Optimization treatment device for internal cooling water of generator

Abstract

The utility model discloses an optimization treatment device for internal cooling water of a generator. The device comprises a water mixing unit, an electric flow regulation and control pipeline, a water replenishing sampling detection unit, an internal cooling water tank, an internal cooling water tank water inlet pipeline, a stator cooling water pump, an effluent sampling detection unit and a control system. Two sampling detection points of the water outlet sampling detection unit and the water supply sampling detection unit are arranged to detect the water supply conductivity value and the water outlet conductivity value of the inner cooling water tank correspondingly, so that the control system controls the inner cooling water tank according to the water supply conductivity value, the water outlet conductivity value and the inner cooling water target control value set by a user. And the water mixing valve and the electric control valve are controlled to have matched opening degrees, so that the conductivity and the pH value of the cold water in the generator are adjusted.

Description

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 2, 2024, with application number 202420252435.4, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of generator internal cooling water treatment, and in particular to a generator internal cooling water optimization treatment device. Background Art

[0003] With the widespread use of large-scale generator sets, the fouling of the generator sets and the changes in parameters and capacity caused by the substandard water quality of the cooling water inside the generators have made the copper corrosion rate and deposition phenomenon in the circulation part of the generator rotors more and more serious. Therefore, the chemical water treatment method of the cooling water system inside the generators directly affects the safe operation of the generator sets.

[0004] According to relevant standards, the copper corrosion rate of the internal cooling water can be effectively suppressed by controlling the pH value of the cooling water in the generator, and according to relevant empirical formulas, the pH value of the cooling water in the generator is logarithmically positively correlated with the conductivity value, that is, as the conductivity increases, the pH value will also increase. Therefore, according to this relationship, in the prior art, the pH value of the internal cooling water is controlled by controlling its conductivity, thereby achieving effective suppression of the copper corrosion rate of the internal cooling water. In the related technical scheme, a mixed water of two incoming waters, condensate polishing water with ammonia and condensate polishing water without ammonia, is introduced as the internal cooling water replenishment water of the generator, and the conductivity value of the replenishment water is monitored, and then the valve opening of the water pipeline is adjusted according to the monitored conductivity value to adjust the mixing ratio of the two incoming waters, thereby achieving the control of the conductivity and pH of the cooling water in the generator, thereby achieving the purpose of suppressing the copper corrosion rate of the internal cooling water.

[0005] However, due to the large volume of the internal cooling water tank and the long distance of the pipeline from the outlet of the internal cooling water tank to the generator and then back to the inlet of the internal cooling water tank, the above technical scheme often takes a long time to make the conductivity value and pH value at the inlet of the internal cooling water tank and the conductivity value and pH value inside the internal cooling water tank consistent, and in actual working conditions, the conductivity value and pH value at the inlet of the internal cooling water tank are often higher than the conductivity value and pH value inside the internal cooling water tank. Therefore, it will cause large control fluctuations and long system regulation period when adjusting the pH and conductivity of the cooling water in the generator, that is, it is difficult to achieve rapid and precise control of the pH and conductivity of the cooling water in the generator. Utility Model Content

[0006] The embodiment of the utility model provides a device for optimizing the treatment of cooling water inside a generator, so as to achieve faster and more accurate control of the pH and conductivity of the cooling water inside the generator.

[0007] The utility model provides a device for optimizing the treatment of cooling water inside a generator, which introduces mixed water of water after condensate polishing and water before condensate polishing and water before ammonia addition as the internal cooling water makeup water of the generator to adjust the conductivity and pH of the cooling water inside the generator. The device includes:

[0008] Water mixing unit, electric flow control pipeline, water replenishment sampling and detection unit, internal cooling water tank, internal cooling water tank inlet pipeline, stator cooling water pump, water outlet sampling and detection unit and control system;

[0009] The water mixing unit includes a first water inlet pipe, a second water inlet pipe and a water mixing valve; the electric flow control pipeline is provided with an electric regulating valve; the water replenishment sampling detection unit includes a first conductivity meter, and the water outlet sampling detection unit includes a second conductivity meter;

[0010] The control system is respectively connected to the mixing valve, the electric regulating valve, the first conductivity meter and the second conductivity meter for communication;

[0011] The first water inlet pipe is used to introduce the water after the condensate polishing and ammonia addition and transport it to the first water inlet of the water mixing valve; the second water inlet pipe is used to introduce the incoming water before the condensate polishing and ammonia addition and transport it to the second water inlet of the water mixing valve; the water mixing valve is used to mix the water after the condensate polishing and ammonia addition and the incoming water before the condensate polishing and ammonia addition in a specified proportion to obtain the output water of the first water mixing unit as the internal cooling water makeup;

[0012] The electric regulating valve is used to receive instructions from the control system to adjust the flow rate of the internal cooling water makeup; the first conductivity meter is used to obtain the makeup water conductivity value of the internal cooling water makeup, and send the makeup water conductivity value to the control system; the second conductivity meter is used to obtain the outlet water conductivity value of the stator cooling water pump, and send the outlet water conductivity value to the control system; the control system is used to control the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the makeup water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, so as to adjust the conductivity and pH of the internal cooling water of the generator.

[0013] The embodiment of the utility model sets two sampling detection points, namely, an outlet water sampling detection unit and a replenishing water sampling detection unit, to respectively detect the replenishing water conductivity value and the outlet water conductivity value of the internal cooling water tank, so that the control system controls the valves of the mixing valve and the electric regulating valve to a matching opening size according to the replenishing water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, thereby adjusting the conductivity and pH of the internal cooling water of the generator. By adopting the two sampling detection values ​​before and after the replenishing water conductivity value and the outlet water conductivity value of the internal cooling water tank, and adjusting the valve opening size of the mixing valve in combination with the internal cooling water target control value set by the user, compared with the control based on a single sampling detection value, the fluctuation amplitude when the control valve is adjusted is effectively reduced, so that the conductivity value and pH value at the inlet of the internal cooling water tank and the conductivity value and pH value in the internal cooling water tank can be more quickly consistent. By setting up an electric regulating valve and controlling its valve opening to match that of the water mixing valve, the mixing ratio of the incoming water and the amount of water replenishment flow after mixing are matched, thereby achieving a more stable increase in the conductivity of the internal cooling water when it is needed, and a faster decrease in the conductivity of the internal cooling water when it is needed, thereby further reducing the fluctuation amplitude when the control valve is adjusted, and thus shortening the system regulation period. In addition, by detecting the conductivity value of the water outlet of the internal cooling water tank after being fully mixed by the stator cooling water pump and using it as the outlet conductivity value of the internal cooling water tank, the conductivity value after uniform mixing in the internal cooling water tank can be more accurately reflected, thereby making the pH and conductivity of the internal cooling water of the generator more precisely regulated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a generator internal cooling water optimization treatment device provided in the first embodiment of the utility model;

[0015] Figure 2 This is a structural schematic diagram of another generator internal cooling water optimization treatment device provided in the second embodiment of the utility model;

[0016] Figure 3 This is a structural schematic diagram of another generator internal cooling water optimization treatment device provided in Embodiment 3 of the present utility model;

[0017] Figure 4 This is a structural schematic diagram of another generator internal cooling water optimization treatment device provided by the fourth embodiment of the utility model;

[0018] Figure 5 This is a structural example diagram of an example of a generator internal cooling water optimization treatment device provided in the fourth embodiment of the utility model;

[0019] Figure 6 This is a flow chart of a method for optimizing cooling water treatment in a generator provided in Embodiment 5 of the present utility model;

[0020] Figure 7 This is a flowchart of a method for optimizing cooling water treatment in a generator provided in Embodiment 5 of the present utility model;

[0021] Figure 8 This is a flow chart of another method for optimizing cooling water treatment in a generator provided in Embodiment 6 of the present utility model;

[0022] Fig. 9 This is an example flow chart of another method for optimizing the treatment of cooling water inside a generator provided in Example 6 of the utility model. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. In addition, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. It should also be noted that, for ease of description, only parts related to the present invention are shown in the accompanying drawings, rather than all structures.

[0024] Embodiment 1

[0025] Figure 1 This is a schematic diagram of the structure of a generator internal cooling water optimization treatment device provided in Example 1 of the utility model. This embodiment can be applied to the situation where the pH value of the generator internal cooling water is controlled by controlling its conductivity, thereby achieving effective suppression of the copper corrosion rate of the internal cooling water.

[0026] It should be noted that, unless otherwise clearly specified and limited, the terms such as "interconnected", "connected", "installed", and "set" should be understood in a broad sense. It can be a direct connection, or it can be indirectly connected through an extension pipeline or other pipelines, or it can be a communication between the insides of two components. In addition, the terms such as "front stage" and "rear stage" refer to the front or rear of a device along the direction of water flow. The "ball valve" and "needle valve" described in this application can use manual or electric valves according to the control purpose. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0027] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0028] It is understandable that the "DL / T801-2010 Technical Requirements for Internal Cooling Water Quality and Systems of Large Generators" states: "When the pH value of the internal cooling water increases from 7 to 8, the copper corrosion rate can be reduced to 1 / 6, and when the pH value of the internal cooling water increases from 8 to 8.5, the copper corrosion rate can be reduced to 1 / 15". Therefore, by controlling the pH value and conductivity value of the internal cooling water of the generator within an appropriate range of values, the copper corrosion rate of the internal cooling water can be effectively suppressed. It is known that after the condensate is refined, its carbon dioxide concentration can be considered to be equal to zero. In this case, the pH value of the condensate refined water is logarithmically positively correlated with the conductivity value, that is, as the conductivity increases, the pH value will also increase. Since the conductivity value is easier to measure and measure accurately than the pH value, the pH value of the internal cooling water of the generator can be controlled by controlling the conductivity of the internal cooling water of the generator. Adding ammonia to the condensate polishing water can increase its conductivity and pH value. Therefore, by introducing two incoming water sources, the water after condensate polishing and the water before condensate polishing, and mixing them in a specified proportion as the internal cooling water of the generator, the conductivity and pH value of the cooling water inside the generator can be adjusted.

[0029] like Figure 1 As shown, the generator internal cooling water optimization treatment device described in this embodiment includes:

[0030] A water mixing unit 1, an electric flow control pipeline 2, a water replenishment sampling and detection unit 3, an internal cooling water tank 4, an internal cooling water tank water inlet pipeline 5, a stator cooling water pump 6, an outlet water sampling and detection unit 7 and a control system 8.

[0031] The water mixing unit 1 includes a first water inlet pipe 9, a second water inlet pipe 10 and a water mixing valve 11; the electric flow control pipeline 2 is provided with an electric regulating valve 12; the water replenishment sampling detection unit 3 includes a first conductivity meter 13, and the water outlet sampling detection unit 7 includes a second conductivity meter 14.

