, the degassing device, the conductivity meter, and the total organic carbon analyzer, it acquires the hydrogen conductivity value, the degassing hydrogen conductivity value, and the total organic carbon value. Based on one or more of these values, it diagnoses whether the hydrogen conductivity of the condensate is abnormal, and determines the cause of any abnormality when abnormal hydrogen conductivity is detected. The control system is used for: A first mode command is generated, and based on the first mode command, the cation exchanger and conductivity meter are controlled to start running. The condensate sequentially passes through the sample introduction component and the cation exchanger and enters the conductivity meter. The hydrogen conductivity value of the condensate is obtained through the conductivity meter. Based on the hydrogen conductivity value, it is diagnosed whether the hydrogen conductivity of the condensate has a first abnormality. If the first abnormality does not occur, the hydrogen conductivity of the condensate is normal. If the first abnormality occurs, a second mode command is generated. Based on the second mode command, the degassing device is controlled to start running. The condensate passes through the sample injection component, the cation exchanger and the degassing device in sequence and enters the conductivity meter. The degassing hydrogen conductivity value of the condensate after being degassed by the degassing device is obtained through the conductivity meter. Based on the degassed hydrogen conductivity value, diagnose whether a second anomaly has occurred in the condensate hydrogen conductivity. If a second anomaly occurs, determine that the cause of the anomaly is a condenser leak. If no second anomaly occurs, generate a third mode command. Based on the third mode command, control the total organic carbon analyzer to start running. Condensate enters the total organic carbon analyzer through the sample injection component. Obtain the total organic carbon value of the condensate through the total organic carbon analyzer. Based on the total organic carbon value, diagnose whether a third abnormality has occurred in the hydrogen conductivity of the condensate. If no third abnormality occurs, the cause of the abnormality is determined to be poor condenser vacuum. If a third abnormality occurs, the cause of the abnormality is determined to be high total organic carbon content in the makeup water.

2. The condensate hydrogen conductivity exceeding standard diagnostic system according to claim 1, characterized in that, The sample injection assembly includes a sample injection tube, and the condensate hydrogen conductivity exceeding standard diagnostic system also includes a first three-way valve and a second three-way valve; One port of the first three-way valve is connected to the sample inlet tube, and the other two ports of the first three-way valve are connected to the inlet of the cation exchanger and the total organic carbon analyzer through pipes, respectively. The three ports of the second three-way valve are respectively connected to the outlet of the cation exchanger, the inlet of the degassing device, and the conductivity meter through pipes; The control system is connected to the first three-way valve and the second three-way valve respectively to control the operating status of the first three-way valve and the second three-way valve.

3. The condensate hydrogen conductivity exceeding standard diagnostic system according to claim 2, characterized in that, The control system includes a PLC control cabinet and computer equipment; The PLC control cabinet is connected to the first three-way valve, the second three-way valve and the conductivity meter respectively, and is used to control the operating status of the first three-way valve and the second three-way valve according to the mode instructions output by the computer equipment and to obtain the hydrogen conductivity value and the degassed hydrogen conductivity value detected by the conductivity meter. The computer equipment is connected to the PLC control cabinet and the total organic carbon analyzer, respectively. It is used to generate mode switching instructions and send them to the PLC control cabinet, receive the hydrogen conductivity value and the degassed hydrogen conductivity value sent by the PLC control cabinet, and obtain the total organic carbon value detected by the total organic carbon analyzer. It diagnoses whether the hydrogen conductivity of condensate is abnormal based on one or more of the hydrogen conductivity value, the degassed hydrogen conductivity value, and the total organic carbon value, and determines the cause of the abnormality when the hydrogen conductivity of condensate is abnormal.

4. The condensate hydrogen conductivity exceeding standard diagnostic system according to claim 1, characterized in that, The cation exchanger is an electrically automatic regenerating cation exchanger.