[0032] The first water inlet pipe 9 is connected to the first water inlet of the mixing valve 11, the second water inlet pipe 10 is connected to the second water inlet of the mixing valve 11, the water outlet of the mixing valve 11 is connected to the water inlet end of the electric flow control pipeline 2 via a pipe, the water outlet end of the electric flow control pipeline 2 is connected to the water inlet end of the water replenishment sampling and detection unit 7 and the water inlet of the internal cooling water tank 4 via the water inlet pipe of the internal cooling water tank 4, the water outlet of the internal cooling water tank 4 is connected to the water inlet of the stator cooling water pump 6 via a pipe, and the water outlet of the stator cooling water pump 6 is connected to the water inlet end of the water outlet sampling and detection unit 7 and the generator via a pipe.

[0033] The control system 8 is communicatively connected with the water mixing valve 11 , the electric regulating valve 12 , the first conductivity meter 13 and the second conductivity meter 14 , respectively.

[0034] The first water inlet pipe 9 is used to introduce the water after condensate polishing and adding ammonia and transport it to the first water inlet of the mixing valve 11; the second water inlet pipe 10 is used to introduce the incoming water before condensate polishing and adding ammonia and transport it to the second water inlet of the mixing valve 11; the mixing valve 11 is used to mix the water after condensate polishing and adding ammonia and the incoming water before condensate polishing and adding ammonia in a specified proportion to obtain the output water of the first mixing water unit as internal cooling water makeup.

[0035] The electric regulating valve 12 is used to receive instructions from the control system 8 to adjust the flow rate of the internal cooling water makeup; the first conductivity meter 13 is used to obtain the makeup water conductivity value of the internal cooling water makeup, and send the makeup water conductivity value to the control system 8; the second conductivity meter 14 is used to obtain the outlet water conductivity value of the stator cooling water pump 6, and send the outlet water conductivity value to the control system 8; the control system 8 is used to control the valves of the mixing valve 11 and the electric regulating valve 12 to matching opening sizes according to the makeup water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, so as to adjust the conductivity and pH of the internal cooling water of the generator.

[0036] The mixing valve 11 controls the flow ratio of the two incoming water by adjusting the opening of the internal channel of the valve. When the opening of one side of the mixing valve 11 increases, the water flow on that side increases, while the flow on the other side decreases relatively, thereby achieving the adjustment of the mixing ratio.

[0037] The electric regulating valve 12 receives a signal from the control system (eg, a 4-20 mA standard signal) to drive the valve to change the cross-sectional area between the valve core and the valve seat to control the flow of the pipeline medium and realize an automatic regulating function.

[0038] In one embodiment, the valves of the mixing valve 11 and the electric regulating valve 12 are controlled to match the opening sizes, including: when the valve opening of the first water inlet of the mixing valve 11 is increased, the valve of the electric regulating valve 12 is controlled to be adjusted to the first opening value to adjust the water inlet flow of the internal cooling water tank to the first flow value; when the valve opening of the first water inlet of the mixing valve 11 is unchanged, the valve of the electric regulating valve 12 is controlled to be stable between the second opening value and the third opening value to adjust the water inlet flow of the internal cooling water tank between the second flow value and the third flow value; when the valve opening of the first water inlet of the mixing valve 11 is reduced, the valve of the electric regulating valve 12 is controlled to be adjusted to the fourth opening value to adjust the water inlet flow of the internal cooling water tank to the fourth flow value; optionally, the first opening value is less than the second opening value, the second opening value is less than the third opening value, and the third opening value is less than the fourth opening value, and accordingly, the first flow value is less than the second flow value, the second flow value is less than the third flow value, and the third flow value is less than the fourth flow value.

[0039] It can be understood that the internal cooling water replenishment water obtained after mixing by the mixing unit enters the internal cooling water tank and mixes with the original internal cooling water in the internal cooling water tank. Since the volume of the internal cooling water tank is usually large, it takes a certain amount of time to mix to a uniform state. When the conductivity value needs to be increased (i.e., the valve opening of the first water inlet of the water mixing valve 11 is increased to increase the proportion of the water after the condensate polishing treatment and ammonia addition), by setting a lower water inlet flow rate of the internal cooling water tank, the conductivity value of the internal cooling water in the internal cooling water tank can be slowly increased to the target range, so as to prevent the high ammonia concentration and large flow of water inlet from causing the conductivity value of the internal cooling water in the internal cooling water tank to rise rapidly in a short period of time or even exceed the target range, thereby increasing the fluctuation range and regulation cycle of the conductivity.

[0040] Since water with high conductivity is more likely to form deposits on metal surfaces, these deposits can act as catalysts for corrosion reactions. Therefore, when it is necessary to reduce the conductivity (i.e., control the valve opening of the first water inlet of the mixing valve 11 to be reduced to reduce the proportion of water after condensate polishing and ammonia addition), by setting a higher water inlet flow rate of the internal cooling water tank, the conductivity value of the internal cooling water in the internal cooling water tank can be quickly reduced to the target range, thereby replacing the original high conductivity water in the generator internal cooling water system as soon as possible to reduce the corrosion effect caused by the high conductivity water.

[0041] The embodiment of the utility model sets two sampling detection points, namely an outlet water sampling detection unit and a make-up water sampling detection unit, to respectively detect the make-up water conductivity value and the outlet water conductivity value of the internal cooling water tank, so that the control system controls the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the make-up water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, thereby realizing the regulation of the conductivity and pH of the cooling water inside the generator. By adopting the two sampling values ​​of the make-up water conductivity value and the outlet water conductivity value of the internal cooling water tank, and combining the internal cooling water target control value set by the user to adjust the valve opening of the mixing valve, compared with the control based on a single sampling value only, the fluctuation amplitude of the control valve adjustment is effectively reduced, so that the conductivity value and pH value at the inlet of the internal cooling water tank and the conductivity value and pH value in the internal cooling water tank tend to be consistent more quickly; and by setting an electric regulating valve and controlling its valve opening to match the valve opening of the mixing valve, the matching of the incoming water mixing ratio and the make-up water flow rate after mixing is achieved, thereby achieving a more stable increase in the conductivity of the internal cooling water when it needs to be increased, and a faster decrease in the conductivity of the internal cooling water when it needs to be decreased, thereby further reducing the fluctuation amplitude of the control valve adjustment, and thus shortening the system regulation period. In addition, by detecting the conductivity value obtained from the outlet water of the internal cooling water tank after sufficient mixing by the stator cooling water pump and using it as the outlet water conductivity value of the internal cooling water tank, the conductivity value after uniform mixing in the internal cooling water tank can be more accurately reflected, thereby making the adjustment of the pH and conductivity of the cooling water in the generator more precise.

[0042] Embodiment 2

[0043] Figure 2 Schematic diagram of the structure of another generator internal cooling water optimization treatment device provided in the second embodiment of the utility model, such as Figure 2 As shown, this embodiment is further optimized on the basis of the above embodiment, and the following contents are added:

[0044] The water mixing unit 1 also includes: a first static mixer 15, a first water mixing output pipeline 16 and a second water mixing output pipeline 17. The water outlet of the water mixing valve 11 is connected to the first water inlet of the first static mixer 15 via the first water mixing output pipeline 16. The water inlet end of the second water mixing output pipeline 17 intersects with the first water mixing output pipeline 16 at a first intersection. The water outlet end of the second water mixing output pipeline 17 is connected to the second water inlet of the first static mixer 15. The water outlet of the first static mixer 15 is connected to the water inlet end of the electric flow control pipeline 2 via a pipeline. The first static mixer 15 is used to perform secondary mixing on the water outlet of the first water mixing unit to obtain the water outlet of the second water mixing unit as new internal cooling water replenishment.

[0045] Among them, the static mixer is a high-efficiency mixing device without moving parts. Its basic working mechanism is to use the mixing unit fixed in the tube to change the flow state of the fluid in the tube to achieve good dispersion and sufficient mixing between different fluids.

[0046] It is understandable that by providing the first static mixer, the outlet water of the water mixing valve can be mixed twice, so that the internal cooling water replenishment obtained by the water mixing valve can be mixed more fully before entering the internal cooling water tank, and a more uniform internal cooling water replenishment can be obtained. By detecting the conductivity value of the internal cooling water replenishment obtained after the second mixing by the first static mixer and using it as the replenishment conductivity value of the internal cooling water replenishment, the conductivity value of the internal cooling water replenishment after mixing evenly can be more accurately reflected, thereby making the pH and conductivity of the internal cooling water of the generator more accurately regulated.

[0047] The water mixing unit 1 further includes: a third water inlet pipe 18 and a fourth water inlet pipe 19; the water outlet end of the third water inlet pipe 18 intersects with the second mixed water output pipeline 17 at a second intersection, the water inlet end of the third water inlet pipe 18 intersects with the first water inlet pipe 9 at a third intersection, the water inlet end of the fourth water inlet pipe 19 intersects with the second water inlet pipe 10 at a fourth intersection, and the water outlet end of the fourth water inlet pipe 19 intersects with the first mixed water output pipeline 16 at a fifth intersection;

[0048] A third shut-off valve 20 is provided between the first intersection and the second intersection on the second mixed water output pipeline 17, a second flow regulating valve 21 is provided on the third water inlet pipeline 18, a fourth shut-off valve 22 is provided between the third intersection on the first water inlet pipeline 9 and the first water inlet of the mixing valve 11, a fifth shut-off valve 23 is provided between the fourth intersection on the second water inlet pipeline 10 and the second water inlet of the mixing valve 11, a third flow regulating valve 24 is provided on the fourth water inlet pipeline 19, and a sixth shut-off valve 25 is provided on the first mixed water output pipeline 16 after the water outlet of the mixing valve 11 and before the first intersection and the fifth intersection.

[0049] Optionally, the first intersection point and the fifth intersection point may or may not coincide with each other.

[0050] Optionally, the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve and the sixth shut-off valve are ball valves, and the second flow regulating valve and the third flow regulating valve are needle valves.

[0051] It is understandable that the first water inlet pipeline and the second water inlet pipeline are automatic water inlet pipelines, and the third water inlet pipeline and the fourth water inlet pipeline are manual water inlet pipelines. When the system is in automatic mode, the second flow regulating valve and the third flow regulating valve are closed to close the third water inlet pipeline and the fourth water inlet pipeline, and the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve and the sixth shut-off valve are opened to open the first water inlet pipeline and the second water inlet pipeline. When the system is in manual mode (for example, the manual water inlet pipeline needs to be opened due to abnormality of the automatic water inlet pipeline or maintenance), the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve and the sixth shut-off valve are closed to close the first water inlet pipeline and the second water inlet pipeline, and the second flow regulating valve and the third flow regulating valve are opened to open the third water inlet pipeline and the fourth water inlet pipeline.

[0052] This embodiment can obtain more fully and evenly mixed internal cooling water replenishment by arranging a static mixer after the water mixing valve, thereby further reducing the mixing time after entering the internal cooling water tank, thereby shortening the system regulation period. By arranging a manual water inlet pipeline, it can be ensured that when the system is shut down due to an abnormality in the automatic water inlet pipeline or the need for maintenance, it can still continue to work through the manual water inlet pipeline, thereby reducing the system regulation period increased due to work interruption.

[0053] Embodiment 3

[0054] Figure 3 Schematic diagram of the structure of another generator internal cooling water optimization treatment device provided in the third embodiment of the utility model, such as Figure 3 As shown, this embodiment is further optimized on the basis of the above embodiment, and the following contents are added:

[0055] The device further comprises: a recovery water tank 26, a first circulation pipeline 27 and a second circulation pipeline 28;

[0056] The water outlet of the water replenishment sampling detection unit 3 and the water outlet of the water outlet sampling detection unit 7 are respectively connected to the water inlet of the recovery water tank 26 through pipelines, and the water outlet of the recovery water tank 26 is connected to the water inlet of the first circulation pipeline 27. The water outlet of the first circulation pipeline 27 intersects with the first water inlet pipeline 9 at the sixth intersection;

[0057] The water inlet end of the second circulation pipeline 28 intersects with the internal cooling water tank water inlet pipeline 5 at the seventh intersection, and the water outlet end of the second circulation pipeline 28 intersects with the first circulation pipeline 27 at the eighth intersection;

[0058] The recovery water tank 26 is equipped with an electronic liquid level meter 29, which is in communication connection with the control system 8. The electronic liquid level meter 29 is used to detect the internal liquid level value of the recovery water tank 26 and send the internal liquid level value to the control system 8;

[0059] A seventh shutoff valve 30 is provided between the water inlet end of the first circulation pipeline 27 and the eighth intersection on the first circulation pipeline 27, an eighth shutoff valve 31 is provided on the second circulation pipeline 28, and a ninth shutoff valve 32 is provided between the seventh intersection on the internal cooling water tank inlet pipeline 5 and the water inlet of the internal cooling water tank 4;

[0060] A circulating water pump 33 is provided between the eighth intersection point on the first circulating pipeline 27 and the water outlet end of the first circulating pipeline 27, and the circulating water pump 33 is communicatively connected with the control system 8;

[0061] Correspondingly, the control system 8 is also used to start the circulating water pump 33 according to the internal liquid level value, so as to pump the recovered water in the recovery water tank 26 to the first water inlet pipe 9 through the first circulation pipeline 27, or to start the circulating water pump 33 according to the make-up water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, so as to pump the unqualified water in the internal cooling water tank inlet pipe 5 to the first water inlet pipe 9 through the second circulation pipeline 28.

[0062] Optionally, the seventh shut-off valve 30 , the eighth shut-off valve 31 and the ninth shut-off valve 32 are ball valves.

[0063] It is understandable that by setting up the recovery water tank 26, the sampled water of the sampling and detection unit can be recovered, and by setting up the first circulation pipeline 27, the recovered water in the recovery water tank 26 can be transported back to the first water inlet pipeline 9 for recycling, thereby reducing the wastewater discharge of the power plant, saving the water used for internal cooling water, and achieving energy conservation and emission reduction. By setting up the second circulation pipeline 28, the unqualified water in the internal cooling water tank inlet pipeline 5 can be returned to the first water inlet pipeline 9 until it is qualified and then transported to the internal cooling water tank 4, thereby reducing the time required for the later stage mixing.

[0064] In one embodiment, when the sampling test of the outlet water sampling detection unit 7 is qualified and the sampling test of the replenishing water sampling detection unit 3 is unqualified, the ninth shutoff valve 32 is closed, the eighth shutoff valve 31 is opened, and the unqualified water in the inner cooling water tank inlet pipe 5 is returned to the first water inlet pipe 9 through the second circulation pipeline 28 by the circulating water pump 33, until the sampling test of the replenishing water sampling detection unit 3 and the outlet water sampling detection unit 7 are both qualified, the circulating water pump 33 is closed, the eighth shutoff valve 31 is closed, and the ninth shutoff valve 32 is opened, so that the qualified inner cooling water replenishment water in the inner cooling water tank inlet pipe 5 is transported to the inner cooling water tank 4. When the sampling test of the outlet water sampling detection unit 7 is unqualified, regardless of whether the sampling test of the replenishing water sampling detection unit 3 is qualified, the second circulation pipeline 28 is closed and the ninth shutoff valve 32 is opened, so that the original inner cooling water in the inner cooling water tank 4 is adjusted by the inner cooling water replenishment water in the inner cooling water tank inlet pipe 5.

[0065] In one embodiment, the recycled water and / or unqualified water in the first circulation pipeline 27 is transported to the first water inlet pipeline 9 after being processed by a condensate polishing processor.

[0066] In one embodiment, a second static mixer 34 is further provided before the third intersection on the first water inlet pipe 9, and the first water inlet of the second static mixer 34 introduces the water obtained by the polishing of condensate and the addition of ammonia, and the water outlet of the first circulation pipeline 27 is connected to the second water inlet of the second static mixer 34. The second static mixer 34 is used to mix the water obtained by the polishing of condensate and the addition of ammonia with the recycled water transported by the first circulation pipeline 27 and then transport the mixed water to the first water inlet of the mixing valve 11 or the third water inlet pipeline 18.

[0067] It is understandable that by providing the second static mixer, the condensate polishing water with ammonia and the recycled water can be fully and evenly mixed, thereby ensuring that the water inlet to the mixing valve is uniform condensate polishing water with ammonia.

[0068] In one embodiment, a first one-way valve is further provided before the second static mixer 34 on the first water inlet pipeline 9 to prevent the backflow of the rear-stage water.

[0069] In one embodiment, a second one-way valve is further provided before the fourth intersection on the second water inlet pipe 10 to prevent the backflow of the rear-stage water.

[0070] In one embodiment, the first water inlet pipeline 9 and the second water inlet pipeline 10 may also be provided with water inlet shutoff valves respectively near the water source end and near the cabinet end of the cooling water optimization treatment device in the generator according to the length of the pipeline.

[0071] Furthermore, the device further comprises: an internal cooling water tank overflow water recovery pipeline 35, the internal cooling water tank overflow water recovery pipeline comprises a recovery water inlet pipe 36, a maximum water level limit pipe 37, a water tank liquid level control pipe 38, and a recovery water outlet pipe 39;

[0072] An overflow outlet pipe 40 is provided in the inner cooling water tank 4, and the overflow outlet pipe 40 passes through the bottom of the inner cooling water tank 4. The height of the upper end of the overflow outlet pipe 40 does not exceed the highest water level of the inner cooling water tank 4, and the lower end of the overflow outlet pipe 40 is flush with the bottom of the tank or extends below the bottom of the tank;

[0073] The lower end of the overflow outlet pipe 40 is connected to one end of the recovery water inlet pipe 36, and the other end of the recovery water inlet pipe 36 is connected to the atmosphere upward and is higher than the maximum water level line; one end of the maximum water level limit pipe 37 is connected to the recovery water inlet pipe 36 and the height is flush with the maximum water level line, and the other end of the maximum water level limit pipe 37 is connected to the upper end of the recovery water outlet pipe 39 and the height does not exceed the maximum water level line; the water tank liquid level control pipe 38 is arranged in parallel below the maximum water level limit pipe 37, one end of the water tank liquid level control pipe 38 is connected to the recovery water inlet pipe 36, and the other end of the water tank liquid level control pipe 38 is connected to the recovery water outlet pipe 39 and the height does not exceed one end connected to the recovery water inlet pipe 36; the lower end of the recovery water outlet pipe 39 is connected to the water inlet of the recovery water tank 26;

[0074] A tenth shutoff valve 41 is provided on the recovery water inlet pipe 36 near the lower end of the overflow water outlet pipe 40 , and an eleventh shutoff valve 42 is provided on the water tank liquid level control pipe 38 .

[0075] Optionally, the tenth shut-off valve 41 and the eleventh shut-off valve 42 are ball valves.

[0076] Optionally, the water tank liquid level control pipe 38 can adjust the height up and down according to the liquid level control value of the internal cooling water tank 4.

[0077] In one embodiment, when the water level in the inner cooling water tank 4 reaches or exceeds the highest water level, the overflow water (i.e., the water above the highest water level in the inner cooling water tank) can enter the recovery water tank 26 through the recovery water inlet pipe 36, the highest water level limit pipe 37, the water tank liquid level control pipe 38, and the recovery water outlet pipe 39 through the normally opened tenth shut-off valve 41 and the eleventh shut-off valve 42. When the water level in the inner cooling water tank 4 is lower than the highest water level, the height of the water level in the inner cooling water tank 4 can be controlled by adjusting the height of the water tank liquid level control pipe 38.

[0078] It can be understood that by setting the internal cooling water tank overflow recovery pipeline 35, the internal cooling water tank 4 can be prevented from overflowing due to excessive water inflow, and the effect of energy saving and emission reduction can be achieved by recovering the overflow of the internal cooling water tank 4. In addition, by setting the height-adjustable water tank liquid level control pipe 38, flexible control of the internal cooling water tank liquid level is achieved to meet more liquid level applicable working conditions while ensuring the safe operation of the system.

[0079] Based on the above embodiments, this embodiment realizes the recycling of water in the system by adding a recovery water tank 26, a first circulation pipeline 27, a second circulation pipeline 28, and an internal cooling water tank overflow recovery pipeline 35, thereby achieving the effect of energy saving and emission reduction.

[0080] Embodiment 4

[0081] Figure 4 Schematic diagram of the structure of another generator internal cooling water optimization treatment device provided by the fourth embodiment of the utility model, such as Figure 4 As shown, this embodiment is further optimized on the basis of the above embodiment, and the following contents are added:

[0082] An electromagnetic flowmeter 43 is also arranged in series on the electric flow control pipeline 2 before the electric regulating valve 12 , and the electromagnetic flowmeter 43 is in communication connection with the control system 8 .

[0083] Optionally, the electromagnetic flowmeter 43 may also be arranged in series after the electric regulating valve 12 .

[0084] The electromagnetic flowmeter 43 is used to detect the replenishment flow value of the internal cooling water replenishment, and send the replenishment flow value to the control system 8, so that the control system 8 controls the electric regulating valve 12 to adjust the flow size of the internal cooling water replenishment according to the replenishment flow value.

[0085] In one embodiment, the control system 8 controls the electric regulating valve 12 to adjust the valve opening to achieve the set water replenishment flow value according to the water replenishment flow value detected in real time by the electromagnetic flow meter 43 .

[0086] Furthermore, the device also includes: a manual flow control pipeline 44, on which a first flow regulating valve 45 is provided, the manual flow control pipeline 44 is arranged in parallel with the electric flow control pipeline 2 and the water flow direction is consistent; a first shut-off valve 46 is also arranged in series before the electromagnetic flowmeter 43 on the electric flow control pipeline 2, and a second shut-off valve 47 is also arranged in series after the electric regulating valve 12 on the electric flow control pipeline 2.