5. A method for diagnosing excessive hydrogen conductivity in condensate, applied to the condensate hydrogen conductivity exceeding the standard diagnostic system as described in any one of claims 1 to 4, characterized in that, include: A first mode command is generated, and based on the first mode command, the cation exchanger and conductivity meter are controlled to start running. The condensate sequentially passes through the sample introduction component and the cation exchanger and enters the conductivity meter. The hydrogen conductivity value of the condensate is obtained through the conductivity meter. Based on the hydrogen conductivity value, it is diagnosed whether the hydrogen conductivity of the condensate has a first abnormality. If the first abnormality does not occur, the hydrogen conductivity of the condensate is normal. If the first abnormality occurs, a second mode command is generated. Based on the second mode command, the degassing device is controlled to start running. The condensate passes through the sample injection component, the cation exchanger and the degassing device in sequence and enters the conductivity meter. The degassing hydrogen conductivity value of the condensate after being degassed by the degassing device is obtained through the conductivity meter. Based on the degassed hydrogen conductivity value, diagnose whether a second anomaly has occurred in the condensate hydrogen conductivity. If a second anomaly occurs, determine that the cause of the anomaly is a condenser leak. If no second anomaly occurs, generate a third mode command. Based on the third mode command, control the total organic carbon analyzer to start running. Condensate enters the total organic carbon analyzer through the sample injection component. Obtain the total organic carbon value of the condensate through the total organic carbon analyzer. Based on the total organic carbon value, diagnose whether a third abnormality has occurred in the hydrogen conductivity of the condensate. If no third abnormality occurs, the cause of the abnormality is determined to be poor condenser vacuum. If a third abnormality occurs, the cause of the abnormality is determined to be high total organic carbon content in the makeup water.

6. The diagnostic method for excessive hydrogen conductivity in condensate according to claim 5, characterized in that, Based on the first mode command, the cation exchanger and conductivity meter are started to operate. Condensate sequentially passes through the sample introduction assembly and the cation exchanger before entering the conductivity meter. The hydrogen conductivity value of the condensate is obtained through the conductivity meter, including: The first mode command is sent to the PLC control cabinet, which controls the operation of the first three-way valve and the second three-way valve based on the first mode command. The condensate then passes through the sample injection component, the first three-way valve, the cation exchanger, and the second three-way valve in sequence before entering the conductivity meter. The hydrogen conductivity value of the condensate is obtained through the conductivity meter.

7. The diagnostic method for excessive hydrogen conductivity in condensed water according to claim 5, characterized in that, Based on the second mode command, the degassing device is started to operate. Condensate sequentially passes through the sample introduction component, the cation exchanger, and the degassing device before entering the conductivity meter. The conductivity meter is used to obtain the degassed hydrogen conductivity value of the condensate after degassing by the degassing device, including: The second mode command is sent to the PLC control cabinet and the degassing device is started to operate. The PLC control cabinet controls the operation status of the first three-way valve and the second three-way valve based on the second mode command, so that the condensate passes through the sample injection component, the first three-way valve, the cation exchanger, the degassing device and the second three-way valve in sequence and enters the conductivity meter. The degassing hydrogen conductivity value of the condensate after being degassed by the degassing device is obtained through the conductivity meter.

8. The method for diagnosing excessive hydrogen conductivity in condensate according to claim 5, characterized in that, Based on the third mode command, the total organic carbon analyzer starts operating. Condensate enters the total organic carbon analyzer through the sample introduction component. The total organic carbon value of the condensate is obtained through the total organic carbon analyzer, including: The third mode command is sent to the PLC control cabinet and the total organic carbon analyzer is started to run. The PLC control cabinet controls the operation of the first three-way valve and the second three-way valve based on the third mode command, so that the condensate passes through the sample injection component and the first three-way valve in sequence and enters the total organic carbon analyzer. The total organic carbon value of the condensate is obtained through the total organic carbon analyzer.

9. The method for diagnosing excessive hydrogen conductivity in condensate according to claim 5, characterized in that, Diagnosing whether the hydrogen conductivity of condensate has a first abnormality based on the aforementioned hydrogen conductivity value includes: Compare the hydrogen conductivity value, the first set value, and the second set value. If the hydrogen conductivity value is less than or equal to the first set value, no second abnormality occurs. If the hydrogen conductivity value is greater than the first set value and less than or equal to the second set value, a first abnormality occurs. And / or, based on the degassed hydrogen conductivity value, diagnose whether a second anomaly has occurred in the condensate hydrogen conductivity, including: Compare the degassed hydrogen conductivity value, the third set value, and the fourth set value. If the degassed hydrogen conductivity value is less than or equal to the third set value, the second abnormality will not occur. If the hydrogen conductivity value is greater than the third set value and less than or equal to the fourth set value, the second abnormality will occur. And / or, based on the total organic carbon value, diagnose whether a third anomaly has occurred in the hydrogen conductivity of condensate, including: The total organic carbon value is compared with the fifth set value. If the total organic carbon value is less than or equal to the fifth set value, the third anomaly does not occur. If the total organic carbon value is greater than the fifth set value, the third anomaly occurs.

10. A computer device, characterized in that, include: The system includes a memory and a processor, which are interconnected and communicate with each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the condensate hydrogen conductivity exceeding standard diagnostic method according to any one of claims 5 to 9.

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