[0087] Optionally, the first shut-off valve 46 and the second shut-off valve 47 are ball valves, and the first flow regulating valve 45 is a needle valve.

[0088] It is understandable that the manual flow control pipeline 44 can be set as a supplement to the electric flow control pipeline 2 to ensure that when the electric flow control pipeline 2 is abnormal or needs maintenance, the system can also adjust the water replenishment flow value through the manual flow control pipeline 44.

[0089] In one embodiment, when the electric flow control pipeline 2 can operate normally, the first flow control valve 45 is closed, and the first shut-off valve 46 and the second shut-off valve 47 are opened; when the electric flow control pipeline 2 is abnormal or needs to be closed, the first shut-off valve 46 and the second shut-off valve 47 are closed, and the first flow control valve 45 is opened.

[0090] Furthermore, the water replenishment sampling detection unit 3 also includes a first pH meter 48 ( Figure 4 The first pH meter 48 is connected to the control system 8 for communication, and is used to detect the pH value of the internal cold water replenishment, and send the pH value of the replenishment water to the control system 8; the outlet water sampling detection unit 7 also includes a second pH meter 49 ( Figure 4 The second pH meter 49 is connected in communication with the control system 8 to detect the outlet pH value of the stator cooling water pump 6 and send the outlet pH value to the control system 8.

[0091] It can be understood that based on the mathematical relationship between the conductivity and pH of the internal cooling water, the control of the pH value of the internal cooling water can be indirectly achieved by controlling the conductivity which is easier to measure and more accurately; and by setting the first pH meter 48 and the second pH meter 49, the actual pH value at the inlet of the internal cooling water tank (actual water replenishment pH value) and the internal pH value of the internal cooling water tank (actual water outlet pH value) can be obtained in real time, so that they can be compared with the pH value calculated from the conductivity value according to the mathematical relationship between conductivity and pH (theoretical water replenishment pH value and theoretical water outlet pH value) to verify the accuracy of the theoretical value.

[0092] In one embodiment, the control system 8 is also used to control the valves of the mixing valve 11 and the electric regulating valve 12 to matching opening sizes according to the make-up water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, and further correct the valve opening of the mixing valve 11 and the electric regulating valve 12 according to the make-up water pH value and the outlet water pH value.

[0093] In one embodiment, when the difference between the actual water replenishment pH value obtained by the first pH meter 48 and the corresponding theoretical water replenishment pH value exceeds a predetermined threshold and / or the actual water outlet pH value obtained by the second pH meter 49 and the corresponding theoretical water outlet pH value exceed a predetermined threshold, the control system 8 issues an alarm prompt.

[0094] Furthermore, a filtering device 50 is provided before the water inlet of the internal cooling water tank 4 on the internal cooling water tank inlet pipeline 5, for filtering particulate impurities in the internal cooling water replenishment water.

[0095] Furthermore, a first pressure measuring branch 51 and a first pressure reducing valve 52 are sequentially arranged on the first water inlet pipe 9 along the water flow direction, and a second pressure measuring branch 53 and a second pressure reducing valve 54 are sequentially arranged on the second water inlet pipe 10 along the water flow direction; a first pressure gauge valve 55 and a first pressure transmitter 56 are serially arranged on the first pressure measuring branch 51 along the water flow direction, and a second pressure gauge valve 57 and a second pressure transmitter 58 are serially arranged on the second pressure measuring branch 53 along the water flow direction; the first pressure gauge valve 55 is a sampling control valve of the first pressure transmitter 56, and the second pressure gauge valve 57 is a sampling control valve of the second pressure transmitter 58.

[0096] The first pressure transmitter 56 and the second pressure transmitter 58 are respectively connected to the control system 8 for communication; when the first pressure gauge valve 55 is opened, the first pressure transmitter 56 measures the first pressure value of the water after the condensate polishing and ammonia addition in the first water inlet pipe 9, and sends the first pressure value to the control system 8; when the second pressure gauge valve 57 is opened, the second pressure transmitter 58 measures the second pressure value of the water before the condensate polishing and ammonia addition in the second water inlet pipe 10, and sends the second pressure value to the control system 8.

[0097] Optionally, the first pressure gauge valve 55 and the second pressure gauge valve 57 are needle valves.

[0098] In one embodiment, the first pressure reducing valve 52 is used in conjunction with the first pressure transmitter 56 to adjust the pressure of the water after the condensate polishing and ammonia addition to 0.6 MPa, thereby providing a safe and reliable water pressure for the normal operation of the subsequent equipment.

[0099] In one embodiment, the second pressure reducing valve 54 is used in conjunction with the second pressure transmitter 58 to adjust the pressure of the incoming water before the condensate polishing and ammonia addition to 0.6 MPa, thereby providing a safe and reliable incoming water pressure for the normal operation of the subsequent equipment.

[0100] In one embodiment, the control system 8 is also used to determine whether the incoming water pressure of the first water inlet pipe 9 is too high based on the first pressure value sent by the first pressure transmitter 56, and to determine whether the incoming water pressure of the second water inlet pipe 10 is too high based on the second pressure value sent by the second pressure transmitter 58. When the incoming water pressure of any water inlet pipeline is too high, the corresponding water inlet shut-off valve is controlled to close, and an alarm is issued.

[0101] Figure 5 This is a structural example diagram of an example of a generator internal cooling water optimization treatment device provided by the fourth embodiment of the utility model, such as Figure 5 As shown, the generator internal cooling water optimization treatment device example includes: a mixing water unit, a mixing water outlet flow control pipeline, a mixing water outlet sampling and detection pipeline, an internal cooling water tank internal cooling water outlet sampling and detection pipeline, and a control system;

[0102] The water mixing unit is connected with a first water inlet pipe 1 and a second water inlet pipe 2, the first water inlet pipe 1 is connected to the water after the condensate water polishing treatment and the addition of ammonia, and the second water inlet pipe 2 is connected to the water before the condensate water polishing treatment and the addition of ammonia;

[0103] The first water inlet pipe 1 is connected in sequence with a first cut-off ball valve 4, a first pressure transmitter 8, a first pressure reducing valve 10, and a manual second cut-off ball valve 15;

[0104] The second water inlet pipe 2 is connected in sequence with a fourth cut-off ball valve 5, a second pressure transmitter 9, a second pressure reducing valve 11, a check valve 12, and a manual fifth cut-off ball valve 16;

[0105] The water outlet of the mixing unit is connected to the water inlet of the mixing outlet flow control pipeline, and the mixing outlet flow control pipeline is sequentially installed in series according to the water flow direction with an electromagnetic flow meter inlet cut-off ball valve 22, an electromagnetic flow meter 23, an electric regulating valve 24, and an electric regulating valve outlet cut-off ball valve 25;

[0106] The water outlet of the mixed water outlet flow control pipeline is connected to the inner cooling water tank water inlet through the inner cooling water tank water inlet pipeline 49, and the inner cooling water tank water inlet pipeline 49 is sequentially installed with a filter 37 and an inner cooling water tank water inlet cut-off ball valve 38;

[0107] The sampling and testing pipeline of the outlet of the mixing water unit includes a sixth cut-off ball valve 27 and a first testing instrument group installed in series on the pipeline. The first testing instrument group includes a first conductivity meter 29 and a first pH meter 30. The sampling inlet of the sampling and testing pipeline of the outlet of the mixing water unit is connected to the cold water inlet pipeline 49 in the internal cooling water tank.

[0108] The sampling detection pipeline for the cold water outlet in the inner cooling water tank includes a seventh cut-off ball valve and a second detection instrument group installed in series on the pipeline, the second detection instrument group includes a second conductivity meter 31 and a second pH meter 32, and the sampling inlet of the sampling detection pipeline for the cold water outlet in the inner cooling water tank is connected to the pipeline between the stator cooling water pump outlet and the generator;

[0109] Discharge or recovery of the outlet sampling and testing pipeline of the mixing water unit and the outlet sampling and testing pipeline of the cold water in the internal cooling water tank;

[0110] The control system includes a controller, a display interface and a human-computer interaction control interface. The controller is electrically connected to the display interface and the human-computer interaction control interface. The controller is electrically connected to the incoming water pressure signal represented by the first pressure transmitter 8 and the second pressure transmitter 9, as well as the analog signal or switch signal of the electromagnetic flowmeter 23, the first conductivity meter 29, the first pH meter 30, the second conductivity meter 31, and the second pH meter 32. The controller is also electrically connected to the control signal of the mixing valve 19 and the electric regulating valve 24, controls the mixing valve 19 and the electric regulating valve 24 of the mixing unit, adjusts the inlet flow rate of the cold water in the internal cooling water tank, and realizes that the conductivity value of the internal cooling water in the internal cooling water tank is always maintained at 0.8 to 1.0 microSiemens / cm (μS / cm), and the pH value is maintained at a preset target of 8 to 9.

[0111] The water mixing unit includes at least one level of water mixing equipment. There are many water mixing equipment or devices. In this example, the water mixing unit adopts a two-level water mixing equipment. The water mixing unit includes a water mixing valve 19 and a static mixer 21. The first water inlet pipe and the second water inlet pipe of the water mixing unit are the two water inlet pipes of the water mixing valve 19. The water inlet of the static mixer 21 is connected to the water mixing outlet of the water mixing valve 19 through a water mixing output pipeline. The water mixing output pipeline is equipped with a manual eighth shut-off ball valve 20 in series. The water inlet of the static mixer 21 is also connected to the dosing port of the static mixer 21 through a water mixing output branch pipe. The water mixing output branch pipe is equipped with a manual normally open ninth shut-off ball valve 14. The outlet of the static mixer 21 is the water outlet of the water mixing unit.

[0112] In the present example, the generator internal cooling water optimization treatment device is automatically operated, the eighth cut-off ball valve 20 is opened, and the solution after the mixing valve 19 is proportioned is divided into two paths, one path directly enters the water inlet of the static mixer 21, and the other path enters the dosing port of the static mixer 21 through the manual normally open ninth cut-off ball valve 14 on the mixed water output branch pipe, and is fully mixed again, so that the second conductivity meter 31 and the second pH meter 32 for sampling and testing at the outlet of the subsequent stator cooling water pump are more accurate. When the mixing valve 19 fails, the eighth cut-off ball valve 20, the manual second cut-off ball valve 15 and the manual fifth cut-off ball valve 16 are closed to inspect the mixing valve 19.

[0113] The water mixing unit is connected with a first water inlet pipe 1 and a second water inlet pipe 2, the first water inlet pipe 1 is connected to the water after the condensate water polishing treatment and the addition of ammonia, and the second water inlet pipe 2 is connected to the water before the condensate water polishing treatment and the addition of ammonia;

[0114] The first water inlet pipe 1 is connected in sequence with a first cut-off ball valve 4 , a first pressure transmitter 8 , a first pressure reducing valve 10 , and a manual second cut-off ball valve 15 .

[0115] The first pressure transmitter 8 is connected to the first water inlet pipe through the first pressure detection branch; the first pressure detection branch is also equipped with a fourth water inlet flow regulating needle valve 6, after opening the first pressure transmitter 8 displays the water pressure of the first water inlet pipe.

[0116] When the first water inlet pipe leading to the condensate polishing water after ammonia treatment is relatively long, it is feasible to install a far-end cut-off ball valve 3 at the introduction point (or sampling position) of the water after ammonia treatment, and it is also feasible to install a near-end cut-off ball valve 4 near the cabinet of the internal cooling water optimization device in this example. Further, it is feasible to install the second cut-off ball valve 15 at the inlet of the mixing unit.

[0117] The second water inlet pipe 2 is sequentially connected with a fourth cut-off ball valve 5 , a second pressure transmitter 9 , a second pressure reducing valve 11 , a check valve 12 , and a manual fifth cut-off ball valve 16 .

[0118] The second pressure transmitter 9 is connected to the second water inlet pipe through the second pressure detection branch; the second pressure detection branch is also equipped with a fifth water inlet flow regulating needle valve 7, after opening, the second pressure transmitter 9 displays the water pressure of the second water inlet pipe. Furthermore, it is feasible to install the fifth cut-off ball valve 16 at the inlet of the mixing unit.

[0119] The second water inlet pipe can also introduce desalted water. Since the pressure fluctuation of desalted water is relatively large, the internal cooling water optimization treatment device still prefers to use condensed water polishing to treat the incoming water before adding ammonia. After adding a voltage and current stabilizing device to stabilize the pressure fluctuation of desalted water in the front stage of the existing second water inlet pipe, desalted water can also be used as incoming water, and mixed with the condensed water polishing and ammonia-added water introduced from the first water inlet pipe to achieve the optimization treatment of the internal cooling water of the generator.

[0120] The water mixing unit also includes a manual water control pipeline for the first water inlet pipeline and a manual water control pipeline for the second water inlet pipeline, i.e., a manual water control pipeline for the water after adding ammonia and a manual water control pipeline for the water before adding ammonia. The water inlet of the manual water control pipeline for the first water inlet pipeline is connected to the water outlet of the first pressure reducing valve 10, and the water outlet of the manual water control pipeline for the first water inlet pipeline is connected to the mixed water output branch pipe between the dosing port of the static mixer 21 and the manual ninth shut-off ball valve 14. The manual water control pipeline for the first water inlet pipeline is connected to the first flow regulating needle valve 13;

[0121] The water inlet of the manual water control pipeline of the second water inlet pipeline is connected to the water outlet of the check valve 12, and the water outlet of the manual water control pipeline of the second water inlet pipeline is also connected to the water inlet of the static mixer 21. The manual water control pipeline of the second water inlet pipeline is sequentially connected with a flow regulating needle valve 17 and a manual tenth cut-off ball valve 18. The first flow regulating needle valve 13 and the second flow regulating needle valve 17 are manually regulated.

[0122] In the generator internal cooling water optimization treatment device of this example, when fully operated manually, the manual second cut-off ball valve 15, the manual fifth cut-off ball valve 16 and the eighth cut-off ball valve 20 are closed, the tenth cut-off ball valve 18 is opened, the ninth cut-off ball valve 14 is closed, the first flow regulating needle valve 13 and the second flow regulating needle valve 17 are opened, and the water from the first water inlet pipe and the second water inlet pipe enter the dosing port and the water inlet of the static mixer 21 respectively for mixing. By adjusting the first flow regulating needle valve 13 and the second flow regulating needle valve 17 respectively, the water from the second water inlet pipe and the water from the first water inlet pipe can be fully and evenly mixed in proportion, so that the pH value of the mixed solution is maintained in the preset target range.

[0123] The water inlet of the mixed water outlet flow control pipeline is connected to the water outlet of the mixed water unit, and the electromagnetic flow meter inlet cut-off ball valve 22, the electromagnetic flow meter 23, the electric regulating valve 24, and the electric regulating valve outlet cut-off ball valve 25 are sequentially installed in series on the mixed water outlet flow control pipeline according to the water flow direction;

[0124] When the device is automatically running, the electromagnetic flowmeter 23 converts the flow rate of the water outlet of the mixing unit into an analog numerical signal, and sends the flow rate signal to the control system for display, participating in the control system's control of the mixing valve 19 and the electric regulating valve 24.

[0125] Electric regulating valve 24, when the device is automatically running, the control system can automatically control the electric regulating valve 24 according to the current detection values ​​of the electromagnetic flowmeter 23, the first conductivity meter 29 and the second pH meter 30 at the outlet of the mixing unit, and the second conductivity meter 31 and the second pH meter 32 at the outlet of the cold water in the internal cooling water tank, so as to control the water inlet flow of the internal cooling water tank.

[0126] Furthermore, the electromagnetic flowmeter inlet cut-off ball valve 22 and the electric regulating valve outlet cut-off ball valve 25 adopt manually controlled valves to facilitate the switching between automatic operation and manual operation.

[0127] The water outlet of the mixed water outlet flow control pipeline is connected to the inner cooling water tank water inlet through the inner cooling water tank water inlet pipeline 49, and the inner cooling water tank water inlet pipeline 49 is sequentially installed with a filter 37 and an inner cooling water tank water inlet cut-off ball valve 38.

[0128] The filter 37 filters the particulate matter in the incoming water. The internal cooling water tank inlet cut-off ball valve 38 is the internal cooling water tank inlet valve, which is opened during normal operation and closed during maintenance or shutdown.

[0129] The mixed water outlet flow manual control bypass is connected in parallel with the mixed water outlet flow control pipeline and has the same flow direction. A manual third flow regulating needle valve 26 is installed in series on the mixed water outlet flow manual control bypass.

[0130] In the generator internal cooling water optimization treatment device of this example, when it is manually operated, the flow rate of the mixed water outlet of the mixing unit entering the internal cooling water tank can be adjusted through the manual third flow regulating needle valve 26, providing a control means for manual movement.

[0131] The inlet of the debugging drainage pipeline 54 is connected to the inner cooling water tank water inlet pipeline 49 before the inlet of the filter 37. The debugging drainage pipeline 54 is equipped with a manual eleventh cut-off ball valve 36 in series, and the effluent of the debugging drainage pipeline 54 is discharged or recycled.

[0132] During the early commissioning of the generator internal cooling water optimization treatment device, the eleventh manual cut-off ball valve 36 is opened, and the water that does not meet the standards generated during the commissioning process can be discharged through the commissioning drainage pipeline 54.

[0133] The sampling and testing pipeline of the outlet of the mixing water unit includes the sixth cut-off ball valve 27 and the first testing instrument group installed in series on the pipeline. The first testing instrument group includes the first conductivity meter 29 and the first pH meter 30. The sampling inlet of the sampling and testing pipeline of the outlet of the mixing water unit is connected to the cold water inlet pipeline 49 in the internal cooling water tank. The sampling and testing of the first conductivity meter 29 and the first pH meter 30 can be done in series or in parallel, which is not limited here. Figure 5 As shown, the first conductivity meter 29 and the first pH meter 30 are connected in series on the sampling and testing pipeline. Installing a flow meter 28 in front of the first conductivity meter 29 and the first pH meter 30 so that the sampled water flow rate meets the detection requirements is also one of the feasible implementation methods. Preferably, the sampling inlet, i.e., the water inlet, of the sampling and testing pipeline at the outlet of the mixing water unit is connected to the outlet of the mixing water outlet flow control pipeline, which can more accurately reflect the actual values ​​of the conductivity and pH value of the incoming water after mixing. The outlet water of the sampling and testing pipeline at the outlet of the mixing water unit and the sampling and testing pipeline at the cold water outlet in the internal cooling water tank is discharged or recycled.

[0134] The sampling and testing pipeline for the cold water outlet in the inner cooling water tank includes a seventh cut-off ball valve and a second testing instrument group installed in series on the pipeline. The second testing instrument group includes a second conductivity meter 31 and a second pH meter 32. The sampling inlet of the sampling and testing pipeline for the cold water outlet in the inner cooling water tank is connected to the pipeline between the stator cooling water pump outlet and the generator. Figure 5As shown, the seventh shut-off ball valve is equipped with two to control the opening and closing of the sampled water, a proximal shut-off ball valve 34 is installed at the water inlet near the second detection instrument group, and a distal shut-off ball valve 35 is installed on the rear-stage pipeline of the stator cooling water pump outlet; the second conductivity meter 31 and the second pH meter 32 are connected in series on the sampling detection pipeline. It is also feasible to install a flow meter 33 in the front stage of the second conductivity meter 31 and the second pH meter 32 so that the sampled water flow meets the detection requirements. Of course, the second conductivity meter 31 and the second pH meter 32 can also be connected in parallel in the sampling detection pipeline, and a flow meter can be installed at the sampling water inlet of each instrument, which is feasible and is not limited here. The effluent of the cold water outlet sampling detection pipeline in the internal cooling water tank is discharged or recycled, and recycling is more in line with the emission reduction policy. Figure 5 In the process, the water outlet sampling detection pipeline of the mixing water unit outlet and the water outlet sampling detection pipeline of the inner cooling water tank are connected to the water inlet of the intermediate recovery water tank 44 to achieve recycling and reuse.

[0135] Preferably, the sampling inlet of the cold water outlet sampling detection pipeline in the inner cooling water tank is connected to the stator cooling water pump outlet pipeline. After the water outlet of the inner cooling water tank 42 is fully mixed by the stator cooling water pump, it can better represent the actual value of the conductivity and pH value in the inner cooling water tank 42.

[0136] Example description of the control system: The control system 57 includes a controller, a display interface and a human-computer interaction control interface, and the controller is electrically connected to the display interface and the human-computer interaction control interface.

[0137] Optionally, the controller adopts a programmable logic controller (PLC).

[0138] Optionally, the display interface and human-machine interactive control interface use a touch display. The touch display communicates with the PLC via Ethernet to display various analog data and curves, and realizes parameter setting, historical data query, alarm query and other functions through the human-machine interactive interface.

[0139] The PLC is electrically connected to the water inlet pressure signal represented by the first pressure transmitter 8 and the second pressure transmitter 9, as well as the analog signals or switch signals of the electromagnetic flowmeter 23, the first conductivity meter 29, the first pH meter 30, the second conductivity meter 31, and the second pH meter 32, and the control signals of the mixing valve 19 and the electric regulating valve 24, to control the mixing valve 19 and the electric regulating valve 24 of the mixing unit, and adjust the inlet flow rate of the cold water in the inner cooling water tank, so as to always maintain the conductivity value of the inner cooling water in the inner cooling water tank at 0.8-1.0 μS / cm and the pH value at 8-9, which are preset targets. Further, the conductivity value of the cold water in the inner cooling water tank is maintained at 0.85 μS / cm, and the pH value is maintained at the preset target of 8.5.

[0140] The PLC electrically connects all valves involved in the automatic operation of this example. PLC control of valves is a common technology for technicians in the same field and will not be described in detail in this application.

[0141] PLC is just one type of controller, and other controllers such as microcontroller (MCU, Microcontroller Unit) can also be used without specific limitation.

[0142] Control mechanism. The control system monitors the water inlet pressure represented by the first pressure transmitter 8 and the second pressure transmitter 9; when the water inlet pressure is detected to be abnormal, the electric regulating valve 24 is closed and an alarm prompt pops up on the display screen; the signals of the first pressure transmitter 8 and the second pressure transmitter 9 are also electrically connected to the power plant distributed control system (Distributed Control System, DCS), and when the water inlet pressure is abnormal, a pressure alarm signal can also be transmitted to the DCS.

[0143] When the liquid level detection value of the electronic liquid level meter 43 in the intermediate recovery water tank 44 is greater than its preset target liquid level lower limit, the control system obtains the real-time detection values ​​of the second conductivity meter 31 and the second pH meter 32 at the outlet of the internal cooling water tank, and compares them with the preset target range of the conductivity value and pH value of the cold water outlet in the internal cooling water tank, and controls the opening of the mixing valve 19 and the electric regulating valve 24 in advance.

[0144] When the current detection values ​​of the second conductivity meter 31 and the second pH meter 32 at the cold water outlet in the internal cooling water tank are higher than the preset target values, the conductivity value at the outlet of the internal cooling water tank can be maintained at 0.8-1.0μS / cm and the pH value can be maintained at the preset target of 8-9 as soon as possible by controlling the mixing valve 19 to close in advance or reduce the water inflow after adding ammonia (dosing), and increase the water inflow before adding ammonia or desalted water.

[0145] When the current detection values ​​of the second conductivity meter 31 and the second pH meter 32 at the cold water outlet of the internal cooling water tank are less than or equal to the preset target values, the control system automatically adjusts the opening of the mixing valve 19 according to the current real-time detection value of the first conductivity meter 29 sampled and detected at the outlet of the mixing water unit, and compares it with the preset target value of the first conductivity meter, so as to maintain the conductivity value at the outlet of the internal cooling water tank at 0.8-1.0μS / cm and the pH value at the preset target of 8-9, and at the same time control the water inlet flow rate of the cold water inlet in the internal cooling water tank at 0.5-0.8 tons / hour (t / h), and the water inlet flow rate can be adjusted by the opening size of the electric regulating valve 24.

[0146] The preset target liquid level of the electronic liquid level meter 43 in the intermediate recovery water tank 44, the preset target range of the conductivity value and pH value at the cold water outlet in the internal cooling water tank, the preset target value of the first conductivity meter 29 for sampling and detection at the outlet of the mixing unit and other target parameters can be set through the touch screen (touch screen integrated display and human-computer interaction functions).

[0147] The various signals in this example can be transmitted to the power plant DCS in real time, such as the pressure values ​​of the first pressure transmitter 8 and the second pressure transmitter 9, the opening value of the mixing valve 19 and the opening value of the electric regulating valve 24, the flow value of the electromagnetic flowmeter 23, the conductivity and pH value of the outlet of the mixing unit represented by the first conductivity meter 29 and the first pH meter 30, the conductivity and pH value of the outlet of the cold water in the inner cooling water tank represented by the second conductivity meter 31 and the second pH meter 32, the liquid level value of the intermediate recovery water tank represented by the electronic liquid level meter 43, and the status of various electric valves involved in the automatic operation, which can be transmitted to the power plant DCS in the form of 4-20mA signal or switch signal;

[0148] Various alarm signals generated in this example can also be transmitted to the power plant DCS control system in real time, such as pressure, liquid level, conductivity and pH at the outlet of the mixing water unit, conductivity and pH alarm signals at the outlet of the cooling water tank, which are transmitted to the power plant DCS in the form of switch signals.

[0149] The intermediate recovery water tank 44 collects water from the sampling detection pipeline at the outlet of the mixing water unit, water from the sampling detection pipeline at the outlet of the internal cooling water tank, and overflow water during the operation of the internal cooling water tank.

[0150] The water inlet installed on the upper part of the intermediate recovery water tank 44, the sampling and detection pipeline of the outlet of the mixing water unit, the sampling and detection pipeline of the outlet of the cold water in the internal cooling water tank, and the water outlet of the overflow water in the internal cooling water tank during operation are all connected to the water inlet of the intermediate recovery water tank 44, and the bottom of the intermediate recovery water tank 44 is connected to the inlet of the drainage pipeline 48. The drainage pipeline 48 is serially installed with a normally open electric twelfth cut-off ball valve 46, and the outlet of the drainage pipeline 48 is connected to the water-using equipment. The intermediate recovery water tank 44 is equipped with an electronic liquid level meter 43 for detecting the internal liquid level. In this example, the outlet of the drainage pipeline 48 is connected to the steam inlet of the power plant condenser for recycling.

[0151] Furthermore, a manual thirteenth shut-off ball valve 47 is also installed in series on the drainage pipeline 48 .

[0152] Furthermore, the intermediate water recovery tank 44 is also provided with a maintenance sewage pipeline 55 , the inlet of which is connected to the bottom of the intermediate water recovery tank 44 , and a normally closed fourteenth shut-off ball valve 45 is installed in series on the maintenance sewage pipeline 55 .

[0153] The intermediate recovery water tank 44 collects the water from the sampling and testing pipeline at the outlet of the mixing water unit and the water from the sampling and testing pipeline at the outlet of the inner cooling water tank, as well as the overflow water during the operation of the inner cooling water tank. The drainage pipeline 48 discharges the sampling and testing water collected by the intermediate recovery water tank 44 and the overflow water of the inner cooling water tank to the condenser for recycling. The electronic liquid level gauge 43 detects the liquid level of the intermediate recovery water tank. When the liquid level of the intermediate recovery water tank is lower than the lower limit of the target liquid level, the control system 57 can automatically close the electric twelfth shut-off ball valve 46 to shut off the drainage of the drainage pipeline 48 and ensure the vacuum operation of the condenser. The fourteenth shut-off ball valve 45 on the maintenance sewage pipeline 55 is a sewage valve. During maintenance, the fourteenth shut-off ball valve 45 is opened, and the water in the intermediate recovery water tank 44 is discharged through the fourteenth shut-off ball valve 45.

[0154] The internal cooling water tank overflow water recovery pipeline collects the overflow water discharged when the liquid level in the internal cooling water tank is higher than its target liquid level upper limit.

[0155] The overflow recovery pipeline of the internal cooling water tank includes a recovery main pipe and a maximum water level limit outlet branch pipe.

[0156] The inlet of the recovery main pipe is connected to the overflow outlet pipe 51 of the internal cooling water tank. A normally closed maintenance drain valve 39 is installed on the overflow outlet pipe 51 of the internal cooling water tank below the connection. The recovery main pipe is equipped with a fifteenth shut-off ball valve 40 and a fifteenth and sixteenth shut-off ball valves 41 in series along the water flow direction. The fifteenth shut-off ball valve 40 is installed at the inlet of the recovery main pipe. The height of the pipeline section where the fifteenth and sixteenth shut-off ball valves 41 are installed is not lower than the lower limit of the target liquid level of the internal cooling water tank. The rear-stage pipeline of the fifteenth shut-off ball valve 40 is connected to the atmosphere. The outlet of the recovery main pipe can recover overflow water. It is feasible to connect the outlet of the recovery main pipe of the overflow recovery pipe of the internal cooling water tank to the intermediate recovery water tank 44.

[0157] The highest water level limit outlet branch pipe is connected to the atmosphere, the water inlet of the highest water level limit outlet branch pipe is connected to the outlet of the fifteenth cut-off ball valve 40, the outlet is connected to the equipment for recovering overflow water, and the highest section height of the highest water level limit outlet branch pipe is flush with the upper limit of the target liquid level of the inner cooling water tank. It is feasible that the outlet of the highest water level limit outlet branch pipe is connected to the outlet of the fifteenth and sixth cut-off ball valves 41 or directly connected to the intermediate recovery water tank 44.

[0158] This example also includes the cabinet, the mixing unit, the mixing outlet flow control pipeline, the mixing outlet sampling detection pipeline, the internal cooling water tank internal cold water outlet sampling detection pipeline, the control system, the first water inlet pipeline water manual control pipeline, the second water inlet pipeline water manual control pipeline, the main pipelines and main components of the mixing outlet flow manual control bypass are installed in the cabinet. Each pipeline has a connection interface on the cabinet wall.

[0159] Embodiment 5

[0160] Figure 6It is a flow chart of a method for optimizing the treatment of cooling water inside a generator provided in Embodiment 5 of the present utility model. This embodiment can be applied to the situation where the pH value of cooling water inside the generator is controlled by controlling its conductivity, thereby achieving effective suppression of the copper corrosion rate of the cooling water. This method can be implemented by the device for optimizing the treatment of cooling water inside the generator described in Embodiment 5 of the present utility model.

[0161] like Figure 6 As shown, the generator internal cooling water optimization treatment method includes the following steps:

[0162] S100, obtaining the internal cooling water target control value set by the user and the outlet water conductivity value of the stator cooling water pump collected by the outlet water sampling detection unit.

[0163] In one embodiment, the target control value of the internal cooling water includes at least one of a target pH control value and a target conductivity control value; wherein the target pH control value includes: a target pH warning value, a target pH upper limit value and a target pH lower limit value, and the target conductivity control value includes: a target conductivity warning value, a target conductivity upper limit value and a target conductivity lower limit value.

[0164] The target pH warning value and the target conductivity warning value are the pH upper limit warning value and the conductivity upper limit warning value of the cooling water in the generator respectively. When the pH value of the cooling water in the generator is higher than the pH upper limit warning value and / or the conductivity value is higher than the conductivity upper limit warning value, the copper corrosion rate of the generator will be accelerated, endangering the life and safe operation of the generator equipment.

[0165] In one embodiment, when the pH value of the cooling water in the generator is higher than the pH upper limit alarm value and / or the conductivity value is higher than the conductivity upper limit alarm value, an alarm prompt is issued. The alarm prompt includes but is not limited to a text alarm and a sound alarm.

[0166] The target conductivity upper limit value and the target conductivity lower limit value are respectively the end point values ​​of the conductivity range that can effectively reduce the copper ion content in the cooling water in the generator to reduce the copper corrosion rate.

[0167] Optionally, the target pH warning value, the target pH upper limit value, the target pH lower limit value, the target conductivity warning value, the target conductivity upper limit value and the target conductivity lower limit value can be set according to empirical values ​​or relevant standards.

[0168] S110. Determine a target conductivity warning value, a target conductivity upper limit value, and a target conductivity lower limit value according to the internal cooling water target control value, wherein the target conductivity lower limit value is smaller than the target conductivity upper limit value, and the target conductivity upper limit value is smaller than the target conductivity warning value.

[0169] In one embodiment, when the internal cooling water target control value only includes the target pH control value, the target conductivity warning value, target conductivity upper limit value and target conductivity lower limit value corresponding to the target pH warning value, target pH upper limit value and target pH lower limit value are obtained by looking up a preset pH conductivity mapping table or calculating according to the pH conductivity empirical relationship.

[0170] S120: Compare the outlet water conductivity value with the target conductivity warning value.

[0171] S130. Control the valves of the water mixing valve and the electric regulating valve to matching opening sizes according to the comparison result, so as to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value.

[0172] The embodiment of the utility model obtains the internal cooling water target control value set by the user and the outlet water conductivity value of the stator cooling water pump collected by the outlet water sampling detection unit, and then determines the target conductivity warning value, the target conductivity upper limit value and the target conductivity lower limit value according to the internal cooling water target control value, and then compares the outlet water conductivity value with the target conductivity warning value, and finally controls the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the comparison result, so as to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value, thereby realizing the regulation of the conductivity and pH of the internal cooling water of the generator.

[0173] In one embodiment, controlling the valves of the mixing valve and the electric regulating valve to match the opening sizes according to the comparison result includes:

[0174] When the outlet water conductivity value is greater than or equal to the target conductivity warning value, the valve of the first water inlet of the water mixing valve is controlled to be closed, and the valve opening of the electric regulating valve is controlled to be adjusted to the maximum;

[0175] According to the sampling period set by the user, return to obtain a new outlet water conductivity value and compare the new outlet water conductivity value with the target conductivity warning value, and perform control operations on the mixing valve and the electric regulating valve according to the new comparison result, until the obtained outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0176] When the outlet water conductivity value is less than the target conductivity warning value, the outlet water conductivity value is compared with the target conductivity upper limit value and the target conductivity lower limit value respectively, and the valves of the mixing valve and the electric regulating valve are controlled to matching opening sizes according to the comparison results, so as to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value.

[0177] In one embodiment, when the outlet water conductivity value is less than the target conductivity warning value, the outlet water conductivity value is compared with the target conductivity upper limit value and the target conductivity lower limit value, respectively, and the valves of the mixing valve and the electric regulating valve are controlled to matching opening sizes according to the comparison results, including: when the outlet water conductivity value is less than the target conductivity lower limit value, obtaining the replenishment water conductivity value of the internal cold water replenishment collected by the replenishment water sampling and detection unit; comparing the replenishment water conductivity value with the target conductivity lower limit value, and controlling the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the comparison result, so as to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value.

[0178] In one embodiment, the step of comparing the make-up water conductivity value with the target conductivity lower limit value, and controlling the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the comparison result, includes:

[0179] When the make-up water conductivity value is less than the target conductivity lower limit value, the valve opening of the first water inlet of the water mixing valve is controlled to increase, and the valve opening of the electric regulating valve is controlled to adjust the water inlet flow of the internal cooling water tank to a first flow value;

[0180] According to the sampling period set by the user, return to obtain a new outlet water conductivity value and compare the new outlet water conductivity value with the target conductivity warning value, and perform control operations on the mixing valve and the electric regulating valve according to the new comparison result, until the obtained outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0181] When the make-up water conductivity value is greater than or equal to the target conductivity lower limit value, the valve opening of the water mixing valve is controlled to remain unchanged, and the valve opening of the electric regulating valve is controlled to adjust the water inlet flow rate of the internal cooling water tank between the second flow rate value and the third flow rate value;

[0182] According to the sampling period set by the user, return to obtain a new outlet water conductivity value and compare the new outlet water conductivity value with the target conductivity warning value, and perform control operations on the mixing valve and the electric regulating valve according to the new comparison result, until the obtained outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0183] The first flow value is less than the second flow value, and the second flow value is less than or equal to the third flow value.

[0184] In one embodiment, when the outlet water conductivity value is less than the target conductivity warning value, the outlet water conductivity value is compared with the target conductivity upper limit value and the target conductivity lower limit value, respectively, and the valves of the mixing valve and the electric regulating valve are controlled to matching opening sizes according to the comparison results, so as to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value, and further includes:

[0185] When the outlet water conductivity value is less than the target conductivity warning value and greater than the target conductivity upper limit value, obtaining the replenishment water conductivity value of the internal cooling water replenishment collected by the replenishment water sampling and detection unit;

[0186] The make-up water conductivity value is compared with the target conductivity upper limit value, and the valves of the mixing valve and the electric regulating valve are controlled to matching opening sizes according to the comparison result, so as to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value.

[0187] In one embodiment, the step of comparing the make-up water conductivity value with the target conductivity upper limit value, and controlling the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the comparison result, includes:

[0188] When the make-up water conductivity value is greater than the target conductivity upper limit value, the valve opening of the first water inlet of the water mixing valve is controlled to decrease, and the valve opening of the electric regulating valve is controlled to adjust the water inlet flow rate of the internal cooling water tank to a fourth flow rate value;

[0189] According to the sampling period set by the user, return to obtain a new outlet water conductivity value and compare the new outlet water conductivity value with the target conductivity warning value, and perform control operations on the mixing valve and the electric regulating valve according to the new comparison result, until the obtained outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0190] When the make-up water conductivity value is less than or equal to the target conductivity upper limit value, the valve opening of the water mixing valve is controlled to remain unchanged, and the valve opening of the electric regulating valve is controlled to adjust the water inlet flow rate of the internal cooling water tank between the second flow rate value and the third flow rate value;

[0191] According to the sampling period set by the user, return to obtain a new outlet water conductivity value and compare the new outlet water conductivity value with the target conductivity warning value, and perform control operations on the mixing valve and the electric regulating valve according to the new comparison result, until the obtained outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0192] The second flow value is less than or equal to the third flow value, and the third flow value is less than the fourth flow value.

[0193] In one embodiment, when the outlet water conductivity value is less than the target conductivity warning value, the outlet water conductivity value is compared with the target conductivity upper limit value and the target conductivity lower limit value, respectively, and the valves of the mixing valve and the electric regulating valve are controlled to matching opening sizes according to the comparison results, and further includes:

[0194] When the outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value, the valve opening of the mixing valve is controlled to remain unchanged, and the valve opening of the electric regulating valve is controlled to adjust the water inlet flow of the internal cooling water tank between the second flow value and the third flow value; wherein the second flow value is less than or equal to the third flow value.

[0195] For example, the target pH warning value determined according to the internal cooling water target control value set by the user is 8.71, the target pH upper limit value is 8.57, and the target pH lower limit value is 8.4; accordingly, the target conductivity warning value is 1.4μS / cm, the target conductivity upper limit value is 1.0μS / cm, and the target conductivity lower limit value is 0.8μS / cm. The first flow value is set to 0.3t / h, the second flow value is set to 0.5t / h, the third flow value is set to 0.8t / h, and the fourth flow value is set to 0.9t / h. Figure 7 A flow chart illustrating an example of a method for optimizing cooling water treatment in a generator provided in Embodiment 5 of the present invention is provided.

[0196] The embodiment of the utility model adopts two sampling values ​​before and after the fill water conductivity value and the outlet water conductivity value of the internal cooling water tank, and adjusts the valve opening of the mixing valve in combination with the internal cooling water target control value set by the user. Compared with the control based on a single sampling value only, the fluctuation amplitude of the control valve adjustment is effectively reduced, so that the conductivity value and pH value at the inlet of the internal cooling water tank and the conductivity value and pH value in the internal cooling water tank tend to be consistent more quickly; and by controlling the valve opening of the electric regulating valve to match the valve opening of the mixing valve, the matching of the incoming water mixing ratio and the size of the fill water flow after mixing is achieved, thereby achieving a more stable increase in the conductivity of the internal cooling water when it is needed, and a faster decrease in the conductivity of the internal cooling water when it is needed, thereby further reducing the fluctuation amplitude of the control valve adjustment, and thus shortening the system regulation period. In addition, by detecting the conductivity value obtained from the outlet water of the internal cooling water tank after sufficient mixing by the stator cooling water pump and using it as the outlet water conductivity value of the internal cooling water tank, the conductivity value after uniform mixing in the internal cooling water tank can be more accurately reflected, thereby making the adjustment of the pH and conductivity of the cooling water in the generator more precise.

[0197] Embodiment 6

[0198] Figure 8 is a flow chart of another method for optimizing cooling water inside a generator provided by the sixth embodiment of the present utility model. This embodiment is further optimized on the basis of the sixth embodiment above. Figure 8 As shown, the method comprises the following steps:

[0199] S200, obtaining the internal cooling water target control value set by the user and the outlet water conductivity value of the stator cooling water pump collected by the outlet water sampling detection unit.

[0200] S210. Determine a target conductivity warning value, a target conductivity upper limit value, and a target conductivity lower limit value according to the internal cooling water target control value, wherein the target conductivity lower limit value is smaller than the target conductivity upper limit value, and the target conductivity upper limit value is smaller than the target conductivity warning value.

[0201] S220: Compare the outlet water conductivity value with the target conductivity warning value.

[0202] S230. Control the mixing valve and the electric regulating valve to matching opening sizes according to the comparison result, and control the opening and closing of the eighth shut-off valve, the ninth shut-off valve and the circulating water pump to control the outlet water conductivity value between the target conductivity lower limit value and the target conductivity upper limit value.

[0203] Compared with the generator internal cooling water optimization treatment method described in Example 5, this embodiment optimizes and adds the control content of the recovery circulation pipeline, specifically including:

[0204] When the outlet water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value, obtaining the replenishment water conductivity value of the internal cooling water replenishment collected by the replenishment water sampling and detection unit, and comparing the replenishment water conductivity value with the target conductivity upper limit value and the target conductivity lower limit value respectively;

[0205] When the make-up water conductivity value is less than the target conductivity lower limit value, the ninth shutoff valve is controlled to be closed to shut off the water inlet pipeline of the internal cooling water tank, the eighth shutoff valve and the circulating water pump are controlled to be opened to open the second circulating pipeline, the valve opening of the first water inlet of the mixing valve is controlled to be increased, and the valve opening of the electric regulating valve is controlled to adjust the water outlet flow of the electric flow control pipeline to the first flow value;

[0206] According to the sampling period set by the user, return to obtain a new make-up water conductivity value and compare the new make-up water conductivity value with the target conductivity upper limit value and the target conductivity lower limit value respectively, and perform control operations on the mixing valve, the electric regulating valve, the internal cooling water tank water inlet pipeline and the second circulation pipeline according to the new comparison result, until the obtained make-up water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0207] When the make-up water conductivity value is greater than the target conductivity upper limit value, the ninth shutoff valve is controlled to close to shut off the inner cooling water tank water inlet pipeline, and the eighth shutoff valve and the circulating water pump are controlled to open to open the second circulating pipeline; the valve opening of the first water inlet of the mixing valve is controlled to decrease, and the valve opening of the electric regulating valve is controlled to adjust the water outlet flow of the electric flow control pipeline to a fourth flow value;

[0208] According to the sampling period set by the user, return to obtain a new make-up water conductivity value and compare the new make-up water conductivity value with the target conductivity upper limit value and the target conductivity lower limit value respectively, and perform control operations on the mixing valve, the electric regulating valve, the internal cooling water tank water inlet pipeline and the second circulation pipeline according to the new comparison result, until the obtained make-up water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value;

[0209] When the make-up water conductivity value is greater than or equal to the target conductivity lower limit value and less than or equal to the target conductivity upper limit value, the ninth shut-off valve is controlled to open to open the water inlet pipeline of the internal cooling water tank, and the eighth shut-off valve and the circulating water pump are controlled to close to shut off the second circulation pipeline; the valve opening of the mixing valve is controlled to remain unchanged, and the valve opening of the electric regulating valve is controlled to adjust the water inlet flow of the internal cooling water tank between the second flow value and the third flow value.

[0210] In one embodiment, the method also includes: obtaining an internal liquid level value of a recovery water tank sent by an electronic liquid level meter; comparing the internal liquid level value with a preset liquid level upper limit value; when the internal liquid level value is greater than or equal to the liquid level upper limit value, controlling the seventh shut-off valve and the circulating water pump to open, so as to pump the recovered water in the recovery water tank to the first water inlet pipe through the first circulation pipeline.

[0211] For example, the target pH warning value determined according to the internal cooling water target control value set by the user is 8.71, the target pH upper limit value is 8.57, and the target pH lower limit value is 8.4; accordingly, the target conductivity warning value is 1.4μS / cm, the target conductivity upper limit value is 1.0μS / cm, and the target conductivity lower limit value is 0.8μS / cm. The first flow value is set to 0.3t / h, the second flow value is set to 0.5t / h, the third flow value is set to 0.8t / h, and the fourth flow value is set to 0.9t / h. Fig. 9 A flow chart illustrating an example of a method for optimizing cooling water treatment in a generator provided in Embodiment 6 of the present invention is provided.

[0212] Based on the above method embodiment, this embodiment realizes the recycling of water used in the system by adding control over the recovery water tank, the first circulation pipeline, the second circulation pipeline and the overflow recovery pipeline of the internal cooling water tank, thereby achieving the effect of energy saving and emission reduction.

[0213] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A generator internal cooling water optimization treatment device, which introduces a mixture of water after condensate polishing and ammonia addition and water before condensate polishing and ammonia addition as generator internal cooling water makeup water to adjust the conductivity and pH of the generator internal cooling water, characterized in that: include: Water mixing unit, electric flow control pipeline, water replenishment sampling and detection unit, internal cooling water tank, internal cooling water tank inlet pipeline, stator cooling water pump, water outlet sampling and detection unit and control system; The water mixing unit includes a first water inlet pipe, a second water inlet pipe and a water mixing valve; the electric flow control pipeline is provided with an electric regulating valve; the water replenishment sampling detection unit includes a first conductivity meter, and the water outlet sampling detection unit includes a second conductivity meter; The control system is respectively connected to the mixing valve, the electric regulating valve, the first conductivity meter and the second conductivity meter for communication; The first water inlet pipe is used to introduce the water after the condensate polishing and ammonia addition and transport it to the first water inlet of the water mixing valve; the second water inlet pipe is used to introduce the incoming water before the condensate polishing and ammonia addition and transport it to the second water inlet of the water mixing valve; the water mixing valve is used to mix the water after the condensate polishing and ammonia addition and the incoming water before the condensate polishing and ammonia addition in a specified proportion to obtain the output water of the first water mixing unit as the internal cooling water makeup; The electric regulating valve is used to receive instructions from the control system to adjust the flow rate of the internal cooling water makeup; the first conductivity meter is used to obtain the makeup water conductivity value of the internal cooling water makeup, and send the makeup water conductivity value to the control system; the second conductivity meter is used to obtain the outlet water conductivity value of the stator cooling water pump, and send the outlet water conductivity value to the control system; the control system is used to control the valves of the mixing valve and the electric regulating valve to matching opening sizes according to the makeup water conductivity value, the outlet water conductivity value and the internal cooling water target control value set by the user, so as to adjust the conductivity and pH of the internal cooling water of the generator.

2. The generator internal cooling water optimization treatment device according to claim 1, characterized in that: An electromagnetic flowmeter is also arranged in series on the electric flow control pipeline before the electric regulating valve, and the electromagnetic flowmeter is communicatively connected with the control system; The electromagnetic flowmeter is used to detect the replenishment flow value of the internal cooling water replenishment, and send the replenishment flow value to the control system, so that the control system controls the electric regulating valve to adjust the flow size of the internal cooling water replenishment according to the replenishment flow value.

3. The generator internal cooling water optimization treatment device according to claim 2, characterized in that: Also includes: A manual flow control pipeline, wherein a first flow regulating valve is disposed on the manual flow control pipeline, and the manual flow control pipeline is arranged in parallel with the electric flow control pipeline and has the same water flow direction; A first cut-off valve is also arranged in series before the electromagnetic flowmeter on the electric flow control pipeline, and a second cut-off valve is also arranged in series after the electric regulating valve on the electric flow control pipeline.

4. The generator internal cooling water optimization treatment device according to claim 1, characterized in that: The water replenishment sampling detection unit also includes a first pH meter connected in series or in parallel with the first conductivity meter, the first pH meter is connected in communication with the control system, and is used to detect the pH value of the water replenishment of the internal cold water replenishment, and send the pH value of the water replenishment to the control system; The outlet water sampling detection unit also includes a second pH meter arranged in series or parallel with the second conductivity meter, and the second pH meter is communicatively connected to the control system for detecting the outlet water pH value of the stator cooling water pump and sending the outlet water pH value to the control system.

5. The generator internal cooling water optimization treatment device according to claim 1, characterized in that: The water mixing unit further includes: a first static mixer, a first water mixing output pipeline and a second water mixing output pipeline, the water outlet of the water mixing valve is connected to the first water inlet of the first static mixer via the first water mixing output pipeline, the water inlet end of the second water mixing output pipeline intersects with the first water mixing output pipeline at a first intersection, the water outlet end of the second water mixing output pipeline is connected to the second water inlet of the first static mixer, and the water outlet of the first static mixer is connected to the water inlet end of the electric flow control pipeline via a pipeline; The first static mixer is used to perform secondary mixing on the water output from the first water mixing unit to obtain water output from the second water mixing unit as new internal cooling water replenishment.

6. The generator internal cooling water optimization treatment device according to claim 5, characterized in that: The water mixing unit further comprises: a third water inlet pipe and a fourth water inlet pipe; The water outlet end of the third water inlet pipe intersects with the second mixed water output pipeline at a second intersection, the water inlet end of the third water inlet pipe intersects with the first water inlet pipe at a third intersection, the water inlet end of the fourth water inlet pipe intersects with the second water inlet pipe at a fourth intersection, and the water outlet end of the fourth water inlet pipe intersects with the first mixed water output pipeline at a fifth intersection; A third shut-off valve is provided between the first intersection and the second intersection on the second mixed water output pipeline, a second flow regulating valve is provided on the third water inlet pipeline, a fourth shut-off valve is provided between the third intersection on the first water inlet pipeline and the first water inlet of the mixing water valve, a fifth shut-off valve is provided between the fourth intersection on the second water inlet pipeline and the second water inlet of the mixing water valve, a third flow regulating valve is provided on the fourth water inlet pipeline, and a sixth shut-off valve is provided on the first mixed water output pipeline after the water outlet of the mixing water valve and before the first intersection and the fifth intersection.

7. The generator internal cooling water optimization treatment device according to claim 1, characterized in that: Also includes: A recovery water tank, a first circulation pipeline and a second circulation pipeline; The water outlet end of the water replenishment sampling detection unit and the water outlet end of the water outlet sampling detection unit are respectively connected to the water inlet of the recovery water tank through pipelines, the water outlet of the recovery water tank is connected to the water inlet end of the first circulation pipeline, and the water outlet end of the first circulation pipeline and the first water inlet pipeline intersect at a sixth intersection; The water inlet end of the second circulation pipeline intersects with the inner cooling water tank water inlet pipeline at a seventh intersection, and the water outlet end of the second circulation pipeline intersects with the first circulation pipeline at an eighth intersection; The recycling water tank is equipped with an electronic liquid level meter, which is in communication connection with the control system, and is used to detect the internal liquid level value of the recycling water tank and send the internal liquid level value to the control system; A seventh shutoff valve is provided between the water inlet end of the first circulation pipeline and the eighth intersection on the first circulation pipeline, an eighth shutoff valve is provided on the second circulation pipeline, and a ninth shutoff valve is provided between the seventh intersection on the water inlet pipeline of the internal cooling water tank and the water inlet of the internal cooling water tank; A circulating water pump is provided between the eighth intersection on the first circulating pipeline and the water outlet of the first circulating pipeline, and the circulating water pump is communicatively connected with the control system; Correspondingly, the control system is also used to start the circulating water pump according to the internal liquid level value to pump the recovered water in the recovery water tank to the first water inlet pipe through the first circulation pipeline, or to start the circulating water pump according to the make-up water conductivity value, the outlet water conductivity value and the internal cooling water target control value to pump the unqualified water in the internal cooling water tank inlet pipe through the second circulation pipeline to the first water inlet pipe.

8. The generator internal cooling water optimization treatment device according to claim 7, characterized in that: Also includes: An internal cooling water tank overflow recovery pipeline, the internal cooling water tank overflow recovery pipeline comprising a recovery water inlet pipe, a maximum water level limit pipe, a water tank liquid level control pipe, and a recovery water outlet pipe; An overflow outlet pipe is provided in the inner cooling water tank, and the overflow outlet pipe passes through the bottom of the inner cooling water tank. The height of the upper end of the overflow outlet pipe does not exceed the highest water level of the inner cooling water tank, and the lower end of the overflow outlet pipe is flush with the bottom of the tank or extends below the bottom of the tank; The lower end of the overflow outlet pipe is connected to one end of the recovery water inlet pipe, and the other end of the recovery water inlet pipe is connected to the atmosphere upward and is higher than the maximum water level line; one end of the maximum water level limit pipe is connected to the recovery water inlet pipe and its height is flush with the maximum water level line, and the other end of the maximum water level limit pipe is connected to the upper end of the recovery water outlet pipe and its height does not exceed the maximum water level line; the water tank liquid level control pipe is arranged in parallel below the maximum water level limit pipe, one end of the water tank liquid level control pipe is connected to the recovery water inlet pipe, and the other end of the water tank liquid level control pipe is connected to the recovery water inlet pipe; the lower end of the recovery water outlet pipe is connected to the water inlet of the recovery water tank; A tenth shutoff valve is provided on the recovery water inlet pipe near the lower end of the overflow water outlet pipe, and an eleventh shutoff valve is provided on the water tank liquid level control pipe.

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